^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* RxRPC individual remote procedure call handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Written by David Howells (dhowells@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/circ_buf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/spinlock_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <net/af_rxrpc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "ar-internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) [RXRPC_CALL_UNINITIALISED] = "Uninit ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) [RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) [RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) [RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) [RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) [RXRPC_CALL_SERVER_PREALLOC] = "SvPrealc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) [RXRPC_CALL_SERVER_SECURING] = "SvSecure",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) [RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) [RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) [RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) [RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) [RXRPC_CALL_COMPLETE] = "Complete",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) [RXRPC_CALL_SUCCEEDED] = "Complete",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) [RXRPC_CALL_LOCAL_ERROR] = "LocError",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) [RXRPC_CALL_NETWORK_ERROR] = "NetError",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct kmem_cache *rxrpc_call_jar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static struct semaphore rxrpc_call_limiter =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) __SEMAPHORE_INITIALIZER(rxrpc_call_limiter, 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct semaphore rxrpc_kernel_call_limiter =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) __SEMAPHORE_INITIALIZER(rxrpc_kernel_call_limiter, 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static void rxrpc_call_timer_expired(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct rxrpc_call *call = from_timer(call, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) _enter("%d", call->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (call->state < RXRPC_CALL_COMPLETE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) trace_rxrpc_timer(call, rxrpc_timer_expired, jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) __rxrpc_queue_call(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) rxrpc_put_call(call, rxrpc_call_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) void rxrpc_reduce_call_timer(struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned long expire_at,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unsigned long now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) enum rxrpc_timer_trace why)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (rxrpc_try_get_call(call, rxrpc_call_got_timer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) trace_rxrpc_timer(call, why, now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (timer_reduce(&call->timer, expire_at))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) rxrpc_put_call(call, rxrpc_call_put_notimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) void rxrpc_delete_call_timer(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (del_timer_sync(&call->timer))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) rxrpc_put_call(call, rxrpc_call_put_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static struct lock_class_key rxrpc_call_user_mutex_lock_class_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * find an extant server call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * - called in process context with IRQs enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) unsigned long user_call_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct rxrpc_call *call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct rb_node *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) _enter("%p,%lx", rx, user_call_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) read_lock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) p = rx->calls.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) while (p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) call = rb_entry(p, struct rxrpc_call, sock_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (user_call_ID < call->user_call_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) p = p->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) else if (user_call_ID > call->user_call_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) p = p->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) goto found_extant_call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) read_unlock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) _leave(" = NULL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) found_extant_call:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) rxrpc_get_call(call, rxrpc_call_got);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) read_unlock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) _leave(" = %p [%d]", call, atomic_read(&call->usage));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * allocate a new call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) unsigned int debug_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct rxrpc_call *call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) call = kmem_cache_zalloc(rxrpc_call_jar, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) call->rxtx_buffer = kcalloc(RXRPC_RXTX_BUFF_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) sizeof(struct sk_buff *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (!call->rxtx_buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) goto nomem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) call->rxtx_annotations = kcalloc(RXRPC_RXTX_BUFF_SIZE, sizeof(u8), gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (!call->rxtx_annotations)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) goto nomem_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) mutex_init(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Prevent lockdep reporting a deadlock false positive between the afs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * filesystem and sys_sendmsg() via the mmap sem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (rx->sk.sk_kern_sock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) lockdep_set_class(&call->user_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) &rxrpc_call_user_mutex_lock_class_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) INIT_WORK(&call->processor, &rxrpc_process_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) INIT_LIST_HEAD(&call->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) INIT_LIST_HEAD(&call->chan_wait_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) INIT_LIST_HEAD(&call->accept_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) INIT_LIST_HEAD(&call->recvmsg_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) INIT_LIST_HEAD(&call->sock_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) init_waitqueue_head(&call->waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) spin_lock_init(&call->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) spin_lock_init(&call->notify_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) spin_lock_init(&call->input_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) rwlock_init(&call->state_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) atomic_set(&call->usage, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) call->debug_id = debug_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) call->tx_total_len = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) call->next_rx_timo = 20 * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) call->next_req_timo = 1 * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) memset(&call->sock_node, 0xed, sizeof(call->sock_node));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* Leave space in the ring to handle a maxed-out jumbo packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) call->rx_winsize = rxrpc_rx_window_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) call->tx_winsize = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) call->rx_expect_next = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) call->cong_cwnd = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) call->cong_ssthresh = RXRPC_RXTX_BUFF_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) call->rxnet = rxnet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) call->rtt_avail = RXRPC_CALL_RTT_AVAIL_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) atomic_inc(&rxnet->nr_calls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) nomem_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) kfree(call->rxtx_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) nomem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) kmem_cache_free(rxrpc_call_jar, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * Allocate a new client call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct sockaddr_rxrpc *srx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) gfp_t gfp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) unsigned int debug_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct rxrpc_call *call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) ktime_t now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) _enter("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) call = rxrpc_alloc_call(rx, gfp, debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (!call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) call->state = RXRPC_CALL_CLIENT_AWAIT_CONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) call->service_id = srx->srx_service;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) call->tx_phase = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) now = ktime_get_real();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) call->acks_latest_ts = now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) call->cong_tstamp = now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) _leave(" = %p", call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * Initiate the call ack/resend/expiry timer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static void rxrpc_start_call_timer(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) unsigned long now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) unsigned long j = now + MAX_JIFFY_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) call->ack_at = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) call->ack_lost_at = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) call->resend_at = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) call->ping_at = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) call->expect_rx_by = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) call->expect_req_by = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) call->expect_term_by = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) call->timer.expires = now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * Wait for a call slot to become available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static struct semaphore *rxrpc_get_call_slot(struct rxrpc_call_params *p, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct semaphore *limiter = &rxrpc_call_limiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (p->kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) limiter = &rxrpc_kernel_call_limiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (p->interruptibility == RXRPC_UNINTERRUPTIBLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) down(limiter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return limiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return down_interruptible(limiter) < 0 ? NULL : limiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * Release a call slot.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static void rxrpc_put_call_slot(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct semaphore *limiter = &rxrpc_call_limiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (test_bit(RXRPC_CALL_KERNEL, &call->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) limiter = &rxrpc_kernel_call_limiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) up(limiter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * Set up a call for the given parameters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * - Called with the socket lock held, which it must release.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * - If it returns a call, the call's lock will need releasing by the caller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) struct rxrpc_conn_parameters *cp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct sockaddr_rxrpc *srx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct rxrpc_call_params *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) gfp_t gfp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned int debug_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) __releases(&rx->sk.sk_lock.slock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) __acquires(&call->user_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct rxrpc_call *call, *xcall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct rxrpc_net *rxnet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) struct semaphore *limiter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct rb_node *parent, **pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) _enter("%p,%lx", rx, p->user_call_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) limiter = rxrpc_get_call_slot(p, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (!limiter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return ERR_PTR(-ERESTARTSYS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) call = rxrpc_alloc_client_call(rx, srx, gfp, debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (IS_ERR(call)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) release_sock(&rx->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) up(limiter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) _leave(" = %ld", PTR_ERR(call));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) call->interruptibility = p->interruptibility;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) call->tx_total_len = p->tx_total_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) trace_rxrpc_call(call->debug_id, rxrpc_call_new_client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) atomic_read(&call->usage),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) here, (const void *)p->user_call_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (p->kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) __set_bit(RXRPC_CALL_KERNEL, &call->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) /* We need to protect a partially set up call against the user as we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * will be acting outside the socket lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) mutex_lock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) /* Publish the call, even though it is incompletely set up as yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) write_lock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) pp = &rx->calls.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) while (*pp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) parent = *pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) xcall = rb_entry(parent, struct rxrpc_call, sock_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (p->user_call_ID < xcall->user_call_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) pp = &(*pp)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) else if (p->user_call_ID > xcall->user_call_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) pp = &(*pp)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) goto error_dup_user_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) rcu_assign_pointer(call->socket, rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) call->user_call_ID = p->user_call_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) __set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) rxrpc_get_call(call, rxrpc_call_got_userid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) rb_link_node(&call->sock_node, parent, pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) rb_insert_color(&call->sock_node, &rx->calls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) list_add(&call->sock_link, &rx->sock_calls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) write_unlock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) rxnet = call->rxnet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) write_lock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) list_add_tail(&call->link, &rxnet->calls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) write_unlock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) /* From this point on, the call is protected by its own lock. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) release_sock(&rx->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) /* Set up or get a connection record and set the protocol parameters,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * including channel number and call ID.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) ret = rxrpc_connect_call(rx, call, cp, srx, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) goto error_attached_to_socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) trace_rxrpc_call(call->debug_id, rxrpc_call_connected,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) atomic_read(&call->usage), here, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) rxrpc_start_call_timer(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) _leave(" = %p [new]", call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) return call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) /* We unexpectedly found the user ID in the list after taking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) * the call_lock. This shouldn't happen unless the user races
