| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| /* |
| * Predictable network interface device names based on: |
| * - firmware/bios-provided index numbers for on-board devices |
| * - firmware-provided pci-express hotplug slot index number |
| * - physical/geographical location of the hardware |
| * - the interface's MAC address |
| * |
| * https://systemd.io/PREDICTABLE_INTERFACE_NAMES |
| * |
| * When the code here is changed, man/systemd.net-naming-scheme.xml must be updated too. |
| */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <net/if.h> |
| #include <stdarg.h> |
| #include <unistd.h> |
| #include <linux/if.h> |
| #include <linux/if_arp.h> |
| #include <linux/netdevice.h> |
| #include <linux/pci_regs.h> |
| |
| #include "alloc-util.h" |
| #include "chase-symlinks.h" |
| #include "device-private.h" |
| #include "device-util.h" |
| #include "dirent-util.h" |
| #include "ether-addr-util.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "glyph-util.h" |
| #include "netif-naming-scheme.h" |
| #include "parse-util.h" |
| #include "proc-cmdline.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "strxcpyx.h" |
| #include "udev-builtin.h" |
| |
| #define ONBOARD_14BIT_INDEX_MAX ((1U << 14) - 1) |
| #define ONBOARD_16BIT_INDEX_MAX ((1U << 16) - 1) |
| |
| typedef enum NetNameType { |
| NET_UNDEF, |
| NET_PCI, |
| NET_USB, |
| NET_BCMA, |
| NET_VIRTIO, |
| NET_CCW, |
| NET_VIO, |
| NET_XENVIF, |
| NET_PLATFORM, |
| NET_NETDEVSIM, |
| NET_DEVICETREE, |
| } NetNameType; |
| |
| typedef struct NetNames { |
| NetNameType type; |
| |
| sd_device *pcidev; |
| char pci_slot[ALTIFNAMSIZ]; |
| char pci_path[ALTIFNAMSIZ]; |
| char pci_onboard[ALTIFNAMSIZ]; |
| const char *pci_onboard_label; |
| |
| char usb_ports[ALTIFNAMSIZ]; |
| char bcma_core[ALTIFNAMSIZ]; |
| char ccw_busid[ALTIFNAMSIZ]; |
| char vio_slot[ALTIFNAMSIZ]; |
| char xen_slot[ALTIFNAMSIZ]; |
| char platform_path[ALTIFNAMSIZ]; |
| char netdevsim_path[ALTIFNAMSIZ]; |
| char devicetree_onboard[ALTIFNAMSIZ]; |
| } NetNames; |
| |
| typedef struct LinkInfo { |
| int ifindex; |
| int iflink; |
| int iftype; |
| const char *devtype; |
| const char *phys_port_name; |
| struct hw_addr_data hw_addr; |
| } LinkInfo; |
| |
| /* skip intermediate virtio devices */ |
| static sd_device *skip_virtio(sd_device *dev) { |
| /* there can only ever be one virtio bus per parent device, so we can |
| * safely ignore any virtio buses. see |
| * http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030331.html */ |
| while (dev) { |
| const char *subsystem; |
| |
| if (sd_device_get_subsystem(dev, &subsystem) < 0) |
| break; |
| |
| if (!streq(subsystem, "virtio")) |
| break; |
| |
| if (sd_device_get_parent(dev, &dev) < 0) |
| return NULL; |
| } |
| |
| return dev; |
| } |
| |
| static int get_virtfn_info(sd_device *pcidev, sd_device **ret_physfn_pcidev, char **ret_suffix) { |
| _cleanup_(sd_device_unrefp) sd_device *physfn_pcidev = NULL; |
| const char *syspath, *name; |
| sd_device *child; |
| int r; |
| |
| assert(pcidev); |
| assert(ret_physfn_pcidev); |
| assert(ret_suffix); |
| |
| r = sd_device_get_syspath(pcidev, &syspath); |
| if (r < 0) |
| return r; |
| |
| /* Get physical function's pci device. */ |
| r = sd_device_new_child(&physfn_pcidev, pcidev, "physfn"); |
| if (r < 0) |
| return r; |
| |
| /* Find the virtual function number by finding the right virtfn link. */ |
| FOREACH_DEVICE_CHILD_WITH_SUFFIX(physfn_pcidev, child, name) { |
| const char *n, *s; |
| |
| /* Only accepts e.g. virtfn0, virtfn1, and so on. */ |
| n = startswith(name, "virtfn"); |
| if (isempty(n) || !in_charset(n, DIGITS)) |
| continue; |
| |
| if (sd_device_get_syspath(child, &s) < 0) |
| continue; |
| |
| if (streq(s, syspath)) { |
| char *suffix; |
| |
| suffix = strjoin("v", n); |
| if (!suffix) |
| return -ENOMEM; |
| |
| *ret_physfn_pcidev = sd_device_ref(physfn_pcidev); |
| *ret_suffix = suffix; |
| return 0; |
| } |
| } |
| |
| return -ENOENT; |
| } |
| |
| static bool is_valid_onboard_index(unsigned long idx) { |
| /* Some BIOSes report rubbish indexes that are excessively high (2^24-1 is an index VMware likes to |
| * report for example). Let's define a cut-off where we don't consider the index reliable anymore. We |
| * pick some arbitrary cut-off, which is somewhere beyond the realistic number of physical network |
| * interface a system might have. Ideally the kernel would already filter this crap for us, but it |
| * doesn't currently. The initial cut-off value (2^14-1) was too conservative for s390 PCI which |
| * allows for index values up 2^16-1 which is now enabled with the NAMING_16BIT_INDEX naming flag. */ |
| return idx <= (naming_scheme_has(NAMING_16BIT_INDEX) ? ONBOARD_16BIT_INDEX_MAX : ONBOARD_14BIT_INDEX_MAX); |
| } |
| |
| /* retrieve on-board index number and label from firmware */ |
| static int dev_pci_onboard(sd_device *dev, const LinkInfo *info, NetNames *names) { |
| unsigned long idx, dev_port = 0; |
| const char *attr; |
| size_t l; |
| char *s; |
| int r; |
| |
| assert(dev); |
| assert(info); |
| assert(names); |
| |
| /* ACPI _DSM — device specific method for naming a PCI or PCI Express device */ |
| if (sd_device_get_sysattr_value(names->pcidev, "acpi_index", &attr) >= 0) |
| log_device_debug(names->pcidev, "acpi_index=%s", attr); |
