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 * Container for each type of groups, used to look up individual groups and
76 * describes the geometry.
77 */
78 struct 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 */
117 typedef 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_rtrmap_mxr[2]; /* max rtrmap btree records */
162 uint m_rtrmap_mnr[2]; /* min rtrmap btree records */
163 uint m_refc_mxr[2]; /* max refc btree records */
164 uint m_refc_mnr[2]; /* min refc btree records */
165 uint m_rtrefc_mxr[2]; /* max rtrefc btree records */
166 uint m_rtrefc_mnr[2]; /* min rtrefc btree records */
167 uint m_alloc_maxlevels; /* max alloc btree levels */
168 uint m_bm_maxlevels[2]; /* max bmap btree levels */
169 uint m_rmap_maxlevels; /* max rmap btree levels */
170 uint m_rtrmap_maxlevels; /* max rtrmap btree level */
171 uint m_refc_maxlevels; /* max refcount btree level */
172 uint m_rtrefc_maxlevels; /* max rtrefc btree level */
173 unsigned int m_agbtree_maxlevels; /* max level of all AG btrees */
174 unsigned int m_rtbtree_maxlevels; /* max level of all rt btrees */
175 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
176 uint m_alloc_set_aside; /* space we can't use */
177 uint m_ag_max_usable; /* max space per AG */
178 int m_dalign; /* stripe unit */
179 int m_swidth; /* stripe width */
180 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
181 uint m_allocsize_log;/* min write size log bytes */
182 uint m_allocsize_blocks; /* min write size blocks */
183 int m_logbufs; /* number of log buffers */
184 int m_logbsize; /* size of each log buffer */
185 unsigned int m_rsumlevels; /* rt summary levels */
186 xfs_filblks_t m_rsumblocks; /* size of rt summary, FSBs */
187 int m_fixedfsid[2]; /* unchanged for life of FS */
188 uint m_qflags; /* quota status flags */
189 uint64_t m_features; /* active filesystem features */
190 uint64_t m_low_space[XFS_LOWSP_MAX];
191 uint64_t m_low_rtexts[XFS_LOWSP_MAX];
192 uint64_t m_rtxblkmask; /* rt extent block mask */
193 struct xfs_ino_geometry m_ino_geo; /* inode geometry */
194 struct xfs_trans_resv m_resv; /* precomputed res values */
195 /* low free space thresholds */
196 unsigned long m_opstate; /* dynamic state flags */
197 bool m_always_cow;
198 bool m_fail_unmount;
199 bool m_finobt_nores; /* no per-AG finobt resv. */
200 bool m_update_sb; /* sb needs update in mount */
201
202 /*
203 * Bitsets of per-fs metadata that have been checked and/or are sick.
204 * Callers must hold m_sb_lock to access these two fields.
205 */
206 uint8_t m_fs_checked;
207 uint8_t m_fs_sick;
208 /*
209 * Bitsets of rt metadata that have been checked and/or are sick.
210 * Callers must hold m_sb_lock to access this field.
211 */
212 uint8_t m_rt_checked;
213 uint8_t m_rt_sick;
214
215 /*
216 * End of read-mostly variables. Frequently written variables and locks
217 * should be placed below this comment from now on. The first variable
218 * here is marked as cacheline aligned so they it is separated from
219 * the read-mostly variables.
220 */
221
222 spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
223 struct percpu_counter m_icount; /* allocated inodes counter */
224 struct percpu_counter m_ifree; /* free inodes counter */
225 struct percpu_counter m_fdblocks; /* free block counter */
226 struct percpu_counter m_frextents; /* free rt extent counter */
227
228 /*
229 * Count of data device blocks reserved for delayed allocations,
230 * including indlen blocks. Does not include allocated CoW staging
231 * extents or anything related to the rt device.
232 */
233 struct percpu_counter m_delalloc_blks;
234
235 /*
236 * RT version of the above.
237 */
238 struct percpu_counter m_delalloc_rtextents;
239
240 /*
241 * Global count of allocation btree blocks in use across all AGs. Only
242 * used when perag reservation is enabled. Helps prevent block
243 * reservation from attempting to reserve allocation btree blocks.
