/* SPDX-License-Identifier: GPL-2.0 */ /* * Shared Memory Communications over RDMA (SMC-R) and RoCE * * CLC (connection layer control) handshake over initial TCP socket to * prepare for RDMA traffic * * Copyright IBM Corp. 2016 * * Author(s): Ursula Braun <[email protected]> */ #ifndef _SMC_CLC_H #define _SMC_CLC_H #include <rdma/ib_verbs.h> #include <linux/smc.h> #include "smc.h" #include "smc_netlink.h" #define SMC_CLC_PROPOSAL … #define SMC_CLC_ACCEPT … #define SMC_CLC_CONFIRM … #define SMC_CLC_DECLINE … #define SMC_TYPE_R … #define SMC_TYPE_D … #define SMC_TYPE_N … #define SMC_TYPE_B … #define CLC_WAIT_TIME … #define CLC_WAIT_TIME_SHORT … #define SMC_CLC_DECL_MEM … #define SMC_CLC_DECL_TIMEOUT_CL … #define SMC_CLC_DECL_TIMEOUT_AL … #define SMC_CLC_DECL_CNFERR … #define SMC_CLC_DECL_PEERNOSMC … #define SMC_CLC_DECL_IPSEC … #define SMC_CLC_DECL_NOSMCDEV … #define SMC_CLC_DECL_NOSMCDDEV … #define SMC_CLC_DECL_NOSMCRDEV … #define SMC_CLC_DECL_NOISM2SUPP … #define SMC_CLC_DECL_NOV2EXT … #define SMC_CLC_DECL_NOV2DEXT … #define SMC_CLC_DECL_NOSEID … #define SMC_CLC_DECL_NOSMCD2DEV … #define SMC_CLC_DECL_NOUEID … #define SMC_CLC_DECL_RELEASEERR … #define SMC_CLC_DECL_MAXCONNERR … #define SMC_CLC_DECL_MAXLINKERR … #define SMC_CLC_DECL_MODEUNSUPP … #define SMC_CLC_DECL_RMBE_EC … #define SMC_CLC_DECL_OPTUNSUPP … #define SMC_CLC_DECL_DIFFPREFIX … #define SMC_CLC_DECL_GETVLANERR … #define SMC_CLC_DECL_ISMVLANERR … #define SMC_CLC_DECL_NOACTLINK … #define SMC_CLC_DECL_NOSRVLINK … #define SMC_CLC_DECL_VERSMISMAT … #define SMC_CLC_DECL_MAX_DMB … #define SMC_CLC_DECL_NOROUTE … #define SMC_CLC_DECL_NOINDIRECT … #define SMC_CLC_DECL_SYNCERR … #define SMC_CLC_DECL_PEERDECL … #define SMC_CLC_DECL_INTERR … #define SMC_CLC_DECL_ERR_RTOK … #define SMC_CLC_DECL_ERR_RDYLNK … #define SMC_CLC_DECL_ERR_REGBUF … #define SMC_FIRST_CONTACT_MASK … struct smc_clc_msg_hdr { … } __packed; /* format defined in RFC7609 */ struct smc_clc_msg_trail { … }; struct smc_clc_msg_local { … }; /* Struct would be 4 byte aligned, but it is used in an array that is sent * to peers and must conform to RFC7609, hence we need to use packed here. */ struct smc_clc_ipv6_prefix { … } __packed; /* format defined in RFC7609 */ #if defined(__BIG_ENDIAN_BITFIELD) struct smc_clc_v2_flag { u8 release : 4, rsvd : 3, seid : 1; }; #elif defined(__LITTLE_ENDIAN_BITFIELD) struct smc_clc_v2_flag { … }; #endif struct smc_clnt_opts_area_hdr { … }; struct smc_clc_smcd_gid_chid { … } __packed; /* format defined in * IBM Shared Memory Communications Version 2 * (https://www.ibm.com/support/pages/node/6326337) */ struct smc_clc_v2_extension { … }; struct smc_clc_msg_proposal_prefix { … } __aligned(…); struct smc_clc_msg_smcd { … }; struct smc_clc_smcd_v2_extension { … }; struct smc_clc_msg_proposal { … } __aligned(…); #define SMC_CLC_MAX_V6_PREFIX … #define SMC_CLC_MAX_UEID … #define SMCD_CLC_MAX_V2_GID_ENTRIES … struct smc_clc_msg_proposal_area { … }; struct smcr_clc_msg_accept_confirm { … } __packed; struct smcd_clc_msg_accept_confirm_common { … } __packed; #define SMC_CLC_OS_ZOS … #define