24 Dec, 2008
1 commit
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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
04 Feb, 2008
1 commit
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* 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
31 Jan, 2008
1 commit
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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
10 Oct, 2007
1 commit
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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
06 Feb, 2007
1 commit
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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
20 Jan, 2006
1 commit
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Signed-off-by: David Teigland
Signed-off-by: Steve Whitehouse
18 Jan, 2006
1 commit
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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