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bpf: add dsack_dups/delivered{, _ce} to bpf_tcp_sock

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Add more 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>
This commit is contained in:
Stanislav Fomichev
2019-07-02 09:13:58 -07:00
committed by Daniel Borkmann
parent 2377b81de5
commit 0357746d1e
2 changed files with 15 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/uapi/linux/bpf.h
View File

@@ -3073,6 +3073,11 @@ struct bpf_tcp_sock {
* sum(delta(snd_una)), or how many bytes * sum(delta(snd_una)), or how many bytes
* were acked. * were acked.
*/ */
__u32 dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups
* total number of DSACK blocks received
*/
__u32 delivered; /* Total data packets delivered incl. rexmits */
__u32 delivered_ce; /* Like the above but only ECE marked packets */
}; };
struct bpf_sock_tuple { struct bpf_sock_tuple {

11
net/core/filter.c
View File

@@ -5544,7 +5544,7 @@ 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, bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
struct bpf_insn_access_aux *info) struct bpf_insn_access_aux *info)
{ {
if (off < 0 || off >= offsetofend(struct bpf_tcp_sock, bytes_acked)) if (off < 0 || off >= offsetofend(struct bpf_tcp_sock, delivered_ce))
return false; return false;
if (off % size != 0) if (off % size != 0)
@@ -5652,6 +5652,15 @@ u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
case offsetof(struct bpf_tcp_sock, bytes_acked): case offsetof(struct bpf_tcp_sock, bytes_acked):
BPF_TCP_SOCK_GET_COMMON(bytes_acked); BPF_TCP_SOCK_GET_COMMON(bytes_acked);
break; break;
case offsetof(struct bpf_tcp_sock, dsack_dups):
BPF_TCP_SOCK_GET_COMMON(dsack_dups);
break;
case offsetof(struct bpf_tcp_sock, delivered):
BPF_TCP_SOCK_GET_COMMON(delivered);
break;
case offsetof(struct bpf_tcp_sock, delivered_ce):
BPF_TCP_SOCK_GET_COMMON(delivered_ce);
break;
} }
return insn - insn_buf; return insn - insn_buf;