From cb5635a3677679666e4e81ecbb209d32f13dedcd Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp Date: Tue, 25 Apr 2017 08:19:41 +0200 Subject: [PATCH] can: complete initial namespace support The statistics and its proc output was not implemented as per-net in the initial network namespace support by Mario Kicherer (8e8cda6d737d). This patch adds the missing per-net statistics for the CAN subsystem. Signed-off-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde --- include/linux/can/core.h | 4 +- include/net/netns/can.h | 5 ++ net/can/af_can.c | 71 +++++++++++--------- net/can/af_can.h | 5 -- net/can/proc.c | 141 +++++++++++++++++++++------------------ 5 files changed, 121 insertions(+), 105 deletions(-) diff --git a/include/linux/can/core.h b/include/linux/can/core.h index 319a0da827b8..c9a17bb1221c 100644 --- a/include/linux/can/core.h +++ b/include/linux/can/core.h @@ -5,7 +5,7 @@ * * Authors: Oliver Hartkopp * Urs Thuermann - * Copyright (c) 2002-2007 Volkswagen Group Electronic Research + * Copyright (c) 2002-2017 Volkswagen Group Electronic Research * All rights reserved. * */ @@ -17,7 +17,7 @@ #include #include -#define CAN_VERSION "20120528" +#define CAN_VERSION "20170425" /* increment this number each time you change some user-space interface */ #define CAN_ABI_VERSION "9" diff --git a/include/net/netns/can.h b/include/net/netns/can.h index e8beba772f1a..574157dbc43a 100644 --- a/include/net/netns/can.h +++ b/include/net/netns/can.h @@ -8,6 +8,8 @@ #include struct dev_rcv_lists; +struct s_stats; +struct s_pstats; struct netns_can { #if IS_ENABLED(CONFIG_PROC_FS) @@ -26,6 +28,9 @@ struct netns_can { /* receive filters subscribed for 'all' CAN devices */ struct dev_rcv_lists *can_rx_alldev_list; spinlock_t can_rcvlists_lock; + struct timer_list can_stattimer;/* timer for statistics update */ + struct s_stats *can_stats; /* packet statistics */ + struct s_pstats *can_pstats; /* receive list statistics */ }; #endif /* __NETNS_CAN_H__ */ diff --git a/net/can/af_can.c b/net/can/af_can.c index 421b60fc42c3..b6406fe33c76 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -2,7 +2,7 @@ * af_can.c - Protocol family CAN core module * (used by different CAN protocol modules) * - * Copyright (c) 2002-2007 Volkswagen Group Electronic Research + * Copyright (c) 2002-2017 Volkswagen Group Electronic Research * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -81,10 +81,6 @@ static struct kmem_cache *rcv_cache __read_mostly; static const struct can_proto *proto_tab[CAN_NPROTO] __read_mostly; static DEFINE_MUTEX(proto_tab_lock); -struct timer_list can_stattimer; /* timer for statistics update */ -struct s_stats can_stats; /* packet statistics */ -struct s_pstats can_pstats; /* receive list statistics */ - static atomic_t skbcounter = ATOMIC_INIT(0); /* @@ -221,6 +217,7 @@ int can_send(struct sk_buff *skb, int loop) { struct sk_buff *newskb = NULL; struct canfd_frame *cfd = (struct canfd_frame *)skb->data; + struct s_stats *can_stats = dev_net(skb->dev)->can.can_stats; int err = -EINVAL; if (skb->len == CAN_MTU) { @@ -309,8 +306,8 @@ int can_send(struct sk_buff *skb, int loop) netif_rx_ni(newskb); /* update statistics */ - can_stats.tx_frames++; - can_stats.tx_frames_delta++; + can_stats->tx_frames++; + can_stats->tx_frames_delta++; return 0; @@ -468,6 +465,7 @@ int can_rx_register(struct net *net, struct net_device *dev, canid_t