fs/xfs/xfs_mount.h

   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  * 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  */
  83 typedef 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 maximum i for which
 105          * rsum[i][bbno] != 0, or 0 if rsum[i][bbno] == 0 for all i.
 106          * Reads and writes are serialized by the rsumip 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         int8_t                  m_rtxblklog;    /* log2 of rextsize, if possible */
 123         uint                    m_blockmask;    /* sb_blocksize-1 */
 124         uint                    m_blockwsize;   /* sb_blocksize in words */
 125         uint                    m_blockwmask;   /* blockwsize-1 */
 126         uint                    m_alloc_mxr[2]; /* max alloc btree records */
 127         uint                    m_alloc_mnr[2]; /* min alloc btree records */
 128         uint                    m_bmap_dmxr[2]; /* max bmap btree records */
 129         uint                    m_bmap_dmnr[2]; /* min bmap btree records */
 130         uint                    m_rmap_mxr[2];  /* max rmap btree records */
 131         uint                    m_rmap_mnr[2];  /* min rmap btree records */
 132         uint                    m_refc_mxr[2];  /* max refc btree records */
 133         uint                    m_refc_mnr[2];  /* min refc btree records */
 134         uint                    m_alloc_maxlevels; /* max alloc btree levels */
 135         uint                    m_bm_maxlevels[2]; /* max bmap btree levels */
 136         uint                    m_rmap_maxlevels; /* max rmap btree levels */
 137         uint                    m_refc_maxlevels; /* max refcount btree level */
 138         unsigned int            m_agbtree_maxlevels; /* max level of all AG btrees */
 139         xfs_extlen_t            m_ag_prealloc_blocks; /* reserved ag blocks */
 140         uint                    m_alloc_set_aside; /* space we can't use */
 141         uint                    m_ag_max_usable; /* max space per AG */
 142         int                     m_dalign;       /* stripe unit */
 143         int                     m_swidth;       /* stripe width */
 144         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 145         uint                    m_allocsize_log;/* min write size log bytes */
 146         uint                    m_allocsize_blocks; /* min write size blocks */
 147         int                     m_logbufs;      /* number of log buffers */
 148         int                     m_logbsize;     /* size of each log buffer */
 149         uint                    m_rsumlevels;   /* rt summary levels */
 150         uint                    m_rsumsize;     /* size of rt summary, bytes */
 151         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 152         uint                    m_qflags;       /* quota status flags */
 153         uint64_t                m_features;     /* active filesystem features */
 154         uint64_t                m_low_space[XFS_LOWSP_MAX];
 155         uint64_t                m_low_rtexts[XFS_LOWSP_MAX];
 156         uint64_t                m_rtxblkmask;   /* rt extent block mask */
 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
 253         /* cpus that have inodes queued for inactivation */
 254         struct cpumask          m_inodegc_cpumask;
 255 } xfs_mount_t;
 256
 257 #define M_IGEO(mp)              (&(mp)->m_ino_geo)
 258
 259 /*
 260  * Flags for m_features.
 261  *
 262  * These are all the active features in the filesystem, regardless of how
 263  * they are configured.
