18c3e34a4SDavid Howells /* RxRPC individual remote procedure call 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/slab.h> 158c3e34a4SDavid Howells #include <linux/module.h> 168c3e34a4SDavid Howells #include <linux/circ_buf.h> 178c3e34a4SDavid Howells #include <linux/spinlock_types.h> 188c3e34a4SDavid Howells #include <net/sock.h> 198c3e34a4SDavid Howells #include <net/af_rxrpc.h> 208c3e34a4SDavid Howells #include "ar-internal.h" 218c3e34a4SDavid Howells 228c3e34a4SDavid Howells /* 238c3e34a4SDavid Howells * Maximum lifetime of a call (in jiffies). 248c3e34a4SDavid Howells */ 258c3e34a4SDavid Howells unsigned int rxrpc_max_call_lifetime = 60 * HZ; 268c3e34a4SDavid Howells 278c3e34a4SDavid Howells /* 288c3e34a4SDavid Howells * Time till dead call expires after last use (in jiffies). 298c3e34a4SDavid Howells */ 308c3e34a4SDavid Howells unsigned int rxrpc_dead_call_expiry = 2 * HZ; 318c3e34a4SDavid Howells 328c3e34a4SDavid Howells const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = { 33999b69f8SDavid Howells [RXRPC_CALL_UNINITIALISED] = "Uninit ", 34999b69f8SDavid Howells [RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn", 358c3e34a4SDavid Howells [RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq", 368c3e34a4SDavid Howells [RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl", 378c3e34a4SDavid Howells [RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl", 388c3e34a4SDavid Howells [RXRPC_CALL_CLIENT_FINAL_ACK] = "ClFnlACK", 398c3e34a4SDavid Howells [RXRPC_CALL_SERVER_SECURING] = "SvSecure", 408c3e34a4SDavid Howells [RXRPC_CALL_SERVER_ACCEPTING] = "SvAccept", 418c3e34a4SDavid Howells [RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq", 428c3e34a4SDavid Howells [RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq", 438c3e34a4SDavid Howells [RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl", 448c3e34a4SDavid Howells [RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK", 458c3e34a4SDavid Howells [RXRPC_CALL_COMPLETE] = "Complete", 46f5c17aaeSDavid Howells [RXRPC_CALL_DEAD] = "Dead ", 47f5c17aaeSDavid Howells }; 48f5c17aaeSDavid Howells 49f5c17aaeSDavid Howells const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = { 50f5c17aaeSDavid Howells [RXRPC_CALL_SUCCEEDED] = "Complete", 518c3e34a4SDavid Howells [RXRPC_CALL_SERVER_BUSY] = "SvBusy ", 528c3e34a4SDavid Howells [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort", 538c3e34a4SDavid Howells [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort", 54f5c17aaeSDavid Howells [RXRPC_CALL_LOCAL_ERROR] = "LocError", 558c3e34a4SDavid Howells [RXRPC_CALL_NETWORK_ERROR] = "NetError", 568c3e34a4SDavid Howells }; 578c3e34a4SDavid Howells 588c3e34a4SDavid Howells struct kmem_cache *rxrpc_call_jar; 598c3e34a4SDavid Howells LIST_HEAD(rxrpc_calls); 608c3e34a4SDavid Howells DEFINE_RWLOCK(rxrpc_call_lock); 618c3e34a4SDavid Howells 628c3e34a4SDavid Howells static void rxrpc_destroy_call(struct work_struct *work); 638c3e34a4SDavid Howells static void rxrpc_call_life_expired(unsigned long _call); 648c3e34a4SDavid Howells static void rxrpc_dead_call_expired(unsigned long _call); 658c3e34a4SDavid Howells static void rxrpc_ack_time_expired(unsigned long _call); 668c3e34a4SDavid Howells static void rxrpc_resend_time_expired(unsigned long _call); 678c3e34a4SDavid Howells 688c3e34a4SDavid Howells /* 698c3e34a4SDavid Howells * find an extant server call 708c3e34a4SDavid Howells * - called in process context with IRQs enabled 718c3e34a4SDavid Howells */ 728c3e34a4SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, 738c3e34a4SDavid Howells unsigned long user_call_ID) 748c3e34a4SDavid Howells { 758c3e34a4SDavid Howells struct rxrpc_call *call; 768c3e34a4SDavid Howells struct rb_node *p; 778c3e34a4SDavid Howells 788c3e34a4SDavid Howells _enter("%p,%lx", rx, user_call_ID); 798c3e34a4SDavid Howells 808c3e34a4SDavid Howells read_lock(&rx->call_lock); 818c3e34a4SDavid Howells 828c3e34a4SDavid Howells p = rx->calls.rb_node; 838c3e34a4SDavid Howells while (p) { 848c3e34a4SDavid Howells call = rb_entry(p, struct rxrpc_call, sock_node); 858c3e34a4SDavid Howells 868c3e34a4SDavid Howells if (user_call_ID < call->user_call_ID) 878c3e34a4SDavid Howells p = p->rb_left; 888c3e34a4SDavid Howells else if (user_call_ID > call->user_call_ID) 898c3e34a4SDavid Howells p = p->rb_right; 908c3e34a4SDavid Howells else 918c3e34a4SDavid Howells goto found_extant_call; 928c3e34a4SDavid Howells } 938c3e34a4SDavid Howells 948c3e34a4SDavid Howells read_unlock(&rx->call_lock); 958c3e34a4SDavid Howells _leave(" = NULL"); 968c3e34a4SDavid Howells return NULL; 978c3e34a4SDavid Howells 988c3e34a4SDavid Howells found_extant_call: 998c3e34a4SDavid Howells rxrpc_get_call(call); 1008c3e34a4SDavid Howells read_unlock(&rx->call_lock); 1018c3e34a4SDavid Howells _leave(" = %p [%d]", call, atomic_read(&call->usage)); 1028c3e34a4SDavid Howells return call; 1038c3e34a4SDavid Howells } 1048c3e34a4SDavid Howells 1058c3e34a4SDavid Howells /* 1068c3e34a4SDavid Howells * allocate a new call 1078c3e34a4SDavid Howells */ 1088c3e34a4SDavid Howells static struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp) 1098c3e34a4SDavid Howells { 1108c3e34a4SDavid Howells struct rxrpc_call *call; 1118c3e34a4SDavid Howells 1128c3e34a4SDavid Howells call = kmem_cache_zalloc(rxrpc_call_jar, gfp); 1138c3e34a4SDavid Howells if (!call) 1148c3e34a4SDavid Howells return NULL; 1158c3e34a4SDavid Howells 1168c3e34a4SDavid Howells call->acks_winsz = 16; 1178c3e34a4SDavid Howells call->acks_window = kmalloc(call->acks_winsz * sizeof(unsigned long), 1188c3e34a4SDavid Howells gfp); 1198c3e34a4SDavid Howells if (!call->acks_window) { 1208c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, call); 1218c3e34a4SDavid Howells return NULL; 1228c3e34a4SDavid Howells } 1238c3e34a4SDavid Howells 1248c3e34a4SDavid Howells setup_timer(&call->lifetimer, &rxrpc_call_life_expired, 1258c3e34a4SDavid Howells (unsigned long) call); 1268c3e34a4SDavid Howells setup_timer(&call->deadspan, &rxrpc_dead_call_expired, 1278c3e34a4SDavid Howells (unsigned long) call); 1288c3e34a4SDavid Howells setup_timer(&call->ack_timer, &rxrpc_ack_time_expired, 1298c3e34a4SDavid Howells (unsigned long) call); 1308c3e34a4SDavid Howells setup_timer(&call->resend_timer, &rxrpc_resend_time_expired, 1318c3e34a4SDavid Howells (unsigned long) call); 1328c3e34a4SDavid Howells INIT_WORK(&call->destroyer, &rxrpc_destroy_call); 1338c3e34a4SDavid Howells INIT_WORK(&call->processor, &rxrpc_process_call); 134999b69f8SDavid Howells INIT_LIST_HEAD(&call->link); 13545025bceSDavid Howells INIT_LIST_HEAD(&call->chan_wait_link); 1368c3e34a4SDavid Howells INIT_LIST_HEAD(&call->accept_link); 1378c3e34a4SDavid Howells skb_queue_head_init(&call->rx_queue); 1388c3e34a4SDavid Howells skb_queue_head_init(&call->rx_oos_queue); 13945025bceSDavid Howells init_waitqueue_head(&call->waitq); 1408c3e34a4SDavid Howells spin_lock_init(&call->lock); 1418c3e34a4SDavid Howells rwlock_init(&call->state_lock); 1428c3e34a4SDavid Howells atomic_set(&call->usage, 1); 1438c3e34a4SDavid Howells call->debug_id = atomic_inc_return(&rxrpc_debug_id); 1448c3e34a4SDavid Howells 1458c3e34a4SDavid Howells memset(&call->sock_node, 0xed, sizeof(call->sock_node)); 1468c3e34a4SDavid Howells 1478c3e34a4SDavid Howells call->rx_data_expect = 1; 1488c3e34a4SDavid Howells call->rx_data_eaten = 0; 1498c3e34a4SDavid Howells call->rx_first_oos = 0; 1508c3e34a4SDavid Howells call->ackr_win_top = call->rx_data_eaten + 1 + rxrpc_rx_window_size; 1518c3e34a4SDavid Howells call->creation_jif = jiffies; 1528c3e34a4SDavid Howells return call; 1538c3e34a4SDavid Howells } 1548c3e34a4SDavid Howells 1558c3e34a4SDavid Howells /* 156999b69f8SDavid Howells * Allocate a new client call. 1578c3e34a4SDavid Howells */ 158aa390bbeSDavid Howells static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx, 159999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 1608c3e34a4SDavid Howells gfp_t gfp) 1618c3e34a4SDavid Howells { 1628c3e34a4SDavid Howells struct rxrpc_call *call; 1638c3e34a4SDavid Howells 1648c3e34a4SDavid Howells _enter(""); 1658c3e34a4SDavid Howells 166999b69f8SDavid Howells ASSERT(rx->local != NULL); 1678c3e34a4SDavid Howells 1688c3e34a4SDavid Howells call = rxrpc_alloc_call(gfp); 1698c3e34a4SDavid Howells if (!call) 1708c3e34a4SDavid Howells return ERR_PTR(-ENOMEM); 171999b69f8SDavid Howells call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; 1728c3e34a4SDavid Howells 1738c3e34a4SDavid Howells sock_hold(&rx->sk); 1748c3e34a4SDavid Howells call->socket = rx; 1758c3e34a4SDavid Howells call->rx_data_post = 1; 176999b69f8SDavid Howells call->service_id = srx->srx_service; 177999b69f8SDavid Howells 178999b69f8SDavid Howells _leave(" = %p", call); 179999b69f8SDavid Howells return call; 180999b69f8SDavid Howells } 181999b69f8SDavid Howells 182999b69f8SDavid Howells /* 183999b69f8SDavid Howells * Begin client call. 184999b69f8SDavid Howells */ 185999b69f8SDavid Howells static int rxrpc_begin_client_call(struct rxrpc_call *call, 186999b69f8SDavid Howells struct rxrpc_conn_parameters *cp, 187999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 188999b69f8SDavid Howells gfp_t gfp) 189999b69f8SDavid Howells { 190999b69f8SDavid Howells int ret; 191999b69f8SDavid Howells 192999b69f8SDavid Howells /* Set up or get a connection record and set the protocol parameters, 193999b69f8SDavid Howells * including channel number and call ID. 194999b69f8SDavid Howells */ 195aa390bbeSDavid Howells ret = rxrpc_connect_call(call, cp, srx, gfp); 196999b69f8SDavid Howells if (ret < 0) 197999b69f8SDavid Howells return ret; 198999b69f8SDavid Howells 199999b69f8SDavid Howells call->state = RXRPC_CALL_CLIENT_SEND_REQUEST; 200999b69f8SDavid Howells 20185f32278SDavid Howells spin_lock(&call->conn->params.peer->lock); 20285f32278SDavid Howells