module/zfs/zpl_inode.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2011, Lawrence Livermore National Security, LLC.
  23  * Copyright (c) 2015 by Chunwei Chen. All rights reserved.
  24  */
  25
  26
  27 #include <sys/zfs_ctldir.h>
  28 #include <sys/zfs_vfsops.h>
  29 #include <sys/zfs_vnops.h>
  30 #include <sys/zfs_znode.h>
  31 #include <sys/dmu_objset.h>
  32 #include <sys/vfs.h>
  33 #include <sys/zpl.h>
  34 #include <sys/file.h>
  35
  36
  37 static struct dentry *
  38 #ifdef HAVE_LOOKUP_NAMEIDATA
  39 zpl_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
  40 #else
  41 zpl_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
  42 #endif
  43 {
  44         cred_t *cr = CRED();
  45         struct inode *ip;
  46         int error;
  47         fstrans_cookie_t cookie;
  48         pathname_t *ppn = NULL;
  49         pathname_t pn;
  50         int zfs_flags = 0;
  51         zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info;
  52
  53         if (dlen(dentry) >= ZAP_MAXNAMELEN)
  54                 return (ERR_PTR(-ENAMETOOLONG));
  55
  56         crhold(cr);
  57         cookie = spl_fstrans_mark();
  58
  59         /* If we are a case insensitive fs, we need the real name */
  60         if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) {
  61                 zfs_flags = FIGNORECASE;
  62                 pn_alloc(&pn);
  63                 ppn = &pn;
  64         }
  65
  66         error = -zfs_lookup(dir, dname(dentry), &ip, zfs_flags, cr, NULL, ppn);
  67         spl_fstrans_unmark(cookie);
  68         ASSERT3S(error, <=, 0);
  69         crfree(cr);
  70
  71         spin_lock(&dentry->d_lock);
  72         dentry->d_time = jiffies;
  73 #ifndef HAVE_S_D_OP
  74         d_set_d_op(dentry, &zpl_dentry_operations);
  75 #endif /* HAVE_S_D_OP */
  76         spin_unlock(&dentry->d_lock);
  77
  78         if (error) {
  79                 /*
  80                  * If we have a case sensitive fs, we do not want to
  81                  * insert negative entries, so return NULL for ENOENT.
  82                  * Fall through if the error is not ENOENT. Also free memory.
  83                  */
  84                 if (ppn) {
  85                         pn_free(ppn);
  86                         if (error == -ENOENT)
  87                                 return (NULL);
  88                 }
  89
  90                 if (error == -ENOENT)
  91                         return (d_splice_alias(NULL, dentry));
  92                 else
  93                         return (ERR_PTR(error));
  94         }
  95
  96         /*
  97          * If we are case insensitive, call the correct function
  98          * to install the name.
  99          */
 100         if (ppn) {
 101                 struct dentry *new_dentry;
 102                 struct qstr ci_name;
 103
 104                 if (strcmp(dname(dentry), pn.pn_buf) == 0) {
 105                         new_dentry = d_splice_alias(ip,  dentry);
 106                 } else {
 107                         ci_name.name = pn.pn_buf;
 108                         ci_name.len = strlen(pn.pn_buf);
 109                         new_dentry = d_add_ci(dentry, ip, &ci_name);
 110                 }
 111                 pn_free(ppn);
 112                 return (new_dentry);
 113         } else {
 114                 return (d_splice_alias(ip, dentry));
 115         }
 116 }
 117
 118 void
 119 zpl_vap_init(vattr_t *vap, struct inode *dir, zpl_umode_t mode, cred_t *cr)
 120 {
 121         vap->va_mask = ATTR_MODE;
 122         vap->va_mode = mode;
 123         vap->va_uid = crgetfsuid(cr);
 124
 125         if (dir && dir->i_mode & S_ISGID) {
 126                 vap->va_gid = KGID_TO_SGID(dir->i_gid);
 127                 if (S_ISDIR(mode))
 128                         vap->va_mode |= S_ISGID;
 129         } else {
 130                 vap->va_gid = crgetfsgid(cr);
 131         }
 132 }
 133
 134 static int
 135 #ifdef HAVE_CREATE_NAMEIDATA
 136 zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
 137     struct nameidata *nd)
 138 #else
 139 zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
 140     bool flag)
 141 #endif
 142 {
 143         cred_t *cr = CRED();
