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bpf: offload: add priv field for drivers

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Currently bpf_offload_dev does not have any priv pointer, forcing
the drivers to work backwards from the netdev in program metadata.
This is not great given programs are conceptually associated with
the offload device, and it means one or two unnecessary deferences.
Add a priv pointer to bpf_offload_dev.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2019-02-12 00:20:39 -08:00 • committed by Daniel Borkmann
parent ebbed0f46e
commit dd27c2e3d0
5 changed files with 16 additions and 8 deletions
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10
kernel/bpf/offload.c
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@ -35,6 +35,7 @@ static DECLARE_RWSEM(bpf_devs_lock);
struct bpf_offload_dev {
const struct bpf_prog_offload_ops *ops;
struct list_head netdevs;
void *priv;
};
struct bpf_offload_netdev {
@ -669,7 +670,7 @@ unlock:
EXPORT_SYMBOL_GPL(bpf_offload_dev_netdev_unregister);
struct bpf_offload_dev *
bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops)
bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv)
{
struct bpf_offload_dev *offdev;
int err;
@ -688,6 +689,7 @@ bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops)
return ERR_PTR(-ENOMEM);
offdev->ops = ops;
offdev->priv = priv;
INIT_LIST_HEAD(&offdev->netdevs);
return offdev;
@ -700,3 +702,9 @@ void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev)
kfree(offdev);
}
EXPORT_SYMBOL_GPL(bpf_offload_dev_destroy);
void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev)
{
return offdev->priv;
}
EXPORT_SYMBOL_GPL(bpf_offload_dev_priv);