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_acl.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_alloc.h"
  28 #include "xfs_quota.h"
  29 #include "xfs_mount.h"
  30 #include "xfs_bmap_btree.h"
  31 #include "xfs_dinode.h"
  32 #include "xfs_inode.h"
  33 #include "xfs_bmap.h"
  34 #include "xfs_rtalloc.h"
  35 #include "xfs_error.h"
  36 #include "xfs_itable.h"
  37 #include "xfs_rw.h"
  38 #include "xfs_attr.h"
  39 #include "xfs_buf_item.h"
  40 #include "xfs_utils.h"
  41 #include "xfs_vnodeops.h"
  42 #include "xfs_trace.h"
  43
  44 #include <linux/capability.h>
  45 #include <linux/xattr.h>
  46 #include <linux/namei.h>
  47 #include <linux/posix_acl.h>
  48 #include <linux/security.h>
  49 #include <linux/falloc.h>
  50 #include <linux/fiemap.h>
  51 #include <linux/slab.h>
  52
  53 /*
  54  * Bring the timestamps in the XFS inode uptodate.
  55  *
  56  * Used before writing the inode to disk.
  57  */
  58 void
  59 xfs_synchronize_times(
  60         xfs_inode_t     *ip)
  61 {
  62         struct inode    *inode = VFS_I(ip);
  63
  64         ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
  65         ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
  66         ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
  67         ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
  68         ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
  69         ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
  70 }
  71
  72 /*
  73  * If the linux inode is valid, mark it dirty.
  74  * Used when commiting a dirty inode into a transaction so that
  75  * the inode will get written back by the linux code
  76  */
  77 void
  78 xfs_mark_inode_dirty_sync(
  79         xfs_inode_t     *ip)
  80 {
  81         struct inode    *inode = VFS_I(ip);
  82
  83         if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
  84                 mark_inode_dirty_sync(inode);
  85 }
  86
  87 void
  88 xfs_mark_inode_dirty(
  89         xfs_inode_t     *ip)
  90 {
  91         struct inode    *inode = VFS_I(ip);
  92
  93         if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
  94                 mark_inode_dirty(inode);
  95 }
  96
  97 /*
  98  * Hook in SELinux.  This is not quite correct yet, what we really need
  99  * here (as we do for default ACLs) is a mechanism by which creation of
 100  * these attrs can be journalled at inode creation time (along with the
 101  * inode, of course, such that log replay can't cause these to be lost).
 102  */
 103 STATIC int
 104 xfs_init_security(
 105         struct inode    *inode,
 106         struct inode    *dir,
 107         const struct qstr *qstr)
 108 {
 109         struct xfs_inode *ip = XFS_I(inode);
 110         size_t          length;
 111         void            *value;
 112         unsigned char   *name;
 113         int             error;
 114
 115         error = security_inode_init_security(inode, dir, qstr, (char **)&name,
 116                                              &value, &length);
 117         if (error) {
 118                 if (error == -EOPNOTSUPP)
 119                         return 0;
 120                 return -error;
 121         }
 122
 123         error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
 124
 125         kfree(name);
 126         kfree(value);
 127         return error;
 128 }
 129
 130 static void
 131 xfs_dentry_to_name(
 132         struct xfs_name *namep,
 133         struct dentry   *dentry)
 134 {
 135         namep->name = dentry->d_name.name;
 136         namep->len = dentry->d_name.len;
 137 }
 138
 139 STATIC void
 140 xfs_cleanup_inode(
 141         struct inode    *dir,
 142         struct inode    *inode,
 143         struct dentry   *dentry)
 144 {
 145         struct xfs_name teardown;
 146
 147         /* Oh, the horror.
 148          * If we can't add the ACL or we fail in
 149          * xfs_init_security we must back out.
 150          * ENOSPC can hit here, among other things.
 151          */
 152         xfs_dentry_to_name(&teardown, dentry);
 153
 154         xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
 155         iput(inode);
 156 }
 157
 158 STATIC int
 159 xfs_vn_mknod(
 160         struct inode    *dir,
 161         struct dentry   *dentry,
 162         int             mode,
 163         dev_t           rdev)
 164 {
 165         struct inode    *inode;
 166         struct xfs_inode *ip = NULL;
 167         struct posix_acl *default_acl = NULL;
 168         struct xfs_name name;
 169         int             error;
 170
 171         /*
 172          * Irix uses Missed'em'V split, but doesn't want to see
 173          * the upper 5 bits of (14bit) major.
