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-rw-r--r--net/rxrpc/af_rxrpc.c5
-rw-r--r--net/rxrpc/ar-internal.h31
-rw-r--r--net/rxrpc/call_event.c111
-rw-r--r--net/rxrpc/call_object.c15
-rw-r--r--net/rxrpc/input.c145
-rw-r--r--net/rxrpc/insecure.c3
-rw-r--r--net/rxrpc/output.c89
-rw-r--r--net/rxrpc/proc.c9
-rw-r--r--net/rxrpc/rxkad.c102
-rw-r--r--net/rxrpc/sendmsg.c188
-rw-r--r--net/rxrpc/txbuf.c34
11 files changed, 309 insertions, 423 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index ceba28e9dce6..2f3991cf8715 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -39,7 +39,7 @@ atomic_t rxrpc_debug_id;
EXPORT_SYMBOL(rxrpc_debug_id);
/* count of skbs currently in use */
-atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
+atomic_t rxrpc_n_rx_skbs;
struct workqueue_struct *rxrpc_workqueue;
@@ -979,7 +979,7 @@ static int __init af_rxrpc_init(void)
goto error_call_jar;
}
- rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1);
+ rxrpc_workqueue = alloc_workqueue("krxrpcd", WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
if (!rxrpc_workqueue) {
pr_notice("Failed to allocate work queue\n");
goto error_work_queue;
@@ -1059,7 +1059,6 @@ static void __exit af_rxrpc_exit(void)
sock_unregister(PF_RXRPC);
proto_unregister(&rxrpc_proto);
unregister_pernet_device(&rxrpc_net_ops);
- ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
/* Make sure the local and peer records pinned by any dying connections
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index c6c5bb3d3688..d7aebe82e17c 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -195,7 +195,6 @@ struct rxrpc_host_header {
* - max 48 bytes (struct sk_buff::cb)
*/
struct rxrpc_skb_priv {
- u16 remain;
u16 offset; /* Offset of data */
u16 len; /* Length of data */
u8 flags;
@@ -243,7 +242,7 @@ struct rxrpc_security {
size_t *, size_t *, size_t *);
/* impose security on a packet */
- int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t);
+ int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *);
/* verify the security on a received packet */
int (*verify_packet)(struct rxrpc_call *, struct sk_buff *);
@@ -497,6 +496,7 @@ enum rxrpc_call_flag {
RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
+ RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
@@ -594,7 +594,7 @@ struct rxrpc_call {
struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
struct list_head sock_link; /* Link in rx->sock_calls */
struct rb_node sock_node; /* Node in rx->calls */
- struct sk_buff *tx_pending; /* Tx socket buffer being filled */
+ struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
wait_queue_head_t waitq; /* Wait queue for channel or Tx */
s64 tx_total_len; /* Total length left to be transmitted (or -1) */
__be32 crypto_buf[2]; /* Temporary packet crypto buffer */
@@ -632,22 +632,16 @@ struct rxrpc_call {
#define RXRPC_INIT_RX_WINDOW_SIZE 63
struct sk_buff **rxtx_buffer;
u8 *rxtx_annotations;
-#define RXRPC_TX_ANNO_ACK 0
-#define RXRPC_TX_ANNO_UNACK 1
-#define RXRPC_TX_ANNO_NAK 2
-#define RXRPC_TX_ANNO_RETRANS 3
-#define RXRPC_TX_ANNO_MASK 0x03
-#define RXRPC_TX_ANNO_LAST 0x04
-#define RXRPC_TX_ANNO_RESENT 0x08
-
- rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
- * not hard-ACK'd packet follows this.
- */
/* Transmitted data tracking. */
+ spinlock_t tx_lock; /* Transmit queue lock */
+ struct list_head tx_buffer; /* Buffer of transmissible packets */
+ rxrpc_seq_t tx_bottom; /* First packet in buffer */
+ rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */
rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
u16 tx_backoff; /* Delay to insert due to Tx failure */
u8 tx_winsize; /* Maximum size of Tx window */
+#define RXRPC_TX_MAX_WINDOW 128
/* Received data tracking */
struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */
@@ -657,6 +651,7 @@ struct rxrpc_call {
rxrpc_seq_t rx_consumed; /* Highest packet consumed */
rxrpc_serial_t rx_serial; /* Highest serial received for this call */
u8 rx_winsize; /* Size of Rx window */
+ spinlock_t input_lock; /* Lock for packet input to this call */
/* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
* is fixed, we keep these numbers in terms of segments (ie. DATA
@@ -671,8 +666,6 @@ struct rxrpc_call {
u8 cong_cumul_acks; /* Cumulative ACK count */
ktime_t cong_tstamp; /* Last time cwnd was changed */
- spinlock_t input_lock; /* Lock for packet input to this call */
-
/* Receive-phase ACK management (ACKs we send). */
u8 ackr_reason; /* reason to ACK */
rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
@@ -697,6 +690,7 @@ struct rxrpc_call {
ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
rxrpc_seq_t acks_first_seq; /* first sequence number received */
rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
+ rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
@@ -809,7 +803,7 @@ static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
/*
* af_rxrpc.c
*/
-extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
+extern atomic_t rxrpc_n_rx_skbs;
extern struct workqueue_struct *rxrpc_workqueue;
/*
@@ -831,6 +825,7 @@ void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
enum rxrpc_propose_ack_trace);
+void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
void rxrpc_process_call(struct work_struct *);
void rxrpc_reduce_call_timer(struct rxrpc_call *call,
@@ -1034,7 +1029,7 @@ static inline struct rxrpc_net *rxrpc_net(struct net *net)
*/
void rxrpc_transmit_ack_packets(struct rxrpc_local *);
int rxrpc_send_abort_packet(struct rxrpc_call *);
-int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
+int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
void rxrpc_reject_packets(struct rxrpc_local *);
void rxrpc_send_keepalive(struct rxrpc_peer *);
diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index 36f60ac1d95d..3c37b280eb20 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -148,62 +148,52 @@ static void rxrpc_congestion_timeout(struct rxrpc_call *call)
*/
static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
{
- struct sk_buff *skb;
+ struct rxrpc_txbuf *txb;
unsigned long resend_at;
- rxrpc_seq_t cursor, seq, top;
+ rxrpc_seq_t transmitted = READ_ONCE(call->tx_transmitted);
ktime_t now, max_age, oldest, ack_ts;
- int ix;
- u8 annotation, anno_type, retrans = 0, unacked = 0;
+ bool unacked = false;
+ LIST_HEAD(retrans_queue);
- _enter("{%d,%d}", call->tx_hard_ack, call->tx_top);
+ _enter("{%d,%d}", call->acks_hard_ack, call->tx_top);
now = ktime_get_real();
max_age = ktime_sub_us(now, jiffies_to_usecs(call->peer->rto_j));
- spin_lock_bh(&call->lock);
-
- cursor = call->tx_hard_ack;
- top = call->tx_top;
- ASSERT(before_eq(cursor, top));
- if (cursor == top)
- goto out_unlock;
+ spin_lock(&call->tx_lock);
/* Scan the packet list without dropping the lock and decide which of
* the packets in the Tx buffer we're going to resend and what the new
* resend timeout will be.
