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 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <limits.h> 30 #include <strings.h> 31 #include <unistd.h> 32 #include <libnvpair.h> 33 #include <fm/topo_mod.h> 34 #include <sys/fm/protocol.h> 35 36 #include <fcntl.h> 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <sys/objfs.h> 40 #include <sys/modctl.h> 41 #include <libelf.h> 42 #include <gelf.h> 43 44 #include <topo_method.h> 45 #include <topo_subr.h> 46 #include <mod.h> 47 48 static int mod_enum(topo_mod_t *, tnode_t *, const char *, topo_instance_t, 49 topo_instance_t, void *, void *); 50 static void mod_release(topo_mod_t *, tnode_t *); 51 static int mod_fmri_create_meth(topo_mod_t *, tnode_t *, topo_version_t, 52 nvlist_t *, nvlist_t **); 53 static int mod_fmri_nvl2str(topo_mod_t *, tnode_t *, topo_version_t, 54 nvlist_t *, nvlist_t **); 55 56 static const topo_method_t mod_methods[] = { 57 { TOPO_METH_FMRI, TOPO_METH_FMRI_DESC, TOPO_METH_FMRI_VERSION, 58 TOPO_STABILITY_INTERNAL, mod_fmri_create_meth }, 59 { TOPO_METH_NVL2STR, TOPO_METH_NVL2STR_DESC, TOPO_METH_NVL2STR_VERSION, 60 TOPO_STABILITY_INTERNAL, mod_fmri_nvl2str }, 61 { NULL } 62 }; 63 64 static const topo_modops_t mod_modops = 65 { mod_enum, mod_release }; 66 static const topo_modinfo_t mod_info = 67 { "mod", FM_FMRI_SCHEME_MOD, MOD_VERSION, &mod_modops }; 68 69 int 70 mod_init(topo_mod_t *mod, topo_version_t version) 71 { 72 if (getenv("TOPOMODDEBUG")) 73 topo_mod_setdebug(mod); 74 topo_mod_dprintf(mod, "initializing mod builtin\n"); 75 76 if (version != MOD_VERSION) 77 return (topo_mod_seterrno(mod, EMOD_VER_NEW)); 78 79 if (topo_mod_register(mod, &mod_info, TOPO_VERSION) != 0) { 80 topo_mod_dprintf(mod, "failed to register mod_info: " 81 "%s\n", topo_mod_errmsg(mod)); 82 return (-1); /* mod errno already set */ 83 } 84 85 return (0); 86 } 87 88 void 89 mod_fini(topo_mod_t *mod) 90 { 91 topo_mod_unregister(mod); 92 } 93 94 /*ARGSUSED*/ 95 static int 96 mod_enum(topo_mod_t *mod, tnode_t *pnode, const char *name, 97 topo_instance_t min, topo_instance_t max, void *notused1, void *notused2) 98 { 99 (void) topo_method_register(mod, pnode, mod_methods); 100 return (0); 101 } 102 103 static void 104 mod_release(topo_mod_t *mod, tnode_t *node) 105 { 106 topo_method_unregister_all(mod, node); 107 } 108 109 static int 110 mod_binary_path_get(topo_mod_t *mp, const char *objpath) 111 { 112 Elf *elf = NULL; 113 Elf_Scn *scn = NULL; 114 GElf_Ehdr ehdr; 115 GElf_Shdr shdr; 116 int fd; 117 118 if ((fd = open(objpath, O_RDONLY)) < 0) { 119 topo_mod_dprintf(mp, "unable to open %s\n", objpath); 120 return (-1); 121 } 122 123 if (elf_version(EV_CURRENT) == EV_NONE) { 124 topo_mod_dprintf(mp, "Elf version out of whack\n"); 125 goto mbpg_bail; 126 } 127 if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) { 128 topo_mod_dprintf(mp, "elf_begin failed\n"); 129 goto mbpg_bail; 130 } 131 if ((gelf_getehdr(elf, &ehdr)) == NULL) { 132 topo_mod_dprintf(mp, "gelf_getehdr failed\n"); 133 goto mbpg_bail; 134 } 135 scn = elf_getscn(elf, 0); /* "seek" to start of sections */ 136 while ((scn = elf_nextscn(elf, scn)) != NULL) { 137 const char *sh_name; 138 if (gelf_getshdr(scn, &shdr) == NULL) { 139 