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 #include "xfs_ondisk.h" 49 50 #include <linux/namei.h> 51 #include <linux/init.h> 52 #include <linux/slab.h> 53 #include <linux/mount.h> 54 #include <linux/mempool.h> 55 #include <linux/writeback.h> 56 #include <linux/kthread.h> 57 #include <linux/freezer.h> 58 #include <linux/parser.h> 59 60 static const struct super_operations xfs_super_operations; 61 struct bio_set *xfs_ioend_bioset; 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 /* 69 * Table driven mount option parser. 70 */ 71 enum { 72 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_biosize, 73 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid, 74 Opt_mtpt, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups, 75 Opt_allocsize, Opt_norecovery, Opt_barrier, Opt_nobarrier, 76 Opt_inode64, Opt_inode32, Opt_ikeep, Opt_noikeep, 77 Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, Opt_filestreams, 78 Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota, 79 Opt_uquota, Opt_gquota, Opt_pquota, 80 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, 81 Opt_discard, Opt_nodiscard, Opt_dax, Opt_err, 82 }; 83 84 static const match_table_t tokens = { 85 {Opt_logbufs, "logbufs=%u"}, /* number of XFS log buffers */ 86 {Opt_logbsize, "logbsize=%s"}, /* size of XFS log buffers */ 87 {Opt_logdev, "logdev=%s"}, /* log device */ 88 {Opt_rtdev, "rtdev=%s"}, /* realtime I/O device */ 89 {Opt_biosize, "biosize=%u"}, /* log2 of preferred buffered io size */ 90 {Opt_wsync, "wsync"}, /* safe-mode nfs compatible mount */ 91 {Opt_noalign, "noalign"}, /* turn off stripe alignment */ 92 {Opt_swalloc, "swalloc"}, /* turn on stripe width allocation */ 93 {Opt_sunit, "sunit=%u"}, /* data volume stripe unit */ 94 {Opt_swidth, "swidth=%u"}, /* data volume stripe width */ 95 {Opt_nouuid, "nouuid"}, /* ignore filesystem UUID */ 96 {Opt_mtpt, "mtpt"}, /* filesystem mount point */ 97 {Opt_grpid, "grpid"}, /* group-ID from parent directory */ 98 {Opt_nogrpid, "nogrpid"}, /* group-ID from current process */ 99 {Opt_bsdgroups, "bsdgroups"}, /* group-ID from parent directory */ 100 {Opt_sysvgroups,"sysvgroups"}, /* group-ID from current process */ 101 {Opt_allocsize, "allocsize=%s"},/* preferred allocation size */ 102 {Opt_norecovery,"norecovery"}, /* don't run XFS recovery */ 103 {Opt_barrier, "barrier"}, /* use writer barriers for log write and 104 * unwritten extent conversion */ 105 {Opt_nobarrier, "nobarrier"}, /* .. disable */ 106 {Opt_inode64, "inode64"}, /* inodes can be allocated anywhere */ 107 {Opt_inode32, "inode32"}, /* inode allocation limited to 108 * XFS_MAXINUMBER_32 */ 109 {Opt_ikeep, "ikeep"}, /* do not free empty inode clusters */ 110 {Opt_noikeep, "noikeep"}, /* free empty inode clusters */ 111 {Opt_largeio, "largeio"}, /* report large I/O sizes in stat() */ 112 {Opt_nolargeio, "nolargeio"}, /* do not report large I/O sizes 113 * in stat(). */ 114 {Opt_attr2, "attr2"}, /* do use attr2 attribute format */ 115 {Opt_noattr2, "noattr2"}, /* do not use attr2 attribute format */ 116 {Opt_filestreams,"filestreams"},/* use filestreams allocator */ 117 {Opt_quota, "quota"}, /* disk quotas (user) */ 118 {Opt_noquota, "noquota"}, /* no quotas */ 119 {Opt_usrquota, "usrquota"}, /* user quota enabled */ 120 {Opt_grpquota, "grpquota"}, /* group quota enabled */ 121 {Opt_prjquota, "prjquota"}, /* project quota enabled */ 122 {Opt_uquota, "uquota"}, /* user quota (IRIX variant) */ 123 {Opt_gquota, "gquota"}, /* group quota (IRIX variant) */ 124 {Opt_pquota, "pquota"}, /* project quota (IRIX variant) */ 125 {Opt_uqnoenforce,"uqnoenforce"},/* user quota limit enforcement */ 126 {Opt_gqnoenforce,"gqnoenforce"},/* group quota limit enforcement */ 127 {Opt_pqnoenforce,"pqnoenforce"},/* project quota limit enforcement */ 128 {Opt_qnoenforce, "qnoenforce"}, /* same as uqnoenforce */ 129 {Opt_discard, "discard"}, /* Discard unused blocks */ 130 {Opt_nodiscard, "nodiscard"}, /* Do not discard unused blocks */ 131 132 {Opt_dax, "dax"}, /* Enable direct access to bdev pages */ 133 {Opt_err, NULL}, 134 }; 135 136 137 STATIC int 138 suffix_kstrtoint(const substring_t *s, unsigned int base, int *res) 139 { 140 int last, shift_left_factor = 0, _res; 141 char *value; 142 int ret = 0; 143 144 value = match_strdup(s); 145 if (!value) 146 return -ENOMEM; 147 148 last = strlen(value) - 1; 149 if (value[last] == 'K' || value[last] == 'k') { 150 shift_left_factor = 10; 151 value[last] = '\0'; 152 } 153 if (value[last] == 'M' || value[last] == 'm') { 154 shift_left_factor = 20; 155 value[last] = '\0'; 156 } 157 if (value[last] == 'G' || value[last] == 'g') { 158 shift_left_factor = 30; 159 value[last] = '\0'; 160 } 161 162 if (kstrtoint(value, base, &_res)) 163 ret = -EINVAL; 164 kfree(value); 165 *res = _res << shift_left_factor; 166 return ret; 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 * *sb is const because this is also used to test options on the remount 177 * path, and we don't want this to have any side effects at remount time. 178 * Today this function does not change *sb, but just to future-proof... 179 */ 180 STATIC int 181 xfs_parseargs( 182 struct xfs_mount *mp, 183 char *options) 184 { 185 const struct super_block *sb = mp->m_super; 186 char *p; 187 substring_t args[MAX_OPT_ARGS]; 188 int dsunit = 0; 189 int dswidth = 0; 190 int iosize = 0; 191 __uint8_t iosizelog = 0; 192 193 /* 194 * set up the mount name first so all the errors will refer to the 195 * correct device. 196 */ 197 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 198 if (!mp->m_fsname) 199 return -ENOMEM; 200 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 201 202 /* 203 * Copy binary VFS mount flags we are interested in. 204 */ 205 if (sb->s_flags & MS_RDONLY) 206 mp->m_flags |= XFS_MOUNT_RDONLY; 207 if (sb->s_flags & MS_DIRSYNC) 208 mp->m_flags |= XFS_MOUNT_DIRSYNC; 209 if (sb->s_flags & MS_SYNCHRONOUS) 210 mp->m_flags |= XFS_MOUNT_WSYNC; 211 212 /* 213 * Set some default flags that could be cleared by the mount option 214 * parsing. 215 */ 216 mp->m_flags |= XFS_MOUNT_BARRIER; 217 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 218 219 /* 220 * These can be overridden by the mount option parsing. 221 */ 222 mp->m_logbufs = -1; 223 mp->m_logbsize = -1; 224 225 if (!options) 226 goto done; 227 228 while ((p = strsep(&options, ",")) != NULL) { 229 int token; 230 231 if (!