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         struct vnode    *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         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 = LINVFS_GET_IP(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 validate_fields(
 202         struct inode    *ip)
 203 {
 204         vnode_t         *vp = LINVFS_GET_VP(ip);
 205         vattr_t         va;
 206         int             error;
 207
 208         va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS;
 209         VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error);
 210         if (likely(!error)) {
 211                 ip->i_nlink = va.va_nlink;
 212                 ip->i_blocks = va.va_nblocks;
 213
 214                 /* we're under i_mutex so i_size can't change under us */
 215                 if (i_size_read(ip) != va.va_size)
 216                         i_size_write(ip, va.va_size);
 217         }
 218 }
 219
 220 /*
 221  * Hook in SELinux.  This is not quite correct yet, what we really need
 222  * here (as we do for default ACLs) is a mechanism by which creation of
 223  * these attrs can be journalled at inode creation time (along with the
 224  * inode, of course, such that log replay can't cause these to be lost).
 225  */
 226 STATIC int
 227 linvfs_init_security(
 228         struct vnode    *vp,
 229         struct inode    *dir)
 230 {
 231         struct inode    *ip = LINVFS_GET_IP(vp);
 232         size_t          length;
 233         void            *value;
 234         char            *name;
 235         int             error;
 236
 237         error = security_inode_init_security(ip, dir, &name, &value, &length);
 238         if (error) {
 239                 if (error == -EOPNOTSUPP)
 240                         return 0;
 241                 return -error;
 242         }
 243
 244         VOP_ATTR_SET(vp, name, value, length, ATTR_SECURE, NULL, error);
 245         if (!error)
 246                 VMODIFY(vp);
 247
 248         kfree(name);
 249         kfree(value);
 250         return error;
 251 }
 252
 253 /*
 254  * Determine whether a process has a valid fs_struct (kernel daemons
 255  * like knfsd don't have an fs_struct).
 256  *
 257  * XXX(hch):  nfsd is broken, better fix it instead.
 258  */
 259 STATIC inline int
 260 has_fs_struct(struct task_struct *task)
 261 {
 262         return (task->fs != init_task.fs);
 263 }
 264
 265 STATIC int
 266 linvfs_mknod(
 267         struct inode    *dir,
 268         struct dentry   *dentry,
 269         int             mode,
 270         dev_t           rdev)
 271 {
 272         struct inode    *ip;
 273         vattr_t         va;
 274         vnode_t         *vp = NULL, *dvp = LINVFS_GET_VP(dir);
 275         xfs_acl_t       *default_acl = NULL;
 276         attrexists_t    test_default_acl = _ACL_DEFAULT_EXISTS;
 277         int             error;
 278
 279         /*
 280          * Irix uses Missed'em'V split, but doesn't want to see
 281          * the upper 5 bits of (14bit) major.
 282          */
 283         if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)
 284                 return -EINVAL;
 285
 286         if (test_default_acl && test_default_acl(dvp)) {
 287                 if (!_ACL_ALLOC(default_acl))
 288                         return -ENOMEM;
 289                 if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
 290                         _ACL_FREE(default_acl);
 291                         default_acl = NULL;
 292                 }
 293         }
 294
 295         if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current))
 296                 mode &= ~current->fs->umask;
 297
 298         memset(&va, 0, sizeof(va));
 299         va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
 300         va.va_mode = mode;
 301
 302         switch (mode & S_IFMT) {
 303         case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
 304                 va.va_rdev = sysv_encode_dev(rdev);
 305                 va.va_mask |= XFS_AT_RDEV;
 306                 /*FALLTHROUGH*/
 307         case S_IFREG:
 308                 VOP_CREATE(dvp, dentry, &va, &vp, NULL, error);
 309                 break;
 310         case S_IFDIR:
 311                 VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error);
 312                 break;
 313         default:
 314                 error = EINVAL;
 315                 break;
 316         }
 317
 318         if (!error)
 319                 error = linvfs_init_security(vp, dir);
 320
 321         if (default_acl) {
 322                 if (!error) {
 323                         error = _ACL_INHERIT(vp, &va, default_acl);
 324                         if (!error) {
 325                                 VMODIFY(vp);
 326                         } else {
 327                                 struct dentry   teardown = {};
 328                                 int             err2;
 329
 330                                 /* Oh, the horror.
 331                                  * If we can't add the ACL we must back out.
