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bpf: offload: move offload device validation out to the drivers

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With TC shared block changes we can't depend on correct netdev
pointer being available in cls_bpf.  Move the device validation
to the driver.  Core will only make sure that offloaded programs
are always attached in the driver (or in HW by the driver).  We
trust that drivers which implement offload callbacks will perform
necessary checks.

Moving the checks to the driver is generally a useful thing,
in practice the check should be against a switchdev instance,
not a netdev, given that most ASICs will probably allow using
the same program on many ports.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski
2017-11-20 15:21:54 -08:00
committed by Daniel Borkmann
parent 1f6f4cb7ba
commit 288b3de55a
5 changed files with 27 additions and 25 deletions
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7
net/core/dev.c
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@@ -7139,11 +7139,8 @@ int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
__dev_xdp_attached(dev, bpf_op, NULL))
return -EBUSY;
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);
prog = bpf_prog_get_type_dev(fd, BPF_PROG_TYPE_XDP,
bpf_op == ops->ndo_bpf);
if (IS_ERR(prog))
return PTR_ERR(prog);
}