| 1 | /* |
| 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | #ifndef __XFS_MOUNT_H__ |
| 19 | #define __XFS_MOUNT_H__ |
| 20 | |
| 21 | struct xlog; |
| 22 | struct xfs_inode; |
| 23 | struct xfs_mru_cache; |
| 24 | struct xfs_nameops; |
| 25 | struct xfs_ail; |
| 26 | struct xfs_quotainfo; |
| 27 | struct xfs_dir_ops; |
| 28 | struct xfs_da_geometry; |
| 29 | |
| 30 | /* dynamic preallocation free space thresholds, 5% down to 1% */ |
| 31 | enum { |
| 32 | XFS_LOWSP_1_PCNT = 0, |
| 33 | XFS_LOWSP_2_PCNT, |
| 34 | XFS_LOWSP_3_PCNT, |
| 35 | XFS_LOWSP_4_PCNT, |
| 36 | XFS_LOWSP_5_PCNT, |
| 37 | XFS_LOWSP_MAX, |
| 38 | }; |
| 39 | |
| 40 | typedef struct xfs_mount { |
| 41 | struct super_block *m_super; |
| 42 | xfs_tid_t m_tid; /* next unused tid for fs */ |
| 43 | struct xfs_ail *m_ail; /* fs active log item list */ |
| 44 | |
| 45 | struct xfs_sb m_sb; /* copy of fs superblock */ |
| 46 | spinlock_t m_sb_lock; /* sb counter lock */ |
| 47 | struct percpu_counter m_icount; /* allocated inodes counter */ |
| 48 | struct percpu_counter m_ifree; /* free inodes counter */ |
| 49 | struct percpu_counter m_fdblocks; /* free block counter */ |
| 50 | |
| 51 | struct xfs_buf *m_sb_bp; /* buffer for superblock */ |
| 52 | char *m_fsname; /* filesystem name */ |
| 53 | int m_fsname_len; /* strlen of fs name */ |
| 54 | char *m_rtname; /* realtime device name */ |
| 55 | char *m_logname; /* external log device name */ |
| 56 | int m_bsize; /* fs logical block size */ |
| 57 | xfs_agnumber_t m_agfrotor; /* last ag where space found */ |
| 58 | xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ |
| 59 | spinlock_t m_agirotor_lock;/* .. and lock protecting it */ |
| 60 | xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
| 61 | uint m_readio_log; /* min read size log bytes */ |
| 62 | uint m_readio_blocks; /* min read size blocks */ |
| 63 | uint m_writeio_log; /* min write size log bytes */ |
| 64 | uint m_writeio_blocks; /* min write size blocks */ |
| 65 | struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ |
| 66 | struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ |
| 67 | struct xlog *m_log; /* log specific stuff */ |
| 68 | int m_logbufs; /* number of log buffers */ |
| 69 | int m_logbsize; /* size of each log buffer */ |
| 70 | uint m_rsumlevels; /* rt summary levels */ |
| 71 | uint m_rsumsize; /* size of rt summary, bytes */ |
| 72 | struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ |
| 73 | struct xfs_inode *m_rsumip; /* pointer to summary inode */ |
| 74 | struct xfs_inode *m_rootip; /* pointer to root directory */ |
| 75 | struct xfs_quotainfo *m_quotainfo; /* disk quota information */ |
| 76 | xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ |
| 77 | xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ |
| 78 | xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ |
| 79 | __uint8_t m_blkbit_log; /* blocklog + NBBY */ |
| 80 | __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ |
| 81 | __uint8_t m_agno_log; /* log #ag's */ |
| 82 | __uint8_t m_agino_log; /* #bits for agino in inum */ |
| 83 | uint m_inode_cluster_size;/* min inode buf size */ |
| 84 | uint m_blockmask; /* sb_blocksize-1 */ |
| 85 | uint m_blockwsize; /* sb_blocksize in words */ |
| 86 | uint m_blockwmask; /* blockwsize-1 */ |
| 87 | uint m_alloc_mxr[2]; /* max alloc btree records */ |
| 88 | uint m_alloc_mnr[2]; /* min alloc btree records */ |
| 89 | uint m_bmap_dmxr[2]; /* max bmap btree records */ |
| 90 | uint m_bmap_dmnr[2]; /* min bmap btree records */ |
| 91 | uint m_inobt_mxr[2]; /* max inobt btree records */ |
| 92 | uint m_inobt_mnr[2]; /* min inobt btree records */ |
| 93 | uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
| 94 | uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ |
| 95 | uint m_in_maxlevels; /* max inobt btree levels. */ |
| 96 | struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
