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_dir.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_dir_sf.h"
  36 #include "xfs_dir2_sf.h"
  37 #include "xfs_attr_sf.h"
  38 #include "xfs_dinode.h"
  39 #include "xfs_inode.h"
  40 #include "xfs_bmap.h"
  41 #include "xfs_btree.h"
  42 #include "xfs_ialloc.h"
  43 #include "xfs_rtalloc.h"
  44 #include "xfs_error.h"
  45 #include "xfs_itable.h"
  46 #include "xfs_rw.h"
  47 #include "xfs_acl.h"
  48 #include "xfs_cap.h"
  49 #include "xfs_mac.h"
  50 #include "xfs_attr.h"
  51 #include "xfs_buf_item.h"
  52 #include "xfs_utils.h"
  53
  54 #include <linux/capability.h>
  55 #include <linux/xattr.h>
  56 #include <linux/namei.h>
  57 #include <linux/security.h>
  58
  59 /*
  60  * Get a XFS inode from a given vnode.
  61  */
  62 xfs_inode_t *
  63 xfs_vtoi(
  64         bhv_vnode_t     *vp)
  65 {
  66         bhv_desc_t      *bdp;
  67
  68         bdp = bhv_lookup_range(VN_BHV_HEAD(vp),
  69                         VNODE_POSITION_XFS, VNODE_POSITION_XFS);
  70         if (unlikely(bdp == NULL))
  71                 return NULL;
  72         return XFS_BHVTOI(bdp);
  73 }
  74
  75 /*
  76  * Bring the atime in the XFS inode uptodate.
  77  * Used before logging the inode to disk or when the Linux inode goes away.
  78  */
  79 void
  80 xfs_synchronize_atime(
  81         xfs_inode_t     *ip)
  82 {
  83         bhv_vnode_t     *vp;
  84
  85         vp = XFS_ITOV_NULL(ip);
  86         if (vp) {
  87                 struct inode *inode = &vp->v_inode;
  88                 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
  89                 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
  90         }
  91 }
  92
  93 /*
  94  * Change the requested timestamp in the given inode.
  95  * We don't lock across timestamp updates, and we don't log them but
  96  * we do record the fact that there is dirty information in core.
  97  *
  98  * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
  99  *              with XFS_ICHGTIME_ACC to be sure that access time
 100  *              update will take.  Calling first with XFS_ICHGTIME_ACC
 101  *              and then XFS_ICHGTIME_MOD may fail to modify the access
 102  *              timestamp if the filesystem is mounted noacctm.
 103  */
 104 void
 105 xfs_ichgtime(
 106         xfs_inode_t     *ip,
 107         int             flags)
 108 {
 109         struct inode    *inode = vn_to_inode(XFS_ITOV(ip));
 110         timespec_t      tv;
 111
 112         nanotime(&tv);
 113         if (flags & XFS_ICHGTIME_MOD) {
 114                 inode->i_mtime = tv;
 115                 ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
 116                 ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
 117         }
 118         if (flags & XFS_ICHGTIME_ACC) {
 119                 inode->i_atime = tv;
 120                 ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
 121                 ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
 122         }
 123         if (flags & XFS_ICHGTIME_CHG) {
 124                 inode->i_ctime = tv;
 125                 ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
 126                 ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
 127         }
 128
 129         /*
 130          * We update the i_update_core field _after_ changing
 131          * the timestamps in order to coordinate properly with
 132          * xfs_iflush() so that we don't lose timestamp updates.
 133          * This keeps us from having to hold the inode lock
 134          * while doing this.  We use the SYNCHRONIZE macro to
 135          * ensure that the compiler does not reorder the update
 136          * of i_update_core above the timestamp updates above.
 137          */
 138         SYNCHRONIZE();
 139         ip->i_update_core = 1;
 140         if (!(inode->i_state & I_LOCK))
 141                 mark_inode_dirty_sync(inode);
 142 }
 143
 144 /*
 145  * Variant on the above which avoids querying the system clock
 146  * in situations where we know the Linux inode timestamps have
 147  * just been updated (and so we can update our inode cheaply).
