a904e3f1de
UBI (and UBIFS) are a bit over-engineered WRT debugging. The idea was to link as few as possible when debugging is disabled, but the downside is that most people produce bug reports which are difficult to understand. Always dump the VID and EC headers' contents in case of errors when it is helpful. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
232 lines
9.2 KiB
C
232 lines
9.2 KiB
C
/*
|
|
* Copyright (c) International Business Machines Corp., 2006
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Author: Artem Bityutskiy (Битюцкий Артём)
|
|
*/
|
|
|
|
#ifndef __UBI_DEBUG_H__
|
|
#define __UBI_DEBUG_H__
|
|
|
|
void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);
|
|
void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr);
|
|
void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);
|
|
|
|
#ifdef CONFIG_MTD_UBI_DEBUG
|
|
#include <linux/random.h>
|
|
|
|
#define ubi_assert(expr) do { \
|
|
if (unlikely(!(expr))) { \
|
|
printk(KERN_CRIT "UBI assert failed in %s at %u (pid %d)\n", \
|
|
__func__, __LINE__, current->pid); \
|
|
dump_stack(); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define dbg_err(fmt, ...) ubi_err(fmt, ##__VA_ARGS__)
|
|
|
|
#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a) \
|
|
print_hex_dump(l, ps, pt, r, g, b, len, a)
|
|
|
|
#define ubi_dbg_msg(type, fmt, ...) \
|
|
pr_debug("UBI DBG " type ": " fmt "\n", ##__VA_ARGS__)
|
|
|
|
/* Just a debugging messages not related to any specific UBI subsystem */
|
|
#define dbg_msg(fmt, ...) \
|
|
printk(KERN_DEBUG "UBI DBG (pid %d): %s: " fmt "\n", \
|
|
current->pid, __func__, ##__VA_ARGS__)
|
|
|
|
/* General debugging messages */
|
|
#define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__)
|
|
/* Messages from the eraseblock association sub-system */
|
|
#define dbg_eba(fmt, ...) ubi_dbg_msg("eba", fmt, ##__VA_ARGS__)
|
|
/* Messages from the wear-leveling sub-system */
|
|
#define dbg_wl(fmt, ...) ubi_dbg_msg("wl", fmt, ##__VA_ARGS__)
|
|
/* Messages from the input/output sub-system */
|
|
#define dbg_io(fmt, ...) ubi_dbg_msg("io", fmt, ##__VA_ARGS__)
|
|
/* Initialization and build messages */
|
|
#define dbg_bld(fmt, ...) ubi_dbg_msg("bld", fmt, ##__VA_ARGS__)
|
|
|
|
void ubi_dbg_dump_vol_info(const struct ubi_volume *vol);
|
|
void ubi_dbg_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx);
|
|
void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv);
|
|
void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type);
|
|
void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req);
|
|
int ubi_dbg_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len);
|
|
int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum,
|
|
int offset, int len);
|
|
int ubi_debugging_init_dev(struct ubi_device *ubi);
|
|
void ubi_debugging_exit_dev(struct ubi_device *ubi);
|
|
int ubi_debugfs_init(void);
|
|
void ubi_debugfs_exit(void);
|
|
int ubi_debugfs_init_dev(struct ubi_device *ubi);
|
|
void ubi_debugfs_exit_dev(struct ubi_device *ubi);
|
|
|
|
/*
|
|
* The UBI debugfs directory name pattern and maximum name length (3 for "ubi"
|
|
* + 2 for the number plus 1 for the trailing zero byte.
|
|
*/
|
|
#define UBI_DFS_DIR_NAME "ubi%d"
|
|
#define UBI_DFS_DIR_LEN (3 + 2 + 1)
|
|
|
|
/**
|
|
* struct ubi_debug_info - debugging information for an UBI device.
|
|
*
|
|
* @chk_gen: if UBI general extra checks are enabled
|
|
* @chk_io: if UBI I/O extra checks are enabled
|
|
* @disable_bgt: disable the background task for testing purposes
|
|
* @emulate_bitflips: emulate bit-flips for testing purposes
|
|
* @emulate_io_failures: emulate write/erase failures for testing purposes
|
|
* @dfs_dir_name: name of debugfs directory containing files of this UBI device
|
|
* @dfs_dir: direntry object of the UBI device debugfs directory
|
|
* @dfs_chk_gen: debugfs knob to enable UBI general extra checks
|
|
* @dfs_chk_io: debugfs knob to enable UBI I/O extra checks
|
|
* @dfs_disable_bgt: debugfs knob to disable the background task
|
|
* @dfs_emulate_bitflips: debugfs knob to emulate bit-flips
|
|
* @dfs_emulate_io_failures: debugfs knob to emulate write/erase failures
|
|
*/
|
|
struct ubi_debug_info {
|
|
unsigned int chk_gen:1;
|
|
unsigned int chk_io:1;
|
|
unsigned int disable_bgt:1;
|
|
unsigned int emulate_bitflips:1;
|
|
unsigned int emulate_io_failures:1;
|
|
char dfs_dir_name[UBI_DFS_DIR_LEN + 1];
|
|
struct dentry *dfs_dir;
|
|
struct dentry *dfs_chk_gen;
|
|
struct dentry *dfs_chk_io;
|
|
struct dentry *dfs_disable_bgt;
|
|
struct dentry *dfs_emulate_bitflips;
|
|
struct dentry *dfs_emulate_io_failures;
|
|
};
|
|
|
|
/**
|
|
* ubi_dbg_is_bgt_disabled - if the background thread is disabled.
