diff options
Diffstat (limited to 'collectors/ebpf.plugin/ebpf_dcstat.c')
| -rw-r--r-- | collectors/ebpf.plugin/ebpf_dcstat.c | 1420 |
1 files changed, 0 insertions, 1420 deletions
diff --git a/collectors/ebpf.plugin/ebpf_dcstat.c b/collectors/ebpf.plugin/ebpf_dcstat.c deleted file mode 100644 index 4ff6c82a..00000000 --- a/collectors/ebpf.plugin/ebpf_dcstat.c +++ /dev/null @@ -1,1420 +0,0 @@ -// SPDX-License-Identifier: GPL-3.0-or-later - -#include "ebpf.h" -#include "ebpf_dcstat.h" - -static char *dcstat_counter_dimension_name[NETDATA_DCSTAT_IDX_END] = { "ratio", "reference", "slow", "miss" }; -static netdata_syscall_stat_t dcstat_counter_aggregated_data[NETDATA_DCSTAT_IDX_END]; -static netdata_publish_syscall_t dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_END]; - -netdata_dcstat_pid_t *dcstat_vector = NULL; - -static netdata_idx_t dcstat_hash_values[NETDATA_DCSTAT_IDX_END]; -static netdata_idx_t *dcstat_values = NULL; - -struct config dcstat_config = { .first_section = NULL, - .last_section = NULL, - .mutex = NETDATA_MUTEX_INITIALIZER, - .index = { .avl_tree = { .root = NULL, .compar = appconfig_section_compare }, - .rwlock = AVL_LOCK_INITIALIZER } }; - -ebpf_local_maps_t dcstat_maps[] = {{.name = "dcstat_global", .internal_input = NETDATA_DIRECTORY_CACHE_END, - .user_input = 0, .type = NETDATA_EBPF_MAP_STATIC, - .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_ARRAY -#endif - }, - {.name = "dcstat_pid", .internal_input = ND_EBPF_DEFAULT_PID_SIZE, - .user_input = 0, - .type = NETDATA_EBPF_MAP_RESIZABLE | NETDATA_EBPF_MAP_PID, - .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_HASH -#endif - }, - {.name = "dcstat_ctrl", .internal_input = NETDATA_CONTROLLER_END, - .user_input = 0, - .type = NETDATA_EBPF_MAP_CONTROLLER, - .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_ARRAY -#endif - }, - {.name = NULL, .internal_input = 0, .user_input = 0, - .type = NETDATA_EBPF_MAP_CONTROLLER, - .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_ARRAY -#endif - }}; - -static ebpf_specify_name_t dc_optional_name[] = { {.program_name = "netdata_lookup_fast", - .function_to_attach = "lookup_fast", - .optional = NULL, - .retprobe = CONFIG_BOOLEAN_NO}, - {.program_name = NULL}}; - -netdata_ebpf_targets_t dc_targets[] = { {.name = "lookup_fast", .mode = EBPF_LOAD_TRAMPOLINE}, - {.name = "d_lookup", .mode = EBPF_LOAD_TRAMPOLINE}, - {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}}; - -#ifdef NETDATA_DEV_MODE -int dcstat_disable_priority; -#endif - -#ifdef LIBBPF_MAJOR_VERSION -/** - * Disable probe - * - * Disable all probes to use exclusively another method. - * - * @param obj is the main structure for bpf objects - */ -static inline void ebpf_dc_disable_probes(struct dc_bpf *obj) -{ - bpf_program__set_autoload(obj->progs.netdata_lookup_fast_kprobe, false); - bpf_program__set_autoload(obj->progs.netdata_d_lookup_kretprobe, false); - bpf_program__set_autoload(obj->progs.netdata_dcstat_release_task_kprobe, false); -} - -/* - * Disable trampoline - * - * Disable all trampoline to use exclusively another method. - * - * @param obj is the main structure for bpf objects. - */ -static inline void ebpf_dc_disable_trampoline(struct dc_bpf *obj) -{ - bpf_program__set_autoload(obj->progs.netdata_lookup_fast_fentry, false); - bpf_program__set_autoload(obj->progs.netdata_d_lookup_fexit, false); - bpf_program__set_autoload(obj->progs.netdata_dcstat_release_task_fentry, false); -} - -/** - * Set trampoline target - * - * Set the targets we will monitor. - * - * @param obj is the main structure for bpf objects. - */ -static void ebpf_dc_set_trampoline_target(struct dc_bpf *obj) -{ - bpf_program__set_attach_target(obj->progs.netdata_lookup_fast_fentry, 0, - dc_targets[NETDATA_DC_TARGET_LOOKUP_FAST].name); - - bpf_program__set_attach_target(obj->progs.netdata_d_lookup_fexit, 0, - dc_targets[NETDATA_DC_TARGET_D_LOOKUP].name); - - bpf_program__set_attach_target(obj->progs.netdata_dcstat_release_task_fentry, 0, - EBPF_COMMON_FNCT_CLEAN_UP); -} - -/** - * Mount Attach Probe - * - * Attach probes to target - * - * @param obj is the main structure for bpf objects. - * - * @return It returns 0 on success and -1 otherwise. - */ -static int ebpf_dc_attach_probes(struct dc_bpf *obj) -{ - obj->links.netdata_d_lookup_kretprobe = bpf_program__attach_kprobe(obj->progs.netdata_d_lookup_kretprobe, - true, - dc_targets[NETDATA_DC_TARGET_D_LOOKUP].name); - int ret = libbpf_get_error(obj->links.netdata_d_lookup_kretprobe); - if (ret) - return -1; - - char *lookup_name = (dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].optional) ? - dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].optional : - dc_targets[NETDATA_DC_TARGET_LOOKUP_FAST].name ; - - obj->links.netdata_lookup_fast_kprobe = bpf_program__attach_kprobe(obj->progs.netdata_lookup_fast_kprobe, - false, - lookup_name); - ret = libbpf_get_error(obj->links.netdata_lookup_fast_kprobe); - if (ret) - return -1; - - obj->links.netdata_dcstat_release_task_kprobe = bpf_program__attach_kprobe(obj->progs.netdata_dcstat_release_task_kprobe, - false, - EBPF_COMMON_FNCT_CLEAN_UP); - ret = libbpf_get_error(obj->links.netdata_dcstat_release_task_kprobe); - if (ret) - return -1; - - return 0; -} - -/** - * Adjust