fs/xfs/linux-2.6/xfs_super.c

   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 #include "xfs.h"
  19 #include "xfs_bit.h"
  20 #include "xfs_log.h"
  21 #include "xfs_inum.h"
  22 #include "xfs_trans.h"
  23 #include "xfs_sb.h"
  24 #include "xfs_ag.h"
  25 #include "xfs_dir2.h"
  26 #include "xfs_alloc.h"
  27 #include "xfs_dmapi.h"
  28 #include "xfs_quota.h"
  29 #include "xfs_mount.h"
  30 #include "xfs_bmap_btree.h"
  31 #include "xfs_alloc_btree.h"
  32 #include "xfs_ialloc_btree.h"
  33 #include "xfs_dir2_sf.h"
  34 #include "xfs_attr_sf.h"
  35 #include "xfs_dinode.h"
  36 #include "xfs_inode.h"
  37 #include "xfs_btree.h"
  38 #include "xfs_btree_trace.h"
  39 #include "xfs_ialloc.h"
  40 #include "xfs_bmap.h"
  41 #include "xfs_rtalloc.h"
  42 #include "xfs_error.h"
  43 #include "xfs_itable.h"
  44 #include "xfs_fsops.h"
  45 #include "xfs_rw.h"
  46 #include "xfs_acl.h"
  47 #include "xfs_attr.h"
  48 #include "xfs_buf_item.h"
  49 #include "xfs_utils.h"
  50 #include "xfs_vnodeops.h"
  51 #include "xfs_version.h"
  52 #include "xfs_log_priv.h"
  53 #include "xfs_trans_priv.h"
  54 #include "xfs_filestream.h"
  55 #include "xfs_da_btree.h"
  56 #include "xfs_dir2_trace.h"
  57 #include "xfs_extfree_item.h"
  58 #include "xfs_mru_cache.h"
  59 #include "xfs_inode_item.h"
  60 #include "xfs_sync.h"
  61
  62 #include <linux/namei.h>
  63 #include <linux/init.h>
  64 #include <linux/mount.h>
  65 #include <linux/mempool.h>
  66 #include <linux/writeback.h>
  67 #include <linux/kthread.h>
  68 #include <linux/freezer.h>
  69 #include <linux/parser.h>
  70
  71 static struct quotactl_ops xfs_quotactl_operations;
  72 static struct super_operations xfs_super_operations;
  73 static kmem_zone_t *xfs_ioend_zone;
  74 mempool_t *xfs_ioend_pool;
  75
  76 #define MNTOPT_LOGBUFS  "logbufs"       /* number of XFS log buffers */
  77 #define MNTOPT_LOGBSIZE "logbsize"      /* size of XFS log buffers */
  78 #define MNTOPT_LOGDEV   "logdev"        /* log device */
  79 #define MNTOPT_RTDEV    "rtdev"         /* realtime I/O device */
  80 #define MNTOPT_BIOSIZE  "biosize"       /* log2 of preferred buffered io size */
  81 #define MNTOPT_WSYNC    "wsync"         /* safe-mode nfs compatible mount */
  82 #define MNTOPT_INO64    "ino64"         /* force inodes into 64-bit range */
  83 #define MNTOPT_NOALIGN  "noalign"       /* turn off stripe alignment */
  84 #define MNTOPT_SWALLOC  "swalloc"       /* turn on stripe width allocation */
  85 #define MNTOPT_SUNIT    "sunit"         /* data volume stripe unit */
  86 #define MNTOPT_SWIDTH   "swidth"        /* data volume stripe width */
  87 #define MNTOPT_NOUUID   "nouuid"        /* ignore filesystem UUID */
  88 #define MNTOPT_MTPT     "mtpt"          /* filesystem mount point */
  89 #define MNTOPT_GRPID    "grpid"         /* group-ID from parent directory */
  90 #define MNTOPT_NOGRPID  "nogrpid"       /* group-ID from current process */
  91 #define MNTOPT_BSDGROUPS    "bsdgroups"    /* group-ID from parent directory */
  92 #define MNTOPT_SYSVGROUPS   "sysvgroups"   /* group-ID from current process */
  93 #define MNTOPT_ALLOCSIZE    "allocsize"    /* preferred allocation size */
  94 #define MNTOPT_NORECOVERY   "norecovery"   /* don't run XFS recovery */
  95 #define MNTOPT_BARRIER  "barrier"       /* use writer barriers for log write and
  96                                          * unwritten extent conversion */
  97 #define MNTOPT_NOBARRIER "nobarrier"    /* .. disable */
  98 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
  99 #define MNTOPT_64BITINODE   "inode64"   /* inodes can be allocated anywhere */
 100 #define MNTOPT_IKEEP    "ikeep"         /* do not free empty inode clusters */
 101 #define MNTOPT_NOIKEEP  "noikeep"       /* free empty inode clusters */
 102 #define MNTOPT_LARGEIO     "largeio"    /* report large I/O sizes in stat() */
 103 #define MNTOPT_NOLARGEIO   "nolargeio"  /* do not report large I/O sizes
 104                                          * in stat(). */
 105 #define MNTOPT_ATTR2    "attr2"         /* do use attr2 attribute format */
 106 #define MNTOPT_NOATTR2  "noattr2"       /* do not use attr2 attribute format */
 107 #define MNTOPT_FILESTREAM  "filestreams" /* use filestreams allocator */
 108 #define MNTOPT_QUOTA    "quota"         /* disk quotas (user) */
 109 #define MNTOPT_NOQUOTA  "noquota"       /* no quotas */
 110 #define MNTOPT_USRQUOTA "usrquota"      /* user quota enabled */
 111 #define MNTOPT_GRPQUOTA "grpquota"      /* group quota enabled */
 112 #define MNTOPT_PRJQUOTA "prjquota"      /* project quota enabled */
 113 #define MNTOPT_UQUOTA   "uquota"        /* user quota (IRIX variant) */
 114 #define MNTOPT_GQUOTA   "gquota"        /* group quota (IRIX variant) */
 115 #define MNTOPT_PQUOTA   "pquota"        /* project quota (IRIX variant) */
 116 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
 117 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
 118 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
 119 #define MNTOPT_QUOTANOENF  "qnoenforce" /* same as uqnoenforce */
 120 #define MNTOPT_DMAPI    "dmapi"         /* DMI enabled (DMAPI / XDSM) */
 121 #define MNTOPT_XDSM     "xdsm"          /* DMI enabled (DMAPI / XDSM) */
 122 #define MNTOPT_DMI      "dmi"           /* DMI enabled (DMAPI / XDSM) */
 123
 124 /*
 125  * Table driven mount option parser.
 126  *
 127  * Currently only used for remount, but it will be used for mount
 128  * in the future, too.
 129  */
 130 enum {
 131         Opt_barrier, Opt_nobarrier, Opt_err
 132 };
 133
 134 static const match_table_t tokens = {
 135         {Opt_barrier, "barrier"},
 136         {Opt_nobarrier, "nobarrier"},
 137         {Opt_err, NULL}
 138 };
 139
 140
 141 STATIC unsigned long
 142 suffix_strtoul(char *s, char **endp, unsigned int base)
 143 {
 144         int     last, shift_left_factor = 0;
 145         char    *value = s;
 146
 147         last = strlen(value) - 1;
 148         if (value[last] == 'K' || value[last] == 'k') {
 149                 shift_left_factor = 10;
 150                 value[last] = '\0';
 151         }
 152         if (value[last] == 'M' || value[last] == 'm') {
 153                 shift_left_factor = 20;
 154                 value[last] = '\0';
 155         }
 156         if (value[last] == 'G' || value[last] == 'g') {
 157                 shift_left_factor = 30;
 158                 value[last] = '\0';
 159         }
 160
 161         return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
 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  */
 171 STATIC int
 172 xfs_parseargs(
 173         struct xfs_mount        *mp,
 174         char                    *options,
 175         char                    **mtpt)
 176 {
 177         struct super_block      *sb = mp->m_super;
 178         char                    *this_char, *value, *eov;
 179         int                     dsunit = 0;
 180         int                     dswidth = 0;
 181         int                     iosize = 0;
 182         int                     dmapi_implies_ikeep = 1;
 183         uchar_t                 iosizelog = 0;
 184
 185         /*
 186          * Copy binary VFS mount flags we are interested in.
 187          */
 188         if (sb->s_flags & MS_RDONLY)
 189                 mp->m_flags |= XFS_MOUNT_RDONLY;
 190         if (sb->s_flags & MS_DIRSYNC)
 191                 mp->m_flags |= XFS_MOUNT_DIRSYNC;
 192         if (sb->s_flags & MS_SYNCHRONOUS)
 193                 mp->m_flags |= XFS_MOUNT_WSYNC;
 194
 195         /*
 196          * Set some default flags that could be cleared by the mount option
 197          * parsing.
