ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 1 | /* |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 2 | * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> |
| 3 | * |
| 4 | * Network Block Device |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; under version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 17 | */ |
| 18 | |
Stefan Weil | 5a61cb6 | 2011-09-08 17:55:32 +0200 | [diff] [blame] | 19 | #include "qemu-common.h" |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 20 | #include "sysemu/block-backend.h" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 21 | #include "block/block_int.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 22 | #include "block/nbd.h" |
Alex Bligh | 6a1751b | 2013-08-21 16:02:47 +0100 | [diff] [blame] | 23 | #include "qemu/main-loop.h" |
Paolo Bonzini | 537b41f | 2014-02-17 14:43:51 +0100 | [diff] [blame] | 24 | #include "qemu/sockets.h" |
| 25 | #include "qemu/error-report.h" |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 26 | #include "block/snapshot.h" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 27 | #include "qapi/util.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 28 | #include "qapi/qmp/qstring.h" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 29 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 30 | #include <stdarg.h> |
| 31 | #include <stdio.h> |
| 32 | #include <getopt.h> |
| 33 | #include <err.h> |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 34 | #include <sys/types.h> |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 35 | #include <sys/socket.h> |
| 36 | #include <netinet/in.h> |
| 37 | #include <netinet/tcp.h> |
| 38 | #include <arpa/inet.h> |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 39 | #include <signal.h> |
Blue Swirl | 2bff4b6 | 2009-12-23 15:34:04 +0000 | [diff] [blame] | 40 | #include <libgen.h> |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 41 | #include <pthread.h> |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 42 | |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 43 | #define SOCKET_PATH "/var/lock/qemu-nbd-%s" |
| 44 | #define QEMU_NBD_OPT_CACHE 1 |
| 45 | #define QEMU_NBD_OPT_AIO 2 |
| 46 | #define QEMU_NBD_OPT_DISCARD 3 |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 47 | #define QEMU_NBD_OPT_DETECT_ZEROES 4 |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 48 | |
Paolo Bonzini | af49bbb | 2011-09-19 14:03:37 +0200 | [diff] [blame] | 49 | static NBDExport *exp; |
blueswir1 | b1d8e52 | 2008-10-26 13:43:07 +0000 | [diff] [blame] | 50 | static int verbose; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 51 | static char *srcpath; |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 52 | static SocketAddress *saddr; |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 53 | static int persistent = 0; |
| 54 | static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 55 | static int shared = 1; |
| 56 | static int nb_fds; |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 57 | static int server_fd; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 58 | |
| 59 | static void usage(const char *name) |
| 60 | { |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 61 | (printf) ( |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 62 | "Usage: %s [OPTIONS] FILE\n" |
| 63 | "QEMU Disk Network Block Device Server\n" |
| 64 | "\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 65 | " -h, --help display this help and exit\n" |
| 66 | " -V, --version output version information and exit\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 67 | "\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 68 | "Connection properties:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 69 | " -p, --port=PORT port to listen on (default `%d')\n" |
| 70 | " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" |
| 71 | " -k, --socket=PATH path to the unix socket\n" |
| 72 | " (default '"SOCKET_PATH"')\n" |
| 73 | " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" |
| 74 | " -t, --persistent don't exit on the last connection\n" |
| 75 | " -v, --verbose display extra debugging information\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 76 | "\n" |
| 77 | "Exposing part of the image:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 78 | " -o, --offset=OFFSET offset into the image\n" |
| 79 | " -P, --partition=NUM only expose partition NUM\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 80 | "\n" |
| 81 | #ifdef __linux__ |
| 82 | "Kernel NBD client support:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 83 | " -c, --connect=DEV connect FILE to the local NBD device DEV\n" |
| 84 | " -d, --disconnect disconnect the specified device\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 85 | "\n" |
| 86 | #endif |
| 87 | "\n" |
| 88 | "Block device options:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 89 | " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" |
| 90 | " -r, --read-only export read-only\n" |
| 91 | " -s, --snapshot use FILE as an external snapshot, create a temporary\n" |
