1 /* 2 * Copyright (c) 2000-2006 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 19 #include "xfs.h" 20 #include "xfs_log.h" 21 #include "xfs_inum.h" 22 #include "xfs_trans.h" 23 #include "xfs_sb.h" 24 #include "xfs_ag.h" 25 #include "xfs_dir2.h" 26 #include "xfs_alloc.h" 27 #include "xfs_quota.h" 28 #include "xfs_mount.h" 29 #include "xfs_bmap_btree.h" 30 #include "xfs_alloc_btree.h" 31 #include "xfs_ialloc_btree.h" 32 #include "xfs_dinode.h" 33 #include "xfs_inode.h" 34 #include "xfs_btree.h" 35 #include "xfs_ialloc.h" 36 #include "xfs_bmap.h" 37 #include "xfs_rtalloc.h" 38 #include "xfs_error.h" 39 #include "xfs_itable.h" 40 #include "xfs_fsops.h" 41 #include "xfs_attr.h" 42 #include "xfs_buf_item.h" 43 #include "xfs_utils.h" 44 #include "xfs_vnodeops.h" 45 #include "xfs_log_priv.h" 46 #include "xfs_trans_priv.h" 47 #include "xfs_filestream.h" 48 #include "xfs_da_btree.h" 49 #include "xfs_extfree_item.h" 50 #include "xfs_mru_cache.h" 51 #include "xfs_inode_item.h" 52 #include "xfs_icache.h" 53 #include "xfs_trace.h" 54 #include "xfs_icreate_item.h" 55 56 #include <linux/namei.h> 57 #include <linux/init.h> 58 #include <linux/slab.h> 59 #include <linux/mount.h> 60 #include <linux/mempool.h> 61 #include <linux/writeback.h> 62 #include <linux/kthread.h> 63 #include <linux/freezer.h> 64 #include <linux/parser.h> 65 66 static const struct super_operations xfs_super_operations; 67 static kmem_zone_t *xfs_ioend_zone; 68 mempool_t *xfs_ioend_pool; 69 70 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ 71 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ 72 #define MNTOPT_LOGDEV "logdev" /* log device */ 73 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ 74 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ 75 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ 76 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ 77 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ 78 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ 79 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ 80 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ 81 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ 82 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ 83 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ 84 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ 85 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ 86 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ 87 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ 88 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and 89 * unwritten extent conversion */ 90 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ 91 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ 92 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to 93 * XFS_MAXINUMBER_32 */ 94 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ 95 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ 96 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ 97 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes 98 * in stat(). */ 99 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ 100 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ 101 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ 102 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ 103 #define MNTOPT_NOQUOTA "noquota" /* no quotas */ 104 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ 105 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ 106 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ 107 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ 108 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ 109 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ 110 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ 111 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ 112 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ 113 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ 114 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */ 115 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */ 116 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ 117 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ 118 119 /* 120 * Table driven mount option parser. 121 * 122 * Currently only used for remount, but it will be used for mount 123 * in the future, too. 124 */ 125 enum { 126 Opt_barrier, 127 Opt_nobarrier, 128 Opt_inode64, 129 Opt_inode32, 130 Opt_err 131 }; 132 133 static const match_table_t tokens = { 134 {Opt_barrier, "barrier"}, 135 {Opt_nobarrier, "nobarrier"}, 136 {Opt_inode64, "inode64"}, 137 {Opt_inode32, "inode32"}, 138 {Opt_err, NULL} 139 }; 140 141 142 STATIC unsigned long 143 suffix_kstrtoint(char *s, unsigned int base, int *res) 144 { 145 int last, shift_left_factor = 0, _res; 146 char *value = s; 147 148 last = strlen(value) - 1; 149 if (value[last] == 'K' || value[last] == 'k') { 150 shift_left_factor = 10; 151 value[last] = '\0'; 152 } 153 if (value[last] == 'M' || value[last] == 'm') { 154 shift_left_factor = 20; 155 value[last] = '\0'; 156 } 157 if (value[last] == 'G' || value[last] == 'g') { 158 shift_left_factor = 30; 159 value[last] = '\0'; 160 } 161 162 if (kstrtoint(s, base, &_res)) 163 return -EINVAL; 164 *res = _res << shift_left_factor; 165 return 0; 166 } 167 168 /* 169 * This function fills in xfs_mount_t fields based on mount args. 170 * Note: the superblock has _not_ yet been read in. 171 * 172 * Note that this function leaks the various device name allocations on 173 * failure. The caller takes care of them. 174 */ 175 STATIC int 176 xfs_parseargs( 177 struct xfs_mount *mp, 178 char *options) 179 { 180 struct super_block *sb = mp->m_super; 181 char *this_char, *value; 182 int dsunit = 0; 183 int dswidth = 0; 184 int iosize = 0; 185 __uint8_t iosizelog = 0; 186 187 /* 188 * set up the mount name first so all the errors will refer to the 189 * correct device. 190 */ 191 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 192 if (!mp->m_fsname) 193 return ENOMEM; 194 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 195 196 /* 197 * Copy binary VFS mount flags we are interested in. 198 */ 199 if (sb->s_flags & MS_RDONLY) 200 mp->m_flags |= XFS_MOUNT_RDONLY; 201 if (sb->s_flags & MS_DIRSYNC) 202 mp->m_flags |= XFS_MOUNT_DIRSYNC; 203 if (sb->s_flags & MS_SYNCHRONOUS) 204 mp->m_flags |= XFS_MOUNT_WSYNC; 205 206 /* 207 * Set some default flags that could be cleared by the mount option 208 * parsing. 209 */ 210 mp->m_flags |= XFS_MOUNT_BARRIER; 211 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 212 #if !XFS_BIG_INUMS 213 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 214 #endif 215 216 /* 217 * These can be overridden by the mount option parsing. 