Line data Source code
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 llist_head list;
64 : struct delayed_work work;
65 : int error;
66 :
67 : /* approximate count of inodes in the list */
68 : unsigned int items;
69 : unsigned int shrinker_hits;
70 : #if defined(DEBUG) || defined(XFS_WARN)
71 : unsigned int cpu;
72 : #endif
73 : };
74 :
75 : /*
76 : * The struct xfsmount layout is optimised to separate read-mostly variables
77 : * from variables that are frequently modified. We put the read-mostly variables
78 : * first, then place all the other variables at the end.
79 : *
80 : * Typically, read-mostly variables are those that are set at mount time and
81 : * never changed again, or only change rarely as a result of things like sysfs
82 : * knobs being tweaked.
83 : */
84 : typedef struct xfs_mount {
85 : struct xfs_sb m_sb; /* copy of fs superblock */
86 : struct super_block *m_super;
87 : struct xfs_ail *m_ail; /* fs active log item list */
88 : struct xfs_buf *m_sb_bp; /* buffer for superblock */
89 : char *m_rtname; /* realtime device name */
90 : char *m_logname; /* external log device name */
91 : struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
92 : struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
93 : struct xlog *m_log; /* log specific stuff */
94 : struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
95 : struct xfs_inode *m_rsumip; /* pointer to summary inode */
96 : struct xfs_inode *m_rootip; /* pointer to root directory */
97 : struct xfs_quotainfo *m_quotainfo; /* disk quota information */
98 : xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
99 : xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
100 : xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
101 : struct list_head m_mount_list; /* global mount list */
102 : void __percpu *m_inodegc; /* percpu inodegc structures */
103 :
104 : /*
105 : * Optional cache of rt summary level per bitmap block with the
106 : * invariant that m_rsum_cache[bbno] <= the minimum i for which
107 : * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
108 : * inode lock.
109 : */
110 : uint8_t *m_rsum_cache;
111 : struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
112 : struct workqueue_struct *m_buf_workqueue;
113 : struct workqueue_struct *m_unwritten_workqueue;
114 : struct workqueue_struct *m_reclaim_workqueue;
115 : struct workqueue_struct *m_sync_workqueue;
116 : struct workqueue_struct *m_blockgc_wq;
117 : struct workqueue_struct *m_inodegc_wq;
118 :
119 : int m_bsize; /* fs logical block size */
120 : uint8_t m_blkbit_log; /* blocklog + NBBY */
121 : uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
122 : uint8_t m_agno_log; /* log #ag's */
123 : uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
124 : uint m_blockmask; /* sb_blocksize-1 */
125 : uint m_blockwsize; /* sb_blocksize in words */
126 : uint m_blockwmask; /* blockwsize-1 */
127 : uint m_alloc_mxr[2]; /* max alloc btree records */
128 : uint m_alloc_mnr[2]; /* min alloc btree records */
129 : uint m_bmap_dmxr[2]; /* max bmap btree records */
130 : uint m_bmap_dmnr[2]; /* min bmap btree records */
131 : uint m_rmap_mxr[2]; /* max rmap btree records */
132 : uint m_rmap_mnr[2]; /* min rmap btree records */
133 : uint m_refc_mxr[2]; /* max refc btree records */
134 : uint m_refc_mnr[2]; /* min refc btree records */
135 : uint m_alloc_maxlevels; /* max alloc btree levels */
136 : uint m_bm_maxlevels[2]; /* max bmap btree levels */
137 : uint m_rmap_maxlevels; /* max rmap btree levels */
138 : uint m_refc_maxlevels; /* max refcount btree level */
139 : unsigned int m_agbtree_maxlevels; /* max level of all AG btrees */
140 : xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
141 : uint m_alloc_set_aside; /* space we can't use */
142 : uint m_ag_max_usable; /* max space per AG */
143 : int m_dalign; /* stripe unit */
144 : int m_swidth; /* stripe width */
145 : xfs_agnumber_t m_maxagi; /* highest inode alloc group */
146 : uint m_allocsize_log;/* min write size log bytes */
147 : uint m_allocsize_blocks; /* min write size blocks */
148 : int m_logbufs; /* number of log buffers */
149 : int m_logbsize; /* size of each log buffer */
150 : uint m_rsumlevels; /* rt summary levels */
151 : uint m_rsumsize; /* size of rt summary, bytes */
152 : int m_fixedfsid[2]; /* unchanged for life of FS */
153 : uint m_qflags; /* quota status flags */
154 : uint64_t m_features; /* active filesystem features */
155 : uint64_t m_low_space[XFS_LOWSP_MAX];
156 : uint64_t m_low_rtexts[XFS_LOWSP_MAX];
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 : * Global count of allocation btree blocks in use across all AGs. Only
200 : * used when perag reservation is enabled. Helps prevent block
201 : * reservation from attempting to reserve allocation btree blocks.
