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); 1308c3e34a4SDavid Howells INIT_LIST_HEAD(&call->accept_link); 1318c3e34a4SDavid Howells skb_queue_head_init(&call->rx_queue); 1328c3e34a4SDavid Howells skb_queue_head_init(&call->rx_oos_queue); 1338c3e34a4SDavid Howells init_waitqueue_head(&call->tx_waitq); 1348c3e34a4SDavid Howells spin_lock_init(&call->lock); 1358c3e34a4SDavid Howells rwlock_init(&call->state_lock); 1368c3e34a4SDavid Howells atomic_set(&call->usage, 1); 1378c3e34a4SDavid Howells call->debug_id = atomic_inc_return(&rxrpc_debug_id); 1388c3e34a4SDavid Howells 1398c3e34a4SDavid Howells memset(&call->sock_node, 0xed, sizeof(call->sock_node)); 1408c3e34a4SDavid Howells 1418c3e34a4SDavid Howells call->rx_data_expect = 1; 1428c3e34a4SDavid Howells call->rx_data_eaten = 0; 1438c3e34a4SDavid Howells call->rx_first_oos = 0; 1448c3e34a4SDavid Howells call->ackr_win_top = call->rx_data_eaten + 1 + rxrpc_rx_window_size; 1458c3e34a4SDavid Howells call->creation_jif = jiffies; 1468c3e34a4SDavid Howells return call; 1478c3e34a4SDavid Howells } 1488c3e34a4SDavid Howells 1498c3e34a4SDavid Howells /* 150999b69f8SDavid Howells * Allocate a new client call. 1518c3e34a4SDavid Howells */ 152aa390bbeSDavid Howells static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx, 153999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 1548c3e34a4SDavid Howells gfp_t gfp) 1558c3e34a4SDavid Howells { 1568c3e34a4SDavid Howells struct rxrpc_call *call; 1578c3e34a4SDavid Howells 1588c3e34a4SDavid Howells _enter(""); 1598c3e34a4SDavid Howells 160999b69f8SDavid Howells ASSERT(rx->local != NULL); 1618c3e34a4SDavid Howells 1628c3e34a4SDavid Howells call = rxrpc_alloc_call(gfp); 1638c3e34a4SDavid Howells if (!call) 1648c3e34a4SDavid Howells return ERR_PTR(-ENOMEM); 165999b69f8SDavid Howells call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; 1668c3e34a4SDavid Howells 1678c3e34a4SDavid Howells sock_hold(&rx->sk); 1688c3e34a4SDavid Howells call->socket = rx; 1698c3e34a4SDavid Howells call->rx_data_post = 1; 170999b69f8SDavid Howells call->service_id = srx->srx_service; 171999b69f8SDavid Howells 172999b69f8SDavid Howells _leave(" = %p", call); 173999b69f8SDavid Howells return call; 174999b69f8SDavid Howells } 175999b69f8SDavid Howells 176999b69f8SDavid Howells /* 177999b69f8SDavid Howells * Begin client call. 178999b69f8SDavid Howells */ 179999b69f8SDavid Howells static int rxrpc_begin_client_call(struct rxrpc_call *call, 180999b69f8SDavid Howells struct rxrpc_conn_parameters *cp, 181999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 182999b69f8SDavid Howells gfp_t gfp) 183999b69f8SDavid Howells { 184999b69f8SDavid Howells int ret; 185999b69f8SDavid Howells 186999b69f8SDavid Howells /* Set up or get a connection record and set the protocol parameters, 187999b69f8SDavid Howells * including channel number and call ID. 188999b69f8SDavid Howells */ 189aa390bbeSDavid Howells ret = rxrpc_connect_call(call, cp, srx, gfp); 190999b69f8SDavid Howells if (ret < 0) 191999b69f8SDavid Howells return ret; 192999b69f8SDavid Howells 193999b69f8SDavid Howells call->state = RXRPC_CALL_CLIENT_SEND_REQUEST; 194999b69f8SDavid Howells 19585f32278SDavid Howells spin_lock(&call->conn->params.peer->lock); 19685f32278SDavid Howells hlist_add_head(&call->error_link, &call->conn->params.peer->error_targets); 19785f32278SDavid Howells