[mirror_zfs-debian.git] / module / zcommon / 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 (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
 * Copyright (c) 2013 by Delphix. All rights reserved.
 */

#include <sys/zfs_context.h>

#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
#include <sys/dsl_deleg.h>
#include "zfs_prop.h"
#include "zfs_deleg.h"
#include "zfs_namecheck.h"

zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
	{ZFS_DELEG_PERM_ALLOW},
	{ZFS_DELEG_PERM_BOOKMARK},
	{ZFS_DELEG_PERM_CLONE},
	{ZFS_DELEG_PERM_CREATE},
	{ZFS_DELEG_PERM_DESTROY},
	{ZFS_DELEG_PERM_DIFF},
	{ZFS_DELEG_PERM_MOUNT},
	{ZFS_DELEG_PERM_PROMOTE},
	{ZFS_DELEG_PERM_RECEIVE},
	{ZFS_DELEG_PERM_RENAME},
	{ZFS_DELEG_PERM_ROLLBACK},
	{ZFS_DELEG_PERM_SNAPSHOT},
	{ZFS_DELEG_PERM_SHARE},
	{ZFS_DELEG_PERM_SEND},
	{ZFS_DELEG_PERM_USERPROP},
	{ZFS_DELEG_PERM_USERQUOTA},
	{ZFS_DELEG_PERM_GROUPQUOTA},
	{ZFS_DELEG_PERM_USERUSED},
	{ZFS_DELEG_PERM_GROUPUSED},
	{ZFS_DELEG_PERM_HOLD},
	{ZFS_DELEG_PERM_RELEASE},
	{NULL}
};

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:
		cmn_err(CE_PANIC, "bad zfs_deleg_who_type_t %d", type);
	}
}