 148  */
 149 void
 150 xfs_ichgtime_fast(
 151         xfs_inode_t     *ip,
 152         struct inode    *inode,
 153         int             flags)
 154 {
 155         timespec_t      *tvp;
 156
 157         /*
 158          * Atime updates for read() & friends are handled lazily now, and
 159          * explicit updates must go through xfs_ichgtime()
 160          */
 161         ASSERT((flags & XFS_ICHGTIME_ACC) == 0);
 162
 163         /*
 164          * We're not supposed to change timestamps in readonly-mounted
 165          * filesystems.  Throw it away if anyone asks us.
 166          */
 167         if (unlikely(IS_RDONLY(inode)))
 168                 return;
 169
 170         if (flags & XFS_ICHGTIME_MOD) {
 171                 tvp = &inode->i_mtime;
 172                 ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
 173                 ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
 174         }
 175         if (flags & XFS_ICHGTIME_CHG) {
 176                 tvp = &inode->i_ctime;
 177                 ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
 178                 ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
 179         }
 180
 181         /*
 182          * We update the i_update_core field _after_ changing
 183          * the timestamps in order to coordinate properly with
 184          * xfs_iflush() so that we don't lose timestamp updates.
 185          * This keeps us from having to hold the inode lock
 186          * while doing this.  We use the SYNCHRONIZE macro to
 187          * ensure that the compiler does not reorder the update
 188          * of i_update_core above the timestamp updates above.
 189          */
 190         SYNCHRONIZE();
 191         ip->i_update_core = 1;
 192         if (!(inode->i_state & I_LOCK))
 193                 mark_inode_dirty_sync(inode);
 194 }
 195
 196
 197 /*
 198  * Pull the link count and size up from the xfs inode to the linux inode
 199  */
 200 STATIC void
 201 xfs_validate_fields(
 202         struct inode    *ip,
 203         bhv_vattr_t     *vattr)
 204 {
 205         vattr->va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS;
 206         if (!bhv_vop_getattr(vn_from_inode(ip), vattr, ATTR_LAZY, NULL)) {
 207                 ip->i_nlink = vattr->va_nlink;
 208                 ip->i_blocks = vattr->va_nblocks;
 209
 210                 /* we're under i_sem so i_size can't change under us */
 211                 if (i_size_read(ip) != vattr->va_size)
 212                         i_size_write(ip, vattr->va_size);
 213         }
 214 }
 215
 216 /*
 217  * Hook in SELinux.  This is not quite correct yet, what we really need
 218  * here (as we do for default ACLs) is a mechanism by which creation of
 219  * these attrs can be journalled at inode creation time (along with the
 220  * inode, of course, such that log replay can't cause these to be lost).
 221  */
 222 STATIC int
 223 xfs_init_security(
 224         bhv_vnode_t     *vp,
 225         struct inode    *dir)
 226 {
 227         struct inode    *ip = vn_to_inode(vp);
 228         size_t          length;
 229         void            *value;
 230         char            *name;
 231         int             error;
 232
 233         error = security_inode_init_security(ip, dir, &name, &value, &length);
 234         if (error) {
 235                 if (error == -EOPNOTSUPP)
 236                         return 0;
 237                 return -error;
 238         }
 239
 240         error = bhv_vop_attr_set(vp, name, value, length, ATTR_SECURE, NULL);
 241         if (!error)
 242                 VMODIFY(vp);
 243
 244         kfree(name);
 245         kfree(value);
 246         return error;
 247 }
 248
 249 /*
 250  * Determine whether a process has a valid fs_struct (kernel daemons
 251  * like knfsd don't have an fs_struct).
 252  *
 253  * XXX(hch):  nfsd is broken, better fix it instead.
 254  */
 255 STATIC inline int
 256 xfs_has_fs_struct(struct task_struct *task)
 257 {
 258         return (task->fs != init_task.fs);
 259 }
 260
 261 STATIC inline void
 262 xfs_cleanup_inode(
 263         bhv_vnode_t     *dvp,
 264         bhv_vnode_t     *vp,
 265         struct dentry   *dentry,
 266         int             mode)
 267 {
 268         struct dentry   teardown = {};
 269
 270         /* Oh, the horror.