SMC_CLC_OS_LINUX … #define SMC_CLC_OS_AIX … struct smc_clc_first_contact_ext { … }; struct smc_clc_first_contact_ext_v2x { … } __packed; /* format defined in * IBM Shared Memory Communications Version 2 (Third Edition) * (https://www.ibm.com/support/pages/node/7009315) */ struct smc_clc_fce_gid_ext { … }; struct smc_clc_msg_accept_confirm { … }; struct smc_clc_msg_decline { … } __aligned(…); #define SMC_DECL_DIAG_COUNT_V2 … struct smc_clc_msg_decline_v2 { … } __aligned(…); /* determine start of the prefix area within the proposal message */ static inline struct smc_clc_msg_proposal_prefix * smc_clc_proposal_get_prefix(struct smc_clc_msg_proposal *pclc) { … } static inline bool smcr_indicated(int smc_type) { … } static inline bool smcd_indicated(int smc_type) { … } static inline u8 smc_indicated_type(int is_smcd, int is_smcr) { … } /* get SMC-D info from proposal message */ static inline struct smc_clc_msg_smcd * smc_get_clc_msg_smcd(struct smc_clc_msg_proposal *prop) { … } static inline struct smc_clc_v2_extension * smc_get_clc_v2_ext(struct smc_clc_msg_proposal *prop) { … } static inline struct smc_clc_smcd_v2_extension * smc_get_clc_smcd_v2_ext(struct smc_clc_v2_extension *prop_v2ext) { … } static inline struct smc_clc_first_contact_ext * smc_get_clc_first_contact_ext(struct smc_clc_msg_accept_confirm *clc, bool is_smcd) { … } struct smcd_dev; struct smc_init_info; int smc_clc_prfx_match(struct socket *clcsock, struct smc_clc_msg_proposal_prefix *prop); int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen, u8 expected_type, unsigned long timeout); int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info, u8 version); int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini); int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact, u8 version, u8 *eid, struct smc_init_info *ini); int smc_clc_send_accept(struct smc_sock *smc, bool srv_first_contact, u8 version, u8 *negotiated_eid, struct smc_init_info *ini); int smc_clc_srv_v2x_features_validate(struct smc_sock *smc, struct smc_clc_msg_proposal *pclc, struct smc_init_info *ini); int smc_clc_clnt_v2x_features_validate(struct smc_clc_first_contact_ext *fce, struct smc_init_info *ini); int smc_clc_v2x_features_confirm_check(struct smc_clc_msg_accept_confirm *cclc, struct smc_init_info *ini); void smc_clc_init(void) __init; void smc_clc_exit(void); void smc_clc_get_hostname(u8 **host); bool smc_clc_match_eid(u8 *negotiated_eid, struct smc_clc_v2_extension *smc_v2_ext, u8 *peer_eid, u8 *local_eid); int smc_clc_ueid_count(void); int smc_nl_dump_ueid(struct sk_buff *skb, struct netlink_callback *cb); int smc_nl_add_ueid(struct sk_buff *skb, struct genl_info *info); int smc_nl_remove_ueid(struct sk_buff *skb, struct genl_info *info); int smc_nl_flush_ueid(struct sk_buff *skb, struct genl_info *info); int smc_nl_dump_seid(struct sk_buff *skb, struct netlink_callback *cb); int smc_nl_enable_seid(struct sk_buff *skb, struct genl_info *info); int smc_nl_disable_seid(struct sk_buff *skb, struct genl_info *info); #endif
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