Merge branch 'smc-rv23'

Karsten Graul says:

====================
net/smc: introduce SMC-Rv2 support

Please apply the following patch series for smc to netdev's net-next tree.

SMC-Rv2 support (see https://www.ibm.com/support/pages/node/6326337)
provides routable RoCE support for SMC-R, eliminating the current
same-subnet restriction, by exploiting the UDP encapsulation feature
of the RoCE adapter hardware.

v2: resend of the v1 patch series, and CC linux-rdma this time
v3: rebase after net tree was merged into net-next
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

include/uapi/linux/smc.h

@@ -84,17 +84,28 @@ enum {
 	SMC_NLA_SYS_IS_ISM_V2,		/* u8 */
 	SMC_NLA_SYS_LOCAL_HOST,		/* string */
 	SMC_NLA_SYS_SEID,		/* string */
+	SMC_NLA_SYS_IS_SMCR_V2,		/* u8 */
 	__SMC_NLA_SYS_MAX,
 	SMC_NLA_SYS_MAX = __SMC_NLA_SYS_MAX - 1
 };
 
-/* SMC_NLA_LGR_V2 nested attributes */
+/* SMC_NLA_LGR_D_V2_COMMON and SMC_NLA_LGR_R_V2_COMMON nested attributes */
 enum {
 	SMC_NLA_LGR_V2_VER,		/* u8 */
 	SMC_NLA_LGR_V2_REL,		/* u8 */
 	SMC_NLA_LGR_V2_OS,		/* u8 */
 	SMC_NLA_LGR_V2_NEG_EID,		/* string */
 	SMC_NLA_LGR_V2_PEER_HOST,	/* string */
+	__SMC_NLA_LGR_V2_MAX,
+	SMC_NLA_LGR_V2_MAX = __SMC_NLA_LGR_V2_MAX - 1
+};
+
+/* SMC_NLA_LGR_R_V2 nested attributes */
+enum {
+	SMC_NLA_LGR_R_V2_UNSPEC,
+	SMC_NLA_LGR_R_V2_DIRECT,	/* u8 */
+	__SMC_NLA_LGR_R_V2_MAX,
+	SMC_NLA_LGR_R_V2_MAX = __SMC_NLA_LGR_R_V2_MAX - 1
 };
 
 /* SMC_GEN_LGR_SMCR attributes */
@@ -106,6 +117,8 @@ enum {
 	SMC_NLA_LGR_R_PNETID,		/* string */
 	SMC_NLA_LGR_R_VLAN_ID,		/* u8 */
 	SMC_NLA_LGR_R_CONNS_NUM,	/* u32 */
+	SMC_NLA_LGR_R_V2_COMMON,	/* nest */
+	SMC_NLA_LGR_R_V2,		/* nest */
 	__SMC_NLA_LGR_R_MAX,
 	SMC_NLA_LGR_R_MAX = __SMC_NLA_LGR_R_MAX - 1
 };
@@ -138,7 +151,7 @@ enum {
 	SMC_NLA_LGR_D_PNETID,		/* string */
 	SMC_NLA_LGR_D_CHID,		/* u16 */
 	SMC_NLA_LGR_D_PAD,		/* flag */
-	SMC_NLA_LGR_V2,			/* nest */
+	SMC_NLA_LGR_D_V2_COMMON,	/* nest */
 	__SMC_NLA_LGR_D_MAX,
 	SMC_NLA_LGR_D_MAX = __SMC_NLA_LGR_D_MAX - 1
 };

net/smc/smc.h

@@ -56,7 +56,20 @@ enum smc_state {		/* possible states of an SMC socket */
 struct smc_link_group;
 
 struct smc_wr_rx_hdr {	/* common prefix part of LLC and CDC to demultiplex */
-	u8			type;
+	union {
+		u8 type;
+#if defined(__BIG_ENDIAN_BITFIELD)
+		struct {
+			u8 llc_version:4,
+			   llc_type:4;
+		};
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+		struct {
+			u8 llc_type:4,
+			   llc_version:4;
+		};
+#endif
+	};
 } __aligned(1);
 
 struct smc_cdc_conn_state_flags {
@@ -286,7 +299,12 @@ static inline bool using_ipsec(struct smc_sock *smc)
 }
 #endif
 
+struct smc_gidlist;
+
 struct sock *smc_accept_dequeue(struct sock *parent, struct socket *new_sock);
 void smc_close_non_accepted(struct sock *sk);
+void smc_fill_gid_list(struct smc_link_group *lgr,
+		       struct smc_gidlist *gidlist,
+		       struct smc_ib_device *known_dev, u8 *known_gid);
 
 #endif	/* __SMC_H */

net/smc/smc_clc.h

@@ -44,6 +44,7 @@
 #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 */
@@ -54,6 +55,8 @@
 #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		      */
@@ -213,11 +216,14 @@ struct smcd_clc_msg_accept_confirm_common {	/* SMCD accept/confirm */
 #define SMC_CLC_OS_AIX		3
 
 struct smc_clc_first_contact_ext {
-	u8 reserved1;
 #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
@@ -225,6 +231,13 @@ struct smc_clc_first_contact_ext {
 	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 {
@@ -239,13 +252,17 @@ struct smc_clc_msg_accept_confirm {	/* clc accept / confirm message */
 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-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;
 	};
 };
 
