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 25 #include <linux/posix_acl.h> 26 #include <linux/security.h> 27 #include <linux/iversion.h> 28 #include <linux/fiemap.h> 29 30 /* 31 * Directories have different lock order w.r.t. mmap_lock compared to regular 32 * files. This is due to readdir potentially triggering page faults on a user 33 * buffer inside filldir(), and this happens with the ilock on the directory 34 * held. For regular files, the lock order is the other way around - the 35 * mmap_lock is taken during the page fault, and then we lock the ilock to do 36 * block mapping. Hence we need a different class for the directory ilock so 37 * that lockdep can tell them apart. 38 */ 39 static struct lock_class_key xfs_nondir_ilock_class; 40 static struct lock_class_key xfs_dir_ilock_class; 41 42 static int 43 xfs_initxattrs( 44 struct inode *inode, 45 const struct xattr *xattr_array, 46 void *fs_info) 47 { 48 const struct xattr *xattr; 49 struct xfs_inode *ip = XFS_I(inode); 50 int error = 0; 51 52 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 53 struct xfs_da_args args = { 54 .dp = ip, 55 .attr_filter = XFS_ATTR_SECURE, 56 .name = xattr->name, 57 .namelen = strlen(xattr->name), 58 .value = xattr->value, 59 .valuelen = xattr->value_len, 60 }; 61 error = xfs_attr_set(&args); 62 if (error < 0) 63 break; 64 } 65 return error; 66 } 67 68 /* 69 * Hook in SELinux. This is not quite correct yet, what we really need 70 * here (as we do for default ACLs) is a mechanism by which creation of 71 * these attrs can be journalled at inode creation time (along with the 72 * inode, of course, such that log replay can't cause these to be lost). 73 */ 74 75 STATIC int 76 xfs_init_security( 77 struct inode *inode, 78 struct inode *dir, 79 const struct qstr *qstr) 80 { 81 return security_inode_init_security(inode, dir, qstr, 82 &xfs_initxattrs, NULL); 83 } 84 85 static void 86 xfs_dentry_to_name( 87 struct xfs_name *namep, 88 struct dentry *dentry) 89 { 90 namep->name = dentry->d_name.name; 91 namep->len = dentry->d_name.len; 92 namep->type = XFS_DIR3_FT_UNKNOWN; 93 } 94 95 static int 96 xfs_dentry_mode_to_name( 97 struct xfs_name *namep, 98 struct dentry *dentry, 99 int mode) 100 { 101 namep->name = dentry->d_name.name; 102 namep->len = dentry->d_name.len; 103 namep->type = xfs_mode_to_ftype(mode); 104 105 if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN)) 106 return -EFSCORRUPTED; 107 108 return 0; 109 } 110 111 STATIC void 112 xfs_cleanup_inode( 113 struct inode *dir, 114 struct inode *inode, 115 struct dentry *dentry) 116 { 117 struct xfs_name teardown; 118 119 /* Oh, the horror. 120 * If we can't add the ACL or we fail in 121 * xfs_init_security we must back out. 122 * ENOSPC can hit here, among other things. 123 */ 124 xfs_dentry_to_name(&teardown, dentry); 125 126 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); 127 } 128 129 STATIC int 130 xfs_generic_create( 131 struct inode *dir, 132 struct dentry *dentry, 133 umode_t mode, 134 dev_t rdev, 135 bool tmpfile) /* unnamed file */ 136 { 137 struct inode *inode; 138 struct xfs_inode *ip = NULL; 139 struct posix_acl *default_acl, *acl; 140 struct xfs_name name; 141 int error; 142 143 /* 144 * Irix uses Missed'em'V split, but doesn't want to see 145 * the upper 5 bits of (14bit) major. 146 */ 147 if (S_ISCHR(mode) || S_ISBLK(mode)) { 148 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) 149 return -EINVAL; 150 } else { 151 rdev = 0; 152 } 153 154 error = posix_acl_create(dir, &mode, &default_acl, &acl); 155 if (error) 156 return error; 157 158 /* Verify mode is valid also for tmpfile case */ 159 error = xfs_dentry_mode_to_name(&name, dentry, mode); 160 if (unlikely(error)) 161 goto out_free_acl; 162 163 if (!tmpfile) { 164 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); 165 } else { 166 error = xfs_create_tmpfile(XFS_I(dir), mode, &ip); 167 } 168 if (unlikely(error)) 169 goto out_free_acl; 170 171 inode = VFS_I(ip); 172 173 error = xfs_init_security(inode, dir, &dentry->d_name); 174 if (unlikely(error)) 175 goto out_cleanup_inode; 176 177 #ifdef CONFIG_XFS_POSIX_ACL 178 if (default_acl) { 179 error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 180 if (error) 181 goto out_cleanup_inode; 182 } 183 if (acl) { 184 error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); 185 if (error) 186 goto out_cleanup_inode; 187 } 188 #endif 189 190 xfs_setup_iops(ip); 191 192 if (tmpfile) { 193 /* 194 * The VFS requires that any inode fed to d_tmpfile must have 195 * nlink == 1 so that it can decrement the nlink in d_tmpfile. 