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2025-06-24 13:14:22 +02:00
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target/linux/ipq806x/patches-5.4/999-03c-qca-nss-pppoe-offload-support.patch Normal file
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@@ -0,0 +1,447 @@
From 5f3ab2b6d1a6cadc1b7c231cefdf91b14972e436 Mon Sep 17 00:00:00 2001
From: Murat Sezgin <msezgin@codeaurora.org>
Date: Fri, 16 Jan 2015 15:28:47 -0800
Subject: ppp: PPPoE acceleration support.
Added some new APIs to the PPP/PPPoE kernel modules
for using from the hardware acceleration connection managers.
Change-Id: I2c16c6d6ccba8ffa14aec077c8dad1681535ae0b
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
---
drivers/net/ppp/ppp_generic.c | 190 ++++++++++++++++++++++++++++++++++++++++++
drivers/net/ppp/pppoe.c | 79 ++++++++++++++++--
include/linux/if_pppox.h | 16 +++-
include/linux/ppp_channel.h | 38 +++++++++
4 files changed, 317 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 56af90b..58b889e 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -1,5 +1,21 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
+ **************************************************************************
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all copies.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ **************************************************************************
+ */
+
+/*
* Generic PPP layer for Linux.
*
* Copyright 1999-2002 Paul Mackerras.
@@ -3341,6 +3357,178 @@ static void *unit_find(struct idr *p, int n)
return idr_find(p, n);
}
+/* Updates the PPP interface statistics. */
+void ppp_update_stats(struct net_device *dev, unsigned long rx_packets,
+ unsigned long rx_bytes, unsigned long tx_packets,
+ unsigned long tx_bytes)
+{
+ struct ppp *ppp;
+
+ if (!dev)
+ return;
+
+ if (dev->type != ARPHRD_PPP)
+ return;
+
+ ppp = netdev_priv(dev);
+
+ ppp_xmit_lock(ppp);
+ ppp->stats64.tx_packets += tx_packets;
+ ppp->stats64.tx_bytes += tx_bytes;
+ ppp_xmit_unlock(ppp);
+
+ ppp_recv_lock(ppp);
+ ppp->stats64.rx_packets += rx_packets;
+ ppp->stats64.rx_bytes += rx_bytes;
+ ppp_recv_unlock(ppp);
+}
+
+/* Returns >0 if the device is a multilink PPP netdevice, 0 if not or < 0 if
+ * the device is not PPP.
+ */
+int ppp_is_multilink(struct net_device *dev)
+{
+ struct ppp *ppp;
+ unsigned int flags;
+
+ if (!dev)
+ return -1;
+
+ if (dev->type != ARPHRD_PPP)
+ return -1;
+
+ ppp = netdev_priv(dev);
+ ppp_lock(ppp);
+ flags = ppp->flags;
+ ppp_unlock(ppp);
+
+ if (flags & SC_MULTILINK)
+ return 1;
+
+ return 0;
+}
+EXPORT_SYMBOL(ppp_is_multilink);
+
+/* ppp_channel_get_protocol()
+ * Call this to obtain the underlying protocol of the PPP channel,
+ * e.g. PX_PROTO_OE
+ *
+ * NOTE: Some channels do not use PX sockets so the protocol value may be very
+ * different for them.
+ * NOTE: -1 indicates failure.
+ * NOTE: Once you know the channel protocol you may then either cast 'chan' to
+ * its sub-class or use the channel protocol specific API's as provided by that
+ * channel sub type.
+ */
+int ppp_channel_get_protocol(struct ppp_channel *chan)
+{
+ if (!chan->ops->get_channel_protocol)
+ return -1;
+
+ return chan->ops->get_channel_protocol(chan);
+}
+EXPORT_SYMBOL(ppp_channel_get_protocol);
+
+/* ppp_channel_hold()
+ * Call this to hold a channel.
+ *
+ * Returns true on success or false if the hold could not happen.
+ *
+ * NOTE: chan must be protected against destruction during this call -
+ * either by correct locking etc. or because you already have an implicit
+ * or explicit hold to the channel already and this is an additional hold.
+ */
+bool ppp_channel_hold(struct ppp_channel *chan)
+{
+ if (!chan->ops->hold)
+ return false;
+
+ chan->ops->hold(chan);
+ return true;
+}
+EXPORT_SYMBOL(ppp_channel_hold);
+
+/* ppp_channel_release()
+ * Call this to release a hold you have upon a channel
+ */
+void ppp_channel_release(struct ppp_channel *chan)
+{
+ chan->ops->release(chan);
+}
+EXPORT_SYMBOL(ppp_channel_release);
+
+/* ppp_hold_channels()
+ * Returns the PPP channels of the PPP device, storing each one into
+ * channels[].
+ *
+ * channels[] has chan_sz elements.
