[v5,10/38] SQUASHME: pnfs: refactor device cache _find_get_deviceid
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Message ID 1306108178-28173-1-git-send-email-bhalevy@panasas.com
State New, archived
Headers show

Commit Message

Benny Halevy May 22, 2011, 11:49 p.m. UTC
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
---
 fs/nfs/pnfs_dev.c |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)

Patch
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diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c
index 374fa66..f830616 100644
--- a/fs/nfs/pnfs_dev.c
+++ b/fs/nfs/pnfs_dev.c
@@ -90,17 +90,24 @@  _lookup_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id,
  * @id deviceid to look up
  */
 struct nfs4_deviceid_node *
-nfs4_find_get_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id)
+_find_get_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id,
+		   long hash)
 {
 	struct nfs4_deviceid_node *d;
 
 	rcu_read_lock();
-	d = _lookup_deviceid(clp, id, nfs4_deviceid_hash(id));
+	d = _lookup_deviceid(clp, id, hash);
 	if (!atomic_inc_not_zero(&d->ref))
 		d = NULL;
 	rcu_read_unlock();
 	return d;
 }
+
+struct nfs4_deviceid_node *
+nfs4_find_get_deviceid(const struct nfs_client *clp, const struct nfs4_deviceid *id)
+{
+	return _find_get_deviceid(clp, id, nfs4_deviceid_hash(id));
+}
 EXPORT_SYMBOL_GPL(nfs4_find_get_deviceid);
 
 /*
@@ -189,13 +196,13 @@  nfs4_insert_deviceid_node(struct nfs4_deviceid_node *new)
 	long hash;
 
 	spin_lock(&nfs4_deviceid_lock);
-	d = nfs4_find_get_deviceid(new->nfs_client, &new->deviceid);
+	hash = nfs4_deviceid_hash(&new->deviceid);
+	d = _find_get_deviceid(new->nfs_client, &new->deviceid, hash);
 	if (d) {
 		spin_unlock(&nfs4_deviceid_lock);
 		return d;
 	}
 
-	hash = nfs4_deviceid_hash(&new->deviceid);
 	hlist_add_head_rcu(&new->node, &nfs4_deviceid_cache[hash]);
 	spin_unlock(&nfs4_deviceid_lock);