From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751845AbdH1TXT (ORCPT ); Mon, 28 Aug 2017 15:23:19 -0400 Received: from mail.savoirfairelinux.com ([208.88.110.44]:36452 "EHLO mail.savoirfairelinux.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751288AbdH1TVl (ORCPT ); Mon, 28 Aug 2017 15:21:41 -0400 From: Vivien Didelot To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel@savoirfairelinux.com, "David S. Miller" , Florian Fainelli , Andrew Lunn , Egil Hjelmeland , John Crispin , Woojung Huh , Sean Wang , Nikita Yushchenko , Chris Healy , Vivien Didelot Subject: [PATCH net-next v2 10/10] net: dsa: debugfs: add port vlan Date: Mon, 28 Aug 2017 15:17:48 -0400 Message-Id: <20170828191748.19492-11-vivien.didelot@savoirfairelinux.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170828191748.19492-1-vivien.didelot@savoirfairelinux.com> References: <20170828191748.19492-1-vivien.didelot@savoirfairelinux.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a debug filesystem "vlan" entry to query a port's hardware VLAN entries through the .port_vlan_dump switch operation. This is really convenient to query directly the hardware or inspect DSA or CPU links, since these ports are not exposed to userspace. Here are the VLAN entries for a CPU port: # cat port5/vlan vid 1 untagged pvid vid 42 tagged Signed-off-by: Vivien Didelot Reviewed-by: Florian Fainelli Reviewed-by: Andrew Lunn --- net/dsa/debugfs.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/net/dsa/debugfs.c b/net/dsa/debugfs.c index bed8e1d5cfe1..40fe19872ab1 100644 --- a/net/dsa/debugfs.c +++ b/net/dsa/debugfs.c @@ -250,6 +250,30 @@ static const struct dsa_debugfs_ops dsa_debugfs_tree_ops = { .read = dsa_debugfs_tree_read, }; +static int dsa_debugfs_vlan_dump_cb(u16 vid, bool pvid, bool untagged, + void *data) +{ + struct seq_file *seq = data; + + seq_printf(seq, "vid %d %s %s\n", vid, + untagged ? "untagged" : "tagged", pvid ? "pvid" : ""); + + return 0; +} + +static int dsa_debugfs_vlan_read(struct dsa_switch *ds, int id, + struct seq_file *seq) +{ + if (!ds->ops->port_vlan_dump) + return -EOPNOTSUPP; + + return ds->ops->port_vlan_dump(ds, id, dsa_debugfs_vlan_dump_cb, seq); +} + +static const struct dsa_debugfs_ops dsa_debugfs_vlan_ops = { + .read = dsa_debugfs_vlan_read, +}; + static int dsa_debugfs_create_port(struct dsa_switch *ds, int port) { struct dentry *dir; @@ -282,6 +306,11 @@ static int dsa_debugfs_create_port(struct dsa_switch *ds, int port) if (err) return err; + err = dsa_debugfs_create_file(ds, dir, "vlan", port, + &dsa_debugfs_vlan_ops); + if (err) + return err; + return 0; } -- 2.14.1