Check only rootfs as filesystem type

When detecting if rootfs is on ramfs instead of checking "- rootfs rootfs" which is the " - <file_system> <device>" information only check the file system type. This is due to a change introduced in kernel where ramfs file system doesn't set the device to "rootfs" but instead mark it as "none". By making sure we only check for "rootfs" as the file system name we also offer backward compatibility with earlier kernels as well. The kernel commit that introduced this change was commit f32356261d44d580649a7abce1156d15d49cf20f Author: David Howells <dhowells@redhat.com> Date: Mon Mar 25 16:38:31 2019 +0000 vfs: Convert ramfs, shmem, tmpfs, devtmpfs, rootfs to use the new mount API Signed-off-by: Pranay Kr. Srivastava <pranay.srivastava@pantacor.com>

Check only rootfs as filesystem type
97edebfa · Pranay Kr. Srivastava · c22a1a4a · 97edebfa
Commit 97edebfa authored Aug 24, 2020 by Pranay Kr. Srivastava
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utils.c src/lxc/utils.c +1 -1

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--- a/src/lxc/utils.c
+++ b/src/lxc/utils.c
@@ -704,7 +704,7 @@ bool detect_ramfs_rootfs(void)
 		if (strcmp(p + 1, "/") == 0) {
 			/* This is '/'. Is it the ramfs? */
 			p = strchr(p2 + 1, '-');
-			if (p && strncmp(p, "- rootfs rootfs ", 16) == 0)
+			if (p && strncmp(p, "- rootfs ", 9) == 0)
 				return true;
 		}
 	}