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-rw-r--r--collectors/ebpf.plugin/ebpf_shm.c1327
1 files changed, 1327 insertions, 0 deletions
diff --git a/collectors/ebpf.plugin/ebpf_shm.c b/collectors/ebpf.plugin/ebpf_shm.c
new file mode 100644
index 00000000..f14eb67d
--- /dev/null
+++ b/collectors/ebpf.plugin/ebpf_shm.c
@@ -0,0 +1,1327 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "ebpf.h"
+#include "ebpf_shm.h"
+
+static char *shm_dimension_name[NETDATA_SHM_END] = { "get", "at", "dt", "ctl" };
+static netdata_syscall_stat_t shm_aggregated_data[NETDATA_SHM_END];
+static netdata_publish_syscall_t shm_publish_aggregated[NETDATA_SHM_END];
+
+netdata_publish_shm_t *shm_vector = NULL;
+
+static netdata_idx_t shm_hash_values[NETDATA_SHM_END];
+static netdata_idx_t *shm_values = NULL;
+
+struct config shm_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 ebpf_local_maps_t shm_maps[] = {{.name = "tbl_pid_shm", .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 = "shm_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 = "tbl_shm", .internal_input = NETDATA_SHM_END,
+ .user_input = 0,
+ .type = NETDATA_EBPF_MAP_STATIC,
+ .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED,
+#ifdef LIBBPF_MAJOR_VERSION
+ .map_type = BPF_MAP_TYPE_PERCPU_ARRAY
+#endif
+ },
+ {.name = NULL, .internal_input = 0, .user_input = 0}};
+
+netdata_ebpf_targets_t shm_targets[] = { {.name = "shmget", .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = "shmat", .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = "shmdt", .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = "shmctl", .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}};
+
+#ifdef NETDATA_DEV_MODE
+int shm_disable_priority;
+#endif
+
+#ifdef LIBBPF_MAJOR_VERSION
+/*****************************************************************
+ *
+ * BTF FUNCTIONS
+ *
+ *****************************************************************/
+
+/*
+ * Disable tracepoint
+ *
+ * Disable all tracepoints to use exclusively another method.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static void ebpf_shm_disable_tracepoint(struct shm_bpf *obj)
+{
+ bpf_program__set_autoload(obj->progs.netdata_syscall_shmget, false);
+ bpf_program__set_autoload(obj->progs.netdata_syscall_shmat, false);
+ bpf_program__set_autoload(obj->progs.netdata_syscall_shmdt, false);
+ bpf_program__set_autoload(obj->progs.netdata_syscall_shmctl, false);
+}
+
+/*
+ * Disable probe
+ *
+ * Disable all probes to use exclusively another method.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static void ebpf_disable_probe(struct shm_bpf *obj)
+{
+ bpf_program__set_autoload(obj->progs.netdata_shmget_probe, false);
+ bpf_program__set_autoload(obj->progs.netdata_shmat_probe, false);
+ bpf_program__set_autoload(obj->progs.netdata_shmdt_probe, false);
+ bpf_program__set_autoload(obj->progs.netdata_shmctl_probe, false);
+ bpf_program__set_autoload(obj->progs.netdata_shm_release_task_probe, false);
+}
+
+/*
+ * Disable trampoline
+ *
+ * Disable all trampoline to use exclusively another method.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static void ebpf_disable_trampoline(struct shm_bpf *obj)
+{
+ bpf_program__set_autoload(obj->progs.netdata_shmget_fentry, false);
+ bpf_program__set_autoload(obj->progs.netdata_shmat_fentry, false);
+ bpf_program__set_autoload(obj->progs.netdata_shmdt_fentry, false);
+ bpf_program__set_autoload(obj->progs.netdata_shmctl_fentry, false);
+ bpf_program__set_autoload(obj->progs.netdata_shm_release_task_fentry, false);
+}
+
+/**
+ * Set trampoline target
+ *
+ * Set the targets we will monitor.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static void ebpf_set_trampoline_target(struct shm_bpf *obj)
+{
+ char syscall[NETDATA_EBPF_MAX_SYSCALL_LENGTH + 1];
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMGET_CALL].name, running_on_kernel);
+
+ bpf_program__set_attach_target(obj->progs.netdata_shmget_fentry, 0,
+ syscall);
+
