Miklos Szeredi cc6f67bcaf ovl: mount read-only if workdir can't be created ... 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+		2015-05-19 14:30:12 +02:00
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copy_up.c	ovl: mount read-only if workdir can't be created	2015-05-19 14:30:12 +02:00
dir.c	ovl: mount read-only if workdir can't be created	2015-05-19 14:30:12 +02:00
inode.c	ovl: Use macros to present ovl_xattr	2014-12-13 00:59:52 +01:00
Kconfig	ovl: rename filesystem type to "overlay"	2014-11-20 16:39:59 +01:00
Makefile	ovl: rename filesystem type to "overlay"	2014-11-20 16:39:59 +01:00
overlayfs.h	ovl: Use macros to present ovl_xattr	2014-12-13 00:59:52 +01:00
readdir.c	Merge branch 'overlayfs-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs into for-next	2015-02-20 04:58:52 -05:00
super.c	ovl: mount read-only if workdir can't be created	2015-05-19 14:30:12 +02:00