nfsd: report in /proc/fs/nfsd/clients/*/states when state is admin-revoke

Add "admin-revoked" to the status information for any states that have
been admin-revoked.  This can be useful for confirming correct
behaviour.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

fs/nfsd/nfs4state.c

@@ -2717,6 +2717,8 @@ static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st)
 	}
 	spin_unlock(&nf->fi_lock);
 	nfs4_show_owner(s, oo);
+	if (st->sc_status & SC_STATUS_ADMIN_REVOKED)
+		seq_puts(s, ", admin-revoked");
 	seq_puts(s, " }\n");
 	return 0;
 }
@@ -2753,6 +2755,8 @@ static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st)
 		seq_puts(s, ", ");
 	}
 	nfs4_show_owner(s, oo);
+	if (st->sc_status & SC_STATUS_ADMIN_REVOKED)
+		seq_puts(s, ", admin-revoked");
 	seq_puts(s, " }\n");
 	spin_unlock(&nf->fi_lock);
 	return 0;
@@ -2784,8 +2788,10 @@ static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st)
 		seq_puts(s, ", ");
 		nfs4_show_fname(s, file);
 	}
-	seq_puts(s, " }\n");
 	spin_unlock(&nf->fi_lock);
+	if (st->sc_status & SC_STATUS_ADMIN_REVOKED)
+		seq_puts(s, ", admin-revoked");
+	seq_puts(s, " }\n");
 	return 0;
 }
 
@@ -2809,6 +2815,8 @@ static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st)
 		seq_puts(s, ", ");
 		nfs4_show_fname(s, file);
 	}
+	if (st->sc_status & SC_STATUS_ADMIN_REVOKED)
+		seq_puts(s, ", admin-revoked");
 	seq_puts(s, " }\n");
 
 	return 0;