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; 335fc62f6aSDavid Howells struct kvec iov[3]; 3418bfeba5SDavid Howells struct { 3518bfeba5SDavid Howells struct rxrpc_wire_header whdr; 3618bfeba5SDavid Howells union { 375fc62f6aSDavid Howells __be32 abort_code; 3818bfeba5SDavid Howells struct rxrpc_ackpacket ack; 3918bfeba5SDavid Howells }; 4018bfeba5SDavid Howells } __attribute__((packed)) pkt; 415fc62f6aSDavid Howells struct rxrpc_ackinfo ack_info; 4218bfeba5SDavid Howells size_t len; 436b47fe1dSDavid Howells int ret, ioc; 445fc62f6aSDavid Howells u32 serial, mtu, call_id, padding; 4518bfeba5SDavid Howells 4618bfeba5SDavid Howells _enter("%d", conn->debug_id); 4718bfeba5SDavid Howells 483136ef49SDavid Howells chan = &conn->channels[channel]; 4918bfeba5SDavid Howells 5018bfeba5SDavid Howells /* If the last call got moved on whilst we were waiting to run, just 5118bfeba5SDavid Howells * ignore this packet. 5218bfeba5SDavid Howells */ 5318bfeba5SDavid Howells call_id = READ_ONCE(chan->last_call); 5418bfeba5SDavid Howells /* Sync with __rxrpc_disconnect_call() */ 5518bfeba5SDavid Howells smp_rmb(); 563136ef49SDavid Howells if (skb && call_id != sp->hdr.callNumber) 5718bfeba5SDavid Howells return; 5818bfeba5SDavid Howells 5918bfeba5SDavid Howells msg.msg_name = &conn->params.peer->srx.transport; 6018bfeba5SDavid Howells msg.msg_namelen = conn->params.peer->srx.transport_len; 6118bfeba5SDavid Howells msg.msg_control = NULL; 6218bfeba5SDavid Howells msg.msg_controllen = 0; 6318bfeba5SDavid Howells msg.msg_flags = 0; 6418bfeba5SDavid Howells 655fc62f6aSDavid Howells iov[0].iov_base = &pkt; 665fc62f6aSDavid Howells iov[0].iov_len = sizeof(pkt.whdr); 675fc62f6aSDavid Howells iov[1].iov_base = &padding; 685fc62f6aSDavid Howells iov[1].iov_len = 3; 695fc62f6aSDavid Howells iov[2].iov_base = &ack_info; 705fc62f6aSDavid Howells iov[2].iov_len = sizeof(ack_info); 715fc62f6aSDavid Howells 723136ef49SDavid Howells pkt.whdr.epoch = htonl(conn->proto.epoch); 73fb1967a6SDavid Howells pkt.whdr.cid = htonl(conn->proto.cid | channel); 743136ef49SDavid Howells pkt.whdr.callNumber = htonl(call_id); 7518bfeba5SDavid Howells pkt.whdr.seq = 0; 7618bfeba5SDavid Howells pkt.whdr.type = chan->last_type; 7718bfeba5SDavid Howells pkt.whdr.flags = conn->out_clientflag; 7818bfeba5SDavid Howells pkt.whdr.userStatus = 0; 7918bfeba5SDavid Howells pkt.whdr.securityIndex = conn->security_ix; 8018bfeba5SDavid Howells pkt.whdr._rsvd = 0; 8168d6d1aeSDavid Howells pkt.whdr.serviceId = htons(conn->service_id); 8218bfeba5SDavid Howells 8318bfeba5SDavid Howells len = sizeof(pkt.whdr); 8418bfeba5SDavid Howells switch (chan->last_type) { 8518bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ABORT: 865fc62f6aSDavid Howells pkt.abort_code = htonl(chan->last_abort); 875fc62f6aSDavid Howells iov[0].iov_len += sizeof(pkt.abort_code); 885fc62f6aSDavid Howells len += sizeof(pkt.abort_code); 895fc62f6aSDavid