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Diffstat (limited to 'net/smc/smc_clc.h')
-rw-r--r--net/smc/smc_clc.h146
1 files changed, 111 insertions, 35 deletions
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
index 5fee545c9a10..767289925410 100644
--- a/net/smc/smc_clc.h
+++ b/net/smc/smc_clc.h
@@ -45,6 +45,9 @@
#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_MAXCONNERR 0x0303000a /* max connections negotiate failed */
+#define SMC_CLC_DECL_MAXLINKERR 0x0303000b /* max links 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 */
@@ -131,11 +134,19 @@ struct smc_clc_smcd_gid_chid {
*/
struct smc_clc_v2_extension {
- struct smc_clnt_opts_area_hdr hdr;
- u8 roce[16]; /* RoCEv2 GID */
- u8 reserved[16];
+ /* New members must be added within the struct_group() macro below. */
+ struct_group_tagged(smc_clc_v2_extension_fixed, fixed,
+ struct smc_clnt_opts_area_hdr hdr;
+ u8 roce[16]; /* RoCEv2 GID */
+ u8 max_conns;
+ u8 max_links;
+ __be16 feature_mask;
+ u8 reserved[12];
+ );
u8 user_eids[][SMC_MAX_EID_LEN];
};
+static_assert(offsetof(struct smc_clc_v2_extension, user_eids) == sizeof(struct smc_clc_v2_extension_fixed),
+ "struct member likely outside of struct_group_tagged()");
struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/
__be32 outgoing_subnet; /* subnet mask */
@@ -145,16 +156,23 @@ struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/
} __aligned(4);
struct smc_clc_msg_smcd { /* SMC-D GID information */
- struct smc_clc_smcd_gid_chid ism; /* ISM native GID+CHID of requestor */
+ struct smc_clc_smcd_gid_chid ism; /* ISM native GID+CHID of requester */
__be16 v2_ext_offset; /* SMC Version 2 Extension Offset */
- u8 reserved[28];
+ u8 vendor_oui[3]; /* vendor organizationally unique identifier */
+ u8 vendor_exp_options[5];
+ u8 reserved[20];
};
struct smc_clc_smcd_v2_extension {
- u8 system_eid[SMC_MAX_EID_LEN];
- u8 reserved[16];
+ /* New members must be added within the struct_group() macro below. */
+ struct_group_tagged(smc_clc_smcd_v2_extension_fixed, fixed,
+ u8 system_eid[SMC_MAX_EID_LEN];
+ u8 reserved[16];
+ );
struct smc_clc_smcd_gid_chid gidchid[];
};
+static_assert(offsetof(struct smc_clc_smcd_v2_extension, gidchid) == sizeof(struct smc_clc_smcd_v2_extension_fixed),
+ "struct member likely outside of struct_group_tagged()");
struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */
struct smc_clc_msg_hdr hdr;
@@ -164,16 +182,22 @@ struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */
#define SMC_CLC_MAX_V6_PREFIX 8
#define SMC_CLC_MAX_UEID 8
+#define SMCD_CLC_MAX_V2_GID_ENTRIES 8 /* max # of CHID-GID entries in CLC
+ * proposal SMC-Dv2 extension.
+ * each ISM device takes one entry and
+ * each Emulated-ISM takes two entries
+ */
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_v2_extension_fixed pclc_v2_ext;
u8 user_eids[SMC_CLC_MAX_UEID][SMC_MAX_EID_LEN];
- 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_smcd_v2_extension_fixed pclc_smcd_v2_ext;
+ struct smc_clc_smcd_gid_chid
+ pclc_gidchids[SMCD_CLC_MAX_V2_GID_ENTRIES];
struct smc_clc_msg_trail pclc_trl;
};
@@ -197,8 +221,8 @@ struct smcr_clc_msg_accept_confirm { /* SMCR accept/confirm */
} __packed;
struct smcd_clc_msg_accept_confirm_common { /* SMCD accept/confirm */
- u64 gid; /* Sender GID */
- u64 token; /* DMB token */
+ __be64 gid; /* Sender GID */
+ __be64 token; /* DMB token */
u8 dmbe_idx; /* DMBE index */
#if defined(__BIG_ENDIAN_BITFIELD)
u8 dmbe_size : 4, /* buf size (compressed) */
@@ -231,8 +255,24 @@ struct smc_clc_first_contact_ext {
u8 hostname[SMC_MAX_HOSTNAME_LEN];
};
+struct smc_clc_first_contact_ext_v2x {
+ struct smc_clc_first_contact_ext fce_v2_base;
+ union {
+ struct {
+ u8 max_conns; /* for SMC-R only */
+ u8 max_links; /* for SMC-R only */
+ };
+ u8 reserved3[2]; /* for SMC-D only */
+ };
