You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
795 lines
21 KiB
795 lines
21 KiB
/* |
|
* nilfs2_fs.h - NILFS2 on-disk structures and common declarations. |
|
* |
|
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. |
|
* |
|
* 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 of the License, 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, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
|
* |
|
* Written by Koji Sato <koji@osrg.net> |
|
* Ryusuke Konishi <ryusuke@osrg.net> |
|
*/ |
|
/* |
|
* linux/include/linux/ext2_fs.h |
|
* |
|
* Copyright (C) 1992, 1993, 1994, 1995 |
|
* Remy Card (card@masi.ibp.fr) |
|
* Laboratoire MASI - Institut Blaise Pascal |
|
* Universite Pierre et Marie Curie (Paris VI) |
|
* |
|
* from |
|
* |
|
* linux/include/linux/minix_fs.h |
|
* |
|
* Copyright (C) 1991, 1992 Linus Torvalds |
|
*/ |
|
|
|
#ifndef _LINUX_NILFS_FS_H |
|
#define _LINUX_NILFS_FS_H |
|
|
|
#include <linux/types.h> |
|
#include <linux/ioctl.h> |
|
|
|
/* |
|
* Inode flags stored in nilfs_inode and on-memory nilfs inode |
|
* |
|
* We define these flags based on ext2-fs because of the |
|
* compatibility reason; to avoid problems in chattr(1) |
|
*/ |
|
#define NILFS_SECRM_FL 0x00000001 /* Secure deletion */ |
|
#define NILFS_UNRM_FL 0x00000002 /* Undelete */ |
|
#define NILFS_SYNC_FL 0x00000008 /* Synchronous updates */ |
|
#define NILFS_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
|
#define NILFS_APPEND_FL 0x00000020 /* writes to file may only append */ |
|
#define NILFS_NODUMP_FL 0x00000040 /* do not dump file */ |
|
#define NILFS_NOATIME_FL 0x00000080 /* do not update atime */ |
|
/* Reserved for compression usage... */ |
|
#define NILFS_NOTAIL_FL 0x00008000 /* file tail should not be merged */ |
|
#define NILFS_DIRSYNC_FL 0x00010000 /* dirsync behaviour */ |
|
|
|
#define NILFS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ |
|
#define NILFS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ |
|
|
|
|
|
#define NILFS_INODE_BMAP_SIZE 7 |
|
/** |
|
* struct nilfs_inode - structure of an inode on disk |
|
* @i_blocks: blocks count |
|
* @i_size: size in bytes |
|
* @i_ctime: creation time |
|
* @i_mtime: modification time |
|
* @i_dtime: deletion time |
|
* @i_uid: user id |
|
* @i_gid: group id |
|
* @i_mode: file mode |
|
* @i_links_count: links count |
|
* @i_flags: file flags |
|
* @i_bmap: block mapping |
|
* @i_xattr: extended attributes |
|
* @i_generation: file generation (for NFS) |
|
* @i_pad: padding |
|
*/ |
|
struct nilfs_inode { |
|
__le64 i_blocks; |
|
__le64 i_size; |
|
__le64 i_ctime; |
|
__le64 i_mtime; |
|
__le64 i_dtime; |
|
__le32 i_uid; |
|
__le32 i_gid; |
|
__le16 i_mode; |
|
__le16 i_links_count; |
|
__le32 i_flags; |
|
__le64 i_bmap[NILFS_INODE_BMAP_SIZE]; |
|
#define i_device_code i_bmap[0] |
|
__le64 i_xattr; |
|
__le32 i_generation; |
|
__le32 i_pad; |
|
}; |
|
|
|
/** |
|
* struct nilfs_super_root - structure of super root |
|
* @sr_sum: check sum |
|
* @sr_bytes: byte count of the structure |
|
* @sr_flags: flags (reserved) |
|
* @sr_nongc_ctime: write time of the last segment not for cleaner operation |
|
* @sr_dat: DAT file inode |
|
* @sr_cpfile: checkpoint file inode |
|
* @sr_sufile: segment usage file inode |
|
*/ |
|
struct nilfs_super_root { |
|
__le32 sr_sum; |
|
__le16 sr_bytes; |
|
__le16 sr_flags; |
|
__le64 sr_nongc_ctime; |
|
struct nilfs_inode sr_dat; |
|
struct nilfs_inode sr_cpfile; |
|
struct nilfs_inode sr_sufile; |
|
}; |
|
|
|
#define NILFS_SR_MDT_OFFSET(inode_size, i) \ |
|
((unsigned long)&((struct nilfs_super_root *)0)->sr_dat + \ |
|
(inode_size) * (i)) |
|
#define NILFS_SR_DAT_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 0) |
|
#define NILFS_SR_CPFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 1) |
|
#define NILFS_SR_SUFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 2) |
|
#define NILFS_SR_BYTES (sizeof(struct nilfs_super_root)) |
|
|
|
/* |
|
* Maximal mount counts |
|
*/ |
|
#define NILFS_DFL_MAX_MNT_COUNT 50 /* 50 mounts */ |
|
|
|
/* |
|
* File system states (sbp->s_state, nilfs->ns_mount_state) |
|
*/ |
|
#define NILFS_VALID_FS 0x0001 /* Unmounted cleanly */ |
|
#define NILFS_ERROR_FS 0x0002 /* Errors detected */ |
|
#define NILFS_RESIZE_FS 0x0004 /* Resize required */ |
|
|
|
/* |
|
* Mount flags (sbi->s_mount_opt) |
|
*/ |
|
#define NILFS_MOUNT_ERROR_MODE 0x0070 /* Error mode mask */ |
|
#define NILFS_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ |
|
#define NILFS_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ |
|
#define NILFS_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ |
|
#define NILFS_MOUNT_SNAPSHOT 0x0080 /* Snapshot flag */ |
|
#define NILFS_MOUNT_BARRIER 0x1000 /* Use block barriers */ |
|
#define NILFS_MOUNT_STRICT_ORDER 0x2000 /* Apply strict in-order |
|
semantics also for data */ |
|
|
|
|
|
/** |
|
* struct nilfs_super_block - structure of super block on disk |
|
*/ |
|
struct nilfs_super_block { |
|
__le32 s_rev_level; /* Revision level */ |
|
__le16 s_minor_rev_level; /* minor revision level */ |
|
__le16 s_magic; /* Magic signature */ |
|
|
|
__le16 s_bytes; /* Bytes count of CRC calculation |
|
for this structure. s_reserved |
|
is excluded. */ |
|
__le16 s_flags; /* flags */ |
|
__le32 s_crc_seed; /* Seed value of CRC calculation */ |
|
__le32 s_sum; /* Check sum of super block */ |
|
|
|
__le32 s_log_block_size; /* Block size represented as follows |
|
blocksize = |
|
1 << (s_log_block_size + 10) */ |
|
__le64 s_nsegments; /* Number of segments in filesystem */ |
|
__le64 s_dev_size; /* block device size in bytes */ |
|
__le64 s_first_data_block; /* 1st seg disk block number */ |
|
__le32 s_blocks_per_segment; /* number of blocks per full segment */ |
|
__le32 s_r_segments_percentage; /* Reserved segments percentage */ |
|
|
|
__le64 s_last_cno; /* Last checkpoint number */ |
|
__le64 s_last_pseg; /* disk block addr pseg written last */ |
|
__le64 s_last_seq; /* seq. number of seg written last */ |
|
__le64 s_free_blocks_count; /* Free blocks count */ |
|
|
|
__le64 s_ctime; /* Creation time (execution time of |
|
newfs) */ |
|
__le64 s_mtime; /* Mount time */ |
|
__le64 s_wtime; /* Write time */ |
|
__le16 s_mnt_count; /* Mount count */ |
|
__le16 s_max_mnt_count; /* Maximal mount count */ |
|
__le16 s_state; /* File system state */ |
|
__le16 s_errors; /* Behaviour when detecting errors */ |
|
__le64 s_lastcheck; /* time of last check */ |
|
|
|
__le32 s_checkinterval; /* max. time between checks */ |
|
__le32 s_creator_os; /* OS */ |
|
__le16 s_def_resuid; /* Default uid for reserved blocks */ |
|
__le16 s_def_resgid; /* Default gid for reserved blocks */ |
|
__le32 s_first_ino; /* First non-reserved inode */ |
|
|
|
__le16 s_inode_size; /* Size of an inode */ |
|
__le16 s_dat_entry_size; /* Size of a dat entry */ |
|
__le16 s_checkpoint_size; /* Size of a checkpoint */ |
|
__le16 s_segment_usage_size; /* Size of a segment usage */ |
|
|
|
__u8 s_uuid[16]; /* 128-bit uuid for volume */ |
|
char s_volume_name[16]; /* volume name */ |
|
char s_last_mounted[64]; /* directory where last mounted */ |
|
|
|
__le32 s_c_interval; /* Commit interval of segment */ |
|
__le32 s_c_block_max; /* Threshold of data amount for |
|
the segment construction */ |
|
__u32 s_reserved[192]; /* padding to the end of the block */ |
|
}; |
|
|
|
/* |
|
* Codes for operating systems |
|
*/ |
|
#define NILFS_OS_LINUX 0 |
|
/* Codes from 1 to 4 are reserved to keep compatibility with ext2 creator-OS */ |
|
|
|
/* |
|
* Revision levels |
|
*/ |
|
#define NILFS_CURRENT_REV 2 /* current major revision */ |
|
#define NILFS_MINOR_REV 0 /* minor revision */ |
|
|
|
/* |
|
* Bytes count of super_block for CRC-calculation |
|
*/ |
|
#define NILFS_SB_BYTES \ |
|
((long)&((struct nilfs_super_block *)0)->s_reserved) |
|
|
|
/* |
|
* Special inode number |
|
*/ |
|
#define NILFS_ROOT_INO 2 /* Root file inode */ |
|
#define NILFS_DAT_INO 3 /* DAT file */ |
|
#define NILFS_CPFILE_INO 4 /* checkpoint file */ |
|
#define NILFS_SUFILE_INO 5 /* segment usage file */ |
|
#define NILFS_IFILE_INO 6 /* ifile */ |
|
#define NILFS_ATIME_INO 7 /* Atime file (reserved) */ |
|
#define NILFS_XATTR_INO 8 /* Xattribute file (reserved) */ |
|
#define NILFS_SKETCH_INO 10 /* Sketch file */ |
|
#define NILFS_USER_INO 11 /* Fisrt user's file inode number */ |
|
|
|
#define NILFS_SB_OFFSET_BYTES 1024 /* byte offset of nilfs superblock */ |
|
#define NILFS_SUPER_MAGIC 0x3434 /* NILFS filesystem magic number */ |
|
|
|
#define NILFS_SEG_MIN_BLOCKS 16 /* Minimum number of blocks in |
|
a full segment */ |
|
#define NILFS_PSEG_MIN_BLOCKS 2 /* Minimum number of blocks in |
|
a partial segment */ |
|
#define NILFS_MIN_NRSVSEGS 8 /* Minimum number of reserved |
|
segments */ |
|
|
|
|
|
/* |
|
* Maximal count of links to a file |
|
*/ |
|
#define NILFS_LINK_MAX 32000 |
|
|
|
/* |
|
* Structure of a directory entry |
|
* (Same as ext2) |
|
*/ |
|
|
|
#define NILFS_NAME_LEN 255 |
|
|
|
/* |
|
* The new version of the directory entry. Since V0 structures are |
|
* stored in intel byte order, and the name_len field could never be |
|
* bigger than 255 chars, it's safe to reclaim the extra byte for the |
|
* file_type field. |
|
*/ |
|
struct nilfs_dir_entry { |
|
__le64 inode; /* Inode number */ |
|
__le16 rec_len; /* Directory entry length */ |
|
__u8 name_len; /* Name length */ |
|
__u8 file_type; |
|
char name[NILFS_NAME_LEN]; /* File name */ |
|
char pad; |
|
}; |
|
|
|
/* |
|
* NILFS directory file types. Only the low 3 bits are used. The |
|
* other bits are reserved for now. |
|
*/ |
|
enum { |
|
NILFS_FT_UNKNOWN, |
|
NILFS_FT_REG_FILE, |
|
NILFS_FT_DIR, |
|
NILFS_FT_CHRDEV, |
|
NILFS_FT_BLKDEV, |
|
NILFS_FT_FIFO, |
|
NILFS_FT_SOCK, |
|
NILFS_FT_SYMLINK, |
|
NILFS_FT_MAX |
|
}; |
|
|
|
/* |
|
* NILFS_DIR_PAD defines the directory entries boundaries |
|
* |
|
* NOTE: It must be a multiple of 8 |
|
*/ |
|
#define NILFS_DIR_PAD 8 |
|
#define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1) |
|
#define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & \ |
|
~NILFS_DIR_ROUND) |
|
|
|
|
|
/** |
|
* struct nilfs_finfo - file information |
|
* @fi_ino: inode number |
|
* @fi_cno: checkpoint number |
|
* @fi_nblocks: number of blocks (including intermediate blocks) |
|
* @fi_ndatablk: number of file data blocks |
|
*/ |
|
struct nilfs_finfo { |
|
__le64 fi_ino; |
|
__le64 fi_cno; |
|
__le32 fi_nblocks; |
|
__le32 fi_ndatablk; |
|
/* array of virtual block numbers */ |
|
}; |
|
|
|
/** |
|
* struct nilfs_binfo_v - information for the block to which a virtual block number is assigned |
|
* @bi_vblocknr: virtual block number |
|
* @bi_blkoff: block offset |
|
*/ |
|
struct nilfs_binfo_v { |
|
__le64 bi_vblocknr; |
|
__le64 bi_blkoff; |
|
}; |
|
|
|
/** |
|
* struct nilfs_binfo_dat - information for the block which belongs to the DAT file |
|
* @bi_blkoff: block offset |
|
* @bi_level: level |
|
* @bi_pad: padding |
|
*/ |
|
struct nilfs_binfo_dat { |
|
__le64 bi_blkoff; |
|
__u8 bi_level; |
|
__u8 bi_pad[7]; |
|
}; |
|
|
|
/** |
|
* union nilfs_binfo: block information |
|
* @bi_v: nilfs_binfo_v structure |
|
* @bi_dat: nilfs_binfo_dat structure |
|
*/ |
|
union nilfs_binfo { |
|
struct nilfs_binfo_v bi_v; |
|
struct nilfs_binfo_dat bi_dat; |
|
}; |
|
|
|
/** |
|
* struct nilfs_segment_summary - segment summary |
|
* @ss_datasum: checksum of data |
|
* @ss_sumsum: checksum of segment summary |
|
* @ss_magic: magic number |
|
* @ss_bytes: size of this structure in bytes |
|
* @ss_flags: flags |
|
* @ss_seq: sequence number |
|
* @ss_create: creation timestamp |
|
* @ss_next: next segment |
|
* @ss_nblocks: number of blocks |
|
* @ss_nfinfo: number of finfo structures |
|
* @ss_sumbytes: total size of segment summary in bytes |
|
* @ss_pad: padding |
|
*/ |
|
struct nilfs_segment_summary { |
|
__le32 ss_datasum; |
|
__le32 ss_sumsum; |
|
__le32 ss_magic; |
|
__le16 ss_bytes; |
|
__le16 ss_flags; |
|
__le64 ss_seq; |
|
__le64 ss_create; |
|
__le64 ss_next; |
|
__le32 ss_nblocks; |
|
__le32 ss_nfinfo; |
|
__le32 ss_sumbytes; |
|
__le32 ss_pad; |
|
/* array of finfo structures */ |
|
}; |
|
|
|
#define NILFS_SEGSUM_MAGIC 0x1eaffa11 /* segment summary magic number */ |
|
|
|
/* |
|
* Segment summary flags |
|
*/ |
|
#define NILFS_SS_LOGBGN 0x0001 /* begins a logical segment */ |
|
#define NILFS_SS_LOGEND 0x0002 /* ends a logical segment */ |
|
#define NILFS_SS_SR 0x0004 /* has super root */ |
|
#define NILFS_SS_SYNDT 0x0008 /* includes data only updates */ |
|
#define NILFS_SS_GC 0x0010 /* segment written for cleaner operation */ |
|
|
|
/** |
|
* struct nilfs_palloc_group_desc - block group descriptor |
|
* @pg_nfrees: number of free entries in block group |
|
*/ |
|
struct nilfs_palloc_group_desc { |
|
__le32 pg_nfrees; |
|
}; |
|
|
|
/** |
|
* struct nilfs_dat_entry - disk address translation entry |
|
* @dt_blocknr: block number |
|
* @dt_start: start checkpoint number |
|
* @dt_end: end checkpoint number |
|
* @dt_rsv: reserved for future use |
|
*/ |
|
struct nilfs_dat_entry { |
|
__le64 de_blocknr; |
|
__le64 de_start; |
|
__le64 de_end; |
|
__le64 de_rsv; |
|
}; |
|
|
|
/** |
|
* struct nilfs_dat_group_desc - block group descriptor |
|
* @dg_nfrees: number of free virtual block numbers in block group |
|
*/ |
|
struct nilfs_dat_group_desc { |
|
__le32 dg_nfrees; |
|
}; |
|
|
|
|
|
/** |
|
* struct nilfs_snapshot_list - snapshot list |
|
* @ssl_next: next checkpoint number on snapshot list |
|
* @ssl_prev: previous checkpoint number on snapshot list |
|
*/ |
|
struct nilfs_snapshot_list { |
|
__le64 ssl_next; |
|
__le64 ssl_prev; |
|
}; |
|
|
|
/** |
|
* struct nilfs_checkpoint - checkpoint structure |
|
* @cp_flags: flags |
|
* @cp_checkpoints_count: checkpoints count in a block |
|
* @cp_snapshot_list: snapshot list |
|
* @cp_cno: checkpoint number |
|
* @cp_create: creation timestamp |
|
* @cp_nblk_inc: number of blocks incremented by this checkpoint |
|
* @cp_inodes_count: inodes count |
|
* @cp_blocks_count: blocks count |
|
* @cp_ifile_inode: inode of ifile |
|
*/ |
|
struct nilfs_checkpoint { |
|
__le32 cp_flags; |
|
__le32 cp_checkpoints_count; |
|
struct nilfs_snapshot_list cp_snapshot_list; |
|
__le64 cp_cno; |
|
__le64 cp_create; |
|
__le64 cp_nblk_inc; |
|
__le64 cp_inodes_count; |
|
__le64 cp_blocks_count; /* Reserved (might be deleted) */ |
|
|
|
/* Do not change the byte offset of ifile inode. |
|
To keep the compatibility of the disk format, |
|