hlist_add_head(&call->error_link, &call->conn->params.peer->error_targets); 20385f32278SDavid Howells spin_unlock(&call->conn->params.peer->lock); 2048c3e34a4SDavid Howells 2058c3e34a4SDavid Howells call->lifetimer.expires = jiffies + rxrpc_max_call_lifetime; 2068c3e34a4SDavid Howells add_timer(&call->lifetimer); 207999b69f8SDavid Howells return 0; 2088c3e34a4SDavid Howells } 2098c3e34a4SDavid Howells 2108c3e34a4SDavid Howells /* 2118c3e34a4SDavid Howells * set up a call for the given data 2128c3e34a4SDavid Howells * - called in process context with IRQs enabled 2138c3e34a4SDavid Howells */ 2148c3e34a4SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, 21519ffa01cSDavid Howells struct rxrpc_conn_parameters *cp, 216999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 2178c3e34a4SDavid Howells unsigned long user_call_ID, 2188c3e34a4SDavid Howells gfp_t gfp) 2198c3e34a4SDavid Howells { 2208c3e34a4SDavid Howells struct rxrpc_call *call, *xcall; 2218c3e34a4SDavid Howells struct rb_node *parent, **pp; 222999b69f8SDavid Howells int ret; 2238c3e34a4SDavid Howells 224999b69f8SDavid Howells _enter("%p,%lx", rx, user_call_ID); 2258c3e34a4SDavid Howells 226aa390bbeSDavid Howells call = rxrpc_alloc_client_call(rx, srx, gfp); 2278c3e34a4SDavid Howells if (IS_ERR(call)) { 2288c3e34a4SDavid Howells _leave(" = %ld", PTR_ERR(call)); 2298c3e34a4SDavid Howells return call; 2308c3e34a4SDavid Howells } 2318c3e34a4SDavid Howells 232999b69f8SDavid Howells /* Publish the call, even though it is incompletely set up as yet */ 2338c3e34a4SDavid Howells call->user_call_ID = user_call_ID; 2348c3e34a4SDavid Howells __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); 2358c3e34a4SDavid Howells 2368c3e34a4SDavid Howells write_lock(&rx->call_lock); 2378c3e34a4SDavid Howells 2388c3e34a4SDavid Howells pp = &rx->calls.rb_node; 2398c3e34a4SDavid Howells parent = NULL; 2408c3e34a4SDavid Howells while (*pp) { 2418c3e34a4SDavid Howells parent = *pp; 2428c3e34a4SDavid Howells xcall = rb_entry(parent, struct rxrpc_call, sock_node); 2438c3e34a4SDavid Howells 2448c3e34a4SDavid Howells if (user_call_ID < xcall->user_call_ID) 2458c3e34a4SDavid Howells pp = &(*pp)->rb_left; 2468c3e34a4SDavid Howells else if (user_call_ID > xcall->user_call_ID) 2478c3e34a4SDavid Howells pp = &(*pp)->rb_right; 2488c3e34a4SDavid Howells else 2498c3e34a4SDavid Howells goto found_user_ID_now_present; 2508c3e34a4SDavid Howells } 2518c3e34a4SDavid Howells 2528c3e34a4SDavid Howells rxrpc_get_call(call); 2538c3e34a4SDavid Howells 2548c3e34a4SDavid Howells rb_link_node(&call->sock_node, parent, pp); 2558c3e34a4SDavid Howells rb_insert_color(&call->sock_node, &rx->calls); 2568c3e34a4SDavid Howells write_unlock(&rx->call_lock); 2578c3e34a4SDavid Howells 2588c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 2598c3e34a4SDavid Howells list_add_tail(&call->link, &rxrpc_calls); 2608c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 2618c3e34a4SDavid Howells 262aa390bbeSDavid Howells ret = rxrpc_begin_client_call(call, cp, srx, gfp); 263999b69f8SDavid Howells if (ret < 0) 264999b69f8SDavid Howells goto error; 265999b69f8SDavid Howells 2668c3e34a4SDavid Howells _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); 2678c3e34a4SDavid Howells 2688c3e34a4SDavid Howells _leave(" = %p [new]", call); 2698c3e34a4SDavid Howells return call; 2708c3e34a4SDavid Howells 271999b69f8SDavid Howells error: 272999b69f8SDavid Howells write_lock(&rx->call_lock); 273999b69f8SDavid Howells rb_erase(&call->sock_node, &rx->calls); 274999b69f8SDavid Howells write_unlock(&rx->call_lock); 275999b69f8SDavid Howells rxrpc_put_call(call); 276999b69f8SDavid Howells 277999b69f8SDavid Howells write_lock_bh(&rxrpc_call_lock); 278d1e858c5SDavid Howells list_del_init(&call->link); 279999b69f8SDavid Howells write_unlock_bh(&rxrpc_call_lock); 280999b69f8SDavid Howells 28117b963e3SDavid Howells set_bit(RXRPC_CALL_RELEASED, &call->flags); 282d1e858c5SDavid Howells call->state = RXRPC_CALL_DEAD; 283999b69f8SDavid Howells rxrpc_put_call(call); 284999b69f8SDavid Howells _leave(" = %d", ret); 285999b69f8SDavid Howells return ERR_PTR(ret); 286999b69f8SDavid Howells 2878c3e34a4SDavid Howells /* We unexpectedly found the user ID in the list after taking 2888c3e34a4SDavid Howells * the call_lock. This shouldn't happen unless the user races 2898c3e34a4SDavid Howells * with itself and tries to add the same user ID twice at the 2908c3e34a4SDavid Howells * same time in different threads. 