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 2008 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <errno.h> 34 #include <ctype.h> 35 #include <alloca.h> 36 #include <limits.h> 37 #include <fm/topo_mod.h> 38 #include <sys/param.h> 39 #include <sys/systeminfo.h> 40 #include <sys/fm/protocol.h> 41 #include <sys/stat.h> 42 43 #include <topo_method.h> 44 #include <topo_subr.h> 45 #include <libzfs.h> 46 #include <zfs.h> 47 48 static int zfs_enum(topo_mod_t *, tnode_t *, const char *, topo_instance_t, 49 topo_instance_t, void *, void *); 50 static void zfs_release(topo_mod_t *, tnode_t *); 51 static int zfs_fmri_nvl2str(topo_mod_t *, tnode_t *, topo_version_t, 52 nvlist_t *, nvlist_t **); 53 54 const topo_method_t zfs_methods[] = { 55 { TOPO_METH_NVL2STR, TOPO_METH_NVL2STR_DESC, TOPO_METH_NVL2STR_VERSION, 56 TOPO_STABILITY_INTERNAL, zfs_fmri_nvl2str }, 57 { NULL } 58 }; 59 60 static const topo_modops_t zfs_ops = 61 { zfs_enum, zfs_release }; 62 static const topo_modinfo_t zfs_info = 63 { ZFS, FM_FMRI_SCHEME_ZFS, ZFS_VERSION, &zfs_ops }; 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 85 return (0); 86 } 87 88 void 89 zfs_fini(topo_mod_t *mod) 90 { 91 topo_mod_unregister(mod); 92 } 93 94 95 /*ARGSUSED*/ 96 int 97 zfs_enum(topo_mod_t *mod, tnode_t *pnode, const char *name, topo_instance_t min, 98 topo_instance_t max, void *notused1, void *notused2) 99 { 100 (void) topo_method_register(mod, pnode, zfs_methods); 101 return (0); 102 } 103 104 /*ARGSUSED*/ 105 static void 106 zfs_release(topo_mod_t *mp, tnode_t *node) 107 { 108 topo_method_unregister_all(mp, node); 109 } 110 111 typedef struct cbdata { 112 uint64_t cb_guid; 113 zpool_handle_t *cb_pool; 114 } cbdata_t; 115 116 libzfs_handle_t *g_zfs; 117 118 static int 119 find_pool(zpool_handle_t *zhp, void *data) 120 { 121 cbdata_t *cbp = data; 122 123 if (zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL) == cbp->cb_guid) { 124 cbp->cb_pool = zhp; 125 return (1); 126 } 127 128 zpool_close(zhp); 129 130 return (0); 131 } 132 133 static ssize_t 134 fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen) 135 { 136 uint64_t pool_guid, vdev_guid; 137 cbdata_t cb; 138 ssize_t len; 139 const char *name; 140 char guidbuf[64]; 141 142 (void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid); 143 144 /* 145 * Attempt to convert the pool guid to a name. 146 */ 147 cb.cb_guid = pool_guid; 148 cb.cb_pool = NULL; 149 150 if (zpool_iter(g_zfs, find_pool, &cb) == 1) { 151 name = zpool_get_name(cb.cb_pool); 152 } else { 153 (void) snprintf(guidbuf, sizeof (guidbuf), "%llx", pool_guid); 154 name = guidbuf; 155 } 156 157 if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) == 0) 158 len = snprintf(buf, buflen, "%s://pool=%s/vdev=%llx", 159 FM_FMRI_SCHEME_ZFS, name, vdev_guid); 160 else 161 len = snprintf(buf, buflen, "%s://pool=%s", 162 FM_FMRI_SCHEME_ZFS, name); 163 164 if (cb.cb_pool) 165 zpool_close(cb.cb_pool); 166 167 return (len); 168 } 169 170 /*ARGSUSED*/ 171 static int 172 zfs_fmri_nvl2str(topo_mod_t *mod, tnode_t *node, topo_version_t version, 173 nvlist_t *nvl, nvlist_t **out) 174 { 175 ssize_t len; 176 char *name = NULL; 177 nvlist_t *fmristr; 178 179 if (version > TOPO_METH_NVL2STR_VERSION) 180 return (topo_mod_seterrno(mod, EMOD_VER_NEW)); 181 182 if ((len = fmri_nvl2str(nvl, NULL, 0)) == 0 || 183 (name = topo_mod_alloc(mod, len + 1)) == NULL || 184 fmri_nvl2str(nvl, name, len + 1) == 0) { 185 if (name != NULL) 186 topo_mod_free(mod, name, len + 1); 187 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 188 } 189 190 if (topo_mod_nvalloc(mod, &fmristr, NV_UNIQUE_NAME) != 0) { 191 topo_mod_free(mod, name, len + 1); 192 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 193 } 194 if (nvlist_add_string(fmristr, "fmri-string", name) != 0) { 195 topo_mod_free(mod, name, len + 1); 196 nvlist_free(fmristr); 197 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 198 } 199 topo_mod_free(mod, name, len + 1); 200 *out = fmristr; 201 202 return (0); 203 } 204