David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1 | /* RxRPC individual remote procedure call handling |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 13 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/slab.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/circ_buf.h> |
Tim Smith | 7727640 | 2014-03-03 23:04:45 +0000 | [diff] [blame] | 17 | #include <linux/spinlock_types.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 18 | #include <net/sock.h> |
| 19 | #include <net/af_rxrpc.h> |
| 20 | #include "ar-internal.h" |
| 21 | |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 22 | /* |
| 23 | * Maximum lifetime of a call (in jiffies). |
| 24 | */ |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 25 | unsigned int rxrpc_max_call_lifetime = 60 * HZ; |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 26 | |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 27 | const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = { |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 28 | [RXRPC_CALL_UNINITIALISED] = "Uninit ", |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 29 | [RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn", |
David Howells | 1f8481d | 2007-05-22 16:14:24 -0700 | [diff] [blame] | 30 | [RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq", |
| 31 | [RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl", |
| 32 | [RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl", |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 33 | [RXRPC_CALL_SERVER_PREALLOC] = "SvPrealc", |
David Howells | 1f8481d | 2007-05-22 16:14:24 -0700 | [diff] [blame] | 34 | [RXRPC_CALL_SERVER_SECURING] = "SvSecure", |
| 35 | [RXRPC_CALL_SERVER_ACCEPTING] = "SvAccept", |
| 36 | [RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq", |
| 37 | [RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq", |
| 38 | [RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl", |
| 39 | [RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK", |
| 40 | [RXRPC_CALL_COMPLETE] = "Complete", |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 41 | }; |
| 42 | |
| 43 | const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = { |
| 44 | [RXRPC_CALL_SUCCEEDED] = "Complete", |
David Howells | 1f8481d | 2007-05-22 16:14:24 -0700 | [diff] [blame] | 45 | [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort", |
| 46 | [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort", |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 47 | [RXRPC_CALL_LOCAL_ERROR] = "LocError", |
David Howells | 1f8481d | 2007-05-22 16:14:24 -0700 | [diff] [blame] | 48 | [RXRPC_CALL_NETWORK_ERROR] = "NetError", |
David Howells | 1f8481d | 2007-05-22 16:14:24 -0700 | [diff] [blame] | 49 | }; |
| 50 | |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 51 | const char rxrpc_call_traces[rxrpc_call__nr_trace][4] = { |
| 52 | [rxrpc_call_new_client] = "NWc", |
| 53 | [rxrpc_call_new_service] = "NWs", |
| 54 | [rxrpc_call_queued] = "QUE", |
| 55 | [rxrpc_call_queued_ref] = "QUR", |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 56 | [rxrpc_call_connected] = "CON", |
| 57 | [rxrpc_call_release] = "RLS", |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 58 | [rxrpc_call_seen] = "SEE", |
| 59 | [rxrpc_call_got] = "GOT", |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 60 | [rxrpc_call_got_userid] = "Gus", |
David Howells | cbd0089 | 2016-09-13 09:12:34 +0100 | [diff] [blame] | 61 | [rxrpc_call_got_kernel] = "Gke", |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 62 | [rxrpc_call_put] = "PUT", |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 63 | [rxrpc_call_put_userid] = "Pus", |
David Howells | cbd0089 | 2016-09-13 09:12:34 +0100 | [diff] [blame] | 64 | [rxrpc_call_put_kernel] = "Pke", |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 65 | [rxrpc_call_put_noqueue] = "PNQ", |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 66 | [rxrpc_call_error] = "*E*", |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 67 | }; |
| 68 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 69 | struct kmem_cache *rxrpc_call_jar; |
| 70 | LIST_HEAD(rxrpc_calls); |
| 71 | DEFINE_RWLOCK(rxrpc_call_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 72 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 73 | static void rxrpc_call_timer_expired(unsigned long _call) |
| 74 | { |
| 75 | struct rxrpc_call *call = (struct rxrpc_call *)_call; |
| 76 | |
| 77 | _enter("%d", call->debug_id); |
| 78 | |
| 79 | if (call->state < RXRPC_CALL_COMPLETE) |
| 80 | rxrpc_queue_call(call); |
| 81 | } |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 82 | |
| 83 | /* |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 84 | * find an extant server call |
| 85 | * - called in process context with IRQs enabled |
| 86 | */ |
| 87 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, |
| 88 | unsigned long user_call_ID) |
| 89 | { |
| 90 | struct rxrpc_call *call; |
| 91 | struct rb_node *p; |
| 92 | |
| 93 | _enter("%p,%lx", rx, user_call_ID); |
| 94 | |
| 95 | read_lock(&rx->call_lock); |
| 96 | |
| 97 | p = rx->calls.rb_node; |
| 98 | while (p) { |
| 99 | call = rb_entry(p, struct rxrpc_call, sock_node); |
| 100 | |
| 101 | if (user_call_ID < call->user_call_ID) |
| 102 | p = p->rb_left; |
| 103 | else if (user_call_ID > call->user_call_ID) |
| 104 | p = p->rb_right; |
| 105 | else |
| 106 | goto found_extant_call; |
