cr-dump: discover fs type in fill_fd_params_special

FS type is required to distinguish between local files and remove ones, which
will be restored via SPFS and thus has to be created first.
Signed-off-by: Stanislav Kinsburskiy <skinsbursky@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/cr-dump.c

@@ -215,6 +215,8 @@ static int collect_fds(pid_t pid, struct parasite_drain_fd **dfds)
 
 static int fill_fd_params_special(int fd, struct fd_parms *p)
 {
+	struct statfs fst;
+
 	*p = FD_PARMS_INIT;
 
 	if (fstat(fd, &p->stat) < 0) {
@@ -225,6 +227,13 @@ static int fill_fd_params_special(int fd, struct fd_parms *p)
 	if (get_fd_mntid(fd, &p->mnt_id))
 		return -1;
 
+	if (fstatfs(fd, &fst)) {
+		pr_perror("Unable to statfs fd %d", fd);
+		return -1;
+	}
+
+	p->fs_type = fst.f_type;
+
 	return 0;
 }