 271          * If we can't add the ACL or we fail in
 272          * xfs_init_security we must back out.
 273          * ENOSPC can hit here, among other things.
 274          */
 275         teardown.d_inode = vn_to_inode(vp);
 276         teardown.d_name = dentry->d_name;
 277
 278         if (S_ISDIR(mode))
 279                 bhv_vop_rmdir(dvp, &teardown, NULL);
 280         else
 281                 bhv_vop_remove(dvp, &teardown, NULL);
 282         VN_RELE(vp);
 283 }
 284
 285 STATIC int
 286 xfs_vn_mknod(
 287         struct inode    *dir,
 288         struct dentry   *dentry,
 289         int             mode,
 290         dev_t           rdev)
 291 {
 292         struct inode    *ip;
 293         bhv_vattr_t     vattr = { 0 };
 294         bhv_vnode_t     *vp = NULL, *dvp = vn_from_inode(dir);
 295         xfs_acl_t       *default_acl = NULL;
 296         attrexists_t    test_default_acl = _ACL_DEFAULT_EXISTS;
 297         int             error;
 298
 299         /*
 300          * Irix uses Missed'em'V split, but doesn't want to see
 301          * the upper 5 bits of (14bit) major.
 302          */
 303         if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
 304                 return -EINVAL;
 305
 306         if (unlikely(test_default_acl && test_default_acl(dvp))) {
 307                 if (!_ACL_ALLOC(default_acl)) {
 308                         return -ENOMEM;
 309                 }
 310                 if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
 311                         _ACL_FREE(default_acl);
 312                         default_acl = NULL;
 313                 }
 314         }
 315
 316         if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current))
 317                 mode &= ~current->fs->umask;
 318
 319         vattr.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
 320         vattr.va_mode = mode;
 321
 322         switch (mode & S_IFMT) {
 323         case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
 324                 vattr.va_rdev = sysv_encode_dev(rdev);
 325                 vattr.va_mask |= XFS_AT_RDEV;
 326                 /*FALLTHROUGH*/
 327         case S_IFREG:
 328                 error = bhv_vop_create(dvp, dentry, &vattr, &vp, NULL);
 329                 break;
 330         case S_IFDIR:
 331                 error = bhv_vop_mkdir(dvp, dentry, &vattr, &vp, NULL);
 332                 break;
 333         default:
 334                 error = EINVAL;
 335                 break;
 336         }
 337
 338         if (unlikely(!error)) {
 339                 error = xfs_init_security(vp, dir);
 340                 if (error)
 341                         xfs_cleanup_inode(dvp, vp, dentry, mode);
 342         }
 343
 344         if (unlikely(default_acl)) {
 345                 if (!error) {
 346                         error = _ACL_INHERIT(vp, &vattr, default_acl);
 347                         if (!error)
 348                                 VMODIFY(vp);
 349                         else
 350                                 xfs_cleanup_inode(dvp, vp, dentry, mode);
 351                 }
 352                 _ACL_FREE(default_acl);
 353         }
 354
 355         if (likely(!error)) {
 356                 ASSERT(vp);
 357                 ip = vn_to_inode(vp);
 358
 359                 if (S_ISCHR(mode) || S_ISBLK(mode))
 360                         ip->i_rdev = rdev;
 361                 else if (S_ISDIR(mode))
 362                         xfs_validate_fields(ip, &vattr);
 363                 d_instantiate(dentry, ip);
 364                 xfs_validate_fields(dir, &vattr);
 365         }
 366         return -error;
 367 }
 368
 369 STATIC int
 370 xfs_vn_create(
 371         struct inode    *dir,
 372         struct dentry   *dentry,
 373         int             mode,
 374         struct nameidata *nd)
 375 {
 376         return xfs_vn_mknod(dir, dentry, mode, 0);
 377 }
 378
 379 STATIC int
 380 xfs_vn_mkdir(
 381         struct inode    *dir,
 382         struct dentry   *dentry,
 383         int             mode)
 384 {
 385         return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
 386 }
 387
 388 STATIC struct dentry *
 389 xfs_vn_lookup(
 390         struct inode    *dir,
 391         struct dentry   *dentry,
 392         struct nameidata *nd)
 393 {
 394         bhv_vnode_t     *vp = vn_from_inode(dir), *cvp;
 395         int             error;
 396
 397         if (dentry->d_name.len >= MAXNAMELEN)
 398                 return ERR_PTR(-ENAMETOOLONG);
 399
 400         error = bhv_vop_lookup(vp, dentry, &cvp, 0, NULL, NULL);
 401         if (unlikely(error)) {
 402                 if (unlikely(error != ENOENT))
