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_inum.h" 25 #include "xfs_sb.h" 26 #include "xfs_ag.h" 27 #include "xfs_mount.h" 28 #include "xfs_da_format.h" 29 #include "xfs_inode.h" 30 #include "xfs_btree.h" 31 #include "xfs_bmap.h" 32 #include "xfs_alloc.h" 33 #include "xfs_error.h" 34 #include "xfs_fsops.h" 35 #include "xfs_trans.h" 36 #include "xfs_buf_item.h" 37 #include "xfs_log.h" 38 #include "xfs_log_priv.h" 39 #include "xfs_da_btree.h" 40 #include "xfs_dir2.h" 41 #include "xfs_extfree_item.h" 42 #include "xfs_mru_cache.h" 43 #include "xfs_inode_item.h" 44 #include "xfs_icache.h" 45 #include "xfs_trace.h" 46 #include "xfs_icreate_item.h" 47 #include "xfs_dinode.h" 48 #include "xfs_filestream.h" 49 #include "xfs_quota.h" 50 #include "xfs_sysfs.h" 51 52 #include <linux/namei.h> 53 #include <linux/init.h> 54 #include <linux/slab.h> 55 #include <linux/mount.h> 56 #include <linux/mempool.h> 57 #include <linux/writeback.h> 58 #include <linux/kthread.h> 59 #include <linux/freezer.h> 60 #include <linux/parser.h> 61 62 static const struct super_operations xfs_super_operations; 63 static kmem_zone_t *xfs_ioend_zone; 64 mempool_t *xfs_ioend_pool; 65 66 static struct kset *xfs_kset; /* top-level xfs sysfs dir */ 67 #ifdef DEBUG 68 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ 69 #endif 70 71 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ 72 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ 73 #define MNTOPT_LOGDEV "logdev" /* log device */ 74 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ 75 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ 76 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ 77 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ 78 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ 79 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ 80 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ 81 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ 82 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ 83 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ 84 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ 85 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ 86 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ 87 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ 88 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ 89 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and 90 * unwritten extent conversion */ 91 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ 92 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ 93 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to 94 * XFS_MAXINUMBER_32 */ 95 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ 96 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ 97 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ 98 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes 99 * in stat(). */ 100 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ 101 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ 102 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ 103 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ 104 #define MNTOPT_NOQUOTA "noquota" /* no quotas */ 105 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ 106 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ 107 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ 108 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ 109 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ 110 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ 111 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ 112 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ 113 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ 114 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ 115 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */ 116 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */ 117 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ 118 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ 119 120 /* 121 * Table driven mount option parser. 122 * 123 * Currently only used for remount, but it will be used for mount 124 * in the future, too. 125 */ 126 enum { 127 Opt_barrier, 128 Opt_nobarrier, 129 Opt_inode64, 130 Opt_inode32, 131 Opt_err 132 }; 133 134 static const match_table_t tokens = { 135 {Opt_barrier, "barrier"}, 136 {Opt_nobarrier, "nobarrier"}, 137 {Opt_inode64, "inode64"}, 138 {Opt_inode32, "inode32"}, 139 {Opt_err, NULL} 140 }; 141 142 143 STATIC unsigned long 144 suffix_kstrtoint(char *s, unsigned int base, int *res) 145 { 146 int last, shift_left_factor = 0, _res; 147 char *value = s; 148 149 last = strlen(value) - 1; 150 if (value[last] == 'K' || value[last] == 'k') { 151 shift_left_factor = 10; 152 value[last] = '\0'; 153 } 154 if (value[last] == 'M' || value[last] == 'm') { 155 shift_left_factor = 20; 156 value[last] = '\0'; 157 } 158 if (value[last] == 'G' || value[last] == 'g') { 159 shift_left_factor = 30; 160 value[last] = '\0'; 161 } 162 163 if (kstrtoint(s, base, &_res)) 164 return -EINVAL; 165 *res = _res << shift_left_factor; 166 return 0; 167 } 168 169 /* 170 * This function fills in xfs_mount_t fields based on mount args. 171 * Note: the superblock has _not_ yet been read in. 172 * 173 * Note that this function leaks the various device name allocations on 174 * failure. The caller takes care of them. 175 */ 176 STATIC int 177 xfs_parseargs( 178 struct xfs_mount *mp, 179 char *options) 180 { 181 struct super_block *sb = mp->m_super; 182 char *this_char, *value; 183 int dsunit = 0; 184 int dswidth = 0; 185 int iosize = 0; 186 __uint8_t iosizelog = 0; 187 188 /* 189 * set up the mount name first so all the errors will refer to the 190 * correct device. 191 */ 192 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 193 if (!mp->m_fsname) 194 return -ENOMEM; 195 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 196 197 /* 198 * Copy binary VFS mount flags we are interested in. 199 */ 200 if (sb->s_flags & MS_RDONLY) 201 mp->m_flags |= XFS_MOUNT_RDONLY; 202 if (sb->s_flags & MS_DIRSYNC) 203 mp->m_flags |= XFS_MOUNT_DIRSYNC; 204 if (sb->s_flags & MS_SYNCHRONOUS) 205 mp->m_flags |= XFS_MOUNT_WSYNC; 206 207 /* 208 * Set some default flags that could be cleared by the mount option 209 * parsing. 210 */ 211 mp->m_flags |= XFS_MOUNT_BARRIER; 212 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 213 214 /* 215 * These can be overridden by the mount option parsing. 216 */ 217 mp->m_logbufs = -1; 218 mp->m_logbsize = -1; 219 220 if (!options) 221 goto done; 222 223 while ((this_char = strsep(&options, ",")) != NULL) { 224 if (!*this_char) 225 continue; 226 if ((value = strchr(this_char, '=')) != NULL) 227 *value++ = 0; 228 229 if (!strcmp(this_char, MNTOPT_LOGBUFS)) { 230 if (!value || !