 144         struct inode *ip;
 145         vattr_t *vap;
 146         int error;
 147         fstrans_cookie_t cookie;
 148
 149         crhold(cr);
 150         vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP);
 151         zpl_vap_init(vap, dir, mode, cr);
 152
 153         cookie = spl_fstrans_mark();
 154         error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL);
 155         if (error == 0) {
 156                 d_instantiate(dentry, ip);
 157
 158                 error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
 159                 if (error == 0)
 160                         error = zpl_init_acl(ip, dir);
 161
 162                 if (error)
 163                         (void) zfs_remove(dir, dname(dentry), cr, 0);
 164         }
 165
 166         spl_fstrans_unmark(cookie);
 167         kmem_free(vap, sizeof (vattr_t));
 168         crfree(cr);
 169         ASSERT3S(error, <=, 0);
 170
 171         return (error);
 172 }
 173
 174 static int
 175 zpl_mknod(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
 176     dev_t rdev)
 177 {
 178         cred_t *cr = CRED();
 179         struct inode *ip;
 180         vattr_t *vap;
 181         int error;
 182         fstrans_cookie_t cookie;
 183
 184         /*
 185          * We currently expect Linux to supply rdev=0 for all sockets
 186          * and fifos, but we want to know if this behavior ever changes.
 187          */
 188         if (S_ISSOCK(mode) || S_ISFIFO(mode))
 189                 ASSERT(rdev == 0);
 190
 191         crhold(cr);
 192         vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP);
 193         zpl_vap_init(vap, dir, mode, cr);
 194         vap->va_rdev = rdev;
 195
 196         cookie = spl_fstrans_mark();
 197         error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL);
 198         if (error == 0) {
 199                 d_instantiate(dentry, ip);
 200
 201                 error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
 202                 if (error == 0)
 203                         error = zpl_init_acl(ip, dir);
 204
 205                 if (error)
 206                         (void) zfs_remove(dir, dname(dentry), cr, 0);
 207         }
 208
 209         spl_fstrans_unmark(cookie);
 210         kmem_free(vap, sizeof (vattr_t));
 211         crfree(cr);
 212         ASSERT3S(error, <=, 0);
 213
 214         return (error);
 215 }
 216
 217 #ifdef HAVE_TMPFILE
 218 static int
 219 zpl_tmpfile(struct inode *dir, struct dentry *dentry, zpl_umode_t mode)
 220 {
 221         cred_t *cr = CRED();
 222         struct inode *ip;
 223         vattr_t *vap;
 224         int error;
 225         fstrans_cookie_t cookie;
 226
 227         crhold(cr);
 228         vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP);
 229         zpl_vap_init(vap, dir, mode, cr);
 230
 231         cookie = spl_fstrans_mark();
 232         error = -zfs_tmpfile(dir, vap, 0, mode, &ip, cr, 0, NULL);
 233         if (error == 0) {
 234                 /* d_tmpfile will do drop_nlink, so we should set it first */
 235                 set_nlink(ip, 1);
 236                 d_tmpfile(dentry, ip);
 237
 238                 error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
 239                 if (error == 0)
 240                         error = zpl_init_acl(ip, dir);
 241                 /*
 242                  * don't need to handle error here, file is already in
 243                  * unlinked set.
 244                  */
 245         }
 246
 247         spl_fstrans_unmark(cookie);
 248         kmem_free(vap, sizeof (vattr_t));
 249         crfree(cr);
 250         ASSERT3S(error, <=, 0);
 251
 252         return (error);
 253 }
 254 #endif
 255
 256 static int
 257 zpl_unlink(struct inode *dir, struct dentry *dentry)
 258 {
 259         cred_t *cr = CRED();
 260         int error;
 261         fstrans_cookie_t cookie;
 262         zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info;
 263
 264         crhold(cr);
 265         cookie = spl_fstrans_mark();
 266         error = -zfs_remove(dir, dname(dentry), cr, 0);
 267
 268         /*
 269          * For a CI FS we must invalidate the dentry to prevent the
 270          * creation of negative entries.
