v4.19.13 snapshot.
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
new file mode 100644
index 0000000..8f1a8f8
--- /dev/null
+++ b/net/rxrpc/call_object.c
@@ -0,0 +1,730 @@
+/* RxRPC individual remote procedure call handling
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/circ_buf.h>
+#include <linux/spinlock_types.h>
+#include <net/sock.h>
+#include <net/af_rxrpc.h>
+#include "ar-internal.h"
+
+const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = {
+ [RXRPC_CALL_UNINITIALISED] = "Uninit ",
+ [RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn",
+ [RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq",
+ [RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl",
+ [RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl",
+ [RXRPC_CALL_SERVER_PREALLOC] = "SvPrealc",
+ [RXRPC_CALL_SERVER_SECURING] = "SvSecure",
+ [RXRPC_CALL_SERVER_ACCEPTING] = "SvAccept",
+ [RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq",
+ [RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq",
+ [RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl",
+ [RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK",
+ [RXRPC_CALL_COMPLETE] = "Complete",
+};
+
+const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = {
+ [RXRPC_CALL_SUCCEEDED] = "Complete",
+ [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort",
+ [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort",
+ [RXRPC_CALL_LOCAL_ERROR] = "LocError",
+ [RXRPC_CALL_NETWORK_ERROR] = "NetError",
+};
+
+struct kmem_cache *rxrpc_call_jar;
+
+static void rxrpc_call_timer_expired(struct timer_list *t)
+{
+ struct rxrpc_call *call = from_timer(call, t, timer);
+
+ _enter("%d", call->debug_id);
+
+ if (call->state < RXRPC_CALL_COMPLETE) {
+ trace_rxrpc_timer(call, rxrpc_timer_expired, jiffies);
+ rxrpc_queue_call(call);
+ }
+}
+
+static struct lock_class_key rxrpc_call_user_mutex_lock_class_key;
+
+/*
+ * find an extant server call
+ * - called in process context with IRQs enabled
+ */
+struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx,
+ unsigned long user_call_ID)
+{
+ struct rxrpc_call *call;
+ struct rb_node *p;
+
+ _enter("%p,%lx", rx, user_call_ID);
+
+ read_lock(&rx->call_lock);
+
+ p = rx->calls.rb_node;
+ while (p) {
+ call = rb_entry(p, struct rxrpc_call, sock_node);
+
+ if (user_call_ID < call->user_call_ID)
+ p = p->rb_left;
+ else if (user_call_ID > call->user_call_ID)
+ p = p->rb_right;
+ else
+ goto found_extant_call;
+ }
+
+ read_unlock(&rx->call_lock);
+ _leave(" = NULL");
+ return NULL;
+
+found_extant_call:
+ rxrpc_get_call(call, rxrpc_call_got);
+ read_unlock(&rx->call_lock);
+ _leave(" = %p [%d]", call, atomic_read(&call->usage));
+ return call;
+}
+
+/*
+ * allocate a new call
+ */
+struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
+ unsigned int debug_id)
+{
+ struct rxrpc_call *call;
+ struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
+
+ call = kmem_cache_zalloc(rxrpc_call_jar, gfp);
+ if (!call)
+ return NULL;
+
+ call->rxtx_buffer = kcalloc(RXRPC_RXTX_BUFF_SIZE,
+ sizeof(struct sk_buff *),
+ gfp);
+ if (!call->rxtx_buffer)
+ goto nomem;
+
+ call->rxtx_annotations = kcalloc(RXRPC_RXTX_BUFF_SIZE, sizeof(u8), gfp);
+ if (!call->rxtx_annotations)
+ goto nomem_2;
+
+ mutex_init(&call->user_mutex);
+
+ /* Prevent lockdep reporting a deadlock false positive between the afs
+ * filesystem and sys_sendmsg() via the mmap sem.
