iwlwifi: mvm: use LIST_HEAD() macro
[linux-2.6/btrfs-unstable.git] / net / rxrpc / misc.c
blob8b910780f1acf5d616b0e9004a8cc9bfd2487381
1 /* Miscellaneous bits
3 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
12 #include <linux/kernel.h>
13 #include <net/sock.h>
14 #include <net/af_rxrpc.h>
15 #include "ar-internal.h"
18 * The maximum listening backlog queue size that may be set on a socket by
19 * listen().
21 unsigned int rxrpc_max_backlog __read_mostly = 10;
24 * How long to wait before scheduling ACK generation after seeing a
25 * packet with RXRPC_REQUEST_ACK set (in jiffies).
27 unsigned int rxrpc_requested_ack_delay = 1;
30 * How long to wait before scheduling an ACK with subtype DELAY (in jiffies).
32 * We use this when we've received new data packets. If those packets aren't
33 * all consumed within this time we will send a DELAY ACK if an ACK was not
34 * requested to let the sender know it doesn't need to resend.
36 unsigned int rxrpc_soft_ack_delay = 1 * HZ;
39 * How long to wait before scheduling an ACK with subtype IDLE (in jiffies).
41 * We use this when we've consumed some previously soft-ACK'd packets when
42 * further packets aren't immediately received to decide when to send an IDLE
43 * ACK let the other end know that it can free up its Tx buffer space.
45 unsigned int rxrpc_idle_ack_delay = 0.5 * HZ;
48 * Receive window size in packets. This indicates the maximum number of
49 * unconsumed received packets we're willing to retain in memory. Once this
50 * limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further
51 * packets.
53 unsigned int rxrpc_rx_window_size = RXRPC_INIT_RX_WINDOW_SIZE;
54 #if (RXRPC_RXTX_BUFF_SIZE - 1) < RXRPC_INIT_RX_WINDOW_SIZE
55 #error Need to reduce RXRPC_INIT_RX_WINDOW_SIZE
56 #endif
59 * Maximum Rx MTU size. This indicates to the sender the size of jumbo packet
60 * made by gluing normal packets together that we're willing to handle.
62 unsigned int rxrpc_rx_mtu = 5692;
65 * The maximum number of fragments in a received jumbo packet that we tell the
66 * sender that we're willing to handle.
68 unsigned int rxrpc_rx_jumbo_max = 4;
71 * Time till packet resend (in jiffies).
73 unsigned int rxrpc_resend_timeout = 4 * HZ;
75 const char *const rxrpc_pkts[] = {
76 "?00",
77 "DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG",
78 "?09", "?10", "?11", "?12", "VERSION", "?14", "?15"
81 const s8 rxrpc_ack_priority[] = {
82 [0] = 0,
83 [RXRPC_ACK_DELAY] = 1,
84 [RXRPC_ACK_REQUESTED] = 2,
85 [RXRPC_ACK_IDLE] = 3,
86 [RXRPC_ACK_PING_RESPONSE] = 4,
87 [RXRPC_ACK_DUPLICATE] = 5,
88 [RXRPC_ACK_OUT_OF_SEQUENCE] = 6,
89 [RXRPC_ACK_EXCEEDS_WINDOW] = 7,
90 [RXRPC_ACK_NOSPACE] = 8,
93 const char *rxrpc_acks(u8 reason)
95 static const char *const str[] = {
96 "---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY",
97 "IDL", "-?-"
100 if (reason >= ARRAY_SIZE(str))
101 reason = ARRAY_SIZE(str) - 1;
102 return str[reason];