mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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RxRPC rewrite
-----BEGIN PGP SIGNATURE----- iQIVAwUAV/YbX/Sw1s6N8H32AQLwDg//W0fGt3OSFrOpEQHtKUSCWO3m4RRJgn/m Xbaz8ZO6Z8qmdkM267yrLCAp5hx0E77WP46l7V3B9p9wX0vA+P2QO7K5Kis6sNaY aceCCAKHqvUSiZa8tQ2aGpbxxa8qICbjHjiCg0lFABiGDWGRnIBNW8qV5LyGKZkI 7b3i9MGBkGLdZxetcJd498j6Gck9cuqOZDnfqgb0Q5pAtsjVM3EZXXsHO1ZD5WHG GUieQgY9Tp0rlVKjlLdR94fW/acMZYs0c5RO1uzGAoUeBALnSUS5+bSRSlGp1KOM C7r5/dK4FvkZY+xuS5pLXoI8WpsA4EDpBINGdO6L03wTJ10zx5y5CdTTl7G6Y53R BpmY8SDFmWYqpJs+gZiWYIlbnBQ+b0Mu7p7rKeSJS/q0+YEVwJlz3UFo2k1O+J3A ovpxP5E6IvOjlKF21Zs1hOR2m/sfR42v/TfwpApImSeY2k2m8vzyfXBJP4ClAk29 PGYOOqMLYwzIjLwdapDxL3ccjKvOwYeClCs1t6bKva2XCrF1ybtBnAQDxFp6KzXi p/y/QkHnseSeYct8mElDopRekbwoqa9YPwXn7lagvQhNxqNGIR4HT82IeohI/Dqe GtQbjSPc3uebk5lRf535kTZixu+l5/yKQeuRTsfoIgsMjVlMdqS9dUAphzI4IXLp FE0q49uLTVI= =+Jr3 -----END PGP SIGNATURE----- Merge tag 'rxrpc-rewrite-20161004' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs David Howells says: ==================== rxrpc: Fixes This set of patches contains a bunch of fixes: (1) Fix an oops on incoming call to a local endpoint without a bound service. (2) Only ping for a lost reply in a client call (this is inapplicable to service calls). (3) Fix maybe uninitialised variable warnings in the ACK/ABORT sending function by splitting it. (4) Fix loss of PING RESPONSE ACKs due to them being subsumed by PING ACK generation. (5) OpenAFS improperly terminates calls it makes as a client under some circumstances by not fully hard-ACK'ing the last DATA packets. This is alleviated by a new call appearing on the same channel implicitly completing the previous call on that channel. Handle this implicit completion. (6) Properly handle expiry of service calls due to the aforementioned improper termination with no follow up call to implicitly complete it: (a) The call's background processor needs to be queued to complete the call, send an abort and notify the socket. (b) The call's background processor needs to notify the socket (or the kernel service) when it has completed the call. (c) A negative error code must thence be returned to the kernel service so that it knows the call died. (d) The AFS filesystem must detect the fatal error and end the call. (7) Must produce a DELAY ACK when the actual service operation takes a while to process and must cancel the ACK when the reply is ready. (8) Don't request an ACK on the last DATA packet of the Tx phase as this confuses OpenAFS. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
commit
0d818c2889
12 changed files with 254 additions and 119 deletions
|
@ -418,7 +418,7 @@ static void afs_deliver_to_call(struct afs_call *call)
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&call->abort_code);
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if (ret == -EINPROGRESS || ret == -EAGAIN)
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return;
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if (ret == 1) {
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if (ret == 1 || ret < 0) {
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call->state = AFS_CALL_COMPLETE;
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goto done;
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}
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@ -678,9 +678,9 @@ static int rxrpc_release_sock(struct sock *sk)
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sk->sk_state = RXRPC_CLOSE;
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spin_unlock_bh(&sk->sk_receive_queue.lock);
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if (rx->local && rx->local->service == rx) {
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if (rx->local && rcu_access_pointer(rx->local->service) == rx) {
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write_lock(&rx->local->services_lock);
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rx->local->service = NULL;
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rcu_assign_pointer(rx->local->service, NULL);
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write_unlock(&rx->local->services_lock);
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}
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@ -398,6 +398,7 @@ enum rxrpc_call_flag {
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RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
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RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
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RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
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RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
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RXRPC_CALL_PINGING, /* Ping in process */
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RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
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};
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@ -410,6 +411,7 @@ enum rxrpc_call_event {
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RXRPC_CALL_EV_ABORT, /* need to generate abort */
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RXRPC_CALL_EV_TIMER, /* Timer expired */
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RXRPC_CALL_EV_RESEND, /* Tx resend required */
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RXRPC_CALL_EV_PING, /* Ping send required */
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};
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/*
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@ -466,6 +468,7 @@ struct rxrpc_call {
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struct rxrpc_sock __rcu *socket; /* socket responsible */
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ktime_t ack_at; /* When deferred ACK needs to happen */
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ktime_t resend_at; /* When next resend needs to happen */
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ktime_t ping_at; /* When next to send a ping */
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ktime_t expire_at; /* When the call times out */
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struct timer_list timer; /* Combined event timer */
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struct work_struct processor; /* Event processor */
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@ -558,8 +561,10 @@ struct rxrpc_call {
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rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
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rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
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rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
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rxrpc_serial_t ackr_ping; /* Last ping sent */
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ktime_t ackr_ping_time; /* Time last ping sent */
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/* ping management */
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rxrpc_serial_t ping_serial; /* Last ping sent */
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ktime_t ping_time; /* Time last ping sent */
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/* transmission-phase ACK management */
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ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
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@ -728,8 +733,10 @@ extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5];
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enum rxrpc_timer_trace {
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rxrpc_timer_begin,
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rxrpc_timer_init_for_reply,
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rxrpc_timer_init_for_send_reply,
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rxrpc_timer_expired,
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rxrpc_timer_set_for_ack,
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rxrpc_timer_set_for_ping,
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rxrpc_timer_set_for_resend,
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rxrpc_timer_set_for_send,
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rxrpc_timer__nr_trace
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@ -743,6 +750,7 @@ enum rxrpc_propose_ack_trace {
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rxrpc_propose_ack_ping_for_lost_ack,
