1 /* 2 * Copyright (c) 2000-2006 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #include "xfs.h" 20 #include "xfs_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_sb.h" 25 #include "xfs_mount.h" 26 #include "xfs_da_format.h" 27 #include "xfs_inode.h" 28 #include "xfs_btree.h" 29 #include "xfs_bmap.h" 30 #include "xfs_alloc.h" 31 #include "xfs_error.h" 32 #include "xfs_fsops.h" 33 #include "xfs_trans.h" 34 #include "xfs_buf_item.h" 35 #include "xfs_log.h" 36 #include "xfs_log_priv.h" 37 #include "xfs_da_btree.h" 38 #include "xfs_dir2.h" 39 #include "xfs_extfree_item.h" 40 #include "xfs_mru_cache.h" 41 #include "xfs_inode_item.h" 42 #include "xfs_icache.h" 43 #include "xfs_trace.h" 44 #include "xfs_icreate_item.h" 45 #include "xfs_filestream.h" 46 #include "xfs_quota.h" 47 #include "xfs_sysfs.h" 48 49 #include <linux/namei.h> 50 #include <linux/init.h> 51 #include <linux/slab.h> 52 #include <linux/mount.h> 53 #include <linux/mempool.h> 54 #include <linux/writeback.h> 55 #include <linux/kthread.h> 56 #include <linux/freezer.h> 57 #include <linux/parser.h> 58 59 static const struct super_operations xfs_super_operations; 60 static kmem_zone_t *xfs_ioend_zone; 61 mempool_t *xfs_ioend_pool; 62 63 static struct kset *xfs_kset; /* top-level xfs sysfs dir */ 64 #ifdef DEBUG 65 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ 66 #endif 67 68 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ 69 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ 70 #define MNTOPT_LOGDEV "logdev" /* log device */ 71 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ 72 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ 73 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ 74 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ 75 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ 76 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ 77 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ 78 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ 79 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ 80 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ 81 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ 82 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ 83 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ 84 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ 85 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ 86 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and 87 * unwritten extent conversion */ 88 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ 89 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ 90 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to 91 * XFS_MAXINUMBER_32 */ 92 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ 93 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ 94 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ 95 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes 96 * in stat(). */ 97 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ 98 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ 99 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ 100 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ 101 #define MNTOPT_NOQUOTA "noquota" /* no quotas */ 102 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ 103 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ 104 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ 105 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ 106 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ 107 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ 108 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ 109 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ 110 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ 111 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ 112 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ 113 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ 114 115 #define MNTOPT_DAX "dax" /* Enable direct access to bdev pages */ 116 117 /* 118 * Table driven mount option parser. 119 * 120 * Currently only used for remount, but it will be used for mount 121 * in the future, too. 122 */ 123 enum { 124 Opt_barrier, 125 Opt_nobarrier, 126 Opt_inode64, 127 Opt_inode32, 128 Opt_err 129 }; 130 131 static const match_table_t tokens = { 132 {Opt_barrier, "barrier"}, 133 {Opt_nobarrier, "nobarrier"}, 134 {Opt_inode64, "inode64"}, 135 {Opt_inode32, "inode32"}, 136 {Opt_err, NULL} 137 }; 138 139 140 STATIC unsigned long 141 suffix_kstrtoint(char *s, unsigned int base, int *res) 142 { 143 int last, shift_left_factor = 0, _res; 144 char *value = s; 145 146 last = strlen(value) - 1; 147 if (value[last] == 'K' || value[last] == 'k') { 148 shift_left_factor = 10; 149 value[last] = '\0'; 150 } 151 if (value[last] == 'M' || value[last] == 'm') { 152 shift_left_factor = 20; 153 value[last] = '\0'; 154 } 155 if (value[last] == 'G' || value[last] == 'g') { 156 shift_left_factor = 30; 157 value[last] = '\0'; 158 } 159 160 if (kstrtoint(s, base, &_res)) 161 return -EINVAL; 162 *res = _res << shift_left_factor; 163 return 0; 164 } 165 166 /* 167 * This function fills in xfs_mount_t fields based on mount args. 168 * Note: the superblock has _not_ yet been read in. 169 * 170 * Note that this function leaks the various device name allocations on 171 * failure. The caller takes care of them. 172 */ 173 STATIC int 174 xfs_parseargs( 175 struct xfs_mount *mp, 176 char *options) 177 { 178 struct super_block *sb = mp->m_super; 179 char *this_char, *value; 180 int dsunit = 0; 181 int dswidth = 0; 182 int iosize = 0; 183 __uint8_t iosizelog = 0; 184 185 /* 186 * set up the mount name first so all the errors will refer to the 187 * correct device. 188 */ 189 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 190 if (!mp->m_fsname) 191 return -ENOMEM; 192 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 193 194 /* 195 * Copy binary VFS mount flags we are interested in. 196 */ 197 if (sb->s_flags & MS_RDONLY) 198 mp->m_flags |= XFS_MOUNT_RDONLY; 199 if (sb->s_flags & MS_DIRSYNC) 200 mp->m_flags |= XFS_MOUNT_DIRSYNC; 201 if (sb->s_flags & MS_SYNCHRONOUS) 202 mp->m_flags |= XFS_MOUNT_WSYNC; 203 204 /* 205 * Set some default flags that could be cleared by the mount option 206 * parsing. 207 */ 208 mp->m_flags |= XFS_MOUNT_BARRIER; 209 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 210 211 /* 212 * These can be overridden by the mount option parsing. 213 */ 214 mp->m_logbufs = -1; 215 mp->m_logbsize = -1; 216 217 if (!options) 218 goto done; 219 220 while ((this_char = strsep(&options, ",")) != NULL) { 221 if (!*this_char) 222 continue; 223 if ((value = strchr(this_char, '=')) != NULL) 224 *value++ = 0; 225 226 if (!strcmp(this_char, MNTOPT_LOGBUFS)) { 227 if (!value || !*value) { 228 xfs_warn(mp, "%s option requires an argument", 229 this_char); 230 return -EINVAL; 231 } 232 if (kstrtoint(value, 10, &mp->m_logbufs)) 233 return -EINVAL; 234 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { 235 if (!value || !