 403                         return ERR_PTR(-error);
 404                 d_add(dentry, NULL);
 405                 return NULL;
 406         }
 407
 408         return d_splice_alias(vn_to_inode(cvp), dentry);
 409 }
 410
 411 STATIC int
 412 xfs_vn_link(
 413         struct dentry   *old_dentry,
 414         struct inode    *dir,
 415         struct dentry   *dentry)
 416 {
 417         struct inode    *ip;    /* inode of guy being linked to */
 418         bhv_vnode_t     *tdvp;  /* target directory for new name/link */
 419         bhv_vnode_t     *vp;    /* vp of name being linked */
 420         bhv_vattr_t     vattr;
 421         int             error;
 422
 423         ip = old_dentry->d_inode;       /* inode being linked to */
 424         if (S_ISDIR(ip->i_mode))
 425                 return -EPERM;
 426
 427         tdvp = vn_from_inode(dir);
 428         vp = vn_from_inode(ip);
 429
 430         error = bhv_vop_link(tdvp, vp, dentry, NULL);
 431         if (likely(!error)) {
 432                 VMODIFY(tdvp);
 433                 VN_HOLD(vp);
 434                 xfs_validate_fields(ip, &vattr);
 435                 d_instantiate(dentry, ip);
 436         }
 437         return -error;
 438 }
 439
 440 STATIC int
 441 xfs_vn_unlink(
 442         struct inode    *dir,
 443         struct dentry   *dentry)
 444 {
 445         struct inode    *inode;
 446         bhv_vnode_t     *dvp;   /* directory containing name to remove */
 447         bhv_vattr_t     vattr;
 448         int             error;
 449
 450         inode = dentry->d_inode;
 451         dvp = vn_from_inode(dir);
 452
 453         error = bhv_vop_remove(dvp, dentry, NULL);
 454         if (likely(!error)) {
 455                 xfs_validate_fields(dir, &vattr);       /* size needs update */
 456                 xfs_validate_fields(inode, &vattr);
 457         }
 458         return -error;
 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    *ip;
 468         bhv_vattr_t     va = { 0 };
 469         bhv_vnode_t     *dvp;   /* directory containing name of symlink */
 470         bhv_vnode_t     *cvp;   /* used to lookup symlink to put in dentry */
 471         int             error;
 472
 473         dvp = vn_from_inode(dir);
 474         cvp = NULL;
 475
 476         va.va_mode = S_IFLNK |
 477                 (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
 478         va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
 479
 480         error = bhv_vop_symlink(dvp, dentry, &va, (char *)symname, &cvp, NULL);
 481         if (likely(!error && cvp)) {
 482                 error = xfs_init_security(cvp, dir);
 483                 if (likely(!error)) {
 484                         ip = vn_to_inode(cvp);
 485                         d_instantiate(dentry, ip);
 486                         xfs_validate_fields(dir, &va);
 487                         xfs_validate_fields(ip, &va);
 488                 } else {
 489                         xfs_cleanup_inode(dvp, cvp, dentry, 0);
 490                 }
 491         }
 492         return -error;
 493 }
 494
 495 STATIC int
 496 xfs_vn_rmdir(
 497         struct inode    *dir,
 498         struct dentry   *dentry)
 499 {
 500         struct inode    *inode = dentry->d_inode;
 501         bhv_vnode_t     *dvp = vn_from_inode(dir);
 502         bhv_vattr_t     vattr;
 503         int             error;
 504
 505         error = bhv_vop_rmdir(dvp, dentry, NULL);
 506         if (likely(!error)) {
 507                 xfs_validate_fields(inode, &vattr);
 508                 xfs_validate_fields(dir, &vattr);
 509         }
 510         return -error;
 511 }
 512
 513 STATIC int
 514 xfs_vn_rename(
 515         struct inode    *odir,
 516         struct dentry   *odentry,
 517         struct inode    *ndir,
 518         struct dentry   *ndentry)
 519 {
 520         struct inode    *new_inode = ndentry->d_inode;
 521         bhv_vnode_t     *fvp;   /* from directory */
 522         bhv_vnode_t     *tvp;   /* target directory */
 523         bhv_vattr_t     vattr;
 524         int             error;
 525
 526         fvp = vn_from_inode(odir);
 527         tvp = vn_from_inode(ndir);
 528
 529         error = bhv_vop_rename(fvp, odentry, tvp, ndentry, NULL);
 530         if (likely(!error)) {
 531                 if (new_inode)
 532                         xfs_validate_fields(new_inode, &vattr);
 533                 xfs_validate_fields(odir, &vattr);
 534                 if (ndir != odir)
 535                         xfs_validate_fields(ndir, &vattr);
 536         }
 537         return -error;
 538 }
 539
 540 /*
 541  * careful here - this function can get called recursively, so
 542  * we need to be very careful about how much stack we use.
