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_inoalign_mask;/* mask sb_inoalignmt if used */ 105 uint m_qflags; /* quota status flags */ 106 struct xfs_trans_resv m_resv; /* precomputed res values */ 107 __uint64_t m_maxicount; /* maximum inode count */ 108 __uint64_t m_resblks; /* total reserved blocks */ 109 __uint64_t m_resblks_avail;/* available reserved blocks */ 110 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 111 int m_dalign; /* stripe unit */ 112 int m_swidth; /* stripe width */ 113 int m_sinoalign; /* stripe unit inode alignment */ 114 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 115 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 116 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ 117 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ 118 uint m_chsize; /* size of next field */ 119 atomic_t m_active_trans; /* number trans frozen */ 120 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 121 struct delayed_work m_reclaim_work; /* background inode reclaim */ 122 struct delayed_work m_eofblocks_work; /* background eof blocks 123 trimming */ 124 bool m_update_sb; /* sb needs update in mount */ 125 int64_t m_low_space[XFS_LOWSP_MAX]; 126 /* low free space thresholds */ 127 struct xfs_kobj m_kobj; 128 129 struct workqueue_struct *m_buf_workqueue; 130 struct workqueue_struct *m_data_workqueue; 131 struct workqueue_struct *m_unwritten_workqueue; 132 struct workqueue_struct *m_cil_workqueue; 133 struct workqueue_struct *m_reclaim_workqueue; 134 struct workqueue_struct *m_log_workqueue; 135 struct workqueue_struct *m_eofblocks_workqueue; 136 137 /* 138 * Generation of the filesysyem layout. This is incremented by each 139 * growfs, and used by the pNFS server to ensure the client updates 140 * its view of the block device once it gets a layout that might 141 * reference the newly added blocks. Does not need to be persistent 142 * as long as we only allow file system size increments, but if we 143 * ever support shrinks it would have to be persisted in addition 144 * to various other kinds of pain inflicted on the pNFS server. 145 */ 146 __uint32_t m_generation; 147 } xfs_mount_t; 148 149 /* 150 * Flags for m_flags. 151 */ 152 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 153 must be synchronous except 154 for space allocations */ 155 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 156 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 157 operations, typically for 158 disk errors in metadata */ 159 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 160 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 161 allocations */ 162 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 163 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 164 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 165 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 166 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 167 * 32 bits in size */ 168 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 169 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 170 #define XFS_MOUNT_BARRIER (1ULL << 17) 171 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 172 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 173 * allocation */ 174 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 175 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 176 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 177 * I/O size in stat() */ 178 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 179 allocator */ 180 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 181 182 183 /* 184 * Default minimum read and write sizes. 185 */ 186 #define XFS_READIO_LOG_LARGE 16 187 #define XFS_WRITEIO_LOG_LARGE 16 188 189 /* 190 * Max and min values for mount-option defined I/O 191 * preallocation sizes. 192 */ 193 #define XFS_MAX_IO_LOG 30 /* 1G */ 194 #define XFS_MIN_IO_LOG PAGE_SHIFT 195 196 /* 197 * Synchronous read and write sizes. This should be 198 * better for NFSv2 wsync filesystems. 199 */ 200 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 201 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 202 203 /* 204 * Allow large block sizes to be reported to userspace programs if the 205 * "largeio" mount option is used. 206 * 207 * If compatibility mode is specified, simply return the basic unit of caching 208 * so that we don't get inefficient read/modify/write I/O from user apps. 209 * Otherwise.... 210 * 211 * If the underlying volume is a stripe, then return the stripe width in bytes 212 * as the recommended I/O size. It is not a stripe and we've set a default 213 * buffered I/O size, return that, otherwise return the compat default. 