diff options
Diffstat (limited to 'src/collectors/ebpf.plugin/ebpf_fd.c')
| -rw-r--r-- | src/collectors/ebpf.plugin/ebpf_fd.c | 1474 |
1 files changed, 1474 insertions, 0 deletions
diff --git a/src/collectors/ebpf.plugin/ebpf_fd.c b/src/collectors/ebpf.plugin/ebpf_fd.c new file mode 100644 index 000000000..4025931f7 --- /dev/null +++ b/src/collectors/ebpf.plugin/ebpf_fd.c @@ -0,0 +1,1474 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "ebpf.h" +#include "ebpf_fd.h" + +static char *fd_dimension_names[NETDATA_FD_SYSCALL_END] = { "open", "close" }; +static char *fd_id_names[NETDATA_FD_SYSCALL_END] = { "do_sys_open", "__close_fd" }; + +#ifdef LIBBPF_MAJOR_VERSION +static char *close_targets[NETDATA_EBPF_MAX_FD_TARGETS] = {"close_fd", "__close_fd"}; +static char *open_targets[NETDATA_EBPF_MAX_FD_TARGETS] = {"do_sys_openat2", "do_sys_open"}; +#endif + +static netdata_syscall_stat_t fd_aggregated_data[NETDATA_FD_SYSCALL_END]; +static netdata_publish_syscall_t fd_publish_aggregated[NETDATA_FD_SYSCALL_END]; + +static ebpf_local_maps_t fd_maps[] = {{.name = "tbl_fd_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 = "tbl_fd_global", .internal_input = NETDATA_KEY_END_VECTOR, + .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 = "fd_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 + }}; + + +struct config fd_config = { .first_section = NULL, .last_section = NULL, .mutex = NETDATA_MUTEX_INITIALIZER, + .index = {.avl_tree = { .root = NULL, .compar = appconfig_section_compare }, + .rwlock = AVL_LOCK_INITIALIZER } }; + +static netdata_idx_t fd_hash_values[NETDATA_FD_COUNTER]; +static netdata_idx_t *fd_values = NULL; + +netdata_fd_stat_t *fd_vector = NULL; + +netdata_ebpf_targets_t fd_targets[] = { {.name = "open", .mode = EBPF_LOAD_TRAMPOLINE}, + {.name = "close", .mode = EBPF_LOAD_TRAMPOLINE}, + {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}}; + +struct netdata_static_thread ebpf_read_fd = { + .name = "EBPF_READ_FD", + .config_section = NULL, + .config_name = NULL, + .env_name = NULL, + .enabled = 1, + .thread = NULL, + .init_routine = NULL, + .start_routine = NULL +}; + +#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_fd_disable_probes(struct fd_bpf *obj) +{ + bpf_program__set_autoload(obj->progs.netdata_sys_open_kprobe, false); + bpf_program__set_autoload(obj->progs.netdata_sys_open_kretprobe, false); + if (!strcmp(fd_targets[NETDATA_FD_SYSCALL_CLOSE].name, close_targets[NETDATA_FD_CLOSE_FD])) { + bpf_program__set_autoload(obj->progs.netdata___close_fd_kretprobe, false); + bpf_program__set_autoload(obj->progs.netdata___close_fd_kprobe, false); + bpf_program__set_autoload(obj->progs.netdata_close_fd_kprobe, false); + } else { + bpf_program__set_autoload(obj->progs.netdata___close_fd_kprobe, false); + bpf_program__set_autoload(obj->progs.netdata_close_fd_kretprobe, false); + bpf_program__set_autoload(obj->progs.netdata_close_fd_kprobe, false); + } +} + +/* + * Disable specific probe + * + * Disable probes according the kernel version + * + * @param obj is the main structure for bpf objects + */ +static inline void ebpf_disable_specific_probes(struct fd_bpf *obj) +{ + if (!strcmp(fd_targets[NETDATA_FD_SYSCALL_CLOSE].name, close_targets[NETDATA_FD_CLOSE_FD])) { + bpf_program__set_autoload(obj->progs.netdata___close_fd_kretprobe, false); + bpf_program__set_autoload(obj->progs.netdata___close_fd_kprobe, false); + } else { + bpf_program__set_autoload(obj->progs.netdata_close_fd_kretprobe, false); + bpf_program__set_autoload(obj->progs.netdata_close_fd_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_disable_trampoline(struct fd_bpf *obj) +{ + bpf_program__set_autoload(obj->progs.netdata_sys_open_fentry, false); + bpf_program__set_autoload(obj->progs.netdata_sys_open_fexit, false); + bpf_program__set_autoload(obj->progs.netdata_close_fd_fentry, false); + bpf_program__set_autoload(obj->progs.netdata_close_fd_fexit, false); + bpf_program__set_autoload(obj->progs.netdata___close_fd_fentry, false); + bpf_program__set_autoload(obj->progs.netdata___close_fd_fexit, false); +} + +/* + * Disable specific trampoline + * + * Disable trampoline according to kernel version. + * + * @param obj is the main structure for bpf objects. + */ +static inline void ebpf_disable_specific_trampoline(struct fd_bpf *obj) +{ + if (!strcmp(fd_targets[NETDATA_FD_SYSCALL_CLOSE].name, close_targets[NETDATA_FD_CLOSE_FD])) { + bpf_program__set_autoload(obj->progs.netdata___close_fd_fentry, false); + bpf_program__set_autoload(obj->progs.netdata___close_fd_fexit, false); + } else { + bpf_program__set_autoload(obj->progs.netdata_close_fd_fentry, false); + bpf_program__set_autoload(obj->progs.netdata_close_fd_fexit, false); + } +} + +/** + * Set