diff options
Diffstat (limited to 'libnetdata/ebpf/ebpf.h')
| -rw-r--r-- | libnetdata/ebpf/ebpf.h | 132 |
1 files changed, 88 insertions, 44 deletions
diff --git a/libnetdata/ebpf/ebpf.h b/libnetdata/ebpf/ebpf.h index 73128f52..12529967 100644 --- a/libnetdata/ebpf/ebpf.h +++ b/libnetdata/ebpf/ebpf.h @@ -23,14 +23,6 @@ #define EBPF_CFG_CGROUP "cgroups" /** - * 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 @@ -46,46 +38,63 @@ #define NETDATA_RH_8 2048 /** - * Kernel 5.11 + * Kernel Version * - * 330240 = 5*65536 + 11*256 - */ -#define NETDATA_EBPF_KERNEL_5_11 330496 - -/** - * Kernel 5.10 + * Kernel versions are calculated using the following formula: * - * 330240 = 5*65536 + 10*256 - */ -#define NETDATA_EBPF_KERNEL_5_10 330240 - -/** - * Kernel 5.0 + * VERSION = LINUX_VERSION_MAJOR*65536 + LINUX_VERSION_PATCHLEVEL*256 + LINUX_VERSION_SUBLEVEL * - * 327680 = 5*65536 +256*0 - */ -#define NETDATA_EBPF_KERNEL_5_0 327680 - -/** - * Kernel 4.17 + * Where LINUX_VERSION_MAJOR, LINUX_VERSION_PATCHLEVEL, and LINUX_VERSION_SUBLEVEL are extracted + * from /usr/include/linux/version.h. * - * 266496 = 4*65536 + 17*256 - */ -#define NETDATA_EBPF_KERNEL_4_17 266496 - -/** - * Kernel 4.15 + * LINUX_VERSION_SUBLEVEL has the maximum value 255, but linux can have more SUBLEVELS. * - * 265984 = 4*65536 + 15*256 */ -#define NETDATA_EBPF_KERNEL_4_15 265984 +enum netdata_ebpf_kernel_versions { + NETDATA_EBPF_KERNEL_4_11 = 264960, // 264960 = 4 * 65536 + 15 * 256 + NETDATA_EBPF_KERNEL_4_15 = 265984, // 265984 = 4 * 65536 + 15 * 256 + NETDATA_EBPF_KERNEL_4_17 = 266496, // 266496 = 4 * 65536 + 17 * 256 + NETDATA_EBPF_KERNEL_5_0 = 327680, // 327680 = 5 * 65536 + 0 * 256 + NETDATA_EBPF_KERNEL_5_10 = 330240, // 330240 = 5 * 65536 + 10 * 256 + NETDATA_EBPF_KERNEL_5_11 = 330496, // 330240 = 5 * 65536 + 11 * 256 + NETDATA_EBPF_KERNEL_5_15 = 331520 // 331520 = 5 * 65536 + 15 * 256 +}; + +enum netdata_kernel_flag { + NETDATA_V3_10 = 1 << 0, + NETDATA_V4_14 = 1 << 1, + NETDATA_V4_16 = 1 << 2, + NETDATA_V4_18 = 1 << 3, + NETDATA_V5_4 = 1 << 4, + NETDATA_V5_10 = 1 << 5, + NETDATA_V5_11 = 1 << 6, + NETDATA_V5_15 = 1 << 7 +}; + +enum netdata_kernel_idx { + NETDATA_IDX_V3_10, + NETDATA_IDX_V4_14, + NETDATA_IDX_V4_16, + NETDATA_IDX_V4_18, + NETDATA_IDX_V5_4 , + NETDATA_IDX_V5_10, + NETDATA_IDX_V5_11, + NETDATA_IDX_V5_15 +}; + +#define NETDATA_IDX_STR_V3_10 "3.10" +#define NETDATA_IDX_STR_V4_14 "4.14" +#define NETDATA_IDX_STR_V4_16 "4.16" +#define NETDATA_IDX_STR_V4_18 "4.18" +#define NETDATA_IDX_STR_V5_4 "5.4" +#define NETDATA_IDX_STR_V5_10 "5.10" +#define NETDATA_IDX_STR_V5_11 "5.11" +#define NETDATA_IDX_STR_V5_15 "5.15" /** - * Kernel 4.11 - * - * 264960 = 4*65536 + 15*256 + * Minimum value has relationship with libbpf support. */ -#define NETDATA_EBPF_KERNEL_4_11 264960 +#define NETDATA_MINIMUM_EBPF_KERNEL NETDATA_EBPF_KERNEL_4_11 #define VERSION_STRING_LEN 256 #define EBPF_KERNEL_REJECT_LIST_FILE "ebpf_kernel_reject_list.txt" @@ -148,6 +157,39 @@ typedef struct ebpf_specify_name { bool retprobe; } ebpf_specify_name_t; +typedef enum netdata_ebpf_load_mode { + EBPF_LOAD_LEGACY, // Select legacy mode, this means we will load binaries + EBPF_LOAD_CORE, // When CO-RE is used, it is necessary to use the souce code + + EBPF_LOAD_PLAY_DICE // Take a look on environment and choose the best option +} netdata_ebpf_load_mode_t; + +typedef enum netdata_ebpf_program_loaded { + EBPF_LOAD_PROBE, // Attach probes on targets + EBPF_LOAD_RETPROBE, // Attach retprobes on targets + EBPF_LOAD_TRACEPOINT, // This stores log given description about the errors raised + EBPF_LOAD_TRAMPOLINE, // This attaches kprobe when the function is called +} netdata_ebpf_program_loaded_t; + +typedef struct netdata_ebpf_targets { + char *name; + netdata_ebpf_program_loaded_t mode; +} netdata_ebpf_targets_t; + +typedef struct ebpf_plugin_stats { + // Load options + uint32_t legacy; // Legacy codes + uint32_t core; // CO-RE codes, this means we are using source code compiled. + + uint32_t threads; // Total number of threads + uint32_t running; // total number of threads running + + uint32_t probes; // Number of kprobes loaded + uint32_t retprobes; // Number of kretprobes loaded + uint32_t tracepoints; // Number of tracepoints used + uint32_t trampolines; // Number of trampolines used +} ebpf_plugin_stats_t; + typedef struct ebpf_module { const char *thread_name; const char *config_name; @@ -166,25 +208,27 @@ typedef struct ebpf_module { uint32_t pid_map_size; struct config *cfg; const char *config_file; + uint64_t kernels; + netdata_ebpf_load_mode_t load; + netdata_ebpf_targets_t *targets; } ebpf_module_t; extern int ebpf_get_kernel_version(); extern int get_redhat_release(); extern int has_condition_to_run(int version); extern char *ebpf_kernel_suffix(int version, int isrh); -extern void ebpf_update_kernel(char *ks, size_t length, int isrh, int version); -extern struct bpf_link **ebpf_load_program(char *plugins_dir, - ebpf_module_t *em, - char *kernel_string, - struct bpf_object **obj); +extern struct bpf_link **ebpf_load_program(char *plugins_dir, ebpf_module_t *em, int kver, int is_rhf, + struct bpf_object **obj); extern void ebpf_mount_config_name(char *filename, size_t length, char *path, const char *config); extern int ebpf_load_config(struct config *config, char *filename); extern void ebpf_update_module(ebpf_module_t *em); extern void ebpf_update_names(ebpf_specify_name_t *opt, ebpf_module_t *em); +extern char *ebpf_find_symbol(char *search); extern void ebpf_load_addresses(ebpf_addresses_t *fa, int fd); extern void ebpf_fill_algorithms(int *algorithms, size_t length, int algorithm); extern char **ebpf_fill_histogram_dimension(size_t maximum); +extern void ebpf_update_stats(ebpf_plugin_stats_t *report, ebpf_module_t *em); // Histogram #define NETDATA_EBPF_HIST_MAX_BINS 24UL |