RDS: Remove struct rds_rdma_op

A big changeset, but it's all pretty dumb.

struct rds_rdma_op was already embedded in struct rm_rdma_op.
Remove rds_rdma_op and put its members in rm_rdma_op. Rename
members with "op_" prefix instead of "r_", for consistency.

Of course this breaks a lot, so fixup the code accordingly.
Signed-off-by: NAndy Grover <andy.grover@oracle.com>

net/rds/ib.h

@@ -54,7 +54,7 @@ struct rds_ib_connect_private {
 
 struct rds_ib_send_work {
 	struct rds_message	*s_rm;
-	struct rds_rdma_op	*s_op;
+	struct rm_rdma_op	*s_op;
 	struct ib_send_wr	s_wr;
 	struct ib_sge		s_sge[RDS_IB_MAX_SGE];
 	unsigned long		s_queued;
@@ -331,7 +331,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
 void rds_ib_send_cq_comp_handler(struct ib_cq *cq, void *context);
 void rds_ib_send_init_ring(struct rds_ib_connection *ic);
 void rds_ib_send_clear_ring(struct rds_ib_connection *ic);
-int rds_ib_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op);
+int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op);
 void rds_ib_send_add_credits(struct rds_connection *conn, unsigned int credits);
 void rds_ib_advertise_credits(struct rds_connection *conn, unsigned int posted);
 int rds_ib_send_grab_credits(struct rds_ib_connection *ic, u32 wanted,

net/rds/ib_send.c

@@ -79,14 +79,14 @@ static void rds_ib_send_unmap_rm(struct rds_ib_connection *ic,
 			rm->data.m_sg, rm->data.m_nents,
 			DMA_TO_DEVICE);
 
-	if (rm->rdma.m_rdma_op.r_active) {
-		struct rds_rdma_op *op = &rm->rdma.m_rdma_op;
+	if (rm->rdma.op_active) {
+		struct rm_rdma_op *op = &rm->rdma;
 
-		if (op->r_mapped) {
+		if (op->op_mapped) {
 			ib_dma_unmap_sg(ic->i_cm_id->device,
-					op->r_sg, op->r_nents,
-					op->r_write ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-			op->r_mapped = 0;
+					op->op_sg, op->op_nents,
+					op->op_write ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+			op->op_mapped = 0;
 		}
 
 		/* If the user asked for a completion notification on this
@@ -111,10 +111,10 @@ static void rds_ib_send_unmap_rm(struct rds_ib_connection *ic,
 		 */
 		rds_ib_send_complete(rm, wc_status, rds_rdma_send_complete);
 
-		if (rm->rdma.m_rdma_op.r_write)
-			rds_stats_add(s_send_rdma_bytes, rm->rdma.m_rdma_op.r_bytes);
+		if (rm->rdma.op_write)
+			rds_stats_add(s_send_rdma_bytes, rm->rdma.op_bytes);
 		else
-			rds_stats_add(s_recv_rdma_bytes, rm->rdma.m_rdma_op.r_bytes);
+			rds_stats_add(s_recv_rdma_bytes, rm->rdma.op_bytes);
 	}
 
 	if (rm->atomic.op_active) {
@@ -540,10 +540,10 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
 
 		/* If it has a RDMA op, tell the peer we did it. This is
 		 * used by the peer to release use-once RDMA MRs. */
-		if (rm->rdma.m_rdma_op.r_active) {
+		if (rm->rdma.op_active) {
 			struct rds_ext_header_rdma ext_hdr;
 
-			ext_hdr.h_rdma_rkey = cpu_to_be32(rm->rdma.m_rdma_op.r_key);
+			ext_hdr.h_rdma_rkey = cpu_to_be32(rm->rdma.op_rkey);
 			rds_message_add_extension(&rm->m_inc.i_hdr,
 					RDS_EXTHDR_RDMA, &ext_hdr, sizeof(ext_hdr));
 		}
@@ -576,7 +576,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
 	 * or when requested by the user. Right now, we let
 	 * the application choose.
 	 */
-	if (rm->rdma.m_rdma_op.r_active && rm->rdma.m_rdma_op.r_fence)
+	if (rm->rdma.op_active && rm->rdma.op_fence)
 		send_flags = IB_SEND_FENCE;
 
 	/* Each frag gets a header. Msgs may be 0 bytes */
@@ -746,7 +746,7 @@ int rds_ib_xmit_atomic(struct rds_connection *conn, struct rds_message *rm)
 	 * we must fill in s_rm ourselves, so we properly clean up
 	 * on completion.
 	 */
-	if (!rm->rdma.m_rdma_op.r_active && !rm->data.op_active)
+	if (!rm->rdma.op_active && !rm->data.op_active)
 		send->s_rm = rm;
 
