fs/xfs/linux-2.6/xfs_iops.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_bit.h"
  21 #include "xfs_log.h"
  22 #include "xfs_inum.h"
  23 #include "xfs_trans.h"
  24 #include "xfs_sb.h"
  25 #include "xfs_ag.h"
  26 #include "xfs_dir2.h"
  27 #include "xfs_alloc.h"
  28 #include "xfs_dmapi.h"
  29 #include "xfs_quota.h"
  30 #include "xfs_mount.h"
  31 #include "xfs_bmap_btree.h"
  32 #include "xfs_alloc_btree.h"
  33 #include "xfs_ialloc_btree.h"
  34 #include "xfs_dir2_sf.h"
  35 #include "xfs_attr_sf.h"
  36 #include "xfs_dinode.h"
  37 #include "xfs_inode.h"
  38 #include "xfs_bmap.h"
  39 #include "xfs_btree.h"
  40 #include "xfs_ialloc.h"
  41 #include "xfs_rtalloc.h"
  42 #include "xfs_error.h"
  43 #include "xfs_itable.h"
  44 #include "xfs_rw.h"
  45 #include "xfs_acl.h"
  46 #include "xfs_attr.h"
  47 #include "xfs_buf_item.h"
  48 #include "xfs_utils.h"
  49 #include "xfs_vnodeops.h"
  50
  51 #include <linux/capability.h>
  52 #include <linux/xattr.h>
  53 #include <linux/namei.h>
  54 #include <linux/security.h>
  55 #include <linux/falloc.h>
  56
  57 /*
  58  * Bring the atime in the XFS inode uptodate.
  59  * Used before logging the inode to disk or when the Linux inode goes away.
  60  */
  61 void
  62 xfs_synchronize_atime(
  63         xfs_inode_t     *ip)
  64 {
  65         struct inode    *inode = VFS_I(ip);
  66
  67         if (inode) {
  68                 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
  69                 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
  70         }
  71 }
  72
  73 /*
  74  * If the linux inode exists, mark it dirty.
  75  * Used when commiting a dirty inode into a transaction so that
  76  * the inode will get written back by the linux code
  77  */
  78 void
  79 xfs_mark_inode_dirty_sync(
  80         xfs_inode_t     *ip)
  81 {
  82         struct inode    *inode = VFS_I(ip);
  83
  84         if (inode)
  85                 mark_inode_dirty_sync(inode);
  86 }
  87
  88 /*
  89  * Change the requested timestamp in the given inode.
  90  * We don't lock across timestamp updates, and we don't log them but
  91  * we do record the fact that there is dirty information in core.
  92  */
  93 void
  94 xfs_ichgtime(
  95         xfs_inode_t     *ip,
  96         int             flags)
  97 {
  98         struct inode    *inode = VFS_I(ip);
  99         timespec_t      tv;
 100         int             sync_it = 0;
 101
 102         tv = current_fs_time(inode->i_sb);
 103
 104         if ((flags & XFS_ICHGTIME_MOD) &&
 105             !timespec_equal(&inode->i_mtime, &tv)) {
 106                 inode->i_mtime = tv;
 107                 ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
 108                 ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
 109                 sync_it = 1;
 110         }
 111         if ((flags & XFS_ICHGTIME_CHG) &&
 112             !timespec_equal(&inode->i_ctime, &tv)) {
 113                 inode->i_ctime = tv;
 114                 ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
 115                 ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
 116                 sync_it = 1;
 117         }
 118
 119         /*
 120          * We update the i_update_core field _after_ changing
 121          * the timestamps in order to coordinate properly with
 122          * xfs_iflush() so that we don't lose timestamp updates.
 123          * This keeps us from having to hold the inode lock
 124          * while doing this.  We use the SYNCHRONIZE macro to
 125          * ensure that the compiler does not reorder the update
 126          * of i_update_core above the timestamp updates above.
