diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/debug.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/debug.c | 124 |
1 files changed, 124 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 000000000000..15f71bbb7276 --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/debug.c @@ -0,0 +1,124 @@ +/* + * 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 |