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