summaryrefslogtreecommitdiffstats
path: root/net/smc/smc_stats.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/smc/smc_stats.c')
-rw-r--r--net/smc/smc_stats.c413
1 files changed, 413 insertions, 0 deletions
diff --git a/net/smc/smc_stats.c b/net/smc/smc_stats.c
new file mode 100644
index 000000000..e80e34f7a
--- /dev/null
+++ b/net/smc/smc_stats.c
@@ -0,0 +1,413 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Shared Memory Communications over RDMA (SMC-R) and RoCE
+ *
+ * SMC statistics netlink routines
+ *
+ * Copyright IBM Corp. 2021
+ *
+ * Author(s): Guvenc Gulce
+ */
+#include <linux/init.h>
+#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"
+
+int smc_stats_init(struct net *net)
+{
+ net->smc.fback_rsn = kzalloc(sizeof(*net->smc.fback_rsn), GFP_KERNEL);
+ if (!net->smc.fback_rsn)
+ goto err_fback;
+ net->smc.smc_stats = alloc_percpu(struct smc_stats);
+ if (!net->smc.smc_stats)
+ goto err_stats;
+ mutex_init(&net->smc.mutex_fback_rsn);
+ return 0;
+
+err_stats:
+ kfree(net->smc.fback_rsn);
+err_fback:
+ return -ENOMEM;
+}
+
+void smc_stats_exit(struct net *net)
+{
+ kfree(net->smc.fback_rsn);
+ if (net->smc.smc_stats)
+ free_percpu(net->smc.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 net *net = sock_net(skb->sk);
+ 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(net->smc.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;
+}
+
+static int smc_nl_get_fback_details(struct sk_buff *skb,
+ struct netlink_callback *cb, int pos,
+ bool is_srv)
+{
+ struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
+ struct net *net = sock_net(skb->sk);
+ int cnt_reported = cb_ctx->pos[2];
+ struct smc_stats_fback *trgt_arr;
+ struct nlattr *attrs;
+ int rc = 0;
+ void *nlh;
+
+ if (is_srv)
+ trgt_arr = &net->smc.fback_rsn->srv[0];
+ else
+ trgt_arr = &net->smc.fback_rsn->clnt[0];
+ if (!trgt_arr[pos].fback_code)
+ return -ENODATA;
+ nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ &smc_gen_nl_family, NLM_F_MULTI,
+ SMC_NETLINK_GET_FBACK_STATS);
+ if (!nlh)
+ goto errmsg;
+ attrs = nla_nest_start(skb, SMC_GEN_FBACK_STATS);
+ if (!attrs)
+ goto errout;
+ if (nla_put_u8(skb, SMC_NLA_FBACK_STATS_TYPE, is_srv))
+ goto errattr;
+ if (!cnt_reported) {
+ if (nla_put_u64_64bit(skb, SMC_NLA_FBACK_STATS_SRV_CNT,
+ net->smc.fback_rsn->srv_fback_cnt,
+ SMC_NLA_FBACK_STATS_PAD))
+ goto errattr;
+ if (nla_put_u64_64bit(skb, SMC_NLA_FBACK_STATS_CLNT_CNT,
+ net->smc.fback_rsn->clnt_fback_cnt,
+ SMC_NLA_FBACK_STATS_PAD))
+ goto errattr;
+ cnt_reported = 1;
+ }
+
+ if (nla_put_u32(skb, SMC_NLA_FBACK_STATS_RSN_CODE,
+ trgt_arr[pos].fback_code))
+ goto errattr;
+ if (nla_put_u16(skb, SMC_NLA_FBACK_STATS_RSN_CNT,
+ trgt_arr[pos].count))
+ goto errattr;
+
+ cb_ctx->pos[2] = cnt_reported;
+ nla_nest_end(skb, attrs);
+ genlmsg_end(skb, nlh);
+ return rc;
+
+errattr:
+ nla_nest_cancel(skb, attrs);
+errout:
+ genlmsg_cancel(skb, nlh);
+errmsg:
+ return -EMSGSIZE;
+}
+
+int smc_nl_get_fback_stats(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
+ struct net *net = sock_net(skb->sk);
+ int rc_srv = 0, rc_clnt = 0, k;
+ int skip_serv = cb_ctx->pos[1];
+ int snum = cb_ctx->pos[0];
+ bool is_srv = true;
+
+ mutex_lock(&net->smc.mutex_fback_rsn);
+ for (k = 0; k < SMC_MAX_FBACK_RSN_CNT; k++) {
+ if (k < snum)
+ continue;
+ if (!skip_serv) {
+ rc_srv = smc_nl_get_fback_details(skb, cb, k, is_srv);
+ if (rc_srv && rc_srv != -ENODATA)
+ break;
+ } else {
+ skip_serv = 0;
+ }
+ rc_clnt = smc_nl_get_fback_details(skb, cb, k, !is_srv);
+ if (rc_clnt && rc_clnt != -ENODATA) {
+ skip_serv = 1;
+ break;
+ }
+ if (rc_clnt == -ENODATA && rc_srv == -ENODATA)
+ break;
+ }
+ mutex_unlock(&net->smc.mutex_fback_rsn);
+ cb_ctx->pos[1] = skip_serv;
+ cb_ctx->pos[0] = k;
+ return skb->len;
+}