net-memcg: Introduce mem_cgroup_sk_enabled().

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The socket memcg feature is enabled by a static key and
only works for non-root cgroup.

We check both conditions in many places.

Let's factorise it as a helper function.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Link: https://patch.msgid.link/20250815201712.1745332-8-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Kuniyuki Iwashima 2025-08-15 20:16:15 +00:00 • committed by Jakub Kicinski

parent f7161b234f

commit 43049b0db0

5 changed files with 16 additions and 6 deletions

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2

include/net/proto_memory.h

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10

include/net/sock.h

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2

include/net/tcp.h

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6

net/core/sock.c

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2

net/ipv4/tcp_output.c

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