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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#ifndef _LINUX_RDS_H#define _LINUX_RDS_H
#include <linux/types.h>#include <linux/socket.h> /* For __kernel_sockaddr_storage. */#include <linux/in6.h> /* For struct in6_addr. */
#define RDS_IB_ABI_VERSION 0x301
#define SOL_RDS 276
/* * setsockopt/getsockopt for SOL_RDS */#define RDS_CANCEL_SENT_TO 1#define RDS_GET_MR 2#define RDS_FREE_MR 3/* deprecated: RDS_BARRIER 4 */#define RDS_RECVERR 5#define RDS_CONG_MONITOR 6#define RDS_GET_MR_FOR_DEST 7#define SO_RDS_TRANSPORT 8
/* Socket option to tap receive path latency * SO_RDS: SO_RDS_MSG_RXPATH_LATENCY * Format used struct rds_rx_trace_so */#define SO_RDS_MSG_RXPATH_LATENCY 10
/* supported values for SO_RDS_TRANSPORT */#define RDS_TRANS_IB 0#define RDS_TRANS_GAP 1#define RDS_TRANS_TCP 2#define RDS_TRANS_COUNT 3#define RDS_TRANS_NONE (~0)/* don't use RDS_TRANS_IWARP - it is deprecated */#define RDS_TRANS_IWARP RDS_TRANS_GAP
/* IOCTLS commands for SOL_RDS */#define SIOCRDSSETTOS (SIOCPROTOPRIVATE)#define SIOCRDSGETTOS (SIOCPROTOPRIVATE + 1)
typedef __u8 rds_tos_t;
/* * Control message types for SOL_RDS. * * CMSG_RDMA_ARGS (sendmsg) * Request a RDMA transfer to/from the specified * memory ranges. * The cmsg_data is a struct rds_rdma_args. * RDS_CMSG_RDMA_DEST (recvmsg, sendmsg) * Kernel informs application about intended * source/destination of a RDMA transfer * RDS_CMSG_RDMA_MAP (sendmsg) * Application asks kernel to map the given * memory range into a IB MR, and send the * R_Key along in an RDS extension header. * The cmsg_data is a struct rds_get_mr_args, * the same as for the GET_MR setsockopt. * RDS_CMSG_RDMA_STATUS (recvmsg) * Returns the status of a completed RDMA operation. * RDS_CMSG_RXPATH_LATENCY(recvmsg) * Returns rds message latencies in various stages of receive * path in nS. Its set per socket using SO_RDS_MSG_RXPATH_LATENCY * socket option. Legitimate points are defined in * enum rds_message_rxpath_latency. More points can be added in * future. CSMG format is struct rds_cmsg_rx_trace. */#define RDS_CMSG_RDMA_ARGS 1#define RDS_CMSG_RDMA_DEST 2#define RDS_CMSG_RDMA_MAP 3#define RDS_CMSG_RDMA_STATUS 4#define RDS_CMSG_CONG_UPDATE 5#define RDS_CMSG_ATOMIC_FADD 6#define RDS_CMSG_ATOMIC_CSWP 7#define RDS_CMSG_MASKED_ATOMIC_FADD 8#define RDS_CMSG_MASKED_ATOMIC_CSWP 9#define RDS_CMSG_RXPATH_LATENCY 11#define RDS_CMSG_ZCOPY_COOKIE 12#define RDS_CMSG_ZCOPY_COMPLETION 13
#define RDS_INFO_FIRST 10000#define RDS_INFO_COUNTERS 10000#define RDS_INFO_CONNECTIONS 10001/* 10002 aka RDS_INFO_FLOWS is deprecated */#define RDS_INFO_SEND_MESSAGES 10003#define RDS_INFO_RETRANS_MESSAGES 10004#define RDS_INFO_RECV_MESSAGES 10005#define RDS_INFO_SOCKETS 10006#define RDS_INFO_TCP_SOCKETS 10007#define RDS_INFO_IB_CONNECTIONS 10008#define RDS_INFO_CONNECTION_STATS 10009#define RDS_INFO_IWARP_CONNECTIONS 10010
/* PF_RDS6 options */#define RDS6_INFO_CONNECTIONS 10011#define RDS6_INFO_SEND_MESSAGES 10012#define RDS6_INFO_RETRANS_MESSAGES 10013#define RDS6_INFO_RECV_MESSAGES 10014#define RDS6_INFO_SOCKETS 10015#define RDS6_INFO_TCP_SOCKETS 10016#define RDS6_INFO_IB_CONNECTIONS 10017
#define RDS_INFO_LAST 10017
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; __be16 local_port; struct in6_addr peer_addr; __be16 peer_port; __u64 hdr_rem; __u64 data_rem; __u32 last_sent_nxt; __u32 last_expected_una; __u32 last_seen_una;} __attribute__((packed));
#define RDS_IB_GID_LEN 16struct rds_info_rdma_connection { __be32 src_addr; __be32 dst_addr; __u8 src_gid[RDS_IB_GID_LEN]; __u8 dst_gid[RDS_IB_GID_LEN];
