OpenSolaris_b135/common/zfs/zfs_deleg.c
/*
* 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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#if defined(_KERNEL)
#include <sys/systm.h>
#include <sys/sunddi.h>
#include <sys/ctype.h>
#else
#include <stdio.h>
#include <unistd.h>
#include <strings.h>
#include <libnvpair.h>
#include <ctype.h>
#endif
/* XXX includes zfs_context.h, so why bother with the above? */
#include <sys/dsl_deleg.h>
#include "zfs_prop.h"
#include "zfs_deleg.h"
#include "zfs_namecheck.h"
/*
* permission table
*
* Keep this table in sorted order
*
* This table is used for displaying all permissions for
* zfs allow
*/
zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
{ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW},
{ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
{ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
{ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
{ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
{ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
{ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
{ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
{ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
{ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
{ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
{ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_NONE },
{ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
{ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
{ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
{ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
{ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
{ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
{ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
{NULL, ZFS_DELEG_NOTE_NONE }
};
static int
zfs_valid_permission_name(const char *perm)
{
if (zfs_deleg_canonicalize_perm(perm))
return (0);
return (permset_namecheck(perm, NULL, NULL));
}
const char *
zfs_deleg_canonicalize_perm(const char *perm)
{
int i;
zfs_prop_t prop;
for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
return (perm);
}
prop = zfs_name_to_prop(perm);
if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
return (zfs_prop_to_name(prop));
return (NULL);
}
static int
zfs_validate_who(char *who)
{
char *p;
if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
return (-1);
switch (who[0]) {
case ZFS_DELEG_USER:
case ZFS_DELEG_GROUP:
case ZFS_DELEG_USER_SETS:
case ZFS_DELEG_GROUP_SETS:
if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
return (-1);
for (p = &who[3]; *p; p++)
if (!isdigit(*p))
return (-1);
break;
case ZFS_DELEG_NAMED_SET:
case ZFS_DELEG_NAMED_SET_SETS:
if (who[1] != ZFS_DELEG_NA)
return (-1);
return (permset_namecheck(&who[3], NULL, NULL));
case ZFS_DELEG_CREATE:
case ZFS_DELEG_CREATE_SETS:
if (who[1] != ZFS_DELEG_NA)
return (-1);
if (who[3] != '\0')
return (-1);
break;
case ZFS_DELEG_EVERYONE:
case ZFS_DELEG_EVERYONE_SETS:
if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
return (-1);
if (who[3] != '\0')
return (-1);
break;
default:
return (-1);
}
return (0);
}
int
zfs_deleg_verify_nvlist(nvlist_t *nvp)
{
nvpair_t *who, *perm_name;
nvlist_t *perms;
int error;
if (nvp == NULL)
return (-1);
who = nvlist_next_nvpair(nvp, NULL);
if (who == NULL)
return (-1);
do {
if (zfs_validate_who(nvpair_name(who)))
return (-1);
error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
if (error && error != ENOENT)
return (-1);
if (error == ENOENT)
continue;
perm_name = nvlist_next_nvpair(perms, NULL);
if (perm_name == NULL) {
return (-1);
}
do {
error = zfs_valid_permission_name(
nvpair_name(perm_name));
if (error)
return (-1);
} while (perm_name = nvlist_next_nvpair(perms, perm_name));
} while (who = nvlist_next_nvpair(nvp, who));
return (0);
}
/*
* Construct the base attribute name. The base attribute names
* are the "key" to locate the jump objects which contain the actual
* permissions. The base attribute names are encoded based on
* type of entry and whether it is a local or descendent permission.
*
* Arguments:
* attr - attribute name return string, attribute is assumed to be
* ZFS_MAX_DELEG_NAME long.
* type - type of entry to construct
* inheritchr - inheritance type (local,descendent, or NA for create and
* permission set definitions
* data - is either a permission set name or a 64 bit uid/gid.
*/
void
zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
char inheritchr, void *data)
{
int len = ZFS_MAX_DELEG_NAME;
uint64_t *id = data;
switch (type) {
case ZFS_DELEG_USER:
case ZFS_DELEG_GROUP:
case ZFS_DELEG_USER_SETS:
case ZFS_DELEG_GROUP_SETS:
(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
break;
case ZFS_DELEG_NAMED_SET_SETS:
case ZFS_DELEG_NAMED_SET:
(void) snprintf(attr, len, "%c-%c%s", type,
ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
break;
case ZFS_DELEG_CREATE:
case ZFS_DELEG_CREATE_SETS:
(void) snprintf(attr, len, "%c-%c", type,
ZFS_DELEG_FIELD_SEP_CHR);
break;
case ZFS_DELEG_EVERYONE:
case ZFS_DELEG_EVERYONE_SETS:
(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
ZFS_DELEG_FIELD_SEP_CHR);
break;
default:
ASSERT(!"bad zfs_deleg_who_type_t");
}
}