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_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_sb.h" 25 #include "xfs_mount.h" 26 #include "xfs_da_format.h" 27 #include "xfs_inode.h" 28 #include "xfs_btree.h" 29 #include "xfs_bmap.h" 30 #include "xfs_alloc.h" 31 #include "xfs_error.h" 32 #include "xfs_fsops.h" 33 #include "xfs_trans.h" 34 #include "xfs_buf_item.h" 35 #include "xfs_log.h" 36 #include "xfs_log_priv.h" 37 #include "xfs_da_btree.h" 38 #include "xfs_dir2.h" 39 #include "xfs_extfree_item.h" 40 #include "xfs_mru_cache.h" 41 #include "xfs_inode_item.h" 42 #include "xfs_icache.h" 43 #include "xfs_trace.h" 44 #include "xfs_icreate_item.h" 45 #include "xfs_filestream.h" 46 #include "xfs_quota.h" 47 #include "xfs_sysfs.h" 48 49 #include <linux/namei.h> 50 #include <linux/init.h> 51 #include <linux/slab.h> 52 #include <linux/mount.h> 53 #include <linux/mempool.h> 54 #include <linux/writeback.h> 55 #include <linux/kthread.h> 56 #include <linux/freezer.h> 57 #include <linux/parser.h> 58 59 static const struct super_operations xfs_super_operations; 60 static kmem_zone_t *xfs_ioend_zone; 61 mempool_t *xfs_ioend_pool; 62 63 static struct kset *xfs_kset; /* top-level xfs sysfs dir */ 64 #ifdef DEBUG 65 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ 66 #endif 67 68 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ 69 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ 70 #define MNTOPT_LOGDEV "logdev" /* log device */ 71 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ 72 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ 73 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ 74 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ 75 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ 76 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ 77 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ 78 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ 79 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ 80 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ 81 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ 82 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ 83 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ 84 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ 85 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ 86 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and 87 * unwritten extent conversion */ 88 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ 89 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ 90 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to 91 * XFS_MAXINUMBER_32 */ 92 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ 93 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ 94 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ 95 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes 96 * in stat(). */ 97 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ 98 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ 99 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ 100 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ 101 #define MNTOPT_NOQUOTA "noquota" /* no quotas */ 102 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ 103 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ 104 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ 105 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ 106 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ 107 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ 108 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ 109 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ 110 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ 111 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ 112 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */ 113 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */ 114 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ 115 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ 116 117 /* 118 * Table driven mount option parser. 119 * 120 * Currently only used for remount, but it will be used for mount 121 * in the future, too. 122 */ 123 enum { 124 Opt_barrier, 125 Opt_nobarrier, 126 Opt_inode64, 127 Opt_inode32, 128 Opt_err 129 }; 130 131 static const match_table_t tokens = { 132 {Opt_barrier, "barrier"}, 133 {Opt_nobarrier, "nobarrier"}, 134 {Opt_inode64, "inode64"}, 135 {Opt_inode32, "inode32"}, 136 {Opt_err, NULL} 137 }; 138 139 140 STATIC unsigned long 141 suffix_kstrtoint(char *s, unsigned int base, int *res) 142 { 143 int last, shift_left_factor = 0, _res; 144 char *value = s; 145 146 last = strlen(value) - 1; 147 if (value[last] == 'K' || value[last] == 'k') { 148 shift_left_factor = 10; 149 value[last] = '\0'; 150 } 151 if (value[last] == 'M' || value[last] == 'm') { 152 shift_left_factor = 20; 153 value[last] = '\0'; 154 } 155 if (value[last] == 'G' || value[last] == 'g') { 156 shift_left_factor = 30; 157 value[last] = '\0'; 158 } 159 160 if (kstrtoint(s, base, &_res)) 161 return -EINVAL; 162 *res = _res << shift_left_factor; 163 return 0; 164 } 165 166 /* 167 * This function fills in xfs_mount_t fields based on mount args. 168 * Note: the superblock has _not_ yet been read in. 169 * 170 * Note that this function leaks the various device name allocations on 171 * failure. The caller takes care of them. 172 */ 173 STATIC int 174 xfs_parseargs( 175 struct xfs_mount *mp, 176 char *options) 177 { 178 struct super_block *sb = mp->m_super; 179 char *this_char, *value; 180 int dsunit = 0; 181 int dswidth = 0; 182 int iosize = 0; 183 __uint8_t iosizelog = 0; 184 185 /* 186 * set up the mount name first so all the errors will refer to the 187 * correct device. 188 */ 189 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 190 if (!mp->m_fsname) 191 return -ENOMEM; 192 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 193 194 /* 195 * Copy binary VFS mount flags we are interested in. 196 */ 197 if (sb->s_flags & MS_RDONLY) 198 mp->m_flags |= XFS_MOUNT_RDONLY; 199 if (sb->s_flags & MS_DIRSYNC) 200 mp->m_flags |= XFS_MOUNT_DIRSYNC; 201 if (sb->s_flags & MS_SYNCHRONOUS) 202 mp->m_flags |= XFS_MOUNT_WSYNC; 203 204 /* 205 * Set some default flags that could be cleared by the mount option 206 * parsing. 207 */ 208 mp->m_flags |= XFS_MOUNT_BARRIER; 209 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 210 211 /* 212 * These can be overridden by the mount option parsing. 213 */ 214 mp->m_logbufs = -1; 215 mp->m_logbsize = -1; 216 217 if (!options) 218 goto done; 219 220 while ((this_char = strsep(&options, ",")) != NULL) { 221 if (!*this_char) 222 continue; 223 if ((value = strchr(this_char, '=')) != NULL) 224 *value++ = 0; 225 226 if (!strcmp(this_char, MNTOPT_LOGBUFS)) { 227 if (!value || !