Lines Matching +full:lower +full:- +full:case
1 // SPDX-License-Identifier: GPL-2.0-only
66 for (i = 0; i < oe->numlower; i++) in ovl_entry_stack_free()
67 dput(oe->lowerstack[i].dentry); in ovl_entry_stack_free()
77 struct ovl_entry *oe = dentry->d_fsdata; in ovl_dentry_release()
88 struct dentry *real = NULL, *lower; in ovl_d_real() local
107 lower = ovl_dentry_lowerdata(dentry); in ovl_d_real()
108 if (!lower) in ovl_d_real()
110 real = lower; in ovl_d_real()
119 __func__, dentry, inode ? inode->i_sb->s_id : "NULL", in ovl_d_real()
120 inode ? inode->i_ino : 0, real, in ovl_d_real()
121 real && d_inode(real) ? d_inode(real)->i_ino : 0); in ovl_d_real()
130 if (d->d_flags & DCACHE_OP_WEAK_REVALIDATE) in ovl_revalidate_real()
131 ret = d->d_op->d_weak_revalidate(d, flags); in ovl_revalidate_real()
132 } else if (d->d_flags & DCACHE_OP_REVALIDATE) { in ovl_revalidate_real()
133 ret = d->d_op->d_revalidate(d, flags); in ovl_revalidate_real()
137 ret = -ESTALE; in ovl_revalidate_real()
146 struct ovl_entry *oe = dentry->d_fsdata; in ovl_dentry_revalidate_common()
155 for (i = 0; ret > 0 && i < oe->numlower; i++) { in ovl_dentry_revalidate_common()
156 ret = ovl_revalidate_real(oe->lowerstack[i].dentry, flags, in ovl_dentry_revalidate_common()
188 oi->cache = NULL; in ovl_alloc_inode()
189 oi->redirect = NULL; in ovl_alloc_inode()
190 oi->version = 0; in ovl_alloc_inode()
191 oi->flags = 0; in ovl_alloc_inode()
192 oi->__upperdentry = NULL; in ovl_alloc_inode()
193 oi->lower = NULL; in ovl_alloc_inode()
194 oi->lowerdata = NULL; in ovl_alloc_inode()
195 mutex_init(&oi->lock); in ovl_alloc_inode()
197 return &oi->vfs_inode; in ovl_alloc_inode()
204 kfree(oi->redirect); in ovl_free_inode()
205 mutex_destroy(&oi->lock); in ovl_free_inode()
213 dput(oi->__upperdentry); in ovl_destroy_inode()
214 iput(oi->lower); in ovl_destroy_inode()
215 if (S_ISDIR(inode->i_mode)) in ovl_destroy_inode()
218 iput(oi->lowerdata); in ovl_destroy_inode()
226 iput(ofs->workbasedir_trap); in ovl_free_fs()
227 iput(ofs->indexdir_trap); in ovl_free_fs()
228 iput(ofs->workdir_trap); in ovl_free_fs()
229 dput(ofs->whiteout); in ovl_free_fs()
230 dput(ofs->indexdir); in ovl_free_fs()
231 dput(ofs->workdir); in ovl_free_fs()
232 if (ofs->workdir_locked) in ovl_free_fs()
233 ovl_inuse_unlock(ofs->workbasedir); in ovl_free_fs()
234 dput(ofs->workbasedir); in ovl_free_fs()
235 if (ofs->upperdir_locked) in ovl_free_fs()
236 ovl_inuse_unlock(ovl_upper_mnt(ofs)->mnt_root); in ovl_free_fs()
238 /* Hack! Reuse ofs->layers as a vfsmount array before freeing it */ in ovl_free_fs()
239 mounts = (struct vfsmount **) ofs->layers; in ovl_free_fs()
240 for (i = 0; i < ofs->numlayer; i++) { in ovl_free_fs()
241 iput(ofs->layers[i].trap); in ovl_free_fs()
242 mounts[i] = ofs->layers[i].mnt; in ovl_free_fs()
244 kern_unmount_array(mounts, ofs->numlayer); in ovl_free_fs()
245 kfree(ofs->layers); in ovl_free_fs()
246 for (i = 0; i < ofs->numfs; i++) in ovl_free_fs()
247 free_anon_bdev(ofs->fs[i].pseudo_dev); in ovl_free_fs()
248 kfree(ofs->fs); in ovl_free_fs()
250 kfree(ofs->config.lowerdir); in ovl_free_fs()
251 kfree(ofs->config.upperdir); in ovl_free_fs()
252 kfree(ofs->config.workdir); in ovl_free_fs()
253 kfree(ofs->config.redirect_mode); in ovl_free_fs()
254 if (ofs->creator_cred) in ovl_free_fs()
255 put_cred(ofs->creator_cred); in ovl_free_fs()
261 struct ovl_fs *ofs = sb->s_fs_info; in ovl_put_super()
269 struct ovl_fs *ofs = sb->s_fs_info; in ovl_sync_fs()
280 errseq_set(&sb->s_wb_err, -EIO); in ovl_sync_fs()
