@@ -26,7 +26,6 @@
#define rxrpc_skb_traces \
EM(rxrpc_skb_eaten_by_unshare, "ETN unshare ") \
EM(rxrpc_skb_eaten_by_unshare_nomem, "ETN unshar-nm") \
- EM(rxrpc_skb_get_ack, "GET ack ") \
EM(rxrpc_skb_get_conn_work, "GET conn-work") \
EM(rxrpc_skb_get_to_recvmsg, "GET to-recv ") \
EM(rxrpc_skb_get_to_recvmsg_oos, "GET to-recv-o") \
@@ -34,7 +33,6 @@
EM(rxrpc_skb_new_error_report, "NEW error-rpt") \
EM(rxrpc_skb_new_jumbo_subpacket, "NEW jumbo-sub") \
EM(rxrpc_skb_new_unshared, "NEW unshared ") \
- EM(rxrpc_skb_put_ack, "PUT ack ") \
EM(rxrpc_skb_put_conn_work, "PUT conn-work") \
EM(rxrpc_skb_put_error_report, "PUT error-rep") \
EM(rxrpc_skb_put_input, "PUT input ") \
@@ -44,7 +42,6 @@
EM(rxrpc_skb_put_rotate, "PUT rotate ") \
EM(rxrpc_skb_put_unknown, "PUT unknown ") \
EM(rxrpc_skb_see_conn_work, "SEE conn-work") \
- EM(rxrpc_skb_see_local_work, "SEE locl-work") \
EM(rxrpc_skb_see_recvmsg, "SEE recvmsg ") \
EM(rxrpc_skb_see_reject, "SEE reject ") \
EM(rxrpc_skb_see_rotate, "SEE rotate ") \
@@ -56,18 +53,13 @@
EM(rxrpc_local_get_for_use, "GET for-use ") \
EM(rxrpc_local_get_peer, "GET peer ") \
EM(rxrpc_local_get_prealloc_conn, "GET conn-pre") \
- EM(rxrpc_local_get_queue, "GET queue ") \
EM(rxrpc_local_new, "NEW ") \
- EM(rxrpc_local_processing, "PROCESSING ") \
- EM(rxrpc_local_put_already_queued, "PUT alreadyq") \
EM(rxrpc_local_put_bind, "PUT bind ") \
EM(rxrpc_local_put_for_use, "PUT for-use ") \
EM(rxrpc_local_put_kill_conn, "PUT conn-kil") \
EM(rxrpc_local_put_peer, "PUT peer ") \
EM(rxrpc_local_put_prealloc_conn, "PUT conn-pre") \
EM(rxrpc_local_put_release_sock, "PUT rel-sock") \
- EM(rxrpc_local_put_queue, "PUT queue ") \
- EM(rxrpc_local_queued, "QUEUED ") \
EM(rxrpc_local_see_tx_ack, "SEE tx-ack ") \
EM(rxrpc_local_stop, "STOP ") \
EM(rxrpc_local_stopped, "STOPPED ") \
@@ -75,11 +67,9 @@
EM(rxrpc_local_unuse_conn_work, "UNU conn-wrk") \
EM(rxrpc_local_unuse_peer_keepalive, "UNU peer-kpa") \
EM(rxrpc_local_unuse_release_sock, "UNU rel-sock") \
- EM(rxrpc_local_unuse_work, "UNU work ") \
EM(rxrpc_local_use_conn_work, "USE conn-wrk") \
EM(rxrpc_local_use_lookup, "USE lookup ") \
- EM(rxrpc_local_use_peer_keepalive, "USE peer-kpa") \
- E_(rxrpc_local_use_work, "USE work ")
+ E_(rxrpc_local_use_peer_keepalive, "USE peer-kpa")
#define rxrpc_peer_traces \
EM(rxrpc_peer_free, "FREE ") \
@@ -161,14 +151,11 @@
EM(rxrpc_call_get_poke, "GET poke ") \
EM(rxrpc_call_get_recvmsg, "GET recvmsg ") \
EM(rxrpc_call_get_release_sock, "GET rel-sock") \
- EM(rxrpc_call_get_retrans, "GET retrans ") \
EM(rxrpc_call_get_sendmsg, "GET sendmsg ") \
EM(rxrpc_call_get_send_ack, "GET send-ack") \
- EM(rxrpc_call_get_timer, "GET timer ") \
EM(rxrpc_call_get_userid, "GET user-id ") \
EM(rxrpc_call_new_client, "NEW client ") \
EM(rxrpc_call_new_prealloc_service, "NEW prealloc") \
- EM(rxrpc_call_put_already_queued, "PUT alreadyq") \
EM(rxrpc_call_put_discard_prealloc, "PUT disc-pre") \
EM(rxrpc_call_put_input, "PUT input ") \
EM(rxrpc_call_put_kernel, "PUT kernel ") \
@@ -178,16 +165,8 @@
EM(rxrpc_call_put_release_sock_tba, "PUT rls-sk-a") \
EM(rxrpc_call_put_send_ack, "PUT send-ack") \
EM(rxrpc_call_put_sendmsg, "PUT sendmsg ") \
- EM(rxrpc_call_put_timer, "PUT timer ") \
- EM(rxrpc_call_put_timer_already, "PUT timer-al") \
EM(rxrpc_call_put_unnotify, "PUT unnotify") \
EM(rxrpc_call_put_userid_exists, "PUT u-exists") \
- EM(rxrpc_call_put_work, "PUT work ") \
- EM(rxrpc_call_queue_abort, "QUE abort ") \
- EM(rxrpc_call_queue_requeue, "QUE requeue ") \
- EM(rxrpc_call_queue_resend, "QUE resend ") \
- EM(rxrpc_call_queue_timer, "QUE timer ") \
- EM(rxrpc_call_queue_tx_data, "QUE tx-data ") \
EM(rxrpc_call_see_accept, "SEE accept ") \
EM(rxrpc_call_see_activate_client, "SEE act-clnt") \
EM(rxrpc_call_see_connect_failed, "SEE con-fail") \
@@ -285,6 +264,7 @@
EM(rxrpc_propose_ack_respond_to_ping, "Rsp2Png") \
EM(rxrpc_propose_ack_retry_tx, "RetryTx") \
EM(rxrpc_propose_ack_rotate_rx, "RxAck ") \
+ EM(rxrpc_propose_ack_rx_idle, "RxIdle ") \
E_(rxrpc_propose_ack_terminal_ack, "ClTerm ")
#define rxrpc_congest_modes \
@@ -1551,23 +1531,30 @@ TRACE_EVENT(rxrpc_connect_call,
);
TRACE_EVENT(rxrpc_resend,
- TP_PROTO(struct rxrpc_call *call),
+ TP_PROTO(struct rxrpc_call *call, struct sk_buff *ack),
- TP_ARGS(call),
+ TP_ARGS(call, ack),
TP_STRUCT__entry(
__field(unsigned int, call )
__field(rxrpc_seq_t, seq )
+ __field(rxrpc_seq_t, transmitted )
+ __field(rxrpc_serial_t, ack_serial )
),
TP_fast_assign(
+ struct rxrpc_skb_priv *sp = ack ? rxrpc_skb(ack) : NULL;
__entry->call = call->debug_id;
__entry->seq = call->acks_hard_ack;
+ __entry->transmitted = call->tx_transmitted;
+ __entry->ack_serial = sp ? sp->hdr.serial : 0;
),
- TP_printk("c=%08x q=%x",
+ TP_printk("c=%08x r=%x q=%x tq=%x",
__entry->call,
- __entry->seq)
+ __entry->ack_serial,
+ __entry->seq,
+ __entry->transmitted)
);
TRACE_EVENT(rxrpc_rx_icmp,
@@ -283,14 +283,11 @@ struct rxrpc_local {
struct rxrpc_net *rxnet; /* The network ns in which this resides */
struct hlist_node link;
struct socket *socket; /* my UDP socket */
- struct work_struct processor;
struct task_struct *io_thread;
struct list_head ack_tx_queue; /* List of ACKs that need sending */
spinlock_t ack_tx_lock; /* ACK list lock */
struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
- struct sk_buff_head reject_queue; /* packets awaiting rejection */
- struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
struct sk_buff_head rx_queue; /* Received packets */
struct list_head call_attend_q; /* Calls requiring immediate attention */
struct rb_root client_bundles; /* Client connection bundles by socket params */
@@ -521,22 +518,18 @@ enum rxrpc_call_flag {
RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
- RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
RXRPC_CALL_KERNEL, /* The call was made by the kernel */
RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
- RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */
- RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */
+ RXRPC_CALL_RX_IS_IDLE, /* Reception is idle - send an ACK */
};
/*
* Events that can be raised on a call.