 127          */
 128         if (sync_it) {
 129                 SYNCHRONIZE();
 130                 ip->i_update_core = 1;
 131                 mark_inode_dirty_sync(inode);
 132         }
 133 }
 134
 135 /*
 136  * Hook in SELinux.  This is not quite correct yet, what we really need
 137  * here (as we do for default ACLs) is a mechanism by which creation of
 138  * these attrs can be journalled at inode creation time (along with the
 139  * inode, of course, such that log replay can't cause these to be lost).
 140  */
 141 STATIC int
 142 xfs_init_security(
 143         struct inode    *inode,
 144         struct inode    *dir)
 145 {
 146         struct xfs_inode *ip = XFS_I(inode);
 147         size_t          length;
 148         void            *value;
 149         char            *name;
 150         int             error;
 151
 152         error = security_inode_init_security(inode, dir, &name,
 153                                              &value, &length);
 154         if (error) {
 155                 if (error == -EOPNOTSUPP)
 156                         return 0;
 157                 return -error;
 158         }
 159
 160         error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
 161         if (!error)
 162                 xfs_iflags_set(ip, XFS_IMODIFIED);
 163
 164         kfree(name);
 165         kfree(value);
 166         return error;
 167 }
 168
 169 static void
 170 xfs_dentry_to_name(
 171         struct xfs_name *namep,
 172         struct dentry   *dentry)
 173 {
 174         namep->name = dentry->d_name.name;
 175         namep->len = dentry->d_name.len;
 176 }
 177
 178 STATIC void
 179 xfs_cleanup_inode(
 180         struct inode    *dir,
 181         struct inode    *inode,
 182         struct dentry   *dentry)
 183 {
 184         struct xfs_name teardown;
 185
 186         /* Oh, the horror.
 187          * If we can't add the ACL or we fail in
 188          * xfs_init_security we must back out.
 189          * ENOSPC can hit here, among other things.
 190          */
 191         xfs_dentry_to_name(&teardown, dentry);
 192
 193         xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
 194         iput(inode);
 195 }
 196
 197 STATIC int
 198 xfs_vn_mknod(
 199         struct inode    *dir,
 200         struct dentry   *dentry,
 201         int             mode,
 202         dev_t           rdev)
 203 {
 204         struct inode    *inode;
 205         struct xfs_inode *ip = NULL;
 206         xfs_acl_t       *default_acl = NULL;
 207         struct xfs_name name;
 208         int (*test_default_acl)(struct inode *) = _ACL_DEFAULT_EXISTS;
 209         int             error;
 210
 211         /*
 212          * Irix uses Missed'em'V split, but doesn't want to see
 213          * the upper 5 bits of (14bit) major.
 214          */
 215         if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
 216                 return -EINVAL;
 217
 218         if (test_default_acl && test_default_acl(dir)) {
 219                 if (!_ACL_ALLOC(default_acl)) {
 220                         return -ENOMEM;
 221                 }
 222                 if (!_ACL_GET_DEFAULT(dir, default_acl)) {
 223                         _ACL_FREE(default_acl);
 224                         default_acl = NULL;
 225                 }
 226         }
 227
 228         xfs_dentry_to_name(&name, dentry);
 229
 230         if (IS_POSIXACL(dir) && !default_acl)
 231                 mode &= ~current->fs->umask;
 232
 233         switch (mode & S_IFMT) {
 234         case S_IFCHR:
 235         case S_IFBLK:
 236         case S_IFIFO:
 237         case S_IFSOCK:
 238                 rdev = sysv_encode_dev(rdev);
 239         case S_IFREG:
 240                 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
 241                 break;
 242         case S_IFDIR:
 243                 error = xfs_mkdir(XFS_I(dir), &name, mode, &ip, NULL);
 244                 break;
 245         default:
 246                 error = EINVAL;
 247                 break;
 248         }
 249
 250         if (unlikely(error))
 251                 goto out_free_acl;
 252
 253         inode = VFS_I(ip);
 254
 255         error = xfs_init_security(inode, dir);
 256         if (unlikely(error))
 257                 goto out_cleanup_inode;
 258
 259         if (default_acl) {
 260                 error = _ACL_INHERIT(inode, mode, default_acl);
 261                 if (unlikely(error))
 262                         goto out_cleanup_inode;