 332                                  * ENOSPC can hit here, among other things.
 333                                  */
 334                                 teardown.d_inode = ip = LINVFS_GET_IP(vp);
 335                                 teardown.d_name = dentry->d_name;
 336
 337                                 if (S_ISDIR(mode))
 338                                         VOP_RMDIR(dvp, &teardown, NULL, err2);
 339                                 else
 340                                         VOP_REMOVE(dvp, &teardown, NULL, err2);
 341                                 VN_RELE(vp);
 342                         }
 343                 }
 344                 _ACL_FREE(default_acl);
 345         }
 346
 347         if (!error) {
 348                 ASSERT(vp);
 349                 ip = LINVFS_GET_IP(vp);
 350
 351                 if (S_ISCHR(mode) || S_ISBLK(mode))
 352                         ip->i_rdev = rdev;
 353                 else if (S_ISDIR(mode))
 354                         validate_fields(ip);
 355                 d_instantiate(dentry, ip);
 356                 validate_fields(dir);
 357         }
 358         return -error;
 359 }
 360
 361 STATIC int
 362 linvfs_create(
 363         struct inode    *dir,
 364         struct dentry   *dentry,
 365         int             mode,
 366         struct nameidata *nd)
 367 {
 368         return linvfs_mknod(dir, dentry, mode, 0);
 369 }
 370
 371 STATIC int
 372 linvfs_mkdir(
 373         struct inode    *dir,
 374         struct dentry   *dentry,
 375         int             mode)
 376 {
 377         return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0);
 378 }
 379
 380 STATIC struct dentry *
 381 linvfs_lookup(
 382         struct inode    *dir,
 383         struct dentry   *dentry,
 384         struct nameidata *nd)
 385 {
 386         struct vnode    *vp = LINVFS_GET_VP(dir), *cvp;
 387         int             error;
 388
 389         if (dentry->d_name.len >= MAXNAMELEN)
 390                 return ERR_PTR(-ENAMETOOLONG);
 391
 392         VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error);
 393         if (error) {
 394                 if (unlikely(error != ENOENT))
 395                         return ERR_PTR(-error);
 396                 d_add(dentry, NULL);
 397                 return NULL;
 398         }
 399
 400         return d_splice_alias(LINVFS_GET_IP(cvp), dentry);
 401 }
 402
 403 STATIC int
 404 linvfs_link(
 405         struct dentry   *old_dentry,
 406         struct inode    *dir,
 407         struct dentry   *dentry)
 408 {
 409         struct inode    *ip;    /* inode of guy being linked to */
 410         vnode_t         *tdvp;  /* target directory for new name/link */
 411         vnode_t         *vp;    /* vp of name being linked */
 412         int             error;
 413
 414         ip = old_dentry->d_inode;       /* inode being linked to */
 415         if (S_ISDIR(ip->i_mode))
 416                 return -EPERM;
 417
 418         tdvp = LINVFS_GET_VP(dir);
 419         vp = LINVFS_GET_VP(ip);
 420
 421         VOP_LINK(tdvp, vp, dentry, NULL, error);
 422         if (!error) {
 423                 VMODIFY(tdvp);
 424                 VN_HOLD(vp);
 425                 validate_fields(ip);
 426                 d_instantiate(dentry, ip);
 427         }
 428         return -error;
 429 }
 430
 431 STATIC int
 432 linvfs_unlink(
 433         struct inode    *dir,
 434         struct dentry   *dentry)
 435 {
 436         struct inode    *inode;
 437         vnode_t         *dvp;   /* directory containing name to remove */
 438         int             error;
 439
 440         inode = dentry->d_inode;
 441         dvp = LINVFS_GET_VP(dir);
 442
 443         VOP_REMOVE(dvp, dentry, NULL, error);
 444         if (!error) {
 445                 validate_fields(dir);   /* For size only */
 446                 validate_fields(inode);
 447         }
 448
 449         return -error;
 450 }
 451
 452 STATIC int
 453 linvfs_symlink(
 454         struct inode    *dir,
 455         struct dentry   *dentry,
 456         const char      *symname)
 457 {
 458         struct inode    *ip;
 459         vattr_t         va;
 460         vnode_t         *dvp;   /* directory containing name of symlink */
 461         vnode_t         *cvp;   /* used to lookup symlink to put in dentry */
 462         int             error;
 463
 464         dvp = LINVFS_GET_VP(dir);
