mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-30 22:26:55 +00:00
120391ef9c
Reuse the dropreason logic to show the exact reason of tcp reset, so we can finally display the corresponding item in enum sk_reset_reason instead of reinventing new reset reasons. This patch replaces all the prior NOT_SPECIFIED reasons. Signed-off-by: Jason Xing <kernelxing@tencent.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
121 lines
4 KiB
C
121 lines
4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
#ifndef _LINUX_RSTREASON_H
|
|
#define _LINUX_RSTREASON_H
|
|
#include <net/dropreason-core.h>
|
|
#include <uapi/linux/mptcp.h>
|
|
|
|
#define DEFINE_RST_REASON(FN, FNe) \
|
|
FN(NOT_SPECIFIED) \
|
|
FN(NO_SOCKET) \
|
|
FN(MPTCP_RST_EUNSPEC) \
|
|
FN(MPTCP_RST_EMPTCP) \
|
|
FN(MPTCP_RST_ERESOURCE) \
|
|
FN(MPTCP_RST_EPROHIBIT) \
|
|
FN(MPTCP_RST_EWQ2BIG) \
|
|
FN(MPTCP_RST_EBADPERF) \
|
|
FN(MPTCP_RST_EMIDDLEBOX) \
|
|
FN(ERROR) \
|
|
FNe(MAX)
|
|
|
|
/**
|
|
* enum sk_rst_reason - the reasons of socket reset
|
|
*
|
|
* The reasons of sk reset, which are used in DCCP/TCP/MPTCP protocols.
|
|
*
|
|
* There are three parts in order:
|
|
* 1) skb drop reasons: relying on drop reasons for such as passive reset
|
|
* 2) independent reset reasons: such as active reset reasons
|
|
* 3) reset reasons in MPTCP: only for MPTCP use
|
|
*/
|
|
enum sk_rst_reason {
|
|
/* Refer to include/net/dropreason-core.h
|
|
* Rely on skb drop reasons because it indicates exactly why RST
|
|
* could happen.
|
|
*/
|
|
/** @SK_RST_REASON_NOT_SPECIFIED: reset reason is not specified */
|
|
SK_RST_REASON_NOT_SPECIFIED,
|
|
/** @SK_RST_REASON_NO_SOCKET: no valid socket that can be used */
|
|
SK_RST_REASON_NO_SOCKET,
|
|
|
|
/* Copy from include/uapi/linux/mptcp.h.
|
|
* These reset fields will not be changed since they adhere to
|
|
* RFC 8684. So do not touch them. I'm going to list each definition
|
|
* of them respectively.
|
|
*/
|
|
/**
|
|
* @SK_RST_REASON_MPTCP_RST_EUNSPEC: Unspecified error.
|
|
* This is the default error; it implies that the subflow is no
|
|
* longer available. The presence of this option shows that the
|
|
* RST was generated by an MPTCP-aware device.
|
|
*/
|
|
SK_RST_REASON_MPTCP_RST_EUNSPEC,
|
|
/**
|
|
* @SK_RST_REASON_MPTCP_RST_EMPTCP: MPTCP-specific error.
|
|
* An error has been detected in the processing of MPTCP options.
|
|
* This is the usual reason code to return in the cases where a RST
|
|
* is being sent to close a subflow because of an invalid response.
|
|
*/
|
|
SK_RST_REASON_MPTCP_RST_EMPTCP,
|
|
/**
|
|
* @SK_RST_REASON_MPTCP_RST_ERESOURCE: Lack of resources.
|
|
* This code indicates that the sending host does not have enough
|
|
* resources to support the terminated subflow.
|
|
*/
|
|
SK_RST_REASON_MPTCP_RST_ERESOURCE,
|
|
/**
|
|
* @SK_RST_REASON_MPTCP_RST_EPROHIBIT: Administratively prohibited.
|
|
* This code indicates that the requested subflow is prohibited by
|
|
* the policies of the sending host.
|
|
*/
|
|
SK_RST_REASON_MPTCP_RST_EPROHIBIT,
|
|
/**
|
|
* @SK_RST_REASON_MPTCP_RST_EWQ2BIG: Too much outstanding data.
|
|
* This code indicates that there is an excessive amount of data
|
|
* that needs to be transmitted over the terminated subflow while
|
|
* having already been acknowledged over one or more other subflows.
|
|
* This may occur if a path has been unavailable for a short period
|
|
* and it is more efficient to reset and start again than it is to
|
|
* retransmit the queued data.
|
|
*/
|
|
SK_RST_REASON_MPTCP_RST_EWQ2BIG,
|
|
/**
|
|
* @SK_RST_REASON_MPTCP_RST_EBADPERF: Unacceptable performance.
|
|
* This code indicates that the performance of this subflow was
|
|
* too low compared to the other subflows of this Multipath TCP
|
|
* connection.
|
|
*/
|
|
SK_RST_REASON_MPTCP_RST_EBADPERF,
|
|
/**
|
|
* @SK_RST_REASON_MPTCP_RST_EMIDDLEBOX: Middlebox interference.
|
|
* Middlebox interference has been detected over this subflow,
|
|
* making MPTCP signaling invalid. For example, this may be sent
|
|
* if the checksum does not validate.
|
|
*/
|
|
SK_RST_REASON_MPTCP_RST_EMIDDLEBOX,
|
|
|
|
/** @SK_RST_REASON_ERROR: unexpected error happens */
|
|
SK_RST_REASON_ERROR,
|
|
|
|
/**
|
|
* @SK_RST_REASON_MAX: Maximum of socket reset reasons.
|
|
* It shouldn't be used as a real 'reason'.
|
|
*/
|
|
SK_RST_REASON_MAX,
|
|
};
|
|
|
|
/* Convert skb drop reasons to enum sk_rst_reason type */
|
|
static inline enum sk_rst_reason
|
|
sk_rst_convert_drop_reason(enum skb_drop_reason reason)
|
|
{
|
|
switch (reason) {
|
|
case SKB_DROP_REASON_NOT_SPECIFIED:
|
|
return SK_RST_REASON_NOT_SPECIFIED;
|
|
case SKB_DROP_REASON_NO_SOCKET:
|
|
return SK_RST_REASON_NO_SOCKET;
|
|
default:
|
|
/* If we don't have our own corresponding reason */
|
|
return SK_RST_REASON_NOT_SPECIFIED;
|
|
}
|
|
}
|
|
#endif
|