WSL2-Linux-Kernel/drivers/net/ifb.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/* drivers/net/ifb.c:
The purpose of this driver is to provide a device that allows
for sharing of resources:
1) qdiscs/policies that are per device as opposed to system wide.
ifb allows for a device which can be redirected to thus providing
an impression of sharing.
2) Allows for queueing incoming traffic for shaping instead of
dropping.
The original concept is based on what is known as the IMQ
driver initially written by Martin Devera, later rewritten
by Patrick McHardy and then maintained by Andre Correa.
You need the tc action mirror or redirect to feed this device
packets.
Authors: Jamal Hadi Salim (2005)
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
netfilter: Introduce egress hook Support classifying packets with netfilter on egress to satisfy user requirements such as: * outbound security policies for containers (Laura) * filtering and mangling intra-node Direct Server Return (DSR) traffic on a load balancer (Laura) * filtering locally generated traffic coming in through AF_PACKET, such as local ARP traffic generated for clustering purposes or DHCP (Laura; the AF_PACKET plumbing is contained in a follow-up commit) * L2 filtering from ingress and egress for AVB (Audio Video Bridging) and gPTP with nftables (Pablo) * in the future: in-kernel NAT64/NAT46 (Pablo) The egress hook introduced herein complements the ingress hook added by commit e687ad60af09 ("netfilter: add netfilter ingress hook after handle_ing() under unique static key"). A patch for nftables to hook up egress rules from user space has been submitted separately, so users may immediately take advantage of the feature. Alternatively or in addition to netfilter, packets can be classified with traffic control (tc). On ingress, packets are classified first by tc, then by netfilter. On egress, the order is reversed for symmetry. Conceptually, tc and netfilter can be thought of as layers, with netfilter layered above tc. Traffic control is capable of redirecting packets to another interface (man 8 tc-mirred). E.g., an ingress packet may be redirected from the host namespace to a container via a veth connection: tc ingress (host) -> tc egress (veth host) -> tc ingress (veth container) In this case, netfilter egress classifying is not performed when leaving the host namespace! That's because the packet is still on the tc layer. If tc redirects the packet to a physical interface in the host namespace such that it leaves the system, the packet is never subjected to netfilter egress classifying. That is only logical since it hasn't passed through netfilter ingress classifying either. Packets can alternatively be redirected at the netfilter layer using nft fwd. Such a packet *is* subjected to netfilter egress classifying since it has reached the netfilter layer. Internally, the skb->nf_skip_egress flag controls whether netfilter is invoked on egress by __dev_queue_xmit(). Because __dev_queue_xmit() may be called recursively by tunnel drivers such as vxlan, the flag is reverted to false after sch_handle_egress(). This ensures that netfilter is applied both on the overlay and underlying network. Interaction between tc and netfilter is possible by setting and querying skb->mark. If netfilter egress classifying is not enabled on any interface, it is patched out of the data path by way of a static_key and doesn't make a performance difference that is discernible from noise: Before: 1537 1538 1538 1537 1538 1537 Mb/sec After: 1536 1534 1539 1539 1539 1540 Mb/sec Before + tc accept: 1418 1418 1418 1419 1419 1418 Mb/sec After + tc accept: 1419 1424 1418 1419 1422 1420 Mb/sec Before + tc drop: 1620 1619 1619 1619 1620 1620 Mb/sec After + tc drop: 1616 1624 1625 1624 1622 1619 Mb/sec When netfilter egress classifying is enabled on at least one interface, a minimal performance penalty is incurred for every egress packet, even if the interface it's transmitted over doesn't have any netfilter egress rules configured. That is caused by checking dev->nf_hooks_egress against NULL. Measurements were performed on a Core i7-3615QM. Commands to reproduce: ip link add dev foo type dummy ip link set dev foo up modprobe pktgen echo "add_device foo" > /proc/net/pktgen/kpktgend_3 samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh -i foo -n 400000000 -m "11:11:11:11:11:11" -d 1.1.1.1 Accept all traffic with tc: tc qdisc add dev foo clsact tc filter add dev foo egress bpf da bytecode '1,6 0 0 0,' Drop all traffic with tc: tc qdisc add dev foo clsact tc filter add dev foo egress bpf da bytecode '1,6 0 0 2,' Apply this patch when measuring packet drops to avoid errors in dmesg: https://lore.kernel.org/netdev/a73dda33-57f4-95d8-ea51-ed483abd6a7a@iogearbox.net/ Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Laura García Liébana <nevola@gmail.com> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Eric Dumazet <edumazet@google.com> Cc: Thomas Graf <tgraf@suug.ch> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-10-08 23:06:03 +03:00
