fs/xfs/xfs_vfsops.c

   1 /*
   2  * Copyright (c) 2000-2005 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_fs.h"
  20 #include "xfs_types.h"
  21 #include "xfs_bit.h"
  22 #include "xfs_log.h"
  23 #include "xfs_inum.h"
  24 #include "xfs_trans.h"
  25 #include "xfs_sb.h"
  26 #include "xfs_ag.h"
  27 #include "xfs_dir.h"
  28 #include "xfs_dir2.h"
  29 #include "xfs_dmapi.h"
  30 #include "xfs_mount.h"
  31 #include "xfs_da_btree.h"
  32 #include "xfs_bmap_btree.h"
  33 #include "xfs_ialloc_btree.h"
  34 #include "xfs_alloc_btree.h"
  35 #include "xfs_dir_sf.h"
  36 #include "xfs_dir2_sf.h"
  37 #include "xfs_attr_sf.h"
  38 #include "xfs_dinode.h"
  39 #include "xfs_inode.h"
  40 #include "xfs_inode_item.h"
  41 #include "xfs_btree.h"
  42 #include "xfs_alloc.h"
  43 #include "xfs_ialloc.h"
  44 #include "xfs_quota.h"
  45 #include "xfs_error.h"
  46 #include "xfs_bmap.h"
  47 #include "xfs_rw.h"
  48 #include "xfs_refcache.h"
  49 #include "xfs_buf_item.h"
  50 #include "xfs_log_priv.h"
  51 #include "xfs_dir2_trace.h"
  52 #include "xfs_extfree_item.h"
  53 #include "xfs_acl.h"
  54 #include "xfs_attr.h"
  55 #include "xfs_clnt.h"
  56
  57 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
  58
  59 int
  60 xfs_init(void)
  61 {
  62         extern kmem_zone_t      *xfs_bmap_free_item_zone;
  63         extern kmem_zone_t      *xfs_btree_cur_zone;
  64         extern kmem_zone_t      *xfs_trans_zone;
  65         extern kmem_zone_t      *xfs_buf_item_zone;
  66         extern kmem_zone_t      *xfs_dabuf_zone;
  67 #ifdef XFS_DABUF_DEBUG
  68         extern lock_t           xfs_dabuf_global_lock;
  69         spinlock_init(&xfs_dabuf_global_lock, "xfsda");
  70 #endif
  71
  72         /*
  73          * Initialize all of the zone allocators we use.
  74          */
  75         xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
  76                                                  "xfs_bmap_free_item");
  77         xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
  78                                             "xfs_btree_cur");
  79         xfs_inode_zone = kmem_zone_init(sizeof(xfs_inode_t), "xfs_inode");
  80         xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
  81         xfs_da_state_zone =
  82                 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
  83         xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
  84
  85         /*
  86          * The size of the zone allocated buf log item is the maximum
  87          * size possible under XFS.  This wastes a little bit of memory,
  88          * but it is much faster.
  89          */
  90         xfs_buf_item_zone =
  91                 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
  92                                 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
  93                                   NBWORD) * sizeof(int))),
  94                                "xfs_buf_item");
  95         xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
  96                                        ((XFS_EFD_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
  97                                       "xfs_efd_item");
  98         xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
  99                                        ((XFS_EFI_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
 100                                       "xfs_efi_item");
 101         xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
 102         xfs_ili_zone = kmem_zone_init(sizeof(xfs_inode_log_item_t), "xfs_ili");
 103         xfs_chashlist_zone = kmem_zone_init(sizeof(xfs_chashlist_t),
 104                                             "xfs_chashlist");
 105         xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
 106
 107         /*
 108          * Allocate global trace buffers.
 109          */
 110 #ifdef XFS_ALLOC_TRACE
 111         xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
 112 #endif
 113 #ifdef XFS_BMAP_TRACE
 114         xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
 115 #endif
 116 #ifdef XFS_BMBT_TRACE
 117         xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
 118 #endif
 119 #ifdef XFS_DIR_TRACE
 120         xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP);
 121 #endif
 122 #ifdef XFS_ATTR_TRACE
 123         xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
 124 #endif
 125 #ifdef XFS_DIR2_TRACE
 126         xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
 127 #endif
 128
 129         xfs_dir_startup();
 130
 131 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
 132         xfs_error_test_init();
 133 #endif /* DEBUG || INDUCE_IO_ERROR */
 134
 135         xfs_init_procfs();
 136         xfs_sysctl_register();
 137         return 0;
 138 }
 139
 140 void
 141 xfs_cleanup(void)
 142 {
 143         extern kmem_zone_t      *xfs_bmap_free_item_zone;
 144         extern kmem_zone_t      *xfs_btree_cur_zone;
 145         extern kmem_zone_t      *xfs_inode_zone;
 146         extern kmem_zone_t      *xfs_trans_zone;
 147         extern kmem_zone_t      *xfs_da_state_zone;
 148         extern kmem_zone_t      *xfs_dabuf_zone;
 149         extern kmem_zone_t      *xfs_efd_zone;
 150         extern kmem_zone_t      *xfs_efi_zone;
 151         extern kmem_zone_t      *xfs_buf_item_zone;
 152         extern kmem_zone_t      *xfs_chashlist_zone;
 153
 154         xfs_cleanup_procfs();
 155         xfs_sysctl_unregister();
 156         xfs_refcache_destroy();
 157         xfs_acl_zone_destroy(xfs_acl_zone);
 158
 159 #ifdef XFS_DIR2_TRACE
 160         ktrace_free(xfs_dir2_trace_buf);
 161 #endif
 162 #ifdef XFS_ATTR_TRACE
 163         ktrace_free(xfs_attr_trace_buf);
 164 #endif
 165 #ifdef XFS_DIR_TRACE
 166         ktrace_free(xfs_dir_trace_buf);
 167 #endif
 168 #ifdef XFS_BMBT_TRACE
 169         ktrace_free(xfs_bmbt_trace_buf);
 170 #endif
 171 #ifdef XFS_BMAP_TRACE
 172         ktrace_free(xfs_bmap_trace_buf);
 173 #endif
 174 #ifdef XFS_ALLOC_TRACE
 175         ktrace_free(xfs_alloc_trace_buf);
 176 #endif
 177
 178         kmem_cache_destroy(xfs_bmap_free_item_zone);
 179         kmem_cache_destroy(xfs_btree_cur_zone);
 180         kmem_cache_destroy(xfs_inode_zone);
 181         kmem_cache_destroy(xfs_trans_zone);
 182         kmem_cache_destroy(xfs_da_state_zone);
 183         kmem_cache_destroy(xfs_dabuf_zone);
 184         kmem_cache_destroy(xfs_buf_item_zone);
 185         kmem_cache_destroy(xfs_efd_zone);
 186         kmem_cache_destroy(xfs_efi_zone);
 187         kmem_cache_destroy(xfs_ifork_zone);
 188         kmem_cache_destroy(xfs_ili_zone);
 189         kmem_cache_destroy(xfs_chashlist_zone);
 190 }
 191
 192 /*
 193  * xfs_start_flags
 194  *
 195  * This function fills in xfs_mount_t fields based on mount args.
 196  * Note: the superblock has _not_ yet been read in.
 197  */
 198 STATIC int
 199 xfs_start_flags(
 200         struct vfs              *vfs,
 201         struct xfs_mount_args   *ap,
 202         struct xfs_mount        *mp)
 203 {
 204         /* Values are in BBs */
 205         if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
 206                 /*
 207                  * At this point the superblock has not been read
 208                  * in, therefore we do not know the block size.
 209                  * Before the mount call ends we will convert
 210                  * these to FSBs.
