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_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_mount.h" 25 #include "xfs_da_format.h" 26 #include "xfs_inode.h" 27 #include "xfs_bmap.h" 28 #include "xfs_bmap_util.h" 29 #include "xfs_acl.h" 30 #include "xfs_quota.h" 31 #include "xfs_error.h" 32 #include "xfs_attr.h" 33 #include "xfs_trans.h" 34 #include "xfs_trace.h" 35 #include "xfs_icache.h" 36 #include "xfs_symlink.h" 37 #include "xfs_da_btree.h" 38 #include "xfs_dir2.h" 39 #include "xfs_trans_space.h" 40 #include "xfs_pnfs.h" 41 42 #include <linux/capability.h> 43 #include <linux/xattr.h> 44 #include <linux/namei.h> 45 #include <linux/posix_acl.h> 46 #include <linux/security.h> 47 #include <linux/fiemap.h> 48 #include <linux/slab.h> 49 50 /* 51 * Directories have different lock order w.r.t. mmap_sem compared to regular 52 * files. This is due to readdir potentially triggering page faults on a user 53 * buffer inside filldir(), and this happens with the ilock on the directory 54 * held. For regular files, the lock order is the other way around - the 55 * mmap_sem is taken during the page fault, and then we lock the ilock to do 56 * block mapping. Hence we need a different class for the directory ilock so 57 * that lockdep can tell them apart. 58 */ 59 static struct lock_class_key xfs_nondir_ilock_class; 60 static struct lock_class_key xfs_dir_ilock_class; 61 62 static int 63 xfs_initxattrs( 64 struct inode *inode, 65 const struct xattr *xattr_array, 66 void *fs_info) 67 { 68 const struct xattr *xattr; 69 struct xfs_inode *ip = XFS_I(inode); 70 int error = 0; 71 72 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 73 error = xfs_attr_set(ip, xattr->name, xattr->value, 74 xattr->value_len, ATTR_SECURE); 75 if (error < 0) 76 break; 77 } 78 return error; 79 } 80 81 /* 82 * Hook in SELinux. This is not quite correct yet, what we really need 83 * here (as we do for default ACLs) is a mechanism by which creation of 84 * these attrs can be journalled at inode creation time (along with the 85 * inode, of course, such that log replay can't cause these to be lost). 86 */ 87 88 STATIC int 89 xfs_init_security( 90 struct inode *inode, 91 struct inode *dir, 92 const struct qstr *qstr) 93 { 94 return security_inode_init_security(inode, dir, qstr, 95 &xfs_initxattrs, NULL); 96 } 97 98 static void 99 xfs_dentry_to_name( 100 struct xfs_name *namep, 101 struct dentry *dentry, 102 int mode) 103 { 104 namep->name = dentry->d_name.name; 105 namep->len = dentry->d_name.len; 106 namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT]; 107 } 108 109 STATIC void 110 xfs_cleanup_inode( 111 struct inode *dir, 112 struct inode *inode, 113 struct dentry *dentry) 114 { 115 struct xfs_name teardown; 116 117 /* Oh, the horror. 118 * If we can't add the ACL or we fail in 119 * xfs_init_security we must back out. 120 * ENOSPC can hit here, among other things. 121 */ 122 xfs_dentry_to_name(&teardown, dentry, 0); 123 124 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); 125 } 126 127 STATIC int 128 xfs_generic_create( 129 struct inode *dir, 130 struct dentry *dentry, 131 umode_t mode, 132 dev_t rdev, 133 bool tmpfile) /* unnamed file */ 134 { 135 struct inode *inode; 136 struct xfs_inode *ip = NULL; 137 struct posix_acl *default_acl, *acl; 138 struct xfs_name name; 139 int error; 140 141 /* 142 * Irix uses Missed'em'V split, but doesn't want to see 143 * the upper 5 bits of (14bit) major. 144 */ 145 if (S_ISCHR(mode) || S_ISBLK(mode)) { 146 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) 147 return -EINVAL; 148 rdev = sysv_encode_dev(rdev); 149 } else { 150 rdev = 0; 151 } 152 153 error = posix_acl_create(dir, &mode, &default_acl, &acl); 154 if (error) 155 return error; 156 157 if (!tmpfile) { 158 xfs_dentry_to_name(&name, dentry, mode); 159 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); 160 } else { 161 error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); 162 } 163 if (unlikely(error)) 164 goto out_free_acl; 165 166 inode = VFS_I(ip); 167 168 error = xfs_init_security(inode, dir, &dentry->d_name); 169 if (unlikely(error)) 170 goto out_cleanup_inode; 171 172 #ifdef CONFIG_XFS_POSIX_ACL 173 if (default_acl) { 174 error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 175 if (error) 176 goto out_cleanup_inode; 177 } 178 if (acl) { 179 error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); 180 if (error) 181 goto out_cleanup_inode; 182 } 183 #endif 184 185 if (tmpfile) 186 d_tmpfile(dentry, inode); 187 else 188 d_instantiate(dentry, inode); 189 190 out_free_acl: 191 if (default_acl) 192 posix_acl_release(default_acl); 193 if (acl) 194 posix_acl_release(acl); 195 return error; 196 197 out_cleanup_inode: 198 if (!tmpfile) 199 xfs_cleanup_inode(dir, inode, dentry); 200 iput(inode); 