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rxrpc_propose_ack_ping_for_lost_reply,
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rxrpc_propose_ack_ping_for_params,
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rxrpc_propose_ack_processing_op,
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rxrpc_propose_ack_respond_to_ack,
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rxrpc_propose_ack_respond_to_ping,
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rxrpc_propose_ack_retry_tx,
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@ -777,7 +785,7 @@ extern const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10];
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extern const char rxrpc_congest_changes[rxrpc_congest__nr_change][9];
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extern const char *const rxrpc_pkts[];
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extern const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4];
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extern const char rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4];
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#include <trace/events/rxrpc.h>
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@ -805,6 +813,7 @@ int rxrpc_reject_call(struct rxrpc_sock *);
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/*
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* call_event.c
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*/
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void __rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
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void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
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void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
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enum rxrpc_propose_ack_trace);
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@ -1068,7 +1077,8 @@ extern const s8 rxrpc_ack_priority[];
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/*
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* output.c
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*/
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int rxrpc_send_call_packet(struct rxrpc_call *, u8);
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int rxrpc_send_ack_packet(struct rxrpc_call *, bool);
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int rxrpc_send_abort_packet(struct rxrpc_call *);
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int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
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void rxrpc_reject_packets(struct rxrpc_local *);
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@ -337,7 +337,7 @@ struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local,
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/* Get the socket providing the service */
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rx = rcu_dereference(local->service);
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if (service_id == rx->srx.srx_service)
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if (rx && service_id == rx->srx.srx_service)
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goto found_service;
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trace_rxrpc_abort("INV", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
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@ -565,7 +565,7 @@ int rxrpc_reject_call(struct rxrpc_sock *rx)
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write_unlock_bh(&call->state_lock);
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write_unlock(&rx->call_lock);
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if (abort) {
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rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
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rxrpc_send_abort_packet(call);
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rxrpc_release_call(rx, call);
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rxrpc_put_call(call, rxrpc_call_put);
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}
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@ -24,19 +24,20 @@
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/*
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* Set the timer
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*/
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void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
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ktime_t now)
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void __rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
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ktime_t now)
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{
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unsigned long t_j, now_j = jiffies;
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ktime_t t;
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bool queue = false;
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read_lock_bh(&call->state_lock);
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if (call->state < RXRPC_CALL_COMPLETE) {
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t = call->expire_at;
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if (!ktime_after(t, now))
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if (!ktime_after(t, now)) {
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trace_rxrpc_timer(call, why, now, now_j);
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queue = true;
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goto out;
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}
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if (!ktime_after(call->resend_at, now)) {
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call->resend_at = call->expire_at;
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@ -54,6 +55,14 @@ void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
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t = call->ack_at;
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}
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if (!ktime_after(call->ping_at, now)) {
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call->ping_at = call->expire_at;
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if (!test_and_set_bit(RXRPC_CALL_EV_PING, &call->events))
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queue = true;
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} else if (ktime_before(call->ping_at, t)) {
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t = call->ping_at;
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}
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t_j = nsecs_to_jiffies(ktime_to_ns(ktime_sub(t, now)));
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t_j += jiffies;
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@ -68,15 +77,45 @@ void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
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mod_timer(&call->timer, t_j);
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trace_rxrpc_timer(call, why, now, now_j);
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}
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if (queue)
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rxrpc_queue_call(call);
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}
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out:
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if (queue)
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rxrpc_queue_call(call);
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}
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/*
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* Set the timer
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*/
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void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
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ktime_t now)
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{
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read_lock_bh(&call->state_lock);
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__rxrpc_set_timer(call, why, now);
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read_unlock_bh(&call->state_lock);
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}
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/*
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* Propose a PING ACK be sent.
