include/uapi/linux/blkdev.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/blkdev.h

Extension

.h

Size

369 bytes

Lines

15

Domain

Core OS

Bucket

Core Kernel Interface

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.

Dependency Surface

• linux/ioctl.h
• linux/types.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _UAPI_LINUX_BLKDEV_H
#define _UAPI_LINUX_BLKDEV_H

#include <linux/ioctl.h>
#include <linux/types.h>

/*
 * io_uring block file commands, see IORING_OP_URING_CMD.
 * It's a different number space from ioctl(), reuse the block's code 0x12.
 */
#define BLOCK_URING_CMD_DISCARD			_IO(0x12, 0)

#endif

Annotation

• Immediate include surface: `linux/ioctl.h`, `linux/types.h`.
• Atlas domain: Core OS / Core Kernel Interface.
• 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.