spin_unlock(&call->conn->params.peer->lock); 1988c3e34a4SDavid Howells 1998c3e34a4SDavid Howells call->lifetimer.expires = jiffies + rxrpc_max_call_lifetime; 2008c3e34a4SDavid Howells add_timer(&call->lifetimer); 201999b69f8SDavid Howells return 0; 2028c3e34a4SDavid Howells } 2038c3e34a4SDavid Howells 2048c3e34a4SDavid Howells /* 2058c3e34a4SDavid Howells * set up a call for the given data 2068c3e34a4SDavid Howells * - called in process context with IRQs enabled 2078c3e34a4SDavid Howells */ 2088c3e34a4SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, 20919ffa01cSDavid Howells struct rxrpc_conn_parameters *cp, 210999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 2118c3e34a4SDavid Howells unsigned long user_call_ID, 2128c3e34a4SDavid Howells gfp_t gfp) 2138c3e34a4SDavid Howells { 2148c3e34a4SDavid Howells struct rxrpc_call *call, *xcall; 2158c3e34a4SDavid Howells struct rb_node *parent, **pp; 216999b69f8SDavid Howells int ret; 2178c3e34a4SDavid Howells 218999b69f8SDavid Howells _enter("%p,%lx", rx, user_call_ID); 2198c3e34a4SDavid Howells 220aa390bbeSDavid Howells call = rxrpc_alloc_client_call(rx, srx, gfp); 2218c3e34a4SDavid Howells if (IS_ERR(call)) { 2228c3e34a4SDavid Howells _leave(" = %ld", PTR_ERR(call)); 2238c3e34a4SDavid Howells return call; 2248c3e34a4SDavid Howells } 2258c3e34a4SDavid Howells 226999b69f8SDavid Howells /* Publish the call, even though it is incompletely set up as yet */ 2278c3e34a4SDavid Howells call->user_call_ID = user_call_ID; 2288c3e34a4SDavid Howells __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); 2298c3e34a4SDavid Howells 2308c3e34a4SDavid Howells write_lock(&rx->call_lock); 2318c3e34a4SDavid Howells 2328c3e34a4SDavid Howells pp = &rx->calls.rb_node; 2338c3e34a4SDavid Howells parent = NULL; 2348c3e34a4SDavid Howells while (*pp) { 2358c3e34a4SDavid Howells parent = *pp; 2368c3e34a4SDavid Howells xcall = rb_entry(parent, struct rxrpc_call, sock_node); 2378c3e34a4SDavid Howells 2388c3e34a4SDavid Howells if (user_call_ID < xcall->user_call_ID) 2398c3e34a4SDavid Howells pp = &(*pp)->rb_left; 2408c3e34a4SDavid Howells else if (user_call_ID > xcall->user_call_ID) 2418c3e34a4SDavid Howells pp = &(*pp)->rb_right; 2428c3e34a4SDavid Howells else 2438c3e34a4SDavid Howells goto found_user_ID_now_present; 2448c3e34a4SDavid Howells } 2458c3e34a4SDavid Howells 2468c3e34a4SDavid Howells rxrpc_get_call(call); 2478c3e34a4SDavid Howells 2488c3e34a4SDavid Howells rb_link_node(&call->sock_node, parent, pp); 2498c3e34a4SDavid Howells rb_insert_color(&call->sock_node, &rx->calls); 2508c3e34a4SDavid Howells write_unlock(&rx->call_lock); 2518c3e34a4SDavid Howells 2528c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 2538c3e34a4SDavid Howells list_add_tail(&call->link, &rxrpc_calls); 2548c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 2558c3e34a4SDavid Howells 256aa390bbeSDavid Howells ret = rxrpc_begin_client_call(call, cp, srx, gfp); 257999b69f8SDavid Howells if (ret < 0) 258999b69f8SDavid Howells goto error; 259999b69f8SDavid Howells 2608c3e34a4SDavid Howells _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); 2618c3e34a4SDavid Howells 2628c3e34a4SDavid Howells _leave(" = %p [new]", call); 2638c3e34a4SDavid Howells return call; 2648c3e34a4SDavid Howells 265999b69f8SDavid Howells error: 266999b69f8SDavid Howells write_lock(&rx->call_lock); 267999b69f8SDavid Howells rb_erase(&call->sock_node, &rx->calls); 