7ac40f5f59
branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
430 lines
10 KiB
C
430 lines
10 KiB
C
/*
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* Copyright (c) 1997, 2002 Hellmuth Michaelis. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*---------------------------------------------------------------------------
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*
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* i4btrc - device driver for trace data read device
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* ---------------------------------------------------
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*
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* last edit-date: [Sun Mar 17 09:52:51 2002]
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*
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* $FreeBSD$
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*
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* NOTE: the code assumes that SPLI4B >= splimp !
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*
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*---------------------------------------------------------------------------*/
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#include "i4btrc.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioccom.h>
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#include <sys/conf.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <sys/tty.h>
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#include <machine/i4b_trace.h>
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#include <machine/i4b_ioctl.h>
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#include <i4b/include/i4b_mbuf.h>
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#include <i4b/include/i4b_global.h>
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#include <i4b/include/i4b_l3l4.h>
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static struct ifqueue trace_queue[NI4BTRC];
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static int device_state[NI4BTRC];
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#define ST_IDLE 0x00
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#define ST_ISOPEN 0x01
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#define ST_WAITDATA 0x02
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static int analyzemode = 0;
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static int rxunit = -1;
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static int txunit = -1;
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static int outunit = -1;
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static d_open_t i4btrcopen;
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static d_close_t i4btrcclose;
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static d_read_t i4btrcread;
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static d_ioctl_t i4btrcioctl;
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static d_poll_t i4btrcpoll;
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#define CDEV_MAJOR 59
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static struct cdevsw i4btrc_cdevsw = {
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.d_open = i4btrcopen,
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.d_close = i4btrcclose,
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.d_read = i4btrcread,
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.d_ioctl = i4btrcioctl,
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.d_poll = i4btrcpoll,
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.d_name = "i4btrc",
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.d_maj = CDEV_MAJOR,
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};
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static void i4btrcattach(void *);
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PSEUDO_SET(i4btrcattach, i4b_trace);
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int get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf);
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/*---------------------------------------------------------------------------*
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* interface attach routine
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*---------------------------------------------------------------------------*/
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static void
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i4btrcattach(void *dummy)
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{
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int i;
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printf("i4btrc: %d ISDN trace device(s) attached\n", NI4BTRC);
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for(i=0; i < NI4BTRC; i++)
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{
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make_dev(&i4btrc_cdevsw, i,
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UID_ROOT, GID_WHEEL, 0600, "i4btrc%d", i);
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trace_queue[i].ifq_maxlen = IFQ_MAXLEN;
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if(!mtx_initialized(&trace_queue[i].ifq_mtx))
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mtx_init(&trace_queue[i].ifq_mtx, "i4b_trace", NULL, MTX_DEF);
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device_state[i] = ST_IDLE;
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}
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}
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/*---------------------------------------------------------------------------*
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* get_trace_data_from_l1()
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* ------------------------
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* is called from layer 1, adds timestamp to trace data and puts
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* it into a queue, from which it can be read from the i4btrc
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* device. The unit number in the trace header selects the minor
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* device's queue the data is put into.
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*---------------------------------------------------------------------------*/
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int
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get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf)
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{
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struct mbuf *m;
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int x;
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int unit;
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int trunc = 0;
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int totlen = len + sizeof(i4b_trace_hdr_t);
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/*
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* for telephony (or better non-HDLC HSCX mode) we get
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* (MCLBYTE + sizeof(i4b_trace_hdr_t)) length packets
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* to put into the queue to userland. because of this
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* we detect this situation, strip the length to MCLBYTES
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* max size, and infor the userland program of this fact
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* by putting the no of truncated bytes into hdr->trunc.
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*/
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if(totlen > MCLBYTES)
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{
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trunc = 1;
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hdr->trunc = totlen - MCLBYTES;
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totlen = MCLBYTES;
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}
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else
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{
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hdr->trunc = 0;
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}
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/* set length of trace record */
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hdr->length = totlen;
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/* check valid unit no */
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if((unit = hdr->unit) > NI4BTRC)
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{
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printf("i4b_trace: get_trace_data_from_l1 - unit > NI4BTRC!\n");
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return(0);
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}
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/* get mbuf */
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if(!(m = i4b_Bgetmbuf(totlen)))
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{
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printf("i4b_trace: get_trace_data_from_l1 - i4b_getmbuf() failed!\n");
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return(0);
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}
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/* check if we are in analyzemode */
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if(analyzemode && (unit == rxunit || unit == txunit))
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{
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if(unit == rxunit)
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hdr->dir = FROM_NT;
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else
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hdr->dir = FROM_TE;
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unit = outunit;
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}
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IF_LOCK(&trace_queue[unit]);
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if(_IF_QFULL(&trace_queue[unit]))
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{
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struct mbuf *m1;
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x = SPLI4B();
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_IF_DEQUEUE(&trace_queue[unit], m1);
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splx(x);
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i4b_Bfreembuf(m1);
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}
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/* copy trace header */
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memcpy(m->m_data, hdr, sizeof(i4b_trace_hdr_t));
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/* copy trace data */
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if(trunc)
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memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, totlen-sizeof(i4b_trace_hdr_t));
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else
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memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, len);
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x = SPLI4B();
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_IF_ENQUEUE(&trace_queue[unit], m);
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IF_UNLOCK(&trace_queue[unit]);
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if(device_state[unit] & ST_WAITDATA)
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{
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device_state[unit] &= ~ST_WAITDATA;
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wakeup( &trace_queue[unit]);
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}
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splx(x);
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return(1);
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}
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/*---------------------------------------------------------------------------*
