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#ifndef _BCACHE_ERROR_H
#define _BCACHE_ERROR_H
#include <linux/printk.h>
struct cache;
struct cache_set;
/*
* XXX: separate out errors that indicate on disk data is inconsistent, and flag
* superblock as such
*/
/* Error messages: */
#define __bch_cache_error(ca, fmt, ...) \
do { \
char _buf[BDEVNAME_SIZE]; \
bch_err((ca)->set, "%s: " fmt, \
bdevname((ca)->disk_sb.bdev, _buf), ##__VA_ARGS__); \
} while (0)
/*
* 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 cache_set_bug(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
BUG(); \
} while (0)
#define cache_set_bug_on(cond, c, ...) \
do { \
if (cond) \
cache_set_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 bch_inconsistent_error(struct cache_set *);
#define cache_set_inconsistent(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
bch_inconsistent_error(c); \
} while (0)
#define cache_set_inconsistent_on(cond, c, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
cache_set_inconsistent(c, __VA_ARGS__); \
_ret; \
})
/*
* Later we might want to mark only the particular device inconsistent, not the
* entire cache set:
*/
#define cache_inconsistent(ca, ...) \
do { \
__bch_cache_error(ca, __VA_ARGS__); \
bch_inconsistent_error((ca)->set); \
} while (0)
#define cache_inconsistent_on(cond, ca, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
cache_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,
};
#define unfixable_fsck_err(c, msg, ...) \
do { \
bch_err(c, msg " (repair unimplemented)", ##__VA_ARGS__); \
ret = BCH_FSCK_REPAIR_UNIMPLEMENTED; \
goto fsck_err; \
} while (0)
#define unfixable_fsck_err_on(cond, c, ...) \
do { \
if (cond) \
unfixable_fsck_err(c, __VA_ARGS__); \
} while (0)
#define fsck_err(c, msg, ...) \
do { \
if (!(c)->opts.fix_errors) { \
bch_err(c, msg, ##__VA_ARGS__); \
ret = BCH_FSCK_ERRORS_NOT_FIXED; \
goto fsck_err; \
} \
set_bit(CACHE_SET_FSCK_FIXED_ERRORS, &(c)->flags); \
bch_err(c, msg ", fixing", ##__VA_ARGS__); \
} while (0)
#define fsck_err_on(cond, c, ...) \
({ \
bool _ret = (cond); \
\
if (_ret) \
fsck_err(c, __VA_ARGS__); \
_ret; \
})
/*
* 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 bch_fatal_error(struct cache_set *);
#define cache_set_fatal_error(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
bch_fatal_error(c); \
} while (0)
#define cache_set_fatal_err_on(cond, c, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
cache_set_fatal_error(c, __VA_ARGS__); \
_ret; \
})
#define cache_fatal_error(ca, ...) \
do { \
__bch_cache_error(ca, __VA_ARGS__); \
bch_fatal_error(c); \
} while (0)
#define cache_fatal_io_error(ca, fmt, ...) \
do { \
char _buf[BDEVNAME_SIZE]; \
\
printk_ratelimited(KERN_ERR bch_fmt((ca)->set, \
"fatal IO error on %s for " fmt), \
bdevname((ca)->disk_sb.bdev, _buf), ##__VA_ARGS__); \
bch_fatal_error((ca)->set); \
} while (0)
#define cache_fatal_io_err_on(cond, ca, ...) \
({ \
int _ret = !!(cond); \
\
if (_ret) \
cache_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 bch_account_io_completion(struct cache *);
void bch_account_io_completion_time(struct cache *, unsigned, int);
void bch_nonfatal_io_error_work(struct work_struct *);
/* Does the error handling without logging a message */
void bch_nonfatal_io_error(struct cache *);
#if 0
#define cache_set_nonfatal_io_error(c, ...) \
do { \
bch_err(c, __VA_ARGS__); \
bch_nonfatal_io_error(c); \
} while (0)
#endif
/* Logs message and handles the error: */
#define cache_nonfatal_io_error(ca, fmt, ...) \
do { \
char _buf[BDEVNAME_SIZE]; \
\
printk_ratelimited(KERN_ERR bch_fmt((ca)->set, \
"IO error on %s for " fmt), \
bdevname((ca)->disk_sb.bdev, _buf), ##__VA_ARGS__); \
bch_nonfatal_io_error(ca); \
} while (0)
#define cache_nonfatal_io_err_on(cond, ca, ...) \
({ \
bool _ret = (cond); \
\
if (_ret) \
cache_nonfatal_io_error(ca, __VA_ARGS__); \
_ret; \
})
/* kill? */
#define __bcache_io_error(c, fmt, ...) \
printk_ratelimited(KERN_ERR bch_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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