*/
enum rxrpc_call_event {
- RXRPC_CALL_EV_ABORT, /* need to generate abort */
- RXRPC_CALL_EV_RESEND, /* Tx resend required */
- RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
+ RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */
};
/*
@@ -604,7 +597,6 @@ struct rxrpc_call {
u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
struct timer_list timer; /* Combined event timer */
- struct work_struct processor; /* Event processor */
rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
struct list_head link; /* link in master call list */
struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
@@ -697,11 +689,7 @@ struct rxrpc_call {
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 */
rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
- struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */
- spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */
};
/*
@@ -762,7 +750,7 @@ struct rxrpc_txbuf {
struct rcu_head rcu;
struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */
struct list_head tx_link; /* Link in live Enc queue or Tx queue */
- struct rxrpc_call *call; /* Call to which belongs */
+ struct rxrpc_call *call;
ktime_t last_sent; /* Time at which last transmitted */
refcount_t ref;
rxrpc_seq_t seq; /* Sequence number of this packet */
@@ -829,7 +817,7 @@ void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_
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_resend(struct rxrpc_call *call, struct sk_buff *ack_skb);
void rxrpc_reduce_call_timer(struct rxrpc_call *call,
unsigned long expire_at,
@@ -837,6 +825,7 @@ void rxrpc_reduce_call_timer(struct rxrpc_call *call,
enum rxrpc_timer_trace why);
void rxrpc_delete_call_timer(struct rxrpc_call *call);
+void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb);
/*
* call_object.c
@@ -857,8 +846,6 @@ void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
struct sk_buff *);
void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
-bool __rxrpc_queue_call(struct rxrpc_call *, enum rxrpc_call_trace);
-bool rxrpc_queue_call(struct rxrpc_call *, enum rxrpc_call_trace);
void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
bool rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
@@ -902,6 +889,7 @@ void rxrpc_clean_up_local_conns(struct rxrpc_local *);
*/
void rxrpc_process_connection(struct work_struct *);
void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
+int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb);
/*
* conn_object.c
@@ -967,9 +955,8 @@ void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
/*
* input.c
*/
-void rxrpc_input_call_event(struct rxrpc_call *, struct sk_buff *);
-void rxrpc_input_implicit_end_call(struct rxrpc_sock *, struct rxrpc_connection *,
- struct rxrpc_call *);
+void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
+void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *);
/*
* io_thread.c
@@ -999,7 +986,9 @@ int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
/*
* local_event.c
*/
-extern void rxrpc_process_local_events(struct rxrpc_local *);
+void rxrpc_send_version_request(struct rxrpc_local *local,
+ struct rxrpc_host_header *hdr,
+ struct sk_buff *skb);
/*
* local_object.c
@@ -1010,7 +999,6 @@ struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local
void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
-void rxrpc_queue_local(struct rxrpc_local *);
void rxrpc_destroy_local(struct rxrpc_local *local);
void rxrpc_destroy_all_locals(struct rxrpc_net *);
@@ -1074,7 +1062,7 @@ 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 rxrpc_txbuf *);
-void rxrpc_reject_packets(struct rxrpc_local *);
+void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb);
void rxrpc_send_keepalive(struct rxrpc_peer *);
void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
@@ -1183,7 +1171,6 @@ int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
* skbuff.c
*/
void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
-void rxrpc_packet_destructor(struct sk_buff *);
void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
@@ -100,6 +100,7 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
return -ENOMEM;
call->flags |= (1 << RXRPC_CALL_IS_SERVICE);
call->state = RXRPC_CALL_SERVER_PREALLOC;
+ __set_bit(RXRPC_CALL_EV_INITIAL_PING, &call->events);
trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
user_call_ID, rxrpc_call_new_prealloc_service);
@@ -234,21 +235,6 @@ void rxrpc_discard_prealloc(struct rxrpc_sock *rx)
kfree(b);
}
-/*
- * Ping the other end to fill our RTT cache and to retrieve the rwind
- * and MTU parameters.
- */
-static void rxrpc_send_ping(struct rxrpc_call *call, struct sk_buff *skb)
-{
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
- ktime_t now = skb->tstamp;
-
- if (call->peer->rtt_count < 3 ||
- ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000), now))
- rxrpc_send_ACK(call, RXRPC_ACK_PING, sp->hdr.serial,
- rxrpc_propose_ack_ping_for_params);
-}
-
/*
* Allocate a new incoming call from the prealloc pool, along with a connection
* and a peer as necessary.
@@ -393,35 +379,14 @@ struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local,
rx->notify_new_call(&rx->sk, call, call->user_call_ID);
spin_lock(&conn->state_lock);
- switch (conn->state) {
- case RXRPC_CONN_SERVICE_UNSECURED:
+ if (conn->state == RXRPC_CONN_SERVICE_UNSECURED) {
conn->state = RXRPC_CONN_SERVICE_CHALLENGING;
set_bit(RXRPC_CONN_EV_CHALLENGE, &call->conn->events);
rxrpc_queue_conn(call->conn, rxrpc_conn_queue_challenge);
- break;
-
- case RXRPC_CONN_SERVICE:
- write_lock(&call->state_lock);
- if (call->state < RXRPC_CALL_COMPLETE)
- call->state = RXRPC_CALL_SERVER_RECV_REQUEST;
- write_unlock(&call->state_lock);
- break;
-
- case RXRPC_CONN_REMOTELY_ABORTED:
- rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
- conn->abort_code, conn->error);
- break;
- case RXRPC_CONN_LOCALLY_ABORTED:
- rxrpc_abort_call("CON", call, sp->hdr.seq,
- conn->abort_code, conn->error);
- break;
- default:
- BUG();
}
spin_unlock(&conn->state_lock);
- spin_unlock(&rx->incoming_lock);
- rxrpc_send_ping(call, skb);
+ spin_unlock(&rx->incoming_lock);
/* We have to discard the prealloc queue's ref here and rely on a
* combination of the RCU read lock and refs held either by the socket
@@ -74,11 +74,6 @@ void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason,
if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags))
return;
- if (ack_reason == RXRPC_ACK_DELAY &&
- test_and_set_bit(RXRPC_CALL_DELAY_ACK_PENDING, &call->flags)) {
- trace_rxrpc_drop_ack(call, why, ack_reason, serial, false);
- return;
- }
rxrpc_inc_stat(call->rxnet, stat_tx_acks[ack_reason]);
@@ -111,12 +106,7 @@ void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason,
spin_unlock(&local->ack_tx_lock);
trace_rxrpc_send_ack(call, why, ack_reason, serial);
- if (!rcu_read_lock_held()) {
- rxrpc_transmit_ack_packets(call->peer->local);
- } else {
- rxrpc_get_local(local, rxrpc_local_get_queue);
- rxrpc_queue_local(local);
- }
+ rxrpc_wake_up_io_thread(local);
}
/*
@@ -130,11 +120,10 @@ static void rxrpc_congestion_timeout(struct rxrpc_call *call)
/*
* Perform retransmission of NAK'd and unack'd packets.
*/
-static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
+void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb)
{
struct rxrpc_ackpacket *ack = NULL;
struct rxrpc_txbuf *txb;
- struct sk_buff *ack_skb = NULL;
unsigned long resend_at;
rxrpc_seq_t transmitted = READ_ONCE(call->tx_transmitted);
ktime_t now, max_age, oldest, ack_ts;
@@ -148,32 +137,21 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
max_age = ktime_sub_us(now, jiffies_to_usecs(call->peer->rto_j));
oldest = now;
- /* See if there's an ACK saved with a soft-ACK table in it. */
- if (call->acks_soft_tbl) {
- spin_lock(&call->acks_ack_lock);
- ack_skb = call->acks_soft_tbl;
- if (ack_skb) {
- rxrpc_get_skb(ack_skb, rxrpc_skb_get_ack);
- ack = (void *)ack_skb->data + sizeof(struct rxrpc_wire_header);
- }
- spin_unlock(&call->acks_ack_lock);
- }
-
if (list_empty(&call->tx_buffer))
goto no_resend;
- spin_lock(&call->tx_lock);
-
if (list_empty(&call->tx_buffer))
goto no_further_resend;
- trace_rxrpc_resend(call);
+ trace_rxrpc_resend(call, ack_skb);
txb = list_first_entry(&call->tx_buffer, struct rxrpc_txbuf, call_link);
/* Scan the soft ACK table without dropping the lock and resend any
* explicitly NAK'd packets.