| 92 | " file with backing_file=FILE, redirect the write to\n" |
| 93 | " the temporary one\n" |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 94 | " -l, --load-snapshot=SNAPSHOT_PARAM\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 95 | " load an internal snapshot inside FILE and export it\n" |
| 96 | " as an read-only device, SNAPSHOT_PARAM format is\n" |
| 97 | " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" |
| 98 | " '[ID_OR_NAME]'\n" |
| 99 | " -n, --nocache disable host cache\n" |
| 100 | " --cache=MODE set cache mode (none, writeback, ...)\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 101 | " --aio=MODE set AIO mode (native or threads)\n" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 102 | " --discard=MODE set discard mode (ignore, unmap)\n" |
Andrey Korolyov | 6883de6 | 2015-07-31 22:12:54 +0300 | [diff] [blame] | 103 | " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 104 | "\n" |
| 105 | "Report bugs to <qemu-devel@nongnu.org>\n" |
Laurent Vivier | c2e2872 | 2010-09-17 20:37:25 +0200 | [diff] [blame] | 106 | , name, NBD_DEFAULT_PORT, "DEVICE"); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | static void version(const char *name) |
| 110 | { |
| 111 | printf( |
ths | 315bc7a | 2008-07-18 18:06:23 +0000 | [diff] [blame] | 112 | "%s version 0.0.1\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 113 | "Written by Anthony Liguori.\n" |
| 114 | "\n" |
| 115 | "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" |
| 116 | "This is free software; see the source for copying conditions. There is NO\n" |
| 117 | "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" |
ths | 315bc7a | 2008-07-18 18:06:23 +0000 | [diff] [blame] | 118 | , name); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | struct partition_record |
| 122 | { |
| 123 | uint8_t bootable; |
| 124 | uint8_t start_head; |
| 125 | uint32_t start_cylinder; |
| 126 | uint8_t start_sector; |
| 127 | uint8_t system; |
| 128 | uint8_t end_head; |
| 129 | uint8_t end_cylinder; |
| 130 | uint8_t end_sector; |
| 131 | uint32_t start_sector_abs; |
| 132 | uint32_t nb_sectors_abs; |
| 133 | }; |
| 134 | |
| 135 | static void read_partition(uint8_t *p, struct partition_record *r) |
| 136 | { |
| 137 | r->bootable = p[0]; |
| 138 | r->start_head = p[1]; |
| 139 | r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); |
| 140 | r->start_sector = p[2] & 0x3f; |
| 141 | r->system = p[4]; |
| 142 | r->end_head = p[5]; |
| 143 | r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); |
| 144 | r->end_sector = p[6] & 0x3f; |
Max Reitz | ac97393 | 2015-02-25 13:08:23 -0500 | [diff] [blame] | 145 | |
| 146 | r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8)); |
| 147 | r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12)); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 148 | } |
| 149 | |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 150 | static int find_partition(BlockBackend *blk, int partition, |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 151 | off_t *offset, off_t *size) |
| 152 | { |
| 153 | struct partition_record mbr[4]; |
| 154 | uint8_t data[512]; |
| 155 | int i; |
| 156 | int ext_partnum = 4; |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 157 | int ret; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 158 | |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 159 | if ((ret = blk_read(blk, 0, data, 1)) < 0) { |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 160 | errno = -ret; |
| 161 | err(EXIT_FAILURE, "error while reading"); |
| 162 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 163 | |
| 164 | if (data[510] != 0x55 || data[511] != 0xaa) { |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 165 | return -EINVAL; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | for (i = 0; i < 4; i++) { |
| 169 | read_partition(&data[446 + 16 * i], &mbr[i]); |
| 170 | |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 171 | if (!mbr[i].system || !mbr[i].nb_sectors_abs) { |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 172 | continue; |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 173 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 174 | |
| 175 | if (mbr[i].system == 0xF || mbr[i].system == 0x5) { |
| 176 | struct partition_record ext[4]; |
| 177 | uint8_t data1[512]; |
| 178 | int j; |
| 179 | |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 180 | if ((ret = blk_read(blk, mbr[i].start_sector_abs, data1, 1)) < 0) { |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 181 | errno = -ret; |
| 182 | err(EXIT_FAILURE, "error while reading"); |
| 183 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 184 | |
| 185 | for (j = 0; j < 4; j++) { |
| 186 | read_partition(&data1[446 + 16 * j], &ext[j]); |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 187 | if (!ext[j].system || !ext[j].nb_sectors_abs) { |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 188 | continue; |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 189 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 190 | |
