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 | |
Peter Maydell | d38ea87 | 2016-01-29 17:50:05 +0000 | [diff] [blame] | 19 | #include "qemu/osdep.h" |
Eric Blake | c2a3d7d | 2017-07-21 08:50:47 -0500 | [diff] [blame] | 20 | #include <getopt.h> |
| 21 | #include <libgen.h> |
| 22 | #include <pthread.h> |
| 23 | |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 24 | #include "qapi/error.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 25 | #include "qemu/cutils.h" |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 26 | #include "sysemu/block-backend.h" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 27 | #include "block/block_int.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 28 | #include "block/nbd.h" |
Alex Bligh | 6a1751b | 2013-08-21 16:02:47 +0100 | [diff] [blame] | 29 | #include "qemu/main-loop.h" |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 30 | #include "qemu/option.h" |
Paolo Bonzini | 537b41f | 2014-02-17 14:43:51 +0100 | [diff] [blame] | 31 | #include "qemu/error-report.h" |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 32 | #include "qemu/config-file.h" |
Paolo Bonzini | 58369e2 | 2016-03-15 17:22:36 +0100 | [diff] [blame] | 33 | #include "qemu/bswap.h" |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 34 | #include "qemu/log.h" |
Paolo Bonzini | 53fabd4 | 2017-03-16 16:29:45 +0100 | [diff] [blame] | 35 | #include "qemu/systemd.h" |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 36 | #include "block/snapshot.h" |
Markus Armbruster | 452fcdb | 2018-02-01 12:18:39 +0100 | [diff] [blame] | 37 | #include "qapi/qmp/qdict.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 38 | #include "qapi/qmp/qstring.h" |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 39 | #include "qom/object_interfaces.h" |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 40 | #include "io/channel-socket.h" |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 41 | #include "io/net-listener.h" |
Daniel P. Berrange | c229708 | 2016-04-06 12:12:06 +0100 | [diff] [blame] | 42 | #include "crypto/init.h" |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 43 | #include "trace/control.h" |
Eric Blake | be37713 | 2017-07-21 08:50:46 -0500 | [diff] [blame] | 44 | #include "qemu-version.h" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 45 | |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 46 | #define SOCKET_PATH "/var/lock/qemu-nbd-%s" |
Daniel P. Berrange | fa8b7ce | 2016-02-17 10:10:21 +0000 | [diff] [blame] | 47 | #define QEMU_NBD_OPT_CACHE 256 |
| 48 | #define QEMU_NBD_OPT_AIO 257 |
| 49 | #define QEMU_NBD_OPT_DISCARD 258 |
| 50 | #define QEMU_NBD_OPT_DETECT_ZEROES 259 |
| 51 | #define QEMU_NBD_OPT_OBJECT 260 |
| 52 | #define QEMU_NBD_OPT_TLSCREDS 261 |
| 53 | #define QEMU_NBD_OPT_IMAGE_OPTS 262 |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 54 | #define QEMU_NBD_OPT_FORK 263 |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 55 | |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 56 | #define MBR_SIZE 512 |
| 57 | |
Paolo Bonzini | af49bbb | 2011-09-19 14:03:37 +0200 | [diff] [blame] | 58 | static NBDExport *exp; |
blueswir1 | b1d8e52 | 2008-10-26 13:43:07 +0000 | [diff] [blame] | 59 | static int verbose; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 60 | static char *srcpath; |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 61 | static SocketAddress *saddr; |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 62 | static int persistent = 0; |
| 63 | static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 64 | static int shared = 1; |
| 65 | static int nb_fds; |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 66 | static QIONetListener *server; |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 67 | static QCryptoTLSCreds *tlscreds; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 68 | |
| 69 | static void usage(const char *name) |
| 70 | { |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 71 | (printf) ( |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 72 | "Usage: %s [OPTIONS] FILE\n" |
| 73 | "QEMU Disk Network Block Device Server\n" |
| 74 | "\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 75 | " -h, --help display this help and exit\n" |
| 76 | " -V, --version output version information and exit\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 77 | "\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 78 | "Connection properties:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 79 | " -p, --port=PORT port to listen on (default `%d')\n" |
| 80 | " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" |
| 81 | " -k, --socket=PATH path to the unix socket\n" |
| 82 | " (default '"SOCKET_PATH"')\n" |
| 83 | " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" |
| 84 | " -t, --persistent don't exit on the last connection\n" |
| 85 | " -v, --verbose display extra debugging information\n" |
Vladimir Sementsov-Ogievskiy | f5cd0bb | 2018-10-03 20:02:27 +0300 | [diff] [blame] | 86 | " -x, --export-name=NAME expose export by name (default is empty string)\n" |
| 87 | " -D, --description=TEXT export a human-readable description\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 88 | "\n" |
| 89 | "Exposing part of the image:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 90 | " -o, --offset=OFFSET offset into the image\n" |
| 91 | " -P, --partition=NUM only expose partition NUM\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 92 | "\n" |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 93 | "General purpose options:\n" |
| 94 | " --object type,id=ID,... define an object such as 'secret' for providing\n" |
| 95 | " passwords and/or encryption keys\n" |
Eric Blake | f7812df | 2018-10-03 13:04:26 -0500 | [diff] [blame] | 96 | " --tls-creds=ID use id of an earlier --object to provide TLS\n" |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 97 | " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
| 98 | " specify tracing options\n" |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 99 | " --fork fork off the server process and exit the parent\n" |
| 100 | " once the server is running\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 101 | #ifdef __linux__ |
| 102 | "Kernel NBD client support:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 103 | " -c, --connect=DEV connect FILE to the local NBD device DEV\n" |
| 104 | " -d, --disconnect disconnect the specified device\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 105 | "\n" |
| 106 | #endif |
| 107 | "\n" |
| 108 | "Block device options:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 109 | " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" |
| 110 | " -r, --read-only export read-only\n" |
| 111 | " -s, --snapshot use FILE as an external snapshot, create a temporary\n" |
| 112 | " file with backing_file=FILE, redirect the write to\n" |
| 113 | " the temporary one\n" |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 114 | " -l, --load-snapshot=SNAPSHOT_PARAM\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 115 | " load an internal snapshot inside FILE and export it\n" |
| 116 | " as an read-only device, SNAPSHOT_PARAM format is\n" |
| 117 | " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" |
| 118 | " '[ID_OR_NAME]'\n" |
