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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 22 * Use is subject to license terms. 23 */ 24 25 #ifndef _DEVFSADM_IMPL_H 26 #define _DEVFSADM_IMPL_H 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 #include <dlfcn.h> 35 #include <stdarg.h> 36 #include <fcntl.h> 37 #include <sys/file.h> 38 #include <locale.h> 39 #include <libintl.h> 40 #include <ctype.h> 41 #include <signal.h> 42 #include <deflt.h> 43 #include <ftw.h> 44 #include <sys/instance.h> 45 #include <sys/types.h> 46 #include <dirent.h> 47 #include <pwd.h> 48 #include <grp.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <sys/mkdev.h> 52 #include <sys/stat.h> 53 #include <fcntl.h> 54 #include <errno.h> 55 #include <unistd.h> 56 #include <sys/stat.h> 57 #include <sys/int_types.h> 58 #include <limits.h> 59 #include <strings.h> 60 #include <devfsadm.h> 61 #include <libdevinfo.h> 62 #include <sys/devinfo_impl.h> 63 #include <sys/modctl.h> 64 #include <libgen.h> 65 #include <sys/hwconf.h> 66 #include <sys/sunddi.h> 67 #include <door.h> 68 #include <syslog.h> 69 #include <libsysevent.h> 70 #include <thread.h> 71 #include <message.h> 72 #include <sys/cladm.h> 73 #include <librcm.h> 74 #include <sys/sysevent/dev.h> 75 #include <libzonecfg.h> 76 #include <device_info.h> 77 #include <sys/fs/sdev_node.h> 78 #include <sys/syscall.h> 79 #include <rpcsvc/ypclnt.h> 80 #include <sys/sysevent/eventdefs.h> 81 82 #undef DEBUG 83 #ifndef DEBUG 84 #define NDEBUG 1 85 #else 86 #undef NDEBUG 87 #endif 88 89 #include <assert.h> 90 91 92 #define DEV_LOCK_FILE ".devfsadm_dev.lock" 93 #define DAEMON_LOCK_FILE ".devfsadm_daemon.lock" 94 95 #define DEV "/dev" 96 #define ETC "/etc" 97 #define ETCDEV "/etc/dev" 98 #define DEV_LEN 4 99 #define DEVICES "/devices" 100 #define DEVICES_LEN 8 101 #define MODULE_DIRS "/usr/lib/devfsadm/linkmod" 102 #define ALIASFILE "/etc/driver_aliases" 103 #define NAME_TO_MAJOR "/etc/name_to_major" 104 #define RECONFIG_BOOT "_INIT_RECONFIG" 105 #define PID_STR_LEN 10 106 #define EXTRA_PRIVS "/etc/security/extra_privs" 107 #define DEV_POLICY "/etc/security/device_policy" 108 #define LDEV_FILE "/etc/logindevperm" 109 110 #define DEVFSADM_DEFAULT_FILE "/etc/default/devfsadm" 111 112 #define MINOR_FINI_TIMEOUT_DEFAULT 3 113 114 #define SYNCH_DOOR_PERMS (S_IRUSR | S_IWUSR) 115 116 #define DRVCONFIG "drvconfig" 117 #define DEVFSADM "devfsadm" 118 #define DEVFSADMD "devfsadmd" 119 #define DEVLINKS "devlinks" 120 #define TAPES "tapes" 121 #define AUDLINKS "audlinks" 122 #define PORTS "ports" 123 #define DISKS "disks" 124 125 #define MAX_IDLE_DELAY 5 126 #define MAX_DELAY 30 127 #define NAME 0x01 128 #define ADDR 0x03 129 #define MINOR 0x04 130 #define COUNTER 0x05 131 #define CONSTANT 0x06 132 #define TYPE 0x07 133 #define TYPE_S "type" 134 #define ADDR_S "addr" 135 #define ADDR_S_LEN 4 136 #define MINOR_S "minor" 137 #define MINOR_S_LEN 5 138 #define NAME_S "name" 139 #define TAB '\t' 140 #define NEWLINE '\n' 141 #define MAX_DEVLINK_LINE 4028 142 #define INTEGER 0 143 #define LETTER 1 144 #define MAX_PERM_LINE 256 145 #define MAX_LDEV_LINE 256 146 #define LDEV_DELIMS " \t\n" 147 #define LDEV_DRVLIST_DELIMS "=" 148 #define LDEV_DRV_DELIMS ", \t\n" 149 #define LDEV_DEV_DELIM ":" 150 #define LDEV_DRVLIST_NAME "driver" 151 #define NFP_HASH_SZ 256 152 153 #define TYPE_LINK 0x00 154 #define TYPE_DEVICES 0x01 155 156 #define CREATE_LINK 0x01 157 #define READ_LINK 0x02 158 #define CREATE_NODE 0x01 159 #define READ_NODE 0x02 160 161 #define CACHE_STATE 0x0 162 #define SYNC_STATE 0x1 163 164 #define MODULE_ACTIVE 0x01 165 166 #define MAX_SLEEP 120 167 168 #define DEVLINKTAB_FILE "/etc/devlink.tab" 169 170 #define MODULE_SUFFIX ".so" 171 #define MINOR_INIT "minor_init" 172 #define MINOR_FINI "minor_fini" 173 #define _DEVFSADM_CREATE_REG "_devfsadm_create_reg" 174 #define _DEVFSADM_REMOVE_REG "_devfsadm_remove_reg" 175 176 #define NUM_EV_STR 4 177 #define EV_TYPE 0 178 #define EV_CLASS 1 179 #define EV_PATH_NAME 2 180 #define EV_MINOR_NAME 3 181 182 /* add new debug level and meanings here */ 183 #define DEVLINK_MID "devfsadm:devlink" 184 #define MODLOAD_MID "devfsadm:modload" 185 #define INITFINI_MID "devfsadm:initfini" 186 #define EVENT_MID "devfsadm:event" 187 #define REMOVE_MID "devfsadm:remove" 188 #define LOCK_MID "devfsadm:lock" 189 #define PATH2INST_MID "devfsadm:path2inst" 190 #define CACHE_MID "devfsadm:cache" 191 #define BUILDCACHE_MID "devfsadm:buildcache" 192 #define RECURSEDEV_MID "devfsadm:recursedev" 193 #define INSTSYNC_MID "devfsadm:instsync" 194 #define FILES_MID "devfsadm:files" 195 #define ENUM_MID "devfsadm:enum" 196 #define LINKCACHE_MID "devfsadm:linkcache" 197 #define ADDREMCACHE_MID "devfsadm:addremcache" 198 #define MALLOC_MID "devfsadm:malloc" 199 #define READDIR_MID "devfsadm:readdir" 200 #define READDIR_ALL_MID "devfsadm:readdir_all" 201 #define DEVNAME_MID "devfsadm:devname" 202 #define ALL_MID "all" 203 204 #define DEVFSADM_DEBUG_ON (verbose == NULL) ? FALSE : TRUE 205 206 typedef struct recurse_dev { 207 void (*fcn)(char *, void *); 208 void *data; 209 } recurse_dev_t; 210 211 typedef struct link { 212 char *devlink; /* without ".../dev/" prefix */ 213 char *contents; /* without "../devices" prefix */ 214 struct link *next; 215 } link_t; 216 217 typedef struct linkhead { 218 regex_t dir_re_compiled; 219 char *dir_re; 220 link_t *link; 221 link_t *nextlink; 222 struct linkhead *nexthead; 223 } linkhead_t; 224 225 typedef struct link_list { 226 int type; 227 char *constant; 228 int arg; 229 struct link_list *next; 230 } link_list_t; 231 232 typedef struct selector_list { 233 int key; 234 char *val; 235 int arg; 236 struct selector_list *next; 237 } selector_list_t; 238 239 typedef struct devlinktab_list { 240 int line_number; 241 char *selector_pattern; 242 char *p_link_pattern; 243 char *s_link_pattern; 244 selector_list_t *selector; 245 link_list_t *p_link; 246 link_list_t *s_link; 247 struct devlinktab_list *next; 248 } devlinktab_list_t; 249 250 typedef struct module { 251 char *name; 252 void *dlhandle; 253 int (*minor_init)(); 254 int (*minor_fini)(); 255 int flags; 256 struct module *next; 257 } module_t; 258 259 typedef struct create_list { 260 devfsadm_create_t *create; 261 module_t *modptr; 262 regex_t node_type_comp; 263 regex_t drv_name_comp; 264 struct create_list *next; 265 } create_list_t; 266 267 struct minor { 268 di_node_t node; 269 di_minor_t minor; 270 struct minor *next; 271 }; 272 273 struct mlist { 274 struct minor *head; 275 struct minor *tail; 276 }; 277 278 typedef struct remove_list { 279 devfsadm_remove_V1_t *remove; 280 module_t *modptr; 281 struct remove_list *next; 282 } remove_list_t; 283 284 typedef struct item { 285 char *i_key; 286 struct item *i_next; 287 } item_t; 288 289 typedef struct cleanup_data { 290 int flags; 291 char *phypath; 292 remove_list_t *rm; 293 } cleanup_data_t; 294 295 typedef struct n2m { 296 major_t major; 297 char *driver; 298 struct n2m *next; 299 } n2m_t; 300 301 /* structures for devfsadm_enumerate() */ 302 typedef struct numeral { 303 char *id; 304 char *full_path; 305 int rule_index; 306 char *cmp_str; 307 struct numeral *next; 308 } numeral_t; 309 310 typedef struct numeral_set { 311 int re_count; 312 char **re; 313 numeral_t *headnumeral; 314 struct numeral_set *next; 315 } numeral_set_t; 316 317 typedef struct temp { 318 int integer; 319 struct temp *next; 320 } temp_t; 321 322 typedef struct driver_alias { 323 char *driver_name; 324 char *alias_name; 325 struct driver_alias *next; 326 } driver_alias_t; 327 328 struct driver_list { 329 char driver_name[MAXNAMELEN]; 330 struct driver_list *next; 331 }; 332 333 struct login_dev { 334 char *ldev_console; 335 int ldev_perms; 336 char *ldev_device; 337 regex_t ldev_device_regex; 338 struct driver_list *ldev_driver_list; 339 struct login_dev *ldev_next; 340 }; 341 342 #define MAX_DEV_NAME_COUNT 100 343 struct devlink_cb_arg { 344 char *dev_names[MAX_DEV_NAME_COUNT]; 345 char *link_contents[MAX_DEV_NAME_COUNT]; 