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*/
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static void rxrpc_propose_ping(struct rxrpc_call *call,
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bool immediate, bool background)
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{
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if (immediate) {
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if (background &&
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!test_and_set_bit(RXRPC_CALL_EV_PING, &call->events))
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rxrpc_queue_call(call);
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} else {
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ktime_t now = ktime_get_real();
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ktime_t ping_at = ktime_add_ms(now, rxrpc_idle_ack_delay);
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if (ktime_before(ping_at, call->ping_at)) {
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call->ping_at = ping_at;
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rxrpc_set_timer(call, rxrpc_timer_set_for_ping, now);
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}
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}
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}
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/*
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* propose an ACK be sent
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*/
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@ -90,6 +129,14 @@ static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
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ktime_t now, ack_at;
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s8 prior = rxrpc_ack_priority[ack_reason];
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/* Pings are handled specially because we don't want to accidentally
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* lose a ping response by subsuming it into a ping.
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*/
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if (ack_reason == RXRPC_ACK_PING) {
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rxrpc_propose_ping(call, immediate, background);
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goto trace;
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}
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/* Update DELAY, IDLE, REQUESTED and PING_RESPONSE ACK serial
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* numbers, but we don't alter the timeout.
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*/
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@ -125,7 +172,6 @@ static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
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expiry = rxrpc_soft_ack_delay;
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break;
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case RXRPC_ACK_PING:
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case RXRPC_ACK_IDLE:
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if (rxrpc_idle_ack_delay < expiry)
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expiry = rxrpc_idle_ack_delay;
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@ -253,7 +299,7 @@ static void rxrpc_resend(struct rxrpc_call *call, ktime_t now)
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goto out;
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rxrpc_propose_ACK(call, RXRPC_ACK_PING, 0, 0, true, false,
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rxrpc_propose_ack_ping_for_lost_ack);
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rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ACK);
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rxrpc_send_ack_packet(call, true);
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goto out;
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}
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|
@ -328,12 +374,13 @@ void rxrpc_process_call(struct work_struct *work)
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recheck_state:
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if (test_and_clear_bit(RXRPC_CALL_EV_ABORT, &call->events)) {
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rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
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rxrpc_send_abort_packet(call);
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goto recheck_state;
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}
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|
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if (call->state == RXRPC_CALL_COMPLETE) {
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del_timer_sync(&call->timer);
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rxrpc_notify_socket(call);
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goto out_put;
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}
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|
@ -345,13 +392,17 @@ void rxrpc_process_call(struct work_struct *work)
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}
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|
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if (test_and_clear_bit(RXRPC_CALL_EV_ACK, &call->events)) {
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call->ack_at = call->expire_at;
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if (call->ackr_reason) {
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rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ACK);
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rxrpc_send_ack_packet(call, false);
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goto recheck_state;
