mirror of
https://github.com/systemd/systemd
synced 2024-10-07 00:30:59 +00:00
udev/net: introduce [Link] Property=, ImportProperty=, and UnsetProperty= settings
The applied order is equivalent to Environment=, PassEnvironment=, and UnsetEnvironment= for [Service] or so.
This commit is contained in:
parent
513ca8b6f0
commit
046286e863
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@ -364,6 +364,59 @@
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<xi:include href="version-info.xml" xpointer="v211"/>
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<xi:include href="version-info.xml" xpointer="v211"/>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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<varlistentry>
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<term><varname>Property=</varname></term>
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<listitem>
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<para>Set specified udev properties. This takes space separated list of key-value pairs
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concatenated with equal sign (<literal>=</literal>). Example:
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<programlisting>Property=HOGE=foo BAR=baz</programlisting>
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This option supports simple specifier expansion, see the Specifiers section below.
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This option can be specified multiple times. If an empty string is assigned, then the all previous
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assignments are cleared.</para>
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<para>This setting is useful to configure the <literal>ID_NET_MANAGED_BY=</literal> property which
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declares which network management service shall manage the interface, which is respected by
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systemd-networkd and others. Use
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<programlisting>Property=ID_NET_MANAGED_BY=io.systemd.Network</programlisting>
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to declare explicitly that <command>systemd-networkd</command> shall manage the interface, or set
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the property to something else to declare explicitly it shall not do so. See
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<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details how this property is used to match interface names.</para>
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<xi:include href="version-info.xml" xpointer="v256"/>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ImportProperty=</varname></term>
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<listitem>
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<para>Import specified udev properties from the saved database. This takes space separated list of
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property names. Example: <programlisting>ImportProperty=HOGE BAR</programlisting>
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This option supports simple specifier expansion, see the Specifiers section below.
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This option can be specified multiple times. If an empty string is assigned, then the all previous
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assignments are cleared.</para>
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<para>If the same property is also set in <varname>Property=</varname> in the above, then the
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imported property value will be overridden by the value specified in <varname>Property=</varname>.
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</para>
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<xi:include href="version-info.xml" xpointer="v256"/>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>UnsetProperty=</varname></term>
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<listitem>
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<para>Unset specified udev properties. This takes space separated list of
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property names. Example: <programlisting>ImportProperty=HOGE BAR</programlisting>
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This option supports simple specifier expansion, see the Specifiers section below.
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This option can be specified multiple times. If an empty string is assigned, then the all previous
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assignments are cleared.</para>
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<para>This setting is applied after <varname>ImportProperty=</varname> and
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<varname>Property=</varname> are applied. Hence, if the same property is specified in
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<varname>ImportProperty=</varname> or <varname>Property=</varname>, then the imported or specified
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property value will be ignored, and the property will be unset.</para>
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<xi:include href="version-info.xml" xpointer="v256"/>
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</listitem>
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</varlistentry>
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<varlistentry>
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<varlistentry>
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<term><varname>Alias=</varname></term>
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<term><varname>Alias=</varname></term>
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<listitem>
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<listitem>
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@ -1260,6 +1313,47 @@
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</variablelist>
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</variablelist>
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</refsect1>
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</refsect1>
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<refsect1>
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<title>Specifiers</title>
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<para>Some settings resolve specifiers which may be used to write generic unit files referring to runtime