218 */ 219 mp->m_logbufs = -1; 220 mp->m_logbsize = -1; 221 222 if (!options) 223 goto done; 224 225 while ((this_char = strsep(&options, ",")) != NULL) { 226 if (!*this_char) 227 continue; 228 if ((value = strchr(this_char, '=')) != NULL) 229 *value++ = 0; 230 231 if (!strcmp(this_char, MNTOPT_LOGBUFS)) { 232 if (!value || !*value) { 233 xfs_warn(mp, "%s option requires an argument", 234 this_char); 235 return EINVAL; 236 } 237 if (kstrtoint(value, 10, &mp->m_logbufs)) 238 return EINVAL; 239 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { 240 if (!value || !*value) { 241 xfs_warn(mp, "%s option requires an argument", 242 this_char); 243 return EINVAL; 244 } 245 if (suffix_kstrtoint(value, 10, &mp->m_logbsize)) 246 return EINVAL; 247 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { 248 if (!value || !*value) { 249 xfs_warn(mp, "%s option requires an argument", 250 this_char); 251 return EINVAL; 252 } 253 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 254 if (!mp->m_logname) 255 return ENOMEM; 256 } else if (!strcmp(this_char, MNTOPT_MTPT)) { 257 xfs_warn(mp, "%s option not allowed on this system", 258 this_char); 259 return EINVAL; 260 } else if (!strcmp(this_char, MNTOPT_RTDEV)) { 261 if (!value || !*value) { 262 xfs_warn(mp, "%s option requires an argument", 263 this_char); 264 return EINVAL; 265 } 266 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 267 if (!mp->m_rtname) 268 return ENOMEM; 269 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { 270 if (!value || !*value) { 271 xfs_warn(mp, "%s option requires an argument", 272 this_char); 273 return EINVAL; 274 } 275 if (kstrtoint(value, 10, &iosize)) 276 return EINVAL; 277 iosizelog = ffs(iosize) - 1; 278 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { 279 if (!value || !*value) { 280 xfs_warn(mp, "%s option requires an argument", 281 this_char); 282 return EINVAL; 283 } 284 if (suffix_kstrtoint(value, 10, &iosize)) 285 return EINVAL; 286 iosizelog = ffs(iosize) - 1; 287 } else if (!strcmp(this_char, MNTOPT_GRPID) || 288 !strcmp(this_char, MNTOPT_BSDGROUPS)) { 289 mp->m_flags |= XFS_MOUNT_GRPID; 290 } else if (!strcmp(this_char, MNTOPT_NOGRPID) || 291 !strcmp(this_char, MNTOPT_SYSVGROUPS)) { 292 mp->m_flags &= ~XFS_MOUNT_GRPID; 293 } else if (!strcmp(this_char, MNTOPT_WSYNC)) { 294 mp->m_flags |= XFS_MOUNT_WSYNC; 295 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { 296 mp->m_flags |= XFS_MOUNT_NORECOVERY; 297 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { 298 mp->m_flags |= XFS_MOUNT_NOALIGN; 299 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { 300 mp->m_flags |= XFS_MOUNT_SWALLOC; 301 } else if (!strcmp(this_char, MNTOPT_SUNIT)) { 302 if (!value || !*value) { 303 xfs_warn(mp, "%s option requires an argument", 304 this_char); 305 return EINVAL; 306 } 307 if (kstrtoint(value, 10, &dsunit)) 308 return EINVAL; 309 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { 310 if (!value || !*value) { 311 xfs_warn(mp, "%s option requires an argument", 312 this_char); 313 return EINVAL; 314 } 315 if (kstrtoint(value, 10, &dswidth)) 316 return EINVAL; 317 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) { 318 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 319 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { 320 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 321 #if !XFS_BIG_INUMS 322 xfs_warn(mp, "%s option not allowed on this system", 323 this_char); 324 return EINVAL; 325 #endif 326 } else if (!strcmp(this_char, MNTOPT_NOUUID)) { 327 mp->m_flags |= XFS_MOUNT_NOUUID; 328 } else if (!strcmp(this_char, MNTOPT_BARRIER)) { 329 mp->m_flags |= XFS_MOUNT_BARRIER; 330 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { 331 mp->m_flags &= ~XFS_MOUNT_BARRIER; 332 } else if (!strcmp(this_char, MNTOPT_IKEEP)) { 333 mp->m_flags |= XFS_MOUNT_IKEEP; 334 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { 335 mp->m_flags &= ~XFS_MOUNT_IKEEP; 336 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { 337 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 338 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { 339 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 340 } else if (!strcmp(this_char, MNTOPT_ATTR2)) { 341 mp->m_flags |= XFS_MOUNT_ATTR2; 342 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { 343 mp->m_flags &= ~XFS_MOUNT_ATTR2; 344 mp->m_flags |= XFS_MOUNT_NOATTR2; 345 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { 346 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 347 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { 348 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 349 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 350 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 351 } else if (!strcmp(this_char, MNTOPT_QUOTA) || 352 !strcmp(this_char, MNTOPT_UQUOTA) || 353 !strcmp(this_char, MNTOPT_USRQUOTA)) { 354 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 355 XFS_UQUOTA_ENFD); 356 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || 357 !strcmp(this_char, MNTOPT_UQUOTANOENF)) { 358 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 359 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 360 } else if (!strcmp(this_char, MNTOPT_PQUOTA) || 361 !strcmp(this_char, MNTOPT_PRJQUOTA)) { 362 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 363 XFS_PQUOTA_ENFD); 364 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { 365 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 366 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 367 } else if (!strcmp(this_char, MNTOPT_GQUOTA) || 368 !strcmp(this_char, MNTOPT_GRPQUOTA)) { 369 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 370 XFS_GQUOTA_ENFD); 371 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { 372 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 373 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 374 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { 375 xfs_warn(mp, 376 "delaylog is the default now, option is deprecated."); 377 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { 378 xfs_warn(mp, 379 "nodelaylog support has been removed, option is deprecated."); 380 } else if (!strcmp(this_char, MNTOPT_DISCARD)) { 381 mp->m_flags |= XFS_MOUNT_DISCARD; 382 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { 383 mp->m_flags &= ~XFS_MOUNT_DISCARD; 384 } else if (!strcmp(this_char, "ihashsize")) { 385 xfs_warn(mp, 386 "ihashsize no longer used, option is deprecated."); 387 } else if (!strcmp(this_char, "osyncisdsync")) { 388 xfs_warn(mp, 389 "osyncisdsync has no effect, option is deprecated."); 390 } else if (!strcmp(this_char, "osyncisosync")) { 391 xfs_warn(mp, 392 "osyncisosync has no effect, option is deprecated."); 393 } else if (!strcmp(this_char, "irixsgid")) { 394 xfs_warn(mp, 395 "irixsgid is now a sysctl(2) variable, option is deprecated."); 396 } else { 397 xfs_warn(mp, "unknown mount option [%s].", this_char); 398 return EINVAL; 399 } 400 } 401 402 /* 403 * no recovery flag requires a read-only mount 404 */ 405 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 406 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 407 xfs_warn(mp, "no-recovery mounts must be read-only."); 408 return EINVAL; 409 } 410 411 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 412 xfs_warn(mp, 413 "sunit and swidth options incompatible with the noalign option"); 414 return EINVAL; 415 } 416 417 #ifndef CONFIG_XFS_QUOTA 418 if (XFS_IS_QUOTA_RUNNING(mp)) { 419 xfs_warn(mp, "quota support not available in this kernel."); 420 return EINVAL; 421 } 422 #endif 423 424 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 425 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) { 426 xfs_warn(mp, "cannot mount with both project and group quota"); 427 return EINVAL; 428 } 429 430 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 431 xfs_warn(mp, "sunit and swidth must be specified together"); 432 return EINVAL; 433 } 434 435 if (dsunit && (dswidth % dsunit != 0)) { 436 xfs_warn(mp, 437 "stripe width (%d) must be a multiple of the stripe unit (%d)", 438 dswidth, dsunit); 439 return EINVAL; 440 } 441 442 done: 443 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { 444 /* 445 * At this point the superblock has not been read 446 * in, therefore we do not know the block size. 447 * Before the mount call ends we will convert 448 * these to FSBs. 449 */ 450 mp->m_dalign = dsunit; 451 mp->m_swidth = dswidth; 452 } 453 454 if (mp->m_logbufs != -1 && 455 mp->m_logbufs != 0 && 456 (mp->m_logbufs < XLOG_MIN_ICLOGS || 457 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 458 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 459 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 460 return XFS_ERROR(EINVAL); 461 } 462 if (mp->m_logbsize != -1 && 463 mp->m_logbsize != 0 && 464 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 465 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 466 !is_power_of_2(mp->m_logbsize))) { 467 xfs_warn(mp, 468 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 469 mp->m_logbsize); 470 return XFS_ERROR(EINVAL); 471 } 472 473 if (iosizelog) { 474 if (iosizelog > XFS_MAX_IO_LOG || 475 iosizelog < XFS_MIN_IO_LOG) { 476 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 477 iosizelog, XFS_MIN_IO_LOG, 478 XFS_MAX_IO_LOG); 479 return XFS_ERROR(EINVAL); 480 } 481 482 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 483 mp->m_readio_log = iosizelog; 484 mp->m_writeio_log = iosizelog; 485 } 486 487 return 0; 488 } 489 490 struct proc_xfs_info { 491 int flag; 492 char *str; 493 }; 494 495 STATIC int 496 xfs_showargs( 497 struct xfs_mount *mp, 498 struct seq_file *m) 499 { 500 static struct proc_xfs_info xfs_info_set[] = { 501 /* the few simple ones we can get from the mount struct */ 502 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP }, 503 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, 504 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, 505 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, 506 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, 507 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, 508 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, 509 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, 510 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, 511 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, 512 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE }, 513 { 0, NULL } 514 }; 515 static struct proc_xfs_info xfs_info_unset[] = { 516 /* the few simple ones we can get from the mount struct */ 517 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO }, 518 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, 519 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, 520 { 0, NULL } 521 }; 522 struct proc_xfs_info *xfs_infop; 523 524 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 525 if (mp->m_flags & xfs_infop->flag) 526 seq_puts(m, xfs_infop->str); 527 } 528 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 529 if (!(mp->m_flags & xfs_infop->flag)) 530 seq_puts(m, xfs_infop->str); 531 } 532 533 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 534 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", 535 (int)(1 << mp->m_writeio_log) >> 10); 536 537 if (mp->m_logbufs > 0) 538 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); 539 if (mp->m_logbsize > 0) 540 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); 541 542 if (mp->m_logname) 543 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); 544 if (mp->m_rtname) 545 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); 546 547 if (mp->m_dalign > 0) 548 seq_printf(m, "," MNTOPT_SUNIT "=%d", 549 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 550 if (mp->m_swidth > 0) 551 seq_printf(m, "," MNTOPT_SWIDTH "=%d", 552 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 553 554 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 555 seq_puts(m, "," MNTOPT_USRQUOTA); 556 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 557 seq_puts(m, "," MNTOPT_UQUOTANOENF); 558 559 /* Either project or group quotas can be active, not both */ 560 561 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 562 if (mp->m_qflags & XFS_PQUOTA_ENFD) 563 seq_puts(m, "," MNTOPT_PRJQUOTA); 564 else 565 seq_puts(m, "," MNTOPT_PQUOTANOENF); 566 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) { 567 if (mp->m_qflags & XFS_GQUOTA_ENFD) 568 seq_puts(m, "," MNTOPT_GRPQUOTA); 569 else 570 seq_puts(m, "," MNTOPT_GQUOTANOENF); 571 } 572 573 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 574 seq_puts(m, "," MNTOPT_NOQUOTA); 575 576 return 0; 577 } 578 __uint64_t 579 xfs_max_file_offset( 580 unsigned int blockshift) 581 { 582 unsigned int pagefactor = 1; 583 unsigned int bitshift = BITS_PER_LONG - 1; 584 585 /* Figure out maximum filesize, on Linux this can depend on 586 * the filesystem blocksize (on 32 bit platforms). 587 * __block_write_begin does this in an [unsigned] long... 588 * page->index << (PAGE_CACHE_SHIFT - bbits) 589 * So, for page sized blocks (4K on 32 bit platforms), 590 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 591 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 592 * but for smaller blocksizes it is less (bbits = log2 bsize). 