| else { |
| /* SMBIOS type 41 — Onboard Devices Extended Information */ |
| r = sd_device_get_sysattr_value(names->pcidev, "index", &attr); |
| if (r < 0) |
| return r; |
| log_device_debug(names->pcidev, "index=%s", attr); |
| } |
| |
| r = safe_atolu(attr, &idx); |
| if (r < 0) |
| return log_device_debug_errno(names->pcidev, r, |
| "Failed to parse onboard index \"%s\": %m", attr); |
| if (idx == 0 && !naming_scheme_has(NAMING_ZERO_ACPI_INDEX)) |
| return log_device_debug_errno(names->pcidev, SYNTHETIC_ERRNO(EINVAL), |
| "Naming scheme does not allow onboard index==0."); |
| if (!is_valid_onboard_index(idx)) |
| return log_device_debug_errno(names->pcidev, SYNTHETIC_ERRNO(ENOENT), |
| "Not a valid onboard index: %lu", idx); |
| |
| /* kernel provided port index for multiple ports on a single PCI function */ |
| if (sd_device_get_sysattr_value(dev, "dev_port", &attr) >= 0) { |
| r = safe_atolu_full(attr, 10, &dev_port); |
| if (r < 0) |
| log_device_debug_errno(dev, r, "Failed to parse dev_port, ignoring: %m"); |
| log_device_debug(dev, "dev_port=%lu", dev_port); |
| } |
| |
| s = names->pci_onboard; |
| l = sizeof(names->pci_onboard); |
| l = strpcpyf(&s, l, "o%lu", idx); |
| if (!isempty(info->phys_port_name)) |
| /* kernel provided front panel port name for multiple port PCI device */ |
| l = strpcpyf(&s, l, "n%s", info->phys_port_name); |
| else if (dev_port > 0) |
| l = strpcpyf(&s, l, "d%lu", dev_port); |
| if (l == 0) |
| names->pci_onboard[0] = '\0'; |
| log_device_debug(dev, "Onboard index identifier: index=%lu phys_port=%s dev_port=%lu %s %s", |
| idx, strempty(info->phys_port_name), dev_port, |
| special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), empty_to_na(names->pci_onboard)); |
| |
| if (sd_device_get_sysattr_value(names->pcidev, "label", &names->pci_onboard_label) >= 0) |
| log_device_debug(dev, "Onboard label from PCI device: %s", names->pci_onboard_label); |
| else |
| names->pci_onboard_label = NULL; |
| |
| return 0; |
| } |
| |
| /* read the 256 bytes PCI configuration space to check the multi-function bit */ |
| static int is_pci_multifunction(sd_device *dev) { |
| _cleanup_free_ uint8_t *config = NULL; |
| const char *filename, *syspath; |
| size_t len; |
| int r; |
| |
| r = sd_device_get_syspath(dev, &syspath); |
| if (r < 0) |
| return r; |
| |
| filename = strjoina(syspath, "/config"); |
| r = read_virtual_file(filename, PCI_HEADER_TYPE + 1, (char **) &config, &len); |
| if (r < 0) |
| return r; |
| if (len < PCI_HEADER_TYPE + 1) |
| return -EINVAL; |
| |
| #ifndef PCI_HEADER_TYPE_MULTIFUNC |
| #define PCI_HEADER_TYPE_MULTIFUNC 0x80 |
| #endif |
| |
| /* bit 0-6 header type, bit 7 multi/single function device */ |
| return config[PCI_HEADER_TYPE] & PCI_HEADER_TYPE_MULTIFUNC; |
| } |
| |
| static bool is_pci_ari_enabled(sd_device *dev) { |
| const char *a; |
| |
| if (sd_device_get_sysattr_value(dev, "ari_enabled", &a) < 0) |
| return false; |
| |
| return streq(a, "1"); |
| } |
| |
| static bool is_pci_bridge(sd_device *dev) { |
| const char *v, *p; |
| |
| if (sd_device_get_sysattr_value(dev, "modalias", &v) < 0) |
| return false; |
| |
| if (!startswith(v, "pci:")) |
| return false; |
| |
| p = strrchr(v, 's'); |
| if (!p) |
| return false; |
| if (p[1] != 'c') |
| return false; |
| |
| /* PCI device subclass 04 corresponds to PCI bridge */ |
| bool b = strneq(p + 2, "04", 2); |
| if (b) |
| log_device_debug(dev, "Device is a PCI bridge."); |
| return b; |
| } |
| |
| static int parse_hotplug_slot_from_function_id(sd_device *dev, int slots_dirfd, uint32_t *ret) { |
| uint64_t function_id; |
| char filename[NAME_MAX+1]; |
| const char *attr; |
| int r; |
| |
| /* The <sysname>/function_id attribute is unique to the s390 PCI driver. If present, we know |
| * that the slot's directory name for this device is /sys/bus/pci/XXXXXXXX/ where XXXXXXXX is |
| * the fixed length 8 hexadecimal character string representation of function_id. Therefore we |
| * can short cut here and just check for the existence of the slot directory. As this directory |
| * has to exist, we're emitting a debug message for the unlikely case it's not found. Note that |
| * the domain part doesn't belong to the slot name here because there's a 1-to-1 relationship |
| * between PCI function and its hotplug slot. */ |
| |
| assert(dev); |
| assert(slots_dirfd >= 0); |
| assert(ret); |
| |
| if (!naming_scheme_has(NAMING_SLOT_FUNCTION_ID)) |
| return 0; |
| |
| if (sd_device_get_sysattr_value(dev, "function_id", &attr) < 0) |
| return 0; |
| |
| r = safe_atou64(attr, &function_id); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "Failed to parse function_id, ignoring: %s", attr); |
| |
| if (function_id <= 0 || function_id > UINT32_MAX) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EINVAL), |
| "Invalid function id (0x%"PRIx64"), ignoring.", |
| function_id); |
| |
| if (!snprintf_ok(filename, sizeof(filename), "%08"PRIx64, function_id)) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(ENAMETOOLONG), |
| "PCI slot path is too long, ignoring."); |
| |
| if (faccessat(slots_dirfd, filename, F_OK, 0) < 0) |
| return log_device_debug_errno(dev, errno, "Cannot access %s under pci slots, ignoring: %m", filename); |
| |