*value) { 228 xfs_warn(mp, "%s option requires an argument", 229 this_char); 230 return -EINVAL; 231 } 232 if (kstrtoint(value, 10, &mp->m_logbufs)) 233 return -EINVAL; 234 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { 235 if (!value || !*value) { 236 xfs_warn(mp, "%s option requires an argument", 237 this_char); 238 return -EINVAL; 239 } 240 if (suffix_kstrtoint(value, 10, &mp->m_logbsize)) 241 return -EINVAL; 242 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { 243 if (!value || !*value) { 244 xfs_warn(mp, "%s option requires an argument", 245 this_char); 246 return -EINVAL; 247 } 248 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 249 if (!mp->m_logname) 250 return -ENOMEM; 251 } else if (!strcmp(this_char, MNTOPT_MTPT)) { 252 xfs_warn(mp, "%s option not allowed on this system", 253 this_char); 254 return -EINVAL; 255 } else if (!strcmp(this_char, MNTOPT_RTDEV)) { 256 if (!value || !*value) { 257 xfs_warn(mp, "%s option requires an argument", 258 this_char); 259 return -EINVAL; 260 } 261 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 262 if (!mp->m_rtname) 263 return -ENOMEM; 264 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { 265 if (!value || !*value) { 266 xfs_warn(mp, "%s option requires an argument", 267 this_char); 268 return -EINVAL; 269 } 270 if (kstrtoint(value, 10, &iosize)) 271 return -EINVAL; 272 iosizelog = ffs(iosize) - 1; 273 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { 274 if (!value || !*value) { 275 xfs_warn(mp, "%s option requires an argument", 276 this_char); 277 return -EINVAL; 278 } 279 if (suffix_kstrtoint(value, 10, &iosize)) 280 return -EINVAL; 281 iosizelog = ffs(iosize) - 1; 282 } else if (!strcmp(this_char, MNTOPT_GRPID) || 283 !strcmp(this_char, MNTOPT_BSDGROUPS)) { 284 mp->m_flags |= XFS_MOUNT_GRPID; 285 } else if (!strcmp(this_char, MNTOPT_NOGRPID) || 286 !strcmp(this_char, MNTOPT_SYSVGROUPS)) { 287 mp->m_flags &= ~XFS_MOUNT_GRPID; 288 } else if (!strcmp(this_char, MNTOPT_WSYNC)) { 289 mp->m_flags |= XFS_MOUNT_WSYNC; 290 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { 291 mp->m_flags |= XFS_MOUNT_NORECOVERY; 292 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { 293 mp->m_flags |= XFS_MOUNT_NOALIGN; 294 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { 295 mp->m_flags |= XFS_MOUNT_SWALLOC; 296 } else if (!strcmp(this_char, MNTOPT_SUNIT)) { 297 if (!value || !*value) { 298 xfs_warn(mp, "%s option requires an argument", 299 this_char); 300 return -EINVAL; 301 } 302 if (kstrtoint(value, 10, &dsunit)) 303 return -EINVAL; 304 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { 305 if (!value || !*value) { 306 xfs_warn(mp, "%s option requires an argument", 307 this_char); 308 return -EINVAL; 309 } 310 if (kstrtoint(value, 10, &dswidth)) 311 return -EINVAL; 312 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) { 313 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 314 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { 315 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 316 } else if (!strcmp(this_char, MNTOPT_NOUUID)) { 317 mp->m_flags |= XFS_MOUNT_NOUUID; 318 } else if (!strcmp(this_char, MNTOPT_BARRIER)) { 319 mp->m_flags |= XFS_MOUNT_BARRIER; 320 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { 321 mp->m_flags &= ~XFS_MOUNT_BARRIER; 322 } else if (!strcmp(this_char, MNTOPT_IKEEP)) { 323 mp->m_flags |= XFS_MOUNT_IKEEP; 324 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { 325 mp->m_flags &= ~XFS_MOUNT_IKEEP; 326 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { 327 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 328 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { 329 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 330 } else if (!strcmp(this_char, MNTOPT_ATTR2)) { 331 mp->m_flags |= XFS_MOUNT_ATTR2; 332 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { 333 mp->m_flags &= ~XFS_MOUNT_ATTR2; 334 mp->m_flags |= XFS_MOUNT_NOATTR2; 335 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { 336 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 337 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { 338 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 339 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 340 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 341 } else if (!strcmp(this_char, MNTOPT_QUOTA) || 342 !strcmp(this_char, MNTOPT_UQUOTA) || 343 !strcmp(this_char, MNTOPT_USRQUOTA)) { 344 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 345 XFS_UQUOTA_ENFD); 346 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || 347 !strcmp(this_char, MNTOPT_UQUOTANOENF)) { 348 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 349 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 350 } else if (!strcmp(this_char, MNTOPT_PQUOTA) || 351 !strcmp(this_char, MNTOPT_PRJQUOTA)) { 352 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 353 XFS_PQUOTA_ENFD); 354 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { 355 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 356 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 357 } else if (!strcmp(this_char, MNTOPT_GQUOTA) || 358 !strcmp(this_char, MNTOPT_GRPQUOTA)) { 359 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 360 XFS_GQUOTA_ENFD); 361 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { 362 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 363 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 364 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { 365 xfs_warn(mp, 366 "delaylog is the default now, option is deprecated."); 367 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { 368 xfs_warn(mp, 369 "nodelaylog support has been removed, option is deprecated."); 370 } else if (!strcmp(this_char, MNTOPT_DISCARD)) { 371 mp->m_flags |= XFS_MOUNT_DISCARD; 372 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { 373 mp->m_flags &= ~XFS_MOUNT_DISCARD; 374 } else if (!strcmp(this_char, "ihashsize")) { 375 xfs_warn(mp, 376 "ihashsize no longer used, option is deprecated."); 377 } else if (!strcmp(this_char, "osyncisdsync")) { 378 xfs_warn(mp, 379 "osyncisdsync has no effect, option is deprecated."); 380 } else if (!strcmp(this_char, "osyncisosync")) { 381 xfs_warn(mp, 382 "osyncisosync has no effect, option is deprecated."); 383 } else if (!strcmp(this_char, "irixsgid")) { 384 xfs_warn(mp, 385 "irixsgid is now a sysctl(2) variable, option is deprecated."); 386 } else { 387 xfs_warn(mp, "unknown mount option [%s].", this_char); 388 return -EINVAL; 389 } 390 } 391 392 /* 393 * no recovery flag requires a read-only mount 394 */ 395 