/* * Copyright (c) 2000-2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #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, }; 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 */ 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 */ 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_ag_maxlevels; /* XFS_AG_MAXLEVELS */ uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ uint m_in_maxlevels; /* max inobt btree levels. */ 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 */ uint m_dmevmask; /* DMI events for this FS */ __uint64_t m_flags; /* global mount flags */ 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 */ 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 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; /* * 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; #ifdef DEBUG /* * DEBUG mode instrumentation to test and/or trigger delayed allocation * block killing in the event of failed writes. When enabled, all * buffered writes are forced to fail. All delalloc blocks in the range * of the write (including pre-existing delalloc blocks!) are tossed as * part of the write failure error handling sequence. */ bool m_fail_writes; #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_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_32BITINODES (1ULL << 14) /* do not create inodes above * 32 bits in size */ #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ #define XFS_MOUNT_BARRIER (1ULL << 17) #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_CACHE_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_CACHE_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_daddr_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_daddr_t ld = XFS_BB_TO_FSBT(mp, d); return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); } #ifdef DEBUG static inline bool xfs_mp_fail_writes(struct xfs_mount *mp) { return mp->m_fail_writes; } #else static inline bool xfs_mp_fail_writes(struct xfs_mount *mp) { return 0; } #endif /* * 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 */ __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 */ 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_tree */ struct rb_root pag_buf_tree; /* ordered tree of active buffers */ /* for rcu-safe freeing */ struct rcu_head rcu_head; int pagb_count; /* pagb slots in use */ } xfs_perag_t; 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 int xfs_mount_log_sb(xfs_mount_t *); 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); #endif /* __XFS_MOUNT_H__ */