[mirror_zfs.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_USEROBJQUOTA},
	{ZFS_DELEG_PERM_GROUPOBJQUOTA},
	{ZFS_DELEG_PERM_USEROBJUSED},
	{ZFS_DELEG_PERM_GROUPOBJUSED},
	{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.
da536844	24	* Copyright (c) 2013 by Delphix. All rights reserved.
34dc7c2f BB	25	*/
34dc7c2f BB	26
da536844 MA	27	#include <sys/zfs_context.h>
da536844 MA	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[] = {
da536844 MA	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},
1de321e6 JX	65	{ZFS_DELEG_PERM_USEROBJQUOTA},
	66	{ZFS_DELEG_PERM_GROUPOBJQUOTA},
	67	{ZFS_DELEG_PERM_USEROBJUSED},
	68	{ZFS_DELEG_PERM_GROUPOBJUSED},
da536844 MA	69	{ZFS_DELEG_PERM_HOLD},
	70	{ZFS_DELEG_PERM_RELEASE},
	71	{NULL}
34dc7c2f BB	72	};
	73
	74	static int
	75	zfs_valid_permission_name(const char *perm)
	76	{
	77	if (zfs_deleg_canonicalize_perm(perm))
	78	return (0);
	79
	80	return (permset_namecheck(perm, NULL, NULL));
	81	}
	82
	83	const char *
	84	zfs_deleg_canonicalize_perm(const char *perm)
	85	{
	86	int i;
	87	zfs_prop_t prop;
	88
	89	for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
	90	if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
	91	return (perm);
	92	}
	93
	94	prop = zfs_name_to_prop(perm);
	95	if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
	96	return (zfs_prop_to_name(prop));
	97	return (NULL);
	98
	99	}
	100
	101	static int
	102	zfs_validate_who(char *who)
	103	{
	104	char *p;
	105
	106	if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
	107	return (-1);
	108
	109	switch (who[0]) {
	110	case ZFS_DELEG_USER:
	111	case ZFS_DELEG_GROUP:
	112	case ZFS_DELEG_USER_SETS:
	113	case ZFS_DELEG_GROUP_SETS:
	114	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
	115	return (-1);
	116	for (p = &who[3]; *p; p++)
	117	if (!isdigit(*p))
	118	return (-1);
	119	break;
	120
	121	case ZFS_DELEG_NAMED_SET:
	122	case ZFS_DELEG_NAMED_SET_SETS:
	123	if (who[1] != ZFS_DELEG_NA)
	124	return (-1);
	125	return (permset_namecheck(&who[3], NULL, NULL));
	126
	127	case ZFS_DELEG_CREATE:
	128	case ZFS_DELEG_CREATE_SETS:
	129	if (who[1] != ZFS_DELEG_NA)
	130	return (-1);
	131	if (who[3] != '\0')
	132	return (-1);
	133	break;
	134
	135	case ZFS_DELEG_EVERYONE:
136	case ZFS_DELEG_EVERYONE_SETS:
137	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
138	return (-1);
139	if (who[3] != '\0')
140	return (-1);
141	break;
142
143	default:
144	return (-1);
145	}
146
147	return (0);
148	}
149
150	int
151	zfs_deleg_verify_nvlist(nvlist_t *nvp)
152	{
153	nvpair_t who, perm_name;
154	nvlist_t *perms;
155	int error;
156
157	if (nvp == NULL)
158	return (-1);
159
160	who = nvlist_next_nvpair(nvp, NULL);
161	if (who == NULL)
162	return (-1);
163
164	do {
165	if (zfs_validate_who(nvpair_name(who)))
166	return (-1);
167
168	error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
169
170	if (error && error != ENOENT)
171	return (-1);
172	if (error == ENOENT)
173	continue;
174
175	perm_name = nvlist_next_nvpair(perms, NULL);
176	if (perm_name == NULL) {
177	return (-1);
178	}
179	do {
180	error = zfs_valid_permission_name(
181	nvpair_name(perm_name));
182	if (error)
183	return (-1);
c65aa5b2 BB	184	} while ((perm_name = nvlist_next_nvpair(perms, perm_name)));
c65aa5b2 BB	185	} while ((who = nvlist_next_nvpair(nvp, who)));
34dc7c2f BB	186	return (0);
	187	}
	188
	189	/*
	190	* Construct the base attribute name. The base attribute names
	191	* are the "key" to locate the jump objects which contain the actual
	192	* permissions. The base attribute names are encoded based on
	193	* type of entry and whether it is a local or descendent permission.
	194	*
	195	* Arguments:
	196	* attr - attribute name return string, attribute is assumed to be
	197	* ZFS_MAX_DELEG_NAME long.
	198	* type - type of entry to construct
	199	* inheritchr - inheritance type (local,descendent, or NA for create and
	200	* permission set definitions
	201	* data - is either a permission set name or a 64 bit uid/gid.
	202	*/
	203	void
	204	zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
	205	char inheritchr, void *data)
	206	{
	207	int len = ZFS_MAX_DELEG_NAME;
	208	uint64_t *id = data;
	209
	210	switch (type) {
	211	case ZFS_DELEG_USER:
	212	case ZFS_DELEG_GROUP:
	213	case ZFS_DELEG_USER_SETS:
	214	case ZFS_DELEG_GROUP_SETS:
	215	(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
	216	ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
	217	break;
	218	case ZFS_DELEG_NAMED_SET_SETS:
	219	case ZFS_DELEG_NAMED_SET:
	220	(void) snprintf(attr, len, "%c-%c%s", type,
	221	ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
	222	break;
	223	case ZFS_DELEG_CREATE:
	224	case ZFS_DELEG_CREATE_SETS:
	225	(void) snprintf(attr, len, "%c-%c", type,
	226	ZFS_DELEG_FIELD_SEP_CHR);
	227	break;
	228	case ZFS_DELEG_EVERYONE:
	229	case ZFS_DELEG_EVERYONE_SETS:
	230	(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
	231	ZFS_DELEG_FIELD_SEP_CHR);
	232	break;
	233	default:
989fd514	234	cmn_err(CE_PANIC, "bad zfs_deleg_who_type_t %d", type);
34dc7c2f BB	235	}
34dc7c2f BB	236	}
c28b2279 BB	237
	238	#if defined(_KERNEL) && defined(HAVE_SPL)
	239	EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
	240	EXPORT_SYMBOL(zfs_deleg_whokey);
	241	EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
	242	#endif