| 97 | spinlock_t m_perag_lock; /* lock for m_perag_tree */ |
| 98 | struct mutex m_growlock; /* growfs mutex */ |
| 99 | int m_fixedfsid[2]; /* unchanged for life of FS */ |
| 100 | uint m_dmevmask; /* DMI events for this FS */ |
| 101 | __uint64_t m_flags; /* global mount flags */ |
| 102 | int m_ialloc_inos; /* inodes in inode allocation */ |
| 103 | int m_ialloc_blks; /* blocks in inode allocation */ |
| 104 | int m_ialloc_min_blks;/* min blocks in sparse inode |
| 105 | * allocation */ |
| 106 | int m_inoalign_mask;/* mask sb_inoalignmt if used */ |
| 107 | uint m_qflags; /* quota status flags */ |
| 108 | struct xfs_trans_resv m_resv; /* precomputed res values */ |
| 109 | __uint64_t m_maxicount; /* maximum inode count */ |
| 110 | __uint64_t m_resblks; /* total reserved blocks */ |
| 111 | __uint64_t m_resblks_avail;/* available reserved blocks */ |
| 112 | __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ |
| 113 | int m_dalign; /* stripe unit */ |
| 114 | int m_swidth; /* stripe width */ |
| 115 | int m_sinoalign; /* stripe unit inode alignment */ |
| 116 | __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
| 117 | const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
| 118 | const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ |
| 119 | const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ |
| 120 | uint m_chsize; /* size of next field */ |
| 121 | atomic_t m_active_trans; /* number trans frozen */ |
| 122 | struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
| 123 | struct delayed_work m_reclaim_work; /* background inode reclaim */ |
| 124 | struct delayed_work m_eofblocks_work; /* background eof blocks |
| 125 | trimming */ |
| 126 | bool m_update_sb; /* sb needs update in mount */ |
| 127 | int64_t m_low_space[XFS_LOWSP_MAX]; |
| 128 | /* low free space thresholds */ |
| 129 | struct xfs_kobj m_kobj; |
| 130 | struct xstats m_stats; /* per-fs stats */ |
| 131 | |
| 132 | struct workqueue_struct *m_buf_workqueue; |
| 133 | struct workqueue_struct *m_data_workqueue; |
| 134 | struct workqueue_struct *m_unwritten_workqueue; |
| 135 | struct workqueue_struct *m_cil_workqueue; |
| 136 | struct workqueue_struct *m_reclaim_workqueue; |
| 137 | struct workqueue_struct *m_log_workqueue; |
| 138 | struct workqueue_struct *m_eofblocks_workqueue; |
| 139 | |
| 140 | /* |
| 141 | * Generation of the filesysyem layout. This is incremented by each |
| 142 | * growfs, and used by the pNFS server to ensure the client updates |
| 143 | * its view of the block device once it gets a layout that might |
| 144 | * reference the newly added blocks. Does not need to be persistent |
| 145 | * as long as we only allow file system size increments, but if we |
| 146 | * ever support shrinks it would have to be persisted in addition |
| 147 | * to various other kinds of pain inflicted on the pNFS server. |
| 148 | */ |
| 149 | __uint32_t m_generation; |
| 150 | } xfs_mount_t; |
| 151 | |
| 152 | /* |
| 153 | * Flags for m_flags. |
| 154 | */ |
| 155 | #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
| 156 | must be synchronous except |
| 157 | for space allocations */ |
| 158 | #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
| 159 | #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
| 160 | operations, typically for |
| 161 | disk errors in metadata */ |
| 162 | #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ |
| 163 | #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
| 164 | allocations */ |
| 165 | #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
| 166 | #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
| 167 | #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
| 168 | #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ |
| 169 | #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above |
| 170 | * 32 bits in size */ |