*/
- trace_rxrpc_resend(call, (cursor + 1) & RXRPC_RXTX_BUFF_MASK);
+ trace_rxrpc_resend(call);
oldest = now;
- for (seq = cursor + 1; before_eq(seq, top); seq++) {
- ix = seq & RXRPC_RXTX_BUFF_MASK;
- annotation = call->rxtx_annotations[ix];
- anno_type = annotation & RXRPC_TX_ANNO_MASK;
- annotation &= ~RXRPC_TX_ANNO_MASK;
- if (anno_type == RXRPC_TX_ANNO_ACK)
+ list_for_each_entry(txb, &call->tx_buffer, call_link) {
+ if (test_bit(RXRPC_TXBUF_ACKED, &txb->flags))
continue;
+ if (after(txb->seq, transmitted))
+ break;
- skb = call->rxtx_buffer[ix];
- rxrpc_see_skb(skb, rxrpc_skb_seen);
+ rxrpc_see_txbuf(txb, rxrpc_txbuf_see_unacked);
- if (anno_type == RXRPC_TX_ANNO_UNACK) {
- if (ktime_after(skb->tstamp, max_age)) {
- if (ktime_before(skb->tstamp, oldest))
- oldest = skb->tstamp;
+ if (test_bit(RXRPC_TXBUF_RESENT, &txb->flags)) {
+ if (ktime_after(txb->last_sent, max_age)) {
+ if (ktime_before(txb->last_sent, oldest))
+ oldest = txb->last_sent;
continue;
}
- if (!(annotation & RXRPC_TX_ANNO_RESENT))
- unacked++;
+ unacked = true;
}
- /* Okay, we need to retransmit a packet. */
- call->rxtx_annotations[ix] = RXRPC_TX_ANNO_RETRANS | annotation;
- retrans++;
- trace_rxrpc_retransmit(call, seq, annotation | anno_type,
- ktime_to_ns(ktime_sub(skb->tstamp, max_age)));
+ rxrpc_get_txbuf(txb, rxrpc_txbuf_get_retrans);
+ list_move_tail(&txb->tx_link, &retrans_queue);
}
+ spin_unlock(&call->tx_lock);
+
resend_at = nsecs_to_jiffies(ktime_to_ns(ktime_sub(now, oldest)));
- resend_at += jiffies + rxrpc_get_rto_backoff(call->peer, retrans);
+ resend_at += jiffies + rxrpc_get_rto_backoff(call->peer,
+ !list_empty(&retrans_queue));
WRITE_ONCE(call->resend_at, resend_at);
if (unacked)
@@ -213,7 +203,8 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
* that an ACK got lost somewhere. Send a ping to find out instead of
* retransmitting data.
*/
- if (!retrans) {
+ if (list_empty(&retrans_queue)) {
+ spin_lock_bh(&call->lock);
rxrpc_reduce_call_timer(call, resend_at, now_j,
rxrpc_timer_set_for_resend);
spin_unlock_bh(&call->lock);
@@ -225,50 +216,19 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
goto out;
}
- /* Now go through the Tx window and perform the retransmissions. We
- * have to drop the lock for each send. If an ACK comes in whilst the
- * lock is dropped, it may clear some of the retransmission markers for
- * packets that it soft-ACKs.
- */
- for (seq = cursor + 1; before_eq(seq, top); seq++) {
- ix = seq & RXRPC_RXTX_BUFF_MASK;
- annotation = call->rxtx_annotations[ix];
- anno_type = annotation & RXRPC_TX_ANNO_MASK;
- if (anno_type != RXRPC_TX_ANNO_RETRANS)
- continue;
-
- /* We need to reset the retransmission state, but we need to do
- * so before we drop the lock as a new ACK/NAK may come in and
- * confuse things
- */
- annotation &= ~RXRPC_TX_ANNO_MASK;
- annotation |= RXRPC_TX_ANNO_UNACK | RXRPC_TX_ANNO_RESENT;
- call->rxtx_annotations[ix] = annotation;
-
- skb = call->rxtx_buffer[ix];
- if (!skb)
- continue;
-
- rxrpc_get_skb(skb, rxrpc_skb_got);
- spin_unlock_bh(&call->lock);
-
+ while ((txb = list_first_entry_or_null(&retrans_queue,
+ struct rxrpc_txbuf, tx_link))) {
+ list_del_init(&txb->tx_link);
+ set_bit(RXRPC_TXBUF_RESENT, &txb->flags);
rxrpc_inc_stat(call->rxnet, stat_tx_data_retrans);
- if (rxrpc_send_data_packet(call, skb, true) < 0) {
- rxrpc_free_skb(skb, rxrpc_skb_freed);
- return;
- }
+ rxrpc_send_data_packet(call, txb);
+ rxrpc_put_txbuf(txb, rxrpc_txbuf_put_trans);
- if (rxrpc_is_client_call(call))
- rxrpc_expose_client_call(call);
-
- rxrpc_free_skb(skb, rxrpc_skb_freed);
- spin_lock_bh(&call->lock);
- if (after(call->tx_hard_ack, seq))
- seq = call->tx_hard_ack;
+ trace_rxrpc_retransmit(call, txb->seq,
+ ktime_to_ns(ktime_sub(txb->last_sent,
+ max_age)));
}
-out_unlock:
- spin_unlock_bh(&call->lock);
out:
_leave("");
}
@@ -301,6 +261,9 @@ recheck_state:
goto recheck_state;
}
+ if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom)
+ rxrpc_shrink_call_tx_buffer(call);
+
if (call->state == RXRPC_CALL_COMPLETE) {
rxrpc_delete_call_timer(call);
goto out_put;
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index 4d8601c6a32d..ed5f6f0e4286 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -155,11 +155,13 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
INIT_LIST_HEAD(&call->accept_link);
INIT_LIST_HEAD(&call->recvmsg_link);
INIT_LIST_HEAD(&call->sock_link);
+ INIT_LIST_HEAD(&call->tx_buffer);
skb_queue_head_init(&call->recvmsg_queue);
skb_queue_head_init(&call->rx_oos_queue);
init_waitqueue_head(&call->waitq);
spin_lock_init(&call->lock);
spin_lock_init(&call->notify_lock);
+ spin_lock_init(&call->tx_lock);
spin_lock_init(&call->input_lock);
rwlock_init(&call->state_lock);
refcount_set(&call->ref, 1);
@@ -175,7 +177,7 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
call->tx_winsize = 16;
call->cong_cwnd = 2;
- call->cong_ssthresh = RXRPC_RXTX_BUFF_SIZE - 1;
+ call->cong_ssthresh = RXRPC_TX_MAX_WINDOW;
call->rxnet = rxnet;
call->rtt_avail = RXRPC_CALL_RTT_AVAIL_MASK;
@@ -510,7 +512,7 @@ void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
}
/*
- * Clean up the RxTx skb ring.
+ * Clean up the Rx skb ring.
