[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 https://opensource.org/licenses/CDDL-1.0.
 * 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/sunddi.h>
#include <sys/ctype.h>
#else
#include <stdio.h>
#include <unistd.h>
#include <libnvpair.h>
#include <ctype.h>
#endif
#include <sys/string.h>
#include <sys/dsl_deleg.h>
#include "zfs_prop.h"
#include "zfs_deleg.h"
#include "zfs_namecheck.h"

const 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},
	{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)
{
	for (int i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
		if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
			return (perm);
	}

	zfs_prop_t 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(const char *who)
{
	const 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)
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
1d3ba0bf	9	* or https://opensource.org/licenses/CDDL-1.0.
34dc7c2f BB	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	30	#if defined(_KERNEL)
34dc7c2f BB	31	#include <sys/sunddi.h>
	32	#include <sys/ctype.h>
	33	#else
	34	#include <stdio.h>
	35	#include <unistd.h>
34dc7c2f BB	36	#include <libnvpair.h>
	37	#include <ctype.h>
	38	#endif
d465fc58	39	#include <sys/string.h>
34dc7c2f BB	40	#include <sys/dsl_deleg.h>
	41	#include "zfs_prop.h"
	42	#include "zfs_deleg.h"
	43	#include "zfs_namecheck.h"
	44
18168da7	45	const 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},
da536844 MA	70	{ZFS_DELEG_PERM_RELEASE},
b5256303 TC	71	{ZFS_DELEG_PERM_LOAD_KEY},
b5256303 TC	72	{ZFS_DELEG_PERM_CHANGE_KEY},
9c5167d1 NF	73	{ZFS_DELEG_PERM_PROJECTUSED},
	74	{ZFS_DELEG_PERM_PROJECTQUOTA},
	75	{ZFS_DELEG_PERM_PROJECTOBJUSED},
	76	{ZFS_DELEG_PERM_PROJECTOBJQUOTA},
da536844	77	{NULL}
34dc7c2f BB	78	};
	79
	80	static int
	81	zfs_valid_permission_name(const char *perm)
	82	{
	83	if (zfs_deleg_canonicalize_perm(perm))
	84	return (0);
	85
	86	return (permset_namecheck(perm, NULL, NULL));
	87	}
	88
	89	const char *
	90	zfs_deleg_canonicalize_perm(const char *perm)
	91	{
18168da7	92	for (int i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
34dc7c2f BB	93	if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
	94	return (perm);
	95	}
	96
18168da7	97	zfs_prop_t prop = zfs_name_to_prop(perm);
34dc7c2f BB	98	if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
	99	return (zfs_prop_to_name(prop));
	100	return (NULL);
	101
	102	}
	103
	104	static int
d1807f16	105	zfs_validate_who(const char *who)
34dc7c2f	106	{
d1807f16	107	const char *p;
34dc7c2f BB	108
	109	if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
	110	return (-1);
	111
	112	switch (who[0]) {
	113	case ZFS_DELEG_USER:
	114	case ZFS_DELEG_GROUP:
	115	case ZFS_DELEG_USER_SETS:
	116	case ZFS_DELEG_GROUP_SETS:
	117	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
	118	return (-1);
	119	for (p = &who[3]; *p; p++)
	120	if (!isdigit(*p))
	121	return (-1);
	122	break;
	123
	124	case ZFS_DELEG_NAMED_SET:
	125	case ZFS_DELEG_NAMED_SET_SETS:
	126	if (who[1] != ZFS_DELEG_NA)
	127	return (-1);
	128	return (permset_namecheck(&who[3], NULL, NULL));
	129
	130	case ZFS_DELEG_CREATE:
	131	case ZFS_DELEG_CREATE_SETS:
	132	if (who[1] != ZFS_DELEG_NA)
	133	return (-1);
	134	if (who[3] != '\0')
	135	return (-1);
	136	break;
	137
	138	case ZFS_DELEG_EVERYONE:
	139	case ZFS_DELEG_EVERYONE_SETS:
	140	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
	141	return (-1);
	142	if (who[3] != '\0')
	143	return (-1);
	144	break;
	145
	146	default:
	147	return (-1);
	148	}
	149
	150	return (0);
	151	}
	152
	153	int
	154	zfs_deleg_verify_nvlist(nvlist_t *nvp)
	155	{
	156	nvpair_t who, perm_name;
	157	nvlist_t *perms;
	158	int error;
	159
	160	if (nvp == NULL)
	161	return (-1);
	162
	163	who = nvlist_next_nvpair(nvp, NULL);
	164	if (who == NULL)
	165	return (-1);
	166
	167	do {
	168	if (zfs_validate_who(nvpair_name(who)))
	169	return (-1);
	170
	171	error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
172
173	if (error && error != ENOENT)
174	return (-1);
175	if (error == ENOENT)
176	continue;
177
178	perm_name = nvlist_next_nvpair(perms, NULL);
179	if (perm_name == NULL) {
180	return (-1);
181	}
182	do {
183	error = zfs_valid_permission_name(
184	nvpair_name(perm_name));
185	if (error)
186	return (-1);
23d70cde GM	187	} while ((perm_name = nvlist_next_nvpair(perms, perm_name))
	188	!= NULL);
	189	} while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
34dc7c2f BB	190	return (0);
	191	}
	192
	193	/*
	194	* Construct the base attribute name. The base attribute names
	195	* are the "key" to locate the jump objects which contain the actual
	196	* permissions. The base attribute names are encoded based on
	197	* type of entry and whether it is a local or descendent permission.
	198	*
	199	* Arguments:
	200	* attr - attribute name return string, attribute is assumed to be
	201	* ZFS_MAX_DELEG_NAME long.
	202	* type - type of entry to construct
	203	* inheritchr - inheritance type (local,descendent, or NA for create and
	204	* permission set definitions
	205	* data - is either a permission set name or a 64 bit uid/gid.
	206	*/
	207	void
	208	zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
	209	char inheritchr, void *data)
	210	{
	211	int len = ZFS_MAX_DELEG_NAME;
	212	uint64_t *id = data;
	213
	214	switch (type) {
	215	case ZFS_DELEG_USER:
	216	case ZFS_DELEG_GROUP:
	217	case ZFS_DELEG_USER_SETS:
	218	case ZFS_DELEG_GROUP_SETS:
	219	(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
	220	ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
	221	break;
	222	case ZFS_DELEG_NAMED_SET_SETS:
	223	case ZFS_DELEG_NAMED_SET:
	224	(void) snprintf(attr, len, "%c-%c%s", type,
	225	ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
	226	break;
	227	case ZFS_DELEG_CREATE:
	228	case ZFS_DELEG_CREATE_SETS:
	229	(void) snprintf(attr, len, "%c-%c", type,
	230	ZFS_DELEG_FIELD_SEP_CHR);
	231	break;
	232	case ZFS_DELEG_EVERYONE:
	233	case ZFS_DELEG_EVERYONE_SETS:
	234	(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
	235	ZFS_DELEG_FIELD_SEP_CHR);
	236	break;
	237	default:
46364cb2	238	ASSERT(!"bad zfs_deleg_who_type_t");
34dc7c2f BB	239	}
34dc7c2f BB	240	}
c28b2279	241
93ce2b4c	242	#if defined(_KERNEL)
c28b2279 BB	243	EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
	244	EXPORT_SYMBOL(zfs_deleg_whokey);
	245	EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
	246	#endif