 271          */
 272         if (error == 0 && zfsvfs->z_case == ZFS_CASE_INSENSITIVE)
 273                 d_invalidate(dentry);
 274
 275         spl_fstrans_unmark(cookie);
 276         crfree(cr);
 277         ASSERT3S(error, <=, 0);
 278
 279         return (error);
 280 }
 281
 282 static int
 283 zpl_mkdir(struct inode *dir, struct dentry *dentry, zpl_umode_t mode)
 284 {
 285         cred_t *cr = CRED();
 286         vattr_t *vap;
 287         struct inode *ip;
 288         int error;
 289         fstrans_cookie_t cookie;
 290
 291         crhold(cr);
 292         vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP);
 293         zpl_vap_init(vap, dir, mode | S_IFDIR, cr);
 294
 295         cookie = spl_fstrans_mark();
 296         error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
 297         if (error == 0) {
 298                 d_instantiate(dentry, ip);
 299
 300                 error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
 301                 if (error == 0)
 302                         error = zpl_init_acl(ip, dir);
 303
 304                 if (error)
 305                         (void) zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
 306         }
 307
 308         spl_fstrans_unmark(cookie);
 309         kmem_free(vap, sizeof (vattr_t));
 310         crfree(cr);
 311         ASSERT3S(error, <=, 0);
 312
 313         return (error);
 314 }
 315
 316 static int
 317 zpl_rmdir(struct inode *dir, struct dentry *dentry)
 318 {
 319         cred_t *cr = CRED();
 320         int error;
 321         fstrans_cookie_t cookie;
 322         zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info;
 323
 324         crhold(cr);
 325         cookie = spl_fstrans_mark();
 326         error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
 327
 328         /*
 329          * For a CI FS we must invalidate the dentry to prevent the
 330          * creation of negative entries.
 331          */
 332         if (error == 0 && zfsvfs->z_case == ZFS_CASE_INSENSITIVE)
 333                 d_invalidate(dentry);
 334
 335         spl_fstrans_unmark(cookie);
 336         crfree(cr);
 337         ASSERT3S(error, <=, 0);
 338
 339         return (error);
 340 }
 341
 342 static int
 343 zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask,
 344     unsigned int query_flags)
 345 {
 346         int error;
 347         fstrans_cookie_t cookie;
 348
 349         cookie = spl_fstrans_mark();
 350
 351         /*
 352          * XXX request_mask and query_flags currently ignored.
 353          */
 354
 355         error = -zfs_getattr_fast(path->dentry->d_inode, stat);
 356         spl_fstrans_unmark(cookie);
 357         ASSERT3S(error, <=, 0);
 358
 359         return (error);
 360 }
 361 ZPL_GETATTR_WRAPPER(zpl_getattr);
 362
 363 static int
 364 zpl_setattr(struct dentry *dentry, struct iattr *ia)
 365 {
 366         struct inode *ip = dentry->d_inode;
 367         cred_t *cr = CRED();
 368         vattr_t *vap;
 369         int error;
 370         fstrans_cookie_t cookie;
 371
 372         error = setattr_prepare(dentry, ia);
 373         if (error)
 374                 return (error);
 375
 376         crhold(cr);
 377         vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP);
 378         vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK;
 379         vap->va_mode = ia->ia_mode;
 380         vap->va_uid = KUID_TO_SUID(ia->ia_uid);
 381         vap->va_gid = KGID_TO_SGID(ia->ia_gid);
 382         vap->va_size = ia->ia_size;
 383         vap->va_atime = ia->ia_atime;
 384         vap->va_mtime = ia->ia_mtime;