*value) { 236 xfs_warn(mp, "%s option requires an argument", 237 this_char); 238 return -EINVAL; 239 } 240 if (suffix_kstrtoint(value, 10, &mp->m_logbsize)) 241 return -EINVAL; 242 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { 243 if (!value || !*value) { 244 xfs_warn(mp, "%s option requires an argument", 245 this_char); 246 return -EINVAL; 247 } 248 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 249 if (!mp->m_logname) 250 return -ENOMEM; 251 } else if (!strcmp(this_char, MNTOPT_MTPT)) { 252 xfs_warn(mp, "%s option not allowed on this system", 253 this_char); 254 return -EINVAL; 255 } else if (!strcmp(this_char, MNTOPT_RTDEV)) { 256 if (!value || !*value) { 257 xfs_warn(mp, "%s option requires an argument", 258 this_char); 259 return -EINVAL; 260 } 261 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 262 if (!mp->m_rtname) 263 return -ENOMEM; 264 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { 265 if (!value || !*value) { 266 xfs_warn(mp, "%s option requires an argument", 267 this_char); 268 return -EINVAL; 269 } 270 if (kstrtoint(value, 10, &iosize)) 271 return -EINVAL; 272 iosizelog = ffs(iosize) - 1; 273 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { 274 if (!value || !*value) { 275 xfs_warn(mp, "%s option requires an argument", 276 this_char); 277 return -EINVAL; 278 } 279 if (suffix_kstrtoint(value, 10, &iosize)) 280 return -EINVAL; 281 iosizelog = ffs(iosize) - 1; 282 } else if (!strcmp(this_char, MNTOPT_GRPID) || 283 !strcmp(this_char, MNTOPT_BSDGROUPS)) { 284 mp->m_flags |= XFS_MOUNT_GRPID; 285 } else if (!strcmp(this_char, MNTOPT_NOGRPID) || 286 !strcmp(this_char, MNTOPT_SYSVGROUPS)) { 287 mp->m_flags &= ~XFS_MOUNT_GRPID; 288 } else if (!strcmp(this_char, MNTOPT_WSYNC)) { 289 mp->m_flags |= XFS_MOUNT_WSYNC; 290 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { 291 mp->m_flags |= XFS_MOUNT_NORECOVERY; 292 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { 293 mp->m_flags |= XFS_MOUNT_NOALIGN; 294 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { 295 mp->m_flags |= XFS_MOUNT_SWALLOC; 296 } else if (!strcmp(this_char, MNTOPT_SUNIT)) { 297 if (!value || !*value) { 298 xfs_warn(mp, "%s option requires an argument", 299 this_char); 300 return -EINVAL; 301 } 302 if (kstrtoint(value, 10, &dsunit)) 303 return -EINVAL; 304 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { 305 if (!value || !*value) { 306 xfs_warn(mp, "%s option requires an argument", 307 this_char); 308 return -EINVAL; 309 } 310 if (kstrtoint(value, 10, &dswidth)) 311 return -EINVAL; 312 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) { 313 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 314 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { 315 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 316 } else if (!strcmp(this_char, MNTOPT_NOUUID)) { 317 mp->m_flags |= XFS_MOUNT_NOUUID; 318 } else if (!strcmp(this_char, MNTOPT_BARRIER)) { 319 mp->m_flags |= XFS_MOUNT_BARRIER; 320 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { 321 mp->m_flags &= ~XFS_MOUNT_BARRIER; 322 } else if (!strcmp(this_char, MNTOPT_IKEEP)) { 323 mp->m_flags |= XFS_MOUNT_IKEEP; 324 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { 325 mp->m_flags &= ~XFS_MOUNT_IKEEP; 326 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { 327 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 328 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { 329 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 330 } else if (!strcmp(this_char, MNTOPT_ATTR2)) { 331 mp->m_flags |= XFS_MOUNT_ATTR2; 332 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { 333 mp->m_flags &= ~XFS_MOUNT_ATTR2; 334 mp->m_flags |= XFS_MOUNT_NOATTR2; 335 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { 336 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 337 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { 338 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 339 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 340 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 341 } else if (!strcmp(this_char, MNTOPT_QUOTA) || 342 !strcmp(this_char, MNTOPT_UQUOTA) || 343 !strcmp(this_char, MNTOPT_USRQUOTA)) { 344 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 345 XFS_UQUOTA_ENFD); 346 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || 347 !strcmp(this_char, MNTOPT_UQUOTANOENF)) { 348 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 349 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 350 } else if (!strcmp(this_char, MNTOPT_PQUOTA) || 351 !strcmp(this_char, MNTOPT_PRJQUOTA)) { 352 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 353 XFS_PQUOTA_ENFD); 354 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { 355 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 356 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 357 } else if (!strcmp(this_char, MNTOPT_GQUOTA) || 358 !strcmp(this_char, MNTOPT_GRPQUOTA)) { 359 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 360 XFS_GQUOTA_ENFD); 361 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { 362 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 363 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 364 } else if (!strcmp(this_char, MNTOPT_DISCARD)) { 365 mp->m_flags |= XFS_MOUNT_DISCARD; 366 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { 367 mp->m_flags &= ~XFS_MOUNT_DISCARD; 368 #ifdef CONFIG_FS_DAX 369 } else if (!strcmp(this_char, MNTOPT_DAX)) { 370 mp->m_flags |= XFS_MOUNT_DAX; 371 #endif 372 } else { 373 xfs_warn(mp, "unknown mount option [%s].", this_char); 374 return -EINVAL; 375 } 376 } 377 378 /* 379 * no recovery flag requires a read-only mount 380 */ 381 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 382 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 383 xfs_warn(mp, "no-recovery mounts must be read-only."); 384 return -EINVAL; 385 } 386 387 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 388 xfs_warn(mp, 389 "sunit and swidth options incompatible with the noalign option"); 390 return -EINVAL; 391 } 392 393 #ifndef CONFIG_XFS_QUOTA 394 if (XFS_IS_QUOTA_RUNNING(mp)) { 395 xfs_warn(mp, "quota support not available in this kernel."); 396 return -EINVAL; 397 } 398 #endif 399 400 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 401 xfs_warn(mp, "sunit and swidth must be specified together"); 402 return -EINVAL; 403 } 404 405 if (dsunit && (dswidth % dsunit != 0)) { 406 xfs_warn(mp, 407 "stripe width (%d) must be a multiple of the stripe unit (%d)", 408 dswidth, dsunit); 409 return -EINVAL; 410 } 411 412 done: 413 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { 414 /* 415 * At this point the superblock has not been read 416 * in, therefore we do not know the block size. 417 * Before the mount call ends we will convert 418 * these to FSBs. 419 */ 420 mp->m_dalign = dsunit; 421 mp->m_swidth = dswidth; 422 } 423 424 if (mp->m_logbufs != -1 && 