2918c3e34a4SDavid Howells */ 2928c3e34a4SDavid Howells found_user_ID_now_present: 2938c3e34a4SDavid Howells write_unlock(&rx->call_lock); 29417b963e3SDavid Howells set_bit(RXRPC_CALL_RELEASED, &call->flags); 295d1e858c5SDavid Howells call->state = RXRPC_CALL_DEAD; 2968c3e34a4SDavid Howells rxrpc_put_call(call); 2978c3e34a4SDavid Howells _leave(" = -EEXIST [%p]", call); 2988c3e34a4SDavid Howells return ERR_PTR(-EEXIST); 2998c3e34a4SDavid Howells } 3008c3e34a4SDavid Howells 3018c3e34a4SDavid Howells /* 3028c3e34a4SDavid Howells * set up an incoming call 3038c3e34a4SDavid Howells * - called in process context with IRQs enabled 3048c3e34a4SDavid Howells */ 3058c3e34a4SDavid Howells struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *rx, 3068c3e34a4SDavid Howells struct rxrpc_connection *conn, 30742886ffeSDavid Howells struct sk_buff *skb) 3088c3e34a4SDavid Howells { 30942886ffeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 3108c3e34a4SDavid Howells struct rxrpc_call *call, *candidate; 311a1399f8bSDavid Howells u32 call_id, chan; 3128c3e34a4SDavid Howells 3138c3e34a4SDavid Howells _enter(",%d", conn->debug_id); 3148c3e34a4SDavid Howells 3158c3e34a4SDavid Howells ASSERT(rx != NULL); 3168c3e34a4SDavid Howells 3178c3e34a4SDavid Howells candidate = rxrpc_alloc_call(GFP_NOIO); 3188c3e34a4SDavid Howells if (!candidate) 3198c3e34a4SDavid Howells return ERR_PTR(-EBUSY); 3208c3e34a4SDavid Howells 321a1399f8bSDavid Howells chan = sp->hdr.cid & RXRPC_CHANNELMASK; 3228c3e34a4SDavid Howells candidate->socket = rx; 3238c3e34a4SDavid Howells candidate->conn = conn; 324df5d8bf7SDavid Howells candidate->peer = conn->params.peer; 32542886ffeSDavid Howells candidate->cid = sp->hdr.cid; 32642886ffeSDavid Howells candidate->call_id = sp->hdr.callNumber; 3278c3e34a4SDavid Howells candidate->rx_data_post = 0; 3288c3e34a4SDavid Howells candidate->state = RXRPC_CALL_SERVER_ACCEPTING; 329dabe5a79SDavid Howells candidate->flags |= (1 << RXRPC_CALL_IS_SERVICE); 3308c3e34a4SDavid Howells if (conn->security_ix > 0) 3318c3e34a4SDavid Howells candidate->state = RXRPC_CALL_SERVER_SECURING; 3328c3e34a4SDavid Howells 333a1399f8bSDavid Howells spin_lock(&conn->channel_lock); 3348c3e34a4SDavid Howells 3358c3e34a4SDavid Howells /* set the channel for this call */ 336a1399f8bSDavid Howells call = rcu_dereference_protected(conn->channels[chan].call, 337a1399f8bSDavid Howells lockdep_is_held(&conn->channel_lock)); 338a1399f8bSDavid Howells 33901a90a45SDavid Howells _debug("channel[%u] is %p", candidate->cid & RXRPC_CHANNELMASK, call); 34042886ffeSDavid Howells if (call && call->call_id == sp->hdr.callNumber) { 3418c3e34a4SDavid Howells /* already set; must've been a duplicate packet */ 3428c3e34a4SDavid Howells _debug("extant call [%d]", call->state); 3438c3e34a4SDavid Howells ASSERTCMP(call->conn, ==, conn); 3448c3e34a4SDavid Howells 3458c3e34a4SDavid Howells read_lock(&call->state_lock); 3468c3e34a4SDavid Howells switch (call->state) { 3478c3e34a4SDavid Howells case RXRPC_CALL_LOCALLY_ABORTED: 3488c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events)) 3498c3e34a4SDavid Howells rxrpc_queue_call(call); 3508c3e34a4SDavid Howells case RXRPC_CALL_REMOTELY_ABORTED: 3518c3e34a4SDavid Howells read_unlock(&call->state_lock); 3528c3e34a4SDavid Howells goto aborted_call; 3538c3e34a4SDavid Howells default: 3548c3e34a4SDavid Howells rxrpc_get_call(call); 3558c3e34a4SDavid Howells read_unlock(&call->state_lock); 3568c3e34a4SDavid Howells goto extant_call; 3578c3e34a4SDavid Howells } 3588c3e34a4SDavid Howells } 3598c3e34a4SDavid Howells 3608c3e34a4SDavid Howells if (call) { 3618c3e34a4SDavid Howells /* it seems the channel is still in use from the previous call 3628c3e34a4SDavid Howells * - ditch the old binding if its call is now complete */ 3638c3e34a4SDavid Howells _debug("CALL: %u { %s }", 3648c3e34a4SDavid Howells call->debug_id, rxrpc_call_states[call->state]); 3658c3e34a4SDavid Howells 366f5c17aaeSDavid Howells if (call->state == RXRPC_CALL_COMPLETE) { 36745025bceSDavid Howells __rxrpc_disconnect_call(conn, call); 3688c3e34a4SDavid Howells } else { 369a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3708c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 3718c3e34a4SDavid Howells _leave(" = -EBUSY"); 3728c3e34a4SDavid Howells return ERR_PTR(-EBUSY); 3738c3e34a4SDavid Howells } 3748c3e34a4SDavid Howells } 3758c3e34a4SDavid Howells 3768c3e34a4SDavid Howells /* check the call number isn't duplicate */ 3778c3e34a4SDavid Howells _debug("check dup"); 37842886ffeSDavid Howells call_id = sp->hdr.callNumber; 3798c3e34a4SDavid Howells 380a1399f8bSDavid Howells /* We just ignore calls prior to the current call ID. Terminated calls 381a1399f8bSDavid Howells * are handled via the connection. 