 198          */
 199         mp->m_flags |= XFS_MOUNT_BARRIER;
 200         mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
 201         mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
 202
 203         /*
 204          * These can be overridden by the mount option parsing.
 205          */
 206         mp->m_logbufs = -1;
 207         mp->m_logbsize = -1;
 208
 209         if (!options)
 210                 goto done;
 211
 212         while ((this_char = strsep(&options, ",")) != NULL) {
 213                 if (!*this_char)
 214                         continue;
 215                 if ((value = strchr(this_char, '=')) != NULL)
 216                         *value++ = 0;
 217
 218                 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
 219                         if (!value || !*value) {
 220                                 cmn_err(CE_WARN,
 221                                         "XFS: %s option requires an argument",
 222                                         this_char);
 223                                 return EINVAL;
 224                         }
 225                         mp->m_logbufs = simple_strtoul(value, &eov, 10);
 226                 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
 227                         if (!value || !*value) {
 228                                 cmn_err(CE_WARN,
 229                                         "XFS: %s option requires an argument",
 230                                         this_char);
 231                                 return EINVAL;
 232                         }
 233                         mp->m_logbsize = suffix_strtoul(value, &eov, 10);
 234                 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
 235                         if (!value || !*value) {
 236                                 cmn_err(CE_WARN,
 237                                         "XFS: %s option requires an argument",
 238                                         this_char);
 239                                 return EINVAL;
 240                         }
 241                         mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
 242                         if (!mp->m_logname)
 243                                 return ENOMEM;
 244                 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
 245                         if (!value || !*value) {
 246                                 cmn_err(CE_WARN,
 247                                         "XFS: %s option requires an argument",
 248                                         this_char);
 249                                 return EINVAL;
 250                         }
 251                         *mtpt = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
 252                         if (!*mtpt)
 253                                 return ENOMEM;
 254                 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
 255                         if (!value || !*value) {
 256                                 cmn_err(CE_WARN,
 257                                         "XFS: %s option requires an argument",
 258                                         this_char);
 259                                 return EINVAL;
 260                         }
 261                         mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
 262                         if (!mp->m_rtname)
 263                                 return ENOMEM;
 264                 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
 265                         if (!value || !*value) {
 266                                 cmn_err(CE_WARN,
 267                                         "XFS: %s option requires an argument",
 268                                         this_char);
 269                                 return EINVAL;
 270                         }
 271                         iosize = simple_strtoul(value, &eov, 10);
 272                         iosizelog = ffs(iosize) - 1;
 273                 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
 274                         if (!value || !*value) {
 275                                 cmn_err(CE_WARN,
 276                                         "XFS: %s option requires an argument",
 277                                         this_char);
 278                                 return EINVAL;
 279                         }
 280                         iosize = suffix_strtoul(value, &eov, 10);
 281                         iosizelog = ffs(iosize) - 1;
 282                 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
 283                            !strcmp(this_char, MNTOPT_BSDGROUPS)) {
 284                         mp->m_flags |= XFS_MOUNT_GRPID;
 285                 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
 286                            !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
 287                         mp->m_flags &= ~XFS_MOUNT_GRPID;
 288                 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
 289                         mp->m_flags |= XFS_MOUNT_WSYNC;
 290                 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
 291                         mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
 292                 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
 293                         mp->m_flags |= XFS_MOUNT_NORECOVERY;
 294                 } else if (!strcmp(this_char, MNTOPT_INO64)) {
 295 #if XFS_BIG_INUMS
 296                         mp->m_flags |= XFS_MOUNT_INO64;
 297                         mp->m_inoadd = XFS_INO64_OFFSET;
 298 #else
 299                         cmn_err(CE_WARN,
 300                                 "XFS: %s option not allowed on this system",
 301                                 this_char);
 302                         return EINVAL;
 303 #endif
 304                 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
 305                         mp->m_flags |= XFS_MOUNT_NOALIGN;
 306                 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
 307                         mp->m_flags |= XFS_MOUNT_SWALLOC;
 308                 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
 309                         if (!value || !*value) {
 310                                 cmn_err(CE_WARN,
 311                                         "XFS: %s option requires an argument",
 312                                         this_char);
 313                                 return EINVAL;
 314                         }
 315                         dsunit = simple_strtoul(value, &eov, 10);
 316                 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
 317                         if (!value || !*value) {
 318                                 cmn_err(CE_WARN,
 319                                         "XFS: %s option requires an argument",
 320                                         this_char);
 321                                 return EINVAL;
 322                         }
 323                         dswidth = simple_strtoul(value, &eov, 10);
 324                 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
 325                         mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
 326 #if !XFS_BIG_INUMS
 327                         cmn_err(CE_WARN,
 328                                 "XFS: %s option not allowed on this system",
 329                                 this_char);
 330                         return EINVAL;
 331 #endif
 332                 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
 333                         mp->m_flags |= XFS_MOUNT_NOUUID;
 334                 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
 335                         mp->m_flags |= XFS_MOUNT_BARRIER;
 336                 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
 337                         mp->m_flags &= ~XFS_MOUNT_BARRIER;
 338                 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
 339                         mp->m_flags |= XFS_MOUNT_IKEEP;
 340                 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
 341                         dmapi_implies_ikeep = 0;
 342                         mp->m_flags &= ~XFS_MOUNT_IKEEP;
 343                 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
 344                         mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
 345                 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
 346                         mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
 347                 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
 348                         mp->m_flags |= XFS_MOUNT_ATTR2;
 349                 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
 350                         mp->m_flags &= ~XFS_MOUNT_ATTR2;
 351                         mp->m_flags |= XFS_MOUNT_NOATTR2;
 352                 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
 353                         mp->m_flags |= XFS_MOUNT_FILESTREAMS;
 354                 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
 355                         mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
 356                                           XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
 357                                           XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
 358                                           XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
 359                 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
 360                            !strcmp(this_char, MNTOPT_UQUOTA) ||
 361                            !strcmp(this_char, MNTOPT_USRQUOTA)) {
 362                         mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
 363                                          XFS_UQUOTA_ENFD);
 364                 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
 365                            !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
 366                         mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
 367                         mp->m_qflags &= ~XFS_UQUOTA_ENFD;
 368                 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
 369                            !strcmp(this_char, MNTOPT_PRJQUOTA)) {
 370                         mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
 371                                          XFS_OQUOTA_ENFD);
 372                 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
 373                         mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
 374                         mp->m_qflags &= ~XFS_OQUOTA_ENFD;
 375                 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
 376                            !strcmp(this_char, MNTOPT_GRPQUOTA)) {
 377                         mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
 378                                          XFS_OQUOTA_ENFD);
 379                 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
 380                         mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
 381                         mp->m_qflags &= ~XFS_OQUOTA_ENFD;
 382                 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
 383                         mp->m_flags |= XFS_MOUNT_DMAPI;
 384                 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
 385                         mp->m_flags |= XFS_MOUNT_DMAPI;
 386                 } else if (!strcmp(this_char, MNTOPT_DMI)) {
 387                         mp->m_flags |= XFS_MOUNT_DMAPI;
 388                 } else if (!strcmp(this_char, "ihashsize")) {
 389                         cmn_err(CE_WARN,
 390         "XFS: ihashsize no longer used, option is deprecated.");
 391                 } else if (!strcmp(this_char, "osyncisdsync")) {
 392                         /* no-op, this is now the default */
 393                         cmn_err(CE_WARN,
 394         "XFS: osyncisdsync is now the default, option is deprecated.");
 395                 } else if (!strcmp(this_char, "irixsgid")) {
 396                         cmn_err(CE_WARN,
 397         "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
 398                 } else {
 399                         cmn_err(CE_WARN,
 400                                 "XFS: unknown mount option [%s].", this_char);
 401                         return EINVAL;
 402                 }
 403         }
 404
 405         /*
 406          * no recovery flag requires a read-only mount
 407          */
 408         if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
 409             !(mp->m_flags & XFS_MOUNT_RDONLY)) {
 410                 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
 411                 return EINVAL;
 412         }
 413
 414         if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
 415                 cmn_err(CE_WARN,
 416         "XFS: sunit and swidth options incompatible with the noalign option");
 417                 return EINVAL;
 418         }
 419
 420         if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
 421             (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
 422                 cmn_err(CE_WARN,
 423                         "XFS: cannot mount with both project and group quota");
 424                 return EINVAL;
 425         }
 426
 427         if ((mp->m_flags & XFS_MOUNT_DMAPI) && (!*mtpt || *mtpt[0] == '\0')) {
 428                 printk("XFS: %s option needs the mount point option as well\n",
 429                         MNTOPT_DMAPI);
 430                 return EINVAL;
 431         }
 432
 433         if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
 434                 cmn_err(CE_WARN,
 435                         "XFS: sunit and swidth must be specified together");
 436                 return EINVAL;
 437         }
 438
 439         if (dsunit && (dswidth % dsunit != 0)) {
 440                 cmn_err(CE_WARN,
 441         "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
 442                         dswidth, dsunit);
 443                 return EINVAL;
 444         }
 445
 446         /*
 447          * Applications using DMI filesystems often expect the
 448          * inode generation number to be monotonically increasing.
