2 * nilfs2_fs.h - NILFS2 on-disk structures and common declarations.
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Written by Koji Sato <koji@osrg.net>
21 * Ryusuke Konishi <ryusuke@osrg.net>
24 * linux/include/linux/ext2_fs.h
26 * Copyright (C) 1992, 1993, 1994, 1995
27 * Remy Card (card@masi.ibp.fr)
28 * Laboratoire MASI - Institut Blaise Pascal
29 * Universite Pierre et Marie Curie (Paris VI)
33 * linux/include/linux/minix_fs.h
35 * Copyright (C) 1991, 1992 Linus Torvalds
38 #ifndef _LINUX_NILFS_FS_H
39 #define _LINUX_NILFS_FS_H
41 #include <linux/types.h>
42 #include <linux/ioctl.h>
45 * Inode flags stored in nilfs_inode and on-memory nilfs inode
47 * We define these flags based on ext2-fs because of the
48 * compatibility reason; to avoid problems in chattr(1)
50 #define NILFS_SECRM_FL 0x00000001 /* Secure deletion */
51 #define NILFS_UNRM_FL 0x00000002 /* Undelete */
52 #define NILFS_SYNC_FL 0x00000008 /* Synchronous updates */
53 #define NILFS_IMMUTABLE_FL 0x00000010 /* Immutable file */
54 #define NILFS_APPEND_FL 0x00000020 /* writes to file may only append */
55 #define NILFS_NODUMP_FL 0x00000040 /* do not dump file */
56 #define NILFS_NOATIME_FL 0x00000080 /* do not update atime */
57 /* Reserved for compression usage... */
58 #define NILFS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
59 #define NILFS_DIRSYNC_FL 0x00010000 /* dirsync behaviour */
61 #define NILFS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
62 #define NILFS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
65 #define NILFS_INODE_BMAP_SIZE 7
67 * struct nilfs_inode - structure of an inode on disk
68 * @i_blocks: blocks count
69 * @i_size: size in bytes
70 * @i_ctime: creation time (seconds)
71 * @i_mtime: modification time (seconds)
72 * @i_ctime_nsec: creation time (nano seconds)
73 * @i_mtime_nsec: modification time (nano seconds)
77 * @i_links_count: links count
78 * @i_flags: file flags
79 * @i_bmap: block mapping
80 * @i_xattr: extended attributes
81 * @i_generation: file generation (for NFS)
96 __le64 i_bmap
[NILFS_INODE_BMAP_SIZE
];
97 #define i_device_code i_bmap[0]
104 * struct nilfs_super_root - structure of super root
106 * @sr_bytes: byte count of the structure
107 * @sr_flags: flags (reserved)
108 * @sr_nongc_ctime: write time of the last segment not for cleaner operation
109 * @sr_dat: DAT file inode
110 * @sr_cpfile: checkpoint file inode
111 * @sr_sufile: segment usage file inode
113 struct nilfs_super_root
{
117 __le64 sr_nongc_ctime
;
118 struct nilfs_inode sr_dat
;
119 struct nilfs_inode sr_cpfile
;
120 struct nilfs_inode sr_sufile
;
123 #define NILFS_SR_MDT_OFFSET(inode_size, i) \
124 ((unsigned long)&((struct nilfs_super_root *)0)->sr_dat + \
126 #define NILFS_SR_DAT_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 0)
127 #define NILFS_SR_CPFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 1)
128 #define NILFS_SR_SUFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 2)
129 #define NILFS_SR_BYTES (sizeof(struct nilfs_super_root))
132 * Maximal mount counts
134 #define NILFS_DFL_MAX_MNT_COUNT 50 /* 50 mounts */
137 * File system states (sbp->s_state, nilfs->ns_mount_state)
139 #define NILFS_VALID_FS 0x0001 /* Unmounted cleanly */
140 #define NILFS_ERROR_FS 0x0002 /* Errors detected */
141 #define NILFS_RESIZE_FS 0x0004 /* Resize required */
144 * Mount flags (sbi->s_mount_opt)
146 #define NILFS_MOUNT_ERROR_MODE 0x0070 /* Error mode mask */
147 #define NILFS_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
148 #define NILFS_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