281 return -EIO; in ovl_sync_fs()
298 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_sync_fs()
300 down_read(&upper_sb->s_umount); in ovl_sync_fs()
302 up_read(&upper_sb->s_umount); in ovl_sync_fs()
317 struct ovl_fs *ofs = dentry->d_sb->s_fs_info; in ovl_statfs()
318 struct dentry *root_dentry = dentry->d_sb->s_root; in ovl_statfs()
326 buf->f_namelen = ofs->namelen; in ovl_statfs()
327 buf->f_type = OVERLAYFS_SUPER_MAGIC; in ovl_statfs()
336 return (!ovl_upper_mnt(ofs) || !ofs->workdir); in ovl_force_readonly()
363 struct super_block *sb = dentry->d_sb; in ovl_show_options()
364 struct ovl_fs *ofs = sb->s_fs_info; in ovl_show_options()
366 seq_show_option(m, "lowerdir", ofs->config.lowerdir); in ovl_show_options()
367 if (ofs->config.upperdir) { in ovl_show_options()
368 seq_show_option(m, "upperdir", ofs->config.upperdir); in ovl_show_options()
369 seq_show_option(m, "workdir", ofs->config.workdir); in ovl_show_options()
371 if (ofs->config.default_permissions) in ovl_show_options()
373 if (strcmp(ofs->config.redirect_mode, ovl_redirect_mode_def()) != 0) in ovl_show_options()
374 seq_printf(m, ",redirect_dir=%s", ofs->config.redirect_mode); in ovl_show_options()
375 if (ofs->config.index != ovl_index_def) in ovl_show_options()
376 seq_printf(m, ",index=%s", ofs->config.index ? "on" : "off"); in ovl_show_options()
377 if (ofs->config.nfs_export != ovl_nfs_export_def) in ovl_show_options()
378 seq_printf(m, ",nfs_export=%s", ofs->config.nfs_export ? in ovl_show_options()
380 if (ofs->config.xino != ovl_xino_def() && !ovl_same_fs(sb)) in ovl_show_options()
381 seq_printf(m, ",xino=%s", ovl_xino_str[ofs->config.xino]); in ovl_show_options()
382 if (ofs->config.metacopy != ovl_metacopy_def) in ovl_show_options()
384 ofs->config.metacopy ? "on" : "off"); in ovl_show_options()
385 if (ofs->config.ovl_volatile) in ovl_show_options()
387 if (ofs->config.override_creds != ovl_override_creds_def) in ovl_show_options()
389 ofs->config.override_creds ? "on" : "off"); in ovl_show_options()
395 struct ovl_fs *ofs = sb->s_fs_info; in ovl_remount()
400 return -EROFS; in ovl_remount()
403 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_remount()
405 down_read(&upper_sb->s_umount); in ovl_remount()
407 up_read(&upper_sb->s_umount); in ovl_remount()
494 config->redirect_dir = true; in ovl_parse_redirect_mode()
499 config->redirect_follow = true; in ovl_parse_redirect_mode()
501 config->redirect_follow = true; in ovl_parse_redirect_mode()
504 config->redirect_follow = true; in ovl_parse_redirect_mode()
508 return -EINVAL; in ovl_parse_redirect_mode()
521 config->redirect_mode = kstrdup(ovl_redirect_mode_def(), GFP_KERNEL); in ovl_parse_opt()
522 if (!config->redirect_mode) in ovl_parse_opt()
523 return -ENOMEM; in ovl_parse_opt()
524 config->override_creds = ovl_override_creds_def; in ovl_parse_opt()
535 case OPT_UPPERDIR: in ovl_parse_opt()
536 kfree(config->upperdir); in ovl_parse_opt()
537 config->upperdir = match_strdup(&args[0]); in ovl_parse_opt()
538 if (!config->upperdir) in ovl_parse_opt()
539 return -ENOMEM; in ovl_parse_opt()
542 case OPT_LOWERDIR: in ovl_parse_opt()
543 kfree(config->lowerdir); in ovl_parse_opt()
544 config->lowerdir = match_strdup(&args[0]); in ovl_parse_opt()
545 if (!config->lowerdir) in ovl_parse_opt()
546 return -ENOMEM; in ovl_parse_opt()
549 case OPT_WORKDIR: in ovl_parse_opt()
550 kfree(config->workdir); in ovl_parse_opt()
551 config->workdir = match_strdup(&args[0]); in ovl_parse_opt()