*p) 232 continue; 233 234 token = match_token(p, tokens, args); 235 switch (token) { 236 case Opt_logbufs: 237 if (match_int(args, &mp->m_logbufs)) 238 return -EINVAL; 239 break; 240 case Opt_logbsize: 241 if (suffix_kstrtoint(args, 10, &mp->m_logbsize)) 242 return -EINVAL; 243 break; 244 case Opt_logdev: 245 mp->m_logname = match_strdup(args); 246 if (!mp->m_logname) 247 return -ENOMEM; 248 break; 249 case Opt_mtpt: 250 xfs_warn(mp, "%s option not allowed on this system", p); 251 return -EINVAL; 252 case Opt_rtdev: 253 mp->m_rtname = match_strdup(args); 254 if (!mp->m_rtname) 255 return -ENOMEM; 256 break; 257 case Opt_allocsize: 258 case Opt_biosize: 259 if (suffix_kstrtoint(args, 10, &iosize)) 260 return -EINVAL; 261 iosizelog = ffs(iosize) - 1; 262 break; 263 case Opt_grpid: 264 case Opt_bsdgroups: 265 mp->m_flags |= XFS_MOUNT_GRPID; 266 break; 267 case Opt_nogrpid: 268 case Opt_sysvgroups: 269 mp->m_flags &= ~XFS_MOUNT_GRPID; 270 break; 271 case Opt_wsync: 272 mp->m_flags |= XFS_MOUNT_WSYNC; 273 break; 274 case Opt_norecovery: 275 mp->m_flags |= XFS_MOUNT_NORECOVERY; 276 break; 277 case Opt_noalign: 278 mp->m_flags |= XFS_MOUNT_NOALIGN; 279 break; 280 case Opt_swalloc: 281 mp->m_flags |= XFS_MOUNT_SWALLOC; 282 break; 283 case Opt_sunit: 284 if (match_int(args, &dsunit)) 285 return -EINVAL; 286 break; 287 case Opt_swidth: 288 if (match_int(args, &dswidth)) 289 return -EINVAL; 290 break; 291 case Opt_inode32: 292 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 293 break; 294 case Opt_inode64: 295 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 296 break; 297 case Opt_nouuid: 298 mp->m_flags |= XFS_MOUNT_NOUUID; 299 break; 300 case Opt_barrier: 301 mp->m_flags |= XFS_MOUNT_BARRIER; 302 break; 303 case Opt_nobarrier: 304 mp->m_flags &= ~XFS_MOUNT_BARRIER; 305 break; 306 case Opt_ikeep: 307 mp->m_flags |= XFS_MOUNT_IKEEP; 308 break; 309 case Opt_noikeep: 310 mp->m_flags &= ~XFS_MOUNT_IKEEP; 311 break; 312 case Opt_largeio: 313 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 314 break; 315 case Opt_nolargeio: 316 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 317 break; 318 case Opt_attr2: 319 mp->m_flags |= XFS_MOUNT_ATTR2; 320 break; 321 case Opt_noattr2: 322 mp->m_flags &= ~XFS_MOUNT_ATTR2; 323 mp->m_flags |= XFS_MOUNT_NOATTR2; 324 break; 325 case Opt_filestreams: 326 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 327 break; 328 case Opt_noquota: 329 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 330 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 331 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 332 break; 333 case Opt_quota: 334 case Opt_uquota: 335 case Opt_usrquota: 336 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 337 XFS_UQUOTA_ENFD); 338 break; 339 case Opt_qnoenforce: 340 case Opt_uqnoenforce: 341 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 342 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 343 break; 344 case Opt_pquota: 345 case Opt_prjquota: 346 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 347 XFS_PQUOTA_ENFD); 348 break; 349 case Opt_pqnoenforce: 350 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 351 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 352 break; 353 case Opt_gquota: 354 case Opt_grpquota: 355 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 356 XFS_GQUOTA_ENFD); 357 break; 358 case Opt_gqnoenforce: 359 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 360 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 361 break; 362 case Opt_discard: 363 mp->m_flags |= XFS_MOUNT_DISCARD; 364 break; 365 case Opt_nodiscard: 366 mp->m_flags &= ~XFS_MOUNT_DISCARD; 367 break; 368 #ifdef CONFIG_FS_DAX 369 case Opt_dax: 370 mp->m_flags |= XFS_MOUNT_DAX; 371 break; 372 #endif 373 default: 374 xfs_warn(mp, "unknown mount option [%s].", p); 375 return -EINVAL; 376 } 377 } 378 379 /* 380 * no recovery flag requires a read-only mount 381 */ 382 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 383 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 384 xfs_warn(mp, "no-recovery mounts must be read-only."); 385 return -EINVAL; 386 } 387 388 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 389 xfs_warn(mp, 390 "sunit and swidth options incompatible with the noalign option"); 391 return -EINVAL; 392 } 393 394 #ifndef CONFIG_XFS_QUOTA 395 if (XFS_IS_QUOTA_RUNNING(mp)) { 396 xfs_warn(mp, "quota support not available in this kernel."); 397 return -EINVAL; 398 } 399 #endif 400 401 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 402 xfs_warn(mp, "sunit and swidth must be specified together"); 403 return -EINVAL; 404 } 405 406 if (dsunit && (dswidth % dsunit != 0)) { 407 xfs_warn(mp, 408 "stripe width (%d) must be a multiple of the stripe unit (%d)", 409 dswidth, dsunit); 410 return -EINVAL; 411 } 412 413 done: 414 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { 415 /* 416 * At this point the superblock has not been read 417 * in, therefore we do not know the block size. 418 * Before the mount call ends we will convert 419 * these to FSBs. 420 */ 421 mp->m_dalign = dsunit; 422 mp->m_swidth = dswidth; 423 } 424 425 if (mp->m_logbufs != -1 && 426 mp->m_logbufs != 0 && 427 (mp->m_logbufs < XLOG_MIN_ICLOGS || 428 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 429 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 430 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 431 return -EINVAL; 432 } 433 if (mp->m_logbsize != -1 && 434 mp->m_logbsize != 0 && 435 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 436 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 437 !is_power_of_2(mp->m_logbsize))) { 438 xfs_warn(mp, 439 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 440 mp->m_logbsize); 441 return -EINVAL; 442 } 443 444 if (iosizelog) { 445 if (iosizelog > XFS_MAX_IO_LOG || 446 iosizelog < XFS_MIN_IO_LOG) { 447 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 448 iosizelog, XFS_MIN_IO_LOG, 449 XFS_MAX_IO_LOG); 450 return -EINVAL; 451 } 452 453 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 454 mp->m_readio_log = iosizelog; 455 mp->m_writeio_log = iosizelog; 456 } 457 458 return 0; 459 } 460 461 struct proc_xfs_info { 462 uint64_t flag; 463 char *str; 464 }; 465 466 STATIC int 467 xfs_showargs( 468 struct xfs_mount *mp, 469 struct seq_file *m) 470 { 471 static struct proc_xfs_info xfs_info_set[] = { 472 /* the few simple ones we can get from the mount struct */ 473 { XFS_MOUNT_IKEEP, ",ikeep" }, 474 { XFS_MOUNT_WSYNC, ",wsync" }, 475 { XFS_MOUNT_NOALIGN, ",noalign" }, 476 { XFS_MOUNT_SWALLOC, ",swalloc" }, 477 { XFS_MOUNT_NOUUID, ",nouuid" }, 478 { XFS_MOUNT_NORECOVERY, ",norecovery" }, 479 { XFS_MOUNT_ATTR2, ",attr2" }, 480 { XFS_MOUNT_FILESTREAMS, ",filestreams" }, 481 { XFS_MOUNT_GRPID, ",grpid" }, 482 { XFS_MOUNT_DISCARD, ",discard" }, 483 { XFS_MOUNT_SMALL_INUMS, ",inode32" }, 484 { XFS_MOUNT_DAX, ",dax" }, 485 { 0, NULL } 486 }; 487 static struct proc_xfs_info xfs_info_unset[] = { 488 /* the few simple ones we can get from the mount struct */ 489 { XFS_MOUNT_COMPAT_IOSIZE, ",largeio" }, 490 { XFS_MOUNT_BARRIER, ",nobarrier" }, 491 { XFS_MOUNT_SMALL_INUMS, ",inode64" }, 492 { 0, NULL } 493 }; 494 struct proc_xfs_info *xfs_infop; 495 496 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 497 if (mp->m_flags & xfs_infop->flag) 498 seq_puts(m, xfs_infop->str); 499 } 500 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 501 if (!