@@ -264,6 +281,24 @@ struct smc_clc_msg_decline {	/* clc decline message */
 	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)
@@ -282,6 +317,17 @@ 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)
@@ -334,7 +380,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
 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);
+			 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;
@@ -343,6 +389,7 @@ 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);

net/smc/smc_core.c

@@ -244,6 +244,8 @@ int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb)
 		goto errattr;
 	if (nla_put_u8(skb, SMC_NLA_SYS_IS_ISM_V2, smc_ism_is_v2_capable()))
 		goto errattr;
+	if (nla_put_u8(skb, SMC_NLA_SYS_IS_SMCR_V2, true))
+		goto errattr;
 	smc_clc_get_hostname(&host);
 	if (host) {
 		memcpy(hostname, host, SMC_MAX_HOSTNAME_LEN);
@@ -271,12 +273,65 @@ int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb)
 	return skb->len;
 }
 
+/* Fill SMC_NLA_LGR_D_V2_COMMON/SMC_NLA_LGR_R_V2_COMMON nested attributes */
+static int smc_nl_fill_lgr_v2_common(struct smc_link_group *lgr,
+				     struct sk_buff *skb,
+				     struct netlink_callback *cb,
+				     struct nlattr *v2_attrs)
+{
+	char smc_host[SMC_MAX_HOSTNAME_LEN + 1];
+	char smc_eid[SMC_MAX_EID_LEN + 1];
+
+	if (nla_put_u8(skb, SMC_NLA_LGR_V2_VER, lgr->smc_version))
+		goto errv2attr;
+	if (nla_put_u8(skb, SMC_NLA_LGR_V2_REL, lgr->peer_smc_release))
+		goto errv2attr;
+	if (nla_put_u8(skb, SMC_NLA_LGR_V2_OS, lgr->peer_os))
+		goto errv2attr;
+	memcpy(smc_host, lgr->peer_hostname, SMC_MAX_HOSTNAME_LEN);
+	smc_host[SMC_MAX_HOSTNAME_LEN] = 0;
+	if (nla_put_string(skb, SMC_NLA_LGR_V2_PEER_HOST, smc_host))
+		goto errv2attr;
+	memcpy(smc_eid, lgr->negotiated_eid, SMC_MAX_EID_LEN);
+	smc_eid[SMC_MAX_EID_LEN] = 0;
+	if (nla_put_string(skb, SMC_NLA_LGR_V2_NEG_EID, smc_eid))
+		goto errv2attr;
+
+	nla_nest_end(skb, v2_attrs);
+	return 0;
+
+errv2attr:
+	nla_nest_cancel(skb, v2_attrs);
+	return -EMSGSIZE;
+}
+
+static int smc_nl_fill_smcr_lgr_v2(struct smc_link_group *lgr,
+				   struct sk_buff *skb,
+				   struct netlink_callback *cb)
+{
+	struct nlattr *v2_attrs;
+
+	v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_R_V2);
+	if (!v2_attrs)
+		goto errattr;
+	if (nla_put_u8(skb, SMC_NLA_LGR_R_V2_DIRECT, !lgr->uses_gateway))
+		goto errv2attr;
+
+	nla_nest_end(skb, v2_attrs);
+	return 0;
+
+errv2attr:
+	nla_nest_cancel(skb, v2_attrs);
+errattr:
+	return -EMSGSIZE;
+}
+
 static int smc_nl_fill_lgr(struct smc_link_group *lgr,
 			   struct sk_buff *skb,
 			   struct netlink_callback *cb)
 {
 	char smc_target[SMC_MAX_PNETID_LEN + 1];
-	struct nlattr *attrs;
+	struct nlattr *attrs, *v2_attrs;
 
 	attrs = nla_nest_start(skb, SMC_GEN_LGR_SMCR);
 	if (!attrs)
@@ -296,6 +351,15 @@ static int smc_nl_fill_lgr(struct smc_link_group *lgr,
 	smc_target[SMC_MAX_PNETID_LEN] = 0;
 	if (nla_put_string(skb, SMC_NLA_LGR_R_PNETID, smc_target))
 		goto errattr;
+	if (lgr->smc_version > SMC_V1) {
+		v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_R_V2_COMMON);
+		if (!v2_attrs)
+			goto errattr;
+		if (smc_nl_fill_lgr_v2_common(lgr, skb, cb, v2_attrs))
+			goto errattr;
+		if (smc_nl_fill_smcr_lgr_v2(lgr, skb, cb))
+			goto errattr;
+	}
 
 	nla_nest_end(skb, attrs);
 	return 0;
@@ -428,10 +492,7 @@ static int smc_nl_fill_smcd_lgr(struct smc_link_group *lgr,
 				struct sk_buff *skb,
 				struct netlink_callback *cb)
 {
-	char smc_host[SMC_MAX_HOSTNAME_LEN + 1];
 	char smc_pnet[SMC_MAX_PNETID_LEN + 1];
-	char smc_eid[SMC_MAX_EID_LEN + 1];
-	struct nlattr *v2_attrs;
 	struct nlattr *attrs;
 	void *nlh;
 
@@ -463,32 +524,19 @@ static int smc_nl_fill_smcd_lgr(struct smc_link_group *lgr,
 	smc_pnet[SMC_MAX_PNETID_LEN] = 0;
 	if (nla_put_string(skb, SMC_NLA_LGR_D_PNETID, smc_pnet))
 		goto errattr;
+	if (lgr->smc_version > SMC_V1) {
+		struct nlattr *v2_attrs;
 