3828c3e34a4SDavid Howells */ 383a1399f8bSDavid Howells if (call_id <= conn->channels[chan].call_counter) 384a1399f8bSDavid Howells goto old_call; /* TODO: Just drop packet */ 3858c3e34a4SDavid Howells 3868c3e34a4SDavid Howells /* make the call available */ 3878c3e34a4SDavid Howells _debug("new call"); 3888c3e34a4SDavid Howells call = candidate; 3898c3e34a4SDavid Howells candidate = NULL; 390a1399f8bSDavid Howells conn->channels[chan].call_counter = call_id; 391a1399f8bSDavid Howells rcu_assign_pointer(conn->channels[chan].call, call); 3928c3e34a4SDavid Howells sock_hold(&rx->sk); 3935627cc8bSDavid Howells rxrpc_get_connection(conn); 394df5d8bf7SDavid Howells rxrpc_get_peer(call->peer); 395a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3968c3e34a4SDavid Howells 39785f32278SDavid Howells spin_lock(&conn->params.peer->lock); 39885f32278SDavid Howells hlist_add_head(&call->error_link, &conn->params.peer->error_targets); 39985f32278SDavid Howells spin_unlock(&conn->params.peer->lock); 4008c3e34a4SDavid Howells 4018c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 4028c3e34a4SDavid Howells list_add_tail(&call->link, &rxrpc_calls); 4038c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 4048c3e34a4SDavid Howells 40519ffa01cSDavid Howells call->service_id = conn->params.service_id; 4068c3e34a4SDavid Howells 4078c3e34a4SDavid Howells _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); 4088c3e34a4SDavid Howells 4098c3e34a4SDavid Howells call->lifetimer.expires = jiffies + rxrpc_max_call_lifetime; 4108c3e34a4SDavid Howells add_timer(&call->lifetimer); 4118c3e34a4SDavid Howells _leave(" = %p {%d} [new]", call, call->debug_id); 4128c3e34a4SDavid Howells return call; 4138c3e34a4SDavid Howells 4148c3e34a4SDavid Howells extant_call: 415a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4168c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4178c3e34a4SDavid Howells _leave(" = %p {%d} [extant]", call, call ? call->debug_id : -1); 4188c3e34a4SDavid Howells return call; 4198c3e34a4SDavid Howells 4208c3e34a4SDavid Howells aborted_call: 421a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4228c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4238c3e34a4SDavid Howells _leave(" = -ECONNABORTED"); 4248c3e34a4SDavid Howells return ERR_PTR(-ECONNABORTED); 4258c3e34a4SDavid Howells 4268c3e34a4SDavid Howells old_call: 427a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4288c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4298c3e34a4SDavid Howells _leave(" = -ECONNRESET [old]"); 4308c3e34a4SDavid Howells return ERR_PTR(-ECONNRESET); 4318c3e34a4SDavid Howells } 4328c3e34a4SDavid Howells 4338c3e34a4SDavid Howells /* 4348c3e34a4SDavid Howells * detach a call from a socket and set up for release 4358c3e34a4SDavid Howells */ 4368c3e34a4SDavid Howells void rxrpc_release_call(struct rxrpc_call *call) 4378c3e34a4SDavid Howells { 4388c3e34a4SDavid Howells struct rxrpc_connection *conn = call->conn; 4398c3e34a4SDavid Howells struct rxrpc_sock *rx = call->socket; 4408c3e34a4SDavid Howells 4418c3e34a4SDavid Howells _enter("{%d,%d,%d,%d}", 4428c3e34a4SDavid Howells call->debug_id, atomic_read(&call->usage), 4438c3e34a4SDavid Howells atomic_read(&call->ackr_not_idle), 4448c3e34a4SDavid Howells call->rx_first_oos); 4458c3e34a4SDavid Howells 4468c3e34a4SDavid Howells spin_lock_bh(&call->lock); 4478c3e34a4SDavid Howells if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) 4488c3e34a4SDavid Howells BUG(); 4498c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 4508c3e34a4SDavid Howells 4518c3e34a4SDavid Howells /* dissociate from the socket 4528c3e34a4SDavid Howells * - the socket's ref on the call is passed to the death timer 4538c3e34a4SDavid Howells */ 4548c3e34a4SDavid Howells _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); 4558c3e34a4SDavid Howells 456e653cfe4SDavid Howells spin_lock(&conn->params.peer->lock); 457e653cfe4SDavid Howells hlist_del_init(&call->error_link); 458e653cfe4SDavid Howells spin_unlock(&conn->params.peer->lock); 459e653cfe4SDavid Howells 4608c3e34a4SDavid Howells write_lock_bh(&rx->call_lock); 4618c3e34a4SDavid Howells if (!list_empty(&call->accept_link)) { 4628c3e34a4SDavid Howells _debug("unlinking once-pending call %p { e=%lx f=%lx }", 4638c3e34a4SDavid Howells call, call->events, call->flags); 4648c3e34a4SDavid Howells ASSERT(!test_bit(RXRPC_CALL_HAS_USERID, &call->flags)); 4658c3e34a4SDavid Howells list_del_init(&call->accept_link); 4668c3e34a4SDavid Howells sk_acceptq_removed(&rx->sk); 4678c3e34a4SDavid Howells } else if (test_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { 4688c3e34a4SDavid Howells rb_erase(&call->sock_node, &rx->calls); 4698c3e34a4SDavid Howells memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); 4708c3e34a4SDavid Howells clear_bit(RXRPC_CALL_HAS_USERID, &call->flags); 4718c3e34a4SDavid Howells } 4728c3e34a4SDavid Howells write_unlock_bh(&rx->call_lock); 4738c3e34a4SDavid Howells 4748c3e34a4SDavid Howells /* free up the channel for reuse */ 475a1399f8bSDavid Howells write_lock_bh(&call->state_lock); 4768c3e34a4SDavid Howells 4778c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE && 4788c3e34a4SDavid Howells call->state != RXRPC_CALL_CLIENT_FINAL_ACK) { 4798c3e34a4SDavid Howells _debug("+++ ABORTING STATE %d +++\n", call->state); 480f5c17aaeSDavid Howells __rxrpc_abort_call(call, RX_CALL_DEAD, ECONNRESET); 4818c3e34a4SDavid Howells } 482a1399f8bSDavid Howells write_unlock_bh(&call->state_lock); 4838c3e34a4SDavid Howells 484e653cfe4SDavid Howells