1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_inode.h" 14 #include "xfs_acl.h" 15 #include "xfs_quota.h" 16 #include "xfs_attr.h" 17 #include "xfs_trans.h" 18 #include "xfs_trace.h" 19 #include "xfs_icache.h" 20 #include "xfs_symlink.h" 21 #include "xfs_dir2.h" 22 #include "xfs_iomap.h" 23 #include "xfs_error.h" 24 #include "xfs_ioctl.h" 25 26 #include <linux/posix_acl.h> 27 #include <linux/security.h> 28 #include <linux/iversion.h> 29 #include <linux/fiemap.h> 30 31 /* 32 * Directories have different lock order w.r.t. mmap_lock compared to regular 33 * files. This is due to readdir potentially triggering page faults on a user 34 * buffer inside filldir(), and this happens with the ilock on the directory 35 * held. For regular files, the lock order is the other way around - the 36 * mmap_lock is taken during the page fault, and then we lock the ilock to do 37 * block mapping. Hence we need a different class for the directory ilock so 38 * that lockdep can tell them apart. 39 */ 40 static struct lock_class_key xfs_nondir_ilock_class; 41 static struct lock_class_key xfs_dir_ilock_class; 42 43 static int 44 xfs_initxattrs( 45 struct inode *inode, 46 const struct xattr *xattr_array, 47 void *fs_info) 48 { 49 const struct xattr *xattr; 50 struct xfs_inode *ip = XFS_I(inode); 51 int error = 0; 52 53 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 54 struct xfs_da_args args = { 55 .dp = ip, 56 .attr_filter = XFS_ATTR_SECURE, 57 .name = xattr->name, 58 .namelen = strlen(xattr->name), 59 .value = xattr->value, 60 .valuelen = xattr->value_len, 61 }; 62 error = xfs_attr_set(&args); 63 if (error < 0) 64 break; 65 } 66 return error; 67 } 68 69 /* 70 * Hook in SELinux. This is not quite correct yet, what we really need 71 * here (as we do for default ACLs) is a mechanism by which creation of 72 * these attrs can be journalled at inode creation time (along with the 73 * inode, of course, such that log replay can't cause these to be lost). 74 */ 75 76 STATIC int 77 xfs_init_security( 78 struct inode *inode, 79 struct inode *dir, 80 const struct qstr *qstr) 81 { 82 return security_inode_init_security(inode, dir, qstr, 83 &xfs_initxattrs, NULL); 84 } 85 86 static void 87 xfs_dentry_to_name( 88 struct xfs_name *namep, 89 struct dentry *dentry) 90 { 91 namep->name = dentry->d_name.name; 92 namep->len = dentry->d_name.len; 93 namep->type = XFS_DIR3_FT_UNKNOWN; 94 } 95 96 static int 97 xfs_dentry_mode_to_name( 98 struct xfs_name *namep, 99 struct dentry *dentry, 100 int mode) 101 { 102 namep->name = dentry->d_name.name; 103 namep->len = dentry->d_name.len; 104 namep->type = xfs_mode_to_ftype(mode); 105 106 if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN)) 107 return -EFSCORRUPTED; 108 109 return 0; 110 } 111 112 STATIC void 113 xfs_cleanup_inode( 114 struct inode *dir, 115 struct inode *inode, 116 struct dentry *dentry) 117 { 118 struct xfs_name teardown; 119 120 /* Oh, the horror. 121 * If we can't add the ACL or we fail in 122 * xfs_init_security we must back out. 123 * ENOSPC can hit here, among other things. 124 */ 125 xfs_dentry_to_name(&teardown, dentry); 126 127 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); 128 } 129 130 STATIC int 131 xfs_generic_create( 132 struct user_namespace *mnt_userns, 133 struct inode *dir, 134 struct dentry *dentry, 135 umode_t mode, 136 dev_t rdev, 137 bool tmpfile) /* unnamed file */ 138 { 139 struct inode *inode; 140 struct xfs_inode *ip = NULL; 141 struct posix_acl *default_acl, *acl; 142 struct xfs_name name; 143 int error; 144 145 /* 146 * Irix uses Missed'em'V split, but doesn't want to see 147 * the upper 5 bits of (14bit) major. 148 */ 149 if (S_ISCHR(mode) || S_ISBLK(mode)) { 150 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) 151 return -EINVAL; 152 } else { 153 rdev = 0; 154 } 155 156 error = posix_acl_create(dir, &mode, &default_acl, &acl); 157 if (error) 158 return error; 159 160 /* Verify mode is valid also for tmpfile case */ 161 error = xfs_dentry_mode_to_name(&name, dentry, mode); 162 if (unlikely(error)) 163 goto out_free_acl; 164 165 if (!tmpfile) { 166 error = xfs_create(mnt_userns, XFS_I(dir), &name, mode, rdev, 167 &ip); 168 } else { 169 error = xfs_create_tmpfile(mnt_userns, XFS_I(dir), mode, &ip); 170 } 171 if (unlikely(error)) 172 goto out_free_acl; 173 174 inode = VFS_I(ip); 175 176 error = xfs_init_security(inode, dir, &dentry->d_name); 177 if (unlikely(error)) 178 goto out_cleanup_inode; 179 180 #ifdef CONFIG_XFS_POSIX_ACL 181 if (default_acl) { 182 error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 183 if (error) 184 goto out_cleanup_inode; 185 } 186 if (acl) { 187 error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); 188 if (error) 189 goto out_cleanup_inode; 190 } 191 #endif 192 193 xfs_setup_iops(ip); 194 195 if (tmpfile) { 196 /* 197 * The VFS requires that any inode fed to d_tmpfile must have 198 * nlink == 1 so that it can decrement the nlink in d_tmpfile. 