diff options
Diffstat (limited to 'sys/contrib/opensolaris/common/zfs/zfs_namecheck.c')
| -rw-r--r-- | sys/contrib/opensolaris/common/zfs/zfs_namecheck.c | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/sys/contrib/opensolaris/common/zfs/zfs_namecheck.c b/sys/contrib/opensolaris/common/zfs/zfs_namecheck.c deleted file mode 100644 index 2004d86..0000000 --- a/sys/contrib/opensolaris/common/zfs/zfs_namecheck.c +++ /dev/null @@ -1,287 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright 2007 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. - */ - -#pragma ident "%Z%%M% %I% %E% SMI" - -/* - * Common name validation routines for ZFS. These routines are shared by the - * userland code as well as the ioctl() layer to ensure that we don't - * inadvertently expose a hole through direct ioctl()s that never gets tested. - * In userland, however, we want significantly more information about _why_ the - * name is invalid. In the kernel, we only care whether it's valid or not. - * Each routine therefore takes a 'namecheck_err_t' which describes exactly why - * the name failed to validate. - * - * Each function returns 0 on success, -1 on error. - */ - -#if defined(_KERNEL) -#include <sys/systm.h> -#else -#include <string.h> -#endif - -#include <sys/param.h> -#include "zfs_namecheck.h" - -static int -valid_char(char c) -{ - return ((c >= 'a' && c <= 'z') || - (c >= 'A' && c <= 'Z') || - (c >= '0' && c <= '9') || - c == '-' || c == '_' || c == '.' || c == ':'); -} - -/* - * Snapshot names must be made up of alphanumeric characters plus the following - * characters: - * - * [-_.:] - */ -int -snapshot_namecheck(const char *path, namecheck_err_t *why, char *what) -{ - const char *loc; - - if (strlen(path) >= MAXNAMELEN) { - if (why) - *why = NAME_ERR_TOOLONG; - return (-1); - } - - if (path[0] == '\0') { - if (why) - *why = NAME_ERR_EMPTY_COMPONENT; - return (-1); - } - - for (loc = path; *loc; loc++) { - if (!valid_char(*loc)) { - if (why) { - *why = NAME_ERR_INVALCHAR; - *what = *loc; - } - return (-1); - } - } - return (0); -} - -/* - * Dataset names must be of the following form: - * - * [component][/]*[component][@component] - * - * Where each component is made up of alphanumeric characters plus the following - * characters: - * - * [-_.:] - */ -int -dataset_namecheck(const char *path, namecheck_err_t *why, char *what) -{ - const char *loc, *end; - int found_snapshot; - - /* - * Make sure the name is not too long. - * - * ZFS_MAXNAMELEN is the maximum dataset length used in the userland - * which is the same as MAXNAMELEN used in the kernel. - * If ZFS_MAXNAMELEN value is changed, make sure to cleanup all - * places using MAXNAMELEN. - */ - if (strlen(path) >= MAXNAMELEN) { - if (why) - *why = NAME_ERR_TOOLONG; - return (-1); - } - - /* Explicitly check for a leading slash. */ - if (path[0] == '/') { - if (why) - *why = NAME_ERR_LEADING_SLASH; - return (-1); - } - - if (path[0] == '\0') { - if (why) - *why = NAME_ERR_EMPTY_COMPONENT; - return (-1); - } - - loc = path; - found_snapshot = 0; - for (;;) { - /* Find the end of this component */ - end = loc; - while (*end != '/' && *end != '@' && *end != '\0') - end++; - - if (*end == '\0' && end[-1] == '/') { - /* trailing slashes are not allowed */ - if (why) - *why = NAME_ERR_TRAILING_SLASH; - return (-1); - } - - /* Zero-length components are not allowed */ - if (loc == end) { - if (why) { - /* - * Make sure this is really a zero-length - * component and not a '@@'. - */ - if (*end == '@' && found_snapshot) { - *why = NAME_ERR_MULTIPLE_AT; - } else { - *why = NAME_ERR_EMPTY_COMPONENT; - } - } - - return (-1); - } - - /* Validate the contents of this component */ - while (loc != end) { - if (!valid_char(*loc)) { - if (why) { - *why = NAME_ERR_INVALCHAR; - *what = *loc; - } - return (-1); - } - loc++; - } - - /* If we've reached the end of the string, we're OK */ - if (*end == '\0') - return (0); - - if (*end == '@') { - /* - * If we've found an @ symbol, indicate that we're in - * the snapshot component, and report a second '@' - * character as an error. - */ - if (found_snapshot) { - if (why) - *why = NAME_ERR_MULTIPLE_AT; - return (-1); - } - - found_snapshot = 1; - } - - /* - * If there is a '/' in a snapshot name - * then report an error - */ - if (*end == '/' && found_snapshot) { - if (why) - *why = NAME_ERR_TRAILING_SLASH; - return (-1); - } - - /* Update to the next component */ - loc = end + 1; - } -} - -/* - * 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. - * - * ZPOOL_MAXNAMELEN is the maximum pool length used in the userland - * which is the same as MAXNAMELEN used in the kernel. - * If ZPOOL_MAXNAMELEN value is changed, make sure to cleanup all - * places using MAXNAMELEN. - */ - if (strlen(pool) >= MAXNAMELEN) { - 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); -} - -/* - * Check if the dataset name is private for internal usage. - * '$' is reserved for internal dataset names. e.g. "$MOS" - * - * Return 1 if the given name is used internally. - * Return 0 if it is not. - */ -int -dataset_name_hidden(const char *name) -{ - if (strchr(name, '$') != NULL) - return (1); - - return (0); -} |
