[mirror_ubuntu-zesty-kernel.git] / drivers / staging / lustre / lnet / selftest / brw_test.c

/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2015, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lnet/selftest/brw_test.c
 *
 * Author: Isaac Huang <isaac@clusterfs.com>
 */

#include "selftest.h"

static int brw_srv_workitems = SFW_TEST_WI_MAX;
module_param(brw_srv_workitems, int, 0644);
MODULE_PARM_DESC(brw_srv_workitems, "# BRW server workitems");

static int brw_inject_errors;
module_param(brw_inject_errors, int, 0644);
MODULE_PARM_DESC(brw_inject_errors, "# data errors to inject randomly, zero by default");

static void
brw_client_fini(sfw_test_instance_t *tsi)
{
	srpc_bulk_t     *bulk;
	sfw_test_unit_t *tsu;

	LASSERT(tsi->tsi_is_client);

	list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
		bulk = tsu->tsu_private;
		if (!bulk)
			continue;

		srpc_free_bulk(bulk);
		tsu->tsu_private = NULL;
	}
}

static int
brw_client_init(sfw_test_instance_t *tsi)
{
	sfw_session_t	 *sn = tsi->tsi_batch->bat_session;
	int		  flags;
	int		  npg;
	int		  len;
	int		  opc;
	srpc_bulk_t	 *bulk;
	sfw_test_unit_t	 *tsu;

	LASSERT(sn);
	LASSERT(tsi->tsi_is_client);

	if (!(sn->sn_features & LST_FEAT_BULK_LEN)) {
		test_bulk_req_t  *breq = &tsi->tsi_u.bulk_v0;

		opc   = breq->blk_opc;
		flags = breq->blk_flags;
		npg   = breq->blk_npg;
		/*
		 * NB: this is not going to work for variable page size,
		 * but we have to keep it for compatibility
		 */
		len   = npg * PAGE_CACHE_SIZE;

	} else {
		test_bulk_req_v1_t *breq = &tsi->tsi_u.bulk_v1;

		/*
		 * I should never get this step if it's unknown feature
		 * because make_session will reject unknown feature
		 */
		LASSERT(!(sn->sn_features & ~LST_FEATS_MASK));

		opc   = breq->blk_opc;
		flags = breq->blk_flags;
		len   = breq->blk_len;
		npg   = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	}

	if (npg > LNET_MAX_IOV || npg <= 0)
		return -EINVAL;

	if (opc != LST_BRW_READ && opc != LST_BRW_WRITE)
		return -EINVAL;

	if (flags != LST_BRW_CHECK_NONE &&
	    flags != LST_BRW_CHECK_FULL && flags != LST_BRW_CHECK_SIMPLE)
		return -EINVAL;

	list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
		bulk = srpc_alloc_bulk(lnet_cpt_of_nid(tsu->tsu_dest.nid),
				       npg, len, opc == LST_BRW_READ);
		if (!bulk) {
			brw_client_fini(tsi);
			return -ENOMEM;
		}

		tsu->tsu_private = bulk;
	}

	return 0;
}

#define BRW_POISON      0xbeefbeefbeefbeefULL
#define BRW_MAGIC       0xeeb0eeb1eeb2eeb3ULL
#define BRW_MSIZE       sizeof(__u64)

static int
brw_inject_one_error(void)
{
	struct timespec64 ts;

	if (brw_inject_errors <= 0)
		return 0;

	ktime_get_ts64(&ts);

	if (!((ts.tv_nsec / NSEC_PER_USEC) & 1))
		return 0;

	return brw_inject_errors--;
}

static void
brw_fill_page(struct page *pg, int pattern, __u64 magic)
{
	char *addr = page_address(pg);
	int   i;

	LASSERT(addr);

	if (pattern == LST_BRW_CHECK_NONE)
		return;

	if (magic == BRW_MAGIC)
		magic += brw_inject_one_error();

	if (pattern == LST_BRW_CHECK_SIMPLE) {
		memcpy(addr, &magic, BRW_MSIZE);
		addr += PAGE_CACHE_SIZE - BRW_MSIZE;
		memcpy(addr, &magic, BRW_MSIZE);
		return;
	}

	if (pattern == LST_BRW_CHECK_FULL) {
		for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++)
			memcpy(addr + i * BRW_MSIZE, &magic, BRW_MSIZE);
		return;
	}

	LBUG();
}

static int
brw_check_page(struct page *pg, int pattern, __u64 magic)
{
	char  *addr = page_address(pg);
	__u64  data = 0; /* make compiler happy */
	int    i;