Howells ioc = 1; 9018bfeba5SDavid Howells break; 9118bfeba5SDavid Howells 9218bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ACK: 9318bfeba5SDavid Howells mtu = conn->params.peer->if_mtu; 9418bfeba5SDavid Howells mtu -= conn->params.peer->hdrsize; 9518bfeba5SDavid Howells pkt.ack.bufferSpace = 0; 963136ef49SDavid Howells pkt.ack.maxSkew = htons(skb ? skb->priority : 0); 973136ef49SDavid Howells pkt.ack.firstPacket = htonl(chan->last_seq + 1); 983136ef49SDavid Howells pkt.ack.previousPacket = htonl(chan->last_seq); 993136ef49SDavid Howells pkt.ack.serial = htonl(skb ? sp->hdr.serial : 0); 1003136ef49SDavid Howells pkt.ack.reason = skb ? RXRPC_ACK_DUPLICATE : RXRPC_ACK_IDLE; 10118bfeba5SDavid Howells pkt.ack.nAcks = 0; 1025fc62f6aSDavid Howells ack_info.rxMTU = htonl(rxrpc_rx_mtu); 1035fc62f6aSDavid Howells ack_info.maxMTU = htonl(mtu); 1045fc62f6aSDavid Howells ack_info.rwind = htonl(rxrpc_rx_window_size); 1055fc62f6aSDavid Howells ack_info.jumbo_max = htonl(rxrpc_rx_jumbo_max); 10657494343SDavid Howells pkt.whdr.flags |= RXRPC_SLOW_START_OK; 1075fc62f6aSDavid Howells padding = 0; 1085fc62f6aSDavid Howells iov[0].iov_len += sizeof(pkt.ack); 1095fc62f6aSDavid Howells len += sizeof(pkt.ack) + 3 + sizeof(ack_info); 1105fc62f6aSDavid Howells ioc = 3; 11118bfeba5SDavid Howells break; 1125fc62f6aSDavid Howells 1135fc62f6aSDavid Howells default: 1145fc62f6aSDavid Howells return; 11518bfeba5SDavid Howells } 11618bfeba5SDavid Howells 11718bfeba5SDavid Howells /* Resync with __rxrpc_disconnect_call() and check that the last call 11818bfeba5SDavid Howells * didn't get advanced whilst we were filling out the packets. 11918bfeba5SDavid Howells */ 12018bfeba5SDavid Howells smp_rmb(); 12118bfeba5SDavid Howells if (READ_ONCE(chan->last_call) != call_id) 12218bfeba5SDavid Howells return; 12318bfeba5SDavid Howells 12418bfeba5SDavid Howells serial = atomic_inc_return(&conn->serial); 12518bfeba5SDavid Howells pkt.whdr.serial = htonl(serial); 12618bfeba5SDavid Howells 12718bfeba5SDavid Howells switch (chan->last_type) { 12818bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ABORT: 12964753092SDavid Howells _proto("Tx ABORT %%%u { %d } [re]", serial, conn->abort_code); 13018bfeba5SDavid Howells break; 13118bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ACK: 1324764c0daSDavid Howells trace_rxrpc_tx_ack(chan->call_debug_id, serial, 133f3f8337cSDavid Howells ntohl(pkt.ack.firstPacket), 134f3f8337cSDavid Howells ntohl(pkt.ack.serial), 135f3f8337cSDavid Howells pkt.ack.reason, 0); 13618bfeba5SDavid Howells _proto("Tx ACK %%%u [re]", serial); 13718bfeba5SDavid Howells break; 13818bfeba5SDavid Howells } 13918bfeba5SDavid Howells 1406b47fe1dSDavid Howells ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, ioc, len); 141330bdcfaSDavid Howells conn->params.peer->last_tx_at = ktime_get_seconds(); 1426b47fe1dSDavid Howells if (ret < 0) 1434764c0daSDavid Howells