+ */
+ if (rx->sk.sk_kern_sock)
+ lockdep_set_class(&call->user_mutex,
+ &rxrpc_call_user_mutex_lock_class_key);
+
+ timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
+ INIT_WORK(&call->processor, &rxrpc_process_call);
+ INIT_LIST_HEAD(&call->link);
+ INIT_LIST_HEAD(&call->chan_wait_link);
+ INIT_LIST_HEAD(&call->accept_link);
+ INIT_LIST_HEAD(&call->recvmsg_link);
+ INIT_LIST_HEAD(&call->sock_link);
+ init_waitqueue_head(&call->waitq);
+ spin_lock_init(&call->lock);
+ spin_lock_init(&call->notify_lock);
+ spin_lock_init(&call->input_lock);
+ rwlock_init(&call->state_lock);
+ atomic_set(&call->usage, 1);
+ call->debug_id = debug_id;
+ call->tx_total_len = -1;
+ call->next_rx_timo = 20 * HZ;
+ call->next_req_timo = 1 * HZ;
+
+ memset(&call->sock_node, 0xed, sizeof(call->sock_node));
+
+ /* Leave space in the ring to handle a maxed-out jumbo packet */
+ call->rx_winsize = rxrpc_rx_window_size;
+ call->tx_winsize = 16;
+ call->rx_expect_next = 1;
+
+ call->cong_cwnd = 2;
+ call->cong_ssthresh = RXRPC_RXTX_BUFF_SIZE - 1;
+
+ call->rxnet = rxnet;
+ atomic_inc(&rxnet->nr_calls);
+ return call;
+
+nomem_2:
+ kfree(call->rxtx_buffer);
+nomem:
+ kmem_cache_free(rxrpc_call_jar, call);
+ return NULL;
+}
+
+/*
+ * Allocate a new client call.
+ */
+static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx,
+ struct sockaddr_rxrpc *srx,
+ gfp_t gfp,
+ unsigned int debug_id)
+{
+ struct rxrpc_call *call;
+ ktime_t now;
+
+ _enter("");
+
+ call = rxrpc_alloc_call(rx, gfp, debug_id);
+ if (!call)
+ return ERR_PTR(-ENOMEM);
+ call->state = RXRPC_CALL_CLIENT_AWAIT_CONN;
+ call->service_id = srx->srx_service;
+ call->tx_phase = true;
+ now = ktime_get_real();
+ call->acks_latest_ts = now;
+ call->cong_tstamp = now;
+
+ _leave(" = %p", call);
+ return call;
+}
+
+/*
+ * Initiate the call ack/resend/expiry timer.
+ */
+static void rxrpc_start_call_timer(struct rxrpc_call *call)
+{
+ unsigned long now = jiffies;
+ unsigned long j = now + MAX_JIFFY_OFFSET;
+
+ call->ack_at = j;
+ call->ack_lost_at = j;
+ call->resend_at = j;
+ call->ping_at = j;
+ call->expect_rx_by = j;
+ call->expect_req_by = j;
+ call->expect_term_by = j;
+ call->timer.expires = now;
+}
+
+/*
+ * Set up a call for the given parameters.
+ * - Called with the socket lock held, which it must release.
+ * - If it returns a call, the call's lock will need releasing by the caller.
+ */
+struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
+ struct rxrpc_conn_parameters *cp,
+ struct sockaddr_rxrpc *srx,
+ struct rxrpc_call_params *p,
+ gfp_t gfp,
+ unsigned int debug_id)
+ __releases(&rx->sk.sk_lock.slock)
+ __acquires(&call->user_mutex)
+{
+ struct rxrpc_call *call, *xcall;
+ struct rxrpc_net *rxnet;
+ struct rb_node *parent, **pp;
+ const void *here = __builtin_return_address(0);
+ int ret;
+
+ _enter("%p,%lx", rx, p->user_call_ID);
+
+ call = rxrpc_alloc_client_call(rx, srx, gfp, debug_id);
+ if (IS_ERR(call)) {
+ release_sock(&rx->sk);
+ _leave(" = %ld", PTR_ERR(call));
+ return call;
+ }
+
+ call->tx_total_len = p->tx_total_len;
+ trace_rxrpc_call(call, rxrpc_call_new_client, atomic_read(&call->usage),
+ here, (const void *)p->user_call_ID);
+
+ /* We need to protect a partially set up call against the user as we
+ * will be acting outside the socket lock.