244 */
245 atomic64_t m_allocbt_blks;
246
247 struct xfs_groups m_groups[XG_TYPE_MAX];
248 uint64_t m_resblks; /* total reserved blocks */
249 uint64_t m_resblks_avail;/* available reserved blocks */
250 uint64_t m_resblks_save; /* reserved blks @ remount,ro */
251 struct delayed_work m_reclaim_work; /* background inode reclaim */
252 struct dentry *m_debugfs; /* debugfs parent */
253 struct xfs_kobj m_kobj;
254 struct xfs_kobj m_error_kobj;
255 struct xfs_kobj m_error_meta_kobj;
256 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
257 struct xstats m_stats; /* per-fs stats */
258 #ifdef CONFIG_XFS_ONLINE_SCRUB_STATS
259 struct xchk_stats *m_scrub_stats;
260 #endif
261 xfs_agnumber_t m_agfrotor; /* last ag where space found */
262 atomic_t m_agirotor; /* last ag dir inode alloced */
263 atomic_t m_rtgrotor; /* last rtgroup rtpicked */
264
265 /* Memory shrinker to throttle and reprioritize inodegc */
266 struct shrinker *m_inodegc_shrinker;
267 /*
268 * Workqueue item so that we can coalesce multiple inode flush attempts
269 * into a single flush.
270 */
271 struct work_struct m_flush_inodes_work;
272
273 /*
274 * Generation of the filesysyem layout. This is incremented by each
275 * growfs, and used by the pNFS server to ensure the client updates
276 * its view of the block device once it gets a layout that might
277 * reference the newly added blocks. Does not need to be persistent
278 * as long as we only allow file system size increments, but if we
279 * ever support shrinks it would have to be persisted in addition
280 * to various other kinds of pain inflicted on the pNFS server.
281 */
282 uint32_t m_generation;
283 struct mutex m_growlock; /* growfs mutex */
284
285 #ifdef DEBUG
286 /*
287 * Frequency with which errors are injected. Replaces xfs_etest; the
288 * value stored in here is the inverse of the frequency with which the
289 * error triggers. 1 = always, 2 = half the time, etc.
290 */
291 unsigned int *m_errortag;
292 struct xfs_kobj m_errortag_kobj;
293 #endif
294
295 /* cpus that have inodes queued for inactivation */
296 struct cpumask m_inodegc_cpumask;
297
298 /* Hook to feed dirent updates to an active online repair. */
299 struct xfs_hooks m_dir_update_hooks;
300 } xfs_mount_t;
301
302 #define M_IGEO(mp) (&(mp)->m_ino_geo)
303
304 /*
305 * Flags for m_features.
306 *
307 * These are all the active features in the filesystem, regardless of how
308 * they are configured.
309 */
310 #define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */
311 #define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */
312 #define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */
313 #define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */
314 #define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */
315 #define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */
316 #define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */
317 #define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */
318 #define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */
319 #define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */
320 #define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */
321 #define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */
322 #define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */
323 #define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */
324 #define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */
325 #define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */
326 #define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */
327 #define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */
328 #define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */
329 #define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */
330 #define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */
331 #define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */
332 #define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */
333 #define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */
334 #define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */
335 #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */
336 #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */
337 #define XFS_FEAT_EXCHANGE_RANGE (1ULL << 27) /* exchange range */
338 #define XFS_FEAT_METADIR (1ULL << 28) /* metadata directory tree */
339
340 /* Mount features */
341 #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */
342 #define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */
343 #define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */
344 #define XFS_FEAT_LARGE_IOSIZE (1ULL << 51) /* report large preferred
345 * I/O size in stat() */
346 #define XFS_FEAT_WSYNC (1ULL << 52) /* synchronous metadata ops */
347 #define XFS_FEAT_DIRSYNC (1ULL << 53) /* synchronous directory ops */
348 #define XFS_FEAT_DISCARD (1ULL << 54) /* discard unused blocks */
349 #define XFS_FEAT_GRPID (1ULL << 55) /* group-ID assigned from directory */
350 #define XFS_FEAT_SMALL_INUMS (1ULL << 56) /* user wants 32bit inodes */
351 #define XFS_FEAT_IKEEP (1ULL << 57) /* keep empty inode clusters*/
352 #define XFS_FEAT_SWALLOC (1ULL << 58) /* stripe width allocation */
353 #define XFS_FEAT_FILESTREAMS (1ULL << 59) /* use filestreams allocator */
354 #define XFS_FEAT_DAX_ALWAYS (1ULL << 60) /* DAX always enabled */
355 #define XFS_FEAT_DAX_NEVER (1ULL << 61) /* DAX never enabled */
356 #define XFS_FEAT_NORECOVERY (1ULL << 62) /* no recovery - dirty fs */
357 #define XFS_FEAT_NOUUID (1ULL << 63) /* ignore uuid during mount */
358
359 #define __XFS_HAS_FEAT(name, NAME) \
360 static inline bool xfs_has_ ## name (const struct xfs_mount *mp) \
361 { \
362 return mp->m_features & XFS_FEAT_ ## NAME; \
363 }
364
365 /* Some features can be added dynamically so they need a set wrapper, too. */
366 #define __XFS_ADD_FEAT(name, NAME) \
367 __XFS_HAS_FEAT(name, NAME); \
368 static inline void xfs_add_ ## name (struct xfs_mount *mp) \
369 { \
370 mp->m_features |= XFS_FEAT_ ## NAME; \
371 xfs_sb_version_add ## name(&mp->m_sb); \
372 }
373
374 /* Superblock features */
__XFS_ADD_FEAT(attr,ATTR)375 __XFS_ADD_FEAT(attr, ATTR)
376 __XFS_HAS_FEAT(nlink, NLINK)
377 __XFS_ADD_FEAT(quota, QUOTA)
378 __XFS_HAS_FEAT(dalign, DALIGN)
379 __XFS_HAS_FEAT(sector, SECTOR)
380 __XFS_HAS_FEAT(asciici, ASCIICI)
381 __XFS_HAS_FEAT(parent, PARENT)
382 __XFS_HAS_FEAT(ftype, FTYPE)
383 __XFS_HAS_FEAT(finobt, FINOBT)
384 __XFS_HAS_FEAT(rmapbt, RMAPBT)
385 __XFS_HAS_FEAT(reflink, REFLINK)
386 __XFS_HAS_FEAT(sparseinodes, SPINODES)
387 __XFS_HAS_FEAT(metauuid, META_UUID)
388 __XFS_HAS_FEAT(realtime, REALTIME)
389 __XFS_HAS_FEAT(inobtcounts, INOBTCNT)
390 __XFS_HAS_FEAT(bigtime, BIGTIME)
391 __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
392 __XFS_HAS_FEAT(large_extent_counts, NREXT64)
393 __XFS_HAS_FEAT(exchange_range, EXCHANGE_RANGE)
394 __XFS_HAS_FEAT(metadir, METADIR)
395
396 static inline bool xfs_has_rtgroups(const struct xfs_mount *mp)
397 {
398 /* all metadir file systems also allow rtgroups */
399 return xfs_has_metadir(mp);
400 }
401
xfs_has_rtsb(const struct xfs_mount * mp)402 static inline bool xfs_has_rtsb(const struct xfs_mount *mp)
403 {
404 /* all rtgroups filesystems with an rt section have an rtsb */
405 return xfs_has_rtgroups(mp) && xfs_has_realtime(mp);
406 }
407
xfs_has_rtrmapbt(const struct xfs_mount * mp)408 static inline bool xfs_has_rtrmapbt(const struct xfs_mount *mp)
409 {
410 return xfs_has_rtgroups(mp) && xfs_has_realtime(mp) &&
411 xfs_has_rmapbt(mp);
412 }
413
xfs_has_rtreflink(const struct xfs_mount * mp)414 static inline bool xfs_has_rtreflink(const struct xfs_mount *mp)
415 {
416 return xfs_has_metadir(mp) && xfs_has_realtime(mp) &&
417 xfs_has_reflink(mp);
418 }
419
420 /*
421 * Some features are always on for v5 file systems, allow the compiler to
422 * eliminiate dead code when building without v4 support.