trace_rxrpc_tx_fail(chan->call_debug_id, serial, ret, 1444764c0daSDavid Howells rxrpc_tx_point_call_final_resend); 1454764c0daSDavid Howells else 1464764c0daSDavid Howells trace_rxrpc_tx_packet(chan->call_debug_id, &pkt.whdr, 1474764c0daSDavid Howells rxrpc_tx_point_call_final_resend); 1486b47fe1dSDavid Howells 14918bfeba5SDavid Howells _leave(""); 15018bfeba5SDavid Howells } 15118bfeba5SDavid Howells 15218bfeba5SDavid Howells /* 1538c3e34a4SDavid Howells * pass a connection-level abort onto all calls on that connection 1548c3e34a4SDavid Howells */ 155f5c17aaeSDavid Howells static void rxrpc_abort_calls(struct rxrpc_connection *conn, 15664753092SDavid Howells enum rxrpc_call_completion compl) 1578c3e34a4SDavid Howells { 1588c3e34a4SDavid Howells struct rxrpc_call *call; 159248f219cSDavid Howells int i; 1608c3e34a4SDavid Howells 16164753092SDavid Howells _enter("{%d},%x", conn->debug_id, conn->abort_code); 1628c3e34a4SDavid Howells 163a1399f8bSDavid Howells spin_lock(&conn->channel_lock); 1648c3e34a4SDavid Howells 165a1399f8bSDavid Howells for (i = 0; i < RXRPC_MAXCALLS; i++) { 166a1399f8bSDavid Howells call = rcu_dereference_protected( 167a1399f8bSDavid Howells conn->channels[i].call, 168a1399f8bSDavid Howells lockdep_is_held(&conn->channel_lock)); 169ccbd3dbeSDavid Howells if (call) { 1705a42976dSDavid Howells if (compl == RXRPC_CALL_LOCALLY_ABORTED) 171a25e21f0SDavid Howells trace_rxrpc_abort(call->debug_id, 172a25e21f0SDavid Howells "CON", call->cid, 1735a42976dSDavid Howells call->call_id, 0, 17464753092SDavid Howells conn->abort_code, 17564753092SDavid Howells conn->error); 176248f219cSDavid Howells if (rxrpc_set_call_completion(call, compl, 17764753092SDavid Howells conn->abort_code, 17864753092SDavid Howells conn->error)) 179248f219cSDavid Howells rxrpc_notify_socket(call); 1808c3e34a4SDavid Howells } 181ccbd3dbeSDavid Howells } 1828c3e34a4SDavid Howells 183a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 1848c3e34a4SDavid Howells _leave(""); 1858c3e34a4SDavid Howells } 1868c3e34a4SDavid Howells 1878c3e34a4SDavid Howells /* 1888c3e34a4SDavid Howells * generate a connection-level abort 1898c3e34a4SDavid Howells */ 1908c3e34a4SDavid Howells static int rxrpc_abort_connection(struct rxrpc_connection *conn, 1913a92789aSDavid Howells int error, u32 abort_code) 1928c3e34a4SDavid Howells { 1938c3e34a4SDavid Howells struct rxrpc_wire_header whdr; 1948c3e34a4SDavid Howells struct msghdr msg; 1958c3e34a4SDavid Howells struct kvec iov[2]; 1968c3e34a4SDavid Howells __be32 word; 1978c3e34a4SDavid Howells size_t len; 1988c3e34a4SDavid Howells u32 serial; 1998c3e34a4SDavid Howells int ret; 2008c3e34a4SDavid Howells 2018c3e34a4SDavid Howells _enter("%d,,%u,%u", conn->debug_id, error, abort_code); 2028c3e34a4SDavid Howells 2038c3e34a4SDavid Howells /* generate a connection-level abort */ 2048c3e34a4SDavid Howells spin_lock_bh(&conn->state_lock); 205f5c17aaeSDavid Howells