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- /*
- * This file is part of UBIFS.
- *
- * Copyright (C) 2006-2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 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 for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Authors: Artem Bityutskiy (Битюцкий Артём)
- * Adrian Hunter
- */
- /*
- * This file implements most of the debugging stuff which is compiled in only
- * when it is enabled. But some debugging check functions are implemented in
- * corresponding subsystem, just because they are closely related and utilize
- * various local functions of those subsystems.
- */
- #define UBIFS_DBG_PRESERVE_UBI
- #include "ubifs.h"
- #ifdef CONFIG_UBIFS_FS_DEBUG
- DEFINE_SPINLOCK(dbg_lock);
- static char dbg_key_buf0[128];
- static char dbg_key_buf1[128];
- unsigned int ubifs_msg_flags = UBIFS_MSG_FLAGS_DEFAULT;
- unsigned int ubifs_chk_flags = UBIFS_CHK_FLAGS_DEFAULT;
- unsigned int ubifs_tst_flags;
- module_param_named(debug_msgs, ubifs_msg_flags, uint, S_IRUGO | S_IWUSR);
- module_param_named(debug_chks, ubifs_chk_flags, uint, S_IRUGO | S_IWUSR);
- module_param_named(debug_tsts, ubifs_tst_flags, uint, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(debug_msgs, "Debug message type flags");
- MODULE_PARM_DESC(debug_chks, "Debug check flags");
- MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
- static const char *get_key_type(int type)
- {
- switch (type) {
- case UBIFS_INO_KEY:
- return "inode";
- case UBIFS_DENT_KEY:
- return "direntry";
- case UBIFS_XENT_KEY:
- return "xentry";
- case UBIFS_DATA_KEY:
- return "data";
- case UBIFS_TRUN_KEY:
- return "truncate";
- default:
- return "unknown/invalid key";
- }
- }
- static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key,
- char *buffer)
- {
- char *p = buffer;
- int type = key_type(c, key);
- if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) {
- switch (type) {
- case UBIFS_INO_KEY:
- sprintf(p, "(%lu, %s)", (unsigned long)key_inum(c, key),
- get_key_type(type));
- break;
- case UBIFS_DENT_KEY:
- case UBIFS_XENT_KEY:
- sprintf(p, "(%lu, %s, %#08x)",
- (unsigned long)key_inum(c, key),
- get_key_type(type), key_hash(c, key));
- break;
- case UBIFS_DATA_KEY:
- sprintf(p, "(%lu, %s, %u)",
- (unsigned long)key_inum(c, key),
- get_key_type(type), key_block(c, key));
- break;
- case UBIFS_TRUN_KEY:
- sprintf(p, "(%lu, %s)",
- (unsigned long)key_inum(c, key),
- get_key_type(type));
- break;
- default:
- sprintf(p, "(bad key type: %#08x, %#08x)",
- key->u32[0], key->u32[1]);
- }
- } else
- sprintf(p, "bad key format %d", c->key_fmt);
- }
- const char *dbg_key_str0(const struct ubifs_info *c, const union ubifs_key *key)
- {
- /* dbg_lock must be held */
- sprintf_key(c, key, dbg_key_buf0);
- return dbg_key_buf0;
- }
- const char *dbg_key_str1(const struct ubifs_info *c, const union ubifs_key *key)
- {
- /* dbg_lock must be held */
- sprintf_key(c, key, dbg_key_buf1);
- return dbg_key_buf1;
- }
- /**
- * ubifs_debugging_init - initialize UBIFS debugging.
- * @c: UBIFS file-system description object
- *
- * This function initializes debugging-related data for the file system.
- * Returns zero in case of success and a negative error code in case of
- * failure.
- */
- int ubifs_debugging_init(struct ubifs_info *c)
- {
- c->dbg = kzalloc(sizeof(struct ubifs_debug_info), GFP_KERNEL);
- if (!c->dbg)
- return -ENOMEM;
- c->dbg->buf = vmalloc(c->leb_size);
- if (!c->dbg->buf)
- goto out;
- return 0;
- out:
- kfree(c->dbg);
- return -ENOMEM;
- }
- /**
- * ubifs_debugging_exit - free debugging data.
- * @c: UBIFS file-system description object
- */
- void ubifs_debugging_exit(struct ubifs_info *c)
- {
- vfree(c->dbg->buf);
- kfree(c->dbg);
- }
- #endif /* CONFIG_UBIFS_FS_DEBUG */
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