*/
static void rxrpc_cleanup_ring(struct rxrpc_call *call)
{
@@ -686,6 +688,8 @@ static void rxrpc_rcu_destroy_call(struct rcu_head *rcu)
*/
void rxrpc_cleanup_call(struct rxrpc_call *call)
{
+ struct rxrpc_txbuf *txb;
+
_net("DESTROY CALL %d", call->debug_id);
memset(&call->sock_node, 0xcd, sizeof(call->sock_node));
@@ -694,7 +698,12 @@ void rxrpc_cleanup_call(struct rxrpc_call *call)
ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags));
rxrpc_cleanup_ring(call);
- rxrpc_free_skb(call->tx_pending, rxrpc_skb_cleaned);
+ while ((txb = list_first_entry_or_null(&call->tx_buffer,
+ struct rxrpc_txbuf, call_link))) {
+ list_del(&txb->call_link);
+ rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned);
+ }
+ rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned);
call_rcu(&call->rcu, rxrpc_rcu_destroy_call);
}
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 947e7196e2be..b1f7debd4f3e 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -32,7 +32,7 @@ static void rxrpc_congestion_management(struct rxrpc_call *call,
bool resend = false;
summary->flight_size =
- (call->tx_top - call->tx_hard_ack) - summary->nr_acks;
+ (call->tx_top - call->acks_hard_ack) - summary->nr_acks;
if (test_and_clear_bit(RXRPC_CALL_RETRANS_TIMEOUT, &call->flags)) {
summary->retrans_timeo = true;
@@ -150,8 +150,8 @@ resume_normality:
out:
cumulative_acks = 0;
out_no_clear_ca:
- if (cwnd >= RXRPC_RXTX_BUFF_SIZE - 1)
- cwnd = RXRPC_RXTX_BUFF_SIZE - 1;
+ if (cwnd >= RXRPC_TX_MAX_WINDOW)
+ cwnd = RXRPC_TX_MAX_WINDOW;
call->cong_cwnd = cwnd;
call->cong_cumul_acks = cumulative_acks;
trace_rxrpc_congest(call, summary, acked_serial, change);
@@ -169,9 +169,8 @@ send_extra_data:
/* Send some previously unsent DATA if we have some to advance the ACK
* state.
*/
- if (call->rxtx_annotations[call->tx_top & RXRPC_RXTX_BUFF_MASK] &
- RXRPC_TX_ANNO_LAST ||
- summary->nr_acks != call->tx_top - call->tx_hard_ack) {
+ if (test_bit(RXRPC_CALL_TX_LAST, &call->flags) ||
+ summary->nr_acks != call->tx_top - call->acks_hard_ack) {
call->cong_extra++;
wake_up(&call->waitq);
}
@@ -184,53 +183,40 @@ send_extra_data:
static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
struct rxrpc_ack_summary *summary)
{
- struct sk_buff *skb, *list = NULL;
+ struct rxrpc_txbuf *txb;
bool rot_last = false;
- int ix;
- u8 annotation;
- if (call->acks_lowest_nak == call->tx_hard_ack) {
- call->acks_lowest_nak = to;
- } else if (before_eq(call->acks_lowest_nak, to)) {
- summary->new_low_nack = true;
- call->acks_lowest_nak = to;
- }
-
- spin_lock(&call->lock);
-
- while (before(call->tx_hard_ack, to)) {
- call->tx_hard_ack++;
- ix = call->tx_hard_ack & RXRPC_RXTX_BUFF_MASK;
- skb = call->rxtx_buffer[ix];
- annotation = call->rxtx_annotations[ix];
- rxrpc_see_skb(skb, rxrpc_skb_rotated);
- call->rxtx_buffer[ix] = NULL;
- call->rxtx_annotations[ix] = 0;
- skb->next = list;
- list = skb;
-
- if (annotation & RXRPC_TX_ANNO_LAST) {
+ list_for_each_entry_rcu(txb, &call->tx_buffer, call_link, false) {
+ if (before_eq(txb->seq, call->acks_hard_ack))
+ continue;
+ if (!test_bit(RXRPC_TXBUF_ACKED, &txb->flags))
+ summary->nr_rot_new_acks++;
+ if (test_bit(RXRPC_TXBUF_LAST, &txb->flags)) {
set_bit(RXRPC_CALL_TX_LAST, &call->flags);
rot_last = true;
}
- if ((annotation & RXRPC_TX_ANNO_MASK) != RXRPC_TX_ANNO_ACK)
- summary->nr_rot_new_acks++;
+ if (txb->seq == to)
+ break;
}
- spin_unlock(&call->lock);
+ if (rot_last)
+ set_bit(RXRPC_CALL_TX_ALL_ACKED, &call->flags);
- trace_rxrpc_transmit(call, (rot_last ?
- rxrpc_transmit_rotate_last :
- rxrpc_transmit_rotate));
- wake_up(&call->waitq);
+ _enter("%x,%x,%x,%d", to, call->acks_hard_ack, call->tx_top, rot_last);
- while (list) {
- skb = list;
- list = skb->next;
- skb_mark_not_on_list(skb);
- rxrpc_free_skb(skb, rxrpc_skb_freed);
+ if (call->acks_lowest_nak == call->acks_hard_ack) {
+ call->acks_lowest_nak = to;
+ } else if (before_eq(call->acks_lowest_nak, to)) {
+ summary->new_low_nack = true;
+ call->acks_lowest_nak = to;
}
+ smp_store_release(&call->acks_hard_ack, to);
+
+ trace_rxrpc_txqueue(call, (rot_last ?
+ rxrpc_txqueue_rotate_last :
+ rxrpc_txqueue_rotate));
+ wake_up(&call->waitq);
return rot_last;
}
@@ -270,9 +256,9 @@ static bool rxrpc_end_tx_phase(struct rxrpc_call *call, bool reply_begun,
write_unlock(&call->state_lock);
if (state == RXRPC_CALL_CLIENT_AWAIT_REPLY)
- trace_rxrpc_transmit(call, rxrpc_transmit_await_reply);
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_await_reply);
else
- trace_rxrpc_transmit(call, rxrpc_transmit_end);
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_end);
_leave(" = ok");
return true;
@@ -678,30 +664,21 @@ static void rxrpc_complete_rtt_probe(struct rxrpc_call *call,
*/
static void rxrpc_input_check_for_lost_ack(struct rxrpc_call *call)
{
- rxrpc_seq_t top, bottom, seq;
+ struct rxrpc_txbuf *txb;
+ rxrpc_seq_t top, bottom;
bool resend = false;
- spin_lock_bh(&call->lock);
-
- bottom = call->tx_hard_ack + 1;
- top = call->acks_lost_top;
+ bottom = READ_ONCE(call->acks_hard_ack) + 1;
+ top = READ_ONCE(call->acks_lost_top);
if (before(bottom, top)) {
- for (seq = bottom; before_eq(seq, top); seq++) {
- int ix = seq & RXRPC_RXTX_BUFF_MASK;
- u8 annotation = call->rxtx_annotations[ix];
- u8 anno_type = annotation & RXRPC_TX_ANNO_MASK;
-
- if (anno_type != RXRPC_TX_ANNO_UNACK)
+ list_for_each_entry_rcu(txb, &call->tx_buffer, call_link, false) {
+ if (test_bit(RXRPC_TXBUF_ACKED, &txb->flags))
continue;
- annotation &= ~RXRPC_TX_ANNO_MASK;
- annotation |= RXRPC_TX_ANNO_RETRANS;
- call->rxtx_annotations[ix] = annotation;
+ set_bit(RXRPC_TXBUF_RETRANS, &txb->flags);
resend = true;
}
}
- spin_unlock_bh(&call->lock);
-
if (resend && !test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
rxrpc_queue_call(call);
}
@@ -735,8 +712,8 @@ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb,
ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU),
rwind, ntohl(ackinfo->jumbo_max));
- if (rwind > RXRPC_RXTX_BUFF_SIZE - 1)
- rwind = RXRPC_RXTX_BUFF_SIZE - 1;
+ if (rwind > RXRPC_TX_MAX_WINDOW)
+ rwind = RXRPC_TX_MAX_WINDOW;
if (call->tx_winsize != rwind) {
if (rwind > call->tx_winsize)
wake = true;
@@ -775,22 +752,24 @@ static void rxrpc_input_soft_acks(struct rxrpc_call *call, u8 *acks,
rxrpc_seq_t seq, int nr_acks,
struct rxrpc_ack_summary *summary)
{
- int ix;
- u8 annotation, anno_type;
-
- for (; nr_acks > 0; nr_acks--, seq++) {
- ix = seq & RXRPC_RXTX_BUFF_MASK;
- annotation = call->rxtx_annotations[ix];
- anno_type = annotation & RXRPC_TX_ANNO_MASK;
- annotation &= ~RXRPC_TX_ANNO_MASK;
- switch (*acks++) {
+ struct rxrpc_txbuf *txb;
+
+ list_for_each_entry_rcu(txb, &call->tx_buffer, call_link, false) {
+ if (before(txb->seq, seq))
+ continue;
+ if (after_eq(txb->seq, seq + nr_acks))
+ break;
+ switch (acks[txb->seq - seq]) {
case RXRPC_ACK_TYPE_ACK:
summary->nr_acks++;
- if (anno_type == RXRPC_TX_ANNO_ACK)
+ if (test_bit(RXRPC_TXBUF_ACKED, &txb->flags))
continue;
+ /* A lot of the time the packet is going to
+ * have been ACK.'d already.
