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 22 typedef struct xfs_trans_reservations { 23 uint tr_write; /* extent alloc trans */ 24 uint tr_itruncate; /* truncate trans */ 25 uint tr_rename; /* rename trans */ 26 uint tr_link; /* link trans */ 27 uint tr_remove; /* unlink trans */ 28 uint tr_symlink; /* symlink trans */ 29 uint tr_create; /* create trans */ 30 uint tr_mkdir; /* mkdir trans */ 31 uint tr_ifree; /* inode free trans */ 32 uint tr_ichange; /* inode update trans */ 33 uint tr_growdata; /* fs data section grow trans */ 34 uint tr_swrite; /* sync write inode trans */ 35 uint tr_addafork; /* cvt inode to attributed trans */ 36 uint tr_writeid; /* write setuid/setgid file */ 37 uint tr_attrinval; /* attr fork buffer invalidation */ 38 uint tr_attrset; /* set/create an attribute */ 39 uint tr_attrrm; /* remove an attribute */ 40 uint tr_clearagi; /* clear bad agi unlinked ino bucket */ 41 uint tr_growrtalloc; /* grow realtime allocations */ 42 uint tr_growrtzero; /* grow realtime zeroing */ 43 uint tr_growrtfree; /* grow realtime freeing */ 44 } xfs_trans_reservations_t; 45 46 #ifndef __KERNEL__ 47 /* 48 * Moved here from xfs_ag.h to avoid reordering header files 49 */ 50 #define XFS_DADDR_TO_AGNO(mp,d) \ 51 ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks)) 52 #define XFS_DADDR_TO_AGBNO(mp,d) \ 53 ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks)) 54 #else 55 struct cred; 56 struct log; 57 struct xfs_mount_args; 58 struct xfs_inode; 59 struct xfs_bmbt_irec; 60 struct xfs_bmap_free; 61 struct xfs_extdelta; 62 struct xfs_swapext; 63 struct xfs_mru_cache; 64 struct xfs_nameops; 65 66 /* 67 * Prototypes and functions for the Data Migration subsystem. 68 */ 69 70 typedef int (*xfs_send_data_t)(int, struct xfs_inode *, 71 xfs_off_t, size_t, int, int *); 72 typedef int (*xfs_send_mmap_t)(struct vm_area_struct *, uint); 73 typedef int (*xfs_send_destroy_t)(struct xfs_inode *, dm_right_t); 74 typedef int (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *, 75 struct xfs_inode *, dm_right_t, 76 struct xfs_inode *, dm_right_t, 77 const char *, const char *, mode_t, int, int); 78 typedef int (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t, 79 char *, char *); 80 typedef void (*xfs_send_unmount_t)(struct xfs_mount *, struct xfs_inode *, 81 dm_right_t, mode_t, int, int); 82 83 typedef struct xfs_dmops { 84 xfs_send_data_t xfs_send_data; 85 xfs_send_mmap_t xfs_send_mmap; 86 xfs_send_destroy_t xfs_send_destroy; 87 xfs_send_namesp_t xfs_send_namesp; 88 xfs_send_mount_t xfs_send_mount; 89 xfs_send_unmount_t xfs_send_unmount; 90 } xfs_dmops_t; 91 92 #define XFS_SEND_DATA(mp, ev,ip,off,len,fl,lock) \ 93 (*(mp)->m_dm_ops->xfs_send_data)(ev,ip,off,len,fl,lock) 94 #define XFS_SEND_MMAP(mp, vma,fl) \ 95 (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl) 96 #define XFS_SEND_DESTROY(mp, ip,right) \ 97 (*(mp)->m_dm_ops->xfs_send_destroy)(ip,right) 98 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \ 99 (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl) 100 #define XFS_SEND_PREUNMOUNT(mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) \ 101 (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT,mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) 102 #define XFS_SEND_MOUNT(mp,right,path,name) \ 103 (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name) 104 #define XFS_SEND_UNMOUNT(mp, ip,right,mode,rval,fl) \ 105 (*(mp)->m_dm_ops->xfs_send_unmount)(mp,ip,right,mode,rval,fl) 106 107 108 /* 109 * Prototypes and functions for the Quota Management subsystem. 110 */ 111 112 struct xfs_dquot; 113 struct xfs_dqtrxops; 114 struct xfs_quotainfo; 115 116 typedef int (*xfs_qminit_t)(struct xfs_mount *, uint *, uint *); 117 typedef int (*xfs_qmmount_t)(struct xfs_mount *, uint, uint); 118 typedef int (*xfs_qmunmount_t)(struct xfs_mount *); 119 typedef void (*xfs_qmdone_t)(struct xfs_mount *); 120 typedef void (*xfs_dqrele_t)(struct xfs_dquot *); 121 typedef int (*xfs_dqattach_t)(struct xfs_inode *, uint); 122 typedef void (*xfs_dqdetach_t)(struct xfs_inode *); 123 typedef int (*xfs_dqpurgeall_t)(struct xfs_mount *, uint); 124 typedef int (*xfs_dqvopalloc_t)(struct xfs_mount *, 125 struct xfs_inode *, uid_t, gid_t, prid_t, uint, 126 struct xfs_dquot **, struct xfs_dquot **); 127 typedef void (*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *, 128 struct xfs_dquot *, struct xfs_dquot *); 129 typedef int (*xfs_dqvoprename_t)(struct xfs_inode **); 130 typedef struct xfs_dquot * (*xfs_dqvopchown_t)( 131 struct xfs_trans *, struct xfs_inode *, 132 struct xfs_dquot **, struct xfs_dquot *); 133 typedef int (*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *, 134 struct xfs_dquot *, struct xfs_dquot *, uint); 135 typedef void (*xfs_dqstatvfs_t)(struct xfs_inode *, bhv_statvfs_t *); 136 typedef int (*xfs_dqsync_t)(struct xfs_mount *, int flags); 137 typedef int (*xfs_quotactl_t)(struct xfs_mount *, int, int, xfs_caddr_t); 138 139 typedef struct xfs_qmops { 140 xfs_qminit_t xfs_qminit; 141 xfs_qmdone_t xfs_qmdone; 142 xfs_qmmount_t xfs_qmmount; 143 xfs_qmunmount_t xfs_qmunmount; 144 xfs_dqrele_t xfs_dqrele; 145 xfs_dqattach_t xfs_dqattach; 146 xfs_dqdetach_t xfs_dqdetach; 147 xfs_dqpurgeall_t xfs_dqpurgeall; 148 xfs_dqvopalloc_t xfs_dqvopalloc; 149 xfs_dqvopcreate_t xfs_dqvopcreate; 150 xfs_dqvoprename_t xfs_dqvoprename; 151 xfs_dqvopchown_t xfs_dqvopchown; 152 xfs_dqvopchownresv_t xfs_dqvopchownresv; 153 xfs_dqstatvfs_t xfs_dqstatvfs; 154 xfs_dqsync_t xfs_dqsync; 155 xfs_quotactl_t xfs_quotactl; 156 struct xfs_dqtrxops *xfs_dqtrxops; 157 } xfs_qmops_t; 158 159 #define XFS_QM_INIT(mp, mnt, fl) \ 160 (*(mp)->m_qm_ops->xfs_qminit)(mp, mnt, fl) 161 #define XFS_QM_MOUNT(mp, mnt, fl) \ 162 (*(mp)->m_qm_ops->xfs_qmmount)(mp, mnt, fl) 163 #define XFS_QM_UNMOUNT(mp) \ 164 (*(mp)->m_qm_ops->xfs_qmunmount)(mp) 165 #define XFS_QM_DONE(mp) \ 166 (*(mp)->m_qm_ops->xfs_qmdone)(mp) 167 #define XFS_QM_DQRELE(mp, dq) \ 168 (*(mp)->m_qm_ops->xfs_dqrele)(dq) 169 #define XFS_QM_DQATTACH(mp, ip, fl) \ 170 (*(mp)->m_qm_ops->xfs_dqattach)(ip, fl) 171 #define XFS_QM_DQDETACH(mp, ip) \ 172 (*(mp)->m_qm_ops->xfs_dqdetach)(ip) 173 #define XFS_QM_DQPURGEALL(mp, fl) \ 174 (*(mp)->m_qm_ops->xfs_dqpurgeall)(mp, fl) 175 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \ 176 (*(mp)->m_qm_ops->xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2) 177 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \ 178 (*(mp)->m_qm_ops->xfs_dqvopcreate)(tp, ip, dq1, dq2) 179 #define XFS_QM_DQVOPRENAME(mp, ip) \ 180 (*(mp)->m_qm_ops->xfs_dqvoprename)(ip) 181 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \ 182 (*(mp)->m_qm_ops->xfs_dqvopchown)(tp, ip, dqp, dq) 183 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \ 184 (*(mp)->m_qm_ops->xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl) 185 #define XFS_QM_DQSTATVFS(ip, statp) \ 186 (*(ip)->i_mount->m_qm_ops->xfs_dqstatvfs)(ip, statp) 187 #define XFS_QM_DQSYNC(mp, flags) \ 188 (*(mp)->m_qm_ops->xfs_dqsync)(mp, flags) 189 #define XFS_QM_QUOTACTL(mp, cmd, id, addr) \ 190 (*(mp)->m_qm_ops->xfs_quotactl)(mp, cmd, id, addr) 191 192 #ifdef HAVE_PERCPU_SB 193 194 /* 195 * Valid per-cpu incore superblock counters. Note that if you add new counters, 196 * you may need to define new counter disabled bit field descriptors as there 197 * are more possible fields in the superblock that can fit in a bitfield on a 198 * 32 bit platform. The XFS_SBS_* values for the current current counters just 199 * fit. 200 */ 201 typedef struct xfs_icsb_cnts { 202 uint64_t icsb_fdblocks; 203 uint64_t icsb_ifree; 204 uint64_t icsb_icount; 205 unsigned long icsb_flags; 206 } xfs_icsb_cnts_t; 207 208 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 209 210 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 211 212 extern int xfs_icsb_init_counters(struct xfs_mount *); 213 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 214 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 215 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 216 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 217 218 #else 219 #define xfs_icsb_init_counters(mp) (0) 220 #define xfs_icsb_destroy_counters(mp) do { } while (0) 221 #define xfs_icsb_reinit_counters(mp) do { } while (0) 222 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 223 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 224 #endif 225 226 typedef struct xfs_ail { 227 struct list_head xa_ail; 228 uint xa_gen; 229 struct task_struct *xa_task; 230 xfs_lsn_t xa_target; 231 } xfs_ail_t; 232 233 typedef struct xfs_mount { 234 struct super_block *m_super; 235 xfs_tid_t