| *ret = (uint32_t) function_id; |
| return 1; |
| } |
| |
| static int dev_pci_slot(sd_device *dev, const LinkInfo *info, NetNames *names) { |
| const char *sysname, *attr; |
| _cleanup_(sd_device_unrefp) sd_device *pci = NULL; |
| _cleanup_closedir_ DIR *dir = NULL; |
| unsigned domain, bus, slot, func; |
| sd_device *hotplug_slot_dev; |
| unsigned long dev_port = 0; |
| uint32_t hotplug_slot = 0; |
| size_t l; |
| char *s; |
| int r; |
| |
| assert(dev); |
| assert(info); |
| assert(names); |
| |
| r = sd_device_get_sysname(names->pcidev, &sysname); |
| if (r < 0) |
| return log_device_debug_errno(names->pcidev, r, "Failed to get sysname: %m"); |
| |
| r = sscanf(sysname, "%x:%x:%x.%u", &domain, &bus, &slot, &func); |
| log_device_debug(dev, "Parsing slot information from PCI device sysname \"%s\": %s", |
| sysname, r == 4 ? "success" : "failure"); |
| if (r != 4) |
| return -ENOENT; |
| |
| if (naming_scheme_has(NAMING_NPAR_ARI) && |
| is_pci_ari_enabled(names->pcidev)) |
| /* ARI devices support up to 256 functions on a single device ("slot"), and interpret the |
| * traditional 5-bit slot and 3-bit function number as a single 8-bit function number, |
| * where the slot makes up the upper 5 bits. */ |
| func += slot * 8; |
| |
| /* kernel provided port index for multiple ports on a single PCI function */ |
| if (sd_device_get_sysattr_value(dev, "dev_port", &attr) >= 0) { |
| log_device_debug(dev, "dev_port=%s", attr); |
| |
| r = safe_atolu_full(attr, 10, &dev_port); |
| if (r < 0) |
| log_device_debug_errno(dev, r, "Failed to parse attribute dev_port, ignoring: %m"); |
| |
| /* With older kernels IP-over-InfiniBand network interfaces sometimes erroneously |
| * provide the port number in the 'dev_id' sysfs attribute instead of 'dev_port', |
| * which thus stays initialized as 0. */ |
| if (dev_port == 0 && |
| info->iftype == ARPHRD_INFINIBAND && |
| sd_device_get_sysattr_value(dev, "dev_id", &attr) >= 0) { |
| log_device_debug(dev, "dev_id=%s", attr); |
| |
| r = safe_atolu_full(attr, 10, &dev_port); |
| if (r < 0) |
| log_device_debug_errno(dev, r, "Failed to parse attribute dev_id, ignoring: %m"); |
| } |
| } |
| |
| /* 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%u", domain); |
| l = strpcpyf(&s, l, "p%us%u", bus, slot); |
| if (func > 0 || is_pci_multifunction(names->pcidev) > 0) |
| l = strpcpyf(&s, l, "f%u", func); |
| if (!isempty(info->phys_port_name)) |
| /* kernel provided front panel port name for multi-port PCI device */ |
| l = strpcpyf(&s, l, "n%s", info->phys_port_name); |
| else if (dev_port > 0) |
| l = strpcpyf(&s, l, "d%lu", dev_port); |
| if (l == 0) |
| names->pci_path[0] = '\0'; |
| |
| log_device_debug(dev, "PCI path identifier: domain=%u bus=%u slot=%u func=%u phys_port=%s dev_port=%lu %s %s", |
| domain, bus, slot, func, strempty(info->phys_port_name), dev_port, |
| special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), empty_to_na(names->pci_path)); |
| |
| /* ACPI _SUN — slot user number */ |
| r = sd_device_new_from_subsystem_sysname(&pci, "subsystem", "pci"); |
| if (r < 0) |
| return log_debug_errno(r, "sd_device_new_from_subsystem_sysname() failed: %m"); |
| |
| r = device_opendir(pci, "slots", &dir); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "Cannot access 'slots' subdirectory: %m"); |
| |
| hotplug_slot_dev = names->pcidev; |
| while (hotplug_slot_dev) { |
| r = parse_hotplug_slot_from_function_id(hotplug_slot_dev, dirfd(dir), &hotplug_slot); |
| if (r < 0) |
| return 0; |
| if (r > 0) { |
| domain = 0; /* See comments in parse_hotplug_slot_from_function_id(). */ |
| break; |
| } |
| |
| r = sd_device_get_sysname(hotplug_slot_dev, &sysname); |
| if (r < 0) |
| return log_device_debug_errno(hotplug_slot_dev, r, "Failed to get sysname: %m"); |
| |
| FOREACH_DIRENT_ALL(de, dir, break) { |
| _cleanup_free_ char *path = NULL; |
| const char *address; |
| uint32_t i; |
| |
| if (dot_or_dot_dot(de->d_name)) |
| continue; |
| |
| r = safe_atou32(de->d_name, &i); |
| if (r < 0 || i <= 0) |
| continue; |
| |
| path = path_join("slots", de->d_name, "address"); |
| if (!path) |
| return -ENOMEM; |
| |
| if (sd_device_get_sysattr_value(pci, path, &address) < 0) |
| continue; |
| |
| /* match slot address with device by stripping the function */ |
| if (!startswith(sysname, address)) |
| continue; |
| |
| hotplug_slot = i; |
| |
| /* We found the match between PCI device and slot. However, we won't use the slot |
| * index if the device is a PCI bridge, because it can have other child devices that |
| * will try to claim the same index and that would create name collision. */ |
| if (naming_scheme_has(NAMING_BRIDGE_NO_SLOT) && is_pci_bridge(hotplug_slot_dev)) { |
| if (naming_scheme_has(NAMING_BRIDGE_MULTIFUNCTION_SLOT) && is_pci_multifunction(names->pcidev) <= 0) { |
| log_device_debug(dev, |
| "Not using slot information because the PCI device associated with " |
| "the hotplug slot is a bridge and the PCI device has a single function."); |
| return 0; |
| } |
| |
| if (!naming_scheme_has(NAMING_BRIDGE_MULTIFUNCTION_SLOT)) { |
| log_device_debug(dev, "Not using slot information because the PCI device is a bridge."); |
| return 0; |
| } |
| } |
| |
| break; |
| } |
| if (hotplug_slot > 0) |
| break; |