*value) { 231 xfs_warn(mp, "%s option requires an argument", 232 this_char); 233 return -EINVAL; 234 } 235 if (kstrtoint(value, 10, &mp->m_logbufs)) 236 return -EINVAL; 237 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { 238 if (!value || !*value) { 239 xfs_warn(mp, "%s option requires an argument", 240 this_char); 241 return -EINVAL; 242 } 243 if (suffix_kstrtoint(value, 10, &mp->m_logbsize)) 244 return -EINVAL; 245 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { 246 if (!value || !*value) { 247 xfs_warn(mp, "%s option requires an argument", 248 this_char); 249 return -EINVAL; 250 } 251 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 252 if (!mp->m_logname) 253 return -ENOMEM; 254 } else if (!strcmp(this_char, MNTOPT_MTPT)) { 255 xfs_warn(mp, "%s option not allowed on this system", 256 this_char); 257 return -EINVAL; 258 } else if (!strcmp(this_char, MNTOPT_RTDEV)) { 259 if (!value || !*value) { 260 xfs_warn(mp, "%s option requires an argument", 261 this_char); 262 return -EINVAL; 263 } 264 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 265 if (!mp->m_rtname) 266 return -ENOMEM; 267 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { 268 if (!value || !*value) { 269 xfs_warn(mp, "%s option requires an argument", 270 this_char); 271 return -EINVAL; 272 } 273 if (kstrtoint(value, 10, &iosize)) 274 return -EINVAL; 275 iosizelog = ffs(iosize) - 1; 276 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { 277 if (!value || !*value) { 278 xfs_warn(mp, "%s option requires an argument", 279 this_char); 280 return -EINVAL; 281 } 282 if (suffix_kstrtoint(value, 10, &iosize)) 283 return -EINVAL; 284 iosizelog = ffs(iosize) - 1; 285 } else if (!strcmp(this_char, MNTOPT_GRPID) || 286 !strcmp(this_char, MNTOPT_BSDGROUPS)) { 287 mp->m_flags |= XFS_MOUNT_GRPID; 288 } else if (!strcmp(this_char, MNTOPT_NOGRPID) || 289 !strcmp(this_char, MNTOPT_SYSVGROUPS)) { 290 mp->m_flags &= ~XFS_MOUNT_GRPID; 291 } else if (!strcmp(this_char, MNTOPT_WSYNC)) { 292 mp->m_flags |= XFS_MOUNT_WSYNC; 293 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { 294 mp->m_flags |= XFS_MOUNT_NORECOVERY; 295 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { 296 mp->m_flags |= XFS_MOUNT_NOALIGN; 297 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { 298 mp->m_flags |= XFS_MOUNT_SWALLOC; 299 } else if (!strcmp(this_char, MNTOPT_SUNIT)) { 300 if (!value || !*value) { 301 xfs_warn(mp, "%s option requires an argument", 302 this_char); 303 return -EINVAL; 304 } 305 if (kstrtoint(value, 10, &dsunit)) 306 return -EINVAL; 307 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { 308 if (!value || !*value) { 309 xfs_warn(mp, "%s option requires an argument", 310 this_char); 311 return -EINVAL; 312 } 313 if (kstrtoint(value, 10, &dswidth)) 314 return -EINVAL; 315 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) { 316 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 317 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { 318 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 319 } else if (!strcmp(this_char, MNTOPT_NOUUID)) { 320 mp->m_flags |= XFS_MOUNT_NOUUID; 321 } else if (!strcmp(this_char, MNTOPT_BARRIER)) { 322 mp->m_flags |= XFS_MOUNT_BARRIER; 323 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { 324 mp->m_flags &= ~XFS_MOUNT_BARRIER; 325 } else if (!strcmp(this_char, MNTOPT_IKEEP)) { 326 mp->m_flags |= XFS_MOUNT_IKEEP; 327 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { 328 mp->m_flags &= ~XFS_MOUNT_IKEEP; 329 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { 330 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 331 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { 332 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 333 } else if (!strcmp(this_char, MNTOPT_ATTR2)) { 334 mp->m_flags |= XFS_MOUNT_ATTR2; 335 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { 336 mp->m_flags &= ~XFS_MOUNT_ATTR2; 337 mp->m_flags |= XFS_MOUNT_NOATTR2; 338 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { 339 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 340 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { 341 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 342 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 343 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 344 } else if (!strcmp(this_char, MNTOPT_QUOTA) || 345 !strcmp(this_char, MNTOPT_UQUOTA) || 346 !strcmp(this_char, MNTOPT_USRQUOTA)) { 347 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 348 XFS_UQUOTA_ENFD); 349 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || 350 !strcmp(this_char, MNTOPT_UQUOTANOENF)) { 351 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 352 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 353 } else if (!strcmp(this_char, MNTOPT_PQUOTA) || 354 !strcmp(this_char, MNTOPT_PRJQUOTA)) { 355 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 356 XFS_PQUOTA_ENFD); 357 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { 358 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 359 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 360 } else if (!strcmp(this_char, MNTOPT_GQUOTA) || 361 !strcmp(this_char, MNTOPT_GRPQUOTA)) { 362 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 363 XFS_GQUOTA_ENFD); 364 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { 365 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 366 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 367 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { 368 xfs_warn(mp, 369 "delaylog is the default now, option is deprecated."); 370 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { 371 xfs_warn(mp, 372 "nodelaylog support has been removed, option is deprecated."); 373 } else if (!strcmp(this_char, MNTOPT_DISCARD)) { 374 mp->m_flags |= XFS_MOUNT_DISCARD; 375 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { 376 mp->m_flags &= ~XFS_MOUNT_DISCARD; 377 } else if (!strcmp(this_char, "ihashsize")) { 378 xfs_warn(mp, 379 "ihashsize no longer used, option is deprecated."); 380 } else if (!strcmp(this_char, "osyncisdsync")) { 381 xfs_warn(mp, 382 "osyncisdsync has no effect, option is deprecated."); 383 } else if (!strcmp(this_char, "osyncisosync")) { 384 xfs_warn(mp, 385 "osyncisosync has no effect, option is deprecated."); 386 } else if (!strcmp(this_char, "irixsgid")) { 387 xfs_warn(mp, 388 "irixsgid is now a sysctl(2) variable, option is deprecated."); 389 } else { 390 xfs_warn(mp, "unknown mount option [%s].", this_char); 391 return -EINVAL; 392 } 393 } 394 395 /* 396 * no recovery flag requires a read-only mount 397 */ 398 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 399 