diff options
Diffstat (limited to 'collectors/ebpf.plugin/ebpf_fd.c')
| -rw-r--r-- | collectors/ebpf.plugin/ebpf_fd.c | 865 |
1 files changed, 865 insertions, 0 deletions
diff --git a/collectors/ebpf.plugin/ebpf_fd.c b/collectors/ebpf.plugin/ebpf_fd.c new file mode 100644 index 000000000..6eecf5847 --- /dev/null +++ b/collectors/ebpf.plugin/ebpf_fd.c @@ -0,0 +1,865 @@ +// 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" }; + +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}, + {.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}, + {.name = "fd_ctrl", .internal_input = NETDATA_CONTROLLER_END, + .user_input = 0, + .type = NETDATA_EBPF_MAP_CONTROLLER, + .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED}, + {.name = NULL, .internal_input = 0, .user_input = 0, + .type = NETDATA_EBPF_MAP_CONTROLLER, + .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED}}; + + +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 struct bpf_link **probe_links = NULL; +static struct bpf_object *objects = NULL; + +struct netdata_static_thread fd_thread = {"FD KERNEL", NULL, NULL, 1, NULL, + NULL, NULL}; +static int read_thread_closed = 1; +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_fd_stat_t **fd_pid = NULL; + +/***************************************************************** + * + * FUNCTIONS TO CLOSE THE THREAD + * + *****************************************************************/ + +/** + * Clean PID structures + * + * Clean the allocated structures. + */ +void clean_fd_pid_structures() { + struct pid_stat *pids = root_of_pids; + while (pids) { + freez(fd_pid[pids->pid]); + + pids = pids->next; + } +} + +/** + * Clean up the main thread. + * + * @param ptr thread data. + */ +static void ebpf_fd_cleanup(void *ptr) +{ + ebpf_module_t *em = (ebpf_module_t *)ptr; + if (!em->enabled) + return; + + heartbeat_t hb; + heartbeat_init(&hb); + uint32_t tick = 2 * USEC_PER_MS; + while (!read_thread_closed) { + usec_t dt = heartbeat_next(&hb, tick); + UNUSED(dt); + } + + ebpf_cleanup_publish_syscall(fd_publish_aggregated); + freez(fd_thread.thread); + freez(fd_values); + freez(fd_vector); + + if (probe_links) { + struct bpf_program *prog; + size_t i = 0 ; + bpf_object__for_each_program(prog, objects) { + bpf_link__destroy(probe_links[i]); + i++; + } + bpf_object__close(objects); + } +} + +/***************************************************************** + * + * 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 + */ +static void read_global_table() +{ + uint32_t idx; + netdata_idx_t *val = fd_hash_values; + netdata_idx_t *stored = fd_values; + int fd = fd_maps[NETDATA_FD_GLOBAL_STATS].map_fd; + + for (idx = NETDATA_KEY_CALLS_DO_SYS_OPEN; idx < NETDATA_FD_COUNTER; idx++) { + if (!bpf_map_lookup_elem(fd, &idx, stored)) { + int i; + int end = ebpf_nprocs; + netdata_idx_t total = 0; + for (i = 0; i < end; i++) + total += stored[i]; + + val[idx] = total; + } + } +} + +/** + * File descriptor read hash + * + * This is the thread callback. + * This thread is necessary, because we cannot freeze the whole plugin to read the data. + * + * @param ptr It is a NULL value for this thread. + * + * @return It always returns NULL. + */ +void *ebpf_fd_read_hash(void *ptr) +{ + read_thread_closed = 0; + + heartbeat_t hb; + heartbeat_init(&hb); + + ebpf_module_t *em = (ebpf_module_t *)ptr; + usec_t step = NETDATA_FD_SLEEP_MS * em->update_every; + while (!close_ebpf_plugin) { + usec_t dt = heartbeat_next(&hb, step); + (void)dt; + + read_global_table(); + } + + read_thread_closed = 1; + return NULL; +} + +/** + * Apps Accumulator + * + * Sum all values read from kernel and store in the first address. + * + * @param out the vector with read values. + */ +static void fd_apps_accumulator(netdata_fd_stat_t *out) +{ + int i, end = (running_on_kernel >= NETDATA_KERNEL_V4_15) ? 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; + } +} + +/** + * Fill PID + * + * Fill PID structures + * + * @param current_pid pid that we are collecting data + * @param out values read from hash tables; + */ +static void fd_fill_pid(uint32_t current_pid, netdata_fd_stat_t *publish) +{ + netdata_fd_stat_t *curr = fd_pid[current_pid]; + if (!curr) { + curr = callocz(1, sizeof(netdata_fd_stat_t)); + fd_pid[current_pid] = curr; + } + + memcpy(curr, &publish[0], sizeof(netdata_fd_stat_t)); +} + +/** + * Read APPS table + * + * Read the apps table and store data inside the structure. + */ +static void read_apps_table() +{ + netdata_fd_stat_t *fv = fd_vector; + uint32_t key; + struct pid_stat *pids = root_of_pids; + int fd = fd_maps[NETDATA_FD_PID_STATS].map_fd; + size_t length = sizeof(netdata_fd_stat_t) * ebpf_nprocs; + while (pids) { + key = pids->pid; + + if (bpf_map_lookup_elem(fd, &key, fv)) { + pids = pids->next; + continue; + } + + fd_apps_accumulator(fv); + + fd_fill_pid(key, fv); + + // We are cleaning to avoid passing data read from one process to other. + memset(fv, 0, length); + + pids = pids->next; + } +} + +/** + * Update cgroup + * + * Update cgroup data based in + */ +static void ebpf_update_fd_cgroup() +{ + ebpf_cgroup_target_t *ect ; + 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) * ebpf_nprocs; + + 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; + if (likely(fd_pid) && fd_pid[pid]) { + netdata_fd_stat_t *in = fd_pid[pid]; + + memcpy(out, in, sizeof(netdata_fd_stat_t)); + } else { + memset(fv, 0, length); + if (!bpf_map_lookup_elem(fd, &pid, fv)) { + fd_apps_accumulator(fv); + + memcpy(out, fv, sizeof(netdata_fd_stat_t)); + } + } + } + } + pthread_mutex_unlock(&mutex_cgroup_shm); +} + +/** + * 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 pid_on_target *root) +{ + uint32_t open_call = 0; + uint32_t close_call = 0; + uint32_t open_err = 0; + uint32_t close_err = 0; + + while (root) { + int32_t pid = root->pid; + netdata_fd_stat_t *w = fd_pid[pid]; + if (w) { + open_call += w->open_call; + close_call += w->close_call; + open_err += w->open_err; + close_err += w->close_err; + } + + root = root->next; + } + + // These conditions were added, because we are using incremental algorithm + fd->open_call = (open_call >= fd->open_call) ? open_call : fd->open_call; + fd->close_call = (close_call >= fd->close_call) ? close_call : fd->close_call; + fd->open_err = (open_err >= fd->open_err) ? open_err : fd->open_err; + fd->close_err = (close_err >= fd->close_err) ? close_err : fd->close_err; +} + +/** + * 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 target *root) +{ + struct target *w; + for (w = root; w; w = w->next) { + if (unlikely(w->exposed && w->processes)) { + ebpf_fd_sum_pids(&w->fd, w->root_pid); + } + } + + write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_FILE_OPEN); + for (w = root; w; w = w->next) { + if (unlikely(w->exposed && w->processes)) { + write_chart_dimension(w->name, w->fd.open_call); + } + } + write_end_chart(); + + if (em->mode < MODE_ENTRY) { + write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR); + for (w = root; w; w = w->next) { + if (unlikely(w->exposed && w->processes)) { + write_chart_dimension(w->name, w->fd.open_err); + } + } + write_end_chart(); + } + + write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_FILE_CLOSED); + for (w = root; w; w = w->next) { + if (unlikely(w->exposed && w->processes)) { + write_chart_dimension(w->name, w->fd.close_call); + } + } + write_end_chart(); + + if (em->mode < MODE_ENTRY) { + write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR); + for (w = root; w; w = w->next) { + if (unlikely(w->exposed && w->processes)) { + write_chart_dimension(w->name, w->fd.close_err); + } + } + write_end_chart(); + } +} + +/** + * 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) +{ + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_OPEN, "Number of open files", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_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_SWAP); + + if (em->mode < MODE_ENTRY) { + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, "Fails to open files", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_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_SWAP); + } + + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_CLOSED, "Files closed", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_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_SWAP); + + if (em->mode < MODE_ENTRY) { + ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, "Fails to close files", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_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_SWAP); + } +} + +/** + * 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_DIMENSION_CALL, 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_DIMENSION_CALL, 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_DIMENSION_CALL, 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_DIMENSION_CALL, 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) +{ + 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); + write_end_chart(); + + if (em->mode < MODE_ENTRY) { + 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); + write_end_chart(); + } + + 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); + write_end_chart(); + + if (em->mode < MODE_ENTRY) { + 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); + 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) +{ + ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_FILE_OPEN, "Number of open files", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, 20061, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_FD_OPEN_CONTEXT, + NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, "Fails to open files", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, 20062, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_FD_OPEN_ERR_CONTEXT, + NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every); + } + + ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_FILE_CLOSED, "Files closed", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, 20063, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_FD_CLOSE_CONTEXT, + NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every); + + if (em->mode < MODE_ENTRY) { + ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, "Fails to close files", + EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_FILE_CGROUP_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, 20064, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_FD_CLOSE_ERR_CONTEXT, + NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every); + } +} + +/** + * Send Systemd charts + * + * Send collected data to Netdata. + * + * @param em the main collector structure + * + * @return It returns the status for chart creation, if it is necessary to remove a specific dimension zero is returned + * otherwise function returns 1 to avoid chart recreation + */ +static int ebpf_send_systemd_fd_charts(ebpf_module_t *em) +{ + int ret = 