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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 11:08:07 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 11:08:07 +0000 |
commit | c69cb8cc094cc916adbc516b09e944cd3d137c01 (patch) | |
tree | f2878ec41fb6d0e3613906c6722fc02b934eeb80 /libnetdata/ebpf/ebpf.h | |
parent | Initial commit. (diff) | |
download | netdata-c69cb8cc094cc916adbc516b09e944cd3d137c01.tar.xz netdata-c69cb8cc094cc916adbc516b09e944cd3d137c01.zip |
Adding upstream version 1.29.3.upstream/1.29.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libnetdata/ebpf/ebpf.h')
-rw-r--r-- | libnetdata/ebpf/ebpf.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/libnetdata/ebpf/ebpf.h b/libnetdata/ebpf/ebpf.h new file mode 100644 index 0000000..d4faccf --- /dev/null +++ b/libnetdata/ebpf/ebpf.h @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_EBPF_H +#define NETDATA_EBPF_H 1 + +#include <bpf/bpf.h> +#include <bpf/libbpf.h> + +#define NETDATA_DEBUGFS "/sys/kernel/debug/tracing/" + +/** + * The next magic number is got doing the following math: + * 294960 = 4*65536 + 11*256 + 0 + * + * For more details, please, read /usr/include/linux/version.h + */ +#define NETDATA_MINIMUM_EBPF_KERNEL 264960 + +/** + * The RedHat magic number was got doing: + * + * 1797 = 7*256 + 5 + * + * For more details, please, read /usr/include/linux/version.h + * in any Red Hat installation. + */ +#define NETDATA_MINIMUM_RH_VERSION 1797 + +/** + * 2048 = 8*256 + 0 + */ +#define NETDATA_RH_8 2048 + +/** + * Kernel 5.10 + * + * 330240 = 5*65536 + 10*256 + */ +#define NETDATA_EBPF_KERNEL_5_10 330240 + +/** + * Kernel 4.17 + * + * 266496 = 4*65536 + 17*256 + */ +#define NETDATA_EBPF_KERNEL_4_17 266496 + +/** + * Kernel 4.15 + * + * 265984 = 4*65536 + 15*256 + */ +#define NETDATA_EBPF_KERNEL_4_15 265984 + +/** + * Kernel 4.11 + * + * 264960 = 4*65536 + 15*256 + */ +#define NETDATA_EBPF_KERNEL_4_11 264960 + +#define VERSION_STRING_LEN 256 +#define EBPF_KERNEL_REJECT_LIST_FILE "ebpf_kernel_reject_list.txt" + +typedef struct ebpf_data { + int *map_fd; + + char *kernel_string; + uint32_t running_on_kernel; + int isrh; +} ebpf_data_t; + +typedef enum { + MODE_RETURN = 0, // This attaches kprobe when the function returns + MODE_DEVMODE, // This stores log given description about the errors raised + MODE_ENTRY // This attaches kprobe when the function is called +} netdata_run_mode_t; + +typedef struct ebpf_module { + const char *thread_name; + const char *config_name; + int enabled; + void *(*start_routine)(void *); + int update_time; + int global_charts; + int apps_charts; + netdata_run_mode_t mode; + uint32_t thread_id; + int optional; +} ebpf_module_t; + +#define NETDATA_MAX_PROBES 64 + +extern int get_kernel_version(char *out, int size); +extern int get_redhat_release(); +extern int has_condition_to_run(int version); +extern char *ebpf_kernel_suffix(int version, int isrh); +extern int ebpf_update_kernel(ebpf_data_t *ef); +extern struct bpf_link **ebpf_load_program(char *plugins_dir, + ebpf_module_t *em, + char *kernel_string, + struct bpf_object **obj, + int *map_fd); + +#endif /* NETDATA_EBPF_H */ |