 174          */
 175         if (S_ISCHR(mode) || S_ISBLK(mode)) {
 176                 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
 177                         return -EINVAL;
 178                 rdev = sysv_encode_dev(rdev);
 179         } else {
 180                 rdev = 0;
 181         }
 182
 183         if (IS_POSIXACL(dir)) {
 184                 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
 185                 if (IS_ERR(default_acl))
 186                         return -PTR_ERR(default_acl);
 187
 188                 if (!default_acl)
 189                         mode &= ~current_umask();
 190         }
 191
 192         xfs_dentry_to_name(&name, dentry);
 193         error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
 194         if (unlikely(error))
 195                 goto out_free_acl;
 196
 197         inode = VFS_I(ip);
 198
 199         error = xfs_init_security(inode, dir, &dentry->d_name);
 200         if (unlikely(error))
 201                 goto out_cleanup_inode;
 202
 203         if (default_acl) {
 204                 error = -xfs_inherit_acl(inode, default_acl);
 205                 if (unlikely(error))
 206                         goto out_cleanup_inode;
 207                 posix_acl_release(default_acl);
 208         }
 209
 210
 211         d_instantiate(dentry, inode);
 212         return -error;
 213
 214  out_cleanup_inode:
 215         xfs_cleanup_inode(dir, inode, dentry);
 216  out_free_acl:
 217         posix_acl_release(default_acl);
 218         return -error;
 219 }
 220
 221 STATIC int
 222 xfs_vn_create(
 223         struct inode    *dir,
 224         struct dentry   *dentry,
 225         int             mode,
 226         struct nameidata *nd)
 227 {
 228         return xfs_vn_mknod(dir, dentry, mode, 0);
 229 }
 230
 231 STATIC int
 232 xfs_vn_mkdir(
 233         struct inode    *dir,
 234         struct dentry   *dentry,
 235         int             mode)
 236 {
 237         return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
 238 }
 239
 240 STATIC struct dentry *
 241 xfs_vn_lookup(
 242         struct inode    *dir,
 243         struct dentry   *dentry,
 244         struct nameidata *nd)
 245 {
 246         struct xfs_inode *cip;
 247         struct xfs_name name;
 248         int             error;
 249
 250         if (dentry->d_name.len >= MAXNAMELEN)
 251                 return ERR_PTR(-ENAMETOOLONG);
 252
 253         xfs_dentry_to_name(&name, dentry);
 254         error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
 255         if (unlikely(error)) {
 256                 if (unlikely(error != ENOENT))
 257                         return ERR_PTR(-error);
 258                 d_add(dentry, NULL);
 259                 return NULL;
 260         }
 261
 262         return d_splice_alias(VFS_I(cip), dentry);
 263 }
 264
 265 STATIC struct dentry *
 266 xfs_vn_ci_lookup(
 267         struct inode    *dir,
 268         struct dentry   *dentry,
 269         struct nameidata *nd)
 270 {
 271         struct xfs_inode *ip;
 272         struct xfs_name xname;
 273         struct xfs_name ci_name;
 274         struct qstr     dname;
 275         int             error;
 276
 277         if (dentry->d_name.len >= MAXNAMELEN)
 278                 return ERR_PTR(-ENAMETOOLONG);
 279
 280         xfs_dentry_to_name(&xname, dentry);
 281         error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
 282         if (unlikely(error)) {
 283                 if (unlikely(error != ENOENT))
 284                         return ERR_PTR(-error);
 285                 /*
 286                  * call d_add(dentry, NULL) here when d_drop_negative_children
 287                  * is called in xfs_vn_mknod (ie. allow negative dentries
 288                  * with CI filesystems).
