diff options
| author | Yixin Shen <bobankhshen@gmail.com> | 2023-03-29 07:35:57 +0000 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2023-03-29 13:10:56 -0700 |
| commit | 562dc56a88983421a6c5a46e0feb891873d118a1 (patch) | |
| tree | d503b09b0383433a217cece89917c29688a1e18f /net/ipv4/bpf_tcp_ca.c | |
| parent | d8d8b008629ffd69f1e204010cb3299bb633877e (diff) | |
bpf: allow a TCP CC to write app_limited
A CC that implements tcp_congestion_ops.cong_control() should be able to
write app_limited. A built-in CC or one from a kernel module is already
able to write to this member of struct tcp_sock.
For a BPF program, write access has not been allowed, yet.
Signed-off-by: Yixin Shen <bobankhshen@gmail.com>
Link: https://lore.kernel.org/r/20230329073558.8136-2-bobankhshen@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'net/ipv4/bpf_tcp_ca.c')
| -rw-r--r-- | net/ipv4/bpf_tcp_ca.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c index e8b27826283e..ea21c96c03aa 100644 --- a/net/ipv4/bpf_tcp_ca.c +++ b/net/ipv4/bpf_tcp_ca.c @@ -113,6 +113,9 @@ static int bpf_tcp_ca_btf_struct_access(struct bpf_verifier_log *log, case offsetof(struct tcp_sock, ecn_flags): end = offsetofend(struct tcp_sock, ecn_flags); break; + case offsetof(struct tcp_sock, app_limited): + end = offsetofend(struct tcp_sock, app_limited); + break; default: bpf_log(log, "no write support to tcp_sock at off %d\n", off); return -EACCES; |