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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#ifndef __XFS_MOUNT_H__
7#define __XFS_MOUNT_H__
8
9struct xlog;
10struct xfs_inode;
11struct xfs_mru_cache;
12struct xfs_ail;
13struct xfs_quotainfo;
14struct xfs_da_geometry;
15struct xfs_perag;
16
17/* dynamic preallocation free space thresholds, 5% down to 1% */
18enum {
19 XFS_LOWSP_1_PCNT = 0,
20 XFS_LOWSP_2_PCNT,
21 XFS_LOWSP_3_PCNT,
22 XFS_LOWSP_4_PCNT,
23 XFS_LOWSP_5_PCNT,
24 XFS_LOWSP_MAX,
25};
26
27/*
28 * Error Configuration
29 *
30 * Error classes define the subsystem the configuration belongs to.
31 * Error numbers define the errors that are configurable.
32 */
33enum {
34 XFS_ERR_METADATA,
35 XFS_ERR_CLASS_MAX,
36};
37enum {
38 XFS_ERR_DEFAULT,
39 XFS_ERR_EIO,
40 XFS_ERR_ENOSPC,
41 XFS_ERR_ENODEV,
42 XFS_ERR_ERRNO_MAX,
43};
44
45#define XFS_ERR_RETRY_FOREVER -1
46
47/*
48 * Although retry_timeout is in jiffies which is normally an unsigned long,
49 * we limit the retry timeout to 86400 seconds, or one day. So even a
50 * signed 32-bit long is sufficient for a HZ value up to 24855. Making it
51 * signed lets us store the special "-1" value, meaning retry forever.
52 */
53struct xfs_error_cfg {
54 struct xfs_kobj kobj;
55 int max_retries;
56 long retry_timeout; /* in jiffies, -1 = infinite */
57};
58
59/*
60 * Per-cpu deferred inode inactivation GC lists.
61 */
62struct xfs_inodegc {
63 struct xfs_mount *mp;
64 struct llist_head list;
65 struct delayed_work work;
66 int error;
67
68 /* approximate count of inodes in the list */
69 unsigned int items;
70 unsigned int shrinker_hits;
71 unsigned int cpu;
72};
73
74/*
75 * Container for each type of groups, used to look up individual groups and
76 * describes the geometry.
77 */
78struct xfs_groups {
79 struct xarray xa;
80
81 /*
82 * Maximum capacity of the group in FSBs.
83 *
84 * Each group is laid out densely in the daddr space. For the
85 * degenerate case of a pre-rtgroups filesystem, the incore rtgroup
86 * pretends to have a zero-block and zero-blklog rtgroup.
87 */
88 uint32_t blocks;
89
90 /*
91 * Log(2) of the logical size of each group.
92 *
93 * Compared to the blocks field above this is rounded up to the next
94 * power of two, and thus lays out the xfs_fsblock_t/xfs_rtblock_t
95 * space sparsely with a hole from blocks to (1 << blklog) at the end
96 * of each group.
97 */
98 uint8_t blklog;
99
100 /*
101 * Mask to extract the group-relative block number from a FSB.
102 * For a pre-rtgroups filesystem we pretend to have one very large
103 * rtgroup, so this mask must be 64-bit.
104 */
105 uint64_t blkmask;
106};
107
108/*
109 * The struct xfsmount layout is optimised to separate read-mostly variables
110 * from variables that are frequently modified. We put the read-mostly variables
111 * first, then place all the other variables at the end.
112 *
113 * Typically, read-mostly variables are those that are set at mount time and
114 * never changed again, or only change rarely as a result of things like sysfs
115 * knobs being tweaked.
