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#ifndef _BCACHE_ERROR_H
#define _BCACHE_ERROR_H
#include <linux/printk.h>
struct bch_dev;
struct bch_fs;
/*
* XXX: separate out errors that indicate on disk data is inconsistent, and flag
* superblock as such
*/
/* Error messages: */
/*
* Very fatal logic/inconsistency errors: these indicate that we've majorly
* screwed up at runtime, i.e. it's not likely that it was just caused by the
* data on disk being inconsistent. These BUG():
*
* XXX: audit and convert to inconsistent() checks
*/
#define bch2_fs_bug(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
BUG(); \
} while (0)
#define bch2_fs_bug_on(cond, c, ...) \
do { \
if (cond) \
bch2_fs_bug(c, __VA_ARGS__); \
} while (0)
/*
* Inconsistency errors: The on disk data is inconsistent. If these occur during
* initial recovery, they don't indicate a bug in the running code - we walk all
* the metadata before modifying anything. If they occur at runtime, they
* indicate either a bug in the running code or (less likely) data is being
* silently corrupted under us.
*
* XXX: audit all inconsistent errors and make sure they're all recoverable, in
* BCH_ON_ERROR_CONTINUE mode
*/
void bch2_inconsistent_error(struct bch_fs *);
#define bch2_fs_inconsistent(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
bch2_inconsistent_error(c); \
} while (0)
#define bch2_fs_inconsistent_on(cond, c, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
bch2_fs_inconsistent(c, __VA_ARGS__); \
_ret; \
})
/*
* Later we might want to mark only the particular device inconsistent, not the
* entire filesystem:
*/
#define bch2_dev_inconsistent(ca, ...) \
do { \
bch_err(ca, __VA_ARGS__); \
bch2_inconsistent_error((ca)->fs); \
} while (0)
#define bch2_dev_inconsistent_on(cond, ca, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
bch2_dev_inconsistent(ca, __VA_ARGS__); \
_ret; \
})
/*
* Fsck errors: inconsistency errors we detect at mount time, and should ideally
* be able to repair:
*/
enum {
BCH_FSCK_OK = 0,
BCH_FSCK_ERRORS_NOT_FIXED = 1,
BCH_FSCK_REPAIR_UNIMPLEMENTED = 2,
BCH_FSCK_REPAIR_IMPOSSIBLE = 3,
BCH_FSCK_UNKNOWN_VERSION = 4,
};
/* These macros return true if error should be fixed: */
/* XXX: mark in superblock that filesystem contains errors, if we ignore: */
#ifndef __fsck_err
#define __fsck_err(c, _can_fix, _can_ignore, _nofix_msg, msg, ...) \
({ \
bool _fix = false; \
\
if (_can_fix && (c)->opts.fix_errors) { \
bch_err(c, msg ", fixing", ##__VA_ARGS__); \
set_bit(BCH_FS_FSCK_FIXED_ERRORS, &(c)->flags); \
_fix = true; \
} else if (_can_ignore && \
(c)->opts.errors == BCH_ON_ERROR_CONTINUE) { \
bch_err(c, msg " (ignoring)", ##__VA_ARGS__); \
} else { \
bch_err(c, msg " ("_nofix_msg")", ##__VA_ARGS__); \
ret = BCH_FSCK_ERRORS_NOT_FIXED; \
goto fsck_err; \
} \
\
BUG_ON(!_fix && !_can_ignore); \
_fix; \
})
#endif
#define __fsck_err_on(cond, c, _can_fix, _can_ignore, _nofix_msg, ...) \
((cond) ? __fsck_err(c, _can_fix, _can_ignore, \
_nofix_msg, ##__VA_ARGS__) : false)
#define unfixable_fsck_err_on(cond, c, ...) \
__fsck_err_on(cond, c, false, true, "repair unimplemented", ##__VA_ARGS__)
#define need_fsck_err_on(cond, c, ...) \
__fsck_err_on(cond, c, false, true, "run fsck to correct", ##__VA_ARGS__)
#define mustfix_fsck_err(c, ...) \
__fsck_err(c, true, false, "not fixing", ##__VA_ARGS__)
#define mustfix_fsck_err_on(cond, c, ...) \
__fsck_err_on(cond, c, true, false, "not fixing", ##__VA_ARGS__)
#define fsck_err_on(cond, c, ...) \
__fsck_err_on(cond, c, true, true, "not fixing", ##__VA_ARGS__)
/*
* Fatal errors: these don't indicate a bug, but we can't continue running in RW
* mode - pretty much just due to metadata IO errors:
*/
void bch2_fatal_error(struct bch_fs *);
#define bch2_fs_fatal_error(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
bch2_fatal_error(c); \
} while (0)
#define bch2_fs_fatal_err_on(cond, c, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
bch2_fs_fatal_error(c, __VA_ARGS__); \
_ret; \
})
#define bch2_dev_fatal_error(ca, ...) \
do { \
bch_err(ca, __VA_ARGS__); \
bch2_fatal_error(c); \
} while (0)
#define bch2_dev_fatal_io_error(ca, fmt, ...) \
do { \
printk_ratelimited(KERN_ERR bch2_fmt((ca)->fs, \
"fatal IO error on %s for " fmt), \
(ca)->name, ##__VA_ARGS__); \
bch2_fatal_error((ca)->fs); \
} while (0)
#define bch2_dev_fatal_io_err_on(cond, ca, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
bch2_dev_fatal_io_error(ca, __VA_ARGS__); \
_ret; \
})
/*
* Nonfatal IO errors: either recoverable metadata IO (because we have
* replicas), or data IO - we need to log it and print out a message, but we
* don't (necessarily) want to shut down the fs:
*/
void bch2_nonfatal_io_error_work(struct work_struct *);
/* Does the error handling without logging a message */
void bch2_nonfatal_io_error(struct bch_dev *);
#if 0
#define bch2_fs_nonfatal_io_error(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
bch2_nonfatal_io_error(c); \
} while (0)
#endif
/* Logs message and handles the error: */
#define bch2_dev_nonfatal_io_error(ca, fmt, ...) \
do { \
printk_ratelimited(KERN_ERR bch2_fmt((ca)->fs, \
"IO error on %s for " fmt), \
(ca)->name, ##__VA_ARGS__); \
bch2_nonfatal_io_error(ca); \
} while (0)
#define bch2_dev_nonfatal_io_err_on(cond, ca, ...) \
({ \
bool _ret = (cond); \
\
if (_ret) \
bch2_dev_nonfatal_io_error(ca, __VA_ARGS__); \
_ret; \
})
/* kill? */
#define __bcache_io_error(c, fmt, ...) \
printk_ratelimited(KERN_ERR bch2_fmt(c, \
"IO error: " fmt), ##__VA_ARGS__)
#define bcache_io_error(c, bio, fmt, ...) \
do { \
__bcache_io_error(c, fmt, ##__VA_ARGS__); \
(bio)->bi_error = -EIO; \
} while (0)
#endif /* _BCACHE_ERROR_H */
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