net/9p/trans_virtio.c

File Facts

System

Linux kernel

Corpus path

net/9p/trans_virtio.c

Extension

.c

Size

21356 bytes

Lines

843

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.
• 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/in.h
• linux/module.h
• linux/net.h
• linux/ipv6.h
• linux/errno.h
• linux/kernel.h
• linux/un.h
• linux/uaccess.h
• linux/inet.h
• linux/file.h
• linux/highmem.h
• linux/slab.h
• net/9p/9p.h
• linux/fs_context.h
• net/9p/client.h
• net/9p/transport.h
• linux/scatterlist.h
• linux/swap.h
• linux/virtio.h
• linux/virtio_9p.h
• trans_common.h

Detected Declarations

• struct virtio_chan
• function rest_of_page
• function p9_virtio_close
• function req_done
• function pack_sg_list
• function p9_virtio_cancel
• function p9_virtio_cancelled
• function pack_sg_list_p
• function p9_virtio_request
• function p9_get_mapped_pages
• function handle_rerror
• function p9_virtio_zc_request
• function p9_mount_tag_show
• function p9_virtio_probe
• function p9_virtio_create
• function p9_virtio_remove
• function p9_virtio_init
• function p9_virtio_cleanup
• module init p9_virtio_init

Annotated Snippet

module_init(p9_virtio_init);
module_exit(p9_virtio_cleanup);
MODULE_ALIAS_9P("virtio");

MODULE_DEVICE_TABLE(virtio, id_table);
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
MODULE_DESCRIPTION("Virtio 9p Transport");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/in.h`, `linux/module.h`, `linux/net.h`, `linux/ipv6.h`, `linux/errno.h`, `linux/kernel.h`, `linux/un.h`, `linux/uaccess.h`.
• Detected declarations: `struct virtio_chan`, `function rest_of_page`, `function p9_virtio_close`, `function req_done`, `function pack_sg_list`, `function p9_virtio_cancel`, `function p9_virtio_cancelled`, `function pack_sg_list_p`, `function p9_virtio_request`, `function p9_get_mapped_pages`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration implementation candidate.
• 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.