 264  */
 265 #define XFS_FEAT_ATTR           (1ULL << 0)     /* xattrs present in fs */
 266 #define XFS_FEAT_NLINK          (1ULL << 1)     /* 32 bit link counts */
 267 #define XFS_FEAT_QUOTA          (1ULL << 2)     /* quota active */
 268 #define XFS_FEAT_ALIGN          (1ULL << 3)     /* inode alignment */
 269 #define XFS_FEAT_DALIGN         (1ULL << 4)     /* data alignment */
 270 #define XFS_FEAT_LOGV2          (1ULL << 5)     /* version 2 logs */
 271 #define XFS_FEAT_SECTOR         (1ULL << 6)     /* sector size > 512 bytes */
 272 #define XFS_FEAT_EXTFLG         (1ULL << 7)     /* unwritten extents */
 273 #define XFS_FEAT_ASCIICI        (1ULL << 8)     /* ASCII only case-insens. */
 274 #define XFS_FEAT_LAZYSBCOUNT    (1ULL << 9)     /* Superblk counters */
 275 #define XFS_FEAT_ATTR2          (1ULL << 10)    /* dynamic attr fork */
 276 #define XFS_FEAT_PARENT         (1ULL << 11)    /* parent pointers */
 277 #define XFS_FEAT_PROJID32       (1ULL << 12)    /* 32 bit project id */
 278 #define XFS_FEAT_CRC            (1ULL << 13)    /* metadata CRCs */
 279 #define XFS_FEAT_V3INODES       (1ULL << 14)    /* Version 3 inodes */
 280 #define XFS_FEAT_PQUOTINO       (1ULL << 15)    /* non-shared proj/grp quotas */
 281 #define XFS_FEAT_FTYPE          (1ULL << 16)    /* inode type in dir */
 282 #define XFS_FEAT_FINOBT         (1ULL << 17)    /* free inode btree */
 283 #define XFS_FEAT_RMAPBT         (1ULL << 18)    /* reverse map btree */
 284 #define XFS_FEAT_REFLINK        (1ULL << 19)    /* reflinked files */
 285 #define XFS_FEAT_SPINODES       (1ULL << 20)    /* sparse inode chunks */
 286 #define XFS_FEAT_META_UUID      (1ULL << 21)    /* metadata UUID */
 287 #define XFS_FEAT_REALTIME       (1ULL << 22)    /* realtime device present */
 288 #define XFS_FEAT_INOBTCNT       (1ULL << 23)    /* inobt block counts */
 289 #define XFS_FEAT_BIGTIME        (1ULL << 24)    /* large timestamps */
 290 #define XFS_FEAT_NEEDSREPAIR    (1ULL << 25)    /* needs xfs_repair */
 291 #define XFS_FEAT_NREXT64        (1ULL << 26)    /* large extent counters */
 292
 293 /* Mount features */
 294 #define XFS_FEAT_NOATTR2        (1ULL << 48)    /* disable attr2 creation */
 295 #define XFS_FEAT_NOALIGN        (1ULL << 49)    /* ignore alignment */
 296 #define XFS_FEAT_ALLOCSIZE      (1ULL << 50)    /* user specified allocation size */
 297 #define XFS_FEAT_LARGE_IOSIZE   (1ULL << 51)    /* report large preferred
 298                                                  * I/O size in stat() */
 299 #define XFS_FEAT_WSYNC          (1ULL << 52)    /* synchronous metadata ops */
 300 #define XFS_FEAT_DIRSYNC        (1ULL << 53)    /* synchronous directory ops */
 301 #define XFS_FEAT_DISCARD        (1ULL << 54)    /* discard unused blocks */
 302 #define XFS_FEAT_GRPID          (1ULL << 55)    /* group-ID assigned from directory */
 303 #define XFS_FEAT_SMALL_INUMS    (1ULL << 56)    /* user wants 32bit inodes */
 304 #define XFS_FEAT_IKEEP          (1ULL << 57)    /* keep empty inode clusters*/
 305 #define XFS_FEAT_SWALLOC        (1ULL << 58)    /* stripe width allocation */