additional fields should be added behind cp_ifile_inode. */ |
|
struct nilfs_inode cp_ifile_inode; |
|
}; |
|
|
|
/* checkpoint flags */ |
|
enum { |
|
NILFS_CHECKPOINT_SNAPSHOT, |
|
NILFS_CHECKPOINT_INVALID, |
|
NILFS_CHECKPOINT_SKETCH, |
|
NILFS_CHECKPOINT_MINOR, |
|
}; |
|
|
|
#define NILFS_CHECKPOINT_FNS(flag, name) \ |
|
static inline void \ |
|
nilfs_checkpoint_set_##name(struct nilfs_checkpoint *cp) \ |
|
{ \ |
|
cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) | \ |
|
(1UL << NILFS_CHECKPOINT_##flag)); \ |
|
} \ |
|
static inline void \ |
|
nilfs_checkpoint_clear_##name(struct nilfs_checkpoint *cp) \ |
|
{ \ |
|
cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) & \ |
|
~(1UL << NILFS_CHECKPOINT_##flag)); \ |
|
} \ |
|
static inline int \ |
|
nilfs_checkpoint_##name(const struct nilfs_checkpoint *cp) \ |
|
{ \ |
|
return !!(le32_to_cpu(cp->cp_flags) & \ |
|
(1UL << NILFS_CHECKPOINT_##flag)); \ |
|
} |
|
|
|
NILFS_CHECKPOINT_FNS(SNAPSHOT, snapshot) |
|
NILFS_CHECKPOINT_FNS(INVALID, invalid) |
|
NILFS_CHECKPOINT_FNS(MINOR, minor) |
|
|
|
/** |
|
* struct nilfs_cpinfo - checkpoint information |
|
* @ci_flags: flags |
|
* @ci_pad: padding |
|
* @ci_cno: checkpoint number |
|
* @ci_create: creation timestamp |
|
* @ci_nblk_inc: number of blocks incremented by this checkpoint |
|
* @ci_inodes_count: inodes count |
|
* @ci_blocks_count: blocks count |
|
* @ci_next: next checkpoint number in snapshot list |
|
*/ |
|
struct nilfs_cpinfo { |
|
__u32 ci_flags; |
|
__u32 ci_pad; |
|
__u64 ci_cno; |
|
__u64 ci_create; |
|
__u64 ci_nblk_inc; |
|
__u64 ci_inodes_count; |
|
__u64 ci_blocks_count; |
|
__u64 ci_next; |
|
}; |
|
|
|
#define NILFS_CPINFO_FNS(flag, name) \ |
|
static inline int \ |
|
nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \ |
|
{ \ |
|
return !!(cpinfo->ci_flags & (1UL << NILFS_CHECKPOINT_##flag)); \ |
|
} |
|
|
|
NILFS_CPINFO_FNS(SNAPSHOT, snapshot) |
|
NILFS_CPINFO_FNS(INVALID, invalid) |
|
NILFS_CPINFO_FNS(MINOR, minor) |
|
|
|
|
|
/** |
|
* struct nilfs_cpfile_header - checkpoint file header |
|
* @ch_ncheckpoints: number of checkpoints |
|
* @ch_nsnapshots: number of snapshots |
|
* @ch_snapshot_list: snapshot list |
|
*/ |
|
struct nilfs_cpfile_header { |
|
__le64 ch_ncheckpoints; |
|
__le64 ch_nsnapshots; |
|
struct nilfs_snapshot_list ch_snapshot_list; |
|
}; |
|
|
|
#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \ |
|
((sizeof(struct nilfs_cpfile_header) + \ |
|
sizeof(struct nilfs_checkpoint) - 1) / \ |
|
sizeof(struct nilfs_checkpoint)) |
|
|
|
/** |
|
* struct nilfs_segment_usage - segment usage |
|
* @su_lastmod: last modified timestamp |
|
* @su_nblocks: number of blocks in segment |
|
* @su_flags: flags |
|
*/ |
|
struct nilfs_segment_usage { |
|
__le64 su_lastmod; |
|
__le32 su_nblocks; |
|
__le32 su_flags; |
|
}; |
|
|
|
/* segment usage flag */ |
|
enum { |
|
NILFS_SEGMENT_USAGE_ACTIVE, |
|
NILFS_SEGMENT_USAGE_DIRTY, |