 263                 xfs_iflags_set(ip, XFS_IMODIFIED);
 264                 _ACL_FREE(default_acl);
 265         }
 266
 267
 268         d_instantiate(dentry, inode);
 269         return -error;
 270
 271  out_cleanup_inode:
 272         xfs_cleanup_inode(dir, inode, dentry);
 273  out_free_acl:
 274         if (default_acl)
 275                 _ACL_FREE(default_acl);
 276         return -error;
 277 }
 278
 279 STATIC int
 280 xfs_vn_create(
 281         struct inode    *dir,
 282         struct dentry   *dentry,
 283         int             mode,
 284         struct nameidata *nd)
 285 {
 286         return xfs_vn_mknod(dir, dentry, mode, 0);
 287 }
 288
 289 STATIC int
 290 xfs_vn_mkdir(
 291         struct inode    *dir,
 292         struct dentry   *dentry,
 293         int             mode)
 294 {
 295         return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
 296 }
 297
 298 STATIC struct dentry *
 299 xfs_vn_lookup(
 300         struct inode    *dir,
 301         struct dentry   *dentry,
 302         struct nameidata *nd)
 303 {
 304         struct xfs_inode *cip;
 305         struct xfs_name name;
 306         int             error;
 307
 308         if (dentry->d_name.len >= MAXNAMELEN)
 309                 return ERR_PTR(-ENAMETOOLONG);
 310
 311         xfs_dentry_to_name(&name, dentry);
 312         error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
 313         if (unlikely(error)) {
 314                 if (unlikely(error != ENOENT))
 315                         return ERR_PTR(-error);
 316                 d_add(dentry, NULL);
 317                 return NULL;
 318         }
 319
 320         return d_splice_alias(VFS_I(cip), dentry);
 321 }
 322
 323 STATIC struct dentry *
 324 xfs_vn_ci_lookup(
 325         struct inode    *dir,
 326         struct dentry   *dentry,
 327         struct nameidata *nd)
 328 {
 329         struct xfs_inode *ip;
 330         struct xfs_name xname;
 331         struct xfs_name ci_name;
 332         struct qstr     dname;
 333         int             error;
 334
 335         if (dentry->d_name.len >= MAXNAMELEN)
 336                 return ERR_PTR(-ENAMETOOLONG);
 337
 338         xfs_dentry_to_name(&xname, dentry);
 339         error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
 340         if (unlikely(error)) {
 341                 if (unlikely(error != ENOENT))
 342                         return ERR_PTR(-error);
 343                 /*
 344                  * call d_add(dentry, NULL) here when d_drop_negative_children
 345                  * is called in xfs_vn_mknod (ie. allow negative dentries
 346                  * with CI filesystems).
 347                  */
 348                 return NULL;
 349         }
 350
 351         /* if exact match, just splice and exit */
 352         if (!ci_name.name)
 353                 return d_splice_alias(VFS_I(ip), dentry);
 354
 355         /* else case-insensitive match... */
 356         dname.name = ci_name.name;
 357         dname.len = ci_name.len;
 358         dentry = d_add_ci(dentry, VFS_I(ip), &dname);
 359         kmem_free(ci_name.name);
 360         return dentry;
 361 }
 362
 363 STATIC int
 364 xfs_vn_link(
 365         struct dentry   *old_dentry,
 366         struct inode    *dir,
 367         struct dentry   *dentry)
 368 {
 369         struct inode    *inode; /* inode of guy being linked to */
 370         struct xfs_name name;
 371         int             error;
 372
 373         inode = old_dentry->d_inode;
 374         xfs_dentry_to_name(&name, dentry);
 375
 376         igrab(inode);
 377         error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
 378         if (unlikely(error)) {
 379                 iput(inode);
 380                 return -error;
 381         }
 382
 383         xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
 384         d_instantiate(dentry, inode);
 385         return 0;
 386 }
 387
 388 STATIC int
 389 xfs_vn_unlink(
 390         struct inode    *dir,
 391         struct dentry   *dentry)
 392 {
 393         struct xfs_name name;
 394         int             error;
 395
 396         xfs_dentry_to_name(&name, dentry);
 397
 398         error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
 399         if (error)
 400                 return error;
 401
 402         /*
 403          * With unlink, the VFS makes the dentry "negative": no inode,
 404          * but still hashed. This is incompatible with case-insensitive
 405          * mode, so invalidate (unhash) the dentry in CI-mode.
