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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
2020-07-01 12:39:49 -07:00
committed by Andrii Nakryiko
parent c054d91247
commit 89f7f0796a
1 changed files with 37 additions and 0 deletions
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37
src/bpf_helper_defs.h
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@@ -24,6 +24,7 @@ struct tcp_sock;
struct tcp_timewait_sock;
struct tcp_request_sock;
struct udp6_sock;
struct task_struct;
struct __sk_buff;
struct sk_msg_md;
struct xdp_md;
@@ -3220,4 +3221,40 @@ static struct tcp_request_sock *(*bpf_skc_to_tcp_request_sock)(void *sk) = (void
*/
static struct udp6_sock *(*bpf_skc_to_udp6_sock)(void *sk) = (void *) 140;
/*
* bpf_get_task_stack
*
* Return a user or a kernel stack in bpf program provided buffer.
* To achieve this, the helper needs *task*, which is a valid
* pointer to struct task_struct. To store the stacktrace, the
* bpf program provides *buf* with a nonnegative *size*.
*
* The last argument, *flags*, holds the number of stack frames to
* skip (from 0 to 255), masked with
* **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set
* the following flags:
*
* **BPF_F_USER_STACK**
* Collect a user space stack instead of a kernel stack.
* **BPF_F_USER_BUILD_ID**
* Collect buildid+offset instead of ips for user stack,
* only valid if **BPF_F_USER_STACK** is also specified.
*
* **bpf_get_task_stack**\ () can collect up to
* **PERF_MAX_STACK_DEPTH** both kernel and user frames, subject
* to sufficient large buffer size. Note that
* this limit can be controlled with the **sysctl** program, and
* that it should be manually increased in order to profile long
* user stacks (such as stacks for Java programs). To do so, use:
*
* ::
*
* # sysctl kernel.perf_event_max_stack=<new value>
*
* Returns
* A non-negative value equal to or less than *size* on success,
* or a negative error in case of failure.
*/
static long (*bpf_get_task_stack)(struct task_struct *task, void *buf, __u32 size, __u64 flags) = (void *) 141;