trampoline target + * + * Set the targets we will monitor. + * + * @param obj is the main structure for bpf objects. + */ +static void ebpf_set_trampoline_target(struct fd_bpf *obj) +{ + bpf_program__set_attach_target(obj->progs.netdata_sys_open_fentry, 0, fd_targets[NETDATA_FD_SYSCALL_OPEN].name); + bpf_program__set_attach_target(obj->progs.netdata_sys_open_fexit, 0, fd_targets[NETDATA_FD_SYSCALL_OPEN].name); + + if (!strcmp(fd_targets[NETDATA_FD_SYSCALL_CLOSE].name, close_targets[NETDATA_FD_CLOSE_FD])) { + bpf_program__set_attach_target( + obj->progs.netdata_close_fd_fentry, 0, fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + bpf_program__set_attach_target(obj->progs.netdata_close_fd_fexit, 0, fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + } else { + bpf_program__set_attach_target( + obj->progs.netdata___close_fd_fentry, 0, fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + bpf_program__set_attach_target( + obj->progs.netdata___close_fd_fexit, 0, fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + } +} + +/** + * 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_fd_attach_probe(struct fd_bpf *obj) +{ + obj->links.netdata_sys_open_kprobe = bpf_program__attach_kprobe(obj->progs.netdata_sys_open_kprobe, false, + fd_targets[NETDATA_FD_SYSCALL_OPEN].name); + long ret = libbpf_get_error(obj->links.netdata_sys_open_kprobe); + if (ret) + return -1; + + obj->links.netdata_sys_open_kretprobe = bpf_program__attach_kprobe(obj->progs.netdata_sys_open_kretprobe, true, + fd_targets[NETDATA_FD_SYSCALL_OPEN].name); + ret = libbpf_get_error(obj->links.netdata_sys_open_kretprobe); + if (ret) + return -1; + + if (!strcmp(fd_targets[NETDATA_FD_SYSCALL_CLOSE].name, close_targets[NETDATA_FD_CLOSE_FD])) { + obj->links.netdata_close_fd_kretprobe = bpf_program__attach_kprobe(obj->progs.netdata_close_fd_kretprobe, true, + fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + ret = libbpf_get_error(obj->links.netdata_close_fd_kretprobe); + if (ret) + return -1; + + obj->links.netdata_close_fd_kprobe = bpf_program__attach_kprobe(obj->progs.netdata_close_fd_kprobe, false, + fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + ret = libbpf_get_error(obj->links.netdata_close_fd_kprobe); + if (ret) + return -1; + } else { + obj->links.netdata___close_fd_kretprobe = bpf_program__attach_kprobe(obj->progs.netdata___close_fd_kretprobe, + true, + fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + ret = libbpf_get_error(obj->links.netdata___close_fd_kretprobe); + if (ret) + return -1; + + obj->links.netdata___close_fd_kprobe = bpf_program__attach_kprobe(obj->progs.netdata___close_fd_kprobe, + false, + fd_targets[NETDATA_FD_SYSCALL_CLOSE].name); + ret = libbpf_get_error(obj->links.netdata___close_fd_kprobe); + if (ret) + return -1; + } + + return 0; +} + +/** + * FD Fill Address + * + * Fill address value used to load probes/trampoline. + */ +static inline void ebpf_fd_fill_address(ebpf_addresses_t *address, char **targets) +{ + int i; + for (i = 0; i < NETDATA_EBPF_MAX_FD_TARGETS; i++) { + address->function = targets[i]; + ebpf_load_addresses(address, -1); + if (address->addr) + break; + } +} + +/** + * Set target values + * + * Set pointers used to load data. + * + * @return It returns 0 on success and -1 otherwise. + */ +static int ebpf_fd_set_target_values() +{ + ebpf_addresses_t address = {.function = NULL, .hash = 0, .addr = 0}; + ebpf_fd_fill_address(&address, close_targets); + + if (!address.addr) + return -1; + + fd_targets[NETDATA_FD_SYSCALL_CLOSE].name = address.function; + + address.addr = 0; + ebpf_fd_fill_address(&address, open_targets); + + if (!address.addr) + return -1; + + fd_targets[NETDATA_FD_SYSCALL_OPEN].name = address.function; + + return 0; +} + +/** + * 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_fd_set_hash_tables(struct fd_bpf *obj) +{ + fd_maps[NETDATA_FD_GLOBAL_STATS].map_fd = bpf_map__fd(obj->maps.tbl_fd_global); + fd_maps[NETDATA_FD_PID_STATS].map_fd = bpf_map__fd(obj->maps.tbl_fd_pid); + fd_maps[NETDATA_FD_CONTROLLER].map_fd = bpf_map__fd(obj->maps.fd_ctrl); +} + +/** + * 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_fd_adjust_map(struct fd_bpf *obj, ebpf_module_t *em) +{ + ebpf_update_map_size(obj->maps.tbl_fd_pid, &fd_maps[NETDATA_FD_PID_STATS], + em, bpf_map__name(obj->maps.tbl_fd_pid)); + + ebpf_update_map_type(obj->maps.tbl_fd_global, &fd_maps[NETDATA_FD_GLOBAL_STATS]); + ebpf_update_map_type(obj->maps.tbl_fd_pid, &fd_maps[NETDATA_FD_PID_STATS]); + ebpf_update_map_type(obj->maps.fd_ctrl, &fd_maps[NETDATA_FD_CONTROLLER]); +} + +/** + * 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_fd_load_and_attach(struct fd_bpf *obj, ebpf_module_t *em) +{ + netdata_ebpf_targets_t *mt = em->targets; + netdata_ebpf_program_loaded_t test = mt[NETDATA_FD_SYSCALL_OPEN].mode; + + if (ebpf_fd_set_target_values()) { + netdata_log_error("%s file descriptor.", NETDATA_EBPF_DEFAULT_FNT_NOT_FOUND); + return -1; + } + + if (test == EBPF_LOAD_TRAMPOLINE) { + ebpf_fd_disable_probes(obj); + ebpf_disable_specific_trampoline(obj); + + ebpf_set_trampoline_target(obj); + } else { + ebpf_disable_trampoline(obj); + ebpf_disable_specific_probes(obj); + } + + ebpf_fd_adjust_map(obj, em); + + int ret = fd_bpf__load(obj); + if (ret) { + return ret; + } + + ret = (test == EBPF_LOAD_TRAMPOLINE) ? fd_bpf__attach(obj) : ebpf_fd_attach_probe(obj); + if (!ret) { + ebpf_fd_set_hash_tables(obj); + + ebpf_update_controller(fd_maps[NETDATA_FD_CONTROLLER].map_fd, em); + } + + return ret; +} +#endif + +/***************************************************************** + * + * FUNCTIONS TO CLOSE THE THREAD + * + *****************************************************************/ + +static void ebpf_obsolete_specific_fd_charts(char *type, ebpf_module_t *em); + +/** + * Obsolete services + * + * Obsolete all service charts created + * + * @param em a pointer to `struct ebpf_module` + */ +static void ebpf_obsolete_fd_services(ebpf_module_t *em, char *id) +{ + ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, + id, + NETDATA_SYSCALL_APPS_FILE_OPEN, + "Number of open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + NETDATA_CGROUP_FD_OPEN_CONTEXT, + 20270, + em->update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, + id, + NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, + "Fails to open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + NETDATA_CGROUP_FD_OPEN_ERR_CONTEXT, + 20271, + em->update_every); + } + + ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, + id, + NETDATA_SYSCALL_APPS_FILE_CLOSED, + "Files closed", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + NETDATA_CGROUP_FD_CLOSE_CONTEXT, + 20272, + em->update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, + id, + NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, + "Fails to close files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + NETDATA_CGROUP_FD_CLOSE_ERR_CONTEXT, + 20273, + 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_fd_cgroup_charts(ebpf_module_t *em) { + pthread_mutex_lock(&mutex_cgroup_shm); + + ebpf_cgroup_target_t *ect; + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + if (ect->systemd) { + ebpf_obsolete_fd_services(em, ect->name); + + continue; + } + + ebpf_obsolete_specific_fd_charts(ect->name, em); + } + 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_fd_apps_charts(struct ebpf_module *em) +{ + struct ebpf_target *w; + int update_every = em->update_every; + pthread_mutex_lock(&collect_data_mutex); + for (w = apps_groups_root_target; w; w = w->next) { + if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_FD_IDX)))) + continue; + + ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, + w->clean_name, + "_ebpf_file_open", + "Number of open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_file_open", + 20220, + update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, + w->clean_name, + "_ebpf_file_open_error", + "Fails to open files.", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_file_open_error", + 20221, + update_every); + } + + ebpf_write_chart_obsolete(NETDATA_APPS_FAMILY, + w->clean_name, + "_ebpf_file_closed", + "Files closed.", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_file_closed", + 20222, + update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_obsolete(NETDATA_APPS_FAMILY, + w->clean_name, + "_ebpf_file_close_error", + "Fails to close files.", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_fd_close_error", + 20223, + update_every); + } + w->charts_created &= ~(1<<EBPF_MODULE_FD_IDX); + } + pthread_mutex_unlock(&collect_data_mutex); +} + +/** + * Obsolete global + * + * Obsolete global charts created by thread. + * + * @param em a pointer to `struct ebpf_module` + */ +static void ebpf_obsolete_fd_global(ebpf_module_t *em) +{ + ebpf_write_chart_obsolete(NETDATA_FILESYSTEM_FAMILY, + NETDATA_FILE_OPEN_CLOSE_COUNT, + "", + "Open and close calls", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_FS_FILEDESCRIPTOR_CONTEXT, + NETDATA_CHART_PRIO_EBPF_FD_CHARTS, + em->update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_obsolete(NETDATA_FILESYSTEM_FAMILY, + NETDATA_FILE_OPEN_ERR_COUNT, + "", + "Open fails", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_FS_FILEDESCRIPTOR_ERROR_CONTEXT, + NETDATA_CHART_PRIO_EBPF_FD_CHARTS + 1, + em->update_every); + } +} + +/** + * FD Exit + * + * Cancel child thread and