*/
- if (ack) {
+ if (ack_skb) {
+ ack = (void *)ack_skb->data + sizeof(struct rxrpc_wire_header);
+
for (i = 0; i < ack->nAcks; i++) {
rxrpc_seq_t seq;
@@ -197,8 +175,6 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
rxrpc_see_txbuf(txb, rxrpc_txbuf_see_unacked);
if (list_empty(&txb->tx_link)) {
- rxrpc_get_txbuf(txb, rxrpc_txbuf_get_retrans);
- rxrpc_get_call(call, rxrpc_call_get_retrans);
list_add_tail(&txb->tx_link, &retrans_queue);
set_bit(RXRPC_TXBUF_RESENT, &txb->flags);
}
@@ -242,7 +218,6 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
do_resend:
unacked = true;
if (list_empty(&txb->tx_link)) {
- rxrpc_get_txbuf(txb, rxrpc_txbuf_get_retrans);
list_add_tail(&txb->tx_link, &retrans_queue);
set_bit(RXRPC_TXBUF_RESENT, &txb->flags);
rxrpc_inc_stat(call->rxnet, stat_tx_data_retrans);
@@ -250,10 +225,7 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
}
no_further_resend:
- spin_unlock(&call->tx_lock);
no_resend:
- rxrpc_free_skb(ack_skb, rxrpc_skb_put_ack);
-
resend_at = nsecs_to_jiffies(ktime_to_ns(ktime_sub(now, oldest)));
resend_at += jiffies + rxrpc_get_rto_backoff(call->peer,
!list_empty(&retrans_queue));
@@ -267,7 +239,7 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
* retransmitting data.
*/
if (list_empty(&retrans_queue)) {
- rxrpc_reduce_call_timer(call, resend_at, now_j,
+ rxrpc_reduce_call_timer(call, resend_at, jiffies,
rxrpc_timer_set_for_resend);
ack_ts = ktime_sub(now, call->acks_latest_ts);
if (ktime_to_us(ack_ts) < (call->peer->srtt_us >> 3))
@@ -277,15 +249,11 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
goto out;
}
+ /* Retransmit the queue */
while ((txb = list_first_entry_or_null(&retrans_queue,
struct rxrpc_txbuf, tx_link))) {
list_del_init(&txb->tx_link);
- rxrpc_send_data_packet(call, txb);
- rxrpc_put_txbuf(txb, rxrpc_txbuf_put_trans);
-
- trace_rxrpc_retransmit(call, txb->seq,
- ktime_to_ns(ktime_sub(txb->last_sent,
- max_age)));
+ rxrpc_transmit_one(call, txb);
}
out:
@@ -351,16 +319,27 @@ static void rxrpc_transmit_some_data(struct rxrpc_call *call)
}
}
+/*
+ * Ping the other end to fill our RTT cache and to retrieve the rwind
+ * and MTU parameters.
+ */
+static void rxrpc_send_initial_ping(struct rxrpc_call *call)
+{
+ if (call->peer->rtt_count < 3 ||
+ ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000),
+ ktime_get_real()))
+ rxrpc_send_ACK(call, RXRPC_ACK_PING, 0,
+ rxrpc_propose_ack_ping_for_params);
+}
+
/*
* Handle retransmission and deferred ACK/abort generation.
*/
-void rxrpc_process_call(struct work_struct *work)
+void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb)
{
- struct rxrpc_call *call =
- container_of(work, struct rxrpc_call, processor);
unsigned long now, next, t;
- unsigned int iterations = 0;
rxrpc_serial_t ackr_serial;
+ bool resend = false, expired = false;
rxrpc_see_call(call, rxrpc_call_see_input);
@@ -368,47 +347,31 @@ void rxrpc_process_call(struct work_struct *work)
_enter("{%d,%s,%lx}",
call->debug_id, rxrpc_call_states[call->state], call->events);
-recheck_state:
- if (call->acks_hard_ack != call->tx_bottom)
- rxrpc_shrink_call_tx_buffer(call);
-
- /* Limit the number of times we do this before returning to the manager */
- if (rxrpc_tx_window_space(call) == 0 ||
- list_empty(&call->tx_sendmsg)) {
- iterations++;
- if (iterations > 5)
- goto requeue;
- }
-
- if (test_and_clear_bit(RXRPC_CALL_EV_ABORT, &call->events)) {
- rxrpc_send_abort_packet(call);
- goto recheck_state;
- }
+ if (call->state == RXRPC_CALL_COMPLETE)
+ goto out;
- if (call->state == RXRPC_CALL_COMPLETE) {
- rxrpc_delete_call_timer(call);
- goto out_put;
- }
+ if (skb && skb->mark == RXRPC_SKB_MARK_ERROR)
+ goto out;
- /* Work out if any timeouts tripped */
+ /* If we see our async-event poke, check for timeout trippage. */
now = jiffies;
t = READ_ONCE(call->expect_rx_by);
if (time_after_eq(now, t)) {
trace_rxrpc_timer(call, rxrpc_timer_exp_normal, now);
- set_bit(RXRPC_CALL_EV_EXPIRED, &call->events);
+ expired = true;
}
t = READ_ONCE(call->expect_req_by);
if (call->state == RXRPC_CALL_SERVER_RECV_REQUEST &&
time_after_eq(now, t)) {
trace_rxrpc_timer(call, rxrpc_timer_exp_idle, now);
- set_bit(RXRPC_CALL_EV_EXPIRED, &call->events);
+ expired = true;
}
t = READ_ONCE(call->expect_term_by);
if (time_after_eq(now, t)) {
trace_rxrpc_timer(call, rxrpc_timer_exp_hard, now);
- set_bit(RXRPC_CALL_EV_EXPIRED, &call->events);
+ expired = true;
}
t = READ_ONCE(call->delay_ack_at);
@@ -447,13 +410,19 @@ void rxrpc_process_call(struct work_struct *work)
if (time_after_eq(now, t)) {
trace_rxrpc_timer(call, rxrpc_timer_exp_resend, now);
cmpxchg(&call->resend_at, t, now + MAX_JIFFY_OFFSET);
- set_bit(RXRPC_CALL_EV_RESEND, &call->events);
+ resend = true;
}
+ if (skb)
+ rxrpc_input_call_packet(call, skb);
+
rxrpc_transmit_some_data(call);
+ if (test_and_clear_bit(RXRPC_CALL_EV_INITIAL_PING, &call->events))
+ rxrpc_send_initial_ping(call);
+
/* Process events */
- if (test_and_clear_bit(RXRPC_CALL_EV_EXPIRED, &call->events)) {
+ if (expired) {
if (test_bit(RXRPC_CALL_RX_HEARD, &call->flags) &&
(int)call->conn->hi_serial - (int)call->rx_serial > 0) {
trace_rxrpc_call_reset(call);
@@ -461,52 +430,50 @@ void rxrpc_process_call(struct work_struct *work)
} else {
rxrpc_abort_call("EXP", call, 0, RX_CALL_TIMEOUT, -ETIME);
}
- set_bit(RXRPC_CALL_EV_ABORT, &call->events);
- goto recheck_state;
+ rxrpc_send_abort_packet(call);
+ goto out;
}
- if (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events)) {
- call->acks_lost_top = call->tx_top;
+ if (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events))
rxrpc_send_ACK(call, RXRPC_ACK_PING, 0,
rxrpc_propose_ack_ping_for_lost_ack);
- }
- if (test_and_clear_bit(RXRPC_CALL_EV_RESEND, &call->events) &&
- call->state != RXRPC_CALL_CLIENT_RECV_REPLY) {
- rxrpc_resend(call, now);
- goto recheck_state;
- }
+ if (resend && call->state != RXRPC_CALL_CLIENT_RECV_REPLY)
+ rxrpc_resend(call, NULL);
+
+ if (test_and_clear_bit(RXRPC_CALL_RX_IS_IDLE, &call->flags))
+ rxrpc_send_ACK(call, RXRPC_ACK_IDLE, 0,
+ rxrpc_propose_ack_rx_idle);
+
+ if (atomic_read(&call->ackr_nr_unacked) > 2)
+ rxrpc_send_ACK(call, RXRPC_ACK_IDLE, 0,
+ rxrpc_propose_ack_input_data);
/* Make sure the timer is restarted */