149 #define NILFS_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
150 #define NILFS_MOUNT_SNAPSHOT 0x0080 /* Snapshot flag */
151 #define NILFS_MOUNT_BARRIER 0x1000 /* Use block barriers */
152 #define NILFS_MOUNT_STRICT_ORDER 0x2000 /* Apply strict in-order
153 semantics also for data */
154 #define NILFS_MOUNT_NORECOVERY 0x4000 /* Disable write access during
155 mount-time recovery */
156 #define NILFS_MOUNT_DISCARD 0x8000 /* Issue DISCARD requests */
160 * struct nilfs_super_block - structure of super block on disk
162 struct nilfs_super_block
{
163 /*00*/ __le32 s_rev_level
; /* Revision level */
164 __le16 s_minor_rev_level
; /* minor revision level */
165 __le16 s_magic
; /* Magic signature */
167 __le16 s_bytes
; /* Bytes count of CRC calculation
168 for this structure. s_reserved
170 __le16 s_flags
; /* flags */
171 __le32 s_crc_seed
; /* Seed value of CRC calculation */
172 /*10*/ __le32 s_sum
; /* Check sum of super block */
174 __le32 s_log_block_size
; /* Block size represented as follows
176 1 << (s_log_block_size + 10) */
177 __le64 s_nsegments
; /* Number of segments in filesystem */
178 /*20*/ __le64 s_dev_size
; /* block device size in bytes */
179 __le64 s_first_data_block
; /* 1st seg disk block number */
180 /*30*/ __le32 s_blocks_per_segment
; /* number of blocks per full segment */
181 __le32 s_r_segments_percentage
; /* Reserved segments percentage */
183 __le64 s_last_cno
; /* Last checkpoint number */
184 /*40*/ __le64 s_last_pseg
; /* disk block addr pseg written last */
185 __le64 s_last_seq
; /* seq. number of seg written last */
186 /*50*/ __le64 s_free_blocks_count
; /* Free blocks count */
188 __le64 s_ctime
; /* Creation time (execution time of
190 /*60*/ __le64 s_mtime
; /* Mount time */
191 __le64 s_wtime
; /* Write time */
192 /*70*/ __le16 s_mnt_count
; /* Mount count */
193 __le16 s_max_mnt_count
; /* Maximal mount count */
194 __le16 s_state
; /* File system state */
195 __le16 s_errors
; /* Behaviour when detecting errors */
196 __le64 s_lastcheck
; /* time of last check */
198 /*80*/ __le32 s_checkinterval
; /* max. time between checks */
199 __le32 s_creator_os
; /* OS */
200 __le16 s_def_resuid
; /* Default uid for reserved blocks */
201 __le16 s_def_resgid
; /* Default gid for reserved blocks */
202 __le32 s_first_ino
; /* First non-reserved inode */
204 /*90*/ __le16 s_inode_size
; /* Size of an inode */
205 __le16 s_dat_entry_size
; /* Size of a dat entry */
206 __le16 s_checkpoint_size
; /* Size of a checkpoint */
207 __le16 s_segment_usage_size
; /* Size of a segment usage */
209 /*98*/ __u8 s_uuid
[16]; /* 128-bit uuid for volume */
210 /*A8*/ char s_volume_name
[80]; /* volume name */
212 /*F8*/ __le32 s_c_interval
; /* Commit interval of segment */
213 __le32 s_c_block_max
; /* Threshold of data amount for
214 the segment construction */
215 /*100*/ __le64 s_feature_compat
; /* Compatible feature set */
216 __le64 s_feature_compat_ro
; /* Read-only compatible feature set */
217 __le64 s_feature_incompat
; /* Incompatible feature set */
218 __u32 s_reserved
[186]; /* padding to the end of the block */
222 * Codes for operating systems
224 #define NILFS_OS_LINUX 0
225 /* Codes from 1 to 4 are reserved to keep compatibility with ext2 creator-OS */
230 #define NILFS_CURRENT_REV 2 /* current major revision */
231 #define NILFS_MINOR_REV 0 /* minor revision */
234 * Feature set definitions
236 * If there is a bit set in the incompatible feature set that the kernel
237 * doesn't know about, it should refuse to mount the filesystem.
