net/atm/pppoatm.c

File Facts

System

Linux kernel

Corpus path

net/atm/pppoatm.c

Extension

.c

Size

15292 bytes

Lines

491

Domain

Networking Core

Bucket

Sockets, Protocols, Packet Path, And Network Policy

Inferred role

Networking Core: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

• Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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

• linux/module.h
• linux/init.h
• linux/interrupt.h
• linux/skbuff.h
• linux/slab.h
• linux/atm.h
• linux/atmdev.h
• linux/capability.h
• linux/ppp_defs.h
• linux/ppp-ioctl.h
• linux/ppp_channel.h
• linux/atmppp.h
• common.h

Detected Declarations

• struct pppoatm_vcc
• enum pppoatm_encaps
• function pppoatm_wakeup_sender
• function pppoatm_release_cb
• function pppoatm_pop
• function pppoatm_unassign_vcc
• function pppoatm_push
• function pppoatm_may_send
• function ppp_output_wakeup
• function pppoatm_devppp_ioctl
• function pppoatm_assign_vcc
• function pppoatm_ioctl
• function pppoatm_init
• function pppoatm_exit
• module init pppoatm_init

Annotated Snippet

module_init(pppoatm_init);
module_exit(pppoatm_exit);

MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>");
MODULE_DESCRIPTION("RFC2364 PPP over ATM/AAL5");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/interrupt.h`, `linux/skbuff.h`, `linux/slab.h`, `linux/atm.h`, `linux/atmdev.h`, `linux/capability.h`.
• Detected declarations: `struct pppoatm_vcc`, `enum pppoatm_encaps`, `function pppoatm_wakeup_sender`, `function pppoatm_release_cb`, `function pppoatm_pop`, `function pppoatm_unassign_vcc`, `function pppoatm_push`, `function pppoatm_may_send`, `function ppp_output_wakeup`, `function pppoatm_devppp_ioctl`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.