 406          */
 407         if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
 408                 d_invalidate(dentry);
 409         return 0;
 410 }
 411
 412 STATIC int
 413 xfs_vn_symlink(
 414         struct inode    *dir,
 415         struct dentry   *dentry,
 416         const char      *symname)
 417 {
 418         struct inode    *inode;
 419         struct xfs_inode *cip = NULL;
 420         struct xfs_name name;
 421         int             error;
 422         mode_t          mode;
 423
 424         mode = S_IFLNK |
 425                 (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
 426         xfs_dentry_to_name(&name, dentry);
 427
 428         error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL);
 429         if (unlikely(error))
 430                 goto out;
 431
 432         inode = VFS_I(cip);
 433
 434         error = xfs_init_security(inode, dir);
 435         if (unlikely(error))
 436                 goto out_cleanup_inode;
 437
 438         d_instantiate(dentry, inode);
 439         return 0;
 440
 441  out_cleanup_inode:
 442         xfs_cleanup_inode(dir, inode, dentry);
 443  out:
 444         return -error;
 445 }
 446
 447 STATIC int
 448 xfs_vn_rename(
 449         struct inode    *odir,
 450         struct dentry   *odentry,
 451         struct inode    *ndir,
 452         struct dentry   *ndentry)
 453 {
 454         struct inode    *new_inode = ndentry->d_inode;
 455         struct xfs_name oname;
 456         struct xfs_name nname;
 457
 458         xfs_dentry_to_name(&oname, odentry);
 459         xfs_dentry_to_name(&nname, ndentry);
 460
 461         return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
 462                            XFS_I(ndir), &nname, new_inode ?
 463                                                 XFS_I(new_inode) : NULL);
 464 }
 465
 466 /*
 467  * careful here - this function can get called recursively, so
 468  * we need to be very careful about how much stack we use.
 469  * uio is kmalloced for this reason...
 470  */
 471 STATIC void *
 472 xfs_vn_follow_link(
 473         struct dentry           *dentry,
 474         struct nameidata        *nd)
 475 {
 476         char                    *link;
 477         int                     error = -ENOMEM;
 478
 479         link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
 480         if (!link)
 481                 goto out_err;
 482
 483         error = -xfs_readlink(XFS_I(dentry->d_inode), link);
 484         if (unlikely(error))
 485                 goto out_kfree;
 486
 487         nd_set_link(nd, link);
 488         return NULL;
 489
 490  out_kfree:
 491         kfree(link);
 492  out_err:
 493         nd_set_link(nd, ERR_PTR(error));
 494         return NULL;
 495 }
 496
 497 STATIC void
 498 xfs_vn_put_link(
 499         struct dentry   *dentry,
 500         struct nameidata *nd,
 501         void            *p)
 502 {
 503         char            *s = nd_get_link(nd);
 504
 505         if (!IS_ERR(s))
 506                 kfree(s);
 507 }
 508
 509 #ifdef CONFIG_XFS_POSIX_ACL
 510 STATIC int
 511 xfs_check_acl(
 512         struct inode            *inode,
 513         int                     mask)
 514 {
 515         struct xfs_inode        *ip = XFS_I(inode);
 516         int                     error;
 517
 518         xfs_itrace_entry(ip);
