| // 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_nameops; |
| struct xfs_ail; |
| struct xfs_quotainfo; |
| struct xfs_dir_ops; |
| struct xfs_da_geometry; |
| |
| /* 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 */ |
| }; |
| |
| typedef struct xfs_mount { |
| struct super_block *m_super; |
| xfs_tid_t m_tid; /* next unused tid for fs */ |
| struct xfs_ail *m_ail; /* fs active log item list */ |
| |
| struct xfs_sb m_sb; /* copy of fs superblock */ |
| spinlock_t 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 xfs_buf *m_sb_bp; /* buffer for superblock */ |
| char *m_fsname; /* filesystem name */ |
| int m_fsname_len; /* strlen of fs name */ |
| char *m_rtname; /* realtime device name */ |
| char *m_logname; /* external log device name */ |
| int m_bsize; /* fs logical block size */ |
| 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 */ |
| xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
| uint m_readio_log; /* min read size log bytes */ |
| uint m_readio_blocks; /* min read size blocks */ |
| uint m_writeio_log; /* min write size log bytes */ |
| uint m_writeio_blocks; /* min write size blocks */ |
| 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 */ |
| 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 */ |
| /* |
| * 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_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 */ |
| 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_agino_log; /* #bits for agino in inum */ |
| uint m_inode_cluster_size;/* min inode buf size */ |
| unsigned int m_inodes_per_cluster; |
| unsigned int m_blocks_per_cluster; |
| unsigned int m_cluster_align; |
| unsigned int m_cluster_align_inodes; |
| 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_inobt_mxr[2]; /* max inobt btree records */ |
| uint m_inobt_mnr[2]; /* min inobt 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_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
| uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ |
| uint m_in_maxlevels; /* max inobt btree levels. */ |
| uint m_rmap_maxlevels; /* max rmap btree levels */ |
| uint m_refc_maxlevels; /* max refcount btree level */ |
| 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 */ |
| struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
| spinlock_t m_perag_lock; /* lock for m_perag_tree */ |
| struct mutex m_growlock; /* growfs mutex */ |
| int m_fixedfsid[2]; /* unchanged for life of FS */ |
| uint64_t m_flags; /* global mount flags */ |
| bool m_finobt_nores; /* no per-AG finobt resv. */ |
| int m_ialloc_inos; /* inodes in inode allocation */ |
| int m_ialloc_blks; /* blocks in inode allocation */ |
| int m_ialloc_min_blks;/* min blocks in sparse inode |
| * allocation */ |
| int m_inoalign_mask;/* mask sb_inoalignmt if used */ |
| uint m_qflags; /* quota status flags */ |
| struct xfs_trans_resv m_resv; /* precomputed res values */ |
| uint64_t m_maxicount; /* maximum inode count */ |
| uint64_t m_resblks; /* total reserved blocks */ |
| uint64_t m_resblks_avail;/* available reserved blocks */ |
| uint64_t m_resblks_save; /* reserved blks @ remount,ro */ |
| int m_dalign; /* stripe unit */ |
| int m_swidth; /* stripe width */ |
| int m_sinoalign; /* stripe unit inode alignment */ |
| uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
| const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
| const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ |
| const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ |
| uint m_chsize; /* size of next field */ |
| atomic_t m_active_trans; /* number trans frozen */ |
| struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
| struct delayed_work m_reclaim_work; /* background inode reclaim */ |
| struct delayed_work m_eofblocks_work; /* background eof blocks |
| trimming */ |
| struct delayed_work m_cowblocks_work; /* background cow blocks |
| trimming */ |
| bool m_update_sb; /* sb needs update in mount */ |
| int64_t m_low_space[XFS_LOWSP_MAX]; |
| /* low free space thresholds */ |
| 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 */ |
| |
| struct workqueue_struct *m_buf_workqueue; |
| struct workqueue_struct *m_data_workqueue; |
| struct workqueue_struct *m_unwritten_workqueue; |
