ipc/ipc_sysctl.c

File Facts

System

Linux kernel

Corpus path

ipc/ipc_sysctl.c

Extension

.c

Size

8265 bytes

Lines

335

Domain

Core OS

Bucket

IPC

Inferred role

Core OS: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/ipc.h
• linux/nsproxy.h
• linux/sysctl.h
• linux/uaccess.h
• linux/capability.h
• linux/ipc_namespace.h
• linux/msg.h
• linux/slab.h
• linux/cred.h
• util.h

Detected Declarations

• function Copyright
• function proc_ipc_auto_msgmni
• function proc_ipc_sem_dointvec
• function set_is_seen
• function ipc_set_ownership
• function ipc_permissions
• function setup_ipc_sysctls
• function retire_ipc_sysctls
• function ipc_sysctl_init
• function ipc_mni_extend
• module init ipc_sysctl_init

Annotated Snippet

device_initcall(ipc_sysctl_init);

static int __init ipc_mni_extend(char *str)
{
	ipc_mni = IPCMNI_EXTEND;
	ipc_mni_shift = IPCMNI_EXTEND_SHIFT;
	ipc_min_cycle = IPCMNI_EXTEND_MIN_CYCLE;
	pr_info("IPCMNI extended to %d.\n", ipc_mni);
	return 0;
}
early_param("ipcmni_extend", ipc_mni_extend);

Annotation

• Immediate include surface: `linux/module.h`, `linux/ipc.h`, `linux/nsproxy.h`, `linux/sysctl.h`, `linux/uaccess.h`, `linux/capability.h`, `linux/ipc_namespace.h`, `linux/msg.h`.
• Detected declarations: `function Copyright`, `function proc_ipc_auto_msgmni`, `function proc_ipc_sem_dointvec`, `function set_is_seen`, `function ipc_set_ownership`, `function ipc_permissions`, `function setup_ipc_sysctls`, `function retire_ipc_sysctls`, `function ipc_sysctl_init`, `function ipc_mni_extend`.
• Atlas domain: Core OS / IPC.
• Implementation status: integration 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.