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Message-Id: <20210616145258.2381446-3-kgraul@linux.ibm.com>
Date: Wed, 16 Jun 2021 16:52:56 +0200
From: Karsten Graul <kgraul@...ux.ibm.com>
To: David Miller <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Heiko Carstens <hca@...ux.ibm.com>,
Stefan Raspl <raspl@...ux.ibm.com>, netdev@...r.kernel.org,
linux-s390@...r.kernel.org, guvenc@...ux.ibm.com
Subject: [PATCH net-next v2 2/4] net/smc: Add netlink support for SMC statistics
From: Guvenc Gulce <guvenc@...ux.ibm.com>
Add the netlink function which collects the statistics information and
delivers it to the userspace.
Signed-off-by: Guvenc Gulce <guvenc@...ux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@...ux.ibm.com>
---
include/uapi/linux/smc.h | 69 ++++++++++
net/smc/smc_netlink.c | 6 +
net/smc/smc_stats.c | 279 +++++++++++++++++++++++++++++++++++++++
net/smc/smc_stats.h | 1 +
4 files changed, 355 insertions(+)
diff --git a/include/uapi/linux/smc.h b/include/uapi/linux/smc.h
index 3e68da07fba2..f32f11b30963 100644
--- a/include/uapi/linux/smc.h
+++ b/include/uapi/linux/smc.h
@@ -47,6 +47,7 @@ enum {
SMC_NETLINK_GET_LGR_SMCD,
SMC_NETLINK_GET_DEV_SMCD,
SMC_NETLINK_GET_DEV_SMCR,
+ SMC_NETLINK_GET_STATS,
};
/* SMC_GENL_FAMILY top level attributes */
@@ -58,6 +59,7 @@ enum {
SMC_GEN_LGR_SMCD, /* nest */
SMC_GEN_DEV_SMCD, /* nest */
SMC_GEN_DEV_SMCR, /* nest */
+ SMC_GEN_STATS, /* nest */
__SMC_GEN_MAX,
SMC_GEN_MAX = __SMC_GEN_MAX - 1
};
@@ -159,4 +161,71 @@ enum {
SMC_NLA_DEV_MAX = __SMC_NLA_DEV_MAX - 1
};
+/* SMC_NLA_STATS_T_TX(RX)_RMB_SIZE nested attributes */
+/* SMC_NLA_STATS_TX(RX)PLOAD_SIZE nested attributes */
+enum {
+ SMC_NLA_STATS_PLOAD_PAD,
+ SMC_NLA_STATS_PLOAD_8K, /* u64 */
+ SMC_NLA_STATS_PLOAD_16K, /* u64 */
+ SMC_NLA_STATS_PLOAD_32K, /* u64 */
+ SMC_NLA_STATS_PLOAD_64K, /* u64 */
+ SMC_NLA_STATS_PLOAD_128K, /* u64 */
+ SMC_NLA_STATS_PLOAD_256K, /* u64 */
+ SMC_NLA_STATS_PLOAD_512K, /* u64 */
+ SMC_NLA_STATS_PLOAD_1024K, /* u64 */
+ SMC_NLA_STATS_PLOAD_G_1024K, /* u64 */
+ __SMC_NLA_STATS_PLOAD_MAX,
+ SMC_NLA_STATS_PLOAD_MAX = __SMC_NLA_STATS_PLOAD_MAX - 1
+};
+
+/* SMC_NLA_STATS_T_TX(RX)_RMB_STATS nested attributes */
+enum {
+ SMC_NLA_STATS_RMB_PAD,
+ SMC_NLA_STATS_RMB_SIZE_SM_PEER_CNT, /* u64 */
+ SMC_NLA_STATS_RMB_SIZE_SM_CNT, /* u64 */
+ SMC_NLA_STATS_RMB_FULL_PEER_CNT, /* u64 */
+ SMC_NLA_STATS_RMB_FULL_CNT, /* u64 */
+ SMC_NLA_STATS_RMB_REUSE_CNT, /* u64 */
+ SMC_NLA_STATS_RMB_ALLOC_CNT, /* u64 */
+ SMC_NLA_STATS_RMB_DGRADE_CNT, /* u64 */
+ __SMC_NLA_STATS_RMB_MAX,
+ SMC_NLA_STATS_RMB_MAX = __SMC_NLA_STATS_RMB_MAX - 1
+};
+
+/* SMC_NLA_STATS_SMCD_TECH and _SMCR_TECH nested attributes */
+enum {
+ SMC_NLA_STATS_T_PAD,
+ SMC_NLA_STATS_T_TX_RMB_SIZE, /* nest */
+ SMC_NLA_STATS_T_RX_RMB_SIZE, /* nest */
+ SMC_NLA_STATS_T_TXPLOAD_SIZE, /* nest */
+ SMC_NLA_STATS_T_RXPLOAD_SIZE, /* nest */
+ SMC_NLA_STATS_T_TX_RMB_STATS, /* nest */
+ SMC_NLA_STATS_T_RX_RMB_STATS, /* nest */
+ SMC_NLA_STATS_T_CLNT_V1_SUCC, /* u64 */
