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2024-09-20 cf4ce59b3b70238352c7f1729f0f7223214828ad 
 kernel/net/smc/smc_clc.h
....@@ -22,27 +22,39 @@
2222 #define SMC_CLC_CONFIRM		0x03
2323 #define SMC_CLC_DECLINE		0x04
2424 
25
-#define SMC_CLC_V1		0x1		/* SMC version                */
2625 #define SMC_TYPE_R		0		/* SMC-R only		      */
2726 #define SMC_TYPE_D		1		/* SMC-D only		      */
27
+#define SMC_TYPE_N		2		/* neither SMC-R nor SMC-D    */
2828 #define SMC_TYPE_B		3		/* SMC-R and SMC-D	      */
2929 #define CLC_WAIT_TIME		(6 * HZ)	/* max. wait time on clcsock  */
30
+#define CLC_WAIT_TIME_SHORT	HZ		/* short wait time on clcsock */
3031 #define SMC_CLC_DECL_MEM	0x01010000  /* insufficient memory resources  */
3132 #define SMC_CLC_DECL_TIMEOUT_CL	0x02010000  /* timeout w4 QP confirm link     */
3233 #define SMC_CLC_DECL_TIMEOUT_AL	0x02020000  /* timeout w4 QP add link	      */
3334 #define SMC_CLC_DECL_CNFERR	0x03000000  /* configuration error            */
3435 #define SMC_CLC_DECL_PEERNOSMC	0x03010000  /* peer did not indicate SMC      */
3536 #define SMC_CLC_DECL_IPSEC	0x03020000  /* IPsec usage		      */
36
-#define SMC_CLC_DECL_NOSMCDEV	0x03030000  /* no SMC device found	      */
37
+#define SMC_CLC_DECL_NOSMCDEV	0x03030000  /* no SMC device found (R or D)   */
38
+#define SMC_CLC_DECL_NOSMCDDEV	0x03030001  /* no SMC-D device found	      */
39
+#define SMC_CLC_DECL_NOSMCRDEV	0x03030002  /* no SMC-R device found	      */
3740 #define SMC_CLC_DECL_MODEUNSUPP	0x03040000  /* smc modes do not match (R or D)*/
3841 #define SMC_CLC_DECL_RMBE_EC	0x03050000  /* peer has eyecatcher in RMBE    */
3942 #define SMC_CLC_DECL_OPTUNSUPP	0x03060000  /* fastopen sockopt not supported */
43
+#define SMC_CLC_DECL_DIFFPREFIX	0x03070000  /* IP prefix / subnet mismatch    */
44
+#define SMC_CLC_DECL_GETVLANERR	0x03080000  /* err to get vlan id of ip device*/
45
+#define SMC_CLC_DECL_ISMVLANERR	0x03090000  /* err to reg vlan id on ism dev  */
46
+#define SMC_CLC_DECL_NOACTLINK	0x030a0000  /* no active smc-r link in lgr    */
47
+#define SMC_CLC_DECL_NOSRVLINK	0x030b0000  /* SMC-R link from srv not found  */
48
+#define SMC_CLC_DECL_VERSMISMAT	0x030c0000  /* SMC version mismatch	      */
49
+#define SMC_CLC_DECL_MAX_DMB	0x030d0000  /* SMC-D DMB limit exceeded       */
4050 #define SMC_CLC_DECL_SYNCERR	0x04000000  /* synchronization error          */
4151 #define SMC_CLC_DECL_PEERDECL	0x05000000  /* peer declined during handshake */
42
-#define SMC_CLC_DECL_INTERR	0x99990000  /* internal error                 */
43
-#define SMC_CLC_DECL_ERR_RTOK	0x99990001  /*	 rtoken handling failed       */
44
-#define SMC_CLC_DECL_ERR_RDYLNK	0x99990002  /*	 ib ready link failed	      */
45
-#define SMC_CLC_DECL_ERR_REGRMB	0x99990003  /*	 reg rmb failed		      */
52
+#define SMC_CLC_DECL_INTERR	0x09990000  /* internal error		      */
53