#include <linux/netfilter_netdev.h>
#include <net/pkt_sched.h>
[NET]: Make the device list and device lookups per namespace. This patch makes most of the generic device layer network namespace safe. This patch makes dev_base_head a network namespace variable, and then it picks up a few associated variables. The functions: dev_getbyhwaddr dev_getfirsthwbytype dev_get_by_flags dev_get_by_name __dev_get_by_name dev_get_by_index __dev_get_by_index dev_ioctl dev_ethtool dev_load wireless_process_ioctl were modified to take a network namespace argument, and deal with it. vlan_ioctl_set and brioctl_set were modified so their hooks will receive a network namespace argument. So basically anthing in the core of the network stack that was affected to by the change of dev_base was modified to handle multiple network namespaces. The rest of the network stack was simply modified to explicitly use &init_net the initial network namespace. This can be fixed when those components of the network stack are modified to handle multiple network namespaces. For now the ifindex generator is left global. Fundametally ifindex numbers are per namespace, or else we will have corner case problems with migration when we get that far. At the same time there are assumptions in the network stack that the ifindex of a network device won't change. Making the ifindex number global seems a good compromise until the network stack can cope with ifindex changes when you change namespaces, and the like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-17 22:56:21 +04:00
#include <net/net_namespace.h>
#define TX_Q_LIMIT 32
struct ifb_q_stats {
u64 packets;
u64 bytes;
struct u64_stats_sync sync;
};
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
struct ifb_q_private {
struct net_device *dev;
struct tasklet_struct ifb_tasklet;
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
int tasklet_pending;
int txqnum;
struct sk_buff_head rq;
struct sk_buff_head tq;
struct ifb_q_stats rx_stats;
struct ifb_q_stats tx_stats;
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
} ____cacheline_aligned_in_smp;
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
struct ifb_dev_private {
struct ifb_q_private *tx_private;
};
/* For ethtools stats. */
struct ifb_q_stats_desc {
char desc[ETH_GSTRING_LEN];
size_t offset;
};
#define IFB_Q_STAT(m) offsetof(struct ifb_q_stats, m)
static const struct ifb_q_stats_desc ifb_q_stats_desc[] = {
{ "packets", IFB_Q_STAT(packets) },
{ "bytes", IFB_Q_STAT(bytes) },
};
#define IFB_Q_STATS_LEN ARRAY_SIZE(ifb_q_stats_desc)
static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev);
static int ifb_open(struct net_device *dev);
static int ifb_close(struct net_device *dev);
static void ifb_update_q_stats(struct ifb_q_stats *stats, int len)
{
u64_stats_update_begin(&stats->sync);
stats->packets++;
stats->bytes += len;
u64_stats_update_end(&stats->sync);
}
static void ifb_ri_tasklet(struct tasklet_struct *t)
{
struct ifb_q_private *txp = from_tasklet(txp, t, ifb_tasklet);
struct netdev_queue *txq;
struct sk_buff *skb;
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
txq = netdev_get_tx_queue(txp->dev, txp->txqnum);
skb = skb_peek(&txp->tq);
if (!skb) {
if (!__netif_tx_trylock(txq))
goto resched;
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
skb_queue_splice_tail_init(&txp->rq, &txp->tq);
__netif_tx_unlock(txq);
}
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
while ((skb = __skb_dequeue(&txp->tq)) != NULL) {
netfilter: Introduce egress hook Support classifying packets with netfilter on egress to satisfy user requirements such as: * outbound security policies for containers (Laura) * filtering and mangling intra-node Direct Server Return (DSR) traffic on a load balancer (Laura) * filtering locally generated traffic coming in through AF_PACKET, such as local ARP traffic generated for clustering purposes or DHCP (Laura; the AF_PACKET plumbing is contained in a follow-up commit) * L2 filtering from ingress and egress for AVB (Audio Video Bridging) and gPTP with nftables (Pablo) * in the future: in-kernel NAT64/NAT46 (Pablo) The egress hook introduced herein complements the ingress hook added by commit e687ad60af09 ("netfilter: add netfilter ingress hook after handle_ing() under unique static key"). A patch for nftables to hook up egress rules from user space has been