199 * However, we created the temp file with nlink == 0 because 200 * we're not allowed to put an inode with nlink > 0 on the 201 * unlinked list. Therefore we have to set nlink to 1 so that 202 * d_tmpfile can immediately set it back to zero. 203 */ 204 set_nlink(inode, 1); 205 d_tmpfile(dentry, inode); 206 } else 207 d_instantiate(dentry, inode); 208 209 xfs_finish_inode_setup(ip); 210 211 out_free_acl: 212 posix_acl_release(default_acl); 213 posix_acl_release(acl); 214 return error; 215 216 out_cleanup_inode: 217 xfs_finish_inode_setup(ip); 218 if (!tmpfile) 219 xfs_cleanup_inode(dir, inode, dentry); 220 xfs_irele(ip); 221 goto out_free_acl; 222 } 223 224 STATIC int 225 xfs_vn_mknod( 226 struct user_namespace *mnt_userns, 227 struct inode *dir, 228 struct dentry *dentry, 229 umode_t mode, 230 dev_t rdev) 231 { 232 return xfs_generic_create(mnt_userns, dir, dentry, mode, rdev, false); 233 } 234 235 STATIC int 236 xfs_vn_create( 237 struct user_namespace *mnt_userns, 238 struct inode *dir, 239 struct dentry *dentry, 240 umode_t mode, 241 bool flags) 242 { 243 return xfs_generic_create(mnt_userns, dir, dentry, mode, 0, false); 244 } 245 246 STATIC int 247 xfs_vn_mkdir( 248 struct user_namespace *mnt_userns, 249 struct inode *dir, 250 struct dentry *dentry, 251 umode_t mode) 252 { 253 return xfs_generic_create(mnt_userns, dir, dentry, mode | S_IFDIR, 0, 254 false); 255 } 256 257 STATIC struct dentry * 258 xfs_vn_lookup( 259 struct inode *dir, 260 struct dentry *dentry, 261 unsigned int flags) 262 { 263 struct inode *inode; 264 struct xfs_inode *cip; 265 struct xfs_name name; 266 int error; 267 268 if (dentry->d_name.len >= MAXNAMELEN) 269 return ERR_PTR(-ENAMETOOLONG); 270 271 xfs_dentry_to_name(&name, dentry); 272 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); 273 if (likely(!error)) 274 inode = VFS_I(cip); 275 else if (likely(error == -ENOENT)) 276 inode = NULL; 277 else 278 inode = ERR_PTR(error); 279 return d_splice_alias(inode, dentry); 280 } 281 282 STATIC struct dentry * 283 xfs_vn_ci_lookup( 284 struct inode *dir, 285 struct dentry *dentry, 286 unsigned int flags) 287 { 288 struct xfs_inode *ip; 289 struct xfs_name xname; 290 struct xfs_name ci_name; 291 struct qstr dname; 292 int error; 293 294 if (dentry->d_name.len >= MAXNAMELEN) 295 return ERR_PTR(-ENAMETOOLONG); 296 297 xfs_dentry_to_name(&xname, dentry); 298 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); 299 if (unlikely(error)) { 300 if (unlikely(error != -ENOENT)) 301 return ERR_PTR(error); 302 /* 303 * call d_add(dentry, NULL) here when d_drop_negative_children 304 * is called in xfs_vn_mknod (ie. allow negative dentries 305 * with CI filesystems). 306 */ 307 return NULL; 308 } 309 310 /* if exact match, just splice and exit */ 311 if (!ci_name.name) 312 return d_splice_alias(VFS_I(ip), dentry); 313 314 /* else case-insensitive match... */ 315 dname.name = ci_name.name; 316 dname.len = ci_name.len; 317 dentry = d_add_ci(dentry, VFS_I(ip), &dname); 318 kmem_free(ci_name.name); 319 return dentry; 320 } 321 322 STATIC int 323 xfs_vn_link( 324 struct dentry *old_dentry, 325 struct inode *dir, 326 struct dentry *dentry) 327 { 328 struct inode *inode = d_inode(old_dentry); 329 struct xfs_name name; 330 int error; 331 332 error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode); 333 if (unlikely(error)) 334 return error; 335 336 error = xfs_link(XFS_I(dir), XFS_I(inode), &name); 337 if (unlikely(error)) 338 return error; 339 340 ihold(inode); 341 d_instantiate(dentry, inode); 342 return 0; 343 } 344 345 STATIC int 346 xfs_vn_unlink( 347 struct inode *dir, 348 struct dentry *dentry) 349 { 350 struct xfs_name name; 351 int error; 352 353 xfs_dentry_to_name(&name, dentry); 354 355 error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); 356 if (error) 357 return error; 358 359 /* 360 * With unlink, the VFS makes the dentry "negative": no inode, 361 * but still hashed. This is incompatible with case-insensitive 362 * mode, so invalidate (unhash) the dentry in CI-mode. 363 */ 364 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) 365 d_invalidate(dentry); 366 return 0; 367 } 368 369 STATIC int 370 xfs_vn_symlink( 371 struct user_namespace *mnt_userns, 372 struct inode *dir, 373 struct dentry *dentry, 374 const char *symname) 375 { 376 struct inode *inode; 377 struct xfs_inode *cip = NULL; 378 struct xfs_name name; 379 int error; 380 umode_t mode; 381 382 mode = S_IFLNK | 383 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); 384 error = xfs_dentry_mode_to_name(&name, dentry, mode); 385 if (unlikely(error)) 386 goto out; 387 388 error = xfs_symlink(mnt_userns, XFS_I(dir), &name, symname, mode, &cip); 389 if (unlikely(error)) 390 goto out; 391 392 inode = VFS_I(cip); 393 394 error = xfs_init_security(inode, dir, &dentry->d_name); 395 if (unlikely(error)) 396 goto out_cleanup_inode; 397 398 