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         struct xfs_buftarg      *m_ddev_targp;  /* data device */
  98         struct xfs_buftarg      *m_logdev_targp;/* log device */
  99         struct xfs_buftarg      *m_rtdev_targp; /* 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         xfs_filblks_t           m_rsumblocks;   /* size of rt summary, FSBs */
 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         /*
 200          * RT version of the above.
 201          */
 202         struct percpu_counter   m_delalloc_rtextents;
 203
 204         /*
 205          * Global count of allocation btree blocks in use across all AGs. Only
 206          * used when perag reservation is enabled. Helps prevent block
 207          * reservation from attempting to reserve allocation btree blocks.
 208          */
 209         atomic64_t              m_allocbt_blks;
 210
 211         struct xarray           m_perags;       /* per-ag accounting info */
 212         uint64_t                m_resblks;      /* total reserved blocks */
 213         uint64_t                m_resblks_avail;/* available reserved blocks */
 214         uint64_t                m_resblks_save; /* reserved blks @ remount,ro */
 215         struct delayed_work     m_reclaim_work; /* background inode reclaim */
 216         struct dentry           *m_debugfs;     /* debugfs parent */
 217         struct xfs_kobj         m_kobj;
 218         struct xfs_kobj         m_error_kobj;
 219         struct xfs_kobj         m_error_meta_kobj;
 220         struct xfs_error_cfg    m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
 221         struct xstats           m_stats;        /* per-fs stats */
 222 #ifdef CONFIG_XFS_ONLINE_SCRUB_STATS
 223         struct xchk_stats       *m_scrub_stats;
 224 #endif
 225         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 226         atomic_t                m_agirotor;     /* last ag dir inode alloced */
 227
 228         /* Memory shrinker to throttle and reprioritize inodegc */
 229         struct shrinker         *m_inodegc_shrinker;
 230         /*
 231          * Workqueue item so that we can coalesce multiple inode flush attempts
 232          * into a single flush.
 233          */
 234         struct work_struct      m_flush_inodes_work;
 235
 236         /*
 237          * Generation of the filesysyem layout.  This is incremented by each
 238          * growfs, and used by the pNFS server to ensure the client updates
 239          * its view of the block device once it gets a layout that might
 240          * reference the newly added blocks.  Does not need to be persistent
 241          * as long as we only allow file system size increments, but if we
 242          * ever support shrinks it would have to be persisted in addition
 243          * to various other kinds of pain inflicted on the pNFS server.
 244          */
 245         uint32_t                m_generation;
 246         struct mutex            m_growlock;     /* growfs mutex */
 247
 248 #ifdef DEBUG
 249         /*
 250          * Frequency with which errors are injected.  Replaces xfs_etest; the
 251          * value stored in here is the inverse of the frequency with which the
 252          * error triggers.  1 = always, 2 = half the time, etc.
 253          */
 254         unsigned int            *m_errortag;
 255         struct xfs_kobj         m_errortag_kobj;
 256 #endif
 257
 258         /* cpus that have inodes queued for inactivation */
 259         struct cpumask          m_inodegc_cpumask;
 260
 261         /* Hook to feed dirent updates to an active online repair. */
 262         struct xfs_hooks        m_dir_update_hooks;
 263 } xfs_mount_t;
 264
 265 #define M_IGEO(mp)              (&(mp)->m_ino_geo)
 266
 267 /*
 268  * Flags for m_features.
 269  *
 270  * These are all the active features in the filesystem, regardless of how
 271  * they are configured.
