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| author |   John Fastabend <john.fastabend@gmail.com> | 2017-07-17 09:28:35 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-07-17 09:48:06 -0700 |
| commit | 5acaee0a8964c9bab7775ab8bedcd1f66a2a1011 (patch) | |
| tree | 1e1d190f59d1d5f0e1975e04e32feb500da9c5b8 /net/core/filter.c | |
| parent | ixgbe: add initial support for xdp redirect (diff) | |
| download | linux-dev-5acaee0a8964c9bab7775ab8bedcd1f66a2a1011.tar.xz linux-dev-5acaee0a8964c9bab7775ab8bedcd1f66a2a1011.zip | |
xdp: add trace event for xdp redirect
This adds a trace event for xdp redirect which may help when debugging
XDP programs that use redirect bpf commands.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/filter.c')
| -rw-r--r-- | net/core/filter.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index eeb713461c25..e30d38b27f21 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -55,6 +55,7 @@ #include <net/sock_reuseport.h> #include <net/busy_poll.h> #include <net/tcp.h> +#include <linux/bpf_trace.h> /** * sk_filter_trim_cap - run a packet through a socket filter @@ -2422,18 +2423,22 @@ static int __bpf_tx_xdp(struct net_device *dev, struct xdp_buff *xdp) return -EOPNOTSUPP; } -int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp) +int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp, + struct bpf_prog *xdp_prog) { struct redirect_info *ri = this_cpu_ptr(&redirect_info); + struct net_device *fwd; - dev = dev_get_by_index_rcu(dev_net(dev), ri->ifindex); + fwd = dev_get_by_index_rcu(dev_net(dev), ri->ifindex); ri->ifindex = 0; - if (unlikely(!dev)) { + if (unlikely(!fwd)) { bpf_warn_invalid_xdp_redirect(ri->ifindex); return -EINVAL; } - return __bpf_tx_xdp(dev, xdp); + trace_xdp_redirect(dev, fwd, xdp_prog, XDP_REDIRECT); + + return __bpf_tx_xdp(fwd, xdp); } EXPORT_SYMBOL_GPL(xdp_do_redirect); |