552 if (!config->workdir) in ovl_parse_opt()
553 return -ENOMEM; in ovl_parse_opt()
556 case OPT_DEFAULT_PERMISSIONS: in ovl_parse_opt()
557 config->default_permissions = true; in ovl_parse_opt()
560 case OPT_REDIRECT_DIR: in ovl_parse_opt()
561 kfree(config->redirect_mode); in ovl_parse_opt()
562 config->redirect_mode = match_strdup(&args[0]); in ovl_parse_opt()
563 if (!config->redirect_mode) in ovl_parse_opt()
564 return -ENOMEM; in ovl_parse_opt()
568 case OPT_INDEX_ON: in ovl_parse_opt()
569 config->index = true; in ovl_parse_opt()
573 case OPT_INDEX_OFF: in ovl_parse_opt()
574 config->index = false; in ovl_parse_opt()
578 case OPT_NFS_EXPORT_ON: in ovl_parse_opt()
579 config->nfs_export = true; in ovl_parse_opt()
583 case OPT_NFS_EXPORT_OFF: in ovl_parse_opt()
584 config->nfs_export = false; in ovl_parse_opt()
588 case OPT_XINO_ON: in ovl_parse_opt()
589 config->xino = OVL_XINO_ON; in ovl_parse_opt()
592 case OPT_XINO_OFF: in ovl_parse_opt()
593 config->xino = OVL_XINO_OFF; in ovl_parse_opt()
596 case OPT_XINO_AUTO: in ovl_parse_opt()
597 config->xino = OVL_XINO_AUTO; in ovl_parse_opt()
600 case OPT_METACOPY_ON: in ovl_parse_opt()
601 config->metacopy = true; in ovl_parse_opt()
605 case OPT_METACOPY_OFF: in ovl_parse_opt()
606 config->metacopy = false; in ovl_parse_opt()
610 case OPT_VOLATILE: in ovl_parse_opt()
611 config->ovl_volatile = true; in ovl_parse_opt()
614 case OPT_OVERRIDE_CREDS_ON: in ovl_parse_opt()
615 config->override_creds = true; in ovl_parse_opt()
618 case OPT_OVERRIDE_CREDS_OFF: in ovl_parse_opt()
619 config->override_creds = false; in ovl_parse_opt()
625 return -EINVAL; in ovl_parse_opt()
629 /* Workdir/index are useless in non-upper mount */ in ovl_parse_opt()
630 if (!config->upperdir) { in ovl_parse_opt()
631 if (config->workdir) { in ovl_parse_opt()
632 pr_info("option \"workdir=%s\" is useless in a non-upper mount, ignore\n", in ovl_parse_opt()
633 config->workdir); in ovl_parse_opt()
634 kfree(config->workdir); in ovl_parse_opt()
635 config->workdir = NULL; in ovl_parse_opt()
637 if (config->index && index_opt) { in ovl_parse_opt()
638 pr_info("option \"index=on\" is useless in a non-upper mount, ignore\n"); in ovl_parse_opt()
641 config->index = false; in ovl_parse_opt()
644 if (!config->upperdir && config->ovl_volatile) { in ovl_parse_opt()
645 pr_info("option \"volatile\" is meaningless in a non-upper mount, ignoring it.\n"); in ovl_parse_opt()
646 config->ovl_volatile = false; in ovl_parse_opt()
649 err = ovl_parse_redirect_mode(config, config->redirect_mode); in ovl_parse_opt()
655 * difference, since config->redirect_dir is only used for upper. in ovl_parse_opt()
657 if (!config->upperdir && config->redirect_follow) in ovl_parse_opt()
658 config->redirect_dir = true; in ovl_parse_opt()
660 /* Resolve metacopy -> redirect_dir dependency */ in ovl_parse_opt()
661 if (config->metacopy && !config->redirect_dir) { in ovl_parse_opt()
664 config->redirect_mode); in ovl_parse_opt()
665 return -EINVAL; in ovl_parse_opt()
673 config->redirect_mode); in ovl_parse_opt()
674 config->metacopy = false; in ovl_parse_opt()
677 config->redirect_follow = config->redirect_dir = true; in ovl_parse_opt()
681 /* Resolve nfs_export -> index dependency */ in ovl_parse_opt()
682 if (config->nfs_export && !config->index) { in ovl_parse_opt()
683 if (!config->upperdir && config->redirect_follow) { in ovl_parse_opt()
684 …pr_info("NFS export requires \"redirect_dir=nofollow\" on non-upper mount, falling back to nfs_exp… in ovl_parse_opt()