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* open trace device
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*---------------------------------------------------------------------------*/
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static int
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i4btrcopen(dev_t dev, int flag, int fmt, struct thread *td)
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{
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int x;
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int unit = minor(dev);
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if(unit >= NI4BTRC)
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return(ENXIO);
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if(device_state[unit] & ST_ISOPEN)
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return(EBUSY);
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if(analyzemode && (unit == outunit || unit == rxunit || unit == txunit))
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return(EBUSY);
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x = SPLI4B();
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device_state[unit] = ST_ISOPEN;
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splx(x);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* close trace device
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*---------------------------------------------------------------------------*/
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static int
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i4btrcclose(dev_t dev, int flag, int fmt, struct thread *td)
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{
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int unit = minor(dev);
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int i, x;
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int cno = -1;
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for(i=0; i < nctrl; i++)
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{
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if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[i].unit == unit))
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{
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cno = i;
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break;
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}
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}
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if(analyzemode && (unit == outunit))
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{
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analyzemode = 0;
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outunit = -1;
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if(cno >= 0)
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{
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(*ctrl_desc[cno].N_MGMT_COMMAND)(rxunit, CMR_SETTRACE, TRACE_OFF);
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(*ctrl_desc[cno].N_MGMT_COMMAND)(txunit, CMR_SETTRACE, TRACE_OFF);
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}
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rxunit = -1;
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txunit = -1;
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}
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if(cno >= 0)
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{
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(*ctrl_desc[cno].N_MGMT_COMMAND)(ctrl_desc[cno].unit, CMR_SETTRACE, TRACE_OFF);
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}
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x = SPLI4B();
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device_state[unit] = ST_IDLE;
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splx(x);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* read from trace device
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*---------------------------------------------------------------------------*/
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static int
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i4btrcread(dev_t dev, struct uio * uio, int ioflag)
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{
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struct mbuf *m;
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int x;
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int error = 0;
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int unit = minor(dev);
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if(!(device_state[unit] & ST_ISOPEN))
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return(EIO);
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x = SPLI4B();
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IF_LOCK(&trace_queue[unit]);
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while(IF_QEMPTY(&trace_queue[unit]) && (device_state[unit] & ST_ISOPEN))
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{
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device_state[unit] |= ST_WAITDATA;
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if((error = msleep( &trace_queue[unit],
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&trace_queue[unit].ifq_mtx,
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TTIPRI | PCATCH,
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"bitrc", 0 )) != 0)
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{
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device_state[unit] &= ~ST_WAITDATA;
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IF_UNLOCK(&trace_queue[unit]);
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splx(x);
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return(error);
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}
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}
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_IF_DEQUEUE(&trace_queue[unit], m);
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IF_UNLOCK(&trace_queue[unit]);
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if(m && m->m_len)
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error = uiomove(m->m_data, m->m_len, uio);
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else
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error = EIO;
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if(m)
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i4b_Bfreembuf(m);
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splx(x);
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return(error);
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}
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/*---------------------------------------------------------------------------*
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* poll device
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*---------------------------------------------------------------------------*/
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static int
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i4btrcpoll(dev_t dev, int events, struct thread *td)
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{
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return(ENODEV);
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}
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/*---------------------------------------------------------------------------*
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* device driver ioctl routine
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*---------------------------------------------------------------------------*/
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static int
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i4btrcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
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{
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int error = 0;
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int unit = minor(dev);
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i4b_trace_setupa_t *tsa;
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int i;
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int cno = -1;
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/* find the first passive controller matching our unit no */
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for(i=0; i < nctrl; i++)
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{
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if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[i].unit == unit))
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{
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cno = i;
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break;
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}
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}
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switch(cmd)
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{
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case I4B_TRC_SET:
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if(cno < 0)
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return ENOTTY;
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(*ctrl_desc[cno].N_MGMT_COMMAND)(ctrl_desc[cno].unit, CMR_SETTRACE, (void *)*(unsigned int *)data);
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break;
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case I4B_TRC_SETA:
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tsa = (i4b_trace_setupa_t *)data;
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if(tsa->rxunit >= 0 && tsa->rxunit < NI4BTRC)
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rxunit = tsa->rxunit;
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else
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error = EINVAL;
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if(tsa->txunit >= 0 && tsa->txunit < NI4BTRC)
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txunit = tsa->txunit;
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else
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error = EINVAL;
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if(error)
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{
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outunit = -1;
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rxunit = -1;
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txunit = -1;
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}
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else
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{
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if(cno < 0)
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return ENOTTY;
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outunit = unit;
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analyzemode = 1;
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(*ctrl_desc[cno].N_MGMT_COMMAND)(rxunit, CMR_SETTRACE, (int *)(tsa->rxflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX)));
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(*ctrl_desc[cno].N_MGMT_COMMAND)(txunit, CMR_SETTRACE, (int *)(tsa->txflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX)));
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}
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break;
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case I4B_TRC_RESETA:
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analyzemode = 0;
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outunit = -1;
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rxunit = -1;
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txunit = -1;
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break;
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default:
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error = ENOTTY;
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break;
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}
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return(error);
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}
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