Messages in this thread | | | Subject | Re: [PATCH 1/5] net: qrtr: Move resume-tx transmission to recvmsg | From | Arun Kumar Neelakantam <> | Date | Thu, 9 May 2019 15:53:49 +0530 |
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On 5/8/2019 11:36 AM, Bjorn Andersson wrote: > The confirm-rx bit is used to implement a per port flow control, in > order to make sure that no messages are dropped due to resource > exhaustion. Move the resume-tx transmission to recvmsg to only confirm > messages as they are consumed by the application. > > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > net/qrtr/qrtr.c | 60 +++++++++++++++++++++++++++---------------------- > 1 file changed, 33 insertions(+), 27 deletions(-) > > diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c > index dd0e97f4f6c0..07a35362fba2 100644 > --- a/net/qrtr/qrtr.c > +++ b/net/qrtr/qrtr.c > @@ -369,22 +369,11 @@ static void qrtr_port_put(struct qrtr_sock *ipc); > static void qrtr_node_rx_work(struct work_struct *work) > { > struct qrtr_node *node = container_of(work, struct qrtr_node, work); > - struct qrtr_ctrl_pkt *pkt; > - struct sockaddr_qrtr dst; > - struct sockaddr_qrtr src; > struct sk_buff *skb; > > while ((skb = skb_dequeue(&node->rx_queue)) != NULL) { > struct qrtr_sock *ipc; > - struct qrtr_cb *cb; > - int confirm; > - > - cb = (struct qrtr_cb *)skb->cb; > - src.sq_node = cb->src_node; > - src.sq_port = cb->src_port; > - dst.sq_node = cb->dst_node; > - dst.sq_port = cb->dst_port; > - confirm = !!cb->confirm_rx; > + struct qrtr_cb *cb = (struct qrtr_cb *)skb->cb; > > qrtr_node_assign(node, cb->src_node); > > @@ -397,20 +386,6 @@ static void qrtr_node_rx_work(struct work_struct *work) > > qrtr_port_put(ipc); > } > - > - if (confirm) { > - skb = qrtr_alloc_ctrl_packet(&pkt); > - if (!skb) > - break; > - > - pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX); > - pkt->client.node = cpu_to_le32(dst.sq_node); > - pkt->client.port = cpu_to_le32(dst.sq_port); > - > - if (qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX, > - &dst, &src)) > - break; > - } > } > } > > @@ -822,6 +797,34 @@ static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) > return rc; > } > > +static int qrtr_resume_tx(struct qrtr_cb *cb) This function name is adding some confusion with qrtr_tx_resume() in next patch. can you please rename this function to qrtr_send_resume_tx(). > +{ > + struct sockaddr_qrtr remote = { AF_QIPCRTR, cb->src_node, cb->src_port }; > + struct sockaddr_qrtr local = { AF_QIPCRTR, cb->dst_node, cb->dst_port }; > + struct qrtr_ctrl_pkt *pkt; > + struct qrtr_node *node; > + struct sk_buff *skb; > + int ret; > + > + node = qrtr_node_lookup(remote.sq_node); > + if (!node) > + return -EINVAL; > + > + skb = qrtr_alloc_ctrl_packet(&pkt); > + if (!skb) > + return -ENOMEM; > + > + pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX); > + pkt->client.node = cpu_to_le32(cb->dst_node); > + pkt->client.port = cpu_to_le32(cb->dst_port); > + > + ret = qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX, &local, &remote); > + > + qrtr_node_release(node); > + > + return ret; > +} > + > static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, > size_t size, int flags) > { > @@ -844,6 +847,7 @@ static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, > release_sock(sk); > return rc; > } > + cb = (struct qrtr_cb *)skb->cb; > > copied = skb->len; > if (copied > size) { > @@ -857,7 +861,6 @@ static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, > rc = copied; > > if (addr) { > - cb = (struct qrtr_cb *)skb->cb; > addr->sq_family = AF_QIPCRTR; > addr->sq_node = cb->src_node; > addr->sq_port = cb->src_port; > @@ -865,6 +868,9 @@ static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, > } > > out: > + if (cb->confirm_rx) > + qrtr_resume_tx(cb); > + > skb_free_datagram(sk, skb); > release_sock(sk); >
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