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or unit parameters that are replaced when the unit files are loaded. Specifiers must be known and
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resolvable for the setting to be valid. The following specifiers are understood:</para>
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<table class='specifiers'>
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<title>Specifiers available in unit files</title>
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<tgroup cols='3' align='left' colsep='1' rowsep='1'>
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<colspec colname="spec" />
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<colspec colname="mean" />
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<colspec colname="detail" />
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<thead>
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<row>
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<entry>Specifier</entry>
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<entry>Meaning</entry>
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<entry>Details</entry>
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</row>
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</thead>
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<tbody>
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<xi:include href="standard-specifiers.xml" xpointer="a"/>
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<xi:include href="standard-specifiers.xml" xpointer="A"/>
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<xi:include href="standard-specifiers.xml" xpointer="b"/>
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<xi:include href="standard-specifiers.xml" xpointer="B"/>
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<xi:include href="standard-specifiers.xml" xpointer="H"/>
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<xi:include href="standard-specifiers.xml" xpointer="l"/>
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<xi:include href="standard-specifiers.xml" xpointer="m"/>
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<xi:include href="standard-specifiers.xml" xpointer="M"/>
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<xi:include href="standard-specifiers.xml" xpointer="o"/>
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<xi:include href="standard-specifiers.xml" xpointer="q"/>
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<xi:include href="standard-specifiers.xml" xpointer="T"/>
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<xi:include href="standard-specifiers.xml" xpointer="v"/>
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<xi:include href="standard-specifiers.xml" xpointer="V"/>
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<xi:include href="standard-specifiers.xml" xpointer="w"/>
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<xi:include href="standard-specifiers.xml" xpointer="W"/>
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</tbody>
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</tgroup>
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</table>
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</refsect1>
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<refsect1>
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<refsect1>
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<title>Examples</title>
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<title>Examples</title>
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@ -38,6 +38,9 @@ Match.Credential, config_parse_net_condition,
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Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECTURE, offsetof(LinkConfig, conditions)
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Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECTURE, offsetof(LinkConfig, conditions)
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Match.Firmware, config_parse_net_condition, CONDITION_FIRMWARE, offsetof(LinkConfig, conditions)
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Match.Firmware, config_parse_net_condition, CONDITION_FIRMWARE, offsetof(LinkConfig, conditions)
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Link.Description, config_parse_string, 0, offsetof(LinkConfig, description)
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Link.Description, config_parse_string, 0, offsetof(LinkConfig, description)
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Link.Property, config_parse_udev_property, 0, offsetof(LinkConfig, properties)
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Link.ImportProperty, config_parse_udev_property_name, 0, offsetof(LinkConfig, import_properties)
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Link.UnsetProperty, config_parse_udev_property_name, 0, offsetof(LinkConfig, unset_properties)
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Link.MACAddressPolicy, config_parse_mac_address_policy, 0, offsetof(LinkConfig, mac_address_policy)
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Link.MACAddressPolicy, config_parse_mac_address_policy, 0, offsetof(LinkConfig, mac_address_policy)
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Link.MACAddress, config_parse_hw_addr, 0, offsetof(LinkConfig, hw_addr)
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Link.MACAddress, config_parse_hw_addr, 0, offsetof(LinkConfig, hw_addr)
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Link.NamePolicy, config_parse_name_policy, 0, offsetof(LinkConfig, name_policy)
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Link.NamePolicy, config_parse_name_policy, 0, offsetof(LinkConfig, name_policy)
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@ -15,6 +15,7 @@
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#include "creds-util.h"
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#include "creds-util.h"
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#include "device-private.h"
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#include "device-private.h"
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#include "device-util.h"
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#include "device-util.h"
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#include "env-util.h"
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#include "escape.h"
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#include "escape.h"
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#include "ethtool-util.h"
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#include "ethtool-util.h"
