1 /* 2 * Copyright (c) 2000-2006 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #include "xfs.h" 20 #include "xfs_log.h" 21 #include "xfs_inum.h" 22 #include "xfs_trans.h" 23 #include "xfs_sb.h" 24 #include "xfs_ag.h" 25 #include "xfs_dir2.h" 26 #include "xfs_alloc.h" 27 #include "xfs_quota.h" 28 #include "xfs_mount.h" 29 #include "xfs_bmap_btree.h" 30 #include "xfs_alloc_btree.h" 31 #include "xfs_ialloc_btree.h" 32 #include "xfs_dinode.h" 33 #include "xfs_inode.h" 34 #include "xfs_btree.h" 35 #include "xfs_ialloc.h" 36 #include "xfs_bmap.h" 37 #include "xfs_rtalloc.h" 38 #include "xfs_error.h" 39 #include "xfs_itable.h" 40 #include "xfs_fsops.h" 41 #include "xfs_attr.h" 42 #include "xfs_buf_item.h" 43 #include "xfs_utils.h" 44 #include "xfs_vnodeops.h" 45 #include "xfs_log_priv.h" 46 #include "xfs_trans_priv.h" 47 #include "xfs_filestream.h" 48 #include "xfs_da_btree.h" 49 #include "xfs_extfree_item.h" 50 #include "xfs_mru_cache.h" 51 #include "xfs_inode_item.h" 52 #include "xfs_sync.h" 53 #include "xfs_trace.h" 54 55 #include <linux/namei.h> 56 #include <linux/init.h> 57 #include <linux/slab.h> 58 #include <linux/mount.h> 59 #include <linux/mempool.h> 60 #include <linux/writeback.h> 61 #include <linux/kthread.h> 62 #include <linux/freezer.h> 63 #include <linux/parser.h> 64 65 static const struct super_operations xfs_super_operations; 66 static kmem_zone_t *xfs_ioend_zone; 67 mempool_t *xfs_ioend_pool; 68 69 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ 70 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ 71 #define MNTOPT_LOGDEV "logdev" /* log device */ 72 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ 73 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ 74 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ 75 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ 76 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ 77 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ 78 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ 79 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ 80 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ 81 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ 82 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ 83 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ 84 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ 85 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ 86 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ 87 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and 88 * unwritten extent conversion */ 89 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ 90 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ 91 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ 92 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ 93 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ 94 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes 95 * in stat(). */ 96 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ 97 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ 98 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ 99 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ 100 #define MNTOPT_NOQUOTA "noquota" /* no quotas */ 101 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ 102 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ 103 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ 104 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ 105 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ 106 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ 107 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ 108 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ 109 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ 110 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ 111 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */ 112 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */ 113 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ 114 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ 115 116 /* 117 * Table driven mount option parser. 118 * 119 * Currently only used for remount, but it will be used for mount 120 * in the future, too. 121 */ 122 enum { 123 Opt_barrier, Opt_nobarrier, Opt_err 124 }; 125 126 static const match_table_t tokens = { 127 {Opt_barrier, "barrier"}, 128 {Opt_nobarrier, "nobarrier"}, 129 {Opt_err, NULL} 130 }; 131 132 133 STATIC unsigned long 134 suffix_strtoul(char *s, char **endp, unsigned int base) 135 { 136 int last, shift_left_factor = 0; 137 char *value = s; 138 139 last = strlen(value) - 1; 140 if (value[last] == 'K' || value[last] == 'k') { 141 shift_left_factor = 10; 142 value[last] = '\0'; 143 } 144 if (value[last] == 'M' || value[last] == 'm') { 145 shift_left_factor = 20; 146 value[last] = '\0'; 147 } 148 if (value[last] == 'G' || value[last] == 'g') { 149 shift_left_factor = 30; 150 value[last] = '\0'; 151 } 152 153 return simple_strtoul((const char *)s, endp, base) << shift_left_factor; 154 } 155 156 /* 157 * This function fills in xfs_mount_t fields based on mount args. 158 * Note: the superblock has _not_ yet been read in. 159 * 160 * Note that this function leaks the various device name allocations on 161 * failure. The caller takes care of them. 162 */ 163 STATIC int 164 xfs_parseargs( 165 struct xfs_mount *mp, 166 char *options) 167 { 168 struct super_block *sb = mp->m_super; 169 char *this_char, *value, *eov; 170 int dsunit = 0; 171 int dswidth = 0; 172 int iosize = 0; 173 __uint8_t iosizelog = 0; 174 175 /* 176 * set up the mount name first so all the errors will refer to the 177 * correct device. 178 */ 179 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 180 if (!mp->m_fsname) 181 return ENOMEM; 182 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 183 184 /* 185 * Copy binary VFS mount flags we are interested in. 186 */ 187 if (sb->s_flags & MS_RDONLY) 188 mp->m_flags |= XFS_MOUNT_RDONLY; 189 if (sb->s_flags & MS_DIRSYNC) 190 mp->m_flags |= XFS_MOUNT_DIRSYNC; 191 if (sb->s_flags & MS_SYNCHRONOUS) 192 mp->m_flags |= XFS_MOUNT_WSYNC; 193 194 /* 195 * Set some default flags that could be cleared by the mount option 196 * parsing. 