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cd354f1ae7
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
224 lines
5.2 KiB
C
224 lines
5.2 KiB
C
/*
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* LAPB release 002
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*
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* This code REQUIRES 2.1.15 or higher/ NET3.038
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*
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* This module:
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* This module is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* History
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* LAPB 001 Jonathan Naylor Started Coding
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* LAPB 002 Jonathan Naylor New timer architecture.
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <linux/inet.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <linux/fcntl.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <net/lapb.h>
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/*
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* This procedure is passed a buffer descriptor for an iframe. It builds
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* the rest of the control part of the frame and then writes it out.
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*/
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static void lapb_send_iframe(struct lapb_cb *lapb, struct sk_buff *skb, int poll_bit)
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{
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unsigned char *frame;
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if (!skb)
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return;
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if (lapb->mode & LAPB_EXTENDED) {
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frame = skb_push(skb, 2);
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frame[0] = LAPB_I;
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frame[0] |= lapb->vs << 1;
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frame[1] = poll_bit ? LAPB_EPF : 0;
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frame[1] |= lapb->vr << 1;
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} else {
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frame = skb_push(skb, 1);
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*frame = LAPB_I;
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*frame |= poll_bit ? LAPB_SPF : 0;
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*frame |= lapb->vr << 5;
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*frame |= lapb->vs << 1;
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}
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#if LAPB_DEBUG > 1
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printk(KERN_DEBUG "lapb: (%p) S%d TX I(%d) S%d R%d\n",
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lapb->dev, lapb->state, poll_bit, lapb->vs, lapb->vr);
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#endif
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lapb_transmit_buffer(lapb, skb, LAPB_COMMAND);
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}
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void lapb_kick(struct lapb_cb *lapb)
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{
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struct sk_buff *skb, *skbn;
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unsigned short modulus, start, end;
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modulus = (lapb->mode & LAPB_EXTENDED) ? LAPB_EMODULUS : LAPB_SMODULUS;
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start = !skb_peek(&lapb->ack_queue) ? lapb->va : lapb->vs;
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end = (lapb->va + lapb->window) % modulus;
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if (!(lapb->condition & LAPB_PEER_RX_BUSY_CONDITION) &&
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start != end && skb_peek(&lapb->write_queue)) {
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lapb->vs = start;
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/*
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* Dequeue the frame and copy it.
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*/
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skb = skb_dequeue(&lapb->write_queue);
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do {
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if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
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skb_queue_head(&lapb->write_queue, skb);
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break;
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}
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if (skb->sk)
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skb_set_owner_w(skbn, skb->sk);
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/*
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* Transmit the frame copy.
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*/
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lapb_send_iframe(lapb, skbn, LAPB_POLLOFF);
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lapb->vs = (lapb->vs + 1) % modulus;
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/*
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* Requeue the original data frame.
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*/
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skb_queue_tail(&lapb->ack_queue, skb);
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} while (lapb->vs != end && (skb = skb_dequeue(&lapb->write_queue)) != NULL);
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lapb->condition &= ~LAPB_ACK_PENDING_CONDITION;
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if (!lapb_t1timer_running(lapb))
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lapb_start_t1timer(lapb);
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}
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}
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void lapb_transmit_buffer(struct lapb_cb *lapb, struct sk_buff *skb, int type)
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{
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unsigned char *ptr;
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ptr = skb_push(skb, 1);
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if (lapb->mode & LAPB_MLP) {
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if (lapb->mode & LAPB_DCE) {
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if (type == LAPB_COMMAND)
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*ptr = LAPB_ADDR_C;
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if (type == LAPB_RESPONSE)
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*ptr = LAPB_ADDR_D;
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} else {
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if (type == LAPB_COMMAND)
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*ptr = LAPB_ADDR_D;
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if (type == LAPB_RESPONSE)
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*ptr = LAPB_ADDR_C;
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}
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} else {
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if (lapb->mode & LAPB_DCE) {
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if (type == LAPB_COMMAND)
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*ptr = LAPB_ADDR_A;
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if (type == LAPB_RESPONSE)
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*ptr = LAPB_ADDR_B;
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} else {
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if (type == LAPB_COMMAND)
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*ptr = LAPB_ADDR_B;
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if (type == LAPB_RESPONSE)
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*ptr = LAPB_ADDR_A;
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}
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}
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#if LAPB_DEBUG > 2
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printk(KERN_DEBUG "lapb: (%p) S%d TX %02X %02X %02X\n",
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lapb->dev, lapb->state,
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skb->data[0], skb->data[1], skb->data[2]);
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#endif
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if (!lapb_data_transmit(lapb, skb))
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kfree_skb(skb);
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}
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void lapb_establish_data_link(struct lapb_cb *lapb)
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{
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lapb->condition = 0x00;
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lapb->n2count = 0;
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if (lapb->mode & LAPB_EXTENDED) {
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#if LAPB_DEBUG > 1
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printk(KERN_DEBUG "lapb: (%p) S%d TX SABME(1)\n",
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lapb->dev, lapb->state);
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#endif
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lapb_send_control(lapb, LAPB_SABME, LAPB_POLLON, LAPB_COMMAND);
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} else {
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#if LAPB_DEBUG > 1
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printk(KERN_DEBUG "lapb: (%p) S%d TX SABM(1)\n",
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lapb->dev, lapb->state);
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#endif
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lapb_send_control(lapb, LAPB_SABM, LAPB_POLLON, LAPB_COMMAND);
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}
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lapb_start_t1timer(lapb);
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lapb_stop_t2timer(lapb);
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}
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void lapb_enquiry_response(struct lapb_cb *lapb)
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{
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#if LAPB_DEBUG > 1
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printk(KERN_DEBUG "lapb: (%p) S%d TX RR(1) R%d\n",
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lapb->dev, lapb->state, lapb->vr);
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#endif
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lapb_send_control(lapb, LAPB_RR, LAPB_POLLON, LAPB_RESPONSE);
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lapb->condition &= ~LAPB_ACK_PENDING_CONDITION;
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}
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void lapb_timeout_response(struct lapb_cb *lapb)
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{
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#if LAPB_DEBUG > 1
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printk(KERN_DEBUG "lapb: (%p) S%d TX RR(0) R%d\n",
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lapb->dev, lapb->state, lapb->vr);
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#endif
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lapb_send_control(lapb, LAPB_RR, LAPB_POLLOFF, LAPB_RESPONSE);
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lapb->condition &= ~LAPB_ACK_PENDING_CONDITION;
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}
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void lapb_check_iframes_acked(struct lapb_cb *lapb, unsigned short nr)
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{
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if (lapb->vs == nr) {
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lapb_frames_acked(lapb, nr);
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lapb_stop_t1timer(lapb);
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lapb->n2count = 0;
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} else if (lapb->va != nr) {
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lapb_frames_acked(lapb, nr);
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lapb_start_t1timer(lapb);
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}
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}
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void lapb_check_need_response(struct lapb_cb *lapb, int type, int pf)
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{
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if (type == LAPB_COMMAND && pf)
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lapb_enquiry_response(lapb);
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}
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