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 9struct xlog; 10struct xfs_inode; 11struct xfs_mru_cache; 12struct xfs_ail; 13struct xfs_quotainfo; 14struct xfs_da_geometry; 15struct xfs_perag; 16 17/* dynamic preallocation free space thresholds, 5% down to 1% */ 18enum { 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 */ 33enum { 34 XFS_ERR_METADATA, 35 XFS_ERR_CLASS_MAX, 36}; 37enum { 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 */ 53struct 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 */ 62struct xfs_inodegc { 63 struct xfs_mount *mp; 64 struct llist_head list; 65 struct delayed_work work; 66 int error; 67 68 /* approximate count of inodes in the list */ 69 unsigned int items; 70 unsigned int shrinker_hits; 71 unsigned int cpu; 72}; 73 74/* 75 * The struct xfsmount layout is optimised to separate read-mostly variables 76 * from variables that are frequently modified. We put the read-mostly variables 77 * first, then place all the other variables at the end. 78 * 79 * Typically, read-mostly variables are those that are set at mount time and 80 * never changed again, or only change rarely as a result of things like sysfs 81 * knobs being tweaked. 82 */ 83typedef struct xfs_mount { 84 struct xfs_sb m_sb; /* copy of fs superblock */ 85 struct super_block *m_super; 86 struct xfs_ail *m_ail; /* fs active log item list */ 87 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 88 char *m_rtname; /* realtime device name */ 89 char *m_logname; /* external log device name */ 90 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ 91 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ 92 struct xlog *m_log; /* log specific stuff */ 93 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 94 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 95 struct xfs_inode *m_rootip; /* pointer to root directory */ 96 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 97 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 98 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 99 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 100 void __percpu *m_inodegc; /* percpu inodegc structures */ 101 102 /* 103 * Optional cache of rt summary level per bitmap block with the 104 * invariant that m_rsum_cache[bbno] <= the minimum i for which 105 * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip 106 * inode lock. 107 */ 108 uint8_t *m_rsum_cache; 109 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 110 struct workqueue_struct *m_buf_workqueue; 111 struct workqueue_struct *m_unwritten_workqueue; 112 struct workqueue_struct *m_reclaim_workqueue; 113 struct workqueue_struct *m_sync_workqueue; 114 struct workqueue_struct *m_blockgc_wq; 115 struct workqueue_struct *m_inodegc_wq; 116 117 int m_bsize; /* fs logical block size */ 118 uint8_t m_blkbit_log; /* blocklog + NBBY */ 119 uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 120 uint8_t m_agno_log; /* log #ag's */ 121 uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 122 uint m_blockmask; /* sb_blocksize-1 */ 123 uint m_blockwsize; /* sb_blocksize in words */ 124 uint m_blockwmask; /* blockwsize-1 */ 125 uint m_alloc_mxr[2]; /* max alloc btree records */ 126 uint m_alloc_mnr[2]; /* min alloc btree records */ 127 uint m_bmap_dmxr[2]; /* max bmap btree records */ 128 uint m_bmap_dmnr[2]; /* min bmap btree records */ 129 uint m_rmap_mxr[2]; /* max rmap btree records */ 130 uint m_rmap_mnr[2]; /* min rmap btree records */ 131 uint m_refc_mxr[2]; /* max refc btree records */ 132 uint m_refc_mnr[2]; /* min refc btree records */ 133 uint m_alloc_maxlevels; /* max alloc btree levels */ 134 uint m_bm_maxlevels[2]; /* max bmap btree levels */ 135 uint m_rmap_maxlevels; /* max rmap btree levels */ 136 uint m_refc_maxlevels; /* max refcount btree level */ 137 unsigned int m_agbtree_maxlevels; /* max level of all AG btrees */ 138 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */ 139 uint m_alloc_set_aside; /* space we can't use */ 140 uint m_ag_max_usable; /* max space per AG */ 141 int m_dalign; /* stripe unit */ 142 int m_swidth; /* stripe width */ 143 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 144 uint m_allocsize_log;/* min write size log bytes */ 145 uint m_allocsize_blocks; /* min write size blocks */ 146 int m_logbufs; /* number