 	/* map 8 byte retval buffer to the device */
@@ -788,7 +788,7 @@ int rds_ib_xmit_atomic(struct rds_connection *conn, struct rds_message *rm)
 	return ret;
 }
 
-int rds_ib_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
+int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op)
 {
 	struct rds_ib_connection *ic = conn->c_transport_data;
 	struct rds_ib_send_work *send = NULL;
@@ -798,7 +798,7 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	struct rds_ib_device *rds_ibdev;
 	struct scatterlist *scat;
 	unsigned long len;
-	u64 remote_addr = op->r_remote_addr;
+	u64 remote_addr = op->op_remote_addr;
 	u32 pos;
 	u32 work_alloc;
 	u32 i;
@@ -810,25 +810,25 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	rds_ibdev = ib_get_client_data(ic->i_cm_id->device, &rds_ib_client);
 
 	/* map the message the first time we see it */
-	if (!op->r_mapped) {
-		op->r_count = ib_dma_map_sg(ic->i_cm_id->device,
-					op->r_sg, op->r_nents, (op->r_write) ?
+	if (!op->op_mapped) {
+		op->op_count = ib_dma_map_sg(ic->i_cm_id->device,
+					     op->op_sg, op->op_nents, (op->op_write) ?
 					     DMA_TO_DEVICE : DMA_FROM_DEVICE);
-		rdsdebug("ic %p mapping op %p: %d\n", ic, op, op->r_count);
-		if (op->r_count == 0) {
+		rdsdebug("ic %p mapping op %p: %d\n", ic, op, op->op_count);
+		if (op->op_count == 0) {
 			rds_ib_stats_inc(s_ib_tx_sg_mapping_failure);
 			ret = -ENOMEM; /* XXX ? */
 			goto out;
 		}
 
-		op->r_mapped = 1;
+		op->op_mapped = 1;
 	}
 
 	/*
 	 * Instead of knowing how to return a partial rdma read/write we insist that there
 	 * be enough work requests to send the entire message.
 	 */
-	i = ceil(op->r_count, rds_ibdev->max_sge);
+	i = ceil(op->op_count, rds_ibdev->max_sge);
 
 	work_alloc = rds_ib_ring_alloc(&ic->i_send_ring, i, &pos);
 	if (work_alloc != i) {
@@ -841,19 +841,19 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	send = &ic->i_sends[pos];
 	first = send;
 	prev = NULL;
-	scat = &op->r_sg[0];
+	scat = &op->op_sg[0];
 	sent = 0;
-	num_sge = op->r_count;
+	num_sge = op->op_count;
 
-	for (i = 0; i < work_alloc && scat != &op->r_sg[op->r_count]; i++) {
+	for (i = 0; i < work_alloc && scat != &op->op_sg[op->op_count]; i++) {
 		send->s_wr.send_flags = 0;
 		send->s_queued = jiffies;
 
-		rds_ib_set_wr_signal_state(ic, send, op->r_notify);
+		rds_ib_set_wr_signal_state(ic, send, op->op_notify);
 
-		send->s_wr.opcode = op->r_write ? IB_WR_RDMA_WRITE : IB_WR_RDMA_READ;
+		send->s_wr.opcode = op->op_write ? IB_WR_RDMA_WRITE : IB_WR_RDMA_READ;
 		send->s_wr.wr.rdma.remote_addr = remote_addr;
-		send->s_wr.wr.rdma.rkey = op->r_key;
+		send->s_wr.wr.rdma.rkey = op->op_rkey;
 		send->s_op = op;
 
 		if (num_sge > rds_ibdev->max_sge) {
@@ -868,7 +868,7 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 		if (prev)
 			prev->s_wr.next = &send->s_wr;
 
-		for (j = 0; j < send->s_wr.num_sge && scat != &op->r_sg[op->r_count]; j++) {
+		for (j = 0; j < send->s_wr.num_sge && scat != &op->op_sg[op->op_count]; j++) {
 			len = ib_sg_dma_len(ic->i_cm_id->device, scat);
 			send->s_sge[j].addr =
 				 ib_sg_dma_address(ic->i_cm_id->device, scat);

net/rds/iw.h

@@ -70,7 +70,7 @@ struct rds_iw_send_work {
 	struct rds_message	*s_rm;
 