can_id, struct receiver *r; struct hlist_head *rl; struct dev_rcv_lists *d; + struct s_pstats *can_pstats = net->can.can_pstats; int err = 0; /* insert new receiver (dev,canid,mask) -> (func,data) */ @@ -499,9 +497,9 @@ int can_rx_register(struct net *net, struct net_device *dev, canid_t can_id, hlist_add_head_rcu(&r->list, rl); d->entries++; - can_pstats.rcv_entries++; - if (can_pstats.rcv_entries_max < can_pstats.rcv_entries) - can_pstats.rcv_entries_max = can_pstats.rcv_entries; + can_pstats->rcv_entries++; + if (can_pstats->rcv_entries_max < can_pstats->rcv_entries) + can_pstats->rcv_entries_max = can_pstats->rcv_entries; } else { kmem_cache_free(rcv_cache, r); err = -ENODEV; @@ -543,6 +541,7 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id, { struct receiver *r = NULL; struct hlist_head *rl; + struct s_pstats *can_pstats = net->can.can_pstats; struct dev_rcv_lists *d; if (dev && dev->type != ARPHRD_CAN) @@ -589,8 +588,8 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id, hlist_del_rcu(&r->list); d->entries--; - if (can_pstats.rcv_entries > 0) - can_pstats.rcv_entries--; + if (can_pstats->rcv_entries > 0) + can_pstats->rcv_entries--; /* remove device structure requested by NETDEV_UNREGISTER */ if (d->remove_on_zero_entries && !d->entries) { @@ -684,11 +683,13 @@ static int can_rcv_filter(struct dev_rcv_lists *d, struct sk_buff *skb) static void can_receive(struct sk_buff *skb, struct net_device *dev) { struct dev_rcv_lists *d; + struct net *net = dev_net(dev); + struct s_stats *can_stats = net->can.can_stats; int matches; /* update statistics */ - can_stats.rx_frames++; - can_stats.rx_frames_delta++; + can_stats->rx_frames++; + can_stats->rx_frames_delta++; /* create non-zero unique skb identifier together with *skb */ while (!(can_skb_prv(skb)->skbcnt)) @@ -697,10 +698,10 @@ static void can_receive(struct sk_buff *skb, struct net_device *dev) rcu_read_lock(); /* deliver the packet to sockets listening on all devices */ - matches = can_rcv_filter(dev_net(dev)->can.can_rx_alldev_list, skb); + matches = can_rcv_filter(net->can.can_rx_alldev_list, skb); /* find receive list for this device */ - d = find_dev_rcv_lists(dev_net(dev), dev); + d = find_dev_rcv_lists(net, dev); if (d) matches += can_rcv_filter(d, skb); @@ -710,8 +711,8 @@ static void can_receive(struct sk_buff *skb, struct net_device *dev) consume_skb(skb); if (matches > 0) { - can_stats.matches++; - can_stats.matches_delta++; + can_stats->matches++; + can_stats->matches_delta++; } } @@ -876,8 +877,20 @@ static int can_pernet_init(struct net *net) net->can.can_rx_alldev_list = kzalloc(sizeof(struct dev_rcv_lists), GFP_KERNEL); - if (IS_ENABLED(CONFIG_PROC_FS)) + net->can.can_stats = kzalloc(sizeof(struct s_stats), GFP_KERNEL); + net->can.can_pstats = kzalloc(sizeof(struct s_pstats), GFP_KERNEL); + + if (IS_ENABLED(CONFIG_PROC_FS)) { + /* the statistics are updated every second (timer triggered) */ + if (stats_timer) { + setup_timer(&net->can.can_stattimer, can_stat_update, + (unsigned long)net); + mod_timer(&net->can.can_stattimer, + round_jiffies(jiffies + HZ)); + } + net->can.can_stats->jiffies_init = jiffies; can_init_proc(net); + } return 0; } @@ -886,8 +899,11 @@ static void can_pernet_exit(struct net *net) { struct net_device *dev; - if (IS_ENABLED(CONFIG_PROC_FS)) + if (IS_ENABLED(CONFIG_PROC_FS)) { can_remove_proc(net); + if (stats_timer) + del_timer_sync(&net->can.can_stattimer); + } /* remove