197 */ 198 mp->m_flags |= XFS_MOUNT_BARRIER; 199 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 200 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 201 202 /* 203 * These can be overridden by the mount option parsing. 204 */ 205 mp->m_logbufs = -1; 206 mp->m_logbsize = -1; 207 208 if (!options) 209 goto done; 210 211 while ((this_char = strsep(&options, ",")) != NULL) { 212 if (!*this_char) 213 continue; 214 if ((value = strchr(this_char, '=')) != NULL) 215 *value++ = 0; 216 217 if (!strcmp(this_char, MNTOPT_LOGBUFS)) { 218 if (!value || !*value) { 219 xfs_warn(mp, "%s option requires an argument", 220 this_char); 221 return EINVAL; 222 } 223 mp->m_logbufs = simple_strtoul(value, &eov, 10); 224 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { 225 if (!value || !*value) { 226 xfs_warn(mp, "%s option requires an argument", 227 this_char); 228 return EINVAL; 229 } 230 mp->m_logbsize = suffix_strtoul(value, &eov, 10); 231 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { 232 if (!value || !*value) { 233 xfs_warn(mp, "%s option requires an argument", 234 this_char); 235 return EINVAL; 236 } 237 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 238 if (!mp->m_logname) 239 return ENOMEM; 240 } else if (!strcmp(this_char, MNTOPT_MTPT)) { 241 xfs_warn(mp, "%s option not allowed on this system", 242 this_char); 243 return EINVAL; 244 } else if (!strcmp(this_char, MNTOPT_RTDEV)) { 245 if (!value || !*value) { 246 xfs_warn(mp, "%s option requires an argument", 247 this_char); 248 return EINVAL; 249 } 250 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 251 if (!mp->m_rtname) 252 return ENOMEM; 253 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { 254 if (!value || !*value) { 255 xfs_warn(mp, "%s option requires an argument", 256 this_char); 257 return EINVAL; 258 } 259 iosize = simple_strtoul(value, &eov, 10); 260 iosizelog = ffs(iosize) - 1; 261 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { 262 if (!value || !*value) { 263 xfs_warn(mp, "%s option requires an argument", 264 this_char); 265 return EINVAL; 266 } 267 iosize = suffix_strtoul(value, &eov, 10); 268 iosizelog = ffs(iosize) - 1; 269 } else if (!strcmp(this_char, MNTOPT_GRPID) || 270 !strcmp(this_char, MNTOPT_BSDGROUPS)) { 271 mp->m_flags |= XFS_MOUNT_GRPID; 272 } else if (!strcmp(this_char, MNTOPT_NOGRPID) || 273 !strcmp(this_char, MNTOPT_SYSVGROUPS)) { 274 mp->m_flags &= ~XFS_MOUNT_GRPID; 275 } else if (!strcmp(this_char, MNTOPT_WSYNC)) { 276 mp->m_flags |= XFS_MOUNT_WSYNC; 277 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { 278 mp->m_flags |= XFS_MOUNT_NORECOVERY; 279 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { 280 mp->m_flags |= XFS_MOUNT_NOALIGN; 281 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { 282 mp->m_flags |= XFS_MOUNT_SWALLOC; 283 } else if (!strcmp(this_char, MNTOPT_SUNIT)) { 284 if (!value || !*value) { 285 xfs_warn(mp, "%s option requires an argument", 286 this_char); 287 return EINVAL; 288 } 289 dsunit = simple_strtoul(value, &eov, 10); 290 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { 291 if (!value || !*value) { 292 xfs_warn(mp, "%s option requires an argument", 293 this_char); 294 return EINVAL; 295 } 296 dswidth = simple_strtoul(value, &eov, 10); 297 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { 298 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 299 #if !XFS_BIG_INUMS 300 xfs_warn(mp, "%s option not allowed on this system", 301 this_char); 302 return EINVAL; 303 #endif 304 } else if (!strcmp(this_char, MNTOPT_NOUUID)) { 305 mp->m_flags |= XFS_MOUNT_NOUUID; 306 } else if (!strcmp(this_char, MNTOPT_BARRIER)) { 307 mp->m_flags |= XFS_MOUNT_BARRIER; 308 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { 309 mp->m_flags &= ~XFS_MOUNT_BARRIER; 310 } else if (!strcmp(this_char, MNTOPT_IKEEP)) { 311 mp->m_flags |= XFS_MOUNT_IKEEP; 312 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { 313 mp->m_flags &= ~XFS_MOUNT_IKEEP; 314 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { 315 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 316 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { 317 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 318 } else if (!strcmp(this_char, MNTOPT_ATTR2)) { 319 mp->m_flags |= XFS_MOUNT_ATTR2; 320 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { 321 mp->m_flags &= ~XFS_MOUNT_ATTR2; 322 mp->m_flags |= XFS_MOUNT_NOATTR2; 323 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { 324 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 325 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { 326 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 327 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 328 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 329 } else if (!strcmp(this_char, MNTOPT_QUOTA) || 330 !strcmp(this_char, MNTOPT_UQUOTA) || 331 !strcmp(this_char, MNTOPT_USRQUOTA)) { 332 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 333 XFS_UQUOTA_ENFD); 334 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || 335 !strcmp(this_char, MNTOPT_UQUOTANOENF)) { 336 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 337 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 338 } else if (!strcmp(this_char, MNTOPT_PQUOTA) || 339 !strcmp(this_char, MNTOPT_PRJQUOTA)) { 340 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 341 XFS_OQUOTA_ENFD); 342 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { 343 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 344 mp->m_qflags &= ~XFS_OQUOTA_ENFD; 345 } else if (!strcmp(this_char, MNTOPT_GQUOTA) || 346 !strcmp(this_char, MNTOPT_GRPQUOTA)) { 347 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 348 XFS_OQUOTA_ENFD); 349 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { 350 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 351 mp->m_qflags &= ~XFS_OQUOTA_ENFD; 352 