(mp->m_flags & xfs_infop->flag)) 502 seq_puts(m, xfs_infop->str); 503 } 504 505 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 506 seq_printf(m, ",allocsize=%dk", 507 (int)(1 << mp->m_writeio_log) >> 10); 508 509 if (mp->m_logbufs > 0) 510 seq_printf(m, ",logbufs=%d", mp->m_logbufs); 511 if (mp->m_logbsize > 0) 512 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10); 513 514 if (mp->m_logname) 515 seq_show_option(m, "logdev", mp->m_logname); 516 if (mp->m_rtname) 517 seq_show_option(m, "rtdev", mp->m_rtname); 518 519 if (mp->m_dalign > 0) 520 seq_printf(m, ",sunit=%d", 521 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 522 if (mp->m_swidth > 0) 523 seq_printf(m, ",swidth=%d", 524 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 525 526 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 527 seq_puts(m, ",usrquota"); 528 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 529 seq_puts(m, ",uqnoenforce"); 530 531 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 532 if (mp->m_qflags & XFS_PQUOTA_ENFD) 533 seq_puts(m, ",prjquota"); 534 else 535 seq_puts(m, ",pqnoenforce"); 536 } 537 if (mp->m_qflags & XFS_GQUOTA_ACCT) { 538 if (mp->m_qflags & XFS_GQUOTA_ENFD) 539 seq_puts(m, ",grpquota"); 540 else 541 seq_puts(m, ",gqnoenforce"); 542 } 543 544 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 545 seq_puts(m, ",noquota"); 546 547 return 0; 548 } 549 __uint64_t 550 xfs_max_file_offset( 551 unsigned int blockshift) 552 { 553 unsigned int pagefactor = 1; 554 unsigned int bitshift = BITS_PER_LONG - 1; 555 556 /* Figure out maximum filesize, on Linux this can depend on 557 * the filesystem blocksize (on 32 bit platforms). 558 * __block_write_begin does this in an [unsigned] long... 559 * page->index << (PAGE_SHIFT - bbits) 560 * So, for page sized blocks (4K on 32 bit platforms), 561 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 562 * (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1) 563 * but for smaller blocksizes it is less (bbits = log2 bsize). 564 * Note1: get_block_t takes a long (implicit cast from above) 565 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 566 * can optionally convert the [unsigned] long from above into 567 * an [unsigned] long long. 568 */ 569 570 #if BITS_PER_LONG == 32 571 # if defined(CONFIG_LBDAF) 572 ASSERT(sizeof(sector_t) == 8); 573 pagefactor = PAGE_SIZE; 574 bitshift = BITS_PER_LONG; 575 # else 576 pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift); 577 # endif 578 #endif 579 580 return (((__uint64_t)pagefactor) << bitshift) - 1; 581 } 582 583 /* 584 * Set parameters for inode allocation heuristics, taking into account 585 * filesystem size and inode32/inode64 mount options; i.e. specifically 586 * whether or not XFS_MOUNT_SMALL_INUMS is set. 587 * 588 * Inode allocation patterns are altered only if inode32 is requested 589 * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large. 590 * If altered, XFS_MOUNT_32BITINODES is set as well. 591 * 592 * An agcount independent of that in the mount structure is provided 593 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated 594 * to the potentially higher ag count. 595 * 596 * Returns the maximum AG index which may contain inodes. 597 */ 598 xfs_agnumber_t 599 xfs_set_inode_alloc( 600 struct xfs_mount *mp, 601 xfs_agnumber_t agcount) 602 { 603 xfs_agnumber_t index; 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; 609 610 /* 611 * Calculate how much should be reserved for inodes to meet 612 * the max inode percentage. Used only for inode32. 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 /* Get the last possible inode in the filesystem */ 627 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); 628 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); 629 630 /* 631 * If user asked for no more than 32-bit inodes, and the fs is 632 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter 633 * the allocator to accommodate the request. 634 */ 635 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32) 636 mp->m_flags |= XFS_MOUNT_32BITINODES; 637 else 638 mp->m_flags &= ~XFS_MOUNT_32BITINODES; 639 640 for (index = 0; index < agcount; index++) { 641 struct xfs_perag *pag; 642 643 ino = XFS_AGINO_TO_INO(mp, index, agino); 644 645 pag = xfs_perag_get(mp, index); 646 647 if (mp->m_flags & XFS_MOUNT_32BITINODES) { 648 if (ino > XFS_MAXINUMBER_32) { 649 pag->pagi_inodeok = 0; 650 pag->pagf_metadata = 0; 651 } else { 652 pag->pagi_inodeok = 1; 653 maxagi++; 654 if (index < max_metadata) 655 pag->pagf_metadata = 1; 656 else 657 pag->pagf_metadata = 0; 658 } 659 } else { 660 pag->pagi_inodeok = 1; 661 pag->pagf_metadata = 0; 662 } 663 664 xfs_perag_put(pag); 665 } 666 667 return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount; 668 } 669 670 STATIC int 671 xfs_blkdev_get( 672 xfs_mount_t *mp, 673 const char *name, 674 struct block_device **bdevp) 675 { 676 int error = 0; 677 678 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 679 mp); 680 if (IS_ERR(*bdevp)) { 681 error = PTR_ERR(*bdevp); 682 xfs_warn(mp, "Invalid device [%s], error=%d", name, error); 683 } 684 685 return error; 686 } 687 688 STATIC void 689 xfs_blkdev_put( 690 struct block_device *bdev) 691 { 692 if (bdev) 693 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 694 } 695 696 void 697 xfs_blkdev_issue_flush( 698 xfs_buftarg_t *buftarg) 699 { 700 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 701 } 702 703 STATIC void 704 xfs_close_devices( 705 struct xfs_mount *mp) 706 { 707 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 708 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 709 xfs_free_buftarg(mp, mp->m_logdev_targp); 710 xfs_blkdev_put(logdev); 711 } 712 if (mp->m_rtdev_targp) { 713 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 714 xfs_free_buftarg(mp, mp->m_rtdev_targp); 715 xfs_blkdev_put(rtdev); 716 } 717 xfs_free_buftarg(mp, mp->m_ddev_targp); 718 } 719 720 /* 721 * The file system configurations are: 722 * (1) device (partition) with data and internal log 723 * (2) logical volume with data and log subvolumes. 724 * (3) logical volume with data, log, and realtime subvolumes. 