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 xfs_unmountfs(mp); 923 xfs_syncd_stop(mp); 924 xfs_freesb(mp); 925 xfs_icsb_destroy_counters(mp); 926 xfs_destroy_mount_workqueues(mp); 927 xfs_close_devices(mp); 928 xfs_free_fsname(mp); 929 kfree(mp); 930 } 931 932 STATIC int 933 xfs_fs_sync_fs( 934 struct super_block *sb, 935 int wait) 936 { 937 struct xfs_mount *mp = XFS_M(sb); 938 int error; 939 940 /* 941 * Doing anything during the async pass would be counterproductive. 942 */ 943 if (!wait) 944 return 0; 945 946 error = xfs_quiesce_data(mp); 947 if (error) 948 return -error; 949 950 if (laptop_mode) { 951 /* 952 * The disk must be active because we're syncing. 953 * We schedule xfssyncd now (now that the disk is 954 * active) instead of later (when it might not be). 955 */ 956 flush_delayed_work_sync(&mp->m_sync_work); 957 } 958 959 return 0; 960 } 961 962 STATIC int 963 xfs_fs_statfs( 964 struct dentry *dentry, 965 struct kstatfs *statp) 966 { 967 struct xfs_mount *mp = XFS_M(dentry->d_sb); 968 xfs_sb_t *sbp = &mp->m_sb; 969 struct xfs_inode *ip = XFS_I(dentry->d_inode); 970 __uint64_t fakeinos, id; 971 xfs_extlen_t lsize; 972 __int64_t ffree; 973 974 statp->f_type = XFS_SB_MAGIC; 975 statp->f_namelen = MAXNAMELEN - 1; 976 977 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 978 statp->f_fsid.val[0] = (u32)id; 979 statp->f_fsid.val[1] = (u32)(id >> 32); 980 981 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 982 983 spin_lock(&mp->m_sb_lock); 984 statp->f_bsize = sbp->sb_blocksize; 985 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 986 statp->f_blocks = sbp->sb_dblocks - lsize; 987 statp->f_bfree = statp->f_bavail = 988 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 989 fakeinos = statp->f_bfree << sbp->sb_inopblog; 990 statp->f_files = 991 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 992 if (mp->m_maxicount) 993 statp->f_files = min_t(typeof(statp->f_files), 994 statp->f_files, 995 mp->m_maxicount); 996 997 /* make sure statp->f_ffree does not underflow */ 998 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); 999 statp->f_ffree = max_t(__int64_t, ffree, 0); 1000 1001 spin_unlock(&mp->m_sb_lock); 1002 1003 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1004 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) == 1005 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD)) 1006 xfs_qm_statvfs(ip, statp); 1007 return 0; 1008 } 1009 1010 STATIC void 1011 xfs_save_resvblks(struct xfs_mount *mp) 1012 { 1013 __uint64_t resblks = 0; 1014 1015 mp->m_resblks_save = mp->m_resblks; 1016 xfs_reserve_blocks(mp, &resblks, NULL); 1017 } 1018 1019 STATIC void 1020 xfs_restore_resvblks(struct xfs_mount *mp) 1021 { 1022 __uint64_t resblks; 1023 1024 if (mp->m_resblks_save) { 1025 resblks = mp->m_resblks_save; 1026 mp->m_resblks_save = 0; 1027 } else 1028 resblks = xfs_default_resblks(mp); 1029 1030 xfs_reserve_blocks(mp, &resblks, NULL); 1031 } 1032 1033 STATIC int 1034 xfs_fs_remount( 1035 struct super_block *sb, 1036 int *flags, 1037 char *options) 1038 { 1039 struct xfs_mount *mp = XFS_M(sb); 1040 substring_t args[MAX_OPT_ARGS]; 1041 char *p; 1042 int error; 1043 1044 while ((p = strsep(&options, ",")) != NULL) { 1045 int token; 1046 1047 if (!