m_tid; /* next unused tid for fs */ 236 spinlock_t m_ail_lock; /* fs AIL mutex */ 237 xfs_ail_t m_ail; /* fs active log item list */ 238 xfs_sb_t m_sb; /* copy of fs superblock */ 239 spinlock_t m_sb_lock; /* sb counter lock */ 240 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 241 char *m_fsname; /* filesystem name */ 242 int m_fsname_len; /* strlen of fs name */ 243 char *m_rtname; /* realtime device name */ 244 char *m_logname; /* external log device name */ 245 int m_bsize; /* fs logical block size */ 246 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 247 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 248 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 249 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 250 struct xfs_inode *m_inodes; /* active inode list */ 251 struct list_head m_del_inodes; /* inodes to reclaim */ 252 mutex_t m_ilock; /* inode list mutex */ 253 uint m_ireclaims; /* count of calls to reclaim*/ 254 uint m_readio_log; /* min read size log bytes */ 255 uint m_readio_blocks; /* min read size blocks */ 256 uint m_writeio_log; /* min write size log bytes */ 257 uint m_writeio_blocks; /* min write size blocks */ 258 struct log *m_log; /* log specific stuff */ 259 int m_logbufs; /* number of log buffers */ 260 int m_logbsize; /* size of each log buffer */ 261 uint m_rsumlevels; /* rt summary levels */ 262 uint m_rsumsize; /* size of rt summary, bytes */ 263 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 264 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 265 struct xfs_inode *m_rootip; /* pointer to root directory */ 266 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 267 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 268 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 269 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 270 __uint8_t m_dircook_elog; /* log d-cookie entry bits */ 271 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 272 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 273 __uint8_t m_agno_log; /* log #ag's */ 274 __uint8_t m_agino_log; /* #bits for agino in inum */ 275 __uint16_t m_inode_cluster_size;/* min inode buf size */ 276 uint m_blockmask; /* sb_blocksize-1 */ 277 uint m_blockwsize; /* sb_blocksize in words */ 278 uint m_blockwmask; /* blockwsize-1 */ 279 uint m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */ 280 uint m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */ 281 uint m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */ 282 uint m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */ 283 uint m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */ 284 uint m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */ 285 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 286 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 287 uint m_in_maxlevels; /* XFS_IN_MAXLEVELS */ 288 struct xfs_perag *m_perag; /* per-ag accounting info */ 289 struct rw_semaphore m_peraglock; /* lock for m_perag (pointer) */ 290 struct mutex m_growlock; /* growfs mutex */ 291 int m_fixedfsid[2]; /* unchanged for life of FS */ 292 uint m_dmevmask; /* DMI events for this FS */ 293 __uint64_t m_flags; /* global mount flags */ 294 uint m_attroffset; /* inode attribute offset */ 295 uint m_dir_node_ents; /* #entries in a dir danode */ 296 uint m_attr_node_ents; /* #entries in attr danode */ 297 int m_ialloc_inos; /* inodes in inode allocation */ 298 int m_ialloc_blks; /* blocks in inode allocation */ 299 int m_litino; /* size of inode union area */ 300 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 301 uint m_qflags; /* quota status flags */ 302 xfs_trans_reservations_t m_reservations;/* precomputed res values */ 303 __uint64_t m_maxicount; /* maximum inode count */ 304 __uint64_t m_maxioffset; /* maximum inode offset */ 305 __uint64_t m_resblks; /* total reserved blocks */ 306 __uint64_t m_resblks_avail;/* available reserved blocks */ 307 #if XFS_BIG_INUMS 308 xfs_ino_t m_inoadd; /* add value for ino64_offset */ 309 #endif 310 int m_dalign; /* stripe unit */ 311 int m_swidth; /* stripe width */ 312 int m_sinoalign; /* stripe unit inode alignment */ 313 int m_attr_magicpct;/* 37% of the blocksize */ 314 int m_dir_magicpct; /* 37% of the dir blocksize */ 315 __uint8_t m_mk_sharedro; /* mark shared ro on unmount */ 316 __uint8_t m_inode_quiesce;/* call quiesce on new inodes. 