 	/* We should really put these into a union: */
-	struct rds_rdma_op	*s_op;
+	struct rm_rdma_op	*s_op;
 	struct rds_iw_mapping	*s_mapping;
 	struct ib_mr		*s_mr;
 	struct ib_fast_reg_page_list *s_page_list;
@@ -357,7 +357,7 @@ int rds_iw_xmit(struct rds_connection *conn, struct rds_message *rm,
 void rds_iw_send_cq_comp_handler(struct ib_cq *cq, void *context);
 void rds_iw_send_init_ring(struct rds_iw_connection *ic);
 void rds_iw_send_clear_ring(struct rds_iw_connection *ic);
-int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op);
+int rds_iw_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op);
 void rds_iw_send_add_credits(struct rds_connection *conn, unsigned int credits);
 void rds_iw_advertise_credits(struct rds_connection *conn, unsigned int posted);
 int rds_iw_send_grab_credits(struct rds_iw_connection *ic, u32 wanted,

net/rds/iw_send.c

@@ -63,13 +63,13 @@ static void rds_iw_send_rdma_complete(struct rds_message *rm,
 }
 
 static void rds_iw_send_unmap_rdma(struct rds_iw_connection *ic,
-				   struct rds_rdma_op *op)
+				   struct rm_rdma_op *op)
 {
-	if (op->r_mapped) {
+	if (op->op_mapped) {
 		ib_dma_unmap_sg(ic->i_cm_id->device,
-			op->r_sg, op->r_nents,
-			op->r_write ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-		op->r_mapped = 0;
+			op->op_sg, op->op_nents,
+			op->op_write ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+		op->op_mapped = 0;
 	}
 }
 
@@ -85,8 +85,8 @@ static void rds_iw_send_unmap_rm(struct rds_iw_connection *ic,
 		     rm->data.m_sg, rm->data.m_nents,
 		     DMA_TO_DEVICE);
 
-	if (rm->rdma.m_rdma_op.r_active) {
-		rds_iw_send_unmap_rdma(ic, &rm->rdma.m_rdma_op);
+	if (rm->rdma.op_active) {
+		rds_iw_send_unmap_rdma(ic, &rm->rdma);
 
 		/* If the user asked for a completion notification on this
 		 * message, we can implement three different semantics:
@@ -110,10 +110,10 @@ static void rds_iw_send_unmap_rm(struct rds_iw_connection *ic,
 		 */
 		rds_iw_send_rdma_complete(rm, wc_status);
 
-		if (rm->rdma.m_rdma_op.r_write)
-			rds_stats_add(s_send_rdma_bytes, rm->rdma.m_rdma_op.r_bytes);
+		if (rm->rdma.op_write)
+			rds_stats_add(s_send_rdma_bytes, rm->rdma.op_bytes);
 		else
-			rds_stats_add(s_recv_rdma_bytes, rm->rdma.m_rdma_op.r_bytes);
+			rds_stats_add(s_recv_rdma_bytes, rm->rdma.op_bytes);
 	}
 
 	/* If anyone waited for this message to get flushed out, wake
@@ -591,10 +591,10 @@ int rds_iw_xmit(struct rds_connection *conn, struct rds_message *rm,
 
 		/* If it has a RDMA op, tell the peer we did it. This is
 		 * used by the peer to release use-once RDMA MRs. */
-		if (rm->rdma.m_rdma_op.r_active) {
+		if (rm->rdma.op_active) {
 			struct rds_ext_header_rdma ext_hdr;
 
-			ext_hdr.h_rdma_rkey = cpu_to_be32(rm->rdma.m_rdma_op.r_key);
+			ext_hdr.h_rdma_rkey = cpu_to_be32(rm->rdma.op_rkey);
 			rds_message_add_extension(&rm->m_inc.i_hdr,
 					RDS_EXTHDR_RDMA, &ext_hdr, sizeof(ext_hdr));
 		}
@@ -632,7 +632,7 @@ int rds_iw_xmit(struct rds_connection *conn, struct rds_message *rm,
 	 * or when requested by the user. Right now, we let
 	 * the application choose.
 	 */
-	if (rm->rdma.m_rdma_op.r_active && rm->rdma.m_rdma_op.r_fence)
+	if (rm->rdma.op_active && rm->rdma.op_fence)
 		send_flags = IB_SEND_FENCE;
 
 	/*
@@ -785,7 +785,7 @@ static void rds_iw_build_send_fastreg(struct rds_iw_device *rds_iwdev, struct rd
 	ib_update_fast_reg_key(send->s_mr, send->s_remap_count++);
 }
 