| 191 | if ((ext_partnum + j + 1) == partition) { |
| 192 | *offset = (uint64_t)ext[j].start_sector_abs << 9; |
| 193 | *size = (uint64_t)ext[j].nb_sectors_abs << 9; |
| 194 | return 0; |
| 195 | } |
| 196 | } |
| 197 | ext_partnum += 4; |
| 198 | } else if ((i + 1) == partition) { |
| 199 | *offset = (uint64_t)mbr[i].start_sector_abs << 9; |
| 200 | *size = (uint64_t)mbr[i].nb_sectors_abs << 9; |
| 201 | return 0; |
| 202 | } |
| 203 | } |
| 204 | |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 205 | return -ENOENT; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 206 | } |
| 207 | |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 208 | static void termsig_handler(int signum) |
| 209 | { |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 210 | state = TERMINATE; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 211 | qemu_notify_event(); |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 212 | } |
| 213 | |
Paolo Bonzini | 537b41f | 2014-02-17 14:43:51 +0100 | [diff] [blame] | 214 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 215 | static void *show_parts(void *arg) |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 216 | { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 217 | char *device = arg; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 218 | int nbd; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 219 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 220 | /* linux just needs an open() to trigger |
| 221 | * the partition table update |
| 222 | * but remember to load the module with max_part != 0 : |
| 223 | * modprobe nbd max_part=63 |
| 224 | */ |
| 225 | nbd = open(device, O_RDWR); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 226 | if (nbd >= 0) { |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 227 | close(nbd); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 228 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 229 | return NULL; |
| 230 | } |
| 231 | |
| 232 | static void *nbd_client_thread(void *arg) |
| 233 | { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 234 | char *device = arg; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 235 | off_t size; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 236 | uint32_t nbdflags; |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 237 | int fd, sock; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 238 | int ret; |
| 239 | pthread_t show_parts_thread; |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 240 | Error *local_error = NULL; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 241 | |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 242 | |
| 243 | sock = socket_connect(saddr, &local_error, NULL, NULL); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 244 | if (sock < 0) { |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 245 | error_report_err(local_error); |
Stefan Hajnoczi | dc10e8b | 2012-01-05 13:16:07 +0000 | [diff] [blame] | 246 | goto out; |
| 247 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 248 | |
| 249 | ret = nbd_receive_negotiate(sock, NULL, &nbdflags, |
Max Reitz | 3f47265 | 2015-02-25 13:08:25 -0500 | [diff] [blame] | 250 | &size, &local_error); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 251 | if (ret < 0) { |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 252 | if (local_error) { |
| 253 | fprintf(stderr, "%s\n", error_get_pretty(local_error)); |
| 254 | error_free(local_error); |
| 255 | } |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 256 | goto out_socket; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 257 | } |
| 258 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 259 | fd = open(device, O_RDWR); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 260 | if (fd < 0) { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 261 | /* Linux-only, we can use %m in printf. */ |
Hani Benhabiles | 5672ee5 | 2014-05-13 00:35:16 +0100 | [diff] [blame] | 262 | fprintf(stderr, "Failed to open %s: %m\n", device); |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 263 | goto out_socket; |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 264 | } |
| 265 | |
Max Reitz | 3f47265 | 2015-02-25 13:08:25 -0500 | [diff] [blame] | 266 | ret = nbd_init(fd, sock, nbdflags, size); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 267 | if (ret < 0) { |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 268 | goto out_fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | /* update partition table */ |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 272 | pthread_create(&show_parts_thread, NULL, show_parts, device); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 273 | |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 274 | if (verbose) { |
| 275 | fprintf(stderr, "NBD device %s is now connected to %s\n", |
| 276 | device, srcpath); |
| 277 | } else { |
| 278 | /* Close stderr so that the qemu-nbd process exits. */ |
| 279 | dup2(STDOUT_FILENO, STDERR_FILENO); |
| 280 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 281 | |