317 field governed by m_ilock */ 318 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 319 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 320 int m_dirblksize; /* directory block sz--bytes */ 321 int m_dirblkfsbs; /* directory block sz--fsbs */ 322 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 323 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 324 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 325 uint m_chsize; /* size of next field */ 326 struct xfs_chash *m_chash; /* fs private inode per-cluster 327 * hash table */ 328 struct xfs_dmops *m_dm_ops; /* vector of DMI ops */ 329 struct xfs_qmops *m_qm_ops; /* vector of XQM ops */ 330 atomic_t m_active_trans; /* number trans frozen */ 331 #ifdef HAVE_PERCPU_SB 332 xfs_icsb_cnts_t *m_sb_cnts; /* per-cpu superblock counters */ 333 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 334 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 335 struct mutex m_icsb_mutex; /* balancer sync lock */ 336 #endif 337 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 338 struct task_struct *m_sync_task; /* generalised sync thread */ 339 bhv_vfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */ 340 struct list_head m_sync_list; /* sync thread work item list */ 341 spinlock_t m_sync_lock; /* work item list lock */ 342 int m_sync_seq; /* sync thread generation no. */ 343 wait_queue_head_t m_wait_single_sync_task; 344 } xfs_mount_t; 345 346 /* 347 * Flags for m_flags. 348 */ 349 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 350 must be synchronous except 351 for space allocations */ 352 #define XFS_MOUNT_INO64 (1ULL << 1) 353 #define XFS_MOUNT_DMAPI (1ULL << 2) /* dmapi is enabled */ 354 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 355 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 356 operations, typically for 357 disk errors in metadata */ 358 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to 359 user */ 360 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 361 allocations */ 362 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 363 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 364 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 365 #define XFS_MOUNT_SHARED (1ULL << 11) /* shared mount */ 366 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 367 #define XFS_MOUNT_OSYNCISOSYNC (1ULL << 13) /* o_sync is REALLY o_sync */ 368 /* osyncisdsync is now default*/ 369 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 370 * 32 bits in size */ 371 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 372 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 373 #define XFS_MOUNT_BARRIER (1ULL << 17) 374 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 375 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 376 * allocation */ 377 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 378 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 379 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 380 * I/O size in stat() */ 381 #define XFS_MOUNT_NO_PERCPU_SB (1ULL << 23) /* don't use per-cpu superblock 382 counters */ 383 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 384 allocator */ 385 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 386 387 388 /* 389 * Default minimum read and write sizes. 390 */ 391 #define XFS_READIO_LOG_LARGE 16 392 #define XFS_WRITEIO_LOG_LARGE 16 393 394 /* 395 * Max and min values for mount-option defined I/O 396 * preallocation sizes. 397 */ 398 #define XFS_MAX_IO_LOG 30 /* 1G */ 399 #define XFS_MIN_IO_LOG PAGE_SHIFT 400 401 /* 402 * Synchronous read and write sizes. This should be 403 * better for NFSv2 wsync filesystems. 404 */ 405 #define XFS_WSYNC_READIO_LOG 15 /* 32K */ 406 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16K */ 407 408 /* 409 * Allow large block sizes to be reported to userspace programs if the 410 * "largeio" mount option is used. 411 * 412 * If compatibility mode is specified, simply return the basic unit of caching 413 * so that we don't get inefficient read/modify/write I/O from user apps. 414 * Otherwise.... 415 * 416 * If the underlying volume is a stripe, then return the stripe width in bytes 417 * as the recommended I/O size. It is not a stripe and we've set a default 418 * buffered I/O size, return that, otherwise return the compat default. 