12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 28c3e34a4SDavid Howells /* RxRPC individual remote procedure call handling 38c3e34a4SDavid Howells * 48c3e34a4SDavid Howells * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 58c3e34a4SDavid Howells * Written by David Howells (dhowells@redhat.com) 68c3e34a4SDavid Howells */ 78c3e34a4SDavid Howells 88c3e34a4SDavid Howells #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 98c3e34a4SDavid Howells 108c3e34a4SDavid Howells #include <linux/slab.h> 118c3e34a4SDavid Howells #include <linux/module.h> 128c3e34a4SDavid Howells #include <linux/circ_buf.h> 138c3e34a4SDavid Howells #include <linux/spinlock_types.h> 148c3e34a4SDavid Howells #include <net/sock.h> 158c3e34a4SDavid Howells #include <net/af_rxrpc.h> 168c3e34a4SDavid Howells #include "ar-internal.h" 178c3e34a4SDavid Howells 188c3e34a4SDavid Howells const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = { 19999b69f8SDavid Howells [RXRPC_CALL_UNINITIALISED] = "Uninit ", 20999b69f8SDavid Howells [RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn", 218c3e34a4SDavid Howells [RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq", 228c3e34a4SDavid Howells [RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl", 238c3e34a4SDavid Howells [RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl", 2400e90712SDavid Howells [RXRPC_CALL_SERVER_PREALLOC] = "SvPrealc", 258c3e34a4SDavid Howells [RXRPC_CALL_SERVER_SECURING] = "SvSecure", 268c3e34a4SDavid Howells [RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq", 278c3e34a4SDavid Howells [RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq", 288c3e34a4SDavid Howells [RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl", 298c3e34a4SDavid Howells [RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK", 308c3e34a4SDavid Howells [RXRPC_CALL_COMPLETE] = "Complete", 31f5c17aaeSDavid Howells }; 32f5c17aaeSDavid Howells 33f5c17aaeSDavid Howells const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = { 34f5c17aaeSDavid Howells [RXRPC_CALL_SUCCEEDED] = "Complete", 358c3e34a4SDavid Howells [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort", 368c3e34a4SDavid Howells [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort", 37f5c17aaeSDavid Howells [RXRPC_CALL_LOCAL_ERROR] = "LocError", 388c3e34a4SDavid Howells [RXRPC_CALL_NETWORK_ERROR] = "NetError", 398c3e34a4SDavid Howells }; 408c3e34a4SDavid Howells 418c3e34a4SDavid Howells struct kmem_cache *rxrpc_call_jar; 428c3e34a4SDavid Howells 43b7a7d674SDavid Howells static struct semaphore rxrpc_call_limiter = 44b7a7d674SDavid Howells __SEMAPHORE_INITIALIZER(rxrpc_call_limiter, 1000); 45b7a7d674SDavid Howells static struct semaphore rxrpc_kernel_call_limiter = 46b7a7d674SDavid Howells __SEMAPHORE_INITIALIZER(rxrpc_kernel_call_limiter, 1000); 47b7a7d674SDavid Howells 4815f661dcSDavid Howells void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what) 4915f661dcSDavid Howells { 50f3441d41SDavid Howells struct rxrpc_local *local = call->local; 5115f661dcSDavid Howells bool busy; 5215f661dcSDavid Howells 5303fc55adSDavid Howells if (!test_bit(RXRPC_CALL_DISCONNECTED, &call->flags)) { 5415f661dcSDavid Howells spin_lock_bh(&local->lock); 5515f661dcSDavid Howells busy = !list_empty(&call->attend_link); 5615f661dcSDavid Howells trace_rxrpc_poke_call(call, busy, what); 5715f661dcSDavid Howells if (!busy) { 5815f661dcSDavid Howells rxrpc_get_call(call, rxrpc_call_get_poke); 5915f661dcSDavid Howells list_add_tail(&call->attend_link, &local->call_attend_q); 6015f661dcSDavid Howells } 6115f661dcSDavid Howells spin_unlock_bh(&local->lock); 6215f661dcSDavid Howells rxrpc_wake_up_io_thread(local); 6315f661dcSDavid Howells } 6415f661dcSDavid Howells } 6515f661dcSDavid Howells 66e99e88a9SKees Cook static void rxrpc_call_timer_expired(struct timer_list *t) 67248f219cSDavid Howells { 68e99e88a9SKees Cook struct rxrpc_call *call = from_timer(call, t, timer); 69248f219cSDavid Howells 70248f219cSDavid Howells _enter("%d", call->debug_id); 71248f219cSDavid Howells 7296b4059fSDavid Howells if (!__rxrpc_call_is_complete(call)) { 73334dfbfcSDavid Howells trace_rxrpc_timer_expired(call, jiffies); 745e6ef4f1SDavid Howells rxrpc_poke_call(call, rxrpc_call_poke_timer); 75fc7ab6d2SDavid Howells } 76248f219cSDavid Howells } 778c3e34a4SDavid Howells 784a7f62f9SDavid Howells void rxrpc_reduce_call_timer(struct rxrpc_call *call, 794a7f62f9SDavid Howells unsigned long expire_at, 804a7f62f9SDavid Howells unsigned long now, 814a7f62f9SDavid Howells enum rxrpc_timer_trace why) 824a7f62f9SDavid Howells { 834a7f62f9SDavid Howells trace_rxrpc_timer(call, why, now); 843feda9d6SDavid Howells timer_reduce(&call->timer, expire_at); 854a7f62f9SDavid Howells } 864a7f62f9SDavid Howells 879faaff59SDavid Howells static struct lock_class_key rxrpc_call_user_mutex_lock_class_key; 888c3e34a4SDavid Howells 893feda9d6SDavid