202 : */
203 : atomic64_t m_allocbt_blks;
204 :
205 : struct radix_tree_root m_perag_tree; /* per-ag accounting info */
206 : spinlock_t m_perag_lock; /* lock for m_perag_tree */
207 : uint64_t m_resblks; /* total reserved blocks */
208 : uint64_t m_resblks_avail;/* available reserved blocks */
209 : uint64_t m_resblks_save; /* reserved blks @ remount,ro */
210 : struct delayed_work m_reclaim_work; /* background inode reclaim */
211 : struct xfs_kobj m_kobj;
212 : struct xfs_kobj m_error_kobj;
213 : struct xfs_kobj m_error_meta_kobj;
214 : struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
215 : struct xstats m_stats; /* per-fs stats */
216 : xfs_agnumber_t m_agfrotor; /* last ag where space found */
217 : atomic_t m_agirotor; /* last ag dir inode alloced */
218 :
219 : /* Memory shrinker to throttle and reprioritize inodegc */
220 : struct shrinker m_inodegc_shrinker;
221 : /*
222 : * Workqueue item so that we can coalesce multiple inode flush attempts
223 : * into a single flush.
224 : */
225 : struct work_struct m_flush_inodes_work;
226 :
227 : /*
228 : * Generation of the filesysyem layout. This is incremented by each
229 : * growfs, and used by the pNFS server to ensure the client updates
230 : * its view of the block device once it gets a layout that might
231 : * reference the newly added blocks. Does not need to be persistent
232 : * as long as we only allow file system size increments, but if we
233 : * ever support shrinks it would have to be persisted in addition
234 : * to various other kinds of pain inflicted on the pNFS server.
235 : */
236 : uint32_t m_generation;
237 : struct mutex m_growlock; /* growfs mutex */
238 :
239 : #ifdef DEBUG
240 : /*
241 : * Frequency with which errors are injected. Replaces xfs_etest; the
242 : * value stored in here is the inverse of the frequency with which the
243 : * error triggers. 1 = always, 2 = half the time, etc.
244 : */
245 : unsigned int *m_errortag;
246 : struct xfs_kobj m_errortag_kobj;
247 : #endif
248 : } xfs_mount_t;
249 :
250 : #define M_IGEO(mp) (&(mp)->m_ino_geo)
251 :
252 : /*
253 : * Flags for m_features.
254 : *
255 : * These are all the active features in the filesystem, regardless of how
256 : * they are configured.
