mptcp: rename fourth ack field

The name is misleading, it actually tracks the 'fully established'
status.

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 63c8ee4..55f3ce7 100644 (file)
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -259,11 +259,11 @@ static bool mptcp_established_options_mp(struct sock *sk, struct sk_buff *skb,
        struct mptcp_ext *mpext;
        unsigned int data_len;
 
-       pr_debug("subflow=%p fourth_ack=%d seq=%x:%x remaining=%d", subflow,
-                subflow->fourth_ack, subflow->snd_isn,
+       pr_debug("subflow=%p fully established=%d seq=%x:%x remaining=%d",
+                subflow, subflow->fully_established, subflow->snd_isn,
                 skb ? TCP_SKB_CB(skb)->seq : 0, remaining);
 
-       if (subflow->mp_capable && !subflow->fourth_ack && skb &&
+       if (subflow->mp_capable && !subflow->fully_established && skb &&
            subflow->snd_isn == TCP_SKB_CB(skb)->seq) {
                /* When skb is not available, we better over-estimate the
                 * emitted options len. A full DSS option is longer than
@@ -429,19 +429,19 @@ bool mptcp_synack_options(const struct request_sock *req, unsigned int *size,
        return false;
 }
 
-static bool check_fourth_ack(struct mptcp_subflow_context *subflow,
-                            struct sk_buff *skb,
-                            struct mptcp_options_received *mp_opt)
+static bool check_fully_established(struct mptcp_subflow_context *subflow,
+                                   struct sk_buff *skb,
+                                   struct mptcp_options_received *mp_opt)
 {
        /* here we can process OoO, in-window pkts, only in-sequence 4th ack
         * are relevant
         */
-       if (likely(subflow->fourth_ack ||
+       if (likely(subflow->fully_established ||
                   TCP_SKB_CB(skb)->seq != subflow->ssn_offset + 1))
                return true;
 
        if (mp_opt->use_ack)
-               subflow->fourth_ack = 1;
+               subflow->fully_established = 1;
 
        if (subflow->can_ack)
                return true;
@@ -467,7 +467,7 @@ void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb,
        struct mptcp_ext *mpext;
 
        mp_opt = &opt_rx->mptcp;
-       if (!check_fourth_ack(subflow, skb, mp_opt))
+       if (!check_fully_established(subflow, skb, mp_opt))
                return;
 
        if (!mp_opt->dss)

diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 9baf6fc..eb3f652 100644 (file)
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -119,7 +119,7 @@ struct mptcp_subflow_context {
        u32     map_data_len;
        u32     request_mptcp : 1,  /* send MP_CAPABLE */
                mp_capable : 1,     /* remote is MPTCP capable */
-               fourth_ack : 1,     /* send initial DSS */
+               fully_established : 1,      /* path validated */
                conn_finished : 1,
                map_valid : 1,
                mpc_map : 1,

diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 052d72a..e1faa88 100644 (file)
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -802,7 +802,7 @@ static void subflow_ulp_clone(const struct request_sock *req,
        new_ctx->tcp_sock = newsk;
 
        new_ctx->mp_capable = 1;
-       new_ctx->fourth_ack = subflow_req->remote_key_valid;
+       new_ctx->fully_established = subflow_req->remote_key_valid;
        new_ctx->can_ack = subflow_req->remote_key_valid;
        new_ctx->remote_key = subflow_req->remote_key;
        new_ctx->local_key = subflow_req->local_key;