| if (sd_device_get_parent_with_subsystem_devtype(hotplug_slot_dev, "pci", NULL, &hotplug_slot_dev) < 0) |
| break; |
| rewinddir(dir); |
| } |
| |
| if (hotplug_slot > 0) { |
| s = names->pci_slot; |
| l = sizeof(names->pci_slot); |
| if (domain > 0) |
| l = strpcpyf(&s, l, "P%u", domain); |
| l = strpcpyf(&s, l, "s%"PRIu32, hotplug_slot); |
| if (func > 0 || is_pci_multifunction(names->pcidev) > 0) |
| l = strpcpyf(&s, l, "f%u", func); |
| if (!isempty(info->phys_port_name)) |
| l = strpcpyf(&s, l, "n%s", info->phys_port_name); |
| else if (dev_port > 0) |
| l = strpcpyf(&s, l, "d%lu", dev_port); |
| if (l == 0) |
| names->pci_slot[0] = '\0'; |
| |
| log_device_debug(dev, "Slot identifier: domain=%u slot=%"PRIu32" func=%u phys_port=%s dev_port=%lu %s %s", |
| domain, hotplug_slot, func, strempty(info->phys_port_name), dev_port, |
| special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), empty_to_na(names->pci_slot)); |
| } |
| |
| return 0; |
| } |
| |
| static int names_vio(sd_device *dev, NetNames *names) { |
| sd_device *parent; |
| unsigned busid, slotid, ethid; |
| const char *syspath, *subsystem; |
| int r; |
| |
| /* check if our direct parent is a VIO device with no other bus in-between */ |
| r = sd_device_get_parent(dev, &parent); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_parent() failed: %m"); |
| |
| r = sd_device_get_subsystem(parent, &subsystem); |
| if (r < 0) |
| return log_device_debug_errno(parent, r, "sd_device_get_subsystem() failed: %m"); |
| if (!streq("vio", subsystem)) |
| return -ENOENT; |
| log_device_debug(dev, "Parent device is in the vio subsystem."); |
| |
| /* The devices' $DEVPATH number is tied to (virtual) hardware (slot id |
| * selected in the HMC), thus this provides a reliable naming (e.g. |
| * "/devices/vio/30000002/net/eth1"); we ignore the bus number, as |
| * there should only ever be one bus, and then remove leading zeros. */ |
| r = sd_device_get_syspath(dev, &syspath); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_syspath() failed: %m"); |
| |
| r = sscanf(syspath, "/sys/devices/vio/%4x%4x/net/eth%u", &busid, &slotid, ðid); |
| log_device_debug(dev, "Parsing vio slot information from syspath \"%s\": %s", |
| syspath, r == 3 ? "success" : "failure"); |
| if (r != 3) |
| return -EINVAL; |
| |
| xsprintf(names->vio_slot, "v%u", slotid); |
| names->type = NET_VIO; |
| log_device_debug(dev, "Vio slot identifier: slotid=%u %s %s", |
| slotid, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), names->vio_slot); |
| return 0; |
| } |
| |
| #define PLATFORM_TEST "/sys/devices/platform/vvvvPPPP" |
| #define PLATFORM_PATTERN4 "/sys/devices/platform/%4s%4x:%2x/net/eth%u" |
| #define PLATFORM_PATTERN3 "/sys/devices/platform/%3s%4x:%2x/net/eth%u" |
| |
| static int names_platform(sd_device *dev, NetNames *names, bool test) { |
| sd_device *parent; |
| char vendor[5]; |
| unsigned model, instance, ethid; |
| const char *syspath, *pattern, *validchars, *subsystem; |
| int r; |
| |
| /* check if our direct parent is a platform device with no other bus in-between */ |
| r = sd_device_get_parent(dev, &parent); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_parent() failed: %m"); |
| |
| r = sd_device_get_subsystem(parent, &subsystem); |
| if (r < 0) |
| return log_device_debug_errno(parent, r, "sd_device_get_subsystem() failed: %m"); |
| |
| if (!streq("platform", subsystem)) |
| return -ENOENT; |
| log_device_debug(dev, "Parent device is in the platform subsystem."); |
| |
| r = sd_device_get_syspath(dev, &syspath); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_syspath() failed: %m"); |
| |
| /* syspath is too short, to have a valid ACPI instance */ |
| if (strlen(syspath) < STRLEN(PLATFORM_TEST) + 1) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EINVAL), |
| "Syspath \"%s\" is too short for a valid ACPI instance.", |
| syspath); |
| |
| /* Vendor ID can be either PNP ID (3 chars A-Z) or ACPI ID (4 chars A-Z and numerals) */ |
| if (syspath[STRLEN(PLATFORM_TEST)] == ':') { |
| pattern = PLATFORM_PATTERN4; |
| validchars = UPPERCASE_LETTERS DIGITS; |
| } else { |
| pattern = PLATFORM_PATTERN3; |
| validchars = UPPERCASE_LETTERS; |
| } |
| |
| /* Platform devices are named after ACPI table match, and instance id |
| * eg. "/sys/devices/platform/HISI00C2:00"); |
| * The Vendor (3 or 4 char), followed by hexadecimal model number : instance id. */ |
| |
| DISABLE_WARNING_FORMAT_NONLITERAL; |
| r = sscanf(syspath, pattern, vendor, &model, &instance, ðid); |
| REENABLE_WARNING; |
| log_device_debug(dev, "Parsing platform device information from syspath \"%s\": %s", |
| syspath, r == 4 ? "success" : "failure"); |
| if (r != 4) |
| return -EINVAL; |
| |
| if (!in_charset(vendor, validchars)) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(ENOENT), |
| "Platform vendor contains invalid characters: %s", vendor); |
| |
| ascii_strlower(vendor); |
| |
| xsprintf(names->platform_path, "a%s%xi%u", vendor, model, instance); |
| names->type = NET_PLATFORM; |
| log_device_debug(dev, "Platform identifier: vendor=%s model=%u instance=%u %s %s", |
| vendor, model, instance, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), names->platform_path); |
| return 0; |
| } |
| |
| static int dev_devicetree_onboard(sd_device *dev, NetNames *names) { |
