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