-	v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_V2);
-	if (!v2_attrs)
-		goto errattr;
-	if (nla_put_u8(skb, SMC_NLA_LGR_V2_VER, lgr->smc_version))
-		goto errv2attr;
-	if (nla_put_u8(skb, SMC_NLA_LGR_V2_REL, lgr->peer_smc_release))
-		goto errv2attr;
-	if (nla_put_u8(skb, SMC_NLA_LGR_V2_OS, lgr->peer_os))
-		goto errv2attr;
-	memcpy(smc_host, lgr->peer_hostname, SMC_MAX_HOSTNAME_LEN);
-	smc_host[SMC_MAX_HOSTNAME_LEN] = 0;
-	if (nla_put_string(skb, SMC_NLA_LGR_V2_PEER_HOST, smc_host))
-		goto errv2attr;
-	memcpy(smc_eid, lgr->negotiated_eid, SMC_MAX_EID_LEN);
-	smc_eid[SMC_MAX_EID_LEN] = 0;
-	if (nla_put_string(skb, SMC_NLA_LGR_V2_NEG_EID, smc_eid))
-		goto errv2attr;
-
-	nla_nest_end(skb, v2_attrs);
+		v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_D_V2_COMMON);
+		if (!v2_attrs)
+			goto errattr;
+		if (smc_nl_fill_lgr_v2_common(lgr, skb, cb, v2_attrs))
+			goto errattr;
+	}
 	nla_nest_end(skb, attrs);
 	genlmsg_end(skb, nlh);
 	return 0;
 
-errv2attr:
-	nla_nest_cancel(skb, v2_attrs);
 errattr:
 	nla_nest_cancel(skb, attrs);
 errout:
@@ -684,24 +732,30 @@ static void smcr_copy_dev_info_to_link(struct smc_link *link)
 int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
 		   u8 link_idx, struct smc_init_info *ini)
 {
+	struct smc_ib_device *smcibdev;
 	u8 rndvec[3];
 	int rc;
 
-	get_device(&ini->ib_dev->ibdev->dev);
-	atomic_inc(&ini->ib_dev->lnk_cnt);
+	if (lgr->smc_version == SMC_V2) {
+		lnk->smcibdev = ini->smcrv2.ib_dev_v2;
+		lnk->ibport = ini->smcrv2.ib_port_v2;
+	} else {
+		lnk->smcibdev = ini->ib_dev;
+		lnk->ibport = ini->ib_port;
+	}
+	get_device(&lnk->smcibdev->ibdev->dev);
+	atomic_inc(&lnk->smcibdev->lnk_cnt);
+	lnk->path_mtu = lnk->smcibdev->pattr[lnk->ibport - 1].active_mtu;
 	lnk->link_id = smcr_next_link_id(lgr);
 	lnk->lgr = lgr;
 	lnk->link_idx = link_idx;
-	lnk->smcibdev = ini->ib_dev;
-	lnk->ibport = ini->ib_port;
 	smc_ibdev_cnt_inc(lnk);
 	smcr_copy_dev_info_to_link(lnk);
-	lnk->path_mtu = ini->ib_dev->pattr[ini->ib_port - 1].active_mtu;
 	atomic_set(&lnk->conn_cnt, 0);
 	smc_llc_link_set_uid(lnk);
 	INIT_WORK(&lnk->link_down_wrk, smc_link_down_work);
-	if (!ini->ib_dev->initialized) {
-		rc = (int)smc_ib_setup_per_ibdev(ini->ib_dev);
+	if (!lnk->smcibdev->initialized) {
+		rc = (int)smc_ib_setup_per_ibdev(lnk->smcibdev);
 		if (rc)
 			goto out;
 	}
@@ -709,7 +763,9 @@ int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
 	lnk->psn_initial = rndvec[0] + (rndvec[1] << 8) +
 		(rndvec[2] << 16);
 	rc = smc_ib_determine_gid(lnk->smcibdev, lnk->ibport,
-				  ini->vlan_id, lnk->gid, &lnk->sgid_index);
+				  ini->vlan_id, lnk->gid, &lnk->sgid_index,
+				  lgr->smc_version == SMC_V2 ?
+						  &ini->smcrv2 : NULL);
 	if (rc)
 		goto out;
 	rc = smc_llc_link_init(lnk);
@@ -740,11 +796,12 @@ int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
 	smc_llc_link_clear(lnk, false);
 out:
 	smc_ibdev_cnt_dec(lnk);
-	put_device(&ini->ib_dev->ibdev->dev);
+	put_device(&lnk->smcibdev->ibdev->dev);
+	smcibdev = lnk->smcibdev;
 	memset(lnk, 0, sizeof(struct smc_link));
 	lnk->state = SMC_LNK_UNUSED;
-	if (!atomic_dec_return(&ini->ib_dev->lnk_cnt))
-		wake_up(&ini->ib_dev->lnks_deleted);
+	if (!atomic_dec_return(&smcibdev->lnk_cnt))
+		wake_up(&smcibdev->lnks_deleted);
 	return rc;
 }
 
@@ -808,18 +865,37 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
 		atomic_inc(&ini->ism_dev[ini->ism_selected]->lgr_cnt);
 	} else {
 		/* SMC-R specific settings */
+		struct smc_ib_device *ibdev;
+		int ibport;
+
 		lgr->role = smc->listen_smc ? SMC_SERV : SMC_CLNT;
-		memcpy(lgr->peer_systemid, ini->ib_lcl->id_for_peer,
+		lgr->smc_version = ini->smcr_version;
+		memcpy(lgr->peer_systemid, ini->peer_systemid,
 		       SMC_SYSTEMID_LEN);
-		memcpy(lgr->pnet_id, ini->ib_dev->pnetid[ini->ib_port - 1],
+		if (lgr->smc_version == SMC_V2) {
+			ibdev = ini->smcrv2.ib_dev_v2;
+			ibport = ini->smcrv2.ib_port_v2;
+			lgr->saddr = ini->smcrv2.saddr;
+			lgr->uses_gateway = ini->smcrv2.uses_gateway;
+			memcpy(lgr->nexthop_mac, ini->smcrv2.nexthop_mac,
+			       ETH_ALEN);
+		} else {
+			ibdev = ini->ib_dev;
+			ibport = ini->ib_port;
+		}
+		memcpy(lgr->pnet_id, ibdev->pnetid[ibport - 1],
 		       SMC_MAX_PNETID_LEN);
+		if (smc_wr_alloc_lgr_mem(lgr))
+			goto free_wq;
 		smc_llc_lgr_init(lgr, smc);
 
