| 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 | typedef struct xfs_trans_reservations { |
| 22 | uint tr_write; /* extent alloc trans */ |
| 23 | uint tr_itruncate; /* truncate trans */ |
| 24 | uint tr_rename; /* rename trans */ |
| 25 | uint tr_link; /* link trans */ |
| 26 | uint tr_remove; /* unlink trans */ |
| 27 | uint tr_symlink; /* symlink trans */ |
| 28 | uint tr_create; /* create trans */ |
| 29 | uint tr_mkdir; /* mkdir trans */ |
| 30 | uint tr_ifree; /* inode free trans */ |
| 31 | uint tr_ichange; /* inode update trans */ |
| 32 | uint tr_growdata; /* fs data section grow trans */ |
| 33 | uint tr_swrite; /* sync write inode trans */ |
| 34 | uint tr_addafork; /* cvt inode to attributed trans */ |
| 35 | uint tr_writeid; /* write setuid/setgid file */ |
| 36 | uint tr_attrinval; /* attr fork buffer invalidation */ |
| 37 | uint tr_attrset; /* set/create an attribute */ |
| 38 | uint tr_attrrm; /* remove an attribute */ |
| 39 | uint tr_clearagi; /* clear bad agi unlinked ino bucket */ |
| 40 | uint tr_growrtalloc; /* grow realtime allocations */ |
| 41 | uint tr_growrtzero; /* grow realtime zeroing */ |
| 42 | uint tr_growrtfree; /* grow realtime freeing */ |
| 43 | } xfs_trans_reservations_t; |
| 44 | |
| 45 | #ifndef __KERNEL__ |
| 46 | |
| 47 | #define xfs_daddr_to_agno(mp,d) \ |
| 48 | ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks)) |
| 49 | #define xfs_daddr_to_agbno(mp,d) \ |
| 50 | ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks)) |
| 51 | |
| 52 | #else /* __KERNEL__ */ |
| 53 | |
| 54 | #include "xfs_sync.h" |
| 55 | |
| 56 | struct cred; |
| 57 | struct log; |
| 58 | struct xfs_mount_args; |
| 59 | struct xfs_inode; |
| 60 | struct xfs_bmbt_irec; |
| 61 | struct xfs_bmap_free; |
| 62 | struct xfs_extdelta; |
| 63 | struct xfs_swapext; |
| 64 | struct xfs_mru_cache; |
| 65 | struct xfs_nameops; |
| 66 | struct xfs_ail; |
| 67 | struct xfs_quotainfo; |
| 68 | |
| 69 | |
| 70 | /* |
| 71 | * Prototypes and functions for the Data Migration subsystem. |
| 72 | */ |
| 73 | |
| 74 | typedef int (*xfs_send_data_t)(int, struct xfs_inode *, |
| 75 | xfs_off_t, size_t, int, int *); |
| 76 | typedef int (*xfs_send_mmap_t)(struct vm_area_struct *, uint); |
| 77 | typedef int (*xfs_send_destroy_t)(struct xfs_inode *, dm_right_t); |
| 78 | typedef int (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *, |
| 79 | struct xfs_inode *, dm_right_t, |
| 80 | struct xfs_inode *, dm_right_t, |
| 81 | const unsigned char *, const unsigned char *, |
| 82 | mode_t, int, int); |
| 83 | typedef int (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t, |
| 84 | char *, char *); |
| 85 | typedef void (*xfs_send_unmount_t)(struct xfs_mount *, struct xfs_inode *, |
| 86 | dm_right_t, mode_t, int, int); |
| 87 | |
| 88 | typedef struct xfs_dmops { |
| 89 | xfs_send_data_t xfs_send_data; |
| 90 | xfs_send_mmap_t xfs_send_mmap; |
| 91 | xfs_send_destroy_t xfs_send_destroy; |
| 92 | xfs_send_namesp_t xfs_send_namesp; |
| 93 | xfs_send_mount_t xfs_send_mount; |
| 94 | xfs_send_unmount_t xfs_send_unmount; |
| 95 | } xfs_dmops_t; |
| 96 | |
| 97 | #define XFS_DMAPI_UNMOUNT_FLAGS(mp) \ |
| 98 | (((mp)->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ? 0 : DM_FLAGS_UNWANTED) |
| 99 | |
| 100 | #define XFS_SEND_DATA(mp, ev,ip,off,len,fl,lock) \ |
| 101 | (*(mp)->m_dm_ops->xfs_send_data)(ev,ip,off,len,fl,lock) |
| 102 | #define XFS_SEND_MMAP(mp, vma,fl) \ |
| 103 | (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl) |
| 104 | #define XFS_SEND_DESTROY(mp, ip,right) \ |
| 105 | (*(mp)->m_dm_ops->xfs_send_destroy)(ip,right) |
| 106 | #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \ |
| 107 | (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl) |
| 108 | #define XFS_SEND_MOUNT(mp,right,path,name) \ |
| 109 | (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name) |
| 110 | #define XFS_SEND_PREUNMOUNT(mp) \ |
| 111 | do { \ |