#if defined(_KERNEL) && defined(HAVE_SPL)
EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
EXPORT_SYMBOL(zfs_deleg_whokey);
EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
#endif
Commit	Line	Data
34dc7c2f BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21	/*
572e2857	22	* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
0b7936d5	23	* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
ea04106b	24	* Copyright (c) 2013 by Delphix. All rights reserved.
34dc7c2f BB	25	*/
34dc7c2f BB	26
ea04106b AX	27	#include <sys/zfs_context.h>
ea04106b AX	28
34dc7c2f BB	29	#if defined(_KERNEL)
	30	#include <sys/systm.h>
	31	#include <sys/sunddi.h>
	32	#include <sys/ctype.h>
	33	#else
	34	#include <stdio.h>
	35	#include <unistd.h>
	36	#include <strings.h>
	37	#include <libnvpair.h>
	38	#include <ctype.h>
	39	#endif
34dc7c2f BB	40	#include <sys/dsl_deleg.h>
	41	#include "zfs_prop.h"
	42	#include "zfs_deleg.h"
	43	#include "zfs_namecheck.h"
	44
34dc7c2f	45	zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
ea04106b AX	46	{ZFS_DELEG_PERM_ALLOW},
	47	{ZFS_DELEG_PERM_BOOKMARK},
	48	{ZFS_DELEG_PERM_CLONE},
	49	{ZFS_DELEG_PERM_CREATE},
	50	{ZFS_DELEG_PERM_DESTROY},
	51	{ZFS_DELEG_PERM_DIFF},
	52	{ZFS_DELEG_PERM_MOUNT},
	53	{ZFS_DELEG_PERM_PROMOTE},
	54	{ZFS_DELEG_PERM_RECEIVE},
	55	{ZFS_DELEG_PERM_RENAME},
	56	{ZFS_DELEG_PERM_ROLLBACK},
	57	{ZFS_DELEG_PERM_SNAPSHOT},
	58	{ZFS_DELEG_PERM_SHARE},
	59	{ZFS_DELEG_PERM_SEND},
	60	{ZFS_DELEG_PERM_USERPROP},
	61	{ZFS_DELEG_PERM_USERQUOTA},
	62	{ZFS_DELEG_PERM_GROUPQUOTA},
	63	{ZFS_DELEG_PERM_USERUSED},
	64	{ZFS_DELEG_PERM_GROUPUSED},
	65	{ZFS_DELEG_PERM_HOLD},
	66	{ZFS_DELEG_PERM_RELEASE},
	67	{NULL}
34dc7c2f BB	68	};
	69
	70	static int
	71	zfs_valid_permission_name(const char *perm)
	72	{
	73	if (zfs_deleg_canonicalize_perm(perm))
	74	return (0);
	75
	76	return (permset_namecheck(perm, NULL, NULL));
	77	}
	78
	79	const char *
	80	zfs_deleg_canonicalize_perm(const char *perm)
	81	{
	82	int i;
	83	zfs_prop_t prop;
	84
	85	for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
	86	if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
	87	return (perm);
	88	}
	89
	90	prop = zfs_name_to_prop(perm);
	91	if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
	92	return (zfs_prop_to_name(prop));
	93	return (NULL);
	94
	95	}
	96
	97	static int
	98	zfs_validate_who(char *who)
	99	{
	100	char *p;
	101
	102	if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
	103	return (-1);
	104
	105	switch (who[0]) {
	106	case ZFS_DELEG_USER:
	107	case ZFS_DELEG_GROUP:
	108	case ZFS_DELEG_USER_SETS:
	109	case ZFS_DELEG_GROUP_SETS:
	110	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
	111	return (-1);
	112	for (p = &who[3]; *p; p++)
	113	if (!isdigit(*p))
	114	return (-1);
	115	break;
	116
	117	case ZFS_DELEG_NAMED_SET:
	118	case ZFS_DELEG_NAMED_SET_SETS:
	119	if (who[1] != ZFS_DELEG_NA)
	120	return (-1);
	121	return (permset_namecheck(&who[3], NULL, NULL));
	122
	123	case ZFS_DELEG_CREATE:
	124	case ZFS_DELEG_CREATE_SETS:
	125	if (who[1] != ZFS_DELEG_NA)
	126	return (-1);
	127	if (who[3] != '\0')
	128	return (-1);
	129	break;
	130
	131	case ZFS_DELEG_EVERYONE:
132	case ZFS_DELEG_EVERYONE_SETS:
133	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
134	return (-1);
135	if (who[3] != '\0')
136	return (-1);
137	break;
138
139	default:
140	return (-1);
141	}
142
143	return (0);
144	}
145
146	int
147	zfs_deleg_verify_nvlist(nvlist_t *nvp)
148	{
149	nvpair_t who, perm_name;
150	nvlist_t *perms;
151	int error;
152
153	if (nvp == NULL)
154	return (-1);
155
156	who = nvlist_next_nvpair(nvp, NULL);
157	if (who == NULL)
158	return (-1);
159
160	do {
161	if (zfs_validate_who(nvpair_name(who)))
162	return (-1);
163
164	error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
165
166	if (error && error != ENOENT)
167	return (-1);
168	if (error == ENOENT)
169	continue;
170
171	perm_name = nvlist_next_nvpair(perms, NULL);
172	if (perm_name == NULL) {
173	return (-1);
174	}
175	do {
176	error = zfs_valid_permission_name(
177	nvpair_name(perm_name));
178	if (error)
179	return (-1);
c65aa5b2 BB	180	} while ((perm_name = nvlist_next_nvpair(perms, perm_name)));
c65aa5b2 BB	181	} while ((who = nvlist_next_nvpair(nvp, who)));
34dc7c2f BB	182	return (0);
	183	}
	184
	185	/*
	186	* Construct the base attribute name. The base attribute names
	187	* are the "key" to locate the jump objects which contain the actual
	188	* permissions. The base attribute names are encoded based on
	189	* type of entry and whether it is a local or descendent permission.
	190	*
	191	* Arguments:
	192	* attr - attribute name return string, attribute is assumed to be
	193	* ZFS_MAX_DELEG_NAME long.
	194	* type - type of entry to construct
	195	* inheritchr - inheritance type (local,descendent, or NA for create and
	196	* permission set definitions
	197	* data - is either a permission set name or a 64 bit uid/gid.
	198	*/
	199	void
	200	zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
	201	char inheritchr, void *data)
	202	{
	203	int len = ZFS_MAX_DELEG_NAME;
	204	uint64_t *id = data;
	205
	206	switch (type) {
	207	case ZFS_DELEG_USER:
	208	case ZFS_DELEG_GROUP:
	209	case ZFS_DELEG_USER_SETS:
	210	case ZFS_DELEG_GROUP_SETS:
	211	(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
	212	ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
	213	break;
	214	case ZFS_DELEG_NAMED_SET_SETS:
	215	case ZFS_DELEG_NAMED_SET:
	216	(void) snprintf(attr, len, "%c-%c%s", type,
	217	ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
	218	break;
	219	case ZFS_DELEG_CREATE:
	220	case ZFS_DELEG_CREATE_SETS:
	221	(void) snprintf(attr, len, "%c-%c", type,
	222	ZFS_DELEG_FIELD_SEP_CHR);
	223	break;
	224	case ZFS_DELEG_EVERYONE:
	225	case ZFS_DELEG_EVERYONE_SETS:
	226	(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
	227	ZFS_DELEG_FIELD_SEP_CHR);
	228	break;
	229	default:
ea04106b	230	cmn_err(CE_PANIC, "bad zfs_deleg_who_type_t %d", type);
34dc7c2f BB	231	}
34dc7c2f BB	232	}
c28b2279 BB	233
	234	#if defined(_KERNEL) && defined(HAVE_SPL)
	235	EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
	236	EXPORT_SYMBOL(zfs_deleg_whokey);
	237	EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
	238	#endif