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migration: move process_incoming_migration to a coroutine 

The final part of incoming migration, which now consists of
process_incoming_migration for all protocols, is thus made non-blocking.

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-08-07 10:57:43 +02:00
parent 595ab64169
commit 82a4da79fd
1 changed files with 20 additions and 1 deletions
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21
migration.c
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@ -83,11 +83,13 @@ void qemu_start_incoming_migration(const char *uri, Error **errp)
}
}
void process_incoming_migration(QEMUFile *f)
static void process_incoming_migration_co(void *opaque)
{
QEMUFile *f = opaque;
int ret;
ret = qemu_loadvm_state(f);
qemu_set_fd_handler(qemu_get_fd(f), NULL, NULL, NULL);
qemu_fclose(f);
if (ret < 0) {
fprintf(stderr, "load of migration failed\n");
@ -107,6 +109,23 @@ void process_incoming_migration(QEMUFile *f)
}
}
static void enter_migration_coroutine(void *opaque)
{
Coroutine *co = opaque;
qemu_coroutine_enter(co, NULL);
}
void process_incoming_migration(QEMUFile *f)
{
Coroutine *co = qemu_coroutine_create(process_incoming_migration_co);
int fd = qemu_get_fd(f);
assert(fd != -1);
socket_set_nonblock(fd);
qemu_set_fd_handler(fd, enter_migration_coroutine, NULL, co);
qemu_coroutine_enter(co, f);
}
/* amount of nanoseconds we are willing to wait for migration to be down.
* the choice of nanoseconds is because it is the maximum resolution that
* get_clock() can achieve. It is an internal measure. All user-visible