Howells static void rxrpc_destroy_call(struct work_struct *); 903feda9d6SDavid Howells 918c3e34a4SDavid Howells /* 928c3e34a4SDavid Howells * find an extant server call 938c3e34a4SDavid Howells * - called in process context with IRQs enabled 948c3e34a4SDavid Howells */ 958c3e34a4SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, 968c3e34a4SDavid Howells unsigned long user_call_ID) 978c3e34a4SDavid Howells { 988c3e34a4SDavid Howells struct rxrpc_call *call; 998c3e34a4SDavid Howells struct rb_node *p; 1008c3e34a4SDavid Howells 1018c3e34a4SDavid Howells _enter("%p,%lx", rx, user_call_ID); 1028c3e34a4SDavid Howells 1038c3e34a4SDavid Howells read_lock(&rx->call_lock); 1048c3e34a4SDavid Howells 1058c3e34a4SDavid Howells p = rx->calls.rb_node; 1068c3e34a4SDavid Howells while (p) { 1078c3e34a4SDavid Howells call = rb_entry(p, struct rxrpc_call, sock_node); 1088c3e34a4SDavid Howells 1098c3e34a4SDavid Howells if (user_call_ID < call->user_call_ID) 1108c3e34a4SDavid Howells p = p->rb_left; 1118c3e34a4SDavid Howells else if (user_call_ID > call->user_call_ID) 1128c3e34a4SDavid Howells p = p->rb_right; 1138c3e34a4SDavid Howells else 1148c3e34a4SDavid Howells goto found_extant_call; 1158c3e34a4SDavid Howells } 1168c3e34a4SDavid Howells 1178c3e34a4SDavid Howells read_unlock(&rx->call_lock); 1188c3e34a4SDavid Howells _leave(" = NULL"); 1198c3e34a4SDavid Howells return NULL; 1208c3e34a4SDavid Howells 1218c3e34a4SDavid Howells found_extant_call: 122cb0fc0c9SDavid Howells rxrpc_get_call(call, rxrpc_call_get_sendmsg); 1238c3e34a4SDavid Howells read_unlock(&rx->call_lock); 124a0575429SDavid Howells _leave(" = %p [%d]", call, refcount_read(&call->ref)); 1258c3e34a4SDavid Howells return call; 1268c3e34a4SDavid Howells } 1278c3e34a4SDavid Howells 1288c3e34a4SDavid Howells /* 1298c3e34a4SDavid Howells * allocate a new call 1308c3e34a4SDavid Howells */ 131a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp, 132a25e21f0SDavid Howells unsigned int debug_id) 1338c3e34a4SDavid Howells { 1348c3e34a4SDavid Howells struct rxrpc_call *call; 135d3be4d24SDavid Howells struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk)); 1368c3e34a4SDavid Howells 1378c3e34a4SDavid Howells call = kmem_cache_zalloc(rxrpc_call_jar, gfp); 1388c3e34a4SDavid Howells if (!call) 1398c3e34a4SDavid Howells return NULL; 1408c3e34a4SDavid Howells 141540b1c48SDavid Howells mutex_init(&call->user_mutex); 1429faaff59SDavid Howells 1439faaff59SDavid Howells /* Prevent lockdep reporting a deadlock false positive between the afs 1449faaff59SDavid Howells * filesystem and sys_sendmsg() via the mmap sem. 1459faaff59SDavid Howells */ 1469faaff59SDavid Howells if (rx->sk.sk_kern_sock) 1479faaff59SDavid Howells lockdep_set_class(&call->user_mutex, 1489faaff59SDavid Howells &rxrpc_call_user_mutex_lock_class_key); 1499faaff59SDavid Howells 150e99e88a9SKees Cook timer_setup(&call->timer, rxrpc_call_timer_expired, 0); 1513feda9d6SDavid Howells INIT_WORK(&call->destroyer, rxrpc_destroy_call); 152999b69f8SDavid Howells INIT_LIST_HEAD(&call->link); 1539d35d880SDavid Howells INIT_LIST_HEAD(&call->wait_link); 1548c3e34a4SDavid Howells INIT_LIST_HEAD(&call->accept_link); 155248f219cSDavid Howells INIT_LIST_HEAD(&call->recvmsg_link); 156248f219cSDavid Howells INIT_LIST_HEAD(&call->sock_link); 15715f661dcSDavid Howells INIT_LIST_HEAD(&call->attend_link); 158cf37b598SDavid Howells INIT_LIST_HEAD(&call->tx_sendmsg); 159a4ea4c47SDavid Howells INIT_LIST_HEAD(&call->tx_buffer); 1605d7edbc9SDavid Howells skb_queue_head_init(&call->recvmsg_queue); 1615d7edbc9SDavid Howells skb_queue_head_init(&call->rx_oos_queue); 16245025bceSDavid Howells init_waitqueue_head(&call->waitq); 16320acbd9aSDavid Howells spin_lock_init(&call->notify_lock); 164a4ea4c47SDavid Howells spin_lock_init(&call->tx_lock); 165a0575429SDavid Howells refcount_set(&call->ref, 1); 166a25e21f0SDavid Howells call->debug_id = debug_id; 167e754eba6SDavid Howells call->tx_total_len = -1; 168a158bdd3SDavid Howells call->next_rx_timo = 20 * HZ; 169a158bdd3SDavid Howells call->next_req_timo = 1 * HZ; 1705d7edbc9SDavid Howells atomic64_set(&call->ackr_window, 0x100000001ULL); 1718c3e34a4SDavid Howells 1728c3e34a4SDavid Howells memset(&call->sock_node, 0xed, sizeof(call->sock_node)); 1738c3e34a4SDavid Howells 17475e42126SDavid Howells call->rx_winsize = rxrpc_rx_window_size; 175248f219cSDavid Howells call->tx_winsize = 16; 17657494343SDavid Howells 1771fc4fa2aSDavid Howells if (RXRPC_TX_SMSS > 2190) 17857494343SDavid Howells call->cong_cwnd = 2; 1791fc4fa2aSDavid Howells else if (RXRPC_TX_SMSS > 1095) 1801fc4fa2aSDavid Howells call->cong_cwnd = 3; 1811fc4fa2aSDavid Howells else 1821fc4fa2aSDavid Howells call->cong_cwnd = 4; 183a4ea4c47SDavid Howells call->cong_ssthresh = RXRPC_TX_MAX_WINDOW; 184d3be4d24SDavid Howells 185d3be4d24SDavid Howells call->rxnet = rxnet; 1864700c4d8SDavid Howells call->rtt_avail = RXRPC_CALL_RTT_AVAIL_MASK; 187d3be4d24SDavid Howells atomic_inc(&rxnet->nr_calls); 1888c3e34a4SDavid Howells return call; 1898c3e34a4SDavid Howells } 1908c3e34a4SDavid Howells 1918c3e34a4SDavid Howells /* 192999b69f8SDavid Howells * Allocate a new client call. 1938c3e34a4SDavid Howells */ 1949faaff59SDavid Howells static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx, 1959faaff59SDavid Howells struct sockaddr_rxrpc *srx, 196f3441d41SDavid Howells struct rxrpc_conn_parameters *cp, 197f3441d41SDavid Howells struct rxrpc_call_params *p, 198a25e21f0SDavid Howells gfp_t gfp, 199a25e21f0SDavid Howells unsigned int debug_id) 2008c3e34a4SDavid Howells { 2018c3e34a4SDavid Howells struct rxrpc_call *call; 20257494343SDavid Howells ktime_t now; 203f3441d41SDavid Howells int ret; 2048c3e34a4SDavid Howells 2058c3e34a4SDavid Howells _enter(""); 2068c3e34a4SDavid Howells 207a25e21f0SDavid Howells call = rxrpc_alloc_call(rx, gfp, debug_id); 2088c3e34a4SDavid Howells if (!call) 2098c3e34a4SDavid Howells return ERR_PTR(-ENOMEM); 21057494343SDavid Howells now = ktime_get_real(); 21157494343SDavid Howells call->acks_latest_ts = now; 21257494343SDavid Howells call->cong_tstamp = now; 213f3441d41SDavid Howells call->dest_srx = *srx; 214f3441d41SDavid Howells call->interruptibility = p->interruptibility; 215f3441d41SDavid Howells call->tx_total_len = p->tx_total_len; 216f3441d41SDavid Howells call->key = key_get(cp->key); 217f3441d41SDavid Howells call->local = rxrpc_get_local(cp->local, rxrpc_local_get_call); 218fdb99487SDavid Howells call->security_level = cp->security_level; 219f3441d41SDavid Howells if (p->kernel) 220f3441d41SDavid Howells __set_bit(RXRPC_CALL_KERNEL, &call->flags); 221f3441d41SDavid Howells if (cp->upgrade) 222f3441d41SDavid Howells __set_bit(RXRPC_CALL_UPGRADE, &call->flags); 223f3441d41SDavid Howells if (cp->exclusive) 224f3441d41SDavid Howells __set_bit(RXRPC_CALL_EXCLUSIVE, &call->flags); 225f3441d41SDavid Howells 226f3441d41SDavid Howells ret = rxrpc_init_client_call_security(call); 227f3441d41SDavid Howells if (ret < 0) { 22896b4059fSDavid Howells rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, ret); 229f3441d41SDavid Howells rxrpc_put_call(call, rxrpc_call_put_discard_error); 230f3441d41SDavid Howells return ERR_PTR(ret); 231f3441d41SDavid Howells } 232f3441d41SDavid Howells 23396b4059fSDavid Howells rxrpc_set_call_state(call, RXRPC_CALL_CLIENT_AWAIT_CONN); 23496b4059fSDavid Howells 235f3441d41SDavid Howells trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 236f3441d41SDavid Howells p->user_call_ID, rxrpc_call_new_client); 237999b69f8SDavid Howells 238999b69f8SDavid Howells _leave(" = %p", call); 239999b69f8SDavid Howells return call; 240999b69f8SDavid Howells } 241999b69f8SDavid Howells 242999b69f8SDavid Howells /* 243248f219cSDavid Howells * Initiate the call ack/resend/expiry timer. 244999b69f8SDavid Howells */ 2459d35d880SDavid Howells void rxrpc_start_call_timer(struct rxrpc_call *call) 246999b69f8SDavid Howells { 247a158bdd3SDavid Howells unsigned long now = jiffies; 248a158bdd3SDavid Howells unsigned long j = now + MAX_JIFFY_OFFSET; 249999b69f8SDavid Howells 250530403d9SDavid Howells call->delay_ack_at = j; 251bd1fdf8cSDavid Howells call->ack_lost_at = j; 252a158bdd3SDavid Howells call->resend_at = j; 253a158bdd3SDavid Howells call->ping_at = j; 2545e6ef4f1SDavid Howells call->keepalive_at = j; 255a158bdd3SDavid Howells call->expect_rx_by = j; 256a158bdd3SDavid Howells call->expect_req_by = j; 257a158bdd3SDavid Howells call->expect_term_by = j; 258a158bdd3SDavid Howells call->timer.expires = now; 2598c3e34a4SDavid Howells } 2608c3e34a4SDavid Howells 2618c3e34a4SDavid Howells /* 262b7a7d674SDavid Howells * Wait for a call slot to become available. 263b7a7d674SDavid Howells */ 264b7a7d674SDavid Howells static struct semaphore *rxrpc_get_call_slot(struct rxrpc_call_params *p, gfp_t gfp) 265b7a7d674SDavid Howells { 266b7a7d674SDavid Howells struct semaphore *limiter = &rxrpc_call_limiter; 267b7a7d674SDavid Howells 268b7a7d674SDavid Howells if (p->kernel) 269b7a7d674SDavid Howells limiter = &rxrpc_kernel_call_limiter; 270b7a7d674SDavid Howells if (p->interruptibility == RXRPC_UNINTERRUPTIBLE) { 271b7a7d674SDavid Howells down(limiter); 272b7a7d674SDavid Howells return limiter; 273b7a7d674SDavid Howells } 274b7a7d674SDavid Howells return down_interruptible(limiter) < 0 ? NULL : limiter; 275b7a7d674SDavid Howells } 276b7a7d674SDavid Howells 277b7a7d674SDavid Howells /* 278b7a7d674SDavid Howells * Release a call slot. 279b7a7d674SDavid Howells */ 280b7a7d674SDavid Howells static void rxrpc_put_call_slot(struct rxrpc_call *call) 281b7a7d674SDavid Howells { 282b7a7d674SDavid Howells struct semaphore *limiter = &rxrpc_call_limiter; 283b7a7d674SDavid Howells 284b7a7d674SDavid Howells if (test_bit(RXRPC_CALL_KERNEL, &call->flags)) 285b7a7d674SDavid Howells limiter = &rxrpc_kernel_call_limiter; 286b7a7d674SDavid Howells up(limiter); 287b7a7d674SDavid Howells } 288b7a7d674SDavid Howells 289b7a7d674SDavid Howells /* 2909d35d880SDavid Howells * Start the process of connecting a call. We obtain a peer and a connection 2919d35d880SDavid Howells * bundle, but the actual association of a call with a connection is offloaded 2929d35d880SDavid Howells * to the I/O thread to simplify locking. 