Support SMC v2.x features validate for SMC v2.1. This is the frame
code for SMC v2.x features validate, and will take effects only when
the negotiated release version is v2.1 or later.
For Server, v2.x features' validation should be done in smc_clc_srv_
v2x_features_validate when receiving v2.1 or later CLC Proposal Message,
such as max conns, max links negotiation, the decision of the final
value of max conns and max links should be made in this function.
And final check for server when receiving v2.1 or later CLC Confirm
Message should be done in smc_clc_v2x_features_confirm_check.
For client, v2.x features' validation should be done in smc_clc_cli_
v2x_features_validate when receiving v2.1 or later CLC Accept Message,
for example, the decision to accpt the accepted value or to decline
should be made in this function.
Signed-off-by: Guangguan Wang <[email protected]>
Reviewed-by: Tony Lu <[email protected]>
---
net/smc/af_smc.c | 18 ++++++++++++++++++
net/smc/smc_clc.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
net/smc/smc_clc.h | 7 +++++++
3 files changed, 71 insertions(+)
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 7b54c153bd0d..65c02b48331f 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1169,6 +1169,7 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc,
struct smc_clc_first_contact_ext *fce =
(struct smc_clc_first_contact_ext *)
(((u8 *)clc_v2) + sizeof(*clc_v2));
+ int rc;
if (!ini->first_contact_peer || aclc->hdr.version == SMC_V1)
return 0;
@@ -1189,6 +1190,9 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc,
}
ini->release_nr = fce->release;
+ rc = smc_clc_cli_v2x_features_validate(fce, ini);
+ if (rc)
+ return rc;
return 0;
}
@@ -1363,6 +1367,9 @@ static int smc_connect_ism(struct smc_sock *smc,
smc_get_clc_first_contact_ext(aclc_v2, true);
ini->release_nr = fce->release;
+ rc = smc_clc_cli_v2x_features_validate(fce, ini);
+ if (rc)
+ return rc;
}
rc = smc_v2_determine_accepted_chid(aclc_v2, ini);
@@ -2413,6 +2420,10 @@ static void smc_listen_work(struct work_struct *work)
if (rc)
goto out_decl;
+ rc = smc_clc_srv_v2x_features_validate(pclc, ini);
+ if (rc)
+ goto out_decl;
+
mutex_lock(&smc_server_lgr_pending);
smc_close_init(new_smc);
smc_rx_init(new_smc);
@@ -2445,6 +2456,13 @@ static void smc_listen_work(struct work_struct *work)
goto out_decl;
}
+ rc = smc_clc_v2x_features_confirm_check(cclc, ini);
+ if (rc) {
+ if (!ini->is_smcd)
+ goto out_unlock;
+ goto out_decl;
+ }
+
/* finish worker */
if (!ini->is_smcd) {
rc = smc_listen_rdma_finish(new_smc, cclc,
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index 624dc970d187..f71b22e50be5 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -1158,6 +1158,52 @@ int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact,
return len > 0 ? 0 : len;
}
+int smc_clc_srv_v2x_features_validate(struct smc_clc_msg_proposal *pclc,
+ struct smc_init_info *ini)
+{
+ struct smc_clc_v2_extension *pclc_v2_ext;
+
+ if ((!(ini->smcd_version & SMC_V2) && !(ini->smcr_version & SMC_V2)) ||
+ ini->release_nr < SMC_RELEASE_1)
+ return 0;
+
+ pclc_v2_ext = smc_get_clc_v2_ext(pclc);
+ if (!pclc_v2_ext)
+ return SMC_CLC_DECL_NOV2EXT;
+
+ return 0;
+}
+
+int smc_clc_cli_v2x_features_validate(struct smc_clc_first_contact_ext *fce,
+ struct smc_init_info *ini)
+{
+ if (ini->release_nr < SMC_RELEASE_1)
+ return 0;
+
+ return 0;
+}
+
+int smc_clc_v2x_features_confirm_check(struct smc_clc_msg_accept_confirm *cclc,
+ struct smc_init_info *ini)
+{
+ struct smc_clc_msg_accept_confirm_v2 *clc_v2 =
+ (struct smc_clc_msg_accept_confirm_v2 *)cclc;
+ struct smc_clc_first_contact_ext *fce =
+ smc_get_clc_first_contact_ext(clc_v2, ini->is_smcd);
+
+ if (cclc->hdr.version == SMC_V1 ||
