[deliverable/linux.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, 2012, 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;
CFS_MODULE_PARM(brw_srv_workitems, "i", int, 0644, "# BRW server workitems");

static int brw_inject_errors;
CFS_MODULE_PARM(brw_inject_errors, "i", int, 0644,
		"# 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 == NULL)
			continue;

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

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 != NULL);
	LASSERT(tsi->tsi_is_client);

	if ((sn->sn_features & LST_FEAT_BULK_LEN) == 0) {
		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) == 0);

		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 == NULL) {
			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)

int
brw_inject_one_error(void)
{
	struct timeval tv;

	if (brw_inject_errors <= 0)
		return 0;

	do_gettimeofday(&tv);

	if ((tv.tv_usec & 1) == 0)
		return 0;

	return brw_inject_errors--;
}

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

	LASSERT(addr != NULL);

	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();
	return;
}

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 != NULL);

	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: "LPX64", "LPX64" expected\n",
		pg, data, magic);
	return 1;
}

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);
	}
}

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) != 0) {
			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 != NULL);
	LASSERT(bulk != NULL);

	if ((sn->sn_features & LST_FEAT_BULK_LEN) == 0) {
		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) == 0);

		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 != 0)
		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 != NULL);

	if (rpc->crpc_status != 0) {
		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 != 0) {
		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) != 0) {
		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;
}

void
brw_server_rpc_done(srpc_server_rpc_t *rpc)
{
	srpc_bulk_t *blk = rpc->srpc_bulk;

	if (blk == NULL)
		return;

	if (rpc->srpc_status != 0)
		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);
}

int
brw_bulk_ready(srpc_server_rpc_t *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 != NULL);
	LASSERT(rpc->srpc_reqstbuf != NULL);

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

	if (status != 0) {
		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) != 0) {
		CERROR("Bulk data from %s is corrupted!\n",
			libcfs_id2str(rpc->srpc_peer));
		reply->brw_status = EBADMSG;
	}

	return 0;
}

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) != 0) {
		replymsg->msg_ses_feats = LST_FEATS_MASK;
		reply->brw_status = EPROTO;
		return 0;
	}

