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/linux/net/core/
H A Dgro.c3 #include <net/gro.h>
252 static void gro_complete(struct gro_node *gro, struct sk_buff *skb) in gro_complete() argument
266 /* NICs can feed encapsulated packets into GRO */ in gro_complete()
287 gro_normal_one(gro, skb, NAPI_GRO_CB(skb)->count); in gro_complete()
290 static void __gro_flush_chain(struct gro_node *gro, u32 index, bool flush_old) in __gro_flush_chain() argument
292 struct list_head *head = &gro->hash[index].list; in __gro_flush_chain()
299 gro_complete(gro, skb); in __gro_flush_chain()
300 gro->hash[index].count--; in __gro_flush_chain()
303 if (!gro->hash[index].count) in __gro_flush_chain()
304 __clear_bit(index, &gro->bitmask); in __gro_flush_chain()
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/linux/tools/testing/selftests/net/
H A Dudpgro.sh39 ip netns exec "${PEER_NS}" ethtool -K veth1 gro on
91 # fool the GRO engine changing the destination address ...
94 # ... so that GRO will match the UDP_GRO enabled socket, but packets
160 run_test "no GRO" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400"
164 # when GRO does not take place
165 run_test "no GRO chk cmsg" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400 -S -1"
172 run_test "GRO" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720"
174 run_test "GRO chk cmsg" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720 -S 1472"
176 run_test "GRO with custom segment size" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 14720"
178 …run_test "GRO with custom segment size cmsg" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 1472…
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H A Dveth.sh227 chk_gro_flag "default - gro flag" $SRC off
228 chk_gro_flag " - peer gro flag" $DST off
237 ip netns exec $NS_DST ethtool -K veth$DST gro on
238 chk_gro_flag "with gro on - gro flag" $DST on
239 chk_gro_flag " - peer gro flag" $SRC off
243 ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
250 chk_gro_flag "gro vs xdp while down - gro flag off" $DST off
265 chk_gro_flag "gro vs xdp while down - gro flag on" $DST on
280 ip netns exec $NS_DST ethtool -K veth$DST gro on
281 chk_gro_flag "with gro enabled on link down - gro flag" $DST on
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H A Dudpgro_fwd.sh129 # not enable GRO
249 run_test "No GRO" $BM_NET$DST 10 0
254 ip netns exec $NS_DST ethtool -K veth$DST rx-gro-list on
255 run_test "GRO frag list" $BM_NET$DST 1 0
258 # UDP GRO fwd skips aggregation when find an udp socket with the GRO option
261 # use NAT to circumvent GRO FWD check
265 ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
268 run_test "GRO fwd" $BM_NET$DST_NAT 1 0 $BM_NET$DST
273 ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
274 run_bench "UDP GRO fwd perf" $BM_NET$DST
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H A Ddouble_udp_encap.sh168 # enable GRO heuristic on the veth peer and ensure UDP L4 over tunnel is
194 ip netns exec "$NS_DST" ethtool -K "veth$DST" gro on
326 run_test "GSO without GRO - $ENCAP" $((GSO_SIZE * 4)) \
340 # GRO tests imply/require geneve encap, the only one providing
341 # GRO hints
343 run_test "double tunnel GRO, no hints" $((GSO_SIZE * 4)) 4
350 '"gro-hint":1,"udp-zero-csum6-tx":1,"udp-zero-csum6-rx":1' \
352 run_test "double tunnel GRO" $((GSO_SIZE * 4)) 1
355 create_ns_gso_gro '"gro-hint":1,"udp-csum":1' '"udp-csum":1'
356 run_test "double tunnel GRO - csum complete" $((GSO_SIZE * 4))\
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H A Dbig_tcp.sh138 ip net exec $ROUTER_NS ethtool -K link1 gro $gw_gro
140 ip net exec $SERVER_NS ethtool -K link3 gro $ser_gro
160 echo "CLI GSO | GW GRO | GW GSO | SER GRO" && \
/linux/tools/testing/selftests/drivers/net/
H A Dgro.py5 GRO (Generic Receive Offload) conformance tests.