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 396 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 397 xfs_warn(mp, "no-recovery mounts must be read-only."); 398 return -EINVAL; 399 } 400 401 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 402 xfs_warn(mp, 403 "sunit and swidth options incompatible with the noalign option"); 404 return -EINVAL; 405 } 406 407 #ifndef CONFIG_XFS_QUOTA 408 if (XFS_IS_QUOTA_RUNNING(mp)) { 409 xfs_warn(mp, "quota support not available in this kernel."); 410 return -EINVAL; 411 } 412 #endif 413 414 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 415 xfs_warn(mp, "sunit and swidth must be specified together"); 416 return -EINVAL; 417 } 418 419 if (dsunit && (dswidth % dsunit != 0)) { 420 xfs_warn(mp, 421 "stripe width (%d) must be a multiple of the stripe unit (%d)", 422 dswidth, dsunit); 423 return -EINVAL; 424 } 425 426 done: 427 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { 428 /* 429 * At this point the superblock has not been read 430 * in, therefore we do not know the block size. 431 * Before the mount call ends we will convert 432 * these to FSBs. 433 */ 434 mp->m_dalign = dsunit; 435 mp->m_swidth = dswidth; 436 } 437 438 if (mp->m_logbufs != -1 && 439 mp->m_logbufs != 0 && 440 (mp->m_logbufs < XLOG_MIN_ICLOGS || 441 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 442 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 443 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 444 return -EINVAL; 445 } 446 if (mp->m_logbsize != -1 && 447 mp->m_logbsize != 0 && 448 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 449 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 450 !is_power_of_2(mp->m_logbsize))) { 451 xfs_warn(mp, 452 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 453 mp->m_logbsize); 454 return -EINVAL; 455 } 456 457 if (iosizelog) { 458 if (iosizelog > XFS_MAX_IO_LOG || 459 iosizelog < XFS_MIN_IO_LOG) { 460 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 461 iosizelog, XFS_MIN_IO_LOG, 462 XFS_MAX_IO_LOG); 463 return -EINVAL; 464 } 465 466 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 467 mp->m_readio_log = iosizelog; 468 mp->m_writeio_log = iosizelog; 469 } 470 471 return 0; 472 } 473 474 struct proc_xfs_info { 475 int flag; 476 char *str; 477 }; 478 479 STATIC int 480 xfs_showargs( 481 struct xfs_mount *mp, 482 struct seq_file *m) 483 { 484 static struct proc_xfs_info xfs_info_set[] = { 485 /* the few simple ones we can get from the mount struct */ 486 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP }, 487 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, 488 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, 489 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, 490 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, 491 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, 492 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, 493 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, 494 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, 495 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, 496 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE }, 497 { 0, NULL } 498 }; 499 static struct proc_xfs_info xfs_info_unset[] = { 500 /* the few simple ones we can get from the mount struct */ 501 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO }, 502 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, 503 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, 504 { 0, NULL } 505 }; 506 struct proc_xfs_info *xfs_infop; 507 508 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 509 if (mp->m_flags & xfs_infop->flag) 510 seq_puts(m, xfs_infop->str); 511 } 512 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 513 if (!(mp->m_flags & xfs_infop->flag)) 514 seq_puts(m, xfs_infop->str); 515 } 516 517 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 518 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", 519 (int)(1 << mp->m_writeio_log) >> 10); 520 521 if (mp->m_logbufs > 0) 522 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); 523 if (mp->m_logbsize > 0) 524 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); 525 526 if (mp->m_logname) 527 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); 528 if (mp->m_rtname) 529 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); 530 531 if (mp->m_dalign > 0) 532 seq_printf(m, "," MNTOPT_SUNIT "=%d", 533 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 534 if (mp->m_swidth > 0) 535 seq_printf(m, "," MNTOPT_SWIDTH "=%d", 536 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 537 538 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 539 seq_puts(m, "," MNTOPT_USRQUOTA); 540 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 541 seq_puts(m, "," MNTOPT_UQUOTANOENF); 542 543 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 544 if (mp->m_qflags & XFS_PQUOTA_ENFD) 545 seq_puts(m, "," MNTOPT_PRJQUOTA); 546 else 547 seq_puts(m, "," MNTOPT_PQUOTANOENF); 548 } 549 if (mp->m_qflags & XFS_GQUOTA_ACCT) { 550 if (mp->m_qflags & XFS_GQUOTA_ENFD) 551 seq_puts(m, "," MNTOPT_GRPQUOTA); 552 else 553 seq_puts(m, "," MNTOPT_GQUOTANOENF); 554 } 555 556 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 557 seq_puts(m, "," MNTOPT_NOQUOTA); 558 559 return 0; 560 } 561 __uint64_t 562 xfs_max_file_offset( 563 unsigned int blockshift) 564 { 565 unsigned int pagefactor = 1; 566 unsigned int bitshift = BITS_PER_LONG - 1; 567 568 /* Figure out maximum filesize, on Linux this can depend on 569 * the filesystem blocksize (on 32 bit platforms). 570 * __block_write_begin does this in an [unsigned] long... 571 * page->index << (PAGE_CACHE_SHIFT - bbits) 572 * So, for page sized blocks (4K on 32 bit platforms), 573 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 574 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 575 * but for smaller blocksizes it is less (bbits = log2 bsize). 576 * Note1: get_block_t takes a long (implicit cast from above) 577 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 578 * can optionally convert the [unsigned] long from above into 579 * an [unsigned] long long. 580 */ 581 582 #if BITS_PER_LONG == 32 583 # if defined(CONFIG_LBDAF) 584 ASSERT(sizeof(sector_t) == 8); 585 pagefactor = PAGE_CACHE_SIZE; 586 bitshift = BITS_PER_LONG; 587 # else 588 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 589 # endif 590 #endif 591 592 return (((__uint64_t)pagefactor) << bitshift) - 1; 593 } 594 595 /* 596 * xfs_set_inode32() and xfs_set_inode64() are passed an agcount 597 * because in the growfs case, mp->m_sb.sb_agcount is not updated 598 * yet to the potentially higher ag count. 