 		link_idx = SMC_SINGLE_LINK;
 		lnk = &lgr->lnk[link_idx];
 		rc = smcr_link_init(lgr, lnk, link_idx, ini);
-		if (rc)
+		if (rc) {
+			smc_wr_free_lgr_mem(lgr);
 			goto free_wq;
+		}
 		lgr_list = &smc_lgr_list.list;
 		lgr_lock = &smc_lgr_list.lock;
 		atomic_inc(&lgr_cnt);
@@ -1226,6 +1302,7 @@ static void smc_lgr_free(struct smc_link_group *lgr)
 		if (!atomic_dec_return(&lgr->smcd->lgr_cnt))
 			wake_up(&lgr->smcd->lgrs_deleted);
 	} else {
+		smc_wr_free_lgr_mem(lgr);
 		if (!atomic_dec_return(&lgr_cnt))
 			wake_up(&lgrs_deleted);
 	}
@@ -1636,13 +1713,15 @@ int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini)
 	return rc;
 }
 
-static bool smcr_lgr_match(struct smc_link_group *lgr,
-			   struct smc_clc_msg_local *lcl,
+static bool smcr_lgr_match(struct smc_link_group *lgr, u8 smcr_version,
+			   u8 peer_systemid[],
+			   u8 peer_gid[],
+			   u8 peer_mac_v1[],
 			   enum smc_lgr_role role, u32 clcqpn)
 {
 	int i;
 
-	if (memcmp(lgr->peer_systemid, lcl->id_for_peer, SMC_SYSTEMID_LEN) ||
+	if (memcmp(lgr->peer_systemid, peer_systemid, SMC_SYSTEMID_LEN) ||
 	    lgr->role != role)
 		return false;
 
@@ -1650,8 +1729,9 @@ static bool smcr_lgr_match(struct smc_link_group *lgr,
 		if (!smc_link_active(&lgr->lnk[i]))
 			continue;
 		if ((lgr->role == SMC_SERV || lgr->lnk[i].peer_qpn == clcqpn) &&
-		    !memcmp(lgr->lnk[i].peer_gid, &lcl->gid, SMC_GID_SIZE) &&
-		    !memcmp(lgr->lnk[i].peer_mac, lcl->mac, sizeof(lcl->mac)))
+		    !memcmp(lgr->lnk[i].peer_gid, peer_gid, SMC_GID_SIZE) &&
+		    (smcr_version == SMC_V2 ||
+		     !memcmp(lgr->lnk[i].peer_mac, peer_mac_v1, ETH_ALEN)))
 			return true;
 	}
 	return false;
@@ -1690,7 +1770,10 @@ int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini)
 		if ((ini->is_smcd ?
 		     smcd_lgr_match(lgr, ini->ism_dev[ini->ism_selected],
 				    ini->ism_peer_gid[ini->ism_selected]) :
-		     smcr_lgr_match(lgr, ini->ib_lcl, role, ini->ib_clcqpn)) &&
+		     smcr_lgr_match(lgr, ini->smcr_version,
+				    ini->peer_systemid,
+				    ini->peer_gid, ini->peer_mac, role,
+				    ini->ib_clcqpn)) &&
 		    !lgr->sync_err &&
 		    (ini->smcd_version == SMC_V2 ||
 		     lgr->vlan_id == ini->vlan_id) &&

net/smc/smc_core.h

@@ -42,11 +42,16 @@ enum smc_link_state {			/* possible states of a link */
 };
 
 #define SMC_WR_BUF_SIZE		48	/* size of work request buffer */
+#define SMC_WR_BUF_V2_SIZE	8192	/* size of v2 work request buffer */
 
 struct smc_wr_buf {
 	u8	raw[SMC_WR_BUF_SIZE];
 };
 
+struct smc_wr_v2_buf {
+	u8	raw[SMC_WR_BUF_V2_SIZE];
+};
+
 #define SMC_WR_REG_MR_WAIT_TIME	(5 * HZ)/* wait time for ib_wr_reg_mr result */
 
 enum smc_wr_reg_state {
@@ -92,7 +97,11 @@ struct smc_link {
 	struct smc_wr_tx_pend	*wr_tx_pends;	/* WR send waiting for CQE */
 	struct completion	*wr_tx_compl;	/* WR send CQE completion */
 	/* above four vectors have wr_tx_cnt elements and use the same index */
+	struct ib_send_wr	*wr_tx_v2_ib;	/* WR send v2 meta data */
+	struct ib_sge		*wr_tx_v2_sge;	/* WR send v2 gather meta data*/
+	struct smc_wr_tx_pend	*wr_tx_v2_pend;	/* WR send v2 waiting for CQE */
 	dma_addr_t		wr_tx_dma_addr;	/* DMA address of wr_tx_bufs */
+	dma_addr_t		wr_tx_v2_dma_addr; /* DMA address of v2 tx buf*/
 	atomic_long_t		wr_tx_id;	/* seq # of last sent WR */
 	unsigned long		*wr_tx_mask;	/* bit mask of used indexes */
 	u32			wr_tx_cnt;	/* number of WR send buffers */
@@ -104,6 +113,7 @@ struct smc_link {
 	struct ib_sge		*wr_rx_sges;	/* WR recv scatter meta data */
 	/* above three vectors have wr_rx_cnt elements and use the same index */
 	dma_addr_t		wr_rx_dma_addr;	/* DMA address of wr_rx_bufs */
+	dma_addr_t		wr_rx_v2_dma_addr; /* DMA address of v2 rx buf*/
 	u64			wr_rx_id;	/* seq # of last recv WR */
 	u32			wr_rx_cnt;	/* number of WR recv buffers */
 	unsigned long		wr_rx_tstamp;	/* jiffies when last buf rx */
@@ -208,6 +218,7 @@ enum smc_llc_flowtype {
 	SMC_LLC_FLOW_NONE	= 0,
 	SMC_LLC_FLOW_ADD_LINK	= 2,
 	SMC_LLC_FLOW_DEL_LINK	= 4,
+	SMC_LLC_FLOW_REQ_ADD_LINK = 5,
 	SMC_LLC_FLOW_RKEY	= 6,
 };
 
