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sync: auto-generate latest BPF helpers

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Latest changes to BPF helper definitions.
This commit is contained in:
Andrii Nakryiko
2020-06-02 12:45:44 -07:00
committed by Andrii Nakryiko
parent adb5dd203c
commit f2610ca9cf
1 changed files with 43 additions and 0 deletions
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43
src/bpf_helper_defs.h
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@@ -1199,6 +1199,13 @@ static int (*bpf_setsockopt)(void *bpf_socket, int level, int optname, void *opt
* Grow or shrink the room for data in the packet associated to
* *skb* by *len_diff*, and according to the selected *mode*.
*
* By default, the helper will reset any offloaded checksum
* indicator of the skb to CHECKSUM_NONE. This can be avoided
* by the following flag:
*
* * **BPF_F_ADJ_ROOM_NO_CSUM_RESET**: Do not reset offloaded
* checksum data of the skb to CHECKSUM_NONE.
*
* There are two supported modes at this time:
*
* * **BPF_ADJ_ROOM_MAC**: Adjust room at the mac layer
@@ -3118,4 +3125,40 @@ static void (*bpf_ringbuf_discard)(void *data, __u64 flags) = (void *) 133;
*/
static __u64 (*bpf_ringbuf_query)(void *ringbuf, __u64 flags) = (void *) 134;
/*
* bpf_csum_level
*
* Change the skbs checksum level by one layer up or down, or
* reset it entirely to none in order to have the stack perform
* checksum validation. The level is applicable to the following
* protocols: TCP, UDP, GRE, SCTP, FCOE. For example, a decap of
* | ETH | IP | UDP | GUE | IP | TCP | into | ETH | IP | TCP |
* through **bpf_skb_adjust_room**\ () helper with passing in
* **BPF_F_ADJ_ROOM_NO_CSUM_RESET** flag would require one call
* to **bpf_csum_level**\ () with **BPF_CSUM_LEVEL_DEC** since
* the UDP header is removed. Similarly, an encap of the latter
* into the former could be accompanied by a helper call to
* **bpf_csum_level**\ () with **BPF_CSUM_LEVEL_INC** if the
* skb is still intended to be processed in higher layers of the
* stack instead of just egressing at tc.
*
* There are three supported level settings at this time:
*
* * **BPF_CSUM_LEVEL_INC**: Increases skb->csum_level for skbs
* with CHECKSUM_UNNECESSARY.
* * **BPF_CSUM_LEVEL_DEC**: Decreases skb->csum_level for skbs
* with CHECKSUM_UNNECESSARY.
* * **BPF_CSUM_LEVEL_RESET**: Resets skb->csum_level to 0 and
* sets CHECKSUM_NONE to force checksum validation by the stack.
* * **BPF_CSUM_LEVEL_QUERY**: No-op, returns the current
* skb->csum_level.
*
* Returns
* 0 on success, or a negative error in case of failure. In the
* case of **BPF_CSUM_LEVEL_QUERY**, the current skb->csum_level
* is returned or the error code -EACCES in case the skb is not
* subject to CHECKSUM_UNNECESSARY.
*/
static int (*bpf_csum_level)(struct __sk_buff *skb, __u64 level) = (void *) 135;