topo_mod_dprintf(mp, "gelf_getshdr failed\n"); 140 goto mbpg_bail; 141 } 142 if (shdr.sh_type != SHT_PROGBITS) 143 continue; 144 sh_name = elf_strptr(elf, 145 ehdr.e_shstrndx, (size_t)shdr.sh_name); 146 if (strcmp(sh_name, ".filename") != 0) 147 continue; 148 if (elf_getdata(scn, NULL) == NULL) { 149 topo_mod_dprintf(mp, "no filename data"); 150 break; 151 } 152 break; 153 } 154 elf_end(elf); 155 (void) close(fd); 156 return (0); 157 158 mbpg_bail: 159 if (elf != NULL) 160 elf_end(elf); 161 if (fd >= 0) 162 (void) close(fd); 163 (void) topo_mod_seterrno(mp, EMOD_METHOD_INVAL); 164 return (-1); 165 } 166 167 static int 168 mod_nvl_data(topo_mod_t *mp, nvlist_t *out, const char *path) 169 { 170 struct modinfo mi; 171 struct stat64 s; 172 int id, e; 173 174 if (stat64(path, &s) < 0) { 175 topo_mod_dprintf(mp, 176 "No system object file for driver %s", path); 177 return (topo_mod_seterrno(mp, EMOD_METHOD_INVAL)); 178 } 179 180 id = OBJFS_MODID(s.st_ino); 181 mi.mi_id = mi.mi_nextid = id; 182 mi.mi_info = MI_INFO_ONE | MI_INFO_NOBASE; 183 if (modctl(MODINFO, id, &mi) < 0) { 184 return (topo_mod_seterrno(mp, EMOD_METHOD_INVAL)); 185 } 186 mi.mi_name[MODMAXNAMELEN - 1] = '\0'; 187 mi.mi_msinfo[0].msi_linkinfo[MODMAXNAMELEN - 1] = '\0'; 188 e = nvlist_add_string(out, FM_FMRI_SCHEME, FM_FMRI_SCHEME_MOD); 189 e |= nvlist_add_uint8(out, FM_VERSION, FM_MOD_SCHEME_VERSION); 190 e |= nvlist_add_int32(out, FM_FMRI_MOD_ID, id); 191 e |= nvlist_add_string(out, FM_FMRI_MOD_NAME, mi.mi_name); 192 e |= nvlist_add_string(out, 193 FM_FMRI_MOD_DESC, mi.mi_msinfo[0].msi_linkinfo); 194 if (e != 0) 195 return (topo_mod_seterrno(mp, EMOD_FMRI_NVL)); 196 197 return (0); 198 } 199 200 static nvlist_t * 201 mod_fmri_create(topo_mod_t *mp, const char *driver) 202 { 203 nvlist_t *out = NULL; 204 char objpath[PATH_MAX]; 205 206 if (topo_mod_nvalloc(mp, &out, NV_UNIQUE_NAME) != 0) { 207 (void) topo_mod_seterrno(mp, EMOD_FMRI_NVL); 208 goto mfc_bail; 209 } 210 211 (void) snprintf(objpath, PATH_MAX, "%s/%s/object", OBJFS_ROOT, driver); 212 213 /* 214 * Validate the module object ELF header if possible 215 */ 216 if (mod_binary_path_get(mp, objpath) < 0) 217 goto mfc_bail; 218 219 if (mod_nvl_data(mp, out, objpath) < 0) { 220 topo_mod_dprintf(mp, "failed to get modinfo for %s", driver); 221 goto mfc_bail; 222 } 223 224 return (out); 225 226 mfc_bail: 227 nvlist_free(out); 228 return (NULL); 229 } 230 231 /*ARGSUSED*/ 232 static int 233 mod_fmri_create_meth(topo_mod_t *mp, tnode_t *node, topo_version_t version, 234 nvlist_t *in, nvlist_t **out) 235 { 236 nvlist_t *args; 237 nvlist_t *modnvl; 238 char *driver; 239 240 if (version > TOPO_METH_FMRI_VERSION) 241 return (topo_mod_seterrno(mp, EMOD_VER_NEW)); 242 243 if (nvlist_lookup_nvlist(in, TOPO_METH_FMRI_ARG_NVL, &args) != 0 || 244 nvlist_lookup_string(args, "DRIVER", &driver) != 0) { 245 topo_mod_dprintf(mp, "no DRIVER string in method argument\n"); 246 return (topo_mod_seterrno(mp, EMOD_METHOD_INVAL)); 247 } 248 249 modnvl = mod_fmri_create(mp, driver); 250 if (modnvl == NULL) { 251 *out = NULL; 252 topo_mod_dprintf(mp, "failed to create contained mod FMRI\n"); 253 return (-1); 254 } 255 *out = modnvl; 256 return (0); 257 } 258 259 #define MAXINTSTR 11 260 