6728 lines
213 KiB
Diff
6728 lines
213 KiB
Diff
diff -uNr a/fs/Kconfig b/fs/Kconfig
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--- a/fs/Kconfig 2008-07-28 19:40:31.000000000 -0700
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+++ b/fs/Kconfig 2008-08-13 16:19:56.000000000 -0700
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@@ -1348,6 +1348,56 @@
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If unsure, say N.
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+config SQUASHFS
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+ tristate "SquashFS 3.3 - Squashed file system support"
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+ select ZLIB_INFLATE
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+ help
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+ Saying Y here includes support for SquashFS 3.3 (a Compressed
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+ Read-Only File System). Squashfs is a highly compressed read-only
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+ filesystem for Linux. It uses zlib compression to compress both
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+ files, inodes and directories. Inodes in the system are very small
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+ and all blocks are packed to minimise data overhead. Block sizes
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+ greater than 4K are supported up to a maximum of 1 Mbytes (default
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+ block size 128K). SquashFS 3.3 supports 64 bit filesystems and files
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+ (larger than 4GB), full uid/gid information, hard links and timestamps.
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+
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+ Squashfs is intended for general read-only filesystem use, for
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+ archival use (i.e. in cases where a .tar.gz file may be used), and in
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+ embedded systems where low overhead is needed. Further information
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+ and filesystem tools are available from http://squashfs.sourceforge.net.
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+
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+ If you want to compile this as a module ( = code which can be
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+ inserted in and removed from the running kernel whenever you want),
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+ say M here and read <file:Documentation/modules.txt>. The module
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+ will be called squashfs. Note that the root file system (the one
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+ containing the directory /) cannot be compiled as a module.
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+
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+ If unsure, say N.
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+
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+config SQUASHFS_EMBEDDED
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+
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+ bool "Additional option for memory-constrained systems"
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+ depends on SQUASHFS
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+ default n
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+ help
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+ Saying Y here allows you to specify cache size.
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+
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+ If unsure, say N.
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+
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+config SQUASHFS_FRAGMENT_CACHE_SIZE
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+ int "Number of fragments cached" if SQUASHFS_EMBEDDED
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+ depends on SQUASHFS
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+ default "3"
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+ help
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+ By default SquashFS caches the last 3 fragments read from
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+ the filesystem. Increasing this amount may mean SquashFS
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+ has to re-read fragments less often from disk, at the expense
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+ of extra system memory. Decreasing this amount will mean
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+ SquashFS uses less memory at the expense of extra reads from disk.
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+
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+ Note there must be at least one cached fragment. Anything
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+ much more than three will probably not make much difference.
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+
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config VXFS_FS
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tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
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depends on BLOCK
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diff -uNr a/fs/Kconfig.orig b/fs/Kconfig.orig
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--- a/fs/Kconfig.orig 1969-12-31 16:00:00.000000000 -0800
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+++ b/fs/Kconfig.orig 2008-07-28 19:40:31.000000000 -0700
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@@ -0,0 +1,2097 @@
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+#
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+# File system configuration
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+#
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+
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+menu "File systems"
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+
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+if BLOCK
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+
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+config EXT2_FS
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+ tristate "Second extended fs support"
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+ help
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+ Ext2 is a standard Linux file system for hard disks.
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+
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+ To compile this file system support as a module, choose M here: the
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+ module will be called ext2.
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+
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+ If unsure, say Y.
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+
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+config EXT2_FS_XATTR
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+ bool "Ext2 extended attributes"
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+ depends on EXT2_FS
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+ help
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+ Extended attributes are name:value pairs associated with inodes by
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+ the kernel or by users (see the attr(5) manual page, or visit
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+ <http://acl.bestbits.at/> for details).
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+
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+ If unsure, say N.
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+
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+config EXT2_FS_POSIX_ACL
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+ bool "Ext2 POSIX Access Control Lists"
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+ depends on EXT2_FS_XATTR
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+ select FS_POSIX_ACL
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+ help
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+ Posix Access Control Lists (ACLs) support permissions for users and
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+ groups beyond the owner/group/world scheme.
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+
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+ To learn more about Access Control Lists, visit the Posix ACLs for
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+ Linux website <http://acl.bestbits.at/>.
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+
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+ If you don't know what Access Control Lists are, say N
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+
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+config EXT2_FS_SECURITY
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+ bool "Ext2 Security Labels"
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+ depends on EXT2_FS_XATTR
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+ help
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+ Security labels support alternative access control models
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+ implemented by security modules like SELinux. This option
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+ enables an extended attribute handler for file security
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+ labels in the ext2 filesystem.
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+
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+ If you are not using a security module that requires using
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+ extended attributes for file security labels, say N.
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+
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+config EXT2_FS_XIP
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+ bool "Ext2 execute in place support"
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+ depends on EXT2_FS && MMU
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+ help
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+ Execute in place can be used on memory-backed block devices. If you
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+ enable this option, you can select to mount block devices which are
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+ capable of this feature without using the page cache.
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+
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+ If you do not use a block device that is capable of using this,
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+ or if unsure, say N.
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+
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+config FS_XIP
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+# execute in place
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+ bool
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+ depends on EXT2_FS_XIP
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+ default y
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+
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+config EXT3_FS
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+ tristate "Ext3 journalling file system support"
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+ select JBD
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+ help
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+ This is the journalling version of the Second extended file system
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+ (often called ext3), the de facto standard Linux file system
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+ (method to organize files on a storage device) for hard disks.
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+
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+ The journalling code included in this driver means you do not have
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+ to run e2fsck (file system checker) on your file systems after a
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+ crash. The journal keeps track of any changes that were being made
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+ at the time the system crashed, and can ensure that your file system
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+ is consistent without the need for a lengthy check.
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+
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+ Other than adding the journal to the file system, the on-disk format
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+ of ext3 is identical to ext2. It is possible to freely switch
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+ between using the ext3 driver and the ext2 driver, as long as the
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+ file system has been cleanly unmounted, or e2fsck is run on the file
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+ system.
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+
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+ To add a journal on an existing ext2 file system or change the
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+ behavior of ext3 file systems, you can use the tune2fs utility ("man
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+ tune2fs"). To modify attributes of files and directories on ext3
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+ file systems, use chattr ("man chattr"). You need to be using
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+ e2fsprogs version 1.20 or later in order to create ext3 journals
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+ (available at <http://sourceforge.net/projects/e2fsprogs/>).
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+
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+ To compile this file system support as a module, choose M here: the
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+ module will be called ext3.
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+
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+config EXT3_FS_XATTR
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+ bool "Ext3 extended attributes"
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+ depends on EXT3_FS
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+ default y
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+ help
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+ Extended attributes are name:value pairs associated with inodes by
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+ the kernel or by users (see the attr(5) manual page, or visit
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+ <http://acl.bestbits.at/> for details).
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+
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+ If unsure, say N.
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+
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+ You need this for POSIX ACL support on ext3.
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+
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+config EXT3_FS_POSIX_ACL
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+ bool "Ext3 POSIX Access Control Lists"
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+ depends on EXT3_FS_XATTR
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+ select FS_POSIX_ACL
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+ help
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+ Posix Access Control Lists (ACLs) support permissions for users and
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+ groups beyond the owner/group/world scheme.
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+
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+ To learn more about Access Control Lists, visit the Posix ACLs for
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+ Linux website <http://acl.bestbits.at/>.
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+
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+ If you don't know what Access Control Lists are, say N
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+
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+config EXT3_FS_SECURITY
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+ bool "Ext3 Security Labels"
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+ depends on EXT3_FS_XATTR
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+ help
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+ Security labels support alternative access control models
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+ implemented by security modules like SELinux. This option
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+ enables an extended attribute handler for file security
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+ labels in the ext3 filesystem.
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+
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+ If you are not using a security module that requires using
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+ extended attributes for file security labels, say N.
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+
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+config EXT4DEV_FS
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+ tristate "Ext4dev/ext4 extended fs support development (EXPERIMENTAL)"
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+ depends on EXPERIMENTAL
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+ select JBD2
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+ select CRC16
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+ help
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+ Ext4dev is a predecessor filesystem of the next generation
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+ extended fs ext4, based on ext3 filesystem code. It will be
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+ renamed ext4 fs later, once ext4dev is mature and stabilized.
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+
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+ Unlike the change from ext2 filesystem to ext3 filesystem,
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+ the on-disk format of ext4dev is not the same as ext3 any more:
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+ it is based on extent maps and it supports 48-bit physical block
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+ numbers. These combined on-disk format changes will allow
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+ ext4dev/ext4 to handle more than 16 TB filesystem volumes --
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+ a hard limit that ext3 cannot overcome without changing the
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+ on-disk format.
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+
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+ Other than extent maps and 48-bit block numbers, ext4dev also is
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+ likely to have other new features such as persistent preallocation,
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+ high resolution time stamps, and larger file support etc. These
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+ features will be added to ext4dev gradually.
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+
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+ To compile this file system support as a module, choose M here. The
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+ module will be called ext4dev.
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+
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+ If unsure, say N.
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+
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+config EXT4DEV_FS_XATTR
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+ bool "Ext4dev extended attributes"
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+ depends on EXT4DEV_FS
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+ default y
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+ help
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+ Extended attributes are name:value pairs associated with inodes by
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+ the kernel or by users (see the attr(5) manual page, or visit
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+ <http://acl.bestbits.at/> for details).
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+
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+ If unsure, say N.
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+
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+ You need this for POSIX ACL support on ext4dev/ext4.
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+
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+config EXT4DEV_FS_POSIX_ACL
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+ bool "Ext4dev POSIX Access Control Lists"
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+ depends on EXT4DEV_FS_XATTR
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+ select FS_POSIX_ACL
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+ help
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+ POSIX Access Control Lists (ACLs) support permissions for users and
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+ groups beyond the owner/group/world scheme.
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+
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+ To learn more about Access Control Lists, visit the POSIX ACLs for
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+ Linux website <http://acl.bestbits.at/>.
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+
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+ If you don't know what Access Control Lists are, say N
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+
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+config EXT4DEV_FS_SECURITY
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+ bool "Ext4dev Security Labels"
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+ depends on EXT4DEV_FS_XATTR
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+ help
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+ Security labels support alternative access control models
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+ implemented by security modules like SELinux. This option
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+ enables an extended attribute handler for file security
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+ labels in the ext4dev/ext4 filesystem.
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+
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+ If you are not using a security module that requires using
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+ extended attributes for file security labels, say N.
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+
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+config JBD
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+ tristate
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+ help
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+ This is a generic journalling layer for block devices. It is
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+ currently used by the ext3 and OCFS2 file systems, but it could
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+ also be used to add journal support to other file systems or block
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+ devices such as RAID or LVM.
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+
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+ If you are using the ext3 or OCFS2 file systems, you need to
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+ say Y here. If you are not using ext3 OCFS2 then you will probably
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+ want to say N.
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+
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+ To compile this device as a module, choose M here: the module will be
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+ called jbd. If you are compiling ext3 or OCFS2 into the kernel,
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+ you cannot compile this code as a module.
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+
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+config JBD_DEBUG
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+ bool "JBD (ext3) debugging support"
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+ depends on JBD && DEBUG_FS
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+ help
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+ If you are using the ext3 journaled file system (or potentially any
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+ other file system/device using JBD), this option allows you to
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+ enable debugging output while the system is running, in order to
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+ help track down any problems you are having. By default the
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+ debugging output will be turned off.
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+
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+ If you select Y here, then you will be able to turn on debugging
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+ with "echo N > /sys/kernel/debug/jbd/jbd-debug", where N is a
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+ number between 1 and 5, the higher the number, the more debugging
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+ output is generated. To turn debugging off again, do
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+ "echo 0 > /sys/kernel/debug/jbd/jbd-debug".
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+
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+config JBD2
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+ tristate
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+ select CRC32
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+ help
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+ This is a generic journaling layer for block devices that support
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+ both 32-bit and 64-bit block numbers. It is currently used by
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+ the ext4dev/ext4 filesystem, but it could also be used to add
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+ journal support to other file systems or block devices such
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+ as RAID or LVM.
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+
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+ If you are using ext4dev/ext4, you need to say Y here. If you are not
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+ using ext4dev/ext4 then you will probably want to say N.
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+
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+ To compile this device as a module, choose M here. The module will be
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+ called jbd2. If you are compiling ext4dev/ext4 into the kernel,
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+ you cannot compile this code as a module.
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+
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+config JBD2_DEBUG
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+ bool "JBD2 (ext4dev/ext4) debugging support"
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+ depends on JBD2 && DEBUG_FS
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+ help
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+ If you are using the ext4dev/ext4 journaled file system (or
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+ potentially any other filesystem/device using JBD2), this option
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+ allows you to enable debugging output while the system is running,
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+ in order to help track down any problems you are having.
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+ By default, the debugging output will be turned off.
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+
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+ If you select Y here, then you will be able to turn on debugging
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+ with "echo N > /sys/kernel/debug/jbd2/jbd2-debug", where N is a
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+ number between 1 and 5. The higher the number, the more debugging
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+ output is generated. To turn debugging off again, do
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+ "echo 0 > /sys/kernel/debug/jbd2/jbd2-debug".
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+
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+config FS_MBCACHE
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+# Meta block cache for Extended Attributes (ext2/ext3/ext4)
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+ tristate
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+ depends on EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4DEV_FS_XATTR
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+ default y if EXT2_FS=y || EXT3_FS=y || EXT4DEV_FS=y
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+ default m if EXT2_FS=m || EXT3_FS=m || EXT4DEV_FS=m
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+
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+config REISERFS_FS
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+ tristate "Reiserfs support"
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+ help
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+ Stores not just filenames but the files themselves in a balanced
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+ tree. Uses journalling.
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+
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+ Balanced trees are more efficient than traditional file system
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+ architectural foundations.
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+
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+ In general, ReiserFS is as fast as ext2, but is very efficient with
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+ large directories and small files. Additional patches are needed
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+ for NFS and quotas, please see <http://www.namesys.com/> for links.
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+
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+ It is more easily extended to have features currently found in
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+ database and keyword search systems than block allocation based file
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+ systems are. The next version will be so extended, and will support
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+ plugins consistent with our motto ``It takes more than a license to
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+ make source code open.''
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+
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+ Read <http://www.namesys.com/> to learn more about reiserfs.
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+
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+ Sponsored by Threshold Networks, Emusic.com, and Bigstorage.com.
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+
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+ If you like it, you can pay us to add new features to it that you
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+ need, buy a support contract, or pay us to port it to another OS.
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+
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+config REISERFS_CHECK
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+ bool "Enable reiserfs debug mode"
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|
+ depends on REISERFS_FS
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|
+ help
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|
+ If you set this to Y, then ReiserFS will perform every check it can
|
|
+ possibly imagine of its internal consistency throughout its
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+ operation. It will also go substantially slower. More than once we
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+ have forgotten that this was on, and then gone despondent over the
|
|
+ latest benchmarks.:-) Use of this option allows our team to go all
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|
+ out in checking for consistency when debugging without fear of its
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|
+ effect on end users. If you are on the verge of sending in a bug
|
|
+ report, say Y and you might get a useful error message. Almost
|
|
+ everyone should say N.
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+
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+config REISERFS_PROC_INFO
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|
+ bool "Stats in /proc/fs/reiserfs"
|
|
+ depends on REISERFS_FS && PROC_FS
|
|
+ help
|
|
+ Create under /proc/fs/reiserfs a hierarchy of files, displaying
|
|
+ various ReiserFS statistics and internal data at the expense of
|
|
+ making your kernel or module slightly larger (+8 KB). This also
|
|
+ increases the amount of kernel memory required for each mount.
|
|
+ Almost everyone but ReiserFS developers and people fine-tuning
|
|
+ reiserfs or tracing problems should say N.
|
|
+
|
|
+config REISERFS_FS_XATTR
|
|
+ bool "ReiserFS extended attributes"
|
|
+ depends on REISERFS_FS
|
|
+ help
|
|
+ Extended attributes are name:value pairs associated with inodes by
|
|
+ the kernel or by users (see the attr(5) manual page, or visit
|
|
+ <http://acl.bestbits.at/> for details).
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config REISERFS_FS_POSIX_ACL
|
|
+ bool "ReiserFS POSIX Access Control Lists"
|
|
+ depends on REISERFS_FS_XATTR
|
|
+ select FS_POSIX_ACL
|
|
+ help
|
|
+ Posix Access Control Lists (ACLs) support permissions for users and
|
|
+ groups beyond the owner/group/world scheme.
|
|
+
|
|
+ To learn more about Access Control Lists, visit the Posix ACLs for
|
|
+ Linux website <http://acl.bestbits.at/>.
|
|
+
|
|
+ If you don't know what Access Control Lists are, say N
|
|
+
|
|
+config REISERFS_FS_SECURITY
|
|
+ bool "ReiserFS Security Labels"
|
|
+ depends on REISERFS_FS_XATTR
|
|
+ help
|
|
+ Security labels support alternative access control models
|
|
+ implemented by security modules like SELinux. This option
|
|
+ enables an extended attribute handler for file security
|
|
+ labels in the ReiserFS filesystem.
|
|
+
|
|
+ If you are not using a security module that requires using
|
|
+ extended attributes for file security labels, say N.
|
|
+
|
|
+config JFS_FS
|
|
+ tristate "JFS filesystem support"
|
|
+ select NLS
|
|
+ help
|
|
+ This is a port of IBM's Journaled Filesystem . More information is
|
|
+ available in the file <file:Documentation/filesystems/jfs.txt>.
|
|
+
|
|
+ If you do not intend to use the JFS filesystem, say N.
|
|
+
|
|
+config JFS_POSIX_ACL
|
|
+ bool "JFS POSIX Access Control Lists"
|
|
+ depends on JFS_FS
|
|
+ select FS_POSIX_ACL
|
|
+ help
|
|
+ Posix Access Control Lists (ACLs) support permissions for users and
|
|
+ groups beyond the owner/group/world scheme.
|
|
+
|
|
+ To learn more about Access Control Lists, visit the Posix ACLs for
|
|
+ Linux website <http://acl.bestbits.at/>.
|
|
+
|
|
+ If you don't know what Access Control Lists are, say N
|
|
+
|
|
+config JFS_SECURITY
|
|
+ bool "JFS Security Labels"
|
|
+ depends on JFS_FS
|
|
+ help
|
|
+ Security labels support alternative access control models
|
|
+ implemented by security modules like SELinux. This option
|
|
+ enables an extended attribute handler for file security
|
|
+ labels in the jfs filesystem.
|
|
+
|
|
+ If you are not using a security module that requires using
|
|
+ extended attributes for file security labels, say N.
|
|
+
|
|
+config JFS_DEBUG
|
|
+ bool "JFS debugging"
|
|
+ depends on JFS_FS
|
|
+ help
|
|
+ If you are experiencing any problems with the JFS filesystem, say
|
|
+ Y here. This will result in additional debugging messages to be
|
|
+ written to the system log. Under normal circumstances, this
|
|
+ results in very little overhead.
|
|
+
|
|
+config JFS_STATISTICS
|
|
+ bool "JFS statistics"
|
|
+ depends on JFS_FS
|
|
+ help
|
|
+ Enabling this option will cause statistics from the JFS file system
|
|
+ to be made available to the user in the /proc/fs/jfs/ directory.
|
|
+
|
|
+config FS_POSIX_ACL
|
|
+# Posix ACL utility routines (for now, only ext2/ext3/jfs/reiserfs/nfs4)
|
|
+#
|
|
+# NOTE: you can implement Posix ACLs without these helpers (XFS does).
|
|
+# Never use this symbol for ifdefs.
|
|
+#
|
|
+ bool
|
|
+ default n
|
|
+
|
|
+source "fs/xfs/Kconfig"
|
|
+source "fs/gfs2/Kconfig"
|
|
+
|
|
+config OCFS2_FS
|
|
+ tristate "OCFS2 file system support"
|
|
+ depends on NET && SYSFS
|
|
+ select CONFIGFS_FS
|
|
+ select JBD
|
|
+ select CRC32
|
|
+ help
|
|
+ OCFS2 is a general purpose extent based shared disk cluster file
|
|
+ system with many similarities to ext3. It supports 64 bit inode
|
|
+ numbers, and has automatically extending metadata groups which may
|
|
+ also make it attractive for non-clustered use.
|
|
+
|
|
+ You'll want to install the ocfs2-tools package in order to at least
|
|
+ get "mount.ocfs2".
|
|
+
|
|
+ Project web page: http://oss.oracle.com/projects/ocfs2
|
|
+ Tools web page: http://oss.oracle.com/projects/ocfs2-tools
|
|
+ OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/
|
|
+
|
|
+ For more information on OCFS2, see the file
|
|
+ <file:Documentation/filesystems/ocfs2.txt>.
|
|
+
|
|
+config OCFS2_FS_O2CB
|
|
+ tristate "O2CB Kernelspace Clustering"
|
|
+ depends on OCFS2_FS
|
|
+ default y
|
|
+ help
|
|
+ OCFS2 includes a simple kernelspace clustering package, the OCFS2
|
|
+ Cluster Base. It only requires a very small userspace component
|
|
+ to configure it. This comes with the standard ocfs2-tools package.
|
|
+ O2CB is limited to maintaining a cluster for OCFS2 file systems.
|
|
+ It cannot manage any other cluster applications.
|
|
+
|
|
+ It is always safe to say Y here, as the clustering method is
|
|
+ run-time selectable.
|
|
+
|
|
+config OCFS2_FS_USERSPACE_CLUSTER
|
|
+ tristate "OCFS2 Userspace Clustering"
|
|
+ depends on OCFS2_FS && DLM
|
|
+ default y
|
|
+ help
|
|
+ This option will allow OCFS2 to use userspace clustering services
|
|
+ in conjunction with the DLM in fs/dlm. If you are using a
|
|
+ userspace cluster manager, say Y here.
|
|
+
|
|
+ It is safe to say Y, as the clustering method is run-time
|
|
+ selectable.
|
|
+
|
|
+config OCFS2_FS_STATS
|
|
+ bool "OCFS2 statistics"
|
|
+ depends on OCFS2_FS
|
|
+ default y
|
|
+ help
|
|
+ This option allows some fs statistics to be captured. Enabling
|
|
+ this option may increase the memory consumption.
|
|
+
|
|
+config OCFS2_DEBUG_MASKLOG
|
|
+ bool "OCFS2 logging support"
|
|
+ depends on OCFS2_FS
|
|
+ default y
|
|
+ help
|
|
+ The ocfs2 filesystem has an extensive logging system. The system
|
|
+ allows selection of events to log via files in /sys/o2cb/logmask/.
|
|
+ This option will enlarge your kernel, but it allows debugging of
|
|
+ ocfs2 filesystem issues.
|
|
+
|
|
+config OCFS2_DEBUG_FS
|
|
+ bool "OCFS2 expensive checks"
|
|
+ depends on OCFS2_FS
|
|
+ default n
|
|
+ help
|
|
+ This option will enable expensive consistency checks. Enable
|
|
+ this option for debugging only as it is likely to decrease
|
|
+ performance of the filesystem.
|
|
+
|
|
+endif # BLOCK
|
|
+
|
|
+config DNOTIFY
|
|
+ bool "Dnotify support"
|
|
+ default y
|
|
+ help
|
|
+ Dnotify is a directory-based per-fd file change notification system
|
|
+ that uses signals to communicate events to user-space. There exist
|
|
+ superior alternatives, but some applications may still rely on
|
|
+ dnotify.
|
|
+
|
|
+ If unsure, say Y.
|
|
+
|
|
+config INOTIFY
|
|
+ bool "Inotify file change notification support"
|
|
+ default y
|
|
+ ---help---
|
|
+ Say Y here to enable inotify support. Inotify is a file change
|
|
+ notification system and a replacement for dnotify. Inotify fixes
|
|
+ numerous shortcomings in dnotify and introduces several new features
|
|
+ including multiple file events, one-shot support, and unmount
|
|
+ notification.
|
|
+
|
|
+ For more information, see <file:Documentation/filesystems/inotify.txt>
|
|
+
|
|
+ If unsure, say Y.
|
|
+
|
|
+config INOTIFY_USER
|
|
+ bool "Inotify support for userspace"
|
|
+ depends on INOTIFY
|
|
+ default y
|
|
+ ---help---
|
|
+ Say Y here to enable inotify support for userspace, including the
|
|
+ associated system calls. Inotify allows monitoring of both files and
|
|
+ directories via a single open fd. Events are read from the file
|
|
+ descriptor, which is also select()- and poll()-able.
|
|
+
|
|
+ For more information, see <file:Documentation/filesystems/inotify.txt>
|
|
+
|
|
+ If unsure, say Y.
|
|
+
|
|
+config QUOTA
|
|
+ bool "Quota support"
|
|
+ help
|
|
+ If you say Y here, you will be able to set per user limits for disk
|
|
+ usage (also called disk quotas). Currently, it works for the
|
|
+ ext2, ext3, and reiserfs file system. ext3 also supports journalled
|
|
+ quotas for which you don't need to run quotacheck(8) after an unclean
|
|
+ shutdown.
|
|
+ For further details, read the Quota mini-HOWTO, available from
|
|
+ <http://www.tldp.org/docs.html#howto>, or the documentation provided
|
|
+ with the quota tools. Probably the quota support is only useful for
|
|
+ multi user systems. If unsure, say N.
|
|
+
|
|
+config QUOTA_NETLINK_INTERFACE
|
|
+ bool "Report quota messages through netlink interface"
|
|
+ depends on QUOTA && NET
|
|
+ help
|
|
+ If you say Y here, quota warnings (about exceeding softlimit, reaching
|
|
+ hardlimit, etc.) will be reported through netlink interface. If unsure,
|
|
+ say Y.
|
|
+
|
|
+config PRINT_QUOTA_WARNING
|
|
+ bool "Print quota warnings to console (OBSOLETE)"
|
|
+ depends on QUOTA
|
|
+ default y
|
|
+ help
|
|
+ If you say Y here, quota warnings (about exceeding softlimit, reaching
|
|
+ hardlimit, etc.) will be printed to the process' controlling terminal.
|
|
+ Note that this behavior is currently deprecated and may go away in
|
|
+ future. Please use notification via netlink socket instead.
|
|
+
|
|
+config QFMT_V1
|
|
+ tristate "Old quota format support"
|
|
+ depends on QUOTA
|
|
+ help
|
|
+ This quota format was (is) used by kernels earlier than 2.4.22. If
|
|
+ you have quota working and you don't want to convert to new quota
|
|
+ format say Y here.
|
|
+
|
|
+config QFMT_V2
|
|
+ tristate "Quota format v2 support"
|
|
+ depends on QUOTA
|
|
+ help
|
|
+ This quota format allows using quotas with 32-bit UIDs/GIDs. If you
|
|
+ need this functionality say Y here.
|
|
+
|
|
+config QUOTACTL
|
|
+ bool
|
|
+ depends on XFS_QUOTA || QUOTA
|
|
+ default y
|
|
+
|
|
+config AUTOFS_FS
|
|
+ tristate "Kernel automounter support"
|
|
+ help
|
|
+ The automounter is a tool to automatically mount remote file systems
|
|
+ on demand. This implementation is partially kernel-based to reduce
|
|
+ overhead in the already-mounted case; this is unlike the BSD
|
|
+ automounter (amd), which is a pure user space daemon.
|
|
+
|
|
+ To use the automounter you need the user-space tools from the autofs
|
|
+ package; you can find the location in <file:Documentation/Changes>.
|
|
+ You also want to answer Y to "NFS file system support", below.
|
|
+
|
|
+ If you want to use the newer version of the automounter with more
|
|
+ features, say N here and say Y to "Kernel automounter v4 support",
|
|
+ below.
|
|
+
|
|
+ To compile this support as a module, choose M here: the module will be
|
|
+ called autofs.
|
|
+
|
|
+ If you are not a part of a fairly large, distributed network, you
|
|
+ probably do not need an automounter, and can say N here.
|
|
+
|
|
+config AUTOFS4_FS
|
|
+ tristate "Kernel automounter version 4 support (also supports v3)"
|
|
+ help
|
|
+ The automounter is a tool to automatically mount remote file systems
|
|
+ on demand. This implementation is partially kernel-based to reduce
|
|
+ overhead in the already-mounted case; this is unlike the BSD
|
|
+ automounter (amd), which is a pure user space daemon.
|
|
+
|
|
+ To use the automounter you need the user-space tools from
|
|
+ <ftp://ftp.kernel.org/pub/linux/daemons/autofs/v4/>; you also
|
|
+ want to answer Y to "NFS file system support", below.
|
|
+
|
|
+ To compile this support as a module, choose M here: the module will be
|
|
+ called autofs4. You will need to add "alias autofs autofs4" to your
|
|
+ modules configuration file.
