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netdev: move GETLINK into its own function, track command ID

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Move this logic into its own function and track the command ID
so it can be canceled in case of netdev going down.
This commit is contained in:
James Prestwood 2023-06-19 11:09:20 -07:00 committed by Denis Kenzior
parent c866f8dc9a
commit b7872de90a
1 changed files with 33 additions and 18 deletions
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51
src/netdev.c
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@ -131,6 +131,7 @@ struct netdev {
uint32_t qos_map_cmd_id;
uint32_t mac_change_cmd_id;
uint32_t get_oci_cmd_id;
uint32_t get_link_cmd_id;
enum netdev_result result;
uint16_t last_code; /* reason or status, depending on result */
struct l_timeout *neighbor_report_timeout;
@ -940,6 +941,11 @@ static void netdev_free(void *data)
if (netdev->fw_roam_bss)
scan_bss_free(netdev->fw_roam_bss);
if (netdev->get_link_cmd_id) {
l_netlink_cancel(rtnl, netdev->get_link_cmd_id);
netdev->get_link_cmd_id = 0;
}
scan_wdev_remove(netdev->wdev_id);
watchlist_destroy(&netdev->station_watches);
@ -6116,12 +6122,14 @@ static void netdev_initial_down_cb(int error, uint16_t type, const void *data,
static void netdev_getlink_cb(int error, uint16_t type, const void *data,
uint32_t len, void *user_data)
{
struct netdev *netdev = user_data;
const struct ifinfomsg *ifi = data;
unsigned int bytes;
struct netdev *netdev;
l_netlink_command_func_t cb;
bool powered;
netdev->get_link_cmd_id = 0;
if (error != 0) {
l_error("RTM_GETLINK error %i: %s", error, strerror(-error));
return;
@ -6133,8 +6141,7 @@ static void netdev_getlink_cb(int error, uint16_t type, const void *data,
return;
}
netdev = netdev_find(ifi->ifi_index);
if (!netdev)
if (L_WARN_ON((uint32_t)ifi->ifi_index != netdev->index))
return;
bytes = len - NLMSG_ALIGN(sizeof(struct ifinfomsg));
@ -6212,6 +6219,27 @@ error:
return NULL;
}
static void netdev_get_link(struct netdev *netdev)
{
struct ifinfomsg *rtmmsg;
size_t bufsize;
/* Query interface flags */
bufsize = NLMSG_ALIGN(sizeof(struct ifinfomsg));
rtmmsg = l_malloc(bufsize);
memset(rtmmsg, 0, bufsize);
rtmmsg->ifi_family = AF_UNSPEC;
rtmmsg->ifi_index = netdev->index;
netdev->get_link_cmd_id = l_netlink_send(rtnl, RTM_GETLINK, 0, rtmmsg,
bufsize, netdev_getlink_cb,
netdev, NULL);
L_WARN_ON(netdev->get_link_cmd_id == 0);
l_free(rtmmsg);
}
struct netdev *netdev_create_from_genl(struct l_genl_msg *msg,
const uint8_t *set_mac)
{
@ -6223,8 +6251,6 @@ struct netdev *netdev_create_from_genl(struct l_genl_msg *msg,
uint32_t wiphy_id;
struct netdev *netdev;
struct wiphy *wiphy = NULL;
struct ifinfomsg *rtmmsg;
size_t bufsize;
struct l_io *pae_io = NULL;
if (nl80211_parse_attrs(msg, NL80211_ATTR_IFINDEX, &ifindex,
@ -6283,21 +6309,10 @@ struct netdev *netdev_create_from_genl(struct l_genl_msg *msg,
l_debug("Created interface %s[%d %" PRIx64 "]", netdev->name,
netdev->index, netdev->wdev_id);
/* Query interface flags */
bufsize = NLMSG_ALIGN(sizeof(struct ifinfomsg));
rtmmsg = l_malloc(bufsize);
memset(rtmmsg, 0, bufsize);
rtmmsg->ifi_family = AF_UNSPEC;
rtmmsg->ifi_index = ifindex;
l_netlink_send(rtnl, RTM_GETLINK, 0, rtmmsg, bufsize,
netdev_getlink_cb, NULL, NULL);
l_free(rtmmsg);
netdev_setup_interface(netdev);
netdev_get_link(netdev);
return netdev;
}