Commit 9a7fe9e8 authored by Trond Myklebust's avatar Trond Myklebust

NFSv4.1: Minor optimisation in get_layout_by_fh_locked()

If the filehandles match, but the igrab() fails, or the layout is
freed before we can get it, then just return NULL.
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 27999f25
......@@ -127,13 +127,13 @@ static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp,
continue;
ino = igrab(lo->plh_inode);
if (!ino)
continue;
break;
spin_lock(&ino->i_lock);
/* Is this layout in the process of being freed? */
if (NFS_I(ino)->layout != lo) {
spin_unlock(&ino->i_lock);
iput(ino);
continue;
break;
}
pnfs_get_layout_hdr(lo);
spin_unlock(&ino->i_lock);
......
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