submitted separately, so users may immediately take advantage of the feature. Alternatively or in addition to netfilter, packets can be classified with traffic control (tc). On ingress, packets are classified first by tc, then by netfilter. On egress, the order is reversed for symmetry. Conceptually, tc and netfilter can be thought of as layers, with netfilter layered above tc. Traffic control is capable of redirecting packets to another interface (man 8 tc-mirred). E.g., an ingress packet may be redirected from the host namespace to a container via a veth connection: tc ingress (host) -> tc egress (veth host) -> tc ingress (veth container) In this case, netfilter egress classifying is not performed when leaving the host namespace! That's because the packet is still on the tc layer. If tc redirects the packet to a physical interface in the host namespace such that it leaves the system, the packet is never subjected to netfilter egress classifying. That is only logical since it hasn't passed through netfilter ingress classifying either. Packets can alternatively be redirected at the netfilter layer using nft fwd. Such a packet *is* subjected to netfilter egress classifying since it has reached the netfilter layer. Internally, the skb->nf_skip_egress flag controls whether netfilter is invoked on egress by __dev_queue_xmit(). Because __dev_queue_xmit() may be called recursively by tunnel drivers such as vxlan, the flag is reverted to false after sch_handle_egress(). This ensures that netfilter is applied both on the overlay and underlying network. Interaction between tc and netfilter is possible by setting and querying skb->mark. If netfilter egress classifying is not enabled on any interface, it is patched out of the data path by way of a static_key and doesn't make a performance difference that is discernible from noise: Before: 1537 1538 1538 1537 1538 1537 Mb/sec After: 1536 1534 1539 1539 1539 1540 Mb/sec Before + tc accept: 1418 1418 1418 1419 1419 1418 Mb/sec After + tc accept: 1419 1424 1418 1419 1422 1420 Mb/sec Before + tc drop: 1620 1619 1619 1619 1620 1620 Mb/sec After + tc drop: 1616 1624 1625 1624 1622 1619 Mb/sec When netfilter egress classifying is enabled on at least one interface, a minimal performance penalty is incurred for every egress packet, even if the interface it's transmitted over doesn't have any netfilter egress rules configured. That is caused by checking dev->nf_hooks_egress against NULL. Measurements were performed on a Core i7-3615QM. Commands to reproduce: ip link add dev foo type dummy ip link set dev foo up modprobe pktgen echo "add_device foo" > /proc/net/pktgen/kpktgend_3 samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh -i foo -n 400000000 -m "11:11:11:11:11:11" -d 1.1.1.1 Accept all traffic with tc: tc qdisc add dev foo clsact tc filter add dev foo egress bpf da bytecode '1,6 0 0 0,' Drop all traffic with tc: tc qdisc add dev foo clsact tc filter add dev foo egress bpf da bytecode '1,6 0 0 2,' Apply this patch when measuring packet drops to avoid errors in dmesg: https://lore.kernel.org/netdev/a73dda33-57f4-95d8-ea51-ed483abd6a7a@iogearbox.net/ Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Laura García Liébana <nevola@gmail.com> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Eric Dumazet <edumazet@google.com> Cc: Thomas Graf <tgraf@suug.ch> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-10-08 23:06:03 +03:00
/* Skip tc and netfilter to prevent redirection loop. */
skb->redirected = 0;
#ifdef CONFIG_NET_CLS_ACT
skb->tc_skip_classify = 1;
#endif
netfilter: Introduce egress hook Support classifying packets with netfilter on egress to satisfy user requirements such as: * outbound security policies for containers (Laura) * filtering and mangling intra-node Direct Server Return (DSR) traffic on a load balancer (Laura) * filtering locally generated traffic coming in through AF_PACKET, such as local ARP traffic generated for clustering purposes or DHCP (Laura; the AF_PACKET plumbing is contained in a follow-up commit) * L2 filtering from ingress and egress for AVB (Audio Video Bridging) and gPTP with nftables (Pablo) * in the future: in-kernel NAT64/NAT46 (Pablo) The egress hook introduced herein complements the ingress hook added by commit e687ad60af09 ("netfilter: add netfilter ingress hook after handle_ing() under unique static key"). A patch for nftables to hook up egress rules from user space has been submitted separately, so users may immediately take advantage of the feature. Alternatively or in addition to netfilter, packets can be classified with traffic control (tc). On ingress, packets are classified first by tc, then by netfilter. On egress, the order is reversed