+ */
+ mutex_lock(&call->user_mutex);
+
+ /* Publish the call, even though it is incompletely set up as yet */
+ write_lock(&rx->call_lock);
+
+ pp = &rx->calls.rb_node;
+ parent = NULL;
+ while (*pp) {
+ parent = *pp;
+ xcall = rb_entry(parent, struct rxrpc_call, sock_node);
+
+ if (p->user_call_ID < xcall->user_call_ID)
+ pp = &(*pp)->rb_left;
+ else if (p->user_call_ID > xcall->user_call_ID)
+ pp = &(*pp)->rb_right;
+ else
+ goto error_dup_user_ID;
+ }
+
+ rcu_assign_pointer(call->socket, rx);
+ call->user_call_ID = p->user_call_ID;
+ __set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
+ rxrpc_get_call(call, rxrpc_call_got_userid);
+ rb_link_node(&call->sock_node, parent, pp);
+ rb_insert_color(&call->sock_node, &rx->calls);
+ list_add(&call->sock_link, &rx->sock_calls);
+
+ write_unlock(&rx->call_lock);
+
+ rxnet = call->rxnet;
+ write_lock(&rxnet->call_lock);
+ list_add_tail(&call->link, &rxnet->calls);
+ write_unlock(&rxnet->call_lock);
+
+ /* From this point on, the call is protected by its own lock. */
+ release_sock(&rx->sk);
+
+ /* Set up or get a connection record and set the protocol parameters,
+ * including channel number and call ID.
+ */
+ ret = rxrpc_connect_call(rx, call, cp, srx, gfp);
+ if (ret < 0)
+ goto error;
+
+ trace_rxrpc_call(call, rxrpc_call_connected, atomic_read(&call->usage),
+ here, NULL);
+
+ rxrpc_start_call_timer(call);
+
+ _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id);
+
+ _leave(" = %p [new]", call);
+ return call;
+
+ /* We unexpectedly found the user ID in the list after taking
+ * the call_lock. This shouldn't happen unless the user races
+ * with itself and tries to add the same user ID twice at the
+ * same time in different threads.
+ */
+error_dup_user_ID:
+ write_unlock(&rx->call_lock);
+ release_sock(&rx->sk);
+ ret = -EEXIST;
+
+error:
+ __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR,
+ RX_CALL_DEAD, ret);
+ trace_rxrpc_call(call, rxrpc_call_error, atomic_read(&call->usage),
+ here, ERR_PTR(ret));
+ rxrpc_release_call(rx, call);
+ mutex_unlock(&call->user_mutex);
+ rxrpc_put_call(call, rxrpc_call_put);
+ _leave(" = %d", ret);
+ return ERR_PTR(ret);
+}
+
+/*
+ * Retry a call to a new address. It is expected that the Tx queue of the call
+ * will contain data previously packaged for an old call.
+ */
+int rxrpc_retry_client_call(struct rxrpc_sock *rx,
+ struct rxrpc_call *call,
+ struct rxrpc_conn_parameters *cp,
+ struct sockaddr_rxrpc *srx,
+ gfp_t gfp)
+{
+ const void *here = __builtin_return_address(0);
+ int ret;
+
+ /* Set up or get a connection record and set the protocol parameters,
+ * including channel number and call ID.
+ */
+ ret = rxrpc_connect_call(rx, call, cp, srx, gfp);
+ if (ret < 0)
+ goto error;
+
+ trace_rxrpc_call(call, rxrpc_call_connected, atomic_read(&call->usage),
+ here, NULL);
+
+ rxrpc_start_call_timer(call);
+
+ _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id);
+
+ if (!test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
+ rxrpc_queue_call(call);
+
+ _leave(" = 0");
+ return 0;
+
+error:
+ rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR,
+ RX_CALL_DEAD, ret);
+ trace_rxrpc_call(call, rxrpc_call_error, atomic_read(&call->usage),
+ here, ERR_PTR(ret));
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * Set up an incoming call. call->conn points to the connection.