Map Size - * - * Resize maps according input from users. - * - * @param obj is the main structure for bpf objects. - * @param em structure with configuration - */ -static void ebpf_dc_adjust_map(struct dc_bpf *obj, ebpf_module_t *em) -{ - ebpf_update_map_size(obj->maps.dcstat_pid, &dcstat_maps[NETDATA_DCSTAT_PID_STATS], - em, bpf_map__name(obj->maps.dcstat_pid)); - - ebpf_update_map_type(obj->maps.dcstat_global, &dcstat_maps[NETDATA_DCSTAT_GLOBAL_STATS]); - ebpf_update_map_type(obj->maps.dcstat_pid, &dcstat_maps[NETDATA_DCSTAT_PID_STATS]); - ebpf_update_map_type(obj->maps.dcstat_ctrl, &dcstat_maps[NETDATA_DCSTAT_CTRL]); -} - -/** - * Set hash tables - * - * Set the values for maps according the value given by kernel. - * - * @param obj is the main structure for bpf objects. - */ -static void ebpf_dc_set_hash_tables(struct dc_bpf *obj) -{ - dcstat_maps[NETDATA_DCSTAT_GLOBAL_STATS].map_fd = bpf_map__fd(obj->maps.dcstat_global); - dcstat_maps[NETDATA_DCSTAT_PID_STATS].map_fd = bpf_map__fd(obj->maps.dcstat_pid); - dcstat_maps[NETDATA_DCSTAT_CTRL].map_fd = bpf_map__fd(obj->maps.dcstat_ctrl); -} - -/** - * Update Load - * - * For directory cache, some distributions change the function name, and we do not have condition to use - * TRAMPOLINE like other functions. - * - * @param em structure with configuration - * - * @return When then symbols were not modified, it returns TRAMPOLINE, else it returns RETPROBE. - */ -netdata_ebpf_program_loaded_t ebpf_dc_update_load(ebpf_module_t *em) -{ - if (!strcmp(dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].optional, - dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].function_to_attach)) - return EBPF_LOAD_TRAMPOLINE; - - if (em->targets[NETDATA_DC_TARGET_LOOKUP_FAST].mode != EBPF_LOAD_RETPROBE) - netdata_log_info("When your kernel was compiled the symbol %s was modified, instead to use `trampoline`, the plugin will use `probes`.", - dc_optional_name[NETDATA_DC_TARGET_LOOKUP_FAST].function_to_attach); - - return EBPF_LOAD_RETPROBE; -} - -/** - * Disable Release Task - * - * Disable release task when apps is not enabled. - * - * @param obj is the main structure for bpf objects. - */ -static void ebpf_dc_disable_release_task(struct dc_bpf *obj) -{ - bpf_program__set_autoload(obj->progs.netdata_dcstat_release_task_kprobe, false); - bpf_program__set_autoload(obj->progs.netdata_dcstat_release_task_fentry, false); -} - -/** - * Load and attach - * - * Load and attach the eBPF code in kernel. - * - * @param obj is the main structure for bpf objects. - * @param em structure with configuration - * - * @return it returns 0 on success and -1 otherwise - */ -static inline int ebpf_dc_load_and_attach(struct dc_bpf *obj, ebpf_module_t *em) -{ - netdata_ebpf_program_loaded_t test = ebpf_dc_update_load(em); - if (test == EBPF_LOAD_TRAMPOLINE) { - ebpf_dc_disable_probes(obj); - - ebpf_dc_set_trampoline_target(obj); - } else { - ebpf_dc_disable_trampoline(obj); - } - - ebpf_dc_adjust_map(obj, em); - - if (!em->apps_charts && !em->cgroup_charts) - ebpf_dc_disable_release_task(obj); - - int ret = dc_bpf__load(obj); - if (ret) { - return ret; - } - - ret = (test == EBPF_LOAD_TRAMPOLINE) ? dc_bpf__attach(obj) : ebpf_dc_attach_probes(obj); - if (!ret) { - ebpf_dc_set_hash_tables(obj); - - ebpf_update_controller(dcstat_maps[NETDATA_DCSTAT_CTRL].map_fd, em); - } - - return ret; -} -#endif - -/***************************************************************** - * - * COMMON FUNCTIONS - * - *****************************************************************/ - -/** - * Update publish - * - * Update publish values before to write dimension. - * - * @param out structure that will receive data. - * @param cache_access number of access to directory cache. - * @param not_found number of files not found on the file system - */ -void dcstat_update_publish(netdata_publish_dcstat_t *out, uint64_t cache_access, uint64_t not_found) -{ - NETDATA_DOUBLE successful_access = (NETDATA_DOUBLE) (((long long)cache_access) - ((long long)not_found)); - NETDATA_DOUBLE ratio = (cache_access) ? successful_access/(NETDATA_DOUBLE)cache_access : 0; - - out->ratio = (long long )(ratio*100); -} - -/***************************************************************** - * - * FUNCTIONS TO CLOSE THE THREAD - * - *****************************************************************/ - -static void ebpf_obsolete_specific_dc_charts(char *type, int update_every); - -/** - * Obsolete services - * - * Obsolete all service charts created - * - * @param em a pointer to `struct ebpf_module` - */ -static void ebpf_obsolete_dc_services(ebpf_module_t *em) -{ - ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, - NETDATA_DC_HIT_CHART, - "", - "Percentage of files inside directory cache", - EBPF_COMMON_DIMENSION_PERCENTAGE, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_SYSTEMD_DC_HIT_RATIO_CONTEXT, - 21200, - em->update_every); - - ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, - NETDATA_DC_REFERENCE_CHART, - "", - "Count file access", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_SYSTEMD_DC_REFERENCE_CONTEXT, - 21201, - em->update_every); - - ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, - NETDATA_DC_REQUEST_NOT_CACHE_CHART, - "", - "Files