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" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 20 | #include "qapi/error.h" |
Stefan Weil | 5a61cb6 | 2011-09-08 17:55:32 +0200 | [diff] [blame] | 21 | #include "qemu-common.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 22 | #include "qemu/cutils.h" |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 23 | #include "sysemu/block-backend.h" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 24 | #include "block/block_int.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 25 | #include "block/nbd.h" |
Alex Bligh | 6a1751b | 2013-08-21 16:02:47 +0100 | [diff] [blame] | 26 | #include "qemu/main-loop.h" |
Paolo Bonzini | 537b41f | 2014-02-17 14:43:51 +0100 | [diff] [blame] | 27 | #include "qemu/error-report.h" |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 28 | #include "qemu/config-file.h" |
Paolo Bonzini | 58369e2 | 2016-03-15 17:22:36 +0100 | [diff] [blame] | 29 | #include "qemu/bswap.h" |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 30 | #include "qemu/log.h" |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 31 | #include "block/snapshot.h" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 32 | #include "qapi/util.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 33 | #include "qapi/qmp/qstring.h" |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 34 | #include "qom/object_interfaces.h" |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 35 | #include "io/channel-socket.h" |
Daniel P. Berrange | c229708 | 2016-04-06 12:12:06 +0100 | [diff] [blame] | 36 | #include "crypto/init.h" |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 37 | #include "trace/control.h" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 38 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 39 | #include <getopt.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" |
Daniel P. Berrange | fa8b7ce | 2016-02-17 10:10:21 +0000 | [diff] [blame] | 44 | #define QEMU_NBD_OPT_CACHE 256 |
| 45 | #define QEMU_NBD_OPT_AIO 257 |
| 46 | #define QEMU_NBD_OPT_DISCARD 258 |
| 47 | #define QEMU_NBD_OPT_DETECT_ZEROES 259 |
| 48 | #define QEMU_NBD_OPT_OBJECT 260 |
| 49 | #define QEMU_NBD_OPT_TLSCREDS 261 |
| 50 | #define QEMU_NBD_OPT_IMAGE_OPTS 262 |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 51 | #define QEMU_NBD_OPT_FORK 263 |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 52 | |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 53 | #define MBR_SIZE 512 |
| 54 | |
Paolo Bonzini | af49bbb | 2011-09-19 14:03:37 +0200 | [diff] [blame] | 55 | static NBDExport *exp; |
Daniel P. Berrange | 3d4b2f9 | 2016-02-10 18:41:08 +0000 | [diff] [blame] | 56 | static bool newproto; |
blueswir1 | b1d8e52 | 2008-10-26 13:43:07 +0000 | [diff] [blame] | 57 | static int verbose; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 58 | static char *srcpath; |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 59 | static SocketAddress *saddr; |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 60 | static int persistent = 0; |
| 61 | static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 62 | static int shared = 1; |
| 63 | static int nb_fds; |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 64 | static QIOChannelSocket *server_ioc; |
| 65 | static int server_watch = -1; |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 66 | static QCryptoTLSCreds *tlscreds; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 67 | |
| 68 | static void usage(const char *name) |
| 69 | { |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 70 | (printf) ( |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 71 | "Usage: %s [OPTIONS] FILE\n" |
| 72 | "QEMU Disk Network Block Device Server\n" |
| 73 | "\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 74 | " -h, --help display this help and exit\n" |
| 75 | " -V, --version output version information and exit\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 76 | "\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 77 | "Connection properties:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 78 | " -p, --port=PORT port to listen on (default `%d')\n" |
| 79 | " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" |
| 80 | " -k, --socket=PATH path to the unix socket\n" |
| 81 | " (default '"SOCKET_PATH"')\n" |
| 82 | " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" |
| 83 | " -t, --persistent don't exit on the last connection\n" |
| 84 | " -v, --verbose display extra debugging information\n" |
Eric Blake | 332a254 | 2016-04-05 20:02:08 -0600 | [diff] [blame] | 85 | " -x, --export-name=NAME expose export by name\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 86 | "\n" |
| 87 | "Exposing part of the image:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 88 | " -o, --offset=OFFSET offset into the image\n" |
| 89 | " -P, --partition=NUM only expose partition NUM\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 90 | "\n" |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 91 | "General purpose options:\n" |
| 92 | " --object type,id=ID,... define an object such as 'secret' for providing\n" |
| 93 | " passwords and/or encryption keys\n" |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 94 | " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
| 95 | " specify tracing options\n" |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 96 | " --fork fork off the server process and exit the parent\n" |
| 97 | " once the server is running\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 98 | #ifdef __linux__ |
| 99 | "Kernel NBD client support:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 100 | " -c, --connect=DEV connect FILE to the local NBD device DEV\n" |
| 101 | " -d, --disconnect disconnect the specified device\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 102 | "\n" |
| 103 | #endif |
| 104 | "\n" |
| 105 | "Block device options:\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 106 | " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" |
| 107 | " -r, --read-only export read-only\n" |
| 108 | " -s, --snapshot use FILE as an external snapshot, create a temporary\n" |
| 109 | " file with backing_file=FILE, redirect the write to\n" |
| 110 | " the temporary one\n" |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 111 | " -l, --load-snapshot=SNAPSHOT_PARAM\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 112 | " load an internal snapshot inside FILE and export it\n" |
| 113 | " as an read-only device, SNAPSHOT_PARAM format is\n" |
| 114 | " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" |
| 115 | " '[ID_OR_NAME]'\n" |
| 116 | " -n, --nocache disable host cache\n" |
| 117 | " --cache=MODE set cache mode (none, writeback, ...)\n" |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 118 | " --aio=MODE set AIO mode (native or threads)\n" |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 119 | " --discard=MODE set discard mode (ignore, unmap)\n" |