exit. + * + * @param ptr thread data. + */ +static void ebpf_fd_exit(void *pptr) +{ + ebpf_module_t *em = CLEANUP_FUNCTION_GET_PTR(pptr); + if(!em) return; + + if (ebpf_read_fd.thread) + nd_thread_signal_cancel(ebpf_read_fd.thread); + + if (em->enabled == NETDATA_THREAD_EBPF_FUNCTION_RUNNING) { + pthread_mutex_lock(&lock); + if (em->cgroup_charts) { + ebpf_obsolete_fd_cgroup_charts(em); + fflush(stdout); + } + + if (em->apps_charts & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) { + ebpf_obsolete_fd_apps_charts(em); + } + + ebpf_obsolete_fd_global(em); + + 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 (fd_bpf_obj) { + fd_bpf__destroy(fd_bpf_obj); + fd_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); +} + +/***************************************************************** + * + * MAIN LOOP + * + *****************************************************************/ + +/** + * Send data to Netdata calling auxiliary functions. + * + * @param em the structure with thread information + */ +static void ebpf_fd_send_data(ebpf_module_t *em) +{ + fd_publish_aggregated[NETDATA_FD_SYSCALL_OPEN].ncall = fd_hash_values[NETDATA_KEY_CALLS_DO_SYS_OPEN]; + fd_publish_aggregated[NETDATA_FD_SYSCALL_OPEN].nerr = fd_hash_values[NETDATA_KEY_ERROR_DO_SYS_OPEN]; + + fd_publish_aggregated[NETDATA_FD_SYSCALL_CLOSE].ncall = fd_hash_values[NETDATA_KEY_CALLS_CLOSE_FD]; + fd_publish_aggregated[NETDATA_FD_SYSCALL_CLOSE].nerr = fd_hash_values[NETDATA_KEY_ERROR_CLOSE_FD]; + + write_count_chart(NETDATA_FILE_OPEN_CLOSE_COUNT, NETDATA_FILESYSTEM_FAMILY, fd_publish_aggregated, + NETDATA_FD_SYSCALL_END); + + if (em->mode < MODE_ENTRY) { + write_err_chart(NETDATA_FILE_OPEN_ERR_COUNT, NETDATA_FILESYSTEM_FAMILY, + fd_publish_aggregated, NETDATA_FD_SYSCALL_END); + } +} + +/** + * Read global counter + * + * 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_fd_read_global_tables(netdata_idx_t *stats, int maps_per_core) +{ + ebpf_read_global_table_stats(fd_hash_values, + fd_values, + fd_maps[NETDATA_FD_GLOBAL_STATS].map_fd, + maps_per_core, + NETDATA_KEY_CALLS_DO_SYS_OPEN, + NETDATA_FD_COUNTER); + + ebpf_read_global_table_stats(stats, + fd_values, + fd_maps[NETDATA_FD_CONTROLLER].map_fd, + maps_per_core, + NETDATA_CONTROLLER_PID_TABLE_ADD, + NETDATA_CONTROLLER_END); +} + +/** + * 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 fd_apps_accumulator(netdata_fd_stat_t *out, int maps_per_core) +{ + int i, end = (maps_per_core) ? ebpf_nprocs : 1; + netdata_fd_stat_t *total = &out[0]; + for (i = 1; i < end; i++) { + netdata_fd_stat_t *w = &out[i]; + total->open_call += w->open_call; + total->close_call += w->close_call; + total->open_err += w->open_err; + total->close_err += w->close_err; + } +} + +/** + * Read 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 ebpf_read_fd_apps_table(int maps_per_core, int max_period) +{ + netdata_fd_stat_t *fv = fd_vector; + int fd = fd_maps[NETDATA_FD_PID_STATS].map_fd; + size_t length = sizeof(netdata_fd_stat_t); + if (maps_per_core) + length *= ebpf_nprocs; + + uint32_t key = 0, next_key = 0; + while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { + if (bpf_map_lookup_elem(fd, &key, fv)) { + goto end_fd_loop; + } + + fd_apps_accumulator(fv, maps_per_core); + + ebpf_pid_stat_t *pid_stat = ebpf_get_pid_entry(key, fv->tgid); + if (pid_stat) { + netdata_fd_stat_t *publish_fd = &pid_stat->fd; + if (!publish_fd->ct || publish_fd->ct != fv->ct) { + memcpy(publish_fd, &fv[0], sizeof(netdata_fd_stat_t)); + pid_stat->not_updated = 0; + } else if (++pid_stat->not_updated >= max_period) { + bpf_map_delete_elem(fd, &key); + pid_stat->not_updated = 0; + } + } + +end_fd_loop: + // We are cleaning to avoid passing data read from one process to other. + memset(fv, 0, length); + key = next_key; + } +} + +/** + * Sum PIDs + * + * Sum values for all targets. + * + * @param fd the output + * @param root list of pids + */ +static void ebpf_fd_sum_pids(netdata_fd_stat_t *fd, struct ebpf_pid_on_target *root) +{ + memset(fd, 0, sizeof(netdata_fd_stat_t)); + + while (root) { + int32_t pid = root->pid; + ebpf_pid_stat_t *pid_stat = ebpf_get_pid_entry(pid, 0); + if (pid_stat) { + netdata_fd_stat_t *w = &pid_stat->fd; + fd->open_call += w->open_call; + fd->close_call += w->close_call; + fd->open_err += w->open_err; + fd->close_err += w->close_err; + } + + root = root->next; + } +} + +/** + * Resume apps data + */ +void ebpf_fd_resume_apps_data() +{ + struct ebpf_target *w; + + for (w = apps_groups_root_target; w; w = w->next) { + if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_FD_IDX)))) + continue; + + ebpf_fd_sum_pids(&w->fd, w->root_pid); + } +} + +/** + * DCstat thread + * + * Thread used to generate dcstat