for symmetry. Conceptually, tc and netfilter can be thought of as layers, with netfilter layered above tc. Traffic control is capable of redirecting packets to another interface (man 8 tc-mirred). E.g., an ingress packet may be redirected from the host namespace to a container via a veth connection: tc ingress (host) -> tc egress (veth host) -> tc ingress (veth container) In this case, netfilter egress classifying is not performed when leaving the host namespace! That's because the packet is still on the tc layer. If tc redirects the packet to a physical interface in the host namespace such that it leaves the system, the packet is never subjected to netfilter egress classifying. That is only logical since it hasn't passed through netfilter ingress classifying either. Packets can alternatively be redirected at the netfilter layer using nft fwd. Such a packet *is* subjected to netfilter egress classifying since it has reached the netfilter layer. Internally, the skb->nf_skip_egress flag controls whether netfilter is invoked on egress by __dev_queue_xmit(). Because __dev_queue_xmit() may be called recursively by tunnel drivers such as vxlan, the flag is reverted to false after sch_handle_egress(). This ensures that netfilter is applied both on the overlay and underlying network. Interaction between tc and netfilter is possible by setting and querying skb->mark. If netfilter egress classifying is not enabled on any interface, it is patched out of the data path by way of a static_key and doesn't make a performance difference that is discernible from noise: Before: 1537 1538 1538 1537 1538 1537 Mb/sec After: 1536 1534 1539 1539 1539 1540 Mb/sec Before + tc accept: 1418 1418 1418 1419 1419 1418 Mb/sec After + tc accept: 1419 1424 1418 1419 1422 1420 Mb/sec Before + tc drop: 1620 1619 1619 1619 1620 1620 Mb/sec After + tc drop: 1616 1624 1625 1624 1622 1619 Mb/sec When netfilter egress classifying is enabled on at least one interface, a minimal performance penalty is incurred for every egress packet, even if the interface it's transmitted over doesn't have any netfilter egress rules configured. That is caused by checking dev->nf_hooks_egress against NULL. Measurements were performed on a Core i7-3615QM. Commands to reproduce: ip link add dev foo type dummy ip link set dev foo up modprobe pktgen echo "add_device foo" > /proc/net/pktgen/kpktgend_3 samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh -i foo -n 400000000 -m "11:11:11:11:11:11" -d 1.1.1.1 Accept all traffic with tc: tc qdisc add dev foo clsact tc filter add dev foo egress bpf da bytecode '1,6 0 0 0,' Drop all traffic with tc: tc qdisc add dev foo clsact tc filter add dev foo egress bpf da bytecode '1,6 0 0 2,' Apply this patch when measuring packet drops to avoid errors in dmesg: https://lore.kernel.org/netdev/a73dda33-57f4-95d8-ea51-ed483abd6a7a@iogearbox.net/ Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Laura García Liébana <nevola@gmail.com> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Eric Dumazet <edumazet@google.com> Cc: Thomas Graf <tgraf@suug.ch> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-10-08 23:06:03 +03:00
nf_skip_egress(skb, true);
ifb_update_q_stats(&txp->tx_stats, skb->len);
rcu_read_lock();
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
skb->dev = dev_get_by_index_rcu(dev_net(txp->dev), skb->skb_iif);
if (!skb->dev) {
rcu_read_unlock();
dev_kfree_skb(skb);
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
txp->dev->stats.tx_dropped++;
if (skb_queue_len(&txp->tq) != 0)
goto resched;
break;
}
rcu_read_unlock();
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
skb->skb_iif = txp->dev->ifindex;
if (!skb->from_ingress) {
dev_queue_xmit(skb);
} else {
skb_pull_rcsum(skb, skb->mac_len);
netif_receive_skb(skb);
}
}
if (__netif_tx_trylock(txq)) {
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
skb = skb_peek(&txp->rq);
if (!skb) {
txp->tasklet_pending = 0;
if (netif_tx_queue_stopped(txq))
netif_tx_wake_queue(txq);
} else {
__netif_tx_unlock(txq);
goto resched;
}
__netif_tx_unlock(txq);
} else {
resched:
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
txp->tasklet_pending = 1;
tasklet_schedule(&txp->ifb_tasklet);
}
}
static void ifb_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats)
{
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
struct ifb_dev_private *dp = netdev_priv(dev);
struct ifb_q_private *txp = dp->tx_private;
unsigned int start;
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
u64 packets, bytes;
int i;
for (i = 0; i < dev->num_tx_queues; i++,txp++) {
do {
start = u64_stats_fetch_begin_irq(&txp->rx_stats.sync);
packets = txp->rx_stats.packets;
bytes = txp->rx_stats.bytes;