|
|
+
|
|
+ If you are not a part of a fairly large, distributed network or
|
|
+ don't have a laptop which needs to dynamically reconfigure to the
|
|
+ local network, you probably do not need an automounter, and can say
|
|
+ N here.
|
|
+
|
|
+config FUSE_FS
|
|
+ tristate "Filesystem in Userspace support"
|
|
+ help
|
|
+ With FUSE it is possible to implement a fully functional filesystem
|
|
+ in a userspace program.
|
|
+
|
|
+ There's also companion library: libfuse. This library along with
|
|
+ utilities is available from the FUSE homepage:
|
|
+ <http://fuse.sourceforge.net/>
|
|
+
|
|
+ See <file:Documentation/filesystems/fuse.txt> for more information.
|
|
+ See <file:Documentation/Changes> for needed library/utility version.
|
|
+
|
|
+ If you want to develop a userspace FS, or if you want to use
|
|
+ a filesystem based on FUSE, answer Y or M.
|
|
+
|
|
+config GENERIC_ACL
|
|
+ bool
|
|
+ select FS_POSIX_ACL
|
|
+
|
|
+if BLOCK
|
|
+menu "CD-ROM/DVD Filesystems"
|
|
+
|
|
+config ISO9660_FS
|
|
+ tristate "ISO 9660 CDROM file system support"
|
|
+ help
|
|
+ This is the standard file system used on CD-ROMs. It was previously
|
|
+ known as "High Sierra File System" and is called "hsfs" on other
|
|
+ Unix systems. The so-called Rock-Ridge extensions which allow for
|
|
+ long Unix filenames and symbolic links are also supported by this
|
|
+ driver. If you have a CD-ROM drive and want to do more with it than
|
|
+ just listen to audio CDs and watch its LEDs, say Y (and read
|
|
+ <file:Documentation/filesystems/isofs.txt> and the CD-ROM-HOWTO,
|
|
+ available from <http://www.tldp.org/docs.html#howto>), thereby
|
|
+ enlarging your kernel by about 27 KB; otherwise say N.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called isofs.
|
|
+
|
|
+config JOLIET
|
|
+ bool "Microsoft Joliet CDROM extensions"
|
|
+ depends on ISO9660_FS
|
|
+ select NLS
|
|
+ help
|
|
+ Joliet is a Microsoft extension for the ISO 9660 CD-ROM file system
|
|
+ which allows for long filenames in unicode format (unicode is the
|
|
+ new 16 bit character code, successor to ASCII, which encodes the
|
|
+ characters of almost all languages of the world; see
|
|
+ <http://www.unicode.org/> for more information). Say Y here if you
|
|
+ want to be able to read Joliet CD-ROMs under Linux.
|
|
+
|
|
+config ZISOFS
|
|
+ bool "Transparent decompression extension"
|
|
+ depends on ISO9660_FS
|
|
+ select ZLIB_INFLATE
|
|
+ help
|
|
+ This is a Linux-specific extension to RockRidge which lets you store
|
|
+ data in compressed form on a CD-ROM and have it transparently
|
|
+ decompressed when the CD-ROM is accessed. See
|
|
+ <http://www.kernel.org/pub/linux/utils/fs/zisofs/> for the tools
|
|
+ necessary to create such a filesystem. Say Y here if you want to be
|
|
+ able to read such compressed CD-ROMs.
|
|
+
|
|
+config UDF_FS
|
|
+ tristate "UDF file system support"
|
|
+ select CRC_ITU_T
|
|
+ help
|
|
+ This is the new file system used on some CD-ROMs and DVDs. Say Y if
|
|
+ you intend to mount DVD discs or CDRW's written in packet mode, or
|
|
+ if written to by other UDF utilities, such as DirectCD.
|
|
+ Please read <file:Documentation/filesystems/udf.txt>.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called udf.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config UDF_NLS
|
|
+ bool
|
|
+ default y
|
|
+ depends on (UDF_FS=m && NLS) || (UDF_FS=y && NLS=y)
|
|
+
|
|
+endmenu
|
|
+endif # BLOCK
|
|
+
|
|
+if BLOCK
|
|
+menu "DOS/FAT/NT Filesystems"
|
|
+
|
|
+config FAT_FS
|
|
+ tristate
|
|
+ select NLS
|
|
+ help
|
|
+ If you want to use one of the FAT-based file systems (the MS-DOS and
|
|
+ VFAT (Windows 95) file systems), then you must say Y or M here
|
|
+ to include FAT support. You will then be able to mount partitions or
|
|
+ diskettes with FAT-based file systems and transparently access the
|
|
+ files on them, i.e. MSDOS files will look and behave just like all
|
|
+ other Unix files.
|
|
+
|
|
+ This FAT support is not a file system in itself, it only provides
|
|
+ the foundation for the other file systems. You will have to say Y or
|
|
+ M to at least one of "MSDOS fs support" or "VFAT fs support" in
|
|
+ order to make use of it.
|
|
+
|
|
+ Another way to read and write MSDOS floppies and hard drive
|
|
+ partitions from within Linux (but not transparently) is with the
|
|
+ mtools ("man mtools") program suite. You don't need to say Y here in
|
|
+ order to do that.
|
|
+
|
|
+ If you need to move large files on floppies between a DOS and a
|
|
+ Linux box, say Y here, mount the floppy under Linux with an MSDOS
|
|
+ file system and use GNU tar's M option. GNU tar is a program
|
|
+ available for Unix and DOS ("man tar" or "info tar").
|
|
+
|
|
+ The FAT support will enlarge your kernel by about 37 KB. If unsure,
|
|
+ say Y.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be called
|
|
+ fat. Note that if you compile the FAT support as a module, you
|
|
+ cannot compile any of the FAT-based file systems into the kernel
|
|
+ -- they will have to be modules as well.
|
|
+
|
|
+config MSDOS_FS
|
|
+ tristate "MSDOS fs support"
|
|
+ select FAT_FS
|
|
+ help
|
|
+ This allows you to mount MSDOS partitions of your hard drive (unless
|
|
+ they are compressed; to access compressed MSDOS partitions under
|
|
+ Linux, you can either use the DOS emulator DOSEMU, described in the
|
|
+ DOSEMU-HOWTO, available from
|
|
+ <http://www.tldp.org/docs.html#howto>, or try dmsdosfs in
|
|
+ <ftp://ibiblio.org/pub/Linux/system/filesystems/dosfs/>. If you
|
|
+ intend to use dosemu with a non-compressed MSDOS partition, say Y
|
|
+ here) and MSDOS floppies. This means that file access becomes
|
|
+ transparent, i.e. the MSDOS files look and behave just like all
|
|
+ other Unix files.
|
|
+
|
|
+ If you have Windows 95 or Windows NT installed on your MSDOS
|
|
+ partitions, you should use the VFAT file system (say Y to "VFAT fs
|
|
+ support" below), or you will not be able to see the long filenames
|
|
+ generated by Windows 95 / Windows NT.
|
|
+
|
|
+ This option will enlarge your kernel by about 7 KB. If unsure,
|
|
+ answer Y. This will only work if you said Y to "DOS FAT fs support"
|
|
+ as well. To compile this as a module, choose M here: the module will
|
|
+ be called msdos.
|
|
+
|
|
+config VFAT_FS
|
|
+ tristate "VFAT (Windows-95) fs support"
|
|
+ select FAT_FS
|
|
+ help
|
|
+ This option provides support for normal Windows file systems with
|
|
+ long filenames. That includes non-compressed FAT-based file systems
|
|
+ used by Windows 95, Windows 98, Windows NT 4.0, and the Unix
|
|
+ programs from the mtools package.
|
|
+
|
|
+ The VFAT support enlarges your kernel by about 10 KB and it only
|
|
+ works if you said Y to the "DOS FAT fs support" above. Please read
|
|
+ the file <file:Documentation/filesystems/vfat.txt> for details. If
|
|
+ unsure, say Y.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be called
|
|
+ vfat.
|
|
+
|
|
+config FAT_DEFAULT_CODEPAGE
|
|
+ int "Default codepage for FAT"
|
|
+ depends on MSDOS_FS || VFAT_FS
|
|
+ default 437
|
|
+ help
|
|
+ This option should be set to the codepage of your FAT filesystems.
|
|
+ It can be overridden with the "codepage" mount option.
|
|
+ See <file:Documentation/filesystems/vfat.txt> for more information.
|
|
+
|
|
+config FAT_DEFAULT_IOCHARSET
|
|
+ string "Default iocharset for FAT"
|
|
+ depends on VFAT_FS
|
|
+ default "iso8859-1"
|
|
+ help
|
|
+ Set this to the default input/output character set you'd
|
|
+ like FAT to use. It should probably match the character set
|
|
+ that most of your FAT filesystems use, and can be overridden
|
|
+ with the "iocharset" mount option for FAT filesystems.
|
|
+ Note that "utf8" is not recommended for FAT filesystems.
|
|
+ If unsure, you shouldn't set "utf8" here.
|
|
+ See <file:Documentation/filesystems/vfat.txt> for more information.
|
|
+
|
|
+config NTFS_FS
|
|
+ tristate "NTFS file system support"
|
|
+ select NLS
|
|
+ help
|
|
+ NTFS is the file system of Microsoft Windows NT, 2000, XP and 2003.
|
|
+
|
|
+ Saying Y or M here enables read support. There is partial, but
|
|
+ safe, write support available. For write support you must also
|
|
+ say Y to "NTFS write support" below.
|
|
+
|
|
+ There are also a number of user-space tools available, called
|
|
+ ntfsprogs. These include ntfsundelete and ntfsresize, that work
|
|
+ without NTFS support enabled in the kernel.
|
|
+
|
|
+ This is a rewrite from scratch of Linux NTFS support and replaced
|
|
+ the old NTFS code starting with Linux 2.5.11. A backport to
|
|
+ the Linux 2.4 kernel series is separately available as a patch
|
|
+ from the project web site.
|
|
+
|
|
+ For more information see <file:Documentation/filesystems/ntfs.txt>
|
|
+ and <http://www.linux-ntfs.org/>.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called ntfs.
|
|
+
|
|
+ If you are not using Windows NT, 2000, XP or 2003 in addition to
|
|
+ Linux on your computer it is safe to say N.
|
|
+
|
|
+config NTFS_DEBUG
|
|
+ bool "NTFS debugging support"
|
|
+ depends on NTFS_FS
|
|
+ help
|
|
+ If you are experiencing any problems with the NTFS file system, say
|
|
+ Y here. This will result in additional consistency checks to be
|
|
+ performed by the driver as well as additional debugging messages to
|
|
+ be written to the system log. Note that debugging messages are
|
|
+ disabled by default. To enable them, supply the option debug_msgs=1
|
|
+ at the kernel command line when booting the kernel or as an option
|
|
+ to insmod when loading the ntfs module. Once the driver is active,
|
|
+ you can enable debugging messages by doing (as root):
|
|
+ echo 1 > /proc/sys/fs/ntfs-debug
|
|
+ Replacing the "1" with "0" would disable debug messages.
|
|
+
|
|
+ If you leave debugging messages disabled, this results in little
|
|
+ overhead, but enabling debug messages results in very significant
|
|
+ slowdown of the system.
|
|
+
|
|
+ When reporting bugs, please try to have available a full dump of
|
|
+ debugging messages while the misbehaviour was occurring.
|
|
+
|
|
+config NTFS_RW
|
|
+ bool "NTFS write support"
|
|
+ depends on NTFS_FS
|
|
+ help
|
|
+ This enables the partial, but safe, write support in the NTFS driver.
|
|
+
|
|
+ The only supported operation is overwriting existing files, without
|
|
+ changing the file length. No file or directory creation, deletion or
|
|
+ renaming is possible. Note only non-resident files can be written to
|
|
+ so you may find that some very small files (<500 bytes or so) cannot
|
|
+ be written to.
|
|
+
|
|
+ While we cannot guarantee that it will not damage any data, we have
|
|
+ so far not received a single report where the driver would have
|
|
+ damaged someones data so we assume it is perfectly safe to use.
|
|
+
|
|
+ Note: While write support is safe in this version (a rewrite from
|
|
+ scratch of the NTFS support), it should be noted that the old NTFS
|
|
+ write support, included in Linux 2.5.10 and before (since 1997),
|
|
+ is not safe.
|
|
+
|
|
+ This is currently useful with TopologiLinux. TopologiLinux is run
|
|
+ on top of any DOS/Microsoft Windows system without partitioning your
|
|
+ hard disk. Unlike other Linux distributions TopologiLinux does not
|
|
+ need its own partition. For more information see
|
|
+ <http://topologi-linux.sourceforge.net/>
|
|
+
|
|
+ It is perfectly safe to say N here.
|
|
+
|
|
+endmenu
|
|
+endif # BLOCK
|
|
+
|
|
+menu "Pseudo filesystems"
|
|
+
|
|
+source "fs/proc/Kconfig"
|
|
+
|
|
+config SYSFS
|
|
+ bool "sysfs file system support" if EMBEDDED
|
|
+ default y
|
|
+ help
|
|
+ The sysfs filesystem is a virtual filesystem that the kernel uses to
|
|
+ export internal kernel objects, their attributes, and their
|
|
+ relationships to one another.
|
|
+
|
|
+ Users can use sysfs to ascertain useful information about the running
|
|
+ kernel, such as the devices the kernel has discovered on each bus and
|
|
+ which driver each is bound to. sysfs can also be used to tune devices
|
|
+ and other kernel subsystems.
|
|
+
|
|
+ Some system agents rely on the information in sysfs to operate.
|
|
+ /sbin/hotplug uses device and object attributes in sysfs to assist in
|
|
+ delegating policy decisions, like persistently naming devices.
|
|
+
|
|
+ sysfs is currently used by the block subsystem to mount the root
|
|
+ partition. If sysfs is disabled you must specify the boot device on
|
|
+ the kernel boot command line via its major and minor numbers. For
|
|
+ example, "root=03:01" for /dev/hda1.
|
|
+
|
|
+ Designers of embedded systems may wish to say N here to conserve space.
|
|
+
|
|
+config TMPFS
|
|
+ bool "Virtual memory file system support (former shm fs)"
|
|
+ help
|
|
+ Tmpfs is a file system which keeps all files in virtual memory.
|
|
+
|
|
+ Everything in tmpfs is temporary in the sense that no files will be
|
|
+ created on your hard drive. The files live in memory and swap
|
|
+ space. If you unmount a tmpfs instance, everything stored therein is
|
|
+ lost.
|
|
+
|
|
+ See <file:Documentation/filesystems/tmpfs.txt> for details.
|
|
+
|
|
+config TMPFS_POSIX_ACL
|
|
+ bool "Tmpfs POSIX Access Control Lists"
|
|
+ depends on TMPFS
|
|
+ select GENERIC_ACL
|
|
+ help
|
|
+ POSIX Access Control Lists (ACLs) support permissions for users and
|
|
+ groups beyond the owner/group/world scheme.
|
|
+
|
|
+ To learn more about Access Control Lists, visit the POSIX ACLs for
|
|
+ Linux website <http://acl.bestbits.at/>.
|
|
+
|
|
+ If you don't know what Access Control Lists are, say N.
|
|
+
|
|
+config HUGETLBFS
|
|
+ bool "HugeTLB file system support"
|
|
+ depends on X86 || IA64 || PPC64 || SPARC64 || (SUPERH && MMU) || \
|
|
+ (S390 && 64BIT) || BROKEN
|
|
+ help
|
|
+ hugetlbfs is a filesystem backing for HugeTLB pages, based on
|
|
+ ramfs. For architectures that support it, say Y here and read
|
|
+ <file:Documentation/vm/hugetlbpage.txt> for details.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config HUGETLB_PAGE
|
|
+ def_bool HUGETLBFS
|
|
+
|
|
+config CONFIGFS_FS
|
|
+ tristate "Userspace-driven configuration filesystem"
|
|
+ depends on SYSFS
|
|
+ help
|
|
+ configfs is a ram-based filesystem that provides the converse
|
|
+ of sysfs's functionality. Where sysfs is a filesystem-based
|
|
+ view of kernel objects, configfs is a filesystem-based manager
|
|
+ of kernel objects, or config_items.
|
|
+
|
|
+ Both sysfs and configfs can and should exist together on the
|
|
+ same system. One is not a replacement for the other.
|
|
+
|
|
+endmenu
|
|
+
|
|
+menu "Miscellaneous filesystems"
|
|
+
|
|
+config ADFS_FS
|
|
+ tristate "ADFS file system support (EXPERIMENTAL)"
|
|
+ depends on BLOCK && EXPERIMENTAL
|
|
+ help
|
|
+ The Acorn Disc Filing System is the standard file system of the
|
|
+ RiscOS operating system which runs on Acorn's ARM-based Risc PC
|
|
+ systems and the Acorn Archimedes range of machines. If you say Y
|
|
+ here, Linux will be able to read from ADFS partitions on hard drives
|
|
+ and from ADFS-formatted floppy discs. If you also want to be able to
|
|
+ write to those devices, say Y to "ADFS write support" below.
|
|
+
|
|
+ The ADFS partition should be the first partition (i.e.,
|
|
+ /dev/[hs]d?1) on each of your drives. Please read the file
|
|
+ <file:Documentation/filesystems/adfs.txt> for further details.
|
|
+
|
|
+ To compile this code as a module, choose M here: the module will be
|
|
+ called adfs.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config ADFS_FS_RW
|
|
+ bool "ADFS write support (DANGEROUS)"
|
|
+ depends on ADFS_FS
|
|
+ help
|
|
+ If you say Y here, you will be able to write to ADFS partitions on
|
|
+ hard drives and ADFS-formatted floppy disks. This is experimental
|
|
+ codes, so if you're unsure, say N.
|
|
+
|
|
+config AFFS_FS
|
|
+ tristate "Amiga FFS file system support (EXPERIMENTAL)"
|
|
+ depends on BLOCK && EXPERIMENTAL
|
|
+ help
|
|
+ The Fast File System (FFS) is the common file system used on hard
|
|
+ disks by Amiga(tm) systems since AmigaOS Version 1.3 (34.20). Say Y
|
|
+ if you want to be able to read and write files from and to an Amiga
|
|
+ FFS partition on your hard drive. Amiga floppies however cannot be
|
|
+ read with this driver due to an incompatibility of the floppy
|
|
+ controller used in an Amiga and the standard floppy controller in
|
|
+ PCs and workstations. Read <file:Documentation/filesystems/affs.txt>
|
|
+ and <file:fs/affs/Changes>.
|
|
+
|
|
+ With this driver you can also mount disk files used by Bernd
|
|
+ Schmidt's Un*X Amiga Emulator
|
|
+ (<http://www.freiburg.linux.de/~uae/>).
|
|
+ If you want to do this, you will also need to say Y or M to "Loop
|
|
+ device support", above.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called affs. If unsure, say N.
|
|
+
|
|
+config ECRYPT_FS
|
|
+ tristate "eCrypt filesystem layer support (EXPERIMENTAL)"
|
|
+ depends on EXPERIMENTAL && KEYS && CRYPTO && NET
|
|
+ help
|
|
+ Encrypted filesystem that operates on the VFS layer. See
|
|
+ <file:Documentation/filesystems/ecryptfs.txt> to learn more about
|
|
+ eCryptfs. Userspace components are required and can be
|
|
+ obtained from <http://ecryptfs.sf.net>.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called ecryptfs.
|
|
+
|
|
+config HFS_FS
|
|
+ tristate "Apple Macintosh file system support (EXPERIMENTAL)"
|
|
+ depends on BLOCK && EXPERIMENTAL
|
|
+ select NLS
|
|
+ help
|
|
+ If you say Y here, you will be able to mount Macintosh-formatted
|
|
+ floppy disks and hard drive partitions with full read-write access.
|
|
+ Please read <file:Documentation/filesystems/hfs.txt> to learn about
|
|
+ the available mount options.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called hfs.
|
|
+
|
|
+config HFSPLUS_FS
|
|
+ tristate "Apple Extended HFS file system support"
|
|
+ depends on BLOCK
|
|
+ select NLS
|
|
+ select NLS_UTF8
|
|
+ help
|
|
+ If you say Y here, you will be able to mount extended format
|
|
+ Macintosh-formatted hard drive partitions with full read-write access.
|
|
+
|
|
+ This file system is often called HFS+ and was introduced with
|
|
+ MacOS 8. It includes all Mac specific filesystem data such as
|
|
+ data forks and creator codes, but it also has several UNIX
|
|
+ style features such as file ownership and permissions.
|
|
+
|
|
+config BEFS_FS
|
|
+ tristate "BeOS file system (BeFS) support (read only) (EXPERIMENTAL)"
|
|
+ depends on BLOCK && EXPERIMENTAL
|
|
+ select NLS
|
|
+ help
|
|
+ The BeOS File System (BeFS) is the native file system of Be, Inc's
|
|
+ BeOS. Notable features include support for arbitrary attributes
|
|
+ on files and directories, and database-like indices on selected
|
|
+ attributes. (Also note that this driver doesn't make those features
|
|
+ available at this time). It is a 64 bit filesystem, so it supports
|
|
+ extremely large volumes and files.
|
|
+
|
|
+ If you use this filesystem, you should also say Y to at least one
|
|
+ of the NLS (native language support) options below.
|
|
+
|
|
+ If you don't know what this is about, say N.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be
|
|
+ called befs.
|
|
+
|
|
+config BEFS_DEBUG
|
|
+ bool "Debug BeFS"
|
|
+ depends on BEFS_FS
|
|
+ help
|
|
+ If you say Y here, you can use the 'debug' mount option to enable
|
|
+ debugging output from the driver.
|
|
+
|
|
+config BFS_FS
|
|
+ tristate "BFS file system support (EXPERIMENTAL)"
|
|
+ depends on BLOCK && EXPERIMENTAL
|
|
+ help
|
|
+ Boot File System (BFS) is a file system used under SCO UnixWare to
|
|
+ allow the bootloader access to the kernel image and other important
|
|
+ files during the boot process. It is usually mounted under /stand
|
|
+ and corresponds to the slice marked as "STAND" in the UnixWare
|
|
+ partition. You should say Y if you want to read or write the files
|
|
+ on your /stand slice from within Linux. You then also need to say Y
|
|
+ to "UnixWare slices support", below. More information about the BFS
|
|
+ file system is contained in the file
|
|
+ <file:Documentation/filesystems/bfs.txt>.
|
|
+
|
|
+ If you don't know what this is about, say N.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be called
|
|
+ bfs. Note that the file system of your root partition (the one
|
|
+ containing the directory /) cannot be compiled as a module.
|
|
+
|
|
+
|
|
+
|
|
+config EFS_FS
|
|
+ tristate "EFS file system support (read only) (EXPERIMENTAL)"
|
|
+ depends on BLOCK && EXPERIMENTAL
|
|
+ help
|
|
+ EFS is an older file system used for non-ISO9660 CD-ROMs and hard
|
|
+ disk partitions by SGI's IRIX operating system (IRIX 6.0 and newer
|
|
+ uses the XFS file system for hard disk partitions however).
|
|
+
|
|
+ This implementation only offers read-only access. If you don't know
|
|
+ what all this is about, it's safe to say N. For more information
|
|
+ about EFS see its home page at <http://aeschi.ch.eu.org/efs/>.
|
|
+
|
|
+ To compile the EFS file system support as a module, choose M here: the
|
|
+ module will be called efs.
|
|
+
|
|
+config JFFS2_FS
|
|
+ tristate "Journalling Flash File System v2 (JFFS2) support"
|
|
+ select CRC32
|
|
+ depends on MTD
|
|
+ help
|
|
+ JFFS2 is the second generation of the Journalling Flash File System
|
|
+ for use on diskless embedded devices. It provides improved wear
|
|
+ levelling, compression and support for hard links. You cannot use
|
|
+ this on normal block devices, only on 'MTD' devices.
|
|
+
|
|
+ Further information on the design and implementation of JFFS2 is
|
|
+ available at <http://sources.redhat.com/jffs2/>.
|
|
+
|
|
+config JFFS2_FS_DEBUG
|
|
+ int "JFFS2 debugging verbosity (0 = quiet, 2 = noisy)"
|
|
+ depends on JFFS2_FS
|
|
+ default "0"
|
|
+ help
|
|
+ This controls the amount of debugging messages produced by the JFFS2
|
|
+ code. Set it to zero for use in production systems. For evaluation,
|
|
+ testing and debugging, it's advisable to set it to one. This will
|
|
+ enable a few assertions and will print debugging messages at the
|
|
+ KERN_DEBUG loglevel, where they won't normally be visible. Level 2
|
|
+ is unlikely to be useful - it enables extra debugging in certain
|
|
+ areas which at one point needed debugging, but when the bugs were
|
|
+ located and fixed, the detailed messages were relegated to level 2.
|
|
+
|
|
+ If reporting bugs, please try to have available a full dump of the
|
|
+ messages at debug level 1 while the misbehaviour was occurring.
|
|
+
|
|
+config JFFS2_FS_WRITEBUFFER
|
|
+ bool "JFFS2 write-buffering support"
|
|
+ depends on JFFS2_FS
|
|
+ default y
|
|
+ help
|
|
+ This enables the write-buffering support in JFFS2.
|
|
+
|
|
+ This functionality is required to support JFFS2 on the following
|
|
+ types of flash devices:
|
|
+ - NAND flash
|
|
+ - NOR flash with transparent ECC
|
|
+ - DataFlash
|
|
+
|
|
+config JFFS2_FS_WBUF_VERIFY
|
|
+ bool "Verify JFFS2 write-buffer reads"
|
|
+ depends on JFFS2_FS_WRITEBUFFER
|
|
+ default n
|
|
+ help
|
|
+ This causes JFFS2 to read back every page written through the
|
|
+ write-buffer, and check for errors.
|
|
+
|
|
+config JFFS2_SUMMARY
|
|
+ bool "JFFS2 summary support (EXPERIMENTAL)"
|
|
+ depends on JFFS2_FS && EXPERIMENTAL
|
|
+ default n
|
|
+ help
|
|
+ This feature makes it possible to use summary information
|
|
+ for faster filesystem mount.
|
|
+
|
|
+ The summary information can be inserted into a filesystem image
|
|
+ by the utility 'sumtool'.
|
|
+
|
|
+ If unsure, say 'N'.
|
|
+
|
|
+config JFFS2_FS_XATTR
|
|
+ bool "JFFS2 XATTR support (EXPERIMENTAL)"
|
|
+ depends on JFFS2_FS && EXPERIMENTAL
|
|
+ default n
|
|
+ help
|
|
+ Extended attributes are name:value pairs associated with inodes by
|
|
+ the kernel or by users (see the attr(5) manual page, or visit
|
|
+ <http://acl.bestbits.at/> for details).
