106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#ifndef NETDATA_EBPF_H
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#define NETDATA_EBPF_H 1
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#include <bpf/bpf.h>
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#include <bpf/libbpf.h>
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#define NETDATA_DEBUGFS "/sys/kernel/debug/tracing/"
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/**
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* The next magic number is got doing the following math:
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* 294960 = 4*65536 + 11*256 + 0
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*
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* For more details, please, read /usr/include/linux/version.h
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*/
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#define NETDATA_MINIMUM_EBPF_KERNEL 264960
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/**
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* The RedHat magic number was got doing:
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*
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* 1797 = 7*256 + 5
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*
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* For more details, please, read /usr/include/linux/version.h
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* in any Red Hat installation.
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*/
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#define NETDATA_MINIMUM_RH_VERSION 1797
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/**
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* 2048 = 8*256 + 0
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*/
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#define NETDATA_RH_8 2048
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/**
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* Kernel 5.10
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*
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* 330240 = 5*65536 + 10*256
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*/
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#define NETDATA_EBPF_KERNEL_5_10 330240
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/**
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* Kernel 4.17
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*
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* 266496 = 4*65536 + 17*256
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*/
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#define NETDATA_EBPF_KERNEL_4_17 266496
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/**
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* Kernel 4.15
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*
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* 265984 = 4*65536 + 15*256
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*/
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#define NETDATA_EBPF_KERNEL_4_15 265984
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/**
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* Kernel 4.11
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*
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* 264960 = 4*65536 + 15*256
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*/
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#define NETDATA_EBPF_KERNEL_4_11 264960
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#define VERSION_STRING_LEN 256
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#define EBPF_KERNEL_REJECT_LIST_FILE "ebpf_kernel_reject_list.txt"
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typedef struct ebpf_data {
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int *map_fd;
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char *kernel_string;
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uint32_t running_on_kernel;
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int isrh;
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} ebpf_data_t;
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typedef enum {
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MODE_RETURN = 0, // This attaches kprobe when the function returns
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MODE_DEVMODE, // This stores log given description about the errors raised
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MODE_ENTRY // This attaches kprobe when the function is called
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} netdata_run_mode_t;
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typedef struct ebpf_module {
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const char *thread_name;
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const char *config_name;
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int enabled;
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void *(*start_routine)(void *);
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int update_time;
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int global_charts;
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int apps_charts;
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netdata_run_mode_t mode;
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uint32_t thread_id;
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int optional;
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} ebpf_module_t;
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#define NETDATA_MAX_PROBES 64
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extern int get_kernel_version(char *out, int size);
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extern int get_redhat_release();
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extern int has_condition_to_run(int version);
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extern char *ebpf_kernel_suffix(int version, int isrh);
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extern int ebpf_update_kernel(ebpf_data_t *ef);
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extern struct bpf_link **ebpf_load_program(char *plugins_dir,
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ebpf_module_t *em,
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char *kernel_string,
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struct bpf_object **obj,
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int *map_fd);
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#endif /* NETDATA_EBPF_H */
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