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mac802154: Add MLME Tx locked helpers 

These have the exact same behavior as before, except they expect the
rtnl to be already taken (and will complain otherwise). This allows
performing MLME transmissions from different contexts.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-6-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
This commit is contained in:
Miquel Raynal 2023-01-03 17:56:43 +01:00 committed by Stefan Schmidt
parent 5755cd4d94
commit dd18096256
2 changed files with 43 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/mac802154/ieee802154_i.h
View File

@ -141,10 +141,16 @@ int ieee802154_mlme_op_pre(struct ieee802154_local *local);
int ieee802154_mlme_tx(struct ieee802154_local *local,
struct ieee802154_sub_if_data *sdata,
struct sk_buff *skb);
int ieee802154_mlme_tx_locked(struct ieee802154_local *local,
struct ieee802154_sub_if_data *sdata,
struct sk_buff *skb);
void ieee802154_mlme_op_post(struct ieee802154_local *local);
int ieee802154_mlme_tx_one(struct ieee802154_local *local,
struct ieee802154_sub_if_data *sdata,
struct sk_buff *skb);
int ieee802154_mlme_tx_one_locked(struct ieee802154_local *local,
struct ieee802154_sub_if_data *sdata,
struct sk_buff *skb);
netdev_tx_t
ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
netdev_tx_t

58
net/mac802154/tx.c
View File

@ -137,34 +137,37 @@ int ieee802154_mlme_op_pre(struct ieee802154_local *local)
return ieee802154_sync_and_hold_queue(local);
}
int ieee802154_mlme_tx_locked(struct ieee802154_local *local,
struct ieee802154_sub_if_data *sdata,
struct sk_buff *skb)
{
/* Avoid possible calls to ->ndo_stop() when we asynchronously perform
* MLME transmissions.
*/
ASSERT_RTNL();
/* Ensure the device was not stopped, otherwise error out */
if (!local->open_count)
return -ENETDOWN;
/* Warn if the ieee802154 core thinks MLME frames can be sent while the
* net interface expects this cannot happen.
*/
if (WARN_ON_ONCE(!netif_running(sdata->dev)))
return -ENETDOWN;
ieee802154_tx(local, skb);
return ieee802154_sync_queue(local);
}
int ieee802154_mlme_tx(struct ieee802154_local *local,
struct ieee802154_sub_if_data *sdata,
struct sk_buff *skb)
{
int ret;
/* Avoid possible calls to ->ndo_stop() when we asynchronously perform
* MLME transmissions.
*/
rtnl_lock();
/* Ensure the device was not stopped, otherwise error out */
if (!local->open_count) {
rtnl_unlock();
return -ENETDOWN;
}
/* Warn if the ieee802154 core thinks MLME frames can be sent while the
* net interface expects this cannot happen.
*/
if (WARN_ON_ONCE(!netif_running(sdata->dev))) {
rtnl_unlock();
return -ENETDOWN;
}
ieee802154_tx(local, skb);
ret = ieee802154_sync_queue(local);
ret = ieee802154_mlme_tx_locked(local, sdata, skb);
rtnl_unlock();
return ret;
@ -188,6 +191,19 @@ int ieee802154_mlme_tx_one(struct ieee802154_local *local,
return ret;
}
int ieee802154_mlme_tx_one_locked(struct ieee802154_local *local,
struct ieee802154_sub_if_data *sdata,
struct sk_buff *skb)
{
int ret;
ieee802154_mlme_op_pre(local);
ret = ieee802154_mlme_tx_locked(local, sdata, skb);
ieee802154_mlme_op_post(local);
return ret;
}
static bool ieee802154_queue_is_stopped(struct ieee802154_local *local)
{
return test_bit(WPAN_PHY_FLAG_STATE_QUEUE_STOPPED, &local->phy->flags);