250 lines
6.1 KiB
C
250 lines
6.1 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 2013, 2015 by Delphix. All rights reserved.
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* Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
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*/
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#include <sys/zfs_context.h>
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#if defined(_KERNEL)
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#include <sys/sunddi.h>
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#include <sys/ctype.h>
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#else
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#include <stdio.h>
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#include <unistd.h>
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#include <libnvpair.h>
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#include <ctype.h>
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#endif
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#include <sys/strings.h>
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#include <sys/dsl_deleg.h>
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#include "zfs_prop.h"
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#include "zfs_deleg.h"
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#include "zfs_namecheck.h"
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zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
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{ZFS_DELEG_PERM_ALLOW},
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{ZFS_DELEG_PERM_BOOKMARK},
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{ZFS_DELEG_PERM_CLONE},
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{ZFS_DELEG_PERM_CREATE},
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{ZFS_DELEG_PERM_DESTROY},
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{ZFS_DELEG_PERM_DIFF},
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{ZFS_DELEG_PERM_MOUNT},
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{ZFS_DELEG_PERM_PROMOTE},
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{ZFS_DELEG_PERM_RECEIVE},
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{ZFS_DELEG_PERM_RENAME},
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{ZFS_DELEG_PERM_ROLLBACK},
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{ZFS_DELEG_PERM_SNAPSHOT},
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{ZFS_DELEG_PERM_SHARE},
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{ZFS_DELEG_PERM_SEND},
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{ZFS_DELEG_PERM_USERPROP},
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{ZFS_DELEG_PERM_USERQUOTA},
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{ZFS_DELEG_PERM_GROUPQUOTA},
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{ZFS_DELEG_PERM_USERUSED},
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{ZFS_DELEG_PERM_GROUPUSED},
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{ZFS_DELEG_PERM_USEROBJQUOTA},
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{ZFS_DELEG_PERM_GROUPOBJQUOTA},
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{ZFS_DELEG_PERM_USEROBJUSED},
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{ZFS_DELEG_PERM_GROUPOBJUSED},
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{ZFS_DELEG_PERM_HOLD},
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{ZFS_DELEG_PERM_RELEASE},
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{ZFS_DELEG_PERM_LOAD_KEY},
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{ZFS_DELEG_PERM_CHANGE_KEY},
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{ZFS_DELEG_PERM_PROJECTUSED},
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{ZFS_DELEG_PERM_PROJECTQUOTA},
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{ZFS_DELEG_PERM_PROJECTOBJUSED},
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{ZFS_DELEG_PERM_PROJECTOBJQUOTA},
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{NULL}
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};
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static int
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zfs_valid_permission_name(const char *perm)
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{
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if (zfs_deleg_canonicalize_perm(perm))
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return (0);
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return (permset_namecheck(perm, NULL, NULL));
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}
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const char *
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zfs_deleg_canonicalize_perm(const char *perm)
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{
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int i;
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zfs_prop_t prop;
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for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
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if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
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return (perm);
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}
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prop = zfs_name_to_prop(perm);
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if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
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return (zfs_prop_to_name(prop));
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return (NULL);
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}
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static int
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zfs_validate_who(char *who)
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{
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char *p;
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if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
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return (-1);
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switch (who[0]) {
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case ZFS_DELEG_USER:
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case ZFS_DELEG_GROUP:
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case ZFS_DELEG_USER_SETS:
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case ZFS_DELEG_GROUP_SETS:
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if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
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return (-1);
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for (p = &who[3]; *p; p++)
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if (!isdigit(*p))
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return (-1);
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break;
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case ZFS_DELEG_NAMED_SET:
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case ZFS_DELEG_NAMED_SET_SETS:
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if (who[1] != ZFS_DELEG_NA)
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return (-1);
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return (permset_namecheck(&who[3], NULL, NULL));
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case ZFS_DELEG_CREATE:
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case ZFS_DELEG_CREATE_SETS:
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if (who[1] != ZFS_DELEG_NA)
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return (-1);
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if (who[3] != '\0')
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return (-1);
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break;
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case ZFS_DELEG_EVERYONE:
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case ZFS_DELEG_EVERYONE_SETS:
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if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
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return (-1);
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if (who[3] != '\0')
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return (-1);
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break;
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default:
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return (-1);
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}
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return (0);
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}
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int
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zfs_deleg_verify_nvlist(nvlist_t *nvp)
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{
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nvpair_t *who, *perm_name;
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nvlist_t *perms;
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int error;
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if (nvp == NULL)
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return (-1);
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who = nvlist_next_nvpair(nvp, NULL);
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if (who == NULL)
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return (-1);
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do {
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if (zfs_validate_who(nvpair_name(who)))
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return (-1);
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error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
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if (error && error != ENOENT)
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return (-1);
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if (error == ENOENT)
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continue;
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perm_name = nvlist_next_nvpair(perms, NULL);
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if (perm_name == NULL) {
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return (-1);
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}
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do {
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error = zfs_valid_permission_name(
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nvpair_name(perm_name));
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if (error)
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return (-1);
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} while ((perm_name = nvlist_next_nvpair(perms, perm_name))
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!= NULL);
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} while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
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return (0);
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}
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/*
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* Construct the base attribute name. The base attribute names
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* are the "key" to locate the jump objects which contain the actual
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* permissions. The base attribute names are encoded based on
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* type of entry and whether it is a local or descendent permission.
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*
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* Arguments:
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* attr - attribute name return string, attribute is assumed to be
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* ZFS_MAX_DELEG_NAME long.
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* type - type of entry to construct
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* inheritchr - inheritance type (local,descendent, or NA for create and
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* permission set definitions
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* data - is either a permission set name or a 64 bit uid/gid.
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*/
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void
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zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
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char inheritchr, void *data)
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{
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int len = ZFS_MAX_DELEG_NAME;
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uint64_t *id = data;
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switch (type) {
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case ZFS_DELEG_USER:
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case ZFS_DELEG_GROUP:
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case ZFS_DELEG_USER_SETS:
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case ZFS_DELEG_GROUP_SETS:
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(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
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ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
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break;
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case ZFS_DELEG_NAMED_SET_SETS:
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case ZFS_DELEG_NAMED_SET:
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(void) snprintf(attr, len, "%c-%c%s", type,
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ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
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break;
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case ZFS_DELEG_CREATE:
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case ZFS_DELEG_CREATE_SETS:
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(void) snprintf(attr, len, "%c-%c", type,
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ZFS_DELEG_FIELD_SEP_CHR);
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break;
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case ZFS_DELEG_EVERYONE:
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case ZFS_DELEG_EVERYONE_SETS:
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(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
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ZFS_DELEG_FIELD_SEP_CHR);
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break;
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default:
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ASSERT(!"bad zfs_deleg_who_type_t");
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}
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}
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#if defined(_KERNEL)
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EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
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EXPORT_SYMBOL(zfs_deleg_whokey);
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EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
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#endif
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