725 * 726 * We only have to handle opening the log and realtime volumes here if 727 * they are present. The data subvolume has already been opened by 728 * get_sb_bdev() and is stored in sb->s_bdev. 729 */ 730 STATIC int 731 xfs_open_devices( 732 struct xfs_mount *mp) 733 { 734 struct block_device *ddev = mp->m_super->s_bdev; 735 struct block_device *logdev = NULL, *rtdev = NULL; 736 int error; 737 738 /* 739 * Open real time and log devices - order is important. 740 */ 741 if (mp->m_logname) { 742 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 743 if (error) 744 goto out; 745 } 746 747 if (mp->m_rtname) { 748 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 749 if (error) 750 goto out_close_logdev; 751 752 if (rtdev == ddev || rtdev == logdev) { 753 xfs_warn(mp, 754 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 755 error = -EINVAL; 756 goto out_close_rtdev; 757 } 758 } 759 760 /* 761 * Setup xfs_mount buffer target pointers 762 */ 763 error = -ENOMEM; 764 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev); 765 if (!mp->m_ddev_targp) 766 goto out_close_rtdev; 767 768 if (rtdev) { 769 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev); 770 if (!mp->m_rtdev_targp) 771 goto out_free_ddev_targ; 772 } 773 774 if (logdev && logdev != ddev) { 775 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev); 776 if (!mp->m_logdev_targp) 777 goto out_free_rtdev_targ; 778 } else { 779 mp->m_logdev_targp = mp->m_ddev_targp; 780 } 781 782 return 0; 783 784 out_free_rtdev_targ: 785 if (mp->m_rtdev_targp) 786 xfs_free_buftarg(mp, mp->m_rtdev_targp); 787 out_free_ddev_targ: 788 xfs_free_buftarg(mp, mp->m_ddev_targp); 789 out_close_rtdev: 790 xfs_blkdev_put(rtdev); 791 out_close_logdev: 792 if (logdev && logdev != ddev) 793 xfs_blkdev_put(logdev); 794 out: 795 return error; 796 } 797 798 /* 799 * Setup xfs_mount buffer target pointers based on superblock 800 */ 801 STATIC int 802 xfs_setup_devices( 803 struct xfs_mount *mp) 804 { 805 int error; 806 807 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); 808 if (error) 809 return error; 810 811 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 812 unsigned int log_sector_size = BBSIZE; 813 814 if (xfs_sb_version_hassector(&mp->m_sb)) 815 log_sector_size = mp->m_sb.sb_logsectsize; 816 error = xfs_setsize_buftarg(mp->m_logdev_targp, 817 log_sector_size); 818 if (error) 819 return error; 820 } 821 if (mp->m_rtdev_targp) { 822 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 823 mp->m_sb.sb_sectsize); 824 if (error) 825 return error; 826 } 827 828 return 0; 829 } 830 831 STATIC int 832 xfs_init_mount_workqueues( 833 struct xfs_mount *mp) 834 { 835 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s", 836 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname); 837 if (!mp->m_buf_workqueue) 838 goto out; 839 840 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 841 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 842 if (!mp->m_data_workqueue) 843 goto out_destroy_buf; 844 845 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 846 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 847 if (!mp->m_unwritten_workqueue) 848 goto out_destroy_data_iodone_queue; 849 850 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 851 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 852 if (!mp->m_cil_workqueue) 853 goto out_destroy_unwritten; 854 855 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 856 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 857 if (!mp->m_reclaim_workqueue) 858 goto out_destroy_cil; 859 860 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", 861 WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0, 862 mp->m_fsname); 863 if (!mp->m_log_workqueue) 864 goto out_destroy_reclaim; 865 866 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", 867 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 868 if (!mp->m_eofblocks_workqueue) 869 goto out_destroy_log; 870 871 return 0; 872 873 out_destroy_log: 874 destroy_workqueue(mp->m_log_workqueue); 875 out_destroy_reclaim: 876 destroy_workqueue(mp->m_reclaim_workqueue); 877 out_destroy_cil: 878 destroy_workqueue(mp->m_cil_workqueue); 879 out_destroy_unwritten: 880 destroy_workqueue(mp->m_unwritten_workqueue); 881 out_destroy_data_iodone_queue: 882 destroy_workqueue(mp->m_data_workqueue); 883 out_destroy_buf: 884 destroy_workqueue(mp->m_buf_workqueue); 885 out: 886 return -ENOMEM; 887 } 888 889 STATIC void 890 xfs_destroy_mount_workqueues( 891 struct xfs_mount *mp) 892 { 893 destroy_workqueue(mp->m_eofblocks_workqueue); 894 destroy_workqueue(mp->m_log_workqueue); 895 destroy_workqueue(mp->m_reclaim_workqueue); 896 destroy_workqueue(mp->m_cil_workqueue); 897 destroy_workqueue(mp->m_data_workqueue); 898 destroy_workqueue(mp->m_unwritten_workqueue); 899 destroy_workqueue(mp->m_buf_workqueue); 900 } 901 902 /* 903 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 904 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 905 * for IO to complete so that we effectively throttle multiple callers to the 906 * rate at which IO is completing. 907 */ 908 void 909 xfs_flush_inodes( 910 struct xfs_mount *mp) 911 { 912 struct super_block *sb = mp->m_super; 913 914 if (down_read_trylock(&sb->s_umount)) { 915 sync_inodes_sb(sb); 916 up_read(&sb->s_umount); 917 } 918 } 919 920 /* Catch misguided souls that try to use this interface on XFS */ 921 STATIC struct inode * 922 xfs_fs_alloc_inode( 923 struct super_block *sb) 924 { 925 BUG(); 926 return NULL; 927 } 928 929 /* 930 * Now that the generic code is guaranteed not to be accessing 931 * the linux inode, we can inactivate and reclaim the inode. 932 */ 933 STATIC void 934 xfs_fs_destroy_inode( 935 struct inode *inode) 936 { 937 struct xfs_inode *ip = XFS_I(inode); 938 939 trace_xfs_destroy_inode(ip); 940 941 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 942 XFS_STATS_INC(ip->i_mount, vn_rele); 943 XFS_STATS_INC(ip->i_mount, vn_remove); 944 945 xfs_inactive(ip); 946 947 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 948 XFS_STATS_INC(ip->i_mount, vn_reclaim); 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_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 990 "xfsino", ip->i_ino); 991 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 992 "xfsino", ip->i_ino); 993 } 994 995 /* 996 * We do an unlocked check for XFS_IDONTCACHE here because we are already 997 * serialised against cache hits here via the inode->i_lock and igrab() in 998 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 999 * racing with us, and it avoids needing to grab a spinlock here for every inode 1000 * we drop the final reference on. 1001 */ 1002 STATIC int 1003 xfs_fs_drop_inode( 1004 struct inode *inode) 1005 { 1006 struct xfs_inode *ip = XFS_I(inode); 1007 1008 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 1009 } 1010 1011 STATIC void 1012 xfs_free_fsname( 1013 struct xfs_mount *mp) 1014 { 1015 kfree(mp->m_fsname); 1016 kfree(mp->m_rtname); 1017 kfree(mp->m_logname); 1018 } 1019 1020 STATIC int 1021 xfs_fs_sync_fs( 1022 struct super_block *sb, 1023 int wait) 1024 { 1025 struct xfs_mount *mp = XFS_M(sb); 1026 1027 /* 1028 * Doing anything during the async pass would be counterproductive. 