diff options
| author | Paul Chaignon <paul.chaignon@gmail.com> | 2023-11-07 22:55:21 +0100 |
|---|---|---|
| committer | Aleksandr Nogikh <nogikh@google.com> | 2023-11-09 18:26:45 +0000 |
| commit | d101c824dacdc6a2bc7d75eff07106452e71c5dc (patch) | |
| tree | 3dc6bcb9b563c294ae43993a9b36a8c0d47e36b1 /sys/linux/bpf.txt | |
| parent | eb146eaf8a525cbaaf511a013d0dbb70bb1207b9 (diff) | |
sys/linux: add BPF_RB_* flags for ringbuf helpers
BPF helpers bpf_ringbuf_{discard,submit,output} take a set of flags.
This commit describes those flags.
The default is a zero value, but the kernel doesn't have a macro for
that. Thus, "0" is simply added to the flag definition.
Note bpf_ringbuf_reserve also has a flags argument, but it is currently
unused on the kernel side.
Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
Diffstat (limited to 'sys/linux/bpf.txt')
| -rw-r--r-- | sys/linux/bpf.txt | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sys/linux/bpf.txt b/sys/linux/bpf.txt index c66ab24b5..b0166b0cd 100644 --- a/sys/linux/bpf.txt +++ b/sys/linux/bpf.txt @@ -478,6 +478,7 @@ type bpf_insn_alu_t[CLASS_TYPE, CLASS, SOURCE_TYPE, SOURCE, OP_TYPE, OP, DST, SR type bpf_insn_alu bpf_insn_alu_t[flags, bpf_alu_insn, flags, bpf_alu_source, flags, bpf_alu_op, flags[bpf_reg, int8:4], flags[bpf_reg, int8:4], flags[bpf_insn_offsets, int16], flags[bpf_insn_immediates, int32]] type bpf_insn_mov_imm[DST, IMM] bpf_insn_alu_t[const, BPF_ALU64, const, BPF_K0, const, BPF_MOV0, const[DST, int8:4], const[0, int8:4], const[0, int16], const[IMM, int32]] type bpf_insn_mov_imm_any[DST] bpf_insn_alu_t[const, BPF_ALU64, const, BPF_K0, const, BPF_MOV0, const[DST, int8:4], const[0, int8:4], const[0, int16], int32] +type bpf_insn_mov_imm_flag[DST, FLAG] bpf_insn_alu_t[const, BPF_ALU64, const, BPF_K0, const, BPF_MOV0, const[DST, int8:4], const[0, int8:4], const[0, int16], flags[FLAG, int32]] type bpf_insn_mov_reg[SRC, DST] bpf_insn_alu_t[const, BPF_ALU64, const, BPF_X0, const, BPF_MOV0, const[DST, int8:4], const[SRC, int8:4], const[0, int16], const[0, int32]] type bpf_insn_op_imm[DST, OP, IMM] bpf_insn_alu_t[const, BPF_ALU64, const, BPF_K0, const, OP, const[DST, int8:4], const[0, int8:4], const[0, int16], const[IMM, int32]] @@ -775,12 +776,12 @@ bpf_insn_ringbuf_reserve { } # (bf) r1 = r9 -# (b7) r2 = 0 +# (b7) r2 = BPF_RB_X # (85) call bpf_ringbuf_{submit,discard}#322192 # (bf) r0 = 0 bpf_insn_ringbuf_free { insn1 bpf_insn_mov_reg[BPF_REG_9, BPF_REG_1] - insn2 bpf_insn_mov_imm[BPF_REG_2, 0] + insn2 bpf_insn_mov_imm_flag[BPF_REG_2, bpf_ringbuf_wakeup_flags] insn3 bpf_insn_call_helper_t[flags[bpf_helpers_ringbuf_free, int32]] insn4 bpf_insn_mov_imm[BPF_REG_0, 0] } @@ -802,7 +803,7 @@ bpf_insn_ringbuf_query { # (bf) r2 = r10 # (07) r2 += -8 # (b7) r3 = 8 -# (b7) r4 = 0 +# (b7) r4 = BPF_RB_X # (85) call bpf_ringbuf_output#322192 bpf_insn_ringbuf_output { insn1 bpf_insn_tail_call_map_fd[BPF_REG_1] @@ -811,7 +812,7 @@ bpf_insn_ringbuf_output { insn4 bpf_insn_mov_reg[BPF_REG_10, BPF_REG_2] insn5 bpf_insn_op_imm[BPF_REG_2, BPF_ADD0, -8] insn6 bpf_insn_mov_imm[BPF_REG_3, 8] - insn7 bpf_insn_mov_imm[BPF_REG_4, 0] + insn7 bpf_insn_mov_imm_flag[BPF_REG_4, bpf_ringbuf_wakeup_flags] insn8 bpf_insn_call_helper_t[const[BPF_FUNC_ringbuf_output, int32]] } @@ -1285,3 +1286,4 @@ bpf_link_create_kprobe_multi_flags = BPF_F_KPROBE_MULTI_RETURN nf_dev_hooks = NF_NETDEV_INGRESS, NF_NETDEV_EGRESS bpf_link_create_netfilter_flags = BPF_F_NETFILTER_IP_DEFRAG bpf_link_create_uprobe_multi_flags = BPF_F_UPROBE_MULTI_RETURN +bpf_ringbuf_wakeup_flags = 0, BPF_RB_NO_WAKEUP, BPF_RB_FORCE_WAKEUP |