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 400 xfs_warn(mp, "no-recovery mounts must be read-only."); 401 return -EINVAL; 402 } 403 404 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 405 xfs_warn(mp, 406 "sunit and swidth options incompatible with the noalign option"); 407 return -EINVAL; 408 } 409 410 #ifndef CONFIG_XFS_QUOTA 411 if (XFS_IS_QUOTA_RUNNING(mp)) { 412 xfs_warn(mp, "quota support not available in this kernel."); 413 return -EINVAL; 414 } 415 #endif 416 417 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 418 xfs_warn(mp, "sunit and swidth must be specified together"); 419 return -EINVAL; 420 } 421 422 if (dsunit && (dswidth % dsunit != 0)) { 423 xfs_warn(mp, 424 "stripe width (%d) must be a multiple of the stripe unit (%d)", 425 dswidth, dsunit); 426 return -EINVAL; 427 } 428 429 done: 430 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { 431 /* 432 * At this point the superblock has not been read 433 * in, therefore we do not know the block size. 434 * Before the mount call ends we will convert 435 * these to FSBs. 436 */ 437 mp->m_dalign = dsunit; 438 mp->m_swidth = dswidth; 439 } 440 441 if (mp->m_logbufs != -1 && 442 mp->m_logbufs != 0 && 443 (mp->m_logbufs < XLOG_MIN_ICLOGS || 444 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 445 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 446 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 447 return -EINVAL; 448 } 449 if (mp->m_logbsize != -1 && 450 mp->m_logbsize != 0 && 451 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 452 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 453 !is_power_of_2(mp->m_logbsize))) { 454 xfs_warn(mp, 455 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 456 mp->m_logbsize); 457 return -EINVAL; 458 } 459 460 if (iosizelog) { 461 if (iosizelog > XFS_MAX_IO_LOG || 462 iosizelog < XFS_MIN_IO_LOG) { 463 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 464 iosizelog, XFS_MIN_IO_LOG, 465 XFS_MAX_IO_LOG); 466 return -EINVAL; 467 } 468 469 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 470 mp->m_readio_log = iosizelog; 471 mp->m_writeio_log = iosizelog; 472 } 473 474 return 0; 475 } 476 477 struct proc_xfs_info { 478 int flag; 479 char *str; 480 }; 481 482 STATIC int 483 xfs_showargs( 484 struct xfs_mount *mp, 485 struct seq_file *m) 486 { 487 static struct proc_xfs_info xfs_info_set[] = { 488 /* the few simple ones we can get from the mount struct */ 489 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP }, 490 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, 491 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, 492 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, 493 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, 494 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, 495 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, 496 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, 497 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, 498 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, 499 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE }, 500 { 0, NULL } 501 }; 502 static struct proc_xfs_info xfs_info_unset[] = { 503 /* the few simple ones we can get from the mount struct */ 504 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO }, 505 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, 506 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, 507 { 0, NULL } 508 }; 509 struct proc_xfs_info *xfs_infop; 510 511 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 512 if (mp->m_flags & xfs_infop->flag) 513 seq_puts(m, xfs_infop->str); 514 } 515 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 516 if (!(mp->m_flags & xfs_infop->flag)) 517 seq_puts(m, xfs_infop->str); 518 } 519 520 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 521 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", 522 (int)(1 << mp->m_writeio_log) >> 10); 523 524 if (mp->m_logbufs > 0) 525 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); 526 if (mp->m_logbsize > 0) 527 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); 528 529 if (mp->m_logname) 530 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); 531 if (mp->m_rtname) 532 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); 533 534 if (mp->m_dalign > 0) 535 seq_printf(m, "," MNTOPT_SUNIT "=%d", 536 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 537 if (mp->m_swidth > 0) 538 seq_printf(m, "," MNTOPT_SWIDTH "=%d", 539 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 540 541 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 542 seq_puts(m, "," MNTOPT_USRQUOTA); 543 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 544 seq_puts(m, "," MNTOPT_UQUOTANOENF); 545 546 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 547 if (mp->m_qflags & XFS_PQUOTA_ENFD) 548 seq_puts(m, "," MNTOPT_PRJQUOTA); 549 else 550 seq_puts(m, "," MNTOPT_PQUOTANOENF); 551 } 552 if (mp->m_qflags & XFS_GQUOTA_ACCT) { 553 if (mp->m_qflags & XFS_GQUOTA_ENFD) 554 seq_puts(m, "," MNTOPT_GRPQUOTA); 555 else 556 seq_puts(m, "," MNTOPT_GQUOTANOENF); 557 } 558 559 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 560 seq_puts(m, "," MNTOPT_NOQUOTA); 561 562 return 0; 563 } 564 __uint64_t 565 xfs_max_file_offset( 566 unsigned int blockshift) 567 { 568 unsigned int pagefactor = 1; 569 unsigned int bitshift = BITS_PER_LONG - 1; 570 571 /* Figure out maximum filesize, on Linux this can depend on 572 * the filesystem blocksize (on 32 bit platforms). 573 * __block_write_begin does this in an [unsigned] long... 574 * page->index << (PAGE_CACHE_SHIFT - bbits) 575 * So, for page sized blocks (4K on 32 bit platforms), 576 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 577 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 578 * but for smaller blocksizes it is less (bbits = log2 bsize). 579 * Note1: get_block_t takes a long (implicit cast from above) 580 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 581 * can optionally convert the [unsigned] long from above into 582 * an [unsigned] long long. 583 */ 584 585 #if BITS_PER_LONG == 32 586 # if defined(CONFIG_LBDAF) 587 ASSERT(sizeof(sector_t) == 8); 588 pagefactor = PAGE_CACHE_SIZE; 589 bitshift = BITS_PER_LONG; 590 # else 591 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 592 # endif 593 #endif 594 595 return (((__uint64_t)pagefactor) << bitshift) - 1; 596 } 597 598 /* 599 * xfs_set_inode32() and xfs_set_inode64() are passed an agcount 600 * because in the growfs case, mp->m_sb.sb_agcount is not updated 601 * yet to the potentially higher ag count. 