 519
 520         if (XFS_IFORK_Q(ip)) {
 521                 error = xfs_acl_iaccess(ip, mask, NULL);
 522                 if (error != -1)
 523                         return -error;
 524         }
 525
 526         return -EAGAIN;
 527 }
 528
 529 STATIC int
 530 xfs_vn_permission(
 531         struct inode            *inode,
 532         int                     mask)
 533 {
 534         return generic_permission(inode, mask, xfs_check_acl);
 535 }
 536 #else
 537 #define xfs_vn_permission NULL
 538 #endif
 539
 540 STATIC int
 541 xfs_vn_getattr(
 542         struct vfsmount         *mnt,
 543         struct dentry           *dentry,
 544         struct kstat            *stat)
 545 {
 546         struct inode            *inode = dentry->d_inode;
 547         struct xfs_inode        *ip = XFS_I(inode);
 548         struct xfs_mount        *mp = ip->i_mount;
 549
 550         xfs_itrace_entry(ip);
 551
 552         if (XFS_FORCED_SHUTDOWN(mp))
 553                 return XFS_ERROR(EIO);
 554
 555         stat->size = XFS_ISIZE(ip);
 556         stat->dev = inode->i_sb->s_dev;
 557         stat->mode = ip->i_d.di_mode;
 558         stat->nlink = ip->i_d.di_nlink;
 559         stat->uid = ip->i_d.di_uid;
 560         stat->gid = ip->i_d.di_gid;
 561         stat->ino = ip->i_ino;
 562 #if XFS_BIG_INUMS
 563         stat->ino += mp->m_inoadd;
 564 #endif
 565         stat->atime = inode->i_atime;
 566         stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec;
 567         stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
 568         stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec;
 569         stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
 570         stat->blocks =
 571                 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
 572
 573
 574         switch (inode->i_mode & S_IFMT) {
 575         case S_IFBLK:
 576         case S_IFCHR:
 577                 stat->blksize = BLKDEV_IOSIZE;
 578                 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
 579                                    sysv_minor(ip->i_df.if_u2.if_rdev));
 580                 break;
 581         default:
 582                 if (XFS_IS_REALTIME_INODE(ip)) {
 583                         /*
 584                          * If the file blocks are being allocated from a
 585                          * realtime volume, then return the inode's realtime
 586                          * extent size or the realtime volume's extent size.
 587                          */
 588                         stat->blksize =
 589                                 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
 590                 } else
 591                         stat->blksize = xfs_preferred_iosize(mp);
 592                 stat->rdev = 0;
 593                 break;
 594         }
 595
 596         return 0;
 597 }
 598
 599 STATIC int
 600 xfs_vn_setattr(
 601         struct dentry   *dentry,
 602         struct iattr    *iattr)
 603 {
 604         return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0, NULL);
 605 }
 606
 607 /*
 608  * block_truncate_page can return an error, but we can't propagate it
 609  * at all here. Leave a complaint + stack trace in the syslog because
 610  * this could be bad. If it is bad, we need to propagate the error further.
