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