414 строки
11 KiB
C
414 строки
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* SMC statistics netlink routines
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*
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* Copyright IBM Corp. 2021
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*
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* Author(s): Guvenc Gulce
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*/
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/percpu.h>
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#include <linux/ctype.h>
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#include <linux/smc.h>
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#include <net/genetlink.h>
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#include <net/sock.h>
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#include "smc_netlink.h"
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#include "smc_stats.h"
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int smc_stats_init(struct net *net)
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{
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net->smc.fback_rsn = kzalloc(sizeof(*net->smc.fback_rsn), GFP_KERNEL);
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if (!net->smc.fback_rsn)
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goto err_fback;
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net->smc.smc_stats = alloc_percpu(struct smc_stats);
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if (!net->smc.smc_stats)
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goto err_stats;
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mutex_init(&net->smc.mutex_fback_rsn);
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return 0;
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err_stats:
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kfree(net->smc.fback_rsn);
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err_fback:
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return -ENOMEM;
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}
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void smc_stats_exit(struct net *net)
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{
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kfree(net->smc.fback_rsn);
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if (net->smc.smc_stats)
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free_percpu(net->smc.smc_stats);
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}
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static int smc_nl_fill_stats_rmb_data(struct sk_buff *skb,
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struct smc_stats *stats, int tech,
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int type)
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{
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struct smc_stats_rmbcnt *stats_rmb_cnt;
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struct nlattr *attrs;
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if (type == SMC_NLA_STATS_T_TX_RMB_STATS)
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stats_rmb_cnt = &stats->smc[tech].rmb_tx;
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else
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stats_rmb_cnt = &stats->smc[tech].rmb_rx;
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attrs = nla_nest_start(skb, type);
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if (!attrs)
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goto errout;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_REUSE_CNT,
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stats_rmb_cnt->reuse_cnt,
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SMC_NLA_STATS_RMB_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_SIZE_SM_PEER_CNT,
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stats_rmb_cnt->buf_size_small_peer_cnt,
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SMC_NLA_STATS_RMB_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_SIZE_SM_CNT,
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stats_rmb_cnt->buf_size_small_cnt,
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SMC_NLA_STATS_RMB_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_FULL_PEER_CNT,
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stats_rmb_cnt->buf_full_peer_cnt,
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SMC_NLA_STATS_RMB_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_FULL_CNT,
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stats_rmb_cnt->buf_full_cnt,
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SMC_NLA_STATS_RMB_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_ALLOC_CNT,
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stats_rmb_cnt->alloc_cnt,
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SMC_NLA_STATS_RMB_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_RMB_DGRADE_CNT,
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stats_rmb_cnt->dgrade_cnt,
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SMC_NLA_STATS_RMB_PAD))
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goto errattr;
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nla_nest_end(skb, attrs);
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return 0;
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errattr:
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nla_nest_cancel(skb, attrs);
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errout:
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return -EMSGSIZE;
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}
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static int smc_nl_fill_stats_bufsize_data(struct sk_buff *skb,
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struct smc_stats *stats, int tech,
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int type)
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{
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struct smc_stats_memsize *stats_pload;
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struct nlattr *attrs;
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if (type == SMC_NLA_STATS_T_TXPLOAD_SIZE)
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stats_pload = &stats->smc[tech].tx_pd;
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else if (type == SMC_NLA_STATS_T_RXPLOAD_SIZE)
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stats_pload = &stats->smc[tech].rx_pd;
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else if (type == SMC_NLA_STATS_T_TX_RMB_SIZE)
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stats_pload = &stats->smc[tech].tx_rmbsize;
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else if (type == SMC_NLA_STATS_T_RX_RMB_SIZE)
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stats_pload = &stats->smc[tech].rx_rmbsize;
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else
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goto errout;
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attrs = nla_nest_start(skb, type);
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if (!attrs)
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goto errout;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_8K,
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stats_pload->buf[SMC_BUF_8K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_16K,
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stats_pload->buf[SMC_BUF_16K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_32K,
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stats_pload->buf[SMC_BUF_32K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_64K,
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stats_pload->buf[SMC_BUF_64K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_128K,