 211                  */
 212                 mp->m_dalign = ap->sunit;
 213                 mp->m_swidth = ap->swidth;
 214         }
 215
 216         if (ap->logbufs != -1 &&
 217 #if defined(DEBUG) || defined(XLOG_NOLOG)
 218             ap->logbufs != 0 &&
 219 #endif
 220             (ap->logbufs < XLOG_MIN_ICLOGS ||
 221              ap->logbufs > XLOG_MAX_ICLOGS)) {
 222                 cmn_err(CE_WARN,
 223                         "XFS: invalid logbufs value: %d [not %d-%d]",
 224                         ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
 225                 return XFS_ERROR(EINVAL);
 226         }
 227         mp->m_logbufs = ap->logbufs;
 228         if (ap->logbufsize != -1 &&
 229             ap->logbufsize != 16 * 1024 &&
 230             ap->logbufsize != 32 * 1024 &&
 231             ap->logbufsize != 64 * 1024 &&
 232             ap->logbufsize != 128 * 1024 &&
 233             ap->logbufsize != 256 * 1024) {
 234                 cmn_err(CE_WARN,
 235         "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
 236                         ap->logbufsize);
 237                 return XFS_ERROR(EINVAL);
 238         }
 239         mp->m_ihsize = ap->ihashsize;
 240         mp->m_logbsize = ap->logbufsize;
 241         mp->m_fsname_len = strlen(ap->fsname) + 1;
 242         mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
 243         strcpy(mp->m_fsname, ap->fsname);
 244         if (ap->rtname[0]) {
 245                 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
 246                 strcpy(mp->m_rtname, ap->rtname);
 247         }
 248         if (ap->logname[0]) {
 249                 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
 250                 strcpy(mp->m_logname, ap->logname);
 251         }
 252
 253         if (ap->flags & XFSMNT_WSYNC)
 254                 mp->m_flags |= XFS_MOUNT_WSYNC;
 255 #if XFS_BIG_INUMS
 256         if (ap->flags & XFSMNT_INO64) {
 257                 mp->m_flags |= XFS_MOUNT_INO64;
 258                 mp->m_inoadd = XFS_INO64_OFFSET;
 259         }
 260 #endif
 261         if (ap->flags & XFSMNT_NOATIME)
 262                 mp->m_flags |= XFS_MOUNT_NOATIME;
 263         if (ap->flags & XFSMNT_RETERR)
 264                 mp->m_flags |= XFS_MOUNT_RETERR;
 265         if (ap->flags & XFSMNT_NOALIGN)
 266                 mp->m_flags |= XFS_MOUNT_NOALIGN;
 267         if (ap->flags & XFSMNT_SWALLOC)
 268                 mp->m_flags |= XFS_MOUNT_SWALLOC;
 269         if (ap->flags & XFSMNT_OSYNCISOSYNC)
 270                 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
 271         if (ap->flags & XFSMNT_32BITINODES)
 272                 mp->m_flags |= (XFS_MOUNT_32BITINODES | XFS_MOUNT_32BITINOOPT);
 273
 274         if (ap->flags & XFSMNT_IOSIZE) {
 275                 if (ap->iosizelog > XFS_MAX_IO_LOG ||
 276                     ap->iosizelog < XFS_MIN_IO_LOG) {
 277                         cmn_err(CE_WARN,
 278                 "XFS: invalid log iosize: %d [not %d-%d]",
 279                                 ap->iosizelog, XFS_MIN_IO_LOG,
 280                                 XFS_MAX_IO_LOG);
 281                         return XFS_ERROR(EINVAL);
 282                 }
 283
 284                 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
 285                 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
 286         }
 287
 288         if (ap->flags & XFSMNT_IHASHSIZE)
 289                 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
 290         if (ap->flags & XFSMNT_IDELETE)
 291                 mp->m_flags |= XFS_MOUNT_IDELETE;
 292         if (ap->flags & XFSMNT_DIRSYNC)
 293                 mp->m_flags |= XFS_MOUNT_DIRSYNC;
 294         if (ap->flags & XFSMNT_COMPAT_IOSIZE)
 295                 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
 296         if (ap->flags & XFSMNT_COMPAT_ATTR)
 297                 mp->m_flags |= XFS_MOUNT_COMPAT_ATTR;
 298
 299         /*
 300          * no recovery flag requires a read-only mount
 301          */
 302         if (ap->flags & XFSMNT_NORECOVERY) {
 303                 if (!(vfs->vfs_flag & VFS_RDONLY)) {
 304                         cmn_err(CE_WARN,
 305         "XFS: tried to mount a FS read-write without recovery!");
 306                         return XFS_ERROR(EINVAL);
 307                 }
 308                 mp->m_flags |= XFS_MOUNT_NORECOVERY;
 309         }
 310
 311         if (ap->flags & XFSMNT_NOUUID)
 312                 mp->m_flags |= XFS_MOUNT_NOUUID;
 313         if (ap->flags & XFSMNT_BARRIER)
 314                 mp->m_flags |= XFS_MOUNT_BARRIER;
 315
 316         return 0;
 317 }
 318
 319 /*
 320  * This function fills in xfs_mount_t fields based on mount args.
 321  * Note: the superblock _has_ now been read in.
 322  */
 323 STATIC int
 324 xfs_finish_flags(
 325         struct vfs              *vfs,
 326         struct xfs_mount_args   *ap,
 327         struct xfs_mount        *mp)
 328 {
 329         int                     ronly = (vfs->vfs_flag & VFS_RDONLY);
 330
 331         /* Fail a mount where the logbuf is smaller then the log stripe */
 332         if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
 333                 if ((ap->logbufsize == -1) &&
 334                     (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
 335                         mp->m_logbsize = mp->m_sb.sb_logsunit;
 336                 } else if (ap->logbufsize < mp->m_sb.sb_logsunit) {
 337                         cmn_err(CE_WARN,
 338         "XFS: logbuf size must be greater than or equal to log stripe size");
 339                         return XFS_ERROR(EINVAL);
 340                 }
 341         } else {
 342                 /* Fail a mount if the logbuf is larger than 32K */
 343                 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
 344                         cmn_err(CE_WARN,
 345         "XFS: logbuf size for version 1 logs must be 16K or 32K");
 346                         return XFS_ERROR(EINVAL);
 347                 }
 348         }
 349
 350         /*
 351          * prohibit r/w mounts of read-only filesystems
 352          */
 353         if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
 354                 cmn_err(CE_WARN,
 355         "XFS: cannot mount a read-only filesystem as read-write");
 356                 return XFS_ERROR(EROFS);
 357         }
 358
 359         /*
 360          * check for shared mount.
 361          */
 362         if (ap->flags & XFSMNT_SHARED) {
 363                 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
 364                         return XFS_ERROR(EINVAL);
 365
 366                 /*
 367                  * For IRIX 6.5, shared mounts must have the shared
 368                  * version bit set, have the persistent readonly
 369                  * field set, must be version 0 and can only be mounted
 370                  * read-only.
 371                  */
 372                 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
 373                      (mp->m_sb.sb_shared_vn != 0))
 374                         return XFS_ERROR(EINVAL);
 375
 376                 mp->m_flags |= XFS_MOUNT_SHARED;
 377
 378                 /*
 379                  * Shared XFS V0 can't deal with DMI.  Return EINVAL.
 380                  */
 381                 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
 382                         return XFS_ERROR(EINVAL);
 383         }
 384
 385         return 0;
 386 }
 387
 388 /*
 389  * xfs_mount
 390  *
 391  * The file system configurations are:
 392  *      (1) device (partition) with data and internal log
 393  *      (2) logical volume with data and log subvolumes.
 394  *      (3) logical volume with data, log, and realtime subvolumes.
 395  *
 396  * We only have to handle opening the log and realtime volumes here if
 397  * they are present.  The data subvolume has already been opened by
 398  * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
 399  */
 400 STATIC int
 401 xfs_mount(
 402         struct bhv_desc         *bhvp,
 403         struct xfs_mount_args   *args,
 404         cred_t                  *credp)
 405 {
 406         struct vfs              *vfsp = bhvtovfs(bhvp);
 407         struct bhv_desc         *p;
 408         struct xfs_mount        *mp = XFS_BHVTOM(bhvp);
 409         struct block_device     *ddev, *logdev, *rtdev;
 410         int                     flags = 0, error;
 411
 412         ddev = vfsp->vfs_super->s_bdev;
 413         logdev = rtdev = NULL;
 414
 415         /*
 416          * Setup xfs_mount function vectors from available behaviors
 417          */
 418         p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
 419         mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
 420         p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
 421         mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
 422         p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
 423         mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
 424
 425         /*
 426          * Open real time and log devices - order is important.
 427          */
 428         if (args->logname[0]) {
 429                 error = xfs_blkdev_get(mp, args->logname, &logdev);
 430                 if (error)
 431                         return error;
 432         }
 433         if (args->rtname[0]) {
 434                 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
 435                 if (error) {
 436                         xfs_blkdev_put(logdev);
 437                         return error;
 438                 }
 439
 440                 if (rtdev == ddev || rtdev == logdev) {
 441                         cmn_err(CE_WARN,
 442         "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
 443                         xfs_blkdev_put(logdev);
 444                         xfs_blkdev_put(rtdev);
 445                         return EINVAL;
 446                 }
 447         }
 448
 449         /*
 450          * Setup xfs_mount buffer target pointers
 451          */
 452         error = ENOMEM;
 453         mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
 454         if (!mp->m_ddev_targp) {
 455                 xfs_blkdev_put(logdev);
 456                 xfs_blkdev_put(rtdev);
 457                 return error;
 458         }
 459         if (rtdev) {
 460                 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
 461                 if (!mp->m_rtdev_targp)
 462                         goto error0;
 463         }
 464         mp->m_logdev_targp = (logdev && logdev != ddev) ?
