| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| */ |
| #ifndef __XFS_MOUNT_H__ |
| #define __XFS_MOUNT_H__ |
| |
| struct xlog; |
| struct xfs_inode; |
| struct xfs_mru_cache; |
| struct xfs_ail; |
| struct xfs_quotainfo; |
| struct xfs_da_geometry; |
| struct xfs_perag; |
| |
| /* dynamic preallocation free space thresholds, 5% down to 1% */ |
| enum { |
| XFS_LOWSP_1_PCNT = 0, |
| XFS_LOWSP_2_PCNT, |
| XFS_LOWSP_3_PCNT, |
| XFS_LOWSP_4_PCNT, |
| XFS_LOWSP_5_PCNT, |
| XFS_LOWSP_MAX, |
| }; |
| |
| /* |
| * Error Configuration |
| * |
| * Error classes define the subsystem the configuration belongs to. |
| * Error numbers define the errors that are configurable. |
| */ |
| enum { |
| XFS_ERR_METADATA, |
| XFS_ERR_CLASS_MAX, |
| }; |
| enum { |
| XFS_ERR_DEFAULT, |
| XFS_ERR_EIO, |
| XFS_ERR_ENOSPC, |
| XFS_ERR_ENODEV, |
| XFS_ERR_ERRNO_MAX, |
| }; |
| |
| #define XFS_ERR_RETRY_FOREVER -1 |
| |
| /* |
| * Although retry_timeout is in jiffies which is normally an unsigned long, |
| * we limit the retry timeout to 86400 seconds, or one day. So even a |
| * signed 32-bit long is sufficient for a HZ value up to 24855. Making it |
| * signed lets us store the special "-1" value, meaning retry forever. |
| */ |
| struct xfs_error_cfg { |
| struct xfs_kobj kobj; |
| int max_retries; |
| long retry_timeout; /* in jiffies, -1 = infinite */ |
| }; |
| |
| /* |
| * Per-cpu deferred inode inactivation GC lists. |
| */ |
| struct xfs_inodegc { |
| struct llist_head list; |
| struct delayed_work work; |
| int error; |
| |
| /* approximate count of inodes in the list */ |
| unsigned int items; |
| unsigned int shrinker_hits; |
| #if defined(DEBUG) || defined(XFS_WARN) |
| unsigned int cpu; |
| #endif |
| }; |
| |
| /* |
| * The struct xfsmount layout is optimised to separate read-mostly variables |
| * from variables that are frequently modified. We put the read-mostly variables |
| * first, then place all the other variables at the end. |
| * |
| * Typically, read-mostly variables are those that are set at mount time and |
| * never changed again, or only change rarely as a result of things like sysfs |
| * knobs being tweaked. |
| */ |
| typedef struct xfs_mount { |
| struct xfs_sb m_sb; /* copy of fs superblock */ |
| struct super_block *m_super; |
| struct xfs_ail *m_ail; /* fs active log item list */ |
| struct xfs_buf *m_sb_bp; /* buffer for superblock */ |
| char *m_rtname; /* realtime device name */ |
| char *m_logname; /* external log device name */ |
| struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ |
| struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ |
| struct xlog *m_log; /* log specific stuff */ |
| struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ |
| struct xfs_inode *m_rsumip; /* pointer to summary inode */ |
| struct xfs_inode *m_rootip; /* pointer to root directory */ |
| struct xfs_quotainfo *m_quotainfo; /* disk quota information */ |
| xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ |
| xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ |
| xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ |
| struct list_head m_mount_list; /* global mount list */ |
| void __percpu *m_inodegc; /* percpu inodegc structures */ |
| |
| /* |
| * Optional cache of rt summary level per bitmap block with the |
| * invariant that m_rsum_cache[bbno] <= the minimum i for which |
| * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip |
| * inode lock. |
| */ |
| uint8_t *m_rsum_cache; |
| struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
| struct workqueue_struct *m_buf_workqueue; |
| struct workqueue_struct *m_unwritten_workqueue; |
| struct workqueue_struct *m_reclaim_workqueue; |
