target-i386: Update CPUID feature set for TCG
[qemu.git] / migration-fd.c
blobef7edbc5ecb01dc1e0e9d24521d4bc80785574be
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 "sysemu.h"
20 #include "buffered_file.h"
21 #include "block.h"
22 #include "qemu_socket.h"
24 //#define DEBUG_MIGRATION_FD
26 #ifdef DEBUG_MIGRATION_FD
27 #define dprintf(fmt, ...) \
28 do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
29 #else
30 #define dprintf(fmt, ...) \
31 do { } while (0)
32 #endif
34 static int fd_errno(FdMigrationState *s)
36 return errno;
39 static int fd_write(FdMigrationState *s, const void * buf, size_t size)
41 return write(s->fd, buf, size);
44 static int fd_close(FdMigrationState *s)
46 dprintf("fd_close\n");
47 if (s->fd != -1) {
48 close(s->fd);
49 s->fd = -1;
51 return 0;
54 MigrationState *fd_start_outgoing_migration(Monitor *mon,
55 const char *fdname,
56 int64_t bandwidth_limit,
57 int detach,
58 int blk,
59 int inc)
61 FdMigrationState *s;
63 s = qemu_mallocz(sizeof(*s));
65 s->fd = monitor_get_fd(mon, fdname);
66 if (s->fd == -1) {
67 dprintf("fd_migration: invalid file descriptor identifier\n");
68 goto err_after_alloc;
71 if (fcntl(s->fd, F_SETFL, O_NONBLOCK) == -1) {
72 dprintf("Unable to set nonblocking mode on file descriptor\n");
73 goto err_after_open;
76 s->get_error = fd_errno;
77 s->write = fd_write;
78 s->close = fd_close;
79 s->mig_state.cancel = migrate_fd_cancel;
80 s->mig_state.get_status = migrate_fd_get_status;
81 s->mig_state.release = migrate_fd_release;
83 s->mig_state.blk = blk;
84 s->mig_state.shared = inc;
86 s->state = MIG_STATE_ACTIVE;
87 s->mon = NULL;
88 s->bandwidth_limit = bandwidth_limit;
90 if (!detach) {
91 migrate_fd_monitor_suspend(s, mon);
94 migrate_fd_connect(s);
95 return &s->mig_state;
97 err_after_open:
98 close(s->fd);
99 err_after_alloc:
100 qemu_free(s);
101 return NULL;
104 static void fd_accept_incoming_migration(void *opaque)
106 QEMUFile *f = opaque;
107 int ret;
109 ret = qemu_loadvm_state(f);
110 if (ret < 0) {
111 fprintf(stderr, "load of migration failed\n");
112 goto err;
114 qemu_announce_self();
115 dprintf("successfully loaded vm state\n");
116 /* we've successfully migrated, close the fd */
117 qemu_set_fd_handler2(qemu_stdio_fd(f), NULL, NULL, NULL, NULL);
118 if (autostart)
119 vm_start();
121 err:
122 qemu_fclose(f);
125 int fd_start_incoming_migration(const char *infd)
127 int fd;
128 QEMUFile *f;
130 dprintf("Attempting to start an incoming migration via fd\n");
132 fd = strtol(infd, NULL, 0);
133 f = qemu_fdopen(fd, "rb");
134 if(f == NULL) {
135 dprintf("Unable to apply qemu wrapper to file descriptor\n");
136 return -errno;
139 qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL,
140 (void *)(unsigned long)f);
142 return 0;