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config JFFS2_FS_POSIX_ACL
|
|
+ bool "JFFS2 POSIX Access Control Lists"
|
|
+ depends on JFFS2_FS_XATTR
|
|
+ default y
|
|
+ select FS_POSIX_ACL
|
|
+ help
|
|
+ Posix Access Control Lists (ACLs) support permissions for users and
|
|
+ groups beyond the owner/group/world scheme.
|
|
+
|
|
+ To learn more about Access Control Lists, visit the Posix ACLs for
|
|
+ Linux website <http://acl.bestbits.at/>.
|
|
+
|
|
+ If you don't know what Access Control Lists are, say N
|
|
+
|
|
+config JFFS2_FS_SECURITY
|
|
+ bool "JFFS2 Security Labels"
|
|
+ depends on JFFS2_FS_XATTR
|
|
+ default y
|
|
+ help
|
|
+ Security labels support alternative access control models
|
|
+ implemented by security modules like SELinux. This option
|
|
+ enables an extended attribute handler for file security
|
|
+ labels in the jffs2 filesystem.
|
|
+
|
|
+ If you are not using a security module that requires using
|
|
+ extended attributes for file security labels, say N.
|
|
+
|
|
+config JFFS2_COMPRESSION_OPTIONS
|
|
+ bool "Advanced compression options for JFFS2"
|
|
+ depends on JFFS2_FS
|
|
+ default n
|
|
+ help
|
|
+ Enabling this option allows you to explicitly choose which
|
|
+ compression modules, if any, are enabled in JFFS2. Removing
|
|
+ compressors can mean you cannot read existing file systems,
|
|
+ and enabling experimental compressors can mean that you
|
|
+ write a file system which cannot be read by a standard kernel.
|
|
+
|
|
+ If unsure, you should _definitely_ say 'N'.
|
|
+
|
|
+config JFFS2_ZLIB
|
|
+ bool "JFFS2 ZLIB compression support" if JFFS2_COMPRESSION_OPTIONS
|
|
+ select ZLIB_INFLATE
|
|
+ select ZLIB_DEFLATE
|
|
+ depends on JFFS2_FS
|
|
+ default y
|
|
+ help
|
|
+ Zlib is designed to be a free, general-purpose, legally unencumbered,
|
|
+ lossless data-compression library for use on virtually any computer
|
|
+ hardware and operating system. See <http://www.gzip.org/zlib/> for
|
|
+ further information.
|
|
+
|
|
+ Say 'Y' if unsure.
|
|
+
|
|
+config JFFS2_LZO
|
|
+ bool "JFFS2 LZO compression support" if JFFS2_COMPRESSION_OPTIONS
|
|
+ select LZO_COMPRESS
|
|
+ select LZO_DECOMPRESS
|
|
+ depends on JFFS2_FS
|
|
+ default n
|
|
+ help
|
|
+ minilzo-based compression. Generally works better than Zlib.
|
|
+
|
|
+ This feature was added in July, 2007. Say 'N' if you need
|
|
+ compatibility with older bootloaders or kernels.
|
|
+
|
|
+config JFFS2_RTIME
|
|
+ bool "JFFS2 RTIME compression support" if JFFS2_COMPRESSION_OPTIONS
|
|
+ depends on JFFS2_FS
|
|
+ default y
|
|
+ help
|
|
+ Rtime does manage to recompress already-compressed data. Say 'Y' if unsure.
|
|
+
|
|
+config JFFS2_RUBIN
|
|
+ bool "JFFS2 RUBIN compression support" if JFFS2_COMPRESSION_OPTIONS
|
|
+ depends on JFFS2_FS
|
|
+ default n
|
|
+ help
|
|
+ RUBINMIPS and DYNRUBIN compressors. Say 'N' if unsure.
|
|
+
|
|
+choice
|
|
+ prompt "JFFS2 default compression mode" if JFFS2_COMPRESSION_OPTIONS
|
|
+ default JFFS2_CMODE_PRIORITY
|
|
+ depends on JFFS2_FS
|
|
+ help
|
|
+ You can set here the default compression mode of JFFS2 from
|
|
+ the available compression modes. Don't touch if unsure.
|
|
+
|
|
+config JFFS2_CMODE_NONE
|
|
+ bool "no compression"
|
|
+ help
|
|
+ Uses no compression.
|
|
+
|
|
+config JFFS2_CMODE_PRIORITY
|
|
+ bool "priority"
|
|
+ help
|
|
+ Tries the compressors in a predefined order and chooses the first
|
|
+ successful one.
|
|
+
|
|
+config JFFS2_CMODE_SIZE
|
|
+ bool "size (EXPERIMENTAL)"
|
|
+ help
|
|
+ Tries all compressors and chooses the one which has the smallest
|
|
+ result.
|
|
+
|
|
+config JFFS2_CMODE_FAVOURLZO
|
|
+ bool "Favour LZO"
|
|
+ help
|
|
+ Tries all compressors and chooses the one which has the smallest
|
|
+ result but gives some preference to LZO (which has faster
|
|
+ decompression) at the expense of size.
|
|
+
|
|
+endchoice
|
|
+
|
|
+# UBIFS File system configuration
|
|
+source "fs/ubifs/Kconfig"
|
|
+
|
|
+config CRAMFS
|
|
+ tristate "Compressed ROM file system support (cramfs)"
|
|
+ depends on BLOCK
|
|
+ select ZLIB_INFLATE
|
|
+ help
|
|
+ Saying Y here includes support for CramFs (Compressed ROM File
|
|
+ System). CramFs is designed to be a simple, small, and compressed
|
|
+ file system for ROM based embedded systems. CramFs is read-only,
|
|
+ limited to 256MB file systems (with 16MB files), and doesn't support
|
|
+ 16/32 bits uid/gid, hard links and timestamps.
|
|
+
|
|
+ See <file:Documentation/filesystems/cramfs.txt> and
|
|
+ <file:fs/cramfs/README> for further information.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be called
|
|
+ cramfs. Note that the root file system (the one containing the
|
|
+ directory /) cannot be compiled as a module.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config VXFS_FS
|
|
+ tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
|
|
+ depends on BLOCK
|
|
+ help
|
|
+ FreeVxFS is a file system driver that support the VERITAS VxFS(TM)
|
|
+ file system format. VERITAS VxFS(TM) is the standard file system
|
|
+ of SCO UnixWare (and possibly others) and optionally available
|
|
+ for Sunsoft Solaris, HP-UX and many other operating systems.
|
|
+ Currently only readonly access is supported.
|
|
+
|
|
+ NOTE: the file system type as used by mount(1), mount(2) and
|
|
+ fstab(5) is 'vxfs' as it describes the file system format, not
|
|
+ the actual driver.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be
|
|
+ called freevxfs. If unsure, say N.
|
|
+
|
|
+config MINIX_FS
|
|
+ tristate "Minix file system support"
|
|
+ depends on BLOCK
|
|
+ help
|
|
+ Minix is a simple operating system used in many classes about OS's.
|
|
+ The minix file system (method to organize files on a hard disk
|
|
+ partition or a floppy disk) was the original file system for Linux,
|
|
+ but has been superseded by the second extended file system ext2fs.
|
|
+ You don't want to use the minix file system on your hard disk
|
|
+ because of certain built-in restrictions, but it is sometimes found
|
|
+ on older Linux floppy disks. This option will enlarge your kernel
|
|
+ by about 28 KB. If unsure, say N.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called minix. Note that the file system of your root
|
|
+ partition (the one containing the directory /) cannot be compiled as
|
|
+ a module.
|
|
+
|
|
+config OMFS_FS
|
|
+ tristate "SonicBlue Optimized MPEG File System support"
|
|
+ depends on BLOCK
|
|
+ select CRC_ITU_T
|
|
+ help
|
|
+ This is the proprietary file system used by the Rio Karma music
|
|
+ player and ReplayTV DVR. Despite the name, this filesystem is not
|
|
+ more efficient than a standard FS for MPEG files, in fact likely
|
|
+ the opposite is true. Say Y if you have either of these devices
|
|
+ and wish to mount its disk.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called omfs. If unsure, say N.
|
|
+
|
|
+config HPFS_FS
|
|
+ tristate "OS/2 HPFS file system support"
|
|
+ depends on BLOCK
|
|
+ help
|
|
+ OS/2 is IBM's operating system for PC's, the same as Warp, and HPFS
|
|
+ is the file system used for organizing files on OS/2 hard disk
|
|
+ partitions. Say Y if you want to be able to read files from and
|
|
+ write files to an OS/2 HPFS partition on your hard drive. OS/2
|
|
+ floppies however are in regular MSDOS format, so you don't need this
|
|
+ option in order to be able to read them. Read
|
|
+ <file:Documentation/filesystems/hpfs.txt>.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called hpfs. If unsure, say N.
|
|
+
|
|
+
|
|
+config QNX4FS_FS
|
|
+ tristate "QNX4 file system support (read only)"
|
|
+ depends on BLOCK
|
|
+ help
|
|
+ This is the file system used by the real-time operating systems
|
|
+ QNX 4 and QNX 6 (the latter is also called QNX RTP).
|
|
+ Further information is available at <http://www.qnx.com/>.
|
|
+ Say Y if you intend to mount QNX hard disks or floppies.
|
|
+ Unless you say Y to "QNX4FS read-write support" below, you will
|
|
+ only be able to read these file systems.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called qnx4.
|
|
+
|
|
+ If you don't know whether you need it, then you don't need it:
|
|
+ answer N.
|
|
+
|
|
+config QNX4FS_RW
|
|
+ bool "QNX4FS write support (DANGEROUS)"
|
|
+ depends on QNX4FS_FS && EXPERIMENTAL && BROKEN
|
|
+ help
|
|
+ Say Y if you want to test write support for QNX4 file systems.
|
|
+
|
|
+ It's currently broken, so for now:
|
|
+ answer N.
|
|
+
|
|
+config ROMFS_FS
|
|
+ tristate "ROM file system support"
|
|
+ depends on BLOCK
|
|
+ ---help---
|
|
+ This is a very small read-only file system mainly intended for
|
|
+ initial ram disks of installation disks, but it could be used for
|
|
+ other read-only media as well. Read
|
|
+ <file:Documentation/filesystems/romfs.txt> for details.
|
|
+
|
|
+ To compile this file system support as a module, choose M here: the
|
|
+ module will be called romfs. Note that the file system of your
|
|
+ root partition (the one containing the directory /) cannot be a
|
|
+ module.
|
|
+
|
|
+ If you don't know whether you need it, then you don't need it:
|
|
+ answer N.
|
|
+
|
|
+
|
|
+config SYSV_FS
|
|
+ tristate "System V/Xenix/V7/Coherent file system support"
|
|
+ depends on BLOCK
|
|
+ help
|
|
+ SCO, Xenix and Coherent are commercial Unix systems for Intel
|
|
+ machines, and Version 7 was used on the DEC PDP-11. Saying Y
|
|
+ here would allow you to read from their floppies and hard disk
|
|
+ partitions.
|
|
+
|
|
+ If you have floppies or hard disk partitions like that, it is likely
|
|
+ that they contain binaries from those other Unix systems; in order
|
|
+ to run these binaries, you will want to install linux-abi which is
|
|
+ a set of kernel modules that lets you run SCO, Xenix, Wyse,
|
|
+ UnixWare, Dell Unix and System V programs under Linux. It is
|
|
+ available via FTP (user: ftp) from
|
|
+ <ftp://ftp.openlinux.org/pub/people/hch/linux-abi/>).
|
|
+ NOTE: that will work only for binaries from Intel-based systems;
|
|
+ PDP ones will have to wait until somebody ports Linux to -11 ;-)
|
|
+
|
|
+ If you only intend to mount files from some other Unix over the
|
|
+ network using NFS, you don't need the System V file system support
|
|
+ (but you need NFS file system support obviously).
|
|
+
|
|
+ Note that this option is generally not needed for floppies, since a
|
|
+ good portable way to transport files and directories between unixes
|
|
+ (and even other operating systems) is given by the tar program ("man
|
|
+ tar" or preferably "info tar"). Note also that this option has
|
|
+ nothing whatsoever to do with the option "System V IPC". Read about
|
|
+ the System V file system in
|
|
+ <file:Documentation/filesystems/sysv-fs.txt>.
|
|
+ Saying Y here will enlarge your kernel by about 27 KB.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be called
|
|
+ sysv.
|
|
+
|
|
+ If you haven't heard about all of this before, it's safe to say N.
|
|
+
|
|
+
|
|
+config UFS_FS
|
|
+ tristate "UFS file system support (read only)"
|
|
+ depends on BLOCK
|
|
+ help
|
|
+ BSD and derivate versions of Unix (such as SunOS, FreeBSD, NetBSD,
|
|
+ OpenBSD and NeXTstep) use a file system called UFS. Some System V
|
|
+ Unixes can create and mount hard disk partitions and diskettes using
|
|
+ this file system as well. Saying Y here will allow you to read from
|
|
+ these partitions; if you also want to write to them, say Y to the
|
|
+ experimental "UFS file system write support", below. Please read the
|
|
+ file <file:Documentation/filesystems/ufs.txt> for more information.
|
|
+
|
|
+ The recently released UFS2 variant (used in FreeBSD 5.x) is
|
|
+ READ-ONLY supported.
|
|
+
|
|
+ Note that this option is generally not needed for floppies, since a
|
|
+ good portable way to transport files and directories between unixes
|
|
+ (and even other operating systems) is given by the tar program ("man
|
|
+ tar" or preferably "info tar").
|
|
+
|
|
+ When accessing NeXTstep files, you may need to convert them from the
|
|
+ NeXT character set to the Latin1 character set; use the program
|
|
+ recode ("info recode") for this purpose.
|
|
+
|
|
+ To compile the UFS file system support as a module, choose M here: the
|
|
+ module will be called ufs.
|
|
+
|
|
+ If you haven't heard about all of this before, it's safe to say N.
|
|
+
|
|
+config UFS_FS_WRITE
|
|
+ bool "UFS file system write support (DANGEROUS)"
|
|
+ depends on UFS_FS && EXPERIMENTAL
|
|
+ help
|
|
+ Say Y here if you want to try writing to UFS partitions. This is
|
|
+ experimental, so you should back up your UFS partitions beforehand.
|
|
+
|
|
+config UFS_DEBUG
|
|
+ bool "UFS debugging"
|
|
+ depends on UFS_FS
|
|
+ help
|
|
+ If you are experiencing any problems with the UFS filesystem, say
|
|
+ Y here. This will result in _many_ additional debugging messages to be
|
|
+ written to the system log.
|
|
+
|
|
+endmenu
|
|
+
|
|
+menuconfig NETWORK_FILESYSTEMS
|
|
+ bool "Network File Systems"
|
|
+ default y
|
|
+ depends on NET
|
|
+ ---help---
|
|
+ Say Y here to get to see options for network filesystems and
|
|
+ filesystem-related networking code, such as NFS daemon and
|
|
+ RPCSEC security modules.
|
|
+
|
|
+ This option alone does not add any kernel code.
|
|
+
|
|
+ If you say N, all options in this submenu will be skipped and
|
|
+ disabled; if unsure, say Y here.
|
|
+
|
|
+if NETWORK_FILESYSTEMS
|
|
+
|
|
+config NFS_FS
|
|
+ tristate "NFS client support"
|
|
+ depends on INET
|
|
+ select LOCKD
|
|
+ select SUNRPC
|
|
+ select NFS_ACL_SUPPORT if NFS_V3_ACL
|
|
+ help
|
|
+ Choose Y here if you want to access files residing on other
|
|
+ computers using Sun's Network File System protocol. To compile
|
|
+ this file system support as a module, choose M here: the module
|
|
+ will be called nfs.
|
|
+
|
|
+ To mount file systems exported by NFS servers, you also need to
|
|
+ install the user space mount.nfs command which can be found in
|
|
+ the Linux nfs-utils package, available from http://linux-nfs.org/.
|
|
+ Information about using the mount command is available in the
|
|
+ mount(8) man page. More detail about the Linux NFS client
|
|
+ implementation is available via the nfs(5) man page.
|
|
+
|
|
+ Below you can choose which versions of the NFS protocol are
|
|
+ available in the kernel to mount NFS servers. Support for NFS
|
|
+ version 2 (RFC 1094) is always available when NFS_FS is selected.
|
|
+
|
|
+ To configure a system which mounts its root file system via NFS
|
|
+ at boot time, say Y here, select "Kernel level IP
|
|
+ autoconfiguration" in the NETWORK menu, and select "Root file
|
|
+ system on NFS" below. You cannot compile this file system as a
|
|
+ module in this case.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config NFS_V3
|
|
+ bool "NFS client support for NFS version 3"
|
|
+ depends on NFS_FS
|
|
+ help
|
|
+ This option enables support for version 3 of the NFS protocol
|
|
+ (RFC 1813) in the kernel's NFS client.
|
|
+
|
|
+ If unsure, say Y.
|
|
+
|
|
+config NFS_V3_ACL
|
|
+ bool "NFS client support for the NFSv3 ACL protocol extension"
|
|
+ depends on NFS_V3
|
|
+ help
|
|
+ Some NFS servers support an auxiliary NFSv3 ACL protocol that
|
|
+ Sun added to Solaris but never became an official part of the
|
|
+ NFS version 3 protocol. This protocol extension allows
|
|
+ applications on NFS clients to manipulate POSIX Access Control
|
|
+ Lists on files residing on NFS servers. NFS servers enforce
|
|
+ ACLs on local files whether this protocol is available or not.
|
|
+
|
|
+ Choose Y here if your NFS server supports the Solaris NFSv3 ACL
|
|
+ protocol extension and you want your NFS client to allow
|
|
+ applications to access and modify ACLs on files on the server.
|
|
+
|
|
+ Most NFS servers don't support the Solaris NFSv3 ACL protocol
|
|
+ extension. You can choose N here or specify the "noacl" mount
|
|
+ option to prevent your NFS client from trying to use the NFSv3
|
|
+ ACL protocol.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config NFS_V4
|
|
+ bool "NFS client support for NFS version 4 (EXPERIMENTAL)"
|
|
+ depends on NFS_FS && EXPERIMENTAL
|
|
+ select RPCSEC_GSS_KRB5
|
|
+ help
|
|
+ This option enables support for version 4 of the NFS protocol
|
|
+ (RFC 3530) in the kernel's NFS client.
|
|
+
|
|
+ To mount NFS servers using NFSv4, you also need to install user
|
|
+ space programs which can be found in the Linux nfs-utils package,
|
|
+ available from http://linux-nfs.org/.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config ROOT_NFS
|
|
+ bool "Root file system on NFS"
|
|
+ depends on NFS_FS=y && IP_PNP
|
|
+ help
|
|
+ If you want your system to mount its root file system via NFS,
|
|
+ choose Y here. This is common practice for managing systems
|
|
+ without local permanent storage. For details, read
|
|
+ <file:Documentation/filesystems/nfsroot.txt>.
|
|
+
|
|
+ Most people say N here.
|
|
+
|
|
+config NFSD
|
|
+ tristate "NFS server support"
|
|
+ depends on INET
|
|
+ select LOCKD
|
|
+ select SUNRPC
|
|
+ select EXPORTFS
|
|
+ select NFS_ACL_SUPPORT if NFSD_V2_ACL
|
|
+ help
|
|
+ Choose Y here if you want to allow other computers to access
|
|
+ files residing on this system using Sun's Network File System
|
|
+ protocol. To compile the NFS server support as a module,
|
|
+ choose M here: the module will be called nfsd.
|
|
+
|
|
+ You may choose to use a user-space NFS server instead, in which
|
|
+ case you can choose N here.
|
|
+
|
|
+ To export local file systems using NFS, you also need to install
|
|
+ user space programs which can be found in the Linux nfs-utils
|
|
+ package, available from http://linux-nfs.org/. More detail about
|
|
+ the Linux NFS server implementation is available via the
|
|
+ exports(5) man page.
|
|
+
|
|
+ Below you can choose which versions of the NFS protocol are
|
|
+ available to clients mounting the NFS server on this system.
|
|
+ Support for NFS version 2 (RFC 1094) is always available when
|
|
+ CONFIG_NFSD is selected.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config NFSD_V2_ACL
|
|
+ bool
|
|
+ depends on NFSD
|
|
+
|
|
+config NFSD_V3
|
|
+ bool "NFS server support for NFS version 3"
|
|
+ depends on NFSD
|
|
+ help
|
|
+ This option enables support in your system's NFS server for
|
|
+ version 3 of the NFS protocol (RFC 1813).
|
|
+
|
|
+ If unsure, say Y.
|
|
+
|
|
+config NFSD_V3_ACL
|
|
+ bool "NFS server support for the NFSv3 ACL protocol extension"
|
|
+ depends on NFSD_V3
|
|
+ select NFSD_V2_ACL
|
|
+ help
|
|
+ Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
|
|
+ never became an official part of the NFS version 3 protocol.
|
|
+ This protocol extension allows applications on NFS clients to
|
|
+ manipulate POSIX Access Control Lists on files residing on NFS
|
|
+ servers. NFS servers enforce POSIX ACLs on local files whether
|
|
+ this protocol is available or not.
|
|
+
|
|
+ This option enables support in your system's NFS server for the
|
|
+ NFSv3 ACL protocol extension allowing NFS clients to manipulate
|
|
+ POSIX ACLs on files exported by your system's NFS server. NFS
|
|
+ clients which support the Solaris NFSv3 ACL protocol can then
|
|
+ access and modify ACLs on your NFS server.
|
|
+
|
|
+ To store ACLs on your NFS server, you also need to enable ACL-
|
|
+ related CONFIG options for your local file systems of choice.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config NFSD_V4
|
|
+ bool "NFS server support for NFS version 4 (EXPERIMENTAL)"
|
|
+ depends on NFSD && PROC_FS && EXPERIMENTAL
|
|
+ select NFSD_V3
|
|
+ select FS_POSIX_ACL
|
|
+ select RPCSEC_GSS_KRB5
|
|
+ help
|
|
+ This option enables support in your system's NFS server for
|
|
+ version 4 of the NFS protocol (RFC 3530).
|
|
+
|
|
+ To export files using NFSv4, you need to install additional user
|
|
+ space programs which can be found in the Linux nfs-utils package,
|
|
+ available from http://linux-nfs.org/.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config LOCKD
|
|
+ tristate
|
|
+
|
|
+config LOCKD_V4
|
|
+ bool
|
|
+ depends on NFSD_V3 || NFS_V3
|
|
+ default y
|
|
+
|
|
+config EXPORTFS
|
|
+ tristate
|
|
+
|
|
+config NFS_ACL_SUPPORT
|
|
+ tristate
|
|
+ select FS_POSIX_ACL
|
|
+
|
|
+config NFS_COMMON
|
|
+ bool
|
|
+ depends on NFSD || NFS_FS
|
|
+ default y
|
|
+
|
|
+config SUNRPC
|
|
+ tristate
|
|
+
|
|
+config SUNRPC_GSS
|
|
+ tristate
|
|
+
|
|
+config SUNRPC_XPRT_RDMA
|
|
+ tristate
|
|
+ depends on SUNRPC && INFINIBAND && EXPERIMENTAL
|
|
+ default SUNRPC && INFINIBAND
|
|
+ help
|
|
+ This option enables an RPC client transport capability that
|
|
+ allows the NFS client to mount servers via an RDMA-enabled
|
|
+ transport.
|
|
+
|
|
+ To compile RPC client RDMA transport support as a module,
|
|
+ choose M here: the module will be called xprtrdma.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config RPCSEC_GSS_KRB5
|
|
+ tristate "Secure RPC: Kerberos V mechanism (EXPERIMENTAL)"
|
|
+ depends on SUNRPC && EXPERIMENTAL
|
|
+ select SUNRPC_GSS
|
|
+ select CRYPTO
|
|
+ select CRYPTO_MD5
|
|
+ select CRYPTO_DES
|
|
+ select CRYPTO_CBC
|
|
+ help
|
|
+ Choose Y here to enable Secure RPC using the Kerberos version 5
|
|
+ GSS-API mechanism (RFC 1964).
|
|
+
|
|
+ Secure RPC calls with Kerberos require an auxiliary user-space
|
|
+ daemon which may be found in the Linux nfs-utils package
|
|
+ available from http://linux-nfs.org/. In addition, user-space
|
|
+ Kerberos support should be installed.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config RPCSEC_GSS_SPKM3
|
|
+ tristate "Secure RPC: SPKM3 mechanism (EXPERIMENTAL)"
|
|
+ depends on SUNRPC && EXPERIMENTAL
|
|
+ select SUNRPC_GSS
|
|
+ select CRYPTO
|
|
+ select CRYPTO_MD5
|
|
+ select CRYPTO_DES
|
|
+ select CRYPTO_CAST5
|
|
+ select CRYPTO_CBC
|
|
+ help
|
|
+ Choose Y here to enable Secure RPC using the SPKM3 public key
|
|
+ GSS-API mechansim (RFC 2025).
|
|
+
|
|
+ Secure RPC calls with SPKM3 require an auxiliary userspace
|
|
+ daemon which may be found in the Linux nfs-utils package
|
|
+ available from http://linux-nfs.org/.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config SMB_FS
|
|
+ tristate "SMB file system support (OBSOLETE, please use CIFS)"
|
|
+ depends on INET
|
|
+ select NLS
|
|
+ help
|
|
+ SMB (Server Message Block) is the protocol Windows for Workgroups
|
|
+ (WfW), Windows 95/98, Windows NT and OS/2 Lan Manager use to share
|
|
+ files and printers over local networks. Saying Y here allows you to
|
|
+ mount their file systems (often called "shares" in this context) and
|
|
+ access them just like any other Unix directory. Currently, this
|
|
+ works only if the Windows machines use TCP/IP as the underlying
|
|
+ transport protocol, and not NetBEUI. For details, read
|
|
+ <file:Documentation/filesystems/smbfs.txt> and the SMB-HOWTO,
|
|
+ available from <http://www.tldp.org/docs.html#howto>.
|
|
+
|
|
+ Note: if you just want your box to act as an SMB *server* and make
|
|
+ files and printing services available to Windows clients (which need
|
|
+ to have a TCP/IP stack), you don't need to say Y here; you can use
|
|
+ the program SAMBA (available from <ftp://ftp.samba.org/pub/samba/>)
|
|
+ for that.
|
|
+
|
|
+ General information about how to connect Linux, Windows machines and
|
|
+ Macs is on the WWW at <http://www.eats.com/linux_mac_win.html>.
|
|
+
|
|
+ To compile the SMB support as a module, choose M here:
|
|
+ the module will be called smbfs. Most people say N, however.
|
|
+
|
|
+config SMB_NLS_DEFAULT
|
|
+ bool "Use a default NLS"
|
|
+ depends on SMB_FS
|
|
+ help
|
|
+ Enabling this will make smbfs use nls translations by default. You
|
|
+ need to specify the local charset (CONFIG_NLS_DEFAULT) in the nls
|
|
+ settings and you need to give the default nls for the SMB server as
|
|
+ CONFIG_SMB_NLS_REMOTE.
|
|
+
|
|
+ The nls settings can be changed at mount time, if your smbmount
|
|
+ supports that, using the codepage and iocharset parameters.
|
|
+
|
|
+ smbmount from samba 2.2.0 or later supports this.
|
|
+
|
|
+config SMB_NLS_REMOTE
|
|
+ string "Default Remote NLS Option"
|
|
+ depends on SMB_NLS_DEFAULT
|
|
+ default "cp437"
|
|
+ help
|
|
+ This setting allows you to specify a default value for which
|
|
+ codepage the server uses. If this field is left blank no
|
|
+ translations will be done by default. The local codepage/charset
|
|
+ default to CONFIG_NLS_DEFAULT.
|
|
+
|
|
+ The nls settings can be changed at mount time, if your smbmount
|
|
+ supports that, using the codepage and iocharset parameters.
|
|
+
|
|
+ smbmount from samba 2.2.0 or later supports this.
|
|
+
|
|
+config CIFS
|
|
+ tristate "CIFS support (advanced network filesystem, SMBFS successor)"
|
|
+ depends on INET
|
|
+ select NLS
|
|
+ help
|
|
+ This is the client VFS module for the Common Internet File System
|
|
+ (CIFS) protocol which is the successor to the Server Message Block
|
|
+ (SMB) protocol, the native file sharing mechanism for most early
|
|
+ PC operating systems. The CIFS protocol is fully supported by
|
|
+ file servers such as Windows 2000 (including Windows 2003, NT 4
|
|
+ and Windows XP) as well by Samba (which provides excellent CIFS
|
|
+ server support for Linux and many other operating systems). Limited
|
|
+ support for OS/2 and Windows ME and similar servers is provided as
|
|
+ well.
|
|
+
|
|
+ The cifs module provides an advanced network file system
|
|
+ client for mounting to CIFS compliant servers. It includes
|
|
+ support for DFS (hierarchical name space), secure per-user
|
|
+ session establishment via Kerberos or NTLM or NTLMv2,
|
|
+ safe distributed caching (oplock), optional packet
|
|
+ signing, Unicode and other internationalization improvements.
|
|
+ If you need to mount to Samba or Windows from this machine, say Y.
|
|
+
|
|
+config CIFS_STATS
|
|
+ bool "CIFS statistics"
|
|
+ depends on CIFS
|
|
+ help
|
|
+ Enabling this option will cause statistics for each server share
|
|
+ mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
|
|
+
|
|
+config CIFS_STATS2
|
|
+ bool "Extended statistics"
|
|
+ depends on CIFS_STATS
|
|
+ help
|
|
+ Enabling this option will allow more detailed statistics on SMB
|
|
+ request timing to be displayed in /proc/fs/cifs/DebugData and also
|
|
+ allow optional logging of slow responses to dmesg (depending on the
|
|
+ value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
|
|
+ These additional statistics may have a minor effect on performance
|
|
+ and memory utilization.
|
|
+
|
|
+ Unless you are a developer or are doing network performance analysis
|
|
+ or tuning, say N.
|
|
+
|
|
+config CIFS_WEAK_PW_HASH
|
|
+ bool "Support legacy servers which use weaker LANMAN security"
|
|
+ depends on CIFS
|
|
+ help
|
|
+ Modern CIFS servers including Samba and most Windows versions
|
|
+ (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
|
|
+ security mechanisms. These hash the password more securely
|
|
+ than the mechanisms used in the older LANMAN version of the
|
|
+ SMB protocol but LANMAN based authentication is needed to
|
|
+ establish sessions with some old SMB servers.