685 config->nfs_export = false; in ovl_parse_opt()
688 return -EINVAL; in ovl_parse_opt()
695 config->nfs_export = false; in ovl_parse_opt()
698 config->index = true; in ovl_parse_opt()
702 /* Resolve nfs_export -> !metacopy dependency */ in ovl_parse_opt()
703 if (config->nfs_export && config->metacopy) { in ovl_parse_opt()
706 return -EINVAL; in ovl_parse_opt()
714 config->nfs_export = false; in ovl_parse_opt()
721 config->metacopy = false; in ovl_parse_opt()
734 struct inode *dir = ofs->workbasedir->d_inode; in ovl_workdir_create()
742 work = lookup_one_len(name, ofs->workbasedir, strlen(name)); in ovl_workdir_create()
750 if (work->d_inode) { in ovl_workdir_create()
751 err = -EEXIST; in ovl_workdir_create()
761 if (err == -EINVAL) { in ovl_workdir_create()
773 err = -EINVAL; in ovl_workdir_create()
781 * b) -ENODATA (there was no POSIX ACL xattr) in ovl_workdir_create()
782 * c) -EOPNOTSUPP (POSIX ACL xattrs are not supported) in ovl_workdir_create()
785 * mean that the xattr doesn't exist (e.g. -ERANGE is returned in ovl_workdir_create()
791 if (err && err != -ENODATA && err != -EOPNOTSUPP) in ovl_workdir_create()
795 if (err && err != -ENODATA && err != -EOPNOTSUPP) in ovl_workdir_create()
799 inode_lock(work->d_inode); in ovl_workdir_create()
801 inode_unlock(work->d_inode); in ovl_workdir_create()
815 pr_warn("failed to create directory %s/%s (errno: %i); mounting read-only\n", in ovl_workdir_create()
816 ofs->config.workdir, name, -err); in ovl_workdir_create()
836 int err = -EINVAL; in ovl_mount_dir_noesc()
847 err = -EINVAL; in ovl_mount_dir_noesc()
848 if (ovl_dentry_weird(path->dentry)) { in ovl_mount_dir_noesc()
852 if (!d_is_dir(path->dentry)) { in ovl_mount_dir_noesc()
866 int err = -ENOMEM; in ovl_mount_dir()
873 if (!err && path->dentry->d_flags & DCACHE_OP_REAL) { in ovl_mount_dir()
877 err = -EINVAL; in ovl_mount_dir()
893 ofs->namelen = max(ofs->namelen, statfs.f_namelen); in ovl_check_namelen()
912 *stack_depth = max(*stack_depth, path->mnt->mnt_sb->s_stack_depth); in ovl_lower_dir()
918 fh_type = ovl_can_decode_fh(path->dentry->d_sb); in ovl_lower_dir()
919 if ((ofs->config.nfs_export || in ovl_lower_dir()
920 (ofs->config.index && ofs->config.upperdir)) && !fh_type) { in ovl_lower_dir()
921 ofs->config.index = false; in ovl_lower_dir()
922 ofs->config.nfs_export = false; in ovl_lower_dir()
927 /* Check if lower fs has 32bit inode numbers */ in ovl_lower_dir()
929 ofs->xino_mode = -1; in ovl_lower_dir()
971 return ovl_xattr_get(dentry, inode, handler->name, buffer, size, flags); in ovl_posix_acl_xattr_get()
985 /* Check that everything is OK before copy-up */ in ovl_posix_acl_xattr_set()
991 err = -EOPNOTSUPP; in ovl_posix_acl_xattr_set()
994 if (!realinode->i_op->set_acl) in ovl_posix_acl_xattr_set()
996 if (handler->flags == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode)) { in ovl_posix_acl_xattr_set()
997 err = acl ? -EACCES : 0; in ovl_posix_acl_xattr_set()
1000 err = -EPERM; in ovl_posix_acl_xattr_set()
1010 if (unlikely(inode->i_mode & S_ISGID) && in ovl_posix_acl_xattr_set()
1011 handler->flags == ACL_TYPE_ACCESS && in ovl_posix_acl_xattr_set()
1012 !in_group_p(inode->i_gid) && in ovl_posix_acl_xattr_set()
1021 err = ovl_xattr_set(dentry, inode, handler->name, value, size, flags); in ovl_posix_acl_xattr_set()
1037 return -EOPNOTSUPP; in ovl_own_xattr_get()
1045 return -EOPNOTSUPP; in ovl_own_xattr_set()
1111 if (err == -ELOOP) in ovl_setup_trap()
1124 * attempted to be used as a lower layer in a new overlay mount.