} while (u64_stats_fetch_retry_irq(&txp->rx_stats.sync, start));
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
stats->rx_packets += packets;
stats->rx_bytes += bytes;
do {
start = u64_stats_fetch_begin_irq(&txp->tx_stats.sync);
packets = txp->tx_stats.packets;
bytes = txp->tx_stats.bytes;
} while (u64_stats_fetch_retry_irq(&txp->tx_stats.sync, start));
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
stats->tx_packets += packets;
stats->tx_bytes += bytes;
}
stats->rx_dropped = dev->stats.rx_dropped;
stats->tx_dropped = dev->stats.tx_dropped;
}
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
static int ifb_dev_init(struct net_device *dev)
{
struct ifb_dev_private *dp = netdev_priv(dev);
struct ifb_q_private *txp;
int i;
txp = kcalloc(dev->num_tx_queues, sizeof(*txp), GFP_KERNEL);
if (!txp)
return -ENOMEM;
dp->tx_private = txp;
for (i = 0; i < dev->num_tx_queues; i++,txp++) {
txp->txqnum = i;
txp->dev = dev;
__skb_queue_head_init(&txp->rq);
__skb_queue_head_init(&txp->tq);
u64_stats_init(&txp->rx_stats.sync);
u64_stats_init(&txp->tx_stats.sync);
tasklet_setup(&txp->ifb_tasklet, ifb_ri_tasklet);
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
netif_tx_start_queue(netdev_get_tx_queue(dev, i));
}
return 0;
}
static void ifb_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
{
u8 *p = buf;
int i, j;
switch (stringset) {
case ETH_SS_STATS:
for (i = 0; i < dev->real_num_rx_queues; i++)
for (j = 0; j < IFB_Q_STATS_LEN; j++)
ethtool_sprintf(&p, "rx_queue_%u_%.18s",
i, ifb_q_stats_desc[j].desc);
for (i = 0; i < dev->real_num_tx_queues; i++)
for (j = 0; j < IFB_Q_STATS_LEN; j++)
ethtool_sprintf(&p, "tx_queue_%u_%.18s",
i, ifb_q_stats_desc[j].desc);
break;
}
}
static int ifb_get_sset_count(struct net_device *dev, int sset)
{
switch (sset) {
case ETH_SS_STATS:
return IFB_Q_STATS_LEN * (dev->real_num_rx_queues +
dev->real_num_tx_queues);
default:
return -EOPNOTSUPP;
}
}
static void ifb_fill_stats_data(u64 **data,
struct ifb_q_stats *q_stats)
{
void *stats_base = (void *)q_stats;
unsigned int start;
size_t offset;
int j;
do {
start = u64_stats_fetch_begin_irq(&q_stats->sync);
for (j = 0; j < IFB_Q_STATS_LEN; j++) {
offset = ifb_q_stats_desc[j].offset;
(*data)[j] = *(u64 *)(stats_base + offset);
}
} while (u64_stats_fetch_retry_irq(&q_stats->sync, start));
*data += IFB_Q_STATS_LEN;
}
static void ifb_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *stats, u64 *data)
{
struct ifb_dev_private *dp = netdev_priv(dev);
struct ifb_q_private *txp;
int i;
for (i = 0; i < dev->real_num_rx_queues; i++) {
txp = dp->tx_private + i;
ifb_fill_stats_data(&data, &txp->rx_stats);
}
for (i = 0; i < dev->real_num_tx_queues; i++) {
txp = dp->tx_private + i;
ifb_fill_stats_data(&data, &txp->tx_stats);
}
}
static const struct net_device_ops ifb_netdev_ops = {
.ndo_open = ifb_open,
.ndo_stop = ifb_close,
.ndo_get_stats64 = ifb_stats64,
.ndo_start_xmit = ifb_xmit,
.ndo_validate_addr = eth_validate_addr,
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
.ndo_init = ifb_dev_init,
};
static const struct ethtool_ops ifb_ethtool_ops = {
.get_strings = ifb_get_strings,
.get_sset_count = ifb_get_sset_count,
.get_ethtool_stats = ifb_get_ethtool_stats,
};
#define IFB_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST | \
NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL | \
NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_CTAG_TX | \
NETIF_F_HW_VLAN_STAG_TX)
ifb: add performance flags Le lundi 03 janvier 2011 à 11:40 -0800, David Miller a écrit : > From: Jarek Poplawski <jarkao2@gmail.com> > Date: Mon, 3 Jan 2011 20:37:03 +0100 > > > On Sun, Jan 02, 2011 at 09:24:36PM +0100, Eric Dumazet wrote: > >> Le mercredi 29 décembre 2010 ?? 00:07 +0100, Jarek Poplawski a écrit : > >> > >> > Ingress is before vlans handler so these features and the > >> > NETIF_F_HW_VLAN_TX flag seem useful for ifb considering > >> > dev_hard_start_xmit() checks. > >> > >> OK, here is v2 of the patch then, thanks everybody. > >> > >> > >> [PATCH v2 net-next-2.6] ifb: add performance flags > >> > >> IFB can use the full set of features flags (NETIF_F_SG | > >> NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to > >> avoid unnecessary split of some packets (GRO for example) > >> > >> Changli suggested to also set vlan_features, > > > > He also suggested more GSO flags of which especially NETIF_F_TSO6 > > seems interesting (wrt GRO)? > > I think at least TSO6 would very much be appropriate here. Yes, why not, I am only wondering why loopback / dummy (and others ?) only set NETIF_F_TSO :) Since I want to play with ECN, I might also add NETIF_F_TSO_ECN ;) For other flags, I really doubt it can matter on ifb ? [PATCH v3 net-next-2.6] ifb: add performance flags IFB can use the full set of features flags (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to avoid unnecessary split of some packets (GRO for example) Changli suggested to also set vlan_features, NETIF_F_TSO6, NETIF_F_TSO_ECN. Jarek suggested to add NETIF_F_HW_VLAN_TX as well. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Changli Gao <xiaosuo@gmail.com> Cc: Jarek Poplawski <jarkao2@gmail.com> Cc: Pawel Staszewski <pstaszewski@itcare.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-03 13:35:22 +03:00
