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| author | Ezequiel Lara Gomez <ezegomez@amazon.com> | 2017-03-11 20:06:54 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-21 14:40:01 -0700 |
| commit | 6df014cffbe335ea7f41ee5324d8ba2047d3f0d0 (patch) | |
| tree | 6848b5e2947b95b8100ea21a64542730a22340c5 /drivers/net/loopback.c | |
| parent | 406910a8ba0f0d4d36d1106f3106c47d6c86a33d (diff) | |
| download | linux-6df014cffbe335ea7f41ee5324d8ba2047d3f0d0.tar.bz2 | |
Enable tx timestamping on loopback and dummy
This enables developing code that uses SOF_TIMESTAMPING_TX_SOFTWARE
by using localhost addresses (without needing to send packets outside),
as well as enabling unit and functional testing of TX timestamping code
without needing hardware support or network access.
It also fulfills the expectation of software network devices supporting
software-based timestamping.
Tested on qemu using txtimestamping.c from the kernel selftests, and
ethtool -T.
Signed-off-by: Ezequiel Lara Gomez <ezegomez@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/loopback.c')
| -rw-r--r-- | drivers/net/loopback.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index b23b71981fd5..8d179d616993 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -55,6 +55,7 @@ #include <linux/ip.h> #include <linux/tcp.h> #include <linux/percpu.h> +#include <linux/net_tstamp.h> #include <net/net_namespace.h> #include <linux/u64_stats_sync.h> @@ -74,6 +75,7 @@ static netdev_tx_t loopback_xmit(struct sk_buff *skb, struct pcpu_lstats *lb_stats; int len; + skb_tx_timestamp(skb); skb_orphan(skb); /* Before queueing this packet to netif_rx(), @@ -129,8 +131,21 @@ static u32 always_on(struct net_device *dev) return 1; } +static int loopback_get_ts_info(struct net_device *netdev, + struct ethtool_ts_info *ts_info) +{ + ts_info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE; + + ts_info->phc_index = -1; + + return 0; +}; + static const struct ethtool_ops loopback_ethtool_ops = { .get_link = always_on, + .get_ts_info = loopback_get_ts_info, }; static int loopback_dev_init(struct net_device *dev) |