239 #define NILFS_FEATURE_COMPAT_SUPP 0ULL
240 #define NILFS_FEATURE_COMPAT_RO_SUPP 0ULL
241 #define NILFS_FEATURE_INCOMPAT_SUPP 0ULL
244 * Bytes count of super_block for CRC-calculation
246 #define NILFS_SB_BYTES \
247 ((long)&((struct nilfs_super_block *)0)->s_reserved)
250 * Special inode number
252 #define NILFS_ROOT_INO 2 /* Root file inode */
253 #define NILFS_DAT_INO 3 /* DAT file */
254 #define NILFS_CPFILE_INO 4 /* checkpoint file */
255 #define NILFS_SUFILE_INO 5 /* segment usage file */
256 #define NILFS_IFILE_INO 6 /* ifile */
257 #define NILFS_ATIME_INO 7 /* Atime file (reserved) */
258 #define NILFS_XATTR_INO 8 /* Xattribute file (reserved) */
259 #define NILFS_SKETCH_INO 10 /* Sketch file */
260 #define NILFS_USER_INO 11 /* Fisrt user's file inode number */
262 #define NILFS_SB_OFFSET_BYTES 1024 /* byte offset of nilfs superblock */
263 #define NILFS_SUPER_MAGIC 0x3434 /* NILFS filesystem magic number */
265 #define NILFS_SEG_MIN_BLOCKS 16 /* Minimum number of blocks in
267 #define NILFS_PSEG_MIN_BLOCKS 2 /* Minimum number of blocks in
269 #define NILFS_MIN_NRSVSEGS 8 /* Minimum number of reserved
273 * bytes offset of secondary super block
275 #define NILFS_SB2_OFFSET_BYTES(devsize) ((((devsize) >> 12) - 1) << 12)
278 * Maximal count of links to a file
280 #define NILFS_LINK_MAX 32000
283 * Structure of a directory entry
287 #define NILFS_NAME_LEN 255
290 * Block size limitations
292 #define NILFS_MIN_BLOCK_SIZE 1024
293 #define NILFS_MAX_BLOCK_SIZE 65536
296 * The new version of the directory entry. Since V0 structures are
297 * stored in intel byte order, and the name_len field could never be
298 * bigger than 255 chars, it's safe to reclaim the extra byte for the
301 struct nilfs_dir_entry
{
302 __le64 inode
; /* Inode number */
303 __le16 rec_len
; /* Directory entry length */
304 __u8 name_len
; /* Name length */
306 char name
[NILFS_NAME_LEN
]; /* File name */
311 * NILFS directory file types. Only the low 3 bits are used. The
312 * other bits are reserved for now.