if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { 2068c3e34a4SDavid Howells spin_unlock_bh(&conn->state_lock); 2078c3e34a4SDavid Howells _leave(" = 0 [already dead]"); 2088c3e34a4SDavid Howells return 0; 2098c3e34a4SDavid Howells } 2108c3e34a4SDavid Howells 21164753092SDavid Howells conn->error = error; 21264753092SDavid Howells conn->abort_code = abort_code; 213f5c17aaeSDavid Howells conn->state = RXRPC_CONN_LOCALLY_ABORTED; 214f5c17aaeSDavid Howells spin_unlock_bh(&conn->state_lock); 215f5c17aaeSDavid Howells 21664753092SDavid Howells rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED); 2178c3e34a4SDavid Howells 21885f32278SDavid Howells msg.msg_name = &conn->params.peer->srx.transport; 21985f32278SDavid Howells msg.msg_namelen = conn->params.peer->srx.transport_len; 2208c3e34a4SDavid Howells msg.msg_control = NULL; 2218c3e34a4SDavid Howells msg.msg_controllen = 0; 2228c3e34a4SDavid Howells msg.msg_flags = 0; 2238c3e34a4SDavid Howells 22419ffa01cSDavid Howells whdr.epoch = htonl(conn->proto.epoch); 22519ffa01cSDavid Howells whdr.cid = htonl(conn->proto.cid); 2268c3e34a4SDavid Howells whdr.callNumber = 0; 2278c3e34a4SDavid Howells whdr.seq = 0; 2288c3e34a4SDavid Howells whdr.type = RXRPC_PACKET_TYPE_ABORT; 2298c3e34a4SDavid Howells whdr.flags = conn->out_clientflag; 2308c3e34a4SDavid Howells whdr.userStatus = 0; 2318c3e34a4SDavid Howells whdr.securityIndex = conn->security_ix; 2328c3e34a4SDavid Howells whdr._rsvd = 0; 23368d6d1aeSDavid Howells whdr.serviceId = htons(conn->service_id); 2348c3e34a4SDavid Howells 23564753092SDavid Howells word = htonl(conn->abort_code); 2368c3e34a4SDavid Howells 2378c3e34a4SDavid Howells iov[0].iov_base = &whdr; 2388c3e34a4SDavid Howells iov[0].iov_len = sizeof(whdr); 2398c3e34a4SDavid Howells iov[1].iov_base = &word; 2408c3e34a4SDavid Howells iov[1].iov_len = sizeof(word); 2418c3e34a4SDavid Howells 2428c3e34a4SDavid Howells len = iov[0].iov_len + iov[1].iov_len; 2438c3e34a4SDavid Howells 2448c3e34a4SDavid Howells serial = atomic_inc_return(&conn->serial); 2458c3e34a4SDavid Howells whdr.serial = htonl(serial); 24664753092SDavid Howells _proto("Tx CONN ABORT %%%u { %d }", serial, conn->abort_code); 2478c3e34a4SDavid Howells 24885f32278SDavid Howells ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len); 2498c3e34a4SDavid Howells if (ret < 0) { 2506b47fe1dSDavid Howells trace_rxrpc_tx_fail(conn->debug_id, serial, ret, 2514764c0daSDavid Howells rxrpc_tx_point_conn_abort); 2528c3e34a4SDavid Howells _debug("sendmsg failed: %d", ret); 2538c3e34a4SDavid Howells return -EAGAIN; 2548c3e34a4SDavid Howells } 2558c3e34a4SDavid Howells 2564764c0daSDavid Howells trace_rxrpc_tx_packet(conn->debug_id, &whdr, rxrpc_tx_point_conn_abort); 2574764c0daSDavid Howells 258330bdcfaSDavid Howells conn->params.peer->last_tx_at = ktime_get_seconds(); 259ace45becSDavid Howells 2608c3e34a4SDavid Howells _leave(" = 0"); 2618c3e34a4SDavid Howells return 0; 2628c3e34a4SDavid Howells } 2638c3e34a4SDavid Howells 2648c3e34a4SDavid Howells /* 2658c3e34a4SDavid Howells * mark a call as being on a now-secured channel 266248f219cSDavid Howells * - must be called with BH's disabled. 