+ */
+ clear_bit(RXRPC_TXBUF_NACKED, &txb->flags);
+ set_bit(RXRPC_TXBUF_ACKED, &txb->flags);
summary->nr_new_acks++;
- call->rxtx_annotations[ix] =
- RXRPC_TX_ANNO_ACK | annotation;
break;
case RXRPC_ACK_TYPE_NACK:
if (!summary->nr_nacks &&
@@ -799,13 +778,12 @@ static void rxrpc_input_soft_acks(struct rxrpc_call *call, u8 *acks,
summary->new_low_nack = true;
}
summary->nr_nacks++;
- if (anno_type == RXRPC_TX_ANNO_NAK)
+ if (test_bit(RXRPC_TXBUF_NACKED, &txb->flags))
continue;
summary->nr_new_nacks++;
- if (anno_type == RXRPC_TX_ANNO_RETRANS)
- continue;
- call->rxtx_annotations[ix] =
- RXRPC_TX_ANNO_NAK | annotation;
+ clear_bit(RXRPC_TXBUF_ACKED, &txb->flags);
+ set_bit(RXRPC_TXBUF_NACKED, &txb->flags);
+ set_bit(RXRPC_TXBUF_RETRANS, &txb->flags);
break;
default:
return rxrpc_proto_abort("SFT", call, 0);
@@ -930,7 +908,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
if (unlikely(buf.ack.reason == RXRPC_ACK_OUT_OF_SEQUENCE) &&
first_soft_ack == 1 &&
prev_pkt == 0 &&
- call->tx_hard_ack == 0 &&
+ call->acks_hard_ack == 0 &&
rxrpc_is_client_call(call)) {
rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
0, -ENETRESET);
@@ -989,7 +967,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
goto out;
}
- if (before(hard_ack, call->tx_hard_ack) ||
+ if (before(hard_ack, call->acks_hard_ack) ||
after(hard_ack, call->tx_top)) {
rxrpc_proto_abort("AKW", call, 0);
goto out;
@@ -999,7 +977,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
goto out;
}
- if (after(hard_ack, call->tx_hard_ack)) {
+ if (after(hard_ack, call->acks_hard_ack)) {
if (rxrpc_rotate_tx_window(call, hard_ack, &summary)) {
rxrpc_end_tx_phase(call, false, "ETA");
goto out;
@@ -1015,8 +993,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
&summary);
}
- if (call->rxtx_annotations[call->tx_top & RXRPC_RXTX_BUFF_MASK] &
- RXRPC_TX_ANNO_LAST &&
+ if (test_bit(RXRPC_CALL_TX_LAST, &call->flags) &&
summary.nr_acks == call->tx_top - hard_ack &&
rxrpc_is_client_call(call))
rxrpc_propose_ping(call, ack_serial,
diff --git a/net/rxrpc/insecure.c b/net/rxrpc/insecure.c
index fd68f0e3af27..0eb8471bfc53 100644
--- a/net/rxrpc/insecure.c
+++ b/net/rxrpc/insecure.c
@@ -25,8 +25,7 @@ static int none_how_much_data(struct rxrpc_call *call, size_t remain,
return 0;
}
-static int none_secure_packet(struct rxrpc_call *call, struct sk_buff *skb,
- size_t data_size)
+static int none_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
{
return 0;
}
diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c
index 0a4f37d7b6b5..e2f501cef040 100644
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -335,7 +335,7 @@ int rxrpc_send_abort_packet(struct rxrpc_call *call)
* channel instead, thereby closing off this call.
*/
if (rxrpc_is_client_call(call) &&
- test_bit(RXRPC_CALL_TX_LAST, &call->flags))
+ test_bit(RXRPC_CALL_TX_ALL_ACKED, &call->flags))
return 0;
if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags))
@@ -383,20 +383,17 @@ int rxrpc_send_abort_packet(struct rxrpc_call *call)
/*
* send a packet through the transport endpoint
*/
-int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
- bool retrans)
+int rxrpc_send_data_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
{
enum rxrpc_req_ack_trace why;
struct rxrpc_connection *conn = call->conn;
- struct rxrpc_wire_header whdr;
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
struct msghdr msg;
- struct kvec iov[2];
+ struct kvec iov[1];
rxrpc_serial_t serial;
size_t len;
int ret, rtt_slot = -1;
- _enter(",{%d}", skb->len);
+ _enter("%x,{%d}", txb->seq, txb->len);
if (hlist_unhashed(&call->error_link)) {
spin_lock_bh(&call->peer->lock);
@@ -406,29 +403,16 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
/* Each transmission of a Tx packet needs a new serial number */
serial = atomic_inc_return(&conn->serial);
-
- whdr.epoch = htonl(conn->proto.epoch);
- whdr.cid = htonl(call->cid);
- whdr.callNumber = htonl(call->call_id);
- whdr.seq = htonl(sp->hdr.seq);
- whdr.serial = htonl(serial);
- whdr.type = RXRPC_PACKET_TYPE_DATA;
- whdr.flags = sp->hdr.flags;
- whdr.userStatus = 0;
- whdr.securityIndex = call->security_ix;
- whdr._rsvd = htons(sp->hdr._rsvd);
- whdr.serviceId = htons(call->service_id);
+ txb->wire.serial = htonl(serial);
if (test_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags) &&
- sp->hdr.seq == 1)
- whdr.userStatus = RXRPC_USERSTATUS_SERVICE_UPGRADE;
+ txb->seq == 1)
+ txb->wire.userStatus = RXRPC_USERSTATUS_SERVICE_UPGRADE;
- iov[0].iov_base = &whdr;
- iov[0].iov_len = sizeof(whdr);
- iov[1].iov_base = skb->head;
- iov[1].iov_len = skb->len;
- len = iov[0].iov_len + iov[1].iov_len;
- iov_iter_kvec(&msg.msg_iter, WRITE, iov, 2, len);
+ iov[0].iov_base = &txb->wire;
+ iov[0].iov_len = sizeof(txb->wire) + txb->len;
+ len = iov[0].iov_len;
+ iov_iter_kvec(&msg.msg_iter, WRITE, iov, 1, len);
msg.msg_name = &call->peer->srx.transport;
msg.msg_namelen = call->peer->srx.transport_len;
@@ -443,19 +427,19 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
* service call, lest OpenAFS incorrectly send us an ACK with some
* soft-ACKs in it and then never follow up with a proper hard ACK.