| 112 | if (mp->m_flags & XFS_MOUNT_DMAPI) { \ |
| 113 | (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT, mp, \ |
| 114 | (mp)->m_rootip, DM_RIGHT_NULL, \ |
| 115 | (mp)->m_rootip, DM_RIGHT_NULL, \ |
| 116 | NULL, NULL, 0, 0, XFS_DMAPI_UNMOUNT_FLAGS(mp)); \ |
| 117 | } \ |
| 118 | } while (0) |
| 119 | #define XFS_SEND_UNMOUNT(mp) \ |
| 120 | do { \ |
| 121 | if (mp->m_flags & XFS_MOUNT_DMAPI) { \ |
| 122 | (*(mp)->m_dm_ops->xfs_send_unmount)(mp, (mp)->m_rootip, \ |
| 123 | DM_RIGHT_NULL, 0, 0, XFS_DMAPI_UNMOUNT_FLAGS(mp)); \ |
| 124 | } \ |
| 125 | } while (0) |
| 126 | |
| 127 | |
| 128 | #ifdef HAVE_PERCPU_SB |
| 129 | |
| 130 | /* |
| 131 | * Valid per-cpu incore superblock counters. Note that if you add new counters, |
| 132 | * you may need to define new counter disabled bit field descriptors as there |
| 133 | * are more possible fields in the superblock that can fit in a bitfield on a |
| 134 | * 32 bit platform. The XFS_SBS_* values for the current current counters just |
| 135 | * fit. |
| 136 | */ |
| 137 | typedef struct xfs_icsb_cnts { |
| 138 | uint64_t icsb_fdblocks; |
| 139 | uint64_t icsb_ifree; |
| 140 | uint64_t icsb_icount; |
| 141 | unsigned long icsb_flags; |
| 142 | } xfs_icsb_cnts_t; |
| 143 | |
| 144 | #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ |
| 145 | |
| 146 | #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ |
| 147 | |
| 148 | extern int xfs_icsb_init_counters(struct xfs_mount *); |
| 149 | extern void xfs_icsb_reinit_counters(struct xfs_mount *); |
| 150 | extern void xfs_icsb_destroy_counters(struct xfs_mount *); |
| 151 | extern void xfs_icsb_sync_counters(struct xfs_mount *, int); |
| 152 | extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); |
| 153 | |
| 154 | #else |
| 155 | #define xfs_icsb_init_counters(mp) (0) |
| 156 | #define xfs_icsb_destroy_counters(mp) do { } while (0) |
| 157 | #define xfs_icsb_reinit_counters(mp) do { } while (0) |
| 158 | #define xfs_icsb_sync_counters(mp, flags) do { } while (0) |
| 159 | #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) |
| 160 | #endif |
| 161 | |
| 162 | typedef struct xfs_mount { |
| 163 | struct super_block *m_super; |
| 164 | xfs_tid_t m_tid; /* next unused tid for fs */ |
| 165 | struct xfs_ail *m_ail; /* fs active log item list */ |
| 166 | xfs_sb_t m_sb; /* copy of fs superblock */ |
| 167 | spinlock_t m_sb_lock; /* sb counter lock */ |
| 168 | struct xfs_buf *m_sb_bp; /* buffer for superblock */ |
| 169 | char *m_fsname; /* filesystem name */ |
| 170 | int m_fsname_len; /* strlen of fs name */ |
| 171 | char *m_rtname; /* realtime device name */ |
| 172 | char *m_logname; /* external log device name */ |
| 173 | int m_bsize; /* fs logical block size */ |
| 174 | xfs_agnumber_t m_agfrotor; /* last ag where space found */ |
| 175 | xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ |
| 176 | spinlock_t m_agirotor_lock;/* .. and lock protecting it */ |
| 177 | xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
| 178 | uint m_readio_log; /* min read size log bytes */ |
| 179 | uint m_readio_blocks; /* min read size blocks */ |
| 180 | uint m_writeio_log; /* min write size log bytes */ |
| 181 | uint m_writeio_blocks; /* min write size blocks */ |
| 182 | struct log *m_log; /* log specific stuff */ |
| 183 | int m_logbufs; /* number of log buffers */ |
| 184 | int m_logbsize; /* size of each log buffer */ |
| 185 | uint m_rsumlevels; /* rt summary levels */ |
| 186 | uint m_rsumsize; /* size of rt summary, bytes */ |
| 187 | struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ |
| 188 | struct xfs_inode *m_rsumip; /* pointer to summary inode */ |
| 189 | struct xfs_inode *m_rootip; /* pointer to root directory */ |
| 190 | struct xfs_quotainfo *m_quotainfo; /* disk quota information */ |
| 191 | xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ |
| 192 | xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ |
| 193 | xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ |
| 194 | __uint8_t m_blkbit_log; /* blocklog + NBBY */ |
| 195 | __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ |
| 196 | __uint8_t m_agno_log; /* log #ag's */ |
| 197 | __uint8_t m_agino_log; /* #bits for agino in inum */ |
| 198 | __uint16_t m_inode_cluster_size;/* min inode buf size */ |
| 199 | uint m_blockmask; /* sb_blocksize-1 */ |
| 200 | uint m_blockwsize; /* sb_blocksize in words */ |
| 201 | uint m_blockwmask; /* blockwsize-1 */ |
| 202 | uint m_alloc_mxr[2]; /* max alloc btree records */ |
| 203 | uint m_alloc_mnr[2]; /* min alloc btree records */ |
| 204 | uint m_bmap_dmxr[2]; /* max bmap btree records */ |
| 205 | uint m_bmap_dmnr[2]; /* min bmap btree records */ |
| 206 | uint m_inobt_mxr[2]; /* max inobt btree records */ |
| 207 | uint m_inobt_mnr[2]; /* min inobt btree records */ |
| 208 | uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
| 209 | uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ |
| 210 | uint m_in_maxlevels; /* max inobt btree levels. */ |
| 211 | struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
| 212 | spinlock_t m_perag_lock; /* lock for m_perag_tree */ |
| 213 | struct mutex m_growlock; /* growfs mutex */ |
| 214 | int m_fixedfsid[2]; /* unchanged for life of FS */ |
| 215 | uint m_dmevmask; /* DMI events for this FS */ |
| 216 | __uint64_t m_flags; /* global mount flags */ |
| 217 | uint m_dir_node_ents; /* #entries in a dir danode */ |
| 218 | uint m_attr_node_ents; /* #entries in attr danode */ |
| 219 | int m_ialloc_inos; /* inodes in inode allocation */ |
| 220 | int m_ialloc_blks; /* blocks in inode allocation */ |
| 221 | int m_inoalign_mask;/* mask sb_inoalignmt if used */ |
| 222 | uint m_qflags; /* quota status flags */ |
| 223 | xfs_trans_reservations_t m_reservations;/* precomputed res values */ |
| 224 | __uint64_t m_maxicount; /* maximum inode count */ |
| 225 | __uint64_t m_maxioffset; /* maximum inode offset */ |
| 226 | __uint64_t m_resblks; /* total reserved blocks */ |
| 227 | __uint64_t m_resblks_avail;/* available reserved blocks */ |
| 228 | int m_dalign; /* stripe unit */ |
| 229 | int m_swidth; /* stripe width */ |
| 230 | int m_sinoalign; /* stripe unit inode alignment */ |
| 231 | int m_attr_magicpct;/* 37% of the blocksize */ |
| 232 | int m_dir_magicpct; /* 37% of the dir blocksize */ |
| 233 | __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
| 234 | const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
| 235 | int m_dirblksize; /* directory block sz--bytes */ |
| 236 | int m_dirblkfsbs; /* directory block sz--fsbs */ |
| 237 | xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ |
| 238 | xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ |
| 239 | xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ |
| 240 | uint m_chsize; /* size of next field */ |
| 241 | struct xfs_chash *m_chash; /* fs private inode per-cluster |
| 242 | * hash table */ |
| 243 | struct xfs_dmops *m_dm_ops; /* vector of DMI ops */ |
| 244 | struct xfs_qmops *m_qm_ops; /* vector of XQM ops */ |
| 245 | atomic_t m_active_trans; /* number trans frozen */ |
| 246 | #ifdef HAVE_PERCPU_SB |
| 247 | xfs_icsb_cnts_t *m_sb_cnts; /* per-cpu superblock counters */ |
| 248 | unsigned long m_icsb_counters; /* disabled per-cpu counters */ |
| 249 | struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ |
| 250 | struct mutex m_icsb_mutex; /* balancer sync lock */ |
| 251 | #endif |
| 252 | struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
| 253 | struct task_struct *m_sync_task; /* generalised sync thread */ |
| 254 | xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */ |
| 255 | struct list_head m_sync_list; /* sync thread work item list */ |
| 256 | spinlock_t m_sync_lock; /* work item list lock */ |
| 257 | int m_sync_seq; /* sync thread generation no. */ |
| 258 | wait_queue_head_t m_wait_single_sync_task; |
| 259 | __int64_t m_update_flags; /* sb flags we need to update |