created dev_rcv_lists from still registered CAN devices */ rcu_read_lock(); @@ -903,6 +919,8 @@ static void can_pernet_exit(struct net *net) rcu_read_unlock(); kfree(net->can.can_rx_alldev_list); + kfree(net->can.can_stats); + kfree(net->can.can_pstats); } /* @@ -950,14 +968,6 @@ static __init int can_init(void) if (!rcv_cache) return -ENOMEM; - if (IS_ENABLED(CONFIG_PROC_FS)) { - if (stats_timer) { - /* the statistics are updated every second (timer triggered) */ - setup_timer(&can_stattimer, can_stat_update, 0); - mod_timer(&can_stattimer, round_jiffies(jiffies + HZ)); - } - } - register_pernet_subsys(&can_pernet_ops); /* protocol register */ @@ -971,11 +981,6 @@ static __init int can_init(void) static __exit void can_exit(void) { - if (IS_ENABLED(CONFIG_PROC_FS)) { - if (stats_timer) - del_timer_sync(&can_stattimer); - } - /* protocol unregister */ dev_remove_pack(&canfd_packet); dev_remove_pack(&can_packet); diff --git a/net/can/af_can.h b/net/can/af_can.h index 84a35e97c5e0..d0ef45bb2a72 100644 --- a/net/can/af_can.h +++ b/net/can/af_can.h @@ -115,9 +115,4 @@ void can_init_proc(struct net *net); void can_remove_proc(struct net *net); void can_stat_update(unsigned long data); -/* structures and variables from af_can.c needed in proc.c for reading */ -extern struct timer_list can_stattimer; /* timer for statistics update */ -extern struct s_stats can_stats; /* packet statistics */ -extern struct s_pstats can_pstats; /* receive list statistics */ - #endif /* AF_CAN_H */ diff --git a/net/can/proc.c b/net/can/proc.c index 9a8d54d57b22..83045f00c63c 100644 --- a/net/can/proc.c +++ b/net/can/proc.c @@ -75,21 +75,23 @@ static const char rx_list_name[][8] = { * af_can statistics stuff */ -static void can_init_stats(void) +static void can_init_stats(struct net *net) { + struct s_stats *can_stats = net->can.can_stats; + struct s_pstats *can_pstats = net->can.can_pstats; /* * This memset function is called from a timer context (when * can_stattimer is active which is the default) OR in a process * context (reading the proc_fs when can_stattimer is disabled). */ - memset(&can_stats, 0, sizeof(can_stats)); - can_stats.jiffies_init = jiffies; + memset(can_stats, 0, sizeof(struct s_stats)); + can_stats->jiffies_init = jiffies; - can_pstats.stats_reset++; + can_pstats->stats_reset++; if (user_reset) { user_reset = 0; - can_pstats.user_reset++; + can_pstats->user_reset++; } } @@ -115,64 +117,66 @@ static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif, void can_stat_update(unsigned long data) { + struct net *net = (struct net *)data; + struct s_stats *can_stats = net->can.can_stats; unsigned long j = jiffies; /* snapshot */ /* restart counting in timer context on user request */ if (user_reset) - can_init_stats(); + can_init_stats(net); /* restart counting on jiffies overflow */ - if (j < can_stats.jiffies_init) - can_init_stats(); + if (j < can_stats->jiffies_init) + can_init_stats(net); /* prevent overflow in calc_rate() */ - if (can_stats.rx_frames > (ULONG_MAX / HZ)) - can_init_stats(); + if (can_stats->rx_frames > (ULONG_MAX / HZ)) + can_init_stats(net); /* prevent overflow in calc_rate() */ - if (can_stats.tx_frames > (ULONG_MAX / HZ)) - can_init_stats(); + if (can_stats->tx_frames > (ULONG_MAX / HZ)) + can_init_stats(net); /* matches overflow - very improbable */ - if (can_stats.matches > (ULONG_MAX / 