| 119 | " -n, --nocache disable host cache\n" |
| 120 | " --cache=MODE set cache mode (none, writeback, ...)\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 121 | " --aio=MODE set AIO mode (native or threads)\n" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 122 | " --discard=MODE set discard mode (ignore, unmap)\n" |
Andrey Korolyov | 6883de6 | 2015-07-31 22:12:54 +0300 | [diff] [blame] | 123 | " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 124 | " --image-opts treat FILE as a full set of image options\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 125 | "\n" |
Eric Blake | f5048cb | 2017-08-03 11:33:53 -0500 | [diff] [blame] | 126 | QEMU_HELP_BOTTOM "\n" |
Laurent Vivier | c2e2872 | 2010-09-17 20:37:25 +0200 | [diff] [blame] | 127 | , name, NBD_DEFAULT_PORT, "DEVICE"); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | static void version(const char *name) |
| 131 | { |
| 132 | printf( |
Thomas Huth | 7e563bf | 2018-02-15 12:06:47 +0100 | [diff] [blame] | 133 | "%s " QEMU_FULL_VERSION "\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 134 | "Written by Anthony Liguori.\n" |
| 135 | "\n" |
Eric Blake | be37713 | 2017-07-21 08:50:46 -0500 | [diff] [blame] | 136 | QEMU_COPYRIGHT "\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 137 | "This is free software; see the source for copying conditions. There is NO\n" |
| 138 | "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" |
ths | 315bc7a | 2008-07-18 18:06:23 +0000 | [diff] [blame] | 139 | , name); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | struct partition_record |
| 143 | { |
| 144 | uint8_t bootable; |
| 145 | uint8_t start_head; |
| 146 | uint32_t start_cylinder; |
| 147 | uint8_t start_sector; |
| 148 | uint8_t system; |
| 149 | uint8_t end_head; |
| 150 | uint8_t end_cylinder; |
| 151 | uint8_t end_sector; |
| 152 | uint32_t start_sector_abs; |
| 153 | uint32_t nb_sectors_abs; |
| 154 | }; |
| 155 | |
| 156 | static void read_partition(uint8_t *p, struct partition_record *r) |
| 157 | { |
| 158 | r->bootable = p[0]; |
| 159 | r->start_head = p[1]; |
| 160 | r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); |
| 161 | r->start_sector = p[2] & 0x3f; |
| 162 | r->system = p[4]; |
| 163 | r->end_head = p[5]; |
| 164 | r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); |
| 165 | r->end_sector = p[6] & 0x3f; |
Max Reitz | ac97393 | 2015-02-25 13:08:23 -0500 | [diff] [blame] | 166 | |
Peter Maydell | 773dce3 | 2016-06-10 16:00:36 +0100 | [diff] [blame] | 167 | r->start_sector_abs = ldl_le_p(p + 8); |
| 168 | r->nb_sectors_abs = ldl_le_p(p + 12); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 169 | } |
| 170 | |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 171 | static int find_partition(BlockBackend *blk, int partition, |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 172 | off_t *offset, off_t *size) |
| 173 | { |
| 174 | struct partition_record mbr[4]; |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 175 | uint8_t data[MBR_SIZE]; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 176 | int i; |
| 177 | int ext_partnum = 4; |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 178 | int ret; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 179 | |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 180 | ret = blk_pread(blk, 0, data, sizeof(data)); |
| 181 | if (ret < 0) { |
Markus Armbruster | a4699e5 | 2015-12-18 16:35:10 +0100 | [diff] [blame] | 182 | error_report("error while reading: %s", strerror(-ret)); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 183 | exit(EXIT_FAILURE); |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 184 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 185 | |
| 186 | if (data[510] != 0x55 || data[511] != 0xaa) { |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 187 | return -EINVAL; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | for (i = 0; i < 4; i++) { |
| 191 | read_partition(&data[446 + 16 * i], &mbr[i]); |
| 192 | |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 193 | if (!mbr[i].system || !mbr[i].nb_sectors_abs) { |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 194 | continue; |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 195 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 196 | |
| 197 | if (mbr[i].system == 0xF || mbr[i].system == 0x5) { |
| 198 | struct partition_record ext[4]; |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 199 | uint8_t data1[MBR_SIZE]; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 200 | int j; |
| 201 | |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 202 | ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, |
| 203 | data1, sizeof(data1)); |
| 204 | if (ret < 0) { |
Markus Armbruster | a4699e5 | 2015-12-18 16:35:10 +0100 | [diff] [blame] | 205 | error_report("error while reading: %s", strerror(-ret)); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 206 | exit(EXIT_FAILURE); |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 207 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 208 | |
| 209 | for (j = 0; j < 4; j++) { |
| 210 | read_partition(&data1[446 + 16 * j], &ext[j]); |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 211 | if (!ext[j].system || !ext[j].nb_sectors_abs) { |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 212 | continue; |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 213 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 214 | |
| 215 | if ((ext_partnum + j + 1) == partition) { |
| 216 | *offset = (uint64_t)ext[j].start_sector_abs << 9; |
| 217 | *size = (uint64_t)ext[j].nb_sectors_abs << 9; |
| 218 | return 0; |
| 219 | } |
| 220 | } |
| 221 | ext_partnum += 4; |
| 222 | } else if ((i + 1) == partition) { |
| 223 | *offset = (uint64_t)mbr[i].start_sector_abs << 9; |
| 224 | *size = (uint64_t)mbr[i].nb_sectors_abs << 9; |
| 225 | return 0; |
| 226 | } |
| 227 | } |
| 228 | |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 229 | return -ENOENT; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 230 | } |
| 231 | |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 232 | static void termsig_handler(int signum) |
| 233 | { |
Pavel Butsykin | 23994a5 | 2016-04-14 13:20:15 +0300 | [diff] [blame] | 234 | atomic_cmpxchg(&state, RUNNING, TERMINATE); |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 235 | qemu_notify_event(); |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 236 | } |
| 237 | |
Paolo Bonzini | 537b41f | 2014-02-17 14:43:51 +0100 | [diff] [blame] | 238 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 239 | static void *show_parts(void *arg) |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 240 | { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 241 | char *device = arg; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 242 | int nbd; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 243 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 244 | /* linux just needs an open() to trigger |
| 245 | * the partition table update |
| 246 | * but remember to load the module with max_part != 0 : |
| 247 | * modprobe nbd max_part=63 |
| 248 | */ |
