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_dir2.h"
  28 #include "xfs_alloc.h"
  29 #include "xfs_dmapi.h"
  30 #include "xfs_quota.h"
  31 #include "xfs_mount.h"
  32 #include "xfs_bmap_btree.h"
  33 #include "xfs_alloc_btree.h"
  34 #include "xfs_ialloc_btree.h"
  35 #include "xfs_dir2_sf.h"
  36 #include "xfs_attr_sf.h"
  37 #include "xfs_dinode.h"
  38 #include "xfs_inode.h"
  39 #include "xfs_bmap.h"
  40 #include "xfs_btree.h"
  41 #include "xfs_ialloc.h"
  42 #include "xfs_rtalloc.h"
  43 #include "xfs_error.h"
  44 #include "xfs_itable.h"
  45 #include "xfs_rw.h"
  46 #include "xfs_attr.h"
  47 #include "xfs_buf_item.h"
  48 #include "xfs_utils.h"
  49 #include "xfs_vnodeops.h"
  50 #include "xfs_trace.h"
  51
  52 #include <linux/capability.h>
  53 #include <linux/xattr.h>
  54 #include <linux/namei.h>
  55 #include <linux/posix_acl.h>
  56 #include <linux/security.h>
  57 #include <linux/falloc.h>
  58 #include <linux/fiemap.h>
  59
  60 /*
  61  * Bring the timestamps in the XFS inode uptodate.
  62  *
  63  * Used before writing the inode to disk.
  64  */
  65 void
  66 xfs_synchronize_times(
  67         xfs_inode_t     *ip)
  68 {
  69         struct inode    *inode = VFS_I(ip);
  70
  71         ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
  72         ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
  73         ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
  74         ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
  75         ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
  76         ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
  77 }
  78
  79 /*
  80  * If the linux inode is valid, mark it dirty.
  81  * Used when commiting a dirty inode into a transaction so that
  82  * the inode will get written back by the linux code
  83  */
  84 void
  85 xfs_mark_inode_dirty_sync(
  86         xfs_inode_t     *ip)
  87 {
  88         struct inode    *inode = VFS_I(ip);
  89
  90         if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
  91                 mark_inode_dirty_sync(inode);
  92 }
  93
  94 void
  95 xfs_mark_inode_dirty(
  96         xfs_inode_t     *ip)
  97 {
  98         struct inode    *inode = VFS_I(ip);
  99
 100         if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
 101                 mark_inode_dirty(inode);
 102 }
 103
 104 /*
 105  * Change the requested timestamp in the given inode.
 106  * We don't lock across timestamp updates, and we don't log them but
 107  * we do record the fact that there is dirty information in core.
 108  */
 109 void
 110 xfs_ichgtime(
 111         xfs_inode_t     *ip,
 112         int             flags)
 113 {
 114         struct inode    *inode = VFS_I(ip);
 115         timespec_t      tv;
 116         int             sync_it = 0;
 117
 118         tv = current_fs_time(inode->i_sb);
 119
 120         if ((flags & XFS_ICHGTIME_MOD) &&
 121             !timespec_equal(&inode->i_mtime, &tv)) {
 122                 inode->i_mtime = tv;
 123                 sync_it = 1;
 124         }
 125         if ((flags & XFS_ICHGTIME_CHG) &&
 126             !timespec_equal(&inode->i_ctime, &tv)) {
 127                 inode->i_ctime = tv;
 128                 sync_it = 1;
 129         }
 130
 131         /*
 132          * Update complete - now make sure everyone knows that the inode
 133          * is dirty.
 134          */
 135         if (sync_it)
 136                 xfs_mark_inode_dirty_sync(ip);
 137 }
 138
 139 /*
 140  * Hook in SELinux.  This is not quite correct yet, what we really need
 141  * here (as we do for default ACLs) is a mechanism by which creation of
 142  * these attrs can be journalled at inode creation time (along with the
 143  * inode, of course, such that log replay can't cause these to be lost).