261 static ssize_t 262 fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen) 263 { 264 nvlist_t *anvl = NULL; 265 uint8_t version; 266 ssize_t size = 0; 267 int32_t modid; 268 char *achas = NULL; 269 char *aprod = NULL; 270 char *asrvr = NULL; 271 char *modname = NULL; 272 char numbuf[MAXINTSTR]; 273 int more_auth = 0; 274 int err; 275 276 if (nvlist_lookup_uint8(nvl, FM_VERSION, &version) != 0 || 277 version > FM_MOD_SCHEME_VERSION) 278 return (-1); 279 280 /* Get authority, if present */ 281 err = nvlist_lookup_nvlist(nvl, FM_FMRI_AUTHORITY, &anvl); 282 if (err != 0 && err != ENOENT) 283 return (-1); 284 285 /* 286 * For brevity, we only include the module name and id 287 * present in the FMRI in our output string. The FMRI 288 * also has data on the package containing the module. 289 */ 290 291 /* There must be a module name */ 292 err = nvlist_lookup_string(nvl, FM_FMRI_MOD_NAME, &modname); 293 if (err != 0 || modname == NULL) 294 return (-1); 295 296 /* There must be a module id */ 297 err = nvlist_lookup_int32(nvl, FM_FMRI_MOD_ID, &modid); 298 if (err != 0) 299 return (-1); 300 301 if (anvl != NULL) { 302 (void) nvlist_lookup_string(anvl, 303 FM_FMRI_AUTH_PRODUCT, &aprod); 304 (void) nvlist_lookup_string(anvl, 305 FM_FMRI_AUTH_CHASSIS, &achas); 306 (void) nvlist_lookup_string(anvl, 307 FM_FMRI_AUTH_SERVER, &asrvr); 308 if (aprod != NULL) 309 more_auth++; 310 if (achas != NULL) 311 more_auth++; 312 if (asrvr != NULL) 313 more_auth++; 314 } 315 316 /* mod:// */ 317 topo_fmristr_build(&size, buf, buflen, FM_FMRI_SCHEME_MOD, NULL, "://"); 318 319 /* authority, if any */ 320 if (aprod != NULL) 321 topo_fmristr_build(&size, buf, buflen, aprod, 322 ":" FM_FMRI_AUTH_PRODUCT "=", NULL); 323 if (achas != NULL) 324 topo_fmristr_build(&size, buf, buflen, achas, 325 ":" FM_FMRI_AUTH_CHASSIS "=", NULL); 326 if (asrvr != NULL) 327 topo_fmristr_build(&size, buf, buflen, asrvr, 328 ":" FM_FMRI_AUTH_SERVER "=", NULL); 329 330 /* module parts */ 331 topo_fmristr_build(&size, buf, buflen, modname, 332 "/" FM_FMRI_MOD_NAME "=", "/"); 333 334 (void) snprintf(numbuf, MAXINTSTR, "%d", modid); 335 topo_fmristr_build(&size, buf, buflen, numbuf, FM_FMRI_MOD_ID "=", 336 NULL); 337 338 return (size); 339 } 340 341 /*ARGSUSED*/ 342 static int 343 mod_fmri_nvl2str(topo_mod_t *mod, tnode_t *node, topo_version_t version, 344 nvlist_t *nvl, nvlist_t **out) 345 { 346 ssize_t len; 347 char *name = NULL; 348 nvlist_t *fmristr; 349 350 if (version > TOPO_METH_NVL2STR_VERSION) 351 return (topo_mod_seterrno(mod, EMOD_VER_NEW)); 352 353 if ((len = fmri_nvl2str(nvl, NULL, 0)) == 0 || 354 (name = topo_mod_alloc(mod, len + 1)) == NULL || 355 fmri_nvl2str(nvl, name, len + 1) == 0) { 356 if (name != NULL) 357 topo_mod_free(mod, name, len + 1); 358 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 359 } 360 361 if (topo_mod_nvalloc(mod, &fmristr, NV_UNIQUE_NAME) != 0) 362 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 363 if (nvlist_add_string(fmristr, "fmri-string", name) != 0) { 364 topo_mod_free(mod, name, len + 1); 365 nvlist_free(fmristr); 366 return (topo_mod_seterrno(mod, EMOD_FMRI_NVL)); 367 } 368 topo_mod_free(mod, name, len + 1); 369 *out = fmristr; 370 371 return (0); 372 } 373