kernel: backport flow dissector batman-adv support
Improves performance on multicore systems handling batman-adv traffic Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
@@ -0,0 +1,36 @@
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From: Sven Eckelmann <sven.eckelmann@openmesh.com>
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Date: Thu, 21 Dec 2017 10:17:38 +0100
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Subject: [PATCH] batman-adv: Let packet.h include its headers directly
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The headers used by packet.h should also be included by it directly. main.h
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is currently dealing with it in batman-adv, but this will no longer work
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when this header is moved to include/uapi/linux/.
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Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/net/batman-adv/main.h
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+++ b/net/batman-adv/main.h
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@@ -184,10 +184,8 @@ enum batadv_uev_type {
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/* Kernel headers */
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-#include <linux/bitops.h> /* for packet.h */
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#include <linux/compiler.h>
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#include <linux/etherdevice.h>
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-#include <linux/if_ether.h> /* for packet.h */
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#include <linux/if_vlan.h>
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#include <linux/jiffies.h>
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#include <linux/percpu.h>
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--- a/net/batman-adv/packet.h
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+++ b/net/batman-adv/packet.h
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@@ -19,6 +19,8 @@
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#define _NET_BATMAN_ADV_PACKET_H_
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#include <asm/byteorder.h>
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+#include <linux/bitops.h>
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+#include <linux/if_ether.h>
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#include <linux/types.h>
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#define batadv_tp_is_error(n) ((u8)(n) > 127 ? 1 : 0)
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@@ -0,0 +1,72 @@
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From: Sven Eckelmann <sven.eckelmann@openmesh.com>
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Date: Thu, 21 Dec 2017 10:17:39 +0100
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Subject: [PATCH] batman-adv: Remove usage of BIT(x) in packet.h
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The BIT(x) macro is no longer available for uapi headers because it is
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defined outside of it (linux/bitops.h). The use of it must therefore be
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avoided and replaced by an appropriate other representation.
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Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/net/batman-adv/packet.h
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+++ b/net/batman-adv/packet.h
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@@ -19,7 +19,6 @@
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#define _NET_BATMAN_ADV_PACKET_H_
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#include <asm/byteorder.h>
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-#include <linux/bitops.h>
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#include <linux/if_ether.h>
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#include <linux/types.h>
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@@ -85,9 +84,9 @@ enum batadv_subtype {
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* one hop neighbor on the interface where it was originally received.
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*/
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enum batadv_iv_flags {
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- BATADV_NOT_BEST_NEXT_HOP = BIT(0),
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- BATADV_PRIMARIES_FIRST_HOP = BIT(1),
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- BATADV_DIRECTLINK = BIT(2),
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+ BATADV_NOT_BEST_NEXT_HOP = 1UL << 0,
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+ BATADV_PRIMARIES_FIRST_HOP = 1UL << 1,
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+ BATADV_DIRECTLINK = 1UL << 2,
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};
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/* ICMP message types */
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@@ -108,9 +107,9 @@ enum batadv_icmp_packettype {
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* @BATADV_MCAST_WANT_ALL_IPV6: we want all IPv6 multicast packets
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*/
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enum batadv_mcast_flags {
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- BATADV_MCAST_WANT_ALL_UNSNOOPABLES = BIT(0),
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- BATADV_MCAST_WANT_ALL_IPV4 = BIT(1),
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- BATADV_MCAST_WANT_ALL_IPV6 = BIT(2),
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+ BATADV_MCAST_WANT_ALL_UNSNOOPABLES = 1UL << 0,
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+ BATADV_MCAST_WANT_ALL_IPV4 = 1UL << 1,
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+ BATADV_MCAST_WANT_ALL_IPV6 = 1UL << 2,
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};
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/* tt data subtypes */
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@@ -124,10 +123,10 @@ enum batadv_mcast_flags {
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* @BATADV_TT_FULL_TABLE: contains full table to replace existing table
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*/
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enum batadv_tt_data_flags {
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- BATADV_TT_OGM_DIFF = BIT(0),
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- BATADV_TT_REQUEST = BIT(1),
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- BATADV_TT_RESPONSE = BIT(2),
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- BATADV_TT_FULL_TABLE = BIT(4),
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+ BATADV_TT_OGM_DIFF = 1UL << 0,
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+ BATADV_TT_REQUEST = 1UL << 1,
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+ BATADV_TT_RESPONSE = 1UL << 2,
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+ BATADV_TT_FULL_TABLE = 1UL << 4,
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};
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/**
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@@ -135,7 +134,7 @@ enum batadv_tt_data_flags {
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* @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not
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*/
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enum batadv_vlan_flags {
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- BATADV_VLAN_HAS_TAG = BIT(15),
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+ BATADV_VLAN_HAS_TAG = 1UL << 15,
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};
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/* claim frame types for the bridge loop avoidance */
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@@ -0,0 +1,386 @@
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From: Sven Eckelmann <sven.eckelmann@openmesh.com>
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Date: Thu, 21 Dec 2017 10:17:40 +0100
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Subject: [PATCH] batman-adv: Remove kernel fixed width types in packet.h
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The uapi headers use the __u8/__u16/... version of the fixed width types
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instead of u8/u16/... The use of the latter must be avoided before
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packet.h is copied to include/uapi/linux/.