-int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
+int rds_iw_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op)
 {
 	struct rds_iw_connection *ic = conn->c_transport_data;
 	struct rds_iw_send_work *send = NULL;
@@ -795,7 +795,7 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	struct rds_iw_device *rds_iwdev;
 	struct scatterlist *scat;
 	unsigned long len;
-	u64 remote_addr = op->r_remote_addr;
+	u64 remote_addr = op->op_remote_addr;
 	u32 pos, fr_pos;
 	u32 work_alloc;
 	u32 i;
@@ -807,21 +807,21 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
 
 	/* map the message the first time we see it */
-	if (!op->r_mapped) {
-		op->r_count = ib_dma_map_sg(ic->i_cm_id->device,
-					op->r_sg, op->r_nents, (op->r_write) ?
+	if (!op->op_mapped) {
+		op->op_count = ib_dma_map_sg(ic->i_cm_id->device,
+					     op->op_sg, op->op_nents, (op->op_write) ?
 					     DMA_TO_DEVICE : DMA_FROM_DEVICE);
-		rdsdebug("ic %p mapping op %p: %d\n", ic, op, op->r_count);
-		if (op->r_count == 0) {
+		rdsdebug("ic %p mapping op %p: %d\n", ic, op, op->op_count);
+		if (op->op_count == 0) {
 			rds_iw_stats_inc(s_iw_tx_sg_mapping_failure);
 			ret = -ENOMEM; /* XXX ? */
 			goto out;
 		}
 
-		op->r_mapped = 1;
+		op->op_mapped = 1;
 	}
 
-	if (!op->r_write) {
+	if (!op->op_write) {
 		/* Alloc space on the send queue for the fastreg */
 		work_alloc = rds_iw_ring_alloc(&ic->i_send_ring, 1, &fr_pos);
 		if (work_alloc != 1) {
@@ -836,7 +836,7 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	 * Instead of knowing how to return a partial rdma read/write we insist that there
 	 * be enough work requests to send the entire message.
 	 */
-	i = ceil(op->r_count, rds_iwdev->max_sge);
+	i = ceil(op->op_count, rds_iwdev->max_sge);
 
 	work_alloc = rds_iw_ring_alloc(&ic->i_send_ring, i, &pos);
 	if (work_alloc != i) {
@@ -847,17 +847,17 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	}
 
 	send = &ic->i_sends[pos];
-	if (!op->r_write) {
+	if (!op->op_write) {
 		first = prev = &ic->i_sends[fr_pos];
 	} else {
 		first = send;
 		prev = NULL;
 	}
-	scat = &op->r_sg[0];
+	scat = &op->op_sg[0];
 	sent = 0;
-	num_sge = op->r_count;
+	num_sge = op->op_count;
 
-	for (i = 0; i < work_alloc && scat != &op->r_sg[op->r_count]; i++) {
+	for (i = 0; i < work_alloc && scat != &op->op_sg[op->op_count]; i++) {
 		send->s_wr.send_flags = 0;
 		send->s_queued = jiffies;
 
@@ -874,13 +874,13 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 		 * for local access after RDS is finished with it, using
 		 * IB_WR_RDMA_READ_WITH_INV will invalidate it after the read has completed.
 		 */
-		if (op->r_write)
+		if (op->op_write)
 			send->s_wr.opcode = IB_WR_RDMA_WRITE;
 		else
 			send->s_wr.opcode = IB_WR_RDMA_READ_WITH_INV;
 
 		send->s_wr.wr.rdma.remote_addr = remote_addr;
-		send->s_wr.wr.rdma.rkey = op->r_key;
+		send->s_wr.wr.rdma.rkey = op->op_rkey;
 		send->s_op = op;
 
 		if (num_sge > rds_iwdev->max_sge) {
@@ -894,7 +894,7 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 		if (prev)
 			prev->s_wr.next = &send->s_wr;
 
-		for (j = 0; j < send->s_wr.num_sge && scat != &op->r_sg[op->r_count]; j++) {
+		for (j = 0; j < send->s_wr.num_sge && scat != &op->op_sg[op->op_count]; j++) {
 			len = ib_sg_dma_len(ic->i_cm_id->device, scat);
 
 			if (send->s_wr.opcode == IB_WR_RDMA_READ_WITH_INV)
@@ -928,7 +928,7 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	}
 