 449          * If we delete inode chunks we break this assumption, so
 450          * keep unused inode chunks on disk for DMI filesystems
 451          * until we come up with a better solution.
 452          * Note that if "ikeep" or "noikeep" mount options are
 453          * supplied, then they are honored.
 454          */
 455         if ((mp->m_flags & XFS_MOUNT_DMAPI) && dmapi_implies_ikeep)
 456                 mp->m_flags |= XFS_MOUNT_IKEEP;
 457
 458 done:
 459         if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
 460                 /*
 461                  * At this point the superblock has not been read
 462                  * in, therefore we do not know the block size.
 463                  * Before the mount call ends we will convert
 464                  * these to FSBs.
 465                  */
 466                 if (dsunit) {
 467                         mp->m_dalign = dsunit;
 468                         mp->m_flags |= XFS_MOUNT_RETERR;
 469                 }
 470
 471                 if (dswidth)
 472                         mp->m_swidth = dswidth;
 473         }
 474
 475         if (mp->m_logbufs != -1 &&
 476             mp->m_logbufs != 0 &&
 477             (mp->m_logbufs < XLOG_MIN_ICLOGS ||
 478              mp->m_logbufs > XLOG_MAX_ICLOGS)) {
 479                 cmn_err(CE_WARN,
 480                         "XFS: invalid logbufs value: %d [not %d-%d]",
 481                         mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
 482                 return XFS_ERROR(EINVAL);
 483         }
 484         if (mp->m_logbsize != -1 &&
 485             mp->m_logbsize !=  0 &&
 486             (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
 487              mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
 488              !is_power_of_2(mp->m_logbsize))) {
 489                 cmn_err(CE_WARN,
 490         "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
 491                         mp->m_logbsize);
 492                 return XFS_ERROR(EINVAL);
 493         }
 494
 495         mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
 496         if (!mp->m_fsname)
 497                 return ENOMEM;
 498         mp->m_fsname_len = strlen(mp->m_fsname) + 1;
 499
 500         if (iosizelog) {
 501                 if (iosizelog > XFS_MAX_IO_LOG ||
 502                     iosizelog < XFS_MIN_IO_LOG) {
 503                         cmn_err(CE_WARN,
 504                 "XFS: invalid log iosize: %d [not %d-%d]",
 505                                 iosizelog, XFS_MIN_IO_LOG,
 506                                 XFS_MAX_IO_LOG);
 507                         return XFS_ERROR(EINVAL);
 508                 }
 509
 510                 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
 511                 mp->m_readio_log = iosizelog;
 512                 mp->m_writeio_log = iosizelog;
 513         }
 514
 515         return 0;
 516 }
 517
 518 struct proc_xfs_info {
 519         int     flag;
 520         char    *str;
 521 };
 522
 523 STATIC int
 524 xfs_showargs(
 525         struct xfs_mount        *mp,
 526         struct seq_file         *m)
 527 {
 528         static struct proc_xfs_info xfs_info_set[] = {
 529                 /* the few simple ones we can get from the mount struct */
 530                 { XFS_MOUNT_IKEEP,              "," MNTOPT_IKEEP },
 531                 { XFS_MOUNT_WSYNC,              "," MNTOPT_WSYNC },
 532                 { XFS_MOUNT_INO64,              "," MNTOPT_INO64 },
 533                 { XFS_MOUNT_NOALIGN,            "," MNTOPT_NOALIGN },
 534                 { XFS_MOUNT_SWALLOC,            "," MNTOPT_SWALLOC },
 535                 { XFS_MOUNT_NOUUID,             "," MNTOPT_NOUUID },
 536                 { XFS_MOUNT_NORECOVERY,         "," MNTOPT_NORECOVERY },
 537                 { XFS_MOUNT_OSYNCISOSYNC,       "," MNTOPT_OSYNCISOSYNC },
 538                 { XFS_MOUNT_ATTR2,              "," MNTOPT_ATTR2 },
 539                 { XFS_MOUNT_FILESTREAMS,        "," MNTOPT_FILESTREAM },
 540                 { XFS_MOUNT_DMAPI,              "," MNTOPT_DMAPI },
 541                 { XFS_MOUNT_GRPID,              "," MNTOPT_GRPID },
 542                 { 0, NULL }
 543         };
 544         static struct proc_xfs_info xfs_info_unset[] = {
 545                 /* the few simple ones we can get from the mount struct */
 546                 { XFS_MOUNT_COMPAT_IOSIZE,      "," MNTOPT_LARGEIO },
 547                 { XFS_MOUNT_BARRIER,            "," MNTOPT_NOBARRIER },
 548                 { XFS_MOUNT_SMALL_INUMS,        "," MNTOPT_64BITINODE },
 549                 { 0, NULL }
 550         };
 551         struct proc_xfs_info    *xfs_infop;
 552
 553         for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
 554                 if (mp->m_flags & xfs_infop->flag)
 555                         seq_puts(m, xfs_infop->str);
 556         }
 557         for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
 558                 if (!(mp->m_flags & xfs_infop->flag))
 559                         seq_puts(m, xfs_infop->str);
 560         }
 561
 562         if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
 563                 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
 564                                 (int)(1 << mp->m_writeio_log) >> 10);
 565
 566         if (mp->m_logbufs > 0)
 567                 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
 568         if (mp->m_logbsize > 0)
 569                 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
 570
 571         if (mp->m_logname)
 572                 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
 573         if (mp->m_rtname)
 574                 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
 575
 576         if (mp->m_dalign > 0)
 577                 seq_printf(m, "," MNTOPT_SUNIT "=%d",
 578                                 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
 579         if (mp->m_swidth > 0)
 580                 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
 581                                 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
 582
 583         if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
 584                 seq_puts(m, "," MNTOPT_USRQUOTA);
 585         else if (mp->m_qflags & XFS_UQUOTA_ACCT)
 586                 seq_puts(m, "," MNTOPT_UQUOTANOENF);
 587
 588         if (mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
 589                 seq_puts(m, "," MNTOPT_PRJQUOTA);
 590         else if (mp->m_qflags & XFS_PQUOTA_ACCT)
 591                 seq_puts(m, "," MNTOPT_PQUOTANOENF);
 592
 593         if (mp->m_qflags & (XFS_GQUOTA_ACCT|XFS_OQUOTA_ENFD))
 594                 seq_puts(m, "," MNTOPT_GRPQUOTA);
 595         else if (mp->m_qflags & XFS_GQUOTA_ACCT)
 596                 seq_puts(m, "," MNTOPT_GQUOTANOENF);
 597
 598         if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
 599                 seq_puts(m, "," MNTOPT_NOQUOTA);
 600
 601         return 0;
 602 }
 603 __uint64_t
 604 xfs_max_file_offset(
 605         unsigned int            blockshift)
 606 {
 607         unsigned int            pagefactor = 1;
 608         unsigned int            bitshift = BITS_PER_LONG - 1;
 609
 610         /* Figure out maximum filesize, on Linux this can depend on
 611          * the filesystem blocksize (on 32 bit platforms).
 612          * __block_prepare_write does this in an [unsigned] long...
 613          *      page->index << (PAGE_CACHE_SHIFT - bbits)
 614          * So, for page sized blocks (4K on 32 bit platforms),
 615          * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
 616          *      (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
 617          * but for smaller blocksizes it is less (bbits = log2 bsize).
 618          * Note1: get_block_t takes a long (implicit cast from above)
 619          * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
 620          * can optionally convert the [unsigned] long from above into
 621          * an [unsigned] long long.
 622          */
 623
 624 #if BITS_PER_LONG == 32
 625 # if defined(CONFIG_LBD)
 626         ASSERT(sizeof(sector_t) == 8);
 627         pagefactor = PAGE_CACHE_SIZE;
 628         bitshift = BITS_PER_LONG;
 629 # else
 630         pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
 631 # endif
 632 #endif
 633
 634         return (((__uint64_t)pagefactor) << bitshift) - 1;
 635 }
 636
 637 int
 638 xfs_blkdev_get(
 639         xfs_mount_t             *mp,
 640         const char              *name,
 641         struct block_device     **bdevp)
 642 {
 643         int                     error = 0;
 644
 645         *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
 646         if (IS_ERR(*bdevp)) {
 647                 error = PTR_ERR(*bdevp);
 648                 printk("XFS: Invalid device [%s], error=%d\n", name, error);
 649         }
 650
 651         return -error;
 652 }
 653
 654 void
 655 xfs_blkdev_put(
 656         struct block_device     *bdev)
 657 {
 658         if (bdev)
 659                 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
 660 }
 661
 662 /*
 663  * Try to write out the superblock using barriers.
