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root/fs/jffs2/debug.h

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/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright © 2001-2007 Red Hat, Inc.
 *
 * Created by David Woodhouse <dwmw2@infradead.org>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 */

#ifndef _JFFS2_DEBUG_H_
#define _JFFS2_DEBUG_H_

#include <linux/sched.h>

#ifndef CONFIG_JFFS2_FS_DEBUG
#define CONFIG_JFFS2_FS_DEBUG 0
#endif

#if CONFIG_JFFS2_FS_DEBUG > 0
/* Enable "paranoia" checks and dumps */
#define JFFS2_DBG_PARANOIA_CHECKS
#define JFFS2_DBG_DUMPS

/*
 * By defining/undefining the below macros one may select debugging messages
 * fro specific JFFS2 subsystems.
 */
#define JFFS2_DBG_READINODE_MESSAGES
#define JFFS2_DBG_FRAGTREE_MESSAGES
#define JFFS2_DBG_DENTLIST_MESSAGES
#define JFFS2_DBG_NODEREF_MESSAGES
#define JFFS2_DBG_INOCACHE_MESSAGES
#define JFFS2_DBG_SUMMARY_MESSAGES
#define JFFS2_DBG_FSBUILD_MESSAGES
#endif

#if CONFIG_JFFS2_FS_DEBUG > 1
#define JFFS2_DBG_FRAGTREE2_MESSAGES
#define JFFS2_DBG_READINODE2_MESSAGES
#define JFFS2_DBG_MEMALLOC_MESSAGES
#endif

/* Sanity checks are supposed to be light-weight and enabled by default */
#define JFFS2_DBG_SANITY_CHECKS

/*
 * Dx() are mainly used for debugging messages, they must go away and be
 * superseded by nicer dbg_xxx() macros...
 */
#if CONFIG_JFFS2_FS_DEBUG > 0
#define D1(x) x
#else
#define D1(x)
#endif

#if CONFIG_JFFS2_FS_DEBUG > 1
#define D2(x) x
#else
#define D2(x)
#endif

/* The prefixes of JFFS2 messages */
#define JFFS2_DBG_PREFIX        "[JFFS2 DBG]"
#define JFFS2_ERR_PREFIX        "JFFS2 error:"
#define JFFS2_WARN_PREFIX       "JFFS2 warning:"
#define JFFS2_NOTICE_PREFIX     "JFFS2 notice:"

#define JFFS2_ERR       KERN_ERR
#define JFFS2_WARN      KERN_WARNING
#define JFFS2_NOT       KERN_NOTICE
#define JFFS2_DBG       KERN_DEBUG

#define JFFS2_DBG_MSG_PREFIX    JFFS2_DBG JFFS2_DBG_PREFIX
#define JFFS2_ERR_MSG_PREFIX    JFFS2_ERR JFFS2_ERR_PREFIX
#define JFFS2_WARN_MSG_PREFIX   JFFS2_WARN JFFS2_WARN_PREFIX
#define JFFS2_NOTICE_MSG_PREFIX JFFS2_NOT JFFS2_NOTICE_PREFIX

/* JFFS2 message macros */
#define JFFS2_ERROR(fmt, ...)                                           \
        do {                                                            \
                printk(JFFS2_ERR_MSG_PREFIX                             \
                        " (%d) %s: " fmt, task_pid_nr(current),         \
                        __func__ , ##__VA_ARGS__);                      \
        } while(0)

#define JFFS2_WARNING(fmt, ...)                                         \
        do {                                                            \
                printk(JFFS2_WARN_MSG_PREFIX                            \
                        " (%d) %s: " fmt, task_pid_nr(current),         \
                        __func__ , ##__VA_ARGS__);                      \
        } while(0)

#define JFFS2_NOTICE(fmt, ...)                                          \
        do {                                                            \
                printk(JFFS2_NOTICE_MSG_PREFIX                          \
                        " (%d) %s: " fmt, task_pid_nr(current),         \
                        __func__ , ##__VA_ARGS__);                      \
        } while(0)