*/
- if (whdr.flags & RXRPC_REQUEST_ACK)
+ if (txb->wire.flags & RXRPC_REQUEST_ACK)
why = rxrpc_reqack_already_on;
- else if ((whdr.flags & RXRPC_LAST_PACKET) && rxrpc_to_client(sp))
+ else if (test_bit(RXRPC_TXBUF_LAST, &txb->flags) && rxrpc_sending_to_client(txb))
why = rxrpc_reqack_no_srv_last;
else if (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events))
why = rxrpc_reqack_ack_lost;
- else if (retrans)
+ else if (test_bit(RXRPC_TXBUF_RESENT, &txb->flags))
why = rxrpc_reqack_retrans;
else if (call->cong_mode == RXRPC_CALL_SLOW_START && call->cong_cwnd <= 2)
why = rxrpc_reqack_slow_start;
else if (call->tx_winsize <= 2)
why = rxrpc_reqack_small_txwin;
- else if (call->peer->rtt_count < 3 && sp->hdr.seq & 1)
+ else if (call->peer->rtt_count < 3 && txb->seq & 1)
why = rxrpc_reqack_more_rtt;
else if (ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000), ktime_get_real()))
why = rxrpc_reqack_old_rtt;
@@ -463,35 +447,36 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
goto dont_set_request_ack;
rxrpc_inc_stat(call->rxnet, stat_why_req_ack[why]);
- trace_rxrpc_req_ack(call->debug_id, sp->hdr.seq, why);
+ trace_rxrpc_req_ack(call->debug_id, txb->seq, why);
if (why != rxrpc_reqack_no_srv_last)
- whdr.flags |= RXRPC_REQUEST_ACK;
+ txb->wire.flags |= RXRPC_REQUEST_ACK;
dont_set_request_ack:
if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) {
static int lose;
if ((lose++ & 7) == 7) {
ret = 0;
- trace_rxrpc_tx_data(call, sp->hdr.seq, serial,
- whdr.flags, retrans, true);
+ trace_rxrpc_tx_data(call, txb->seq, serial,
+ txb->wire.flags,
+ test_bit(RXRPC_TXBUF_RESENT, &txb->flags),
+ true);
goto done;
}
}
- trace_rxrpc_tx_data(call, sp->hdr.seq, serial, whdr.flags, retrans,
- false);
+ trace_rxrpc_tx_data(call, txb->seq, serial, txb->wire.flags,
+ test_bit(RXRPC_TXBUF_RESENT, &txb->flags), false);
+ cmpxchg(&call->tx_transmitted, txb->seq - 1, txb->seq);
/* send the packet with the don't fragment bit set if we currently
* think it's small enough */
- if (iov[1].iov_len >= call->peer->maxdata)
+ if (txb->len >= call->peer->maxdata)
goto send_fragmentable;
down_read(&conn->params.local->defrag_sem);
- sp->hdr.serial = serial;
- smp_wmb(); /* Set serial before timestamp */
- skb->tstamp = ktime_get_real();
- if (whdr.flags & RXRPC_REQUEST_ACK)
+ txb->last_sent = ktime_get_real();
+ if (txb->wire.flags & RXRPC_REQUEST_ACK)
rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_data);
/* send the packet by UDP
@@ -510,7 +495,7 @@ dont_set_request_ack:
trace_rxrpc_tx_fail(call->debug_id, serial, ret,
rxrpc_tx_point_call_data_nofrag);
} else {
- trace_rxrpc_tx_packet(call->debug_id, &whdr,
+ trace_rxrpc_tx_packet(call->debug_id, &txb->wire,
rxrpc_tx_point_call_data_nofrag);
}
@@ -520,8 +505,8 @@ dont_set_request_ack:
done:
if (ret >= 0) {
- if (whdr.flags & RXRPC_REQUEST_ACK) {
- call->peer->rtt_last_req = skb->tstamp;
+ if (txb->wire.flags & RXRPC_REQUEST_ACK) {
+ call->peer->rtt_last_req = txb->last_sent;
if (call->peer->rtt_count > 1) {
unsigned long nowj = jiffies, ack_lost_at;
@@ -533,7 +518,7 @@ done:
}
}
- if (sp->hdr.seq == 1 &&
+ if (txb->seq == 1 &&
!test_and_set_bit(RXRPC_CALL_BEGAN_RX_TIMER,
&call->flags)) {
unsigned long nowj = jiffies, expect_rx_by;
@@ -565,23 +550,21 @@ send_fragmentable:
down_write(&conn->params.local->defrag_sem);
- sp->hdr.serial = serial;
- smp_wmb(); /* Set serial before timestamp */
- skb->tstamp = ktime_get_real();
- if (whdr.flags & RXRPC_REQUEST_ACK)
+ txb->last_sent = ktime_get_real();
+ if (txb->wire.flags & RXRPC_REQUEST_ACK)
rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_data);
switch (conn->params.local->srx.transport.family) {
case AF_INET6:
case AF_INET:
ip_sock_set_mtu_discover(conn->params.local->socket->sk,
- IP_PMTUDISC_DONT);
+ IP_PMTUDISC_DONT);
rxrpc_inc_stat(call->rxnet, stat_tx_data_send_frag);
ret = do_udp_sendmsg(conn->params.local->socket, &msg, len);
conn->params.peer->last_tx_at = ktime_get_seconds();
ip_sock_set_mtu_discover(conn->params.local->socket->sk,
- IP_PMTUDISC_DO);
+ IP_PMTUDISC_DO);
break;
default:
@@ -593,7 +576,7 @@ send_fragmentable:
trace_rxrpc_tx_fail(call->debug_id, serial, ret,
rxrpc_tx_point_call_data_frag);
} else {
- trace_rxrpc_tx_packet(call->debug_id, &whdr,
+ trace_rxrpc_tx_packet(call->debug_id, &txb->wire,
rxrpc_tx_point_call_data_frag);
}
rxrpc_tx_backoff(call, ret);
diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c
index d48af0178866..0807753ec2dc 100644
--- a/net/rxrpc/proc.c
+++ b/net/rxrpc/proc.c
@@ -54,7 +54,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
struct rxrpc_call *call;
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
unsigned long timeout = 0;
- rxrpc_seq_t tx_hard_ack;
+ rxrpc_seq_t acks_hard_ack;
char lbuff[50], rbuff[50];
u64 wtmp;
@@ -91,7 +91,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
timeout -= jiffies;
}
- tx_hard_ack = READ_ONCE(call->tx_hard_ack);
+ acks_hard_ack = READ_ONCE(call->acks_hard_ack);
wtmp = atomic64_read_acquire(&call->ackr_window);
seq_printf(seq,
"UDP %-47.47s %-47.47s %4x %08x %08x %s %3u"
@@ -106,7 +106,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
