Merge tag 'ceph-for-4.9-rc2' of git://github.com/ceph/ceph-client
[linux-2.6-block.git] / fs / xfs / xfs_mount.h
CommitLineData
1da177e4 1/*
7b718769
NS
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
1da177e4 4 *
7b718769
NS
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
1da177e4
LT
7 * published by the Free Software Foundation.
8 *
7b718769
NS
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
1da177e4 13 *
7b718769
NS
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4
LT
17 */
18#ifndef __XFS_MOUNT_H__
19#define __XFS_MOUNT_H__
20
ad223e60 21struct xlog;
1da177e4 22struct xfs_inode;
2a82b8be 23struct xfs_mru_cache;
5163f95a 24struct xfs_nameops;
82fa9012 25struct xfs_ail;
7d095257 26struct xfs_quotainfo;
32c5483a 27struct xfs_dir_ops;
0650b554 28struct xfs_da_geometry;
7d095257 29
055388a3
DC
30/* dynamic preallocation free space thresholds, 5% down to 1% */
31enum {
32 XFS_LOWSP_1_PCNT = 0,
33 XFS_LOWSP_2_PCNT,
34 XFS_LOWSP_3_PCNT,
35 XFS_LOWSP_4_PCNT,
36 XFS_LOWSP_5_PCNT,
37 XFS_LOWSP_MAX,
38};
39
192852be
CM
40/*
41 * Error Configuration
42 *
43 * Error classes define the subsystem the configuration belongs to.
44 * Error numbers define the errors that are configurable.
45 */
46enum {
ffd40ef6 47 XFS_ERR_METADATA,
192852be
CM
48 XFS_ERR_CLASS_MAX,
49};
50enum {
ffd40ef6 51 XFS_ERR_DEFAULT,
e0a431b3
CM
52 XFS_ERR_EIO,
53 XFS_ERR_ENOSPC,
54 XFS_ERR_ENODEV,
192852be
CM
55 XFS_ERR_ERRNO_MAX,
56};
57
a5ea70d2
CM
58#define XFS_ERR_RETRY_FOREVER -1
59
77169812
ES
60/*
61 * Although retry_timeout is in jiffies which is normally an unsigned long,
62 * we limit the retry timeout to 86400 seconds, or one day. So even a
63 * signed 32-bit long is sufficient for a HZ value up to 24855. Making it
64 * signed lets us store the special "-1" value, meaning retry forever.
65 */
192852be
CM
66struct xfs_error_cfg {
67 struct xfs_kobj kobj;
68 int max_retries;
77169812 69 long retry_timeout; /* in jiffies, -1 = infinite */
192852be
CM
70};
71
1da177e4 72typedef struct xfs_mount {
b267ce99 73 struct super_block *m_super;
1da177e4 74 xfs_tid_t m_tid; /* next unused tid for fs */
82fa9012 75 struct xfs_ail *m_ail; /* fs active log item list */
501ab323
DC
76
77 struct xfs_sb m_sb; /* copy of fs superblock */
3685c2a1 78 spinlock_t m_sb_lock; /* sb counter lock */
501ab323 79 struct percpu_counter m_icount; /* allocated inodes counter */
e88b64ea 80 struct percpu_counter m_ifree; /* free inodes counter */
0d485ada 81 struct percpu_counter m_fdblocks; /* free block counter */
501ab323 82
1da177e4
LT
83 struct xfs_buf *m_sb_bp; /* buffer for superblock */
84 char *m_fsname; /* filesystem name */
85 int m_fsname_len; /* strlen of fs name */
fc1f8c1c
NS
86 char *m_rtname; /* realtime device name */
87 char *m_logname; /* external log device name */
1da177e4
LT
88 int m_bsize; /* fs logical block size */
89 xfs_agnumber_t m_agfrotor; /* last ag where space found */
90 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
36e41eeb 91 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
1da177e4 92 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
1da177e4
LT
93 uint m_readio_log; /* min read size log bytes */
94 uint m_readio_blocks; /* min read size blocks */
95 uint m_writeio_log; /* min write size log bytes */
96 uint m_writeio_blocks; /* min write size blocks */
0650b554
DC
97 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
98 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
ad223e60 99 struct xlog *m_log; /* log specific stuff */
1da177e4
LT
100 int m_logbufs; /* number of log buffers */
101 int m_logbsize; /* size of each log buffer */
102 uint m_rsumlevels; /* rt summary levels */
103 uint m_rsumsize; /* size of rt summary, bytes */
104 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
105 struct xfs_inode *m_rsumip; /* pointer to summary inode */
106 struct xfs_inode *m_rootip; /* pointer to root directory */
107 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
108 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
109 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
110 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
1da177e4
LT
111 __uint8_t m_blkbit_log; /* blocklog + NBBY */
112 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
113 __uint8_t m_agno_log; /* log #ag's */
114 __uint8_t m_agino_log; /* #bits for agino in inum */
8f80587b 115 uint m_inode_cluster_size;/* min inode buf size */
