From c994c2ebdbbc391a42f177c8eb7882ebf3f142d8 Mon Sep 17 00:00:00 2001 From: Goldwyn Rodrigues Date: Tue, 21 Jan 2014 15:48:32 -0800 Subject: [PATCH] ocfs2: use the new DLM operation callbacks while requesting new lockspace Attempt to use the new DLM operations. If it is not supported, use the traditional ocfs2_controld. To exchange ocfs2 versioning, we use the LVB of the version dlm lock. It first attempts to take the lock in EX mode (non-blocking). If successful (which means it is the first mount), it writes the version number and downconverts to PR lock. If it is unsuccessful, it reads the version from the lock. If this becomes the standard (with o2cb as well), it could simplify userspace tools to check if the filesystem is mounted on other nodes. Dan: Since ocfs2_protocol_version are two u8 values, the additional checks with LONG* don't make sense. Signed-off-by: Goldwyn Rodrigues Signed-off-by: Dan Carpenter Reviewed-by: Mark Fasheh Cc: Joel Becker Cc: Dan Carpenter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-format-patch failed