+#define SMC_CLC_DECL_ERR_RTOK	0x09990001  /*	 rtoken handling failed       */
54
+#define SMC_CLC_DECL_ERR_RDYLNK	0x09990002  /*	 ib ready link failed	      */
55
+#define SMC_CLC_DECL_ERR_REGRMB	0x09990003  /*	 reg rmb failed		      */
56
+
57
+#define SMC_FIRST_CONTACT_MASK	0b10	/* first contact bit within typev2 */
4658 
4759 struct smc_clc_msg_hdr {	/* header1 of clc messages */
4860 	u8 eyecatcher[4];	/* eye catcher */
....@@ -50,13 +62,11 @@
5062 	__be16 length;
5163 #if defined(__BIG_ENDIAN_BITFIELD)
5264 	u8 version : 4,
53
-	   flag    : 1,
54
-	   rsvd	   : 1,
55
-	   path	   : 2;
65
+	   typev2  : 2,
66
+	   typev1  : 2;
5667 #elif defined(__LITTLE_ENDIAN_BITFIELD)
57
-	u8 path    : 2,
58
-	   rsvd    : 1,
59
-	   flag    : 1,
68
+	u8 typev1  : 2,
69
+	   typev2  : 2,
6070 	   version : 4;
6171 #endif
6272 } __packed;			/* format defined in RFC7609 */
....@@ -71,8 +81,6 @@
7181 	u8 mac[6];		/* mac of ib_device port */
7282 };
7383 
74
-#define SMC_CLC_MAX_V6_PREFIX	8
75
-
7684 /* Struct would be 4 byte aligned, but it is used in an array that is sent
7785  * to peers and must conform to RFC7609, hence we need to use packed here.
7886  */
....@@ -80,6 +88,44 @@
8088 	struct in6_addr prefix;
8189 	u8 prefix_len;
8290 } __packed;			/* format defined in RFC7609 */
91
+
92
+#if defined(__BIG_ENDIAN_BITFIELD)
93
+struct smc_clc_v2_flag {
94
+	u8 release : 4,
95
+	   rsvd    : 3,
96
+	   seid    : 1;
97
+};
98
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
99
+struct smc_clc_v2_flag {
100
+	u8 seid   : 1,
101
+	rsvd      : 3,
102
+	release   : 4;
103
+};
104
+#endif
105
+
106
+struct smc_clnt_opts_area_hdr {
107
+	u8 eid_cnt;		/* number of user defined EIDs */
108
+	u8 ism_gid_cnt;		/* number of ISMv2 GIDs */
109
+	u8 reserved1;
110
+	struct smc_clc_v2_flag flag;
111
+	u8 reserved2[2];
112
+	__be16 smcd_v2_ext_offset; /* SMC-Dv2 Extension Offset */
113
+};
114
+
115
+struct smc_clc_smcd_gid_chid {
116
+	__be64 gid;		/* ISM GID */
117
+	__be16 chid;		/* ISMv2 CHID */
118
+} __packed;		/* format defined in
119
+			 * IBM Shared Memory Communications Version 2
120
+			 * (https://www.ibm.com/support/pages/node/6326337)
121
+			 */
122
+
123
+struct smc_clc_v2_extension {
124
+	struct smc_clnt_opts_area_hdr hdr;
125
+	u8 roce[16];		/* RoCEv2 GID */
126
+	u8 reserved[16];
127
+	u8 user_eids[][SMC_MAX_EID_LEN];
128
+};
83129 
84130 struct smc_clc_msg_proposal_prefix {	/* prefix part of clc proposal message*/
85131 	__be32 outgoing_subnet;	/* subnet mask */
....@@ -89,8 +135,15 @@
89135 } __aligned(4);
90136 
91137 struct smc_clc_msg_smcd {	/* SMC-D GID information */
92
-	u64 gid;		/* ISM GID of requestor */
93
-	u8 res[32];
138
+	struct smc_clc_smcd_gid_chid ism; /* ISM native GID+CHID of requestor */
139
+	__be16 v2_ext_offset;	/* SMC Version 2 Extension Offset */
140
+	u8 reserved[28];
141
+};
142
+
143
+struct smc_clc_smcd_v2_extension {
144