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMAT_CALL].name, running_on_kernel);
+ bpf_program__set_attach_target(obj->progs.netdata_shmat_fentry, 0,
+ syscall);
+
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMDT_CALL].name, running_on_kernel);
+ bpf_program__set_attach_target(obj->progs.netdata_shmdt_fentry, 0,
+ syscall);
+
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMCTL_CALL].name, running_on_kernel);
+ bpf_program__set_attach_target(obj->progs.netdata_shmctl_fentry, 0,
+ syscall);
+
+ bpf_program__set_attach_target(obj->progs.netdata_shm_release_task_fentry, 0,
+ EBPF_COMMON_FNCT_CLEAN_UP);
+}
+
+/**
+ * SHM 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_shm_attach_probe(struct shm_bpf *obj)
+{
+ char syscall[NETDATA_EBPF_MAX_SYSCALL_LENGTH + 1];
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMGET_CALL].name, running_on_kernel);
+
+ obj->links.netdata_shmget_probe = bpf_program__attach_kprobe(obj->progs.netdata_shmget_probe,
+ false, syscall);
+ int ret = (int)libbpf_get_error(obj->links.netdata_shmget_probe);
+ if (ret)
+ return -1;
+
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMAT_CALL].name, running_on_kernel);
+ obj->links.netdata_shmat_probe = bpf_program__attach_kprobe(obj->progs.netdata_shmat_probe,
+ false, syscall);
+ ret = (int)libbpf_get_error(obj->links.netdata_shmat_probe);
+ if (ret)
+ return -1;
+
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMDT_CALL].name, running_on_kernel);
+ obj->links.netdata_shmdt_probe = bpf_program__attach_kprobe(obj->progs.netdata_shmdt_probe,
+ false, syscall);
+ ret = (int)libbpf_get_error(obj->links.netdata_shmdt_probe);
+ if (ret)
+ return -1;
+
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH,
+ shm_targets[NETDATA_KEY_SHMCTL_CALL].name, running_on_kernel);
+ obj->links.netdata_shmctl_probe = bpf_program__attach_kprobe(obj->progs.netdata_shmctl_probe,
+ false, syscall);
+ ret = (int)libbpf_get_error(obj->links.netdata_shmctl_probe);
+ if (ret)
+ return -1;
+
+ obj->links.netdata_shm_release_task_probe = bpf_program__attach_kprobe(obj->progs.netdata_shm_release_task_probe,
+ false, EBPF_COMMON_FNCT_CLEAN_UP);
+ ret = (int)libbpf_get_error(obj->links.netdata_shm_release_task_probe);
+ if (ret)
+ return -1;
+
+
+ return 0;
+}
+
+/**
+ * Set hash tables
+ *
+ * Set the values for maps according the value given by kernel.
+ */
+static void ebpf_shm_set_hash_tables(struct shm_bpf *obj)
+{
+ shm_maps[NETDATA_PID_SHM_TABLE].map_fd = bpf_map__fd(obj->maps.tbl_pid_shm);
+ shm_maps[NETDATA_SHM_CONTROLLER].map_fd = bpf_map__fd(obj->maps.shm_ctrl);
+ shm_maps[NETDATA_SHM_GLOBAL_TABLE].map_fd = bpf_map__fd(obj->maps.tbl_shm);
+}
+
+/**
+ * Disable Release Task
+ *
+ * Disable release task when apps is not enabled.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static void ebpf_shm_disable_release_task(struct shm_bpf *obj)
+{
+ bpf_program__set_autoload(obj->progs.netdata_shm_release_task_probe, false);
+ bpf_program__set_autoload(obj->progs.netdata_shm_release_task_fentry, false);
+}
+
+/**
+ * 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_shm_adjust_map(struct shm_bpf *obj, ebpf_module_t *em)
+{
+ ebpf_update_map_size(obj->maps.tbl_pid_shm, &shm_maps[NETDATA_PID_SHM_TABLE],
+ em, bpf_map__name(obj->maps.tbl_pid_shm));
+
+ ebpf_update_map_type(obj->maps.tbl_shm, &shm_maps[NETDATA_SHM_GLOBAL_TABLE]);
+ ebpf_update_map_type(obj->maps.tbl_pid_shm, &shm_maps[NETDATA_PID_SHM_TABLE]);
+ ebpf_update_map_type(obj->maps.shm_ctrl, &shm_maps[NETDATA_SHM_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_shm_load_and_attach(struct shm_bpf *obj, ebpf_module_t *em)
+{
+ netdata_ebpf_targets_t *shmt = em->targets;
+ netdata_ebpf_program_loaded_t test = shmt[NETDATA_KEY_SHMGET_CALL].mode;
+
+ // We are testing only one, because all will have the same behavior
+ if (test == EBPF_LOAD_TRAMPOLINE ) {
+ ebpf_shm_disable_tracepoint(obj);
+ ebpf_disable_probe(obj);
+
+ ebpf_set_trampoline_target(obj);
+ } else if (test == EBPF_LOAD_PROBE || test == EBPF_LOAD_RETPROBE ) {