 385         vap->va_ctime = ia->ia_ctime;
 386
 387         if (vap->va_mask & ATTR_ATIME)
 388                 ip->i_atime = timespec_trunc(ia->ia_atime,
 389                     ip->i_sb->s_time_gran);
 390
 391         cookie = spl_fstrans_mark();
 392         error = -zfs_setattr(ip, vap, 0, cr);
 393         if (!error && (ia->ia_valid & ATTR_MODE))
 394                 error = zpl_chmod_acl(ip);
 395
 396         spl_fstrans_unmark(cookie);
 397         kmem_free(vap, sizeof (vattr_t));
 398         crfree(cr);
 399         ASSERT3S(error, <=, 0);
 400
 401         return (error);
 402 }
 403
 404 static int
 405 zpl_rename2(struct inode *sdip, struct dentry *sdentry,
 406     struct inode *tdip, struct dentry *tdentry, unsigned int flags)
 407 {
 408         cred_t *cr = CRED();
 409         int error;
 410         fstrans_cookie_t cookie;
 411
 412         /* We don't have renameat2(2) support */
 413         if (flags)
 414                 return (-EINVAL);
 415
 416         crhold(cr);
 417         cookie = spl_fstrans_mark();
 418         error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0);
 419         spl_fstrans_unmark(cookie);
 420         crfree(cr);
 421         ASSERT3S(error, <=, 0);
 422
 423         return (error);
 424 }
 425
 426 #ifndef HAVE_RENAME_WANTS_FLAGS
 427 static int
 428 zpl_rename(struct inode *sdip, struct dentry *sdentry,
 429     struct inode *tdip, struct dentry *tdentry)
 430 {
 431         return (zpl_rename2(sdip, sdentry, tdip, tdentry, 0));
 432 }
 433 #endif
 434
 435 static int
 436 zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
 437 {
 438         cred_t *cr = CRED();
 439         vattr_t *vap;
 440         struct inode *ip;
 441         int error;
 442         fstrans_cookie_t cookie;
 443
 444         crhold(cr);
 445         vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP);
 446         zpl_vap_init(vap, dir, S_IFLNK | S_IRWXUGO, cr);
 447
 448         cookie = spl_fstrans_mark();
 449         error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
 450         if (error == 0) {
 451                 d_instantiate(dentry, ip);
 452
 453                 error = zpl_xattr_security_init(ip, dir, &dentry->d_name);
 454                 if (error)
 455                         (void) zfs_remove(dir, dname(dentry), cr, 0);
 456         }
 457
 458         spl_fstrans_unmark(cookie);
 459         kmem_free(vap, sizeof (vattr_t));
 460         crfree(cr);
 461         ASSERT3S(error, <=, 0);
 462
 463         return (error);
 464 }
 465
 466 #if defined(HAVE_PUT_LINK_COOKIE)
 467 static void
 468 zpl_put_link(struct inode *unused, void *cookie)
 469 {
 470         kmem_free(cookie, MAXPATHLEN);
 471 }
 472 #elif defined(HAVE_PUT_LINK_NAMEIDATA)
 473 static void
 474 zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
 475 {
 476         const char *link = nd_get_link(nd);
 477
 478         if (!IS_ERR(link))
 479                 kmem_free(link, MAXPATHLEN);
 480 }
 481 #elif defined(HAVE_PUT_LINK_DELAYED)
 482 static void
 483 zpl_put_link(void *ptr)
 484 {
 485         kmem_free(ptr, MAXPATHLEN);
 486 }
 487 #endif
 488
 489 static int
 490 zpl_get_link_common(struct dentry *dentry, struct inode *ip, char **link)
 491 {
 492         fstrans_cookie_t cookie;
 493         cred_t *cr = CRED();
 494         struct iovec iov;
 495         uio_t uio;
 496         int error;
 497
 498         crhold(cr);
 499         *link = NULL;
 500         iov.iov_len = MAXPATHLEN;
 501         iov.iov_base = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
 502
 503         uio.uio_iov = &iov;
 504         uio.uio_iovcnt = 1;
