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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <unistd.h> 29 #include <errno.h> 30 #include <libintl.h> 31 #include <string.h> 32 #include <fcntl.h> 33 #include <sys/buf.h> 34 #include <sys/stat.h> 35 #include <sys/wait.h> 36 #include <limits.h> 37 #include <malloc.h> 38 #include <locale.h> 39 #include <ftw.h> 40 #include <sys/types.h> 41 #include <sys/mkdev.h> 42 #include <sys/modctl.h> 43 #include <sys/instance.h> 44 #include <libdevinfo.h> 45 #include <zone.h> 46 47 #include "addrem.h" 48 #include "errmsg.h" 49 50 #define FT_DEPTH 15 /* device tree depth for nftw() */ 51 52 static void usage(void); 53 static void cleanup_devfs_attributes(char *, char *); 54 55 int 56 main(int argc, char *argv[]) 57 { 58 int opt; 59 char *basedir = NULL, *driver_name = NULL; 60 int server = 0, mod_unloaded = 0; 61 int modid, found; 62 char maj_num[MAX_STR_MAJOR + 1]; 63 int cleanup = 0; 64 int err; 65 int n_flag = 0; 66 67 (void) setlocale(LC_ALL, ""); 68 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */ 69 #define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */ 70 #endif 71 (void) textdomain(TEXT_DOMAIN); 72 73 /* must be run by root */ 74 75 if (getuid() != 0) { 76 (void) fprintf(stderr, gettext(ERR_NOT_ROOT)); 77 exit(1); 78 } 79 80 while ((opt = getopt(argc, argv, "b:Cn")) != -1) { 81 switch (opt) { 82 case 'b' : 83 server = 1; 84 basedir = calloc(strlen(optarg) + 1, 1); 85 if (basedir == NULL) { 86 (void) fprintf(stderr, gettext(ERR_NO_MEM)); 87 exit(1); 88 } 89 (void) strcat(basedir, optarg); 90 break; 91 case 'C': 92 cleanup = 1; 93 break; 94 case 'n': 95 n_flag = 1; 96 break; 97 case '?' : 98 usage(); 99 exit(1); 100 } 101 } 102 103 if (argv[optind] != NULL) { 104 driver_name = calloc(strlen(argv[optind]) + 1, 1); 105 if (driver_name == NULL) { 106 (void) fprintf(stderr, gettext(ERR_NO_MEM)); 107 exit(1); 108 109 } 110 (void) strcat(driver_name, argv[optind]); 111 /* 112 * check for extra args 113 */ 114 if ((optind + 1) != argc) { 115 usage(); 116 exit(1); 117 } 118 119 } else { 120 usage(); 121 exit(1); 122 } 123 124 if (getzoneid() != GLOBAL_ZONEID) { 125 (void) fprintf(stderr, gettext(ERR_NOT_GLOBAL_ZONE)); 126 exit(1); 127 } 128 129 /* set up add_drv filenames */ 130 if ((build_filenames(basedir)) == ERROR) { 131 exit(1); 132 } 133 134 /* must be only running version of add_drv/mod_drv/rem_drv */ 135 enter_lock(); 136 137 if ((check_perms_aliases(1, 1)) == ERROR) 138 err_exit(); 139 140 if ((check_name_to_major(R_OK | W_OK)) == ERROR) 141 err_exit(); 142 143 /* look up the major number of the driver being removed. */ 144 if ((found = get_major_no(driver_name, name_to_major)) == ERROR) { 145 (void) fprintf(stderr, gettext(ERR_MAX_MAJOR), name_to_major); 146 err_exit(); 147 } 148 if (found == UNIQUE) { 149 (void) fprintf(stderr, gettext(ERR_NOT_INSTALLED), 150 driver_name); 151 err_exit(); 152 } 153 154 if (n_flag == 0 && !server) { 155 mod_unloaded = 1; 156 157 /* get the module id for this driver */ 158 get_modid(driver_name, &modid); 159 160 /* module is installed */ 161 if (modid != -1) { 162 if (modctl(MODUNLOAD, modid) < 0) { 163 perror(NULL); 164 (void) fprintf(stderr, gettext(ERR_MODUN), 165 driver_name); 166 mod_unloaded = 0; 167 } 168 } 169 /* unload driver.conf file */ 170 if (modctl(MODUNLOADDRVCONF, (major_t)found) < 0) { 171 perror(NULL); 172 (void) fprintf(stderr, 173 gettext("cannot unload %s.conf\n"), driver_name); 174 } 175 } 176 177 if (mod_unloaded && (modctl(MODREMMAJBIND, (major_t)found) < 0)) { 178 perror(NULL); 179 (void) fprintf(stderr, gettext(ERR_MODREMMAJ), found); 180 } 181 /* 182 * add driver to rem_name_to_major; if this fails, don`t 183 * delete from name_to_major 184 */ 185 (void) sprintf(maj_num, "%d", found); 186 187 if (append_to_file(driver_name, maj_num, 188 rem_name_to_major, ' ', " ", 0) == ERROR) { 189 (void) fprintf(stderr, gettext(ERR_NO_UPDATE), 190 rem_name_to_major); 191 err_exit(); 192 } 193 194 /* 195 * If removing the driver from the running system, notify 196 * kernel dynamically to remove minor perm entries. 197 */ 198 if ((n_flag == 0) && 199 (basedir == NULL || (strcmp(basedir, "/") == 0))) { 200 err = devfs_rm_minor_perm(driver_name, log_minorperm_error); 201 if (err != 0) { 202 (void) fprintf(stderr, gettext(ERR_UPDATE_PERM), 203 driver_name, err); 204 } 205 } 206 207 /* 208 * delete references to driver in add_drv/rem_drv database 209 */ 210 remove_entry(CLEAN_ALL, driver_name); 211 212 /* 213 * Optionally clean up any dangling devfs shadow nodes for 214 * this driver so that, in the event the driver is re-added 215 * to the system, newly created nodes won't incorrectly 216 * pick up these stale shadow node permissions. 217 */ 218 if ((n_flag == 0) && cleanup) { 219 if ((basedir == NULL || (strcmp(basedir, "/") == 0))) { 220 err = modctl(MODREMDRVCLEANUP, driver_name, 0, NULL); 221 if (err != 0) { 222 (void) fprintf(stderr, 223 gettext(ERR_REMDRV_CLEANUP), 224 driver_name, err); 225 } 226 } else if (strcmp(basedir, "/") != 0) { 227 cleanup_devfs_attributes(basedir, driver_name); 228 } 229 } 230 231 exit_unlock(); 232 233 return (NOERR); 234 } 235 236 /* 237 * Optionally remove attribute nodes for a driver when 238 * removing drivers on a mounted root image. Useful 239 * when reprovisioning a machine to return to default 240 * permission/ownership settings if the driver is 241 * re-installed. 242 */ 243 typedef struct cleanup_arg { 244 char *ca_basedir; 245 char *ca_drvname; 246 } cleanup_arg_t; 247 248 249 /* 250 * Callback to remove a minor node for a device 251 */ 252 /*ARGSUSED*/ 253 static int 254 cleanup_minor_walker(void *cb_arg, const char *minor_path) 255 { 256 if (unlink(minor_path) == -1) { 257 (void) fprintf(stderr, "rem_drv: error removing %s - %s\n", 258 minor_path, strerror(errno)); 259 } 260 return (DI_WALK_CONTINUE); 261 } 262 263 /* 264 * Callback for each device registered in the binding file (path_to_inst) 265 */ 266 /*ARGSUSED*/ 267 static int 268 cleanup_device_walker(void *cb_arg, const char *inst_path, 269 int inst_number, const char *inst_driver) 270 { 271 char path[MAXPATHLEN]; 272 cleanup_arg_t *arg = (cleanup_arg_t *)cb_arg; 273 int rv = DI_WALK_CONTINUE; 274 275 if (strcmp(inst_driver, arg->ca_drvname) == 0) { 276 if (snprintf(path, MAXPATHLEN, "%s/devices%s", 277 arg->ca_basedir, inst_path) < MAXPATHLEN) { 278 rv = devfs_walk_minor_nodes(path, 279 cleanup_minor_walker, NULL); 280 } 281 } 282 return (rv); 283 } 284 285 static void 286 cleanup_devfs_attributes(char *basedir, char *driver_name) 287 { 288 cleanup_arg_t arg; 289 char binding_path[MAXPATHLEN+1]; 290 291 (void) snprintf(binding_path, MAXPATHLEN, 292 "%s%s", basedir, INSTANCE_FILE); 293 294 arg.ca_basedir = basedir; 295 arg.ca_drvname = driver_name; 296 (void) devfs_parse_binding_file(binding_path, 297 cleanup_device_walker, (void *)&arg); 298 } 299 300 static void 301 usage() 302 { 303 (void) fprintf(stderr, gettext(REM_USAGE1)); 304 } 305