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", 468c3e34a4SDavid Howells [RXRPC_CALL_SERVER_BUSY] = "SvBusy ", 478c3e34a4SDavid Howells [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort", 488c3e34a4SDavid Howells [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort", 498c3e34a4SDavid Howells [RXRPC_CALL_NETWORK_ERROR] = "NetError", 508c3e34a4SDavid Howells [RXRPC_CALL_DEAD] = "Dead ", 518c3e34a4SDavid Howells }; 528c3e34a4SDavid Howells 538c3e34a4SDavid Howells struct kmem_cache *rxrpc_call_jar; 548c3e34a4SDavid Howells LIST_HEAD(rxrpc_calls); 558c3e34a4SDavid Howells DEFINE_RWLOCK(rxrpc_call_lock); 568c3e34a4SDavid Howells 578c3e34a4SDavid Howells static void rxrpc_destroy_call(struct work_struct *work); 588c3e34a4SDavid Howells static void rxrpc_call_life_expired(unsigned long _call); 598c3e34a4SDavid Howells static void rxrpc_dead_call_expired(unsigned long _call); 608c3e34a4SDavid Howells static void rxrpc_ack_time_expired(unsigned long _call); 618c3e34a4SDavid Howells static void rxrpc_resend_time_expired(unsigned long _call); 628c3e34a4SDavid Howells 638c3e34a4SDavid Howells /* 648c3e34a4SDavid Howells * find an extant server call 658c3e34a4SDavid Howells * - called in process context with IRQs enabled 668c3e34a4SDavid Howells */ 678c3e34a4SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, 688c3e34a4SDavid Howells unsigned long user_call_ID) 698c3e34a4SDavid Howells { 708c3e34a4SDavid Howells struct rxrpc_call *call; 718c3e34a4SDavid Howells struct rb_node *p; 728c3e34a4SDavid Howells 738c3e34a4SDavid Howells _enter("%p,%lx", rx, user_call_ID); 748c3e34a4SDavid Howells 758c3e34a4SDavid Howells read_lock(&rx->call_lock); 768c3e34a4SDavid Howells 778c3e34a4SDavid Howells p = rx->calls.rb_node; 788c3e34a4SDavid Howells while (p) { 798c3e34a4SDavid Howells call = rb_entry(p, struct rxrpc_call, sock_node); 808c3e34a4SDavid Howells 818c3e34a4SDavid Howells if (user_call_ID < call->user_call_ID) 828c3e34a4SDavid Howells p = p->rb_left; 838c3e34a4SDavid Howells else if (user_call_ID > call->user_call_ID) 848c3e34a4SDavid Howells p = p->rb_right; 858c3e34a4SDavid Howells else 868c3e34a4SDavid Howells goto found_extant_call; 878c3e34a4SDavid Howells } 888c3e34a4SDavid Howells 898c3e34a4SDavid Howells read_unlock(&rx->call_lock); 908c3e34a4SDavid Howells _leave(" = NULL"); 918c3e34a4SDavid Howells return NULL; 928c3e34a4SDavid Howells 938c3e34a4SDavid Howells found_extant_call: 948c3e34a4SDavid Howells rxrpc_get_call(call); 958c3e34a4SDavid Howells read_unlock(&rx->call_lock); 968c3e34a4SDavid Howells _leave(" = %p [%d]", call, atomic_read(&call->usage)); 978c3e34a4SDavid Howells return call; 988c3e34a4SDavid Howells } 998c3e34a4SDavid Howells 1008c3e34a4SDavid Howells /* 1018c3e34a4SDavid Howells * allocate a new call 1028c3e34a4SDavid Howells */ 1038c3e34a4SDavid Howells static struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp) 1048c3e34a4SDavid Howells { 1058c3e34a4SDavid Howells struct rxrpc_call *call; 1068c3e34a4SDavid Howells 1078c3e34a4SDavid Howells call = kmem_cache_zalloc(rxrpc_call_jar, gfp); 1088c3e34a4SDavid Howells if (!call) 1098c3e34a4SDavid Howells return NULL; 1108c3e34a4SDavid Howells 1118c3e34a4SDavid Howells call->acks_winsz = 16; 1128c3e34a4SDavid Howells call->acks_window = kmalloc(call->acks_winsz * sizeof(unsigned long), 1138c3e34a4SDavid Howells gfp); 1148c3e34a4SDavid Howells if (!call->acks_window) { 1158c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, call); 1168c3e34a4SDavid Howells return NULL; 1178c3e34a4SDavid Howells } 1188c3e34a4SDavid Howells 1198c3e34a4SDavid Howells setup_timer(&call->lifetimer, &rxrpc_call_life_expired, 1208c3e34a4SDavid Howells (unsigned long) call); 1218c3e34a4SDavid Howells setup_timer(&call->deadspan, &rxrpc_dead_call_expired, 1228c3e34a4SDavid Howells (unsigned long) call); 1238c3e34a4SDavid Howells setup_timer(&call->ack_timer, &rxrpc_ack_time_expired, 1248c3e34a4SDavid Howells (unsigned long) call); 1258c3e34a4SDavid Howells setup_timer(&call->resend_timer, &rxrpc_resend_time_expired, 1268c3e34a4SDavid Howells (unsigned long) call); 1278c3e34a4SDavid Howells INIT_WORK(&call->destroyer, &rxrpc_destroy_call); 1288c3e34a4SDavid Howells INIT_WORK(&call->processor, &rxrpc_process_call); 129999b69f8SDavid Howells INIT_LIST_HEAD(&call->link); 13045025bceSDavid Howells INIT_LIST_HEAD(&call->chan_wait_link); 1318c3e34a4SDavid Howells INIT_LIST_HEAD(&call->accept_link); 1328c3e34a4SDavid Howells skb_queue_head_init(&call->rx_queue); 1338c3e34a4SDavid Howells skb_queue_head_init(&call->rx_oos_queue); 13445025bceSDavid Howells init_waitqueue_head(&call->waitq); 1358c3e34a4SDavid Howells spin_lock_init(&call->lock); 1368c3e34a4SDavid Howells