268999b69f8SDavid Howells write_unlock(&rx->call_lock); 269999b69f8SDavid Howells rxrpc_put_call(call); 270999b69f8SDavid Howells 271999b69f8SDavid Howells write_lock_bh(&rxrpc_call_lock); 272d1e858c5SDavid Howells list_del_init(&call->link); 273999b69f8SDavid Howells write_unlock_bh(&rxrpc_call_lock); 274999b69f8SDavid Howells 27517b963e3SDavid Howells set_bit(RXRPC_CALL_RELEASED, &call->flags); 276d1e858c5SDavid Howells call->state = RXRPC_CALL_DEAD; 277999b69f8SDavid Howells rxrpc_put_call(call); 278999b69f8SDavid Howells _leave(" = %d", ret); 279999b69f8SDavid Howells return ERR_PTR(ret); 280999b69f8SDavid Howells 2818c3e34a4SDavid Howells /* We unexpectedly found the user ID in the list after taking 2828c3e34a4SDavid Howells * the call_lock. This shouldn't happen unless the user races 2838c3e34a4SDavid Howells * with itself and tries to add the same user ID twice at the 2848c3e34a4SDavid Howells * same time in different threads. 2858c3e34a4SDavid Howells */ 2868c3e34a4SDavid Howells found_user_ID_now_present: 2878c3e34a4SDavid Howells write_unlock(&rx->call_lock); 28817b963e3SDavid Howells set_bit(RXRPC_CALL_RELEASED, &call->flags); 289d1e858c5SDavid Howells call->state = RXRPC_CALL_DEAD; 2908c3e34a4SDavid Howells rxrpc_put_call(call); 2918c3e34a4SDavid Howells _leave(" = -EEXIST [%p]", call); 2928c3e34a4SDavid Howells return ERR_PTR(-EEXIST); 2938c3e34a4SDavid Howells } 2948c3e34a4SDavid Howells 2958c3e34a4SDavid Howells /* 2968c3e34a4SDavid Howells * set up an incoming call 2978c3e34a4SDavid Howells * - called in process context with IRQs enabled 2988c3e34a4SDavid Howells */ 2998c3e34a4SDavid Howells struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *rx, 3008c3e34a4SDavid Howells struct rxrpc_connection *conn, 30142886ffeSDavid Howells struct sk_buff *skb) 3028c3e34a4SDavid Howells { 30342886ffeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 3048c3e34a4SDavid Howells struct rxrpc_call *call, *candidate; 305a1399f8bSDavid Howells u32 call_id, chan; 3068c3e34a4SDavid Howells 3078c3e34a4SDavid Howells _enter(",%d", conn->debug_id); 3088c3e34a4SDavid Howells 3098c3e34a4SDavid Howells ASSERT(rx != NULL); 3108c3e34a4SDavid Howells 3118c3e34a4SDavid Howells candidate = rxrpc_alloc_call(GFP_NOIO); 3128c3e34a4SDavid Howells if (!candidate) 3138c3e34a4SDavid Howells return ERR_PTR(-EBUSY); 3148c3e34a4SDavid Howells 315a1399f8bSDavid Howells chan = sp->hdr.cid & RXRPC_CHANNELMASK; 3168c3e34a4SDavid Howells candidate->socket = rx; 3178c3e34a4SDavid Howells candidate->conn = conn; 31842886ffeSDavid Howells candidate->cid = sp->hdr.cid; 31942886ffeSDavid Howells candidate->call_id = sp->hdr.callNumber; 320a1399f8bSDavid Howells candidate->channel = chan; 3218c3e34a4SDavid Howells candidate->rx_data_post = 0; 3228c3e34a4SDavid Howells candidate->state = RXRPC_CALL_SERVER_ACCEPTING; 323dabe5a79SDavid Howells candidate->flags |= (1 << RXRPC_CALL_IS_SERVICE); 3248c3e34a4SDavid Howells if (conn->security_ix > 0) 3258c3e34a4SDavid Howells candidate->state = RXRPC_CALL_SERVER_SECURING; 3268c3e34a4SDavid Howells 327a1399f8bSDavid Howells spin_lock(&conn->channel_lock); 3288c3e34a4SDavid Howells 3298c3e34a4SDavid Howells /* set the channel for this call */ 330a1399f8bSDavid Howells call = rcu_dereference_protected(conn->channels[chan].call, 331a1399f8bSDavid Howells lockdep_is_held(&conn->channel_lock)); 332a1399f8bSDavid