1128 if (ofs->config.index) { in ovl_report_in_use()
1129 …pr_err("%s is in-use as upperdir/workdir of another mount, mount with '-o index=off' to override e… in ovl_report_in_use()
1131 return -EBUSY; in ovl_report_in_use()
1133 …pr_warn("%s is in-use as upperdir/workdir of another mount, accessing files from both mounts will … in ovl_report_in_use()
1145 err = ovl_mount_dir(ofs->config.upperdir, upperpath); in ovl_get_upper()
1150 if (sb_rdonly(upperpath->mnt->mnt_sb)) { in ovl_get_upper()
1151 pr_err("upper fs is r/o, try multi-lower layers mount\n"); in ovl_get_upper()
1152 err = -EINVAL; in ovl_get_upper()
1156 err = ovl_check_namelen(upperpath, ofs, ofs->config.upperdir); in ovl_get_upper()
1160 err = ovl_setup_trap(sb, upperpath->dentry, &upper_layer->trap, in ovl_get_upper()
1173 upper_mnt->mnt_flags &= ~(MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME); in ovl_get_upper()
1174 upper_layer->mnt = upper_mnt; in ovl_get_upper()
1175 upper_layer->idx = 0; in ovl_get_upper()
1176 upper_layer->fsid = 0; in ovl_get_upper()
1183 * okay because we don't yet have guarantees in that case, but it will in ovl_get_upper()
1187 if (upper_mnt->mnt_sb->s_flags & SB_NOSEC) in ovl_get_upper()
1188 sb->s_flags |= SB_NOSEC; in ovl_get_upper()
1190 if (ovl_inuse_trylock(ovl_upper_mnt(ofs)->mnt_root)) { in ovl_get_upper()
1191 ofs->upperdir_locked = true; in ovl_get_upper()
1230 /* Name is inline and stable - using snapshot as a copy helper */ in ovl_check_rename_whiteout()
1234 if (err == -EINVAL) in ovl_check_rename_whiteout()
1269 inode_lock_nested(parent->d_inode, I_MUTEX_PARENT); in ovl_lookup_or_create()
1271 if (!IS_ERR(child) && !child->d_inode) in ovl_lookup_or_create()
1272 child = ovl_create_real(parent->d_inode, child, in ovl_lookup_or_create()
1274 inode_unlock(parent->d_inode); in ovl_lookup_or_create()
1287 struct dentry *d = dget(ofs->workbasedir); in ovl_create_volatile_dirty()
1293 for (ctr = ARRAY_SIZE(volatile_path); ctr; ctr--, name++) { in ovl_create_volatile_dirty()
1321 ofs->workdir = workdir; in ovl_make_workdir()
1323 err = ovl_setup_trap(sb, ofs->workdir, &ofs->workdir_trap, "workdir"); in ovl_make_workdir()
1342 temp = ovl_do_tmpfile(ofs->workdir, S_IFREG | 0); in ovl_make_workdir()
1343 ofs->tmpfile = !IS_ERR(temp); in ovl_make_workdir()
1344 if (ofs->tmpfile) in ovl_make_workdir()
1351 err = ovl_check_rename_whiteout(ofs->workdir); in ovl_make_workdir()
1362 err = ovl_do_setxattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE, "0", 1); in ovl_make_workdir()
1364 ofs->noxattr = true; in ovl_make_workdir()
1365 ofs->config.index = false; in ovl_make_workdir()
1366 ofs->config.metacopy = false; in ovl_make_workdir()
1370 ovl_do_removexattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE); in ovl_make_workdir()
1374 * We allowed sub-optimal upper fs configuration and don't want to break in ovl_make_workdir()
1378 if (ovl_dentry_remote(ofs->workdir) && in ovl_make_workdir()
1379 (!d_type || !rename_whiteout || ofs->noxattr)) { in ovl_make_workdir()
1381 err = -EINVAL; in ovl_make_workdir()
1389 if (ofs->config.ovl_volatile) { in ovl_make_workdir()
1398 fh_type = ovl_can_decode_fh(ofs->workdir->d_sb); in ovl_make_workdir()
1399 if (ofs->config.index && !fh_type) { in ovl_make_workdir()
1400 ofs->config.index = false; in ovl_make_workdir()
1406 ofs->xino_mode = -1; in ovl_make_workdir()
1409 if (ofs->config.nfs_export && !ofs->config.index) { in ovl_make_workdir()
1411 ofs->config.nfs_export = false; in ovl_make_workdir()
1424 err = ovl_mount_dir(ofs->config.workdir, &workpath); in ovl_get_workdir()
1428 err = -EINVAL; in ovl_get_workdir()
1429 if (upperpath->mnt != workpath.mnt) { in ovl_get_workdir()
1433 if (!ovl_workdir_ok(workpath.dentry, upperpath->dentry)) { in ovl_get_workdir()