 144  */
 145 STATIC int
 146 xfs_init_security(
 147         struct inode    *inode,
 148         struct inode    *dir)
 149 {
 150         struct xfs_inode *ip = XFS_I(inode);
 151         size_t          length;
 152         void            *value;
 153         unsigned char   *name;
 154         int             error;
 155
 156         error = security_inode_init_security(inode, dir, (char **)&name,
 157                                              &value, &length);
 158         if (error) {
 159                 if (error == -EOPNOTSUPP)
 160                         return 0;
 161                 return -error;
 162         }
 163
 164         error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
 165
 166         kfree(name);
 167         kfree(value);
 168         return error;
 169 }
 170
 171 static void
 172 xfs_dentry_to_name(
 173         struct xfs_name *namep,
 174         struct dentry   *dentry)
 175 {
 176         namep->name = dentry->d_name.name;
 177         namep->len = dentry->d_name.len;
 178 }
 179
 180 STATIC void
 181 xfs_cleanup_inode(
 182         struct inode    *dir,
 183         struct inode    *inode,
 184         struct dentry   *dentry)
 185 {
 186         struct xfs_name teardown;
 187
 188         /* Oh, the horror.
 189          * If we can't add the ACL or we fail in
 190          * xfs_init_security we must back out.
 191          * ENOSPC can hit here, among other things.
 192          */
 193         xfs_dentry_to_name(&teardown, dentry);
 194
 195         xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
 196         iput(inode);
 197 }
 198
 199 STATIC int
 200 xfs_vn_mknod(
 201         struct inode    *dir,
 202         struct dentry   *dentry,
 203         int             mode,
 204         dev_t           rdev)
 205 {
 206         struct inode    *inode;
 207         struct xfs_inode *ip = NULL;
 208         struct posix_acl *default_acl = NULL;
 209         struct xfs_name name;
 210         int             error;
 211
 212         /*
 213          * Irix uses Missed'em'V split, but doesn't want to see
 214          * the upper 5 bits of (14bit) major.
 215          */
 216         if (S_ISCHR(mode) || S_ISBLK(mode)) {
 217                 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
 218                         return -EINVAL;
 219                 rdev = sysv_encode_dev(rdev);
 220         } else {
 221                 rdev = 0;
 222         }
 223
 224         if (IS_POSIXACL(dir)) {
 225                 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
 226                 if (IS_ERR(default_acl))
 227                         return -PTR_ERR(default_acl);
 228
 229                 if (!default_acl)
 230                         mode &= ~current_umask();
 231         }
 232
 233         xfs_dentry_to_name(&name, dentry);
 234         error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
 235         if (unlikely(error))
 236                 goto out_free_acl;
 237
 238         inode = VFS_I(ip);
 239
 240         error = xfs_init_security(inode, dir);
 241         if (unlikely(error))
 242                 goto out_cleanup_inode;
 243
 244         if (default_acl) {
 245                 error = -xfs_inherit_acl(inode, default_acl);
 246                 if (unlikely(error))
 247                         goto out_cleanup_inode;
 248                 posix_acl_release(default_acl);
 249         }
 250
 251
 252         d_instantiate(dentry, inode);
 253         return -error;
 254
 255  out_cleanup_inode:
 256         xfs_cleanup_inode(dir, inode, dentry);
 257  out_free_acl:
 258         posix_acl_release(default_acl);
 259         return -error;
 260 }
 261
 262 STATIC int
 263 xfs_vn_create(
 264         struct inode    *dir,
 265         struct dentry   *dentry,
 266         int             mode,
 267         struct nameidata *nd)
 268 {
 269         return xfs_vn_mknod(dir, dentry, mode, 0);
 270 }
 271
 272 STATIC int
 273 xfs_vn_mkdir(
 274         struct inode    *dir,
 275         struct dentry   *dentry,
 276         int             mode)
 277 {
 278         return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
 279 }
 280
 281 STATIC struct dentry *
 282 xfs_vn_lookup(
 283         struct inode    *dir,
 284         struct dentry   *dentry,
 285         struct nameidata *nd)
 286 {
 287         struct xfs_inode *cip;
 288         struct xfs_name name;
 289         int             error;
 290
 291         if (dentry->d_name.len >= MAXNAMELEN)
 292                 return ERR_PTR(-ENAMETOOLONG);
 293
 294         xfs_dentry_to_name(&name, dentry);
