user/sven/linux.git/fs/dlm/midcomms.c, branch v3.2.86

dlm: fix up memory allocation flags

2008-12-23T16:15:40Z

Use ls_allocation for memory allocations, which a cluster fs sets to GFP_NOFS. Use GFP_NOFS for allocations when no lockspace struct is available. Taking dlm locks needs to avoid calling back into the cluster fs because write-out can require taking dlm locks. Cc: Christine Caulfield Signed-off-by: Steven Whitehouse Signed-off-by: David Teigland

dlm: dlm_process_incoming_buffer() fixes

2008-02-04T07:22:42Z

* check that length is large enough to cover the non-variable part of message or rcom resp. (after checking that it's large enough to cover the header, of course). * kill more pointless casts Signed-off-by: Al Viro Signed-off-by: David Teigland

dlm: align midcomms message buffer

2008-01-30T17:04:25Z

gcc does not guarantee that an auto buffer is 64bit aligned. This change allows sparc64 to work. Signed-off-by: Fabio M. Di Nitto Signed-off-by: David Teigland

[DLM] block dlm_recv in recovery transition

2007-10-10T07:56:38Z

Introduce a per-lockspace rwsem that's held in read mode by dlm_recv threads while working in the dlm. This allows dlm_recv activity to be suspended when the lockspace transitions to, from and between recovery cycles. The specific bug prompting this change is one where an in-progress recovery cycle is aborted by a new recovery cycle. While dlm_recv was processing a recovery message, the recovery cycle was aborted and dlm_recoverd began cleaning up. dlm_recv decremented recover_locks_count on an rsb after dlm_recoverd had reset it to zero. This is fixed by suspending dlm_recv (taking write lock on the rwsem) before aborting the current recovery. The transitions to/from normal and recovery modes are simplified by using this new ability to block dlm_recv. The switch from normal to recovery mode means dlm_recv goes from processing locking messages, to saving them for later, and vice versa. Races are avoided by blocking dlm_recv when setting the flag that switches between modes. Signed-off-by: David Teigland Signed-off-by: Steven Whitehouse

[DLM] rename dlm_config_info fields

2007-02-05T18:36:37Z

Add a "ci_" prefix to the fields in the dlm_config_info struct so that we can use macros to add configfs functions to access them (in a later patch). No functional changes in this patch, just naming changes. Signed-off-by: David Teigland Signed-off-by: Steven Whitehouse

[DLM] Update DLM to the latest patch level

2006-01-20T08:47:07Z

Signed-off-by: David Teigland Signed-off-by: Steve Whitehouse

[DLM] The core of the DLM for GFS2/CLVM

2006-01-18T09:30:29Z

This is the core of the distributed lock manager which is required to use GFS2 as a cluster filesystem. It is also used by CLVM and can be used as a standalone lock manager independantly of either of these two projects. It implements VAX-style locking modes. Signed-off-by: David Teigland Signed-off-by: Steve Whitehouse