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { 353 xfs_warn(mp, 354 "delaylog is the default now, option is deprecated."); 355 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { 356 xfs_warn(mp, 357 "nodelaylog support has been removed, option is deprecated."); 358 } else if (!strcmp(this_char, MNTOPT_DISCARD)) { 359 mp->m_flags |= XFS_MOUNT_DISCARD; 360 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { 361 mp->m_flags &= ~XFS_MOUNT_DISCARD; 362 } else if (!strcmp(this_char, "ihashsize")) { 363 xfs_warn(mp, 364 "ihashsize no longer used, option is deprecated."); 365 } else if (!strcmp(this_char, "osyncisdsync")) { 366 xfs_warn(mp, 367 "osyncisdsync has no effect, option is deprecated."); 368 } else if (!strcmp(this_char, "osyncisosync")) { 369 xfs_warn(mp, 370 "osyncisosync has no effect, option is deprecated."); 371 } else if (!strcmp(this_char, "irixsgid")) { 372 xfs_warn(mp, 373 "irixsgid is now a sysctl(2) variable, option is deprecated."); 374 } else { 375 xfs_warn(mp, "unknown mount option [%s].", this_char); 376 return EINVAL; 377 } 378 } 379 380 /* 381 * no recovery flag requires a read-only mount 382 */ 383 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 384 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 385 xfs_warn(mp, "no-recovery mounts must be read-only."); 386 return EINVAL; 387 } 388 389 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 390 xfs_warn(mp, 391 "sunit and swidth options incompatible with the noalign option"); 392 return EINVAL; 393 } 394 395 #ifndef CONFIG_XFS_QUOTA 396 if (XFS_IS_QUOTA_RUNNING(mp)) { 397 xfs_warn(mp, "quota support not available in this kernel."); 398 return EINVAL; 399 } 400 #endif 401 402 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 403 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) { 404 xfs_warn(mp, "cannot mount with both project and group quota"); 405 return EINVAL; 406 } 407 408 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 409 xfs_warn(mp, "sunit and swidth must be specified together"); 410 return EINVAL; 411 } 412 413 if (dsunit && (dswidth % dsunit != 0)) { 414 xfs_warn(mp, 415 "stripe width (%d) must be a multiple of the stripe unit (%d)", 416 dswidth, dsunit); 417 return EINVAL; 418 } 419 420 done: 421 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) { 422 /* 423 * At this point the superblock has not been read 424 * in, therefore we do not know the block size. 425 * Before the mount call ends we will convert 426 * these to FSBs. 427 */ 428 if (dsunit) { 429 mp->m_dalign = dsunit; 430 mp->m_flags |= XFS_MOUNT_RETERR; 431 } 432 433 if (dswidth) 434 mp->m_swidth = dswidth; 435 } 436 437 if (mp->m_logbufs != -1 && 438 mp->m_logbufs != 0 && 439 (mp->m_logbufs < XLOG_MIN_ICLOGS || 440 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 441 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 442 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 443 return XFS_ERROR(EINVAL); 444 } 445 if (mp->m_logbsize != -1 && 446 mp->m_logbsize != 0 && 447 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 448 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 449 !is_power_of_2(mp->m_logbsize))) { 450 xfs_warn(mp, 451 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 452 mp->m_logbsize); 453 return XFS_ERROR(EINVAL); 454 } 455 456 if (iosizelog) { 457 if (iosizelog > XFS_MAX_IO_LOG || 458 iosizelog < XFS_MIN_IO_LOG) { 459 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 460 iosizelog, XFS_MIN_IO_LOG, 461 XFS_MAX_IO_LOG); 462 return XFS_ERROR(EINVAL); 463 } 464 465 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 466 mp->m_readio_log = iosizelog; 467 mp->m_writeio_log = iosizelog; 468 } 469 470 return 0; 471 } 472 473 struct proc_xfs_info { 474 int flag; 475 char *str; 476 }; 477 478 STATIC int 479 xfs_showargs( 480 struct xfs_mount *mp, 481 struct seq_file *m) 482 { 483 static struct proc_xfs_info xfs_info_set[] = { 484 /* the few simple ones we can get from the mount struct */ 485 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP }, 486 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, 487 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, 488 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, 489 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, 490 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, 491 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, 492 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, 493 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, 494 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, 495 { 0, NULL } 496 }; 497 static struct proc_xfs_info xfs_info_unset[] = { 498 /* the few simple ones we can get from the mount struct */ 499 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO }, 500 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, 501 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, 502 { 0, NULL } 503 }; 504 struct proc_xfs_info *xfs_infop; 505 506 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 507 if (mp->m_flags & xfs_infop->flag) 508 seq_puts(m, xfs_infop->str); 509 } 510 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 511 if (!