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 dentry *m_debugfs; /* debugfs parent */ 212 struct xfs_kobj m_kobj; 213 struct xfs_kobj m_error_kobj; 214 struct xfs_kobj m_error_meta_kobj; 215 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX]; 216 struct xstats m_stats; /* per-fs stats */ 217 #ifdef CONFIG_XFS_ONLINE_SCRUB_STATS 218 struct xchk_stats *m_scrub_stats; 219 #endif 220 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 221 atomic_t m_agirotor; /* last ag dir inode alloced */ 222 223 /* Memory shrinker to throttle and reprioritize inodegc */ 224 struct shrinker m_inodegc_shrinker; 225 /* 226 * Workqueue item so that we can coalesce multiple inode flush attempts 227 * into a single flush. 228 */ 229 struct work_struct m_flush_inodes_work; 230 231 /* 232 * Generation of the filesysyem layout. This is incremented by each 233 * growfs, and used by the pNFS server to ensure the client updates 234 * its view of the block device once it gets a layout that might 235 * reference the newly added blocks. Does not need to be persistent 236 * as long as we only allow file system size increments, but if we 237 * ever support shrinks it would have to be persisted in addition 238 * to various other kinds of pain inflicted on the pNFS server. 239 */ 240 uint32_t m_generation; 241 struct mutex m_growlock; /* growfs mutex */ 242 243 #ifdef DEBUG 244 /* 245 * Frequency with which errors are injected. Replaces xfs_etest; the 246 * value stored in here is the inverse of the frequency with which the 247 * error triggers. 1 = always, 2 = half the time, etc. 248 */ 249 unsigned int *m_errortag; 250 struct xfs_kobj m_errortag_kobj; 251 #endif 252 } xfs_mount_t; 253 254 #define M_IGEO(mp) (&(mp)->m_ino_geo) 255 256 /* 257 * Flags for m_features. 258 * 259 * These are all the active features in the filesystem, regardless of how 260 * they are configured. 261 */ 262 #define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */ 263 #define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */ 264 #define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */ 265 #define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */ 266 #define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */ 267 #define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */ 268 #define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */ 269 #define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */ 270 #define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */ 271 #define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */ 272 #define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */ 273 #define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */ 274 #define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */ 275 #define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */ 276 #define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */ 277 #define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */ 278 #define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */ 279 #define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */ 280 #define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */ 281 #define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */ 282 #define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */ 283 #define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */ 284 #define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */ 285 #define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */ 286 #define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */ 287 #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */ 288 #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */ 289 290 /* Mount features */ 291 #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */ 292 #define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */ 293 #define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */ 294 #define XFS_FEAT_LARGE_IOSIZE (1ULL << 51) /* report large preferred 295 * I/O size in stat() */ 296 #define XFS_FEAT_WSYNC (1ULL << 52) /* synchronous metadata ops */ 297 #define XFS_FEAT_DIRSYNC (1ULL << 53) /* synchronous directory ops */ 298 #define XFS_FEAT_DISCARD (1ULL << 54) /* discard unused blocks */ 299 #define XFS_FEAT_GRPID (1ULL << 55) /* group-ID assigned from directory */ 300 #define XFS_FEAT_SMALL_INUMS (1ULL << 56) /* user wants 32bit inodes */ 301 #define XFS_FEAT_IKEEP (1ULL << 57) /* keep empty inode clusters*/ 302 #define XFS_FEAT_SWALLOC (1ULL << 58) /* stripe width allocation */ 303 #define XFS_FEAT_FILESTREAMS (1ULL << 59) /* use filestreams allocator */ 304 #define XFS_FEAT_DAX_ALWAYS (1ULL << 60) /* DAX always enabled */ 305 #define XFS_FEAT_DAX_NEVER (1ULL << 61) /* DAX never enabled */ 306 #define XFS_FEAT_NORECOVERY (1ULL << 62) /* no