 272  */
 273 #define XFS_FEAT_ATTR           (1ULL << 0)     /* xattrs present in fs */
 274 #define XFS_FEAT_NLINK          (1ULL << 1)     /* 32 bit link counts */
 275 #define XFS_FEAT_QUOTA          (1ULL << 2)     /* quota active */
 276 #define XFS_FEAT_ALIGN          (1ULL << 3)     /* inode alignment */
 277 #define XFS_FEAT_DALIGN         (1ULL << 4)     /* data alignment */
 278 #define XFS_FEAT_LOGV2          (1ULL << 5)     /* version 2 logs */
 279 #define XFS_FEAT_SECTOR         (1ULL << 6)     /* sector size > 512 bytes */
 280 #define XFS_FEAT_EXTFLG         (1ULL << 7)     /* unwritten extents */
 281 #define XFS_FEAT_ASCIICI        (1ULL << 8)     /* ASCII only case-insens. */
 282 #define XFS_FEAT_LAZYSBCOUNT    (1ULL << 9)     /* Superblk counters */
 283 #define XFS_FEAT_ATTR2          (1ULL << 10)    /* dynamic attr fork */
 284 #define XFS_FEAT_PARENT         (1ULL << 11)    /* parent pointers */
 285 #define XFS_FEAT_PROJID32       (1ULL << 12)    /* 32 bit project id */
 286 #define XFS_FEAT_CRC            (1ULL << 13)    /* metadata CRCs */
 287 #define XFS_FEAT_V3INODES       (1ULL << 14)    /* Version 3 inodes */
 288 #define XFS_FEAT_PQUOTINO       (1ULL << 15)    /* non-shared proj/grp quotas */
 289 #define XFS_FEAT_FTYPE          (1ULL << 16)    /* inode type in dir */
 290 #define XFS_FEAT_FINOBT         (1ULL << 17)    /* free inode btree */
 291 #define XFS_FEAT_RMAPBT         (1ULL << 18)    /* reverse map btree */
 292 #define XFS_FEAT_REFLINK        (1ULL << 19)    /* reflinked files */
 293 #define XFS_FEAT_SPINODES       (1ULL << 20)    /* sparse inode chunks */
 294 #define XFS_FEAT_META_UUID      (1ULL << 21)    /* metadata UUID */
 295 #define XFS_FEAT_REALTIME       (1ULL << 22)    /* realtime device present */
 296 #define XFS_FEAT_INOBTCNT       (1ULL << 23)    /* inobt block counts */
 297 #define XFS_FEAT_BIGTIME        (1ULL << 24)    /* large timestamps */
 298 #define XFS_FEAT_NEEDSREPAIR    (1ULL << 25)    /* needs xfs_repair */
 299 #define XFS_FEAT_NREXT64        (1ULL << 26)    /* large extent counters */
 300 #define XFS_FEAT_EXCHANGE_RANGE (1ULL << 27)    /* exchange range */
 301
 302 /* Mount features */
 303 #define XFS_FEAT_NOATTR2        (1ULL << 48)    /* disable attr2 creation */
 304 #define XFS_FEAT_NOALIGN        (1ULL << 49)    /* ignore alignment */
 305 #define XFS_FEAT_ALLOCSIZE      (1ULL << 50)    /* user specified allocation size */
 306 #define XFS_FEAT_LARGE_IOSIZE   (1ULL << 51)    /* report large preferred
 307                                                  * I/O size in stat() */
 308 #define XFS_FEAT_WSYNC          (1ULL << 52)    /* synchronous metadata ops */
 309 #define XFS_FEAT_DIRSYNC        (1ULL << 53)    /* synchronous directory ops */
 310 #define XFS_FEAT_DISCARD        (1ULL << 54)    /* discard unused blocks */
 311 #define XFS_FEAT_GRPID          (1ULL << 55)    /* group-ID assigned from directory */
 312 #define XFS_FEAT_SMALL_INUMS    (1ULL << 56)    /* user wants 32bit inodes */
 313 #define XFS_FEAT_IKEEP          (1ULL << 57)    /* keep empty inode clusters*/
 314 #define XFS_FEAT_SWALLOC        (1ULL << 58)    /* stripe width allocation */
 315 #define XFS_FEAT_FILESTREAMS    (1ULL << 59)    /* use filestreams allocator */
 316 #define XFS_FEAT_DAX_ALWAYS     (1ULL << 60)    /* DAX always enabled */
 317 #define XFS_FEAT_DAX_NEVER      (1ULL << 61)    /* DAX never enabled */
 318 #define XFS_FEAT_NORECOVERY     (1ULL << 62)    /* no recovery - dirty fs */
 319 #define XFS_FEAT_NOUUID         (1ULL << 63)    /* ignore uuid during mount */
 320
 321 #define __XFS_HAS_FEAT(name, NAME) \
 322 static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
 323 { \
 324         return mp->m_features & XFS_FEAT_ ## NAME; \
 325 }
 326
 327 /* Some features can be added dynamically so they need a set wrapper, too. */
 328 #define __XFS_ADD_FEAT(name, NAME) \
 329         __XFS_HAS_FEAT(name, NAME); \
 330 static inline void xfs_add_ ## name (struct xfs_mount *mp) \
 331 { \
 332         mp->m_features |= XFS_FEAT_ ## NAME; \
 333         xfs_sb_version_add ## name(&mp->m_sb); \
 334 }
 335
 336 /* Superblock features */
 337 __XFS_ADD_FEAT(attr, ATTR)
 338 __XFS_HAS_FEAT(nlink, NLINK)
 339 __XFS_ADD_FEAT(quota, QUOTA)
 340 __XFS_HAS_FEAT(dalign, DALIGN)
 341 __XFS_HAS_FEAT(sector, SECTOR)
 342 __XFS_HAS_FEAT(asciici, ASCIICI)
 343 __XFS_HAS_FEAT(parent, PARENT)
 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 __XFS_HAS_FEAT(exchange_range, EXCHANGE_RANGE)
 356
 357 /*
 358  * Some features are always on for v5 file systems, allow the compiler to
 359  * eliminiate dead code when building without v4 support.
