6008862bc2
most cases NULL is passed, but in some cases such as network driver locks (which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used. Tested on: i386, alpha, sparc64
456 lines
11 KiB
C
456 lines
11 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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#if NI4BTRC > 0
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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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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif
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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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/* open */ i4btrcopen,
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/* close */ i4btrcclose,
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/* read */ i4btrcread,
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/* write */ nowrite,
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/* ioctl */ i4btrcioctl,
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/* poll */ i4btrcpoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "i4btrc",
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/* maj */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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};
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/*---------------------------------------------------------------------------*
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* interface init routine
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*---------------------------------------------------------------------------*/
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static
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void i4btrcinit(void *unused)
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{
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cdevsw_add(&i4btrc_cdevsw);
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}
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SYSINIT(i4btrcdev, SI_SUB_DRIVERS,
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SI_ORDER_MIDDLE+CDEV_MAJOR, &i4btrcinit, NULL);
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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((caddr_t) &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((caddr_t) &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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#endif /* NI4BTRC > 0 */
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