| 249 | nbd = open(device, O_RDWR); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 250 | if (nbd >= 0) { |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 251 | close(nbd); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 252 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 253 | return NULL; |
| 254 | } |
| 255 | |
| 256 | static void *nbd_client_thread(void *arg) |
| 257 | { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 258 | char *device = arg; |
Eric Blake | 081dd1f | 2017-07-07 15:30:49 -0500 | [diff] [blame] | 259 | NBDExportInfo info = { .request_sizes = false, }; |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 260 | QIOChannelSocket *sioc; |
| 261 | int fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 262 | int ret; |
| 263 | pthread_t show_parts_thread; |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 264 | Error *local_error = NULL; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 265 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 266 | sioc = qio_channel_socket_new(); |
| 267 | if (qio_channel_socket_connect_sync(sioc, |
| 268 | saddr, |
| 269 | &local_error) < 0) { |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 270 | error_report_err(local_error); |
Stefan Hajnoczi | dc10e8b | 2012-01-05 13:16:07 +0000 | [diff] [blame] | 271 | goto out; |
| 272 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 273 | |
Eric Blake | 004a89f | 2017-07-07 15:30:41 -0500 | [diff] [blame] | 274 | ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, |
| 275 | NULL, NULL, NULL, &info, &local_error); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 276 | if (ret < 0) { |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 277 | if (local_error) { |
Markus Armbruster | 7828867 | 2015-12-18 16:35:07 +0100 | [diff] [blame] | 278 | error_report_err(local_error); |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 279 | } |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 280 | goto out_socket; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 281 | } |
| 282 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 283 | fd = open(device, O_RDWR); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 284 | if (fd < 0) { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 285 | /* Linux-only, we can use %m in printf. */ |
Markus Armbruster | b988468 | 2015-12-18 16:35:18 +0100 | [diff] [blame] | 286 | error_report("Failed to open %s: %m", device); |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 287 | goto out_socket; |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 288 | } |
| 289 | |
Eric Blake | 004a89f | 2017-07-07 15:30:41 -0500 | [diff] [blame] | 290 | ret = nbd_init(fd, sioc, &info, &local_error); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 291 | if (ret < 0) { |
Vladimir Sementsov-Ogievskiy | be41c10 | 2017-05-26 14:09:13 +0300 | [diff] [blame] | 292 | error_report_err(local_error); |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 293 | goto out_fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | /* update partition table */ |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 297 | pthread_create(&show_parts_thread, NULL, show_parts, device); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 298 | |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 299 | if (verbose) { |
| 300 | fprintf(stderr, "NBD device %s is now connected to %s\n", |
| 301 | device, srcpath); |
| 302 | } else { |
| 303 | /* Close stderr so that the qemu-nbd process exits. */ |
| 304 | dup2(STDOUT_FILENO, STDERR_FILENO); |
| 305 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 306 | |
| 307 | ret = nbd_client(fd); |
| 308 | if (ret) { |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 309 | goto out_fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 310 | } |
| 311 | close(fd); |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 312 | object_unref(OBJECT(sioc)); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 313 | kill(getpid(), SIGTERM); |
| 314 | return (void *) EXIT_SUCCESS; |
| 315 | |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 316 | out_fd: |
| 317 | close(fd); |
| 318 | out_socket: |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 319 | object_unref(OBJECT(sioc)); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 320 | out: |
| 321 | kill(getpid(), SIGTERM); |
| 322 | return (void *) EXIT_FAILURE; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 323 | } |
| 324 | |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 325 | static int nbd_can_accept(void) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 326 | { |
Eric Blake | df8ad9f | 2017-05-26 22:04:21 -0500 | [diff] [blame] | 327 | return state == RUNNING && nb_fds < shared; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 328 | } |
| 329 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 330 | static void nbd_export_closed(NBDExport *exp) |
| 331 | { |
| 332 | assert(state == TERMINATING); |
| 333 | state = TERMINATED; |
| 334 | } |
| 335 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 336 | static void nbd_update_server_watch(void); |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 337 | |
Eric Blake | 0c9390d | 2017-06-08 17:26:17 -0500 | [diff] [blame] | 338 | static void nbd_client_closed(NBDClient *client, bool negotiated) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 339 | { |
Paolo Bonzini | 1743b51 | 2011-09-19 14:33:23 +0200 | [diff] [blame] | 340 | nb_fds--; |
Eric Blake | 0c9390d | 2017-06-08 17:26:17 -0500 | [diff] [blame] | 341 | if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) { |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 342 | state = TERMINATE; |
| 343 | } |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 344 | nbd_update_server_watch(); |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 345 | nbd_client_put(client); |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 346 | } |
| 347 | |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 348 | static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, |
| 349 | gpointer opaque) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 350 | { |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 351 | if (state >= TERMINATE) { |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 352 | return; |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 353 | } |
| 354 | |
Fam Zheng | ee7d7aa | 2016-01-14 16:41:01 +0800 | [diff] [blame] | 355 | nb_fds++; |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 356 | nbd_update_server_watch(); |
Vladimir Sementsov-Ogievskiy | 7f7dfe2 | 2018-10-03 20:02:28 +0300 | [diff] [blame] | 357 | nbd_client_new(cioc, tlscreds, NULL, nbd_client_closed); |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 358 | } |
| 359 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 360 | static void nbd_update_server_watch(void) |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 361 | { |
| 362 | if (nbd_can_accept()) { |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 363 | qio_net_listener_set_client_func(server, nbd_accept, NULL, NULL); |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 364 | } else { |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 365 | qio_net_listener_set_client_func(server, NULL, NULL, NULL); |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 366 | } |
| 367 | } |