257 : */
258 : #define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */
259 : #define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */
260 : #define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */
261 : #define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */
262 : #define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */
263 : #define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */
264 : #define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */
265 : #define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */
266 : #define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */
267 : #define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */
268 : #define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */
269 : #define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */
270 : #define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */
271 : #define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */
272 : #define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */
273 : #define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */
274 : #define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */
275 : #define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */
276 : #define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */
277 : #define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */
278 : #define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */
279 : #define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */
280 : #define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */
281 : #define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */
282 : #define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */
283 : #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */
284 : #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */
285 :
286 : /* Mount features */
287 : #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */
288 : #define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */
289 : #define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */
290 : #define XFS_FEAT_LARGE_IOSIZE (1ULL << 51) /* report large preferred
291 : * I/O size in stat() */
292 : #define XFS_FEAT_WSYNC (1ULL << 52) /* synchronous metadata ops */
293 : #define XFS_FEAT_DIRSYNC (1ULL << 53) /* synchronous directory ops */
294 : #define XFS_FEAT_DISCARD (1ULL << 54) /* discard unused blocks */
295 : #define XFS_FEAT_GRPID (1ULL << 55) /* group-ID assigned from directory */
296 : #define XFS_FEAT_SMALL_INUMS (1ULL << 56) /* user wants 32bit inodes */
297 : #define XFS_FEAT_IKEEP (1ULL << 57) /* keep empty inode clusters*/
298 : #define XFS_FEAT_SWALLOC (1ULL << 58) /* stripe width allocation */
299 : #define XFS_FEAT_FILESTREAMS (1ULL << 59) /* use filestreams allocator */
300 : #define XFS_FEAT_DAX_ALWAYS (1ULL << 60) /* DAX always enabled */
301 : #define XFS_FEAT_DAX_NEVER (1ULL << 61) /* DAX never enabled */
302 : #define XFS_FEAT_NORECOVERY (1ULL << 62) /* no recovery - dirty fs */
303 : #define XFS_FEAT_NOUUID (1ULL << 63) /* ignore uuid during mount */
304 :
305 : #define __XFS_HAS_FEAT(name, NAME) \
306 : static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
307 : { \
308 : return mp->m_features & XFS_FEAT_ ## NAME; \
309 : }
310 :
311 : /* Some features can be added dynamically so they need a set wrapper, too. */
312 : #define __XFS_ADD_FEAT(name, NAME) \
313 : __XFS_HAS_FEAT(name, NAME); \
314 : static inline void xfs_add_ ## name (struct xfs_mount *mp) \
315 : { \
316 : mp->m_features |= XFS_FEAT_ ## NAME; \
317 : xfs_sb_version_add ## name(&mp->m_sb); \
318 : }
319 :
320 : /* Superblock features */
321 18821723 : __XFS_ADD_FEAT(attr, ATTR)
322 : __XFS_HAS_FEAT(nlink, NLINK)
323 >11857*10^7 : __XFS_ADD_FEAT(quota, QUOTA)
324 1926549 : __XFS_HAS_FEAT(align, ALIGN)
325 1926539 : __XFS_HAS_FEAT(dalign, DALIGN)
326 2750039560 : __XFS_HAS_FEAT(logv2, LOGV2)
327 1926541 : __XFS_HAS_FEAT(sector, SECTOR)
328 : __XFS_HAS_FEAT(extflg, EXTFLG)
329 3909729841 : __XFS_HAS_FEAT(asciici, ASCIICI)
330 3478330743 : __XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT)
331 51937707 : __XFS_ADD_FEAT(attr2, ATTR2)
332 : __XFS_HAS_FEAT(parent, PARENT)
333 326888502 : __XFS_ADD_FEAT(projid32, PROJID32)
334 >27132*10^7 : __XFS_HAS_FEAT(crc, CRC)
335 55976356094 : __XFS_HAS_FEAT(v3inodes, V3INODES)
336 3715065 : __XFS_HAS_FEAT(pquotino, PQUOTINO)
337 >29358*10^7 : __XFS_HAS_FEAT(ftype, FTYPE)
338 713591166 : __XFS_HAS_FEAT(finobt, FINOBT)
339 1722003441 : __XFS_HAS_FEAT(rmapbt, RMAPBT)
340 1124235012 : __XFS_HAS_FEAT(reflink, REFLINK)
341 14464458963 : __XFS_HAS_FEAT(sparseinodes, SPINODES)
342 1072299 : __XFS_HAS_FEAT(metauuid, META_UUID)
343 3690000 : __XFS_HAS_FEAT(realtime, REALTIME)
344 3674063 : __XFS_HAS_FEAT(inobtcounts, INOBTCNT)
345 2427149650 : __XFS_HAS_FEAT(bigtime, BIGTIME)
346 22505 : __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
347 364248708 : __XFS_HAS_FEAT(large_extent_counts, NREXT64)
348 :
349 : /*
350 : * Mount features
351 : *
352 : * These do not change dynamically - features that can come and go, such as 32
353 : * bit inodes and read-only state, are kept as operational state rather than
354 : * features.