+	u8 system_eid[SMC_MAX_EID_LEN];
145
+	u8 reserved[16];
146
+	struct smc_clc_smcd_gid_chid gidchid[];
94147 };
95148 
96149 struct smc_clc_msg_proposal {	/* clc proposal message sent by Linux */
....@@ -99,64 +152,107 @@
99152 	__be16 iparea_offset;	/* offset to IP address information area */
100153 } __aligned(4);
101154 
102
-#define SMC_CLC_PROPOSAL_MAX_OFFSET	0x28
103
-#define SMC_CLC_PROPOSAL_MAX_PREFIX	(SMC_CLC_MAX_V6_PREFIX * \
104
-					 sizeof(struct smc_clc_ipv6_prefix))
105
-#define SMC_CLC_MAX_LEN		(sizeof(struct smc_clc_msg_proposal) + \
106
-				 SMC_CLC_PROPOSAL_MAX_OFFSET + \
107
-				 sizeof(struct smc_clc_msg_proposal_prefix) + \
108
-				 SMC_CLC_PROPOSAL_MAX_PREFIX + \
109
-				 sizeof(struct smc_clc_msg_trail))
155
+#define SMC_CLC_MAX_V6_PREFIX		8
156
+
157
+struct smc_clc_msg_proposal_area {
158
+	struct smc_clc_msg_proposal		pclc_base;
159
+	struct smc_clc_msg_smcd			pclc_smcd;
160
+	struct smc_clc_msg_proposal_prefix	pclc_prfx;
161
+	struct smc_clc_ipv6_prefix	pclc_prfx_ipv6[SMC_CLC_MAX_V6_PREFIX];
162
+	struct smc_clc_v2_extension		pclc_v2_ext;
163
+	struct smc_clc_smcd_v2_extension	pclc_smcd_v2_ext;
164
+	struct smc_clc_smcd_gid_chid		pclc_gidchids[SMC_MAX_ISM_DEVS];
165
+	struct smc_clc_msg_trail		pclc_trl;
166
+};
167
+
168
+struct smcr_clc_msg_accept_confirm {	/* SMCR accept/confirm */
169
+	struct smc_clc_msg_local lcl;
170
+	u8 qpn[3];			/* QP number */
171
+	__be32 rmb_rkey;		/* RMB rkey */
172
+	u8 rmbe_idx;			/* Index of RMBE in RMB */
173
+	__be32 rmbe_alert_token;	/* unique connection id */
174
+ #if defined(__BIG_ENDIAN_BITFIELD)
175
+	u8 rmbe_size : 4,		/* buf size (compressed) */
176
+	   qp_mtu   : 4;		/* QP mtu */
177
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
178
+	u8 qp_mtu   : 4,
179
+	   rmbe_size : 4;
180
+#endif
181
+	u8 reserved;
182
+	__be64 rmb_dma_addr;	/* RMB virtual address */
183
+	u8 reserved2;
184
+	u8 psn[3];		/* packet sequence number */
185
+} __packed;
186
+
187
+struct smcd_clc_msg_accept_confirm_common {	/* SMCD accept/confirm */
188
+	u64 gid;		/* Sender GID */
189
+	u64 token;		/* DMB token */
190
+	u8 dmbe_idx;		/* DMBE index */
191
+#if defined(__BIG_ENDIAN_BITFIELD)
192
+	u8 dmbe_size : 4,	/* buf size (compressed) */
193
+	   reserved3 : 4;
194
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
195
+	u8 reserved3 : 4,
196
+	   dmbe_size : 4;
197
+#endif
198
+	u16 reserved4;
199
+	__be32 linkid;		/* Link identifier */
200
+} __packed;
201
+
202
+#define SMC_CLC_OS_ZOS		1
203
+#define SMC_CLC_OS_LINUX	2
204
+#define SMC_CLC_OS_AIX		3
205
+
206
+struct smc_clc_first_contact_ext {
207
+	u8 reserved1;
208
+#if defined(__BIG_ENDIAN_BITFIELD)
209
+	u8 os_type : 4,
210
+	   release : 4;
211
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
212
+	u8 release : 4,
213
+	   os_type : 4;
214
+#endif
215
+	u8 reserved2[2];
216
+	u8 hostname[SMC_MAX_HOSTNAME_LEN];
