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79032b0781
Consolidate bch2_gc_check_topology() and btree_node_interior_verify(), and replace them with an improved version, bch2_btree_node_check_topology(). This checks that children of an interior node correctly span the full range of the parent node with no overlaps. Also, ensure that topology repairs at runtime are always a fatal error; in particular, this adds a check in btree_iter_down() - if we don't find a key while walking down the btree that's indicative of a topology error and should be flagged as such, not a null ptr deref. Some checks in btree_update_interior.c remaining BUG_ONS(), because we already checked the node for topology errors when starting the update, and the assertions indicate that we _just_ corrupted the btree node - i.e. the problem can't be that existing on disk corruption, they indicate an actual algorithmic bug. In the future, we'll be annotating the fsck errors list with which recovery pass corrects them; the open coded "run explicit recovery pass or fatal error" in bch2_btree_node_check_topology() will in the future be done for every fsck_err() call. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
249 lines
6.3 KiB
C
249 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_ERROR_H
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#define _BCACHEFS_ERROR_H
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#include <linux/list.h>
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#include <linux/printk.h>
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#include "sb-errors.h"
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struct bch_dev;
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struct bch_fs;
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struct work_struct;
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/*
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* XXX: separate out errors that indicate on disk data is inconsistent, and flag
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* superblock as such
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*/
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/* Error messages: */
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/*
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* Inconsistency errors: The on disk data is inconsistent. If these occur during
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* initial recovery, they don't indicate a bug in the running code - we walk all
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* the metadata before modifying anything. If they occur at runtime, they
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* indicate either a bug in the running code or (less likely) data is being
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* silently corrupted under us.
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*
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* XXX: audit all inconsistent errors and make sure they're all recoverable, in
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* BCH_ON_ERROR_CONTINUE mode
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*/
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bool bch2_inconsistent_error(struct bch_fs *);
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int bch2_topology_error(struct bch_fs *);
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#define bch2_fs_topology_error(c, ...) \
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({ \
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bch_err(c, "btree topology error: " __VA_ARGS__); \
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bch2_topology_error(c); \
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})
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#define bch2_fs_inconsistent(c, ...) \
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({ \
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bch_err(c, __VA_ARGS__); \
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bch2_inconsistent_error(c); \
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})
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#define bch2_fs_inconsistent_on(cond, c, ...) \
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({ \
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bool _ret = unlikely(!!(cond)); \
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\
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if (_ret) \
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bch2_fs_inconsistent(c, __VA_ARGS__); \
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_ret; \
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})
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/*
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* Later we might want to mark only the particular device inconsistent, not the
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* entire filesystem:
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*/
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#define bch2_dev_inconsistent(ca, ...) \
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do { \
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bch_err(ca, __VA_ARGS__); \
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bch2_inconsistent_error((ca)->fs); \
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} while (0)
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#define bch2_dev_inconsistent_on(cond, ca, ...) \
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({ \
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bool _ret = unlikely(!!(cond)); \
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\
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if (_ret) \
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bch2_dev_inconsistent(ca, __VA_ARGS__); \
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_ret; \
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})
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/*
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* When a transaction update discovers or is causing a fs inconsistency, it's
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* helpful to also dump the pending updates:
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*/
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#define bch2_trans_inconsistent(trans, ...) \
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({ \
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bch_err(trans->c, __VA_ARGS__); \
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bch2_dump_trans_updates(trans); \
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bch2_inconsistent_error(trans->c); \
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})
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#define bch2_trans_inconsistent_on(cond, trans, ...) \
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({ \
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bool _ret = unlikely(!!(cond)); \
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\
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if (_ret) \
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bch2_trans_inconsistent(trans, __VA_ARGS__); \
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_ret; \
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})
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/*
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* Fsck errors: inconsistency errors we detect at mount time, and should ideally
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* be able to repair:
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*/
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struct fsck_err_state {
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struct list_head list;
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const char *fmt;
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u64 nr;
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bool ratelimited;
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int ret;
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int fix;
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char *last_msg;
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};
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enum bch_fsck_flags {
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FSCK_CAN_FIX = 1 << 0,
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FSCK_CAN_IGNORE = 1 << 1,
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FSCK_NEED_FSCK = 1 << 2,
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FSCK_NO_RATELIMIT = 1 << 3,
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};