+ SMC_NLA_STATS_T_CLNT_V2_SUCC, /* u64 */
+ SMC_NLA_STATS_T_SRV_V1_SUCC, /* u64 */
+ SMC_NLA_STATS_T_SRV_V2_SUCC, /* u64 */
+ SMC_NLA_STATS_T_SENDPAGE_CNT, /* u64 */
+ SMC_NLA_STATS_T_SPLICE_CNT, /* u64 */
+ SMC_NLA_STATS_T_CORK_CNT, /* u64 */
+ SMC_NLA_STATS_T_NDLY_CNT, /* u64 */
+ SMC_NLA_STATS_T_URG_DATA_CNT, /* u64 */
+ SMC_NLA_STATS_T_RX_BYTES, /* u64 */
+ SMC_NLA_STATS_T_TX_BYTES, /* u64 */
+ SMC_NLA_STATS_T_RX_CNT, /* u64 */
+ SMC_NLA_STATS_T_TX_CNT, /* u64 */
+ __SMC_NLA_STATS_T_MAX,
+ SMC_NLA_STATS_T_MAX = __SMC_NLA_STATS_T_MAX - 1
+};
+
+/* SMC_GEN_STATS attributes */
+enum {
+ SMC_NLA_STATS_PAD,
+ SMC_NLA_STATS_SMCD_TECH, /* nest */
+ SMC_NLA_STATS_SMCR_TECH, /* nest */
+ SMC_NLA_STATS_CLNT_HS_ERR_CNT, /* u64 */
+ SMC_NLA_STATS_SRV_HS_ERR_CNT, /* u64 */
+ __SMC_NLA_STATS_MAX,
+ SMC_NLA_STATS_MAX = __SMC_NLA_STATS_MAX - 1
+};
#endif /* _UAPI_LINUX_SMC_H */
diff --git a/net/smc/smc_netlink.c b/net/smc/smc_netlink.c
index 140419a19dbf..30e30b23370f 100644
--- a/net/smc/smc_netlink.c
+++ b/net/smc/smc_netlink.c
@@ -19,6 +19,7 @@
#include "smc_core.h"
#include "smc_ism.h"
#include "smc_ib.h"
+#include "smc_stats.h"
#include "smc_netlink.h"
#define SMC_CMD_MAX_ATTR 1
@@ -55,6 +56,11 @@ static const struct genl_ops smc_gen_nl_ops[] = {
/* can be retrieved by unprivileged users */
.dumpit = smcr_nl_get_device,
},
+ {
+ .cmd = SMC_NETLINK_GET_STATS,
+ /* can be retrieved by unprivileged users */
+ .dumpit = smc_nl_get_stats,
+ },
};
static const struct nla_policy smc_gen_nl_policy[2] = {
diff --git a/net/smc/smc_stats.c b/net/smc/smc_stats.c
index 76e938388520..72119d3d8558 100644
--- a/net/smc/smc_stats.c
+++ b/net/smc/smc_stats.c
@@ -12,6 +12,10 @@
#include <linux/mutex.h>
#include <linux/percpu.h>
#include <linux/ctype.h>
+#include <linux/smc.h>
+#include <net/genetlink.h>
+#include <net/sock.h>
+#include "smc_netlink.h"
#include "smc_stats.h"
/* serialize fallback reason statistic gathering */
@@ -33,3 +37,278 @@ void smc_stats_exit(void)
{
free_percpu(smc_stats);
}
+
+static int smc_nl_fill_stats_rmb_data(struct sk_buff *skb,
+ struct smc_stats *stats, int tech,
+ int type)
+{
+ struct smc_stats_rmbcnt *stats_rmb_cnt;
+ struct nlattr *attrs;
+
+ if (type == SMC_NLA_STATS_T_TX_RMB_STATS)
+ stats_rmb_cnt = &stats->smc[tech].rmb_tx;
+ else
+ stats_rmb_cnt = &stats->smc[tech].rmb_rx;
+
+ attrs = nla_nest_start(skb, type);
+ if (!attrs)
+ goto errout;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_REUSE_CNT,
+ stats_rmb_cnt->reuse_cnt,
+ SMC_NLA_STATS_RMB_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_SIZE_SM_PEER_CNT,
+ stats_rmb_cnt->buf_size_small_peer_cnt,
+ SMC_NLA_STATS_RMB_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_SIZE_SM_CNT,
+ stats_rmb_cnt->buf_size_small_cnt,
+ SMC_NLA_STATS_RMB_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_FULL_PEER_CNT,
+ stats_rmb_cnt->buf_full_peer_cnt,
+ SMC_NLA_STATS_RMB_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_FULL_CNT,
+ stats_rmb_cnt->buf_full_cnt,