xfs_setup_iops(cip); 399 400 d_instantiate(dentry, inode); 401 xfs_finish_inode_setup(cip); 402 return 0; 403 404 out_cleanup_inode: 405 xfs_finish_inode_setup(cip); 406 xfs_cleanup_inode(dir, inode, dentry); 407 xfs_irele(cip); 408 out: 409 return error; 410 } 411 412 STATIC int 413 xfs_vn_rename( 414 struct user_namespace *mnt_userns, 415 struct inode *odir, 416 struct dentry *odentry, 417 struct inode *ndir, 418 struct dentry *ndentry, 419 unsigned int flags) 420 { 421 struct inode *new_inode = d_inode(ndentry); 422 int omode = 0; 423 int error; 424 struct xfs_name oname; 425 struct xfs_name nname; 426 427 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) 428 return -EINVAL; 429 430 /* if we are exchanging files, we need to set i_mode of both files */ 431 if (flags & RENAME_EXCHANGE) 432 omode = d_inode(ndentry)->i_mode; 433 434 error = xfs_dentry_mode_to_name(&oname, odentry, omode); 435 if (omode && unlikely(error)) 436 return error; 437 438 error = xfs_dentry_mode_to_name(&nname, ndentry, 439 d_inode(odentry)->i_mode); 440 if (unlikely(error)) 441 return error; 442 443 return xfs_rename(mnt_userns, XFS_I(odir), &oname, 444 XFS_I(d_inode(odentry)), XFS_I(ndir), &nname, 445 new_inode ? XFS_I(new_inode) : NULL, flags); 446 } 447 448 /* 449 * careful here - this function can get called recursively, so 450 * we need to be very careful about how much stack we use. 451 * uio is kmalloced for this reason... 452 */ 453 STATIC const char * 454 xfs_vn_get_link( 455 struct dentry *dentry, 456 struct inode *inode, 457 struct delayed_call *done) 458 { 459 char *link; 460 int error = -ENOMEM; 461 462 if (!dentry) 463 return ERR_PTR(-ECHILD); 464 465 link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL); 466 if (!link) 467 goto out_err; 468 469 error = xfs_readlink(XFS_I(d_inode(dentry)), link); 470 if (unlikely(error)) 471 goto out_kfree; 472 473 set_delayed_call(done, kfree_link, link); 474 return link; 475 476 out_kfree: 477 kfree(link); 478 out_err: 479 return ERR_PTR(error); 480 } 481 482 STATIC const char * 483 xfs_vn_get_link_inline( 484 struct dentry *dentry, 485 struct inode *inode, 486 struct delayed_call *done) 487 { 488 struct xfs_inode *ip = XFS_I(inode); 489 char *link; 490 491 ASSERT(ip->i_df.if_flags & XFS_IFINLINE); 492 493 /* 494 * The VFS crashes on a NULL pointer, so return -EFSCORRUPTED if 495 * if_data is junk. 496 */ 497 link = ip->i_df.if_u1.if_data; 498 if (XFS_IS_CORRUPT(ip->i_mount, !link)) 499 return ERR_PTR(-EFSCORRUPTED); 500 return link; 501 } 502 503 static uint32_t 504 xfs_stat_blksize( 505 struct xfs_inode *ip) 506 { 507 struct xfs_mount *mp = ip->i_mount; 508 509 /* 510 * If the file blocks are being allocated from a realtime volume, then 511 * always return the realtime extent size. 512 */ 513 if (XFS_IS_REALTIME_INODE(ip)) 514 return xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; 515 516 /* 517 * Allow large block sizes to be reported to userspace programs if the 518 * "largeio" mount option is used. 519 * 520 * If compatibility mode is specified, simply return the basic unit of 521 * caching so that we don't get inefficient read/modify/write I/O from 522 * user apps. Otherwise.... 523 * 524 * If the underlying volume is a stripe, then return the stripe width in 525 * bytes as the recommended I/O size. It is not a stripe and we've set a 526 * default buffered I/O size, return that, otherwise return the compat 527 * default. 528 */ 529 if (mp->m_flags & XFS_MOUNT_LARGEIO) { 530 if (mp->m_swidth) 531 return mp->m_swidth << mp->m_sb.sb_blocklog; 532 if (mp->m_flags & XFS_MOUNT_ALLOCSIZE) 533 return 1U << mp->m_allocsize_log; 534 } 535 536 return PAGE_SIZE; 537 } 538 539 STATIC int 540 xfs_vn_getattr( 541 struct user_namespace *mnt_userns, 542 const struct path *path, 543 struct kstat *stat, 544 u32 request_mask, 545 unsigned int query_flags) 546 { 547 struct inode *inode = d_inode(path->dentry); 548 struct xfs_inode *ip = XFS_I(inode); 549 struct xfs_mount *mp = ip->i_mount; 550 551 trace_xfs_getattr(ip); 552 553 if (XFS_FORCED_SHUTDOWN(mp)) 554 return -EIO; 555 556 stat->size = XFS_ISIZE(ip); 557 stat->dev = inode->i_sb->s_dev; 558 stat->mode = inode->i_mode; 559 stat->nlink = inode->i_nlink; 560 stat->uid = i_uid_into_mnt(mnt_userns, inode); 561 stat->gid = i_gid_into_mnt(mnt_userns, inode); 562 stat->ino = ip->i_ino; 563 stat->atime = inode->i_atime; 564 stat->mtime = inode->i_mtime; 565 stat->ctime = inode->i_ctime; 566 stat->blocks = 567 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); 568 569 if (xfs_sb_version_has_v3inode(&mp->m_sb)) { 570 if (request_mask & STATX_BTIME) { 571 stat->result_mask |= STATX_BTIME; 572 stat->btime = ip->i_d.di_crtime; 573 } 574 } 575 576 /* 577 * Note: If you add another clause to set an attribute flag, please 578 * update attributes_mask below. 