linux-kernel - [PATCH 1/5] bcachefs: bch2_bio_to

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Message-ID: <20250421172607.1781982-2-kent.overstreet@linux.dev>
Date: Mon, 21 Apr 2025 13:26:01 -0400
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: linux-bcachefs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Kent Overstreet <kent.overstreet@...ux.dev>
Subject: [PATCH 1/5] bcachefs: bch2_bio_to_text()

Pretty printer for struct bio, to be used for async object debugging.

This is pretty minimal, we'll add more to it as we discover what we
need.

Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
---
 fs/bcachefs/util.c | 10 ++++++++++
 fs/bcachefs/util.h |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/fs/bcachefs/util.c b/fs/bcachefs/util.c
index 6e5d7fc265bd..7e6ebe8cd9ea 100644
--- a/fs/bcachefs/util.c
+++ b/fs/bcachefs/util.c
@@ -715,6 +715,16 @@ void bch2_corrupt_bio(struct bio *bio)
 }
 #endif
 
+void bch2_bio_to_text(struct printbuf *out, struct bio *bio)
+{
+	prt_printf(out, "bi_remaining:\t%u\n",
+		   atomic_read(&bio->__bi_remaining));
+	prt_printf(out, "bi_end_io:\t%ps\n",
+		   bio->bi_end_io);
+	prt_printf(out, "bi_status:\t%u\n",
+		   bio->bi_status);
+}
+
 #if 0
 void eytzinger1_test(void)
 {
diff --git a/fs/bcachefs/util.h b/fs/bcachefs/util.h
index 50f7197c67fc..7a93e187a49a 100644
--- a/fs/bcachefs/util.h
+++ b/fs/bcachefs/util.h
@@ -419,6 +419,8 @@ static inline void bch2_maybe_corrupt_bio(struct bio *bio, unsigned ratio)
 #define bch2_maybe_corrupt_bio(...)	do {} while (0)
 #endif
 
+void bch2_bio_to_text(struct printbuf *, struct bio *);
+
 static inline void memcpy_u64s_small(void *dst, const void *src,
 				     unsigned u64s)
 {
-- 
2.49.0