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From 9f59dca3868b1e934a2aac2d811c55ab33cca0eb Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Tue, 17 Dec 2019 11:01:35 +0900
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Subject: [PATCH] udev: extend the length of ID_NET_NAME_XXX= to ALTIFNAMSIZ
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(cherry picked from commit 78f8849f84ca0939796edb840e878a9d2e124a4d)
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Related: #2005008
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---
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 src/udev/net/link-config.c     |  5 ++++-
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 src/udev/udev-builtin-net_id.c | 33 +++++++++++++++++----------------
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 src/udev/udev-event.c          |  4 ++--
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 3 files changed, 23 insertions(+), 19 deletions(-)
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diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
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index e5052f8f29..4de8ee7d7e 100644
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--- a/src/udev/net/link-config.c
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+++ b/src/udev/net/link-config.c
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@@ -19,6 +19,7 @@
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 #include "path-util.h"
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 #include "proc-cmdline.h"
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 #include "random-util.h"
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+#include "socket-util.h"
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 #include "stat-util.h"
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 #include "string-table.h"
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 #include "string-util.h"
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@@ -405,7 +406,7 @@ int link_config_apply(link_config_ctx *ctx, link_config *config,
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                 NamePolicy *policy;
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                 for (policy = config->name_policy;
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-                     !new_name && *policy != _NAMEPOLICY_INVALID; policy++) {
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+                     *policy != _NAMEPOLICY_INVALID; policy++) {
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                         switch (*policy) {
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                                 case NAMEPOLICY_KERNEL:
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                                         respect_predictable = true;
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@@ -428,6 +429,8 @@ int link_config_apply(link_config_ctx *ctx, link_config *config,
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                                 default:
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                                         break;
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                         }
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+                        if (ifname_valid(new_name))
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+                                break;
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                 }
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         }
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diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
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index eafcbb64c5..386d74ca5e 100644
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--- a/src/udev/udev-builtin-net_id.c
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+++ b/src/udev/udev-builtin-net_id.c
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@@ -90,6 +90,7 @@
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 #include <stdlib.h>
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 #include <string.h>
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 #include <unistd.h>
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+#include <linux/if.h>
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 #include <linux/pci_regs.h>
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 #include "dirent-util.h"
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@@ -176,21 +177,21 @@ struct netnames {
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         bool mac_valid;
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         struct udev_device *pcidev;
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-        char pci_slot[IFNAMSIZ];
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-        char pci_path[IFNAMSIZ];
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-        char pci_onboard[IFNAMSIZ];
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+        char pci_slot[ALTIFNAMSIZ];
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+        char pci_path[ALTIFNAMSIZ];
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+        char pci_onboard[ALTIFNAMSIZ];
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         const char *pci_onboard_label;
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-        char usb_ports[IFNAMSIZ];
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-        char bcma_core[IFNAMSIZ];
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-        char ccw_busid[IFNAMSIZ];
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-        char vio_slot[IFNAMSIZ];
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-        char platform_path[IFNAMSIZ];
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+        char usb_ports[ALTIFNAMSIZ];
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+        char bcma_core[ALTIFNAMSIZ];
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+        char ccw_busid[ALTIFNAMSIZ];
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+        char vio_slot[ALTIFNAMSIZ];
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+        char platform_path[ALTIFNAMSIZ];
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 };
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 struct virtfn_info {
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         struct udev_device *physfn_pcidev;
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-        char suffix[IFNAMSIZ];
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+        char suffix[ALTIFNAMSIZ];
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 };
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 static const NamingScheme* naming_scheme_from_name(const char *name) {
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@@ -887,7 +888,7 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
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         err = names_mac(dev, &names);
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         if (err >= 0 && names.mac_valid) {
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-                char str[IFNAMSIZ];
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+                char str[ALTIFNAMSIZ];
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                 xsprintf(str, "%sx%02x%02x%02x%02x%02x%02x", prefix,
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                          names.mac[0], names.mac[1], names.mac[2],
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@@ -900,7 +901,7 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
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         /* get path names for Linux on System z network devices */
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         err = names_ccw(dev, &names);
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         if (err >= 0 && names.type == NET_CCW) {
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-                char str[IFNAMSIZ];
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+                char str[ALTIFNAMSIZ];
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                 if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.ccw_busid))
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                         udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
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@@ -910,7 +911,7 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
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         /* get ibmveth/ibmvnic slot-based names. */
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         err = names_vio(dev, &names);
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         if (err >= 0 && names.type == NET_VIO) {
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-                char str[IFNAMSIZ];
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+                char str[ALTIFNAMSIZ];
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                 if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.vio_slot))
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                         udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
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@@ -920,7 +921,7 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
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         /* get ACPI path names for ARM64 platform devices */
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         err = names_platform(dev, &names, test);
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         if (err >= 0 && names.type == NET_PLATFORM) {
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-                char str[IFNAMSIZ];
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+                char str[ALTIFNAMSIZ];
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                 if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.platform_path))
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                         udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
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@@ -934,7 +935,7 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
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         /* plain PCI device */
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         if (names.type == NET_PCI) {
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-                char str[IFNAMSIZ];
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+                char str[ALTIFNAMSIZ];
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                 if (names.pci_onboard[0] &&
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                     snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_onboard))
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@@ -957,7 +958,7 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
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         /* USB device */
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         err = names_usb(dev, &names);
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         if (err >= 0 && names.type == NET_USB) {
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-                char str[IFNAMSIZ];
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+                char str[ALTIFNAMSIZ];
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                 if (names.pci_path[0] &&
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                     snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.usb_ports))
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@@ -972,7 +973,7 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
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         /* Broadcom bus */
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         err = names_bcma(dev, &names);
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         if (err >= 0 && names.type == NET_BCMA) {
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-                char str[IFNAMSIZ];
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+                char str[ALTIFNAMSIZ];
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                 if (names.pci_path[0] &&
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                     snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.bcma_core))
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diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
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index fd8406d959..19b100d4f8 100644
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--- a/src/udev/udev-event.c
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+++ b/src/udev/udev-event.c
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@@ -816,13 +816,13 @@ out:
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 static int rename_netif(struct udev_event *event) {
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         struct udev_device *dev = event->dev;
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-        char name[IFNAMSIZ];
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+        char name[ALTIFNAMSIZ];
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         const char *oldname;
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         int r;
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         oldname = udev_device_get_sysname(dev);
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-        strscpy(name, IFNAMSIZ, event->name);
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+        strscpy(name, ALTIFNAMSIZ, event->name);
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         r = rtnl_set_link_name(&event->rtnl, udev_device_get_ifindex(dev), name);
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         if (r < 0)