*p) 1048 continue; 1049 1050 token = match_token(p, tokens, args); 1051 switch (token) { 1052 case Opt_barrier: 1053 mp->m_flags |= XFS_MOUNT_BARRIER; 1054 break; 1055 case Opt_nobarrier: 1056 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1057 break; 1058 default: 1059 /* 1060 * Logically we would return an error here to prevent 1061 * users from believing they might have changed 1062 * mount options using remount which can't be changed. 1063 * 1064 * But unfortunately mount(8) adds all options from 1065 * mtab and fstab to the mount arguments in some cases 1066 * so we can't blindly reject options, but have to 1067 * check for each specified option if it actually 1068 * differs from the currently set option and only 1069 * reject it if that's the case. 1070 * 1071 * Until that is implemented we return success for 1072 * every remount request, and silently ignore all 1073 * options that we can't actually change. 1074 */ 1075 #if 0 1076 xfs_info(mp, 1077 "mount option \"%s\" not supported for remount\n", p); 1078 return -EINVAL; 1079 #else 1080 break; 1081 #endif 1082 } 1083 } 1084 1085 /* ro -> rw */ 1086 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1087 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1088 1089 /* 1090 * If this is the first remount to writeable state we 1091 * might have some superblock changes to update. 1092 */ 1093 if (mp->m_update_flags) { 1094 error = xfs_mount_log_sb(mp, mp->m_update_flags); 1095 if (error) { 1096 xfs_warn(mp, "failed to write sb changes"); 1097 return error; 1098 } 1099 mp->m_update_flags = 0; 1100 } 1101 1102 /* 1103 * Fill out the reserve pool if it is empty. Use the stashed 1104 * value if it is non-zero, otherwise go with the default. 1105 */ 1106 xfs_restore_resvblks(mp); 1107 } 1108 1109 /* rw -> ro */ 1110 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1111 /* 1112 * After we have synced the data but before we sync the 1113 * metadata, we need to free up the reserve block pool so that 1114 * the used block count in the superblock on disk is correct at 1115 * the end of the remount. Stash the current reserve pool size 1116 * so that if we get remounted rw, we can return it to the same 1117 * size. 1118 */ 1119 1120 xfs_quiesce_data(mp); 1121 xfs_save_resvblks(mp); 1122 xfs_quiesce_attr(mp); 1123 mp->m_flags |= XFS_MOUNT_RDONLY; 1124 } 1125 1126 return 0; 1127 } 1128 1129 /* 1130 * Second stage of a freeze. The data is already frozen so we only 1131 * need to take care of the metadata. Once that's done write a dummy 1132 * record to dirty the log in case of a crash while frozen. 1133 */ 1134 STATIC int 1135 xfs_fs_freeze( 1136 struct super_block *sb) 1137 { 1138 struct xfs_mount *mp = XFS_M(sb); 1139 1140 xfs_save_resvblks(mp); 1141 xfs_quiesce_attr(mp); 1142 return -xfs_fs_log_dummy(mp); 1143 } 1144 1145 STATIC int 1146 xfs_fs_unfreeze( 1147 struct super_block *sb) 1148 { 1149 struct xfs_mount *mp = XFS_M(sb); 1150 1151 xfs_restore_resvblks(mp); 1152 return 0; 1153 } 1154 1155 STATIC int 1156 xfs_fs_show_options( 1157 struct seq_file *m, 1158 struct dentry *root) 1159 { 1160 return -xfs_showargs(XFS_M(root->d_sb), m); 1161 } 1162 1163 /* 1164 * This function fills in xfs_mount_t fields based on mount args. 1165 * Note: the superblock _has_ now been read in. 1166 */ 1167 STATIC int 1168 xfs_finish_flags( 1169 struct xfs_mount *mp) 1170 { 1171 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1172 1173 /* Fail a mount where the logbuf is smaller than the log stripe */ 1174 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1175 if (mp->m_logbsize <= 0 && 1176 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1177 mp->m_logbsize = mp->m_sb.sb_logsunit; 1178 } else if (mp->m_logbsize > 0 && 1179 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1180 xfs_warn(mp, 1181 "logbuf size must be greater than or equal to log stripe size"); 1182 return XFS_ERROR(EINVAL); 1183 } 1184 } else { 1185 /* Fail a mount if the logbuf is larger than 32K */ 1186 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1187 xfs_warn(mp, 1188 "logbuf size for version 1 logs must be 16K or 32K"); 1189 return XFS_ERROR(EINVAL); 1190 } 1191 } 1192 1193 /* 1194 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1195 * told by noattr2 to turn it off 1196 */ 1197 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1198 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1199 mp->m_flags |= XFS_MOUNT_ATTR2; 1200 1201 /* 1202 * prohibit r/w mounts of read-only filesystems 1203 */ 1204 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1205 xfs_warn(mp, 1206 "cannot mount a read-only filesystem as read-write"); 1207 return XFS_ERROR(EROFS); 1208 } 1209 1210 return 0; 1211 } 1212 1213 STATIC int 1214 xfs_fs_fill_super( 1215 struct super_block *sb, 1216 void *data, 1217 int silent) 1218 { 1219 struct inode *root; 1220 struct xfs_mount *mp = NULL; 1221 int flags = 0, error = ENOMEM; 1222 1223 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1224 if (!mp) 1225 goto out; 1226 1227 spin_lock_init(&mp->m_sb_lock); 1228 mutex_init(&mp->m_growlock); 1229 atomic_set(&mp->m_active_trans, 0); 1230 1231 mp->m_super = sb; 1232 sb->s_fs_info = mp; 1233 1234 error = xfs_parseargs(mp, (char *)data); 1235 if (error) 1236 goto out_free_fsname; 1237 1238 sb_min_blocksize(sb, BBSIZE); 1239 sb->s_xattr = xfs_xattr_handlers; 1240 sb->s_export_op = &xfs_export_operations; 1241 #ifdef CONFIG_XFS_QUOTA 1242 sb->s_qcop = &xfs_quotactl_operations; 1243 #endif 1244 sb->s_op = &xfs_super_operations; 1245 1246 if (silent) 1247 flags |= XFS_MFSI_QUIET; 1248 1249 error = xfs_open_devices(mp); 1250 if (error) 1251 goto out_free_fsname; 1252 1253 error = xfs_init_mount_workqueues(mp); 1254 if (error) 1255 goto out_close_devices; 1256 1257 error = xfs_icsb_init_counters(mp); 1258 if (error) 1259 goto out_destroy_workqueues; 1260 1261 error = xfs_readsb(mp, flags); 1262 if (error) 1263 goto out_destroy_counters; 1264 1265 error = xfs_finish_flags(mp); 1266 if (error) 1267 goto out_free_sb; 1268 1269 error = xfs_setup_devices(mp); 1270 if (error) 1271 goto out_free_sb; 1272 1273 error = xfs_filestream_mount(mp); 1274 if (error) 1275 goto out_free_sb; 1276 1277 /* 1278 * we must configure the block size in the superblock before we run the 1279 * full mount process as the mount process can lookup and cache inodes. 1280 * For the same reason we must also initialise the syncd and register 1281 * the inode cache shrinker so that inodes can be reclaimed during 1282 * operations like a quotacheck that iterate all inodes in the 1283 * filesystem. 