 306 #define XFS_FEAT_FILESTREAMS    (1ULL << 59)    /* use filestreams allocator */
 307 #define XFS_FEAT_DAX_ALWAYS     (1ULL << 60)    /* DAX always enabled */
 308 #define XFS_FEAT_DAX_NEVER      (1ULL << 61)    /* DAX never enabled */
 309 #define XFS_FEAT_NORECOVERY     (1ULL << 62)    /* no recovery - dirty fs */
 310 #define XFS_FEAT_NOUUID         (1ULL << 63)    /* ignore uuid during mount */
 311
 312 #define __XFS_HAS_FEAT(name, NAME) \
 313 static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
 314 { \
 315         return mp->m_features & XFS_FEAT_ ## NAME; \
 316 }
 317
 318 /* Some features can be added dynamically so they need a set wrapper, too. */
 319 #define __XFS_ADD_FEAT(name, NAME) \
 320         __XFS_HAS_FEAT(name, NAME); \
 321 static inline void xfs_add_ ## name (struct xfs_mount *mp) \
 322 { \
 323         mp->m_features |= XFS_FEAT_ ## NAME; \
 324         xfs_sb_version_add ## name(&mp->m_sb); \
 325 }
 326
 327 /* Superblock features */
 328 __XFS_ADD_FEAT(attr, ATTR)
 329 __XFS_HAS_FEAT(nlink, NLINK)
 330 __XFS_ADD_FEAT(quota, QUOTA)
 331 __XFS_HAS_FEAT(align, ALIGN)
 332 __XFS_HAS_FEAT(dalign, DALIGN)
 333 __XFS_HAS_FEAT(logv2, LOGV2)
 334 __XFS_HAS_FEAT(sector, SECTOR)
 335 __XFS_HAS_FEAT(extflg, EXTFLG)
 336 __XFS_HAS_FEAT(asciici, ASCIICI)
 337 __XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT)
 338 __XFS_ADD_FEAT(attr2, ATTR2)
 339 __XFS_HAS_FEAT(parent, PARENT)
 340 __XFS_ADD_FEAT(projid32, PROJID32)
 341 __XFS_HAS_FEAT(crc, CRC)
 342 __XFS_HAS_FEAT(v3inodes, V3INODES)
 343 __XFS_HAS_FEAT(pquotino, PQUOTINO)
 344 __XFS_HAS_FEAT(ftype, FTYPE)
 345 __XFS_HAS_FEAT(finobt, FINOBT)
 346 __XFS_HAS_FEAT(rmapbt, RMAPBT)
 347 __XFS_HAS_FEAT(reflink, REFLINK)
 348 __XFS_HAS_FEAT(sparseinodes, SPINODES)
 349 __XFS_HAS_FEAT(metauuid, META_UUID)
 350 __XFS_HAS_FEAT(realtime, REALTIME)
 351 __XFS_HAS_FEAT(inobtcounts, INOBTCNT)
 352 __XFS_HAS_FEAT(bigtime, BIGTIME)
 353 __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
 354 __XFS_HAS_FEAT(large_extent_counts, NREXT64)
 355
 356 /*
 357  * Mount features
 358  *
 359  * These do not change dynamically - features that can come and go, such as 32
 360  * bit inodes and read-only state, are kept as operational state rather than
 361  * features.
 362  */
 363 __XFS_HAS_FEAT(noattr2, NOATTR2)
 364 __XFS_HAS_FEAT(noalign, NOALIGN)
 365 __XFS_HAS_FEAT(allocsize, ALLOCSIZE)
 366 __XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE)
 367 __XFS_HAS_FEAT(wsync, WSYNC)
 368 __XFS_HAS_FEAT(dirsync, DIRSYNC)
 369 __XFS_HAS_FEAT(discard, DISCARD)
 370 __XFS_HAS_FEAT(grpid, GRPID)
 371 __XFS_HAS_FEAT(small_inums, SMALL_INUMS)
 372 __XFS_HAS_FEAT(ikeep, IKEEP)
 373 __XFS_HAS_FEAT(swalloc, SWALLOC)
 374 __XFS_HAS_FEAT(filestreams, FILESTREAMS)
 375 __XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
 376 __XFS_HAS_FEAT(dax_never, DAX_NEVER)
 377 __XFS_HAS_FEAT(norecovery, NORECOVERY)
 378 __XFS_HAS_FEAT(nouuid, NOUUID)
 379
 380 /*
 381  * Operational mount state flags
 382  *
 383  * Use these with atomic bit ops only!