+ ebpf_shm_disable_tracepoint(obj);
+ ebpf_disable_trampoline(obj);
+ } else {
+ ebpf_disable_probe(obj);
+ ebpf_disable_trampoline(obj);
+ }
+
+ ebpf_shm_adjust_map(obj, em);
+ if (!em->apps_charts && !em->cgroup_charts)
+ ebpf_shm_disable_release_task(obj);
+
+ int ret = shm_bpf__load(obj);
+ if (!ret) {
+ if (test != EBPF_LOAD_PROBE && test != EBPF_LOAD_RETPROBE)
+ shm_bpf__attach(obj);
+ else
+ ret = ebpf_shm_attach_probe(obj);
+
+ if (!ret)
+ ebpf_shm_set_hash_tables(obj);
+ }
+
+ return ret;
+}
+#endif
+/*****************************************************************
+ * FUNCTIONS TO CLOSE THE THREAD
+ *****************************************************************/
+
+static void ebpf_obsolete_specific_shm_charts(char *type, int update_every);
+
+/**
+ * Obsolete services
+ *
+ * Obsolete all service charts created
+ *
+ * @param em a pointer to `struct ebpf_module`
+ */
+static void ebpf_obsolete_shm_services(ebpf_module_t *em)
+{
+ ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
+ NETDATA_SHMGET_CHART,
+ "",
+ "Calls to syscall shmget(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ NULL,
+ 20191,
+ em->update_every);
+
+ ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
+ NETDATA_SHMAT_CHART,
+ "",
+ "Calls to syscall shmat(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ NULL,
+ 20192,
+ em->update_every);
+
+ ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
+ NETDATA_SHMDT_CHART,
+ "",
+ "Calls to syscall shmdt(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ NULL,
+ 20193,
+ em->update_every);
+
+ ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
+ NETDATA_SHMCTL_CHART,
+ "",
+ "Calls to syscall shmctl(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ NULL,
+ 20193,
+ 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_shm_cgroup_charts(ebpf_module_t *em) {
+ pthread_mutex_lock(&mutex_cgroup_shm);
+
+ ebpf_obsolete_shm_services(em);
+
+ ebpf_cgroup_target_t *ect;
+ for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
+ if (ect->systemd)
+ continue;
+
+ ebpf_obsolete_specific_shm_charts(ect->name, em->update_every);
+ }
+ pthread_mutex_unlock(&mutex_cgroup_shm);
+}
+
+/**
+ * Obsolette apps charts
+ *
+ * Obsolete apps charts.
+ *
+ * @param em a pointer to the structure with the default values.
+ */
+void ebpf_obsolete_shm_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_SHM_IDX))))
+ continue;
+
+ ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
+ w->clean_name,
+ "_ebpf_shmget_call",
+ "Calls to syscall shmget(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmget_call",
+ 20191,
+ update_every);
+
+ ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
+ w->clean_name,
+ "_ebpf_shmat_call",
+ "Calls to syscall shmat(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmat_call",
+ 20192,
+ update_every);
+
+ ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
+ w->clean_name,
+ "_ebpf_shmdt_call",
+ "Calls to syscall shmdt(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmdt_call",
+ 20193,
+ update_every);
+
+ ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
+ w->clean_name,
+ "_ebpf_shmctl_call",
+ "Calls to syscall shmctl(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmctl_call",
+ 20194,
+ update_every);
+
+ w->charts_created &= ~(1<<EBPF_MODULE_SHM_IDX);
+ }
+}
+
+/**
+ * Obsolete global
+ *
+ * Obsolete global charts created by thread.
+ *
+ * @param em a pointer to `struct ebpf_module`
+ */
+static void ebpf_obsolete_shm_global(ebpf_module_t *em)
+{
+ ebpf_write_chart_obsolete(NETDATA_EBPF_SYSTEM_GROUP,
+ NETDATA_SHM_GLOBAL_CHART,
+ "",
+ "Calls to shared memory system calls",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_SYSTEM_IPC_SHM_SUBMENU,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NULL,
+ NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_CALLS,
+ em->update_every);
+}
+
+/**
+ * SHM Exit
+ *
+ * Cancel child thread.
+ *
+ * @param ptr thread data.