1029 */ 1030 if (!wait) 1031 return 0; 1032 1033 xfs_log_force(mp, XFS_LOG_SYNC); 1034 if (laptop_mode) { 1035 /* 1036 * The disk must be active because we're syncing. 1037 * We schedule log work now (now that the disk is 1038 * active) instead of later (when it might not be). 1039 */ 1040 flush_delayed_work(&mp->m_log->l_work); 1041 } 1042 1043 return 0; 1044 } 1045 1046 STATIC int 1047 xfs_fs_statfs( 1048 struct dentry *dentry, 1049 struct kstatfs *statp) 1050 { 1051 struct xfs_mount *mp = XFS_M(dentry->d_sb); 1052 xfs_sb_t *sbp = &mp->m_sb; 1053 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1054 __uint64_t fakeinos, id; 1055 __uint64_t icount; 1056 __uint64_t ifree; 1057 __uint64_t fdblocks; 1058 xfs_extlen_t lsize; 1059 __int64_t ffree; 1060 1061 statp->f_type = XFS_SB_MAGIC; 1062 statp->f_namelen = MAXNAMELEN - 1; 1063 1064 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 1065 statp->f_fsid.val[0] = (u32)id; 1066 statp->f_fsid.val[1] = (u32)(id >> 32); 1067 1068 icount = percpu_counter_sum(&mp->m_icount); 1069 ifree = percpu_counter_sum(&mp->m_ifree); 1070 fdblocks = percpu_counter_sum(&mp->m_fdblocks); 1071 1072 spin_lock(&mp->m_sb_lock); 1073 statp->f_bsize = sbp->sb_blocksize; 1074 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 1075 statp->f_blocks = sbp->sb_dblocks - lsize; 1076 spin_unlock(&mp->m_sb_lock); 1077 1078 statp->f_bfree = fdblocks - XFS_ALLOC_SET_ASIDE(mp); 1079 statp->f_bavail = statp->f_bfree; 1080 1081 fakeinos = statp->f_bfree << sbp->sb_inopblog; 1082 statp->f_files = MIN(icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 1083 if (mp->m_maxicount) 1084 statp->f_files = min_t(typeof(statp->f_files), 1085 statp->f_files, 1086 mp->m_maxicount); 1087 1088 /* If sb_icount overshot maxicount, report actual allocation */ 1089 statp->f_files = max_t(typeof(statp->f_files), 1090 statp->f_files, 1091 sbp->sb_icount); 1092 1093 /* make sure statp->f_ffree does not underflow */ 1094 ffree = statp->f_files - (icount - ifree); 1095 statp->f_ffree = max_t(__int64_t, ffree, 0); 1096 1097 1098 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1099 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 1100 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 1101 xfs_qm_statvfs(ip, statp); 1102 return 0; 1103 } 1104 1105 STATIC void 1106 xfs_save_resvblks(struct xfs_mount *mp) 1107 { 1108 __uint64_t resblks = 0; 1109 1110 mp->m_resblks_save = mp->m_resblks; 1111 xfs_reserve_blocks(mp, &resblks, NULL); 1112 } 1113 1114 STATIC void 1115 xfs_restore_resvblks(struct xfs_mount *mp) 1116 { 1117 __uint64_t resblks; 1118 1119 if (mp->m_resblks_save) { 1120 resblks = mp->m_resblks_save; 1121 mp->m_resblks_save = 0; 1122 } else 1123 resblks = xfs_default_resblks(mp); 1124 1125 xfs_reserve_blocks(mp, &resblks, NULL); 1126 } 1127 1128 /* 1129 * Trigger writeback of all the dirty metadata in the file system. 1130 * 1131 * This ensures that the metadata is written to their location on disk rather 1132 * than just existing in transactions in the log. This means after a quiesce 1133 * there is no log replay required to write the inodes to disk - this is the 1134 * primary difference between a sync and a quiesce. 1135 * 1136 * Note: xfs_log_quiesce() stops background log work - the callers must ensure 1137 * it is started again when appropriate. 1138 */ 1139 static void 1140 xfs_quiesce_attr( 1141 struct xfs_mount *mp) 1142 { 1143 int error = 0; 1144 1145 /* wait for all modifications to complete */ 1146 while (atomic_read(&mp->m_active_trans) > 0) 1147 delay(100); 1148 1149 /* force the log to unpin objects from the now complete transactions */ 1150 xfs_log_force(mp, XFS_LOG_SYNC); 1151 1152 /* reclaim inodes to do any IO before the freeze completes */ 1153 xfs_reclaim_inodes(mp, 0); 1154 xfs_reclaim_inodes(mp, SYNC_WAIT); 1155 1156 /* Push the superblock and write an unmount record */ 1157 error = xfs_log_sbcount(mp); 1158 if (error) 1159 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " 1160 "Frozen image may not be consistent."); 1161 /* 1162 * Just warn here till VFS can correctly support 1163 * read-only remount without racing. 1164 */ 1165 WARN_ON(atomic_read(&mp->m_active_trans) != 0); 1166 1167 xfs_log_quiesce(mp); 1168 } 1169 1170 STATIC int 1171 xfs_test_remount_options( 1172 struct super_block *sb, 1173 struct xfs_mount *mp, 1174 char *options) 1175 { 1176 int error = 0; 1177 struct xfs_mount *tmp_mp; 1178 1179 tmp_mp = kmem_zalloc(sizeof(*tmp_mp), KM_MAYFAIL); 1180 if (!tmp_mp) 1181 return -ENOMEM; 1182 1183 tmp_mp->m_super = sb; 1184 error = xfs_parseargs(tmp_mp, options); 1185 xfs_free_fsname(tmp_mp); 1186 kfree(tmp_mp); 1187 1188 return error; 1189 } 1190 1191 STATIC int 1192 xfs_fs_remount( 1193 struct super_block *sb, 1194 int *flags, 1195 char *options) 1196 { 1197 struct xfs_mount *mp = XFS_M(sb); 1198 xfs_sb_t *sbp = &mp->m_sb; 1199 substring_t args[MAX_OPT_ARGS]; 1200 char *p; 1201 int error; 1202 1203 /* First, check for complete junk; i.e. invalid options */ 1204 error = xfs_test_remount_options(sb, mp, options); 1205 if (error) 1206 return error; 1207 1208 sync_filesystem(sb); 1209 while ((p = strsep(&options, ",")) != NULL) { 1210 int token; 1211 1212 if (!*p) 1213 continue; 1214 1215 token = match_token(p, tokens, args); 1216 switch (token) { 1217 case Opt_barrier: 1218 mp->m_flags |= XFS_MOUNT_BARRIER; 1219 break; 1220 case Opt_nobarrier: 1221 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1222 break; 1223 case Opt_inode64: 1224 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 1225 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount); 1226 break; 1227 case Opt_inode32: 1228 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 1229 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount); 1230 break; 1231 default: 1232 /* 1233 * Logically we would return an error here to prevent 1234 * users from believing they might have changed 1235 * mount options using remount which can't be changed. 