cc6f67bcaf
OpenWRT folks reported that overlayfs fails to mount if upper fs is full, because workdir can't be created. Wordir creation can fail for various other reasons too. There's no reason that the mount itself should fail, overlayfs can work fine without a workdir, as long as the overlay isn't modified. So mount it read-only and don't allow remounting read-write. Add a couple of WARN_ON()s for the impossible case of workdir being used despite being read-only. Reported-by: Bastian Bittorf <bittorf@bluebottle.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: <stable@vger.kernel.org> # v3.18+ |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| copy_up.c | ||
| dir.c | ||
| inode.c | ||
| overlayfs.h | ||
| readdir.c | ||
| super.c | ||