7 Validates that GRO coalescing works correctly by running the gro
117 """ Setup hardware loopback mode for GRO testing. """
120 cfg.bin_local = cfg.test_dir / "gro"
142 "rx-gro-hw": False,
147 "rx-gro-hw": True,
150 # Some NICs treat HW GRO as a GRO sub-feature so disabling GRO
151 # will also clear HW GRO. Use a hack of installing XDP generic
152 # to skip SW GRO, even when enabled.
154 if not feat["rx-gro-hw"]["active"]:
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H A DMakefile9 gro \
14 gro.py \
/linux/include/net/
H A Dgro.h53 /* portion of the cb set to zero at every gro iteration */
62 /* Used in tunnel GRO receive */
65 /* GRO checksum is valid */
83 /* GRO is done by frag_list pointer chaining. */
213 /* GRO checksum functions. These are logical equivalents of the normal
214 * checksum functions (in skbuff.h) except that they operate on the GRO
257 * during GRO. This saves work if we fallback to normal path. in skb_gro_incr_csum_unnecessary()
503 void __gro_flush(struct gro_node *gro, bool flush_old);
505 static inline void gro_flush(struct gro_node *gro, bool flush_old) in gro_flush() argument
507 if (!gro->bitmask) in gro_flush()
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H A Dbusy_poll.h131 const struct gro_node *gro) in __skb_mark_napi_id() argument
138 skb->napi_id = gro->cached_napi_id; in __skb_mark_napi_id()
145 __skb_mark_napi_id(skb, &napi->gro); in skb_mark_napi_id()
/linux/Documentation/netlink/specs/
H A Dnetdev.yaml278 name: gro-flush-timeout
281 value will also prevent GRO from flushing recent super-frames at
441 name: rx-hw-gro-packets
444 device. Counts only packets coalesced with the HW-GRO netdevice
448 name: rx-hw-gro-bytes
449 doc: See `rx-hw-gro-packets`.
452 name: rx-hw-gro-wire-packets
455 HW-GRO netdevice feature. LRO-coalesced packets are not counted.
458 name: rx-hw-gro-wire-bytes
459 doc: See `rx-hw-gro-wire-packets`.
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/linux/tools/net/ynl/ynltool/
H A Dqstats.c74 jsonw_uint_field(json_wtr, "hw-gro-packets", qs->rx_hw_gro_packets); in print_json_qstats()
76 jsonw_uint_field(json_wtr, "hw-gro-bytes", qs->rx_hw_gro_bytes); in print_json_qstats()
78 jsonw_uint_field(json_wtr, "hw-gro-wire-packets", qs->rx_hw_gro_wire_packets); in print_json_qstats()
80 jsonw_uint_field(json_wtr, "hw-gro-wire-bytes", qs->rx_hw_gro_wire_bytes); in print_json_qstats()
197 /* RX GRO counters */ in print_plain_qstats()
198 print_one(qs->_present.rx_hw_gro_packets, "rx-hw-gro-packets", in print_plain_qstats()
200 print_one(qs->_present.rx_hw_gro_bytes, "rx-hw-gro-bytes", in print_plain_qstats()
202 print_one(qs->_present.rx_hw_gro_wire_packets, "rx-hw-gro-wire-packets", in print_plain_qstats()
204 print_one(qs->_present.rx_hw_gro_wire_bytes, "rx-hw-gro-wire-bytes", in print_plain_qstats()
576 p_err("hw-gro command takes no arguments"); in do_hw_gro()
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/linux/Documentation/networking/device_drivers/ethernet/intel/