423 */
424 #define __XFS_HAS_V4_FEAT(name, NAME) \
425 static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
426 { \
427 return !IS_ENABLED(CONFIG_XFS_SUPPORT_V4) || \
428 (mp->m_features & XFS_FEAT_ ## NAME); \
429 }
430
431 #define __XFS_ADD_V4_FEAT(name, NAME) \
432 __XFS_HAS_V4_FEAT(name, NAME); \
433 static inline void xfs_add_ ## name (struct xfs_mount *mp) \
434 { \
435 if (IS_ENABLED(CONFIG_XFS_SUPPORT_V4)) { \
436 mp->m_features |= XFS_FEAT_ ## NAME; \
437 xfs_sb_version_add ## name(&mp->m_sb); \
438 } \
439 }
440
__XFS_HAS_V4_FEAT(align,ALIGN)441 __XFS_HAS_V4_FEAT(align, ALIGN)
442 __XFS_HAS_V4_FEAT(logv2, LOGV2)
443 __XFS_HAS_V4_FEAT(extflg, EXTFLG)
444 __XFS_HAS_V4_FEAT(lazysbcount, LAZYSBCOUNT)
445 __XFS_ADD_V4_FEAT(attr2, ATTR2)
446 __XFS_ADD_V4_FEAT(projid32, PROJID32)
447 __XFS_HAS_V4_FEAT(v3inodes, V3INODES)
448 __XFS_HAS_V4_FEAT(crc, CRC)
449 __XFS_HAS_V4_FEAT(pquotino, PQUOTINO)
450
451 /*
452 * Mount features
453 *
454 * These do not change dynamically - features that can come and go, such as 32
455 * bit inodes and read-only state, are kept as operational state rather than
456 * features.
457 */
458 __XFS_HAS_FEAT(noattr2, NOATTR2)
459 __XFS_HAS_FEAT(noalign, NOALIGN)
460 __XFS_HAS_FEAT(allocsize, ALLOCSIZE)
461 __XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE)
462 __XFS_HAS_FEAT(wsync, WSYNC)
463 __XFS_HAS_FEAT(dirsync, DIRSYNC)
464 __XFS_HAS_FEAT(discard, DISCARD)
465 __XFS_HAS_FEAT(grpid, GRPID)
466 __XFS_HAS_FEAT(small_inums, SMALL_INUMS)
467 __XFS_HAS_FEAT(ikeep, IKEEP)
468 __XFS_HAS_FEAT(swalloc, SWALLOC)
469 __XFS_HAS_FEAT(filestreams, FILESTREAMS)
470 __XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
471 __XFS_HAS_FEAT(dax_never, DAX_NEVER)
472 __XFS_HAS_FEAT(norecovery, NORECOVERY)
473 __XFS_HAS_FEAT(nouuid, NOUUID)
474
475 /*
476 * Operational mount state flags
477 *
478 * Use these with atomic bit ops only!
479 */
480 #define XFS_OPSTATE_UNMOUNTING 0 /* filesystem is unmounting */
481 #define XFS_OPSTATE_CLEAN 1 /* mount was clean */
482 #define XFS_OPSTATE_SHUTDOWN 2 /* stop all fs operations */
483 #define XFS_OPSTATE_INODE32 3 /* inode32 allocator active */
484 #define XFS_OPSTATE_READONLY 4 /* read-only fs */
485
486 /*
487 * If set, inactivation worker threads will be scheduled to process queued
488 * inodegc work. If not, queued inodes remain in memory waiting to be
489 * processed.
490 */
491 #define XFS_OPSTATE_INODEGC_ENABLED 5
492 /*
493 * If set, background speculative prealloc gc worker threads will be scheduled
494 * to process queued blockgc work. If not, inodes retain their preallocations
495 * until explicitly deleted.
