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Date: Sat, 7 Nov 2020 13:59:58 +0100
From: Karsten Graul <kgraul@...ux.ibm.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-s390@...r.kernel.org,
hca@...ux.ibm.com, raspl@...ux.ibm.com
Subject: [PATCH net-next v3 15/15] net/smc: Add support for obtaining system information
From: Guvenc Gulce <guvenc@...ux.ibm.com>
Add new netlink command to obtain system information
of the smc module.
Signed-off-by: Guvenc Gulce <guvenc@...ux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@...ux.ibm.com>
---
include/uapi/linux/smc.h | 1 +
include/uapi/linux/smc_diag.h | 18 +++++++++++
net/smc/smc_clc.c | 5 +++
net/smc/smc_clc.h | 1 +
net/smc/smc_core.c | 3 ++
net/smc/smc_core.h | 3 ++
net/smc/smc_diag.c | 61 +++++++++++++++++++++++++++++++++++
7 files changed, 92 insertions(+)
diff --git a/include/uapi/linux/smc.h b/include/uapi/linux/smc.h
index 736e8b98c8a5..04385a98037a 100644
--- a/include/uapi/linux/smc.h
+++ b/include/uapi/linux/smc.h
@@ -38,6 +38,7 @@ enum { /* SMC PNET Table commands */
#define SMC_LGR_ID_SIZE 4
#define SMC_MAX_HOSTNAME_LEN 32 /* Max length of hostname */
#define SMC_MAX_EID_LEN 32 /* Max length of eid */
+#define SMC_MAX_EID 8 /* Max number of eids */
#define SMC_MAX_PORTS 2 /* Max # of ports per ib device */
#define SMC_PCI_ID_STR_LEN 16 /* Max length of pci id string */
#endif /* _UAPI_LINUX_SMC_H */
diff --git a/include/uapi/linux/smc_diag.h b/include/uapi/linux/smc_diag.h
index 4c6332785533..7409e7a854df 100644
--- a/include/uapi/linux/smc_diag.h
+++ b/include/uapi/linux/smc_diag.h
@@ -75,6 +75,7 @@ enum {
enum {
SMC_DIAG_GET_LGR_INFO = SMC_DIAG_EXTS_PER_CMD,
SMC_DIAG_GET_DEV_INFO,
+ SMC_DIAG_GET_SYS_INFO,
__SMC_DIAG_EXT_MAX,
};
@@ -91,6 +92,11 @@ enum {
SMC_DIAG_DEV_INFO_SMCR,
};
+/* SMC_DIAG_GET_SYS_INFO command extensions */
+enum {
+ SMC_DIAG_SYS_INFO = 1,
+};
+
#define SMC_DIAG_MAX (__SMC_DIAG_MAX - 1)
#define SMC_DIAG_EXT_MAX (__SMC_DIAG_EXT_MAX - 1)
@@ -131,6 +137,18 @@ struct smc_diag_v2_lgr_info {
__u8 peer_hostname[SMC_MAX_HOSTNAME_LEN]; /* Peer host */
};
+
+struct smc_system_info {
+ __u8 smc_version; /* SMC Version */
+ __u8 smc_release; /* SMC Release */
+ __u8 ueid_count; /* Number of UEIDs */
+ __u8 smc_ism_is_v2; /* Is ISM SMC v2 capable */
+ __u32 reserved; /* Reserved for future use */
+ __u8 local_hostname[SMC_MAX_HOSTNAME_LEN]; /* Hostnames */
+ __u8 seid[SMC_MAX_EID_LEN]; /* System EID */
+ __u8 ueid[SMC_MAX_EID][SMC_MAX_EID_LEN]; /* User EIDs */
+};
+
/* SMC_DIAG_LINKINFO */
struct smc_diag_linkinfo {
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index 696d89c2dce4..e286dafd6e88 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -772,6 +772,11 @@ int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact,
return len > 0 ? 0 : len;
}
+void smc_clc_get_hostname(u8 **host)
+{
+ *host = &smc_hostname[0];
+}
+
void __init smc_clc_init(void)
{
struct new_utsname *u;
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
index e7ab05683bc9..9ed9eb3abe46 100644
--- a/net/smc/smc_clc.h
+++ b/net/smc/smc_clc.h
@@ -334,5 +334,6 @@ int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact,
int smc_clc_send_accept(struct smc_sock *smc, bool srv_first_contact,
u8 version);
void smc_clc_init(void) __init;
+void smc_clc_get_hostname(u8 **host);
#endif