 360  */
 361 #define __XFS_HAS_V4_FEAT(name, NAME) \
 362 static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
 363 { \
 364         return !IS_ENABLED(CONFIG_XFS_SUPPORT_V4) || \
 365                 (mp->m_features & XFS_FEAT_ ## NAME); \
 366 }
 367
 368 #define __XFS_ADD_V4_FEAT(name, NAME) \
 369         __XFS_HAS_V4_FEAT(name, NAME); \
 370 static inline void xfs_add_ ## name (struct xfs_mount *mp) \
 371 { \
 372         if (IS_ENABLED(CONFIG_XFS_SUPPORT_V4)) { \
 373                 mp->m_features |= XFS_FEAT_ ## NAME; \
 374                 xfs_sb_version_add ## name(&mp->m_sb); \
 375         } \
 376 }
 377
 378 __XFS_HAS_V4_FEAT(align, ALIGN)
 379 __XFS_HAS_V4_FEAT(logv2, LOGV2)
 380 __XFS_HAS_V4_FEAT(extflg, EXTFLG)
 381 __XFS_HAS_V4_FEAT(lazysbcount, LAZYSBCOUNT)
 382 __XFS_ADD_V4_FEAT(attr2, ATTR2)
 383 __XFS_ADD_V4_FEAT(projid32, PROJID32)
 384 __XFS_HAS_V4_FEAT(v3inodes, V3INODES)
 385 __XFS_HAS_V4_FEAT(crc, CRC)
 386 __XFS_HAS_V4_FEAT(pquotino, PQUOTINO)
 387
 388 /*
 389  * Mount features
 390  *
 391  * These do not change dynamically - features that can come and go, such as 32
 392  * bit inodes and read-only state, are kept as operational state rather than
 393  * features.
 394  */
 395 __XFS_HAS_FEAT(noattr2, NOATTR2)
 396 __XFS_HAS_FEAT(noalign, NOALIGN)
 397 __XFS_HAS_FEAT(allocsize, ALLOCSIZE)
 398 __XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE)
 399 __XFS_HAS_FEAT(wsync, WSYNC)
 400 __XFS_HAS_FEAT(dirsync, DIRSYNC)
 401 __XFS_HAS_FEAT(discard, DISCARD)
 402 __XFS_HAS_FEAT(grpid, GRPID)
 403 __XFS_HAS_FEAT(small_inums, SMALL_INUMS)
 404 __XFS_HAS_FEAT(ikeep, IKEEP)
 405 __XFS_HAS_FEAT(swalloc, SWALLOC)
 406 __XFS_HAS_FEAT(filestreams, FILESTREAMS)
 407 __XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
 408 __XFS_HAS_FEAT(dax_never, DAX_NEVER)
 409 __XFS_HAS_FEAT(norecovery, NORECOVERY)
 410 __XFS_HAS_FEAT(nouuid, NOUUID)
 411
 412 /*
 413  * Operational mount state flags
 414  *
 415  * Use these with atomic bit ops only!
 416  */
 417 #define XFS_OPSTATE_UNMOUNTING          0       /* filesystem is unmounting */
 418 #define XFS_OPSTATE_CLEAN               1       /* mount was clean */
 419 #define XFS_OPSTATE_SHUTDOWN            2       /* stop all fs operations */
 420 #define XFS_OPSTATE_INODE32             3       /* inode32 allocator active */
 421 #define XFS_OPSTATE_READONLY            4       /* read-only fs */
 422
 423 /*
 424  * If set, inactivation worker threads will be scheduled to process queued
 425  * inodegc work.  If not, queued inodes remain in memory waiting to be
 426  * processed.