|
NILFS_SEGMENT_USAGE_ERROR, |
|
|
|
/* ... */ |
|
}; |
|
|
|
#define NILFS_SEGMENT_USAGE_FNS(flag, name) \ |
|
static inline void \ |
|
nilfs_segment_usage_set_##name(struct nilfs_segment_usage *su) \ |
|
{ \ |
|
su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) | \ |
|
(1UL << NILFS_SEGMENT_USAGE_##flag));\ |
|
} \ |
|
static inline void \ |
|
nilfs_segment_usage_clear_##name(struct nilfs_segment_usage *su) \ |
|
{ \ |
|
su->su_flags = \ |
|
cpu_to_le32(le32_to_cpu(su->su_flags) & \ |
|
~(1UL << NILFS_SEGMENT_USAGE_##flag)); \ |
|
} \ |
|
static inline int \ |
|
nilfs_segment_usage_##name(const struct nilfs_segment_usage *su) \ |
|
{ \ |
|
return !!(le32_to_cpu(su->su_flags) & \ |
|
(1UL << NILFS_SEGMENT_USAGE_##flag)); \ |
|
} |
|
|
|
NILFS_SEGMENT_USAGE_FNS(ACTIVE, active) |
|
NILFS_SEGMENT_USAGE_FNS(DIRTY, dirty) |
|
NILFS_SEGMENT_USAGE_FNS(ERROR, error) |
|
|
|
static inline void |
|
nilfs_segment_usage_set_clean(struct nilfs_segment_usage *su) |
|
{ |
|
su->su_lastmod = cpu_to_le64(0); |
|
su->su_nblocks = cpu_to_le32(0); |
|
su->su_flags = cpu_to_le32(0); |
|
} |
|
|
|
static inline int |
|
nilfs_segment_usage_clean(const struct nilfs_segment_usage *su) |
|
{ |
|
return !le32_to_cpu(su->su_flags); |
|
} |
|
|
|
/** |
|
* struct nilfs_sufile_header - segment usage file header |
|
* @sh_ncleansegs: number of clean segments |
|
* @sh_ndirtysegs: number of dirty segments |
|
* @sh_last_alloc: last allocated segment number |
|
*/ |
|
struct nilfs_sufile_header { |
|
__le64 sh_ncleansegs; |
|
__le64 sh_ndirtysegs; |
|
__le64 sh_last_alloc; |
|
/* ... */ |
|
}; |
|
|
|
#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \ |
|
((sizeof(struct nilfs_sufile_header) + \ |
|
sizeof(struct nilfs_segment_usage) - 1) / \ |
|
sizeof(struct nilfs_segment_usage)) |
|
|
|
/** |
|
* nilfs_suinfo - segment usage information |
|
* @sui_lastmod: |
|
* @sui_nblocks: |
|
* @sui_flags: |
|
*/ |
|
struct nilfs_suinfo { |
|
__u64 sui_lastmod; |
|
__u32 sui_nblocks; |
|
__u32 sui_flags; |
|
}; |
|
|
|
#define NILFS_SUINFO_FNS(flag, name) \ |
|
static inline int \ |
|
nilfs_suinfo_##name(const struct nilfs_suinfo *si) \ |
|
{ \ |
|
return si->sui_flags & (1UL << NILFS_SEGMENT_USAGE_##flag); \ |
|
} |
|
|
|
NILFS_SUINFO_FNS(ACTIVE, active) |
|
NILFS_SUINFO_FNS(DIRTY, dirty) |
|
NILFS_SUINFO_FNS(ERROR, error) |
|
|
|
static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si) |
|
{ |
|
return !si->sui_flags; |
|
} |
|
|
|
/* ioctl */ |
|
enum { |
|
NILFS_CHECKPOINT, |
|
NILFS_SNAPSHOT, |
|
}; |
|
|
|
/** |
|
* struct nilfs_cpmode - |
|
* @cc_cno: |
|
* @cc_mode: |
|
*/ |
|
struct nilfs_cpmode { |
|
__u64 cm_cno; |
|
__u32 cm_mode; |
|
__u32 cm_pad; |
|
}; |
|
|
|
/** |
|
* struct nilfs_argv - argument vector |
|
* @v_base: |
|
* @v_nmembs: |
|
* @v_size: |
|
* @v_flags: |
|
* @v_index: |
|
*/ |
|
struct nilfs_argv { |
|
__u64 v_base; |
|