116 */
117typedef struct xfs_mount {
118 struct xfs_sb m_sb; /* copy of fs superblock */
119 struct super_block *m_super;
120 struct xfs_ail *m_ail; /* fs active log item list */
121 struct xfs_buf *m_sb_bp; /* buffer for superblock */
122 struct xfs_buf *m_rtsb_bp; /* realtime superblock */
123 char *m_rtname; /* realtime device name */
124 char *m_logname; /* external log device name */
125 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
126 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
127 struct xlog *m_log; /* log specific stuff */
128 struct xfs_inode *m_rootip; /* pointer to root directory */
129 struct xfs_inode *m_metadirip; /* ptr to metadata directory */
130 struct xfs_inode *m_rtdirip; /* ptr to realtime metadir */
131 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
132 struct xfs_buftarg *m_ddev_targp; /* data device */
133 struct xfs_buftarg *m_logdev_targp;/* log device */
134 struct xfs_buftarg *m_rtdev_targp; /* rt device */
135 void __percpu *m_inodegc; /* percpu inodegc structures */
136 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
137 struct workqueue_struct *m_buf_workqueue;
138 struct workqueue_struct *m_unwritten_workqueue;
139 struct workqueue_struct *m_reclaim_workqueue;
140 struct workqueue_struct *m_sync_workqueue;
141 struct workqueue_struct *m_blockgc_wq;
142 struct workqueue_struct *m_inodegc_wq;
143
144 int m_bsize; /* fs logical block size */
145 uint8_t m_blkbit_log; /* blocklog + NBBY */
146 uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
147 uint8_t m_agno_log; /* log #ag's */
148 uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
149 int8_t m_rtxblklog; /* log2 of rextsize, if possible */
150
151 uint m_blockmask; /* sb_blocksize-1 */
152 uint m_blockwsize; /* sb_blocksize in words */
153 /* number of rt extents per rt bitmap block if rtgroups enabled */
154 unsigned int m_rtx_per_rbmblock;
155 uint m_alloc_mxr[2]; /* max alloc btree records */
156 uint m_alloc_mnr[2]; /* min alloc btree records */
157 uint m_bmap_dmxr[2]; /* max bmap btree records */
158 uint m_bmap_dmnr[2]; /* min bmap btree records */
159 uint m_rmap_mxr[2]; /* max rmap btree records */
160 uint m_rmap_mnr[2]; /* min rmap btree records */
161 uint m_refc_mxr[2]; /* max refc btree records */
162 uint m_refc_mnr[2]; /* min refc btree records */
163 uint m_alloc_maxlevels; /* max alloc btree levels */
164 uint m_bm_maxlevels[2]; /* max bmap btree levels */
165 uint m_rmap_maxlevels; /* max rmap btree levels */
166 uint m_refc_maxlevels; /* max refcount btree level */
167 unsigned int m_agbtree_maxlevels; /* max level of all AG btrees */
168 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
169 uint m_alloc_set_aside; /* space we can't use */
170 uint m_ag_max_usable; /* max space per AG */
171 int m_dalign; /* stripe unit */
172 int m_swidth; /* stripe width */
173 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
174 uint m_allocsize_log;/* min write size log bytes */
175 uint m_allocsize_blocks; /* min write size blocks */
176 int m_logbufs; /* number of log buffers */
177 int m_logbsize; /* size of each log buffer */
178 unsigned int m_rsumlevels; /* rt summary levels */
179 xfs_filblks_t m_rsumblocks; /* size of rt summary, FSBs */
180 int m_fixedfsid[2]; /* unchanged for life of FS */
181 uint m_qflags; /* quota status flags */
182 uint64_t m_features; /* active filesystem features */
183 uint64_t m_low_space[XFS_LOWSP_MAX];
184 uint64_t m_low_rtexts[XFS_LOWSP_MAX];
185 uint64_t m_rtxblkmask; /* rt extent block mask */
186 struct xfs_ino_geometry m_ino_geo; /* inode geometry */
187 struct xfs_trans_resv m_resv; /* precomputed res values */
188 /* low free space thresholds */
189 unsigned long m_opstate; /* dynamic state flags */
190 bool m_always_cow;
191 bool m_fail_unmount;
192 bool m_finobt_nores; /* no per-AG finobt resv. */
193 bool m_update_sb; /* sb needs update in mount */
194
195 /*
196 * Bitsets of per-fs metadata that have been checked and/or are sick.
197 * Callers must hold m_sb_lock to access these two fields.
198 */
199 uint8_t m_fs_checked;
200 uint8_t m_fs_sick;
201 /*
202 * Bitsets of rt metadata that have been checked and/or are sick.
203 * Callers must hold m_sb_lock to access this field.
204 */
205 uint8_t m_rt_checked;
206 uint8_t m_rt_sick;
207
208 /*
209 * End of read-mostly variables. Frequently written variables and locks
210 * should be placed below this comment from now on. The first variable
211 * here is marked as cacheline aligned so they it is separated from
212 * the read-mostly variables.
213 */
214
215 spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
216 struct percpu_counter m_icount; /* allocated inodes counter */
217 struct percpu_counter m_ifree; /* free inodes counter */
218 struct percpu_counter m_fdblocks; /* free block counter */
219 struct percpu_counter m_frextents; /* free rt extent counter */
220
221 /*
222 * Count of data device blocks reserved for delayed allocations,
223 * including indlen blocks. Does not include allocated CoW staging
224 * extents or anything related to the rt device.
225 */
226 struct percpu_counter m_delalloc_blks;
227
228 /*
229 * RT version of the above.
230 */
231 struct percpu_counter m_delalloc_rtextents;
232
233 /*
234 * Global count of allocation btree blocks in use across all AGs. Only
235 * used when perag reservation is enabled. Helps prevent block
236 * reservation from attempting to reserve allocation btree blocks.