327 * NILFS_DIR_PAD defines the directory entries boundaries
329 * NOTE: It must be a multiple of 8
331 #define NILFS_DIR_PAD 8
332 #define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
333 #define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & \
335 #define NILFS_MAX_REC_LEN ((1<<16)-1)
337 static inline unsigned nilfs_rec_len_from_disk(__le16 dlen
)
339 unsigned len
= le16_to_cpu(dlen
);
341 if (len
== NILFS_MAX_REC_LEN
)
346 static inline __le16
nilfs_rec_len_to_disk(unsigned len
)
348 if (len
== (1 << 16))
349 return cpu_to_le16(NILFS_MAX_REC_LEN
);
350 else if (len
> (1 << 16))
352 return cpu_to_le16(len
);
356 * struct nilfs_finfo - file information
357 * @fi_ino: inode number
358 * @fi_cno: checkpoint number
359 * @fi_nblocks: number of blocks (including intermediate blocks)
360 * @fi_ndatablk: number of file data blocks
367 /* array of virtual block numbers */
371 * struct nilfs_binfo_v - information for the block to which a virtual block number is assigned
372 * @bi_vblocknr: virtual block number
373 * @bi_blkoff: block offset
375 struct nilfs_binfo_v
{
381 * struct nilfs_binfo_dat - information for the block which belongs to the DAT file
382 * @bi_blkoff: block offset
386 struct nilfs_binfo_dat
{
393 * union nilfs_binfo: block information
394 * @bi_v: nilfs_binfo_v structure
395 * @bi_dat: nilfs_binfo_dat structure
398 struct nilfs_binfo_v bi_v
;
399 struct nilfs_binfo_dat bi_dat
;
403 * struct nilfs_segment_summary - segment summary
404 * @ss_datasum: checksum of data
405 * @ss_sumsum: checksum of segment summary
406 * @ss_magic: magic number
407 * @ss_bytes: size of this structure in bytes
409 * @ss_seq: sequence number
410 * @ss_create: creation timestamp
411 * @ss_next: next segment
412 * @ss_nblocks: number of blocks
413 * @ss_nfinfo: number of finfo structures
414 * @ss_sumbytes: total size of segment summary in bytes
416 * @ss_cno: checkpoint number
418 struct nilfs_segment_summary
{
432 /* array of finfo structures */
435 #define NILFS_SEGSUM_MAGIC 0x1eaffa11 /* segment summary magic number */
438 * Segment summary flags
440 #define NILFS_SS_LOGBGN 0x0001 /* begins a logical segment */
441 #define NILFS_SS_LOGEND 0x0002 /* ends a logical segment */
442 #define NILFS_SS_SR 0x0004 /* has super root */
443 #define NILFS_SS_SYNDT 0x0008 /* includes data only updates */
444 #define NILFS_SS_GC 0x0010 /* segment written for cleaner operation */
447 * struct nilfs_btree_node - B-tree node
450 * @bn_nchildren: number of children
453 struct nilfs_btree_node
{
461 #define NILFS_BTREE_NODE_ROOT 0x01
464 #define NILFS_BTREE_LEVEL_DATA 0
465 #define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1)
466 #define NILFS_BTREE_LEVEL_MAX 14
469 * struct nilfs_palloc_group_desc - block group descriptor
470 * @pg_nfrees: number of free entries in block group
472 struct nilfs_palloc_group_desc
{
477 * struct nilfs_dat_entry - disk address translation entry
478 * @de_blocknr: block number
479 * @de_start: start checkpoint number
480 * @de_end: end checkpoint number
481 * @de_rsv: reserved for future use
483 struct nilfs_dat_entry
{
491 * struct nilfs_snapshot_list - snapshot list
492 * @ssl_next: next checkpoint number on snapshot list
493 * @ssl_prev: previous checkpoint number on snapshot list
495 struct nilfs_snapshot_list
{
501 * struct nilfs_checkpoint - checkpoint structure
503 * @cp_checkpoints_count: checkpoints count in a block
504 * @cp_snapshot_list: snapshot list
505 * @cp_cno: checkpoint number
506 * @cp_create: creation timestamp
507 * @cp_nblk_inc: number of blocks incremented by this checkpoint
508 * @cp_inodes_count: inodes count
509 * @cp_blocks_count: blocks count
510 * @cp_ifile_inode: inode of ifile
512 struct nilfs_checkpoint
{
514 __le32 cp_checkpoints_count
;
515 struct nilfs_snapshot_list cp_snapshot_list
;
519 __le64 cp_inodes_count
;
520 __le64 cp_blocks_count
; /* Reserved (might be deleted) */
522 /* Do not change the byte offset of ifile inode.