not present inside directory cache", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_SYSTEMD_DC_NOT_CACHE_CONTEXT, - 21202, - em->update_every); - - ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, - NETDATA_DC_REQUEST_NOT_FOUND_CHART, - "", - "Files not found", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_SYSTEMD_DC_NOT_FOUND_CONTEXT, - 21202, - em->update_every); -} - -/** - * Obsolete cgroup chart - * - * Send obsolete for all charts created before to close. - * - * @param em a pointer to `struct ebpf_module` - */ -static inline void ebpf_obsolete_dc_cgroup_charts(ebpf_module_t *em) { - pthread_mutex_lock(&mutex_cgroup_shm); - - ebpf_obsolete_dc_services(em); - - ebpf_cgroup_target_t *ect; - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (ect->systemd) - continue; - - ebpf_obsolete_specific_dc_charts(ect->name, em->update_every); - } - pthread_mutex_unlock(&mutex_cgroup_shm); -} - -/** - * Obsolette apps charts - * - * Obsolete apps charts. - * - * @param em a pointer to the structure with the default values. - */ -void ebpf_obsolete_dc_apps_charts(struct ebpf_module *em) -{ - struct ebpf_target *w; - int update_every = em->update_every; - for (w = apps_groups_root_target; w; w = w->next) { - if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_DCSTAT_IDX)))) - continue; - - ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_dc_hit", - "Percentage of files inside directory cache.", - EBPF_COMMON_DIMENSION_PERCENTAGE, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - "app.ebpf_dc_hit", - 20265, - update_every); - - ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_dc_reference", - "Count file access.", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_dc_reference", - 20266, - update_every); - - ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_not_cache", - "Files not present inside directory cache.", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_dc_not_cache", - 20267, - update_every); - - ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_not_found", - "Files not found.", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_dc_not_found", - 20268, - update_every); - - w->charts_created &= ~(1<<EBPF_MODULE_DCSTAT_IDX); - } -} - -/** - * Obsolete global - * - * Obsolete global charts created by thread. - * - * @param em a pointer to `struct ebpf_module` - */ -static void ebpf_obsolete_dc_global(ebpf_module_t *em) -{ - ebpf_write_chart_obsolete(NETDATA_FILESYSTEM_FAMILY, - NETDATA_DC_HIT_CHART, - "", - "Percentage of files inside directory cache", - EBPF_COMMON_DIMENSION_PERCENTAGE, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NULL, - 21200, - em->update_every); - - ebpf_write_chart_obsolete(NETDATA_FILESYSTEM_FAMILY, - NETDATA_DC_REFERENCE_CHART, - "", - "Variables used to calculate hit ratio.", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NULL, - 21201, - em->update_every); -} - -/** - * DCstat exit - * - * Cancel child and exit. - * - * @param ptr thread data. - */ -static void ebpf_dcstat_exit(void *ptr) -{ - ebpf_module_t *em = (ebpf_module_t *)ptr; - - if (em->enabled == NETDATA_THREAD_EBPF_FUNCTION_RUNNING) { - pthread_mutex_lock(&lock); - if (em->cgroup_charts) { - ebpf_obsolete_dc_cgroup_charts(em); - fflush(stdout); - } - - if (em->apps_charts & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) { - ebpf_obsolete_dc_apps_charts(em); - } - - ebpf_obsolete_dc_global(em); - -#ifdef NETDATA_DEV_MODE - if (ebpf_aral_dcstat_pid) - ebpf_statistic_obsolete_aral_chart(em, dcstat_disable_priority); -#endif - - fflush(stdout); - pthread_mutex_unlock(&lock); - } - - ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_REMOVE); - -#ifdef LIBBPF_MAJOR_VERSION - if (dc_bpf_obj) { - dc_bpf__destroy(dc_bpf_obj); - dc_bpf_obj = NULL; - } -#endif - - if (em->objects){ - ebpf_unload_legacy_code(em->objects, em->probe_links); - em->objects = NULL; - em->probe_links = NULL; - } - - pthread_mutex_lock(&ebpf_exit_cleanup); - em->enabled = NETDATA_THREAD_EBPF_STOPPED; - ebpf_update_stats(&plugin_statistics, em); - pthread_mutex_unlock(&ebpf_exit_cleanup); -} - -/***************************************************************** - * - * APPS - * - *****************************************************************/ - -/** - * Create apps charts - * - * Call ebpf_create_chart to create the charts on apps submenu. - * - * @param em a pointer to the structure with the default values. - */ -void ebpf_dcstat_create_apps_charts(struct ebpf_module *em, void *ptr) -{ - struct ebpf_target *root = ptr; - struct ebpf_target *w; - int update_every = em->update_every; - for (w = root; w; w = w->next) { - if (unlikely(!w->exposed)) - continue; - - ebpf_write_chart_cmd(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_dc_hit", - "Percentage of files inside directory cache.", - EBPF_COMMON_DIMENSION_PERCENTAGE, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - "app.ebpf_dc_hit", - 20265, - update_every, - NETDATA_EBPF_MODULE_NAME_DCSTAT); - ebpf_create_chart_labels("app_group", w->name, 1); - ebpf_commit_label(); - fprintf(stdout, "DIMENSION ratio '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); - - ebpf_write_chart_cmd(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_dc_reference", - "Count