| _cleanup_(sd_device_unrefp) sd_device *aliases_dev = NULL, *ofnode_dev = NULL, *devicetree_dev = NULL; |
| const char *alias, *ofnode_path, *ofnode_syspath, *devicetree_syspath; |
| sd_device *parent; |
| int r; |
| |
| if (!naming_scheme_has(NAMING_DEVICETREE_ALIASES)) |
| return 0; |
| |
| /* check if our direct parent has an of_node */ |
| r = sd_device_get_parent(dev, &parent); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_new_child(&ofnode_dev, parent, "of_node"); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_get_syspath(ofnode_dev, &ofnode_syspath); |
| if (r < 0) |
| return r; |
| |
| /* /proc/device-tree should be a symlink to /sys/firmware/devicetree/base. */ |
| r = sd_device_new_from_path(&devicetree_dev, "/proc/device-tree"); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_get_syspath(devicetree_dev, &devicetree_syspath); |
| if (r < 0) |
| return r; |
| |
| /* |
| * Example paths: |
| * devicetree_syspath = /sys/firmware/devicetree/base |
| * ofnode_syspath = /sys/firmware/devicetree/base/soc/ethernet@deadbeef |
| * ofnode_path = soc/ethernet@deadbeef |
| */ |
| ofnode_path = path_startswith(ofnode_syspath, devicetree_syspath); |
| if (!ofnode_path) |
| return -ENOENT; |
| |
| /* Get back our leading / to match the contents of the aliases */ |
| ofnode_path--; |
| assert(path_is_absolute(ofnode_path)); |
| |
| r = sd_device_new_child(&aliases_dev, devicetree_dev, "aliases"); |
| if (r < 0) |
| return r; |
| |
| FOREACH_DEVICE_SYSATTR(aliases_dev, alias) { |
| const char *alias_path, *alias_index, *conflict; |
| unsigned i; |
| |
| alias_index = startswith(alias, "ethernet"); |
| if (!alias_index) |
| continue; |
| |
| if (sd_device_get_sysattr_value(aliases_dev, alias, &alias_path) < 0) |
| continue; |
| |
| if (!path_equal(ofnode_path, alias_path)) |
| continue; |
| |
| /* If there's no index, we default to 0... */ |
| if (isempty(alias_index)) { |
| i = 0; |
| conflict = "ethernet0"; |
| } else { |
| r = safe_atou(alias_index, &i); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, |
| "Could not get index of alias %s: %m", alias); |
| conflict = "ethernet"; |
| } |
| |
| /* ...but make sure we don't have an alias conflict */ |
| if (i == 0 && sd_device_get_sysattr_value(aliases_dev, conflict, NULL) >= 0) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EEXIST), |
| "Ethernet alias conflict: ethernet and ethernet0 both exist"); |
| |
| xsprintf(names->devicetree_onboard, "d%u", i); |
| names->type = NET_DEVICETREE; |
| return 0; |
| } |
| |
| return -ENOENT; |
| } |
| |
| static int names_pci(sd_device *dev, const LinkInfo *info, NetNames *names) { |
| _cleanup_(sd_device_unrefp) sd_device *physfn_pcidev = NULL; |
| _cleanup_free_ char *virtfn_suffix = NULL; |
| sd_device *parent; |
| const char *subsystem; |
| int r; |
| |
| assert(dev); |
| assert(info); |
| assert(names); |
| |
| r = sd_device_get_parent(dev, &parent); |
| if (r < 0) |
| return r; |
| /* skip virtio subsystem if present */ |
| parent = skip_virtio(parent); |
| |
| if (!parent) |
| return -ENOENT; |
| |
| /* check if our direct parent is a PCI device with no other bus in-between */ |
| if (sd_device_get_subsystem(parent, &subsystem) >= 0 && |
| streq("pci", subsystem)) { |
| names->type = NET_PCI; |
| names->pcidev = parent; |
| } else { |
| r = sd_device_get_parent_with_subsystem_devtype(dev, "pci", NULL, &names->pcidev); |
| if (r < 0) |
| return r; |
| } |
| |
| if (naming_scheme_has(NAMING_SR_IOV_V) && |
| get_virtfn_info(names->pcidev, &physfn_pcidev, &virtfn_suffix) >= 0) { |
| NetNames vf_names = {}; |
| |
| /* If this is an SR-IOV virtual device, get base name using physical device and add virtfn suffix. */ |
| vf_names.pcidev = physfn_pcidev; |
| dev_pci_onboard(dev, info, &vf_names); |
| dev_pci_slot(dev, info, &vf_names); |
| |
| if (vf_names.pci_onboard[0]) |
| if (strlen(vf_names.pci_onboard) + strlen(virtfn_suffix) < sizeof(names->pci_onboard)) |
| strscpyl(names->pci_onboard, sizeof(names->pci_onboard), |
| vf_names.pci_onboard, virtfn_suffix, NULL); |
| if (vf_names.pci_slot[0]) |
| if (strlen(vf_names.pci_slot) + strlen(virtfn_suffix) < sizeof(names->pci_slot)) |
| strscpyl(names->pci_slot, sizeof(names->pci_slot), |
| vf_names.pci_slot, virtfn_suffix, NULL); |
| if (vf_names.pci_path[0]) |
| if (strlen(vf_names.pci_path) + strlen(virtfn_suffix) < sizeof(names->pci_path)) |
| strscpyl(names->pci_path, sizeof(names->pci_path), |
| vf_names.pci_path, virtfn_suffix, NULL); |
| } else { |
| dev_pci_onboard(dev, info, names); |
| dev_pci_slot(dev, info, names); |
| } |
| |
| return 0; |
| } |
| |
| static int names_usb(sd_device *dev, NetNames *names) { |
| sd_device *usbdev; |
| char name[256], *ports, *config, *interf, *s; |
| const char *sysname; |
| size_t l; |
| int r; |
| |
| assert(dev); |
| assert(names); |
| |
| r = sd_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface", &usbdev); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_parent_with_subsystem_devtype() failed: %m"); |
| |
| r = sd_device_get_sysname(usbdev, &sysname); |
| if (r < 0) |
| return log_device_debug_errno(usbdev, r, "sd_device_get_sysname() failed: %m"); |
| |
| /* get USB port number chain, configuration, interface */ |
| strscpy(name, sizeof(name), sysname); |