	if ((reqstmsg->msg_ses_feats & LST_FEAT_BULK_LEN) == 0) {
		/* compat with old version */
		if ((reqst->brw_len & ~CFS_PAGE_MASK) != 0) {
			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 == 0 || 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 != 0)
		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	*
	30	* Copyright (c) 2011, 2012, Intel Corporation.
	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;
	44	CFS_MODULE_PARM(brw_srv_workitems, "i", int, 0644, "# BRW server workitems");
	45
	46	static int brw_inject_errors;
	47	CFS_MODULE_PARM(brw_inject_errors, "i", int, 0644,
	48	"# data errors to inject randomly, zero by default");
	49
	50	static void
5f849bb0	51	brw_client_fini(sfw_test_instance_t *tsi)
d7e09d03 PT	52	{
	53	srpc_bulk_t *bulk;
	54	sfw_test_unit_t *tsu;
	55
5f849bb0	56	LASSERT(tsi->tsi_is_client);
d7e09d03	57
5f849bb0	58	list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
d7e09d03	59	bulk = tsu->tsu_private;
5252bbfd LN	60	if (bulk == NULL)
5252bbfd LN	61	continue;
d7e09d03 PT	62
	63	srpc_free_bulk(bulk);
	64	tsu->tsu_private = NULL;
	65	}
	66	}
	67
	68	int
5f849bb0	69	brw_client_init(sfw_test_instance_t *tsi)
d7e09d03 PT	70	{
	71	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	72	int flags;
	73	int npg;
	74	int len;
	75	int opc;
	76	srpc_bulk_t *bulk;
	77	sfw_test_unit_t *tsu;
	78
	79	LASSERT(sn != NULL);
	80	LASSERT(tsi->tsi_is_client);
	81
	82	if ((sn->sn_features & LST_FEAT_BULK_LEN) == 0) {
	83	test_bulk_req_t *breq = &tsi->tsi_u.bulk_v0;
	84
	85	opc = breq->blk_opc;
	86	flags = breq->blk_flags;
	87	npg = breq->blk_npg;
	88	/* NB: this is not going to work for variable page size,
	89	* but we have to keep it for compatibility */
	90	len = npg * PAGE_CACHE_SIZE;
	91
	92	} else {
	93	test_bulk_req_v1_t *breq = &tsi->tsi_u.bulk_v1;
	94
	95	/* I should never get this step if it's unknown feature
	96	* because make_session will reject unknown feature */
	97	LASSERT((sn->sn_features & ~LST_FEATS_MASK) == 0);
	98
	99	opc = breq->blk_opc;
	100	flags = breq->blk_flags;
	101	len = breq->blk_len;
	102	npg = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	103	}
	104
	105	if (npg > LNET_MAX_IOV \|\| npg <= 0)
	106	return -EINVAL;
	107
	108	if (opc != LST_BRW_READ && opc != LST_BRW_WRITE)
	109	return -EINVAL;
	110
	111	if (flags != LST_BRW_CHECK_NONE &&
	112	flags != LST_BRW_CHECK_FULL && flags != LST_BRW_CHECK_SIMPLE)
	113	return -EINVAL;
	114
	115	list_for_each_entry(tsu, &tsi->tsi_units, tsu_list) {
	116	bulk = srpc_alloc_bulk(lnet_cpt_of_nid(tsu->tsu_dest.nid),
	117	npg, len, opc == LST_BRW_READ);
	118	if (bulk == NULL) {
	119	brw_client_fini(tsi);
	120	return -ENOMEM;
	121	}
	122
	123	tsu->tsu_private = bulk;
	124	}
	125
	126	return 0;
	127	}
	128
	129	#define BRW_POISON 0xbeefbeefbeefbeefULL
	130	#define BRW_MAGIC 0xeeb0eeb1eeb2eeb3ULL
	131	#define BRW_MSIZE sizeof(__u64)
	132
	133	int
5f849bb0	134	brw_inject_one_error(void)
d7e09d03 PT	135	{
	136	struct timeval tv;
	137
5252bbfd LN	138	if (brw_inject_errors <= 0)
5252bbfd LN	139	return 0;
d7e09d03 PT	140
	141	do_gettimeofday(&tv);
	142
5252bbfd LN	143	if ((tv.tv_usec & 1) == 0)
5252bbfd LN	144	return 0;
d7e09d03 PT	145
	146	return brw_inject_errors--;
	147	}
	148
	149	void
5f849bb0	150	brw_fill_page(struct page *pg, int pattern, __u64 magic)
d7e09d03 PT	151	{
	152	char *addr = page_address(pg);
	153	int i;
	154
5f849bb0	155	LASSERT(addr != NULL);
d7e09d03	156
