From: Lawrence Brakmo <brakmo@fb.com>
To: netdev <netdev@vger.kernel.org>
Cc: Kernel Team <kernel-team@fb.com>, Blake Matheny <bmatheny@fb.com>,
Alexei Starovoitov <ast@fb.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Eric Dumazet <eric.dumazet@gmail.com>,
Neal Cardwell <ncardwell@google.com>,
Yuchung Cheng <ycheng@google.com>
Subject: [PATCH bpf-next v5 01/11] bpf: Make SOCK_OPS_GET_TCP size independent
Date: Tue, 9 Jan 2018 13:06:54 -0800 [thread overview]
Message-ID: <20180109210704.893375-2-brakmo@fb.com> (raw)
In-Reply-To: <20180109210704.893375-1-brakmo@fb.com>
Make SOCK_OPS_GET_TCP helper macro size independent (before only worked
with 4-byte fields.
Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
---
net/core/filter.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index acdb94c..549c70c 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4468,9 +4468,10 @@ static u32 sock_ops_convert_ctx_access(enum bpf_access_type type,
break;
/* Helper macro for adding read access to tcp_sock fields. */
-#define SOCK_OPS_GET_TCP32(FIELD_NAME) \
+#define SOCK_OPS_GET_TCP(FIELD_NAME) \
do { \
- BUILD_BUG_ON(FIELD_SIZEOF(struct tcp_sock, FIELD_NAME) != 4); \
+ BUILD_BUG_ON(FIELD_SIZEOF(struct tcp_sock, FIELD_NAME) > \
+ FIELD_SIZEOF(struct bpf_sock_ops, FIELD_NAME)); \
*insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF( \
struct bpf_sock_ops_kern, \
is_fullsock), \
@@ -4482,16 +4483,18 @@ static u32 sock_ops_convert_ctx_access(enum bpf_access_type type,
struct bpf_sock_ops_kern, sk),\
si->dst_reg, si->src_reg, \
offsetof(struct bpf_sock_ops_kern, sk));\
- *insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->dst_reg, \
+ *insn++ = BPF_LDX_MEM(FIELD_SIZEOF(struct tcp_sock, \
+ FIELD_NAME), si->dst_reg, \
+ si->dst_reg, \
offsetof(struct tcp_sock, FIELD_NAME)); \
} while (0)
case offsetof(struct bpf_sock_ops, snd_cwnd):
- SOCK_OPS_GET_TCP32(snd_cwnd);
+ SOCK_OPS_GET_TCP(snd_cwnd);
break;
case offsetof(struct bpf_sock_ops, srtt_us):
- SOCK_OPS_GET_TCP32(srtt_us);
+ SOCK_OPS_GET_TCP(srtt_us);
break;
}
return insn - insn_buf;
--
2.9.5
next prev parent reply other threads:[~2018-01-09 21:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 21:06 [PATCH bpf-next v5 00/11] bpf: More sock_ops callbacks Lawrence Brakmo
2018-01-09 21:06 ` Lawrence Brakmo [this message]
2018-01-09 21:06 ` [PATCH bpf-next v5 02/11] bpf: Make SOCK_OPS_GET_TCP struct independent Lawrence Brakmo
2018-01-09 21:06 ` [PATCH bpf-next v5 03/11] bpf: Add write access to tcp_sock and sock fields Lawrence Brakmo
2018-01-09 23:21 ` Eric Dumazet
2018-01-09 23:41 ` Lawrence Brakmo
2018-01-09 21:06 ` [PATCH bpf-next v5 04/11] bpf: Support passing args to sock_ops bpf function Lawrence Brakmo
2018-01-09 21:06 ` [PATCH bpf-next v5 05/11] bpf: Adds field bpf_sock_ops_flags to tcp_sock Lawrence Brakmo
2018-01-09 23:30 ` Eric Dumazet
2018-01-10 0:31 ` Lawrence Brakmo
2018-01-09 21:06 ` [PATCH bpf-next v5 06/11] bpf: Add sock_ops RTO callback Lawrence Brakmo
2018-01-09 21:07 ` [PATCH bpf-next v5 07/11] bpf: Add support for reading sk_state and more Lawrence Brakmo
2018-01-09 21:07 ` [PATCH bpf-next v5 08/11] bpf: Add sock_ops R/W access to tclass & sk_txhash Lawrence Brakmo
2018-01-09 21:07 ` [PATCH bpf-next v5 09/11] bpf: Add BPF_SOCK_OPS_RETRANS_CB Lawrence Brakmo
2018-01-09 21:07 ` [PATCH bpf-next v5 10/11] bpf: Add BPF_SOCK_OPS_STATE_CB Lawrence Brakmo
2018-01-09 21:07 ` [PATCH bpf-next v5 11/11] bpf: add selftest for tcpbpf Lawrence Brakmo
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