196 * However, we created the temp file with nlink == 0 because 197 * we're not allowed to put an inode with nlink > 0 on the 198 * unlinked list. Therefore we have to set nlink to 1 so that 199 * d_tmpfile can immediately set it back to zero. 200 */ 201 set_nlink(inode, 1); 202 d_tmpfile(dentry, inode); 203 } else 204 d_instantiate(dentry, inode); 205 206 xfs_finish_inode_setup(ip); 207 208 out_free_acl: 209 if (default_acl) 210 posix_acl_release(default_acl); 211 if (acl) 212 posix_acl_release(acl); 213 return error; 214 215 out_cleanup_inode: 216 xfs_finish_inode_setup(ip); 217 if (!tmpfile) 218 xfs_cleanup_inode(dir, inode, dentry); 219 xfs_irele(ip); 220 goto out_free_acl; 221 } 222 223 STATIC int 224 xfs_vn_mknod( 225 struct inode *dir, 226 struct dentry *dentry, 227 umode_t mode, 228 dev_t rdev) 229 { 230 return xfs_generic_create(dir, dentry, mode, rdev, false); 231 } 232 233 STATIC int 234 xfs_vn_create( 235 struct inode *dir, 236 struct dentry *dentry, 237 umode_t mode, 238 bool flags) 239 { 240 return xfs_generic_create(dir, dentry, mode, 0, false); 241 } 242 243 STATIC int 244 xfs_vn_mkdir( 245 struct inode *dir, 246 struct dentry *dentry, 247 umode_t mode) 248 { 249 return xfs_generic_create(dir, dentry, mode | S_IFDIR, 0, false); 250 } 251 252 STATIC struct dentry * 253 xfs_vn_lookup( 254 struct inode *dir, 255 struct dentry *dentry, 256 unsigned int flags) 257 { 258 struct inode *inode; 259 struct xfs_inode *cip; 260 struct xfs_name name; 261 int error; 262 263 if (dentry->d_name.len >= MAXNAMELEN) 264 return ERR_PTR(-ENAMETOOLONG); 265 266 xfs_dentry_to_name(&name, dentry); 267 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); 268 if (likely(!error)) 269 inode = VFS_I(cip); 270 else if (likely(error == -ENOENT)) 271 inode = NULL; 272 else 273 inode = ERR_PTR(error); 274 return d_splice_alias(inode, dentry); 275 } 276 277 STATIC struct dentry * 278 xfs_vn_ci_lookup( 279 struct inode *dir, 280 struct dentry *dentry, 281 unsigned int flags) 282 { 283 struct xfs_inode *ip; 284 struct xfs_name xname; 285 struct xfs_name ci_name; 286 struct qstr dname; 287 int error; 288 289 if (dentry->d_name.len >= MAXNAMELEN) 290 return ERR_PTR(-ENAMETOOLONG); 291 292 xfs_dentry_to_name(&xname, dentry); 293 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); 294 if (unlikely(error)) { 295 if (unlikely(error != -ENOENT)) 296 return ERR_PTR(error); 297 /* 298 * call d_add(dentry, NULL) here when d_drop_negative_children 299 * is called in xfs_vn_mknod (ie. allow negative dentries 300 * with CI filesystems). 301 */ 302 return NULL; 303 } 304 305 /* if exact match, just splice and exit */ 306 if (!ci_name.name) 307 return d_splice_alias(VFS_I(ip), dentry); 308 309 /* else case-insensitive match... */ 310 dname.name = ci_name.name; 311 dname.len = ci_name.len; 312 dentry = d_add_ci(dentry, VFS_I(ip), &dname); 313 kmem_free(ci_name.name); 314 return dentry; 315 } 316 317 STATIC int 318 xfs_vn_link( 319 struct dentry *old_dentry, 320 struct inode *dir, 321 struct dentry *dentry) 322 { 323 struct inode *inode = d_inode(old_dentry); 324 struct xfs_name name; 325 int error; 326 327 error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode); 328 if (unlikely(error)) 329 return error; 330 331 error = xfs_link(XFS_I(dir), XFS_I(inode), &name); 332 if (unlikely(error)) 333 return error; 334 335 ihold(inode); 336 d_instantiate(dentry, inode); 337 return 0; 338 } 339 340 STATIC int 341 xfs_vn_unlink( 342 struct inode *dir, 343 struct dentry *dentry) 344 { 345 struct xfs_name name; 346 int error; 347 348 xfs_dentry_to_name(&name, dentry); 349 350 error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); 351 if (error) 352 return error; 353 354 /* 355 * With unlink, the VFS makes the dentry "negative": no inode, 356 * but still hashed. This is incompatible with case-insensitive 357 * mode, so invalidate (unhash) the dentry in CI-mode. 358 */ 359 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) 360 d_invalidate(dentry); 361 return 0; 362 } 363 364 STATIC int 365 xfs_vn_symlink( 366 struct inode *dir, 367 struct dentry *dentry, 368 const char *symname) 369 { 370 struct inode *inode; 371 struct xfs_inode *cip = NULL; 372 struct xfs_name name; 373 int error; 374 umode_t mode; 375 376 mode = S_IFLNK | 377 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); 378 error = xfs_dentry_mode_to_name(&name, dentry, mode); 379 if (unlikely(error)) 380 goto out; 381 382 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); 383 if (unlikely(error)) 384 goto out; 385 386 inode = VFS_I(cip); 387 388 error = xfs_init_security(inode, dir, &dentry->d_name); 389 if (unlikely(error)) 390 goto out_cleanup_inode; 391 392 xfs_setup_iops(cip); 393 394 d_instantiate(dentry, inode); 395 xfs_finish_inode_setup(cip); 396 return 0; 397 398 out_cleanup_inode: 399 xfs_finish_inode_setup(cip); 400 xfs_cleanup_inode(dir, inode, dentry); 401 xfs_irele(cip); 402 out: 403 return error; 404 } 405 406 STATIC int 407 xfs_vn_rename( 408 struct inode *odir, 409 struct dentry *odentry, 410 struct inode *ndir, 411 struct dentry *ndentry, 412 unsigned int flags) 413 { 414 struct inode *new_inode = d_inode(ndentry); 415 int omode = 0; 416 int error; 417 struct xfs_name oname; 418 struct xfs_name nname; 419 420 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) 421 return -EINVAL; 422 423 /* if we are exchanging files, we need to set i_mode of both files */ 424 if (flags & RENAME_EXCHANGE) 425 omode = d_inode(ndentry)->i_mode; 426 427 error = xfs_dentry_mode_to_name(&oname, odentry, omode); 428 if (omode && unlikely(error)) 429 return error; 430 431 error = xfs_dentry_mode_to_name(&nname, ndentry, 432 d_inode(odentry)->i_mode); 433 if (unlikely(error)) 434 return error; 435 436 return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)), 437 XFS_I(ndir), &nname, 438 new_inode ? XFS_I(new_inode) : NULL, flags); 439 } 440 441 /* 442 * careful here - this function can get called recursively, so 443 * we need to be very careful about how much stack we use. 444 * uio is kmalloced for this reason... 445 */ 446 STATIC const char * 447 xfs_vn_get_link( 448 struct dentry *dentry, 449 struct inode *inode, 450 struct delayed_call *done) 451 { 452 char *link; 453 int error = -ENOMEM; 454 455 if (!dentry) 456 return ERR_PTR(-ECHILD); 457 458 link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL); 459 if (!link) 460 goto out_err; 461 462 error = xfs_readlink(XFS_I(d_inode(dentry)), link); 463 if (unlikely(error)) 464 goto out_kfree; 465 466 set_delayed_call(done, kfree_link, link); 467 return link; 468 469 out_kfree: 470 kfree(link); 471 out_err: 472 return ERR_PTR(error); 473 } 474 475 STATIC const char * 476 xfs_vn_get_link_inline( 477 struct dentry *dentry, 478 struct inode *inode, 479 struct delayed_call *done) 480 { 481 struct xfs_inode *ip = XFS_I(inode); 482 char *link; 483 484 ASSERT(ip->i_df.if_flags & XFS_IFINLINE); 485 486 /* 487 * The VFS crashes on a NULL pointer, so return -EFSCORRUPTED if 488 * if_data is junk. 489 */ 490 link = ip->i_df.if_u1.if_data; 491 if (XFS_IS_CORRUPT(ip->i_mount, !link)) 492 return ERR_PTR(-EFSCORRUPTED); 493 return link; 494 } 495 496 static uint32_t 497 xfs_stat_blksize( 498 struct xfs_inode *ip) 499 { 500 struct xfs_mount *mp = ip->i_mount; 501 502 /* 503 * If the file blocks are being allocated from a realtime volume, then 504 * always return the realtime extent size. 505 */ 506 if (XFS_IS_REALTIME_INODE(ip)) 507 return xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; 508 509 /* 510 * Allow large block sizes to be reported to userspace programs if the 511 * "largeio" mount option is used. 512 * 513 * If compatibility mode is specified, simply return the basic unit of 514 * caching so that we don't get inefficient read/modify/write I/O from 515 * user apps. Otherwise.... 516 * 517 * If the underlying volume is a stripe, then return the stripe width in 518 * bytes as the recommended I/O size. It is not a stripe and we've set a 519 * default buffered I/O size, return that, otherwise return the compat 520 * default. 521 */ 522 if (mp->m_flags & XFS_MOUNT_LARGEIO) { 523 if (mp->m_swidth) 524 return mp->m_swidth << mp->m_sb.sb_blocklog; 525 if (mp->m_flags & XFS_MOUNT_ALLOCSIZE) 526 return 1U << mp->m_allocsize_log; 527 } 528 529 return PAGE_SIZE; 530 } 531 532 STATIC int 533 xfs_vn_getattr( 534 const struct path *path, 535 struct kstat *stat, 536 u32 request_mask, 537 unsigned int query_flags) 538 { 539 struct inode *inode = d_inode(path->dentry); 540 struct xfs_inode *ip = XFS_I(inode); 541 struct xfs_mount *mp = ip->i_mount; 542 543 trace_xfs_getattr(ip); 544 545 if (XFS_FORCED_SHUTDOWN(mp)) 546 return -EIO; 547 548 stat->size = XFS_ISIZE(ip); 549 stat->dev = inode->i_sb->s_dev; 550 stat->mode = inode->i_mode; 551 stat->nlink = inode->i_nlink; 552 stat->uid = inode->i_uid; 553 stat->gid = inode->i_gid; 554 stat->ino = ip->i_ino; 555 stat->atime = inode->i_atime; 556 stat->mtime = inode->i_mtime; 557 stat->ctime = inode->i_ctime; 558 stat->blocks = 559 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); 560 561 if (xfs_sb_version_has_v3inode(&mp->m_sb)) { 562 if (request_mask & STATX_BTIME) { 563 stat->result_mask |= STATX_BTIME; 564 stat->btime = ip->i_d.di_crtime; 565 } 566 } 567 568 /* 569 * Note: If you add another clause to set an attribute flag, please 570 * update attributes_mask below. 