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 * autod_autofs.c 23 * 24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #include <stdio.h> 29 #include <unistd.h> 30 #include <stdlib.h> 31 #include <ctype.h> 32 #include <sys/param.h> 33 #include <sys/stat.h> 34 #include <sys/mntent.h> 35 #include <sys/mnttab.h> 36 #include <sys/mount.h> 37 #include <sys/utsname.h> 38 #include <sys/tiuser.h> 39 #include <syslog.h> 40 #include <string.h> 41 #include <errno.h> 42 #include <fslib.h> 43 #include <sys/vfs.h> 44 #include <assert.h> 45 #include "automount.h" 46 47 static int process_opts(char *options, int *directp, int *sawnestp); 48 void netbuf_free(struct netbuf *); 49 50 int 51 mount_autofs( 52 struct mapent *me, 53 char *mntpnt, 54 action_list *alp, 55 char *rootp, 56 char *subdir, 57 char *key 58 ) 59 { 60 int mntflags = 0; 61 struct utsname utsname; 62 autofs_args *fnip = NULL; 63 int mount_timeout = AUTOFS_MOUNT_TIMEOUT; 64 int sawnest, len, error = 0; 65 char *buf, rel_mntpnt[MAXPATHLEN]; 66 67 if (trace > 1) 68 trace_prt(1, " mount_autofs %s on %s\n", 69 me->map_fs->mfs_dir, mntpnt); 70 71 if (strcmp(mntpnt, "/-") == 0) { 72 syslog(LOG_ERR, "invalid mountpoint: /-"); 73 return (ENOENT); 74 } 75 76 /* 77 * get relative mountpoint 78 */ 79 sprintf(rel_mntpnt, ".%s", mntpnt+strlen(rootp)); 80 81 if (trace > 2) 82 trace_prt(1, "rel_mntpnt = %s\n", rel_mntpnt); 83 84 if (uname(&utsname) < 0) { 85 error = errno; 86 syslog(LOG_ERR, "uname %s", strerror(error)); 87 return (error); 88 } 89 90 if ((fnip = (autofs_args *) 91 malloc(sizeof (autofs_args))) == NULL) { 92 goto free_mem; 93 } 94 (void) memset((void *) fnip, 0, sizeof (*fnip)); 95 96 if ((fnip->addr.buf = (char *)malloc(MAXADDRLEN)) == NULL) 97 goto free_mem; 98 99 (void) strcpy(fnip->addr.buf, utsname.nodename); 100 (void) strcat(fnip->addr.buf, ".autofs"); 101 102 if ((fnip->opts = malloc(MAX_MNTOPT_STR)) == NULL) 103 goto free_mem; 104 strcpy(fnip->opts, me->map_mntopts); 105 106 if (process_opts(fnip->opts, &fnip->direct, &sawnest) != 0) 107 goto free_mem; 108 109 fnip->addr.len = strlen(fnip->addr.buf); 110 fnip->addr.maxlen = fnip->addr.len; 111 112 /* 113 * get absolute mountpoint 114 */ 115 if ((fnip->path = strdup(mntpnt)) == NULL) 116 goto free_mem; 117 if ((fnip->map = strdup(me->map_fs->mfs_dir)) == NULL) 118 goto free_mem; 119 if ((fnip->subdir = strdup(subdir)) == NULL) 120 goto free_mem; 121 122 /* 123 * This timeout is really ignored by autofs, it uses the 124 * parent directory's timeout since it's really the one 125 * specified/inherited from the original mount by 'automount' 126 */ 127 fnip->mount_to = mount_timeout; /* IGNORED */ 128 fnip->rpc_to = AUTOFS_RPC_TIMEOUT; 129 130 if (fnip->direct) { 131 if (me->map_modified == TRUE || me->map_faked == TRUE) { 132 if ((fnip->key = strdup(key)) == NULL) 133 goto free_mem; 134 } else { 135 /* wierd case of a direct map pointer in another map */ 136 if ((fnip->key = strdup(fnip->path)) == NULL) 137 goto free_mem; 138 } 139 } else { 140 fnip->key = NULL; 141 } 142 143 /* 144 * Fill out action list. 145 */ 146 alp->action.action = AUTOFS_MOUNT_RQ; 147 if ((alp->action.action_list_entry_u.mounta.spec = 148 strdup(me->map_fs->mfs_dir)) == NULL) 149 goto free_mem; 150 if ((alp->action.action_list_entry_u.mounta.dir = 151 strdup(rel_mntpnt)) == NULL) 152 goto free_mem; 153 154 len = strlen(fnip->opts); 155 /* 156 * Get a buffer for the option string, it holds the map options plus 157 * space for "nest" if it isn't already in the option string 158 */ 159 if ((buf = (char *)malloc(MAX_MNTOPT_STR)) == NULL) 160 goto free_mem; 161 strcpy(buf, fnip->opts); 162 if (!sawnest) { 163 if (len + strlen(",nest") + 1 > MAX_MNTOPT_STR) 164 goto free_mem; 165 if (len) 166 (void) strcat(buf, ","); 167 (void) strcat(buf, "nest"); 168 } 169 alp->action.action_list_entry_u.mounta.optptr = buf; 170 alp->action.action_list_entry_u.mounta.optlen = strlen(buf) + 1; 171 alp->action.action_list_entry_u.mounta.flags = 172 mntflags | MS_DATA | MS_OPTIONSTR; 173 if ((alp->action.action_list_entry_u.mounta.fstype = 174 strdup(MNTTYPE_AUTOFS)) == NULL) 175 goto free_mem; 176 alp->action.action_list_entry_u.mounta.dataptr = (char *)fnip; 177 alp->action.action_list_entry_u.mounta.datalen = sizeof (*fnip); 178 179 return (0); 180 181 free_mem: 182 /* 183 * We got an error, free the memory we allocated. 184 */ 185 syslog(LOG_ERR, "mount_autofs: memory allocation failure"); 186 free_autofs_args(fnip); 187 alp->action.action_list_entry_u.mounta.dataptr = NULL; 188 alp->action.action_list_entry_u.mounta.datalen = 0; 189 free_mounta(&alp->action.action_list_entry_u.mounta); 190 191 return (error ? error : ENOMEM); 192 } 193 194 /* 195 * Set *directp to 1 if "direct" is found, and 0 otherwise 196 * (mounts are indirect by default). If both "direct" and "indirect" are 197 * found, the last one wins. 198 */ 199 static int 200 process_opts(char *options, int *directp, int *sawnestp) 201 { 202 char *opt, *opts, *lasts; 203 char buf[AUTOFS_MAXOPTSLEN]; 204 205 assert(strlen(options)+1 < AUTOFS_MAXOPTSLEN); 206 207 *sawnestp = 0; 208 strcpy(buf, options); 209 opts = buf; 210 options[0] = '\0'; 211 *directp = 0; 212 213 while ((opt = strtok_r(opts, ",", &lasts)) != NULL) { 214 opts = NULL; 215 while (isspace(*opt)) { 216 opt++; 217 } 218 if (strcmp(opt, "direct") == 0) { 219 *directp = 1; 220 } else if (strcmp(opt, "indirect") == 0) { 221 *directp = 0; 222 } else if (strcmp(opt, "ignore") != 0) { 223 if (strcmp(opt, "nest") == 0) { 224 *sawnestp = 1; 225 } 226 if (options[0] != '\0') { 227 (void) strcat(options, ","); 228 } 229 (void) strcat(options, opt); 230 } 231 }; 232 return (0); 233 } 234 235 /* 236 * Free autofs_args structure 237 */ 238 void 239 free_autofs_args(autofs_args *p) 240 { 241 if (p == NULL) 242 return; 243 if (p->addr.buf) 244 free(p->addr.buf); 245 if (p->path) 246 free(p->path); 247 if (p->opts) 248 free(p->opts); 249 if (p->map) 250 free(p->map); 251 if (p->subdir) 252 free(p->subdir); 253 if (p->key) 254 free(p->key); 255 free(p); 256 } 257 258 /* 259 * free mounta structure. Assumes that m->dataptr has 260 * been freed already 261 */ 262 void 263 free_mounta(struct mounta *m) 264 { 265 if (m == NULL) 266 return; 267 if (m->spec) 268 free(m->spec); 269 if (m->dir) 270 free(m->dir); 271 if (m->fstype) 272 free(m->fstype); 273 if (m->optptr) 274 free(m->optptr); 275 assert(m->dataptr == NULL); 276 assert(m->datalen == 0); 277 /* 278 * no need to free 'm' since it is part of the 279 * action_list_entry structure. 280 */ 281 } 282