Howells 3338c3e34a4SDavid Howells _debug("channel[%u] is %p", candidate->channel, call); 33442886ffeSDavid Howells if (call && call->call_id == sp->hdr.callNumber) { 3358c3e34a4SDavid Howells /* already set; must've been a duplicate packet */ 3368c3e34a4SDavid Howells _debug("extant call [%d]", call->state); 3378c3e34a4SDavid Howells ASSERTCMP(call->conn, ==, conn); 3388c3e34a4SDavid Howells 3398c3e34a4SDavid Howells read_lock(&call->state_lock); 3408c3e34a4SDavid Howells switch (call->state) { 3418c3e34a4SDavid Howells case RXRPC_CALL_LOCALLY_ABORTED: 3428c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events)) 3438c3e34a4SDavid Howells rxrpc_queue_call(call); 3448c3e34a4SDavid Howells case RXRPC_CALL_REMOTELY_ABORTED: 3458c3e34a4SDavid Howells read_unlock(&call->state_lock); 3468c3e34a4SDavid Howells goto aborted_call; 3478c3e34a4SDavid Howells default: 3488c3e34a4SDavid Howells rxrpc_get_call(call); 3498c3e34a4SDavid Howells read_unlock(&call->state_lock); 3508c3e34a4SDavid Howells goto extant_call; 3518c3e34a4SDavid Howells } 3528c3e34a4SDavid Howells } 3538c3e34a4SDavid Howells 3548c3e34a4SDavid Howells if (call) { 3558c3e34a4SDavid Howells /* it seems the channel is still in use from the previous call 3568c3e34a4SDavid Howells * - ditch the old binding if its call is now complete */ 3578c3e34a4SDavid Howells _debug("CALL: %u { %s }", 3588c3e34a4SDavid Howells call->debug_id, rxrpc_call_states[call->state]); 3598c3e34a4SDavid Howells 3608c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) { 361a1399f8bSDavid Howells __rxrpc_disconnect_call(call); 3628c3e34a4SDavid Howells } else { 363a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3648c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 3658c3e34a4SDavid Howells _leave(" = -EBUSY"); 3668c3e34a4SDavid Howells return ERR_PTR(-EBUSY); 3678c3e34a4SDavid Howells } 3688c3e34a4SDavid Howells } 3698c3e34a4SDavid Howells 3708c3e34a4SDavid Howells /* check the call number isn't duplicate */ 3718c3e34a4SDavid Howells _debug("check dup"); 37242886ffeSDavid Howells call_id = sp->hdr.callNumber; 3738c3e34a4SDavid Howells 374a1399f8bSDavid Howells /* We just ignore calls prior to the current call ID. Terminated calls 375a1399f8bSDavid Howells * are handled via the connection. 3768c3e34a4SDavid Howells */ 377a1399f8bSDavid Howells if (call_id <= conn->channels[chan].call_counter) 378a1399f8bSDavid Howells goto old_call; /* TODO: Just drop packet */ 3798c3e34a4SDavid Howells 3808c3e34a4SDavid Howells /* make the call available */ 3818c3e34a4SDavid Howells _debug("new call"); 3828c3e34a4SDavid Howells call = candidate; 3838c3e34a4SDavid Howells candidate = NULL; 384a1399f8bSDavid Howells conn->channels[chan].call_counter = call_id; 385a1399f8bSDavid Howells rcu_assign_pointer(conn->channels[chan].call, call); 3868c3e34a4SDavid Howells sock_hold(&rx->sk); 3875627cc8bSDavid Howells rxrpc_get_connection(conn); 388a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 3898c3e34a4SDavid Howells 39085f32278SDavid Howells spin_lock(&conn->params.peer->lock); 39185f32278SDavid Howells hlist_add_head(&call->error_link, &conn->params.peer->error_targets); 39285f32278SDavid Howells spin_unlock(&conn->params.peer->lock); 3938c3e34a4SDavid Howells 3948c3e34a4SDavid Howells write_lock_bh(&rxrpc_call_lock); 3958c3e34a4SDavid Howells list_add_tail(&call->link, &rxrpc_calls); 