201 goto out_free_acl; 202 } 203 204 STATIC int 205 xfs_vn_mknod( 206 struct inode *dir, 207 struct dentry *dentry, 208 umode_t mode, 209 dev_t rdev) 210 { 211 return xfs_generic_create(dir, dentry, mode, rdev, false); 212 } 213 214 STATIC int 215 xfs_vn_create( 216 struct inode *dir, 217 struct dentry *dentry, 218 umode_t mode, 219 bool flags) 220 { 221 return xfs_vn_mknod(dir, dentry, mode, 0); 222 } 223 224 STATIC int 225 xfs_vn_mkdir( 226 struct inode *dir, 227 struct dentry *dentry, 228 umode_t mode) 229 { 230 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); 231 } 232 233 STATIC struct dentry * 234 xfs_vn_lookup( 235 struct inode *dir, 236 struct dentry *dentry, 237 unsigned int flags) 238 { 239 struct xfs_inode *cip; 240 struct xfs_name name; 241 int error; 242 243 if (dentry->d_name.len >= MAXNAMELEN) 244 return ERR_PTR(-ENAMETOOLONG); 245 246 xfs_dentry_to_name(&name, dentry, 0); 247 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); 248 if (unlikely(error)) { 249 if (unlikely(error != -ENOENT)) 250 return ERR_PTR(error); 251 d_add(dentry, NULL); 252 return NULL; 253 } 254 255 return d_splice_alias(VFS_I(cip), dentry); 256 } 257 258 STATIC struct dentry * 259 xfs_vn_ci_lookup( 260 struct inode *dir, 261 struct dentry *dentry, 262 unsigned int flags) 263 { 264 struct xfs_inode *ip; 265 struct xfs_name xname; 266 struct xfs_name ci_name; 267 struct qstr dname; 268 int error; 269 270 if (dentry->d_name.len >= MAXNAMELEN) 271 return ERR_PTR(-ENAMETOOLONG); 272 273 xfs_dentry_to_name(&xname, dentry, 0); 274 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); 275 if (unlikely(error)) { 276 if (unlikely(error != -ENOENT)) 277 return ERR_PTR(error); 278 /* 279 * call d_add(dentry, NULL) here when d_drop_negative_children 280 * is called in xfs_vn_mknod (ie. allow negative dentries 281 * with CI filesystems). 282 */ 283 return NULL; 284 } 285 286 /* if exact match, just splice and exit */ 287 if (!ci_name.name) 288 return d_splice_alias(VFS_I(ip), dentry); 289 290 /* else case-insensitive match... */ 291 dname.name = ci_name.name; 292 dname.len = ci_name.len; 293 dentry = d_add_ci(dentry, VFS_I(ip), &dname); 294 kmem_free(ci_name.name); 295 return dentry; 296 } 297 298 STATIC int 299 xfs_vn_link( 300 struct dentry *old_dentry, 301 struct inode *dir, 302 struct dentry *dentry) 303 { 304 struct inode *inode = old_dentry->d_inode; 305 struct xfs_name name; 306 int error; 307 308 xfs_dentry_to_name(&name, dentry, inode->i_mode); 309 310 error = xfs_link(XFS_I(dir), XFS_I(inode), &name); 311 if (unlikely(error)) 312 return error; 313 314 ihold(inode); 315 d_instantiate(dentry, inode); 316 return 0; 317 } 318 319 STATIC int 320 xfs_vn_unlink( 321 struct inode *dir, 322 struct dentry *dentry) 323 { 324 struct xfs_name name; 325 int error; 326 327 xfs_dentry_to_name(&name, dentry, 0); 328 329 error = xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); 330 if (error) 331 return error; 332 333 /* 334 * With unlink, the VFS makes the dentry "negative": no inode, 335 * but still hashed. This is incompatible with case-insensitive 336 * mode, so invalidate (unhash) the dentry in CI-mode. 337 */ 338 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) 339 d_invalidate(dentry); 340 return 0; 341 } 342 343 STATIC int 344 xfs_vn_symlink( 345 struct inode *dir, 346 struct dentry *dentry, 347 const char *symname) 348 { 349 struct inode *inode; 350 struct xfs_inode *cip = NULL; 351 struct xfs_name name; 352 int error; 353 umode_t mode; 354 355 mode = S_IFLNK | 356 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); 357 xfs_dentry_to_name(&name, dentry, mode); 358 359 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); 360 if (unlikely(error)) 361 goto out; 362 363 inode = VFS_I(cip); 364 365 error = xfs_init_security(inode, dir, &dentry->d_name); 366 if (unlikely(error)) 367 goto out_cleanup_inode; 368 369 d_instantiate(dentry, inode); 370 return 0; 371 372 out_cleanup_inode: 373 xfs_cleanup_inode(dir, inode, dentry); 374 iput(inode); 375 out: 376 return error; 377 } 378 379 STATIC int 380 xfs_vn_rename( 381 struct inode *odir, 382 struct dentry *odentry, 383 struct inode *ndir, 384 struct dentry *ndentry, 385 unsigned int flags) 386 { 387 struct inode *new_inode = ndentry->d_inode; 388 int omode = 0; 389 struct xfs_name oname; 390 struct xfs_name nname; 391 392 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) 393 return -EINVAL; 394 395 /* if we are exchanging files, we need to set i_mode of both files */ 396 if (flags & RENAME_EXCHANGE) 397 omode = ndentry->d_inode->i_mode; 398 399 xfs_dentry_to_name(&oname, odentry, omode); 400 xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode); 401 402 return xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), 403 XFS_I(ndir), &nname, 404 new_inode ? XFS_I(new_inode) : NULL, flags); 405 } 406 407 /* 408 * careful here - this function can get called recursively, so 409 * we need to be very careful about how much stack we use. 410 * uio is kmalloced for this reason... 