Evolution-X-Devices/kernel_samsung_a71
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BACKPORT: 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.

Change-Id: I4e592fd1286dc91834bcf6e5134ef52d7231bc40
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 Samuel Pascua
parent 9ebb87cc5b
commit d84c881552
2 changed files with 11 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/bpf.h
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@@ -787,8 +787,9 @@ int bpf_map_offload_get_next_key(struct bpf_map *map,
bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
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);
void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
struct net_device *netdev);
void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,

10
kernel/bpf/offload.c
View File

@@ -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;
@@ -690,6 +691,7 @@ 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;
@@ -702,3 +704,9 @@ 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);