 427  */
 428 #define XFS_OPSTATE_INODEGC_ENABLED     5
 429 /*
 430  * If set, background speculative prealloc gc worker threads will be scheduled
 431  * to process queued blockgc work.  If not, inodes retain their preallocations
 432  * until explicitly deleted.
 433  */
 434 #define XFS_OPSTATE_BLOCKGC_ENABLED     6
 435
 436 /* Kernel has logged a warning about online fsck being used on this fs. */
 437 #define XFS_OPSTATE_WARNED_SCRUB        7
 438 /* Kernel has logged a warning about shrink being used on this fs. */
 439 #define XFS_OPSTATE_WARNED_SHRINK       8
 440 /* Kernel has logged a warning about logged xattr updates being used. */
 441 #define XFS_OPSTATE_WARNED_LARP         9
 442 /* Mount time quotacheck is running */
 443 #define XFS_OPSTATE_QUOTACHECK_RUNNING  10
 444 /* Do we want to clear log incompat flags? */
 445 #define XFS_OPSTATE_UNSET_LOG_INCOMPAT  11
 446 /* Filesystem can use logged extended attributes */
 447 #define XFS_OPSTATE_USE_LARP            12
 448
 449 #define __XFS_IS_OPSTATE(name, NAME) \
 450 static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
 451 { \
 452         return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
 453 } \
 454 static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
 455 { \
 456         return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
 457 } \
 458 static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
 459 { \
 460         return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
 461 }
 462
 463 __XFS_IS_OPSTATE(unmounting, UNMOUNTING)
 464 __XFS_IS_OPSTATE(clean, CLEAN)
 465 __XFS_IS_OPSTATE(shutdown, SHUTDOWN)
 466 __XFS_IS_OPSTATE(inode32, INODE32)
 467 __XFS_IS_OPSTATE(readonly, READONLY)
 468 __XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
 469 __XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED)
 470 #ifdef CONFIG_XFS_QUOTA
 471 __XFS_IS_OPSTATE(quotacheck_running, QUOTACHECK_RUNNING)
 472 #else
 473 # define xfs_is_quotacheck_running(mp)  (false)
 474 #endif
 475 __XFS_IS_OPSTATE(done_with_log_incompat, UNSET_LOG_INCOMPAT)
 476 __XFS_IS_OPSTATE(using_logged_xattrs, USE_LARP)
 477
 478 static inline bool
 479 xfs_should_warn(struct xfs_mount *mp, long nr)
 480 {
 481         return !test_and_set_bit(nr, &mp->m_opstate);
 482 }
 483
 484 #define XFS_OPSTATE_STRINGS \
 485         { (1UL << XFS_OPSTATE_UNMOUNTING),              "unmounting" }, \
 486         { (1UL << XFS_OPSTATE_CLEAN),                   "clean" }, \
 487         { (1UL << XFS_OPSTATE_SHUTDOWN),                "shutdown" }, \
 488         { (1UL << XFS_OPSTATE_INODE32),                 "inode32" }, \
 489         { (1UL << XFS_OPSTATE_READONLY),                "read_only" }, \
 490         { (1UL << XFS_OPSTATE_INODEGC_ENABLED),         "inodegc" }, \
 491         { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED),         "blockgc" }, \
 492         { (1UL << XFS_OPSTATE_WARNED_SCRUB),            "wscrub" }, \
 493         { (1UL << XFS_OPSTATE_WARNED_SHRINK),           "wshrink" }, \
 494         { (1UL << XFS_OPSTATE_WARNED_LARP),             "wlarp" }, \
 495         { (1UL << XFS_OPSTATE_QUOTACHECK_RUNNING),      "quotacheck" }, \
 496         { (1UL << XFS_OPSTATE_UNSET_LOG_INCOMPAT),      "unset_log_incompat" }, \
 497         { (1UL << XFS_OPSTATE_USE_LARP),                "logged_xattrs" }
 498
 499 /*
 500  * Max and min values for mount-option defined I/O
 501  * preallocation sizes.