@@ -250,6 +261,10 @@ struct smc_link_group {
 						/* client or server */
 			struct smc_link		lnk[SMC_LINKS_PER_LGR_MAX];
 						/* smc link */
+			struct smc_wr_v2_buf	*wr_rx_buf_v2;
+						/* WR v2 recv payload buffer */
+			struct smc_wr_v2_buf	*wr_tx_buf_v2;
+						/* WR v2 send payload buffer */
 			char			peer_systemid[SMC_SYSTEMID_LEN];
 						/* unique system_id of peer */
 			struct smc_rtoken	rtokens[SMC_RMBS_PER_LGR_MAX]
@@ -288,6 +303,9 @@ struct smc_link_group {
 						/* link keep alive time */
 			u32			llc_termination_rsn;
 						/* rsn code for termination */
+			u8			nexthop_mac[ETH_ALEN];
+			u8			uses_gateway;
+			__be32			saddr;
 		};
 		struct { /* SMC-D */
 			u64			peer_gid;
@@ -302,6 +320,31 @@ struct smc_link_group {
 
 struct smc_clc_msg_local;
 
+#define GID_LIST_SIZE	2
+
+struct smc_gidlist {
+	u8			len;
+	u8			list[GID_LIST_SIZE][SMC_GID_SIZE];
+};
+
+struct smc_init_info_smcrv2 {
+	/* Input fields */
+	__be32			saddr;
+	struct sock		*clc_sk;
+	__be32			daddr;
+
+	/* Output fields when saddr is set */
+	struct smc_ib_device	*ib_dev_v2;
+	u8			ib_port_v2;
+	u8			ib_gid_v2[SMC_GID_SIZE];
+
+	/* Additional output fields when clc_sk and daddr is set as well */
+	u8			uses_gateway;
+	u8			nexthop_mac[ETH_ALEN];
+
+	struct smc_gidlist	gidlist;
+};
+
 struct smc_init_info {
 	u8			is_smcd;
 	u8			smc_type_v1;
@@ -312,11 +355,16 @@ struct smc_init_info {
 	u32			rc;
 	u8			negotiated_eid[SMC_MAX_EID_LEN];
 	/* SMC-R */
-	struct smc_clc_msg_local *ib_lcl;
+	u8			smcr_version;
+	u8			check_smcrv2;
+	u8			peer_gid[SMC_GID_SIZE];
+	u8			peer_mac[ETH_ALEN];
+	u8			peer_systemid[SMC_SYSTEMID_LEN];
 	struct smc_ib_device	*ib_dev;
 	u8			ib_gid[SMC_GID_SIZE];
 	u8			ib_port;
 	u32			ib_clcqpn;
+	struct smc_init_info_smcrv2 smcrv2;
 	/* SMC-D */
 	u64			ism_peer_gid[SMC_MAX_ISM_DEVS + 1];
 	struct smcd_dev		*ism_dev[SMC_MAX_ISM_DEVS + 1];

net/smc/smc_ib.c

@@ -17,6 +17,7 @@
 #include <linux/scatterlist.h>
 #include <linux/wait.h>
 #include <linux/mutex.h>
+#include <linux/inetdevice.h>
 #include <rdma/ib_verbs.h>
 #include <rdma/ib_cache.h>
 
@@ -62,16 +63,23 @@ static int smc_ib_modify_qp_rtr(struct smc_link *lnk)
 		IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | IB_QP_DEST_QPN |
 		IB_QP_RQ_PSN | IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER;
 	struct ib_qp_attr qp_attr;
+	u8 hop_lim = 1;
 
 	memset(&qp_attr, 0, sizeof(qp_attr));
 	qp_attr.qp_state = IB_QPS_RTR;
 	qp_attr.path_mtu = min(lnk->path_mtu, lnk->peer_mtu);
 	qp_attr.ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE;
 	rdma_ah_set_port_num(&qp_attr.ah_attr, lnk->ibport);
-	rdma_ah_set_grh(&qp_attr.ah_attr, NULL, 0, lnk->sgid_index, 1, 0);
+	if (lnk->lgr->smc_version == SMC_V2 && lnk->lgr->uses_gateway)
+		hop_lim = IPV6_DEFAULT_HOPLIMIT;
+	rdma_ah_set_grh(&qp_attr.ah_attr, NULL, 0, lnk->sgid_index, hop_lim, 0);
 	rdma_ah_set_dgid_raw(&qp_attr.ah_attr, lnk->peer_gid);
-	memcpy(&qp_attr.ah_attr.roce.dmac, lnk->peer_mac,
-	       sizeof(lnk->peer_mac));
+	if (lnk->lgr->smc_version == SMC_V2 && lnk->lgr->uses_gateway)
+		memcpy(&qp_attr.ah_attr.roce.dmac, lnk->lgr->nexthop_mac,
+		       sizeof(lnk->lgr->nexthop_mac));
+	else
+		memcpy(&qp_attr.ah_attr.roce.dmac, lnk->peer_mac,
+		       sizeof(lnk->peer_mac));
 	qp_attr.dest_qp_num = lnk->peer_qpn;
 	qp_attr.rq_psn = lnk->peer_psn; /* starting receive packet seq # */
 	qp_attr.max_dest_rd_atomic = 1; /* max # of resources for incoming
@@ -183,9 +191,81 @@ bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport)
 	return smcibdev->pattr[ibport - 1].state == IB_PORT_ACTIVE;
 }
 
