diff mbox series

[RFC,v2,net-next,1/6] net/smc: support smc release version negotiation in clc handshake

Message ID 20230807062720.20555-2-guangguan.wang@linux.alibaba.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net/smc: several features's implementation for smc v2.1 | expand

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Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1330 this patch: 1330
netdev/cc_maintainers success CCed 12 of 12 maintainers
netdev/build_clang success Errors and warnings before: 1353 this patch: 1353
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1353 this patch: 1353
netdev/checkpatch warning WARNING: line length of 82 exceeds 80 columns WARNING: line length of 83 exceeds 80 columns WARNING: line length of 94 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Guangguan Wang Aug. 7, 2023, 6:27 a.m. UTC 
Support smc release version negotiation in clc handshake. And set
the latest smc release version to 2.1.

Signed-off-by: Guangguan Wang <guangguan.wang@linux.alibaba.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
---
 net/smc/af_smc.c   | 22 ++++++++++++++++++++--
 net/smc/smc.h      |  5 ++++-
 net/smc/smc_clc.c  | 14 +++++++-------
 net/smc/smc_clc.h  | 23 ++++++++++++++++++++++-
 net/smc/smc_core.h |  1 +
 5 files changed, 54 insertions(+), 11 deletions(-)

Comments

Wenjia Zhang Aug. 9, 2023, 4:03 p.m. UTC | #1 
On 07.08.23 08:27, Guangguan Wang wrote:
> Support smc release version negotiation in clc handshake. And set
> the latest smc release version to 2.1.
> 

Could you elaborate the changes? Without reading code, it is really 
difficult to know what you did, and why you did it. Sure, one can read 
the code and the support document, but the commit message should always 
be the quick reference. The following information I missed especially:
- This implementation is based on SMCv2 where no negotiation process for 
different releases, but for different versions.
- The Server makes the decision for which release will be used.

> Signed-off-by: Guangguan Wang <guangguan.wang@linux.alibaba.com>
> Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
> ---
>   net/smc/af_smc.c   | 22 ++++++++++++++++++++--
>   net/smc/smc.h      |  5 ++++-
>   net/smc/smc_clc.c  | 14 +++++++-------
>   net/smc/smc_clc.h  | 23 ++++++++++++++++++++++-
>   net/smc/smc_core.h |  1 +
>   5 files changed, 54 insertions(+), 11 deletions(-)
> 
> diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
> index a7f887d91d89..bac73eb0542d 100644
> --- a/net/smc/af_smc.c
> +++ b/net/smc/af_smc.c
> @@ -1187,6 +1187,11 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc,
>   			return SMC_CLC_DECL_NOINDIRECT;
>   		}
>   	}
> +
> +	if (fce->release > SMC_RELEASE)
> +		return SMC_CLC_DECL_VERSMISMAT;
I'm wondering if this check is necessary, how it could happen?

