fs/xfs/xfs_bio_io.c

File Facts

System

Linux kernel

Corpus path

fs/xfs/xfs_bio_io.c

Extension

.c

Size

1111 bytes

Lines

54

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• xfs_platform.h

Detected Declarations

• function Copyright
• function xfs_rw_bdev

Annotated Snippet

if (!added) {
			struct bio	*prev = bio;

			bio = bio_alloc(prev->bi_bdev,
					bio_max_vecs(count - done),
					prev->bi_opf, GFP_KERNEL);
			bio->bi_iter.bi_sector = bio_end_sector(prev);
			bio_chain(prev, bio);
			submit_bio(prev);
		}
		done += added;
	} while (done < count);

	error = submit_bio_wait(bio);
	bio_put(bio);

	if (op == REQ_OP_READ)
		invalidate_kernel_vmap_range(data, count);
	return error;
}

Annotation

• Immediate include surface: `xfs_platform.h`.
• Detected declarations: `function Copyright`, `function xfs_rw_bdev`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source implementation candidate.

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.