drivers/staging/lustre/lustre/obdclass/debug.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) 2002, 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.
 *
 * lustre/obdclass/debug.c
 *
 * Helper routines for dumping data structs for debugging.
 */

#define DEBUG_SUBSYSTEM D_OTHER


#include <obd_ost.h>
#include <obd_support.h>
#include <lustre_debug.h>
#include <lustre_net.h>

void dump_lniobuf(struct niobuf_local *nb)
{
	CDEBUG(D_RPCTRACE,
	       "niobuf_local: file_offset="LPD64", len=%d, page=%p, rc=%d\n",
	       nb->lnb_file_offset, nb->len, nb->page, nb->rc);
	CDEBUG(D_RPCTRACE, "nb->page: index = %ld\n",
			nb->page ? page_index(nb->page) : -1);
}
EXPORT_SYMBOL(dump_lniobuf);

void dump_lsm(int level, struct lov_stripe_md *lsm)
{
	CDEBUG(level, "lsm %p, objid "DOSTID", maxbytes "LPX64", magic 0x%08X,"
	       " stripe_size %u, stripe_count %u, refc: %d,"
	       " layout_gen %u, pool ["LOV_POOLNAMEF"]\n", lsm,
	       POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
	       lsm->lsm_stripe_size, lsm->lsm_stripe_count,
	       atomic_read(&lsm->lsm_refc), lsm->lsm_layout_gen,
	       lsm->lsm_pool_name);
}
EXPORT_SYMBOL(dump_lsm);

#define LPDS sizeof(__u64)
int block_debug_setup(void *addr, int len, __u64 off, __u64 id)
{
	LASSERT(addr);

	off = cpu_to_le64 (off);
	id = cpu_to_le64 (id);
	memcpy(addr, (char *)&off, LPDS);
	memcpy(addr + LPDS, (char *)&id, LPDS);

	addr += len - LPDS - LPDS;
	memcpy(addr, (char *)&off, LPDS);
	memcpy(addr + LPDS, (char *)&id, LPDS);

	return 0;
}
EXPORT_SYMBOL(block_debug_setup);

int block_debug_check(char *who, void *addr, int end, __u64 off, __u64 id)
{
	__u64 ne_off;
	int err = 0;

	LASSERT(addr);

	ne_off = le64_to_cpu (off);
	id = le64_to_cpu (id);
	if (memcmp(addr, (char *)&ne_off, LPDS)) {
		CDEBUG(D_ERROR, "%s: id "LPX64" offset "LPU64" off: "LPX64" != "
		       LPX64"\n", who, id, off, *(__u64 *)addr, ne_off);
		err = -EINVAL;
	}
	if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
		CDEBUG(D_ERROR, "%s: id "LPX64" offset "LPU64" id: "LPX64" != "LPX64"\n",
		       who, id, off, *(__u64 *)(addr + LPDS), id);
		err = -EINVAL;
	}

	addr += end - LPDS - LPDS;
	if (memcmp(addr, (char *)&ne_off, LPDS)) {
		CDEBUG(D_ERROR, "%s: id "LPX64" offset "LPU64" end off: "LPX64" != "
		       LPX64"\n", who, id, off, *(__u64 *)addr, ne_off);
		err = -EINVAL;
	}
	if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
		CDEBUG(D_ERROR, "%s: id "LPX64" offset "LPU64" end id: "LPX64" != "
		       LPX64"\n", who, id, off, *(__u64 *)(addr + LPDS), id);
		err = -EINVAL;
	}

	return err;
}
EXPORT_SYMBOL(block_debug_check);
#undef LPDS