 	/* if we finished the message then send completion owns it */
-	if (scat == &op->r_sg[op->r_count])
+	if (scat == &op->op_sg[op->op_count])
 		first->s_wr.send_flags = IB_SEND_SIGNALED;
 
 	if (i < work_alloc) {
@@ -942,9 +942,9 @@ int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op)
 	 * adapters do not allow using the lkey for this at all.  To bypass this use a
 	 * fastreg_mr (or possibly a dma_mr)
 	 */
-	if (!op->r_write) {
+	if (!op->op_write) {
 		rds_iw_build_send_fastreg(rds_iwdev, ic, &ic->i_sends[fr_pos],
-			op->r_count, sent, conn->c_xmit_rm->m_rs->rs_user_addr);
+			op->op_count, sent, conn->c_xmit_rm->m_rs->rs_user_addr);
 		work_alloc++;
 	}
 

net/rds/message.c

@@ -69,10 +69,10 @@ static void rds_message_purge(struct rds_message *rm)
 	}
 	rm->data.m_nents = 0;
 
-	if (rm->rdma.m_rdma_op.r_active)
-		rds_rdma_free_op(&rm->rdma.m_rdma_op);
-	if (rm->rdma.m_rdma_mr)
-		rds_mr_put(rm->rdma.m_rdma_mr);
+	if (rm->rdma.op_active)
+		rds_rdma_free_op(&rm->rdma);
+	if (rm->rdma.op_rdma_mr)
+		rds_mr_put(rm->rdma.op_rdma_mr);
 
 	if (rm->atomic.op_active)
 		rds_atomic_free_op(&rm->atomic);

net/rds/rdma.c

@@ -440,26 +440,26 @@ void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force)
 	rds_mr_put(mr);
 }
 
-void rds_rdma_free_op(struct rds_rdma_op *ro)
+void rds_rdma_free_op(struct rm_rdma_op *ro)
 {
 	unsigned int i;
 
-	for (i = 0; i < ro->r_nents; i++) {
-		struct page *page = sg_page(&ro->r_sg[i]);
+	for (i = 0; i < ro->op_nents; i++) {
+		struct page *page = sg_page(&ro->op_sg[i]);
 
 		/* Mark page dirty if it was possibly modified, which
 		 * is the case for a RDMA_READ which copies from remote
 		 * to local memory */
-		if (!ro->r_write) {
+		if (!ro->op_write) {
 			BUG_ON(irqs_disabled());
 			set_page_dirty(page);
 		}
 		put_page(page);
 	}
 
-	kfree(ro->r_notifier);
-	ro->r_notifier = NULL;
-	ro->r_active = 0;
+	kfree(ro->op_notifier);
+	ro->op_notifier = NULL;
+	ro->op_active = 0;
 }
 
 void rds_atomic_free_op(struct rm_atomic_op *ao)
@@ -521,7 +521,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 {
 	struct rds_rdma_args *args;
 	struct rds_iovec vec;
-	struct rds_rdma_op *op = &rm->rdma.m_rdma_op;
+	struct rm_rdma_op *op = &rm->rdma;
 	unsigned int nr_pages;
 	unsigned int nr_bytes;
 	struct page **pages = NULL;
@@ -531,7 +531,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 	int ret = 0;
 
 	if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct rds_rdma_args))
-	    || rm->rdma.m_rdma_op.r_active)
+	    || rm->rdma.op_active)
 		return -EINVAL;
 
 	args = CMSG_DATA(cmsg);
@@ -556,27 +556,27 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 		goto out;
 	}
 
-	op->r_write = !!(args->flags & RDS_RDMA_READWRITE);
-	op->r_fence = !!(args->flags & RDS_RDMA_FENCE);
-	op->r_notify = !!(args->flags & RDS_RDMA_NOTIFY_ME);
-	op->r_active = 1;
-	op->r_recverr = rs->rs_recverr;
+	op->op_write = !!(args->flags & RDS_RDMA_READWRITE);
+	op->op_fence = !!(args->flags & RDS_RDMA_FENCE);
+	op->op_notify = !!(args->flags & RDS_RDMA_NOTIFY_ME);
+	op->op_active = 1;
+	op->op_recverr = rs->rs_recverr;
 	WARN_ON(!nr_pages);
-	op->r_sg = rds_message_alloc_sgs(rm, nr_pages);
+	op->op_sg = rds_message_alloc_sgs(rm, nr_pages);
 
-	if (op->r_notify || op->r_recverr) {
+	if (op->op_notify || op->op_recverr) {
 		/* We allocate an uninitialized notifier here, because
 		 * we don't want to do that in the completion handler. We
 		 * would have to use GFP_ATOMIC there, and don't want to deal
 		 * with failed allocations.
 		 */
-		op->r_notifier = kmalloc(sizeof(struct rds_notifier), GFP_KERNEL);
-		if (!op->r_notifier) {
+		op->op_notifier = kmalloc(sizeof(struct rds_notifier), GFP_KERNEL);
+		if (!op->op_notifier) {
 			ret = -ENOMEM;
 			goto out;
 		}
-		op->r_notifier->n_user_token = args->user_token;
-		op->r_notifier->n_status = RDS_RDMA_SUCCESS;
+		op->op_notifier->n_user_token = args->user_token;
+		op->op_notifier->n_status = RDS_RDMA_SUCCESS;
 	}
 