Andrey Korolyov | 6883de6 | 2015-07-31 22:12:54 +0300 | [diff] [blame] | 120 | " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 121 | " --image-opts treat FILE as a full set of image options\n" |
Paolo Bonzini | b033cd8 | 2012-07-18 14:50:52 +0200 | [diff] [blame] | 122 | "\n" |
| 123 | "Report bugs to <qemu-devel@nongnu.org>\n" |
Laurent Vivier | c2e2872 | 2010-09-17 20:37:25 +0200 | [diff] [blame] | 124 | , name, NBD_DEFAULT_PORT, "DEVICE"); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | static void version(const char *name) |
| 128 | { |
| 129 | printf( |
ths | 315bc7a | 2008-07-18 18:06:23 +0000 | [diff] [blame] | 130 | "%s version 0.0.1\n" |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 131 | "Written by Anthony Liguori.\n" |
| 132 | "\n" |
| 133 | "Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.\n" |
| 134 | "This is free software; see the source for copying conditions. There is NO\n" |
| 135 | "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" |
ths | 315bc7a | 2008-07-18 18:06:23 +0000 | [diff] [blame] | 136 | , name); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | struct partition_record |
| 140 | { |
| 141 | uint8_t bootable; |
| 142 | uint8_t start_head; |
| 143 | uint32_t start_cylinder; |
| 144 | uint8_t start_sector; |
| 145 | uint8_t system; |
| 146 | uint8_t end_head; |
| 147 | uint8_t end_cylinder; |
| 148 | uint8_t end_sector; |
| 149 | uint32_t start_sector_abs; |
| 150 | uint32_t nb_sectors_abs; |
| 151 | }; |
| 152 | |
| 153 | static void read_partition(uint8_t *p, struct partition_record *r) |
| 154 | { |
| 155 | r->bootable = p[0]; |
| 156 | r->start_head = p[1]; |
| 157 | r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); |
| 158 | r->start_sector = p[2] & 0x3f; |
| 159 | r->system = p[4]; |
| 160 | r->end_head = p[5]; |
| 161 | r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); |
| 162 | r->end_sector = p[6] & 0x3f; |
Max Reitz | ac97393 | 2015-02-25 13:08:23 -0500 | [diff] [blame] | 163 | |
Peter Maydell | 773dce3 | 2016-06-10 16:00:36 +0100 | [diff] [blame] | 164 | r->start_sector_abs = ldl_le_p(p + 8); |
| 165 | r->nb_sectors_abs = ldl_le_p(p + 12); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 166 | } |
| 167 | |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 168 | static int find_partition(BlockBackend *blk, int partition, |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 169 | off_t *offset, off_t *size) |
| 170 | { |
| 171 | struct partition_record mbr[4]; |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 172 | uint8_t data[MBR_SIZE]; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 173 | int i; |
| 174 | int ext_partnum = 4; |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 175 | int ret; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 176 | |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 177 | ret = blk_pread(blk, 0, data, sizeof(data)); |
| 178 | if (ret < 0) { |
Markus Armbruster | a4699e5 | 2015-12-18 16:35:10 +0100 | [diff] [blame] | 179 | error_report("error while reading: %s", strerror(-ret)); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 180 | exit(EXIT_FAILURE); |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 181 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 182 | |
| 183 | if (data[510] != 0x55 || data[511] != 0xaa) { |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 184 | return -EINVAL; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | for (i = 0; i < 4; i++) { |
| 188 | read_partition(&data[446 + 16 * i], &mbr[i]); |
| 189 | |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 190 | if (!mbr[i].system || !mbr[i].nb_sectors_abs) { |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 191 | continue; |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 192 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 193 | |
| 194 | if (mbr[i].system == 0xF || mbr[i].system == 0x5) { |
| 195 | struct partition_record ext[4]; |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 196 | uint8_t data1[MBR_SIZE]; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 197 | int j; |
| 198 | |
Eric Blake | bd31c21 | 2016-05-06 10:26:42 -0600 | [diff] [blame] | 199 | ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE, |
| 200 | data1, sizeof(data1)); |
| 201 | if (ret < 0) { |
Markus Armbruster | a4699e5 | 2015-12-18 16:35:10 +0100 | [diff] [blame] | 202 | error_report("error while reading: %s", strerror(-ret)); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 203 | exit(EXIT_FAILURE); |
Ryota Ozaki | cb7cf0e | 2010-05-03 06:50:25 +0900 | [diff] [blame] | 204 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 205 | |
| 206 | for (j = 0; j < 4; j++) { |
| 207 | read_partition(&data1[446 + 16 * j], &ext[j]); |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 208 | if (!ext[j].system || !ext[j].nb_sectors_abs) { |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 209 | continue; |
Max Reitz | 453b07b | 2015-02-25 13:08:15 -0500 | [diff] [blame] | 210 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 211 | |
| 212 | if ((ext_partnum + j + 1) == partition) { |
| 213 | *offset = (uint64_t)ext[j].start_sector_abs << 9; |
| 214 | *size = (uint64_t)ext[j].nb_sectors_abs << 9; |
| 215 | return 0; |
| 216 | } |
| 217 | } |
| 218 | ext_partnum += 4; |
| 219 | } else if ((i + 1) == partition) { |
| 220 | *offset = (uint64_t)mbr[i].start_sector_abs << 9; |
| 221 | *size = (uint64_t)mbr[i].nb_sectors_abs << 9; |
| 222 | return 0; |
| 223 | } |
| 224 | } |
| 225 | |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 226 | return -ENOENT; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 227 | } |
| 228 | |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 229 | static void termsig_handler(int signum) |
| 230 | { |
Pavel Butsykin | 23994a5 | 2016-04-14 13:20:15 +0300 | [diff] [blame] | 231 | atomic_cmpxchg(&state, RUNNING, TERMINATE); |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 232 | qemu_notify_event(); |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 233 | } |
| 234 | |
Paolo Bonzini | 537b41f | 2014-02-17 14:43:51 +0100 | [diff] [blame] | 235 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 236 | static void *show_parts(void *arg) |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 237 | { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 238 | char *device = arg; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 239 | int nbd; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 240 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 241 | /* linux just needs an open() to trigger |
| 242 | * the partition table update |
| 243 | * but remember to load the module with max_part != 0 : |
| 244 | * modprobe nbd max_part=63 |
| 245 | */ |