 664  */
 665 STATIC int
 666 xfs_barrier_test(
 667         xfs_mount_t     *mp)
 668 {
 669         xfs_buf_t       *sbp = xfs_getsb(mp, 0);
 670         int             error;
 671
 672         XFS_BUF_UNDONE(sbp);
 673         XFS_BUF_UNREAD(sbp);
 674         XFS_BUF_UNDELAYWRITE(sbp);
 675         XFS_BUF_WRITE(sbp);
 676         XFS_BUF_UNASYNC(sbp);
 677         XFS_BUF_ORDERED(sbp);
 678
 679         xfsbdstrat(mp, sbp);
 680         error = xfs_iowait(sbp);
 681
 682         /*
 683          * Clear all the flags we set and possible error state in the
 684          * buffer.  We only did the write to try out whether barriers
 685          * worked and shouldn't leave any traces in the superblock
 686          * buffer.
 687          */
 688         XFS_BUF_DONE(sbp);
 689         XFS_BUF_ERROR(sbp, 0);
 690         XFS_BUF_UNORDERED(sbp);
 691
 692         xfs_buf_relse(sbp);
 693         return error;
 694 }
 695
 696 void
 697 xfs_mountfs_check_barriers(xfs_mount_t *mp)
 698 {
 699         int error;
 700
 701         if (mp->m_logdev_targp != mp->m_ddev_targp) {
 702                 xfs_fs_cmn_err(CE_NOTE, mp,
 703                   "Disabling barriers, not supported with external log device");
 704                 mp->m_flags &= ~XFS_MOUNT_BARRIER;
 705                 return;
 706         }
 707
 708         if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
 709                 xfs_fs_cmn_err(CE_NOTE, mp,
 710                   "Disabling barriers, underlying device is readonly");
 711                 mp->m_flags &= ~XFS_MOUNT_BARRIER;
 712                 return;
 713         }
 714
 715         error = xfs_barrier_test(mp);
 716         if (error) {
 717                 xfs_fs_cmn_err(CE_NOTE, mp,
 718                   "Disabling barriers, trial barrier write failed");
 719                 mp->m_flags &= ~XFS_MOUNT_BARRIER;
 720                 return;
 721         }
 722 }
 723
 724 void
 725 xfs_blkdev_issue_flush(
 726         xfs_buftarg_t           *buftarg)
 727 {
 728         blkdev_issue_flush(buftarg->bt_bdev, NULL);
 729 }
 730
 731 STATIC void
 732 xfs_close_devices(
 733         struct xfs_mount        *mp)
 734 {
 735         if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
 736                 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
 737                 xfs_free_buftarg(mp, mp->m_logdev_targp);
 738                 xfs_blkdev_put(logdev);
 739         }
 740         if (mp->m_rtdev_targp) {
 741                 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
 742                 xfs_free_buftarg(mp, mp->m_rtdev_targp);
 743                 xfs_blkdev_put(rtdev);
 744         }
 745         xfs_free_buftarg(mp, mp->m_ddev_targp);
 746 }
 747
 748 /*
 749  * The file system configurations are:
 750  *      (1) device (partition) with data and internal log
 751  *      (2) logical volume with data and log subvolumes.
 752  *      (3) logical volume with data, log, and realtime subvolumes.
 753  *
 754  * We only have to handle opening the log and realtime volumes here if
 755  * they are present.  The data subvolume has already been opened by
 756  * get_sb_bdev() and is stored in sb->s_bdev.
 757  */
 758 STATIC int
 759 xfs_open_devices(
 760         struct xfs_mount        *mp)
 761 {
 762         struct block_device     *ddev = mp->m_super->s_bdev;
 763         struct block_device     *logdev = NULL, *rtdev = NULL;
 764         int                     error;
 765
 766         /*
 767          * Open real time and log devices - order is important.
 768          */
 769         if (mp->m_logname) {
 770                 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
 771                 if (error)
 772                         goto out;
 773         }
 774
 775         if (mp->m_rtname) {
 776                 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
 777                 if (error)
 778                         goto out_close_logdev;
 779
 780                 if (rtdev == ddev || rtdev == logdev) {
 781                         cmn_err(CE_WARN,
 782         "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
 783                         error = EINVAL;
 784                         goto out_close_rtdev;
 785                 }
 786         }
 787
 788         /*
 789          * Setup xfs_mount buffer target pointers
 790          */
 791         error = ENOMEM;
 792         mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
 793         if (!mp->m_ddev_targp)
 794                 goto out_close_rtdev;
 795
 796         if (rtdev) {
 797                 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
 798                 if (!mp->m_rtdev_targp)
 799                         goto out_free_ddev_targ;
 800         }
 801
 802         if (logdev && logdev != ddev) {
 803                 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
 804                 if (!mp->m_logdev_targp)
 805                         goto out_free_rtdev_targ;
 806         } else {
 807                 mp->m_logdev_targp = mp->m_ddev_targp;
 808         }
 809
 810         return 0;
 811
 812  out_free_rtdev_targ:
 813         if (mp->m_rtdev_targp)
 814                 xfs_free_buftarg(mp, mp->m_rtdev_targp);
 815  out_free_ddev_targ:
 816         xfs_free_buftarg(mp, mp->m_ddev_targp);
 817  out_close_rtdev:
 818         if (rtdev)
 819                 xfs_blkdev_put(rtdev);
 820  out_close_logdev:
 821         if (logdev && logdev != ddev)
 822                 xfs_blkdev_put(logdev);
 823  out:
 824         return error;
 825 }
 826
 827 /*
 828  * Setup xfs_mount buffer target pointers based on superblock
 829  */
 830 STATIC int
 831 xfs_setup_devices(
 832         struct xfs_mount        *mp)
 833 {
 834         int                     error;
 835
 836         error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
 837                                     mp->m_sb.sb_sectsize);
 838         if (error)
 839                 return error;
 840
 841         if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
 842                 unsigned int    log_sector_size = BBSIZE;
 843
 844                 if (xfs_sb_version_hassector(&mp->m_sb))
 845                         log_sector_size = mp->m_sb.sb_logsectsize;
 846                 error = xfs_setsize_buftarg(mp->m_logdev_targp,
 847                                             mp->m_sb.sb_blocksize,
 848                                             log_sector_size);
 849                 if (error)
 850                         return error;
 851         }
 852         if (mp->m_rtdev_targp) {
 853                 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
 854                                             mp->m_sb.sb_blocksize,
 855                                             mp->m_sb.sb_sectsize);
 856                 if (error)
 857                         return error;
 858         }
 859
 860         return 0;
 861 }
 862
 863 /*
 864  * XFS AIL push thread support
 865  */
 866 void
 867 xfsaild_wakeup(
 868         struct xfs_ail          *ailp,
 869         xfs_lsn_t               threshold_lsn)
 870 {
 871         ailp->xa_target = threshold_lsn;
 872         wake_up_process(ailp->xa_task);
 873 }
 874
 875 int
 876 xfsaild(
 877         void    *data)
 878 {
 879         struct xfs_ail  *ailp = data;
 880         xfs_lsn_t       last_pushed_lsn = 0;
 881         long            tout = 0;
 882
 883         while (!kthread_should_stop()) {
 884                 if (tout)
 885                         schedule_timeout_interruptible(msecs_to_jiffies(tout));
 886                 tout = 1000;
 887
 888                 /* swsusp */
 889                 try_to_freeze();
 890
 891                 ASSERT(ailp->xa_mount->m_log);
 892                 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
 893                         continue;
 894
 895                 tout = xfsaild_push(ailp, &last_pushed_lsn);
 896         }
 897
 898         return 0;
 899 }       /* xfsaild */
 900
 901 int
 902 xfsaild_start(
 903         struct xfs_ail  *ailp)
 904 {
 905         ailp->xa_target = 0;
 906         ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
 907         if (IS_ERR(ailp->xa_task))
 908                 return -PTR_ERR(ailp->xa_task);
 909         return 0;
 910 }
 911
 912 void
 913 xfsaild_stop(
 914         struct xfs_ail  *ailp)
 915 {
 916         kthread_stop(ailp->xa_task);
 917 }
 918
 919
 920 /* Catch misguided souls that try to use this interface on XFS */
 921 STATIC struct inode *
 922 xfs_fs_alloc_inode(
 923         struct super_block      *sb)
 924 {
 925         BUG();
 926         return NULL;
 927 }
 928
 929 /*
 930  * Now that the generic code is guaranteed not to be accessing
 931  * the linux inode, we can reclaim the inode.
