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-rw-r--r--fs/xfs/xfs_mount.h554
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diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
new file mode 100644
index 000000000..69ddd5319
--- /dev/null
+++ b/fs/xfs/xfs_mount.h
@@ -0,0 +1,554 @@
+// 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;
+
+ /* 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 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 */
+ xfs_agnumber_t m_agfrotor; /* last ag where space found */
+ xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
+ spinlock_t m_agirotor_lock;/* .. and lock protecting it */
+
+ /* 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 XFS_SHUTDOWN_STRINGS \
+ { SHUTDOWN_META_IO_ERROR, "metadata_io" }, \
+ { SHUTDOWN_LOG_IO_ERROR, "log_io" }, \
+ { SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \
+ { SHUTDOWN_CORRUPT_INCORE, "corruption" }
+
+/*
+ * 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__ */