lxc: fix lxc-destroy

Signed-off-by: Luka Perkov <luka@openwrt.org>

utils/lxc/patches/300-fix-lxc-destroy.patch

@@ -0,0 +1,48 @@
+From bdeafb7bc4857e80dbca5192a751eedcf7b69abd Mon Sep 17 00:00:00 2001
+From: Luka Perkov <luka@openwrt.org>
+Date: Mon, 27 Oct 2014 21:49:46 +0100
+Subject: [PATCH] utils: remove unnecessary check of mystat.st_dev
+
+The check is not needed and it breaks lxc-destroy when container is installed
+on top of overlayfs. More information why this is a problem on overlayfs can be
+found here:
+
+https://kernel.googlesource.com/pub/scm/linux/kernel/git/mszeredi/vfs/+/overlayfs.current/Documentation/filesystems/overlayfs.txt
+
+Signed-off-by: Luka Perkov <luka@openwrt.org>
+---
+ src/lxc/utils.c | 10 ++++------
+ 1 file changed, 4 insertions(+), 6 deletions(-)
+
+--- a/src/lxc/utils.c
++++ b/src/lxc/utils.c
+@@ -46,7 +46,7 @@
+ 
+ lxc_log_define(lxc_utils, lxc);
+ 
+-static int _recursive_rmdir_onedev(char *dirname, dev_t pdev)
++static int _recursive_rmdir_onedev(char *dirname)
+ {
+ 	struct dirent dirent, *direntp;
+ 	DIR *dir;
+@@ -82,10 +82,8 @@ static int _recursive_rmdir_onedev(char
+ 			failed=1;
+ 			continue;
+ 		}
+-		if (mystat.st_dev != pdev)
+-			continue;
+ 		if (S_ISDIR(mystat.st_mode)) {
+-			if (_recursive_rmdir_onedev(pathname, pdev) < 0)
++			if (_recursive_rmdir_onedev(pathname) < 0)
+ 				failed=1;
+ 		} else {
+ 			if (unlink(pathname) < 0) {
+@@ -119,7 +117,7 @@ extern int lxc_rmdir_onedev(char *path)
+ 		return -1;
+ 	}
+ 
+-	return _recursive_rmdir_onedev(path, mystat.st_dev);
++	return _recursive_rmdir_onedev(path);
+ }
+ 
+ static int mount_fs(const char *source, const char *target, const char *type)