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Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/net/batman-adv/packet.h
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+++ b/net/batman-adv/packet.h
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@@ -22,7 +22,7 @@
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#include <linux/if_ether.h>
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#include <linux/types.h>
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-#define batadv_tp_is_error(n) ((u8)(n) > 127 ? 1 : 0)
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+#define batadv_tp_is_error(n) ((__u8)(n) > 127 ? 1 : 0)
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/**
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* enum batadv_packettype - types for batman-adv encapsulated packets
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@@ -169,8 +169,8 @@ enum batadv_tvlv_type {
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* transport the claim type and the group id
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*/
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struct batadv_bla_claim_dst {
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- u8 magic[3]; /* FF:43:05 */
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- u8 type; /* bla_claimframe */
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+ __u8 magic[3]; /* FF:43:05 */
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+ __u8 type; /* bla_claimframe */
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__be16 group; /* group id */
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};
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@@ -190,15 +190,15 @@ struct batadv_bla_claim_dst {
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* @tvlv_len: length of tvlv data following the ogm header
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*/
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struct batadv_ogm_packet {
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- u8 packet_type;
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- u8 version;
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- u8 ttl;
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- u8 flags;
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 ttl;
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+ __u8 flags;
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__be32 seqno;
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- u8 orig[ETH_ALEN];
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- u8 prev_sender[ETH_ALEN];
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- u8 reserved;
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- u8 tq;
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+ __u8 orig[ETH_ALEN];
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+ __u8 prev_sender[ETH_ALEN];
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+ __u8 reserved;
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+ __u8 tq;
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__be16 tvlv_len;
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/* __packed is not needed as the struct size is divisible by 4,
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* and the largest data type in this struct has a size of 4.
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@@ -219,12 +219,12 @@ struct batadv_ogm_packet {
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* @throughput: the currently flooded path throughput
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*/
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struct batadv_ogm2_packet {
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- u8 packet_type;
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- u8 version;
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- u8 ttl;
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- u8 flags;
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 ttl;
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+ __u8 flags;
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__be32 seqno;
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- u8 orig[ETH_ALEN];
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+ __u8 orig[ETH_ALEN];
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__be16 tvlv_len;
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__be32 throughput;
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/* __packed is not needed as the struct size is divisible by 4,
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@@ -243,9 +243,9 @@ struct batadv_ogm2_packet {
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* @elp_interval: currently used ELP sending interval in ms
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*/
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struct batadv_elp_packet {
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- u8 packet_type;
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- u8 version;
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- u8 orig[ETH_ALEN];
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 orig[ETH_ALEN];
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__be32 seqno;
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__be32 elp_interval;
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};
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@@ -268,14 +268,14 @@ struct batadv_elp_packet {
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* members are padded the same way as they are in real packets.