| 171 | #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ |
| 172 | #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
| 173 | #define XFS_MOUNT_BARRIER (1ULL << 17) |
| 174 | #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
| 175 | #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
| 176 | * allocation */ |
| 177 | #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
| 178 | #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
| 179 | #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred |
| 180 | * I/O size in stat() */ |
| 181 | #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
| 182 | allocator */ |
| 183 | #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
| 184 | |
| 185 | #define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */ |
| 186 | |
| 187 | |
| 188 | /* |
| 189 | * Default minimum read and write sizes. |
| 190 | */ |
| 191 | #define XFS_READIO_LOG_LARGE 16 |
| 192 | #define XFS_WRITEIO_LOG_LARGE 16 |
| 193 | |
| 194 | /* |
| 195 | * Max and min values for mount-option defined I/O |
| 196 | * preallocation sizes. |
| 197 | */ |
| 198 | #define XFS_MAX_IO_LOG 30 /* 1G */ |
| 199 | #define XFS_MIN_IO_LOG PAGE_SHIFT |
| 200 | |
| 201 | /* |
| 202 | * Synchronous read and write sizes. This should be |
| 203 | * better for NFSv2 wsync filesystems. |
| 204 | */ |
| 205 | #define XFS_WSYNC_READIO_LOG 15 /* 32k */ |
| 206 | #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ |
| 207 | |
| 208 | /* |
| 209 | * Allow large block sizes to be reported to userspace programs if the |
| 210 | * "largeio" mount option is used. |
| 211 | * |
| 212 | * If compatibility mode is specified, simply return the basic unit of caching |
| 213 | * so that we don't get inefficient read/modify/write I/O from user apps. |
| 214 | * Otherwise.... |
| 215 | * |
| 216 | * If the underlying volume is a stripe, then return the stripe width in bytes |
| 217 | * as the recommended I/O size. It is not a stripe and we've set a default |
| 218 | * buffered I/O size, return that, otherwise return the compat default. |
| 219 | */ |
| 220 | static inline unsigned long |
| 221 | xfs_preferred_iosize(xfs_mount_t *mp) |
| 222 | { |
| 223 | if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) |
| 224 | return PAGE_CACHE_SIZE; |
| 225 | return (mp->m_swidth ? |
| 226 | (mp->m_swidth << mp->m_sb.sb_blocklog) : |
| 227 | ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? |
| 228 | (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : |
| 229 | PAGE_CACHE_SIZE)); |
| 230 | } |
| 231 | |
| 232 | #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
| 233 | ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) |
| 234 | #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
| 235 | void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
| 236 | int lnnum); |
| 237 | #define xfs_force_shutdown(m,f) \ |
| 238 | xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
| 239 | |
| 240 | #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
| 241 | #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ |
| 242 | #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ |
| 243 | #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ |
| 244 | #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ |
| 245 | #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ |
| 246 | |
| 247 | /* |
| 248 | * Flags for xfs_mountfs |
| 249 | */ |
| 250 | #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
| 251 | |
| 252 | static inline xfs_agnumber_t |
| 253 | xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) |
| 254 | { |
| 255 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
| 256 | do_div(ld, mp->m_sb.sb_agblocks); |
| 257 | return (xfs_agnumber_t) ld; |
| 258 | } |
| 259 | |
| 260 | static inline xfs_agblock_t |
| 261 | xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) |
| 262 | { |
| 263 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
