diff options
| author | Florian Westphal <fw@strlen.de> | 2020-07-30 21:25:52 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-31 16:55:32 -0700 |
| commit | 78d8b7bc4b32e2d32ac19d3b217166224c4342d0 (patch) | |
| tree | 822a0aa546f7b1745dde696b8262a19d3e7322ed /net | |
| parent | 535fb8152f313dd5d30ef84ce55b01ad9cbae3cf (diff) | |
| download | linux-78d8b7bc4b32e2d32ac19d3b217166224c4342d0.tar.bz2 | |
mptcp: subflow: split subflow_init_req
When syncookie support is added, we will need to add a variant of
subflow_init_req() helper. It will do almost same thing except
that it will not compute/add a token to the mptcp token tree.
To avoid excess copy&paste, this commit splits away part of the
code into a new helper, __subflow_init_req, that can then be re-used
from the 'no insert' function added in a followup change.
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mptcp/subflow.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 9feb87880d1c..091e305a81c8 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -91,17 +91,9 @@ static struct mptcp_sock *subflow_token_join_request(struct request_sock *req, return msk; } -static void subflow_init_req(struct request_sock *req, - const struct sock *sk_listener, - struct sk_buff *skb) +static int __subflow_init_req(struct request_sock *req, const struct sock *sk_listener) { - struct mptcp_subflow_context *listener = mptcp_subflow_ctx(sk_listener); struct mptcp_subflow_request_sock *subflow_req = mptcp_subflow_rsk(req); - struct mptcp_options_received mp_opt; - - pr_debug("subflow_req=%p, listener=%p", subflow_req, listener); - - mptcp_get_options(skb, &mp_opt); subflow_req->mp_capable = 0; subflow_req->mp_join = 0; @@ -113,9 +105,29 @@ static void subflow_init_req(struct request_sock *req, * TCP option space. */ if (rcu_access_pointer(tcp_sk(sk_listener)->md5sig_info)) - return; + return -EINVAL; #endif + return 0; +} + +static void subflow_init_req(struct request_sock *req, + const struct sock *sk_listener, + struct sk_buff *skb) +{ + struct mptcp_subflow_context *listener = mptcp_subflow_ctx(sk_listener); + struct mptcp_subflow_request_sock *subflow_req = mptcp_subflow_rsk(req); + struct mptcp_options_received mp_opt; + int ret; + + pr_debug("subflow_req=%p, listener=%p", subflow_req, listener); + + ret = __subflow_init_req(req, sk_listener); + if (ret) + return; + + mptcp_get_options(skb, &mp_opt); + if (mp_opt.mp_capable) { SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEPASSIVE); |