 505         uio.uio_skip = 0;
 506         uio.uio_resid = (MAXPATHLEN - 1);
 507         uio.uio_segflg = UIO_SYSSPACE;
 508
 509         cookie = spl_fstrans_mark();
 510         error = -zfs_readlink(ip, &uio, cr);
 511         spl_fstrans_unmark(cookie);
 512         crfree(cr);
 513
 514         if (error)
 515                 kmem_free(iov.iov_base, MAXPATHLEN);
 516         else
 517                 *link = iov.iov_base;
 518
 519         return (error);
 520 }
 521
 522 #if defined(HAVE_GET_LINK_DELAYED)
 523 const char *
 524 zpl_get_link(struct dentry *dentry, struct inode *inode,
 525     struct delayed_call *done)
 526 {
 527         char *link = NULL;
 528         int error;
 529
 530         if (!dentry)
 531                 return (ERR_PTR(-ECHILD));
 532
 533         error = zpl_get_link_common(dentry, inode, &link);
 534         if (error)
 535                 return (ERR_PTR(error));
 536
 537         set_delayed_call(done, zpl_put_link, link);
 538
 539         return (link);
 540 }
 541 #elif defined(HAVE_GET_LINK_COOKIE)
 542 const char *
 543 zpl_get_link(struct dentry *dentry, struct inode *inode, void **cookie)
 544 {
 545         char *link = NULL;
 546         int error;
 547
 548         if (!dentry)
 549                 return (ERR_PTR(-ECHILD));
 550
 551         error = zpl_get_link_common(dentry, inode, &link);
 552         if (error)
 553                 return (ERR_PTR(error));
 554
 555         return (*cookie = link);
 556 }
 557 #elif defined(HAVE_FOLLOW_LINK_COOKIE)
 558 const char *
 559 zpl_follow_link(struct dentry *dentry, void **cookie)
 560 {
 561         char *link = NULL;
 562         int error;
 563
 564         error = zpl_get_link_common(dentry, dentry->d_inode, &link);
 565         if (error)
 566                 return (ERR_PTR(error));
 567
 568         return (*cookie = link);
 569 }
 570 #elif defined(HAVE_FOLLOW_LINK_NAMEIDATA)
 571 static void *
 572 zpl_follow_link(struct dentry *dentry, struct nameidata *nd)
 573 {
 574         char *link = NULL;
 575         int error;
 576
 577         error = zpl_get_link_common(dentry, dentry->d_inode, &link);
 578         if (error)
 579                 nd_set_link(nd, ERR_PTR(error));
 580         else
 581                 nd_set_link(nd, link);
 582
 583         return (NULL);
 584 }
 585 #endif
 586
 587 static int
 588 zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
 589 {
 590         cred_t *cr = CRED();
 591         struct inode *ip = old_dentry->d_inode;
 592         int error;
 593         fstrans_cookie_t cookie;
 594
 595         if (ip->i_nlink >= ZFS_LINK_MAX)
 596                 return (-EMLINK);
 597
 598         crhold(cr);
 599         ip->i_ctime = current_time(ip);
 600         igrab(ip); /* Use ihold() if available */
 601
 602         cookie = spl_fstrans_mark();
 603         error = -zfs_link(dir, ip, dname(dentry), cr, 0);
 604         if (error) {
 605                 iput(ip);
 606                 goto out;
 607         }
 608
 609         d_instantiate(dentry, ip);
 610 out:
 611         spl_fstrans_unmark(cookie);
 612         crfree(cr);
 613         ASSERT3S(error, <=, 0);
 614
 615         return (error);
 616 }
 617
 618 #ifdef HAVE_INODE_TRUNCATE_RANGE
 619 static void
 620 zpl_truncate_range(struct inode *ip, loff_t start, loff_t end)
 621 {
 622         cred_t *cr = CRED();
 623         flock64_t bf;
 624         fstrans_cookie_t cookie;
 625
 626         ASSERT3S(start, <=, end);
 627
 628         /*
 629          * zfs_freesp() will interpret (len == 0) as meaning "truncate until
 630          * the end of the file". We don't want that.