2939d35d880SDavid Howells */ 2949d35d880SDavid Howells static int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp) 2959d35d880SDavid Howells { 2969d35d880SDavid Howells struct rxrpc_local *local = call->local; 29701644a1fSDavid Howells int ret = -ENOMEM; 2989d35d880SDavid Howells 2999d35d880SDavid Howells _enter("{%d,%lx},", call->debug_id, call->user_call_ID); 3009d35d880SDavid Howells 3019d35d880SDavid Howells call->peer = rxrpc_lookup_peer(local, &call->dest_srx, gfp); 3029d35d880SDavid Howells if (!call->peer) 3039d35d880SDavid Howells goto error; 3049d35d880SDavid Howells 3059d35d880SDavid Howells ret = rxrpc_look_up_bundle(call, gfp); 3069d35d880SDavid Howells if (ret < 0) 3079d35d880SDavid Howells goto error; 3089d35d880SDavid Howells 3099d35d880SDavid Howells trace_rxrpc_client(NULL, -1, rxrpc_client_queue_new_call); 3109d35d880SDavid Howells rxrpc_get_call(call, rxrpc_call_get_io_thread); 3119d35d880SDavid Howells spin_lock(&local->client_call_lock); 3129d35d880SDavid Howells list_add_tail(&call->wait_link, &local->new_client_calls); 3139d35d880SDavid Howells spin_unlock(&local->client_call_lock); 3149d35d880SDavid Howells rxrpc_wake_up_io_thread(local); 3159d35d880SDavid Howells return 0; 3169d35d880SDavid Howells 3179d35d880SDavid Howells error: 3189d35d880SDavid Howells __set_bit(RXRPC_CALL_DISCONNECTED, &call->flags); 3199d35d880SDavid Howells return ret; 3209d35d880SDavid Howells } 3219d35d880SDavid Howells 3229d35d880SDavid Howells /* 323540b1c48SDavid Howells * Set up a call for the given parameters. 324540b1c48SDavid Howells * - Called with the socket lock held, which it must release. 325540b1c48SDavid Howells * - If it returns a call, the call's lock will need releasing by the caller. 3268c3e34a4SDavid Howells */ 3278c3e34a4SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, 32819ffa01cSDavid Howells struct rxrpc_conn_parameters *cp, 329999b69f8SDavid Howells struct sockaddr_rxrpc *srx, 33048124178SDavid Howells struct rxrpc_call_params *p, 331a25e21f0SDavid Howells gfp_t gfp, 332a25e21f0SDavid Howells unsigned int debug_id) 333540b1c48SDavid Howells __releases(&rx->sk.sk_lock.slock) 33488f2a825SDavid Howells __acquires(&call->user_mutex) 3358c3e34a4SDavid Howells { 3368c3e34a4SDavid Howells struct rxrpc_call *call, *xcall; 337d3be4d24SDavid Howells struct rxrpc_net *rxnet; 338b7a7d674SDavid Howells struct semaphore *limiter; 3398c3e34a4SDavid Howells struct rb_node *parent, **pp; 340999b69f8SDavid Howells int ret; 3418c3e34a4SDavid Howells 34248124178SDavid Howells _enter("%p,%lx", rx, p->user_call_ID); 3438c3e34a4SDavid Howells 344b7a7d674SDavid Howells limiter = rxrpc_get_call_slot(p, gfp); 345b0f571ecSDavid Howells if (!limiter) { 346b0f571ecSDavid Howells release_sock(&rx->sk); 347b7a7d674SDavid Howells return ERR_PTR(-ERESTARTSYS); 348b0f571ecSDavid Howells } 349b7a7d674SDavid Howells 350f3441d41SDavid Howells call = rxrpc_alloc_client_call(rx, srx, cp, p, gfp, debug_id); 3518c3e34a4SDavid Howells if (IS_ERR(call)) { 352540b1c48SDavid Howells release_sock(&rx->sk); 353b7a7d674SDavid Howells up(limiter); 3548c3e34a4SDavid Howells _leave(" = %ld", PTR_ERR(call)); 3558c3e34a4SDavid Howells return call; 3568c3e34a4SDavid Howells } 3578c3e34a4SDavid Howells 358540b1c48SDavid Howells /* We need to protect a partially set up call against the user as we 359540b1c48SDavid Howells * will be acting outside the socket lock. 360540b1c48SDavid Howells */ 361540b1c48SDavid Howells mutex_lock(&call->user_mutex); 362540b1c48SDavid Howells 363999b69f8SDavid Howells /* Publish the call, even though it is incompletely set up as yet */ 3648c3e34a4SDavid Howells write_lock(&rx->call_lock); 3658c3e34a4SDavid Howells 3668c3e34a4SDavid Howells pp = &rx->calls.rb_node; 3678c3e34a4SDavid Howells parent = NULL; 3688c3e34a4SDavid Howells while (*pp) { 3698c3e34a4SDavid Howells parent = *pp; 3708c3e34a4SDavid Howells xcall = rb_entry(parent, struct rxrpc_call, sock_node); 3718c3e34a4SDavid Howells 37248124178SDavid Howells if (p->user_call_ID < xcall->user_call_ID) 3738c3e34a4SDavid Howells pp = &(*pp)->rb_left; 37448124178SDavid Howells else if (p->user_call_ID > xcall->user_call_ID) 3758c3e34a4SDavid Howells pp = &(*pp)->rb_right; 3768c3e34a4SDavid Howells else 377357f5ef6SDavid Howells goto error_dup_user_ID; 3788c3e34a4SDavid Howells } 3798c3e34a4SDavid Howells 380248f219cSDavid Howells rcu_assign_pointer(call->socket, rx); 38148124178SDavid Howells call->user_call_ID = p->user_call_ID; 