571 */ 572 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) 573 stat->attributes |= STATX_ATTR_IMMUTABLE; 574 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) 575 stat->attributes |= STATX_ATTR_APPEND; 576 if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP) 577 stat->attributes |= STATX_ATTR_NODUMP; 578 579 stat->attributes_mask |= (STATX_ATTR_IMMUTABLE | 580 STATX_ATTR_APPEND | 581 STATX_ATTR_NODUMP); 582 583 switch (inode->i_mode & S_IFMT) { 584 case S_IFBLK: 585 case S_IFCHR: 586 stat->blksize = BLKDEV_IOSIZE; 587 stat->rdev = inode->i_rdev; 588 break; 589 default: 590 stat->blksize = xfs_stat_blksize(ip); 591 stat->rdev = 0; 592 break; 593 } 594 595 return 0; 596 } 597 598 static void 599 xfs_setattr_mode( 600 struct xfs_inode *ip, 601 struct iattr *iattr) 602 { 603 struct inode *inode = VFS_I(ip); 604 umode_t mode = iattr->ia_mode; 605 606 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 607 608 inode->i_mode &= S_IFMT; 609 inode->i_mode |= mode & ~S_IFMT; 610 } 611 612 void 613 xfs_setattr_time( 614 struct xfs_inode *ip, 615 struct iattr *iattr) 616 { 617 struct inode *inode = VFS_I(ip); 618 619 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 620 621 if (iattr->ia_valid & ATTR_ATIME) 622 inode->i_atime = iattr->ia_atime; 623 if (iattr->ia_valid & ATTR_CTIME) 624 inode->i_ctime = iattr->ia_ctime; 625 if (iattr->ia_valid & ATTR_MTIME) 626 inode->i_mtime = iattr->ia_mtime; 627 } 628 629 static int 630 xfs_vn_change_ok( 631 struct dentry *dentry, 632 struct iattr *iattr) 633 { 634 struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; 635 636 if (mp->m_flags & XFS_MOUNT_RDONLY) 637 return -EROFS; 638 639 if (XFS_FORCED_SHUTDOWN(mp)) 640 return -EIO; 641 642 return setattr_prepare(dentry, iattr); 643 } 644 645 /* 646 * Set non-size attributes of an inode. 647 * 648 * Caution: The caller of this function is responsible for calling 649 * setattr_prepare() or otherwise verifying the change is fine. 650 */ 651 int 652 xfs_setattr_nonsize( 653 struct xfs_inode *ip, 654 struct iattr *iattr, 655 int flags) 656 { 657 xfs_mount_t *mp = ip->i_mount; 658 struct inode *inode = VFS_I(ip); 659 int mask = iattr->ia_valid; 660 xfs_trans_t *tp; 661 int error; 662 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; 663 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; 664 struct xfs_dquot *udqp = NULL, *gdqp = NULL; 665 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; 666 667 ASSERT((mask & ATTR_SIZE) == 0); 668 669 /* 670 * If disk quotas is on, we make sure that the dquots do exist on disk, 671 * before we start any other transactions. Trying to do this later 672 * is messy. We don't care to take a readlock to look at the ids 673 * in inode here, because we can't hold it across the trans_reserve. 674 * If the IDs do change before we take the ilock, we're covered 675 * because the i_*dquot fields will get updated anyway. 676 */ 677 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { 678 uint qflags = 0; 679 680 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { 681 uid = iattr->ia_uid; 682 qflags |= XFS_QMOPT_UQUOTA; 683 } else { 684 uid = inode->i_uid; 685 } 686 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { 687 gid = iattr->ia_gid; 688 qflags |= XFS_QMOPT_GQUOTA; 689 } else { 690 gid = inode->i_gid; 691 } 692 693 /* 694 * We take a reference when we initialize udqp and gdqp, 695 * so it is important that we never blindly double trip on 696 * the same variable. See xfs_create() for an example. 697 */ 698 ASSERT(udqp == NULL); 699 ASSERT(gdqp == NULL); 700 error = xfs_qm_vop_dqalloc(ip, uid, gid, ip->i_d.di_projid, 701 qflags, &udqp, &gdqp, NULL); 702 if (error) 703 return error; 704 } 705 706 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 707 if (error) 708 goto out_dqrele; 709 710 xfs_ilock(ip, XFS_ILOCK_EXCL); 711 xfs_trans_ijoin(tp, ip, 0); 712 713 /* 714 * Change file ownership. Must be the owner or privileged. 715 */ 716 if (mask & (ATTR_UID|ATTR_GID)) { 717 /* 718 * These IDs could have changed since we last looked at them. 719 * But, we're assured that if the ownership did change 720 * while we didn't have the inode locked, inode's dquot(s) 721 * would have changed also. 722 */ 723 iuid = inode->i_uid; 724 igid = inode->i_gid; 725 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; 726 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; 727 728 /* 729 * Do a quota reservation only if uid/gid is actually 730 * going to change. 731 */ 732 if (XFS_IS_QUOTA_RUNNING(mp) && 733 ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || 734 (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { 735 ASSERT(tp); 736 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, 737 NULL, capable(CAP_FOWNER) ? 738 XFS_QMOPT_FORCE_RES : 0); 739 if (error) /* out of quota */ 740 goto out_cancel; 741 } 742 743 /* 744 * CAP_FSETID overrides the following restrictions: 745 * 746 * The set-user-ID and set-group-ID bits of a file will be 747 * cleared upon successful return from chown() 748 */ 749 if ((inode->i_mode & (S_ISUID|S_ISGID)) && 750 !capable(CAP_FSETID)) 751 inode->i_mode &= ~(S_ISUID|S_ISGID); 752 753 /* 754 * Change the ownerships and register quota modifications 755 * in the transaction. 