 465                                 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
 466         if (!mp->m_logdev_targp)
 467                 goto error0;
 468
 469         /*
 470          * Setup flags based on mount(2) options and then the superblock
 471          */
 472         error = xfs_start_flags(vfsp, args, mp);
 473         if (error)
 474                 goto error1;
 475         error = xfs_readsb(mp);
 476         if (error)
 477                 goto error1;
 478         error = xfs_finish_flags(vfsp, args, mp);
 479         if (error)
 480                 goto error2;
 481
 482         /*
 483          * Setup xfs_mount buffer target pointers based on superblock
 484          */
 485         error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
 486                                     mp->m_sb.sb_sectsize);
 487         if (!error && logdev && logdev != ddev) {
 488                 unsigned int    log_sector_size = BBSIZE;
 489
 490                 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
 491                         log_sector_size = mp->m_sb.sb_logsectsize;
 492                 error = xfs_setsize_buftarg(mp->m_logdev_targp,
 493                                             mp->m_sb.sb_blocksize,
 494                                             log_sector_size);
 495         }
 496         if (!error && rtdev)
 497                 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
 498                                             mp->m_sb.sb_blocksize,
 499                                             mp->m_sb.sb_sectsize);
 500         if (error)
 501                 goto error2;
 502
 503         error = XFS_IOINIT(vfsp, args, flags);
 504         if (error)
 505                 goto error2;
 506
 507         if ((args->flags & XFSMNT_BARRIER) &&
 508             !(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY))
 509                 xfs_mountfs_check_barriers(mp);
 510         return 0;
 511
 512 error2:
 513         if (mp->m_sb_bp)
 514                 xfs_freesb(mp);
 515 error1:
 516         xfs_binval(mp->m_ddev_targp);
 517         if (logdev && logdev != ddev)
 518                 xfs_binval(mp->m_logdev_targp);
 519         if (rtdev)
 520                 xfs_binval(mp->m_rtdev_targp);
 521 error0:
 522         xfs_unmountfs_close(mp, credp);
 523         return error;
 524 }
 525
 526 STATIC int
 527 xfs_unmount(
 528         bhv_desc_t      *bdp,
 529         int             flags,
 530         cred_t          *credp)
 531 {
 532         struct vfs      *vfsp = bhvtovfs(bdp);
 533         xfs_mount_t     *mp = XFS_BHVTOM(bdp);
 534         xfs_inode_t     *rip;
 535         vnode_t         *rvp;
 536         int             unmount_event_wanted = 0;
 537         int             unmount_event_flags = 0;
 538         int             xfs_unmountfs_needed = 0;
 539         int             error;
 540
 541         rip = mp->m_rootip;
 542         rvp = XFS_ITOV(rip);
 543
 544         if (vfsp->vfs_flag & VFS_DMI) {
 545                 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
 546                                 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
 547                                 NULL, NULL, 0, 0,
 548                                 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
 549                                         0:DM_FLAGS_UNWANTED);
 550                         if (error)
 551                                 return XFS_ERROR(error);
 552                 unmount_event_wanted = 1;
 553                 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
 554                                         0 : DM_FLAGS_UNWANTED;
 555         }
 556
 557         /*
 558          * First blow any referenced inode from this file system
 559          * out of the reference cache, and delete the timer.
 560          */
 561         xfs_refcache_purge_mp(mp);
 562
 563         XFS_bflush(mp->m_ddev_targp);
 564         error = xfs_unmount_flush(mp, 0);
 565         if (error)
 566                 goto out;
 567
 568         ASSERT(vn_count(rvp) == 1);
 569
 570         /*
 571          * Drop the reference count
 572          */
 573         VN_RELE(rvp);
 574
 575         /*
 576          * If we're forcing a shutdown, typically because of a media error,
 577          * we want to make sure we invalidate dirty pages that belong to
 578          * referenced vnodes as well.
 579          */
 580         if (XFS_FORCED_SHUTDOWN(mp)) {
 581                 error = xfs_sync(&mp->m_bhv,
 582                          (SYNC_WAIT | SYNC_CLOSE), credp);
 583                 ASSERT(error != EFSCORRUPTED);
 584         }
 585         xfs_unmountfs_needed = 1;
 586
 587 out:
 588         /*      Send DMAPI event, if required.
 589          *      Then do xfs_unmountfs() if needed.
 590          *      Then return error (or zero).
 591          */
 592         if (unmount_event_wanted) {
 593                 /* Note: mp structure must still exist for
 594                  * XFS_SEND_UNMOUNT() call.
 595                  */
 596                 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
 597                         DM_RIGHT_NULL, 0, error, unmount_event_flags);
 598         }
 599         if (xfs_unmountfs_needed) {
 600                 /*
 601                  * Call common unmount function to flush to disk
 602                  * and free the super block buffer & mount structures.
 603                  */
 604                 xfs_unmountfs(mp, credp);
 605         }
 606
 607         return XFS_ERROR(error);
 608 }
 609
 610 STATIC int
 611 xfs_quiesce_fs(
 612         xfs_mount_t             *mp)
 613 {
 614         int                     count = 0, pincount;
 615
 616         xfs_refcache_purge_mp(mp);
 617         xfs_flush_buftarg(mp->m_ddev_targp, 0);
 618         xfs_finish_reclaim_all(mp, 0);
 619
 620         /* This loop must run at least twice.
 621          * The first instance of the loop will flush
 622          * most meta data but that will generate more
 623          * meta data (typically directory updates).
 624          * Which then must be flushed and logged before
 625          * we can write the unmount record.
 626          */
 627         do {
 628                 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
 629                 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
 630                 if (!pincount) {
 631                         delay(50);
 632                         count++;
 633                 }
 634         } while (count < 2);
 635
 636         return 0;
 637 }
 638
 639 STATIC int
 640 xfs_mntupdate(
 641         bhv_desc_t                      *bdp,
 642         int                             *flags,
 643         struct xfs_mount_args           *args)
 644 {
 645         struct vfs      *vfsp = bhvtovfs(bdp);
 646         xfs_mount_t     *mp = XFS_BHVTOM(bdp);
 647         int             error;
 648
 649         if (args->flags & XFSMNT_NOATIME)
 650                 mp->m_flags |= XFS_MOUNT_NOATIME;
 651         else
 652                 mp->m_flags &= ~XFS_MOUNT_NOATIME;
 653
 654         if ((vfsp->vfs_flag & VFS_RDONLY) &&
 655             !(*flags & MS_RDONLY)) {
 656                 vfsp->vfs_flag &= ~VFS_RDONLY;
 657
 658                 if (args->flags & XFSMNT_BARRIER)
 659                         xfs_mountfs_check_barriers(mp);
 660         }
 661
 662         if (!(vfsp->vfs_flag & VFS_RDONLY) &&
 663             (*flags & MS_RDONLY)) {
 664                 VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
 665
 666                 xfs_quiesce_fs(mp);
 667
 668                 /* Ok now write out an unmount record */
 669                 xfs_log_unmount_write(mp);
 670                 xfs_unmountfs_writesb(mp);
 671                 vfsp->vfs_flag |= VFS_RDONLY;
 672         }
 673
 674         return 0;
 675 }
 676
 677 /*
 678  * xfs_unmount_flush implements a set of flush operation on special
 679  * inodes, which are needed as a separate set of operations so that
 680  * they can be called as part of relocation process.
 681  */
 682 int
 683 xfs_unmount_flush(
 684         xfs_mount_t     *mp,            /* Mount structure we are getting
 685                                            rid of. */
 686         int             relocation)     /* Called from vfs relocation. */
 687 {
 688         xfs_inode_t     *rip = mp->m_rootip;
 689         xfs_inode_t     *rbmip;
 690         xfs_inode_t     *rsumip = NULL;
 691         vnode_t         *rvp = XFS_ITOV(rip);
 692         int             error;
 693
 694         xfs_ilock(rip, XFS_ILOCK_EXCL);
 695         xfs_iflock(rip);
 696
 697         /*
 698          * Flush out the real time inodes.
 699          */
 700         if ((rbmip = mp->m_rbmip) != NULL) {
 701                 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
 702                 xfs_iflock(rbmip);
 703                 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
 704                 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
 705
 706                 if (error == EFSCORRUPTED)
 707                         goto fscorrupt_out;
 708
 709                 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
 710
 711                 rsumip = mp->m_rsumip;
 712                 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
 713                 xfs_iflock(rsumip);
 714                 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
 715                 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
 716
 717                 if (error == EFSCORRUPTED)
 718                         goto fscorrupt_out;
 719
 720                 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
 721         }
 722
 723         /*
 724          * Synchronously flush root inode to disk
 725          */
 726         error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
 727         if (error == EFSCORRUPTED)
 728                 goto fscorrupt_out2;
 729
 730         if (vn_count(rvp) != 1 && !relocation) {
 731                 xfs_iunlock(rip, XFS_ILOCK_EXCL);
 732                 return XFS_ERROR(EBUSY);
 733         }
 734
 735         /*
 736          * Release dquot that rootinode, rbmino and rsumino might be holding,
 737          * flush and purge the quota inodes.
