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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/md/dm-bio-record.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/md/dm-bio-record.h')
-rw-r--r--drivers/md/dm-bio-record.h56
1 files changed, 56 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..745e3ab4a
--- /dev/null
+++ b/drivers/md/dm-bio-record.h
@@ -0,0 +1,56 @@
+/*
+ * 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>
+#include <linux/blk-integrity.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 block_device *bi_bdev;
+ 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_bdev = bio->bi_bdev;
+ 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_bdev = bd->bi_bdev;
+ 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