[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, 2015 by Delphix. All rights reserved.
 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
 */

#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_REMAP},
	{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},
	{ZFS_DELEG_PERM_LOAD_KEY},
	{ZFS_DELEG_PERM_CHANGE_KEY},
	{ZFS_DELEG_PERM_PROJECTUSED},
	{ZFS_DELEG_PERM_PROJECTQUOTA},
	{ZFS_DELEG_PERM_PROJECTOBJUSED},
	{ZFS_DELEG_PERM_PROJECTOBJQUOTA},
	{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))
		    != NULL);
	} while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
	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");
	}
}

#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.
a1d477c2	24	* Copyright (c) 2013, 2015 by Delphix. All rights reserved.
23d70cde	25	* Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
34dc7c2f BB	26	*/
34dc7c2f BB	27
da536844 MA	28	#include <sys/zfs_context.h>
da536844 MA	29
34dc7c2f BB	30	#if defined(_KERNEL)
	31	#include <sys/systm.h>
	32	#include <sys/sunddi.h>
	33	#include <sys/ctype.h>
	34	#else
	35	#include <stdio.h>
	36	#include <unistd.h>
	37	#include <strings.h>
	38	#include <libnvpair.h>
	39	#include <ctype.h>
	40	#endif
34dc7c2f BB	41	#include <sys/dsl_deleg.h>
	42	#include "zfs_prop.h"
	43	#include "zfs_deleg.h"
	44	#include "zfs_namecheck.h"
	45
34dc7c2f	46	zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
da536844 MA	47	{ZFS_DELEG_PERM_ALLOW},
	48	{ZFS_DELEG_PERM_BOOKMARK},
	49	{ZFS_DELEG_PERM_CLONE},
	50	{ZFS_DELEG_PERM_CREATE},
	51	{ZFS_DELEG_PERM_DESTROY},
	52	{ZFS_DELEG_PERM_DIFF},
	53	{ZFS_DELEG_PERM_MOUNT},
	54	{ZFS_DELEG_PERM_PROMOTE},
	55	{ZFS_DELEG_PERM_RECEIVE},
a1d477c2	56	{ZFS_DELEG_PERM_REMAP},
da536844 MA	57	{ZFS_DELEG_PERM_RENAME},
	58	{ZFS_DELEG_PERM_ROLLBACK},
	59	{ZFS_DELEG_PERM_SNAPSHOT},
	60	{ZFS_DELEG_PERM_SHARE},
	61	{ZFS_DELEG_PERM_SEND},
	62	{ZFS_DELEG_PERM_USERPROP},
	63	{ZFS_DELEG_PERM_USERQUOTA},
	64	{ZFS_DELEG_PERM_GROUPQUOTA},
	65	{ZFS_DELEG_PERM_USERUSED},
	66	{ZFS_DELEG_PERM_GROUPUSED},
1de321e6 JX	67	{ZFS_DELEG_PERM_USEROBJQUOTA},
	68	{ZFS_DELEG_PERM_GROUPOBJQUOTA},
	69	{ZFS_DELEG_PERM_USEROBJUSED},
	70	{ZFS_DELEG_PERM_GROUPOBJUSED},
da536844 MA	71	{ZFS_DELEG_PERM_HOLD},
da536844 MA	72	{ZFS_DELEG_PERM_RELEASE},
b5256303 TC	73	{ZFS_DELEG_PERM_LOAD_KEY},
b5256303 TC	74	{ZFS_DELEG_PERM_CHANGE_KEY},
9c5167d1 NF	75	{ZFS_DELEG_PERM_PROJECTUSED},
	76	{ZFS_DELEG_PERM_PROJECTQUOTA},
	77	{ZFS_DELEG_PERM_PROJECTOBJUSED},
	78	{ZFS_DELEG_PERM_PROJECTOBJQUOTA},
da536844	79	{NULL}
34dc7c2f BB	80	};
	81
	82	static int
	83	zfs_valid_permission_name(const char *perm)
	84	{
	85	if (zfs_deleg_canonicalize_perm(perm))
	86	return (0);
	87
	88	return (permset_namecheck(perm, NULL, NULL));
	89	}
	90
	91	const char *
	92	zfs_deleg_canonicalize_perm(const char *perm)
	93	{
	94	int i;
	95	zfs_prop_t prop;
	96
	97	for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
	98	if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
	99	return (perm);
	100	}
	101
	102	prop = zfs_name_to_prop(perm);
	103	if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
	104	return (zfs_prop_to_name(prop));
	105	return (NULL);
	106
	107	}
	108
	109	static int
	110	zfs_validate_who(char *who)
	111	{
	112	char *p;
	113
	114	if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
	115	return (-1);
	116
	117	switch (who[0]) {
	118	case ZFS_DELEG_USER:
	119	case ZFS_DELEG_GROUP:
	120	case ZFS_DELEG_USER_SETS:
	121	case ZFS_DELEG_GROUP_SETS:
	122	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