| 282 | ret = nbd_client(fd); |
| 283 | if (ret) { |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 284 | goto out_fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 285 | } |
| 286 | close(fd); |
| 287 | kill(getpid(), SIGTERM); |
| 288 | return (void *) EXIT_SUCCESS; |
| 289 | |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 290 | out_fd: |
| 291 | close(fd); |
| 292 | out_socket: |
| 293 | closesocket(sock); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 294 | out: |
| 295 | kill(getpid(), SIGTERM); |
| 296 | return (void *) EXIT_FAILURE; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 297 | } |
| 298 | |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 299 | static int nbd_can_accept(void) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 300 | { |
| 301 | return nb_fds < shared; |
| 302 | } |
| 303 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 304 | static void nbd_export_closed(NBDExport *exp) |
| 305 | { |
| 306 | assert(state == TERMINATING); |
| 307 | state = TERMINATED; |
| 308 | } |
| 309 | |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 310 | static void nbd_update_server_fd_handler(int fd); |
| 311 | |
Paolo Bonzini | 1743b51 | 2011-09-19 14:33:23 +0200 | [diff] [blame] | 312 | static void nbd_client_closed(NBDClient *client) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 313 | { |
Paolo Bonzini | 1743b51 | 2011-09-19 14:33:23 +0200 | [diff] [blame] | 314 | nb_fds--; |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 315 | if (nb_fds == 0 && !persistent && state == RUNNING) { |
| 316 | state = TERMINATE; |
| 317 | } |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 318 | nbd_update_server_fd_handler(server_fd); |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 319 | nbd_client_put(client); |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | static void nbd_accept(void *opaque) |
| 323 | { |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 324 | struct sockaddr_in addr; |
| 325 | socklen_t addr_len = sizeof(addr); |
| 326 | |
| 327 | int fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len); |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 328 | if (fd < 0) { |
| 329 | perror("accept"); |
| 330 | return; |
| 331 | } |
| 332 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 333 | if (state >= TERMINATE) { |
| 334 | close(fd); |
| 335 | return; |
| 336 | } |
| 337 | |
Hani Benhabiles | 36af599 | 2014-05-13 00:35:15 +0100 | [diff] [blame] | 338 | if (nbd_client_new(exp, fd, nbd_client_closed)) { |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 339 | nb_fds++; |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 340 | nbd_update_server_fd_handler(server_fd); |
Hani Benhabiles | 36af599 | 2014-05-13 00:35:15 +0100 | [diff] [blame] | 341 | } else { |
Hani Benhabiles | 27e5eae | 2014-05-31 22:39:42 +0100 | [diff] [blame] | 342 | shutdown(fd, 2); |
Hani Benhabiles | 36af599 | 2014-05-13 00:35:15 +0100 | [diff] [blame] | 343 | close(fd); |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 344 | } |
| 345 | } |
| 346 | |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 347 | static void nbd_update_server_fd_handler(int fd) |
| 348 | { |
| 349 | if (nbd_can_accept()) { |
| 350 | qemu_set_fd_handler(fd, nbd_accept, NULL, (void *)(uintptr_t)fd); |
| 351 | } else { |
| 352 | qemu_set_fd_handler(fd, NULL, NULL, NULL); |
| 353 | } |
| 354 | } |
| 355 | |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 356 | |
| 357 | static SocketAddress *nbd_build_socket_address(const char *sockpath, |
| 358 | const char *bindto, |
| 359 | const char *port) |
| 360 | { |
| 361 | SocketAddress *saddr; |
| 362 | |
| 363 | saddr = g_new0(SocketAddress, 1); |
| 364 | if (sockpath) { |
Eric Blake | 2d32add | 2015-10-26 16:34:55 -0600 | [diff] [blame] | 365 | saddr->type = SOCKET_ADDRESS_KIND_UNIX; |
| 366 | saddr->u.q_unix = g_new0(UnixSocketAddress, 1); |
| 367 | saddr->u.q_unix->path = g_strdup(sockpath); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 368 | } else { |
Eric Blake | 2d32add | 2015-10-26 16:34:55 -0600 | [diff] [blame] | 369 | saddr->type = SOCKET_ADDRESS_KIND_INET; |
| 370 | saddr->u.inet = g_new0(InetSocketAddress, 1); |
| 371 | saddr->u.inet->host = g_strdup(bindto); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 372 | if (port) { |
Eric Blake | 2d32add | 2015-10-26 16:34:55 -0600 | [diff] [blame] | 373 | saddr->u.inet->port = g_strdup(port); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 374 | } else { |
Eric Blake | 2d32add | 2015-10-26 16:34:55 -0600 | [diff] [blame] | 375 | saddr->u.inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 376 | } |
| 377 | } |
| 378 | |
| 379 | return saddr; |
| 380 | } |
| 381 | |
| 382 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 383 | int main(int argc, char **argv) |
| 384 | { |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 385 | BlockBackend *blk; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 386 | BlockDriverState *bs; |
| 387 | off_t dev_offset = 0; |