602 */ 603 xfs_agnumber_t 604 xfs_set_inode32(struct xfs_mount *mp, xfs_agnumber_t agcount) 605 { 606 xfs_agnumber_t index = 0; 607 xfs_agnumber_t maxagi = 0; 608 xfs_sb_t *sbp = &mp->m_sb; 609 xfs_agnumber_t max_metadata; 610 xfs_agino_t agino; 611 xfs_ino_t ino; 612 xfs_perag_t *pag; 613 614 /* Calculate how much should be reserved for inodes to meet 615 * the max inode percentage. 616 */ 617 if (mp->m_maxicount) { 618 __uint64_t icount; 619 620 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 621 do_div(icount, 100); 622 icount += sbp->sb_agblocks - 1; 623 do_div(icount, sbp->sb_agblocks); 624 max_metadata = icount; 625 } else { 626 max_metadata = agcount; 627 } 628 629 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); 630 631 for (index = 0; index < agcount; index++) { 632 ino = XFS_AGINO_TO_INO(mp, index, agino); 633 634 if (ino > XFS_MAXINUMBER_32) { 635 pag = xfs_perag_get(mp, index); 636 pag->pagi_inodeok = 0; 637 pag->pagf_metadata = 0; 638 xfs_perag_put(pag); 639 continue; 640 } 641 642 pag = xfs_perag_get(mp, index); 643 pag->pagi_inodeok = 1; 644 maxagi++; 645 if (index < max_metadata) 646 pag->pagf_metadata = 1; 647 xfs_perag_put(pag); 648 } 649 mp->m_flags |= (XFS_MOUNT_32BITINODES | 650 XFS_MOUNT_SMALL_INUMS); 651 652 return maxagi; 653 } 654 655 xfs_agnumber_t 656 xfs_set_inode64(struct xfs_mount *mp, xfs_agnumber_t agcount) 657 { 658 xfs_agnumber_t index = 0; 659 660 for (index = 0; index < agcount; index++) { 661 struct xfs_perag *pag; 662 663 pag = xfs_perag_get(mp, index); 664 pag->pagi_inodeok = 1; 665 pag->pagf_metadata = 0; 666 xfs_perag_put(pag); 667 } 668 669 /* There is no need for lock protection on m_flags, 670 * the rw_semaphore of the VFS superblock is locked 671 * during mount/umount/remount operations, so this is 672 * enough to avoid concurency on the m_flags field 673 */ 674 mp->m_flags &= ~(XFS_MOUNT_32BITINODES | 675 XFS_MOUNT_SMALL_INUMS); 676 return index; 677 } 678 679 STATIC int 680 xfs_blkdev_get( 681 xfs_mount_t *mp, 682 const char *name, 683 struct block_device **bdevp) 684 { 685 int error = 0; 686 687 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 688 mp); 689 if (IS_ERR(*bdevp)) { 690 error = PTR_ERR(*bdevp); 691 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error); 692 } 693 694 return error; 695 } 696 697 STATIC void 698 xfs_blkdev_put( 699 struct block_device *bdev) 700 { 701 if (bdev) 702 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 703 } 704 705 void 706 xfs_blkdev_issue_flush( 707 xfs_buftarg_t *buftarg) 708 { 709 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 710 } 711 712 STATIC void 713 xfs_close_devices( 714 struct xfs_mount *mp) 715 { 716 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 717 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 718 xfs_free_buftarg(mp, mp->m_logdev_targp); 719 xfs_blkdev_put(logdev); 720 } 721 if (mp->m_rtdev_targp) { 722 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 723 xfs_free_buftarg(mp, mp->m_rtdev_targp); 724 xfs_blkdev_put(rtdev); 725 } 726 xfs_free_buftarg(mp, mp->m_ddev_targp); 727 } 728 729 /* 730 * The file system configurations are: 731 * (1) device (partition) with data and internal log 732 * (2) logical volume with data and log subvolumes. 733 * (3) logical volume with data, log, and realtime subvolumes. 734 * 735 * We only have to handle opening the log and realtime volumes here if 736 * they are present. The data subvolume has already been opened by 737 * get_sb_bdev() and is stored in sb->s_bdev. 738 */ 739 STATIC int 740 xfs_open_devices( 741 struct xfs_mount *mp) 742 { 743 struct block_device *ddev = mp->m_super->s_bdev; 744 struct block_device *logdev = NULL, *rtdev = NULL; 745 int error; 746 747 /* 748 * Open real time and log devices - order is important. 749 */ 750 if (mp->m_logname) { 751 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 752 if (error) 753 goto out; 754 } 755 756 if (mp->m_rtname) { 757 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 758 if (error) 759 goto out_close_logdev; 760 761 if (rtdev == ddev || rtdev == logdev) { 762 xfs_warn(mp, 763 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 764 error = -EINVAL; 765 goto out_close_rtdev; 766 } 767 } 768 769 /* 770 * Setup xfs_mount buffer target pointers 771 */ 772 error = -ENOMEM; 773 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev); 774 if (!mp->m_ddev_targp) 775 goto out_close_rtdev; 776 777 if (rtdev) { 778 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev); 779 if (!mp->m_rtdev_targp) 780 goto out_free_ddev_targ; 781 } 782 783 if (logdev && logdev != ddev) { 784 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev); 785 if (!mp->m_logdev_targp) 786 goto out_free_rtdev_targ; 787 } else { 788 mp->m_logdev_targp = mp->m_ddev_targp; 789 } 790 791 return 0; 792 793 out_free_rtdev_targ: 794 if (mp->m_rtdev_targp) 795 xfs_free_buftarg(mp, mp->m_rtdev_targp); 796 out_free_ddev_targ: 797 xfs_free_buftarg(mp, mp->m_ddev_targp); 798 out_close_rtdev: 799 if (rtdev) 800 xfs_blkdev_put(rtdev); 801 out_close_logdev: 802 if (logdev && logdev != ddev) 803 xfs_blkdev_put(logdev); 804 out: 805 return error; 806 } 807 808 /* 809 * Setup xfs_mount buffer target pointers based on superblock 810 */ 811 STATIC int 812 xfs_setup_devices( 813 struct xfs_mount *mp) 814 { 815 int error; 816 817 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); 818 if (error) 819 return error; 820 821 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 822 unsigned int log_sector_size = BBSIZE; 823 824 if (xfs_sb_version_hassector(&mp->m_sb)) 825 log_sector_size = mp->m_sb.sb_logsectsize; 826 error = xfs_setsize_buftarg(mp->m_logdev_targp, 827 log_sector_size); 828 if (error) 829 return error; 830 } 831 if (mp->m_rtdev_targp) { 832 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 833 mp->m_sb.sb_sectsize); 834 if (error) 835 return error; 836 } 837 838 return 0; 839 } 840 841 STATIC int 842 xfs_init_mount_workqueues( 843 struct xfs_mount *mp) 844 { 845 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 846 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 847 if (!mp->m_data_workqueue) 848 goto out; 849 850 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 851 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 852 if (!mp->m_unwritten_workqueue) 853 goto out_destroy_data_iodone_queue; 854 855 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 856 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 857 if (!mp->m_cil_workqueue) 858 goto out_destroy_unwritten; 859 860 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 861 WQ_FREEZABLE, 0, mp->m_fsname); 862 if (!mp->m_reclaim_workqueue) 863 goto out_destroy_cil; 864 865 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", 866 WQ_FREEZABLE, 0, mp->m_fsname); 867 if (!mp->m_log_workqueue) 868 goto out_destroy_reclaim; 