| 107 | } |
| 108 | |
| 109 | read_unlock(&rx->call_lock); |
| 110 | _leave(" = NULL"); |
| 111 | return NULL; |
| 112 | |
| 113 | found_extant_call: |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 114 | rxrpc_get_call(call, rxrpc_call_got); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 115 | read_unlock(&rx->call_lock); |
| 116 | _leave(" = %p [%d]", call, atomic_read(&call->usage)); |
| 117 | return call; |
| 118 | } |
| 119 | |
| 120 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 121 | * allocate a new call |
| 122 | */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 123 | struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 124 | { |
| 125 | struct rxrpc_call *call; |
| 126 | |
| 127 | call = kmem_cache_zalloc(rxrpc_call_jar, gfp); |
| 128 | if (!call) |
| 129 | return NULL; |
| 130 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 131 | call->rxtx_buffer = kcalloc(RXRPC_RXTX_BUFF_SIZE, |
| 132 | sizeof(struct sk_buff *), |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 133 | gfp); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 134 | if (!call->rxtx_buffer) |
| 135 | goto nomem; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 136 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 137 | call->rxtx_annotations = kcalloc(RXRPC_RXTX_BUFF_SIZE, sizeof(u8), gfp); |
| 138 | if (!call->rxtx_annotations) |
| 139 | goto nomem_2; |
| 140 | |
| 141 | setup_timer(&call->timer, rxrpc_call_timer_expired, |
| 142 | (unsigned long)call); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 143 | INIT_WORK(&call->processor, &rxrpc_process_call); |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 144 | INIT_LIST_HEAD(&call->link); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 145 | INIT_LIST_HEAD(&call->chan_wait_link); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 146 | INIT_LIST_HEAD(&call->accept_link); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 147 | INIT_LIST_HEAD(&call->recvmsg_link); |
| 148 | INIT_LIST_HEAD(&call->sock_link); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 149 | init_waitqueue_head(&call->waitq); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 150 | spin_lock_init(&call->lock); |
| 151 | rwlock_init(&call->state_lock); |
| 152 | atomic_set(&call->usage, 1); |
| 153 | call->debug_id = atomic_inc_return(&rxrpc_debug_id); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 154 | |
| 155 | memset(&call->sock_node, 0xed, sizeof(call->sock_node)); |
| 156 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 157 | /* Leave space in the ring to handle a maxed-out jumbo packet */ |
David Howells | 75e4212 | 2016-09-13 22:36:22 +0100 | [diff] [blame] | 158 | call->rx_winsize = rxrpc_rx_window_size; |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 159 | call->tx_winsize = 16; |
| 160 | call->rx_expect_next = 1; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 161 | return call; |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 162 | |
| 163 | nomem_2: |
| 164 | kfree(call->rxtx_buffer); |
| 165 | nomem: |
| 166 | kmem_cache_free(rxrpc_call_jar, call); |
| 167 | return NULL; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | /* |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 171 | * Allocate a new client call. |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 172 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 173 | static struct rxrpc_call *rxrpc_alloc_client_call(struct sockaddr_rxrpc *srx, |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 174 | gfp_t gfp) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 175 | { |
| 176 | struct rxrpc_call *call; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 177 | |
| 178 | _enter(""); |
| 179 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 180 | call = rxrpc_alloc_call(gfp); |
| 181 | if (!call) |
| 182 | return ERR_PTR(-ENOMEM); |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 183 | call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 184 | call->service_id = srx->srx_service; |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 185 | |
| 186 | _leave(" = %p", call); |
| 187 | return call; |
| 188 | } |
| 189 | |
| 190 | /* |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 191 | * Initiate the call ack/resend/expiry timer. |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 192 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 193 | static void rxrpc_start_call_timer(struct rxrpc_call *call) |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 194 | { |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 195 | unsigned long expire_at; |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 196 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 197 | expire_at = jiffies + rxrpc_max_call_lifetime; |
| 198 | call->expire_at = expire_at; |
| 199 | call->ack_at = expire_at; |
| 200 | call->resend_at = expire_at; |
| 201 | call->timer.expires = expire_at; |
| 202 | add_timer(&call->timer); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | /* |
| 206 | * set up a call for the given data |
| 207 | * - called in process context with IRQs enabled |
| 208 | */ |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 209 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 210 | struct rxrpc_conn_parameters *cp, |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 211 | struct sockaddr_rxrpc *srx, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 212 | unsigned long user_call_ID, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 213 | gfp_t gfp) |