237 */
238 atomic64_t m_allocbt_blks;
239
240 struct xfs_groups m_groups[XG_TYPE_MAX];
241 uint64_t m_resblks; /* total reserved blocks */
242 uint64_t m_resblks_avail;/* available reserved blocks */
243 uint64_t m_resblks_save; /* reserved blks @ remount,ro */
244 struct delayed_work m_reclaim_work; /* background inode reclaim */
245 struct dentry *m_debugfs; /* debugfs parent */
246 struct xfs_kobj m_kobj;
247 struct xfs_kobj m_error_kobj;
248 struct xfs_kobj m_error_meta_kobj;
249 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
250 struct xstats m_stats; /* per-fs stats */
251#ifdef CONFIG_XFS_ONLINE_SCRUB_STATS
252 struct xchk_stats *m_scrub_stats;
253#endif
254 xfs_agnumber_t m_agfrotor; /* last ag where space found */
255 atomic_t m_agirotor; /* last ag dir inode alloced */
256 atomic_t m_rtgrotor; /* last rtgroup rtpicked */
257
258 /* Memory shrinker to throttle and reprioritize inodegc */
259 struct shrinker *m_inodegc_shrinker;
260 /*
261 * Workqueue item so that we can coalesce multiple inode flush attempts
262 * into a single flush.
263 */
264 struct work_struct m_flush_inodes_work;
265
266 /*
267 * Generation of the filesysyem layout. This is incremented by each
268 * growfs, and used by the pNFS server to ensure the client updates
269 * its view of the block device once it gets a layout that might
270 * reference the newly added blocks. Does not need to be persistent
271 * as long as we only allow file system size increments, but if we
272 * ever support shrinks it would have to be persisted in addition
273 * to various other kinds of pain inflicted on the pNFS server.
274 */
275 uint32_t m_generation;
276 struct mutex m_growlock; /* growfs mutex */
277
278#ifdef DEBUG
279 /*
280 * Frequency with which errors are injected. Replaces xfs_etest; the
281 * value stored in here is the inverse of the frequency with which the
282 * error triggers. 1 = always, 2 = half the time, etc.
283 */
284 unsigned int *m_errortag;
285 struct xfs_kobj m_errortag_kobj;
286#endif
287
288 /* cpus that have inodes queued for inactivation */
289 struct cpumask m_inodegc_cpumask;
290
291 /* Hook to feed dirent updates to an active online repair. */
292 struct xfs_hooks m_dir_update_hooks;
293} xfs_mount_t;
294
295#define M_IGEO(mp) (&(mp)->m_ino_geo)
296
297/*
298 * Flags for m_features.
299 *
300 * These are all the active features in the filesystem, regardless of how
301 * they are configured.
302 */
303#define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */
304#define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */
305#define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */
306#define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */
307#define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */
308#define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */
309#define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */
310#define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */
311#define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */
312#define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */
313#define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */
314#define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */
315#define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */
316#define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */
317#define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */
318#define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */
319#define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */
320#define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */
321#define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */
322#define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */
323#define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */
324#define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */
325#define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */
326#define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */
327#define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */
328#define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */
329#define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */
330#define XFS_FEAT_EXCHANGE_RANGE (1ULL << 27) /* exchange range */
331#define XFS_FEAT_METADIR (1ULL << 28) /* metadata directory tree */
332
333/* Mount features */
334#define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */
335#define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */
336#define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */
337#define XFS_FEAT_LARGE_IOSIZE (1ULL << 51) /* report large preferred
338 * I/O size in stat() */
339#define XFS_FEAT_WSYNC (1ULL << 52) /* synchronous metadata ops */
340#define XFS_FEAT_DIRSYNC (1ULL << 53) /* synchronous directory ops */