recovery - dirty fs */ 307 #define XFS_FEAT_NOUUID (1ULL << 63) /* ignore uuid during mount */ 308 309 #define __XFS_HAS_FEAT(name, NAME) \ 310 static inline bool xfs_has_ ## name (struct xfs_mount *mp) \ 311 { \ 312 return mp->m_features & XFS_FEAT_ ## NAME; \ 313 } 314 315 /* Some features can be added dynamically so they need a set wrapper, too. */ 316 #define __XFS_ADD_FEAT(name, NAME) \ 317 __XFS_HAS_FEAT(name, NAME); \ 318 static inline void xfs_add_ ## name (struct xfs_mount *mp) \ 319 { \ 320 mp->m_features |= XFS_FEAT_ ## NAME; \ 321 xfs_sb_version_add ## name(&mp->m_sb); \ 322 } 323 324 /* Superblock features */ 325 __XFS_ADD_FEAT(attr, ATTR) 326 __XFS_HAS_FEAT(nlink, NLINK) 327 __XFS_ADD_FEAT(quota, QUOTA) 328 __XFS_HAS_FEAT(align, ALIGN) 329 __XFS_HAS_FEAT(dalign, DALIGN) 330 __XFS_HAS_FEAT(logv2, LOGV2) 331 __XFS_HAS_FEAT(sector, SECTOR) 332 __XFS_HAS_FEAT(extflg, EXTFLG) 333 __XFS_HAS_FEAT(asciici, ASCIICI) 334 __XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT) 335 __XFS_ADD_FEAT(attr2, ATTR2) 336 __XFS_HAS_FEAT(parent, PARENT) 337 __XFS_ADD_FEAT(projid32, PROJID32) 338 __XFS_HAS_FEAT(crc, CRC) 339 __XFS_HAS_FEAT(v3inodes, V3INODES) 340 __XFS_HAS_FEAT(pquotino, PQUOTINO) 341 __XFS_HAS_FEAT(ftype, FTYPE) 342 __XFS_HAS_FEAT(finobt, FINOBT) 343 __XFS_HAS_FEAT(rmapbt, RMAPBT) 344 __XFS_HAS_FEAT(reflink, REFLINK) 345 __XFS_HAS_FEAT(sparseinodes, SPINODES) 346 __XFS_HAS_FEAT(metauuid, META_UUID) 347 __XFS_HAS_FEAT(realtime, REALTIME) 348 __XFS_HAS_FEAT(inobtcounts, INOBTCNT) 349 __XFS_HAS_FEAT(bigtime, BIGTIME) 350 __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR) 351 __XFS_HAS_FEAT(large_extent_counts, NREXT64) 352 353 /* 354 * Mount features 355 * 356 * These do not change dynamically - features that can come and go, such as 32 357 * bit inodes and read-only state, are kept as operational state rather than 358 * features. 359 */ 360 __XFS_HAS_FEAT(noattr2, NOATTR2) 361 __XFS_HAS_FEAT(noalign, NOALIGN) 362 __XFS_HAS_FEAT(allocsize, ALLOCSIZE) 363 __XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE) 364 __XFS_HAS_FEAT(wsync, WSYNC) 365 __XFS_HAS_FEAT(dirsync, DIRSYNC) 366 __XFS_HAS_FEAT(discard, DISCARD) 367 __XFS_HAS_FEAT(grpid, GRPID) 368 __XFS_HAS_FEAT(small_inums, SMALL_INUMS) 369 __XFS_HAS_FEAT(ikeep, IKEEP) 370 __XFS_HAS_FEAT(swalloc, SWALLOC) 371 __XFS_HAS_FEAT(filestreams, FILESTREAMS) 372 __XFS_HAS_FEAT(dax_always, DAX_ALWAYS) 373 __XFS_HAS_FEAT(dax_never, DAX_NEVER) 374 __XFS_HAS_FEAT(norecovery, NORECOVERY) 375 __XFS_HAS_FEAT(nouuid, NOUUID) 376 377 /* 378 * Operational mount state flags 379 * 380 * Use these with atomic bit ops only! 381 */ 382 #define XFS_OPSTATE_UNMOUNTING 0 /* filesystem is unmounting */ 383 #define XFS_OPSTATE_CLEAN 1 /* mount was clean */ 384 #define XFS_OPSTATE_SHUTDOWN 2 /* stop all fs operations */ 385 #define XFS_OPSTATE_INODE32 3 /* inode32 allocator active */ 386 #define XFS_OPSTATE_READONLY 4 /* read-only fs */ 387 388 /* 389 * If set, inactivation worker threads will be scheduled to process queued 390 * inodegc work. If not, queued inodes remain in memory waiting to be 391 * processed. 392 */ 393 #define XFS_OPSTATE_INODEGC_ENABLED 5 394 /* 395 * If set, background speculative prealloc gc worker threads will be scheduled 396 * to process queued blockgc work. If not, inodes retain their preallocations 397 * until explicitly deleted. 398 */ 399 #define XFS_OPSTATE_BLOCKGC_ENABLED 6 400 401 /* Kernel has logged a warning about online fsck being used on this fs. */ 402 #define XFS_OPSTATE_WARNED_SCRUB 7 403 /* Kernel has logged a warning about shrink being used on this fs. */ 404 #define XFS_OPSTATE_WARNED_SHRINK 8 405 /* Kernel has logged a warning about logged xattr updates being used. */ 406 #define XFS_OPSTATE_WARNED_LARP 9 407 408 #define __XFS_IS_OPSTATE(name, NAME) \ 409 static inline bool xfs_is_ ## name (struct xfs_mount *mp) \ 410 { \ 411 return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ 412 } \ 413 static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \ 414 { \ 415 return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ 416 } \ 417 static inline bool xfs_set_ ## name (struct xfs_mount *mp) \ 418 { \ 419 return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ 420 } 421 422 __XFS_IS_OPSTATE(unmounting, UNMOUNTING) 423 __XFS_IS_OPSTATE(clean, CLEAN) 424 __XFS_IS_OPSTATE(shutdown, SHUTDOWN) 425 __XFS_IS_OPSTATE(inode32, INODE32) 426 __XFS_IS_OPSTATE(readonly, READONLY) 427 __XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED) 428 __XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED) 429 430 static inline bool 431 xfs_should_warn(struct xfs_mount *mp, long nr) 432 { 433 return !test_and_set_bit(nr, &mp->m_opstate); 434 } 435 436 #define XFS_OPSTATE_STRINGS \ 437 { (1UL << XFS_OPSTATE_UNMOUNTING), "unmounting" }, \ 438 { (1UL << XFS_OPSTATE_CLEAN), "clean" }, \ 439 { (1UL << XFS_OPSTATE_SHUTDOWN), "shutdown" }, \ 440 { (1UL << XFS_OPSTATE_INODE32), "inode32" }, \ 441 { (1UL << XFS_OPSTATE_READONLY), "read_only" }, \ 442 { (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }, \ 443 { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED), "blockgc" }, \ 444 { (1UL << XFS_OPSTATE_WARNED_SCRUB), "wscrub" }, \ 445 { (1UL << XFS_OPSTATE_WARNED_SHRINK), "wshrink" }, \ 446 { (1UL << XFS_OPSTATE_WARNED_LARP), "wlarp" } 447 448 /* 449 * Max and min values for mount-option defined I/O 450 * preallocation sizes. 