 295         error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
 296         if (unlikely(error)) {
 297                 if (unlikely(error != ENOENT))
 298                         return ERR_PTR(-error);
 299                 d_add(dentry, NULL);
 300                 return NULL;
 301         }
 302
 303         return d_splice_alias(VFS_I(cip), dentry);
 304 }
 305
 306 STATIC struct dentry *
 307 xfs_vn_ci_lookup(
 308         struct inode    *dir,
 309         struct dentry   *dentry,
 310         struct nameidata *nd)
 311 {
 312         struct xfs_inode *ip;
 313         struct xfs_name xname;
 314         struct xfs_name ci_name;
 315         struct qstr     dname;
 316         int             error;
 317
 318         if (dentry->d_name.len >= MAXNAMELEN)
 319                 return ERR_PTR(-ENAMETOOLONG);
 320
 321         xfs_dentry_to_name(&xname, dentry);
 322         error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
 323         if (unlikely(error)) {
 324                 if (unlikely(error != ENOENT))
 325                         return ERR_PTR(-error);
 326                 /*
 327                  * call d_add(dentry, NULL) here when d_drop_negative_children
 328                  * is called in xfs_vn_mknod (ie. allow negative dentries
 329                  * with CI filesystems).
 330                  */
 331                 return NULL;
 332         }
 333
 334         /* if exact match, just splice and exit */
 335         if (!ci_name.name)
 336                 return d_splice_alias(VFS_I(ip), dentry);
 337
 338         /* else case-insensitive match... */
 339         dname.name = ci_name.name;
 340         dname.len = ci_name.len;
 341         dentry = d_add_ci(dentry, VFS_I(ip), &dname);
 342         kmem_free(ci_name.name);
 343         return dentry;
 344 }
 345
 346 STATIC int
 347 xfs_vn_link(
 348         struct dentry   *old_dentry,
 349         struct inode    *dir,
 350         struct dentry   *dentry)
 351 {
 352         struct inode    *inode = old_dentry->d_inode;
 353         struct xfs_name name;
 354         int             error;
 355
 356         xfs_dentry_to_name(&name, dentry);
 357
 358         error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
 359         if (unlikely(error))
 360                 return -error;
 361
 362         atomic_inc(&inode->i_count);
 363         d_instantiate(dentry, inode);
 364         return 0;
 365 }
 366
 367 STATIC int
 368 xfs_vn_unlink(
 369         struct inode    *dir,
 370         struct dentry   *dentry)
 371 {
 372         struct xfs_name name;
 373         int             error;
 374
 375         xfs_dentry_to_name(&name, dentry);
 376
 377         error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
 378         if (error)
 379                 return error;
 380
 381         /*
 382          * With unlink, the VFS makes the dentry "negative": no inode,
 383          * but still hashed. This is incompatible with case-insensitive
 384          * mode, so invalidate (unhash) the dentry in CI-mode.
 385          */
 386         if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
 387                 d_invalidate(dentry);
 388         return 0;
 389 }
 390
 391 STATIC int
 392 xfs_vn_symlink(
 393         struct inode    *dir,
 394         struct dentry   *dentry,
 395         const char      *symname)
 396 {
 397         struct inode    *inode;
 398         struct xfs_inode *cip = NULL;
 399         struct xfs_name name;
 400         int             error;
 401         mode_t          mode;
 402
 403         mode = S_IFLNK |
 404                 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
 405         xfs_dentry_to_name(&name, dentry);
 406
 407         error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL);
 408         if (unlikely(error))
 409                 goto out;
 410
 411         inode = VFS_I(cip);
 412
 413         error = xfs_init_security(inode, dir);
 414         if (unlikely(error))
 415                 goto out_cleanup_inode;
 416
 417         d_instantiate(dentry, inode);
 418         return 0;
 419
 420  out_cleanup_inode:
 421         xfs_cleanup_inode(dir, inode, dentry);
 422  out:
 423         return -error;
 424 }
 425
 426 STATIC int
 427 xfs_vn_rename(
 428         struct inode    *odir,
 429         struct dentry   *odentry,
 430         struct inode    *ndir,
 431         struct dentry   *ndentry)
 432 {
 433         struct inode    *new_inode = ndentry->d_inode;
 434         struct xfs_name oname;
 435         struct xfs_name nname;
 436
 437         xfs_dentry_to_name(&oname, odentry);
 438         xfs_dentry_to_name(&nname, ndentry);
