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[v2,3/5] net: qrtr: Allow non-immediate node routing

Message ID 1604684010-24090-4-git-send-email-loic.poulain@linaro.org
State Accepted
Delegated to: David Miller
Headers show
Series net: qrtr: Add distant node support | expand

Checks

Context Check Description
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jkicinski/tree_selection success Guessed tree name to be net-next
jkicinski/subject_prefix warning Target tree name not specified in the subject
jkicinski/source_inline success Was 0 now: 0
jkicinski/verify_signedoff success Link
jkicinski/module_param success Was 0 now: 0
jkicinski/build_32bit success Errors and warnings before: 3 this patch: 3
jkicinski/kdoc success Errors and warnings before: 0 this patch: 0
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jkicinski/checkpatch success total: 0 errors, 0 warnings, 0 checks, 28 lines checked
jkicinski/build_allmodconfig_warn success Errors and warnings before: 3 this patch: 3
jkicinski/header_inline success Link
jkicinski/stable success Stable not CCed

Commit Message

Loic Poulain Nov. 6, 2020, 5:33 p.m. UTC 
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>
---
 net/qrtr/qrtr.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index e09154b..1d12408 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -400,12 +400,13 @@  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);
 }
 
@@ -493,6 +494,13 @@  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 {