 289                  */
 290                 return NULL;
 291         }
 292
 293         /* if exact match, just splice and exit */
 294         if (!ci_name.name)
 295                 return d_splice_alias(VFS_I(ip), dentry);
 296
 297         /* else case-insensitive match... */
 298         dname.name = ci_name.name;
 299         dname.len = ci_name.len;
 300         dentry = d_add_ci(dentry, VFS_I(ip), &dname);
 301         kmem_free(ci_name.name);
 302         return dentry;
 303 }
 304
 305 STATIC int
 306 xfs_vn_link(
 307         struct dentry   *old_dentry,
 308         struct inode    *dir,
 309         struct dentry   *dentry)
 310 {
 311         struct inode    *inode = old_dentry->d_inode;
 312         struct xfs_name name;
 313         int             error;
 314
 315         xfs_dentry_to_name(&name, dentry);
 316
 317         error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
 318         if (unlikely(error))
 319                 return -error;
 320
 321         ihold(inode);
 322         d_instantiate(dentry, inode);
 323         return 0;
 324 }
 325
 326 STATIC int
 327 xfs_vn_unlink(
 328         struct inode    *dir,
 329         struct dentry   *dentry)
 330 {
 331         struct xfs_name name;
 332         int             error;
 333
 334         xfs_dentry_to_name(&name, dentry);
 335
 336         error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
 337         if (error)
 338                 return error;
 339
 340         /*
 341          * With unlink, the VFS makes the dentry "negative": no inode,
 342          * but still hashed. This is incompatible with case-insensitive
 343          * mode, so invalidate (unhash) the dentry in CI-mode.
 344          */
 345         if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
 346                 d_invalidate(dentry);
 347         return 0;
 348 }
 349
 350 STATIC int
 351 xfs_vn_symlink(
 352         struct inode    *dir,
 353         struct dentry   *dentry,
 354         const char      *symname)
 355 {
 356         struct inode    *inode;
 357         struct xfs_inode *cip = NULL;
 358         struct xfs_name name;
 359         int             error;
 360         mode_t          mode;
 361
 362         mode = S_IFLNK |
 363                 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
 364         xfs_dentry_to_name(&name, dentry);
 365
 366         error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
 367         if (unlikely(error))
 368                 goto out;
 369
 370         inode = VFS_I(cip);
 371
 372         error = xfs_init_security(inode, dir, &dentry->d_name);
 373         if (unlikely(error))
 374                 goto out_cleanup_inode;
 375
 376         d_instantiate(dentry, inode);
 377         return 0;
 378
 379  out_cleanup_inode:
 380         xfs_cleanup_inode(dir, inode, dentry);
 381  out:
 382         return -error;
 383 }
 384
 385 STATIC int
 386 xfs_vn_rename(
 387         struct inode    *odir,
 388         struct dentry   *odentry,
 389         struct inode    *ndir,
 390         struct dentry   *ndentry)
 391 {
 392         struct inode    *new_inode = ndentry->d_inode;
 393         struct xfs_name oname;
 394         struct xfs_name nname;
 395
 396         xfs_dentry_to_name(&oname, odentry);
 397         xfs_dentry_to_name(&nname, ndentry);
 398
 399         return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
 400                            XFS_I(ndir), &nname, new_inode ?
 401                                                 XFS_I(new_inode) : NULL);
 402 }
 403
 404 /*
 405  * careful here - this function can get called recursively, so
 406  * we need to be very careful about how much stack we use.
 407  * uio is kmalloced for this reason...
 408  */
 409 STATIC void *
 410 xfs_vn_follow_link(
 411         struct dentry           *dentry,
 412         struct nameidata        *nd)
 413 {
 414         char                    *link;
 415         int                     error = -ENOMEM;
 416
 417         link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
 418         if (!link)
 419                 goto out_err;
 420
 421         error = -xfs_readlink(XFS_I(dentry->d_inode), link);
 422         if (unlikely(error))
 423                 goto out_kfree;
 424
 425         nd_set_link(nd, link);
 426         return NULL;
 427
 428  out_kfree:
 429         kfree(link);
 430  out_err:
 431         nd_set_link(nd, ERR_PTR(error));
 432         return NULL;
 433 }
 434
 435 STATIC void
 436 xfs_vn_put_link(
 437         struct dentry   *dentry,
 438         struct nameidata *nd,
 439         void            *p)
 440 {
 441         char            *s = nd_get_link(nd);
 442
 443         if (!IS_ERR(s))
 444                 kfree(s);
 445 }
 446
 447 STATIC int
 448 xfs_vn_getattr(
 449         struct vfsmount         *mnt,
 450         struct dentry           *dentry,
 451         struct kstat            *stat)
 452 {
 453         struct inode            *inode = dentry->d_inode;
 454         struct xfs_inode        *ip = XFS_I(inode);
 455         struct xfs_mount        *mp = ip->i_mount;
 456
 457         trace_xfs_getattr(ip);
 458
 459         if (XFS_FORCED_SHUTDOWN(mp))
 460                 return XFS_ERROR(EIO);
 461
 462         stat->size = XFS_ISIZE(ip);
 463         stat->dev = inode->i_sb->s_dev;
 464         stat->mode = ip->i_d.di_mode;
 465         stat->nlink = ip->i_d.di_nlink;
 466         stat->uid = ip->i_d.di_uid;
 467         stat->gid = ip->i_d.di_gid;
 468         stat->ino = ip->i_ino;
 469         stat->atime = inode->i_atime;
 470         stat->mtime = inode->i_mtime;
 471         stat->ctime = inode->i_ctime;
 472         stat->blocks =
 473                 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
 474
 475
 476         switch (inode->i_mode & S_IFMT) {
 477         case S_IFBLK:
 478         case S_IFCHR:
 479                 stat->blksize = BLKDEV_IOSIZE;
 480                 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
 481                                    sysv_minor(ip->i_df.if_u2.if_rdev));
 482                 break;
 483         default:
 484                 if (XFS_IS_REALTIME_INODE(ip)) {
 485                         /*
 486                          * If the file blocks are being allocated from a
 487                          * realtime volume, then return the inode's realtime
 488                          * extent size or the realtime volume's extent size.