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#include "fd-util.h"
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#include "fd-util.h"
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@ -31,6 +32,7 @@
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#include "path-util.h"
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#include "path-util.h"
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#include "proc-cmdline.h"
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#include "proc-cmdline.h"
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#include "random-util.h"
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#include "random-util.h"
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#include "specifier.h"
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#include "stat-util.h"
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#include "stat-util.h"
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#include "string-table.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "string-util.h"
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@ -38,6 +40,12 @@
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#include "udev-builtin.h"
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#include "udev-builtin.h"
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#include "utf8.h"
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#include "utf8.h"
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static const Specifier link_specifier_table[] = {
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COMMON_SYSTEM_SPECIFIERS,
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COMMON_TMP_SPECIFIERS,
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{}
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};
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struct LinkConfigContext {
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struct LinkConfigContext {
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LIST_HEAD(LinkConfig, configs);
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LIST_HEAD(LinkConfig, configs);
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int ethtool_fd;
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int ethtool_fd;
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@ -55,6 +63,9 @@ static LinkConfig* link_config_free(LinkConfig *config) {
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condition_free_list(config->conditions);
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condition_free_list(config->conditions);
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free(config->description);
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free(config->description);
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strv_free(config->properties);
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strv_free(config->import_properties);
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strv_free(config->unset_properties);
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free(config->name_policy);
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free(config->name_policy);
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free(config->name);
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free(config->name);
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strv_free(config->alternative_names);
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strv_free(config->alternative_names);
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@ -365,18 +376,20 @@ Link *link_free(Link *link) {
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return NULL;
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return NULL;
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sd_device_unref(link->device);
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sd_device_unref(link->device);
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sd_device_unref(link->device_db_clone);
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free(link->kind);
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free(link->kind);
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strv_free(link->altnames);
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strv_free(link->altnames);
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return mfree(link);
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return mfree(link);
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}
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}
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int link_new(LinkConfigContext *ctx, sd_netlink **rtnl, sd_device *device, Link **ret) {
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int link_new(LinkConfigContext *ctx, sd_netlink **rtnl, sd_device *device, sd_device *device_db_clone, Link **ret) {
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_cleanup_(link_freep) Link *link = NULL;
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_cleanup_(link_freep) Link *link = NULL;
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int r;
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int r;
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assert(ctx);
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assert(ctx);
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assert(rtnl);
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assert(rtnl);
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assert(device);
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assert(device);
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assert(device_db_clone);
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assert(ret);
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assert(ret);
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link = new(Link, 1);
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link = new(Link, 1);
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@ -385,6 +398,7 @@ int link_new(LinkConfigContext *ctx, sd_netlink **rtnl, sd_device *device, Link
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*link = (Link) {
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*link = (Link) {
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.device = sd_device_ref(device),
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.device = sd_device_ref(device),
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.device_db_clone = sd_device_ref(device_db_clone),
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};
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};
