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rump_allserver.c revision 1.12 
      1 /*	$NetBSD: rump_allserver.c,v 1.12 2011/01/03 10:44:40 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 1.12 2011/01/03 10:44:40 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] [-c ncpu][-d drivespec] [-l libs] "
     55 	    "[-m modules] 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 	int ncpu;
    105 
    106 	setprogname(argv[0]);
    107 
    108 	sflag = 0;
    109 	while ((ch = getopt(argc, argv, "c:d:l:m:s")) != -1) {
    110 		switch (ch) {
    111 		case 'c':
    112 			ncpu = atoi(optarg);
    113 			/* XXX: MAXCPUS is from host, not from kernel */
    114 			if (ncpu < 1 || ncpu > MAXCPUS)
    115 				err(1, "CPU count needs to be between "
    116 				    "1 and %d\n", MAXCPUS);
    117 			setenv("RUMP_NCPU", optarg, 1);
    118 			break;
    119 		case 'd': {
    120 			char *options, *value;
    121 			char *key, *hostpath;
    122 			long long flen;
    123 
    124 			flen = 0;
    125 			key = hostpath = NULL;
    126 			options = optarg;
    127 			while (*options) {
    128 				switch (getsubopt(&options,
    129 				    __UNCONST(disktokens), &value)) {
    130 				case DKEY:
    131 					if (key != NULL) {
    132 						fprintf(stderr,
    133 						    "key already given\n");
    134 						usage();
    135 					}
    136 					key = value;
    137 					break;
    138 				case DFILE:
    139 					if (hostpath != NULL) {
    140 						fprintf(stderr,
    141 						    "hostpath already given\n");
    142 						usage();
    143 					}
    144 					hostpath = value;
    145 					break;
    146 				case DSIZE:
    147 					if (flen != 0) {
    148 						fprintf(stderr,
    149 						    "size already given\n");
    150 						usage();
    151 					}
    152 					/* XXX: off_t max? */
    153 					flen = strsuftoll("-d size", value,
    154 					    0, LLONG_MAX);
    155 					break;
    156 				default:
    157 					fprintf(stderr, "invalid dtoken\n");
    158 					usage();
    159 					break;
    160 				}
    161 			}
    162 
    163 			if (key == NULL || hostpath == NULL || flen == 0) {
    164 				fprintf(stderr, "incomplete drivespec\n");
    165 				usage();
    166 			}
    167 
    168 			if (netfs - curetfs == 0) {
    169 				etfs = realloc(etfs, (netfs+16)*sizeof(*etfs));
    170 				if (etfs == NULL)
    171 					err(1, "realloc etfs");
    172 				netfs += 16;
    173 			}
    174 
    175 			etfs[curetfs].key = key;
    176 			etfs[curetfs].hostpath = hostpath;
    177 			etfs[curetfs].flen = flen;
    178 			etfs[curetfs].type = RUMP_ETFS_BLK;
    179 			curetfs++;
    180 
    181 			break;
    182 		}
    183 		case 'l':
    184 			if (dlopen(optarg, RTLD_LAZY|RTLD_GLOBAL) == NULL) {
    185 				char pb[MAXPATHLEN];
    186 				/* try to mimic linker -l syntax */
    187 
    188 				snprintf(pb, sizeof(pb), "lib%s.so", optarg);
    189 				if (dlopen(pb, RTLD_LAZY|RTLD_GLOBAL) == NULL) {
    190 					errx(1, "dlopen %s failed: %s",
    191 					    pb, dlerror());
    192 				}
    193 			}
    194 			break;
    195 		case 'm':
    196 			if (nmods - curmod == 0) {
    197 				modarray = realloc(modarray,
    198 				    (nmods+16) * sizeof(char *));
    199 				if (modarray == NULL)
    200 					err(1, "realloc");
    201 				nmods += 16;
    202 			}
    203 			modarray[curmod++] = optarg;
    204 			break;
    205 		case 's':
    206 			sflag = 1;
    207 			break;
    208 		default:
    209 			usage();
    210 			/*NOTREACHED*/
    211 		}
    212 	}
    213 
    214 	argc -= optind;
    215 	argv += optind;
    216 
    217 	if (argc != 1)
    218 		usage();
    219 
    220 	serverurl = argv[0];
    221 
    222 	if (!sflag) {
    223 		error = rump_daemonize_begin();
    224 		if (error)
    225 			errx(1, "rump daemonize: %s", strerror(error));
    226 	}
    227 
    228 	error = rump_init();
    229 	if (error)
    230 		die(sflag, error, "rump init failed");
    231 
    232 	/* load modules */
    233 	for (i = 0; i < curmod; i++) {
    234 		struct modctl_load ml;
    235 
    236 #define ETFSKEY "/module.mod"
    237 		if ((error = rump_pub_etfs_register(ETFSKEY,
    238 		    modarray[0], RUMP_ETFS_REG)) != 0)
    239 			die(sflag, error, "module etfs register failed");
    240 		memset(&ml, 0, sizeof(ml));
    241 		ml.ml_filename = ETFSKEY;
    242 		if (rump_sys_modctl(MODCTL_LOAD, &ml) == -1)
    243 			die(sflag, errno, "module load failed");
    244 		rump_pub_etfs_remove(ETFSKEY);
    245 #undef ETFSKEY
    246 	}
    247 
    248 	/* register host drives */
    249 	for (i = 0; i < curetfs; i++) {
    250 		int fd;
    251 
    252 		fd = open(etfs[i].hostpath, O_RDWR | O_CREAT, 0755);
    253 		if (fd == -1)
    254 			die(sflag, error, "etfs hostpath create");
    255 		if (ftruncate(fd, etfs[i].flen) == -1)
    256 			die(sflag, error, "truncate");
    257 		close(fd);
    258 
    259 		if ((error = rump_pub_etfs_register(etfs[i].key,
    260 		    etfs[i].hostpath, etfs[i].type)) != 0)
    261 			die(sflag, error, "etfs register");
    262 	}
    263 
    264 	error = rump_init_server(serverurl);
    265 	if (error)
    266 		die(sflag, error, "rump server init failed");
    267 
    268 	if (!sflag)
    269 		rump_daemonize_done(RUMP_DAEMONIZE_SUCCESS);
    270 
    271 	sem_init(&sigsem, 0, 0);
    272 	signal(SIGTERM, sigreboot);
    273 	signal(SIGINT, sigreboot);
    274 	sem_wait(&sigsem);
    275 
    276 	rump_sys_reboot(0, NULL);
    277 	/*NOTREACHED*/
    278 
    279 	return 0;
    280 }
    281