| struct workqueue_struct *m_sync_workqueue; |
| struct workqueue_struct *m_blockgc_wq; |
| struct workqueue_struct *m_inodegc_wq; |
| |
| int m_bsize; /* fs logical block size */ |
| uint8_t m_blkbit_log; /* blocklog + NBBY */ |
| uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ |
| uint8_t m_agno_log; /* log #ag's */ |
| uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
| uint m_blockmask; /* sb_blocksize-1 */ |
| uint m_blockwsize; /* sb_blocksize in words */ |
| uint m_blockwmask; /* blockwsize-1 */ |
| uint m_alloc_mxr[2]; /* max alloc btree records */ |
| uint m_alloc_mnr[2]; /* min alloc btree records */ |
| uint m_bmap_dmxr[2]; /* max bmap btree records */ |
| uint m_bmap_dmnr[2]; /* min bmap btree records */ |
| uint m_rmap_mxr[2]; /* max rmap btree records */ |
| uint m_rmap_mnr[2]; /* min rmap btree records */ |
| uint m_refc_mxr[2]; /* max refc btree records */ |
| uint m_refc_mnr[2]; /* min refc btree records */ |
| uint m_alloc_maxlevels; /* max alloc btree levels */ |
| uint m_bm_maxlevels[2]; /* max bmap btree levels */ |
| uint m_rmap_maxlevels; /* max rmap btree levels */ |
| uint m_refc_maxlevels; /* max refcount btree level */ |
| unsigned int m_agbtree_maxlevels; /* max level of all AG btrees */ |
| xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */ |
| uint m_alloc_set_aside; /* space we can't use */ |
| uint m_ag_max_usable; /* max space per AG */ |
| int m_dalign; /* stripe unit */ |
| int m_swidth; /* stripe width */ |
| xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
| uint m_allocsize_log;/* min write size log bytes */ |
| uint m_allocsize_blocks; /* min write size blocks */ |
| int m_logbufs; /* number of log buffers */ |
| int m_logbsize; /* size of each log buffer */ |
| uint m_rsumlevels; /* rt summary levels */ |
| uint m_rsumsize; /* size of rt summary, bytes */ |
| int m_fixedfsid[2]; /* unchanged for life of FS */ |
| uint m_qflags; /* quota status flags */ |
| uint64_t m_features; /* active filesystem features */ |
| uint64_t m_low_space[XFS_LOWSP_MAX]; |
| uint64_t m_low_rtexts[XFS_LOWSP_MAX]; |
| struct xfs_ino_geometry m_ino_geo; /* inode geometry */ |
| struct xfs_trans_resv m_resv; /* precomputed res values */ |
| /* low free space thresholds */ |
| unsigned long m_opstate; /* dynamic state flags */ |
| bool m_always_cow; |
| bool m_fail_unmount; |
| bool m_finobt_nores; /* no per-AG finobt resv. */ |
| bool m_update_sb; /* sb needs update in mount */ |
| |
| /* |
| * Bitsets of per-fs metadata that have been checked and/or are sick. |
| * Callers must hold m_sb_lock to access these two fields. |
| */ |
| uint8_t m_fs_checked; |
| uint8_t m_fs_sick; |
| /* |
| * Bitsets of rt metadata that have been checked and/or are sick. |
| * Callers must hold m_sb_lock to access this field. |
| */ |
| uint8_t m_rt_checked; |
| uint8_t m_rt_sick; |
| |
| /* |
| * End of read-mostly variables. Frequently written variables and locks |
| * should be placed below this comment from now on. The first variable |
| * here is marked as cacheline aligned so they it is separated from |
| * the read-mostly variables. |
| */ |
| |
| spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */ |
| struct percpu_counter m_icount; /* allocated inodes counter */ |
| struct percpu_counter m_ifree; /* free inodes counter */ |
| struct percpu_counter m_fdblocks; /* free block counter */ |
| struct percpu_counter m_frextents; /* free rt extent counter */ |
| |
| /* |
| * Count of data device blocks reserved for delayed allocations, |
| * including indlen blocks. Does not include allocated CoW staging |
| * extents or anything related to the rt device. |
| */ |
| struct percpu_counter m_delalloc_blks; |
| /* |