- next = call->expect_rx_by;
+ if (call->state != RXRPC_CALL_COMPLETE) {
+ next = call->expect_rx_by;
#define set(T) { t = READ_ONCE(T); if (time_before(t, next)) next = t; }
- set(call->expect_req_by);
- set(call->expect_term_by);
- set(call->delay_ack_at);
- set(call->ack_lost_at);
- set(call->resend_at);
- set(call->keepalive_at);
- set(call->ping_at);
-
- now = jiffies;
- if (time_after_eq(now, next))
- goto recheck_state;
+ set(call->expect_req_by);
+ set(call->expect_term_by);
+ set(call->delay_ack_at);
+ set(call->ack_lost_at);
+ set(call->resend_at);
+ set(call->keepalive_at);
+ set(call->ping_at);
- rxrpc_reduce_call_timer(call, next, now, rxrpc_timer_restart);
+ now = jiffies;
+ if (time_after_eq(now, next))
+ rxrpc_poke_call(call, rxrpc_call_poke_timer_now);
- /* other events may have been raised since we started checking */
- if (call->events && call->state < RXRPC_CALL_COMPLETE)
- goto requeue;
+ rxrpc_reduce_call_timer(call, next, now, rxrpc_timer_restart);
+ }
-out_put:
- rxrpc_put_call(call, rxrpc_call_put_work);
out:
+ if (call->state == RXRPC_CALL_COMPLETE)
+ rxrpc_delete_call_timer(call);
+ if (call->acks_hard_ack != call->tx_bottom)
+ rxrpc_shrink_call_tx_buffer(call);
_leave("");
- return;
-
-requeue:
- __rxrpc_queue_call(call, rxrpc_call_queue_requeue);
- goto out;
}
@@ -76,9 +76,7 @@ static void rxrpc_call_timer_expired(struct timer_list *t)
if (call->state < RXRPC_CALL_COMPLETE) {
trace_rxrpc_timer_expired(call, jiffies);
- __rxrpc_queue_call(call, rxrpc_call_queue_timer);
- } else {
- rxrpc_put_call(call, rxrpc_call_put_already_queued);
+ rxrpc_poke_call(call, rxrpc_call_poke_timer);
}
}
@@ -87,17 +85,13 @@ void rxrpc_reduce_call_timer(struct rxrpc_call *call,
unsigned long now,
enum rxrpc_timer_trace why)
{
- if (rxrpc_try_get_call(call, rxrpc_call_get_timer)) {
- trace_rxrpc_timer(call, why, now);
- if (timer_reduce(&call->timer, expire_at))
- rxrpc_put_call(call, rxrpc_call_put_timer_already);
- }
+ trace_rxrpc_timer(call, why, now);
+ timer_reduce(&call->timer, expire_at);
}
void rxrpc_delete_call_timer(struct rxrpc_call *call)
{
- if (del_timer_sync(&call->timer))
- rxrpc_put_call(call, rxrpc_call_put_timer);
+ del_timer_sync(&call->timer);
}
static struct lock_class_key rxrpc_call_user_mutex_lock_class_key;
@@ -162,7 +156,6 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
&rxrpc_call_user_mutex_lock_class_key);
timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
- INIT_WORK(&call->processor, &rxrpc_process_call);
INIT_LIST_HEAD(&call->link);
INIT_LIST_HEAD(&call->chan_wait_link);
INIT_LIST_HEAD(&call->accept_link);
@@ -176,7 +169,6 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
init_waitqueue_head(&call->waitq);
spin_lock_init(&call->notify_lock);
spin_lock_init(&call->tx_lock);
- spin_lock_init(&call->acks_ack_lock);
rwlock_init(&call->state_lock);
refcount_set(&call->ref, 1);
call->debug_id = debug_id;
@@ -242,6 +234,7 @@ static void rxrpc_start_call_timer(struct rxrpc_call *call)
call->ack_lost_at = j;
call->resend_at = j;
call->ping_at = j;
+ call->keepalive_at = j;
call->expect_rx_by = j;
call->expect_req_by = j;
call->expect_term_by = j;
@@ -427,6 +420,29 @@ void rxrpc_incoming_call(struct rxrpc_sock *rx,
call->state = RXRPC_CALL_SERVER_SECURING;
call->cong_tstamp = skb->tstamp;
+ spin_lock(&conn->state_lock);
+
+ switch (conn->state) {
+ case RXRPC_CONN_SERVICE_UNSECURED:
+ case RXRPC_CONN_SERVICE_CHALLENGING:
+ call->state = RXRPC_CALL_SERVER_SECURING;
+ break;
+ case RXRPC_CONN_SERVICE:
+ call->state = RXRPC_CALL_SERVER_RECV_REQUEST;
+ break;
+
+ case RXRPC_CONN_REMOTELY_ABORTED:
+ __rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
+ conn->abort_code, conn->error);
+ break;
+ case RXRPC_CONN_LOCALLY_ABORTED:
+ __rxrpc_abort_call("CON", call, 1,
+ conn->abort_code, conn->error);
+ break;
+ default:
+ BUG();
+ }
+
/* Set the channel for this call. We don't get channel_lock as we're
* only defending against the data_ready handler (which we're called
* from) and the RESPONSE packet parser (which is only really
@@ -437,6 +453,7 @@ void rxrpc_incoming_call(struct rxrpc_sock *rx,
conn->channels[chan].call_counter = call->call_id;
conn->channels[chan].call_id = call->call_id;
rcu_assign_pointer(conn->channels[chan].call, call);
+ spin_unlock(&conn->state_lock);
spin_lock(&conn->peer->lock);
hlist_add_head(&call->error_link, &conn->peer->error_targets);
@@ -446,37 +463,6 @@ void rxrpc_incoming_call(struct rxrpc_sock *rx,
_leave("");
}
-/*
- * Queue a call's work processor, getting a ref to pass to the work queue.
- */
-bool rxrpc_queue_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
-{
- int n;
-
- if (!__refcount_inc_not_zero(&call->ref, &n))
- return false;
- if (rxrpc_queue_work(&call->processor))
- trace_rxrpc_call(call->debug_id, n + 1, 0, why);
- else
- rxrpc_put_call(call, rxrpc_call_put_already_queued);
- return true;
-}
-
-/*
- * Queue a call's work processor, passing the callers ref to the work queue.
- */
-bool __rxrpc_queue_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
-{
- int n = refcount_read(&call->ref);
-
- ASSERTCMP(n, >=, 1);
- if (rxrpc_queue_work(&call->processor))
- trace_rxrpc_call(call->debug_id, n, 0, why);
- else
- rxrpc_put_call(call, rxrpc_call_put_already_queued);
- return true;
-}
-
/*
* Note the re-emergence of a call.
*/
@@ -674,7 +660,6 @@ void rxrpc_cleanup_call(struct rxrpc_call *call)
rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned);
}
rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned);
- rxrpc_free_skb(call->acks_soft_tbl, rxrpc_skb_put_ack);
rxrpc_put_connection(call->conn, rxrpc_conn_put_call);
rxrpc_put_peer(call->peer, rxrpc_peer_put_call);
@@ -483,3 +483,66 @@ void rxrpc_process_connection(struct work_struct *work)
_leave("");
return;
}
+
+/*
+ * post connection-level events to the connection
+ * - this includes challenges, responses, some aborts and call terminal packet
+ * retransmission.
+ */
+static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn,
+ struct sk_buff *skb)
+{
+ _enter("%p,%p", conn, skb);
+
+ skb_queue_tail(&conn->rx_queue, skb);
+ rxrpc_queue_conn(conn, rxrpc_conn_queue_rx_work);
+}
+
+/*
+ * Input a connection-level packet.
