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| author | Sunil Mushran <sunil.mushran@oracle.com> | 2011-05-19 14:34:11 -0700 |
|---|---|---|
| committer | Joel Becker <jlbec@evilplan.org> | 2011-05-25 21:05:15 -0700 |
| commit | bddefdeec5bc56ba5aa2c2ca8c904cdff58e7e5b (patch) | |
| tree | ec3a61ccfd5bba4d5fba55b6aa9844d3dfa25d78 /fs/ocfs2/dlm/dlmcommon.h | |
| parent | 98ba073c606fba7a48a8e0d36e3b02105d31c768 (diff) | |
| download | blackbird-op-linux-bddefdeec5bc56ba5aa2c2ca8c904cdff58e7e5b.tar.gz blackbird-op-linux-bddefdeec5bc56ba5aa2c2ca8c904cdff58e7e5b.zip | |
ocfs2/dlm: Add new dlm message DLM_BEGIN_EXIT_DOMAIN_MSG
This patch adds a new dlm message DLM_BEGIN_EXIT_DOMAIN_MSG and ups the dlm
protocol to 1.2.
o2dlm sends this new message in dlm_unregister_domain() to mark the beginning
of the exit domain. This message is sent to all nodes in the domain.
Currently o2dlm has no way of informing other nodes of its impending exit.
This information is useful as the other nodes could disregard the exiting
node in certain operations. For example, in resource migration. If two or
more nodes were umounting in parallel, it would be more efficient if o2dlm
were to choose a non-exiting node to be the new master node rather than an
exiting one.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
Diffstat (limited to 'fs/ocfs2/dlm/dlmcommon.h')
| -rw-r--r-- | fs/ocfs2/dlm/dlmcommon.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index 1aac42a29745..d602abb51b61 100644 --- a/fs/ocfs2/dlm/dlmcommon.h +++ b/fs/ocfs2/dlm/dlmcommon.h @@ -144,6 +144,7 @@ struct dlm_ctxt wait_queue_head_t dlm_join_events; unsigned long live_nodes_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; unsigned long domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; + unsigned long exit_domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; unsigned long recovery_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; struct dlm_recovery_ctxt reco; spinlock_t master_lock; @@ -460,6 +461,7 @@ enum { DLM_FINALIZE_RECO_MSG = 518, DLM_QUERY_REGION = 519, DLM_QUERY_NODEINFO = 520, + DLM_BEGIN_EXIT_DOMAIN_MSG = 521, }; struct dlm_reco_node_data |