| * Global count of allocation btree blocks in use across all AGs. Only |
| * used when perag reservation is enabled. Helps prevent block |
| * reservation from attempting to reserve allocation btree blocks. |
| */ |
| atomic64_t m_allocbt_blks; |
| |
| struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
| spinlock_t m_perag_lock; /* lock for m_perag_tree */ |
| uint64_t m_resblks; /* total reserved blocks */ |
| uint64_t m_resblks_avail;/* available reserved blocks */ |
| uint64_t m_resblks_save; /* reserved blks @ remount,ro */ |
| struct delayed_work m_reclaim_work; /* background inode reclaim */ |
| struct dentry *m_debugfs; /* debugfs parent */ |
| struct xfs_kobj m_kobj; |
| struct xfs_kobj m_error_kobj; |
| struct xfs_kobj m_error_meta_kobj; |
| struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX]; |
| struct xstats m_stats; /* per-fs stats */ |
| #ifdef CONFIG_XFS_ONLINE_SCRUB_STATS |
| struct xchk_stats *m_scrub_stats; |
| #endif |
| xfs_agnumber_t m_agfrotor; /* last ag where space found */ |
| atomic_t m_agirotor; /* last ag dir inode alloced */ |
| |
| /* Memory shrinker to throttle and reprioritize inodegc */ |
| struct shrinker m_inodegc_shrinker; |
| /* |
| * Workqueue item so that we can coalesce multiple inode flush attempts |
| * into a single flush. |
| */ |
| struct work_struct m_flush_inodes_work; |
| |
| /* |
| * Generation of the filesysyem layout. This is incremented by each |
| * growfs, and used by the pNFS server to ensure the client updates |
| * its view of the block device once it gets a layout that might |
| * reference the newly added blocks. Does not need to be persistent |
| * as long as we only allow file system size increments, but if we |
| * ever support shrinks it would have to be persisted in addition |
| * to various other kinds of pain inflicted on the pNFS server. |
| */ |
| uint32_t m_generation; |
| struct mutex m_growlock; /* growfs mutex */ |
| |
| #ifdef DEBUG |
| /* |
| * Frequency with which errors are injected. Replaces xfs_etest; the |
| * value stored in here is the inverse of the frequency with which the |
| * error triggers. 1 = always, 2 = half the time, etc. |
| */ |
| unsigned int *m_errortag; |
| struct xfs_kobj m_errortag_kobj; |
| #endif |
| } xfs_mount_t; |
| |
| #define M_IGEO(mp) (&(mp)->m_ino_geo) |
| |
| /* |
| * Flags for m_features. |
| * |
| * These are all the active features in the filesystem, regardless of how |
| * they are configured. |
| */ |
| #define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */ |
| #define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */ |
| #define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */ |
| #define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */ |
| #define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */ |
| #define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */ |
| #define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */ |
| #define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */ |
| #define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */ |
| #define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */ |
| #define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */ |
| #define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */ |
| #define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */ |
| #define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */ |
| #define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */ |
| #define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */ |
| #define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */ |
| #define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */ |
| #define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */ |
| #define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */ |
| #define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */ |
| #define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */ |
| #define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */ |
| #define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */ |
| #define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */ |
| #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */ |
| #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */ |
| |
| /* Mount features */ |
| #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */ |
| #define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */ |
| #define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */ |
| #define XFS_FEAT_LARGE_IOSIZE (1ULL << 51) /* report large preferred |
| * I/O size in stat() */ |
| #define XFS_FEAT_WSYNC (1ULL << 52) /* synchronous metadata ops */ |
| #define XFS_FEAT_DIRSYNC (1ULL << 53) /* synchronous directory ops */ |
| #define XFS_FEAT_DISCARD (1ULL << 54) /* discard unused blocks */ |
| #define XFS_FEAT_GRPID (1ULL << 55) /* group-ID assigned from directory */ |
| #define XFS_FEAT_SMALL_INUMS (1ULL << 56) /* user wants 32bit inodes */ |
| #define XFS_FEAT_IKEEP (1ULL << 57) /* keep empty inode clusters*/ |
| #define XFS_FEAT_SWALLOC (1ULL << 58) /* stripe width allocation */ |
| #define XFS_FEAT_FILESTREAMS (1ULL << 59) /* use filestreams allocator */ |
| #define XFS_FEAT_DAX_ALWAYS (1ULL << 60) /* DAX always enabled */ |
| #define XFS_FEAT_DAX_NEVER (1ULL << 61) /* DAX never enabled */ |
| #define XFS_FEAT_NORECOVERY (1ULL << 62) /* no recovery - dirty fs */ |
| #define XFS_FEAT_NOUUID (1ULL << 63) /* ignore uuid during mount */ |
| |
| #define __XFS_HAS_FEAT(name, NAME) \ |
| static inline bool xfs_has_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return mp->m_features & XFS_FEAT_ ## NAME; \ |
| } |
| |
| /* Some features can be added dynamically so they need a set wrapper, too. */ |
| #define __XFS_ADD_FEAT(name, NAME) \ |
| __XFS_HAS_FEAT(name, NAME); \ |
| static inline void xfs_add_ ## name (struct xfs_mount *mp) \ |
| { \ |
| mp->m_features |= XFS_FEAT_ ## NAME; \ |
| xfs_sb_version_add ## name(&mp->m_sb); \ |
| } |
| |
| /* Superblock features */ |
| __XFS_ADD_FEAT(attr, ATTR) |
| __XFS_HAS_FEAT(nlink, NLINK) |
| __XFS_ADD_FEAT(quota, QUOTA) |
| __XFS_HAS_FEAT(align, ALIGN) |
| __XFS_HAS_FEAT(dalign, DALIGN) |
| __XFS_HAS_FEAT(logv2, LOGV2) |
| __XFS_HAS_FEAT(sector, SECTOR) |
| __XFS_HAS_FEAT(extflg, EXTFLG) |
| __XFS_HAS_FEAT(asciici, ASCIICI) |
| __XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT) |
| __XFS_ADD_FEAT(attr2, ATTR2) |
| __XFS_HAS_FEAT(parent, PARENT) |
| __XFS_ADD_FEAT(projid32, PROJID32) |
| __XFS_HAS_FEAT(crc, CRC) |
| __XFS_HAS_FEAT(v3inodes, V3INODES) |
| __XFS_HAS_FEAT(pquotino, PQUOTINO) |
| __XFS_HAS_FEAT(ftype, FTYPE) |
| __XFS_HAS_FEAT(finobt, FINOBT) |
| __XFS_HAS_FEAT(rmapbt, RMAPBT) |
| __XFS_HAS_FEAT(reflink, REFLINK) |
| __XFS_HAS_FEAT(sparseinodes, SPINODES) |
| __XFS_HAS_FEAT(metauuid, META_UUID) |
| __XFS_HAS_FEAT(realtime, REALTIME) |
| __XFS_HAS_FEAT(inobtcounts, INOBTCNT) |
| __XFS_HAS_FEAT(bigtime, BIGTIME) |
| __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR) |
| __XFS_HAS_FEAT(large_extent_counts, NREXT64) |
| |
| /* |
| * Mount features |
| * |
| * These do not change dynamically - features that can come and go, such as 32 |
| * bit inodes and read-only state, are kept as operational state rather than |
| * features. |
| */ |
| __XFS_HAS_FEAT(noattr2, NOATTR2) |
| __XFS_HAS_FEAT(noalign, NOALIGN) |
| __XFS_HAS_FEAT(allocsize, ALLOCSIZE) |