+ */
+int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb)
+{
+ struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
+
+ if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
+ _leave(" = -ECONNABORTED [%u]", conn->state);
+ return -ECONNABORTED;
+ }
+
+ _enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial);
+
+ switch (sp->hdr.type) {
+ case RXRPC_PACKET_TYPE_DATA:
+ case RXRPC_PACKET_TYPE_ACK:
+ rxrpc_conn_retransmit_call(conn, skb,
+ sp->hdr.cid & RXRPC_CHANNELMASK);
+ rxrpc_free_skb(skb, rxrpc_skb_put_input);
+ return 0;
+
+ case RXRPC_PACKET_TYPE_BUSY:
+ /* Just ignore BUSY packets for now. */
+ rxrpc_free_skb(skb, rxrpc_skb_put_input);
+ return 0;
+
+ case RXRPC_PACKET_TYPE_ABORT:
+ conn->error = -ECONNABORTED;
+ conn->abort_code = skb->priority;
+ conn->state = RXRPC_CONN_REMOTELY_ABORTED;
+ set_bit(RXRPC_CONN_DONT_REUSE, &conn->flags);
+ rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED, sp->hdr.serial);
+ rxrpc_free_skb(skb, rxrpc_skb_put_input);
+ return -ECONNABORTED;
+
+ case RXRPC_PACKET_TYPE_CHALLENGE:
+ case RXRPC_PACKET_TYPE_RESPONSE:
+ rxrpc_post_packet_to_conn(conn, skb);
+ return 0;
+
+ default:
+ trace_rxrpc_rx_eproto(NULL, sp->hdr.serial,
+ tracepoint_string("bad_conn_pkt"));
+ rxrpc_free_skb(skb, rxrpc_skb_put_input);
+ return -EPROTO;
+ }
+}
@@ -12,10 +12,8 @@
static void rxrpc_proto_abort(const char *why,
struct rxrpc_call *call, rxrpc_seq_t seq)
{
- if (rxrpc_abort_call(why, call, seq, RX_PROTOCOL_ERROR, -EBADMSG)) {
- set_bit(RXRPC_CALL_EV_ABORT, &call->events);
- rxrpc_queue_call(call, rxrpc_call_queue_abort);
- }
+ if (rxrpc_abort_call(why, call, seq, RX_PROTOCOL_ERROR, -EBADMSG))
+ rxrpc_send_abort_packet(call);
}
/*
@@ -174,8 +172,8 @@ static void rxrpc_congestion_management(struct rxrpc_call *call,
call->cong_cwnd = cwnd;
call->cong_cumul_acks = cumulative_acks;
trace_rxrpc_congest(call, summary, acked_serial, change);
- if (resend && !test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
- rxrpc_queue_call(call, rxrpc_call_queue_resend);
+ if (resend)
+ rxrpc_resend(call, skb);
return;
packet_loss_detected:
@@ -397,6 +395,8 @@ 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
+ atomic_inc_return(&call->ackr_nr_unacked);
window++;
if (after(window, wtop))
@@ -469,14 +469,6 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb)
}
send_ack:
- if (ack_reason < 0 &&
- atomic_inc_return(&call->ackr_nr_unacked) > 2 &&
- test_and_set_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags)) {
- ack_reason = RXRPC_ACK_IDLE;
- } else if (ack_reason >= 0) {
- set_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags);
- }
-
if (ack_reason >= 0)
rxrpc_send_ACK(call, ack_reason, serial,
rxrpc_propose_ack_input_data);
@@ -508,7 +500,7 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb
&jhdr, sizeof(jhdr)) < 0)
goto protocol_error;
- jskb = skb_clone(skb, GFP_ATOMIC);
+ jskb = skb_clone(skb, GFP_NOFS);
if (!jskb) {
kdebug("couldn't clone");
return false;
@@ -552,16 +544,14 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb)
skb->len, seq0);
state = READ_ONCE(call->state);
- if (state >= RXRPC_CALL_COMPLETE) {
- rxrpc_free_skb(skb, rxrpc_skb_put_input);
- return;
- }
+ if (state >= RXRPC_CALL_COMPLETE)
+ goto out;
/* Unshare the packet so that it can be modified for in-place
* decryption.
*/
if (sp->hdr.securityIndex != 0) {
- struct sk_buff *nskb = skb_unshare(skb, GFP_ATOMIC);
+ struct sk_buff *nskb = skb_unshare(skb, GFP_NOFS);
if (!nskb) {
rxrpc_eaten_skb(skb, rxrpc_skb_eaten_by_unshare_nomem);
return;
@@ -594,17 +584,18 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb)
if ((state == RXRPC_CALL_CLIENT_SEND_REQUEST ||
state == RXRPC_CALL_CLIENT_AWAIT_REPLY) &&
!rxrpc_receiving_reply(call))
- goto out;
+ goto out_notify;
if (!rxrpc_input_split_jumbo(call, skb)) {
rxrpc_proto_abort("VLD", call, sp->hdr.seq);
- goto out;
+ goto out_notify;
}
skb = NULL;
-out:
+out_notify:
trace_rxrpc_notify_socket(call->debug_id, serial);
rxrpc_notify_socket(call);
+out:
rxrpc_free_skb(skb, rxrpc_skb_put_input);
_leave(" [queued]");
}
@@ -663,32 +654,6 @@ static void rxrpc_complete_rtt_probe(struct rxrpc_call *call,
trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_lost, 9, 0, acked_serial, 0, 0);
}
-/*
- * Process the response to a ping that we sent to find out if we lost an ACK.
- *
- * If we got back a ping response that indicates a lower tx_top than what we
- * had at the time of the ping transmission, we adjudge all the DATA packets
- * sent between the response tx_top and the ping-time tx_top to have been lost.
- */
-static void rxrpc_input_check_for_lost_ack(struct rxrpc_call *call)
-{
- if (after(call->acks_lost_top, call->acks_prev_seq) &&
- !test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
- rxrpc_queue_call(call, rxrpc_call_queue_resend);
-}
-
-/*
- * Process a ping response.
- */
-static void rxrpc_input_ping_response(struct rxrpc_call *call,
- ktime_t resp_time,
- rxrpc_serial_t acked_serial,
- rxrpc_serial_t ack_serial)
-{
- if (acked_serial == call->acks_lost_ping)
- rxrpc_input_check_for_lost_ack(call);
-}
-
/*
* Process the extra information that may be appended to an ACK packet
*/
@@ -797,7 +762,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
struct rxrpc_ackpacket ack;
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
struct rxrpc_ackinfo info;
- struct sk_buff *skb_old = NULL, *skb_put = skb;
rxrpc_serial_t ack_serial, acked_serial;
rxrpc_seq_t first_soft_ack, hard_ack, prev_pkt;
int nr_acks, offset, ioffset;
@@ -805,10 +769,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
_enter("");
offset = sizeof(struct rxrpc_wire_header);
- if (skb_copy_bits(skb, offset, &ack, sizeof(ack)) < 0) {
- rxrpc_proto_abort("XAK", call, 0);
- goto out;
- }
+ if (skb_copy_bits(skb, offset, &ack, sizeof(ack)) < 0)
+ return rxrpc_proto_abort("XAK", call, 0);
offset += sizeof(ack);
ack_serial = sp->hdr.serial;
@@ -859,7 +821,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
rxrpc_is_client_call(call)) {
rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
0, -ENETRESET);
- goto out;
+ return;
}
/* If we get an OUT_OF_SEQUENCE ACK from the server, that can also
@@ -873,7 +835,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
rxrpc_is_client_call(call)) {
rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
0, -ENETRESET);
- goto out;
+ return;
}
/* Discard any out-of-order or duplicate ACKs (outside lock). */
@@ -881,39 +843,25 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial,
first_soft_ack, call->acks_first_seq,
prev_pkt, call->acks_prev_seq);
- goto out;
+ return;
}
info.rxMTU = 0;
ioffset = offset + nr_acks + 3;
if (skb->len >= ioffset + sizeof(info) &&
- skb_copy_bits(skb, ioffset, &info, sizeof(info)) < 0) {
- rxrpc_proto_abort("XAI", call, 0);
- goto out;
- }
+ skb_copy_bits(skb, ioffset, &info, sizeof(info)) < 0)
+ return rxrpc_proto_abort("XAI", call, 0);
if (nr_acks > 0)
skb_condense(skb);
- /* Discard any out-of-order or duplicate ACKs (inside lock). */
- if (!rxrpc_is_ack_valid(call, first_soft_ack, prev_pkt)) {
- trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial,
- first_soft_ack, call->acks_first_seq,
- prev_pkt, call->acks_prev_seq);
- goto out;
- }
call->acks_latest_ts = skb->tstamp;
-
call->acks_first_seq = first_soft_ack;
call->acks_prev_seq = prev_pkt;
switch (ack.reason) {
case RXRPC_ACK_PING:
break;
- case RXRPC_ACK_PING_RESPONSE:
- rxrpc_input_ping_response(call, skb->tstamp, acked_serial,
- ack_serial);
- fallthrough;
default:
if (after(acked_serial, call->acks_highest_serial))
call->acks_highest_serial = acked_serial;
@@ -924,10 +872,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
if (info.rxMTU)
rxrpc_input_ackinfo(call, skb, &info);
- if (first_soft_ack == 0) {
- rxrpc_proto_abort("AK0", call, 0);
- goto out;
- }
+ if (first_soft_ack == 0)
+ return rxrpc_proto_abort("AK0", call, 0);
/* Ignore ACKs unless we are or have just been transmitting. */
switch (READ_ONCE(call->state)) {
@@ -937,45 +883,27 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
case RXRPC_CALL_SERVER_AWAIT_ACK:
break;
default:
- goto out;
+ return;
}
if (before(hard_ack, call->acks_hard_ack) ||
- after(hard_ack, call->tx_top)) {
- rxrpc_proto_abort("AKW", call, 0);
- goto out;
- }
- if (nr_acks > call->tx_top - hard_ack) {
- rxrpc_proto_abort("AKN", call, 0);
- goto out;
- }
+ after(hard_ack, call->tx_top))
+ return rxrpc_proto_abort("AKW", call, 0);
+ if (nr_acks > call->tx_top - hard_ack)
+ return rxrpc_proto_abort("AKN", call, 0);
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;
+ return;
}
}
if (nr_acks > 0) {
- if (offset > (int)skb->len - nr_acks) {
- rxrpc_proto_abort("XSA", call, 0);
- goto out;
- }
-
- spin_lock(&call->acks_ack_lock);
- skb_old = call->acks_soft_tbl;
- call->acks_soft_tbl = skb;
- spin_unlock(&call->acks_ack_lock);
-
+ if (offset > (int)skb->len - nr_acks)
+ return rxrpc_proto_abort("XSA", call, 0);
rxrpc_input_soft_acks(call, skb->data + offset, first_soft_ack,
nr_acks, &summary);
- skb_put = NULL;
- } else if (call->acks_soft_tbl) {
- spin_lock(&call->acks_ack_lock);
- skb_old = call->acks_soft_tbl;
- call->acks_soft_tbl = NULL;
- spin_unlock(&call->acks_ack_lock);
}
if (test_bit(RXRPC_CALL_TX_LAST, &call->flags) &&
@@ -985,9 +913,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
rxrpc_propose_ack_ping_for_lost_reply);
rxrpc_congestion_management(call, skb, &summary, acked_serial);
-out:
- rxrpc_free_skb(skb_put, rxrpc_skb_put_input);
- rxrpc_free_skb(skb_old, rxrpc_skb_put_ack);
}
/*
@@ -1017,13 +942,18 @@ static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb)
/*
* Process an incoming call packet.