+ */
+static void ebpf_shm_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_shm_cgroup_charts(em);
+ fflush(stdout);
+ }
+
+ if (em->apps_charts & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) {
+ ebpf_obsolete_shm_apps_charts(em);
+ }
+
+ ebpf_obsolete_shm_global(em);
+
+#ifdef NETDATA_DEV_MODE
+ if (ebpf_aral_shm_pid)
+ ebpf_statistic_obsolete_aral_chart(em, shm_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 (shm_bpf_obj) {
+ shm_bpf__destroy(shm_bpf_obj);
+ shm_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);
+}
+
+/*****************************************************************
+ * COLLECTOR THREAD
+ *****************************************************************/
+
+/**
+ * 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 shm_apps_accumulator(netdata_publish_shm_t *out, int maps_per_core)
+{
+ int i, end = (maps_per_core) ? ebpf_nprocs : 1;
+ netdata_publish_shm_t *total = &out[0];
+ for (i = 1; i < end; i++) {
+ netdata_publish_shm_t *w = &out[i];
+ total->get += w->get;
+ total->at += w->at;
+ total->dt += w->dt;
+ total->ctl += w->ctl;
+ }
+}
+
+/**
+ * Fill PID
+ *
+ * Fill PID structures
+ *
+ * @param current_pid pid that we are collecting data
+ * @param out values read from hash tables;
+ */
+static void shm_fill_pid(uint32_t current_pid, netdata_publish_shm_t *publish)
+{
+ netdata_publish_shm_t *curr = shm_pid[current_pid];
+ if (!curr) {
+ curr = ebpf_shm_stat_get( );
+ shm_pid[current_pid] = curr;
+ }
+
+ memcpy(curr, publish, sizeof(netdata_publish_shm_t));
+}
+
+/**
+ * Update cgroup
+ *
+ * Update cgroup data based in
+ *
+ * @param maps_per_core do I need to read all cores?
+ */
+static void ebpf_update_shm_cgroup(int maps_per_core)
+{
+ netdata_publish_shm_t *cv = shm_vector;
+ int fd = shm_maps[NETDATA_PID_SHM_TABLE].map_fd;
+ size_t length = sizeof(netdata_publish_shm_t);
+ if (maps_per_core)
+ length *= ebpf_nprocs;
+
+ ebpf_cgroup_target_t *ect;
+
+ memset(cv, 0, length);
+
+ 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_publish_shm_t *out = &pids->shm;
+ if (likely(shm_pid) && shm_pid[pid]) {
+ netdata_publish_shm_t *in = shm_pid[pid];
+
+ memcpy(out, in, sizeof(netdata_publish_shm_t));
+ } else {
+ if (!bpf_map_lookup_elem(fd, &pid, cv)) {
+ shm_apps_accumulator(cv, maps_per_core);
+
+ memcpy(out, cv, sizeof(netdata_publish_shm_t));
+
+ // now that we've consumed the value, zero it out in the map.
+ memset(cv, 0, length);
+ bpf_map_update_elem(fd, &pid, cv, BPF_EXIST);
+ }
+ }
+ }
+ }
+ pthread_mutex_unlock(&mutex_cgroup_shm);
+}
+
+/**
+ * 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_shm_apps_table(int maps_per_core)
+{
+ netdata_publish_shm_t *cv = shm_vector;
+ uint32_t key;
+ struct ebpf_pid_stat *pids = ebpf_root_of_pids;
+ int fd = shm_maps[NETDATA_PID_SHM_TABLE].map_fd;
+ size_t length = sizeof(netdata_publish_shm_t);
+ if (maps_per_core)
+ length *= ebpf_nprocs;
+
+ while (pids) {
+ key = pids->pid;
+
+ if (bpf_map_lookup_elem(fd, &key, cv)) {
+ pids = pids->next;
+ continue;
+ }
+
+ shm_apps_accumulator(cv, maps_per_core);
+
+ shm_fill_pid(key, cv);
+
+ // now that we've consumed the value, zero it out in the map.
+ memset(cv, 0, length);
+ bpf_map_update_elem(fd, &key, cv, BPF_EXIST);
+
+ pids = pids->next;
+ }
+}
+
+/**
+* Send global charts to netdata agent.