__u32 max_send_wr; __u32 max_recv_wr; __u32 max_send_sge; __u32 rdma_mr_max; __u32 rdma_mr_size; __u8 tos; __u8 sl; __u32 cache_allocs;};
struct rds6_info_rdma_connection { struct in6_addr src_addr; struct in6_addr dst_addr; __u8 src_gid[RDS_IB_GID_LEN]; __u8 dst_gid[RDS_IB_GID_LEN];
__u32 max_send_wr; __u32 max_recv_wr; __u32 max_send_sge; __u32 rdma_mr_max; __u32 rdma_mr_size; __u8 tos; __u8 sl; __u32 cache_allocs;};
/* RDS message Receive Path Latency points */enum rds_message_rxpath_latency { RDS_MSG_RX_HDR_TO_DGRAM_START = 0, RDS_MSG_RX_DGRAM_REASSEMBLE, RDS_MSG_RX_DGRAM_DELIVERED, RDS_MSG_RX_DGRAM_TRACE_MAX};
struct rds_rx_trace_so { __u8 rx_traces; __u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];};
struct rds_cmsg_rx_trace { __u8 rx_traces; __u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX]; __u64 rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];};
/* * Congestion monitoring. * Congestion control in RDS happens at the host connection * level by exchanging a bitmap marking congested ports. * By default, a process sleeping in poll() is always woken * up when the congestion map is updated. * With explicit monitoring, an application can have more * fine-grained control. * The application installs a 64bit mask value in the socket, * where each bit corresponds to a group of ports. * When a congestion update arrives, RDS checks the set of * ports that are now uncongested against the list bit mask * installed in the socket, and if they overlap, we queue a * cong_notification on the socket. * * To install the congestion monitor bitmask, use RDS_CONG_MONITOR * with the 64bit mask. * Congestion updates are received via RDS_CMSG_CONG_UPDATE * control messages. * * The correspondence between bits and ports is * 1 << (portnum % 64) */#define RDS_CONG_MONITOR_SIZE 64#define RDS_CONG_MONITOR_BIT(port) (((unsigned int) port) % RDS_CONG_MONITOR_SIZE)#define RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port))
/* * RDMA related types */
/* * This encapsulates a remote memory location. * In the current implementation, it contains the R_Key * of the remote memory region, and the offset into it * (so that the application does not have to worry about * alignment). */typedef __u64 rds_rdma_cookie_t;
struct rds_iovec { __u64 addr; __u64 bytes;};
struct rds_get_mr_args { struct rds_iovec vec; __u64 cookie_addr; __u64 flags;};
struct rds_get_mr_for_dest_args { struct __kernel_sockaddr_storage dest_addr; struct rds_iovec vec; __u64 cookie_addr; __u64 flags;};
struct rds_free_mr_args { rds_rdma_cookie_t cookie; __u64 flags;};
struct rds_rdma_args { rds_rdma_cookie_t cookie; struct rds_iovec remote_vec; __u64 local_vec_addr; __u64 nr_local; __u64 flags; __u64 user_token;};
struct rds_atomic_args { rds_rdma_cookie_t cookie; __u64 local_addr; __u64 remote_addr; union { struct { __u64 compare; __u64 swap; } cswp; struct { __u64 add; } fadd; struct { __u64 compare; __u64 swap; __u64 compare_mask; __u64 swap_mask; } m_cswp; struct { __u64 add; __u64 nocarry_mask; } m_fadd; }; __u64 flags; __u64 user_token;};
struct rds_rdma_notify { __u64 user_token; __s32 status;};
#define RDS_RDMA_SUCCESS 0#define RDS_RDMA_REMOTE_ERROR 1#define RDS_RDMA_CANCELED 2#define RDS_RDMA_DROPPED 3#define RDS_RDMA_OTHER_ERROR 4
#define RDS_MAX_ZCOOKIES 8struct rds_zcopy_cookies { __u32 num; __u32 cookies[RDS_MAX_ZCOOKIES];};
/* * Common set of flags for all RDMA related structs */#define RDS_RDMA_READWRITE 0x0001#define RDS_RDMA_FENCE 0x0002 /* use FENCE for immediate send */#define RDS_RDMA_INVALIDATE 0x0004 /* invalidate R_Key after freeing MR */#define RDS_RDMA_USE_ONCE 0x0008 /* free MR after use */#define RDS_RDMA_DONTWAIT 0x0010 /* Don't wait in SET_BARRIER */#define RDS_RDMA_NOTIFY_ME 0x0020 /* Notify when operation completes */#define RDS_RDMA_SILENT 0x0040 /* Do not interrupt remote */
#endif /* IB_RDS_H */