of log buffers */ 147 int m_logbsize; /* size of each log buffer */ 148 uint m_rsumlevels; /* rt summary levels */ 149 uint m_rsumsize; /* size of rt summary, bytes */ 150 int m_fixedfsid[2]; /* unchanged for life of FS */ 151 uint m_qflags; /* quota status flags */ 152 uint64_t m_features; /* active filesystem features */ 153 uint64_t m_low_space[XFS_LOWSP_MAX]; 154 uint64_t m_low_rtexts[XFS_LOWSP_MAX]; 155 struct xfs_ino_geometry m_ino_geo; /* inode geometry */ 156 struct xfs_trans_resv m_resv; /* precomputed res values */ 157 /* low free space thresholds */ 158 unsigned long m_opstate; /* dynamic state flags */ 159 bool m_always_cow; 160 bool m_fail_unmount; 161 bool m_finobt_nores; /* no per-AG finobt resv. */ 162 bool m_update_sb; /* sb needs update in mount */ 163 164 /* 165 * Bitsets of per-fs metadata that have been checked and/or are sick. 166 * Callers must hold m_sb_lock to access these two fields. 167 */ 168 uint8_t m_fs_checked; 169 uint8_t m_fs_sick; 170 /* 171 * Bitsets of rt metadata that have been checked and/or are sick. 172 * Callers must hold m_sb_lock to access this field. 173 */ 174 uint8_t m_rt_checked; 175 uint8_t m_rt_sick; 176 177 /* 178 * End of read-mostly variables. Frequently written variables and locks 179 * should be placed below this comment from now on. The first variable 180 * here is marked as cacheline aligned so they it is separated from 181 * the read-mostly variables. 182 */ 183 184 spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */ 185 struct percpu_counter m_icount; /* allocated inodes counter */ 186 struct percpu_counter m_ifree; /* free inodes counter */ 187 struct percpu_counter m_fdblocks; /* free block counter */ 188 struct percpu_counter m_frextents; /* free rt extent counter */ 189 190 /* 191 * Count of data device blocks reserved for delayed allocations, 192 * including indlen blocks. Does not include allocated CoW staging 193 * extents or anything related to the rt device. 194 */ 195 struct percpu_counter m_delalloc_blks; 196 /* 197 * Global count of allocation btree blocks in use across all AGs. Only 198 * used when perag reservation is enabled. Helps prevent block 199 * reservation from attempting to reserve allocation btree blocks. 200 */ 201 atomic64_t m_allocbt_blks; 202 203 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 204 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 205 uint64_t m_resblks; /* total reserved blocks */ 206 uint64_t m_resblks_avail;/* available reserved blocks */ 207 uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 208 struct delayed_work m_reclaim_work; /* background inode reclaim */ 209 struct dentry *m_debugfs; /* debugfs parent */ 210 struct xfs_kobj m_kobj; 211 struct xfs_kobj m_error_kobj; 212 struct xfs_kobj m_error_meta_kobj; 213 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX]; 214 struct xstats m_stats; /* per-fs stats */ 215#ifdef CONFIG_XFS_ONLINE_SCRUB_STATS 216 struct xchk_stats *m_scrub_stats; 217#endif 218 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 219 atomic_t m_agirotor; /* last ag dir inode alloced */ 220 221 /* Memory shrinker to throttle and reprioritize inodegc */ 222 struct shrinker m_inodegc_shrinker; 223 /* 224 * Workqueue item so that we can coalesce multiple inode flush attempts 225 * into a single flush. 226 */ 227 struct work_struct m_flush_inodes_work; 228 229 /* 230 * Generation of the filesysyem layout. This is incremented by each 231 * growfs, and used by the pNFS server to ensure the client updates 232 * its view of the block device once it gets a layout that might 233 * reference the newly added blocks. Does not need to be persistent 234 * as long as we only allow file system size increments, but if we 235 * ever support shrinks it would have to be persisted in addition 236 * to various other kinds of pain inflicted on the pNFS server. 237 */ 238 uint32_t m_generation; 239 struct mutex m_growlock; /* growfs mutex */ 240 241#ifdef DEBUG 242 /* 243 * Frequency with which errors are injected. Replaces xfs_etest; the 244 * value stored in here is the inverse of the frequency with which the 245 * error triggers. 