	LASSERT(addr);

	if (pattern == LST_BRW_CHECK_NONE)
		return 0;

	if (pattern == LST_BRW_CHECK_SIMPLE) {
		data = *((__u64 *) addr);
		if (data != magic)
			goto bad_data;

		addr += PAGE_CACHE_SIZE - BRW_MSIZE;
		data = *((__u64 *) addr);
		if (data != magic)
			goto bad_data;

		return 0;
	}

	if (pattern == LST_BRW_CHECK_FULL) {
		for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++) {
			data = *(((__u64 *) addr) + i);
			if (data != magic)
				goto bad_data;
		}

		return 0;
	}

	LBUG();

bad_data:
	CERROR("Bad data in page %p: %#llx, %#llx expected\n",
	       pg, data, magic);
	return 1;
}

static void
brw_fill_bulk(srpc_bulk_t *bk, int pattern, __u64 magic)
{
	int i;
	struct page *pg;

	for (i = 0; i < bk->bk_niov; i++) {
		pg = bk->bk_iovs[i].kiov_page;
		brw_fill_page(pg, pattern, magic);
	}
}

static int
brw_check_bulk(srpc_bulk_t *bk, int pattern, __u64 magic)
{
	int i;
	struct page *pg;

	for (i = 0; i < bk->bk_niov; i++) {
		pg = bk->bk_iovs[i].kiov_page;
		if (brw_check_page(pg, pattern, magic)) {
			CERROR("Bulk page %p (%d/%d) is corrupted!\n",
			       pg, i, bk->bk_niov);
			return 1;
		}
	}

	return 0;
}

static int
brw_client_prep_rpc(sfw_test_unit_t *tsu,
		    lnet_process_id_t dest, srpc_client_rpc_t **rpcpp)
{
	srpc_bulk_t *bulk = tsu->tsu_private;
	sfw_test_instance_t *tsi = tsu->tsu_instance;
	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	srpc_client_rpc_t *rpc;
	srpc_brw_reqst_t *req;
	int flags;
	int npg;
	int len;
	int opc;
	int rc;

	LASSERT(sn);
	LASSERT(bulk);

	if (!(sn->sn_features & LST_FEAT_BULK_LEN)) {
		test_bulk_req_t *breq = &tsi->tsi_u.bulk_v0;

		opc   = breq->blk_opc;
		flags = breq->blk_flags;
		npg   = breq->blk_npg;
		len   = npg * PAGE_CACHE_SIZE;

	} else {
		test_bulk_req_v1_t *breq = &tsi->tsi_u.bulk_v1;

		/*
		 * I should never get this step if it's unknown feature
		 * because make_session will reject unknown feature
		 */
		LASSERT(!(sn->sn_features & ~LST_FEATS_MASK));

		opc   = breq->blk_opc;
		flags = breq->blk_flags;
		len   = breq->blk_len;
		npg   = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	}

	rc = sfw_create_test_rpc(tsu, dest, sn->sn_features, npg, len, &rpc);
	if (rc)
		return rc;

	memcpy(&rpc->crpc_bulk, bulk, offsetof(srpc_bulk_t, bk_iovs[npg]));
	if (opc == LST_BRW_WRITE)
		brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_MAGIC);
	else
		brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_POISON);

	req = &rpc->crpc_reqstmsg.msg_body.brw_reqst;
	req->brw_flags = flags;
	req->brw_rw    = opc;
	req->brw_len   = len;

	*rpcpp = rpc;
	return 0;
}

static void
brw_client_done_rpc(sfw_test_unit_t *tsu, srpc_client_rpc_t *rpc)
{
	__u64 magic = BRW_MAGIC;
	sfw_test_instance_t *tsi = tsu->tsu_instance;
	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	srpc_msg_t *msg = &rpc->crpc_replymsg;
	srpc_brw_reply_t *reply = &msg->msg_body.brw_reply;
	srpc_brw_reqst_t *reqst = &rpc->crpc_reqstmsg.msg_body.brw_reqst;

	LASSERT(sn);

	if (rpc->crpc_status) {
		CERROR("BRW RPC to %s failed with %d\n",
		       libcfs_id2str(rpc->crpc_dest), rpc->crpc_status);
		if (!tsi->tsi_stopping) /* rpc could have been aborted */
			atomic_inc(&sn->sn_brw_errors);
		goto out;
	}

	if (msg->msg_magic != SRPC_MSG_MAGIC) {
		__swab64s(&magic);
		__swab32s(&reply->brw_status);
	}