599 */ 600 xfs_agnumber_t 601 xfs_set_inode32(struct xfs_mount *mp, xfs_agnumber_t agcount) 602 { 603 xfs_agnumber_t index = 0; 604 xfs_agnumber_t maxagi = 0; 605 xfs_sb_t *sbp = &mp->m_sb; 606 xfs_agnumber_t max_metadata; 607 xfs_agino_t agino; 608 xfs_ino_t ino; 609 xfs_perag_t *pag; 610 611 /* Calculate how much should be reserved for inodes to meet 612 * the max inode percentage. 613 */ 614 if (mp->m_maxicount) { 615 __uint64_t icount; 616 617 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 618 do_div(icount, 100); 619 icount += sbp->sb_agblocks - 1; 620 do_div(icount, sbp->sb_agblocks); 621 max_metadata = icount; 622 } else { 623 max_metadata = agcount; 624 } 625 626 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); 627 628 for (index = 0; index < agcount; index++) { 629 ino = XFS_AGINO_TO_INO(mp, index, agino); 630 631 if (ino > XFS_MAXINUMBER_32) { 632 pag = xfs_perag_get(mp, index); 633 pag->pagi_inodeok = 0; 634 pag->pagf_metadata = 0; 635 xfs_perag_put(pag); 636 continue; 637 } 638 639 pag = xfs_perag_get(mp, index); 640 pag->pagi_inodeok = 1; 641 maxagi++; 642 if (index < max_metadata) 643 pag->pagf_metadata = 1; 644 xfs_perag_put(pag); 645 } 646 mp->m_flags |= (XFS_MOUNT_32BITINODES | 647 XFS_MOUNT_SMALL_INUMS); 648 649 return maxagi; 650 } 651 652 xfs_agnumber_t 653 xfs_set_inode64(struct xfs_mount *mp, xfs_agnumber_t agcount) 654 { 655 xfs_agnumber_t index = 0; 656 657 for (index = 0; index < agcount; index++) { 658 struct xfs_perag *pag; 659 660 pag = xfs_perag_get(mp, index); 661 pag->pagi_inodeok = 1; 662 pag->pagf_metadata = 0; 663 xfs_perag_put(pag); 664 } 665 666 /* There is no need for lock protection on m_flags, 667 * the rw_semaphore of the VFS superblock is locked 668 * during mount/umount/remount operations, so this is 669 * enough to avoid concurency on the m_flags field 670 */ 671 mp->m_flags &= ~(XFS_MOUNT_32BITINODES | 672 XFS_MOUNT_SMALL_INUMS); 673 return index; 674 } 675 676 STATIC int 677 xfs_blkdev_get( 678 xfs_mount_t *mp, 679 const char *name, 680 struct block_device **bdevp) 681 { 682 int error = 0; 683 684 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 685 mp); 686 if (IS_ERR(*bdevp)) { 687 error = PTR_ERR(*bdevp); 688 xfs_warn(mp, "Invalid device [%s], error=%d", name, error); 689 } 690 691 return error; 692 } 693 694 STATIC void 695 xfs_blkdev_put( 696 struct block_device *bdev) 697 { 698 if (bdev) 699 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 700 } 701 702 void 703 xfs_blkdev_issue_flush( 704 xfs_buftarg_t *buftarg) 705 { 706 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 707 } 708 709 STATIC void 710 xfs_close_devices( 711 struct xfs_mount *mp) 712 { 713 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 714 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 715 xfs_free_buftarg(mp, mp->m_logdev_targp); 716 xfs_blkdev_put(logdev); 717 } 718 if (mp->m_rtdev_targp) { 719 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 720 xfs_free_buftarg(mp, mp->m_rtdev_targp); 721 xfs_blkdev_put(rtdev); 722 } 723 xfs_free_buftarg(mp, mp->m_ddev_targp); 724 } 725 726 /* 727 * The file system configurations are: 728 * (1) device (partition) with data and internal log 729 * (2) logical volume with data and log subvolumes. 730 * (3) logical volume with data, log, and realtime subvolumes. 731 * 732 * We only have to handle opening the log and realtime volumes here if 733 * they are present. The data subvolume has already been opened by 734 * get_sb_bdev() and is stored in sb->s_bdev. 735 */ 736 STATIC int 737 xfs_open_devices( 738 struct xfs_mount *mp) 739 { 740 struct block_device *ddev = mp->m_super->s_bdev; 741 struct block_device *logdev = NULL, *rtdev = NULL; 742 int error; 743 744 /* 745 * Open real time and log devices - order is important. 746 */ 747 if (mp->m_logname) { 748 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 749 if (error) 750 goto out; 751 } 752 753 if (mp->m_rtname) { 754 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 755 if (error) 756 goto out_close_logdev; 757 758 if (rtdev == ddev || rtdev == logdev) { 759 xfs_warn(mp, 760 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 761 error = -EINVAL; 762 goto out_close_rtdev; 763 } 764 } 765 766 /* 767 * Setup xfs_mount buffer target pointers 768 */ 769 error = -ENOMEM; 770 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev); 771 if (!mp->m_ddev_targp) 772 goto out_close_rtdev; 773 774 if (rtdev) { 775 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev); 776 if (!mp->m_rtdev_targp) 777 goto out_free_ddev_targ; 778 } 779 780 if (logdev && logdev != ddev) { 781 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev); 782 if (!mp->m_logdev_targp) 783 goto out_free_rtdev_targ; 784 } else { 785 mp->m_logdev_targp = mp->m_ddev_targp; 786 } 787 788 return 0; 789 790 out_free_rtdev_targ: 791 if (mp->m_rtdev_targp) 792 xfs_free_buftarg(mp, mp->m_rtdev_targp); 793 out_free_ddev_targ: 794 xfs_free_buftarg(mp, mp->m_ddev_targp); 795 out_close_rtdev: 796 xfs_blkdev_put(rtdev); 797 out_close_logdev: 798 if (logdev && logdev != ddev) 799 xfs_blkdev_put(logdev); 800 out: 801 return error; 802 } 803 804 /* 805 * Setup xfs_mount buffer target pointers based on superblock 806 */ 807 STATIC int 808 xfs_setup_devices( 809 struct xfs_mount *mp) 810 { 811 int error; 812 813 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); 814 if (error) 815 return error; 816 817 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 818 unsigned int log_sector_size = BBSIZE; 819 820 if (xfs_sb_version_hassector(&mp->m_sb)) 821 log_sector_size = mp->m_sb.sb_logsectsize; 822 error = xfs_setsize_buftarg(mp->m_logdev_targp, 823 log_sector_size); 824 if (error) 825 return error; 826 } 827 if (mp->m_rtdev_targp) { 828 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 829 mp->m_sb.sb_sectsize); 830 if (error) 831 return error; 832 } 833 834 return 0; 835 } 836 837 STATIC int 838 xfs_init_mount_workqueues( 839 struct xfs_mount *mp) 840 { 841 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s", 842 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname); 843 if (!mp->m_buf_workqueue) 844 goto out; 845 846 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 847 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 848 if (!mp->m_data_workqueue) 849 goto out_destroy_buf; 850 851 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 852 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 853 if (!mp->m_unwritten_workqueue) 854 goto out_destroy_data_iodone_queue; 855 856 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 857 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 858 if (!mp->m_cil_workqueue) 859 goto out_destroy_unwritten; 860 861 