5252bbfd LN	157	if (pattern == LST_BRW_CHECK_NONE)
5252bbfd LN	158	return;
d7e09d03 PT	159
	160	if (magic == BRW_MAGIC)
	161	magic += brw_inject_one_error();
	162
	163	if (pattern == LST_BRW_CHECK_SIMPLE) {
	164	memcpy(addr, &magic, BRW_MSIZE);
	165	addr += PAGE_CACHE_SIZE - BRW_MSIZE;
	166	memcpy(addr, &magic, BRW_MSIZE);
	167	return;
	168	}
	169
	170	if (pattern == LST_BRW_CHECK_FULL) {
	171	for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++)
	172	memcpy(addr + i * BRW_MSIZE, &magic, BRW_MSIZE);
	173	return;
	174	}
	175
5f849bb0	176	LBUG();
d7e09d03 PT	177	return;
	178	}
	179
	180	int
5f849bb0	181	brw_check_page(struct page *pg, int pattern, __u64 magic)
d7e09d03 PT	182	{
	183	char *addr = page_address(pg);
	184	__u64 data = 0; /* make compiler happy */
	185	int i;
	186
5f849bb0	187	LASSERT(addr != NULL);
d7e09d03 PT	188
	189	if (pattern == LST_BRW_CHECK_NONE)
	190	return 0;
	191
	192	if (pattern == LST_BRW_CHECK_SIMPLE) {
	193	data = ((__u64 ) addr);
5252bbfd LN	194	if (data != magic)
5252bbfd LN	195	goto bad_data;
d7e09d03 PT	196
	197	addr += PAGE_CACHE_SIZE - BRW_MSIZE;
	198	data = ((__u64 ) addr);
5252bbfd LN	199	if (data != magic)
5252bbfd LN	200	goto bad_data;
d7e09d03 PT	201
	202	return 0;
	203	}
	204
	205	if (pattern == LST_BRW_CHECK_FULL) {
	206	for (i = 0; i < PAGE_CACHE_SIZE / BRW_MSIZE; i++) {
	207	data = (((__u64 ) addr) + i);
5252bbfd LN	208	if (data != magic)
5252bbfd LN	209	goto bad_data;
d7e09d03 PT	210	}
	211
	212	return 0;
	213	}
	214
5f849bb0	215	LBUG();
d7e09d03 PT	216
d7e09d03 PT	217	bad_data:
5f849bb0	218	CERROR("Bad data in page %p: "LPX64", "LPX64" expected\n",
d7e09d03 PT	219	pg, data, magic);
	220	return 1;
	221	}
	222
	223	void
5f849bb0	224	brw_fill_bulk(srpc_bulk_t *bk, int pattern, __u64 magic)
d7e09d03 PT	225	{
	226	int i;
	227	struct page *pg;
	228
	229	for (i = 0; i < bk->bk_niov; i++) {
	230	pg = bk->bk_iovs[i].kiov_page;
	231	brw_fill_page(pg, pattern, magic);
	232	}
	233	}
	234
	235	int
5f849bb0	236	brw_check_bulk(srpc_bulk_t *bk, int pattern, __u64 magic)
d7e09d03 PT	237	{
	238	int i;
	239	struct page *pg;
	240
	241	for (i = 0; i < bk->bk_niov; i++) {
	242	pg = bk->bk_iovs[i].kiov_page;
	243	if (brw_check_page(pg, pattern, magic) != 0) {
5f849bb0	244	CERROR("Bulk page %p (%d/%d) is corrupted!\n",
d7e09d03 PT	245	pg, i, bk->bk_niov);
	246	return 1;
	247	}
	248	}
	249
	250	return 0;
	251	}
	252
	253	static int
5f849bb0	254	brw_client_prep_rpc(sfw_test_unit_t *tsu,
d7e09d03 PT	255	lnet_process_id_t dest, srpc_client_rpc_t **rpcpp)
	256	{
	257	srpc_bulk_t *bulk = tsu->tsu_private;
	258	sfw_test_instance_t *tsi = tsu->tsu_instance;
	259	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	260	srpc_client_rpc_t *rpc;
	261	srpc_brw_reqst_t *req;
	262	int flags;
	263	int npg;
	264	int len;
	265	int opc;
	266	int rc;
	267
	268	LASSERT(sn != NULL);
	269	LASSERT(bulk != NULL);
	270
	271	if ((sn->sn_features & LST_FEAT_BULK_LEN) == 0) {
	272	test_bulk_req_t *breq = &tsi->tsi_u.bulk_v0;
	273
	274	opc = breq->blk_opc;
	275	flags = breq->blk_flags;
	276	npg = breq->blk_npg;
	277	len = npg * PAGE_CACHE_SIZE;
	278
	279	} else {
	280	test_bulk_req_v1_t *breq = &tsi->tsi_u.bulk_v1;
	281
	282	/* I should never get this step if it's unknown feature
	283	* because make_session will reject unknown feature */
	284	LASSERT((sn->sn_features & ~LST_FEATS_MASK) == 0);
	285
	286	opc = breq->blk_opc;
	287	flags = breq->blk_flags;
	288	len = breq->blk_len;
	289	npg = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	290	}