+ SMC_NLA_STATS_RMB_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_ALLOC_CNT,
+ stats_rmb_cnt->alloc_cnt,
+ SMC_NLA_STATS_RMB_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_DGRADE_CNT,
+ stats_rmb_cnt->dgrade_cnt,
+ SMC_NLA_STATS_RMB_PAD))
+ goto errattr;
+
+ nla_nest_end(skb, attrs);
+ return 0;
+
+errattr:
+ nla_nest_cancel(skb, attrs);
+errout:
+ return -EMSGSIZE;
+}
+
+static int smc_nl_fill_stats_bufsize_data(struct sk_buff *skb,
+ struct smc_stats *stats, int tech,
+ int type)
+{
+ struct smc_stats_memsize *stats_pload;
+ struct nlattr *attrs;
+
+ if (type == SMC_NLA_STATS_T_TXPLOAD_SIZE)
+ stats_pload = &stats->smc[tech].tx_pd;
+ else if (type == SMC_NLA_STATS_T_RXPLOAD_SIZE)
+ stats_pload = &stats->smc[tech].rx_pd;
+ else if (type == SMC_NLA_STATS_T_TX_RMB_SIZE)
+ stats_pload = &stats->smc[tech].tx_rmbsize;
+ else if (type == SMC_NLA_STATS_T_RX_RMB_SIZE)
+ stats_pload = &stats->smc[tech].rx_rmbsize;
+ else
+ goto errout;
+
+ attrs = nla_nest_start(skb, type);
+ if (!attrs)
+ goto errout;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_8K,
+ stats_pload->buf[SMC_BUF_8K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_16K,
+ stats_pload->buf[SMC_BUF_16K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_32K,
+ stats_pload->buf[SMC_BUF_32K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_64K,
+ stats_pload->buf[SMC_BUF_64K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_128K,
+ stats_pload->buf[SMC_BUF_128K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_256K,
+ stats_pload->buf[SMC_BUF_256K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_512K,
+ stats_pload->buf[SMC_BUF_512K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_1024K,
+ stats_pload->buf[SMC_BUF_1024K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_G_1024K,
+ stats_pload->buf[SMC_BUF_G_1024K],
+ SMC_NLA_STATS_PLOAD_PAD))
+ goto errattr;
+
+ nla_nest_end(skb, attrs);
+ return 0;
+
+errattr:
+ nla_nest_cancel(skb, attrs);
+errout:
+ return -EMSGSIZE;
+}
+
+static int smc_nl_fill_stats_tech_data(struct sk_buff *skb,
+ struct smc_stats *stats, int tech)
+{
+ struct smc_stats_tech *smc_tech;
+ struct nlattr *attrs;
+
+ smc_tech = &stats->smc[tech];
+ if (tech == SMC_TYPE_D)
+ attrs = nla_nest_start(skb, SMC_NLA_STATS_SMCD_TECH);
+ else
+ attrs = nla_nest_start(skb, SMC_NLA_STATS_SMCR_TECH);
+
+ if (!attrs)
+ goto errout;
+ if (smc_nl_fill_stats_rmb_data(skb, stats, tech,
+ SMC_NLA_STATS_T_TX_RMB_STATS))
+ goto errattr;
+ if (smc_nl_fill_stats_rmb_data(skb, stats, tech,
+ SMC_NLA_STATS_T_RX_RMB_STATS))
+ goto errattr;
+ if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
+ SMC_NLA_STATS_T_TXPLOAD_SIZE))
+ goto errattr;
+ if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
+ SMC_NLA_STATS_T_RXPLOAD_SIZE))
+ goto errattr;
+ if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
+ SMC_NLA_STATS_T_TX_RMB_SIZE))
+ goto errattr;
+ if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