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 862 WQ_FREEZABLE, 0, mp->m_fsname); 863 if (!mp->m_reclaim_workqueue) 864 goto out_destroy_cil; 865 866 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", 867 WQ_FREEZABLE|WQ_HIGHPRI, 0, mp->m_fsname); 868 if (!mp->m_log_workqueue) 869 goto out_destroy_reclaim; 870 871 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", 872 WQ_FREEZABLE, 0, mp->m_fsname); 873 if (!mp->m_eofblocks_workqueue) 874 goto out_destroy_log; 875 876 return 0; 877 878 out_destroy_log: 879 destroy_workqueue(mp->m_log_workqueue); 880 out_destroy_reclaim: 881 destroy_workqueue(mp->m_reclaim_workqueue); 882 out_destroy_cil: 883 destroy_workqueue(mp->m_cil_workqueue); 884 out_destroy_unwritten: 885 destroy_workqueue(mp->m_unwritten_workqueue); 886 out_destroy_data_iodone_queue: 887 destroy_workqueue(mp->m_data_workqueue); 888 out_destroy_buf: 889 destroy_workqueue(mp->m_buf_workqueue); 890 out: 891 return -ENOMEM; 892 } 893 894 STATIC void 895 xfs_destroy_mount_workqueues( 896 struct xfs_mount *mp) 897 { 898 destroy_workqueue(mp->m_eofblocks_workqueue); 899 destroy_workqueue(mp->m_log_workqueue); 900 destroy_workqueue(mp->m_reclaim_workqueue); 901 destroy_workqueue(mp->m_cil_workqueue); 902 destroy_workqueue(mp->m_data_workqueue); 903 destroy_workqueue(mp->m_unwritten_workqueue); 904 destroy_workqueue(mp->m_buf_workqueue); 905 } 906 907 /* 908 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 909 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 910 * for IO to complete so that we effectively throttle multiple callers to the 911 * rate at which IO is completing. 912 */ 913 void 914 xfs_flush_inodes( 915 struct xfs_mount *mp) 916 { 917 struct super_block *sb = mp->m_super; 918 919 if (down_read_trylock(&sb->s_umount)) { 920 sync_inodes_sb(sb); 921 up_read(&sb->s_umount); 922 } 923 } 924 925 /* Catch misguided souls that try to use this interface on XFS */ 926 STATIC struct inode * 927 xfs_fs_alloc_inode( 928 struct super_block *sb) 929 { 930 BUG(); 931 return NULL; 932 } 933 934 /* 935 * Now that the generic code is guaranteed not to be accessing 936 * the linux inode, we can reclaim the inode. 937 */ 938 STATIC void 939 xfs_fs_destroy_inode( 940 struct inode *inode) 941 { 942 struct xfs_inode *ip = XFS_I(inode); 943 944 trace_xfs_destroy_inode(ip); 945 946 XFS_STATS_INC(vn_reclaim); 947 948 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 949 950 /* 951 * We should never get here with one of the reclaim flags already set. 952 */ 953 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 954 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 955 956 /* 957 * We always use background reclaim here because even if the 958 * inode is clean, it still may be under IO and hence we have 959 * to take the flush lock. The background reclaim path handles 960 * this more efficiently than we can here, so simply let background 961 * reclaim tear down all inodes. 962 */ 963 xfs_inode_set_reclaim_tag(ip); 964 } 965 966 /* 967 * Slab object creation initialisation for the XFS inode. 968 * This covers only the idempotent fields in the XFS inode; 969 * all other fields need to be initialised on allocation 970 * from the slab. This avoids the need to repeatedly initialise 971 * fields in the xfs inode that left in the initialise state 972 * when freeing the inode. 973 */ 974 STATIC void 975 xfs_fs_inode_init_once( 976 void *inode) 977 { 978 struct xfs_inode *ip = inode; 979 980 memset(ip, 0, sizeof(struct xfs_inode)); 981 982 /* vfs inode */ 983 inode_init_once(VFS_I(ip)); 984 985 /* xfs inode */ 986 atomic_set(&ip->i_pincount, 0); 987 spin_lock_init(&ip->i_flags_lock); 988 989 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 990 "xfsino", ip->i_ino); 991 } 992 993 STATIC void 994 xfs_fs_evict_inode( 995 struct inode *inode) 996 { 997 xfs_inode_t *ip = XFS_I(inode); 998 999 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 1000 1001 trace_xfs_evict_inode(ip); 1002 1003 truncate_inode_pages_final(&inode->i_data); 1004 clear_inode(inode); 1005 XFS_STATS_INC(vn_rele); 1006 XFS_STATS_INC(vn_remove); 1007 1008 xfs_inactive(ip); 1009 } 1010 1011 /* 1012 * We do an unlocked check for XFS_IDONTCACHE here because we are already 1013 * serialised against cache hits here via the inode->i_lock and igrab() in 1014 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 1015 * racing with us, and it avoids needing to grab a spinlock here for every inode 1016 * we drop the final reference on. 1017 */ 1018 STATIC int 1019 xfs_fs_drop_inode( 1020 struct inode *inode) 1021 { 1022 struct xfs_inode *ip = XFS_I(inode); 1023 1024 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 1025 } 1026 1027 STATIC void 1028 xfs_free_fsname( 1029 struct xfs_mount *mp) 1030 { 1031 kfree(mp->m_fsname); 1032 kfree(mp->m_rtname); 1033 kfree(mp->m_logname); 1034 } 1035 1036 STATIC void 1037 xfs_fs_put_super( 1038 struct super_block *sb) 1039 { 1040 struct xfs_mount *mp = XFS_M(sb); 1041 1042 xfs_filestream_unmount(mp); 1043 xfs_unmountfs(mp); 1044 1045 xfs_freesb(mp); 1046 xfs_icsb_destroy_counters(mp); 1047 xfs_destroy_mount_workqueues(mp); 1048 xfs_close_devices(mp); 1049 xfs_free_fsname(mp); 1050 kfree(mp); 1051 } 1052 1053 STATIC int 1054 xfs_fs_sync_fs( 1055 struct super_block *sb, 1056 int wait) 1057 { 1058 struct xfs_mount *mp = XFS_M(sb); 1059 1060 /* 1061 * Doing anything during the async pass would be counterproductive. 1062 */ 1063 if (!wait) 1064 return 0; 1065 1066 xfs_log_force(mp, XFS_LOG_SYNC); 1067 if (laptop_mode) { 1068 /* 1069 * The disk must be active because we're syncing. 1070 * We schedule log work now (now that the disk is 1071 * active) instead of later (when it might not be). 