 439
 440         return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
 441                            XFS_I(ndir), &nname, new_inode ?
 442                                                 XFS_I(new_inode) : NULL);
 443 }
 444
 445 /*
 446  * careful here - this function can get called recursively, so
 447  * we need to be very careful about how much stack we use.
 448  * uio is kmalloced for this reason...
 449  */
 450 STATIC void *
 451 xfs_vn_follow_link(
 452         struct dentry           *dentry,
 453         struct nameidata        *nd)
 454 {
 455         char                    *link;
 456         int                     error = -ENOMEM;
 457
 458         link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
 459         if (!link)
 460                 goto out_err;
 461
 462         error = -xfs_readlink(XFS_I(dentry->d_inode), link);
 463         if (unlikely(error))
 464                 goto out_kfree;
 465
 466         nd_set_link(nd, link);
 467         return NULL;
 468
 469  out_kfree:
 470         kfree(link);
 471  out_err:
 472         nd_set_link(nd, ERR_PTR(error));
 473         return NULL;
 474 }
 475
 476 STATIC void
 477 xfs_vn_put_link(
 478         struct dentry   *dentry,
 479         struct nameidata *nd,
 480         void            *p)
 481 {
 482         char            *s = nd_get_link(nd);
 483
 484         if (!IS_ERR(s))
 485                 kfree(s);
 486 }
 487
 488 STATIC int
 489 xfs_vn_getattr(
 490         struct vfsmount         *mnt,
 491         struct dentry           *dentry,
 492         struct kstat            *stat)
 493 {
 494         struct inode            *inode = dentry->d_inode;
 495         struct xfs_inode        *ip = XFS_I(inode);
 496         struct xfs_mount        *mp = ip->i_mount;
 497
 498         xfs_itrace_entry(ip);
 499
 500         if (XFS_FORCED_SHUTDOWN(mp))
 501                 return XFS_ERROR(EIO);
 502
 503         stat->size = XFS_ISIZE(ip);
 504         stat->dev = inode->i_sb->s_dev;
 505         stat->mode = ip->i_d.di_mode;
 506         stat->nlink = ip->i_d.di_nlink;
 507         stat->uid = ip->i_d.di_uid;
 508         stat->gid = ip->i_d.di_gid;
 509         stat->ino = ip->i_ino;
 510         stat->atime = inode->i_atime;
 511         stat->mtime = inode->i_mtime;
 512         stat->ctime = inode->i_ctime;
 513         stat->blocks =
 514                 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
 515
 516
 517         switch (inode->i_mode & S_IFMT) {
 518         case S_IFBLK:
 519         case S_IFCHR:
 520                 stat->blksize = BLKDEV_IOSIZE;
 521                 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
 522                                    sysv_minor(ip->i_df.if_u2.if_rdev));
 523                 break;
 524         default:
 525                 if (XFS_IS_REALTIME_INODE(ip)) {
 526                         /*
 527                          * If the file blocks are being allocated from a
 528                          * realtime volume, then return the inode's realtime
 529                          * extent size or the realtime volume's extent size.
 530                          */
 531                         stat->blksize =
 532                                 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
 533                 } else
 534                         stat->blksize = xfs_preferred_iosize(mp);
 535                 stat->rdev = 0;
 536                 break;
 537         }
 538
 539         return 0;
 540 }
 541
 542 STATIC int
 543 xfs_vn_setattr(
 544         struct dentry   *dentry,
 545         struct iattr    *iattr)
 546 {
 547         return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0);
 548 }
 549
 550 /*
 551  * block_truncate_page can return an error, but we can't propagate it
 552  * at all here. Leave a complaint + stack trace in the syslog because
 553  * this could be bad. If it is bad, we need to propagate the error further.