| 246 | nbd = open(device, O_RDWR); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 247 | if (nbd >= 0) { |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 248 | close(nbd); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 249 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 250 | return NULL; |
| 251 | } |
| 252 | |
| 253 | static void *nbd_client_thread(void *arg) |
| 254 | { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 255 | char *device = arg; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 256 | off_t size; |
Eric Blake | 7423f41 | 2016-07-21 13:34:46 -0600 | [diff] [blame] | 257 | uint16_t nbdflags; |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 258 | QIOChannelSocket *sioc; |
| 259 | int fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 260 | int ret; |
| 261 | pthread_t show_parts_thread; |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 262 | Error *local_error = NULL; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 263 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 264 | sioc = qio_channel_socket_new(); |
| 265 | if (qio_channel_socket_connect_sync(sioc, |
| 266 | saddr, |
| 267 | &local_error) < 0) { |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 268 | error_report_err(local_error); |
Stefan Hajnoczi | dc10e8b | 2012-01-05 13:16:07 +0000 | [diff] [blame] | 269 | goto out; |
| 270 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 271 | |
Daniel P. Berrange | 1c778ef | 2016-02-10 18:41:04 +0000 | [diff] [blame] | 272 | ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags, |
Daniel P. Berrange | f95910f | 2016-02-10 18:41:11 +0000 | [diff] [blame] | 273 | NULL, NULL, NULL, |
Max Reitz | 3f47265 | 2015-02-25 13:08:25 -0500 | [diff] [blame] | 274 | &size, &local_error); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 275 | if (ret < 0) { |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 276 | if (local_error) { |
Markus Armbruster | 7828867 | 2015-12-18 16:35:07 +0100 | [diff] [blame] | 277 | error_report_err(local_error); |
Max Reitz | 1ce5284 | 2015-01-26 21:02:59 -0500 | [diff] [blame] | 278 | } |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 279 | goto out_socket; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 280 | } |
| 281 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 282 | fd = open(device, O_RDWR); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 283 | if (fd < 0) { |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 284 | /* Linux-only, we can use %m in printf. */ |
Markus Armbruster | b988468 | 2015-12-18 16:35:18 +0100 | [diff] [blame] | 285 | error_report("Failed to open %s: %m", device); |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 286 | goto out_socket; |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 287 | } |
| 288 | |
Daniel P. Berrange | 1c778ef | 2016-02-10 18:41:04 +0000 | [diff] [blame] | 289 | ret = nbd_init(fd, sioc, nbdflags, size); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 290 | if (ret < 0) { |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 291 | goto out_fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | /* update partition table */ |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 295 | pthread_create(&show_parts_thread, NULL, show_parts, device); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 296 | |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 297 | if (verbose) { |
| 298 | fprintf(stderr, "NBD device %s is now connected to %s\n", |
| 299 | device, srcpath); |
| 300 | } else { |
| 301 | /* Close stderr so that the qemu-nbd process exits. */ |
| 302 | dup2(STDOUT_FILENO, STDERR_FILENO); |
| 303 | } |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 304 | |
| 305 | ret = nbd_client(fd); |
| 306 | if (ret) { |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 307 | goto out_fd; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 308 | } |
| 309 | close(fd); |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 310 | object_unref(OBJECT(sioc)); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 311 | kill(getpid(), SIGTERM); |
| 312 | return (void *) EXIT_SUCCESS; |
| 313 | |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 314 | out_fd: |
| 315 | close(fd); |
| 316 | out_socket: |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 317 | object_unref(OBJECT(sioc)); |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 318 | out: |
| 319 | kill(getpid(), SIGTERM); |
| 320 | return (void *) EXIT_FAILURE; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 321 | } |
| 322 | |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 323 | static int nbd_can_accept(void) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 324 | { |
| 325 | return nb_fds < shared; |
| 326 | } |
| 327 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 328 | static void nbd_export_closed(NBDExport *exp) |
| 329 | { |
| 330 | assert(state == TERMINATING); |
| 331 | state = TERMINATED; |
| 332 | } |
| 333 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 334 | static void nbd_update_server_watch(void); |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 335 | |
Paolo Bonzini | 1743b51 | 2011-09-19 14:33:23 +0200 | [diff] [blame] | 336 | static void nbd_client_closed(NBDClient *client) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 337 | { |
Paolo Bonzini | 1743b51 | 2011-09-19 14:33:23 +0200 | [diff] [blame] | 338 | nb_fds--; |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 339 | if (nb_fds == 0 && !persistent && state == RUNNING) { |
| 340 | state = TERMINATE; |
| 341 | } |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 342 | nbd_update_server_watch(); |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 343 | nbd_client_put(client); |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 344 | } |
| 345 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 346 | static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque) |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 347 | { |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 348 | QIOChannelSocket *cioc; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 349 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 350 | cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), |
| 351 | NULL); |
| 352 | if (!cioc) { |
| 353 | return TRUE; |
Paolo Bonzini | 0c544d7 | 2014-03-14 18:10:54 +0100 | [diff] [blame] | 354 | } |
| 355 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 356 | if (state >= TERMINATE) { |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 357 | object_unref(OBJECT(cioc)); |
| 358 | return TRUE; |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 359 | } |
| 360 | |
Fam Zheng | ee7d7aa | 2016-01-14 16:41:01 +0800 | [diff] [blame] | 361 | nb_fds++; |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 362 | nbd_update_server_watch(); |
