18c3e34a4SDavid Howells /* connection-level event handling 28c3e34a4SDavid Howells * 38c3e34a4SDavid Howells * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 48c3e34a4SDavid Howells * Written by David Howells (dhowells@redhat.com) 58c3e34a4SDavid Howells * 68c3e34a4SDavid Howells * This program is free software; you can redistribute it and/or 78c3e34a4SDavid Howells * modify it under the terms of the GNU General Public License 88c3e34a4SDavid Howells * as published by the Free Software Foundation; either version 98c3e34a4SDavid Howells * 2 of the License, or (at your option) any later version. 108c3e34a4SDavid Howells */ 118c3e34a4SDavid Howells 128c3e34a4SDavid Howells #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 138c3e34a4SDavid Howells 148c3e34a4SDavid Howells #include <linux/module.h> 158c3e34a4SDavid Howells #include <linux/net.h> 168c3e34a4SDavid Howells #include <linux/skbuff.h> 178c3e34a4SDavid Howells #include <linux/errqueue.h> 188c3e34a4SDavid Howells #include <net/sock.h> 198c3e34a4SDavid Howells #include <net/af_rxrpc.h> 208c3e34a4SDavid Howells #include <net/ip.h> 218c3e34a4SDavid Howells #include "ar-internal.h" 228c3e34a4SDavid Howells 238c3e34a4SDavid Howells /* 2418bfeba5SDavid Howells * Retransmit terminal ACK or ABORT of the previous call. 2518bfeba5SDavid Howells */ 26f5c17aaeSDavid Howells static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, 273136ef49SDavid Howells struct sk_buff *skb, 283136ef49SDavid Howells unsigned int channel) 2918bfeba5SDavid Howells { 303136ef49SDavid Howells struct rxrpc_skb_priv *sp = skb ? rxrpc_skb(skb) : NULL; 3118bfeba5SDavid Howells struct rxrpc_channel *chan; 3218bfeba5SDavid Howells struct msghdr msg; 3318bfeba5SDavid Howells struct kvec iov; 3418bfeba5SDavid Howells struct { 3518bfeba5SDavid Howells struct rxrpc_wire_header whdr; 3618bfeba5SDavid Howells union { 3718bfeba5SDavid Howells struct { 3818bfeba5SDavid Howells __be32 code; 3918bfeba5SDavid Howells } abort; 4018bfeba5SDavid Howells struct { 4118bfeba5SDavid Howells struct rxrpc_ackpacket ack; 422266ffdeSDavid Howells u8 padding[3]; 4318bfeba5SDavid Howells struct rxrpc_ackinfo info; 4418bfeba5SDavid Howells }; 4518bfeba5SDavid Howells }; 4618bfeba5SDavid Howells } __attribute__((packed)) pkt; 4718bfeba5SDavid Howells size_t len; 4818bfeba5SDavid Howells u32 serial, mtu, call_id; 4918bfeba5SDavid Howells 5018bfeba5SDavid Howells _enter("%d", conn->debug_id); 5118bfeba5SDavid Howells 523136ef49SDavid Howells chan = &conn->channels[channel]; 5318bfeba5SDavid Howells 5418bfeba5SDavid Howells /* If the last call got moved on whilst we were waiting to run, just 5518bfeba5SDavid Howells * ignore this packet. 5618bfeba5SDavid Howells */ 5718bfeba5SDavid Howells call_id = READ_ONCE(chan->last_call); 5818bfeba5SDavid Howells /* Sync with __rxrpc_disconnect_call() */ 5918bfeba5SDavid Howells smp_rmb(); 603136ef49SDavid Howells if (skb && call_id != sp->hdr.callNumber) 6118bfeba5SDavid Howells return; 6218bfeba5SDavid Howells 6318bfeba5SDavid Howells msg.msg_name = &conn->params.peer->srx.transport; 6418bfeba5SDavid Howells msg.msg_namelen = conn->params.peer->srx.transport_len; 6518bfeba5SDavid Howells msg.msg_control = NULL; 6618bfeba5SDavid Howells msg.msg_controllen = 0; 6718bfeba5SDavid Howells msg.msg_flags = 0; 6818bfeba5SDavid Howells 693136ef49SDavid