#define JFFS2_DEBUG(fmt, ...)                                           \
        do {                                                            \
                printk(JFFS2_DBG_MSG_PREFIX                             \
                        " (%d) %s: " fmt, task_pid_nr(current),         \
                        __func__ , ##__VA_ARGS__);                      \
        } while(0)

/*
 * We split our debugging messages on several parts, depending on the JFFS2
 * subsystem the message belongs to.
 */
/* Read inode debugging messages */
#ifdef JFFS2_DBG_READINODE_MESSAGES
#define dbg_readinode(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_readinode(fmt, ...)
#endif
#ifdef JFFS2_DBG_READINODE2_MESSAGES
#define dbg_readinode2(fmt, ...)        JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_readinode2(fmt, ...)
#endif

/* Fragtree build debugging messages */
#ifdef JFFS2_DBG_FRAGTREE_MESSAGES
#define dbg_fragtree(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_fragtree(fmt, ...)
#endif
#ifdef JFFS2_DBG_FRAGTREE2_MESSAGES
#define dbg_fragtree2(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_fragtree2(fmt, ...)
#endif

/* Directory entry list manilulation debugging messages */
#ifdef JFFS2_DBG_DENTLIST_MESSAGES
#define dbg_dentlist(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_dentlist(fmt, ...)
#endif

/* Print the messages about manipulating node_refs */
#ifdef JFFS2_DBG_NODEREF_MESSAGES
#define dbg_noderef(fmt, ...)   JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_noderef(fmt, ...)
#endif

/* Manipulations with the list of inodes (JFFS2 inocache) */
#ifdef JFFS2_DBG_INOCACHE_MESSAGES
#define dbg_inocache(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_inocache(fmt, ...)
#endif

/* Summary debugging messages */
#ifdef JFFS2_DBG_SUMMARY_MESSAGES
#define dbg_summary(fmt, ...)   JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_summary(fmt, ...)
#endif

/* File system build messages */
#ifdef JFFS2_DBG_FSBUILD_MESSAGES
#define dbg_fsbuild(fmt, ...)   JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_fsbuild(fmt, ...)
#endif

/* Watch the object allocations */
#ifdef JFFS2_DBG_MEMALLOC_MESSAGES
#define dbg_memalloc(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_memalloc(fmt, ...)
#endif

/* Watch the XATTR subsystem */
#ifdef JFFS2_DBG_XATTR_MESSAGES
#define dbg_xattr(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
#else
#define dbg_xattr(fmt, ...)
#endif 

/* "Sanity" checks */
void
__jffs2_dbg_acct_sanity_check_nolock(struct jffs2_sb_info *c,
                                     struct jffs2_eraseblock *jeb);
void
__jffs2_dbg_acct_sanity_check(struct jffs2_sb_info *c,
                              struct jffs2_eraseblock *jeb);

/* "Paranoia" checks */
void
__jffs2_dbg_fragtree_paranoia_check(struct jffs2_inode_info *f);
void
__jffs2_dbg_fragtree_paranoia_check_nolock(struct jffs2_inode_info *f);
void
__jffs2_dbg_acct_paranoia_check(struct jffs2_sb_info *c,
                                struct jffs2_eraseblock *jeb);
void
__jffs2_dbg_acct_paranoia_check_nolock(struct jffs2_sb_info *c,
                                       struct jffs2_eraseblock *jeb);
void
__jffs2_dbg_prewrite_paranoia_check(struct jffs2_sb_info *c,
                                    uint32_t ofs, int len);

/* "Dump" functions */
void
__jffs2_dbg_dump_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
void
__jffs2_dbg_dump_jeb_nolock(struct jffs2_eraseblock *jeb);
void
__jffs2_dbg_dump_block_lists(struct jffs2_sb_info *c);
void
__jffs2_dbg_dump_block_lists_nolock(struct jffs2_sb_info *c);
void
__jffs2_dbg_dump_node_refs(struct jffs2_sb_info *c,
                           struct jffs2_eraseblock *jeb);
void
__jffs2_dbg_dump_node_refs_nolock(struct jffs2_sb_info *c,
                                  struct jffs2_eraseblock *jeb);
void
__jffs2_dbg_dump_fragtree(struct jffs2_inode_info *f);
void
__jffs2_dbg_dump_fragtree_nolock(struct jffs2_inode_info *f);
void
__jffs2_dbg_dump_buffer(unsigned char *buf, int len, uint32_t offs);
void
__jffs2_dbg_dump_node(struct jffs2_sb_info *c, uint32_t ofs);