 	/* The cookie contains the R_Key of the remote memory region, and
@@ -586,15 +586,15 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 	 * destination address (which is really an offset into the MR)
 	 * FIXME: We may want to move this into ib_rdma.c
 	 */
-	op->r_key = rds_rdma_cookie_key(args->cookie);
-	op->r_remote_addr = args->remote_vec.addr + rds_rdma_cookie_offset(args->cookie);
+	op->op_rkey = rds_rdma_cookie_key(args->cookie);
+	op->op_remote_addr = args->remote_vec.addr + rds_rdma_cookie_offset(args->cookie);
 
 	nr_bytes = 0;
 
 	rdsdebug("RDS: rdma prepare nr_local %llu rva %llx rkey %x\n",
 	       (unsigned long long)args->nr_local,
 	       (unsigned long long)args->remote_vec.addr,
-	       op->r_key);
+	       op->op_rkey);
 
 	local_vec = (struct rds_iovec __user *)(unsigned long) args->local_vec_addr;
 
@@ -617,7 +617,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 		/* If it's a WRITE operation, we want to pin the pages for reading.
 		 * If it's a READ operation, we need to pin the pages for writing.
 		 */
-		ret = rds_pin_pages(vec.addr, nr, pages, !op->r_write);
+		ret = rds_pin_pages(vec.addr, nr, pages, !op->op_write);
 		if (ret < 0)
 			goto out;
 
@@ -630,7 +630,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 			unsigned int offset = vec.addr & ~PAGE_MASK;
 			struct scatterlist *sg;
 
-			sg = &op->r_sg[op->r_nents + j];
+			sg = &op->op_sg[op->op_nents + j];
 			sg_set_page(sg, pages[j],
 					min_t(unsigned int, vec.bytes, PAGE_SIZE - offset),
 					offset);
@@ -642,7 +642,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 			vec.bytes -= sg->length;
 		}
 
-		op->r_nents += nr;
+		op->op_nents += nr;
 	}
 
 	if (nr_bytes > args->remote_vec.bytes) {
@@ -652,7 +652,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 		ret = -EINVAL;
 		goto out;
 	}
-	op->r_bytes = nr_bytes;
+	op->op_bytes = nr_bytes;
 
 	ret = 0;
 out:
@@ -700,7 +700,7 @@ int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm,
 
 	if (mr) {
 		mr->r_trans->sync_mr(mr->r_trans_private, DMA_TO_DEVICE);
-		rm->rdma.m_rdma_mr = mr;
+		rm->rdma.op_rdma_mr = mr;
 	}
 	return err;
 }
@@ -718,7 +718,7 @@ int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm,
 	    rm->m_rdma_cookie != 0)
 		return -EINVAL;
 
-	return __rds_rdma_map(rs, CMSG_DATA(cmsg), &rm->m_rdma_cookie, &rm->rdma.m_rdma_mr);
+	return __rds_rdma_map(rs, CMSG_DATA(cmsg), &rm->m_rdma_cookie, &rm->rdma.op_rdma_mr);
 }
 
 /*

net/rds/rds.h

@@ -230,22 +230,6 @@ struct rds_mr {
 /* Flags for mr->r_state */
 #define RDS_MR_DEAD		0
 
-struct rds_rdma_op {
-	u32			r_key;
-	u64			r_remote_addr;
-	unsigned int		r_write:1;
-	unsigned int		r_fence:1;
-	unsigned int		r_notify:1;
-	unsigned int		r_recverr:1;
-	unsigned int		r_mapped:1;
-	unsigned int		r_active:1;
-	struct rds_notifier	*r_notifier;
-	unsigned int		r_bytes;
-	unsigned int		r_nents;
-	unsigned int		r_count;
-	struct scatterlist	*r_sg;
-};
-
 static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset)
 {
 	return r_key | (((u64) offset) << 32);
@@ -331,14 +315,27 @@ struct rds_message {
 			unsigned int		op_recverr:1;
 			unsigned int		op_mapped:1;
 			unsigned int		op_active:1;
-			struct rds_notifier	*op_notifier;
 			struct scatterlist	*op_sg;
+			struct rds_notifier	*op_notifier;
 