Howells pkt.whdr.epoch = htonl(conn->proto.epoch); 703136ef49SDavid Howells pkt.whdr.cid = htonl(conn->proto.cid); 713136ef49SDavid Howells pkt.whdr.callNumber = htonl(call_id); 7218bfeba5SDavid Howells pkt.whdr.seq = 0; 7318bfeba5SDavid Howells pkt.whdr.type = chan->last_type; 7418bfeba5SDavid Howells pkt.whdr.flags = conn->out_clientflag; 7518bfeba5SDavid Howells pkt.whdr.userStatus = 0; 7618bfeba5SDavid Howells pkt.whdr.securityIndex = conn->security_ix; 7718bfeba5SDavid Howells pkt.whdr._rsvd = 0; 7868d6d1aeSDavid Howells pkt.whdr.serviceId = htons(conn->service_id); 7918bfeba5SDavid Howells 8018bfeba5SDavid Howells len = sizeof(pkt.whdr); 8118bfeba5SDavid Howells switch (chan->last_type) { 8218bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ABORT: 8318bfeba5SDavid Howells pkt.abort.code = htonl(chan->last_abort); 8418bfeba5SDavid Howells len += sizeof(pkt.abort); 8518bfeba5SDavid Howells break; 8618bfeba5SDavid Howells 8718bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ACK: 8818bfeba5SDavid Howells mtu = conn->params.peer->if_mtu; 8918bfeba5SDavid Howells mtu -= conn->params.peer->hdrsize; 9018bfeba5SDavid Howells pkt.ack.bufferSpace = 0; 913136ef49SDavid Howells pkt.ack.maxSkew = htons(skb ? skb->priority : 0); 923136ef49SDavid Howells pkt.ack.firstPacket = htonl(chan->last_seq + 1); 933136ef49SDavid Howells pkt.ack.previousPacket = htonl(chan->last_seq); 943136ef49SDavid Howells pkt.ack.serial = htonl(skb ? sp->hdr.serial : 0); 953136ef49SDavid Howells pkt.ack.reason = skb ? RXRPC_ACK_DUPLICATE : RXRPC_ACK_IDLE; 9618bfeba5SDavid Howells pkt.ack.nAcks = 0; 9718bfeba5SDavid Howells pkt.info.rxMTU = htonl(rxrpc_rx_mtu); 9818bfeba5SDavid Howells pkt.info.maxMTU = htonl(mtu); 9918bfeba5SDavid Howells pkt.info.rwind = htonl(rxrpc_rx_window_size); 10018bfeba5SDavid Howells pkt.info.jumbo_max = htonl(rxrpc_rx_jumbo_max); 10157494343SDavid Howells pkt.whdr.flags |= RXRPC_SLOW_START_OK; 10218bfeba5SDavid Howells len += sizeof(pkt.ack) + sizeof(pkt.info); 10318bfeba5SDavid Howells break; 10418bfeba5SDavid Howells } 10518bfeba5SDavid Howells 10618bfeba5SDavid Howells /* Resync with __rxrpc_disconnect_call() and check that the last call 10718bfeba5SDavid Howells * didn't get advanced whilst we were filling out the packets. 10818bfeba5SDavid Howells */ 10918bfeba5SDavid Howells smp_rmb(); 11018bfeba5SDavid Howells if (READ_ONCE(chan->last_call) != call_id) 11118bfeba5SDavid Howells return; 11218bfeba5SDavid Howells 11318bfeba5SDavid Howells iov.iov_base = &pkt; 11418bfeba5SDavid Howells iov.iov_len = len; 11518bfeba5SDavid Howells 11618bfeba5SDavid Howells serial = atomic_inc_return(&conn->serial); 11718bfeba5SDavid Howells pkt.whdr.serial = htonl(serial); 11818bfeba5SDavid Howells 11918bfeba5SDavid Howells switch (chan->last_type) { 12018bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ABORT: 12118bfeba5SDavid Howells _proto("Tx ABORT %%%u { %d } [re]", serial, conn->local_abort); 12218bfeba5SDavid Howells break; 12318bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ACK: 124be832aecSDavid Howells trace_rxrpc_tx_ack(NULL, serial, chan->last_seq, 0, 125be832aecSDavid Howells RXRPC_ACK_DUPLICATE, 0); 12618bfeba5SDavid Howells _proto("Tx ACK %%%u [re]", serial); 12718bfeba5SDavid Howells break; 12818bfeba5SDavid Howells } 12918bfeba5SDavid Howells 13018bfeba5SDavid