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| author | Stanislav Fomichev <sdf@google.com> | 2023-01-19 14:15:26 -0800 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2023-01-23 09:38:11 -0800 |
| commit | 3d76a4d3d4e591af3e789698affaad88a5a8e8ab (patch) | |
| tree | a48311526ba1f2f01f4a53c4c738bdbc6b7522a6 /kernel/bpf/core.c | |
| parent | 40535704624e980a560fd68635d98c2984ded572 (diff) | |
| download | linux-3d76a4d3d4e591af3e789698affaad88a5a8e8ab.tar.gz linux-3d76a4d3d4e591af3e789698affaad88a5a8e8ab.tar.bz2 linux-3d76a4d3d4e591af3e789698affaad88a5a8e8ab.zip | |
bpf: XDP metadata RX kfuncs
Define a new kfunc set (xdp_metadata_kfunc_ids) which implements all possible
XDP metatada kfuncs. Not all devices have to implement them. If kfunc is not
supported by the target device, the default implementation is called instead.
The verifier, at load time, replaces a call to the generic kfunc with a call
to the per-device one. Per-device kfunc pointers are stored in separate
struct xdp_metadata_ops.
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Anatoly Burakov <anatoly.burakov@intel.com>
Cc: Alexander Lobakin <alexandr.lobakin@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@gmail.com>
Cc: Maryam Tahhan <mtahhan@redhat.com>
Cc: xdp-hints@xdp-project.net
Cc: netdev@vger.kernel.org
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20230119221536.3349901-8-sdf@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'kernel/bpf/core.c')
| -rw-r--r-- | kernel/bpf/core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 1cf19da3c128..16da51093aff 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -2096,6 +2096,14 @@ bool bpf_prog_map_compatible(struct bpf_map *map, if (fp->kprobe_override) return false; + /* XDP programs inserted into maps are not guaranteed to run on + * a particular netdev (and can run outside driver context entirely + * in the case of devmap and cpumap). Until device checks + * are implemented, prohibit adding dev-bound programs to program maps. + */ + if (bpf_prog_is_dev_bound(fp->aux)) + return false; + spin_lock(&map->owner.lock); if (!map->owner.type) { /* There's no owner yet where we could check for |