 932  */
 933 STATIC void
 934 xfs_fs_destroy_inode(
 935         struct inode    *inode)
 936 {
 937         xfs_inode_t             *ip = XFS_I(inode);
 938
 939         XFS_STATS_INC(vn_reclaim);
 940         if (xfs_reclaim(ip))
 941                 panic("%s: cannot reclaim 0x%p\n", __func__, inode);
 942 }
 943
 944 /*
 945  * Slab object creation initialisation for the XFS inode.
 946  * This covers only the idempotent fields in the XFS inode;
 947  * all other fields need to be initialised on allocation
 948  * from the slab. This avoids the need to repeatedly intialise
 949  * fields in the xfs inode that left in the initialise state
 950  * when freeing the inode.
 951  */
 952 STATIC void
 953 xfs_fs_inode_init_once(
 954         void                    *inode)
 955 {
 956         struct xfs_inode        *ip = inode;
 957
 958         memset(ip, 0, sizeof(struct xfs_inode));
 959
 960         /* vfs inode */
 961         inode_init_once(VFS_I(ip));
 962
 963         /* xfs inode */
 964         atomic_set(&ip->i_iocount, 0);
 965         atomic_set(&ip->i_pincount, 0);
 966         spin_lock_init(&ip->i_flags_lock);
 967         init_waitqueue_head(&ip->i_ipin_wait);
 968         /*
 969          * Because we want to use a counting completion, complete
 970          * the flush completion once to allow a single access to
 971          * the flush completion without blocking.
 972          */
 973         init_completion(&ip->i_flush);
 974         complete(&ip->i_flush);
 975
 976         mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
 977                      "xfsino", ip->i_ino);
 978         mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
 979 }
 980
 981 /*
 982  * Attempt to flush the inode, this will actually fail
 983  * if the inode is pinned, but we dirty the inode again
 984  * at the point when it is unpinned after a log write,
 985  * since this is when the inode itself becomes flushable.
 986  */
 987 STATIC int
 988 xfs_fs_write_inode(
 989         struct inode            *inode,
 990         int                     sync)
 991 {
 992         struct xfs_inode        *ip = XFS_I(inode);
 993         int                     error = 0;
 994         int                     flags = 0;
 995
 996         xfs_itrace_entry(ip);
 997         if (sync) {
 998                 error = xfs_wait_on_pages(ip, 0, -1);
 999                 if (error)
1000                         goto out_error;
1001                 flags |= FLUSH_SYNC;
1002         }
1003         error = xfs_inode_flush(ip, flags);
1004
1005 out_error:
1006         /*
1007          * if we failed to write out the inode then mark
1008          * it dirty again so we'll try again later.
1009          */
1010         if (error)
1011                 xfs_mark_inode_dirty_sync(ip);
1012
1013         return -error;
1014 }
1015
1016 STATIC void
1017 xfs_fs_clear_inode(
1018         struct inode            *inode)
1019 {
1020         xfs_inode_t             *ip = XFS_I(inode);
1021
1022         xfs_itrace_entry(ip);
1023         XFS_STATS_INC(vn_rele);
1024         XFS_STATS_INC(vn_remove);
1025         XFS_STATS_DEC(vn_active);
1026
1027         xfs_inactive(ip);
1028 }
1029
1030 STATIC void
1031 xfs_free_fsname(
1032         struct xfs_mount        *mp)
1033 {
1034         kfree(mp->m_fsname);
1035         kfree(mp->m_rtname);
1036         kfree(mp->m_logname);
1037 }
1038
1039 STATIC void
1040 xfs_fs_put_super(
1041         struct super_block      *sb)
1042 {
1043         struct xfs_mount        *mp = XFS_M(sb);
1044         struct xfs_inode        *rip = mp->m_rootip;
1045         int                     unmount_event_flags = 0;
1046
1047         xfs_syncd_stop(mp);
1048         xfs_sync_inodes(mp, SYNC_ATTR|SYNC_DELWRI);
1049
1050 #ifdef HAVE_DMAPI
1051         if (mp->m_flags & XFS_MOUNT_DMAPI) {
1052                 unmount_event_flags =
1053                         (mp->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ?
1054                                 0 : DM_FLAGS_UNWANTED;
1055                 /*
1056                  * Ignore error from dmapi here, first unmount is not allowed
1057                  * to fail anyway, and second we wouldn't want to fail a
1058                  * unmount because of dmapi.
1059                  */
1060                 XFS_SEND_PREUNMOUNT(mp, rip, DM_RIGHT_NULL, rip, DM_RIGHT_NULL,
1061                                 NULL, NULL, 0, 0, unmount_event_flags);
1062         }
1063 #endif
1064
1065         /*
1066          * Blow away any referenced inode in the filestreams cache.
1067          * This can and will cause log traffic as inodes go inactive
1068          * here.
1069          */
1070         xfs_filestream_unmount(mp);
1071
1072         XFS_bflush(mp->m_ddev_targp);
1073
1074         if (mp->m_flags & XFS_MOUNT_DMAPI) {
1075                 XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
1076                                 unmount_event_flags);
1077         }
1078
1079         xfs_unmountfs(mp);
1080         xfs_freesb(mp);
1081         xfs_icsb_destroy_counters(mp);
1082         xfs_close_devices(mp);
1083         xfs_qmops_put(mp);
1084         xfs_dmops_put(mp);
1085         xfs_free_fsname(mp);
1086         kfree(mp);
1087 }
1088
1089 STATIC void
1090 xfs_fs_write_super(
1091         struct super_block      *sb)
1092 {
1093         if (!(sb->s_flags & MS_RDONLY))
1094                 xfs_sync_fsdata(XFS_M(sb), 0);
1095         sb->s_dirt = 0;
1096 }
1097
1098 STATIC int
1099 xfs_fs_sync_super(
1100         struct super_block      *sb,
1101         int                     wait)
1102 {
1103         struct xfs_mount        *mp = XFS_M(sb);
1104         int                     error;
1105
1106         /*
1107          * Treat a sync operation like a freeze.  This is to work
1108          * around a race in sync_inodes() which works in two phases
1109          * - an asynchronous flush, which can write out an inode
1110          * without waiting for file size updates to complete, and a
1111          * synchronous flush, which wont do anything because the
1112          * async flush removed the inode's dirty flag.  Also
1113          * sync_inodes() will not see any files that just have
1114          * outstanding transactions to be flushed because we don't
1115          * dirty the Linux inode until after the transaction I/O
1116          * completes.
1117          */
1118         if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE))
1119                 error = xfs_quiesce_data(mp);
1120         else
1121                 error = xfs_sync_fsdata(mp, 0);
1122         sb->s_dirt = 0;
1123
1124         if (unlikely(laptop_mode)) {
1125                 int     prev_sync_seq = mp->m_sync_seq;
1126
1127                 /*
1128                  * The disk must be active because we're syncing.
1129                  * We schedule xfssyncd now (now that the disk is
1130                  * active) instead of later (when it might not be).
1131                  */
1132                 wake_up_process(mp->m_sync_task);
1133                 /*
1134                  * We have to wait for the sync iteration to complete.
1135                  * If we don't, the disk activity caused by the sync
1136                  * will come after the sync is completed, and that
1137                  * triggers another sync from laptop mode.