rxrpc_disconnect_call(call); 485e653cfe4SDavid Howells 4868c3e34a4SDavid Howells /* clean up the Rx queue */ 4878c3e34a4SDavid Howells if (!skb_queue_empty(&call->rx_queue) || 4888c3e34a4SDavid Howells !skb_queue_empty(&call->rx_oos_queue)) { 4898c3e34a4SDavid Howells struct rxrpc_skb_priv *sp; 4908c3e34a4SDavid Howells struct sk_buff *skb; 4918c3e34a4SDavid Howells 4928c3e34a4SDavid Howells _debug("purge Rx queues"); 4938c3e34a4SDavid Howells 4948c3e34a4SDavid Howells spin_lock_bh(&call->lock); 4958c3e34a4SDavid Howells while ((skb = skb_dequeue(&call->rx_queue)) || 4968c3e34a4SDavid Howells (skb = skb_dequeue(&call->rx_oos_queue))) { 4978c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 4988c3e34a4SDavid Howells 49955cae7a4SArnd Bergmann sp = rxrpc_skb(skb); 5008c3e34a4SDavid Howells _debug("- zap %s %%%u #%u", 5018c3e34a4SDavid Howells rxrpc_pkts[sp->hdr.type], 5028c3e34a4SDavid Howells sp->hdr.serial, sp->hdr.seq); 5038c3e34a4SDavid Howells rxrpc_free_skb(skb); 5048c3e34a4SDavid Howells spin_lock_bh(&call->lock); 5058c3e34a4SDavid Howells } 5068c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 5078c3e34a4SDavid Howells 5088c3e34a4SDavid Howells ASSERTCMP(call->state, !=, RXRPC_CALL_COMPLETE); 5098c3e34a4SDavid Howells } 5108c3e34a4SDavid Howells 5118c3e34a4SDavid Howells del_timer_sync(&call->resend_timer); 5128c3e34a4SDavid Howells del_timer_sync(&call->ack_timer); 5138c3e34a4SDavid Howells del_timer_sync(&call->lifetimer); 5148c3e34a4SDavid Howells call->deadspan.expires = jiffies + rxrpc_dead_call_expiry; 5158c3e34a4SDavid Howells add_timer(&call->deadspan); 5168c3e34a4SDavid Howells 5178c3e34a4SDavid Howells _leave(""); 5188c3e34a4SDavid Howells } 5198c3e34a4SDavid Howells 5208c3e34a4SDavid Howells /* 5218c3e34a4SDavid Howells * handle a dead call being ready for reaping 5228c3e34a4SDavid Howells */ 5238c3e34a4SDavid Howells static void rxrpc_dead_call_expired(unsigned long _call) 5248c3e34a4SDavid Howells { 5258c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 5268c3e34a4SDavid Howells 5278c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 5288c3e34a4SDavid Howells 5298c3e34a4SDavid Howells write_lock_bh(&call->state_lock); 5308c3e34a4SDavid Howells call->state = RXRPC_CALL_DEAD; 5318c3e34a4SDavid Howells write_unlock_bh(&call->state_lock); 5328c3e34a4SDavid Howells rxrpc_put_call(call); 5338c3e34a4SDavid Howells } 5348c3e34a4SDavid Howells 5358c3e34a4SDavid Howells /* 5368c3e34a4SDavid Howells * mark a call as to be released, aborting it if it's still in progress 5378c3e34a4SDavid Howells * - called with softirqs disabled 5388c3e34a4SDavid Howells */ 5398c3e34a4SDavid Howells static void rxrpc_mark_call_released(struct rxrpc_call *call) 5408c3e34a4SDavid Howells { 5418c3e34a4SDavid Howells bool sched; 5428c3e34a4SDavid Howells 5438c3e34a4SDavid Howells write_lock(&call->state_lock); 5448c3e34a4SDavid Howells if (call->state < RXRPC_CALL_DEAD) { 545f5c17aaeSDavid Howells sched = __rxrpc_abort_call(call, RX_CALL_DEAD, ECONNRESET); 5468c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_RELEASE, &call->events)) 5478c3e34a4SDavid Howells sched = true; 5488c3e34a4SDavid Howells } 5498c3e34a4SDavid Howells write_unlock(&call->state_lock); 550f5c17aaeSDavid Howells if (sched) 551f5c17aaeSDavid Howells rxrpc_queue_call(call); 5528c3e34a4SDavid Howells } 5538c3e34a4SDavid Howells 5548c3e34a4SDavid Howells /* 5558c3e34a4SDavid Howells * release all the calls associated with a socket 5568c3e34a4SDavid Howells */ 5578c3e34a4SDavid Howells void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) 5588c3e34a4SDavid Howells { 5598c3e34a4SDavid Howells struct rxrpc_call *call; 5608c3e34a4SDavid Howells struct rb_node *p; 5618c3e34a4SDavid Howells 5628c3e34a4SDavid Howells _enter("%p", rx); 5638c3e34a4SDavid Howells 5648c3e34a4SDavid Howells read_lock_bh(&rx->call_lock); 5658c3e34a4SDavid Howells 5668c3e34a4SDavid Howells /* kill the not-yet-accepted incoming calls */ 5678c3e34a4SDavid Howells list_for_each_entry(call, &rx->secureq, accept_link) { 5688c3e34a4SDavid Howells rxrpc_mark_call_released(call); 5698c3e34a4SDavid Howells } 5708c3e34a4SDavid Howells 5718c3e34a4SDavid Howells list_for_each_entry(call, &rx->acceptq, accept_link) { 5728c3e34a4SDavid Howells rxrpc_mark_call_released(call); 5738c3e34a4SDavid Howells } 5748c3e34a4SDavid Howells 575f36b5e44SDavid Howells /* mark all the calls as no longer wanting incoming packets */ 576f36b5e44SDavid Howells for (p = rb_first(&rx->calls); p; p = rb_next(p)) { 577f36b5e44SDavid Howells call = rb_entry(p, struct rxrpc_call, sock_node); 578f36b5e44SDavid Howells rxrpc_mark_call_released(call); 579f36b5e44SDavid Howells } 580f36b5e44SDavid Howells 5818c3e34a4SDavid Howells read_unlock_bh(&rx->call_lock); 5828c3e34a4SDavid Howells _leave(""); 5838c3e34a4SDavid Howells } 5848c3e34a4SDavid Howells 5858c3e34a4SDavid Howells /* 5868c3e34a4SDavid Howells * release a call 