diff options
Diffstat (limited to 'src/udev')
| -rw-r--r-- | src/udev/udev-builtin-net_id.c | 48 |
1 files changed, 40 insertions, 8 deletions
diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c index 44a29fe371..bc6ca212db 100644 --- a/src/udev/udev-builtin-net_id.c +++ b/src/udev/udev-builtin-net_id.c @@ -24,16 +24,20 @@ * ww -- wwan * * types: - * o<index> -- on-board device index - * s<slot>f<function> -- hotplug slot number - * x<MAC> -- MAC address - * p<bus>s<slot>f<function> -- PCI/physical location + * o<index> -- on-board device index + * s<slot>[f<function>] -- hotplug slot number + * x<MAC> -- MAC address + * p<bus>s<slot>[f<function>] -- PCI/physical location * * example: * ID_NET_NAME_ONBOARD=eno1 - * ID_NET_NAME_SLOT=ens1f0 + * ID_NET_NAME_SLOT=ens1 + * ID_NET_NAME_SLOT=ens2f0 + * ID_NET_NAME_SLOT=ens2f1 * ID_NET_NAME_MAC=enxf0def180d479 - * ID_NET_NAME_PATH=enp19s0f0 + * ID_NET_NAME_PATH=enp0s25 + * ID_NET_NAME_PATH=enp19s3f0 + * ID_NET_NAME_PATH=enp19s3f1 */ #include <stdio.h> @@ -42,6 +46,7 @@ #include <unistd.h> #include <string.h> #include <errno.h> +#include <linux/pci_regs.h> #include "udev.h" @@ -77,6 +82,27 @@ static int dev_pci_onboard(struct udev_device *dev, struct udev_device *parent, return 0; } +static bool is_pci_singlefunction(struct udev_device *dev) { + char filename[256]; + FILE *f; + char config[256]; + bool single = false; + + snprintf(filename, sizeof(filename), "%s/config", udev_device_get_syspath(dev)); + f = fopen(filename, "re"); + if (!f) + goto out; + if (fread(&config, sizeof(config), 1, f) != 1) + goto out; + + /* bit 0-6 header type, bit 7 multi/single function device */ + if ((config[PCI_HEADER_TYPE] & 0x80) == 0) + single = true; +out: + fclose(f); + return single; +} + static int dev_pci_slot(struct udev_device *dev, struct udev_device *parent, const char *prefix, bool test) { struct udev *udev = udev_device_get_udev(dev); unsigned int bus; @@ -93,7 +119,10 @@ static int dev_pci_slot(struct udev_device *dev, struct udev_device *parent, con /* compose a name based on the raw kernel's PCI bus, slot numbers */ if (sscanf(udev_device_get_sysname(parent), "0000:%x:%x.%d", &bus, &slot, &func) != 3) return -ENOENT; - snprintf(str, sizeof(str), "%sp%ds%df%d", prefix, bus, slot, func); + if (func == 0 && is_pci_singlefunction(parent)) + snprintf(str, sizeof(str), "%sp%ds%d", prefix, bus, slot); + else + snprintf(str, sizeof(str), "%sp%ds%df%d", prefix, bus, slot, func); err = udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); if (err < 0) return err; @@ -137,7 +166,10 @@ static int dev_pci_slot(struct udev_device *dev, struct udev_device *parent, con closedir(dir); if (hotplug_slot > 0) { - snprintf(str, sizeof(str), "%ss%df%d", prefix, hotplug_slot, func); + if (func == 0 && is_pci_singlefunction(parent)) + snprintf(str, sizeof(str), "%ss%d", prefix, hotplug_slot); + else + snprintf(str, sizeof(str), "%ss%df%d", prefix, hotplug_slot, func); err = udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); } out: |