496 */
497 #define XFS_OPSTATE_BLOCKGC_ENABLED 6
498
499 /* Kernel has logged a warning about pNFS being used on this fs. */
500 #define XFS_OPSTATE_WARNED_PNFS 7
501 /* Kernel has logged a warning about online fsck being used on this fs. */
502 #define XFS_OPSTATE_WARNED_SCRUB 8
503 /* Kernel has logged a warning about shrink being used on this fs. */
504 #define XFS_OPSTATE_WARNED_SHRINK 9
505 /* Kernel has logged a warning about logged xattr updates being used. */
506 #define XFS_OPSTATE_WARNED_LARP 10
507 /* Mount time quotacheck is running */
508 #define XFS_OPSTATE_QUOTACHECK_RUNNING 11
509 /* Do we want to clear log incompat flags? */
510 #define XFS_OPSTATE_UNSET_LOG_INCOMPAT 12
511 /* Filesystem can use logged extended attributes */
512 #define XFS_OPSTATE_USE_LARP 13
513 /* Kernel has logged a warning about blocksize > pagesize on this fs. */
514 #define XFS_OPSTATE_WARNED_LBS 14
515 /* Kernel has logged a warning about exchange-range being used on this fs. */
516 #define XFS_OPSTATE_WARNED_EXCHRANGE 15
517 /* Kernel has logged a warning about parent pointers being used on this fs. */
518 #define XFS_OPSTATE_WARNED_PPTR 16
519 /* Kernel has logged a warning about metadata dirs being used on this fs. */
520 #define XFS_OPSTATE_WARNED_METADIR 17
521 /* Filesystem should use qflags to determine quotaon status */
522 #define XFS_OPSTATE_RESUMING_QUOTAON 18
523
524 #define __XFS_IS_OPSTATE(name, NAME) \
525 static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
526 { \
527 return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
528 } \
529 static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
530 { \
531 return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
532 } \
533 static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
534 { \
535 return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
536 }
537
538 __XFS_IS_OPSTATE(unmounting, UNMOUNTING)
539 __XFS_IS_OPSTATE(clean, CLEAN)
540 __XFS_IS_OPSTATE(shutdown, SHUTDOWN)
541 __XFS_IS_OPSTATE(inode32, INODE32)
542 __XFS_IS_OPSTATE(readonly, READONLY)
543 __XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
544 __XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED)
545 #ifdef CONFIG_XFS_QUOTA
546 __XFS_IS_OPSTATE(quotacheck_running, QUOTACHECK_RUNNING)
547 __XFS_IS_OPSTATE(resuming_quotaon, RESUMING_QUOTAON)
548 #else
549 static inline bool xfs_is_quotacheck_running(struct xfs_mount *mp)
550 {
551 return false;
552 }
553 static inline bool xfs_is_resuming_quotaon(struct xfs_mount *mp)
554 {
555 return false;
556 }
557 static inline void xfs_set_resuming_quotaon(struct xfs_mount *m)
558 {
559 }
560 static inline bool xfs_clear_resuming_quotaon(struct xfs_mount *mp)
561 {
562 return false;
563 }
564 #endif /* CONFIG_XFS_QUOTA */
565 __XFS_IS_OPSTATE(done_with_log_incompat, UNSET_LOG_INCOMPAT)
566 __XFS_IS_OPSTATE(using_logged_xattrs, USE_LARP)
567
568 static inline bool
569 xfs_should_warn(struct xfs_mount *mp, long nr)
570 {
571 return !test_and_set_bit(nr, &mp->m_opstate);
572 }
573
574 #define XFS_OPSTATE_STRINGS \
575 { (1UL << XFS_OPSTATE_UNMOUNTING), "unmounting" }, \
576 { (1UL << XFS_OPSTATE_CLEAN), "clean" }, \
577 { (1UL << XFS_OPSTATE_SHUTDOWN), "shutdown" }, \
578 { (1UL << XFS_OPSTATE_INODE32), "inode32" }, \
579 { (1UL << XFS_OPSTATE_READONLY), "read_only" }, \
580 { (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }, \
581 { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED), "blockgc" }, \
582 { (1UL << XFS_OPSTATE_WARNED_SCRUB), "wscrub" }, \
583 { (1UL << XFS_OPSTATE_WARNED_SHRINK), "wshrink" }, \
584 { (1UL << XFS_OPSTATE_WARNED_LARP), "wlarp" }, \
585 { (1UL << XFS_OPSTATE_QUOTACHECK_RUNNING), "quotacheck" }, \
586 { (1UL << XFS_OPSTATE_UNSET_LOG_INCOMPAT), "unset_log_incompat" }, \
587 { (1UL << XFS_OPSTATE_USE_LARP), "logged_xattrs" }
588
589 /*
590 * Max and min values for mount-option defined I/O
591 * preallocation sizes.
