drivers/md/dm-bio-record.h

File Facts

System

Linux kernel

Corpus path

drivers/md/dm-bio-record.h

Extension

.h

Size

1497 bytes

Lines

58

Domain

Driver Families

Bucket

drivers/md

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bio.h
• linux/blk-integrity.h

Detected Declarations

• struct dm_bio_details
• function dm_bio_record
• function dm_bio_restore

Annotated Snippet

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

Annotation

• Immediate include surface: `linux/bio.h`, `linux/blk-integrity.h`.
• Detected declarations: `struct dm_bio_details`, `function dm_bio_record`, `function dm_bio_restore`.
• Atlas domain: Driver Families / drivers/md.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.