Paolo Bonzini | b90fb4b | 2011-09-08 17:24:54 +0200 | [diff] [blame] | 388 | uint32_t nbdflags = 0; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 389 | bool disconnect = false; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 390 | const char *bindto = "0.0.0.0"; |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 391 | const char *port = NULL; |
| 392 | char *sockpath = NULL; |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 393 | char *device = NULL; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 394 | off_t fd_size; |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 395 | QemuOpts *sn_opts = NULL; |
| 396 | const char *sn_id_or_name = NULL; |
| 397 | const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:"; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 398 | struct option lopt[] = { |
Blue Swirl | 660f11b | 2009-07-31 21:16:51 +0000 | [diff] [blame] | 399 | { "help", 0, NULL, 'h' }, |
| 400 | { "version", 0, NULL, 'V' }, |
| 401 | { "bind", 1, NULL, 'b' }, |
| 402 | { "port", 1, NULL, 'p' }, |
| 403 | { "socket", 1, NULL, 'k' }, |
| 404 | { "offset", 1, NULL, 'o' }, |
| 405 | { "read-only", 0, NULL, 'r' }, |
| 406 | { "partition", 1, NULL, 'P' }, |
| 407 | { "connect", 1, NULL, 'c' }, |
| 408 | { "disconnect", 0, NULL, 'd' }, |
| 409 | { "snapshot", 0, NULL, 's' }, |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 410 | { "load-snapshot", 1, NULL, 'l' }, |
Blue Swirl | 660f11b | 2009-07-31 21:16:51 +0000 | [diff] [blame] | 411 | { "nocache", 0, NULL, 'n' }, |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 412 | { "cache", 1, NULL, QEMU_NBD_OPT_CACHE }, |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 413 | { "aio", 1, NULL, QEMU_NBD_OPT_AIO }, |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 414 | { "discard", 1, NULL, QEMU_NBD_OPT_DISCARD }, |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 415 | { "detect-zeroes", 1, NULL, QEMU_NBD_OPT_DETECT_ZEROES }, |
Blue Swirl | 660f11b | 2009-07-31 21:16:51 +0000 | [diff] [blame] | 416 | { "shared", 1, NULL, 'e' }, |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 417 | { "format", 1, NULL, 'f' }, |
Blue Swirl | 660f11b | 2009-07-31 21:16:51 +0000 | [diff] [blame] | 418 | { "persistent", 0, NULL, 't' }, |
| 419 | { "verbose", 0, NULL, 'v' }, |
| 420 | { NULL, 0, NULL, 0 } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 421 | }; |
| 422 | int ch; |
| 423 | int opt_ind = 0; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 424 | char *end; |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 425 | int flags = BDRV_O_RDWR; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 426 | int partition = -1; |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 427 | int ret = 0; |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 428 | int fd; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 429 | bool seen_cache = false; |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 430 | bool seen_discard = false; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 431 | bool seen_aio = false; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 432 | pthread_t client_thread; |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 433 | const char *fmt = NULL; |
Max Reitz | 34b5d2c | 2013-09-05 14:45:29 +0200 | [diff] [blame] | 434 | Error *local_err = NULL; |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 435 | BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 436 | QDict *options = NULL; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 437 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 438 | /* The client thread uses SIGTERM to interrupt the server. A signal |
| 439 | * handler ensures that "qemu-nbd -v -c" exits with a nice status code. |
| 440 | */ |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 441 | struct sigaction sa_sigterm; |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 442 | memset(&sa_sigterm, 0, sizeof(sa_sigterm)); |
| 443 | sa_sigterm.sa_handler = termsig_handler; |
| 444 | sigaction(SIGTERM, &sa_sigterm, NULL); |
Fam Zheng | 10f5bff | 2014-02-10 14:48:51 +0800 | [diff] [blame] | 445 | qemu_init_exec_dir(argv[0]); |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 446 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 447 | while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { |
| 448 | switch (ch) { |
| 449 | case 's': |
ths | 2f72648 | 2008-07-03 11:47:46 +0000 | [diff] [blame] | 450 | flags |= BDRV_O_SNAPSHOT; |
| 451 | break; |
| 452 | case 'n': |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 453 | optarg = (char *) "none"; |
| 454 | /* fallthrough */ |
| 455 | case QEMU_NBD_OPT_CACHE: |
| 456 | if (seen_cache) { |
| 457 | errx(EXIT_FAILURE, "-n and --cache can only be specified once"); |
| 458 | } |
| 459 | seen_cache = true; |
| 460 | if (bdrv_parse_cache_flags(optarg, &flags) == -1) { |
| 461 | errx(EXIT_FAILURE, "Invalid cache mode `%s'", optarg); |
| 462 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 463 | break; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 464 | case QEMU_NBD_OPT_AIO: |
