Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
David Chinner | 775 | 43.27% | 31 | 25.20% |
Christoph Hellwig | 412 | 23.00% | 20 | 16.26% |
Darrick J. Wong | 356 | 19.88% | 33 | 26.83% |
Nathan Scott | 81 | 4.52% | 10 | 8.13% |
Carlos Maiolino | 74 | 4.13% | 6 | 4.88% |
Brian Foster | 30 | 1.68% | 5 | 4.07% |
Eric Sandeen | 16 | 0.89% | 7 | 5.69% |
Chandan Babu R | 11 | 0.61% | 1 | 0.81% |
Lucas Stach | 10 | 0.56% | 1 | 0.81% |
Linus Torvalds (pre-git) | 6 | 0.34% | 1 | 0.81% |
Bill O'Donnell | 5 | 0.28% | 1 | 0.81% |
Shiyang Ruan | 5 | 0.28% | 1 | 0.81% |
Omar Sandoval | 5 | 0.28% | 2 | 1.63% |
Mark Tinguely | 2 | 0.11% | 1 | 0.81% |
Jie Liu | 1 | 0.06% | 1 | 0.81% |
Qi Zheng | 1 | 0.06% | 1 | 0.81% |
Josef 'Jeff' Sipek | 1 | 0.06% | 1 | 0.81% |
Total | 1791 | 123 |
// 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 xfs_mount *mp; struct llist_head list; struct delayed_work work; int error; /* approximate count of inodes in the list */ unsigned int items; unsigned int shrinker_hits; unsigned int cpu; }; /* * 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 */ 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 maximum i for which * rsum[i][bbno] != 0, or 0 if rsum[i][bbno] == 0 for all i. * 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 */ int8_t m_rtxblklog; /* log2 of rextsize, if possible */ 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]; uint64_t m_rtxblkmask; /* rt extent block mask */ 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 /* cpus that have inodes queued for inactivation */ struct cpumask m_inodegc_cpumask; } 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 /* Mount time quotacheck is running */ #define XFS_OPSTATE_QUOTACHECK_RUNNING 10 #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) #ifdef CONFIG_XFS_QUOTA __XFS_IS_OPSTATE(quotacheck_running, QUOTACHECK_RUNNING) #else # define xfs_is_quotacheck_running(mp) (false) #endif 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" }, \ { (1UL << XFS_OPSTATE_QUOTACHECK_RUNNING), "quotacheck" } /* * 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__ */
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