592 */
593 #define XFS_MAX_IO_LOG 30 /* 1G */
594 #define XFS_MIN_IO_LOG PAGE_SHIFT
595
596 void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
597 int lnnum);
598 #define xfs_force_shutdown(m,f) \
599 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
600
601 #define SHUTDOWN_META_IO_ERROR (1u << 0) /* write attempt to metadata failed */
602 #define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */
603 #define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */
604 #define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */
605 #define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */
606 #define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */
607
608 #define XFS_SHUTDOWN_STRINGS \
609 { SHUTDOWN_META_IO_ERROR, "metadata_io" }, \
610 { SHUTDOWN_LOG_IO_ERROR, "log_io" }, \
611 { SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \
612 { SHUTDOWN_CORRUPT_INCORE, "corruption" }, \
613 { SHUTDOWN_DEVICE_REMOVED, "device_removed" }
614
615 /*
616 * Flags for xfs_mountfs
617 */
618 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
619
620 static inline xfs_agnumber_t
xfs_daddr_to_agno(struct xfs_mount * mp,xfs_daddr_t d)621 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
622 {
623 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
624 do_div(ld, mp->m_sb.sb_agblocks);
625 return (xfs_agnumber_t) ld;
626 }
627
628 static inline xfs_agblock_t
xfs_daddr_to_agbno(struct xfs_mount * mp,xfs_daddr_t d)629 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
630 {
631 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
632 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
633 }
634
635 extern void xfs_uuid_table_free(void);
636 extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
637 extern int xfs_mountfs(xfs_mount_t *mp);
638 extern void xfs_unmountfs(xfs_mount_t *);
639
640 /*
641 * Deltas for the block count can vary from 1 to very large, but lock contention
642 * only occurs on frequent small block count updates such as in the delayed
643 * allocation path for buffered writes (page a time updates). Hence we set
644 * a large batch count (1024) to minimise global counter updates except when
645 * we get near to ENOSPC and we have to be very accurate with our updates.
646 */
647 #define XFS_FDBLOCKS_BATCH 1024
648
649 /*
650 * Estimate the amount of free space that is not available to userspace and is
651 * not explicitly reserved from the incore fdblocks. This includes:
652 *
653 * - The minimum number of blocks needed to support splitting a bmap btree
654 * - The blocks currently in use by the freespace btrees because they record
655 * the actual blocks that will fill per-AG metadata space reservations
656 */
657 static inline uint64_t
xfs_fdblocks_unavailable(struct xfs_mount * mp)658 xfs_fdblocks_unavailable(
659 struct xfs_mount *mp)
660 {
661 return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);
662 }
663
664 int xfs_dec_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
665 uint64_t delta, bool rsvd);
666 void xfs_add_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
667 uint64_t delta);
668
xfs_dec_fdblocks(struct xfs_mount * mp,uint64_t delta,bool reserved)669 static inline int xfs_dec_fdblocks(struct xfs_mount *mp, uint64_t delta,
670 bool reserved)
671 {
672 return xfs_dec_freecounter(mp, &mp->m_fdblocks, delta, reserved);
673 }
674
xfs_add_fdblocks(struct xfs_mount * mp,uint64_t delta)675 static inline void xfs_add_fdblocks(struct xfs_mount *mp, uint64_t delta)
676 {
677 xfs_add_freecounter(mp, &mp->m_fdblocks, delta);
678 }
679
xfs_dec_frextents(struct xfs_mount * mp,uint64_t delta)680 static inline int xfs_dec_frextents(struct xfs_mount *mp, uint64_t delta)
681 {
682 return xfs_dec_freecounter(mp, &mp->m_frextents, delta, false);
683 }
684
xfs_add_frextents(struct xfs_mount * mp,uint64_t delta)685 static inline void xfs_add_frextents(struct xfs_mount *mp, uint64_t delta)
686 {
687 xfs_add_freecounter(mp, &mp->m_frextents, delta);
688 }
689
690 extern int xfs_readsb(xfs_mount_t *, int);
691 extern void xfs_freesb(xfs_mount_t *);
692 extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
693 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
694
695 extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
696
697 extern void xfs_set_low_space_thresholds(struct xfs_mount *);
698
699 int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
700 xfs_off_t count_fsb);
701
702 struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
703 int error_class, int error);
704 void xfs_force_summary_recalc(struct xfs_mount *mp);
705 int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
706 bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
707 void xfs_mod_delalloc(struct xfs_inode *ip, int64_t data_delta,
708 int64_t ind_delta);
709
710 #endif /* __XFS_MOUNT_H__ */
711