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network,udev: add Property= setting in [Match] section

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Closes #5665.
This commit is contained in:
Yu Watanabe 2019-06-23 01:44:13 +09:00
parent b38de0e9cc
commit 44005bfb4e
12 changed files with 143 additions and 6 deletions
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15
man/systemd.link.xml
View File

@ -115,6 +115,21 @@
property <varname>DEVTYPE</varname>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Property=</varname></term>
<listitem>
<para>A whitespace-separated list of udev property name with its value after a equal
(<literal>=</literal>). If multiple properties are specified, the test results are ANDed.
If the list is prefixed with a "!", the test is inverted. If a value contains white
spaces, then please quote whole key and value pair. If a value contains quotation, then
please escape the quotation with <literal>\</literal>.</para>
<para>Example: if a .link file has the following:
<programlisting>Property=ID_MODEL_ID=9999 "ID_VENDOR_FROM_DATABASE=vendor name" "KEY=with \"quotation\""</programlisting>
then, the .link file matches only when an interface has all the above three properties.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Host=</varname></term>
<listitem>

15
man/systemd.network.xml
View File

@ -138,6 +138,21 @@
with a "!", the test is inverted.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Property=</varname></term>
<listitem>
<para>A whitespace-separated list of udev property name with its value after a equal
(<literal>=</literal>). If multiple properties are specified, the test results are ANDed.
If the list is prefixed with a "!", the test is inverted. If a value contains white
spaces, then please quote whole key and value pair. If a value contains quotation, then
please escape the quotation with <literal>\</literal>.</para>
<para>Example: if a .network file has the following:
<programlisting>Property=ID_MODEL_ID=9999 "ID_VENDOR_FROM_DATABASE=vendor name" "KEY=with \"quotation\""</programlisting>
then, the .network file matches only when an interface has all the above three properties.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Host=</varname></term>
<listitem>

97
src/libsystemd-network/network-internal.c
View File

@ -12,6 +12,7 @@
#include "conf-parser.h"
#include "device-util.h"
#include "dhcp-lease-internal.h"
#include "env-util.h"
#include "ether-addr-util.h"
#include "hexdecoct.h"
#include "log.h"
@ -101,11 +102,46 @@ static bool net_condition_test_strv(char * const *patterns, const char *string)
return has_positive_rule ? match : true;
}
static int net_condition_test_property(char * const *match_property, sd_device *device) {
char * const *p;
if (strv_isempty(match_property))
return true;
STRV_FOREACH(p, match_property) {
_cleanup_free_ char *key = NULL;
const char *val, *dev_val;
bool invert, v;
invert = **p == '!';
val = strchr(*p + invert, '=');
if (!val)
return -EINVAL;
key = strndup(*p + invert, val - *p - invert);
if (!key)
return -ENOMEM;
val++;
v = device &&
sd_device_get_property_value(device, key, &dev_val) >= 0 &&
fnmatch(val, dev_val, 0) == 0;
if (invert ? v : !v)
return false;
}
return true;
}
bool net_match_config(Set *match_mac,
char * const *match_paths,
char * const *match_drivers,
char * const *match_types,
char * const *match_names,
char * const *match_property,
sd_device *device,
const struct ether_addr *dev_mac,
const char *dev_name) {
@ -139,6 +175,9 @@ bool net_match_config(Set *match_mac,
if (!net_condition_test_strv(match_names, dev_name))
return false;
if (!net_condition_test_property(match_property, device))
return false;
return true;
}
@ -296,6 +335,64 @@ int config_parse_match_ifnames(
}
}
int config_parse_match_property(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
const char *p = rvalue;
char ***sv = data;
bool invert;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
invert = *p == '!';
p += invert;
for (;;) {
_cleanup_free_ char *word = NULL, *k = NULL;
r = extract_first_word(&p, &word, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE);
if (r == 0)
return 0;
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, 0,
"Invalid syntax, ignoring: %s", rvalue);
return 0;
}
if (!env_assignment_is_valid(word)) {
log_syntax(unit, LOG_ERR, filename, line, 0,
"Invalid property or value, ignoring assignment: %s", word);
continue;
}
if (invert) {
k = strjoin("!", word);
if (!k)
return log_oom();
} else
k = TAKE_PTR(word);
r = strv_consume(sv, TAKE_PTR(k));
if (r < 0)
return log_oom();
}
}
int config_parse_ifalias(const char *unit,
const char *filename,
unsigned line,

2
src/libsystemd-network/network-internal.h
View File

@ -19,6 +19,7 @@ bool net_match_config(Set *match_mac,
char * const *match_driver,
char * const *match_type,
char * const *match_name,
char * const *match_property,
sd_device *device,
const struct ether_addr *dev_mac,
const char *dev_name);
@ -28,6 +29,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_hwaddr);
CONFIG_PARSER_PROTOTYPE(config_parse_hwaddrs);
CONFIG_PARSER_PROTOTYPE(config_parse_match_strv);
CONFIG_PARSER_PROTOTYPE(config_parse_match_ifnames);
CONFIG_PARSER_PROTOTYPE(config_parse_match_property);
CONFIG_PARSER_PROTOTYPE(config_parse_ifalias);
CONFIG_PARSER_PROTOTYPE(config_parse_bridge_port_priority);

