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netlink: introduce rtnl_get/delete_link_alternative_names()

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This commit is contained in:
Yu Watanabe 2020-07-17 21:29:13 +09:00
parent 7f16ef9fba
commit 1498252614
2 changed files with 45 additions and 2 deletions
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45
src/libsystemd/sd-netlink/netlink-util.c
View File

@ -85,12 +85,45 @@ int rtnl_set_link_properties(sd_netlink **rtnl, int ifindex, const char *alias,
return 0;
}
int rtnl_set_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const *alternative_names) {
int rtnl_get_link_alternative_names(sd_netlink **rtnl, int ifindex, char ***ret) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL, *reply = NULL;
_cleanup_strv_free_ char **names = NULL;
int r;
assert(rtnl);
assert(ifindex > 0);
assert(ret);
if (!*rtnl) {
r = sd_netlink_open(rtnl);
if (r < 0)
return r;
}
r = sd_rtnl_message_new_link(*rtnl, &message, RTM_GETLINK, ifindex);
if (r < 0)
return r;
r = sd_netlink_call(*rtnl, message, 0, &reply);
if (r < 0)
return r;
r = sd_netlink_message_read_strv(reply, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &names);
if (r < 0 && r != -ENODATA)
return r;
*ret = TAKE_PTR(names);
return 0;
}
static int rtnl_update_link_alternative_names(sd_netlink **rtnl, uint16_t nlmsg_type, int ifindex, char * const *alternative_names) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
int r;
assert(rtnl);
assert(ifindex > 0);
assert(IN_SET(nlmsg_type, RTM_NEWLINKPROP, RTM_DELLINKPROP));
if (strv_isempty(alternative_names))
return 0;
@ -101,7 +134,7 @@ int rtnl_set_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const
return r;
}
r = sd_rtnl_message_new_link(*rtnl, &message, RTM_NEWLINKPROP, ifindex);
r = sd_rtnl_message_new_link(*rtnl, &message, nlmsg_type, ifindex);
if (r < 0)
return r;
@ -124,6 +157,14 @@ int rtnl_set_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const
return 0;
}
int rtnl_set_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const *alternative_names) {
return rtnl_update_link_alternative_names(rtnl, RTM_NEWLINKPROP, ifindex, alternative_names);
}
int rtnl_delete_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const *alternative_names) {
return rtnl_update_link_alternative_names(rtnl, RTM_DELLINKPROP, ifindex, alternative_names);
}
int rtnl_set_link_alternative_names_by_ifname(sd_netlink **rtnl, const char *ifname, char * const *alternative_names) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
int r;

2
src/libsystemd/sd-netlink/netlink-util.h
View File

@ -53,8 +53,10 @@ static inline bool rtnl_message_type_is_tclass(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_get_link_alternative_names(sd_netlink **rtnl, int ifindex, char ***ret);
int rtnl_set_link_alternative_names(sd_netlink **rtnl, int ifindex, char * const *alternative_names);
int rtnl_set_link_alternative_names_by_ifname(sd_netlink **rtnl, const char *ifname, char * const *alternative_names);
int rtnl_delete_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 rtnl_get_link_iftype(sd_netlink **rtnl, int ifindex, unsigned short *ret);