 465         cvp = NULL;
 466
 467         memset(&va, 0, sizeof(va));
 468         va.va_mode = S_IFLNK |
 469                 (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
 470         va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
 471
 472         error = 0;
 473         VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error);
 474         if (likely(!error && cvp)) {
 475                 error = linvfs_init_security(cvp, dir);
 476                 if (likely(!error)) {
 477                         ip = LINVFS_GET_IP(cvp);
 478                         d_instantiate(dentry, ip);
 479                         validate_fields(dir);
 480                         validate_fields(ip);
 481                 }
 482         }
 483         return -error;
 484 }
 485
 486 STATIC int
 487 linvfs_rmdir(
 488         struct inode    *dir,
 489         struct dentry   *dentry)
 490 {
 491         struct inode    *inode = dentry->d_inode;
 492         vnode_t         *dvp = LINVFS_GET_VP(dir);
 493         int             error;
 494
 495         VOP_RMDIR(dvp, dentry, NULL, error);
 496         if (!error) {
 497                 validate_fields(inode);
 498                 validate_fields(dir);
 499         }
 500         return -error;
 501 }
 502
 503 STATIC int
 504 linvfs_rename(
 505         struct inode    *odir,
 506         struct dentry   *odentry,
 507         struct inode    *ndir,
 508         struct dentry   *ndentry)
 509 {
 510         struct inode    *new_inode = ndentry->d_inode;
 511         vnode_t         *fvp;   /* from directory */
 512         vnode_t         *tvp;   /* target directory */
 513         int             error;
 514
 515         fvp = LINVFS_GET_VP(odir);
 516         tvp = LINVFS_GET_VP(ndir);
 517
 518         VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error);
 519         if (error)
 520                 return -error;
 521
 522         if (new_inode)
 523                 validate_fields(new_inode);
 524
 525         validate_fields(odir);
 526         if (ndir != odir)
 527                 validate_fields(ndir);
 528         return 0;
 529 }
 530
 531 /*
 532  * careful here - this function can get called recursively, so
 533  * we need to be very careful about how much stack we use.
 534  * uio is kmalloced for this reason...
 535  */
 536 STATIC void *
 537 linvfs_follow_link(
 538         struct dentry           *dentry,
 539         struct nameidata        *nd)
 540 {
 541         vnode_t                 *vp;
 542         uio_t                   *uio;
 543         iovec_t                 iov;
 544         int                     error;
 545         char                    *link;
 546
 547         ASSERT(dentry);
 548         ASSERT(nd);
 549
 550         link = (char *)kmalloc(MAXPATHLEN+1, GFP_KERNEL);
 551         if (!link) {
 552                 nd_set_link(nd, ERR_PTR(-ENOMEM));
 553                 return NULL;
 554         }
 555
 556         uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL);
 557         if (!uio) {
 558                 kfree(link);
 559                 nd_set_link(nd, ERR_PTR(-ENOMEM));
 560                 return NULL;
 561         }
 562
 563         vp = LINVFS_GET_VP(dentry->d_inode);
 564
 565         iov.iov_base = link;
 566         iov.iov_len = MAXPATHLEN;
 567
 568         uio->uio_iov = &iov;
 569         uio->uio_offset = 0;
 570         uio->uio_segflg = UIO_SYSSPACE;
 571         uio->uio_resid = MAXPATHLEN;
 572         uio->uio_iovcnt = 1;
 573
 574         VOP_READLINK(vp, uio, 0, NULL, error);
 575         if (error) {
 576                 kfree(link);
 577                 link = ERR_PTR(-error);
 578         } else {
 579                 link[MAXPATHLEN - uio->uio_resid] = '\0';
 580         }
 581         kfree(uio);
 582
 583         nd_set_link(nd, link);
 584         return NULL;
 585 }
 586
 587 STATIC void
 588 linvfs_put_link(
 589         struct dentry   *dentry,
 590         struct nameidata *nd,
 591         void            *p)
 592 {
 593         char            *s = nd_get_link(nd);
 594
 595         if (!IS_ERR(s))
 596                 kfree(s);
 597 }
 598
 599 #ifdef CONFIG_XFS_POSIX_ACL
 600 STATIC int
 601 linvfs_permission(
 602         struct inode    *inode,
 603         int             mode,
 604         struct nameidata *nd)
 605 {
 606         vnode_t         *vp = LINVFS_GET_VP(inode);
