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authorUrsula Braun <ubraun@linux.ibm.com>2020-09-26 12:44:28 +0200
committerDavid S. Miller <davem@davemloft.net>2020-09-28 15:19:03 -0700
commit8c3dca341aea885249e08856c4380300b75d2cf5 (patch)
tree70ecf1916b1c447c69372221d014a9711de74fae /net/smc/smc_clc.h
parentd70bf4f7a99e324b8ad515b90dadec447f8c4c75 (diff)
net/smc: build and send V2 CLC proposal
The new format of an SMCD V2 CLC proposal is introduced, and building and checking of SMCD V2 CLC proposals is adapted accordingly. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_clc.h')
-rw-r--r--net/smc/smc_clc.h73
1 files changed, 68 insertions, 5 deletions
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
index a3aa90bf4ad7..0157cffce62c 100644
--- a/net/smc/smc_clc.h
+++ b/net/smc/smc_clc.h
@@ -81,8 +81,6 @@ struct smc_clc_msg_local { /* header2 of clc messages */
u8 mac[6]; /* mac of ib_device port */
};
-#define SMC_CLC_MAX_V6_PREFIX 8
-
/* 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.
*/
@@ -91,6 +89,44 @@ struct smc_clc_ipv6_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[0][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 */
@@ -99,8 +135,15 @@ struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/
} __aligned(4);
struct smc_clc_msg_smcd { /* SMC-D GID information */
- u64 gid; /* ISM GID of requestor */
- u8 res[32];
+ 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[0];
};
struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */
@@ -109,11 +152,16 @@ struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */
__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;
};
@@ -190,13 +238,28 @@ static inline bool smcd_indicated(int smc_type)
static inline struct smc_clc_msg_smcd *
smc_get_clc_msg_smcd(struct smc_clc_msg_proposal *prop)
{
- if (smcd_indicated(prop->hdr.type) &&
+ 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));
+}
+
struct smcd_dev;
struct smc_init_info;