Daniel P. Berrange | f95910f | 2016-02-10 18:41:11 +0000 | [diff] [blame] | 363 | nbd_client_new(newproto ? NULL : exp, cioc, |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 364 | tlscreds, NULL, nbd_client_closed); |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 365 | object_unref(OBJECT(cioc)); |
| 366 | |
| 367 | return TRUE; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 368 | } |
| 369 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 370 | static void nbd_update_server_watch(void) |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 371 | { |
| 372 | if (nbd_can_accept()) { |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 373 | if (server_watch == -1) { |
| 374 | server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), |
| 375 | G_IO_IN, |
| 376 | nbd_accept, |
| 377 | NULL, NULL); |
| 378 | } |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 379 | } else { |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 380 | if (server_watch != -1) { |
| 381 | g_source_remove(server_watch); |
| 382 | server_watch = -1; |
| 383 | } |
Fam Zheng | e4afbf4 | 2015-05-19 10:50:59 +0000 | [diff] [blame] | 384 | } |
| 385 | } |
| 386 | |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 387 | |
| 388 | static SocketAddress *nbd_build_socket_address(const char *sockpath, |
| 389 | const char *bindto, |
| 390 | const char *port) |
| 391 | { |
| 392 | SocketAddress *saddr; |
| 393 | |
| 394 | saddr = g_new0(SocketAddress, 1); |
| 395 | if (sockpath) { |
Eric Blake | 2d32add | 2015-10-26 16:34:55 -0600 | [diff] [blame] | 396 | saddr->type = SOCKET_ADDRESS_KIND_UNIX; |
Eric Blake | 32bafa8 | 2016-03-17 16:48:37 -0600 | [diff] [blame] | 397 | saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1); |
| 398 | saddr->u.q_unix.data->path = g_strdup(sockpath); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 399 | } else { |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 400 | InetSocketAddress *inet; |
Eric Blake | 2d32add | 2015-10-26 16:34:55 -0600 | [diff] [blame] | 401 | saddr->type = SOCKET_ADDRESS_KIND_INET; |
Eric Blake | 32bafa8 | 2016-03-17 16:48:37 -0600 | [diff] [blame] | 402 | inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1); |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 403 | inet->host = g_strdup(bindto); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 404 | if (port) { |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 405 | inet->port = g_strdup(port); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 406 | } else { |
Eric Blake | 0399293 | 2016-03-03 09:16:48 -0700 | [diff] [blame] | 407 | inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 408 | } |
| 409 | } |
| 410 | |
| 411 | return saddr; |
| 412 | } |
| 413 | |
| 414 | |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 415 | static QemuOptsList file_opts = { |
| 416 | .name = "file", |
| 417 | .implied_opt_name = "file", |
| 418 | .head = QTAILQ_HEAD_INITIALIZER(file_opts.head), |
| 419 | .desc = { |
| 420 | /* no elements => accept any params */ |
| 421 | { /* end of list */ } |
| 422 | }, |
| 423 | }; |
| 424 | |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 425 | static QemuOptsList qemu_object_opts = { |
| 426 | .name = "object", |
| 427 | .implied_opt_name = "qom-type", |
| 428 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), |
| 429 | .desc = { |
| 430 | { } |
| 431 | }, |
| 432 | }; |
| 433 | |
| 434 | |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 435 | |
| 436 | static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp) |
| 437 | { |
| 438 | Object *obj; |
| 439 | QCryptoTLSCreds *creds; |
| 440 | |
| 441 | obj = object_resolve_path_component( |
| 442 | object_get_objects_root(), id); |
| 443 | if (!obj) { |
| 444 | error_setg(errp, "No TLS credentials with id '%s'", |
| 445 | id); |
| 446 | return NULL; |
| 447 | } |
| 448 | creds = (QCryptoTLSCreds *) |
| 449 | object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS); |
| 450 | if (!creds) { |
| 451 | error_setg(errp, "Object with id '%s' is not TLS credentials", |
| 452 | id); |
| 453 | return NULL; |
| 454 | } |
| 455 | |
| 456 | if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { |
| 457 | error_setg(errp, |
| 458 | "Expecting TLS credentials with a server endpoint"); |
| 459 | return NULL; |
| 460 | } |
| 461 | object_ref(obj); |
| 462 | return creds; |
| 463 | } |
| 464 | |
| 465 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 466 | int main(int argc, char **argv) |
| 467 | { |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 468 | BlockBackend *blk; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 469 | BlockDriverState *bs; |
| 470 | off_t dev_offset = 0; |
Eric Blake | 7423f41 | 2016-07-21 13:34:46 -0600 | [diff] [blame] | 471 | uint16_t nbdflags = 0; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 472 | bool disconnect = false; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 473 | const char *bindto = "0.0.0.0"; |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 474 | const char *port = NULL; |
| 475 | char *sockpath = NULL; |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 476 | char *device = NULL; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 477 | off_t fd_size; |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 478 | QemuOpts *sn_opts = NULL; |
| 479 | const char *sn_id_or_name = NULL; |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 480 | const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:"; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 481 | struct option lopt[] = { |
Daniel P. Berrange | aa6e546 | 2016-02-17 10:10:22 +0000 | [diff] [blame] | 482 | { "help", no_argument, NULL, 'h' }, |
| 483 | { "version", no_argument, NULL, 'V' }, |
| 484 | { "bind", required_argument, NULL, 'b' }, |
| 485 | { "port", required_argument, NULL, 'p' }, |
| 486 | { "socket", required_argument, NULL, 'k' }, |
| 487 | { "offset", required_argument, NULL, 'o' }, |
| 488 | { "read-only", no_argument, NULL, 'r' }, |
| 489 | { "partition", required_argument, NULL, 'P' }, |
| 490 | { "connect", required_argument, NULL, 'c' }, |
| 491 | { "disconnect", no_argument, NULL, 'd' }, |
| 492 | { "snapshot", no_argument, NULL, 's' }, |
| 493 | { "load-snapshot", required_argument, NULL, 'l' }, |
| 494 | { "nocache", no_argument, NULL, 'n' }, |
| 495 | { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE }, |
| 496 | { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO }, |
| 497 | { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD }, |
| 498 | { "detect-zeroes", required_argument, NULL, |
| 499 | QEMU_NBD_OPT_DETECT_ZEROES }, |
| 500 | { "shared", required_argument, NULL, 'e' }, |
| 501 | { "format", required_argument, NULL, 'f' }, |
| 502 | { "persistent", no_argument, NULL, 't' }, |
| 503 | { "verbose", no_argument, NULL, 'v' }, |
| 504 | { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT }, |
| 505 | { "export-name", required_argument, NULL, 'x' }, |
