Lines Matching +full:lower +full:- +full:case
1 // SPDX-License-Identifier: GPL-2.0-only
60 for (i = 0; i < oe->numlower; i++) in ovl_entry_stack_free()
61 dput(oe->lowerstack[i].dentry); in ovl_entry_stack_free()
71 struct ovl_entry *oe = dentry->d_fsdata; in ovl_dentry_release()
82 struct dentry *real = NULL, *lower; in ovl_d_real() local
101 lower = ovl_dentry_lowerdata(dentry); in ovl_d_real()
102 if (!lower) in ovl_d_real()
104 real = lower; in ovl_d_real()
113 __func__, dentry, inode ? inode->i_sb->s_id : "NULL", in ovl_d_real()
114 inode ? inode->i_ino : 0, real, in ovl_d_real()
115 real && d_inode(real) ? d_inode(real)->i_ino : 0); in ovl_d_real()
124 if (d->d_flags & DCACHE_OP_WEAK_REVALIDATE) in ovl_revalidate_real()
125 ret = d->d_op->d_weak_revalidate(d, flags); in ovl_revalidate_real()
126 } else if (d->d_flags & DCACHE_OP_REVALIDATE) { in ovl_revalidate_real()
127 ret = d->d_op->d_revalidate(d, flags); in ovl_revalidate_real()
131 ret = -ESTALE; in ovl_revalidate_real()
140 struct ovl_entry *oe = dentry->d_fsdata; in ovl_dentry_revalidate_common()
149 for (i = 0; ret > 0 && i < oe->numlower; i++) { in ovl_dentry_revalidate_common()
150 ret = ovl_revalidate_real(oe->lowerstack[i].dentry, flags, in ovl_dentry_revalidate_common()
182 oi->cache = NULL; in ovl_alloc_inode()
183 oi->redirect = NULL; in ovl_alloc_inode()
184 oi->version = 0; in ovl_alloc_inode()
185 oi->flags = 0; in ovl_alloc_inode()
186 oi->__upperdentry = NULL; in ovl_alloc_inode()
187 oi->lower = NULL; in ovl_alloc_inode()
188 oi->lowerdata = NULL; in ovl_alloc_inode()
189 mutex_init(&oi->lock); in ovl_alloc_inode()
191 return &oi->vfs_inode; in ovl_alloc_inode()
198 kfree(oi->redirect); in ovl_free_inode()
199 mutex_destroy(&oi->lock); in ovl_free_inode()
207 dput(oi->__upperdentry); in ovl_destroy_inode()
208 iput(oi->lower); in ovl_destroy_inode()
209 if (S_ISDIR(inode->i_mode)) in ovl_destroy_inode()
212 iput(oi->lowerdata); in ovl_destroy_inode()
220 iput(ofs->workbasedir_trap); in ovl_free_fs()
221 iput(ofs->indexdir_trap); in ovl_free_fs()
222 iput(ofs->workdir_trap); in ovl_free_fs()
223 dput(ofs->whiteout); in ovl_free_fs()
224 dput(ofs->indexdir); in ovl_free_fs()
225 dput(ofs->workdir); in ovl_free_fs()
226 if (ofs->workdir_locked) in ovl_free_fs()
227 ovl_inuse_unlock(ofs->workbasedir); in ovl_free_fs()
228 dput(ofs->workbasedir); in ovl_free_fs()
229 if (ofs->upperdir_locked) in ovl_free_fs()
230 ovl_inuse_unlock(ovl_upper_mnt(ofs)->mnt_root); in ovl_free_fs()
232 /* Hack! Reuse ofs->layers as a vfsmount array before freeing it */ in ovl_free_fs()
233 mounts = (struct vfsmount **) ofs->layers; in ovl_free_fs()
234 for (i = 0; i < ofs->numlayer; i++) { in ovl_free_fs()
235 iput(ofs->layers[i].trap); in ovl_free_fs()
236 mounts[i] = ofs->layers[i].mnt; in ovl_free_fs()
238 kern_unmount_array(mounts, ofs->numlayer); in ovl_free_fs()
239 kfree(ofs->layers); in ovl_free_fs()
240 for (i = 0; i < ofs->numfs; i++) in ovl_free_fs()
241 free_anon_bdev(ofs->fs[i].pseudo_dev); in ovl_free_fs()
242 kfree(ofs->fs); in ovl_free_fs()
244 kfree(ofs->config.lowerdir); in ovl_free_fs()
245 kfree(ofs->config.upperdir); in ovl_free_fs()
246 kfree(ofs->config.workdir); in ovl_free_fs()
247 kfree(ofs->config.redirect_mode); in ovl_free_fs()
248 if (ofs->creator_cred) in ovl_free_fs()
249 put_cred(ofs->creator_cred); in ovl_free_fs()
255 struct ovl_fs *ofs = sb->s_fs_info; in ovl_put_super()
263 struct ovl_fs *ofs = sb->s_fs_info; in ovl_sync_fs()
274 errseq_set(&sb->s_wb_err, -EIO); in ovl_sync_fs()