 			struct rds_mr		*op_rdma_mr;
 		} atomic;
 		struct rm_rdma_op {
-			struct rds_rdma_op	m_rdma_op;
-			struct rds_mr		*m_rdma_mr;
+			u32			op_rkey;
+			u64			op_remote_addr;
+			unsigned int		op_write:1;
+			unsigned int		op_fence:1;
+			unsigned int		op_notify:1;
+			unsigned int		op_recverr:1;
+			unsigned int		op_mapped:1;
+			unsigned int		op_active:1;
+			unsigned int		op_bytes;
+			unsigned int		op_nents;
+			unsigned int		op_count;
+			struct scatterlist	*op_sg;
+			struct rds_notifier	*op_notifier;
+
+			struct rds_mr		*op_rdma_mr;
 		} rdma;
 		struct rm_data_op {
 			unsigned int		op_active:1;
@@ -418,7 +415,7 @@ struct rds_transport {
 		    unsigned int hdr_off, unsigned int sg, unsigned int off);
 	int (*xmit_cong_map)(struct rds_connection *conn,
 			     struct rds_cong_map *map, unsigned long offset);
-	int (*xmit_rdma)(struct rds_connection *conn, struct rds_rdma_op *op);
+	int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op);
 	int (*xmit_atomic)(struct rds_connection *conn, struct rds_message *rm);
 	int (*recv)(struct rds_connection *conn);
 	int (*inc_copy_to_user)(struct rds_incoming *inc, struct iovec *iov,
@@ -727,7 +724,7 @@ int rds_send_acked_before(struct rds_connection *conn, u64 seq);
 void rds_send_remove_from_sock(struct list_head *messages, int status);
 int rds_send_pong(struct rds_connection *conn, __be16 dport);
 struct rds_message *rds_send_get_message(struct rds_connection *,
-					 struct rds_rdma_op *);
+					 struct rm_rdma_op *);
 
 /* rdma.c */
 void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force);
@@ -744,7 +741,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 			  struct cmsghdr *cmsg);
 int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm,
 			  struct cmsghdr *cmsg);
-void rds_rdma_free_op(struct rds_rdma_op *ro);
+void rds_rdma_free_op(struct rm_rdma_op *ro);
 void rds_atomic_free_op(struct rm_atomic_op *ao);
 void rds_rdma_send_complete(struct rds_message *rm, int wc_status);
 void rds_atomic_send_complete(struct rds_message *rm, int wc_status);

net/rds/send.c

@@ -237,7 +237,7 @@ int rds_send_xmit(struct rds_connection *conn)
 			 * connection.
 			 * Therefore, we never retransmit messages with RDMA ops.
 			 */
-			if (rm->rdma.m_rdma_op.r_active &&
+			if (rm->rdma.op_active &&
 			    test_bit(RDS_MSG_RETRANSMITTED, &rm->m_flags)) {
 				spin_lock_irqsave(&conn->c_lock, flags);
 				if (test_and_clear_bit(RDS_MSG_ON_CONN, &rm->m_flags))
@@ -280,8 +280,8 @@ int rds_send_xmit(struct rds_connection *conn)
 		 * keep this simple and require that the transport either
 		 * send the whole rdma or none of it.
 		 */
-		if (rm->rdma.m_rdma_op.r_active && !conn->c_xmit_rdma_sent) {
-			ret = conn->c_trans->xmit_rdma(conn, &rm->rdma.m_rdma_op);
+		if (rm->rdma.op_active && !conn->c_xmit_rdma_sent) {
+			ret = conn->c_trans->xmit_rdma(conn, &rm->rdma);
 			if (ret)
 				break;
 			conn->c_xmit_rdma_sent = 1;
@@ -430,16 +430,16 @@ int rds_send_acked_before(struct rds_connection *conn, u64 seq)
 void rds_rdma_send_complete(struct rds_message *rm, int status)
 {
 	struct rds_sock *rs = NULL;
-	struct rds_rdma_op *ro;
+	struct rm_rdma_op *ro;
 	struct rds_notifier *notifier;
 	unsigned long flags;
 
 	spin_lock_irqsave(&rm->m_rs_lock, flags);
 
-	ro = &rm->rdma.m_rdma_op;
+	ro = &rm->rdma;
 	if (test_bit(RDS_MSG_ON_SOCK, &rm->m_flags) &&
-	    ro->r_active && ro->r_notify && ro->r_notifier) {
-		notifier = ro->r_notifier;
+	    ro->op_active && ro->op_notify && ro->op_notifier) {
+		notifier = ro->op_notifier;
 		rs = rm->m_rs;
 		sock_hold(rds_rs_to_sk(rs));
 