| 506 | { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS }, |
| 507 | { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS }, |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 508 | { "trace", required_argument, NULL, 'T' }, |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 509 | { "fork", no_argument, NULL, QEMU_NBD_OPT_FORK }, |
Blue Swirl | 660f11b | 2009-07-31 21:16:51 +0000 | [diff] [blame] | 510 | { NULL, 0, NULL, 0 } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 511 | }; |
| 512 | int ch; |
| 513 | int opt_ind = 0; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 514 | char *end; |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 515 | int flags = BDRV_O_RDWR; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 516 | int partition = -1; |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 517 | int ret = 0; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 518 | bool seen_cache = false; |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 519 | bool seen_discard = false; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 520 | bool seen_aio = false; |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 521 | pthread_t client_thread; |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 522 | const char *fmt = NULL; |
Max Reitz | 34b5d2c | 2013-09-05 14:45:29 +0200 | [diff] [blame] | 523 | Error *local_err = NULL; |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 524 | BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 525 | QDict *options = NULL; |
Daniel P. Berrange | 3d4b2f9 | 2016-02-10 18:41:08 +0000 | [diff] [blame] | 526 | const char *export_name = NULL; |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 527 | const char *tlscredsid = NULL; |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 528 | bool imageOpts = false; |
Kevin Wolf | 6effd5b | 2016-03-14 11:43:28 +0100 | [diff] [blame] | 529 | bool writethrough = true; |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 530 | char *trace_file = NULL; |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 531 | bool fork_process = false; |
| 532 | int old_stderr = -1; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 533 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 534 | /* The client thread uses SIGTERM to interrupt the server. A signal |
| 535 | * handler ensures that "qemu-nbd -v -c" exits with a nice status code. |
| 536 | */ |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 537 | struct sigaction sa_sigterm; |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 538 | memset(&sa_sigterm, 0, sizeof(sa_sigterm)); |
| 539 | sa_sigterm.sa_handler = termsig_handler; |
| 540 | sigaction(SIGTERM, &sa_sigterm, NULL); |
Daniel P. Berrange | c229708 | 2016-04-06 12:12:06 +0100 | [diff] [blame] | 541 | |
Daniel P. Berrange | fe4db84 | 2016-10-04 14:35:52 +0100 | [diff] [blame] | 542 | module_call_init(MODULE_INIT_TRACE); |
Eduardo Habkost | e8f2d27 | 2016-05-12 11:10:04 -0300 | [diff] [blame] | 543 | qcrypto_init(&error_fatal); |
Daniel P. Berrange | c229708 | 2016-04-06 12:12:06 +0100 | [diff] [blame] | 544 | |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 545 | module_call_init(MODULE_INIT_QOM); |
| 546 | qemu_add_opts(&qemu_object_opts); |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 547 | qemu_add_opts(&qemu_trace_opts); |
Fam Zheng | 10f5bff | 2014-02-10 14:48:51 +0800 | [diff] [blame] | 548 | qemu_init_exec_dir(argv[0]); |
Paolo Bonzini | bb34511 | 2011-11-04 15:51:19 +0100 | [diff] [blame] | 549 | |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 550 | while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { |
| 551 | switch (ch) { |
| 552 | case 's': |
ths | 2f72648 | 2008-07-03 11:47:46 +0000 | [diff] [blame] | 553 | flags |= BDRV_O_SNAPSHOT; |
| 554 | break; |
| 555 | case 'n': |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 556 | optarg = (char *) "none"; |
| 557 | /* fallthrough */ |
| 558 | case QEMU_NBD_OPT_CACHE: |
| 559 | if (seen_cache) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 560 | error_report("-n and --cache can only be specified once"); |
| 561 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 562 | } |
| 563 | seen_cache = true; |
Kevin Wolf | 6effd5b | 2016-03-14 11:43:28 +0100 | [diff] [blame] | 564 | if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 565 | error_report("Invalid cache mode `%s'", optarg); |
| 566 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 567 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 568 | break; |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 569 | case QEMU_NBD_OPT_AIO: |
| 570 | if (seen_aio) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 571 | error_report("--aio can only be specified once"); |
| 572 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 573 | } |
| 574 | seen_aio = true; |
| 575 | if (!strcmp(optarg, "native")) { |
| 576 | flags |= BDRV_O_NATIVE_AIO; |
| 577 | } else if (!strcmp(optarg, "threads")) { |
| 578 | /* this is the default */ |
| 579 | } else { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 580 | error_report("invalid aio mode `%s'", optarg); |
| 581 | exit(EXIT_FAILURE); |
Paolo Bonzini | 39a5235 | 2012-07-18 14:57:15 +0200 | [diff] [blame] | 582 | } |
| 583 | break; |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 584 | case QEMU_NBD_OPT_DISCARD: |
| 585 | if (seen_discard) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 586 | error_report("--discard can only be specified once"); |
| 587 | exit(EXIT_FAILURE); |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 588 | } |
| 589 | seen_discard = true; |
| 590 | if (bdrv_parse_discard_flags(optarg, &flags) == -1) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 591 | error_report("Invalid discard mode `%s'", optarg); |
| 592 | exit(EXIT_FAILURE); |
Paolo Bonzini | ded9d2d | 2013-02-08 14:06:13 +0100 | [diff] [blame] | 593 | } |
| 594 | break; |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 595 | case QEMU_NBD_OPT_DETECT_ZEROES: |
| 596 | detect_zeroes = |
| 597 | qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, |
| 598 | optarg, |
Eric Blake | 7fb1cf1 | 2015-11-18 01:52:57 -0700 | [diff] [blame] | 599 | BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 600 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
| 601 | &local_err); |
| 602 | if (local_err) { |
Markus Armbruster | c29b77f | 2015-12-18 16:35:14 +0100 | [diff] [blame] | 603 | error_reportf_err(local_err, |
| 604 | "Failed to parse detect_zeroes mode: "); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 605 | exit(EXIT_FAILURE); |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 606 | } |
| 607 | if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && |
| 608 | !(flags & BDRV_O_UNMAP)) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 609 | error_report("setting detect-zeroes to unmap is not allowed " |