2678c3e34a4SDavid Howells */ 2688c3e34a4SDavid Howells static void rxrpc_call_is_secure(struct rxrpc_call *call) 2698c3e34a4SDavid Howells { 2708c3e34a4SDavid Howells _enter("%p", call); 2718c3e34a4SDavid Howells if (call) { 272248f219cSDavid Howells write_lock_bh(&call->state_lock); 273248f219cSDavid Howells if (call->state == RXRPC_CALL_SERVER_SECURING) { 274248f219cSDavid Howells call->state = RXRPC_CALL_SERVER_ACCEPTING; 275248f219cSDavid Howells rxrpc_notify_socket(call); 276248f219cSDavid Howells } 277248f219cSDavid Howells write_unlock_bh(&call->state_lock); 2788c3e34a4SDavid Howells } 2798c3e34a4SDavid Howells } 2808c3e34a4SDavid Howells 2818c3e34a4SDavid Howells /* 2828c3e34a4SDavid Howells * connection-level Rx packet processor 2838c3e34a4SDavid Howells */ 2848c3e34a4SDavid Howells static int rxrpc_process_event(struct rxrpc_connection *conn, 2858c3e34a4SDavid Howells struct sk_buff *skb, 2868c3e34a4SDavid Howells u32 *_abort_code) 2878c3e34a4SDavid Howells { 2888c3e34a4SDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 2898c3e34a4SDavid Howells __be32 wtmp; 2908c3e34a4SDavid Howells u32 abort_code; 2918c3e34a4SDavid Howells int loop, ret; 2928c3e34a4SDavid Howells 2938c3e34a4SDavid Howells if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { 294248f219cSDavid Howells _leave(" = -ECONNABORTED [%u]", conn->state); 2958c3e34a4SDavid Howells return -ECONNABORTED; 2968c3e34a4SDavid Howells } 2978c3e34a4SDavid Howells 2988c3e34a4SDavid Howells _enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial); 2998c3e34a4SDavid Howells 3008c3e34a4SDavid Howells switch (sp->hdr.type) { 30118bfeba5SDavid Howells case RXRPC_PACKET_TYPE_DATA: 30218bfeba5SDavid Howells case RXRPC_PACKET_TYPE_ACK: 3033136ef49SDavid Howells rxrpc_conn_retransmit_call(conn, skb, 3043136ef49SDavid Howells sp->hdr.cid & RXRPC_CHANNELMASK); 30518bfeba5SDavid Howells return 0; 30618bfeba5SDavid Howells 3074d4a6ac7SDavid Howells case RXRPC_PACKET_TYPE_BUSY: 3084d4a6ac7SDavid Howells /* Just ignore BUSY packets for now. */ 3094d4a6ac7SDavid Howells return 0; 3104d4a6ac7SDavid Howells 3118c3e34a4SDavid Howells case RXRPC_PACKET_TYPE_ABORT: 312775e5b71SDavid Howells if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), 313fb46f6eeSDavid Howells &wtmp, sizeof(wtmp)) < 0) { 314fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 315fb46f6eeSDavid Howells tracepoint_string("bad_abort")); 3168c3e34a4SDavid Howells return -EPROTO; 317fb46f6eeSDavid Howells } 3188c3e34a4SDavid Howells abort_code = ntohl(wtmp); 3198c3e34a4SDavid Howells _proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code); 3208c3e34a4SDavid Howells 32164753092SDavid Howells conn->error = -ECONNABORTED; 32264753092SDavid Howells conn->abort_code = abort_code; 3238c3e34a4SDavid Howells conn->state = RXRPC_CONN_REMOTELY_ABORTED; 32464753092SDavid Howells rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED); 3258c3e34a4SDavid Howells return -ECONNABORTED; 3268c3e34a4SDavid Howells 3278c3e34a4SDavid Howells case RXRPC_PACKET_TYPE_CHALLENGE: 3288c3e34a4SDavid Howells return conn->security->respond_to_challenge(conn, skb, 3298c3e34a4SDavid Howells _abort_code); 3308c3e34a4SDavid Howells 3318c3e34a4SDavid Howells case RXRPC_PACKET_TYPE_RESPONSE: 3328c3e34a4SDavid Howells ret = conn->security->verify_response(conn, skb, _abort_code); 3338c3e34a4SDavid Howells if (ret < 0) 3348c3e34a4SDavid Howells return ret; 3358c3e34a4SDavid Howells 3368c3e34a4SDavid Howells ret = conn->security->init_connection_security(conn); 3378c3e34a4SDavid Howells if (ret < 0) 3388c3e34a4SDavid Howells return ret; 3398c3e34a4SDavid Howells 340a263629dSHerbert Xu ret = conn->security->prime_packet_security(conn); 341a263629dSHerbert Xu if (ret < 0) 342a263629dSHerbert Xu return ret; 343a263629dSHerbert Xu 344a1399f8bSDavid Howells spin_lock(&conn->channel_lock); 3458c3e34a4SDavid Howells spin_lock(&conn->state_lock); 3468c3e34a4SDavid Howells 347bba304dbSDavid Howells if (conn->state == RXRPC_CONN_SERVICE_CHALLENGING) { 348bba304dbSDavid Howells conn->state = RXRPC_CONN_SERVICE; 349248f219cSDavid Howells spin_unlock(&conn->state_lock); 3508c3e34a4SDavid Howells for (loop = 0; loop < RXRPC_MAXCALLS; loop++) 351dee46364SDavid Howells rxrpc_call_is_secure( 352dee46364SDavid Howells rcu_dereference_protected( 353a1399f8bSDavid Howells conn->channels[loop].call, 354a1399f8bSDavid Howells lockdep_is_held(&conn->channel_lock))); 355248f219cSDavid Howells } else { 356248f219cSDavid Howells spin_unlock(&conn->state_lock); 3578c3e34a4SDavid Howells } 3588c3e34a4SDavid Howells 359a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3608c3e34a4SDavid Howells return 0; 3618c3e34a4SDavid Howells 3628c3e34a4SDavid Howells default: 363fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 364fb46f6eeSDavid Howells tracepoint_string("bad_conn_pkt")); 3658c3e34a4SDavid Howells return -EPROTO; 3668c3e34a4SDavid Howells } 3678c3e34a4SDavid Howells } 3688c3e34a4SDavid Howells 3698c3e34a4SDavid Howells /* 3708c3e34a4SDavid Howells * set up security and issue a challenge 3718c3e34a4SDavid Howells */ 3728c3e34a4SDavid Howells static void rxrpc_secure_connection(struct rxrpc_connection *conn) 3738c3e34a4SDavid Howells { 3748c3e34a4SDavid Howells u32 abort_code; 3758c3e34a4SDavid Howells int ret; 3768c3e34a4SDavid Howells 3778c3e34a4SDavid Howells _enter("{%d}", conn->debug_id); 3788c3e34a4SDavid Howells 3798c3e34a4SDavid Howells ASSERT(conn->security_ix != 0); 3808c3e34a4SDavid Howells 38119ffa01cSDavid Howells if (!conn->params.key) { 3828c3e34a4SDavid Howells _debug("set up security"); 3838c3e34a4SDavid