From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/net/rxrpc/peer_object.c | 70 ++++++++++++++++++++--------------
1 files changed, 41 insertions(+), 29 deletions(-)
diff --git a/kernel/net/rxrpc/peer_object.c b/kernel/net/rxrpc/peer_object.c
index d0a1ebe..26d2ae9 100644
--- a/kernel/net/rxrpc/peer_object.c
+++ b/kernel/net/rxrpc/peer_object.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* RxRPC remote transport endpoint record management
*
* Copyright (C) 2007, 2016 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
@@ -125,7 +121,7 @@
hash_for_each_possible_rcu(rxnet->peer_hash, peer, hash_link, hash_key) {
if (rxrpc_peer_cmp_key(peer, local, srx, hash_key) == 0 &&
- atomic_read(&peer->usage) > 0)
+ refcount_read(&peer->ref) > 0)
return peer;
}
@@ -144,7 +140,7 @@
peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key);
if (peer) {
_net("PEER %d {%pISp}", peer->debug_id, &peer->srx.transport);
- _leave(" = %p {u=%d}", peer, atomic_read(&peer->usage));
+ _leave(" = %p {u=%d}", peer, refcount_read(&peer->ref));
}
return peer;
}
@@ -213,13 +209,14 @@
*/
struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp)
{
+ const void *here = __builtin_return_address(0);
struct rxrpc_peer *peer;
_enter("");
peer = kzalloc(sizeof(struct rxrpc_peer), gfp);
if (peer) {
- atomic_set(&peer->usage, 1);
+ refcount_set(&peer->ref, 1);
peer->local = rxrpc_get_local(local);
INIT_HLIST_HEAD(&peer->error_targets);
peer->service_conns = RB_ROOT;
@@ -228,12 +225,15 @@
spin_lock_init(&peer->rtt_input_lock);
peer->debug_id = atomic_inc_return(&rxrpc_debug_id);
+ rxrpc_peer_init_rtt(peer);
+
if (RXRPC_TX_SMSS > 2190)
peer->cong_cwnd = 2;
else if (RXRPC_TX_SMSS > 1095)
peer->cong_cwnd = 3;
else
peer->cong_cwnd = 4;
+ trace_rxrpc_peer(peer->debug_id, rxrpc_peer_new, 1, here);
}
_leave(" = %p", peer);
@@ -378,7 +378,7 @@
_net("PEER %d {%pISp}", peer->debug_id, &peer->srx.transport);
- _leave(" = %p {u=%d}", peer, atomic_read(&peer->usage));
+ _leave(" = %p {u=%d}", peer, refcount_read(&peer->ref));
return peer;
}
@@ -388,10 +388,10 @@
struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
{
const void *here = __builtin_return_address(0);
- int n;
+ int r;
- n = atomic_inc_return(&peer->usage);
- trace_rxrpc_peer(peer->debug_id, rxrpc_peer_got, n, here);
+ __refcount_inc(&peer->ref, &r);
+ trace_rxrpc_peer(peer->debug_id, rxrpc_peer_got, r + 1, here);
return peer;
}
@@ -401,11 +401,11 @@
struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
{
const void *here = __builtin_return_address(0);
+ int r;
if (peer) {
- int n = atomic_fetch_add_unless(&peer->usage, 1, 0);
- if (n > 0)
- trace_rxrpc_peer(peer->debug_id, rxrpc_peer_got, n + 1, here);
+ if (__refcount_inc_not_zero(&peer->ref, &r))
+ trace_rxrpc_peer(peer->debug_id, rxrpc_peer_got, r + 1, here);
else
peer = NULL;
}
@@ -436,13 +436,14 @@
{
const void *here = __builtin_return_address(0);
unsigned int debug_id;
- int n;
+ bool dead;
+ int r;
if (peer) {
debug_id = peer->debug_id;
- n = atomic_dec_return(&peer->usage);
- trace_rxrpc_peer(debug_id, rxrpc_peer_put, n, here);
- if (n == 0)
+ dead = __refcount_dec_and_test(&peer->ref, &r);
+ trace_rxrpc_peer(debug_id, rxrpc_peer_put, r - 1, here);
+ if (dead)
__rxrpc_put_peer(peer);
}
}
@@ -455,11 +456,12 @@
{
const void *here = __builtin_return_address(0);
unsigned int debug_id = peer->debug_id;
- int n;
+ bool dead;
+ int r;
- n = atomic_dec_return(&peer->usage);
- trace_rxrpc_peer(debug_id, rxrpc_peer_put, n, here);
- if (n == 0) {
+ dead = __refcount_dec_and_test(&peer->ref, &r);
+ trace_rxrpc_peer(debug_id, rxrpc_peer_put, r - 1, here);
+ if (dead) {
hash_del_rcu(&peer->hash_link);
list_del_init(&peer->keepalive_link);
rxrpc_free_peer(peer);
@@ -481,7 +483,7 @@
hlist_for_each_entry(peer, &rxnet->peer_hash[i], hash_link) {
pr_err("Leaked peer %u {%u} %pISp\n",
peer->debug_id,
- atomic_read(&peer->usage),
+ refcount_read(&peer->ref),
&peer->srx.transport);
}
}
@@ -503,14 +505,24 @@
EXPORT_SYMBOL(rxrpc_kernel_get_peer);
/**
- * rxrpc_kernel_get_rtt - Get a call's peer RTT
+ * rxrpc_kernel_get_srtt - Get a call's peer smoothed RTT
* @sock: The socket on which the call is in progress.
* @call: The call to query
+ * @_srtt: Where to store the SRTT value.
*
- * Get the call's peer RTT.
+ * Get the call's peer smoothed RTT in uS.
*/
-u64 rxrpc_kernel_get_rtt(struct socket *sock, struct rxrpc_call *call)
+bool rxrpc_kernel_get_srtt(struct socket *sock, struct rxrpc_call *call,
+ u32 *_srtt)
{
- return call->peer->rtt;
+ struct rxrpc_peer *peer = call->peer;
+
+ if (peer->rtt_count == 0) {
+ *_srtt = 1000000; /* 1S */
+ return false;
+ }
+
+ *_srtt = call->peer->srtt_us >> 3;
+ return true;
}
-EXPORT_SYMBOL(rxrpc_kernel_get_rtt);
+EXPORT_SYMBOL(rxrpc_kernel_get_srtt);
--
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