1 = always, 2 = half the time, etc. 246 */ 247 unsigned int *m_errortag; 248 struct xfs_kobj m_errortag_kobj; 249#endif 250 251 /* cpus that have inodes queued for inactivation */ 252 struct cpumask m_inodegc_cpumask; 253} xfs_mount_t; 254 255#define M_IGEO(mp) (&(mp)->m_ino_geo) 256 257/* 258 * Flags for m_features. 259 * 260 * These are all the active features in the filesystem, regardless of how 261 * they are configured. 262 */ 263#define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */ 264#define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */ 265#define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */ 266#define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */ 267#define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */ 268#define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */ 269#define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */ 270#define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */ 271#define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */ 272#define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */ 273#define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */ 274#define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */ 275#define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */ 276#define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */ 277#define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */ 278#define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */ 279#define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */ 280#define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */ 281#define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */ 282#define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */ 283#define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */ 284#define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */ 285#define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */ 286#define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */ 287#define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */ 288#define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */ 289#define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */ 290 291/* Mount features */ 292#define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */ 293#define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */ 294#define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */ 295#define XFS_FEAT_LARGE_IOSIZE (1ULL << 51) /* report large preferred 296 * I/O size in stat() */ 297#define XFS_FEAT_WSYNC (1ULL << 52) /* synchronous metadata ops */ 298#define XFS_FEAT_DIRSYNC (1ULL << 53) /* synchronous directory ops */ 299#define XFS_FEAT_DISCARD (1ULL << 54) /* discard unused blocks */ 300#define XFS_FEAT_GRPID (1ULL << 55) /* group-ID assigned from directory */ 301#define XFS_FEAT_SMALL_INUMS (1ULL << 56) /* user wants 32bit inodes */ 302#define XFS_FEAT_IKEEP (1ULL << 57) /* keep empty inode clusters*/ 303#define XFS_FEAT_SWALLOC (1ULL << 58) /* stripe width allocation */ 304#define XFS_FEAT_FILESTREAMS (1ULL << 59) /* use filestreams allocator */ 305#define XFS_FEAT_DAX_ALWAYS (1ULL << 60) /* DAX always enabled */ 306#define XFS_FEAT_DAX_NEVER (1ULL << 61) /* DAX never enabled */ 307#define XFS_FEAT_NORECOVERY (1ULL << 62) /* no recovery - dirty fs */ 308#define XFS_FEAT_NOUUID (1ULL << 63) /* ignore uuid during mount */ 309 310#define __XFS_HAS_FEAT(name, NAME) \ 311static inline bool xfs_has_ ## name (struct xfs_mount *mp) \ 312{ \ 313 return mp->m_features & XFS_FEAT_ ## NAME; \ 314} 315 316/* Some features can be added dynamically so they need a set wrapper, too. */ 317#define __XFS_ADD_FEAT(name, NAME) \ 318 __XFS_HAS_FEAT(name, NAME); \ 319static inline void xfs_add_ ## name (struct xfs_mount *mp) \ 320{ \ 321 mp->m_features |= XFS_FEAT_ ## NAME; \ 322 xfs_sb_version_add ## name(&mp->m_sb); \ 323} 324 325/* Superblock features */ 326__XFS_ADD_FEAT(attr, ATTR) 327__XFS_HAS_FEAT(nlink, NLINK) 328__XFS_ADD_FEAT(quota, QUOTA) 329__XFS_HAS_FEAT(align, ALIGN) 330__XFS_HAS_FEAT(dalign, DALIGN) 331__XFS_HAS_FEAT(logv2, LOGV2) 332__XFS_HAS_FEAT(sector, SECTOR) 333__XFS_HAS_FEAT(extflg, EXTFLG) 334__XFS_HAS_FEAT(asciici, ASCIICI) 335__XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT) 336__XFS_ADD_FEAT(attr2, ATTR2) 337__XFS_HAS_FEAT(parent, PARENT) 338__XFS_ADD_FEAT(projid32, PROJID32) 339__XFS_HAS_FEAT(crc, CRC) 340__XFS_HAS_FEAT(v3inodes, V3INODES) 