rxrpc_call_states[call->state],
call->abort_code,
call->debug_id,
- tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
+ acks_hard_ack, READ_ONCE(call->tx_top) - acks_hard_ack,
lower_32_bits(wtmp), upper_32_bits(wtmp) - lower_32_bits(wtmp),
call->rx_serial,
timeout);
@@ -459,9 +459,8 @@ int rxrpc_stats_show(struct seq_file *seq, void *v)
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_slow_start]),
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_small_txwin]));
seq_printf(seq,
- "Buffers : txb=%u,%u rxb=%u\n",
+ "Buffers : txb=%u rxb=%u\n",
atomic_read(&rxrpc_nr_txbuf),
- atomic_read(&rxrpc_n_tx_skbs),
atomic_read(&rxrpc_n_rx_skbs));
return 0;
}
diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c
index d87c99b36e01..8fc055587f0e 100644
--- a/net/rxrpc/rxkad.c
+++ b/net/rxrpc/rxkad.c
@@ -259,11 +259,10 @@ static void rxkad_free_call_crypto(struct rxrpc_call *call)
* partially encrypt a packet (level 1 security)
*/
static int rxkad_secure_packet_auth(const struct rxrpc_call *call,
- struct sk_buff *skb, u32 data_size,
+ struct rxrpc_txbuf *txb,
struct skcipher_request *req)
{
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
- struct rxkad_level1_hdr hdr;
+ struct rxkad_level1_hdr *hdr = (void *)txb->data;
struct rxrpc_crypt iv;
struct scatterlist sg;
size_t pad;
@@ -271,22 +270,22 @@ static int rxkad_secure_packet_auth(const struct rxrpc_call *call,
_enter("");
- check = sp->hdr.seq ^ call->call_id;
- data_size |= (u32)check << 16;
-
- hdr.data_size = htonl(data_size);
- memcpy(skb->head, &hdr, sizeof(hdr));
+ check = txb->seq ^ ntohl(txb->wire.callNumber);
+ hdr->data_size = htonl((u32)check << 16 | txb->len);
- pad = sizeof(struct rxkad_level1_hdr) + data_size;
+ txb->len += sizeof(struct rxkad_level1_hdr);
+ pad = txb->len;
pad = RXKAD_ALIGN - pad;
pad &= RXKAD_ALIGN - 1;
- if (pad)
- skb_put_zero(skb, pad);
+ if (pad) {
+ memset(txb->data + txb->offset, 0, pad);
+ txb->len += pad;
+ }
/* start the encryption afresh */
memset(&iv, 0, sizeof(iv));
- sg_init_one(&sg, skb->head, 8);
+ sg_init_one(&sg, txb->data, 8);
skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, &sg, &sg, 8, iv.x);
@@ -301,87 +300,60 @@ static int rxkad_secure_packet_auth(const struct rxrpc_call *call,
* wholly encrypt a packet (level 2 security)
*/
static int rxkad_secure_packet_encrypt(const struct rxrpc_call *call,
- struct sk_buff *skb,
- u32 data_size,
+ struct rxrpc_txbuf *txb,
struct skcipher_request *req)
{
const struct rxrpc_key_token *token;
- struct rxkad_level2_hdr rxkhdr;
- struct rxrpc_skb_priv *sp;
+ struct rxkad_level2_hdr *rxkhdr = (void *)txb->data;
struct rxrpc_crypt iv;
- struct scatterlist sg[16];
- unsigned int len;
+ struct scatterlist sg;
size_t pad;
u16 check;
- int err;
-
- sp = rxrpc_skb(skb);
+ int ret;
_enter("");
- check = sp->hdr.seq ^ call->call_id;
+ check = txb->seq ^ ntohl(txb->wire.callNumber);
- rxkhdr.data_size = htonl(data_size | (u32)check << 16);
- rxkhdr.checksum = 0;
- memcpy(skb->head, &rxkhdr, sizeof(rxkhdr));
+ rxkhdr->data_size = htonl(txb->len | (u32)check << 16);
+ rxkhdr->checksum = 0;
- pad = sizeof(struct rxkad_level2_hdr) + data_size;
+ txb->len += sizeof(struct rxkad_level2_hdr);
+ pad = txb->len;
pad = RXKAD_ALIGN - pad;
pad &= RXKAD_ALIGN - 1;
- if (pad)
- skb_put_zero(skb, pad);
+ if (pad) {
+ memset(txb->data + txb->offset, 0, pad);
+ txb->len += pad;
+ }
/* encrypt from the session key */
token = call->conn->params.key->payload.data[0];
memcpy(&iv, token->kad->session_key, sizeof(iv));
- sg_init_one(&sg[0], skb->head, sizeof(rxkhdr));
+ sg_init_one(&sg, txb->data, txb->len);
skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher);
skcipher_request_set_callback(req, 0, NULL, NULL);
- skcipher_request_set_crypt(req, &sg[0], &sg[0], sizeof(rxkhdr), iv.x);
- crypto_skcipher_encrypt(req);
-
- /* we want to encrypt the skbuff in-place */
- err = -EMSGSIZE;
- if (skb_shinfo(skb)->nr_frags > 16)
- goto out;
-
- len = round_up(data_size, RXKAD_ALIGN);
-
- sg_init_table(sg, ARRAY_SIZE(sg));
- err = skb_to_sgvec(skb, sg, 8, len);
- if (unlikely(err < 0))
- goto out;
- skcipher_request_set_crypt(req, sg, sg, len, iv.x);
- crypto_skcipher_encrypt(req);
-
- _leave(" = 0");
- err = 0;
-
-out:
+ skcipher_request_set_crypt(req, &sg, &sg, txb->len, iv.x);
+ ret = crypto_skcipher_encrypt(req);
skcipher_request_zero(req);
- return err;
+ return ret;
}
/*
* checksum an RxRPC packet header
*/
-static int rxkad_secure_packet(struct rxrpc_call *call,
- struct sk_buff *skb,
- size_t data_size)
+static int rxkad_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
{
- struct rxrpc_skb_priv *sp;
struct skcipher_request *req;
struct rxrpc_crypt iv;
struct scatterlist sg;
u32 x, y;
int ret;
- sp = rxrpc_skb(skb);
-
- _enter("{%d{%x}},{#%u},%zu,",
+ _enter("{%d{%x}},{#%u},%u,",
call->debug_id, key_serial(call->conn->params.key),
- sp->hdr.seq, data_size);
+ txb->seq, txb->len);
if (!call->conn->rxkad.cipher)
return 0;
@@ -398,9 +370,9 @@ static int rxkad_secure_packet(struct rxrpc_call *call,
memcpy(&iv, call->conn->rxkad.csum_iv.x, sizeof(iv));
/* calculate the security checksum */