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}
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}
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|
||||
if (test_and_clear_bit(RXRPC_CALL_EV_PING, &call->events)) {
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rxrpc_send_ack_packet(call, true);
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goto recheck_state;
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}
|
||||
|
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if (test_and_clear_bit(RXRPC_CALL_EV_RESEND, &call->events)) {
|
||||
rxrpc_resend(call, now);
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||||
goto recheck_state;
|
||||
|
|
|
@ -205,6 +205,7 @@ static void rxrpc_start_call_timer(struct rxrpc_call *call)
|
|||
expire_at = ktime_add_ms(now, rxrpc_max_call_lifetime);
|
||||
call->expire_at = expire_at;
|
||||
call->ack_at = expire_at;
|
||||
call->ping_at = expire_at;
|
||||
call->resend_at = expire_at;
|
||||
call->timer.expires = jiffies + LONG_MAX / 2;
|
||||
rxrpc_set_timer(call, rxrpc_timer_begin, now);
|
||||
|
@ -498,7 +499,7 @@ void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
|
|||
struct rxrpc_call, sock_link);
|
||||
rxrpc_get_call(call, rxrpc_call_got);
|
||||
rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, ECONNRESET);
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
|
||||
rxrpc_send_abort_packet(call);
|
||||
rxrpc_release_call(rx, call);
|
||||
rxrpc_put_call(call, rxrpc_call_put);
|
||||
}
|
||||
|
|
|
@ -625,9 +625,9 @@ static void rxrpc_input_ping_response(struct rxrpc_call *call,
|
|||
rxrpc_serial_t ping_serial;
|
||||
ktime_t ping_time;
|
||||
|
||||
ping_time = call->ackr_ping_time;
|
||||
ping_time = call->ping_time;
|
||||
smp_rmb();
|
||||
ping_serial = call->ackr_ping;
|
||||
ping_serial = call->ping_serial;
|
||||
|
||||
if (!test_bit(RXRPC_CALL_PINGING, &call->flags) ||
|
||||
before(orig_serial, ping_serial))
|
||||
|
@ -847,7 +847,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
|
|||
|
||||
if (call->rxtx_annotations[call->tx_top & RXRPC_RXTX_BUFF_MASK] &
|
||||
RXRPC_TX_ANNO_LAST &&
|
||||
summary.nr_acks == call->tx_top - hard_ack)
|
||||
summary.nr_acks == call->tx_top - hard_ack &&
|
||||
rxrpc_is_client_call(call))
|
||||
rxrpc_propose_ACK(call, RXRPC_ACK_PING, skew, sp->hdr.serial,
|
||||
false, true,
|
||||
rxrpc_propose_ack_ping_for_lost_reply);
|
||||
|
@ -937,6 +938,33 @@ static void rxrpc_input_call_packet(struct rxrpc_call *call,
|
|||
_leave("");
|
||||
}
|
||||
|
||||
/*
|
||||
* Handle a new call on a channel implicitly completing the preceding call on
|
||||
* that channel.
|
||||
*
|
||||
* TODO: If callNumber > call_id + 1, renegotiate security.
|
||||
*/
|
||||
static void rxrpc_input_implicit_end_call(struct rxrpc_connection *conn,
|
||||
struct rxrpc_call *call)
|
||||
{
|
||||
switch (call->state) {
|
||||
case RXRPC_CALL_SERVER_AWAIT_ACK:
|
||||
rxrpc_call_completed(call);
|
||||
break;
|
||||
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);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
__rxrpc_disconnect_call(conn, call);
|
||||
rxrpc_notify_socket(call);
|
||||
}
|
||||
|
||||
/*
|
||||
* post connection-level events to the connection
|
||||
* - this includes challenges, responses, some aborts and call terminal packet
|
||||
|
@ -1145,6 +1173,16 @@ void rxrpc_data_ready(struct sock *udp_sk)
|
|||
}
|
||||
|
||||
call = rcu_dereference(chan->call);
|
||||
|
||||
if (sp->hdr.callNumber > chan->call_id) {
|
||||
if (!(sp->hdr.flags & RXRPC_CLIENT_INITIATED)) {
|
||||
rcu_read_unlock();
|
||||
goto reject_packet;
|
||||
}
|
||||
if (call)
|
||||
rxrpc_input_implicit_end_call(conn, call);
|
||||
call = NULL;
|
||||
}
|
||||
} else {
|
||||
skew = 0;
|
||||
call = NULL;
|
||||
|
|
|
@ -93,10 +93,9 @@ const s8 rxrpc_ack_priority[] = {
|
|||
[RXRPC_ACK_EXCEEDS_WINDOW] = 6,
|
||||
[RXRPC_ACK_NOSPACE] = 7,
|
||||
[RXRPC_ACK_PING_RESPONSE] = 8,
|
||||
[RXRPC_ACK_PING] = 9,
|
||||
};
|
||||
|
||||
const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4] = {
|
||||
const char rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4] = {
|
||||
"---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY",
|
||||
"IDL", "-?-"
|
||||
};
|
||||
|
@ -196,7 +195,9 @@ const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8] = {
|
|||
[rxrpc_timer_begin] = "Begin ",
|
||||
[rxrpc_timer_expired] = "*EXPR*",
|
||||
[rxrpc_timer_init_for_reply] = "IniRpl",
|
||||
[rxrpc_timer_init_for_send_reply] = "SndRpl",
|
||||
[rxrpc_timer_set_for_ack] = "SetAck",
|
||||
[rxrpc_timer_set_for_ping] = "SetPng",
|
||||
[rxrpc_timer_set_for_send] = "SetTx ",
|
||||
[rxrpc_timer_set_for_resend] = "SetRTx",
|
||||
};
|
||||
|
@ -207,6 +208,7 @@ const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8] = {
|
|||
[rxrpc_propose_ack_ping_for_lost_ack] = "LostAck",
|
||||
[rxrpc_propose_ack_ping_for_lost_reply] = "LostRpl",
|
||||
[rxrpc_propose_ack_ping_for_params] = "Params ",
|
||||
[rxrpc_propose_ack_processing_op] = "ProcOp ",
|
||||
[rxrpc_propose_ack_respond_to_ack] = "Rsp2Ack",
|
||||
[rxrpc_propose_ack_respond_to_ping] = "Rsp2Png",
|
||||
[rxrpc_propose_ack_retry_tx] = "RetryTx",
|
||||
|
|
|
@ -19,26 +19,27 @@
|
|||
#include <net/af_rxrpc.h>
|
||||
#include "ar-internal.h"
|
||||
|
||||
struct rxrpc_pkt_buffer {
|
||||
struct rxrpc_ack_buffer {
|
||||
struct rxrpc_wire_header whdr;
|
||||
union {
|
||||
struct {
|
||||
struct rxrpc_ackpacket ack;
|
||||
u8 acks[255];
|
||||
u8 pad[3];
|
||||
};
|
||||
__be32 abort_code;
|
||||
};
|
||||
struct rxrpc_ackpacket ack;
|
||||
u8 acks[255];
|
||||
u8 pad[3];
|
||||
struct rxrpc_ackinfo ackinfo;
|
||||
};
|
||||
|
||||
struct rxrpc_abort_buffer {
|
||||
struct rxrpc_wire_header whdr;
|
||||
__be32 abort_code;
|
||||
};
|
||||
|
||||
/*
|
||||
* Fill out an ACK packet.