charts. + * + * @param ptr a pointer to `struct ebpf_module` + * + * @return It always return NULL + */ +void *ebpf_read_fd_thread(void *ptr) +{ + heartbeat_t hb; + heartbeat_init(&hb); + + ebpf_module_t *em = (ebpf_module_t *)ptr; + + int maps_per_core = em->maps_per_core; + int update_every = em->update_every; + + int counter = update_every - 1; + + uint32_t lifetime = em->lifetime; + uint32_t running_time = 0; + usec_t period = update_every * USEC_PER_SEC; + int max_period = update_every * EBPF_CLEANUP_FACTOR; + while (!ebpf_plugin_stop() && running_time < lifetime) { + (void)heartbeat_next(&hb, period); + if (ebpf_plugin_stop() || ++counter != update_every) + continue; + + pthread_mutex_lock(&collect_data_mutex); + ebpf_read_fd_apps_table(maps_per_core, max_period); + ebpf_fd_resume_apps_data(); + pthread_mutex_unlock(&collect_data_mutex); + + counter = 0; + + 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); + } + + return NULL; +} + +/** + * Update cgroup + * + * Update cgroup data collected per PID. + * + * @param maps_per_core do I need to read all cores? + */ +static void ebpf_update_fd_cgroup() +{ + 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_fd_stat_t *out = &pids->fd; + ebpf_pid_stat_t *local_pid = ebpf_get_pid_entry(pid, 0); + if (local_pid) { + netdata_fd_stat_t *in = &local_pid->fd; + + memcpy(out, in, sizeof(netdata_fd_stat_t)); + } + } + } + pthread_mutex_unlock(&mutex_cgroup_shm); +} + +/** + * Send data to Netdata calling auxiliary functions. + * + * @param em the structure with thread information + * @param root the target list. +*/ +void ebpf_fd_send_apps_data(ebpf_module_t *em, struct ebpf_target *root) +{ + struct ebpf_target *w; + pthread_mutex_lock(&collect_data_mutex); + for (w = root; w; w = w->next) { + if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_FD_IDX)))) + continue; + + ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_file_open"); + write_chart_dimension("calls", w->fd.open_call); + ebpf_write_end_chart(); + + if (em->mode < MODE_ENTRY) { + ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_file_open_error"); + write_chart_dimension("calls", w->fd.open_err); + ebpf_write_end_chart(); + } + + ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_file_closed"); + write_chart_dimension("calls", w->fd.close_call); + ebpf_write_end_chart(); + + if (em->mode < MODE_ENTRY) { + ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_file_close_error"); + write_chart_dimension("calls", w->fd.close_err); + ebpf_write_end_chart(); + } + } + pthread_mutex_unlock(&collect_data_mutex); +} + +/** + * Sum PIDs + * + * Sum values for all targets. + * + * @param fd structure used to store data + * @param pids input data + */ +static void ebpf_fd_sum_cgroup_pids(netdata_fd_stat_t *fd, struct pid_on_target2 *pids) +{ + netdata_fd_stat_t accumulator; + memset(&accumulator, 0, sizeof(accumulator)); + + while (pids) { + netdata_fd_stat_t *w = &pids->fd; + + accumulator.open_err += w->open_err; + accumulator.open_call += w->open_call; + accumulator.close_call += w->close_call; + accumulator.close_err += w->close_err; + + pids = pids->next; + } + + fd->open_call = (accumulator.open_call >= fd->open_call) ? accumulator.open_call : fd->open_call; + fd->open_err = (accumulator.open_err >= fd->open_err) ? accumulator.open_err : fd->open_err; + fd->close_call = (accumulator.close_call >= fd->close_call) ? accumulator.close_call : fd->close_call; + fd->close_err = (accumulator.close_err >= fd->close_err) ? accumulator.close_err : fd->close_err; +} + +/** + * Create specific file descriptor charts + * + * Create charts for cgroup/application. + * + * @param type the chart type. + * @param em the main thread structure. + */ +static void ebpf_create_specific_fd_charts(char *type, ebpf_module_t *em) +{ + char *label = (!strncmp(type, "cgroup_", 7)) ? &type[7] : type; + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_OPEN, "Number of open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_CGROUP_FD_OPEN_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5400, + ebpf_create_global_dimension, + &fd_publish_aggregated[NETDATA_FD_SYSCALL_OPEN], + 1, em->update_every, NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + + if (em->mode < MODE_ENTRY) { + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, "Fails to open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_CGROUP_FD_OPEN_ERR_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5401, + ebpf_create_global_dimension, + &fd_publish_aggregated[NETDATA_FD_SYSCALL_OPEN], + 1, em->update_every, + NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + } + + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_CLOSED, "Files