| struct workqueue_struct *m_cil_workqueue; |
| struct workqueue_struct *m_reclaim_workqueue; |
| struct workqueue_struct *m_log_workqueue; |
| struct workqueue_struct *m_eofblocks_workqueue; |
| struct workqueue_struct *m_sync_workqueue; |
| |
| /* |
| * 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; |
| |
| bool m_always_cow; |
| bool m_fail_unmount; |
| #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; |
| |
| /* |
| * Flags for m_flags. |
| */ |
| #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
| must be synchronous except |
| for space allocations */ |
| #define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */ |
| #define XFS_MOUNT_BAD_SUMMARY (1ULL << 2) /* summary counters are bad */ |
| #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
| #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
| operations, typically for |
| disk errors in metadata */ |
| #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ |
| #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
| allocations */ |
| #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
| #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
| #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
| #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ |
| #define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */ |
| #define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */ |
| #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
| #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
| #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
| * allocation */ |
| #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
| #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
| #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred |
| * I/O size in stat() */ |
| #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
| allocator */ |
| #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
| |
| #define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */ |
| |
| |
| /* |
| * Default minimum read and write sizes. |
| */ |
| #define XFS_READIO_LOG_LARGE 16 |
| #define XFS_WRITEIO_LOG_LARGE 16 |
| |
| /* |
| * 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 |
| |
| /* |
| * Synchronous read and write sizes. This should be |
| * better for NFSv2 wsync filesystems. |
| */ |
| #define XFS_WSYNC_READIO_LOG 15 /* 32k */ |
| #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ |
| |
| /* |
| * Allow large block sizes to be reported to userspace programs if the |
| * "largeio" mount option is used. |
| * |
| * If compatibility mode is specified, simply return the basic unit of caching |
| * so that we don't get inefficient read/modify/write I/O from user apps. |
| * Otherwise.... |
| * |
| * If the underlying volume is a stripe, then return the stripe width in bytes |
| * as the recommended I/O size. It is not a stripe and we've set a default |
| * buffered I/O size, return that, otherwise return the compat default. |
| */ |
| static inline unsigned long |
| xfs_preferred_iosize(xfs_mount_t *mp) |
| { |
| if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) |
| return PAGE_SIZE; |
| return (mp->m_swidth ? |
| (mp->m_swidth << mp->m_sb.sb_blocklog) : |
| ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? |
| (1 << (int)max(mp->m_readio_log, mp->m_writeio_log)) : |
| PAGE_SIZE)); |
| } |
| |
| #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
| ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) |
| #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
| void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
| int lnnum); |
| #define xfs_force_shutdown(m,f) \ |
| xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
| |
| #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
| #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ |
| #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ |
| #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ |
| #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ |
| #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ |
| |
| /* |
| * 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); |
| } |
| |
| /* per-AG block reservation data structures*/ |
| enum xfs_ag_resv_type { |
| XFS_AG_RESV_NONE = 0, |
| XFS_AG_RESV_AGFL, |