| 610 | "without setting discard operation to unmap"); |
| 611 | exit(EXIT_FAILURE); |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 612 | } |
| 613 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 614 | case 'b': |
| 615 | bindto = optarg; |
| 616 | break; |
| 617 | case 'p': |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 618 | port = optarg; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 619 | break; |
| 620 | case 'o': |
| 621 | dev_offset = strtoll (optarg, &end, 0); |
| 622 | if (*end) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 623 | error_report("Invalid offset `%s'", optarg); |
| 624 | exit(EXIT_FAILURE); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 625 | } |
| 626 | if (dev_offset < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 627 | error_report("Offset must be positive `%s'", optarg); |
| 628 | exit(EXIT_FAILURE); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 629 | } |
| 630 | break; |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 631 | case 'l': |
| 632 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { |
Markus Armbruster | 70b9433 | 2015-02-13 12:50:26 +0100 | [diff] [blame] | 633 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, |
| 634 | optarg, false); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 635 | if (!sn_opts) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 636 | error_report("Failed in parsing snapshot param `%s'", |
| 637 | optarg); |
| 638 | exit(EXIT_FAILURE); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 639 | } |
| 640 | } else { |
| 641 | sn_id_or_name = optarg; |
| 642 | } |
| 643 | /* fall through */ |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 644 | case 'r': |
Paolo Bonzini | b90fb4b | 2011-09-08 17:24:54 +0200 | [diff] [blame] | 645 | nbdflags |= NBD_FLAG_READ_ONLY; |
Naphtali Sprei | 07108b2 | 2010-03-14 15:19:57 +0200 | [diff] [blame] | 646 | flags &= ~BDRV_O_RDWR; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 647 | break; |
| 648 | case 'P': |
| 649 | partition = strtol(optarg, &end, 0); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 650 | if (*end) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 651 | error_report("Invalid partition `%s'", optarg); |
| 652 | exit(EXIT_FAILURE); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 653 | } |
| 654 | if (partition < 1 || partition > 8) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 655 | error_report("Invalid partition %d", partition); |
| 656 | exit(EXIT_FAILURE); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 657 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 658 | break; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 659 | case 'k': |
Paolo Bonzini | b32f6c2 | 2011-11-04 15:51:20 +0100 | [diff] [blame] | 660 | sockpath = optarg; |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 661 | if (sockpath[0] != '/') { |
Markus Armbruster | 9af9e0f | 2015-12-18 16:35:19 +0100 | [diff] [blame] | 662 | error_report("socket path must be absolute"); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 663 | exit(EXIT_FAILURE); |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 664 | } |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 665 | break; |
| 666 | case 'd': |
| 667 | disconnect = true; |
| 668 | break; |
| 669 | case 'c': |
| 670 | device = optarg; |
| 671 | break; |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 672 | case 'e': |
| 673 | shared = strtol(optarg, &end, 0); |
| 674 | if (*end) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 675 | error_report("Invalid shared device number '%s'", optarg); |
| 676 | exit(EXIT_FAILURE); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 677 | } |
| 678 | if (shared < 1) { |
Markus Armbruster | 9af9e0f | 2015-12-18 16:35:19 +0100 | [diff] [blame] | 679 | error_report("Shared device number must be greater than 0"); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 680 | exit(EXIT_FAILURE); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 681 | } |
| 682 | break; |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 683 | case 'f': |
| 684 | fmt = optarg; |
| 685 | break; |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 686 | case 't': |
| 687 | persistent = 1; |
| 688 | break; |
Daniel P. Berrange | 3d4b2f9 | 2016-02-10 18:41:08 +0000 | [diff] [blame] | 689 | case 'x': |
| 690 | export_name = optarg; |
| 691 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 692 | case 'v': |
| 693 | verbose = 1; |
| 694 | break; |
| 695 | case 'V': |
| 696 | version(argv[0]); |
| 697 | exit(0); |
| 698 | break; |
| 699 | case 'h': |
| 700 | usage(argv[0]); |
| 701 | exit(0); |
| 702 | break; |
| 703 | case '?': |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 704 | error_report("Try `%s --help' for more information.", argv[0]); |
| 705 | exit(EXIT_FAILURE); |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 706 | case QEMU_NBD_OPT_OBJECT: { |
| 707 | QemuOpts *opts; |
| 708 | opts = qemu_opts_parse_noisily(&qemu_object_opts, |
| 709 | optarg, true); |
| 710 | if (!opts) { |
| 711 | exit(EXIT_FAILURE); |
| 712 | } |
| 713 | } break; |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 714 | case QEMU_NBD_OPT_TLSCREDS: |
| 715 | tlscredsid = optarg; |
| 716 | break; |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 717 | case QEMU_NBD_OPT_IMAGE_OPTS: |
| 718 | imageOpts = true; |
| 719 | break; |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 720 | case 'T': |
| 721 | g_free(trace_file); |
| 722 | trace_file = trace_opt_parse(optarg); |
| 723 | break; |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 724 | case QEMU_NBD_OPT_FORK: |
| 725 | fork_process = true; |
| 726 | break; |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 727 | } |
| 728 | } |
| 729 | |
| 730 | if ((argc - optind) != 1) { |
Markus Armbruster | 433672b | 2015-12-18 16:35:24 +0100 | [diff] [blame] | 731 | error_report("Invalid number of arguments"); |
| 732 | error_printf("Try `%s --help' for more information.\n", argv[0]); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 733 | exit(EXIT_FAILURE); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 734 | } |
| 735 | |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 736 | if (qemu_opts_foreach(&qemu_object_opts, |
| 737 | user_creatable_add_opts_foreach, |
Markus Armbruster | 51b9b47 | 2016-04-27 16:29:09 +0200 | [diff] [blame] | 738 | NULL, NULL)) { |
Daniel P. Berrange | 0ab3b33 | 2016-02-10 18:41:00 +0000 | [diff] [blame] | 739 | exit(EXIT_FAILURE); |
| 740 | } |
| 741 | |
Denis V. Lunev | 39ca463 | 2016-06-17 17:44:12 +0300 | [diff] [blame] | 742 | if (!trace_init_backends()) { |
| 743 | exit(1); |
| 744 | } |
| 745 | trace_init_file(trace_file); |
| 746 | qemu_set_log(LOG_TRACE); |
| 747 | |
Daniel P. Berrange | 145614a | 2016-02-10 18:41:13 +0000 | [diff] [blame] | 748 | if (tlscredsid) { |
| 749 | if (sockpath) { |