411 */ 412 STATIC void * 413 xfs_vn_follow_link( 414 struct dentry *dentry, 415 struct nameidata *nd) 416 { 417 char *link; 418 int error = -ENOMEM; 419 420 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); 421 if (!link) 422 goto out_err; 423 424 error = xfs_readlink(XFS_I(dentry->d_inode), link); 425 if (unlikely(error)) 426 goto out_kfree; 427 428 nd_set_link(nd, link); 429 return NULL; 430 431 out_kfree: 432 kfree(link); 433 out_err: 434 nd_set_link(nd, ERR_PTR(error)); 435 return NULL; 436 } 437 438 STATIC int 439 xfs_vn_getattr( 440 struct vfsmount *mnt, 441 struct dentry *dentry, 442 struct kstat *stat) 443 { 444 struct inode *inode = dentry->d_inode; 445 struct xfs_inode *ip = XFS_I(inode); 446 struct xfs_mount *mp = ip->i_mount; 447 448 trace_xfs_getattr(ip); 449 450 if (XFS_FORCED_SHUTDOWN(mp)) 451 return -EIO; 452 453 stat->size = XFS_ISIZE(ip); 454 stat->dev = inode->i_sb->s_dev; 455 stat->mode = ip->i_d.di_mode; 456 stat->nlink = ip->i_d.di_nlink; 457 stat->uid = inode->i_uid; 458 stat->gid = inode->i_gid; 459 stat->ino = ip->i_ino; 460 stat->atime = inode->i_atime; 461 stat->mtime = inode->i_mtime; 462 stat->ctime = inode->i_ctime; 463 stat->blocks = 464 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); 465 466 467 switch (inode->i_mode & S_IFMT) { 468 case S_IFBLK: 469 case S_IFCHR: 470 stat->blksize = BLKDEV_IOSIZE; 471 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, 472 sysv_minor(ip->i_df.if_u2.if_rdev)); 473 break; 474 default: 475 if (XFS_IS_REALTIME_INODE(ip)) { 476 /* 477 * If the file blocks are being allocated from a 478 * realtime volume, then return the inode's realtime 479 * extent size or the realtime volume's extent size. 480 */ 481 stat->blksize = 482 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; 483 } else 484 stat->blksize = xfs_preferred_iosize(mp); 485 stat->rdev = 0; 486 break; 487 } 488 489 return 0; 490 } 491 492 static void 493 xfs_setattr_mode( 494 struct xfs_inode *ip, 495 struct iattr *iattr) 496 { 497 struct inode *inode = VFS_I(ip); 498 umode_t mode = iattr->ia_mode; 499 500 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 501 502 ip->i_d.di_mode &= S_IFMT; 503 ip->i_d.di_mode |= mode & ~S_IFMT; 504 505 inode->i_mode &= S_IFMT; 506 inode->i_mode |= mode & ~S_IFMT; 507 } 508 509 void 510 xfs_setattr_time( 511 struct xfs_inode *ip, 512 struct iattr *iattr) 513 { 514 struct inode *inode = VFS_I(ip); 515 516 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 517 518 if (iattr->ia_valid & ATTR_ATIME) { 519 inode->i_atime = iattr->ia_atime; 520 ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; 521 ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; 522 } 523 if (iattr->ia_valid & ATTR_CTIME) { 524 inode->i_ctime = iattr->ia_ctime; 525 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; 526 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; 527 } 528 if (iattr->ia_valid & ATTR_MTIME) { 529 inode->i_mtime = iattr->ia_mtime; 530 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; 531 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; 532 } 533 } 534 535 int 536 xfs_setattr_nonsize( 537 struct xfs_inode *ip, 538 struct iattr *iattr, 539 int flags) 540 { 541 xfs_mount_t *mp = ip->i_mount; 542 struct inode *inode = VFS_I(ip); 543 int mask = iattr->ia_valid; 544 xfs_trans_t *tp; 545 int error; 546 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; 547 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; 548 struct xfs_dquot *udqp = NULL, *gdqp = NULL; 549 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; 550 551 trace_xfs_setattr(ip); 552 553 /* If acls are being inherited, we already have this checked */ 554 if (!(flags & XFS_ATTR_NOACL)) { 555 if (mp->m_flags & XFS_MOUNT_RDONLY) 556 return -EROFS; 557 558 if (XFS_FORCED_SHUTDOWN(mp)) 559 return -EIO; 560 561 error = inode_change_ok(inode, iattr); 562 if (error) 563 return error; 564 } 565 566 ASSERT((mask & ATTR_SIZE) == 0); 567 568 /* 569 * If disk quotas is on, we make sure that the dquots do exist on disk, 570 * before we start any other transactions. Trying to do this later 571 * is messy. We don't care to take a readlock to look at the ids 572 * in inode here, because we can't hold it across the trans_reserve. 573 * If the IDs do change before we take the ilock, we're covered 574 * because the i_*dquot fields will get updated anyway. 