477 lines
18 KiB
C
477 lines
18 KiB
C
/*
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* This file is part of UBIFS.
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*
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* Copyright (C) 2006-2008 Nokia Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Authors: Artem Bityutskiy (Битюцкий Артём)
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* Adrian Hunter
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*/
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#ifndef __UBIFS_DEBUG_H__
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#define __UBIFS_DEBUG_H__
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#ifdef CONFIG_UBIFS_FS_DEBUG
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/**
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* ubifs_debug_info - per-FS debugging information.
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* @buf: a buffer of LEB size, used for various purposes
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* @old_zroot: old index root - used by 'dbg_check_old_index()'
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* @old_zroot_level: old index root level - used by 'dbg_check_old_index()'
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* @old_zroot_sqnum: old index root sqnum - used by 'dbg_check_old_index()'
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* @failure_mode: failure mode for recovery testing
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* @fail_delay: 0=>don't delay, 1=>delay a time, 2=>delay a number of calls
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* @fail_timeout: time in jiffies when delay of failure mode expires
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* @fail_cnt: current number of calls to failure mode I/O functions
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* @fail_cnt_max: number of calls by which to delay failure mode
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* @chk_lpt_sz: used by LPT tree size checker
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* @chk_lpt_sz2: used by LPT tree size checker
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* @chk_lpt_wastage: used by LPT tree size checker
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* @chk_lpt_lebs: used by LPT tree size checker
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* @new_nhead_offs: used by LPT tree size checker
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* @new_ihead_lnum: used by debugging to check @c->ihead_lnum
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* @new_ihead_offs: used by debugging to check @c->ihead_offs
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*
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* @saved_lst: saved lprops statistics (used by 'dbg_save_space_info()')
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* @saved_free: saved free space (used by 'dbg_save_space_info()')
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*
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* dfs_dir_name: name of debugfs directory containing this file-system's files
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* dfs_dir: direntry object of the file-system debugfs directory
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* dfs_dump_lprops: "dump lprops" debugfs knob
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* dfs_dump_budg: "dump budgeting information" debugfs knob
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* dfs_dump_tnc: "dump TNC" debugfs knob
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*/
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struct ubifs_debug_info {
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void *buf;
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struct ubifs_zbranch old_zroot;
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int old_zroot_level;
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unsigned long long old_zroot_sqnum;
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int failure_mode;
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int fail_delay;
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unsigned long fail_timeout;
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unsigned int fail_cnt;
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unsigned int fail_cnt_max;
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long long chk_lpt_sz;
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long long chk_lpt_sz2;
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long long chk_lpt_wastage;
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int chk_lpt_lebs;
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int new_nhead_offs;
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int new_ihead_lnum;
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int new_ihead_offs;
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struct ubifs_lp_stats saved_lst;
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long long saved_free;
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char dfs_dir_name[100];
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struct dentry *dfs_dir;
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struct dentry *dfs_dump_lprops;
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struct dentry *dfs_dump_budg;
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struct dentry *dfs_dump_tnc;
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};
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#define ubifs_assert(expr) do { \
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if (unlikely(!(expr))) { \
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printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
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__func__, __LINE__, current->pid); \
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dbg_dump_stack(); \
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} \
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} while (0)
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#define ubifs_assert_cmt_locked(c) do { \
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if (unlikely(down_write_trylock(&(c)->commit_sem))) { \
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up_write(&(c)->commit_sem); \
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printk(KERN_CRIT "commit lock is not locked!\n"); \
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ubifs_assert(0); \
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} \
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} while (0)
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#define dbg_dump_stack() do { \
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if (!dbg_failure_mode) \
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dump_stack(); \
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} while (0)
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/* Generic debugging messages */
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#define dbg_msg(fmt, ...) do { \
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spin_lock(&dbg_lock); \
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printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid, \
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__func__, ##__VA_ARGS__); \
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spin_unlock(&dbg_lock); \
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} while (0)
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#define dbg_do_msg(typ, fmt, ...) do { \
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if (ubifs_msg_flags & typ) \
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dbg_msg(fmt, ##__VA_ARGS__); \
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} while (0)
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#define dbg_err(fmt, ...) do { \
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spin_lock(&dbg_lock); \
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ubifs_err(fmt, ##__VA_ARGS__); \
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spin_unlock(&dbg_lock); \
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} while (0)
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const char *dbg_key_str0(const struct ubifs_info *c,
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const union ubifs_key *key);
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const char *dbg_key_str1(const struct ubifs_info *c,
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const union ubifs_key *key);
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/*
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* DBGKEY macros require @dbg_lock to be held, which it is in the dbg message
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* macros.