1072 */ 1073 flush_delayed_work(&mp->m_log->l_work); 1074 } 1075 1076 return 0; 1077 } 1078 1079 STATIC int 1080 xfs_fs_statfs( 1081 struct dentry *dentry, 1082 struct kstatfs *statp) 1083 { 1084 struct xfs_mount *mp = XFS_M(dentry->d_sb); 1085 xfs_sb_t *sbp = &mp->m_sb; 1086 struct xfs_inode *ip = XFS_I(dentry->d_inode); 1087 __uint64_t fakeinos, id; 1088 xfs_extlen_t lsize; 1089 __int64_t ffree; 1090 1091 statp->f_type = XFS_SB_MAGIC; 1092 statp->f_namelen = MAXNAMELEN - 1; 1093 1094 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 1095 statp->f_fsid.val[0] = (u32)id; 1096 statp->f_fsid.val[1] = (u32)(id >> 32); 1097 1098 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 1099 1100 spin_lock(&mp->m_sb_lock); 1101 statp->f_bsize = sbp->sb_blocksize; 1102 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 1103 statp->f_blocks = sbp->sb_dblocks - lsize; 1104 statp->f_bfree = statp->f_bavail = 1105 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 1106 fakeinos = statp->f_bfree << sbp->sb_inopblog; 1107 statp->f_files = 1108 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 1109 if (mp->m_maxicount) 1110 statp->f_files = min_t(typeof(statp->f_files), 1111 statp->f_files, 1112 mp->m_maxicount); 1113 1114 /* If sb_icount overshot maxicount, report actual allocation */ 1115 statp->f_files = max_t(typeof(statp->f_files), 1116 statp->f_files, 1117 sbp->sb_icount); 1118 1119 /* make sure statp->f_ffree does not underflow */ 1120 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); 1121 statp->f_ffree = max_t(__int64_t, ffree, 0); 1122 1123 spin_unlock(&mp->m_sb_lock); 1124 1125 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1126 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 1127 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 1128 xfs_qm_statvfs(ip, statp); 1129 return 0; 1130 } 1131 1132 STATIC void 1133 xfs_save_resvblks(struct xfs_mount *mp) 1134 { 1135 __uint64_t resblks = 0; 1136 1137 mp->m_resblks_save = mp->m_resblks; 1138 xfs_reserve_blocks(mp, &resblks, NULL); 1139 } 1140 1141 STATIC void 1142 xfs_restore_resvblks(struct xfs_mount *mp) 1143 { 1144 __uint64_t resblks; 1145 1146 if (mp->m_resblks_save) { 1147 resblks = mp->m_resblks_save; 1148 mp->m_resblks_save = 0; 1149 } else 1150 resblks = xfs_default_resblks(mp); 1151 1152 xfs_reserve_blocks(mp, &resblks, NULL); 1153 } 1154 1155 /* 1156 * Trigger writeback of all the dirty metadata in the file system. 1157 * 1158 * This ensures that the metadata is written to their location on disk rather 1159 * than just existing in transactions in the log. This means after a quiesce 1160 * there is no log replay required to write the inodes to disk - this is the 1161 * primary difference between a sync and a quiesce. 1162 * 1163 * Note: xfs_log_quiesce() stops background log work - the callers must ensure 1164 * it is started again when appropriate. 1165 */ 1166 static void 1167 xfs_quiesce_attr( 1168 struct xfs_mount *mp) 1169 { 1170 int error = 0; 1171 1172 /* wait for all modifications to complete */ 1173 while (atomic_read(&mp->m_active_trans) > 0) 1174 delay(100); 1175 1176 /* force the log to unpin objects from the now complete transactions */ 1177 xfs_log_force(mp, XFS_LOG_SYNC); 1178 1179 /* reclaim inodes to do any IO before the freeze completes */ 1180 xfs_reclaim_inodes(mp, 0); 1181 xfs_reclaim_inodes(mp, SYNC_WAIT); 1182 1183 /* Push the superblock and write an unmount record */ 1184 error = xfs_log_sbcount(mp); 1185 if (error) 1186 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " 1187 "Frozen image may not be consistent."); 1188 /* 1189 * Just warn here till VFS can correctly support 1190 * read-only remount without racing. 1191 */ 1192 WARN_ON(atomic_read(&mp->m_active_trans) != 0); 1193 1194 xfs_log_quiesce(mp); 1195 } 1196 1197 STATIC int 1198 xfs_fs_remount( 1199 struct super_block *sb, 1200 int *flags, 1201 char *options) 1202 { 1203 struct xfs_mount *mp = XFS_M(sb); 1204 xfs_sb_t *sbp = &mp->m_sb; 1205 substring_t args[MAX_OPT_ARGS]; 1206 char *p; 1207 int error; 1208 1209 sync_filesystem(sb); 1210 while ((p = strsep(&options, ",")) != NULL) { 1211 int token; 1212 1213 if (!*p) 1214 continue; 1215 1216 token = match_token(p, tokens, args); 1217 switch (token) { 1218 case Opt_barrier: 1219 mp->m_flags |= XFS_MOUNT_BARRIER; 1220 break; 1221 case Opt_nobarrier: 1222 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1223 break; 1224 case Opt_inode64: 1225 mp->m_maxagi = xfs_set_inode64(mp, sbp->sb_agcount); 1226 break; 1227 case Opt_inode32: 1228 mp->m_maxagi = xfs_set_inode32(mp, sbp->sb_agcount); 1229 break; 1230 default: 1231 /* 1232 * Logically we would return an error here to prevent 1233 * users from believing they might have changed 1234 * mount options using remount which can't be changed. 1235 * 1236 * But unfortunately mount(8) adds all options from 1237 * mtab and fstab to the mount arguments in some cases 1238 * so we can't blindly reject options, but have to 1239 * check for each specified option if it actually 1240 * differs from the currently set option and only 1241 * reject it if that's the case. 1242 * 1243 * Until that is implemented we return success for 1244 * every remount request, and silently ignore all 1245 * options that we can't actually change. 1246 */ 1247 #if 0 1248 xfs_info(mp, 1249 "mount option \"%s\" not supported for remount", p); 1250 return -EINVAL; 1251 #else 1252 break; 1253 #endif 1254 } 1255 } 1256 1257 /* ro -> rw */ 1258 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1259 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1260 1261 /* 1262 * If this is the first remount to writeable state we 1263 * might have some superblock changes to update. 1264 */ 1265 if (mp->m_update_sb) { 1266 error = xfs_sync_sb(mp, false); 1267 if (error) { 1268 xfs_warn(mp, "failed to write sb changes"); 1269 return error; 1270 } 1271 mp->m_update_sb = false; 1272 } 1273 1274 /* 1275 * Fill out the reserve pool if it is empty. Use the stashed 1276 * value if it is non-zero, otherwise go with the default. 1277 */ 1278 xfs_restore_resvblks(mp); 1279 xfs_log_work_queue(mp); 1280 } 1281 1282 /* rw -> ro */ 1283 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1284 /* 1285 * Before we sync the metadata, we need to free up the reserve 1286 * block pool so that the used block count in the superblock on 1287 * disk is correct at the end of the remount. Stash the current 1288 * reserve pool size so that if we get remounted rw, we can 1289 * return it to the same size. 1290 */ 1291 xfs_save_resvblks(mp); 1292 xfs_quiesce_attr(mp); 1293 mp->m_flags |= XFS_MOUNT_RDONLY; 1294 } 1295 1296 return 0; 1297 } 1298 1299 /* 1300 * Second stage of a freeze. The data is already frozen so we only 1301 * need to take care of the metadata. Once that's done sync the superblock 1302 * to the log to dirty it in case of a crash while frozen. This ensures that we 1303 * will recover the unlinked inode lists on the next mount. 