756 */ 757 if (!uid_eq(iuid, uid)) { 758 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { 759 ASSERT(mask & ATTR_UID); 760 ASSERT(udqp); 761 olddquot1 = xfs_qm_vop_chown(tp, ip, 762 &ip->i_udquot, udqp); 763 } 764 inode->i_uid = uid; 765 } 766 if (!gid_eq(igid, gid)) { 767 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { 768 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || 769 !XFS_IS_PQUOTA_ON(mp)); 770 ASSERT(mask & ATTR_GID); 771 ASSERT(gdqp); 772 olddquot2 = xfs_qm_vop_chown(tp, ip, 773 &ip->i_gdquot, gdqp); 774 } 775 inode->i_gid = gid; 776 } 777 } 778 779 if (mask & ATTR_MODE) 780 xfs_setattr_mode(ip, iattr); 781 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) 782 xfs_setattr_time(ip, iattr); 783 784 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 785 786 XFS_STATS_INC(mp, xs_ig_attrchg); 787 788 if (mp->m_flags & XFS_MOUNT_WSYNC) 789 xfs_trans_set_sync(tp); 790 error = xfs_trans_commit(tp); 791 792 xfs_iunlock(ip, XFS_ILOCK_EXCL); 793 794 /* 795 * Release any dquot(s) the inode had kept before chown. 796 */ 797 xfs_qm_dqrele(olddquot1); 798 xfs_qm_dqrele(olddquot2); 799 xfs_qm_dqrele(udqp); 800 xfs_qm_dqrele(gdqp); 801 802 if (error) 803 return error; 804 805 /* 806 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode 807 * update. We could avoid this with linked transactions 808 * and passing down the transaction pointer all the way 809 * to attr_set. No previous user of the generic 810 * Posix ACL code seems to care about this issue either. 811 */ 812 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { 813 error = posix_acl_chmod(inode, inode->i_mode); 814 if (error) 815 return error; 816 } 817 818 return 0; 819 820 out_cancel: 821 xfs_trans_cancel(tp); 822 xfs_iunlock(ip, XFS_ILOCK_EXCL); 823 out_dqrele: 824 xfs_qm_dqrele(udqp); 825 xfs_qm_dqrele(gdqp); 826 return error; 827 } 828 829 int 830 xfs_vn_setattr_nonsize( 831 struct dentry *dentry, 832 struct iattr *iattr) 833 { 834 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 835 int error; 836 837 trace_xfs_setattr(ip); 838 839 error = xfs_vn_change_ok(dentry, iattr); 840 if (error) 841 return error; 842 return xfs_setattr_nonsize(ip, iattr, 0); 843 } 844 845 /* 846 * Truncate file. Must have write permission and not be a directory. 847 * 848 * Caution: The caller of this function is responsible for calling 849 * setattr_prepare() or otherwise verifying the change is fine. 850 */ 851 STATIC int 852 xfs_setattr_size( 853 struct xfs_inode *ip, 854 struct iattr *iattr) 855 { 856 struct xfs_mount *mp = ip->i_mount; 857 struct inode *inode = VFS_I(ip); 858 xfs_off_t oldsize, newsize; 859 struct xfs_trans *tp; 860 int error; 861 uint lock_flags = 0; 862 bool did_zeroing = false; 863 864 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 865 ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); 866 ASSERT(S_ISREG(inode->i_mode)); 867 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| 868 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); 869 870 oldsize = inode->i_size; 871 newsize = iattr->ia_size; 872 873 /* 874 * Short circuit the truncate case for zero length files. 875 */ 876 if (newsize == 0 && oldsize == 0 && ip->i_df.if_nextents == 0) { 877 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) 878 return 0; 879 880 /* 881 * Use the regular setattr path to update the timestamps. 882 */ 883 iattr->ia_valid &= ~ATTR_SIZE; 884 return xfs_setattr_nonsize(ip, iattr, 0); 885 } 886 887 /* 888 * Make sure that the dquots are attached to the inode. 889 */ 890 error = xfs_qm_dqattach(ip); 891 if (error) 892 return error; 893 894 /* 895 * Wait for all direct I/O to complete. 896 */ 897 inode_dio_wait(inode); 898 899 /* 900 * File data changes must be complete before we start the transaction to 901 * modify the inode. This needs to be done before joining the inode to 902 * the transaction because the inode cannot be unlocked once it is a 903 * part of the transaction. 904 * 905 * Start with zeroing any data beyond EOF that we may expose on file 906 * extension, or zeroing out the rest of the block on a downward 907 * truncate. 908 */ 909 if (newsize > oldsize) { 910 trace_xfs_zero_eof(ip, oldsize, newsize - oldsize); 911 error = iomap_zero_range(inode, oldsize, newsize - oldsize, 912 &did_zeroing, &xfs_buffered_write_iomap_ops); 913 } else { 914 /* 915 * iomap won't detect a dirty page over an unwritten block (or a 916 * cow block over a hole) and subsequently skips zeroing the 917 * newly post-EOF portion of the page. Flush the new EOF to 918 * convert the block before the pagecache truncate. 