217
+};
110218 
111219 struct smc_clc_msg_accept_confirm {	/* clc accept / confirm message */
112220 	struct smc_clc_msg_hdr hdr;
113221 	union {
114
-		struct { /* SMC-R */
115
-			struct smc_clc_msg_local lcl;
116
-			u8 qpn[3];		/* QP number */
117
-			__be32 rmb_rkey;	/* RMB rkey */
118
-			u8 rmbe_idx;		/* Index of RMBE in RMB */
119
-			__be32 rmbe_alert_token;/* unique connection id */
120
-#if defined(__BIG_ENDIAN_BITFIELD)
121
-			u8 rmbe_size : 4,	/* buf size (compressed) */
122
-			   qp_mtu   : 4;	/* QP mtu */
123
-#elif defined(__LITTLE_ENDIAN_BITFIELD)
124
-			u8 qp_mtu   : 4,
125
-			   rmbe_size : 4;
126
-#endif
127
-			u8 reserved;
128
-			__be64 rmb_dma_addr;	/* RMB virtual address */
129
-			u8 reserved2;
130
-			u8 psn[3];		/* packet sequence number */
131
-			struct smc_clc_msg_trail smcr_trl;
132
-						/* eye catcher "SMCR" EBCDIC */
133
-		} __packed;
222
+		struct smcr_clc_msg_accept_confirm r0; /* SMC-R */
134223 		struct { /* SMC-D */
135
-			u64 gid;		/* Sender GID */
136
-			u64 token;		/* DMB token */
137
-			u8 dmbe_idx;		/* DMBE index */
138
-#if defined(__BIG_ENDIAN_BITFIELD)
139
-			u8 dmbe_size : 4,	/* buf size (compressed) */
140
-			   reserved3 : 4;
141
-#elif defined(__LITTLE_ENDIAN_BITFIELD)
142
-			u8 reserved3 : 4,
143
-			   dmbe_size : 4;
144
-#endif
145
-			u16 reserved4;
146
-			u32 linkid;		/* Link identifier */
224
+			struct smcd_clc_msg_accept_confirm_common d0;
147225 			u32 reserved5[3];
148
-			struct smc_clc_msg_trail smcd_trl;
149
-						/* eye catcher "SMCD" EBCDIC */
150
-		} __packed;
226
+		};
151227 	};
152228 } __packed;			/* format defined in RFC7609 */
229
+
230
+struct smc_clc_msg_accept_confirm_v2 {	/* clc accept / confirm message */
231
+	struct smc_clc_msg_hdr hdr;
232
+	union {
233
+		struct smcr_clc_msg_accept_confirm r0; /* SMC-R */
234
+		struct { /* SMC-D */
235
+			struct smcd_clc_msg_accept_confirm_common d0;
236
+			__be16 chid;
237
+			u8 eid[SMC_MAX_EID_LEN];
238
+			u8 reserved5[8];
239
+		};
240
+	};
241
+};
153242 
154243 struct smc_clc_msg_decline {	/* clc decline message */
155244 	struct smc_clc_msg_hdr hdr;
156245 	u8 id_for_peer[SMC_SYSTEMID_LEN]; /* sender peer_id */
157246 	__be32 peer_diagnosis;	/* diagnosis information */
158
-	u8 reserved2[4];
159
-	struct smc_clc_msg_trail trl; /* eye catcher "SMCR" EBCDIC */
247
+#if defined(__BIG_ENDIAN_BITFIELD)
248
+	u8 os_type  : 4,
249
+	   reserved : 4;
250
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
251
+	u8 reserved : 4,
252
+	   os_type  : 4;
253
+#endif
254
+	u8 reserved2[3];
255
+	struct smc_clc_msg_trail trl; /* eye catcher "SMCD" or "SMCR" EBCDIC */
160256 } __aligned(4);
161257 
162258 /* determine start of the prefix area within the proposal message */
....@@ -167,27 +263,71 @@
167263 	       ((u8 *)pclc + sizeof(*pclc) + ntohs(pclc->iparea_offset));
168264 }
169265 
266