382357f5ef6SDavid Howells __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); 383cb0fc0c9SDavid Howells rxrpc_get_call(call, rxrpc_call_get_userid); 3848c3e34a4SDavid Howells rb_link_node(&call->sock_node, parent, pp); 3858c3e34a4SDavid Howells rb_insert_color(&call->sock_node, &rx->calls); 386248f219cSDavid Howells list_add(&call->sock_link, &rx->sock_calls); 387248f219cSDavid Howells 3888c3e34a4SDavid Howells write_unlock(&rx->call_lock); 3898c3e34a4SDavid Howells 390d3be4d24SDavid Howells rxnet = call->rxnet; 3913dd9c8b5SDavid Howells spin_lock(&rxnet->call_lock); 392ad25f5cbSDavid Howells list_add_tail_rcu(&call->link, &rxnet->calls); 3933dd9c8b5SDavid Howells spin_unlock(&rxnet->call_lock); 3948c3e34a4SDavid Howells 395540b1c48SDavid Howells /* From this point on, the call is protected by its own lock. */ 396540b1c48SDavid Howells release_sock(&rx->sk); 397540b1c48SDavid Howells 398248f219cSDavid Howells /* Set up or get a connection record and set the protocol parameters, 399248f219cSDavid Howells * including channel number and call ID. 400248f219cSDavid Howells */ 4011bab27afSDavid Howells ret = rxrpc_connect_call(call, gfp); 402999b69f8SDavid Howells if (ret < 0) 40365550098SDavid Howells goto error_attached_to_socket; 404999b69f8SDavid Howells 4058c3e34a4SDavid Howells _leave(" = %p [new]", call); 4068c3e34a4SDavid Howells return call; 4078c3e34a4SDavid Howells 4088c3e34a4SDavid Howells /* We unexpectedly found the user ID in the list after taking 4098c3e34a4SDavid Howells * the call_lock. This shouldn't happen unless the user races 4108c3e34a4SDavid Howells * with itself and tries to add the same user ID twice at the 4118c3e34a4SDavid Howells * same time in different threads. 4128c3e34a4SDavid Howells */ 413357f5ef6SDavid Howells error_dup_user_ID: 4148c3e34a4SDavid Howells write_unlock(&rx->call_lock); 415540b1c48SDavid Howells release_sock(&rx->sk); 41696b4059fSDavid Howells rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, -EEXIST); 417cb0fc0c9SDavid Howells trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 0, 418cb0fc0c9SDavid Howells rxrpc_call_see_userid_exists); 419540b1c48SDavid Howells mutex_unlock(&call->user_mutex); 420cb0fc0c9SDavid Howells rxrpc_put_call(call, rxrpc_call_put_userid_exists); 42165550098SDavid Howells _leave(" = -EEXIST"); 42265550098SDavid Howells return ERR_PTR(-EEXIST); 42365550098SDavid Howells 42465550098SDavid Howells /* We got an error, but the call is attached to the socket and is in 4259d35d880SDavid Howells * need of release. However, we might now race with recvmsg() when it 4269d35d880SDavid Howells * completion notifies the socket. Return 0 from sys_sendmsg() and 42765550098SDavid Howells * leave the error to recvmsg() to deal with. 42865550098SDavid Howells */ 42965550098SDavid Howells error_attached_to_socket: 430cb0fc0c9SDavid Howells trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), ret, 431cb0fc0c9SDavid Howells rxrpc_call_see_connect_failed); 4329d35d880SDavid Howells rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, 0, ret); 43365550098SDavid Howells _leave(" = c=%08x [err]", call->debug_id); 43465550098SDavid Howells return call; 4358c3e34a4SDavid Howells } 4368c3e34a4SDavid Howells 4378c3e34a4SDavid Howells /* 438248f219cSDavid Howells * Set up an incoming call. call->conn points to the connection. 439248f219cSDavid Howells * This is called in BH context and isn't allowed to fail. 4408c3e34a4SDavid Howells */ 441248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *rx, 442248f219cSDavid Howells struct rxrpc_call *call, 44342886ffeSDavid Howells struct sk_buff *skb) 4448c3e34a4SDavid Howells { 445248f219cSDavid Howells struct rxrpc_connection *conn = call->conn; 44642886ffeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 447248f219cSDavid Howells u32 chan; 4488c3e34a4SDavid Howells 449248f219cSDavid Howells _enter(",%d", call->conn->debug_id); 4508c3e34a4SDavid Howells 451248f219cSDavid Howells rcu_assign_pointer(call->socket, rx); 452248f219cSDavid Howells call->call_id = sp->hdr.callNumber; 453f3441d41SDavid Howells call->dest_srx.srx_service = sp->hdr.serviceId; 454248f219cSDavid Howells call->cid = sp->hdr.cid; 45557494343SDavid Howells call->cong_tstamp = skb->tstamp; 4568c3e34a4SDavid Howells 457a343b174SDavid Howells __set_bit(RXRPC_CALL_EXPOSED, &call->flags); 45896b4059fSDavid Howells rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING); 459a343b174SDavid Howells 4605e6ef4f1SDavid Howells spin_lock(&conn->state_lock); 4615e6ef4f1SDavid Howells 4625e6ef4f1SDavid Howells switch (conn->state) { 4635e6ef4f1SDavid Howells case RXRPC_CONN_SERVICE_UNSECURED: 4645e6ef4f1SDavid Howells case RXRPC_CONN_SERVICE_CHALLENGING: 46596b4059fSDavid Howells rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING); 4665e6ef4f1SDavid Howells break; 4675e6ef4f1SDavid Howells case RXRPC_CONN_SERVICE: 