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index d31e00f13473..34b77b46ce1d 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -225,6 +225,9 @@ static const struct smc_diag_ops smc_diag_ops = {
.get_chid = smc_ism_get_chid,
.get_ib_devices = smc_get_smc_ib_devices,
.is_ib_port_active = smc_ib_port_active,
+ .get_system_eid = smc_ism_get_system_eid,
+ .get_hostname = smc_clc_get_hostname,
+ .is_v2_capable = smc_ism_is_v2_capable,
};
const struct smc_diag_ops *smc_get_diag_ops(void)
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 0b175f5931ca..acbc41fb3a10 100644
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -28,6 +28,9 @@ struct smc_diag_ops {
u16 (*get_chid)(struct smcd_dev *smcd);
struct smc_ib_devices *(*get_ib_devices)(void);
bool (*is_ib_port_active)(struct smc_ib_device *smcibdev, u8 ibport);
+ void (*get_system_eid)(struct smcd_dev *smcd, u8 **eid);
+ void (*get_hostname)(u8 **host);
+ bool (*is_v2_capable)(void);
};
struct smc_lgr_list { /* list of link group definition */
diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c
index 725516f8d025..ab185f4e4412 100644
--- a/net/smc/smc_diag.c
+++ b/net/smc/smc_diag.c
@@ -652,6 +652,63 @@ static int smc_diag_prep_smcr_dev(struct smc_ib_devices *dev_list,
return rc;
}
+static int smc_diag_prep_sys_info(struct smcd_dev_list *dev_list,
+ struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct smc_diag_req_v2 *req)
+{
+ struct smc_diag_dump_ctx *cb_ctx = smc_dump_context(cb);
+ struct smc_system_info smc_sys_info;
+ int dummy = 0, rc = 0, num = 0;
+ struct smcd_dev *smcd_dev;
+ int snum = cb_ctx->pos[0];
+ struct nlmsghdr *nlh;
+ u8 *seid = NULL;
+ u8 *host = NULL;
+
+ nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, MAGIC_SEQ_V2_ACK,
+ cb->nlh->nlmsg_type, 0, NLM_F_MULTI);
+ if (!nlh)
+ return -EMSGSIZE;
+
+ if (snum > num)
+ goto errout;
+
+ memset(&smc_sys_info, 0, sizeof(smc_sys_info));
+ smc_sys_info.smc_ism_is_v2 = smc_diag_ops->is_v2_capable();
+ smc_sys_info.smc_version = SMC_V2;
+ smc_sys_info.smc_release = SMC_RELEASE;
+ smc_diag_ops->get_hostname(&host);
+
+ if (host)
+ memcpy(smc_sys_info.local_hostname, host,
+ sizeof(smc_sys_info.local_hostname));
+ mutex_lock(&dev_list->mutex);
+ smcd_dev = list_first_entry_or_null(&dev_list->list, struct smcd_dev, list);
+ if (smcd_dev)
+ smc_diag_ops->get_system_eid(smcd_dev, &seid);
+ mutex_unlock(&dev_list->mutex);
+
+ if (seid && smc_sys_info.smc_ism_is_v2)
+ memcpy(smc_sys_info.seid, seid, sizeof(smc_sys_info.seid));
+
+ /* Just a command place holder to signal back the command reply type */
+ if (nla_put(skb, SMC_DIAG_GET_SYS_INFO, sizeof(dummy), &dummy) < 0)
+ goto errout;
+
+ if (nla_put(skb, SMC_DIAG_SYS_INFO,
+ sizeof(smc_sys_info), &smc_sys_info) < 0)
+ goto errout;
+ nlmsg_end(skb, nlh);
+ num++;
+ cb_ctx->pos[0] = num;
+ return rc;
+
+errout:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
struct netlink_callback *cb,
const struct smc_diag_req *req)
@@ -760,6 +817,10 @@ static int smc_diag_dump_ext(struct sk_buff *skb, struct netlink_callback *cb)
if ((req->cmd_ext & (1 << (SMC_DIAG_DEV_INFO_SMCR - 1))))
smc_diag_prep_smcr_dev(smc_diag_ops->get_ib_devices(),
skb, cb, req);
+ } else if (req->cmd == SMC_DIAG_GET_SYS_INFO) {
+ if ((req->cmd_ext & (1 << (SMC_DIAG_SYS_INFO - 1))))
+ smc_diag_prep_sys_info(smc_diag_ops->get_smcd_devices(),
+ skb, cb, req);
}
return skb->len;
--
2.17.1
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