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*/
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struct batadv_icmp_header {
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- u8 packet_type;
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- u8 version;
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- u8 ttl;
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- u8 msg_type; /* see ICMP message types above */
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- u8 dst[ETH_ALEN];
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- u8 orig[ETH_ALEN];
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- u8 uid;
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- u8 align[3];
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 ttl;
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+ __u8 msg_type; /* see ICMP message types above */
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+ __u8 dst[ETH_ALEN];
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+ __u8 orig[ETH_ALEN];
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+ __u8 uid;
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+ __u8 align[3];
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};
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/**
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@@ -291,14 +291,14 @@ struct batadv_icmp_header {
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* @seqno: ICMP sequence number
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*/
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struct batadv_icmp_packet {
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- u8 packet_type;
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- u8 version;
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- u8 ttl;
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- u8 msg_type; /* see ICMP message types above */
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- u8 dst[ETH_ALEN];
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- u8 orig[ETH_ALEN];
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- u8 uid;
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- u8 reserved;
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 ttl;
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+ __u8 msg_type; /* see ICMP message types above */
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+ __u8 dst[ETH_ALEN];
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+ __u8 orig[ETH_ALEN];
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+ __u8 uid;
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+ __u8 reserved;
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__be16 seqno;
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};
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@@ -320,15 +320,15 @@ struct batadv_icmp_packet {
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* store it using network order
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*/
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struct batadv_icmp_tp_packet {
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- u8 packet_type;
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- u8 version;
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- u8 ttl;
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- u8 msg_type; /* see ICMP message types above */
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- u8 dst[ETH_ALEN];
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- u8 orig[ETH_ALEN];
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- u8 uid;
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- u8 subtype;
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- u8 session[2];
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 ttl;
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+ __u8 msg_type; /* see ICMP message types above */
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+ __u8 dst[ETH_ALEN];
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+ __u8 orig[ETH_ALEN];
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+ __u8 uid;
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+ __u8 subtype;
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+ __u8 session[2];
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__be32 seqno;
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__be32 timestamp;
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};
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@@ -359,16 +359,16 @@ enum batadv_icmp_tp_subtype {
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* @rr: route record array
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*/
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struct batadv_icmp_packet_rr {
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- u8 packet_type;
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- u8 version;
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- u8 ttl;
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- u8 msg_type; /* see ICMP message types above */
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- u8 dst[ETH_ALEN];
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- u8 orig[ETH_ALEN];
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- u8 uid;
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- u8 rr_cur;
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 ttl;
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+ __u8 msg_type; /* see ICMP message types above */
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+ __u8 dst[ETH_ALEN];
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+ __u8 orig[ETH_ALEN];
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+ __u8 uid;
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+ __u8 rr_cur;
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__be16 seqno;
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- u8 rr[BATADV_RR_LEN][ETH_ALEN];
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+ __u8 rr[BATADV_RR_LEN][ETH_ALEN];
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};
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#define BATADV_ICMP_MAX_PACKET_SIZE sizeof(struct batadv_icmp_packet_rr)
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@@ -394,11 +394,11 @@ struct batadv_icmp_packet_rr {
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* @dest: originator destination of the unicast packet
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*/