100)) - can_init_stats(); + if (can_stats->matches > (ULONG_MAX / 100)) + can_init_stats(net); /* calc total values */ - if (can_stats.rx_frames) - can_stats.total_rx_match_ratio = (can_stats.matches * 100) / - can_stats.rx_frames; + if (can_stats->rx_frames) + can_stats->total_rx_match_ratio = (can_stats->matches * 100) / + can_stats->rx_frames; - can_stats.total_tx_rate = calc_rate(can_stats.jiffies_init, j, - can_stats.tx_frames); - can_stats.total_rx_rate = calc_rate(can_stats.jiffies_init, j, - can_stats.rx_frames); + can_stats->total_tx_rate = calc_rate(can_stats->jiffies_init, j, + can_stats->tx_frames); + can_stats->total_rx_rate = calc_rate(can_stats->jiffies_init, j, + can_stats->rx_frames); /* calc current values */ - if (can_stats.rx_frames_delta) - can_stats.current_rx_match_ratio = - (can_stats.matches_delta * 100) / - can_stats.rx_frames_delta; + if (can_stats->rx_frames_delta) + can_stats->current_rx_match_ratio = + (can_stats->matches_delta * 100) / + can_stats->rx_frames_delta; - can_stats.current_tx_rate = calc_rate(0, HZ, can_stats.tx_frames_delta); - can_stats.current_rx_rate = calc_rate(0, HZ, can_stats.rx_frames_delta); + can_stats->current_tx_rate = calc_rate(0, HZ, can_stats->tx_frames_delta); + can_stats->current_rx_rate = calc_rate(0, HZ, can_stats->rx_frames_delta); /* check / update maximum values */ - if (can_stats.max_tx_rate < can_stats.current_tx_rate) - can_stats.max_tx_rate = can_stats.current_tx_rate; + if (can_stats->max_tx_rate < can_stats->current_tx_rate) + can_stats->max_tx_rate = can_stats->current_tx_rate; - if (can_stats.max_rx_rate < can_stats.current_rx_rate) - can_stats.max_rx_rate = can_stats.current_rx_rate; + if (can_stats->max_rx_rate < can_stats->current_rx_rate) + can_stats->max_rx_rate = can_stats->current_rx_rate; - if (can_stats.max_rx_match_ratio < can_stats.current_rx_match_ratio) - can_stats.max_rx_match_ratio = can_stats.current_rx_match_ratio; + if (can_stats->max_rx_match_ratio < can_stats->current_rx_match_ratio) + can_stats->max_rx_match_ratio = can_stats->current_rx_match_ratio; /* clear values for 'current rate' calculation */ - can_stats.tx_frames_delta = 0; - can_stats.rx_frames_delta = 0; - can_stats.matches_delta = 0; + can_stats->tx_frames_delta = 0; + can_stats->rx_frames_delta = 0; + can_stats->matches_delta = 0; /* restart timer (one second) */ - mod_timer(&can_stattimer, round_jiffies(jiffies + HZ)); + mod_timer(&net->can.can_stattimer, round_jiffies(jiffies + HZ)); } /* @@ -206,57 +210,61 @@ static void can_print_recv_banner(struct seq_file *m) static int can_stats_proc_show(struct seq_file *m, void *v) { + struct net *net = m->private; + struct s_stats *can_stats = net->can.can_stats; + struct s_pstats *can_pstats = net->can.can_pstats; + seq_putc(m, '\n'); - seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats.tx_frames); - seq_printf(m, " %8ld received frames (RXF)\n", can_stats.rx_frames); - seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats.matches); + seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats->tx_frames); + seq_printf(m, " %8ld received frames (RXF)\n", can_stats->rx_frames); + seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats->matches); seq_putc(m, '\n'); - if (can_stattimer.function == can_stat_update) { + if (net->can.can_stattimer.function == can_stat_update) { seq_printf(m, " %8ld %% total match ratio (RXMR)\n", - can_stats.total_rx_match_ratio); + can_stats->total_rx_match_ratio); seq_printf(m, " %8ld frames/s total tx rate (TXR)\n", - can_stats.total_tx_rate); + can_stats->total_tx_rate); seq_printf(m, " %8ld frames/s total rx rate (RXR)\n", - can_stats.total_rx_rate); + can_stats->total_rx_rate); seq_putc(m, '\n'); seq_printf(m, " %8ld %% current match ratio (CRXMR)\n", - can_stats.current_rx_match_ratio); + can_stats->current_rx_match_ratio); seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n", - can_stats.current_tx_rate); + can_stats->current_tx_rate); seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n", - can_stats.current_rx_rate); + can_stats->current_rx_rate); seq_putc(m, '\n'); seq_printf(m, " %8ld %% max match ratio (MRXMR)\n", - can_stats.max_rx_match_ratio); + can_stats->max_rx_match_ratio); seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n", - can_stats.max_tx_rate); + can_stats->max_tx_rate); seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n", - can_stats.max_rx_rate); + can_stats->max_rx_rate); seq_putc(m, '\n'); } seq_printf(m, " %8ld current receive list entries (CRCV)\n", - can_pstats.rcv_entries); + can_pstats->rcv_entries); seq_printf(m, " %8ld maximum receive list entries (MRCV)\n", - can_pstats.rcv_entries_max); + can_pstats->rcv_entries_max); - if (can_pstats.stats_reset) + if (can_pstats->stats_reset) seq_printf(m, "\n %8ld statistic resets (STR)\n", - can_pstats.stats_reset); + can_pstats->stats_reset); - if (can_pstats.user_reset) + if (can_pstats->user_reset) seq_printf(m, " %8ld user statistic resets (USTR)\n", - can_pstats.user_reset); + can_pstats->user_reset); seq_putc(m, '\n'); return 0; @@ -264,7 +272,7 @@ static int can_stats_proc_show(struct seq_file *m, void *v) static int can_stats_proc_open(struct inode *inode, struct file *file) { - return single_open(file, can_stats_proc_show, NULL); + return single_open_net(inode, file, can_stats_proc_show); } static const struct file_operations can_stats_proc_fops = { @@ -277,25 +285,28 @@ static const struct file_operations can_stats_proc_fops = { static int can_reset_stats_proc_show(struct seq_file *m, void *v) { + struct net *net = m->private; + struct s_pstats *can_pstats = net->can.can_pstats; + struct s_stats *can_stats = net->can.can_stats; + user_reset = 1; - if (can_stattimer.function == can_stat_update) { + if (net->can.can_stattimer.function == can_stat_update) { seq_printf(m, "Scheduled statistic reset #%ld.\n", - can_pstats.stats_reset + 1); - + can_pstats->stats_reset + 1); } else { - if (can_stats.jiffies_init != jiffies) - can_init_stats(); + if (can_stats->jiffies_init != jiffies) + can_init_stats(net); seq_printf(m, "Performed statistic reset #%ld.\n", - can_pstats.stats_reset); + can_pstats->stats_reset); } return 0; } static int can_reset_stats_proc_open(struct inode *inode, struct file *file) { - return single_open(file, can_reset_stats_proc_show, NULL); + return single_open_net(inode, file, can_reset_stats_proc_show); } static const struct file_operations can_reset_stats_proc_fops = { @@ -314,7 +325,7 @@ static int can_version_proc_show(struct seq_file *m, void *v) static int can_version_proc_open(struct inode *inode, struct file *file) { - return single_open(file, can_version_proc_show, NULL); + return single_open_net(inode, file, can_version_proc_show); } static const struct file_operations can_version_proc_fops = { -- 2.20.1