H A Dfm10k.rst89 Generic Receive Offload, aka GRO
91 The driver supports the in-kernel software implementation of GRO. GRO has
93 utilization can be significantly reduced when under large Rx load. GRO is an
94 evolution of the previously-used LRO interface. GRO is able to coalesce
/linux/Documentation/networking/
H A Dnetdev-features.rst162 * rx-gro-hw
164 This requests that the NIC enables Hardware GRO (generic receive offload).
165 Hardware GRO is basically the exact reverse of TSO, and is generally
166 stricter than Hardware LRO. A packet stream merged by Hardware GRO must
168 Hardware GRO is dependent on RXCSUM since every packet successfully merged
/linux/tools/testing/selftests/bpf/prog_tests/
H A Dxdp_do_redirect.c187 /* Enable GRO */ in test_xdp_do_redirect()
188 SYS(out, "ethtool -K veth_src gro on"); in test_xdp_do_redirect()
189 SYS(out, "ethtool -K veth_dst gro on"); in test_xdp_do_redirect()
192 if (!ASSERT_OK(err, "veth_src bpf_xdp_query gro on")) in test_xdp_do_redirect()
199 "veth_src query_opts.feature_flags gro on")) in test_xdp_do_redirect()
203 if (!ASSERT_OK(err, "veth_dst bpf_xdp_query gro on")) in test_xdp_do_redirect()
210 "veth_dst query_opts.feature_flags gro on")) in test_xdp_do_redirect()
/linux/net/ipv6/
H A Dexthdrs_offload.c3 * IPV6 GSO/GRO offload support
6 * IPV6 Extension Header GSO/GRO support
H A Dtcpv6_offload.c3 * IPV6 GSO/GRO offload support
6 * TCPv6 GSO/GRO support
11 #include <net/gro.h>
H A Desp6_offload.c3 * IPV6 GSO/GRO offload support
9 * ESP GRO support
19 #include <net/gro.h>
435 MODULE_DESCRIPTION("IPV6 GSO/GRO offload support");
/linux/net/ipv4/
H A Dgre_offload.c3 * IPV4 GSO/GRO offload support
13 #include <net/gro.h>
147 * for GRO, this is problematic for GSO hence can not be enabled in gre_gro_receive()
148 * here because a GRO pkt may end up in the forwarding path, thus in gre_gro_receive()
H A Desp4_offload.c3 * IPV4 GSO/GRO offload support
9 * ESP GRO support
19 #include <net/gro.h>
414 MODULE_DESCRIPTION("IPV4 GSO/GRO offload support");
/linux/Documentation/networking/device_drivers/ethernet/microsoft/
H A Dnetvsc.rst51 Generic Receive Offload, aka GRO
53 The driver supports GRO and it is enabled by default. GRO coalesces
/linux/kernel/bpf/
H A Dcpumap.c38 #include <net/gro.h>
73 struct gro_node gro; member
282 * If the ring is empty, to not hold GRO packets in the stack for too in cpu_map_gro_flush()
287 gro_flush_normal(&rcpu->gro, !empty && HZ >= 1000); in cpu_map_gro_flush()
393 gro_receive_skb(&rcpu->gro, skbs[i]); in cpu_map_kthread_run()
472 gro_init(&rcpu->gro); in __cpu_map_entry_alloc()
506 gro_cleanup(&rcpu->gro); in __cpu_map_entry_alloc()
536 gro_cleanup(&rcpu->gro); in __cpu_map_entry_free()
/linux/tools/testing/selftests/net/netfilter/
H A Dnft_queue.sh623 # Only queue unconfirmed fraglist gro skbs to userspace.
641 …ip netns exec "$nsrouter" ethtool -K "veth0" rx-udp-gro-forwarding on rx-gro-list on generic-recei…
678 ip netns exec "$nsrouter" ethtool -K "veth0" rx-udp-gro-forwarding off
679 ip netns exec "$nsrouter" ethtool -K "veth1" rx-udp-gro-forwarding off
682 # happens when gro did not build at least on aggregate
707 echo "PASS: fraglist gro skb passed with conntrack entry"
709 echo "$errprefix fraglist gro skb passed without conntrack entry"
/linux/include/linux/
H A Dudp.h39 UDP_FLAGS_GRO_ENABLED, /* Request GRO aggregation */
91 /* GRO functions for UDP socket */
114 * Accounting for the tunnel GRO fastpath.
/linux/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/
H A Dcounters.rst191 - Number of received packets processed using hardware-accelerated GRO. The
192 number of hardware GRO offloaded packets received on ring i. Only true GRO
193 packets are counted: only packets that are in an SKB with a GRO count > 1.
197 - Number of received bytes processed using hardware-accelerated GRO. The
198 number of hardware GRO offloaded bytes received on ring i. Only true GRO
199 packets are counted: only packets that are in an SKB with a GRO count > 1.
203 - The number of GRO SKBs constructed from hardware-accelerated GRO. Only SKBs
204 with a GRO count > 1 are counted.
208 - Number of receive packets using hardware-accelerated GRO that have large

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