- x = (call->cid & RXRPC_CHANNELMASK) << (32 - RXRPC_CIDSHIFT);
- x |= sp->hdr.seq & 0x3fffffff;
- call->crypto_buf[0] = htonl(call->call_id);
+ x = (ntohl(txb->wire.cid) & RXRPC_CHANNELMASK) << (32 - RXRPC_CIDSHIFT);
+ x |= txb->seq & 0x3fffffff;
+ call->crypto_buf[0] = txb->wire.callNumber;
call->crypto_buf[1] = htonl(x);
sg_init_one(&sg, call->crypto_buf, 8);
@@ -414,17 +386,17 @@ static int rxkad_secure_packet(struct rxrpc_call *call,
y = (y >> 16) & 0xffff;
if (y == 0)
y = 1; /* zero checksums are not permitted */
- sp->hdr.cksum = y;
+ txb->wire.cksum = htons(y);
switch (call->conn->params.security_level) {
case RXRPC_SECURITY_PLAIN:
ret = 0;
break;
case RXRPC_SECURITY_AUTH:
- ret = rxkad_secure_packet_auth(call, skb, data_size, req);
+ ret = rxkad_secure_packet_auth(call, txb, req);
break;
case RXRPC_SECURITY_ENCRYPT:
- ret = rxkad_secure_packet_encrypt(call, skb, data_size, req);
+ ret = rxkad_secure_packet_encrypt(call, txb, req);
break;
default:
ret = -EPERM;
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index e32805a49324..a96ae7f58148 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -25,7 +25,7 @@ static bool rxrpc_check_tx_space(struct rxrpc_call *call, rxrpc_seq_t *_tx_win)
unsigned int win_size =
min_t(unsigned int, call->tx_winsize,
call->cong_cwnd + call->cong_extra);
- rxrpc_seq_t tx_win = READ_ONCE(call->tx_hard_ack);
+ rxrpc_seq_t tx_win = smp_load_acquire(&call->acks_hard_ack);
if (_tx_win)
*_tx_win = tx_win;
@@ -50,7 +50,12 @@ static int rxrpc_wait_for_tx_window_intr(struct rxrpc_sock *rx,
if (signal_pending(current))
return sock_intr_errno(*timeo);
- trace_rxrpc_transmit(call, rxrpc_transmit_wait);
+ if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom) {
+ rxrpc_shrink_call_tx_buffer(call);
+ continue;
+ }
+
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_wait);
*timeo = schedule_timeout(*timeo);
}
}
@@ -71,12 +76,11 @@ static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx,
rtt = 2;
timeout = rtt;
- tx_start = READ_ONCE(call->tx_hard_ack);
+ tx_start = smp_load_acquire(&call->acks_hard_ack);
for (;;) {
set_current_state(TASK_UNINTERRUPTIBLE);
- tx_win = READ_ONCE(call->tx_hard_ack);
if (rxrpc_check_tx_space(call, &tx_win))
return 0;
@@ -87,12 +91,17 @@ static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx,
tx_win == tx_start && signal_pending(current))
return -EINTR;
+ if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom) {
+ rxrpc_shrink_call_tx_buffer(call);
+ continue;
+ }
+
if (tx_win != tx_start) {
timeout = rtt;
tx_start = tx_win;
}
- trace_rxrpc_transmit(call, rxrpc_transmit_wait);
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_wait);
timeout = schedule_timeout(timeout);
}
}
@@ -112,7 +121,12 @@ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx,
if (call->state >= RXRPC_CALL_COMPLETE)
return call->error;
- trace_rxrpc_transmit(call, rxrpc_transmit_wait);
+ if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom) {
+ rxrpc_shrink_call_tx_buffer(call);
+ continue;
+ }
+
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_wait);
*timeo = schedule_timeout(*timeo);
}
}
@@ -129,8 +143,8 @@ static int rxrpc_wait_for_tx_window(struct rxrpc_sock *rx,
DECLARE_WAITQUEUE(myself, current);
int ret;
- _enter(",{%u,%u,%u}",
- call->tx_hard_ack, call->tx_top, call->tx_winsize);
+ _enter(",{%u,%u,%u,%u}",
+ call->tx_bottom, call->acks_hard_ack, call->tx_top, call->tx_winsize);
add_wait_queue(&call->waitq, &myself);
@@ -155,24 +169,6 @@ static int rxrpc_wait_for_tx_window(struct rxrpc_sock *rx,
}
/*
- * Schedule an instant Tx resend.
- */
-static inline void rxrpc_instant_resend(struct rxrpc_call *call, int ix)
-{
- spin_lock_bh(&call->lock);
-
- if (call->state < RXRPC_CALL_COMPLETE) {
- call->rxtx_annotations[ix] =
- (call->rxtx_annotations[ix] & RXRPC_TX_ANNO_LAST) |
- RXRPC_TX_ANNO_RETRANS;
- if (!test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
- rxrpc_queue_call(call);
- }
-
- spin_unlock_bh(&call->lock);
-}
-
-/*
* Notify the owner of the call that the transmit phase is ended and the last
* packet has been queued.
*/
@@ -188,40 +184,35 @@ static void rxrpc_notify_end_tx(struct rxrpc_sock *rx, struct rxrpc_call *call,
* the packet immediately. Returns the error from rxrpc_send_data_packet()
* in case the caller wants to do something with it.
*/
-static int rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
- struct sk_buff *skb, bool last,
- rxrpc_notify_end_tx_t notify_end_tx)
+static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
+ struct rxrpc_txbuf *txb,
+ rxrpc_notify_end_tx_t notify_end_tx)
{
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
unsigned long now;
- rxrpc_seq_t seq = sp->hdr.seq;
- int ret, ix;
- u8 annotation = RXRPC_TX_ANNO_UNACK;
-
- _net("queue skb %p [%d]", skb, seq);
+ rxrpc_seq_t seq = txb->seq;
+ bool last = test_bit(RXRPC_TXBUF_LAST, &txb->flags);
+ int ret;
rxrpc_inc_stat(call->rxnet, stat_tx_data);
ASSERTCMP(seq, ==, call->tx_top + 1);
- if (last)
- annotation |= RXRPC_TX_ANNO_LAST;
-
/* We have to set the timestamp before queueing as the retransmit
* algorithm can see the packet as soon as we queue it.