46896b4059fSDavid Howells rxrpc_set_call_state(call, RXRPC_CALL_SERVER_RECV_REQUEST); 4695e6ef4f1SDavid Howells break; 4705e6ef4f1SDavid Howells 471a00ce28bSDavid Howells case RXRPC_CONN_ABORTED: 47296b4059fSDavid Howells rxrpc_set_call_completion(call, conn->completion, 4735e6ef4f1SDavid Howells conn->abort_code, conn->error); 4745e6ef4f1SDavid Howells break; 4755e6ef4f1SDavid Howells default: 4765e6ef4f1SDavid Howells BUG(); 4775e6ef4f1SDavid Howells } 4785e6ef4f1SDavid Howells 4795040011dSDavid Howells rxrpc_get_call(call, rxrpc_call_get_io_thread); 4805040011dSDavid Howells 481248f219cSDavid Howells /* Set the channel for this call. We don't get channel_lock as we're 482248f219cSDavid Howells * only defending against the data_ready handler (which we're called 483248f219cSDavid Howells * from) and the RESPONSE packet parser (which is only really 484248f219cSDavid Howells * interested in call_counter and can cope with a disagreement with the 485248f219cSDavid Howells * call pointer). 4868c3e34a4SDavid Howells */ 487248f219cSDavid Howells chan = sp->hdr.cid & RXRPC_CHANNELMASK; 488248f219cSDavid Howells conn->channels[chan].call_counter = call->call_id; 489248f219cSDavid Howells conn->channels[chan].call_id = call->call_id; 4909d35d880SDavid Howells conn->channels[chan].call = call; 4915e6ef4f1SDavid Howells spin_unlock(&conn->state_lock); 4928c3e34a4SDavid Howells 4932cc80086SDavid Howells spin_lock(&conn->peer->lock); 49429fb4ec3SDavid Howells hlist_add_head(&call->error_link, &conn->peer->error_targets); 4952cc80086SDavid Howells spin_unlock(&conn->peer->lock); 4968c3e34a4SDavid Howells 497248f219cSDavid Howells rxrpc_start_call_timer(call); 498248f219cSDavid Howells _leave(""); 4998c3e34a4SDavid Howells } 5008c3e34a4SDavid Howells 5018c3e34a4SDavid Howells /* 502e34d4234SDavid Howells * Note the re-emergence of a call. 503e34d4234SDavid Howells */ 504cb0fc0c9SDavid Howells void rxrpc_see_call(struct rxrpc_call *call, enum rxrpc_call_trace why) 505e34d4234SDavid Howells { 506e34d4234SDavid Howells if (call) { 507cb0fc0c9SDavid Howells int r = refcount_read(&call->ref); 508e34d4234SDavid Howells 509cb0fc0c9SDavid Howells trace_rxrpc_call(call->debug_id, r, 0, why); 510e34d4234SDavid Howells } 511e34d4234SDavid Howells } 512e34d4234SDavid Howells 5135e6ef4f1SDavid Howells struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *call, 5145e6ef4f1SDavid Howells enum rxrpc_call_trace why) 5154a7f62f9SDavid Howells { 516cb0fc0c9SDavid Howells int r; 5174a7f62f9SDavid Howells 5185e6ef4f1SDavid Howells if (!call || !__refcount_inc_not_zero(&call->ref, &r)) 5195e6ef4f1SDavid Howells return NULL; 520cb0fc0c9SDavid Howells trace_rxrpc_call(call->debug_id, r + 1, 0, why); 5215e6ef4f1SDavid Howells return call; 5224a7f62f9SDavid Howells } 5234a7f62f9SDavid Howells 524e34d4234SDavid Howells /* 525e34d4234SDavid Howells * Note the addition of a ref on a call. 526e34d4234SDavid Howells */ 527cb0fc0c9SDavid Howells void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace why) 528e34d4234SDavid Howells { 529cb0fc0c9SDavid Howells int r; 530e34d4234SDavid Howells 531cb0fc0c9SDavid Howells __refcount_inc(&call->ref, &r); 532cb0fc0c9SDavid Howells trace_rxrpc_call(call->debug_id, r + 1, 0, why); 533e34d4234SDavid Howells } 534e34d4234SDavid Howells 535e34d4234SDavid Howells /* 536a4ea4c47SDavid Howells * Clean up the Rx skb ring. 537a641fd00SDavid Howells */ 538a641fd00SDavid Howells static void rxrpc_cleanup_ring(struct rxrpc_call *call) 539a641fd00SDavid Howells { 5405d7edbc9SDavid Howells skb_queue_purge(&call->recvmsg_queue); 5415d7edbc9SDavid Howells skb_queue_purge(&call->rx_oos_queue); 542a641fd00SDavid Howells } 543a641fd00SDavid Howells 544a641fd00SDavid Howells /* 545248f219cSDavid Howells * Detach a call from its owning socket. 5468c3e34a4SDavid Howells */ 5478d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) 5488c3e34a4SDavid Howells { 549248f219cSDavid Howells struct rxrpc_connection *conn = call->conn; 5509d35d880SDavid Howells bool put = false, putu = false; 551248f219cSDavid Howells 552a0575429SDavid Howells _enter("{%d,%d}", call->debug_id, refcount_read(&call->ref)); 553248f219cSDavid Howells 554cb0fc0c9SDavid Howells trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 555cb0fc0c9SDavid Howells call->flags, rxrpc_call_see_release); 5568c3e34a4SDavid Howells 5578c3e34a4SDavid Howells if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) 5588c3e34a4SDavid Howells BUG(); 5598c3e34a4SDavid Howells 560b7a7d674SDavid Howells rxrpc_put_call_slot(call); 5618c3e34a4SDavid Howells 562248f219cSDavid Howells /* Make sure we don't get any more notifications */ 563*223f5901SDavid Howells spin_lock(&rx->recvmsg_lock); 564e653cfe4SDavid Howells 565248f219cSDavid Howells if (!list_empty(&call->recvmsg_link)) { 5668c3e34a4SDavid Howells _debug("unlinking once-pending call %p { e=%lx