+ * This is called in BH context and isn't allowed to fail.
+ */
+void rxrpc_incoming_call(struct rxrpc_sock *rx,
+ struct rxrpc_call *call,
+ struct sk_buff *skb)
+{
+ struct rxrpc_connection *conn = call->conn;
+ struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
+ u32 chan;
+
+ _enter(",%d", call->conn->debug_id);
+
+ rcu_assign_pointer(call->socket, rx);
+ call->call_id = sp->hdr.callNumber;
+ call->service_id = sp->hdr.serviceId;
+ call->cid = sp->hdr.cid;
+ call->state = RXRPC_CALL_SERVER_ACCEPTING;
+ if (sp->hdr.securityIndex > 0)
+ call->state = RXRPC_CALL_SERVER_SECURING;
+ call->cong_tstamp = skb->tstamp;
+
+ /* Set the channel for this call. We don't get channel_lock as we're
+ * only defending against the data_ready handler (which we're called
+ * from) and the RESPONSE packet parser (which is only really
+ * interested in call_counter and can cope with a disagreement with the
+ * call pointer).
+ */
+ chan = sp->hdr.cid & RXRPC_CHANNELMASK;
+ conn->channels[chan].call_counter = call->call_id;
+ conn->channels[chan].call_id = call->call_id;
+ rcu_assign_pointer(conn->channels[chan].call, call);
+
+ spin_lock(&conn->params.peer->lock);
+ hlist_add_head_rcu(&call->error_link, &conn->params.peer->error_targets);
+ spin_unlock(&conn->params.peer->lock);
+
+ _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id);
+
+ rxrpc_start_call_timer(call);
+ _leave("");
+}
+
+/*
+ * Queue a call's work processor, getting a ref to pass to the work queue.
+ */
+bool rxrpc_queue_call(struct rxrpc_call *call)
+{
+ const void *here = __builtin_return_address(0);
+ int n = atomic_fetch_add_unless(&call->usage, 1, 0);
+ if (n == 0)
+ return false;
+ if (rxrpc_queue_work(&call->processor))
+ trace_rxrpc_call(call, rxrpc_call_queued, n + 1, here, NULL);
+ else
+ rxrpc_put_call(call, rxrpc_call_put_noqueue);
+ return true;
+}
+
+/*
+ * Queue a call's work processor, passing the callers ref to the work queue.
+ */
+bool __rxrpc_queue_call(struct rxrpc_call *call)
+{
+ const void *here = __builtin_return_address(0);
+ int n = atomic_read(&call->usage);
+ ASSERTCMP(n, >=, 1);
+ if (rxrpc_queue_work(&call->processor))
+ trace_rxrpc_call(call, rxrpc_call_queued_ref, n, here, NULL);
+ else
+ rxrpc_put_call(call, rxrpc_call_put_noqueue);
+ return true;
+}
+
+/*
+ * Note the re-emergence of a call.
+ */
+void rxrpc_see_call(struct rxrpc_call *call)
+{
+ const void *here = __builtin_return_address(0);
+ if (call) {
+ int n = atomic_read(&call->usage);
+
+ trace_rxrpc_call(call, rxrpc_call_seen, n, here, NULL);
+ }
+}
+
+/*
+ * Note the addition of a ref on a call.
+ */
+void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
+{
+ const void *here = __builtin_return_address(0);
+ int n = atomic_inc_return(&call->usage);
+
+ trace_rxrpc_call(call, op, n, here, NULL);
+}
+
+/*
+ * Detach a call from its owning socket.