| 214 | { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 215 | struct rxrpc_call *call, *xcall; |
| 216 | struct rb_node *parent, **pp; |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 217 | const void *here = __builtin_return_address(0); |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 218 | int ret; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 219 | |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 220 | _enter("%p,%lx", rx, user_call_ID); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 221 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 222 | call = rxrpc_alloc_client_call(srx, gfp); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 223 | if (IS_ERR(call)) { |
| 224 | _leave(" = %ld", PTR_ERR(call)); |
| 225 | return call; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 226 | } |
| 227 | |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 228 | trace_rxrpc_call(call, rxrpc_call_new_client, atomic_read(&call->usage), |
| 229 | here, (const void *)user_call_ID); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 230 | |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 231 | /* Publish the call, even though it is incompletely set up as yet */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 232 | write_lock(&rx->call_lock); |
| 233 | |
| 234 | pp = &rx->calls.rb_node; |
| 235 | parent = NULL; |
| 236 | while (*pp) { |
| 237 | parent = *pp; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 238 | xcall = rb_entry(parent, struct rxrpc_call, sock_node); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 239 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 240 | if (user_call_ID < xcall->user_call_ID) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 241 | pp = &(*pp)->rb_left; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 242 | else if (user_call_ID > xcall->user_call_ID) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 243 | pp = &(*pp)->rb_right; |
| 244 | else |
David Howells | 357f5ef | 2016-09-17 10:49:12 +0100 | [diff] [blame] | 245 | goto error_dup_user_ID; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 246 | } |
| 247 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 248 | rcu_assign_pointer(call->socket, rx); |
David Howells | 357f5ef | 2016-09-17 10:49:12 +0100 | [diff] [blame] | 249 | call->user_call_ID = user_call_ID; |
| 250 | __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 251 | rxrpc_get_call(call, rxrpc_call_got_userid); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 252 | rb_link_node(&call->sock_node, parent, pp); |
| 253 | rb_insert_color(&call->sock_node, &rx->calls); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 254 | list_add(&call->sock_link, &rx->sock_calls); |
| 255 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 256 | write_unlock(&rx->call_lock); |
| 257 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 258 | write_lock(&rxrpc_call_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 259 | list_add_tail(&call->link, &rxrpc_calls); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 260 | write_unlock(&rxrpc_call_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 261 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 262 | /* Set up or get a connection record and set the protocol parameters, |
| 263 | * including channel number and call ID. |
| 264 | */ |
| 265 | ret = rxrpc_connect_call(call, cp, srx, gfp); |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 266 | if (ret < 0) |
| 267 | goto error; |
| 268 | |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 269 | trace_rxrpc_call(call, rxrpc_call_connected, atomic_read(&call->usage), |
| 270 | here, ERR_PTR(ret)); |
| 271 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 272 | spin_lock_bh(&call->conn->params.peer->lock); |
| 273 | hlist_add_head(&call->error_link, |
| 274 | &call->conn->params.peer->error_targets); |
| 275 | spin_unlock_bh(&call->conn->params.peer->lock); |
| 276 | |
| 277 | rxrpc_start_call_timer(call); |
| 278 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 279 | _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); |
| 280 | |
| 281 | _leave(" = %p [new]", call); |
| 282 | return call; |
| 283 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 284 | /* We unexpectedly found the user ID in the list after taking |
| 285 | * the call_lock. This shouldn't happen unless the user races |
| 286 | * with itself and tries to add the same user ID twice at the |
| 287 | * same time in different threads. |
| 288 | */ |
David Howells | 357f5ef | 2016-09-17 10:49:12 +0100 | [diff] [blame] | 289 | error_dup_user_ID: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 290 | write_unlock(&rx->call_lock); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 291 | ret = -EEXIST; |
David Howells | 357f5ef | 2016-09-17 10:49:12 +0100 | [diff] [blame] | 292 | |
| 293 | error: |
| 294 | __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, |
| 295 | RX_CALL_DEAD, ret); |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 296 | trace_rxrpc_call(call, rxrpc_call_error, atomic_read(&call->usage), |
| 297 | here, ERR_PTR(ret)); |
David Howells | 357f5ef | 2016-09-17 10:49:12 +0100 | [diff] [blame] | 298 | rxrpc_release_call(rx, call); |
| 299 | rxrpc_put_call(call, rxrpc_call_put); |
| 300 | _leave(" = %d", ret); |