 543  * uio is kmalloced for this reason...
 544  */
 545 STATIC void *
 546 xfs_vn_follow_link(
 547         struct dentry           *dentry,
 548         struct nameidata        *nd)
 549 {
 550         bhv_vnode_t             *vp;
 551         uio_t                   *uio;
 552         iovec_t                 iov;
 553         int                     error;
 554         char                    *link;
 555
 556         ASSERT(dentry);
 557         ASSERT(nd);
 558
 559         link = (char *)kmalloc(MAXPATHLEN+1, GFP_KERNEL);
 560         if (!link) {
 561                 nd_set_link(nd, ERR_PTR(-ENOMEM));
 562                 return NULL;
 563         }
 564
 565         uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL);
 566         if (!uio) {
 567                 kfree(link);
 568                 nd_set_link(nd, ERR_PTR(-ENOMEM));
 569                 return NULL;
 570         }
 571
 572         vp = vn_from_inode(dentry->d_inode);
 573
 574         iov.iov_base = link;
 575         iov.iov_len = MAXPATHLEN;
 576
 577         uio->uio_iov = &iov;
 578         uio->uio_offset = 0;
 579         uio->uio_segflg = UIO_SYSSPACE;
 580         uio->uio_resid = MAXPATHLEN;
 581         uio->uio_iovcnt = 1;
 582
 583         error = bhv_vop_readlink(vp, uio, 0, NULL);
 584         if (unlikely(error)) {
 585                 kfree(link);
 586                 link = ERR_PTR(-error);
 587         } else {
 588                 link[MAXPATHLEN - uio->uio_resid] = '\0';
 589         }
 590         kfree(uio);
 591
 592         nd_set_link(nd, link);
 593         return NULL;
 594 }
 595
 596 STATIC void
 597 xfs_vn_put_link(
 598         struct dentry   *dentry,
 599         struct nameidata *nd,
 600         void            *p)
 601 {
 602         char            *s = nd_get_link(nd);
 603
 604         if (!IS_ERR(s))
 605                 kfree(s);
 606 }
 607
 608 #ifdef CONFIG_XFS_POSIX_ACL
 609 STATIC int
 610 xfs_vn_permission(
 611         struct inode    *inode,
 612         int             mode,
 613         struct nameidata *nd)
 614 {
 615         return -bhv_vop_access(vn_from_inode(inode), mode << 6, NULL);
 616 }
 617 #else
 618 #define xfs_vn_permission NULL
 619 #endif
 620
 621 STATIC int
 622 xfs_vn_getattr(
 623         struct vfsmount *mnt,
 624         struct dentry   *dentry,
 625         struct kstat    *stat)
 626 {
 627         struct inode    *inode = dentry->d_inode;
 628         bhv_vnode_t     *vp = vn_from_inode(inode);
 629         int             error = 0;
 630
 631         if (unlikely(vp->v_flag & VMODIFIED))
 632                 error = vn_revalidate(vp);
 633         if (!error)
 634                 generic_fillattr(inode, stat);
 635         return -error;
 636 }
 637
 638 STATIC int
 639 xfs_vn_setattr(
 640         struct dentry   *dentry,
 641         struct iattr    *attr)
 642 {
 643         struct inode    *inode = dentry->d_inode;
 644         unsigned int    ia_valid = attr->ia_valid;
 645         bhv_vnode_t     *vp = vn_from_inode(inode);
 646         bhv_vattr_t     vattr = { 0 };
 647         int             flags = 0;
 648         int             error;
 649
 650         if (ia_valid & ATTR_UID) {
 651                 vattr.va_mask |= XFS_AT_UID;
 652                 vattr.va_uid = attr->ia_uid;
 653         }
 654         if (ia_valid & ATTR_GID) {
 655                 vattr.va_mask |= XFS_AT_GID;
 656                 vattr.va_gid = attr->ia_gid;
 657         }
 658         if (ia_valid & ATTR_SIZE) {
 659                 vattr.va_mask |= XFS_AT_SIZE;
 660                 vattr.va_size = attr->ia_size;