1236 * 1237 * But unfortunately mount(8) adds all options from 1238 * mtab and fstab to the mount arguments in some cases 1239 * so we can't blindly reject options, but have to 1240 * check for each specified option if it actually 1241 * differs from the currently set option and only 1242 * reject it if that's the case. 1243 * 1244 * Until that is implemented we return success for 1245 * every remount request, and silently ignore all 1246 * options that we can't actually change. 1247 */ 1248 #if 0 1249 xfs_info(mp, 1250 "mount option \"%s\" not supported for remount", p); 1251 return -EINVAL; 1252 #else 1253 break; 1254 #endif 1255 } 1256 } 1257 1258 /* ro -> rw */ 1259 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1260 if (mp->m_flags & XFS_MOUNT_NORECOVERY) { 1261 xfs_warn(mp, 1262 "ro->rw transition prohibited on norecovery mount"); 1263 return -EINVAL; 1264 } 1265 1266 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && 1267 xfs_sb_has_ro_compat_feature(sbp, 1268 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 1269 xfs_warn(mp, 1270 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem", 1271 (sbp->sb_features_ro_compat & 1272 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 1273 return -EINVAL; 1274 } 1275 1276 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1277 1278 /* 1279 * If this is the first remount to writeable state we 1280 * might have some superblock changes to update. 1281 */ 1282 if (mp->m_update_sb) { 1283 error = xfs_sync_sb(mp, false); 1284 if (error) { 1285 xfs_warn(mp, "failed to write sb changes"); 1286 return error; 1287 } 1288 mp->m_update_sb = false; 1289 } 1290 1291 /* 1292 * Fill out the reserve pool if it is empty. Use the stashed 1293 * value if it is non-zero, otherwise go with the default. 1294 */ 1295 xfs_restore_resvblks(mp); 1296 xfs_log_work_queue(mp); 1297 } 1298 1299 /* rw -> ro */ 1300 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1301 /* 1302 * Before we sync the metadata, we need to free up the reserve 1303 * block pool so that the used block count in the superblock on 1304 * disk is correct at the end of the remount. Stash the current 1305 * reserve pool size so that if we get remounted rw, we can 1306 * return it to the same size. 1307 */ 1308 xfs_save_resvblks(mp); 1309 xfs_quiesce_attr(mp); 1310 mp->m_flags |= XFS_MOUNT_RDONLY; 1311 } 1312 1313 return 0; 1314 } 1315 1316 /* 1317 * Second stage of a freeze. The data is already frozen so we only 1318 * need to take care of the metadata. Once that's done sync the superblock 1319 * to the log to dirty it in case of a crash while frozen. This ensures that we 1320 * will recover the unlinked inode lists on the next mount. 1321 */ 1322 STATIC int 1323 xfs_fs_freeze( 1324 struct super_block *sb) 1325 { 1326 struct xfs_mount *mp = XFS_M(sb); 1327 1328 xfs_save_resvblks(mp); 1329 xfs_quiesce_attr(mp); 1330 return xfs_sync_sb(mp, true); 1331 } 1332 1333 STATIC int 1334 xfs_fs_unfreeze( 1335 struct super_block *sb) 1336 { 1337 struct xfs_mount *mp = XFS_M(sb); 1338 1339 xfs_restore_resvblks(mp); 1340 xfs_log_work_queue(mp); 1341 return 0; 1342 } 1343 1344 STATIC int 1345 xfs_fs_show_options( 1346 struct seq_file *m, 1347 struct dentry *root) 1348 { 1349 return xfs_showargs(XFS_M(root->d_sb), m); 1350 } 1351 1352 /* 1353 * This function fills in xfs_mount_t fields based on mount args. 1354 * Note: the superblock _has_ now been read in. 1355 */ 1356 STATIC int 1357 xfs_finish_flags( 1358 struct xfs_mount *mp) 1359 { 1360 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1361 1362 /* Fail a mount where the logbuf is smaller than the log stripe */ 1363 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1364 if (mp->m_logbsize <= 0 && 1365 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1366 mp->m_logbsize = mp->m_sb.sb_logsunit; 1367 } else if (mp->m_logbsize > 0 && 1368 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1369 xfs_warn(mp, 1370 "logbuf size must be greater than or equal to log stripe size"); 1371 return -EINVAL; 1372 } 1373 } else { 1374 /* Fail a mount if the logbuf is larger than 32K */ 1375 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1376 xfs_warn(mp, 1377 "logbuf size for version 1 logs must be 16K or 32K"); 1378 return -EINVAL; 1379 } 1380 } 1381 1382 /* 1383 * V5 filesystems always use attr2 format for attributes. 1384 */ 1385 if (xfs_sb_version_hascrc(&mp->m_sb) && 1386 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 1387 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " 1388 "attr2 is always enabled for V5 filesystems."); 1389 return -EINVAL; 1390 } 1391 1392 /* 1393 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1394 * told by noattr2 to turn it off 1395 */ 1396 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1397 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1398 mp->m_flags |= XFS_MOUNT_ATTR2; 1399 1400 /* 1401 * prohibit r/w mounts of read-only filesystems 1402 */ 1403 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1404 xfs_warn(mp, 1405 "cannot mount a read-only filesystem as read-write"); 1406 return -EROFS; 1407 } 1408 1409 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 1410 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && 1411 !xfs_sb_version_has_pquotino(&mp->m_sb)) { 1412 xfs_warn(mp, 1413 "Super block does not support project and group quota together"); 1414 return -EINVAL; 1415 } 1416 1417 return 0; 1418 } 1419 1420 static int 1421 xfs_init_percpu_counters( 1422 struct xfs_mount *mp) 1423 { 1424 int error; 1425 1426 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); 1427 if (error) 1428 return -ENOMEM; 1429 1430 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); 1431 if (error) 1432 goto free_icount; 1433 1434 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); 1435 if (error) 1436 goto free_ifree; 1437 1438 return 0; 1439 1440 free_ifree: 1441 percpu_counter_destroy(&mp->m_ifree); 1442 free_icount: 1443 percpu_counter_destroy(&mp->m_icount); 1444 return -ENOMEM; 1445 } 1446 1447 void 1448 xfs_reinit_percpu_counters( 1449 struct xfs_mount *mp) 1450 { 1451 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); 1452 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree); 1453 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks); 1454 } 1455 1456 static void 1457 xfs_destroy_percpu_counters( 1458 struct xfs_mount *mp) 1459 { 1460 percpu_counter_destroy(&mp->m_icount); 1461 percpu_counter_destroy(&mp->m_ifree); 1462 percpu_counter_destroy(&mp->m_fdblocks); 1463 } 1464 1465 STATIC int 1466 xfs_fs_fill_super( 1467 struct super_block *sb, 1468 void *data, 1469 int silent) 1470 { 1471 struct inode *root; 1472 struct xfs_mount *mp = NULL; 1473 int flags = 0, error = -ENOMEM; 1474 1475 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1476 if (!mp) 1477 goto out; 1478 1479 spin_lock_init(&mp->m_sb_lock); 1480 mutex_init(&mp->m_growlock); 