425 mp->m_logbufs != 0 && 426 (mp->m_logbufs < XLOG_MIN_ICLOGS || 427 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 428 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 429 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 430 return -EINVAL; 431 } 432 if (mp->m_logbsize != -1 && 433 mp->m_logbsize != 0 && 434 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 435 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 436 !is_power_of_2(mp->m_logbsize))) { 437 xfs_warn(mp, 438 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 439 mp->m_logbsize); 440 return -EINVAL; 441 } 442 443 if (iosizelog) { 444 if (iosizelog > XFS_MAX_IO_LOG || 445 iosizelog < XFS_MIN_IO_LOG) { 446 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 447 iosizelog, XFS_MIN_IO_LOG, 448 XFS_MAX_IO_LOG); 449 return -EINVAL; 450 } 451 452 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 453 mp->m_readio_log = iosizelog; 454 mp->m_writeio_log = iosizelog; 455 } 456 457 return 0; 458 } 459 460 struct proc_xfs_info { 461 uint64_t flag; 462 char *str; 463 }; 464 465 STATIC int 466 xfs_showargs( 467 struct xfs_mount *mp, 468 struct seq_file *m) 469 { 470 static struct proc_xfs_info xfs_info_set[] = { 471 /* the few simple ones we can get from the mount struct */ 472 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP }, 473 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, 474 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, 475 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, 476 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, 477 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, 478 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, 479 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, 480 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, 481 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, 482 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE }, 483 { XFS_MOUNT_DAX, "," MNTOPT_DAX }, 484 { 0, NULL } 485 }; 486 static struct proc_xfs_info xfs_info_unset[] = { 487 /* the few simple ones we can get from the mount struct */ 488 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO }, 489 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, 490 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, 491 { 0, NULL } 492 }; 493 struct proc_xfs_info *xfs_infop; 494 495 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 496 if (mp->m_flags & xfs_infop->flag) 497 seq_puts(m, xfs_infop->str); 498 } 499 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 500 if (!(mp->m_flags & xfs_infop->flag)) 501 seq_puts(m, xfs_infop->str); 502 } 503 504 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 505 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", 506 (int)(1 << mp->m_writeio_log) >> 10); 507 508 if (mp->m_logbufs > 0) 509 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); 510 if (mp->m_logbsize > 0) 511 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); 512 513 if (mp->m_logname) 514 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); 515 if (mp->m_rtname) 516 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); 517 518 if (mp->m_dalign > 0) 519 seq_printf(m, "," MNTOPT_SUNIT "=%d", 520 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 521 if (mp->m_swidth > 0) 522 seq_printf(m, "," MNTOPT_SWIDTH "=%d", 523 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 524 525 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 526 seq_puts(m, "," MNTOPT_USRQUOTA); 527 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 528 seq_puts(m, "," MNTOPT_UQUOTANOENF); 529 530 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 531 if (mp->m_qflags & XFS_PQUOTA_ENFD) 532 seq_puts(m, "," MNTOPT_PRJQUOTA); 533 else 534 seq_puts(m, "," MNTOPT_PQUOTANOENF); 535 } 536 if (mp->m_qflags & XFS_GQUOTA_ACCT) { 537 if (mp->m_qflags & XFS_GQUOTA_ENFD) 538 seq_puts(m, "," MNTOPT_GRPQUOTA); 539 else 540 seq_puts(m, "," MNTOPT_GQUOTANOENF); 541 } 542 543 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 544 seq_puts(m, "," MNTOPT_NOQUOTA); 545 546 return 0; 547 } 548 __uint64_t 549 xfs_max_file_offset( 550 unsigned int blockshift) 551 { 552 unsigned int pagefactor = 1; 553 unsigned int bitshift = BITS_PER_LONG - 1; 554 555 /* Figure out maximum filesize, on Linux this can depend on 556 * the filesystem blocksize (on 32 bit platforms). 557 * __block_write_begin does this in an [unsigned] long... 558 * page->index << (PAGE_CACHE_SHIFT - bbits) 559 * So, for page sized blocks (4K on 32 bit platforms), 560 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 561 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 562 * but for smaller blocksizes it is less (bbits = log2 bsize). 563 * Note1: get_block_t takes a long (implicit cast from above) 564 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 565 * can optionally convert the [unsigned] long from above into 566 * an [unsigned] long long. 567 */ 568 569 #if BITS_PER_LONG == 32 570 # if defined(CONFIG_LBDAF) 571 ASSERT(sizeof(sector_t) == 8); 572 pagefactor = PAGE_CACHE_SIZE; 573 bitshift = BITS_PER_LONG; 574 # else 575 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 576 # endif 577 #endif 578 579 return (((__uint64_t)pagefactor) << bitshift) - 1; 580 } 581 582 /* 583 * xfs_set_inode32() and xfs_set_inode64() are passed an agcount 584 * because in the growfs case, mp->m_sb.sb_agcount is not updated 585 * yet to the potentially higher ag count. 586 */ 587 xfs_agnumber_t 588 xfs_set_inode32(struct xfs_mount *mp, xfs_agnumber_t agcount) 589 { 590 xfs_agnumber_t index = 0; 591 xfs_agnumber_t maxagi = 0; 592 xfs_sb_t *sbp = &mp->m_sb; 593 xfs_agnumber_t max_metadata; 594 xfs_agino_t agino; 595 xfs_ino_t ino; 596 xfs_perag_t *pag; 597 598 /* Calculate how much should be reserved for inodes to meet 599 * the max inode percentage. 600 */ 601 if (mp->m_maxicount) { 602 __uint64_t icount; 603 604 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 605 do_div(icount, 100); 606 icount += sbp->sb_agblocks - 1; 607 do_div(icount, sbp->sb_agblocks); 608 max_metadata = icount; 609 } else { 610 max_metadata = agcount; 611 } 612 613 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); 614 615 for (index = 0; index < agcount; index++) { 616 ino = XFS_AGINO_TO_INO(mp, index, agino); 617 618 if (ino > XFS_MAXINUMBER_32) { 619 pag = xfs_perag_get(mp, index); 620 pag->pagi_inodeok = 0; 621 pag->pagf_metadata = 0; 622 xfs_perag_put(pag); 623 continue; 624 } 625 626 pag = xfs_perag_get(mp, index); 627 pag->pagi_inodeok = 1; 628 maxagi++; 629 if (index < max_metadata) 630 pag->pagf_metadata = 1; 631 xfs_perag_put(pag); 632 } 633 mp->m_flags |= (XFS_MOUNT_32BITINODES | 634 XFS_MOUNT_SMALL_INUMS); 635 636 return maxagi; 637 } 638 639 xfs_agnumber_t 640 xfs_set_inode64(struct xfs_mount *mp, xfs_agnumber_t agcount) 641 { 642 xfs_agnumber_t index = 0; 643 644 for (index = 0; index < agcount; index++) { 645 struct xfs_perag *pag; 646 647 pag = xfs_perag_get(mp, index); 648 pag->pagi_inodeok = 1; 649 pag->pagf_metadata = 0; 650 xfs_perag_put(pag); 651 } 652 653 /* There is no need for lock protection on m_flags, 654 * the rw_semaphore of the VFS superblock is locked 655 * during mount/umount/remount operations, so this is 656 * enough to avoid concurency on the m_flags field 657 */ 658 mp->m_flags &= ~(XFS_MOUNT_32BITINODES | 659 XFS_MOUNT_SMALL_INUMS); 660 return index; 661 } 662 663 STATIC int 664 xfs_blkdev_get( 665 xfs_mount_t *mp, 666 const char *name, 667 struct block_device **bdevp) 668 { 669 int error = 0; 670 671 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 672 mp); 673 if (IS_ERR(*bdevp)) { 674 error = PTR_ERR(*bdevp); 675 xfs_warn(mp, "Invalid device [%s], error=%d", name, error); 676 } 677 678 return error; 679 } 680 681 STATIC void 682 xfs_blkdev_put( 683 struct block_device *bdev) 684 { 685 if (bdev) 686 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 687 } 688 689 void 690 xfs_blkdev_issue_flush( 691 xfs_buftarg_t *buftarg) 692 { 693 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 694 } 695 696 STATIC void 697 xfs_close_devices( 698 struct xfs_mount *mp) 699 { 700 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 701 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 702 xfs_free_buftarg(mp, mp->m_logdev_targp); 703 xfs_blkdev_put(logdev); 704 } 705 if (mp->m_rtdev_targp) { 706 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 707 xfs_free_buftarg(mp, mp->m_rtdev_targp); 708 xfs_blkdev_put(rtdev); 709 } 710 xfs_free_buftarg(mp, mp->m_ddev_targp); 711 } 712 713 /* 714 * The file system configurations are: 715 * (1) device (partition) with data and internal log 716 * (2) logical volume with data and log subvolumes. 717 * (3) logical volume with data, log, and realtime subvolumes. 718 * 719 * We only have to handle opening the log and realtime volumes here if 720 * they are present. The data subvolume has already been opened by 721 * get_sb_bdev() and is stored in sb->s_bdev. 722 */ 723 STATIC int 724 xfs_open_devices( 725 struct xfs_mount *mp) 726 { 727 struct block_device *ddev = mp->m_super->s_bdev; 728 struct block_device *logdev = NULL, *rtdev = NULL; 729 int error; 730 731 /* 732 * Open real time and log devices - order is important. 733 */ 734 if (mp->m_logname) { 735 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 736 if (error) 737 goto out; 738 } 739 740 if (mp->m_rtname) { 741 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 742 if (error) 743 goto out_close_logdev; 744 745 if (rtdev == ddev || rtdev == logdev) { 746 xfs_warn(mp, 747 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 748 error = -EINVAL; 749 goto out_close_rtdev; 750 } 751 } 752 753 /* 754 * Setup xfs_mount buffer target pointers 755 */ 756 error = -ENOMEM; 757 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev); 758 if (!mp->m_ddev_targp) 759 goto out_close_rtdev; 760 761 if (rtdev) { 762 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev); 763 if (!mp->m_rtdev_targp) 764 goto out_free_ddev_targ; 765 } 766 767 if (logdev && logdev != ddev) { 768 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev); 769 if (!mp->m_logdev_targp) 770 goto out_free_rtdev_targ; 771 } else { 772 mp->m_logdev_targp = mp->m_ddev_targp; 773 } 774 775 return 0; 776 777 out_free_rtdev_targ: 778 if (mp->m_rtdev_targp) 779 xfs_free_buftarg(mp, mp->m_rtdev_targp); 780 out_free_ddev_targ: 781 xfs_free_buftarg(mp, mp->m_ddev_targp); 782 out_close_rtdev: 783 xfs_blkdev_put(rtdev); 784 out_close_logdev: 785 if (logdev && logdev != ddev) 786 xfs_blkdev_put(logdev); 787 out: 788 return error; 789 } 790 791 /* 792 * Setup xfs_mount buffer target pointers based on superblock 793 */ 794 STATIC int 795 xfs_setup_devices( 796 struct xfs_mount *mp) 797 { 798 int error; 799 800 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); 801 if (error) 802 return error; 803 804 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 805 unsigned int log_sector_size = BBSIZE; 806 807 if (xfs_sb_version_hassector(&mp->m_sb)) 808 log_sector_size = mp->m_sb.sb_logsectsize; 809 error = xfs_setsize_buftarg(mp->m_logdev_targp, 810 log_sector_size); 811 if (error) 812 return error; 813 } 814 if (mp->m_rtdev_targp) { 815 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 816 mp->m_sb.sb_sectsize); 817 if (error) 818 return error; 819 } 820 821 return 0; 822 } 823 824 STATIC int 825 xfs_init_mount_workqueues( 826 struct xfs_mount *mp) 827 { 828 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s", 829 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname); 830 if (!mp->m_buf_workqueue) 831 goto out; 832 833 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 834 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 835 if (!mp->m_data_workqueue) 836 goto out_destroy_buf; 837 838 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 839 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 840 if (!mp->m_unwritten_workqueue) 841 goto out_destroy_data_iodone_queue; 842 843 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 844 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); 845 if (!mp->m_cil_workqueue) 846 goto out_destroy_unwritten; 847 848 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 849 WQ_FREEZABLE, 0, mp->m_fsname); 850 if (!mp->m_reclaim_workqueue) 851 goto out_destroy_cil; 852 853 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", 854 WQ_FREEZABLE|WQ_HIGHPRI, 0, mp->m_fsname); 855 if (!mp->m_log_workqueue) 856 goto out_destroy_reclaim; 857 858 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", 859 WQ_FREEZABLE, 0, mp->m_fsname); 860 if (!mp->m_eofblocks_workqueue) 861 goto out_destroy_log; 862 863 return 0; 864 865 out_destroy_log: 866 destroy_workqueue(mp->m_log_workqueue); 867 out_destroy_reclaim: 868 destroy_workqueue(mp->m_reclaim_workqueue); 869 out_destroy_cil: 870 destroy_workqueue(mp->m_cil_workqueue); 871 out_destroy_unwritten: 872 destroy_workqueue(mp->m_unwritten_workqueue); 873 out_destroy_data_iodone_queue: 874 destroy_workqueue(mp->m_data_workqueue); 875 out_destroy_buf: 876 destroy_workqueue(mp->m_buf_workqueue); 877 out: 878 return -ENOMEM; 879 } 880 881 STATIC void 882 xfs_destroy_mount_workqueues( 883 struct xfs_mount *mp) 884 { 885 destroy_workqueue(mp->m_eofblocks_workqueue); 886 destroy_workqueue(mp->m_log_workqueue); 887 destroy_workqueue(mp->m_reclaim_workqueue); 888 destroy_workqueue(mp->m_cil_workqueue); 889 destroy_workqueue(mp->m_data_workqueue); 890 destroy_workqueue(mp->m_unwritten_workqueue); 891 destroy_workqueue(mp->m_buf_workqueue); 892 } 893 894 /* 895 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 896 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 897 * for IO to complete so that we effectively throttle multiple callers to the 898 * rate at which IO is completing. 