1284 */ 1285 sb->s_magic = XFS_SB_MAGIC; 1286 sb->s_blocksize = mp->m_sb.sb_blocksize; 1287 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1288 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1289 sb->s_max_links = XFS_MAXLINK; 1290 sb->s_time_gran = 1; 1291 set_posix_acl_flag(sb); 1292 1293 error = xfs_syncd_init(mp); 1294 if (error) 1295 goto out_filestream_unmount; 1296 1297 error = xfs_mountfs(mp); 1298 if (error) 1299 goto out_syncd_stop; 1300 1301 root = igrab(VFS_I(mp->m_rootip)); 1302 if (!root) { 1303 error = ENOENT; 1304 goto out_unmount; 1305 } 1306 if (is_bad_inode(root)) { 1307 error = EINVAL; 1308 goto out_unmount; 1309 } 1310 sb->s_root = d_make_root(root); 1311 if (!sb->s_root) { 1312 error = ENOMEM; 1313 goto out_unmount; 1314 } 1315 1316 return 0; 1317 out_syncd_stop: 1318 xfs_syncd_stop(mp); 1319 out_filestream_unmount: 1320 xfs_filestream_unmount(mp); 1321 out_free_sb: 1322 xfs_freesb(mp); 1323 out_destroy_counters: 1324 xfs_icsb_destroy_counters(mp); 1325 out_destroy_workqueues: 1326 xfs_destroy_mount_workqueues(mp); 1327 out_close_devices: 1328 xfs_close_devices(mp); 1329 out_free_fsname: 1330 xfs_free_fsname(mp); 1331 kfree(mp); 1332 out: 1333 return -error; 1334 1335 out_unmount: 1336 xfs_filestream_unmount(mp); 1337 xfs_unmountfs(mp); 1338 xfs_syncd_stop(mp); 1339 goto out_free_sb; 1340 } 1341 1342 STATIC struct dentry * 1343 xfs_fs_mount( 1344 struct file_system_type *fs_type, 1345 int flags, 1346 const char *dev_name, 1347 void *data) 1348 { 1349 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1350 } 1351 1352 static int 1353 xfs_fs_nr_cached_objects( 1354 struct super_block *sb) 1355 { 1356 return xfs_reclaim_inodes_count(XFS_M(sb)); 1357 } 1358 1359 static void 1360 xfs_fs_free_cached_objects( 1361 struct super_block *sb, 1362 int nr_to_scan) 1363 { 1364 xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan); 1365 } 1366 1367 static const struct super_operations xfs_super_operations = { 1368 .alloc_inode = xfs_fs_alloc_inode, 1369 .destroy_inode = xfs_fs_destroy_inode, 1370 .evict_inode = xfs_fs_evict_inode, 1371 .drop_inode = xfs_fs_drop_inode, 1372 .put_super = xfs_fs_put_super, 1373 .sync_fs = xfs_fs_sync_fs, 1374 .freeze_fs = xfs_fs_freeze, 1375 .unfreeze_fs = xfs_fs_unfreeze, 1376 .statfs = xfs_fs_statfs, 1377 .remount_fs = xfs_fs_remount, 1378 .show_options = xfs_fs_show_options, 1379 .nr_cached_objects = xfs_fs_nr_cached_objects, 1380 .free_cached_objects = xfs_fs_free_cached_objects, 1381 }; 1382 1383 static struct file_system_type xfs_fs_type = { 1384 .owner = THIS_MODULE, 1385 .name = "xfs", 1386 .mount = xfs_fs_mount, 1387 .kill_sb = kill_block_super, 1388 .fs_flags = FS_REQUIRES_DEV, 1389 }; 1390 1391 STATIC int __init 1392 xfs_init_zones(void) 1393 { 1394 1395 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1396 if (!xfs_ioend_zone) 1397 goto out; 1398 1399 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1400 xfs_ioend_zone); 1401 if (!xfs_ioend_pool) 1402 goto out_destroy_ioend_zone; 1403 1404 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1405 "xfs_log_ticket"); 1406 if (!xfs_log_ticket_zone) 1407 goto out_destroy_ioend_pool; 1408 1409 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1410 "xfs_bmap_free_item"); 1411 if (!xfs_bmap_free_item_zone) 1412 goto out_destroy_log_ticket_zone; 1413 1414 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1415 "xfs_btree_cur"); 