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can: complete initial namespace support

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The statistics and its proc output was not implemented as per-net in the
initial network namespace support by Mario Kicherer (8e8cda6d73).
This patch adds the missing per-net statistics for the CAN subsystem.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Oliver Hartkopp
2017-04-25 08:19:41 +02:00
committed by Marc Kleine-Budde
parent f2e72f43e7
commit cb5635a367
5 changed files with 121 additions and 105 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
net/can/af_can.c
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@@ -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);