[PATCH 01/10] staging: lustre: ldlm: store name directly in namespace.

[NeilBrown]

Rather than storing the name of a namespace in the
hash table, store it directly in the namespace.
This will allow the hashtable to be changed to use
rhashtable.

Signed-off-by: NeilBrown <ne...@suse.com>
---
 drivers/staging/lustre/lustre/include/lustre_dlm.h |    5 ++++-
 drivers/staging/lustre/lustre/ldlm/ldlm_resource.c |    5 +++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/include/lustre_dlm.h 
b/drivers/staging/lustre/lustre/include/lustre_dlm.h
index d668d86423a4..b3532adac31c 100644
--- a/drivers/staging/lustre/lustre/include/lustre_dlm.h
+++ b/drivers/staging/lustre/lustre/include/lustre_dlm.h
@@ -362,6 +362,9 @@ struct ldlm_namespace {
        /** Flag indicating if namespace is on client instead of server */
        enum ldlm_side          ns_client;
 
+       /** name of this namespace */
+       char                    *ns_name;
+
        /** Resource hash table for namespace. */
        struct cfs_hash         *ns_rs_hash;
 
@@ -878,7 +881,7 @@ static inline bool ldlm_has_layout(struct ldlm_lock *lock)
 static inline char *
 ldlm_ns_name(struct ldlm_namespace *ns)
 {
-       return ns->ns_rs_hash->hs_name;
+       return ns->ns_name;
 }
 
 static inline struct ldlm_namespace *
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c 
b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
index 6c615b6e9bdc..43bbc5fd94cc 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
@@ -688,6 +688,9 @@ struct ldlm_namespace *ldlm_namespace_new(struct obd_device 
*obd, char *name,
        ns->ns_obd      = obd;
        ns->ns_appetite = apt;
        ns->ns_client   = client;
+       ns->ns_name     = kstrdup(name, GFP_KERNEL);
+       if (!ns->ns_name)
+               goto out_hash;
 
        INIT_LIST_HEAD(&ns->ns_list_chain);
        INIT_LIST_HEAD(&ns->ns_unused_list);
@@ -730,6 +733,7 @@ struct ldlm_namespace *ldlm_namespace_new(struct obd_device 
*obd, char *name,
        ldlm_namespace_sysfs_unregister(ns);
        ldlm_namespace_cleanup(ns, 0);
 out_hash:
+       kfree(ns->ns_name);
        cfs_hash_putref(ns->ns_rs_hash);
 out_ns:
        kfree(ns);
@@ -993,6 +997,7 @@ void ldlm_namespace_free_post(struct ldlm_namespace *ns)
        ldlm_namespace_debugfs_unregister(ns);
        ldlm_namespace_sysfs_unregister(ns);
        cfs_hash_putref(ns->ns_rs_hash);
+       kfree(ns->ns_name);
        /* Namespace \a ns should be not on list at this time, otherwise
         * this will cause issues related to using freed \a ns in poold
         * thread.