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * with itself and tries to add the same user ID twice at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) * same time in different threads.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) error_dup_user_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) write_unlock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) release_sock(&rx->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) RX_CALL_DEAD, -EEXIST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) trace_rxrpc_call(call->debug_id, rxrpc_call_error,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) atomic_read(&call->usage), here, ERR_PTR(-EEXIST));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) rxrpc_release_call(rx, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) mutex_unlock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) rxrpc_put_call(call, rxrpc_call_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) _leave(" = -EEXIST");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return ERR_PTR(-EEXIST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) /* We got an error, but the call is attached to the socket and is in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * need of release. However, we might now race with recvmsg() when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * completing the call queues it. Return 0 from sys_sendmsg() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * leave the error to recvmsg() to deal with.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) error_attached_to_socket:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) trace_rxrpc_call(call->debug_id, rxrpc_call_error,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) atomic_read(&call->usage), here, ERR_PTR(ret));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) RX_CALL_DEAD, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) _leave(" = c=%08x [err]", call->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * Set up an incoming call. call->conn points to the connection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * This is called in BH context and isn't allowed to fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) void rxrpc_incoming_call(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) struct rxrpc_connection *conn = call->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) u32 chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) _enter(",%d", call->conn->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) rcu_assign_pointer(call->socket, rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) call->call_id = sp->hdr.callNumber;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) call->service_id = sp->hdr.serviceId;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) call->cid = sp->hdr.cid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) call->state = RXRPC_CALL_SERVER_SECURING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) call->cong_tstamp = skb->tstamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) /* Set the channel for this call. We don't get channel_lock as we're
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * only defending against the data_ready handler (which we're called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * from) and the RESPONSE packet parser (which is only really
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * interested in call_counter and can cope with a disagreement with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * call pointer).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) chan = sp->hdr.cid & RXRPC_CHANNELMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) conn->channels[chan].call_counter = call->call_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) conn->channels[chan].call_id = call->call_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) rcu_assign_pointer(conn->channels[chan].call, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) spin_lock(&conn->params.peer->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) hlist_add_head_rcu(&call->error_link, &conn->params.peer->error_targets);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) spin_unlock(&conn->params.peer->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) rxrpc_start_call_timer(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) _leave("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * Queue a call's work processor, getting a ref to pass to the work queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) bool rxrpc_queue_call(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) int n = atomic_fetch_add_unless(&call->usage, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (n == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (rxrpc_queue_work(&call->processor))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) trace_rxrpc_call(call->debug_id, rxrpc_call_queued, n + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) here, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) rxrpc_put_call(call, rxrpc_call_put_noqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) * Queue a call's work processor, passing the callers ref to the work queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) bool __rxrpc_queue_call(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int n = atomic_read(&call->usage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) ASSERTCMP(n, >=, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (rxrpc_queue_work(&call->processor))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) trace_rxrpc_call(call->debug_id, rxrpc_call_queued_ref, n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) here, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) rxrpc_put_call(call, rxrpc_call_put_noqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) * Note the re-emergence of a call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) void rxrpc_see_call(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (call) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) int n = atomic_read(&call->usage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) trace_rxrpc_call(call->debug_id, rxrpc_call_seen, n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) here, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) int n = atomic_fetch_add_unless(&call->usage, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (n == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) trace_rxrpc_call(call->debug_id, op, n, here, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * Note the addition of a ref on a call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) int n = atomic_inc_return(&call->usage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) trace_rxrpc_call(call->debug_id, op, n, here, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) * Clean up the RxTx skb ring.