+ */
+void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
+{
+ const void *here = __builtin_return_address(0);
+ struct rxrpc_connection *conn = call->conn;
+ bool put = false;
+ int i;
+
+ _enter("{%d,%d}", call->debug_id, atomic_read(&call->usage));
+
+ trace_rxrpc_call(call, rxrpc_call_release, atomic_read(&call->usage),
+ here, (const void *)call->flags);
+
+ ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
+
+ spin_lock_bh(&call->lock);
+ if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
+ BUG();
+ spin_unlock_bh(&call->lock);
+
+ del_timer_sync(&call->timer);
+
+ /* Make sure we don't get any more notifications */
+ write_lock_bh(&rx->recvmsg_lock);
+
+ if (!list_empty(&call->recvmsg_link)) {
+ _debug("unlinking once-pending call %p { e=%lx f=%lx }",
+ call, call->events, call->flags);
+ list_del(&call->recvmsg_link);
+ put = true;
+ }
+
+ /* list_empty() must return false in rxrpc_notify_socket() */
+ call->recvmsg_link.next = NULL;
+ call->recvmsg_link.prev = NULL;
+
+ write_unlock_bh(&rx->recvmsg_lock);
+ if (put)
+ rxrpc_put_call(call, rxrpc_call_put);
+
+ write_lock(&rx->call_lock);
+
+ if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
+ rb_erase(&call->sock_node, &rx->calls);
+ memset(&call->sock_node, 0xdd, sizeof(call->sock_node));
+ rxrpc_put_call(call, rxrpc_call_put_userid);
+ }
+
+ list_del(&call->sock_link);
+ write_unlock(&rx->call_lock);
+
+ _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
+
+ if (conn)
+ rxrpc_disconnect_call(call);
+
+ for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) {
+ rxrpc_free_skb(call->rxtx_buffer[i],
+ (call->tx_phase ? rxrpc_skb_tx_cleaned :
+ rxrpc_skb_rx_cleaned));
+ call->rxtx_buffer[i] = NULL;
+ }
+
+ _leave("");
+}
+
+/*
+ * Prepare a kernel service call for retry.
+ */
+int rxrpc_prepare_call_for_retry(struct rxrpc_sock *rx, struct rxrpc_call *call)
+{
+ const void *here = __builtin_return_address(0);
+ int i;
+ u8 last = 0;
+
+ _enter("{%d,%d}", call->debug_id, atomic_read(&call->usage));
+
+ trace_rxrpc_call(call, rxrpc_call_release, atomic_read(&call->usage),
+ here, (const void *)call->flags);
+
+ ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
+ ASSERTCMP(call->completion, !=, RXRPC_CALL_REMOTELY_ABORTED);
+ ASSERTCMP(call->completion, !=, RXRPC_CALL_LOCALLY_ABORTED);
+ ASSERT(list_empty(&call->recvmsg_link));
+
+ del_timer_sync(&call->timer);
+
+ _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, call->conn);
+
+ if (call->conn)
+ rxrpc_disconnect_call(call);
+
+ if (rxrpc_is_service_call(call) ||
+ !call->tx_phase ||
+ call->tx_hard_ack != 0 ||
+ call->rx_hard_ack != 0 ||
+ call->rx_top != 0)
+ return -EINVAL;
+
+ call->state = RXRPC_CALL_UNINITIALISED;
+ call->completion = RXRPC_CALL_SUCCEEDED;
+ call->call_id = 0;
+ call->cid = 0;
+ call->cong_cwnd = 0;
+ call->cong_extra = 0;
+ call->cong_ssthresh = 0;
+ call->cong_mode = 0;
+ call->cong_dup_acks = 0;
+ call->cong_cumul_acks = 0;
+ call->acks_lowest_nak = 0;
+
+ for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) {
+ last |= call->rxtx_annotations[i];
+ call->rxtx_annotations[i] &= RXRPC_TX_ANNO_LAST;
+ call->rxtx_annotations[i] |= RXRPC_TX_ANNO_RETRANS;
+ }
+
+ _leave(" = 0");
+ return 0;
+}
+
+/*
+ * release all the calls associated with a socket
+ */
+void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
+{
+ struct rxrpc_call *call;
+