 738          */
 739         error = XFS_QM_UNMOUNT(mp);
 740         if (error == EFSCORRUPTED)
 741                 goto fscorrupt_out2;
 742
 743         if (rbmip) {
 744                 VN_RELE(XFS_ITOV(rbmip));
 745                 VN_RELE(XFS_ITOV(rsumip));
 746         }
 747
 748         xfs_iunlock(rip, XFS_ILOCK_EXCL);
 749         return 0;
 750
 751 fscorrupt_out:
 752         xfs_ifunlock(rip);
 753
 754 fscorrupt_out2:
 755         xfs_iunlock(rip, XFS_ILOCK_EXCL);
 756
 757         return XFS_ERROR(EFSCORRUPTED);
 758 }
 759
 760 /*
 761  * xfs_root extracts the root vnode from a vfs.
 762  *
 763  * vfsp -- the vfs struct for the desired file system
 764  * vpp  -- address of the caller's vnode pointer which should be
 765  *         set to the desired fs root vnode
 766  */
 767 STATIC int
 768 xfs_root(
 769         bhv_desc_t      *bdp,
 770         vnode_t         **vpp)
 771 {
 772         vnode_t         *vp;
 773
 774         vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
 775         VN_HOLD(vp);
 776         *vpp = vp;
 777         return 0;
 778 }
 779
 780 /*
 781  * xfs_statvfs
 782  *
 783  * Fill in the statvfs structure for the given file system.  We use
 784  * the superblock lock in the mount structure to ensure a consistent
 785  * snapshot of the counters returned.
 786  */
 787 STATIC int
 788 xfs_statvfs(
 789         bhv_desc_t      *bdp,
 790         xfs_statfs_t    *statp,
 791         vnode_t         *vp)
 792 {
 793         __uint64_t      fakeinos;
 794         xfs_extlen_t    lsize;
 795         xfs_mount_t     *mp;
 796         xfs_sb_t        *sbp;
 797         unsigned long   s;
 798
 799         mp = XFS_BHVTOM(bdp);
 800         sbp = &(mp->m_sb);
 801
 802         statp->f_type = XFS_SB_MAGIC;
 803
 804         s = XFS_SB_LOCK(mp);
 805         statp->f_bsize = sbp->sb_blocksize;
 806         lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
 807         statp->f_blocks = sbp->sb_dblocks - lsize;
 808         statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
 809         fakeinos = statp->f_bfree << sbp->sb_inopblog;
 810 #if XFS_BIG_INUMS
 811         fakeinos += mp->m_inoadd;
 812 #endif
 813         statp->f_files =
 814             MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
 815         if (mp->m_maxicount)
 816 #if XFS_BIG_INUMS
 817                 if (!mp->m_inoadd)
 818 #endif
 819                         statp->f_files = min_t(typeof(statp->f_files),
 820                                                 statp->f_files,
 821                                                 mp->m_maxicount);
 822         statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
 823         XFS_SB_UNLOCK(mp, s);
 824
 825         xfs_statvfs_fsid(statp, mp);
 826         statp->f_namelen = MAXNAMELEN - 1;
 827
 828         return 0;
 829 }
 830
 831
 832 /*
 833  * xfs_sync flushes any pending I/O to file system vfsp.
 834  *
 835  * This routine is called by vfs_sync() to make sure that things make it
 836  * out to disk eventually, on sync() system calls to flush out everything,
 837  * and when the file system is unmounted.  For the vfs_sync() case, all
 838  * we really need to do is sync out the log to make all of our meta-data
 839  * updates permanent (except for timestamps).  For calls from pflushd(),
 840  * dirty pages are kept moving by calling pdflush() on the inodes
 841  * containing them.  We also flush the inodes that we can lock without
 842  * sleeping and the superblock if we can lock it without sleeping from
 843  * vfs_sync() so that items at the tail of the log are always moving out.
 844  *
 845  * Flags:
 846  *      SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
 847  *                     to sleep if we can help it.  All we really need
 848  *                     to do is ensure that the log is synced at least
 849  *                     periodically.  We also push the inodes and
 850  *                     superblock if we can lock them without sleeping
 851  *                      and they are not pinned.
 852  *      SYNC_ATTR    - We need to flush the inodes.  If SYNC_BDFLUSH is not
 853  *                     set, then we really want to lock each inode and flush
 854  *                     it.
 855  *      SYNC_WAIT    - All the flushes that take place in this call should
 856  *                     be synchronous.
 857  *      SYNC_DELWRI  - This tells us to push dirty pages associated with
 858  *                     inodes.  SYNC_WAIT and SYNC_BDFLUSH are used to
 859  *                     determine if they should be flushed sync, async, or
 860  *                     delwri.
 861  *      SYNC_CLOSE   - This flag is passed when the system is being
 862  *                     unmounted.  We should sync and invalidate everthing.
 863  *      SYNC_FSDATA  - This indicates that the caller would like to make
 864  *                     sure the superblock is safe on disk.  We can ensure
 865  *                     this by simply makeing sure the log gets flushed
 866  *                     if SYNC_BDFLUSH is set, and by actually writing it
 867  *                     out otherwise.
 868  *
 869  */
 870 /*ARGSUSED*/
 871 STATIC int
 872 xfs_sync(
 873         bhv_desc_t      *bdp,
 874         int             flags,
 875         cred_t          *credp)
 876 {
 877         xfs_mount_t     *mp = XFS_BHVTOM(bdp);
 878
 879         if (unlikely(flags == SYNC_QUIESCE))
 880                 return xfs_quiesce_fs(mp);
 881         else
 882                 return xfs_syncsub(mp, flags, 0, NULL);
 883 }
 884
 885 /*
 886  * xfs sync routine for internal use
 887  *
 888  * This routine supports all of the flags defined for the generic VFS_SYNC
 889  * interface as explained above under xfs_sync.  In the interests of not
 890  * changing interfaces within the 6.5 family, additional internallly-
 891  * required functions are specified within a separate xflags parameter,
 892  * only available by calling this routine.
 893  *
 894  */
 895 int
 896 xfs_sync_inodes(
 897         xfs_mount_t     *mp,
 898         int             flags,
 899         int             xflags,
 900         int             *bypassed)
 901 {
 902         xfs_inode_t     *ip = NULL;
 903         xfs_inode_t     *ip_next;
 904         xfs_buf_t       *bp;
 905         vnode_t         *vp = NULL;
 906         int             error;
 907         int             last_error;
 908         uint64_t        fflag;
 909         uint            lock_flags;
 910         uint            base_lock_flags;
 911         boolean_t       mount_locked;
 912         boolean_t       vnode_refed;
 913         int             preempt;
 914         xfs_dinode_t    *dip;
 915         xfs_iptr_t      *ipointer;
 916 #ifdef DEBUG
 917         boolean_t       ipointer_in = B_FALSE;
 918
 919 #define IPOINTER_SET    ipointer_in = B_TRUE
 920 #define IPOINTER_CLR    ipointer_in = B_FALSE
 921 #else
 922 #define IPOINTER_SET
 923 #define IPOINTER_CLR
 924 #endif
 925
 926
 927 /* Insert a marker record into the inode list after inode ip. The list
 928  * must be locked when this is called. After the call the list will no
 929  * longer be locked.
 930  */
 931 #define IPOINTER_INSERT(ip, mp) { \
 932                 ASSERT(ipointer_in == B_FALSE); \
 933                 ipointer->ip_mnext = ip->i_mnext; \
 934                 ipointer->ip_mprev = ip; \
 935                 ip->i_mnext = (xfs_inode_t *)ipointer; \
 936                 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
 937                 preempt = 0; \
 938                 XFS_MOUNT_IUNLOCK(mp); \
 939                 mount_locked = B_FALSE; \
 940                 IPOINTER_SET; \
 941         }
 942
 943 /* Remove the marker from the inode list. If the marker was the only item
 944  * in the list then there are no remaining inodes and we should zero out
 945  * the whole list. If we are the current head of the list then move the head
 946  * past us.
 947  */
 948 #define IPOINTER_REMOVE(ip, mp) { \
 949                 ASSERT(ipointer_in == B_TRUE); \
 950                 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
 951                         ip = ipointer->ip_mnext; \
 952                         ip->i_mprev = ipointer->ip_mprev; \
 953                         ipointer->ip_mprev->i_mnext = ip; \
 954                         if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
 955                                 mp->m_inodes = ip; \
 956                         } \
 957                 } else { \
 958                         ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
 959                         mp->m_inodes = NULL; \
 960                         ip = NULL; \
 961                 } \
 962                 IPOINTER_CLR; \
 963         }
 964
 965 #define XFS_PREEMPT_MASK        0x7f
 966
 967         if (bypassed)
 968                 *bypassed = 0;
 969         if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
 970                 return 0;
 971         error = 0;
 972         last_error = 0;
 973         preempt = 0;
 974
 975         /* Allocate a reference marker */
 976         ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
 977
 978         fflag = XFS_B_ASYNC;            /* default is don't wait */
 979         if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
 980                 fflag = XFS_B_DELWRI;
 981         if (flags & SYNC_WAIT)
 982                 fflag = 0;              /* synchronous overrides all */
 983
 984         base_lock_flags = XFS_ILOCK_SHARED;
 985         if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
 986                 /*
 987                  * We need the I/O lock if we're going to call any of
 988                  * the flush/inval routines.