1da177e4
LT
116 uint m_blockmask; /* sb_blocksize-1 */
117 uint m_blockwsize; /* sb_blocksize in words */
118 uint m_blockwmask; /* blockwsize-1 */
60197e8d
CH
119 uint m_alloc_mxr[2]; /* max alloc btree records */
120 uint m_alloc_mnr[2]; /* min alloc btree records */
121 uint m_bmap_dmxr[2]; /* max bmap btree records */
122 uint m_bmap_dmnr[2]; /* min bmap btree records */
123 uint m_inobt_mxr[2]; /* max inobt btree records */
124 uint m_inobt_mnr[2]; /* min inobt btree records */
035e00ac
DW
125 uint m_rmap_mxr[2]; /* max rmap btree records */
126 uint m_rmap_mnr[2]; /* min rmap btree records */
1946b91c
DW
127 uint m_refc_mxr[2]; /* max refc btree records */
128 uint m_refc_mnr[2]; /* min refc btree records */
1da177e4
LT
129 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
130 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
0d87e656 131 uint m_in_maxlevels; /* max inobt btree levels. */
035e00ac 132 uint m_rmap_maxlevels; /* max rmap btree levels */
1946b91c 133 uint m_refc_maxlevels; /* max refcount btree level */
8018026e 134 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
52548852
DW
135 uint m_alloc_set_aside; /* space we can't use */
136 uint m_ag_max_usable; /* max space per AG */
1c1c6ebc
DC
137 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
138 spinlock_t m_perag_lock; /* lock for m_perag_tree */
cc92e7ac 139 struct mutex m_growlock; /* growfs mutex */
1da177e4
LT
140 int m_fixedfsid[2]; /* unchanged for life of FS */
141 uint m_dmevmask; /* DMI events for this FS */
e718eeb4 142 __uint64_t m_flags; /* global mount flags */
1da177e4
LT
143 int m_ialloc_inos; /* inodes in inode allocation */
144 int m_ialloc_blks; /* blocks in inode allocation */
066a1884
BF
145 int m_ialloc_min_blks;/* min blocks in sparse inode
146 * allocation */
1da177e4
LT
147 int m_inoalign_mask;/* mask sb_inoalignmt if used */
148 uint m_qflags; /* quota status flags */
0eadd102 149 struct xfs_trans_resv m_resv; /* precomputed res values */
1da177e4 150 __uint64_t m_maxicount; /* maximum inode count */
1da177e4
LT
151 __uint64_t m_resblks; /* total reserved blocks */
152 __uint64_t m_resblks_avail;/* available reserved blocks */
cbe132a8 153 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */
1da177e4
LT
154 int m_dalign; /* stripe unit */
155 int m_swidth; /* stripe width */
c41564b5 156 int m_sinoalign; /* stripe unit inode alignment */
1da177e4 157 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
5163f95a 158 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
32c5483a 159 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
4bceb18f 160 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
1da177e4 161 uint m_chsize; /* size of next field */
1da177e4 162 atomic_t m_active_trans; /* number trans frozen */
2a82b8be 163 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
a7b339f1 164 struct delayed_work m_reclaim_work; /* background inode reclaim */
579b62fa
BF
165 struct delayed_work m_eofblocks_work; /* background eof blocks
166 trimming */
83104d44
DW
167 struct delayed_work m_cowblocks_work; /* background cow blocks
168 trimming */
61e63ecb 169 bool m_update_sb; /* sb needs update in mount */
055388a3
DC
170 int64_t m_low_space[XFS_LOWSP_MAX];
171 /* low free space thresholds */
a31b1d3d 172 struct xfs_kobj m_kobj;
192852be 173 struct xfs_kobj m_error_kobj;
ffd40ef6 174 struct xfs_kobj m_error_meta_kobj;
192852be 175 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
225e4635 176 struct xstats m_stats; /* per-fs stats */
aa6bf01d 177
78c931b8 178 struct workqueue_struct *m_buf_workqueue;
aa6bf01d
CH
179 struct workqueue_struct *m_data_workqueue;
180 struct workqueue_struct *m_unwritten_workqueue;
4c2d542f 181 struct workqueue_struct *m_cil_workqueue;
5889608d
DC
182 struct workqueue_struct *m_reclaim_workqueue;
183 struct workqueue_struct *m_log_workqueue;
579b62fa 184 struct workqueue_struct *m_eofblocks_workqueue;
52785112
CH
185
186 /*
187 * Generation of the filesysyem layout. This is incremented by each
188 * growfs, and used by the pNFS server to ensure the client updates
189 * its view of the block device once it gets a layout that might
190 * reference the newly added blocks. Does not need to be persistent
191 * as long as we only allow file system size increments, but if we
192 * ever support shrinks it would have to be persisted in addition
193 * to various other kinds of pain inflicted on the pNFS server.