1138                  */
1139                 wait_event(mp->m_wait_single_sync_task,
1140                                 mp->m_sync_seq != prev_sync_seq);
1141         }
1142
1143         return -error;
1144 }
1145
1146 STATIC int
1147 xfs_fs_statfs(
1148         struct dentry           *dentry,
1149         struct kstatfs          *statp)
1150 {
1151         struct xfs_mount        *mp = XFS_M(dentry->d_sb);
1152         xfs_sb_t                *sbp = &mp->m_sb;
1153         __uint64_t              fakeinos, id;
1154         xfs_extlen_t            lsize;
1155
1156         statp->f_type = XFS_SB_MAGIC;
1157         statp->f_namelen = MAXNAMELEN - 1;
1158
1159         id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1160         statp->f_fsid.val[0] = (u32)id;
1161         statp->f_fsid.val[1] = (u32)(id >> 32);
1162
1163         xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1164
1165         spin_lock(&mp->m_sb_lock);
1166         statp->f_bsize = sbp->sb_blocksize;
1167         lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1168         statp->f_blocks = sbp->sb_dblocks - lsize;
1169         statp->f_bfree = statp->f_bavail =
1170                                 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1171         fakeinos = statp->f_bfree << sbp->sb_inopblog;
1172 #if XFS_BIG_INUMS
1173         fakeinos += mp->m_inoadd;
1174 #endif
1175         statp->f_files =
1176             MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1177         if (mp->m_maxicount)
1178 #if XFS_BIG_INUMS
1179                 if (!mp->m_inoadd)
1180 #endif
1181                         statp->f_files = min_t(typeof(statp->f_files),
1182                                                 statp->f_files,
1183                                                 mp->m_maxicount);
1184         statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1185         spin_unlock(&mp->m_sb_lock);
1186
1187         XFS_QM_DQSTATVFS(XFS_I(dentry->d_inode), statp);
1188         return 0;
1189 }
1190
1191 STATIC int
1192 xfs_fs_remount(
1193         struct super_block      *sb,
1194         int                     *flags,
1195         char                    *options)
1196 {
1197         struct xfs_mount        *mp = XFS_M(sb);
1198         substring_t             args[MAX_OPT_ARGS];
1199         char                    *p;
1200         int                     error;
1201
1202         while ((p = strsep(&options, ",")) != NULL) {
1203                 int token;
1204
1205                 if (!*p)
1206                         continue;
1207
1208                 token = match_token(p, tokens, args);
1209                 switch (token) {
1210                 case Opt_barrier:
1211                         mp->m_flags |= XFS_MOUNT_BARRIER;
1212
1213                         /*
1214                          * Test if barriers are actually working if we can,
1215                          * else delay this check until the filesystem is
1216                          * marked writeable.
1217                          */
1218                         if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1219                                 xfs_mountfs_check_barriers(mp);
1220                         break;
1221                 case Opt_nobarrier:
1222                         mp->m_flags &= ~XFS_MOUNT_BARRIER;
1223                         break;
1224                 default:
1225                         /*
1226                          * Logically we would return an error here to prevent
1227                          * users from believing they might have changed
1228                          * mount options using remount which can't be changed.
1229                          *
1230                          * But unfortunately mount(8) adds all options from
1231                          * mtab and fstab to the mount arguments in some cases
1232                          * so we can't blindly reject options, but have to
1233                          * check for each specified option if it actually
1234                          * differs from the currently set option and only
1235                          * reject it if that's the case.
1236                          *
1237                          * Until that is implemented we return success for
1238                          * every remount request, and silently ignore all
1239                          * options that we can't actually change.
1240                          */
1241 #if 0
1242                         printk(KERN_INFO
1243         "XFS: mount option \"%s\" not supported for remount\n", p);
1244                         return -EINVAL;
1245 #else
1246                         break;
1247 #endif
1248                 }
1249         }
1250
1251         /* ro -> rw */
1252         if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1253                 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1254                 if (mp->m_flags & XFS_MOUNT_BARRIER)
1255                         xfs_mountfs_check_barriers(mp);
1256
1257                 /*
1258                  * If this is the first remount to writeable state we
1259                  * might have some superblock changes to update.
1260                  */
1261                 if (mp->m_update_flags) {
1262                         error = xfs_mount_log_sb(mp, mp->m_update_flags);
1263                         if (error) {
1264                                 cmn_err(CE_WARN,
1265                                         "XFS: failed to write sb changes");
1266                                 return error;
1267                         }
1268                         mp->m_update_flags = 0;
1269                 }
1270         }
1271
1272         /* rw -> ro */
1273         if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1274                 xfs_quiesce_data(mp);
1275                 xfs_quiesce_attr(mp);
1276                 mp->m_flags |= XFS_MOUNT_RDONLY;
1277         }
1278
1279         return 0;
1280 }
1281
1282 /*
1283  * Second stage of a freeze. The data is already frozen so we only
1284  * need to take care of the metadata. Once that's done write a dummy
1285  * record to dirty the log in case of a crash while frozen.
1286  */
1287 STATIC int
1288 xfs_fs_freeze(
1289         struct super_block      *sb)
1290 {
1291         struct xfs_mount        *mp = XFS_M(sb);
1292
1293         xfs_quiesce_attr(mp);
1294         return -xfs_fs_log_dummy(mp);
1295 }
1296
1297 STATIC int
1298 xfs_fs_show_options(
1299         struct seq_file         *m,
1300         struct vfsmount         *mnt)
1301 {
1302         return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1303 }
1304
1305 STATIC int
1306 xfs_fs_quotasync(
1307         struct super_block      *sb,
1308         int                     type)
1309 {
1310         return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XQUOTASYNC, 0, NULL);
1311 }
1312
1313 STATIC int
1314 xfs_fs_getxstate(
1315         struct super_block      *sb,
1316         struct fs_quota_stat    *fqs)
1317 {
1318         return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XGETQSTAT, 0, (caddr_t)fqs);
1319 }
1320
1321 STATIC int
1322 xfs_fs_setxstate(
1323         struct super_block      *sb,
1324         unsigned int            flags,
1325         int                     op)
1326 {
1327         return -XFS_QM_QUOTACTL(XFS_M(sb), op, 0, (caddr_t)&flags);
1328 }
1329
1330 STATIC int
1331 xfs_fs_getxquota(
1332         struct super_block      *sb,
1333         int                     type,
1334         qid_t                   id,
1335         struct fs_disk_quota    *fdq)
1336 {
1337         return -XFS_QM_QUOTACTL(XFS_M(sb),
1338                                  (type == USRQUOTA) ? Q_XGETQUOTA :
1339                                   ((type == GRPQUOTA) ? Q_XGETGQUOTA :
1340                                    Q_XGETPQUOTA), id, (caddr_t)fdq);
1341 }
1342
1343 STATIC int
1344 xfs_fs_setxquota(
1345         struct super_block      *sb,
1346         int                     type,
1347         qid_t                   id,
1348         struct fs_disk_quota    *fdq)
1349 {
1350         return -XFS_QM_QUOTACTL(XFS_M(sb),
1351                                  (type == USRQUOTA) ? Q_XSETQLIM :
1352                                   ((type == GRPQUOTA) ? Q_XSETGQLIM :
1353                                    Q_XSETPQLIM), id, (caddr_t)fdq);
1354 }
1355
1356 /*
1357  * This function fills in xfs_mount_t fields based on mount args.
1358  * Note: the superblock _has_ now been read in.