|
|
+
|
|
+ Enabling this option allows the cifs module to mount to older
|
|
+ LANMAN based servers such as OS/2 and Windows 95, but such
|
|
+ mounts may be less secure than mounts using NTLM or more recent
|
|
+ security mechanisms if you are on a public network. Unless you
|
|
+ have a need to access old SMB servers (and are on a private
|
|
+ network) you probably want to say N. Even if this support
|
|
+ is enabled in the kernel build, LANMAN authentication will not be
|
|
+ used automatically. At runtime LANMAN mounts are disabled but
|
|
+ can be set to required (or optional) either in
|
|
+ /proc/fs/cifs (see fs/cifs/README for more detail) or via an
|
|
+ option on the mount command. This support is disabled by
|
|
+ default in order to reduce the possibility of a downgrade
|
|
+ attack.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config CIFS_XATTR
|
|
+ bool "CIFS extended attributes"
|
|
+ depends on CIFS
|
|
+ help
|
|
+ Extended attributes are name:value pairs associated with inodes by
|
|
+ the kernel or by users (see the attr(5) manual page, or visit
|
|
+ <http://acl.bestbits.at/> for details). CIFS maps the name of
|
|
+ extended attributes beginning with the user namespace prefix
|
|
+ to SMB/CIFS EAs. EAs are stored on Windows servers without the
|
|
+ user namespace prefix, but their names are seen by Linux cifs clients
|
|
+ prefaced by the user namespace prefix. The system namespace
|
|
+ (used by some filesystems to store ACLs) is not supported at
|
|
+ this time.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config CIFS_POSIX
|
|
+ bool "CIFS POSIX Extensions"
|
|
+ depends on CIFS_XATTR
|
|
+ help
|
|
+ Enabling this option will cause the cifs client to attempt to
|
|
+ negotiate a newer dialect with servers, such as Samba 3.0.5
|
|
+ or later, that optionally can handle more POSIX like (rather
|
|
+ than Windows like) file behavior. It also enables
|
|
+ support for POSIX ACLs (getfacl and setfacl) to servers
|
|
+ (such as Samba 3.10 and later) which can negotiate
|
|
+ CIFS POSIX ACL support. If unsure, say N.
|
|
+
|
|
+config CIFS_DEBUG2
|
|
+ bool "Enable additional CIFS debugging routines"
|
|
+ depends on CIFS
|
|
+ help
|
|
+ Enabling this option adds a few more debugging routines
|
|
+ to the cifs code which slightly increases the size of
|
|
+ the cifs module and can cause additional logging of debug
|
|
+ messages in some error paths, slowing performance. This
|
|
+ option can be turned off unless you are debugging
|
|
+ cifs problems. If unsure, say N.
|
|
+
|
|
+config CIFS_EXPERIMENTAL
|
|
+ bool "CIFS Experimental Features (EXPERIMENTAL)"
|
|
+ depends on CIFS && EXPERIMENTAL
|
|
+ help
|
|
+ Enables cifs features under testing. These features are
|
|
+ experimental and currently include DFS support and directory
|
|
+ change notification ie fcntl(F_DNOTIFY), as well as the upcall
|
|
+ mechanism which will be used for Kerberos session negotiation
|
|
+ and uid remapping. Some of these features also may depend on
|
|
+ setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental
|
|
+ (which is disabled by default). See the file fs/cifs/README
|
|
+ for more details. If unsure, say N.
|
|
+
|
|
+config CIFS_UPCALL
|
|
+ bool "Kerberos/SPNEGO advanced session setup (EXPERIMENTAL)"
|
|
+ depends on CIFS_EXPERIMENTAL
|
|
+ depends on KEYS
|
|
+ help
|
|
+ Enables an upcall mechanism for CIFS which accesses
|
|
+ userspace helper utilities to provide SPNEGO packaged (RFC 4178)
|
|
+ Kerberos tickets which are needed to mount to certain secure servers
|
|
+ (for which more secure Kerberos authentication is required). If
|
|
+ unsure, say N.
|
|
+
|
|
+config CIFS_DFS_UPCALL
|
|
+ bool "DFS feature support (EXPERIMENTAL)"
|
|
+ depends on CIFS_EXPERIMENTAL
|
|
+ depends on KEYS
|
|
+ help
|
|
+ Enables an upcall mechanism for CIFS which contacts userspace
|
|
+ helper utilities to provide server name resolution (host names to
|
|
+ IP addresses) which is needed for implicit mounts of DFS junction
|
|
+ points. If unsure, say N.
|
|
+
|
|
+config NCP_FS
|
|
+ tristate "NCP file system support (to mount NetWare volumes)"
|
|
+ depends on IPX!=n || INET
|
|
+ help
|
|
+ NCP (NetWare Core Protocol) is a protocol that runs over IPX and is
|
|
+ used by Novell NetWare clients to talk to file servers. It is to
|
|
+ IPX what NFS is to TCP/IP, if that helps. Saying Y here allows you
|
|
+ to mount NetWare file server volumes and to access them just like
|
|
+ any other Unix directory. For details, please read the file
|
|
+ <file:Documentation/filesystems/ncpfs.txt> in the kernel source and
|
|
+ the IPX-HOWTO from <http://www.tldp.org/docs.html#howto>.
|
|
+
|
|
+ You do not have to say Y here if you want your Linux box to act as a
|
|
+ file *server* for Novell NetWare clients.
|
|
+
|
|
+ General information about how to connect Linux, Windows machines and
|
|
+ Macs is on the WWW at <http://www.eats.com/linux_mac_win.html>.
|
|
+
|
|
+ To compile this as a module, choose M here: the module will be called
|
|
+ ncpfs. Say N unless you are connected to a Novell network.
|
|
+
|
|
+source "fs/ncpfs/Kconfig"
|
|
+
|
|
+config CODA_FS
|
|
+ tristate "Coda file system support (advanced network fs)"
|
|
+ depends on INET
|
|
+ help
|
|
+ Coda is an advanced network file system, similar to NFS in that it
|
|
+ enables you to mount file systems of a remote server and access them
|
|
+ with regular Unix commands as if they were sitting on your hard
|
|
+ disk. Coda has several advantages over NFS: support for
|
|
+ disconnected operation (e.g. for laptops), read/write server
|
|
+ replication, security model for authentication and encryption,
|
|
+ persistent client caches and write back caching.
|
|
+
|
|
+ If you say Y here, your Linux box will be able to act as a Coda
|
|
+ *client*. You will need user level code as well, both for the
|
|
+ client and server. Servers are currently user level, i.e. they need
|
|
+ no kernel support. Please read
|
|
+ <file:Documentation/filesystems/coda.txt> and check out the Coda
|
|
+ home page <http://www.coda.cs.cmu.edu/>.
|
|
+
|
|
+ To compile the coda client support as a module, choose M here: the
|
|
+ module will be called coda.
|
|
+
|
|
+config AFS_FS
|
|
+ tristate "Andrew File System support (AFS) (EXPERIMENTAL)"
|
|
+ depends on INET && EXPERIMENTAL
|
|
+ select AF_RXRPC
|
|
+ help
|
|
+ If you say Y here, you will get an experimental Andrew File System
|
|
+ driver. It currently only supports unsecured read-only AFS access.
|
|
+
|
|
+ See <file:Documentation/filesystems/afs.txt> for more information.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config AFS_DEBUG
|
|
+ bool "AFS dynamic debugging"
|
|
+ depends on AFS_FS
|
|
+ help
|
|
+ Say Y here to make runtime controllable debugging messages appear.
|
|
+
|
|
+ See <file:Documentation/filesystems/afs.txt> for more information.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+config 9P_FS
|
|
+ tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
|
|
+ depends on INET && NET_9P && EXPERIMENTAL
|
|
+ help
|
|
+ If you say Y here, you will get experimental support for
|
|
+ Plan 9 resource sharing via the 9P2000 protocol.
|
|
+
|
|
+ See <http://v9fs.sf.net> for more information.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
+endif # NETWORK_FILESYSTEMS
|
|
+
|
|
+if BLOCK
|
|
+menu "Partition Types"
|
|
+
|
|
+source "fs/partitions/Kconfig"
|
|
+
|
|
+endmenu
|
|
+endif
|
|
+
|
|
+source "fs/nls/Kconfig"
|
|
+source "fs/dlm/Kconfig"
|
|
+
|
|
+endmenu
|
|
diff -uNr a/fs/Makefile b/fs/Makefile
|
|
--- a/fs/Makefile 2008-07-28 19:40:31.000000000 -0700
|
|
+++ b/fs/Makefile 2008-08-13 16:18:09.000000000 -0700
|
|
@@ -74,6 +74,7 @@
|
|
obj-$(CONFIG_JBD2) += jbd2/
|
|
obj-$(CONFIG_EXT2_FS) += ext2/
|
|
obj-$(CONFIG_CRAMFS) += cramfs/
|
|
+obj-$(CONFIG_SQUASHFS) += squashfs/
|
|
obj-y += ramfs/
|
|
obj-$(CONFIG_HUGETLBFS) += hugetlbfs/
|
|
obj-$(CONFIG_CODA_FS) += coda/
|
|
diff -uNr a/fs/squashfs/block.c b/fs/squashfs/block.c
|
|
--- a/fs/squashfs/block.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/block.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,314 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * block.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+static struct buffer_head *get_block_length(struct super_block *s,
|
|
+ int *cur_index, int *offset, int *c_byte)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ unsigned short temp;
|
|
+ struct buffer_head *bh;
|
|
+
|
|
+ if (!(bh = sb_bread(s, *cur_index)))
|
|
+ goto out;
|
|
+
|
|
+ if (msblk->devblksize - *offset == 1) {
|
|
+ if (msblk->swap)
|
|
+ ((unsigned char *) &temp)[1] = *((unsigned char *)
|
|
+ (bh->b_data + *offset));
|
|
+ else
|
|
+ ((unsigned char *) &temp)[0] = *((unsigned char *)
|
|
+ (bh->b_data + *offset));
|
|
+ brelse(bh);
|
|
+ if (!(bh = sb_bread(s, ++(*cur_index))))
|
|
+ goto out;
|
|
+ if (msblk->swap)
|
|
+ ((unsigned char *) &temp)[0] = *((unsigned char *)
|
|
+ bh->b_data);
|
|
+ else
|
|
+ ((unsigned char *) &temp)[1] = *((unsigned char *)
|
|
+ bh->b_data);
|
|
+ *c_byte = temp;
|
|
+ *offset = 1;
|
|
+ } else {
|
|
+ if (msblk->swap) {
|
|
+ ((unsigned char *) &temp)[1] = *((unsigned char *)
|
|
+ (bh->b_data + *offset));
|
|
+ ((unsigned char *) &temp)[0] = *((unsigned char *)
|
|
+ (bh->b_data + *offset + 1));
|
|
+ } else {
|
|
+ ((unsigned char *) &temp)[0] = *((unsigned char *)
|
|
+ (bh->b_data + *offset));
|
|
+ ((unsigned char *) &temp)[1] = *((unsigned char *)
|
|
+ (bh->b_data + *offset + 1));
|
|
+ }
|
|
+ *c_byte = temp;
|
|
+ *offset += 2;
|
|
+ }
|
|
+
|
|
+ if (SQUASHFS_CHECK_DATA(msblk->sblk.flags)) {
|
|
+ if (*offset == msblk->devblksize) {
|
|
+ brelse(bh);
|
|
+ if (!(bh = sb_bread(s, ++(*cur_index))))
|
|
+ goto out;
|
|
+ *offset = 0;
|
|
+ }
|
|
+ if (*((unsigned char *) (bh->b_data + *offset)) !=
|
|
+ SQUASHFS_MARKER_BYTE) {
|
|
+ ERROR("Metadata block marker corrupt @ %x\n",
|
|
+ *cur_index);
|
|
+ brelse(bh);
|
|
+ goto out;
|
|
+ }
|
|
+ (*offset)++;
|
|
+ }
|
|
+ return bh;
|
|
+
|
|
+out:
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+
|
|
+unsigned int squashfs_read_data(struct super_block *s, char *buffer,
|
|
+ long long index, unsigned int length,
|
|
+ long long *next_index, int srclength)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ struct buffer_head **bh;
|
|
+ unsigned int offset = index & ((1 << msblk->devblksize_log2) - 1);
|
|
+ unsigned int cur_index = index >> msblk->devblksize_log2;
|
|
+ int bytes, avail_bytes, b = 0, k = 0;
|
|
+ unsigned int compressed;
|
|
+ unsigned int c_byte = length;
|
|
+
|
|
+ bh = kmalloc(((sblk->block_size >> msblk->devblksize_log2) + 1) *
|
|
+ sizeof(struct buffer_head *), GFP_KERNEL);
|
|
+ if (bh == NULL)
|
|
+ goto read_failure;
|
|
+
|
|
+ if (c_byte) {
|
|
+ bytes = -offset;
|
|
+ compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte);
|
|
+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
|
|
+
|
|
+ TRACE("Block @ 0x%llx, %scompressed size %d, src size %d\n", index,
|
|
+ compressed ? "" : "un", (unsigned int) c_byte, srclength);
|
|
+
|
|
+ if (c_byte > srclength || index < 0 || (index + c_byte) > sblk->bytes_used)
|
|
+ goto read_failure;
|
|
+
|
|
+ for (b = 0; bytes < (int) c_byte; b++, cur_index++) {
|
|
+ bh[b] = sb_getblk(s, cur_index);
|
|
+ if (bh[b] == NULL)
|
|
+ goto block_release;
|
|
+ bytes += msblk->devblksize;
|
|
+ }
|
|
+ ll_rw_block(READ, b, bh);
|
|
+ } else {
|
|
+ if (index < 0 || (index + 2) > sblk->bytes_used)
|
|
+ goto read_failure;
|
|
+
|
|
+ bh[0] = get_block_length(s, &cur_index, &offset, &c_byte);
|
|
+ if (bh[0] == NULL)
|
|
+ goto read_failure;
|
|
+ b = 1;
|
|
+
|
|
+ bytes = msblk->devblksize - offset;
|
|
+ compressed = SQUASHFS_COMPRESSED(c_byte);
|
|
+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
|
|
+
|
|
+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed
|
|
+ ? "" : "un", (unsigned int) c_byte);
|
|
+
|
|
+ if (c_byte > srclength || (index + c_byte) > sblk->bytes_used)
|
|
+ goto block_release;
|
|
+
|
|
+ for (; bytes < c_byte; b++) {
|
|
+ bh[b] = sb_getblk(s, ++cur_index);
|
|
+ if (bh[b] == NULL)
|
|
+ goto block_release;
|
|
+ bytes += msblk->devblksize;
|
|
+ }
|
|
+ ll_rw_block(READ, b - 1, bh + 1);
|
|
+ }
|
|
+
|
|
+ if (compressed) {
|
|
+ int zlib_err = 0;
|
|
+
|
|
+ /*
|
|
+ * uncompress block
|
|
+ */
|
|
+
|
|
+ mutex_lock(&msblk->read_data_mutex);
|
|
+
|
|
+ msblk->stream.next_out = buffer;
|
|
+ msblk->stream.avail_out = srclength;
|
|
+
|
|
+ for (bytes = 0; k < b; k++) {
|
|
+ avail_bytes = min(c_byte - bytes, msblk->devblksize - offset);
|
|
+
|
|
+ wait_on_buffer(bh[k]);
|
|
+ if (!buffer_uptodate(bh[k]))
|
|
+ goto release_mutex;
|
|
+
|
|
+ msblk->stream.next_in = bh[k]->b_data + offset;
|
|
+ msblk->stream.avail_in = avail_bytes;
|
|
+
|
|
+ if (k == 0) {
|
|
+ zlib_err = zlib_inflateInit(&msblk->stream);
|
|
+ if (zlib_err != Z_OK) {
|
|
+ ERROR("zlib_inflateInit returned unexpected result 0x%x,"
|
|
+ " srclength %d\n", zlib_err, srclength);
|
|
+ goto release_mutex;
|
|
+ }
|
|
+
|
|
+ if (avail_bytes == 0) {
|
|
+ offset = 0;
|
|
+ brelse(bh[k]);
|
|
+ continue;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ zlib_err = zlib_inflate(&msblk->stream, Z_NO_FLUSH);
|
|
+ if (zlib_err != Z_OK && zlib_err != Z_STREAM_END) {
|
|
+ ERROR("zlib_inflate returned unexpected result 0x%x,"
|
|
+ " srclength %d, avail_in %d, avail_out %d\n", zlib_err,
|
|
+ srclength, msblk->stream.avail_in, msblk->stream.avail_out);
|
|
+ goto release_mutex;
|
|
+ }
|
|
+
|
|
+ bytes += avail_bytes;
|
|
+ offset = 0;
|
|
+ brelse(bh[k]);
|
|
+ }
|
|
+
|
|
+ if (zlib_err != Z_STREAM_END)
|
|
+ goto release_mutex;
|
|
+
|
|
+ zlib_err = zlib_inflateEnd(&msblk->stream);
|
|
+ if (zlib_err != Z_OK) {
|
|
+ ERROR("zlib_inflateEnd returned unexpected result 0x%x,"
|
|
+ " srclength %d\n", zlib_err, srclength);
|
|
+ goto release_mutex;
|
|
+ }
|
|
+ bytes = msblk->stream.total_out;
|
|
+ mutex_unlock(&msblk->read_data_mutex);
|
|
+ } else {
|
|
+ int i;
|
|
+
|
|
+ for(i = 0; i < b; i++) {
|
|
+ wait_on_buffer(bh[i]);
|
|
+ if (!buffer_uptodate(bh[i]))
|
|
+ goto block_release;
|
|
+ }
|
|
+
|
|
+ for (bytes = 0; k < b; k++) {
|
|
+ avail_bytes = min(c_byte - bytes, msblk->devblksize - offset);
|
|
+
|
|
+ memcpy(buffer + bytes, bh[k]->b_data + offset, avail_bytes);
|
|
+ bytes += avail_bytes;
|
|
+ offset = 0;
|
|
+ brelse(bh[k]);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (next_index)
|
|
+ *next_index = index + c_byte + (length ? 0 :
|
|
+ (SQUASHFS_CHECK_DATA(msblk->sblk.flags) ? 3 : 2));
|
|
+
|
|
+ kfree(bh);
|
|
+ return bytes;
|
|
+
|
|
+release_mutex:
|
|
+ mutex_unlock(&msblk->read_data_mutex);
|
|
+
|
|
+block_release:
|
|
+ for (; k < b; k++)
|
|
+ brelse(bh[k]);
|
|
+
|
|
+read_failure:
|
|
+ ERROR("sb_bread failed reading block 0x%x\n", cur_index);
|
|
+ kfree(bh);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+int squashfs_get_cached_block(struct super_block *s, void *buffer,
|
|
+ long long block, unsigned int offset,
|
|
+ int length, long long *next_block,
|
|
+ unsigned int *next_offset)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ int bytes, return_length = length;
|
|
+ struct squashfs_cache_entry *entry;
|
|
+
|
|
+ TRACE("Entered squashfs_get_cached_block [%llx:%x]\n", block, offset);
|
|
+
|
|
+ while (1) {
|
|
+ entry = squashfs_cache_get(s, msblk->block_cache, block, 0);
|
|
+ bytes = entry->length - offset;
|
|
+
|
|
+ if (entry->error || bytes < 1) {
|
|
+ return_length = 0;
|
|
+ goto finish;
|
|
+ } else if (bytes >= length) {
|
|
+ if (buffer)
|
|
+ memcpy(buffer, entry->data + offset, length);
|
|
+ if (entry->length - offset == length) {
|
|
+ *next_block = entry->next_index;
|
|
+ *next_offset = 0;
|
|
+ } else {
|
|
+ *next_block = block;
|
|
+ *next_offset = offset + length;
|
|
+ }
|
|
+ goto finish;
|
|
+ } else {
|
|
+ if (buffer) {
|
|
+ memcpy(buffer, entry->data + offset, bytes);
|
|
+ buffer = (char *) buffer + bytes;
|
|
+ }
|
|
+ block = entry->next_index;
|
|
+ squashfs_cache_put(msblk->block_cache, entry);
|
|
+ length -= bytes;
|
|
+ offset = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+finish:
|
|
+ squashfs_cache_put(msblk->block_cache, entry);
|
|
+ return return_length;
|
|
+}
|
|
diff -uNr a/fs/squashfs/cache.c b/fs/squashfs/cache.c
|
|
--- a/fs/squashfs/cache.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/cache.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,189 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * cache.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+struct squashfs_cache_entry *squashfs_cache_get(struct super_block *s,
|
|
+ struct squashfs_cache *cache, long long block, int length)
|
|
+{
|
|
+ int i, n;
|
|
+ struct squashfs_cache_entry *entry;
|
|
+
|
|
+ spin_lock(&cache->lock);
|
|
+
|
|
+ while (1) {
|
|
+ for (i = 0; i < cache->entries && cache->entry[i].block != block; i++);
|
|
+
|
|
+ if (i == cache->entries) {
|
|
+ if (cache->unused_blks == 0) {
|
|
+ cache->waiting ++;
|
|
+ spin_unlock(&cache->lock);
|
|
+ wait_event(cache->wait_queue, cache->unused_blks);
|
|
+ spin_lock(&cache->lock);
|
|
+ cache->waiting --;
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ i = cache->next_blk;
|
|
+ for (n = 0; n < cache->entries; n++) {
|
|
+ if (cache->entry[i].locked == 0)
|
|
+ break;
|
|
+ i = (i + 1) % cache->entries;
|
|
+ }
|
|
+
|
|
+ cache->next_blk = (i + 1) % cache->entries;
|
|
+ entry = &cache->entry[i];
|
|
+
|
|
+ cache->unused_blks --;
|
|
+ entry->block = block;
|
|
+ entry->locked = 1;
|
|
+ entry->pending = 1;
|
|
+ entry->waiting = 0;
|
|
+ entry->error = 0;
|
|
+ spin_unlock(&cache->lock);
|
|
+
|
|
+ entry->length = squashfs_read_data(s, entry->data,
|
|
+ block, length, &entry->next_index, cache->block_size);
|
|
+
|
|
+ spin_lock(&cache->lock);
|
|
+
|
|
+ if (entry->length == 0)
|
|
+ entry->error = 1;
|
|
+
|
|
+ entry->pending = 0;
|
|
+ spin_unlock(&cache->lock);
|
|
+ if (entry->waiting)
|
|
+ wake_up_all(&entry->wait_queue);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ entry = &cache->entry[i];
|
|
+ if (entry->locked == 0)
|
|
+ cache->unused_blks --;
|
|
+ entry->locked++;
|
|
+
|
|
+ if (entry->pending) {
|
|
+ entry->waiting ++;
|
|
+ spin_unlock(&cache->lock);
|
|
+ wait_event(entry->wait_queue, !entry->pending);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ spin_unlock(&cache->lock);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+out:
|
|
+ TRACE("Got %s %d, start block %lld, locked %d, error %d\n", i,
|
|
+ cache->name, entry->block, entry->locked, entry->error);
|
|
+ if (entry->error)
|
|
+ ERROR("Unable to read %s cache entry [%llx]\n", cache->name, block);
|
|
+ return entry;
|
|
+}
|
|
+
|
|
+
|
|
+void squashfs_cache_put(struct squashfs_cache *cache,
|
|
+ struct squashfs_cache_entry *entry)
|
|
+{
|
|
+ spin_lock(&cache->lock);
|
|
+ entry->locked --;
|
|
+ if (entry->locked == 0) {
|
|
+ cache->unused_blks ++;
|
|
+ spin_unlock(&cache->lock);
|
|
+ if (cache->waiting)
|
|
+ wake_up(&cache->wait_queue);
|
|
+ } else
|
|
+ spin_unlock(&cache->lock);
|
|
+}
|
|
+
|
|
+
|
|
+void squashfs_cache_delete(struct squashfs_cache *cache)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ if (cache == NULL)
|
|
+ return;
|
|
+
|
|
+ for (i = 0; i < cache->entries; i++)
|
|
+ if (cache->entry[i].data) {
|
|
+ if (cache->use_vmalloc)
|
|
+ vfree(cache->entry[i].data);
|
|
+ else
|
|
+ kfree(cache->entry[i].data);
|
|
+ }
|
|
+
|
|
+ kfree(cache);
|
|
+}
|
|
+
|
|
+
|
|
+struct squashfs_cache *squashfs_cache_init(char *name, int entries,
|
|
+ int block_size, int use_vmalloc)
|
|
+{
|
|
+ int i;
|
|
+ struct squashfs_cache *cache = kzalloc(sizeof(struct squashfs_cache) +
|
|
+ entries * sizeof(struct squashfs_cache_entry), GFP_KERNEL);
|
|
+ if (cache == NULL) {
|
|
+ ERROR("Failed to allocate %s cache\n", name);
|
|
+ goto failed;
|
|
+ }
|
|
+
|
|
+ cache->next_blk = 0;
|
|
+ cache->unused_blks = entries;
|
|
+ cache->entries = entries;
|
|
+ cache->block_size = block_size;
|
|
+ cache->use_vmalloc = use_vmalloc;
|
|
+ cache->name = name;
|
|
+ cache->waiting = 0;
|
|
+ spin_lock_init(&cache->lock);
|
|
+ init_waitqueue_head(&cache->wait_queue);
|
|
+
|
|
+ for (i = 0; i < entries; i++) {
|
|
+ init_waitqueue_head(&cache->entry[i].wait_queue);
|
|
+ cache->entry[i].block = SQUASHFS_INVALID_BLK;
|
|
+ cache->entry[i].data = use_vmalloc ? vmalloc(block_size) :
|
|
+ kmalloc(block_size, GFP_KERNEL);
|
|
+ if (cache->entry[i].data == NULL) {
|
|
+ ERROR("Failed to allocate %s cache entry\n", name);
|
|
+ goto cleanup;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return cache;
|
|
+
|
|
+cleanup:
|
|
+ squashfs_cache_delete(cache);
|
|
+failed:
|
|
+ return NULL;
|
|
+}
|
|
diff -uNr a/fs/squashfs/dir.c b/fs/squashfs/dir.c
|
|
--- a/fs/squashfs/dir.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/dir.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,216 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * dir.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+static const unsigned char squashfs_filetype_table[] = {
|
|
+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
|
|
+};
|
|
+
|
|
+static int get_dir_index_using_offset(struct super_block *s,
|
|
+ long long *next_block, unsigned int *next_offset,
|
|
+ long long index_start, unsigned int index_offset, int i_count,
|
|
+ long long f_pos)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ int i, length = 0;
|
|
+ struct squashfs_dir_index index;
|
|
+
|
|
+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
|
|
+ i_count, (unsigned int) f_pos);
|
|
+
|
|
+ f_pos -= 3;
|
|
+ if (f_pos == 0)
|
|
+ goto finish;
|
|
+
|
|
+ for (i = 0; i < i_count; i++) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_index sindex;
|
|
+ squashfs_get_cached_block(s, &sindex, index_start, index_offset,
|
|
+ sizeof(sindex), &index_start, &index_offset);
|
|
+ SQUASHFS_SWAP_DIR_INDEX(&index, &sindex);
|
|
+ } else
|
|
+ squashfs_get_cached_block(s, &index, index_start, index_offset,
|
|
+ sizeof(index), &index_start, &index_offset);
|
|
+
|
|
+ if (index.index > f_pos)
|
|
+ break;
|
|
+
|
|
+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
|
|
+ index.size + 1, &index_start, &index_offset);
|
|
+
|
|
+ length = index.index;
|
|
+ *next_block = index.start_block + sblk->directory_table_start;
|
|
+ }
|
|
+
|
|
+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
|
|
+
|
|
+finish:
|
|
+ return length + 3;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
|
|
+{
|
|
+ struct inode *i = file->f_dentry->d_inode;
|
|
+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ long long next_block = SQUASHFS_I(i)->start_block +
|
|
+ sblk->directory_table_start;
|
|
+ int next_offset = SQUASHFS_I(i)->offset, length = 0, dir_count;
|
|
+ struct squashfs_dir_header dirh;
|
|
+ struct squashfs_dir_entry *dire;
|
|
+
|
|
+ TRACE("Entered squashfs_readdir [%llx:%x]\n", next_block, next_offset);
|
|
+
|
|
+ dire = kmalloc(sizeof(struct squashfs_dir_entry) +
|
|
+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL);
|
|
+ if (dire == NULL) {
|
|
+ ERROR("Failed to allocate squashfs_dir_entry\n");
|
|
+ goto finish;
|
|
+ }
|
|
+
|
|
+ while(file->f_pos < 3) {
|
|
+ char *name;
|
|
+ int size, i_ino;
|
|
+
|
|
+ if(file->f_pos == 0) {
|
|
+ name = ".";
|
|
+ size = 1;
|
|
+ i_ino = i->i_ino;
|
|
+ } else {
|
|
+ name = "..";
|
|
+ size = 2;
|
|
+ i_ino = SQUASHFS_I(i)->u.s2.parent_inode;
|
|
+ }
|
|
+ TRACE("Calling filldir(%x, %s, %d, %d, %d, %d)\n",
|
|
+ (unsigned int) dirent, name, size, (int)
|
|
+ file->f_pos, i_ino, squashfs_filetype_table[1]);
|
|
+
|
|
+ if (filldir(dirent, name, size, file->f_pos, i_ino,
|
|
+ squashfs_filetype_table[1]) < 0) {
|
|
+ TRACE("Filldir returned less than 0\n");
|
|
+ goto finish;
|
|
+ }
|
|
+ file->f_pos += size;
|
|
+ }
|
|
+
|
|
+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_start,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count, file->f_pos);
|
|
+
|
|
+ while (length < i_size_read(i)) {
|
|
+ /* read directory header */
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_header sdirh;
|
|
+
|
|
+ if (!squashfs_get_cached_block(i->i_sb, &sdirh, next_block,
|
|
+ next_offset, sizeof(sdirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdirh);
|
|
+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, &dirh, next_block,
|
|
+ next_offset, sizeof(dirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(dirh);
|
|
+ }
|
|
+
|
|
+ dir_count = dirh.count + 1;
|
|
+ while (dir_count--) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_entry sdire;
|
|
+ if (!squashfs_get_cached_block(i->i_sb, &sdire, next_block,
|
|
+ next_offset, sizeof(sdire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdire);
|
|
+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, dire, next_block,
|
|
+ next_offset, sizeof(*dire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(*dire);
|
|
+ }
|
|
+
|
|
+ if (!squashfs_get_cached_block(i->i_sb, dire->name, next_block,
|
|
+ next_offset, dire->size + 1, &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += dire->size + 1;
|
|
+
|
|
+ if (file->f_pos >= length)
|
|
+ continue;
|
|
+
|
|
+ dire->name[dire->size + 1] = '\0';
|
|
+
|
|
+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d, %d)\n",
|
|
+ (unsigned int) dirent, dire->name, dire->size + 1,
|
|
+ (int) file->f_pos, dirh.start_block, dire->offset,
|
|
+ dirh.inode_number + dire->inode_number,
|
|
+ squashfs_filetype_table[dire->type]);
|
|
+
|
|
+ if (filldir(dirent, dire->name, dire->size + 1, file->f_pos,
|
|
+ dirh.inode_number + dire->inode_number,
|
|
+ squashfs_filetype_table[dire->type]) < 0) {
|
|
+ TRACE("Filldir returned less than 0\n");
|
|
+ goto finish;
|
|
+ }
|
|
+ file->f_pos = length;
|
|
+ }
|
|
+ }
|
|
+
|
|
+finish:
|
|
+ kfree(dire);
|
|
+ return 0;
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
|
|
+ next_offset);
|
|
+ kfree(dire);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+const struct file_operations squashfs_dir_ops = {
|
|
+ .read = generic_read_dir,
|
|
+ .readdir = squashfs_readdir
|
|
+};
|
|
diff -uNr a/fs/squashfs/export.c b/fs/squashfs/export.c
|
|
--- a/fs/squashfs/export.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/export.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,171 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * export.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+static squashfs_inode_t squashfs_inode_lookup(struct super_block *s, int ino)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ long long start = msblk->inode_lookup_table[SQUASHFS_LOOKUP_BLOCK(ino - 1)];
|
|
+ int offset = SQUASHFS_LOOKUP_BLOCK_OFFSET(ino - 1);
|
|
+ squashfs_inode_t inode;
|
|
+
|
|
+ TRACE("Entered squashfs_inode_lookup, inode_number = %d\n", ino);
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ squashfs_inode_t sinode;
|
|
+
|
|
+ if (!squashfs_get_cached_block(s, &sinode, start, offset,
|
|
+ sizeof(sinode), &start, &offset))
|
|
+ goto out;
|
|
+ SQUASHFS_SWAP_INODE_T((&inode), &sinode);
|
|
+ } else if (!squashfs_get_cached_block(s, &inode, start, offset,
|
|
+ sizeof(inode), &start, &offset))
|
|
+ goto out;
|
|
+
|
|
+ TRACE("squashfs_inode_lookup, inode = 0x%llx\n", inode);
|
|
+
|
|
+ return inode;
|
|
+
|
|
+out:
|
|
+ return SQUASHFS_INVALID_BLK;
|
|
+}
|
|
+
|
|
+
|
|
+static struct dentry *squashfs_export_iget(struct super_block *s,
|
|
+ unsigned int inode_number)
