Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 242 insertions, 0 deletions

diff --git a/fs/bcachefs/error.h b/fs/bcachefs/error.h
new file mode 100644
index 0000000000..fec17d1353
--- /dev/null
+++ b/fs/bcachefs/error.h
@@ -0,0 +1,242 @@
+/* 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 */