	CDEBUG(reply->brw_status ? D_WARNING : D_NET,
	       "BRW RPC to %s finished with brw_status: %d\n",
	       libcfs_id2str(rpc->crpc_dest), reply->brw_status);

	if (reply->brw_status) {
		atomic_inc(&sn->sn_brw_errors);
		rpc->crpc_status = -(int)reply->brw_status;
		goto out;
	}

	if (reqst->brw_rw == LST_BRW_WRITE)
		goto out;

	if (brw_check_bulk(&rpc->crpc_bulk, reqst->brw_flags, magic)) {
		CERROR("Bulk data from %s is corrupted!\n",
		       libcfs_id2str(rpc->crpc_dest));
		atomic_inc(&sn->sn_brw_errors);
		rpc->crpc_status = -EBADMSG;
	}

out:
	return;
}

static void
brw_server_rpc_done(struct srpc_server_rpc *rpc)
{
	srpc_bulk_t *blk = rpc->srpc_bulk;

	if (!blk)
		return;

	if (rpc->srpc_status)
		CERROR("Bulk transfer %s %s has failed: %d\n",
		       blk->bk_sink ? "from" : "to",
		       libcfs_id2str(rpc->srpc_peer), rpc->srpc_status);
	else
		CDEBUG(D_NET, "Transferred %d pages bulk data %s %s\n",
		       blk->bk_niov, blk->bk_sink ? "from" : "to",
		       libcfs_id2str(rpc->srpc_peer));

	sfw_free_pages(rpc);
}

static int
brw_bulk_ready(struct srpc_server_rpc *rpc, int status)
{
	__u64 magic = BRW_MAGIC;
	srpc_brw_reply_t *reply = &rpc->srpc_replymsg.msg_body.brw_reply;
	srpc_brw_reqst_t *reqst;
	srpc_msg_t *reqstmsg;

	LASSERT(rpc->srpc_bulk);
	LASSERT(rpc->srpc_reqstbuf);

	reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
	reqst = &reqstmsg->msg_body.brw_reqst;

	if (status) {
		CERROR("BRW bulk %s failed for RPC from %s: %d\n",
		       reqst->brw_rw == LST_BRW_READ ? "READ" : "WRITE",
		       libcfs_id2str(rpc->srpc_peer), status);
		return -EIO;
	}

	if (reqst->brw_rw == LST_BRW_READ)
		return 0;

	if (reqstmsg->msg_magic != SRPC_MSG_MAGIC)
		__swab64s(&magic);

	if (brw_check_bulk(rpc->srpc_bulk, reqst->brw_flags, magic)) {
		CERROR("Bulk data from %s is corrupted!\n",
		       libcfs_id2str(rpc->srpc_peer));
		reply->brw_status = EBADMSG;
	}

	return 0;
}

static int
brw_server_handle(struct srpc_server_rpc *rpc)
{
	struct srpc_service *sv = rpc->srpc_scd->scd_svc;
	srpc_msg_t *replymsg = &rpc->srpc_replymsg;
	srpc_msg_t *reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
	srpc_brw_reply_t *reply = &replymsg->msg_body.brw_reply;
	srpc_brw_reqst_t *reqst = &reqstmsg->msg_body.brw_reqst;
	int npg;
	int rc;

	LASSERT(sv->sv_id == SRPC_SERVICE_BRW);

	if (reqstmsg->msg_magic != SRPC_MSG_MAGIC) {
		LASSERT(reqstmsg->msg_magic == __swab32(SRPC_MSG_MAGIC));

		__swab32s(&reqst->brw_rw);
		__swab32s(&reqst->brw_len);
		__swab32s(&reqst->brw_flags);
		__swab64s(&reqst->brw_rpyid);
		__swab64s(&reqst->brw_bulkid);
	}
	LASSERT(reqstmsg->msg_type == (__u32)srpc_service2request(sv->sv_id));

	reply->brw_status = 0;
	rpc->srpc_done = brw_server_rpc_done;

	if ((reqst->brw_rw != LST_BRW_READ && reqst->brw_rw != LST_BRW_WRITE) ||
	    (reqst->brw_flags != LST_BRW_CHECK_NONE &&
	     reqst->brw_flags != LST_BRW_CHECK_FULL &&
	     reqst->brw_flags != LST_BRW_CHECK_SIMPLE)) {
		reply->brw_status = EINVAL;
		return 0;
	}

	if (reqstmsg->msg_ses_feats & ~LST_FEATS_MASK) {
		replymsg->msg_ses_feats = LST_FEATS_MASK;
		reply->brw_status = EPROTO;
		return 0;
	}

	if (!(reqstmsg->msg_ses_feats & LST_FEAT_BULK_LEN)) {
		/* compat with old version */
		if (reqst->brw_len & ~CFS_PAGE_MASK) {
			reply->brw_status = EINVAL;
			return 0;
		}
		npg = reqst->brw_len >> PAGE_CACHE_SHIFT;