+ __be16 feature_mask;
+ __be32 vendor_exp_options;
+ u8 reserved4[8];
+} __packed; /* format defined in
+ * IBM Shared Memory Communications Version 2 (Third Edition)
+ * (https://www.ibm.com/support/pages/node/7009315)
+ */
+
struct smc_clc_fce_gid_ext {
- u8 reserved[16];
u8 gid_cnt;
u8 reserved2[3];
u8 gid[][SMC_GID_SIZE];
@@ -241,28 +281,21 @@ struct smc_clc_fce_gid_ext {
struct smc_clc_msg_accept_confirm { /* clc accept / confirm message */
struct smc_clc_msg_hdr hdr;
union {
- struct smcr_clc_msg_accept_confirm r0; /* SMC-R */
- struct { /* SMC-D */
- struct smcd_clc_msg_accept_confirm_common d0;
- u32 reserved5[3];
- };
- };
-} __packed; /* format defined in RFC7609 */
-
-struct smc_clc_msg_accept_confirm_v2 { /* clc accept / confirm message */
- struct smc_clc_msg_hdr hdr;
- union {
struct { /* SMC-R */
struct smcr_clc_msg_accept_confirm r0;
- u8 eid[SMC_MAX_EID_LEN];
- u8 reserved6[8];
- } r1;
+ struct { /* v2 only */
+ u8 eid[SMC_MAX_EID_LEN];
+ u8 reserved6[8];
+ } __packed r1;
+ };
struct { /* SMC-D */
struct smcd_clc_msg_accept_confirm_common d0;
- __be16 chid;
- u8 eid[SMC_MAX_EID_LEN];
- u8 reserved5[8];
- } d1;
+ struct { /* v2 only, but 12 bytes reserved in v1 */
+ __be16 chid;
+ u8 eid[SMC_MAX_EID_LEN];
+ __be64 gid_ext;
+ } __packed d1;
+ };
};
};
@@ -303,8 +336,12 @@ struct smc_clc_msg_decline_v2 { /* clc decline message */
static inline struct smc_clc_msg_proposal_prefix *
smc_clc_proposal_get_prefix(struct smc_clc_msg_proposal *pclc)
{
+ u16 offset = ntohs(pclc->iparea_offset);
+
+ if (offset > sizeof(struct smc_clc_msg_smcd))
+ return NULL;
return (struct smc_clc_msg_proposal_prefix *)
- ((u8 *)pclc + sizeof(*pclc) + ntohs(pclc->iparea_offset));
+ ((u8 *)pclc + sizeof(*pclc) + offset);
}
static inline bool smcr_indicated(int smc_type)
@@ -343,8 +380,14 @@ 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);
+ u16 max_offset;
- if (!prop_smcd || !ntohs(prop_smcd->v2_ext_offset))
+ max_offset = offsetof(struct smc_clc_msg_proposal_area, pclc_v2_ext) -
+ offsetof(struct smc_clc_msg_proposal_area, pclc_smcd) -
+ offsetofend(struct smc_clc_msg_smcd, v2_ext_offset);
+
+ if (!prop_smcd || !ntohs(prop_smcd->v2_ext_offset) ||
+ ntohs(prop_smcd->v2_ext_offset) > max_offset)
return NULL;
return (struct smc_clc_v2_extension *)
@@ -357,9 +400,15 @@ smc_get_clc_v2_ext(struct smc_clc_msg_proposal *prop)
static inline struct smc_clc_smcd_v2_extension *
smc_get_clc_smcd_v2_ext(struct smc_clc_v2_extension *prop_v2ext)
{
+ u16 max_offset = offsetof(struct smc_clc_msg_proposal_area, pclc_smcd_v2_ext) -
+ offsetof(struct smc_clc_msg_proposal_area, pclc_v2_ext) -
+ offsetof(struct smc_clc_v2_extension, hdr) -
+ offsetofend(struct smc_clnt_opts_area_hdr, smcd_v2_ext_offset);
+
if (!prop_v2ext)
return NULL;
- if (!ntohs(prop_v2ext->hdr.smcd_v2_ext_offset))
+ if (!ntohs(prop_v2ext->hdr.smcd_v2_ext_offset) ||
+ ntohs(prop_v2ext->hdr.smcd_v2_ext_offset) > max_offset)
return NULL;
return (struct smc_clc_smcd_v2_extension *)
@@ -370,6 +419,26 @@ 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 *clc,
+ bool is_smcd)
+{
+ int clc_v2_len;
+
+ if (clc->hdr.version == SMC_V1 ||
+ !(clc->hdr.typev2 & SMC_FIRST_CONTACT_MASK))
+ return NULL;
+
+ if (is_smcd)
+ clc_v2_len =
+ offsetofend(struct smc_clc_msg_accept_confirm, d1);
+ else
+ clc_v2_len =
+ offsetofend(struct smc_clc_msg_accept_confirm, r1);
+
+ return (struct smc_clc_first_contact_ext *)(((u8 *)clc) + clc_v2_len);
+}
+
struct smcd_dev;
struct smc_init_info;
@@ -382,7 +451,14 @@ 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);
+int smc_clc_srv_v2x_features_validate(struct smc_sock *smc,
+ struct smc_clc_msg_proposal *pclc,
+ struct smc_init_info *ini);
+int smc_clc_clnt_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);
generated by cgit (git 2.34.1) at 2025-12-25 11:38:29 +0000