closed", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_CGROUP_FD_CLOSE_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5402, + ebpf_create_global_dimension, + &fd_publish_aggregated[NETDATA_FD_SYSCALL_CLOSE], + 1, em->update_every, NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + + if (em->mode < MODE_ENTRY) { + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, "Fails to close files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_CGROUP_FD_CLOSE_ERR_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5403, + ebpf_create_global_dimension, + &fd_publish_aggregated[NETDATA_FD_SYSCALL_CLOSE], + 1, em->update_every, + NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("cgroup_name", label, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + } +} + +/** + * Obsolete specific file descriptor charts + * + * Obsolete charts for cgroup/application. + * + * @param type the chart type. + * @param em the main thread structure. + */ +static void ebpf_obsolete_specific_fd_charts(char *type, ebpf_module_t *em) +{ + ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_FILE_OPEN, "", "Number of open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_FD_OPEN_CONTEXT, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5400, em->update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, "", "Fails to open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_FD_OPEN_ERR_CONTEXT, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5401, em->update_every); + } + + ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_FILE_CLOSED, "", "Files closed", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_FD_CLOSE_CONTEXT, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5402, em->update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, "", "Fails to close files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_FD_CLOSE_ERR_CONTEXT, + NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5403, em->update_every); + } +} + +/* + * Send specific file descriptor data + * + * Send data for specific cgroup/apps. + * + * @param type chart type + * @param values structure with values that will be sent to netdata + */ +static void ebpf_send_specific_fd_data(char *type, netdata_fd_stat_t *values, ebpf_module_t *em) +{ + ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_FILE_OPEN, ""); + write_chart_dimension(fd_publish_aggregated[NETDATA_FD_SYSCALL_OPEN].name, (long long)values->open_call); + ebpf_write_end_chart(); + + if (em->mode < MODE_ENTRY) { + ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, ""); + write_chart_dimension(fd_publish_aggregated[NETDATA_FD_SYSCALL_OPEN].name, (long long)values->open_err); + ebpf_write_end_chart(); + } + + ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_FILE_CLOSED, ""); + write_chart_dimension(fd_publish_aggregated[NETDATA_FD_SYSCALL_CLOSE].name, (long long)values->close_call); + ebpf_write_end_chart(); + + if (em->mode < MODE_ENTRY) { + ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, ""); + write_chart_dimension(fd_publish_aggregated[NETDATA_FD_SYSCALL_CLOSE].name, (long long)values->close_err); + ebpf_write_end_chart(); + } +} + +/** + * Create systemd file descriptor charts + * + * Create charts when systemd is enabled + * + * @param em the main collector structure + **/ +static void ebpf_create_systemd_fd_charts(ebpf_module_t *em) +{ + static ebpf_systemd_args_t data_open = { + .title = "Number of open files", + .units = EBPF_COMMON_UNITS_CALLS_PER_SEC, + .family = NETDATA_APPS_FILE_GROUP, + .charttype = NETDATA_EBPF_CHART_TYPE_STACKED, + .order = 20270, + .algorithm = EBPF_CHART_ALGORITHM_INCREMENTAL, + .context = NETDATA_SYSTEMD_FD_OPEN_CONTEXT, + .module = NETDATA_EBPF_MODULE_NAME_FD, + .update_every = 0, + .suffix = NETDATA_SYSCALL_APPS_FILE_OPEN, + .dimension = "calls" + }; + + static ebpf_systemd_args_t data_open_error = { + .title = "Fails to open files", + .units = EBPF_COMMON_UNITS_CALLS_PER_SEC, + .family = NETDATA_APPS_FILE_GROUP, + .charttype = NETDATA_EBPF_CHART_TYPE_STACKED, + .order = 20271, + .algorithm = EBPF_CHART_ALGORITHM_INCREMENTAL, + .context = NETDATA_SYSTEMD_FD_OPEN_ERR_CONTEXT, + .module = NETDATA_EBPF_MODULE_NAME_FD, + .update_every = 0, + .suffix = NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, + .dimension = "calls" + }; + + static ebpf_systemd_args_t data_close = { + .title = "Files closed", + .units = EBPF_COMMON_UNITS_CALLS_PER_SEC, + .family = NETDATA_APPS_FILE_GROUP, + .charttype = NETDATA_EBPF_CHART_TYPE_STACKED, + .order = 20272, + .algorithm = EBPF_CHART_ALGORITHM_INCREMENTAL, + .context = NETDATA_SYSTEMD_FD_CLOSE_CONTEXT, + .module = NETDATA_EBPF_MODULE_NAME_FD, + .update_every = 0, + .suffix = NETDATA_SYSCALL_APPS_FILE_CLOSED, + .dimension = "calls" + }; + + static ebpf_systemd_args_t data_close_error = { + .title = "Fails to close files", + .units = EBPF_COMMON_UNITS_CALLS_PER_SEC, + .family = NETDATA_APPS_FILE_GROUP, + .charttype = NETDATA_EBPF_CHART_TYPE_STACKED, + .order = 20273, + .algorithm = EBPF_CHART_ALGORITHM_INCREMENTAL, + .context = NETDATA_SYSTEMD_FD_OPEN_ERR_CONTEXT, + .module = NETDATA_EBPF_MODULE_NAME_FD, + .update_every = 0, + .suffix = NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, + .dimension = "calls" + }; + + if (!data_open.update_every) + data_open.update_every = data_open_error.update_every = + data_close.update_every = data_close_error.update_every = em->update_every; + + ebpf_cgroup_target_t *w; + netdata_run_mode_t mode = em->mode; + for (w = ebpf_cgroup_pids; w; w = w->next) { + if (unlikely(!w->systemd || w->flags & NETDATA_EBPF_SERVICES_HAS_FD_CHART)) + continue; + + data_open.id = data_open_error.id = data_close.id = data_close_error.id = w->name; + ebpf_create_charts_on_systemd(&data_open); + ebpf_create_charts_on_systemd(&data_close); + if (mode < MODE_ENTRY) { + ebpf_create_charts_on_systemd(&data_open_error); + ebpf_create_charts_on_systemd(&data_close_error); + } + + w->flags |= NETDATA_EBPF_SERVICES_HAS_FD_CHART; + } +} + +/** + * Send Systemd charts + * + * Send collected data to Netdata. + * + * @param em the main collector structure + */ +static void ebpf_send_systemd_fd_charts(ebpf_module_t *em) +{ + ebpf_cgroup_target_t *ect; + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + if (unlikely(!(ect->flags & NETDATA_EBPF_SERVICES_HAS_FD_CHART)) ) { + continue; + } + + ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, ect->name, NETDATA_SYSCALL_APPS_FILE_OPEN); + write_chart_dimension("calls", ect->publish_systemd_fd.open_call); + ebpf_write_end_chart(); + + if (em->mode < MODE_ENTRY) { + ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, ect->name, NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR); + write_chart_dimension("calls", ect->publish_systemd_fd.open_err); + ebpf_write_end_chart(); + } + + ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, ect->name, NETDATA_SYSCALL_APPS_FILE_CLOSED); + write_chart_dimension("calls", ect->publish_systemd_fd.close_call); + ebpf_write_end_chart(); + + if (em->mode < MODE_ENTRY) { + ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, ect->name, NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR); + write_chart_dimension("calls", ect->publish_systemd_fd.close_err); + ebpf_write_end_chart(); + } + } +} + +/** + * Send data to Netdata calling auxiliary functions. + * + * @param em the main collector structure +*/ +static void ebpf_fd_send_cgroup_data(ebpf_module_t *em) +{ + pthread_mutex_lock(&mutex_cgroup_shm); + ebpf_cgroup_target_t *ect; + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + ebpf_fd_sum_cgroup_pids(&ect->publish_systemd_fd, ect->pids); + } + + if (shm_ebpf_cgroup.header->systemd_enabled) { + if (send_cgroup_chart) { + ebpf_create_systemd_fd_charts(em); + } + + ebpf_send_systemd_fd_charts(em); + } + + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + if (ect->systemd) + continue; + + if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_FD_CHART) && ect->updated) { + ebpf_create_specific_fd_charts(ect->name, em); + ect->flags |= NETDATA_EBPF_CGROUP_HAS_FD_CHART; + } + + if (ect->flags & NETDATA_EBPF_CGROUP_HAS_FD_CHART ) { + if (ect->updated) { + ebpf_send_specific_fd_data(ect->name, &ect->publish_systemd_fd, em); + } else { + ebpf_obsolete_specific_fd_charts(ect->name, em); + ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_FD_CHART; + } + } + } + + pthread_mutex_unlock(&mutex_cgroup_shm); +} + +/** +* Main loop for this collector. +*/ +static void fd_collector(ebpf_module_t *em) +{ + int cgroups = em->cgroup_charts; + heartbeat_t hb; + heartbeat_init(&hb); + int update_every = em->update_every; + 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_stop() && running_time < lifetime) { + (void)heartbeat_next(&hb, USEC_PER_SEC); + + if (ebpf_plugin_stop() || ++counter != update_every) + continue; + + counter = 0; + netdata_apps_integration_flags_t apps = em->apps_charts; + ebpf_fd_read_global_tables(stats, maps_per_core); + + if (cgroups && shm_ebpf_cgroup.header) + ebpf_update_fd_cgroup(); + + pthread_mutex_lock(&lock); + + ebpf_fd_send_data(em); + + if (apps & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) + ebpf_fd_send_apps_data(em, apps_groups_root_target); + + if (cgroups && shm_ebpf_cgroup.header) + ebpf_fd_send_cgroup_data(em); + + pthread_mutex_unlock(&lock); + + 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); + } +} + +/***************************************************************** + * + * CREATE