|
||||
*/
|
||||
static size_t rxrpc_fill_out_ack(struct rxrpc_call *call,
|
||||
struct rxrpc_pkt_buffer *pkt,
|
||||
struct rxrpc_ack_buffer *pkt,
|
||||
rxrpc_seq_t *_hard_ack,
|
||||
rxrpc_seq_t *_top)
|
||||
rxrpc_seq_t *_top,
|
||||
u8 reason)
|
||||
{
|
||||
rxrpc_serial_t serial;
|
||||
rxrpc_seq_t hard_ack, top, seq;
|
||||
|
@ -58,10 +59,10 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_call *call,
|
|||
pkt->ack.firstPacket = htonl(hard_ack + 1);
|
||||
pkt->ack.previousPacket = htonl(call->ackr_prev_seq);
|
||||
pkt->ack.serial = htonl(serial);
|
||||
pkt->ack.reason = call->ackr_reason;
|
||||
pkt->ack.reason = reason;
|
||||
pkt->ack.nAcks = top - hard_ack;
|
||||
|
||||
if (pkt->ack.reason == RXRPC_ACK_PING)
|
||||
if (reason == RXRPC_ACK_PING)
|
||||
pkt->whdr.flags |= RXRPC_REQUEST_ACK;
|
||||
|
||||
if (after(top, hard_ack)) {
|
||||
|
@ -91,22 +92,19 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_call *call,
|
|||
}
|
||||
|
||||
/*
|
||||
* Send an ACK or ABORT call packet.
|
||||
* Send an ACK call packet.
|
||||
*/
|
||||
int rxrpc_send_call_packet(struct rxrpc_call *call, u8 type)
|
||||
int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping)
|
||||
{
|
||||
struct rxrpc_connection *conn = NULL;
|
||||
struct rxrpc_pkt_buffer *pkt;
|
||||
struct rxrpc_ack_buffer *pkt;
|
||||
struct msghdr msg;
|
||||
struct kvec iov[2];
|
||||
rxrpc_serial_t serial;
|
||||
rxrpc_seq_t hard_ack, top;
|
||||
size_t len, n;
|
||||
bool ping = false;
|
||||
int ioc, ret;
|
||||
u32 abort_code;
|
||||
|
||||
_enter("%u,%s", call->debug_id, rxrpc_pkts[type]);
|
||||
int ret;
|
||||
u8 reason;
|
||||
|
||||
spin_lock_bh(&call->lock);
|
||||
if (call->conn)
|
||||
|
@ -131,68 +129,44 @@ int rxrpc_send_call_packet(struct rxrpc_call *call, u8 type)
|
|||
pkt->whdr.cid = htonl(call->cid);
|
||||
pkt->whdr.callNumber = htonl(call->call_id);
|
||||
pkt->whdr.seq = 0;
|
||||
pkt->whdr.type = type;
|
||||
pkt->whdr.flags = conn->out_clientflag;
|
||||
pkt->whdr.type = RXRPC_PACKET_TYPE_ACK;
|
||||
pkt->whdr.flags = RXRPC_SLOW_START_OK | conn->out_clientflag;
|
||||
pkt->whdr.userStatus = 0;
|
||||
pkt->whdr.securityIndex = call->security_ix;
|
||||
pkt->whdr._rsvd = 0;
|
||||
pkt->whdr.serviceId = htons(call->service_id);
|
||||
|
||||
iov[0].iov_base = pkt;
|
||||
iov[0].iov_len = sizeof(pkt->whdr);
|
||||
len = sizeof(pkt->whdr);
|
||||
|
||||
switch (type) {
|
||||
case RXRPC_PACKET_TYPE_ACK:
|
||||
spin_lock_bh(&call->lock);
|
||||
spin_lock_bh(&call->lock);
|
||||
if (ping) {
|
||||
reason = RXRPC_ACK_PING;
|
||||
} else {
|
||||
reason = call->ackr_reason;
|
||||
if (!call->ackr_reason) {
|
||||
spin_unlock_bh(&call->lock);
|
||||
ret = 0;
|
||||
goto out;
|
||||
}
|
||||
ping = (call->ackr_reason == RXRPC_ACK_PING);
|
||||
n = rxrpc_fill_out_ack(call, pkt, &hard_ack, &top);
|
||||
call->ackr_reason = 0;
|
||||
|
||||
spin_unlock_bh(&call->lock);
|
||||
|
||||
|
||||