899 */ 900 void 901 xfs_flush_inodes( 902 struct xfs_mount *mp) 903 { 904 struct super_block *sb = mp->m_super; 905 906 if (down_read_trylock(&sb->s_umount)) { 907 sync_inodes_sb(sb); 908 up_read(&sb->s_umount); 909 } 910 } 911 912 /* Catch misguided souls that try to use this interface on XFS */ 913 STATIC struct inode * 914 xfs_fs_alloc_inode( 915 struct super_block *sb) 916 { 917 BUG(); 918 return NULL; 919 } 920 921 /* 922 * Now that the generic code is guaranteed not to be accessing 923 * the linux inode, we can reclaim the inode. 924 */ 925 STATIC void 926 xfs_fs_destroy_inode( 927 struct inode *inode) 928 { 929 struct xfs_inode *ip = XFS_I(inode); 930 931 trace_xfs_destroy_inode(ip); 932 933 XFS_STATS_INC(vn_reclaim); 934 935 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 936 937 /* 938 * We should never get here with one of the reclaim flags already set. 939 */ 940 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 941 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 942 943 /* 944 * We always use background reclaim here because even if the 945 * inode is clean, it still may be under IO and hence we have 946 * to take the flush lock. The background reclaim path handles 947 * this more efficiently than we can here, so simply let background 948 * reclaim tear down all inodes. 949 */ 950 xfs_inode_set_reclaim_tag(ip); 951 } 952 953 /* 954 * Slab object creation initialisation for the XFS inode. 955 * This covers only the idempotent fields in the XFS inode; 956 * all other fields need to be initialised on allocation 957 * from the slab. This avoids the need to repeatedly initialise 958 * fields in the xfs inode that left in the initialise state 959 * when freeing the inode. 960 */ 961 STATIC void 962 xfs_fs_inode_init_once( 963 void *inode) 964 { 965 struct xfs_inode *ip = inode; 966 967 memset(ip, 0, sizeof(struct xfs_inode)); 968 969 /* vfs inode */ 970 inode_init_once(VFS_I(ip)); 971 972 /* xfs inode */ 973 atomic_set(&ip->i_pincount, 0); 974 spin_lock_init(&ip->i_flags_lock); 975 976 mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 977 "xfsino", ip->i_ino); 978 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 979 "xfsino", ip->i_ino); 980 } 981 982 STATIC void 983 xfs_fs_evict_inode( 984 struct inode *inode) 985 { 986 xfs_inode_t *ip = XFS_I(inode); 987 988 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 989 990 trace_xfs_evict_inode(ip); 991 992 truncate_inode_pages_final(&inode->i_data); 993 clear_inode(inode); 994 XFS_STATS_INC(vn_rele); 995 XFS_STATS_INC(vn_remove); 996 997 xfs_inactive(ip); 998 } 999 1000 /* 1001 * We do an unlocked check for XFS_IDONTCACHE here because we are already 1002 * serialised against cache hits here via the inode->i_lock and igrab() in 1003 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 1004 * racing with us, and it avoids needing to grab a spinlock here for every inode 1005 * we drop the final reference on. 1006 */ 1007 STATIC int 1008 xfs_fs_drop_inode( 1009 struct inode *inode) 1010 { 1011 struct xfs_inode *ip = XFS_I(inode); 1012 1013 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 1014 } 1015 1016 STATIC void 1017 xfs_free_fsname( 1018 struct xfs_mount *mp) 1019 { 1020 kfree(mp->m_fsname); 1021 kfree(mp->m_rtname); 1022 kfree(mp->m_logname); 1023 } 1024 1025 STATIC int 1026 xfs_fs_sync_fs( 1027 struct super_block *sb, 1028 int wait) 1029 { 1030 struct xfs_mount *mp = XFS_M(sb); 1031 1032 /* 1033 * Doing anything during the async pass would be counterproductive. 1034 */ 1035 if (!wait) 1036 return 0; 1037 1038 xfs_log_force(mp, XFS_LOG_SYNC); 1039 if (laptop_mode) { 1040 /* 1041 * The disk must be active because we're syncing. 1042 * We schedule log work now (now that the disk is 1043 * active) instead of later (when it might not be). 1044 */ 1045 flush_delayed_work(&mp->m_log->l_work); 1046 } 1047 1048 return 0; 1049 } 1050 1051 STATIC int 1052 xfs_fs_statfs( 1053 struct dentry *dentry, 1054 struct kstatfs *statp) 1055 { 1056 struct xfs_mount *mp = XFS_M(dentry->d_sb); 1057 xfs_sb_t *sbp = &mp->m_sb; 1058 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1059 __uint64_t fakeinos, id; 1060 __uint64_t icount; 1061 __uint64_t ifree; 1062 __uint64_t fdblocks; 1063 xfs_extlen_t lsize; 1064 __int64_t ffree; 1065 1066 statp->f_type = XFS_SB_MAGIC; 1067 statp->f_namelen = MAXNAMELEN - 1; 1068 1069 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 1070 statp->f_fsid.val[0] = (u32)id; 1071 statp->f_fsid.val[1] = (u32)(id >> 32); 1072 1073 icount = percpu_counter_sum(&mp->m_icount); 1074 ifree = percpu_counter_sum(&mp->m_ifree); 1075 fdblocks = percpu_counter_sum(&mp->m_fdblocks); 1076 1077 spin_lock(&mp->m_sb_lock); 1078 statp->f_bsize = sbp->sb_blocksize; 1079 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 1080 statp->f_blocks = sbp->sb_dblocks - lsize; 1081 spin_unlock(&mp->m_sb_lock); 1082 1083 statp->f_bfree = fdblocks - XFS_ALLOC_SET_ASIDE(mp); 1084 statp->f_bavail = statp->f_bfree; 1085 1086 fakeinos = statp->f_bfree << sbp->sb_inopblog; 1087 statp->f_files = MIN(icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 1088 if (mp->m_maxicount) 1089 statp->f_files = min_t(typeof(statp->f_files), 1090 statp->f_files, 1091 mp->m_maxicount); 1092 1093 /* If sb_icount overshot maxicount, report actual allocation */ 1094 statp->f_files = max_t(typeof(statp->f_files), 1095 statp->f_files, 1096 sbp->sb_icount); 1097 1098 /* make sure statp->f_ffree does not underflow */ 1099 ffree = statp->f_files - (icount - ifree); 1100 statp->f_ffree = max_t(__int64_t, ffree, 0); 1101 1102 1103 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1104 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 1105 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 1106 xfs_qm_statvfs(ip, statp); 1107 return 0; 1108 } 1109 1110 STATIC void 1111 xfs_save_resvblks(struct xfs_mount *mp) 1112 { 1113 __uint64_t resblks = 0; 1114 1115 mp->m_resblks_save = mp->m_resblks; 1116 xfs_reserve_blocks(mp, &resblks, NULL); 1117 } 1118 1119 STATIC void 1120 xfs_restore_resvblks(struct xfs_mount *mp) 1121 { 1122 __uint64_t resblks; 1123 1124 if (mp->m_resblks_save) { 1125 resblks = mp->m_resblks_save; 1126 mp->m_resblks_save = 0; 1127 } else 1128 resblks = xfs_default_resblks(mp); 1129 1130 xfs_reserve_blocks(mp, &resblks, NULL); 1131 } 1132 1133 /* 1134 * Trigger writeback of all the dirty metadata in the file system. 1135 * 1136 * This ensures that the metadata is written to their location on disk rather 1137 * than just existing in transactions in the log. This means after a quiesce 1138 * there is no log replay required to write the inodes to disk - this is the 1139 * primary difference between a sync and a quiesce. 1140 * 1141 * Note: xfs_log_quiesce() stops background log work - the callers must ensure 1142 * it is started again when appropriate. 