NFSv4.1: Get rid of redundant NFS4CLNT_LAYOUTRECALL tests

The NFS4CLNT_LAYOUTRECALL tests in pnfs_layout_process and
pnfs_update_layout are redundant.

In the case of a bulk layout recall, we're always testing for
the NFS_LAYOUT_BULK_RECALL flay anyway.
In the case of a file or segment recall, the call to
pnfs_set_layout_stateid() updates the layout_header 'barrier'
sequence id, which triggers the test in pnfs_layoutgets_blocked()
and is less race-prone than NFS4CLNT_LAYOUTRECALL anyway.

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

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index a534216..402efc2 100644 (file)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -966,8 +966,7 @@ pnfs_update_layout(struct inode *ino,
        }
 
        /* Do we even need to bother with this? */
-       if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) ||
-           test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
+       if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
                dprintk("%s matches recall, use MDS\n", __func__);
                goto out_unlock;
        }
@@ -1032,7 +1031,6 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
        struct nfs4_layoutget_res *res = &lgp->res;
        struct pnfs_layout_segment *lseg;
        struct inode *ino = lo->plh_inode;
-       struct nfs_client *clp = NFS_SERVER(ino)->nfs_client;
        int status = 0;
 
        /* Inject layout blob into I/O device driver */
@@ -1048,8 +1046,7 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
        }
 
        spin_lock(&ino->i_lock);
-       if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) ||
-           test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
+       if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
                dprintk("%s forget reply due to recall\n", __func__);
                goto out_forget_reply;
        }