| 750 | error_report("TLS is only supported with IPv4/IPv6"); |
| 751 | exit(EXIT_FAILURE); |
| 752 | } |
| 753 | if (device) { |
| 754 | error_report("TLS is not supported with a host device"); |
| 755 | exit(EXIT_FAILURE); |
| 756 | } |
| 757 | if (!export_name) { |
| 758 | /* Set the default NBD protocol export name, since |
| 759 | * we *must* use new style protocol for TLS */ |
| 760 | export_name = ""; |
| 761 | } |
| 762 | tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); |
| 763 | if (local_err) { |
| 764 | error_report("Failed to get TLS creds %s", |
| 765 | error_get_pretty(local_err)); |
| 766 | exit(EXIT_FAILURE); |
| 767 | } |
| 768 | } |
| 769 | |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 770 | if (disconnect) { |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 771 | int nbdfd = open(argv[optind], O_RDWR); |
| 772 | if (nbdfd < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 773 | error_report("Cannot open %s: %s", argv[optind], |
| 774 | strerror(errno)); |
| 775 | exit(EXIT_FAILURE); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 776 | } |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 777 | nbd_disconnect(nbdfd); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 778 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 779 | close(nbdfd); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 780 | |
| 781 | printf("%s disconnected\n", argv[optind]); |
| 782 | |
Peter Lieven | 713cc67 | 2014-08-13 19:20:19 +0200 | [diff] [blame] | 783 | return 0; |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 784 | } |
| 785 | |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 786 | if ((device && !verbose) || fork_process) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 787 | int stderr_fd[2]; |
| 788 | pid_t pid; |
| 789 | int ret; |
| 790 | |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 791 | if (qemu_pipe(stderr_fd) < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 792 | error_report("Error setting up communication pipe: %s", |
| 793 | strerror(errno)); |
| 794 | exit(EXIT_FAILURE); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 795 | } |
| 796 | |
| 797 | /* Now daemonize, but keep a communication channel open to |
| 798 | * print errors and exit with the proper status code. |
| 799 | */ |
| 800 | pid = fork(); |
Max Reitz | 70d4739 | 2015-02-25 13:08:22 -0500 | [diff] [blame] | 801 | if (pid < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 802 | error_report("Failed to fork: %s", strerror(errno)); |
| 803 | exit(EXIT_FAILURE); |
Max Reitz | 70d4739 | 2015-02-25 13:08:22 -0500 | [diff] [blame] | 804 | } else if (pid == 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 805 | close(stderr_fd[0]); |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 806 | ret = qemu_daemon(1, 0); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 807 | |
| 808 | /* Temporarily redirect stderr to the parent's pipe... */ |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 809 | old_stderr = dup(STDERR_FILENO); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 810 | dup2(stderr_fd[1], STDERR_FILENO); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 811 | if (ret < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 812 | error_report("Failed to daemonize: %s", strerror(errno)); |
| 813 | exit(EXIT_FAILURE); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 814 | } |
| 815 | |
| 816 | /* ... close the descriptor we inherited and go on. */ |
| 817 | close(stderr_fd[1]); |
| 818 | } else { |
| 819 | bool errors = false; |
| 820 | char *buf; |
| 821 | |
| 822 | /* In the parent. Print error messages from the child until |
| 823 | * it closes the pipe. |
| 824 | */ |
| 825 | close(stderr_fd[1]); |
| 826 | buf = g_malloc(1024); |
| 827 | while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { |
| 828 | errors = true; |
| 829 | ret = qemu_write_full(STDERR_FILENO, buf, ret); |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 830 | if (ret < 0) { |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 831 | exit(EXIT_FAILURE); |
| 832 | } |
| 833 | } |
Paolo Bonzini | fc19f8a | 2012-03-07 11:05:34 +0100 | [diff] [blame] | 834 | if (ret < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 835 | error_report("Cannot read from daemon: %s", |
| 836 | strerror(errno)); |
| 837 | exit(EXIT_FAILURE); |
Paolo Bonzini | c1f8fdc | 2011-11-04 15:51:22 +0100 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | /* Usually the daemon should not print any message. |
| 841 | * Exit with zero status in that case. |
| 842 | */ |
| 843 | exit(errors); |
| 844 | } |
| 845 | } |
| 846 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 847 | if (device != NULL && sockpath == NULL) { |
| 848 | sockpath = g_malloc(128); |
| 849 | snprintf(sockpath, 128, SOCKET_PATH, basename(device)); |
ths | cd831bd | 2008-07-03 10:23:51 +0000 | [diff] [blame] | 850 | } |
| 851 | |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 852 | saddr = nbd_build_socket_address(sockpath, bindto, port); |
| 853 | |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 854 | if (qemu_init_main_loop(&local_err)) { |
Markus Armbruster | 565f65d | 2015-02-12 13:55:05 +0100 | [diff] [blame] | 855 | error_report_err(local_err); |
Chrysostomos Nanakos | 2f78e49 | 2014-09-18 14:30:49 +0300 | [diff] [blame] | 856 | exit(EXIT_FAILURE); |
| 857 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 858 | bdrv_init(); |
| 859 | atexit(bdrv_close_all); |
| 860 | |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 861 | srcpath = argv[optind]; |
| 862 | if (imageOpts) { |
| 863 | QemuOpts *opts; |
| 864 | if (fmt) { |
| 865 | error_report("--image-opts and -f are mutually exclusive"); |
| 866 | exit(EXIT_FAILURE); |
| 867 | } |
| 868 | opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); |
| 869 | if (!opts) { |
| 870 | qemu_opts_reset(&file_opts); |
| 871 | exit(EXIT_FAILURE); |
| 872 | } |
| 873 | options = qemu_opts_to_qdict(opts, NULL); |
| 874 | qemu_opts_reset(&file_opts); |
Max Reitz | efaa7c4 | 2016-03-16 19:54:38 +0100 | [diff] [blame] | 875 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); |
Daniel P. Berrange | 77c9aae | 2016-02-17 10:10:19 +0000 | [diff] [blame] | 876 | } else { |
| 877 | if (fmt) { |
| 878 | options = qdict_new(); |
| 879 | qdict_put(options, "driver", qstring_from_str(fmt)); |
| 880 | } |
Max Reitz | efaa7c4 | 2016-03-16 19:54:38 +0100 | [diff] [blame] | 881 | blk = blk_new_open(srcpath, NULL, options, flags, &local_err); |
Daniel P. Berrange | e6b6367 | 2013-03-19 11:20:20 +0000 | [diff] [blame] | 882 | } |
| 883 | |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 884 | if (!blk) { |
Markus Armbruster | c29b77f | 2015-12-18 16:35:14 +0100 | [diff] [blame] | 885 | error_reportf_err(local_err, "Failed to blk_new_open '%s': ", |
| 886 | argv[optind]); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 887 | exit(EXIT_FAILURE); |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 888 | } |