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*/
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#define DBGKEY(key) dbg_key_str0(c, (key))
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#define DBGKEY1(key) dbg_key_str1(c, (key))
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/* General messages */
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#define dbg_gen(fmt, ...) dbg_do_msg(UBIFS_MSG_GEN, fmt, ##__VA_ARGS__)
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/* Additional journal messages */
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#define dbg_jnl(fmt, ...) dbg_do_msg(UBIFS_MSG_JNL, fmt, ##__VA_ARGS__)
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/* Additional TNC messages */
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#define dbg_tnc(fmt, ...) dbg_do_msg(UBIFS_MSG_TNC, fmt, ##__VA_ARGS__)
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/* Additional lprops messages */
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#define dbg_lp(fmt, ...) dbg_do_msg(UBIFS_MSG_LP, fmt, ##__VA_ARGS__)
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/* Additional LEB find messages */
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#define dbg_find(fmt, ...) dbg_do_msg(UBIFS_MSG_FIND, fmt, ##__VA_ARGS__)
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/* Additional mount messages */
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#define dbg_mnt(fmt, ...) dbg_do_msg(UBIFS_MSG_MNT, fmt, ##__VA_ARGS__)
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/* Additional I/O messages */
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#define dbg_io(fmt, ...) dbg_do_msg(UBIFS_MSG_IO, fmt, ##__VA_ARGS__)
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/* Additional commit messages */
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#define dbg_cmt(fmt, ...) dbg_do_msg(UBIFS_MSG_CMT, fmt, ##__VA_ARGS__)
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/* Additional budgeting messages */
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#define dbg_budg(fmt, ...) dbg_do_msg(UBIFS_MSG_BUDG, fmt, ##__VA_ARGS__)
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/* Additional log messages */
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#define dbg_log(fmt, ...) dbg_do_msg(UBIFS_MSG_LOG, fmt, ##__VA_ARGS__)
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/* Additional gc messages */
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#define dbg_gc(fmt, ...) dbg_do_msg(UBIFS_MSG_GC, fmt, ##__VA_ARGS__)
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/* Additional scan messages */
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#define dbg_scan(fmt, ...) dbg_do_msg(UBIFS_MSG_SCAN, fmt, ##__VA_ARGS__)
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/* Additional recovery messages */
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#define dbg_rcvry(fmt, ...) dbg_do_msg(UBIFS_MSG_RCVRY, fmt, ##__VA_ARGS__)
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/*
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* Debugging message type flags (must match msg_type_names in debug.c).
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*
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* UBIFS_MSG_GEN: general messages
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* UBIFS_MSG_JNL: journal messages
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* UBIFS_MSG_MNT: mount messages
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* UBIFS_MSG_CMT: commit messages
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* UBIFS_MSG_FIND: LEB find messages
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* UBIFS_MSG_BUDG: budgeting messages
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* UBIFS_MSG_GC: garbage collection messages
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* UBIFS_MSG_TNC: TNC messages
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* UBIFS_MSG_LP: lprops messages
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* UBIFS_MSG_IO: I/O messages
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* UBIFS_MSG_LOG: log messages
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* UBIFS_MSG_SCAN: scan messages
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* UBIFS_MSG_RCVRY: recovery messages
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*/
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enum {
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UBIFS_MSG_GEN = 0x1,
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UBIFS_MSG_JNL = 0x2,
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UBIFS_MSG_MNT = 0x4,
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UBIFS_MSG_CMT = 0x8,
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UBIFS_MSG_FIND = 0x10,
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UBIFS_MSG_BUDG = 0x20,
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UBIFS_MSG_GC = 0x40,
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UBIFS_MSG_TNC = 0x80,
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UBIFS_MSG_LP = 0x100,
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UBIFS_MSG_IO = 0x200,
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UBIFS_MSG_LOG = 0x400,
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UBIFS_MSG_SCAN = 0x800,
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UBIFS_MSG_RCVRY = 0x1000,
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};
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/* Debugging message type flags for each default debug message level */
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#define UBIFS_MSG_LVL_0 0
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#define UBIFS_MSG_LVL_1 0x1
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#define UBIFS_MSG_LVL_2 0x7f
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#define UBIFS_MSG_LVL_3 0xffff
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/*
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* Debugging check flags (must match chk_names in debug.c).
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*
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* UBIFS_CHK_GEN: general checks
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* UBIFS_CHK_TNC: check TNC
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* UBIFS_CHK_IDX_SZ: check index size
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* UBIFS_CHK_ORPH: check orphans
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* UBIFS_CHK_OLD_IDX: check the old index
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* UBIFS_CHK_LPROPS: check lprops
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* UBIFS_CHK_FS: check the file-system
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*/
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enum {
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UBIFS_CHK_GEN = 0x1,
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UBIFS_CHK_TNC = 0x2,
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UBIFS_CHK_IDX_SZ = 0x4,
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UBIFS_CHK_ORPH = 0x8,
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UBIFS_CHK_OLD_IDX = 0x10,
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UBIFS_CHK_LPROPS = 0x20,
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UBIFS_CHK_FS = 0x40,
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};
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/*
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* Special testing flags (must match tst_names in debug.c).