+ * This function returns the number of channels stored, up to chan_sz.
+ * It will return < 0 if the device is not PPP.
+ *
+ * You MUST release the channels using ppp_release_channels().
+ */
+int ppp_hold_channels(struct net_device *dev, struct ppp_channel *channels[],
+ unsigned int chan_sz)
+{
+ struct ppp *ppp;
+ int c;
+ struct channel *pch;
+
+ if (!dev)
+ return -1;
+
+ if (dev->type != ARPHRD_PPP)
+ return -1;
+
+ ppp = netdev_priv(dev);
+
+ c = 0;
+ ppp_lock(ppp);
+ list_for_each_entry(pch, &ppp->channels, clist) {
+ struct ppp_channel *chan;
+
+ if (!pch->chan) {
+ /* Channel is going / gone away */
+ continue;
+ }
+
+ if (c == chan_sz) {
+ /* No space to record channel */
+ ppp_unlock(ppp);
+ return c;
+ }
+
+ /* Hold the channel, if supported */
+ chan = pch->chan;
+ if (!chan->ops->hold)
+ continue;
+
+ chan->ops->hold(chan);
+
+ /* Record the channel */
+ channels[c++] = chan;
+ }
+ ppp_unlock(ppp);
+ return c;
+}
+EXPORT_SYMBOL(ppp_hold_channels);
+
+/* ppp_release_channels()
+ * Releases channels
+ */
+void ppp_release_channels(struct ppp_channel *channels[], unsigned int chan_sz)
+{
+ unsigned int c;
+
+ for (c = 0; c < chan_sz; ++c) {
+ struct ppp_channel *chan;
+
+ chan = channels[c];
+ chan->ops->release(chan);
+ }
+}
+EXPORT_SYMBOL(ppp_release_channels);
+
/* Module/initialization stuff */
module_init(ppp_init);
@@ -3357,6 +3545,8 @@ EXPORT_SYMBOL(ppp_input_error);
EXPORT_SYMBOL(ppp_output_wakeup);
EXPORT_SYMBOL(ppp_register_compressor);
EXPORT_SYMBOL(ppp_unregister_compressor);
+EXPORT_SYMBOL(ppp_update_stats);
+
MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV(PPP_MAJOR, 0);
MODULE_ALIAS_RTNL_LINK("ppp");
diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
index df5d418..23590dd 100644
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -62,6 +62,7 @@
#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
+#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/if_ether.h>
#include <linux/if_pppox.h>
@@ -92,7 +93,7 @@
static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb);
static const struct proto_ops pppoe_ops;
-static const struct ppp_channel_ops pppoe_chan_ops;
+static const struct pppoe_channel_ops pppoe_chan_ops;
/* per-net private data for this module */
static unsigned int pppoe_net_id __read_mostly;
@@ -649,6 +650,7 @@ static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr,
if (stage_session(po->pppoe_pa.sid)) {
pppox_unbind_sock(sk);
pn = pppoe_pernet(sock_net(sk));
+
delete_item(pn, po->pppoe_pa.sid,
po->pppoe_pa.remote, po->pppoe_ifindex);
if (po->pppoe_dev) {
@@ -696,7 +698,7 @@ static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr,
po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr) - 2;
po->chan.private = sk;
- po->chan.ops = &pppoe_chan_ops;
+ po->chan.ops = (struct ppp_channel_ops *)&pppoe_chan_ops;
error = ppp_register_net_channel(dev_net(dev), &po->chan);
if (error) {
@@ -1001,11 +1003,78 @@ static int pppoe_flow_offload_check(struct ppp_channel *chan,
}
#endif /* CONFIG_NF_FLOW_TABLE */
-static const struct ppp_channel_ops pppoe_chan_ops = {
- .start_xmit = pppoe_xmit,
+/************************************************************************
+ *
+ * function called by generic PPP driver to hold channel
+ *
+ ***********************************************************************/
+static void pppoe_hold_chan(struct ppp_channel *chan)
+{
+ struct sock *sk = (struct sock *)chan->private;
+
+ sock_hold(sk);
+}
+
+/************************************************************************
+ *
+ * function called by generic PPP driver to release channel
+ *
+ ***********************************************************************/
+static void pppoe_release_chan(struct ppp_channel *chan)
+{
+ struct sock *sk = (struct sock *)chan->private;
+
+ sock_put(sk);
+}
+
+/************************************************************************
+ *
+ * function called to get the channel protocol type
+ *
+ ***********************************************************************/
+static int pppoe_get_channel_protocol(struct ppp_channel *chan)
+{
+ return PX_PROTO_OE;
+}
+
+/************************************************************************
+ *
+ * function called to get the PPPoE channel addressing
+ * NOTE: This function returns a HOLD to the netdevice
+ *
+ ***********************************************************************/
+static void pppoe_get_addressing(struct ppp_channel *chan,
+ struct pppoe_opt *addressing)
+{
+ struct sock *sk = (struct sock *)chan->private;
+ struct pppox_sock *po = pppox_sk(sk);
+
+ *addressing = po->proto.pppoe;
+ if (addressing->dev)
+ dev_hold(addressing->dev);
+}
+
+/* pppoe_channel_addressing_get()
+ * Return PPPoE channel specific addressing information.
