mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Karsten Graul](/assets/img/avatar_default.png)
The CLC decline message changed with SMC-Rv2 and supports up to 4 additional diagnosis codes. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
401 lines
13 KiB
C
401 lines
13 KiB
C
/* 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 <ubraun@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#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 0x01
|
|
#define SMC_CLC_ACCEPT 0x02
|
|
#define SMC_CLC_CONFIRM 0x03
|
|
#define SMC_CLC_DECLINE 0x04
|
|
|
|
#define SMC_TYPE_R 0 /* SMC-R only */
|
|
#define SMC_TYPE_D 1 /* SMC-D only */
|
|
#define SMC_TYPE_N 2 /* neither SMC-R nor SMC-D */
|
|
#define SMC_TYPE_B 3 /* SMC-R and SMC-D */
|
|
#define CLC_WAIT_TIME (6 * HZ) /* max. wait time on clcsock */
|
|
#define CLC_WAIT_TIME_SHORT HZ /* short wait time on clcsock */
|
|
#define SMC_CLC_DECL_MEM 0x01010000 /* insufficient memory resources */
|
|
#define SMC_CLC_DECL_TIMEOUT_CL 0x02010000 /* timeout w4 QP confirm link */
|
|
#define SMC_CLC_DECL_TIMEOUT_AL 0x02020000 /* timeout w4 QP add link */
|
|
#define SMC_CLC_DECL_CNFERR 0x03000000 /* configuration error */
|
|
#define SMC_CLC_DECL_PEERNOSMC 0x03010000 /* peer did not indicate SMC */
|
|
#define SMC_CLC_DECL_IPSEC 0x03020000 /* IPsec usage */
|
|
#define SMC_CLC_DECL_NOSMCDEV 0x03030000 /* no SMC device found (R or D) */
|
|
#define SMC_CLC_DECL_NOSMCDDEV 0x03030001 /* no SMC-D device found */
|
|
#define SMC_CLC_DECL_NOSMCRDEV 0x03030002 /* no SMC-R device found */
|
|
#define SMC_CLC_DECL_NOISM2SUPP 0x03030003 /* hardware has no ISMv2 support */
|
|
#define SMC_CLC_DECL_NOV2EXT 0x03030004 /* peer sent no clc v2 extension */
|
|
#define SMC_CLC_DECL_NOV2DEXT 0x03030005 /* peer sent no clc SMC-Dv2 ext. */
|
|
#define SMC_CLC_DECL_NOSEID 0x03030006 /* peer sent no SEID */
|
|
#define SMC_CLC_DECL_NOSMCD2DEV 0x03030007 /* no SMC-Dv2 device found */
|
|
#define SMC_CLC_DECL_NOUEID 0x03030008 /* peer sent no UEID */
|
|
#define SMC_CLC_DECL_MODEUNSUPP 0x03040000 /* smc modes do not match (R or D)*/
|
|
#define SMC_CLC_DECL_RMBE_EC 0x03050000 /* peer has eyecatcher in RMBE */
|
|
#define SMC_CLC_DECL_OPTUNSUPP 0x03060000 /* fastopen sockopt not supported */
|
|
#define SMC_CLC_DECL_DIFFPREFIX 0x03070000 /* IP prefix / subnet mismatch */
|
|
#define SMC_CLC_DECL_GETVLANERR 0x03080000 /* err to get vlan id of ip device*/
|
|
#define SMC_CLC_DECL_ISMVLANERR 0x03090000 /* err to reg vlan id on ism dev */
|
|
#define SMC_CLC_DECL_NOACTLINK 0x030a0000 /* no active smc-r link in lgr */
|
|
#define SMC_CLC_DECL_NOSRVLINK 0x030b0000 /* SMC-R link from srv not found */
|
|
#define SMC_CLC_DECL_VERSMISMAT 0x030c0000 /* SMC version mismatch */
|
|
#define SMC_CLC_DECL_MAX_DMB 0x030d0000 /* SMC-D DMB limit exceeded */
|
|
#define SMC_CLC_DECL_NOROUTE 0x030e0000 /* SMC-Rv2 conn. no route to peer */
|
|
#define SMC_CLC_DECL_NOINDIRECT 0x030f0000 /* SMC-Rv2 conn. indirect mismatch*/
|
|
#define SMC_CLC_DECL_SYNCERR 0x04000000 /* synchronization error */