*/
-void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb)
+void rxrpc_input_call_packet(struct rxrpc_call *call, struct sk_buff *skb)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
unsigned long timo;
_enter("%p,%p", call, skb);
+ if (sp->hdr.serviceId != call->service_id)
+ call->service_id = sp->hdr.serviceId;
+ if ((int)sp->hdr.serial - (int)call->rx_serial > 0)
+ call->rx_serial = sp->hdr.serial;
+
timo = READ_ONCE(call->next_rx_timo);
if (timo) {
unsigned long now = jiffies, expect_rx_by;
@@ -1041,7 +971,7 @@ void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb)
case RXRPC_PACKET_TYPE_ACK:
rxrpc_input_ack(call, skb);
- goto no_free;
+ break;
case RXRPC_PACKET_TYPE_BUSY:
/* Just ignore BUSY packets from the server; the retry and
@@ -1073,10 +1003,11 @@ void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb)
*
* TODO: If callNumber > call_id + 1, renegotiate security.
*/
-void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx,
- struct rxrpc_connection *conn,
- struct rxrpc_call *call)
+void rxrpc_implicit_end_call(struct rxrpc_call *call, struct sk_buff *skb)
{
+ struct rxrpc_connection *conn = call->conn;
+ struct rxrpc_sock *rx = rcu_access_pointer(call->socket);
+
switch (READ_ONCE(call->state)) {
case RXRPC_CALL_SERVER_AWAIT_ACK:
rxrpc_call_completed(call);
@@ -1084,14 +1015,14 @@ void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx,
case RXRPC_CALL_COMPLETE:
break;
default:
- if (rxrpc_abort_call("IMP", call, 0, RX_CALL_DEAD, -ESHUTDOWN)) {
- set_bit(RXRPC_CALL_EV_ABORT, &call->events);
- rxrpc_queue_call(call, rxrpc_call_queue_abort);
- }
+ if (rxrpc_abort_call("IMP", call, 0, RX_CALL_DEAD, -ESHUTDOWN))
+ rxrpc_send_abort_packet(call);
trace_rxrpc_improper_term(call);
break;
}
+ rxrpc_input_call_event(call, skb);
+
spin_lock(&rx->incoming_lock);
__rxrpc_disconnect_call(conn, call);
spin_unlock(&rx->incoming_lock);
@@ -63,47 +63,22 @@ void rxrpc_error_report(struct sock *sk)
}
/*
- * post connection-level events to the connection
- * - this includes challenges, responses, some aborts and call terminal packet
- * retransmission.
+ * Process event packets targeted at a local endpoint.
*/
-static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn,
- struct sk_buff *skb)
+static void rxrpc_input_version(struct rxrpc_local *local, struct sk_buff *skb)
{
- _enter("%p,%p", conn, skb);
+ struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
+ char v;
- skb_queue_tail(&conn->rx_queue, skb);
- rxrpc_queue_conn(conn, rxrpc_conn_queue_rx_work);
-}
-
-/*
- * post endpoint-level events to the local endpoint
- * - this includes debug and version messages
- */
-static void rxrpc_post_packet_to_local(struct rxrpc_local *local,
- struct sk_buff *skb)
-{
- _enter("%p,%p", local, skb);
+ _enter("");
- if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
- skb_queue_tail(&local->event_queue, skb);
- rxrpc_queue_local(local);
- } else {
- rxrpc_free_skb(skb, rxrpc_skb_put_input);
+ rxrpc_see_skb(skb, rxrpc_skb_see_version);
+ if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), &v, 1) >= 0) {
+ if (v == 0)
+ rxrpc_send_version_request(local, &sp->hdr, skb);
}
-}
-/*
- * put a packet up for transport-level abort
- */
-static void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
-{
- if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
- skb_queue_tail(&local->reject_queue, skb);
- rxrpc_queue_local(local);
- } else {
- rxrpc_free_skb(skb, rxrpc_skb_put_input);
- }
+ rxrpc_free_skb(skb, rxrpc_skb_put_input);
}
/*
@@ -163,14 +138,8 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
struct rxrpc_sock *rx = NULL;
unsigned int channel;
- if (skb->tstamp == 0)
- skb->tstamp = ktime_get_real();
-
skb_pull(skb, sizeof(struct udphdr));
- /* The UDP protocol already released all skb resources;
- * we are free to add our own data there.
- */
sp = rxrpc_skb(skb);
/* dig out the RxRPC connection details */
@@ -186,15 +155,13 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
}
}
- if (skb->tstamp == 0)
- skb->tstamp = ktime_get_real();
trace_rxrpc_rx_packet(sp);
switch (sp->hdr.type) {
case RXRPC_PACKET_TYPE_VERSION:
if (rxrpc_to_client(sp))
goto discard;
- rxrpc_post_packet_to_local(local, skb);
+ rxrpc_input_version(local, skb);
goto out;
case RXRPC_PACKET_TYPE_BUSY:
@@ -215,24 +182,6 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
if (sp->hdr.callNumber == 0 ||
sp->hdr.seq == 0)
goto bad_message;
-
- /* Unshare the packet so that it can be modified for in-place
- * decryption.
- */
- if (sp->hdr.securityIndex != 0) {
- struct sk_buff *nskb = skb_unshare(skb, GFP_ATOMIC);
- if (!nskb) {
- rxrpc_eaten_skb(skb, rxrpc_skb_eaten_by_unshare_nomem);
- goto out;
- }
-
- if (nskb != skb) {
- rxrpc_eaten_skb(skb, rxrpc_skb_eaten_by_unshare);
- skb = nskb;
- rxrpc_new_skb(skb, rxrpc_skb_new_unshared);
- sp = rxrpc_skb(skb);
- }
- }
break;
case RXRPC_PACKET_TYPE_CHALLENGE:
@@ -293,7 +242,7 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
if (sp->hdr.callNumber == 0) {
/* Connection-level packet */
_debug("CONN %p {%d}", conn, conn->debug_id);
- rxrpc_post_packet_to_conn(conn, skb);
+ rxrpc_input_conn_packet(conn, skb);
goto out;
}
@@ -328,7 +277,7 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
sp->hdr.seq,
sp->hdr.serial,
sp->hdr.flags);
- rxrpc_post_packet_to_conn(conn, skb);
+ rxrpc_input_conn_packet(conn, skb);
goto out;
}
@@ -337,18 +286,11 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
if (sp->hdr.callNumber > chan->call_id) {
if (rxrpc_to_client(sp))
goto reject_packet;
- if (call)
- rxrpc_input_implicit_end_call(rx, conn, call);
- call = NULL;
- }
-
- if (call) {
- if (sp->hdr.serviceId != call->service_id)
- call->service_id = sp->hdr.serviceId;
- if ((int)sp->hdr.serial - (int)call->rx_serial > 0)
- call->rx_serial = sp->hdr.serial;
- if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags))
- set_bit(RXRPC_CALL_RX_HEARD, &call->flags);
+ if (call) {
+ rxrpc_implicit_end_call(call, skb);
+ chan->call = NULL;
+ call = NULL;
+ }
}
}
@@ -366,7 +308,11 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
/* Process a call packet; this either discards or passes on the ref
* elsewhere.
*/
+ if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags))
+ set_bit(RXRPC_CALL_RX_HEARD, &call->flags);
+ rcu_read_unlock();
rxrpc_input_call_event(call, skb);
+ rcu_read_lock();
goto out;
discard:
@@ -437,6 +383,11 @@ int rxrpc_io_thread(void *data)
continue;
}
+ if (!list_empty(&local->ack_tx_queue)) {
+ rxrpc_transmit_ack_packets(local);
+ continue;
+ }
+
/* Process received packets and errors. */
if ((skb = __skb_dequeue(&rx_queue))) {
switch (skb->mark) {
@@ -21,9 +21,9 @@ static const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC";
/*
* Reply to a version request
*/
-static void rxrpc_send_version_request(struct rxrpc_local *local,
- struct rxrpc_host_header *hdr,
- struct sk_buff *skb)
+void rxrpc_send_version_request(struct rxrpc_local *local,
+ struct rxrpc_host_header *hdr,
+ struct sk_buff *skb)
{
struct rxrpc_wire_header whdr;
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
@@ -73,40 +73,3 @@ static void rxrpc_send_version_request(struct rxrpc_local *local,
_leave("");
}
-
-/*
- * Process event packets targeted at a local endpoint.
