tcp: rstreason: fully support in tcp_ack()

Based on the existing skb drop reason, updating the rstreason map can
help us finish the rstreason job in this function.

Signed-off-by: Jason Xing <kernelxing@tencent.com>
Link: https://lore.kernel.org/r/20240510122502.27850-3-kerneljasonxing@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/include/net/rstreason.h b/include/net/rstreason.h
index f87814a60205814aa2db3306c9b5504eb85125b6..69404c14f45d45f3345b26f8f94c25f70a045e2c 100644 (file)
--- a/include/net/rstreason.h
+++ b/include/net/rstreason.h
@@ -10,6 +10,8 @@
        FN(NO_SOCKET)                   \
        FN(TCP_INVALID_ACK_SEQUENCE)    \
        FN(TCP_RFC7323_PAWS)            \
+       FN(TCP_TOO_OLD_ACK)             \
+       FN(TCP_ACK_UNSENT_DATA)         \
        FN(MPTCP_RST_EUNSPEC)           \
        FN(MPTCP_RST_EMPTCP)            \
        FN(MPTCP_RST_ERESOURCE)         \
@@ -50,6 +52,13 @@ enum sk_rst_reason {
         * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED
         */
        SK_RST_REASON_TCP_RFC7323_PAWS,
+       /** @SK_RST_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */
+       SK_RST_REASON_TCP_TOO_OLD_ACK,
+       /**
+        * @SK_RST_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't
+        * sent yet
+        */
+       SK_RST_REASON_TCP_ACK_UNSENT_DATA,
 
        /* Copy from include/uapi/linux/mptcp.h.
         * These reset fields will not be changed since they adhere to
@@ -130,6 +139,10 @@ sk_rst_convert_drop_reason(enum skb_drop_reason reason)
                return SK_RST_REASON_TCP_INVALID_ACK_SEQUENCE;
        case SKB_DROP_REASON_TCP_RFC7323_PAWS:
                return SK_RST_REASON_TCP_RFC7323_PAWS;
+       case SKB_DROP_REASON_TCP_TOO_OLD_ACK:
+               return SK_RST_REASON_TCP_TOO_OLD_ACK;
+       case SKB_DROP_REASON_TCP_ACK_UNSENT_DATA:
+               return SK_RST_REASON_TCP_ACK_UNSENT_DATA;
        default:
                /* If we don't have our own corresponding reason */
                return SK_RST_REASON_NOT_SPECIFIED;