rwlock_init(&call->state_lock); 1378c3e34a4SDavid Howells atomic_set(&call->usage, 1); 1388c3e34a4SDavid Howells call->debug_id = atomic_inc_return(&rxrpc_debug_id); 1398c3e34a4SDavid Howells 1408c3e34a4SDavid Howells memset(&call->sock_node, 0xed, sizeof(call->sock_node)); 1418c3e34a4SDavid Howells 1428c3e34a4SDavid Howells call->rx_data_expect = 1; 1438c3e34a4SDavid Howells call->rx_data_eaten = 0; 1448c3e34a4SDavid Howells call->rx_first_oos = 0; 1458c3e34a4SDavid Howells call->ackr_win_top = call->rx_data_eaten + 1 + rxrpc_rx_window_size; 1468c3e34a4SDavid Howells call->creation_jif = jiffies; 1478c3e34a4SDavid Howells return call; 1488c3e34a4SDavid Howells } 1498c3e34a4SDavid Howells 1508c3e34a4SDavid Howells /* 151999b69f8SDavid Howells * Allocate a new client call. 1528c3e34a4SDavid Howells */ 153aa390bbeSDavid Howells static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx, 154999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 1558c3e34a4SDavid Howells gfp_t gfp) 1568c3e34a4SDavid Howells { 1578c3e34a4SDavid Howells struct rxrpc_call *call; 1588c3e34a4SDavid Howells 1598c3e34a4SDavid Howells _enter(""); 1608c3e34a4SDavid Howells 161999b69f8SDavid Howells ASSERT(rx->local != NULL); 1628c3e34a4SDavid Howells 1638c3e34a4SDavid Howells call = rxrpc_alloc_call(gfp); 1648c3e34a4SDavid Howells if (!call) 1658c3e34a4SDavid Howells return ERR_PTR(-ENOMEM); 166999b69f8SDavid Howells call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; 1678c3e34a4SDavid Howells 1688c3e34a4SDavid Howells sock_hold(&rx->sk); 1698c3e34a4SDavid Howells call->socket = rx; 1708c3e34a4SDavid Howells call->rx_data_post = 1; 171999b69f8SDavid Howells call->service_id = srx->srx_service; 172999b69f8SDavid Howells 173999b69f8SDavid Howells _leave(" = %p", call); 174999b69f8SDavid Howells return call; 175999b69f8SDavid Howells } 176999b69f8SDavid Howells 177999b69f8SDavid Howells /* 178999b69f8SDavid Howells * Begin client call. 179999b69f8SDavid Howells */ 180999b69f8SDavid Howells static int rxrpc_begin_client_call(struct rxrpc_call *call, 181999b69f8SDavid Howells struct rxrpc_conn_parameters *cp, 182999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 183999b69f8SDavid Howells gfp_t gfp) 184999b69f8SDavid Howells { 185999b69f8SDavid Howells int ret; 186999b69f8SDavid Howells 187999b69f8SDavid Howells /* Set up or get a connection record and set the protocol parameters, 188999b69f8SDavid Howells * including channel number and call ID. 189999b69f8SDavid Howells */ 190aa390bbeSDavid Howells ret = rxrpc_connect_call(call, cp, srx, gfp); 191999b69f8SDavid Howells if (ret < 0) 192999b69f8SDavid Howells return ret; 193999b69f8SDavid Howells 194999b69f8SDavid Howells call->state = RXRPC_CALL_CLIENT_SEND_REQUEST; 195999b69f8SDavid Howells 19685f32278SDavid Howells spin_lock(&call->conn->params.peer->lock); 19785f32278SDavid Howells hlist_add_head(&call->error_link, &call->conn->params.peer->error_targets); 19885f32278SDavid Howells spin_unlock(&call->conn->params.peer->lock); 1998c3e34a4SDavid Howells 2008c3e34a4SDavid Howells call->lifetimer.expires = jiffies + rxrpc_max_call_lifetime; 2018c3e34a4SDavid Howells add_timer(&call->lifetimer); 202999b69f8SDavid Howells return 0; 2038c3e34a4SDavid Howells } 2048c3e34a4SDavid Howells 2058c3e34a4SDavid Howells /* 2068c3e34a4SDavid Howells * set up a call for the given data 2078c3e34a4SDavid Howells * - called in process context with IRQs enabled 2088c3e34a4SDavid Howells */ 2098c3e34a4SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, 21019ffa01cSDavid Howells struct rxrpc_conn_parameters *cp, 211999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 2128c3e34a4SDavid Howells unsigned long user_call_ID, 2138c3e34a4SDavid Howells gfp_t gfp) 2148c3e34a4SDavid Howells { 2158c3e34a4SDavid Howells struct rxrpc_call *call, *xcall; 2168c3e34a4SDavid Howells struct rb_node *parent, **pp; 217999b69f8SDavid Howells int ret; 2188c3e34a4SDavid Howells 219999b69f8SDavid Howells _enter("%p,%lx", rx, user_call_ID); 2208c3e34a4SDavid Howells 221aa390bbeSDavid Howells call = rxrpc_alloc_client_call(rx, srx, gfp); 2228c3e34a4SDavid Howells if (IS_ERR(call)) { 2238c3e34a4SDavid Howells _leave(" = %ld", PTR_ERR(call)); 2248c3e34a4SDavid Howells return call; 2258c3e34a4SDavid Howells } 2268c3e34a4SDavid Howells 227999b69f8SDavid Howells /* Publish the call, even though it is incompletely set up as yet */ 2288c3e34a4SDavid Howells call->user_call_ID = user_call_ID; 2298c3e34a4SDavid Howells __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); 2308c3e34a4SDavid Howells 2318c3e34a4SDavid Howells write_lock(&rx->call_lock); 2328c3e34a4SDavid Howells 2338c3e34a4SDavid Howells pp = &rx->calls.rb_node; 2348c3e34a4SDavid Howells parent = NULL; 2358c3e34a4SDavid Howells while (*pp) { 2368c3e34a4SDavid Howells parent = *pp; 2378c3e34a4SDavid Howells xcall = rb_entry(parent, struct rxrpc_call, sock_node); 2388c3e34a4SDavid Howells 2398c3e34a4SDavid Howells if (user_call_ID < xcall->user_call_ID) 2408c3e34a4SDavid Howells pp = &(*pp)->rb_left; 2418c3e34a4SDavid Howells else if (user_call_ID > xcall->user_call_ID) 2428c3e34a4SDavid Howells pp = &(*pp)->rb_right; 2438c3e34a4SDavid Howells else 2448c3e34a4SDavid Howells goto found_user_ID_now_present; 2458c3e34a4SDavid Howells } 2468c3e34a4SDavid Howells 2478c3e34a4SDavid Howells rxrpc_get_call(call); 2488c3e34a4SDavid Howells 2498c3e34a4SDavid Howells rb_link_node(&call->sock_node, parent, pp); 2508c3e34a4SDavid Howells rb_insert_color(&call->sock_node, &rx->calls); 2518c3e34a4SDavid Howells write_unlock(&rx->call_lock); 2528c3e34a4SDavid Howells 2538c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 2548c3e34a4SDavid Howells list_add_tail(&call->link, &rxrpc_calls); 2558c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 2568c3e34a4SDavid Howells 257aa390bbeSDavid Howells ret = rxrpc_begin_client_call(call, cp, srx, gfp); 258999b69f8SDavid Howells if (ret < 0) 259999b69f8SDavid Howells goto error; 260999b69f8SDavid Howells 2618c3e34a4SDavid Howells _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); 2628c3e34a4SDavid Howells 2638c3e34a4SDavid Howells _leave(" = %p [new]", call); 2648c3e34a4SDavid Howells return call; 2658c3e34a4SDavid Howells 266999b69f8SDavid Howells error: 267999b69f8SDavid Howells write_lock(&rx->call_lock); 268999b69f8SDavid Howells rb_erase(&call->sock_node, &rx->calls); 269999b69f8SDavid Howells write_unlock(&rx->call_lock); 270999b69f8SDavid Howells rxrpc_put_call(call); 271999b69f8SDavid Howells 272999b69f8SDavid Howells write_lock_bh(&rxrpc_call_lock); 273d1e858c5SDavid Howells list_del_init(&call->link); 274999b69f8SDavid Howells write_unlock_bh(&rxrpc_call_lock); 275999b69f8SDavid Howells 27617b963e3SDavid Howells set_bit(RXRPC_CALL_RELEASED, &call->flags); 277d1e858c5SDavid Howells call->state = RXRPC_CALL_DEAD; 278999b69f8SDavid Howells rxrpc_put_call(call); 279999b69f8SDavid Howells _leave(" = %d", ret); 280999b69f8SDavid Howells return ERR_PTR(ret); 281999b69f8SDavid Howells 2828c3e34a4SDavid Howells /* We unexpectedly found the user ID in the list after taking 2838c3e34a4SDavid Howells * the call_lock. This shouldn't happen unless the user races 2848c3e34a4SDavid Howells * with itself and tries to add the same user ID twice at the 2858c3e34a4SDavid Howells * same time in different threads. 2868c3e34a4SDavid Howells */ 2878c3e34a4SDavid Howells found_user_ID_now_present: 2888c3e34a4SDavid Howells write_unlock(&rx->call_lock); 28917b963e3SDavid Howells set_bit(RXRPC_CALL_RELEASED, &call->flags); 290d1e858c5SDavid Howells call->state = RXRPC_CALL_DEAD; 2918c3e34a4SDavid Howells rxrpc_put_call(call); 2928c3e34a4SDavid Howells _leave(" = -EEXIST [%p]", call); 2938c3e34a4SDavid Howells return ERR_PTR(-EEXIST); 2948c3e34a4SDavid Howells } 2958c3e34a4SDavid Howells 2968c3e34a4SDavid Howells /* 2978c3e34a4SDavid Howells * set up an incoming call 2988c3e34a4SDavid Howells * - called in process context with IRQs enabled 2998c3e34a4SDavid Howells */ 3008c3e34a4SDavid Howells struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *rx, 3018c3e34a4SDavid Howells struct rxrpc_connection *conn, 30242886ffeSDavid Howells struct sk_buff *skb) 3038c3e34a4SDavid Howells { 30442886ffeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 3058c3e34a4SDavid Howells struct rxrpc_call *call, *candidate; 306a1399f8bSDavid Howells u32 call_id, chan; 3078c3e34a4SDavid Howells 3088c3e34a4SDavid Howells _enter(",%d", conn->debug_id); 3098c3e34a4SDavid Howells 3108c3e34a4SDavid Howells ASSERT(rx != NULL); 3118c3e34a4SDavid Howells 3128c3e34a4SDavid Howells candidate = rxrpc_alloc_call(GFP_NOIO); 3138c3e34a4SDavid Howells if (!candidate) 3148c3e34a4SDavid Howells return ERR_PTR(-EBUSY); 3158c3e34a4SDavid Howells 316a1399f8bSDavid Howells chan = sp->hdr.cid & RXRPC_CHANNELMASK; 3178c3e34a4SDavid Howells candidate->socket = rx; 3188c3e34a4SDavid Howells candidate->conn = conn; 319df5d8bf7SDavid Howells candidate->peer = conn->params.peer; 32042886ffeSDavid Howells candidate->cid = sp->hdr.cid; 32142886ffeSDavid Howells candidate->call_id = sp->hdr.callNumber; 3228c3e34a4SDavid Howells candidate->rx_data_post = 0; 3238c3e34a4SDavid Howells candidate->state = RXRPC_CALL_SERVER_ACCEPTING; 324dabe5a79SDavid Howells candidate->flags |= (1 << RXRPC_CALL_IS_SERVICE); 3258c3e34a4SDavid Howells if (conn->security_ix > 0) 3268c3e34a4SDavid Howells candidate->state = RXRPC_CALL_SERVER_SECURING; 3278c3e34a4SDavid Howells 