file access.", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_dc_reference", - 20266, - update_every, - NETDATA_EBPF_MODULE_NAME_DCSTAT); - ebpf_create_chart_labels("app_group", w->name, 1); - ebpf_commit_label(); - fprintf(stdout, "DIMENSION files '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); - - ebpf_write_chart_cmd(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_not_cache", - "Files not present inside directory cache.", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_dc_not_cache", - 20267, - update_every, - NETDATA_EBPF_MODULE_NAME_DCSTAT); - ebpf_create_chart_labels("app_group", w->name, 1); - ebpf_commit_label(); - fprintf(stdout, "DIMENSION files '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); - - ebpf_write_chart_cmd(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_not_found", - "Files not found.", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_dc_not_found", - 20268, - update_every, - NETDATA_EBPF_MODULE_NAME_DCSTAT); - ebpf_create_chart_labels("app_group", w->name, 1); - ebpf_commit_label(); - fprintf(stdout, "DIMENSION files '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]); - - w->charts_created |= 1<<EBPF_MODULE_DCSTAT_IDX; - } - - em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED; -} - -/***************************************************************** - * - * MAIN LOOP - * - *****************************************************************/ - -/** - * Apps Accumulator - * - * Sum all values read from kernel and store in the first address. - * - * @param out the vector with read values. - * @param maps_per_core do I need to read all cores? - */ -static void dcstat_apps_accumulator(netdata_dcstat_pid_t *out, int maps_per_core) -{ - int i, end = (maps_per_core) ? ebpf_nprocs : 1; - netdata_dcstat_pid_t *total = &out[0]; - for (i = 1; i < end; i++) { - netdata_dcstat_pid_t *w = &out[i]; - total->cache_access += w->cache_access; - total->file_system += w->file_system; - total->not_found += w->not_found; - } -} - -/** - * Save PID values - * - * Save the current values inside the structure - * - * @param out vector used to plot charts - * @param publish vector with values read from hash tables. - */ -static inline void dcstat_save_pid_values(netdata_publish_dcstat_t *out, netdata_dcstat_pid_t *publish) -{ - memcpy(&out->curr, &publish[0], sizeof(netdata_dcstat_pid_t)); -} - -/** - * Fill PID - * - * Fill PID structures - * - * @param current_pid pid that we are collecting data - * @param out values read from hash tables; - */ -static void dcstat_fill_pid(uint32_t current_pid, netdata_dcstat_pid_t *publish) -{ - netdata_publish_dcstat_t *curr = dcstat_pid[current_pid]; - if (!curr) { - curr = ebpf_publish_dcstat_get(); - dcstat_pid[current_pid] = curr; - } - - dcstat_save_pid_values(curr, publish); -} - -/** - * Read Directory Cache APPS table - * - * Read the apps table and store data inside the structure. - * - * @param maps_per_core do I need to read all cores? - */ -static void read_dc_apps_table(int maps_per_core) -{ - netdata_dcstat_pid_t *cv = dcstat_vector; - uint32_t key; - struct ebpf_pid_stat *pids = ebpf_root_of_pids; - int fd = dcstat_maps[NETDATA_DCSTAT_PID_STATS].map_fd; - size_t length = sizeof(netdata_dcstat_pid_t); - if (maps_per_core) - length *= ebpf_nprocs; - - while (pids) { - key = pids->pid; - - if (bpf_map_lookup_elem(fd, &key, cv)) { - pids = pids->next; - continue; - } - - dcstat_apps_accumulator(cv, maps_per_core); - - dcstat_fill_pid(key, cv); - - // We are cleaning to avoid passing data read from one process to other. - memset(cv, 0, length); - - pids = pids->next; - } -} - -/** - * Update cgroup - * - * Update cgroup data based in collected PID. - * - * @param maps_per_core do I need to read all cores? - */ -static void ebpf_update_dc_cgroup(int maps_per_core) -{ - netdata_dcstat_pid_t *cv = dcstat_vector; - int fd = dcstat_maps[NETDATA_DCSTAT_PID_STATS].map_fd; - size_t length = sizeof(netdata_dcstat_pid_t)*ebpf_nprocs; - - ebpf_cgroup_target_t *ect; - pthread_mutex_lock(&mutex_cgroup_shm); - for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { - struct pid_on_target2 *pids; - for (pids = ect->pids; pids; pids = pids->next) { - int pid = pids->pid; - netdata_dcstat_pid_t *out = &pids->dc; - if (likely(dcstat_pid) && dcstat_pid[pid]) { - netdata_publish_dcstat_t *in = dcstat_pid[pid]; - - memcpy(out, &in->curr, sizeof(netdata_dcstat_pid_t)); - } else { - memset(cv, 0, length); - if (bpf_map_lookup_elem(fd, &pid, cv)) { - continue; - } - - dcstat_apps_accumulator(cv, maps_per_core); - - memcpy(out, cv, sizeof(netdata_dcstat_pid_t)); - } - } - } - pthread_mutex_unlock(&mutex_cgroup_shm); -} - -/** - * Read global table - * - * Read the table with number of calls for all functions - * - * @param stats vector used to read data from control table. - * @param maps_per_core do I need to read all cores? - */ -static void ebpf_dc_read_global_tables(netdata_idx_t *stats, int maps_per_core) -{ - ebpf_read_global_table_stats(dcstat_hash_values, - dcstat_values, - dcstat_maps[NETDATA_DCSTAT_GLOBAL_STATS].map_fd, - maps_per_core, - NETDATA_KEY_DC_REFERENCE, - NETDATA_DIRECTORY_CACHE_END); - - ebpf_read_global_table_stats(stats, - dcstat_values, - dcstat_maps[NETDATA_DCSTAT_CTRL].map_fd, - maps_per_core, - NETDATA_CONTROLLER_PID_TABLE_ADD, - NETDATA_CONTROLLER_END); -} - -/** - * Cachestat