1438 ofs->workbasedir = dget(workpath.dentry); in ovl_get_workdir()
1440 if (ovl_inuse_trylock(ofs->workbasedir)) { in ovl_get_workdir()
1441 ofs->workdir_locked = true; in ovl_get_workdir()
1448 err = ovl_setup_trap(sb, ofs->workbasedir, &ofs->workbasedir_trap, in ovl_get_workdir()
1472 /* Verify lower root is upper root origin */ in ovl_get_indexdir()
1473 err = ovl_verify_origin(ofs, upperpath->dentry, in ovl_get_indexdir()
1474 oe->lowerstack[0].dentry, true); in ovl_get_indexdir()
1481 iput(ofs->workdir_trap); in ovl_get_indexdir()
1482 ofs->workdir_trap = NULL; in ovl_get_indexdir()
1483 dput(ofs->workdir); in ovl_get_indexdir()
1484 ofs->workdir = NULL; in ovl_get_indexdir()
1489 ofs->indexdir = indexdir; in ovl_get_indexdir()
1490 ofs->workdir = dget(indexdir); in ovl_get_indexdir()
1492 err = ovl_setup_trap(sb, ofs->indexdir, &ofs->indexdir_trap, in ovl_get_indexdir()
1501 * upper dir file handle. In any case, verify or set xattr in ovl_get_indexdir()
1505 if (ovl_check_origin_xattr(ofs, ofs->indexdir)) { in ovl_get_indexdir()
1506 err = ovl_verify_set_fh(ofs, ofs->indexdir, in ovl_get_indexdir()
1508 upperpath->dentry, true, false); in ovl_get_indexdir()
1512 err = ovl_verify_upper(ofs, ofs->indexdir, upperpath->dentry, in ovl_get_indexdir()
1521 if (err || !ofs->indexdir) in ovl_get_indexdir()
1522 pr_warn("try deleting index dir or mounting with '-o index=off' to disable inodes index.\n"); in ovl_get_indexdir()
1533 if (!ofs->config.nfs_export && !ovl_upper_mnt(ofs)) in ovl_lower_uuid_ok()
1537 * We allow using single lower with null uuid for index and nfs_export in ovl_lower_uuid_ok()
1538 * for example to support those features with single lower squashfs. in ovl_lower_uuid_ok()
1539 * To avoid regressions in setups of overlay with re-formatted lower in ovl_lower_uuid_ok()
1540 * squashfs, do not allow decoding origin with lower null uuid unless in ovl_lower_uuid_ok()
1541 * user opted-in to one of the new features that require following the in ovl_lower_uuid_ok()
1542 * lower inode of non-dir upper. in ovl_lower_uuid_ok()
1544 if (!ofs->config.index && !ofs->config.metacopy && !ofs->config.xino && in ovl_lower_uuid_ok()
1548 for (i = 0; i < ofs->numfs; i++) { in ovl_lower_uuid_ok()
1550 * We use uuid to associate an overlay lower file handle with a in ovl_lower_uuid_ok()
1551 * lower layer, so we can accept lower fs with null uuid as long in ovl_lower_uuid_ok()
1552 * as all lower layers with null uuid are on the same fs. in ovl_lower_uuid_ok()
1553 * if we detect multiple lower fs with the same uuid, we in ovl_lower_uuid_ok()
1554 * disable lower file handle decoding on all of them. in ovl_lower_uuid_ok()
1556 if (ofs->fs[i].is_lower && in ovl_lower_uuid_ok()
1557 uuid_equal(&ofs->fs[i].sb->s_uuid, uuid)) { in ovl_lower_uuid_ok()
1558 ofs->fs[i].bad_uuid = true; in ovl_lower_uuid_ok()
1568 struct super_block *sb = path->mnt->mnt_sb; in ovl_get_fsid()
1574 for (i = 0; i < ofs->numfs; i++) { in ovl_get_fsid()
1575 if (ofs->fs[i].sb == sb) in ovl_get_fsid()
1579 if (!ovl_lower_uuid_ok(ofs, &sb->s_uuid)) { in ovl_get_fsid()
1581 if (ofs->config.index || ofs->config.nfs_export) { in ovl_get_fsid()
1582 ofs->config.index = false; in ovl_get_fsid()
1583 ofs->config.nfs_export = false; in ovl_get_fsid()
1584 pr_warn("%s uuid detected in lower fs '%pd2', falling back to index=off,nfs_export=off.\n", in ovl_get_fsid()
1585 uuid_is_null(&sb->s_uuid) ? "null" : in ovl_get_fsid()
1587 path->dentry); in ovl_get_fsid()
1597 ofs->fs[ofs->numfs].sb = sb; in ovl_get_fsid()
1598 ofs->fs[ofs->numfs].pseudo_dev = dev; in ovl_get_fsid()
1599 ofs->fs[ofs->numfs].bad_uuid = bad_uuid; in ovl_get_fsid()
1601 return ofs->numfs++; in ovl_get_fsid()
