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#define _GNU_SOURCE |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/wait.h> |
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#include <sys/utsname.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <dirent.h> |
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#include <libkmod.h> |
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#include "common.h" |
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|
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static void set_modules_from_modalias_file(struct kmod_ctx *ctx, struct pciusb_entry *e, char *modalias_path) { |
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FILE *file; |
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file = fopen(modalias_path, "r"); |
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if (file) { |
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char *modalias = NULL; |
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size_t n, size; |
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if (-1 == getline(&modalias, &n, file)) { |
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fprintf(stderr, "Unable to read modalias from %s\n", modalias_path); |
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fclose(file); |
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return; |
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} |
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fclose(file); |
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size = strlen(modalias); |
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if (size) |
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modalias[size-1] = 0; |
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|
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ifree(e->module); |
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e->module = modalias_resolve_module(ctx, modalias); |
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free(modalias); |
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} else { |
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fprintf(stderr, "Unable to read modalias from %s\n", modalias_path); |
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return; |
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} |
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} |
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|
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static void find_pci_modules_through_aliases(struct kmod_ctx *ctx, struct pciusb_entry *e) { |
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char *modalias_path; |
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asprintf(&modalias_path, |
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"/sys/bus/pci/devices/%04x:%02x:%02x.%x/modalias", |
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e->pci_domain, e->pci_bus, e->pci_device, e->pci_function); |
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set_modules_from_modalias_file(ctx, e, modalias_path); |
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free(modalias_path); |
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} |
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|
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static void find_usb_modules_through_aliases(struct kmod_ctx *ctx, struct pciusb_entry *e) { |
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char *usb_prefix, *sysfs_path; |
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DIR *dir; |
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struct dirent *dent; |
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|
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asprintf(&usb_prefix, "%d-", e->pci_bus); |
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/* USB port is indexed from 0 in procfs, from 1 in sysfs */ |
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asprintf(&sysfs_path, "/sys/bus/usb/devices/%d-%d", e->pci_bus, e->usb_port + 1); |
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|
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dir = opendir(sysfs_path); |
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if (!dir) { |
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goto end; |
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} |
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while ((dent = readdir(dir)) != NULL) { |
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if ((dent->d_type == DT_DIR) && |
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!strncmp(usb_prefix, dent->d_name, strlen(usb_prefix))) { |
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char *modalias_path; |
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asprintf(&modalias_path, "%s/%s/modalias", sysfs_path, dent->d_name); |
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set_modules_from_modalias_file(ctx, e, modalias_path); |
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free(modalias_path); |
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/* maybe we would need a "other_modules" field in pciusb_entry |
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to list modules from all USB interfaces */ |
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if (e->module) |
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break; |
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} |
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} |
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closedir(dir); |
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end: |
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free(sysfs_path); |
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free(usb_prefix); |
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} |
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|
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static void find_modules_through_aliases_one(struct kmod_ctx *ctx, const char *bus, struct pciusb_entry *e) { |
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if (!strcmp("pci", bus)) { |
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find_pci_modules_through_aliases(ctx, e); |
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} else if (!strcmp("usb", bus)) { |
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find_usb_modules_through_aliases(ctx, e); |
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} |
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} |
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|
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static void find_modules_through_aliases(const char *bus, struct pciusb_entries *entries) { |
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unsigned int i; |
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struct kmod_ctx *ctx = modalias_init(); |
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for (i = 0; i < entries->nb; i++) { |
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struct pciusb_entry *e = &entries->entries[i]; |
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|
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// No special case found in pcitable ? Then lookup modalias for PCI devices |
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if (e->module && strcmp(e->module, "unknown")) |
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continue; |
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find_modules_through_aliases_one(ctx, bus, e); |
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} |
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|
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modalias_cleanup(ctx); |
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} |
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|
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extern int pciusb_find_modules(struct pciusb_entries *entries, const char *fpciusbtable, const descr_lookup descr_lookup, int is_pci) { |
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fh f; |
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char buf[2048]; |
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int line; |
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|
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f = fh_open(fpciusbtable); |
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|
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for (line = 1; fh_gets(buf, sizeof(buf) - 1, &f); line++) { |
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unsigned short vendor, device, subvendor, subdevice; |
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char *p = NULL, *q = NULL; |
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int offset; unsigned int i; |
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int nb; |
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if (buf[0]=='#') |
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continue; // skip comments |
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|
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nb = sscanf(buf, "0x%hx\t0x%hx\t0x%hx\t0x%hx\t%n", &vendor, &device, &subvendor, &subdevice, &offset); |
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if (nb != 4) { |
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nb = sscanf(buf, "0x%hx\t0x%hx\t%n", &vendor, &device, &offset); |
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if (nb != 2) { |
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fprintf(stderr, "%s %d: bad line\n", fpciusbtable, line); |
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continue; // skip bad line |
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} |
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} |
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for (i = 0; i < entries->nb; i++) { |
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struct pciusb_entry *e = &entries->entries[i]; |
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if (e->already_found) |
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continue; // skip since already found with sub ids |
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if (vendor != e->vendor || device != e->device) |
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continue; // main ids differ |
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|
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if (nb == 4 && !(subvendor == e->subvendor && subdevice == e->subdevice)) |
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continue; // subids differ |
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|
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if (!p) { // only calc text & module if not already done |
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p = buf + offset + 1; |
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q = strchr(p, '\t'); |
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if (!q) // no description field? |
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q = strchr(p, '\0') - 1; |
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} |
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if (strncmp(p, "unknown", q-p-1)) { |
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ifree(e->module); |
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e->module = strndup(p,q-p-1); |
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} |
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/* special case for buggy 0x0 usb entry */ |
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if (descr_lookup == LOAD && strlen(q) > 1 && 2 < strlen(q+2) && vendor != 0 && device != 0 && e->class_id != 0x90000d) { /* Hub class */ |
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ifree(e->text); /* usb.c set it so that we display something when usbtable doesn't refer that hw*/ |
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e->text = strndup(q+2, strlen(q)-4); |
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} |
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/* if subids read on pcitable line, we know that subids matches : |
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(see "subids differ" test above) */ |
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if (nb == 4) |
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e->already_found = 1; |
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} |
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} |
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fh_close(&f); |
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|
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/* If no special case in pcitable, then lookup modalias for devices */ |
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const char *bus = is_pci ? "pci" : "usb"; |
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find_modules_through_aliases(bus, entries); |
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|
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return 1; |
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} |
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|
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extern void pciusb_initialize(struct pciusb_entry *e) { |
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e->vendor = 0xffff; |
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e->device = 0xffff; |
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e->subvendor = 0xffff; |
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e->subdevice = 0xffff; |
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e->class_id = 0; |
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e->pci_bus = 0xff; |
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e->pci_device = 0xff; |
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e->pci_function = 0xff; |
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e->pci_revision = 0; |
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e->usb_port = 0xffff; |
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e->module = NULL; |
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e->text = NULL; |
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e->class = NULL; |
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e->already_found = 0; |
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e->is_pciexpress = 0; |
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} |
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|
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extern void pciusb_free(struct pciusb_entries *entries) { |
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unsigned int i; |
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for (i = 0; i < entries->nb; i++) { |
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struct pciusb_entry *e = &entries->entries[i]; |
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ifree(e->module); |
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ifree(e->text); |
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ifree(e->class); |
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} |
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if (entries->nb) ifree(entries->entries); |
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} |
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