__u32 v_nmembs; /* number of members */ |
|
__u16 v_size; /* size of members */ |
|
__u16 v_flags; |
|
__u64 v_index; |
|
}; |
|
|
|
/** |
|
* struct nilfs_period - |
|
* @p_start: |
|
* @p_end: |
|
*/ |
|
struct nilfs_period { |
|
__u64 p_start; |
|
__u64 p_end; |
|
}; |
|
|
|
/** |
|
* struct nilfs_cpstat - |
|
* @cs_cno: checkpoint number |
|
* @cs_ncps: number of checkpoints |
|
* @cs_nsss: number of snapshots |
|
*/ |
|
struct nilfs_cpstat { |
|
__u64 cs_cno; |
|
__u64 cs_ncps; |
|
__u64 cs_nsss; |
|
}; |
|
|
|
/** |
|
* struct nilfs_sustat - |
|
* @ss_nsegs: number of segments |
|
* @ss_ncleansegs: number of clean segments |
|
* @ss_ndirtysegs: number of dirty segments |
|
* @ss_ctime: creation time of the last segment |
|
* @ss_nongc_ctime: creation time of the last segment not for GC |
|
* @ss_prot_seq: least sequence number of segments which must not be reclaimed |
|
*/ |
|
struct nilfs_sustat { |
|
__u64 ss_nsegs; |
|
__u64 ss_ncleansegs; |
|
__u64 ss_ndirtysegs; |
|
__u64 ss_ctime; |
|
__u64 ss_nongc_ctime; |
|
__u64 ss_prot_seq; |
|
}; |
|
|
|
/** |
|
* struct nilfs_vinfo - virtual block number information |
|
* @vi_vblocknr: |
|
* @vi_start: |
|
* @vi_end: |
|
* @vi_blocknr: |
|
*/ |
|
struct nilfs_vinfo { |
|
__u64 vi_vblocknr; |
|
__u64 vi_start; |
|
__u64 vi_end; |
|
__u64 vi_blocknr; |
|
}; |
|
|
|
/** |
|
* struct nilfs_vdesc - |
|
*/ |
|
struct nilfs_vdesc { |
|
__u64 vd_ino; |
|
__u64 vd_cno; |
|
__u64 vd_vblocknr; |
|
struct nilfs_period vd_period; |
|
__u64 vd_blocknr; |
|
__u64 vd_offset; |
|
__u32 vd_flags; |
|
__u32 vd_pad; |
|
}; |
|
|
|
/** |
|
* struct nilfs_bdesc - |
|
*/ |
|
struct nilfs_bdesc { |
|
__u64 bd_ino; |
|
__u64 bd_oblocknr; |
|
__u64 bd_blocknr; |
|
__u64 bd_offset; |
|
__u32 bd_level; |
|
__u32 bd_pad; |
|
}; |
|
|
|
#define NILFS_IOCTL_IDENT 'n' |
|
|
|
#define NILFS_IOCTL_CHANGE_CPMODE \ |
|
_IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode) |
|
#define NILFS_IOCTL_DELETE_CHECKPOINT \ |
|
_IOW(NILFS_IOCTL_IDENT, 0x81, __u64) |
|
#define NILFS_IOCTL_GET_CPINFO \ |
|
_IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv) |
|
#define NILFS_IOCTL_GET_CPSTAT \ |
|
_IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat) |
|
#define NILFS_IOCTL_GET_SUINFO \ |
|
_IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv) |
|
#define NILFS_IOCTL_GET_SUSTAT \ |
|
_IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat) |
|
#define NILFS_IOCTL_GET_VINFO \ |
|
_IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv) |
|
#define NILFS_IOCTL_GET_BDESCS \ |
|
_IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv) |
|
#define NILFS_IOCTL_CLEAN_SEGMENTS \ |
|
_IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5]) |
|
#define NILFS_IOCTL_SYNC \ |
|
_IOR(NILFS_IOCTL_IDENT, 0x8A, __u64) |
|
#define NILFS_IOCTL_RESIZE \ |
|
_IOW(NILFS_IOCTL_IDENT, 0x8B, __u64) |
|
|
|
#endif /* _LINUX_NILFS_FS_H */
|
|
|