X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fudev%2Fudev-builtin-net_id.c;h=37ff1b800882a2a2d9c13a59d21c35d18bd23682;hb=d42688ef21a695f8a30b0d899dafdc6ff1ee0973;hp=aa08196adb3055e306ac4888c999c521d7c8277a;hpb=bf81e792f3c0aed54edf004c1c95cc6f6d81d0ee;p=elogind.git

diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
index aa08196ad..37ff1b800 100644
--- a/src/udev/udev-builtin-net_id.c
+++ b/src/udev/udev-builtin-net_id.c
@@ -36,9 +36,9 @@
  *   b<number>                             -- BCMA bus core number
  *   ccw<name>                             -- CCW bus group name
  *   o<index>                              -- on-board device index number
- *   s<slot>[f<function>][d<dev_id>]       -- hotplug slot index number
+ *   s<slot>[f<function>][d<dev_port>]     -- hotplug slot index number
  *   x<MAC>                                -- MAC address
- *   [P<domain>]p<bus>s<slot>[f<function>][d<dev_id>]
+ *   [P<domain>]p<bus>s<slot>[f<function>][d<dev_port>]
  *                                         -- PCI geographical location
  *   [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>]
  *                                         -- USB port number chain
@@ -94,6 +94,7 @@
 #include <string.h>
 #include <errno.h>
 #include <net/if.h>
+#include <net/if_arp.h>
 #include <linux/pci_regs.h>
 
 #include "udev.h"
@@ -148,30 +149,27 @@ static int dev_pci_onboard(struct udev_device *dev, struct netnames *names) {
 
 /* read the 256 bytes PCI configuration space to check the multi-function bit */
 static bool is_pci_multifunction(struct udev_device *dev) {
-        char filename[256];
-        FILE *f = NULL;
-        char config[64];
-        bool multi = false;
+        _cleanup_fclose_ FILE *f = NULL;
+        const char *filename;
+        uint8_t config[64];
 
-        snprintf(filename, sizeof(filename), "%s/config", udev_device_get_syspath(dev));
+        filename = strjoina(udev_device_get_syspath(dev), "/config");
         f = fopen(filename, "re");
         if (!f)
-                goto out;
+                return false;
         if (fread(&config, sizeof(config), 1, f) != 1)
-                goto out;
+                return false;
 
         /* bit 0-6 header type, bit 7 multi/single function device */
         if ((config[PCI_HEADER_TYPE] & 0x80) != 0)
-                multi = true;
-out:
-        if (f)
-                fclose(f);
-        return multi;
+                return true;
+
+        return false;
 }
 
 static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
         struct udev *udev = udev_device_get_udev(names->pcidev);
-        unsigned domain, bus, slot, func, dev_id = 0;
+        unsigned domain, bus, slot, func, dev_port = 0;
         size_t l;
         char *s;
         const char *attr;
@@ -185,20 +183,20 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
                 return -ENOENT;
 
         /* kernel provided multi-device index */
-        attr = udev_device_get_sysattr_value(dev, "dev_id");
+        attr = udev_device_get_sysattr_value(dev, "dev_port");
         if (attr)
-                dev_id = strtol(attr, NULL, 16);
+                dev_port = strtol(attr, NULL, 10);
 
         /* compose a name based on the raw kernel's PCI bus, slot numbers */
         s = names->pci_path;
         l = sizeof(names->pci_path);
         if (domain > 0)
-                l = strpcpyf(&s, l, "P%d", domain);
-        l = strpcpyf(&s, l, "p%ds%d", bus, slot);
+                l = strpcpyf(&s, l, "P%u", domain);
+        l = strpcpyf(&s, l, "p%us%u", bus, slot);
         if (func > 0 || is_pci_multifunction(names->pcidev))
-                l = strpcpyf(&s, l, "f%d", func);
-        if (dev_id > 0)
-                l = strpcpyf(&s, l, "d%d", dev_id);
+                l = strpcpyf(&s, l, "f%u", func);
+        if (dev_port > 0)
+                l = strpcpyf(&s, l, "d%u", dev_port);
         if (l == 0)
                 names->pci_path[0] = '\0';
 
@@ -247,8 +245,8 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
                 l = strpcpyf(&s, l, "s%d", hotplug_slot);
                 if (func > 0 || is_pci_multifunction(names->pcidev))
                         l = strpcpyf(&s, l, "f%d", func);
-                if (dev_id > 0)
-                        l = strpcpyf(&s, l, "d%d", dev_id);
+                if (dev_port > 0)
+                        l = strpcpyf(&s, l, "d%d", dev_port);
                 if (l == 0)
                         names->pci_path[0] = '\0';
         }
@@ -309,7 +307,7 @@ static int names_usb(struct udev_device *dev, struct netnames *names) {
         s[0] = '\0';
         interf = s+1;
 
-        /* prefix every port number in the chain with "u"*/
+        /* prefix every port number in the chain with "u" */
         s = ports;
         while ((s = strchr(s, '.')))
                 s[0] = 'u';
@@ -451,10 +449,10 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
                 return EXIT_FAILURE;
         i = strtoul(s, NULL, 0);
         switch (i) {
-        case 1: /* ARPHRD_ETHER */
+        case ARPHRD_ETHER:
                 prefix = "en";
                 break;
-        case 256: /* ARPHRD_SLIP */
+        case ARPHRD_SLIP:
                 prefix = "sl";
                 break;
         default:
@@ -564,5 +562,5 @@ out:
 const struct udev_builtin udev_builtin_net_id = {
         .name = "net_id",
         .cmd = builtin_net_id,
-        .help = "network device properties",
+        .help = "Network device properties",
 };