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freebsd-skq/sys/net
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Navdeep Parhar b092fd6c97 if_vxlan(4): add support for hardware assisted checksumming, TSO, and RSS. 
This lets a VXLAN pseudo-interface take advantage of hardware checksumming (tx
and rx), TSO, and RSS if the NIC is capable of performing these operations on
inner VXLAN traffic.

A VXLAN interface inherits the capabilities of its vxlandev interface if one is
specified or of the interface that hosts the vxlanlocal address. If other
interfaces will carry traffic for that VXLAN then they must have the same
hardware capabilities.

On transmit, if_vxlan verifies that the outbound interface has the required
capabilities and then translates the CSUM_ flags to their inner equivalents.
This tells the hardware ifnet that it needs to operate on the inner frame and
not the outer VXLAN headers.

An event is generated when a VXLAN ifnet starts. This allows hardware drivers to
configure their devices to expect VXLAN traffic on the specified incoming port.

On receive, the hardware does RSS and checksum verification on the inner frame.
if_vxlan now does a direct netisr dispatch to take full advantage of RSS. It is
not very clear why it didn't do this already.

Future work:
Rx: it should be possible to avoid the first trip up the protocol stack to get
the frame to if_vxlan just so it can decapsulate and requeue for a second trip
up the stack. The hardware NIC driver could directly call an if_vxlan receive
routine for VXLAN traffic instead.

Rx: LRO. depends on what happens with the previous item. There will have to to
be a mechanism to indicate that it's time for if_vxlan to flush its LRO state.