341#define XFS_FEAT_DISCARD (1ULL << 54) /* discard unused blocks */
342#define XFS_FEAT_GRPID (1ULL << 55) /* group-ID assigned from directory */
343#define XFS_FEAT_SMALL_INUMS (1ULL << 56) /* user wants 32bit inodes */
344#define XFS_FEAT_IKEEP (1ULL << 57) /* keep empty inode clusters*/
345#define XFS_FEAT_SWALLOC (1ULL << 58) /* stripe width allocation */
346#define XFS_FEAT_FILESTREAMS (1ULL << 59) /* use filestreams allocator */
347#define XFS_FEAT_DAX_ALWAYS (1ULL << 60) /* DAX always enabled */
348#define XFS_FEAT_DAX_NEVER (1ULL << 61) /* DAX never enabled */
349#define XFS_FEAT_NORECOVERY (1ULL << 62) /* no recovery - dirty fs */
350#define XFS_FEAT_NOUUID (1ULL << 63) /* ignore uuid during mount */
351
352#define __XFS_HAS_FEAT(name, NAME) \
353static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
354{ \
355 return mp->m_features & XFS_FEAT_ ## NAME; \
356}
357
358/* Some features can be added dynamically so they need a set wrapper, too. */
359#define __XFS_ADD_FEAT(name, NAME) \
360 __XFS_HAS_FEAT(name, NAME); \
361static inline void xfs_add_ ## name (struct xfs_mount *mp) \
362{ \
363 mp->m_features |= XFS_FEAT_ ## NAME; \
364 xfs_sb_version_add ## name(&mp->m_sb); \
365}
366
367/* Superblock features */
368__XFS_ADD_FEAT(attr, ATTR)
369__XFS_HAS_FEAT(nlink, NLINK)
370__XFS_ADD_FEAT(quota, QUOTA)
371__XFS_HAS_FEAT(dalign, DALIGN)
372__XFS_HAS_FEAT(sector, SECTOR)
373__XFS_HAS_FEAT(asciici, ASCIICI)
374__XFS_HAS_FEAT(parent, PARENT)
375__XFS_HAS_FEAT(ftype, FTYPE)
376__XFS_HAS_FEAT(finobt, FINOBT)
377__XFS_HAS_FEAT(rmapbt, RMAPBT)
378__XFS_HAS_FEAT(reflink, REFLINK)
379__XFS_HAS_FEAT(sparseinodes, SPINODES)
380__XFS_HAS_FEAT(metauuid, META_UUID)
381__XFS_HAS_FEAT(realtime, REALTIME)
382__XFS_HAS_FEAT(inobtcounts, INOBTCNT)
383__XFS_HAS_FEAT(bigtime, BIGTIME)
384__XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
385__XFS_HAS_FEAT(large_extent_counts, NREXT64)
386__XFS_HAS_FEAT(exchange_range, EXCHANGE_RANGE)
387__XFS_HAS_FEAT(metadir, METADIR)
388
389static inline bool xfs_has_rtgroups(struct xfs_mount *mp)
390{
391 /* all metadir file systems also allow rtgroups */
392 return xfs_has_metadir(mp);
393}
394
395static inline bool xfs_has_rtsb(struct xfs_mount *mp)
396{
397 /* all rtgroups filesystems with an rt section have an rtsb */
398 return xfs_has_rtgroups(mp) && xfs_has_realtime(mp);
399}
400
401/*
402 * Some features are always on for v5 file systems, allow the compiler to
403 * eliminiate dead code when building without v4 support.
404 */
405#define __XFS_HAS_V4_FEAT(name, NAME) \
406static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
407{ \
408 return !IS_ENABLED(CONFIG_XFS_SUPPORT_V4) || \
409 (mp->m_features & XFS_FEAT_ ## NAME); \
410}
411
412#define __XFS_ADD_V4_FEAT(name, NAME) \
413 __XFS_HAS_V4_FEAT(name, NAME); \
414static inline void xfs_add_ ## name (struct xfs_mount *mp) \
415{ \
416 if (IS_ENABLED(CONFIG_XFS_SUPPORT_V4)) { \
417 mp->m_features |= XFS_FEAT_ ## NAME; \
418 xfs_sb_version_add ## name(&mp->m_sb); \
419 } \
420}
421
422__XFS_HAS_V4_FEAT(align, ALIGN)
423__XFS_HAS_V4_FEAT(logv2, LOGV2)
424__XFS_HAS_V4_FEAT(extflg, EXTFLG)
425__XFS_HAS_V4_FEAT(lazysbcount, LAZYSBCOUNT)
426__XFS_ADD_V4_FEAT(attr2, ATTR2)
427__XFS_ADD_V4_FEAT(projid32, PROJID32)
428__XFS_HAS_V4_FEAT(v3inodes, V3INODES)
429__XFS_HAS_V4_FEAT(crc, CRC)
430__XFS_HAS_V4_FEAT(pquotino, PQUOTINO)
431
432/*
433 * Mount features
434 *
435 * These do not change dynamically - features that can come and go, such as 32
436 * bit inodes and read-only state, are kept as operational state rather than
437 * features.
438 */
439__XFS_HAS_FEAT(noattr2, NOATTR2)
440__XFS_HAS_FEAT(noalign, NOALIGN)
441__XFS_HAS_FEAT(allocsize, ALLOCSIZE)
442__XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE)
443__XFS_HAS_FEAT(wsync, WSYNC)
444__XFS_HAS_FEAT(dirsync, DIRSYNC)
445__XFS_HAS_FEAT(discard, DISCARD)
446__XFS_HAS_FEAT(grpid, GRPID)
447__XFS_HAS_FEAT(small_inums, SMALL_INUMS)
448__XFS_HAS_FEAT(ikeep, IKEEP)
449__XFS_HAS_FEAT(swalloc, SWALLOC)
450__XFS_HAS_FEAT(filestreams, FILESTREAMS)
451__XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
452__XFS_HAS_FEAT(dax_never, DAX_NEVER)
453__XFS_HAS_FEAT(norecovery, NORECOVERY)
454__XFS_HAS_FEAT(nouuid, NOUUID)
455
456/*
457 * Operational mount state flags
458 *
459 * Use these with atomic bit ops only!
460 */
461#define XFS_OPSTATE_UNMOUNTING 0 /* filesystem is unmounting */
462#define XFS_OPSTATE_CLEAN 1 /* mount was clean */
463#define XFS_OPSTATE_SHUTDOWN 2 /* stop all fs operations */
464#define XFS_OPSTATE_INODE32 3 /* inode32 allocator active */
465#define XFS_OPSTATE_READONLY 4 /* read-only fs */
466
467/*
468 * If set, inactivation worker threads will be scheduled to process queued
469 * inodegc work. If not, queued inodes remain in memory waiting to be
470 * processed.