|
|
+{
|
|
+ squashfs_inode_t inode;
|
|
+ struct inode *i;
|
|
+ struct dentry *dentry;
|
|
+
|
|
+ TRACE("Entered squashfs_export_iget\n");
|
|
+
|
|
+ inode = squashfs_inode_lookup(s, inode_number);
|
|
+ if(inode == SQUASHFS_INVALID_BLK) {
|
|
+ dentry = ERR_PTR(-ENOENT);
|
|
+ goto failure;
|
|
+ }
|
|
+
|
|
+ i = squashfs_iget(s, inode, inode_number);
|
|
+ if(i == NULL) {
|
|
+ dentry = ERR_PTR(-EACCES);
|
|
+ goto failure;
|
|
+ }
|
|
+
|
|
+ dentry = d_alloc_anon(i);
|
|
+ if (dentry == NULL) {
|
|
+ iput(i);
|
|
+ dentry = ERR_PTR(-ENOMEM);
|
|
+ }
|
|
+
|
|
+failure:
|
|
+ return dentry;
|
|
+}
|
|
+
|
|
+
|
|
+static struct dentry *squashfs_fh_to_dentry(struct super_block *s,
|
|
+ struct fid *fid, int fh_len, int fh_type)
|
|
+{
|
|
+ if((fh_type != FILEID_INO32_GEN && fh_type != FILEID_INO32_GEN_PARENT) ||
|
|
+ fh_len < 2)
|
|
+ return NULL;
|
|
+
|
|
+ return squashfs_export_iget(s, fid->i32.ino);
|
|
+}
|
|
+
|
|
+
|
|
+static struct dentry *squashfs_fh_to_parent(struct super_block *s,
|
|
+ struct fid *fid, int fh_len, int fh_type)
|
|
+{
|
|
+ if(fh_type != FILEID_INO32_GEN_PARENT || fh_len < 4)
|
|
+ return NULL;
|
|
+
|
|
+ return squashfs_export_iget(s, fid->i32.parent_ino);
|
|
+}
|
|
+
|
|
+
|
|
+static struct dentry *squashfs_get_parent(struct dentry *child)
|
|
+{
|
|
+ struct inode *i = child->d_inode;
|
|
+
|
|
+ TRACE("Entered squashfs_get_parent\n");
|
|
+
|
|
+ return squashfs_export_iget(i->i_sb, SQUASHFS_I(i)->u.s2.parent_inode);
|
|
+}
|
|
+
|
|
+
|
|
+int read_inode_lookup_table(struct super_block *s)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ unsigned int length = SQUASHFS_LOOKUP_BLOCK_BYTES(sblk->inodes);
|
|
+
|
|
+ TRACE("In read_inode_lookup_table, length %d\n", length);
|
|
+
|
|
+ /* Allocate inode lookup table */
|
|
+ msblk->inode_lookup_table = kmalloc(length, GFP_KERNEL);
|
|
+ if (msblk->inode_lookup_table == NULL) {
|
|
+ ERROR("Failed to allocate inode lookup table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (!squashfs_read_data(s, (char *) msblk->inode_lookup_table,
|
|
+ sblk->lookup_table_start, length |
|
|
+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
|
|
+ ERROR("unable to read inode lookup table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ int i;
|
|
+ long long block;
|
|
+
|
|
+ for (i = 0; i < SQUASHFS_LOOKUP_BLOCKS(sblk->inodes); i++) {
|
|
+ SQUASHFS_SWAP_LOOKUP_BLOCKS((&block),
|
|
+ &msblk->inode_lookup_table[i], 1);
|
|
+ msblk->inode_lookup_table[i] = block;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+
|
|
+const struct export_operations squashfs_export_ops = {
|
|
+ .fh_to_dentry = squashfs_fh_to_dentry,
|
|
+ .fh_to_parent = squashfs_fh_to_parent,
|
|
+ .get_parent = squashfs_get_parent
|
|
+};
|
|
diff -uNr a/fs/squashfs/file.c b/fs/squashfs/file.c
|
|
--- a/fs/squashfs/file.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/file.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,430 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * file.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+static struct meta_index *locate_meta_index(struct inode *inode, int index, int offset)
|
|
+{
|
|
+ struct meta_index *meta = NULL;
|
|
+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
|
|
+ int i;
|
|
+
|
|
+ mutex_lock(&msblk->meta_index_mutex);
|
|
+
|
|
+ TRACE("locate_meta_index: index %d, offset %d\n", index, offset);
|
|
+
|
|
+ if (msblk->meta_index == NULL)
|
|
+ goto not_allocated;
|
|
+
|
|
+ for (i = 0; i < SQUASHFS_META_NUMBER; i ++) {
|
|
+ if (msblk->meta_index[i].inode_number == inode->i_ino &&
|
|
+ msblk->meta_index[i].offset >= offset &&
|
|
+ msblk->meta_index[i].offset <= index &&
|
|
+ msblk->meta_index[i].locked == 0) {
|
|
+ TRACE("locate_meta_index: entry %d, offset %d\n", i,
|
|
+ msblk->meta_index[i].offset);
|
|
+ meta = &msblk->meta_index[i];
|
|
+ offset = meta->offset;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (meta)
|
|
+ meta->locked = 1;
|
|
+
|
|
+not_allocated:
|
|
+ mutex_unlock(&msblk->meta_index_mutex);
|
|
+
|
|
+ return meta;
|
|
+}
|
|
+
|
|
+
|
|
+static struct meta_index *empty_meta_index(struct inode *inode, int offset, int skip)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
|
|
+ struct meta_index *meta = NULL;
|
|
+ int i;
|
|
+
|
|
+ mutex_lock(&msblk->meta_index_mutex);
|
|
+
|
|
+ TRACE("empty_meta_index: offset %d, skip %d\n", offset, skip);
|
|
+
|
|
+ if (msblk->meta_index == NULL) {
|
|
+ msblk->meta_index = kmalloc(sizeof(struct meta_index) *
|
|
+ SQUASHFS_META_NUMBER, GFP_KERNEL);
|
|
+ if (msblk->meta_index == NULL) {
|
|
+ ERROR("Failed to allocate meta_index\n");
|
|
+ goto failed;
|
|
+ }
|
|
+ for (i = 0; i < SQUASHFS_META_NUMBER; i++) {
|
|
+ msblk->meta_index[i].inode_number = 0;
|
|
+ msblk->meta_index[i].locked = 0;
|
|
+ }
|
|
+ msblk->next_meta_index = 0;
|
|
+ }
|
|
+
|
|
+ for (i = SQUASHFS_META_NUMBER; i &&
|
|
+ msblk->meta_index[msblk->next_meta_index].locked; i --)
|
|
+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
|
|
+ SQUASHFS_META_NUMBER;
|
|
+
|
|
+ if (i == 0) {
|
|
+ TRACE("empty_meta_index: failed!\n");
|
|
+ goto failed;
|
|
+ }
|
|
+
|
|
+ TRACE("empty_meta_index: returned meta entry %d, %p\n",
|
|
+ msblk->next_meta_index,
|
|
+ &msblk->meta_index[msblk->next_meta_index]);
|
|
+
|
|
+ meta = &msblk->meta_index[msblk->next_meta_index];
|
|
+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
|
|
+ SQUASHFS_META_NUMBER;
|
|
+
|
|
+ meta->inode_number = inode->i_ino;
|
|
+ meta->offset = offset;
|
|
+ meta->skip = skip;
|
|
+ meta->entries = 0;
|
|
+ meta->locked = 1;
|
|
+
|
|
+failed:
|
|
+ mutex_unlock(&msblk->meta_index_mutex);
|
|
+ return meta;
|
|
+}
|
|
+
|
|
+
|
|
+static void release_meta_index(struct inode *inode, struct meta_index *meta)
|
|
+{
|
|
+ meta->locked = 0;
|
|
+ smp_mb();
|
|
+}
|
|
+
|
|
+
|
|
+static int read_block_index(struct super_block *s, int blocks, char *block_list,
|
|
+ long long *start_block, int *offset)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ unsigned int *block_listp;
|
|
+ int block = 0;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ char sblock_list[blocks << 2];
|
|
+
|
|
+ if (!squashfs_get_cached_block(s, sblock_list, *start_block,
|
|
+ *offset, blocks << 2, start_block, offset)) {
|
|
+ ERROR("Fail reading block list [%llx:%x]\n", *start_block, *offset);
|
|
+ goto failure;
|
|
+ }
|
|
+ SQUASHFS_SWAP_INTS(((unsigned int *)block_list),
|
|
+ ((unsigned int *)sblock_list), blocks);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(s, block_list, *start_block,
|
|
+ *offset, blocks << 2, start_block, offset)) {
|
|
+ ERROR("Fail reading block list [%llx:%x]\n", *start_block, *offset);
|
|
+ goto failure;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ for (block_listp = (unsigned int *) block_list; blocks;
|
|
+ block_listp++, blocks --)
|
|
+ block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp);
|
|
+
|
|
+ return block;
|
|
+
|
|
+failure:
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+
|
|
+#define SIZE 256
|
|
+
|
|
+static inline int calculate_skip(int blocks) {
|
|
+ int skip = (blocks - 1) / ((SQUASHFS_SLOTS * SQUASHFS_META_ENTRIES + 1) * SQUASHFS_META_INDEXES);
|
|
+ return skip >= 7 ? 7 : skip + 1;
|
|
+}
|
|
+
|
|
+
|
|
+static int get_meta_index(struct inode *inode, int index,
|
|
+ long long *index_block, int *index_offset,
|
|
+ long long *data_block, char *block_list)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ int skip = calculate_skip(i_size_read(inode) >> sblk->block_log);
|
|
+ int offset = 0;
|
|
+ struct meta_index *meta;
|
|
+ struct meta_entry *meta_entry;
|
|
+ long long cur_index_block = SQUASHFS_I(inode)->u.s1.block_list_start;
|
|
+ int cur_offset = SQUASHFS_I(inode)->offset;
|
|
+ long long cur_data_block = SQUASHFS_I(inode)->start_block;
|
|
+ int i;
|
|
+
|
|
+ index /= SQUASHFS_META_INDEXES * skip;
|
|
+
|
|
+ while (offset < index) {
|
|
+ meta = locate_meta_index(inode, index, offset + 1);
|
|
+
|
|
+ if (meta == NULL) {
|
|
+ meta = empty_meta_index(inode, offset + 1, skip);
|
|
+ if (meta == NULL)
|
|
+ goto all_done;
|
|
+ } else {
|
|
+ if(meta->entries == 0)
|
|
+ goto failed;
|
|
+ /* XXX */
|
|
+ offset = index < meta->offset + meta->entries ? index :
|
|
+ meta->offset + meta->entries - 1;
|
|
+ /* XXX */
|
|
+ meta_entry = &meta->meta_entry[offset - meta->offset];
|
|
+ cur_index_block = meta_entry->index_block + sblk->inode_table_start;
|
|
+ cur_offset = meta_entry->offset;
|
|
+ cur_data_block = meta_entry->data_block;
|
|
+ TRACE("get_meta_index: offset %d, meta->offset %d, "
|
|
+ "meta->entries %d\n", offset, meta->offset, meta->entries);
|
|
+ TRACE("get_meta_index: index_block 0x%llx, offset 0x%x"
|
|
+ " data_block 0x%llx\n", cur_index_block,
|
|
+ cur_offset, cur_data_block);
|
|
+ }
|
|
+
|
|
+ for (i = meta->offset + meta->entries; i <= index &&
|
|
+ i < meta->offset + SQUASHFS_META_ENTRIES; i++) {
|
|
+ int blocks = skip * SQUASHFS_META_INDEXES;
|
|
+
|
|
+ while (blocks) {
|
|
+ int block = blocks > (SIZE >> 2) ? (SIZE >> 2) : blocks;
|
|
+ int res = read_block_index(inode->i_sb, block, block_list,
|
|
+ &cur_index_block, &cur_offset);
|
|
+
|
|
+ if (res == -1)
|
|
+ goto failed;
|
|
+
|
|
+ cur_data_block += res;
|
|
+ blocks -= block;
|
|
+ }
|
|
+
|
|
+ meta_entry = &meta->meta_entry[i - meta->offset];
|
|
+ meta_entry->index_block = cur_index_block - sblk->inode_table_start;
|
|
+ meta_entry->offset = cur_offset;
|
|
+ meta_entry->data_block = cur_data_block;
|
|
+ meta->entries ++;
|
|
+ offset ++;
|
|
+ }
|
|
+
|
|
+ TRACE("get_meta_index: meta->offset %d, meta->entries %d\n",
|
|
+ meta->offset, meta->entries);
|
|
+
|
|
+ release_meta_index(inode, meta);
|
|
+ }
|
|
+
|
|
+all_done:
|
|
+ *index_block = cur_index_block;
|
|
+ *index_offset = cur_offset;
|
|
+ *data_block = cur_data_block;
|
|
+
|
|
+ return offset * SQUASHFS_META_INDEXES * skip;
|
|
+
|
|
+failed:
|
|
+ release_meta_index(inode, meta);
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+
|
|
+long long read_blocklist(struct inode *inode, int index,
|
|
+ int readahead_blks, char *block_list,
|
|
+ unsigned short **block_p, unsigned int *bsize)
|
|
+{
|
|
+ long long block_ptr;
|
|
+ int offset;
|
|
+ long long block;
|
|
+ int res = get_meta_index(inode, index, &block_ptr, &offset, &block,
|
|
+ block_list);
|
|
+
|
|
+ TRACE("read_blocklist: res %d, index %d, block_ptr 0x%llx, offset"
|
|
+ " 0x%x, block 0x%llx\n", res, index, block_ptr, offset, block);
|
|
+
|
|
+ if(res == -1)
|
|
+ goto failure;
|
|
+
|
|
+ index -= res;
|
|
+
|
|
+ while (index) {
|
|
+ int blocks = index > (SIZE >> 2) ? (SIZE >> 2) : index;
|
|
+ int res = read_block_index(inode->i_sb, blocks, block_list,
|
|
+ &block_ptr, &offset);
|
|
+ if (res == -1)
|
|
+ goto failure;
|
|
+ block += res;
|
|
+ index -= blocks;
|
|
+ }
|
|
+
|
|
+ if (read_block_index(inode->i_sb, 1, block_list, &block_ptr, &offset) == -1)
|
|
+ goto failure;
|
|
+ *bsize = *((unsigned int *) block_list);
|
|
+
|
|
+ return block;
|
|
+
|
|
+failure:
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_readpage(struct file *file, struct page *page)
|
|
+{
|
|
+ struct inode *inode = page->mapping->host;
|
|
+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ unsigned char *block_list = NULL;
|
|
+ long long block;
|
|
+ unsigned int bsize, i;
|
|
+ int bytes;
|
|
+ int index = page->index >> (sblk->block_log - PAGE_CACHE_SHIFT);
|
|
+ void *pageaddr;
|
|
+ struct squashfs_cache_entry *fragment = NULL;
|
|
+ char *data_ptr = msblk->read_page;
|
|
+
|
|
+ int mask = (1 << (sblk->block_log - PAGE_CACHE_SHIFT)) - 1;
|
|
+ int start_index = page->index & ~mask;
|
|
+ int end_index = start_index | mask;
|
|
+ int file_end = i_size_read(inode) >> sblk->block_log;
|
|
+ int sparse = 0;
|
|
+
|
|
+ TRACE("Entered squashfs_readpage, page index %lx, start block %llx\n",
|
|
+ page->index, SQUASHFS_I(inode)->start_block);
|
|
+
|
|
+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
|
|
+ PAGE_CACHE_SHIFT))
|
|
+ goto out;
|
|
+
|
|
+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
|
|
+ || index < file_end) {
|
|
+ block_list = kmalloc(SIZE, GFP_KERNEL);
|
|
+ if (block_list == NULL) {
|
|
+ ERROR("Failed to allocate block_list\n");
|
|
+ goto error_out;
|
|
+ }
|
|
+
|
|
+ block = (msblk->read_blocklist)(inode, index, 1, block_list, NULL, &bsize);
|
|
+ if (block == 0)
|
|
+ goto error_out;
|
|
+
|
|
+ if (bsize == 0) { /* hole */
|
|
+ bytes = index == file_end ?
|
|
+ (i_size_read(inode) & (sblk->block_size - 1)) : sblk->block_size;
|
|
+ sparse = 1;
|
|
+ } else {
|
|
+ mutex_lock(&msblk->read_page_mutex);
|
|
+
|
|
+ bytes = squashfs_read_data(inode->i_sb, msblk->read_page, block,
|
|
+ bsize, NULL, sblk->block_size);
|
|
+
|
|
+ if (bytes == 0) {
|
|
+ ERROR("Unable to read page, block %llx, size %x\n", block, bsize);
|
|
+ mutex_unlock(&msblk->read_page_mutex);
|
|
+ goto error_out;
|
|
+ }
|
|
+ }
|
|
+ } else {
|
|
+ fragment = get_cached_fragment(inode->i_sb,
|
|
+ SQUASHFS_I(inode)-> u.s1.fragment_start_block,
|
|
+ SQUASHFS_I(inode)->u.s1.fragment_size);
|
|
+
|
|
+ if (fragment->error) {
|
|
+ ERROR("Unable to read page, block %llx, size %x\n",
|
|
+ SQUASHFS_I(inode)->u.s1.fragment_start_block,
|
|
+ (int) SQUASHFS_I(inode)->u.s1.fragment_size);
|
|
+ release_cached_fragment(msblk, fragment);
|
|
+ goto error_out;
|
|
+ }
|
|
+ bytes = i_size_read(inode) & (sblk->block_size - 1);
|
|
+ data_ptr = fragment->data + SQUASHFS_I(inode)->u.s1.fragment_offset;
|
|
+ }
|
|
+
|
|
+ for (i = start_index; i <= end_index && bytes > 0; i++,
|
|
+ bytes -= PAGE_CACHE_SIZE, data_ptr += PAGE_CACHE_SIZE) {
|
|
+ struct page *push_page;
|
|
+ int avail = sparse ? 0 : min_t(unsigned int, bytes, PAGE_CACHE_SIZE);
|
|
+
|
|
+ TRACE("bytes %d, i %d, available_bytes %d\n", bytes, i, avail);
|
|
+
|
|
+ push_page = (i == page->index) ? page :
|
|
+ grab_cache_page_nowait(page->mapping, i);
|
|
+
|
|
+ if (!push_page)
|
|
+ continue;
|
|
+
|
|
+ if (PageUptodate(push_page))
|
|
+ goto skip_page;
|
|
+
|
|
+ pageaddr = kmap_atomic(push_page, KM_USER0);
|
|
+ memcpy(pageaddr, data_ptr, avail);
|
|
+ memset(pageaddr + avail, 0, PAGE_CACHE_SIZE - avail);
|
|
+ kunmap_atomic(pageaddr, KM_USER0);
|
|
+ flush_dcache_page(push_page);
|
|
+ SetPageUptodate(push_page);
|
|
+skip_page:
|
|
+ unlock_page(push_page);
|
|
+ if(i != page->index)
|
|
+ page_cache_release(push_page);
|
|
+ }
|
|
+
|
|
+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
|
|
+ || index < file_end) {
|
|
+ if (!sparse)
|
|
+ mutex_unlock(&msblk->read_page_mutex);
|
|
+ kfree(block_list);
|
|
+ } else
|
|
+ release_cached_fragment(msblk, fragment);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+error_out:
|
|
+ SetPageError(page);
|
|
+out:
|
|
+ pageaddr = kmap_atomic(page, KM_USER0);
|
|
+ memset(pageaddr, 0, PAGE_CACHE_SIZE);
|
|
+ kunmap_atomic(pageaddr, KM_USER0);
|
|
+ flush_dcache_page(page);
|
|
+ if (!PageError(page))
|
|
+ SetPageUptodate(page);
|
|
+ unlock_page(page);
|
|
+
|
|
+ kfree(block_list);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+const struct address_space_operations squashfs_aops = {
|
|
+ .readpage = squashfs_readpage
|
|
+};
|
|
diff -uNr a/fs/squashfs/fragment.c b/fs/squashfs/fragment.c
|
|
--- a/fs/squashfs/fragment.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/fragment.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,122 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * fragment.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+int get_fragment_location(struct super_block *s, unsigned int fragment,
|
|
+ long long *fragment_start_block,
|
|
+ unsigned int *fragment_size)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ long long start_block =
|
|
+ msblk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
|
|
+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
|
|
+ struct squashfs_fragment_entry fragment_entry;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_fragment_entry sfragment_entry;
|
|
+
|
|
+ if (!squashfs_get_cached_block(s, &sfragment_entry, start_block, offset,
|
|
+ sizeof(sfragment_entry), &start_block, &offset))
|
|
+ goto out;
|
|
+ SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, &fragment_entry, start_block, offset,
|
|
+ sizeof(fragment_entry), &start_block, &offset))
|
|
+ goto out;
|
|
+
|
|
+ *fragment_start_block = fragment_entry.start_block;
|
|
+ *fragment_size = fragment_entry.size;
|
|
+
|
|
+ return 1;
|
|
+
|
|
+out:
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+void release_cached_fragment(struct squashfs_sb_info *msblk,
|
|
+ struct squashfs_cache_entry *fragment)
|
|
+{
|
|
+ squashfs_cache_put(msblk->fragment_cache, fragment);
|
|
+}
|
|
+
|
|
+
|
|
+struct squashfs_cache_entry *get_cached_fragment(struct super_block *s,
|
|
+ long long start_block, int length)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+
|
|
+ return squashfs_cache_get(s, msblk->fragment_cache, start_block, length);
|
|
+}
|
|
+
|
|
+
|
|
+int read_fragment_index_table(struct super_block *s)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ unsigned int length = SQUASHFS_FRAGMENT_INDEX_BYTES(sblk->fragments);
|
|
+
|
|
+ if(length == 0)
|
|
+ return 1;
|
|
+
|
|
+ /* Allocate fragment index table */
|
|
+ msblk->fragment_index = kmalloc(length, GFP_KERNEL);
|
|
+ if (msblk->fragment_index == NULL) {
|
|
+ ERROR("Failed to allocate fragment index table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (!squashfs_read_data(s, (char *) msblk->fragment_index,
|
|
+ sblk->fragment_table_start, length |
|
|
+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
|
|
+ ERROR("unable to read fragment index table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ int i;
|
|
+ long long fragment;
|
|
+
|
|
+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sblk->fragments); i++) {
|
|
+ SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment),
|
|
+ &msblk->fragment_index[i], 1);
|
|
+ msblk->fragment_index[i] = fragment;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
diff -uNr a/fs/squashfs/id.c b/fs/squashfs/id.c
|
|
--- a/fs/squashfs/id.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/id.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,97 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * id.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+int get_id(struct super_block *s, unsigned int index, unsigned int *id)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ long long start_block = msblk->id_table[SQUASHFS_ID_BLOCK(index)];
|
|
+ int offset = SQUASHFS_ID_BLOCK_OFFSET(index);
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ unsigned int sid;
|
|
+
|
|
+ if (!squashfs_get_cached_block(s, &sid, start_block, offset,
|
|
+ sizeof(unsigned int), &start_block, &offset))
|
|
+ goto out;
|
|
+ SQUASHFS_SWAP_INTS((&sid), id, 1);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, id, start_block, offset,
|
|
+ sizeof(unsigned int), &start_block, &offset))
|
|
+ goto out;
|
|
+
|
|
+ return 1;
|
|
+
|
|
+out:
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+int read_id_index_table(struct super_block *s)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ unsigned int length = SQUASHFS_ID_BLOCK_BYTES(sblk->no_ids);
|
|
+
|
|
+ TRACE("In read_id_index_table, length %d\n", length);
|
|
+
|
|
+ /* Allocate id index table */
|
|
+ msblk->id_table = kmalloc(length, GFP_KERNEL);
|
|
+ if (msblk->id_table == NULL) {
|
|
+ ERROR("Failed to allocate id index table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (!squashfs_read_data(s, (char *) msblk->id_table,
|
|
+ sblk->id_table_start, length |
|
|
+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
|
|
+ ERROR("unable to read id index table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ int i;
|
|
+ long long block;
|
|
+
|
|
+ for (i = 0; i < SQUASHFS_ID_BLOCKS(sblk->no_ids); i++) {
|
|
+ SQUASHFS_SWAP_ID_BLOCKS((&block), &msblk->id_table[i], 1);
|
|
+ msblk->id_table[i] = block;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
diff -uNr a/fs/squashfs/inode.c b/fs/squashfs/inode.c
|
|
--- a/fs/squashfs/inode.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/inode.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,340 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * inode.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+static int squashfs_new_inode(struct super_block *s, struct inode *i,
|
|
+ struct squashfs_base_inode_header *inodeb)
|
|
+{
|
|
+ if(get_id(s, inodeb->uid, &i->i_uid) == 0)
|
|
+ goto out;
|
|
+ if(get_id(s, inodeb->guid, &i->i_gid) == 0)
|
|
+ goto out;
|
|
+
|
|
+ i->i_ino = inodeb->inode_number;
|
|
+ i->i_mtime.tv_sec = inodeb->mtime;
|
|
+ i->i_atime.tv_sec = inodeb->mtime;
|
|
+ i->i_ctime.tv_sec = inodeb->mtime;
|
|
+ i->i_mode = inodeb->mode;
|
|
+ i->i_size = 0;
|
|
+
|
|
+ return 1;
|
|
+
|
|
+out:
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+struct inode *squashfs_iget(struct super_block *s,
|
|
+ squashfs_inode_t inode, unsigned int inode_number)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct inode *i = iget_locked(s, inode_number);
|
|
+
|
|
+ TRACE("Entered squashfs_iget\n");
|
|
+
|
|
+ if(i && (i->i_state & I_NEW)) {
|
|
+ (msblk->read_inode)(i, inode);
|
|
+ unlock_new_inode(i);
|
|
+ }
|
|
+
|
|
+ return i;
|
|
+}
|
|
+
|
|
+
|
|
+int squashfs_read_inode(struct inode *i, squashfs_inode_t inode)
|
|
+{
|
|
+ struct super_block *s = i->i_sb;
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ long long block = SQUASHFS_INODE_BLK(inode) + sblk->inode_table_start;
|
|
+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
|
|
+ long long next_block;
|
|
+ unsigned int next_offset;
|
|
+ union squashfs_inode_header id, sid;
|
|
+ struct squashfs_base_inode_header *inodeb = &id.base, *sinodeb = &sid.base;
|
|
+
|
|
+ TRACE("Entered squashfs_read_inode\n");
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodeb, block, offset,
|
|
+ sizeof(*sinodeb), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(inodeb, sinodeb, sizeof(*sinodeb));
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodeb, block, offset,
|
|
+ sizeof(*inodeb), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ if(squashfs_new_inode(s, i, inodeb) == 0)
|
|
+ goto failed_read;
|
|
+
|
|
+ switch(inodeb->inode_type) {
|
|
+ case SQUASHFS_FILE_TYPE: {
|
|
+ unsigned int frag_size;
|
|
+ long long frag_blk;
|
|
+ struct squashfs_reg_inode_header *inodep = &id.reg;
|
|
+ struct squashfs_reg_inode_header *sinodep = &sid.reg;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_REG_INODE_HEADER(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ frag_blk = SQUASHFS_INVALID_BLK;
|
|
+
|
|
+ if (inodep->fragment != SQUASHFS_INVALID_FRAG)
|
|
+ if(!get_fragment_location(s, inodep->fragment, &frag_blk,
|
|
+ &frag_size))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = 1;
|
|
+ i->i_size = inodep->file_size;
|
|
+ i->i_fop = &generic_ro_fops;
|
|
+ i->i_mode |= S_IFREG;
|
|
+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
|
|
+ SQUASHFS_I(i)->start_block = inodep->start_block;
|
|
+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
|
|
+ SQUASHFS_I(i)->offset = next_offset;
|
|
+ i->i_data.a_ops = &squashfs_aops;
|
|
+
|
|
+ TRACE("File inode %x:%x, start_block %llx, "
|
|
+ "block_list_start %llx, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep->start_block, next_block,
|
|
+ next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_LREG_TYPE: {
|
|
+ unsigned int frag_size;
|
|
+ long long frag_blk;
|
|
+ struct squashfs_lreg_inode_header *inodep = &id.lreg;
|
|
+ struct squashfs_lreg_inode_header *sinodep = &sid.lreg;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_LREG_INODE_HEADER(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ frag_blk = SQUASHFS_INVALID_BLK;
|
|
+
|
|
+ if (inodep->fragment != SQUASHFS_INVALID_FRAG)
|
|
+ if (!get_fragment_location(s, inodep->fragment, &frag_blk,
|
|
+ &frag_size))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = inodep->nlink;
|
|
+ i->i_size = inodep->file_size;
|
|
+ i->i_fop = &generic_ro_fops;
|
|
+ i->i_mode |= S_IFREG;
|
|
+ i->i_blocks = ((inodep->file_size - inodep->sparse - 1) >> 9) + 1;
|
|
+
|
|
+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
|
|
+ SQUASHFS_I(i)->start_block = inodep->start_block;
|
|
+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
|
|
+ SQUASHFS_I(i)->offset = next_offset;
|
|
+ i->i_data.a_ops = &squashfs_aops;
|
|
+
|
|
+ TRACE("File inode %x:%x, start_block %llx, "
|
|
+ "block_list_start %llx, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep->start_block, next_block,
|
|
+ next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_DIR_TYPE: {
|
|
+ struct squashfs_dir_inode_header *inodep = &id.dir;
|
|
+ struct squashfs_dir_inode_header *sinodep = &sid.dir;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DIR_INODE_HEADER(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = inodep->nlink;
|
|
+ i->i_size = inodep->file_size;
|
|
+ i->i_op = &squashfs_dir_inode_ops;
|
|
+ i->i_fop = &squashfs_dir_ops;
|
|
+ i->i_mode |= S_IFDIR;
|
|
+ SQUASHFS_I(i)->start_block = inodep->start_block;
|
|
+ SQUASHFS_I(i)->offset = inodep->offset;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
|
|
+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
|
|
+
|
|
+ TRACE("Directory inode %x:%x, start_block %x, offset "
|
|
+ "%x\n", SQUASHFS_INODE_BLK(inode),
|
|
+ offset, inodep->start_block,
|
|
+ inodep->offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_LDIR_TYPE: {
|
|
+ struct squashfs_ldir_inode_header *inodep = &id.ldir;
|
|
+ struct squashfs_ldir_inode_header *sinodep = &sid.ldir;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_LDIR_INODE_HEADER(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = inodep->nlink;
|
|
+ i->i_size = inodep->file_size;
|
|
+ i->i_op = &squashfs_dir_inode_ops;
|
|
+ i->i_fop = &squashfs_dir_ops;
|
|
+ i->i_mode |= S_IFDIR;
|
|
+ SQUASHFS_I(i)->start_block = inodep->start_block;
|
|
+ SQUASHFS_I(i)->offset = inodep->offset;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_offset = next_offset;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count = inodep->i_count;
|
|
+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
|
|
+
|
|
+ TRACE("Long directory inode %x:%x, start_block %x, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep->start_block, inodep->offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_SYMLINK_TYPE: {
|
|
+ struct squashfs_symlink_inode_header *inodep = &id.symlink;
|
|
+ struct squashfs_symlink_inode_header *sinodep = &sid.symlink;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = inodep->nlink;
|
|
+ i->i_size = inodep->symlink_size;
|
|
+ i->i_op = &page_symlink_inode_operations;
|
|
+ i->i_data.a_ops = &squashfs_symlink_aops;
|
|
+ i->i_mode |= S_IFLNK;
|
|
+ SQUASHFS_I(i)->start_block = next_block;
|
|
+ SQUASHFS_I(i)->offset = next_offset;
|
|
+
|
|
+ TRACE("Symbolic link inode %x:%x, start_block %llx, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ next_block, next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_BLKDEV_TYPE:
|
|
+ case SQUASHFS_CHRDEV_TYPE: {
|
|
+ struct squashfs_dev_inode_header *inodep = &id.dev;
|
|
+ struct squashfs_dev_inode_header *sinodep = &sid.dev;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DEV_INODE_HEADER(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = inodep->nlink;
|
|
+ i->i_mode |= (inodeb->inode_type == SQUASHFS_CHRDEV_TYPE) ?