+int smc_ib_find_route(__be32 saddr, __be32 daddr,
+		      u8 nexthop_mac[], u8 *uses_gateway)
+{
+	struct neighbour *neigh = NULL;
+	struct rtable *rt = NULL;
+	struct flowi4 fl4 = {
+		.saddr = saddr,
+		.daddr = daddr
+	};
+
+	if (daddr == cpu_to_be32(INADDR_NONE))
+		goto out;
+	rt = ip_route_output_flow(&init_net, &fl4, NULL);
+	if (IS_ERR(rt))
+		goto out;
+	if (rt->rt_uses_gateway && rt->rt_gw_family != AF_INET)
+		goto out;
+	neigh = rt->dst.ops->neigh_lookup(&rt->dst, NULL, &fl4.daddr);
+	if (neigh) {
+		memcpy(nexthop_mac, neigh->ha, ETH_ALEN);
+		*uses_gateway = rt->rt_uses_gateway;
+		return 0;
+	}
+out:
+	return -ENOENT;
+}
+
+static int smc_ib_determine_gid_rcu(const struct net_device *ndev,
+				    const struct ib_gid_attr *attr,
+				    u8 gid[], u8 *sgid_index,
+				    struct smc_init_info_smcrv2 *smcrv2)
+{
+	if (!smcrv2 && attr->gid_type == IB_GID_TYPE_ROCE) {
+		if (gid)
+			memcpy(gid, &attr->gid, SMC_GID_SIZE);
+		if (sgid_index)
+			*sgid_index = attr->index;
+		return 0;
+	}
+	if (smcrv2 && attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP &&
+	    smc_ib_gid_to_ipv4((u8 *)&attr->gid) != cpu_to_be32(INADDR_NONE)) {
+		struct in_device *in_dev = __in_dev_get_rcu(ndev);
+		const struct in_ifaddr *ifa;
+		bool subnet_match = false;
+
+		if (!in_dev)
+			goto out;
+		in_dev_for_each_ifa_rcu(ifa, in_dev) {
+			if (!inet_ifa_match(smcrv2->saddr, ifa))
+				continue;
+			subnet_match = true;
+			break;
+		}
+		if (!subnet_match)
+			goto out;
+		if (smcrv2->daddr && smc_ib_find_route(smcrv2->saddr,
+						       smcrv2->daddr,
+						       smcrv2->nexthop_mac,
+						       &smcrv2->uses_gateway))
+			goto out;
+
+		if (gid)
+			memcpy(gid, &attr->gid, SMC_GID_SIZE);
+		if (sgid_index)
+			*sgid_index = attr->index;
+		return 0;
+	}
+out:
+	return -ENODEV;
+}
+
 /* determine the gid for an ib-device port and vlan id */
 int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
-			 unsigned short vlan_id, u8 gid[], u8 *sgid_index)
+			 unsigned short vlan_id, u8 gid[], u8 *sgid_index,
+			 struct smc_init_info_smcrv2 *smcrv2)
 {
 	const struct ib_gid_attr *attr;
 	const struct net_device *ndev;
@@ -201,15 +281,13 @@ int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
 		if (!IS_ERR(ndev) &&
 		    ((!vlan_id && !is_vlan_dev(ndev)) ||
 		     (vlan_id && is_vlan_dev(ndev) &&
-		      vlan_dev_vlan_id(ndev) == vlan_id)) &&
-		    attr->gid_type == IB_GID_TYPE_ROCE) {
-			rcu_read_unlock();
-			if (gid)
-				memcpy(gid, &attr->gid, SMC_GID_SIZE);
-			if (sgid_index)
-				*sgid_index = attr->index;
-			rdma_put_gid_attr(attr);
-			return 0;
+		      vlan_dev_vlan_id(ndev) == vlan_id))) {
+			if (!smc_ib_determine_gid_rcu(ndev, attr, gid,
+						      sgid_index, smcrv2)) {
+				rcu_read_unlock();
+				rdma_put_gid_attr(attr);
+				return 0;
+			}
 		}
 		rcu_read_unlock();
 		rdma_put_gid_attr(attr);
@@ -217,6 +295,58 @@ int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
 	return -ENODEV;
 }
 