1359  */
1360 STATIC int
1361 xfs_finish_flags(
1362         struct xfs_mount        *mp)
1363 {
1364         int                     ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1365
1366         /* Fail a mount where the logbuf is smaller than the log stripe */
1367         if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1368                 if (mp->m_logbsize <= 0 &&
1369                     mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1370                         mp->m_logbsize = mp->m_sb.sb_logsunit;
1371                 } else if (mp->m_logbsize > 0 &&
1372                            mp->m_logbsize < mp->m_sb.sb_logsunit) {
1373                         cmn_err(CE_WARN,
1374         "XFS: logbuf size must be greater than or equal to log stripe size");
1375                         return XFS_ERROR(EINVAL);
1376                 }
1377         } else {
1378                 /* Fail a mount if the logbuf is larger than 32K */
1379                 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1380                         cmn_err(CE_WARN,
1381         "XFS: logbuf size for version 1 logs must be 16K or 32K");
1382                         return XFS_ERROR(EINVAL);
1383                 }
1384         }
1385
1386         /*
1387          * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1388          * told by noattr2 to turn it off
1389          */
1390         if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1391             !(mp->m_flags & XFS_MOUNT_NOATTR2))
1392                 mp->m_flags |= XFS_MOUNT_ATTR2;
1393
1394         /*
1395          * prohibit r/w mounts of read-only filesystems
1396          */
1397         if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1398                 cmn_err(CE_WARN,
1399         "XFS: cannot mount a read-only filesystem as read-write");
1400                 return XFS_ERROR(EROFS);
1401         }
1402
1403         return 0;
1404 }
1405
1406 STATIC int
1407 xfs_fs_fill_super(
1408         struct super_block      *sb,
1409         void                    *data,
1410         int                     silent)
1411 {
1412         struct inode            *root;
1413         struct xfs_mount        *mp = NULL;
1414         int                     flags = 0, error = ENOMEM;
1415         char                    *mtpt = NULL;
1416
1417         mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1418         if (!mp)
1419                 goto out;
1420
1421         spin_lock_init(&mp->m_sb_lock);
1422         mutex_init(&mp->m_growlock);
1423         atomic_set(&mp->m_active_trans, 0);
1424         INIT_LIST_HEAD(&mp->m_sync_list);
1425         spin_lock_init(&mp->m_sync_lock);
1426         init_waitqueue_head(&mp->m_wait_single_sync_task);
1427
1428         mp->m_super = sb;
1429         sb->s_fs_info = mp;
1430
1431         error = xfs_parseargs(mp, (char *)data, &mtpt);
1432         if (error)
1433                 goto out_free_fsname;
1434
1435         sb_min_blocksize(sb, BBSIZE);
1436         sb->s_xattr = xfs_xattr_handlers;
1437         sb->s_export_op = &xfs_export_operations;
1438         sb->s_qcop = &xfs_quotactl_operations;
1439         sb->s_op = &xfs_super_operations;
1440
1441         error = xfs_dmops_get(mp);
1442         if (error)
1443                 goto out_free_fsname;
1444         error = xfs_qmops_get(mp);
1445         if (error)
1446                 goto out_put_dmops;
1447
1448         if (silent)
1449                 flags |= XFS_MFSI_QUIET;
1450
1451         error = xfs_open_devices(mp);
1452         if (error)
1453                 goto out_put_qmops;
1454
1455         if (xfs_icsb_init_counters(mp))
1456                 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1457
1458         error = xfs_readsb(mp, flags);
1459         if (error)
1460                 goto out_destroy_counters;
1461
1462         error = xfs_finish_flags(mp);
1463         if (error)
1464                 goto out_free_sb;
1465
1466         error = xfs_setup_devices(mp);
1467         if (error)
1468                 goto out_free_sb;
1469
1470         if (mp->m_flags & XFS_MOUNT_BARRIER)
1471                 xfs_mountfs_check_barriers(mp);
1472
1473         error = xfs_filestream_mount(mp);
1474         if (error)
1475                 goto out_free_sb;
1476
1477         error = xfs_mountfs(mp);
1478         if (error)
1479                 goto out_filestream_unmount;
1480
1481         XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1482
1483         sb->s_dirt = 1;
1484         sb->s_magic = XFS_SB_MAGIC;
1485         sb->s_blocksize = mp->m_sb.sb_blocksize;
1486         sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1487         sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1488         sb->s_time_gran = 1;
1489         set_posix_acl_flag(sb);
1490
1491         root = igrab(VFS_I(mp->m_rootip));
1492         if (!root) {
1493                 error = ENOENT;
1494                 goto fail_unmount;
1495         }
1496         if (is_bad_inode(root)) {
1497                 error = EINVAL;
1498                 goto fail_vnrele;
1499         }
1500         sb->s_root = d_alloc_root(root);
1501         if (!sb->s_root) {
1502                 error = ENOMEM;
1503                 goto fail_vnrele;
1504         }
1505
1506         error = xfs_syncd_init(mp);
1507         if (error)
1508                 goto fail_vnrele;
1509
1510         kfree(mtpt);
1511
1512         xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1513         return 0;
1514
1515  out_filestream_unmount:
1516         xfs_filestream_unmount(mp);
1517  out_free_sb:
1518         xfs_freesb(mp);
1519  out_destroy_counters:
1520         xfs_icsb_destroy_counters(mp);
1521         xfs_close_devices(mp);
1522  out_put_qmops:
1523         xfs_qmops_put(mp);
1524  out_put_dmops:
1525         xfs_dmops_put(mp);
1526  out_free_fsname:
1527         xfs_free_fsname(mp);
1528         kfree(mtpt);
1529         kfree(mp);
1530  out:
1531         return -error;
1532
1533  fail_vnrele:
1534         if (sb->s_root) {
1535                 dput(sb->s_root);
1536                 sb->s_root = NULL;
1537         } else {
1538                 iput(root);
1539         }
1540
1541  fail_unmount:
1542         /*
1543          * Blow away any referenced inode in the filestreams cache.
1544          * This can and will cause log traffic as inodes go inactive
1545          * here.
1546          */
1547         xfs_filestream_unmount(mp);
1548
1549         XFS_bflush(mp->m_ddev_targp);
1550
1551         xfs_unmountfs(mp);
1552         goto out_free_sb;
1553 }
1554
1555 STATIC int
1556 xfs_fs_get_sb(
1557         struct file_system_type *fs_type,
1558         int                     flags,
1559         const char              *dev_name,
1560         void                    *data,
1561         struct vfsmount         *mnt)
1562 {
1563         return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1564                            mnt);
1565 }
1566
1567 static struct super_operations xfs_super_operations = {
1568         .alloc_inode            = xfs_fs_alloc_inode,
1569         .destroy_inode          = xfs_fs_destroy_inode,
1570         .write_inode            = xfs_fs_write_inode,
1571         .clear_inode            = xfs_fs_clear_inode,
1572         .put_super              = xfs_fs_put_super,
1573         .write_super            = xfs_fs_write_super,
1574         .sync_fs                = xfs_fs_sync_super,
1575         .freeze_fs              = xfs_fs_freeze,
1576         .statfs                 = xfs_fs_statfs,
1577         .remount_fs             = xfs_fs_remount,
1578         .show_options           = xfs_fs_show_options,
1579 };
1580
1581 static struct quotactl_ops xfs_quotactl_operations = {
1582         .quota_sync             = xfs_fs_quotasync,
1583         .get_xstate             = xfs_fs_getxstate,
1584         .set_xstate             = xfs_fs_setxstate,
1585         .get_xquota             = xfs_fs_getxquota,
1586         .set_xquota             = xfs_fs_setxquota,
1587 };
1588
1589 static struct file_system_type xfs_fs_type = {
1590         .owner                  = THIS_MODULE,
1591         .name                   = "xfs",
1592         .get_sb                 = xfs_fs_get_sb,
1593         .kill_sb                = kill_block_super,
1594         .fs_flags               = FS_REQUIRES_DEV,
1595 };
1596
1597 STATIC int __init
1598 xfs_alloc_trace_bufs(void)
1599 {
1600 #ifdef XFS_ALLOC_TRACE
1601         xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_MAYFAIL);
1602         if (!xfs_alloc_trace_buf)
1603                 goto out;
1604 #endif
1605 #ifdef XFS_BMAP_TRACE
1606         xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_MAYFAIL);
1607         if (!xfs_bmap_trace_buf)
1608                 goto out_free_alloc_trace;
1609 #endif
1610 #ifdef XFS_BTREE_TRACE
1611         xfs_allocbt_trace_buf = ktrace_alloc(XFS_ALLOCBT_TRACE_SIZE,
1612                                              KM_MAYFAIL);
1613         if (!xfs_allocbt_trace_buf)
1614                 goto out_free_bmap_trace;
1615
1616         xfs_inobt_trace_buf = ktrace_alloc(XFS_INOBT_TRACE_SIZE, KM_MAYFAIL);
1617         if (!xfs_inobt_trace_buf)
1618                 goto out_free_allocbt_trace;
1619
1620         xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_MAYFAIL);
1621         if (!xfs_bmbt_trace_buf)
1622                 goto out_free_inobt_trace;
1623 #endif
1624 #ifdef XFS_ATTR_TRACE
1625         xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_MAYFAIL);
1626         if (!xfs_attr_trace_buf)
1627                 goto out_free_bmbt_trace;
1628 #endif
1629 #ifdef XFS_DIR2_TRACE
1630         xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_MAYFAIL);
1631         if (!xfs_dir2_trace_buf)
1632                 goto out_free_attr_trace;
1633 #endif
1634
1635         return 0;
1636
1637 #ifdef XFS_DIR2_TRACE
1638  out_free_attr_trace:
1639 #endif
1640 #ifdef XFS_ATTR_TRACE
1641         ktrace_free(xfs_attr_trace_buf);
1642  out_free_bmbt_trace:
1643 #endif
1644 #ifdef XFS_BTREE_TRACE
1645         ktrace_free(xfs_bmbt_trace_buf);
1646  out_free_inobt_trace:
1647         ktrace_free(xfs_inobt_trace_buf);
1648  out_free_allocbt_trace:
1649         ktrace_free(xfs_allocbt_trace_buf);
1650  out_free_bmap_trace:
1651 #endif
1652 #ifdef XFS_BMAP_TRACE
1653         ktrace_free(xfs_bmap_trace_buf);
1654  out_free_alloc_trace:
1655 #endif
1656 #ifdef XFS_ALLOC_TRACE
1657         ktrace_free(xfs_alloc_trace_buf);
1658  out:
1659 #endif
1660         return -ENOMEM;
1661 }
1662
1663 STATIC void
1664 xfs_free_trace_bufs(void)
1665 {
1666 #ifdef XFS_DIR2_TRACE
1667         ktrace_free(xfs_dir2_trace_buf);
1668 #endif
1669 #ifdef XFS_ATTR_TRACE
1670         ktrace_free(xfs_attr_trace_buf);
1671 #endif
1672 #ifdef XFS_BTREE_TRACE
1673         ktrace_free(xfs_bmbt_trace_buf);
1674         ktrace_free(xfs_inobt_trace_buf);
1675         ktrace_free(xfs_allocbt_trace_buf);
1676 #endif
1677 #ifdef XFS_BMAP_TRACE
1678         ktrace_free(xfs_bmap_trace_buf);
1679 #endif
1680 #ifdef XFS_ALLOC_TRACE
1681         ktrace_free(xfs_alloc_trace_buf);
1682 #endif
1683 }
1684
1685 STATIC int __init
1686 xfs_init_zones(void)
1687 {
1688
1689         xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1690         if (!xfs_ioend_zone)
1691                 goto out;
1692
1693         xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1694                                                   xfs_ioend_zone);
1695         if (!xfs_ioend_pool)
1696                 goto out_destroy_ioend_zone;
1697
1698         xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1699                                                 "xfs_log_ticket");
1700         if (!xfs_log_ticket_zone)
1701                 goto out_destroy_ioend_pool;
1702
1703         xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1704                                                 "xfs_bmap_free_item");
1705         if (!xfs_bmap_free_item_zone)
1706                 goto out_destroy_log_ticket_zone;
1707
1708         xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1709                                                 "xfs_btree_cur");
1710         if (!xfs_btree_cur_zone)
1711                 goto out_destroy_bmap_free_item_zone;
1712
1713         xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1714                                                 "xfs_da_state");
1715         if (!xfs_da_state_zone)
1716                 goto out_destroy_btree_cur_zone;
1717
1718         xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1719         if (!xfs_dabuf_zone)
1720                 goto out_destroy_da_state_zone;
1721
1722         xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1723         if (!xfs_ifork_zone)
1724                 goto out_destroy_dabuf_zone;
1725
1726         xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1727         if (!xfs_trans_zone)
1728                 goto out_destroy_ifork_zone;
1729
1730         /*
1731          * The size of the zone allocated buf log item is the maximum
1732          * size possible under XFS.  This wastes a little bit of memory,
1733          * but it is much faster.