214 */ 215 static inline unsigned long 216 xfs_preferred_iosize(xfs_mount_t *mp) 217 { 218 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 219 return PAGE_CACHE_SIZE; 220 return (mp->m_swidth ? 221 (mp->m_swidth << mp->m_sb.sb_blocklog) : 222 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 223 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 224 PAGE_CACHE_SIZE)); 225 } 226 227 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 228 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 229 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 230 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 231 int lnnum); 232 #define xfs_force_shutdown(m,f) \ 233 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 234 235 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 236 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 237 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 238 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 239 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 240 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 241 242 /* 243 * Flags for xfs_mountfs 244 */ 245 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 246 247 static inline xfs_agnumber_t 248 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 249 { 250 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 251 do_div(ld, mp->m_sb.sb_agblocks); 252 return (xfs_agnumber_t) ld; 253 } 254 255 static inline xfs_agblock_t 256 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 257 { 258 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 259 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 260 } 261 262 /* 263 * Per-ag incore structure, copies of information in agf and agi, to improve the 264 * performance of allocation group selection. 265 */ 266 typedef struct xfs_perag { 267 struct xfs_mount *pag_mount; /* owner filesystem */ 268 xfs_agnumber_t pag_agno; /* AG this structure belongs to */ 269 atomic_t pag_ref; /* perag reference count */ 270 char pagf_init; /* this agf's entry is initialized */ 271 char pagi_init; /* this agi's entry is initialized */ 272 char pagf_metadata; /* the agf is preferred to be metadata */ 273 char pagi_inodeok; /* The agi is ok for inodes */ 274 __uint8_t pagf_levels[XFS_BTNUM_AGF]; 275 /* # of levels in bno & cnt btree */ 276 __uint32_t pagf_flcount; /* count of blocks in freelist */ 277 xfs_extlen_t pagf_freeblks; /* total free blocks */ 278 xfs_extlen_t pagf_longest; /* longest free space */ 279 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ 280 xfs_agino_t pagi_freecount; /* number of free inodes */ 281 xfs_agino_t pagi_count; /* number of allocated inodes */ 282 283 /* 284 * Inode allocation search lookup optimisation. 285 * If the pagino matches, the search for new inodes 286 * doesn't need to search the near ones again straight away 287 */ 288 xfs_agino_t pagl_pagino; 289 xfs_agino_t pagl_leftrec; 290 xfs_agino_t pagl_rightrec; 291 spinlock_t pagb_lock; /* lock for pagb_tree */ 292 struct rb_root pagb_tree; /* ordered tree of busy extents */ 293 294 atomic_t pagf_fstrms; /* # of filestreams active in this AG */ 295 296 spinlock_t pag_ici_lock; /* incore inode cache lock */ 297 struct radix_tree_root pag_ici_root; /* incore inode cache root */ 298 int pag_ici_reclaimable; /* reclaimable inodes */ 299 struct mutex pag_ici_reclaim_lock; /* serialisation point */ 300 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ 301 302 /* buffer cache index */ 303 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ 304 struct rb_root pag_buf_tree; /* ordered tree of active buffers */ 305 306 /* for rcu-safe freeing */ 307 struct rcu_head rcu_head; 308 int pagb_count; /* pagb slots in use */ 309 } xfs_perag_t; 310 311 extern int xfs_log_sbcount(xfs_mount_t *); 312 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 313 extern int xfs_mountfs(xfs_mount_t *mp); 314 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, 315 xfs_agnumber_t *maxagi); 316 extern void xfs_unmountfs(xfs_mount_t *); 317 318 extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); 319 extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); 320 extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, 321 bool reserved); 322 extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta); 323 324 extern int xfs_mount_log_sb(xfs_mount_t *); 325 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 326 extern int xfs_readsb(xfs_mount_t *, int); 327 extern void xfs_freesb(xfs_mount_t *); 328 extern bool xfs_fs_writable(struct xfs_mount *mp, int level); 329 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 330 331 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 332 333 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 334 335 #endif /* __XFS_MOUNT_H__ */ 336