1143 */ 1144 static void 1145 xfs_quiesce_attr( 1146 struct xfs_mount *mp) 1147 { 1148 int error = 0; 1149 1150 /* wait for all modifications to complete */ 1151 while (atomic_read(&mp->m_active_trans) > 0) 1152 delay(100); 1153 1154 /* force the log to unpin objects from the now complete transactions */ 1155 xfs_log_force(mp, XFS_LOG_SYNC); 1156 1157 /* reclaim inodes to do any IO before the freeze completes */ 1158 xfs_reclaim_inodes(mp, 0); 1159 xfs_reclaim_inodes(mp, SYNC_WAIT); 1160 1161 /* Push the superblock and write an unmount record */ 1162 error = xfs_log_sbcount(mp); 1163 if (error) 1164 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " 1165 "Frozen image may not be consistent."); 1166 /* 1167 * Just warn here till VFS can correctly support 1168 * read-only remount without racing. 1169 */ 1170 WARN_ON(atomic_read(&mp->m_active_trans) != 0); 1171 1172 xfs_log_quiesce(mp); 1173 } 1174 1175 STATIC int 1176 xfs_fs_remount( 1177 struct super_block *sb, 1178 int *flags, 1179 char *options) 1180 { 1181 struct xfs_mount *mp = XFS_M(sb); 1182 xfs_sb_t *sbp = &mp->m_sb; 1183 substring_t args[MAX_OPT_ARGS]; 1184 char *p; 1185 int error; 1186 1187 sync_filesystem(sb); 1188 while ((p = strsep(&options, ",")) != NULL) { 1189 int token; 1190 1191 if (!*p) 1192 continue; 1193 1194 token = match_token(p, tokens, args); 1195 switch (token) { 1196 case Opt_barrier: 1197 mp->m_flags |= XFS_MOUNT_BARRIER; 1198 break; 1199 case Opt_nobarrier: 1200 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1201 break; 1202 case Opt_inode64: 1203 mp->m_maxagi = xfs_set_inode64(mp, sbp->sb_agcount); 1204 break; 1205 case Opt_inode32: 1206 mp->m_maxagi = xfs_set_inode32(mp, sbp->sb_agcount); 1207 break; 1208 default: 1209 /* 1210 * Logically we would return an error here to prevent 1211 * users from believing they might have changed 1212 * mount options using remount which can't be changed. 1213 * 1214 * But unfortunately mount(8) adds all options from 1215 * mtab and fstab to the mount arguments in some cases 1216 * so we can't blindly reject options, but have to 1217 * check for each specified option if it actually 1218 * differs from the currently set option and only 1219 * reject it if that's the case. 1220 * 1221 * Until that is implemented we return success for 1222 * every remount request, and silently ignore all 1223 * options that we can't actually change. 1224 */ 1225 #if 0 1226 xfs_info(mp, 1227 "mount option \"%s\" not supported for remount", p); 1228 return -EINVAL; 1229 #else 1230 break; 1231 #endif 1232 } 1233 } 1234 1235 /* ro -> rw */ 1236 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1237 if (mp->m_flags & XFS_MOUNT_NORECOVERY) { 1238 xfs_warn(mp, 1239 "ro->rw transition prohibited on norecovery mount"); 1240 return -EINVAL; 1241 } 1242 1243 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1244 1245 /* 1246 * If this is the first remount to writeable state we 1247 * might have some superblock changes to update. 1248 */ 1249 if (mp->m_update_sb) { 1250 error = xfs_sync_sb(mp, false); 1251 if (error) { 1252 xfs_warn(mp, "failed to write sb changes"); 1253 return error; 1254 } 1255 mp->m_update_sb = false; 1256 } 1257 1258 /* 1259 * Fill out the reserve pool if it is empty. Use the stashed 1260 * value if it is non-zero, otherwise go with the default. 1261 */ 1262 xfs_restore_resvblks(mp); 1263 xfs_log_work_queue(mp); 1264 } 1265 1266 /* rw -> ro */ 1267 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1268 /* 1269 * Before we sync the metadata, we need to free up the reserve 1270 * block pool so that the used block count in the superblock on 1271 * disk is correct at the end of the remount. Stash the current 1272 * reserve pool size so that if we get remounted rw, we can 1273 * return it to the same size. 1274 */ 1275 xfs_save_resvblks(mp); 1276 xfs_quiesce_attr(mp); 1277 mp->m_flags |= XFS_MOUNT_RDONLY; 1278 } 1279 1280 return 0; 1281 } 1282 1283 /* 1284 * Second stage of a freeze. The data is already frozen so we only 1285 * need to take care of the metadata. Once that's done sync the superblock 1286 * to the log to dirty it in case of a crash while frozen. This ensures that we 1287 * will recover the unlinked inode lists on the next mount. 1288 */ 1289 STATIC int 1290 xfs_fs_freeze( 1291 struct super_block *sb) 1292 { 1293 struct xfs_mount *mp = XFS_M(sb); 1294 1295 xfs_save_resvblks(mp); 1296 xfs_quiesce_attr(mp); 1297 return xfs_sync_sb(mp, true); 1298 } 1299 1300 STATIC int 1301 xfs_fs_unfreeze( 1302 struct super_block *sb) 1303 { 1304 struct xfs_mount *mp = XFS_M(sb); 1305 1306 xfs_restore_resvblks(mp); 1307 xfs_log_work_queue(mp); 1308 return 0; 1309 } 1310 1311 STATIC int 1312 xfs_fs_show_options( 1313 struct seq_file *m, 1314 struct dentry *root) 1315 { 1316 return xfs_showargs(XFS_M(root->d_sb), m); 1317 } 1318 1319 /* 1320 * This function fills in xfs_mount_t fields based on mount args. 1321 * Note: the superblock _has_ now been read in. 1322 */ 1323 STATIC int 1324 xfs_finish_flags( 1325 struct xfs_mount *mp) 1326 { 1327 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1328 1329 /* Fail a mount where the logbuf is smaller than the log stripe */ 1330 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1331 if (mp->m_logbsize <= 0 && 1332 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1333 mp->m_logbsize = mp->m_sb.sb_logsunit; 1334 } else if (mp->m_logbsize > 0 && 1335 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1336 xfs_warn(mp, 1337 "logbuf size must be greater than or equal to log stripe size"); 1338 return -EINVAL; 1339 } 1340 } else { 1341 /* Fail a mount if the logbuf is larger than 32K */ 1342 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1343 xfs_warn(mp, 1344 "logbuf size for version 1 logs must be 16K or 32K"); 1345 return -EINVAL; 1346 } 1347 } 1348 1349 /* 1350 * V5 filesystems always use attr2 format for attributes. 1351 */ 1352 if (xfs_sb_version_hascrc(&mp->m_sb) && 1353 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 1354 xfs_warn(mp, 1355 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.", 1356 MNTOPT_NOATTR2, MNTOPT_ATTR2); 1357 return -EINVAL; 1358 } 1359 1360 /* 1361 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1362 * told by noattr2 to turn it off 1363 */ 1364 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1365 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1366 mp->m_flags |= XFS_MOUNT_ATTR2; 1367 1368 /* 1369 * prohibit r/w mounts of read-only filesystems 1370 */ 1371 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1372 xfs_warn(mp, 1373 "cannot mount a read-only filesystem as read-write"); 1374 return -EROFS; 1375 } 1376 1377 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 1378 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && 1379 !xfs_sb_version_has_pquotino(&mp->m_sb)) { 1380 xfs_warn(mp, 1381 "Super block does not support project and group quota together"); 1382 return -EINVAL; 1383 } 1384 1385 return 0; 1386 } 1387 1388 static int 1389 xfs_init_percpu_counters( 1390 struct xfs_mount *mp) 1391 { 1392 int error; 1393 1394 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); 1395 if (error) 1396 return -ENOMEM; 1397 