| 465 | if (seen_aio) { |
| 466 | errx(EXIT_FAILURE, "--aio can only be specified once"); |
| 467 | } |
| 468 | seen_aio = true; |
| 469 | if (!strcmp(optarg, "native")) { |
| 470 | flags |= BDRV_O_NATIVE_AIO; |
| 471 | } else if (!strcmp(optarg, "threads")) { |
| 472 | /* this is the default */ |
| 473 | } else { |
| 474 | errx(EXIT_FAILURE, "invalid aio mode `%s'", optarg); |
| 475 | } |
| 476 | break; |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 477 | case QEMU_NBD_OPT_DISCARD: |
| 478 | if (seen_discard) { |
| 479 | errx(EXIT_FAILURE, "--discard can only be specified once"); |
| 480 | } |
| 481 | seen_discard = true; |
| 482 | if (bdrv_parse_discard_flags(optarg, &flags) == -1) { |
| 483 | errx(EXIT_FAILURE, "Invalid discard mode `%s'", optarg); |
| 484 | } |
| 485 | break; |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 486 | case QEMU_NBD_OPT_DETECT_ZEROES: |
| 487 | detect_zeroes = |
| 488 | qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, |
| 489 | optarg, |
Eric Blake | 7fb1cf1 | 2015-11-18 01:52:57 -0700 | [diff] [blame] | 490 | BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 491 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
| 492 | &local_err); |
| 493 | if (local_err) { |
| 494 | errx(EXIT_FAILURE, "Failed to parse detect_zeroes mode: %s", |
| 495 | error_get_pretty(local_err)); |
| 496 | } |
| 497 | if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && |
| 498 | !(flags & BDRV_O_UNMAP)) { |
| 499 | errx(EXIT_FAILURE, "setting detect-zeroes to unmap is not allowed " |
| 500 | "without setting discard operation to unmap"); |
| 501 | } |
| 502 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 503 | case 'b': |
| 504 | bindto = optarg; |
| 505 | break; |
| 506 | case 'p': |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 507 | port = optarg; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 508 | break; |
| 509 | case 'o': |
| 510 | dev_offset = strtoll (optarg, &end, 0); |
| 511 | if (*end) { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 512 | errx(EXIT_FAILURE, "Invalid offset `%s'", optarg); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 513 | } |
| 514 | if (dev_offset < 0) { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 515 | errx(EXIT_FAILURE, "Offset must be positive `%s'", optarg); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 516 | } |
| 517 | break; |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 518 | case 'l': |
| 519 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { |
Markus Armbruster | 70b9433 | 2015-02-13 12:50:26 +0100 | [diff] [blame] | 520 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, |
| 521 | optarg, false); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 522 | if (!sn_opts) { |
| 523 | errx(EXIT_FAILURE, "Failed in parsing snapshot param `%s'", |
| 524 | optarg); |
| 525 | } |
| 526 | } else { |
| 527 | sn_id_or_name = optarg; |
| 528 | } |
| 529 | /* fall through */ |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 530 | case 'r': |
Paolo Bonzini | b90fb4b | 2011-09-08 17:24:54 +0200 | [diff] [blame] | 531 | nbdflags |= NBD_FLAG_READ_ONLY; |
Naphtali Sprei | 07108b2 | 2010-03-14 15:19:57 +0200 | [diff] [blame] | 532 | flags &= ~BDRV_O_RDWR; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 533 | break; |
| 534 | case 'P': |
| 535 | partition = strtol(optarg, &end, 0); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 536 | if (*end) { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 537 | errx(EXIT_FAILURE, "Invalid partition `%s'", optarg); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 538 | } |
| 539 | if (partition < 1 || partition > 8) { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 540 | errx(EXIT_FAILURE, "Invalid partition %d", partition); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 541 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 542 | break; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 543 | case 'k': |
Paolo Bonzini | b32f6c2 | 2011-11-04 15:51:20 +0100 | [diff] [blame] | 544 | sockpath = optarg; |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 545 | if (sockpath[0] != '/') { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 546 | errx(EXIT_FAILURE, "socket path must be absolute\n"); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 547 | } |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 548 | break; |
| 549 | case 'd': |
| 550 | disconnect = true; |
| 551 | break; |
| 552 | case 'c': |
| 553 | device = optarg; |
| 554 | break; |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 555 | case 'e': |
| 556 | shared = strtol(optarg, &end, 0); |
| 557 | if (*end) { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 558 | errx(EXIT_FAILURE, "Invalid shared device number '%s'", optarg); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 559 | } |
| 560 | if (shared < 1) { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 561 | errx(EXIT_FAILURE, "Shared device number must be greater than 0\n"); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 562 | } |
