mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

mptcp: support rstreason for passive reset 

It relies on what reset options in the skb are as rfc8684 says. Reusing
this logic can save us much energy. This patch replaces most of the prior
NOT_SPECIFIED reasons.

Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Jason Xing 2024-04-25 11:13:38 +08:00 committed by Paolo Abeni
parent 120391ef9c
commit 3e140491dd
2 changed files with 44 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
net/mptcp/protocol.h
View File

@ -581,6 +581,33 @@ mptcp_subflow_ctx_reset(struct mptcp_subflow_context *subflow)
WRITE_ONCE(subflow->local_id, -1);
}
/* Convert reset reasons in MPTCP to enum sk_rst_reason type */
static inline enum sk_rst_reason
sk_rst_convert_mptcp_reason(u32 reason)
{
switch (reason) {
case MPTCP_RST_EUNSPEC:
return SK_RST_REASON_MPTCP_RST_EUNSPEC;
case MPTCP_RST_EMPTCP:
return SK_RST_REASON_MPTCP_RST_EMPTCP;
case MPTCP_RST_ERESOURCE:
return SK_RST_REASON_MPTCP_RST_ERESOURCE;
case MPTCP_RST_EPROHIBIT:
return SK_RST_REASON_MPTCP_RST_EPROHIBIT;
case MPTCP_RST_EWQ2BIG:
return SK_RST_REASON_MPTCP_RST_EWQ2BIG;
case MPTCP_RST_EBADPERF:
return SK_RST_REASON_MPTCP_RST_EBADPERF;
case MPTCP_RST_EMIDDLEBOX:
return SK_RST_REASON_MPTCP_RST_EMIDDLEBOX;
default:
/* It should not happen, or else errors may occur
* in MPTCP layer
*/
return SK_RST_REASON_ERROR;
}
}
static inline u64
mptcp_subflow_get_map_offset(const struct mptcp_subflow_context *subflow)
{

22
net/mptcp/subflow.c
View File

@ -309,8 +309,13 @@ static struct dst_entry *subflow_v4_route_req(const struct sock *sk,
return dst;
dst_release(dst);
if (!req->syncookie)
tcp_request_sock_ops.send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED);
if (!req->syncookie) {
struct mptcp_ext *mpext = mptcp_get_ext(skb);
enum sk_rst_reason reason;
reason = sk_rst_convert_mptcp_reason(mpext->reset_reason);
tcp_request_sock_ops.send_reset(sk, skb, reason);
}
return NULL;
}
@ -377,8 +382,13 @@ static struct dst_entry *subflow_v6_route_req(const struct sock *sk,
return dst;
dst_release(dst);
if (!req->syncookie)
tcp6_request_sock_ops.send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED);
if (!req->syncookie) {
struct mptcp_ext *mpext = mptcp_get_ext(skb);
enum sk_rst_reason reason;
reason = sk_rst_convert_mptcp_reason(mpext->reset_reason);
tcp6_request_sock_ops.send_reset(sk, skb, reason);
}
return NULL;
}
#endif
@ -783,6 +793,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
struct mptcp_subflow_request_sock *subflow_req;
struct mptcp_options_received mp_opt;
bool fallback, fallback_is_fatal;
enum sk_rst_reason reason;
struct mptcp_sock *owner;
struct sock *child;
@ -913,7 +924,8 @@ dispose_child:
tcp_rsk(req)->drop_req = true;
inet_csk_prepare_for_destroy_sock(child);
tcp_done(child);
req->rsk_ops->send_reset(sk, skb, SK_RST_REASON_NOT_SPECIFIED);
reason = sk_rst_convert_mptcp_reason(mptcp_get_ext(skb)->reset_reason);
req->rsk_ops->send_reset(sk, skb, reason);
/* The last child reference will be released by the caller */
return child;