Merge branch 'bpf-allow-opt-out-from-sk-sk_prot-memory_allocated'
Kuniyuki Iwashima says:
====================
bpf: Allow opt-out from sk->sk_prot->memory_allocated.
This series allows opting out of the global per-protocol memory
accounting if socket is configured as such by sysctl or BPF prog.
This series is the successor of the series below [0], but the changes
now fall in net and bpf subsystems only.
I discussed with Roman Gushchin offlist, and he suggested not mixing
two independent subsystems and it would be cleaner not to depend on
memcg.
So, sk->sk_memcg and memcg code are no longer touched, and instead we
use another hole near sk->sk_prot to store a flag for the pure net
opt-out feature.
Overview of the series:
patch 1 is misc cleanup
patch 2 allows opt-out from sk->sk_prot->memory_allocated
patch 3 introduces net.core.bypass_prot_mem
patch 4 & 5 supports flagging sk->sk_bypass_prot_mem via bpf_setsockopt()
patch 6 is selftest
Thank you very much for all your help, Shakeel, Roman, Martin, and Eric!
[0]: https://lore.kernel.org/bpf/20250920000751.2091731-1-kuniyu@google.com/
Changes:
v2:
* Patch 2:
* Fill kdoc for skc_bypass_prot_mem
* Patch 6
* Fix server fd leak in tcp_create_sockets()
* Avoid close(0) in check_bypass()
v1: https://lore.kernel.org/bpf/20251007001120.2661442-1-kuniyu@google.com/
====================
Link: https://patch.msgid.link/20251014235604.3057003-1-kuniyu@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