 384  */
 385 #define XFS_OPSTATE_UNMOUNTING          0       /* filesystem is unmounting */
 386 #define XFS_OPSTATE_CLEAN               1       /* mount was clean */
 387 #define XFS_OPSTATE_SHUTDOWN            2       /* stop all fs operations */
 388 #define XFS_OPSTATE_INODE32             3       /* inode32 allocator active */
 389 #define XFS_OPSTATE_READONLY            4       /* read-only fs */
 390
 391 /*
 392  * If set, inactivation worker threads will be scheduled to process queued
 393  * inodegc work.  If not, queued inodes remain in memory waiting to be
 394  * processed.
 395  */
 396 #define XFS_OPSTATE_INODEGC_ENABLED     5
 397 /*
 398  * If set, background speculative prealloc gc worker threads will be scheduled
 399  * to process queued blockgc work.  If not, inodes retain their preallocations
 400  * until explicitly deleted.
 401  */
 402 #define XFS_OPSTATE_BLOCKGC_ENABLED     6
 403
 404 /* Kernel has logged a warning about online fsck being used on this fs. */
 405 #define XFS_OPSTATE_WARNED_SCRUB        7
 406 /* Kernel has logged a warning about shrink being used on this fs. */
 407 #define XFS_OPSTATE_WARNED_SHRINK       8
 408 /* Kernel has logged a warning about logged xattr updates being used. */
 409 #define XFS_OPSTATE_WARNED_LARP         9
 410 /* Mount time quotacheck is running */
 411 #define XFS_OPSTATE_QUOTACHECK_RUNNING  10
 412
 413 #define __XFS_IS_OPSTATE(name, NAME) \
 414 static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
 415 { \
 416         return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
 417 } \
 418 static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
 419 { \
 420         return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
 421 } \
 422 static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
 423 { \
 424         return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
 425 }
 426
 427 __XFS_IS_OPSTATE(unmounting, UNMOUNTING)
 428 __XFS_IS_OPSTATE(clean, CLEAN)
 429 __XFS_IS_OPSTATE(shutdown, SHUTDOWN)
 430 __XFS_IS_OPSTATE(inode32, INODE32)
 431 __XFS_IS_OPSTATE(readonly, READONLY)
 432 __XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
 433 __XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED)
 434 #ifdef CONFIG_XFS_QUOTA
 435 __XFS_IS_OPSTATE(quotacheck_running, QUOTACHECK_RUNNING)
 436 #else
 437 # define xfs_is_quotacheck_running(mp)  (false)
 438 #endif
 439
 440 static inline bool
 441 xfs_should_warn(struct xfs_mount *mp, long nr)
 442 {
 443         return !test_and_set_bit(nr, &mp->m_opstate);
 444 }
 445
 446 #define XFS_OPSTATE_STRINGS \
 447         { (1UL << XFS_OPSTATE_UNMOUNTING),              "unmounting" }, \
 448         { (1UL << XFS_OPSTATE_CLEAN),                   "clean" }, \
 449         { (1UL << XFS_OPSTATE_SHUTDOWN),                "shutdown" }, \
 450         { (1UL << XFS_OPSTATE_INODE32),                 "inode32" }, \
 451         { (1UL << XFS_OPSTATE_READONLY),                "read_only" }, \
 452         { (1UL << XFS_OPSTATE_INODEGC_ENABLED),         "inodegc" }, \
 453         { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED),         "blockgc" }, \
 454         { (1UL << XFS_OPSTATE_WARNED_SCRUB),            "wscrub" }, \
 455         { (1UL << XFS_OPSTATE_WARNED_SHRINK),           "wshrink" }, \
 456         { (1UL << XFS_OPSTATE_WARNED_LARP),             "wlarp" }, \
 457         { (1UL << XFS_OPSTATE_QUOTACHECK_RUNNING),      "quotacheck" }
 458
 459 /*
 460  * Max and min values for mount-option defined I/O
 461  * preallocation sizes.