- */
-void rxrpc_process_local_events(struct rxrpc_local *local)
-{
- struct sk_buff *skb;
- char v;
-
- _enter("");
-
- skb = skb_dequeue(&local->event_queue);
- if (skb) {
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
-
- rxrpc_see_skb(skb, rxrpc_skb_see_local_work);
- _debug("{%d},{%u}", local->debug_id, sp->hdr.type);
-
- switch (sp->hdr.type) {
- case RXRPC_PACKET_TYPE_VERSION:
- if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
- &v, 1) < 0)
- return;
- if (v == 0)
- rxrpc_send_version_request(local, &sp->hdr, skb);
- break;
-
- default:
- /* Just ignore anything we don't understand */
- break;
- }
-
- rxrpc_free_skb(skb, rxrpc_skb_put_input);
- }
-
- _leave("");
-}
@@ -20,7 +20,6 @@
#include <net/af_rxrpc.h>
#include "ar-internal.h"
-static void rxrpc_local_processor(struct work_struct *);
static void rxrpc_local_rcu(struct rcu_head *);
/*
@@ -97,12 +96,9 @@ static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet,
atomic_set(&local->active_users, 1);
local->rxnet = rxnet;
INIT_HLIST_NODE(&local->link);
- INIT_WORK(&local->processor, rxrpc_local_processor);
INIT_LIST_HEAD(&local->ack_tx_queue);
spin_lock_init(&local->ack_tx_lock);
init_rwsem(&local->defrag_sem);
- skb_queue_head_init(&local->reject_queue);
- skb_queue_head_init(&local->event_queue);
skb_queue_head_init(&local->rx_queue);
INIT_LIST_HEAD(&local->call_attend_q);
local->client_bundles = RB_ROOT;
@@ -318,21 +314,6 @@ struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local,
return NULL;
}
-/*
- * Queue a local endpoint and pass the caller's reference to the work item.
- */
-void rxrpc_queue_local(struct rxrpc_local *local)
-{
- unsigned int debug_id = local->debug_id;
- int r = refcount_read(&local->ref);
- int u = atomic_read(&local->active_users);
-
- if (rxrpc_queue_work(&local->processor))
- trace_rxrpc_local(debug_id, rxrpc_local_queued, r, u);
- else
- rxrpc_put_local(local, rxrpc_local_put_already_queued);
-}
-
/*
* Drop a ref on a local endpoint.
*/
@@ -374,7 +355,7 @@ struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local,
/*
* Cease using a local endpoint. Once the number of active users reaches 0, we
- * start the closure of the transport in the work processor.
+ * start the closure of the transport in the I/O thread..
*/
void rxrpc_unuse_local(struct rxrpc_local *local, enum rxrpc_local_trace why)
{
@@ -416,52 +397,9 @@ void rxrpc_destroy_local(struct rxrpc_local *local)
/* At this point, there should be no more packets coming in to the
* local endpoint.
*/
- rxrpc_purge_queue(&local->reject_queue);
- rxrpc_purge_queue(&local->event_queue);
rxrpc_purge_queue(&local->rx_queue);
}
-/*
- * Process events on an endpoint. The work item carries a ref which
- * we must release.
- */
-static void rxrpc_local_processor(struct work_struct *work)
-{
- struct rxrpc_local *local =
- container_of(work, struct rxrpc_local, processor);
- bool again;
-
- if (local->dead)
- return;
-
- rxrpc_see_local(local, rxrpc_local_processing);
-
- do {
- again = false;
- if (!__rxrpc_use_local(local, rxrpc_local_use_work))
- break;
-
- if (!list_empty(&local->ack_tx_queue)) {
- rxrpc_transmit_ack_packets(local);
- again = true;
- }
-
- if (!skb_queue_empty(&local->reject_queue)) {
- rxrpc_reject_packets(local);
- again = true;
- }
-
- if (!skb_queue_empty(&local->event_queue)) {
- rxrpc_process_local_events(local);
- again = true;
- }
-
- __rxrpc_unuse_local(local, rxrpc_local_unuse_work);
- } while (again);
-
- rxrpc_put_local(local, rxrpc_local_put_queue);
-}
-
/*
* Destroy a local endpoint after the RCU grace period expires.
*/
@@ -469,13 +407,8 @@ static void rxrpc_local_rcu(struct rcu_head *rcu)
{
struct rxrpc_local *local = container_of(rcu, struct rxrpc_local, rcu);
- _enter("%d", local->debug_id);
-
- ASSERT(!work_pending(&local->processor));
-
rxrpc_see_local(local, rxrpc_local_free);
kfree(local);
- _leave("");
}
/*
@@ -229,11 +229,6 @@ static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf *
if (txb->ack.reason == RXRPC_ACK_PING)
txb->wire.flags |= RXRPC_REQUEST_ACK;
- if (txb->ack.reason == RXRPC_ACK_DELAY)
- clear_bit(RXRPC_CALL_DELAY_ACK_PENDING, &call->flags);
- if (txb->ack.reason == RXRPC_ACK_IDLE)
- clear_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags);
-
n = rxrpc_fill_out_ack(conn, call, txb);
if (n == 0)
return 0;
@@ -247,8 +242,6 @@ static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf *
trace_rxrpc_tx_ack(call->debug_id, serial,
ntohl(txb->ack.firstPacket),
ntohl(txb->ack.serial), txb->ack.reason, txb->ack.nAcks);
- if (txb->ack_why == rxrpc_propose_ack_ping_for_lost_ack)
- call->acks_lost_ping = serial;
if (txb->ack.reason == RXRPC_ACK_PING)
rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_ping);
@@ -588,21 +581,20 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
}
/*
- * reject packets through the local endpoint
+ * Reject a packet through the local endpoint.
*/
-void rxrpc_reject_packets(struct rxrpc_local *local)
+void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
{
- struct sockaddr_rxrpc srx;
- struct rxrpc_skb_priv *sp;
struct rxrpc_wire_header whdr;
- struct sk_buff *skb;
+ struct sockaddr_rxrpc srx;
+ struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
struct msghdr msg;
struct kvec iov[2];
size_t size;
__be32 code;
int ret, ioc;
- _enter("%d", local->debug_id);
+ rxrpc_see_skb(skb, rxrpc_skb_see_reject);
iov[0].iov_base = &whdr;
iov[0].iov_len = sizeof(whdr);
@@ -616,51 +608,45 @@ void rxrpc_reject_packets(struct rxrpc_local *local)
memset(&whdr, 0, sizeof(whdr));
- while ((skb = skb_dequeue(&local->reject_queue))) {
- rxrpc_see_skb(skb, rxrpc_skb_see_reject);
- sp = rxrpc_skb(skb);
+ switch (skb->mark) {
+ case RXRPC_SKB_MARK_REJECT_BUSY:
+ whdr.type = RXRPC_PACKET_TYPE_BUSY;
+ size = sizeof(whdr);
+ ioc = 1;
+ break;
+ case RXRPC_SKB_MARK_REJECT_ABORT:
+ whdr.type = RXRPC_PACKET_TYPE_ABORT;
+ code = htonl(skb->priority);
+ size = sizeof(whdr) + sizeof(code);
+ ioc = 2;
+ break;
+ default:
+ goto out;
+ }
- switch (skb->mark) {
- case RXRPC_SKB_MARK_REJECT_BUSY:
- whdr.type = RXRPC_PACKET_TYPE_BUSY;
- size = sizeof(whdr);
- ioc = 1;
- break;
- case RXRPC_SKB_MARK_REJECT_ABORT:
- whdr.type = RXRPC_PACKET_TYPE_ABORT;
- code = htonl(skb->priority);
- size = sizeof(whdr) + sizeof(code);
- ioc = 2;
- break;
- default:
- rxrpc_free_skb(skb, rxrpc_skb_put_input);
- continue;
- }
+ if (rxrpc_extract_addr_from_skb(&srx, skb) == 0) {
+ msg.msg_namelen = srx.transport_len;
- if (rxrpc_extract_addr_from_skb(&srx, skb) == 0) {
- msg.msg_namelen = srx.transport_len;
-
- whdr.epoch = htonl(sp->hdr.epoch);
- whdr.cid = htonl(sp->hdr.cid);
- whdr.callNumber = htonl(sp->hdr.callNumber);
- whdr.serviceId = htons(sp->hdr.serviceId);
- whdr.flags = sp->hdr.flags;
- whdr.flags ^= RXRPC_CLIENT_INITIATED;
- whdr.flags &= RXRPC_CLIENT_INITIATED;
-
- iov_iter_kvec(&msg.msg_iter, WRITE, iov, ioc, size);
- ret = do_udp_sendmsg(local->socket, &msg, size);
- if (ret < 0)
- trace_rxrpc_tx_fail(local->debug_id, 0, ret,
- rxrpc_tx_point_reject);
- else
- trace_rxrpc_tx_packet(local->debug_id, &whdr,
- rxrpc_tx_point_reject);
- }
+ whdr.epoch = htonl(sp->hdr.epoch);
+ whdr.cid = htonl(sp->hdr.cid);
+ whdr.callNumber = htonl(sp->hdr.callNumber);
+ whdr.serviceId = htons(sp->hdr.serviceId);
+ whdr.flags = sp->hdr.flags;
+ whdr.flags ^= RXRPC_CLIENT_INITIATED;
+ whdr.flags &= RXRPC_CLIENT_INITIATED;
- rxrpc_free_skb(skb, rxrpc_skb_put_input);
+ iov_iter_kvec(&msg.msg_iter, WRITE, iov, ioc, size);
+ ret = do_udp_sendmsg(local->socket, &msg, size);
+ if (ret < 0)
+ trace_rxrpc_tx_fail(local->debug_id, 0, ret,
+ rxrpc_tx_point_reject);
+ else
+ trace_rxrpc_tx_packet(local->debug_id, &whdr,
+ rxrpc_tx_point_reject);
}
+out:
+ rxrpc_free_skb(skb, rxrpc_skb_put_input);
_leave("");
}
@@ -18,9 +18,9 @@
#include <net/ip.h>
#include "ar-internal.h"
-static void rxrpc_store_error(struct rxrpc_peer *, struct sock_exterr_skb *);
-static void rxrpc_distribute_error(struct rxrpc_peer *, int,
- enum rxrpc_call_completion);
+static void rxrpc_store_error(struct rxrpc_peer *, struct sk_buff *);
+static void rxrpc_distribute_error(struct rxrpc_peer *, struct sk_buff *,
+ enum rxrpc_call_completion, int);
/*
* Find the peer associated with a local error.