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*
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* UBIFS_TST_FORCE_IN_THE_GAPS: force the use of in-the-gaps method
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* UBIFS_TST_RCVRY: failure mode for recovery testing
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*/
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enum {
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UBIFS_TST_FORCE_IN_THE_GAPS = 0x2,
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UBIFS_TST_RCVRY = 0x4,
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};
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#if CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 1
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#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_1
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#elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 2
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#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_2
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#elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 3
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#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_3
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#else
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#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_0
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#endif
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#ifdef CONFIG_UBIFS_FS_DEBUG_CHKS
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#define UBIFS_CHK_FLAGS_DEFAULT 0xffffffff
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#else
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#define UBIFS_CHK_FLAGS_DEFAULT 0
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#endif
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extern spinlock_t dbg_lock;
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extern unsigned int ubifs_msg_flags;
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extern unsigned int ubifs_chk_flags;
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extern unsigned int ubifs_tst_flags;
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int ubifs_debugging_init(struct ubifs_info *c);
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void ubifs_debugging_exit(struct ubifs_info *c);
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/* Dump functions */
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const char *dbg_ntype(int type);
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const char *dbg_cstate(int cmt_state);
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const char *dbg_get_key_dump(const struct ubifs_info *c,
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const union ubifs_key *key);
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void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode);
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void dbg_dump_node(const struct ubifs_info *c, const void *node);
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void dbg_dump_lpt_node(const struct ubifs_info *c, void *node, int lnum,
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int offs);
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void dbg_dump_budget_req(const struct ubifs_budget_req *req);
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void dbg_dump_lstats(const struct ubifs_lp_stats *lst);
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void dbg_dump_budg(struct ubifs_info *c);
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void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp);
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void dbg_dump_lprops(struct ubifs_info *c);
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void dbg_dump_lpt_info(struct ubifs_info *c);
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void dbg_dump_leb(const struct ubifs_info *c, int lnum);
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void dbg_dump_znode(const struct ubifs_info *c,
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const struct ubifs_znode *znode);
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void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat);
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void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
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struct ubifs_nnode *parent, int iip);
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void dbg_dump_tnc(struct ubifs_info *c);
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void dbg_dump_index(struct ubifs_info *c);
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void dbg_dump_lpt_lebs(const struct ubifs_info *c);
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/* Checking helper functions */
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typedef int (*dbg_leaf_callback)(struct ubifs_info *c,
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struct ubifs_zbranch *zbr, void *priv);
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typedef int (*dbg_znode_callback)(struct ubifs_info *c,
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struct ubifs_znode *znode, void *priv);
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int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
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dbg_znode_callback znode_cb, void *priv);
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/* Checking functions */
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void dbg_save_space_info(struct ubifs_info *c);
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int dbg_check_space_info(struct ubifs_info *c);
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int dbg_check_lprops(struct ubifs_info *c);
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int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot);
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int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot);
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int dbg_check_cats(struct ubifs_info *c);
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int dbg_check_ltab(struct ubifs_info *c);
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int dbg_chk_lpt_free_spc(struct ubifs_info *c);
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int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len);
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int dbg_check_synced_i_size(struct inode *inode);
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int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir);
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int dbg_check_tnc(struct ubifs_info *c, int extra);
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int dbg_check_idx_size(struct ubifs_info *c, long long idx_size);
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int dbg_check_filesystem(struct ubifs_info *c);
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void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat,
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int add_pos);
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int dbg_check_lprops(struct ubifs_info *c);
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int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode,
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int row, int col);
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int dbg_check_inode_size(struct ubifs_info *c, const struct inode *inode,
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loff_t size);
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/* Force the use of in-the-gaps method for testing */
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#define dbg_force_in_the_gaps_enabled \
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(ubifs_tst_flags & UBIFS_TST_FORCE_IN_THE_GAPS)
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int dbg_force_in_the_gaps(void);
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/* Failure mode for recovery testing */
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#define dbg_failure_mode (ubifs_tst_flags & UBIFS_TST_RCVRY)
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#ifndef UBIFS_DBG_PRESERVE_UBI
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#define ubi_leb_read dbg_leb_read
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#define ubi_leb_write dbg_leb_write
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#define ubi_leb_change dbg_leb_change
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#define ubi_leb_erase dbg_leb_erase
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#define ubi_leb_unmap dbg_leb_unmap
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#define ubi_is_mapped dbg_is_mapped
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#define ubi_leb_map dbg_leb_map
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#endif
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int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
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int len, int check);
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int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
