Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 333 insertions, 0 deletions

diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
new file mode 100644
index 000000000..c579d1d59
--- /dev/null
+++ b/net/smc/smc_clc.h
@@ -0,0 +1,333 @@
+/* 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 "smc.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_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_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
+
+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;
+        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 {
+        u8 reserved1;
+#if defined(__BIG_ENDIAN_BITFIELD)
+        u8 os_type : 4,
+           release : 4;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+        u8 release : 4,
+           os_type : 4;
+#endif
+        u8 reserved2[2];
+        u8 hostname[SMC_MAX_HOSTNAME_LEN];
+};
+
+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 smcr_clc_msg_accept_confirm r0; /* SMC-R */
+                struct { /* SMC-D */
+                        struct smcd_clc_msg_accept_confirm_common d0;
+                        __be16 chid;
+                        u8 eid[SMC_MAX_EID_LEN];
+                        u8 reserved5[8];
+                };
+        };
+};
+
+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);
+
+/* 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;
+}
+
+/* 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);
+int smc_clc_send_accept(struct smc_sock *smc, bool srv_first_contact,
+                        u8 version);
+void smc_clc_init(void) __init;
+
+#endif