1481 atomic_set(&mp->m_active_trans, 0); 1482 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1483 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); 1484 mp->m_kobj.kobject.kset = xfs_kset; 1485 1486 mp->m_super = sb; 1487 sb->s_fs_info = mp; 1488 1489 error = xfs_parseargs(mp, (char *)data); 1490 if (error) 1491 goto out_free_fsname; 1492 1493 sb_min_blocksize(sb, BBSIZE); 1494 sb->s_xattr = xfs_xattr_handlers; 1495 sb->s_export_op = &xfs_export_operations; 1496 #ifdef CONFIG_XFS_QUOTA 1497 sb->s_qcop = &xfs_quotactl_operations; 1498 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 1499 #endif 1500 sb->s_op = &xfs_super_operations; 1501 1502 if (silent) 1503 flags |= XFS_MFSI_QUIET; 1504 1505 error = xfs_open_devices(mp); 1506 if (error) 1507 goto out_free_fsname; 1508 1509 error = xfs_init_mount_workqueues(mp); 1510 if (error) 1511 goto out_close_devices; 1512 1513 error = xfs_init_percpu_counters(mp); 1514 if (error) 1515 goto out_destroy_workqueues; 1516 1517 /* Allocate stats memory before we do operations that might use it */ 1518 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats); 1519 if (!mp->m_stats.xs_stats) { 1520 error = -ENOMEM; 1521 goto out_destroy_counters; 1522 } 1523 1524 error = xfs_readsb(mp, flags); 1525 if (error) 1526 goto out_free_stats; 1527 1528 error = xfs_finish_flags(mp); 1529 if (error) 1530 goto out_free_sb; 1531 1532 error = xfs_setup_devices(mp); 1533 if (error) 1534 goto out_free_sb; 1535 1536 error = xfs_filestream_mount(mp); 1537 if (error) 1538 goto out_free_sb; 1539 1540 /* 1541 * we must configure the block size in the superblock before we run the 1542 * full mount process as the mount process can lookup and cache inodes. 1543 */ 1544 sb->s_magic = XFS_SB_MAGIC; 1545 sb->s_blocksize = mp->m_sb.sb_blocksize; 1546 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1547 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1548 sb->s_max_links = XFS_MAXLINK; 1549 sb->s_time_gran = 1; 1550 set_posix_acl_flag(sb); 1551 1552 /* version 5 superblocks support inode version counters. */ 1553 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1554 sb->s_flags |= MS_I_VERSION; 1555 1556 if (mp->m_flags & XFS_MOUNT_DAX) { 1557 xfs_warn(mp, 1558 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1559 1560 error = bdev_dax_supported(sb, sb->s_blocksize); 1561 if (error) { 1562 xfs_alert(mp, 1563 "DAX unsupported by block device. Turning off DAX."); 1564 mp->m_flags &= ~XFS_MOUNT_DAX; 1565 } 1566 } 1567 1568 if (xfs_sb_version_hassparseinodes(&mp->m_sb)) 1569 xfs_alert(mp, 1570 "EXPERIMENTAL sparse inode feature enabled. Use at your own risk!"); 1571 1572 error = xfs_mountfs(mp); 1573 if (error) 1574 goto out_filestream_unmount; 1575 1576 root = igrab(VFS_I(mp->m_rootip)); 1577 if (!root) { 1578 error = -ENOENT; 1579 goto out_unmount; 1580 } 1581 sb->s_root = d_make_root(root); 1582 if (!sb->s_root) { 1583 error = -ENOMEM; 1584 goto out_unmount; 1585 } 1586 1587 return 0; 1588 1589 out_filestream_unmount: 1590 xfs_filestream_unmount(mp); 1591 out_free_sb: 1592 xfs_freesb(mp); 1593 out_free_stats: 1594 free_percpu(mp->m_stats.xs_stats); 1595 out_destroy_counters: 1596 xfs_destroy_percpu_counters(mp); 1597 out_destroy_workqueues: 1598 xfs_destroy_mount_workqueues(mp); 1599 out_close_devices: 1600 xfs_close_devices(mp); 1601 out_free_fsname: 1602 xfs_free_fsname(mp); 1603 kfree(mp); 1604 out: 1605 return error; 1606 1607 out_unmount: 1608 xfs_filestream_unmount(mp); 1609 xfs_unmountfs(mp); 1610 goto out_free_sb; 1611 } 1612 1613 STATIC void 1614 xfs_fs_put_super( 1615 struct super_block *sb) 1616 { 1617 struct xfs_mount *mp = XFS_M(sb); 1618 1619 xfs_notice(mp, "Unmounting Filesystem"); 1620 xfs_filestream_unmount(mp); 1621 xfs_unmountfs(mp); 1622 1623 xfs_freesb(mp); 1624 free_percpu(mp->m_stats.xs_stats); 1625 xfs_destroy_percpu_counters(mp); 1626 xfs_destroy_mount_workqueues(mp); 1627 xfs_close_devices(mp); 1628 xfs_free_fsname(mp); 1629 kfree(mp); 1630 } 1631 1632 STATIC struct dentry * 1633 xfs_fs_mount( 1634 struct file_system_type *fs_type, 1635 int flags, 1636 const char *dev_name, 1637 void *data) 1638 { 1639 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1640 } 1641 1642 static long 1643 xfs_fs_nr_cached_objects( 1644 struct super_block *sb, 1645 struct shrink_control *sc) 1646 { 1647 return xfs_reclaim_inodes_count(XFS_M(sb)); 1648 } 1649 1650 static long 1651 xfs_fs_free_cached_objects( 1652 struct super_block *sb, 1653 struct shrink_control *sc) 1654 { 1655 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); 1656 } 1657 1658 static const struct super_operations xfs_super_operations = { 1659 .alloc_inode = xfs_fs_alloc_inode, 1660 .destroy_inode = xfs_fs_destroy_inode, 1661 .drop_inode = xfs_fs_drop_inode, 1662 .put_super = xfs_fs_put_super, 1663 .sync_fs = xfs_fs_sync_fs, 1664 .freeze_fs = xfs_fs_freeze, 1665 .unfreeze_fs = xfs_fs_unfreeze, 1666 .statfs = xfs_fs_statfs, 1667 .remount_fs = xfs_fs_remount, 1668 .show_options = xfs_fs_show_options, 1669 .nr_cached_objects = xfs_fs_nr_cached_objects, 1670 .free_cached_objects = xfs_fs_free_cached_objects, 1671 }; 1672 1673 static struct file_system_type xfs_fs_type = { 1674 .owner = THIS_MODULE, 1675 .name = "xfs", 1676 .mount = xfs_fs_mount, 1677 .kill_sb = kill_block_super, 1678 .fs_flags = FS_REQUIRES_DEV, 1679 }; 1680 MODULE_ALIAS_FS("xfs"); 1681 1682 STATIC int __init 1683 xfs_init_zones(void) 1684 { 1685 xfs_ioend_bioset = bioset_create(4 * MAX_BUF_PER_PAGE, 1686 offsetof(struct xfs_ioend, io_inline_bio)); 1687 if (!xfs_ioend_bioset) 1688 goto out; 1689 1690 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1691 "xfs_log_ticket"); 1692 if (!xfs_log_ticket_zone) 1693 goto out_free_ioend_bioset; 1694 1695 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1696 "xfs_bmap_free_item"); 1697 if (!xfs_bmap_free_item_zone) 1698 goto out_destroy_log_ticket_zone; 1699 1700 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1701 "xfs_btree_cur"); 1702 if (!xfs_btree_cur_zone) 1703 goto out_destroy_bmap_free_item_zone; 1704 1705 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1706 "xfs_da_state"); 1707 if (!xfs_da_state_zone) 1708 goto out_destroy_btree_cur_zone; 1709 1710 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1711 if (!xfs_ifork_zone) 1712 goto out_destroy_da_state_zone; 1713 1714 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1715 if (!xfs_trans_zone) 1716 goto out_destroy_ifork_zone; 1717 1718 xfs_log_item_desc_zone = 1719 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1720 "xfs_log_item_desc"); 1721 if (!xfs_log_item_desc_zone) 1722 goto out_destroy_trans_zone; 1723 1724 /* 1725 * The size of the zone allocated buf log item is the maximum 1726 * size possible under XFS. This wastes a little bit of memory, 1727 * but it is much faster. 