	291
	292	rc = sfw_create_test_rpc(tsu, dest, sn->sn_features, npg, len, &rpc);
	293	if (rc != 0)
	294	return rc;
	295
	296	memcpy(&rpc->crpc_bulk, bulk, offsetof(srpc_bulk_t, bk_iovs[npg]));
	297	if (opc == LST_BRW_WRITE)
	298	brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_MAGIC);
	299	else
	300	brw_fill_bulk(&rpc->crpc_bulk, flags, BRW_POISON);
	301
	302	req = &rpc->crpc_reqstmsg.msg_body.brw_reqst;
	303	req->brw_flags = flags;
	304	req->brw_rw = opc;
	305	req->brw_len = len;
	306
	307	*rpcpp = rpc;
	308	return 0;
	309	}
	310
	311	static void
5f849bb0	312	brw_client_done_rpc(sfw_test_unit_t tsu, srpc_client_rpc_t rpc)
d7e09d03 PT	313	{
	314	__u64 magic = BRW_MAGIC;
	315	sfw_test_instance_t *tsi = tsu->tsu_instance;
	316	sfw_session_t *sn = tsi->tsi_batch->bat_session;
	317	srpc_msg_t *msg = &rpc->crpc_replymsg;
	318	srpc_brw_reply_t *reply = &msg->msg_body.brw_reply;
	319	srpc_brw_reqst_t *reqst = &rpc->crpc_reqstmsg.msg_body.brw_reqst;
	320
5f849bb0	321	LASSERT(sn != NULL);
d7e09d03 PT	322
d7e09d03 PT	323	if (rpc->crpc_status != 0) {
5f849bb0	324	CERROR("BRW RPC to %s failed with %d\n",
d7e09d03 PT	325	libcfs_id2str(rpc->crpc_dest), rpc->crpc_status);
	326	if (!tsi->tsi_stopping) /* rpc could have been aborted */
	327	atomic_inc(&sn->sn_brw_errors);
	328	goto out;
	329	}
	330
	331	if (msg->msg_magic != SRPC_MSG_MAGIC) {
	332	__swab64s(&magic);
	333	__swab32s(&reply->brw_status);
	334	}
	335
5f849bb0	336	CDEBUG(reply->brw_status ? D_WARNING : D_NET,
d7e09d03 PT	337	"BRW RPC to %s finished with brw_status: %d\n",
	338	libcfs_id2str(rpc->crpc_dest), reply->brw_status);
	339
	340	if (reply->brw_status != 0) {
	341	atomic_inc(&sn->sn_brw_errors);
	342	rpc->crpc_status = -(int)reply->brw_status;
	343	goto out;
	344	}
	345
5252bbfd LN	346	if (reqst->brw_rw == LST_BRW_WRITE)
5252bbfd LN	347	goto out;
d7e09d03 PT	348
d7e09d03 PT	349	if (brw_check_bulk(&rpc->crpc_bulk, reqst->brw_flags, magic) != 0) {
5f849bb0	350	CERROR("Bulk data from %s is corrupted!\n",
d7e09d03 PT	351	libcfs_id2str(rpc->crpc_dest));
	352	atomic_inc(&sn->sn_brw_errors);
	353	rpc->crpc_status = -EBADMSG;
	354	}
	355
	356	out:
	357	return;
	358	}
	359
	360	void
5f849bb0	361	brw_server_rpc_done(srpc_server_rpc_t *rpc)
d7e09d03 PT	362	{
	363	srpc_bulk_t *blk = rpc->srpc_bulk;
	364
5252bbfd LN	365	if (blk == NULL)
5252bbfd LN	366	return;
d7e09d03 PT	367
d7e09d03 PT	368	if (rpc->srpc_status != 0)
5f849bb0	369	CERROR("Bulk transfer %s %s has failed: %d\n",
d7e09d03 PT	370	blk->bk_sink ? "from" : "to",
	371	libcfs_id2str(rpc->srpc_peer), rpc->srpc_status);
	372	else
5f849bb0	373	CDEBUG(D_NET, "Transferred %d pages bulk data %s %s\n",
d7e09d03 PT	374	blk->bk_niov, blk->bk_sink ? "from" : "to",
	375	libcfs_id2str(rpc->srpc_peer));
	376
	377	sfw_free_pages(rpc);
	378	}
	379
	380	int
5f849bb0	381	brw_bulk_ready(srpc_server_rpc_t *rpc, int status)
d7e09d03 PT	382	{
	383	__u64 magic = BRW_MAGIC;
	384	srpc_brw_reply_t *reply = &rpc->srpc_replymsg.msg_body.brw_reply;
	385	srpc_brw_reqst_t *reqst;
	386	srpc_msg_t *reqstmsg;
	387
5f849bb0 LN	388	LASSERT(rpc->srpc_bulk != NULL);
5f849bb0 LN	389	LASSERT(rpc->srpc_reqstbuf != NULL);
d7e09d03 PT	390
	391	reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
	392	reqst = &reqstmsg->msg_body.brw_reqst;
	393
	394	if (status != 0) {
5f849bb0	395	CERROR("BRW bulk %s failed for RPC from %s: %d\n",
d7e09d03 PT	396	reqst->brw_rw == LST_BRW_READ ? "READ" : "WRITE",