328a1399f8bSDavid Howells spin_lock(&conn->channel_lock); 3298c3e34a4SDavid Howells 3308c3e34a4SDavid Howells /* set the channel for this call */ 331a1399f8bSDavid Howells call = rcu_dereference_protected(conn->channels[chan].call, 332a1399f8bSDavid Howells lockdep_is_held(&conn->channel_lock)); 333a1399f8bSDavid Howells 33401a90a45SDavid Howells _debug("channel[%u] is %p", candidate->cid & RXRPC_CHANNELMASK, call); 33542886ffeSDavid Howells if (call && call->call_id == sp->hdr.callNumber) { 3368c3e34a4SDavid Howells /* already set; must've been a duplicate packet */ 3378c3e34a4SDavid Howells _debug("extant call [%d]", call->state); 3388c3e34a4SDavid Howells ASSERTCMP(call->conn, ==, conn); 3398c3e34a4SDavid Howells 3408c3e34a4SDavid Howells read_lock(&call->state_lock); 3418c3e34a4SDavid Howells switch (call->state) { 3428c3e34a4SDavid Howells case RXRPC_CALL_LOCALLY_ABORTED: 3438c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events)) 3448c3e34a4SDavid Howells rxrpc_queue_call(call); 3458c3e34a4SDavid Howells case RXRPC_CALL_REMOTELY_ABORTED: 3468c3e34a4SDavid Howells read_unlock(&call->state_lock); 3478c3e34a4SDavid Howells goto aborted_call; 3488c3e34a4SDavid Howells default: 3498c3e34a4SDavid Howells rxrpc_get_call(call); 3508c3e34a4SDavid Howells read_unlock(&call->state_lock); 3518c3e34a4SDavid Howells goto extant_call; 3528c3e34a4SDavid Howells } 3538c3e34a4SDavid Howells } 3548c3e34a4SDavid Howells 3558c3e34a4SDavid Howells if (call) { 3568c3e34a4SDavid Howells /* it seems the channel is still in use from the previous call 3578c3e34a4SDavid Howells * - ditch the old binding if its call is now complete */ 3588c3e34a4SDavid Howells _debug("CALL: %u { %s }", 3598c3e34a4SDavid Howells call->debug_id, rxrpc_call_states[call->state]); 3608c3e34a4SDavid Howells 3618c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) { 36245025bceSDavid Howells __rxrpc_disconnect_call(conn, call); 3638c3e34a4SDavid Howells } else { 364a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3658c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 3668c3e34a4SDavid Howells _leave(" = -EBUSY"); 3678c3e34a4SDavid Howells return ERR_PTR(-EBUSY); 3688c3e34a4SDavid Howells } 3698c3e34a4SDavid Howells } 3708c3e34a4SDavid Howells 3718c3e34a4SDavid Howells /* check the call number isn't duplicate */ 3728c3e34a4SDavid Howells _debug("check dup"); 37342886ffeSDavid Howells call_id = sp->hdr.callNumber; 3748c3e34a4SDavid Howells 375a1399f8bSDavid Howells /* We just ignore calls prior to the current call ID. Terminated calls 376a1399f8bSDavid Howells * are handled via the connection. 3778c3e34a4SDavid Howells */ 378a1399f8bSDavid Howells if (call_id <= conn->channels[chan].call_counter) 379a1399f8bSDavid Howells goto old_call; /* TODO: Just drop packet */ 3808c3e34a4SDavid Howells 3818c3e34a4SDavid Howells /* make the call available */ 3828c3e34a4SDavid Howells _debug("new call"); 3838c3e34a4SDavid Howells call = candidate; 3848c3e34a4SDavid Howells candidate = NULL; 385a1399f8bSDavid Howells conn->channels[chan].call_counter = call_id; 386a1399f8bSDavid Howells rcu_assign_pointer(conn->channels[chan].call, call); 3878c3e34a4SDavid Howells sock_hold(&rx->sk); 3885627cc8bSDavid Howells rxrpc_get_connection(conn); 389df5d8bf7SDavid Howells rxrpc_get_peer(call->peer); 390a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3918c3e34a4SDavid Howells 39285f32278SDavid Howells spin_lock(&conn->params.peer->lock); 39385f32278SDavid Howells hlist_add_head(&call->error_link, &conn->params.peer->error_targets); 39485f32278SDavid Howells spin_unlock(&conn->params.peer->lock); 3958c3e34a4SDavid Howells 3968c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 3978c3e34a4SDavid Howells list_add_tail(&call->link, &rxrpc_calls); 3988c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 3998c3e34a4SDavid Howells 40019ffa01cSDavid Howells call->service_id = conn->params.service_id; 4018c3e34a4SDavid Howells 4028c3e34a4SDavid Howells _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); 4038c3e34a4SDavid Howells 4048c3e34a4SDavid Howells call->lifetimer.expires = jiffies + rxrpc_max_call_lifetime; 4058c3e34a4SDavid Howells add_timer(&call->lifetimer); 4068c3e34a4SDavid Howells _leave(" = %p {%d} [new]", call, call->debug_id); 4078c3e34a4SDavid Howells return call; 4088c3e34a4SDavid Howells 4098c3e34a4SDavid Howells extant_call: 410a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4118c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4128c3e34a4SDavid Howells _leave(" = %p {%d} [extant]", call, call ? call->debug_id : -1); 4138c3e34a4SDavid Howells return call; 4148c3e34a4SDavid Howells 4158c3e34a4SDavid Howells aborted_call: 