1304 */ 1305 STATIC int 1306 xfs_fs_freeze( 1307 struct super_block *sb) 1308 { 1309 struct xfs_mount *mp = XFS_M(sb); 1310 1311 xfs_save_resvblks(mp); 1312 xfs_quiesce_attr(mp); 1313 return xfs_sync_sb(mp, true); 1314 } 1315 1316 STATIC int 1317 xfs_fs_unfreeze( 1318 struct super_block *sb) 1319 { 1320 struct xfs_mount *mp = XFS_M(sb); 1321 1322 xfs_restore_resvblks(mp); 1323 xfs_log_work_queue(mp); 1324 return 0; 1325 } 1326 1327 STATIC int 1328 xfs_fs_show_options( 1329 struct seq_file *m, 1330 struct dentry *root) 1331 { 1332 return xfs_showargs(XFS_M(root->d_sb), m); 1333 } 1334 1335 /* 1336 * This function fills in xfs_mount_t fields based on mount args. 1337 * Note: the superblock _has_ now been read in. 1338 */ 1339 STATIC int 1340 xfs_finish_flags( 1341 struct xfs_mount *mp) 1342 { 1343 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1344 1345 /* Fail a mount where the logbuf is smaller than the log stripe */ 1346 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1347 if (mp->m_logbsize <= 0 && 1348 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1349 mp->m_logbsize = mp->m_sb.sb_logsunit; 1350 } else if (mp->m_logbsize > 0 && 1351 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1352 xfs_warn(mp, 1353 "logbuf size must be greater than or equal to log stripe size"); 1354 return -EINVAL; 1355 } 1356 } else { 1357 /* Fail a mount if the logbuf is larger than 32K */ 1358 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1359 xfs_warn(mp, 1360 "logbuf size for version 1 logs must be 16K or 32K"); 1361 return -EINVAL; 1362 } 1363 } 1364 1365 /* 1366 * V5 filesystems always use attr2 format for attributes. 1367 */ 1368 if (xfs_sb_version_hascrc(&mp->m_sb) && 1369 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 1370 xfs_warn(mp, 1371 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.", 1372 MNTOPT_NOATTR2, MNTOPT_ATTR2); 1373 return -EINVAL; 1374 } 1375 1376 /* 1377 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1378 * told by noattr2 to turn it off 1379 */ 1380 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1381 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1382 mp->m_flags |= XFS_MOUNT_ATTR2; 1383 1384 /* 1385 * prohibit r/w mounts of read-only filesystems 1386 */ 1387 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1388 xfs_warn(mp, 1389 "cannot mount a read-only filesystem as read-write"); 1390 return -EROFS; 1391 } 1392 1393 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 1394 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && 1395 !xfs_sb_version_has_pquotino(&mp->m_sb)) { 1396 xfs_warn(mp, 1397 "Super block does not support project and group quota together"); 1398 return -EINVAL; 1399 } 1400 1401 return 0; 1402 } 1403 1404 STATIC int 1405 xfs_fs_fill_super( 1406 struct super_block *sb, 1407 void *data, 1408 int silent) 1409 { 1410 struct inode *root; 1411 struct xfs_mount *mp = NULL; 1412 int flags = 0, error = -ENOMEM; 1413 1414 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1415 if (!mp) 1416 goto out; 1417 1418 spin_lock_init(&mp->m_sb_lock); 1419 mutex_init(&mp->m_growlock); 1420 atomic_set(&mp->m_active_trans, 0); 1421 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1422 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); 1423 mp->m_kobj.kobject.kset = xfs_kset; 1424 1425 mp->m_super = sb; 1426 sb->s_fs_info = mp; 1427 1428 error = xfs_parseargs(mp, (char *)data); 1429 if (error) 1430 goto out_free_fsname; 1431 1432 sb_min_blocksize(sb, BBSIZE); 1433 sb->s_xattr = xfs_xattr_handlers; 1434 sb->s_export_op = &xfs_export_operations; 1435 #ifdef CONFIG_XFS_QUOTA 1436 sb->s_qcop = &xfs_quotactl_operations; 1437 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 1438 #endif 1439 sb->s_op = &xfs_super_operations; 1440 1441 if (silent) 1442 flags |= XFS_MFSI_QUIET; 1443 1444 error = xfs_open_devices(mp); 1445 if (error) 1446 goto out_free_fsname; 1447 1448 error = xfs_init_mount_workqueues(mp); 1449 if (error) 1450 goto out_close_devices; 1451 1452 error = xfs_icsb_init_counters(mp); 1453 if (error) 1454 goto out_destroy_workqueues; 1455 1456 error = xfs_readsb(mp, flags); 1457 if (error) 1458 goto out_destroy_counters; 1459 1460 error = xfs_finish_flags(mp); 1461 if (error) 1462 goto out_free_sb; 1463 1464 error = xfs_setup_devices(mp); 1465 if (error) 1466 goto out_free_sb; 1467 1468 error = xfs_filestream_mount(mp); 1469 if (error) 1470 goto out_free_sb; 1471 1472 /* 1473 * we must configure the block size in the superblock before we run the 1474 * full mount process as the mount process can lookup and cache inodes. 1475 */ 1476 sb->s_magic = XFS_SB_MAGIC; 1477 sb->s_blocksize = mp->m_sb.sb_blocksize; 1478 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1479 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1480 sb->s_max_links = XFS_MAXLINK; 1481 sb->s_time_gran = 1; 1482 set_posix_acl_flag(sb); 1483 1484 /* version 5 superblocks support inode version counters. */ 1485 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1486 sb->s_flags |= MS_I_VERSION; 1487 1488 error = xfs_mountfs(mp); 1489 if (error) 1490 goto out_filestream_unmount; 1491 1492 root = igrab(VFS_I(mp->m_rootip)); 1493 if (!root) { 1494 error = -ENOENT; 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 long 1538 xfs_fs_nr_cached_objects( 1539 struct super_block *sb, 1540 struct shrink_control *sc) 1541 { 1542 return xfs_reclaim_inodes_count(XFS_M(sb)); 1543 } 1544 1545 static long 1546 xfs_fs_free_cached_objects( 1547 struct super_block *sb, 1548 struct shrink_control *sc) 1549 { 1550 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); 1551 } 1552 1553 static const struct super_operations xfs_super_operations = { 1554 .alloc_inode = xfs_fs_alloc_inode, 1555 .destroy_inode = xfs_fs_destroy_inode, 1556 .evict_inode = xfs_fs_evict_inode, 1557 .drop_inode = xfs_fs_drop_inode, 1558 .put_super = xfs_fs_put_super, 1559 .sync_fs = xfs_fs_sync_fs, 1560 .freeze_fs = xfs_fs_freeze, 1561 .unfreeze_fs = xfs_fs_unfreeze, 1562 .statfs = xfs_fs_statfs, 1563 .remount_fs = xfs_fs_remount, 1564 .show_options = xfs_fs_show_options, 1565 .nr_cached_objects = xfs_fs_nr_cached_objects, 1566 .free_cached_objects = xfs_fs_free_cached_objects, 1567 }; 1568 1569 static struct file_system_type xfs_fs_type = { 1570 .owner = THIS_MODULE, 1571 .name = "xfs", 1572 .mount = xfs_fs_mount, 1573 .kill_sb = kill_block_super, 1574 .fs_flags = FS_REQUIRES_DEV, 1575 }; 1576 MODULE_ALIAS_FS("xfs"); 1577 1578 STATIC int __init 1579 xfs_init_zones(void) 1580 { 1581 1582 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1583 if (!xfs_ioend_zone) 1584 goto out; 1585 1586 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1587 xfs_ioend_zone); 1588 if (!xfs_ioend_pool) 1589 goto out_destroy_ioend_zone; 1590 1591 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1592 "xfs_log_ticket"); 1593 if (!xfs_log_ticket_zone) 1594 goto out_destroy_ioend_pool; 1595 1596 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1597 "xfs_bmap_free_item"); 1598 if (!xfs_bmap_free_item_zone) 1599 goto out_destroy_log_ticket_zone; 1600 1601 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1602 "xfs_btree_cur"); 1603 if (!xfs_btree_cur_zone) 1604 goto out_destroy_bmap_free_item_zone; 1605 1606 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1607 "xfs_da_state"); 1608 if (!xfs_da_state_zone) 1609 goto out_destroy_btree_cur_zone; 1610 1611 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1612 if (!xfs_ifork_zone) 1613 goto out_destroy_da_state_zone; 1614 1615 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1616 if (!xfs_trans_zone) 1617 goto out_destroy_ifork_zone; 1618 1619 xfs_log_item_desc_zone = 1620 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1621 "xfs_log_item_desc"); 1622 if (!xfs_log_item_desc_zone) 1623 goto out_destroy_trans_zone; 1624 1625 /* 1626 * The size of the zone allocated buf log item is the maximum 1627 * size possible under XFS. This wastes a little bit of memory, 1628 * but it is much faster. 