593 * Note1: get_block_t takes a long (implicit cast from above) 594 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 595 * can optionally convert the [unsigned] long from above into 596 * an [unsigned] long long. 597 */ 598 599 #if BITS_PER_LONG == 32 600 # if defined(CONFIG_LBDAF) 601 ASSERT(sizeof(sector_t) == 8); 602 pagefactor = PAGE_CACHE_SIZE; 603 bitshift = BITS_PER_LONG; 604 # else 605 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 606 # endif 607 #endif 608 609 return (((__uint64_t)pagefactor) << bitshift) - 1; 610 } 611 612 xfs_agnumber_t 613 xfs_set_inode32(struct xfs_mount *mp) 614 { 615 xfs_agnumber_t index = 0; 616 xfs_agnumber_t maxagi = 0; 617 xfs_sb_t *sbp = &mp->m_sb; 618 xfs_agnumber_t max_metadata; 619 xfs_agino_t agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0); 620 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino); 621 xfs_perag_t *pag; 622 623 /* Calculate how much should be reserved for inodes to meet 624 * the max inode percentage. 625 */ 626 if (mp->m_maxicount) { 627 __uint64_t icount; 628 629 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 630 do_div(icount, 100); 631 icount += sbp->sb_agblocks - 1; 632 do_div(icount, sbp->sb_agblocks); 633 max_metadata = icount; 634 } else { 635 max_metadata = sbp->sb_agcount; 636 } 637 638 for (index = 0; index < sbp->sb_agcount; index++) { 639 ino = XFS_AGINO_TO_INO(mp, index, agino); 640 641 if (ino > XFS_MAXINUMBER_32) { 642 pag = xfs_perag_get(mp, index); 643 pag->pagi_inodeok = 0; 644 pag->pagf_metadata = 0; 645 xfs_perag_put(pag); 646 continue; 647 } 648 649 pag = xfs_perag_get(mp, index); 650 pag->pagi_inodeok = 1; 651 maxagi++; 652 if (index < max_metadata) 653 pag->pagf_metadata = 1; 654 xfs_perag_put(pag); 655 } 656 mp->m_flags |= (XFS_MOUNT_32BITINODES | 657 XFS_MOUNT_SMALL_INUMS); 658 659 return maxagi; 660 } 661 662 xfs_agnumber_t 663 xfs_set_inode64(struct xfs_mount *mp) 664 { 665 xfs_agnumber_t index = 0; 666 667 for (index = 0; index < mp->m_sb.sb_agcount; index++) { 668 struct xfs_perag *pag; 669 670 pag = xfs_perag_get(mp, index); 671 pag->pagi_inodeok = 1; 672 pag->pagf_metadata = 0; 673 xfs_perag_put(pag); 674 } 675 676 /* There is no need for lock protection on m_flags, 677 * the rw_semaphore of the VFS superblock is locked 678 * during mount/umount/remount operations, so this is 679 * enough to avoid concurency on the m_flags field 680 */ 681 mp->m_flags &= ~(XFS_MOUNT_32BITINODES | 682 XFS_MOUNT_SMALL_INUMS); 683 return index; 684 } 685 686 STATIC int 687 xfs_blkdev_get( 688 xfs_mount_t *mp, 689 const char *name, 690 struct block_device **bdevp) 691 { 692 int error = 0; 693 694 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 695 mp); 696 if (IS_ERR(*bdevp)) { 697 error = PTR_ERR(*bdevp); 698 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error); 699 } 700 701 return -error; 702 } 703 704 STATIC void 705 xfs_blkdev_put( 706 struct block_device *bdev) 707 { 708 if (bdev) 709 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 710 } 711 712 void 713 xfs_blkdev_issue_flush( 714 xfs_buftarg_t *buftarg) 715 { 716 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 717 } 718 719 STATIC void 720 xfs_close_devices( 721 struct xfs_mount *mp) 722 { 723 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 724 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 725 xfs_free_buftarg(mp, mp->m_logdev_targp); 726 xfs_blkdev_put(logdev); 727 } 728 if (mp->m_rtdev_targp) { 729 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 730 xfs_free_buftarg(mp, mp->m_rtdev_targp); 731 xfs_blkdev_put(rtdev); 732 } 733 xfs_free_buftarg(mp, mp->m_ddev_targp); 734 } 735 736 /* 737 * The file system configurations are: 738 * (1) device (partition) with data and internal log 739 * (2) logical volume with data and log subvolumes. 740 * (3) logical volume with data, log, and realtime subvolumes. 741 * 742 * We only have to handle opening the log and realtime volumes here if 743 * they are present. The data subvolume has already been opened by 744 * get_sb_bdev() and is stored in sb->s_bdev. 745 */ 746 STATIC int 747 xfs_open_devices( 748 struct xfs_mount *mp) 749 { 750 struct block_device *ddev = mp->m_super->s_bdev; 751 struct block_device *logdev = NULL, *rtdev = NULL; 752 int error; 753 754 /* 755 * Open real time and log devices - order is important. 756 */ 757 if (mp->m_logname) { 758 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 759 if (error) 760 goto out; 761 } 762 763 if (mp->m_rtname) { 764 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 765 if (error) 766 goto out_close_logdev; 767 768 if (rtdev == ddev || rtdev == logdev) { 769 xfs_warn(mp, 770 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 771 error = EINVAL; 772 goto out_close_rtdev; 773 } 774 } 775 776 /* 777 * Setup xfs_mount buffer target pointers 778 */ 779 error = ENOMEM; 780 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname); 781 if (!mp->m_ddev_targp) 782 goto out_close_rtdev; 783 784 if (rtdev) { 785 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1, 786 mp->m_fsname); 787 if (!mp->m_rtdev_targp) 788 goto out_free_ddev_targ; 789 } 790 791 if (logdev && logdev != ddev) { 792 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1, 793 mp->m_fsname); 794 if (!mp->m_logdev_targp) 795 goto out_free_rtdev_targ; 796 } else { 797 mp->m_logdev_targp = mp->m_ddev_targp; 798 } 799 800 return 0; 801 802 out_free_rtdev_targ: 803 if (mp->m_rtdev_targp) 804 xfs_free_buftarg(mp, mp->m_rtdev_targp); 805 out_free_ddev_targ: 806 xfs_free_buftarg(mp, mp->m_ddev_targp); 807 out_close_rtdev: 808 if (rtdev) 809 xfs_blkdev_put(rtdev); 810 out_close_logdev: 811 if (logdev && logdev != ddev) 812 xfs_blkdev_put(logdev); 813 out: 814 return error; 815 } 816 817 /* 818 * Setup xfs_mount buffer target pointers based on superblock 819 */ 820 STATIC int 821 xfs_setup_devices( 822 struct xfs_mount *mp) 823 { 824 int error; 825 826 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize, 827 mp->m_sb.sb_sectsize); 828 if (error) 829 return error; 830 831 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 832 unsigned int log_sector_size = BBSIZE; 833 834 if (xfs_sb_version_hassector(&mp->m_sb)) 835 log_sector_size = mp->m_sb.sb_logsectsize; 836 error = xfs_setsize_buftarg(mp->m_logdev_targp, 837 mp->m_sb.sb_blocksize, 838 log_sector_size); 839 if (error) 840 return error; 841 } 842 if (mp->m_rtdev_targp) { 843 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 844 mp->m_sb.sb_blocksize, 845 mp->m_sb.sb_sectsize); 846 if (error) 847 return error; 848 } 849 850 return 0; 851 } 852 853 STATIC int 854 xfs_init_mount_workqueues( 855 struct xfs_mount *mp) 856 { 857 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 858 WQ_MEM_RECLAIM, 0, mp->m_fsname); 859 if (!mp->m_data_workqueue) 860 goto out; 861 862 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 