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