4 * Copyright IBM, Corp. 2008
5 * Copyright Dell MessageOne 2008
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Charles Duffy <charles_duffy@messageone.com>
11 * This work is licensed under the terms of the GNU GPL, version 2. See
12 * the COPYING file in the top-level directory.
16 #include "qemu-common.h"
17 #include "qemu_socket.h"
18 #include "migration.h"
19 #include "qemu-char.h"
22 #include "buffered_file.h"
25 //#define DEBUG_MIGRATION_EXEC
27 #ifdef DEBUG_MIGRATION_EXEC
28 #define dprintf(fmt, ...) \
29 do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0)
31 #define dprintf(fmt, ...) \
35 static int file_errno(FdMigrationState *s)
40 static int file_write(FdMigrationState *s, const void * buf, size_t size)
42 return write(s->fd, buf, size);
45 static int exec_close(FdMigrationState *s)
47 dprintf("exec_close\n");
49 qemu_fclose(s->opaque);
56 MigrationState *exec_start_outgoing_migration(const char *command,
57 int64_t bandwidth_limit,
63 s = qemu_mallocz(sizeof(*s));
65 f = popen(command, "w");
67 dprintf("Unable to popen exec target\n");
73 dprintf("Unable to retrieve file descriptor for popen'd handle\n");
77 if (fcntl(s->fd, F_SETFD, O_NONBLOCK) == -1) {
78 dprintf("Unable to set nonblocking mode on file descriptor\n");
82 s->opaque = qemu_popen(f, "w");
84 s->close = exec_close;
85 s->get_error = file_errno;
86 s->write = file_write;
87 s->mig_state.cancel = migrate_fd_cancel;
88 s->mig_state.get_status = migrate_fd_get_status;
89 s->mig_state.release = migrate_fd_release;
91 s->state = MIG_STATE_ACTIVE;
93 s->bandwidth_limit = bandwidth_limit;
96 dprintf("detaching from monitor\n");
101 migrate_fd_connect(s);
102 return &s->mig_state;
111 int exec_start_incoming_migration(const char *command)
116 dprintf("Attempting to start an incoming migration\n");
117 f = qemu_popen_cmd(command, "r");
119 dprintf("Unable to apply qemu wrapper to popen file\n");
122 vm_stop(0); /* just in case */
123 ret = qemu_loadvm_state(f);
125 fprintf(stderr, "load of migration failed\n");
128 qemu_announce_self();
129 dprintf("successfully loaded vm state\n");