194 */
195 __uint32_t m_generation;
801cc4e1 196
e6b3bb78 197 bool m_fail_unmount;
801cc4e1
BF
198#ifdef DEBUG
199 /*
200 * DEBUG mode instrumentation to test and/or trigger delayed allocation
201 * block killing in the event of failed writes. When enabled, all
202 * buffered writes are forced to fail. All delalloc blocks in the range
203 * of the write (including pre-existing delalloc blocks!) are tossed as
204 * part of the write failure error handling sequence.
205 */
206 bool m_fail_writes;
207#endif
1da177e4
LT
208} xfs_mount_t;
209
210/*
211 * Flags for m_flags.
212 */
92821e2b 213#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
1da177e4
LT
214 must be synchronous except
215 for space allocations */
e6b3bb78 216#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */
92821e2b 217#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
e718eeb4 218#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
1da177e4
LT
219 operations, typically for
220 disk errors in metadata */
e84661aa 221#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
e718eeb4 222#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
1da177e4 223 allocations */
13059ff0 224#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
bd186aa9 225#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
e718eeb4 226#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
e718eeb4 227#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
12c3f05c
ES
228#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */
229#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */
e718eeb4
NS
230#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
231#define XFS_MOUNT_BARRIER (1ULL << 17)
1bd960ee 232#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
e718eeb4 233#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
1da177e4 234 * allocation */
bd186aa9 235#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
e718eeb4
NS
236#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
237#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
e8c8b3a7 238 * I/O size in stat() */
2a82b8be
DC
239#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
240 allocator */
7c12f296 241#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
e8c8b3a7 242
cbe4dab1
DC
243#define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */
244
1da177e4
LT
245
246/*
247 * Default minimum read and write sizes.
248 */
249#define XFS_READIO_LOG_LARGE 16
250#define XFS_WRITEIO_LOG_LARGE 16
251
252/*
1f443ad7
NS
253 * Max and min values for mount-option defined I/O
254 * preallocation sizes.
1da177e4 255 */
1f443ad7 256#define XFS_MAX_IO_LOG 30 /* 1G */
1da177e4
LT
257#define XFS_MIN_IO_LOG PAGE_SHIFT
258
259/*
260 * Synchronous read and write sizes. This should be
261 * better for NFSv2 wsync filesystems.
262 */
9da096fd
MP
263#define XFS_WSYNC_READIO_LOG 15 /* 32k */
264#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
1da177e4 265
e8c8b3a7
DC
266/*
267 * Allow large block sizes to be reported to userspace programs if the
556b8b16 268 * "largeio" mount option is used.
e8c8b3a7
DC
269 *
270 * If compatibility mode is specified, simply return the basic unit of caching
271 * so that we don't get inefficient read/modify/write I/O from user apps.
272 * Otherwise....
273 *
274 * If the underlying volume is a stripe, then return the stripe width in bytes
275 * as the recommended I/O size. It is not a stripe and we've set a default
276 * buffered I/O size, return that, otherwise return the compat default.
277 */
278static inline unsigned long
279xfs_preferred_iosize(xfs_mount_t *mp)
280{
281 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
09cbfeaf 282 return PAGE_SIZE;
e8c8b3a7
DC
283 return (mp->m_swidth ?
284 (mp->m_swidth << mp->m_sb.sb_blocklog) :
285 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
286 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
09cbfeaf 287 PAGE_SIZE));
e8c8b3a7
DC
288}
289
92821e2b
DC
290#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
291 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
1da177e4 292#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
745f6919
CH
293void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
294 int lnnum);
1da177e4 295#define xfs_force_shutdown(m,f) \
745f6919 296 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
1da177e4 297
2b5decd0
CH
298#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
299#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
300#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
301#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
302#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
303#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
304
1da177e4
LT
305/*
306 * Flags for xfs_mountfs
307 */
764d1f89 308#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
1da177e4 309
a844f451
NS
310static inline xfs_agnumber_t
311xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
1da177e4 312{
a844f451
NS
313 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
314 do_div(ld, mp->m_sb.sb_agblocks);
315 return (xfs_agnumber_t) ld;
1da177e4
LT
316}
317
a844f451
NS
318static inline xfs_agblock_t
319xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
1da177e4 320{
a844f451
NS
321 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
322 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
1da177e4
LT
323}
324
801cc4e1
BF
325#ifdef DEBUG
326static inline bool
327xfs_mp_fail_writes(struct xfs_mount *mp)
328{
329 return mp->m_fail_writes;
330}
331#else
332static inline bool
333xfs_mp_fail_writes(struct xfs_mount *mp)
334{
335 return 0;
336}
337#endif
338
3fd129b6
DW
339/* per-AG block reservation data structures*/
340enum xfs_ag_resv_type {
341 XFS_AG_RESV_NONE = 0,
342 XFS_AG_RESV_METADATA,
343 XFS_AG_RESV_AGFL,
344};
345
346struct xfs_ag_resv {
347 /* number of blocks originally reserved here */
348 xfs_extlen_t ar_orig_reserved;
349 /* number of blocks reserved here */
350 xfs_extlen_t ar_reserved;
351 /* number of blocks originally asked for */
352 xfs_extlen_t ar_asked;
353};
354
9356fe22
DC
355/*
356 * Per-ag incore structure, copies of information in agf and agi, to improve the
4fb6e8ad 357 * performance of allocation group selection.
