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migration: use QEMUFile for migration channel lifetime

Browse source 
As a start, use QEMUFile to store the destination and close it.
qemu_get_fd gets a file descriptor that will be used by the write
callbacks.

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-02-22 17:36:41 +01:00 • committed by Juan Quintela
parent 3f2d38faab
commit f8bbc12863
7 changed files with 21 additions and 89 deletions
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35
migration-fd.c
View file

@ -40,45 +40,16 @@ static int fd_write(MigrationState *s, const void * buf, size_t size)
return write(s->fd, buf, size);
}
static int fd_close(MigrationState *s)
{
struct stat st;
int ret;
DPRINTF("fd_close\n");
ret = fstat(s->fd, &st);
if (ret == 0 && S_ISREG(st.st_mode)) {
/*
* If the file handle is a regular file make sure the
* data is flushed to disk before signaling success.
*/
ret = fsync(s->fd);
if (ret != 0) {
ret = -errno;
perror("migration-fd: fsync");
return ret;
}
}
ret = close(s->fd);
s->fd = -1;
if (ret != 0) {
ret = -errno;
perror("migration-fd: close");
}
return ret;
}
void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
{
s->fd = monitor_get_fd(cur_mon, fdname, errp);
if (s->fd == -1) {
int fd = monitor_get_fd(cur_mon, fdname, errp);
if (fd == -1) {
return;
}
s->migration_file = qemu_fdopen(fd, "wb");
s->get_error = fd_errno;
s->write = fd_write;
s->close = fd_close;
migrate_fd_connect(s);
}