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net: qrtr: Allow non-immediate node routing 

In order to reach non-immediate remote node services that are
accessed through an intermediate node, the route to the remote
node needs to be saved.

E.g for a [node1 <=> node2 <=> node3] network
- node2 forwards node3 service to node1
- node1 must save node2 as route for reaching node3

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Loic Poulain 2020-11-06 18:33:28 +01:00 committed by Jakub Kicinski
parent 87f547c108
commit 0baa99ee35
1 changed files with 10 additions and 2 deletions
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12
net/qrtr/qrtr.c
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@ -401,12 +401,13 @@ static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid)
{
unsigned long flags;
if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO)
if (nid == QRTR_EP_NID_AUTO)
return;
spin_lock_irqsave(&qrtr_nodes_lock, flags);
radix_tree_insert(&qrtr_nodes, nid, node);
node->nid = nid;
if (node->nid == QRTR_EP_NID_AUTO)
node->nid = nid;
spin_unlock_irqrestore(&qrtr_nodes_lock, flags);
}
@ -494,6 +495,13 @@ int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
qrtr_node_assign(node, cb->src_node);
if (cb->type == QRTR_TYPE_NEW_SERVER) {
/* Remote node endpoint can bridge other distant nodes */
const struct qrtr_ctrl_pkt *pkt = data + hdrlen;
qrtr_node_assign(node, le32_to_cpu(pkt->server.node));
}
if (cb->type == QRTR_TYPE_RESUME_TX) {
qrtr_tx_resume(node, skb);
} else {