cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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misc.c (2370B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/* Miscellaneous bits
      3 *
      4 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
      5 * Written by David Howells (dhowells@redhat.com)
      6 */
      7
      8#include <linux/kernel.h>
      9#include <net/sock.h>
     10#include <net/af_rxrpc.h>
     11#include "ar-internal.h"
     12
     13/*
     14 * The maximum listening backlog queue size that may be set on a socket by
     15 * listen().
     16 */
     17unsigned int rxrpc_max_backlog __read_mostly = 10;
     18
     19/*
     20 * How long to wait before scheduling ACK generation after seeing a
     21 * packet with RXRPC_REQUEST_ACK set (in jiffies).
     22 */
     23unsigned long rxrpc_requested_ack_delay = 1;
     24
     25/*
     26 * How long to wait before scheduling an ACK with subtype DELAY (in jiffies).
     27 *
     28 * We use this when we've received new data packets.  If those packets aren't
     29 * all consumed within this time we will send a DELAY ACK if an ACK was not
     30 * requested to let the sender know it doesn't need to resend.
     31 */
     32unsigned long rxrpc_soft_ack_delay = HZ;
     33
     34/*
     35 * How long to wait before scheduling an ACK with subtype IDLE (in jiffies).
     36 *
     37 * We use this when we've consumed some previously soft-ACK'd packets when
     38 * further packets aren't immediately received to decide when to send an IDLE
     39 * ACK let the other end know that it can free up its Tx buffer space.
     40 */
     41unsigned long rxrpc_idle_ack_delay = HZ / 2;
     42
     43/*
     44 * Receive window size in packets.  This indicates the maximum number of
     45 * unconsumed received packets we're willing to retain in memory.  Once this
     46 * limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further
     47 * packets.
     48 */
     49unsigned int rxrpc_rx_window_size = RXRPC_INIT_RX_WINDOW_SIZE;
     50#if (RXRPC_RXTX_BUFF_SIZE - 1) < RXRPC_INIT_RX_WINDOW_SIZE
     51#error Need to reduce RXRPC_INIT_RX_WINDOW_SIZE
     52#endif
     53
     54/*
     55 * Maximum Rx MTU size.  This indicates to the sender the size of jumbo packet
     56 * made by gluing normal packets together that we're willing to handle.
     57 */
     58unsigned int rxrpc_rx_mtu = 5692;
     59
     60/*
     61 * The maximum number of fragments in a received jumbo packet that we tell the
     62 * sender that we're willing to handle.
     63 */
     64unsigned int rxrpc_rx_jumbo_max = 4;
     65
     66const s8 rxrpc_ack_priority[] = {
     67	[0]				= 0,
     68	[RXRPC_ACK_DELAY]		= 1,
     69	[RXRPC_ACK_REQUESTED]		= 2,
     70	[RXRPC_ACK_IDLE]		= 3,
     71	[RXRPC_ACK_DUPLICATE]		= 4,
     72	[RXRPC_ACK_OUT_OF_SEQUENCE]	= 5,
     73	[RXRPC_ACK_EXCEEDS_WINDOW]	= 6,
     74	[RXRPC_ACK_NOSPACE]		= 7,
     75	[RXRPC_ACK_PING_RESPONSE]	= 8,
     76};