 989                  */
 990                 base_lock_flags |= XFS_IOLOCK_SHARED;
 991         }
 992
 993         XFS_MOUNT_ILOCK(mp);
 994
 995         ip = mp->m_inodes;
 996
 997         mount_locked = B_TRUE;
 998         vnode_refed  = B_FALSE;
 999
1000         IPOINTER_CLR;
1001
1002         do {
1003                 ASSERT(ipointer_in == B_FALSE);
1004                 ASSERT(vnode_refed == B_FALSE);
1005
1006                 lock_flags = base_lock_flags;
1007
1008                 /*
1009                  * There were no inodes in the list, just break out
1010                  * of the loop.
1011                  */
1012                 if (ip == NULL) {
1013                         break;
1014                 }
1015
1016                 /*
1017                  * We found another sync thread marker - skip it
1018                  */
1019                 if (ip->i_mount == NULL) {
1020                         ip = ip->i_mnext;
1021                         continue;
1022                 }
1023
1024                 vp = XFS_ITOV_NULL(ip);
1025
1026                 /*
1027                  * If the vnode is gone then this is being torn down,
1028                  * call reclaim if it is flushed, else let regular flush
1029                  * code deal with it later in the loop.
1030                  */
1031
1032                 if (vp == NULL) {
1033                         /* Skip ones already in reclaim */
1034                         if (ip->i_flags & XFS_IRECLAIM) {
1035                                 ip = ip->i_mnext;
1036                                 continue;
1037                         }
1038                         if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1039                                 ip = ip->i_mnext;
1040                         } else if ((xfs_ipincount(ip) == 0) &&
1041                                     xfs_iflock_nowait(ip)) {
1042                                 IPOINTER_INSERT(ip, mp);
1043
1044                                 xfs_finish_reclaim(ip, 1,
1045                                                 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1046
1047                                 XFS_MOUNT_ILOCK(mp);
1048                                 mount_locked = B_TRUE;
1049                                 IPOINTER_REMOVE(ip, mp);
1050                         } else {
1051                                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1052                                 ip = ip->i_mnext;
1053                         }
1054                         continue;
1055                 }
1056
1057                 if (VN_BAD(vp)) {
1058                         ip = ip->i_mnext;
1059                         continue;
1060                 }
1061
1062                 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1063                         XFS_MOUNT_IUNLOCK(mp);
1064                         kmem_free(ipointer, sizeof(xfs_iptr_t));
1065                         return 0;
1066                 }
1067
1068                 /*
1069                  * If this is just vfs_sync() or pflushd() calling
1070                  * then we can skip inodes for which it looks like
1071                  * there is nothing to do.  Since we don't have the
1072                  * inode locked this is racey, but these are periodic
1073                  * calls so it doesn't matter.  For the others we want
1074                  * to know for sure, so we at least try to lock them.
1075                  */
1076                 if (flags & SYNC_BDFLUSH) {
1077                         if (((ip->i_itemp == NULL) ||
1078                              !(ip->i_itemp->ili_format.ilf_fields &
1079                                XFS_ILOG_ALL)) &&
1080                             (ip->i_update_core == 0)) {
1081                                 ip = ip->i_mnext;
1082                                 continue;
1083                         }
1084                 }
1085
1086                 /*
1087                  * Try to lock without sleeping.  We're out of order with
1088                  * the inode list lock here, so if we fail we need to drop
1089                  * the mount lock and try again.  If we're called from
1090                  * bdflush() here, then don't bother.
1091                  *
1092                  * The inode lock here actually coordinates with the
1093                  * almost spurious inode lock in xfs_ireclaim() to prevent
1094                  * the vnode we handle here without a reference from
1095                  * being freed while we reference it.  If we lock the inode
1096                  * while it's on the mount list here, then the spurious inode
1097                  * lock in xfs_ireclaim() after the inode is pulled from
1098                  * the mount list will sleep until we release it here.
1099                  * This keeps the vnode from being freed while we reference
1100                  * it.
1101                  */
1102                 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1103                         if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1104                                 ip = ip->i_mnext;
1105                                 continue;
1106                         }
1107
1108                         vp = vn_grab(vp);
1109                         if (vp == NULL) {
1110                                 ip = ip->i_mnext;
1111                                 continue;
1112                         }
1113
1114                         IPOINTER_INSERT(ip, mp);
1115                         xfs_ilock(ip, lock_flags);
1116
1117                         ASSERT(vp == XFS_ITOV(ip));
1118                         ASSERT(ip->i_mount == mp);
1119
1120                         vnode_refed = B_TRUE;
1121                 }
1122
1123                 /* From here on in the loop we may have a marker record
1124                  * in the inode list.
1125                  */
1126
1127                 if ((flags & SYNC_CLOSE)  && (vp != NULL)) {
1128                         /*
1129                          * This is the shutdown case.  We just need to
1130                          * flush and invalidate all the pages associated
1131                          * with the inode.  Drop the inode lock since
1132                          * we can't hold it across calls to the buffer
1133                          * cache.
1134                          *
1135                          * We don't set the VREMAPPING bit in the vnode
1136                          * here, because we don't hold the vnode lock
1137                          * exclusively.  It doesn't really matter, though,
1138                          * because we only come here when we're shutting
1139                          * down anyway.
1140                          */
1141                         xfs_iunlock(ip, XFS_ILOCK_SHARED);
1142
1143                         if (XFS_FORCED_SHUTDOWN(mp)) {
1144                                 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1145                         } else {
1146                                 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1147                         }
1148
1149                         xfs_ilock(ip, XFS_ILOCK_SHARED);
1150
1151                 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1152                         if (VN_DIRTY(vp)) {
1153                                 /* We need to have dropped the lock here,
1154                                  * so insert a marker if we have not already
1155                                  * done so.
1156                                  */
1157                                 if (mount_locked) {
1158                                         IPOINTER_INSERT(ip, mp);
1159                                 }
1160
1161                                 /*
1162                                  * Drop the inode lock since we can't hold it
1163                                  * across calls to the buffer cache.
1164                                  */
1165                                 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1166                                 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1167                                                         fflag, FI_NONE, error);
1168                                 xfs_ilock(ip, XFS_ILOCK_SHARED);
1169                         }
1170
1171                 }
1172
1173                 if (flags & SYNC_BDFLUSH) {
1174                         if ((flags & SYNC_ATTR) &&
1175                             ((ip->i_update_core) ||
1176                              ((ip->i_itemp != NULL) &&
1177                               (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1178
1179                                 /* Insert marker and drop lock if not already
1180                                  * done.
1181                                  */
1182                                 if (mount_locked) {
1183                                         IPOINTER_INSERT(ip, mp);
1184                                 }
1185
1186                                 /*
1187                                  * We don't want the periodic flushing of the
1188                                  * inodes by vfs_sync() to interfere with
1189                                  * I/O to the file, especially read I/O
1190                                  * where it is only the access time stamp
1191                                  * that is being flushed out.  To prevent
1192                                  * long periods where we have both inode
1193                                  * locks held shared here while reading the
1194                                  * inode's buffer in from disk, we drop the
1195                                  * inode lock while reading in the inode
1196                                  * buffer.  We have to release the buffer
1197                                  * and reacquire the inode lock so that they
1198                                  * are acquired in the proper order (inode
1199                                  * locks first).  The buffer will go at the
1200                                  * end of the lru chain, though, so we can
1201                                  * expect it to still be there when we go
1202                                  * for it again in xfs_iflush().
1203                                  */
1204                                 if ((xfs_ipincount(ip) == 0) &&
1205                                     xfs_iflock_nowait(ip)) {
1206
1207                                         xfs_ifunlock(ip);
1208                                         xfs_iunlock(ip, XFS_ILOCK_SHARED);
1209
1210                                         error = xfs_itobp(mp, NULL, ip,
1211                                                           &dip, &bp, 0);
1212                                         if (!error) {
1213                                                 xfs_buf_relse(bp);
1214                                         } else {
1215                                                 /* Bailing out, remove the
1216                                                  * marker and free it.
1217                                                  */
1218                                                 XFS_MOUNT_ILOCK(mp);
1219
1220                                                 IPOINTER_REMOVE(ip, mp);
1221
1222                                                 XFS_MOUNT_IUNLOCK(mp);
1223
1224                                                 ASSERT(!(lock_flags &
1225                                                         XFS_IOLOCK_SHARED));
1226
1227                                                 kmem_free(ipointer,
1228                                                         sizeof(xfs_iptr_t));
1229                                                 return (0);
1230                                         }
1231
1232                                         /*
1233                                          * Since we dropped the inode lock,
1234                                          * the inode may have been reclaimed.
1235                                          * Therefore, we reacquire the mount
1236                                          * lock and check to see if we were the
1237                                          * inode reclaimed. If this happened
1238                                          * then the ipointer marker will no
1239                                          * longer point back at us. In this
1240                                          * case, move ip along to the inode
1241                                          * after the marker, remove the marker
1242                                          * and continue.
