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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
2020-02-20 11:30:45 -08:00
committed by Andrii Nakryiko
parent c772c9cbde
commit 552af3d963
1 changed files with 30 additions and 9 deletions
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39
src/bpf_helper_defs.h
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@@ -576,9 +576,9 @@ static __u64 (*bpf_perf_event_read)(void *map, __u64 flags) = (void *) 22;
* supports redirection to the egress interface, and accepts no * supports redirection to the egress interface, and accepts no
* flag at all. * flag at all.
* *
* The same effect can be attained with the more generic * The same effect can also be attained with the more generic
* **bpf_redirect_map**\ (), which requires specific maps to be * **bpf_redirect_map**\ (), which uses a BPF map to store the
* used but offers better performance. * redirect target instead of providing it directly to the helper.
* *
* Returns * Returns
* For XDP, the helper returns **XDP_REDIRECT** on success or * For XDP, the helper returns **XDP_REDIRECT** on success or
@@ -1242,14 +1242,12 @@ static int (*bpf_skb_adjust_room)(struct __sk_buff *skb, __s32 len_diff, __u32 m
* the caller. Any higher bits in the *flags* argument must be * the caller. Any higher bits in the *flags* argument must be
* unset. * unset.
* *
* When used to redirect packets to net devices, this helper * See also bpf_redirect(), which only supports redirecting to an
* provides a high performance increase over **bpf_redirect**\ (). * ifindex, but doesn't require a map to do so.
* This is due to various implementation details of the underlying
* mechanisms, one of which is the fact that **bpf_redirect_map**\
* () tries to send packet as a "bulk" to the device.
* *
* Returns * Returns
* **XDP_REDIRECT** on success, or **XDP_ABORTED** on error. * **XDP_REDIRECT** on success, or the value of the two lower bits
* of the **flags* argument on error.
*/ */
static int (*bpf_redirect_map)(void *map, __u32 key, __u64 flags) = (void *) 51; static int (*bpf_redirect_map)(void *map, __u32 key, __u64 flags) = (void *) 51;
@@ -2796,4 +2794,27 @@ static int (*bpf_send_signal_thread)(__u32 sig) = (void *) 117;
*/ */
static __u64 (*bpf_jiffies64)(void) = (void *) 118; static __u64 (*bpf_jiffies64)(void) = (void *) 118;
/*
* bpf_read_branch_records
*
* For an eBPF program attached to a perf event, retrieve the
* branch records (struct perf_branch_entry) associated to *ctx*
* and store it in the buffer pointed by *buf* up to size
* *size* bytes.
*
* Returns
* On success, number of bytes written to *buf*. On error, a
* negative value.
*
* The *flags* can be set to **BPF_F_GET_BRANCH_RECORDS_SIZE** to
* instead return the number of bytes required to store all the
* branch entries. If this flag is set, *buf* may be NULL.
*
* **-EINVAL** if arguments invalid or **size** not a multiple
* of sizeof(struct perf_branch_entry).
*
* **-ENOENT** if architecture does not support branch records.
*/
static int (*bpf_read_branch_records)(struct bpf_perf_event_data *ctx, void *buf, __u32 size, __u64 flags) = (void *) 119;