 554  */
 555 STATIC void
 556 xfs_vn_truncate(
 557         struct inode    *inode)
 558 {
 559         int     error;
 560         error = block_truncate_page(inode->i_mapping, inode->i_size,
 561                                                         xfs_get_blocks);
 562         WARN_ON(error);
 563 }
 564
 565 STATIC long
 566 xfs_vn_fallocate(
 567         struct inode    *inode,
 568         int             mode,
 569         loff_t          offset,
 570         loff_t          len)
 571 {
 572         long            error;
 573         loff_t          new_size = 0;
 574         xfs_flock64_t   bf;
 575         xfs_inode_t     *ip = XFS_I(inode);
 576
 577         /* preallocation on directories not yet supported */
 578         error = -ENODEV;
 579         if (S_ISDIR(inode->i_mode))
 580                 goto out_error;
 581
 582         bf.l_whence = 0;
 583         bf.l_start = offset;
 584         bf.l_len = len;
 585
 586         xfs_ilock(ip, XFS_IOLOCK_EXCL);
 587         error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
 588                                        0, XFS_ATTR_NOLOCK);
 589         if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
 590             offset + len > i_size_read(inode))
 591                 new_size = offset + len;
 592
 593         /* Change file size if needed */
 594         if (new_size) {
 595                 struct iattr iattr;
 596
 597                 iattr.ia_valid = ATTR_SIZE;
 598                 iattr.ia_size = new_size;
 599                 error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK);
 600         }
 601
 602         xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 603 out_error:
 604         return error;
 605 }
 606
 607 #define XFS_FIEMAP_FLAGS        (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
 608
 609 /*
 610  * Call fiemap helper to fill in user data.
 611  * Returns positive errors to xfs_getbmap.
 612  */
 613 STATIC int
 614 xfs_fiemap_format(
 615         void                    **arg,
 616         struct getbmapx         *bmv,
 617         int                     *full)
 618 {
 619         int                     error;
 620         struct fiemap_extent_info *fieinfo = *arg;
 621         u32                     fiemap_flags = 0;
 622         u64                     logical, physical, length;
 623
 624         /* Do nothing for a hole */
 625         if (bmv->bmv_block == -1LL)
 626                 return 0;
 627
 628         logical = BBTOB(bmv->bmv_offset);
 629         physical = BBTOB(bmv->bmv_block);
 630         length = BBTOB(bmv->bmv_length);
 631
 632         if (bmv->bmv_oflags & BMV_OF_PREALLOC)
 633                 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
 634         else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
 635                 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
 636                 physical = 0;   /* no block yet */
 637         }
 638         if (bmv->bmv_oflags & BMV_OF_LAST)
 639                 fiemap_flags |= FIEMAP_EXTENT_LAST;
 640
 641         error = fiemap_fill_next_extent(fieinfo, logical, physical,
 642                                         length, fiemap_flags);
 643         if (error > 0) {
 644                 error = 0;
 645                 *full = 1;      /* user array now full */
 646         }
 647
 648         return -error;
 649 }
 650
 651 STATIC int
 652 xfs_vn_fiemap(
 653         struct inode            *inode,
 654         struct fiemap_extent_info *fieinfo,
 655         u64                     start,
 656         u64                     length)
 657 {
 658         xfs_inode_t             *ip = XFS_I(inode);
 659         struct getbmapx         bm;
 660         int                     error;
 661
 662         error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
 663         if (error)
 664                 return error;
 665
 666         /* Set up bmap header for xfs internal routine */
 667         bm.bmv_offset = BTOBB(start);
 668         /* Special case for whole file */
 669         if (length == FIEMAP_MAX_OFFSET)
 670                 bm.bmv_length = -1LL;
 671         else
 672                 bm.bmv_length = BTOBB(length);
 673
 674         /* We add one because in getbmap world count includes the header */
 675         bm.bmv_count = fieinfo->fi_extents_max + 1;
 676         bm.bmv_iflags = BMV_IF_PREALLOC;
 677         if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
 678                 bm.bmv_iflags |= BMV_IF_ATTRFORK;
 679         if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
 680                 bm.bmv_iflags |= BMV_IF_DELALLOC;
 681
 682         error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
 683         if (error)
