diff options
Diffstat (limited to 'tools/busybox-patches/unionfs-run-init.diff')
| -rw-r--r-- | tools/busybox-patches/unionfs-run-init.diff | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/busybox-patches/unionfs-run-init.diff b/tools/busybox-patches/unionfs-run-init.diff new file mode 100644 index 00000000..2163fa98 --- /dev/null +++ b/tools/busybox-patches/unionfs-run-init.diff @@ -0,0 +1,20 @@ +If we find the special directory, /rorootfs move the mount point of the later +root fs on top. We check if we have unionfs available to make the ro fs rw. +Unfortunately the unionfs code is incomplete (mmap issue). Thus the original +mount point of the ro fs part is not moved accordingly. + +Index: busybox-1.2.2/util-linux/switch_root.c +=================================================================== +--- busybox-1.2.2.orig/util-linux/switch_root.c ++++ busybox-1.2.2/util-linux/switch_root.c +@@ -106,6 +106,10 @@ int switch_root_main(int argc, char *arg + // Overmount / with newdir and chroot into it. The chdir is needed to + // recalculate "." and ".." links. + ++ if ( !lstat("/rorootfs", &st1 ) ) ++ if ( mount("/rorootfs", "/", NULL, MS_MOVE, NULL) ) ++ bb_error_msg_and_die("moving rorootfs"); ++ + if (mount(".", "/", NULL, MS_MOVE, NULL) || chroot(".") || chdir("/")) + bb_error_msg_and_die("moving root"); + |