ipv4: Namespacify IPv4 address GC.

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Each IPv4 address could have a lifetime, which is useful for DHCP,
and GC is periodically executed as check_lifetime_work.

check_lifetime() does the actual GC under RTNL.

  1. Acquire RTNL
  2. Iterate inet_addr_lst
  3. Remove IPv4 address if expired
  4. Release RTNL

Namespacifying the GC is required for per-netns RTNL, but using the
per-netns hash table will shorten the time on the hash bucket iteration
under RTNL.

Let's add per-netns GC work and use the per-netns hash table.

Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20241008172906.1326-4-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Kuniyuki Iwashima 2024-10-08 10:29:05 -07:00 • committed by Jakub Kicinski

parent 49e6131942

commit 1675f38521

2 changed files with 19 additions and 14 deletions

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1

include/net/netns/ipv4.h

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32

net/ipv4/devinet.c

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