| 368 | |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 369 | |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 370 | static SocketAddress *nbd_build_socket_address(const char *sockpath, |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 371 | const char *bindto, |
| 372 | const char *port) |
| 373 | { |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 374 | SocketAddress *saddr; |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 375 | |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 376 | saddr = g_new0(SocketAddress, 1); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 377 | if (sockpath) { |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 378 | saddr->type = SOCKET_ADDRESS_TYPE_UNIX; |
| 379 | saddr->u.q_unix.path = g_strdup(sockpath); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 380 | } else { |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 381 | InetSocketAddress *inet; |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 382 | saddr->type = SOCKET_ADDRESS_TYPE_INET; |
| 383 | inet = &saddr->u.inet; |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 384 | inet->host = g_strdup(bindto); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 385 | if (port) { |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 386 | inet->port = g_strdup(port); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 387 | } else { |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 388 | inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 389 | } |
| 390 | } |
| 391 | |
| 392 | return saddr; |
| 393 | } |
| 394 | |
| 395 | |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 396 | static QemuOptsList file_opts = { |
| 397 | .name = "file", |
| 398 | .implied_opt_name = "file", |
| 399 | .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), |
| 400 | .desc = { |
| 401 | /* no elements => accept any params */ |
| 402 | { /* end of list */ } |
| 403 | }, |
| 404 | }; |
| 405 | |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 406 | static QemuOptsList qemu_object_opts = { |
| 407 | .name = "object", |
| 408 | .implied_opt_name = "qom-type", |
| 409 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), |
| 410 | .desc = { |
| 411 | { } |
| 412 | }, |
| 413 | }; |
| 414 | |
| 415 | |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 416 | |
| 417 | static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) |
| 418 | { |
| 419 | Object *obj; |
| 420 | QCryptoTLSCreds *creds; |
| 421 | |
| 422 | obj = object_resolve_path_component( |
| 423 | object_get_objects_root(), id); |
| 424 | if (!obj) { |
| 425 | error_setg(errp, "No TLS credentials with id '%s'", |
| 426 | id); |
| 427 | return NULL; |
| 428 | } |
| 429 | creds = (QCryptoTLSCreds *) |
| 430 | object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); |
| 431 | if (!creds) { |
| 432 | error_setg(errp, "Object with id '%s' is not TLS credentials", |
| 433 | id); |
| 434 | return NULL; |
| 435 | } |
| 436 | |
| 437 | if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { |
| 438 | error_setg(errp, |
| 439 | "Expecting TLS credentials with a server endpoint"); |
| 440 | return NULL; |
| 441 | } |
| 442 | object_ref(obj); |
| 443 | return creds; |
| 444 | } |
| 445 | |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 446 | static void setup_address_and_port(const char **address, const char **port) |
| 447 | { |
| 448 | if (*address == NULL) { |
| 449 | *address = "0.0.0.0"; |
| 450 | } |
| 451 | |
| 452 | if (*port == NULL) { |
| 453 | *port = stringify(NBD_DEFAULT_PORT); |
| 454 | } |
| 455 | } |
| 456 | |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 457 | /* |
| 458 | * Check socket parameters compatibility when socket activation is used. |
| 459 | */ |
| 460 | static const char *socket_activation_validate_opts(const char *device, |
| 461 | const char *sockpath, |
| 462 | const char *address, |
| 463 | const char *port) |
| 464 | { |
| 465 | if (device != NULL) { |
| 466 | return "NBD device can't be set when using socket activation"; |
| 467 | } |
| 468 | |
| 469 | if (sockpath != NULL) { |
| 470 | return "Unix socket can't be set when using socket activation"; |
| 471 | } |
| 472 | |
| 473 | if (address != NULL) { |
| 474 | return "The interface can't be set when using socket activation"; |
| 475 | } |
| 476 | |
| 477 | if (port != NULL) { |
| 478 | return "TCP port number can't be set when using socket activation"; |
| 479 | } |
| 480 | |
| 481 | return NULL; |
| 482 | } |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 483 | |
Kevin Wolf | b3b5299 | 2018-05-16 13:46:37 +0200 | [diff] [blame] | 484 | static void qemu_nbd_shutdown(void) |
| 485 | { |
| 486 | job_cancel_sync_all(); |
| 487 | bdrv_close_all(); |
| 488 | } |
| 489 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 490 | int main(int argc, char **argv) |
| 491 | { |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 492 | BlockBackend *blk; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 493 | BlockDriverState *bs; |
| 494 | off_t dev_offset = 0; |
Eric Blake | 7423f41 | 2016-07-21 13:34:46 -0600 | [diff] [blame] | 495 | uint16_t nbdflags = 0; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 496 | bool disconnect = false; |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 497 | const char *bindto = NULL; |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 498 | const char *port = NULL; |
| 499 | char *sockpath = NULL; |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 500 | char *device = NULL; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 501 | off_t fd_size; |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 502 | QemuOpts *sn_opts = NULL; |
| 503 | const char *sn_id_or_name = NULL; |
Eric Blake | b1a75b3 | 2016-10-14 13:33:03 -0500 | [diff] [blame] | 504 | const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:D:"; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 505 | struct option lopt[] = { |
Daniel P. Berrange | aa6e546 | 2016-02-17 10:10:22 +0000 | [diff] [blame] | 506 | { "help", no_argument, NULL, 'h' }, |
| 507 | { "version", no_argument, NULL, 'V' }, |
| 508 | { "bind", required_argument, NULL, 'b' }, |
| 509 | { "port", required_argument, NULL, 'p' }, |
| 510 | { "socket", required_argument, NULL, 'k' }, |
| 511 | { "offset", required_argument, NULL, 'o' }, |
| 512 | { "read-only", no_argument, NULL, 'r' }, |
| 513 | { "partition", required_argument, NULL, 'P' }, |
| 514 | { "connect", required_argument, NULL, 'c' }, |
| 515 | { "disconnect", no_argument, NULL, 'd' }, |
| 516 | { "snapshot", no_argument, NULL, 's' }, |
| 517 | { "load-snapshot", required_argument, NULL, 'l' }, |
| 518 | { "nocache", no_argument, NULL, 'n' }, |
| 519 | { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, |
| 520 | { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, |
| 521 | { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, |
| 522 | { "detect-zeroes", required_argument, NULL, |
| 523 | QEMU_NBD_OPT_DETECT_ZEROES }, |
| 524 | { "shared", required_argument, NULL, 'e' }, |
| 525 | { "format", required_argument, NULL, 'f' }, |
| 526 | { "persistent", no_argument, NULL, 't' }, |
| 527 | { "verbose", no_argument, NULL, 'v' }, |
| 528 | { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, |
| 529 | { "export-name", required_argument, NULL, 'x' }, |