	397	libcfs_id2str(rpc->srpc_peer), status);
	398	return -EIO;
	399	}
	400
	401	if (reqst->brw_rw == LST_BRW_READ)
	402	return 0;
	403
	404	if (reqstmsg->msg_magic != SRPC_MSG_MAGIC)
	405	__swab64s(&magic);
	406
	407	if (brw_check_bulk(rpc->srpc_bulk, reqst->brw_flags, magic) != 0) {
5f849bb0	408	CERROR("Bulk data from %s is corrupted!\n",
d7e09d03 PT	409	libcfs_id2str(rpc->srpc_peer));
	410	reply->brw_status = EBADMSG;
	411	}
	412
	413	return 0;
	414	}
	415
	416	int
	417	brw_server_handle(struct srpc_server_rpc *rpc)
	418	{
	419	struct srpc_service *sv = rpc->srpc_scd->scd_svc;
	420	srpc_msg_t *replymsg = &rpc->srpc_replymsg;
	421	srpc_msg_t *reqstmsg = &rpc->srpc_reqstbuf->buf_msg;
	422	srpc_brw_reply_t *reply = &replymsg->msg_body.brw_reply;
	423	srpc_brw_reqst_t *reqst = &reqstmsg->msg_body.brw_reqst;
	424	int npg;
	425	int rc;
	426
5f849bb0	427	LASSERT(sv->sv_id == SRPC_SERVICE_BRW);
d7e09d03 PT	428
d7e09d03 PT	429	if (reqstmsg->msg_magic != SRPC_MSG_MAGIC) {
5f849bb0	430	LASSERT(reqstmsg->msg_magic == __swab32(SRPC_MSG_MAGIC));
d7e09d03 PT	431
	432	__swab32s(&reqst->brw_rw);
	433	__swab32s(&reqst->brw_len);
	434	__swab32s(&reqst->brw_flags);
	435	__swab64s(&reqst->brw_rpyid);
	436	__swab64s(&reqst->brw_bulkid);
	437	}
5f849bb0	438	LASSERT(reqstmsg->msg_type == (__u32)srpc_service2request(sv->sv_id));
d7e09d03 PT	439
	440	reply->brw_status = 0;
	441	rpc->srpc_done = brw_server_rpc_done;
	442
	443	if ((reqst->brw_rw != LST_BRW_READ && reqst->brw_rw != LST_BRW_WRITE) \|\|
	444	(reqst->brw_flags != LST_BRW_CHECK_NONE &&
	445	reqst->brw_flags != LST_BRW_CHECK_FULL &&
	446	reqst->brw_flags != LST_BRW_CHECK_SIMPLE)) {
	447	reply->brw_status = EINVAL;
	448	return 0;
	449	}
	450
	451	if ((reqstmsg->msg_ses_feats & ~LST_FEATS_MASK) != 0) {
	452	replymsg->msg_ses_feats = LST_FEATS_MASK;
	453	reply->brw_status = EPROTO;
	454	return 0;
	455	}
	456
	457	if ((reqstmsg->msg_ses_feats & LST_FEAT_BULK_LEN) == 0) {
	458	/* compat with old version */
	459	if ((reqst->brw_len & ~CFS_PAGE_MASK) != 0) {
	460	reply->brw_status = EINVAL;
	461	return 0;
	462	}
	463	npg = reqst->brw_len >> PAGE_CACHE_SHIFT;
	464
	465	} else {
	466	npg = (reqst->brw_len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
	467	}
	468
	469	replymsg->msg_ses_feats = reqstmsg->msg_ses_feats;
	470
	471	if (reqst->brw_len == 0 \|\| npg > LNET_MAX_IOV) {
	472	reply->brw_status = EINVAL;
	473	return 0;
	474	}
	475
	476	rc = sfw_alloc_pages(rpc, rpc->srpc_scd->scd_cpt, npg,
	477	reqst->brw_len,
	478	reqst->brw_rw == LST_BRW_WRITE);
	479	if (rc != 0)
	480	return rc;
	481
	482	if (reqst->brw_rw == LST_BRW_READ)
	483	brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_MAGIC);
	484	else
	485	brw_fill_bulk(rpc->srpc_bulk, reqst->brw_flags, BRW_POISON);
	486
	487	return 0;
	488	}
	489
	490	sfw_test_client_ops_t brw_test_client;
	491	void brw_init_test_client(void)
	492	{
	493	brw_test_client.tso_init = brw_client_init;
	494	brw_test_client.tso_fini = brw_client_fini;
	495	brw_test_client.tso_prep_rpc = brw_client_prep_rpc;
	496	brw_test_client.tso_done_rpc = brw_client_done_rpc;
	497	};
	498
	499	srpc_service_t brw_test_service;
	500	void brw_init_test_service(void)
	501	{
	502
503	brw_test_service.sv_id = SRPC_SERVICE_BRW;
504	brw_test_service.sv_name = "brw_test";
505	brw_test_service.sv_handler = brw_server_handle;
506	brw_test_service.sv_bulk_ready = brw_bulk_ready;
507	brw_test_service.sv_wi_total = brw_srv_workitems;
508	}