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struct batadv_unicast_packet {
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- u8 packet_type;
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- u8 version;
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- u8 ttl;
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- u8 ttvn; /* destination translation table version number */
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- u8 dest[ETH_ALEN];
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+ __u8 packet_type;
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+ __u8 version;
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+ __u8 ttl;
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+ __u8 ttvn; /* destination translation table version number */
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+ __u8 dest[ETH_ALEN];
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/* "4 bytes boundary + 2 bytes" long to make the payload after the
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* following ethernet header again 4 bytes boundary aligned
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*/
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@@ -413,9 +413,9 @@ struct batadv_unicast_packet {
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*/
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struct batadv_unicast_4addr_packet {
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struct batadv_unicast_packet u;
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- u8 src[ETH_ALEN];
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- u8 subtype;
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- u8 reserved;
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+ __u8 src[ETH_ALEN];
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+ __u8 subtype;
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+ __u8 reserved;
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/* "4 bytes boundary + 2 bytes" long to make the payload after the
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* following ethernet header again 4 bytes boundary aligned
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*/
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@@ -435,22 +435,22 @@ struct batadv_unicast_4addr_packet {
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* @total_size: size of the merged packet
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*/
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struct batadv_frag_packet {
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- u8 packet_type;
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- u8 version; /* batman version field */
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- u8 ttl;
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+ __u8 packet_type;
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+ __u8 version; /* batman version field */
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+ __u8 ttl;
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#if defined(__BIG_ENDIAN_BITFIELD)
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- u8 no:4;
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- u8 priority:3;
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- u8 reserved:1;
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+ __u8 no:4;
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+ __u8 priority:3;
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+ __u8 reserved:1;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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- u8 reserved:1;
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- u8 priority:3;
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- u8 no:4;
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+ __u8 reserved:1;
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+ __u8 priority:3;
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+ __u8 no:4;
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#else
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#error "unknown bitfield endianness"
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#endif
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- u8 dest[ETH_ALEN];
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- u8 orig[ETH_ALEN];
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+ __u8 dest[ETH_ALEN];
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+ __u8 orig[ETH_ALEN];
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__be16 seqno;
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__be16 total_size;
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};
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@@ -465,12 +465,12 @@ struct batadv_frag_packet {
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* @orig: originator of the broadcast packet
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*/
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struct batadv_bcast_packet {
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- u8 packet_type;
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- u8 version; /* batman version field */
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- u8 ttl;
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- u8 reserved;
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+ __u8 packet_type;
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+ __u8 version; /* batman version field */
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+ __u8 ttl;
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+ __u8 reserved;
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__be32 seqno;
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- u8 orig[ETH_ALEN];
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+ __u8 orig[ETH_ALEN];
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/* "4 bytes boundary + 2 bytes" long to make the payload after the
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* following ethernet header again 4 bytes boundary aligned
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*/
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@@ -494,19 +494,19 @@ struct batadv_bcast_packet {
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* @coded_len: length of network coded part of the payload
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*/
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struct batadv_coded_packet {
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- u8 packet_type;
