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bpf: introduce BPF_F_XDP_HAS_FRAGS flag in prog_flags loading the ebpf program 

Introduce BPF_F_XDP_HAS_FRAGS and the related field in bpf_prog_aux
in order to notify the driver the loaded program support xdp frags.

Acked-by: Toke Hoiland-Jorgensen <toke@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/db2e8075b7032a356003f407d1b0deb99adaa0ed.1642758637.git.lorenzo@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2022-01-21 11:09:52 +01:00 committed by Alexei Starovoitov
parent c41ced023a
commit c2f2cdbeff
4 changed files with 14 additions and 1 deletions
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1
include/linux/bpf.h
View File

@ -933,6 +933,7 @@ struct bpf_prog_aux {
bool func_proto_unreliable;
bool sleepable;
bool tail_call_reachable;
bool xdp_has_frags;
struct hlist_node tramp_hlist;
/* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
const struct btf_type *attach_func_proto;

5
include/uapi/linux/bpf.h
View File

@ -1113,6 +1113,11 @@ enum bpf_link_type {
*/
#define BPF_F_SLEEPABLE (1U << 4)
/* If BPF_F_XDP_HAS_FRAGS is used in BPF_PROG_LOAD command, the loaded program
* fully support xdp frags.
*/
#define BPF_F_XDP_HAS_FRAGS (1U << 5)
/* When BPF ldimm64's insn[0].src_reg != 0 then this can have
* the following extensions:
*

4
kernel/bpf/syscall.c
View File

@ -2217,7 +2217,8 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr)
BPF_F_ANY_ALIGNMENT |
BPF_F_TEST_STATE_FREQ |
BPF_F_SLEEPABLE |
BPF_F_TEST_RND_HI32))
BPF_F_TEST_RND_HI32 |
BPF_F_XDP_HAS_FRAGS))
return -EINVAL;
if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
@ -2303,6 +2304,7 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr)
prog->aux->dst_prog = dst_prog;
prog->aux->offload_requested = !!attr->prog_ifindex;
prog->aux->sleepable = attr->prog_flags & BPF_F_SLEEPABLE;
prog->aux->xdp_has_frags = attr->prog_flags & BPF_F_XDP_HAS_FRAGS;
err = security_bpf_prog_alloc(prog->aux);
if (err)

5
tools/include/uapi/linux/bpf.h
View File

@ -1113,6 +1113,11 @@ enum bpf_link_type {
*/
#define BPF_F_SLEEPABLE (1U << 4)
/* If BPF_F_XDP_HAS_FRAGS is used in BPF_PROG_LOAD command, the loaded program
* fully support xdp frags.
*/
#define BPF_F_XDP_HAS_FRAGS (1U << 5)
/* When BPF ldimm64's insn[0].src_reg != 0 then this can have
* the following extensions:
*