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authorBenjamin Coddington <bcodding@redhat.com>2017-04-11 12:50:10 -0400
committerTrond Myklebust <trond.myklebust@primarydata.com>2017-04-21 10:45:01 -0400
commit7d6ddf88c4db372689c8aa65ea652d0514d66c06 (patch)
tree8fb586be995259ff4c98a01ee9ed183b107195b5 /include/linux/nfs_fs.h
parent50f2112cf7a3e62a8d33838eb205d5fef306457a (diff)
NFS: Add an iocounter wait function for async RPC tasks
By sleeping on a new NFS Unlock-On-Close waitqueue, rpc tasks may wait for a lock context's iocounter to reach zero. The rpc waitqueue is only woken when the open_context has the NFS_CONTEXT_UNLOCK flag set in order to mitigate spurious wake-ups for any iocounter reaching zero. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/nfs_fs.h')
-rw-r--r--include/linux/nfs_fs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 1b29915247b2..9aa044e76820 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -76,6 +76,7 @@ struct nfs_open_context {
#define NFS_CONTEXT_ERROR_WRITE (0)
#define NFS_CONTEXT_RESEND_WRITES (1)
#define NFS_CONTEXT_BAD (2)
+#define NFS_CONTEXT_UNLOCK (3)
int error;
struct list_head list;