3968c3e34a4SDavid Howells write_unlock_bh(&rxrpc_call_lock); 3978c3e34a4SDavid Howells 39819ffa01cSDavid Howells call->service_id = conn->params.service_id; 3998c3e34a4SDavid Howells 4008c3e34a4SDavid Howells _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); 4018c3e34a4SDavid Howells 4028c3e34a4SDavid Howells call->lifetimer.expires = jiffies + rxrpc_max_call_lifetime; 4038c3e34a4SDavid Howells add_timer(&call->lifetimer); 4048c3e34a4SDavid Howells _leave(" = %p {%d} [new]", call, call->debug_id); 4058c3e34a4SDavid Howells return call; 4068c3e34a4SDavid Howells 4078c3e34a4SDavid Howells extant_call: 408a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4098c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4108c3e34a4SDavid Howells _leave(" = %p {%d} [extant]", call, call ? call->debug_id : -1); 4118c3e34a4SDavid Howells return call; 4128c3e34a4SDavid Howells 4138c3e34a4SDavid Howells aborted_call: 414a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4158c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4168c3e34a4SDavid Howells _leave(" = -ECONNABORTED"); 4178c3e34a4SDavid Howells return ERR_PTR(-ECONNABORTED); 4188c3e34a4SDavid Howells 4198c3e34a4SDavid Howells old_call: 420a1399f8bSDavid Howells spin_unlock(&conn->channel_lock); 4218c3e34a4SDavid Howells kmem_cache_free(rxrpc_call_jar, candidate); 4228c3e34a4SDavid Howells _leave(" = -ECONNRESET [old]"); 4238c3e34a4SDavid Howells return ERR_PTR(-ECONNRESET); 4248c3e34a4SDavid Howells } 4258c3e34a4SDavid Howells 4268c3e34a4SDavid Howells /* 4278c3e34a4SDavid Howells * detach a call from a socket and set up for release 4288c3e34a4SDavid Howells */ 4298c3e34a4SDavid Howells void rxrpc_release_call(struct rxrpc_call *call) 4308c3e34a4SDavid Howells { 4318c3e34a4SDavid Howells struct rxrpc_connection *conn = call->conn; 4328c3e34a4SDavid Howells struct rxrpc_sock *rx = call->socket; 4338c3e34a4SDavid Howells 4348c3e34a4SDavid Howells _enter("{%d,%d,%d,%d}", 4358c3e34a4SDavid Howells call->debug_id, atomic_read(&call->usage), 4368c3e34a4SDavid Howells atomic_read(&call->ackr_not_idle), 4378c3e34a4SDavid Howells call->rx_first_oos); 4388c3e34a4SDavid Howells 4398c3e34a4SDavid Howells spin_lock_bh(&call->lock); 4408c3e34a4SDavid Howells if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) 4418c3e34a4SDavid Howells BUG(); 4428c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 4438c3e34a4SDavid Howells 4448c3e34a4SDavid Howells /* dissociate from the socket 4458c3e34a4SDavid Howells * - the socket's ref on the call is passed to the death timer 4468c3e34a4SDavid Howells */ 4478c3e34a4SDavid Howells _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); 4488c3e34a4SDavid Howells 449e653cfe4SDavid Howells spin_lock(&conn->params.peer->lock); 450e653cfe4SDavid Howells hlist_del_init(&call->error_link); 451e653cfe4SDavid Howells spin_unlock(&conn->params.peer->lock); 452e653cfe4SDavid Howells 4538c3e34a4SDavid Howells write_lock_bh(&rx->call_lock); 4548c3e34a4SDavid Howells if (!list_empty(&call->accept_link)) { 4558c3e34a4SDavid Howells _debug("unlinking once-pending call %p { e=%lx f=%lx }", 4568c3e34a4SDavid Howells call, call->events, call->flags); 4578c3e34a4SDavid Howells ASSERT(!test_bit(RXRPC_CALL_HAS_USERID, &call->flags)); 4588c3e34a4SDavid Howells list_del_init(&call->accept_link); 4598c3e34a4SDavid Howells sk_acceptq_removed(&rx->sk); 4608c3e34a4SDavid