(mp->m_flags & xfs_infop->flag)) 512 seq_puts(m, xfs_infop->str); 513 } 514 515 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 516 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", 517 (int)(1 << mp->m_writeio_log) >> 10); 518 519 if (mp->m_logbufs > 0) 520 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); 521 if (mp->m_logbsize > 0) 522 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); 523 524 if (mp->m_logname) 525 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); 526 if (mp->m_rtname) 527 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); 528 529 if (mp->m_dalign > 0) 530 seq_printf(m, "," MNTOPT_SUNIT "=%d", 531 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 532 if (mp->m_swidth > 0) 533 seq_printf(m, "," MNTOPT_SWIDTH "=%d", 534 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 535 536 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 537 seq_puts(m, "," MNTOPT_USRQUOTA); 538 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 539 seq_puts(m, "," MNTOPT_UQUOTANOENF); 540 541 /* Either project or group quotas can be active, not both */ 542 543 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 544 if (mp->m_qflags & XFS_OQUOTA_ENFD) 545 seq_puts(m, "," MNTOPT_PRJQUOTA); 546 else 547 seq_puts(m, "," MNTOPT_PQUOTANOENF); 548 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) { 549 if (mp->m_qflags & XFS_OQUOTA_ENFD) 550 seq_puts(m, "," MNTOPT_GRPQUOTA); 551 else 552 seq_puts(m, "," MNTOPT_GQUOTANOENF); 553 } 554 555 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 556 seq_puts(m, "," MNTOPT_NOQUOTA); 557 558 return 0; 559 } 560 __uint64_t 561 xfs_max_file_offset( 562 unsigned int blockshift) 563 { 564 unsigned int pagefactor = 1; 565 unsigned int bitshift = BITS_PER_LONG - 1; 566 567 /* Figure out maximum filesize, on Linux this can depend on 568 * the filesystem blocksize (on 32 bit platforms). 569 * __block_write_begin does this in an [unsigned] long... 570 * page->index << (PAGE_CACHE_SHIFT - bbits) 571 * So, for page sized blocks (4K on 32 bit platforms), 572 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 573 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 574 * but for smaller blocksizes it is less (bbits = log2 bsize). 575 * Note1: get_block_t takes a long (implicit cast from above) 576 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 577 * can optionally convert the [unsigned] long from above into 578 * an [unsigned] long long. 579 */ 580 581 #if BITS_PER_LONG == 32 582 # if defined(CONFIG_LBDAF) 583 ASSERT(sizeof(sector_t) == 8); 584 pagefactor = PAGE_CACHE_SIZE; 585 bitshift = BITS_PER_LONG; 586 # else 587 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 588 # endif 589 #endif 590 591 return (((__uint64_t)pagefactor) << bitshift) - 1; 592 } 593 594 STATIC int 595 xfs_blkdev_get( 596 xfs_mount_t *mp, 597 const char *name, 598 struct block_device **bdevp) 599 { 600 int error = 0; 601 602 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 603 mp); 604 if (IS_ERR(*bdevp)) { 605 error = PTR_ERR(*bdevp); 606 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error); 607 } 608 609 return -error; 610 } 611 612 STATIC void 613 xfs_blkdev_put( 614 struct block_device *bdev) 615 { 616 if (bdev) 617 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 618 } 619 620 void 621 xfs_blkdev_issue_flush( 622 xfs_buftarg_t *buftarg) 623 { 624 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 625 } 626 627 STATIC void 628 xfs_close_devices( 629 struct xfs_mount *mp) 630 { 631 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 632 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 633 xfs_free_buftarg(mp, mp->m_logdev_targp); 634 xfs_blkdev_put(logdev); 635 } 636 if (mp->m_rtdev_targp) { 637 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 638 xfs_free_buftarg(mp, mp->m_rtdev_targp); 639 xfs_blkdev_put(rtdev); 640 } 641 xfs_free_buftarg(mp, mp->m_ddev_targp); 642 } 643 644 /* 645 * The file system configurations are: 646 * (1) device (partition) with data and internal log 647 * (2) logical volume with data and log subvolumes. 648 * (3) logical volume with data, log, and realtime subvolumes. 649 * 650 * We only have to handle opening the log and realtime volumes here if 651 * they are present. The data subvolume has already been opened by 652 * get_sb_bdev() and is stored in sb->s_bdev. 653 */ 654 STATIC int 655 xfs_open_devices( 656 struct xfs_mount *mp) 657 { 658 struct block_device *ddev = mp->m_super->s_bdev; 659 struct block_device *logdev = NULL, *rtdev = NULL; 660 int error; 661 662 /* 663 * Open real time and log devices - order is important. 664 */ 665 if (mp->m_logname) { 666 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 667 if (error) 668 goto out; 669 } 670 671 if (mp->m_rtname) { 672 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 673 if (error) 674 goto out_close_logdev; 675 676 if (rtdev == ddev || rtdev == logdev) { 677 xfs_warn(mp, 678 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 679 error = EINVAL; 680 goto out_close_rtdev; 681 } 682 } 683 684 /* 685 * Setup xfs_mount buffer target pointers 686 */ 687 error = ENOMEM; 688 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname); 689 if (!mp->m_ddev_targp) 690 goto out_close_rtdev; 691 692 if (rtdev) { 693 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1, 694 mp->m_fsname); 695 if (!mp->m_rtdev_targp) 696 goto out_free_ddev_targ; 697 } 698 699 if (logdev && logdev != ddev) { 700 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1, 701 mp->m_fsname); 702 if (!mp->m_logdev_targp) 703 goto out_free_rtdev_targ; 704 } else { 705 mp->m_logdev_targp = mp->m_ddev_targp; 706 } 707 708 return 0; 709 710 out_free_rtdev_targ: 711 if (mp->m_rtdev_targp) 712 xfs_free_buftarg(mp, mp->m_rtdev_targp); 713 out_free_ddev_targ: 714 xfs_free_buftarg(mp, mp->m_ddev_targp); 715 out_close_rtdev: 716 if (rtdev) 717 xfs_blkdev_put(rtdev); 718 out_close_logdev: 719 if (logdev && logdev != ddev) 720 xfs_blkdev_put(logdev); 721 out: 722 return error; 723 } 724 725 /* 726 * Setup xfs_mount buffer target pointers based on superblock 727 */ 728 STATIC int 729 xfs_setup_devices( 730 struct xfs_mount *mp) 731 { 732 int error; 733 734 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize, 735 mp->m_sb.sb_sectsize); 736 if (error) 737 return error; 738 739 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 740 unsigned int log_sector_size = BBSIZE; 741 742 if (xfs_sb_version_hassector(&mp->m_sb)) 743 log_sector_size = mp->m_sb.sb_logsectsize; 744 error = xfs_setsize_buftarg(mp->m_logdev_targp, 745 mp->m_sb.sb_blocksize, 746 log_sector_size); 747 if (error) 748 return error; 749 } 750 if (mp->m_rtdev_targp) { 751 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 752 mp->m_sb.sb_blocksize, 753 mp->m_sb.sb_sectsize); 754 if (error) 755 return error; 756 } 757 758 return 0; 759 } 760 761 STATIC int 762 