Amir Goldstein 2cac0c00a6 ovl: get exclusive ownership on upper/work dirs ... Bad things can happen if several concurrent overlay mounts try to use the same upperdir/workdir path. Try to get the 'inuse' advisory lock on upperdir and workdir. Fail mount if another overlay mount instance or another user holds the 'inuse' lock on these directories. Note that this provides no protection for concurrent overlay mount that use overlapping (i.e. descendant) upper/work dirs. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>		2017-07-04 22:03:17 +02:00
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copy_up.c	ovl: move __upperdentry to ovl_inode	2017-07-04 22:03:16 +02:00
dir.c	ovl: move __upperdentry to ovl_inode	2017-07-04 22:03:16 +02:00
inode.c	ovl: move impure to ovl_inode	2017-07-04 22:03:16 +02:00
Kconfig	ovl: select EXPORTFS	2017-05-15 10:53:07 +02:00
Makefile	ovl: split super.c	2016-12-16 11:02:56 +01:00
namei.c	ovl: move impure to ovl_inode	2017-07-04 22:03:16 +02:00
overlayfs.h	vfs: introduce inode 'inuse' lock	2017-07-04 22:03:16 +02:00
ovl_entry.h	ovl: get exclusive ownership on upper/work dirs	2017-07-04 22:03:17 +02:00
readdir.c	ovl: proper cleanup of workdir	2016-09-01 11:11:59 +02:00
super.c	ovl: get exclusive ownership on upper/work dirs	2017-07-04 22:03:17 +02:00
util.c	vfs: introduce inode 'inuse' lock	2017-07-04 22:03:16 +02:00