575 */ 576 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { 577 uint qflags = 0; 578 579 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { 580 uid = iattr->ia_uid; 581 qflags |= XFS_QMOPT_UQUOTA; 582 } else { 583 uid = inode->i_uid; 584 } 585 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { 586 gid = iattr->ia_gid; 587 qflags |= XFS_QMOPT_GQUOTA; 588 } else { 589 gid = inode->i_gid; 590 } 591 592 /* 593 * We take a reference when we initialize udqp and gdqp, 594 * so it is important that we never blindly double trip on 595 * the same variable. See xfs_create() for an example. 596 */ 597 ASSERT(udqp == NULL); 598 ASSERT(gdqp == NULL); 599 error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), 600 xfs_kgid_to_gid(gid), 601 xfs_get_projid(ip), 602 qflags, &udqp, &gdqp, NULL); 603 if (error) 604 return error; 605 } 606 607 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 608 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 609 if (error) 610 goto out_dqrele; 611 612 xfs_ilock(ip, XFS_ILOCK_EXCL); 613 614 /* 615 * Change file ownership. Must be the owner or privileged. 616 */ 617 if (mask & (ATTR_UID|ATTR_GID)) { 618 /* 619 * These IDs could have changed since we last looked at them. 620 * But, we're assured that if the ownership did change 621 * while we didn't have the inode locked, inode's dquot(s) 622 * would have changed also. 623 */ 624 iuid = inode->i_uid; 625 igid = inode->i_gid; 626 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; 627 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; 628 629 /* 630 * Do a quota reservation only if uid/gid is actually 631 * going to change. 632 */ 633 if (XFS_IS_QUOTA_RUNNING(mp) && 634 ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || 635 (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { 636 ASSERT(tp); 637 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, 638 NULL, capable(CAP_FOWNER) ? 639 XFS_QMOPT_FORCE_RES : 0); 640 if (error) /* out of quota */ 641 goto out_trans_cancel; 642 } 643 } 644 645 xfs_trans_ijoin(tp, ip, 0); 646 647 /* 648 * Change file ownership. Must be the owner or privileged. 649 */ 650 if (mask & (ATTR_UID|ATTR_GID)) { 651 /* 652 * CAP_FSETID overrides the following restrictions: 653 * 654 * The set-user-ID and set-group-ID bits of a file will be 655 * cleared upon successful return from chown() 656 */ 657 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 658 !capable(CAP_FSETID)) 659 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 660 661 /* 662 * Change the ownerships and register quota modifications 663 * in the transaction. 664 */ 665 if (!uid_eq(iuid, uid)) { 666 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { 667 ASSERT(mask & ATTR_UID); 668 ASSERT(udqp); 669 olddquot1 = xfs_qm_vop_chown(tp, ip, 670 &ip->i_udquot, udqp); 671 } 672 ip->i_d.di_uid = xfs_kuid_to_uid(uid); 673 inode->i_uid = uid; 674 } 675 if (!gid_eq(igid, gid)) { 676 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { 677 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || 678 !XFS_IS_PQUOTA_ON(mp)); 679 ASSERT(mask & ATTR_GID); 680 ASSERT(gdqp); 681 olddquot2 = xfs_qm_vop_chown(tp, ip, 682 &ip->i_gdquot, gdqp); 683 } 684 ip->i_d.di_gid = xfs_kgid_to_gid(gid); 685 inode->i_gid = gid; 686 } 687 } 688 689 if (mask & ATTR_MODE) 690 xfs_setattr_mode(ip, iattr); 691 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) 692 xfs_setattr_time(ip, iattr); 693 694 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 695 696 XFS_STATS_INC(xs_ig_attrchg); 697 698 if (mp->m_flags & XFS_MOUNT_WSYNC) 699 xfs_trans_set_sync(tp); 700 error = xfs_trans_commit(tp, 0); 701 702 xfs_iunlock(ip, XFS_ILOCK_EXCL); 703 704 /* 705 * Release any dquot(s) the inode had kept before chown. 706 */ 707 xfs_qm_dqrele(olddquot1); 708 xfs_qm_dqrele(olddquot2); 709 xfs_qm_dqrele(udqp); 710 xfs_qm_dqrele(gdqp); 711 712 if (error) 713 return error; 714 715 /* 716 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode 717 * update. We could avoid this with linked transactions 718 * and passing down the transaction pointer all the way 719 * to attr_set. No previous user of the generic 720 * Posix ACL code seems to care about this issue either. 721 */ 722 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { 723 error = posix_acl_chmod(inode, inode->i_mode); 724 if (error) 725 return error; 726 } 727 728 return 0; 729 730 out_trans_cancel: 731 xfs_trans_cancel(tp, 0); 732 xfs_iunlock(ip, XFS_ILOCK_EXCL); 733 out_dqrele: 734 xfs_qm_dqrele(udqp); 735 xfs_qm_dqrele(gdqp); 736 return error; 737 } 738 739 /* 740 * Truncate file. Must have write permission and not be a directory. 