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int offset, int len, int dtype);
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int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
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int len, int dtype);
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int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum);
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int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum);
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int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum);
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int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);
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static inline int dbg_read(struct ubi_volume_desc *desc, int lnum, char *buf,
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int offset, int len)
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{
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return dbg_leb_read(desc, lnum, buf, offset, len, 0);
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}
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static inline int dbg_write(struct ubi_volume_desc *desc, int lnum,
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const void *buf, int offset, int len)
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{
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return dbg_leb_write(desc, lnum, buf, offset, len, UBI_UNKNOWN);
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}
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static inline int dbg_change(struct ubi_volume_desc *desc, int lnum,
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const void *buf, int len)
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{
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return dbg_leb_change(desc, lnum, buf, len, UBI_UNKNOWN);
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}
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/* Debugfs-related stuff */
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int dbg_debugfs_init(void);
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void dbg_debugfs_exit(void);
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int dbg_debugfs_init_fs(struct ubifs_info *c);
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void dbg_debugfs_exit_fs(struct ubifs_info *c);
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#else /* !CONFIG_UBIFS_FS_DEBUG */
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/* Use "if (0)" to make compiler check arguments even if debugging is off */
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#define ubifs_assert(expr) do { \
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if (0 && (expr)) \
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printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
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__func__, __LINE__, current->pid); \
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} while (0)
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#define dbg_err(fmt, ...) do { \
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if (0) \
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ubifs_err(fmt, ##__VA_ARGS__); \
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} while (0)
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#define dbg_msg(fmt, ...) do { \
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if (0) \
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printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", \
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current->pid, __func__, ##__VA_ARGS__); \
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} while (0)
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#define dbg_dump_stack()
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#define ubifs_assert_cmt_locked(c)
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#define dbg_gen(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_jnl(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_tnc(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_lp(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_find(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_mnt(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_io(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_cmt(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_budg(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_log(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_gc(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_scan(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define dbg_rcvry(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
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#define DBGKEY(key) ((char *)(key))
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#define DBGKEY1(key) ((char *)(key))
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#define ubifs_debugging_init(c) 0
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#define ubifs_debugging_exit(c) ({})
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#define dbg_ntype(type) ""
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#define dbg_cstate(cmt_state) ""
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#define dbg_get_key_dump(c, key) ({})
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#define dbg_dump_inode(c, inode) ({})
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#define dbg_dump_node(c, node) ({})
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#define dbg_dump_lpt_node(c, node, lnum, offs) ({})
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#define dbg_dump_budget_req(req) ({})
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#define dbg_dump_lstats(lst) ({})
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#define dbg_dump_budg(c) ({})
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#define dbg_dump_lprop(c, lp) ({})
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#define dbg_dump_lprops(c) ({})
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#define dbg_dump_lpt_info(c) ({})
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#define dbg_dump_leb(c, lnum) ({})
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#define dbg_dump_znode(c, znode) ({})
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#define dbg_dump_heap(c, heap, cat) ({})
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#define dbg_dump_pnode(c, pnode, parent, iip) ({})
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#define dbg_dump_tnc(c) ({})
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#define dbg_dump_index(c) ({})
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#define dbg_dump_lpt_lebs(c) ({})
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#define dbg_walk_index(c, leaf_cb, znode_cb, priv) 0
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#define dbg_old_index_check_init(c, zroot) 0
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#define dbg_save_space_info(c) ({})
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#define dbg_check_space_info(c) 0
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#define dbg_check_old_index(c, zroot) 0
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#define dbg_check_cats(c) 0
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#define dbg_check_ltab(c) 0
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#define dbg_chk_lpt_free_spc(c) 0
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#define dbg_chk_lpt_sz(c, action, len) 0
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#define dbg_check_synced_i_size(inode) 0
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#define dbg_check_dir_size(c, dir) 0
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#define dbg_check_tnc(c, x) 0
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#define dbg_check_idx_size(c, idx_size) 0
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#define dbg_check_filesystem(c) 0
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#define dbg_check_heap(c, heap, cat, add_pos) ({})
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#define dbg_check_lprops(c) 0
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#define dbg_check_lpt_nodes(c, cnode, row, col) 0
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#define dbg_check_inode_size(c, inode, size) 0
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#define dbg_force_in_the_gaps_enabled 0
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#define dbg_force_in_the_gaps() 0
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#define dbg_failure_mode 0
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#define dbg_debugfs_init() 0
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#define dbg_debugfs_exit()
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#define dbg_debugfs_init_fs(c) 0
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#define dbg_debugfs_exit_fs(c) 0
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#endif /* !CONFIG_UBIFS_FS_DEBUG */
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#endif /* !__UBIFS_DEBUG_H__ */
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