1416 if (!xfs_btree_cur_zone) 1417 goto out_destroy_bmap_free_item_zone; 1418 1419 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1420 "xfs_da_state"); 1421 if (!xfs_da_state_zone) 1422 goto out_destroy_btree_cur_zone; 1423 1424 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1425 if (!xfs_ifork_zone) 1426 goto out_destroy_da_state_zone; 1427 1428 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1429 if (!xfs_trans_zone) 1430 goto out_destroy_ifork_zone; 1431 1432 xfs_log_item_desc_zone = 1433 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1434 "xfs_log_item_desc"); 1435 if (!xfs_log_item_desc_zone) 1436 goto out_destroy_trans_zone; 1437 1438 /* 1439 * The size of the zone allocated buf log item is the maximum 1440 * size possible under XFS. This wastes a little bit of memory, 1441 * but it is much faster. 1442 */ 1443 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1444 "xfs_buf_item"); 1445 if (!xfs_buf_item_zone) 1446 goto out_destroy_log_item_desc_zone; 1447 1448 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1449 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1450 sizeof(xfs_extent_t))), "xfs_efd_item"); 1451 if (!xfs_efd_zone) 1452 goto out_destroy_buf_item_zone; 1453 1454 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1455 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1456 sizeof(xfs_extent_t))), "xfs_efi_item"); 1457 if (!xfs_efi_zone) 1458 goto out_destroy_efd_zone; 1459 1460 xfs_inode_zone = 1461 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1462 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1463 xfs_fs_inode_init_once); 1464 if (!xfs_inode_zone) 1465 goto out_destroy_efi_zone; 1466 1467 xfs_ili_zone = 1468 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1469 KM_ZONE_SPREAD, NULL); 1470 if (!xfs_ili_zone) 1471 goto out_destroy_inode_zone; 1472 1473 return 0; 1474 1475 out_destroy_inode_zone: 1476 kmem_zone_destroy(xfs_inode_zone); 1477 out_destroy_efi_zone: 1478 kmem_zone_destroy(xfs_efi_zone); 1479 out_destroy_efd_zone: 1480 kmem_zone_destroy(xfs_efd_zone); 1481 out_destroy_buf_item_zone: 1482 kmem_zone_destroy(xfs_buf_item_zone); 1483 out_destroy_log_item_desc_zone: 1484 kmem_zone_destroy(xfs_log_item_desc_zone); 1485 out_destroy_trans_zone: 1486 kmem_zone_destroy(xfs_trans_zone); 1487 out_destroy_ifork_zone: 1488 kmem_zone_destroy(xfs_ifork_zone); 1489 out_destroy_da_state_zone: 1490 kmem_zone_destroy(xfs_da_state_zone); 1491 out_destroy_btree_cur_zone: 1492 kmem_zone_destroy(xfs_btree_cur_zone); 1493 out_destroy_bmap_free_item_zone: 1494 kmem_zone_destroy(xfs_bmap_free_item_zone); 1495 out_destroy_log_ticket_zone: 1496 kmem_zone_destroy(xfs_log_ticket_zone); 1497 out_destroy_ioend_pool: 1498 mempool_destroy(xfs_ioend_pool); 1499 out_destroy_ioend_zone: 1500 kmem_zone_destroy(xfs_ioend_zone); 1501 out: 1502 return -ENOMEM; 1503 } 1504 1505 STATIC void 1506 xfs_destroy_zones(void) 1507 { 1508 kmem_zone_destroy(xfs_ili_zone); 1509 kmem_zone_destroy(xfs_inode_zone); 1510 kmem_zone_destroy(xfs_efi_zone); 1511 kmem_zone_destroy(xfs_efd_zone); 1512 kmem_zone_destroy(xfs_buf_item_zone); 1513 kmem_zone_destroy(xfs_log_item_desc_zone); 1514 kmem_zone_destroy(xfs_trans_zone); 1515 kmem_zone_destroy(xfs_ifork_zone); 1516 kmem_zone_destroy(xfs_da_state_zone); 1517 