| 563 | break; |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 564 | case 'f': |
| 565 | fmt = optarg; |
| 566 | break; |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 567 | case 't': |
| 568 | persistent = 1; |
| 569 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 570 | case 'v': |
| 571 | verbose = 1; |
| 572 | break; |
| 573 | case 'V': |
| 574 | version(argv[0]); |
| 575 | exit(0); |
| 576 | break; |
| 577 | case 'h': |
| 578 | usage(argv[0]); |
| 579 | exit(0); |
| 580 | break; |
| 581 | case '?': |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 582 | errx(EXIT_FAILURE, "Try `%s --help' for more information.", |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 583 | argv[0]); |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | if ((argc - optind) != 1) { |
Ryota Ozaki | b6353be | 2010-03-20 15:23:23 +0900 | [diff] [blame] | 588 | errx(EXIT_FAILURE, "Invalid number of argument.\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 589 | "Try `%s --help' for more information.", |
| 590 | argv[0]); |
| 591 | } |
| 592 | |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 593 | if (disconnect) { |
| 594 | fd = open(argv[optind], O_RDWR); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 595 | if (fd < 0) { |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 596 | err(EXIT_FAILURE, "Cannot open %s", argv[optind]); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 597 | } |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 598 | nbd_disconnect(fd); |
| 599 | |
| 600 | close(fd); |
| 601 | |
| 602 | printf("%s disconnected\n", argv[optind]); |
| 603 | |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 604 | return 0; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 605 | } |
| 606 | |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 607 | if (device && !verbose) { |
| 608 | int stderr_fd[2]; |
| 609 | pid_t pid; |
| 610 | int ret; |
| 611 | |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 612 | if (qemu_pipe(stderr_fd) < 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 613 | err(EXIT_FAILURE, "Error setting up communication pipe"); |
| 614 | } |
| 615 | |
| 616 | /* Now daemonize, but keep a communication channel open to |
| 617 | * print errors and exit with the proper status code. |
| 618 | */ |
| 619 | pid = fork(); |
Max Reitz | 70d4739 | 2015-02-25 13:08:22 -0500 | [diff] [blame] | 620 | if (pid < 0) { |
| 621 | err(EXIT_FAILURE, "Failed to fork"); |
| 622 | } else if (pid == 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 623 | close(stderr_fd[0]); |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 624 | ret = qemu_daemon(1, 0); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 625 | |
| 626 | /* Temporarily redirect stderr to the parent's pipe... */ |
| 627 | dup2(stderr_fd[1], STDERR_FILENO); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 628 | if (ret < 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 629 | err(EXIT_FAILURE, "Failed to daemonize"); |
| 630 | } |
| 631 | |
| 632 | /* ... close the descriptor we inherited and go on. */ |
| 633 | close(stderr_fd[1]); |
| 634 | } else { |
| 635 | bool errors = false; |
| 636 | char *buf; |
| 637 | |
| 638 | /* In the parent. Print error messages from the child until |
| 639 | * it closes the pipe. |
| 640 | */ |
| 641 | close(stderr_fd[1]); |
| 642 | buf = g_malloc(1024); |
| 643 | while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { |
| 644 | errors = true; |
| 645 | ret = qemu_write_full(STDERR_FILENO, buf, ret); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 646 | if (ret < 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 647 | exit(EXIT_FAILURE); |
| 648 | } |
| 649 | } |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 650 | if (ret < 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 651 | err(EXIT_FAILURE, "Cannot read from daemon"); |
| 652 | } |
| 653 | |
| 654 | /* Usually the daemon should not print any message. |
| 655 | * Exit with zero status in that case. |
| 656 | */ |
| 657 | exit(errors); |
| 658 | } |
| 659 | } |
| 660 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 661 | if (device != NULL && sockpath == NULL) { |
| 662 | sockpath = g_malloc(128); |
| 663 | snprintf(sockpath, 128, SOCKET_PATH, basename(device)); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 664 | } |
| 665 | |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 666 | saddr = nbd_build_socket_address(sockpath, bindto, port); |
| 667 | |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 668 | if (qemu_init_main_loop(&local_err)) { |
Markus Armbruster | 565f65d | 2015-02-12 13:55:05 +0100 | [diff] [blame] | 669 | error_report_err(local_err); |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 670 | exit(EXIT_FAILURE); |
| 671 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 672 | bdrv_init(); |
| 673 | atexit(bdrv_close_all); |
| 674 | |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 675 | if (fmt) { |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 676 | options = qdict_new(); |