 607         int             error;
 608
 609         mode <<= 6;             /* convert from linux to vnode access bits */
 610         VOP_ACCESS(vp, mode, NULL, error);
 611         return -error;
 612 }
 613 #else
 614 #define linvfs_permission NULL
 615 #endif
 616
 617 STATIC int
 618 linvfs_getattr(
 619         struct vfsmount *mnt,
 620         struct dentry   *dentry,
 621         struct kstat    *stat)
 622 {
 623         struct inode    *inode = dentry->d_inode;
 624         vnode_t         *vp = LINVFS_GET_VP(inode);
 625         int             error = 0;
 626
 627         if (unlikely(vp->v_flag & VMODIFIED))
 628                 error = vn_revalidate(vp);
 629         if (!error)
 630                 generic_fillattr(inode, stat);
 631         return 0;
 632 }
 633
 634 STATIC int
 635 linvfs_setattr(
 636         struct dentry   *dentry,
 637         struct iattr    *attr)
 638 {
 639         struct inode    *inode = dentry->d_inode;
 640         unsigned int    ia_valid = attr->ia_valid;
 641         vnode_t         *vp = LINVFS_GET_VP(inode);
 642         vattr_t         vattr;
 643         int             flags = 0;
 644         int             error;
 645
 646         memset(&vattr, 0, sizeof(vattr_t));
 647         if (ia_valid & ATTR_UID) {
 648                 vattr.va_mask |= XFS_AT_UID;
 649                 vattr.va_uid = attr->ia_uid;
 650         }
 651         if (ia_valid & ATTR_GID) {
 652                 vattr.va_mask |= XFS_AT_GID;
 653                 vattr.va_gid = attr->ia_gid;
 654         }
 655         if (ia_valid & ATTR_SIZE) {
 656                 vattr.va_mask |= XFS_AT_SIZE;
 657                 vattr.va_size = attr->ia_size;
 658         }
 659         if (ia_valid & ATTR_ATIME) {
 660                 vattr.va_mask |= XFS_AT_ATIME;
 661                 vattr.va_atime = attr->ia_atime;
 662         }
 663         if (ia_valid & ATTR_MTIME) {
 664                 vattr.va_mask |= XFS_AT_MTIME;
 665                 vattr.va_mtime = attr->ia_mtime;
 666         }
 667         if (ia_valid & ATTR_CTIME) {
 668                 vattr.va_mask |= XFS_AT_CTIME;
 669                 vattr.va_ctime = attr->ia_ctime;
 670         }
 671         if (ia_valid & ATTR_MODE) {
 672                 vattr.va_mask |= XFS_AT_MODE;
 673                 vattr.va_mode = attr->ia_mode;
 674                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 675                         inode->i_mode &= ~S_ISGID;
 676         }
 677
 678         if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
 679                 flags |= ATTR_UTIME;
 680 #ifdef ATTR_NO_BLOCK
 681         if ((ia_valid & ATTR_NO_BLOCK))
 682                 flags |= ATTR_NONBLOCK;
 683 #endif
 684
 685         VOP_SETATTR(vp, &vattr, flags, NULL, error);
 686         if (error)
 687                 return -error;
 688         vn_revalidate(vp);
 689         return error;
 690 }
 691
 692 STATIC void
 693 linvfs_truncate(
 694         struct inode    *inode)
 695 {
 696         block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block);
 697 }
 698
 699 STATIC int
 700 linvfs_setxattr(
 701         struct dentry   *dentry,
 702         const char      *name,
 703         const void      *data,
 704         size_t          size,
 705         int             flags)
 706 {
 707         vnode_t         *vp = LINVFS_GET_VP(dentry->d_inode);
 708         char            *attr = (char *)name;
 709         attrnames_t     *namesp;
 710         int             xflags = 0;
 711         int             error;
 712
 713         namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 714         if (!namesp)
 715                 return -EOPNOTSUPP;
 716         attr += namesp->attr_namelen;
 717         error = namesp->attr_capable(vp, NULL);
 718         if (error)
 719                 return error;
 720
 721         /* Convert Linux syscall to XFS internal ATTR flags */
 722         if (flags & XATTR_CREATE)
 723                 xflags |= ATTR_CREATE;
 724         if (flags & XATTR_REPLACE)
 725                 xflags |= ATTR_REPLACE;
 726         xflags |= namesp->attr_flag;
 727         return namesp->attr_set(vp, attr, (void *)data, size, xflags);
 728 }
 729
 730 STATIC ssize_t
 731 linvfs_getxattr(
 732         struct dentry   *dentry,
 733         const char      *name,
 734         void            *data,
 735         size_t          size)
 736 {
