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 __XFS_ADD_FEAT(attr, ATTR) 322 __XFS_HAS_FEAT(nlink, NLINK) 323 __XFS_ADD_FEAT(quota, QUOTA) 324 __XFS_HAS_FEAT(align, ALIGN) 325 __XFS_HAS_FEAT(dalign, DALIGN) 326 __XFS_HAS_FEAT(logv2, LOGV2) 327 __XFS_HAS_FEAT(sector, SECTOR) 328 __XFS_HAS_FEAT(extflg, EXTFLG) 329 __XFS_HAS_FEAT(asciici, ASCIICI) 330 __XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT) 331 __XFS_ADD_FEAT(attr2, ATTR2) 332 __XFS_HAS_FEAT(parent, PARENT) 333 __XFS_ADD_FEAT(projid32, PROJID32) 334 __XFS_HAS_FEAT(crc, CRC) 335 __XFS_HAS_FEAT(v3inodes, V3INODES) 336 __XFS_HAS_FEAT(pquotino, PQUOTINO) 337 __XFS_HAS_FEAT(ftype, FTYPE) 338 __XFS_HAS_FEAT(finobt, FINOBT) 339 __XFS_HAS_FEAT(rmapbt, RMAPBT) 340 __XFS_HAS_FEAT(reflink, REFLINK) 341 __XFS_HAS_FEAT(sparseinodes, SPINODES) 342 __XFS_HAS_FEAT(metauuid, META_UUID) 343 __XFS_HAS_FEAT(realtime, REALTIME) 344 __XFS_HAS_FEAT(inobtcounts, INOBTCNT) 345 __XFS_HAS_FEAT(bigtime, BIGTIME) 346 __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR) 347 __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 __XFS_HAS_FEAT(noattr2, NOATTR2) 357 __XFS_HAS_FEAT(noalign, NOALIGN) 358 __XFS_HAS_FEAT(allocsize, ALLOCSIZE) 359 __XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE) 360 __XFS_HAS_FEAT(wsync, WSYNC) 361 __XFS_HAS_FEAT(dirsync, DIRSYNC) 362 __XFS_HAS_FEAT(discard, DISCARD) 363 __XFS_HAS_FEAT(grpid, GRPID) 364 __XFS_HAS_FEAT(small_inums, SMALL_INUMS) 365 __XFS_HAS_FEAT(ikeep, IKEEP) 366 __XFS_HAS_FEAT(swalloc, SWALLOC) 367 __XFS_HAS_FEAT(filestreams, FILESTREAMS) 368 __XFS_HAS_FEAT(dax_always, DAX_ALWAYS) 369 __XFS_HAS_FEAT(dax_never, DAX_NEVER) 370 __XFS_HAS_FEAT(norecovery, NORECOVERY) 371 __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 __XFS_IS_OPSTATE(unmounting, UNMOUNTING) 419 __XFS_IS_OPSTATE(clean, CLEAN) 420 __XFS_IS_OPSTATE(shutdown, SHUTDOWN) 421 __XFS_IS_OPSTATE(inode32, INODE32) 422 __XFS_IS_OPSTATE(readonly, READONLY) 423 __XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED) 424 __XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED) 425 426 static inline bool 427 xfs_should_warn(struct xfs_mount *mp, long nr) 428 { 429 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 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 477 { 478 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 479 do_div(ld, mp->m_sb.sb_agblocks); 480 return (xfs_agnumber_t) ld; 481 } 482 483 static inline xfs_agblock_t 484 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 485 { 486 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 487 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 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 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 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__ */ 557