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Diffstat (limited to 'collectors/ebpf.plugin/ebpf_fd.c')
-rw-r--r--collectors/ebpf.plugin/ebpf_fd.c1431
1 files changed, 1431 insertions, 0 deletions
diff --git a/collectors/ebpf.plugin/ebpf_fd.c b/collectors/ebpf.plugin/ebpf_fd.c
new file mode 100644
index 00000000..3c8f30d3
--- /dev/null
+++ b/collectors/ebpf.plugin/ebpf_fd.c
@@ -0,0 +1,1431 @@
+// 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 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"};
+
+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}};
+
+#ifdef NETDATA_DEV_MODE
+int fd_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_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);
+ bpf_program__set_autoload(obj->progs.netdata_release_task_fd_kprobe, 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);
+ bpf_program__set_autoload(obj->progs.netdata_release_task_fd_fentry, 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);
+ bpf_program__set_attach_target(obj->progs.netdata_release_task_fd_fentry, 0, EBPF_COMMON_FNCT_CLEAN_UP);
+
+ 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);
+ int 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;
+
+ obj->links.netdata_release_task_fd_kprobe = bpf_program__attach_kprobe(obj->progs.netdata_release_task_fd_kprobe,
+ false,
+ EBPF_COMMON_FNCT_CLEAN_UP);
+ ret = libbpf_get_error(obj->links.netdata_release_task_fd_kprobe);
+ 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]);
+}
+
+/**
+ * Disable Release Task
+ *
+ * Disable release task when apps is not enabled.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static void ebpf_fd_disable_release_task(struct fd_bpf *obj)
+{
+ bpf_program__set_autoload(obj->progs.netdata_release_task_fd_kprobe, false);
+ bpf_program__set_autoload(obj->progs.netdata_release_task_fd_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_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);
+ // TODO: Remove this in next PR, because this specific trampoline has an error.
+ bpf_program__set_autoload(obj->progs.netdata_release_task_fd_fentry, false);
+ } else {
+ ebpf_disable_trampoline(obj);
+ ebpf_disable_specific_probes(obj);
+ }
+
+ ebpf_fd_adjust_map(obj, em);
+
+ if (!em->apps_charts && !em->cgroup_charts)
+ ebpf_fd_disable_release_task(obj);
+
+ 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)
+{
+ ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
+ NETDATA_SYSCALL_APPS_FILE_OPEN,
+ "",
+ "Number of open files",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_FILE_CGROUP_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,
+ NETDATA_SYSCALL_APPS_FILE_OPEN_ERROR,
+ "",
+ "Fails to open files",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_FILE_CGROUP_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ NETDATA_CGROUP_FD_OPEN_ERR_CONTEXT,
+ 20271,
+ em->update_every);
+ }
+
+ ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
+ NETDATA_SYSCALL_APPS_FILE_CLOSED,
+ "",
+ "Files closed",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_FILE_CGROUP_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,
+ NETDATA_SYSCALL_APPS_FILE_CLOSE_ERROR,
+ "",
+ "Fails to close files",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_FILE_CGROUP_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_obsolete_fd_services(em);
+
+ ebpf_cgroup_target_t *ect;
+ for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
+ if (ect->systemd)
+ 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;
+ 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_DIMENSION_CALL,
+ 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_DIMENSION_CALL,
+ 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_DIMENSION_CALL,
+ 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_DIMENSION_CALL,
+ 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);
+ }
+}
+
+/**
+ * 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_DIMENSION_CALL,
+ NETDATA_FILE_GROUP,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NULL,
+ 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_DIMENSION_CALL,
+ NETDATA_FILE_GROUP,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NULL,
+ 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 *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_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);
+
+#ifdef NETDATA_DEV_MODE
+ if (ebpf_aral_fd_pid)
+ ebpf_statistic_obsolete_aral_chart(em, fd_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 (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;
+ }
+}
+
+/**
+ * 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 = ebpf_fd_stat_get();
+ 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.