| s = strchr(name, '-'); |
| if (!s) |
| return log_device_debug_errno(usbdev, SYNTHETIC_ERRNO(EINVAL), |
| "sysname \"%s\" does not have '-' in the expected place.", sysname); |
| ports = s+1; |
| |
| s = strchr(ports, ':'); |
| if (!s) |
| return log_device_debug_errno(usbdev, SYNTHETIC_ERRNO(EINVAL), |
| "sysname \"%s\" does not have ':' in the expected place.", sysname); |
| s[0] = '\0'; |
| config = s+1; |
| |
| s = strchr(config, '.'); |
| if (!s) |
| return log_device_debug_errno(usbdev, SYNTHETIC_ERRNO(EINVAL), |
| "sysname \"%s\" does not have '.' in the expected place.", sysname); |
| s[0] = '\0'; |
| interf = s+1; |
| |
| /* prefix every port number in the chain with "u" */ |
| s = ports; |
| while ((s = strchr(s, '.'))) |
| s[0] = 'u'; |
| s = names->usb_ports; |
| l = strpcpyl(&s, sizeof(names->usb_ports), "u", ports, NULL); |
| |
| /* append USB config number, suppress the common config == 1 */ |
| if (!streq(config, "1")) |
| l = strpcpyl(&s, sizeof(names->usb_ports), "c", config, NULL); |
| |
| /* append USB interface number, suppress the interface == 0 */ |
| if (!streq(interf, "0")) |
| l = strpcpyl(&s, sizeof(names->usb_ports), "i", interf, NULL); |
| if (l == 0) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(ENAMETOOLONG), |
| "Generated USB name would be too long."); |
| log_device_debug(dev, "USB name identifier: ports=%.*s config=%s interface=%s %s %s", |
| (int) strlen(ports), sysname + (ports - name), config, interf, |
| special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), names->usb_ports); |
| names->type = NET_USB; |
| return 0; |
| } |
| |
| static int names_bcma(sd_device *dev, NetNames *names) { |
| sd_device *bcmadev; |
| unsigned core; |
| const char *sysname; |
| int r; |
| |
| assert(dev); |
| assert(names); |
| |
| r = sd_device_get_parent_with_subsystem_devtype(dev, "bcma", NULL, &bcmadev); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_parent_with_subsystem_devtype() failed: %m"); |
| |
| r = sd_device_get_sysname(bcmadev, &sysname); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_sysname() failed: %m"); |
| |
| /* bus num:core num */ |
| r = sscanf(sysname, "bcma%*u:%u", &core); |
| log_device_debug(dev, "Parsing bcma device information from sysname \"%s\": %s", |
| sysname, r == 1 ? "success" : "failure"); |
| if (r != 1) |
| return -EINVAL; |
| /* suppress the common core == 0 */ |
| if (core > 0) |
| xsprintf(names->bcma_core, "b%u", core); |
| |
| names->type = NET_BCMA; |
| log_device_debug(dev, "BCMA core identifier: core=%u %s \"%s\"", |
| core, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), names->bcma_core); |
| return 0; |
| } |
| |
| static int names_ccw(sd_device *dev, NetNames *names) { |
| sd_device *cdev; |
| const char *bus_id, *subsys; |
| size_t bus_id_start, bus_id_len; |
| int r; |
| |
| assert(dev); |
| assert(names); |
| |
| /* Retrieve the associated CCW device */ |
| r = sd_device_get_parent(dev, &cdev); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "sd_device_get_parent() failed: %m"); |
| |
| /* skip virtio subsystem if present */ |
| cdev = skip_virtio(cdev); |
| if (!cdev) |
| return -ENOENT; |
| |
| r = sd_device_get_subsystem(cdev, &subsys); |
| if (r < 0) |
| return log_device_debug_errno(cdev, r, "sd_device_get_subsystem() failed: %m"); |
| |
| /* Network devices are either single or grouped CCW devices */ |
| if (!STR_IN_SET(subsys, "ccwgroup", "ccw")) |
| return -ENOENT; |
| log_device_debug(dev, "Device is CCW."); |
| |
| /* Retrieve bus-ID of the CCW device. The bus-ID uniquely |
| * identifies the network device on the Linux on System z channel |
| * subsystem. Note that the bus-ID contains lowercase characters. |
| */ |
| r = sd_device_get_sysname(cdev, &bus_id); |
| if (r < 0) |
| return log_device_debug_errno(cdev, r, "Failed to get sysname: %m"); |
| |
| /* Check the length of the bus-ID. Rely on the fact that the kernel provides a correct bus-ID; |
| * alternatively, improve this check and parse and verify each bus-ID part... |
| */ |
| bus_id_len = strlen(bus_id); |
| if (!IN_SET(bus_id_len, 8, 9)) |
| return log_device_debug_errno(cdev, SYNTHETIC_ERRNO(EINVAL), |
| "Invalid bus_id: %s", bus_id); |
| |
| /* Strip leading zeros from the bus id for aesthetic purposes. This |
| * keeps the ccw names stable, yet much shorter in general case of |
| * bus_id 0.0.0600 -> 600. This is similar to e.g. how PCI domain is |
| * not prepended when it is zero. Preserve the last 0 for 0.0.0000. |
| */ |
| bus_id_start = strspn(bus_id, ".0"); |
| bus_id += bus_id_start < bus_id_len ? bus_id_start : bus_id_len - 1; |
| |
| /* Store the CCW bus-ID for use as network device name */ |
| if (!snprintf_ok(names->ccw_busid, sizeof(names->ccw_busid), "c%s", bus_id)) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(ENAMETOOLONG), |
| "Generated CCW name would be too long."); |
| names->type = NET_CCW; |
| log_device_debug(dev, "CCW identifier: ccw_busid=%s %s \"%s\"", |
| bus_id, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), names->ccw_busid); |
| return 0; |
| } |
| |
| static int names_mac(sd_device *dev, const LinkInfo *info) { |
| const char *s; |
| unsigned i; |
| int r; |
| |
| assert(dev); |
| assert(info); |
| |
| /* The persistent part of a hardware address of an InfiniBand NIC is 8 bytes long. We cannot |