1611 err = -ENOMEM; in ovl_get_layers()
1612 ofs->fs = kcalloc(numlower + 1, sizeof(struct ovl_sb), GFP_KERNEL); in ovl_get_layers()
1613 if (ofs->fs == NULL) in ovl_get_layers()
1616 /* idx/fsid 0 are reserved for upper fs even with lower only overlay */ in ovl_get_layers()
1617 ofs->numfs++; in ovl_get_layers()
1620 * All lower layers that share the same fs as upper layer, use the same in ovl_get_layers()
1621 * pseudo_dev as upper layer. Allocate fs[0].pseudo_dev even for lower in ovl_get_layers()
1623 * is_lower will be set if upper fs is shared with a lower layer. in ovl_get_layers()
1625 err = get_anon_bdev(&ofs->fs[0].pseudo_dev); in ovl_get_layers()
1632 ofs->fs[0].sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_get_layers()
1633 ofs->fs[0].is_lower = false; in ovl_get_layers()
1646 * Check if lower root conflicts with this overlay layers before in ovl_get_layers()
1647 * checking if it is in-use as upperdir/workdir of "another" in ovl_get_layers()
1649 * the upperdir/workdir is in fact in-use by our in ovl_get_layers()
1673 * Make lower layers R/O. That way fchmod/fchown on lower file in ovl_get_layers()
1674 * will fail instead of modifying lower fs. in ovl_get_layers()
1676 mnt->mnt_flags |= MNT_READONLY | MNT_NOATIME; in ovl_get_layers()
1678 layers[ofs->numlayer].trap = trap; in ovl_get_layers()
1679 layers[ofs->numlayer].mnt = mnt; in ovl_get_layers()
1680 layers[ofs->numlayer].idx = ofs->numlayer; in ovl_get_layers()
1681 layers[ofs->numlayer].fsid = fsid; in ovl_get_layers()
1682 layers[ofs->numlayer].fs = &ofs->fs[fsid]; in ovl_get_layers()
1683 ofs->numlayer++; in ovl_get_layers()
1684 ofs->fs[fsid].is_lower = true; in ovl_get_layers()
1696 if (ofs->numfs - !ovl_upper_mnt(ofs) == 1) { in ovl_get_layers()
1697 if (ofs->config.xino == OVL_XINO_ON) in ovl_get_layers()
1699 ofs->xino_mode = 0; in ovl_get_layers()
1700 } else if (ofs->config.xino == OVL_XINO_OFF) { in ovl_get_layers()
1701 ofs->xino_mode = -1; in ovl_get_layers()
1702 } else if (ofs->xino_mode < 0) { in ovl_get_layers()
1706 * lower only overlay) +1 extra bit is reserved for the non in ovl_get_layers()
1708 * xino lower bits overflow. in ovl_get_layers()
1711 ofs->xino_mode = ilog2(ofs->numfs - 1) + 2; in ovl_get_layers()
1714 if (ofs->xino_mode > 0) { in ovl_get_layers()
1716 ofs->xino_mode); in ovl_get_layers()
1725 const char *lower, unsigned int numlower, in ovl_get_lowerstack() argument
1733 if (!ofs->config.upperdir && numlower == 1) { in ovl_get_lowerstack()
1735 return ERR_PTR(-EINVAL); in ovl_get_lowerstack()
1740 return ERR_PTR(-ENOMEM); in ovl_get_lowerstack()
1742 err = -EINVAL; in ovl_get_lowerstack()
1744 err = ovl_lower_dir(lower, &stack[i], ofs, &sb->s_stack_depth); in ovl_get_lowerstack()
1748 lower = strchr(lower, '\0') + 1; in ovl_get_lowerstack()
1751 err = -EINVAL; in ovl_get_lowerstack()
1752 sb->s_stack_depth++; in ovl_get_lowerstack()
1753 if (sb->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) { in ovl_get_lowerstack()
1762 err = -ENOMEM; in ovl_get_lowerstack()
1768 oe->lowerstack[i].dentry = dget(stack[i].dentry); in ovl_get_lowerstack()
1769 oe->lowerstack[i].layer = &ofs->layers[i+1]; in ovl_get_lowerstack()
1786 * - another layer of this overlayfs instance
1787 * - upper/work dir of any overlayfs instance
1804 err = -ELOOP; in ovl_check_layer()
1828 err = ovl_check_layer(sb, ofs, ovl_upper_mnt(ofs)->mnt_root, in ovl_check_overlapping_layers()
1837 * workbasedir. In that case, we already have their traps in in ovl_check_overlapping_layers()
1838 * inode cache and we will catch that case on lookup. in ovl_check_overlapping_layers()
1840 err = ovl_check_layer(sb, ofs, ofs->workbasedir, "workdir", in ovl_check_overlapping_layers()