pkt->whdr.flags |= RXRPC_SLOW_START_OK;
|
||||
|
||||
iov[0].iov_len += sizeof(pkt->ack) + n;
|
||||
iov[1].iov_base = &pkt->ackinfo;
|
||||
iov[1].iov_len = sizeof(pkt->ackinfo);
|
||||
len += sizeof(pkt->ack) + n + sizeof(pkt->ackinfo);
|
||||
ioc = 2;
|
||||
break;
|
||||
|
||||
case RXRPC_PACKET_TYPE_ABORT:
|
||||
abort_code = call->abort_code;
|
||||
pkt->abort_code = htonl(abort_code);
|
||||
iov[0].iov_len += sizeof(pkt->abort_code);
|
||||
len += sizeof(pkt->abort_code);
|
||||
ioc = 1;
|
||||
break;
|
||||
|
||||
default:
|
||||
BUG();
|
||||
ret = -ENOANO;
|
||||
goto out;
|
||||
}
|
||||
n = rxrpc_fill_out_ack(call, pkt, &hard_ack, &top, reason);
|
||||
|
||||
spin_unlock_bh(&call->lock);
|
||||
|
||||
iov[0].iov_base = pkt;
|
||||
iov[0].iov_len = sizeof(pkt->whdr) + sizeof(pkt->ack) + n;
|
||||
iov[1].iov_base = &pkt->ackinfo;
|
||||
iov[1].iov_len = sizeof(pkt->ackinfo);
|
||||
len = iov[0].iov_len + iov[1].iov_len;
|
||||
|
||||
serial = atomic_inc_return(&conn->serial);
|
||||
pkt->whdr.serial = htonl(serial);
|
||||
switch (type) {
|
||||
case RXRPC_PACKET_TYPE_ACK:
|
||||
trace_rxrpc_tx_ack(call, serial,
|
||||
ntohl(pkt->ack.firstPacket),
|
||||
ntohl(pkt->ack.serial),
|
||||
pkt->ack.reason, pkt->ack.nAcks);
|
||||
break;
|
||||
}
|
||||
trace_rxrpc_tx_ack(call, serial,
|
||||
ntohl(pkt->ack.firstPacket),
|
||||
ntohl(pkt->ack.serial),
|
||||
pkt->ack.reason, pkt->ack.nAcks);
|
||||
|
||||
if (ping) {
|
||||
call->ackr_ping = serial;
|
||||
call->ping_serial = serial;
|
||||
smp_wmb();
|
||||
/* We need to stick a time in before we send the packet in case
|
||||
* the reply gets back before kernel_sendmsg() completes - but
|
||||
|
@ -201,19 +175,19 @@ int rxrpc_send_call_packet(struct rxrpc_call *call, u8 type)
|
|||
* the packet transmission is more likely to happen towards the
|
||||
* end of the kernel_sendmsg() call.
|
||||
*/
|
||||
call->ackr_ping_time = ktime_get_real();
|
||||
call->ping_time = ktime_get_real();
|
||||
set_bit(RXRPC_CALL_PINGING, &call->flags);
|
||||
trace_rxrpc_rtt_tx(call, rxrpc_rtt_tx_ping, serial);
|
||||
}
|
||||
ret = kernel_sendmsg(conn->params.local->socket,
|
||||
&msg, iov, ioc, len);
|
||||
if (ping)
|
||||
call->ackr_ping_time = ktime_get_real();
|
||||
|
||||
if (type == RXRPC_PACKET_TYPE_ACK &&
|
||||
call->state < RXRPC_CALL_COMPLETE) {
|
||||
ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len);
|
||||
if (ping)
|
||||
call->ping_time = ktime_get_real();
|
||||
|
||||
if (call->state < RXRPC_CALL_COMPLETE) {
|
||||
if (ret < 0) {
|
||||
clear_bit(RXRPC_CALL_PINGING, &call->flags);
|
||||
if (ping)
|
||||
clear_bit(RXRPC_CALL_PINGING, &call->flags);
|
||||
rxrpc_propose_ACK(call, pkt->ack.reason,
|
||||
ntohs(pkt->ack.maxSkew),
|
||||
ntohl(pkt->ack.serial),
|
||||
|
@ -235,6 +209,56 @@ int rxrpc_send_call_packet(struct rxrpc_call *call, u8 type)
|
|||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Send an ABORT call packet.