| 260 | on the next remount,rw */ |
| 261 | } xfs_mount_t; |
| 262 | |
| 263 | /* |
| 264 | * Flags for m_flags. |
| 265 | */ |
| 266 | #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
| 267 | must be synchronous except |
| 268 | for space allocations */ |
| 269 | #define XFS_MOUNT_DMAPI (1ULL << 2) /* dmapi is enabled */ |
| 270 | #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
| 271 | #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
| 272 | operations, typically for |
| 273 | disk errors in metadata */ |
| 274 | #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to |
| 275 | user */ |
| 276 | #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
| 277 | allocations */ |
| 278 | #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
| 279 | #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
| 280 | #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
| 281 | #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ |
| 282 | #define XFS_MOUNT_OSYNCISOSYNC (1ULL << 13) /* o_sync is REALLY o_sync */ |
| 283 | /* osyncisdsync is now default*/ |
| 284 | #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above |
| 285 | * 32 bits in size */ |
| 286 | #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ |
| 287 | #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
| 288 | #define XFS_MOUNT_BARRIER (1ULL << 17) |
| 289 | #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
| 290 | #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
| 291 | * allocation */ |
| 292 | #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
| 293 | #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
| 294 | #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred |
| 295 | * I/O size in stat() */ |
| 296 | #define XFS_MOUNT_NO_PERCPU_SB (1ULL << 23) /* don't use per-cpu superblock |
| 297 | counters */ |
| 298 | #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
| 299 | allocator */ |
| 300 | #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
| 301 | |
| 302 | |
| 303 | /* |
| 304 | * Default minimum read and write sizes. |
| 305 | */ |
| 306 | #define XFS_READIO_LOG_LARGE 16 |
| 307 | #define XFS_WRITEIO_LOG_LARGE 16 |
| 308 | |
| 309 | /* |
| 310 | * Max and min values for mount-option defined I/O |
| 311 | * preallocation sizes. |
| 312 | */ |
| 313 | #define XFS_MAX_IO_LOG 30 /* 1G */ |
| 314 | #define XFS_MIN_IO_LOG PAGE_SHIFT |
| 315 | |
| 316 | /* |
| 317 | * Synchronous read and write sizes. This should be |
| 318 | * better for NFSv2 wsync filesystems. |
| 319 | */ |
| 320 | #define XFS_WSYNC_READIO_LOG 15 /* 32k */ |
| 321 | #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ |
| 322 | |
| 323 | /* |
| 324 | * Allow large block sizes to be reported to userspace programs if the |
| 325 | * "largeio" mount option is used. |
| 326 | * |
| 327 | * If compatibility mode is specified, simply return the basic unit of caching |
| 328 | * so that we don't get inefficient read/modify/write I/O from user apps. |
| 329 | * Otherwise.... |
| 330 | * |
| 331 | * If the underlying volume is a stripe, then return the stripe width in bytes |
| 332 | * as the recommended I/O size. It is not a stripe and we've set a default |
| 333 | * buffered I/O size, return that, otherwise return the compat default. |
| 334 | */ |
| 335 | static inline unsigned long |
| 336 | xfs_preferred_iosize(xfs_mount_t *mp) |
| 337 | { |
| 338 | if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) |
| 339 | return PAGE_CACHE_SIZE; |
| 340 | return (mp->m_swidth ? |
| 341 | (mp->m_swidth << mp->m_sb.sb_blocklog) : |
| 342 | ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? |
| 343 | (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : |
| 344 | PAGE_CACHE_SIZE)); |
| 345 | } |
| 346 | |
| 347 | #define XFS_MAXIOFFSET(mp) ((mp)->m_maxioffset) |
| 348 | |
| 349 | #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
| 350 | ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) |