1; + ebpf_cgroup_target_t *ect; + write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_FILE_OPEN); + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + if (unlikely(ect->systemd) && unlikely(ect->updated)) { + write_chart_dimension(ect->name, ect->publish_systemd_fd.open_call); + } else + ret = 0; + } + write_end_chart(); + + if (em->mode < MODE_ENTRY) { + write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR); + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + if (unlikely(ect->systemd) && unlikely(ect->updated)) { + write_chart_dimension(ect->name, ect->publish_systemd_fd.open_err); + } + } + write_end_chart(); + } + + write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_FILE_CLOSED); + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + if (unlikely(ect->systemd) && unlikely(ect->updated)) { + write_chart_dimension(ect->name, ect->publish_systemd_fd.close_call); + } + } + write_end_chart(); + + if (em->mode < MODE_ENTRY) { + write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR); + for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { + if (unlikely(ect->systemd) && unlikely(ect->updated)) { + write_chart_dimension(ect->name, ect->publish_systemd_fd.close_err); + } + } + write_end_chart(); + } + + return ret; +} + +/** + * Send data to Netdata calling auxiliary functions. + * + * @param em the main collector structure +*/ +static void ebpf_fd_send_cgroup_data(ebpf_module_t *em) +{ + if (!ebpf_cgroup_pids) + return; + + 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); + } + + int has_systemd = shm_ebpf_cgroup.header->systemd_enabled; + if (has_systemd) { + static int systemd_charts = 0; + if (!systemd_charts) { + ebpf_create_systemd_fd_charts(em); + systemd_charts = 1; + } + + systemd_charts = 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) +{ + fd_thread.thread = mallocz(sizeof(netdata_thread_t)); + fd_thread.start_routine = ebpf_fd_read_hash; + + netdata_thread_create(fd_thread.thread, fd_thread.name, NETDATA_THREAD_OPTION_JOINABLE, + ebpf_fd_read_hash, em); + + int apps = em->apps_charts; + int cgroups = em->cgroup_charts; + int update_every = em->update_every; + int counter = update_every - 1; + while (!close_ebpf_plugin) { + pthread_mutex_lock(&collect_data_mutex); + pthread_cond_wait(&collect_data_cond_var, &collect_data_mutex); + + if (++counter == update_every) { + counter = 0; + if (apps) + read_apps_table(); + + if (cgroups) + ebpf_update_fd_cgroup(); + + pthread_mutex_lock(&lock); + + ebpf_fd_send_data(em); + + if (apps) + ebpf_fd_send_apps_data(em, apps_groups_root_target); + + if (cgroups) + ebpf_fd_send_cgroup_data(em); + + pthread_mutex_unlock(&lock); + } + + pthread_mutex_unlock(&collect_data_mutex); + } +} + +/***************************************************************** + * + * 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 target *root = ptr; + ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_FILE_OPEN, + "Number of open files", + EBPF_COMMON_DIMENSION_CALL, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + 20061, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], + root, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS); + + if (em->mode < MODE_ENTRY) { + ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR, + "Fails to open files", + EBPF_COMMON_DIMENSION_CALL, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + 20062, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], + root, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS); + } + + ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_FILE_CLOSED, + "Files closed", + EBPF_COMMON_DIMENSION_CALL, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + 20063, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], + root, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS); + + if (em->mode < MODE_ENTRY) { + ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR, + "Fails to close files", + EBPF_COMMON_DIMENSION_CALL, + NETDATA_APPS_FILE_GROUP, + NETDATA_EBPF_CHART_TYPE_STACKED, + 20064, + ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], + root, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS); + } +} + +/** + * 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_DIMENSION_CALL, + NETDATA_FILE_GROUP, + NULL, + 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_DIMENSION_CALL, + NETDATA_FILE_GROUP, + NULL, + 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); + } +} + +/***************************************************************** + * + * 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. + * + * @param apps is apps enabled? + */ +static void ebpf_fd_allocate_global_vectors(int apps) +{ + if (apps) + fd_pid = callocz((size_t)pid_max, sizeof(netdata_fd_stat_t *)); + + fd_vector = callocz((size_t)ebpf_nprocs, sizeof(netdata_fd_stat_t)); + + fd_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_idx_t)); +} + +/** + * 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) +{ + netdata_thread_cleanup_push(ebpf_fd_cleanup, ptr); + + ebpf_module_t *em = (ebpf_module_t *)ptr; + em->maps = fd_maps; + + if (!em->enabled) + goto endfd; + + ebpf_fd_allocate_global_vectors(em->apps_charts); + + probe_links = ebpf_load_program(ebpf_plugin_dir, em, kernel_string, &objects); + if (!probe_links) { + goto endfd; + } + + 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); + pthread_mutex_unlock(&lock); + + fd_collector(em); + +endfd: + netdata_thread_cleanup_pop(1); + return NULL; +} |