Howells ret = rxrpc_init_server_conn_security(conn); 3848c3e34a4SDavid Howells switch (ret) { 3858c3e34a4SDavid Howells case 0: 3868c3e34a4SDavid Howells break; 3878c3e34a4SDavid Howells case -ENOENT: 3888c3e34a4SDavid Howells abort_code = RX_CALL_DEAD; 3898c3e34a4SDavid Howells goto abort; 3908c3e34a4SDavid Howells default: 3918c3e34a4SDavid Howells abort_code = RXKADNOAUTH; 3928c3e34a4SDavid Howells goto abort; 3938c3e34a4SDavid Howells } 3948c3e34a4SDavid Howells } 3958c3e34a4SDavid Howells 3968c3e34a4SDavid Howells if (conn->security->issue_challenge(conn) < 0) { 3978c3e34a4SDavid Howells abort_code = RX_CALL_DEAD; 3988c3e34a4SDavid Howells ret = -ENOMEM; 3998c3e34a4SDavid Howells goto abort; 4008c3e34a4SDavid Howells } 4018c3e34a4SDavid Howells 4028c3e34a4SDavid Howells _leave(""); 4038c3e34a4SDavid Howells return; 4048c3e34a4SDavid Howells 4058c3e34a4SDavid Howells abort: 4068c3e34a4SDavid Howells _debug("abort %d, %d", ret, abort_code); 4073a92789aSDavid Howells rxrpc_abort_connection(conn, ret, abort_code); 4088c3e34a4SDavid Howells _leave(" [aborted]"); 4098c3e34a4SDavid Howells } 4108c3e34a4SDavid Howells 4118c3e34a4SDavid Howells /* 4123136ef49SDavid Howells * Process delayed final ACKs that we haven't subsumed into a subsequent call. 4133136ef49SDavid Howells */ 4143136ef49SDavid Howells static void rxrpc_process_delayed_final_acks(struct rxrpc_connection *conn) 4153136ef49SDavid Howells { 4163136ef49SDavid Howells unsigned long j = jiffies, next_j; 4173136ef49SDavid Howells unsigned int channel; 4183136ef49SDavid Howells bool set; 4193136ef49SDavid Howells 4203136ef49SDavid Howells again: 4213136ef49SDavid Howells next_j = j + LONG_MAX; 4223136ef49SDavid Howells set = false; 4233136ef49SDavid Howells for (channel = 0; channel < RXRPC_MAXCALLS; channel++) { 4243136ef49SDavid Howells struct rxrpc_channel *chan = &conn->channels[channel]; 4253136ef49SDavid Howells unsigned long ack_at; 4263136ef49SDavid Howells 4273136ef49SDavid Howells if (!test_bit(RXRPC_CONN_FINAL_ACK_0 + channel, &conn->flags)) 4283136ef49SDavid Howells continue; 4293136ef49SDavid Howells 4303136ef49SDavid Howells smp_rmb(); /* vs rxrpc_disconnect_client_call */ 4313136ef49SDavid Howells ack_at = READ_ONCE(chan->final_ack_at); 4323136ef49SDavid Howells 4333136ef49SDavid Howells if (time_before(j, ack_at)) { 4343136ef49SDavid Howells if (time_before(ack_at, next_j)) { 4353136ef49SDavid Howells next_j = ack_at; 4363136ef49SDavid Howells set = true; 4373136ef49SDavid Howells } 4383136ef49SDavid Howells continue; 4393136ef49SDavid Howells } 4403136ef49SDavid Howells 4413136ef49SDavid Howells if (test_and_clear_bit(RXRPC_CONN_FINAL_ACK_0 + channel, 4423136ef49SDavid Howells &conn->flags)) 4433136ef49SDavid Howells rxrpc_conn_retransmit_call(conn, NULL, channel); 4443136ef49SDavid Howells } 4453136ef49SDavid Howells 4463136ef49SDavid Howells j = jiffies; 4473136ef49SDavid Howells if (time_before_eq(next_j, j)) 4483136ef49SDavid Howells goto again; 4493136ef49SDavid Howells if (set) 4503136ef49SDavid Howells rxrpc_reduce_conn_timer(conn, next_j); 4513136ef49SDavid Howells } 4523136ef49SDavid Howells 4533136ef49SDavid Howells /* 4548c3e34a4SDavid Howells * connection-level event processor 4558c3e34a4SDavid Howells */ 4568c3e34a4SDavid Howells void rxrpc_process_connection(struct work_struct *work) 4578c3e34a4SDavid Howells { 4588c3e34a4SDavid Howells struct rxrpc_connection *conn = 4598c3e34a4SDavid Howells container_of(work, struct rxrpc_connection, processor); 4608c3e34a4SDavid Howells struct sk_buff *skb; 4618c3e34a4SDavid Howells u32 abort_code = RX_PROTOCOL_ERROR; 4628c3e34a4SDavid Howells int ret; 4638c3e34a4SDavid Howells 464363deeabSDavid Howells rxrpc_see_connection(conn); 4658c3e34a4SDavid Howells 4662c4579e4SDavid Howells if (test_and_clear_bit(RXRPC_CONN_EV_CHALLENGE, &conn->events)) 4678c3e34a4SDavid Howells rxrpc_secure_connection(conn); 4688c3e34a4SDavid Howells 4693136ef49SDavid Howells /* Process delayed ACKs whose time has come. */ 4703136ef49SDavid Howells if (conn->flags & RXRPC_CONN_FINAL_ACK_MASK) 4713136ef49SDavid Howells rxrpc_process_delayed_final_acks(conn); 4723136ef49SDavid Howells 4738c3e34a4SDavid Howells /* go through the conn-level event packets, releasing the ref on this 4748c3e34a4SDavid Howells * connection that each one has when we've finished with it */ 4758c3e34a4SDavid Howells while ((skb = skb_dequeue(&conn->rx_queue))) { 47671f3ca40SDavid Howells rxrpc_see_skb(skb, rxrpc_skb_rx_seen); 4778c3e34a4SDavid Howells ret = rxrpc_process_event(conn, skb, &abort_code); 4788c3e34a4SDavid Howells switch (ret) { 4798c3e34a4SDavid Howells case -EPROTO: 4808c3e34a4SDavid Howells case -EKEYEXPIRED: 4818c3e34a4SDavid Howells case -EKEYREJECTED: 4828c3e34a4SDavid Howells goto protocol_error; 4838c2f826dSDavid Howells case -ENOMEM: 4848c3e34a4SDavid Howells case -EAGAIN: 4858c3e34a4SDavid Howells goto requeue_and_leave; 4868c3e34a4SDavid Howells case -ECONNABORTED: 4878c3e34a4SDavid Howells default: 48871f3ca40SDavid Howells rxrpc_free_skb(skb, rxrpc_skb_rx_freed); 4898c3e34a4SDavid Howells break; 4908c3e34a4SDavid Howells } 4918c3e34a4SDavid Howells } 4928c3e34a4SDavid Howells 4938c3e34a4SDavid Howells out: 4948c3e34a4SDavid Howells rxrpc_put_connection(conn); 4958c3e34a4SDavid Howells _leave(""); 4968c3e34a4SDavid Howells return; 4978c3e34a4SDavid Howells 4988c3e34a4SDavid Howells requeue_and_leave: 4998c3e34a4SDavid Howells skb_queue_head(&conn->rx_queue, skb); 5008c3e34a4SDavid Howells goto out; 5018c3e34a4SDavid Howells 5028c3e34a4SDavid Howells protocol_error: 5033a92789aSDavid Howells if (rxrpc_abort_connection(conn, ret, abort_code) < 0) 5048c3e34a4SDavid Howells goto requeue_and_leave; 50571f3ca40SDavid Howells rxrpc_free_skb(skb, rxrpc_skb_rx_freed); 5068c3e34a4SDavid Howells goto out; 5078c3e34a4SDavid Howells } 508