Max Reitz | 4fbec26 | 2015-02-05 13:58:19 -0500 | [diff] [blame] | 889 | bs = blk_bs(blk); |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 890 | |
Kevin Wolf | 6effd5b | 2016-03-14 11:43:28 +0100 | [diff] [blame] | 891 | blk_set_enable_write_cache(blk, !writethrough); |
| 892 | |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 893 | if (sn_opts) { |
| 894 | ret = bdrv_snapshot_load_tmp(bs, |
| 895 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), |
| 896 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), |
| 897 | &local_err); |
| 898 | } else if (sn_id_or_name) { |
| 899 | ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, |
| 900 | &local_err); |
| 901 | } |
| 902 | if (ret < 0) { |
Markus Armbruster | c29b77f | 2015-12-18 16:35:14 +0100 | [diff] [blame] | 903 | error_reportf_err(local_err, "Failed to load snapshot: "); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 904 | exit(EXIT_FAILURE); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 905 | } |
| 906 | |
Peter Lieven | b3838a4 | 2014-08-13 19:20:18 +0200 | [diff] [blame] | 907 | bs->detect_zeroes = detect_zeroes; |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 908 | fd_size = blk_getlength(blk); |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 909 | if (fd_size < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 910 | error_report("Failed to determine the image length: %s", |
| 911 | strerror(-fd_size)); |
| 912 | exit(EXIT_FAILURE); |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 913 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 914 | |
Tomáš Golembiovský | e424b65 | 2016-10-05 23:40:20 +0200 | [diff] [blame] | 915 | if (dev_offset >= fd_size) { |
| 916 | error_report("Offset (%lld) has to be smaller than the image size " |
| 917 | "(%lld)", |
| 918 | (long long int)dev_offset, (long long int)fd_size); |
| 919 | exit(EXIT_FAILURE); |
| 920 | } |
| 921 | fd_size -= dev_offset; |
| 922 | |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 923 | if (partition != -1) { |
Max Reitz | 4c58e80 | 2014-11-18 12:21:19 +0100 | [diff] [blame] | 924 | ret = find_partition(blk, partition, &dev_offset, &fd_size); |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 925 | if (ret < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 926 | error_report("Could not find partition %d: %s", partition, |
Markus Armbruster | a4699e5 | 2015-12-18 16:35:10 +0100 | [diff] [blame] | 927 | strerror(-ret)); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 928 | exit(EXIT_FAILURE); |
Paolo Bonzini | 185b433 | 2012-03-05 08:56:10 +0100 | [diff] [blame] | 929 | } |
Paolo Bonzini | 802ddc3 | 2011-11-04 15:51:24 +0100 | [diff] [blame] | 930 | } |
| 931 | |
Kevin Wolf | cd7fca9 | 2016-07-06 11:22:39 +0200 | [diff] [blame] | 932 | exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags, nbd_export_closed, |
| 933 | writethrough, NULL, &local_err); |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 934 | if (!exp) { |
Markus Armbruster | 4fffeb5 | 2015-12-18 16:35:05 +0100 | [diff] [blame] | 935 | error_report_err(local_err); |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 936 | exit(EXIT_FAILURE); |
Max Reitz | 98f44bb | 2015-02-25 13:08:21 -0500 | [diff] [blame] | 937 | } |
Daniel P. Berrange | 3d4b2f9 | 2016-02-10 18:41:08 +0000 | [diff] [blame] | 938 | if (export_name) { |
| 939 | nbd_export_set_name(exp, export_name); |
| 940 | newproto = true; |
| 941 | } |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 942 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 943 | server_ioc = qio_channel_socket_new(); |
| 944 | if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { |
| 945 | object_unref(OBJECT(server_ioc)); |
Daniel P. Berrange | 48bec07 | 2015-09-16 14:52:23 +0100 | [diff] [blame] | 946 | error_report_err(local_err); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 947 | return 1; |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 948 | } |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 949 | |
| 950 | if (device) { |
| 951 | int ret; |
| 952 | |
Paolo Bonzini | a6ac231 | 2011-12-06 09:07:00 +0100 | [diff] [blame] | 953 | ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 954 | if (ret != 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 955 | error_report("Failed to create client thread: %s", strerror(ret)); |
| 956 | exit(EXIT_FAILURE); |
Paolo Bonzini | f1ef555 | 2011-11-04 15:51:23 +0100 | [diff] [blame] | 957 | } |
| 958 | } else { |
| 959 | /* Shut up GCC warnings. */ |
| 960 | memset(&client_thread, 0, sizeof(client_thread)); |
| 961 | } |
| 962 | |
Daniel P. Berrange | d0d6ff5 | 2016-02-10 18:41:02 +0000 | [diff] [blame] | 963 | nbd_update_server_watch(); |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 964 | |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 965 | /* now when the initialization is (almost) complete, chdir("/") |
| 966 | * to free any busy filesystems */ |
| 967 | if (chdir("/") < 0) { |
Markus Armbruster | 85b01e0 | 2015-12-18 16:35:04 +0100 | [diff] [blame] | 968 | error_report("Could not chdir to root directory: %s", |
| 969 | strerror(errno)); |
| 970 | exit(EXIT_FAILURE); |
Michael Tokarev | 9faf31b | 2012-01-16 18:37:44 +0400 | [diff] [blame] | 971 | } |
| 972 | |
Max Reitz | ffb31e1 | 2016-09-28 22:46:42 +0200 | [diff] [blame] | 973 | if (fork_process) { |
| 974 | dup2(old_stderr, STDERR_FILENO); |
| 975 | close(old_stderr); |
| 976 | } |
| 977 | |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 978 | state = RUNNING; |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 979 | do { |
Paolo Bonzini | a61c678 | 2011-09-12 17:28:11 +0200 | [diff] [blame] | 980 | main_loop_wait(false); |
Paolo Bonzini | 7860a38 | 2012-09-18 13:31:56 +0200 | [diff] [blame] | 981 | if (state == TERMINATE) { |
| 982 | state = TERMINATING; |
| 983 | nbd_export_close(exp); |
| 984 | nbd_export_put(exp); |
| 985 | exp = NULL; |
| 986 | } |
| 987 | } while (state != TERMINATED); |
ths | 3b05a8e | 2008-07-03 12:45:02 +0000 | [diff] [blame] | 988 | |
Markus Armbruster | 26f54e9 | 2014-10-07 13:59:04 +0200 | [diff] [blame] | 989 | blk_unref(blk); |
Paolo Bonzini | b32f6c2 | 2011-11-04 15:51:20 +0100 | [diff] [blame] | 990 | if (sockpath) { |
| 991 | unlink(sockpath); |
| 992 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 993 | |
Markus Armbruster | fbf28a4 | 2014-09-29 16:07:55 +0200 | [diff] [blame] | 994 | qemu_opts_del(sn_opts); |
Wenchao Xia | 8c116b0 | 2013-12-04 17:10:55 +0800 | [diff] [blame] | 995 | |
Paolo Bonzini | a517e88 | 2011-11-04 15:51:21 +0100 | [diff] [blame] | 996 | if (device) { |
| 997 | void *ret; |
| 998 | pthread_join(client_thread, &ret); |
| 999 | exit(ret != NULL); |
| 1000 | } else { |
| 1001 | exit(EXIT_SUCCESS); |
| 1002 | } |
bellard | 7a5ca86 | 2008-05-27 21:13:40 +0000 | [diff] [blame] | 1003 | } |