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7005ada68d
SMC code uses the base gid for VLAN traffic. The gids exchanged in the CLC handshake and the gid index used for the QP have to switch from the base gid to the appropriate vlan gid. When searching for a matching IB device port for a certain vlan device, it does not make sense to return an IB device port, which is not enabled for the used vlan_id. Add another check whether a vlan gid exists for a certain IB device port. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
187 lines
6.1 KiB
C
187 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* CLC (connection layer control) handshake over initial TCP socket to
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* prepare for RDMA traffic
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*
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* Copyright IBM Corp. 2016
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*
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* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
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*/
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#ifndef _SMC_CLC_H
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#define _SMC_CLC_H
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#include <rdma/ib_verbs.h>
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#include "smc.h"
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#define SMC_CLC_PROPOSAL 0x01
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#define SMC_CLC_ACCEPT 0x02
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#define SMC_CLC_CONFIRM 0x03
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#define SMC_CLC_DECLINE 0x04
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#define SMC_CLC_V1 0x1 /* SMC version */
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#define SMC_TYPE_R 0 /* SMC-R only */
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#define SMC_TYPE_D 1 /* SMC-D only */
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#define SMC_TYPE_B 3 /* SMC-R and SMC-D */
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#define CLC_WAIT_TIME (6 * HZ) /* max. wait time on clcsock */
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#define SMC_CLC_DECL_MEM 0x01010000 /* insufficient memory resources */
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#define SMC_CLC_DECL_TIMEOUT 0x02000000 /* timeout */
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#define SMC_CLC_DECL_CNFERR 0x03000000 /* configuration error */
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#define SMC_CLC_DECL_IPSEC 0x03030000 /* IPsec usage */
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#define SMC_CLC_DECL_SYNCERR 0x04000000 /* synchronization error */
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#define SMC_CLC_DECL_REPLY 0x06000000 /* reply to a received decline */
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#define SMC_CLC_DECL_INTERR 0x99990000 /* internal error */
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#define SMC_CLC_DECL_TCL 0x02040000 /* timeout w4 QP confirm */
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#define SMC_CLC_DECL_SEND 0x07000000 /* sending problem */
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#define SMC_CLC_DECL_RMBE_EC 0x08000000 /* peer has eyecatcher in RMBE */
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struct smc_clc_msg_hdr { /* header1 of clc messages */
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u8 eyecatcher[4]; /* eye catcher */
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u8 type; /* proposal / accept / confirm / decline */
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__be16 length;
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#if defined(__BIG_ENDIAN_BITFIELD)
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u8 version : 4,
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flag : 1,
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rsvd : 1,
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path : 2;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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u8 path : 2,
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rsvd : 1,
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flag : 1,
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version : 4;
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#endif
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} __packed; /* format defined in RFC7609 */
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struct smc_clc_msg_trail { /* trailer of clc messages */
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u8 eyecatcher[4];
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};
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struct smc_clc_msg_local { /* header2 of clc messages */
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u8 id_for_peer[SMC_SYSTEMID_LEN]; /* unique system id */
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u8 gid[16]; /* gid of ib_device port */
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u8 mac[6]; /* mac of ib_device port */
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};
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#define SMC_CLC_MAX_V6_PREFIX 8
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/* Struct would be 4 byte aligned, but it is used in an array that is sent
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* to peers and must conform to RFC7609, hence we need to use packed here.