 661         }
 662         if (ia_valid & ATTR_ATIME) {
 663                 vattr.va_mask |= XFS_AT_ATIME;
 664                 vattr.va_atime = attr->ia_atime;
 665                 inode->i_atime = attr->ia_atime;
 666         }
 667         if (ia_valid & ATTR_MTIME) {
 668                 vattr.va_mask |= XFS_AT_MTIME;
 669                 vattr.va_mtime = attr->ia_mtime;
 670         }
 671         if (ia_valid & ATTR_CTIME) {
 672                 vattr.va_mask |= XFS_AT_CTIME;
 673                 vattr.va_ctime = attr->ia_ctime;
 674         }
 675         if (ia_valid & ATTR_MODE) {
 676                 vattr.va_mask |= XFS_AT_MODE;
 677                 vattr.va_mode = attr->ia_mode;
 678                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 679                         inode->i_mode &= ~S_ISGID;
 680         }
 681
 682         if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
 683                 flags |= ATTR_UTIME;
 684 #ifdef ATTR_NO_BLOCK
 685         if ((ia_valid & ATTR_NO_BLOCK))
 686                 flags |= ATTR_NONBLOCK;
 687 #endif
 688
 689         error = bhv_vop_setattr(vp, &vattr, flags, NULL);
 690         if (likely(!error))
 691                 __vn_revalidate(vp, &vattr);
 692         return -error;
 693 }
 694
 695 STATIC void
 696 xfs_vn_truncate(
 697         struct inode    *inode)
 698 {
 699         block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks);
 700 }
 701
 702 STATIC int
 703 xfs_vn_setxattr(
 704         struct dentry   *dentry,
 705         const char      *name,
 706         const void      *data,
 707         size_t          size,
 708         int             flags)
 709 {
 710         bhv_vnode_t     *vp = vn_from_inode(dentry->d_inode);
 711         char            *attr = (char *)name;
 712         attrnames_t     *namesp;
 713         int             xflags = 0;
 714         int             error;
 715
 716         namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 717         if (!namesp)
 718                 return -EOPNOTSUPP;
 719         attr += namesp->attr_namelen;
 720         error = namesp->attr_capable(vp, NULL);
 721         if (error)
 722                 return error;
 723
 724         /* Convert Linux syscall to XFS internal ATTR flags */
 725         if (flags & XATTR_CREATE)
 726                 xflags |= ATTR_CREATE;
 727         if (flags & XATTR_REPLACE)
 728                 xflags |= ATTR_REPLACE;
 729         xflags |= namesp->attr_flag;
 730         return namesp->attr_set(vp, attr, (void *)data, size, xflags);
 731 }
 732
 733 STATIC ssize_t
 734 xfs_vn_getxattr(
 735         struct dentry   *dentry,
 736         const char      *name,
 737         void            *data,
 738         size_t          size)
 739 {
 740         bhv_vnode_t     *vp = vn_from_inode(dentry->d_inode);
 741         char            *attr = (char *)name;
 742         attrnames_t     *namesp;
 743         int             xflags = 0;
 744         ssize_t         error;
 745
 746         namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 747         if (!namesp)
 748                 return -EOPNOTSUPP;
 749         attr += namesp->attr_namelen;
 750         error = namesp->attr_capable(vp, NULL);
 751         if (error)
 752                 return error;
 753
 754         /* Convert Linux syscall to XFS internal ATTR flags */
 755         if (!size) {
 756                 xflags |= ATTR_KERNOVAL;
 757                 data = NULL;
 758         }
 759         xflags |= namesp->attr_flag;
 760         return namesp->attr_get(vp, attr, (void *)data, size, xflags);