+ !(cclc->hdr.typev2 & SMC_FIRST_CONTACT_MASK))
+ return 0;
+
+ if (ini->release_nr != fce->release)
+ return SMC_CLC_DECL_RELEASEERR;
+
+ if (fce->release < SMC_RELEASE_1)
+ return 0;
+
+ return 0;
+}
+
void smc_clc_get_hostname(u8 **host)
{
*host = &smc_hostname[0];
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
index 6133276a8839..66932bfdc6d0 100644
--- a/net/smc/smc_clc.h
+++ b/net/smc/smc_clc.h
@@ -45,6 +45,7 @@
#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_RELEASEERR 0x03030009 /* release version negotiate failed */
#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 */
@@ -415,6 +416,12 @@ 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, struct smc_init_info *ini);
+int smc_clc_srv_v2x_features_validate(struct smc_clc_msg_proposal *pclc,
+ struct smc_init_info *ini);
+int smc_clc_cli_v2x_features_validate(struct smc_clc_first_contact_ext *fce,
+ struct smc_init_info *ini);
+int smc_clc_v2x_features_confirm_check(struct smc_clc_msg_accept_confirm *cclc,
+ struct smc_init_info *ini);
void smc_clc_init(void) __init;
void smc_clc_exit(void);
void smc_clc_get_hostname(u8 **host);
--
2.24.3 (Apple Git-128)
On 2023/8/16 20:49, Vadim Fedorenko wrote:
> On 16/08/2023 09:33, Guangguan Wang wrote:
>> +
>> +int smc_clc_cli_v2x_features_validate(struct smc_clc_first_contact_ext *fce,
>> + struct smc_init_info *ini)
>> +{
>> + if (ini->release_nr < SMC_RELEASE_1)
>> + return 0;
>> +
>> + return 0;
>> +}
>
> This function always returns 0. Is it really what expected?
>
This patch is a frame code of v2x features validate.
Please read the next 2 patches, where will fill more code logic in this function.
[PATCH net-next 4/6] net/smc: support max connections per lgr negotiation
int smc_clc_cli_v2x_features_validate(struct smc_clc_first_contact_ext *fce,
struct smc_init_info *ini)
{
+ struct smc_clc_first_contact_ext_v2x *fce_v2x =
+ (struct smc_clc_first_contact_ext_v2x *)fce;
+
if (ini->release_nr < SMC_RELEASE_1)
return 0;
+ if (!ini->is_smcd) {
+ if (fce_v2x->max_conns < SMC_CONN_PER_LGR_MIN)
+ return SMC_CLC_DECL_MAXCONNERR;
+ ini->max_conns = fce_v2x->max_conns;
+ }
+
return 0;
}
[PATCH net-next 5/6] net/smc: support max links per lgr negotiation in clc handshake
@@ -1208,6 +1216,11 @@ int smc_clc_cli_v2x_features_validate(struct smc_clc_first_contact_ext *fce,
if (fce_v2x->max_conns < SMC_CONN_PER_LGR_MIN)
return SMC_CLC_DECL_MAXCONNERR;
ini->max_conns = fce_v2x->max_conns;
+
+ if (fce_v2x->max_links > SMC_LINKS_ADD_LNK_MAX ||
+ fce_v2x->max_links < SMC_LINKS_ADD_LNK_MIN)
+ return SMC_CLC_DECL_MAXLINKERR;
+ ini->max_links = fce_v2x->max_links;
}
return 0;
Thanks,
Guangguan Wang
On 2023/8/17 14:42, Jan Karcher wrote:
> Hi Guangguan Wang,
>
> minor renaming.
>
> On 16/08/2023 10:33, Guangguan Wang wrote:
>> Support SMC v2.x features validate for SMC v2.1. This is the frame
>> code for SMC v2.x features validate, and will take effects only when
>> the negotiated release version is v2.1 or later.
>>
>> For Server, v2.x features' validation should be done in smc_clc_srv_
>> v2x_features_validate when receiving v2.1 or later CLC Proposal Message,
>> such as max conns, max links negotiation, the decision of the final
>> value of max conns and max links should be made in this function.
>> And final check for server when receiving v2.1 or later CLC Confirm
>> Message should be done in smc_clc_v2x_features_confirm_check.
>>
>> For client, v2.x features' validation should be done in smc_clc_cli_
>> v2x_features_validate when receiving v2.1 or later CLC Accept Message,
>
> please use either clnt or client for the function. I know we have some functions with cli in them but they need to be cleaned up down the road.
>
> Thank you.
> - Jan
>
Get it, Thanks.