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rump_allserver.c revision 1.11 
      1 /*	$NetBSD: rump_allserver.c,v 1.11 2010/12/15 19:07:43 pooka Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2010 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 #ifndef lint
     30 __RCSID("$NetBSD: rump_allserver.c,v 1.11 2010/12/15 19:07:43 pooka Exp $");
     31 #endif /* !lint */
     32 
     33 #include <sys/types.h>
     34 #include <sys/signal.h>
     35 #include <sys/module.h>
     36 
     37 #include <rump/rump.h>
     38 #include <rump/rump_syscalls.h>
     39 
     40 #include <dlfcn.h>
     41 #include <err.h>
     42 #include <errno.h>
     43 #include <fcntl.h>
     44 #include <semaphore.h>
     45 #include <stdio.h>
     46 #include <stdlib.h>
     47 #include <string.h>
     48 #include <unistd.h>
     49 
     50 static void
     51 usage(void)
     52 {
     53 
     54 	fprintf(stderr, "usage: %s [-s] [-d drivespec] [-l libs] [-m modules] "
     55 	    "bindurl\n", getprogname());
     56 	exit(1);
     57 }
     58 
     59 static void
     60 die(int sflag, int error, const char *reason)
     61 {
     62 
     63 	warnx("%s: %s", reason, strerror(error));
     64 	if (!sflag)
     65 		rump_daemonize_done(error);
     66 	exit(1);
     67 }
     68 
     69 static sem_t sigsem;
     70 static void
     71 sigreboot(int sig)
     72 {
     73 
     74 	sem_post(&sigsem);
     75 }
     76 
     77 static const char *const disktokens[] = {
     78 #define DKEY 0
     79 	"key",
     80 #define DFILE 1
     81 	"hostpath",
     82 #define DSIZE 2
     83 	"size",
     84 	NULL
     85 };
     86 
     87 struct etfsreg {
     88 	const char *key;
     89 	const char *hostpath;
     90 	off_t flen;
     91 	enum rump_etfs_type type;
     92 };
     93 
     94 int
     95 main(int argc, char *argv[])
     96 {
     97 	const char *serverurl;
     98 	char **modarray = NULL;
     99 	unsigned nmods = 0, curmod = 0, i;
    100 	struct etfsreg *etfs = NULL;
    101 	unsigned netfs = 0, curetfs = 0;
    102 	int error;
    103 	int ch, sflag;
    104 
    105 	setprogname(argv[0]);
    106 
    107 	sflag = 0;
    108 	while ((ch = getopt(argc, argv, "d:l:m:s")) != -1) {
    109 		switch (ch) {
    110 		case 'd': {
    111 			char *options, *value;
    112 			char *key, *hostpath;
    113 			long long flen;
    114 
    115 			flen = 0;
    116 			key = hostpath = NULL;
    117 			options = optarg;
    118 			while (*options) {
    119 				switch (getsubopt(&options,
    120 				    __UNCONST(disktokens), &value)) {
    121 				case DKEY:
    122 					if (key != NULL) {
    123 						fprintf(stderr,
    124 						    "key already given\n");
    125 						usage();
    126 					}
    127 					key = value;
    128 					break;
    129 				case DFILE:
    130 					if (hostpath != NULL) {
    131 						fprintf(stderr,
    132 						    "hostpath already given\n");
    133 						usage();
    134 					}
    135 					hostpath = value;
    136 					break;
    137 				case DSIZE:
    138 					if (flen != 0) {
    139 						fprintf(stderr,
    140 						    "size already given\n");
    141 						usage();
    142 					}
    143 					/* XXX: off_t max? */
    144 					flen = strsuftoll("-d size", value,
    145 					    0, LLONG_MAX);
    146 					break;
    147 				default:
    148 					fprintf(stderr, "invalid dtoken\n");
    149 					usage();
    150 					break;
    151 				}
    152 			}
    153 