741 */ 742 int 743 xfs_setattr_size( 744 struct xfs_inode *ip, 745 struct iattr *iattr) 746 { 747 struct xfs_mount *mp = ip->i_mount; 748 struct inode *inode = VFS_I(ip); 749 xfs_off_t oldsize, newsize; 750 struct xfs_trans *tp; 751 int error; 752 uint lock_flags = 0; 753 uint commit_flags = 0; 754 755 trace_xfs_setattr(ip); 756 757 if (mp->m_flags & XFS_MOUNT_RDONLY) 758 return -EROFS; 759 760 if (XFS_FORCED_SHUTDOWN(mp)) 761 return -EIO; 762 763 error = inode_change_ok(inode, iattr); 764 if (error) 765 return error; 766 767 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 768 ASSERT(S_ISREG(ip->i_d.di_mode)); 769 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| 770 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); 771 772 oldsize = inode->i_size; 773 newsize = iattr->ia_size; 774 775 /* 776 * Short circuit the truncate case for zero length files. 777 */ 778 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { 779 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) 780 return 0; 781 782 /* 783 * Use the regular setattr path to update the timestamps. 784 */ 785 iattr->ia_valid &= ~ATTR_SIZE; 786 return xfs_setattr_nonsize(ip, iattr, 0); 787 } 788 789 /* 790 * Make sure that the dquots are attached to the inode. 791 */ 792 error = xfs_qm_dqattach(ip, 0); 793 if (error) 794 return error; 795 796 /* 797 * Now we can make the changes. Before we join the inode to the 798 * transaction, take care of the part of the truncation that must be 799 * done without the inode lock. This needs to be done before joining 800 * the inode to the transaction, because the inode cannot be unlocked 801 * once it is a part of the transaction. 802 */ 803 if (newsize > oldsize) { 804 /* 805 * Do the first part of growing a file: zero any data in the 806 * last block that is beyond the old EOF. We need to do this 807 * before the inode is joined to the transaction to modify 808 * i_size. 809 */ 810 error = xfs_zero_eof(ip, newsize, oldsize); 811 if (error) 812 return error; 813 } 814 815 /* 816 * We are going to log the inode size change in this transaction so 817 * any previous writes that are beyond the on disk EOF and the new 818 * EOF that have not been written out need to be written here. If we 819 * do not write the data out, we expose ourselves to the null files 820 * problem. 821 * 822 * Only flush from the on disk size to the smaller of the in memory 823 * file size or the new size as that's the range we really care about 824 * here and prevents waiting for other data not within the range we 825 * care about here. 826 */ 827 if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) { 828 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, 829 ip->i_d.di_size, newsize); 830 if (error) 831 return error; 832 } 833 834 /* 835 * Wait for all direct I/O to complete. 836 */ 837 inode_dio_wait(inode); 838 839 /* 840 * Do all the page cache truncate work outside the transaction context 841 * as the "lock" order is page lock->log space reservation. i.e. 842 * locking pages inside the transaction can ABBA deadlock with 843 * writeback. We have to do the VFS inode size update before we truncate 844 * the pagecache, however, to avoid racing with page faults beyond the 845 * new EOF they are not serialised against truncate operations except by 846 * page locks and size updates. 847 * 848 * Hence we are in a situation where a truncate can fail with ENOMEM 849 * from xfs_trans_reserve(), but having already truncated the in-memory 850 * version of the file (i.e. made user visible changes). There's not 851 * much we can do about this, except to hope that the caller sees ENOMEM 852 * and retries the truncate operation. 853 */ 854 error = block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks); 855 if (error) 856 return error; 857 truncate_setsize(inode, newsize); 858 859 /* 860 * The "we can't serialise against page faults" pain gets worse. 861 * 862 * If the file is mapped then we have to clean the page at the old EOF 863 * when extending the file. Extending the file can expose changes the 864 * underlying page mapping (e.g. from beyond EOF to a hole or 865 * unwritten), and so on the next attempt to write to that page we need 866 * to remap it for write. i.e. we need .page_mkwrite() to be called. 867 * Hence we need to clean the page to clean the pte and so a new write 868 * fault will be triggered appropriately. 869 * 870 * If we do it before we change the inode size, then we can race with a 871 * page fault that maps the page with exactly the same problem. If we do 872 * it after we change the file size, then a new page fault can come in 873 * and allocate space before we've run the rest of the truncate 874 * transaction. That's kinda grotesque, but it's better than have data 875 * over a hole, and so that's the lesser evil that has been chosen here. 876 * 877 * The real solution, however, is to have some mechanism for locking out 878 * page faults while a truncate is in progress. 