	} else {
		npg = (reqst->brw_len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	}

	replymsg->msg_ses_feats = reqstmsg->msg_ses_feats;

	if (!reqst->brw_len || npg > LNET_MAX_IOV) {
		reply->brw_status = EINVAL;
		return 0;
	}

	rc = sfw_alloc_pages(rpc, rpc->srpc_scd->scd_cpt, npg,
			     reqst->brw_len,
			     reqst->brw_rw == LST_BRW_WRITE);
	if (rc)
		return rc;

	if (reqst->brw_rw == LST_BRW_READ)
		brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_MAGIC);
	else
		brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_POISON);

	return 0;
}

sfw_test_client_ops_t brw_test_client;
void brw_init_test_client(void)
{
	brw_test_client.tso_init     = brw_client_init;
	brw_test_client.tso_fini     = brw_client_fini;
	brw_test_client.tso_prep_rpc = brw_client_prep_rpc;
	brw_test_client.tso_done_rpc = brw_client_done_rpc;
};

srpc_service_t brw_test_service;
void brw_init_test_service(void)
{
	brw_test_service.sv_id         = SRPC_SERVICE_BRW;
	brw_test_service.sv_name       = "brw_test";
	brw_test_service.sv_handler    = brw_server_handle;
	brw_test_service.sv_bulk_ready = brw_bulk_ready;
	brw_test_service.sv_wi_total   = brw_srv_workitems;
}
Commit	Line	Data
d7e09d03 PT	1	/*
	2	* GPL HEADER START
	3	*
	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License version 2 for more details (a copy is included
	14	* in the LICENSE file that accompanied this code).
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* version 2 along with this program; If not, see
	18	* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
	19	*
	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	21	* CA 95054 USA or visit www.sun.com if you need additional information or
	22	* have any questions.
	23	*
	24	* GPL HEADER END
	25	*/
	26	/*
	27	* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
	28	* Use is subject to license terms.
	29	*
1dc563a6	30	* Copyright (c) 2011, 2015, Intel Corporation.
d7e09d03 PT	31	*/
	32	/*
	33	* This file is part of Lustre, http://www.lustre.org/
	34	* Lustre is a trademark of Sun Microsystems, Inc.
	35	*
	36	* lnet/selftest/brw_test.c
	37	*
	38	* Author: Isaac Huang <isaac@clusterfs.com>
	39	*/
	40
	41	#include "selftest.h"
	42
	43	static int brw_srv_workitems = SFW_TEST_WI_MAX;
8cc7b4b9 PT	44	module_param(brw_srv_workitems, int, 0644);
8cc7b4b9 PT	45	MODULE_PARM_DESC(brw_srv_workitems, "# BRW server workitems");
d7e09d03 PT	46
d7e09d03 PT	47	static int brw_inject_errors;
8cc7b4b9 PT	48	module_param(brw_inject_errors, int, 0644);
8cc7b4b9 PT	49	MODULE_PARM_DESC(brw_inject_errors, "# data errors to inject randomly, zero by default");
d7e09d03 PT	50
d7e09d03 PT	51	static void
5f849bb0	52	brw_client_fini(sfw_test_instance_t *tsi)
d7e09d03 PT	53	{
	54	srpc_bulk_t *bulk;
	55	sfw_test_unit_t *tsu;
	56
5f849bb0	57	LASSERT(tsi->tsi_is_client);
d7e09d03	58
5f849bb0	59	list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
d7e09d03	60	bulk = tsu->tsu_private;
06ace26e	61	if (!bulk)
5252bbfd	62	continue;
d7e09d03 PT	63
	64	srpc_free_bulk(bulk);
	65	tsu->tsu_private = NULL;
	66	}
	67	}
	68
d5bd0504	69	static int
5f849bb0	70	brw_client_init(sfw_test_instance_t *tsi)
d7e09d03 PT	71	{
	72	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	73	int flags;
	74	int npg;
	75	int len;
	76	int opc;
	77	srpc_bulk_t *bulk;
	78	sfw_test_unit_t *tsu;