|
|
#define SMC_CLC_DECL_PEERDECL 0x05000000 /* peer declined during handshake */
|
|
#define SMC_CLC_DECL_INTERR 0x09990000 /* internal error */
|
|
#define SMC_CLC_DECL_ERR_RTOK 0x09990001 /* rtoken handling failed */
|
|
#define SMC_CLC_DECL_ERR_RDYLNK 0x09990002 /* ib ready link failed */
|
|
#define SMC_CLC_DECL_ERR_REGRMB 0x09990003 /* reg rmb failed */
|
|
|
|
#define SMC_FIRST_CONTACT_MASK 0b10 /* first contact bit within typev2 */
|
|
|
|
struct smc_clc_msg_hdr { /* header1 of clc messages */
|
|
u8 eyecatcher[4]; /* eye catcher */
|
|
u8 type; /* proposal / accept / confirm / decline */
|
|
__be16 length;
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
u8 version : 4,
|
|
typev2 : 2,
|
|
typev1 : 2;
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u8 typev1 : 2,
|
|
typev2 : 2,
|
|
version : 4;
|
|
#endif
|
|
} __packed; /* format defined in RFC7609 */
|
|
|
|
struct smc_clc_msg_trail { /* trailer of clc messages */
|
|
u8 eyecatcher[4];
|
|
};
|
|
|
|
struct smc_clc_msg_local { /* header2 of clc messages */
|
|
u8 id_for_peer[SMC_SYSTEMID_LEN]; /* unique system id */
|
|
u8 gid[16]; /* gid of ib_device port */
|
|
u8 mac[6]; /* mac of ib_device port */
|
|
};
|
|
|
|
/* 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 {
|
|
struct in6_addr prefix;
|
|
u8 prefix_len;
|
|
} __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 {
|
|
u8 seid : 1,
|
|
rsvd : 3,
|
|
release : 4;
|
|
};
|
|
#endif
|
|
|
|
struct smc_clnt_opts_area_hdr {
|
|
u8 eid_cnt; /* number of user defined EIDs */
|
|
u8 ism_gid_cnt; /* number of ISMv2 GIDs */
|
|
u8 reserved1;
|
|
struct smc_clc_v2_flag flag;
|
|
u8 reserved2[2];
|
|
__be16 smcd_v2_ext_offset; /* SMC-Dv2 Extension Offset */
|
|
};
|
|
|
|
struct smc_clc_smcd_gid_chid {
|
|
__be64 gid; /* ISM GID */
|
|
__be16 chid; /* ISMv2 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_clnt_opts_area_hdr hdr;
|
|
u8 roce[16]; /* RoCEv2 GID */
|
|
u8 reserved[16];
|
|
u8 user_eids[][SMC_MAX_EID_LEN];
|
|
};
|
|
|
|
struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/
|
|
__be32 outgoing_subnet; /* subnet mask */
|
|
u8 prefix_len; /* number of significant bits in mask */
|
|
u8 reserved[2];
|
|
u8 ipv6_prefixes_cnt; /* number of IPv6 prefixes in prefix array */
|
|
} __aligned(4);
|
|
|
|
struct smc_clc_msg_smcd { /* SMC-D GID information */
|
|
struct smc_clc_smcd_gid_chid ism; /* ISM native GID+CHID of requestor */
|
|
__be16 v2_ext_offset; /* SMC Version 2 Extension Offset */
|
|
u8 reserved[28];
|
|
};
|
|
|
|
struct smc_clc_smcd_v2_extension {
|
|
u8 system_eid[SMC_MAX_EID_LEN];
|
|
u8 reserved[16];
|
|
struct smc_clc_smcd_gid_chid gidchid[];
|
|
};
|
|
|
|
struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */
|
|
struct smc_clc_msg_hdr hdr;
|
|
struct smc_clc_msg_local lcl;
|
|
__be16 iparea_offset; /* offset to IP address information area */
|
|
} __aligned(4);
|
|
|
|
#define SMC_CLC_MAX_V6_PREFIX 8
|
|
#define SMC_CLC_MAX_UEID 8
|
|
|
|
struct smc_clc_msg_proposal_area {
|
|
struct smc_clc_msg_proposal pclc_base;
|
|
