[DLM] PATCH 2/3 dlm: lowcomms close

When a node is removed from a lockspace configuration, close our
connection to it, clearing any remaining messages for it.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

4 files changed, 24 insertions, 1 deletions

diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 87df9616415e..88553054bbfa 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -17,6 +17,7 @@
 #include <net/sock.h>
 
 #include "config.h"
+#include "lowcomms.h"
 
 /*
  * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
@@ -429,6 +430,7 @@ static void drop_comm(struct config_group *g, struct config_item *i)
         struct comm *cm = to_comm(i);
         if (local_comm == cm)
                 local_comm = NULL;
+        dlm_lowcomms_close(cm->nodeid);
         while (cm->addr_count--)
                 kfree(cm->addr[cm->addr_count]);
         config_item_put(i);
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 09b0124f7fc4..cdd168e4bf45 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1063,6 +1063,27 @@ static void dealloc_nodeinfo(void)
         }
 }
 
+int dlm_lowcomms_close(int nodeid)
+{
+        struct nodeinfo *ni;
+
+        ni = nodeid2nodeinfo(nodeid, 0);
+        if (!ni)
+                return -1;
+
+        spin_lock(&ni->lock);
+        if (ni->assoc_id) {
+                ni->assoc_id = 0;
+                /* Don't send shutdown here, sctp will just queue it
+                   till the node comes back up! */
+        }
+        spin_unlock(&ni->lock);
+
+        clean_one_writequeue(ni);
+        clear_bit(NI_INIT_PENDING, &ni->flags);
+        return 0;
+}
+
 static int write_list_empty(void)
 {
         int status;
diff --git a/fs/dlm/lowcomms.h b/fs/dlm/lowcomms.h
index 3af8035ff12f..6c04bb09cfa8 100644
--- a/fs/dlm/lowcomms.h
+++ b/fs/dlm/lowcomms.h
@@ -18,6 +18,7 @@ int dlm_lowcomms_init(void);
 void dlm_lowcomms_exit(void);
 int dlm_lowcomms_start(void);
 void dlm_lowcomms_stop(void);
+int dlm_lowcomms_close(int nodeid);
 void *dlm_lowcomms_get_buffer(int nodeid, int len, int allocation, char **ppc);
 void dlm_lowcomms_commit_buffer(void *mh);
 
diff --git a/fs/dlm/member.c b/fs/dlm/member.c
index 926cd0cb6bff..cd0c51e724e0 100644
--- a/fs/dlm/member.c
+++ b/fs/dlm/member.c
@@ -15,7 +15,6 @@
 #include "member.h"
 #include "recoverd.h"
 #include "recover.h"
-#include "lowcomms.h"
 #include "rcom.h"
 #include "config.h"