Module helper 

Basic eBPF helper functions module.

Modules

consts

Helper function IDs for BPF programs.

Functions

bpf_ktime_get_ns

Get the current kernel time in nanoseconds.

bpf_probe_read

For tracing programs, safely attempt to read size bytes from kernel space address unsafe_ptr and store the data in dst.

init_helper_functions

Initialize the helper functions map.

map_delete_elem

Delete entry with key from map.

map_for_each_elem

Do some action for each element in map.

map_lookup_elem

Lookup an element in map.

map_lookup_percpu_elem

Lookup an element in percpu map.

map_peek_elem

Get an element from map without removing it.

map_pop_elem

Pop an element from map.

map_push_elem

Push an element value in map.

map_update_elem

Update entry with key in map.

perf_event_output

Output data to a perf event.

printf^⚠

Printf according to the format string, function will return the number of bytes written(including ‘\0’)

probe_read_user_str

Copy a NULL terminated string from an unsafe user address unsafe_ptr to dst.

raw_map_delete_elem

Delete entry with key from map.

raw_map_for_each_elem

For each element in map, call callback_fn function with map, callback_ctx and other map-specific parameters. The callback_fn should be a static function and the callback_ctx should be a pointer to the stack. The flags is used to control certain aspects of the helper. Currently, the flags must be 0.

raw_map_lookup_elem

See https://ebpf-docs.dylanreimerink.nl/linux/helper-function/bpf_map_lookup_elem/

raw_map_lookup_percpu_elem

Perform a lookup in percpu map for an entry associated to key on cpu.

raw_map_peek_elem

Get an element from map without removing it.

raw_map_pop_elem

Pop an element from map.

raw_map_push_elem

Push an element value in map.

raw_map_update_elem

Update entry with key in map.

raw_perf_event_output

See https://ebpf-docs.dylanreimerink.nl/linux/helper-function/bpf_perf_event_output/

trace_printf

See https://ebpf-docs.dylanreimerink.nl/linux/helper-function/bpf_trace_printk/

Type Aliases

RawBPFHelperFn

Type alias for a raw BPF helper function.