| 301 | return ERR_PTR(ret); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | /* |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 305 | * Set up an incoming call. call->conn points to the connection. |
| 306 | * This is called in BH context and isn't allowed to fail. |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 307 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 308 | void rxrpc_incoming_call(struct rxrpc_sock *rx, |
| 309 | struct rxrpc_call *call, |
| 310 | struct sk_buff *skb) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 311 | { |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 312 | struct rxrpc_connection *conn = call->conn; |
David Howells | 42886ff | 2016-06-16 13:31:07 +0100 | [diff] [blame] | 313 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 314 | u32 chan; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 315 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 316 | _enter(",%d", call->conn->debug_id); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 317 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 318 | rcu_assign_pointer(call->socket, rx); |
| 319 | call->call_id = sp->hdr.callNumber; |
| 320 | call->service_id = sp->hdr.serviceId; |
| 321 | call->cid = sp->hdr.cid; |
| 322 | call->state = RXRPC_CALL_SERVER_ACCEPTING; |
| 323 | if (sp->hdr.securityIndex > 0) |
| 324 | call->state = RXRPC_CALL_SERVER_SECURING; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 325 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 326 | /* Set the channel for this call. We don't get channel_lock as we're |
| 327 | * only defending against the data_ready handler (which we're called |
| 328 | * from) and the RESPONSE packet parser (which is only really |
| 329 | * interested in call_counter and can cope with a disagreement with the |
| 330 | * call pointer). |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 331 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 332 | chan = sp->hdr.cid & RXRPC_CHANNELMASK; |
| 333 | conn->channels[chan].call_counter = call->call_id; |
| 334 | conn->channels[chan].call_id = call->call_id; |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 335 | rcu_assign_pointer(conn->channels[chan].call, call); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 336 | |
David Howells | 85f3227 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 337 | spin_lock(&conn->params.peer->lock); |
| 338 | hlist_add_head(&call->error_link, &conn->params.peer->error_targets); |
| 339 | spin_unlock(&conn->params.peer->lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 340 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 341 | _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); |
| 342 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 343 | rxrpc_start_call_timer(call); |
| 344 | _leave(""); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | /* |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 348 | * Queue a call's work processor, getting a ref to pass to the work queue. |
| 349 | */ |
| 350 | bool rxrpc_queue_call(struct rxrpc_call *call) |
| 351 | { |
| 352 | const void *here = __builtin_return_address(0); |
| 353 | int n = __atomic_add_unless(&call->usage, 1, 0); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 354 | if (n == 0) |
| 355 | return false; |
| 356 | if (rxrpc_queue_work(&call->processor)) |
David Howells | 2ab2721 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 357 | trace_rxrpc_call(call, rxrpc_call_queued, n + 1, here, NULL); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 358 | else |
| 359 | rxrpc_put_call(call, rxrpc_call_put_noqueue); |
| 360 | return true; |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * Queue a call's work processor, passing the callers ref to the work queue. |
| 365 | */ |
| 366 | bool __rxrpc_queue_call(struct rxrpc_call *call) |
| 367 | { |
| 368 | const void *here = __builtin_return_address(0); |
| 369 | int n = atomic_read(&call->usage); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 370 | ASSERTCMP(n, >=, 1); |
| 371 | if (rxrpc_queue_work(&call->processor)) |
David Howells | 2ab2721 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 372 | trace_rxrpc_call(call, rxrpc_call_queued_ref, n, here, NULL); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 373 | else |
| 374 | rxrpc_put_call(call, rxrpc_call_put_noqueue); |
| 375 | return true; |
| 376 | } |
| 377 | |
| 378 | /* |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 379 | * Note the re-emergence of a call. |
| 380 | */ |
| 381 | void rxrpc_see_call(struct rxrpc_call *call) |
| 382 | { |
| 383 | const void *here = __builtin_return_address(0); |
| 384 | if (call) { |
| 385 | int n = atomic_read(&call->usage); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 386 | |
David Howells | 2ab2721 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 387 | trace_rxrpc_call(call, rxrpc_call_seen, n, here, NULL); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 388 | } |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * Note the addition of a ref on a call. |
| 393 | */ |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 394 | void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 395 | { |
| 396 | const void *here = __builtin_return_address(0); |
| 397 | int n = atomic_inc_return(&call->usage); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 398 | |