Howells } else if (test_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { 4618c3e34a4SDavid Howells rb_erase(&call->sock_node, &rx->calls); 4628c3e34a4SDavid Howells memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); 4638c3e34a4SDavid Howells clear_bit(RXRPC_CALL_HAS_USERID, &call->flags); 4648c3e34a4SDavid Howells } 4658c3e34a4SDavid Howells write_unlock_bh(&rx->call_lock); 4668c3e34a4SDavid Howells 4678c3e34a4SDavid Howells /* free up the channel for reuse */ 468a1399f8bSDavid Howells write_lock_bh(&call->state_lock); 4698c3e34a4SDavid Howells 4708c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE && 4718c3e34a4SDavid Howells call->state != RXRPC_CALL_CLIENT_FINAL_ACK) { 4728c3e34a4SDavid Howells _debug("+++ ABORTING STATE %d +++\n", call->state); 4738c3e34a4SDavid Howells call->state = RXRPC_CALL_LOCALLY_ABORTED; 4748c3e34a4SDavid Howells call->local_abort = RX_CALL_DEAD; 4758c3e34a4SDavid Howells } 476a1399f8bSDavid Howells write_unlock_bh(&call->state_lock); 4778c3e34a4SDavid Howells 478e653cfe4SDavid Howells rxrpc_disconnect_call(call); 479e653cfe4SDavid Howells 4808c3e34a4SDavid Howells /* clean up the Rx queue */ 4818c3e34a4SDavid Howells if (!skb_queue_empty(&call->rx_queue) || 4828c3e34a4SDavid Howells !skb_queue_empty(&call->rx_oos_queue)) { 4838c3e34a4SDavid Howells struct rxrpc_skb_priv *sp; 4848c3e34a4SDavid Howells struct sk_buff *skb; 4858c3e34a4SDavid Howells 4868c3e34a4SDavid Howells _debug("purge Rx queues"); 4878c3e34a4SDavid Howells 4888c3e34a4SDavid Howells spin_lock_bh(&call->lock); 4898c3e34a4SDavid Howells while ((skb = skb_dequeue(&call->rx_queue)) || 4908c3e34a4SDavid Howells (skb = skb_dequeue(&call->rx_oos_queue))) { 4918c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 4928c3e34a4SDavid Howells 49355cae7a4SArnd Bergmann sp = rxrpc_skb(skb); 4948c3e34a4SDavid Howells _debug("- zap %s %%%u #%u", 4958c3e34a4SDavid Howells rxrpc_pkts[sp->hdr.type], 4968c3e34a4SDavid Howells sp->hdr.serial, sp->hdr.seq); 4978c3e34a4SDavid Howells rxrpc_free_skb(skb); 4988c3e34a4SDavid Howells spin_lock_bh(&call->lock); 4998c3e34a4SDavid Howells } 5008c3e34a4SDavid Howells spin_unlock_bh(&call->lock); 5018c3e34a4SDavid Howells 5028c3e34a4SDavid Howells ASSERTCMP(call->state, !=, RXRPC_CALL_COMPLETE); 5038c3e34a4SDavid Howells } 5048c3e34a4SDavid Howells 5058c3e34a4SDavid Howells del_timer_sync(&call->resend_timer); 5068c3e34a4SDavid Howells del_timer_sync(&call->ack_timer); 5078c3e34a4SDavid Howells del_timer_sync(&call->lifetimer); 5088c3e34a4SDavid Howells call->deadspan.expires = jiffies + rxrpc_dead_call_expiry; 5098c3e34a4SDavid Howells add_timer(&call->deadspan); 5108c3e34a4SDavid Howells 5118c3e34a4SDavid Howells _leave(""); 5128c3e34a4SDavid Howells } 5138c3e34a4SDavid Howells 5148c3e34a4SDavid Howells /* 5158c3e34a4SDavid Howells * handle a dead call being ready for reaping 5168c3e34a4SDavid Howells */ 5178c3e34a4SDavid Howells static void rxrpc_dead_call_expired(unsigned long _call) 5188c3e34a4SDavid Howells { 5198c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 5208c3e34a4SDavid Howells 5218c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 5228c3e34a4SDavid Howells 5238c3e34a4SDavid Howells write_lock_bh(&call->state_lock); 5248c3e34a4SDavid Howells call->state = RXRPC_CALL_DEAD; 5258c3e34a4SDavid Howells write_unlock_bh(&call->state_lock); 5268c3e34a4SDavid Howells