 489                          */
 490                         stat->blksize =
 491                                 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
 492                 } else
 493                         stat->blksize = xfs_preferred_iosize(mp);
 494                 stat->rdev = 0;
 495                 break;
 496         }
 497
 498         return 0;
 499 }
 500
 501 STATIC int
 502 xfs_vn_setattr(
 503         struct dentry   *dentry,
 504         struct iattr    *iattr)
 505 {
 506         return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0);
 507 }
 508
 509 STATIC long
 510 xfs_vn_fallocate(
 511         struct inode    *inode,
 512         int             mode,
 513         loff_t          offset,
 514         loff_t          len)
 515 {
 516         long            error;
 517         loff_t          new_size = 0;
 518         xfs_flock64_t   bf;
 519         xfs_inode_t     *ip = XFS_I(inode);
 520
 521         /* preallocation on directories not yet supported */
 522         error = -ENODEV;
 523         if (S_ISDIR(inode->i_mode))
 524                 goto out_error;
 525
 526         bf.l_whence = 0;
 527         bf.l_start = offset;
 528         bf.l_len = len;
 529
 530         xfs_ilock(ip, XFS_IOLOCK_EXCL);
 531
 532         /* check the new inode size is valid before allocating */
 533         if (!(mode & FALLOC_FL_KEEP_SIZE) &&
 534             offset + len > i_size_read(inode)) {
 535                 new_size = offset + len;
 536                 error = inode_newsize_ok(inode, new_size);
 537                 if (error)
 538                         goto out_unlock;
 539         }
 540
 541         error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
 542                                        0, XFS_ATTR_NOLOCK);
 543         if (error)
 544                 goto out_unlock;
 545
 546         /* Change file size if needed */
 547         if (new_size) {
 548                 struct iattr iattr;
 549
 550                 iattr.ia_valid = ATTR_SIZE;
 551                 iattr.ia_size = new_size;
 552                 error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK);
 553         }
 554
 555 out_unlock:
 556         xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 557 out_error:
 558         return error;
 559 }
 560
 561 #define XFS_FIEMAP_FLAGS        (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
 562
 563 /*
 564  * Call fiemap helper to fill in user data.
 565  * Returns positive errors to xfs_getbmap.