David Howells | 2ab2721 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 399 | trace_rxrpc_call(call, op, n, here, NULL); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | /* |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 403 | * Detach a call from its owning socket. |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 404 | */ |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 405 | void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 406 | { |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 407 | const void *here = __builtin_return_address(0); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 408 | struct rxrpc_connection *conn = call->conn; |
| 409 | bool put = false; |
| 410 | int i; |
| 411 | |
| 412 | _enter("{%d,%d}", call->debug_id, atomic_read(&call->usage)); |
| 413 | |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 414 | trace_rxrpc_call(call, rxrpc_call_release, atomic_read(&call->usage), |
| 415 | here, (const void *)call->flags); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 416 | |
David Howells | a84a46d | 2016-09-17 10:49:14 +0100 | [diff] [blame^] | 417 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 418 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 419 | spin_lock_bh(&call->lock); |
| 420 | if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) |
| 421 | BUG(); |
| 422 | spin_unlock_bh(&call->lock); |
| 423 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 424 | del_timer_sync(&call->timer); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 425 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 426 | /* Make sure we don't get any more notifications */ |
| 427 | write_lock_bh(&rx->recvmsg_lock); |
David Howells | e653cfe | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 428 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 429 | if (!list_empty(&call->recvmsg_link)) { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 430 | _debug("unlinking once-pending call %p { e=%lx f=%lx }", |
| 431 | call, call->events, call->flags); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 432 | list_del(&call->recvmsg_link); |
| 433 | put = true; |
| 434 | } |
| 435 | |
| 436 | /* list_empty() must return false in rxrpc_notify_socket() */ |
| 437 | call->recvmsg_link.next = NULL; |
| 438 | call->recvmsg_link.prev = NULL; |
| 439 | |
| 440 | write_unlock_bh(&rx->recvmsg_lock); |
| 441 | if (put) |
| 442 | rxrpc_put_call(call, rxrpc_call_put); |
| 443 | |
| 444 | write_lock(&rx->call_lock); |
| 445 | |
| 446 | if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 447 | rb_erase(&call->sock_node, &rx->calls); |
| 448 | memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 449 | rxrpc_put_call(call, rxrpc_call_put_userid); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 450 | } |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 451 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 452 | list_del(&call->sock_link); |
| 453 | write_unlock(&rx->call_lock); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 454 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 455 | _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 456 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 457 | if (conn) |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 458 | rxrpc_disconnect_call(call); |
David Howells | e653cfe | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 459 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 460 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) { |
| 461 | rxrpc_free_skb(call->rxtx_buffer[i]); |
| 462 | call->rxtx_buffer[i] = NULL; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 463 | } |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 464 | |
| 465 | _leave(""); |
| 466 | } |
| 467 | |
| 468 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 469 | * release all the calls associated with a socket |
| 470 | */ |
| 471 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) |
| 472 | { |
| 473 | struct rxrpc_call *call; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 474 | |
| 475 | _enter("%p", rx); |
| 476 | |
David Howells | 0360da6 | 2016-09-17 10:49:11 +0100 | [diff] [blame] | 477 | while (!list_empty(&rx->to_be_accepted)) { |
| 478 | call = list_entry(rx->to_be_accepted.next, |
| 479 | struct rxrpc_call, accept_link); |
| 480 | list_del(&call->accept_link); |
| 481 | rxrpc_abort_call("SKR", call, 0, RX_CALL_DEAD, ECONNRESET); |
| 482 | rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT); |
| 483 | rxrpc_release_call(rx, call); |
| 484 | rxrpc_put_call(call, rxrpc_call_put); |
| 485 | } |
| 486 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 487 | while (!list_empty(&rx->sock_calls)) { |
| 488 | call = list_entry(rx->sock_calls.next, |
| 489 | struct rxrpc_call, sock_link); |
| 490 | rxrpc_get_call(call, rxrpc_call_got); |
| 491 | rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, ECONNRESET); |
| 492 | rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 493 | rxrpc_release_call(rx, call); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 494 | rxrpc_put_call(call, rxrpc_call_put); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 495 | } |
| 496 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 497 | _leave(""); |
| 498 | } |
| 499 | |
| 500 | /* |
| 501 | * release a call |
| 502 | */ |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 503 | void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 504 | { |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 505 | const void *here = __builtin_return_address(0); |