 611  */
 612 STATIC void
 613 xfs_vn_truncate(
 614         struct inode    *inode)
 615 {
 616         int     error;
 617         error = block_truncate_page(inode->i_mapping, inode->i_size,
 618                                                         xfs_get_blocks);
 619         WARN_ON(error);
 620 }
 621
 622 STATIC long
 623 xfs_vn_fallocate(
 624         struct inode    *inode,
 625         int             mode,
 626         loff_t          offset,
 627         loff_t          len)
 628 {
 629         long            error;
 630         loff_t          new_size = 0;
 631         xfs_flock64_t   bf;
 632         xfs_inode_t     *ip = XFS_I(inode);
 633
 634         /* preallocation on directories not yet supported */
 635         error = -ENODEV;
 636         if (S_ISDIR(inode->i_mode))
 637                 goto out_error;
 638
 639         bf.l_whence = 0;
 640         bf.l_start = offset;
 641         bf.l_len = len;
 642
 643         xfs_ilock(ip, XFS_IOLOCK_EXCL);
 644         error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
 645                                       0, NULL, XFS_ATTR_NOLOCK);
 646         if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
 647             offset + len > i_size_read(inode))
 648                 new_size = offset + len;
 649
 650         /* Change file size if needed */
 651         if (new_size) {
 652                 struct iattr iattr;
 653
 654                 iattr.ia_valid = ATTR_SIZE;
 655                 iattr.ia_size = new_size;
 656                 error = xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK, NULL);
 657         }
 658
 659         xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 660 out_error:
 661         return error;
 662 }
 663
 664 static const struct inode_operations xfs_inode_operations = {
 665         .permission             = xfs_vn_permission,
 666         .truncate               = xfs_vn_truncate,
 667         .getattr                = xfs_vn_getattr,
 668         .setattr                = xfs_vn_setattr,
 669         .setxattr               = generic_setxattr,
 670         .getxattr               = generic_getxattr,
 671         .removexattr            = generic_removexattr,
 672         .listxattr              = xfs_vn_listxattr,
 673         .fallocate              = xfs_vn_fallocate,
 674 };
 675
 676 static const struct inode_operations xfs_dir_inode_operations = {
 677         .create                 = xfs_vn_create,
 678         .lookup                 = xfs_vn_lookup,
 679         .link                   = xfs_vn_link,
 680         .unlink                 = xfs_vn_unlink,
 681         .symlink                = xfs_vn_symlink,
 682         .mkdir                  = xfs_vn_mkdir,
 683         /*
 684          * Yes, XFS uses the same method for rmdir and unlink.
 685          *
 686          * There are some subtile differences deeper in the code,
 687          * but we use S_ISDIR to check for those.
 688          */
 689         .rmdir                  = xfs_vn_unlink,
 690         .mknod                  = xfs_vn_mknod,
 691         .rename                 = xfs_vn_rename,
 692         .permission             = xfs_vn_permission,
 693         .getattr                = xfs_vn_getattr,
 694         .setattr                = xfs_vn_setattr,
 695         .setxattr               = generic_setxattr,
 696         .getxattr               = generic_getxattr,
 697         .removexattr            = generic_removexattr,
 698         .listxattr              = xfs_vn_listxattr,
 699 };
 700
 701 static const struct inode_operations xfs_dir_ci_inode_operations = {
 702         .create                 = xfs_vn_create,
 703         .lookup                 = xfs_vn_ci_lookup,
 704         .link                   = xfs_vn_link,
 705         .unlink                 = xfs_vn_unlink,
 706         .symlink                = xfs_vn_symlink,
 707         .mkdir                  = xfs_vn_mkdir,
 708         /*
 709          * Yes, XFS uses the same method for rmdir and unlink.
 710          *
 711          * There are some subtile differences deeper in the code,
 712          * but we use S_ISDIR to check for those.
 713          */
 714         .rmdir                  = xfs_vn_unlink,
 715         .mknod                  = xfs_vn_mknod,
 716         .rename                 = xfs_vn_rename,
 717         .permission             = xfs_vn_permission,
 718         .getattr                = xfs_vn_getattr,
 719         .setattr                = xfs_vn_setattr,
 720         .setxattr               = generic_setxattr,
 721         .getxattr               = generic_getxattr,
 722         .removexattr            = generic_removexattr,
 723         .listxattr              = xfs_vn_listxattr,
 724 };
 725
 726 static const struct inode_operations xfs_symlink_inode_operations = {
 727         .readlink               = generic_readlink,
 728         .follow_link            = xfs_vn_follow_link,
 729         .put_link               = xfs_vn_put_link,
 730         .permission             = xfs_vn_permission,
 731         .getattr                = xfs_vn_getattr,
 732         .setattr                = xfs_vn_setattr,
 733         .setxattr               = generic_setxattr,
 734         .getxattr               = generic_getxattr,
 735         .removexattr            = generic_removexattr,
 736         .listxattr              = xfs_vn_listxattr,
 737 };
 738
 739 STATIC void
 740 xfs_diflags_to_iflags(
 741         struct inode            *inode,
 742         struct xfs_inode        *ip)
 743 {
 744         if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
 745                 inode->i_flags |= S_IMMUTABLE;
 746         else
 747                 inode->i_flags &= ~S_IMMUTABLE;
 748         if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
 749                 inode->i_flags |= S_APPEND;
 750         else
 751                 inode->i_flags &= ~S_APPEND;
 752         if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
 753                 inode->i_flags |= S_SYNC;
 754         else
 755                 inode->i_flags &= ~S_SYNC;
 756         if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
 757                 inode->i_flags |= S_NOATIME;
 758         else
 759                 inode->i_flags &= ~S_NOATIME;
 760 }
 761
 762 /*
 763  * Initialize the Linux inode, set up the operation vectors and
 764  * unlock the inode.