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#define fsck_err_count(_c, _err) bch2_sb_err_count(_c, BCH_FSCK_ERR_##_err)
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__printf(4, 5) __cold
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int bch2_fsck_err(struct bch_fs *,
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enum bch_fsck_flags,
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enum bch_sb_error_id,
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const char *, ...);
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void bch2_flush_fsck_errs(struct bch_fs *);
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#define __fsck_err(c, _flags, _err_type, ...) \
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({ \
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int _ret = bch2_fsck_err(c, _flags, BCH_FSCK_ERR_##_err_type, \
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__VA_ARGS__); \
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\
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if (_ret != -BCH_ERR_fsck_fix && \
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_ret != -BCH_ERR_fsck_ignore) { \
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ret = _ret; \
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goto fsck_err; \
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} \
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\
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_ret == -BCH_ERR_fsck_fix; \
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})
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/* These macros return true if error should be fixed: */
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/* XXX: mark in superblock that filesystem contains errors, if we ignore: */
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#define __fsck_err_on(cond, c, _flags, _err_type, ...) \
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(unlikely(cond) ? __fsck_err(c, _flags, _err_type, __VA_ARGS__) : false)
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#define need_fsck_err_on(cond, c, _err_type, ...) \
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__fsck_err_on(cond, c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, _err_type, __VA_ARGS__)
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#define need_fsck_err(c, _err_type, ...) \
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__fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, _err_type, __VA_ARGS__)
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#define mustfix_fsck_err(c, _err_type, ...) \
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__fsck_err(c, FSCK_CAN_FIX, _err_type, __VA_ARGS__)
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#define mustfix_fsck_err_on(cond, c, _err_type, ...) \
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__fsck_err_on(cond, c, FSCK_CAN_FIX, _err_type, __VA_ARGS__)
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#define fsck_err(c, _err_type, ...) \
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__fsck_err(c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, _err_type, __VA_ARGS__)
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#define fsck_err_on(cond, c, _err_type, ...) \
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__fsck_err_on(cond, c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, _err_type, __VA_ARGS__)
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__printf(4, 0)
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static inline void bch2_bkey_fsck_err(struct bch_fs *c,
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struct printbuf *err_msg,
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enum bch_sb_error_id err_type,
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const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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prt_vprintf(err_msg, fmt, args);
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va_end(args);
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}
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#define bkey_fsck_err(c, _err_msg, _err_type, ...) \
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do { \
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prt_printf(_err_msg, __VA_ARGS__); \
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bch2_sb_error_count(c, BCH_FSCK_ERR_##_err_type); \
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ret = -BCH_ERR_invalid_bkey; \
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goto fsck_err; \
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} while (0)
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#define bkey_fsck_err_on(cond, ...) \
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do { \
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if (unlikely(cond)) \
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bkey_fsck_err(__VA_ARGS__); \
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} while (0)
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/*
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* Fatal errors: these don't indicate a bug, but we can't continue running in RW
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* mode - pretty much just due to metadata IO errors:
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*/
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void bch2_fatal_error(struct bch_fs *);
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#define bch2_fs_fatal_error(c, _msg, ...) \
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do { \
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bch_err(c, "%s(): fatal error " _msg, __func__, ##__VA_ARGS__); \
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bch2_fatal_error(c); \
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} while (0)
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#define bch2_fs_fatal_err_on(cond, c, ...) \
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({ \
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bool _ret = unlikely(!!(cond)); \
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\
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if (_ret) \
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bch2_fs_fatal_error(c, __VA_ARGS__); \
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_ret; \
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})
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/*
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* IO errors: either recoverable metadata IO (because we have replicas), or data
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* IO - we need to log it and print out a message, but we don't (necessarily)
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* want to shut down the fs:
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*/
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void bch2_io_error_work(struct work_struct *);
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/* Does the error handling without logging a message */
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void bch2_io_error(struct bch_dev *, enum bch_member_error_type);
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#define bch2_dev_io_err_on(cond, ca, _type, ...) \
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({ \
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bool _ret = (cond); \
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\
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if (_ret) { \
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bch_err_dev_ratelimited(ca, __VA_ARGS__); \
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bch2_io_error(ca, _type); \
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} \
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_ret; \
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})
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#define bch2_dev_inum_io_err_on(cond, ca, _type, ...) \
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({ \
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bool _ret = (cond); \
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\
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if (_ret) { \
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bch_err_inum_offset_ratelimited(ca, __VA_ARGS__); \
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bch2_io_error(ca, _type); \
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} \
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_ret; \
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})
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#endif /* _BCACHEFS_ERROR_H */
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