919 */ 920 error = filemap_write_and_wait_range(inode->i_mapping, newsize, 921 newsize); 922 if (error) 923 return error; 924 error = iomap_truncate_page(inode, newsize, &did_zeroing, 925 &xfs_buffered_write_iomap_ops); 926 } 927 928 if (error) 929 return error; 930 931 /* 932 * We've already locked out new page faults, so now we can safely remove 933 * pages from the page cache knowing they won't get refaulted until we 934 * drop the XFS_MMAP_EXCL lock after the extent manipulations are 935 * complete. The truncate_setsize() call also cleans partial EOF page 936 * PTEs on extending truncates and hence ensures sub-page block size 937 * filesystems are correctly handled, too. 938 * 939 * We have to do all the page cache truncate work outside the 940 * transaction context as the "lock" order is page lock->log space 941 * reservation as defined by extent allocation in the writeback path. 942 * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but 943 * having already truncated the in-memory version of the file (i.e. made 944 * user visible changes). There's not much we can do about this, except 945 * to hope that the caller sees ENOMEM and retries the truncate 946 * operation. 947 * 948 * And we update in-core i_size and truncate page cache beyond newsize 949 * before writeback the [di_size, newsize] range, so we're guaranteed 950 * not to write stale data past the new EOF on truncate down. 951 */ 952 truncate_setsize(inode, newsize); 953 954 /* 955 * We are going to log the inode size change in this transaction so 956 * any previous writes that are beyond the on disk EOF and the new 957 * EOF that have not been written out need to be written here. If we 958 * do not write the data out, we expose ourselves to the null files 959 * problem. Note that this includes any block zeroing we did above; 960 * otherwise those blocks may not be zeroed after a crash. 961 */ 962 if (did_zeroing || 963 (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { 964 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, 965 ip->i_d.di_size, newsize - 1); 966 if (error) 967 return error; 968 } 969 970 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); 971 if (error) 972 return error; 973 974 lock_flags |= XFS_ILOCK_EXCL; 975 xfs_ilock(ip, XFS_ILOCK_EXCL); 976 xfs_trans_ijoin(tp, ip, 0); 977 978 /* 979 * Only change the c/mtime if we are changing the size or we are 980 * explicitly asked to change it. This handles the semantic difference 981 * between truncate() and ftruncate() as implemented in the VFS. 982 * 983 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a 984 * special case where we need to update the times despite not having 985 * these flags set. For all other operations the VFS set these flags 986 * explicitly if it wants a timestamp update. 987 */ 988 if (newsize != oldsize && 989 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { 990 iattr->ia_ctime = iattr->ia_mtime = 991 current_time(inode); 992 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 993 } 994 995 /* 996 * The first thing we do is set the size to new_size permanently on 997 * disk. This way we don't have to worry about anyone ever being able 998 * to look at the data being freed even in the face of a crash. 999 * What we're getting around here is the case where we free a block, it 1000 * is allocated to another file, it is written to, and then we crash. 1001 * If the new data gets written to the file but the log buffers 1002 * containing the free and reallocation don't, then we'd end up with 1003 * garbage in the blocks being freed. As long as we make the new size 1004 * permanent before actually freeing any blocks it doesn't matter if 1005 * they get written to. 1006 */ 1007 ip->i_d.di_size = newsize; 1008 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1009 1010 if (newsize <= oldsize) { 1011 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); 1012 if (error) 1013 goto out_trans_cancel; 1014 1015 /* 1016 * Truncated "down", so we're removing references to old data 1017 * here - if we delay flushing for a long time, we expose 1018 * ourselves unduly to the notorious NULL files problem. So, 1019 * we mark this inode and flush it when the file is closed, 1020 * and do not wait the usual (long) time for writeout. 1021 */ 1022 xfs_iflags_set(ip, XFS_ITRUNCATED); 1023 1024 /* A truncate down always removes post-EOF blocks. */ 1025 xfs_inode_clear_eofblocks_tag(ip); 1026 } 1027 1028 if (iattr->ia_valid & ATTR_MODE) 1029 xfs_setattr_mode(ip, iattr); 1030 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) 1031 xfs_setattr_time(ip, iattr); 1032 1033 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1034 1035 XFS_STATS_INC(mp, xs_ig_attrchg); 1036 1037 if (mp->m_flags & XFS_MOUNT_WSYNC) 1038 xfs_trans_set_sync(tp); 1039 1040 error = xfs_trans_commit(tp); 1041 out_unlock: 1042 if (lock_flags) 1043 xfs_iunlock(ip, lock_flags); 1044 return error; 1045 1046 out_trans_cancel: 1047 xfs_trans_cancel(tp); 1048 goto out_unlock; 1049 } 1050 1051 int 1052 xfs_vn_setattr_size( 1053 struct dentry *dentry, 1054 struct iattr *iattr) 1055 { 1056 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1057 int error; 1058 1059 trace_xfs_setattr(ip); 1060 1061 error = xfs_vn_change_ok(dentry, iattr); 1062 if (error) 1063 return error; 1064 return xfs_setattr_size(ip, iattr); 1065 } 1066 1067 STATIC int 1068 xfs_vn_setattr( 1069 struct dentry *dentry, 1070 struct iattr *iattr) 1071 { 1072 