Commit a6688d91 authored by Karsten Graul's avatar Karsten Graul Committed by David S. Miller
Browse files

net/smc: enqueue all received LLC messages 



Introduce smc_llc_enqueue() to enqueue LLC messages, and adapt
smc_llc_rx_handler() to enqueue all received LLC messages.
smc_llc_enqueue() also makes it possible to enqueue LLC messages from
local code.

Signed-off-by: default avatarKarsten Graul <kgraul@linux.ibm.com>
Reviewed-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 555da9af

net/smc/smc_llc.c

+29 −17
Original line number Diff line number Diff line
@@ -719,11 +719,14 @@ again: 
}



/* process llc responses in tasklet context */

static void smc_llc_rx_response(struct smc_link *link, union smc_llc_msg *llc)

static void smc_llc_rx_response(struct smc_link *link,

				struct smc_llc_qentry *qentry)

{

	u8 llc_type = qentry->msg.raw.hdr.common.type;

	union smc_llc_msg *llc = &qentry->msg;

	int rc = 0;



	switch (llc->raw.hdr.common.type) {

	switch (llc_type) {

	case SMC_LLC_TEST_LINK:

		if (link->state == SMC_LNK_ACTIVE)

			complete(&link->llc_testlink_resp);
@@ -759,40 +762,49 @@ static void smc_llc_rx_response(struct smc_link *link, union smc_llc_msg *llc) 
		complete(&link->llc_delete_rkey_resp);

		break;

	}

	kfree(qentry);

}



/* copy received msg and add it to the event queue */

static void smc_llc_rx_handler(struct ib_wc *wc, void *buf)

static void smc_llc_enqueue(struct smc_link *link, union smc_llc_msg *llc)

{

	struct smc_link *link = (struct smc_link *)wc->qp->qp_context;

	struct smc_link_group *lgr = link->lgr;

	struct smc_llc_qentry *qentry;

	union smc_llc_msg *llc = buf;

	unsigned long flags;



	if (wc->byte_len < sizeof(*llc))

		return; /* short message */

	if (llc->raw.hdr.length != sizeof(*llc))

		return; /* invalid message */



	/* process responses immediately */

	if (llc->raw.hdr.flags & SMC_LLC_FLAG_RESP) {

		smc_llc_rx_response(link, llc);

		return;

	}



	qentry = kmalloc(sizeof(*qentry), GFP_ATOMIC);

	if (!qentry)

		return;

	qentry->link = link;

	INIT_LIST_HEAD(&qentry->list);

	memcpy(&qentry->msg, llc, sizeof(union smc_llc_msg));



	/* process responses immediately */

	if (llc->raw.hdr.flags & SMC_LLC_FLAG_RESP) {

		smc_llc_rx_response(link, qentry);

		return;

	}



	/* add requests to event queue */

	spin_lock_irqsave(&lgr->llc_event_q_lock, flags);

	list_add_tail(&qentry->list, &lgr->llc_event_q);

	spin_unlock_irqrestore(&lgr->llc_event_q_lock, flags);

	schedule_work(&link->lgr->llc_event_work);

}



/* copy received msg and add it to the event queue */

static void smc_llc_rx_handler(struct ib_wc *wc, void *buf)

{

	struct smc_link *link = (struct smc_link *)wc->qp->qp_context;

	union smc_llc_msg *llc = buf;



	if (wc->byte_len < sizeof(*llc))

		return; /* short message */

	if (llc->raw.hdr.length != sizeof(*llc))

		return; /* invalid message */



	smc_llc_enqueue(link, llc);

}



/***************************** worker, utils *********************************/



static void smc_llc_testlink_work(struct work_struct *work)

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