+ */
+void pppoe_channel_addressing_get(struct ppp_channel *chan,
+ struct pppoe_opt *addressing)
+{
+ pppoe_get_addressing(chan, addressing);
+}
+EXPORT_SYMBOL(pppoe_channel_addressing_get);
+
+static const struct pppoe_channel_ops pppoe_chan_ops = {
+ /* PPPoE specific channel ops */
+ .get_addressing = pppoe_get_addressing,
+ /* General ppp channel ops */
+ .ops.start_xmit = pppoe_xmit,
#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
- .flow_offload_check = pppoe_flow_offload_check,
+ .ops.flow_offload_check = pppoe_flow_offload_check,
#endif
+ .ops.get_channel_protocol = pppoe_get_channel_protocol,
+ .ops.hold = pppoe_hold_chan,
+ .ops.release = pppoe_release_chan,
};
static int pppoe_recvmsg(struct socket *sock, struct msghdr *m,
diff --git a/include/linux/if_pppox.h b/include/linux/if_pppox.h
index 69e813b..98131ea 100644
--- a/include/linux/if_pppox.h
+++ b/include/linux/if_pppox.h
@@ -1,13 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/***************************************************************************
* Linux PPP over X - Generic PPP transport layer sockets
- * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516)
+ * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516)
*
* This file supplies definitions required by the PPP over Ethernet driver
* (pppox.c). All version information wrt this file is located in pppox.c
*
* License:
*/
+
#ifndef __LINUX_IF_PPPOX_H
#define __LINUX_IF_PPPOX_H
@@ -93,4 +94,17 @@ enum {
PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/
};
+/*
+ * PPPoE Channel specific operations
+ */
+struct pppoe_channel_ops {
+ /* Must be first - general to all PPP channels */
+ struct ppp_channel_ops ops;
+ void (*get_addressing)(struct ppp_channel *, struct pppoe_opt *);
+};
+
+/* Return PPPoE channel specific addressing information */
+extern void pppoe_channel_addressing_get(struct ppp_channel *chan,
+ struct pppoe_opt *addressing);
+
#endif /* !(__LINUX_IF_PPPOX_H) */
diff --git a/include/linux/ppp_channel.h b/include/linux/ppp_channel.h
index 326a6fa..db352ff 100644
--- a/include/linux/ppp_channel.h
+++ b/include/linux/ppp_channel.h
@@ -32,6 +32,14 @@ struct ppp_channel_ops {
#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
int (*flow_offload_check)(struct ppp_channel *, struct flow_offload_hw_path *);
#endif
+ /* Get channel protocol type, one of PX_PROTO_XYZ or specific to
+ * the channel subtype
+ */
+ int (*get_channel_protocol)(struct ppp_channel *);
+ /* Hold the channel from being destroyed */
+ void (*hold)(struct ppp_channel *);
+ /* Release hold on the channel */
+ void (*release)(struct ppp_channel *);
};
struct ppp_channel {
@@ -46,6 +54,36 @@ struct ppp_channel {
};
#ifdef __KERNEL__
+/* Call this to obtain the underlying protocol of the PPP channel,
+ * e.g. PX_PROTO_OE
+ */
+extern int ppp_channel_get_protocol(struct ppp_channel *);
+
+/* Call this to hold a channel */
+extern bool ppp_channel_hold(struct ppp_channel *);
+
+/* Call this to release a hold you have upon a channel */
+extern void ppp_channel_release(struct ppp_channel *);
+
+/* Release hold on PPP channels */
+extern void ppp_release_channels(struct ppp_channel *channels[],
+ unsigned int chan_sz);
+
+/* Hold PPP channels for the PPP device */
+extern int ppp_hold_channels(struct net_device *dev,
+ struct ppp_channel *channels[],
+ unsigned int chan_sz);
+
+/* Test if the ppp device is a multi-link ppp device */
+extern int ppp_is_multilink(struct net_device *dev);
+
+/* Update statistics of the PPP net_device by incrementing related
+ * statistics field value with corresponding parameter
+ */
+extern void ppp_update_stats(struct net_device *dev, unsigned long rx_packets,
+ unsigned long rx_bytes, unsigned long tx_packets,
+ unsigned long tx_bytes);
+
/* Called by the channel when it can send some more data. */
extern void ppp_output_wakeup(struct ppp_channel *);
--
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