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-rw-r--r--net/rxrpc/input.c71
1 files changed, 46 insertions, 25 deletions
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 9691de00ad..5dfda1ac51 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -9,6 +9,17 @@
#include "ar-internal.h"
+/* Override priority when generating ACKs for received DATA */
+static const u8 rxrpc_ack_priority[RXRPC_ACK__INVALID] = {
+ [RXRPC_ACK_IDLE] = 1,
+ [RXRPC_ACK_DELAY] = 2,
+ [RXRPC_ACK_REQUESTED] = 3,
+ [RXRPC_ACK_DUPLICATE] = 4,
+ [RXRPC_ACK_EXCEEDS_WINDOW] = 5,
+ [RXRPC_ACK_NOSPACE] = 6,
+ [RXRPC_ACK_OUT_OF_SEQUENCE] = 7,
+};
+
static void rxrpc_proto_abort(struct rxrpc_call *call, rxrpc_seq_t seq,
enum rxrpc_abort_reason why)
{
@@ -366,7 +377,7 @@ static void rxrpc_input_queue_data(struct rxrpc_call *call, struct sk_buff *skb,
* Process a DATA packet.
*/
static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
- bool *_notify)
+ bool *_notify, rxrpc_serial_t *_ack_serial, int *_ack_reason)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
struct sk_buff *oos;
@@ -419,8 +430,6 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
/* Send an immediate ACK if we fill in a hole */
else if (!skb_queue_empty(&call->rx_oos_queue))
ack_reason = RXRPC_ACK_DELAY;
- else
- call->ackr_nr_unacked++;
window++;
if (after(window, wtop)) {
@@ -498,12 +507,16 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
}
send_ack:
- if (ack_reason >= 0)
- rxrpc_send_ACK(call, ack_reason, serial,
- rxrpc_propose_ack_input_data);
- else
- rxrpc_propose_delay_ACK(call, serial,
- rxrpc_propose_ack_input_data);
+ if (ack_reason >= 0) {
+ if (rxrpc_ack_priority[ack_reason] > rxrpc_ack_priority[*_ack_reason]) {
+ *_ack_serial = serial;
+ *_ack_reason = ack_reason;
+ } else if (rxrpc_ack_priority[ack_reason] == rxrpc_ack_priority[*_ack_reason] &&
+ ack_reason == RXRPC_ACK_REQUESTED) {
+ *_ack_serial = serial;
+ *_ack_reason = ack_reason;
+ }
+ }
}
/*
@@ -514,9 +527,11 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb
struct rxrpc_jumbo_header jhdr;
struct rxrpc_skb_priv *sp = rxrpc_skb(skb), *jsp;
struct sk_buff *jskb;
+ rxrpc_serial_t ack_serial = 0;
unsigned int offset = sizeof(struct rxrpc_wire_header);
unsigned int len = skb->len - offset;
bool notify = false;
+ int ack_reason = 0;
while (sp->hdr.flags & RXRPC_JUMBO_PACKET) {
if (len < RXRPC_JUMBO_SUBPKTLEN)
@@ -536,7 +551,7 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb
jsp = rxrpc_skb(jskb);
jsp->offset = offset;
jsp->len = RXRPC_JUMBO_DATALEN;
- rxrpc_input_data_one(call, jskb, &notify);
+ rxrpc_input_data_one(call, jskb, &notify, &ack_serial, &ack_reason);
rxrpc_free_skb(jskb, rxrpc_skb_put_jumbo_subpacket);
sp->hdr.flags = jhdr.flags;
@@ -549,7 +564,16 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb
sp->offset = offset;
sp->len = len;
- rxrpc_input_data_one(call, skb, &notify);
+ rxrpc_input_data_one(call, skb, &notify, &ack_serial, &ack_reason);
+
+ if (ack_reason > 0) {
+ rxrpc_send_ACK(call, ack_reason, ack_serial,
+ rxrpc_propose_ack_input_data);
+ } else {
+ call->ackr_nr_unacked++;
+ rxrpc_propose_delay_ACK(call, sp->hdr.serial,
+ rxrpc_propose_ack_input_data);
+ }
if (notify) {
trace_rxrpc_notify_socket(call->debug_id, sp->hdr.serial);
rxrpc_notify_socket(call);
@@ -670,14 +694,14 @@ static void rxrpc_complete_rtt_probe(struct rxrpc_call *call,
/*
* Process the extra information that may be appended to an ACK packet
*/
-static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb,
- struct rxrpc_ackinfo *ackinfo)
+static void rxrpc_input_ack_trailer(struct rxrpc_call *call, struct sk_buff *skb,
+ struct rxrpc_acktrailer *trailer)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
struct rxrpc_peer *peer;
unsigned int mtu;
bool wake = false;
- u32 rwind = ntohl(ackinfo->rwind);
+ u32 rwind = ntohl(trailer->rwind);
if (rwind > RXRPC_TX_MAX_WINDOW)
rwind = RXRPC_TX_MAX_WINDOW;
@@ -688,10 +712,7 @@ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb,
call->tx_winsize = rwind;
}
- if (call->cong_ssthresh > rwind)
- call->cong_ssthresh = rwind;
-
- mtu = min(ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU));
+ mtu = min(ntohl(trailer->maxMTU), ntohl(trailer->ifMTU));
peer = call->peer;
if (mtu < peer->maxdata) {
@@ -837,7 +858,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
struct rxrpc_ack_summary summary = { 0 };
struct rxrpc_ackpacket ack;
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
- struct rxrpc_ackinfo info;
+ struct rxrpc_acktrailer trailer;
rxrpc_serial_t ack_serial, acked_serial;
rxrpc_seq_t first_soft_ack, hard_ack, prev_pkt, since;
int nr_acks, offset, ioffset;
@@ -917,11 +938,11 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
goto send_response;
}
- info.rxMTU = 0;
+ trailer.maxMTU = 0;
ioffset = offset + nr_acks + 3;
- if (skb->len >= ioffset + sizeof(info) &&
- skb_copy_bits(skb, ioffset, &info, sizeof(info)) < 0)
- return rxrpc_proto_abort(call, 0, rxrpc_badmsg_short_ack_info);
+ if (skb->len >= ioffset + sizeof(trailer) &&
+ skb_copy_bits(skb, ioffset, &trailer, sizeof(trailer)) < 0)
+ return rxrpc_proto_abort(call, 0, rxrpc_badmsg_short_ack_trailer);
if (nr_acks > 0)
skb_condense(skb);
@@ -950,8 +971,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
}
/* Parse rwind and mtu sizes if provided. */
- if (info.rxMTU)
- rxrpc_input_ackinfo(call, skb, &info);
+ if (trailer.maxMTU)
+ rxrpc_input_ack_trailer(call, skb, &trailer);
if (first_soft_ack == 0)
return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_zero);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 02:13:09 +0000