879 */ 880 if (newsize > oldsize && mapping_mapped(VFS_I(ip)->i_mapping)) { 881 error = filemap_write_and_wait_range( 882 VFS_I(ip)->i_mapping, 883 round_down(oldsize, PAGE_CACHE_SIZE), 884 round_up(oldsize, PAGE_CACHE_SIZE) - 1); 885 if (error) 886 return error; 887 } 888 889 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); 890 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); 891 if (error) 892 goto out_trans_cancel; 893 894 commit_flags = XFS_TRANS_RELEASE_LOG_RES; 895 lock_flags |= XFS_ILOCK_EXCL; 896 xfs_ilock(ip, XFS_ILOCK_EXCL); 897 xfs_trans_ijoin(tp, ip, 0); 898 899 /* 900 * Only change the c/mtime if we are changing the size or we are 901 * explicitly asked to change it. This handles the semantic difference 902 * between truncate() and ftruncate() as implemented in the VFS. 903 * 904 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a 905 * special case where we need to update the times despite not having 906 * these flags set. For all other operations the VFS set these flags 907 * explicitly if it wants a timestamp update. 908 */ 909 if (newsize != oldsize && 910 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { 911 iattr->ia_ctime = iattr->ia_mtime = 912 current_fs_time(inode->i_sb); 913 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 914 } 915 916 /* 917 * The first thing we do is set the size to new_size permanently on 918 * disk. This way we don't have to worry about anyone ever being able 919 * to look at the data being freed even in the face of a crash. 920 * What we're getting around here is the case where we free a block, it 921 * is allocated to another file, it is written to, and then we crash. 922 * If the new data gets written to the file but the log buffers 923 * containing the free and reallocation don't, then we'd end up with 924 * garbage in the blocks being freed. As long as we make the new size 925 * permanent before actually freeing any blocks it doesn't matter if 926 * they get written to. 927 */ 928 ip->i_d.di_size = newsize; 929 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 930 931 if (newsize <= oldsize) { 932 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); 933 if (error) 934 goto out_trans_abort; 935 936 /* 937 * Truncated "down", so we're removing references to old data 938 * here - if we delay flushing for a long time, we expose 939 * ourselves unduly to the notorious NULL files problem. So, 940 * we mark this inode and flush it when the file is closed, 941 * and do not wait the usual (long) time for writeout. 942 */ 943 xfs_iflags_set(ip, XFS_ITRUNCATED); 944 945 /* A truncate down always removes post-EOF blocks. */ 946 xfs_inode_clear_eofblocks_tag(ip); 947 } 948 949 if (iattr->ia_valid & ATTR_MODE) 950 xfs_setattr_mode(ip, iattr); 951 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) 952 xfs_setattr_time(ip, iattr); 953 954 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 955 956 XFS_STATS_INC(xs_ig_attrchg); 957 958 if (mp->m_flags & XFS_MOUNT_WSYNC) 959 xfs_trans_set_sync(tp); 960 961 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); 962 out_unlock: 963 if (lock_flags) 964 xfs_iunlock(ip, lock_flags); 965 return error; 966 967 out_trans_abort: 968 commit_flags |= XFS_TRANS_ABORT; 969 out_trans_cancel: 970 xfs_trans_cancel(tp, commit_flags); 971 goto out_unlock; 972 } 973 974 STATIC int 975 xfs_vn_setattr( 976 struct dentry *dentry, 977 struct iattr *iattr) 978 { 979 struct xfs_inode *ip = XFS_I(dentry->d_inode); 980 int error; 981 982 if (iattr->ia_valid & ATTR_SIZE) { 983 uint iolock = XFS_IOLOCK_EXCL; 984 985 xfs_ilock(ip, iolock); 986 error = xfs_break_layouts(dentry->d_inode, &iolock); 987 if (!error) 988 error = xfs_setattr_size(ip, iattr); 989 xfs_iunlock(ip, iolock); 990 } else { 991 error = xfs_setattr_nonsize(ip, iattr, 0); 992 } 993 994 return error; 995 } 996 997 STATIC int 998 xfs_vn_update_time( 999 struct inode *inode, 1000 struct timespec *now, 1001 int flags) 1002 { 1003 struct xfs_inode *ip = XFS_I(inode); 1004 struct xfs_mount *mp = ip->i_mount; 1005 struct xfs_trans *tp; 1006 int error; 1007 1008 trace_xfs_update_time(ip); 1009 1010 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS); 1011 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0); 1012 if (error) { 1013 xfs_trans_cancel(tp, 0); 1014 return error; 1015 } 1016 1017 xfs_ilock(ip, XFS_ILOCK_EXCL); 1018 if (flags & S_CTIME) { 1019 inode->i_ctime = *now; 1020 ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec; 1021 ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec; 1022 } 1023 if (flags & S_MTIME) { 1024 inode->i_mtime = *now; 1025 ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec; 1026 ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec; 1027 } 1028 if (flags & S_ATIME) { 1029 inode->i_atime = *now; 1030 ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec; 1031 ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec; 1032 } 1033 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 1034 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); 1035 return xfs_trans_commit(tp, 0); 1036 } 1037 1038 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) 1039 1040 /* 1041 * Call fiemap helper to fill in user data. 1042 * Returns positive errors to xfs_getbmap. 