 737         vnode_t         *vp = LINVFS_GET_VP(dentry->d_inode);
 738         char            *attr = (char *)name;
 739         attrnames_t     *namesp;
 740         int             xflags = 0;
 741         ssize_t         error;
 742
 743         namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 744         if (!namesp)
 745                 return -EOPNOTSUPP;
 746         attr += namesp->attr_namelen;
 747         error = namesp->attr_capable(vp, NULL);
 748         if (error)
 749                 return error;
 750
 751         /* Convert Linux syscall to XFS internal ATTR flags */
 752         if (!size) {
 753                 xflags |= ATTR_KERNOVAL;
 754                 data = NULL;
 755         }
 756         xflags |= namesp->attr_flag;
 757         return namesp->attr_get(vp, attr, (void *)data, size, xflags);
 758 }
 759
 760 STATIC ssize_t
 761 linvfs_listxattr(
 762         struct dentry           *dentry,
 763         char                    *data,
 764         size_t                  size)
 765 {
 766         vnode_t                 *vp = LINVFS_GET_VP(dentry->d_inode);
 767         int                     error, xflags = ATTR_KERNAMELS;
 768         ssize_t                 result;
 769
 770         if (!size)
 771                 xflags |= ATTR_KERNOVAL;
 772         xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
 773
 774         error = attr_generic_list(vp, data, size, xflags, &result);
 775         if (error < 0)
 776                 return error;
 777         return result;
 778 }
 779
 780 STATIC int
 781 linvfs_removexattr(
 782         struct dentry   *dentry,
 783         const char      *name)
 784 {
 785         vnode_t         *vp = LINVFS_GET_VP(dentry->d_inode);
 786         char            *attr = (char *)name;
 787         attrnames_t     *namesp;
 788         int             xflags = 0;
 789         int             error;
 790
 791         namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 792         if (!namesp)
 793                 return -EOPNOTSUPP;
 794         attr += namesp->attr_namelen;
 795         error = namesp->attr_capable(vp, NULL);
 796         if (error)
 797                 return error;
 798         xflags |= namesp->attr_flag;
 799         return namesp->attr_remove(vp, attr, xflags);
 800 }
 801
 802
 803 struct inode_operations linvfs_file_inode_operations = {
 804         .permission             = linvfs_permission,
 805         .truncate               = linvfs_truncate,
 806         .getattr                = linvfs_getattr,
 807         .setattr                = linvfs_setattr,
 808         .setxattr               = linvfs_setxattr,
 809         .getxattr               = linvfs_getxattr,
 810         .listxattr              = linvfs_listxattr,
 811         .removexattr            = linvfs_removexattr,
 812 };
 813
 814 struct inode_operations linvfs_dir_inode_operations = {
 815         .create                 = linvfs_create,
 816         .lookup                 = linvfs_lookup,
 817         .link                   = linvfs_link,
 818         .unlink                 = linvfs_unlink,
 819         .symlink                = linvfs_symlink,
 820         .mkdir                  = linvfs_mkdir,
 821         .rmdir                  = linvfs_rmdir,
 822         .mknod                  = linvfs_mknod,
 823         .rename                 = linvfs_rename,
 824         .permission             = linvfs_permission,
 825         .getattr                = linvfs_getattr,
 826         .setattr                = linvfs_setattr,
 827         .setxattr               = linvfs_setxattr,
 828         .getxattr               = linvfs_getxattr,
 829         .listxattr              = linvfs_listxattr,
 830         .removexattr            = linvfs_removexattr,
 831 };
 832
 833 struct inode_operations linvfs_symlink_inode_operations = {
 834         .readlink               = generic_readlink,
 835         .follow_link            = linvfs_follow_link,
 836         .put_link               = linvfs_put_link,
 837         .permission             = linvfs_permission,
 838         .getattr                = linvfs_getattr,
 839         .setattr                = linvfs_setattr,
 840         .setxattr               = linvfs_setxattr,
 841         .getxattr               = linvfs_getxattr,
 842         .listxattr              = linvfs_listxattr,
 843         .removexattr            = linvfs_removexattr,
 844 };