869 870 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", 871 WQ_FREEZABLE, 0, mp->m_fsname); 872 if (!mp->m_eofblocks_workqueue) 873 goto out_destroy_log; 874 875 return 0; 876 877 out_destroy_log: 878 destroy_workqueue(mp->m_log_workqueue); 879 out_destroy_reclaim: 880 destroy_workqueue(mp->m_reclaim_workqueue); 881 out_destroy_cil: 882 destroy_workqueue(mp->m_cil_workqueue); 883 out_destroy_unwritten: 884 destroy_workqueue(mp->m_unwritten_workqueue); 885 out_destroy_data_iodone_queue: 886 destroy_workqueue(mp->m_data_workqueue); 887 out: 888 return -ENOMEM; 889 } 890 891 STATIC void 892 xfs_destroy_mount_workqueues( 893 struct xfs_mount *mp) 894 { 895 destroy_workqueue(mp->m_eofblocks_workqueue); 896 destroy_workqueue(mp->m_log_workqueue); 897 destroy_workqueue(mp->m_reclaim_workqueue); 898 destroy_workqueue(mp->m_cil_workqueue); 899 destroy_workqueue(mp->m_data_workqueue); 900 destroy_workqueue(mp->m_unwritten_workqueue); 901 } 902 903 /* 904 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 905 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 906 * for IO to complete so that we effectively throttle multiple callers to the 907 * rate at which IO is completing. 908 */ 909 void 910 xfs_flush_inodes( 911 struct xfs_mount *mp) 912 { 913 struct super_block *sb = mp->m_super; 914 915 if (down_read_trylock(&sb->s_umount)) { 916 sync_inodes_sb(sb); 917 up_read(&sb->s_umount); 918 } 919 } 920 921 /* Catch misguided souls that try to use this interface on XFS */ 922 STATIC struct inode * 923 xfs_fs_alloc_inode( 924 struct super_block *sb) 925 { 926 BUG(); 927 return NULL; 928 } 929 930 /* 931 * Now that the generic code is guaranteed not to be accessing 932 * the linux inode, we can reclaim the inode. 933 */ 934 STATIC void 935 xfs_fs_destroy_inode( 936 struct inode *inode) 937 { 938 struct xfs_inode *ip = XFS_I(inode); 939 940 trace_xfs_destroy_inode(ip); 941 942 XFS_STATS_INC(vn_reclaim); 943 944 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 945 946 /* 947 * We should never get here with one of the reclaim flags already set. 948 */ 949 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 950 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 951 952 /* 953 * We always use background reclaim here because even if the 954 * inode is clean, it still may be under IO and hence we have 955 * to take the flush lock. The background reclaim path handles 956 * this more efficiently than we can here, so simply let background 957 * reclaim tear down all inodes. 958 */ 959 xfs_inode_set_reclaim_tag(ip); 960 } 961 962 /* 963 * Slab object creation initialisation for the XFS inode. 964 * This covers only the idempotent fields in the XFS inode; 965 * all other fields need to be initialised on allocation 966 * from the slab. This avoids the need to repeatedly initialise 967 * fields in the xfs inode that left in the initialise state 968 * when freeing the inode. 969 */ 970 STATIC void 971 xfs_fs_inode_init_once( 972 void *inode) 973 { 974 struct xfs_inode *ip = inode; 975 976 memset(ip, 0, sizeof(struct xfs_inode)); 977 978 /* vfs inode */ 979 inode_init_once(VFS_I(ip)); 980 981 /* xfs inode */ 982 atomic_set(&ip->i_pincount, 0); 983 spin_lock_init(&ip->i_flags_lock); 984 985 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 986 "xfsino", ip->i_ino); 987 } 988 989 STATIC void 990 xfs_fs_evict_inode( 991 struct inode *inode) 992 { 993 xfs_inode_t *ip = XFS_I(inode); 994 995 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 996 997 trace_xfs_evict_inode(ip); 998 999 truncate_inode_pages_final(&inode->i_data); 1000 clear_inode(inode); 1001 XFS_STATS_INC(vn_rele); 1002 XFS_STATS_INC(vn_remove); 1003 XFS_STATS_DEC(vn_active); 1004 1005 xfs_inactive(ip); 1006 } 1007 1008 /* 1009 * We do an unlocked check for XFS_IDONTCACHE here because we are already 1010 * serialised against cache hits here via the inode->i_lock and igrab() in 1011 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 1012 * racing with us, and it avoids needing to grab a spinlock here for every inode 1013 * we drop the final reference on. 1014 */ 1015 STATIC int 1016 xfs_fs_drop_inode( 1017 struct inode *inode) 1018 { 1019 struct xfs_inode *ip = XFS_I(inode); 1020 1021 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 1022 } 1023 1024 STATIC void 1025 xfs_free_fsname( 1026 struct xfs_mount *mp) 1027 { 1028 kfree(mp->m_fsname); 1029 kfree(mp->m_rtname); 1030 kfree(mp->m_logname); 1031 } 1032 1033 STATIC void 1034 xfs_fs_put_super( 1035 struct super_block *sb) 1036 { 1037 struct xfs_mount *mp = XFS_M(sb); 1038 1039 xfs_filestream_unmount(mp); 1040 xfs_unmountfs(mp); 1041 1042 xfs_freesb(mp); 1043 xfs_icsb_destroy_counters(mp); 1044 xfs_destroy_mount_workqueues(mp); 1045 xfs_close_devices(mp); 1046 xfs_free_fsname(mp); 1047 kfree(mp); 1048 } 1049 1050 STATIC int 1051 xfs_fs_sync_fs( 1052 struct super_block *sb, 1053 int wait) 1054 { 1055 struct xfs_mount *mp = XFS_M(sb); 1056 1057 /* 1058 * Doing anything during the async pass would be counterproductive. 1059 */ 1060 if (!wait) 1061 return 0; 1062 1063 xfs_log_force(mp, XFS_LOG_SYNC); 1064 if (laptop_mode) { 1065 /* 1066 * The disk must be active because we're syncing. 1067 * We schedule log work now (now that the disk is 1068 * active) instead of later (when it might not be). 1069 */ 1070 flush_delayed_work(&mp->m_log->l_work); 1071 } 1072 1073 return 0; 1074 } 1075 1076 STATIC int 1077 xfs_fs_statfs( 1078 struct dentry *dentry, 1079 struct kstatfs *statp) 1080 { 1081 struct xfs_mount *mp = XFS_M(dentry->d_sb); 1082 xfs_sb_t *sbp = &mp->m_sb; 1083 struct xfs_inode *ip = XFS_I(dentry->d_inode); 1084 __uint64_t fakeinos, id; 1085 xfs_extlen_t lsize; 1086 __int64_t ffree; 1087 1088 statp->f_type = XFS_SB_MAGIC; 1089 statp->f_namelen = MAXNAMELEN - 1; 1090 1091 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 1092 statp->f_fsid.val[0] = (u32)id; 1093 statp->f_fsid.val[1] = (u32)(id >> 32); 1094 1095 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 1096 1097 spin_lock(&mp->m_sb_lock); 1098 statp->f_bsize = sbp->sb_blocksize; 1099 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 1100 statp->f_blocks = sbp->sb_dblocks - lsize; 1101 statp->f_bfree = statp->f_bavail = 1102 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 1103 fakeinos = statp->f_bfree << sbp->sb_inopblog; 1104 statp->f_files = 1105 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 1106 if (mp->m_maxicount) 1107 statp->f_files = min_t(typeof(statp->f_files), 1108 statp->f_files, 1109 mp->m_maxicount); 1110 1111 /* make sure statp->f_ffree does not underflow */ 1112 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); 1113 statp->f_ffree = max_t(__int64_t, ffree, 0); 1114 1115 spin_unlock(&mp->m_sb_lock); 1116 1117 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1118 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 1119 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 1120 xfs_qm_statvfs(ip, statp); 1121 return 0; 1122 } 1123 1124 STATIC void 1125 xfs_save_resvblks(struct xfs_mount *mp) 1126 { 1127 __uint64_t resblks = 0; 1128 1129 mp->m_resblks_save = mp->m_resblks; 1130 xfs_reserve_blocks(mp, &resblks, NULL); 1131 } 1132 1133 STATIC void 1134 xfs_restore_resvblks(struct xfs_mount *mp) 1135 { 1136 __uint64_t resblks; 1137 1138 if (mp->m_resblks_save) { 1139 resblks = mp->m_resblks_save; 1140 mp->m_resblks_save = 0; 1141 } else 1142 resblks = xfs_default_resblks(mp); 1143 1144 xfs_reserve_blocks(mp, &resblks, NULL); 1145 } 1146 1147 /* 1148 * Trigger writeback of all the dirty metadata in the file system. 