416a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4178c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4188c3e34a4SDavid Howells _leave(" = -ECONNABORTED"); 4198c3e34a4SDavid Howells return ERR_PTR(-ECONNABORTED); 4208c3e34a4SDavid Howells 4218c3e34a4SDavid Howells old_call: 422a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4238c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4248c3e34a4SDavid Howells _leave(" = -ECONNRESET [old]"); 4258c3e34a4SDavid Howells return ERR_PTR(-ECONNRESET); 4268c3e34a4SDavid Howells } 4278c3e34a4SDavid Howells 4288c3e34a4SDavid Howells /* 4298c3e34a4SDavid Howells * detach a call from a socket and set up for release 4308c3e34a4SDavid Howells */ 4318c3e34a4SDavid Howells void rxrpc_release_call(struct rxrpc_call *call) 4328c3e34a4SDavid Howells { 4338c3e34a4SDavid Howells struct rxrpc_connection *conn = call->conn; 4348c3e34a4SDavid Howells struct rxrpc_sock *rx = call->socket; 4358c3e34a4SDavid Howells 4368c3e34a4SDavid Howells _enter("{%d,%d,%d,%d}", 4378c3e34a4SDavid Howells call->debug_id, atomic_read(&call->usage), 4388c3e34a4SDavid Howells atomic_read(&call->ackr_not_idle), 4398c3e34a4SDavid Howells call->rx_first_oos); 4408c3e34a4SDavid Howells 4418c3e34a4SDavid Howells spin_lock_bh(&call->lock); 4428c3e34a4SDavid Howells if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) 4438c3e34a4SDavid Howells BUG(); 4448c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 4458c3e34a4SDavid Howells 4468c3e34a4SDavid Howells /* dissociate from the socket 4478c3e34a4SDavid Howells * - the socket's ref on the call is passed to the death timer 4488c3e34a4SDavid Howells */ 4498c3e34a4SDavid Howells _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); 4508c3e34a4SDavid Howells 451e653cfe4SDavid Howells spin_lock(&conn->params.peer->lock); 452e653cfe4SDavid Howells hlist_del_init(&call->error_link); 453e653cfe4SDavid Howells spin_unlock(&conn->params.peer->lock); 454e653cfe4SDavid Howells 4558c3e34a4SDavid Howells write_lock_bh(&rx->call_lock); 4568c3e34a4SDavid Howells if (!list_empty(&call->accept_link)) { 4578c3e34a4SDavid Howells _debug("unlinking once-pending call %p { e=%lx f=%lx }", 4588c3e34a4SDavid Howells call, call->events, call->flags); 4598c3e34a4SDavid Howells ASSERT(!test_bit(RXRPC_CALL_HAS_USERID, &call->flags)); 4608c3e34a4SDavid Howells list_del_init(&call->accept_link); 4618c3e34a4SDavid Howells sk_acceptq_removed(&rx->sk); 4628c3e34a4SDavid Howells } else if (test_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { 4638c3e34a4SDavid Howells rb_erase(&call->sock_node, &rx->calls); 4648c3e34a4SDavid Howells memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); 4658c3e34a4SDavid Howells clear_bit(RXRPC_CALL_HAS_USERID, &call->flags); 4668c3e34a4SDavid Howells } 4678c3e34a4SDavid Howells write_unlock_bh(&rx->call_lock); 4688c3e34a4SDavid Howells 4698c3e34a4SDavid Howells /* free up the channel for reuse */ 470a1399f8bSDavid Howells write_lock_bh(&call->state_lock); 4718c3e34a4SDavid Howells 4728c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE && 4738c3e34a4SDavid Howells call->state != RXRPC_CALL_CLIENT_FINAL_ACK) { 4748c3e34a4SDavid Howells _debug("+++ ABORTING STATE %d +++\n", call->state); 4758c3e34a4SDavid Howells call->state = RXRPC_CALL_LOCALLY_ABORTED; 4768c3e34a4SDavid Howells call->local_abort = RX_CALL_DEAD; 4778c3e34a4SDavid Howells } 478a1399f8bSDavid Howells write_unlock_bh(&call->state_lock); 4798c3e34a4SDavid Howells 480e653cfe4SDavid Howells rxrpc_disconnect_call(call); 481e653cfe4SDavid Howells 4828c3e34a4SDavid Howells /* clean up the Rx queue */ 4838c3e34a4SDavid Howells if (!skb_queue_empty(&call->rx_queue) || 4848c3e34a4SDavid Howells !skb_queue_empty(&call->rx_oos_queue)) { 4858c3e34a4SDavid Howells struct rxrpc_skb_priv *sp; 4868c3e34a4SDavid Howells struct sk_buff *skb; 4878c3e34a4SDavid Howells 4888c3e34a4SDavid Howells _debug("purge Rx queues"); 4898c3e34a4SDavid Howells 4908c3e34a4SDavid Howells spin_lock_bh(&call->lock); 4918c3e34a4SDavid Howells while ((skb = skb_dequeue(&call->rx_queue)) || 4928c3e34a4SDavid Howells (skb = skb_dequeue(&call->rx_oos_queue))) { 4938c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 4948c3e34a4SDavid Howells 49555cae7a4SArnd Bergmann sp = rxrpc_skb(skb); 4968c3e34a4SDavid Howells _debug("- zap %s %%%u #%u", 4978c3e34a4SDavid Howells rxrpc_pkts[sp->hdr.type], 4988c3e34a4SDavid Howells sp->hdr.serial, sp->hdr.seq); 4998c3e34a4SDavid Howells rxrpc_free_skb(skb); 5008c3e34a4SDavid Howells spin_lock_bh(&call->lock); 5018c3e34a4SDavid Howells } 5028c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 5038c3e34a4SDavid Howells 5048c3e34a4SDavid Howells ASSERTCMP(call->state, !