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-rw-r--r--net/rxrpc/ar-internal.h7
-rw-r--r--net/rxrpc/call_event.c18
-rw-r--r--net/rxrpc/input.c37
-rw-r--r--net/rxrpc/proc.c2
-rw-r--r--net/rxrpc/skbuff.c10
5 files changed, 43 insertions, 31 deletions
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 66c917077880..c779b50135f6 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -322,7 +322,7 @@ struct rxrpc_connection {
int error; /* local error incurred */
int debug_id; /* debug ID for printks */
atomic_t serial; /* packet serial number counter */
- atomic_t hi_serial; /* highest serial number received */
+ unsigned int hi_serial; /* highest serial number received */
atomic_t avail_chans; /* number of channels available */
u8 size_align; /* data size alignment (for security) */
u8 header_size; /* rxrpc + security header size */
@@ -457,6 +457,7 @@ struct rxrpc_call {
rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
u8 ackr_reason; /* reason to ACK */
+ u16 ackr_skew; /* skew on packet being ACK'd */
rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
atomic_t ackr_not_idle; /* number of packets in Rx queue */
@@ -499,8 +500,8 @@ int rxrpc_reject_call(struct rxrpc_sock *);
/*
* call_event.c
*/
-void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool);
-void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool);
+void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
+void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
void rxrpc_process_call(struct work_struct *);
/*
diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index 3d1267cea9ea..3d1961d82325 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -25,7 +25,7 @@
* propose an ACK be sent
*/
void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
- u32 serial, bool immediate)
+ u16 skew, u32 serial, bool immediate)
{
unsigned long expiry;
s8 prior = rxrpc_ack_priority[ack_reason];
@@ -44,8 +44,10 @@ void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
/* update DELAY, IDLE, REQUESTED and PING_RESPONSE ACK serial
* numbers */
if (prior == rxrpc_ack_priority[call->ackr_reason]) {
- if (prior <= 4)
+ if (prior <= 4) {
+ call->ackr_skew = skew;
call->ackr_serial = serial;
+ }
if (immediate)
goto cancel_timer;
return;
@@ -103,13 +105,13 @@ cancel_timer:
* propose an ACK be sent, locking the call structure
*/
void rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
- u32 serial, bool immediate)
+ u16 skew, u32 serial, bool immediate)
{
s8 prior = rxrpc_ack_priority[ack_reason];
if (prior > rxrpc_ack_priority[call->ackr_reason]) {
spin_lock_bh(&call->lock);
- __rxrpc_propose_ACK(call, ack_reason, serial, immediate);
+ __rxrpc_propose_ACK(call, ack_reason, skew, serial, immediate);
spin_unlock_bh(&call->lock);
}
}
@@ -628,7 +630,7 @@ process_further:
if (ack.reason == RXRPC_ACK_PING) {
_proto("Rx ACK %%%u PING Request", latest);
rxrpc_propose_ACK(call, RXRPC_ACK_PING_RESPONSE,
- sp->hdr.serial, true);
+ skb->priority, sp->hdr.serial, true);
}
/* discard any out-of-order or duplicate ACKs */
@@ -1153,8 +1155,7 @@ skip_msg_init:
goto maybe_reschedule;
send_ACK_with_skew:
- ack.maxSkew = htons(atomic_read(&call->conn->hi_serial) -
- ntohl(ack.serial));
+ ack.maxSkew = htons(call->ackr_skew);
send_ACK:
mtu = call->conn->params.peer->if_mtu;
mtu -= call->conn->params.peer->hdrsize;
@@ -1244,7 +1245,8 @@ send_message_2:
case RXRPC_CALL_SERVER_ACK_REQUEST:
_debug("start ACK timer");
rxrpc_propose_ACK(call, RXRPC_ACK_DELAY,
- call->ackr_serial, false);
+ call->ackr_skew, call->ackr_serial,
+ false);
default:
break;
}
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 70bb77818dea..34f7431bf494 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -125,6 +125,7 @@ static int rxrpc_fast_process_data(struct rxrpc_call *call,
bool terminal;
int ret, ackbit, ack;
u32 serial;
+ u16 skew;
u8 flags;
_enter("{%u,%u},,{%u}", call->rx_data_post, call->rx_first_oos, seq);
@@ -133,6 +134,7 @@ static int rxrpc_fast_process_data(struct rxrpc_call *call,
ASSERTCMP(sp->call, ==, NULL);
flags = sp->hdr.flags;
serial = sp->hdr.serial;
+ skew = skb->priority;