 502  */
 503 #define XFS_MAX_IO_LOG          30      /* 1G */
 504 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 505
 506 void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
 507                 int lnnum);
 508 #define xfs_force_shutdown(m,f) \
 509         xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
 510
 511 #define SHUTDOWN_META_IO_ERROR  (1u << 0) /* write attempt to metadata failed */
 512 #define SHUTDOWN_LOG_IO_ERROR   (1u << 1) /* write attempt to the log failed */
 513 #define SHUTDOWN_FORCE_UMOUNT   (1u << 2) /* shutdown from a forced unmount */
 514 #define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */
 515 #define SHUTDOWN_CORRUPT_ONDISK (1u << 4)  /* corrupt metadata on device */
 516 #define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */
 517
 518 #define XFS_SHUTDOWN_STRINGS \
 519         { SHUTDOWN_META_IO_ERROR,       "metadata_io" }, \
 520         { SHUTDOWN_LOG_IO_ERROR,        "log_io" }, \
 521         { SHUTDOWN_FORCE_UMOUNT,        "force_umount" }, \
 522         { SHUTDOWN_CORRUPT_INCORE,      "corruption" }, \
 523         { SHUTDOWN_DEVICE_REMOVED,      "device_removed" }
 524
 525 /*
 526  * Flags for xfs_mountfs
 527  */
 528 #define XFS_MFSI_QUIET          0x40    /* Be silent if mount errors found */
 529
 530 static inline xfs_agnumber_t
 531 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
 532 {
 533         xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
 534         do_div(ld, mp->m_sb.sb_agblocks);
 535         return (xfs_agnumber_t) ld;
 536 }
 537
 538 static inline xfs_agblock_t
 539 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 540 {
 541         xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
 542         return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
 543 }
 544
 545 extern void     xfs_uuid_table_free(void);
 546 extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
 547 extern int      xfs_mountfs(xfs_mount_t *mp);
 548 extern void     xfs_unmountfs(xfs_mount_t *);
 549
 550 /*
 551  * Deltas for the block count can vary from 1 to very large, but lock contention
 552  * only occurs on frequent small block count updates such as in the delayed
 553  * allocation path for buffered writes (page a time updates). Hence we set
 554  * a large batch count (1024) to minimise global counter updates except when
 555  * we get near to ENOSPC and we have to be very accurate with our updates.
 556  */
 557 #define XFS_FDBLOCKS_BATCH      1024
 558
 559 /*
 560  * Estimate the amount of free space that is not available to userspace and is
 561  * not explicitly reserved from the incore fdblocks.  This includes:
 562  *
 563  * - The minimum number of blocks needed to support splitting a bmap btree
 564  * - The blocks currently in use by the freespace btrees because they record
 565  *   the actual blocks that will fill per-AG metadata space reservations
 566  */
 567 static inline uint64_t
 568 xfs_fdblocks_unavailable(
 569         struct xfs_mount        *mp)
 570 {
 571         return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);
 572 }
 573
 574 int xfs_dec_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
 575                 uint64_t delta, bool rsvd);
 576 void xfs_add_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
 577                 uint64_t delta);
 578
 579 static inline int xfs_dec_fdblocks(struct xfs_mount *mp, uint64_t delta,
 580                 bool reserved)
 581 {
 582         return xfs_dec_freecounter(mp, &mp->m_fdblocks, delta, reserved);
 583 }
 584
 585 static inline void xfs_add_fdblocks(struct xfs_mount *mp, uint64_t delta)
 586 {
 587         xfs_add_freecounter(mp, &mp->m_fdblocks, delta);
 588 }
 589
 590 static inline int xfs_dec_frextents(struct xfs_mount *mp, uint64_t delta)
 591 {
 592         return xfs_dec_freecounter(mp, &mp->m_frextents, delta, false);
 593 }
 594
 595 static inline void xfs_add_frextents(struct xfs_mount *mp, uint64_t delta)
 596 {
 597         xfs_add_freecounter(mp, &mp->m_frextents, delta);
 598 }
 599
 600 extern int      xfs_readsb(xfs_mount_t *, int);
 601 extern void     xfs_freesb(xfs_mount_t *);
 602 extern bool     xfs_fs_writable(struct xfs_mount *mp, int level);
 603 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
 604
 605 extern int      xfs_dev_is_read_only(struct xfs_mount *, char *);
 606
 607 extern void     xfs_set_low_space_thresholds(struct xfs_mount *);
 608
 609 int     xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
 610                         xfs_off_t count_fsb);
 611
 612 struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
 613                 int error_class, int error);
 614 void xfs_force_summary_recalc(struct xfs_mount *mp);
 615 int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
 616 bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
 617 void xfs_mod_delalloc(struct xfs_inode *ip, int64_t data_delta,
 618                 int64_t ind_delta);
 619
 620 #endif  /* __XFS_MOUNT_H__ */