qemu-log: Add new log category for guest bugs
[qemu/pbrook.git] / migration-tcp.c
bloba15c2b87a10e2a93bc892d27c0841e744565fec5
1 /*
2 * QEMU live migration
4 * Copyright IBM, Corp. 2008
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
16 #include "qemu-common.h"
17 #include "qemu_socket.h"
18 #include "migration.h"
19 #include "qemu-char.h"
20 #include "buffered_file.h"
21 #include "block.h"
23 //#define DEBUG_MIGRATION_TCP
25 #ifdef DEBUG_MIGRATION_TCP
26 #define DPRINTF(fmt, ...) \
27 do { printf("migration-tcp: " fmt, ## __VA_ARGS__); } while (0)
28 #else
29 #define DPRINTF(fmt, ...) \
30 do { } while (0)
31 #endif
33 static int socket_errno(MigrationState *s)
35 return socket_error();
38 static int socket_write(MigrationState *s, const void * buf, size_t size)
40 return send(s->fd, buf, size, 0);
43 static int tcp_close(MigrationState *s)
45 int r = 0;
46 DPRINTF("tcp_close\n");
47 if (s->fd != -1) {
48 if (close(s->fd) < 0) {
49 r = -errno;
51 s->fd = -1;
53 return r;
56 static void tcp_wait_for_connect(int fd, void *opaque)
58 MigrationState *s = opaque;
60 if (fd < 0) {
61 DPRINTF("migrate connect error\n");
62 s->fd = -1;
63 migrate_fd_error(s);
64 } else {
65 DPRINTF("migrate connect success\n");
66 s->fd = fd;
67 migrate_fd_connect(s);
71 int tcp_start_outgoing_migration(MigrationState *s, const char *host_port,
72 Error **errp)
74 s->get_error = socket_errno;
75 s->write = socket_write;
76 s->close = tcp_close;
78 s->fd = inet_nonblocking_connect(host_port, tcp_wait_for_connect, s,
79 errp);
80 if (error_is_set(errp)) {
81 migrate_fd_error(s);
82 return -1;
85 return 0;
88 static void tcp_accept_incoming_migration(void *opaque)
90 struct sockaddr_in addr;
91 socklen_t addrlen = sizeof(addr);
92 int s = (intptr_t)opaque;
93 QEMUFile *f;
94 int c;
96 do {
97 c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
98 } while (c == -1 && socket_error() == EINTR);
100 DPRINTF("accepted migration\n");
102 if (c == -1) {
103 fprintf(stderr, "could not accept migration connection\n");
104 goto out2;
107 f = qemu_fopen_socket(c);
108 if (f == NULL) {
109 fprintf(stderr, "could not qemu_fopen socket\n");
110 goto out;
113 process_incoming_migration(f);
114 qemu_fclose(f);
115 out:
116 close(c);
117 out2:
118 qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
119 close(s);
122 int tcp_start_incoming_migration(const char *host_port, Error **errp)
124 int s;
126 s = inet_listen(host_port, NULL, 256, SOCK_STREAM, 0, errp);
128 if (s < 0) {
129 return -1;
132 qemu_set_fd_handler2(s, NULL, tcp_accept_incoming_migration, NULL,
133 (void *)(intptr_t)s);
135 return 0;