From c76d050d8d61b4a63d4407bd03bd3f49cd9915ce Mon Sep 17 00:00:00 2001

From: Yu Watanabe <watanabe.yu+github@gmail.com>

Date: Sun, 15 Dec 2019 22:46:19 +0900

Subject: [PATCH] network: make Name= in [Match] support alternative names of

 interfaces

(cherry picked from commit 572b21d96cabd5860b0670e98440b6cb99a4b749

src/network bits have been left out.)

Related: #1850986

---

 man/systemd.network.xml                   |  7 +++----

 src/libsystemd-network/network-internal.c | 20 ++++++++++++++++++--

 src/libsystemd-network/network-internal.h |  3 ++-

 src/udev/net/link-config.c                |  3 ++-

 4 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/man/systemd.network.xml b/man/systemd.network.xml

index fc8e0aea68..8300540096 100644

--- a/man/systemd.network.xml

+++ b/man/systemd.network.xml

@@ -133,10 +133,9 @@

         <varlistentry>

           <term><varname>Name=</varname></term>

           <listitem>

-            <para>A whitespace-separated list of shell-style globs

-            matching the device name, as exposed by the udev property

-            <literal>INTERFACE</literal>. If the list is prefixed

-            with a "!", the test is inverted.</para>

+            <para>A whitespace-separated list of shell-style globs matching the device name, as exposed

+            by the udev property <literal>INTERFACE</literal>, or device's alternative names. If the

+            list is prefixed with a "!", the test is inverted.</para>

           </listitem>

         </varlistentry>

         <varlistentry>

diff --git a/src/libsystemd-network/network-internal.c b/src/libsystemd-network/network-internal.c

index 629e858def..a935709cd0 100644

--- a/src/libsystemd-network/network-internal.c

+++ b/src/libsystemd-network/network-internal.c

@@ -92,6 +92,18 @@ static bool net_condition_test_strv(char * const *raw_patterns,

         return string && strv_fnmatch(raw_patterns, string, 0);

 }

+static bool net_condition_test_ifname(char * const *patterns, const char *ifname, char * const *alternative_names) {

+        if (net_condition_test_strv(patterns, ifname))

+                return true;

+

+        char * const *p;

+        STRV_FOREACH(p, alternative_names)

+                if (net_condition_test_strv(patterns, *p))

+                        return true;

+

+        return false;

+}

+

 bool net_match_config(Set *match_mac,

                       char * const *match_paths,

                       char * const *match_drivers,

@@ -107,7 +119,8 @@ bool net_match_config(Set *match_mac,

                       const char *dev_parent_driver,

                       const char *dev_driver,

                       const char *dev_type,

-                      const char *dev_name) {

+                      const char *dev_name,

+                      char * const *alternative_names) {

         if (match_host && condition_test(match_host) <= 0)

                 return false;

@@ -124,6 +137,9 @@ bool net_match_config(Set *match_mac,

         if (match_arch && condition_test(match_arch) <= 0)

                 return false;

+        if (!net_condition_test_ifname(match_names, dev_name, alternative_names))

+                return false;

+

         if (match_mac && dev_mac && !set_contains(match_mac, dev_mac))

                 return false;

@@ -214,7 +230,7 @@ int config_parse_match_ifnames(

                 if (r == 0)

                         break;

-                if (!ifname_valid(word)) {

+                if (!ifname_valid_full(word, ltype)) {

                         log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);

                         return 0;

                 }

diff --git a/src/libsystemd-network/network-internal.h b/src/libsystemd-network/network-internal.h

index 9074758bbb..e1d098f3fe 100644

--- a/src/libsystemd-network/network-internal.h

+++ b/src/libsystemd-network/network-internal.h

@@ -29,7 +29,8 @@ bool net_match_config(Set *match_mac,

                       const char *dev_parent_driver,

                       const char *dev_driver,

                       const char *dev_type,

-                      const char *dev_name);

+                      const char *dev_name,

+                      char * const *alternative_names);

 CONFIG_PARSER_PROTOTYPE(config_parse_net_condition);

 CONFIG_PARSER_PROTOTYPE(config_parse_hwaddr);

diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c

index d07a1a1874..e5052f8f29 100644

--- a/src/udev/net/link-config.c

+++ b/src/udev/net/link-config.c

@@ -238,7 +238,8 @@ int link_config_get(link_config_ctx *ctx, struct udev_device *device,

                                      udev_device_get_driver(udev_device_get_parent(device)),

                                      udev_device_get_property_value(device, "ID_NET_DRIVER"),

                                      udev_device_get_devtype(device),

-                                     udev_device_get_sysname(device))) {

+                                     udev_device_get_sysname(device),

+                                     NULL)) {

                         if (link->match_name) {

                                 unsigned char name_assign_type = NET_NAME_UNKNOWN;