451 */ 452 #define XFS_MAX_IO_LOG 30 /* 1G */ 453 #define XFS_MIN_IO_LOG PAGE_SHIFT 454 455 void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname, 456 int lnnum); 457 #define xfs_force_shutdown(m,f) \ 458 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 459 460 #define SHUTDOWN_META_IO_ERROR (1u << 0) /* write attempt to metadata failed */ 461 #define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */ 462 #define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */ 463 #define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */ 464 #define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */ 465 #define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */ 466 467 #define XFS_SHUTDOWN_STRINGS \ 468 { SHUTDOWN_META_IO_ERROR, "metadata_io" }, \ 469 { SHUTDOWN_LOG_IO_ERROR, "log_io" }, \ 470 { SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \ 471 { SHUTDOWN_CORRUPT_INCORE, "corruption" }, \ 472 { SHUTDOWN_DEVICE_REMOVED, "device_removed" } 473 474 /* 475 * Flags for xfs_mountfs 476 */ 477 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 478 479 static inline xfs_agnumber_t 480 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 481 { 482 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 483 do_div(ld, mp->m_sb.sb_agblocks); 484 return (xfs_agnumber_t) ld; 485 } 486 487 static inline xfs_agblock_t 488 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 489 { 490 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 491 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 492 } 493 494 int xfs_buf_hash_init(struct xfs_perag *pag); 495 void xfs_buf_hash_destroy(struct xfs_perag *pag); 496 497 extern void xfs_uuid_table_free(void); 498 extern uint64_t xfs_default_resblks(xfs_mount_t *mp); 499 extern int xfs_mountfs(xfs_mount_t *mp); 500 extern void xfs_unmountfs(xfs_mount_t *); 501 502 /* 503 * Deltas for the block count can vary from 1 to very large, but lock contention 504 * only occurs on frequent small block count updates such as in the delayed 505 * allocation path for buffered writes (page a time updates). Hence we set 506 * a large batch count (1024) to minimise global counter updates except when 507 * we get near to ENOSPC and we have to be very accurate with our updates. 508 */ 509 #define XFS_FDBLOCKS_BATCH 1024 510 511 /* 512 * Estimate the amount of free space that is not available to userspace and is 513 * not explicitly reserved from the incore fdblocks. This includes: 514 * 515 * - The minimum number of blocks needed to support splitting a bmap btree 516 * - The blocks currently in use by the freespace btrees because they record 517 * the actual blocks that will fill per-AG metadata space reservations 518 */ 519 static inline uint64_t 520 xfs_fdblocks_unavailable( 521 struct xfs_mount *mp) 522 { 523 return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks); 524 } 525 526 int xfs_mod_freecounter(struct xfs_mount *mp, struct percpu_counter *counter, 527 int64_t delta, bool rsvd); 528 529 static inline int 530 xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, bool reserved) 531 { 532 return xfs_mod_freecounter(mp, &mp->m_fdblocks, delta, reserved); 533 } 534 535 static inline int 536 xfs_mod_frextents(struct xfs_mount *mp, int64_t delta) 537 { 538 return xfs_mod_freecounter(mp, &mp->m_frextents, delta, false); 539 } 540 541 extern int xfs_readsb(xfs_mount_t *, int); 542 extern void xfs_freesb(xfs_mount_t *); 543 extern bool xfs_fs_writable(struct xfs_mount *mp, int level); 544 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t); 545 546 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 547 548 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 549 550 int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, 551 xfs_off_t count_fsb); 552 553 struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp, 554 int error_class, int error); 555 void xfs_force_summary_recalc(struct xfs_mount *mp); 556 int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature); 557 bool xfs_clear_incompat_log_features(struct xfs_mount *mp); 558 void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta); 559 560 #endif /* __XFS_MOUNT_H__ */ 561