1243                                          */
1244                                         XFS_MOUNT_ILOCK(mp);
1245                                         mount_locked = B_TRUE;
1246
1247                                         if (ip != ipointer->ip_mprev) {
1248                                                 IPOINTER_REMOVE(ip, mp);
1249
1250                                                 ASSERT(!vnode_refed);
1251                                                 ASSERT(!(lock_flags &
1252                                                         XFS_IOLOCK_SHARED));
1253                                                 continue;
1254                                         }
1255
1256                                         ASSERT(ip->i_mount == mp);
1257
1258                                         if (xfs_ilock_nowait(ip,
1259                                                     XFS_ILOCK_SHARED) == 0) {
1260                                                 ASSERT(ip->i_mount == mp);
1261                                                 /*
1262                                                  * We failed to reacquire
1263                                                  * the inode lock without
1264                                                  * sleeping, so just skip
1265                                                  * the inode for now.  We
1266                                                  * clear the ILOCK bit from
1267                                                  * the lock_flags so that we
1268                                                  * won't try to drop a lock
1269                                                  * we don't hold below.
1270                                                  */
1271                                                 lock_flags &= ~XFS_ILOCK_SHARED;
1272                                                 IPOINTER_REMOVE(ip_next, mp);
1273                                         } else if ((xfs_ipincount(ip) == 0) &&
1274                                                    xfs_iflock_nowait(ip)) {
1275                                                 ASSERT(ip->i_mount == mp);
1276                                                 /*
1277                                                  * Since this is vfs_sync()
1278                                                  * calling we only flush the
1279                                                  * inode out if we can lock
1280                                                  * it without sleeping and
1281                                                  * it is not pinned.  Drop
1282                                                  * the mount lock here so
1283                                                  * that we don't hold it for
1284                                                  * too long. We already have
1285                                                  * a marker in the list here.
1286                                                  */
1287                                                 XFS_MOUNT_IUNLOCK(mp);
1288                                                 mount_locked = B_FALSE;
1289                                                 error = xfs_iflush(ip,
1290                                                            XFS_IFLUSH_DELWRI);
1291                                         } else {
1292                                                 ASSERT(ip->i_mount == mp);
1293                                                 IPOINTER_REMOVE(ip_next, mp);
1294                                         }
1295                                 }
1296
1297                         }
1298
1299                 } else {
1300                         if ((flags & SYNC_ATTR) &&
1301                             ((ip->i_update_core) ||
1302                              ((ip->i_itemp != NULL) &&
1303                               (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1304                                 if (mount_locked) {
1305                                         IPOINTER_INSERT(ip, mp);
1306                                 }
1307
1308                                 if (flags & SYNC_WAIT) {
1309                                         xfs_iflock(ip);
1310                                         error = xfs_iflush(ip,
1311                                                            XFS_IFLUSH_SYNC);
1312                                 } else {
1313                                         /*
1314                                          * If we can't acquire the flush
1315                                          * lock, then the inode is already
1316                                          * being flushed so don't bother
1317                                          * waiting.  If we can lock it then
1318                                          * do a delwri flush so we can
1319                                          * combine multiple inode flushes
1320                                          * in each disk write.
1321                                          */
1322                                         if (xfs_iflock_nowait(ip)) {
1323                                                 error = xfs_iflush(ip,
1324                                                            XFS_IFLUSH_DELWRI);
1325                                         }
1326                                         else if (bypassed)
1327                                                 (*bypassed)++;
1328                                 }
1329                         }
1330                 }
1331
1332                 if (lock_flags != 0) {
1333                         xfs_iunlock(ip, lock_flags);
1334                 }
1335
1336                 if (vnode_refed) {
1337                         /*
1338                          * If we had to take a reference on the vnode
1339                          * above, then wait until after we've unlocked
1340                          * the inode to release the reference.  This is
1341                          * because we can be already holding the inode
1342                          * lock when VN_RELE() calls xfs_inactive().
1343                          *
1344                          * Make sure to drop the mount lock before calling
1345                          * VN_RELE() so that we don't trip over ourselves if
1346                          * we have to go for the mount lock again in the
1347                          * inactive code.
1348                          */
1349                         if (mount_locked) {
1350                                 IPOINTER_INSERT(ip, mp);
1351                         }
1352
1353                         VN_RELE(vp);
1354
1355                         vnode_refed = B_FALSE;
1356                 }
1357
1358                 if (error) {
1359                         last_error = error;
1360                 }
1361
1362                 /*
1363                  * bail out if the filesystem is corrupted.
1364                  */
1365                 if (error == EFSCORRUPTED)  {
1366                         if (!mount_locked) {
1367                                 XFS_MOUNT_ILOCK(mp);
1368                                 IPOINTER_REMOVE(ip, mp);
1369                         }
1370                         XFS_MOUNT_IUNLOCK(mp);
1371                         ASSERT(ipointer_in == B_FALSE);
1372                         kmem_free(ipointer, sizeof(xfs_iptr_t));
1373                         return XFS_ERROR(error);
1374                 }
1375
1376                 /* Let other threads have a chance at the mount lock
1377                  * if we have looped many times without dropping the
1378                  * lock.
1379                  */
1380                 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1381                         if (mount_locked) {
1382                                 IPOINTER_INSERT(ip, mp);
1383                         }
1384                 }
1385
1386                 if (mount_locked == B_FALSE) {
1387                         XFS_MOUNT_ILOCK(mp);
1388                         mount_locked = B_TRUE;
1389                         IPOINTER_REMOVE(ip, mp);
1390                         continue;
1391                 }
1392
1393                 ASSERT(ipointer_in == B_FALSE);
1394                 ip = ip->i_mnext;
1395
1396         } while (ip != mp->m_inodes);
1397
1398         XFS_MOUNT_IUNLOCK(mp);
1399
1400         ASSERT(ipointer_in == B_FALSE);
1401
1402         kmem_free(ipointer, sizeof(xfs_iptr_t));
1403         return XFS_ERROR(last_error);
1404 }
1405
1406 /*
1407  * xfs sync routine for internal use
1408  *
1409  * This routine supports all of the flags defined for the generic VFS_SYNC
1410  * interface as explained above under xfs_sync.  In the interests of not
1411  * changing interfaces within the 6.5 family, additional internallly-
1412  * required functions are specified within a separate xflags parameter,
1413  * only available by calling this routine.
1414  *
1415  */
1416 int
1417 xfs_syncsub(
1418         xfs_mount_t     *mp,
1419         int             flags,
1420         int             xflags,
1421         int             *bypassed)
1422 {
1423         int             error = 0;
1424         int             last_error = 0;
1425         uint            log_flags = XFS_LOG_FORCE;
1426         xfs_buf_t       *bp;
1427         xfs_buf_log_item_t      *bip;
1428
1429         /*
1430          * Sync out the log.  This ensures that the log is periodically
1431          * flushed even if there is not enough activity to fill it up.
1432          */
1433         if (flags & SYNC_WAIT)
1434                 log_flags |= XFS_LOG_SYNC;
1435
1436         xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1437
1438         if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1439                 if (flags & SYNC_BDFLUSH)
1440                         xfs_finish_reclaim_all(mp, 1);
1441                 else
1442                         error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1443         }
1444
1445         /*
1446          * Flushing out dirty data above probably generated more
1447          * log activity, so if this isn't vfs_sync() then flush
1448          * the log again.
1449          */
1450         if (flags & SYNC_DELWRI) {
1451                 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1452         }
1453
1454         if (flags & SYNC_FSDATA) {
1455                 /*
1456                  * If this is vfs_sync() then only sync the superblock
1457                  * if we can lock it without sleeping and it is not pinned.
1458                  */
1459                 if (flags & SYNC_BDFLUSH) {
1460                         bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1461                         if (bp != NULL) {
1462                                 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1463                                 if ((bip != NULL) &&
1464                                     xfs_buf_item_dirty(bip)) {
1465                                         if (!(XFS_BUF_ISPINNED(bp))) {
1466                                                 XFS_BUF_ASYNC(bp);
1467                                                 error = xfs_bwrite(mp, bp);
1468                                         } else {
1469                                                 xfs_buf_relse(bp);
1470                                         }
1471                                 } else {
1472                                         xfs_buf_relse(bp);
1473                                 }
1474                         }
1475                 } else {
1476                         bp = xfs_getsb(mp, 0);
1477                         /*
1478                          * If the buffer is pinned then push on the log so
1479                          * we won't get stuck waiting in the write for
1480                          * someone, maybe ourselves, to flush the log.
1481                          * Even though we just pushed the log above, we
1482                          * did not have the superblock buffer locked at
1483                          * that point so it can become pinned in between
1484                          * there and here.
1485                          */
1486                         if (XFS_BUF_ISPINNED(bp))
1487                                 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1488                         if (flags & SYNC_WAIT)
1489                                 XFS_BUF_UNASYNC(bp);
1490                         else
1491                                 XFS_BUF_ASYNC(bp);
1492                         error = xfs_bwrite(mp, bp);
1493                 }
1494                 if (error) {
1495                         last_error = error;
1496                 }
1497         }
1498
1499         /*
1500          * If this is the periodic sync, then kick some entries out of
1501          * the reference cache.  This ensures that idle entries are
1502          * eventually kicked out of the cache.
