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Merge "net: qrtr: Send BYE message for all nodes on ept"

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qctecmdr 2019-10-11 11:32:21 -07:00 • committed by Gerrit - the friendly Code Review server
commit 43a919b1c3
1 changed files with 29 additions and 8 deletions
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37
net/qrtr/qrtr.c
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@ -639,28 +639,49 @@ int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid)
}
EXPORT_SYMBOL_GPL(qrtr_endpoint_register);
static void qrtr_notify_bye(u32 nid)
{
struct sockaddr_qrtr src = {AF_QIPCRTR, nid, QRTR_PORT_CTRL};
struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL};
struct qrtr_ctrl_pkt *pkt;
struct sk_buff *skb;
skb = qrtr_alloc_ctrl_packet(&pkt);
if (!skb)
return;
pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE);
qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst);
}
/**
* qrtr_endpoint_unregister - unregister endpoint
* @ep: endpoint to unregister
*/
void qrtr_endpoint_unregister(struct qrtr_endpoint *ep)
{
struct radix_tree_iter iter;
struct qrtr_node *node = ep->node;
struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL};
struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL};
struct qrtr_ctrl_pkt *pkt;
struct sk_buff *skb;
unsigned long flags;
void __rcu **slot;
mutex_lock(&node->ep_lock);
node->ep = NULL;
mutex_unlock(&node->ep_lock);
/* Notify the local controller about the event */
skb = qrtr_alloc_ctrl_packet(&pkt);
if (skb) {
pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE);
qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst);
down_read(&qrtr_epts_lock);
spin_lock_irqsave(&qrtr_nodes_lock, flags);
radix_tree_for_each_slot(slot, &qrtr_nodes, &iter, 0) {
if (node != *slot)
continue;
spin_unlock_irqrestore(&qrtr_nodes_lock, flags);
qrtr_notify_bye(iter.index);
spin_lock_irqsave(&qrtr_nodes_lock, flags);
}
spin_unlock_irqrestore(&qrtr_nodes_lock, flags);
up_read(&qrtr_epts_lock);
/* Wake up any transmitters waiting for resume-tx from the node */
wake_up_interruptible_all(&node->resume_tx);