275 return -EIO; in ovl_sync_fs()
292 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_sync_fs()
294 down_read(&upper_sb->s_umount); in ovl_sync_fs()
296 up_read(&upper_sb->s_umount); in ovl_sync_fs()
311 struct ovl_fs *ofs = dentry->d_sb->s_fs_info; in ovl_statfs()
312 struct dentry *root_dentry = dentry->d_sb->s_root; in ovl_statfs()
320 buf->f_namelen = ofs->namelen; in ovl_statfs()
321 buf->f_type = OVERLAYFS_SUPER_MAGIC; in ovl_statfs()
330 return (!ovl_upper_mnt(ofs) || !ofs->workdir); in ovl_force_readonly()
357 struct super_block *sb = dentry->d_sb; in ovl_show_options()
358 struct ovl_fs *ofs = sb->s_fs_info; in ovl_show_options()
360 seq_show_option(m, "lowerdir", ofs->config.lowerdir); in ovl_show_options()
361 if (ofs->config.upperdir) { in ovl_show_options()
362 seq_show_option(m, "upperdir", ofs->config.upperdir); in ovl_show_options()
363 seq_show_option(m, "workdir", ofs->config.workdir); in ovl_show_options()
365 if (ofs->config.default_permissions) in ovl_show_options()
367 if (strcmp(ofs->config.redirect_mode, ovl_redirect_mode_def()) != 0) in ovl_show_options()
368 seq_printf(m, ",redirect_dir=%s", ofs->config.redirect_mode); in ovl_show_options()
369 if (ofs->config.index != ovl_index_def) in ovl_show_options()
370 seq_printf(m, ",index=%s", ofs->config.index ? "on" : "off"); in ovl_show_options()
371 if (!ofs->config.uuid) in ovl_show_options()
373 if (ofs->config.nfs_export != ovl_nfs_export_def) in ovl_show_options()
374 seq_printf(m, ",nfs_export=%s", ofs->config.nfs_export ? in ovl_show_options()
376 if (ofs->config.xino != ovl_xino_def() && !ovl_same_fs(sb)) in ovl_show_options()
377 seq_printf(m, ",xino=%s", ovl_xino_str[ofs->config.xino]); in ovl_show_options()
378 if (ofs->config.metacopy != ovl_metacopy_def) in ovl_show_options()
380 ofs->config.metacopy ? "on" : "off"); in ovl_show_options()
381 if (ofs->config.ovl_volatile) in ovl_show_options()
383 if (ofs->config.userxattr) in ovl_show_options()
390 struct ovl_fs *ofs = sb->s_fs_info; in ovl_remount()
395 return -EROFS; in ovl_remount()
398 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_remount()
400 down_read(&upper_sb->s_umount); in ovl_remount()
402 up_read(&upper_sb->s_umount); in ovl_remount()
491 config->redirect_dir = true; in ovl_parse_redirect_mode()
496 config->redirect_follow = true; in ovl_parse_redirect_mode()
498 config->redirect_follow = true; in ovl_parse_redirect_mode()
501 config->redirect_follow = true; in ovl_parse_redirect_mode()
505 return -EINVAL; in ovl_parse_redirect_mode()
518 config->redirect_mode = kstrdup(ovl_redirect_mode_def(), GFP_KERNEL); in ovl_parse_opt()
519 if (!config->redirect_mode) in ovl_parse_opt()
520 return -ENOMEM; in ovl_parse_opt()
531 case OPT_UPPERDIR: in ovl_parse_opt()
532 kfree(config->upperdir); in ovl_parse_opt()
533 config->upperdir = match_strdup(&args[0]); in ovl_parse_opt()
534 if (!config->upperdir) in ovl_parse_opt()
535 return -ENOMEM; in ovl_parse_opt()
538 case OPT_LOWERDIR: in ovl_parse_opt()
539 kfree(config->lowerdir); in ovl_parse_opt()
540 config->lowerdir = match_strdup(&args[0]); in ovl_parse_opt()
541 if (!config->lowerdir) in ovl_parse_opt()
542 return -ENOMEM; in ovl_parse_opt()
545 case OPT_WORKDIR: in ovl_parse_opt()
546 kfree(config->workdir); in ovl_parse_opt()
547 config->workdir = match_strdup(&args[0]); in ovl_parse_opt()
548 if (!config->workdir) in ovl_parse_opt()
549 return -ENOMEM; in ovl_parse_opt()
552 case OPT_DEFAULT_PERMISSIONS: in ovl_parse_opt()