+ _enter("%p", rx);
+
+ while (!list_empty(&rx->to_be_accepted)) {
+ call = list_entry(rx->to_be_accepted.next,
+ struct rxrpc_call, accept_link);
+ list_del(&call->accept_link);
+ rxrpc_abort_call("SKR", call, 0, RX_CALL_DEAD, -ECONNRESET);
+ rxrpc_put_call(call, rxrpc_call_put);
+ }
+
+ while (!list_empty(&rx->sock_calls)) {
+ call = list_entry(rx->sock_calls.next,
+ struct rxrpc_call, sock_link);
+ rxrpc_get_call(call, rxrpc_call_got);
+ rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, -ECONNRESET);
+ rxrpc_send_abort_packet(call);
+ rxrpc_release_call(rx, call);
+ rxrpc_put_call(call, rxrpc_call_put);
+ }
+
+ _leave("");
+}
+
+/*
+ * release a call
+ */
+void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
+{
+ struct rxrpc_net *rxnet = call->rxnet;
+ const void *here = __builtin_return_address(0);
+ int n;
+
+ ASSERT(call != NULL);
+
+ n = atomic_dec_return(&call->usage);
+ trace_rxrpc_call(call, op, n, here, NULL);
+ ASSERTCMP(n, >=, 0);
+ if (n == 0) {
+ _debug("call %d dead", call->debug_id);
+ ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
+
+ if (!list_empty(&call->link)) {
+ write_lock(&rxnet->call_lock);
+ list_del_init(&call->link);
+ write_unlock(&rxnet->call_lock);
+ }
+
+ rxrpc_cleanup_call(call);
+ }
+}
+
+/*
+ * Final call destruction under RCU.
+ */
+static void rxrpc_rcu_destroy_call(struct rcu_head *rcu)
+{
+ struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu);
+ struct rxrpc_net *rxnet = call->rxnet;
+
+ rxrpc_put_peer(call->peer);
+ kfree(call->rxtx_buffer);
+ kfree(call->rxtx_annotations);
+ kmem_cache_free(rxrpc_call_jar, call);
+ if (atomic_dec_and_test(&rxnet->nr_calls))
+ wake_up_var(&rxnet->nr_calls);
+}
+
+/*
+ * clean up a call
+ */
+void rxrpc_cleanup_call(struct rxrpc_call *call)
+{
+ int i;
+
+ _net("DESTROY CALL %d", call->debug_id);
+
+ memset(&call->sock_node, 0xcd, sizeof(call->sock_node));
+
+ del_timer_sync(&call->timer);
+
+ ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
+ ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags));
+ ASSERTCMP(call->conn, ==, NULL);
+
+ /* Clean up the Rx/Tx buffer */
+ for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++)
+ rxrpc_free_skb(call->rxtx_buffer[i],
+ (call->tx_phase ? rxrpc_skb_tx_cleaned :
+ rxrpc_skb_rx_cleaned));
+
+ rxrpc_free_skb(call->tx_pending, rxrpc_skb_tx_cleaned);
+
+ call_rcu(&call->rcu, rxrpc_rcu_destroy_call);
+}
+
+/*
+ * Make sure that all calls are gone from a network namespace. To reach this
+ * point, any open UDP sockets in that namespace must have been closed, so any
+ * outstanding calls cannot be doing I/O.
+ */
+void rxrpc_destroy_all_calls(struct rxrpc_net *rxnet)
+{
+ struct rxrpc_call *call;
+
+ _enter("");
+
+ if (list_empty(&rxnet->calls))
+ return;
+
+ write_lock(&rxnet->call_lock);
+
+ while (!list_empty(&rxnet->calls)) {
+ call = list_entry(rxnet->calls.next, struct rxrpc_call, link);
+ _debug("Zapping call %p", call);
+
+ rxrpc_see_call(call);
+ list_del_init(&call->link);
+
+ pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n",
+ call, atomic_read(&call->usage),
+ rxrpc_call_states[call->state],
+ call->flags, call->events);
+
+ write_unlock(&rxnet->call_lock);
+ cond_resched();
+ write_lock(&rxnet->call_lock);
+ }
+
+ write_unlock(&rxnet->call_lock);
+
+ atomic_dec(&rxnet->nr_calls);
+ wait_var_event(&rxnet->nr_calls, !atomic_read(&rxnet->nr_calls));
+}