Howells kernel_sendmsg(conn->params.local->socket, &msg, &iov, 1, len); 13118bfeba5SDavid Howells _leave(""); 13218bfeba5SDavid Howells return; 13318bfeba5SDavid Howells } 13418bfeba5SDavid Howells 13518bfeba5SDavid Howells /* 1368c3e34a4SDavid Howells * pass a connection-level abort onto all calls on that connection 1378c3e34a4SDavid Howells */ 138f5c17aaeSDavid Howells static void rxrpc_abort_calls(struct rxrpc_connection *conn, 139f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 140f5c17aaeSDavid Howells u32 abort_code, int error) 1418c3e34a4SDavid Howells { 1428c3e34a4SDavid Howells struct rxrpc_call *call; 143248f219cSDavid Howells int i; 1448c3e34a4SDavid Howells 1458c3e34a4SDavid Howells _enter("{%d},%x", conn->debug_id, abort_code); 1468c3e34a4SDavid Howells 147a1399f8bSDavid Howells spin_lock(&conn->channel_lock); 1488c3e34a4SDavid Howells 149a1399f8bSDavid Howells for (i = 0; i < RXRPC_MAXCALLS; i++) { 150a1399f8bSDavid Howells call = rcu_dereference_protected( 151a1399f8bSDavid Howells conn->channels[i].call, 152a1399f8bSDavid Howells lockdep_is_held(&conn->channel_lock)); 153ccbd3dbeSDavid Howells if (call) { 1545a42976dSDavid Howells if (compl == RXRPC_CALL_LOCALLY_ABORTED) 1555a42976dSDavid Howells trace_rxrpc_abort("CON", call->cid, 1565a42976dSDavid Howells call->call_id, 0, 1575a42976dSDavid Howells abort_code, error); 158248f219cSDavid Howells if (rxrpc_set_call_completion(call, compl, 159248f219cSDavid Howells abort_code, error)) 160248f219cSDavid Howells rxrpc_notify_socket(call); 1618c3e34a4SDavid Howells } 162ccbd3dbeSDavid Howells } 1638c3e34a4SDavid Howells 164a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 1658c3e34a4SDavid Howells _leave(""); 1668c3e34a4SDavid Howells } 1678c3e34a4SDavid Howells 1688c3e34a4SDavid Howells /* 1698c3e34a4SDavid Howells * generate a connection-level abort 1708c3e34a4SDavid Howells */ 1718c3e34a4SDavid Howells static int rxrpc_abort_connection(struct rxrpc_connection *conn, 1723a92789aSDavid Howells int error, u32 abort_code) 1738c3e34a4SDavid Howells { 1748c3e34a4SDavid Howells struct rxrpc_wire_header whdr; 1758c3e34a4SDavid Howells struct msghdr msg; 1768c3e34a4SDavid Howells struct kvec iov[2]; 1778c3e34a4SDavid Howells __be32 word; 1788c3e34a4SDavid Howells size_t len; 1798c3e34a4SDavid Howells u32 serial; 1808c3e34a4SDavid Howells int ret; 1818c3e34a4SDavid Howells 1828c3e34a4SDavid Howells _enter("%d,,%u,%u", conn->debug_id, error, abort_code); 1838c3e34a4SDavid Howells 1848c3e34a4SDavid Howells /* generate a connection-level abort */ 1858c3e34a4SDavid Howells spin_lock_bh(&conn->state_lock); 186f5c17aaeSDavid Howells if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { 1878c3e34a4SDavid Howells spin_unlock_bh(&conn->state_lock); 1888c3e34a4SDavid Howells _leave(" = 0 [already dead]"); 1898c3e34a4SDavid Howells return 0; 1908c3e34a4SDavid Howells } 1918c3e34a4SDavid Howells 192f5c17aaeSDavid Howells conn->state = RXRPC_CONN_LOCALLY_ABORTED; 193f5c17aaeSDavid Howells spin_unlock_bh(&conn->state_lock); 194f5c17aaeSDavid Howells 195f5c17aaeSDavid Howells rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code, error); 1968c3e34a4SDavid Howells 19785f32278SDavid Howells msg.msg_name = &conn->params.peer->srx.transport; 19885f32278SDavid Howells msg.msg_namelen = conn->params.peer->srx.transport_len; 