[PATCH 03/34] bcachefs: errcode cleanup: journal errors

[Kent Overstreet <kent.overstreet@linux.dev>]

Instead of throwing standard error codes, we should be throwing
dedicated private error codes, this greatly improves debugability.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 fs/bcachefs/errcode.h | 2 ++
 fs/bcachefs/journal.c | 4 ++--
 fs/bcachefs/journal.h | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/fs/bcachefs/errcode.h b/fs/bcachefs/errcode.h
index 131b9bef21a0..c989ce4f715f 100644
--- a/fs/bcachefs/errcode.h
+++ b/fs/bcachefs/errcode.h
@@ -241,6 +241,8 @@
 	x(BCH_ERR_invalid_sb,		invalid_sb_downgrade)			\
 	x(BCH_ERR_invalid,		invalid_bkey)				\
 	x(BCH_ERR_operation_blocked,    nocow_lock_blocked)			\
+	x(EIO,				journal_shutdown)			\
+	x(EIO,				journal_flush_err)			\
 	x(EIO,				btree_node_read_err)			\
 	x(BCH_ERR_btree_node_read_err,	btree_node_read_err_cached)		\
 	x(EIO,				sb_not_downgraded)			\
diff --git a/fs/bcachefs/journal.c b/fs/bcachefs/journal.c
index 699db0d0749a..bbdd0b17ae69 100644
--- a/fs/bcachefs/journal.c
+++ b/fs/bcachefs/journal.c
@@ -673,7 +673,7 @@ void bch2_journal_entry_res_resize(struct journal *j,
  * @seq:	seq to flush
  * @parent:	closure object to wait with
  * Returns:	1 if @seq has already been flushed, 0 if @seq is being flushed,
- *		-EIO if @seq will never be flushed
+ *		-BCH_ERR_journal_flush_err if @seq will never be flushed
  *
  * Like bch2_journal_wait_on_seq, except that it triggers a write immediately if
  * necessary
@@ -696,7 +696,7 @@ int bch2_journal_flush_seq_async(struct journal *j, u64 seq,
 
 	/* Recheck under lock: */
 	if (j->err_seq && seq >= j->err_seq) {
-		ret = -EIO;
+		ret = -BCH_ERR_journal_flush_err;
 		goto out;
 	}
 
diff --git a/fs/bcachefs/journal.h b/fs/bcachefs/journal.h
index 71a50846967f..a6a2e888c59b 100644
--- a/fs/bcachefs/journal.h
+++ b/fs/bcachefs/journal.h
@@ -412,7 +412,7 @@ void bch2_journal_halt(struct journal *);
 static inline int bch2_journal_error(struct journal *j)
 {
 	return j->reservations.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL
-		? -EIO : 0;
+		? -BCH_ERR_journal_shutdown : 0;
 }
 
 struct bch_dev;
-- 
2.45.2