1503          */
1504         if (flags & SYNC_REFCACHE) {
1505                 if (flags & SYNC_WAIT)
1506                         xfs_refcache_purge_mp(mp);
1507                 else
1508                         xfs_refcache_purge_some(mp);
1509         }
1510
1511         /*
1512          * Now check to see if the log needs a "dummy" transaction.
1513          */
1514
1515         if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1516                 xfs_trans_t *tp;
1517                 xfs_inode_t *ip;
1518
1519                 /*
1520                  * Put a dummy transaction in the log to tell
1521                  * recovery that all others are OK.
1522                  */
1523                 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1524                 if ((error = xfs_trans_reserve(tp, 0,
1525                                 XFS_ICHANGE_LOG_RES(mp),
1526                                 0, 0, 0)))  {
1527                         xfs_trans_cancel(tp, 0);
1528                         return error;
1529                 }
1530
1531                 ip = mp->m_rootip;
1532                 xfs_ilock(ip, XFS_ILOCK_EXCL);
1533
1534                 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1535                 xfs_trans_ihold(tp, ip);
1536                 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1537                 error = xfs_trans_commit(tp, 0, NULL);
1538                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1539                 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1540         }
1541
1542         /*
1543          * When shutting down, we need to insure that the AIL is pushed
1544          * to disk or the filesystem can appear corrupt from the PROM.
1545          */
1546         if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1547                 XFS_bflush(mp->m_ddev_targp);
1548                 if (mp->m_rtdev_targp) {
1549                         XFS_bflush(mp->m_rtdev_targp);
1550                 }
1551         }
1552
1553         return XFS_ERROR(last_error);
1554 }
1555
1556 /*
1557  * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1558  */
1559 STATIC int
1560 xfs_vget(
1561         bhv_desc_t      *bdp,
1562         vnode_t         **vpp,
1563         fid_t           *fidp)
1564 {
1565         xfs_mount_t     *mp = XFS_BHVTOM(bdp);
1566         xfs_fid_t       *xfid = (struct xfs_fid *)fidp;
1567         xfs_inode_t     *ip;
1568         int             error;
1569         xfs_ino_t       ino;
1570         unsigned int    igen;
1571
1572         /*
1573          * Invalid.  Since handles can be created in user space and passed in
1574          * via gethandle(), this is not cause for a panic.
1575          */
1576         if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1577                 return XFS_ERROR(EINVAL);
1578
1579         ino  = xfid->xfs_fid_ino;
1580         igen = xfid->xfs_fid_gen;
1581
1582         /*
1583          * NFS can sometimes send requests for ino 0.  Fail them gracefully.
1584          */
1585         if (ino == 0)
1586                 return XFS_ERROR(ESTALE);
1587
1588         error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1589         if (error) {
1590                 *vpp = NULL;
1591                 return error;
1592         }
1593
1594         if (ip == NULL) {
1595                 *vpp = NULL;
1596                 return XFS_ERROR(EIO);
1597         }
1598
1599         if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1600                 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1601                 *vpp = NULL;
1602                 return XFS_ERROR(ENOENT);
1603         }
1604
1605         *vpp = XFS_ITOV(ip);
1606         xfs_iunlock(ip, XFS_ILOCK_SHARED);
1607         return 0;
1608 }
1609
1610
1611 #define MNTOPT_LOGBUFS  "logbufs"       /* number of XFS log buffers */
1612 #define MNTOPT_LOGBSIZE "logbsize"      /* size of XFS log buffers */
1613 #define MNTOPT_LOGDEV   "logdev"        /* log device */
1614 #define MNTOPT_RTDEV    "rtdev"         /* realtime I/O device */
1615 #define MNTOPT_BIOSIZE  "biosize"       /* log2 of preferred buffered io size */
1616 #define MNTOPT_WSYNC    "wsync"         /* safe-mode nfs compatible mount */
1617 #define MNTOPT_INO64    "ino64"         /* force inodes into 64-bit range */
1618 #define MNTOPT_NOALIGN  "noalign"       /* turn off stripe alignment */
1619 #define MNTOPT_SWALLOC  "swalloc"       /* turn on stripe width allocation */
1620 #define MNTOPT_SUNIT    "sunit"         /* data volume stripe unit */
1621 #define MNTOPT_SWIDTH   "swidth"        /* data volume stripe width */
1622 #define MNTOPT_NOUUID   "nouuid"        /* ignore filesystem UUID */
1623 #define MNTOPT_MTPT     "mtpt"          /* filesystem mount point */
1624 #define MNTOPT_GRPID    "grpid"         /* group-ID from parent directory */
1625 #define MNTOPT_NOGRPID  "nogrpid"       /* group-ID from current process */
1626 #define MNTOPT_BSDGROUPS    "bsdgroups"    /* group-ID from parent directory */
1627 #define MNTOPT_SYSVGROUPS   "sysvgroups"   /* group-ID from current process */
1628 #define MNTOPT_ALLOCSIZE    "allocsize"    /* preferred allocation size */
1629 #define MNTOPT_IHASHSIZE    "ihashsize"    /* size of inode hash table */
1630 #define MNTOPT_NORECOVERY   "norecovery"   /* don't run XFS recovery */
1631 #define MNTOPT_BARRIER  "barrier"       /* use writer barriers for log write and
1632                                          * unwritten extent conversion */
1633 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1634 #define MNTOPT_64BITINODE   "inode64"   /* inodes can be allocated anywhere */
1635 #define MNTOPT_IKEEP    "ikeep"         /* do not free empty inode clusters */
1636 #define MNTOPT_NOIKEEP  "noikeep"       /* free empty inode clusters */
1637 #define MNTOPT_LARGEIO     "largeio"    /* report large I/O sizes in stat() */
1638 #define MNTOPT_NOLARGEIO   "nolargeio"  /* do not report large I/O sizes
1639                                          * in stat(). */
1640 #define MNTOPT_ATTR2    "attr2"         /* do use attr2 attribute format */
1641 #define MNTOPT_NOATTR2  "noattr2"       /* do not use attr2 attribute format */
1642
1643 STATIC unsigned long
1644 suffix_strtoul(const char *cp, char **endp, unsigned int base)
1645 {
1646         int     last, shift_left_factor = 0;
1647         char    *value = (char *)cp;
1648
1649         last = strlen(value) - 1;
1650         if (value[last] == 'K' || value[last] == 'k') {
1651                 shift_left_factor = 10;
1652                 value[last] = '\0';
1653         }
1654         if (value[last] == 'M' || value[last] == 'm') {
1655                 shift_left_factor = 20;
1656                 value[last] = '\0';
1657         }
1658         if (value[last] == 'G' || value[last] == 'g') {
1659                 shift_left_factor = 30;
1660                 value[last] = '\0';
1661         }
1662
1663         return simple_strtoul(cp, endp, base) << shift_left_factor;
1664 }
1665
1666 STATIC int
1667 xfs_parseargs(
1668         struct bhv_desc         *bhv,
1669         char                    *options,
1670         struct xfs_mount_args   *args,
1671         int                     update)
1672 {
1673         struct vfs              *vfsp = bhvtovfs(bhv);
1674         char                    *this_char, *value, *eov;
1675         int                     dsunit, dswidth, vol_dsunit, vol_dswidth;
1676         int                     iosize;
1677
1678         args->flags |= XFSMNT_COMPAT_IOSIZE;
1679 #if 0   /* XXX: off by default, until some remaining issues ironed out */
1680         args->flags |= XFSMNT_IDELETE; /* default to on */
1681 #endif
1682
1683         if (!options)
1684                 return 0;
1685
1686         iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1687
1688         while ((this_char = strsep(&options, ",")) != NULL) {
1689                 if (!*this_char)
1690                         continue;
1691                 if ((value = strchr(this_char, '=')) != NULL)
1692                         *value++ = 0;
1693
1694                 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1695                         if (!value || !*value) {
1696                                 printk("XFS: %s option requires an argument\n",
1697                                         this_char);
1698                                 return EINVAL;
1699                         }
1700                         args->logbufs = simple_strtoul(value, &eov, 10);
1701                 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1702                         if (!value || !*value) {
1703                                 printk("XFS: %s option requires an argument\n",
1704                                         this_char);
1705                                 return EINVAL;
1706                         }
1707                         args->logbufsize = suffix_strtoul(value, &eov, 10);
1708                 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1709                         if (!value || !*value) {
1710                                 printk("XFS: %s option requires an argument\n",
1711                                         this_char);
1712                                 return EINVAL;
1713                         }
1714                         strncpy(args->logname, value, MAXNAMELEN);
1715                 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1716                         if (!value || !*value) {
1717                                 printk("XFS: %s option requires an argument\n",
1718                                         this_char);
1719                                 return EINVAL;
1720                         }
1721                         strncpy(args->mtpt, value, MAXNAMELEN);
1722                 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1723                         if (!value || !*value) {
1724                                 printk("XFS: %s option requires an argument\n",
1725                                         this_char);
1726                                 return EINVAL;
1727                         }
1728                         strncpy(args->rtname, value, MAXNAMELEN);
1729                 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1730                         if (!value || !*value) {
1731                                 printk("XFS: %s option requires an argument\n",
1732                                         this_char);
1733                                 return EINVAL;
1734                         }
1735                         iosize = simple_strtoul(value, &eov, 10);
1736                         args->flags |= XFSMNT_IOSIZE;
1737                         args->iosizelog = (uint8_t) iosize;
1738                 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1739                         if (!value || !*value) {