	79
06ace26e	80	LASSERT(sn);
d7e09d03 PT	81	LASSERT(tsi->tsi_is_client);
d7e09d03 PT	82
5fd88337	83	if (!(sn->sn_features & LST_FEAT_BULK_LEN)) {
d7e09d03 PT	84	test_bulk_req_t *breq = &tsi->tsi_u.bulk_v0;
	85
	86	opc = breq->blk_opc;
	87	flags = breq->blk_flags;
	88	npg = breq->blk_npg;
4420cfd3 JS	89	/*
	90	* NB: this is not going to work for variable page size,
	91	* but we have to keep it for compatibility
	92	*/
d7e09d03 PT	93	len = npg * PAGE_CACHE_SIZE;
	94
	95	} else {
74d68011	96	test_bulk_req_v1_t *breq = &tsi->tsi_u.bulk_v1;
d7e09d03	97
4420cfd3 JS	98	/*
	99	* I should never get this step if it's unknown feature
	100	* because make_session will reject unknown feature
	101	*/
5fd88337	102	LASSERT(!(sn->sn_features & ~LST_FEATS_MASK));
d7e09d03 PT	103
	104	opc = breq->blk_opc;
	105	flags = breq->blk_flags;
	106	len = breq->blk_len;
	107	npg = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	108	}
	109
	110	if (npg > LNET_MAX_IOV \|\| npg <= 0)
	111	return -EINVAL;
	112
	113	if (opc != LST_BRW_READ && opc != LST_BRW_WRITE)
	114	return -EINVAL;
	115
	116	if (flags != LST_BRW_CHECK_NONE &&
	117	flags != LST_BRW_CHECK_FULL && flags != LST_BRW_CHECK_SIMPLE)
	118	return -EINVAL;
	119
	120	list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
	121	bulk = srpc_alloc_bulk(lnet_cpt_of_nid(tsu->tsu_dest.nid),
	122	npg, len, opc == LST_BRW_READ);
06ace26e	123	if (!bulk) {
d7e09d03 PT	124	brw_client_fini(tsi);
	125	return -ENOMEM;
	126	}
	127
	128	tsu->tsu_private = bulk;
	129	}
	130
	131	return 0;
	132	}
	133
	134	#define BRW_POISON 0xbeefbeefbeefbeefULL
	135	#define BRW_MAGIC 0xeeb0eeb1eeb2eeb3ULL
	136	#define BRW_MSIZE sizeof(__u64)
	137
d4b2d88a	138	static int
5f849bb0	139	brw_inject_one_error(void)
d7e09d03	140	{
d9f79e6b	141	struct timespec64 ts;
d7e09d03	142
5252bbfd LN	143	if (brw_inject_errors <= 0)
5252bbfd LN	144	return 0;
d7e09d03	145
d9f79e6b	146	ktime_get_ts64(&ts);
d7e09d03	147
5fd88337	148	if (!((ts.tv_nsec / NSEC_PER_USEC) & 1))
5252bbfd	149	return 0;
d7e09d03 PT	150
	151	return brw_inject_errors--;
	152	}
	153
2e3e133d	154	static void
5f849bb0	155	brw_fill_page(struct page *pg, int pattern, __u64 magic)
d7e09d03 PT	156	{
	157	char *addr = page_address(pg);
	158	int i;
	159
06ace26e	160	LASSERT(addr);
d7e09d03	161
5252bbfd LN	162	if (pattern == LST_BRW_CHECK_NONE)
5252bbfd LN	163	return;
d7e09d03 PT	164
	165	if (magic == BRW_MAGIC)
	166	magic += brw_inject_one_error();
	167
	168	if (pattern == LST_BRW_CHECK_SIMPLE) {
	169	memcpy(addr, &magic, BRW_MSIZE);
	170	addr += PAGE_CACHE_SIZE - BRW_MSIZE;
	171	memcpy(addr, &magic, BRW_MSIZE);
	172	return;
	173	}
	174
	175	if (pattern == LST_BRW_CHECK_FULL) {
	176	for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++)
	177	memcpy(addr + i * BRW_MSIZE, &magic, BRW_MSIZE);
	178	return;
	179	}
	180
5f849bb0	181	LBUG();
d7e09d03 PT	182	}
d7e09d03 PT	183
43311238	184	static int
5f849bb0	185	brw_check_page(struct page *pg, int pattern, __u64 magic)
d7e09d03 PT	186	{
	187	char *addr = page_address(pg);
	188	__u64 data = 0; /* make compiler happy */
	189	int i;
	190
06ace26e	191	LASSERT(addr);
d7e09d03 PT	192
	193	if (pattern == LST_BRW_CHECK_NONE)
	194	return 0;
	195
	196	if (pattern == LST_BRW_CHECK_SIMPLE) {
	197	data = ((__u64 ) addr);
5252bbfd LN	198	if (data != magic)
5252bbfd LN	199	goto bad_data;
