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xdp: allow attaching programs loaded for specific device

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Pass the netdev pointer to bpf_prog_get_type().  This way
BPF code can decide whether the device matches what the
code was loaded/translated for.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2017-11-03 13:56:20 -07:00
committed by David S. Miller
parent 928631e054
commit 248f346ffe
3 changed files with 44 additions and 5 deletions
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6
net/core/dev.c
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@@ -7157,7 +7157,11 @@ int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
__dev_xdp_attached(dev, bpf_op, NULL))
return -EBUSY;
prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_XDP);
if (bpf_op == ops->ndo_bpf)
prog = bpf_prog_get_type_dev(fd, BPF_PROG_TYPE_XDP,
dev);
else
prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_XDP);
if (IS_ERR(prog))
return PTR_ERR(prog);
}