|
|
* @ubi: UBI device description object
|
|
*
|
|
* Returns non-zero if the UBI background thread is disabled for testing
|
|
* purposes.
|
|
*/
|
|
static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
|
|
{
|
|
return ubi->dbg->disable_bgt;
|
|
}
|
|
|
|
/**
|
|
* ubi_dbg_is_bitflip - if it is time to emulate a bit-flip.
|
|
* @ubi: UBI device description object
|
|
*
|
|
* Returns non-zero if a bit-flip should be emulated, otherwise returns zero.
|
|
*/
|
|
static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
|
|
{
|
|
if (ubi->dbg->emulate_bitflips)
|
|
return !(random32() % 200);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ubi_dbg_is_write_failure - if it is time to emulate a write failure.
|
|
* @ubi: UBI device description object
|
|
*
|
|
* Returns non-zero if a write failure should be emulated, otherwise returns
|
|
* zero.
|
|
*/
|
|
static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
|
|
{
|
|
if (ubi->dbg->emulate_io_failures)
|
|
return !(random32() % 500);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ubi_dbg_is_erase_failure - if its time to emulate an erase failure.
|
|
* @ubi: UBI device description object
|
|
*
|
|
* Returns non-zero if an erase failure should be emulated, otherwise returns
|
|
* zero.
|
|
*/
|
|
static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
|
|
{
|
|
if (ubi->dbg->emulate_io_failures)
|
|
return !(random32() % 400);
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
/* Use "if (0)" to make compiler check arguments even if debugging is off */
|
|
#define ubi_assert(expr) do { \
|
|
if (0) { \
|
|
printk(KERN_CRIT "UBI assert failed in %s at %u (pid %d)\n", \
|
|
__func__, __LINE__, current->pid); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define dbg_err(fmt, ...) do { \
|
|
if (0) \
|
|
ubi_err(fmt, ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#define ubi_dbg_msg(fmt, ...) do { \
|
|
if (0) \
|
|
printk(KERN_DEBUG fmt "\n", ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#define dbg_msg(fmt, ...) ubi_dbg_msg(fmt, ##__VA_ARGS__)
|
|
#define dbg_gen(fmt, ...) ubi_dbg_msg(fmt, ##__VA_ARGS__)
|
|
#define dbg_eba(fmt, ...) ubi_dbg_msg(fmt, ##__VA_ARGS__)
|
|
#define dbg_wl(fmt, ...) ubi_dbg_msg(fmt, ##__VA_ARGS__)
|
|
#define dbg_io(fmt, ...) ubi_dbg_msg(fmt, ##__VA_ARGS__)
|
|
#define dbg_bld(fmt, ...) ubi_dbg_msg(fmt, ##__VA_ARGS__)
|
|
|
|
static inline void
|
|
ubi_dbg_dump_vol_info(const struct ubi_volume *vol) { return; }
|
|
static inline void
|
|
ubi_dbg_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx) { return; }
|
|
static inline void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv) { return; }
|
|
static inline void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb,
|
|
int type) { return; }
|
|
static inline void
|
|
ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req) { return; }
|
|
static inline void
|
|
ubi_dbg_print_hex_dump(const char *l, const char *ps, int pt, int r,
|
|
int g, const void *b, size_t len, bool a) { return; }
|
|
static inline int ubi_dbg_check_all_ff(struct ubi_device *ubi,
|
|
int pnum, int offset,
|
|
int len) { return 0; }
|
|
static inline int ubi_dbg_check_write(struct ubi_device *ubi,
|
|
const void *buf, int pnum,
|
|
int offset, int len) { return 0; }
|
|
|
|
static inline int ubi_debugging_init_dev(struct ubi_device *ubi) { return 0; }
|
|
static inline void ubi_debugging_exit_dev(struct ubi_device *ubi) { return; }
|
|
static inline int ubi_debugfs_init(void) { return 0; }
|
|
static inline void ubi_debugfs_exit(void) { return; }
|
|
static inline int ubi_debugfs_init_dev(struct ubi_device *ubi) { return 0; }
|
|
static inline void ubi_debugfs_exit_dev(struct ubi_device *ubi) { return; }
|
|
|
|
static inline int
|
|
ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi) { return 0; }
|
|
static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi) { return 0; }
|
|
static inline int
|
|
ubi_dbg_is_write_failure(const struct ubi_device *ubi) { return 0; }
|
|
static inline int
|
|
ubi_dbg_is_erase_failure(const struct ubi_device *ubi) { return 0; }
|
|
|
|
#endif /* !CONFIG_MTD_UBI_DEBUG */
|
|
#endif /* !__UBI_DEBUG_H__ */
|