@@ -161,7 +161,7 @@ void rxrpc_input_error(struct rxrpc_local *local, struct sk_buff *skb)
goto out;
}
- rxrpc_store_error(peer, serr);
+ rxrpc_store_error(peer, skb);
out:
rxrpc_put_peer(peer, rxrpc_peer_put_input_error);
}
@@ -169,19 +169,15 @@ void rxrpc_input_error(struct rxrpc_local *local, struct sk_buff *skb)
/*
* Map an error report to error codes on the peer record.
*/
-static void rxrpc_store_error(struct rxrpc_peer *peer,
- struct sock_exterr_skb *serr)
+static void rxrpc_store_error(struct rxrpc_peer *peer, struct sk_buff *skb)
{
enum rxrpc_call_completion compl = RXRPC_CALL_NETWORK_ERROR;
- struct sock_extended_err *ee;
- int err;
+ struct sock_exterr_skb *serr = SKB_EXT_ERR(skb);
+ struct sock_extended_err *ee = &serr->ee;
+ int err = ee->ee_errno;
_enter("");
- ee = &serr->ee;
-
- err = ee->ee_errno;
-
switch (ee->ee_origin) {
case SO_EE_ORIGIN_NONE:
case SO_EE_ORIGIN_LOCAL:
@@ -197,14 +193,14 @@ static void rxrpc_store_error(struct rxrpc_peer *peer,
break;
}
- rxrpc_distribute_error(peer, err, compl);
+ rxrpc_distribute_error(peer, skb, compl, err);
}
/*
* Distribute an error that occurred on a peer.
*/
-static void rxrpc_distribute_error(struct rxrpc_peer *peer, int error,
- enum rxrpc_call_completion compl)
+static void rxrpc_distribute_error(struct rxrpc_peer *peer, struct sk_buff *skb,
+ enum rxrpc_call_completion compl, int err)
{
struct rxrpc_call *call;
HLIST_HEAD(error_targets);
@@ -219,7 +215,8 @@ static void rxrpc_distribute_error(struct rxrpc_peer *peer, int error,
spin_unlock(&peer->lock);
rxrpc_see_call(call, rxrpc_call_see_distribute_error);
- rxrpc_set_call_completion(call, compl, 0, -error);
+ rxrpc_set_call_completion(call, compl, 0, -err);
+ rxrpc_input_call_event(call, skb);
spin_lock(&peer->lock);
}
@@ -253,11 +253,8 @@ static void rxrpc_rotate_rx_window(struct rxrpc_call *call)
acked = atomic_add_return(call->rx_consumed - old_consumed,
&call->ackr_nr_consumed);
if (acked > 2 &&
- !test_and_set_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags)) {
- rxrpc_send_ACK(call, RXRPC_ACK_IDLE, serial,
- rxrpc_propose_ack_rotate_rx);
- rxrpc_transmit_ack_packets(call->peer->local);
- }
+ !test_and_set_bit(RXRPC_CALL_RX_IS_IDLE, &call->flags))
+ rxrpc_poke_call(call, rxrpc_call_poke_idle);
}
/*
@@ -377,7 +374,7 @@ static int rxrpc_recvmsg_data(struct socket *sock, struct rxrpc_call *call,
trace_rxrpc_recvdata(call, rxrpc_recvmsg_data_return, seq,
rx_pkt_offset, rx_pkt_len, ret);
if (ret == -EAGAIN)
- set_bit(RXRPC_CALL_RX_UNDERRUN, &call->flags);
+ set_bit(RXRPC_CALL_RX_IS_IDLE, &call->flags);
return ret;
}
@@ -170,7 +170,7 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
{
unsigned long now;
rxrpc_seq_t seq = txb->seq;
- bool last = test_bit(RXRPC_TXBUF_LAST, &txb->flags);
+ bool last = test_bit(RXRPC_TXBUF_LAST, &txb->flags), poke;
rxrpc_inc_stat(call->rxnet, stat_tx_data);
@@ -188,6 +188,7 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
/* Add the packet to the call's output buffer */
spin_lock(&call->tx_lock);
+ poke = list_empty(&call->tx_sendmsg);
list_add_tail(&txb->call_link, &call->tx_sendmsg);
call->tx_prepared = seq;
spin_unlock(&call->tx_lock);
@@ -220,11 +221,8 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
write_unlock(&call->state_lock);
}
-
- /* Stick the packet on the crypto queue or the transmission queue as
- * appropriate.
- */
- rxrpc_queue_call(call, rxrpc_call_queue_tx_data);
+ if (poke)
+ rxrpc_poke_call(call, rxrpc_call_poke_start);
}
/*
Move the functions from the call->processor and local->processor work items into the domain of the I/O thread. The call event processor, now called from the I/O thread, then takes over the job of cranking the call state machine, processing incoming packets and transmitting DATA, ACK and ABORT packets. In a future patch, rxrpc_send_ACK() will transmit the ACK on the spot rather than queuing it for later transmission. The call event processor becomes purely received-skb driven. It only transmits things in response to events. We use "pokes" to queue a dummy skb to make it do things like start/resume transmitting data. Timer expiry also results in pokes. The connection event processor, becomes similar, though crypto events, such as dealing with CHALLENGE and RESPONSE packets is offloaded to a work item to avoid doing crypto in the I/O thread. The local event processor is removed and VERSION response packets are generated directly from the packet parser. Similarly, ABORTs generated in response to protocol errors will be transmitted immediately rather than being pushed onto a queue for later transmission. Signed-off-by: David Howells <dhowells@redhat.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: linux-afs@lists.infradead.org --- include/trace/events/rxrpc.h | 39 +++------ net/rxrpc/ar-internal.h | 37 +++------ net/rxrpc/call_accept.c | 41 +--------- net/rxrpc/call_event.c | 175 +++++++++++++++++------------------------- net/rxrpc/call_object.c | 73 +++++++----------- net/rxrpc/conn_event.c | 63 +++++++++++++++ net/rxrpc/input.c | 161 +++++++++++---------------------------- net/rxrpc/io_thread.c | 103 ++++++------------------- net/rxrpc/local_event.c | 43 +--------- net/rxrpc/local_object.c | 69 ----------------- net/rxrpc/output.c | 92 +++++++++------------- net/rxrpc/peer_event.c | 29 +++---- net/rxrpc/recvmsg.c | 9 +- net/rxrpc/sendmsg.c | 10 +- 14 files changed, 327 insertions(+), 617 deletions(-)