=, RXRPC_CALL_COMPLETE); 5058c3e34a4SDavid Howells } 5068c3e34a4SDavid Howells 5078c3e34a4SDavid Howells del_timer_sync(&call->resend_timer); 5088c3e34a4SDavid Howells del_timer_sync(&call->ack_timer); 5098c3e34a4SDavid Howells del_timer_sync(&call->lifetimer); 5108c3e34a4SDavid Howells call->deadspan.expires = jiffies + rxrpc_dead_call_expiry; 5118c3e34a4SDavid Howells add_timer(&call->deadspan); 5128c3e34a4SDavid Howells 5138c3e34a4SDavid Howells _leave(""); 5148c3e34a4SDavid Howells } 5158c3e34a4SDavid Howells 5168c3e34a4SDavid Howells /* 5178c3e34a4SDavid Howells * handle a dead call being ready for reaping 5188c3e34a4SDavid Howells */ 5198c3e34a4SDavid Howells static void rxrpc_dead_call_expired(unsigned long _call) 5208c3e34a4SDavid Howells { 5218c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 5228c3e34a4SDavid Howells 5238c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 5248c3e34a4SDavid Howells 5258c3e34a4SDavid Howells write_lock_bh(&call->state_lock); 5268c3e34a4SDavid Howells call->state = RXRPC_CALL_DEAD; 5278c3e34a4SDavid Howells write_unlock_bh(&call->state_lock); 5288c3e34a4SDavid Howells rxrpc_put_call(call); 5298c3e34a4SDavid Howells } 5308c3e34a4SDavid Howells 5318c3e34a4SDavid Howells /* 5328c3e34a4SDavid Howells * mark a call as to be released, aborting it if it's still in progress 5338c3e34a4SDavid Howells * - called with softirqs disabled 5348c3e34a4SDavid Howells */ 5358c3e34a4SDavid Howells static void rxrpc_mark_call_released(struct rxrpc_call *call) 5368c3e34a4SDavid Howells { 5378c3e34a4SDavid Howells bool sched; 5388c3e34a4SDavid Howells 5398c3e34a4SDavid Howells write_lock(&call->state_lock); 5408c3e34a4SDavid Howells if (call->state < RXRPC_CALL_DEAD) { 5418c3e34a4SDavid Howells sched = false; 5428c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 5438c3e34a4SDavid Howells _debug("abort call %p", call); 5448c3e34a4SDavid Howells call->state = RXRPC_CALL_LOCALLY_ABORTED; 5458c3e34a4SDavid Howells call->local_abort = RX_CALL_DEAD; 5468c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events)) 5478c3e34a4SDavid Howells sched = true; 5488c3e34a4SDavid Howells } 5498c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_RELEASE, &call->events)) 5508c3e34a4SDavid Howells sched = true; 5518c3e34a4SDavid Howells if (sched) 5528c3e34a4SDavid Howells rxrpc_queue_call(call); 5538c3e34a4SDavid Howells } 5548c3e34a4SDavid Howells write_unlock(&call->state_lock); 5558c3e34a4SDavid Howells } 5568c3e34a4SDavid Howells 5578c3e34a4SDavid Howells /* 5588c3e34a4SDavid Howells * release all the calls associated with a socket 5598c3e34a4SDavid Howells */ 5608c3e34a4SDavid Howells void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) 5618c3e34a4SDavid Howells { 5628c3e34a4SDavid Howells struct rxrpc_call *call; 5638c3e34a4SDavid Howells struct rb_node *p; 5648c3e34a4SDavid Howells 5658c3e34a4SDavid Howells _enter("%p", rx); 5668c3e34a4SDavid Howells 5678c3e34a4SDavid Howells read_lock_bh(&rx->call_lock); 5688c3e34a4SDavid Howells 5698c3e34a4SDavid Howells /* kill the not-yet-accepted incoming calls */ 5708c3e34a4SDavid Howells list_for_each_entry(call, &rx->secureq, accept_link) { 5718c3e34a4SDavid Howells rxrpc_mark_call_released(call); 5728c3e34a4SDavid Howells } 5738c3e34a4SDavid Howells 5748c3e34a4SDavid Howells list_for_each_entry(call, &rx->acceptq, accept_link) { 5758c3e34a4SDavid Howells rxrpc_mark_call_released(call); 5768c3e34a4SDavid Howells } 5778c3e34a4SDavid Howells 578f36b5e44SDavid Howells /* mark all the calls as no longer wanting incoming packets */ 579f36b5e44SDavid Howells for (p = rb_first(&rx->calls); p; p = rb_next(p)) { 580f36b5e44SDavid Howells call = rb_entry(p, struct rxrpc_call, sock_node); 581f36b5e44SDavid Howells rxrpc_mark_call_released(call); 582f36b5e44SDavid Howells } 583f36b5e44SDavid Howells 5848c3e34a4SDavid Howells read_unlock_bh(&rx->call_lock); 5858c3e34a4SDavid Howells _leave(""); 5868c3e34a4SDavid Howells } 5878c3e34a4SDavid Howells 5888c3e34a4SDavid Howells /* 5898c3e34a4SDavid Howells * release a call 5908c3e34a4SDavid Howells */ 5918c3e34a4SDavid Howells void __rxrpc_put_call(struct rxrpc_call *call) 5928c3e34a4SDavid Howells { 5938c3e34a4SDavid Howells ASSERT(call != NULL); 5948c3e34a4SDavid Howells 5958c3e34a4SDavid Howells _enter("%p{u=%d}", call, atomic_read(&call->usage)); 5968c3e34a4SDavid Howells 5978c3e34a4SDavid Howells ASSERTCMP(atomic_read(&call->usage), >, 0); 5988c3e34a4SDavid Howells 5998c3e34a4SDavid Howells if (atomic_dec_and_test(&call->usage)) { 6008c3e34a4SDavid Howells _debug("call %d dead", call->debug_id); 601372ee163SDavid Howells WARN_ON(atomic_read(&call->skb_count) != 0); 6028c3e34a4SDavid Howells ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD); 6038c3e34a4SDavid Howells