553 config->default_permissions = true; in ovl_parse_opt()
556 case OPT_REDIRECT_DIR: in ovl_parse_opt()
557 kfree(config->redirect_mode); in ovl_parse_opt()
558 config->redirect_mode = match_strdup(&args[0]); in ovl_parse_opt()
559 if (!config->redirect_mode) in ovl_parse_opt()
560 return -ENOMEM; in ovl_parse_opt()
564 case OPT_INDEX_ON: in ovl_parse_opt()
565 config->index = true; in ovl_parse_opt()
569 case OPT_INDEX_OFF: in ovl_parse_opt()
570 config->index = false; in ovl_parse_opt()
574 case OPT_UUID_ON: in ovl_parse_opt()
575 config->uuid = true; in ovl_parse_opt()
578 case OPT_UUID_OFF: in ovl_parse_opt()
579 config->uuid = false; in ovl_parse_opt()
582 case OPT_NFS_EXPORT_ON: in ovl_parse_opt()
583 config->nfs_export = true; in ovl_parse_opt()
587 case OPT_NFS_EXPORT_OFF: in ovl_parse_opt()
588 config->nfs_export = false; in ovl_parse_opt()
592 case OPT_XINO_ON: in ovl_parse_opt()
593 config->xino = OVL_XINO_ON; in ovl_parse_opt()
596 case OPT_XINO_OFF: in ovl_parse_opt()
597 config->xino = OVL_XINO_OFF; in ovl_parse_opt()
600 case OPT_XINO_AUTO: in ovl_parse_opt()
601 config->xino = OVL_XINO_AUTO; in ovl_parse_opt()
604 case OPT_METACOPY_ON: in ovl_parse_opt()
605 config->metacopy = true; in ovl_parse_opt()
609 case OPT_METACOPY_OFF: in ovl_parse_opt()
610 config->metacopy = false; in ovl_parse_opt()
614 case OPT_VOLATILE: in ovl_parse_opt()
615 config->ovl_volatile = true; in ovl_parse_opt()
618 case OPT_USERXATTR: in ovl_parse_opt()
619 config->userxattr = true; 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()
726 /* Resolve userxattr -> !redirect && !metacopy dependency */ in ovl_parse_opt()
727 if (config->userxattr) { in ovl_parse_opt()
728 if (config->redirect_follow && redirect_opt) { in ovl_parse_opt()
730 config->redirect_mode); in ovl_parse_opt()
731 return -EINVAL; in ovl_parse_opt()
733 if (config->metacopy && metacopy_opt) { in ovl_parse_opt()
735 return -EINVAL; in ovl_parse_opt()
743 config->redirect_dir = config->redirect_follow = false; in ovl_parse_opt()
744 config->metacopy = false; in ovl_parse_opt()
756 struct inode *dir = ofs->workbasedir->d_inode; in ovl_workdir_create()
764 work = lookup_one_len(name, ofs->workbasedir, strlen(name)); in ovl_workdir_create()
772 if (work->d_inode) { in ovl_workdir_create()
773 err = -EEXIST; in ovl_workdir_create()
783 if (err == -EINVAL) { in ovl_workdir_create()
799 * b) -ENODATA (there was no POSIX ACL xattr) in ovl_workdir_create()
800 * c) -EOPNOTSUPP (POSIX ACL xattrs are not supported) in ovl_workdir_create()
803 * mean that the xattr doesn't exist (e.g. -ERANGE is returned in ovl_workdir_create()
810 if (err && err != -ENODATA && err != -EOPNOTSUPP) in ovl_workdir_create()
815 if (err && err != -ENODATA && err != -EOPNOTSUPP) in ovl_workdir_create()
819 inode_lock(work->d_inode); in ovl_workdir_create()
821 inode_unlock(work->d_inode); in ovl_workdir_create()
835 pr_warn("failed to create directory %s/%s (errno: %i); mounting read-only\n", in ovl_workdir_create()
836 ofs->config.workdir, name, -err); in ovl_workdir_create()
856 int err = -EINVAL; in ovl_mount_dir_noesc()
867 err = -EINVAL; in ovl_mount_dir_noesc()
868 if (ovl_dentry_weird(path->dentry)) { in ovl_mount_dir_noesc()
872 if (mnt_user_ns(path->mnt) != &init_user_ns) { in ovl_mount_dir_noesc()
876 if (!d_is_dir(path->dentry)) { in ovl_mount_dir_noesc()
890 int err = -ENOMEM; in ovl_mount_dir()
897 if (!err && path->dentry->d_flags & DCACHE_OP_REAL) { in ovl_mount_dir()
901 err = -EINVAL; in ovl_mount_dir()