int error; 1073 1074 if (iattr->ia_valid & ATTR_SIZE) { 1075 struct inode *inode = d_inode(dentry); 1076 struct xfs_inode *ip = XFS_I(inode); 1077 uint iolock; 1078 1079 xfs_ilock(ip, XFS_MMAPLOCK_EXCL); 1080 iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 1081 1082 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 1083 if (error) { 1084 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); 1085 return error; 1086 } 1087 1088 error = xfs_vn_setattr_size(dentry, iattr); 1089 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); 1090 } else { 1091 error = xfs_vn_setattr_nonsize(dentry, iattr); 1092 } 1093 1094 return error; 1095 } 1096 1097 STATIC int 1098 xfs_vn_update_time( 1099 struct inode *inode, 1100 struct timespec64 *now, 1101 int flags) 1102 { 1103 struct xfs_inode *ip = XFS_I(inode); 1104 struct xfs_mount *mp = ip->i_mount; 1105 int log_flags = XFS_ILOG_TIMESTAMP; 1106 struct xfs_trans *tp; 1107 int error; 1108 1109 trace_xfs_update_time(ip); 1110 1111 if (inode->i_sb->s_flags & SB_LAZYTIME) { 1112 if (!((flags & S_VERSION) && 1113 inode_maybe_inc_iversion(inode, false))) 1114 return generic_update_time(inode, now, flags); 1115 1116 /* Capture the iversion update that just occurred */ 1117 log_flags |= XFS_ILOG_CORE; 1118 } 1119 1120 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); 1121 if (error) 1122 return error; 1123 1124 xfs_ilock(ip, XFS_ILOCK_EXCL); 1125 if (flags & S_CTIME) 1126 inode->i_ctime = *now; 1127 if (flags & S_MTIME) 1128 inode->i_mtime = *now; 1129 if (flags & S_ATIME) 1130 inode->i_atime = *now; 1131 1132 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 1133 xfs_trans_log_inode(tp, ip, log_flags); 1134 return xfs_trans_commit(tp); 1135 } 1136 1137 STATIC int 1138 xfs_vn_fiemap( 1139 struct inode *inode, 1140 struct fiemap_extent_info *fieinfo, 1141 u64 start, 1142 u64 length) 1143 { 1144 int error; 1145 1146 xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); 1147 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { 1148 fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR; 1149 error = iomap_fiemap(inode, fieinfo, start, length, 1150 &xfs_xattr_iomap_ops); 1151 } else { 1152 error = iomap_fiemap(inode, fieinfo, start, length, 1153 &xfs_read_iomap_ops); 1154 } 1155 xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); 1156 1157 return error; 1158 } 1159 1160 STATIC int 1161 xfs_vn_tmpfile( 1162 struct inode *dir, 1163 struct dentry *dentry, 1164 umode_t mode) 1165 { 1166 return xfs_generic_create(dir, dentry, mode, 0, true); 1167 } 1168 1169 static const struct inode_operations xfs_inode_operations = { 1170 .get_acl = xfs_get_acl, 1171 .set_acl = xfs_set_acl, 1172 .getattr = xfs_vn_getattr, 1173 .setattr = xfs_vn_setattr, 1174 .listxattr = xfs_vn_listxattr, 1175 .fiemap = xfs_vn_fiemap, 1176 .update_time = xfs_vn_update_time, 1177 }; 1178 1179 static const struct inode_operations xfs_dir_inode_operations = { 1180 .create = xfs_vn_create, 1181 .lookup = xfs_vn_lookup, 1182 .link = xfs_vn_link, 1183 .unlink = xfs_vn_unlink, 1184 .symlink = xfs_vn_symlink, 1185 .mkdir = xfs_vn_mkdir, 1186 /* 1187 * Yes, XFS uses the same method for rmdir and unlink. 1188 * 1189 * There are some subtile differences deeper in the code, 1190 * but we use S_ISDIR to check for those. 1191 */ 1192 .rmdir = xfs_vn_unlink, 1193 .mknod = xfs_vn_mknod, 1194 .rename = xfs_vn_rename, 1195 .get_acl = xfs_get_acl, 1196 .set_acl = xfs_set_acl, 1197 .getattr = xfs_vn_getattr, 1198 .setattr = xfs_vn_setattr, 1199 .listxattr = xfs_vn_listxattr, 1200 .update_time = xfs_vn_update_time, 1201 .tmpfile = xfs_vn_tmpfile, 1202 }; 1203 1204 static const struct inode_operations xfs_dir_ci_inode_operations = { 1205 .create = xfs_vn_create, 1206 .lookup = xfs_vn_ci_lookup, 1207 .link = xfs_vn_link, 1208 .unlink = xfs_vn_unlink, 1209 .symlink = xfs_vn_symlink, 1210 .mkdir = xfs_vn_mkdir, 1211 /* 1212 * Yes, XFS uses the same method for rmdir and unlink. 1213 * 1214 * There are some subtile differences deeper in the code, 1215 * but we use S_ISDIR to check for those. 1216 */ 1217 .rmdir = xfs_vn_unlink, 1218 .mknod = xfs_vn_mknod, 1219 .rename = xfs_vn_rename, 1220 .get_acl = xfs_get_acl, 1221 .set_acl = xfs_set_acl, 1222 .getattr = xfs_vn_getattr, 1223 .setattr = xfs_vn_setattr, 1224 .listxattr = xfs_vn_listxattr, 1225 .update_time = xfs_vn_update_time, 1226 .tmpfile = xfs_vn_tmpfile, 1227 }; 1228 1229 static const struct inode_operations xfs_symlink_inode_operations = { 1230 .get_link = xfs_vn_get_link, 1231 .getattr = xfs_vn_getattr, 1232 .setattr = xfs_vn_setattr, 1233 .listxattr = xfs_vn_listxattr, 1234 .update_time = xfs_vn_update_time, 1235 }; 1236 1237 static const struct inode_operations xfs_inline_symlink_inode_operations = { 1238 .get_link = xfs_vn_get_link_inline, 1239 .getattr = xfs_vn_getattr, 1240 .setattr = xfs_vn_setattr, 1241 .listxattr = xfs_vn_listxattr, 1242 .update_time = xfs_vn_update_time, 1243 }; 1244 1245 /* Figure out if this file actually supports DAX. */ 1246 static bool 1247 xfs_inode_supports_dax( 1248 struct xfs_inode *ip) 1249 { 1250 struct xfs_mount *mp = ip->i_mount; 1251 1252 /* Only supported on regular files. */ 1253 if (!S_ISREG(VFS_I(ip)->i_mode)) 1254 return false; 1255 1256 /* Only supported on non-reflinked files. */ 1257 if (xfs_is_reflink_inode(ip)) 1258 return false; 1259 1260 /* Block size must match page size */ 1261 if (mp->m_sb.sb_blocksize != PAGE_SIZE) 1262 return false; 1263 1264 /* Device has to support DAX too. */ 1265 return xfs_inode_buftarg(ip)->bt_daxdev != NULL; 1266 } 1267 1268 static bool 1269 xfs_inode_should_enable_dax( 1270 struct xfs_inode *ip) 1271 { 1272 if (!IS_ENABLED(CONFIG_FS_DAX)) 1273 return false; 1274 if (ip->i_mount->m_flags & XFS_MOUNT_DAX_NEVER) 1275 return false; 1276 if (!xfs_inode_supports_dax(ip)) 1277 return false; 1278 if (ip->i_mount->m_flags & XFS_MOUNT_DAX_ALWAYS) 1279 return true; 1280 if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX) 1281 return true; 1282 return false; 1283 } 1284 1285 void 1286 xfs_diflags_to_iflags( 1287 struct xfs_inode *ip, 1288 bool init) 1289 { 1290 struct inode *inode = VFS_I(ip); 1291 unsigned int xflags = xfs_ip2xflags(ip); 1292 unsigned int flags = 0; 1293 1294 ASSERT(!(IS_DAX(inode) && init)); 1295 1296 if (xflags & FS_XFLAG_IMMUTABLE) 1297 flags |= S_IMMUTABLE; 1298 if (xflags & FS_XFLAG_APPEND) 1299 flags |= S_APPEND; 1300 if (xflags & FS_XFLAG_SYNC) 1301 flags |= S_SYNC; 1302 if (xflags & FS_XFLAG_NOATIME) 1303 flags |= S_NOATIME; 1304 if (init && xfs_inode_should_enable_dax(ip)) 1305 flags |= S_DAX; 1306 1307 /* 1308 * S_DAX can only be set during inode initialization and is never set by 1309 * the VFS, so we cannot mask off S_DAX in i_flags. 1310 */ 1311 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | S_NOATIME); 1312 inode->i_flags |= flags; 1313 } 1314 1315 /* 1316 * Initialize the Linux inode. 1317 * 1318 * When reading existing inodes from disk this is called directly from xfs_iget, 1319 * when creating a new inode it is called from xfs_ialloc after setting up the 1320 * inode. These callers have different criteria for clearing XFS_INEW, so leave 1321 * it up to the caller to deal with unlocking the inode appropriately. 1322 */ 1323 void 1324 xfs_setup_inode( 1325 struct xfs_inode *ip) 1326 { 1327 struct inode *inode = &ip->i_vnode; 1328 gfp_t gfp_mask; 1329 1330 inode->i_ino = ip->i_ino; 1331 inode->i_state = I_NEW; 1332 1333 inode_sb_list_add(inode); 1334 /* make the inode look hashed for the writeback code */ 1335 inode_fake_hash(inode); 1336 1337 i_size_write(inode, ip->i_d.di_size); 1338 xfs_diflags_to_iflags(ip, true); 1339 1340 if (S_ISDIR(inode->i_mode)) { 1341 /* 1342 * We set the i_rwsem class here to avoid potential races with 1343 * lockdep_annotate_inode_mutex_key() reinitialising the lock 1344 * after a filehandle lookup has already found the inode in 1345 * cache before it has been unlocked via unlock_new_inode(). 1346 */ 1347 lockdep_set_class(&inode->i_rwsem, 1348 &inode->i_sb->s_type->i_mutex_dir_key); 1349 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); 1350 } else { 1351 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); 1352 } 1353 1354 /* 1355 * Ensure all page cache allocations are done from GFP_NOFS context to 1356 * prevent direct reclaim recursion back into the filesystem and blowing 1357 * stacks or deadlocking. 1358 */ 1359 gfp_mask = mapping_gfp_mask(inode->i_mapping); 1360 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); 1361 1362 /* 1363 * If there is no attribute fork no ACL can exist on this inode, 1364 * and it can't have any file capabilities attached to it either. 1365 */ 1366 if (!XFS_IFORK_Q(ip)) { 1367 inode_has_no_xattr(inode); 1368 cache_no_acl(inode); 1369 } 1370 } 1371 1372 void 1373 xfs_setup_iops( 1374 struct xfs_inode *ip) 1375 { 1376 struct inode *inode = &ip->i_vnode; 1377 1378 switch (inode->i_mode & S_IFMT) { 1379 case S_IFREG: 1380 inode->i_op = &xfs_inode_operations; 1381 inode->i_fop = &xfs_file_operations; 1382 if (IS_DAX(inode)) 1383 inode->i_mapping->a_ops = &xfs_dax_aops; 1384 else 1385 inode->i_mapping->a_ops = &xfs_address_space_operations; 1386 break; 1387 case S_IFDIR: 1388 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) 1389 inode->i_op = &xfs_dir_ci_inode_operations; 1390 else 1391 inode->i_op = &xfs_dir_inode_operations; 1392 inode->i_fop = &xfs_dir_file_operations; 1393 break; 1394 case S_IFLNK: 1395 if (ip->i_df.if_flags & XFS_IFINLINE) 1396 inode->i_op = &xfs_inline_symlink_inode_operations; 1397 else 1398 inode->i_op = &xfs_symlink_inode_operations; 1399 break; 1400 default: 1401 inode->i_op = &xfs_inode_operations; 1402 init_special_inode(inode, inode->i_mode, inode->i_rdev); 1403 break; 1404 } 1405 } 1406