lib/filter.c

   1 /*
   2  *      The PCI Library -- Device Filtering
   3  *
   4  *      Copyright (c) 1998--2003 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11
  12 #include "internal.h"
  13
  14 void
  15 pci_filter_init(struct pci_access *a UNUSED, struct pci_filter *f)
  16 {
  17   f->domain = f->bus = f->slot = f->func = -1;
  18   f->vendor = f->device = -1;
  19 }
  20
  21 /* Slot filter syntax: [[[domain]:][bus]:][slot][.[func]] */
  22
  23 char *
  24 pci_filter_parse_slot(struct pci_filter *f, char *str)
  25 {
  26   char *colon = strrchr(str, ':');
  27   char *dot = strchr((colon ? colon + 1 : str), '.');
  28   char *mid = str;
  29   char *e, *bus, *colon2;
  30
  31   if (colon)
  32     {
  33       *colon++ = 0;
  34       mid = colon;
  35       colon2 = strchr(str, ':');
  36       if (colon2)
  37         {
  38           *colon2++ = 0;
  39           bus = colon2;
  40           if (str[0] && strcmp(str, "*"))
  41             {
  42               long int x = strtol(str, &e, 16);
  43               if ((e && *e) || (x < 0 || x > 0xffff))
  44                 return "Invalid domain number";
  45               f->domain = x;
  46             }
  47         }
  48       else
  49         bus = str;
  50       if (bus[0] && strcmp(bus, "*"))
  51         {
  52           long int x = strtol(bus, &e, 16);
  53           if ((e && *e) || (x < 0 || x > 0xff))
  54             return "Invalid bus number";
  55           f->bus = x;
  56         }
  57     }
  58   if (dot)
  59     *dot++ = 0;
  60   if (mid[0] && strcmp(mid, "*"))
  61     {
  62       long int x = strtol(mid, &e, 16);
  63       if ((e && *e) || (x < 0 || x > 0x1f))
  64         return "Invalid slot number";
  65       f->slot = x;
  66     }
  67   if (dot && dot[0] && strcmp(dot, "*"))
  68     {
  69       long int x = strtol(dot, &e, 16);
  70       if ((e && *e) || (x < 0 || x > 7))
  71         return "Invalid function number";
  72       f->func = x;
  73     }
  74   return NULL;
  75 }
  76
  77 /* ID filter syntax: [vendor]:[device] */
  78
  79 char *
  80 pci_filter_parse_id(struct pci_filter *f, char *str)
  81 {
  82   char *s, *e;
  83
  84   if (!*str)
  85     return NULL;
  86   s = strchr(str, ':');
  87   if (!s)
  88     return "':' expected";
  89   *s++ = 0;
  90   if (str[0] && strcmp(str, "*"))
  91     {
  92       long int x = strtol(str, &e, 16);
  93       if ((e && *e) || (x < 0 || x > 0xffff))
  94         return "Invalid vendor ID";
  95       f->vendor = x;
  96     }
  97   if (s[0] && strcmp(s, "*"))
  98     {
  99       long int x = strtol(s, &e, 16);
 100       if ((e && *e) || (x < 0 || x > 0xffff))
 101         return "Invalid device ID";
 102       f->device = x;
 103     }
 104   return NULL;
 105 }
 106
 107 int
 108 pci_filter_match(struct pci_filter *f, struct pci_dev *d)
 109 {
 110   if ((f->domain >= 0 && f->domain != d->domain) ||
 111       (f->bus >= 0 && f->bus != d->bus) ||
 112       (f->slot >= 0 && f->slot != d->dev) ||
 113       (f->func >= 0 && f->func != d->func))
 114     return 0;
 115   if (f->device >= 0 || f->vendor >= 0)
 116     {
 117       pci_fill_info_v32(d, PCI_FILL_IDENT);
 118       if ((f->device >= 0 && f->device != d->device_id) ||
 119           (f->vendor >= 0 && f->vendor != d->vendor_id))
 120         return 0;
 121     }
 122   return 1;
 123 }