Martin KaFai Lau cae3873c5b net: inet: Retire port only listening_hash ... The listen sk is currently stored in two hash tables, listening_hash (hashed by port) and lhash2 (hashed by port and address). After commit 0ee58dad5b ("net: tcp6: prefer listeners bound to an address") and commit d9fbc7f643 ("net: tcp: prefer listeners bound to an address"), the TCP-SYN lookup fast path does not use listening_hash. The commit 05c0b35709 ("tcp: seq_file: Replace listening_hash with lhash2") also moved the seq_file (/proc/net/tcp) iteration usage from listening_hash to lhash2. There are still a few listening_hash usages left. One of them is inet_reuseport_add_sock() which uses the listening_hash to search a listen sk during the listen() system call. This turns out to be very slow on use cases that listen on many different VIPs at a popular port (e.g. 443). [ On top of the slowness in adding to the tail in the IPv6 case ]. The latter patch has a selftest to demonstrate this case. This patch takes this chance to move all remaining listening_hash usages to lhash2 and then retire listening_hash. Since most changes need to be done together, it is hard to cut the listening_hash to lhash2 switch into small patches. The changes in this patch is highlighted here for the review purpose. 1. Because of the listening_hash removal, lhash2 can use the sk->sk_nulls_node instead of the icsk->icsk_listen_portaddr_node. This will also keep the sk_unhashed() check to work as is after stop adding sk to listening_hash. The union is removed from inet_listen_hashbucket because only nulls_head is needed. 2. icsk->icsk_listen_portaddr_node and its helpers are removed. 3. The current lhash2 users needs to iterate with sk_nulls_node instead of icsk_listen_portaddr_node. One case is in the inet[6]_lhash2_lookup(). Another case is the seq_file iterator in tcp_ipv4.c. One thing to note is sk_nulls_next() is needed because the old inet_lhash2_for_each_icsk_continue() does a "next" first before iterating. 4. Move the remaining listening_hash usage to lhash2 inet_reuseport_add_sock() which this series is trying to improve. inet_diag.c and mptcp_diag.c are the final two remaining use cases and is moved to lhash2 now also. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2022-05-12 16:52:18 -07:00
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acpi	ACPI: bus: Eliminate acpi_bus_get_device()	2022-04-05 19:49:26 +02:00
asm-generic	bug: Have __warn() prototype defined unconditionally	2022-04-26 10:59:57 +02:00
clocksource	…
crypto	…
drm	…
dt-bindings	dt-bindings: clk: mpfs: add defines for two new clocks	2022-04-22 18:40:15 -07:00
keys	…
kunit	…
kvm	…
linux	skbuff: replace a BUG_ON() with the new DEBUG_NET_WARN_ON_ONCE()	2022-05-12 16:20:52 -07:00
math-emu	…
media	…
memory	memory: renesas-rpc-if: Fix HF/OSPI data transfer in Manual Mode	2022-04-21 17:00:24 +02:00
misc	…
net	net: inet: Retire port only listening_hash	2022-05-12 16:52:18 -07:00
pcmcia	…
ras	mm/memory-failure.c: fix race with changing page compound again	2022-03-22 15:57:07 -07:00
rdma	RDMA/core: Delete IPsec flow action logic from the core	2022-04-09 08:25:06 +03:00
scsi	scsi: iscsi: Fix NOP handling during conn recovery	2022-04-11 22:09:35 -04:00
soc	net: mscc: ocelot: move ocelot_port_private :: chip_port to ocelot_port :: index	2022-05-12 16:39:18 -07:00
sound	ASoC: Fixes for v5.18	2022-04-19 17:26:01 +02:00
target	…
trace	mptcp: dump infinite_map field in mptcp_dump_mpext	2022-04-23 11:51:05 +01:00
uapi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-05-12 16:15:30 -07:00
vdso	…
video	…
xen	…