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authorAlexander Aring <aahringo@redhat.com>2022-11-18 01:11:50 +0300
committerDavid Teigland <teigland@redhat.com>2022-11-21 18:45:49 +0300
commit4f567acb0b8622fe265aac4b0037a03ef544ba24 (patch)
tree313655472247acade18b5a7c89295d25dcc9a939 /fs/dlm/lowcomms.h
parent1037c2a94ab51997d8b1ef9e7f6ed697e6e17d84 (diff)
downloadlinux-4f567acb0b8622fe265aac4b0037a03ef544ba24.tar.xz
fs: dlm: remove socket shutdown handling
Since commit 489d8e559c65 ("fs: dlm: add reliable connection if reconnect") we have functionality like TCP offers for half-closed sockets on dlm application protocol layer. This feature is required because the cluster manager events about leaving resource memberships can be locally already occurred but other cluster nodes having a pending leaving membership over the cluster manager protocol happening. In this time the local dlm node already shutdown it's connection and don't transmit anymore any new dlm messages, but however it still needs to be able to accept dlm messages because the pending leave membership request of the cluster manager protocol which the dlm kernel implementation has no control about it. We have this functionality on the application for two reasons, the main reason is that SCTP does not support such functionality on socket layer. But we can do it inside application layer. Another small issue is that this feature is broken in the TCP world because some NAT devices does not implement such functionality correctly. This is the same reason why the reliable connection session layer in DLM exists. We give up on middle devices in the networking which sends e.g. TCP resets out. In DLM we cannot have any message dropping and we ensure it over a session layer that it can't happen. Back to the half-closed grace shutdown handling. It's not necessary anymore to do it on socket layer (which is only support for TCP sockets) because we do it on application layer. This patch removes this handling, if there are still issues then we have a problem on the application layer for such handling. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/lowcomms.h')
-rw-r--r--fs/dlm/lowcomms.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/dlm/lowcomms.h b/fs/dlm/lowcomms.h
index acaf1b0b3885..3e8dca66183b 100644
--- a/fs/dlm/lowcomms.h
+++ b/fs/dlm/lowcomms.h
@@ -34,6 +34,7 @@ bool dlm_lowcomms_is_running(void);
int dlm_lowcomms_start(void);
void dlm_lowcomms_shutdown(void);
+void dlm_lowcomms_shutdown_node(int nodeid, bool force);
void dlm_lowcomms_stop(void);
void dlm_lowcomms_init(void);
void dlm_lowcomms_exit(void);