struct smc_clc_msg_smcd pclc_smcd;
|
|
struct smc_clc_msg_proposal_prefix pclc_prfx;
|
|
struct smc_clc_ipv6_prefix pclc_prfx_ipv6[SMC_CLC_MAX_V6_PREFIX];
|
|
struct smc_clc_v2_extension pclc_v2_ext;
|
|
u8 user_eids[SMC_CLC_MAX_UEID][SMC_MAX_EID_LEN];
|
|
struct smc_clc_smcd_v2_extension pclc_smcd_v2_ext;
|
|
struct smc_clc_smcd_gid_chid pclc_gidchids[SMC_MAX_ISM_DEVS];
|
|
struct smc_clc_msg_trail pclc_trl;
|
|
};
|
|
|
|
struct smcr_clc_msg_accept_confirm { /* SMCR accept/confirm */
|
|
struct smc_clc_msg_local lcl;
|
|
u8 qpn[3]; /* QP number */
|
|
__be32 rmb_rkey; /* RMB rkey */
|
|
u8 rmbe_idx; /* Index of RMBE in RMB */
|
|
__be32 rmbe_alert_token; /* unique connection id */
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
u8 rmbe_size : 4, /* buf size (compressed) */
|
|
qp_mtu : 4; /* QP mtu */
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u8 qp_mtu : 4,
|
|
rmbe_size : 4;
|
|
#endif
|
|
u8 reserved;
|
|
__be64 rmb_dma_addr; /* RMB virtual address */
|
|
u8 reserved2;
|
|
u8 psn[3]; /* packet sequence number */
|
|
} __packed;
|
|
|
|
struct smcd_clc_msg_accept_confirm_common { /* SMCD accept/confirm */
|
|
u64 gid; /* Sender GID */
|
|
u64 token; /* DMB token */
|
|
u8 dmbe_idx; /* DMBE index */
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
u8 dmbe_size : 4, /* buf size (compressed) */
|
|
reserved3 : 4;
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u8 reserved3 : 4,
|
|
dmbe_size : 4;
|
|
#endif
|
|
u16 reserved4;
|
|
__be32 linkid; /* Link identifier */
|
|
} __packed;
|
|
|
|
#define SMC_CLC_OS_ZOS 1
|
|
#define SMC_CLC_OS_LINUX 2
|
|
#define SMC_CLC_OS_AIX 3
|
|
|
|
struct smc_clc_first_contact_ext {
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
u8 v2_direct : 1,
|
|
reserved : 7;
|
|
u8 os_type : 4,
|
|
release : 4;
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u8 reserved : 7,
|
|
v2_direct : 1;
|
|
u8 release : 4,
|
|
os_type : 4;
|
|
#endif
|
|
u8 reserved2[2];
|
|
u8 hostname[SMC_MAX_HOSTNAME_LEN];
|
|
};
|
|
|
|
struct smc_clc_fce_gid_ext {
|
|
u8 reserved[16];
|
|
u8 gid_cnt;
|
|
u8 reserved2[3];
|
|
u8 gid[][SMC_GID_SIZE];
|
|
};
|
|
|
|
struct smc_clc_msg_accept_confirm { /* clc accept / confirm message */
|
|
struct smc_clc_msg_hdr hdr;
|
|
union {
|
|
struct smcr_clc_msg_accept_confirm r0; /* SMC-R */
|
|
struct { /* SMC-D */
|
|
struct smcd_clc_msg_accept_confirm_common d0;
|
|
u32 reserved5[3];
|
|
};
|
|
};
|
|
} __packed; /* format defined in RFC7609 */
|
|
|
|
struct smc_clc_msg_accept_confirm_v2 { /* clc accept / confirm message */
|
|
struct smc_clc_msg_hdr hdr;
|
|
union {
|
|
struct { /* SMC-R */
|
|
struct smcr_clc_msg_accept_confirm r0;
|
|
u8 eid[SMC_MAX_EID_LEN];
|
|
u8 reserved6[8];
|
|
} r1;
|
|
struct { /* SMC-D */
|
|
struct smcd_clc_msg_accept_confirm_common d0;
|
|
__be16 chid;
|
|
u8 eid[SMC_MAX_EID_LEN];
|
|
u8 reserved5[8];
|
|
} d1;
|
|
};
|
|
};
|
|
|
|
struct smc_clc_msg_decline { /* clc decline message */
|
|
struct smc_clc_msg_hdr hdr;
|
|
u8 id_for_peer[SMC_SYSTEMID_LEN]; /* sender peer_id */
|
|