 765  *
 766  * When reading existing inodes from disk this is called directly
 767  * from xfs_iget, when creating a new inode it is called from
 768  * xfs_ialloc after setting up the inode.
 769  */
 770 void
 771 xfs_setup_inode(
 772         struct xfs_inode        *ip)
 773 {
 774         struct inode            *inode = ip->i_vnode;
 775
 776         inode->i_mode   = ip->i_d.di_mode;
 777         inode->i_nlink  = ip->i_d.di_nlink;
 778         inode->i_uid    = ip->i_d.di_uid;
 779         inode->i_gid    = ip->i_d.di_gid;
 780
 781         switch (inode->i_mode & S_IFMT) {
 782         case S_IFBLK:
 783         case S_IFCHR:
 784                 inode->i_rdev =
 785                         MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
 786                               sysv_minor(ip->i_df.if_u2.if_rdev));
 787                 break;
 788         default:
 789                 inode->i_rdev = 0;
 790                 break;
 791         }
 792
 793         inode->i_generation = ip->i_d.di_gen;
 794         i_size_write(inode, ip->i_d.di_size);
 795         inode->i_atime.tv_sec   = ip->i_d.di_atime.t_sec;
 796         inode->i_atime.tv_nsec  = ip->i_d.di_atime.t_nsec;
 797         inode->i_mtime.tv_sec   = ip->i_d.di_mtime.t_sec;
 798         inode->i_mtime.tv_nsec  = ip->i_d.di_mtime.t_nsec;
 799         inode->i_ctime.tv_sec   = ip->i_d.di_ctime.t_sec;
 800         inode->i_ctime.tv_nsec  = ip->i_d.di_ctime.t_nsec;
 801         xfs_diflags_to_iflags(inode, ip);
 802         xfs_iflags_clear(ip, XFS_IMODIFIED);
 803
 804         switch (inode->i_mode & S_IFMT) {
 805         case S_IFREG:
 806                 inode->i_op = &xfs_inode_operations;
 807                 inode->i_fop = &xfs_file_operations;
 808                 inode->i_mapping->a_ops = &xfs_address_space_operations;
 809                 break;
 810         case S_IFDIR:
 811                 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
 812                         inode->i_op = &xfs_dir_ci_inode_operations;
 813                 else
 814                         inode->i_op = &xfs_dir_inode_operations;
 815                 inode->i_fop = &xfs_dir_file_operations;
 816                 break;
 817         case S_IFLNK:
 818                 inode->i_op = &xfs_symlink_inode_operations;
 819                 if (!(ip->i_df.if_flags & XFS_IFINLINE))
 820                         inode->i_mapping->a_ops = &xfs_address_space_operations;
 821                 break;
 822         default:
 823                 inode->i_op = &xfs_inode_operations;
 824                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 825                 break;
 826         }
 827
 828         xfs_iflags_clear(ip, XFS_INEW);
 829         barrier();
 830
 831         unlock_new_inode(inode);
 832 }