| XFS_AG_RESV_METADATA, |
| XFS_AG_RESV_RMAPBT, |
| }; |
| |
| struct xfs_ag_resv { |
| /* number of blocks originally reserved here */ |
| xfs_extlen_t ar_orig_reserved; |
| /* number of blocks reserved here */ |
| xfs_extlen_t ar_reserved; |
| /* number of blocks originally asked for */ |
| xfs_extlen_t ar_asked; |
| }; |
| |
| /* |
| * Per-ag incore structure, copies of information in agf and agi, to improve the |
| * performance of allocation group selection. |
| */ |
| typedef struct xfs_perag { |
| struct xfs_mount *pag_mount; /* owner filesystem */ |
| xfs_agnumber_t pag_agno; /* AG this structure belongs to */ |
| atomic_t pag_ref; /* perag reference count */ |
| char pagf_init; /* this agf's entry is initialized */ |
| char pagi_init; /* this agi's entry is initialized */ |
| char pagf_metadata; /* the agf is preferred to be metadata */ |
| char pagi_inodeok; /* The agi is ok for inodes */ |
| uint8_t pagf_levels[XFS_BTNUM_AGF]; |
| /* # of levels in bno & cnt btree */ |
| bool pagf_agflreset; /* agfl requires reset before use */ |
| uint32_t pagf_flcount; /* count of blocks in freelist */ |
| xfs_extlen_t pagf_freeblks; /* total free blocks */ |
| xfs_extlen_t pagf_longest; /* longest free space */ |
| uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ |
| xfs_agino_t pagi_freecount; /* number of free inodes */ |
| xfs_agino_t pagi_count; /* number of allocated inodes */ |
| |
| /* |
| * Inode allocation search lookup optimisation. |
| * If the pagino matches, the search for new inodes |
| * doesn't need to search the near ones again straight away |
| */ |
| xfs_agino_t pagl_pagino; |
| xfs_agino_t pagl_leftrec; |
| xfs_agino_t pagl_rightrec; |
| spinlock_t pagb_lock; /* lock for pagb_tree */ |
| struct rb_root pagb_tree; /* ordered tree of busy extents */ |
| unsigned int pagb_gen; /* generation count for pagb_tree */ |
| wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */ |
| |
| atomic_t pagf_fstrms; /* # of filestreams active in this AG */ |
| |
| spinlock_t pag_ici_lock; /* incore inode cache lock */ |
| struct radix_tree_root pag_ici_root; /* incore inode cache root */ |
| int pag_ici_reclaimable; /* reclaimable inodes */ |
| struct mutex pag_ici_reclaim_lock; /* serialisation point */ |
| unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ |
| |
| /* buffer cache index */ |
| spinlock_t pag_buf_lock; /* lock for pag_buf_hash */ |
| struct rhashtable pag_buf_hash; |
| |
| /* for rcu-safe freeing */ |
| struct rcu_head rcu_head; |
| int pagb_count; /* pagb slots in use */ |
| |
| /* Blocks reserved for all kinds of metadata. */ |
| struct xfs_ag_resv pag_meta_resv; |
| /* Blocks reserved for the reverse mapping btree. */ |
| struct xfs_ag_resv pag_rmapbt_resv; |
| |
| /* reference count */ |
| uint8_t pagf_refcount_level; |
| |
| /* |
| * Unlinked inode information. This incore information reflects |
| * data stored in the AGI, so callers must hold the AGI buffer lock |
| * or have some other means to control concurrency. |
| */ |
| struct rhashtable pagi_unlinked_hash; |
| } xfs_perag_t; |
| |
| static inline struct xfs_ag_resv * |
| xfs_perag_resv( |
| struct xfs_perag *pag, |
| enum xfs_ag_resv_type type) |
| { |
| switch (type) { |
| case XFS_AG_RESV_METADATA: |
| return &pag->pag_meta_resv; |
| case XFS_AG_RESV_RMAPBT: |
| return &pag->pag_rmapbt_resv; |
| default: |
| return NULL; |
| } |
| } |
| |
| int xfs_buf_hash_init(xfs_perag_t *pag); |
| void xfs_buf_hash_destroy(xfs_perag_t *pag); |
| |
| extern void xfs_uuid_table_free(void); |
| extern int xfs_log_sbcount(xfs_mount_t *); |
| extern uint64_t xfs_default_resblks(xfs_mount_t *mp); |
| extern int xfs_mountfs(xfs_mount_t *mp); |
| extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, |
| xfs_agnumber_t *maxagi); |
| extern void xfs_unmountfs(xfs_mount_t *); |
| |
| extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); |
| extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); |
| extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, |
| bool reserved); |
| extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta); |
| |
| extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); |
| 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); |
| |
| #endif /* __XFS_MOUNT_H__ */ |