341__XFS_HAS_FEAT(pquotino, PQUOTINO) 342__XFS_HAS_FEAT(ftype, FTYPE) 343__XFS_HAS_FEAT(finobt, FINOBT) 344__XFS_HAS_FEAT(rmapbt, RMAPBT) 345__XFS_HAS_FEAT(reflink, REFLINK) 346__XFS_HAS_FEAT(sparseinodes, SPINODES) 347__XFS_HAS_FEAT(metauuid, META_UUID) 348__XFS_HAS_FEAT(realtime, REALTIME) 349__XFS_HAS_FEAT(inobtcounts, INOBTCNT) 350__XFS_HAS_FEAT(bigtime, BIGTIME) 351__XFS_HAS_FEAT(needsrepair, NEEDSREPAIR) 352__XFS_HAS_FEAT(large_extent_counts, NREXT64) 353 354/* 355 * Mount features 356 * 357 * These do not change dynamically - features that can come and go, such as 32 358 * bit inodes and read-only state, are kept as operational state rather than 359 * features. 360 */ 361__XFS_HAS_FEAT(noattr2, NOATTR2) 362__XFS_HAS_FEAT(noalign, NOALIGN) 363__XFS_HAS_FEAT(allocsize, ALLOCSIZE) 364__XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE) 365__XFS_HAS_FEAT(wsync, WSYNC) 366__XFS_HAS_FEAT(dirsync, DIRSYNC) 367__XFS_HAS_FEAT(discard, DISCARD) 368__XFS_HAS_FEAT(grpid, GRPID) 369__XFS_HAS_FEAT(small_inums, SMALL_INUMS) 370__XFS_HAS_FEAT(ikeep, IKEEP) 371__XFS_HAS_FEAT(swalloc, SWALLOC) 372__XFS_HAS_FEAT(filestreams, FILESTREAMS) 373__XFS_HAS_FEAT(dax_always, DAX_ALWAYS) 374__XFS_HAS_FEAT(dax_never, DAX_NEVER) 375__XFS_HAS_FEAT(norecovery, NORECOVERY) 376__XFS_HAS_FEAT(nouuid, NOUUID) 377 378/* 379 * Operational mount state flags 380 * 381 * Use these with atomic bit ops only! 382 */ 383#define XFS_OPSTATE_UNMOUNTING 0 /* filesystem is unmounting */ 384#define XFS_OPSTATE_CLEAN 1 /* mount was clean */ 385#define XFS_OPSTATE_SHUTDOWN 2 /* stop all fs operations */ 386#define XFS_OPSTATE_INODE32 3 /* inode32 allocator active */ 387#define XFS_OPSTATE_READONLY 4 /* read-only fs */ 388 389/* 390 * If set, inactivation worker threads will be scheduled to process queued 391 * inodegc work. If not, queued inodes remain in memory waiting to be 392 * processed. 393 */ 394#define XFS_OPSTATE_INODEGC_ENABLED 5 395/* 396 * If set, background speculative prealloc gc worker threads will be scheduled 397 * to process queued blockgc work. If not, inodes retain their preallocations 398 * until explicitly deleted. 399 */ 400#define XFS_OPSTATE_BLOCKGC_ENABLED 6 401 402/* Kernel has logged a warning about online fsck being used on this fs. */ 403#define XFS_OPSTATE_WARNED_SCRUB 7 404/* Kernel has logged a warning about shrink being used on this fs. */ 405#define XFS_OPSTATE_WARNED_SHRINK 8 406/* Kernel has logged a warning about logged xattr updates being used. */ 407#define XFS_OPSTATE_WARNED_LARP 9 408/* Mount time quotacheck is running */ 409#define XFS_OPSTATE_QUOTACHECK_RUNNING 10 410 411#define __XFS_IS_OPSTATE(name, NAME) \ 412static inline bool xfs_is_ ## name (struct xfs_mount *mp) \ 413{ \ 414 return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ 415} \ 416static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \ 417{ \ 418 return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ 419} \ 420static inline bool xfs_set_ ## name (struct xfs_mount *mp) \ 421{ \ 422 return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ 423} 424 425__XFS_IS_OPSTATE(unmounting, UNMOUNTING) 426__XFS_IS_OPSTATE(clean, CLEAN) 427__XFS_IS_OPSTATE(shutdown, SHUTDOWN) 428__XFS_IS_OPSTATE(inode32, INODE32) 429__XFS_IS_OPSTATE(readonly, READONLY) 430__XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED) 431__XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED) 432#ifdef CONFIG_XFS_QUOTA 433__XFS_IS_OPSTATE(quotacheck_running, QUOTACHECK_RUNNING) 434#else 435# define xfs_is_quotacheck_running(mp) (false) 436#endif 437 438static inline bool 439xfs_should_warn(struct xfs_mount *mp, long nr) 440{ 441 return !test_and_set_bit(nr, &mp->m_opstate); 442} 443 444#define XFS_OPSTATE_STRINGS \ 445 { (1UL << XFS_OPSTATE_UNMOUNTING), "unmounting" }, \ 446 { (1UL << XFS_OPSTATE_CLEAN), "clean" }, \ 447 { (1UL << XFS_OPSTATE_SHUTDOWN), "shutdown" }, \ 448 { (1UL << XFS_OPSTATE_INODE32), "inode32" }, \ 449 { (1UL << XFS_OPSTATE_READONLY), "read_only" }, \ 450 { (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }, \ 451 { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED), "blockgc" }, \ 452 { (1UL << XFS_OPSTATE_WARNED_SCRUB), "wscrub" }, \ 453 { (1UL << XFS_OPSTATE_WARNED_SHRINK), "wshrink" }, \ 454 { (1UL << XFS_OPSTATE_WARNED_LARP), "wlarp" }, \ 455 { (1UL << XFS_OPSTATE_QUOTACHECK_RUNNING), "quotacheck" } 456 457/* 458 * Max and min values for mount-option defined I/O 459 * preallocation sizes. 