1149 * 1150 * This ensures that the metadata is written to their location on disk rather 1151 * than just existing in transactions in the log. This means after a quiesce 1152 * there is no log replay required to write the inodes to disk - this is the 1153 * primary difference between a sync and a quiesce. 1154 * 1155 * Note: xfs_log_quiesce() stops background log work - the callers must ensure 1156 * it is started again when appropriate. 1157 */ 1158 static void 1159 xfs_quiesce_attr( 1160 struct xfs_mount *mp) 1161 { 1162 int error = 0; 1163 1164 /* wait for all modifications to complete */ 1165 while (atomic_read(&mp->m_active_trans) > 0) 1166 delay(100); 1167 1168 /* force the log to unpin objects from the now complete transactions */ 1169 xfs_log_force(mp, XFS_LOG_SYNC); 1170 1171 /* reclaim inodes to do any IO before the freeze completes */ 1172 xfs_reclaim_inodes(mp, 0); 1173 xfs_reclaim_inodes(mp, SYNC_WAIT); 1174 1175 /* Push the superblock and write an unmount record */ 1176 error = xfs_log_sbcount(mp); 1177 if (error) 1178 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " 1179 "Frozen image may not be consistent."); 1180 /* 1181 * Just warn here till VFS can correctly support 1182 * read-only remount without racing. 1183 */ 1184 WARN_ON(atomic_read(&mp->m_active_trans) != 0); 1185 1186 xfs_log_quiesce(mp); 1187 } 1188 1189 STATIC int 1190 xfs_fs_remount( 1191 struct super_block *sb, 1192 int *flags, 1193 char *options) 1194 { 1195 struct xfs_mount *mp = XFS_M(sb); 1196 xfs_sb_t *sbp = &mp->m_sb; 1197 substring_t args[MAX_OPT_ARGS]; 1198 char *p; 1199 int error; 1200 1201 sync_filesystem(sb); 1202 while ((p = strsep(&options, ",")) != NULL) { 1203 int token; 1204 1205 if (!*p) 1206 continue; 1207 1208 token = match_token(p, tokens, args); 1209 switch (token) { 1210 case Opt_barrier: 1211 mp->m_flags |= XFS_MOUNT_BARRIER; 1212 break; 1213 case Opt_nobarrier: 1214 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1215 break; 1216 case Opt_inode64: 1217 mp->m_maxagi = xfs_set_inode64(mp, sbp->sb_agcount); 1218 break; 1219 case Opt_inode32: 1220 mp->m_maxagi = xfs_set_inode32(mp, sbp->sb_agcount); 1221 break; 1222 default: 1223 /* 1224 * Logically we would return an error here to prevent 1225 * users from believing they might have changed 1226 * mount options using remount which can't be changed. 1227 * 1228 * But unfortunately mount(8) adds all options from 1229 * mtab and fstab to the mount arguments in some cases 1230 * so we can't blindly reject options, but have to 1231 * check for each specified option if it actually 1232 * differs from the currently set option and only 1233 * reject it if that's the case. 1234 * 1235 * Until that is implemented we return success for 1236 * every remount request, and silently ignore all 1237 * options that we can't actually change. 1238 */ 1239 #if 0 1240 xfs_info(mp, 1241 "mount option \"%s\" not supported for remount", p); 1242 return -EINVAL; 1243 #else 1244 break; 1245 #endif 1246 } 1247 } 1248 1249 /* ro -> rw */ 1250 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1251 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1252 1253 /* 1254 * If this is the first remount to writeable state we 1255 * might have some superblock changes to update. 1256 */ 1257 if (mp->m_update_flags) { 1258 error = xfs_mount_log_sb(mp, mp->m_update_flags); 1259 if (error) { 1260 xfs_warn(mp, "failed to write sb changes"); 1261 return error; 1262 } 1263 mp->m_update_flags = 0; 1264 } 1265 1266 /* 1267 * Fill out the reserve pool if it is empty. Use the stashed 1268 * value if it is non-zero, otherwise go with the default. 1269 */ 1270 xfs_restore_resvblks(mp); 1271 xfs_log_work_queue(mp); 1272 } 1273 1274 /* rw -> ro */ 1275 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1276 /* 1277 * Before we sync the metadata, we need to free up the reserve 1278 * block pool so that the used block count in the superblock on 1279 * disk is correct at the end of the remount. Stash the current 1280 * reserve pool size so that if we get remounted rw, we can 1281 * return it to the same size. 1282 */ 1283 xfs_save_resvblks(mp); 1284 xfs_quiesce_attr(mp); 1285 mp->m_flags |= XFS_MOUNT_RDONLY; 1286 } 1287 1288 return 0; 1289 } 1290 1291 /* 1292 * Second stage of a freeze. The data is already frozen so we only 1293 * need to take care of the metadata. Once that's done write a dummy 1294 * record to dirty the log in case of a crash while frozen. 1295 */ 1296 STATIC int 1297 xfs_fs_freeze( 1298 struct super_block *sb) 1299 { 1300 struct xfs_mount *mp = XFS_M(sb); 1301 1302 xfs_save_resvblks(mp); 1303 xfs_quiesce_attr(mp); 1304 return xfs_fs_log_dummy(mp); 1305 } 1306 1307 STATIC int 1308 xfs_fs_unfreeze( 1309 struct super_block *sb) 1310 { 1311 struct xfs_mount *mp = XFS_M(sb); 1312 1313 xfs_restore_resvblks(mp); 1314 xfs_log_work_queue(mp); 1315 return 0; 1316 } 1317 1318 STATIC int 1319 xfs_fs_show_options( 1320 struct seq_file *m, 1321 struct dentry *root) 1322 { 1323 return xfs_showargs(XFS_M(root->d_sb), m); 1324 } 1325 1326 /* 1327 * This function fills in xfs_mount_t fields based on mount args. 1328 * Note: the superblock _has_ now been read in. 1329 */ 1330 STATIC int 1331 xfs_finish_flags( 1332 struct xfs_mount *mp) 1333 { 1334 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1335 1336 /* Fail a mount where the logbuf is smaller than the log stripe */ 1337 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1338 if (mp->m_logbsize <= 0 && 1339 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1340 mp->m_logbsize = mp->m_sb.sb_logsunit; 1341 } else if (mp->m_logbsize > 0 && 1342 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1343 xfs_warn(mp, 1344 "logbuf size must be greater than or equal to log stripe size"); 1345 return -EINVAL; 1346 } 1347 } else { 1348 /* Fail a mount if the logbuf is larger than 32K */ 1349 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1350 xfs_warn(mp, 1351 "logbuf size for version 1 logs must be 16K or 32K"); 1352 return -EINVAL; 1353 } 1354 } 1355 1356 /* 1357 * V5 filesystems always use attr2 format for attributes. 