#ifdef JFFS2_DBG_PARANOIA_CHECKS
#define jffs2_dbg_fragtree_paranoia_check(f)                    \
        __jffs2_dbg_fragtree_paranoia_check(f)
#define jffs2_dbg_fragtree_paranoia_check_nolock(f)             \
        __jffs2_dbg_fragtree_paranoia_check_nolock(f)
#define jffs2_dbg_acct_paranoia_check(c, jeb)                   \
        __jffs2_dbg_acct_paranoia_check(c,jeb)
#define jffs2_dbg_acct_paranoia_check_nolock(c, jeb)            \
        __jffs2_dbg_acct_paranoia_check_nolock(c,jeb)
#define jffs2_dbg_prewrite_paranoia_check(c, ofs, len)          \
        __jffs2_dbg_prewrite_paranoia_check(c, ofs, len)
#else
#define jffs2_dbg_fragtree_paranoia_check(f)
#define jffs2_dbg_fragtree_paranoia_check_nolock(f)
#define jffs2_dbg_acct_paranoia_check(c, jeb)
#define jffs2_dbg_acct_paranoia_check_nolock(c, jeb)
#define jffs2_dbg_prewrite_paranoia_check(c, ofs, len)
#endif /* !JFFS2_PARANOIA_CHECKS */

#ifdef JFFS2_DBG_DUMPS
#define jffs2_dbg_dump_jeb(c, jeb)                              \
        __jffs2_dbg_dump_jeb(c, jeb);
#define jffs2_dbg_dump_jeb_nolock(jeb)                          \
        __jffs2_dbg_dump_jeb_nolock(jeb);
#define jffs2_dbg_dump_block_lists(c)                           \
        __jffs2_dbg_dump_block_lists(c)
#define jffs2_dbg_dump_block_lists_nolock(c)                    \
        __jffs2_dbg_dump_block_lists_nolock(c)
#define jffs2_dbg_dump_fragtree(f)                              \
        __jffs2_dbg_dump_fragtree(f);
#define jffs2_dbg_dump_fragtree_nolock(f)                       \
        __jffs2_dbg_dump_fragtree_nolock(f);
#define jffs2_dbg_dump_buffer(buf, len, offs)                   \
        __jffs2_dbg_dump_buffer(*buf, len, offs);
#define jffs2_dbg_dump_node(c, ofs)                             \
        __jffs2_dbg_dump_node(c, ofs);
#else
#define jffs2_dbg_dump_jeb(c, jeb)
#define jffs2_dbg_dump_jeb_nolock(jeb)
#define jffs2_dbg_dump_block_lists(c)
#define jffs2_dbg_dump_block_lists_nolock(c)
#define jffs2_dbg_dump_fragtree(f)
#define jffs2_dbg_dump_fragtree_nolock(f)
#define jffs2_dbg_dump_buffer(buf, len, offs)
#define jffs2_dbg_dump_node(c, ofs)
#endif /* !JFFS2_DBG_DUMPS */

#ifdef JFFS2_DBG_SANITY_CHECKS
#define jffs2_dbg_acct_sanity_check(c, jeb)                     \
        __jffs2_dbg_acct_sanity_check(c, jeb)
#define jffs2_dbg_acct_sanity_check_nolock(c, jeb)              \
        __jffs2_dbg_acct_sanity_check_nolock(c, jeb)
#else
#define jffs2_dbg_acct_sanity_check(c, jeb)
#define jffs2_dbg_acct_sanity_check_nolock(c, jeb)
#endif /* !JFFS2_DBG_SANITY_CHECKS */

#endif /* _JFFS2_DEBUG_H_ */

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