+/* check if gid is still defined on smcibdev */
+static bool smc_ib_check_link_gid(u8 gid[SMC_GID_SIZE], bool smcrv2,
+				  struct smc_ib_device *smcibdev, u8 ibport)
+{
+	const struct ib_gid_attr *attr;
+	bool rc = false;
+	int i;
+
+	for (i = 0; !rc && i < smcibdev->pattr[ibport - 1].gid_tbl_len; i++) {
+		attr = rdma_get_gid_attr(smcibdev->ibdev, ibport, i);
+		if (IS_ERR(attr))
+			continue;
+
+		rcu_read_lock();
+		if ((!smcrv2 && attr->gid_type == IB_GID_TYPE_ROCE) ||
+		    (smcrv2 && attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP &&
+		     !(ipv6_addr_type((const struct in6_addr *)&attr->gid)
+				     & IPV6_ADDR_LINKLOCAL)))
+			if (!memcmp(gid, &attr->gid, SMC_GID_SIZE))
+				rc = true;
+		rcu_read_unlock();
+		rdma_put_gid_attr(attr);
+	}
+	return rc;
+}
+
+/* check all links if the gid is still defined on smcibdev */
+static void smc_ib_gid_check(struct smc_ib_device *smcibdev, u8 ibport)
+{
+	struct smc_link_group *lgr;
+	int i;
+
+	spin_lock_bh(&smc_lgr_list.lock);
+	list_for_each_entry(lgr, &smc_lgr_list.list, list) {
+		if (strncmp(smcibdev->pnetid[ibport - 1], lgr->pnet_id,
+			    SMC_MAX_PNETID_LEN))
+			continue; /* lgr is not affected */
+		if (list_empty(&lgr->list))
+			continue;
+		for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
+			if (lgr->lnk[i].state == SMC_LNK_UNUSED ||
+			    lgr->lnk[i].smcibdev != smcibdev)
+				continue;
+			if (!smc_ib_check_link_gid(lgr->lnk[i].gid,
+						   lgr->smc_version == SMC_V2,
+						   smcibdev, ibport))
+				smcr_port_err(smcibdev, ibport);
+		}
+	}
+	spin_unlock_bh(&smc_lgr_list.lock);
+}
+
 static int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport)
 {
 	int rc;
@@ -255,6 +385,7 @@ static void smc_ib_port_event_work(struct work_struct *work)
 		} else {
 			clear_bit(port_idx, smcibdev->ports_going_away);
 			smcr_port_add(smcibdev, port_idx + 1);
+			smc_ib_gid_check(smcibdev, port_idx + 1);
 		}
 	}
 }
@@ -523,6 +654,7 @@ void smc_ib_destroy_queue_pair(struct smc_link *lnk)
 /* create a queue pair within the protection domain for a link */
 int smc_ib_create_queue_pair(struct smc_link *lnk)
 {
+	int sges_per_buf = (lnk->lgr->smc_version == SMC_V2) ? 2 : 1;
 	struct ib_qp_init_attr qp_attr = {
 		.event_handler = smc_ib_qp_event_handler,
 		.qp_context = lnk,
@@ -536,7 +668,7 @@ int smc_ib_create_queue_pair(struct smc_link *lnk)
 			.max_send_wr = SMC_WR_BUF_CNT * 3,
 			.max_recv_wr = SMC_WR_BUF_CNT * 3,
 			.max_send_sge = SMC_IB_MAX_SEND_SGE,
-			.max_recv_sge = 1,
+			.max_recv_sge = sges_per_buf,
 		},
 		.sq_sig_type = IB_SIGNAL_REQ_WR,
 		.qp_type = IB_QPT_RC,

net/smc/smc_ib.h

@@ -59,6 +59,17 @@ struct smc_ib_device {				/* ib-device infos for smc */
 	int			ndev_ifidx[SMC_MAX_PORTS]; /* ndev if indexes */
 };
 
+static inline __be32 smc_ib_gid_to_ipv4(u8 gid[SMC_GID_SIZE])
+{
+	struct in6_addr *addr6 = (struct in6_addr *)gid;
+
+	if (ipv6_addr_v4mapped(addr6) ||
+	    !(addr6->s6_addr32[0] | addr6->s6_addr32[1] | addr6->s6_addr32[2]))
+		return addr6->s6_addr32[3];
+	return cpu_to_be32(INADDR_NONE);
+}
+
+struct smc_init_info_smcrv2;
 struct smc_buf_desc;
 struct smc_link;
 
@@ -90,7 +101,10 @@ void smc_ib_sync_sg_for_device(struct smc_link *lnk,
 			       struct smc_buf_desc *buf_slot,
 			       enum dma_data_direction data_direction);
 int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
-			 unsigned short vlan_id, u8 gid[], u8 *sgid_index);
+			 unsigned short vlan_id, u8 gid[], u8 *sgid_index,
+			 struct smc_init_info_smcrv2 *smcrv2);
+int smc_ib_find_route(__be32 saddr, __be32 daddr,
+		      u8 nexthop_mac[], u8 *uses_gateway);
 bool smc_ib_is_valid_local_systemid(void);
 int smcr_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
 #endif

net/smc/smc_llc.h

@@ -30,10 +30,19 @@ enum smc_llc_msg_type {
 	SMC_LLC_ADD_LINK		= 0x02,
 	SMC_LLC_ADD_LINK_CONT		= 0x03,
 	SMC_LLC_DELETE_LINK		= 0x04,
+	SMC_LLC_REQ_ADD_LINK		= 0x05,
 	SMC_LLC_CONFIRM_RKEY		= 0x06,
 	SMC_LLC_TEST_LINK		= 0x07,
 	SMC_LLC_CONFIRM_RKEY_CONT	= 0x08,
 	SMC_LLC_DELETE_RKEY		= 0x09,
+	/* V2 types */
+	SMC_LLC_CONFIRM_LINK_V2		= 0x21,
+	SMC_LLC_ADD_LINK_V2		= 0x22,
+	SMC_LLC_DELETE_LINK_V2		= 0x24,
+	SMC_LLC_REQ_ADD_LINK_V2		= 0x25,
+	SMC_LLC_CONFIRM_RKEY_V2		= 0x26,
+	SMC_LLC_TEST_LINK_V2		= 0x27,
+	SMC_LLC_DELETE_RKEY_V2		= 0x29,
 };
 