Eric Blake | b1a75b3 | 2016-10-14 13:33:03 -0500 | [diff] [blame] | 530 | { "description", required_argument, NULL, 'D' }, |
Daniel P. Berrange | aa6e546 | 2016-02-17 10:10:22 +0000 | [diff] [blame] | 531 | { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, |
| 532 | { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 533 | { "trace", required_argument, NULL, 'T' }, |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 534 | { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, |
Blue Swirl | 660f11b | 2009-07-31 21:16:51 +0000 | [diff] [blame] | 535 | { NULL, 0, NULL, 0 } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 536 | }; |
| 537 | int ch; |
| 538 | int opt_ind = 0; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 539 | char *end; |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 540 | int flags = BDRV_O_RDWR; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 541 | int partition = -1; |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 542 | int ret = 0; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 543 | bool seen_cache = false; |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 544 | bool seen_discard = false; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 545 | bool seen_aio = false; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 546 | pthread_t client_thread; |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 547 | const char *fmt = NULL; |
Max Reitz | 34b5d2c | 2013-09-05 14:45:29 +0200 | [diff] [blame] | 548 | Error *local_err = NULL; |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 549 | BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 550 | QDict *options = NULL; |
Vladimir Sementsov-Ogievskiy | f5cd0bb | 2018-10-03 20:02:27 +0300 | [diff] [blame] | 551 | const char *export_name = ""; /* Default export name */ |
Eric Blake | b1a75b3 | 2016-10-14 13:33:03 -0500 | [diff] [blame] | 552 | const char *export_description = NULL; |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 553 | const char *tlscredsid = NULL; |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 554 | bool imageOpts = false; |
Kevin Wolf | 6effd5b | 2016-03-14 11:43:28 +0100 | [diff] [blame] | 555 | bool writethrough = true; |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 556 | char *trace_file = NULL; |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 557 | bool fork_process = false; |
| 558 | int old_stderr = -1; |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 559 | unsigned socket_activation; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 560 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 561 | /* The client thread uses SIGTERM to interrupt the server. A signal |
| 562 | * handler ensures that "qemu-nbd -v -c" exits with a nice status code. |
| 563 | */ |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 564 | struct sigaction sa_sigterm; |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 565 | memset(&sa_sigterm, 0, sizeof(sa_sigterm)); |
| 566 | sa_sigterm.sa_handler = termsig_handler; |
| 567 | sigaction(SIGTERM, &sa_sigterm, NULL); |
Daniel P. Berrange | c229708 | 2016-04-06 12:12:06 +0100 | [diff] [blame] | 568 | |
Max Reitz | 041e32b | 2017-06-11 14:37:14 +0200 | [diff] [blame] | 569 | #ifdef CONFIG_POSIX |
| 570 | signal(SIGPIPE, SIG_IGN); |
| 571 | #endif |
| 572 | |
Daniel P. Berrange | fe4db84 | 2016-10-04 14:35:52 +0100 | [diff] [blame] | 573 | module_call_init(MODULE_INIT_TRACE); |
Eduardo Habkost | e8f2d27 | 2016-05-12 11:10:04 -0300 | [diff] [blame] | 574 | qcrypto_init(&error_fatal); |
Daniel P. Berrange | c229708 | 2016-04-06 12:12:06 +0100 | [diff] [blame] | 575 | |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 576 | module_call_init(MODULE_INIT_QOM); |
| 577 | qemu_add_opts(&qemu_object_opts); |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 578 | qemu_add_opts(&qemu_trace_opts); |
Fam Zheng | 10f5bff | 2014-02-10 14:48:51 +0800 | [diff] [blame] | 579 | qemu_init_exec_dir(argv[0]); |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 580 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 581 | while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { |
| 582 | switch (ch) { |
| 583 | case 's': |
ths | 2f72648 | 2008-07-03 11:47:46 +0000 | [diff] [blame] | 584 | flags |= BDRV_O_SNAPSHOT; |
| 585 | break; |
| 586 | case 'n': |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 587 | optarg = (char *) "none"; |
| 588 | /* fallthrough */ |
| 589 | case QEMU_NBD_OPT_CACHE: |
| 590 | if (seen_cache) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 591 | error_report("-n and --cache can only be specified once"); |
| 592 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 593 | } |
| 594 | seen_cache = true; |
Kevin Wolf | 6effd5b | 2016-03-14 11:43:28 +0100 | [diff] [blame] | 595 | if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 596 | error_report("Invalid cache mode `%s'", optarg); |
| 597 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 598 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 599 | break; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 600 | case QEMU_NBD_OPT_AIO: |
| 601 | if (seen_aio) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 602 | error_report("--aio can only be specified once"); |
| 603 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 604 | } |
| 605 | seen_aio = true; |
| 606 | if (!strcmp(optarg, "native")) { |
| 607 | flags |= BDRV_O_NATIVE_AIO; |
| 608 | } else if (!strcmp(optarg, "threads")) { |
| 609 | /* this is the default */ |
| 610 | } else { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 611 | error_report("invalid aio mode `%s'", optarg); |
| 612 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 613 | } |
| 614 | break; |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 615 | case QEMU_NBD_OPT_DISCARD: |
| 616 | if (seen_discard) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 617 | error_report("--discard can only be specified once"); |
| 618 | exit(EXIT_FAILURE); |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 619 | } |
| 620 | seen_discard = true; |
| 621 | if (bdrv_parse_discard_flags(optarg, &flags) == -1) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 622 | error_report("Invalid discard mode `%s'", optarg); |
| 623 | exit(EXIT_FAILURE); |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 624 | } |
| 625 | break; |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 626 | case QEMU_NBD_OPT_DETECT_ZEROES: |
| 627 | detect_zeroes = |
Marc-André Lureau | f7abe0e | 2017-08-24 10:46:10 +0200 | [diff] [blame] | 628 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 629 | optarg, |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 630 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
| 631 | &local_err); |
| 632 | if (local_err) { |
Markus Armbruster | c29b77f | 2015-12-18 16:35:14 +0100 | [diff] [blame] | 633 | error_reportf_err(local_err, |
| 634 | "Failed to parse detect_zeroes mode: "); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 635 | exit(EXIT_FAILURE); |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 636 | } |
| 637 | if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && |
| 638 | !(flags & BDRV_O_UNMAP)) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 639 | error_report("setting detect-zeroes to unmap is not allowed " |