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stats_pload->buf[SMC_BUF_128K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_256K,
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stats_pload->buf[SMC_BUF_256K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_512K,
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stats_pload->buf[SMC_BUF_512K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_1024K,
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stats_pload->buf[SMC_BUF_1024K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_PLOAD_G_1024K,
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stats_pload->buf[SMC_BUF_G_1024K],
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SMC_NLA_STATS_PLOAD_PAD))
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goto errattr;
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nla_nest_end(skb, attrs);
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return 0;
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errattr:
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nla_nest_cancel(skb, attrs);
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errout:
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return -EMSGSIZE;
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}
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static int smc_nl_fill_stats_tech_data(struct sk_buff *skb,
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struct smc_stats *stats, int tech)
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{
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struct smc_stats_tech *smc_tech;
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struct nlattr *attrs;
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smc_tech = &stats->smc[tech];
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if (tech == SMC_TYPE_D)
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attrs = nla_nest_start(skb, SMC_NLA_STATS_SMCD_TECH);
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else
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attrs = nla_nest_start(skb, SMC_NLA_STATS_SMCR_TECH);
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if (!attrs)
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goto errout;
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if (smc_nl_fill_stats_rmb_data(skb, stats, tech,
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SMC_NLA_STATS_T_TX_RMB_STATS))
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goto errattr;
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if (smc_nl_fill_stats_rmb_data(skb, stats, tech,
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SMC_NLA_STATS_T_RX_RMB_STATS))
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goto errattr;
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if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
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SMC_NLA_STATS_T_TXPLOAD_SIZE))
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goto errattr;
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if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
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SMC_NLA_STATS_T_RXPLOAD_SIZE))
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goto errattr;
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if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
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SMC_NLA_STATS_T_TX_RMB_SIZE))
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goto errattr;
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if (smc_nl_fill_stats_bufsize_data(skb, stats, tech,
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SMC_NLA_STATS_T_RX_RMB_SIZE))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_CLNT_V1_SUCC,
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smc_tech->clnt_v1_succ_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_CLNT_V2_SUCC,
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smc_tech->clnt_v2_succ_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SRV_V1_SUCC,
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smc_tech->srv_v1_succ_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SRV_V2_SUCC,
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smc_tech->srv_v2_succ_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_RX_BYTES,
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smc_tech->rx_bytes,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_TX_BYTES,
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smc_tech->tx_bytes,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_RX_CNT,
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smc_tech->rx_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_TX_CNT,
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smc_tech->tx_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SENDPAGE_CNT,
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smc_tech->sendpage_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_CORK_CNT,
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smc_tech->cork_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_NDLY_CNT,
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smc_tech->ndly_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_SPLICE_CNT,
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smc_tech->splice_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_T_URG_DATA_CNT,
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smc_tech->urg_data_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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nla_nest_end(skb, attrs);
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return 0;
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errattr:
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nla_nest_cancel(skb, attrs);
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errout:
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return -EMSGSIZE;
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}
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int smc_nl_get_stats(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 net *net = sock_net(skb->sk);
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struct smc_stats *stats;
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struct nlattr *attrs;
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int cpu, i, size;
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void *nlh;
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u64 *src;
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u64 *sum;
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if (cb_ctx->pos[0])
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goto errmsg;
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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_STATS);
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if (!nlh)
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goto errmsg;
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attrs = nla_nest_start(skb, SMC_GEN_STATS);
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if (!attrs)
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goto errnest;
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stats = kzalloc(sizeof(*stats), GFP_KERNEL);
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if (!stats)
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goto erralloc;
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size = sizeof(*stats) / sizeof(u64);
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for_each_possible_cpu(cpu) {
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src = (u64 *)per_cpu_ptr(net->smc.smc_stats, cpu);
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sum = (u64 *)stats;
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for (i = 0; i < size; i++)