579 */ 580 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) 581 stat->attributes |= STATX_ATTR_IMMUTABLE; 582 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) 583 stat->attributes |= STATX_ATTR_APPEND; 584 if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP) 585 stat->attributes |= STATX_ATTR_NODUMP; 586 587 stat->attributes_mask |= (STATX_ATTR_IMMUTABLE | 588 STATX_ATTR_APPEND | 589 STATX_ATTR_NODUMP); 590 591 switch (inode->i_mode & S_IFMT) { 592 case S_IFBLK: 593 case S_IFCHR: 594 stat->blksize = BLKDEV_IOSIZE; 595 stat->rdev = inode->i_rdev; 596 break; 597 default: 598 stat->blksize = xfs_stat_blksize(ip); 599 stat->rdev = 0; 600 break; 601 } 602 603 return 0; 604 } 605 606 static void 607 xfs_setattr_mode( 608 struct xfs_inode *ip, 609 struct iattr *iattr) 610 { 611 struct inode *inode = VFS_I(ip); 612 umode_t mode = iattr->ia_mode; 613 614 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 615 616 inode->i_mode &= S_IFMT; 617 inode->i_mode |= mode & ~S_IFMT; 618 } 619 620 void 621 xfs_setattr_time( 622 struct xfs_inode *ip, 623 struct iattr *iattr) 624 { 625 struct inode *inode = VFS_I(ip); 626 627 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 628 629 if (iattr->ia_valid & ATTR_ATIME) 630 inode->i_atime = iattr->ia_atime; 631 if (iattr->ia_valid & ATTR_CTIME) 632 inode->i_ctime = iattr->ia_ctime; 633 if (iattr->ia_valid & ATTR_MTIME) 634 inode->i_mtime = iattr->ia_mtime; 635 } 636 637 static int 638 xfs_vn_change_ok( 639 struct user_namespace *mnt_userns, 640 struct dentry *dentry, 641 struct iattr *iattr) 642 { 643 struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; 644 645 if (mp->m_flags & XFS_MOUNT_RDONLY) 646 return -EROFS; 647 648 if (XFS_FORCED_SHUTDOWN(mp)) 649 return -EIO; 650 651 return setattr_prepare(mnt_userns, dentry, iattr); 652 } 653 654 /* 655 * Set non-size attributes of an inode. 656 * 657 * Caution: The caller of this function is responsible for calling 658 * setattr_prepare() or otherwise verifying the change is fine. 659 */ 660 static int 661 xfs_setattr_nonsize( 662 struct user_namespace *mnt_userns, 663 struct xfs_inode *ip, 664 struct iattr *iattr) 665 { 666 xfs_mount_t *mp = ip->i_mount; 667 struct inode *inode = VFS_I(ip); 668 int mask = iattr->ia_valid; 669 xfs_trans_t *tp; 670 int error; 671 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; 672 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; 673 struct xfs_dquot *udqp = NULL, *gdqp = NULL; 674 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; 675 676 ASSERT((mask & ATTR_SIZE) == 0); 677 678 /* 679 * If disk quotas is on, we make sure that the dquots do exist on disk, 680 * before we start any other transactions. Trying to do this later 681 * is messy. We don't care to take a readlock to look at the ids 682 * in inode here, because we can't hold it across the trans_reserve. 683 * If the IDs do change before we take the ilock, we're covered 684 * because the i_*dquot fields will get updated anyway. 685 */ 686 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { 687 uint qflags = 0; 688 689 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { 690 uid = iattr->ia_uid; 691 qflags |= XFS_QMOPT_UQUOTA; 692 } else { 693 uid = inode->i_uid; 694 } 695 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { 696 gid = iattr->ia_gid; 697 qflags |= XFS_QMOPT_GQUOTA; 698 } else { 699 gid = inode->i_gid; 700 } 701 702 /* 703 * We take a reference when we initialize udqp and gdqp, 704 * so it is important that we never blindly double trip on 705 * the same variable. See xfs_create() for an example. 706 */ 707 ASSERT(udqp == NULL); 708 ASSERT(gdqp == NULL); 709 error = xfs_qm_vop_dqalloc(ip, uid, gid, ip->i_d.di_projid, 710 qflags, &udqp, &gdqp, NULL); 711 if (error) 712 return error; 713 } 714 715 error = xfs_trans_alloc_ichange(ip, udqp, gdqp, NULL, 716 capable(CAP_FOWNER), &tp); 717 if (error) 718 goto out_dqrele; 719 720 /* 721 * Change file ownership. Must be the owner or privileged. 722 */ 723 if (mask & (ATTR_UID|ATTR_GID)) { 724 /* 725 * These IDs could have changed since we last looked at them. 726 * But, we're assured that if the ownership did change 727 * while we didn't have the inode locked, inode's dquot(s) 728 * would have changed also. 729 */ 730 iuid = inode->i_uid; 731 igid = inode->i_gid; 732 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; 733 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; 734 735 /* 736 * CAP_FSETID overrides the following restrictions: 737 * 738 * The set-user-ID and set-group-ID bits of a file will be 739 * cleared upon successful return from chown() 740 */ 741 if ((inode->i_mode & (S_ISUID|S_ISGID)) && 742 !capable(CAP_FSETID)) 743 inode->i_mode &= ~(S_ISUID|S_ISGID); 744 745 /* 746 * Change the ownerships and register quota modifications 747 * in the transaction. 