diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/staging/lustre/lustre/obdclass/debug.c |
Initial import
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/debug.c')
-rw-r--r-- | drivers/staging/lustre/lustre/obdclass/debug.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/debug.c b/drivers/staging/lustre/lustre/obdclass/debug.c new file mode 100644 index 000000000..9c934e6d2 --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/debug.c @@ -0,0 +1,109 @@ +/* + * 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 |