+*/
+static void shm_send_global()
+{
+ ebpf_write_begin_chart(NETDATA_EBPF_SYSTEM_GROUP, NETDATA_SHM_GLOBAL_CHART, "");
+ write_chart_dimension(
+ shm_publish_aggregated[NETDATA_KEY_SHMGET_CALL].dimension,
+ (long long) shm_hash_values[NETDATA_KEY_SHMGET_CALL]
+ );
+ write_chart_dimension(
+ shm_publish_aggregated[NETDATA_KEY_SHMAT_CALL].dimension,
+ (long long) shm_hash_values[NETDATA_KEY_SHMAT_CALL]
+ );
+ write_chart_dimension(
+ shm_publish_aggregated[NETDATA_KEY_SHMDT_CALL].dimension,
+ (long long) shm_hash_values[NETDATA_KEY_SHMDT_CALL]
+ );
+ write_chart_dimension(
+ shm_publish_aggregated[NETDATA_KEY_SHMCTL_CALL].dimension,
+ (long long) shm_hash_values[NETDATA_KEY_SHMCTL_CALL]
+ );
+ ebpf_write_end_chart();
+}
+
+/**
+ * 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_shm_read_global_table(netdata_idx_t *stats, int maps_per_core)
+{
+ ebpf_read_global_table_stats(shm_hash_values,
+ shm_values,
+ shm_maps[NETDATA_SHM_GLOBAL_TABLE].map_fd,
+ maps_per_core,
+ NETDATA_KEY_SHMGET_CALL,
+ NETDATA_SHM_END);
+
+ ebpf_read_global_table_stats(stats,
+ shm_values,
+ shm_maps[NETDATA_SHM_CONTROLLER].map_fd,
+ maps_per_core,
+ NETDATA_CONTROLLER_PID_TABLE_ADD,
+ NETDATA_CONTROLLER_END);
+}
+
+/**
+ * Sum values for all targets.
+ */
+static void ebpf_shm_sum_pids(netdata_publish_shm_t *shm, struct ebpf_pid_on_target *root)
+{
+ while (root) {
+ int32_t pid = root->pid;
+ netdata_publish_shm_t *w = shm_pid[pid];
+ if (w) {
+ shm->get += w->get;
+ shm->at += w->at;
+ shm->dt += w->dt;
+ shm->ctl += w->ctl;
+
+ // reset for next collection.
+ w->get = 0;
+ w->at = 0;
+ w->dt = 0;
+ w->ctl = 0;
+ }
+ root = root->next;
+ }
+}
+
+/**
+ * Send data to Netdata calling auxiliary functions.
+ *
+ * @param root the target list.
+*/
+void ebpf_shm_send_apps_data(struct ebpf_target *root)
+{
+ struct ebpf_target *w;
+ for (w = root; w; w = w->next) {
+ if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_SHM_IDX))))
+ continue;
+
+ ebpf_shm_sum_pids(&w->shm, w->root_pid);
+
+ ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_shmget_call");
+ write_chart_dimension("calls", (long long) w->shm.get);
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_shmat_call");
+ write_chart_dimension("calls", (long long) w->shm.at);
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_shmdt_call");
+ write_chart_dimension("calls", (long long) w->shm.dt);
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_shmctl_call");
+ write_chart_dimension("calls", (long long) w->shm.ctl);
+ ebpf_write_end_chart();
+ }
+}
+
+/**
+ * Sum values for all targets.
+ */
+static void ebpf_shm_sum_cgroup_pids(netdata_publish_shm_t *shm, struct pid_on_target2 *root)
+{
+ netdata_publish_shm_t shmv;
+ memset(&shmv, 0, sizeof(shmv));
+ while (root) {
+ netdata_publish_shm_t *w = &root->shm;
+ shmv.get += w->get;
+ shmv.at += w->at;
+ shmv.dt += w->dt;
+ shmv.ctl += w->ctl;
+
+ root = root->next;
+ }
+
+ memcpy(shm, &shmv, sizeof(shmv));
+}
+
+/**
+ * Create specific shared memory charts
+ *
+ * Create charts for cgroup/application.
+ *
+ * @param type the chart type.
+ * @param update_every value to overwrite the update frequency set by the server.
+ */
+static void ebpf_create_specific_shm_charts(char *type, int update_every)
+{
+ ebpf_create_chart(type, NETDATA_SHMGET_CHART,
+ "Calls to syscall shmget(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_CGROUP_SHM_GET_CONTEXT,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5800,
+ ebpf_create_global_dimension,
+ &shm_publish_aggregated[NETDATA_KEY_SHMGET_CALL],
+ 1,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+
+ ebpf_create_chart(type, NETDATA_SHMAT_CHART,
+ "Calls to syscall shmat(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_CGROUP_SHM_AT_CONTEXT,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5801,
+ ebpf_create_global_dimension,
+ &shm_publish_aggregated[NETDATA_KEY_SHMAT_CALL],
+ 1,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+
+ ebpf_create_chart(type, NETDATA_SHMDT_CHART,
+ "Calls to syscall shmdt(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_CGROUP_SHM_DT_CONTEXT,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5802,
+ ebpf_create_global_dimension,
+ &shm_publish_aggregated[NETDATA_KEY_SHMDT_CALL],
+ 1,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+
+ ebpf_create_chart(type, NETDATA_SHMCTL_CHART,
+ "Calls to syscall shmctl(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_CGROUP_SHM_CTL_CONTEXT,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5803,
+ ebpf_create_global_dimension,
+ &shm_publish_aggregated[NETDATA_KEY_SHMCTL_CALL],
+ 1,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+}
+
+/**
+ * Obsolete specific shared memory charts
+ *
+ * Obsolete charts for cgroup/application.
