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| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2018-05-31 11:00:03 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-06-03 08:11:34 -0700 |
| commit | 0c9d917b7d74b758af1b4e37996af48d95b2ef33 (patch) | |
| tree | 379c0c7124939d33393c5c73ce1c86be6df17e51 /drivers/net/tun.c | |
| parent | 5e2e609522d67750d4b3c0321d1917bb109ac41b (diff) | |
| download | linux-stable-0c9d917b7d74b758af1b4e37996af48d95b2ef33.tar.gz linux-stable-0c9d917b7d74b758af1b4e37996af48d95b2ef33.tar.bz2 linux-stable-0c9d917b7d74b758af1b4e37996af48d95b2ef33.zip | |
tun: implement flush flag for ndo_xdp_xmit
When passed the XDP_XMIT_FLUSH flag tun_xdp_xmit now performs the same
kind of socket wake up as in tun_xdp_flush(). The wake up code from
tun_xdp_flush is generalized and shared with tun_xdp_xmit.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index b182b8cdd219..d82a05fb0594 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1285,6 +1285,14 @@ static const struct net_device_ops tun_netdev_ops = { .ndo_get_stats64 = tun_net_get_stats64, }; +static void __tun_xdp_flush_tfile(struct tun_file *tfile) +{ + /* Notify and wake up reader process */ + if (tfile->flags & TUN_FASYNC) + kill_fasync(&tfile->fasync, SIGIO, POLL_IN); + tfile->socket.sk->sk_data_ready(tfile->socket.sk); +} + static int tun_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, u32 flags) { @@ -1295,7 +1303,7 @@ static int tun_xdp_xmit(struct net_device *dev, int n, int cnt = n; int i; - if (unlikely(flags & ~XDP_XMIT_FLAGS_NONE)) + if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) return -EINVAL; rcu_read_lock(); @@ -1325,6 +1333,9 @@ static int tun_xdp_xmit(struct net_device *dev, int n, } spin_unlock(&tfile->tx_ring.producer_lock); + if (flags & XDP_XMIT_FLUSH) + __tun_xdp_flush_tfile(tfile); + rcu_read_unlock(); return cnt - drops; } @@ -1353,11 +1364,7 @@ static void tun_xdp_flush(struct net_device *dev) tfile = rcu_dereference(tun->tfiles[smp_processor_id() % numqueues]); - /* Notify and wake up reader process */ - if (tfile->flags & TUN_FASYNC) - kill_fasync(&tfile->fasync, SIGIO, POLL_IN); - tfile->socket.sk->sk_data_ready(tfile->socket.sk); - + __tun_xdp_flush_tfile(tfile); out: rcu_read_unlock(); } |