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r = sd_device_get_sysname(device, &link->ifname);
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r = sd_device_get_sysname(device, &link->ifname);
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@ -932,6 +946,31 @@ static int link_apply_udev_properties(Link *link, bool test) {
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config = ASSERT_PTR(link->config);
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config = ASSERT_PTR(link->config);
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device = ASSERT_PTR(link->device);
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device = ASSERT_PTR(link->device);
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/* 1. apply ImportProperty=. */
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STRV_FOREACH(p, config->import_properties)
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(void) udev_builtin_import_property(device, link->device_db_clone, test, *p);
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/* 2. apply Property=. */
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STRV_FOREACH(p, config->properties) {
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_cleanup_free_ char *key = NULL;
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const char *eq;
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eq = strchr(*p, '=');
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if (!eq)
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continue;
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key = strndup(*p, eq - *p);
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if (!key)
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return log_oom();
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(void) udev_builtin_add_property(device, test, key, eq + 1);
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}
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/* 3. apply UnsetProperty=. */
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STRV_FOREACH(p, config->unset_properties)
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(void) udev_builtin_add_property(device, test, *p, NULL);
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/* 4. set the default properties. */
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(void) udev_builtin_add_property(device, test, "ID_NET_LINK_FILE", config->filename);
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(void) udev_builtin_add_property(device, test, "ID_NET_LINK_FILE", config->filename);
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_cleanup_free_ char *joined = NULL;
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_cleanup_free_ char *joined = NULL;
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@ -988,6 +1027,142 @@ int link_apply_config(LinkConfigContext *ctx, sd_netlink **rtnl, Link *link, boo
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return 0;
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return 0;
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}
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}
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int config_parse_udev_property(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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char ***properties = ASSERT_PTR(data);
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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if (isempty(rvalue)) {
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/* Empty assignment resets the list */
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*properties = strv_free(*properties);
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return 0;
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}
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for (const char *p = rvalue;; ) {
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_cleanup_free_ char *word = NULL, *resolved = NULL, *key = NULL;
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const char *eq;
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r = extract_first_word(&p, &word, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE);
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"Invalid syntax, ignoring assignment: %s", rvalue);
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return 0;
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}
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if (r == 0)
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return 0;
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r = specifier_printf(word, SIZE_MAX, link_specifier_table, NULL, NULL, &resolved);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"Failed to resolve specifiers in %s, ignoring assignment: %m", word);
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continue;
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}
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/* The restriction for udev property is not clear. Let's apply the one for environment variable here. */
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if (!env_assignment_is_valid(resolved)) {
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log_syntax(unit, LOG_WARNING, filename, line, 0,
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"Invalid udev property, ignoring assignment: %s", word);
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continue;
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}
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assert_se(eq = strchr(resolved, '='));
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key = strndup(resolved, eq - resolved);
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if (!key)
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return log_oom();
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if (!device_property_can_set(key)) {
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log_syntax(unit, LOG_WARNING, filename, line, 0,
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"Invalid udev property name '%s', ignoring assignment: %s", key, resolved);
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continue;
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}
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r = strv_env_replace_consume(properties, TAKE_PTR(resolved));
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if (r < 0)
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return log_error_errno(r, "Failed to update properties: %m");
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}
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}