+static inline bool smcr_indicated(int smc_type)
267
+{
268
+	return smc_type == SMC_TYPE_R || smc_type == SMC_TYPE_B;
269
+}
270
+
271
+static inline bool smcd_indicated(int smc_type)
272
+{
273
+	return smc_type == SMC_TYPE_D || smc_type == SMC_TYPE_B;
274
+}
275
+
170276 /* get SMC-D info from proposal message */
171277 static inline struct smc_clc_msg_smcd *
172278 smc_get_clc_msg_smcd(struct smc_clc_msg_proposal *prop)
173279 {
174
-	if (ntohs(prop->iparea_offset) != sizeof(struct smc_clc_msg_smcd))
280
+	if (smcd_indicated(prop->hdr.typev1) &&
281
+	    ntohs(prop->iparea_offset) != sizeof(struct smc_clc_msg_smcd))
175282 		return NULL;
176283 
177284 	return (struct smc_clc_msg_smcd *)(prop + 1);
178285 }
179286 
287
+static inline struct smc_clc_v2_extension *
288
+smc_get_clc_v2_ext(struct smc_clc_msg_proposal *prop)
289
+{
290
+	struct smc_clc_msg_smcd *prop_smcd = smc_get_clc_msg_smcd(prop);
291
+
292
+	if (!prop_smcd || !ntohs(prop_smcd->v2_ext_offset))
293
+		return NULL;
294
+
295
+	return (struct smc_clc_v2_extension *)
296
+	       ((u8 *)prop_smcd +
297
+	       offsetof(struct smc_clc_msg_smcd, v2_ext_offset) +
298
+	       sizeof(prop_smcd->v2_ext_offset) +
299
+	       ntohs(prop_smcd->v2_ext_offset));
300
+}
301
+
302
+static inline struct smc_clc_smcd_v2_extension *
303
+smc_get_clc_smcd_v2_ext(struct smc_clc_v2_extension *prop_v2ext)
304
+{
305
+	if (!prop_v2ext)
306
+		return NULL;
307
+	if (!ntohs(prop_v2ext->hdr.smcd_v2_ext_offset))
308
+		return NULL;
309
+
310
+	return (struct smc_clc_smcd_v2_extension *)
311
+		((u8 *)prop_v2ext +
312
+		 offsetof(struct smc_clc_v2_extension, hdr) +
313
+		 offsetof(struct smc_clnt_opts_area_hdr, smcd_v2_ext_offset) +
314
+		 sizeof(prop_v2ext->hdr.smcd_v2_ext_offset) +
315
+		 ntohs(prop_v2ext->hdr.smcd_v2_ext_offset));
316
+}
317
+
180318 struct smcd_dev;
319
+struct smc_init_info;
181320 
182321 int smc_clc_prfx_match(struct socket *clcsock,
183322 		       struct smc_clc_msg_proposal_prefix *prop);
184323 int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
185
-		     u8 expected_type);
186
-int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info);
187
-int smc_clc_send_proposal(struct smc_sock *smc, int smc_type,
188
-			  struct smc_ib_device *smcibdev, u8 ibport, u8 gid[],
189
-			  struct smcd_dev *ismdev);
190
-int smc_clc_send_confirm(struct smc_sock *smc);
191
-int smc_clc_send_accept(struct smc_sock *smc, int srv_first_contact);
324
+		     u8 expected_type, unsigned long timeout);
325
+int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info, u8 version);
326
+int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini);
327
+int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact,
328
+			 u8 version);
329
+int smc_clc_send_accept(struct smc_sock *smc, bool srv_first_contact,
330
+			u8 version);
331
+void smc_clc_init(void) __init;
192332 
193333 #endif