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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_ERROR_H
#define _BCACHEFS_ERROR_H
#include <linux/list.h>
#include <linux/printk.h>
struct bch_dev;
struct bch_fs;
struct work_struct;
/*
* 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
*/
bool bch2_inconsistent_error(struct bch_fs *);
#define bch2_fs_inconsistent(c, ...) \
({ \
bch_err(c, __VA_ARGS__); \
bch2_inconsistent_error(c); \
})
#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,
};
enum fsck_err_opts {
FSCK_OPT_EXIT,
FSCK_OPT_YES,
FSCK_OPT_NO,
FSCK_OPT_ASK,
};
enum fsck_err_ret {
FSCK_ERR_IGNORE = 0,
FSCK_ERR_FIX = 1,
FSCK_ERR_EXIT = 2,
};
struct fsck_err_state {
struct list_head list;
const char *fmt;
u64 nr;
char buf[512];
};
#define FSCK_CAN_FIX (1 << 0)
#define FSCK_CAN_IGNORE (1 << 1)
#define FSCK_NEED_FSCK (1 << 2)
enum fsck_err_ret bch2_fsck_err(struct bch_fs *,
unsigned, const char *, ...);
void bch2_flush_fsck_errs(struct bch_fs *);
#define __fsck_err(c, _flags, msg, ...) \
({ \
int _fix = bch2_fsck_err(c, _flags, msg, ##__VA_ARGS__);\
\
if (_fix == FSCK_ERR_EXIT) { \
bch_err(c, "Unable to continue, halting"); \
ret = BCH_FSCK_ERRORS_NOT_FIXED; \
goto fsck_err; \
} \
\
_fix; \
})
/* These macros return true if error should be fixed: */
/* XXX: mark in superblock that filesystem contains errors, if we ignore: */
#define __fsck_err_on(cond, c, _flags, ...) \
((cond) ? __fsck_err(c, _flags, ##__VA_ARGS__) : false)
#define need_fsck_err_on(cond, c, ...) \
__fsck_err_on(cond, c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, ##__VA_ARGS__)
#define need_fsck_err(c, ...) \
__fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, ##__VA_ARGS__)
#define mustfix_fsck_err(c, ...) \
__fsck_err(c, FSCK_CAN_FIX, ##__VA_ARGS__)
#define mustfix_fsck_err_on(cond, c, ...) \
__fsck_err_on(cond, c, FSCK_CAN_FIX, ##__VA_ARGS__)
#define fsck_err(c, ...) \
__fsck_err(c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, ##__VA_ARGS__)
#define fsck_err_on(cond, c, ...) \
__fsck_err_on(cond, c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, ##__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; \
})
/*
* 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_io_error_work(struct work_struct *);
/* Does the error handling without logging a message */
void bch2_io_error(struct bch_dev *);
/* Logs message and handles the error: */
#define bch2_dev_io_error(ca, fmt, ...) \
do { \
printk_ratelimited(KERN_ERR bch2_fmt((ca)->fs, \
"IO error on %s for " fmt), \
(ca)->name, ##__VA_ARGS__); \
bch2_io_error(ca); \
} while (0)
#define bch2_dev_io_err_on(cond, ca, ...) \
({ \
bool _ret = (cond); \
\
if (_ret) \
bch2_dev_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_status = BLK_STS_IOERR; \
} while (0)
#endif /* _BCACHEFS_ERROR_H */
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