748 */ 749 if (!uid_eq(iuid, uid)) { 750 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { 751 ASSERT(mask & ATTR_UID); 752 ASSERT(udqp); 753 olddquot1 = xfs_qm_vop_chown(tp, ip, 754 &ip->i_udquot, udqp); 755 } 756 inode->i_uid = uid; 757 } 758 if (!gid_eq(igid, gid)) { 759 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { 760 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || 761 !XFS_IS_PQUOTA_ON(mp)); 762 ASSERT(mask & ATTR_GID); 763 ASSERT(gdqp); 764 olddquot2 = xfs_qm_vop_chown(tp, ip, 765 &ip->i_gdquot, gdqp); 766 } 767 inode->i_gid = gid; 768 } 769 } 770 771 if (mask & ATTR_MODE) 772 xfs_setattr_mode(ip, iattr); 773 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) 774 xfs_setattr_time(ip, iattr); 775 776 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 777 778 XFS_STATS_INC(mp, xs_ig_attrchg); 779 780 if (mp->m_flags & XFS_MOUNT_WSYNC) 781 xfs_trans_set_sync(tp); 782 error = xfs_trans_commit(tp); 783 784 /* 785 * Release any dquot(s) the inode had kept before chown. 786 */ 787 xfs_qm_dqrele(olddquot1); 788 xfs_qm_dqrele(olddquot2); 789 xfs_qm_dqrele(udqp); 790 xfs_qm_dqrele(gdqp); 791 792 if (error) 793 return error; 794 795 /* 796 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode 797 * update. We could avoid this with linked transactions 798 * and passing down the transaction pointer all the way 799 * to attr_set. No previous user of the generic 800 * Posix ACL code seems to care about this issue either. 801 */ 802 if (mask & ATTR_MODE) { 803 error = posix_acl_chmod(mnt_userns, inode, inode->i_mode); 804 if (error) 805 return error; 806 } 807 808 return 0; 809 810 out_dqrele: 811 xfs_qm_dqrele(udqp); 812 xfs_qm_dqrele(gdqp); 813 return error; 814 } 815 816 /* 817 * Truncate file. Must have write permission and not be a directory. 818 * 819 * Caution: The caller of this function is responsible for calling 820 * setattr_prepare() or otherwise verifying the change is fine. 821 */ 822 STATIC int 823 xfs_setattr_size( 824 struct user_namespace *mnt_userns, 825 struct xfs_inode *ip, 826 struct iattr *iattr) 827 { 828 struct xfs_mount *mp = ip->i_mount; 829 struct inode *inode = VFS_I(ip); 830 xfs_off_t oldsize, newsize; 831 struct xfs_trans *tp; 832 int error; 833 uint lock_flags = 0; 834 bool did_zeroing = false; 835 836 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 837 ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); 838 ASSERT(S_ISREG(inode->i_mode)); 839 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| 840 ATTR_MTIME_SET|ATTR_TIMES_SET)) == 0); 841 842 oldsize = inode->i_size; 843 newsize = iattr->ia_size; 844 845 /* 846 * Short circuit the truncate case for zero length files. 847 */ 848 if (newsize == 0 && oldsize == 0 && ip->i_df.if_nextents == 0) { 849 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) 850 return 0; 851 852 /* 853 * Use the regular setattr path to update the timestamps. 854 */ 855 iattr->ia_valid &= ~ATTR_SIZE; 856 return xfs_setattr_nonsize(mnt_userns, ip, iattr); 857 } 858 859 /* 860 * Make sure that the dquots are attached to the inode. 861 */ 862 error = xfs_qm_dqattach(ip); 863 if (error) 864 return error; 865 866 /* 867 * Wait for all direct I/O to complete. 868 */ 869 inode_dio_wait(inode); 870 871 /* 872 * File data changes must be complete before we start the transaction to 873 * modify the inode. This needs to be done before joining the inode to 874 * the transaction because the inode cannot be unlocked once it is a 875 * part of the transaction. 876 * 877 * Start with zeroing any data beyond EOF that we may expose on file 878 * extension, or zeroing out the rest of the block on a downward 879 * truncate. 880 */ 881 if (newsize > oldsize) { 882 trace_xfs_zero_eof(ip, oldsize, newsize - oldsize); 883 error = iomap_zero_range(inode, oldsize, newsize - oldsize, 884 &did_zeroing, &xfs_buffered_write_iomap_ops); 885 } else { 886 /* 887 * iomap won't detect a dirty page over an unwritten block (or a 888 * cow block over a hole) and subsequently skips zeroing the 889 * newly post-EOF portion of the page. Flush the new EOF to 890 * convert the block before the pagecache truncate. 891 */ 892 error = filemap_write_and_wait_range(inode->i_mapping, newsize, 893 newsize); 894 if (error) 895 return error; 896 error = iomap_truncate_page(inode, newsize, &did_zeroing, 897 &xfs_buffered_write_iomap_ops); 898 } 899 900 if (error) 901 return error; 902 903 /* 904 * We've already locked out new page faults, so now we can safely remove 905 * pages from the page cache knowing they won't get refaulted until we 906 * drop the XFS_MMAP_EXCL lock after the extent manipulations are 907 * complete. The truncate_setsize() call also cleans partial EOF page 908 * PTEs on extending truncates and hence ensures sub-page block size 909 * filesystems are correctly handled, too. 910 * 911 * We have to do all the page cache truncate work outside the 912 * transaction context as the "lock" order is page lock->log space 913 * reservation as defined by extent allocation in the writeback path. 914 * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but 915 * having already truncated the in-memory version of the file (i.e. made 916 * user visible changes). There's not much we can do about this, except 917 * to hope that the caller sees ENOMEM and retries the truncate 918 * operation. 