include/uapi/linux/rds.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/rds.h

Extension

.h

Size

11168 bytes

Lines

422

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source 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.
• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• linux/socket.h
• linux/in6.h

Detected Declarations

• struct rds_info_counter
• struct rds_info_connection
• struct rds6_info_connection
• struct rds_info_message
• struct rds6_info_message
• struct rds_info_socket
• struct rds6_info_socket
• struct rds_info_tcp_socket
• struct rds6_info_tcp_socket
• struct rds_info_rdma_connection
• struct rds6_info_rdma_connection
• struct rds_rx_trace_so
• struct rds_cmsg_rx_trace
• struct rds_iovec
• struct rds_get_mr_args
• struct rds_get_mr_for_dest_args
• struct rds_free_mr_args
• struct rds_rdma_args
• struct rds_atomic_args
• struct rds_rdma_notify
• struct rds_zcopy_cookies
• enum rds_message_rxpath_latency

Annotated Snippet

struct rds_info_counter {
	__u8	name[32];
	__u64	value;
} __attribute__((packed));

#define RDS_INFO_CONNECTION_FLAG_SENDING	0x01
#define RDS_INFO_CONNECTION_FLAG_CONNECTING	0x02
#define RDS_INFO_CONNECTION_FLAG_CONNECTED	0x04

#define TRANSNAMSIZ	16

struct rds_info_connection {
	__u64		next_tx_seq;
	__u64		next_rx_seq;
	__be32		laddr;
	__be32		faddr;
	__u8		transport[TRANSNAMSIZ];		/* null term ascii */
	__u8		flags;
	__u8		tos;
} __attribute__((packed));

struct rds6_info_connection {
	__u64		next_tx_seq;
	__u64		next_rx_seq;
	struct in6_addr	laddr;
	struct in6_addr	faddr;
	__u8		transport[TRANSNAMSIZ];		/* null term ascii */
	__u8		flags;
} __attribute__((packed));

#define RDS_INFO_MESSAGE_FLAG_ACK               0x01
#define RDS_INFO_MESSAGE_FLAG_FAST_ACK          0x02

struct rds_info_message {
	__u64		seq;
	__u32		len;
	__be32		laddr;
	__be32		faddr;
	__be16		lport;
	__be16		fport;
	__u8		flags;
	__u8		tos;
} __attribute__((packed));

struct rds6_info_message {
	__u64	seq;
	__u32	len;
	struct in6_addr	laddr;
	struct in6_addr	faddr;
	__be16		lport;
	__be16		fport;
	__u8		flags;
	__u8		tos;
} __attribute__((packed));

struct rds_info_socket {
	__u32		sndbuf;
	__be32		bound_addr;
	__be32		connected_addr;
	__be16		bound_port;
	__be16		connected_port;
	__u32		rcvbuf;
	__u64		inum;
} __attribute__((packed));

struct rds6_info_socket {
	__u32		sndbuf;
	struct in6_addr	bound_addr;
	struct in6_addr	connected_addr;
	__be16		bound_port;
	__be16		connected_port;
	__u32		rcvbuf;
	__u64		inum;
} __attribute__((packed));

struct rds_info_tcp_socket {
	__be32          local_addr;
	__be16          local_port;
	__be32          peer_addr;
	__be16          peer_port;
	__u64           hdr_rem;
	__u64           data_rem;
	__u32           last_sent_nxt;
	__u32           last_expected_una;
	__u32           last_seen_una;
	__u8		tos;
} __attribute__((packed));

struct rds6_info_tcp_socket {
	struct in6_addr	local_addr;

Annotation

• Immediate include surface: `linux/types.h`, `linux/socket.h`, `linux/in6.h`.
• Detected declarations: `struct rds_info_counter`, `struct rds_info_connection`, `struct rds6_info_connection`, `struct rds_info_message`, `struct rds6_info_message`, `struct rds_info_socket`, `struct rds6_info_socket`, `struct rds_info_tcp_socket`, `struct rds6_info_tcp_socket`, `struct rds_info_rdma_connection`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source 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.