| 640 | "without setting discard operation to unmap"); |
| 641 | exit(EXIT_FAILURE); |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 642 | } |
| 643 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 644 | case 'b': |
| 645 | bindto = optarg; |
| 646 | break; |
| 647 | case 'p': |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 648 | port = optarg; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 649 | break; |
| 650 | case 'o': |
| 651 | dev_offset = strtoll (optarg, &end, 0); |
| 652 | if (*end) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 653 | error_report("Invalid offset `%s'", optarg); |
| 654 | exit(EXIT_FAILURE); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 655 | } |
| 656 | if (dev_offset < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 657 | error_report("Offset must be positive `%s'", optarg); |
| 658 | exit(EXIT_FAILURE); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 659 | } |
| 660 | break; |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 661 | case 'l': |
| 662 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { |
Markus Armbruster | 70b9433 | 2015-02-13 12:50:26 +0100 | [diff] [blame] | 663 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, |
| 664 | optarg, false); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 665 | if (!sn_opts) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 666 | error_report("Failed in parsing snapshot param `%s'", |
| 667 | optarg); |
| 668 | exit(EXIT_FAILURE); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 669 | } |
| 670 | } else { |
| 671 | sn_id_or_name = optarg; |
| 672 | } |
| 673 | /* fall through */ |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 674 | case 'r': |
Paolo Bonzini | b90fb4b | 2011-09-08 17:24:54 +0200 | [diff] [blame] | 675 | nbdflags |= NBD_FLAG_READ_ONLY; |
Naphtali Sprei | 07108b2 | 2010-03-14 15:19:57 +0200 | [diff] [blame] | 676 | flags &= ~BDRV_O_RDWR; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 677 | break; |
| 678 | case 'P': |
| 679 | partition = strtol(optarg, &end, 0); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 680 | if (*end) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 681 | error_report("Invalid partition `%s'", optarg); |
| 682 | exit(EXIT_FAILURE); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 683 | } |
| 684 | if (partition < 1 || partition > 8) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 685 | error_report("Invalid partition %d", partition); |
| 686 | exit(EXIT_FAILURE); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 687 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 688 | break; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 689 | case 'k': |
Paolo Bonzini | b32f6c2 | 2011-11-04 15:51:20 +0100 | [diff] [blame] | 690 | sockpath = optarg; |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 691 | if (sockpath[0] != '/') { |
Markus Armbruster | 9af9e0f | 2015-12-18 16:35:19 +0100 | [diff] [blame] | 692 | error_report("socket path must be absolute"); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 693 | exit(EXIT_FAILURE); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 694 | } |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 695 | break; |
| 696 | case 'd': |
| 697 | disconnect = true; |
| 698 | break; |
| 699 | case 'c': |
| 700 | device = optarg; |
| 701 | break; |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 702 | case 'e': |
| 703 | shared = strtol(optarg, &end, 0); |
| 704 | if (*end) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 705 | error_report("Invalid shared device number '%s'", optarg); |
| 706 | exit(EXIT_FAILURE); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 707 | } |
| 708 | if (shared < 1) { |
Markus Armbruster | 9af9e0f | 2015-12-18 16:35:19 +0100 | [diff] [blame] | 709 | error_report("Shared device number must be greater than 0"); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 710 | exit(EXIT_FAILURE); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 711 | } |
| 712 | break; |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 713 | case 'f': |
| 714 | fmt = optarg; |
| 715 | break; |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 716 | case 't': |
| 717 | persistent = 1; |
| 718 | break; |
Daniel P. Berrange | 3d4b2f9 | 2016-02-10 18:41:08 +0000 | [diff] [blame] | 719 | case 'x': |
| 720 | export_name = optarg; |
| 721 | break; |
Eric Blake | b1a75b3 | 2016-10-14 13:33:03 -0500 | [diff] [blame] | 722 | case 'D': |
| 723 | export_description = optarg; |
| 724 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 725 | case 'v': |
| 726 | verbose = 1; |
| 727 | break; |
| 728 | case 'V': |
| 729 | version(argv[0]); |
| 730 | exit(0); |
| 731 | break; |
| 732 | case 'h': |
| 733 | usage(argv[0]); |
| 734 | exit(0); |
| 735 | break; |
| 736 | case '?': |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 737 | error_report("Try `%s --help' for more information.", argv[0]); |
| 738 | exit(EXIT_FAILURE); |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 739 | case QEMU_NBD_OPT_OBJECT: { |
| 740 | QemuOpts *opts; |
| 741 | opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| 742 | optarg, true); |
| 743 | if (!opts) { |
| 744 | exit(EXIT_FAILURE); |
| 745 | } |
| 746 | } break; |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 747 | case QEMU_NBD_OPT_TLSCREDS: |
| 748 | tlscredsid = optarg; |
| 749 | break; |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 750 | case QEMU_NBD_OPT_IMAGE_OPTS: |
| 751 | imageOpts = true; |
| 752 | break; |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 753 | case 'T': |
| 754 | g_free(trace_file); |
| 755 | trace_file = trace_opt_parse(optarg); |
| 756 | break; |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 757 | case QEMU_NBD_OPT_FORK: |
| 758 | fork_process = true; |
| 759 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 760 | } |
| 761 | } |
| 762 | |
| 763 | if ((argc - optind) != 1) { |
Markus Armbruster | 433672b | 2015-12-18 16:35:24 +0100 | [diff] [blame] | 764 | error_report("Invalid number of arguments"); |
| 765 | error_printf("Try `%s --help' for more information.\n", argv[0]); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 766 | exit(EXIT_FAILURE); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 767 | } |
| 768 | |
Markus Armbruster | 7e1e0c1 | 2018-10-17 10:26:43 +0200 | [diff] [blame] | 769 | qemu_opts_foreach(&qemu_object_opts, |
| 770 | user_creatable_add_opts_foreach, |
| 771 | NULL, &error_fatal); |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 772 | |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 773 | if (!trace_init_backends()) { |
| 774 | exit(1); |
| 775 | } |
| 776 | trace_init_file(trace_file); |
| 777 | qemu_set_log(LOG_TRACE); |
| 778 | |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 779 | socket_activation = check_socket_activation(); |
| 780 | if (socket_activation == 0) { |
| 781 | setup_address_and_port(&bindto, &port); |
| 782 | } else { |
| 783 | /* Using socket activation - check user didn't use -p etc. */ |
| 784 | const char *err_msg = socket_activation_validate_opts(device, sockpath, |
| 785 | bindto, port); |
| 786 | if (err_msg != NULL) { |
| 787 | error_report("%s", err_msg); |
| 788 | exit(EXIT_FAILURE); |
| 789 | } |