1629 */ 1630 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1631 "xfs_buf_item"); 1632 if (!xfs_buf_item_zone) 1633 goto out_destroy_log_item_desc_zone; 1634 1635 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1636 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1637 sizeof(xfs_extent_t))), "xfs_efd_item"); 1638 if (!xfs_efd_zone) 1639 goto out_destroy_buf_item_zone; 1640 1641 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1642 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1643 sizeof(xfs_extent_t))), "xfs_efi_item"); 1644 if (!xfs_efi_zone) 1645 goto out_destroy_efd_zone; 1646 1647 xfs_inode_zone = 1648 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1649 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1650 xfs_fs_inode_init_once); 1651 if (!xfs_inode_zone) 1652 goto out_destroy_efi_zone; 1653 1654 xfs_ili_zone = 1655 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1656 KM_ZONE_SPREAD, NULL); 1657 if (!xfs_ili_zone) 1658 goto out_destroy_inode_zone; 1659 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), 1660 "xfs_icr"); 1661 if (!xfs_icreate_zone) 1662 goto out_destroy_ili_zone; 1663 1664 return 0; 1665 1666 out_destroy_ili_zone: 1667 kmem_zone_destroy(xfs_ili_zone); 1668 out_destroy_inode_zone: 1669 kmem_zone_destroy(xfs_inode_zone); 1670 out_destroy_efi_zone: 1671 kmem_zone_destroy(xfs_efi_zone); 1672 out_destroy_efd_zone: 1673 kmem_zone_destroy(xfs_efd_zone); 1674 out_destroy_buf_item_zone: 1675 kmem_zone_destroy(xfs_buf_item_zone); 1676 out_destroy_log_item_desc_zone: 1677 kmem_zone_destroy(xfs_log_item_desc_zone); 1678 out_destroy_trans_zone: 1679 kmem_zone_destroy(xfs_trans_zone); 1680 out_destroy_ifork_zone: 1681 kmem_zone_destroy(xfs_ifork_zone); 1682 out_destroy_da_state_zone: 1683 kmem_zone_destroy(xfs_da_state_zone); 1684 out_destroy_btree_cur_zone: 1685 kmem_zone_destroy(xfs_btree_cur_zone); 1686 out_destroy_bmap_free_item_zone: 1687 kmem_zone_destroy(xfs_bmap_free_item_zone); 1688 out_destroy_log_ticket_zone: 1689 kmem_zone_destroy(xfs_log_ticket_zone); 1690 out_destroy_ioend_pool: 1691 mempool_destroy(xfs_ioend_pool); 1692 out_destroy_ioend_zone: 1693 kmem_zone_destroy(xfs_ioend_zone); 1694 out: 1695 return -ENOMEM; 1696 } 1697 1698 STATIC void 1699 xfs_destroy_zones(void) 1700 { 1701 /* 1702 * Make sure all delayed rcu free are flushed before we 1703 * destroy caches. 1704 */ 1705 rcu_barrier(); 1706 kmem_zone_destroy(xfs_icreate_zone); 1707 kmem_zone_destroy(xfs_ili_zone); 1708 kmem_zone_destroy(xfs_inode_zone); 1709 kmem_zone_destroy(xfs_efi_zone); 1710 kmem_zone_destroy(xfs_efd_zone); 1711 kmem_zone_destroy(xfs_buf_item_zone); 1712 kmem_zone_destroy(xfs_log_item_desc_zone); 1713 kmem_zone_destroy(xfs_trans_zone); 1714 kmem_zone_destroy(xfs_ifork_zone); 1715 kmem_zone_destroy(xfs_da_state_zone); 1716 kmem_zone_destroy(xfs_btree_cur_zone); 1717 kmem_zone_destroy(xfs_bmap_free_item_zone); 1718 kmem_zone_destroy(xfs_log_ticket_zone); 1719 mempool_destroy(xfs_ioend_pool); 1720 kmem_zone_destroy(xfs_ioend_zone); 1721 1722 } 1723 1724 STATIC int __init 1725 xfs_init_workqueues(void) 1726 { 1727 /* 1728 * The allocation workqueue can be used in memory reclaim situations 1729 * (writepage path), and parallelism is only limited by the number of 1730 * AGs in all the filesystems mounted. Hence use the default large 1731 * max_active value for this workqueue. 1732 */ 1733 xfs_alloc_wq = alloc_workqueue("xfsalloc", 1734 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0); 1735 if (!xfs_alloc_wq) 1736 return -ENOMEM; 1737 1738 return 0; 1739 } 1740 1741 STATIC void 1742 xfs_destroy_workqueues(void) 1743 { 1744 destroy_workqueue(xfs_alloc_wq); 1745 } 1746 1747 STATIC int __init 1748 init_xfs_fs(void) 1749 { 1750 int error; 1751 1752 printk(KERN_INFO XFS_VERSION_STRING " with " 1753 XFS_BUILD_OPTIONS " enabled\n"); 1754 1755 xfs_dir_startup(); 1756 1757 error = xfs_init_zones(); 1758 if (error) 1759 goto out; 1760 1761 error = xfs_init_workqueues(); 1762 if (error) 1763 goto out_destroy_zones; 1764 1765 error = xfs_mru_cache_init(); 1766 if (error) 1767 goto out_destroy_wq; 1768 1769 error = xfs_buf_init(); 1770 if (error) 1771 goto out_mru_cache_uninit; 1772 1773 error = xfs_init_procfs(); 1774 if (error) 1775 goto out_buf_terminate; 1776 1777 error = xfs_sysctl_register(); 1778 if (error) 1779 goto out_cleanup_procfs; 1780 1781 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); 1782 if (!xfs_kset) { 1783 error = -ENOMEM; 1784 goto out_sysctl_unregister;; 1785 } 1786 1787 #ifdef DEBUG 1788 xfs_dbg_kobj.kobject.kset = xfs_kset; 1789 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug"); 1790 if (error) 1791 goto out_kset_unregister; 1792 #endif 1793 1794 error = xfs_qm_init(); 1795 if (error) 1796 goto out_remove_kobj; 1797 1798 error = register_filesystem(&xfs_fs_type); 1799 if (error) 1800 goto out_qm_exit; 1801 return 0; 1802 1803 out_qm_exit: 1804 xfs_qm_exit(); 1805 out_remove_kobj: 1806 #ifdef DEBUG 1807 xfs_sysfs_del(&xfs_dbg_kobj); 1808 out_kset_unregister: 1809 #endif 1810 kset_unregister(xfs_kset); 1811 out_sysctl_unregister: 1812 xfs_sysctl_unregister(); 1813 out_cleanup_procfs: 1814 xfs_cleanup_procfs(); 1815 out_buf_terminate: 1816 xfs_buf_terminate(); 1817 out_mru_cache_uninit: 1818 xfs_mru_cache_uninit(); 1819 out_destroy_wq: 1820 xfs_destroy_workqueues(); 1821 out_destroy_zones: 1822 xfs_destroy_zones(); 1823 out: 1824 return error; 1825 } 1826 1827 STATIC void __exit 1828 exit_xfs_fs(void) 1829 { 1830 xfs_qm_exit(); 1831 unregister_filesystem(&xfs_fs_type); 1832 #ifdef DEBUG 1833 xfs_sysfs_del(&xfs_dbg_kobj); 1834 #endif 1835 kset_unregister(xfs_kset); 1836 xfs_sysctl_unregister(); 1837 xfs_cleanup_procfs(); 1838 xfs_buf_terminate(); 1839 xfs_mru_cache_uninit(); 1840 xfs_destroy_workqueues(); 1841 xfs_destroy_zones(); 1842 } 1843 1844 module_init(init_xfs_fs); 1845 module_exit(exit_xfs_fs); 1846 1847 MODULE_AUTHOR("Silicon Graphics, Inc."); 1848 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1849 MODULE_LICENSE("GPL"); 1850