917 ofs->namelen = max(ofs->namelen, statfs.f_namelen); in ovl_check_namelen()
936 *stack_depth = max(*stack_depth, path->mnt->mnt_sb->s_stack_depth); in ovl_lower_dir()
942 fh_type = ovl_can_decode_fh(path->dentry->d_sb); in ovl_lower_dir()
943 if ((ofs->config.nfs_export || in ovl_lower_dir()
944 (ofs->config.index && ofs->config.upperdir)) && !fh_type) { in ovl_lower_dir()
945 ofs->config.index = false; in ovl_lower_dir()
946 ofs->config.nfs_export = false; in ovl_lower_dir()
954 if (ofs->config.xino == OVL_XINO_AUTO && in ovl_lower_dir()
955 ofs->config.upperdir && !fh_type) { in ovl_lower_dir()
956 ofs->config.xino = OVL_XINO_OFF; in ovl_lower_dir()
961 /* Check if lower fs has 32bit inode numbers */ in ovl_lower_dir()
963 ofs->xino_mode = -1; in ovl_lower_dir()
1005 return ovl_xattr_get(dentry, inode, handler->name, buffer, size); in ovl_posix_acl_xattr_get()
1020 /* Check that everything is OK before copy-up */ in ovl_posix_acl_xattr_set()
1026 err = -EOPNOTSUPP; in ovl_posix_acl_xattr_set()
1029 if (!realinode->i_op->set_acl) in ovl_posix_acl_xattr_set()
1031 if (handler->flags == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode)) { in ovl_posix_acl_xattr_set()
1032 err = acl ? -EACCES : 0; in ovl_posix_acl_xattr_set()
1035 err = -EPERM; in ovl_posix_acl_xattr_set()
1045 if (unlikely(inode->i_mode & S_ISGID) && in ovl_posix_acl_xattr_set()
1046 handler->flags == ACL_TYPE_ACCESS && in ovl_posix_acl_xattr_set()
1047 !in_group_p(inode->i_gid) && in ovl_posix_acl_xattr_set()
1056 err = ovl_xattr_set(dentry, inode, handler->name, value, size, flags); in ovl_posix_acl_xattr_set()
1068 return -EOPNOTSUPP; in ovl_own_xattr_get()
1077 return -EOPNOTSUPP; in ovl_own_xattr_set()
1159 if (err == -ELOOP) in ovl_setup_trap()
1172 * attempted to be used as a lower layer in a new overlay mount.
1176 if (ofs->config.index) { in ovl_report_in_use()
1177 …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()
1179 return -EBUSY; in ovl_report_in_use()
1181 …pr_warn("%s is in-use as upperdir/workdir of another mount, accessing files from both mounts will … in ovl_report_in_use()
1193 err = ovl_mount_dir(ofs->config.upperdir, upperpath); in ovl_get_upper()
1198 if (__mnt_is_readonly(upperpath->mnt)) { in ovl_get_upper()
1199 pr_err("upper fs is r/o, try multi-lower layers mount\n"); in ovl_get_upper()
1200 err = -EINVAL; in ovl_get_upper()
1204 err = ovl_check_namelen(upperpath, ofs, ofs->config.upperdir); in ovl_get_upper()
1208 err = ovl_setup_trap(sb, upperpath->dentry, &upper_layer->trap, in ovl_get_upper()
1221 upper_mnt->mnt_flags &= ~(MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME); in ovl_get_upper()
1222 upper_layer->mnt = upper_mnt; in ovl_get_upper()
1223 upper_layer->idx = 0; in ovl_get_upper()
1224 upper_layer->fsid = 0; in ovl_get_upper()
1231 * okay because we don't yet have guarantees in that case, but it will in ovl_get_upper()
1235 if (upper_mnt->mnt_sb->s_flags & SB_NOSEC) in ovl_get_upper()
1236 sb->s_flags |= SB_NOSEC; in ovl_get_upper()
1238 if (ovl_inuse_trylock(ovl_upper_mnt(ofs)->mnt_root)) { in ovl_get_upper()
1239 ofs->upperdir_locked = true; in ovl_get_upper()
1278 /* Name is inline and stable - using snapshot as a copy helper */ in ovl_check_rename_whiteout()
1282 if (err == -EINVAL) in ovl_check_rename_whiteout()
1317 inode_lock_nested(parent->d_inode, I_MUTEX_PARENT); in ovl_lookup_or_create()
1319 if (!IS_ERR(child) && !child->d_inode) in ovl_lookup_or_create()
1320 child = ovl_create_real(parent->d_inode, child, in ovl_lookup_or_create()