+ *
+ * @param type the chart type.
+ * @param update_every value to overwrite the update frequency set by the server.
+ */
+static void ebpf_obsolete_specific_shm_charts(char *type, int update_every)
+{
+ ebpf_write_chart_obsolete(type, NETDATA_SHMGET_CHART,
+ "",
+ "Calls to syscall shmget(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_SHM_GET_CONTEXT,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5800, update_every);
+
+ ebpf_write_chart_obsolete(type, NETDATA_SHMAT_CHART,
+ "",
+ "Calls to syscall shmat(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_SHM_AT_CONTEXT,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5801, update_every);
+
+ ebpf_write_chart_obsolete(type, NETDATA_SHMDT_CHART,
+ "",
+ "Calls to syscall shmdt(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_SHM_DT_CONTEXT,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5802, update_every);
+
+ ebpf_write_chart_obsolete(type, NETDATA_SHMCTL_CHART,
+ "",
+ "Calls to syscall shmctl(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_SHM_CTL_CONTEXT,
+ NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5803, update_every);
+}
+
+/**
+ * Create Systemd Swap Charts
+ *
+ * Create charts when systemd is enabled
+ *
+ * @param update_every value to overwrite the update frequency set by the server.
+ **/
+static void ebpf_create_systemd_shm_charts(int update_every)
+{
+ ebpf_create_charts_on_systemd(NETDATA_SHMGET_CHART,
+ "Calls to syscall shmget(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ 20191,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ NETDATA_SYSTEMD_SHM_GET_CONTEXT, NETDATA_EBPF_MODULE_NAME_SHM, update_every);
+
+ ebpf_create_charts_on_systemd(NETDATA_SHMAT_CHART,
+ "Calls to syscall shmat(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ 20192,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ NETDATA_SYSTEMD_SHM_AT_CONTEXT, NETDATA_EBPF_MODULE_NAME_SHM, update_every);
+
+ ebpf_create_charts_on_systemd(NETDATA_SHMDT_CHART,
+ "Calls to syscall shmdt(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ 20193,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ NETDATA_SYSTEMD_SHM_DT_CONTEXT, NETDATA_EBPF_MODULE_NAME_SHM, update_every);
+
+ ebpf_create_charts_on_systemd(NETDATA_SHMCTL_CHART,
+ "Calls to syscall shmctl(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ 20193,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ NETDATA_SYSTEMD_SHM_CTL_CONTEXT, NETDATA_EBPF_MODULE_NAME_SHM, update_every);
+}
+
+/**
+ * Send Systemd charts
+ *
+ * Send collected data to Netdata.
+ */
+static void ebpf_send_systemd_shm_charts()
+{
+ ebpf_cgroup_target_t *ect;
+ ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SHMGET_CHART, "");
+ for (ect = ebpf_cgroup_pids; ect; ect = ect->next) {
+ if (unlikely(ect->systemd) && unlikely(ect->updated)) {
+ write_chart_dimension(ect->name, (long long)ect->publish_shm.get);
+ }
+ }
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SHMAT_CHART, "");
+ for (ect = ebpf_cgroup_pids; ect; ect = ect->next) {
+ if (unlikely(ect->systemd) && unlikely(ect->updated)) {
+ write_chart_dimension(ect->name, (long long)ect->publish_shm.at);
+ }
+ }
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SHMDT_CHART, "");
+ for (ect = ebpf_cgroup_pids; ect; ect = ect->next) {
+ if (unlikely(ect->systemd) && unlikely(ect->updated)) {
+ write_chart_dimension(ect->name, (long long)ect->publish_shm.dt);
+ }
+ }
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SHMCTL_CHART, "");
+ for (ect = ebpf_cgroup_pids; ect; ect = ect->next) {
+ if (unlikely(ect->systemd) && unlikely(ect->updated)) {
+ write_chart_dimension(ect->name, (long long)ect->publish_shm.ctl);
+ }
+ }
+ ebpf_write_end_chart();
+}
+
+/*
+ * Send Specific Shared memory 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_shm_data(char *type, netdata_publish_shm_t *values)
+{
+ ebpf_write_begin_chart(type, NETDATA_SHMGET_CHART, "");
+ write_chart_dimension(shm_publish_aggregated[NETDATA_KEY_SHMGET_CALL].name, (long long)values->get);
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(type, NETDATA_SHMAT_CHART, "");
+ write_chart_dimension(shm_publish_aggregated[NETDATA_KEY_SHMAT_CALL].name, (long long)values->at);
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(type, NETDATA_SHMDT_CHART, "");
+ write_chart_dimension(shm_publish_aggregated[NETDATA_KEY_SHMDT_CALL].name, (long long)values->dt);
+ ebpf_write_end_chart();
+
+ ebpf_write_begin_chart(type, NETDATA_SHMCTL_CHART, "");
+ write_chart_dimension(shm_publish_aggregated[NETDATA_KEY_SHMCTL_CALL].name, (long long)values->ctl);
+ ebpf_write_end_chart();
+}
+
+/**
+ * Send data to Netdata calling auxiliary functions.
