dlm: recover nodes that are removed and re-added

[linux-2.6-omap-h63xx.git] / fs / dlm / member.c

diff --git a/fs/dlm/member.c b/fs/dlm/member.c
index fa17f5a278831fa3acf3977930fae7fcc63af2df..26133f05ae3a7690911815358ad1f350343564b6 100644 (file)
--- a/fs/dlm/member.c
+++ b/fs/dlm/member.c
@@ -210,6 +210,23 @@ int dlm_recover_members(struct dlm_ls *ls, struct dlm_recover *rv, int *neg_out)
                }
        }
 
+       /* Add an entry to ls_nodes_gone for members that were removed and
+          then added again, so that previous state for these nodes will be
+          cleared during recovery. */
+
+       for (i = 0; i < rv->new_count; i++) {
+               if (!dlm_is_member(ls, rv->new[i]))
+                       continue;
+               log_debug(ls, "new nodeid %d is a re-added member", rv->new[i]);
+
+               memb = kzalloc(sizeof(struct dlm_member), GFP_KERNEL);
+               if (!memb)
+                       return -ENOMEM;
+               memb->nodeid = rv->new[i];
+               list_add_tail(&memb->list, &ls->ls_nodes_gone);
+               neg++;
+       }
+
        /* add new members to ls_nodes */
 
        for (i = 0; i < rv->node_count; i++) {
@@ -314,15 +331,16 @@ int dlm_ls_stop(struct dlm_ls *ls)
 int dlm_ls_start(struct dlm_ls *ls)
 {
        struct dlm_recover *rv = NULL, *rv_old;
-       int *ids = NULL;
-       int error, count;
+       int *ids = NULL, *new = NULL;
+       int error, ids_count = 0, new_count = 0;
 
        rv = kzalloc(sizeof(struct dlm_recover), GFP_KERNEL);
        if (!rv)
                return -ENOMEM;
 
-       error = count = dlm_nodeid_list(ls->ls_name, &ids);
-       if (error <= 0)
+       error = dlm_nodeid_list(ls->ls_name, &ids, &ids_count,
+                               &new, &new_count);
+       if (error < 0)
                goto fail;
 
        spin_lock(&ls->ls_recover_lock);
@@ -337,14 +355,19 @@ int dlm_ls_start(struct dlm_ls *ls)
        }
 
        rv->nodeids = ids;
-       rv->node_count = count;
+       rv->node_count = ids_count;
+       rv->new = new;
+       rv->new_count = new_count;
        rv->seq = ++ls->ls_recover_seq;
        rv_old = ls->ls_recover_args;
        ls->ls_recover_args = rv;
        spin_unlock(&ls->ls_recover_lock);
 
        if (rv_old) {
+               log_error(ls, "unused recovery %llx %d",
+                         (unsigned long long)rv_old->seq, rv_old->node_count);
                kfree(rv_old->nodeids);
+               kfree(rv_old->new);
                kfree(rv_old);
        }
 
@@ -354,6 +377,7 @@ int dlm_ls_start(struct dlm_ls *ls)
  fail:
        kfree(rv);
        kfree(ids);
+       kfree(new);
        return error;
 }