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net/smc: Add SMC-D Linkgroup diagnostic support
Deliver SMCD Linkgroup information via netlink based diagnostic interface. Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Guvenc Gulce
Jakub Kicinski
parent
5a7e09d58f
commit
8f9dde4bf2
4 changed files with 163 additions and 0 deletions
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@ -42,6 +42,7 @@ enum {
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SMC_NETLINK_GET_SYS_INFO = 1,
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SMC_NETLINK_GET_LGR_SMCR,
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SMC_NETLINK_GET_LINK_SMCR,
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SMC_NETLINK_GET_LGR_SMCD,
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};
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/* SMC_GENL_FAMILY top level attributes */
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@ -50,6 +51,7 @@ enum {
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SMC_GEN_SYS_INFO, /* nest */
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SMC_GEN_LGR_SMCR, /* nest */
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SMC_GEN_LINK_SMCR, /* nest */
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SMC_GEN_LGR_SMCD, /* nest */
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__SMC_GEN_MAX,
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SMC_GEN_MAX = __SMC_GEN_MAX - 1
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};
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@ -66,6 +68,15 @@ enum {
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SMC_NLA_SYS_MAX = __SMC_NLA_SYS_MAX - 1
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};
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/* SMC_NLA_LGR_V2 nested attributes */
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enum {
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SMC_NLA_LGR_V2_VER, /* u8 */
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SMC_NLA_LGR_V2_REL, /* u8 */
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SMC_NLA_LGR_V2_OS, /* u8 */
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SMC_NLA_LGR_V2_NEG_EID, /* string */
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SMC_NLA_LGR_V2_PEER_HOST, /* string */
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};
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/* SMC_GEN_LGR_SMCR attributes */
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enum {
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SMC_NLA_LGR_R_UNSPEC,
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@ -95,4 +106,20 @@ enum {
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__SMC_NLA_LINK_MAX,
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SMC_NLA_LINK_MAX = __SMC_NLA_LINK_MAX - 1
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};
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/* SMC_GEN_LGR_SMCD attributes */
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enum {
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SMC_NLA_LGR_D_UNSPEC,
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SMC_NLA_LGR_D_ID, /* u32 */
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SMC_NLA_LGR_D_GID, /* u64 */
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SMC_NLA_LGR_D_PEER_GID, /* u64 */
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SMC_NLA_LGR_D_VLAN_ID, /* u8 */
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SMC_NLA_LGR_D_CONNS_NUM, /* u32 */
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SMC_NLA_LGR_D_PNETID, /* string */
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SMC_NLA_LGR_D_CHID, /* u16 */
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SMC_NLA_LGR_D_PAD, /* flag */
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SMC_NLA_LGR_V2, /* nest */
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__SMC_NLA_LGR_D_MAX,
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SMC_NLA_LGR_D_MAX = __SMC_NLA_LGR_D_MAX - 1
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};
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#endif /* _UAPI_LINUX_SMC_H */
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@ -426,6 +426,130 @@ static void smc_nl_fill_lgr_list(struct smc_lgr_list *smc_lgr,
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cb_ctx->pos[0] = num;
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}
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static int smc_nl_fill_smcd_lgr(struct smc_link_group *lgr,
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struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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char smc_host[SMC_MAX_HOSTNAME_LEN + 1];
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char smc_pnet[SMC_MAX_PNETID_LEN + 1];
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char smc_eid[SMC_MAX_EID_LEN + 1];
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struct nlattr *v2_attrs;
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struct nlattr *attrs;
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void *nlh;
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nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
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&smc_gen_nl_family, NLM_F_MULTI,
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SMC_NETLINK_GET_LGR_SMCD);
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if (!nlh)
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goto errmsg;
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attrs = nla_nest_start(skb, SMC_GEN_LGR_SMCD);
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if (!attrs)
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goto errout;
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if (nla_put_u32(skb, SMC_NLA_LGR_D_ID, *((u32 *)&lgr->id)))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_GID, lgr->smcd->local_gid,
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SMC_NLA_LGR_D_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_PEER_GID, lgr->peer_gid,
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SMC_NLA_LGR_D_PAD))
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goto errattr;
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if (nla_put_u8(skb, SMC_NLA_LGR_D_VLAN_ID, lgr->vlan_id))
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goto errattr;
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if (nla_put_u32(skb, SMC_NLA_LGR_D_CONNS_NUM, lgr->conns_num))
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goto errattr;
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if (nla_put_u32(skb, SMC_NLA_LGR_D_CHID, smc_ism_get_chid(lgr->smcd)))
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goto errattr;
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snprintf(smc_pnet, sizeof(smc_pnet), "%s", lgr->smcd->pnetid);
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if (nla_put_string(skb, SMC_NLA_LGR_D_PNETID, smc_pnet))
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goto errattr;
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v2_attrs = nla_nest_start(skb, SMC_NLA_LGR_V2);
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if (!v2_attrs)
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goto errattr;
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if (nla_put_u8(skb, SMC_NLA_LGR_V2_VER, lgr->smc_version))
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goto errv2attr;
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if (nla_put_u8(skb, SMC_NLA_LGR_V2_REL, lgr->peer_smc_release))
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goto errv2attr;
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if (nla_put_u8(skb, SMC_NLA_LGR_V2_OS, lgr->peer_os))