471 */
472#define XFS_OPSTATE_INODEGC_ENABLED 5
473/*
474 * If set, background speculative prealloc gc worker threads will be scheduled
475 * to process queued blockgc work. If not, inodes retain their preallocations
476 * until explicitly deleted.
477 */
478#define XFS_OPSTATE_BLOCKGC_ENABLED 6
479
480/* Kernel has logged a warning about pNFS being used on this fs. */
481#define XFS_OPSTATE_WARNED_PNFS 7
482/* Kernel has logged a warning about online fsck being used on this fs. */
483#define XFS_OPSTATE_WARNED_SCRUB 8
484/* Kernel has logged a warning about shrink being used on this fs. */
485#define XFS_OPSTATE_WARNED_SHRINK 9
486/* Kernel has logged a warning about logged xattr updates being used. */
487#define XFS_OPSTATE_WARNED_LARP 10
488/* Mount time quotacheck is running */
489#define XFS_OPSTATE_QUOTACHECK_RUNNING 11
490/* Do we want to clear log incompat flags? */
491#define XFS_OPSTATE_UNSET_LOG_INCOMPAT 12
492/* Filesystem can use logged extended attributes */
493#define XFS_OPSTATE_USE_LARP 13
494/* Kernel has logged a warning about blocksize > pagesize on this fs. */
495#define XFS_OPSTATE_WARNED_LBS 14
496/* Kernel has logged a warning about exchange-range being used on this fs. */
497#define XFS_OPSTATE_WARNED_EXCHRANGE 15
498/* Kernel has logged a warning about parent pointers being used on this fs. */
499#define XFS_OPSTATE_WARNED_PPTR 16
500/* Kernel has logged a warning about metadata dirs being used on this fs. */
501#define XFS_OPSTATE_WARNED_METADIR 17
502/* Filesystem should use qflags to determine quotaon status */
503#define XFS_OPSTATE_RESUMING_QUOTAON 18
504
505#define __XFS_IS_OPSTATE(name, NAME) \
506static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
507{ \
508 return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
509} \
510static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
511{ \
512 return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
513} \
514static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
515{ \
516 return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
517}
518
519__XFS_IS_OPSTATE(unmounting, UNMOUNTING)
520__XFS_IS_OPSTATE(clean, CLEAN)
521__XFS_IS_OPSTATE(shutdown, SHUTDOWN)
522__XFS_IS_OPSTATE(inode32, INODE32)
523__XFS_IS_OPSTATE(readonly, READONLY)
524__XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
525__XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED)
526#ifdef CONFIG_XFS_QUOTA
527__XFS_IS_OPSTATE(quotacheck_running, QUOTACHECK_RUNNING)
528__XFS_IS_OPSTATE(resuming_quotaon, RESUMING_QUOTAON)
529#else
530static inline bool xfs_is_quotacheck_running(struct xfs_mount *mp)
531{
532 return false;
533}
534static inline bool xfs_is_resuming_quotaon(struct xfs_mount *mp)
535{
536 return false;
537}
538static inline void xfs_set_resuming_quotaon(struct xfs_mount *m)
539{
540}
541static inline bool xfs_clear_resuming_quotaon(struct xfs_mount *mp)
542{
543 return false;
544}
545#endif /* CONFIG_XFS_QUOTA */
546__XFS_IS_OPSTATE(done_with_log_incompat, UNSET_LOG_INCOMPAT)
547__XFS_IS_OPSTATE(using_logged_xattrs, USE_LARP)
548
549static inline bool
550xfs_should_warn(struct xfs_mount *mp, long nr)
551{
552 return !test_and_set_bit(nr, &mp->m_opstate);
553}
554
555#define XFS_OPSTATE_STRINGS \
556 { (1UL << XFS_OPSTATE_UNMOUNTING), "unmounting" }, \
557 { (1UL << XFS_OPSTATE_CLEAN), "clean" }, \
558 { (1UL << XFS_OPSTATE_SHUTDOWN), "shutdown" }, \
559 { (1UL << XFS_OPSTATE_INODE32), "inode32" }, \
560 { (1UL << XFS_OPSTATE_READONLY), "read_only" }, \
561 { (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }, \
562 { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED), "blockgc" }, \
563 { (1UL << XFS_OPSTATE_WARNED_SCRUB), "wscrub" }, \
564 { (1UL << XFS_OPSTATE_WARNED_SHRINK), "wshrink" }, \
565 { (1UL << XFS_OPSTATE_WARNED_LARP), "wlarp" }, \
566 { (1UL << XFS_OPSTATE_QUOTACHECK_RUNNING), "quotacheck" }, \
567 { (1UL << XFS_OPSTATE_UNSET_LOG_INCOMPAT), "unset_log_incompat" }, \
568 { (1UL << XFS_OPSTATE_USE_LARP), "logged_xattrs" }
569
570/*
571 * Max and min values for mount-option defined I/O
572 * preallocation sizes.