|
|
+ S_IFCHR : S_IFBLK;
|
|
+ init_special_inode(i, i->i_mode, old_decode_dev(inodep->rdev));
|
|
+
|
|
+ TRACE("Device inode %x:%x, rdev %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset, inodep->rdev);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_FIFO_TYPE:
|
|
+ case SQUASHFS_SOCKET_TYPE: {
|
|
+ struct squashfs_ipc_inode_header *inodep = &id.ipc;
|
|
+ struct squashfs_ipc_inode_header *sinodep = &sid.ipc;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_IPC_INODE_HEADER(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = inodep->nlink;
|
|
+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
|
|
+ ? S_IFIFO : S_IFSOCK;
|
|
+ init_special_inode(i, i->i_mode, 0);
|
|
+ break;
|
|
+ }
|
|
+ default:
|
|
+ ERROR("Unknown inode type %d in squashfs_iget!\n",
|
|
+ inodeb->inode_type);
|
|
+ goto failed_read1;
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read inode [%llx:%x]\n", block, offset);
|
|
+
|
|
+failed_read1:
|
|
+ make_bad_inode(i);
|
|
+ return 0;
|
|
+}
|
|
diff -uNr a/fs/squashfs/Makefile b/fs/squashfs/Makefile
|
|
--- a/fs/squashfs/Makefile 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/Makefile 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,8 @@
|
|
+#
|
|
+# Makefile for the linux squashfs routines.
|
|
+#
|
|
+
|
|
+obj-$(CONFIG_SQUASHFS) += squashfs.o
|
|
+squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o
|
|
+squashfs-y += namei.o super.o symlink.o
|
|
+#squashfs-y += squashfs2_0.o
|
|
diff -uNr a/fs/squashfs/namei.c b/fs/squashfs/namei.c
|
|
--- a/fs/squashfs/namei.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/namei.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,200 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * namei.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+static int get_dir_index_using_name(struct super_block *s,
|
|
+ long long *next_block, unsigned int *next_offset,
|
|
+ long long index_start, unsigned int index_offset, int i_count,
|
|
+ const char *name, int size)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ int i, length = 0;
|
|
+ struct squashfs_dir_index *index;
|
|
+ char *str;
|
|
+
|
|
+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
|
|
+
|
|
+ str = kmalloc(sizeof(struct squashfs_dir_index) +
|
|
+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL);
|
|
+ if (str == NULL) {
|
|
+ ERROR("Failed to allocate squashfs_dir_index\n");
|
|
+ goto failure;
|
|
+ }
|
|
+
|
|
+ index = (struct squashfs_dir_index *) (str + SQUASHFS_NAME_LEN + 1);
|
|
+ strncpy(str, name, size);
|
|
+ str[size] = '\0';
|
|
+
|
|
+ for (i = 0; i < i_count; i++) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_index sindex;
|
|
+ squashfs_get_cached_block(s, &sindex, index_start, index_offset,
|
|
+ sizeof(sindex), &index_start, &index_offset);
|
|
+ SQUASHFS_SWAP_DIR_INDEX(index, &sindex);
|
|
+ } else
|
|
+ squashfs_get_cached_block(s, index, index_start, index_offset,
|
|
+ sizeof(struct squashfs_dir_index), &index_start, &index_offset);
|
|
+
|
|
+ squashfs_get_cached_block(s, index->name, index_start, index_offset,
|
|
+ index->size + 1, &index_start, &index_offset);
|
|
+
|
|
+ index->name[index->size + 1] = '\0';
|
|
+
|
|
+ if (strcmp(index->name, str) > 0)
|
|
+ break;
|
|
+
|
|
+ length = index->index;
|
|
+ *next_block = index->start_block + sblk->directory_table_start;
|
|
+ }
|
|
+
|
|
+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
|
|
+ kfree(str);
|
|
+
|
|
+failure:
|
|
+ return length + 3;
|
|
+}
|
|
+
|
|
+
|
|
+static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry,
|
|
+ struct nameidata *nd)
|
|
+{
|
|
+ const unsigned char *name = dentry->d_name.name;
|
|
+ int len = dentry->d_name.len;
|
|
+ struct inode *inode = NULL;
|
|
+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ long long next_block = SQUASHFS_I(i)->start_block +
|
|
+ sblk->directory_table_start;
|
|
+ int next_offset = SQUASHFS_I(i)->offset, length = 0, dir_count;
|
|
+ struct squashfs_dir_header dirh;
|
|
+ struct squashfs_dir_entry *dire;
|
|
+
|
|
+ TRACE("Entered squashfs_lookup [%llx:%x]\n", next_block, next_offset);
|
|
+
|
|
+ dire = kmalloc(sizeof(struct squashfs_dir_entry) +
|
|
+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL);
|
|
+ if (dire == NULL) {
|
|
+ ERROR("Failed to allocate squashfs_dir_entry\n");
|
|
+ goto exit_lookup;
|
|
+ }
|
|
+
|
|
+ if (len > SQUASHFS_NAME_LEN)
|
|
+ goto exit_lookup;
|
|
+
|
|
+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_start,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count, name, len);
|
|
+
|
|
+ while (length < i_size_read(i)) {
|
|
+ /* read directory header */
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_header sdirh;
|
|
+ if (!squashfs_get_cached_block(i->i_sb, &sdirh, next_block,
|
|
+ next_offset, sizeof(sdirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdirh);
|
|
+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, &dirh, next_block,
|
|
+ next_offset, sizeof(dirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(dirh);
|
|
+ }
|
|
+
|
|
+ dir_count = dirh.count + 1;
|
|
+ while (dir_count--) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_entry sdire;
|
|
+ if (!squashfs_get_cached_block(i->i_sb, &sdire, next_block,
|
|
+ next_offset, sizeof(sdire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdire);
|
|
+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, dire, next_block,
|
|
+ next_offset, sizeof(*dire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(*dire);
|
|
+ }
|
|
+
|
|
+ if (!squashfs_get_cached_block(i->i_sb, dire->name, next_block,
|
|
+ next_offset, dire->size + 1, &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += dire->size + 1;
|
|
+
|
|
+ if (name[0] < dire->name[0])
|
|
+ goto exit_lookup;
|
|
+
|
|
+ if ((len == dire->size + 1) && !strncmp(name, dire->name, len)) {
|
|
+ squashfs_inode_t ino = SQUASHFS_MKINODE(dirh.start_block,
|
|
+ dire->offset);
|
|
+
|
|
+ TRACE("calling squashfs_iget for directory entry %s, inode"
|
|
+ " %x:%x, %d\n", name, dirh.start_block, dire->offset,
|
|
+ dirh.inode_number + dire->inode_number);
|
|
+
|
|
+ inode = squashfs_iget(i->i_sb, ino, dirh.inode_number + dire->inode_number);
|
|
+
|
|
+ goto exit_lookup;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+exit_lookup:
|
|
+ kfree(dire);
|
|
+ if (inode)
|
|
+ return d_splice_alias(inode, dentry);
|
|
+ d_add(dentry, inode);
|
|
+ return ERR_PTR(0);
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
|
|
+ next_offset);
|
|
+ goto exit_lookup;
|
|
+}
|
|
+
|
|
+
|
|
+const struct inode_operations squashfs_dir_inode_ops = {
|
|
+ .lookup = squashfs_lookup
|
|
+};
|
|
diff -uNr a/fs/squashfs/squashfs2_0.c b/fs/squashfs/squashfs2_0.c
|
|
--- a/fs/squashfs/squashfs2_0.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/squashfs2_0.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,740 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * squashfs2_0.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir);
|
|
+static struct dentry *squashfs_lookup_2(struct inode *, struct dentry *,
|
|
+ struct nameidata *);
|
|
+
|
|
+static struct file_operations squashfs_dir_ops_2 = {
|
|
+ .read = generic_read_dir,
|
|
+ .readdir = squashfs_readdir_2
|
|
+};
|
|
+
|
|
+static struct inode_operations squashfs_dir_inode_ops_2 = {
|
|
+ .lookup = squashfs_lookup_2
|
|
+};
|
|
+
|
|
+static unsigned char squashfs_filetype_table[] = {
|
|
+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
|
|
+};
|
|
+
|
|
+static int read_fragment_index_table_2(struct super_block *s)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+
|
|
+ if (!(msblk->fragment_index_2 = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES_2
|
|
+ (sblk->fragments), GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate uid/gid table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments) &&
|
|
+ !squashfs_read_data(s, (char *)
|
|
+ msblk->fragment_index_2,
|
|
+ sblk->fragment_table_start,
|
|
+ SQUASHFS_FRAGMENT_INDEX_BYTES_2
|
|
+ (sblk->fragments) |
|
|
+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments))) {
|
|
+ ERROR("unable to read fragment index table\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ int i;
|
|
+ unsigned int fragment;
|
|
+
|
|
+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES_2(sblk->fragments);
|
|
+ i++) {
|
|
+ SQUASHFS_SWAP_FRAGMENT_INDEXES_2((&fragment),
|
|
+ &msblk->fragment_index_2[i], 1);
|
|
+ msblk->fragment_index_2[i] = fragment;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+
|
|
+static int get_fragment_location_2(struct super_block *s, unsigned int fragment,
|
|
+ long long *fragment_start_block,
|
|
+ unsigned int *fragment_size)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ long long start_block =
|
|
+ msblk->fragment_index_2[SQUASHFS_FRAGMENT_INDEX_2(fragment)];
|
|
+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET_2(fragment);
|
|
+ struct squashfs_fragment_entry_2 fragment_entry;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_fragment_entry_2 sfragment_entry;
|
|
+
|
|
+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
|
|
+ start_block, offset,
|
|
+ sizeof(sfragment_entry), &start_block,
|
|
+ &offset))
|
|
+ goto out;
|
|
+ SQUASHFS_SWAP_FRAGMENT_ENTRY_2(&fragment_entry, &sfragment_entry);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
|
|
+ start_block, offset,
|
|
+ sizeof(fragment_entry), &start_block,
|
|
+ &offset))
|
|
+ goto out;
|
|
+
|
|
+ *fragment_start_block = fragment_entry.start_block;
|
|
+ *fragment_size = fragment_entry.size;
|
|
+
|
|
+ return 1;
|
|
+
|
|
+out:
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static void squashfs_new_inode(struct squashfs_sb_info *msblk, struct inode *i,
|
|
+ struct squashfs_base_inode_header_2 *inodeb, unsigned int ino)
|
|
+{
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+
|
|
+ i->i_ino = ino;
|
|
+ i->i_mtime.tv_sec = sblk->mkfs_time;
|
|
+ i->i_atime.tv_sec = sblk->mkfs_time;
|
|
+ i->i_ctime.tv_sec = sblk->mkfs_time;
|
|
+ i->i_uid = msblk->uid[inodeb->uid];
|
|
+ i->i_mode = inodeb->mode;
|
|
+ i->i_nlink = 1;
|
|
+ i->i_size = 0;
|
|
+ if (inodeb->guid == SQUASHFS_GUIDS)
|
|
+ i->i_gid = i->i_uid;
|
|
+ else
|
|
+ i->i_gid = msblk->guid[inodeb->guid];
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_read_inode_2(struct inode *i, squashfs_inode_t inode)
|
|
+{
|
|
+ struct super_block *s = i->i_sb;
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ unsigned int block = SQUASHFS_INODE_BLK(inode) +
|
|
+ sblk->inode_table_start;
|
|
+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
|
|
+ unsigned int ino = SQUASHFS_MK_VFS_INODE(block -
|
|
+ sblk->inode_table_start, offset);
|
|
+ long long next_block;
|
|
+ unsigned int next_offset;
|
|
+ union squashfs_inode_header_2 id, sid;
|
|
+ struct squashfs_base_inode_header_2 *inodeb = &id.base,
|
|
+ *sinodeb = &sid.base;
|
|
+
|
|
+ TRACE("Entered squashfs_read_inode_2\n");
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
|
|
+ offset, sizeof(*sinodeb), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(inodeb, sinodeb,
|
|
+ sizeof(*sinodeb));
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, (char *) inodeb, block,
|
|
+ offset, sizeof(*inodeb), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ squashfs_new_inode(msblk, i, inodeb, ino);
|
|
+
|
|
+ switch(inodeb->inode_type) {
|
|
+ case SQUASHFS_FILE_TYPE: {
|
|
+ struct squashfs_reg_inode_header_2 *inodep = &id.reg;
|
|
+ struct squashfs_reg_inode_header_2 *sinodep = &sid.reg;
|
|
+ long long frag_blk;
|
|
+ unsigned int frag_size = 0;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_REG_INODE_HEADER_2(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ frag_blk = SQUASHFS_INVALID_BLK;
|
|
+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
|
|
+ !get_fragment_location_2(s,
|
|
+ inodep->fragment, &frag_blk, &frag_size))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep->file_size;
|
|
+ i->i_fop = &generic_ro_fops;
|
|
+ i->i_mode |= S_IFREG;
|
|
+ i->i_mtime.tv_sec = inodep->mtime;
|
|
+ i->i_atime.tv_sec = inodep->mtime;
|
|
+ i->i_ctime.tv_sec = inodep->mtime;
|
|
+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
|
|
+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
|
|
+ SQUASHFS_I(i)->start_block = inodep->start_block;
|
|
+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
|
|
+ SQUASHFS_I(i)->offset = next_offset;
|
|
+ i->i_data.a_ops = &squashfs_aops;
|
|
+
|
|
+ TRACE("File inode %x:%x, start_block %x, "
|
|
+ "block_list_start %llx, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep->start_block, next_block,
|
|
+ next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_DIR_TYPE: {
|
|
+ struct squashfs_dir_inode_header_2 *inodep = &id.dir;
|
|
+ struct squashfs_dir_inode_header_2 *sinodep = &sid.dir;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DIR_INODE_HEADER_2(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep->file_size;
|
|
+ i->i_op = &squashfs_dir_inode_ops_2;
|
|
+ i->i_fop = &squashfs_dir_ops_2;
|
|
+ i->i_mode |= S_IFDIR;
|
|
+ i->i_mtime.tv_sec = inodep->mtime;
|
|
+ i->i_atime.tv_sec = inodep->mtime;
|
|
+ i->i_ctime.tv_sec = inodep->mtime;
|
|
+ SQUASHFS_I(i)->start_block = inodep->start_block;
|
|
+ SQUASHFS_I(i)->offset = inodep->offset;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
|
|
+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
|
|
+
|
|
+ TRACE("Directory inode %x:%x, start_block %x, offset "
|
|
+ "%x\n", SQUASHFS_INODE_BLK(inode),
|
|
+ offset, inodep->start_block,
|
|
+ inodep->offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_LDIR_TYPE: {
|
|
+ struct squashfs_ldir_inode_header_2 *inodep = &id.ldir;
|
|
+ struct squashfs_ldir_inode_header_2 *sinodep = &sid.ldir;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_LDIR_INODE_HEADER_2(inodep,
|
|
+ sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep->file_size;
|
|
+ i->i_op = &squashfs_dir_inode_ops_2;
|
|
+ i->i_fop = &squashfs_dir_ops_2;
|
|
+ i->i_mode |= S_IFDIR;
|
|
+ i->i_mtime.tv_sec = inodep->mtime;
|
|
+ i->i_atime.tv_sec = inodep->mtime;
|
|
+ i->i_ctime.tv_sec = inodep->mtime;
|
|
+ SQUASHFS_I(i)->start_block = inodep->start_block;
|
|
+ SQUASHFS_I(i)->offset = inodep->offset;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_offset =
|
|
+ next_offset;
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count =
|
|
+ inodep->i_count;
|
|
+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
|
|
+
|
|
+ TRACE("Long directory inode %x:%x, start_block %x, "
|
|
+ "offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep->start_block, inodep->offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_SYMLINK_TYPE: {
|
|
+ struct squashfs_symlink_inode_header_2 *inodep =
|
|
+ &id.symlink;
|
|
+ struct squashfs_symlink_inode_header_2 *sinodep =
|
|
+ &sid.symlink;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(inodep,
|
|
+ sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep->symlink_size;
|
|
+ i->i_op = &page_symlink_inode_operations;
|
|
+ i->i_data.a_ops = &squashfs_symlink_aops;
|
|
+ i->i_mode |= S_IFLNK;
|
|
+ SQUASHFS_I(i)->start_block = next_block;
|
|
+ SQUASHFS_I(i)->offset = next_offset;
|
|
+
|
|
+ TRACE("Symbolic link inode %x:%x, start_block %llx, "
|
|
+ "offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ next_block, next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_BLKDEV_TYPE:
|
|
+ case SQUASHFS_CHRDEV_TYPE: {
|
|
+ struct squashfs_dev_inode_header_2 *inodep = &id.dev;
|
|
+ struct squashfs_dev_inode_header_2 *sinodep = &sid.dev;
|
|
+
|
|
+ if (msblk->swap) {
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ sinodep, block, offset,
|
|
+ sizeof(*sinodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DEV_INODE_HEADER_2(inodep, sinodep);
|
|
+ } else
|
|
+ if (!squashfs_get_cached_block(s, (char *)
|
|
+ inodep, block, offset,
|
|
+ sizeof(*inodep), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_mode |= (inodeb->inode_type ==
|
|
+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
|
|
+ S_IFBLK;
|
|
+ init_special_inode(i, i->i_mode,
|
|
+ old_decode_dev(inodep->rdev));
|
|
+
|
|
+ TRACE("Device inode %x:%x, rdev %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep->rdev);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_FIFO_TYPE:
|
|
+ case SQUASHFS_SOCKET_TYPE: {
|
|
+
|
|
+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
|
|
+ ? S_IFIFO : S_IFSOCK;
|
|
+ init_special_inode(i, i->i_mode, 0);
|
|
+ break;
|
|
+ }
|
|
+ default:
|
|
+ ERROR("Unknown inode type %d in squashfs_iget!\n",
|
|
+ inodeb->inode_type);
|
|
+ goto failed_read1;
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
|
|
+
|
|
+failed_read1:
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int get_dir_index_using_offset(struct super_block *s, long long
|
|
+ *next_block, unsigned int *next_offset,
|
|
+ long long index_start,
|
|
+ unsigned int index_offset, int i_count,
|
|
+ long long f_pos)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ int i, length = 0;
|
|
+ struct squashfs_dir_index_2 index;
|
|
+
|
|
+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
|
|
+ i_count, (unsigned int) f_pos);
|
|
+
|
|
+ if (f_pos == 0)
|
|
+ goto finish;
|
|
+
|
|
+ for (i = 0; i < i_count; i++) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_index_2 sindex;
|
|
+ squashfs_get_cached_block(s, (char *) &sindex,
|
|
+ index_start, index_offset,
|
|
+ sizeof(sindex), &index_start,
|
|
+ &index_offset);
|
|
+ SQUASHFS_SWAP_DIR_INDEX_2(&index, &sindex);
|
|
+ } else
|
|
+ squashfs_get_cached_block(s, (char *) &index,
|
|
+ index_start, index_offset,
|
|
+ sizeof(index), &index_start,
|
|
+ &index_offset);
|
|
+
|
|
+ if (index.index > f_pos)
|
|
+ break;
|
|
+
|
|
+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
|
|
+ index.size + 1, &index_start,
|
|
+ &index_offset);
|
|
+
|
|
+ length = index.index;
|
|
+ *next_block = index.start_block + sblk->directory_table_start;
|
|
+ }
|
|
+
|
|
+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
|
|
+
|
|
+finish:
|
|
+ return length;
|
|
+}
|
|
+
|
|
+
|
|
+static int get_dir_index_using_name(struct super_block *s, long long
|
|
+ *next_block, unsigned int *next_offset,
|
|
+ long long index_start,
|
|
+ unsigned int index_offset, int i_count,
|
|
+ const char *name, int size)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = s->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ int i, length = 0;
|
|
+ struct squashfs_dir_index_2 *index;
|
|
+ char *str;
|
|
+
|
|
+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
|
|
+
|
|
+ if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
|
|
+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate squashfs_dir_index\n");
|
|
+ goto failure;
|
|
+ }
|
|
+
|
|
+ index = (struct squashfs_dir_index_2 *) (str + SQUASHFS_NAME_LEN + 1);
|
|
+ strncpy(str, name, size);
|
|
+ str[size] = '\0';
|
|
+
|
|
+ for (i = 0; i < i_count; i++) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_index_2 sindex;
|
|
+ squashfs_get_cached_block(s, (char *) &sindex,
|
|
+ index_start, index_offset,
|
|
+ sizeof(sindex), &index_start,
|
|
+ &index_offset);
|
|
+ SQUASHFS_SWAP_DIR_INDEX_2(index, &sindex);
|
|
+ } else
|
|
+ squashfs_get_cached_block(s, (char *) index,
|
|
+ index_start, index_offset,
|
|
+ sizeof(struct squashfs_dir_index_2),
|
|
+ &index_start, &index_offset);
|
|
+
|
|
+ squashfs_get_cached_block(s, index->name, index_start,
|
|
+ index_offset, index->size + 1,
|
|
+ &index_start, &index_offset);
|
|
+
|
|
+ index->name[index->size + 1] = '\0';
|
|
+
|
|
+ if (strcmp(index->name, str) > 0)
|
|
+ break;
|
|
+
|
|
+ length = index->index;
|
|
+ *next_block = index->start_block + sblk->directory_table_start;
|
|
+ }
|
|
+
|
|
+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
|
|
+ kfree(str);
|
|
+failure:
|
|
+ return length;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir)
|
|
+{
|
|
+ struct inode *i = file->f_dentry->d_inode;
|
|
+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ long long next_block = SQUASHFS_I(i)->start_block +
|
|
+ sblk->directory_table_start;
|
|
+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
|
|
+ dir_count;
|
|
+ struct squashfs_dir_header_2 dirh;
|
|
+ struct squashfs_dir_entry_2 *dire;
|
|
+
|
|
+ TRACE("Entered squashfs_readdir_2 [%llx:%x]\n", next_block, next_offset);
|
|
+
|
|
+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
|
|
+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate squashfs_dir_entry\n");
|
|
+ goto finish;
|
|
+ }
|
|
+
|
|
+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_start,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count,
|
|
+ file->f_pos);
|
|
+
|
|
+ while (length < i_size_read(i)) {
|
|
+ /* read directory header */
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_header_2 sdirh;
|
|
+
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
|
|
+ next_block, next_offset, sizeof(sdirh),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdirh);
|
|
+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
|
|
+ next_block, next_offset, sizeof(dirh),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(dirh);
|
|
+ }
|
|
+
|
|
+ dir_count = dirh.count + 1;
|
|
+ while (dir_count--) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_entry_2 sdire;
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *)
|
|
+ &sdire, next_block, next_offset,
|
|
+ sizeof(sdire), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdire);
|
|
+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *)
|
|
+ dire, next_block, next_offset,
|
|
+ sizeof(*dire), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(*dire);
|
|
+ }
|
|
+
|
|
+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
|
|
+ next_block, next_offset,
|
|
+ dire->size + 1, &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += dire->size + 1;
|
|
+
|
|
+ if (file->f_pos >= length)
|
|
+ continue;
|
|
+
|
|
+ dire->name[dire->size + 1] = '\0';
|
|
+
|
|
+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n",
|
|
+ (unsigned int) dirent, dire->name,
|
|
+ dire->size + 1, (int) file->f_pos,
|
|
+ dirh.start_block, dire->offset,
|
|
+ squashfs_filetype_table[dire->type]);
|
|
+
|
|
+ if (filldir(dirent, dire->name, dire->size + 1,
|
|
+ file->f_pos, SQUASHFS_MK_VFS_INODE(
|
|
+ dirh.start_block, dire->offset),
|
|
+ squashfs_filetype_table[dire->type])
|
|
+ < 0) {
|
|
+ TRACE("Filldir returned less than 0\n");
|
|
+ goto finish;
|
|
+ }
|
|
+ file->f_pos = length;
|
|
+ }
|
|
+ }
|
|
+
|
|
+finish:
|
|
+ kfree(dire);
|
|
+ return 0;
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
|
|
+ next_offset);
|
|
+ kfree(dire);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static struct dentry *squashfs_lookup_2(struct inode *i, struct dentry *dentry,
|
|
+ struct nameidata *nd)
|
|
+{
|
|
+ const unsigned char *name = dentry->d_name.name;
|
|
+ int len = dentry->d_name.len;
|
|
+ struct inode *inode = NULL;
|
|
+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+ long long next_block = SQUASHFS_I(i)->start_block +
|
|
+ sblk->directory_table_start;
|
|
+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
|
|
+ dir_count;
|
|
+ struct squashfs_dir_header_2 dirh;
|
|
+ struct squashfs_dir_entry_2 *dire;
|
|
+ int sorted = sblk->s_major == 2 && sblk->s_minor >= 1;
|
|
+
|
|
+ TRACE("Entered squashfs_lookup_2 [%llx:%x]\n", next_block, next_offset);
|
|
+
|
|
+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
|
|
+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate squashfs_dir_entry\n");
|
|
+ goto exit_loop;
|
|
+ }
|
|
+
|
|
+ if (len > SQUASHFS_NAME_LEN)
|
|
+ goto exit_loop;
|
|
+
|
|
+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_start,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_offset,
|
|
+ SQUASHFS_I(i)->u.s2.directory_index_count, name,
|
|
+ len);
|
|
+
|
|
+ while (length < i_size_read(i)) {
|
|
+ /* read directory header */
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_header_2 sdirh;
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
|
|
+ next_block, next_offset, sizeof(sdirh),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdirh);
|
|
+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
|
|
+ next_block, next_offset, sizeof(dirh),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(dirh);
|
|
+ }
|
|
+
|
|
+ dir_count = dirh.count + 1;
|
|
+ while (dir_count--) {
|
|
+ if (msblk->swap) {
|
|
+ struct squashfs_dir_entry_2 sdire;
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *)
|
|
+ &sdire, next_block,next_offset,
|
|
+ sizeof(sdire), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(sdire);
|
|
+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
|
|
+ } else {
|
|
+ if (!squashfs_get_cached_block(i->i_sb, (char *)
|
|
+ dire, next_block,next_offset,
|
|
+ sizeof(*dire), &next_block,
|
|
+ &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += sizeof(*dire);
|
|
+ }
|
|
+
|
|
+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
|
|
+ next_block, next_offset, dire->size + 1,
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ length += dire->size + 1;
|
|
+
|
|
+ if (sorted && name[0] < dire->name[0])
|
|
+ goto exit_loop;
|
|
+
|
|
+ if ((len == dire->size + 1) && !strncmp(name,
|
|
+ dire->name, len)) {
|
|
+ squashfs_inode_t ino =
|
|
+ SQUASHFS_MKINODE(dirh.start_block,
|
|
+ dire->offset);
|
|
+ unsigned int inode_number = SQUASHFS_MK_VFS_INODE(dirh.start_block,
|
|
+ dire->offset);
|
|
+
|
|
+ TRACE("calling squashfs_iget for directory "
|
|
+ "entry %s, inode %x:%x, %lld\n", name,
|
|
+ dirh.start_block, dire->offset, ino);
|
|
+
|
|
+ inode = squashfs_iget(i->i_sb, ino, inode_number);
|
|
+
|
|
+ goto exit_loop;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+exit_loop:
|
|
