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XDP Hints Support through Device Binding #495

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XDP Hints Support through Device Binding #495

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69db259
headers/linux: Update bpf.h to kernel version 6.3
jalalmostafa Mar 23, 2025
fa9f4b4
libxdp: add device binding support
jalalmostafa Apr 3, 2025
80bf6db
libxdp: Add selftest for device binding
jalalmostafa Apr 3, 2025
f5fd714
libxdp: indent test_dispatcher_versions selftest using tabs
jalalmostafa Sep 12, 2025
a97a40c
libxdp: add selftest for dispatcher v2 compatibility
jalalmostafa Sep 12, 2025
e2a7d76
libxdp: skip devbind selftests if no kernel support
jalalmostafa Sep 16, 2025
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2 changes: 2 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -66,3 +66,5 @@ compile_commands.json

# BPF skeleton files
*.skel.h

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735 changes: 485 additions & 250 deletions headers/linux/bpf.h
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4 changes: 4 additions & 0 deletions headers/xdp/libxdp.h
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Expand Up @@ -23,6 +23,9 @@ extern "C" {
#define XDP_BPFFS_MOUNT_ENVVAR "LIBXDP_BPFFS_AUTOMOUNT"
#define XDP_OBJECT_ENVVAR "LIBXDP_OBJECT_PATH"

#define XDP_ATTACH_DEVBIND (1 << 0)
#define XDP_ATTACH_FLAGS (XDP_ATTACH_DEVBIND)

enum xdp_attach_mode {
XDP_MODE_UNSPEC = 0,
XDP_MODE_NATIVE,
Expand Down Expand Up @@ -116,6 +119,7 @@ struct xdp_program *xdp_multiprog__hw_prog(const struct xdp_multiprog *mp);
bool xdp_multiprog__is_legacy(const struct xdp_multiprog *mp);
int xdp_multiprog__program_count(const struct xdp_multiprog *mp);
bool xdp_multiprog__xdp_frags_support(const struct xdp_multiprog *mp);
bool xdp_multiprog__xdp_dev_bound(const struct xdp_multiprog *mp);

/* Only following members can be set at once:
*
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3 changes: 2 additions & 1 deletion headers/xdp/prog_dispatcher.h
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Expand Up @@ -6,7 +6,7 @@
#include <linux/types.h>

#define XDP_METADATA_SECTION "xdp_metadata"
#define XDP_DISPATCHER_VERSION 2
#define XDP_DISPATCHER_VERSION 3

/* magic byte is 'X' + 'D' + 'P' (88+68+80=236) */
#define XDP_DISPATCHER_MAGIC 236
Expand All @@ -29,6 +29,7 @@ struct xdp_dispatcher_config {
__u32 chain_call_actions[MAX_DISPATCHER_ACTIONS];
__u32 run_prios[MAX_DISPATCHER_ACTIONS];
__u32 program_flags[MAX_DISPATCHER_ACTIONS];
__u8 is_xdp_devbound; /* Whether this dispatcher is bounded to a device */
};

#endif
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