--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_ERROR_H
+#define _BCACHEFS_ERROR_H
+
+#include <linux/list.h>
+#include <linux/printk.h>
+#include "sb-errors.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;
+};
+
+enum bch_fsck_flags {
+ FSCK_CAN_FIX = 1 << 0,
+ FSCK_CAN_IGNORE = 1 << 1,
+ FSCK_NEED_FSCK = 1 << 2,
+ FSCK_NO_RATELIMIT = 1 << 3,
+};
+
+#define fsck_err_count(_c, _err) bch2_sb_err_count(_c, BCH_FSCK_ERR_##_err)
+
+__printf(4, 5) __cold
+int bch2_fsck_err(struct bch_fs *,
+ enum bch_fsck_flags,
+ enum bch_sb_error_id,
+ const char *, ...);
+void bch2_flush_fsck_errs(struct bch_fs *);
+
+#define __fsck_err(c, _flags, _err_type, ...) \
+({ \
+ int _ret = bch2_fsck_err(c, _flags, BCH_FSCK_ERR_##_err_type, \
+ __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, _err_type, ...) \
+ (unlikely(cond) ? __fsck_err(c, _flags, _err_type, __VA_ARGS__) : false)
+
+#define need_fsck_err_on(cond, c, _err_type, ...) \
+ __fsck_err_on(cond, c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, _err_type, __VA_ARGS__)
+
+#define need_fsck_err(c, _err_type, ...) \
+ __fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, _err_type, __VA_ARGS__)
+
+#define mustfix_fsck_err(c, _err_type, ...) \
+ __fsck_err(c, FSCK_CAN_FIX, _err_type, __VA_ARGS__)
+
+#define mustfix_fsck_err_on(cond, c, _err_type, ...) \
+ __fsck_err_on(cond, c, FSCK_CAN_FIX, _err_type, __VA_ARGS__)
+
+#define fsck_err(c, _err_type, ...) \
+ __fsck_err(c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, _err_type, __VA_ARGS__)
+
+#define fsck_err_on(cond, c, _err_type, ...) \
+ __fsck_err_on(cond, c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, _err_type, __VA_ARGS__)
+
+__printf(4, 0)
+static inline void bch2_bkey_fsck_err(struct bch_fs *c,
+ struct printbuf *err_msg,
+ enum bch_sb_error_id err_type,
+ const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ prt_vprintf(err_msg, fmt, args);
+ va_end(args);
+}
+
+#define bkey_fsck_err(c, _err_msg, _err_type, ...) \
+do { \
+ prt_printf(_err_msg, __VA_ARGS__); \
+ bch2_sb_error_count(c, BCH_FSCK_ERR_##_err_type); \
+ ret = -BCH_ERR_invalid_bkey; \
+ goto fsck_err; \
+} while (0)
+
+#define bkey_fsck_err_on(cond, ...) \
+do { \
+ if (unlikely(cond)) \
+ bkey_fsck_err(__VA_ARGS__); \
+} while (0)
+
+/*
+ * 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 *, enum bch_member_error_type);
+
+#define bch2_dev_io_err_on(cond, ca, _type, ...) \
+({ \
+ bool _ret = (cond); \
+ \
+ if (_ret) { \
+ bch_err_dev_ratelimited(ca, __VA_ARGS__); \
+ bch2_io_error(ca, _type); \
+ } \
+ _ret; \
+})
+
+#define bch2_dev_inum_io_err_on(cond, ca, _type, ...) \
+({ \
+ bool _ret = (cond); \
+ \
+ if (_ret) { \
+ bch_err_inum_offset_ratelimited(ca, __VA_ARGS__); \
+ bch2_io_error(ca, _type); \
+ } \
+ _ret; \
+})
+
+#endif /* _BCACHEFS_ERROR_H */
projects / bcachefs-tools-debian / blobdiff