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*(sum++) += *(src++);
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}
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if (smc_nl_fill_stats_tech_data(skb, stats, SMC_TYPE_D))
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goto errattr;
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if (smc_nl_fill_stats_tech_data(skb, stats, SMC_TYPE_R))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_CLNT_HS_ERR_CNT,
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stats->clnt_hshake_err_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_STATS_SRV_HS_ERR_CNT,
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stats->srv_hshake_err_cnt,
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SMC_NLA_STATS_PAD))
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goto errattr;
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nla_nest_end(skb, attrs);
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genlmsg_end(skb, nlh);
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cb_ctx->pos[0] = 1;
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kfree(stats);
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return skb->len;
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errattr:
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kfree(stats);
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erralloc:
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nla_nest_cancel(skb, attrs);
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errnest:
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genlmsg_cancel(skb, nlh);
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errmsg:
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return skb->len;
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}
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static int smc_nl_get_fback_details(struct sk_buff *skb,
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struct netlink_callback *cb, int pos,
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bool is_srv)
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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 net *net = sock_net(skb->sk);
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int cnt_reported = cb_ctx->pos[2];
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struct smc_stats_fback *trgt_arr;
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struct nlattr *attrs;
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int rc = 0;
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void *nlh;
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if (is_srv)
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trgt_arr = &net->smc.fback_rsn->srv[0];
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else
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trgt_arr = &net->smc.fback_rsn->clnt[0];
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if (!trgt_arr[pos].fback_code)
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return -ENODATA;
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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_FBACK_STATS);
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if (!nlh)
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goto errmsg;
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attrs = nla_nest_start(skb, SMC_GEN_FBACK_STATS);
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if (!attrs)
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goto errout;
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if (nla_put_u8(skb, SMC_NLA_FBACK_STATS_TYPE, is_srv))
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goto errattr;
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if (!cnt_reported) {
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if (nla_put_u64_64bit(skb, SMC_NLA_FBACK_STATS_SRV_CNT,
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net->smc.fback_rsn->srv_fback_cnt,
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SMC_NLA_FBACK_STATS_PAD))
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goto errattr;
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if (nla_put_u64_64bit(skb, SMC_NLA_FBACK_STATS_CLNT_CNT,
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net->smc.fback_rsn->clnt_fback_cnt,
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SMC_NLA_FBACK_STATS_PAD))
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goto errattr;
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cnt_reported = 1;
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}
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if (nla_put_u32(skb, SMC_NLA_FBACK_STATS_RSN_CODE,
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trgt_arr[pos].fback_code))
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goto errattr;
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if (nla_put_u16(skb, SMC_NLA_FBACK_STATS_RSN_CNT,
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trgt_arr[pos].count))
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goto errattr;
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cb_ctx->pos[2] = cnt_reported;
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nla_nest_end(skb, attrs);
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genlmsg_end(skb, nlh);
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return rc;
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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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int smc_nl_get_fback_stats(struct sk_buff *skb, 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 net *net = sock_net(skb->sk);
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int rc_srv = 0, rc_clnt = 0, k;
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int skip_serv = cb_ctx->pos[1];
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int snum = cb_ctx->pos[0];
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bool is_srv = true;
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mutex_lock(&net->smc.mutex_fback_rsn);
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for (k = 0; k < SMC_MAX_FBACK_RSN_CNT; k++) {
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if (k < snum)
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continue;
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if (!skip_serv) {
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rc_srv = smc_nl_get_fback_details(skb, cb, k, is_srv);
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if (rc_srv && rc_srv != -ENODATA)
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break;
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} else {
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skip_serv = 0;
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}
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rc_clnt = smc_nl_get_fback_details(skb, cb, k, !is_srv);
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if (rc_clnt && rc_clnt != -ENODATA) {
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skip_serv = 1;
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break;
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}
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if (rc_clnt == -ENODATA && rc_srv == -ENODATA)
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break;
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}
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mutex_unlock(&net->smc.mutex_fback_rsn);
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cb_ctx->pos[1] = skip_serv;
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cb_ctx->pos[0] = k;
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return skb->len;
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}
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