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- u8 version; /* batman version field */
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- u8 ttl;
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- u8 first_ttvn;
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- /* u8 first_dest[ETH_ALEN]; - saved in mac header destination */
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- u8 first_source[ETH_ALEN];
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- u8 first_orig_dest[ETH_ALEN];
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+ __u8 packet_type;
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+ __u8 version; /* batman version field */
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+ __u8 ttl;
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+ __u8 first_ttvn;
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+ /* __u8 first_dest[ETH_ALEN]; - saved in mac header destination */
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+ __u8 first_source[ETH_ALEN];
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+ __u8 first_orig_dest[ETH_ALEN];
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__be32 first_crc;
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- u8 second_ttl;
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- u8 second_ttvn;
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- u8 second_dest[ETH_ALEN];
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- u8 second_source[ETH_ALEN];
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- u8 second_orig_dest[ETH_ALEN];
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+ __u8 second_ttl;
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+ __u8 second_ttvn;
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+ __u8 second_dest[ETH_ALEN];
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+ __u8 second_source[ETH_ALEN];
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+ __u8 second_orig_dest[ETH_ALEN];
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__be32 second_crc;
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__be16 coded_len;
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};
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@@ -525,14 +525,14 @@ struct batadv_coded_packet {
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* @align: 2 bytes to align the header to a 4 byte boundary
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*/
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struct batadv_unicast_tvlv_packet {
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- u8 packet_type;
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- u8 version; /* batman version field */
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- u8 ttl;
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- u8 reserved;
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- u8 dst[ETH_ALEN];
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- u8 src[ETH_ALEN];
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+ __u8 packet_type;
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+ __u8 version; /* batman version field */
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+ __u8 ttl;
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+ __u8 reserved;
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+ __u8 dst[ETH_ALEN];
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+ __u8 src[ETH_ALEN];
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__be16 tvlv_len;
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- u16 align;
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+ __u16 align;
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};
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||||
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||||
/**
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@@ -542,8 +542,8 @@ struct batadv_unicast_tvlv_packet {
|
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* @len: tvlv container length
|
||||
*/
|
||||
struct batadv_tvlv_hdr {
|
||||
- u8 type;
|
||||
- u8 version;
|
||||
+ __u8 type;
|
||||
+ __u8 version;
|
||||
__be16 len;
|
||||
};
|
||||
|
||||
@@ -566,8 +566,8 @@ struct batadv_tvlv_gateway_data {
|
||||
* one batadv_tvlv_tt_vlan_data object per announced vlan
|
||||
*/
|
||||
struct batadv_tvlv_tt_data {
|
||||
- u8 flags;
|
||||
- u8 ttvn;
|
||||
+ __u8 flags;
|
||||
+ __u8 ttvn;
|
||||
__be16 num_vlan;
|
||||
};
|
||||
|
||||
@@ -581,7 +581,7 @@ struct batadv_tvlv_tt_data {
|
||||
struct batadv_tvlv_tt_vlan_data {
|
||||
__be32 crc;
|
||||
__be16 vid;
|
||||
- u16 reserved;
|
||||
+ __u16 reserved;
|
||||
};
|
||||
|
||||
/**
|
||||
@@ -593,9 +593,9 @@ struct batadv_tvlv_tt_vlan_data {
|
||||
* @vid: VLAN identifier
|
||||
*/
|
||||
struct batadv_tvlv_tt_change {
|
||||
- u8 flags;
|
||||
- u8 reserved[3];
|
||||
- u8 addr[ETH_ALEN];
|
||||
+ __u8 flags;
|
||||
+ __u8 reserved[3];
|
||||
+ __u8 addr[ETH_ALEN];
|
||||
__be16 vid;
|
||||
};
|
||||
|
||||
@@ -605,7 +605,7 @@ struct batadv_tvlv_tt_change {
|
||||
* @vid: VLAN identifier
|
||||
*/
|
||||
struct batadv_tvlv_roam_adv {
|
||||
- u8 client[ETH_ALEN];
|
||||
+ __u8 client[ETH_ALEN];
|
||||
__be16 vid;
|
||||
};
|
||||
|
||||
@@ -615,8 +615,8 @@ struct batadv_tvlv_roam_adv {
|
||||
* @reserved: reserved field
|
||||
*/
|
||||
struct batadv_tvlv_mcast_data {
|
||||
- u8 flags;
|
||||
- u8 reserved[3];
|
||||
+ __u8 flags;
|
||||
+ __u8 reserved[3];
|
||||
};
|
||||
|
||||
#endif /* _NET_BATMAN_ADV_PACKET_H_ */
|
||||
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,108 @@
|
||||
From: Sven Eckelmann <sven.eckelmann@openmesh.com>
|
||||
Date: Thu, 21 Dec 2017 10:17:42 +0100
|
||||
Subject: [PATCH] flow_dissector: Parse batman-adv unicast headers
|
||||
|
||||
The batman-adv unicast packets contain a full layer 2 frame in encapsulated
|
||||
form. The flow dissector must therefore be able to parse the batman-adv
|
||||
unicast header to reach the layer 2+3 information.
|
||||
|
||||
+--------------------+
|
||||
| ip(v6)hdr |
|
||||
+--------------------+
|
||||
| inner ethhdr |
|
||||
+--------------------+
|
||||
| batadv unicast hdr |
|
||||
+--------------------+
|
||||
| outer ethhdr |
|
||||
+--------------------+
|
||||
|
||||
The obtained information from the upper layer can then be used by RPS to
|
||||
schedule the processing on separate cores. This allows better distribution
|
||||
of multiple flows from the same neighbor to different cores.