1358 */ 1359 if (xfs_sb_version_hascrc(&mp->m_sb) && 1360 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 1361 xfs_warn(mp, 1362 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.", 1363 MNTOPT_NOATTR2, MNTOPT_ATTR2); 1364 return -EINVAL; 1365 } 1366 1367 /* 1368 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1369 * told by noattr2 to turn it off 1370 */ 1371 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1372 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1373 mp->m_flags |= XFS_MOUNT_ATTR2; 1374 1375 /* 1376 * prohibit r/w mounts of read-only filesystems 1377 */ 1378 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1379 xfs_warn(mp, 1380 "cannot mount a read-only filesystem as read-write"); 1381 return -EROFS; 1382 } 1383 1384 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 1385 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && 1386 !xfs_sb_version_has_pquotino(&mp->m_sb)) { 1387 xfs_warn(mp, 1388 "Super block does not support project and group quota together"); 1389 return -EINVAL; 1390 } 1391 1392 return 0; 1393 } 1394 1395 STATIC int 1396 xfs_fs_fill_super( 1397 struct super_block *sb, 1398 void *data, 1399 int silent) 1400 { 1401 struct inode *root; 1402 struct xfs_mount *mp = NULL; 1403 int flags = 0, error = -ENOMEM; 1404 1405 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1406 if (!mp) 1407 goto out; 1408 1409 spin_lock_init(&mp->m_sb_lock); 1410 mutex_init(&mp->m_growlock); 1411 atomic_set(&mp->m_active_trans, 0); 1412 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1413 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); 1414 mp->m_kobj.kobject.kset = xfs_kset; 1415 1416 mp->m_super = sb; 1417 sb->s_fs_info = mp; 1418 1419 error = xfs_parseargs(mp, (char *)data); 1420 if (error) 1421 goto out_free_fsname; 1422 1423 sb_min_blocksize(sb, BBSIZE); 1424 sb->s_xattr = xfs_xattr_handlers; 1425 sb->s_export_op = &xfs_export_operations; 1426 #ifdef CONFIG_XFS_QUOTA 1427 sb->s_qcop = &xfs_quotactl_operations; 1428 #endif 1429 sb->s_op = &xfs_super_operations; 1430 1431 if (silent) 1432 flags |= XFS_MFSI_QUIET; 1433 1434 error = xfs_open_devices(mp); 1435 if (error) 1436 goto out_free_fsname; 1437 1438 error = xfs_init_mount_workqueues(mp); 1439 if (error) 1440 goto out_close_devices; 1441 1442 error = xfs_icsb_init_counters(mp); 1443 if (error) 1444 goto out_destroy_workqueues; 1445 1446 error = xfs_readsb(mp, flags); 1447 if (error) 1448 goto out_destroy_counters; 1449 1450 error = xfs_finish_flags(mp); 1451 if (error) 1452 goto out_free_sb; 1453 1454 error = xfs_setup_devices(mp); 1455 if (error) 1456 goto out_free_sb; 1457 1458 error = xfs_filestream_mount(mp); 1459 if (error) 1460 goto out_free_sb; 1461 1462 /* 1463 * we must configure the block size in the superblock before we run the 1464 * full mount process as the mount process can lookup and cache inodes. 1465 */ 1466 sb->s_magic = XFS_SB_MAGIC; 1467 sb->s_blocksize = mp->m_sb.sb_blocksize; 1468 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1469 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1470 sb->s_max_links = XFS_MAXLINK; 1471 sb->s_time_gran = 1; 1472 set_posix_acl_flag(sb); 1473 1474 /* version 5 superblocks support inode version counters. */ 1475 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1476 sb->s_flags |= MS_I_VERSION; 1477 1478 error = xfs_mountfs(mp); 1479 if (error) 1480 goto out_filestream_unmount; 1481 1482 root = igrab(VFS_I(mp->m_rootip)); 1483 if (!root) { 1484 error = -ENOENT; 1485 goto out_unmount; 1486 } 1487 sb->s_root = d_make_root(root); 1488 if (!sb->s_root) { 1489 error = -ENOMEM; 1490 goto out_unmount; 1491 } 1492 1493 return 0; 1494 1495 out_filestream_unmount: 1496 xfs_filestream_unmount(mp); 1497 out_free_sb: 1498 xfs_freesb(mp); 1499 out_destroy_counters: 1500 xfs_icsb_destroy_counters(mp); 1501 out_destroy_workqueues: 1502 xfs_destroy_mount_workqueues(mp); 1503 out_close_devices: 1504 xfs_close_devices(mp); 1505 out_free_fsname: 1506 xfs_free_fsname(mp); 1507 kfree(mp); 1508 out: 1509 return error; 1510 1511 out_unmount: 1512 xfs_filestream_unmount(mp); 1513 xfs_unmountfs(mp); 1514 goto out_free_sb; 1515 } 1516 1517 STATIC struct dentry * 1518 xfs_fs_mount( 1519 struct file_system_type *fs_type, 1520 int flags, 1521 const char *dev_name, 1522 void *data) 1523 { 1524 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1525 } 1526 1527 static long 1528 xfs_fs_nr_cached_objects( 1529 struct super_block *sb, 1530 int nid) 1531 { 1532 return xfs_reclaim_inodes_count(XFS_M(sb)); 1533 } 1534 1535 static long 1536 xfs_fs_free_cached_objects( 1537 struct super_block *sb, 1538 long nr_to_scan, 1539 int nid) 1540 { 1541 return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan); 1542 } 1543 1544 static const struct super_operations xfs_super_operations = { 1545 .alloc_inode = xfs_fs_alloc_inode, 1546 .destroy_inode = xfs_fs_destroy_inode, 1547 .evict_inode = xfs_fs_evict_inode, 1548 .drop_inode = xfs_fs_drop_inode, 1549 .put_super = xfs_fs_put_super, 1550 .sync_fs = xfs_fs_sync_fs, 1551 .freeze_fs = xfs_fs_freeze, 1552 .unfreeze_fs = xfs_fs_unfreeze, 1553 .statfs = xfs_fs_statfs, 1554 .remount_fs = xfs_fs_remount, 1555 .show_options = xfs_fs_show_options, 1556 .nr_cached_objects = xfs_fs_nr_cached_objects, 1557 .free_cached_objects = xfs_fs_free_cached_objects, 1558 }; 1559 1560 static struct file_system_type xfs_fs_type = { 1561 .owner = THIS_MODULE, 1562 .name = "xfs", 1563 .mount = xfs_fs_mount, 1564 .kill_sb = kill_block_super, 1565 .fs_flags = FS_REQUIRES_DEV, 1566 }; 1567 MODULE_ALIAS_FS("xfs"); 1568 1569 STATIC int __init 1570 xfs_init_zones(void) 1571 { 1572 1573 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1574 if (!xfs_ioend_zone) 1575 goto out; 1576 1577 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1578 xfs_ioend_zone); 1579 if (!xfs_ioend_pool) 1580 goto out_destroy_ioend_zone; 1581 1582 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1583 "xfs_log_ticket"); 1584 if (!xfs_log_ticket_zone) 1585 goto out_destroy_ioend_pool; 1586 1587 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1588 "xfs_bmap_free_item"); 1589 if (!xfs_bmap_free_item_zone) 1590 goto out_destroy_log_ticket_zone; 1591 1592 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1593 "xfs_btree_cur"); 1594 if (!xfs_btree_cur_zone) 1595 goto out_destroy_bmap_free_item_zone; 1596 1597 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1598 "xfs_da_state"); 1599 if (!xfs_da_state_zone) 1600 goto out_destroy_btree_cur_zone; 1601 1602 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1603 if (!xfs_ifork_zone) 1604 goto out_destroy_da_state_zone; 1605 1606 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1607 if (!xfs_trans_zone) 1608 goto out_destroy_ifork_zone; 1609 1610 xfs_log_item_desc_zone = 1611 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1612 "xfs_log_item_desc"); 1613 if (!xfs_log_item_desc_zone) 1614 goto out_destroy_trans_zone; 1615 1616 /* 1617 * The size of the zone allocated buf log item is the maximum 1618 * size possible under XFS. This wastes a little bit of memory, 1619 * but it is much faster. 