| __XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE) |
| __XFS_HAS_FEAT(wsync, WSYNC) |
| __XFS_HAS_FEAT(dirsync, DIRSYNC) |
| __XFS_HAS_FEAT(discard, DISCARD) |
| __XFS_HAS_FEAT(grpid, GRPID) |
| __XFS_HAS_FEAT(small_inums, SMALL_INUMS) |
| __XFS_HAS_FEAT(ikeep, IKEEP) |
| __XFS_HAS_FEAT(swalloc, SWALLOC) |
| __XFS_HAS_FEAT(filestreams, FILESTREAMS) |
| __XFS_HAS_FEAT(dax_always, DAX_ALWAYS) |
| __XFS_HAS_FEAT(dax_never, DAX_NEVER) |
| __XFS_HAS_FEAT(norecovery, NORECOVERY) |
| __XFS_HAS_FEAT(nouuid, NOUUID) |
| |
| /* |
| * Operational mount state flags |
| * |
| * Use these with atomic bit ops only! |
| */ |
| #define XFS_OPSTATE_UNMOUNTING 0 /* filesystem is unmounting */ |
| #define XFS_OPSTATE_CLEAN 1 /* mount was clean */ |
| #define XFS_OPSTATE_SHUTDOWN 2 /* stop all fs operations */ |
| #define XFS_OPSTATE_INODE32 3 /* inode32 allocator active */ |
| #define XFS_OPSTATE_READONLY 4 /* read-only fs */ |
| |
| /* |
| * If set, inactivation worker threads will be scheduled to process queued |
| * inodegc work. If not, queued inodes remain in memory waiting to be |
| * processed. |
| */ |
| #define XFS_OPSTATE_INODEGC_ENABLED 5 |
| /* |
| * If set, background speculative prealloc gc worker threads will be scheduled |
| * to process queued blockgc work. If not, inodes retain their preallocations |
| * until explicitly deleted. |
| */ |
| #define XFS_OPSTATE_BLOCKGC_ENABLED 6 |
| |
| /* Kernel has logged a warning about online fsck being used on this fs. */ |
| #define XFS_OPSTATE_WARNED_SCRUB 7 |
| /* Kernel has logged a warning about shrink being used on this fs. */ |
| #define XFS_OPSTATE_WARNED_SHRINK 8 |
| /* Kernel has logged a warning about logged xattr updates being used. */ |
| #define XFS_OPSTATE_WARNED_LARP 9 |
| |
| #define __XFS_IS_OPSTATE(name, NAME) \ |
| static inline bool xfs_is_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ |
| } \ |
| static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ |
| } \ |
| static inline bool xfs_set_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \ |
| } |
| |
| __XFS_IS_OPSTATE(unmounting, UNMOUNTING) |
| __XFS_IS_OPSTATE(clean, CLEAN) |
| __XFS_IS_OPSTATE(shutdown, SHUTDOWN) |
| __XFS_IS_OPSTATE(inode32, INODE32) |
| __XFS_IS_OPSTATE(readonly, READONLY) |
| __XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED) |
| __XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED) |
| |
| static inline bool |
| xfs_should_warn(struct xfs_mount *mp, long nr) |
| { |
| return !test_and_set_bit(nr, &mp->m_opstate); |
| } |
| |
| #define XFS_OPSTATE_STRINGS \ |
| { (1UL << XFS_OPSTATE_UNMOUNTING), "unmounting" }, \ |
| { (1UL << XFS_OPSTATE_CLEAN), "clean" }, \ |
| { (1UL << XFS_OPSTATE_SHUTDOWN), "shutdown" }, \ |
| { (1UL << XFS_OPSTATE_INODE32), "inode32" }, \ |
| { (1UL << XFS_OPSTATE_READONLY), "read_only" }, \ |
| { (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }, \ |
| { (1UL << XFS_OPSTATE_BLOCKGC_ENABLED), "blockgc" }, \ |
| { (1UL << XFS_OPSTATE_WARNED_SCRUB), "wscrub" }, \ |
| { (1UL << XFS_OPSTATE_WARNED_SHRINK), "wshrink" }, \ |
| { (1UL << XFS_OPSTATE_WARNED_LARP), "wlarp" } |
| |
| /* |
| * Max and min values for mount-option defined I/O |
| * preallocation sizes. |
| */ |
| #define XFS_MAX_IO_LOG 30 /* 1G */ |
| #define XFS_MIN_IO_LOG PAGE_SHIFT |
| |
| void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname, |
| int lnnum); |
| #define xfs_force_shutdown(m,f) \ |
| xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
| |
| #define SHUTDOWN_META_IO_ERROR (1u << 0) /* write attempt to metadata failed */ |
| #define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */ |
| #define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */ |
| #define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */ |
| #define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */ |
| #define SHUTDOWN_DEVICE_REMOVED (1u << 5) /* device removed underneath us */ |
| |
| #define XFS_SHUTDOWN_STRINGS \ |
| { SHUTDOWN_META_IO_ERROR, "metadata_io" }, \ |
| { SHUTDOWN_LOG_IO_ERROR, "log_io" }, \ |
| { SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \ |
| { SHUTDOWN_CORRUPT_INCORE, "corruption" }, \ |
| { SHUTDOWN_DEVICE_REMOVED, "device_removed" } |
| |
| /* |
| * Flags for xfs_mountfs |
| */ |
| #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
| |
| static inline xfs_agnumber_t |
| xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) |
| { |
| xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); |
| do_div(ld, mp->m_sb.sb_agblocks); |
| return (xfs_agnumber_t) ld; |
| } |
| |
| static inline xfs_agblock_t |
| xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) |
| { |
| xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); |
| return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); |
| } |
| |
| int xfs_buf_hash_init(struct xfs_perag *pag); |
| void xfs_buf_hash_destroy(struct xfs_perag *pag); |
| |
| extern void xfs_uuid_table_free(void); |
| extern uint64_t xfs_default_resblks(xfs_mount_t *mp); |
| extern int xfs_mountfs(xfs_mount_t *mp); |
| extern void xfs_unmountfs(xfs_mount_t *); |
| |
| /* |
| * Deltas for the block count can vary from 1 to very large, but lock contention |
| * only occurs on frequent small block count updates such as in the delayed |
| * allocation path for buffered writes (page a time updates). Hence we set |
| * a large batch count (1024) to minimise global counter updates except when |
| * we get near to ENOSPC and we have to be very accurate with our updates. |
| */ |
| #define XFS_FDBLOCKS_BATCH 1024 |
| |
| /* |
| * Estimate the amount of free space that is not available to userspace and is |
| * not explicitly reserved from the incore fdblocks. This includes: |
| * |
| * - The minimum number of blocks needed to support splitting a bmap btree |
| * - The blocks currently in use by the freespace btrees because they record |
| * the actual blocks that will fill per-AG metadata space reservations |
| */ |
| static inline uint64_t |
| xfs_fdblocks_unavailable( |
| struct xfs_mount *mp) |
| { |
| return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks); |
| } |
| |
| int xfs_mod_freecounter(struct xfs_mount *mp, struct percpu_counter *counter, |
| int64_t delta, bool rsvd); |
| |
| static inline int |
| xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, bool reserved) |
| { |
| return xfs_mod_freecounter(mp, &mp->m_fdblocks, delta, reserved); |
| } |
| |
| static inline int |
| xfs_mod_frextents(struct xfs_mount *mp, int64_t delta) |
| { |
| return xfs_mod_freecounter(mp, &mp->m_frextents, delta, false); |
| } |
| |
| extern int xfs_readsb(xfs_mount_t *, int); |
| extern void xfs_freesb(xfs_mount_t *); |
| extern bool xfs_fs_writable(struct xfs_mount *mp, int level); |
| extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t); |
| |
| extern int xfs_dev_is_read_only(struct xfs_mount *, char *); |
| |
| extern void xfs_set_low_space_thresholds(struct xfs_mount *); |
| |
| int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, |
| xfs_off_t count_fsb); |
| |
| struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp, |
| int error_class, int error); |
| void xfs_force_summary_recalc(struct xfs_mount *mp); |
| int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature); |
| bool xfs_clear_incompat_log_features(struct xfs_mount *mp); |
| void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta); |
| |
| #endif /* __XFS_MOUNT_H__ */ |