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goto errv2attr;
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snprintf(smc_host, sizeof(smc_host), "%s", lgr->peer_hostname);
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if (nla_put_string(skb, SMC_NLA_LGR_V2_PEER_HOST, smc_host))
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goto errv2attr;
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snprintf(smc_eid, sizeof(smc_eid), "%s", lgr->negotiated_eid);
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if (nla_put_string(skb, SMC_NLA_LGR_V2_NEG_EID, smc_eid))
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goto errv2attr;
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nla_nest_end(skb, v2_attrs);
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nla_nest_end(skb, attrs);
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genlmsg_end(skb, nlh);
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return 0;
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errv2attr:
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nla_nest_cancel(skb, v2_attrs);
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errattr:
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nla_nest_cancel(skb, attrs);
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errout:
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genlmsg_cancel(skb, nlh);
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errmsg:
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return -EMSGSIZE;
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}
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static int smc_nl_handle_smcd_lgr(struct smcd_dev *dev,
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struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
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struct smc_link_group *lgr;
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int snum = cb_ctx->pos[1];
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int rc = 0, num = 0;
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spin_lock_bh(&dev->lgr_lock);
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list_for_each_entry(lgr, &dev->lgr_list, list) {
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if (!lgr->is_smcd)
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continue;
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if (num < snum)
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goto next;
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rc = smc_nl_fill_smcd_lgr(lgr, skb, cb);
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if (rc)
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goto errout;
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next:
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num++;
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}
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errout:
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spin_unlock_bh(&dev->lgr_lock);
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cb_ctx->pos[1] = num;
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return rc;
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}
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static int smc_nl_fill_smcd_dev(struct smcd_dev_list *dev_list,
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struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
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struct smcd_dev *smcd_dev;
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int snum = cb_ctx->pos[0];
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int rc = 0, num = 0;
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mutex_lock(&dev_list->mutex);
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list_for_each_entry(smcd_dev, &dev_list->list, list) {
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if (list_empty(&smcd_dev->lgr_list))
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continue;
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if (num < snum)
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goto next;
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rc = smc_nl_handle_smcd_lgr(smcd_dev, skb, cb);
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if (rc)
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goto errout;
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next:
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num++;
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}
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errout:
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mutex_unlock(&dev_list->mutex);
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cb_ctx->pos[0] = num;
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return rc;
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}
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int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb)
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{
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bool list_links = false;
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@ -442,6 +566,12 @@ int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb)
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return skb->len;
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}
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int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb)
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{
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smc_nl_fill_smcd_dev(&smcd_dev_list, skb, cb);
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return skb->len;
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}
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void smc_lgr_cleanup_early(struct smc_connection *conn)
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{
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struct smc_link_group *lgr = conn->lgr;
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@ -430,6 +430,7 @@ void smcr_link_down_cond_sched(struct smc_link *lnk);
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int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb);
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int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
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int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb);
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int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
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static inline struct smc_link_group *smc_get_lgr(struct smc_link *link)
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{
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@ -38,6 +38,11 @@ static const struct genl_ops smc_gen_nl_ops[] = {
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/* can be retrieved by unprivileged users */
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.dumpit = smcr_nl_get_link,
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},
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{
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.cmd = SMC_NETLINK_GET_LGR_SMCD,
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/* can be retrieved by unprivileged users */
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.dumpit = smcd_nl_get_lgr,
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},
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};
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static const struct nla_policy smc_gen_nl_policy[2] = {
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