kmem_zone_destroy(xfs_btree_cur_zone); 1518 kmem_zone_destroy(xfs_bmap_free_item_zone); 1519 kmem_zone_destroy(xfs_log_ticket_zone); 1520 mempool_destroy(xfs_ioend_pool); 1521 kmem_zone_destroy(xfs_ioend_zone); 1522 1523 } 1524 1525 STATIC int __init 1526 xfs_init_workqueues(void) 1527 { 1528 /* 1529 * We never want to the same work item to run twice, reclaiming inodes 1530 * or idling the log is not going to get any faster by multiple CPUs 1531 * competing for ressources. Use the default large max_active value 1532 * so that even lots of filesystems can perform these task in parallel. 1533 */ 1534 xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0); 1535 if (!xfs_syncd_wq) 1536 return -ENOMEM; 1537 1538 /* 1539 * The allocation workqueue can be used in memory reclaim situations 1540 * (writepage path), and parallelism is only limited by the number of 1541 * AGs in all the filesystems mounted. Hence use the default large 1542 * max_active value for this workqueue. 1543 */ 1544 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0); 1545 if (!xfs_alloc_wq) 1546 goto out_destroy_syncd; 1547 1548 return 0; 1549 1550 out_destroy_syncd: 1551 destroy_workqueue(xfs_syncd_wq); 1552 return -ENOMEM; 1553 } 1554 1555 STATIC void 1556 xfs_destroy_workqueues(void) 1557 { 1558 destroy_workqueue(xfs_alloc_wq); 1559 destroy_workqueue(xfs_syncd_wq); 1560 } 1561 1562 STATIC int __init 1563 init_xfs_fs(void) 1564 { 1565 int error; 1566 1567 printk(KERN_INFO XFS_VERSION_STRING " with " 1568 XFS_BUILD_OPTIONS " enabled\n"); 1569 1570 xfs_dir_startup(); 1571 1572 error = xfs_init_zones(); 1573 if (error) 1574 goto out; 1575 1576 error = xfs_init_workqueues(); 1577 if (error) 1578 goto out_destroy_zones; 1579 1580 error = xfs_mru_cache_init(); 1581 if (error) 1582 goto out_destroy_wq; 1583 1584 error = xfs_filestream_init(); 1585 if (error) 1586 goto out_mru_cache_uninit; 1587 1588 error = xfs_buf_init(); 1589 if (error) 1590 goto out_filestream_uninit; 1591 1592 error = xfs_init_procfs(); 1593 if (error) 1594 goto out_buf_terminate; 1595 1596 error = xfs_sysctl_register(); 1597 if (error) 1598 goto out_cleanup_procfs; 1599 1600 error = xfs_qm_init(); 1601 if (error) 1602 goto out_sysctl_unregister; 1603 1604 error = register_filesystem(&xfs_fs_type); 1605 if (error) 1606 goto out_qm_exit; 1607 return 0; 1608 1609 out_qm_exit: 1610 xfs_qm_exit(); 1611 out_sysctl_unregister: 1612 xfs_sysctl_unregister(); 1613 out_cleanup_procfs: 1614 xfs_cleanup_procfs(); 1615 out_buf_terminate: 1616 xfs_buf_terminate(); 1617 out_filestream_uninit: 1618 xfs_filestream_uninit(); 1619 out_mru_cache_uninit: 1620 xfs_mru_cache_uninit(); 1621 out_destroy_wq: 1622 xfs_destroy_workqueues(); 1623 out_destroy_zones: 1624 xfs_destroy_zones(); 1625 out: 1626 return error; 1627 } 1628 1629 STATIC void __exit 1630 exit_xfs_fs(void) 1631 { 1632 xfs_qm_exit(); 1633 unregister_filesystem(&xfs_fs_type); 1634 xfs_sysctl_unregister(); 1635 xfs_cleanup_procfs(); 1636 xfs_buf_terminate(); 1637 xfs_filestream_uninit(); 1638 xfs_mru_cache_uninit(); 1639 xfs_destroy_workqueues(); 1640 xfs_destroy_zones(); 1641 } 1642 1643 module_init(init_xfs_fs); 1644 module_exit(exit_xfs_fs); 1645 1646 MODULE_AUTHOR("Silicon Graphics, Inc."); 1647 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1648 MODULE_LICENSE("GPL"); 1649