1740                                 printk("XFS: %s option requires an argument\n",
1741                                         this_char);
1742                                 return EINVAL;
1743                         }
1744                         iosize = suffix_strtoul(value, &eov, 10);
1745                         args->flags |= XFSMNT_IOSIZE;
1746                         args->iosizelog = ffs(iosize) - 1;
1747                 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1748                         if (!value || !*value) {
1749                                 printk("XFS: %s option requires an argument\n",
1750                                         this_char);
1751                                 return EINVAL;
1752                         }
1753                         args->flags |= XFSMNT_IHASHSIZE;
1754                         args->ihashsize = simple_strtoul(value, &eov, 10);
1755                 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1756                            !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1757                         vfsp->vfs_flag |= VFS_GRPID;
1758                 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1759                            !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1760                         vfsp->vfs_flag &= ~VFS_GRPID;
1761                 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1762                         args->flags |= XFSMNT_WSYNC;
1763                 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1764                         args->flags |= XFSMNT_OSYNCISOSYNC;
1765                 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1766                         args->flags |= XFSMNT_NORECOVERY;
1767                 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1768                         args->flags |= XFSMNT_INO64;
1769 #if !XFS_BIG_INUMS
1770                         printk("XFS: %s option not allowed on this system\n",
1771                                 this_char);
1772                         return EINVAL;
1773 #endif
1774                 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1775                         args->flags |= XFSMNT_NOALIGN;
1776                 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1777                         args->flags |= XFSMNT_SWALLOC;
1778                 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1779                         if (!value || !*value) {
1780                                 printk("XFS: %s option requires an argument\n",
1781                                         this_char);
1782                                 return EINVAL;
1783                         }
1784                         dsunit = simple_strtoul(value, &eov, 10);
1785                 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1786                         if (!value || !*value) {
1787                                 printk("XFS: %s option requires an argument\n",
1788                                         this_char);
1789                                 return EINVAL;
1790                         }
1791                         dswidth = simple_strtoul(value, &eov, 10);
1792                 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1793                         args->flags &= ~XFSMNT_32BITINODES;
1794 #if !XFS_BIG_INUMS
1795                         printk("XFS: %s option not allowed on this system\n",
1796                                 this_char);
1797                         return EINVAL;
1798 #endif
1799                 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1800                         args->flags |= XFSMNT_NOUUID;
1801                 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1802                         args->flags |= XFSMNT_BARRIER;
1803                 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1804                         args->flags &= ~XFSMNT_IDELETE;
1805                 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1806                         args->flags |= XFSMNT_IDELETE;
1807                 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1808                         args->flags &= ~XFSMNT_COMPAT_IOSIZE;
1809                 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1810                         args->flags |= XFSMNT_COMPAT_IOSIZE;
1811                 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1812                         args->flags &= ~XFSMNT_COMPAT_ATTR;
1813                 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1814                         args->flags |= XFSMNT_COMPAT_ATTR;
1815                 } else if (!strcmp(this_char, "osyncisdsync")) {
1816                         /* no-op, this is now the default */
1817 printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
1818                 } else if (!strcmp(this_char, "irixsgid")) {
1819 printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1820                 } else {
1821                         printk("XFS: unknown mount option [%s].\n", this_char);
1822                         return EINVAL;
1823                 }
1824         }
1825
1826         if (args->flags & XFSMNT_NORECOVERY) {
1827                 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1828                         printk("XFS: no-recovery mounts must be read-only.\n");
1829                         return EINVAL;
1830                 }
1831         }
1832
1833         if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1834                 printk(
1835         "XFS: sunit and swidth options incompatible with the noalign option\n");
1836                 return EINVAL;
1837         }
1838
1839         if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1840                 printk("XFS: sunit and swidth must be specified together\n");
1841                 return EINVAL;
1842         }
1843
1844         if (dsunit && (dswidth % dsunit != 0)) {
1845                 printk(
1846         "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1847                         dswidth, dsunit);
1848                 return EINVAL;
1849         }
1850
1851         if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1852                 if (dsunit) {
1853                         args->sunit = dsunit;
1854                         args->flags |= XFSMNT_RETERR;
1855                 } else {
1856                         args->sunit = vol_dsunit;
1857                 }
1858                 dswidth ? (args->swidth = dswidth) :
1859                           (args->swidth = vol_dswidth);
1860         } else {
1861                 args->sunit = args->swidth = 0;
1862         }
1863
1864         return 0;
1865 }
1866
1867 STATIC int
1868 xfs_showargs(
1869         struct bhv_desc         *bhv,
1870         struct seq_file         *m)
1871 {
1872         static struct proc_xfs_info {
1873                 int     flag;
1874                 char    *str;
1875         } xfs_info[] = {
1876                 /* the few simple ones we can get from the mount struct */
1877                 { XFS_MOUNT_WSYNC,              "," MNTOPT_WSYNC },
1878                 { XFS_MOUNT_INO64,              "," MNTOPT_INO64 },
1879                 { XFS_MOUNT_NOALIGN,            "," MNTOPT_NOALIGN },
1880                 { XFS_MOUNT_SWALLOC,            "," MNTOPT_SWALLOC },
1881                 { XFS_MOUNT_NOUUID,             "," MNTOPT_NOUUID },
1882                 { XFS_MOUNT_NORECOVERY,         "," MNTOPT_NORECOVERY },
1883                 { XFS_MOUNT_OSYNCISOSYNC,       "," MNTOPT_OSYNCISOSYNC },
1884                 { XFS_MOUNT_BARRIER,            "," MNTOPT_BARRIER },
1885                 { XFS_MOUNT_IDELETE,            "," MNTOPT_NOIKEEP },
1886                 { 0, NULL }
1887         };
1888         struct proc_xfs_info    *xfs_infop;
1889         struct xfs_mount        *mp = XFS_BHVTOM(bhv);
1890         struct vfs              *vfsp = XFS_MTOVFS(mp);
1891
1892         for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1893                 if (mp->m_flags & xfs_infop->flag)
1894                         seq_puts(m, xfs_infop->str);
1895         }
1896
1897         if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1898                 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1899
1900         if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1901                 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%d", 1<<mp->m_writeio_log);
1902
1903         if (mp->m_logbufs > 0)
1904                 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1905
1906         if (mp->m_logbsize > 0)
1907                 seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
1908
1909         if (mp->m_logname)
1910                 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1911
1912         if (mp->m_rtname)
1913                 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1914
1915         if (mp->m_dalign > 0)
1916                 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1917                                 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1918
1919         if (mp->m_swidth > 0)
1920                 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1921                                 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1922
1923         if (!(mp->m_flags & XFS_MOUNT_32BITINOOPT))
1924                 seq_printf(m, "," MNTOPT_64BITINODE);
1925
1926         if (vfsp->vfs_flag & VFS_GRPID)
1927                 seq_printf(m, "," MNTOPT_GRPID);
1928
1929         return 0;
1930 }
1931
1932 STATIC void
1933 xfs_freeze(
1934         bhv_desc_t      *bdp)
1935 {
1936         xfs_mount_t     *mp = XFS_BHVTOM(bdp);
1937
1938         while (atomic_read(&mp->m_active_trans) > 0)
1939                 delay(100);
1940
1941         /* Push the superblock and write an unmount record */
1942         xfs_log_unmount_write(mp);
1943         xfs_unmountfs_writesb(mp);
1944 }
1945
1946
1947 vfsops_t xfs_vfsops = {
1948         BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1949         .vfs_parseargs          = xfs_parseargs,
1950         .vfs_showargs           = xfs_showargs,
1951         .vfs_mount              = xfs_mount,
1952         .vfs_unmount            = xfs_unmount,
1953         .vfs_mntupdate          = xfs_mntupdate,
1954         .vfs_root               = xfs_root,
1955         .vfs_statvfs            = xfs_statvfs,
1956         .vfs_sync               = xfs_sync,
1957         .vfs_vget               = xfs_vget,
1958         .vfs_dmapiops           = (vfs_dmapiops_t)fs_nosys,
1959         .vfs_quotactl           = (vfs_quotactl_t)fs_nosys,
1960         .vfs_init_vnode         = xfs_initialize_vnode,
1961         .vfs_force_shutdown     = xfs_do_force_shutdown,
1962         .vfs_freeze             = xfs_freeze,
1963 };