NFSv4.1: nfs4_proc_layoutreturn must always drop the plh_block_lgets count

Currently it does not do so if the RPC call failed to start. Fix is to
move the decrement of plh_block_lgets into nfs4_layoutreturn_release.

Also remove a redundant test of task->tk_status in nfs4_layoutreturn_done:
if lrp->res.lrs_present is set, then obviously the RPC call succeeded.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d9d67b36a42701b3bd574b431a3d6cf937df851c..6e95b20c14c89e27241338c5307eac050f18e568 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6346,7 +6346,6 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
 {
        struct nfs4_layoutreturn *lrp = calldata;
        struct nfs_server *server;
-       struct pnfs_layout_hdr *lo = lrp->args.layout;
 
        dprintk("--> %s\n", __func__);
 
@@ -6358,19 +6357,20 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
                rpc_restart_call_prepare(task);
                return;
        }
-       spin_lock(&lo->plh_inode->i_lock);
-       if (task->tk_status == 0 && lrp->res.lrs_present)
-               pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
-       lo->plh_block_lgets--;
-       spin_unlock(&lo->plh_inode->i_lock);
        dprintk("<-- %s\n", __func__);
 }
 
 static void nfs4_layoutreturn_release(void *calldata)
 {
        struct nfs4_layoutreturn *lrp = calldata;
+       struct pnfs_layout_hdr *lo = lrp->args.layout;
 
        dprintk("--> %s\n", __func__);
+       spin_lock(&lo->plh_inode->i_lock);
+       if (lrp->res.lrs_present)
+               pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
+       lo->plh_block_lgets--;
+       spin_unlock(&lo->plh_inode->i_lock);
        pnfs_put_layout_hdr(lrp->args.layout);
        kfree(calldata);
        dprintk("<-- %s\n", __func__);