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 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 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 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 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