1 /* 2 * 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <string.h> 31 #include <errno.h> 32 #include <ctype.h> 33 #include <alloca.h> 34 #include <limits.h> 35 #include <fm/topo_mod.h> 36 #include <sys/param.h> 37 #include <sys/systeminfo.h> 38 #include <sys/fm/protocol.h> 39 #include <sys/stat.h> 40 41 #include <topo_method.h> 42 #include <topo_subr.h> 43 #include <libzfs.h> 44 #include <zfs.h> 45 46 static int zfs_enum(topo_mod_t *, tnode_t *, const char *, topo_instance_t, 47 topo_instance_t, void *, void *); 48 static void zfs_rele(topo_mod_t *, tnode_t *); 49 static int zfs_fmri_nvl2str(topo_mod_t *, tnode_t *, topo_version_t, 50 nvlist_t *, nvlist_t **); 51 52 const topo_method_t zfs_methods[] = { 53 { TOPO_METH_NVL2STR, TOPO_METH_NVL2STR_DESC, TOPO_METH_NVL2STR_VERSION, 54 TOPO_STABILITY_INTERNAL, zfs_fmri_nvl2str }, 55 { NULL } 56 }; 57 58 static const topo_modops_t zfs_ops = 59 { zfs_enum, zfs_rele }; 60 static const topo_modinfo_t zfs_info = 61 { ZFS, FM_FMRI_SCHEME_ZFS, ZFS_VERSION, &zfs_ops }; 62 63 static libzfs_handle_t *g_zfs; 64 65 int 66 zfs_init(topo_mod_t *mod, topo_version_t version) 67 { 68 /* 69 * Turn on module debugging output 70 */ 71 if (getenv("TOPOZFSDEBUG")) 72 topo_mod_setdebug(mod); 73 74 topo_mod_dprintf(mod, "initializing zfs builtin\n"); 75 76 if (version != ZFS_VERSION) 77 return (topo_mod_seterrno(mod, EMOD_VER_NEW)); 78 79 if (topo_mod_register(mod, &zfs_info, TOPO_VERSION) != 0) { 80 topo_mod_dprintf(mod, "failed to register zfs: " 81 "%s\n", topo_mod_errmsg(mod)); 82 return (-1); /* mod errno already set */ 83 } 84 if (!g_zfs) 85 g_zfs = libzfs_init(); 86 87 return (0); 88 } 89 90 void 91 zfs_fini(topo_mod_t *mod) 92 { 93 if (g_zfs) { 94 libzfs_fini(g_zfs); 95 g_zfs = NULL; 96 } 97 topo_mod_unregister(mod); 98 } 99 100 101 /*ARGSUSED*/ 102 int 103 zfs_enum(topo_mod_t *mod, tnode_t *pnode, const char *name, topo_instance_t min, 104 topo_instance_t max, void *notused1, void *notused2) 105 { 106 (void) topo_method_register(mod, pnode, zfs_methods); 107 return (0); 108 } 109 110 /*ARGSUSED*/ 111 static void 112 zfs_rele(topo_mod_t *mp, tnode_t *node) 113 { 114 topo_method_unregister_all(mp, node); 115 } 116 117 typedef struct cbdata { 118 uint64_t cb_guid; 119 zpool_handle_t *cb_pool; 120 } cbdata_t; 121 122 static int 123 find_pool(zpool_handle_t *zhp, void *data) 124 { 125 cbdata_t *cbp = data; 126 127 if (zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL) == cbp->cb_guid) { 128 cbp->cb_pool = zhp; 129 return (1); 130 } 131 132 zpool_close(zhp); 133 134 return (0); 135 } 136 137 static ssize_t 138 fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen) 139 { 140 uint64_t pool_guid, vdev_guid; 141 cbdata_t cb; 142 ssize_t len; 143 const char *name; 144 char guidbuf[64]; 145 146 (void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid); 147 148 /* 149 * Attempt to convert the pool guid to a name. 150 */ 151 cb.cb_guid = pool_guid; 152 cb.cb_pool = NULL; 153 154 if (g_zfs != NULL && zpool_iter(g_zfs, find_pool, &cb) == 1) { 155 name = zpool_get_name(cb.cb_pool); 156 } else { 157 (void) snprintf(guidbuf, sizeof (guidbuf), "%llx", pool_guid); 158 name = guidbuf; 159 } 160 161 if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) == 0) 162 len = snprintf(buf, buflen, "%s://pool=%s/vdev=%llx", 163 FM_FMRI_SCHEME_ZFS, name, vdev_guid); 164 else 165 len = snprintf(buf, buflen, "%s://pool=%s", 166 FM_FMRI_SCHEME_ZFS, name); 167 168 if (cb.cb_pool) 169 zpool_close(cb.cb_pool); 170 171 return (len); 172 } 173 174 /*ARGSUSED*/ 175 static int 176 zfs_fmri_nvl2str(topo_mod_t *mod, tnode_t *node, topo_version_t version, 177 nvlist_t *nvl, nvlist_t **out) 178 { 179 ssize_t len; 180 char *name = NULL; 181 nvlist_t *fmristr; 182 183 if (version > TOPO_METH_NVL2STR_VERSION) 184 return (topo_mod_seterrno(mod, EMOD_VER_NEW)); 185 186 if ((len = fmri_nvl2str(nvl, NULL, 0)) == 0 || 187 (name = topo_mod_alloc(mod, len + 1)) == NULL || 188 fmri_nvl2str(nvl, name, len + 1) == 0) { 189 if (name != NULL) 190 topo_mod_free(mod, name, len + 1); 191 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 192 } 193 194 if (topo_mod_nvalloc(mod, &fmristr, NV_UNIQUE_NAME) != 0) { 195 topo_mod_free(mod, name, len + 1); 196 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 197 } 198 if (nvlist_add_string(fmristr, "fmri-string", name) != 0) { 199 topo_mod_free(mod, name, len + 1); 200 nvlist_free(fmristr); 201 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 202 } 203 topo_mod_free(mod, name, len + 1); 204 *out = fmristr; 205 206 return (0); 207 } 208