d7e09d03 PT	200
	201	addr += PAGE_CACHE_SIZE - BRW_MSIZE;
	202	data = ((__u64 ) addr);
5252bbfd LN	203	if (data != magic)
5252bbfd LN	204	goto bad_data;
d7e09d03 PT	205
	206	return 0;
	207	}
	208
	209	if (pattern == LST_BRW_CHECK_FULL) {
	210	for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++) {
	211	data = (((__u64 ) addr) + i);
5252bbfd LN	212	if (data != magic)
5252bbfd LN	213	goto bad_data;
d7e09d03 PT	214	}
	215
	216	return 0;
	217	}
	218
5f849bb0	219	LBUG();
d7e09d03 PT	220
d7e09d03 PT	221	bad_data:
55f5a824	222	CERROR("Bad data in page %p: %#llx, %#llx expected\n",
c314c319	223	pg, data, magic);
d7e09d03 PT	224	return 1;
	225	}
	226
56e1ccac	227	static void
5f849bb0	228	brw_fill_bulk(srpc_bulk_t *bk, int pattern, __u64 magic)
d7e09d03	229	{
74d68011	230	int i;
d7e09d03 PT	231	struct page *pg;
	232
	233	for (i = 0; i < bk->bk_niov; i++) {
	234	pg = bk->bk_iovs[i].kiov_page;
	235	brw_fill_page(pg, pattern, magic);
	236	}
	237	}
	238
ec17e811	239	static int
5f849bb0	240	brw_check_bulk(srpc_bulk_t *bk, int pattern, __u64 magic)
d7e09d03	241	{
74d68011	242	int i;
d7e09d03 PT	243	struct page *pg;
	244
	245	for (i = 0; i < bk->bk_niov; i++) {
	246	pg = bk->bk_iovs[i].kiov_page;
5fd88337	247	if (brw_check_page(pg, pattern, magic)) {
5f849bb0	248	CERROR("Bulk page %p (%d/%d) is corrupted!\n",
c314c319	249	pg, i, bk->bk_niov);
d7e09d03 PT	250	return 1;
	251	}
	252	}
	253
	254	return 0;
	255	}
	256
	257	static int
5f849bb0	258	brw_client_prep_rpc(sfw_test_unit_t *tsu,
c314c319	259	lnet_process_id_t dest, srpc_client_rpc_t **rpcpp)
d7e09d03	260	{
74d68011	261	srpc_bulk_t *bulk = tsu->tsu_private;
d7e09d03	262	sfw_test_instance_t *tsi = tsu->tsu_instance;
74d68011 MS	263	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	264	srpc_client_rpc_t *rpc;
	265	srpc_brw_reqst_t *req;
	266	int flags;
	267	int npg;
	268	int len;
	269	int opc;
	270	int rc;
d7e09d03	271
06ace26e JS	272	LASSERT(sn);
06ace26e JS	273	LASSERT(bulk);
d7e09d03	274
5fd88337	275	if (!(sn->sn_features & LST_FEAT_BULK_LEN)) {
d7e09d03 PT	276	test_bulk_req_t *breq = &tsi->tsi_u.bulk_v0;
	277
	278	opc = breq->blk_opc;
	279	flags = breq->blk_flags;
	280	npg = breq->blk_npg;
	281	len = npg * PAGE_CACHE_SIZE;
	282
	283	} else {
74d68011	284	test_bulk_req_v1_t *breq = &tsi->tsi_u.bulk_v1;
d7e09d03	285
4420cfd3 JS	286	/*
	287	* I should never get this step if it's unknown feature
	288	* because make_session will reject unknown feature
	289	*/
5fd88337	290	LASSERT(!(sn->sn_features & ~LST_FEATS_MASK));
d7e09d03 PT	291
	292	opc = breq->blk_opc;
	293	flags = breq->blk_flags;
	294	len = breq->blk_len;
	295	npg = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	296	}
	297
	298	rc = sfw_create_test_rpc(tsu, dest, sn->sn_features, npg, len, &rpc);
5fd88337	299	if (rc)
d7e09d03 PT	300	return rc;
	301
	302	memcpy(&rpc->crpc_bulk, bulk, offsetof(srpc_bulk_t, bk_iovs[npg]));
	303	if (opc == LST_BRW_WRITE)
	304	brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_MAGIC);
	305	else
	306	brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_POISON);
	307
	308	req = &rpc->crpc_reqstmsg.msg_body.brw_reqst;
	309	req->brw_flags = flags;
	310	req->brw_rw = opc;
	311	req->brw_len = len;
	312
	313	*rpcpp = rpc;
	314	return 0;
	315	}
	316
	317	static void
5f849bb0	318	brw_client_done_rpc(sfw_test_unit_t tsu, srpc_client_rpc_t rpc)