|
||||
|
||||
Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
|
||||
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
|
||||
Acked-by: Willem de Bruijn <willemb@google.com>
|
||||
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||||
---
|
||||
|
||||
--- a/net/core/flow_dissector.c
|
||||
+++ b/net/core/flow_dissector.c
|
||||
@@ -22,6 +22,7 @@
|
||||
#include <linux/tcp.h>
|
||||
#include <net/flow_dissector.h>
|
||||
#include <scsi/fc/fc_fcoe.h>
|
||||
+#include <uapi/linux/batadv_packet.h>
|
||||
|
||||
static void dissector_set_key(struct flow_dissector *flow_dissector,
|
||||
enum flow_dissector_key_id key_id)
|
||||
@@ -338,6 +339,57 @@ __skb_flow_dissect_gre(const struct sk_b
|
||||
return FLOW_DISSECT_RET_PROTO_AGAIN;
|
||||
}
|
||||
|
||||
+/**
|
||||
+ * __skb_flow_dissect_batadv() - dissect batman-adv header
|
||||
+ * @skb: sk_buff to with the batman-adv header
|
||||
+ * @key_control: flow dissectors control key
|
||||
+ * @data: raw buffer pointer to the packet, if NULL use skb->data
|
||||
+ * @p_proto: pointer used to update the protocol to process next
|
||||
+ * @p_nhoff: pointer used to update inner network header offset
|
||||
+ * @hlen: packet header length
|
||||
+ * @flags: any combination of FLOW_DISSECTOR_F_*
|
||||
+ *
|
||||
+ * ETH_P_BATMAN packets are tried to be dissected. Only
|
||||
+ * &struct batadv_unicast packets are actually processed because they contain an
|
||||
+ * inner ethernet header and are usually followed by actual network header. This
|
||||
+ * allows the flow dissector to continue processing the packet.
|
||||
+ *
|
||||
+ * Return: FLOW_DISSECT_RET_PROTO_AGAIN when &struct batadv_unicast was found,
|
||||
+ * FLOW_DISSECT_RET_OUT_GOOD when dissector should stop after encapsulation,
|
||||
+ * otherwise FLOW_DISSECT_RET_OUT_BAD
|
||||
+ */
|
||||
+static enum flow_dissect_ret
|
||||
+__skb_flow_dissect_batadv(const struct sk_buff *skb,
|
||||
+ struct flow_dissector_key_control *key_control,
|
||||
+ void *data, __be16 *p_proto, int *p_nhoff, int hlen,
|
||||
+ unsigned int flags)
|
||||
+{
|
||||
+ struct {
|
||||
+ struct batadv_unicast_packet batadv_unicast;
|
||||
+ struct ethhdr eth;
|
||||
+ } *hdr, _hdr;
|
||||
+
|
||||
+ hdr = __skb_header_pointer(skb, *p_nhoff, sizeof(_hdr), data, hlen,
|
||||
+ &_hdr);
|
||||
+ if (!hdr)
|
||||
+ return FLOW_DISSECT_RET_OUT_BAD;
|
||||
+
|
||||
+ if (hdr->batadv_unicast.version != BATADV_COMPAT_VERSION)
|
||||
+ return FLOW_DISSECT_RET_OUT_BAD;
|
||||
+
|
||||
+ if (hdr->batadv_unicast.packet_type != BATADV_UNICAST)
|
||||
+ return FLOW_DISSECT_RET_OUT_BAD;
|
||||
+
|
||||
+ *p_proto = hdr->eth.h_proto;
|
||||
+ *p_nhoff += sizeof(*hdr);
|
||||
+
|
||||
+ key_control->flags |= FLOW_DIS_ENCAPSULATION;
|
||||
+ if (flags & FLOW_DISSECTOR_F_STOP_AT_ENCAP)
|
||||
+ return FLOW_DISSECT_RET_OUT_GOOD;
|
||||
+
|
||||
+ return FLOW_DISSECT_RET_PROTO_AGAIN;
|
||||
+}
|
||||
+
|
||||
static void
|
||||
__skb_flow_dissect_tcp(const struct sk_buff *skb,
|
||||
struct flow_dissector *flow_dissector,
|
||||
@@ -717,6 +769,11 @@ proto_again:
|
||||
nhoff, hlen);
|
||||
break;
|
||||
|
||||
+ case htons(ETH_P_BATMAN):
|
||||
+ fdret = __skb_flow_dissect_batadv(skb, key_control, data,
|
||||
+ &proto, &nhoff, hlen, flags);
|
||||
+ break;
|
||||
+
|
||||
default:
|
||||
fdret = FLOW_DISSECT_RET_OUT_BAD;
|
||||
break;
|
||||
Reference in New Issue
Block a user