xfs_init_mount_workqueues( 763 struct xfs_mount *mp) 764 { 765 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 766 WQ_MEM_RECLAIM, 0, mp->m_fsname); 767 if (!mp->m_data_workqueue) 768 goto out; 769 770 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 771 WQ_MEM_RECLAIM, 0, mp->m_fsname); 772 if (!mp->m_unwritten_workqueue) 773 goto out_destroy_data_iodone_queue; 774 775 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 776 WQ_MEM_RECLAIM, 0, mp->m_fsname); 777 if (!mp->m_cil_workqueue) 778 goto out_destroy_unwritten; 779 return 0; 780 781 out_destroy_unwritten: 782 destroy_workqueue(mp->m_unwritten_workqueue); 783 out_destroy_data_iodone_queue: 784 destroy_workqueue(mp->m_data_workqueue); 785 out: 786 return -ENOMEM; 787 } 788 789 STATIC void 790 xfs_destroy_mount_workqueues( 791 struct xfs_mount *mp) 792 { 793 destroy_workqueue(mp->m_cil_workqueue); 794 destroy_workqueue(mp->m_data_workqueue); 795 destroy_workqueue(mp->m_unwritten_workqueue); 796 } 797 798 /* Catch misguided souls that try to use this interface on XFS */ 799 STATIC struct inode * 800 xfs_fs_alloc_inode( 801 struct super_block *sb) 802 { 803 BUG(); 804 return NULL; 805 } 806 807 /* 808 * Now that the generic code is guaranteed not to be accessing 809 * the linux inode, we can reclaim the inode. 810 */ 811 STATIC void 812 xfs_fs_destroy_inode( 813 struct inode *inode) 814 { 815 struct xfs_inode *ip = XFS_I(inode); 816 817 trace_xfs_destroy_inode(ip); 818 819 XFS_STATS_INC(vn_reclaim); 820 821 /* bad inode, get out here ASAP */ 822 if (is_bad_inode(inode)) 823 goto out_reclaim; 824 825 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 826 827 /* 828 * We should never get here with one of the reclaim flags already set. 829 */ 830 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 831 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 832 833 /* 834 * We always use background reclaim here because even if the 835 * inode is clean, it still may be under IO and hence we have 836 * to take the flush lock. The background reclaim path handles 837 * this more efficiently than we can here, so simply let background 838 * reclaim tear down all inodes. 839 */ 840 out_reclaim: 841 xfs_inode_set_reclaim_tag(ip); 842 } 843 844 /* 845 * Slab object creation initialisation for the XFS inode. 846 * This covers only the idempotent fields in the XFS inode; 847 * all other fields need to be initialised on allocation 848 * from the slab. This avoids the need to repeatedly initialise 849 * fields in the xfs inode that left in the initialise state 850 * when freeing the inode. 851 */ 852 STATIC void 853 xfs_fs_inode_init_once( 854 void *inode) 855 { 856 struct xfs_inode *ip = inode; 857 858 memset(ip, 0, sizeof(struct xfs_inode)); 859 860 /* vfs inode */ 861 inode_init_once(VFS_I(ip)); 862 863 /* xfs inode */ 864 atomic_set(&ip->i_pincount, 0); 865 spin_lock_init(&ip->i_flags_lock); 866 867 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 868 "xfsino", ip->i_ino); 869 } 870 871 STATIC void 872 xfs_fs_evict_inode( 873 struct inode *inode) 874 { 875 xfs_inode_t *ip = XFS_I(inode); 876 877 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 878 879 trace_xfs_evict_inode(ip); 880 881 truncate_inode_pages(&inode->i_data, 0); 882 clear_inode(inode); 883 XFS_STATS_INC(vn_rele); 884 XFS_STATS_INC(vn_remove); 885 XFS_STATS_DEC(vn_active); 886 887 xfs_inactive(ip); 888 } 889 890 /* 891 * We do an unlocked check for XFS_IDONTCACHE here because we are already 892 * serialised against cache hits here via the inode->i_lock and igrab() in 893 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 894 * racing with us, and it avoids needing to grab a spinlock here for every inode 895 * we drop the final reference on. 896 */ 897 STATIC int 898 xfs_fs_drop_inode( 899 struct inode *inode) 900 { 901 struct xfs_inode *ip = XFS_I(inode); 902 903 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 904 } 905 906 STATIC void 907 xfs_free_fsname( 908 struct xfs_mount *mp) 909 { 910 kfree(mp->m_fsname); 911 kfree(mp->m_rtname); 912 kfree(mp->m_logname); 913 } 914 915 STATIC void 916 xfs_fs_put_super( 917 struct super_block *sb) 918 { 919 struct xfs_mount *mp = XFS_M(sb); 920 921 xfs_filestream_unmount(mp); 922 cancel_delayed_work_sync(&mp->m_sync_work); 923 xfs_unmountfs(mp); 924 xfs_syncd_stop(mp); 925 xfs_freesb(mp); 926 xfs_icsb_destroy_counters(mp); 927 xfs_destroy_mount_workqueues(mp); 928 xfs_close_devices(mp); 929 xfs_free_fsname(mp); 930 kfree(mp); 931 } 932 933 STATIC int 934 xfs_fs_sync_fs( 935 struct super_block *sb, 936 int wait) 937 { 938 struct xfs_mount *mp = XFS_M(sb); 939 int error; 940 941 /* 942 * Doing anything during the async pass would be counterproductive. 943 */ 944 if (!wait) 945 return 0; 946 947 error = xfs_quiesce_data(mp); 948 if (error) 949 return -error; 950 951 if (laptop_mode) { 952 /* 953 * The disk must be active because we're syncing. 954 * We schedule xfssyncd now (now that the disk is 955 * active) instead of later (when it might not be). 956 */ 957 flush_delayed_work_sync(&mp->m_sync_work); 958 } 959 960 return 0; 961 } 962 963 STATIC int 964 xfs_fs_statfs( 965 struct dentry *dentry, 966 struct kstatfs *statp) 967 { 968 struct xfs_mount *mp = XFS_M(dentry->d_sb); 969 xfs_sb_t *sbp = &mp->m_sb; 970 struct xfs_inode *ip = XFS_I(dentry->d_inode); 971 __uint64_t fakeinos, id; 972 xfs_extlen_t lsize; 973 __int64_t ffree; 974 975 statp->f_type = XFS_SB_MAGIC; 976 statp->f_namelen = MAXNAMELEN - 1; 977 978 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 979 statp->f_fsid.val[0] = (u32)id; 980 statp->f_fsid.val[1] = (u32)(id >> 32); 981 982 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 983 984 spin_lock(&mp->m_sb_lock); 985 statp->f_bsize = sbp->sb_blocksize; 986 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 987 statp->f_blocks = sbp->sb_dblocks - lsize; 988 statp->f_bfree = statp->f_bavail = 989 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 990 fakeinos = statp->f_bfree << sbp->sb_inopblog; 991 statp->f_files = 992 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 993 if (mp->m_maxicount) 994 statp->f_files = min_t(typeof(statp->f_files), 995 statp->f_files, 996 mp->m_maxicount); 997 998 /* make sure statp->f_ffree does not underflow */ 999 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); 1000 statp->f_ffree = max_t(__int64_t, ffree, 0); 1001 1002 spin_unlock(&mp->m_sb_lock); 1003 1004 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1005 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) == 1006 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD)) 1007 xfs_qm_statvfs(ip, statp); 1008 return 0; 1009 } 1010 1011 STATIC void 1012 xfs_save_resvblks(struct xfs_mount *mp) 1013 { 1014 __uint64_t resblks = 0; 1015 1016 mp->m_resblks_save = mp->m_resblks; 1017 xfs_reserve_blocks(mp, &resblks, NULL); 1018 } 1019 1020 STATIC void 1021 xfs_restore_resvblks(struct xfs_mount *mp) 1022 { 1023 __uint64_t resblks; 1024 1025 if (mp->m_resblks_save) { 1026 resblks = mp->m_resblks_save; 1027 mp->m_resblks_save = 0; 1028 } else 1029 resblks = xfs_default_resblks(mp); 1030 1031 xfs_reserve_blocks(mp, &resblks, NULL); 1032 } 1033 1034 STATIC int 1035 xfs_fs_remount( 1036 struct super_block *sb, 1037 int *flags, 1038 char *options) 1039 { 1040 struct xfs_mount *mp = XFS_M(sb); 1041 substring_t args[MAX_OPT_ARGS]; 1042 char *p; 1043 int error; 1044 1045 while ((p = strsep(&options, ",")) != NULL) { 1046 int token; 1047 1048 if (!*p) 1049 continue; 1050 1051 token = match_token(p, tokens, args); 1052 switch (token) { 1053 case Opt_barrier: 1054 mp->m_flags |= XFS_MOUNT_BARRIER; 1055 break; 1056 case Opt_nobarrier: 1057 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1058 break; 1059 default: 1060 /* 1061 * Logically we would return an error here to prevent 1062 * users from believing they might have changed 1063 * mount options using remount which can't be changed. 1064 * 1065 * But unfortunately mount(8) adds all options from 1066 * mtab and fstab to the mount arguments in some cases 1067 * so we can't blindly reject options, but have to 1068 * check for each specified option if it actually 1069 * differs from the currently set option and only 1070 * reject it if that's the case. 1071 * 1072 * Until that is implemented we return success for 1073 * every remount request, and silently ignore all 1074 * options that we can't actually change. 1075 */ 1076 #if 0 1077 xfs_info(mp, 1078 "mount option \"%s\" not supported for remount\n", p); 1079 return -EINVAL; 1080 #else 1081 break; 1082 #endif 1083 } 1084 } 1085 1086 /* ro -> rw */ 1087 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1088 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1089 1090 /* 1091 * If this is the first remount to writeable state we 1092 * might have some superblock changes to update. 1093 */ 1094 if (mp->m_update_flags) { 1095 error = xfs_mount_log_sb(mp, mp->m_update_flags); 1096 if (error) { 1097 xfs_warn(mp, "failed to write sb changes"); 1098 return error; 1099 } 1100 mp->m_update_flags = 0; 1101 } 1102 1103 /* 1104 * Fill out the reserve pool if it is empty. Use the stashed 1105 * value if it is non-zero, otherwise go with the default. 1106 */ 1107 xfs_restore_resvblks(mp); 1108 } 1109 1110 /* rw -> ro */ 1111 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1112 /* 1113 * After we have synced the data but before we sync the 1114 * metadata, we need to free up the reserve block pool so that 1115 * the used block count in the superblock on disk is correct at 1116 * the end of the remount. Stash the current reserve pool size 1117 * so that if we get remounted rw, we can return it to the same 1118 * size. 1119 */ 1120 1121 xfs_quiesce_data(mp); 1122 xfs_save_resvblks(mp); 1123 xfs_quiesce_attr(mp); 1124 mp->m_flags |= XFS_MOUNT_RDONLY; 1125 } 1126 1127 return 0; 1128 } 1129 1130 /* 1131 * Second stage of a freeze. The data is already frozen so we only 1132 * need to take care of the metadata. Once that's done write a dummy 1133 * record to dirty the log in case of a crash while frozen. 1134 */ 1135 STATIC int 1136 xfs_fs_freeze( 1137 struct super_block *sb) 1138 { 1139 struct xfs_mount *mp = XFS_M(sb); 1140 1141 xfs_save_resvblks(mp); 1142 xfs_quiesce_attr(mp); 1143 return -xfs_fs_log_dummy(mp); 1144 } 1145 1146 STATIC int 1147 xfs_fs_unfreeze( 1148 struct super_block *sb) 1149 { 1150 struct xfs_mount *mp = XFS_M(sb); 1151 1152 xfs_restore_resvblks(mp); 1153 return 0; 1154 } 1155 1156 STATIC int 1157 xfs_fs_show_options( 1158 struct seq_file *m, 1159 struct dentry *root) 1160 { 1161 return -xfs_showargs(XFS_M(root->d_sb), m); 1162 } 1163 1164 /* 1165 * This function fills in xfs_mount_t fields based on mount args. 1166 * Note: the superblock _has_ now been read in. 1167 */ 1168 STATIC int 1169 xfs_finish_flags( 1170 struct xfs_mount *mp) 1171 { 1172 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1173 1174 /* Fail a mount where the logbuf is smaller than the log stripe */ 1175 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1176 if (mp->m_logbsize <= 0 && 1177 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1178 mp->m_logbsize = mp->m_sb.sb_logsunit; 1179 } else if (mp->m_logbsize > 0 && 1180 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1181 xfs_warn(mp, 1182 "logbuf size must be greater than or equal to log stripe size"); 1183 return XFS_ERROR(EINVAL); 1184 } 1185 } else { 1186 /* Fail a mount if the logbuf is larger than 32K */ 1187 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1188 xfs_warn(mp, 1189 "logbuf size for version 1 logs must be 16K or 32K"); 1190 return XFS_ERROR(EINVAL); 1191 } 1192 } 1193 1194 /* 1195 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1196 * told by noattr2 to turn it off 1197 */ 1198 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1199 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1200 mp->m_flags |= XFS_MOUNT_ATTR2; 1201 1202 /* 1203 * prohibit r/w mounts of read-only filesystems 1204 */ 1205 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1206 