5878c3e34a4SDavid Howells */ 5888c3e34a4SDavid Howells void __rxrpc_put_call(struct rxrpc_call *call) 5898c3e34a4SDavid Howells { 5908c3e34a4SDavid Howells ASSERT(call != NULL); 5918c3e34a4SDavid Howells 5928c3e34a4SDavid Howells _enter("%p{u=%d}", call, atomic_read(&call->usage)); 5938c3e34a4SDavid Howells 5948c3e34a4SDavid Howells ASSERTCMP(atomic_read(&call->usage), >, 0); 5958c3e34a4SDavid Howells 5968c3e34a4SDavid Howells if (atomic_dec_and_test(&call->usage)) { 5978c3e34a4SDavid Howells _debug("call %d dead", call->debug_id); 598372ee163SDavid Howells WARN_ON(atomic_read(&call->skb_count) != 0); 5998c3e34a4SDavid Howells ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD); 6008c3e34a4SDavid Howells rxrpc_queue_work(&call->destroyer); 6018c3e34a4SDavid Howells } 6028c3e34a4SDavid Howells _leave(""); 6038c3e34a4SDavid Howells } 6048c3e34a4SDavid Howells 6058c3e34a4SDavid Howells /* 606dee46364SDavid Howells * Final call destruction under RCU. 607dee46364SDavid Howells */ 608dee46364SDavid Howells static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) 609dee46364SDavid Howells { 610dee46364SDavid Howells struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); 611dee46364SDavid Howells 612dee46364SDavid Howells rxrpc_purge_queue(&call->rx_queue); 613df5d8bf7SDavid Howells rxrpc_put_peer(call->peer); 614dee46364SDavid Howells kmem_cache_free(rxrpc_call_jar, call); 615dee46364SDavid Howells } 616dee46364SDavid Howells 617dee46364SDavid Howells /* 6188c3e34a4SDavid Howells * clean up a call 6198c3e34a4SDavid Howells */ 6208c3e34a4SDavid Howells static void rxrpc_cleanup_call(struct rxrpc_call *call) 6218c3e34a4SDavid Howells { 6228c3e34a4SDavid Howells _net("DESTROY CALL %d", call->debug_id); 6238c3e34a4SDavid Howells 6248c3e34a4SDavid Howells ASSERT(call->socket); 6258c3e34a4SDavid Howells 6268c3e34a4SDavid Howells memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); 6278c3e34a4SDavid Howells 6288c3e34a4SDavid Howells del_timer_sync(&call->lifetimer); 6298c3e34a4SDavid Howells del_timer_sync(&call->deadspan); 6308c3e34a4SDavid Howells del_timer_sync(&call->ack_timer); 6318c3e34a4SDavid Howells del_timer_sync(&call->resend_timer); 6328c3e34a4SDavid Howells 6338c3e34a4SDavid Howells ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); 6348c3e34a4SDavid Howells ASSERTCMP(call->events, ==, 0); 6358c3e34a4SDavid Howells if (work_pending(&call->processor)) { 6368c3e34a4SDavid Howells _debug("defer destroy"); 6378c3e34a4SDavid Howells rxrpc_queue_work(&call->destroyer); 6388c3e34a4SDavid Howells return; 6398c3e34a4SDavid Howells } 6408c3e34a4SDavid Howells 641e653cfe4SDavid Howells ASSERTCMP(call->conn, ==, NULL); 6428c3e34a4SDavid Howells 6438c3e34a4SDavid Howells if (call->acks_window) { 6448c3e34a4SDavid Howells _debug("kill Tx window %d", 6458c3e34a4SDavid Howells CIRC_CNT(call->acks_head, call->acks_tail, 6468c3e34a4SDavid Howells call->acks_winsz)); 6478c3e34a4SDavid Howells smp_mb(); 6488c3e34a4SDavid Howells while (CIRC_CNT(call->acks_head, call->acks_tail, 6498c3e34a4SDavid Howells call->acks_winsz) > 0) { 6508c3e34a4SDavid Howells struct rxrpc_skb_priv *sp; 6518c3e34a4SDavid Howells unsigned long _skb; 6528c3e34a4SDavid Howells 6538c3e34a4SDavid Howells _skb = call->acks_window[call->acks_tail] & ~1; 6548c3e34a4SDavid Howells sp = rxrpc_skb((struct sk_buff *)_skb); 6558c3e34a4SDavid Howells _debug("+++ clear Tx %u", sp->hdr.seq); 6568c3e34a4SDavid Howells rxrpc_free_skb((struct sk_buff *)_skb); 6578c3e34a4SDavid Howells call->acks_tail = 6588c3e34a4SDavid Howells (call->acks_tail + 1) & (call->acks_winsz - 1); 6598c3e34a4SDavid Howells } 6608c3e34a4SDavid Howells 6618c3e34a4SDavid Howells kfree(call->acks_window); 6628c3e34a4SDavid Howells } 6638c3e34a4SDavid Howells 6648c3e34a4SDavid Howells rxrpc_free_skb(call->tx_pending); 6658c3e34a4SDavid Howells 6668c3e34a4SDavid Howells rxrpc_purge_queue(&call->rx_queue); 6678c3e34a4SDavid Howells ASSERT(skb_queue_empty(&call->rx_oos_queue)); 6688c3e34a4SDavid Howells sock_put(&call->socket->sk); 669dee46364SDavid Howells call_rcu(&call->rcu, rxrpc_rcu_destroy_call); 6708c3e34a4SDavid Howells } 6718c3e34a4SDavid Howells 6728c3e34a4SDavid Howells /* 6738c3e34a4SDavid Howells * destroy a call 6748c3e34a4SDavid Howells */ 6758c3e34a4SDavid Howells static void rxrpc_destroy_call(struct work_struct *work) 6768c3e34a4SDavid Howells { 6778c3e34a4SDavid Howells struct rxrpc_call *call = 6788c3e34a4SDavid Howells container_of(work, struct rxrpc_call, destroyer); 6798c3e34a4SDavid Howells 68001a90a45SDavid Howells _enter("%p{%d,%x,%p}", 68101a90a45SDavid Howells call, atomic_read(&call->usage), call->cid, call->conn); 6828c3e34a4SDavid Howells 6838c3e34a4SDavid Howells ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD); 6848c3e34a4SDavid Howells 6858c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 6868c3e34a4SDavid Howells list_del_init(&call->link); 