fs/proc/fd.h

File Facts

System

Linux kernel

Corpus path

fs/proc/fd.h

Extension

.h

Size

573 bytes

Lines

22

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/fs.h

Detected Declarations

• function proc_fd

Annotated Snippet

extern const struct file_operations proc_fd_operations;
extern const struct inode_operations proc_fd_inode_operations;

extern const struct file_operations proc_fdinfo_operations;
extern const struct inode_operations proc_fdinfo_inode_operations;

extern int proc_fd_permission(struct mnt_idmap *idmap,
			      struct inode *inode, int mask);

static inline unsigned int proc_fd(struct inode *inode)
{
	return PROC_I(inode)->fd;
}

#endif /* __PROCFS_FD_H__ */

Annotation

• Immediate include surface: `linux/fs.h`.
• Detected declarations: `function proc_fd`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: pattern 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.