sum PIDs - * - * Sum values for all PIDs associated to a group - * - * @param publish output structure. - * @param root structure with listed IPs - */ -void ebpf_dcstat_sum_pids(netdata_publish_dcstat_t *publish, struct ebpf_pid_on_target *root) -{ - memset(&publish->curr, 0, sizeof(netdata_dcstat_pid_t)); - netdata_dcstat_pid_t *dst = &publish->curr; - while (root) { - int32_t pid = root->pid; - netdata_publish_dcstat_t *w = dcstat_pid[pid]; - if (w) { - netdata_dcstat_pid_t *src = &w->curr; - dst->cache_access += src->cache_access; - dst->file_system += src->file_system; - dst->not_found += src->not_found; - } - - root = root->next; - } -} - -/** - * Send data to Netdata calling auxiliary functions. - * - * @param root the target list. -*/ -void ebpf_dcache_send_apps_data(struct ebpf_target *root) -{ - struct ebpf_target *w; - collected_number value; - - for (w = root; w; w = w->next) { - if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_DCSTAT_IDX)))) - continue; - - ebpf_dcstat_sum_pids(&w->dcstat, w->root_pid); - - uint64_t cache = w->dcstat.curr.cache_access; - uint64_t not_found = w->dcstat.curr.not_found; - - dcstat_update_publish(&w->dcstat, cache, not_found); - - value = (collected_number) w->dcstat.ratio; - ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_dc_hit"); - write_chart_dimension("ratio", value); - ebpf_write_end_chart(); - - if (w->dcstat.curr.cache_access < w->dcstat.prev.cache_access) { - w->dcstat.prev.cache_access = 0; - } - w->dcstat.cache_access = (long long)w->dcstat.curr.cache_access - (long long)w->dcstat.prev.cache_access; - - ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_dc_reference"); - value = (collected_number) w->dcstat.cache_access; - write_chart_dimension("files", value); - ebpf_write_end_chart(); - w->dcstat.prev.cache_access = w->dcstat.curr.cache_access; - - if (w->dcstat.curr.file_system < w->dcstat.prev.file_system) { - w->dcstat.prev.file_system = 0; - } - value = (collected_number) (!w->dcstat.cache_access) ? 0 : - (long long )w->dcstat.curr.file_system - (long long)w->dcstat.prev.file_system; - ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_not_cache"); - write_chart_dimension("files", value); - ebpf_write_end_chart(); - w->dcstat.prev.file_system = w->dcstat.curr.file_system; - - if (w->dcstat.curr.not_found < w->dcstat.prev.not_found) { - w->dcstat.prev.not_found = 0; - } - value = (collected_number) (!w->dcstat.cache_access) ? 0 : - (long long)w->dcstat.curr.not_found - (long long)w->dcstat.prev.not_found; - ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_not_found"); - write_chart_dimension("files", value); - ebpf_write_end_chart(); - w->dcstat.prev.not_found = w->dcstat.curr.not_found; - } -} - -/** - * Send global - * - * Send global charts to Netdata - */ -static void dcstat_send_global(netdata_publish_dcstat_t *publish) -{ - dcstat_update_publish(publish, dcstat_hash_values[NETDATA_KEY_DC_REFERENCE], - dcstat_hash_values[NETDATA_KEY_DC_MISS]); - - netdata_publish_syscall_t *ptr = dcstat_counter_publish_aggregated; - netdata_idx_t value = dcstat_hash_values[NETDATA_KEY_DC_REFERENCE]; - if (value != ptr[NETDATA_DCSTAT_IDX_REFERENCE].pcall) { - ptr[NETDATA_DCSTAT_IDX_REFERENCE].ncall = value - ptr[NETDATA_DCSTAT_IDX_REFERENCE].pcall; - ptr[NETDATA_DCSTAT_IDX_REFERENCE].pcall = value; - - value = dcstat_hash_values[NETDATA_KEY_DC_SLOW]; - ptr[NETDATA_DCSTAT_IDX_SLOW].ncall = value - ptr[NETDATA_DCSTAT_IDX_SLOW].pcall; - ptr[NETDATA_DCSTAT_IDX_SLOW].pcall = value; - - value = dcstat_hash_values[NETDATA_KEY_DC_MISS]; - ptr[NETDATA_DCSTAT_IDX_MISS].ncall = value - ptr[NETDATA_DCSTAT_IDX_MISS].pcall; - ptr[NETDATA_DCSTAT_IDX_MISS].pcall = value; - } else { - ptr[NETDATA_DCSTAT_IDX_REFERENCE].ncall = 0; - ptr[NETDATA_DCSTAT_IDX_SLOW].ncall = 0; - ptr[NETDATA_DCSTAT_IDX_MISS].ncall = 0; - } - - ebpf_one_dimension_write_charts(NETDATA_FILESYSTEM_FAMILY, NETDATA_DC_HIT_CHART, - ptr[NETDATA_DCSTAT_IDX_RATIO].dimension, publish->ratio); - - write_count_chart( - NETDATA_DC_REFERENCE_CHART, NETDATA_FILESYSTEM_FAMILY, - &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE], 3); -} - -/** - * Create specific directory cache charts - * - * Create charts for cgroup/application. - * - * @param type the chart type. - * @param update_every value to overwrite the update frequency set by the server. - */ -static void ebpf_create_specific_dc_charts(char *type, int update_every) -{ - ebpf_create_chart(type, NETDATA_DC_HIT_CHART, "Percentage of files inside directory cache", - EBPF_COMMON_DIMENSION_PERCENTAGE, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_CGROUP_DC_HIT_RATIO_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5700, - ebpf_create_global_dimension, - dcstat_counter_publish_aggregated, 1, update_every, NETDATA_EBPF_MODULE_NAME_DCSTAT); - - ebpf_create_chart(type, NETDATA_DC_REFERENCE_CHART, "Count file access", - EBPF_COMMON_DIMENSION_FILES, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_CGROUP_DC_REFERENCE_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5701, - ebpf_create_global_dimension, - &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE], 