David Howells | 2ab2721 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 506 | int n; |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 507 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 508 | ASSERT(call != NULL); |
| 509 | |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 510 | n = atomic_dec_return(&call->usage); |
David Howells | 2ab2721 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 511 | trace_rxrpc_call(call, op, n, here, NULL); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 512 | ASSERTCMP(n, >=, 0); |
| 513 | if (n == 0) { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 514 | _debug("call %d dead", call->debug_id); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 515 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 516 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 517 | write_lock(&rxrpc_call_lock); |
| 518 | list_del_init(&call->link); |
| 519 | write_unlock(&rxrpc_call_lock); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 520 | |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 521 | rxrpc_cleanup_call(call); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 522 | } |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 523 | } |
| 524 | |
| 525 | /* |
David Howells | dee4636 | 2016-06-27 17:11:19 +0100 | [diff] [blame] | 526 | * Final call destruction under RCU. |
| 527 | */ |
| 528 | static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) |
| 529 | { |
| 530 | struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); |
| 531 | |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 532 | rxrpc_put_peer(call->peer); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 533 | kfree(call->rxtx_buffer); |
| 534 | kfree(call->rxtx_annotations); |
David Howells | dee4636 | 2016-06-27 17:11:19 +0100 | [diff] [blame] | 535 | kmem_cache_free(rxrpc_call_jar, call); |
| 536 | } |
| 537 | |
| 538 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 539 | * clean up a call |
| 540 | */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 541 | void rxrpc_cleanup_call(struct rxrpc_call *call) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 542 | { |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 543 | int i; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 544 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 545 | _net("DESTROY CALL %d", call->debug_id); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 546 | |
| 547 | memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); |
| 548 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 549 | del_timer_sync(&call->timer); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 550 | |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 551 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 552 | ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); |
David Howells | e653cfe | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 553 | ASSERTCMP(call->conn, ==, NULL); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 554 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 555 | /* Clean up the Rx/Tx buffer */ |
| 556 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) |
| 557 | rxrpc_free_skb(call->rxtx_buffer[i]); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 558 | |
| 559 | rxrpc_free_skb(call->tx_pending); |
| 560 | |
David Howells | dee4636 | 2016-06-27 17:11:19 +0100 | [diff] [blame] | 561 | call_rcu(&call->rcu, rxrpc_rcu_destroy_call); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 562 | } |
| 563 | |
| 564 | /* |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 565 | * Make sure that all calls are gone. |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 566 | */ |
| 567 | void __exit rxrpc_destroy_all_calls(void) |
| 568 | { |
| 569 | struct rxrpc_call *call; |
| 570 | |
| 571 | _enter(""); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 572 | |
| 573 | if (list_empty(&rxrpc_calls)) |
| 574 | return; |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 575 | |
| 576 | write_lock(&rxrpc_call_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 577 | |
| 578 | while (!list_empty(&rxrpc_calls)) { |
| 579 | call = list_entry(rxrpc_calls.next, struct rxrpc_call, link); |
| 580 | _debug("Zapping call %p", call); |
| 581 | |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 582 | rxrpc_see_call(call); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 583 | list_del_init(&call->link); |
| 584 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 585 | pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n", |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 586 | call, atomic_read(&call->usage), |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 587 | rxrpc_call_states[call->state], |
| 588 | call->flags, call->events); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 589 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 590 | write_unlock(&rxrpc_call_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 591 | cond_resched(); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 592 | write_lock(&rxrpc_call_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 593 | } |
| 594 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 595 | write_unlock(&rxrpc_call_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 596 | } |