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| author | Kui-Feng Lee <kuifeng@meta.com> | 2023-03-22 20:24:02 -0700 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2023-03-22 22:53:02 -0700 |
| commit | aef56f2e918bf8fc8de25f0b36e8c2aba44116ec (patch) | |
| tree | 38d252f9d4fa8ef28ccf18e642bb3741d658fb92 /net | |
| parent | 8d1608d70927747da9c1a8770edf7b6ee68f8ebc (diff) | |
| download | linux-stable-aef56f2e918bf8fc8de25f0b36e8c2aba44116ec.tar.gz linux-stable-aef56f2e918bf8fc8de25f0b36e8c2aba44116ec.tar.bz2 linux-stable-aef56f2e918bf8fc8de25f0b36e8c2aba44116ec.zip | |
bpf: Update the struct_ops of a bpf_link.
By improving the BPF_LINK_UPDATE command of bpf(), it should allow you
to conveniently switch between different struct_ops on a single
bpf_link. This would enable smoother transitions from one struct_ops
to another.
The struct_ops maps passing along with BPF_LINK_UPDATE should have the
BPF_F_LINK flag.
Signed-off-by: Kui-Feng Lee <kuifeng@meta.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230323032405.3735486-6-kuifeng@meta.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/bpf_tcp_ca.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c index bbbd5eb94db2..e8b27826283e 100644 --- a/net/ipv4/bpf_tcp_ca.c +++ b/net/ipv4/bpf_tcp_ca.c @@ -264,6 +264,11 @@ static void bpf_tcp_ca_unreg(void *kdata) tcp_unregister_congestion_control(kdata); } +static int bpf_tcp_ca_update(void *kdata, void *old_kdata) +{ + return tcp_update_congestion_control(kdata, old_kdata); +} + static int bpf_tcp_ca_validate(void *kdata) { return tcp_validate_congestion_control(kdata); @@ -273,6 +278,7 @@ struct bpf_struct_ops bpf_tcp_congestion_ops = { .verifier_ops = &bpf_tcp_ca_verifier_ops, .reg = bpf_tcp_ca_reg, .unreg = bpf_tcp_ca_unreg, + .update = bpf_tcp_ca_update, .check_member = bpf_tcp_ca_check_member, .init_member = bpf_tcp_ca_init_member, .init = bpf_tcp_ca_init, |