| * fit this much in an iface name. |
| * TODO: but it can be used as alternative names?? */ |
| if (info->iftype == ARPHRD_INFINIBAND) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EOPNOTSUPP), |
| "Not generating MAC name for infiniband device."); |
| if (info->hw_addr.length != 6) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EOPNOTSUPP), |
| "Not generating MAC name for device with MAC address of length %zu.", |
| info->hw_addr.length); |
| |
| /* check for NET_ADDR_PERM, skip random MAC addresses */ |
| r = sd_device_get_sysattr_value(dev, "addr_assign_type", &s); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "Failed to read addr_assign_type: %m"); |
| r = safe_atou(s, &i); |
| if (r < 0) |
| return log_device_debug_errno(dev, r, "Failed to parse addr_assign_type: %m"); |
| if (i != NET_ADDR_PERM) |
| return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EINVAL), |
| "addr_assign_type=%u, MAC address is not permanent.", i); |
| return 0; |
| } |
| |
| static int names_netdevsim(sd_device *dev, const LinkInfo *info, NetNames *names) { |
| sd_device *netdevsimdev; |
| const char *sysname; |
| unsigned addr; |
| int r; |
| |
| if (!naming_scheme_has(NAMING_NETDEVSIM)) |
| return 0; |
| |
| assert(dev); |
| assert(info); |
| assert(names); |
| |
| if (isempty(info->phys_port_name)) |
| return -EINVAL; |
| |
| r = sd_device_get_parent_with_subsystem_devtype(dev, "netdevsim", NULL, &netdevsimdev); |
| if (r < 0) |
| return r; |
| r = sd_device_get_sysname(netdevsimdev, &sysname); |
| if (r < 0) |
| return r; |
| |
| if (sscanf(sysname, "netdevsim%u", &addr) != 1) |
| return -EINVAL; |
| |
| if (!snprintf_ok(names->netdevsim_path, sizeof(names->netdevsim_path), "i%un%s", addr, info->phys_port_name)) |
| return -ENOBUFS; |
| |
| names->type = NET_NETDEVSIM; |
| |
| return 0; |
| } |
| |
| static int names_xen(sd_device *dev, NetNames *names) { |
| sd_device *parent; |
| unsigned id; |
| const char *syspath, *subsystem, *p, *p2; |
| int r; |
| |
| assert(dev); |
| assert(names); |
| |
| if (!naming_scheme_has(NAMING_XEN_VIF)) |
| return 0; |
| |
| /* check if our direct parent is a Xen VIF device with no other bus in-between */ |
| r = sd_device_get_parent(dev, &parent); |
| if (r < 0) |
| return r; |
| |
| /* Do an exact-match on subsystem "xen". This will miss on "xen-backend" on |
| * purpose as the VIFs on the backend (dom0) have their own naming scheme |
| * which we don't want to affect |
| */ |
| r = sd_device_get_subsystem(parent, &subsystem); |
| if (r < 0) |
| return r; |
| if (!streq("xen", subsystem)) |
| return -ENOENT; |
| |
| /* Use the vif-n name to extract "n" */ |
| r = sd_device_get_syspath(dev, &syspath); |
| if (r < 0) |
| return r; |
| |
| p = path_startswith(syspath, "/sys/devices/"); |
| if (!p) |
| return -ENOENT; |
| p = startswith(p, "vif-"); |
| if (!p) |
| return -ENOENT; |
| p2 = strchr(p, '/'); |
| if (!p2) |
| return -ENOENT; |
| p = strndupa_safe(p, p2 - p); |
| if (!p) |
| return -ENOENT; |
| r = safe_atou_full(p, SAFE_ATO_REFUSE_PLUS_MINUS | SAFE_ATO_REFUSE_LEADING_ZERO | |
| SAFE_ATO_REFUSE_LEADING_WHITESPACE | 10, &id); |
| if (r < 0) |
| return r; |
| xsprintf(names->xen_slot, "X%u", id); |
| names->type = NET_XENVIF; |
| return 0; |
| } |
| |
| /* IEEE Organizationally Unique Identifier vendor string */ |
| static int ieee_oui(sd_device *dev, const LinkInfo *info, bool test) { |
| char str[32]; |
| |
| assert(dev); |
| assert(info); |
| |
| if (info->hw_addr.length != 6) |
| return -EOPNOTSUPP; |
| |
| /* skip commonly misused 00:00:00 (Xerox) prefix */ |
| if (info->hw_addr.bytes[0] == 0 && |
| info->hw_addr.bytes[1] == 0 && |
| info->hw_addr.bytes[2] == 0) |
| return -EINVAL; |
| |
| xsprintf(str, "OUI:%02X%02X%02X%02X%02X%02X", |
| info->hw_addr.bytes[0], |
| info->hw_addr.bytes[1], |
| info->hw_addr.bytes[2], |
| info->hw_addr.bytes[3], |
| info->hw_addr.bytes[4], |
| info->hw_addr.bytes[5]); |
| return udev_builtin_hwdb_lookup(dev, NULL, str, NULL, test); |
| } |
| |
| static int get_link_info(sd_device *dev, LinkInfo *info) { |
| const char *s; |
| int r; |
| |
| assert(dev); |
| assert(info); |
| |
| r = sd_device_get_ifindex(dev, &info->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = device_get_sysattr_int(dev, "iflink", &info->iflink); |
| if (r < 0) |
| return r; |
| |
| r = device_get_sysattr_int(dev, "type", &info->iftype); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_get_devtype(dev, &info->devtype); |
| if (r < 0 && r != -ENOENT) |
| return r; |
| |
| (void) sd_device_get_sysattr_value(dev, "phys_port_name", &info->phys_port_name); |
| |
| r = sd_device_get_sysattr_value(dev, "address", &s); |
| if (r < 0 && r != -ENOENT) |
| return r; |
| if (r >= 0) { |
| r = parse_hw_addr(s, &info->hw_addr); |
| if (r < 0) |
| log_device_debug_errno(dev, r, "Failed to parse 'address' sysattr, ignoring: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int builtin_net_id(sd_device *dev, sd_netlink **rtnl, int argc, char *argv[], bool test) { |
| const char *prefix; |
| NetNames names = {}; |
| LinkInfo info = {}; |
| int r; |
| |
| r = get_link_info(dev, &info); |
| if (r < 0) |
| return r; |
| |
| /* skip stacked devices, like VLANs, ... */ |
| if (info.ifindex != info.iflink) |