rxrpc_put_call(call); 5278c3e34a4SDavid Howells } 5288c3e34a4SDavid Howells 5298c3e34a4SDavid Howells /* 5308c3e34a4SDavid Howells * mark a call as to be released, aborting it if it's still in progress 5318c3e34a4SDavid Howells * - called with softirqs disabled 5328c3e34a4SDavid Howells */ 5338c3e34a4SDavid Howells static void rxrpc_mark_call_released(struct rxrpc_call *call) 5348c3e34a4SDavid Howells { 5358c3e34a4SDavid Howells bool sched; 5368c3e34a4SDavid Howells 5378c3e34a4SDavid Howells write_lock(&call->state_lock); 5388c3e34a4SDavid Howells if (call->state < RXRPC_CALL_DEAD) { 5398c3e34a4SDavid Howells sched = false; 5408c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 5418c3e34a4SDavid Howells _debug("abort call %p", call); 5428c3e34a4SDavid Howells call->state = RXRPC_CALL_LOCALLY_ABORTED; 5438c3e34a4SDavid Howells call->local_abort = RX_CALL_DEAD; 5448c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events)) 5458c3e34a4SDavid Howells sched = true; 5468c3e34a4SDavid Howells } 5478c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_RELEASE, &call->events)) 5488c3e34a4SDavid Howells sched = true; 5498c3e34a4SDavid Howells if (sched) 5508c3e34a4SDavid Howells rxrpc_queue_call(call); 5518c3e34a4SDavid Howells } 5528c3e34a4SDavid Howells write_unlock(&call->state_lock); 5538c3e34a4SDavid Howells } 5548c3e34a4SDavid Howells 5558c3e34a4SDavid Howells /* 5568c3e34a4SDavid Howells * release all the calls associated with a socket 5578c3e34a4SDavid Howells */ 5588c3e34a4SDavid Howells void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) 5598c3e34a4SDavid Howells { 5608c3e34a4SDavid Howells struct rxrpc_call *call; 5618c3e34a4SDavid Howells struct rb_node *p; 5628c3e34a4SDavid Howells 5638c3e34a4SDavid Howells _enter("%p", rx); 5648c3e34a4SDavid Howells 5658c3e34a4SDavid Howells read_lock_bh(&rx->call_lock); 5668c3e34a4SDavid Howells 5678c3e34a4SDavid Howells /* kill the not-yet-accepted incoming calls */ 5688c3e34a4SDavid Howells list_for_each_entry(call, &rx->secureq, accept_link) { 5698c3e34a4SDavid Howells rxrpc_mark_call_released(call); 5708c3e34a4SDavid Howells } 5718c3e34a4SDavid Howells 5728c3e34a4SDavid Howells list_for_each_entry(call, &rx->acceptq, accept_link) { 5738c3e34a4SDavid Howells rxrpc_mark_call_released(call); 5748c3e34a4SDavid Howells } 5758c3e34a4SDavid Howells 576f36b5e44SDavid Howells /* mark all the calls as no longer wanting incoming packets */ 577f36b5e44SDavid Howells for (p = rb_first(&rx->calls); p; p = rb_next(p)) { 578f36b5e44SDavid Howells call = rb_entry(p, struct rxrpc_call, sock_node); 579f36b5e44SDavid Howells rxrpc_mark_call_released(call); 580f36b5e44SDavid Howells } 581f36b5e44SDavid Howells 5828c3e34a4SDavid Howells read_unlock_bh(&rx->call_lock); 5838c3e34a4SDavid Howells _leave(""); 5848c3e34a4SDavid Howells } 5858c3e34a4SDavid Howells 5868c3e34a4SDavid Howells /* 5878c3e34a4SDavid Howells * release a call 5888c3e34a4SDavid Howells */ 5898c3e34a4SDavid Howells void __rxrpc_put_call(struct rxrpc_call *call) 5908c3e34a4SDavid Howells { 5918c3e34a4SDavid Howells ASSERT(call != NULL); 5928c3e34a4SDavid Howells 5938c3e34a4SDavid Howells _enter("%p{u=%d}", call, atomic_read(&call->usage)); 5948c3e34a4SDavid Howells 5958c3e34a4SDavid Howells ASSERTCMP(atomic_read(&call->usage), >, 0); 5968c3e34a4SDavid Howells 5978c3e34a4SDavid Howells if (atomic_dec_and_test(&call->usage)) { 