> +	ini->release_ver = fce->release;
> +
>   	return 0;
>   }
>   
> @@ -1355,6 +1360,15 @@ static int smc_connect_ism(struct smc_sock *smc,
>   		struct smc_clc_msg_accept_confirm_v2 *aclc_v2 =
>   			(struct smc_clc_msg_accept_confirm_v2 *)aclc;
>   
> +		if (ini->first_contact_peer) {
> +			struct smc_clc_first_contact_ext *fce =
> +				smc_get_clc_first_contact_ext(aclc_v2, true);
> +
> +			if (fce->release > SMC_RELEASE)
> +				return SMC_CLC_DECL_VERSMISMAT;
> +			ini->release_ver = fce->release;
> +		}
> +
>   		rc = smc_v2_determine_accepted_chid(aclc_v2, ini);
>   		if (rc)
>   			return rc;
> @@ -1389,7 +1403,7 @@ static int smc_connect_ism(struct smc_sock *smc,
>   	}
>   
>   	rc = smc_clc_send_confirm(smc, ini->first_contact_local,
> -				  aclc->hdr.version, eid, NULL);
> +				  aclc->hdr.version, eid, ini);
>   	if (rc)
>   		goto connect_abort;
>   	mutex_unlock(&smc_server_lgr_pending);
> @@ -1965,6 +1979,10 @@ static int smc_listen_v2_check(struct smc_sock *new_smc,
>   		}
>   	}
>   
> +	ini->release_ver = pclc_v2_ext->hdr.flag.release;
> +	if (pclc_v2_ext->hdr.flag.release > SMC_RELEASE)
> +		ini->release_ver = SMC_RELEASE;
> +
>   out:
>   	if (!ini->smcd_version && !ini->smcr_version)
>   		return rc;
> @@ -2412,7 +2430,7 @@ static void smc_listen_work(struct work_struct *work)
>   	/* send SMC Accept CLC message */
>   	accept_version = ini->is_smcd ? ini->smcd_version : ini->smcr_version;
>   	rc = smc_clc_send_accept(new_smc, ini->first_contact_local,
> -				 accept_version, ini->negotiated_eid);
> +				 accept_version, ini->negotiated_eid, ini);
>   	if (rc)
>   		goto out_unlock;
>   
> diff --git a/net/smc/smc.h b/net/smc/smc.h
> index 2eeea4cdc718..9cce1a41e011 100644
> --- a/net/smc/smc.h
> +++ b/net/smc/smc.h
> @@ -21,7 +21,10 @@
>   
>   #define SMC_V1		1		/* SMC version V1 */
>   #define SMC_V2		2		/* SMC version V2 */
> -#define SMC_RELEASE	0
> +
> +#define SMC_RELEASE_0 0
> +#define SMC_RELEASE_1 1
> +#define SMC_RELEASE	SMC_RELEASE_1 /* the latest release version */
>   
>   #define SMCPROTO_SMC		0	/* SMC protocol, IPv4 */
>   #define SMCPROTO_SMC6		1	/* SMC protocol, IPv6 */
> diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
> index b9b8b07aa702..4ae27bf65732 100644
> --- a/net/smc/smc_clc.c
> +++ b/net/smc/smc_clc.c
> @@ -420,11 +420,11 @@ smc_clc_msg_decl_valid(struct smc_clc_msg_decline *dclc)
>   	return true;
>   }
>   
> -static void smc_clc_fill_fce(struct smc_clc_first_contact_ext *fce, int *len)
> +static void smc_clc_fill_fce(struct smc_clc_first_contact_ext *fce, int *len, int release_ver)
>   {
>   	memset(fce, 0, sizeof(*fce));
>   	fce->os_type = SMC_CLC_OS_LINUX;
> -	fce->release = SMC_RELEASE;
> +	fce->release = release_ver;
>   	memcpy(fce->hostname, smc_hostname, sizeof(smc_hostname));
>   	(*len) += sizeof(*fce);
>   }

Personally I'd like release_nr instead of release_ver.