Reviewed by:	kib@
Relnotes:	Yes
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D25873
2020-09-18 02:37:57 +00:00
..
altq net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
route Fix RADIX_MPATH build broken by r365521. 2020-09-10 07:05:31 +00:00
bpf_buffer.c Add an external mbuf buffer type that holds multiple unmapped pages. 2019-06-29 00:48:33 +00:00
bpf_buffer.h
bpf_filter.c
bpf_jitter.c Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
bpf_jitter.h
bpf_zerocopy.c Change synchonization rules for vm_page reference counting. 2019-09-09 21:32:42 +00:00
bpf_zerocopy.h
bpf.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
bpf.h Extract eventfilter declarations to sys/_eventfilter.h 2019-05-20 00:38:23 +00:00
bpfdesc.h Rework locking in BPF code to remove rwlock from fast path. 2019-05-13 13:45:28 +00:00
bridgestp.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
bridgestp.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
debugnet_inet.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
debugnet_int.h Implement NetGDB(4) 2019-10-17 21:33:01 +00:00
debugnet.c Convert debugnet to the new routing KPI. 2020-04-26 18:42:38 +00:00
debugnet.h Implement NetGDB(4) 2019-10-17 21:33:01 +00:00
dlt.h MFV r353141 (by phillip): 2019-12-21 21:01:03 +00:00
ethernet.h typo: stray spaces. 2020-02-07 15:16:04 +00:00
firewire.h
ieee8023ad_lacp.c if_media: definitions for 40GE LM4 ethernet media type 2020-09-16 14:45:16 +00:00
ieee8023ad_lacp.h make lacp's use_numa hashing aware of send tags 2020-03-09 13:44:51 +00:00
ieee_oui.h Fix a typo in r349969 2019-07-14 03:49:48 +00:00
if_arp.h Improve ARP logging. 2019-03-09 01:12:59 +00:00
if_bridge.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_bridgevar.h libifconfig: Add function to get bridge status 2020-07-01 02:32:41 +00:00
if_clone.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_clone.h epair: Do not abuse params to register the second interface 2020-01-28 22:44:24 +00:00
if_dead.c This adds the third step in getting BBR into the tree. BBR and 2019-08-01 14:17:31 +00:00
if_debug.c
if_disc.c
if_dl.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_edsc.c if_edsc: generate an arbitrary MAC address 2020-03-02 02:45:57 +00:00
if_enc.c Consistently include opt_ipsec.h for consumers of <netipsec/ipsec.h>. 2020-05-29 19:22:40 +00:00
if_enc.h
if_epair.c net: mitigate vnet / epair cleanup races 2020-09-08 14:54:10 +00:00
if_ethersubr.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_fwsubr.c
if_gif.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_gif.h gif_transmit() must always be called in the network epoch. 2020-01-15 06:18:32 +00:00
if_gre.c Add if_reassing method to all tunneling interfaces. 2020-06-03 13:02:31 +00:00
if_gre.h Add GRE-in-UDP encapsulation support as defined in RFC8086. 2019-04-24 09:05:45 +00:00
if_ipsec.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_ipsec.h
if_lagg.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_lagg.h Decode the "LACP Fast Timeout" LAGG option flag 2020-06-11 22:46:08 +00:00
if_llatbl.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_llatbl.h Implement optional table entry limits for if_llatbl. 2020-03-04 17:17:02 +00:00
if_llc.h
if_loop.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_me.c Add if_reassing method to all tunneling interfaces. 2020-06-03 13:02:31 +00:00
if_media.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_media.h if_media: definitions for 40GE LM4 ethernet media type 2020-09-16 14:45:16 +00:00
if_mib.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_mib.h
if_pflog.h
if_pfsync.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_sppp.h
if_spppfr.c
if_spppsubr.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_stf.c Complete conversions from fib<4|6>_lookup_nh_<basic|ext> to fib<4|6>_lookup(). 2020-07-02 21:04:08 +00:00
if_tap.h tap: add support for virtio-net offloads 2019-10-18 21:53:27 +00:00
if_tun.h if_tuntap(4): Add TUNGIFNAME 2019-07-25 22:23:34 +00:00
if_tuntap.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_types.h
if_var.h Switch inet6 default route subscription to the new rib subscription api. 2020-07-12 11:24:23 +00:00
if_vlan_var.h Extract eventfilter declarations to sys/_eventfilter.h 2019-05-20 00:38:23 +00:00
if_vlan.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_vxlan.c if_vxlan(4): add support for hardware assisted checksumming, TSO, and RSS. 2020-09-18 02:37:57 +00:00
if_vxlan.h if_vxlan(4): add support for hardware assisted checksumming, TSO, and RSS. 2020-09-18 02:37:57 +00:00
if.c net: mitigate vnet / epair cleanup races 2020-09-08 14:54:10 +00:00
if.h Add two new ifnet capabilities for hw checksumming and TSO for VXLAN traffic. 2020-09-18 02:10:28 +00:00
ifdi_if.m iflib: Stop interface before (un)registering VLAN 2020-04-27 22:02:44 +00:00
iflib_clone.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
iflib_private.h - Replace unused and only ever written to members of public iflib(9) 2019-06-15 11:07:41 +00:00
iflib.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
iflib.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
ifq.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
mp_ring.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
mp_ring.h
mppc.h
mppcc.c kernel: provide panicky version of __unreachable 2020-05-13 18:07:37 +00:00
mppcd.c
netisr_internal.h
netisr.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
netisr.h
netmap_legacy.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
netmap_user.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
netmap_virt.h netmap: disable passthrough with no hypervisor support 2020-01-13 21:47:23 +00:00
netmap.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
paravirt.h
pfil.c Since now drivers that support pfil run their interrupts in the network 2020-01-23 01:49:22 +00:00
pfil.h Most Ethernet drivers that potentially can run a pfil(9) hook with 2019-03-10 17:20:09 +00:00
pfkeyv2.h Refer to AES-CBC as "aes-cbc" rather than "rijndael-cbc" for IPsec. 2020-06-04 22:58:37 +00:00
pfvar.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
ppp_defs.h
radix_mpath.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
radix_mpath.h Convert rtalloc_mpath_fib() users to the new KPI. 2020-04-28 08:06:56 +00:00
radix.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
radix.h
raw_cb.c Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
raw_cb.h
raw_usrreq.c
rndis.h
route.c Consistently use the same gateway when adding/deleting interface routes. 2020-09-07 10:13:54 +00:00
route.h Make net.fibs growable. 2020-08-21 21:34:52 +00:00
rss_config.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
rss_config.h
rtsock.c rtsock.c: remove extraneous space 2020-09-05 16:13:36 +00:00
sff8436.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sff8472.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
slcompress.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
slcompress.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
toeplitz.c
toeplitz.h
vnet.c Partially revert VNET change and expand VNET structure. 2020-02-17 11:08:50 +00:00
vnet.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00