| 351 | #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
| 352 | void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
| 353 | int lnnum); |
| 354 | #define xfs_force_shutdown(m,f) \ |
| 355 | xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
| 356 | |
| 357 | #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
| 358 | #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ |
| 359 | #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ |
| 360 | #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ |
| 361 | #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ |
| 362 | #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ |
| 363 | |
| 364 | #define xfs_test_for_freeze(mp) ((mp)->m_super->s_frozen) |
| 365 | #define xfs_wait_for_freeze(mp,l) vfs_check_frozen((mp)->m_super, (l)) |
| 366 | |
| 367 | /* |
| 368 | * Flags for xfs_mountfs |
| 369 | */ |
| 370 | #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
| 371 | |
| 372 | static inline xfs_agnumber_t |
| 373 | xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) |
| 374 | { |
| 375 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
| 376 | do_div(ld, mp->m_sb.sb_agblocks); |
| 377 | return (xfs_agnumber_t) ld; |
| 378 | } |
| 379 | |
| 380 | static inline xfs_agblock_t |
| 381 | xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) |
| 382 | { |
| 383 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
| 384 | return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); |
| 385 | } |
| 386 | |
| 387 | /* |
| 388 | * perag get/put wrappers for ref counting |
| 389 | */ |
| 390 | struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno); |
| 391 | void xfs_perag_put(struct xfs_perag *pag); |
| 392 | |
| 393 | /* |
| 394 | * Per-cpu superblock locking functions |
| 395 | */ |
| 396 | #ifdef HAVE_PERCPU_SB |
| 397 | static inline void |
| 398 | xfs_icsb_lock(xfs_mount_t *mp) |
| 399 | { |
| 400 | mutex_lock(&mp->m_icsb_mutex); |
| 401 | } |
| 402 | |
| 403 | static inline void |
| 404 | xfs_icsb_unlock(xfs_mount_t *mp) |
| 405 | { |
| 406 | mutex_unlock(&mp->m_icsb_mutex); |
| 407 | } |
| 408 | #else |
| 409 | #define xfs_icsb_lock(mp) |
| 410 | #define xfs_icsb_unlock(mp) |
| 411 | #endif |
| 412 | |
| 413 | /* |
| 414 | * This structure is for use by the xfs_mod_incore_sb_batch() routine. |
| 415 | * xfs_growfs can specify a few fields which are more than int limit |
| 416 | */ |
| 417 | typedef struct xfs_mod_sb { |
| 418 | xfs_sb_field_t msb_field; /* Field to modify, see below */ |
| 419 | int64_t msb_delta; /* Change to make to specified field */ |
| 420 | } xfs_mod_sb_t; |
| 421 | |
| 422 | extern int xfs_log_sbcount(xfs_mount_t *, uint); |
| 423 | extern int xfs_mountfs(xfs_mount_t *mp); |
| 424 | |
| 425 | extern void xfs_unmountfs(xfs_mount_t *); |
| 426 | extern int xfs_unmountfs_writesb(xfs_mount_t *); |
| 427 | extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); |
| 428 | extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, |
| 429 | uint, int); |
| 430 | extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); |
| 431 | extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); |
| 432 | extern int xfs_readsb(xfs_mount_t *, int); |
| 433 | extern void xfs_freesb(xfs_mount_t *); |
| 434 | extern int xfs_fs_writable(xfs_mount_t *); |
| 435 | extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); |
| 436 | |
| 437 | extern int xfs_dmops_get(struct xfs_mount *); |
| 438 | extern void xfs_dmops_put(struct xfs_mount *); |
| 439 | |
| 440 | extern struct xfs_dmops xfs_dmcore_xfs; |
| 441 | |
| 442 | #endif /* __KERNEL__ */ |
| 443 | |
| 444 | extern void xfs_mod_sb(struct xfs_trans *, __int64_t); |
| 445 | extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t, |
| 446 | xfs_agnumber_t *); |
| 447 | extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); |
| 448 | extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); |
| 449 | |
| 450 | #endif /* __XFS_MOUNT_H__ */ |