863 WQ_MEM_RECLAIM, 0, mp->m_fsname); 864 if (!mp->m_unwritten_workqueue) 865 goto out_destroy_data_iodone_queue; 866 867 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 868 WQ_MEM_RECLAIM, 0, mp->m_fsname); 869 if (!mp->m_cil_workqueue) 870 goto out_destroy_unwritten; 871 872 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 873 WQ_NON_REENTRANT, 0, mp->m_fsname); 874 if (!mp->m_reclaim_workqueue) 875 goto out_destroy_cil; 876 877 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", 878 WQ_NON_REENTRANT, 0, mp->m_fsname); 879 if (!mp->m_log_workqueue) 880 goto out_destroy_reclaim; 881 882 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", 883 WQ_NON_REENTRANT, 0, mp->m_fsname); 884 if (!mp->m_eofblocks_workqueue) 885 goto out_destroy_log; 886 887 return 0; 888 889 out_destroy_log: 890 destroy_workqueue(mp->m_log_workqueue); 891 out_destroy_reclaim: 892 destroy_workqueue(mp->m_reclaim_workqueue); 893 out_destroy_cil: 894 destroy_workqueue(mp->m_cil_workqueue); 895 out_destroy_unwritten: 896 destroy_workqueue(mp->m_unwritten_workqueue); 897 out_destroy_data_iodone_queue: 898 destroy_workqueue(mp->m_data_workqueue); 899 out: 900 return -ENOMEM; 901 } 902 903 STATIC void 904 xfs_destroy_mount_workqueues( 905 struct xfs_mount *mp) 906 { 907 destroy_workqueue(mp->m_eofblocks_workqueue); 908 destroy_workqueue(mp->m_log_workqueue); 909 destroy_workqueue(mp->m_reclaim_workqueue); 910 destroy_workqueue(mp->m_cil_workqueue); 911 destroy_workqueue(mp->m_data_workqueue); 912 destroy_workqueue(mp->m_unwritten_workqueue); 913 } 914 915 /* 916 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 917 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 918 * for IO to complete so that we effectively throttle multiple callers to the 919 * rate at which IO is completing. 920 */ 921 void 922 xfs_flush_inodes( 923 struct xfs_mount *mp) 924 { 925 struct super_block *sb = mp->m_super; 926 927 if (down_read_trylock(&sb->s_umount)) { 928 sync_inodes_sb(sb); 929 up_read(&sb->s_umount); 930 } 931 } 932 933 /* Catch misguided souls that try to use this interface on XFS */ 934 STATIC struct inode * 935 xfs_fs_alloc_inode( 936 struct super_block *sb) 937 { 938 BUG(); 939 return NULL; 940 } 941 942 /* 943 * Now that the generic code is guaranteed not to be accessing 944 * the linux inode, we can reclaim the inode. 945 */ 946 STATIC void 947 xfs_fs_destroy_inode( 948 struct inode *inode) 949 { 950 struct xfs_inode *ip = XFS_I(inode); 951 952 trace_xfs_destroy_inode(ip); 953 954 XFS_STATS_INC(vn_reclaim); 955 956 /* bad inode, get out here ASAP */ 957 if (is_bad_inode(inode)) 958 goto out_reclaim; 959 960 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 961 962 /* 963 * We should never get here with one of the reclaim flags already set. 964 */ 965 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 966 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 967 968 /* 969 * We always use background reclaim here because even if the 970 * inode is clean, it still may be under IO and hence we have 971 * to take the flush lock. The background reclaim path handles 972 * this more efficiently than we can here, so simply let background 973 * reclaim tear down all inodes. 974 */ 975 out_reclaim: 976 xfs_inode_set_reclaim_tag(ip); 977 } 978 979 /* 980 * Slab object creation initialisation for the XFS inode. 981 * This covers only the idempotent fields in the XFS inode; 982 * all other fields need to be initialised on allocation 983 * from the slab. This avoids the need to repeatedly initialise 984 * fields in the xfs inode that left in the initialise state 985 * when freeing the inode. 986 */ 987 STATIC void 988 xfs_fs_inode_init_once( 989 void *inode) 990 { 991 struct xfs_inode *ip = inode; 992 993 memset(ip, 0, sizeof(struct xfs_inode)); 994 995 /* vfs inode */ 996 inode_init_once(VFS_I(ip)); 997 998 /* xfs inode */ 999 atomic_set(&ip->i_pincount, 0); 1000 spin_lock_init(&ip->i_flags_lock); 1001 1002 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 1003 "xfsino", ip->i_ino); 1004 } 1005 1006 STATIC void 1007 xfs_fs_evict_inode( 1008 struct inode *inode) 1009 { 1010 xfs_inode_t *ip = XFS_I(inode); 1011 1012 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 1013 1014 trace_xfs_evict_inode(ip); 1015 1016 truncate_inode_pages(&inode->i_data, 0); 1017 clear_inode(inode); 1018 XFS_STATS_INC(vn_rele); 1019 XFS_STATS_INC(vn_remove); 1020 XFS_STATS_DEC(vn_active); 1021 1022 xfs_inactive(ip); 1023 } 1024 1025 /* 1026 * We do an unlocked check for XFS_IDONTCACHE here because we are already 1027 * serialised against cache hits here via the inode->i_lock and igrab() in 1028 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 1029 * racing with us, and it avoids needing to grab a spinlock here for every inode 1030 * we drop the final reference on. 1031 */ 1032 STATIC int 1033 xfs_fs_drop_inode( 1034 struct inode *inode) 1035 { 1036 struct xfs_inode *ip = XFS_I(inode); 1037 1038 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 1039 } 1040 1041 STATIC void 1042 xfs_free_fsname( 1043 struct xfs_mount *mp) 1044 { 1045 kfree(mp->m_fsname); 1046 kfree(mp->m_rtname); 1047 kfree(mp->m_logname); 1048 } 1049 1050 STATIC void 1051 xfs_fs_put_super( 1052 struct super_block *sb) 1053 { 1054 struct xfs_mount *mp = XFS_M(sb); 1055 1056 xfs_filestream_unmount(mp); 1057 xfs_unmountfs(mp); 1058 1059 xfs_freesb(mp); 1060 xfs_icsb_destroy_counters(mp); 1061 xfs_destroy_mount_workqueues(mp); 1062 xfs_close_devices(mp); 1063 xfs_free_fsname(mp); 1064 kfree(mp); 1065 } 1066 1067 STATIC int 1068 xfs_fs_sync_fs( 1069 struct super_block *sb, 1070 int wait) 1071 { 1072 struct xfs_mount *mp = XFS_M(sb); 1073 1074 /* 1075 * Doing anything during the async pass would be counterproductive. 1076 */ 1077 if (!wait) 1078 return 0; 1079 1080 xfs_log_force(mp, XFS_LOG_SYNC); 1081 if (laptop_mode) { 1082 /* 1083 * The disk must be active because we're syncing. 1084 * We schedule log work now (now that the disk is 1085 * active) instead of later (when it might not be). 