355 : */
356 31630996 : __XFS_HAS_FEAT(noattr2, NOATTR2)
357 45924 : __XFS_HAS_FEAT(noalign, NOALIGN)
358 10925555 : __XFS_HAS_FEAT(allocsize, ALLOCSIZE)
359 1148684264 : __XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE)
360 390903252 : __XFS_HAS_FEAT(wsync, WSYNC)
361 105412347 : __XFS_HAS_FEAT(dirsync, DIRSYNC)
362 2573268 : __XFS_HAS_FEAT(discard, DISCARD)
363 77811684 : __XFS_HAS_FEAT(grpid, GRPID)
364 4427091 : __XFS_HAS_FEAT(small_inums, SMALL_INUMS)
365 76866827 : __XFS_HAS_FEAT(ikeep, IKEEP)
366 50534 : __XFS_HAS_FEAT(swalloc, SWALLOC)
367 21000792 : __XFS_HAS_FEAT(filestreams, FILESTREAMS)
368 478564 : __XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
369 456063 : __XFS_HAS_FEAT(dax_never, DAX_NEVER)
370 2728167339 : __XFS_HAS_FEAT(norecovery, NORECOVERY)
371 44989 : __XFS_HAS_FEAT(nouuid, NOUUID)
372 :
373 : /*
374 : * Operational mount state flags
375 : *
376 : * Use these with atomic bit ops only!
377 : */
378 : #define XFS_OPSTATE_UNMOUNTING 0 /* filesystem is unmounting */
379 : #define XFS_OPSTATE_CLEAN 1 /* mount was clean */
380 : #define XFS_OPSTATE_SHUTDOWN 2 /* stop all fs operations */
381 : #define XFS_OPSTATE_INODE32 3 /* inode32 allocator active */
382 : #define XFS_OPSTATE_READONLY 4 /* read-only fs */
383 :
384 : /*
385 : * If set, inactivation worker threads will be scheduled to process queued
386 : * inodegc work. If not, queued inodes remain in memory waiting to be
387 : * processed.
388 : */
389 : #define XFS_OPSTATE_INODEGC_ENABLED 5
390 : /*
391 : * If set, background speculative prealloc gc worker threads will be scheduled
392 : * to process queued blockgc work. If not, inodes retain their preallocations
393 : * until explicitly deleted.
394 : */
395 : #define XFS_OPSTATE_BLOCKGC_ENABLED 6
396 :
397 : /* Kernel has logged a warning about online fsck being used on this fs. */
398 : #define XFS_OPSTATE_WARNED_SCRUB 7
399 : /* Kernel has logged a warning about shrink being used on this fs. */
400 : #define XFS_OPSTATE_WARNED_SHRINK 8
401 : /* Kernel has logged a warning about logged xattr updates being used. */
402 : #define XFS_OPSTATE_WARNED_LARP 9
403 :
404 : #define __XFS_IS_OPSTATE(name, NAME) \
405 : static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
406 : { \
407 : return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
408 : } \
409 : static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
410 : { \
411 : return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
412 : } \
413 : static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
414 : { \
415 : return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
416 : }
417 :
418 306142 : __XFS_IS_OPSTATE(unmounting, UNMOUNTING)
419 45117 : __XFS_IS_OPSTATE(clean, CLEAN)
420 26273707313 : __XFS_IS_OPSTATE(shutdown, SHUTDOWN)
421 2664567 : __XFS_IS_OPSTATE(inode32, INODE32)
422 1635216510 : __XFS_IS_OPSTATE(readonly, READONLY)
423 47219573 : __XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
424 756993 : __XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED)
425 :
426 : static inline bool
427 1873331605 : xfs_should_warn(struct xfs_mount *mp, long nr)
428 : {
429 1873331605 : return !test_and_set_bit(nr, &mp->m_opstate);
430 : }
431 :
432 : #define XFS_OPSTATE_STRINGS \
433 : { (1UL << XFS_OPSTATE_UNMOUNTING), "unmounting" }, \
434 : { (1UL << XFS_OPSTATE_CLEAN), "clean" }, \
435 : { (1UL << XFS_OPSTATE_SHUTDOWN), "shutdown" }, \
436 : { (1UL << XFS_OPSTATE_INODE32), "inode32" }, \
437 : { (1UL << XFS_OPSTATE_READONLY), "read_only" }, \
438 : { (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }, \
439 : { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED), "blockgc" }, \
440 : { (1UL << XFS_OPSTATE_WARNED_SCRUB), "wscrub" }, \
441 : { (1UL << XFS_OPSTATE_WARNED_SHRINK), "wshrink" }, \
442 : { (1UL << XFS_OPSTATE_WARNED_LARP), "wlarp" }
443 :
444 : /*
445 : * Max and min values for mount-option defined I/O
446 : * preallocation sizes.