1043 */ 1044 STATIC int 1045 xfs_fiemap_format( 1046 void **arg, 1047 struct getbmapx *bmv, 1048 int *full) 1049 { 1050 int error; 1051 struct fiemap_extent_info *fieinfo = *arg; 1052 u32 fiemap_flags = 0; 1053 u64 logical, physical, length; 1054 1055 /* Do nothing for a hole */ 1056 if (bmv->bmv_block == -1LL) 1057 return 0; 1058 1059 logical = BBTOB(bmv->bmv_offset); 1060 physical = BBTOB(bmv->bmv_block); 1061 length = BBTOB(bmv->bmv_length); 1062 1063 if (bmv->bmv_oflags & BMV_OF_PREALLOC) 1064 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; 1065 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { 1066 fiemap_flags |= (FIEMAP_EXTENT_DELALLOC | 1067 FIEMAP_EXTENT_UNKNOWN); 1068 physical = 0; /* no block yet */ 1069 } 1070 if (bmv->bmv_oflags & BMV_OF_LAST) 1071 fiemap_flags |= FIEMAP_EXTENT_LAST; 1072 1073 error = fiemap_fill_next_extent(fieinfo, logical, physical, 1074 length, fiemap_flags); 1075 if (error > 0) { 1076 error = 0; 1077 *full = 1; /* user array now full */ 1078 } 1079 1080 return error; 1081 } 1082 1083 STATIC int 1084 xfs_vn_fiemap( 1085 struct inode *inode, 1086 struct fiemap_extent_info *fieinfo, 1087 u64 start, 1088 u64 length) 1089 { 1090 xfs_inode_t *ip = XFS_I(inode); 1091 struct getbmapx bm; 1092 int error; 1093 1094 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); 1095 if (error) 1096 return error; 1097 1098 /* Set up bmap header for xfs internal routine */ 1099 bm.bmv_offset = BTOBBT(start); 1100 /* Special case for whole file */ 1101 if (length == FIEMAP_MAX_OFFSET) 1102 bm.bmv_length = -1LL; 1103 else 1104 bm.bmv_length = BTOBB(start + length) - bm.bmv_offset; 1105 1106 /* We add one because in getbmap world count includes the header */ 1107 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : 1108 fieinfo->fi_extents_max + 1; 1109 bm.bmv_count = min_t(__s32, bm.bmv_count, 1110 (PAGE_SIZE * 16 / sizeof(struct getbmapx))); 1111 bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; 1112 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) 1113 bm.bmv_iflags |= BMV_IF_ATTRFORK; 1114 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) 1115 bm.bmv_iflags |= BMV_IF_DELALLOC; 1116 1117 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); 1118 if (error) 1119 return error; 1120 1121 return 0; 1122 } 1123 1124 STATIC int 1125 xfs_vn_tmpfile( 1126 struct inode *dir, 1127 struct dentry *dentry, 1128 umode_t mode) 1129 { 1130 return xfs_generic_create(dir, dentry, mode, 0, true); 1131 } 1132 1133 static const struct inode_operations xfs_inode_operations = { 1134 .get_acl = xfs_get_acl, 1135 .set_acl = xfs_set_acl, 1136 .getattr = xfs_vn_getattr, 1137 .setattr = xfs_vn_setattr, 1138 .setxattr = generic_setxattr, 1139 .getxattr = generic_getxattr, 1140 .removexattr = generic_removexattr, 1141 .listxattr = xfs_vn_listxattr, 1142 .fiemap = xfs_vn_fiemap, 1143 .update_time = xfs_vn_update_time, 1144 }; 1145 1146 static const struct inode_operations xfs_dir_inode_operations = { 1147 .create = xfs_vn_create, 1148 .lookup = xfs_vn_lookup, 1149 .link = xfs_vn_link, 1150 .unlink = xfs_vn_unlink, 1151 .symlink = xfs_vn_symlink, 1152 .mkdir = xfs_vn_mkdir, 1153 /* 1154 * Yes, XFS uses the same method for rmdir and unlink. 1155 * 1156 * There are some subtile differences deeper in the code, 1157 * but we use S_ISDIR to check for those. 1158 */ 1159 .rmdir = xfs_vn_unlink, 1160 .mknod = xfs_vn_mknod, 1161 .rename2 = xfs_vn_rename, 1162 .get_acl = xfs_get_acl, 1163 .set_acl = xfs_set_acl, 1164 .getattr = xfs_vn_getattr, 1165 .setattr = xfs_vn_setattr, 1166 .setxattr = generic_setxattr, 1167 .getxattr = generic_getxattr, 1168 .removexattr = generic_removexattr, 1169 .listxattr = xfs_vn_listxattr, 1170 .update_time = xfs_vn_update_time, 1171 .tmpfile = xfs_vn_tmpfile, 1172 }; 1173 1174 static const struct inode_operations xfs_dir_ci_inode_operations = { 1175 .create = xfs_vn_create, 1176 .lookup = xfs_vn_ci_lookup, 1177 .link = xfs_vn_link, 1178 .unlink = xfs_vn_unlink, 1179 .symlink = xfs_vn_symlink, 1180 .mkdir = xfs_vn_mkdir, 1181 /* 1182 * Yes, XFS uses the same method for rmdir and unlink. 1183 * 1184 * There are some subtile differences deeper in the code, 1185 * but we use S_ISDIR to check for those. 