1322 inode_unlock(parent->d_inode); in ovl_lookup_or_create()
1335 struct dentry *d = dget(ofs->workbasedir); in ovl_create_volatile_dirty()
1341 for (ctr = ARRAY_SIZE(volatile_path); ctr; ctr--, name++) { in ovl_create_volatile_dirty()
1369 ofs->workdir = workdir; in ovl_make_workdir()
1371 err = ovl_setup_trap(sb, ofs->workdir, &ofs->workdir_trap, "workdir"); in ovl_make_workdir()
1390 temp = ovl_do_tmpfile(ofs->workdir, S_IFREG | 0); in ovl_make_workdir()
1391 ofs->tmpfile = !IS_ERR(temp); in ovl_make_workdir()
1392 if (ofs->tmpfile) in ovl_make_workdir()
1399 err = ovl_check_rename_whiteout(ofs->workdir); in ovl_make_workdir()
1410 err = ovl_do_setxattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE, "0", 1); in ovl_make_workdir()
1412 ofs->noxattr = true; in ovl_make_workdir()
1413 if (ofs->config.index || ofs->config.metacopy) { in ovl_make_workdir()
1414 ofs->config.index = false; in ovl_make_workdir()
1415 ofs->config.metacopy = false; in ovl_make_workdir()
1422 if (ofs->config.xino == OVL_XINO_AUTO) { in ovl_make_workdir()
1423 ofs->config.xino = OVL_XINO_OFF; in ovl_make_workdir()
1428 ovl_do_removexattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE); in ovl_make_workdir()
1432 * We allowed sub-optimal upper fs configuration and don't want to break in ovl_make_workdir()
1436 if (ovl_dentry_remote(ofs->workdir) && in ovl_make_workdir()
1437 (!d_type || !rename_whiteout || ofs->noxattr)) { in ovl_make_workdir()
1439 err = -EINVAL; in ovl_make_workdir()
1447 if (ofs->config.ovl_volatile) { in ovl_make_workdir()
1456 fh_type = ovl_can_decode_fh(ofs->workdir->d_sb); in ovl_make_workdir()
1457 if (ofs->config.index && !fh_type) { in ovl_make_workdir()
1458 ofs->config.index = false; in ovl_make_workdir()
1464 ofs->xino_mode = -1; in ovl_make_workdir()
1467 if (ofs->config.nfs_export && !ofs->config.index) { in ovl_make_workdir()
1469 ofs->config.nfs_export = false; in ovl_make_workdir()
1482 err = ovl_mount_dir(ofs->config.workdir, &workpath); in ovl_get_workdir()
1486 err = -EINVAL; in ovl_get_workdir()
1487 if (upperpath->mnt != workpath.mnt) { in ovl_get_workdir()
1491 if (!ovl_workdir_ok(workpath.dentry, upperpath->dentry)) { in ovl_get_workdir()
1496 ofs->workbasedir = dget(workpath.dentry); in ovl_get_workdir()
1498 if (ovl_inuse_trylock(ofs->workbasedir)) { in ovl_get_workdir()
1499 ofs->workdir_locked = true; in ovl_get_workdir()
1506 err = ovl_setup_trap(sb, ofs->workbasedir, &ofs->workbasedir_trap, in ovl_get_workdir()
1530 /* Verify lower root is upper root origin */ in ovl_get_indexdir()
1531 err = ovl_verify_origin(ofs, upperpath->dentry, in ovl_get_indexdir()
1532 oe->lowerstack[0].dentry, true); in ovl_get_indexdir()
1539 iput(ofs->workdir_trap); in ovl_get_indexdir()
1540 ofs->workdir_trap = NULL; in ovl_get_indexdir()
1541 dput(ofs->workdir); in ovl_get_indexdir()
1542 ofs->workdir = NULL; in ovl_get_indexdir()
1547 ofs->indexdir = indexdir; in ovl_get_indexdir()
1548 ofs->workdir = dget(indexdir); in ovl_get_indexdir()
1550 err = ovl_setup_trap(sb, ofs->indexdir, &ofs->indexdir_trap, in ovl_get_indexdir()
1559 * upper dir file handle. In any case, verify or set xattr in ovl_get_indexdir()
1563 if (ovl_check_origin_xattr(ofs, ofs->indexdir)) { in ovl_get_indexdir()
1564 err = ovl_verify_set_fh(ofs, ofs->indexdir, in ovl_get_indexdir()
1566 upperpath->dentry, true, false); in ovl_get_indexdir()
1570 err = ovl_verify_upper(ofs, ofs->indexdir, upperpath->dentry, in ovl_get_indexdir()
1579 if (err || !ofs->indexdir) in ovl_get_indexdir()
