To ensure that we don't reuse their identifiers.
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
---
fs/nfs/nfs4state.c | 20 +++++++++++---------
1 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index b300fb8..7f0fcfc 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -521,6 +521,14 @@ out:
/**
* nfs4_put_state_owner - Release a nfs4_state_owner
* @sp: state owner data to release
+ *
+ * Note that we keep released state owners on an LRU
+ * list.
+ * This caches valid state owners so that they can be
+ * reused, to avoid the OPEN_CONFIRM on minor version 0.
+ * It also pins the uniquifier of dropped state owners for
+ * a while, to ensure that those state owner names are
+ * never reused.
*/
void nfs4_put_state_owner(struct nfs4_state_owner *sp)
{
@@ -530,15 +538,9 @@ void nfs4_put_state_owner(struct nfs4_state_owner *sp)
if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))
return;
- if (!RB_EMPTY_NODE(&sp->so_server_node)) {
- sp->so_expires = jiffies;
- list_add_tail(&sp->so_lru, &server->state_owners_lru);
- spin_unlock(&clp->cl_lock);
- } else {
- nfs4_remove_state_owner_locked(sp);
- spin_unlock(&clp->cl_lock);
- nfs4_free_state_owner(sp);
- }
+ sp->so_expires = jiffies;
+ list_add_tail(&sp->so_lru, &server->state_owners_lru);
+ spin_unlock(&clp->cl_lock);
}
/**
--
1.7.7.6
--
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