__be32 peer_diagnosis; /* diagnosis information */
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
u8 os_type : 4,
|
|
reserved : 4;
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u8 reserved : 4,
|
|
os_type : 4;
|
|
#endif
|
|
u8 reserved2[3];
|
|
struct smc_clc_msg_trail trl; /* eye catcher "SMCD" or "SMCR" EBCDIC */
|
|
} __aligned(4);
|
|
|
|
#define SMC_DECL_DIAG_COUNT_V2 4 /* no. of additional peer diagnosis codes */
|
|
|
|
struct smc_clc_msg_decline_v2 { /* clc decline message */
|
|
struct smc_clc_msg_hdr hdr;
|
|
u8 id_for_peer[SMC_SYSTEMID_LEN]; /* sender peer_id */
|
|
__be32 peer_diagnosis; /* diagnosis information */
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
u8 os_type : 4,
|
|
reserved : 4;
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u8 reserved : 4,
|
|
os_type : 4;
|
|
#endif
|
|
u8 reserved2[3];
|
|
__be32 peer_diagnosis_v2[SMC_DECL_DIAG_COUNT_V2];
|
|
struct smc_clc_msg_trail trl; /* eye catcher "SMCD" or "SMCR" EBCDIC */
|
|
} __aligned(4);
|
|
|
|
/* 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)
|
|
{
|
|
return (struct smc_clc_msg_proposal_prefix *)
|
|
((u8 *)pclc + sizeof(*pclc) + ntohs(pclc->iparea_offset));
|
|
}
|
|
|
|
static inline bool smcr_indicated(int smc_type)
|
|
{
|
|
return smc_type == SMC_TYPE_R || smc_type == SMC_TYPE_B;
|
|
}
|
|
|
|
static inline bool smcd_indicated(int smc_type)
|
|
{
|
|
return smc_type == SMC_TYPE_D || smc_type == SMC_TYPE_B;
|
|
}
|
|
|
|
static inline u8 smc_indicated_type(int is_smcd, int is_smcr)
|
|
{
|
|
if (is_smcd && is_smcr)
|
|
return SMC_TYPE_B;
|
|
if (is_smcd)
|
|
return SMC_TYPE_D;
|
|
if (is_smcr)
|
|
return SMC_TYPE_R;
|
|
return SMC_TYPE_N;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
if (smcd_indicated(prop->hdr.typev1) &&
|
|
ntohs(prop->iparea_offset) != sizeof(struct smc_clc_msg_smcd))
|
|
return NULL;
|
|
|
|
return (struct smc_clc_msg_smcd *)(prop + 1);
|
|
}
|
|
|
|
static inline struct smc_clc_v2_extension *
|
|
smc_get_clc_v2_ext(struct smc_clc_msg_proposal *prop)
|
|
{
|
|
struct smc_clc_msg_smcd *prop_smcd = smc_get_clc_msg_smcd(prop);
|
|
|
|
if (!prop_smcd || !ntohs(prop_smcd->v2_ext_offset))
|
|
return NULL;
|
|
|
|
return (struct smc_clc_v2_extension *)
|
|
((u8 *)prop_smcd +
|
|
offsetof(struct smc_clc_msg_smcd, v2_ext_offset) +
|
|
sizeof(prop_smcd->v2_ext_offset) +
|
|
ntohs(prop_smcd->v2_ext_offset));
|
|
}
|
|
|
|
static inline struct smc_clc_smcd_v2_extension *
|
|
smc_get_clc_smcd_v2_ext(struct smc_clc_v2_extension *prop_v2ext)
|
|
{
|
|
if (!prop_v2ext)
|
|
return NULL;
|
|
if (!ntohs(prop_v2ext->hdr.smcd_v2_ext_offset))
|
|
return NULL;
|
|
|
|
return (struct smc_clc_smcd_v2_extension *)
|
|
((u8 *)prop_v2ext +
|
|
offsetof(struct smc_clc_v2_extension, hdr) +
|
|
offsetof(struct smc_clnt_opts_area_hdr, smcd_v2_ext_offset) +
|
|
sizeof(prop_v2ext->hdr.smcd_v2_ext_offset) +
|
|
ntohs(prop_v2ext->hdr.smcd_v2_ext_offset));
|
|
}
|
|
|
|
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);
|
|
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
|