+ *
+ * @param update_every value to overwrite the update frequency set by the server.
+*/
+void ebpf_shm_send_cgroup_data(int update_every)
+{
+ 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_shm_sum_cgroup_pids(&ect->publish_shm, ect->pids);
+ }
+
+ int has_systemd = shm_ebpf_cgroup.header->systemd_enabled;
+ if (has_systemd) {
+ if (send_cgroup_chart) {
+ ebpf_create_systemd_shm_charts(update_every);
+ }
+
+ ebpf_send_systemd_shm_charts();
+ }
+
+ for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
+ if (ect->systemd)
+ continue;
+
+ if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_SHM_CHART) && ect->updated) {
+ ebpf_create_specific_shm_charts(ect->name, update_every);
+ ect->flags |= NETDATA_EBPF_CGROUP_HAS_SHM_CHART;
+ }
+
+ if (ect->flags & NETDATA_EBPF_CGROUP_HAS_SHM_CHART) {
+ if (ect->updated) {
+ ebpf_send_specific_shm_data(ect->name, &ect->publish_shm);
+ } else {
+ ebpf_obsolete_specific_shm_charts(ect->name, update_every);
+ ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_SWAP_CHART;
+ }
+ }
+ }
+
+ pthread_mutex_unlock(&mutex_cgroup_shm);
+}
+
+/**
+* Main loop for this collector.
+*/
+static void shm_collector(ebpf_module_t *em)
+{
+ int cgroups = em->cgroup_charts;
+ int update_every = em->update_every;
+ heartbeat_t hb;
+ heartbeat_init(&hb);
+ int counter = update_every - 1;
+ int maps_per_core = em->maps_per_core;
+ uint32_t running_time = 0;
+ uint32_t lifetime = em->lifetime;
+ netdata_idx_t *stats = em->hash_table_stats;
+ memset(stats, 0, sizeof(em->hash_table_stats));
+ while (!ebpf_plugin_exit && running_time < lifetime) {
+ (void)heartbeat_next(&hb, USEC_PER_SEC);
+ if (ebpf_plugin_exit || ++counter != update_every)
+ continue;
+
+ counter = 0;
+ netdata_apps_integration_flags_t apps = em->apps_charts;
+ ebpf_shm_read_global_table(stats, maps_per_core);
+ pthread_mutex_lock(&collect_data_mutex);
+ if (apps) {
+ read_shm_apps_table(maps_per_core);
+ }
+
+ if (cgroups) {
+ ebpf_update_shm_cgroup(maps_per_core);
+ }
+
+ pthread_mutex_lock(&lock);
+
+ shm_send_global();
+
+ if (apps & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) {
+ ebpf_shm_send_apps_data(apps_groups_root_target);
+ }
+
+#ifdef NETDATA_DEV_MODE
+ if (ebpf_aral_shm_pid)
+ ebpf_send_data_aral_chart(ebpf_aral_shm_pid, em);
+#endif
+
+ if (cgroups) {
+ ebpf_shm_send_cgroup_data(update_every);
+ }
+
+ pthread_mutex_unlock(&lock);
+ pthread_mutex_unlock(&collect_data_mutex);
+
+ pthread_mutex_lock(&ebpf_exit_cleanup);
+ if (running_time && !em->running_time)
+ running_time = update_every;
+ else
+ running_time += update_every;
+
+ em->running_time = running_time;
+ pthread_mutex_unlock(&ebpf_exit_cleanup);
+ }
+}
+
+/*****************************************************************
+ * INITIALIZE THREAD
+ *****************************************************************/
+
+/**
+ * Create 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_shm_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_shmget_call",
+ "Calls to syscall shmget(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmget_call",
+ 20191,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+ 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_shmat_call",
+ "Calls to syscall shmat(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmat_call",
+ 20192,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+ 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_shmdt_call",
+ "Calls to syscall shmdt(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmdt_call",
+ 20193,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+ 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_shmctl_call",
+ "Calls to syscall shmctl(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_IPC_SHM_GROUP,
+ NETDATA_EBPF_CHART_TYPE_STACKED,
+ "app.ebpf_shmctl_call",
+ 20194,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SHM);
+ 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_SHM_IDX;
+ }
+
+ em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED;
+}
+
+/**
+ * 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_shm_allocate_global_vectors(int apps)
+{
+ if (apps) {
+ ebpf_shm_aral_init();
+ shm_pid = callocz((size_t)pid_max, sizeof(netdata_publish_shm_t *));
+ shm_vector = callocz((size_t)ebpf_nprocs, sizeof(netdata_publish_shm_t));
+ }
+
+ shm_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_idx_t));
+
+ memset(shm_hash_values, 0, sizeof(shm_hash_values));
+}
+
+/*****************************************************************
+ * MAIN THREAD
+ *****************************************************************/
+
+/**
+ * Create global charts
+ *
+ * Call ebpf_create_chart to create the charts for the collector.
