Skip rootfs pinning for read-only file system.

Signed-off-by: Wei Mingzhi <weimingzhi@baidu.com>

Skip rootfs pinning for read-only file system.
e859a5ee · Wei Mingzhi · 73936a0d · e859a5ee
Commit e859a5ee authored May 18, 2021 by Wei Mingzhi
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conf.c src/lxc/conf.c +5 -1

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--- a/src/lxc/conf.c
+++ b/src/lxc/conf.c
@@ -573,8 +573,12 @@ int lxc_rootfs_init(struct lxc_conf *conf, bool userns)
 			 PROTECT_OPEN | O_CREAT,
 			 PROTECT_LOOKUP_BENEATH,
 			 S_IWUSR | S_IRUSR);
-	if (fd_pin < 0)
+	if (fd_pin < 0) {
+		if (errno == EROFS) {
+			return log_trace_errno(0, EROFS, "Not pinning on read-only filesystem");
+		}
 		return syserror("Failed to pin rootfs");
+	}
 	TRACE("Pinned rootfs %d(.lxc_keep)", fd_pin);