+ SMC_NLA_STATS_T_RX_RMB_SIZE))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_CLNT_V1_SUCC,
+ smc_tech->clnt_v1_succ_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_CLNT_V2_SUCC,
+ smc_tech->clnt_v2_succ_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SRV_V1_SUCC,
+ smc_tech->srv_v1_succ_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SRV_V2_SUCC,
+ smc_tech->srv_v2_succ_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_RX_BYTES,
+ smc_tech->rx_bytes,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_TX_BYTES,
+ smc_tech->tx_bytes,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_RX_CNT,
+ smc_tech->rx_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_TX_CNT,
+ smc_tech->tx_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SENDPAGE_CNT,
+ smc_tech->sendpage_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_CORK_CNT,
+ smc_tech->cork_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_NDLY_CNT,
+ smc_tech->ndly_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SPLICE_CNT,
+ smc_tech->splice_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_URG_DATA_CNT,
+ smc_tech->urg_data_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+
+ nla_nest_end(skb, attrs);
+ return 0;
+
+errattr:
+ nla_nest_cancel(skb, attrs);
+errout:
+ return -EMSGSIZE;
+}
+
+int smc_nl_get_stats(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
+ struct smc_stats *stats;
+ struct nlattr *attrs;
+ int cpu, i, size;
+ void *nlh;
+ u64 *src;
+ u64 *sum;
+
+ if (cb_ctx->pos[0])
+ goto errmsg;
+ nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ &smc_gen_nl_family, NLM_F_MULTI,
+ SMC_NETLINK_GET_STATS);
+ if (!nlh)
+ goto errmsg;
+
+ attrs = nla_nest_start(skb, SMC_GEN_STATS);
+ if (!attrs)
+ goto errnest;
+ stats = kzalloc(sizeof(*stats), GFP_KERNEL);
+ if (!stats)
+ goto erralloc;
+ size = sizeof(*stats) / sizeof(u64);
+ for_each_possible_cpu(cpu) {
+ src = (u64 *)per_cpu_ptr(smc_stats, cpu);
+ sum = (u64 *)stats;
+ for (i = 0; i < size; i++)
+ *(sum++) += *(src++);
+ }
+ if (smc_nl_fill_stats_tech_data(skb, stats, SMC_TYPE_D))
+ goto errattr;
+ if (smc_nl_fill_stats_tech_data(skb, stats, SMC_TYPE_R))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_CLNT_HS_ERR_CNT,
+ stats->clnt_hshake_err_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_STATS_SRV_HS_ERR_CNT,
+ stats->srv_hshake_err_cnt,
+ SMC_NLA_STATS_PAD))
+ goto errattr;
+
+ nla_nest_end(skb, attrs);
+ genlmsg_end(skb, nlh);
+ cb_ctx->pos[0] = 1;
+ kfree(stats);
+ return skb->len;
+
+errattr:
+ kfree(stats);
+erralloc:
+ nla_nest_cancel(skb, attrs);
+errnest:
+ genlmsg_cancel(skb, nlh);
+errmsg:
+ return skb->len;
+}
diff --git a/net/smc/smc_stats.h b/net/smc/smc_stats.h
index 928372114cf1..84baaca59eaf 100644
--- a/net/smc/smc_stats.h
+++ b/net/smc/smc_stats.h
@@ -247,6 +247,7 @@ do { \
} \
while (0)
+int smc_nl_get_stats(struct sk_buff *skb, struct netlink_callback *cb);
int smc_stats_init(void) __init;
void smc_stats_exit(void);
--
2.25.1
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