1, - update_every, NETDATA_EBPF_MODULE_NAME_DCSTAT); - - ebpf_create_chart(type, NETDATA_DC_REQUEST_NOT_CACHE_CHART, - "Files not present inside directory cache", - EBPF_COMMON_DIMENSION_FILES, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_CGROUP_DC_NOT_CACHE_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5702, - ebpf_create_global_dimension, - &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_SLOW], 1, - update_every, NETDATA_EBPF_MODULE_NAME_DCSTAT); - - ebpf_create_chart(type, NETDATA_DC_REQUEST_NOT_FOUND_CHART, - "Files not found", - EBPF_COMMON_DIMENSION_FILES, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_CGROUP_DC_NOT_FOUND_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5703, - ebpf_create_global_dimension, - &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_MISS], 1, - update_every, NETDATA_EBPF_MODULE_NAME_DCSTAT); -} - -/** - * Obsolete specific directory cache charts - * - * Obsolete charts for cgroup/application. - * - * @param type the chart type. - * @param update_every value to overwrite the update frequency set by the server. - */ -static void ebpf_obsolete_specific_dc_charts(char *type, int update_every) -{ - ebpf_write_chart_obsolete(type, NETDATA_DC_HIT_CHART, - "", - "Percentage of files inside directory cache", - EBPF_COMMON_DIMENSION_PERCENTAGE, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_DC_HIT_RATIO_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5700, update_every); - - ebpf_write_chart_obsolete(type, NETDATA_DC_REFERENCE_CHART, - "", - "Count file access", - EBPF_COMMON_DIMENSION_FILES, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_DC_REFERENCE_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5701, update_every); - - ebpf_write_chart_obsolete(type, NETDATA_DC_REQUEST_NOT_CACHE_CHART, - "", - "Files not present inside directory cache", - EBPF_COMMON_DIMENSION_FILES, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_DC_NOT_CACHE_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5702, update_every); - - ebpf_write_chart_obsolete(type, NETDATA_DC_REQUEST_NOT_FOUND_CHART, - "", - "Files not found", - EBPF_COMMON_DIMENSION_FILES, NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_DC_NOT_FOUND_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5703, update_every); -} - -/** - * Cachestat sum PIDs - * - * Sum values for all PIDs associated to a group - * - * @param publish output structure. - * @param root structure with listed IPs - */ -void ebpf_dc_sum_cgroup_pids(netdata_publish_dcstat_t *publish, struct pid_on_target2 *root) -{ - memset(&publish->curr, 0, sizeof(netdata_dcstat_pid_t)); - netdata_dcstat_pid_t *dst = &publish->curr; - while (root) { - netdata_dcstat_pid_t *src = &root->dc; - - dst->cache_access += src->cache_access; - dst->file_system += src->file_system; - dst->not_found += src->not_found; - - root = root->next; - } -} - -/** - * Calc chart values - * - * Do necessary math to plot charts. - */ -void ebpf_dc_calc_chart_values() -{ - ebpf_cgroup_target_t *ect; - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - ebpf_dc_sum_cgroup_pids(&ect->publish_dc, ect->pids); - uint64_t cache = ect->publish_dc.curr.cache_access; - uint64_t not_found = ect->publish_dc.curr.not_found; - - dcstat_update_publish(&ect->publish_dc, cache, not_found); - - ect->publish_dc.cache_access = (long long)ect->publish_dc.curr.cache_access - - (long long)ect->publish_dc.prev.cache_access; - ect->publish_dc.prev.cache_access = ect->publish_dc.curr.cache_access; - - if (ect->publish_dc.curr.not_found < ect->publish_dc.prev.not_found) { - ect->publish_dc.prev.not_found = 0; - } - } -} - -/** - * Create Systemd directory cache Charts - * - * Create charts when systemd is enabled - * - * @param update_every value to overwrite the update frequency set by the server. - **/ -static void ebpf_create_systemd_dc_charts(int update_every) -{ - ebpf_create_charts_on_systemd(NETDATA_DC_HIT_CHART, - "Percentage of files inside directory cache", - EBPF_COMMON_DIMENSION_PERCENTAGE, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - 21200, - ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX], - NETDATA_SYSTEMD_DC_HIT_RATIO_CONTEXT, NETDATA_EBPF_MODULE_NAME_DCSTAT, - update_every); - - ebpf_create_charts_on_systemd(NETDATA_DC_REFERENCE_CHART, - "Count file access", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - 21201, - ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX], - NETDATA_SYSTEMD_DC_REFERENCE_CONTEXT, NETDATA_EBPF_MODULE_NAME_DCSTAT, - update_every); - - ebpf_create_charts_on_systemd(NETDATA_DC_REQUEST_NOT_CACHE_CHART, - "Files not present inside directory cache", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - 21202, - ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX], - NETDATA_SYSTEMD_DC_NOT_CACHE_CONTEXT, NETDATA_EBPF_MODULE_NAME_DCSTAT, - update_every); - - ebpf_create_charts_on_systemd(NETDATA_DC_REQUEST_NOT_FOUND_CHART, - "Files not found", - EBPF_COMMON_DIMENSION_FILES, - NETDATA_DIRECTORY_CACHE_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - 21202, - ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX], - NETDATA_SYSTEMD_DC_NOT_FOUND_CONTEXT, NETDATA_EBPF_MODULE_NAME_DCSTAT, - update_every); -} - -/** - * Send