dist/ipf/ml_ipl.c

   1 /*      $NetBSD: ml_ipl.c,v 1.5 2007/06/04 12:38:58 martti Exp $        */
   2
   3 /*
   4  * Copyright (C) 1993-2001 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  */
   8 /*
   9  * 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
  10  * its own major char number! Way cool patch!
  11  */
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #include <sys/time.h>
  15 #include <sys/file.h>
  16 #include <sys/conf.h>
  17 #include <sys/syslog.h>
  18 #include <sys/buf.h>
  19 #include <sys/param.h>
  20 #include <sys/errno.h>
  21 #include <sys/uio.h>
  22 #include <sys/vnode.h>
  23 #include <sundev/mbvar.h>
  24 #include <sun/autoconf.h>
  25 #include <sun/vddrv.h>
  26 #if defined(sun4c) || defined(sun4m)
  27 #include <sun/openprom.h>
  28 #endif
  29
  30 #ifndef IPL_NAME
  31 #define IPL_NAME        "/dev/ipl"
  32 #endif
  33
  34 extern  int     ipfattach(), iplopen(), iplclose(), iplioctl(), iplread();
  35 extern  int     nulldev(), iplidentify(), errno;
  36
  37 struct  cdevsw  ipldevsw =
  38 {
  39         iplopen, iplclose, iplread, nulldev,
  40         iplioctl, nulldev, nulldev, nulldev,
  41         0, nulldev,
  42 };
  43
  44
  45 struct  dev_ops ipl_ops =
  46 {
  47         1,
  48         iplidentify,
  49         ipfattach,
  50         iplopen,
  51         iplclose,
  52         iplread,
  53         NULL,           /* write */
  54         NULL,           /* strategy */
  55         NULL,           /* dump */
  56         0,              /* psize */
  57         iplioctl,
  58         NULL,           /* reset */
  59         NULL            /* mmap */
  60 };
  61
  62 int     ipl_major = 0;
  63
  64 #ifdef sun4m
  65 struct  vdldrv  vd =
  66 {
  67         VDMAGIC_PSEUDO,
  68         "ipl",
  69         &ipl_ops,
  70         NULL,
  71         &ipldevsw,
  72         0,
  73         0,
  74         NULL,
  75         NULL,
  76         NULL,
  77         0,
  78         1,
  79 };
  80 #else /* sun4m */
  81 struct vdldrv vd =
  82 {
  83         VDMAGIC_PSEUDO, /* magic */
  84         "ipl",          /* name */
  85 #ifdef sun4c
  86         &ipl_ops,       /* dev_ops */
  87 #else
  88         NULL,           /* struct mb_ctlr *mb_ctlr */
  89         NULL,           /* struct mb_driver *mb_driver */
  90         NULL,           /* struct mb_device *mb_device */
  91         0,              /* num ctlrs */
  92         1,              /* numdevs */
  93 #endif /* sun4c */
  94         NULL,           /* bdevsw */
  95         &ipldevsw,      /* cdevsw */
  96         0,              /* block major */
  97         0,              /* char major */
  98 };
  99 #endif /* sun4m */
 100
 101 extern int vd_unuseddev();
 102 extern struct cdevsw cdevsw[];
 103 extern int nchrdev;
 104
 105 xxxinit(fc, vdp, vdi, vds)
 106 u_int   fc;
 107 struct  vddrv   *vdp;
 108 caddr_t vdi;
 109 struct  vdstat  *vds;
 110 {
 111         struct  vdlinkage *v;
 112         int     i;
 113
 114         switch (fc)
 115         {
 116         case VDLOAD:
 117                 while (ipl_major < nchrdev &&
 118                        cdevsw[ipl_major].d_open != vd_unuseddev)
 119                         ipl_major++;
 120                 if (ipl_major == nchrdev)
 121                         return ENODEV;
 122                 vd.Drv_charmajor = ipl_major;
 123                 vdp->vdd_vdtab = (struct vdlinkage *)&vd;
 124                 return ipl_attach(vdi);
 125         case VDUNLOAD:
 126                 return unload(vdp, vdi);
 127
 128         case VDSTAT:
 129                 return 0;
 130
 131         default:
 132                 return EIO;
 133         }
 134 }
 135
 136 static unload(vdp, vdi)
 137         struct vddrv *vdp;
 138         struct vdioctl_unload  *vdi;
 139 {
 140         int     i;
 141
 142         (void) vn_remove(IPL_NAME, UIO_SYSSPACE, FILE);
 143         return ipfdetach();
 144 }
 145
 146
 147 static  int     ipl_attach(vdi)
 148 struct  vdioctl_load    *vdi;
 149 {
 150         struct  vnode   *vp;
 151         struct  vattr   vattr;
 152         int             error = 0, fmode = S_IFCHR|0600;
 153
 154         (void) vn_remove(IPL_NAME, UIO_SYSSPACE, FILE);
 155         vattr_null(&vattr);
 156         vattr.va_type = MFTOVT(fmode);
 157         vattr.va_mode = (fmode & 07777);
 158         vattr.va_rdev = ipl_major<<8;
 159
 160         error = vn_create(IPL_NAME, UIO_SYSSPACE, &vattr, EXCL, 0, &vp);
 161         if (error == 0)
 162                 VN_RELE(vp);
 163         return ipfattach(0);
 164 }