1998c3e34a4SDavid Howells msg.msg_control = NULL; 2008c3e34a4SDavid Howells msg.msg_controllen = 0; 2018c3e34a4SDavid Howells msg.msg_flags = 0; 2028c3e34a4SDavid Howells 20319ffa01cSDavid Howells whdr.epoch = htonl(conn->proto.epoch); 20419ffa01cSDavid Howells whdr.cid = htonl(conn->proto.cid); 2058c3e34a4SDavid Howells whdr.callNumber = 0; 2068c3e34a4SDavid Howells whdr.seq = 0; 2078c3e34a4SDavid Howells whdr.type = RXRPC_PACKET_TYPE_ABORT; 2088c3e34a4SDavid Howells whdr.flags = conn->out_clientflag; 2098c3e34a4SDavid Howells whdr.userStatus = 0; 2108c3e34a4SDavid Howells whdr.securityIndex = conn->security_ix; 2118c3e34a4SDavid Howells whdr._rsvd = 0; 21268d6d1aeSDavid Howells whdr.serviceId = htons(conn->service_id); 2138c3e34a4SDavid Howells 2148c3e34a4SDavid Howells word = htonl(conn->local_abort); 2158c3e34a4SDavid Howells 2168c3e34a4SDavid Howells iov[0].iov_base = &whdr; 2178c3e34a4SDavid Howells iov[0].iov_len = sizeof(whdr); 2188c3e34a4SDavid Howells iov[1].iov_base = &word; 2198c3e34a4SDavid Howells iov[1].iov_len = sizeof(word); 2208c3e34a4SDavid Howells 2218c3e34a4SDavid Howells len = iov[0].iov_len + iov[1].iov_len; 2228c3e34a4SDavid Howells 2238c3e34a4SDavid Howells serial = atomic_inc_return(&conn->serial); 2248c3e34a4SDavid Howells whdr.serial = htonl(serial); 2258c3e34a4SDavid Howells _proto("Tx CONN ABORT %%%u { %d }", serial, conn->local_abort); 2268c3e34a4SDavid Howells 22785f32278SDavid Howells ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len); 2288c3e34a4SDavid Howells if (ret < 0) { 2298c3e34a4SDavid Howells _debug("sendmsg failed: %d", ret); 2308c3e34a4SDavid Howells return -EAGAIN; 2318c3e34a4SDavid Howells } 2328c3e34a4SDavid Howells 2338c3e34a4SDavid Howells _leave(" = 0"); 2348c3e34a4SDavid Howells return 0; 2358c3e34a4SDavid Howells } 2368c3e34a4SDavid Howells 2378c3e34a4SDavid Howells /* 2388c3e34a4SDavid Howells * mark a call as being on a now-secured channel 239248f219cSDavid Howells * - must be called with BH's disabled. 2408c3e34a4SDavid Howells */ 2418c3e34a4SDavid Howells static void rxrpc_call_is_secure(struct rxrpc_call *call) 2428c3e34a4SDavid Howells { 2438c3e34a4SDavid Howells _enter("%p", call); 2448c3e34a4SDavid Howells if (call) { 245248f219cSDavid Howells write_lock_bh(&call->state_lock); 246248f219cSDavid Howells if (call->state == RXRPC_CALL_SERVER_SECURING) { 247248f219cSDavid Howells call->state = RXRPC_CALL_SERVER_ACCEPTING; 248248f219cSDavid Howells rxrpc_notify_socket(call); 249248f219cSDavid Howells } 250248f219cSDavid Howells write_unlock_bh(&call->state_lock); 2518c3e34a4SDavid Howells } 2528c3e34a4SDavid Howells } 2538c3e34a4SDavid Howells 2548c3e34a4SDavid Howells /* 2558c3e34a4SDavid Howells * connection-level Rx packet processor 2568c3e34a4SDavid Howells */ 2578c3e34a4SDavid Howells static int rxrpc_process_event(struct rxrpc_connection *conn, 2588c3e34a4SDavid Howells struct sk_buff *skb, 2598c3e34a4SDavid Howells u32 *_abort_code) 2608c3e34a4SDavid Howells { 2618c3e34a4SDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 2628c3e34a4SDavid Howells __be32 wtmp; 2638c3e34a4SDavid Howells u32 abort_code; 2648c3e34a4SDavid Howells int loop, ret; 2658c3e34a4SDavid Howells 2668c3e34a4SDavid Howells if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { 267248f219cSDavid Howells _leave(" = -ECONNABORTED [%u]", conn->state); 2688c3e34a4SDavid Howells return -ECONNABORTED; 2698c3e34a4SDavid Howells } 2708c3e34a4SDavid Howells 2718c3e34a4SDavid Howells _enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial); 2728c3e34a4SDavid Howells 2738c3e34a4SDavid Howells switch (sp->hdr.type) { 27418bfeba5SDavid Howells case RXRPC_PACKET_TYPE_DATA: 27518bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ACK: 2763136ef49SDavid Howells rxrpc_conn_retransmit_call(conn, skb, 2773136ef49SDavid Howells sp->hdr.cid & RXRPC_CHANNELMASK); 27818bfeba5SDavid Howells return 0; 27918bfeba5SDavid Howells 2804d4a6ac7SDavid Howells case RXRPC_PACKET_TYPE_BUSY: 2814d4a6ac7SDavid Howells /* Just ignore BUSY packets for now. */ 2824d4a6ac7SDavid Howells return 0; 2834d4a6ac7SDavid Howells 2848c3e34a4SDavid Howells case RXRPC_PACKET_TYPE_ABORT: 285775e5b71SDavid Howells if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), 286fb46f6eeSDavid Howells &wtmp, sizeof(wtmp)) < 0) { 287fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 288fb46f6eeSDavid Howells tracepoint_string("bad_abort")); 2898c3e34a4SDavid Howells return -EPROTO; 290fb46f6eeSDavid Howells } 2918c3e34a4SDavid Howells abort_code = ntohl(wtmp); 2928c3e34a4SDavid Howells _proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code); 2938c3e34a4SDavid Howells 2948c3e34a4SDavid Howells conn->state = RXRPC_CONN_REMOTELY_ABORTED; 295248f219cSDavid Howells rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED, 2963a92789aSDavid Howells abort_code, -ECONNABORTED); 2978c3e34a4SDavid Howells return -ECONNABORTED; 2988c3e34a4SDavid Howells 2998c3e34a4SDavid Howells case RXRPC_PACKET_TYPE_CHALLENGE: 3008c3e34a4SDavid Howells return conn->security->respond_to_challenge(conn, skb, 3018c3e34a4SDavid Howells _abort_code); 3028c3e34a4SDavid Howells 3038c3e34a4SDavid Howells case RXRPC_PACKET_TYPE_RESPONSE: 3048c3e34a4SDavid Howells ret = conn->security->verify_response(conn, skb, _abort_code); 3058c3e34a4SDavid Howells if (ret < 0) 3068c3e34a4SDavid Howells return ret; 3078c3e34a4SDavid Howells 3088c3e34a4SDavid Howells ret = conn->security->init_connection_security(conn); 3098c3e34a4SDavid Howells if (ret < 0) 3108c3e34a4SDavid Howells return ret; 3118c3e34a4SDavid Howells 312a263629dSHerbert Xu ret = conn->security->prime_packet_security(conn); 313a263629dSHerbert Xu if (ret < 0) 314a263629dSHerbert Xu return ret; 315a263629dSHerbert Xu 316a1399f8bSDavid Howells spin_lock(&conn->channel_lock); 3178c3e34a4SDavid Howells spin_lock(&conn->state_lock); 3188c3e34a4SDavid Howells 319bba304dbSDavid Howells if (conn->state == RXRPC_CONN_SERVICE_CHALLENGING) { 320bba304dbSDavid Howells conn->state = RXRPC_CONN_SERVICE; 321248f219cSDavid Howells spin_unlock(&conn->state_lock); 3228c3e34a4SDavid Howells for (loop = 0; loop < RXRPC_MAXCALLS; loop++) 323dee46364SDavid Howells rxrpc_call_is_secure( 324dee46364SDavid Howells rcu_dereference_protected( 325a1399f8bSDavid Howells conn->channels[loop].call, 326a1399f8bSDavid Howells lockdep_is_held(&conn->channel_lock))); 327248f219cSDavid Howells } else { 328248f219cSDavid Howells spin_unlock(&conn->state_lock); 3298c3e34a4SDavid Howells } 3308c3e34a4SDavid Howells 331a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3328c3e34a4SDavid Howells return 0; 3338c3e34a4SDavid Howells 3348c3e34a4SDavid Howells default: 335fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 336fb46f6eeSDavid Howells tracepoint_string("bad_conn_pkt")); 3378c3e34a4SDavid Howells return -EPROTO; 3388c3e34a4SDavid Howells } 3398c3e34a4SDavid Howells } 3408c3e34a4SDavid Howells 3418c3e34a4SDavid Howells /* 3428c3e34a4SDavid Howells * set up security and issue a challenge 3438c3e34a4SDavid Howells */ 3448c3e34a4SDavid Howells static void rxrpc_secure_connection(struct rxrpc_connection *conn) 3458c3e34a4SDavid Howells { 3468c3e34a4SDavid Howells u32 abort_code; 3478c3e34a4SDavid Howells int ret; 3488c3e34a4SDavid Howells 3498c3e34a4SDavid Howells _enter("{%d}", conn->debug_id); 3508c3e34a4SDavid Howells 3518c3e34a4SDavid Howells ASSERT(conn->security_ix != 0); 3528c3e34a4SDavid Howells 35319ffa01cSDavid Howells if (!conn->params.key) { 3548c3e34a4SDavid Howells _debug("set up security"); 3558c3e34a4SDavid Howells ret = rxrpc_init_server_conn_security(conn); 3568c3e34a4SDavid Howells switch (ret) { 3578c3e34a4SDavid Howells case 0: 3588c3e34a4SDavid Howells break; 3598c3e34a4SDavid Howells case -ENOENT: 3608c3e34a4SDavid Howells abort_code = RX_CALL_DEAD; 3618c3e34a4SDavid Howells goto abort; 3628c3e34a4SDavid Howells default: 3638c3e34a4SDavid Howells abort_code = RXKADNOAUTH; 3648c3e34a4SDavid Howells goto abort; 3658c3e34a4SDavid Howells } 3668c3e34a4SDavid Howells } 3678c3e34a4SDavid Howells 3688c3e34a4SDavid Howells if (conn->security->issue_challenge(conn) < 0) { 3698c3e34a4SDavid Howells abort_code = RX_CALL_DEAD; 3708c3e34a4SDavid Howells ret = -ENOMEM; 3718c3e34a4SDavid Howells goto abort; 3728c3e34a4SDavid Howells } 3738c3e34a4SDavid Howells 3748c3e34a4SDavid Howells _leave(""); 3758c3e34a4SDavid Howells return; 3768c3e34a4SDavid Howells 3778c3e34a4SDavid Howells abort: 3788c3e34a4SDavid Howells _debug("abort %d, %d", ret, abort_code); 3793a92789aSDavid Howells rxrpc_abort_connection(conn, ret, abort_code); 3808c3e34a4SDavid Howells _leave(" [aborted]"); 3818c3e34a4SDavid Howells } 3828c3e34a4SDavid Howells 3838c3e34a4SDavid Howells /* 3843136ef49SDavid Howells * Process delayed final ACKs that we haven't subsumed into a subsequent call. 3853136ef49SDavid Howells */ 3863136ef49SDavid Howells static void rxrpc_process_delayed_final_acks(struct rxrpc_connection *conn) 3873136ef49SDavid Howells { 3883136ef49SDavid Howells unsigned long j = jiffies, next_j; 3893136ef49SDavid Howells unsigned int channel; 3903136ef49SDavid Howells bool set; 3913136ef49SDavid Howells 3923136ef49SDavid Howells again: 3933136ef49SDavid Howells next_j = j + LONG_MAX; 3943136ef49SDavid Howells set = false; 3953136ef49SDavid Howells for (channel = 0; channel < RXRPC_MAXCALLS; channel++) { 3963136ef49SDavid Howells struct rxrpc_channel *chan = &conn->channels[channel]; 3973136ef49SDavid Howells unsigned long ack_at; 3983136ef49SDavid Howells 3993136ef49SDavid Howells if (!test_bit(RXRPC_CONN_FINAL_ACK_0 + channel, &conn->flags)) 4003136ef49SDavid Howells continue; 4013136ef49SDavid Howells 4023136ef49SDavid Howells smp_rmb(); /* vs rxrpc_disconnect_client_call */ 4033136ef49SDavid Howells ack_at = READ_ONCE(chan->final_ack_at); 4043136ef49SDavid Howells 4053136ef49SDavid Howells if (time_before(j, ack_at)) { 4063136ef49SDavid Howells if (time_before(ack_at, next_j)) { 4073136ef49SDavid Howells next_j = ack_at; 4083136ef49SDavid