CHARTS + * + *****************************************************************/ + +/** + * 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_fd_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_file_open", + "Number of open files", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_file_open", + 20220, + update_every, + NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_cmd(NETDATA_APP_FAMILY, + w->clean_name, + "_ebpf_file_open_error", + "Fails to open files.", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_file_open_error", + 20221, + update_every, + NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); + } + + ebpf_write_chart_cmd(NETDATA_APP_FAMILY, + w->clean_name, + "_ebpf_file_closed", + "Files closed.", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_file_closed", + 20222, + update_every, + NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); + + if (em->mode < MODE_ENTRY) { + ebpf_write_chart_cmd(NETDATA_APP_FAMILY, + w->clean_name, + "_ebpf_file_close_error", + "Fails to close files.", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_APPS_FILE_FDS, + NETDATA_EBPF_CHART_TYPE_STACKED, + "app.ebpf_file_close_error", + 20223, + update_every, + NETDATA_EBPF_MODULE_NAME_FD); + ebpf_create_chart_labels("app_group", w->name, RRDLABEL_SRC_AUTO); + ebpf_commit_label(); + fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); + } + + w->charts_created |= 1<<EBPF_MODULE_FD_IDX; + } + + em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED; +} + +/** + * Create global charts + * + * Call ebpf_create_chart to create the charts for the collector. + * + * @param em a pointer to the structure with the default values. + */ +static void ebpf_create_fd_global_charts(ebpf_module_t *em) +{ + ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY, + NETDATA_FILE_OPEN_CLOSE_COUNT, + "Open and close calls", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_FILE_GROUP, + NETDATA_FS_FILEDESCRIPTOR_CONTEXT, + NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_CHART_PRIO_EBPF_FD_CHARTS, + ebpf_create_global_dimension, + fd_publish_aggregated, + NETDATA_FD_SYSCALL_END, + em->update_every, NETDATA_EBPF_MODULE_NAME_FD); + + if (em->mode < MODE_ENTRY) { + ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY, + NETDATA_FILE_OPEN_ERR_COUNT, + "Open fails", + EBPF_COMMON_UNITS_CALLS_PER_SEC, + NETDATA_FILE_GROUP, + NETDATA_FS_FILEDESCRIPTOR_ERROR_CONTEXT, + NETDATA_EBPF_CHART_TYPE_LINE, + NETDATA_CHART_PRIO_EBPF_FD_CHARTS + 1, + ebpf_create_global_dimension, + fd_publish_aggregated, + NETDATA_FD_SYSCALL_END, + em->update_every, NETDATA_EBPF_MODULE_NAME_FD); + } + + fflush(stdout); +} + +/***************************************************************** + * + * MAIN THREAD + * + *****************************************************************/ + +/** + * 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. + */ +static inline void ebpf_fd_allocate_global_vectors() +{ + fd_vector = callocz((size_t)ebpf_nprocs, sizeof(netdata_fd_stat_t)); + fd_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_idx_t)); +} + +/* + * Load BPF + * + * Load BPF files. + * + * @param em the structure with configuration + */ +static int ebpf_fd_load_bpf(ebpf_module_t *em) +{ +#ifdef LIBBPF_MAJOR_VERSION + ebpf_define_map_type(fd_maps, em->maps_per_core, running_on_kernel); +#endif + + int ret = 0; + ebpf_adjust_apps_cgroup(em, em->targets[NETDATA_FD_SYSCALL_OPEN].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 { + fd_bpf_obj = fd_bpf__open(); + if (!fd_bpf_obj) + ret = -1; + else + ret = ebpf_fd_load_and_attach(fd_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_fd_thread(void *ptr) +{ + ebpf_module_t *em = (ebpf_module_t *)ptr; + + CLEANUP_FUNCTION_REGISTER(ebpf_fd_exit) cleanup_ptr = em; + + em->maps = fd_maps; + +#ifdef LIBBPF_MAJOR_VERSION + ebpf_adjust_thread_load(em, default_btf); +#endif + if (ebpf_fd_load_bpf(em)) { + goto endfd; + } + + ebpf_fd_allocate_global_vectors(); + + int algorithms[NETDATA_FD_SYSCALL_END] = { + NETDATA_EBPF_INCREMENTAL_IDX, NETDATA_EBPF_INCREMENTAL_IDX + }; + + ebpf_global_labels(fd_aggregated_data, fd_publish_aggregated, fd_dimension_names, fd_id_names, + algorithms, NETDATA_FD_SYSCALL_END); + + pthread_mutex_lock(&lock); + ebpf_create_fd_global_charts(em); + ebpf_update_stats(&plugin_statistics, em); + ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_ADD); + + pthread_mutex_unlock(&lock); + + ebpf_read_fd.thread = nd_thread_create(ebpf_read_fd.name, NETDATA_THREAD_OPTION_DEFAULT, ebpf_read_fd_thread, em); + + fd_collector(em); + +endfd: + ebpf_update_disabled_plugin_stats(em); + + return NULL; +} |