bcachefs: trace_stripe_create

Add a simple tracepoint for stripe creation, we'll want to expand this
later.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

3 files changed, 31 insertions, 0 deletions

diff --git a/fs/bcachefs/ec.c b/fs/bcachefs/ec.c
index 84f232f4cbf8..37269c0f79b5 100644
--- a/fs/bcachefs/ec.c
+++ b/fs/bcachefs/ec.c
@@ -1486,6 +1486,7 @@ static void ec_stripe_create(struct ec_stripe_new *s)
 	if (s->err) {
 		if (!bch2_err_matches(s->err, EROFS))
 			bch_err(c, "error creating stripe: error writing data buckets");
+		ret = s->err;
 		goto err;
 	}
 
@@ -1494,6 +1495,7 @@ static void ec_stripe_create(struct ec_stripe_new *s)
 
 		if (ec_do_recov(c, &s->existing_stripe)) {
 			bch_err(c, "error creating stripe: error reading existing stripe");
+			ret = -BCH_ERR_ec_block_read;
 			goto err;
 		}
 
@@ -1519,6 +1521,7 @@ static void ec_stripe_create(struct ec_stripe_new *s)
 
 	if (ec_nr_failed(&s->new_stripe)) {
 		bch_err(c, "error creating stripe: error writing redundancy buckets");
+		ret = -BCH_ERR_ec_block_write;
 		goto err;
 	}
 
@@ -1540,6 +1543,8 @@ static void ec_stripe_create(struct ec_stripe_new *s)
 	if (ret)
 		goto err;
 err:
+	trace_stripe_create(c, s->idx, ret);
+
 	bch2_disk_reservation_put(c, &s->res);
 
 	for (i = 0; i < v->nr_blocks; i++)
diff --git a/fs/bcachefs/errcode.h b/fs/bcachefs/errcode.h
index d45ef03abc91..e14e0d1cc93d 100644
--- a/fs/bcachefs/errcode.h
+++ b/fs/bcachefs/errcode.h
@@ -280,6 +280,8 @@
 	x(EIO,				insufficient_journal_devices)		\
 	x(EIO,				device_offline)				\
 	x(EIO,				EIO_fault_injected)			\
+	x(EIO,				ec_block_read)				\
+	x(EIO,				ec_block_write)				\
 	x(BCH_ERR_btree_node_read_err,	btree_node_read_err_fixable)		\
 	x(BCH_ERR_btree_node_read_err,	btree_node_read_err_want_retry)		\
 	x(BCH_ERR_btree_node_read_err,	btree_node_read_err_must_retry)		\
diff --git a/fs/bcachefs/trace.h b/fs/bcachefs/trace.h
index 5718988dd7d6..c8669a6b9cec 100644
--- a/fs/bcachefs/trace.h
+++ b/fs/bcachefs/trace.h
@@ -339,6 +339,30 @@ DEFINE_EVENT(bio, io_read_reuse_race,
 	TP_ARGS(bio)
 );
 
+/* ec.c */
+
+TRACE_EVENT(stripe_create,
+	TP_PROTO(struct bch_fs *c, u64 idx, int ret),
+	TP_ARGS(c, idx, ret),
+
+	TP_STRUCT__entry(
+		__field(dev_t,		dev			)
+		__field(u64,		idx			)
+		__field(int,		ret			)
+	),
+
+	TP_fast_assign(
+		__entry->dev			= c->dev;
+		__entry->idx			= idx;
+		__entry->ret			= ret;
+	),
+
+	TP_printk("%d,%d idx %llu ret %i",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->idx,
+		  __entry->ret)
+);
+
 /* Journal */
 
 DEFINE_EVENT(bch_fs, journal_full,