| 677 | qdict_put(options, "driver", qstring_from_str(fmt)); |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 678 | } |
| 679 | |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 680 | srcpath = argv[optind]; |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 681 | blk = blk_new_open("hda", srcpath, NULL, options, flags, &local_err); |
| 682 | if (!blk) { |
| 683 | errx(EXIT_FAILURE, "Failed to blk_new_open '%s': %s", argv[optind], |
| 684 | error_get_pretty(local_err)); |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 685 | } |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 686 | bs = blk_bs(blk); |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 687 | |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 688 | if (sn_opts) { |
| 689 | ret = bdrv_snapshot_load_tmp(bs, |
| 690 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), |
| 691 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), |
| 692 | &local_err); |
| 693 | } else if (sn_id_or_name) { |
| 694 | ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, |
| 695 | &local_err); |
| 696 | } |
| 697 | if (ret < 0) { |
| 698 | errno = -ret; |
| 699 | err(EXIT_FAILURE, |
| 700 | "Failed to load snapshot: %s", |
| 701 | error_get_pretty(local_err)); |
| 702 | } |
| 703 | |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 704 | bs->detect_zeroes = detect_zeroes; |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 705 | fd_size = blk_getlength(blk); |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 706 | if (fd_size < 0) { |
| 707 | errx(EXIT_FAILURE, "Failed to determine the image length: %s", |
| 708 | strerror(-fd_size)); |
| 709 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 710 | |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 711 | if (partition != -1) { |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 712 | ret = find_partition(blk, partition, &dev_offset, &fd_size); |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 713 | if (ret < 0) { |
| 714 | errno = -ret; |
| 715 | err(EXIT_FAILURE, "Could not find partition %d", partition); |
| 716 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 717 | } |
| 718 | |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 719 | exp = nbd_export_new(blk, dev_offset, fd_size, nbdflags, nbd_export_closed, |
| 720 | &local_err); |
| 721 | if (!exp) { |
| 722 | errx(EXIT_FAILURE, "%s", error_get_pretty(local_err)); |
| 723 | } |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 724 | |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 725 | fd = socket_listen(saddr, &local_err); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 726 | if (fd < 0) { |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 727 | error_report_err(local_err); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 728 | return 1; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 729 | } |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 730 | |
| 731 | if (device) { |
| 732 | int ret; |
| 733 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 734 | ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 735 | if (ret != 0) { |
| 736 | errx(EXIT_FAILURE, "Failed to create client thread: %s", |
| 737 | strerror(ret)); |
| 738 | } |
| 739 | } else { |
| 740 | /* Shut up GCC warnings. */ |
| 741 | memset(&client_thread, 0, sizeof(client_thread)); |
| 742 | } |
| 743 | |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 744 | server_fd = fd; |
| 745 | nbd_update_server_fd_handler(fd); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 746 | |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 747 | /* now when the initialization is (almost) complete, chdir("/") |
| 748 | * to free any busy filesystems */ |
| 749 | if (chdir("/") < 0) { |
| 750 | err(EXIT_FAILURE, "Could not chdir to root directory"); |
| 751 | } |
| 752 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 753 | state = RUNNING; |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 754 | do { |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 755 | main_loop_wait(false); |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 756 | if (state == TERMINATE) { |
| 757 | state = TERMINATING; |
| 758 | nbd_export_close(exp); |
| 759 | nbd_export_put(exp); |
| 760 | exp = NULL; |
| 761 | } |
| 762 | } while (state != TERMINATED); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 763 | |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 764 | blk_unref(blk); |
Paolo Bonzini | b32f6c2 | 2011-11-04 15:51:20 +0100 | [diff] [blame] | 765 | if (sockpath) { |
| 766 | unlink(sockpath); |
| 767 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 768 | |
Markus Armbruster | fbf28a4 | 2014-09-29 16:07:55 +0200 | [diff] [blame] | 769 | qemu_opts_del(sn_opts); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 770 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 771 | if (device) { |
| 772 | void *ret; |
| 773 | pthread_join(client_thread, &ret); |
| 774 | exit(ret != NULL); |
| 775 | } else { |
| 776 | exit(EXIT_SUCCESS); |
| 777 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 778 | } |