xfs_warn(mp, 1207 "cannot mount a read-only filesystem as read-write"); 1208 return XFS_ERROR(EROFS); 1209 } 1210 1211 return 0; 1212 } 1213 1214 STATIC int 1215 xfs_fs_fill_super( 1216 struct super_block *sb, 1217 void *data, 1218 int silent) 1219 { 1220 struct inode *root; 1221 struct xfs_mount *mp = NULL; 1222 int flags = 0, error = ENOMEM; 1223 1224 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1225 if (!mp) 1226 goto out; 1227 1228 spin_lock_init(&mp->m_sb_lock); 1229 mutex_init(&mp->m_growlock); 1230 atomic_set(&mp->m_active_trans, 0); 1231 1232 mp->m_super = sb; 1233 sb->s_fs_info = mp; 1234 1235 error = xfs_parseargs(mp, (char *)data); 1236 if (error) 1237 goto out_free_fsname; 1238 1239 sb_min_blocksize(sb, BBSIZE); 1240 sb->s_xattr = xfs_xattr_handlers; 1241 sb->s_export_op = &xfs_export_operations; 1242 #ifdef CONFIG_XFS_QUOTA 1243 sb->s_qcop = &xfs_quotactl_operations; 1244 #endif 1245 sb->s_op = &xfs_super_operations; 1246 1247 if (silent) 1248 flags |= XFS_MFSI_QUIET; 1249 1250 error = xfs_open_devices(mp); 1251 if (error) 1252 goto out_free_fsname; 1253 1254 error = xfs_init_mount_workqueues(mp); 1255 if (error) 1256 goto out_close_devices; 1257 1258 error = xfs_icsb_init_counters(mp); 1259 if (error) 1260 goto out_destroy_workqueues; 1261 1262 error = xfs_readsb(mp, flags); 1263 if (error) 1264 goto out_destroy_counters; 1265 1266 error = xfs_finish_flags(mp); 1267 if (error) 1268 goto out_free_sb; 1269 1270 error = xfs_setup_devices(mp); 1271 if (error) 1272 goto out_free_sb; 1273 1274 error = xfs_filestream_mount(mp); 1275 if (error) 1276 goto out_free_sb; 1277 1278 /* 1279 * we must configure the block size in the superblock before we run the 1280 * full mount process as the mount process can lookup and cache inodes. 1281 * For the same reason we must also initialise the syncd and register 1282 * the inode cache shrinker so that inodes can be reclaimed during 1283 * operations like a quotacheck that iterate all inodes in the 1284 * filesystem. 1285 */ 1286 sb->s_magic = XFS_SB_MAGIC; 1287 sb->s_blocksize = mp->m_sb.sb_blocksize; 1288 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1289 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1290 sb->s_max_links = XFS_MAXLINK; 1291 sb->s_time_gran = 1; 1292 set_posix_acl_flag(sb); 1293 1294 error = xfs_syncd_init(mp); 1295 if (error) 1296 goto out_filestream_unmount; 1297 1298 error = xfs_mountfs(mp); 1299 if (error) 1300 goto out_syncd_stop; 1301 1302 root = igrab(VFS_I(mp->m_rootip)); 1303 if (!root) { 1304 error = ENOENT; 1305 goto out_unmount; 1306 } 1307 if (is_bad_inode(root)) { 1308 error = EINVAL; 1309 goto out_unmount; 1310 } 1311 sb->s_root = d_make_root(root); 1312 if (!sb->s_root) { 1313 error = ENOMEM; 1314 goto out_unmount; 1315 } 1316 1317 return 0; 1318 out_syncd_stop: 1319 xfs_syncd_stop(mp); 1320 out_filestream_unmount: 1321 xfs_filestream_unmount(mp); 1322 out_free_sb: 1323 xfs_freesb(mp); 1324 out_destroy_counters: 1325 xfs_icsb_destroy_counters(mp); 1326 out_destroy_workqueues: 1327 xfs_destroy_mount_workqueues(mp); 1328 out_close_devices: 1329 xfs_close_devices(mp); 1330 out_free_fsname: 1331 xfs_free_fsname(mp); 1332 kfree(mp); 1333 out: 1334 return -error; 1335 1336 out_unmount: 1337 xfs_filestream_unmount(mp); 1338 xfs_unmountfs(mp); 1339 xfs_syncd_stop(mp); 1340 goto out_free_sb; 1341 } 1342 1343 STATIC struct dentry * 1344 xfs_fs_mount( 1345 struct file_system_type *fs_type, 1346 int flags, 1347 const char *dev_name, 1348 void *data) 1349 { 1350 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1351 } 1352 1353 static int 1354 xfs_fs_nr_cached_objects( 1355 struct super_block *sb) 1356 { 1357 return xfs_reclaim_inodes_count(XFS_M(sb)); 1358 } 1359 1360 static void 1361 xfs_fs_free_cached_objects( 1362 struct super_block *sb, 1363 int nr_to_scan) 1364 { 1365 xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan); 1366 } 1367 1368 static const struct super_operations xfs_super_operations = { 1369 .alloc_inode = xfs_fs_alloc_inode, 1370 .destroy_inode = xfs_fs_destroy_inode, 1371 .evict_inode = xfs_fs_evict_inode, 1372 .drop_inode = xfs_fs_drop_inode, 1373 .put_super = xfs_fs_put_super, 1374 .sync_fs = xfs_fs_sync_fs, 1375 .freeze_fs = xfs_fs_freeze, 1376 .unfreeze_fs = xfs_fs_unfreeze, 1377 .statfs = xfs_fs_statfs, 1378 .remount_fs = xfs_fs_remount, 1379 .show_options = xfs_fs_show_options, 1380 .nr_cached_objects = xfs_fs_nr_cached_objects, 1381 .free_cached_objects = xfs_fs_free_cached_objects, 1382 }; 1383 1384 static struct file_system_type xfs_fs_type = { 1385 .owner = THIS_MODULE, 1386 .name = "xfs", 1387 .mount = xfs_fs_mount, 1388 .kill_sb = kill_block_super, 1389 .fs_flags = FS_REQUIRES_DEV, 1390 }; 1391 1392 STATIC int __init 1393 xfs_init_zones(void) 1394 { 1395 1396 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1397 if (!xfs_ioend_zone) 1398 goto out; 1399 1400 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1401 xfs_ioend_zone); 1402 if (!xfs_ioend_pool) 1403 goto out_destroy_ioend_zone; 1404 1405 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1406 "xfs_log_ticket"); 1407 if (!xfs_log_ticket_zone) 1408 goto out_destroy_ioend_pool; 1409 1410 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1411 "xfs_bmap_free_item"); 1412 if (!xfs_bmap_free_item_zone) 1413 goto out_destroy_log_ticket_zone; 1414 1415 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1416 "xfs_btree_cur"); 1417 if (!xfs_btree_cur_zone) 1418 goto out_destroy_bmap_free_item_zone; 1419 1420 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1421 "xfs_da_state"); 1422 if (!xfs_da_state_zone) 1423 goto out_destroy_btree_cur_zone; 1424 1425 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1426 if (!xfs_ifork_zone) 1427 goto out_destroy_da_state_zone; 1428 1429 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1430 if (!xfs_trans_zone) 1431 goto out_destroy_ifork_zone; 1432 1433 xfs_log_item_desc_zone = 1434 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1435 "xfs_log_item_desc"); 1436 if (!xfs_log_item_desc_zone) 1437 goto out_destroy_trans_zone; 1438 1439 /* 1440 * The size of the zone allocated buf log item is the maximum 1441 * size possible under XFS. This wastes a little bit of memory, 1442 * but it is much faster. 