1398 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); 1399 if (error) 1400 goto free_icount; 1401 1402 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); 1403 if (error) 1404 goto free_ifree; 1405 1406 return 0; 1407 1408 free_ifree: 1409 percpu_counter_destroy(&mp->m_ifree); 1410 free_icount: 1411 percpu_counter_destroy(&mp->m_icount); 1412 return -ENOMEM; 1413 } 1414 1415 void 1416 xfs_reinit_percpu_counters( 1417 struct xfs_mount *mp) 1418 { 1419 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); 1420 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree); 1421 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks); 1422 } 1423 1424 static void 1425 xfs_destroy_percpu_counters( 1426 struct xfs_mount *mp) 1427 { 1428 percpu_counter_destroy(&mp->m_icount); 1429 percpu_counter_destroy(&mp->m_ifree); 1430 percpu_counter_destroy(&mp->m_fdblocks); 1431 } 1432 1433 STATIC int 1434 xfs_fs_fill_super( 1435 struct super_block *sb, 1436 void *data, 1437 int silent) 1438 { 1439 struct inode *root; 1440 struct xfs_mount *mp = NULL; 1441 int flags = 0, error = -ENOMEM; 1442 1443 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1444 if (!mp) 1445 goto out; 1446 1447 spin_lock_init(&mp->m_sb_lock); 1448 mutex_init(&mp->m_growlock); 1449 atomic_set(&mp->m_active_trans, 0); 1450 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1451 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); 1452 mp->m_kobj.kobject.kset = xfs_kset; 1453 1454 mp->m_super = sb; 1455 sb->s_fs_info = mp; 1456 1457 error = xfs_parseargs(mp, (char *)data); 1458 if (error) 1459 goto out_free_fsname; 1460 1461 sb_min_blocksize(sb, BBSIZE); 1462 sb->s_xattr = xfs_xattr_handlers; 1463 sb->s_export_op = &xfs_export_operations; 1464 #ifdef CONFIG_XFS_QUOTA 1465 sb->s_qcop = &xfs_quotactl_operations; 1466 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 1467 #endif 1468 sb->s_op = &xfs_super_operations; 1469 1470 if (silent) 1471 flags |= XFS_MFSI_QUIET; 1472 1473 error = xfs_open_devices(mp); 1474 if (error) 1475 goto out_free_fsname; 1476 1477 error = xfs_init_mount_workqueues(mp); 1478 if (error) 1479 goto out_close_devices; 1480 1481 error = xfs_init_percpu_counters(mp); 1482 if (error) 1483 goto out_destroy_workqueues; 1484 1485 error = xfs_readsb(mp, flags); 1486 if (error) 1487 goto out_destroy_counters; 1488 1489 error = xfs_finish_flags(mp); 1490 if (error) 1491 goto out_free_sb; 1492 1493 error = xfs_setup_devices(mp); 1494 if (error) 1495 goto out_free_sb; 1496 1497 error = xfs_filestream_mount(mp); 1498 if (error) 1499 goto out_free_sb; 1500 1501 /* 1502 * we must configure the block size in the superblock before we run the 1503 * full mount process as the mount process can lookup and cache inodes. 1504 */ 1505 sb->s_magic = XFS_SB_MAGIC; 1506 sb->s_blocksize = mp->m_sb.sb_blocksize; 1507 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1508 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1509 sb->s_max_links = XFS_MAXLINK; 1510 sb->s_time_gran = 1; 1511 set_posix_acl_flag(sb); 1512 1513 /* version 5 superblocks support inode version counters. */ 1514 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1515 sb->s_flags |= MS_I_VERSION; 1516 1517 if (mp->m_flags & XFS_MOUNT_DAX) { 1518 xfs_warn(mp, 1519 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1520 if (sb->s_blocksize != PAGE_SIZE) { 1521 xfs_alert(mp, 1522 "Filesystem block size invalid for DAX Turning DAX off."); 1523 mp->m_flags &= ~XFS_MOUNT_DAX; 1524 } else if (!sb->s_bdev->bd_disk->fops->direct_access) { 1525 xfs_alert(mp, 1526 "Block device does not support DAX Turning DAX off."); 1527 mp->m_flags &= ~XFS_MOUNT_DAX; 1528 } 1529 } 1530 1531 error = xfs_mountfs(mp); 1532 if (error) 1533 goto out_filestream_unmount; 1534 1535 root = igrab(VFS_I(mp->m_rootip)); 1536 if (!root) { 1537 error = -ENOENT; 1538 goto out_unmount; 1539 } 1540 sb->s_root = d_make_root(root); 1541 if (!sb->s_root) { 1542 error = -ENOMEM; 1543 goto out_unmount; 1544 } 1545 1546 return 0; 1547 1548 out_filestream_unmount: 1549 xfs_filestream_unmount(mp); 1550 out_free_sb: 1551 xfs_freesb(mp); 1552 out_destroy_counters: 1553 xfs_destroy_percpu_counters(mp); 1554 out_destroy_workqueues: 1555 xfs_destroy_mount_workqueues(mp); 1556 out_close_devices: 1557 xfs_close_devices(mp); 1558 out_free_fsname: 1559 xfs_free_fsname(mp); 1560 kfree(mp); 1561 out: 1562 return error; 1563 1564 out_unmount: 1565 xfs_filestream_unmount(mp); 1566 xfs_unmountfs(mp); 1567 goto out_free_sb; 1568 } 1569 1570 STATIC void 1571 xfs_fs_put_super( 1572 struct super_block *sb) 1573 { 1574 struct xfs_mount *mp = XFS_M(sb); 1575 1576 xfs_notice(mp, "Unmounting Filesystem"); 1577 xfs_filestream_unmount(mp); 1578 xfs_unmountfs(mp); 1579 1580 xfs_freesb(mp); 1581 xfs_destroy_percpu_counters(mp); 1582 xfs_destroy_mount_workqueues(mp); 1583 xfs_close_devices(mp); 1584 xfs_free_fsname(mp); 1585 kfree(mp); 1586 } 1587 1588 STATIC struct dentry * 1589 xfs_fs_mount( 1590 struct file_system_type *fs_type, 1591 int flags, 1592 const char *dev_name, 1593 void *data) 1594 { 1595 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1596 } 1597 1598 static long 1599 xfs_fs_nr_cached_objects( 1600 struct super_block *sb, 1601 struct shrink_control *sc) 1602 { 1603 return xfs_reclaim_inodes_count(XFS_M(sb)); 1604 } 1605 1606 static long 1607 xfs_fs_free_cached_objects( 1608 struct super_block *sb, 1609 struct shrink_control *sc) 1610 { 1611 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); 1612 } 1613 1614 static const struct super_operations xfs_super_operations = { 1615 .alloc_inode = xfs_fs_alloc_inode, 1616 .destroy_inode = xfs_fs_destroy_inode, 1617 .evict_inode = xfs_fs_evict_inode, 1618 .drop_inode = xfs_fs_drop_inode, 1619 .put_super = xfs_fs_put_super, 1620 .sync_fs = xfs_fs_sync_fs, 1621 .freeze_fs = xfs_fs_freeze, 1622 .unfreeze_fs = xfs_fs_unfreeze, 1623 .statfs = xfs_fs_statfs, 1624 .remount_fs = xfs_fs_remount, 1625 .show_options = xfs_fs_show_options, 1626 .nr_cached_objects = xfs_fs_nr_cached_objects, 1627 .free_cached_objects = xfs_fs_free_cached_objects, 1628 }; 1629 1630 static struct file_system_type xfs_fs_type = { 1631 .owner = THIS_MODULE, 1632 .name = "xfs", 1633 .mount = xfs_fs_mount, 1634 .kill_sb = kill_block_super, 1635 .fs_flags = FS_REQUIRES_DEV, 1636 }; 1637 MODULE_ALIAS_FS("xfs"); 1638 1639 STATIC int __init 1640 xfs_init_zones(void) 1641 { 1642 1643 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1644 if (!xfs_ioend_zone) 1645 goto out; 1646 1647 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1648 xfs_ioend_zone); 1649 if (!xfs_ioend_pool) 1650 goto out_destroy_ioend_zone; 1651 1652 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1653 "xfs_log_ticket"); 1654 if (!xfs_log_ticket_zone) 1655 goto out_destroy_ioend_pool; 1656 1657 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1658 "xfs_bmap_free_item"); 1659 if (!xfs_bmap_free_item_zone) 1660 goto out_destroy_log_ticket_zone; 1661 1662 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1663 "xfs_btree_cur"); 1664 if (!xfs_btree_cur_zone) 1665 goto out_destroy_bmap_free_item_zone; 1666 1667 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1668 "xfs_da_state"); 1669 if (!xfs_da_state_zone) 1670 goto out_destroy_btree_cur_zone; 1671 1672 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1673 if (!xfs_ifork_zone) 1674 goto out_destroy_da_state_zone; 1675 1676 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1677 if (!xfs_trans_zone) 1678 goto out_destroy_ifork_zone; 1679 1680 xfs_log_item_desc_zone = 1681 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1682 "xfs_log_item_desc"); 1683 if (!xfs_log_item_desc_zone) 1684 goto out_destroy_trans_zone; 1685 1686 /* 1687 * The size of the zone allocated buf log item is the maximum 1688 * size possible under XFS. This wastes a little bit of memory, 1689 * but it is much faster. 