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authorGoldwyn Rodrigues <rgoldwyn@suse.de>2014-01-21 15:48:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-21 16:19:41 -0800
commit66e188fc3173eaeb32d3479758685e34889aff14 (patch)
treea1ce65f346ec0290985dcbff78402d2f03d9edf4 /fs/ocfs2/stack_user.c
parentc74a3bdd9b529d924d1abf986079b783dd105ace (diff)
downloadlinux-66e188fc3173eaeb32d3479758685e34889aff14.tar.bz2
ocfs2: add DLM recovery callbacks
These are the callbacks called by the fs/dlm code in case the membership changes. If there is a failure while/during calling any of these, the DLM creates a new membership and relays to the rest of the nodes. - recover_prep() is called when DLM understands a node is down. - recover_slot() is called once all nodes have acknowledged recover_prep and recovery can begin. - recover_done() is called once the recovery is complete. It returns the new membership. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/stack_user.c')
-rw-r--r--fs/ocfs2/stack_user.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
index 286edf1e231f..4111855a4def 100644
--- a/fs/ocfs2/stack_user.c
+++ b/fs/ocfs2/stack_user.c
@@ -110,6 +110,8 @@
struct ocfs2_live_connection {
struct list_head oc_list;
struct ocfs2_cluster_connection *oc_conn;
+ atomic_t oc_this_node;
+ int oc_our_slot;
};
struct ocfs2_control_private {
@@ -799,6 +801,42 @@ static int fs_protocol_compare(struct ocfs2_protocol_version *existing,
return 0;
}
+static void user_recover_prep(void *arg)
+{
+}
+
+static void user_recover_slot(void *arg, struct dlm_slot *slot)
+{
+ struct ocfs2_cluster_connection *conn = arg;
+ printk(KERN_INFO "ocfs2: Node %d/%d down. Initiating recovery.\n",
+ slot->nodeid, slot->slot);
+ conn->cc_recovery_handler(slot->nodeid, conn->cc_recovery_data);
+
+}
+
+static void user_recover_done(void *arg, struct dlm_slot *slots,
+ int num_slots, int our_slot,
+ uint32_t generation)
+{
+ struct ocfs2_cluster_connection *conn = arg;
+ struct ocfs2_live_connection *lc = conn->cc_private;
+ int i;
+
+ for (i = 0; i < num_slots; i++)
+ if (slots[i].slot == our_slot) {
+ atomic_set(&lc->oc_this_node, slots[i].nodeid);
+ break;
+ }
+
+ lc->oc_our_slot = our_slot;
+}
+
+const struct dlm_lockspace_ops ocfs2_ls_ops = {
+ .recover_prep = user_recover_prep,
+ .recover_slot = user_recover_slot,
+ .recover_done = user_recover_done,
+};
+
static int user_cluster_connect(struct ocfs2_cluster_connection *conn)
{
dlm_lockspace_t *fsdlm;