/* ar-skbuff.c: socket buffer destruction handling
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include "ar-internal.h"

#define select_skb_count(op) (op >= rxrpc_skb_tx_cleaned ? &rxrpc_n_tx_skbs : &rxrpc_n_rx_skbs)

/*
 * Note the allocation or reception of a socket buffer.
 */
void rxrpc_new_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
{
	const void *here = __builtin_return_address(0);
	int n = atomic_inc_return(select_skb_count(op));
	trace_rxrpc_skb(skb, op, atomic_read(&skb->users), n, here);
}

/*
 * Note the re-emergence of a socket buffer from a queue or buffer.
 */
void rxrpc_see_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
{
	const void *here = __builtin_return_address(0);
	if (skb) {
		int n = atomic_read(select_skb_count(op));
		trace_rxrpc_skb(skb, op, atomic_read(&skb->users), n, here);
	}
}

/*
 * Note the addition of a ref on a socket buffer.
 */
void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
{
	const void *here = __builtin_return_address(0);
	int n = atomic_inc_return(select_skb_count(op));
	trace_rxrpc_skb(skb, op, atomic_read(&skb->users), n, here);
	skb_get(skb);
}

/*
 * Note the destruction of a socket buffer.
 */
void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
{
	const void *here = __builtin_return_address(0);
	if (skb) {
		int n;
		CHECK_SLAB_OKAY(&skb->users);
		n = atomic_dec_return(select_skb_count(op));
		trace_rxrpc_skb(skb, op, atomic_read(&skb->users), n, here);
		kfree_skb(skb);
	}
}

/*
 * Note the injected loss of a socket buffer.
 */
void rxrpc_lose_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
{
	const void *here = __builtin_return_address(0);
	if (skb) {
		int n;
		CHECK_SLAB_OKAY(&skb->users);
		n = atomic_dec_return(select_skb_count(op));
		trace_rxrpc_skb(skb, op, atomic_read(&skb->users), n, here);
		kfree_skb(skb);
	}
}

/*
 * Clear a queue of socket buffers.
 */
void rxrpc_purge_queue(struct sk_buff_head *list)
{
	const void *here = __builtin_return_address(0);
	struct sk_buff *skb;
	while ((skb = skb_dequeue((list))) != NULL) {
		int n = atomic_dec_return(select_skb_count(rxrpc_skb_rx_purged));
		trace_rxrpc_skb(skb, rxrpc_skb_rx_purged,
				atomic_read(&skb->users), n, here);
		kfree_skb(skb);
	}
}
f47b7bb4124ef970a13eac4fdeddd1fc25'>include</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Eric Dumazet &lt;edumazet@google.com&gt;</td><td class='right'>2017-02-02 18:43:28 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-03 17:28:29 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>79e7fff47b7bb4124ef970a13eac4fdeddd1fc25</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>484a1b06f220a2e6566ddbaba553eaa831eca1ba</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>include</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include?id=7a655c6324a8968ea2f027bf3660c87c42ac3de4'>7a655c6324a8968ea2f027bf3660c87c42ac3de4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25&amp;id2=7a655c6324a8968ea2f027bf3660c87c42ac3de4'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: remove support for per driver ndo_busy_poll()</div><div class='commit-msg'>We added generic support for busy polling in NAPI layer in linux-4.5

No network driver uses ndo_busy_poll() anymore, we can get rid
of the pointer in struct net_device_ops, and its use in sk_busy_loop()

Saves NETIF_F_BUSY_POLL features bit.

Signed-off-by: Eric Dumazet &lt;edumazet@google.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>Diffstat</a> (limited to 'include')</div><table summary='diffstat' class='diffstat'><tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/cgit.cgi/linux/net-next.git/diff/include/linux/netdev_features.h?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>include/linux/netdev_features.h</a></td><td class='right'>2</td><td class='graph'><table summary='file diffstat' width='3%'><tr><td class='add' style='width: 0.0%;'/><td class='rem' style='width: 66.7%;'/><td class='none' style='width: 33.3%;'/></tr></table></td></tr>
<tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/cgit.cgi/linux/net-next.git/diff/include/linux/netdevice.h?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>include/linux/netdevice.h</a></td><td class='right'>3</td><td class='graph'><table summary='file diffstat' width='3%'><tr><td class='add' style='width: 0.0%;'/><td class='rem' style='width: 100.0%;'/><td class='none' style='width: 0.0%;'/></tr></table></td></tr>
</table><div class='diffstat-summary'>2 files changed, 0 insertions, 5 deletions</div><table summary='diff' class='diff'><tr><td><div class='head'>diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h