+ *
+ * @param update_every value to overwrite the update frequency set by the server.
+ */
+static void ebpf_create_shm_charts(int update_every)
+{
+ ebpf_create_chart(
+ NETDATA_EBPF_SYSTEM_GROUP,
+ NETDATA_SHM_GLOBAL_CHART,
+ "Calls to shared memory system calls",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_SYSTEM_IPC_SHM_SUBMENU,
+ NULL,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_CALLS,
+ ebpf_create_global_dimension,
+ shm_publish_aggregated,
+ NETDATA_SHM_END,
+ update_every, NETDATA_EBPF_MODULE_NAME_SHM
+ );
+
+ fflush(stdout);
+}
+
+/*
+ * Load BPF
+ *
+ * Load BPF files.
+ *
+ * @param em the structure with configuration
+ */
+static int ebpf_shm_load_bpf(ebpf_module_t *em)
+{
+#ifdef LIBBPF_MAJOR_VERSION
+ ebpf_define_map_type(em->maps, em->maps_per_core, running_on_kernel);
+#endif
+
+ int ret = 0;
+
+ ebpf_adjust_apps_cgroup(em, em->targets[NETDATA_KEY_SHMGET_CALL].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 {
+ shm_bpf_obj = shm_bpf__open();
+ if (!shm_bpf_obj)
+ ret = -1;
+ else
+ ret = ebpf_shm_load_and_attach(shm_bpf_obj, em);
+ }
+#endif
+
+
+ if (ret)
+ netdata_log_error("%s %s", EBPF_DEFAULT_ERROR_MSG, em->info.thread_name);
+
+ return ret;
+}
+
+/**
+ * Shared memory thread.
+ *
+ * @param ptr a pointer to `struct ebpf_module`
+ * @return It always return NULL
+ */
+void *ebpf_shm_thread(void *ptr)
+{
+ netdata_thread_cleanup_push(ebpf_shm_exit, ptr);
+
+ ebpf_module_t *em = (ebpf_module_t *)ptr;
+ em->maps = shm_maps;
+
+ ebpf_update_pid_table(&shm_maps[NETDATA_PID_SHM_TABLE], em);
+
+#ifdef LIBBPF_MAJOR_VERSION
+ ebpf_adjust_thread_load(em, default_btf);
+#endif
+ if (ebpf_shm_load_bpf(em)) {
+ goto endshm;
+ }
+
+ ebpf_shm_allocate_global_vectors(em->apps_charts);
+
+ int algorithms[NETDATA_SHM_END] = {
+ NETDATA_EBPF_INCREMENTAL_IDX,
+ NETDATA_EBPF_INCREMENTAL_IDX,
+ NETDATA_EBPF_INCREMENTAL_IDX,
+ NETDATA_EBPF_INCREMENTAL_IDX
+ };
+ ebpf_global_labels(
+ shm_aggregated_data,
+ shm_publish_aggregated,
+ shm_dimension_name,
+ shm_dimension_name,
+ algorithms,
+ NETDATA_SHM_END
+ );
+
+ pthread_mutex_lock(&lock);
+ ebpf_create_shm_charts(em->update_every);
+ ebpf_update_stats(&plugin_statistics, em);
+ ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_ADD);
+#ifdef NETDATA_DEV_MODE
+ if (ebpf_aral_shm_pid)
+ shm_disable_priority = ebpf_statistic_create_aral_chart(NETDATA_EBPF_SHM_ARAL_NAME, em);
+#endif
+
+ pthread_mutex_unlock(&lock);
+
+ shm_collector(em);
+
+endshm:
+ ebpf_update_disabled_plugin_stats(em);
+
+ netdata_thread_cleanup_pop(1);
+ return NULL;
+}