| return 0; |
| |
| /* handle only ARPHRD_ETHER, ARPHRD_SLIP and ARPHRD_INFINIBAND devices */ |
| switch (info.iftype) { |
| case ARPHRD_ETHER: |
| prefix = "en"; |
| break; |
| case ARPHRD_INFINIBAND: |
| if (naming_scheme_has(NAMING_INFINIBAND)) |
| prefix = "ib"; |
| else |
| return 0; |
| break; |
| case ARPHRD_SLIP: |
| prefix = "sl"; |
| break; |
| default: |
| return 0; |
| } |
| |
| if (streq_ptr("wlan", info.devtype)) |
| prefix = "wl"; |
| else if (streq_ptr("wwan", info.devtype)) |
| prefix = "ww"; |
| |
| udev_builtin_add_property(dev, test, "ID_NET_NAMING_SCHEME", naming_scheme()->name); |
| |
| if (names_mac(dev, &info) >= 0) { |
| char str[ALTIFNAMSIZ]; |
| |
| xsprintf(str, "%sx%s", prefix, HW_ADDR_TO_STR_FULL(&info.hw_addr, HW_ADDR_TO_STRING_NO_COLON)); |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_MAC", str); |
| log_device_debug(dev, "MAC address identifier: hw_addr=%s %s %s", |
| HW_ADDR_TO_STR(&info.hw_addr), |
| special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), str + strlen(prefix)); |
| |
| ieee_oui(dev, &info, test); |
| } |
| |
| /* get devicetree aliases; only ethernet supported for now */ |
| if (streq(prefix, "en") && dev_devicetree_onboard(dev, &names) >= 0 && |
| names.type == NET_DEVICETREE) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.devicetree_onboard)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str); |
| } |
| |
| /* get path names for Linux on System z network devices */ |
| if (names_ccw(dev, &names) >= 0 && names.type == NET_CCW) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.ccw_busid)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| return 0; |
| } |
| |
| /* get ibmveth/ibmvnic slot-based names. */ |
| if (names_vio(dev, &names) >= 0 && names.type == NET_VIO) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.vio_slot)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| return 0; |
| } |
| |
| /* get ACPI path names for ARM64 platform devices */ |
| if (names_platform(dev, &names, test) >= 0 && names.type == NET_PLATFORM) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.platform_path)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| return 0; |
| } |
| |
| /* get netdevsim path names */ |
| if (names_netdevsim(dev, &info, &names) >= 0 && names.type == NET_NETDEVSIM) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.netdevsim_path)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| |
| return 0; |
| } |
| |
| /* get xen vif "slot" based names. */ |
| if (names_xen(dev, &names) >= 0 && names.type == NET_XENVIF) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.xen_slot)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| return 0; |
| } |
| |
| /* get PCI based path names */ |
| r = names_pci(dev, &info, &names); |
| if (r < 0) { |
| /* |
| * check for usb devices that are not off pci interfaces to |
| * support various on-chip asics that have usb ports |
| */ |
| if (r == -ENOENT && |
| naming_scheme_has(NAMING_USB_HOST) && |
| names_usb(dev, &names) >= 0 && names.type == NET_USB) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.usb_ports)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| } |
| |
| return 0; |
| } |
| |
| /* plain PCI device */ |
| if (names.type == NET_PCI) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (names.pci_onboard[0] && |
| snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_onboard)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str); |
| |
| if (names.pci_onboard_label && |
| snprintf_ok(str, sizeof str, "%s%s", |
| naming_scheme_has(NAMING_LABEL_NOPREFIX) ? "" : prefix, |
| names.pci_onboard_label)) |
| udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", str); |
| |
| if (names.pci_path[0] && |
| snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_path)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| |
| if (names.pci_slot[0] && |
| snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_slot)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| return 0; |
| } |
| |
| /* USB device */ |
| if (names_usb(dev, &names) >= 0 && names.type == NET_USB) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (names.pci_path[0] && |
| snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.usb_ports)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| |
| if (names.pci_slot[0] && |
| snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_slot, names.usb_ports)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| return 0; |
| } |
| |
| /* Broadcom bus */ |
| if (names_bcma(dev, &names) >= 0 && names.type == NET_BCMA) { |
| char str[ALTIFNAMSIZ]; |
| |
| if (names.pci_path[0] && |
| snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.bcma_core)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| |
| if (names.pci_slot[0] && |
| snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_slot, names.bcma_core)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| static int builtin_net_id_init(void) { |
| /* Load naming scheme here to suppress log messages in workers. */ |
| naming_scheme(); |
| return 0; |
| } |
| |
| const UdevBuiltin udev_builtin_net_id = { |
| .name = "net_id", |
| .cmd = builtin_net_id, |
| .init = builtin_net_id_init, |
| .help = "Network device properties", |
| }; |