 684                 return -error;
 685
 686         return 0;
 687 }
 688
 689 static const struct inode_operations xfs_inode_operations = {
 690         .check_acl              = xfs_check_acl,
 691         .truncate               = xfs_vn_truncate,
 692         .getattr                = xfs_vn_getattr,
 693         .setattr                = xfs_vn_setattr,
 694         .setxattr               = generic_setxattr,
 695         .getxattr               = generic_getxattr,
 696         .removexattr            = generic_removexattr,
 697         .listxattr              = xfs_vn_listxattr,
 698         .fallocate              = xfs_vn_fallocate,
 699         .fiemap                 = xfs_vn_fiemap,
 700 };
 701
 702 static const struct inode_operations xfs_dir_inode_operations = {
 703         .create                 = xfs_vn_create,
 704         .lookup                 = xfs_vn_lookup,
 705         .link                   = xfs_vn_link,
 706         .unlink                 = xfs_vn_unlink,
 707         .symlink                = xfs_vn_symlink,
 708         .mkdir                  = xfs_vn_mkdir,
 709         /*
 710          * Yes, XFS uses the same method for rmdir and unlink.
 711          *
 712          * There are some subtile differences deeper in the code,
 713          * but we use S_ISDIR to check for those.
 714          */
 715         .rmdir                  = xfs_vn_unlink,
 716         .mknod                  = xfs_vn_mknod,
 717         .rename                 = xfs_vn_rename,
 718         .check_acl              = xfs_check_acl,
 719         .getattr                = xfs_vn_getattr,
 720         .setattr                = xfs_vn_setattr,
 721         .setxattr               = generic_setxattr,
 722         .getxattr               = generic_getxattr,
 723         .removexattr            = generic_removexattr,
 724         .listxattr              = xfs_vn_listxattr,
 725 };
 726
 727 static const struct inode_operations xfs_dir_ci_inode_operations = {
 728         .create                 = xfs_vn_create,
 729         .lookup                 = xfs_vn_ci_lookup,
 730         .link                   = xfs_vn_link,
 731         .unlink                 = xfs_vn_unlink,
 732         .symlink                = xfs_vn_symlink,
 733         .mkdir                  = xfs_vn_mkdir,
 734         /*
 735          * Yes, XFS uses the same method for rmdir and unlink.
 736          *
 737          * There are some subtile differences deeper in the code,
 738          * but we use S_ISDIR to check for those.
 739          */
 740         .rmdir                  = xfs_vn_unlink,
 741         .mknod                  = xfs_vn_mknod,
 742         .rename                 = xfs_vn_rename,
 743         .check_acl              = xfs_check_acl,
 744         .getattr                = xfs_vn_getattr,
 745         .setattr                = xfs_vn_setattr,
 746         .setxattr               = generic_setxattr,
 747         .getxattr               = generic_getxattr,
 748         .removexattr            = generic_removexattr,
 749         .listxattr              = xfs_vn_listxattr,
 750 };
 751
 752 static const struct inode_operations xfs_symlink_inode_operations = {
 753         .readlink               = generic_readlink,
 754         .follow_link            = xfs_vn_follow_link,
 755         .put_link               = xfs_vn_put_link,
 756         .check_acl              = xfs_check_acl,
 757         .getattr                = xfs_vn_getattr,
 758         .setattr                = xfs_vn_setattr,
 759         .setxattr               = generic_setxattr,
 760         .getxattr               = generic_getxattr,
 761         .removexattr            = generic_removexattr,
 762         .listxattr              = xfs_vn_listxattr,
 763 };
 764
 765 STATIC void
 766 xfs_diflags_to_iflags(
 767         struct inode            *inode,
 768         struct xfs_inode        *ip)
 769 {
 770         if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
 771                 inode->i_flags |= S_IMMUTABLE;
 772         else
 773                 inode->i_flags &= ~S_IMMUTABLE;
 774         if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
 775                 inode->i_flags |= S_APPEND;
 776         else
 777                 inode->i_flags &= ~S_APPEND;
 778         if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
 779                 inode->i_flags |= S_SYNC;
 780         else
 781                 inode->i_flags &= ~S_SYNC;
 782         if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
 783                 inode->i_flags |= S_NOATIME;
 784         else
 785                 inode->i_flags &= ~S_NOATIME;
 786 }
 787
 788 /*
 789  * Initialize the Linux inode, set up the operation vectors and
 790  * unlock the inode.
