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bpf: offload: keep the offload state per-ASIC

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Create a higher-level entity to represent a device/ASIC to allow
programs and maps to be shared between device ports.  The extra
work is required to make sure we don't destroy BPF objects as
soon as the netdev for which they were loaded gets destroyed,
as other ports may still be using them.  When netdev goes away
all of its BPF objects will be moved to other netdevs of the
device, and only destroyed when last netdev is unregistered.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski
2018-07-17 10:53:25 -07:00
committed by Daniel Borkmann
parent 9fd7c55591
commit 602144c224
6 changed files with 103 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/ethernet/netronome/nfp/bpf/main.c
View File

@@ -406,12 +406,16 @@ err_release_free:
static int nfp_bpf_ndo_init(struct nfp_app *app, struct net_device *netdev)
{
return bpf_offload_dev_netdev_register(netdev);
struct nfp_app_bpf *bpf = app->priv;
return bpf_offload_dev_netdev_register(bpf->bpf_dev, netdev);
}
static void nfp_bpf_ndo_uninit(struct nfp_app *app, struct net_device *netdev)
{
bpf_offload_dev_netdev_unregister(netdev);
struct nfp_app_bpf *bpf = app->priv;
bpf_offload_dev_netdev_unregister(bpf->bpf_dev, netdev);
}
static int nfp_bpf_init(struct nfp_app *app)
@@ -437,6 +441,11 @@ static int nfp_bpf_init(struct nfp_app *app)
if (err)
goto err_free_neutral_maps;
bpf->bpf_dev = bpf_offload_dev_create();
err = PTR_ERR_OR_ZERO(bpf->bpf_dev);
if (err)
goto err_free_neutral_maps;
return 0;
err_free_neutral_maps:
@@ -455,6 +464,7 @@ static void nfp_bpf_clean(struct nfp_app *app)
{
struct nfp_app_bpf *bpf = app->priv;
bpf_offload_dev_destroy(bpf->bpf_dev);
WARN_ON(!skb_queue_empty(&bpf->cmsg_replies));
WARN_ON(!list_empty(&bpf->map_list));
WARN_ON(bpf->maps_in_use || bpf->map_elems_in_use);

4
drivers/net/ethernet/netronome/nfp/bpf/main.h
View File

@@ -110,6 +110,8 @@ enum pkt_vec {
* struct nfp_app_bpf - bpf app priv structure
* @app: backpointer to the app
*
* @bpf_dev: BPF offload device handle
*
* @tag_allocator: bitmap of control message tags in use
* @tag_alloc_next: next tag bit to allocate
* @tag_alloc_last: next tag bit to be freed
@@ -150,6 +152,8 @@ enum pkt_vec {
struct nfp_app_bpf {
struct nfp_app *app;
struct bpf_offload_dev *bpf_dev;
DECLARE_BITMAP(tag_allocator, U16_MAX + 1);
u16 tag_alloc_next;
u16 tag_alloc_last;