1728 */ 1729 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1730 "xfs_buf_item"); 1731 if (!xfs_buf_item_zone) 1732 goto out_destroy_log_item_desc_zone; 1733 1734 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1735 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1736 sizeof(xfs_extent_t))), "xfs_efd_item"); 1737 if (!xfs_efd_zone) 1738 goto out_destroy_buf_item_zone; 1739 1740 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1741 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1742 sizeof(xfs_extent_t))), "xfs_efi_item"); 1743 if (!xfs_efi_zone) 1744 goto out_destroy_efd_zone; 1745 1746 xfs_inode_zone = 1747 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1748 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD | 1749 KM_ZONE_ACCOUNT, xfs_fs_inode_init_once); 1750 if (!xfs_inode_zone) 1751 goto out_destroy_efi_zone; 1752 1753 xfs_ili_zone = 1754 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1755 KM_ZONE_SPREAD, NULL); 1756 if (!xfs_ili_zone) 1757 goto out_destroy_inode_zone; 1758 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), 1759 "xfs_icr"); 1760 if (!xfs_icreate_zone) 1761 goto out_destroy_ili_zone; 1762 1763 return 0; 1764 1765 out_destroy_ili_zone: 1766 kmem_zone_destroy(xfs_ili_zone); 1767 out_destroy_inode_zone: 1768 kmem_zone_destroy(xfs_inode_zone); 1769 out_destroy_efi_zone: 1770 kmem_zone_destroy(xfs_efi_zone); 1771 out_destroy_efd_zone: 1772 kmem_zone_destroy(xfs_efd_zone); 1773 out_destroy_buf_item_zone: 1774 kmem_zone_destroy(xfs_buf_item_zone); 1775 out_destroy_log_item_desc_zone: 1776 kmem_zone_destroy(xfs_log_item_desc_zone); 1777 out_destroy_trans_zone: 1778 kmem_zone_destroy(xfs_trans_zone); 1779 out_destroy_ifork_zone: 1780 kmem_zone_destroy(xfs_ifork_zone); 1781 out_destroy_da_state_zone: 1782 kmem_zone_destroy(xfs_da_state_zone); 1783 out_destroy_btree_cur_zone: 1784 kmem_zone_destroy(xfs_btree_cur_zone); 1785 out_destroy_bmap_free_item_zone: 1786 kmem_zone_destroy(xfs_bmap_free_item_zone); 1787 out_destroy_log_ticket_zone: 1788 kmem_zone_destroy(xfs_log_ticket_zone); 1789 out_free_ioend_bioset: 1790 bioset_free(xfs_ioend_bioset); 1791 out: 1792 return -ENOMEM; 1793 } 1794 1795 STATIC void 1796 xfs_destroy_zones(void) 1797 { 1798 /* 1799 * Make sure all delayed rcu free are flushed before we 1800 * destroy caches. 1801 */ 1802 rcu_barrier(); 1803 kmem_zone_destroy(xfs_icreate_zone); 1804 kmem_zone_destroy(xfs_ili_zone); 1805 kmem_zone_destroy(xfs_inode_zone); 1806 kmem_zone_destroy(xfs_efi_zone); 1807 kmem_zone_destroy(xfs_efd_zone); 1808 kmem_zone_destroy(xfs_buf_item_zone); 1809 kmem_zone_destroy(xfs_log_item_desc_zone); 1810 kmem_zone_destroy(xfs_trans_zone); 1811 kmem_zone_destroy(xfs_ifork_zone); 1812 kmem_zone_destroy(xfs_da_state_zone); 1813 kmem_zone_destroy(xfs_btree_cur_zone); 1814 kmem_zone_destroy(xfs_bmap_free_item_zone); 1815 kmem_zone_destroy(xfs_log_ticket_zone); 1816 bioset_free(xfs_ioend_bioset); 1817 } 1818 1819 STATIC int __init 1820 xfs_init_workqueues(void) 1821 { 1822 /* 1823 * The allocation workqueue can be used in memory reclaim situations 1824 * (writepage path), and parallelism is only limited by the number of 1825 * AGs in all the filesystems mounted. Hence use the default large 1826 * max_active value for this workqueue. 1827 */ 1828 xfs_alloc_wq = alloc_workqueue("xfsalloc", 1829 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0); 1830 if (!xfs_alloc_wq) 1831 return -ENOMEM; 1832 1833 return 0; 1834 } 1835 1836 STATIC void 1837 xfs_destroy_workqueues(void) 1838 { 1839 destroy_workqueue(xfs_alloc_wq); 1840 } 1841 1842 STATIC int __init 1843 init_xfs_fs(void) 1844 { 1845 int error; 1846 1847 xfs_check_ondisk_structs(); 1848 1849 printk(KERN_INFO XFS_VERSION_STRING " with " 1850 XFS_BUILD_OPTIONS " enabled\n"); 1851 1852 xfs_dir_startup(); 1853 1854 error = xfs_init_zones(); 1855 if (error) 1856 goto out; 1857 1858 error = xfs_init_workqueues(); 1859 if (error) 1860 goto out_destroy_zones; 1861 1862 error = xfs_mru_cache_init(); 1863 if (error) 1864 goto out_destroy_wq; 1865 1866 error = xfs_buf_init(); 1867 if (error) 1868 goto out_mru_cache_uninit; 1869 1870 error = xfs_init_procfs(); 1871 if (error) 1872 goto out_buf_terminate; 1873 1874 error = xfs_sysctl_register(); 1875 if (error) 1876 goto out_cleanup_procfs; 1877 1878 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); 1879 if (!xfs_kset) { 1880 error = -ENOMEM; 1881 goto out_sysctl_unregister; 1882 } 1883 1884 xfsstats.xs_kobj.kobject.kset = xfs_kset; 1885 1886 xfsstats.xs_stats = alloc_percpu(struct xfsstats); 1887 if (!xfsstats.xs_stats) { 1888 error = -ENOMEM; 1889 goto out_kset_unregister; 1890 } 1891 1892 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL, 1893 "stats"); 1894 if (error) 1895 goto out_free_stats; 1896 1897 #ifdef DEBUG 1898 xfs_dbg_kobj.kobject.kset = xfs_kset; 1899 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug"); 1900 if (error) 1901 goto out_remove_stats_kobj; 1902 #endif 1903 1904 error = xfs_qm_init(); 1905 if (error) 1906 goto out_remove_dbg_kobj; 1907 1908 error = register_filesystem(&xfs_fs_type); 1909 if (error) 1910 goto out_qm_exit; 1911 return 0; 1912 1913 out_qm_exit: 1914 xfs_qm_exit(); 1915 out_remove_dbg_kobj: 1916 #ifdef DEBUG 1917 xfs_sysfs_del(&xfs_dbg_kobj); 1918 out_remove_stats_kobj: 1919 #endif 1920 xfs_sysfs_del(&xfsstats.xs_kobj); 1921 out_free_stats: 1922 free_percpu(xfsstats.xs_stats); 1923 out_kset_unregister: 1924 kset_unregister(xfs_kset); 1925 out_sysctl_unregister: 1926 xfs_sysctl_unregister(); 1927 out_cleanup_procfs: 1928 xfs_cleanup_procfs(); 1929 out_buf_terminate: 1930 xfs_buf_terminate(); 1931 out_mru_cache_uninit: 1932 xfs_mru_cache_uninit(); 1933 out_destroy_wq: 1934 xfs_destroy_workqueues(); 1935 out_destroy_zones: 1936 xfs_destroy_zones(); 1937 out: 1938 return error; 1939 } 1940 1941 STATIC void __exit 1942 exit_xfs_fs(void) 1943 { 1944 xfs_qm_exit(); 1945 unregister_filesystem(&xfs_fs_type); 1946 #ifdef DEBUG 1947 xfs_sysfs_del(&xfs_dbg_kobj); 1948 #endif 1949 xfs_sysfs_del(&xfsstats.xs_kobj); 1950 free_percpu(xfsstats.xs_stats); 1951 kset_unregister(xfs_kset); 1952 xfs_sysctl_unregister(); 1953 xfs_cleanup_procfs(); 1954 xfs_buf_terminate(); 1955 xfs_mru_cache_uninit(); 1956 xfs_destroy_workqueues(); 1957 xfs_destroy_zones(); 1958 xfs_uuid_table_free(); 1959 } 1960 1961 module_init(init_xfs_fs); 1962 module_exit(exit_xfs_fs); 1963 1964 MODULE_AUTHOR("Silicon Graphics, Inc."); 1965 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1966 MODULE_LICENSE("GPL"); 1967