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) static void rxrpc_cleanup_ring(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) rxrpc_free_skb(call->rxtx_buffer[i], rxrpc_skb_cleaned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) call->rxtx_buffer[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * Detach a call from its owning socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) struct rxrpc_connection *conn = call->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) bool put = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) _enter("{%d,%d}", call->debug_id, atomic_read(&call->usage));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) trace_rxrpc_call(call->debug_id, rxrpc_call_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) atomic_read(&call->usage),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) here, (const void *)call->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) spin_lock_bh(&call->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) spin_unlock_bh(&call->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) rxrpc_put_call_slot(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) rxrpc_delete_call_timer(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) /* Make sure we don't get any more notifications */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) write_lock_bh(&rx->recvmsg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (!list_empty(&call->recvmsg_link)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) _debug("unlinking once-pending call %p { e=%lx f=%lx }",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) call, call->events, call->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) list_del(&call->recvmsg_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) put = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) /* list_empty() must return false in rxrpc_notify_socket() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) call->recvmsg_link.next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) call->recvmsg_link.prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) write_unlock_bh(&rx->recvmsg_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) if (put)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) rxrpc_put_call(call, rxrpc_call_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) write_lock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) rb_erase(&call->sock_node, &rx->calls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) memset(&call->sock_node, 0xdd, sizeof(call->sock_node));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) rxrpc_put_call(call, rxrpc_call_put_userid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) list_del(&call->sock_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) write_unlock(&rx->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (conn && !test_bit(RXRPC_CALL_DISCONNECTED, &call->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) rxrpc_disconnect_call(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (call->security)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) call->security->free_call_crypto(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) _leave("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) * release all the calls associated with a socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) struct rxrpc_call *call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) _enter("%p", rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) while (!list_empty(&rx->to_be_accepted)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) call = list_entry(rx->to_be_accepted.next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) struct rxrpc_call, accept_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) list_del(&call->accept_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) rxrpc_abort_call("SKR", call, 0, RX_CALL_DEAD, -ECONNRESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) rxrpc_put_call(call, rxrpc_call_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) while (!list_empty(&rx->sock_calls)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) call = list_entry(rx->sock_calls.next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct rxrpc_call, sock_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) rxrpc_get_call(call, rxrpc_call_got);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, -ECONNRESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) rxrpc_send_abort_packet(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) rxrpc_release_call(rx, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) rxrpc_put_call(call, rxrpc_call_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) _leave("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) * release a call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct rxrpc_net *rxnet = call->rxnet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) const void *here = __builtin_return_address(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) unsigned int debug_id = call->debug_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) ASSERT(call != NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) n = atomic_dec_return(&call->usage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) trace_rxrpc_call(debug_id, op, n, here, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) ASSERTCMP(n, >=, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) if (n == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) _debug("call %d dead", call->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (!list_empty(&call->link)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) write_lock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) list_del_init(&call->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) write_unlock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) rxrpc_cleanup_call(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) * Final call destruction - but must be done in process context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) static void rxrpc_destroy_call(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) struct rxrpc_call *call = container_of(work, struct rxrpc_call, processor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) struct rxrpc_net *rxnet = call->rxnet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) rxrpc_delete_call_timer(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) rxrpc_put_connection(call->conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) rxrpc_put_peer(call->peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) kfree(call->rxtx_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) kfree(call->rxtx_annotations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) kmem_cache_free(rxrpc_call_jar, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (atomic_dec_and_test(&rxnet->nr_calls))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) wake_up_var(&rxnet->nr_calls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) * Final call destruction under RCU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) static void rxrpc_rcu_destroy_call(struct rcu_head *rcu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (in_softirq()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) INIT_WORK(&call->processor, rxrpc_destroy_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (!rxrpc_queue_work(&call->processor))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) rxrpc_destroy_call(&call->processor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) * clean up a call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) void rxrpc_cleanup_call(struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) _net("DESTROY CALL %d", call->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) memset(&call->sock_node, 0xcd, sizeof(call->sock_node));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) rxrpc_cleanup_ring(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) rxrpc_free_skb(call->tx_pending, rxrpc_skb_cleaned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) call_rcu(&call->rcu, rxrpc_rcu_destroy_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) * Make sure that all calls are gone from a network namespace. To reach this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) * point, any open UDP sockets in that namespace must have been closed, so any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) * outstanding calls cannot be doing I/O.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) void rxrpc_destroy_all_calls(struct rxrpc_net *rxnet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) struct rxrpc_call *call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) _enter("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) if (!list_empty(&rxnet->calls)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) write_lock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) while (!list_empty(&rxnet->calls)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) call = list_entry(rxnet->calls.next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) struct rxrpc_call, link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) _debug("Zapping call %p", call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) rxrpc_see_call(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) list_del_init(&call->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) call, atomic_read(&call->usage),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) rxrpc_call_states[call->state],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) call->flags, call->events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) write_unlock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) write_lock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) write_unlock(&rxnet->call_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) atomic_dec(&rxnet->nr_calls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) wait_var_event(&rxnet->nr_calls, !atomic_read(&rxnet->nr_calls));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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