*/
- skb->tstamp = ktime_get_real();
+ txb->last_sent = ktime_get_real();
- ix = seq & RXRPC_RXTX_BUFF_MASK;
- rxrpc_get_skb(skb, rxrpc_skb_got);
- call->rxtx_annotations[ix] = annotation;
- smp_wmb();
- call->rxtx_buffer[ix] = skb;
+ /* Add the packet to the call's output buffer */
+ rxrpc_get_txbuf(txb, rxrpc_txbuf_get_buffer);
+ spin_lock(&call->tx_lock);
+ list_add_tail(&txb->call_link, &call->tx_buffer);
call->tx_top = seq;
+ spin_unlock(&call->tx_lock);
+
if (last)
- trace_rxrpc_transmit(call, rxrpc_transmit_queue_last);
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_queue_last);
else
- trace_rxrpc_transmit(call, rxrpc_transmit_queue);
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_queue);
if (last || call->state == RXRPC_CALL_SERVER_ACK_REQUEST) {
_debug("________awaiting reply/ACK__________");
@@ -254,7 +245,7 @@ static int rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
if (seq == 1 && rxrpc_is_client_call(call))
rxrpc_expose_client_call(call);
- ret = rxrpc_send_data_packet(call, skb, false);
+ ret = rxrpc_send_data_packet(call, txb);
if (ret < 0) {
switch (ret) {
case -ENETUNREACH:
@@ -264,8 +255,6 @@ static int rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
0, ret);
goto out;
}
- _debug("need instant resend %d", ret);
- rxrpc_instant_resend(call, ix);
} else {
unsigned long now = jiffies;
unsigned long resend_at = now + call->peer->rto_j;
@@ -276,9 +265,7 @@ static int rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
}
out:
- rxrpc_free_skb(skb, rxrpc_skb_freed);
- _leave(" = %d", ret);
- return ret;
+ rxrpc_put_txbuf(txb, rxrpc_txbuf_put_trans);
}
/*
@@ -292,8 +279,7 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
rxrpc_notify_end_tx_t notify_end_tx,
bool *_dropped_lock)
{
- struct rxrpc_skb_priv *sp;
- struct sk_buff *skb;
+ struct rxrpc_txbuf *txb;
struct sock *sk = &rx->sk;
enum rxrpc_call_state state;
long timeo;
@@ -327,14 +313,15 @@ reload:
goto maybe_error;
}
- skb = call->tx_pending;
+ txb = call->tx_pending;
call->tx_pending = NULL;
- rxrpc_see_skb(skb, rxrpc_skb_seen);
+ if (txb)
+ rxrpc_see_txbuf(txb, rxrpc_txbuf_see_send_more);
do {
rxrpc_transmit_ack_packets(call->peer->local);
- if (!skb) {
+ if (!txb) {
size_t remain, bufsize, chunk, offset;
_debug("alloc");
@@ -355,52 +342,31 @@ reload:
_debug("SIZE: %zu/%zu @%zu", chunk, bufsize, offset);
/* create a buffer that we can retain until it's ACK'd */
- skb = sock_alloc_send_skb(
- sk, bufsize, msg->msg_flags & MSG_DONTWAIT, &ret);
- if (!skb)
+ ret = -ENOMEM;
+ txb = rxrpc_alloc_txbuf(call, RXRPC_PACKET_TYPE_DATA,
+ GFP_KERNEL);
+ if (!txb)
goto maybe_error;
- sp = rxrpc_skb(skb);
- rxrpc_new_skb(skb, rxrpc_skb_new);
-
- _debug("ALLOC SEND %p", skb);
-
- ASSERTCMP(skb->mark, ==, 0);
-
- __skb_put(skb, offset);
-
- sp->remain = chunk;
- if (sp->remain > skb_tailroom(skb))
- sp->remain = skb_tailroom(skb);
-
- _net("skb: hr %d, tr %d, hl %d, rm %d",
- skb_headroom(skb),
- skb_tailroom(skb),
- skb_headlen(skb),
- sp->remain);
-
- skb->ip_summed = CHECKSUM_UNNECESSARY;
+ txb->offset = offset;
+ txb->space -= offset;
+ txb->space = min_t(size_t, chunk, txb->space);
}
_debug("append");
- sp = rxrpc_skb(skb);
/* append next segment of data to the current buffer */
if (msg_data_left(msg) > 0) {
- int copy = skb_tailroom(skb);
- ASSERTCMP(copy, >, 0);
- if (copy > msg_data_left(msg))
- copy = msg_data_left(msg);
- if (copy > sp->remain)
- copy = sp->remain;
-
- _debug("add");
- ret = skb_add_data(skb, &msg->msg_iter, copy);
- _debug("added");
- if (ret < 0)
+ size_t copy = min_t(size_t, txb->space, msg_data_left(msg));
+
+ _debug("add %zu", copy);
+ if (!copy_from_iter_full(txb->data + txb->offset, copy,
+ &msg->msg_iter))
goto efault;
- sp->remain -= copy;
- skb->mark += copy;
+ _debug("added");
+ txb->space -= copy;
+ txb->len += copy;
+ txb->offset += copy;
copied += copy;
if (call->tx_total_len != -1)
call->tx_total_len -= copy;
@@ -412,32 +378,22 @@ reload:
goto call_terminated;
/* add the packet to the send queue if it's now full */
- if (sp->remain <= 0 ||
+ if (!txb->space ||
(msg_data_left(msg) == 0 && !more)) {
- struct rxrpc_connection *conn = call->conn;
- uint32_t seq;
-
- seq = call->tx_top + 1;
-
- sp->hdr.seq = seq;
- sp->hdr._rsvd = 0;
- sp->hdr.flags = conn->out_clientflag;
-
- if (msg_data_left(msg) == 0 && !more)
- sp->hdr.flags |= RXRPC_LAST_PACKET;
- else if (call->tx_top - call->tx_hard_ack <
+ if (msg_data_left(msg) == 0 && !more) {
+ txb->wire.flags |= RXRPC_LAST_PACKET;
+ __set_bit(RXRPC_TXBUF_LAST, &txb->flags);
+ }
+ else if (call->tx_top - call->acks_hard_ack <
call->tx_winsize)
- sp->hdr.flags |= RXRPC_MORE_PACKETS;
+ txb->wire.flags |= RXRPC_MORE_PACKETS;
- ret = call->security->secure_packet(call, skb, skb->mark);
+ ret = call->security->secure_packet(call, txb);
if (ret < 0)
goto out;
- ret = rxrpc_queue_packet(rx, call, skb,
- !msg_data_left(msg) && !more,
- notify_end_tx);
- /* Should check for failure here */
- skb = NULL;
+ rxrpc_queue_packet(rx, call, txb, notify_end_tx);
+ txb = NULL;
}
} while (msg_data_left(msg) > 0);
@@ -450,12 +406,12 @@ success:
read_unlock_bh(&call->state_lock);
}
out:
- call->tx_pending = skb;
+ call->tx_pending = txb;
_leave(" = %d", ret);
return ret;
call_terminated:
- rxrpc_free_skb(skb, rxrpc_skb_freed);
+ rxrpc_put_txbuf(txb, rxrpc_txbuf_put_send_aborted);
_leave(" = %d", call->error);
return call->error;
diff --git a/net/rxrpc/txbuf.c b/net/rxrpc/txbuf.c
index 45a7b48a5e10..96bfee89927b 100644
--- a/net/rxrpc/txbuf.c
+++ b/net/rxrpc/txbuf.c
@@ -99,3 +99,37 @@ void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what)
call_rcu(&txb->rcu, rxrpc_free_txbuf);
}
}
+
+/*
+ * Shrink the transmit buffer.
+ */
+void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *call)
+{
+ struct rxrpc_txbuf *txb;
+ rxrpc_seq_t hard_ack = smp_load_acquire(&call->acks_hard_ack);
+
+ _enter("%x/%x/%x", call->tx_bottom, call->acks_hard_ack, call->tx_top);
+
+ for (;;) {
+ spin_lock(&call->tx_lock);
+ txb = list_first_entry_or_null(&call->tx_buffer,
+ struct rxrpc_txbuf, call_link);
+ if (!txb)
+ break;
+ hard_ack = smp_load_acquire(&call->acks_hard_ack);
+ if (before(hard_ack, txb->seq))
+ break;
+
+ ASSERTCMP(txb->seq, ==, call->tx_bottom + 1);
+ call->tx_bottom++;
+ list_del_rcu(&txb->call_link);
+
+ trace_rxrpc_txqueue(call, rxrpc_txqueue_dequeue);
+
+ spin_unlock(&call->tx_lock);
+
+ rxrpc_put_txbuf(txb, rxrpc_txbuf_put_rotated);
+ }
+
+ spin_unlock(&call->tx_lock);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-05 19:17:16 +0000