| /* |
| * 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.gnu.org/licenses/gpl-2.0.html |
| * |
| * 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 <asm/unaligned.h> |
| |
| #include <obd_support.h> |
| #include <lustre_debug.h> |
| #include <lustre_net.h> |
| |
| #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 |