1186 */ 1187 .rmdir = xfs_vn_unlink, 1188 .mknod = xfs_vn_mknod, 1189 .rename2 = xfs_vn_rename, 1190 .get_acl = xfs_get_acl, 1191 .set_acl = xfs_set_acl, 1192 .getattr = xfs_vn_getattr, 1193 .setattr = xfs_vn_setattr, 1194 .setxattr = generic_setxattr, 1195 .getxattr = generic_getxattr, 1196 .removexattr = generic_removexattr, 1197 .listxattr = xfs_vn_listxattr, 1198 .update_time = xfs_vn_update_time, 1199 .tmpfile = xfs_vn_tmpfile, 1200 }; 1201 1202 static const struct inode_operations xfs_symlink_inode_operations = { 1203 .readlink = generic_readlink, 1204 .follow_link = xfs_vn_follow_link, 1205 .put_link = kfree_put_link, 1206 .getattr = xfs_vn_getattr, 1207 .setattr = xfs_vn_setattr, 1208 .setxattr = generic_setxattr, 1209 .getxattr = generic_getxattr, 1210 .removexattr = generic_removexattr, 1211 .listxattr = xfs_vn_listxattr, 1212 .update_time = xfs_vn_update_time, 1213 }; 1214 1215 STATIC void 1216 xfs_diflags_to_iflags( 1217 struct inode *inode, 1218 struct xfs_inode *ip) 1219 { 1220 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) 1221 inode->i_flags |= S_IMMUTABLE; 1222 else 1223 inode->i_flags &= ~S_IMMUTABLE; 1224 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) 1225 inode->i_flags |= S_APPEND; 1226 else 1227 inode->i_flags &= ~S_APPEND; 1228 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) 1229 inode->i_flags |= S_SYNC; 1230 else 1231 inode->i_flags &= ~S_SYNC; 1232 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) 1233 inode->i_flags |= S_NOATIME; 1234 else 1235 inode->i_flags &= ~S_NOATIME; 1236 } 1237 1238 /* 1239 * Initialize the Linux inode, set up the operation vectors and 1240 * unlock the inode. 1241 * 1242 * When reading existing inodes from disk this is called directly 1243 * from xfs_iget, when creating a new inode it is called from 1244 * xfs_ialloc after setting up the inode. 1245 * 1246 * We are always called with an uninitialised linux inode here. 1247 * We need to initialise the necessary fields and take a reference 1248 * on it. 1249 */ 1250 void 1251 xfs_setup_inode( 1252 struct xfs_inode *ip) 1253 { 1254 struct inode *inode = &ip->i_vnode; 1255 gfp_t gfp_mask; 1256 1257 inode->i_ino = ip->i_ino; 1258 inode->i_state = I_NEW; 1259 1260 inode_sb_list_add(inode); 1261 /* make the inode look hashed for the writeback code */ 1262 hlist_add_fake(&inode->i_hash); 1263 1264 inode->i_mode = ip->i_d.di_mode; 1265 set_nlink(inode, ip->i_d.di_nlink); 1266 inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); 1267 inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); 1268 1269 switch (inode->i_mode & S_IFMT) { 1270 case S_IFBLK: 1271 case S_IFCHR: 1272 inode->i_rdev = 1273 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, 1274 sysv_minor(ip->i_df.if_u2.if_rdev)); 1275 break; 1276 default: 1277 inode->i_rdev = 0; 1278 break; 1279 } 1280 1281 inode->i_generation = ip->i_d.di_gen; 1282 i_size_write(inode, ip->i_d.di_size); 1283 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; 1284 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; 1285 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; 1286 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; 1287 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; 1288 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; 1289 xfs_diflags_to_iflags(inode, ip); 1290 1291 ip->d_ops = ip->i_mount->m_nondir_inode_ops; 1292 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); 1293 switch (inode->i_mode & S_IFMT) { 1294 case S_IFREG: 1295 inode->i_op = &xfs_inode_operations; 1296 inode->i_fop = &xfs_file_operations; 1297 inode->i_mapping->a_ops = &xfs_address_space_operations; 1298 break; 1299 case S_IFDIR: 1300 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); 1301 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) 1302 inode->i_op = &xfs_dir_ci_inode_operations; 1303 else 1304 inode->i_op = &xfs_dir_inode_operations; 1305 inode->i_fop = &xfs_dir_file_operations; 1306 ip->d_ops = ip->i_mount->m_dir_inode_ops; 1307 break; 1308 case S_IFLNK: 1309 inode->i_op = &xfs_symlink_inode_operations; 1310 if (!(ip->i_df.if_flags & XFS_IFINLINE)) 1311 inode->i_mapping->a_ops = &xfs_address_space_operations; 1312 break; 1313 default: 1314 inode->i_op = &xfs_inode_operations; 1315 init_special_inode(inode, inode->i_mode, inode->i_rdev); 1316 break; 1317 } 1318 1319 /* 1320 * Ensure all page cache allocations are done from GFP_NOFS context to 1321 * prevent direct reclaim recursion back into the filesystem and blowing 1322 * stacks or deadlocking. 1323 */ 1324 gfp_mask = mapping_gfp_mask(inode->i_mapping); 1325 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); 1326 1327 /* 1328 * If there is no attribute fork no ACL can exist on this inode, 1329 * and it can't have any file capabilities attached to it either. 1330 */ 1331 if (!XFS_IFORK_Q(ip)) { 1332 inode_has_no_xattr(inode); 1333 cache_no_acl(inode); 1334 } 1335 1336 xfs_iflags_clear(ip, XFS_INEW); 1337 barrier(); 1338 1339 unlock_new_inode(inode); 1340 } 1341