419 */ 420 static inline unsigned long 421 xfs_preferred_iosize(xfs_mount_t *mp) 422 { 423 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 424 return PAGE_CACHE_SIZE; 425 return (mp->m_swidth ? 426 (mp->m_swidth << mp->m_sb.sb_blocklog) : 427 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 428 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 429 PAGE_CACHE_SIZE)); 430 } 431 432 #define XFS_MAXIOFFSET(mp) ((mp)->m_maxioffset) 433 434 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 435 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 436 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 437 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 438 int lnnum); 439 #define xfs_force_shutdown(m,f) \ 440 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 441 442 /* 443 * Flags for xfs_mountfs 444 */ 445 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 446 447 #define XFS_DADDR_TO_AGNO(mp,d) xfs_daddr_to_agno(mp,d) 448 static inline xfs_agnumber_t 449 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 450 { 451 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 452 do_div(ld, mp->m_sb.sb_agblocks); 453 return (xfs_agnumber_t) ld; 454 } 455 456 #define XFS_DADDR_TO_AGBNO(mp,d) xfs_daddr_to_agbno(mp,d) 457 static inline xfs_agblock_t 458 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 459 { 460 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 461 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 462 } 463 464 /* 465 * perag get/put wrappers for eventual ref counting 466 */ 467 static inline xfs_perag_t * 468 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino) 469 { 470 return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)]; 471 } 472 473 static inline void 474 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag) 475 { 476 /* nothing to see here, move along */ 477 } 478 479 /* 480 * Per-cpu superblock locking functions 481 */ 482 #ifdef HAVE_PERCPU_SB 483 STATIC_INLINE void 484 xfs_icsb_lock(xfs_mount_t *mp) 485 { 486 mutex_lock(&mp->m_icsb_mutex); 487 } 488 489 STATIC_INLINE void 490 xfs_icsb_unlock(xfs_mount_t *mp) 491 { 492 mutex_unlock(&mp->m_icsb_mutex); 493 } 494 #else 495 #define xfs_icsb_lock(mp) 496 #define xfs_icsb_unlock(mp) 497 #endif 498 499 /* 500 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 501 * xfs_growfs can specify a few fields which are more than int limit 502 */ 503 typedef struct xfs_mod_sb { 504 xfs_sb_field_t msb_field; /* Field to modify, see below */ 505 int64_t msb_delta; /* Change to make to specified field */ 506 } xfs_mod_sb_t; 507 508 #define XFS_MOUNT_ILOCK(mp) mutex_lock(&((mp)->m_ilock)) 509 #define XFS_MOUNT_IUNLOCK(mp) mutex_unlock(&((mp)->m_ilock)) 510 511 extern void xfs_mod_sb(xfs_trans_t *, __int64_t); 512 extern int xfs_log_sbcount(xfs_mount_t *, uint); 513 extern int xfs_mountfs(xfs_mount_t *mp); 514 extern void xfs_mountfs_check_barriers(xfs_mount_t *mp); 515 516 extern void xfs_unmountfs(xfs_mount_t *); 517 extern int xfs_unmountfs_writesb(xfs_mount_t *); 518 extern int xfs_unmount_flush(xfs_mount_t *, int); 519 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 520 extern int xfs_mod_incore_sb_unlocked(xfs_mount_t *, xfs_sb_field_t, 521 int64_t, int); 522 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 523 uint, int); 524 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 525 extern int xfs_readsb(xfs_mount_t *, int); 526 extern void xfs_freesb(xfs_mount_t *); 527 extern int xfs_fs_writable(xfs_mount_t *); 528 extern int xfs_syncsub(xfs_mount_t *, int, int *); 529 extern int xfs_sync_inodes(xfs_mount_t *, int, int *); 530 extern xfs_agnumber_t xfs_initialize_perag(xfs_mount_t *, xfs_agnumber_t); 531 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 532 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 533 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 534 535 extern int xfs_dmops_get(struct xfs_mount *, struct xfs_mount_args *); 536 extern void xfs_dmops_put(struct xfs_mount *); 537 extern int xfs_qmops_get(struct xfs_mount *, struct xfs_mount_args *); 538 extern void xfs_qmops_put(struct xfs_mount *); 539 540 extern struct xfs_dmops xfs_dmcore_xfs; 541 542 #endif /* __KERNEL__ */ 543 544 #endif /* __XFS_MOUNT_H__ */ 545