fs/proc_namespace.c

File Facts

System

Linux kernel

Corpus path

fs/proc_namespace.c

Extension

.c

Size

7957 bytes

Lines

338

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/mnt_namespace.h
• linux/nsproxy.h
• linux/security.h
• linux/fs_struct.h
• linux/sched/task.h
• proc/internal.h
• pnode.h
• internal.h

Detected Declarations

• struct proc_fs_opts
• function mounts_poll
• function show_sb_opts
• function show_vfsmnt_opts
• function mangle
• function show_type
• function show_vfsmnt
• function show_mountinfo
• function show_vfsstat
• function mounts_open_common
• function mounts_release
• function mounts_open
• function mountinfo_open
• function mountstats_open

Annotated Snippet

const struct file_operations proc_mounts_operations = {
	.open		= mounts_open,
	.read_iter	= seq_read_iter,
	.splice_read	= copy_splice_read,
	.llseek		= seq_lseek,
	.release	= mounts_release,
	.poll		= mounts_poll,
};

const struct file_operations proc_mountinfo_operations = {
	.open		= mountinfo_open,
	.read_iter	= seq_read_iter,
	.splice_read	= copy_splice_read,
	.llseek		= seq_lseek,
	.release	= mounts_release,
	.poll		= mounts_poll,
};

const struct file_operations proc_mountstats_operations = {
	.open		= mountstats_open,
	.read_iter	= seq_read_iter,
	.splice_read	= copy_splice_read,
	.llseek		= seq_lseek,
	.release	= mounts_release,
};

Annotation

• Immediate include surface: `linux/mnt_namespace.h`, `linux/nsproxy.h`, `linux/security.h`, `linux/fs_struct.h`, `linux/sched/task.h`, `proc/internal.h`, `pnode.h`, `internal.h`.
• Detected declarations: `struct proc_fs_opts`, `function mounts_poll`, `function show_sb_opts`, `function show_vfsmnt_opts`, `function mangle`, `function show_type`, `function show_vfsmnt`, `function show_mountinfo`, `function show_vfsstat`, `function mounts_open_common`.
• 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.