+ kfree(dire);
|
|
+ d_add(dentry, inode);
|
|
+ return ERR_PTR(0);
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
|
|
+ next_offset);
|
|
+ goto exit_loop;
|
|
+}
|
|
+
|
|
+
|
|
+int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
|
|
+{
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+
|
|
+ msblk->read_inode = squashfs_read_inode_2;
|
|
+ msblk->read_fragment_index_table = read_fragment_index_table_2;
|
|
+
|
|
+ sblk->bytes_used = sblk->bytes_used_2;
|
|
+ sblk->uid_start = sblk->uid_start_2;
|
|
+ sblk->guid_start = sblk->guid_start_2;
|
|
+ sblk->inode_table_start = sblk->inode_table_start_2;
|
|
+ sblk->directory_table_start = sblk->directory_table_start_2;
|
|
+ sblk->fragment_table_start = sblk->fragment_table_start_2;
|
|
+
|
|
+ return 1;
|
|
+}
|
|
diff -uNr a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
|
|
--- a/fs/squashfs/squashfs.h 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/squashfs.h 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,122 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * squashfs.h
|
|
+ */
|
|
+
|
|
+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
|
|
+#undef CONFIG_SQUASHFS_1_0_COMPATIBILITY
|
|
+#endif
|
|
+
|
|
+#ifdef SQUASHFS_TRACE
|
|
+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args)
|
|
+#else
|
|
+#define TRACE(s, args...) {}
|
|
+#endif
|
|
+
|
|
+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args)
|
|
+
|
|
+#define SERROR(s, args...) do { \
|
|
+ if (!silent) \
|
|
+ printk(KERN_ERR "SQUASHFS error: "s, ## args);\
|
|
+ } while(0)
|
|
+
|
|
+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args)
|
|
+
|
|
+static inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode)
|
|
+{
|
|
+ return list_entry(inode, struct squashfs_inode_info, vfs_inode);
|
|
+}
|
|
+
|
|
+/* block.c */
|
|
+extern unsigned int squashfs_read_data(struct super_block *, char *,
|
|
+ long long, unsigned int, long long *, int);
|
|
+extern int squashfs_get_cached_block(struct super_block *, void *,
|
|
+ long long, unsigned int, int, long long *, unsigned int *);
|
|
+
|
|
+/* cache.c */
|
|
+extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *,
|
|
+ struct squashfs_cache *, long long, int);
|
|
+extern void squashfs_cache_put(struct squashfs_cache *,
|
|
+ struct squashfs_cache_entry *);
|
|
+extern void squashfs_cache_delete(struct squashfs_cache *);
|
|
+extern struct squashfs_cache *squashfs_cache_init(char *, int, int, int);
|
|
+
|
|
+/* export.c */
|
|
+extern int read_inode_lookup_table(struct super_block *);
|
|
+
|
|
+/* file.c */
|
|
+extern long long read_blocklist(struct inode *, int, int, char *,
|
|
+ unsigned short **, unsigned int *);
|
|
+
|
|
+/* fragment.c */
|
|
+extern int get_fragment_location(struct super_block *, unsigned int,
|
|
+ long long *, unsigned int *);
|
|
+extern void release_cached_fragment(struct squashfs_sb_info *,
|
|
+ struct squashfs_cache_entry *);
|
|
+extern struct squashfs_cache_entry *get_cached_fragment(struct super_block *,
|
|
+ long long, int);
|
|
+extern int read_fragment_index_table(struct super_block *);
|
|
+
|
|
+/* id.c */
|
|
+extern int get_id(struct super_block *, unsigned int, unsigned int *);
|
|
+extern int read_id_index_table(struct super_block *);
|
|
+
|
|
+/* inode.c */
|
|
+extern struct inode *squashfs_iget(struct super_block *, squashfs_inode_t,
|
|
+ unsigned int);
|
|
+extern int squashfs_read_inode(struct inode *, squashfs_inode_t);
|
|
+
|
|
+/*
|
|
+ * Inodes and files operations
|
|
+ */
|
|
+
|
|
+/* dir.c */
|
|
+extern const struct file_operations squashfs_dir_ops;
|
|
+
|
|
+/* export.c */
|
|
+extern const struct export_operations squashfs_export_ops;
|
|
+
|
|
+/* file.c */
|
|
+extern const struct address_space_operations squashfs_aops;
|
|
+
|
|
+/* namei.c */
|
|
+extern const struct inode_operations squashfs_dir_inode_ops;
|
|
+
|
|
+/* symlink.c */
|
|
+extern const struct address_space_operations squashfs_symlink_aops;
|
|
+
|
|
+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
|
|
+extern int squashfs_1_0_supported(struct squashfs_sb_info *msblk);
|
|
+#else
|
|
+static inline int squashfs_1_0_supported(struct squashfs_sb_info *msblk)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
+
|
|
+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
|
|
+extern int squashfs_2_0_supported(struct squashfs_sb_info *msblk);
|
|
+#else
|
|
+static inline int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
diff -uNr a/fs/squashfs/super.c b/fs/squashfs/super.c
|
|
--- a/fs/squashfs/super.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/super.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,381 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * super.c
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/vmalloc.h>
|
|
+#include <linux/spinlock.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/exportfs.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+static struct file_system_type squashfs_fs_type;
|
|
+static struct super_operations squashfs_super_ops;
|
|
+
|
|
+static int supported_squashfs_filesystem(struct squashfs_sb_info *msblk, int silent)
|
|
+{
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+
|
|
+ msblk->read_inode = squashfs_read_inode;
|
|
+ msblk->read_blocklist = read_blocklist;
|
|
+ msblk->read_fragment_index_table = read_fragment_index_table;
|
|
+
|
|
+ if (sblk->s_major == 1) {
|
|
+ if (!squashfs_1_0_supported(msblk)) {
|
|
+ SERROR("Major/Minor mismatch, Squashfs 1.0 filesystems "
|
|
+ "are unsupported\n");
|
|
+ SERROR("Please recompile with Squashfs 1.0 support enabled\n");
|
|
+ return 0;
|
|
+ }
|
|
+ } else if (sblk->s_major == 2) {
|
|
+ if (!squashfs_2_0_supported(msblk)) {
|
|
+ SERROR("Major/Minor mismatch, Squashfs 2.0 filesystems "
|
|
+ "are unsupported\n");
|
|
+ SERROR("Please recompile with Squashfs 2.0 support enabled\n");
|
|
+ return 0;
|
|
+ }
|
|
+ } else if(sblk->s_major != SQUASHFS_MAJOR || sblk->s_minor >
|
|
+ SQUASHFS_MINOR) {
|
|
+ SERROR("Major/Minor mismatch, trying to mount newer %d.%d "
|
|
+ "filesystem\n", sblk->s_major, sblk->s_minor);
|
|
+ SERROR("Please update your kernel\n");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_fill_super(struct super_block *s, void *data, int silent)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk;
|
|
+ struct squashfs_super_block *sblk;
|
|
+ char b[BDEVNAME_SIZE];
|
|
+ struct inode *root;
|
|
+
|
|
+ TRACE("Entered squashfs_fill_superblock\n");
|
|
+
|
|
+ s->s_fs_info = kzalloc(sizeof(struct squashfs_sb_info), GFP_KERNEL);
|
|
+ if (s->s_fs_info == NULL) {
|
|
+ ERROR("Failed to allocate superblock\n");
|
|
+ goto failure;
|
|
+ }
|
|
+ msblk = s->s_fs_info;
|
|
+
|
|
+ msblk->stream.workspace = vmalloc(zlib_inflate_workspacesize());
|
|
+ if (msblk->stream.workspace == NULL) {
|
|
+ ERROR("Failed to allocate zlib workspace\n");
|
|
+ goto failure;
|
|
+ }
|
|
+ sblk = &msblk->sblk;
|
|
+
|
|
+ msblk->devblksize = sb_min_blocksize(s, BLOCK_SIZE);
|
|
+ msblk->devblksize_log2 = ffz(~msblk->devblksize);
|
|
+
|
|
+ mutex_init(&msblk->read_data_mutex);
|
|
+ mutex_init(&msblk->read_page_mutex);
|
|
+ mutex_init(&msblk->meta_index_mutex);
|
|
+
|
|
+ /* sblk->bytes_used is checked in squashfs_read_data to ensure reads are not
|
|
+ * beyond filesystem end. As we're using squashfs_read_data to read sblk here,
|
|
+ * first set sblk->bytes_used to a useful value */
|
|
+ sblk->bytes_used = sizeof(struct squashfs_super_block);
|
|
+ if (!squashfs_read_data(s, (char *) sblk, SQUASHFS_START,
|
|
+ sizeof(struct squashfs_super_block) |
|
|
+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, sizeof(struct squashfs_super_block))) {
|
|
+ SERROR("unable to read superblock\n");
|
|
+ goto failed_mount;
|
|
+ }
|
|
+
|
|
+ /* Check it is a SQUASHFS superblock */
|
|
+ if ((s->s_magic = sblk->s_magic) != SQUASHFS_MAGIC) {
|
|
+ if (sblk->s_magic == SQUASHFS_MAGIC_SWAP) {
|
|
+ struct squashfs_super_block ssblk;
|
|
+
|
|
+ WARNING("Mounting a different endian SQUASHFS filesystem on %s\n",
|
|
+ bdevname(s->s_bdev, b));
|
|
+
|
|
+ //SQUASHFS_SWAP_SUPER_BLOCK(&ssblk, sblk);
|
|
+ memcpy(sblk, &ssblk, sizeof(struct squashfs_super_block));
|
|
+ msblk->swap = 1;
|
|
+ } else {
|
|
+ SERROR("Can't find a SQUASHFS superblock on %s\n",
|
|
+ bdevname(s->s_bdev, b));
|
|
+ goto failed_mount;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Check the MAJOR & MINOR versions */
|
|
+ if(!supported_squashfs_filesystem(msblk, silent))
|
|
+ goto failed_mount;
|
|
+
|
|
+ /* Check the filesystem does not extend beyond the end of the
|
|
+ block device */
|
|
+ if(sblk->bytes_used < 0 || sblk->bytes_used > i_size_read(s->s_bdev->bd_inode))
|
|
+ goto failed_mount;
|
|
+
|
|
+ /* Check the root inode for sanity */
|
|
+ if (SQUASHFS_INODE_OFFSET(sblk->root_inode) > SQUASHFS_METADATA_SIZE)
|
|
+ goto failed_mount;
|
|
+
|
|
+ TRACE("Found valid superblock on %s\n", bdevname(s->s_bdev, b));
|
|
+ TRACE("Inodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(sblk->flags)
|
|
+ ? "un" : "");
|
|
+ TRACE("Data is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(sblk->flags)
|
|
+ ? "un" : "");
|
|
+ TRACE("Check data is %spresent in the filesystem\n",
|
|
+ SQUASHFS_CHECK_DATA(sblk->flags) ? "" : "not ");
|
|
+ TRACE("Filesystem size %lld bytes\n", sblk->bytes_used);
|
|
+ TRACE("Block size %d\n", sblk->block_size);
|
|
+ TRACE("Number of inodes %d\n", sblk->inodes);
|
|
+ if (sblk->s_major > 1)
|
|
+ TRACE("Number of fragments %d\n", sblk->fragments);
|
|
+ TRACE("Number of ids %d\n", sblk->no_ids);
|
|
+ TRACE("sblk->inode_table_start %llx\n", sblk->inode_table_start);
|
|
+ TRACE("sblk->directory_table_start %llx\n", sblk->directory_table_start);
|
|
+ if (sblk->s_major > 1)
|
|
+ TRACE("sblk->fragment_table_start %llx\n", sblk->fragment_table_start);
|
|
+ TRACE("sblk->id_table_start %llx\n", sblk->id_table_start);
|
|
+
|
|
+ s->s_maxbytes = MAX_LFS_FILESIZE;
|
|
+ s->s_flags |= MS_RDONLY;
|
|
+ s->s_op = &squashfs_super_ops;
|
|
+
|
|
+ msblk->block_cache = squashfs_cache_init("metadata", SQUASHFS_CACHED_BLKS,
|
|
+ SQUASHFS_METADATA_SIZE, 0);
|
|
+ if (msblk->block_cache == NULL)
|
|
+ goto failed_mount;
|
|
+
|
|
+ /* Allocate read_page block */
|
|
+ msblk->read_page = vmalloc(sblk->block_size);
|
|
+ if (msblk->read_page == NULL) {
|
|
+ ERROR("Failed to allocate read_page block\n");
|
|
+ goto failed_mount;
|
|
+ }
|
|
+
|
|
+ /* Allocate and read id index table */
|
|
+ if (read_id_index_table(s) == 0)
|
|
+ goto failed_mount;
|
|
+
|
|
+ if (sblk->s_major == 1 && squashfs_1_0_supported(msblk))
|
|
+ goto allocate_root;
|
|
+
|
|
+ msblk->fragment_cache = squashfs_cache_init("fragment",
|
|
+ SQUASHFS_CACHED_FRAGMENTS, sblk->block_size, 1);
|
|
+ if (msblk->fragment_cache == NULL)
|
|
+ goto failed_mount;
|
|
+
|
|
+ /* Allocate and read fragment index table */
|
|
+ if (msblk->read_fragment_index_table(s) == 0)
|
|
+ goto failed_mount;
|
|
+
|
|
+ if(sblk->s_major < 3 || sblk->lookup_table_start == SQUASHFS_INVALID_BLK)
|
|
+ goto allocate_root;
|
|
+
|
|
+ /* Allocate and read inode lookup table */
|
|
+ if (read_inode_lookup_table(s) == 0)
|
|
+ goto failed_mount;
|
|
+
|
|
+ s->s_export_op = &squashfs_export_ops;
|
|
+
|
|
+allocate_root:
|
|
+ root = new_inode(s);
|
|
+ if ((msblk->read_inode)(root, sblk->root_inode) == 0)
|
|
+ goto failed_mount;
|
|
+ insert_inode_hash(root);
|
|
+
|
|
+ s->s_root = d_alloc_root(root);
|
|
+ if (s->s_root == NULL) {
|
|
+ ERROR("Root inode create failed\n");
|
|
+ iput(root);
|
|
+ goto failed_mount;
|
|
+ }
|
|
+
|
|
+ TRACE("Leaving squashfs_fill_super\n");
|
|
+ return 0;
|
|
+
|
|
+failed_mount:
|
|
+ kfree(msblk->inode_lookup_table);
|
|
+ kfree(msblk->fragment_index);
|
|
+ squashfs_cache_delete(msblk->fragment_cache);
|
|
+ kfree(msblk->id_table);
|
|
+ vfree(msblk->read_page);
|
|
+ squashfs_cache_delete(msblk->block_cache);
|
|
+ kfree(msblk->fragment_index_2);
|
|
+ vfree(msblk->stream.workspace);
|
|
+ kfree(s->s_fs_info);
|
|
+ s->s_fs_info = NULL;
|
|
+ return -EINVAL;
|
|
+
|
|
+failure:
|
|
+ return -ENOMEM;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
+{
|
|
+ struct squashfs_sb_info *msblk = dentry->d_sb->s_fs_info;
|
|
+ struct squashfs_super_block *sblk = &msblk->sblk;
|
|
+
|
|
+ TRACE("Entered squashfs_statfs\n");
|
|
+
|
|
+ buf->f_type = SQUASHFS_MAGIC;
|
|
+ buf->f_bsize = sblk->block_size;
|
|
+ buf->f_blocks = ((sblk->bytes_used - 1) >> sblk->block_log) + 1;
|
|
+ buf->f_bfree = buf->f_bavail = 0;
|
|
+ buf->f_files = sblk->inodes;
|
|
+ buf->f_ffree = 0;
|
|
+ buf->f_namelen = SQUASHFS_NAME_LEN;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_remount(struct super_block *s, int *flags, char *data)
|
|
+{
|
|
+ *flags |= MS_RDONLY;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static void squashfs_put_super(struct super_block *s)
|
|
+{
|
|
+ if (s->s_fs_info) {
|
|
+ struct squashfs_sb_info *sbi = s->s_fs_info;
|
|
+ squashfs_cache_delete(sbi->block_cache);
|
|
+ squashfs_cache_delete(sbi->fragment_cache);
|
|
+ vfree(sbi->read_page);
|
|
+ kfree(sbi->id_table);
|
|
+ kfree(sbi->fragment_index);
|
|
+ kfree(sbi->fragment_index_2);
|
|
+ kfree(sbi->meta_index);
|
|
+ vfree(sbi->stream.workspace);
|
|
+ kfree(s->s_fs_info);
|
|
+ s->s_fs_info = NULL;
|
|
+ }
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_get_sb(struct file_system_type *fs_type, int flags,
|
|
+ const char *dev_name, void *data, struct vfsmount *mnt)
|
|
+{
|
|
+ return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super,
|
|
+ mnt);
|
|
+}
|
|
+
|
|
+
|
|
+static struct kmem_cache * squashfs_inode_cachep;
|
|
+
|
|
+
|
|
+static void init_once(void *foo)
|
|
+{
|
|
+ struct squashfs_inode_info *ei = foo;
|
|
+
|
|
+ inode_init_once(&ei->vfs_inode);
|
|
+}
|
|
+
|
|
+
|
|
+static int __init init_inodecache(void)
|
|
+{
|
|
+ squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache",
|
|
+ sizeof(struct squashfs_inode_info), 0,
|
|
+ SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT, init_once);
|
|
+ if (squashfs_inode_cachep == NULL)
|
|
+ return -ENOMEM;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static void destroy_inodecache(void)
|
|
+{
|
|
+ kmem_cache_destroy(squashfs_inode_cachep);
|
|
+}
|
|
+
|
|
+
|
|
+static int __init init_squashfs_fs(void)
|
|
+{
|
|
+ int err = init_inodecache();
|
|
+ if (err)
|
|
+ goto out;
|
|
+
|
|
+ printk(KERN_INFO "squashfs: version 4.0-CVS (2008/07/27) "
|
|
+ "Phillip Lougher\n");
|
|
+
|
|
+ err = register_filesystem(&squashfs_fs_type);
|
|
+ if (err)
|
|
+ destroy_inodecache();
|
|
+
|
|
+out:
|
|
+ return err;
|
|
+}
|
|
+
|
|
+
|
|
+static void __exit exit_squashfs_fs(void)
|
|
+{
|
|
+ unregister_filesystem(&squashfs_fs_type);
|
|
+ destroy_inodecache();
|
|
+}
|
|
+
|
|
+
|
|
+static struct inode *squashfs_alloc_inode(struct super_block *sb)
|
|
+{
|
|
+ struct squashfs_inode_info *ei;
|
|
+ ei = kmem_cache_alloc(squashfs_inode_cachep, GFP_KERNEL);
|
|
+ return ei ? &ei->vfs_inode : NULL;
|
|
+}
|
|
+
|
|
+
|
|
+static void squashfs_destroy_inode(struct inode *inode)
|
|
+{
|
|
+ kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode));
|
|
+}
|
|
+
|
|
+
|
|
+static struct file_system_type squashfs_fs_type = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .name = "squashfs",
|
|
+ .get_sb = squashfs_get_sb,
|
|
+ .kill_sb = kill_block_super,
|
|
+ .fs_flags = FS_REQUIRES_DEV
|
|
+};
|
|
+
|
|
+static struct super_operations squashfs_super_ops = {
|
|
+ .alloc_inode = squashfs_alloc_inode,
|
|
+ .destroy_inode = squashfs_destroy_inode,
|
|
+ .statfs = squashfs_statfs,
|
|
+ .put_super = squashfs_put_super,
|
|
+ .remount_fs = squashfs_remount
|
|
+};
|
|
+
|
|
+module_init(init_squashfs_fs);
|
|
+module_exit(exit_squashfs_fs);
|
|
+MODULE_DESCRIPTION("squashfs 4.0-CVS, a compressed read-only filesystem");
|
|
+MODULE_AUTHOR("Phillip Lougher <phillip@lougher.demon.co.uk>");
|
|
+MODULE_LICENSE("GPL");
|
|
diff -uNr a/fs/squashfs/symlink.c b/fs/squashfs/symlink.c
|
|
--- a/fs/squashfs/symlink.c 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/fs/squashfs/symlink.c 2008-08-13 16:14:50.000000000 -0700
|
|
@@ -0,0 +1,85 @@
|
|
+/*
|
|
+ * Squashfs - a compressed read only filesystem for Linux
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * symlink.c
|
|
+ */
|
|
+
|
|
+#include <linux/fs.h>
|
|
+#include <linux/vfs.h>
|
|
+#include <linux/zlib.h>
|
|
+#include <linux/buffer_head.h>
|
|
+#include <linux/squashfs_fs.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
+
|
|
+#include "squashfs.h"
|
|
+
|
|
+static int squashfs_symlink_readpage(struct file *file, struct page *page)
|
|
+{
|
|
+ struct inode *inode = page->mapping->host;
|
|
+ int index = page->index << PAGE_CACHE_SHIFT;
|
|
+ long long block = SQUASHFS_I(inode)->start_block;
|
|
+ int offset = SQUASHFS_I(inode)->offset;
|
|
+ void *pageaddr = kmap(page);
|
|
+ int length, bytes, avail_bytes;
|
|
+
|
|
+ TRACE("Entered squashfs_symlink_readpage, page index %ld, start block "
|
|
+ "%llx, offset %x\n", page->index,
|
|
+ SQUASHFS_I(inode)->start_block,
|
|
+ SQUASHFS_I(inode)->offset);
|
|
+
|
|
+ for (length = 0; length < index; length += bytes) {
|
|
+ bytes = squashfs_get_cached_block(inode->i_sb, NULL, block,
|
|
+ offset, PAGE_CACHE_SIZE, &block, &offset);
|
|
+ if (bytes == 0) {
|
|
+ ERROR("Unable to read symbolic link [%llx:%x]\n",
|
|
+ block, offset);
|
|
+ goto skip_read;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (length != index) {
|
|
+ ERROR("(squashfs_symlink_readpage) length != index\n");
|
|
+ bytes = 0;
|
|
+ goto skip_read;
|
|
+ }
|
|
+
|
|
+ avail_bytes = min_t(int, i_size_read(inode) - length, PAGE_CACHE_SIZE);
|
|
+
|
|
+ bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block, offset,
|
|
+ avail_bytes, &block, &offset);
|
|
+ if (bytes == 0)
|
|
+ ERROR("Unable to read symbolic link [%llx:%x]\n", block,
|
|
+ offset);
|
|
+
|
|
+skip_read:
|
|
+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
|
|
+ kunmap(page);
|
|
+ flush_dcache_page(page);
|
|
+ SetPageUptodate(page);
|
|
+ unlock_page(page);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+const struct address_space_operations squashfs_symlink_aops = {
|
|
+ .readpage = squashfs_symlink_readpage
|
|
+};
|
|
diff -uNr a/include/linux/squashfs_fs.h b/include/linux/squashfs_fs.h
|
|
--- a/include/linux/squashfs_fs.h 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/include/linux/squashfs_fs.h 2008-08-13 16:16:05.000000000 -0700
|
|
@@ -0,0 +1,949 @@
|
|
+#ifndef SQUASHFS_FS
|
|
+#define SQUASHFS_FS
|
|
+/*
|
|
+ * Squashfs
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * squashfs_fs.h
|
|
+ */
|
|
+
|
|
+#if 0
|
|
+#ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY
|
|
+#define CONFIG_SQUASHFS_2_0_COMPATIBILITY
|
|
+#endif
|
|
+#endif
|
|
+
|
|
+#define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
|
|
+#define SQUASHFS_MAJOR 4
|
|
+#define SQUASHFS_MINOR 0
|
|
+#define SQUASHFS_MAGIC 0x73717368
|
|
+#define SQUASHFS_MAGIC_SWAP 0x68737173
|
|
+#define SQUASHFS_START 0
|
|
+
|
|
+/* size of metadata (inode and directory) blocks */
|
|
+#define SQUASHFS_METADATA_SIZE 8192
|
|
+#define SQUASHFS_METADATA_LOG 13
|
|
+
|
|
+/* default size of data blocks */
|
|
+#define SQUASHFS_FILE_SIZE 131072
|
|
+#define SQUASHFS_FILE_LOG 17
|
|
+
|
|
+#define SQUASHFS_FILE_MAX_SIZE 1048576
|
|
+
|
|
+/* Max number of uids and gids */
|
|
+#define SQUASHFS_IDS 65536
|
|
+
|
|
+/* Max length of filename (not 255) */
|
|
+#define SQUASHFS_NAME_LEN 256
|
|
+
|
|
+#define SQUASHFS_INVALID ((long long) 0xffffffffffff)
|
|
+#define SQUASHFS_INVALID_FRAG ((unsigned int) 0xffffffff)
|
|
+#define SQUASHFS_INVALID_BLK ((long long) -1)
|
|
+#define SQUASHFS_USED_BLK ((long long) -2)
|
|
+
|
|
+/* Filesystem flags */
|
|
+#define SQUASHFS_NOI 0
|
|
+#define SQUASHFS_NOD 1
|
|
+#define SQUASHFS_CHECK 2
|
|
+#define SQUASHFS_NOF 3
|
|
+#define SQUASHFS_NO_FRAG 4
|
|
+#define SQUASHFS_ALWAYS_FRAG 5
|
|
+#define SQUASHFS_DUPLICATE 6
|
|
+#define SQUASHFS_EXPORT 7
|
|
+
|
|
+#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1)
|
|
+
|
|
+#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_NOI)
|
|
+
|
|
+#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_NOD)
|
|
+
|
|
+#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_NOF)
|
|
+
|
|
+#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_NO_FRAG)
|
|
+
|
|
+#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_ALWAYS_FRAG)
|
|
+
|
|
+#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_DUPLICATE)
|
|
+
|
|
+#define SQUASHFS_EXPORTABLE(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_EXPORT)
|
|
+
|
|
+#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \
|
|
+ SQUASHFS_CHECK)
|
|
+
|
|
+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \
|
|
+ duplicate_checking, exportable) (noi | (nod << 1) | (check_data << 2) \
|
|
+ | (nof << 3) | (no_frag << 4) | (always_frag << 5) | \
|
|
+ (duplicate_checking << 6) | (exportable << 7))
|
|
+
|
|
+/* Max number of types and file types */
|
|
+#define SQUASHFS_DIR_TYPE 1
|
|
+#define SQUASHFS_FILE_TYPE 2
|
|
+#define SQUASHFS_SYMLINK_TYPE 3
|
|
+#define SQUASHFS_BLKDEV_TYPE 4
|
|
+#define SQUASHFS_CHRDEV_TYPE 5
|
|
+#define SQUASHFS_FIFO_TYPE 6
|
|
+#define SQUASHFS_SOCKET_TYPE 7
|
|
+#define SQUASHFS_LDIR_TYPE 8
|
|
+#define SQUASHFS_LREG_TYPE 9
|
|
+
|
|
+/* 1.0 filesystem type definitions */
|
|
+#define SQUASHFS_TYPES 5
|
|
+#define SQUASHFS_IPC_TYPE 0
|
|
+
|
|
+/* Flag whether block is compressed or uncompressed, bit is set if block is
|
|
+ * uncompressed */
|
|
+#define SQUASHFS_COMPRESSED_BIT (1 << 15)
|
|
+
|
|
+#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
|
|
+ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT)
|
|
+
|
|
+#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT))
|
|
+
|
|
+#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24)
|
|
+
|
|
+#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) ((B) & \
|
|
+ ~SQUASHFS_COMPRESSED_BIT_BLOCK)
|
|
+
|
|
+#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
|
|
+
|
|
+/*
|
|
+ * Inode number ops. Inodes consist of a compressed block number, and an
|
|
+ * uncompressed offset within that block
|
|
+ */
|
|
+#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16))
|
|
+
|
|
+#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff))
|
|
+
|
|
+#define SQUASHFS_MKINODE(A, B) ((squashfs_inode_t)(((squashfs_inode_t) (A)\
|
|
+ << 16) + (B)))
|
|
+
|
|
+/* Compute 32 bit VFS inode number from squashfs inode number */
|
|
+#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + \
|
|
+ ((b) >> 2) + 1))
|
|
+/* XXX */
|
|
+
|
|
+/* Translate between VFS mode and squashfs mode */
|
|
+#define SQUASHFS_MODE(a) ((a) & 0xfff)
|
|
+
|
|
+/* fragment and fragment table defines */
|
|
+#define SQUASHFS_FRAGMENT_BYTES(A) ((A) * sizeof(struct squashfs_fragment_entry))
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + \
|
|
+ SQUASHFS_METADATA_SIZE - 1) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) *\
|
|
+ sizeof(long long))
|
|
+
|
|
+/* inode lookup table defines */
|
|
+#define SQUASHFS_LOOKUP_BYTES(A) ((A) * sizeof(squashfs_inode_t))
|
|
+
|
|
+#define SQUASHFS_LOOKUP_BLOCK(A) (SQUASHFS_LOOKUP_BYTES(A) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_LOOKUP_BLOCK_OFFSET(A) (SQUASHFS_LOOKUP_BYTES(A) % \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_LOOKUP_BLOCKS(A) ((SQUASHFS_LOOKUP_BYTES(A) + \
|
|
+ SQUASHFS_METADATA_SIZE - 1) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_LOOKUP_BLOCK_BYTES(A) (SQUASHFS_LOOKUP_BLOCKS(A) *\
|
|
+ sizeof(long long))
|
|
+
|
|
+/* uid lookup table defines */
|
|
+#define SQUASHFS_ID_BYTES(A) ((A) * sizeof(unsigned int))
|
|
+
|
|
+#define SQUASHFS_ID_BLOCK(A) (SQUASHFS_ID_BYTES(A) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_ID_BLOCK_OFFSET(A) (SQUASHFS_ID_BYTES(A) % \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_ID_BLOCKS(A) ((SQUASHFS_ID_BYTES(A) + \
|
|
+ SQUASHFS_METADATA_SIZE - 1) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_ID_BLOCK_BYTES(A) (SQUASHFS_ID_BLOCKS(A) *\
|
|
+ sizeof(long long))
|
|
+
|
|
+/* cached data constants for filesystem */
|
|
+#define SQUASHFS_CACHED_BLKS 8
|
|
+
|
|
+#define SQUASHFS_MAX_FILE_SIZE_LOG 64
|
|
+
|
|
+#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << \
|
|
+ (SQUASHFS_MAX_FILE_SIZE_LOG - 2))
|
|
+
|
|
+#define SQUASHFS_MARKER_BYTE 0xff
|
|
+
|
|
+/* meta index cache */
|
|
+#define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
|
|
+#define SQUASHFS_META_ENTRIES 31
|
|
+#define SQUASHFS_META_NUMBER 8
|
|
+#define SQUASHFS_SLOTS 4
|
|
+
|
|
+struct meta_entry {
|
|
+ long long data_block;
|
|
+ unsigned int index_block;
|
|
+ unsigned short offset;
|
|
+ unsigned short pad;
|
|
+};
|
|
+
|
|
+struct meta_index {
|
|
+ unsigned int inode_number;
|
|
+ unsigned int offset;
|
|
+ unsigned short entries;
|
|
+ unsigned short skip;
|
|
+ unsigned short locked;
|
|
+ unsigned short pad;
|
|
+ struct meta_entry meta_entry[SQUASHFS_META_ENTRIES];
|
|
+};
|
|
+
|
|
+
|
|
+/*
|
|
+ * definitions for structures on disk
|
|
+ */
|
|
+
|
|
+typedef long long squashfs_block_t;
|
|
+typedef long long squashfs_inode_t;
|
|
+
|
|
+#define COMPRESSION_ZLIB 1
|
|
+
|
|
+struct squashfs_super_block {
|
|
+ unsigned int s_magic;
|
|
+ unsigned int inodes;
|
|
+ unsigned int mkfs_time /* time of filesystem creation */;
|
|
+ unsigned int block_size;
|
|
+ unsigned int fragments;
|
|
+ unsigned short compression;
|
|
+ unsigned short block_log;
|
|
+ unsigned short flags;
|
|
+ unsigned short no_ids;
|
|
+ unsigned short s_major;
|
|
+ unsigned short s_minor;
|
|
+ squashfs_inode_t root_inode;
|
|
+ long long bytes_used;
|
|
+ long long id_table_start;
|
|