Paolo Bonzini | 53fabd4 | 2017-03-16 16:29:45 +0100 | [diff] [blame] | 790 | |
| 791 | /* qemu-nbd can only listen on a single socket. */ |
| 792 | if (socket_activation > 1) { |
| 793 | error_report("qemu-nbd does not support socket activation with %s > 1", |
| 794 | "LISTEN_FDS"); |
| 795 | exit(EXIT_FAILURE); |
| 796 | } |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 797 | } |
| 798 | |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 799 | if (tlscredsid) { |
| 800 | if (sockpath) { |
| 801 | error_report("TLS is only supported with IPv4/IPv6"); |
| 802 | exit(EXIT_FAILURE); |
| 803 | } |
| 804 | if (device) { |
| 805 | error_report("TLS is not supported with a host device"); |
| 806 | exit(EXIT_FAILURE); |
| 807 | } |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 808 | tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); |
| 809 | if (local_err) { |
| 810 | error_report("Failed to get TLS creds %s", |
| 811 | error_get_pretty(local_err)); |
| 812 | exit(EXIT_FAILURE); |
| 813 | } |
| 814 | } |
| 815 | |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 816 | if (disconnect) { |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 817 | int nbdfd = open(argv[optind], O_RDWR); |
| 818 | if (nbdfd < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 819 | error_report("Cannot open %s: %s", argv[optind], |
| 820 | strerror(errno)); |
| 821 | exit(EXIT_FAILURE); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 822 | } |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 823 | nbd_disconnect(nbdfd); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 824 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 825 | close(nbdfd); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 826 | |
| 827 | printf("%s disconnected\n", argv[optind]); |
| 828 | |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 829 | return 0; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 830 | } |
| 831 | |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 832 | if ((device && !verbose) || fork_process) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 833 | int stderr_fd[2]; |
| 834 | pid_t pid; |
| 835 | int ret; |
| 836 | |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 837 | if (qemu_pipe(stderr_fd) < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 838 | error_report("Error setting up communication pipe: %s", |
| 839 | strerror(errno)); |
| 840 | exit(EXIT_FAILURE); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | /* Now daemonize, but keep a communication channel open to |
| 844 | * print errors and exit with the proper status code. |
| 845 | */ |
| 846 | pid = fork(); |
Max Reitz | 70d4739 | 2015-02-25 13:08:22 -0500 | [diff] [blame] | 847 | if (pid < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 848 | error_report("Failed to fork: %s", strerror(errno)); |
| 849 | exit(EXIT_FAILURE); |
Max Reitz | 70d4739 | 2015-02-25 13:08:22 -0500 | [diff] [blame] | 850 | } else if (pid == 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 851 | close(stderr_fd[0]); |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 852 | ret = qemu_daemon(1, 0); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 853 | |
| 854 | /* Temporarily redirect stderr to the parent's pipe... */ |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 855 | old_stderr = dup(STDERR_FILENO); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 856 | dup2(stderr_fd[1], STDERR_FILENO); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 857 | if (ret < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 858 | error_report("Failed to daemonize: %s", strerror(errno)); |
| 859 | exit(EXIT_FAILURE); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 860 | } |
| 861 | |
| 862 | /* ... close the descriptor we inherited and go on. */ |
| 863 | close(stderr_fd[1]); |
| 864 | } else { |
| 865 | bool errors = false; |
| 866 | char *buf; |
| 867 | |
| 868 | /* In the parent. Print error messages from the child until |
| 869 | * it closes the pipe. |
| 870 | */ |
| 871 | close(stderr_fd[1]); |
| 872 | buf = g_malloc(1024); |
| 873 | while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { |
| 874 | errors = true; |
| 875 | ret = qemu_write_full(STDERR_FILENO, buf, ret); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 876 | if (ret < 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 877 | exit(EXIT_FAILURE); |
| 878 | } |
| 879 | } |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 880 | if (ret < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 881 | error_report("Cannot read from daemon: %s", |
| 882 | strerror(errno)); |
| 883 | exit(EXIT_FAILURE); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 884 | } |
| 885 | |
| 886 | /* Usually the daemon should not print any message. |
| 887 | * Exit with zero status in that case. |
| 888 | */ |
| 889 | exit(errors); |
| 890 | } |
| 891 | } |
| 892 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 893 | if (device != NULL && sockpath == NULL) { |
| 894 | sockpath = g_malloc(128); |
| 895 | snprintf(sockpath, 128, SOCKET_PATH, basename(device)); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 896 | } |
| 897 | |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 898 | server = qio_net_listener_new(); |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 899 | if (socket_activation == 0) { |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 900 | saddr = nbd_build_socket_address(sockpath, bindto, port); |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 901 | if (qio_net_listener_open_sync(server, saddr, &local_err) < 0) { |
| 902 | object_unref(OBJECT(server)); |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 903 | error_report_err(local_err); |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 904 | exit(EXIT_FAILURE); |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 905 | } |
| 906 | } else { |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 907 | size_t i; |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 908 | /* See comment in check_socket_activation above. */ |
Daniel P. Berrange | e4849c1 | 2017-12-18 10:16:43 +0000 | [diff] [blame] | 909 | for (i = 0; i < socket_activation; i++) { |
| 910 | QIOChannelSocket *sioc; |
| 911 | sioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD + i, |
| 912 | &local_err); |
| 913 | if (sioc == NULL) { |
| 914 | object_unref(OBJECT(server)); |
| 915 | error_report("Failed to use socket activation: %s", |
| 916 | error_get_pretty(local_err)); |
| 917 | exit(EXIT_FAILURE); |
| 918 | } |
| 919 | qio_net_listener_add(server, sioc); |
| 920 | object_unref(OBJECT(sioc)); |
Richard W.M. Jones | a721f53 | 2017-02-04 10:03:17 +0000 | [diff] [blame] | 921 | } |
| 922 | } |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 923 | |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 924 | if (qemu_init_main_loop(&local_err)) { |
Markus Armbruster | 565f65d | 2015-02-12 13:55:05 +0100 | [diff] [blame] | 925 | error_report_err(local_err); |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 926 | exit(EXIT_FAILURE); |
| 927 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 928 | bdrv_init(); |
Kevin Wolf | b3b5299 | 2018-05-16 13:46:37 +0200 | [diff] [blame] | 929 | atexit(qemu_nbd_shutdown); |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 930 | |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 931 | srcpath = argv[optind]; |