+ *
+ * @param maps_per_core do I need to read all cores?
+ */
+static void read_fd_apps_table(int maps_per_core)
+{
+ netdata_fd_stat_t *fv = fd_vector;
+ uint32_t key;
+ struct ebpf_pid_stat *pids = ebpf_root_of_pids;
+ 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;
+
+ while (pids) {
+ key = pids->pid;
+
+ if (bpf_map_lookup_elem(fd, &key, fv)) {
+ pids = pids->next;
+ continue;
+ }
+
+ fd_apps_accumulator(fv, maps_per_core);
+
+ 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 collected per PID.
+ *
+ * @param maps_per_core do I need to read all cores?
+ */
+static void ebpf_update_fd_cgroup(int maps_per_core)
+{
+ 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, maps_per_core);
+
+ 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 ebpf_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 ebpf_target *root)
+{
+ struct ebpf_target *w;
+ for (w = root; w; w = w->next) {
+ if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_FD_IDX))))
+ continue;
+
+ ebpf_fd_sum_pids(&w->fd, w->root_pid);
+
+ 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();
+ }
+ }
+}
+
+/**
+ * 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_FD);
+
+ 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_FD);
+ }
+
+ 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_FD);
+
+ 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_FD);
+ }
+}
+
+/**
+ * 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)
+{
+ 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)
+{
+ 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_FD, 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_FD, 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_FD, 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_FD, em->update_every);
+ }
+}
+
+/**
+ * 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;
+ ebpf_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);
+ }
+ }
+ ebpf_write_end_chart();
+
+ if (em->mode < MODE_ENTRY) {
+ ebpf_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);
+ }
+ }
+ ebpf_write_end_chart();
+ }
+
+ ebpf_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);
+ }
+ }
+ ebpf_write_end_chart();
+
+ if (em->mode < MODE_ENTRY) {
+ ebpf_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);
+ }
+ }
+ 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)
+{
+ 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) {
+ 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_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_fd_read_global_tables(stats, maps_per_core);
+ pthread_mutex_lock(&collect_data_mutex);
+ if (apps)
+ read_fd_apps_table(maps_per_core);
+
+ if (cgroups)
+ ebpf_update_fd_cgroup(maps_per_core);
+
+ pthread_mutex_lock(&lock);
+
+#ifdef NETDATA_DEV_MODE
+ if (ebpf_aral_fd_pid)
+ ebpf_send_data_aral_chart(ebpf_aral_fd_pid, em);
+#endif
+
+ 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)
+ ebpf_fd_send_cgroup_data(em);
+
+ 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);
+ }
+}
+
+/*****************************************************************
+ *
+ * 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_DIMENSION_CALL,
+ 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, 1);
+ 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_DIMENSION_CALL,
+ 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, 1);
+ 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_DIMENSION_CALL,
+ 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, 1);
+ 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_DIMENSION_CALL,
+ 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, 1);
+ 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_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);
+ }
+
+ 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.
+ *
+ * @param apps is apps enabled?
+ */
+static void ebpf_fd_allocate_global_vectors(int apps)
+{
+ if (apps) {
+ ebpf_fd_aral_init();
+ 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));
+}
+
+/*
+ * 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)
+{
+ netdata_thread_cleanup_push(ebpf_fd_exit, ptr);
+
+ ebpf_module_t *em = (ebpf_module_t *)ptr;
+ 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(em->apps_charts);
+
+ 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);
+#ifdef NETDATA_DEV_MODE
+ if (ebpf_aral_fd_pid)
+ fd_disable_priority = ebpf_statistic_create_aral_chart(NETDATA_EBPF_FD_ARAL_NAME, em);
+#endif
+
+ pthread_mutex_unlock(&lock);
+
+ fd_collector(em);
+
+endfd:
+ ebpf_update_disabled_plugin_stats(em);
+
+ netdata_thread_cleanup_pop(1);
+ return NULL;
+}