|
||||
*/
|
||||
int rxrpc_send_abort_packet(struct rxrpc_call *call)
|
||||
{
|
||||
struct rxrpc_connection *conn = NULL;
|
||||
struct rxrpc_abort_buffer pkt;
|
||||
struct msghdr msg;
|
||||
struct kvec iov[1];
|
||||
rxrpc_serial_t serial;
|
||||
int ret;
|
||||
|
||||
spin_lock_bh(&call->lock);
|
||||
if (call->conn)
|
||||
conn = rxrpc_get_connection_maybe(call->conn);
|
||||
spin_unlock_bh(&call->lock);
|
||||
if (!conn)
|
||||
return -ECONNRESET;
|
||||
|
||||
msg.msg_name = &call->peer->srx.transport;
|
||||
msg.msg_namelen = call->peer->srx.transport_len;
|
||||
msg.msg_control = NULL;
|
||||
msg.msg_controllen = 0;
|
||||
msg.msg_flags = 0;
|
||||
|
||||
pkt.whdr.epoch = htonl(conn->proto.epoch);
|
||||
pkt.whdr.cid = htonl(call->cid);
|
||||
pkt.whdr.callNumber = htonl(call->call_id);
|
||||
pkt.whdr.seq = 0;
|
||||
pkt.whdr.type = RXRPC_PACKET_TYPE_ABORT;
|
||||
pkt.whdr.flags = conn->out_clientflag;
|
||||
pkt.whdr.userStatus = 0;
|
||||
pkt.whdr.securityIndex = call->security_ix;
|
||||
pkt.whdr._rsvd = 0;
|
||||
pkt.whdr.serviceId = htons(call->service_id);
|
||||
pkt.abort_code = htonl(call->abort_code);
|
||||
|
||||
iov[0].iov_base = &pkt;
|
||||
iov[0].iov_len = sizeof(pkt);
|
||||
|
||||
serial = atomic_inc_return(&conn->serial);
|
||||
pkt.whdr.serial = htonl(serial);
|
||||
|
||||
ret = kernel_sendmsg(conn->params.local->socket,
|
||||
&msg, iov, 1, sizeof(pkt));
|
||||
|
||||
rxrpc_put_connection(conn);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* send a packet through the transport endpoint
|
||||
*/
|
||||
|
@ -283,11 +307,12 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
|
|||
/* If our RTT cache needs working on, request an ACK. Also request
|
||||
* ACKs if a DATA packet appears to have been lost.
|
||||
*/
|
||||
if (retrans ||
|
||||
call->cong_mode == RXRPC_CALL_SLOW_START ||
|
||||
(call->peer->rtt_usage < 3 && sp->hdr.seq & 1) ||
|
||||
ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000),
|
||||
ktime_get_real()))
|
||||
if (!(sp->hdr.flags & RXRPC_LAST_PACKET) &&
|
||||
(retrans ||
|
||||
call->cong_mode == RXRPC_CALL_SLOW_START ||
|
||||
(call->peer->rtt_usage < 3 && sp->hdr.seq & 1) ||
|
||||
ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000),
|
||||
ktime_get_real())))
|
||||
whdr.flags |= RXRPC_REQUEST_ACK;
|
||||
|
||||
if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) {
|
||||
|
|
|
@ -143,7 +143,7 @@ static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial)
|
|||
if (call->state == RXRPC_CALL_CLIENT_RECV_REPLY) {
|
||||
rxrpc_propose_ACK(call, RXRPC_ACK_IDLE, 0, serial, true, false,
|
||||
rxrpc_propose_ack_terminal_ack);
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ACK);
|
||||
rxrpc_send_ack_packet(call, false);
|
||||
}
|
||||
|
||||
write_lock_bh(&call->state_lock);
|
||||
|
@ -151,17 +151,21 @@ static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial)
|
|||
switch (call->state) {
|
||||
case RXRPC_CALL_CLIENT_RECV_REPLY:
|
||||
__rxrpc_call_completed(call);
|
||||
write_unlock_bh(&call->state_lock);
|
||||
break;
|
||||
|
||||
case RXRPC_CALL_SERVER_RECV_REQUEST:
|
||||
call->tx_phase = true;
|
||||
call->state = RXRPC_CALL_SERVER_ACK_REQUEST;
|
||||
call->ack_at = call->expire_at;
|
||||
write_unlock_bh(&call->state_lock);
|
||||
rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, 0, serial, false, true,
|
||||
rxrpc_propose_ack_processing_op);
|
||||
break;
|
||||
default:
|
||||
write_unlock_bh(&call->state_lock);