 566  */
 567 STATIC int
 568 xfs_fiemap_format(
 569         void                    **arg,
 570         struct getbmapx         *bmv,
 571         int                     *full)
 572 {
 573         int                     error;
 574         struct fiemap_extent_info *fieinfo = *arg;
 575         u32                     fiemap_flags = 0;
 576         u64                     logical, physical, length;
 577
 578         /* Do nothing for a hole */
 579         if (bmv->bmv_block == -1LL)
 580                 return 0;
 581
 582         logical = BBTOB(bmv->bmv_offset);
 583         physical = BBTOB(bmv->bmv_block);
 584         length = BBTOB(bmv->bmv_length);
 585
 586         if (bmv->bmv_oflags & BMV_OF_PREALLOC)
 587                 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
 588         else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
 589                 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
 590                 physical = 0;   /* no block yet */
 591         }
 592         if (bmv->bmv_oflags & BMV_OF_LAST)
 593                 fiemap_flags |= FIEMAP_EXTENT_LAST;
 594
 595         error = fiemap_fill_next_extent(fieinfo, logical, physical,
 596                                         length, fiemap_flags);
 597         if (error > 0) {
 598                 error = 0;
 599                 *full = 1;      /* user array now full */
 600         }
 601
 602         return -error;
 603 }
 604
 605 STATIC int
 606 xfs_vn_fiemap(
 607         struct inode            *inode,
 608         struct fiemap_extent_info *fieinfo,
 609         u64                     start,
 610         u64                     length)
 611 {
 612         xfs_inode_t             *ip = XFS_I(inode);
 613         struct getbmapx         bm;
 614         int                     error;
 615
 616         error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
 617         if (error)
 618                 return error;
 619
 620         /* Set up bmap header for xfs internal routine */
 621         bm.bmv_offset = BTOBB(start);
 622         /* Special case for whole file */
 623         if (length == FIEMAP_MAX_OFFSET)
 624                 bm.bmv_length = -1LL;
 625         else
 626                 bm.bmv_length = BTOBB(length);
 627
 628         /* We add one because in getbmap world count includes the header */
 629         bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
 630                                         fieinfo->fi_extents_max + 1;
 631         bm.bmv_count = min_t(__s32, bm.bmv_count,
 632                              (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
 633         bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
 634         if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
 635                 bm.bmv_iflags |= BMV_IF_ATTRFORK;
 636         if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
 637                 bm.bmv_iflags |= BMV_IF_DELALLOC;
 638
 639         error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
 640         if (error)
 641                 return -error;
 642
 643         return 0;
 644 }
 645
 646 static const struct inode_operations xfs_inode_operations = {
 647         .check_acl              = xfs_check_acl,
 648         .getattr                = xfs_vn_getattr,
 649         .setattr                = xfs_vn_setattr,
 650         .setxattr               = generic_setxattr,
 651         .getxattr               = generic_getxattr,
 652         .removexattr            = generic_removexattr,
 653         .listxattr              = xfs_vn_listxattr,
 654         .fallocate              = xfs_vn_fallocate,
 655         .fiemap                 = xfs_vn_fiemap,
 656 };
 657
 658 static const struct inode_operations xfs_dir_inode_operations = {
 659         .create                 = xfs_vn_create,
 660         .lookup                 = xfs_vn_lookup,
 661         .link                   = xfs_vn_link,
 662         .unlink                 = xfs_vn_unlink,
 663         .symlink                = xfs_vn_symlink,
 664         .mkdir                  = xfs_vn_mkdir,
 665         /*
 666          * Yes, XFS uses the same method for rmdir and unlink.
 667          *
 668          * There are some subtile differences deeper in the code,
 669          * but we use S_ISDIR to check for those.
 670          */
 671         .rmdir                  = xfs_vn_unlink,
 672         .mknod                  = xfs_vn_mknod,
 673         .rename                 = xfs_vn_rename,
 674         .check_acl              = xfs_check_acl,
 675         .getattr                = xfs_vn_getattr,
 676         .setattr                = xfs_vn_setattr,
 677         .setxattr               = generic_setxattr,
 678         .getxattr               = generic_getxattr,
 679         .removexattr            = generic_removexattr,
 680         .listxattr              = xfs_vn_listxattr,
 681 };
 682
 683 static const struct inode_operations xfs_dir_ci_inode_operations = {
 684         .create                 = xfs_vn_create,
 685         .lookup                 = xfs_vn_ci_lookup,
 686         .link                   = xfs_vn_link,
 687         .unlink                 = xfs_vn_unlink,
 688         .symlink                = xfs_vn_symlink,
 689         .mkdir                  = xfs_vn_mkdir,
 690         /*
 691          * Yes, XFS uses the same method for rmdir and unlink.
 692          *
 693          * There are some subtile differences deeper in the code,
 694          * but we use S_ISDIR to check for those.