346 int count; 347 int rv; 348 }; 349 350 struct dca_impl { 351 char *dci_root; 352 char *dci_minor; 353 char *dci_driver; 354 void *dci_arg; 355 int dci_error; 356 int dci_flags; 357 }; 358 359 /* RCM related */ 360 struct rcm_eventq { 361 nvlist_t *nvl; 362 struct rcm_eventq *next; 363 }; 364 365 static int devfsadm_enumerate_int_start(char *devfs_path, 366 int index, char **buf, devfsadm_enumerate_t rules[], 367 int nrules, char *start); 368 static void set_root_devices_dev_dir(char *dir); 369 static void pre_and_post_cleanup(int flags); 370 static void hot_cleanup(char *, char *, char *, char *, int); 371 static void devfsadm_exit(int status); 372 static void rm_link_from_cache(char *devlink); 373 static void rm_all_links_from_cache(); 374 static void add_link_to_cache(char *devlink, char *physpath); 375 static linkhead_t *get_cached_links(char *dir_re); 376 static void build_devlink_list(char *check_link, void *data); 377 static void instance_flush_thread(void); 378 static int s_rmdir(char *path); 379 static void rm_parent_dir_if_empty(char *path); 380 static void free_link_list(link_list_t *head); 381 static void free_selector_list(selector_list_t *head); 382 void devfsadm_err_print(char *message, ...); 383 void defvsadm_print(int level, char *message, ...); 384 static int call_minor_init(module_t *module); 385 static void load_module(char *module, char *cdir); 386 static void invalidate_enumerate_cache(void); 387 static pid_t enter_dev_lock(void); 388 static void exit_dev_lock(void); 389 static pid_t enter_daemon_lock(void); 390 static void exit_daemon_lock(void); 391 static int process_devlink_compat(di_minor_t minor, di_node_t node); 392 static int alias(char *, char *); 393 static int devfsadm_copy(void); 394 static void flush_path_to_inst(void); 395 static void detachfromtty(void); 396 static void minor_process(di_node_t node, di_minor_t minor, 397 struct mlist *dep); 398 static void read_minor_perm_file(void); 399 static void read_driver_aliases_file(void); 400 static void load_modules(void); 401 static void unload_modules(void); 402 static void *s_malloc(const size_t size); 403 static void *s_zalloc(const size_t size); 404 static void devfs_instance_mod(void); 405 static void add_minor_pathname(char *, char *, char *); 406 static int check_minor_type(di_node_t node, di_minor_t minor, void *arg); 407 static void cache_deferred_minor(struct mlist *dep, di_node_t node, 408 di_minor_t minor); 409 static int compare_field(char *full_name, char *field_item, int field); 410 static int component_cat(char *link, char *name, int field); 411 static void recurse_dev_re(char *current_dir, char *path_re, recurse_dev_t *rd); 412 static void matching_dev(char *devpath, void *data); 413 static int resolve_link(char *devpath, char **content_p, int *type_p, 414 char **devfs_path, int dangle); 415 static int clean_ok(devfsadm_remove_V1_t *remove); 416 static int translate_major(dev_t old_dev, dev_t *new_dev); 417 static int get_major_no(char *driver, major_t *major); 418 static int load_n2m_table(char *filename); 419 static int get_stat_info(char *, struct stat *); 420 static char *new_id(numeral_t *, int, char *); 421 static int find_enum_id(devfsadm_enumerate_t rules[], int nrules, 422 char *devfs_path, int index, char *min, int type, char **buf, int multiple); 423 static void daemon_update(void); 424 static void usage(void); 425 static int getnexttoken(char *next, char **nextp, char **tokenpp, char *tchar); 426 static int class_ok(char *class); 427 static int create_link_common(char *devlink, char *contents, int *exists); 428 static char *dequote(char *src); 429 static void parse_args(int argc, char *argv[]); 430 static void process_devinfo_tree(void); 431 static void minor_fini_thread(void *arg); 432 static void *s_realloc(void *ptr, const size_t size); 433 static void read_devlinktab_file(void); 434 static selector_list_t *create_selector_list(char *selector); 435 static int parse_selector(char **selector, char **key, char **val); 436 int devfsadm_noupdate(void); 437 const char *devfsadm_root_path(void); 438 static link_list_t *create_link_list(char *link); 439 static void s_unlink(const char *file); 440 static void s_closedir(DIR *dirp); 441 static void s_mkdirp(const char *path, const mode_t mode); 442 static int is_minor_node(char *contents, char **mn_root); 443 static int construct_devlink(char *link, link_list_t *link_build, 444 char *contents, di_minor_t minor, 445 di_node_t node, char *pattern); 446 static int split_devlinktab_entry(char *entry, char **selector, char **p_link, 447 char **s_link); 448 static int devlink_matches(devlinktab_list_t *entry, di_minor_t minor, 449 di_node_t node); 450 static int build_links(devlinktab_list_t *entry, di_minor_t minor, 451 di_node_t node); 452 static numeral_set_t *get_enum_cache(devfsadm_enumerate_t rules[], 453 int nrules); 454 static void enumerate_recurse(char *current_dir, char *path_left, 455 numeral_set_t *setp, devfsadm_enumerate_t rules[], int index); 456 457 static int match_path_component(char *file_re, char *file, char **id, 458 int subexp); 459 static void create_cached_numeral(char *path, numeral_set_t *setp, 460 char *numeral_id, devfsadm_enumerate_t rules[], int index); 461 static int devfsadm_copy_file(const char *file, const struct stat *stat, 462 int flags, struct FTW *ftw); 463 static void getattr(char *devname, char *aminor, int spectype, dev_t dev, 464 mode_t *mode, uid_t *uid, gid_t *gid); 465 static int minor_matches_rule(di_node_t node, di_minor_t minor, 466 create_list_t *create); 467 static void add_verbose_id(char *mid); 468 static char *get_component(char *str, const char *comp_num); 469 static char *alloc_cmp_str(const char *devfs_path, devfsadm_enumerate_t *dep); 470 static int lookup_enum_cache(numeral_set_t *set, char *cmp_str, 471 devfsadm_enumerate_t rules[], int index, numeral_t **matchnpp); 472 static void sync_handler(void *cookie, char *ap, size_t asize, 473 door_desc_t *dp, uint_t ndesc); 474 static int zone_pathcheck(char *checkpath); 475 static void process_deferred_links(struct dca_impl *dcip, int flag); 476 static void event_handler(sysevent_t *ev); 477 static int rcm_init(void); 478 static int notify_rcm(di_node_t node, char *minor_name); 479 static void dca_impl_init(char *root, char *minor, struct dca_impl *dcip); 480 static void lock_dev(void); 481 static void unlock_dev(int flag); 482 static int devlink_cb(di_devlink_t dl, void *arg); 483 static void free_dev_names(struct devlink_cb_arg *x); 484 485 int load_devpolicy(void); 486 static void load_dev_acl(void); 487 static void load_minor_perm_file(void); 488 489 static int (*librcm_alloc_handle)(char *, uint_t, void *, rcm_handle_t **); 490 static void (*librcm_free_handle)(rcm_handle_t *); 491 static int (*librcm_notify_event)(rcm_handle_t *, char *, uint_t, nvlist_t *, 492 rcm_info_t *); 493 static nvlist_t *build_event_attributes(char *, char *, char *, 494 di_node_t, char *, int); 495 static void log_event(char *, char *, nvlist_t *); 496 static void build_and_log_event(char *, char *, char *, di_node_t); 497 498 static void read_logindevperm_file(void); 499 static void set_logindev_perms(char *devlink); 500 501 static void reset_node_permissions(di_node_t, di_minor_t); 502 503 /* 504 * devname related 505 */ 506 static void devname_lookup_handler(void *, char *, size_t, 507 door_desc_t *, uint_t); /* /dev name lookup server */ 508 static int devname_kcall(int, void *); /* syscall into the devname fs */ 509 static void nfphash_create(void); 510 static int nfphash_fcn(char *key); 511 static item_t *nfphash_lookup(char *key); 512 static void nfphash_insert(char *key); 513 static void nfphash_destroy(void); 514 515 /* convenient short hands */ 516 #define vprint devfsadm_print 517 #define err_print devfsadm_errprint 518 #ifndef TRUE 519 #define TRUE 1 520 #endif 521 #ifndef FALSE 522 #define FALSE 0 523 #endif 524 525 #ifdef __cplusplus 526 } 527 #endif 528 529 #endif /* _DEVFSADM_IMPL_H */ 530