forked from luck/tmp_suning_uos_patched
nilfs2: disk format and userland interface
This adds a header file which specifies the on-disk format and ioctl interface of the nilfs2 file system. Signed-off-by: Koji Sato <sato.koji@lab.ntt.co.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Koji Sato
Linus Torvalds
parent
962281a7ab
commit
eed10e39b1
854
include/linux/nilfs2_fs.h
Normal file
854
include/linux/nilfs2_fs.h
Normal file
@ -0,0 +1,854 @@
|
||||
/*
|
||||
* 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,
|
||||
};
|
||||
|
||||
#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(SKETCH, sketch)
|
||||
|
||||
/**
|
||||
* struct nilfs_cpinfo - checkpoint information
|
||||
* @ci_flags: flags
|
||||
* @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;
|
||||
__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(SKETCH, sketch)
|
||||
|
||||
|
||||
/**
|
||||
* 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,
|
||||
|
||||
/* on-memory only */
|
||||
NILFS_SEGMENT_USAGE_VOLATILE_ACTIVE,
|
||||
/* ... */
|
||||
};
|
||||
|
||||
#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)
|
||||
NILFS_SEGMENT_USAGE_FNS(VOLATILE_ACTIVE, volatile_active)
|
||||
|
||||
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)
|
||||
NILFS_SUINFO_FNS(VOLATILE_ACTIVE, volatile_active)
|
||||
|
||||
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;
|
||||
int cm_mode;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct nilfs_argv - argument vector
|
||||
* @v_base:
|
||||
* @v_nmembs:
|
||||
* @v_size:
|
||||
* @v_index:
|
||||
* @v_flags:
|
||||
*/
|
||||
struct nilfs_argv {
|
||||
void *v_base;
|
||||
size_t v_nmembs; /* number of members */
|
||||
size_t v_size; /* size of members */
|
||||
int v_index;
|
||||
int v_flags;
|
||||
};
|
||||
|
||||
/**
|
||||
* 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:
|
||||
* @ss_nongc_ctime:
|
||||
*/
|
||||
struct nilfs_sustat {
|
||||
__u64 ss_nsegs;
|
||||
__u64 ss_ncleansegs;
|
||||
__u64 ss_ndirtysegs;
|
||||
time_t ss_ctime;
|
||||
time_t ss_nongc_ctime;
|
||||
};
|
||||
|
||||
/**
|
||||
* 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;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct nilfs_bdesc -
|
||||
*/
|
||||
struct nilfs_bdesc {
|
||||
__u64 bd_ino;
|
||||
__u64 bd_oblocknr;
|
||||
__u64 bd_blocknr;
|
||||
__u64 bd_offset;
|
||||
__u32 bd_level;
|
||||
};
|
||||
|
||||
#define NILFS_TIMEDWAIT_WRITE_LOCKED 0x1
|
||||
#define NILFS_TIMEDWAIT_SEG_WRITE 0x2
|
||||
|
||||
/**
|
||||
* struct nilfs_wait_cond -
|
||||
*/
|
||||
struct nilfs_wait_cond {
|
||||
int wc_cond;
|
||||
int wc_flags;
|
||||
struct timespec wc_timeout;
|
||||
};
|
||||
|
||||
#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_TIMEDWAIT \
|
||||
_IOWR(NILFS_IOCTL_IDENT, 0x89, struct nilfs_wait_cond)
|
||||
#define NILFS_IOCTL_SYNC \
|
||||
_IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
|
||||
#define NILFS_IOCTL_RESIZE \
|
||||
_IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
|
||||
|
||||
/* compat_ioctl */
|
||||
#ifdef CONFIG_COMPAT
|
||||
#include <linux/compat.h>
|
||||
|
||||
struct nilfs_cpmode32 {
|
||||
__u64 cm_cno;
|
||||
compat_int_t cm_mode;
|
||||
};
|
||||
|
||||
struct nilfs_argv32 {
|
||||
compat_caddr_t v_base;
|
||||
compat_size_t v_nmembs;
|
||||
compat_size_t v_size;
|
||||
compat_int_t v_index;
|
||||
compat_int_t v_flags;
|
||||
};
|
||||
|
||||
struct nilfs_sustat32 {
|
||||
__u64 ss_nsegs;
|
||||
__u64 ss_ncleansegs;
|
||||
__u64 ss_ndirtysegs;
|
||||
compat_time_t ss_ctime;
|
||||
compat_time_t ss_nongc_ctime;
|
||||
};
|
||||
|
||||
struct nilfs_wait_cond32 {
|
||||
compat_int_t wc_cond;
|
||||
compat_int_t wc_flags;
|
||||
struct compat_timespec wc_timeout;
|
||||
};
|
||||
|
||||
#define NILFS_IOCTL32_CHANGE_CPMODE \
|
||||
_IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode32)
|
||||
#define NILFS_IOCTL32_GET_CPINFO \
|
||||
_IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv32)
|
||||
#define NILFS_IOCTL32_GET_SUINFO \
|
||||
_IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv32)
|
||||
#define NILFS_IOCTL32_GET_SUSTAT \
|
||||
_IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat32)
|
||||
#define NILFS_IOCTL32_GET_VINFO \
|
||||
_IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv32)
|
||||
#define NILFS_IOCTL32_GET_BDESCS \
|
||||
_IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv32)
|
||||
#define NILFS_IOCTL32_CLEAN_SEGMENTS \
|
||||
_IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv32[5])
|
||||
#define NILFS_IOCTL32_TIMEDWAIT \
|
||||
_IOWR(NILFS_IOCTL_IDENT, 0x89, struct nilfs_wait_cond32)
|
||||
#endif /* CONFIG_COMPAT */
|
||||
|
||||
#endif /* _LINUX_NILFS_FS_H */
|
||||
Loading…
Reference in New Issue
Block a user