d7e09d03	319	{
74d68011	320	__u64 magic = BRW_MAGIC;
d7e09d03	321	sfw_test_instance_t *tsi = tsu->tsu_instance;
74d68011 MS	322	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	323	srpc_msg_t *msg = &rpc->crpc_replymsg;
	324	srpc_brw_reply_t *reply = &msg->msg_body.brw_reply;
	325	srpc_brw_reqst_t *reqst = &rpc->crpc_reqstmsg.msg_body.brw_reqst;
d7e09d03	326
06ace26e	327	LASSERT(sn);
d7e09d03	328
5fd88337	329	if (rpc->crpc_status) {
5f849bb0	330	CERROR("BRW RPC to %s failed with %d\n",
c314c319	331	libcfs_id2str(rpc->crpc_dest), rpc->crpc_status);
d7e09d03 PT	332	if (!tsi->tsi_stopping) /* rpc could have been aborted */
	333	atomic_inc(&sn->sn_brw_errors);
	334	goto out;
	335	}
	336
	337	if (msg->msg_magic != SRPC_MSG_MAGIC) {
	338	__swab64s(&magic);
	339	__swab32s(&reply->brw_status);
	340	}
	341
5f849bb0	342	CDEBUG(reply->brw_status ? D_WARNING : D_NET,
c314c319 JS	343	"BRW RPC to %s finished with brw_status: %d\n",
c314c319 JS	344	libcfs_id2str(rpc->crpc_dest), reply->brw_status);
d7e09d03	345
5fd88337	346	if (reply->brw_status) {
d7e09d03 PT	347	atomic_inc(&sn->sn_brw_errors);
	348	rpc->crpc_status = -(int)reply->brw_status;
	349	goto out;
	350	}
	351
5252bbfd LN	352	if (reqst->brw_rw == LST_BRW_WRITE)
5252bbfd LN	353	goto out;
d7e09d03	354
5fd88337	355	if (brw_check_bulk(&rpc->crpc_bulk, reqst->brw_flags, magic)) {
5f849bb0	356	CERROR("Bulk data from %s is corrupted!\n",
c314c319	357	libcfs_id2str(rpc->crpc_dest));
d7e09d03 PT	358	atomic_inc(&sn->sn_brw_errors);
	359	rpc->crpc_status = -EBADMSG;
	360	}
	361
	362	out:
	363	return;
	364	}
	365
6888871c	366	static void
168c7a13	367	brw_server_rpc_done(struct srpc_server_rpc *rpc)
d7e09d03 PT	368	{
	369	srpc_bulk_t *blk = rpc->srpc_bulk;
	370
06ace26e	371	if (!blk)
5252bbfd	372	return;
d7e09d03	373
5fd88337	374	if (rpc->srpc_status)
5f849bb0	375	CERROR("Bulk transfer %s %s has failed: %d\n",
c314c319 JS	376	blk->bk_sink ? "from" : "to",
c314c319 JS	377	libcfs_id2str(rpc->srpc_peer), rpc->srpc_status);
d7e09d03	378	else
5f849bb0	379	CDEBUG(D_NET, "Transferred %d pages bulk data %s %s\n",
c314c319 JS	380	blk->bk_niov, blk->bk_sink ? "from" : "to",
c314c319 JS	381	libcfs_id2str(rpc->srpc_peer));
d7e09d03 PT	382
	383	sfw_free_pages(rpc);
	384	}
	385
0c05ef92	386	static int
168c7a13	387	brw_bulk_ready(struct srpc_server_rpc *rpc, int status)
d7e09d03	388	{
74d68011	389	__u64 magic = BRW_MAGIC;
d7e09d03 PT	390	srpc_brw_reply_t *reply = &rpc->srpc_replymsg.msg_body.brw_reply;
d7e09d03 PT	391	srpc_brw_reqst_t *reqst;
74d68011	392	srpc_msg_t *reqstmsg;
d7e09d03	393
06ace26e JS	394	LASSERT(rpc->srpc_bulk);
06ace26e JS	395	LASSERT(rpc->srpc_reqstbuf);
d7e09d03 PT	396
	397	reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
	398	reqst = &reqstmsg->msg_body.brw_reqst;
	399
5fd88337	400	if (status) {
5f849bb0	401	CERROR("BRW bulk %s failed for RPC from %s: %d\n",
c314c319 JS	402	reqst->brw_rw == LST_BRW_READ ? "READ" : "WRITE",
c314c319 JS	403	libcfs_id2str(rpc->srpc_peer), status);
d7e09d03 PT	404	return -EIO;
	405	}
	406
	407	if (reqst->brw_rw == LST_BRW_READ)
	408	return 0;
	409
	410	if (reqstmsg->msg_magic != SRPC_MSG_MAGIC)
	411	__swab64s(&magic);
	412
5fd88337	413	if (brw_check_bulk(rpc->srpc_bulk, reqst->brw_flags, magic)) {
5f849bb0	414	CERROR("Bulk data from %s is corrupted!\n",