1846 for (i = 1; i < ofs->numlayer; i++) { in ovl_check_overlapping_layers()
1848 ofs->layers[i].mnt->mnt_root, in ovl_check_overlapping_layers()
1862 struct ovl_path *lowerpath = &oe->lowerstack[0]; in ovl_get_root()
1863 unsigned long ino = d_inode(lowerpath->dentry)->i_ino; in ovl_get_root()
1864 int fsid = lowerpath->layer->fsid; in ovl_get_root()
1874 root->d_fsdata = oe; in ovl_get_root()
1878 ino = d_inode(upperdentry)->i_ino; in ovl_get_root()
1885 /* Root is always merge -> can have whiteouts */ in ovl_get_root()
1907 sb->s_d_op = &ovl_dentry_operations; in ovl_fill_super()
1909 err = -ENOMEM; in ovl_fill_super()
1914 ofs->creator_cred = cred = prepare_creds(); in ovl_fill_super()
1919 ofs->share_whiteout = true; in ovl_fill_super()
1921 ofs->config.index = ovl_index_def; in ovl_fill_super()
1922 ofs->config.nfs_export = ovl_nfs_export_def; in ovl_fill_super()
1923 ofs->config.xino = ovl_xino_def(); in ovl_fill_super()
1924 ofs->config.metacopy = ovl_metacopy_def; in ovl_fill_super()
1925 err = ovl_parse_opt((char *) data, &ofs->config); in ovl_fill_super()
1929 err = -EINVAL; in ovl_fill_super()
1930 if (!ofs->config.lowerdir) { in ovl_fill_super()
1936 err = -ENOMEM; in ovl_fill_super()
1937 splitlower = kstrdup(ofs->config.lowerdir, GFP_KERNEL); in ovl_fill_super()
1943 pr_err("too many lower directories, limit is %d\n", in ovl_fill_super()
1952 ofs->layers = layers; in ovl_fill_super()
1954 ofs->numlayer = 1; in ovl_fill_super()
1956 sb->s_stack_depth = 0; in ovl_fill_super()
1957 sb->s_maxbytes = MAX_LFS_FILESIZE; in ovl_fill_super()
1958 atomic_long_set(&ofs->last_ino, 1); in ovl_fill_super()
1960 if (ofs->config.xino != OVL_XINO_OFF) { in ovl_fill_super()
1961 ofs->xino_mode = BITS_PER_LONG - 32; in ovl_fill_super()
1962 if (!ofs->xino_mode) { in ovl_fill_super()
1964 ofs->config.xino = OVL_XINO_OFF; in ovl_fill_super()
1969 sb->s_op = &ovl_super_operations; in ovl_fill_super()
1971 if (ofs->config.upperdir) { in ovl_fill_super()
1974 if (!ofs->config.workdir) { in ovl_fill_super()
1983 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_fill_super()
1985 ofs->errseq = errseq_sample(&upper_sb->s_wb_err); in ovl_fill_super()
1986 if (errseq_check(&upper_sb->s_wb_err, ofs->errseq)) { in ovl_fill_super()
1987 err = -EIO; in ovl_fill_super()
1997 if (!ofs->workdir) in ovl_fill_super()
1998 sb->s_flags |= SB_RDONLY; in ovl_fill_super()
2000 sb->s_stack_depth = upper_sb->s_stack_depth; in ovl_fill_super()
2001 sb->s_time_gran = upper_sb->s_time_gran; in ovl_fill_super()
2010 sb->s_flags |= SB_RDONLY; in ovl_fill_super()
2012 if (!ovl_force_readonly(ofs) && ofs->config.index) { in ovl_fill_super()
2018 if (!ofs->indexdir) in ovl_fill_super()
2019 sb->s_flags |= SB_RDONLY; in ovl_fill_super()
2027 if (!ofs->indexdir) { in ovl_fill_super()
2028 ofs->config.index = false; in ovl_fill_super()
2029 if (ovl_upper_mnt(ofs) && ofs->config.nfs_export) { in ovl_fill_super()
2031 ofs->config.nfs_export = false; in ovl_fill_super()
2035 if (ofs->config.metacopy && ofs->config.nfs_export) { in ovl_fill_super()
2037 ofs->config.nfs_export = false; in ovl_fill_super()
2040 if (ofs->config.nfs_export) in ovl_fill_super()
2041 sb->s_export_op = &ovl_export_operations; in ovl_fill_super()
2044 cap_lower(cred->cap_effective, CAP_SYS_RESOURCE); in ovl_fill_super()
2046 sb->s_magic = OVERLAYFS_SUPER_MAGIC; in ovl_fill_super()
2047 sb->s_xattr = ovl_xattr_handlers; in ovl_fill_super()
2048 sb->s_fs_info = ofs; in ovl_fill_super()
2049 sb->s_flags |= SB_POSIXACL; in ovl_fill_super()
2050 sb->s_iflags |= SB_I_SKIP_SYNC; in ovl_fill_super()
2052 err = -ENOMEM; in ovl_fill_super()
2060 sb->s_root = root_dentry; in ovl_fill_super()
2092 inode_init_once(&oi->vfs_inode); in ovl_inode_init_once()
2105 return -ENOMEM; in ovl_init()