1734          */
1735         xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1736                                 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1737                                   NBWORD) * sizeof(int))), "xfs_buf_item");
1738         if (!xfs_buf_item_zone)
1739                 goto out_destroy_trans_zone;
1740
1741         xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1742                         ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1743                                  sizeof(xfs_extent_t))), "xfs_efd_item");
1744         if (!xfs_efd_zone)
1745                 goto out_destroy_buf_item_zone;
1746
1747         xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1748                         ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1749                                 sizeof(xfs_extent_t))), "xfs_efi_item");
1750         if (!xfs_efi_zone)
1751                 goto out_destroy_efd_zone;
1752
1753         xfs_inode_zone =
1754                 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1755                         KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1756                         xfs_fs_inode_init_once);
1757         if (!xfs_inode_zone)
1758                 goto out_destroy_efi_zone;
1759
1760         xfs_ili_zone =
1761                 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1762                                         KM_ZONE_SPREAD, NULL);
1763         if (!xfs_ili_zone)
1764                 goto out_destroy_inode_zone;
1765
1766 #ifdef CONFIG_XFS_POSIX_ACL
1767         xfs_acl_zone = kmem_zone_init(sizeof(xfs_acl_t), "xfs_acl");
1768         if (!xfs_acl_zone)
1769                 goto out_destroy_ili_zone;
1770 #endif
1771
1772         return 0;
1773
1774 #ifdef CONFIG_XFS_POSIX_ACL
1775  out_destroy_ili_zone:
1776 #endif
1777         kmem_zone_destroy(xfs_ili_zone);
1778  out_destroy_inode_zone:
1779         kmem_zone_destroy(xfs_inode_zone);
1780  out_destroy_efi_zone:
1781         kmem_zone_destroy(xfs_efi_zone);
1782  out_destroy_efd_zone:
1783         kmem_zone_destroy(xfs_efd_zone);
1784  out_destroy_buf_item_zone:
1785         kmem_zone_destroy(xfs_buf_item_zone);
1786  out_destroy_trans_zone:
1787         kmem_zone_destroy(xfs_trans_zone);
1788  out_destroy_ifork_zone:
1789         kmem_zone_destroy(xfs_ifork_zone);
1790  out_destroy_dabuf_zone:
1791         kmem_zone_destroy(xfs_dabuf_zone);
1792  out_destroy_da_state_zone:
1793         kmem_zone_destroy(xfs_da_state_zone);
1794  out_destroy_btree_cur_zone:
1795         kmem_zone_destroy(xfs_btree_cur_zone);
1796  out_destroy_bmap_free_item_zone:
1797         kmem_zone_destroy(xfs_bmap_free_item_zone);
1798  out_destroy_log_ticket_zone:
1799         kmem_zone_destroy(xfs_log_ticket_zone);
1800  out_destroy_ioend_pool:
1801         mempool_destroy(xfs_ioend_pool);
1802  out_destroy_ioend_zone:
1803         kmem_zone_destroy(xfs_ioend_zone);
1804  out:
1805         return -ENOMEM;
1806 }
1807
1808 STATIC void
1809 xfs_destroy_zones(void)
1810 {
1811 #ifdef CONFIG_XFS_POSIX_ACL
1812         kmem_zone_destroy(xfs_acl_zone);
1813 #endif
1814         kmem_zone_destroy(xfs_ili_zone);
1815         kmem_zone_destroy(xfs_inode_zone);
1816         kmem_zone_destroy(xfs_efi_zone);
1817         kmem_zone_destroy(xfs_efd_zone);
1818         kmem_zone_destroy(xfs_buf_item_zone);
1819         kmem_zone_destroy(xfs_trans_zone);
1820         kmem_zone_destroy(xfs_ifork_zone);
1821         kmem_zone_destroy(xfs_dabuf_zone);
1822         kmem_zone_destroy(xfs_da_state_zone);
1823         kmem_zone_destroy(xfs_btree_cur_zone);
1824         kmem_zone_destroy(xfs_bmap_free_item_zone);
1825         kmem_zone_destroy(xfs_log_ticket_zone);
1826         mempool_destroy(xfs_ioend_pool);
1827         kmem_zone_destroy(xfs_ioend_zone);
1828
1829 }
1830
1831 STATIC int __init
1832 init_xfs_fs(void)
1833 {
1834         int                     error;
1835
1836         printk(KERN_INFO XFS_VERSION_STRING " with "
1837                          XFS_BUILD_OPTIONS " enabled\n");
1838
1839         ktrace_init(64);
1840         xfs_ioend_init();
1841         xfs_dir_startup();
1842
1843         error = xfs_init_zones();
1844         if (error)
1845                 goto out;
1846
1847         error = xfs_alloc_trace_bufs();
1848         if (error)
1849                 goto out_destroy_zones;
1850
1851         error = xfs_mru_cache_init();
1852         if (error)
1853                 goto out_free_trace_buffers;
1854
1855         error = xfs_filestream_init();
1856         if (error)
1857                 goto out_mru_cache_uninit;
1858
1859         error = xfs_buf_init();
1860         if (error)
1861                 goto out_filestream_uninit;
1862
1863         error = xfs_init_procfs();
1864         if (error)
1865                 goto out_buf_terminate;
1866
1867         error = xfs_sysctl_register();
1868         if (error)
1869                 goto out_cleanup_procfs;
1870
1871         vfs_initquota();
1872
1873         error = register_filesystem(&xfs_fs_type);
1874         if (error)
1875                 goto out_sysctl_unregister;
1876         return 0;
1877
1878  out_sysctl_unregister:
1879         xfs_sysctl_unregister();
1880  out_cleanup_procfs:
1881         xfs_cleanup_procfs();
1882  out_buf_terminate:
1883         xfs_buf_terminate();
1884  out_filestream_uninit:
1885         xfs_filestream_uninit();
1886  out_mru_cache_uninit:
1887         xfs_mru_cache_uninit();
1888  out_free_trace_buffers:
1889         xfs_free_trace_bufs();
1890  out_destroy_zones:
1891         xfs_destroy_zones();
1892  out:
1893         return error;
1894 }
1895
1896 STATIC void __exit
1897 exit_xfs_fs(void)
1898 {
1899         vfs_exitquota();
1900         unregister_filesystem(&xfs_fs_type);
1901         xfs_sysctl_unregister();
1902         xfs_cleanup_procfs();
1903         xfs_buf_terminate();
1904         xfs_filestream_uninit();
1905         xfs_mru_cache_uninit();
1906         xfs_free_trace_bufs();
1907         xfs_destroy_zones();
1908         ktrace_uninit();
1909 }
1910
1911 module_init(init_xfs_fs);
1912 module_exit(exit_xfs_fs);
1913
1914 MODULE_AUTHOR("Silicon Graphics, Inc.");
1915 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1916 MODULE_LICENSE("GPL");