rxrpc_queue_work(&call->destroyer); 6048c3e34a4SDavid Howells } 6058c3e34a4SDavid Howells _leave(""); 6068c3e34a4SDavid Howells } 6078c3e34a4SDavid Howells 6088c3e34a4SDavid Howells /* 609dee46364SDavid Howells * Final call destruction under RCU. 610dee46364SDavid Howells */ 611dee46364SDavid Howells static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) 612dee46364SDavid Howells { 613dee46364SDavid Howells struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); 614dee46364SDavid Howells 615dee46364SDavid Howells rxrpc_purge_queue(&call->rx_queue); 616df5d8bf7SDavid Howells rxrpc_put_peer(call->peer); 617dee46364SDavid Howells kmem_cache_free(rxrpc_call_jar, call); 618dee46364SDavid Howells } 619dee46364SDavid Howells 620dee46364SDavid Howells /* 6218c3e34a4SDavid Howells * clean up a call 6228c3e34a4SDavid Howells */ 6238c3e34a4SDavid Howells static void rxrpc_cleanup_call(struct rxrpc_call *call) 6248c3e34a4SDavid Howells { 6258c3e34a4SDavid Howells _net("DESTROY CALL %d", call->debug_id); 6268c3e34a4SDavid Howells 6278c3e34a4SDavid Howells ASSERT(call->socket); 6288c3e34a4SDavid Howells 6298c3e34a4SDavid Howells memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); 6308c3e34a4SDavid Howells 6318c3e34a4SDavid Howells del_timer_sync(&call->lifetimer); 6328c3e34a4SDavid Howells del_timer_sync(&call->deadspan); 6338c3e34a4SDavid Howells del_timer_sync(&call->ack_timer); 6348c3e34a4SDavid Howells del_timer_sync(&call->resend_timer); 6358c3e34a4SDavid Howells 6368c3e34a4SDavid Howells ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); 6378c3e34a4SDavid Howells ASSERTCMP(call->events, ==, 0); 6388c3e34a4SDavid Howells if (work_pending(&call->processor)) { 6398c3e34a4SDavid Howells _debug("defer destroy"); 6408c3e34a4SDavid Howells rxrpc_queue_work(&call->destroyer); 6418c3e34a4SDavid Howells return; 6428c3e34a4SDavid Howells } 6438c3e34a4SDavid Howells 644e653cfe4SDavid Howells ASSERTCMP(call->conn, ==, NULL); 6458c3e34a4SDavid Howells 6468c3e34a4SDavid Howells if (call->acks_window) { 6478c3e34a4SDavid Howells _debug("kill Tx window %d", 6488c3e34a4SDavid Howells CIRC_CNT(call->acks_head, call->acks_tail, 6498c3e34a4SDavid Howells call->acks_winsz)); 6508c3e34a4SDavid Howells smp_mb(); 6518c3e34a4SDavid Howells while (CIRC_CNT(call->acks_head, call->acks_tail, 6528c3e34a4SDavid Howells call->acks_winsz) > 0) { 6538c3e34a4SDavid Howells struct rxrpc_skb_priv *sp; 6548c3e34a4SDavid Howells unsigned long _skb; 6558c3e34a4SDavid Howells 6568c3e34a4SDavid Howells _skb = call->acks_window[call->acks_tail] & ~1; 6578c3e34a4SDavid Howells sp = rxrpc_skb((struct sk_buff *)_skb); 6588c3e34a4SDavid Howells _debug("+++ clear Tx %u", sp->hdr.seq); 6598c3e34a4SDavid Howells rxrpc_free_skb((struct sk_buff *)_skb); 6608c3e34a4SDavid Howells call->acks_tail = 6618c3e34a4SDavid Howells (call->acks_tail + 1) & (call->acks_winsz - 1); 6628c3e34a4SDavid Howells } 6638c3e34a4SDavid Howells 6648c3e34a4SDavid Howells kfree(call->acks_window); 6658c3e34a4SDavid Howells } 6668c3e34a4SDavid Howells 6678c3e34a4SDavid Howells rxrpc_free_skb(call->tx_pending); 6688c3e34a4SDavid Howells 6698c3e34a4SDavid Howells rxrpc_purge_queue(&call->rx_queue); 6708c3e34a4SDavid Howells ASSERT(skb_queue_empty(&call->rx_oos_queue)); 6718c3e34a4SDavid Howells sock_put(&call->socket->sk); 672dee46364SDavid Howells call_rcu(&call->rcu, rxrpc_rcu_destroy_call); 6738c3e34a4SDavid Howells } 6748c3e34a4SDavid Howells 6758c3e34a4SDavid Howells /* 6768c3e34a4SDavid Howells * destroy a call 6778c3e34a4SDavid Howells */ 6788c3e34a4SDavid Howells static void rxrpc_destroy_call(struct work_struct *work) 6798c3e34a4SDavid Howells { 6808c3e34a4SDavid Howells struct rxrpc_call *call = 6818c3e34a4SDavid Howells container_of(work, struct rxrpc_call, destroyer); 6828c3e34a4SDavid Howells 68301a90a45SDavid Howells _enter("%p{%d,%x,%p}", 68401a90a45SDavid Howells call, atomic_read(&call->usage), call->cid, call->conn); 6858c3e34a4SDavid Howells 6868c3e34a4SDavid Howells ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD); 6878c3e34a4SDavid Howells 6888c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 6898c3e34a4SDavid Howells list_del_init(&call->link); 6908c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 6918c3e34a4SDavid Howells 6928c3e34a4SDavid Howells rxrpc_cleanup_call(call); 6938c3e34a4SDavid Howells _leave(""); 6948c3e34a4SDavid Howells } 6958c3e34a4SDavid Howells 6968c3e34a4SDavid Howells /* 6978c3e34a4SDavid Howells * preemptively destroy all the call records from a transport endpoint rather 6988c3e34a4SDavid Howells * than waiting for them to time out 6998c3e34a4SDavid Howells */ 7008c3e34a4SDavid Howells void __exit rxrpc_destroy_all_calls(void) 7018c3e34a4SDavid Howells { 7028c3e34a4SDavid Howells struct rxrpc_call *call; 7038c3e34a4SDavid Howells 7048c3e34a4SDavid Howells _enter(""); 7058c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 7068c3e34a4SDavid Howells 7078c3e34a4SDavid Howells while (!list_empty(&rxrpc_calls)) { 7088c3e34a4SDavid Howells call = list_entry(rxrpc_calls.next, struct rxrpc_call, link); 7098c3e34a4SDavid Howells _debug("Zapping call %p", call); 7108c3e34a4SDavid Howells 7118c3e34a4SDavid Howells list_del_init(&call->link); 7128c3e34a4SDavid Howells 7138c3e34a4SDavid Howells switch (atomic_read(&call->usage)) { 7148c3e34a4SDavid Howells case 0: 7158c3e34a4SDavid Howells ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD); 7168c3e34a4SDavid Howells break; 7178c3e34a4SDavid Howells case 1: 7188c3e34a4SDavid Howells if (del_timer_sync(&call->deadspan) != 0 && 7198c3e34a4SDavid Howells call->state != RXRPC_CALL_DEAD) 7208c3e34a4SDavid Howells rxrpc_dead_call_expired((unsigned long) call); 7218c3e34a4SDavid Howells if (call->state != RXRPC_CALL_DEAD) 7228c3e34a4SDavid Howells break; 7238c3e34a4SDavid Howells default: 7248c3e34a4SDavid Howells pr_err("Call %p still in use (%d,%d,%s,%lx,%lx)!\n", 7258c3e34a4SDavid Howells call, atomic_read(&call->usage), 7268c3e34a4SDavid Howells atomic_read(&call->ackr_not_idle), 7278c3e34a4SDavid Howells rxrpc_call_states[call->state], 7288c3e34a4SDavid Howells call->flags, call->events); 7298c3e34a4SDavid Howells if (!skb_queue_empty(&call->rx_queue)) 7308c3e34a4SDavid Howells pr_err("Rx queue occupied\n"); 7318c3e34a4SDavid Howells if (!skb_queue_empty(&call->rx_oos_queue)) 7328c3e34a4SDavid Howells pr_err("OOS queue occupied\n"); 7338c3e34a4SDavid Howells break; 7348c3e34a4SDavid Howells } 7358c3e34a4SDavid Howells 7368c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 7378c3e34a4SDavid Howells cond_resched(); 7388c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 7398c3e34a4SDavid Howells } 7408c3e34a4SDavid Howells 7418c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 7428c3e34a4SDavid Howells _leave(""); 7438c3e34a4SDavid Howells } 7448c3e34a4SDavid Howells 7458c3e34a4SDavid Howells /* 7468c3e34a4SDavid Howells * handle call lifetime being exceeded 7478c3e34a4SDavid Howells */ 7488c3e34a4SDavid Howells static void rxrpc_call_life_expired(unsigned long _call) 7498c3e34a4SDavid Howells { 7508c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7518c3e34a4SDavid Howells 7528c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7538c3e34a4SDavid Howells return; 7548c3e34a4SDavid Howells 7558c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7568c3e34a4SDavid Howells read_lock_bh(&call->state_lock); 7578c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 7588c3e34a4SDavid Howells set_bit(RXRPC_CALL_EV_LIFE_TIMER, &call->events); 7598c3e34a4SDavid Howells rxrpc_queue_call(call); 7608c3e34a4SDavid Howells } 7618c3e34a4SDavid Howells read_unlock_bh(&call->state_lock); 7628c3e34a4SDavid Howells } 7638c3e34a4SDavid Howells 7648c3e34a4SDavid Howells /* 7658c3e34a4SDavid Howells * handle resend timer expiry 7668c3e34a4SDavid Howells * - may not take call->state_lock as this can deadlock against del_timer_sync() 7678c3e34a4SDavid Howells */ 7688c3e34a4SDavid Howells static void rxrpc_resend_time_expired(unsigned long _call) 7698c3e34a4SDavid Howells { 7708c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7718c3e34a4SDavid Howells 7728c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7738c3e34a4SDavid Howells 7748c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7758c3e34a4SDavid Howells return; 7768c3e34a4SDavid Howells 7778c3e34a4SDavid Howells clear_bit(RXRPC_CALL_RUN_RTIMER, &call->flags); 7788c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_RESEND_TIMER, &call->events)) 7798c3e34a4SDavid Howells rxrpc_queue_call(call); 7808c3e34a4SDavid Howells } 7818c3e34a4SDavid Howells 7828c3e34a4SDavid Howells /* 7838c3e34a4SDavid Howells * handle ACK timer expiry 7848c3e34a4SDavid Howells */ 7858c3e34a4SDavid Howells static void rxrpc_ack_time_expired(unsigned long _call) 7868c3e34a4SDavid Howells { 7878c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7888c3e34a4SDavid Howells 7898c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7908c3e34a4SDavid Howells 7918c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7928c3e34a4SDavid Howells return; 7938c3e34a4SDavid Howells 7948c3e34a4SDavid Howells read_lock_bh(&call->state_lock); 7958c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE && 7968c3e34a4SDavid Howells !test_and_set_bit(RXRPC_CALL_EV_ACK, &call->events)) 7978c3e34a4SDavid Howells rxrpc_queue_call(call); 7988c3e34a4SDavid Howells read_unlock_bh(&call->state_lock); 7998c3e34a4SDavid Howells } 800