@@ -448,7 +448,7 @@ void rds_rdma_send_complete(struct rds_message *rm, int status)
 		list_add_tail(&notifier->n_list, &rs->rs_notify_queue);
 		spin_unlock(&rs->rs_lock);
 
-		ro->r_notifier = NULL;
+		ro->op_notifier = NULL;
 	}
 
 	spin_unlock_irqrestore(&rm->m_rs_lock, flags);
@@ -503,13 +503,13 @@ EXPORT_SYMBOL_GPL(rds_atomic_send_complete);
 static inline void
 __rds_rdma_send_complete(struct rds_sock *rs, struct rds_message *rm, int status)
 {
-	struct rds_rdma_op *ro;
+	struct rm_rdma_op *ro;
 
-	ro = &rm->rdma.m_rdma_op;
-	if (ro->r_active && ro->r_notify && ro->r_notifier) {
-		ro->r_notifier->n_status = status;
-		list_add_tail(&ro->r_notifier->n_list, &rs->rs_notify_queue);
-		ro->r_notifier = NULL;
+	ro = &rm->rdma;
+	if (ro->op_active && ro->op_notify && ro->op_notifier) {
+		ro->op_notifier->n_status = status;
+		list_add_tail(&ro->op_notifier->n_list, &rs->rs_notify_queue);
+		ro->op_notifier = NULL;
 	}
 
 	/* No need to wake the app - caller does this */
@@ -521,7 +521,7 @@ __rds_rdma_send_complete(struct rds_sock *rs, struct rds_message *rm, int status
  * So speed is not an issue here.
  */
 struct rds_message *rds_send_get_message(struct rds_connection *conn,
-					 struct rds_rdma_op *op)
+					 struct rm_rdma_op *op)
 {
 	struct rds_message *rm, *tmp, *found = NULL;
 	unsigned long flags;
@@ -529,7 +529,7 @@ struct rds_message *rds_send_get_message(struct rds_connection *conn,
 	spin_lock_irqsave(&conn->c_lock, flags);
 
 	list_for_each_entry_safe(rm, tmp, &conn->c_retrans, m_conn_item) {
-		if (&rm->rdma.m_rdma_op == op) {
+		if (&rm->rdma == op) {
 			atomic_inc(&rm->m_refcount);
 			found = rm;
 			goto out;
@@ -537,7 +537,7 @@ struct rds_message *rds_send_get_message(struct rds_connection *conn,
 	}
 
 	list_for_each_entry_safe(rm, tmp, &conn->c_send_queue, m_conn_item) {
-		if (&rm->rdma.m_rdma_op == op) {
+		if (&rm->rdma == op) {
 			atomic_inc(&rm->m_refcount);
 			found = rm;
 			break;
@@ -597,20 +597,20 @@ void rds_send_remove_from_sock(struct list_head *messages, int status)
 		spin_lock(&rs->rs_lock);
 
 		if (test_and_clear_bit(RDS_MSG_ON_SOCK, &rm->m_flags)) {
-			struct rds_rdma_op *ro = &rm->rdma.m_rdma_op;
+			struct rm_rdma_op *ro = &rm->rdma;
 			struct rds_notifier *notifier;
 
 			list_del_init(&rm->m_sock_item);
 			rds_send_sndbuf_remove(rs, rm);
 
-			if (ro->r_active && ro->r_notifier &&
-			    (ro->r_notify || (ro->r_recverr && status))) {
-				notifier = ro->r_notifier;
+			if (ro->op_active && ro->op_notifier &&
+			       (ro->op_notify || (ro->op_recverr && status))) {
+				notifier = ro->op_notifier;
 				list_add_tail(&notifier->n_list,
 						&rs->rs_notify_queue);
 				if (!notifier->n_status)
 					notifier->n_status = status;
-				rm->rdma.m_rdma_op.r_notifier = NULL;
+				rm->rdma.op_notifier = NULL;
 			}
 			was_on_sock = 1;
 			rm->m_rs = NULL;
@@ -987,11 +987,11 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
 	if (ret)
 		goto out;
 
-	if ((rm->m_rdma_cookie || rm->rdma.m_rdma_op.r_active) &&
+	if ((rm->m_rdma_cookie || rm->rdma.op_active) &&
 	    !conn->c_trans->xmit_rdma) {
 		if (printk_ratelimit())
 			printk(KERN_NOTICE "rdma_op %p conn xmit_rdma %p\n",
-			       &rm->rdma.m_rdma_op, conn->c_trans->xmit_rdma);
+			       &rm->rdma, conn->c_trans->xmit_rdma);
 		ret = -EOPNOTSUPP;
 		goto out;
 	}