 695          */
 696         .rmdir                  = xfs_vn_unlink,
 697         .mknod                  = xfs_vn_mknod,
 698         .rename                 = xfs_vn_rename,
 699         .check_acl              = xfs_check_acl,
 700         .getattr                = xfs_vn_getattr,
 701         .setattr                = xfs_vn_setattr,
 702         .setxattr               = generic_setxattr,
 703         .getxattr               = generic_getxattr,
 704         .removexattr            = generic_removexattr,
 705         .listxattr              = xfs_vn_listxattr,
 706 };
 707
 708 static const struct inode_operations xfs_symlink_inode_operations = {
 709         .readlink               = generic_readlink,
 710         .follow_link            = xfs_vn_follow_link,
 711         .put_link               = xfs_vn_put_link,
 712         .check_acl              = xfs_check_acl,
 713         .getattr                = xfs_vn_getattr,
 714         .setattr                = xfs_vn_setattr,
 715         .setxattr               = generic_setxattr,
 716         .getxattr               = generic_getxattr,
 717         .removexattr            = generic_removexattr,
 718         .listxattr              = xfs_vn_listxattr,
 719 };
 720
 721 STATIC void
 722 xfs_diflags_to_iflags(
 723         struct inode            *inode,
 724         struct xfs_inode        *ip)
 725 {
 726         if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
 727                 inode->i_flags |= S_IMMUTABLE;
 728         else
 729                 inode->i_flags &= ~S_IMMUTABLE;
 730         if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
 731                 inode->i_flags |= S_APPEND;
 732         else
 733                 inode->i_flags &= ~S_APPEND;
 734         if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
 735                 inode->i_flags |= S_SYNC;
 736         else
 737                 inode->i_flags &= ~S_SYNC;
 738         if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
 739                 inode->i_flags |= S_NOATIME;
 740         else
 741                 inode->i_flags &= ~S_NOATIME;
 742 }
 743
 744 /*
 745  * Initialize the Linux inode, set up the operation vectors and
 746  * unlock the inode.
 747  *
 748  * When reading existing inodes from disk this is called directly
 749  * from xfs_iget, when creating a new inode it is called from
 750  * xfs_ialloc after setting up the inode.
 751  *
 752  * We are always called with an uninitialised linux inode here.
 753  * We need to initialise the necessary fields and take a reference
 754  * on it.
 755  */
 756 void
 757 xfs_setup_inode(
 758         struct xfs_inode        *ip)
 759 {
 760         struct inode            *inode = &ip->i_vnode;
 761
 762         inode->i_ino = ip->i_ino;
 763         inode->i_state = I_NEW;
 764
 765         inode_sb_list_add(inode);
 766         /* make the inode look hashed for the writeback code */
 767         hlist_add_fake(&inode->i_hash);
 768
 769         inode->i_mode   = ip->i_d.di_mode;
 770         inode->i_nlink  = ip->i_d.di_nlink;
 771         inode->i_uid    = ip->i_d.di_uid;
 772         inode->i_gid    = ip->i_d.di_gid;
 773
 774         switch (inode->i_mode & S_IFMT) {
 775         case S_IFBLK:
 776         case S_IFCHR:
 777                 inode->i_rdev =
 778                         MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
 779                               sysv_minor(ip->i_df.if_u2.if_rdev));
 780                 break;
 781         default:
 782                 inode->i_rdev = 0;
 783                 break;
 784         }
 785
 786         inode->i_generation = ip->i_d.di_gen;
 787         i_size_write(inode, ip->i_d.di_size);
 788         inode->i_atime.tv_sec   = ip->i_d.di_atime.t_sec;
 789         inode->i_atime.tv_nsec  = ip->i_d.di_atime.t_nsec;
 790         inode->i_mtime.tv_sec   = ip->i_d.di_mtime.t_sec;
 791         inode->i_mtime.tv_nsec  = ip->i_d.di_mtime.t_nsec;
 792         inode->i_ctime.tv_sec   = ip->i_d.di_ctime.t_sec;
 793         inode->i_ctime.tv_nsec  = ip->i_d.di_ctime.t_nsec;
 794         xfs_diflags_to_iflags(inode, ip);
 795
 796         switch (inode->i_mode & S_IFMT) {
 797         case S_IFREG:
 798                 inode->i_op = &xfs_inode_operations;
 799                 inode->i_fop = &xfs_file_operations;
 800                 inode->i_mapping->a_ops = &xfs_address_space_operations;
 801                 break;
 802         case S_IFDIR:
 803                 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
 804                         inode->i_op = &xfs_dir_ci_inode_operations;
 805                 else
 806                         inode->i_op = &xfs_dir_inode_operations;
 807                 inode->i_fop = &xfs_dir_file_operations;
 808                 break;
 809         case S_IFLNK:
 810                 inode->i_op = &xfs_symlink_inode_operations;
 811                 if (!(ip->i_df.if_flags & XFS_IFINLINE))
 812                         inode->i_mapping->a_ops = &xfs_address_space_operations;
 813                 break;
 814         default:
 815                 inode->i_op = &xfs_inode_operations;
 816                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 817                 break;
 818         }
 819
 820         xfs_iflags_clear(ip, XFS_INEW);
 821         barrier();
 822
 823         unlock_new_inode(inode);
 824 }