 791  *
 792  * When reading existing inodes from disk this is called directly
 793  * from xfs_iget, when creating a new inode it is called from
 794  * xfs_ialloc after setting up the inode.
 795  *
 796  * We are always called with an uninitialised linux inode here.
 797  * We need to initialise the necessary fields and take a reference
 798  * on it.
 799  */
 800 void
 801 xfs_setup_inode(
 802         struct xfs_inode        *ip)
 803 {
 804         struct inode            *inode = &ip->i_vnode;
 805
 806         inode->i_ino = ip->i_ino;
 807         inode->i_state = I_NEW;
 808         inode_add_to_lists(ip->i_mount->m_super, inode);
 809
 810         inode->i_mode   = ip->i_d.di_mode;
 811         inode->i_nlink  = ip->i_d.di_nlink;
 812         inode->i_uid    = ip->i_d.di_uid;
 813         inode->i_gid    = ip->i_d.di_gid;
 814
 815         switch (inode->i_mode & S_IFMT) {
 816         case S_IFBLK:
 817         case S_IFCHR:
 818                 inode->i_rdev =
 819                         MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
 820                               sysv_minor(ip->i_df.if_u2.if_rdev));
 821                 break;
 822         default:
 823                 inode->i_rdev = 0;
 824                 break;
 825         }
 826
 827         inode->i_generation = ip->i_d.di_gen;
 828         i_size_write(inode, ip->i_d.di_size);
 829         inode->i_atime.tv_sec   = ip->i_d.di_atime.t_sec;
 830         inode->i_atime.tv_nsec  = ip->i_d.di_atime.t_nsec;
 831         inode->i_mtime.tv_sec   = ip->i_d.di_mtime.t_sec;
 832         inode->i_mtime.tv_nsec  = ip->i_d.di_mtime.t_nsec;
 833         inode->i_ctime.tv_sec   = ip->i_d.di_ctime.t_sec;
 834         inode->i_ctime.tv_nsec  = ip->i_d.di_ctime.t_nsec;
 835         xfs_diflags_to_iflags(inode, ip);
 836
 837         switch (inode->i_mode & S_IFMT) {
 838         case S_IFREG:
 839                 inode->i_op = &xfs_inode_operations;
 840                 inode->i_fop = &xfs_file_operations;
 841                 inode->i_mapping->a_ops = &xfs_address_space_operations;
 842                 break;
 843         case S_IFDIR:
 844                 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
 845                         inode->i_op = &xfs_dir_ci_inode_operations;
 846                 else
 847                         inode->i_op = &xfs_dir_inode_operations;
 848                 inode->i_fop = &xfs_dir_file_operations;
 849                 break;
 850         case S_IFLNK:
 851                 inode->i_op = &xfs_symlink_inode_operations;
 852                 if (!(ip->i_df.if_flags & XFS_IFINLINE))
 853                         inode->i_mapping->a_ops = &xfs_address_space_operations;
 854                 break;
 855         default:
 856                 inode->i_op = &xfs_inode_operations;
 857                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 858                 break;
 859         }
 860
 861         xfs_iflags_clear(ip, XFS_INEW);
 862         barrier();
 863
 864         unlock_new_inode(inode);
 865 }