1580 pr_warn("try deleting index dir or mounting with '-o index=off' to disable inodes index.\n"); in ovl_get_indexdir()
1591 if (!ofs->config.nfs_export && !ovl_upper_mnt(ofs)) in ovl_lower_uuid_ok()
1595 * We allow using single lower with null uuid for index and nfs_export in ovl_lower_uuid_ok()
1596 * for example to support those features with single lower squashfs. in ovl_lower_uuid_ok()
1597 * To avoid regressions in setups of overlay with re-formatted lower in ovl_lower_uuid_ok()
1598 * squashfs, do not allow decoding origin with lower null uuid unless in ovl_lower_uuid_ok()
1599 * user opted-in to one of the new features that require following the in ovl_lower_uuid_ok()
1600 * lower inode of non-dir upper. in ovl_lower_uuid_ok()
1605 for (i = 0; i < ofs->numfs; i++) { in ovl_lower_uuid_ok()
1607 * We use uuid to associate an overlay lower file handle with a in ovl_lower_uuid_ok()
1608 * lower layer, so we can accept lower fs with null uuid as long in ovl_lower_uuid_ok()
1609 * as all lower layers with null uuid are on the same fs. in ovl_lower_uuid_ok()
1610 * if we detect multiple lower fs with the same uuid, we in ovl_lower_uuid_ok()
1611 * disable lower file handle decoding on all of them. in ovl_lower_uuid_ok()
1613 if (ofs->fs[i].is_lower && in ovl_lower_uuid_ok()
1614 uuid_equal(&ofs->fs[i].sb->s_uuid, uuid)) { in ovl_lower_uuid_ok()
1615 ofs->fs[i].bad_uuid = true; in ovl_lower_uuid_ok()
1625 struct super_block *sb = path->mnt->mnt_sb; in ovl_get_fsid()
1632 for (i = 0; i < ofs->numfs; i++) { in ovl_get_fsid()
1633 if (ofs->fs[i].sb == sb) in ovl_get_fsid()
1637 if (!ovl_lower_uuid_ok(ofs, &sb->s_uuid)) { in ovl_get_fsid()
1639 if (ofs->config.xino == OVL_XINO_AUTO) { in ovl_get_fsid()
1640 ofs->config.xino = OVL_XINO_OFF; in ovl_get_fsid()
1643 if (ofs->config.index || ofs->config.nfs_export) { in ovl_get_fsid()
1644 ofs->config.index = false; in ovl_get_fsid()
1645 ofs->config.nfs_export = false; in ovl_get_fsid()
1649 …pr_warn("%s uuid detected in lower fs '%pd2', falling back to xino=%s,index=off,nfs_export=off.\n", in ovl_get_fsid()
1650 uuid_is_null(&sb->s_uuid) ? "null" : in ovl_get_fsid()
1652 path->dentry, ovl_xino_str[ofs->config.xino]); in ovl_get_fsid()
1662 ofs->fs[ofs->numfs].sb = sb; in ovl_get_fsid()
1663 ofs->fs[ofs->numfs].pseudo_dev = dev; in ovl_get_fsid()
1664 ofs->fs[ofs->numfs].bad_uuid = bad_uuid; in ovl_get_fsid()
1666 return ofs->numfs++; in ovl_get_fsid()
1676 err = -ENOMEM; in ovl_get_layers()
1677 ofs->fs = kcalloc(numlower + 1, sizeof(struct ovl_sb), GFP_KERNEL); in ovl_get_layers()
1678 if (ofs->fs == NULL) in ovl_get_layers()
1681 /* idx/fsid 0 are reserved for upper fs even with lower only overlay */ in ovl_get_layers()
1682 ofs->numfs++; in ovl_get_layers()
1685 * All lower layers that share the same fs as upper layer, use the same in ovl_get_layers()
1686 * pseudo_dev as upper layer. Allocate fs[0].pseudo_dev even for lower in ovl_get_layers()
1688 * is_lower will be set if upper fs is shared with a lower layer. in ovl_get_layers()
1690 err = get_anon_bdev(&ofs->fs[0].pseudo_dev); in ovl_get_layers()
1697 ofs->fs[0].sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_get_layers()
1698 ofs->fs[0].is_lower = false; in ovl_get_layers()
1711 * Check if lower root conflicts with this overlay layers before in ovl_get_layers()
1712 * checking if it is in-use as upperdir/workdir of "another" in ovl_get_layers()
1714 * the upperdir/workdir is in fact in-use by our in ovl_get_layers()
