[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.
 */

#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_SEND },
	{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 },
	{ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
	{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");
	}
}

#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.
34dc7c2f BB	24	*/
34dc7c2f BB	25
34dc7c2f BB	26	#if defined(_KERNEL)
	27	#include <sys/systm.h>
	28	#include <sys/sunddi.h>
	29	#include <sys/ctype.h>
	30	#else
	31	#include <stdio.h>
	32	#include <unistd.h>
	33	#include <strings.h>
	34	#include <libnvpair.h>
	35	#include <ctype.h>
	36	#endif
	37	/* XXX includes zfs_context.h, so why bother with the above? */
	38	#include <sys/dsl_deleg.h>
	39	#include "zfs_prop.h"
	40	#include "zfs_deleg.h"
	41	#include "zfs_namecheck.h"
	42
	43	/*
	44	* permission table
	45	*
	46	* Keep this table in sorted order
	47	*
	48	* This table is used for displaying all permissions for
	49	* zfs allow
	50	*/
	51
	52	zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
	53	{ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW},
	54	{ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
	55	{ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
	56	{ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
	57	{ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
	58	{ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
	59	{ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
	60	{ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
	61	{ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
	62	{ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
	63	{ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
0b7936d5	64	{ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_SEND },
34dc7c2f	65	{ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
9babb374 BB	66	{ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
	67	{ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
	68	{ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
	69	{ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
45d1cae3 BB	70	{ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
45d1cae3 BB	71	{ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
572e2857	72	{ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
34dc7c2f BB	73	{NULL, ZFS_DELEG_NOTE_NONE }
	74	};
	75
	76	static int
	77	zfs_valid_permission_name(const char *perm)
	78	{
	79	if (zfs_deleg_canonicalize_perm(perm))
	80	return (0);
	81
	82	return (permset_namecheck(perm, NULL, NULL));
	83	}
	84
	85	const char *
	86	zfs_deleg_canonicalize_perm(const char *perm)
	87	{
	88	int i;
	89	zfs_prop_t prop;
	90
	91	for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
	92	if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
	93	return (perm);
	94	}
	95
	96	prop = zfs_name_to_prop(perm);
	97	if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
	98	return (zfs_prop_to_name(prop));
	99	return (NULL);
	100
	101	}
	102
	103	static int
	104	zfs_validate_who(char *who)
	105	{
	106	char *p;
	107
	108	if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
	109	return (-1);
	110
	111	switch (who[0]) {
	112	case ZFS_DELEG_USER:
	113	case ZFS_DELEG_GROUP:
	114	case ZFS_DELEG_USER_SETS:
	115	case ZFS_DELEG_GROUP_SETS:
	116	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
	117	return (-1);
	118	for (p = &who[3]; *p; p++)
	119	if (!isdigit(*p))
	120	return (-1);
	121	break;
	122
	123	case ZFS_DELEG_NAMED_SET:
	124	case ZFS_DELEG_NAMED_SET_SETS:
	125	if (who[1] != ZFS_DELEG_NA)
	126	return (-1);
	127	return (permset_namecheck(&who[3], NULL, NULL));
	128
	129	case ZFS_DELEG_CREATE:
	130	case ZFS_DELEG_CREATE_SETS:
	131	if (who[1] != ZFS_DELEG_NA)
	132	return (-1);
	133	if (who[3] != '\0')
	134	return (-1);
	135	break;
	136
137	case ZFS_DELEG_EVERYONE:
138	case ZFS_DELEG_EVERYONE_SETS:
139	if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
140	return (-1);
141	if (who[3] != '\0')
142	return (-1);
143	break;
144
145	default:
146	return (-1);
147	}
148
149	return (0);
150	}
151
152	int
153	zfs_deleg_verify_nvlist(nvlist_t *nvp)
154	{
155	nvpair_t who, perm_name;
156	nvlist_t *perms;
157	int error;
158
159	if (nvp == NULL)
160	return (-1);
161
162	who = nvlist_next_nvpair(nvp, NULL);
163	if (who == NULL)
164	return (-1);
165
166	do {
167	if (zfs_validate_who(nvpair_name(who)))
168	return (-1);
169
170	error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
171
172	if (error && error != ENOENT)
173	return (-1);
174	if (error == ENOENT)
175	continue;
176
177	perm_name = nvlist_next_nvpair(perms, NULL);
178	if (perm_name == NULL) {
179	return (-1);
180	}
181	do {
182	error = zfs_valid_permission_name(
183	nvpair_name(perm_name));
184	if (error)
185	return (-1);
c65aa5b2 BB	186	} while ((perm_name = nvlist_next_nvpair(perms, perm_name)));
c65aa5b2 BB	187	} while ((who = nvlist_next_nvpair(nvp, who)));
34dc7c2f BB	188	return (0);
	189	}
	190
	191	/*
	192	* Construct the base attribute name. The base attribute names
	193	* are the "key" to locate the jump objects which contain the actual
	194	* permissions. The base attribute names are encoded based on
	195	* type of entry and whether it is a local or descendent permission.
	196	*
	197	* Arguments:
	198	* attr - attribute name return string, attribute is assumed to be
	199	* ZFS_MAX_DELEG_NAME long.
	200	* type - type of entry to construct
	201	* inheritchr - inheritance type (local,descendent, or NA for create and
	202	* permission set definitions
	203	* data - is either a permission set name or a 64 bit uid/gid.
	204	*/
	205	void
	206	zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
	207	char inheritchr, void *data)
	208	{
	209	int len = ZFS_MAX_DELEG_NAME;
	210	uint64_t *id = data;
	211
	212	switch (type) {
	213	case ZFS_DELEG_USER:
	214	case ZFS_DELEG_GROUP:
	215	case ZFS_DELEG_USER_SETS:
	216	case ZFS_DELEG_GROUP_SETS:
	217	(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
	218	ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
	219	break;
	220	case ZFS_DELEG_NAMED_SET_SETS:
	221	case ZFS_DELEG_NAMED_SET:
	222	(void) snprintf(attr, len, "%c-%c%s", type,
	223	ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
	224	break;
	225	case ZFS_DELEG_CREATE:
	226	case ZFS_DELEG_CREATE_SETS:
	227	(void) snprintf(attr, len, "%c-%c", type,
	228	ZFS_DELEG_FIELD_SEP_CHR);
	229	break;
	230	case ZFS_DELEG_EVERYONE:
	231	case ZFS_DELEG_EVERYONE_SETS:
	232	(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
	233	ZFS_DELEG_FIELD_SEP_CHR);
	234	break;
	235	default:
	236	ASSERT(!"bad zfs_deleg_who_type_t");
	237	}
	238	}
c28b2279 BB	239
	240	#if defined(_KERNEL) && defined(HAVE_SPL)
	241	EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
	242	EXPORT_SYMBOL(zfs_deleg_whokey);
	243	EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
	244	#endif