c314c319	415	libcfs_id2str(rpc->srpc_peer));
d7e09d03 PT	416	reply->brw_status = EBADMSG;
	417	}
	418
	419	return 0;
	420	}
	421
4a1b86dc	422	static int
d7e09d03 PT	423	brw_server_handle(struct srpc_server_rpc *rpc)
d7e09d03 PT	424	{
74d68011 MS	425	struct srpc_service *sv = rpc->srpc_scd->scd_svc;
	426	srpc_msg_t *replymsg = &rpc->srpc_replymsg;
	427	srpc_msg_t *reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
d7e09d03 PT	428	srpc_brw_reply_t *reply = &replymsg->msg_body.brw_reply;
d7e09d03 PT	429	srpc_brw_reqst_t *reqst = &reqstmsg->msg_body.brw_reqst;
74d68011 MS	430	int npg;
74d68011 MS	431	int rc;
d7e09d03	432
5f849bb0	433	LASSERT(sv->sv_id == SRPC_SERVICE_BRW);
d7e09d03 PT	434
d7e09d03 PT	435	if (reqstmsg->msg_magic != SRPC_MSG_MAGIC) {
5f849bb0	436	LASSERT(reqstmsg->msg_magic == __swab32(SRPC_MSG_MAGIC));
d7e09d03 PT	437
	438	__swab32s(&reqst->brw_rw);
	439	__swab32s(&reqst->brw_len);
	440	__swab32s(&reqst->brw_flags);
	441	__swab64s(&reqst->brw_rpyid);
	442	__swab64s(&reqst->brw_bulkid);
	443	}
5f849bb0	444	LASSERT(reqstmsg->msg_type == (__u32)srpc_service2request(sv->sv_id));
d7e09d03 PT	445
	446	reply->brw_status = 0;
	447	rpc->srpc_done = brw_server_rpc_done;
	448
	449	if ((reqst->brw_rw != LST_BRW_READ && reqst->brw_rw != LST_BRW_WRITE) \|\|
	450	(reqst->brw_flags != LST_BRW_CHECK_NONE &&
	451	reqst->brw_flags != LST_BRW_CHECK_FULL &&
	452	reqst->brw_flags != LST_BRW_CHECK_SIMPLE)) {
	453	reply->brw_status = EINVAL;
	454	return 0;
	455	}
	456
5fd88337	457	if (reqstmsg->msg_ses_feats & ~LST_FEATS_MASK) {
d7e09d03 PT	458	replymsg->msg_ses_feats = LST_FEATS_MASK;
	459	reply->brw_status = EPROTO;
	460	return 0;
	461	}
	462
5fd88337	463	if (!(reqstmsg->msg_ses_feats & LST_FEAT_BULK_LEN)) {
d7e09d03	464	/* compat with old version */
5fd88337	465	if (reqst->brw_len & ~CFS_PAGE_MASK) {
d7e09d03 PT	466	reply->brw_status = EINVAL;
	467	return 0;
	468	}
	469	npg = reqst->brw_len >> PAGE_CACHE_SHIFT;
	470
	471	} else {
	472	npg = (reqst->brw_len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	473	}
	474
	475	replymsg->msg_ses_feats = reqstmsg->msg_ses_feats;
	476
5fd88337	477	if (!reqst->brw_len \|\| npg > LNET_MAX_IOV) {
d7e09d03 PT	478	reply->brw_status = EINVAL;
	479	return 0;
	480	}
	481
	482	rc = sfw_alloc_pages(rpc, rpc->srpc_scd->scd_cpt, npg,
	483	reqst->brw_len,
	484	reqst->brw_rw == LST_BRW_WRITE);
5fd88337	485	if (rc)
d7e09d03 PT	486	return rc;
	487
	488	if (reqst->brw_rw == LST_BRW_READ)
	489	brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_MAGIC);
	490	else
	491	brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_POISON);
	492
	493	return 0;
	494	}
	495
	496	sfw_test_client_ops_t brw_test_client;
	497	void brw_init_test_client(void)
	498	{
74d68011 MS	499	brw_test_client.tso_init = brw_client_init;
	500	brw_test_client.tso_fini = brw_client_fini;
	501	brw_test_client.tso_prep_rpc = brw_client_prep_rpc;
	502	brw_test_client.tso_done_rpc = brw_client_done_rpc;
d7e09d03 PT	503	};
	504
	505	srpc_service_t brw_test_service;
	506	void brw_init_test_service(void)
	507	{
74d68011	508	brw_test_service.sv_id = SRPC_SERVICE_BRW;
d7e09d03 PT	509	brw_test_service.sv_name = "brw_test";
	510	brw_test_service.sv_handler = brw_server_handle;
	511	brw_test_service.sv_bulk_ready = brw_bulk_ready;
	512	brw_test_service.sv_wi_total = brw_srv_workitems;
	513	}