447 : */
448 : #define XFS_MAX_IO_LOG 30 /* 1G */
449 : #define XFS_MIN_IO_LOG PAGE_SHIFT
450 :
451 : void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
452 : int lnnum);
453 : #define xfs_force_shutdown(m,f) \
454 : xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
455 :
456 : #define SHUTDOWN_META_IO_ERROR (1u << 0) /* write attempt to metadata failed */
457 : #define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */
458 : #define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */
459 : #define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */
460 : #define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */
461 : #define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */
462 :
463 : #define XFS_SHUTDOWN_STRINGS \
464 : { SHUTDOWN_META_IO_ERROR, "metadata_io" }, \
465 : { SHUTDOWN_LOG_IO_ERROR, "log_io" }, \
466 : { SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \
467 : { SHUTDOWN_CORRUPT_INCORE, "corruption" }, \
468 : { SHUTDOWN_DEVICE_REMOVED, "device_removed" }
469 :
470 : /*
471 : * Flags for xfs_mountfs
472 : */
473 : #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
474 :
475 : static inline xfs_agnumber_t
476 16405435704 : xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
477 : {
478 16405435704 : xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
479 16405435704 : do_div(ld, mp->m_sb.sb_agblocks);
480 16405435704 : return (xfs_agnumber_t) ld;
481 : }
482 :
483 : static inline xfs_agblock_t
484 >14339*10^7 : xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
485 : {
486 >14339*10^7 : xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
487 >14339*10^7 : return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
488 : }
489 :
490 : int xfs_buf_hash_init(struct xfs_perag *pag);
491 : void xfs_buf_hash_destroy(struct xfs_perag *pag);
492 :
493 : extern void xfs_uuid_table_free(void);
494 : extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
495 : extern int xfs_mountfs(xfs_mount_t *mp);
496 : extern void xfs_unmountfs(xfs_mount_t *);
497 :
498 : /*
499 : * Deltas for the block count can vary from 1 to very large, but lock contention
500 : * only occurs on frequent small block count updates such as in the delayed
501 : * allocation path for buffered writes (page a time updates). Hence we set
502 : * a large batch count (1024) to minimise global counter updates except when
503 : * we get near to ENOSPC and we have to be very accurate with our updates.
504 : */
505 : #define XFS_FDBLOCKS_BATCH 1024
506 :
507 : /*
508 : * Estimate the amount of free space that is not available to userspace and is
509 : * not explicitly reserved from the incore fdblocks. This includes:
510 : *
511 : * - The minimum number of blocks needed to support splitting a bmap btree
512 : * - The blocks currently in use by the freespace btrees because they record
513 : * the actual blocks that will fill per-AG metadata space reservations
514 : */
515 : static inline uint64_t
516 : xfs_fdblocks_unavailable(
517 : struct xfs_mount *mp)
518 : {
519 455264020 : return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);
520 : }
521 :
522 : int xfs_mod_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
523 : int64_t delta, bool rsvd);
524 :
525 : static inline int
526 : xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, bool reserved)
527 : {
528 901157229 : return xfs_mod_freecounter(mp, &mp->m_fdblocks, delta, reserved);
529 : }
530 :
531 : static inline int
532 : xfs_mod_frextents(struct xfs_mount *mp, int64_t delta)
533 : {
534 11478855 : return xfs_mod_freecounter(mp, &mp->m_frextents, delta, false);
535 : }
536 :
537 : extern int xfs_readsb(xfs_mount_t *, int);
538 : extern void xfs_freesb(xfs_mount_t *);
539 : extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
540 : extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
541 :
542 : extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
543 :
544 : extern void xfs_set_low_space_thresholds(struct xfs_mount *);
545 :
546 : int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
547 : xfs_off_t count_fsb);
548 :
549 : struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
550 : int error_class, int error);
551 : void xfs_force_summary_recalc(struct xfs_mount *mp);
552 : int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
553 : bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
554 : void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
555 :
556 : #endif /* __XFS_MOUNT_H__ */
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