Howells set = true; 4093136ef49SDavid Howells } 4103136ef49SDavid Howells continue; 4113136ef49SDavid Howells } 4123136ef49SDavid Howells 4133136ef49SDavid Howells if (test_and_clear_bit(RXRPC_CONN_FINAL_ACK_0 + channel, 4143136ef49SDavid Howells &conn->flags)) 4153136ef49SDavid Howells rxrpc_conn_retransmit_call(conn, NULL, channel); 4163136ef49SDavid Howells } 4173136ef49SDavid Howells 4183136ef49SDavid Howells j = jiffies; 4193136ef49SDavid Howells if (time_before_eq(next_j, j)) 4203136ef49SDavid Howells goto again; 4213136ef49SDavid Howells if (set) 4223136ef49SDavid Howells rxrpc_reduce_conn_timer(conn, next_j); 4233136ef49SDavid Howells } 4243136ef49SDavid Howells 4253136ef49SDavid Howells /* 4268c3e34a4SDavid Howells * connection-level event processor 4278c3e34a4SDavid Howells */ 4288c3e34a4SDavid Howells void rxrpc_process_connection(struct work_struct *work) 4298c3e34a4SDavid Howells { 4308c3e34a4SDavid Howells struct rxrpc_connection *conn = 4318c3e34a4SDavid Howells container_of(work, struct rxrpc_connection, processor); 4328c3e34a4SDavid Howells struct sk_buff *skb; 4338c3e34a4SDavid Howells u32 abort_code = RX_PROTOCOL_ERROR; 4348c3e34a4SDavid Howells int ret; 4358c3e34a4SDavid Howells 436363deeabSDavid Howells rxrpc_see_connection(conn); 4378c3e34a4SDavid Howells 4382c4579e4SDavid Howells if (test_and_clear_bit(RXRPC_CONN_EV_CHALLENGE, &conn->events)) 4398c3e34a4SDavid Howells rxrpc_secure_connection(conn); 4408c3e34a4SDavid Howells 4413136ef49SDavid Howells /* Process delayed ACKs whose time has come. */ 4423136ef49SDavid Howells if (conn->flags & RXRPC_CONN_FINAL_ACK_MASK) 4433136ef49SDavid Howells rxrpc_process_delayed_final_acks(conn); 4443136ef49SDavid Howells 4458c3e34a4SDavid Howells /* go through the conn-level event packets, releasing the ref on this 4468c3e34a4SDavid Howells * connection that each one has when we've finished with it */ 4478c3e34a4SDavid Howells while ((skb = skb_dequeue(&conn->rx_queue))) { 44871f3ca40SDavid Howells rxrpc_see_skb(skb, rxrpc_skb_rx_seen); 4498c3e34a4SDavid Howells ret = rxrpc_process_event(conn, skb, &abort_code); 4508c3e34a4SDavid Howells switch (ret) { 4518c3e34a4SDavid Howells case -EPROTO: 4528c3e34a4SDavid Howells case -EKEYEXPIRED: 4538c3e34a4SDavid Howells case -EKEYREJECTED: 4548c3e34a4SDavid Howells goto protocol_error; 4558c3e34a4SDavid Howells case -EAGAIN: 4568c3e34a4SDavid Howells goto requeue_and_leave; 4578c3e34a4SDavid Howells case -ECONNABORTED: 4588c3e34a4SDavid Howells default: 45971f3ca40SDavid Howells rxrpc_free_skb(skb, rxrpc_skb_rx_freed); 4608c3e34a4SDavid Howells break; 4618c3e34a4SDavid Howells } 4628c3e34a4SDavid Howells } 4638c3e34a4SDavid Howells 4648c3e34a4SDavid Howells out: 4658c3e34a4SDavid Howells rxrpc_put_connection(conn); 4668c3e34a4SDavid Howells _leave(""); 4678c3e34a4SDavid Howells return; 4688c3e34a4SDavid Howells 4698c3e34a4SDavid Howells requeue_and_leave: 4708c3e34a4SDavid Howells skb_queue_head(&conn->rx_queue, skb); 4718c3e34a4SDavid Howells goto out; 4728c3e34a4SDavid Howells 4738c3e34a4SDavid Howells protocol_error: 4743a92789aSDavid Howells if (rxrpc_abort_connection(conn, ret, abort_code) < 0) 4758c3e34a4SDavid Howells goto requeue_and_leave; 47671f3ca40SDavid Howells rxrpc_free_skb(skb, rxrpc_skb_rx_freed); 4778c3e34a4SDavid Howells goto out; 4788c3e34a4SDavid Howells } 479