    154 			if (key == NULL || hostpath == NULL || flen == 0) {
    155 				fprintf(stderr, "incomplete drivespec\n");
    156 				usage();
    157 			}
    158 
    159 			if (netfs - curetfs == 0) {
    160 				etfs = realloc(etfs, (netfs+16)*sizeof(*etfs));
    161 				if (etfs == NULL)
    162 					err(1, "realloc etfs");
    163 				netfs += 16;
    164 			}
    165 
    166 			etfs[curetfs].key = key;
    167 			etfs[curetfs].hostpath = hostpath;
    168 			etfs[curetfs].flen = flen;
    169 			etfs[curetfs].type = RUMP_ETFS_BLK;
    170 			curetfs++;
    171 
    172 			break;
    173 		}
    174 		case 'l':
    175 			if (dlopen(optarg, RTLD_LAZY|RTLD_GLOBAL) == NULL) {
    176 				char pb[MAXPATHLEN];
    177 				/* try to mimic linker -l syntax */
    178 
    179 				snprintf(pb, sizeof(pb), "lib%s.so", optarg);
    180 				if (dlopen(pb, RTLD_LAZY|RTLD_GLOBAL) == NULL) {
    181 					errx(1, "dlopen %s failed: %s",
    182 					    pb, dlerror());
    183 				}
    184 			}
    185 			break;
    186 		case 'm':
    187 			if (nmods - curmod == 0) {
    188 				modarray = realloc(modarray,
    189 				    (nmods+16) * sizeof(char *));
    190 				if (modarray == NULL)
    191 					err(1, "realloc");
    192 				nmods += 16;
    193 			}
    194 			modarray[curmod++] = optarg;
    195 			break;
    196 		case 's':
    197 			sflag = 1;
    198 			break;
    199 		default:
    200 			usage();
    201 			/*NOTREACHED*/
    202 		}
    203 	}
    204 
    205 	argc -= optind;
    206 	argv += optind;
    207 
    208 	if (argc != 1)
    209 		usage();
    210 
    211 	serverurl = argv[0];
    212 
    213 	if (!sflag) {
    214 		error = rump_daemonize_begin();
    215 		if (error)
    216 			errx(1, "rump daemonize: %s", strerror(error));
    217 	}
    218 
    219 	error = rump_init();
    220 	if (error)
    221 		die(sflag, error, "rump init failed");
    222 
    223 	/* load modules */
    224 	for (i = 0; i < curmod; i++) {
    225 		struct modctl_load ml;
    226 
    227 #define ETFSKEY "/module.mod"
    228 		if ((error = rump_pub_etfs_register(ETFSKEY,
    229 		    modarray[0], RUMP_ETFS_REG)) != 0)
    230 			die(sflag, error, "module etfs register failed");
    231 		memset(&ml, 0, sizeof(ml));
    232 		ml.ml_filename = ETFSKEY;
    233 		if (rump_sys_modctl(MODCTL_LOAD, &ml) == -1)
    234 			die(sflag, errno, "module load failed");
    235 		rump_pub_etfs_remove(ETFSKEY);
    236 #undef ETFSKEY
    237 	}
    238 
    239 	/* register host drives */
    240 	for (i = 0; i < curetfs; i++) {
    241 		int fd;
    242 
    243 		fd = open(etfs[i].hostpath, O_RDWR | O_CREAT, 0755);
    244 		if (fd == -1)
    245 			die(sflag, error, "etfs hostpath create");
    246 		if (ftruncate(fd, etfs[i].flen) == -1)
    247 			die(sflag, error, "truncate");
    248 		close(fd);
    249 
    250 		if ((error = rump_pub_etfs_register(etfs[i].key,
    251 		    etfs[i].hostpath, etfs[i].type)) != 0)
    252 			die(sflag, error, "etfs register");
    253 	}
    254 
    255 	error = rump_init_server(serverurl);
    256 	if (error)
    257 		die(sflag, error, "rump server init failed");
    258 
    259 	if (!sflag)
    260 		rump_daemonize_done(RUMP_DAEMONIZE_SUCCESS);
    261 
    262 	sem_init(&sigsem, 0, 0);
    263 	signal(SIGTERM, sigreboot);
    264 	signal(SIGINT, sigreboot);
    265 	sem_wait(&sigsem);
    266 
    267 	rump_sys_reboot(0, NULL);
    268 	/*NOTREACHED*/
    269 
    270 	return 0;
    271 }
    272