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
static void ifb_dev_free(struct net_device *dev)
{
struct ifb_dev_private *dp = netdev_priv(dev);
struct ifb_q_private *txp = dp->tx_private;
int i;
for (i = 0; i < dev->num_tx_queues; i++,txp++) {
tasklet_kill(&txp->ifb_tasklet);
__skb_queue_purge(&txp->rq);
__skb_queue_purge(&txp->tq);
}
kfree(dp->tx_private);
}
static void ifb_setup(struct net_device *dev)
{
/* Initialize the device structure. */
dev->netdev_ops = &ifb_netdev_ops;
dev->ethtool_ops = &ifb_ethtool_ops;
/* Fill in device structure with ethernet-generic values. */
ether_setup(dev);
dev->tx_queue_len = TX_Q_LIMIT;
ifb: add performance flags Le lundi 03 janvier 2011 à 11:40 -0800, David Miller a écrit : > From: Jarek Poplawski <jarkao2@gmail.com> > Date: Mon, 3 Jan 2011 20:37:03 +0100 > > > On Sun, Jan 02, 2011 at 09:24:36PM +0100, Eric Dumazet wrote: > >> Le mercredi 29 décembre 2010 ?? 00:07 +0100, Jarek Poplawski a écrit : > >> > >> > Ingress is before vlans handler so these features and the > >> > NETIF_F_HW_VLAN_TX flag seem useful for ifb considering > >> > dev_hard_start_xmit() checks. > >> > >> OK, here is v2 of the patch then, thanks everybody. > >> > >> > >> [PATCH v2 net-next-2.6] ifb: add performance flags > >> > >> IFB can use the full set of features flags (NETIF_F_SG | > >> NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to > >> avoid unnecessary split of some packets (GRO for example) > >> > >> Changli suggested to also set vlan_features, > > > > He also suggested more GSO flags of which especially NETIF_F_TSO6 > > seems interesting (wrt GRO)? > > I think at least TSO6 would very much be appropriate here. Yes, why not, I am only wondering why loopback / dummy (and others ?) only set NETIF_F_TSO :) Since I want to play with ECN, I might also add NETIF_F_TSO_ECN ;) For other flags, I really doubt it can matter on ifb ? [PATCH v3 net-next-2.6] ifb: add performance flags IFB can use the full set of features flags (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to avoid unnecessary split of some packets (GRO for example) Changli suggested to also set vlan_features, NETIF_F_TSO6, NETIF_F_TSO_ECN. Jarek suggested to add NETIF_F_HW_VLAN_TX as well. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Changli Gao <xiaosuo@gmail.com> Cc: Jarek Poplawski <jarkao2@gmail.com> Cc: Pawel Staszewski <pstaszewski@itcare.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-03 13:35:22 +03:00
dev->features |= IFB_FEATURES;
dev->hw_features |= dev->features;
dev->hw_enc_features |= dev->features;
dev->vlan_features |= IFB_FEATURES & ~(NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX);
ifb: add performance flags Le lundi 03 janvier 2011 à 11:40 -0800, David Miller a écrit : > From: Jarek Poplawski <jarkao2@gmail.com> > Date: Mon, 3 Jan 2011 20:37:03 +0100 > > > On Sun, Jan 02, 2011 at 09:24:36PM +0100, Eric Dumazet wrote: > >> Le mercredi 29 décembre 2010 ?? 00:07 +0100, Jarek Poplawski a écrit : > >> > >> > Ingress is before vlans handler so these features and the > >> > NETIF_F_HW_VLAN_TX flag seem useful for ifb considering > >> > dev_hard_start_xmit() checks. > >> > >> OK, here is v2 of the patch then, thanks everybody. > >> > >> > >> [PATCH v2 net-next-2.6] ifb: add performance flags > >> > >> IFB can use the full set of features flags (NETIF_F_SG | > >> NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to > >> avoid unnecessary split of some packets (GRO for example) > >> > >> Changli suggested to also set vlan_features, > > > > He also suggested more GSO flags of which especially NETIF_F_TSO6 > > seems interesting (wrt GRO)? > > I think at least TSO6 would very much be appropriate here. Yes, why not, I am only wondering why loopback / dummy (and others ?) only set NETIF_F_TSO :) Since I want to play with ECN, I might also add NETIF_F_TSO_ECN ;) For other flags, I really doubt it can matter on ifb ? [PATCH v3 net-next-2.6] ifb: add performance flags IFB can use the full set of features flags (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to avoid unnecessary split of some packets (GRO for example) Changli suggested to also set vlan_features, NETIF_F_TSO6, NETIF_F_TSO_ECN. Jarek suggested to add NETIF_F_HW_VLAN_TX as well. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Changli Gao <xiaosuo@gmail.com> Cc: Jarek Poplawski <jarkao2@gmail.com> Cc: Pawel Staszewski <pstaszewski@itcare.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-03 13:35:22 +03:00