919 * 920 * And we update in-core i_size and truncate page cache beyond newsize 921 * before writeback the [di_size, newsize] range, so we're guaranteed 922 * not to write stale data past the new EOF on truncate down. 923 */ 924 truncate_setsize(inode, newsize); 925 926 /* 927 * We are going to log the inode size change in this transaction so 928 * any previous writes that are beyond the on disk EOF and the new 929 * EOF that have not been written out need to be written here. If we 930 * do not write the data out, we expose ourselves to the null files 931 * problem. Note that this includes any block zeroing we did above; 932 * otherwise those blocks may not be zeroed after a crash. 933 */ 934 if (did_zeroing || 935 (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { 936 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, 937 ip->i_d.di_size, newsize - 1); 938 if (error) 939 return error; 940 } 941 942 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); 943 if (error) 944 return error; 945 946 lock_flags |= XFS_ILOCK_EXCL; 947 xfs_ilock(ip, XFS_ILOCK_EXCL); 948 xfs_trans_ijoin(tp, ip, 0); 949 950 /* 951 * Only change the c/mtime if we are changing the size or we are 952 * explicitly asked to change it. This handles the semantic difference 953 * between truncate() and ftruncate() as implemented in the VFS. 954 * 955 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a 956 * special case where we need to update the times despite not having 957 * these flags set. For all other operations the VFS set these flags 958 * explicitly if it wants a timestamp update. 959 */ 960 if (newsize != oldsize && 961 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { 962 iattr->ia_ctime = iattr->ia_mtime = 963 current_time(inode); 964 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 965 } 966 967 /* 968 * The first thing we do is set the size to new_size permanently on 969 * disk. This way we don't have to worry about anyone ever being able 970 * to look at the data being freed even in the face of a crash. 971 * What we're getting around here is the case where we free a block, it 972 * is allocated to another file, it is written to, and then we crash. 973 * If the new data gets written to the file but the log buffers 974 * containing the free and reallocation don't, then we'd end up with 975 * garbage in the blocks being freed. As long as we make the new size 976 * permanent before actually freeing any blocks it doesn't matter if 977 * they get written to. 978 */ 979 ip->i_d.di_size = newsize; 980 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 981 982 if (newsize <= oldsize) { 983 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); 984 if (error) 985 goto out_trans_cancel; 986 987 /* 988 * Truncated "down", so we're removing references to old data 989 * here - if we delay flushing for a long time, we expose 990 * ourselves unduly to the notorious NULL files problem. So, 991 * we mark this inode and flush it when the file is closed, 992 * and do not wait the usual (long) time for writeout. 993 */ 994 xfs_iflags_set(ip, XFS_ITRUNCATED); 995 996 /* A truncate down always removes post-EOF blocks. */ 997 xfs_inode_clear_eofblocks_tag(ip); 998 } 999 1000 if (iattr->ia_valid & ATTR_MODE) 1001 xfs_setattr_mode(ip, iattr); 1002 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) 1003 xfs_setattr_time(ip, iattr); 1004 1005 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1006 1007 XFS_STATS_INC(mp, xs_ig_attrchg); 1008 1009 if (mp->m_flags & XFS_MOUNT_WSYNC) 1010 xfs_trans_set_sync(tp); 1011 1012 error = xfs_trans_commit(tp); 1013 out_unlock: 1014 if (lock_flags) 1015 xfs_iunlock(ip, lock_flags); 1016 return error; 1017 1018 out_trans_cancel: 1019 xfs_trans_cancel(tp); 1020 goto out_unlock; 1021 } 1022 1023 int 1024 xfs_vn_setattr_size( 1025 struct user_namespace *mnt_userns, 1026 struct dentry *dentry, 1027 struct iattr *iattr) 1028 { 1029 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1030 int error; 1031 1032 trace_xfs_setattr(ip); 1033 1034 error = xfs_vn_change_ok(mnt_userns, dentry, iattr); 1035 if (error) 1036 return error; 1037 return xfs_setattr_size(mnt_userns, ip, iattr); 1038 } 1039 1040 STATIC int 1041 xfs_vn_setattr( 1042 struct user_namespace *mnt_userns, 1043 struct dentry *dentry, 1044 struct iattr *iattr) 1045 { 1046 struct inode *inode = d_inode(dentry); 1047 struct xfs_inode *ip = XFS_I(inode); 1048 int error; 1049 1050 if (iattr->ia_valid & ATTR_SIZE) { 1051 uint iolock; 1052 1053 xfs_ilock(ip, XFS_MMAPLOCK_EXCL); 1054 iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 1055 1056 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 1057 