| 264 | return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); |
| 265 | } |
| 266 | |
| 267 | /* |
| 268 | * Per-ag incore structure, copies of information in agf and agi, to improve the |
| 269 | * performance of allocation group selection. |
| 270 | */ |
| 271 | typedef struct xfs_perag { |
| 272 | struct xfs_mount *pag_mount; /* owner filesystem */ |
| 273 | xfs_agnumber_t pag_agno; /* AG this structure belongs to */ |
| 274 | atomic_t pag_ref; /* perag reference count */ |
| 275 | char pagf_init; /* this agf's entry is initialized */ |
| 276 | char pagi_init; /* this agi's entry is initialized */ |
| 277 | char pagf_metadata; /* the agf is preferred to be metadata */ |
| 278 | char pagi_inodeok; /* The agi is ok for inodes */ |
| 279 | __uint8_t pagf_levels[XFS_BTNUM_AGF]; |
| 280 | /* # of levels in bno & cnt btree */ |
| 281 | __uint32_t pagf_flcount; /* count of blocks in freelist */ |
| 282 | xfs_extlen_t pagf_freeblks; /* total free blocks */ |
| 283 | xfs_extlen_t pagf_longest; /* longest free space */ |
| 284 | __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ |
| 285 | xfs_agino_t pagi_freecount; /* number of free inodes */ |
| 286 | xfs_agino_t pagi_count; /* number of allocated inodes */ |
| 287 | |
| 288 | /* |
| 289 | * Inode allocation search lookup optimisation. |
| 290 | * If the pagino matches, the search for new inodes |
| 291 | * doesn't need to search the near ones again straight away |
| 292 | */ |
| 293 | xfs_agino_t pagl_pagino; |
| 294 | xfs_agino_t pagl_leftrec; |
| 295 | xfs_agino_t pagl_rightrec; |
| 296 | spinlock_t pagb_lock; /* lock for pagb_tree */ |
| 297 | struct rb_root pagb_tree; /* ordered tree of busy extents */ |
| 298 | |
| 299 | atomic_t pagf_fstrms; /* # of filestreams active in this AG */ |
| 300 | |
| 301 | spinlock_t pag_ici_lock; /* incore inode cache lock */ |
| 302 | struct radix_tree_root pag_ici_root; /* incore inode cache root */ |
| 303 | int pag_ici_reclaimable; /* reclaimable inodes */ |
| 304 | struct mutex pag_ici_reclaim_lock; /* serialisation point */ |
| 305 | unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ |
| 306 | |
| 307 | /* buffer cache index */ |
| 308 | spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ |
| 309 | struct rb_root pag_buf_tree; /* ordered tree of active buffers */ |
| 310 | |
| 311 | /* for rcu-safe freeing */ |
| 312 | struct rcu_head rcu_head; |
| 313 | int pagb_count; /* pagb slots in use */ |
| 314 | } xfs_perag_t; |
| 315 | |
| 316 | extern void xfs_uuid_table_free(void); |
| 317 | extern int xfs_log_sbcount(xfs_mount_t *); |
| 318 | extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); |
| 319 | extern int xfs_mountfs(xfs_mount_t *mp); |
| 320 | extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, |
| 321 | xfs_agnumber_t *maxagi); |
| 322 | extern void xfs_unmountfs(xfs_mount_t *); |
| 323 | |
| 324 | extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); |
| 325 | extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); |
| 326 | extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, |
| 327 | bool reserved); |
| 328 | extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta); |
| 329 | |
| 330 | extern int xfs_mount_log_sb(xfs_mount_t *); |
| 331 | extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); |
| 332 | extern int xfs_readsb(xfs_mount_t *, int); |
| 333 | extern void xfs_freesb(xfs_mount_t *); |
| 334 | extern bool xfs_fs_writable(struct xfs_mount *mp, int level); |
| 335 | extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); |
| 336 | |
| 337 | extern int xfs_dev_is_read_only(struct xfs_mount *, char *); |
| 338 | |
| 339 | extern void xfs_set_low_space_thresholds(struct xfs_mount *); |
| 340 | |
| 341 | int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, |
| 342 | xfs_off_t count_fsb); |
| 343 | |
| 344 | #endif /* __XFS_MOUNT_H__ */ |