Miklos Szeredi c568d68341 locks: fix file locking on overlayfs ... This patch allows flock, posix locks, ofd locks and leases to work correctly on overlayfs. Instead of using the underlying inode for storing lock context use the overlay inode. This allows locks to be persistent across copy-up. This is done by introducing locks_inode() helper and using it instead of file_inode() to get the inode in locking code. For non-overlayfs the two are equivalent, except for an extra pointer dereference in locks_inode(). Since lock operations are in "struct file_operations" we must also make sure not to call underlying filesystem's lock operations. Introcude a super block flag MS_NOREMOTELOCK to this effect. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Acked-by: Jeff Layton <jlayton@poochiereds.net> Cc: "J. Bruce Fields" <bfields@fieldses.org>		2016-09-16 12:44:20 +02:00
..
copy_up.c	ovl: don't copy up opaqueness	2016-08-08 15:08:49 +02:00
dir.c	ovl: Switch to generic_getxattr	2016-09-01 11:12:00 +02:00
inode.c	ovl: listxattr: use strnlen()	2016-09-01 11:12:00 +02:00
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: Switch to generic_getxattr	2016-09-01 11:12:00 +02:00
readdir.c	ovl: proper cleanup of workdir	2016-09-01 11:11:59 +02:00
super.c	locks: fix file locking on overlayfs	2016-09-16 12:44:20 +02:00