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| author | Stanislav Fomichev <sdf@google.com> | 2019-07-02 09:13:59 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-07-03 16:52:02 +0200 |
| commit | c2cb5e82a720c05b707701c75dfeb356fe184787 (patch) | |
| tree | 0d43fac701ee98c80dd43eb59fa66a39095aada7 /net | |
| parent | 0357746d1e40a8226f68a42c8d7222a12d7c451f (diff) | |
| download | linux-c2cb5e82a720c05b707701c75dfeb356fe184787.tar.gz linux-c2cb5e82a720c05b707701c75dfeb356fe184787.tar.bz2 linux-c2cb5e82a720c05b707701c75dfeb356fe184787.zip | |
bpf: add icsk_retransmits to bpf_tcp_sock
Add some inet_connection_sock fields to bpf_tcp_sock that might be useful
for debugging congestion control issues.
Cc: Eric Dumazet <edumazet@google.com>
Cc: Priyaranjan Jha <priyarjha@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/filter.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 3da4b6c38b46..089aaea0ccc6 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5544,7 +5544,8 @@ static const struct bpf_func_proto bpf_sock_addr_sk_lookup_udp_proto = { bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info) { - if (off < 0 || off >= offsetofend(struct bpf_tcp_sock, delivered_ce)) + if (off < 0 || off >= offsetofend(struct bpf_tcp_sock, + icsk_retransmits)) return false; if (off % size != 0) @@ -5575,6 +5576,20 @@ u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, offsetof(struct tcp_sock, FIELD)); \ } while (0) +#define BPF_INET_SOCK_GET_COMMON(FIELD) \ + do { \ + BUILD_BUG_ON(FIELD_SIZEOF(struct inet_connection_sock, \ + FIELD) > \ + FIELD_SIZEOF(struct bpf_tcp_sock, FIELD)); \ + *insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF( \ + struct inet_connection_sock, \ + FIELD), \ + si->dst_reg, si->src_reg, \ + offsetof( \ + struct inet_connection_sock, \ + FIELD)); \ + } while (0) + if (insn > insn_buf) return insn - insn_buf; @@ -5661,6 +5676,9 @@ u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, case offsetof(struct bpf_tcp_sock, delivered_ce): BPF_TCP_SOCK_GET_COMMON(delivered_ce); break; + case offsetof(struct bpf_tcp_sock, icsk_retransmits): + BPF_INET_SOCK_GET_COMMON(icsk_retransmits); + break; } return insn - insn_buf; |