1086 */ 1087 flush_delayed_work(&mp->m_log->l_work); 1088 } 1089 1090 return 0; 1091 } 1092 1093 STATIC int 1094 xfs_fs_statfs( 1095 struct dentry *dentry, 1096 struct kstatfs *statp) 1097 { 1098 struct xfs_mount *mp = XFS_M(dentry->d_sb); 1099 xfs_sb_t *sbp = &mp->m_sb; 1100 struct xfs_inode *ip = XFS_I(dentry->d_inode); 1101 __uint64_t fakeinos, id; 1102 xfs_extlen_t lsize; 1103 __int64_t ffree; 1104 1105 statp->f_type = XFS_SB_MAGIC; 1106 statp->f_namelen = MAXNAMELEN - 1; 1107 1108 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 1109 statp->f_fsid.val[0] = (u32)id; 1110 statp->f_fsid.val[1] = (u32)(id >> 32); 1111 1112 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 1113 1114 spin_lock(&mp->m_sb_lock); 1115 statp->f_bsize = sbp->sb_blocksize; 1116 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 1117 statp->f_blocks = sbp->sb_dblocks - lsize; 1118 statp->f_bfree = statp->f_bavail = 1119 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 1120 fakeinos = statp->f_bfree << sbp->sb_inopblog; 1121 statp->f_files = 1122 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 1123 if (mp->m_maxicount) 1124 statp->f_files = min_t(typeof(statp->f_files), 1125 statp->f_files, 1126 mp->m_maxicount); 1127 1128 /* make sure statp->f_ffree does not underflow */ 1129 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); 1130 statp->f_ffree = max_t(__int64_t, ffree, 0); 1131 1132 spin_unlock(&mp->m_sb_lock); 1133 1134 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1135 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 1136 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 1137 xfs_qm_statvfs(ip, statp); 1138 return 0; 1139 } 1140 1141 STATIC void 1142 xfs_save_resvblks(struct xfs_mount *mp) 1143 { 1144 __uint64_t resblks = 0; 1145 1146 mp->m_resblks_save = mp->m_resblks; 1147 xfs_reserve_blocks(mp, &resblks, NULL); 1148 } 1149 1150 STATIC void 1151 xfs_restore_resvblks(struct xfs_mount *mp) 1152 { 1153 __uint64_t resblks; 1154 1155 if (mp->m_resblks_save) { 1156 resblks = mp->m_resblks_save; 1157 mp->m_resblks_save = 0; 1158 } else 1159 resblks = xfs_default_resblks(mp); 1160 1161 xfs_reserve_blocks(mp, &resblks, NULL); 1162 } 1163 1164 /* 1165 * Trigger writeback of all the dirty metadata in the file system. 1166 * 1167 * This ensures that the metadata is written to their location on disk rather 1168 * than just existing in transactions in the log. This means after a quiesce 1169 * there is no log replay required to write the inodes to disk - this is the 1170 * primary difference between a sync and a quiesce. 1171 * 1172 * Note: xfs_log_quiesce() stops background log work - the callers must ensure 1173 * it is started again when appropriate. 1174 */ 1175 void 1176 xfs_quiesce_attr( 1177 struct xfs_mount *mp) 1178 { 1179 int error = 0; 1180 1181 /* wait for all modifications to complete */ 1182 while (atomic_read(&mp->m_active_trans) > 0) 1183 delay(100); 1184 1185 /* force the log to unpin objects from the now complete transactions */ 1186 xfs_log_force(mp, XFS_LOG_SYNC); 1187 1188 /* reclaim inodes to do any IO before the freeze completes */ 1189 xfs_reclaim_inodes(mp, 0); 1190 xfs_reclaim_inodes(mp, SYNC_WAIT); 1191 1192 /* Push the superblock and write an unmount record */ 1193 error = xfs_log_sbcount(mp); 1194 if (error) 1195 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " 1196 "Frozen image may not be consistent."); 1197 /* 1198 * Just warn here till VFS can correctly support 1199 * read-only remount without racing. 1200 */ 1201 WARN_ON(atomic_read(&mp->m_active_trans) != 0); 1202 1203 xfs_log_quiesce(mp); 1204 } 1205 1206 STATIC int 1207 xfs_fs_remount( 1208 struct super_block *sb, 1209 int *flags, 1210 char *options) 1211 { 1212 struct xfs_mount *mp = XFS_M(sb); 1213 substring_t args[MAX_OPT_ARGS]; 1214 char *p; 1215 int error; 1216 1217 while ((p = strsep(&options, ",")) != NULL) { 1218 int token; 1219 1220 if (!*p) 1221 continue; 1222 1223 token = match_token(p, tokens, args); 1224 switch (token) { 1225 case Opt_barrier: 1226 mp->m_flags |= XFS_MOUNT_BARRIER; 1227 break; 1228 case Opt_nobarrier: 1229 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1230 break; 1231 case Opt_inode64: 1232 mp->m_maxagi = xfs_set_inode64(mp); 1233 break; 1234 case Opt_inode32: 1235 mp->m_maxagi = xfs_set_inode32(mp); 1236 break; 1237 default: 1238 /* 1239 * Logically we would return an error here to prevent 1240 * users from believing they might have changed 1241 * mount options using remount which can't be changed. 1242 * 1243 * But unfortunately mount(8) adds all options from 1244 * mtab and fstab to the mount arguments in some cases 1245 * so we can't blindly reject options, but have to 1246 * check for each specified option if it actually 1247 * differs from the currently set option and only 1248 * reject it if that's the case. 1249 * 1250 * Until that is implemented we return success for 1251 * every remount request, and silently ignore all 1252 * options that we can't actually change. 1253 */ 1254 #if 0 1255 xfs_info(mp, 1256 "mount option \"%s\" not supported for remount\n", p); 1257 return -EINVAL; 1258 #else 1259 break; 1260 #endif 1261 } 1262 } 1263 1264 /* ro -> rw */ 1265 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1266 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1267 1268 /* 1269 * If this is the first remount to writeable state we 1270 * might have some superblock changes to update. 1271 */ 1272 if (mp->m_update_flags) { 1273 error = xfs_mount_log_sb(mp, mp->m_update_flags); 1274 if (error) { 1275 xfs_warn(mp, "failed to write sb changes"); 1276 return error; 1277 } 1278 mp->m_update_flags = 0; 1279 } 1280 1281 /* 1282 * Fill out the reserve pool if it is empty. Use the stashed 1283 * value if it is non-zero, otherwise go with the default. 1284 */ 1285 xfs_restore_resvblks(mp); 1286 xfs_log_work_queue(mp); 1287 } 1288 1289 /* rw -> ro */ 1290 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1291 /* 1292 * Before we sync the metadata, we need to free up the reserve 1293 * block pool so that the used block count in the superblock on 1294 * disk is correct at the end of the remount. Stash the current 1295 * reserve pool size so that if we get remounted rw, we can 1296 * return it to the same size. 1297 */ 1298 xfs_save_resvblks(mp); 1299 xfs_quiesce_attr(mp); 1300 mp->m_flags |= XFS_MOUNT_RDONLY; 1301 } 1302 1303 return 0; 1304 } 1305 1306 /* 1307 * Second stage of a freeze. The data is already frozen so we only 1308 * need to take care of the metadata. Once that's done write a dummy 1309 * record to dirty the log in case of a crash while frozen. 