1690 */ 1691 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1692 "xfs_buf_item"); 1693 if (!xfs_buf_item_zone) 1694 goto out_destroy_log_item_desc_zone; 1695 1696 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1697 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1698 sizeof(xfs_extent_t))), "xfs_efd_item"); 1699 if (!xfs_efd_zone) 1700 goto out_destroy_buf_item_zone; 1701 1702 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1703 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1704 sizeof(xfs_extent_t))), "xfs_efi_item"); 1705 if (!xfs_efi_zone) 1706 goto out_destroy_efd_zone; 1707 1708 xfs_inode_zone = 1709 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1710 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1711 xfs_fs_inode_init_once); 1712 if (!xfs_inode_zone) 1713 goto out_destroy_efi_zone; 1714 1715 xfs_ili_zone = 1716 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1717 KM_ZONE_SPREAD, NULL); 1718 if (!xfs_ili_zone) 1719 goto out_destroy_inode_zone; 1720 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), 1721 "xfs_icr"); 1722 if (!xfs_icreate_zone) 1723 goto out_destroy_ili_zone; 1724 1725 return 0; 1726 1727 out_destroy_ili_zone: 1728 kmem_zone_destroy(xfs_ili_zone); 1729 out_destroy_inode_zone: 1730 kmem_zone_destroy(xfs_inode_zone); 1731 out_destroy_efi_zone: 1732 kmem_zone_destroy(xfs_efi_zone); 1733 out_destroy_efd_zone: 1734 kmem_zone_destroy(xfs_efd_zone); 1735 out_destroy_buf_item_zone: 1736 kmem_zone_destroy(xfs_buf_item_zone); 1737 out_destroy_log_item_desc_zone: 1738 kmem_zone_destroy(xfs_log_item_desc_zone); 1739 out_destroy_trans_zone: 1740 kmem_zone_destroy(xfs_trans_zone); 1741 out_destroy_ifork_zone: 1742 kmem_zone_destroy(xfs_ifork_zone); 1743 out_destroy_da_state_zone: 1744 kmem_zone_destroy(xfs_da_state_zone); 1745 out_destroy_btree_cur_zone: 1746 kmem_zone_destroy(xfs_btree_cur_zone); 1747 out_destroy_bmap_free_item_zone: 1748 kmem_zone_destroy(xfs_bmap_free_item_zone); 1749 out_destroy_log_ticket_zone: 1750 kmem_zone_destroy(xfs_log_ticket_zone); 1751 out_destroy_ioend_pool: 1752 mempool_destroy(xfs_ioend_pool); 1753 out_destroy_ioend_zone: 1754 kmem_zone_destroy(xfs_ioend_zone); 1755 out: 1756 return -ENOMEM; 1757 } 1758 1759 STATIC void 1760 xfs_destroy_zones(void) 1761 { 1762 /* 1763 * Make sure all delayed rcu free are flushed before we 1764 * destroy caches. 1765 */ 1766 rcu_barrier(); 1767 kmem_zone_destroy(xfs_icreate_zone); 1768 kmem_zone_destroy(xfs_ili_zone); 1769 kmem_zone_destroy(xfs_inode_zone); 1770 kmem_zone_destroy(xfs_efi_zone); 1771 kmem_zone_destroy(xfs_efd_zone); 1772 kmem_zone_destroy(xfs_buf_item_zone); 1773 kmem_zone_destroy(xfs_log_item_desc_zone); 1774 kmem_zone_destroy(xfs_trans_zone); 1775 kmem_zone_destroy(xfs_ifork_zone); 1776 kmem_zone_destroy(xfs_da_state_zone); 1777 kmem_zone_destroy(xfs_btree_cur_zone); 1778 kmem_zone_destroy(xfs_bmap_free_item_zone); 1779 kmem_zone_destroy(xfs_log_ticket_zone); 1780 mempool_destroy(xfs_ioend_pool); 1781 kmem_zone_destroy(xfs_ioend_zone); 1782 1783 } 1784 1785 STATIC int __init 1786 xfs_init_workqueues(void) 1787 { 1788 /* 1789 * The allocation workqueue can be used in memory reclaim situations 1790 * (writepage path), and parallelism is only limited by the number of 1791 * AGs in all the filesystems mounted. Hence use the default large 1792 * max_active value for this workqueue. 1793 */ 1794 xfs_alloc_wq = alloc_workqueue("xfsalloc", 1795 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0); 1796 if (!xfs_alloc_wq) 1797 return -ENOMEM; 1798 1799 return 0; 1800 } 1801 1802 STATIC void 1803 xfs_destroy_workqueues(void) 1804 { 1805 destroy_workqueue(xfs_alloc_wq); 1806 } 1807 1808 STATIC int __init 1809 init_xfs_fs(void) 1810 { 1811 int error; 1812 1813 printk(KERN_INFO XFS_VERSION_STRING " with " 1814 XFS_BUILD_OPTIONS " enabled\n"); 1815 1816 xfs_dir_startup(); 1817 1818 error = xfs_init_zones(); 1819 if (error) 1820 goto out; 1821 1822 error = xfs_init_workqueues(); 1823 if (error) 1824 goto out_destroy_zones; 1825 1826 error = xfs_mru_cache_init(); 1827 if (error) 1828 goto out_destroy_wq; 1829 1830 error = xfs_buf_init(); 1831 if (error) 1832 goto out_mru_cache_uninit; 1833 1834 error = xfs_init_procfs(); 1835 if (error) 1836 goto out_buf_terminate; 1837 1838 error = xfs_sysctl_register(); 1839 if (error) 1840 goto out_cleanup_procfs; 1841 1842 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); 1843 if (!xfs_kset) { 1844 error = -ENOMEM; 1845 goto out_sysctl_unregister;; 1846 } 1847 1848 #ifdef DEBUG 1849 xfs_dbg_kobj.kobject.kset = xfs_kset; 1850 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug"); 1851 if (error) 1852 goto out_kset_unregister; 1853 #endif 1854 1855 error = xfs_qm_init(); 1856 if (error) 1857 goto out_remove_kobj; 1858 1859 error = register_filesystem(&xfs_fs_type); 1860 if (error) 1861 goto out_qm_exit; 1862 return 0; 1863 1864 out_qm_exit: 1865 xfs_qm_exit(); 1866 out_remove_kobj: 1867 #ifdef DEBUG 1868 xfs_sysfs_del(&xfs_dbg_kobj); 1869 out_kset_unregister: 1870 #endif 1871 kset_unregister(xfs_kset); 1872 out_sysctl_unregister: 1873 xfs_sysctl_unregister(); 1874 out_cleanup_procfs: 1875 xfs_cleanup_procfs(); 1876 out_buf_terminate: 1877 xfs_buf_terminate(); 1878 out_mru_cache_uninit: 1879 xfs_mru_cache_uninit(); 1880 out_destroy_wq: 1881 xfs_destroy_workqueues(); 1882 out_destroy_zones: 1883 xfs_destroy_zones(); 1884 out: 1885 return error; 1886 } 1887 1888 STATIC void __exit 1889 exit_xfs_fs(void) 1890 { 1891 xfs_qm_exit(); 1892 unregister_filesystem(&xfs_fs_type); 1893 #ifdef DEBUG 1894 xfs_sysfs_del(&xfs_dbg_kobj); 1895 #endif 1896 kset_unregister(xfs_kset); 1897 xfs_sysctl_unregister(); 1898 xfs_cleanup_procfs(); 1899 xfs_buf_terminate(); 1900 xfs_mru_cache_uninit(); 1901 xfs_destroy_workqueues(); 1902 xfs_destroy_zones(); 1903 } 1904 1905 module_init(init_xfs_fs); 1906 module_exit(exit_xfs_fs); 1907 1908 MODULE_AUTHOR("Silicon Graphics, Inc."); 1909 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1910 MODULE_LICENSE("GPL"); 1911