 #define smc_link_downing(state) \
@@ -102,7 +111,8 @@ void smc_llc_flow_qentry_del(struct smc_llc_flow *flow);
 void smc_llc_send_link_delete_all(struct smc_link_group *lgr, bool ord,
 				  u32 rsn);
 int smc_llc_cli_add_link(struct smc_link *link, struct smc_llc_qentry *qentry);
-int smc_llc_srv_add_link(struct smc_link *link);
+int smc_llc_srv_add_link(struct smc_link *link,
+			 struct smc_llc_qentry *req_qentry);
 void smc_llc_add_link_local(struct smc_link *link);
 int smc_llc_init(void) __init;
 

net/smc/smc_pnet.c

@@ -953,6 +953,26 @@ static int smc_pnet_find_ndev_pnetid_by_table(struct net_device *ndev,
 	return rc;
 }
 
+static int smc_pnet_determine_gid(struct smc_ib_device *ibdev, int i,
+				  struct smc_init_info *ini)
+{
+	if (!ini->check_smcrv2 &&
+	    !smc_ib_determine_gid(ibdev, i, ini->vlan_id, ini->ib_gid, NULL,
+				  NULL)) {
+		ini->ib_dev = ibdev;
+		ini->ib_port = i;
+		return 0;
+	}
+	if (ini->check_smcrv2 &&
+	    !smc_ib_determine_gid(ibdev, i, ini->vlan_id, ini->smcrv2.ib_gid_v2,
+				  NULL, &ini->smcrv2)) {
+		ini->smcrv2.ib_dev_v2 = ibdev;
+		ini->smcrv2.ib_port_v2 = i;
+		return 0;
+	}
+	return -ENODEV;
+}
+
 /* find a roce device for the given pnetid */
 static void _smc_pnet_find_roce_by_pnetid(u8 *pnet_id,
 					  struct smc_init_info *ini,
@@ -961,7 +981,6 @@ static void _smc_pnet_find_roce_by_pnetid(u8 *pnet_id,
 	struct smc_ib_device *ibdev;
 	int i;
 
-	ini->ib_dev = NULL;
 	mutex_lock(&smc_ib_devices.mutex);
 	list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
 		if (ibdev == known_dev)
@@ -971,12 +990,9 @@ static void _smc_pnet_find_roce_by_pnetid(u8 *pnet_id,
 				continue;
 			if (smc_pnet_match(ibdev->pnetid[i - 1], pnet_id) &&
 			    smc_ib_port_active(ibdev, i) &&
-			    !test_bit(i - 1, ibdev->ports_going_away) &&
-			    !smc_ib_determine_gid(ibdev, i, ini->vlan_id,
-						  ini->ib_gid, NULL)) {
-				ini->ib_dev = ibdev;
-				ini->ib_port = i;
-				goto out;
+			    !test_bit(i - 1, ibdev->ports_going_away)) {
+				if (!smc_pnet_determine_gid(ibdev, i, ini))
+					goto out;
 			}
 		}
 	}
@@ -1016,12 +1032,9 @@ static void smc_pnet_find_rdma_dev(struct net_device *netdev,
 			dev_put(ndev);
 			if (netdev == ndev &&
 			    smc_ib_port_active(ibdev, i) &&
-			    !test_bit(i - 1, ibdev->ports_going_away) &&
-			    !smc_ib_determine_gid(ibdev, i, ini->vlan_id,
-						  ini->ib_gid, NULL)) {
-				ini->ib_dev = ibdev;
-				ini->ib_port = i;
-				break;
+			    !test_bit(i - 1, ibdev->ports_going_away)) {
+				if (!smc_pnet_determine_gid(ibdev, i, ini))
+					break;
 			}
 		}
 	}
@@ -1083,8 +1096,6 @@ void smc_pnet_find_roce_resource(struct sock *sk, struct smc_init_info *ini)
 {
 	struct dst_entry *dst = sk_dst_get(sk);
 
-	ini->ib_dev = NULL;
-	ini->ib_port = 0;
 	if (!dst)
 		goto out;
 	if (!dst->dev)

net/smc/smc_wr.h

@@ -101,8 +101,10 @@ static inline int smc_wr_rx_post(struct smc_link *link)
 
 int smc_wr_create_link(struct smc_link *lnk);
 int smc_wr_alloc_link_mem(struct smc_link *lnk);
+int smc_wr_alloc_lgr_mem(struct smc_link_group *lgr);
 void smc_wr_free_link(struct smc_link *lnk);
 void smc_wr_free_link_mem(struct smc_link *lnk);
+void smc_wr_free_lgr_mem(struct smc_link_group *lgr);
 void smc_wr_remember_qp_attr(struct smc_link *lnk);
 void smc_wr_remove_dev(struct smc_ib_device *smcibdev);
 void smc_wr_add_dev(struct smc_ib_device *smcibdev);
@@ -111,10 +113,16 @@ int smc_wr_tx_get_free_slot(struct smc_link *link, smc_wr_tx_handler handler,
 			    struct smc_wr_buf **wr_buf,
 			    struct smc_rdma_wr **wrs,
 			    struct smc_wr_tx_pend_priv **wr_pend_priv);
+int smc_wr_tx_get_v2_slot(struct smc_link *link,
+			  smc_wr_tx_handler handler,
+			  struct smc_wr_v2_buf **wr_buf,
+			  struct smc_wr_tx_pend_priv **wr_pend_priv);
 int smc_wr_tx_put_slot(struct smc_link *link,
 		       struct smc_wr_tx_pend_priv *wr_pend_priv);
 int smc_wr_tx_send(struct smc_link *link,
 		   struct smc_wr_tx_pend_priv *wr_pend_priv);
+int smc_wr_tx_v2_send(struct smc_link *link,
+		      struct smc_wr_tx_pend_priv *priv, int len);
 int smc_wr_tx_send_wait(struct smc_link *link, struct smc_wr_tx_pend_priv *priv,
 			unsigned long timeout);
 void smc_wr_tx_cq_handler(struct ib_cq *ib_cq, void *cq_context);