9356fe22
DC
358 */
359typedef struct xfs_perag {
360 struct xfs_mount *pag_mount; /* owner filesystem */
361 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
362 atomic_t pag_ref; /* perag reference count */
363 char pagf_init; /* this agf's entry is initialized */
364 char pagi_init; /* this agi's entry is initialized */
365 char pagf_metadata; /* the agf is preferred to be metadata */
366 char pagi_inodeok; /* The agi is ok for inodes */
367 __uint8_t pagf_levels[XFS_BTNUM_AGF];
368 /* # of levels in bno & cnt btree */
369 __uint32_t pagf_flcount; /* count of blocks in freelist */
370 xfs_extlen_t pagf_freeblks; /* total free blocks */
371 xfs_extlen_t pagf_longest; /* longest free space */
372 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
373 xfs_agino_t pagi_freecount; /* number of free inodes */
374 xfs_agino_t pagi_count; /* number of allocated inodes */
375
376 /*
377 * Inode allocation search lookup optimisation.
378 * If the pagino matches, the search for new inodes
379 * doesn't need to search the near ones again straight away
380 */
381 xfs_agino_t pagl_pagino;
382 xfs_agino_t pagl_leftrec;
383 xfs_agino_t pagl_rightrec;
384 spinlock_t pagb_lock; /* lock for pagb_tree */
385 struct rb_root pagb_tree; /* ordered tree of busy extents */
386
387 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
388
389 spinlock_t pag_ici_lock; /* incore inode cache lock */
390 struct radix_tree_root pag_ici_root; /* incore inode cache root */
391 int pag_ici_reclaimable; /* reclaimable inodes */
392 struct mutex pag_ici_reclaim_lock; /* serialisation point */
393 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
394
395 /* buffer cache index */
396 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */
397 struct rb_root pag_buf_tree; /* ordered tree of active buffers */
398
399 /* for rcu-safe freeing */
400 struct rcu_head rcu_head;
401 int pagb_count; /* pagb slots in use */
3fd129b6
DW
402
403 /* Blocks reserved for all kinds of metadata. */
404 struct xfs_ag_resv pag_meta_resv;
405 /* Blocks reserved for just AGFL-based metadata. */
406 struct xfs_ag_resv pag_agfl_resv;
46eeb521
DW
407
408 /* reference count */
409 __uint8_t pagf_refcount_level;
9356fe22
DC
410} xfs_perag_t;
411
3fd129b6
DW
412static inline struct xfs_ag_resv *
413xfs_perag_resv(
414 struct xfs_perag *pag,
415 enum xfs_ag_resv_type type)
416{
417 switch (type) {
418 case XFS_AG_RESV_METADATA:
419 return &pag->pag_meta_resv;
420 case XFS_AG_RESV_AGFL:
421 return &pag->pag_agfl_resv;
422 default:
423 return NULL;
424 }
425}
426
af3b6382 427extern void xfs_uuid_table_free(void);
adab0f67 428extern int xfs_log_sbcount(xfs_mount_t *);
d5db0f97 429extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
4249023a 430extern int xfs_mountfs(xfs_mount_t *mp);
ff55068c
DC
431extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
432 xfs_agnumber_t *maxagi);
41b5c2e7 433extern void xfs_unmountfs(xfs_mount_t *);
964aa8d9 434
501ab323 435extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
e88b64ea 436extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
0d485ada
DC
437extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
438 bool reserved);
bab98bbe
DC
439extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
440
1da177e4 441extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
764d1f89 442extern int xfs_readsb(xfs_mount_t *, int);
1da177e4 443extern void xfs_freesb(xfs_mount_t *);
91ee575f 444extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
4cc929ee 445extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
1da177e4 446
d7658d48
CH
447extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
448
055388a3
DC
449extern void xfs_set_low_space_thresholds(struct xfs_mount *);
450
3fbbbea3
DC
451int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
452 xfs_off_t count_fsb);
453
df309390
CM
454struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
455 int error_class, int error);
456
1da177e4 457#endif /* __XFS_MOUNT_H__ */