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