 631          */
 632         if (start == end)
 633                 return;
 634
 635         crhold(cr);
 636
 637         bf.l_type = F_WRLCK;
 638         bf.l_whence = 0;
 639         bf.l_start = start;
 640         bf.l_len = end - start;
 641         bf.l_pid = 0;
 642         cookie = spl_fstrans_mark();
 643         zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr);
 644         spl_fstrans_unmark(cookie);
 645
 646         crfree(cr);
 647 }
 648 #endif /* HAVE_INODE_TRUNCATE_RANGE */
 649
 650 #ifdef HAVE_INODE_FALLOCATE
 651 static long
 652 zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len)
 653 {
 654         return (zpl_fallocate_common(ip, mode, offset, len));
 655 }
 656 #endif /* HAVE_INODE_FALLOCATE */
 657
 658 static int
 659 #ifdef HAVE_D_REVALIDATE_NAMEIDATA
 660 zpl_revalidate(struct dentry *dentry, struct nameidata *nd)
 661 {
 662         unsigned int flags = (nd ? nd->flags : 0);
 663 #else
 664 zpl_revalidate(struct dentry *dentry, unsigned int flags)
 665 {
 666 #endif /* HAVE_D_REVALIDATE_NAMEIDATA */
 667         /* CSTYLED */
 668         zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info;
 669         int error;
 670
 671         if (flags & LOOKUP_RCU)
 672                 return (-ECHILD);
 673
 674         /*
 675          * Automounted snapshots rely on periodic dentry revalidation
 676          * to defer snapshots from being automatically unmounted.
 677          */
 678         if (zfsvfs->z_issnap) {
 679                 if (time_after(jiffies, zfsvfs->z_snap_defer_time +
 680                     MAX(zfs_expire_snapshot * HZ / 2, HZ))) {
 681                         zfsvfs->z_snap_defer_time = jiffies;
 682                         zfsctl_snapshot_unmount_delay(zfsvfs->z_os->os_spa,
 683                             dmu_objset_id(zfsvfs->z_os), zfs_expire_snapshot);
 684                 }
 685         }
 686
 687         /*
 688          * After a rollback negative dentries created before the rollback
 689          * time must be invalidated.  Otherwise they can obscure files which
 690          * are only present in the rolled back dataset.
 691          */
 692         if (dentry->d_inode == NULL) {
 693                 spin_lock(&dentry->d_lock);
 694                 error = time_before(dentry->d_time, zfsvfs->z_rollback_time);
 695                 spin_unlock(&dentry->d_lock);
 696
 697                 if (error)
 698                         return (0);
 699         }
 700
 701         /*
 702          * The dentry may reference a stale inode if a mounted file system
 703          * was rolled back to a point in time where the object didn't exist.
 704          */
 705         if (dentry->d_inode && ITOZ(dentry->d_inode)->z_is_stale)
 706                 return (0);
 707
 708         return (1);
 709 }
 710
 711 const struct inode_operations zpl_inode_operations = {
 712         .setattr        = zpl_setattr,
 713         .getattr        = zpl_getattr,
 714 #ifdef HAVE_GENERIC_SETXATTR
 715         .setxattr       = generic_setxattr,
 716         .getxattr       = generic_getxattr,
 717         .removexattr    = generic_removexattr,
 718 #endif
 719         .listxattr      = zpl_xattr_list,
 720 #ifdef HAVE_INODE_TRUNCATE_RANGE
 721         .truncate_range = zpl_truncate_range,
 722 #endif /* HAVE_INODE_TRUNCATE_RANGE */
 723 #ifdef HAVE_INODE_FALLOCATE
 724         .fallocate      = zpl_fallocate,
 725 #endif /* HAVE_INODE_FALLOCATE */
 726 #if defined(CONFIG_FS_POSIX_ACL)
 727 #if defined(HAVE_SET_ACL)
 728         .set_acl        = zpl_set_acl,
 729 #endif
 730 #if defined(HAVE_GET_ACL)
