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 /*
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #pragma ident "%Z%%M% %I% %E% SMI"
27
28 /*
29 * libfstyp module for zfs
30 */
31 #include <fcntl.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <sys/types.h>
35 #include <unistd.h>
36 #include <libintl.h>
37 #include <locale.h>
38 #include <string.h>
39 #include <libnvpair.h>
40 #include <libzfs.h>
41 #include <libfstyp_module.h>
42 #include <errno.h>
43
44 struct fstyp_zfs {
45 int fd;
46 nvlist_t *config;
47 };
48
49 int fstyp_mod_init(int fd, off_t offset, fstyp_mod_handle_t *handle);
50 void fstyp_mod_fini(fstyp_mod_handle_t handle);
51 int fstyp_mod_ident(fstyp_mod_handle_t handle);
52 int fstyp_mod_get_attr(fstyp_mod_handle_t handle, nvlist_t **attrp);
53
54 int
fstyp_mod_init(int fd,off_t offset,fstyp_mod_handle_t * handle)55 fstyp_mod_init(int fd, off_t offset, fstyp_mod_handle_t *handle)
56 {
57 struct fstyp_zfs *h;
58
59 if (offset != 0) {
60 return (FSTYP_ERR_OFFSET);
61 }
62
63 if ((h = calloc(1, sizeof (struct fstyp_zfs))) == NULL) {
64 return (FSTYP_ERR_NOMEM);
65 }
66 h->fd = fd;
67
68 *handle = (fstyp_mod_handle_t)h;
69 return (0);
70 }
71
72 void
fstyp_mod_fini(fstyp_mod_handle_t handle)73 fstyp_mod_fini(fstyp_mod_handle_t handle)
74 {
75 struct fstyp_zfs *h = (struct fstyp_zfs *)handle;
76
77 if (h->config != NULL) {
78 nvlist_free(h->config);
79 }
80 free(h);
81 }
82
83 int
fstyp_mod_ident(fstyp_mod_handle_t handle)84 fstyp_mod_ident(fstyp_mod_handle_t handle)
85 {
86 struct fstyp_zfs *h = (struct fstyp_zfs *)handle;
87 uint64_t state;
88 char *str;
89 uint64_t u64;
90 char buf[64];
91
92 if (zpool_read_label(h->fd, &h->config) != 0 ||
93 h->config == NULL) {
94 return (FSTYP_ERR_NO_MATCH);
95 }
96
97 if (nvlist_lookup_uint64(h->config, ZPOOL_CONFIG_POOL_STATE,
98 &state) != 0 || state == POOL_STATE_DESTROYED) {
99 nvlist_free(h->config);
100 h->config = NULL;
101 return (FSTYP_ERR_NO_MATCH);
102 }
103
104 /* add generic attributes */
105 (void) nvlist_add_boolean_value(h->config, "gen_clean", B_TRUE);
106 if (nvlist_lookup_uint64(h->config, "guid", &u64) == 0) {
107 (void) snprintf(buf, sizeof (buf), "%llu", (u_longlong_t)u64);
108 (void) nvlist_add_string(h->config, "gen_guid", buf);
109 }
110 if (nvlist_lookup_uint64(h->config, "version", &u64) == 0) {
111 (void) snprintf(buf, sizeof (buf), "%llu", (u_longlong_t)u64);
112 (void) nvlist_add_string(h->config, "gen_version", buf);
113 }
114 if (nvlist_lookup_string(h->config, "name", &str) == 0) {
115 (void) nvlist_add_string(h->config, "gen_volume_label", str);
116 }
117
118 return (0);
119 }
120
121 int
fstyp_mod_get_attr(fstyp_mod_handle_t handle,nvlist_t ** attrp)122 fstyp_mod_get_attr(fstyp_mod_handle_t handle, nvlist_t **attrp)
123 {
124 struct fstyp_zfs *h = (struct fstyp_zfs *)handle;
125
126 *attrp = h->config;
127 return (0);
128 }
129