Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 58 insertions, 0 deletions

diff --git a/drivers/md/dm-bio-record.h b/drivers/md/dm-bio-record.h
new file mode 100644
index 000000000..2ea036010
--- /dev/null
+++ b/drivers/md/dm-bio-record.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ *
+ * This file is released under the GPL.
+ */
+
+#ifndef DM_BIO_RECORD_H
+#define DM_BIO_RECORD_H
+
+#include <linux/bio.h>
+
+/*
+ * There are lots of mutable fields in the bio struct that get
+ * changed by the lower levels of the block layer.  Some targets,
+ * such as multipath, may wish to resubmit a bio on error.  The
+ * functions in this file help the target record and restore the
+ * original bio state.
+ */
+
+struct dm_bio_details {
+	struct gendisk *bi_disk;
+	u8 bi_partno;
+	int __bi_remaining;
+	unsigned long bi_flags;
+	struct bvec_iter bi_iter;
+	bio_end_io_t *bi_end_io;
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
+	struct bio_integrity_payload *bi_integrity;
+#endif
+};
+
+static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
+{
+	bd->bi_disk = bio->bi_disk;
+	bd->bi_partno = bio->bi_partno;
+	bd->bi_flags = bio->bi_flags;
+	bd->bi_iter = bio->bi_iter;
+	bd->__bi_remaining = atomic_read(&bio->__bi_remaining);
+	bd->bi_end_io = bio->bi_end_io;
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
+	bd->bi_integrity = bio_integrity(bio);
+#endif
+}
+
+static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
+{
+	bio->bi_disk = bd->bi_disk;
+	bio->bi_partno = bd->bi_partno;
+	bio->bi_flags = bd->bi_flags;
+	bio->bi_iter = bd->bi_iter;
+	atomic_set(&bio->__bi_remaining, bd->__bi_remaining);
+	bio->bi_end_io = bd->bi_end_io;
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
+	bio->bi_integrity = bd->bi_integrity;
+#endif
+}
+
+#endif