zfs_namecheck.c revision edb901aab9c738b5eb15aa55933e82b0f2f9d9a2
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * CDDL HEADER START
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * The contents of this file are subject to the terms of the
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Common Development and Distribution License (the "License").
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * You may not use this file except in compliance with the License.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * or http://www.opensolaris.org/os/licensing.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * See the License for the specific language governing permissions
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * and limitations under the License.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * When distributing Covered Code, include this CDDL HEADER in each
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * If applicable, add the following below this CDDL HEADER, with the
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * fields enclosed by brackets "[]" replaced with your own identifying
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * information: Portions Copyright [yyyy] [name of copyright owner]
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * CDDL HEADER END
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Use is subject to license terms.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Copyright (c) 2013 by Delphix. All rights reserved.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Common name validation routines for ZFS. These routines are shared by the
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * userland code as well as the ioctl() layer to ensure that we don't
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * inadvertently expose a hole through direct ioctl()s that never gets tested.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * In userland, however, we want significantly more information about _why_ the
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * name is invalid. In the kernel, we only care whether it's valid or not.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Each routine therefore takes a 'namecheck_err_t' which describes exactly why
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * the name failed to validate.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Each function returns 0 on success, -1 on error.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#if defined(_KERNEL)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#include <sys/systm.h>
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#else
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#include <string.h>
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#endif
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#include <sys/param.h>
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#include <sys/nvpair.h>
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#include "zfs_namecheck.h"
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek#include "zfs_deleg.h"
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekstatic int
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekvalid_char(char c)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek{
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return ((c >= 'a' && c <= 'z') ||
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek (c >= 'A' && c <= 'Z') ||
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek (c >= '0' && c <= '9') ||
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek c == '-' || c == '_' || c == '.' || c == ':' || c == ' ');
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek}
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Snapshot names must be made up of alphanumeric characters plus the following
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * characters:
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * [-_.: ]
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekint
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekzfs_component_namecheck(const char *path, namecheck_err_t *why, char *what)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek{
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek const char *loc;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (strlen(path) >= ZFS_MAX_DATASET_NAME_LEN) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_TOOLONG;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (path[0] == '\0') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_EMPTY_COMPONENT;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek for (loc = path; *loc; loc++) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (!valid_char(*loc)) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_INVALCHAR;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *what = *loc;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (0);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek}
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Permissions set name must start with the letter '@' followed by the
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * same character restrictions as snapshot names, except that the name
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * cannot exceed 64 characters.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekint
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekpermset_namecheck(const char *path, namecheck_err_t *why, char *what)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek{
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (strlen(path) >= ZFS_PERMSET_MAXLEN) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_TOOLONG;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (path[0] != '@') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_NO_AT;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *what = path[0];
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (zfs_component_namecheck(&path[1], why, what));
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek}
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Entity names must be of the following form:
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * [component/]*[component][(@|#)component]?
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Where each component is made up of alphanumeric characters plus the following
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * characters:
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * [-_.:%]
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * We allow '%' here as we use that character internally to create unique
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * names for temporary clones (for online recv).
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekint
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekentity_namecheck(const char *path, namecheck_err_t *why, char *what)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek{
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek const char *start, *end;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek int found_delim;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Make sure the name is not too long.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (strlen(path) >= ZFS_MAX_DATASET_NAME_LEN) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_TOOLONG;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Explicitly check for a leading slash. */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (path[0] == '/') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_LEADING_SLASH;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (path[0] == '\0') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_EMPTY_COMPONENT;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek start = path;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek found_delim = 0;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek for (;;) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Find the end of this component */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek end = start;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek while (*end != '/' && *end != '@' && *end != '#' &&
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *end != '\0')
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek end++;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (*end == '\0' && end[-1] == '/') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* trailing slashes are not allowed */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_TRAILING_SLASH;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Validate the contents of this component */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek for (const char *loc = start; loc != end; loc++) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (!valid_char(*loc) && *loc != '%') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_INVALCHAR;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *what = *loc;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Snapshot or bookmark delimiter found */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (*end == '@' || *end == '#') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Multiple delimiters are not allowed */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (found_delim != 0) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_MULTIPLE_DELIMITERS;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek found_delim = 1;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Zero-length components are not allowed */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (start == end) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_EMPTY_COMPONENT;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* If we've reached the end of the string, we're OK */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (*end == '\0')
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (0);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * If there is a '/' in a snapshot or bookmark name
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * then report an error
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (*end == '/' && found_delim != 0) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_TRAILING_SLASH;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Update to the next component */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek start = end + 1;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek}
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Dataset is any entity, except bookmark
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekint
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekdataset_namecheck(const char *path, namecheck_err_t *why, char *what)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek{
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek int ret = entity_namecheck(path, why, what);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (ret == 0 && strchr(path, '#') != NULL) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why != NULL) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_INVALCHAR;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *what = '#';
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (ret);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek}
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek/*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * mountpoint names must be of the following form:
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * /[component][/]*[component][/]
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekint
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinekmountpoint_namecheck(const char *path, namecheck_err_t *why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek{
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek const char *start, *end;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /*
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Make sure none of the mountpoint component names are too long.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * If a component name is too long then the mkdir of the mountpoint
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * will fail but then the mountpoint property will be set to a value
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * that can never be mounted. Better to fail before setting the prop.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek * Extra slashes are OK, they will be tossed by the mountpoint mkdir.
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (path == NULL || *path != '/') {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_LEADING_SLASH;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek /* Skip leading slash */
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek start = &path[1];
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek do {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek end = start;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek while (*end != '/' && *end != '\0')
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek end++;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (end - start >= ZFS_MAX_DATASET_NAME_LEN) {
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek if (why)
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek *why = NAME_ERR_TOOLONG;
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek return (-1);
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek }
7b1019a6d29ccb7999dc76cba3dde1c627e8e609Jerry Jelinek start = end + 1;
} while (*end != '\0');
return (0);
}
/*
* For pool names, we have the same set of valid characters as described in
* dataset names, with the additional restriction that the pool name must begin
* with a letter. The pool names 'raidz' and 'mirror' are also reserved names
* that cannot be used.
*/
int
pool_namecheck(const char *pool, namecheck_err_t *why, char *what)
{
const char *c;
/*
* Make sure the name is not too long.
*/
if (strlen(pool) >= ZFS_MAX_DATASET_NAME_LEN) {
if (why)
*why = NAME_ERR_TOOLONG;
return (-1);
}
c = pool;
while (*c != '\0') {
if (!valid_char(*c)) {
if (why) {
*why = NAME_ERR_INVALCHAR;
*what = *c;
}
return (-1);
}
c++;
}
if (!(*pool >= 'a' && *pool <= 'z') &&
!(*pool >= 'A' && *pool <= 'Z')) {
if (why)
*why = NAME_ERR_NOLETTER;
return (-1);
}
if (strcmp(pool, "mirror") == 0 || strcmp(pool, "raidz") == 0) {
if (why)
*why = NAME_ERR_RESERVED;
return (-1);
}
if (pool[0] == 'c' && (pool[1] >= '0' && pool[1] <= '9')) {
if (why)
*why = NAME_ERR_DISKLIKE;
return (-1);
}
return (0);
}