> @@ -1019,7 +1019,7 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
>   				memcpy(clc_v2->d1.eid, eid, SMC_MAX_EID_LEN);
>   			len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2;
>   			if (first_contact)
> -				smc_clc_fill_fce(&fce, &len);
> +				smc_clc_fill_fce(&fce, &len, ini->release_ver);
>   			clc_v2->hdr.length = htons(len);
>   		}
>   		memcpy(trl.eyecatcher, SMCD_EYECATCHER,
> @@ -1063,10 +1063,10 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
>   				memcpy(clc_v2->r1.eid, eid, SMC_MAX_EID_LEN);
>   			len = SMCR_CLC_ACCEPT_CONFIRM_LEN_V2;
>   			if (first_contact) {
> -				smc_clc_fill_fce(&fce, &len);
> +				smc_clc_fill_fce(&fce, &len, ini->release_ver);
>   				fce.v2_direct = !link->lgr->uses_gateway;
>   				memset(&gle, 0, sizeof(gle));
> -				if (ini && clc->hdr.type == SMC_CLC_CONFIRM) {
> +				if (clc->hdr.type == SMC_CLC_CONFIRM) {
>   					gle.gid_cnt = ini->smcrv2.gidlist.len;
>   					len += sizeof(gle);
>   					len += gle.gid_cnt * sizeof(gle.gid[0]);
> @@ -1141,7 +1141,7 @@ int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact,
>   
>   /* send CLC ACCEPT message across internal TCP socket */
>   int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact,
> -			u8 version, u8 *negotiated_eid)
> +			u8 version, u8 *negotiated_eid, struct smc_init_info *ini)
>   {
>   	struct smc_clc_msg_accept_confirm_v2 aclc_v2;
>   	int len;
> @@ -1149,7 +1149,7 @@ int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact,
>   	memset(&aclc_v2, 0, sizeof(aclc_v2));
>   	aclc_v2.hdr.type = SMC_CLC_ACCEPT;
>   	len = smc_clc_send_confirm_accept(new_smc, &aclc_v2, srv_first_contact,
> -					  version, negotiated_eid, NULL);
> +					  version, negotiated_eid, ini);
>   	if (len < ntohs(aclc_v2.hdr.length))
>   		len = len >= 0 ? -EPROTO : -new_smc->clcsock->sk->sk_err;
>   
> diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
> index 5fee545c9a10..b923e89acafb 100644
> --- a/net/smc/smc_clc.h
> +++ b/net/smc/smc_clc.h
> @@ -370,6 +370,27 @@ smc_get_clc_smcd_v2_ext(struct smc_clc_v2_extension *prop_v2ext)
>   		 ntohs(prop_v2ext->hdr.smcd_v2_ext_offset));
>   }
>   
> +static inline struct smc_clc_first_contact_ext *
> +smc_get_clc_first_contact_ext(struct smc_clc_msg_accept_confirm_v2 *clc_v2,
> +			      bool is_smcd)
> +{
> +	int clc_v2_len;
> +
> +	if (clc_v2->hdr.version == SMC_V1 ||
> +	    !(clc_v2->hdr.typev2 & SMC_FIRST_CONTACT_MASK))
> +		return NULL;
> +
> +	if (is_smcd)
> +		clc_v2_len =
> +			offsetofend(struct smc_clc_msg_accept_confirm_v2, d1);
> +	else
> +		clc_v2_len =
> +			offsetofend(struct smc_clc_msg_accept_confirm_v2, r1);
> +
> +	return (struct smc_clc_first_contact_ext *)(((u8 *)clc_v2) +
> +						    clc_v2_len);
> +}
> +
>   struct smcd_dev;
>   struct smc_init_info;
>   
> @@ -382,7 +403,7 @@ 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);
> +			u8 version, u8 *negotiated_eid, struct smc_init_info *ini);
>   void smc_clc_init(void) __init;
>   void smc_clc_exit(void);
>   void smc_clc_get_hostname(u8 **host);
> diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
> index 3c1b31bfa1cf..1a97fef39127 100644
> --- a/net/smc/smc_core.h
> +++ b/net/smc/smc_core.h
> @@ -374,6 +374,7 @@ struct smc_init_info {
>   	u8			is_smcd;
>   	u8			smc_type_v1;
>   	u8			smc_type_v2;
> +	u8			release_ver;

Also here, I'd like release_nr more.

>   	u8			first_contact_peer;
>   	u8			first_contact_local;
>   	unsigned short		vlan_id;
Guangguan Wang Aug. 15, 2023, 3:57 a.m. UTC | #2 
On 2023/8/10 00:03, Wenjia Zhang wrote:
> 
> 
> On 07.08.23 08:27, Guangguan Wang wrote:
>> Support smc release version negotiation in clc handshake. And set
>> the latest smc release version to 2.1.
>>
> 
> Could you elaborate the changes? Without reading code, it is really difficult to know what you did, and why you did it. Sure, one can read the code and the support document, but the commit message should always be the quick reference. The following information I missed especially:
> - This implementation is based on SMCv2 where no negotiation process for different releases, but for different versions.
> - The Server makes the decision for which release will be used.

Sorry for the lack of descriptions, more descriptions will be added in the next version.

>>
>> diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
>> index a7f887d91d89..bac73eb0542d 100644
>> --- a/net/smc/af_smc.c
>> +++ b/net/smc/af_smc.c
>> @@ -1187,6 +1187,11 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc,
>>               return SMC_CLC_DECL_NOINDIRECT;
>>           }
>>       }
>> +
>> +    if (fce->release > SMC_RELEASE)
>> +        return SMC_CLC_DECL_VERSMISMAT;
> I'm wondering if this check is necessary, how it could happen?

You are right, I will remove the check.

>>   -static void smc_clc_fill_fce(struct smc_clc_first_contact_ext *fce, int *len)
>> +static void smc_clc_fill_fce(struct smc_clc_first_contact_ext *fce, int *len, int release_ver)
>>   {
>>       memset(fce, 0, sizeof(*fce));
>>       fce->os_type = SMC_CLC_OS_LINUX;
>> -    fce->release = SMC_RELEASE;
>> +    fce->release = release_ver;
>>       memcpy(fce->hostname, smc_hostname, sizeof(smc_hostname));
>>       (*len) += sizeof(*fce);
>>   }
> 
> Personally I'd like release_nr instead of release_ver.


