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_release(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_release }; 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 g_zfs = libzfs_init(); 85 86 return (0); 87 } 88 89 void 90 zfs_fini(topo_mod_t *mod) 91 { 92 if (g_zfs) { 93 libzfs_fini(g_zfs); 94 g_zfs = NULL; 95 } 96 topo_mod_unregister(mod); 97 } 98 99 100 /*ARGSUSED*/ 101 int 102 zfs_enum(topo_mod_t *mod, tnode_t *pnode, const char *name, topo_instance_t min, 103 topo_instance_t max, void *notused1, void *notused2) 104 { 105 (void) topo_method_register(mod, pnode, zfs_methods); 106 return (0); 107 } 108 109 /*ARGSUSED*/ 110 static void 111 zfs_release(topo_mod_t *mp, tnode_t *node) 112 { 113 topo_method_unregister_all(mp, node); 114 } 115 116 typedef struct cbdata { 117 uint64_t cb_guid; 118 zpool_handle_t *cb_pool; 119 } cbdata_t; 120 121 static int 122 find_pool(zpool_handle_t *zhp, void *data) 123 { 124 cbdata_t *cbp = data; 125 126 if (zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL) == cbp->cb_guid) { 127 cbp->cb_pool = zhp; 128 return (1); 129 } 130 131 zpool_close(zhp); 132 133 return (0); 134 } 135 136 static ssize_t 137 fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen) 138 { 139 uint64_t pool_guid, vdev_guid; 140 cbdata_t cb; 141 ssize_t len; 142 const char *name; 143 char guidbuf[64]; 144 145 (void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid); 146 147 /* 148 * Attempt to convert the pool guid to a name. 149 */ 150 cb.cb_guid = pool_guid; 151 cb.cb_pool = NULL; 152 153 if (g_zfs != NULL && zpool_iter(g_zfs, find_pool, &cb) == 1) { 154 name = zpool_get_name(cb.cb_pool); 155 } else { 156 (void) snprintf(guidbuf, sizeof (guidbuf), "%llx", pool_guid); 157 name = guidbuf; 158 } 159 160 if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) == 0) 161 len = snprintf(buf, buflen, "%s://pool=%s/vdev=%llx", 162 FM_FMRI_SCHEME_ZFS, name, vdev_guid); 163 else 164 len = snprintf(buf, buflen, "%s://pool=%s", 165 FM_FMRI_SCHEME_ZFS, name); 166 167 if (cb.cb_pool) 168 zpool_close(cb.cb_pool); 169 170 return (len); 171 } 172 173 /*ARGSUSED*/ 174 static int 175 zfs_fmri_nvl2str(topo_mod_t *mod, tnode_t *node, topo_version_t version, 176 nvlist_t *nvl, nvlist_t **out) 177 { 178 ssize_t len; 179 char *name = NULL; 180 nvlist_t *fmristr; 181 182 if (version > TOPO_METH_NVL2STR_VERSION) 183 return (topo_mod_seterrno(mod, EMOD_VER_NEW)); 184 185 if ((len = fmri_nvl2str(nvl, NULL, 0)) == 0 || 186 (name = topo_mod_alloc(mod, len + 1)) == NULL || 187 fmri_nvl2str(nvl, name, len + 1) == 0) { 188 if (name != NULL) 189 topo_mod_free(mod, name, len + 1); 190 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 191 } 192 193 if (topo_mod_nvalloc(mod, &fmristr, NV_UNIQUE_NAME) != 0) { 194 topo_mod_free(mod, name, len + 1); 195 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 196 } 197 if (nvlist_add_string(fmristr, "fmri-string", name) != 0) { 198 topo_mod_free(mod, name, len + 1); 199 nvlist_free(fmristr); 200 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 201 } 202 topo_mod_free(mod, name, len + 1); 203 *out = fmristr; 204 205 return (0); 206 } 207