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#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <modprobe.h>
#include "common.h"
struct utsname rel_buf;
struct module_command *commands = NULL;
struct module_options *modoptions = NULL;
struct module_alias *aliases = NULL;
struct module_blacklist *blacklist = NULL;
const char *config = NULL;
char *optstring;
char *aliasfilename, *symfilename;
int init;
static void find_modules_through_aliases(struct pciusb_entries *entries) {
unsigned int i;
char *dirname;
uname(&rel_buf);
asprintf(&dirname, "%s/%s", MODULE_DIR, rel_buf.release);
asprintf(&aliasfilename, "%s/modules.alias", dirname);
asprintf(&symfilename, "%s/modules.symbols", dirname);
if (!init) {
init = 1;
read_toplevel_config(config, "", 0, 0,
&modoptions, &commands, &aliases, &blacklist);
// We would need parse the alias db only once for speedup
/*
read_toplevel_config(config, "", 1, 0,
&modoptions, &commands, &aliases, &blacklist);
read_config(aliasfilename, "", 1, 0,&modoptions, &commands,
&aliases, &blacklist);
read_config(symfilename, "", 1, 0, &modoptions, &commands,
&aliases, &blacklist);
*/
}
for (i = 0; i < entries->nb; i++) {
struct pciusb_entry *e = &entries->entries[i];
// No special case found in pcitable ? Then lookup modalias for PCI devices
if (e->module && 0 == strcmp(e->module, "unknown"))
continue;
char *modalias = NULL;
char *modalias_path;
FILE *file;
LIST_HEAD(list);
asprintf(&modalias_path, "/sys/bus/pci/devices/%04x:%02x:%02x.%x/modalias", e->pci_domain, e->pci_bus, e->pci_device, e->pci_function);
file = fopen(modalias_path, "r");
free(modalias_path);
if (file) {
size_t n, size;
if (-1 == getline(&modalias, &n, file)) {
printf("Unable to read modalias from %s\n", modalias_path);
exit(1);
}
size = strlen(modalias);
if (size)
modalias[size-1] = 0;
} else {
printf("Unable to read modalias from %s\n", modalias_path);
exit(1);
}
/* Returns the resolved alias, options */
read_toplevel_config(config, modalias, 0,
0, &modoptions, &commands, &aliases, &blacklist);
if (!aliases) {
/* We only use canned aliases as last resort. */
read_depends(dirname, modalias, &list);
if (list_empty(&list)
&& !find_command(modalias, commands))
{
read_config(aliasfilename, modalias, 0,
0, &modoptions, &commands,
&aliases, &blacklist);
aliases = apply_blacklist(aliases, blacklist);
}
}
if (aliases) {
// take the last one because we find eg: generic/ata_generic/sata_sil
while (aliases->next)
aliases = aliases->next;
ifree(e->module);
e->module = strdup(aliases->module);
aliases = NULL;
}
}
}
extern int pciusb_find_modules(struct pciusb_entries *entries, const char *fpciusbtable, const descr_lookup descr_lookup, int is_pci) {
fh f;
char buf[2048];
int line;
f = fh_open(fpciusbtable);
for (line = 1; fgets(buf, sizeof(buf) - 1, f.f); line++) {
unsigned short vendor, device, subvendor, subdevice;
char *p = NULL, *q = NULL;
int offset; unsigned int i;
int nb;
if (buf[0]=='#')
continue; // skip comments
nb = sscanf(buf, "0x%hx\t0x%hx\t0x%hx\t0x%hx\t%n", &vendor, &device, &subvendor, &subdevice, &offset);
if (nb != 4) {
nb = sscanf(buf, "0x%hx\t0x%hx\t%n", &vendor, &device, &offset);
if (nb != 2) {
fprintf(stderr, "%s %d: bad line\n", fpciusbtable, line);
continue; // skip bad line
}
}
for (i = 0; i < entries->nb; i++) {
struct pciusb_entry *e = &entries->entries[i];
if (e->already_found)
continue; // skip since already found with sub ids
if (vendor != e->vendor || device != e->device)
continue; // main ids differ
if (nb == 4 && !(subvendor == e->subvendor && subdevice == e->subdevice))
continue; // subids differ
if (!p) { // only calc text & module if not already done
p = buf + offset + 1;
q = strchr(p, '\t');
}
if (strncmp(p, "unknown", q-p-1)) {
ifree(e->module);
e->module = strndup(p,q-p-1);
}
/* special case for buggy 0x0 usb entry */
if (descr_lookup == LOAD && 2 < strlen(q+2) && vendor != 0 && device != 0 && e->class_id != 0x90000d) { /* Hub class */
ifree(e->text); /* usb.c set it so that we display something when usbtable doesn't refer that hw*/
e->text = strndup(q+2, strlen(q)-4);
}
/* if subids read on pcitable line, we know that subids matches :
(see "subids differ" test above) */
if (nb == 4)
e->already_found = 1;
}
}
fh_close(&f);
/* If no special case in pcitable, then lookup modalias for PCI devices
(USB are already done by kernel)
*/
if (is_pci)
find_modules_through_aliases(entries);
return 1;
}
extern void pciusb_initialize(struct pciusb_entry *e) {
e->vendor = 0xffff;
e->device = 0xffff;
e->subvendor = 0xffff;
e->subdevice = 0xffff;
e->class_id = 0;
e->pci_bus = 0xffff;
e->pci_device = 0xffff;
e->pci_function = 0xffff;
e->module = NULL;
e->text = NULL;
e->class = NULL;
e->already_found = 0;
}
extern void pciusb_free(struct pciusb_entries *entries) {
unsigned int i;
for (i = 0; i < entries->nb; i++) {
struct pciusb_entry *e = &entries->entries[i];
ifree(e->module);
ifree(e->text);
}
if (entries->nb) ifree(entries->entries);
}
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