>>   @@ -382,7 +403,7 @@ 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);
>> +            u8 version, u8 *negotiated_eid, struct smc_init_info *ini);
>>   void smc_clc_init(void) __init;
>>   void smc_clc_exit(void);
>>   void smc_clc_get_hostname(u8 **host);
>> diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
>> index 3c1b31bfa1cf..1a97fef39127 100644
>> --- a/net/smc/smc_core.h
>> +++ b/net/smc/smc_core.h
>> @@ -374,6 +374,7 @@ struct smc_init_info {
>>       u8            is_smcd;
>>       u8            smc_type_v1;
>>       u8            smc_type_v2;
>> +    u8            release_ver;
> 
> Also here, I'd like release_nr more.

OK, I will modify it in the next version.
diff mbox series

Patch

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index a7f887d91d89..bac73eb0542d 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1187,6 +1187,11 @@  static int smc_connect_rdma_v2_prepare(struct smc_sock *smc,
 			return SMC_CLC_DECL_NOINDIRECT;
 		}
 	}
+
+	if (fce->release > SMC_RELEASE)
+		return SMC_CLC_DECL_VERSMISMAT;
+	ini->release_ver = fce->release;
+
 	return 0;
 }
 
@@ -1355,6 +1360,15 @@  static int smc_connect_ism(struct smc_sock *smc,
 		struct smc_clc_msg_accept_confirm_v2 *aclc_v2 =
 			(struct smc_clc_msg_accept_confirm_v2 *)aclc;
 
+		if (ini->first_contact_peer) {
+			struct smc_clc_first_contact_ext *fce =
+				smc_get_clc_first_contact_ext(aclc_v2, true);
+
+			if (fce->release > SMC_RELEASE)
+				return SMC_CLC_DECL_VERSMISMAT;
+			ini->release_ver = fce->release;
+		}
+
 		rc = smc_v2_determine_accepted_chid(aclc_v2, ini);
 		if (rc)
 			return rc;
@@ -1389,7 +1403,7 @@  static int smc_connect_ism(struct smc_sock *smc,
 	}
 
 	rc = smc_clc_send_confirm(smc, ini->first_contact_local,
-				  aclc->hdr.version, eid, NULL);
+				  aclc->hdr.version, eid, ini);
 	if (rc)
 		goto connect_abort;
 	mutex_unlock(&smc_server_lgr_pending);
@@ -1965,6 +1979,10 @@  static int smc_listen_v2_check(struct smc_sock *new_smc,
 		}
 	}
 
+	ini->release_ver = pclc_v2_ext->hdr.flag.release;
+	if (pclc_v2_ext->hdr.flag.release > SMC_RELEASE)
+		ini->release_ver = SMC_RELEASE;
+
 out:
 	if (!ini->smcd_version && !ini->smcr_version)
 		return rc;
@@ -2412,7 +2430,7 @@  static void smc_listen_work(struct work_struct *work)
 	/* send SMC Accept CLC message */
 	accept_version = ini->is_smcd ? ini->smcd_version : ini->smcr_version;
 	rc = smc_clc_send_accept(new_smc, ini->first_contact_local,
-				 accept_version, ini->negotiated_eid);
+				 accept_version, ini->negotiated_eid, ini);
 	if (rc)
 		goto out_unlock;
 
diff --git a/net/smc/smc.h b/net/smc/smc.h
index 2eeea4cdc718..9cce1a41e011 100644
--- a/net/smc/smc.h
+++ b/net/smc/smc.h
@@ -21,7 +21,10 @@ 
 
 #define SMC_V1		1		/* SMC version V1 */
 #define SMC_V2		2		/* SMC version V2 */
-#define SMC_RELEASE	0
+
+#define SMC_RELEASE_0 0
+#define SMC_RELEASE_1 1
+#define SMC_RELEASE	SMC_RELEASE_1 /* the latest release version */
 
 #define SMCPROTO_SMC		0	/* SMC protocol, IPv4 */
 #define SMCPROTO_SMC6		1	/* SMC protocol, IPv6 */
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index b9b8b07aa702..4ae27bf65732 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -420,11 +420,11 @@  smc_clc_msg_decl_valid(struct smc_clc_msg_decline *dclc)
 	return true;
 }
 