 761 }
 762
 763 STATIC ssize_t
 764 xfs_vn_listxattr(
 765         struct dentry           *dentry,
 766         char                    *data,
 767         size_t                  size)
 768 {
 769         bhv_vnode_t             *vp = vn_from_inode(dentry->d_inode);
 770         int                     error, xflags = ATTR_KERNAMELS;
 771         ssize_t                 result;
 772
 773         if (!size)
 774                 xflags |= ATTR_KERNOVAL;
 775         xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
 776
 777         error = attr_generic_list(vp, data, size, xflags, &result);
 778         if (error < 0)
 779                 return error;
 780         return result;
 781 }
 782
 783 STATIC int
 784 xfs_vn_removexattr(
 785         struct dentry   *dentry,
 786         const char      *name)
 787 {
 788         bhv_vnode_t     *vp = vn_from_inode(dentry->d_inode);
 789         char            *attr = (char *)name;
 790         attrnames_t     *namesp;
 791         int             xflags = 0;
 792         int             error;
 793
 794         namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 795         if (!namesp)
 796                 return -EOPNOTSUPP;
 797         attr += namesp->attr_namelen;
 798         error = namesp->attr_capable(vp, NULL);
 799         if (error)
 800                 return error;
 801         xflags |= namesp->attr_flag;
 802         return namesp->attr_remove(vp, attr, xflags);
 803 }
 804
 805
 806 struct inode_operations xfs_inode_operations = {
 807         .permission             = xfs_vn_permission,
 808         .truncate               = xfs_vn_truncate,
 809         .getattr                = xfs_vn_getattr,
 810         .setattr                = xfs_vn_setattr,
 811         .setxattr               = xfs_vn_setxattr,
 812         .getxattr               = xfs_vn_getxattr,
 813         .listxattr              = xfs_vn_listxattr,
 814         .removexattr            = xfs_vn_removexattr,
 815 };
 816
 817 struct inode_operations xfs_dir_inode_operations = {
 818         .create                 = xfs_vn_create,
 819         .lookup                 = xfs_vn_lookup,
 820         .link                   = xfs_vn_link,
 821         .unlink                 = xfs_vn_unlink,
 822         .symlink                = xfs_vn_symlink,
 823         .mkdir                  = xfs_vn_mkdir,
 824         .rmdir                  = xfs_vn_rmdir,
 825         .mknod                  = xfs_vn_mknod,
 826         .rename                 = xfs_vn_rename,
 827         .permission             = xfs_vn_permission,
 828         .getattr                = xfs_vn_getattr,
 829         .setattr                = xfs_vn_setattr,
 830         .setxattr               = xfs_vn_setxattr,
 831         .getxattr               = xfs_vn_getxattr,
 832         .listxattr              = xfs_vn_listxattr,
 833         .removexattr            = xfs_vn_removexattr,
 834 };
 835
 836 struct inode_operations xfs_symlink_inode_operations = {
 837         .readlink               = generic_readlink,
 838         .follow_link            = xfs_vn_follow_link,
 839         .put_link               = xfs_vn_put_link,
 840         .permission             = xfs_vn_permission,
 841         .getattr                = xfs_vn_getattr,
 842         .setattr                = xfs_vn_setattr,
 843         .setxattr               = xfs_vn_setxattr,
 844         .getxattr               = xfs_vn_getxattr,
 845         .listxattr              = xfs_vn_listxattr,
 846         .removexattr            = xfs_vn_removexattr,
 847 };