523 To keep the compatibility of the disk format,
524 additional fields should be added behind cp_ifile_inode. */
525 struct nilfs_inode cp_ifile_inode
;
528 /* checkpoint flags */
530 NILFS_CHECKPOINT_SNAPSHOT
,
531 NILFS_CHECKPOINT_INVALID
,
532 NILFS_CHECKPOINT_SKETCH
,
533 NILFS_CHECKPOINT_MINOR
,
536 #define NILFS_CHECKPOINT_FNS(flag, name) \
538 nilfs_checkpoint_set_##name(struct nilfs_checkpoint *cp) \
540 cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) | \
541 (1UL << NILFS_CHECKPOINT_##flag)); \
544 nilfs_checkpoint_clear_##name(struct nilfs_checkpoint *cp) \
546 cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) & \
547 ~(1UL << NILFS_CHECKPOINT_##flag)); \
550 nilfs_checkpoint_##name(const struct nilfs_checkpoint *cp) \
552 return !!(le32_to_cpu(cp->cp_flags) & \
553 (1UL << NILFS_CHECKPOINT_##flag)); \
556 NILFS_CHECKPOINT_FNS(SNAPSHOT
, snapshot
)
557 NILFS_CHECKPOINT_FNS(INVALID
, invalid
)
558 NILFS_CHECKPOINT_FNS(MINOR
, minor
)
561 * struct nilfs_cpinfo - checkpoint information
564 * @ci_cno: checkpoint number
565 * @ci_create: creation timestamp
566 * @ci_nblk_inc: number of blocks incremented by this checkpoint
567 * @ci_inodes_count: inodes count
568 * @ci_blocks_count: blocks count
569 * @ci_next: next checkpoint number in snapshot list
571 struct nilfs_cpinfo
{
577 __u64 ci_inodes_count
;
578 __u64 ci_blocks_count
;
582 #define NILFS_CPINFO_FNS(flag, name) \
584 nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \
586 return !!(cpinfo->ci_flags & (1UL << NILFS_CHECKPOINT_##flag)); \
589 NILFS_CPINFO_FNS(SNAPSHOT
, snapshot
)
590 NILFS_CPINFO_FNS(INVALID
, invalid
)
591 NILFS_CPINFO_FNS(MINOR
, minor
)
595 * struct nilfs_cpfile_header - checkpoint file header
596 * @ch_ncheckpoints: number of checkpoints
597 * @ch_nsnapshots: number of snapshots
598 * @ch_snapshot_list: snapshot list
600 struct nilfs_cpfile_header
{
601 __le64 ch_ncheckpoints
;
602 __le64 ch_nsnapshots
;
603 struct nilfs_snapshot_list ch_snapshot_list
;
606 #define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \
607 ((sizeof(struct nilfs_cpfile_header) + \
608 sizeof(struct nilfs_checkpoint) - 1) / \
609 sizeof(struct nilfs_checkpoint))
612 * struct nilfs_segment_usage - segment usage
613 * @su_lastmod: last modified timestamp
614 * @su_nblocks: number of blocks in segment
617 struct nilfs_segment_usage
{
623 /* segment usage flag */
625 NILFS_SEGMENT_USAGE_ACTIVE
,
626 NILFS_SEGMENT_USAGE_DIRTY
,
627 NILFS_SEGMENT_USAGE_ERROR
,
632 #define NILFS_SEGMENT_USAGE_FNS(flag, name) \
634 nilfs_segment_usage_set_##name(struct nilfs_segment_usage *su) \
636 su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) | \
637 (1UL << NILFS_SEGMENT_USAGE_##flag));\
640 nilfs_segment_usage_clear_##name(struct nilfs_segment_usage *su) \
643 cpu_to_le32(le32_to_cpu(su->su_flags) & \
644 ~(1UL << NILFS_SEGMENT_USAGE_##flag)); \
647 nilfs_segment_usage_##name(const struct nilfs_segment_usage *su) \
649 return !!(le32_to_cpu(su->su_flags) & \
650 (1UL << NILFS_SEGMENT_USAGE_##flag)); \
653 NILFS_SEGMENT_USAGE_FNS(ACTIVE
, active
)
654 NILFS_SEGMENT_USAGE_FNS(DIRTY
, dirty
)
655 NILFS_SEGMENT_USAGE_FNS(ERROR
, error
)
658 nilfs_segment_usage_set_clean(struct nilfs_segment_usage
*su
)
660 su
->su_lastmod
= cpu_to_le64(0);