5988c3e34a4SDavid Howells _debug("call %d dead", call->debug_id); 599372ee163SDavid Howells WARN_ON(atomic_read(&call->skb_count) != 0); 6008c3e34a4SDavid Howells ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD); 6018c3e34a4SDavid Howells rxrpc_queue_work(&call->destroyer); 6028c3e34a4SDavid Howells } 6038c3e34a4SDavid Howells _leave(""); 6048c3e34a4SDavid Howells } 6058c3e34a4SDavid Howells 6068c3e34a4SDavid Howells /* 607dee46364SDavid Howells * Final call destruction under RCU. 608dee46364SDavid Howells */ 609dee46364SDavid Howells static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) 610dee46364SDavid Howells { 611dee46364SDavid Howells struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); 612dee46364SDavid Howells 613dee46364SDavid Howells rxrpc_purge_queue(&call->rx_queue); 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 6808c3e34a4SDavid Howells _enter("%p{%d,%d,%p}", 6818c3e34a4SDavid Howells call, atomic_read(&call->usage), call->channel, 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 7498c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7508c3e34a4SDavid Howells return; 7518c3e34a4SDavid Howells 7528c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7538c3e34a4SDavid Howells read_lock_bh(&call->state_lock); 7548c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 7558c3e34a4SDavid Howells set_bit(RXRPC_CALL_EV_LIFE_TIMER, &call->events); 7568c3e34a4SDavid Howells rxrpc_queue_call(call); 7578c3e34a4SDavid Howells } 7588c3e34a4SDavid Howells read_unlock_bh(&call->state_lock); 7598c3e34a4SDavid Howells } 7608c3e34a4SDavid Howells 7618c3e34a4SDavid Howells /* 7628c3e34a4SDavid Howells * handle resend timer expiry 7638c3e34a4SDavid Howells * - may not take call->state_lock as this can deadlock against del_timer_sync() 7648c3e34a4SDavid Howells */ 7658c3e34a4SDavid Howells static void rxrpc_resend_time_expired(unsigned long _call) 7668c3e34a4SDavid Howells { 7678c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7688c3e34a4SDavid Howells 7698c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7708c3e34a4SDavid Howells 7718c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7728c3e34a4SDavid Howells return; 7738c3e34a4SDavid Howells 7748c3e34a4SDavid Howells clear_bit(RXRPC_CALL_RUN_RTIMER, &call->flags); 7758c3e34a4SDavid Howells if (!test_and_set_bit(RXRPC_CALL_EV_RESEND_TIMER, &call->events)) 7768c3e34a4SDavid Howells rxrpc_queue_call(call); 7778c3e34a4SDavid Howells } 7788c3e34a4SDavid Howells 7798c3e34a4SDavid Howells /* 7808c3e34a4SDavid Howells * handle ACK timer expiry 7818c3e34a4SDavid Howells */ 7828c3e34a4SDavid Howells static void rxrpc_ack_time_expired(unsigned long _call) 7838c3e34a4SDavid Howells { 7848c3e34a4SDavid Howells struct rxrpc_call *call = (struct rxrpc_call *) _call; 7858c3e34a4SDavid Howells 7868c3e34a4SDavid Howells _enter("{%d}", call->debug_id); 7878c3e34a4SDavid Howells 7888c3e34a4SDavid Howells if (call->state >= RXRPC_CALL_COMPLETE) 7898c3e34a4SDavid Howells return; 7908c3e34a4SDavid Howells 7918c3e34a4SDavid Howells read_lock_bh(&call->state_lock); 7928c3e34a4SDavid Howells if (call->state < RXRPC_CALL_COMPLETE && 7938c3e34a4SDavid Howells !test_and_set_bit(RXRPC_CALL_EV_ACK, &call->events)) 7948c3e34a4SDavid Howells rxrpc_queue_call(call); 7958c3e34a4SDavid Howells read_unlock_bh(&call->state_lock); 7968c3e34a4SDavid Howells } 797