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sd-netlink: introduce rtnl_resolve_link_alternative_names()

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This commit is contained in:
Yu Watanabe 2019-12-17 18:28:36 +09:00
parent 13b6c4c8de
commit b04c5e51da
3 changed files with 31 additions and 0 deletions
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1
src/libsystemd/sd-netlink/netlink-types.c
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@ -593,6 +593,7 @@ static const NLType rtnl_link_types[] = {
[IFLA_MIN_MTU] = { .type = NETLINK_TYPE_U32 },
[IFLA_MAX_MTU] = { .type = NETLINK_TYPE_U32 },
[IFLA_PROP_LIST] = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_prop_list_type_system },
[IFLA_ALT_IFNAME] = { .type = NETLINK_TYPE_STRING, .size = ALTIFNAMSIZ - 1 },
};
static const NLTypeSystem rtnl_link_type_system = {

29
src/libsystemd/sd-netlink/netlink-util.c
View File

@ -123,6 +123,35 @@ int rtnl_set_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const
return 0;
}
int rtnl_resolve_link_alternative_name(sd_netlink **rtnl, const char *name, int *ret) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL, *reply = NULL;
int r;
assert(rtnl);
assert(name);
assert(ret);
if (!*rtnl) {
r = sd_netlink_open(rtnl);
if (r < 0)
return r;
}
r = sd_rtnl_message_new_link(*rtnl, &message, RTM_GETLINK, 0);
if (r < 0)
return r;
r = sd_netlink_message_append_string(message, IFLA_ALT_IFNAME, name);
if (r < 0)
return r;
r = sd_netlink_call(*rtnl, message, 0, &reply);
if (r < 0)
return r;
return sd_rtnl_message_link_get_ifindex(reply, ret);
}
int rtnl_message_new_synthetic_error(sd_netlink *rtnl, int error, uint32_t serial, sd_netlink_message **ret) {
struct nlmsgerr *err;
int r;

1
src/libsystemd/sd-netlink/netlink-util.h
View File

@ -50,6 +50,7 @@ static inline bool rtnl_message_type_is_qdisc(uint16_t type) {
int rtnl_set_link_name(sd_netlink **rtnl, int ifindex, const char *name);
int rtnl_set_link_properties(sd_netlink **rtnl, int ifindex, const char *alias, const struct ether_addr *mac, uint32_t mtu);
int rtnl_set_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const *alternative_names);
int rtnl_resolve_link_alternative_name(sd_netlink **rtnl, const char *name, int *ret);
int rtnl_log_parse_error(int r);
int rtnl_log_create_error(int r);