661 su
->su_nblocks
= cpu_to_le32(0);
662 su
->su_flags
= cpu_to_le32(0);
666 nilfs_segment_usage_clean(const struct nilfs_segment_usage
*su
)
668 return !le32_to_cpu(su
->su_flags
);
672 * struct nilfs_sufile_header - segment usage file header
673 * @sh_ncleansegs: number of clean segments
674 * @sh_ndirtysegs: number of dirty segments
675 * @sh_last_alloc: last allocated segment number
677 struct nilfs_sufile_header
{
678 __le64 sh_ncleansegs
;
679 __le64 sh_ndirtysegs
;
680 __le64 sh_last_alloc
;
684 #define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \
685 ((sizeof(struct nilfs_sufile_header) + \
686 sizeof(struct nilfs_segment_usage) - 1) / \
687 sizeof(struct nilfs_segment_usage))
690 * nilfs_suinfo - segment usage information
695 struct nilfs_suinfo
{
701 #define NILFS_SUINFO_FNS(flag, name) \
703 nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
705 return si->sui_flags & (1UL << NILFS_SEGMENT_USAGE_##flag); \
708 NILFS_SUINFO_FNS(ACTIVE
, active
)
709 NILFS_SUINFO_FNS(DIRTY
, dirty
)
710 NILFS_SUINFO_FNS(ERROR
, error
)
712 static inline int nilfs_suinfo_clean(const struct nilfs_suinfo
*si
)
714 return !si
->sui_flags
;
724 * struct nilfs_cpmode -
728 struct nilfs_cpmode
{
735 * struct nilfs_argv - argument vector
744 __u32 v_nmembs
; /* number of members */
745 __u16 v_size
; /* size of members */
751 * struct nilfs_period -
755 struct nilfs_period
{
761 * struct nilfs_cpstat -
762 * @cs_cno: checkpoint number
763 * @cs_ncps: number of checkpoints
764 * @cs_nsss: number of snapshots
766 struct nilfs_cpstat
{
773 * struct nilfs_sustat -
774 * @ss_nsegs: number of segments
775 * @ss_ncleansegs: number of clean segments
776 * @ss_ndirtysegs: number of dirty segments
777 * @ss_ctime: creation time of the last segment
778 * @ss_nongc_ctime: creation time of the last segment not for GC
779 * @ss_prot_seq: least sequence number of segments which must not be reclaimed
781 struct nilfs_sustat
{
786 __u64 ss_nongc_ctime
;
791 * struct nilfs_vinfo - virtual block number information
805 * struct nilfs_vdesc -
811 struct nilfs_period vd_period
;
819 * struct nilfs_bdesc -
830 #define NILFS_IOCTL_IDENT 'n'
832 #define NILFS_IOCTL_CHANGE_CPMODE \
833 _IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
834 #define NILFS_IOCTL_DELETE_CHECKPOINT \
835 _IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
836 #define NILFS_IOCTL_GET_CPINFO \
837 _IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
838 #define NILFS_IOCTL_GET_CPSTAT \
839 _IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
840 #define NILFS_IOCTL_GET_SUINFO \
841 _IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
842 #define NILFS_IOCTL_GET_SUSTAT \
843 _IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
844 #define NILFS_IOCTL_GET_VINFO \
845 _IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
846 #define NILFS_IOCTL_GET_BDESCS \
847 _IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
848 #define NILFS_IOCTL_CLEAN_SEGMENTS \
849 _IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
850 #define NILFS_IOCTL_SYNC \
851 _IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
852 #define NILFS_IOCTL_RESIZE \
853 _IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
855 #endif /* _LINUX_NILFS_FS_H */