573 */
574#define XFS_MAX_IO_LOG 30 /* 1G */
575#define XFS_MIN_IO_LOG PAGE_SHIFT
576
577void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
578 int lnnum);
579#define xfs_force_shutdown(m,f) \
580 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
581
582#define SHUTDOWN_META_IO_ERROR (1u << 0) /* write attempt to metadata failed */
583#define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */
584#define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */
585#define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */
586#define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */
587#define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */
588
589#define XFS_SHUTDOWN_STRINGS \
590 { SHUTDOWN_META_IO_ERROR, "metadata_io" }, \
591 { SHUTDOWN_LOG_IO_ERROR, "log_io" }, \
592 { SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \
593 { SHUTDOWN_CORRUPT_INCORE, "corruption" }, \
594 { SHUTDOWN_DEVICE_REMOVED, "device_removed" }
595
596/*
597 * Flags for xfs_mountfs
598 */
599#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
600
601static inline xfs_agnumber_t
602xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
603{
604 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
605 do_div(ld, mp->m_sb.sb_agblocks);
606 return (xfs_agnumber_t) ld;
607}
608
609static inline xfs_agblock_t
610xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
611{
612 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
613 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
614}
615
616extern void xfs_uuid_table_free(void);
617extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
618extern int xfs_mountfs(xfs_mount_t *mp);
619extern void xfs_unmountfs(xfs_mount_t *);
620
621/*
622 * Deltas for the block count can vary from 1 to very large, but lock contention
623 * only occurs on frequent small block count updates such as in the delayed
624 * allocation path for buffered writes (page a time updates). Hence we set
625 * a large batch count (1024) to minimise global counter updates except when
626 * we get near to ENOSPC and we have to be very accurate with our updates.
627 */
628#define XFS_FDBLOCKS_BATCH 1024
629
630/*
631 * Estimate the amount of free space that is not available to userspace and is
632 * not explicitly reserved from the incore fdblocks. This includes:
633 *
634 * - The minimum number of blocks needed to support splitting a bmap btree
635 * - The blocks currently in use by the freespace btrees because they record
636 * the actual blocks that will fill per-AG metadata space reservations
637 */
638static inline uint64_t
639xfs_fdblocks_unavailable(
640 struct xfs_mount *mp)
641{
642 return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);
643}
644
645int xfs_dec_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
646 uint64_t delta, bool rsvd);
647void xfs_add_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
648 uint64_t delta);
649
650static inline int xfs_dec_fdblocks(struct xfs_mount *mp, uint64_t delta,
651 bool reserved)
652{
653 return xfs_dec_freecounter(mp, &mp->m_fdblocks, delta, reserved);
654}
655
656static inline void xfs_add_fdblocks(struct xfs_mount *mp, uint64_t delta)
657{
658 xfs_add_freecounter(mp, &mp->m_fdblocks, delta);
659}
660
661static inline int xfs_dec_frextents(struct xfs_mount *mp, uint64_t delta)
662{
663 return xfs_dec_freecounter(mp, &mp->m_frextents, delta, false);
664}
665
666static inline void xfs_add_frextents(struct xfs_mount *mp, uint64_t delta)
667{
668 xfs_add_freecounter(mp, &mp->m_frextents, delta);
669}
670
671extern int xfs_readsb(xfs_mount_t *, int);
672extern void xfs_freesb(xfs_mount_t *);
673extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
674extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
675
676extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
677
678extern void xfs_set_low_space_thresholds(struct xfs_mount *);
679
680int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
681 xfs_off_t count_fsb);
682
683struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
684 int error_class, int error);
685void xfs_force_summary_recalc(struct xfs_mount *mp);
686int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
687bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
688void xfs_mod_delalloc(struct xfs_inode *ip, int64_t data_delta,
689 int64_t ind_delta);
690
691#endif /* __XFS_MOUNT_H__ */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#ifndef __XFS_MOUNT_H__
7#define __XFS_MOUNT_H__
8
9struct xlog;
10struct xfs_inode;
11struct xfs_mru_cache;
12struct xfs_ail;
13struct xfs_quotainfo;
14struct xfs_da_geometry;
15struct xfs_perag;
16
17/* dynamic preallocation free space thresholds, 5% down to 1% */
18enum {
19 XFS_LOWSP_1_PCNT = 0,
20 XFS_LOWSP_2_PCNT,
21 XFS_LOWSP_3_PCNT,
22 XFS_LOWSP_4_PCNT,
23 XFS_LOWSP_5_PCNT,
24 XFS_LOWSP_MAX,
25};
26
27/*
28 * Error Configuration
29 *
30 * Error classes define the subsystem the configuration belongs to.
31 * Error numbers define the errors that are configurable.
32 */
33enum {
34 XFS_ERR_METADATA,
35 XFS_ERR_CLASS_MAX,
36};
37enum {
38 XFS_ERR_DEFAULT,
39 XFS_ERR_EIO,
40 XFS_ERR_ENOSPC,
41 XFS_ERR_ENODEV,
42 XFS_ERR_ERRNO_MAX,
43};
44
45#define XFS_ERR_RETRY_FOREVER -1
46
47/*
48 * Although retry_timeout is in jiffies which is normally an unsigned long,
49 * we limit the retry timeout to 86400 seconds, or one day. So even a
50 * signed 32-bit long is sufficient for a HZ value up to 24855. Making it
51 * signed lets us store the special "-1" value, meaning retry forever.
