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Commit 3194d6ad authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'net/rds-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux 



Santosh Shilimkar says:

====================
rds fixes

Few rds fixes which makes rds rdma transport reliably working on mainline

First two fixes are applicable to v4.11+ stable versions and last
three patches applies to only v5.1 stable and current mainline.

Patchset is re-based against 'net' and also available on below tree
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 114a5c32 dc205a8d

net/rds/connection.c

+1 −0
Original line number Diff line number Diff line
@@ -736,6 +736,7 @@ static int rds_conn_info_visitor(struct rds_conn_path *cp, void *buffer) 
	cinfo->next_rx_seq = cp->cp_next_rx_seq;

	cinfo->laddr = conn->c_laddr.s6_addr32[3];

	cinfo->faddr = conn->c_faddr.s6_addr32[3];

	cinfo->tos = conn->c_tos;

	strncpy(cinfo->transport, conn->c_trans->t_name,

		sizeof(cinfo->transport));

	cinfo->flags = 0;

net/rds/ib.h

+1 −3
Original line number Diff line number Diff line
@@ -15,8 +15,7 @@ 


#define RDS_IB_DEFAULT_RECV_WR		1024

#define RDS_IB_DEFAULT_SEND_WR		256

#define RDS_IB_DEFAULT_FR_WR		256

#define RDS_IB_DEFAULT_FR_INV_WR	256

#define RDS_IB_DEFAULT_FR_WR		512



#define RDS_IB_DEFAULT_RETRY_COUNT	1
@@ -157,7 +156,6 @@ struct rds_ib_connection { 


	/* To control the number of wrs from fastreg */

	atomic_t		i_fastreg_wrs;

	atomic_t		i_fastunreg_wrs;



	/* interrupt handling */

	struct tasklet_struct	i_send_tasklet;

net/rds/ib_cm.c

+2 −7
Original line number Diff line number Diff line
@@ -460,10 +460,7 @@ static int rds_ib_setup_qp(struct rds_connection *conn) 
	 * completion queue and send queue. This extra space is used for FRMR

	 * registration and invalidation work requests

	 */

	fr_queue_space = rds_ibdev->use_fastreg ?

			 (RDS_IB_DEFAULT_FR_WR + 1) +

			 (RDS_IB_DEFAULT_FR_INV_WR + 1)

			 : 0;

	fr_queue_space = (rds_ibdev->use_fastreg ? RDS_IB_DEFAULT_FR_WR : 0);



	/* add the conn now so that connection establishment has the dev */

	rds_ib_add_conn(rds_ibdev, conn);
@@ -530,7 +527,6 @@ static int rds_ib_setup_qp(struct rds_connection *conn) 
	attr.send_cq = ic->i_send_cq;

	attr.recv_cq = ic->i_recv_cq;

	atomic_set(&ic->i_fastreg_wrs, RDS_IB_DEFAULT_FR_WR);

	atomic_set(&ic->i_fastunreg_wrs, RDS_IB_DEFAULT_FR_INV_WR);



	/*

	 * XXX this can fail if max_*_wr is too large?  Are we supposed
@@ -1009,8 +1005,7 @@ void rds_ib_conn_path_shutdown(struct rds_conn_path *cp) 
		wait_event(rds_ib_ring_empty_wait,

			   rds_ib_ring_empty(&ic->i_recv_ring) &&

			   (atomic_read(&ic->i_signaled_sends) == 0) &&

			   (atomic_read(&ic->i_fastreg_wrs) == RDS_IB_DEFAULT_FR_WR) &&

			   (atomic_read(&ic->i_fastunreg_wrs) == RDS_IB_DEFAULT_FR_INV_WR));

			   (atomic_read(&ic->i_fastreg_wrs) == RDS_IB_DEFAULT_FR_WR));

		tasklet_kill(&ic->i_send_tasklet);

		tasklet_kill(&ic->i_recv_tasklet);

net/rds/ib_frmr.c

+5 −6
Original line number Diff line number Diff line
@@ -239,8 +239,8 @@ static int rds_ib_post_inv(struct rds_ib_mr *ibmr) 
	if (frmr->fr_state != FRMR_IS_INUSE)

		goto out;



	while (atomic_dec_return(&ibmr->ic->i_fastunreg_wrs) <= 0) {

		atomic_inc(&ibmr->ic->i_fastunreg_wrs);

	while (atomic_dec_return(&ibmr->ic->i_fastreg_wrs) <= 0) {

		atomic_inc(&ibmr->ic->i_fastreg_wrs);

		cpu_relax();

	}
@@ -257,7 +257,7 @@ static int rds_ib_post_inv(struct rds_ib_mr *ibmr) 
	if (unlikely(ret)) {

		frmr->fr_state = FRMR_IS_STALE;

		frmr->fr_inv = false;

		atomic_inc(&ibmr->ic->i_fastunreg_wrs);

		atomic_inc(&ibmr->ic->i_fastreg_wrs);

		pr_err("RDS/IB: %s returned error(%d)\n", __func__, ret);

		goto out;

	}
@@ -285,10 +285,9 @@ void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc) 
	if (frmr->fr_inv) {

		frmr->fr_state = FRMR_IS_FREE;

		frmr->fr_inv = false;

		atomic_inc(&ic->i_fastreg_wrs);

	} else {

		atomic_inc(&ic->i_fastunreg_wrs);

	}



	atomic_inc(&ic->i_fastreg_wrs);

}



void rds_ib_unreg_frmr(struct list_head *list, unsigned int *nfreed,

net/rds/ib_send.c

+13 −16
Original line number Diff line number Diff line
@@ -69,6 +69,16 @@ static void rds_ib_send_complete(struct rds_message *rm, 
	complete(rm, notify_status);

}



static void rds_ib_send_unmap_data(struct rds_ib_connection *ic,

				   struct rm_data_op *op,

				   int wc_status)

{

	if (op->op_nents)

		ib_dma_unmap_sg(ic->i_cm_id->device,

				op->op_sg, op->op_nents,

				DMA_TO_DEVICE);

}



static void rds_ib_send_unmap_rdma(struct rds_ib_connection *ic,

				   struct rm_rdma_op *op,

				   int wc_status)
@@ -129,21 +139,6 @@ static void rds_ib_send_unmap_atomic(struct rds_ib_connection *ic, 
		rds_ib_stats_inc(s_ib_atomic_fadd);

}



static void rds_ib_send_unmap_data(struct rds_ib_connection *ic,

				   struct rm_data_op *op,

				   int wc_status)

{

	struct rds_message *rm = container_of(op, struct rds_message, data);



	if (op->op_nents)

		ib_dma_unmap_sg(ic->i_cm_id->device,

				op->op_sg, op->op_nents,

				DMA_TO_DEVICE);



	if (rm->rdma.op_active && rm->data.op_notify)

		rds_ib_send_unmap_rdma(ic, &rm->rdma, wc_status);

}



/*

 * Unmap the resources associated with a struct send_work.

 *
@@ -902,7 +897,9 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op) 
		send->s_queued = jiffies;

		send->s_op = NULL;



		nr_sig += rds_ib_set_wr_signal_state(ic, send, op->op_notify);

		if (!op->op_notify)

			nr_sig += rds_ib_set_wr_signal_state(ic, send,

							     op->op_notify);



		send->s_wr.opcode = op->op_write ? IB_WR_RDMA_WRITE : IB_WR_RDMA_READ;

		send->s_rdma_wr.remote_addr = remote_addr;