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

#ifndef RING_H
#define RING_H

/*
 * "I love the smell of 10GbE in the morning. Smells like ... victory."
 *     - W. Richard Stevens, "Secret Teachings of the UNIX Environment"
 */

#include <stdio.h>
#include <stdint.h>
#include <linux/if_packet.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <sys/ioctl.h>
#include <string.h>
#include <poll.h>

#include "built_in.h"
#include "die.h"
#include "dev.h"
#include "config.h"

#ifndef POLLRDNORM
# define POLLRDNORM	0x0040
#endif

union tpacket_uhdr {
	struct tpacket_hdr  *h1;
	struct tpacket2_hdr *h2;
#ifdef HAVE_TPACKET3
	struct tpacket3_hdr *h3;
#endif
	void *raw;
};

#ifdef HAVE_TPACKET3
#define tpacket_uhdr(hdr, member, v3)	\
	((v3) ? ((hdr).h3)->member : ((hdr).h2)->member)
#else
#define tpacket_uhdr(hdr, member, v3)	\
	(((hdr).h2)->member)
#endif /* HAVE_TPACKET3 */

struct frame_map {
	struct tpacket2_hdr tp_h __aligned_tpacket;
	struct sockaddr_ll s_ll __align_tpacket(sizeof(struct tpacket2_hdr));
};

#ifdef HAVE_TPACKET3
struct block_desc {
	uint32_t version;
	uint32_t offset_to_priv;
	struct tpacket_hdr_v1 h1;
};
#endif

struct ring {
	struct iovec *frames;
	uint8_t *mm_space;
	size_t mm_len;
	struct sockaddr_ll s_ll;
	union {
		struct tpacket_req layout;
#ifdef HAVE_TPACKET3
		struct tpacket_req3 layout3;
#endif
		uint8_t raw;
	};
};

static inline void next_rnd_slot(unsigned int *it, struct ring *ring)
{
	*it = rand() % ring->layout.tp_frame_nr;
}

static inline size_t ring_size(char *ifname, size_t size)
{
	if (size > 0)
		return size;

	/*
	 * Device bitrate in bytes times two as ring size.
	 *    Fallback => ~    64,00 MB
	 *     10 MBit => ~     2,38 MB
	 *     54 MBit => ~    12,88 MB
	 *    100 MBit => ~    23,84 MB
	 *    300 MBit => ~    71,52 MB
	 *  1.000 MBit => ~   238,42 MB
	 * 10.000 MBit => ~ 2.384.18 MB
	 */
	size = device_bitrate(ifname);
	size = (size * 1000000) / 8;
	size = size * 2;
	if (size == 0)
		size = 1 << 26;

	return round_up_cacheline(size);
}

static inline unsigned int ring_frame_size(struct ring *ring)
{
	return ring->layout.tp_frame_size;
}

static inline void ring_verify_layout(struct ring *ring)
{
	bug_on(ring->layout.tp_block_size  < ring->layout.tp_frame_size);
	bug_on((ring->layout.tp_block_size % ring->layout.tp_frame_size) != 0);
	bug_on((ring->layout.tp_block_size % RUNTIME_PAGE_SIZE) != 0);
}

static inline void tpacket_hdr_clone(struct tpacket2_hdr *thdrd,
				     struct tpacket2_hdr *thdrs)
{
        thdrd->tp_sec = thdrs->tp_sec;
        thdrd->tp_nsec = thdrs->tp_nsec;
        thdrd->tp_snaplen = thdrs->tp_snaplen;
        thdrd->tp_len = thdrs->tp_len;
}

static inline void prepare_polling(int sock, struct pollfd *pfd)
{
	memset(pfd, 0, sizeof(*pfd));
	pfd->fd = sock;
	pfd->revents = 0;
	pfd->events = POLLIN | POLLRDNORM | POLLERR;
}

static inline void __set_sockopt_tpacket(int sock, int val)
{
	int ret = setsockopt(sock, SOL_PACKET, PACKET_VERSION, &val, sizeof(val));
	if (ret)
		panic("Cannot set tpacketv2!\n");
}

static inline void set_sockopt_tpacket_v2(int sock)
{
	__set_sockopt_tpacket(sock, TPACKET_V2);
}

#ifdef HAVE_TPACKET3
static inline void set_sockopt_tpacket_v3(int sock)
{
	__set_sockopt_tpacket(sock, TPACKET_V3);
}
#else
static inline void set_sockopt_tpacket_v3(int sock __maybe_unused)
{
}
#endif

static inline int get_sockopt_tpacket(int sock)
{
	int val, ret;
	socklen_t len = sizeof(val);

	ret = getsockopt(sock, SOL_PACKET, PACKET_VERSION, &val, &len);
	if (ret)
		panic("Cannot get tpacket version!\n");

	return val;
}

extern void mmap_ring_generic(int sock, struct ring *ring);
extern void alloc_ring_frames_generic(struct ring *ring, int num, size_t size);
extern void bind_ring_generic(int sock, struct ring *ring, int ifindex, bool tx_only);

#endif /* RING_H */
mit info' class='commit-info'>
<tr><th>author</th><td>pravin shelar &lt;pshelar@ovn.org&gt;</td><td class='right'>2016-08-05 17:45:37 -0700</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2016-08-08 14:16:24 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=bbec7802c6948c8626b71a4fe31283cb4691c358'>bbec7802c6948c8626b71a4fe31283cb4691c358</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=bbec7802c6948c8626b71a4fe31283cb4691c358'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=bbec7802c6948c8626b71a4fe31283cb4691c358'>758892ea343bfcd9c93c87b198dc6ba8d6ce4328</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=272d96a5ab10662691b4ec90c4a66fdbf30ea7ba'>272d96a5ab10662691b4ec90c4a66fdbf30ea7ba</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=bbec7802c6948c8626b71a4fe31283cb4691c358&amp;id2=272d96a5ab10662691b4ec90c4a66fdbf30ea7ba'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: vxlan: lwt: Fix vxlan local traffic.</div><div class='commit-msg'>vxlan driver has bypass for local vxlan traffic, but that
depends on information about all VNIs on local system in
vxlan driver. This is not available in case of LWT.
Therefore following patch disable encap bypass for LWT
vxlan traffic.

Fixes: ee122c79d42 ("vxlan: Flow based tunneling").
Reported-by: Jakub Libosvar &lt;jlibosva@redhat.com&gt;
Signed-off-by: Pravin B Shelar &lt;pshelar@ovn.org&gt;
Acked-by: Jiri Benc &lt;jbenc@redhat.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=bbec7802c6948c8626b71a4fe31283cb4691c358'>Diffstat</a></div><table summary='diffstat' class='diffstat'>