52 */
53struct xfs_error_cfg {
54 struct xfs_kobj kobj;
55 int max_retries;
56 long retry_timeout; /* in jiffies, -1 = infinite */
57};
58
59/*
60 * The struct xfsmount layout is optimised to separate read-mostly variables
61 * from variables that are frequently modified. We put the read-mostly variables
62 * first, then place all the other variables at the end.
63 *
64 * Typically, read-mostly variables are those that are set at mount time and
65 * never changed again, or only change rarely as a result of things like sysfs
66 * knobs being tweaked.
67 */
68typedef struct xfs_mount {
69 struct xfs_sb m_sb; /* copy of fs superblock */
70 struct super_block *m_super;
71 struct xfs_ail *m_ail; /* fs active log item list */
72 struct xfs_buf *m_sb_bp; /* buffer for superblock */
73 char *m_rtname; /* realtime device name */
74 char *m_logname; /* external log device name */
75 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
76 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
77 struct xlog *m_log; /* log specific stuff */
78 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
79 struct xfs_inode *m_rsumip; /* pointer to summary inode */
80 struct xfs_inode *m_rootip; /* pointer to root directory */
81 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
82 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
83 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
84 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
85 /*
86 * Optional cache of rt summary level per bitmap block with the
87 * invariant that m_rsum_cache[bbno] <= the minimum i for which
88 * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
89 * inode lock.
90 */
91 uint8_t *m_rsum_cache;
92 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
93 struct workqueue_struct *m_buf_workqueue;
94 struct workqueue_struct *m_unwritten_workqueue;
95 struct workqueue_struct *m_cil_workqueue;
96 struct workqueue_struct *m_reclaim_workqueue;
97 struct workqueue_struct *m_gc_workqueue;
98 struct workqueue_struct *m_sync_workqueue;
99
100 int m_bsize; /* fs logical block size */
101 uint8_t m_blkbit_log; /* blocklog + NBBY */
102 uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
103 uint8_t m_agno_log; /* log #ag's */
104 uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
105 uint m_blockmask; /* sb_blocksize-1 */
106 uint m_blockwsize; /* sb_blocksize in words */
107 uint m_blockwmask; /* blockwsize-1 */
108 uint m_alloc_mxr[2]; /* max alloc btree records */
109 uint m_alloc_mnr[2]; /* min alloc btree records */
110 uint m_bmap_dmxr[2]; /* max bmap btree records */
111 uint m_bmap_dmnr[2]; /* min bmap btree records */
112 uint m_rmap_mxr[2]; /* max rmap btree records */
113 uint m_rmap_mnr[2]; /* min rmap btree records */
114 uint m_refc_mxr[2]; /* max refc btree records */
115 uint m_refc_mnr[2]; /* min refc btree records */
116 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
117 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
118 uint m_rmap_maxlevels; /* max rmap btree levels */
119 uint m_refc_maxlevels; /* max refcount btree level */
120 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
121 uint m_alloc_set_aside; /* space we can't use */
122 uint m_ag_max_usable; /* max space per AG */
123 int m_dalign; /* stripe unit */
124 int m_swidth; /* stripe width */
125 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
126 uint m_allocsize_log;/* min write size log bytes */
127 uint m_allocsize_blocks; /* min write size blocks */
128 int m_logbufs; /* number of log buffers */
129 int m_logbsize; /* size of each log buffer */
130 uint m_rsumlevels; /* rt summary levels */
131 uint m_rsumsize; /* size of rt summary, bytes */
132 int m_fixedfsid[2]; /* unchanged for life of FS */
133 uint m_qflags; /* quota status flags */
134 uint64_t m_flags; /* global mount flags */
135 int64_t m_low_space[XFS_LOWSP_MAX];
136 struct xfs_ino_geometry m_ino_geo; /* inode geometry */
137 struct xfs_trans_resv m_resv; /* precomputed res values */
138 /* low free space thresholds */
139 bool m_always_cow;
140 bool m_fail_unmount;
141 bool m_finobt_nores; /* no per-AG finobt resv. */
142 bool m_update_sb; /* sb needs update in mount */
143
144 /*
145 * Bitsets of per-fs metadata that have been checked and/or are sick.
146 * Callers must hold m_sb_lock to access these two fields.
147 */
148 uint8_t m_fs_checked;
149 uint8_t m_fs_sick;
150 /*
151 * Bitsets of rt metadata that have been checked and/or are sick.
152 * Callers must hold m_sb_lock to access this field.
153 */
154 uint8_t m_rt_checked;
155 uint8_t m_rt_sick;
156
157 /*
158 * End of read-mostly variables. Frequently written variables and locks
159 * should be placed below this comment from now on. The first variable
160 * here is marked as cacheline aligned so they it is separated from
161 * the read-mostly variables.