1738 * Make lower layers R/O. That way fchmod/fchown on lower file in ovl_get_layers()
1739 * will fail instead of modifying lower fs. in ovl_get_layers()
1741 mnt->mnt_flags |= MNT_READONLY | MNT_NOATIME; in ovl_get_layers()
1743 layers[ofs->numlayer].trap = trap; in ovl_get_layers()
1744 layers[ofs->numlayer].mnt = mnt; in ovl_get_layers()
1745 layers[ofs->numlayer].idx = ofs->numlayer; in ovl_get_layers()
1746 layers[ofs->numlayer].fsid = fsid; in ovl_get_layers()
1747 layers[ofs->numlayer].fs = &ofs->fs[fsid]; in ovl_get_layers()
1748 ofs->numlayer++; in ovl_get_layers()
1749 ofs->fs[fsid].is_lower = true; in ovl_get_layers()
1761 if (ofs->numfs - !ovl_upper_mnt(ofs) == 1) { in ovl_get_layers()
1762 if (ofs->config.xino == OVL_XINO_ON) in ovl_get_layers()
1764 ofs->xino_mode = 0; in ovl_get_layers()
1765 } else if (ofs->config.xino == OVL_XINO_OFF) { in ovl_get_layers()
1766 ofs->xino_mode = -1; in ovl_get_layers()
1767 } else if (ofs->xino_mode < 0) { in ovl_get_layers()
1771 * lower only overlay) +1 extra bit is reserved for the non in ovl_get_layers()
1773 * xino lower bits overflow. in ovl_get_layers()
1776 ofs->xino_mode = ilog2(ofs->numfs - 1) + 2; in ovl_get_layers()
1779 if (ofs->xino_mode > 0) { in ovl_get_layers()
1781 ofs->xino_mode); in ovl_get_layers()
1790 const char *lower, unsigned int numlower, in ovl_get_lowerstack() argument
1798 if (!ofs->config.upperdir && numlower == 1) { in ovl_get_lowerstack()
1800 return ERR_PTR(-EINVAL); in ovl_get_lowerstack()
1805 return ERR_PTR(-ENOMEM); in ovl_get_lowerstack()
1807 err = -EINVAL; in ovl_get_lowerstack()
1809 err = ovl_lower_dir(lower, &stack[i], ofs, &sb->s_stack_depth); in ovl_get_lowerstack()
1813 lower = strchr(lower, '\0') + 1; in ovl_get_lowerstack()
1816 err = -EINVAL; in ovl_get_lowerstack()
1817 sb->s_stack_depth++; in ovl_get_lowerstack()
1818 if (sb->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) { in ovl_get_lowerstack()
1827 err = -ENOMEM; in ovl_get_lowerstack()
1833 oe->lowerstack[i].dentry = dget(stack[i].dentry); in ovl_get_lowerstack()
1834 oe->lowerstack[i].layer = &ofs->layers[i+1]; in ovl_get_lowerstack()
1851 * - another layer of this overlayfs instance
1852 * - upper/work dir of any overlayfs instance
1869 err = -ELOOP; in ovl_check_layer()
1893 err = ovl_check_layer(sb, ofs, ovl_upper_mnt(ofs)->mnt_root, in ovl_check_overlapping_layers()
1902 * workbasedir. In that case, we already have their traps in in ovl_check_overlapping_layers()
1903 * inode cache and we will catch that case on lookup. in ovl_check_overlapping_layers()
1905 err = ovl_check_layer(sb, ofs, ofs->workbasedir, "workdir", in ovl_check_overlapping_layers()
1911 for (i = 1; i < ofs->numlayer; i++) { in ovl_check_overlapping_layers()
1913 ofs->layers[i].mnt->mnt_root, in ovl_check_overlapping_layers()
1927 struct ovl_path *lowerpath = &oe->lowerstack[0]; in ovl_get_root()
1928 unsigned long ino = d_inode(lowerpath->dentry)->i_ino; in ovl_get_root()
1929 int fsid = lowerpath->layer->fsid; in ovl_get_root()
1939 root->d_fsdata = oe; in ovl_get_root()
1943 ino = d_inode(upperdentry)->i_ino; in ovl_get_root()
1950 /* Root is always merge -> can have whiteouts */ in ovl_get_root()
1972 err = -EIO; in ovl_fill_super()
1973 if (WARN_ON(sb->s_user_ns != current_user_ns())) in ovl_fill_super()
1976 sb->s_d_op = &ovl_dentry_operations; in ovl_fill_super()
1978 err = -ENOMEM; in ovl_fill_super()
1983 err = -ENOMEM; in ovl_fill_super()
1984 ofs->creator_cred = cred = prepare_creds(); in ovl_fill_super()
