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/*
* 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 <linux/unaligned/access_ok.h>
#include "../include/obd_support.h"
#include "../include/lustre_debug.h"
#include "../include/lustre_net.h"
void dump_lniobuf(struct niobuf_local *nb)
{
CDEBUG(D_RPCTRACE,
"niobuf_local: file_offset=%lld, 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);
#define LPDS sizeof(__u64)
int block_debug_setup(void *addr, int len, __u64 off, __u64 id)
{
LASSERT(addr);
put_unaligned_le64(off, addr);
put_unaligned_le64(id, addr+LPDS);
addr += len - LPDS - LPDS;
put_unaligned_le64(off, addr);
put_unaligned_le64(id, addr+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 %#llx offset %llu off: %#llx != %#llx\n",
who, id, off, *(__u64 *)addr, ne_off);
err = -EINVAL;
}
if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
CDEBUG(D_ERROR, "%s: id %#llx offset %llu id: %#llx != %#llx\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 %#llx offset %llu end off: %#llx != %#llx\n",
who, id, off, *(__u64 *)addr, ne_off);
err = -EINVAL;
}
if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
CDEBUG(D_ERROR, "%s: id %#llx offset %llu end id: %#llx != %#llx\n",
who, id, off, *(__u64 *)(addr + LPDS), id);
err = -EINVAL;
}
return err;
}
EXPORT_SYMBOL(block_debug_check);
#undef LPDS
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