f=%lx }", 5678c3e34a4SDavid Howells call, call->events, call->flags); 568248f219cSDavid Howells list_del(&call->recvmsg_link); 569248f219cSDavid Howells put = true; 570248f219cSDavid Howells } 571248f219cSDavid Howells 572248f219cSDavid Howells /* list_empty() must return false in rxrpc_notify_socket() */ 573248f219cSDavid Howells call->recvmsg_link.next = NULL; 574248f219cSDavid Howells call->recvmsg_link.prev = NULL; 575248f219cSDavid Howells 576*223f5901SDavid Howells spin_unlock(&rx->recvmsg_lock); 577248f219cSDavid Howells if (put) 578cb0fc0c9SDavid Howells rxrpc_put_call(call, rxrpc_call_put_unnotify); 579248f219cSDavid Howells 580248f219cSDavid Howells write_lock(&rx->call_lock); 581248f219cSDavid Howells 582248f219cSDavid Howells if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { 5838c3e34a4SDavid Howells rb_erase(&call->sock_node, &rx->calls); 5848c3e34a4SDavid Howells memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); 5859d35d880SDavid Howells putu = true; 5868c3e34a4SDavid Howells } 5878c3e34a4SDavid Howells 588248f219cSDavid Howells list_del(&call->sock_link); 589248f219cSDavid Howells write_unlock(&rx->call_lock); 5908c3e34a4SDavid Howells 591248f219cSDavid Howells _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); 5928c3e34a4SDavid Howells 5939d35d880SDavid Howells if (putu) 5949d35d880SDavid Howells rxrpc_put_call(call, rxrpc_call_put_userid); 5959d35d880SDavid Howells 5968c3e34a4SDavid Howells _leave(""); 5978c3e34a4SDavid Howells } 5988c3e34a4SDavid Howells 5998c3e34a4SDavid Howells /* 6008c3e34a4SDavid Howells * release all the calls associated with a socket 6018c3e34a4SDavid Howells */ 6028c3e34a4SDavid Howells void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) 6038c3e34a4SDavid Howells { 6048c3e34a4SDavid Howells struct rxrpc_call *call; 6058c3e34a4SDavid Howells 6068c3e34a4SDavid Howells _enter("%p", rx); 6078c3e34a4SDavid Howells 6080360da6dSDavid Howells while (!list_empty(&rx->to_be_accepted)) { 6090360da6dSDavid Howells call = list_entry(rx->to_be_accepted.next, 6100360da6dSDavid Howells struct rxrpc_call, accept_link); 6110360da6dSDavid Howells list_del(&call->accept_link); 61257af281eSDavid Howells rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET, 61357af281eSDavid Howells rxrpc_abort_call_sock_release_tba); 614cb0fc0c9SDavid Howells rxrpc_put_call(call, rxrpc_call_put_release_sock_tba); 6150360da6dSDavid Howells } 6160360da6dSDavid Howells 617248f219cSDavid Howells while (!list_empty(&rx->sock_calls)) { 618248f219cSDavid Howells call = list_entry(rx->sock_calls.next, 619248f219cSDavid Howells struct rxrpc_call, sock_link); 620cb0fc0c9SDavid Howells rxrpc_get_call(call, rxrpc_call_get_release_sock); 62157af281eSDavid Howells rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET, 62257af281eSDavid Howells rxrpc_abort_call_sock_release); 6238d94aa38SDavid Howells rxrpc_release_call(rx, call); 624cb0fc0c9SDavid Howells rxrpc_put_call(call, rxrpc_call_put_release_sock); 6258c3e34a4SDavid Howells } 6268c3e34a4SDavid Howells 6278c3e34a4SDavid Howells _leave(""); 6288c3e34a4SDavid Howells } 6298c3e34a4SDavid Howells 6308c3e34a4SDavid Howells /* 6318c3e34a4SDavid Howells * release a call 6328c3e34a4SDavid Howells */ 633cb0fc0c9SDavid Howells void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace why) 6348c3e34a4SDavid Howells { 635d3be4d24SDavid Howells struct rxrpc_net *rxnet = call->rxnet; 63648c9e0ecSDavid Howells unsigned int debug_id = call->debug_id; 637a0575429SDavid Howells bool dead; 638cb0fc0c9SDavid Howells int r; 639e34d4234SDavid Howells 6408c3e34a4SDavid Howells ASSERT(call != NULL); 6418c3e34a4SDavid Howells 642cb0fc0c9SDavid Howells dead = __refcount_dec_and_test(&call->ref, &r); 643cb0fc0c9SDavid Howells trace_rxrpc_call(debug_id, r - 1, 0, why); 644a0575429SDavid Howells if (dead) { 64596b4059fSDavid Howells ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE); 646e34d4234SDavid Howells 6472baec2c3SDavid Howells if (!list_empty(&call->link)) { 6483dd9c8b5SDavid Howells spin_lock(&rxnet->call_lock); 649248f219cSDavid Howells list_del_init(&call->link); 6503dd9c8b5SDavid Howells spin_unlock(&rxnet->call_lock); 6512baec2c3SDavid Howells } 652e34d4234SDavid Howells 6538d94aa38SDavid Howells rxrpc_cleanup_call(call); 654e34d4234SDavid Howells } 6558c3e34a4SDavid Howells } 6568c3e34a4SDavid Howells 6578c3e34a4SDavid Howells /* 6583feda9d6SDavid Howells * Free up the call under RCU. 659dee46364SDavid Howells */ 6603feda9d6SDavid Howells static void rxrpc_rcu_free_call(struct rcu_head *rcu) 661dee46364SDavid Howells { 6623feda9d6SDavid Howells struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); 6633feda9d6SDavid Howells struct rxrpc_net *rxnet = READ_ONCE(call->rxnet); 664dee46364SDavid Howells 665dee46364SDavid Howells kmem_cache_free(rxrpc_call_jar, call); 666d3be4d24SDavid Howells if (atomic_dec_and_test(&rxnet->nr_calls)) 6675bb053beSLinus Torvalds wake_up_var(&rxnet->nr_calls); 668dee46364SDavid Howells } 669dee46364SDavid Howells 670dee46364SDavid Howells /* 6713feda9d6SDavid Howells * Final call destruction - but must be done in process context. 