1620 */ 1621 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1622 "xfs_buf_item"); 1623 if (!xfs_buf_item_zone) 1624 goto out_destroy_log_item_desc_zone; 1625 1626 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1627 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1628 sizeof(xfs_extent_t))), "xfs_efd_item"); 1629 if (!xfs_efd_zone) 1630 goto out_destroy_buf_item_zone; 1631 1632 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1633 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1634 sizeof(xfs_extent_t))), "xfs_efi_item"); 1635 if (!xfs_efi_zone) 1636 goto out_destroy_efd_zone; 1637 1638 xfs_inode_zone = 1639 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1640 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1641 xfs_fs_inode_init_once); 1642 if (!xfs_inode_zone) 1643 goto out_destroy_efi_zone; 1644 1645 xfs_ili_zone = 1646 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1647 KM_ZONE_SPREAD, NULL); 1648 if (!xfs_ili_zone) 1649 goto out_destroy_inode_zone; 1650 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), 1651 "xfs_icr"); 1652 if (!xfs_icreate_zone) 1653 goto out_destroy_ili_zone; 1654 1655 return 0; 1656 1657 out_destroy_ili_zone: 1658 kmem_zone_destroy(xfs_ili_zone); 1659 out_destroy_inode_zone: 1660 kmem_zone_destroy(xfs_inode_zone); 1661 out_destroy_efi_zone: 1662 kmem_zone_destroy(xfs_efi_zone); 1663 out_destroy_efd_zone: 1664 kmem_zone_destroy(xfs_efd_zone); 1665 out_destroy_buf_item_zone: 1666 kmem_zone_destroy(xfs_buf_item_zone); 1667 out_destroy_log_item_desc_zone: 1668 kmem_zone_destroy(xfs_log_item_desc_zone); 1669 out_destroy_trans_zone: 1670 kmem_zone_destroy(xfs_trans_zone); 1671 out_destroy_ifork_zone: 1672 kmem_zone_destroy(xfs_ifork_zone); 1673 out_destroy_da_state_zone: 1674 kmem_zone_destroy(xfs_da_state_zone); 1675 out_destroy_btree_cur_zone: 1676 kmem_zone_destroy(xfs_btree_cur_zone); 1677 out_destroy_bmap_free_item_zone: 1678 kmem_zone_destroy(xfs_bmap_free_item_zone); 1679 out_destroy_log_ticket_zone: 1680 kmem_zone_destroy(xfs_log_ticket_zone); 1681 out_destroy_ioend_pool: 1682 mempool_destroy(xfs_ioend_pool); 1683 out_destroy_ioend_zone: 1684 kmem_zone_destroy(xfs_ioend_zone); 1685 out: 1686 return -ENOMEM; 1687 } 1688 1689 STATIC void 1690 xfs_destroy_zones(void) 1691 { 1692 /* 1693 * Make sure all delayed rcu free are flushed before we 1694 * destroy caches. 1695 */ 1696 rcu_barrier(); 1697 kmem_zone_destroy(xfs_icreate_zone); 1698 kmem_zone_destroy(xfs_ili_zone); 1699 kmem_zone_destroy(xfs_inode_zone); 1700 kmem_zone_destroy(xfs_efi_zone); 1701 kmem_zone_destroy(xfs_efd_zone); 1702 kmem_zone_destroy(xfs_buf_item_zone); 1703 kmem_zone_destroy(xfs_log_item_desc_zone); 1704 kmem_zone_destroy(xfs_trans_zone); 1705 kmem_zone_destroy(xfs_ifork_zone); 1706 kmem_zone_destroy(xfs_da_state_zone); 1707 kmem_zone_destroy(xfs_btree_cur_zone); 1708 kmem_zone_destroy(xfs_bmap_free_item_zone); 1709 kmem_zone_destroy(xfs_log_ticket_zone); 1710 mempool_destroy(xfs_ioend_pool); 1711 kmem_zone_destroy(xfs_ioend_zone); 1712 1713 } 1714 1715 STATIC int __init 1716 xfs_init_workqueues(void) 1717 { 1718 /* 1719 * The allocation workqueue can be used in memory reclaim situations 1720 * (writepage path), and parallelism is only limited by the number of 1721 * AGs in all the filesystems mounted. Hence use the default large 1722 * max_active value for this workqueue. 1723 */ 1724 xfs_alloc_wq = alloc_workqueue("xfsalloc", 1725 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0); 1726 if (!xfs_alloc_wq) 1727 return -ENOMEM; 1728 1729 return 0; 1730 } 1731 1732 STATIC void 1733 xfs_destroy_workqueues(void) 1734 { 1735 destroy_workqueue(xfs_alloc_wq); 1736 } 1737 1738 STATIC int __init 1739 init_xfs_fs(void) 1740 { 1741 int error; 1742 1743 printk(KERN_INFO XFS_VERSION_STRING " with " 1744 XFS_BUILD_OPTIONS " enabled\n"); 1745 1746 xfs_dir_startup(); 1747 1748 error = xfs_init_zones(); 1749 if (error) 1750 goto out; 1751 1752 error = xfs_init_workqueues(); 1753 if (error) 1754 goto out_destroy_zones; 1755 1756 error = xfs_mru_cache_init(); 1757 if (error) 1758 goto out_destroy_wq; 1759 1760 error = xfs_buf_init(); 1761 if (error) 1762 goto out_mru_cache_uninit; 1763 1764 error = xfs_init_procfs(); 1765 if (error) 1766 goto out_buf_terminate; 1767 1768 error = xfs_sysctl_register(); 1769 if (error) 1770 goto out_cleanup_procfs; 1771 1772 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); 1773 if (!xfs_kset) { 1774 error = -ENOMEM; 1775 goto out_sysctl_unregister;; 1776 } 1777 1778 #ifdef DEBUG 1779 xfs_dbg_kobj.kobject.kset = xfs_kset; 1780 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug"); 1781 if (error) 1782 goto out_kset_unregister; 1783 #endif 1784 1785 error = xfs_qm_init(); 1786 if (error) 1787 goto out_remove_kobj; 1788 1789 error = register_filesystem(&xfs_fs_type); 1790 if (error) 1791 goto out_qm_exit; 1792 return 0; 1793 1794 out_qm_exit: 1795 xfs_qm_exit(); 1796 out_remove_kobj: 1797 #ifdef DEBUG 1798 xfs_sysfs_del(&xfs_dbg_kobj); 1799 out_kset_unregister: 1800 #endif 1801 kset_unregister(xfs_kset); 1802 out_sysctl_unregister: 1803 xfs_sysctl_unregister(); 1804 out_cleanup_procfs: 1805 xfs_cleanup_procfs(); 1806 out_buf_terminate: 1807 xfs_buf_terminate(); 1808 out_mru_cache_uninit: 1809 xfs_mru_cache_uninit(); 1810 out_destroy_wq: 1811 xfs_destroy_workqueues(); 1812 out_destroy_zones: 1813 xfs_destroy_zones(); 1814 out: 1815 return error; 1816 } 1817 1818 STATIC void __exit 1819 exit_xfs_fs(void) 1820 { 1821 xfs_qm_exit(); 1822 unregister_filesystem(&xfs_fs_type); 1823 #ifdef DEBUG 1824 xfs_sysfs_del(&xfs_dbg_kobj); 1825 #endif 1826 kset_unregister(xfs_kset); 1827 xfs_sysctl_unregister(); 1828 xfs_cleanup_procfs(); 1829 xfs_buf_terminate(); 1830 xfs_mru_cache_uninit(); 1831 xfs_destroy_workqueues(); 1832 xfs_destroy_zones(); 1833 } 1834 1835 module_init(init_xfs_fs); 1836 module_exit(exit_xfs_fs); 1837 1838 MODULE_AUTHOR("Silicon Graphics, Inc."); 1839 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1840 MODULE_LICENSE("GPL"); 1841