1
src/network/networkd-network-gperf.gperf
View File

@ -26,6 +26,7 @@ Match.Path, config_parse_match_strv,
Match.Driver, config_parse_match_strv, 0, offsetof(Network, match_driver)
Match.Type, config_parse_match_strv, 0, offsetof(Network, match_type)
Match.Name, config_parse_match_ifnames, 0, offsetof(Network, match_name)
Match.Property, config_parse_match_property, 0, offsetof(Network, match_property)
Match.Host, config_parse_net_condition, CONDITION_HOST, offsetof(Network, conditions)
Match.Virtualization, config_parse_net_condition, CONDITION_VIRTUALIZATION, offsetof(Network, conditions)
Match.KernelCommandLine, config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(Network, conditions)

9
src/network/networkd-network.c
View File

@ -157,7 +157,8 @@ int network_verify(Network *network) {
if (set_isempty(network->match_mac) && strv_isempty(network->match_path) &&
strv_isempty(network->match_driver) && strv_isempty(network->match_type) &&
strv_isempty(network->match_name) && !network->conditions)
strv_isempty(network->match_name) && strv_isempty(network->match_property) &&
!network->conditions)
log_warning("%s: No valid settings found in the [Match] section. "
"The file will match all interfaces. "
"If that is intended, please add Name=* in the [Match] section.",
@ -507,6 +508,7 @@ static Network *network_free(Network *network) {
strv_free(network->match_driver);
strv_free(network->match_type);
strv_free(network->match_name);
strv_free(network->match_property);
condition_free_list(network->conditions);
free(network->description);
@ -614,9 +616,8 @@ int network_get(Manager *manager, sd_device *device,
assert(ret);
ORDERED_HASHMAP_FOREACH(network, manager->networks, i)
if (net_match_config(network->match_mac, network->match_path,
network->match_driver, network->match_type,
network->match_name,
if (net_match_config(network->match_mac, network->match_path, network->match_driver,
network->match_type, network->match_name, network->match_property,
device, address, ifname)) {
if (network->match_name && device) {
const char *attr;

1
src/network/networkd-network.h
View File

@ -104,6 +104,7 @@ struct Network {
char **match_driver;
char **match_type;
char **match_name;
char **match_property;
LIST_HEAD(Condition, conditions);
char *description;

1
src/udev/net/link-config-gperf.gperf
View File

@ -24,6 +24,7 @@ Match.OriginalName, config_parse_match_ifnames, 0,
Match.Path, config_parse_match_strv, 0, offsetof(link_config, match_path)
Match.Driver, config_parse_match_strv, 0, offsetof(link_config, match_driver)
Match.Type, config_parse_match_strv, 0, offsetof(link_config, match_type)
Match.Property, config_parse_match_property, 0, offsetof(link_config, match_property)
Match.Host, config_parse_net_condition, CONDITION_HOST, offsetof(link_config, conditions)
Match.Virtualization, config_parse_net_condition, CONDITION_VIRTUALIZATION, offsetof(link_config, conditions)
Match.KernelCommandLine, config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(link_config, conditions)

5
src/udev/net/link-config.c
View File

@ -51,6 +51,7 @@ static void link_config_free(link_config *link) {
strv_free(link->match_driver);
strv_free(link->match_type);
strv_free(link->match_name);
strv_free(link->match_property);
condition_free_list(link->conditions);
free(link->description);
@ -161,7 +162,7 @@ int link_load_one(link_config_ctx *ctx, const char *filename) {
if (set_isempty(link->match_mac) && strv_isempty(link->match_path) &&
strv_isempty(link->match_driver) && strv_isempty(link->match_type) &&
strv_isempty(link->match_name) && !link->conditions)
strv_isempty(link->match_name) && strv_isempty(link->match_property) && !link->conditions)
log_warning("%s: No valid settings found in the [Match] section. "
"The file will match all interfaces. "
"If that is intended, please add OriginalName=* in the [Match] section.",
@ -241,7 +242,7 @@ int link_config_get(link_config_ctx *ctx, sd_device *device, link_config **ret)
LIST_FOREACH(links, link, ctx->links) {
if (net_match_config(link->match_mac, link->match_path, link->match_driver,
link->match_type, link->match_name,
link->match_type, link->match_name, link->match_property,
device, NULL, NULL)) {
if (link->match_name) {
unsigned name_assign_type = NET_NAME_UNKNOWN;

1
src/udev/net/link-config.h
View File

@ -40,6 +40,7 @@ struct link_config {
char **match_driver;
char **match_type;
char **match_name;
char **match_property;
LIST_HEAD(Condition, conditions);
char *description;

1
test/fuzz/fuzz-link-parser/directives.link
View File

@ -4,6 +4,7 @@ OriginalName=
Path=
Driver=
Type=
Property=
Host=
Virtualization=
KernelCommandLine=

1
test/fuzz/fuzz-network-parser/directives.network
View File

@ -20,6 +20,7 @@ Driver=
Architecture=
Path=
Name=
Property=
Virtualization=
KernelCommandLine=
Host=