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int config_parse_udev_property_name(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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char ***properties = ASSERT_PTR(data);
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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if (isempty(rvalue)) {
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/* Empty assignment resets the list */
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*properties = strv_free(*properties);
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return 0;
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}
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for (const char *p = rvalue;; ) {
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_cleanup_free_ char *word = NULL, *resolved = NULL;
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r = extract_first_word(&p, &word, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE);
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
|
||||||
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
||||||
|
"Invalid syntax, ignoring assignment: %s", rvalue);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
if (r == 0)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
r = specifier_printf(word, SIZE_MAX, link_specifier_table, NULL, NULL, &resolved);
|
||||||
|
if (r < 0) {
|
||||||
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
||||||
|
"Failed to resolve specifiers in %s, ignoring assignment: %m", word);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* The restriction for udev property is not clear. Let's apply the one for environment variable here. */
|
||||||
|
if (!env_name_is_valid(resolved)) {
|
||||||
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
||||||
|
"Invalid udev property name, ignoring assignment: %s", resolved);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!device_property_can_set(resolved)) {
|
||||||
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
||||||
|
"Invalid udev property name, ignoring assignment: %s", resolved);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
r = strv_consume(properties, TAKE_PTR(resolved));
|
||||||
|
if (r < 0)
|
||||||
|
return log_error_errno(r, "Failed to update properties: %m");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
int config_parse_ifalias(
|
int config_parse_ifalias(
|
||||||
const char *unit,
|
const char *unit,
|
||||||
const char *filename,
|
const char *filename,
|
||||||
|
|
|
@ -31,6 +31,7 @@ typedef struct Link {
|
||||||
|
|
||||||
LinkConfig *config;
|
LinkConfig *config;
|
||||||
sd_device *device;
|
sd_device *device;
|
||||||
|
sd_device *device_db_clone;
|
||||||
sd_device_action_t action;
|
sd_device_action_t action;
|
||||||
|
|
||||||
char *kind;
|
char *kind;
|
||||||
|
@ -51,6 +52,9 @@ struct LinkConfig {
|
||||||
LIST_HEAD(Condition, conditions);
|
LIST_HEAD(Condition, conditions);
|
||||||
|
|
||||||
char *description;
|
char *description;
|
||||||
|
char **properties;
|
||||||
|
char **import_properties;
|
||||||
|
char **unset_properties;
|
||||||
struct hw_addr_data hw_addr;
|
struct hw_addr_data hw_addr;
|
||||||
MACAddressPolicy mac_address_policy;
|
MACAddressPolicy mac_address_policy;
|
||||||
NamePolicy *name_policy;
|
NamePolicy *name_policy;
|
||||||
|
@ -95,7 +99,7 @@ int link_load_one(LinkConfigContext *ctx, const char *filename);
|
||||||
int link_config_load(LinkConfigContext *ctx);
|
int link_config_load(LinkConfigContext *ctx);
|
||||||
bool link_config_should_reload(LinkConfigContext *ctx);
|
bool link_config_should_reload(LinkConfigContext *ctx);
|
||||||
|
|
||||||
int link_new(LinkConfigContext *ctx, sd_netlink **rtnl, sd_device *device, Link **ret);
|
int link_new(LinkConfigContext *ctx, sd_netlink **rtnl, sd_device *device, sd_device *device_db_clone, Link **ret);
|
||||||
Link *link_free(Link *link);
|
Link *link_free(Link *link);
|
||||||
DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
|
DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
|
||||||
|
|
||||||
|
@ -108,6 +112,8 @@ MACAddressPolicy mac_address_policy_from_string(const char *p) _pure_;
|
||||||
/* gperf lookup function */
|
/* gperf lookup function */
|
||||||
const struct ConfigPerfItem* link_config_gperf_lookup(const char *key, GPERF_LEN_TYPE length);
|
const struct ConfigPerfItem* link_config_gperf_lookup(const char *key, GPERF_LEN_TYPE length);
|
||||||
|
|
||||||
|
CONFIG_PARSER_PROTOTYPE(config_parse_udev_property);
|
||||||
|
CONFIG_PARSER_PROTOTYPE(config_parse_udev_property_name);
|
||||||
CONFIG_PARSER_PROTOTYPE(config_parse_ifalias);
|
CONFIG_PARSER_PROTOTYPE(config_parse_ifalias);
|
||||||
CONFIG_PARSER_PROTOTYPE(config_parse_rx_tx_queues);
|
CONFIG_PARSER_PROTOTYPE(config_parse_rx_tx_queues);
|
||||||
CONFIG_PARSER_PROTOTYPE(config_parse_txqueuelen);
|
CONFIG_PARSER_PROTOTYPE(config_parse_txqueuelen);
|
||||||
|
|
|
@ -41,7 +41,7 @@ static int builtin_net_setup_link(UdevEvent *event, int argc, char **argv, bool
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
r = link_new(ctx, &event->rtnl, dev, &link);
|
r = link_new(ctx, &event->rtnl, dev, event->dev_db_clone, &link);
|
||||||
if (r == -ENODEV) {
|
if (r == -ENODEV) {
|
||||||
log_device_debug_errno(dev, r, "Link vanished while getting information, ignoring.");
|
log_device_debug_errno(dev, r, "Link vanished while getting information, ignoring.");
|
||||||
return 0;
|
return 0;
|
||||||
|
|
|
@ -6,6 +6,8 @@
|
||||||
#include <stdio.h>
|
#include <stdio.h>
|
||||||
#include <stdlib.h>
|
#include <stdlib.h>
|
||||||
|
|
||||||
|
#include "device-private.h"
|
||||||
|
#include "device-util.h"
|
||||||
#include "log.h"
|
#include "log.h"
|
||||||
#include "udev-builtin.h"
|
#include "udev-builtin.h"
|
||||||
#include "udevadm.h"
|
#include "udevadm.h"
|
||||||
|
@ -104,6 +106,15 @@ int builtin_main(int argc, char *argv[], void *userdata) {
|
||||||
goto finish;
|
goto finish;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
if (arg_action != SD_DEVICE_REMOVE) {
|
||||||
|
/* For net_setup_link */
|
||||||
|
r = device_clone_with_db(dev, &event->dev_db_clone);
|
||||||
|
if (r < 0) {
|
||||||
|
log_device_error_errno(dev, r, "Failed to clone device: %m");
|
||||||
|
goto finish;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
r = udev_builtin_run(event, cmd, arg_command, true);
|
r = udev_builtin_run(event, cmd, arg_command, true);
|
||||||
if (r < 0) {
|
if (r < 0) {
|
||||||
log_debug_errno(r, "Builtin command '%s' fails: %m", arg_command);
|
log_debug_errno(r, "Builtin command '%s' fails: %m", arg_command);
|
||||||
|
|
Loading…
Reference in a new issue