dev->flags |= IFF_NOARP;
dev->flags &= ~IFF_MULTICAST;
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
netif_keep_dst(dev);
eth_hw_addr_random(dev);
net: Fix inconsistent teardown and release of private netdev state. Network devices can allocate reasources and private memory using netdev_ops->ndo_init(). However, the release of these resources can occur in one of two different places. Either netdev_ops->ndo_uninit() or netdev->destructor(). The decision of which operation frees the resources depends upon whether it is necessary for all netdev refs to be released before it is safe to perform the freeing. netdev_ops->ndo_uninit() presumably can occur right after the NETDEV_UNREGISTER notifier completes and the unicast and multicast address lists are flushed. netdev->destructor(), on the other hand, does not run until the netdev references all go away. Further complicating the situation is that netdev->destructor() almost universally does also a free_netdev(). This creates a problem for the logic in register_netdevice(). Because all callers of register_netdevice() manage the freeing of the netdev, and invoke free_netdev(dev) if register_netdevice() fails. If netdev_ops->ndo_init() succeeds, but something else fails inside of register_netdevice(), it does call ndo_ops->ndo_uninit(). But it is not able to invoke netdev->destructor(). This is because netdev->destructor() will do a free_netdev() and then the caller of register_netdevice() will do the same. However, this means that the resources that would normally be released by netdev->destructor() will not be. Over the years drivers have added local hacks to deal with this, by invoking their destructor parts by hand when register_netdevice() fails. Many drivers do not try to deal with this, and instead we have leaks. Let's close this hole by formalizing the distinction between what private things need to be freed up by netdev->destructor() and whether the driver needs unregister_netdevice() to perform the free_netdev(). netdev->priv_destructor() performs all actions to free up the private resources that used to be freed by netdev->destructor(), except for free_netdev(). netdev->needs_free_netdev is a boolean that indicates whether free_netdev() should be done at the end of unregister_netdevice(). Now, register_netdevice() can sanely release all resources after ndo_ops->ndo_init() succeeds, by invoking both ndo_ops->ndo_uninit() and netdev->priv_destructor(). And at the end of unregister_netdevice(), we invoke netdev->priv_destructor() and optionally call free_netdev(). Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-08 19:52:56 +03:00
dev->needs_free_netdev = true;
dev->priv_destructor = ifb_dev_free;
dev->min_mtu = 0;
dev->max_mtu = 0;
}
static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev)
{
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
struct ifb_dev_private *dp = netdev_priv(dev);
struct ifb_q_private *txp = dp->tx_private + skb_get_queue_mapping(skb);
ifb_update_q_stats(&txp->rx_stats, skb->len);
if (!skb->redirected || !skb->skb_iif) {
dev_kfree_skb(skb);
dev->stats.rx_dropped++;
return NETDEV_TX_OK;
}
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
if (skb_queue_len(&txp->rq) >= dev->tx_queue_len)
netif_tx_stop_queue(netdev_get_tx_queue(dev, txp->txqnum));
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
__skb_queue_tail(&txp->rq, skb);
if (!txp->tasklet_pending) {
txp->tasklet_pending = 1;
tasklet_schedule(&txp->ifb_tasklet);
}
return NETDEV_TX_OK;
}
static int ifb_close(struct net_device *dev)
{
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
netif_tx_stop_all_queues(dev);
return 0;
}
static int ifb_open(struct net_device *dev)
{
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
netif_tx_start_all_queues(dev);
return 0;
}
static int ifb_validate(struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
if (tb[IFLA_ADDRESS]) {
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
return -EINVAL;
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
return -EADDRNOTAVAIL;
}
return 0;
}
static struct rtnl_link_ops ifb_link_ops __read_mostly = {
.kind = "ifb",
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
.priv_size = sizeof(struct ifb_dev_private),
.setup = ifb_setup,
.validate = ifb_validate,
};
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
/* Number of ifb devices to be set up by this module.