	123	return (-1);
	124	for (p = &who[3]; *p; p++)
	125	if (!isdigit(*p))
	126	return (-1);
	127	break;
	128
	129	case ZFS_DELEG_NAMED_SET:
	130	case ZFS_DELEG_NAMED_SET_SETS:
	131	if (who[1] != ZFS_DELEG_NA)
	132	return (-1);
	133	return (permset_namecheck(&who[3], NULL, NULL));
	134
	135	case ZFS_DELEG_CREATE:
	136	case ZFS_DELEG_CREATE_SETS:
	137	if (who[1] != ZFS_DELEG_NA)
	138	return (-1);
	139	if (who[3] != '\0')
	140	return (-1);
	141	break;
	142
	143	case ZFS_DELEG_EVERYONE:
144	case ZFS_DELEG_EVERYONE_SETS:
145	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
146	return (-1);
147	if (who[3] != '\0')
148	return (-1);
149	break;
150
151	default:
152	return (-1);
153	}
154
155	return (0);
156	}
157
158	int
159	zfs_deleg_verify_nvlist(nvlist_t *nvp)
160	{
161	nvpair_t who, perm_name;
162	nvlist_t *perms;
163	int error;
164
165	if (nvp == NULL)
166	return (-1);
167
168	who = nvlist_next_nvpair(nvp, NULL);
169	if (who == NULL)
170	return (-1);
171
172	do {
173	if (zfs_validate_who(nvpair_name(who)))
174	return (-1);
175
176	error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
177
178	if (error && error != ENOENT)
179	return (-1);
180	if (error == ENOENT)
181	continue;
182
183	perm_name = nvlist_next_nvpair(perms, NULL);
184	if (perm_name == NULL) {
185	return (-1);
186	}
187	do {
188	error = zfs_valid_permission_name(
189	nvpair_name(perm_name));
190	if (error)
191	return (-1);
23d70cde GM	192	} while ((perm_name = nvlist_next_nvpair(perms, perm_name))
	193	!= NULL);
	194	} while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
34dc7c2f BB	195	return (0);
	196	}
	197
	198	/*
	199	* Construct the base attribute name. The base attribute names
	200	* are the "key" to locate the jump objects which contain the actual
	201	* permissions. The base attribute names are encoded based on
	202	* type of entry and whether it is a local or descendent permission.
	203	*
	204	* Arguments:
	205	* attr - attribute name return string, attribute is assumed to be
	206	* ZFS_MAX_DELEG_NAME long.
	207	* type - type of entry to construct
	208	* inheritchr - inheritance type (local,descendent, or NA for create and
	209	* permission set definitions
	210	* data - is either a permission set name or a 64 bit uid/gid.
	211	*/
	212	void
	213	zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
	214	char inheritchr, void *data)
	215	{
	216	int len = ZFS_MAX_DELEG_NAME;
	217	uint64_t *id = data;
	218
	219	switch (type) {
	220	case ZFS_DELEG_USER:
	221	case ZFS_DELEG_GROUP:
	222	case ZFS_DELEG_USER_SETS:
	223	case ZFS_DELEG_GROUP_SETS:
	224	(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
	225	ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
	226	break;
	227	case ZFS_DELEG_NAMED_SET_SETS:
	228	case ZFS_DELEG_NAMED_SET:
	229	(void) snprintf(attr, len, "%c-%c%s", type,
	230	ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
	231	break;
	232	case ZFS_DELEG_CREATE:
	233	case ZFS_DELEG_CREATE_SETS:
	234	(void) snprintf(attr, len, "%c-%c", type,
	235	ZFS_DELEG_FIELD_SEP_CHR);
	236	break;
	237	case ZFS_DELEG_EVERYONE:
	238	case ZFS_DELEG_EVERYONE_SETS:
	239	(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
	240	ZFS_DELEG_FIELD_SEP_CHR);
	241	break;
	242	default:
46364cb2	243	ASSERT(!"bad zfs_deleg_who_type_t");
34dc7c2f BB	244	}
34dc7c2f BB	245	}
c28b2279 BB	246
	247	#if defined(_KERNEL) && defined(HAVE_SPL)
	248	EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
	249	EXPORT_SYMBOL(zfs_deleg_whokey);
	250	EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
	251	#endif