1989 ofs->share_whiteout = true; in ovl_fill_super()
1991 ofs->config.index = ovl_index_def; in ovl_fill_super()
1992 ofs->config.uuid = true; in ovl_fill_super()
1993 ofs->config.nfs_export = ovl_nfs_export_def; in ovl_fill_super()
1994 ofs->config.xino = ovl_xino_def(); in ovl_fill_super()
1995 ofs->config.metacopy = ovl_metacopy_def; in ovl_fill_super()
1996 err = ovl_parse_opt((char *) data, &ofs->config); in ovl_fill_super()
2000 err = -EINVAL; in ovl_fill_super()
2001 if (!ofs->config.lowerdir) { in ovl_fill_super()
2007 err = -ENOMEM; in ovl_fill_super()
2008 splitlower = kstrdup(ofs->config.lowerdir, GFP_KERNEL); in ovl_fill_super()
2012 err = -EINVAL; in ovl_fill_super()
2015 pr_err("too many lower directories, limit is %d\n", in ovl_fill_super()
2020 err = -ENOMEM; in ovl_fill_super()
2025 ofs->layers = layers; in ovl_fill_super()
2027 ofs->numlayer = 1; in ovl_fill_super()
2029 sb->s_stack_depth = 0; in ovl_fill_super()
2030 sb->s_maxbytes = MAX_LFS_FILESIZE; in ovl_fill_super()
2031 atomic_long_set(&ofs->last_ino, 1); in ovl_fill_super()
2033 if (ofs->config.xino != OVL_XINO_OFF) { in ovl_fill_super()
2034 ofs->xino_mode = BITS_PER_LONG - 32; in ovl_fill_super()
2035 if (!ofs->xino_mode) { in ovl_fill_super()
2037 ofs->config.xino = OVL_XINO_OFF; in ovl_fill_super()
2042 sb->s_op = &ovl_super_operations; in ovl_fill_super()
2044 if (ofs->config.upperdir) { in ovl_fill_super()
2047 err = -EINVAL; in ovl_fill_super()
2048 if (!ofs->config.workdir) { in ovl_fill_super()
2057 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_fill_super()
2059 ofs->errseq = errseq_sample(&upper_sb->s_wb_err); in ovl_fill_super()
2060 if (errseq_check(&upper_sb->s_wb_err, ofs->errseq)) { in ovl_fill_super()
2061 err = -EIO; in ovl_fill_super()
2071 if (!ofs->workdir) in ovl_fill_super()
2072 sb->s_flags |= SB_RDONLY; in ovl_fill_super()
2074 sb->s_stack_depth = upper_sb->s_stack_depth; in ovl_fill_super()
2075 sb->s_time_gran = upper_sb->s_time_gran; in ovl_fill_super()
2084 sb->s_flags |= SB_RDONLY; in ovl_fill_super()
2086 if (!ofs->config.uuid && ofs->numfs > 1) { in ovl_fill_super()
2087 pr_warn("The uuid=off requires a single fs for lower and upper, falling back to uuid=on.\n"); in ovl_fill_super()
2088 ofs->config.uuid = true; in ovl_fill_super()
2091 if (!ovl_force_readonly(ofs) && ofs->config.index) { in ovl_fill_super()
2097 if (!ofs->indexdir) in ovl_fill_super()
2098 sb->s_flags |= SB_RDONLY; in ovl_fill_super()
2106 if (!ofs->indexdir) { in ovl_fill_super()
2107 ofs->config.index = false; in ovl_fill_super()
2108 if (ovl_upper_mnt(ofs) && ofs->config.nfs_export) { in ovl_fill_super()
2110 ofs->config.nfs_export = false; in ovl_fill_super()
2114 if (ofs->config.metacopy && ofs->config.nfs_export) { in ovl_fill_super()
2116 ofs->config.nfs_export = false; in ovl_fill_super()
2119 if (ofs->config.nfs_export) in ovl_fill_super()
2120 sb->s_export_op = &ovl_export_operations; in ovl_fill_super()
2123 cap_lower(cred->cap_effective, CAP_SYS_RESOURCE); in ovl_fill_super()
2125 sb->s_magic = OVERLAYFS_SUPER_MAGIC; in ovl_fill_super()
2126 sb->s_xattr = ofs->config.userxattr ? ovl_user_xattr_handlers : in ovl_fill_super()
2128 sb->s_fs_info = ofs; in ovl_fill_super()
2129 sb->s_flags |= SB_POSIXACL; in ovl_fill_super()
2130 sb->s_iflags |= SB_I_SKIP_SYNC; in ovl_fill_super()
2132 err = -ENOMEM; in ovl_fill_super()
2140 sb->s_root = root_dentry; in ovl_fill_super()
2174 inode_init_once(&oi->vfs_inode); in ovl_inode_init_once()
2187 return -ENOMEM; in ovl_init()