|
||||
break;
|
||||
}
|
||||
|
||||
write_unlock_bh(&call->state_lock);
|
||||
}
|
||||
|
||||
/*
|
||||
|
@ -212,7 +216,7 @@ static void rxrpc_rotate_rx_window(struct rxrpc_call *call)
|
|||
true, false,
|
||||
rxrpc_propose_ack_rotate_rx);
|
||||
if (call->ackr_reason)
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ACK);
|
||||
rxrpc_send_ack_packet(call, false);
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -652,7 +656,7 @@ int rxrpc_kernel_recv_data(struct socket *sock, struct rxrpc_call *call,
|
|||
goto out;
|
||||
call_complete:
|
||||
*_abort = call->abort_code;
|
||||
ret = call->error;
|
||||
ret = -call->error;
|
||||
if (call->completion == RXRPC_CALL_SUCCEEDED) {
|
||||
ret = 1;
|
||||
if (size > 0)
|
||||
|
|
|
@ -381,7 +381,7 @@ static int rxkad_verify_packet_1(struct rxrpc_call *call, struct sk_buff *skb,
|
|||
return 0;
|
||||
|
||||
protocol_error:
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
|
||||
rxrpc_send_abort_packet(call);
|
||||
_leave(" = -EPROTO");
|
||||
return -EPROTO;
|
||||
|
||||
|
@ -471,7 +471,7 @@ static int rxkad_verify_packet_2(struct rxrpc_call *call, struct sk_buff *skb,
|
|||
return 0;
|
||||
|
||||
protocol_error:
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
|
||||
rxrpc_send_abort_packet(call);
|
||||
_leave(" = -EPROTO");
|
||||
return -EPROTO;
|
||||
|
||||
|
@ -523,7 +523,7 @@ static int rxkad_verify_packet(struct rxrpc_call *call, struct sk_buff *skb,
|
|||
|
||||
if (cksum != expected_cksum) {
|
||||
rxrpc_abort_call("VCK", call, seq, RXKADSEALEDINCON, EPROTO);
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
|
||||
rxrpc_send_abort_packet(call);
|
||||
_leave(" = -EPROTO [csum failed]");
|
||||
return -EPROTO;
|
||||
}
|
||||
|
|
|
@ -130,6 +130,11 @@ static void rxrpc_queue_packet(struct rxrpc_call *call, struct sk_buff *skb,
|
|||
break;
|
||||
case RXRPC_CALL_SERVER_ACK_REQUEST:
|
||||
call->state = RXRPC_CALL_SERVER_SEND_REPLY;
|
||||
call->ack_at = call->expire_at;
|
||||
if (call->ackr_reason == RXRPC_ACK_DELAY)
|
||||
call->ackr_reason = 0;
|
||||
__rxrpc_set_timer(call, rxrpc_timer_init_for_send_reply,
|
||||
ktime_get_real());
|
||||
if (!last)
|
||||
break;
|
||||
case RXRPC_CALL_SERVER_SEND_REPLY:
|
||||
|
@ -197,7 +202,7 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
|
|||
do {
|
||||
/* Check to see if there's a ping ACK to reply to. */
|
||||
if (call->ackr_reason == RXRPC_ACK_PING_RESPONSE)
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ACK);
|
||||
rxrpc_send_ack_packet(call, false);
|
||||
|
||||
if (!skb) {
|
||||
size_t size, chunk, max, space;
|
||||
|
@ -514,8 +519,7 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
|
|||
} else if (cmd == RXRPC_CMD_SEND_ABORT) {
|
||||
ret = 0;
|
||||
if (rxrpc_abort_call("CMD", call, 0, abort_code, ECONNABORTED))
|
||||
ret = rxrpc_send_call_packet(call,
|
||||
RXRPC_PACKET_TYPE_ABORT);
|
||||
ret = rxrpc_send_abort_packet(call);
|
||||
} else if (cmd != RXRPC_CMD_SEND_DATA) {
|
||||
ret = -EINVAL;
|
||||
} else if (rxrpc_is_client_call(call) &&
|
||||
|
@ -597,7 +601,7 @@ void rxrpc_kernel_abort_call(struct socket *sock, struct rxrpc_call *call,
|
|||
lock_sock(sock->sk);
|
||||
|
||||
if (rxrpc_abort_call(why, call, 0, abort_code, error))
|
||||
rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
|
||||
rxrpc_send_abort_packet(call);
|
||||
|
||||
release_sock(sock->sk);
|
||||
_leave("");
|
||||
|
|
Loading…
Reference in a new issue