spin_lock(&call->lock);
@@ -231,7 +233,7 @@ static int rxrpc_fast_process_data(struct rxrpc_call *call,
spin_unlock(&call->lock);
atomic_inc(&call->ackr_not_idle);
- rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, serial, false);
+ rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, skew, serial, false);
_leave(" = 0 [posted]");
return 0;
@@ -244,7 +246,7 @@ out:
discard_and_ack:
_debug("discard and ACK packet %p", skb);
- __rxrpc_propose_ACK(call, ack, serial, true);
+ __rxrpc_propose_ACK(call, ack, skew, serial, true);
discard:
spin_unlock(&call->lock);
rxrpc_free_skb(skb);
@@ -252,7 +254,7 @@ discard:
return 0;
enqueue_and_ack:
- __rxrpc_propose_ACK(call, ack, serial, true);
+ __rxrpc_propose_ACK(call, ack, skew, serial, true);
enqueue_packet:
_net("defer skb %p", skb);
spin_unlock(&call->lock);
@@ -304,7 +306,7 @@ void rxrpc_fast_process_packet(struct rxrpc_call *call, struct sk_buff *skb)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
__be32 wtmp;
- u32 hi_serial, abort_code;
+ u32 abort_code;
_enter("%p,%p", call, skb);
@@ -321,18 +323,12 @@ void rxrpc_fast_process_packet(struct rxrpc_call *call, struct sk_buff *skb)
}
#endif
- /* track the latest serial number on this connection for ACK packet
- * information */
- hi_serial = atomic_read(&call->conn->hi_serial);
- while (sp->hdr.serial > hi_serial)
- hi_serial = atomic_cmpxchg(&call->conn->hi_serial, hi_serial,
- sp->hdr.serial);
-
/* request ACK generation for any ACK or DATA packet that requests
* it */
if (sp->hdr.flags & RXRPC_REQUEST_ACK) {
_proto("ACK Requested on %%%u", sp->hdr.serial);
- rxrpc_propose_ACK(call, RXRPC_ACK_REQUESTED, sp->hdr.serial, false);
+ rxrpc_propose_ACK(call, RXRPC_ACK_REQUESTED,
+ skb->priority, sp->hdr.serial, false);
}
switch (sp->hdr.type) {
@@ -637,7 +633,7 @@ void rxrpc_data_ready(struct sock *sk)
struct rxrpc_skb_priv *sp;
struct rxrpc_local *local = sk->sk_user_data;
struct sk_buff *skb;
- int ret;
+ int ret, skew;
_enter("%p", sk);
@@ -700,8 +696,21 @@ void rxrpc_data_ready(struct sock *sk)
rcu_read_lock();
conn = rxrpc_find_connection_rcu(local, skb);
- if (!conn)
+ if (!conn) {
+ skb->priority = 0;
goto cant_route_call;
+ }
+
+ /* Note the serial number skew here */
+ skew = (int)sp->hdr.serial - (int)conn->hi_serial;
+ if (skew >= 0) {
+ if (skew > 0)
+ conn->hi_serial = sp->hdr.serial;
+ skb->priority = 0;
+ } else {
+ skew = -skew;
+ skb->priority = min(skew, 65535);
+ }
if (sp->hdr.callNumber == 0) {
/* Connection-level packet */
diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c
index f92de18b5893..31b7f36a39cb 100644
--- a/net/rxrpc/proc.c
+++ b/net/rxrpc/proc.c
@@ -165,7 +165,7 @@ static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
rxrpc_conn_states[conn->state],
key_serial(conn->params.key),
atomic_read(&conn->serial),
- atomic_read(&conn->hi_serial));
+ conn->hi_serial);
return 0;
}
diff --git a/net/rxrpc/skbuff.c b/net/rxrpc/skbuff.c
index d28058a97bc1..fbd8c74d9505 100644
--- a/net/rxrpc/skbuff.c
+++ b/net/rxrpc/skbuff.c
@@ -53,9 +53,9 @@ static void rxrpc_request_final_ACK(struct rxrpc_call *call)
/*
* drop the bottom ACK off of the call ACK window and advance the window
*/
-static void rxrpc_hard_ACK_data(struct rxrpc_call *call,
- struct rxrpc_skb_priv *sp)
+static void rxrpc_hard_ACK_data(struct rxrpc_call *call, struct sk_buff *skb)
{
+ struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
int loop;
u32 seq;
@@ -91,8 +91,8 @@ static void rxrpc_hard_ACK_data(struct rxrpc_call *call,
* its Tx bufferage.
*/
_debug("send Rx idle ACK");
- __rxrpc_propose_ACK(call, RXRPC_ACK_IDLE, sp->hdr.serial,
- false);
+ __rxrpc_propose_ACK(call, RXRPC_ACK_IDLE,
+ skb->priority, sp->hdr.serial, false);
}
spin_unlock_bh(&call->lock);
@@ -125,7 +125,7 @@ void rxrpc_kernel_data_consumed(struct rxrpc_call *call, struct sk_buff *skb)
ASSERTCMP(sp->hdr.seq, >, call->rx_data_eaten);
call->rx_data_recv = sp->hdr.seq;
- rxrpc_hard_ACK_data(call, sp);
+ rxrpc_hard_ACK_data(call, skb);
}
EXPORT_SYMBOL(rxrpc_kernel_data_consumed);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-29 07:42:32 +0300