1443 */ 1444 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1445 "xfs_buf_item"); 1446 if (!xfs_buf_item_zone) 1447 goto out_destroy_log_item_desc_zone; 1448 1449 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1450 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1451 sizeof(xfs_extent_t))), "xfs_efd_item"); 1452 if (!xfs_efd_zone) 1453 goto out_destroy_buf_item_zone; 1454 1455 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1456 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1457 sizeof(xfs_extent_t))), "xfs_efi_item"); 1458 if (!xfs_efi_zone) 1459 goto out_destroy_efd_zone; 1460 1461 xfs_inode_zone = 1462 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1463 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1464 xfs_fs_inode_init_once); 1465 if (!xfs_inode_zone) 1466 goto out_destroy_efi_zone; 1467 1468 xfs_ili_zone = 1469 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1470 KM_ZONE_SPREAD, NULL); 1471 if (!xfs_ili_zone) 1472 goto out_destroy_inode_zone; 1473 1474 return 0; 1475 1476 out_destroy_inode_zone: 1477 kmem_zone_destroy(xfs_inode_zone); 1478 out_destroy_efi_zone: 1479 kmem_zone_destroy(xfs_efi_zone); 1480 out_destroy_efd_zone: 1481 kmem_zone_destroy(xfs_efd_zone); 1482 out_destroy_buf_item_zone: 1483 kmem_zone_destroy(xfs_buf_item_zone); 1484 out_destroy_log_item_desc_zone: 1485 kmem_zone_destroy(xfs_log_item_desc_zone); 1486 out_destroy_trans_zone: 1487 kmem_zone_destroy(xfs_trans_zone); 1488 out_destroy_ifork_zone: 1489 kmem_zone_destroy(xfs_ifork_zone); 1490 out_destroy_da_state_zone: 1491 kmem_zone_destroy(xfs_da_state_zone); 1492 out_destroy_btree_cur_zone: 1493 kmem_zone_destroy(xfs_btree_cur_zone); 1494 out_destroy_bmap_free_item_zone: 1495 kmem_zone_destroy(xfs_bmap_free_item_zone); 1496 out_destroy_log_ticket_zone: 1497 kmem_zone_destroy(xfs_log_ticket_zone); 1498 out_destroy_ioend_pool: 1499 mempool_destroy(xfs_ioend_pool); 1500 out_destroy_ioend_zone: 1501 kmem_zone_destroy(xfs_ioend_zone); 1502 out: 1503 return -ENOMEM; 1504 } 1505 1506 STATIC void 1507 xfs_destroy_zones(void) 1508 { 1509 kmem_zone_destroy(xfs_ili_zone); 1510 kmem_zone_destroy(xfs_inode_zone); 1511 kmem_zone_destroy(xfs_efi_zone); 1512 kmem_zone_destroy(xfs_efd_zone); 1513 kmem_zone_destroy(xfs_buf_item_zone); 1514 kmem_zone_destroy(xfs_log_item_desc_zone); 1515 kmem_zone_destroy(xfs_trans_zone); 1516 kmem_zone_destroy(xfs_ifork_zone); 1517 kmem_zone_destroy(xfs_da_state_zone); 1518 kmem_zone_destroy(xfs_btree_cur_zone); 1519 kmem_zone_destroy(xfs_bmap_free_item_zone); 1520 kmem_zone_destroy(xfs_log_ticket_zone); 1521 mempool_destroy(xfs_ioend_pool); 1522 kmem_zone_destroy(xfs_ioend_zone); 1523 1524 } 1525 1526 STATIC int __init 1527 xfs_init_workqueues(void) 1528 { 1529 /* 1530 * We never want to the same work item to run twice, reclaiming inodes 1531 * or idling the log is not going to get any faster by multiple CPUs 1532 * competing for ressources. Use the default large max_active value 1533 * so that even lots of filesystems can perform these task in parallel. 1534 */ 1535 xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0); 1536 if (!xfs_syncd_wq) 1537 return -ENOMEM; 1538 1539 /* 1540 * The allocation workqueue can be used in memory reclaim situations 1541 * (writepage path), and parallelism is only limited by the number of 1542 * AGs in all the filesystems mounted. Hence use the default large 1543 * max_active value for this workqueue. 1544 */ 1545 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0); 1546 if (!xfs_alloc_wq) 1547 goto out_destroy_syncd; 1548 1549 return 0; 1550 1551 out_destroy_syncd: 1552 destroy_workqueue(xfs_syncd_wq); 1553 return -ENOMEM; 1554 } 1555 1556 STATIC void 1557 xfs_destroy_workqueues(void) 1558 { 1559 destroy_workqueue(xfs_alloc_wq); 1560 destroy_workqueue(xfs_syncd_wq); 1561 } 1562 1563 STATIC int __init 1564 init_xfs_fs(void) 1565 { 1566 int error; 1567 1568 printk(KERN_INFO XFS_VERSION_STRING " with " 1569 XFS_BUILD_OPTIONS " enabled\n"); 1570 1571 xfs_dir_startup(); 1572 1573 error = xfs_init_zones(); 1574 if (error) 1575 goto out; 1576 1577 error = xfs_init_workqueues(); 1578 if (error) 1579 goto out_destroy_zones; 1580 1581 error = xfs_mru_cache_init(); 1582 if (error) 1583 goto out_destroy_wq; 1584 1585 error = xfs_filestream_init(); 1586 if (error) 1587 goto out_mru_cache_uninit; 1588 1589 error = xfs_buf_init(); 1590 if (error) 1591 goto out_filestream_uninit; 1592 1593 error = xfs_init_procfs(); 1594 if (error) 1595 goto out_buf_terminate; 1596 1597 error = xfs_sysctl_register(); 1598 if (error) 1599 goto out_cleanup_procfs; 1600 1601 error = xfs_qm_init(); 1602 if (error) 1603 goto out_sysctl_unregister; 1604 1605 error = register_filesystem(&xfs_fs_type); 1606 if (error) 1607 goto out_qm_exit; 1608 return 0; 1609 1610 out_qm_exit: 1611 xfs_qm_exit(); 1612 out_sysctl_unregister: 1613 xfs_sysctl_unregister(); 1614 out_cleanup_procfs: 1615 xfs_cleanup_procfs(); 1616 out_buf_terminate: 1617 xfs_buf_terminate(); 1618 out_filestream_uninit: 1619 xfs_filestream_uninit(); 1620 out_mru_cache_uninit: 1621 xfs_mru_cache_uninit(); 1622 out_destroy_wq: 1623 xfs_destroy_workqueues(); 1624 out_destroy_zones: 1625 xfs_destroy_zones(); 1626 out: 1627 return error; 1628 } 1629 1630 STATIC void __exit 1631 exit_xfs_fs(void) 1632 { 1633 xfs_qm_exit(); 1634 unregister_filesystem(&xfs_fs_type); 1635 xfs_sysctl_unregister(); 1636 xfs_cleanup_procfs(); 1637 xfs_buf_terminate(); 1638 xfs_filestream_uninit(); 1639 xfs_mru_cache_uninit(); 1640 xfs_destroy_workqueues(); 1641 xfs_destroy_zones(); 1642 } 1643 1644 module_init(init_xfs_fs); 1645 module_exit(exit_xfs_fs); 1646 1647 MODULE_AUTHOR("Silicon Graphics, Inc."); 1648 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1649 MODULE_LICENSE("GPL"); 1650