162 */
163
164 spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
165 struct percpu_counter m_icount; /* allocated inodes counter */
166 struct percpu_counter m_ifree; /* free inodes counter */
167 struct percpu_counter m_fdblocks; /* free block counter */
168 /*
169 * Count of data device blocks reserved for delayed allocations,
170 * including indlen blocks. Does not include allocated CoW staging
171 * extents or anything related to the rt device.
172 */
173 struct percpu_counter m_delalloc_blks;
174 /*
175 * Global count of allocation btree blocks in use across all AGs. Only
176 * used when perag reservation is enabled. Helps prevent block
177 * reservation from attempting to reserve allocation btree blocks.
178 */
179 atomic64_t m_allocbt_blks;
180
181 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
182 spinlock_t m_perag_lock; /* lock for m_perag_tree */
183 uint64_t m_resblks; /* total reserved blocks */
184 uint64_t m_resblks_avail;/* available reserved blocks */
185 uint64_t m_resblks_save; /* reserved blks @ remount,ro */
186 struct delayed_work m_reclaim_work; /* background inode reclaim */
187 struct xfs_kobj m_kobj;
188 struct xfs_kobj m_error_kobj;
189 struct xfs_kobj m_error_meta_kobj;
190 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
191 struct xstats m_stats; /* per-fs stats */
192 xfs_agnumber_t m_agfrotor; /* last ag where space found */
193 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
194 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
195
196 /*
197 * Workqueue item so that we can coalesce multiple inode flush attempts
198 * into a single flush.
199 */
200 struct work_struct m_flush_inodes_work;
201
202 /*
203 * Generation of the filesysyem layout. This is incremented by each
204 * growfs, and used by the pNFS server to ensure the client updates
205 * its view of the block device once it gets a layout that might
206 * reference the newly added blocks. Does not need to be persistent
207 * as long as we only allow file system size increments, but if we
208 * ever support shrinks it would have to be persisted in addition
209 * to various other kinds of pain inflicted on the pNFS server.
210 */
211 uint32_t m_generation;
212 struct mutex m_growlock; /* growfs mutex */
213
214#ifdef DEBUG
215 /*
216 * Frequency with which errors are injected. Replaces xfs_etest; the
217 * value stored in here is the inverse of the frequency with which the
218 * error triggers. 1 = always, 2 = half the time, etc.
219 */
220 unsigned int *m_errortag;
221 struct xfs_kobj m_errortag_kobj;
222#endif
223} xfs_mount_t;
224
225#define M_IGEO(mp) (&(mp)->m_ino_geo)
226
227/*
228 * Flags for m_flags.
229 */
230#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
231 must be synchronous except
232 for space allocations */
233#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */
234#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
235#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
236 operations, typically for
237 disk errors in metadata */
238#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
239#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
240 allocations */
241#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
242#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
243#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
244#define XFS_MOUNT_ALLOCSIZE (1ULL << 12) /* specified allocation size */
245#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */
246#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */
247#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
248#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
249#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
250 * allocation */
251#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
252#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
253#define XFS_MOUNT_LARGEIO (1ULL << 22) /* report large preferred
254 * I/O size in stat() */
255#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
256 allocator */
257#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
258#define XFS_MOUNT_DAX_ALWAYS (1ULL << 26)
259#define XFS_MOUNT_DAX_NEVER (1ULL << 27)
260
261/*
262 * Max and min values for mount-option defined I/O
263 * preallocation sizes.
264 */
265#define XFS_MAX_IO_LOG 30 /* 1G */
266#define XFS_MIN_IO_LOG PAGE_SHIFT
267
268#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
269 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
270#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
271void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
272 int lnnum);
273#define xfs_force_shutdown(m,f) \
274 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
275
276#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
277#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
278#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
279#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
280
281/*
282 * Flags for xfs_mountfs
283 */
284#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
285
286static inline xfs_agnumber_t
287xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
288{
289 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
290 do_div(ld, mp->m_sb.sb_agblocks);
291 return (xfs_agnumber_t) ld;
292}
293
294static inline xfs_agblock_t
295xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
296{
297 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
298 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
299}
300
301int xfs_buf_hash_init(struct xfs_perag *pag);
302void xfs_buf_hash_destroy(struct xfs_perag *pag);
303
304extern void xfs_uuid_table_free(void);
305extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
306extern int xfs_mountfs(xfs_mount_t *mp);
307extern void xfs_unmountfs(xfs_mount_t *);
308
309extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
310 bool reserved);
311extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
312
313extern int xfs_readsb(xfs_mount_t *, int);
314extern void xfs_freesb(xfs_mount_t *);
315extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
316extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
317
318extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
319
320extern void xfs_set_low_space_thresholds(struct xfs_mount *);
321
322int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
323 xfs_off_t count_fsb);
324
325struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
326 int error_class, int error);
327void xfs_force_summary_recalc(struct xfs_mount *mp);
328void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
329
330#endif /* __XFS_MOUNT_H__ */