net/9p/trans_rdma.c

File Facts

System

Linux kernel

Corpus path

net/9p/trans_rdma.c

Extension

.c

Size

17322 bytes

Lines

685

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/kthread.h
• linux/errno.h
• linux/kernel.h
• linux/un.h
• linux/uaccess.h
• linux/inet.h
• linux/file.h
• linux/fs_context.h
• linux/semaphore.h
• linux/slab.h
• linux/seq_file.h
• net/9p/9p.h
• net/9p/client.h
• net/9p/transport.h
• rdma/ib_verbs.h
• rdma/rdma_cm.h

Detected Declarations

• struct p9_trans_rdma
• struct p9_rdma_req
• struct p9_rdma_context
• function p9_rdma_show_options
• function p9_cm_event_handler
• function recv_done
• function send_done
• function qp_event_handler
• function rdma_destroy_trans
• function post_recv
• function rdma_request
• function post_recv
• function rdma_close
• function rdma_cancel
• function rdma_cancelled
• function p9_rdma_bind_privport
• function rdma_create_trans
• function p9_trans_rdma_init
• function p9_trans_rdma_exit
• module init p9_trans_rdma_init

Annotated Snippet

module_init(p9_trans_rdma_init);
module_exit(p9_trans_rdma_exit);
MODULE_ALIAS_9P("rdma");

MODULE_AUTHOR("Tom Tucker <tom@opengridcomputing.com>");
MODULE_DESCRIPTION("RDMA Transport for 9P");
MODULE_LICENSE("Dual BSD/GPL");

Annotation

• Immediate include surface: `linux/in.h`, `linux/module.h`, `linux/net.h`, `linux/ipv6.h`, `linux/kthread.h`, `linux/errno.h`, `linux/kernel.h`, `linux/un.h`.
• Detected declarations: `struct p9_trans_rdma`, `struct p9_rdma_req`, `struct p9_rdma_context`, `function p9_rdma_show_options`, `function p9_cm_event_handler`, `function recv_done`, `function send_done`, `function qp_event_handler`, `function rdma_destroy_trans`, `function post_recv`.
• 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.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.