1310 */ 1311 STATIC int 1312 xfs_fs_freeze( 1313 struct super_block *sb) 1314 { 1315 struct xfs_mount *mp = XFS_M(sb); 1316 1317 xfs_save_resvblks(mp); 1318 xfs_quiesce_attr(mp); 1319 return -xfs_fs_log_dummy(mp); 1320 } 1321 1322 STATIC int 1323 xfs_fs_unfreeze( 1324 struct super_block *sb) 1325 { 1326 struct xfs_mount *mp = XFS_M(sb); 1327 1328 xfs_restore_resvblks(mp); 1329 xfs_log_work_queue(mp); 1330 return 0; 1331 } 1332 1333 STATIC int 1334 xfs_fs_show_options( 1335 struct seq_file *m, 1336 struct dentry *root) 1337 { 1338 return -xfs_showargs(XFS_M(root->d_sb), m); 1339 } 1340 1341 /* 1342 * This function fills in xfs_mount_t fields based on mount args. 1343 * Note: the superblock _has_ now been read in. 1344 */ 1345 STATIC int 1346 xfs_finish_flags( 1347 struct xfs_mount *mp) 1348 { 1349 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1350 1351 /* Fail a mount where the logbuf is smaller than the log stripe */ 1352 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1353 if (mp->m_logbsize <= 0 && 1354 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1355 mp->m_logbsize = mp->m_sb.sb_logsunit; 1356 } else if (mp->m_logbsize > 0 && 1357 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1358 xfs_warn(mp, 1359 "logbuf size must be greater than or equal to log stripe size"); 1360 return XFS_ERROR(EINVAL); 1361 } 1362 } else { 1363 /* Fail a mount if the logbuf is larger than 32K */ 1364 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1365 xfs_warn(mp, 1366 "logbuf size for version 1 logs must be 16K or 32K"); 1367 return XFS_ERROR(EINVAL); 1368 } 1369 } 1370 1371 /* 1372 * V5 filesystems always use attr2 format for attributes. 1373 */ 1374 if (xfs_sb_version_hascrc(&mp->m_sb) && 1375 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 1376 xfs_warn(mp, 1377 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.", 1378 MNTOPT_NOATTR2, MNTOPT_ATTR2); 1379 return XFS_ERROR(EINVAL); 1380 } 1381 1382 /* 1383 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1384 * told by noattr2 to turn it off 1385 */ 1386 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1387 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1388 mp->m_flags |= XFS_MOUNT_ATTR2; 1389 1390 /* 1391 * prohibit r/w mounts of read-only filesystems 1392 */ 1393 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1394 xfs_warn(mp, 1395 "cannot mount a read-only filesystem as read-write"); 1396 return XFS_ERROR(EROFS); 1397 } 1398 1399 return 0; 1400 } 1401 1402 STATIC int 1403 xfs_fs_fill_super( 1404 struct super_block *sb, 1405 void *data, 1406 int silent) 1407 { 1408 struct inode *root; 1409 struct xfs_mount *mp = NULL; 1410 int flags = 0, error = ENOMEM; 1411 1412 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1413 if (!mp) 1414 goto out; 1415 1416 spin_lock_init(&mp->m_sb_lock); 1417 mutex_init(&mp->m_growlock); 1418 atomic_set(&mp->m_active_trans, 0); 1419 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1420 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); 1421 1422 mp->m_super = sb; 1423 sb->s_fs_info = mp; 1424 1425 error = xfs_parseargs(mp, (char *)data); 1426 if (error) 1427 goto out_free_fsname; 1428 1429 sb_min_blocksize(sb, BBSIZE); 1430 sb->s_xattr = xfs_xattr_handlers; 1431 sb->s_export_op = &xfs_export_operations; 1432 #ifdef CONFIG_XFS_QUOTA 1433 sb->s_qcop = &xfs_quotactl_operations; 1434 #endif 1435 sb->s_op = &xfs_super_operations; 1436 1437 if (silent) 1438 flags |= XFS_MFSI_QUIET; 1439 1440 error = xfs_open_devices(mp); 1441 if (error) 1442 goto out_free_fsname; 1443 1444 error = xfs_init_mount_workqueues(mp); 1445 if (error) 1446 goto out_close_devices; 1447 1448 error = xfs_icsb_init_counters(mp); 1449 if (error) 1450 goto out_destroy_workqueues; 1451 1452 error = xfs_readsb(mp, flags); 1453 if (error) 1454 goto out_destroy_counters; 1455 1456 error = xfs_finish_flags(mp); 1457 if (error) 1458 goto out_free_sb; 1459 1460 error = xfs_setup_devices(mp); 1461 if (error) 1462 goto out_free_sb; 1463 1464 error = xfs_filestream_mount(mp); 1465 if (error) 1466 goto out_free_sb; 1467 1468 /* 1469 * we must configure the block size in the superblock before we run the 1470 * full mount process as the mount process can lookup and cache inodes. 1471 */ 1472 sb->s_magic = XFS_SB_MAGIC; 1473 sb->s_blocksize = mp->m_sb.sb_blocksize; 1474 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1475 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1476 sb->s_max_links = XFS_MAXLINK; 1477 sb->s_time_gran = 1; 1478 set_posix_acl_flag(sb); 1479 1480 /* version 5 superblocks support inode version counters. */ 1481 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1482 sb->s_flags |= MS_I_VERSION; 1483 1484 error = xfs_mountfs(mp); 1485 if (error) 1486 goto out_filestream_unmount; 1487 1488 root = igrab(VFS_I(mp->m_rootip)); 1489 if (!root) { 1490 error = ENOENT; 1491 goto out_unmount; 1492 } 1493 if (is_bad_inode(root)) { 1494 error = EINVAL; 1495 goto out_unmount; 1496 } 1497 sb->s_root = d_make_root(root); 1498 if (!sb->s_root) { 1499 error = ENOMEM; 1500 goto out_unmount; 1501 } 1502 1503 return 0; 1504 1505 out_filestream_unmount: 1506 xfs_filestream_unmount(mp); 1507 out_free_sb: 1508 xfs_freesb(mp); 1509 out_destroy_counters: 1510 xfs_icsb_destroy_counters(mp); 1511 out_destroy_workqueues: 1512 xfs_destroy_mount_workqueues(mp); 1513 out_close_devices: 1514 xfs_close_devices(mp); 1515 out_free_fsname: 1516 xfs_free_fsname(mp); 1517 kfree(mp); 1518 out: 1519 return -error; 1520 1521 out_unmount: 1522 xfs_filestream_unmount(mp); 1523 xfs_unmountfs(mp); 1524 goto out_free_sb; 1525 } 1526 1527 STATIC struct dentry * 1528 xfs_fs_mount( 1529 struct file_system_type *fs_type, 1530 int flags, 1531 const char *dev_name, 1532 void *data) 1533 { 1534 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1535 } 1536 1537 static int 1538 xfs_fs_nr_cached_objects( 1539 struct super_block *sb) 1540 { 1541 return xfs_reclaim_inodes_count(XFS_M(sb)); 1542 } 1543 1544 static void 1545 xfs_fs_free_cached_objects( 1546 struct super_block *sb, 1547 int nr_to_scan) 1548 { 1549 xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan); 1550 } 1551 1552 static const struct super_operations xfs_super_operations = { 1553 .alloc_inode = xfs_fs_alloc_inode, 1554 .destroy_inode = xfs_fs_destroy_inode, 1555 .evict_inode = xfs_fs_evict_inode, 1556 .drop_inode = xfs_fs_drop_inode, 1557 .put_super = xfs_fs_put_super, 1558 .sync_fs = xfs_fs_sync_fs, 1559 .freeze_fs = xfs_fs_freeze, 1560 .unfreeze_fs = xfs_fs_unfreeze, 1561 .statfs = xfs_fs_statfs, 1562 .remount_fs = xfs_fs_remount, 1563 .show_options = xfs_fs_show_options, 1564 .nr_cached_objects = xfs_fs_nr_cached_objects, 1565 .free_cached_objects = xfs_fs_free_cached_objects, 1566 }; 1567 1568 static struct file_system_type xfs_fs_type = { 1569 .owner = THIS_MODULE, 1570 .name = "xfs", 1571 .mount = xfs_fs_mount, 1572 .kill_sb = kill_block_super, 1573 .fs_flags = FS_REQUIRES_DEV, 1574 }; 1575 MODULE_ALIAS_FS("xfs"); 1576 1577 STATIC int __init 1578 xfs_init_zones(void) 1579 { 1580 1581 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1582 if (!xfs_ioend_zone) 1583 goto out; 1584 1585 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1586 xfs_ioend_zone); 1587 if (!xfs_ioend_pool) 1588 goto out_destroy_ioend_zone; 1589 1590 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1591 "xfs_log_ticket"); 1592 if (!xfs_log_ticket_zone) 1593 