 731         .get_acl        = zpl_get_acl,
 732 #elif defined(HAVE_CHECK_ACL)
 733         .check_acl      = zpl_check_acl,
 734 #elif defined(HAVE_PERMISSION)
 735         .permission     = zpl_permission,
 736 #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */
 737 #endif /* CONFIG_FS_POSIX_ACL */
 738 };
 739
 740 const struct inode_operations zpl_dir_inode_operations = {
 741         .create         = zpl_create,
 742         .lookup         = zpl_lookup,
 743         .link           = zpl_link,
 744         .unlink         = zpl_unlink,
 745         .symlink        = zpl_symlink,
 746         .mkdir          = zpl_mkdir,
 747         .rmdir          = zpl_rmdir,
 748         .mknod          = zpl_mknod,
 749 #ifdef HAVE_RENAME_WANTS_FLAGS
 750         .rename         = zpl_rename2,
 751 #else
 752         .rename         = zpl_rename,
 753 #endif
 754 #ifdef HAVE_TMPFILE
 755         .tmpfile        = zpl_tmpfile,
 756 #endif
 757         .setattr        = zpl_setattr,
 758         .getattr        = zpl_getattr,
 759 #ifdef HAVE_GENERIC_SETXATTR
 760         .setxattr       = generic_setxattr,
 761         .getxattr       = generic_getxattr,
 762         .removexattr    = generic_removexattr,
 763 #endif
 764         .listxattr      = zpl_xattr_list,
 765 #if defined(CONFIG_FS_POSIX_ACL)
 766 #if defined(HAVE_SET_ACL)
 767         .set_acl        = zpl_set_acl,
 768 #endif
 769 #if defined(HAVE_GET_ACL)
 770         .get_acl        = zpl_get_acl,
 771 #elif defined(HAVE_CHECK_ACL)
 772         .check_acl      = zpl_check_acl,
 773 #elif defined(HAVE_PERMISSION)
 774         .permission     = zpl_permission,
 775 #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */
 776 #endif /* CONFIG_FS_POSIX_ACL */
 777 };
 778
 779 const struct inode_operations zpl_symlink_inode_operations = {
 780 #ifdef HAVE_GENERIC_READLINK
 781         .readlink       = generic_readlink,
 782 #endif
 783 #if defined(HAVE_GET_LINK_DELAYED) || defined(HAVE_GET_LINK_COOKIE)
 784         .get_link       = zpl_get_link,
 785 #elif defined(HAVE_FOLLOW_LINK_COOKIE) || defined(HAVE_FOLLOW_LINK_NAMEIDATA)
 786         .follow_link    = zpl_follow_link,
 787 #endif
 788 #if defined(HAVE_PUT_LINK_COOKIE) || defined(HAVE_PUT_LINK_NAMEIDATA)
 789         .put_link       = zpl_put_link,
 790 #endif
 791         .setattr        = zpl_setattr,
 792         .getattr        = zpl_getattr,
 793 #ifdef HAVE_GENERIC_SETXATTR
 794         .setxattr       = generic_setxattr,
 795         .getxattr       = generic_getxattr,
 796         .removexattr    = generic_removexattr,
 797 #endif
 798         .listxattr      = zpl_xattr_list,
 799 };
 800
 801 const struct inode_operations zpl_special_inode_operations = {
 802         .setattr        = zpl_setattr,
 803         .getattr        = zpl_getattr,
 804 #ifdef HAVE_GENERIC_SETXATTR
 805         .setxattr       = generic_setxattr,
 806         .getxattr       = generic_getxattr,
 807         .removexattr    = generic_removexattr,
 808 #endif
 809         .listxattr      = zpl_xattr_list,
 810 #if defined(CONFIG_FS_POSIX_ACL)
 811 #if defined(HAVE_SET_ACL)
 812         .set_acl        = zpl_set_acl,
 813 #endif
 814 #if defined(HAVE_GET_ACL)
 815         .get_acl        = zpl_get_acl,
 816 #elif defined(HAVE_CHECK_ACL)
 817         .check_acl      = zpl_check_acl,
 818 #elif defined(HAVE_PERMISSION)
 819         .permission     = zpl_permission,
 820 #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */
 821 #endif /* CONFIG_FS_POSIX_ACL */
 822 };
 823
 824 dentry_operations_t zpl_dentry_operations = {
 825         .d_revalidate   = zpl_revalidate,
 826 };