From: J. R. Okajima Date: Sat Nov 21 10:43:50 2015 +0900 Subject: aufs4.x-rcN base patch Origin: https://github.com/sfjro/aufs4-standalone/tree/980697121e7bb079411664d77caa8f1e489f344c Bug-Debian: https://bugs.debian.org/541828 Patch headers added by debian/patches/features/all/aufs4/gen-patch aufs4.x-rcN base patch diff --git a/MAINTAINERS b/MAINTAINERS index e9caa4b..ddb7b8a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2028,6 +2028,19 @@ F: include/linux/audit.h F: include/uapi/linux/audit.h F: kernel/audit* +AUFS (advanced multi layered unification filesystem) FILESYSTEM +M: "J. R. Okajima" +L: linux-unionfs@vger.kernel.org +L: aufs-users@lists.sourceforge.net (members only) +W: http://aufs.sourceforge.net +T: git://github.com/sfjro/aufs4-linux.git +S: Supported +F: Documentation/filesystems/aufs/ +F: Documentation/ABI/testing/debugfs-aufs +F: Documentation/ABI/testing/sysfs-aufs +F: fs/aufs/ +F: include/uapi/linux/aufs_type.h + AUXILIARY DISPLAY DRIVERS M: Miguel Ojeda Sandonis W: http://miguelojeda.es/auxdisplay.htm diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 423f4ca..abfdd2b 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -706,6 +706,24 @@ static inline int is_loop_device(struct file *file) return i && S_ISBLK(i->i_mode) && MAJOR(i->i_rdev) == LOOP_MAJOR; } +/* + * for AUFS + * no get/put for file. + */ +struct file *loop_backing_file(struct super_block *sb) +{ + struct file *ret; + struct loop_device *l; + + ret = NULL; + if (MAJOR(sb->s_dev) == LOOP_MAJOR) { + l = sb->s_bdev->bd_disk->private_data; + ret = l->lo_backing_file; + } + return ret; +} +EXPORT_SYMBOL_GPL(loop_backing_file); + /* loop sysfs attributes */ static ssize_t loop_attr_show(struct device *dev, char *page, diff --git a/fs/dcache.c b/fs/dcache.c index 5c33aeb..8aa7f26 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1167,7 +1167,7 @@ enum d_walk_ret { * * The @enter() and @finish() callbacks are called with d_lock held. */ -static void d_walk(struct dentry *parent, void *data, +void d_walk(struct dentry *parent, void *data, enum d_walk_ret (*enter)(void *, struct dentry *), void (*finish)(void *)) { diff --git a/fs/read_write.c b/fs/read_write.c index 819ef3f..fd0414e 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -494,6 +494,28 @@ ssize_t __vfs_write(struct file *file, const char __user *p, size_t count, } EXPORT_SYMBOL(__vfs_write); +vfs_readf_t vfs_readf(struct file *file) +{ + const struct file_operations *fop = file->f_op; + + if (fop->read) + return fop->read; + if (fop->read_iter) + return new_sync_read; + return ERR_PTR(-ENOSYS); +} + +vfs_writef_t vfs_writef(struct file *file) +{ + const struct file_operations *fop = file->f_op; + + if (fop->write) + return fop->write; + if (fop->write_iter) + return new_sync_write; + return ERR_PTR(-ENOSYS); +} + ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t *pos) { mm_segment_t old_fs; diff --git a/fs/splice.c b/fs/splice.c index 801c21c..218d188 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1102,8 +1102,8 @@ EXPORT_SYMBOL(generic_splice_sendpage); /* * Attempt to initiate a splice from pipe to file. */ -static long do_splice_from(struct pipe_inode_info *pipe, struct file *out, - loff_t *ppos, size_t len, unsigned int flags) +long do_splice_from(struct pipe_inode_info *pipe, struct file *out, + loff_t *ppos, size_t len, unsigned int flags) { ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int); @@ -1119,9 +1119,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out, /* * Attempt to initiate a splice from a file to a pipe. */ -static long do_splice_to(struct file *in, loff_t *ppos, - struct pipe_inode_info *pipe, size_t len, - unsigned int flags) +long do_splice_to(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, size_t len, + unsigned int flags) { ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int); diff --git a/include/linux/file.h b/include/linux/file.h index f87d308..9a290b3 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -19,6 +19,7 @@ struct dentry; struct path; extern struct file *alloc_file(struct path *, fmode_t mode, const struct file_operations *fop); +extern struct file *get_empty_filp(void); static inline void fput_light(struct file *file, int fput_needed) { diff --git a/include/linux/fs.h b/include/linux/fs.h index 3aa5142..8d48506 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1672,6 +1672,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, struct iovec *fast_pointer, struct iovec **ret_pointer); +typedef ssize_t (*vfs_readf_t)(struct file *, char __user *, size_t, loff_t *); +typedef ssize_t (*vfs_writef_t)(struct file *, const char __user *, size_t, + loff_t *); +vfs_readf_t vfs_readf(struct file *file); +vfs_writef_t vfs_writef(struct file *file); + extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *); extern ssize_t __vfs_write(struct file *, const char __user *, size_t, loff_t *); extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *); diff --git a/include/linux/splice.h b/include/linux/splice.h index da2751d..2e0fca6 100644 --- a/include/linux/splice.h +++ b/include/linux/splice.h @@ -83,4 +83,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *); extern void spd_release_page(struct splice_pipe_desc *, unsigned int); extern const struct pipe_buf_operations page_cache_pipe_buf_ops; + +extern long do_splice_from(struct pipe_inode_info *pipe, struct file *out, + loff_t *ppos, size_t len, unsigned int flags); +extern long do_splice_to(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, size_t len, + unsigned int flags); #endif