| 932 | if (imageOpts) { |
| 933 | QemuOpts *opts; |
| 934 | if (fmt) { |
| 935 | error_report("--image-opts and -f are mutually exclusive"); |
| 936 | exit(EXIT_FAILURE); |
| 937 | } |
| 938 | opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); |
| 939 | if (!opts) { |
| 940 | qemu_opts_reset(&file_opts); |
| 941 | exit(EXIT_FAILURE); |
| 942 | } |
| 943 | options = qemu_opts_to_qdict(opts, NULL); |
| 944 | qemu_opts_reset(&file_opts); |
Max Reitz | efaa7c4 | 2016-03-16 19:54:38 +0100 | [diff] [blame] | 945 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 946 | } else { |
| 947 | if (fmt) { |
| 948 | options = qdict_new(); |
Eric Blake | 46f5ac2 | 2017-04-27 16:58:17 -0500 | [diff] [blame] | 949 | qdict_put_str(options, "driver", fmt); |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 950 | } |
Max Reitz | efaa7c4 | 2016-03-16 19:54:38 +0100 | [diff] [blame] | 951 | blk = blk_new_open(srcpath, NULL, options, flags, &local_err); |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 952 | } |
| 953 | |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 954 | if (!blk) { |
Markus Armbruster | c29b77f | 2015-12-18 16:35:14 +0100 | [diff] [blame] | 955 | error_reportf_err(local_err, "Failed to blk_new_open '%s': ", |
| 956 | argv[optind]); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 957 | exit(EXIT_FAILURE); |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 958 | } |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 959 | bs = blk_bs(blk); |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 960 | |
Kevin Wolf | 6effd5b | 2016-03-14 11:43:28 +0100 | [diff] [blame] | 961 | blk_set_enable_write_cache(blk, !writethrough); |
| 962 | |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 963 | if (sn_opts) { |
| 964 | ret = bdrv_snapshot_load_tmp(bs, |
| 965 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), |
| 966 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), |
| 967 | &local_err); |
| 968 | } else if (sn_id_or_name) { |
| 969 | ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, |
| 970 | &local_err); |
| 971 | } |
| 972 | if (ret < 0) { |
Markus Armbruster | c29b77f | 2015-12-18 16:35:14 +0100 | [diff] [blame] | 973 | error_reportf_err(local_err, "Failed to load snapshot: "); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 974 | exit(EXIT_FAILURE); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 975 | } |
| 976 | |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 977 | bs->detect_zeroes = detect_zeroes; |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 978 | fd_size = blk_getlength(blk); |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 979 | if (fd_size < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 980 | error_report("Failed to determine the image length: %s", |
| 981 | strerror(-fd_size)); |
| 982 | exit(EXIT_FAILURE); |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 983 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 984 | |
Tomáš Golembiovský | e424b65 | 2016-10-05 23:40:20 +0200 | [diff] [blame] | 985 | if (dev_offset >= fd_size) { |
| 986 | error_report("Offset (%lld) has to be smaller than the image size " |
| 987 | "(%lld)", |
| 988 | (long long int)dev_offset, (long long int)fd_size); |
| 989 | exit(EXIT_FAILURE); |
| 990 | } |
| 991 | fd_size -= dev_offset; |
| 992 | |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 993 | if (partition != -1) { |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 994 | ret = find_partition(blk, partition, &dev_offset, &fd_size); |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 995 | if (ret < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 996 | error_report("Could not find partition %d: %s", partition, |
Markus Armbruster | a4699e5 | 2015-12-18 16:35:10 +0100 | [diff] [blame] | 997 | strerror(-ret)); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 998 | exit(EXIT_FAILURE); |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 999 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 1000 | } |
| 1001 | |
Kevin Wolf | cd7fca9 | 2016-07-06 11:22:39 +0200 | [diff] [blame] | 1002 | exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed, |
Markus Armbruster | 50beeb6 | 2018-10-17 10:26:26 +0200 | [diff] [blame] | 1003 | writethrough, NULL, &error_fatal); |
Vladimir Sementsov-Ogievskiy | f5cd0bb | 2018-10-03 20:02:27 +0300 | [diff] [blame] | 1004 | nbd_export_set_name(exp, export_name); |
| 1005 | nbd_export_set_description(exp, export_description); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 1006 | |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 1007 | if (device) { |
| 1008 | int ret; |
| 1009 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 1010 | ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 1011 | if (ret != 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 1012 | error_report("Failed to create client thread: %s", strerror(ret)); |
| 1013 | exit(EXIT_FAILURE); |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 1014 | } |
| 1015 | } else { |
| 1016 | /* Shut up GCC warnings. */ |
| 1017 | memset(&client_thread, 0, sizeof(client_thread)); |
| 1018 | } |
| 1019 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 1020 | nbd_update_server_watch(); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 1021 | |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 1022 | /* now when the initialization is (almost) complete, chdir("/") |
| 1023 | * to free any busy filesystems */ |
| 1024 | if (chdir("/") < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 1025 | error_report("Could not chdir to root directory: %s", |
| 1026 | strerror(errno)); |
| 1027 | exit(EXIT_FAILURE); |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 1028 | } |
| 1029 | |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 1030 | if (fork_process) { |
| 1031 | dup2(old_stderr, STDERR_FILENO); |
| 1032 | close(old_stderr); |
| 1033 | } |
| 1034 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 1035 | state = RUNNING; |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 1036 | do { |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 1037 | main_loop_wait(false); |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 1038 | if (state == TERMINATE) { |
| 1039 | state = TERMINATING; |
| 1040 | nbd_export_close(exp); |
| 1041 | nbd_export_put(exp); |
| 1042 | exp = NULL; |
| 1043 | } |
| 1044 | } while (state != TERMINATED); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 1045 | |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 1046 | blk_unref(blk); |
Paolo Bonzini | b32f6c2 | 2011-11-04 15:51:20 +0100 | [diff] [blame] | 1047 | if (sockpath) { |
| 1048 | unlink(sockpath); |
| 1049 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 1050 | |
Markus Armbruster | fbf28a4 | 2014-09-29 16:07:55 +0200 | [diff] [blame] | 1051 | qemu_opts_del(sn_opts); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 1052 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 1053 | if (device) { |
| 1054 | void *ret; |
| 1055 | pthread_join(client_thread, &ret); |
| 1056 | exit(ret != NULL); |
| 1057 | } else { |
| 1058 | exit(EXIT_SUCCESS); |
| 1059 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 1060 | } |