d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
8732245d29
freebsd-nq/sys/net
History
Andrew Gallatin 8732245d29 LACP: When suppressing distributing, return ENOBUFS 
When links come and go, lacp goes into a "suppress distributing" mode
where it drops traffic for 3 seconds. When in this mode, lagg/lacp
historiclally drops traffic with ENETDOWN. That return value causes TCP
to close any connection where it gets that value back from the lower
parts of the stack.  This means that any TCP connection with active
traffic during a 3-second windown when an LACP link comes or goes
would get closed.

TCP treats return values of ENOBUFS as transient errors, and re-schedules
transmission later. So rather than returning ENETDOWN, lets
return ENOBUFS instead.  This allows TCP connections to be preserved.

I've tested this by repeatedly bouncing links on a Netlfix CDN server
under a moderate (20Gb/s) load and overved ENOBUFS reported back to
the TCP stack (as reported by a RACK TCP sysctl).

Reviewed by:	jhb, jtl, rrs
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D27188
2020-11-18 14:55:49 +00:00
..
altq net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
route Switch net.add_addr_allfibs default to 0. 2020-11-08 18:27:49 +00:00
bpf_buffer.c
bpf_buffer.h
bpf_filter.c
bpf_jitter.c
bpf_jitter.h
bpf_zerocopy.c
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
bpfdesc.h
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
debugnet.c
debugnet.h
dlt.h
ethernet.h net: add ETHER_IS_IPV6_MULTICAST 2020-10-30 13:32:58 +00:00
firewire.h
ieee8023ad_lacp.c LACP: When suppressing distributing, return ENOBUFS 2020-11-18 14:55:49 +00:00
ieee8023ad_lacp.h LACP: When suppressing distributing, return ENOBUFS 2020-11-18 14:55:49 +00:00
ieee_oui.h
if_arp.h
if_bridge.c bridge: call member interface ioctl() without NET_EPOCH 2020-10-06 19:19:56 +00:00
if_bridgevar.h
if_clone.c Add support for stacked VLANs (IEEE 802.1ad, AKA Q-in-Q). 2020-10-21 21:28:20 +00:00
if_clone.h
if_dead.c
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_enc.c
if_enc.h
if_epair.c net: mitigate vnet / epair cleanup races 2020-09-08 14:54:10 +00:00
if_ethersubr.c Add support for IP over infiniband, IPoIB, to lagg(4). Currently only 2020-10-22 09:47:12 +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
if_gre.c
if_gre.h
if_infiniband.c More style fixes (partial revert of r366994). 2020-10-24 13:07:50 +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 LACP: When suppressing distributing, return ENOBUFS 2020-11-18 14:55:49 +00:00
if_lagg.h Add support for IP over infiniband, IPoIB, to lagg(4). Currently only 2020-10-22 09:47:12 +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
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
if_media.c if_media.c SIOCGMEDIAX handler: improve loop 2020-11-03 14:33:04 +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
if_tap.h
if_tun.h
if_tuntap.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_types.h Add support for IP over infiniband, IPoIB, to lagg(4). Currently only 2020-10-22 09:47:12 +00:00
if_var.h Support hardware rate limiting (pacing) with TLS offload. 2020-10-29 00:23:16 +00:00
if_vlan_var.h Add support for stacked VLANs (IEEE 802.1ad, AKA Q-in-Q). 2020-10-21 21:28:20 +00:00
if_vlan.c Add m_snd_tag_alloc() as a wrapper around if_snd_tag_alloc(). 2020-10-29 23:28:39 +00:00
if_vxlan.c if_vxlan(4): csum_flags_to_inner_flags takes the tunnel protocol as a parameter. 2020-10-22 17:05:55 +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 Move all ifaddr route creation business logic to net/route/route_ifaddr.c 2020-11-08 11:12:00 +00:00
if.h Support hardware rate limiting (pacing) with TLS offload. 2020-10-29 00:23:16 +00:00
ifdi_if.m
iflib_clone.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
iflib_private.h
iflib.c iflib: Free full mbuf chains when draining transmit queues 2020-11-11 18:00:06 +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
infiniband.h Factor out generic IP over infiniband, IPoIB, definitions and code 2020-10-22 09:09:53 +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
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 netmap: fix constness warnings generated by "-Wcast-qual" 2020-10-03 09:33:29 +00:00
netmap_virt.h
netmap.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
paravirt.h
pfil.c
pfil.h
pfkeyv2.h Add SADB_SAFLAGS_ESN flag 2020-10-16 11:22:29 +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
radix.c Fix definition of rn_addmask() 2020-11-08 19:02:22 +00:00
radix.h
raw_cb.c
raw_cb.h
raw_usrreq.c
rndis.h
route.c Move all ifaddr route creation business logic to net/route/route_ifaddr.c 2020-11-08 11:12:00 +00:00
route.h Implement flowid calculation for outbound connections to balance 2020-10-18 17:15:47 +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 Fix route flags update during RTM_CHANGE. 2020-10-04 13:24:58 +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
vnet.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00