/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

#ifndef RX_RING_H
#define RX_RING_H

#include <stdbool.h>

#include "ring.h"

extern void ring_rx_setup(struct ring *ring, int sock, size_t size, int ifindex,
			  struct pollfd *poll, bool v3, bool jumbo_support,
			  bool verbose);
extern void destroy_rx_ring(int sock, struct ring *ring);
extern void sock_rx_net_stats(int sock, unsigned long seen);

static inline int user_may_pull_from_rx(struct tpacket2_hdr *hdr)
{
	return ((hdr->tp_status & TP_STATUS_USER) == TP_STATUS_USER);
}

static inline int user_may_pull_from_rx_block(struct block_desc *pbd)
{
	return ((pbd->h1.block_status & TP_STATUS_USER) == TP_STATUS_USER);
}

static inline void kernel_may_pull_from_rx(struct tpacket2_hdr *hdr)
{
	hdr->tp_status = TP_STATUS_KERNEL;
}

static inline void kernel_may_pull_from_rx_block(struct block_desc *pbd)
{
	pbd->h1.block_status = TP_STATUS_KERNEL;
}

#endif /* RX_RING_H */
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<tr><th>author</th><td>Andrey Ryabinin &lt;aryabinin@virtuozzo.com&gt;</td><td class='right'>2015-11-05 18:51:23 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2015-11-05 19:34:48 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/lib/Kconfig.kasan?id=89d3c87e20d95e3238eac85e43de7b3cb1f39d8b'>89d3c87e20d95e3238eac85e43de7b3cb1f39d8b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/lib/Kconfig.kasan?id=89d3c87e20d95e3238eac85e43de7b3cb1f39d8b'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/lib/Kconfig.kasan?id=10f702627e139e21465f4c9d44f63527bbca163c'>10f702627e139e21465f4c9d44f63527bbca163c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/lib/Kconfig.kasan?id=89d3c87e20d95e3238eac85e43de7b3cb1f39d8b&amp;id2=10f702627e139e21465f4c9d44f63527bbca163c'>diff</a>)</td></tr></table>
<div class='commit-subject'>mm, slub, kasan: enable user tracking by default with KASAN=y</div><div class='commit-msg'>It's recommended to have slub's user tracking enabled with CONFIG_KASAN,
because:

a) User tracking disables slab merging which improves
    detecting out-of-bounds accesses.
b) User tracking metadata acts as redzone which also improves
    detecting out-of-bounds accesses.
c) User tracking provides additional information about object.
    This information helps to understand bugs.

Currently it is not enabled by default.  Besides recompiling the kernel
with KASAN and reinstalling it, user also have to change the boot cmdline,
which is not very handy.

Enable slub user tracking by default with KASAN=y, since there is no good
reason to not do this.

[akpm@linux-foundation.org: little fixes, per David]
Signed-off-by: Andrey Ryabinin &lt;aryabinin@virtuozzo.com&gt;
Cc: Christoph Lameter &lt;cl@linux.com&gt;
Cc: Pekka Enberg &lt;penberg@kernel.org&gt;
Cc: David Rientjes &lt;rientjes@google.com&gt;
Cc: Joonsoo Kim &lt;iamjoonsoo.kim@lge.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=89d3c87e20d95e3238eac85e43de7b3cb1f39d8b'>Diffstat</a> (limited to 'lib/Kconfig.kasan')</div><table summary='diffstat' class='diffstat'>