* Note that these legacy devices have one queue.
* Prefer something like : ip link add ifb10 numtxqueues 8 type ifb
*/
static int numifbs = 2;
module_param(numifbs, int, 0);
MODULE_PARM_DESC(numifbs, "Number of ifb devices");
static int __init ifb_init_one(int index)
{
struct net_device *dev_ifb;
int err;
ifb: add multiqueue operation Add multiqueue capabilities to ifb netdevice. This removes last bottleneck for ingress when mq qdisc can be used to shard load from multiple RX queues on physical device. Tested: # netem based setup, installed at receiver side ETH=eth0 IFB=ifb10 EST="est 1sec 4sec" # Optional rate estimator RTT_HALF=2ms #REORDER=20us #LOSS="loss 1" TXQ=8 ip link add ifb10 numtxqueues $TXQ type ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB tc qdisc del dev $IFB root 2>/dev/null tc qdisc add dev $IFB root handle 1: mq for i in `seq 1 $TXQ` do slot=$( printf %x $(( i )) ) tc qd add dev $IFB parent 1:$slot $EST netem \ limit 100000 delay $RTT_HALF $REORDER $LOSS done lpaa24:~# tc -s -d qd sh dev ifb10 qdisc mq 1: root Sent 316544766 bytes 5265927 pkt (dropped 0, overlimits 0 requeues 0) backlog 98880b 1648p requeues 0 qdisc netem 8002: parent 1:1 limit 100000 delay 2.0ms Sent 39601416 bytes 658721 pkt (dropped 0, overlimits 0 requeues 0) rate 38235Kbit 79657pps backlog 12240b 204p requeues 0 qdisc netem 8003: parent 1:2 limit 100000 delay 2.0ms Sent 39472866 bytes 657227 pkt (dropped 0, overlimits 0 requeues 0) rate 38234Kbit 79655pps backlog 10620b 176p requeues 0 qdisc netem 8004: parent 1:3 limit 100000 delay 2.0ms Sent 39703417 bytes 659699 pkt (dropped 0, overlimits 0 requeues 0) rate 38320Kbit 79831pps backlog 12780b 213p requeues 0 qdisc netem 8005: parent 1:4 limit 100000 delay 2.0ms Sent 39565149 bytes 658011 pkt (dropped 0, overlimits 0 requeues 0) rate 38174Kbit 79530pps backlog 11880b 198p requeues 0 qdisc netem 8006: parent 1:5 limit 100000 delay 2.0ms Sent 39506078 bytes 657354 pkt (dropped 0, overlimits 0 requeues 0) rate 38195Kbit 79571pps backlog 12480b 208p requeues 0 qdisc netem 8007: parent 1:6 limit 100000 delay 2.0ms Sent 39675994 bytes 658849 pkt (dropped 0, overlimits 0 requeues 0) rate 38323Kbit 79838pps backlog 12600b 210p requeues 0 qdisc netem 8008: parent 1:7 limit 100000 delay 2.0ms Sent 39532042 bytes 658367 pkt (dropped 0, overlimits 0 requeues 0) rate 38177Kbit 79536pps backlog 13140b 219p requeues 0 qdisc netem 8009: parent 1:8 limit 100000 delay 2.0ms Sent 39488164 bytes 657705 pkt (dropped 0, overlimits 0 requeues 0) rate 38192Kbit 79568pps backlog 13Kb 222p requeues 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-06 23:05:28 +03:00
dev_ifb = alloc_netdev(sizeof(struct ifb_dev_private), "ifb%d",
NET_NAME_UNKNOWN, ifb_setup);
if (!dev_ifb)
return -ENOMEM;
dev_ifb->rtnl_link_ops = &ifb_link_ops;
err = register_netdevice(dev_ifb);
if (err < 0)
goto err;
return 0;
err:
free_netdev(dev_ifb);
return err;
}
static int __init ifb_init_module(void)
{
int i, err;
down_write(&pernet_ops_rwsem);
rtnl_lock();
err = __rtnl_link_register(&ifb_link_ops);
if (err < 0)
goto out;
for (i = 0; i < numifbs && !err; i++) {
err = ifb_init_one(i);
cond_resched();
}
if (err)
__rtnl_link_unregister(&ifb_link_ops);
out:
rtnl_unlock();
up_write(&pernet_ops_rwsem);
return err;
}
static void __exit ifb_cleanup_module(void)
{
rtnl_link_unregister(&ifb_link_ops);
}
module_init(ifb_init_module);
module_exit(ifb_cleanup_module);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jamal Hadi Salim");
MODULE_ALIAS_RTNL_LINK("ifb");