bcachefs: BCH_JSET_ENTRY_log

Add a journal entry type for logging messages, and add an option to use
it to log the transaction name - this makes for a very handy debugging
tool, as with it we can use the 'bcachefs list_journal' command to see
not only what updates were done, but what was doing them.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/bcachefs/journal_io.c b/fs/bcachefs/journal_io.c
index 4f8dd0130b37..012b89e9d3cd 100644
--- a/fs/bcachefs/journal_io.c
+++ b/fs/bcachefs/journal_io.c
@@ -478,6 +478,14 @@ fsck_err:
 	return ret;
 }
 
+static int journal_entry_validate_log(struct bch_fs *c,
+				      const char *where,
+				      struct jset_entry *entry,
+				      unsigned version, int big_endian, int write)
+{
+	return 0;
+}
+
 struct jset_entry_ops {
 	int (*validate)(struct bch_fs *, const char *,
 			struct jset_entry *, unsigned, int, int);