if (error) { 1058 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); 1059 return error; 1060 } 1061 1062 error = xfs_vn_setattr_size(mnt_userns, dentry, iattr); 1063 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); 1064 } else { 1065 trace_xfs_setattr(ip); 1066 1067 error = xfs_vn_change_ok(mnt_userns, dentry, iattr); 1068 if (!error) 1069 error = xfs_setattr_nonsize(mnt_userns, ip, iattr); 1070 } 1071 1072 return error; 1073 } 1074 1075 STATIC int 1076 xfs_vn_update_time( 1077 struct inode *inode, 1078 struct timespec64 *now, 1079 int flags) 1080 { 1081 struct xfs_inode *ip = XFS_I(inode); 1082 struct xfs_mount *mp = ip->i_mount; 1083 int log_flags = XFS_ILOG_TIMESTAMP; 1084 struct xfs_trans *tp; 1085 int error; 1086 1087 trace_xfs_update_time(ip); 1088 1089 if (inode->i_sb->s_flags & SB_LAZYTIME) { 1090 if (!((flags & S_VERSION) && 1091 inode_maybe_inc_iversion(inode, false))) 1092 return generic_update_time(inode, now, flags); 1093 1094 /* Capture the iversion update that just occurred */ 1095 log_flags |= XFS_ILOG_CORE; 1096 } 1097 1098 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); 1099 if (error) 1100 return error; 1101 1102 xfs_ilock(ip, XFS_ILOCK_EXCL); 1103 if (flags & S_CTIME) 1104 inode->i_ctime = *now; 1105 if (flags & S_MTIME) 1106 inode->i_mtime = *now; 1107 if (flags & S_ATIME) 1108 inode->i_atime = *now; 1109 1110 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 1111 xfs_trans_log_inode(tp, ip, log_flags); 1112 return xfs_trans_commit(tp); 1113 } 1114 1115 STATIC int 1116 xfs_vn_fiemap( 1117 struct inode *inode, 1118 struct fiemap_extent_info *fieinfo, 1119 u64 start, 1120 u64 length) 1121 { 1122 int error; 1123 1124 xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); 1125 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { 1126 fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR; 1127 error = iomap_fiemap(inode, fieinfo, start, length, 1128 &xfs_xattr_iomap_ops); 1129 } else { 1130 error = iomap_fiemap(inode, fieinfo, start, length, 1131 &xfs_read_iomap_ops); 1132 } 1133 xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); 1134 1135 return error; 1136 } 1137 1138 STATIC int 1139 xfs_vn_tmpfile( 1140 struct user_namespace *mnt_userns, 1141 struct inode *dir, 1142 struct dentry *dentry, 1143 umode_t mode) 1144 { 1145 return xfs_generic_create(mnt_userns, dir, dentry, mode, 0, true); 1146 } 1147 1148 static const struct inode_operations xfs_inode_operations = { 1149 .get_acl = xfs_get_acl, 1150 .set_acl = xfs_set_acl, 1151 .getattr = xfs_vn_getattr, 1152 .setattr = xfs_vn_setattr, 1153 .listxattr = xfs_vn_listxattr, 1154 .fiemap = xfs_vn_fiemap, 1155 .update_time = xfs_vn_update_time, 1156 .fileattr_get = xfs_fileattr_get, 1157 .fileattr_set = xfs_fileattr_set, 1158 }; 1159 1160 static const struct inode_operations xfs_dir_inode_operations = { 1161 .create = xfs_vn_create, 1162 .lookup = xfs_vn_lookup, 1163 .link = xfs_vn_link, 1164 .unlink = xfs_vn_unlink, 1165 .symlink = xfs_vn_symlink, 1166 .mkdir = xfs_vn_mkdir, 1167 /* 1168 * Yes, XFS uses the same method for rmdir and unlink. 1169 * 1170 * There are some subtile differences deeper in the code, 1171 * but we use S_ISDIR to check for those. 1172 */ 1173 .rmdir = xfs_vn_unlink, 1174 .mknod = xfs_vn_mknod, 1175 .rename = xfs_vn_rename, 1176 .get_acl = xfs_get_acl, 1177 .set_acl = xfs_set_acl, 1178 .getattr = xfs_vn_getattr, 1179 .setattr = xfs_vn_setattr, 1180 .listxattr = xfs_vn_listxattr, 1181 .update_time = xfs_vn_update_time, 1182 .tmpfile = xfs_vn_tmpfile, 1183 .fileattr_get = xfs_fileattr_get, 1184 .fileattr_set = xfs_fileattr_set, 1185 }; 1186 1187 static const struct inode_operations xfs_dir_ci_inode_operations = { 1188 .create = xfs_vn_create, 1189 .lookup = xfs_vn_ci_lookup, 1190 .link = xfs_vn_link, 1191 .unlink = xfs_vn_unlink, 1192 .symlink = xfs_vn_symlink, 1193 .mkdir = xfs_vn_mkdir, 1194 /* 1195 * Yes, XFS uses the same method for rmdir and unlink. 1196 * 1197 * There are some subtile differences deeper in the code, 1198 * but we use S_ISDIR to check for those. 1199 */ 1200 .rmdir = xfs_vn_unlink, 1201 .mknod = xfs_vn_mknod, 1202 .rename = xfs_vn_rename, 1203 .get_acl = xfs_get_acl, 1204 .set_acl = xfs_set_acl, 1205 .getattr = xfs_vn_getattr, 1206 .setattr = xfs_vn_setattr, 1207 .listxattr = xfs_vn_listxattr, 1208 .update_time = xfs_vn_update_time, 1209 .tmpfile = xfs_vn_tmpfile, 1210 .fileattr_get = xfs_fileattr_get, 1211 .fileattr_set = xfs_fileattr_set, 1212 }; 1213 1214 static const struct inode_operations xfs_symlink_inode_operations = { 1215 .get_link = xfs_vn_get_link, 1216 .getattr = xfs_vn_getattr, 1217 .setattr = xfs_vn_setattr, 1218 .listxattr = xfs_vn_listxattr, 1219 .update_time = xfs_vn_update_time, 1220 }; 1221 1222 static const struct inode_operations xfs_inline_symlink_inode_operations = { 1223 .get_link = xfs_vn_get_link_inline, 1224 .getattr = xfs_vn_getattr, 1225 .setattr = xfs_vn_setattr, 1226 .listxattr = xfs_vn_listxattr, 1227 .update_time = xfs_vn_update_time, 1228 }; 1229 1230 /* Figure out if this file actually supports DAX. */ 1231 static bool 1232 xfs_inode_supports_dax( 1233 struct xfs_inode *ip) 1234 { 1235 struct xfs_mount *mp = ip->i_mount; 1236 1237 /* Only supported on regular files. */ 1238 if (!S_ISREG(VFS_I(ip)->i_mode)) 1239 return false; 1240 1241 /* Only supported on non-reflinked files. */ 1242 if (xfs_is_reflink_inode(ip)) 1243 return false; 1244 1245 /* Block size must match page size */ 1246 if (mp->m_sb.sb_blocksize != PAGE_SIZE) 1247 return false; 1248 1249 /* Device has to support DAX too. */ 1250 return xfs_inode_buftarg(ip)->bt_daxdev != NULL; 1251 } 1252 1253 static bool 1254 xfs_inode_should_enable_dax( 1255 struct xfs_inode *ip) 1256 { 1257 if (!IS_ENABLED(CONFIG_FS_DAX)) 1258 return false; 1259 if (ip->i_mount->m_flags & XFS_MOUNT_DAX_NEVER) 1260 return false; 1261 if (!xfs_inode_supports_dax(ip)) 1262 return false; 1263 if (ip->i_mount->m_flags & XFS_MOUNT_DAX_ALWAYS) 1264 return true; 1265 if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX) 1266 return true; 1267 return false; 1268 } 1269 1270 void 1271 xfs_diflags_to_iflags( 1272 struct xfs_inode *ip, 1273 bool init) 1274 { 1275 struct inode *inode = VFS_I(ip); 1276 unsigned int xflags = xfs_ip2xflags(ip); 1277 unsigned int flags = 0; 1278 1279 ASSERT(!(IS_DAX(inode) && init)); 1280 1281 if (xflags & FS_XFLAG_IMMUTABLE) 1282 flags |= S_IMMUTABLE; 1283 if (xflags & FS_XFLAG_APPEND) 1284 flags |= S_APPEND; 1285 if (xflags & FS_XFLAG_SYNC) 1286 flags |= S_SYNC; 1287 if (xflags & FS_XFLAG_NOATIME) 1288 flags |= S_NOATIME; 1289 if (init && xfs_inode_should_enable_dax(ip)) 1290 flags |= S_DAX; 1291 1292 /* 1293 * S_DAX can only be set during inode initialization and is never set by 1294 * the VFS, so we cannot mask off S_DAX in i_flags. 1295 */ 1296 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | S_NOATIME); 1297 inode->i_flags |= flags; 1298 } 1299 1300 /* 1301 * Initialize the Linux inode. 1302 * 1303 * When reading existing inodes from disk this is called directly from xfs_iget, 1304 * when creating a new inode it is called from xfs_ialloc after setting up the 1305 * inode. These callers have different criteria for clearing XFS_INEW, so leave 1306 * it up to the caller to deal with unlocking the inode appropriately. 1307 */ 1308 void 1309 xfs_setup_inode( 1310 struct xfs_inode *ip) 1311 { 1312 struct inode *inode = &ip->i_vnode; 1313 gfp_t gfp_mask; 1314 1315 inode->i_ino = ip->i_ino; 1316 inode->i_state = I_NEW; 1317 1318 inode_sb_list_add(inode); 1319 /* make the inode look hashed for the writeback code */ 1320 inode_fake_hash(inode); 1321 1322 i_size_write(inode, ip->i_d.di_size); 1323 xfs_diflags_to_iflags(ip, true); 1324 1325 if (S_ISDIR(inode->i_mode)) { 1326 /* 1327 * We set the i_rwsem class here to avoid potential races with 1328 * lockdep_annotate_inode_mutex_key() reinitialising the lock 1329 * after a filehandle lookup has already found the inode in 1330 * cache before it has been unlocked via unlock_new_inode(). 1331 */ 1332 lockdep_set_class(&inode->i_rwsem, 1333 &inode->i_sb->s_type->i_mutex_dir_key); 1334 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); 1335 } else { 1336 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); 1337 } 1338 1339 /* 1340 * Ensure all page cache allocations are done from GFP_NOFS context to 1341 * prevent direct reclaim recursion back into the filesystem and blowing 1342 * stacks or deadlocking. 1343 */ 1344 gfp_mask = mapping_gfp_mask(inode->i_mapping); 1345 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); 1346 1347 /* 1348 * If there is no attribute fork no ACL can exist on this inode, 1349 * and it can't have any file capabilities attached to it either. 1350 */ 1351 if (!XFS_IFORK_Q(ip)) { 1352 inode_has_no_xattr(inode); 1353 cache_no_acl(inode); 1354 } 1355 } 1356 1357 void 1358 xfs_setup_iops( 1359 struct xfs_inode *ip) 1360 { 1361 struct inode *inode = &ip->i_vnode; 1362 1363 switch (inode->i_mode & S_IFMT) { 1364 case S_IFREG: 1365 inode->i_op = &xfs_inode_operations; 1366 inode->i_fop = &xfs_file_operations; 1367 if (IS_DAX(inode)) 1368 inode->i_mapping->a_ops = &xfs_dax_aops; 1369 else 1370 inode->i_mapping->a_ops = &xfs_address_space_operations; 1371 break; 1372 case S_IFDIR: 1373 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) 1374 inode->i_op = &xfs_dir_ci_inode_operations; 1375 else 1376 inode->i_op = &xfs_dir_inode_operations; 1377 inode->i_fop = &xfs_dir_file_operations; 1378 break; 1379 case S_IFLNK: 1380 if (ip->i_df.if_flags & XFS_IFINLINE) 1381 inode->i_op = &xfs_inline_symlink_inode_operations; 1382 else 1383 inode->i_op = &xfs_symlink_inode_operations; 1384 break; 1385 default: 1386 inode->i_op = &xfs_inode_operations; 1387 init_special_inode(inode, inode->i_mode, inode->i_rdev); 1388 break; 1389 } 1390 } 1391