672963485d4SDavid Howells */ 6733feda9d6SDavid Howells static void rxrpc_destroy_call(struct work_struct *work) 674963485d4SDavid Howells { 6753feda9d6SDavid Howells struct rxrpc_call *call = container_of(work, struct rxrpc_call, destroyer); 676a4ea4c47SDavid Howells struct rxrpc_txbuf *txb; 677a4ea4c47SDavid Howells 6783feda9d6SDavid Howells del_timer_sync(&call->timer); 6798c3e34a4SDavid Howells 680a641fd00SDavid Howells rxrpc_cleanup_ring(call); 681cf37b598SDavid Howells while ((txb = list_first_entry_or_null(&call->tx_sendmsg, 682cf37b598SDavid Howells struct rxrpc_txbuf, call_link))) { 683cf37b598SDavid Howells list_del(&txb->call_link); 684cf37b598SDavid Howells rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned); 685cf37b598SDavid Howells } 686a4ea4c47SDavid Howells while ((txb = list_first_entry_or_null(&call->tx_buffer, 687a4ea4c47SDavid Howells struct rxrpc_txbuf, call_link))) { 688a4ea4c47SDavid Howells list_del(&txb->call_link); 689a4ea4c47SDavid Howells rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned); 690a4ea4c47SDavid Howells } 6915e6ef4f1SDavid Howells 692a4ea4c47SDavid Howells rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned); 6933feda9d6SDavid Howells rxrpc_put_connection(call->conn, rxrpc_conn_put_call); 6941bab27afSDavid Howells rxrpc_deactivate_bundle(call->bundle); 6951bab27afSDavid Howells rxrpc_put_bundle(call->bundle, rxrpc_bundle_put_call); 6963feda9d6SDavid Howells rxrpc_put_peer(call->peer, rxrpc_peer_put_call); 697f3441d41SDavid Howells rxrpc_put_local(call->local, rxrpc_local_put_call); 6983feda9d6SDavid Howells call_rcu(&call->rcu, rxrpc_rcu_free_call); 6993feda9d6SDavid Howells } 7008c3e34a4SDavid Howells 7013feda9d6SDavid Howells /* 7023feda9d6SDavid Howells * clean up a call 7033feda9d6SDavid Howells */ 7043feda9d6SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *call) 7053feda9d6SDavid Howells { 7063feda9d6SDavid Howells memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); 7073feda9d6SDavid Howells 70896b4059fSDavid Howells ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE); 7093feda9d6SDavid Howells ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); 7103feda9d6SDavid Howells 7115e6ef4f1SDavid Howells del_timer(&call->timer); 7123feda9d6SDavid Howells 7135e6ef4f1SDavid Howells if (rcu_read_lock_held()) 7143feda9d6SDavid Howells /* Can't use the rxrpc workqueue as we need to cancel/flush 7153feda9d6SDavid Howells * something that may be running/waiting there. 7163feda9d6SDavid Howells */ 7173feda9d6SDavid Howells schedule_work(&call->destroyer); 7183feda9d6SDavid Howells else 7193feda9d6SDavid Howells rxrpc_destroy_call(&call->destroyer); 7208c3e34a4SDavid Howells } 7218c3e34a4SDavid Howells 7228c3e34a4SDavid Howells /* 7232baec2c3SDavid Howells * Make sure that all calls are gone from a network namespace. To reach this 7242baec2c3SDavid Howells * point, any open UDP sockets in that namespace must have been closed, so any 7252baec2c3SDavid Howells * outstanding calls cannot be doing I/O. 7268c3e34a4SDavid Howells */ 7272baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *rxnet) 7288c3e34a4SDavid Howells { 7298c3e34a4SDavid Howells struct rxrpc_call *call; 7308c3e34a4SDavid Howells 7318c3e34a4SDavid Howells _enter(""); 7328d94aa38SDavid Howells 733b1302342SDavid Howells if (!list_empty(&rxnet->calls)) { 7343dd9c8b5SDavid Howells spin_lock(&rxnet->call_lock); 7358c3e34a4SDavid Howells 7362baec2c3SDavid Howells while (!list_empty(&rxnet->calls)) { 737b1302342SDavid Howells call = list_entry(rxnet->calls.next, 738b1302342SDavid Howells struct rxrpc_call, link); 7398c3e34a4SDavid Howells _debug("Zapping call %p", call); 7408c3e34a4SDavid Howells 741cb0fc0c9SDavid Howells rxrpc_see_call(call, rxrpc_call_see_zap); 7428c3e34a4SDavid Howells list_del_init(&call->link); 7438c3e34a4SDavid Howells 744248f219cSDavid Howells pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n", 745a0575429SDavid Howells call, refcount_read(&call->ref), 74696b4059fSDavid Howells rxrpc_call_states[__rxrpc_call_state(call)], 7478c3e34a4SDavid Howells call->flags, call->events); 7488c3e34a4SDavid Howells 7493dd9c8b5SDavid Howells spin_unlock(&rxnet->call_lock); 7508c3e34a4SDavid Howells cond_resched(); 7513dd9c8b5SDavid Howells spin_lock(&rxnet->call_lock); 7528c3e34a4SDavid Howells } 7538c3e34a4SDavid Howells 7543dd9c8b5SDavid Howells spin_unlock(&rxnet->call_lock); 755b1302342SDavid Howells } 756d3be4d24SDavid Howells 757d3be4d24SDavid Howells atomic_dec(&rxnet->nr_calls); 7585bb053beSLinus Torvalds wait_var_event(&rxnet->nr_calls, !atomic_read(&rxnet->nr_calls)); 7598c3e34a4SDavid Howells } 760