Directory Cache charts - * - * Send collected data to Netdata. - */ -static void ebpf_send_systemd_dc_charts() -{ - collected_number value; - ebpf_cgroup_target_t *ect; - ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_DC_HIT_CHART, ""); - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (unlikely(ect->systemd) && unlikely(ect->updated)) { - write_chart_dimension(ect->name, (long long) ect->publish_dc.ratio); - } - } - ebpf_write_end_chart(); - - ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_DC_REFERENCE_CHART, ""); - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (unlikely(ect->systemd) && unlikely(ect->updated)) { - write_chart_dimension(ect->name, (long long) ect->publish_dc.cache_access); - } - } - ebpf_write_end_chart(); - - ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_DC_REQUEST_NOT_CACHE_CHART, ""); - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (unlikely(ect->systemd) && unlikely(ect->updated)) { - value = (collected_number) (!ect->publish_dc.cache_access) ? 0 : - (long long )ect->publish_dc.curr.file_system - (long long)ect->publish_dc.prev.file_system; - ect->publish_dc.prev.file_system = ect->publish_dc.curr.file_system; - - write_chart_dimension(ect->name, (long long) value); - } - } - ebpf_write_end_chart(); - - ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_DC_REQUEST_NOT_FOUND_CHART, ""); - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (unlikely(ect->systemd) && unlikely(ect->updated)) { - value = (collected_number) (!ect->publish_dc.cache_access) ? 0 : - (long long)ect->publish_dc.curr.not_found - (long long)ect->publish_dc.prev.not_found; - - ect->publish_dc.prev.not_found = ect->publish_dc.curr.not_found; - - write_chart_dimension(ect->name, (long long) value); - } - } - ebpf_write_end_chart(); -} - -/** - * Send Directory Cache charts - * - * Send collected data to Netdata. - * - */ -static void ebpf_send_specific_dc_data(char *type, netdata_publish_dcstat_t *pdc) -{ - collected_number value; - ebpf_write_begin_chart(type, NETDATA_DC_HIT_CHART, ""); - write_chart_dimension(dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_RATIO].name, - (long long) pdc->ratio); - ebpf_write_end_chart(); - - ebpf_write_begin_chart(type, NETDATA_DC_REFERENCE_CHART, ""); - write_chart_dimension(dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE].name, - (long long) pdc->cache_access); - ebpf_write_end_chart(); - - value = (collected_number) (!pdc->cache_access) ? 0 : - (long long )pdc->curr.file_system - (long long)pdc->prev.file_system; - pdc->prev.file_system = pdc->curr.file_system; - - ebpf_write_begin_chart(type, NETDATA_DC_REQUEST_NOT_CACHE_CHART, ""); - write_chart_dimension(dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_SLOW].name, (long long) value); - ebpf_write_end_chart(); - - value = (collected_number) (!pdc->cache_access) ? 0 : - (long long)pdc->curr.not_found - (long long)pdc->prev.not_found; - pdc->prev.not_found = pdc->curr.not_found; - - ebpf_write_begin_chart(type, NETDATA_DC_REQUEST_NOT_FOUND_CHART, ""); - write_chart_dimension(dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_MISS].name, (long long) value); - ebpf_write_end_chart(); -} - -/** - * Send data to Netdata calling auxiliary functions. - * - * @param update_every value to overwrite the update frequency set by the server. -*/ -void ebpf_dc_send_cgroup_data(int update_every) -{ - if (!ebpf_cgroup_pids) - return; - - pthread_mutex_lock(&mutex_cgroup_shm); - ebpf_cgroup_target_t *ect; - ebpf_dc_calc_chart_values(); - - int has_systemd = shm_ebpf_cgroup.header->systemd_enabled; - if (has_systemd) { - if (send_cgroup_chart) { - ebpf_create_systemd_dc_charts(update_every); - } - - ebpf_send_systemd_dc_charts(); - } - - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (ect->systemd) - continue; - - if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_DC_CHART) && ect->updated) { - ebpf_create_specific_dc_charts(ect->name, update_every); - ect->flags |= NETDATA_EBPF_CGROUP_HAS_DC_CHART; - } - - if (ect->flags & NETDATA_EBPF_CGROUP_HAS_DC_CHART) { - if (ect->updated) { - ebpf_send_specific_dc_data(ect->name, &ect->publish_dc); - } else { - ebpf_obsolete_specific_dc_charts(ect->name, update_every); - ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_DC_CHART; - } - } - } - - pthread_mutex_unlock(&mutex_cgroup_shm); -} - -/** -* Main loop for this collector. -*/ -static void dcstat_collector(ebpf_module_t *em) -{ - netdata_publish_dcstat_t publish; - memset(&publish, 0, sizeof(publish)); - int cgroups = em->cgroup_charts; - int update_every = em->update_every; - heartbeat_t hb; - heartbeat_init(&hb); - int counter = update_every - 1; - int maps_per_core = em->maps_per_core; - uint32_t running_time = 0; - uint32_t lifetime = em->lifetime; - netdata_idx_t *stats = em->hash_table_stats; - memset(stats, 0, sizeof(em->hash_table_stats)); - while (!ebpf_plugin_exit && running_time < lifetime) { - (void)heartbeat_next(&hb, USEC_PER_SEC); - - if (ebpf_plugin_exit || ++counter != update_every) - continue; - - counter = 0; - netdata_apps_integration_flags_t apps = em->apps_charts; - ebpf_dc_read_global_tables(stats, maps_per_core); - pthread_mutex_lock(&collect_data_mutex); - if (apps) - read_dc_apps_table(maps_per_core); - - if (cgroups) - ebpf_update_dc_cgroup(maps_per_core); - - pthread_mutex_lock(&lock); - - dcstat_send_global(&publish); - - if (apps & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) - ebpf_dcache_send_apps_data(apps_groups_root_target); - -#ifdef NETDATA_DEV_MODE - if (ebpf_aral_dcstat_pid) - ebpf_send_data_aral_chart(ebpf_aral_dcstat_pid, em); -#endif - - if (cgroups) - ebpf_dc_send_cgroup_data(update_every); - - pthread_mutex_unlock(&lock); - pthread_mutex_unlock(&collect_data_mutex); - - pthread_mutex_lock(&ebpf_exit_cleanup); - if (running_time && !em->running_time) - running_time = update_every; - else - running_time += update_every; - - em->running_time = running_time; - pthread_mutex_unlock(&ebpf_exit_cleanup); - } -} - -/***************************************************************** - * - * INITIALIZE THREAD - * - *****************************************************************/ - -/** - * Create filesystem charts - * - * Call ebpf_create_chart to create the charts for the collector. - * - * @param update_every value to overwrite the update frequency set by the server. - */ -static void ebpf_create_dc_global_charts(int update_every) -{ - ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY, NETDATA_DC_HIT_CHART, - "Percentage of files inside directory cache", - EBPF_COMMON_DIMENSION_PERCENTAGE, NETDATA_DIRECTORY_CACHE_SUBMENU, - NULL, - NETDATA_EBPF_CHART_TYPE_LINE, - 21200, - ebpf_create_global_dimension, - dcstat_counter_publish_aggregated, 1, update_every, NETDATA_EBPF_MODULE_NAME_DCSTAT); - - ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY, NETDATA_DC_REFERENCE_CHART, - "Variables used to calculate hit ratio.", - EBPF_COMMON_DIMENSION_FILES, NETDATA_DIRECTORY_CACHE_SUBMENU, - NULL, - NETDATA_EBPF_CHART_TYPE_LINE, - 21201, - ebpf_create_global_dimension, - &dcstat_counter_publish_aggregated[NETDATA_DCSTAT_IDX_REFERENCE], 3, - update_every, NETDATA_EBPF_MODULE_NAME_DCSTAT); - - fflush(stdout); -} - -/** - * Allocate vectors used with this thread. - * - * We are not testing the return, because callocz does this and shutdown the software - * case it was not possible to allocate. - * - * @param apps is apps enabled? - */ -static void ebpf_dcstat_allocate_global_vectors(int apps) -{ - if (apps) { - ebpf_dcstat_aral_init(); - dcstat_pid = callocz((size_t)pid_max, sizeof(netdata_publish_dcstat_t *)); - dcstat_vector = callocz((size_t)ebpf_nprocs, sizeof(netdata_dcstat_pid_t)); - } - - dcstat_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_idx_t)); - - memset(dcstat_counter_aggregated_data, 0, NETDATA_DCSTAT_IDX_END * sizeof(netdata_syscall_stat_t)); - memset(dcstat_counter_publish_aggregated, 0, NETDATA_DCSTAT_IDX_END * sizeof(netdata_publish_syscall_t)); -} - -/***************************************************************** - * - * MAIN THREAD - * - *****************************************************************/ - -/* - * Load BPF - * - * Load BPF files. - * - * @param em the structure with configuration - */ -static int ebpf_dcstat_load_bpf(ebpf_module_t *em) -{ -#ifdef LIBBPF_MAJOR_VERSION - ebpf_define_map_type(dcstat_maps, em->maps_per_core, running_on_kernel); -#endif - - int ret = 0; - ebpf_adjust_apps_cgroup(em, em->targets[NETDATA_DC_TARGET_LOOKUP_FAST].mode); - if (em->load & EBPF_LOAD_LEGACY) { - em->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &em->objects); - if (!em->probe_links) { - ret = -1; - } - } -#ifdef LIBBPF_MAJOR_VERSION - else { - dc_bpf_obj = dc_bpf__open(); - if (!dc_bpf_obj) - ret = -1; - else - ret = ebpf_dc_load_and_attach(dc_bpf_obj, em); - } -#endif - - if (ret) - netdata_log_error("%s %s", EBPF_DEFAULT_ERROR_MSG, em->info.thread_name); - - return ret; -} - -/** - * Directory Cache thread - * - * Thread used to make dcstat thread - * - * @param ptr a pointer to `struct ebpf_module` - * - * @return It always returns NULL - */ -void *ebpf_dcstat_thread(void *ptr) -{ - netdata_thread_cleanup_push(ebpf_dcstat_exit, ptr); - - ebpf_module_t *em = (ebpf_module_t *)ptr; - em->maps = dcstat_maps; - - ebpf_update_pid_table(&dcstat_maps[NETDATA_DCSTAT_PID_STATS], em); - - ebpf_update_names(dc_optional_name, em); - -#ifdef LIBBPF_MAJOR_VERSION - ebpf_adjust_thread_load(em, default_btf); -#endif - if (ebpf_dcstat_load_bpf(em)) { - goto enddcstat; - } - - ebpf_dcstat_allocate_global_vectors(em->apps_charts); - - int algorithms[NETDATA_DCSTAT_IDX_END] = { - NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, - NETDATA_EBPF_ABSOLUTE_IDX - }; - - ebpf_global_labels(dcstat_counter_aggregated_data, dcstat_counter_publish_aggregated, - dcstat_counter_dimension_name, dcstat_counter_dimension_name, - algorithms, NETDATA_DCSTAT_IDX_END); - - pthread_mutex_lock(&lock); - ebpf_create_dc_global_charts(em->update_every); - ebpf_update_stats(&plugin_statistics, em); - ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_ADD); -#ifdef NETDATA_DEV_MODE - if (ebpf_aral_dcstat_pid) - dcstat_disable_priority = ebpf_statistic_create_aral_chart(NETDATA_EBPF_DCSTAT_ARAL_NAME, em); -#endif - - pthread_mutex_unlock(&lock); - - dcstat_collector(em); - -enddcstat: - ebpf_update_disabled_plugin_stats(em); - - netdata_thread_cleanup_pop(1); - return NULL; -} |