6878c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 6888c3e34a4SDavid Howells 6898c3e34a4SDavid Howells rxrpc_cleanup_call(call); 6908c3e34a4SDavid Howells _leave(""); 6918c3e34a4SDavid Howells } 6928c3e34a4SDavid Howells 6938c3e34a4SDavid Howells /* 6948c3e34a4SDavid Howells * preemptively destroy all the call records from a transport endpoint rather 6958c3e34a4SDavid Howells * than waiting for them to time out 6968c3e34a4SDavid Howells */ 6978c3e34a4SDavid Howells void __exit rxrpc_destroy_all_calls(void) 6988c3e34a4SDavid Howells { 6998c3e34a4SDavid Howells struct rxrpc_call *call; 7008c3e34a4SDavid Howells 7018c3e34a4SDavid Howells _enter(""); 7028c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 7038c3e34a4SDavid Howells 7048c3e34a4SDavid Howells while (!list_empty(&rxrpc_calls)) { 7058c3e34a4SDavid Howells call = list_entry(rxrpc_calls.next, struct rxrpc_call, link); 7068c3e34a4SDavid Howells _debug("Zapping call %p", call); 7078c3e34a4SDavid Howells 7088c3e34a4SDavid Howells list_del_init(&call->link); 7098c3e34a4SDavid Howells 7108c3e34a4SDavid Howells switch (atomic_read(&call->usage)) { 7118c3e34a4SDavid Howells case 0: 7128c3e34a4SDavid Howells ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD); 7138c3e34a4SDavid Howells break; 7148c3e34a4SDavid Howells case 1: 7158c3e34a4SDavid Howells if (del_timer_sync(&call->deadspan) != 0 && 7168c3e34a4SDavid Howells call->state != RXRPC_CALL_DEAD) 7178c3e34a4SDavid Howells rxrpc_dead_call_expired((unsigned long) call); 7188c3e34a4SDavid Howells if (call->state != RXRPC_CALL_DEAD) 7198c3e34a4SDavid Howells break; 7208c3e34a4SDavid Howells default: 7218c3e34a4SDavid Howells pr_err("Call %p still in use (%d,%d,%s,%lx,%lx)!\n", 7228c3e34a4SDavid Howells call, atomic_read(&call->usage), 7238c3e34a4SDavid Howells atomic_read(&call->ackr_not_idle), 7248c3e34a4SDavid Howells rxrpc_call_states[call->state], 7258c3e34a4SDavid Howells call->flags, call->events); 7268c3e34a4SDavid Howells if (!skb_queue_empty(&call->rx_queue)) 7278c3e34a4SDavid Howells pr_err("Rx queue occupied\n"); 7288c3e34a4SDavid Howells if (!skb_queue_empty(&call->rx_oos_queue)) 7298c3e34a4SDavid Howells pr_err("OOS queue occupied\n"); 7308c3e34a4SDavid Howells break; 7318c3e34a4SDavid Howells } 7328c3e34a4SDavid Howells 7338c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 7348c3e34a4SDavid Howells cond_resched(); 7358c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 7368c3e34a4SDavid Howells } 7378c3e34a4SDavid Howells 7388c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 7398c3e34a4SDavid Howells _leave(""); 7408c3e34a4SDavid Howells } 7418c3e34a4SDavid Howells 7428c3e34a4SDavid Howells /* 7438c3e34a4SDavid Howells * handle call lifetime being exceeded 7448c3e34a4SDavid Howells */ 7458c3e34a4SDavid Howells static void rxrpc_call_life_expired(unsigned long _call) 7468c3e34a4SDavid Howells { 7478c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7488c3e34a4SDavid Howells 749f5c17aaeSDavid Howells _enter("{%d}", call->debug_id); 750f5c17aaeSDavid Howells 7518c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7528c3e34a4SDavid Howells return; 7538c3e34a4SDavid Howells 7548c3e34a4SDavid Howells set_bit(RXRPC_CALL_EV_LIFE_TIMER, &call->events); 7558c3e34a4SDavid Howells rxrpc_queue_call(call); 7568c3e34a4SDavid Howells } 7578c3e34a4SDavid Howells 7588c3e34a4SDavid Howells /* 7598c3e34a4SDavid Howells * handle resend timer expiry 7608c3e34a4SDavid Howells * - may not take call->state_lock as this can deadlock against del_timer_sync() 7618c3e34a4SDavid Howells */ 7628c3e34a4SDavid Howells static void rxrpc_resend_time_expired(unsigned long _call) 7638c3e34a4SDavid Howells { 7648c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7658c3e34a4SDavid Howells 7668c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7678c3e34a4SDavid Howells 7688c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7698c3e34a4SDavid Howells return; 7708c3e34a4SDavid Howells 7718c3e34a4SDavid Howells clear_bit(RXRPC_CALL_RUN_RTIMER, &call->flags); 7728c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_RESEND_TIMER, &call->events)) 7738c3e34a4SDavid Howells rxrpc_queue_call(call); 7748c3e34a4SDavid Howells } 7758c3e34a4SDavid Howells 7768c3e34a4SDavid Howells /* 7778c3e34a4SDavid Howells * handle ACK timer expiry 7788c3e34a4SDavid Howells */ 7798c3e34a4SDavid Howells static void rxrpc_ack_time_expired(unsigned long _call) 7808c3e34a4SDavid Howells { 7818c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7828c3e34a4SDavid Howells 7838c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7848c3e34a4SDavid Howells 7858c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7868c3e34a4SDavid Howells return; 7878c3e34a4SDavid Howells 788f5c17aaeSDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_ACK, &call->events)) 7898c3e34a4SDavid Howells rxrpc_queue_call(call); 7908c3e34a4SDavid Howells } 791