 462  */
 463 #define XFS_MAX_IO_LOG          30      /* 1G */
 464 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 465
 466 void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
 467                 int lnnum);
 468 #define xfs_force_shutdown(m,f) \
 469         xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
 470
 471 #define SHUTDOWN_META_IO_ERROR  (1u << 0) /* write attempt to metadata failed */
 472 #define SHUTDOWN_LOG_IO_ERROR   (1u << 1) /* write attempt to the log failed */
 473 #define SHUTDOWN_FORCE_UMOUNT   (1u << 2) /* shutdown from a forced unmount */
 474 #define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */
 475 #define SHUTDOWN_CORRUPT_ONDISK (1u << 4)  /* corrupt metadata on device */
 476 #define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */
 477
 478 #define XFS_SHUTDOWN_STRINGS \
 479         { SHUTDOWN_META_IO_ERROR,       "metadata_io" }, \
 480         { SHUTDOWN_LOG_IO_ERROR,        "log_io" }, \
 481         { SHUTDOWN_FORCE_UMOUNT,        "force_umount" }, \
 482         { SHUTDOWN_CORRUPT_INCORE,      "corruption" }, \
 483         { SHUTDOWN_DEVICE_REMOVED,      "device_removed" }
 484
 485 /*
 486  * Flags for xfs_mountfs
 487  */
 488 #define XFS_MFSI_QUIET          0x40    /* Be silent if mount errors found */
 489
 490 static inline xfs_agnumber_t
 491 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
 492 {
 493         xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
 494         do_div(ld, mp->m_sb.sb_agblocks);
 495         return (xfs_agnumber_t) ld;
 496 }
 497
 498 static inline xfs_agblock_t
 499 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 500 {
 501         xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
 502         return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
 503 }
 504
 505 int xfs_buf_hash_init(struct xfs_perag *pag);
 506 void xfs_buf_hash_destroy(struct xfs_perag *pag);
 507
 508 extern void     xfs_uuid_table_free(void);
 509 extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
 510 extern int      xfs_mountfs(xfs_mount_t *mp);
 511 extern void     xfs_unmountfs(xfs_mount_t *);
 512
 513 /*
 514  * Deltas for the block count can vary from 1 to very large, but lock contention
 515  * only occurs on frequent small block count updates such as in the delayed
 516  * allocation path for buffered writes (page a time updates). Hence we set
 517  * a large batch count (1024) to minimise global counter updates except when
 518  * we get near to ENOSPC and we have to be very accurate with our updates.
 519  */
 520 #define XFS_FDBLOCKS_BATCH      1024
 521
 522 /*
 523  * Estimate the amount of free space that is not available to userspace and is
 524  * not explicitly reserved from the incore fdblocks.  This includes:
 525  *
 526  * - The minimum number of blocks needed to support splitting a bmap btree
 527  * - The blocks currently in use by the freespace btrees because they record
 528  *   the actual blocks that will fill per-AG metadata space reservations
 529  */
 530 static inline uint64_t
 531 xfs_fdblocks_unavailable(
 532         struct xfs_mount        *mp)
 533 {
 534         return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);
 535 }
 536
 537 int xfs_mod_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
 538                 int64_t delta, bool rsvd);
 539
 540 static inline int
 541 xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, bool reserved)
 542 {
 543         return xfs_mod_freecounter(mp, &mp->m_fdblocks, delta, reserved);
 544 }
 545
 546 static inline int
 547 xfs_mod_frextents(struct xfs_mount *mp, int64_t delta)
 548 {
 549         return xfs_mod_freecounter(mp, &mp->m_frextents, delta, false);
 550 }
 551
 552 extern int      xfs_readsb(xfs_mount_t *, int);
 553 extern void     xfs_freesb(xfs_mount_t *);
 554 extern bool     xfs_fs_writable(struct xfs_mount *mp, int level);
 555 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
 556
 557 extern int      xfs_dev_is_read_only(struct xfs_mount *, char *);
 558
 559 extern void     xfs_set_low_space_thresholds(struct xfs_mount *);
 560
 561 int     xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
 562                         xfs_off_t count_fsb);
 563
 564 struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
 565                 int error_class, int error);
 566 void xfs_force_summary_recalc(struct xfs_mount *mp);
 567 int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
 568 bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
 569 void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
 570
 571 #endif  /* __XFS_MOUNT_H__ */