+ long long xattr_table_start;
|
|
+ long long inode_table_start;
|
|
+ long long directory_table_start;
|
|
+ long long fragment_table_start;
|
|
+ long long lookup_table_start;
|
|
+};
|
|
+
|
|
+struct squashfs_dir_index {
|
|
+ unsigned int index;
|
|
+ unsigned int start_block;
|
|
+ unsigned int size;
|
|
+ unsigned char name[0];
|
|
+};
|
|
+
|
|
+#define SQUASHFS_BASE_INODE_HEADER \
|
|
+ unsigned short inode_type; \
|
|
+ unsigned short mode; \
|
|
+ unsigned short uid; \
|
|
+ unsigned short guid; \
|
|
+ unsigned int mtime; \
|
|
+ unsigned int inode_number;
|
|
+
|
|
+struct squashfs_base_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+};
|
|
+
|
|
+struct squashfs_ipc_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+ unsigned int nlink;
|
|
+};
|
|
+
|
|
+struct squashfs_dev_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+ unsigned int nlink;
|
|
+ unsigned int rdev;
|
|
+};
|
|
+
|
|
+struct squashfs_symlink_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+ unsigned int nlink;
|
|
+ unsigned int symlink_size;
|
|
+ char symlink[0];
|
|
+};
|
|
+
|
|
+struct squashfs_reg_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+ unsigned int start_block;
|
|
+ unsigned int fragment;
|
|
+ unsigned int offset;
|
|
+ unsigned int file_size;
|
|
+ unsigned short block_list[0];
|
|
+};
|
|
+
|
|
+struct squashfs_lreg_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+ squashfs_block_t start_block;
|
|
+ long long file_size;
|
|
+ long long sparse;
|
|
+ unsigned int nlink;
|
|
+ unsigned int fragment;
|
|
+ unsigned int offset;
|
|
+ unsigned int xattr;
|
|
+ unsigned short block_list[0];
|
|
+};
|
|
+
|
|
+struct squashfs_dir_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+ unsigned int start_block;
|
|
+ unsigned int nlink;
|
|
+ unsigned short file_size;
|
|
+ unsigned short offset;
|
|
+ unsigned int parent_inode;
|
|
+};
|
|
+
|
|
+struct squashfs_ldir_inode_header {
|
|
+ SQUASHFS_BASE_INODE_HEADER;
|
|
+ unsigned int nlink;
|
|
+ unsigned int file_size;
|
|
+ unsigned int start_block;
|
|
+ unsigned int parent_inode;
|
|
+ unsigned short i_count;
|
|
+ unsigned short offset;
|
|
+ struct squashfs_dir_index index[0];
|
|
+};
|
|
+
|
|
+union squashfs_inode_header {
|
|
+ struct squashfs_base_inode_header base;
|
|
+ struct squashfs_dev_inode_header dev;
|
|
+ struct squashfs_symlink_inode_header symlink;
|
|
+ struct squashfs_reg_inode_header reg;
|
|
+ struct squashfs_lreg_inode_header lreg;
|
|
+ struct squashfs_dir_inode_header dir;
|
|
+ struct squashfs_ldir_inode_header ldir;
|
|
+ struct squashfs_ipc_inode_header ipc;
|
|
+};
|
|
+
|
|
+struct squashfs_dir_entry {
|
|
+ unsigned short offset;
|
|
+ short inode_number;
|
|
+ unsigned short type;
|
|
+ unsigned short size;
|
|
+ char name[0];
|
|
+};
|
|
+
|
|
+struct squashfs_dir_header {
|
|
+ unsigned int count;
|
|
+ unsigned int start_block;
|
|
+ unsigned int inode_number;
|
|
+};
|
|
+
|
|
+struct squashfs_fragment_entry {
|
|
+ long long start_block;
|
|
+ unsigned int size;
|
|
+ unsigned int unused;
|
|
+};
|
|
+
|
|
+extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen);
|
|
+extern int squashfs_uncompress_init(void);
|
|
+extern int squashfs_uncompress_exit(void);
|
|
+
|
|
+/*
|
|
+ * macros to convert each packed bitfield structure from little endian to big
|
|
+ * endian and vice versa. These are needed when creating or using a filesystem
|
|
+ * on a machine with different byte ordering to the target architecture.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#define SQUASHFS_SWAP_START \
|
|
+ int bits;\
|
|
+ int b_pos;\
|
|
+ unsigned long long val;\
|
|
+ unsigned char *s;\
|
|
+ unsigned char *d;
|
|
+
|
|
+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\
|
|
+ SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
|
|
+ SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
|
|
+ SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\
|
|
+ SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\
|
|
+ SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\
|
|
+ SQUASHFS_SWAP((s)->directory_table_start_2, d, 192, 32);\
|
|
+ SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
|
|
+ SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
|
|
+ SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
|
|
+ SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
|
|
+ SQUASHFS_SWAP((s)->flags, d, 288, 8);\
|
|
+ SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
|
|
+ SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
|
|
+ SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
|
|
+ SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
|
|
+ SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
|
|
+ SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
|
|
+ SQUASHFS_SWAP((s)->fragment_table_start_2, d, 472, 32);\
|
|
+ SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\
|
|
+ SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\
|
|
+ SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\
|
|
+ SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\
|
|
+ SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\
|
|
+ SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\
|
|
+ SQUASHFS_SWAP((s)->lookup_table_start, d, 888, 64);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
|
|
+ SQUASHFS_MEMSET(s, d, n);\
|
|
+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
|
|
+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
|
|
+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
|
|
+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
|
|
+ SQUASHFS_SWAP((s)->inode_number, d, 64, 32);
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
|
|
+ sizeof(struct squashfs_ipc_inode_header))\
|
|
+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
|
|
+ sizeof(struct squashfs_dev_inode_header)); \
|
|
+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->rdev, d, 128, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
|
|
+ sizeof(struct squashfs_symlink_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
|
|
+ sizeof(struct squashfs_reg_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 96, 64);\
|
|
+ SQUASHFS_SWAP((s)->fragment, d, 160, 32);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 192, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 224, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_LREG_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
|
|
+ sizeof(struct squashfs_lreg_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 128, 64);\
|
|
+ SQUASHFS_SWAP((s)->fragment, d, 192, 32);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 224, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 256, 64);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
|
|
+ sizeof(struct squashfs_dir_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 128, 19);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 147, 13);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 160, 32);\
|
|
+ SQUASHFS_SWAP((s)->parent_inode, d, 192, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_LDIR_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
|
|
+ sizeof(struct squashfs_ldir_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 128, 27);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 155, 13);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 168, 32);\
|
|
+ SQUASHFS_SWAP((s)->i_count, d, 200, 16);\
|
|
+ SQUASHFS_SWAP((s)->parent_inode, d, 216, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_INDEX(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index));\
|
|
+ SQUASHFS_SWAP((s)->index, d, 0, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 32, 32);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 64, 8);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header));\
|
|
+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 8, 32);\
|
|
+ SQUASHFS_SWAP((s)->inode_number, d, 40, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry));\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
|
|
+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
|
|
+ SQUASHFS_SWAP((s)->inode_number, d, 24, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry));\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 0, 64);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 64, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_INODE_T(s, d) SQUASHFS_SWAP_LONG_LONGS(s, d, 1)
|
|
+
|
|
+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\
|
|
+ int entry;\
|
|
+ int bit_position;\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, n * 2);\
|
|
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
|
|
+ 16)\
|
|
+ SQUASHFS_SWAP(s[entry], d, bit_position, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_INTS(s, d, n) {\
|
|
+ int entry;\
|
|
+ int bit_position;\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, n * 4);\
|
|
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
|
|
+ 32)\
|
|
+ SQUASHFS_SWAP(s[entry], d, bit_position, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_LONG_LONGS(s, d, n) {\
|
|
+ int entry;\
|
|
+ int bit_position;\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, n * 8);\
|
|
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
|
|
+ 64)\
|
|
+ SQUASHFS_SWAP(s[entry], d, bit_position, 64);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
|
|
+ int entry;\
|
|
+ int bit_position;\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, n * bits / 8);\
|
|
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
|
|
+ bits)\
|
|
+ SQUASHFS_SWAP(s[entry], d, bit_position, bits);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_FRAGMENT_INDEXES(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
|
|
+#define SQUASHFS_SWAP_LOOKUP_BLOCKS(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
|
|
+#define SQUASHFS_SWAP_ID_BLOCKS(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
|
|
+
|
|
+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
|
|
+
|
|
+struct squashfs_base_inode_header_1 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_ipc_inode_header_1 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned int type:4;
|
|
+ unsigned int offset:4;
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_dev_inode_header_1 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned short rdev;
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_symlink_inode_header_1 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned short symlink_size;
|
|
+ char symlink[0];
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_reg_inode_header_1 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned int mtime;
|
|
+ unsigned int start_block;
|
|
+ unsigned int file_size:32;
|
|
+ unsigned short block_list[0];
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_dir_inode_header_1 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned int file_size:19;
|
|
+ unsigned int offset:13;
|
|
+ unsigned int mtime;
|
|
+ unsigned int start_block:24;
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+union squashfs_inode_header_1 {
|
|
+ struct squashfs_base_inode_header_1 base;
|
|
+ struct squashfs_dev_inode_header_1 dev;
|
|
+ struct squashfs_symlink_inode_header_1 symlink;
|
|
+ struct squashfs_reg_inode_header_1 reg;
|
|
+ struct squashfs_dir_inode_header_1 dir;
|
|
+ struct squashfs_ipc_inode_header_1 ipc;
|
|
+};
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n) \
|
|
+ SQUASHFS_MEMSET(s, d, n);\
|
|
+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
|
|
+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
|
|
+ SQUASHFS_SWAP((s)->uid, d, 16, 4);\
|
|
+ SQUASHFS_SWAP((s)->guid, d, 20, 4);
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n)\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
|
|
+ sizeof(struct squashfs_ipc_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->type, d, 24, 4);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 28, 4);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
|
|
+ sizeof(struct squashfs_dev_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
|
|
+ sizeof(struct squashfs_symlink_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
|
|
+ sizeof(struct squashfs_reg_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 24, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 56, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 88, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
|
|
+ sizeof(struct squashfs_dir_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 24, 19);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 43, 13);\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 56, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 88, 24);\
|
|
+}
|
|
+
|
|
+#endif
|
|
+
|
|
+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
|
|
+
|
|
+struct squashfs_dir_index_2 {
|
|
+ unsigned int index:27;
|
|
+ unsigned int start_block:29;
|
|
+ unsigned char size;
|
|
+ unsigned char name[0];
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_base_inode_header_2 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_ipc_inode_header_2 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_dev_inode_header_2 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned short rdev;
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_symlink_inode_header_2 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned short symlink_size;
|
|
+ char symlink[0];
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_reg_inode_header_2 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned int mtime;
|
|
+ unsigned int start_block;
|
|
+ unsigned int fragment;
|
|
+ unsigned int offset;
|
|
+ unsigned int file_size:32;
|
|
+ unsigned short block_list[0];
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_dir_inode_header_2 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned int file_size:19;
|
|
+ unsigned int offset:13;
|
|
+ unsigned int mtime;
|
|
+ unsigned int start_block:24;
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_ldir_inode_header_2 {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned int file_size:27;
|
|
+ unsigned int offset:13;
|
|
+ unsigned int mtime;
|
|
+ unsigned int start_block:24;
|
|
+ unsigned int i_count:16;
|
|
+ struct squashfs_dir_index_2 index[0];
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+union squashfs_inode_header_2 {
|
|
+ struct squashfs_base_inode_header_2 base;
|
|
+ struct squashfs_dev_inode_header_2 dev;
|
|
+ struct squashfs_symlink_inode_header_2 symlink;
|
|
+ struct squashfs_reg_inode_header_2 reg;
|
|
+ struct squashfs_dir_inode_header_2 dir;
|
|
+ struct squashfs_ldir_inode_header_2 ldir;
|
|
+ struct squashfs_ipc_inode_header_2 ipc;
|
|
+};
|
|
+
|
|
+struct squashfs_dir_header_2 {
|
|
+ unsigned int count:8;
|
|
+ unsigned int start_block:24;
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_dir_entry_2 {
|
|
+ unsigned int offset:13;
|
|
+ unsigned int type:3;
|
|
+ unsigned int size:8;
|
|
+ char name[0];
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+struct squashfs_fragment_entry_2 {
|
|
+ unsigned int start_block;
|
|
+ unsigned int size;
|
|
+} __attribute__ ((packed));
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
|
|
+ SQUASHFS_MEMSET(s, d, n);\
|
|
+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
|
|
+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
|
|
+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
|
|
+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, n) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_IPC_INODE_HEADER_2(s, d) \
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, sizeof(struct squashfs_ipc_inode_header_2))
|
|
+
|
|
+#define SQUASHFS_SWAP_DEV_INODE_HEADER_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
|
|
+ sizeof(struct squashfs_dev_inode_header_2)); \
|
|
+ SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
|
|
+ sizeof(struct squashfs_symlink_inode_header_2));\
|
|
+ SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_REG_INODE_HEADER_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
|
|
+ sizeof(struct squashfs_reg_inode_header_2));\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 64, 32);\
|
|
+ SQUASHFS_SWAP((s)->fragment, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 128, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 160, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_INODE_HEADER_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
|
|
+ sizeof(struct squashfs_dir_inode_header_2));\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 32, 19);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 51, 13);\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 64, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 96, 24);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_LDIR_INODE_HEADER_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
|
|
+ sizeof(struct squashfs_ldir_inode_header_2));\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 32, 27);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 59, 13);\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 72, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 104, 24);\
|
|
+ SQUASHFS_SWAP((s)->i_count, d, 128, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_INDEX_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_2));\
|
|
+ SQUASHFS_SWAP((s)->index, d, 0, 27);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 27, 29);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 56, 8);\
|
|
+}
|
|
+#define SQUASHFS_SWAP_DIR_HEADER_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_2));\
|
|
+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_ENTRY_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_2));\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
|
|
+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_FRAGMENT_ENTRY_2(s, d) {\
|
|
+ SQUASHFS_SWAP_START\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_2));\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 32, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_FRAGMENT_INDEXES_2(s, d, n) SQUASHFS_SWAP_INTS(s, d, n)
|
|
+
|
|
+/* fragment and fragment table defines */
|
|
+#define SQUASHFS_FRAGMENT_BYTES_2(A) (A * sizeof(struct squashfs_fragment_entry_2))
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEX_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEX_OFFSET_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) % \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEXES_2(A) ((SQUASHFS_FRAGMENT_BYTES_2(A) + \
|
|
+ SQUASHFS_METADATA_SIZE - 1) / \
|
|
+ SQUASHFS_METADATA_SIZE)
|
|
+
|
|
+#define SQUASHFS_FRAGMENT_INDEX_BYTES_2(A) (SQUASHFS_FRAGMENT_INDEXES_2(A) *\
|
|
+ sizeof(int))
|
|
+
|
|
+#endif
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+
|
|
+/*
|
|
+ * macros used to swap each structure entry, taking into account
|
|
+ * bitfields and different bitfield placing conventions on differing
|
|
+ * architectures
|
|
+ */
|
|
+
|
|
+#include <asm/byteorder.h>
|
|
+
|
|
+#ifdef __BIG_ENDIAN
|
|
+ /* convert from little endian to big endian */
|
|
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
|
|
+ tbits, b_pos)
|
|
+#else
|
|
+ /* convert from big endian to little endian */
|
|
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
|
|
+ tbits, 64 - tbits - b_pos)
|
|
+#endif
|
|
+
|
|
+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
|
|
+ b_pos = pos % 8;\
|
|
+ val = 0;\
|
|
+ s = (unsigned char *)p + (pos / 8);\
|
|
+ d = ((unsigned char *) &val) + 7;\
|
|
+ for(bits = 0; bits < (tbits + b_pos); bits += 8) \
|
|
+ *d-- = *s++;\
|
|
+ value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
|
|
+
|
|
+#endif
|
|
+#endif
|
|
diff -uNr a/include/linux/squashfs_fs_i.h b/include/linux/squashfs_fs_i.h
|
|
--- a/include/linux/squashfs_fs_i.h 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/include/linux/squashfs_fs_i.h 2008-08-13 16:16:05.000000000 -0700
|
|
@@ -0,0 +1,45 @@
|
|
+#ifndef SQUASHFS_FS_I
|
|
+#define SQUASHFS_FS_I
|
|
+/*
|
|
+ * Squashfs
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this program; if not, write to the Free Software
|
|
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * squashfs_fs_i.h
|
|
+ */
|
|
+
|
|
+struct squashfs_inode_info {
|
|
+ long long start_block;
|
|
+ unsigned int offset;
|
|
+ union {
|
|
+ struct {
|
|
+ long long fragment_start_block;
|
|
+ unsigned int fragment_size;
|
|
+ unsigned int fragment_offset;
|
|
+ long long block_list_start;
|
|
+ } s1;
|
|
+ struct {
|
|
+ long long directory_index_start;
|
|
+ unsigned int directory_index_offset;
|
|
+ unsigned int directory_index_count;
|
|
+ unsigned int parent_inode;
|
|
+ } s2;
|
|
+ } u;
|
|
+ struct inode vfs_inode;
|
|
+};
|
|
+#endif
|
|
diff -uNr a/include/linux/squashfs_fs_sb.h b/include/linux/squashfs_fs_sb.h
|
|
--- a/include/linux/squashfs_fs_sb.h 1969-12-31 16:00:00.000000000 -0800
|
|
+++ b/include/linux/squashfs_fs_sb.h 2008-08-13 16:16:05.000000000 -0700
|
|
@@ -0,0 +1,78 @@
|
|
+#ifndef SQUASHFS_FS_SB
|
|
+#define SQUASHFS_FS_SB
|
|
+/*
|
|
+ * Squashfs
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or
|
|
+ * modify it under the terms of the GNU General Public License
|
|
+ * as published by the Free Software Foundation; either version 2,
|
|
+ * or (at your option) any later version.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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+ *
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+ * squashfs_fs_sb.h
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+ */
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+
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+#include <linux/squashfs_fs.h>
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+
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+struct squashfs_cache_entry {
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+ long long block;
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+ int length;
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+ int locked;
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+ long long next_index;
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+ char pending;
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+ char error;
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+ int waiting;
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+ wait_queue_head_t wait_queue;
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+ char *data;
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+};
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+
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+struct squashfs_cache {
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+ char *name;
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+ int entries;
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+ int block_size;
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+ int next_blk;
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+ int waiting;
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+ int unused_blks;
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+ int use_vmalloc;
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+ spinlock_t lock;
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+ wait_queue_head_t wait_queue;
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+ struct squashfs_cache_entry entry[0];
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+};
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+
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+struct squashfs_sb_info {
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+ struct squashfs_super_block sblk;
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+ int devblksize;
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+ int devblksize_log2;
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+ int swap;
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+ struct squashfs_cache *block_cache;
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+ struct squashfs_cache *fragment_cache;
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+ int next_meta_index;
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+ unsigned int *id_table;
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+ long long *fragment_index;
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+ unsigned int *fragment_index_2;
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+ char *read_page;
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+ struct mutex read_data_mutex;
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+ struct mutex read_page_mutex;
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+ struct mutex meta_index_mutex;
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+ struct meta_index *meta_index;
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+ z_stream stream;
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+ long long *inode_lookup_table;
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+ int (*read_inode)(struct inode *i, squashfs_inode_t \
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+ inode);
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+ long long (*read_blocklist)(struct inode *inode, int \
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+ index, int readahead_blks, char *block_list, \
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+ unsigned short **block_p, unsigned int *bsize);
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+ int (*read_fragment_index_table)(struct super_block *s);
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+};
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+#endif
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