460 */ 461#define XFS_MAX_IO_LOG 30 /* 1G */ 462#define XFS_MIN_IO_LOG PAGE_SHIFT 463 464void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname, 465 int lnnum); 466#define xfs_force_shutdown(m,f) \ 467 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 468 469#define SHUTDOWN_META_IO_ERROR (1u << 0) /* write attempt to metadata failed */ 470#define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */ 471#define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */ 472#define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */ 473#define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */ 474#define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */ 475 476#define XFS_SHUTDOWN_STRINGS \ 477 { SHUTDOWN_META_IO_ERROR, "metadata_io" }, \ 478 { SHUTDOWN_LOG_IO_ERROR, "log_io" }, \ 479 { SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \ 480 { SHUTDOWN_CORRUPT_INCORE, "corruption" }, \ 481 { SHUTDOWN_DEVICE_REMOVED, "device_removed" } 482 483/* 484 * Flags for xfs_mountfs 485 */ 486#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 487 488static inline xfs_agnumber_t 489xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 490{ 491 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 492 do_div(ld, mp->m_sb.sb_agblocks); 493 return (xfs_agnumber_t) ld; 494} 495 496static inline xfs_agblock_t 497xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 498{ 499 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 500 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 501} 502 503int xfs_buf_hash_init(struct xfs_perag *pag); 504void xfs_buf_hash_destroy(struct xfs_perag *pag); 505 506extern void xfs_uuid_table_free(void); 507extern uint64_t xfs_default_resblks(xfs_mount_t *mp); 508extern int xfs_mountfs(xfs_mount_t *mp); 509extern void xfs_unmountfs(xfs_mount_t *); 510 511/* 512 * Deltas for the block count can vary from 1 to very large, but lock contention 513 * only occurs on frequent small block count updates such as in the delayed 514 * allocation path for buffered writes (page a time updates). Hence we set 515 * a large batch count (1024) to minimise global counter updates except when 516 * we get near to ENOSPC and we have to be very accurate with our updates. 517 */ 518#define XFS_FDBLOCKS_BATCH 1024 519 520/* 521 * Estimate the amount of free space that is not available to userspace and is 522 * not explicitly reserved from the incore fdblocks. This includes: 523 * 524 * - The minimum number of blocks needed to support splitting a bmap btree 525 * - The blocks currently in use by the freespace btrees because they record 526 * the actual blocks that will fill per-AG metadata space reservations 527 */ 528static inline uint64_t 529xfs_fdblocks_unavailable( 530 struct xfs_mount *mp) 531{ 532 return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks); 533} 534 535int xfs_mod_freecounter(struct xfs_mount *mp, struct percpu_counter *counter, 536 int64_t delta, bool rsvd); 537 538static inline int 539xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, bool reserved) 540{ 541 return xfs_mod_freecounter(mp, &mp->m_fdblocks, delta, reserved); 542} 543 544static inline int 545xfs_mod_frextents(struct xfs_mount *mp, int64_t delta) 546{ 547 return xfs_mod_freecounter(mp, &mp->m_frextents, delta, false); 548} 549 550extern int xfs_readsb(xfs_mount_t *, int); 551extern void xfs_freesb(xfs_mount_t *); 552extern bool xfs_fs_writable(struct xfs_mount *mp, int level); 553extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t); 554 555extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 556 557extern void xfs_set_low_space_thresholds(struct xfs_mount *); 558 559int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, 560 xfs_off_t count_fsb); 561 562struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp, 563 int error_class, int error); 564void xfs_force_summary_recalc(struct xfs_mount *mp); 565int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature); 566bool xfs_clear_incompat_log_features(struct xfs_mount *mp); 567void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta); 568 569#endif /* __XFS_MOUNT_H__ */ 570