msi: Fix copy&paste mistake in msi_uninit
[qemu.git] / migration-fd.c
blob66d51c1cc0a242d8cef4010e9161a3e01b90b9ed
1 /*
2 * QEMU live migration via generic fd
4 * Copyright Red Hat, Inc. 2009
6 * Authors:
7 * Chris Lalancette <clalance@redhat.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.
14 #include "qemu-common.h"
15 #include "qemu_socket.h"
16 #include "migration.h"
17 #include "monitor.h"
18 #include "qemu-char.h"
19 #include "buffered_file.h"
20 #include "block.h"
21 #include "qemu_socket.h"
23 //#define DEBUG_MIGRATION_FD
25 #ifdef DEBUG_MIGRATION_FD
26 #define DPRINTF(fmt, ...) \
27 do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
28 #else
29 #define DPRINTF(fmt, ...) \
30 do { } while (0)
31 #endif
33 static int fd_errno(FdMigrationState *s)
35 return errno;
38 static int fd_write(FdMigrationState *s, const void * buf, size_t size)
40 return write(s->fd, buf, size);
43 static int fd_close(FdMigrationState *s)
45 DPRINTF("fd_close\n");
46 if (s->fd != -1) {
47 close(s->fd);
48 s->fd = -1;
50 return 0;
53 MigrationState *fd_start_outgoing_migration(Monitor *mon,
54 const char *fdname,
55 int64_t bandwidth_limit,
56 int detach,
57 int blk,
58 int inc)
60 FdMigrationState *s;
62 s = qemu_mallocz(sizeof(*s));
64 s->fd = monitor_get_fd(mon, fdname);
65 if (s->fd == -1) {
66 DPRINTF("fd_migration: invalid file descriptor identifier\n");
67 goto err_after_alloc;
70 if (fcntl(s->fd, F_SETFL, O_NONBLOCK) == -1) {
71 DPRINTF("Unable to set nonblocking mode on file descriptor\n");
72 goto err_after_open;
75 s->get_error = fd_errno;
76 s->write = fd_write;
77 s->close = fd_close;
78 s->mig_state.cancel = migrate_fd_cancel;
79 s->mig_state.get_status = migrate_fd_get_status;
80 s->mig_state.release = migrate_fd_release;
82 s->mig_state.blk = blk;
83 s->mig_state.shared = inc;
85 s->state = MIG_STATE_ACTIVE;
86 s->mon = NULL;
87 s->bandwidth_limit = bandwidth_limit;
89 if (!detach) {
90 migrate_fd_monitor_suspend(s, mon);
93 migrate_fd_connect(s);
94 return &s->mig_state;
96 err_after_open:
97 close(s->fd);
98 err_after_alloc:
99 qemu_free(s);
100 return NULL;
103 static void fd_accept_incoming_migration(void *opaque)
105 QEMUFile *f = opaque;
107 process_incoming_migration(f);
108 qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, NULL, NULL, NULL);
109 qemu_fclose(f);
112 int fd_start_incoming_migration(const char *infd)
114 int fd;
115 QEMUFile *f;
117 DPRINTF("Attempting to start an incoming migration via fd\n");
119 fd = strtol(infd, NULL, 0);
120 f = qemu_fdopen(fd, "rb");
121 if(f == NULL) {
122 DPRINTF("Unable to apply qemu wrapper to file descriptor\n");
123 return -errno;
126 qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL, f);
128 return 0;