-static void smc_clc_fill_fce(struct smc_clc_first_contact_ext *fce, int *len)
+static void smc_clc_fill_fce(struct smc_clc_first_contact_ext *fce, int *len, int release_ver)
 {
 	memset(fce, 0, sizeof(*fce));
 	fce->os_type = SMC_CLC_OS_LINUX;
-	fce->release = SMC_RELEASE;
+	fce->release = release_ver;
 	memcpy(fce->hostname, smc_hostname, sizeof(smc_hostname));
 	(*len) += sizeof(*fce);
 }
@@ -1019,7 +1019,7 @@  static int smc_clc_send_confirm_accept(struct smc_sock *smc,
 				memcpy(clc_v2->d1.eid, eid, SMC_MAX_EID_LEN);
 			len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2;
 			if (first_contact)
-				smc_clc_fill_fce(&fce, &len);
+				smc_clc_fill_fce(&fce, &len, ini->release_ver);
 			clc_v2->hdr.length = htons(len);
 		}
 		memcpy(trl.eyecatcher, SMCD_EYECATCHER,
@@ -1063,10 +1063,10 @@  static int smc_clc_send_confirm_accept(struct smc_sock *smc,
 				memcpy(clc_v2->r1.eid, eid, SMC_MAX_EID_LEN);
 			len = SMCR_CLC_ACCEPT_CONFIRM_LEN_V2;
 			if (first_contact) {
-				smc_clc_fill_fce(&fce, &len);
+				smc_clc_fill_fce(&fce, &len, ini->release_ver);
 				fce.v2_direct = !link->lgr->uses_gateway;
 				memset(&gle, 0, sizeof(gle));
-				if (ini && clc->hdr.type == SMC_CLC_CONFIRM) {
+				if (clc->hdr.type == SMC_CLC_CONFIRM) {
 					gle.gid_cnt = ini->smcrv2.gidlist.len;
 					len += sizeof(gle);
 					len += gle.gid_cnt * sizeof(gle.gid[0]);
@@ -1141,7 +1141,7 @@  int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact,
 
 /* send CLC ACCEPT message across internal TCP socket */
 int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact,
-			u8 version, u8 *negotiated_eid)
+			u8 version, u8 *negotiated_eid, struct smc_init_info *ini)
 {
 	struct smc_clc_msg_accept_confirm_v2 aclc_v2;
 	int len;
@@ -1149,7 +1149,7 @@  int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact,
 	memset(&aclc_v2, 0, sizeof(aclc_v2));
 	aclc_v2.hdr.type = SMC_CLC_ACCEPT;
 	len = smc_clc_send_confirm_accept(new_smc, &aclc_v2, srv_first_contact,
-					  version, negotiated_eid, NULL);
+					  version, negotiated_eid, ini);
 	if (len < ntohs(aclc_v2.hdr.length))
 		len = len >= 0 ? -EPROTO : -new_smc->clcsock->sk->sk_err;
 
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
index 5fee545c9a10..b923e89acafb 100644
--- a/net/smc/smc_clc.h
+++ b/net/smc/smc_clc.h
@@ -370,6 +370,27 @@  smc_get_clc_smcd_v2_ext(struct smc_clc_v2_extension *prop_v2ext)
 		 ntohs(prop_v2ext->hdr.smcd_v2_ext_offset));
 }
 
+static inline struct smc_clc_first_contact_ext *
+smc_get_clc_first_contact_ext(struct smc_clc_msg_accept_confirm_v2 *clc_v2,
+			      bool is_smcd)
+{
+	int clc_v2_len;
+
+	if (clc_v2->hdr.version == SMC_V1 ||
+	    !(clc_v2->hdr.typev2 & SMC_FIRST_CONTACT_MASK))
+		return NULL;
+
+	if (is_smcd)
+		clc_v2_len =
+			offsetofend(struct smc_clc_msg_accept_confirm_v2, d1);
+	else
+		clc_v2_len =
+			offsetofend(struct smc_clc_msg_accept_confirm_v2, r1);
+
+	return (struct smc_clc_first_contact_ext *)(((u8 *)clc_v2) +
+						    clc_v2_len);
+}
+
 struct smcd_dev;
 struct smc_init_info;
 
@@ -382,7 +403,7 @@  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);
+			u8 version, u8 *negotiated_eid, struct smc_init_info *ini);
 void smc_clc_init(void) __init;
 void smc_clc_exit(void);
 void smc_clc_get_hostname(u8 **host);
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 3c1b31bfa1cf..1a97fef39127 100644
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -374,6 +374,7 @@  struct smc_init_info {
 	u8			is_smcd;
 	u8			smc_type_v1;
 	u8			smc_type_v2;
+	u8			release_ver;
 	u8			first_contact_peer;
 	u8			first_contact_local;
 	unsigned short		vlan_id;