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*/
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struct smc_clc_ipv6_prefix {
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struct in6_addr prefix;
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u8 prefix_len;
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} __packed; /* format defined in RFC7609 */
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struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/
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__be32 outgoing_subnet; /* subnet mask */
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u8 prefix_len; /* number of significant bits in mask */
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u8 reserved[2];
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u8 ipv6_prefixes_cnt; /* number of IPv6 prefixes in prefix array */
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} __aligned(4);
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struct smc_clc_msg_smcd { /* SMC-D GID information */
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u64 gid; /* ISM GID of requestor */
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u8 res[32];
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};
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struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */
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struct smc_clc_msg_hdr hdr;
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struct smc_clc_msg_local lcl;
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__be16 iparea_offset; /* offset to IP address information area */
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} __aligned(4);
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#define SMC_CLC_PROPOSAL_MAX_OFFSET 0x28
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#define SMC_CLC_PROPOSAL_MAX_PREFIX (SMC_CLC_MAX_V6_PREFIX * \
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sizeof(struct smc_clc_ipv6_prefix))
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#define SMC_CLC_MAX_LEN (sizeof(struct smc_clc_msg_proposal) + \
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SMC_CLC_PROPOSAL_MAX_OFFSET + \
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sizeof(struct smc_clc_msg_proposal_prefix) + \
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SMC_CLC_PROPOSAL_MAX_PREFIX + \
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sizeof(struct smc_clc_msg_trail))
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struct smc_clc_msg_accept_confirm { /* clc accept / confirm message */
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struct smc_clc_msg_hdr hdr;
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union {
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struct { /* SMC-R */
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struct smc_clc_msg_local lcl;
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u8 qpn[3]; /* QP number */
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__be32 rmb_rkey; /* RMB rkey */
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u8 rmbe_idx; /* Index of RMBE in RMB */
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__be32 rmbe_alert_token;/* unique connection id */
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#if defined(__BIG_ENDIAN_BITFIELD)
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u8 rmbe_size : 4, /* buf size (compressed) */
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qp_mtu : 4; /* QP mtu */
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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u8 qp_mtu : 4,
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rmbe_size : 4;
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#endif
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u8 reserved;
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__be64 rmb_dma_addr; /* RMB virtual address */
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u8 reserved2;
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u8 psn[3]; /* packet sequence number */
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struct smc_clc_msg_trail smcr_trl;
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/* eye catcher "SMCR" EBCDIC */
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} __packed;
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struct { /* SMC-D */
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u64 gid; /* Sender GID */
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u64 token; /* DMB token */
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u8 dmbe_idx; /* DMBE index */
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#if defined(__BIG_ENDIAN_BITFIELD)
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u8 dmbe_size : 4, /* buf size (compressed) */
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reserved3 : 4;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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u8 reserved3 : 4,
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dmbe_size : 4;
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#endif
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u16 reserved4;
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u32 linkid; /* Link identifier */
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u32 reserved5[3];
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struct smc_clc_msg_trail smcd_trl;
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/* eye catcher "SMCD" EBCDIC */
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} __packed;
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};
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} __packed; /* format defined in RFC7609 */
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struct smc_clc_msg_decline { /* clc decline message */
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struct smc_clc_msg_hdr hdr;
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u8 id_for_peer[SMC_SYSTEMID_LEN]; /* sender peer_id */
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__be32 peer_diagnosis; /* diagnosis information */
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u8 reserved2[4];
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struct smc_clc_msg_trail trl; /* eye catcher "SMCR" EBCDIC */
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} __aligned(4);
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/* determine start of the prefix area within the proposal message */
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static inline struct smc_clc_msg_proposal_prefix *
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smc_clc_proposal_get_prefix(struct smc_clc_msg_proposal *pclc)
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{
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return (struct smc_clc_msg_proposal_prefix *)
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((u8 *)pclc + sizeof(*pclc) + ntohs(pclc->iparea_offset));
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}
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/* get SMC-D info from proposal message */
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static inline struct smc_clc_msg_smcd *
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smc_get_clc_msg_smcd(struct smc_clc_msg_proposal *prop)
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{
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if (ntohs(prop->iparea_offset) != sizeof(struct smc_clc_msg_smcd))
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return NULL;
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return (struct smc_clc_msg_smcd *)(prop + 1);
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}
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struct smcd_dev;
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int smc_clc_prfx_match(struct socket *clcsock,
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struct smc_clc_msg_proposal_prefix *prop);
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int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
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u8 expected_type);
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int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info);
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int smc_clc_send_proposal(struct smc_sock *smc, int smc_type,
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struct smc_ib_device *smcibdev, u8 ibport, u8 gid[],
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struct smcd_dev *ismdev);
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int smc_clc_send_confirm(struct smc_sock *smc);
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int smc_clc_send_accept(struct smc_sock *smc, int srv_first_contact);
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#endif
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