goto out_destroy_ioend_pool; 1594 1595 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1596 "xfs_bmap_free_item"); 1597 if (!xfs_bmap_free_item_zone) 1598 goto out_destroy_log_ticket_zone; 1599 1600 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1601 "xfs_btree_cur"); 1602 if (!xfs_btree_cur_zone) 1603 goto out_destroy_bmap_free_item_zone; 1604 1605 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1606 "xfs_da_state"); 1607 if (!xfs_da_state_zone) 1608 goto out_destroy_btree_cur_zone; 1609 1610 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1611 if (!xfs_ifork_zone) 1612 goto out_destroy_da_state_zone; 1613 1614 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1615 if (!xfs_trans_zone) 1616 goto out_destroy_ifork_zone; 1617 1618 xfs_log_item_desc_zone = 1619 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1620 "xfs_log_item_desc"); 1621 if (!xfs_log_item_desc_zone) 1622 goto out_destroy_trans_zone; 1623 1624 /* 1625 * The size of the zone allocated buf log item is the maximum 1626 * size possible under XFS. This wastes a little bit of memory, 1627 * but it is much faster. 1628 */ 1629 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1630 "xfs_buf_item"); 1631 if (!xfs_buf_item_zone) 1632 goto out_destroy_log_item_desc_zone; 1633 1634 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1635 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1636 sizeof(xfs_extent_t))), "xfs_efd_item"); 1637 if (!xfs_efd_zone) 1638 goto out_destroy_buf_item_zone; 1639 1640 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1641 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1642 sizeof(xfs_extent_t))), "xfs_efi_item"); 1643 if (!xfs_efi_zone) 1644 goto out_destroy_efd_zone; 1645 1646 xfs_inode_zone = 1647 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1648 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1649 xfs_fs_inode_init_once); 1650 if (!xfs_inode_zone) 1651 goto out_destroy_efi_zone; 1652 1653 xfs_ili_zone = 1654 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1655 KM_ZONE_SPREAD, NULL); 1656 if (!xfs_ili_zone) 1657 goto out_destroy_inode_zone; 1658 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), 1659 "xfs_icr"); 1660 if (!xfs_icreate_zone) 1661 goto out_destroy_ili_zone; 1662 1663 return 0; 1664 1665 out_destroy_ili_zone: 1666 kmem_zone_destroy(xfs_ili_zone); 1667 out_destroy_inode_zone: 1668 kmem_zone_destroy(xfs_inode_zone); 1669 out_destroy_efi_zone: 1670 kmem_zone_destroy(xfs_efi_zone); 1671 out_destroy_efd_zone: 1672 kmem_zone_destroy(xfs_efd_zone); 1673 out_destroy_buf_item_zone: 1674 kmem_zone_destroy(xfs_buf_item_zone); 1675 out_destroy_log_item_desc_zone: 1676 kmem_zone_destroy(xfs_log_item_desc_zone); 1677 out_destroy_trans_zone: 1678 kmem_zone_destroy(xfs_trans_zone); 1679 out_destroy_ifork_zone: 1680 kmem_zone_destroy(xfs_ifork_zone); 1681 out_destroy_da_state_zone: 1682 kmem_zone_destroy(xfs_da_state_zone); 1683 out_destroy_btree_cur_zone: 1684 kmem_zone_destroy(xfs_btree_cur_zone); 1685 out_destroy_bmap_free_item_zone: 1686 kmem_zone_destroy(xfs_bmap_free_item_zone); 1687 out_destroy_log_ticket_zone: 1688 kmem_zone_destroy(xfs_log_ticket_zone); 1689 out_destroy_ioend_pool: 1690 mempool_destroy(xfs_ioend_pool); 1691 out_destroy_ioend_zone: 1692 kmem_zone_destroy(xfs_ioend_zone); 1693 out: 1694 return -ENOMEM; 1695 } 1696 1697 STATIC void 1698 xfs_destroy_zones(void) 1699 { 1700 /* 1701 * Make sure all delayed rcu free are flushed before we 1702 * destroy caches. 1703 */ 1704 rcu_barrier(); 1705 kmem_zone_destroy(xfs_icreate_zone); 1706 kmem_zone_destroy(xfs_ili_zone); 1707 kmem_zone_destroy(xfs_inode_zone); 1708 kmem_zone_destroy(xfs_efi_zone); 1709 kmem_zone_destroy(xfs_efd_zone); 1710 kmem_zone_destroy(xfs_buf_item_zone); 1711 kmem_zone_destroy(xfs_log_item_desc_zone); 1712 kmem_zone_destroy(xfs_trans_zone); 1713 kmem_zone_destroy(xfs_ifork_zone); 1714 kmem_zone_destroy(xfs_da_state_zone); 1715 kmem_zone_destroy(xfs_btree_cur_zone); 1716 kmem_zone_destroy(xfs_bmap_free_item_zone); 1717 kmem_zone_destroy(xfs_log_ticket_zone); 1718 mempool_destroy(xfs_ioend_pool); 1719 kmem_zone_destroy(xfs_ioend_zone); 1720 1721 } 1722 1723 STATIC int __init 1724 xfs_init_workqueues(void) 1725 { 1726 /* 1727 * The allocation workqueue can be used in memory reclaim situations 1728 * (writepage path), and parallelism is only limited by the number of 1729 * AGs in all the filesystems mounted. Hence use the default large 1730 * max_active value for this workqueue. 1731 */ 1732 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0); 1733 if (!xfs_alloc_wq) 1734 return -ENOMEM; 1735 1736 return 0; 1737 } 1738 1739 STATIC void 1740 xfs_destroy_workqueues(void) 1741 { 1742 destroy_workqueue(xfs_alloc_wq); 1743 } 1744 1745 STATIC int __init 1746 init_xfs_fs(void) 1747 { 1748 int error; 1749 1750 printk(KERN_INFO XFS_VERSION_STRING " with " 1751 XFS_BUILD_OPTIONS " enabled\n"); 1752 1753 xfs_dir_startup(); 1754 1755 error = xfs_init_zones(); 1756 if (error) 1757 goto out; 1758 1759 error = xfs_init_workqueues(); 1760 if (error) 1761 goto out_destroy_zones; 1762 1763 error = xfs_mru_cache_init(); 1764 if (error) 1765 goto out_destroy_wq; 1766 1767 error = xfs_filestream_init(); 1768 if (error) 1769 goto out_mru_cache_uninit; 1770 1771 error = xfs_buf_init(); 1772 if (error) 1773 goto out_filestream_uninit; 1774 1775 error = xfs_init_procfs(); 1776 if (error) 1777 goto out_buf_terminate; 1778 1779 error = xfs_sysctl_register(); 1780 if (error) 1781 goto out_cleanup_procfs; 1782 1783 error = xfs_qm_init(); 1784 if (error) 1785 goto out_sysctl_unregister; 1786 1787 error = register_filesystem(&xfs_fs_type); 1788 if (error) 1789 goto out_qm_exit; 1790 return 0; 1791 1792 out_qm_exit: 1793 xfs_qm_exit(); 1794 out_sysctl_unregister: 1795 xfs_sysctl_unregister(); 1796 out_cleanup_procfs: 1797 xfs_cleanup_procfs(); 1798 out_buf_terminate: 1799 xfs_buf_terminate(); 1800 out_filestream_uninit: 1801 xfs_filestream_uninit(); 1802 out_mru_cache_uninit: 1803 xfs_mru_cache_uninit(); 1804 out_destroy_wq: 1805 xfs_destroy_workqueues(); 1806 out_destroy_zones: 1807 xfs_destroy_zones(); 1808 out: 1809 return error; 1810 } 1811 1812 STATIC void __exit 1813 exit_xfs_fs(void) 1814 { 1815 xfs_qm_exit(); 1816 unregister_filesystem(&xfs_fs_type); 1817 xfs_sysctl_unregister(); 1818 xfs_cleanup_procfs(); 1819 xfs_buf_terminate(); 1820 xfs_filestream_uninit(); 1821 xfs_mru_cache_uninit(); 1822 xfs_destroy_workqueues(); 1823 xfs_destroy_zones(); 1824 } 1825 1826 module_init(init_xfs_fs); 1827 module_exit(exit_xfs_fs); 1828 1829 MODULE_AUTHOR("Silicon Graphics, Inc."); 1830 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1831 MODULE_LICENSE("GPL"); 1832