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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: */
/*
* 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 *);
void bch2_topology_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, ...) \
({ \
bool _ret = unlikely(!!(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, ...) \
({ \
bool _ret = unlikely(!!(cond)); \
\
if (_ret) \
bch2_dev_inconsistent(ca, __VA_ARGS__); \
_ret; \
})
/*
* When a transaction update discovers or is causing a fs inconsistency, it's
* helpful to also dump the pending updates:
*/
#define bch2_trans_inconsistent(trans, ...) \
({ \
bch_err(trans->c, __VA_ARGS__); \
bch2_dump_trans_updates(trans); \
bch2_inconsistent_error(trans->c); \
})
#define bch2_trans_inconsistent_on(cond, trans, ...) \
({ \
bool _ret = unlikely(!!(cond)); \
\
if (_ret) \
bch2_trans_inconsistent(trans, __VA_ARGS__); \
_ret; \
})
/*
* Fsck errors: inconsistency errors we detect at mount time, and should ideally
* be able to repair:
*/
struct fsck_err_state {
struct list_head list;
const char *fmt;
u64 nr;
bool ratelimited;
int ret;
int fix;
char *last_msg;
};
#define FSCK_CAN_FIX (1 << 0)
#define FSCK_CAN_IGNORE (1 << 1)
#define FSCK_NEED_FSCK (1 << 2)
#define FSCK_NO_RATELIMIT (1 << 3)
__printf(3, 4) __cold
int bch2_fsck_err(struct bch_fs *, unsigned, const char *, ...);
void bch2_flush_fsck_errs(struct bch_fs *);
#define __fsck_err(c, _flags, msg, ...) \
({ \
int _ret = bch2_fsck_err(c, _flags, msg, ##__VA_ARGS__); \
\
if (_ret != -BCH_ERR_fsck_fix && \
_ret != -BCH_ERR_fsck_ignore) { \
ret = _ret; \
goto fsck_err; \
} \
\
_ret == -BCH_ERR_fsck_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, ...) \
(unlikely(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, ...) \
({ \
bool _ret = unlikely(!!(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 *);
#define bch2_dev_io_err_on(cond, ca, ...) \
({ \
bool _ret = (cond); \
\
if (_ret) { \
bch_err_dev_ratelimited(ca, __VA_ARGS__); \
bch2_io_error(ca); \
} \
_ret; \
})
#define bch2_dev_inum_io_err_on(cond, ca, ...) \
({ \
bool _ret = (cond); \
\
if (_ret) { \
bch_err_inum_offset_ratelimited(ca, __VA_ARGS__); \
bch2_io_error(ca); \
} \
_ret; \
})
#endif /* _BCACHEFS_ERROR_H */
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