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net/smc: add netlink support for SMC-Rv2

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Implement the netlink support for SMC-Rv2 related attributes that are
provided to user space.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Graul
2021-10-16 11:37:51 +02:00
committed by David S. Miller
parent b4ba4652b3
commit b0539f5edd
2 changed files with 88 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

98
net/smc/smc_core.c
View File

@@ -244,6 +244,8 @@ int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb)
goto errattr;
if (nla_put_u8(skb, SMC_NLA_SYS_IS_ISM_V2, smc_ism_is_v2_capable()))
goto errattr;
if (nla_put_u8(skb, SMC_NLA_SYS_IS_SMCR_V2, true))
goto errattr;
smc_clc_get_hostname(&host);
if (host) {
memcpy(hostname, host, SMC_MAX_HOSTNAME_LEN);
@@ -271,12 +273,65 @@ errmsg:
return skb->len;
}
/* Fill SMC_NLA_LGR_D_V2_COMMON/SMC_NLA_LGR_R_V2_COMMON nested attributes */
static int smc_nl_fill_lgr_v2_common(struct smc_link_group *lgr,
struct sk_buff *skb,
struct netlink_callback *cb,
struct nlattr *v2_attrs)
{
char smc_host[SMC_MAX_HOSTNAME_LEN + 1];
char smc_eid[SMC_MAX_EID_LEN + 1];
if (nla_put_u8(skb, SMC_NLA_LGR_V2_VER, lgr->smc_version))
goto errv2attr;
if (nla_put_u8(skb, SMC_NLA_LGR_V2_REL, lgr->peer_smc_release))
goto errv2attr;
if (nla_put_u8(skb, SMC_NLA_LGR_V2_OS, lgr->peer_os))
goto errv2attr;
memcpy(smc_host, lgr->peer_hostname, SMC_MAX_HOSTNAME_LEN);
smc_host[SMC_MAX_HOSTNAME_LEN] = 0;
if (nla_put_string(skb, SMC_NLA_LGR_V2_PEER_HOST, smc_host))
goto errv2attr;
memcpy(smc_eid, lgr->negotiated_eid, SMC_MAX_EID_LEN);
smc_eid[SMC_MAX_EID_LEN] = 0;
if (nla_put_string(skb, SMC_NLA_LGR_V2_NEG_EID, smc_eid))
goto errv2attr;
nla_nest_end(skb, v2_attrs);
return 0;
errv2attr:
nla_nest_cancel(skb, v2_attrs);
return -EMSGSIZE;
}
static int smc_nl_fill_smcr_lgr_v2(struct smc_link_group *lgr,
struct sk_buff *skb,
struct netlink_callback *cb)
{
struct nlattr *v2_attrs;
v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_R_V2);
if (!v2_attrs)
goto errattr;
if (nla_put_u8(skb, SMC_NLA_LGR_R_V2_DIRECT, !lgr->uses_gateway))
goto errv2attr;
nla_nest_end(skb, v2_attrs);
return 0;
errv2attr:
nla_nest_cancel(skb, v2_attrs);
errattr:
return -EMSGSIZE;
}
static int smc_nl_fill_lgr(struct smc_link_group *lgr,
struct sk_buff *skb,
struct netlink_callback *cb)
{
char smc_target[SMC_MAX_PNETID_LEN + 1];
struct nlattr *attrs;
struct nlattr *attrs, *v2_attrs;
attrs = nla_nest_start(skb, SMC_GEN_LGR_SMCR);
if (!attrs)
@@ -296,6 +351,15 @@ static int smc_nl_fill_lgr(struct smc_link_group *lgr,
smc_target[SMC_MAX_PNETID_LEN] = 0;
if (nla_put_string(skb, SMC_NLA_LGR_R_PNETID, smc_target))
goto errattr;
if (lgr->smc_version > SMC_V1) {
v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_R_V2_COMMON);
if (!v2_attrs)
goto errattr;
if (smc_nl_fill_lgr_v2_common(lgr, skb, cb, v2_attrs))
goto errattr;
if (smc_nl_fill_smcr_lgr_v2(lgr, skb, cb))
goto errattr;
}
nla_nest_end(skb, attrs);
return 0;
@@ -428,10 +492,7 @@ static int smc_nl_fill_smcd_lgr(struct smc_link_group *lgr,
struct sk_buff *skb,
struct netlink_callback *cb)
{
char smc_host[SMC_MAX_HOSTNAME_LEN + 1];
char smc_pnet[SMC_MAX_PNETID_LEN + 1];
char smc_eid[SMC_MAX_EID_LEN + 1];
struct nlattr *v2_attrs;
struct nlattr *attrs;
void *nlh;
@@ -463,32 +524,19 @@ static int smc_nl_fill_smcd_lgr(struct smc_link_group *lgr,
smc_pnet[SMC_MAX_PNETID_LEN] = 0;
if (nla_put_string(skb, SMC_NLA_LGR_D_PNETID, smc_pnet))
goto errattr;
if (lgr->smc_version > SMC_V1) {
struct nlattr *v2_attrs;
v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_V2);
if (!v2_attrs)
goto errattr;
if (nla_put_u8(skb, SMC_NLA_LGR_V2_VER, lgr->smc_version))
goto errv2attr;
if (nla_put_u8(skb, SMC_NLA_LGR_V2_REL, lgr->peer_smc_release))
goto errv2attr;
if (nla_put_u8(skb, SMC_NLA_LGR_V2_OS, lgr->peer_os))
goto errv2attr;
memcpy(smc_host, lgr->peer_hostname, SMC_MAX_HOSTNAME_LEN);
smc_host[SMC_MAX_HOSTNAME_LEN] = 0;
if (nla_put_string(skb, SMC_NLA_LGR_V2_PEER_HOST, smc_host))
goto errv2attr;
memcpy(smc_eid, lgr->negotiated_eid, SMC_MAX_EID_LEN);
smc_eid[SMC_MAX_EID_LEN] = 0;
if (nla_put_string(skb, SMC_NLA_LGR_V2_NEG_EID, smc_eid))
goto errv2attr;
nla_nest_end(skb, v2_attrs);
v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_D_V2_COMMON);
if (!v2_attrs)
goto errattr;
if (smc_nl_fill_lgr_v2_common(lgr, skb, cb, v2_attrs))
goto errattr;
}
nla_nest_end(skb, attrs);
genlmsg_end(skb, nlh);
return 0;
errv2attr:
nla_nest_cancel(skb, v2_attrs);
errattr:
nla_nest_cancel(skb, attrs);
errout: