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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 12:08:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 12:08:18 +0000
commit5da14042f70711ea5cf66e034699730335462f66 (patch)
tree0f6354ccac934ed87a2d555f45be4c831cf92f4a /src/collectors/ebpf.plugin/ebpf_sync.c
parentReleasing debian version 1.44.3-2. (diff)
downloadnetdata-5da14042f70711ea5cf66e034699730335462f66.tar.xz
netdata-5da14042f70711ea5cf66e034699730335462f66.zip
Merging upstream version 1.45.3+dfsg.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/collectors/ebpf.plugin/ebpf_sync.c')
-rw-r--r--src/collectors/ebpf.plugin/ebpf_sync.c739
1 files changed, 739 insertions, 0 deletions
diff --git a/src/collectors/ebpf.plugin/ebpf_sync.c b/src/collectors/ebpf.plugin/ebpf_sync.c
new file mode 100644
index 000000000..a16318107
--- /dev/null
+++ b/src/collectors/ebpf.plugin/ebpf_sync.c
@@ -0,0 +1,739 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "ebpf.h"
+#include "ebpf_sync.h"
+
+static char *sync_counter_dimension_name[NETDATA_SYNC_IDX_END] = { "sync", "syncfs", "msync", "fsync", "fdatasync",
+ "sync_file_range" };
+static netdata_syscall_stat_t sync_counter_aggregated_data[NETDATA_SYNC_IDX_END];
+static netdata_publish_syscall_t sync_counter_publish_aggregated[NETDATA_SYNC_IDX_END];
+
+static netdata_idx_t sync_hash_values[NETDATA_SYNC_IDX_END];
+
+ebpf_local_maps_t sync_maps[] = {{.name = "tbl_sync", .internal_input = NETDATA_SYNC_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,
+ .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
+ }};
+
+ebpf_local_maps_t syncfs_maps[] = {{.name = "tbl_syncfs", .internal_input = NETDATA_SYNC_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,
+ .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
+ }};
+
+ebpf_local_maps_t msync_maps[] = {{.name = "tbl_msync", .internal_input = NETDATA_SYNC_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,
+ .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
+ }};
+
+ebpf_local_maps_t fsync_maps[] = {{.name = "tbl_fsync", .internal_input = NETDATA_SYNC_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,
+ .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
+ }};
+
+ebpf_local_maps_t fdatasync_maps[] = {{.name = "tbl_fdatasync", .internal_input = NETDATA_SYNC_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,
+ .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
+ }};
+
+ebpf_local_maps_t sync_file_range_maps[] = {{.name = "tbl_syncfr", .internal_input = NETDATA_SYNC_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,
+ .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 sync_config = { .first_section = NULL,
+ .last_section = NULL,
+ .mutex = NETDATA_MUTEX_INITIALIZER,
+ .index = { .avl_tree = { .root = NULL, .compar = appconfig_section_compare },
+ .rwlock = AVL_LOCK_INITIALIZER } };
+
+netdata_ebpf_targets_t sync_targets[] = { {.name = NETDATA_SYSCALLS_SYNC, .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = NETDATA_SYSCALLS_SYNCFS, .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = NETDATA_SYSCALLS_MSYNC, .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = NETDATA_SYSCALLS_FSYNC, .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = NETDATA_SYSCALLS_FDATASYNC, .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = NETDATA_SYSCALLS_SYNC_FILE_RANGE, .mode = EBPF_LOAD_TRAMPOLINE},
+ {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}};
+
+#ifdef LIBBPF_MAJOR_VERSION
+/*****************************************************************
+ *
+ * BTF FUNCTIONS
+ *
+ *****************************************************************/
+
+/**
+ * Disable probe
+ *
+ * Disable kprobe to use another method.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static inline void ebpf_sync_disable_probe(struct sync_bpf *obj)
+{
+ bpf_program__set_autoload(obj->progs.netdata_sync_kprobe, false);
+}
+
+/**
+ * Disable trampoline
+ *
+ * Disable trampoline to use another method.
+ *
+ * @param obj is the main structure for bpf objects.
+ */
+static inline void ebpf_sync_disable_trampoline(struct sync_bpf *obj)
+{
+ bpf_program__set_autoload(obj->progs.netdata_sync_fentry, false);
+}
+
+/**
+ * Disable tracepoint
+ *
+ * Disable tracepoints according information given.
+ *
+ * @param obj object loaded
+ * @param idx Which syscall will not be disabled
+ */
+void ebpf_sync_disable_tracepoints(struct sync_bpf *obj, sync_syscalls_index_t idx)
+{
+ if (idx != NETDATA_SYNC_SYNC_IDX)
+ bpf_program__set_autoload(obj->progs.netdata_sync_entry, false);
+
+ if (idx != NETDATA_SYNC_SYNCFS_IDX)
+ bpf_program__set_autoload(obj->progs.netdata_syncfs_entry, false);
+
+ if (idx != NETDATA_SYNC_MSYNC_IDX)
+ bpf_program__set_autoload(obj->progs.netdata_msync_entry, false);
+
+ if (idx != NETDATA_SYNC_FSYNC_IDX)
+ bpf_program__set_autoload(obj->progs.netdata_fsync_entry, false);
+
+ if (idx != NETDATA_SYNC_FDATASYNC_IDX)
+ bpf_program__set_autoload(obj->progs.netdata_fdatasync_entry, false);
+
+ if (idx != NETDATA_SYNC_SYNC_FILE_RANGE_IDX)
+ bpf_program__set_autoload(obj->progs.netdata_sync_file_range_entry, false);
+}
+
+/**
+ * Set hash tables
+ *
+ * Set the values for maps according the value given by kernel.
+ *
+ * @param map the map loaded.
+ * @param obj the main structure for bpf objects.
+ */
+static void ebpf_sync_set_hash_tables(ebpf_local_maps_t *map, struct sync_bpf *obj)
+{
+ map->map_fd = bpf_map__fd(obj->maps.tbl_sync);
+}
+
+/**
+ * Load and attach
+ *
+ * Load and attach the eBPF code in kernel.
+ *
+ * @param obj is the main structure for bpf objects.
+ * @param em the structure with configuration
+ * @param target the syscall that we are attaching a tracer.
+ * @param idx the index for the main structure
+ *
+ * @return it returns 0 on success and -1 otherwise
+ */
+static inline int ebpf_sync_load_and_attach(struct sync_bpf *obj, ebpf_module_t *em, char *target,
+ sync_syscalls_index_t idx)
+{
+ netdata_ebpf_targets_t *synct = em->targets;
+ netdata_ebpf_program_loaded_t test = synct[NETDATA_SYNC_SYNC_IDX].mode;
+
+ if (test == EBPF_LOAD_TRAMPOLINE) {
+ ebpf_sync_disable_probe(obj);
+ ebpf_sync_disable_tracepoints(obj, NETDATA_SYNC_IDX_END);
+
+ bpf_program__set_attach_target(obj->progs.netdata_sync_fentry, 0,
+ target);
+ } else if (test == EBPF_LOAD_PROBE ||
+ test == EBPF_LOAD_RETPROBE) {
+ ebpf_sync_disable_tracepoints(obj, NETDATA_SYNC_IDX_END);
+ ebpf_sync_disable_trampoline(obj);
+ } else {
+ ebpf_sync_disable_probe(obj);
+ ebpf_sync_disable_trampoline(obj);
+
+ ebpf_sync_disable_tracepoints(obj, idx);
+ }
+
+ ebpf_update_map_type(obj->maps.tbl_sync, &em->maps[NETDATA_SYNC_GLOBAL_TABLE]);
+
+ int ret = sync_bpf__load(obj);
+ if (!ret) {
+ if (test != EBPF_LOAD_PROBE && test != EBPF_LOAD_RETPROBE) {
+ ret = sync_bpf__attach(obj);
+ } else {
+ obj->links.netdata_sync_kprobe = bpf_program__attach_kprobe(obj->progs.netdata_sync_kprobe,
+ false, target);
+ ret = (int)libbpf_get_error(obj->links.netdata_sync_kprobe);
+ }
+
+ if (!ret)
+ ebpf_sync_set_hash_tables(&em->maps[NETDATA_SYNC_GLOBAL_TABLE], obj);
+ }
+
+ return ret;
+}
+#endif
+
+/*****************************************************************
+ *
+ * CLEANUP THREAD
+ *
+ *****************************************************************/
+
+/**
+ * Cleanup Objects
+ *
+ * Cleanup loaded objects when thread was initialized.
+ */
+void ebpf_sync_cleanup_objects()
+{
+ int i;
+ for (i = 0; local_syscalls[i].syscall; i++) {
+ ebpf_sync_syscalls_t *w = &local_syscalls[i];
+#ifdef LIBBPF_MAJOR_VERSION
+ if (w->sync_obj) {
+ sync_bpf__destroy(w->sync_obj);
+ w->sync_obj = NULL;
+ }
+#endif
+ if (w->probe_links) {
+ ebpf_unload_legacy_code(w->objects, w->probe_links);
+ w->objects = NULL;
+ w->probe_links = NULL;
+ }
+ }
+}
+
+/*
+ static void ebpf_create_sync_chart(char *id,
+ char *title,
+ int order,
+ int idx,
+ int end,
+ int update_every)
+ {
+ ebpf_write_chart_cmd(NETDATA_EBPF_MEMORY_GROUP, id, title, EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_EBPF_SYNC_SUBMENU, NETDATA_EBPF_CHART_TYPE_LINE, NULL, order,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SYNC);
+ */
+
+/**
+ * Obsolete global
+ *
+ * Obsolete global charts created by thread.
+ *
+ * @param em a pointer to `struct ebpf_module`
+ */
+static void ebpf_obsolete_sync_global(ebpf_module_t *em)
+{
+ if (local_syscalls[NETDATA_SYNC_FSYNC_IDX].enabled && local_syscalls[NETDATA_SYNC_FDATASYNC_IDX].enabled)
+ ebpf_write_chart_obsolete(NETDATA_EBPF_MEMORY_GROUP,
+ NETDATA_EBPF_FILE_SYNC_CHART,
+ "",
+ "Monitor calls to fsync(2) and fdatasync(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_EBPF_SYNC_SUBMENU,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NULL,
+ 21300,
+ em->update_every);
+
+ if (local_syscalls[NETDATA_SYNC_MSYNC_IDX].enabled)
+ ebpf_write_chart_obsolete(NETDATA_EBPF_MEMORY_GROUP,
+ NETDATA_EBPF_MSYNC_CHART,
+ "",
+ "Monitor calls to msync(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_EBPF_SYNC_SUBMENU,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NULL,
+ 21301,
+ em->update_every);
+
+ if (local_syscalls[NETDATA_SYNC_SYNC_IDX].enabled && local_syscalls[NETDATA_SYNC_SYNCFS_IDX].enabled)
+ ebpf_write_chart_obsolete(NETDATA_EBPF_MEMORY_GROUP,
+ NETDATA_EBPF_SYNC_CHART,
+ "",
+ "Monitor calls to sync(2) and syncfs(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_EBPF_SYNC_SUBMENU,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NULL,
+ 21302,
+ em->update_every);
+
+ if (local_syscalls[NETDATA_SYNC_SYNC_FILE_RANGE_IDX].enabled)
+ ebpf_write_chart_obsolete(NETDATA_EBPF_MEMORY_GROUP,
+ NETDATA_EBPF_FILE_SEGMENT_CHART,
+ "",
+ "Monitor calls to sync_file_range(2).",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_EBPF_SYNC_SUBMENU,
+ NETDATA_EBPF_CHART_TYPE_LINE,
+ NULL,
+ 21303,
+ em->update_every);
+}
+
+/**
+ * Exit
+ *
+ * Clean up the main thread.
+ *
+ * @param ptr thread data.
+ */
+static void ebpf_sync_exit(void *ptr)
+{
+ ebpf_module_t *em = (ebpf_module_t *)ptr;
+
+ if (em->enabled == NETDATA_THREAD_EBPF_FUNCTION_RUNNING) {
+ pthread_mutex_lock(&lock);
+ ebpf_obsolete_sync_global(em);
+ pthread_mutex_unlock(&lock);
+ }
+
+ ebpf_sync_cleanup_objects();
+
+ pthread_mutex_lock(&ebpf_exit_cleanup);
+ em->enabled = NETDATA_THREAD_EBPF_STOPPED;
+ ebpf_update_stats(&plugin_statistics, em);
+ pthread_mutex_unlock(&ebpf_exit_cleanup);
+}
+
+/*****************************************************************
+ *
+ * INITIALIZE THREAD
+ *
+ *****************************************************************/
+
+/**
+ * Load Legacy
+ *
+ * Load legacy code.
+ *
+ * @param w is the sync output structure with pointers to objects loaded.
+ * @param em is structure with configuration
+ *
+ * @return 0 on success and -1 otherwise.
+ */
+static int ebpf_sync_load_legacy(ebpf_sync_syscalls_t *w, ebpf_module_t *em)
+{
+ em->info.thread_name = w->syscall;
+ if (!w->probe_links) {
+ w->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &w->objects);
+ if (!w->probe_links) {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Initialize Syscalls
+ *
+ * Load the eBPF programs to monitor syscalls
+ *
+ * @return 0 on success and -1 otherwise.
+ */
+static int ebpf_sync_initialize_syscall(ebpf_module_t *em)
+{
+#ifdef LIBBPF_MAJOR_VERSION
+ ebpf_define_map_type(sync_maps, em->maps_per_core, running_on_kernel);
+ ebpf_define_map_type(syncfs_maps, em->maps_per_core, running_on_kernel);
+ ebpf_define_map_type(msync_maps, em->maps_per_core, running_on_kernel);
+ ebpf_define_map_type(fsync_maps, em->maps_per_core, running_on_kernel);
+ ebpf_define_map_type(fdatasync_maps, em->maps_per_core, running_on_kernel);
+ ebpf_define_map_type(sync_file_range_maps, em->maps_per_core, running_on_kernel);
+#endif
+
+ int i;
+ const char *saved_name = em->info.thread_name;
+ int errors = 0;
+ for (i = 0; local_syscalls[i].syscall; i++) {
+ ebpf_sync_syscalls_t *w = &local_syscalls[i];
+ w->sync_maps = local_syscalls[i].sync_maps;
+ em->maps = local_syscalls[i].sync_maps;
+ if (w->enabled) {
+ if (em->load & EBPF_LOAD_LEGACY) {
+ if (ebpf_sync_load_legacy(w, em))
+ errors++;
+
+ em->info.thread_name = saved_name;
+ }
+#ifdef LIBBPF_MAJOR_VERSION
+ else {
+ char syscall[NETDATA_EBPF_MAX_SYSCALL_LENGTH];
+ ebpf_select_host_prefix(syscall, NETDATA_EBPF_MAX_SYSCALL_LENGTH, w->syscall, running_on_kernel);
+ if (ebpf_is_function_inside_btf(default_btf, syscall)) {
+ w->sync_obj = sync_bpf__open();
+ if (!w->sync_obj) {
+ w->enabled = false;
+ errors++;
+ } else {
+ if (ebpf_sync_load_and_attach(w->sync_obj, em, syscall, i)) {
+ w->enabled = false;
+ errors++;
+ }
+ }
+ } else {
+ netdata_log_info("Cannot find syscall %s we are not going to monitor it.", syscall);
+ w->enabled = false;
+ }
+
+ em->info.thread_name = saved_name;
+ }
+#endif
+ }
+ }
+ em->info.thread_name = saved_name;
+
+ memset(sync_counter_aggregated_data, 0 , NETDATA_SYNC_IDX_END * sizeof(netdata_syscall_stat_t));
+ memset(sync_counter_publish_aggregated, 0 , NETDATA_SYNC_IDX_END * sizeof(netdata_publish_syscall_t));
+ memset(sync_hash_values, 0 , NETDATA_SYNC_IDX_END * sizeof(netdata_idx_t));
+
+ return (errors) ? -1 : 0;
+}
+
+/*****************************************************************
+ *
+ * DATA THREAD
+ *
+ *****************************************************************/
+
+/**
+ * Read global table
+ *
+ * Read the table with number of calls for all functions
+ *
+ * @param maps_per_core do I need to read all cores?
+ */
+static void ebpf_sync_read_global_table(int maps_per_core)
+{
+ netdata_idx_t stored[NETDATA_MAX_PROCESSOR];
+ uint32_t idx = NETDATA_SYNC_CALL;
+ int i;
+ for (i = 0; local_syscalls[i].syscall; i++) {
+ ebpf_sync_syscalls_t *w = &local_syscalls[i];
+ if (w->enabled) {
+ int fd = w->sync_maps[NETDATA_SYNC_GLOBAL_TABLE].map_fd;
+ if (!bpf_map_lookup_elem(fd, &idx, &stored)) {
+ int j, end = (maps_per_core) ? ebpf_nprocs : 1;
+ netdata_idx_t total = 0;
+ for (j = 0; j < end ;j++ )
+ total += stored[j];
+
+ sync_hash_values[i] = total;
+ }
+ }
+ }
+}
+
+/**
+ * Create Sync charts
+ *
+ * Create charts and dimensions according user input.
+ *
+ * @param id chart id
+ * @param idx the first index with data.
+ * @param end the last index with data.
+ */
+static void ebpf_send_sync_chart(char *id,
+ int idx,
+ int end)
+{
+ ebpf_write_begin_chart(NETDATA_EBPF_MEMORY_GROUP, id, "");
+
+ netdata_publish_syscall_t *move = &sync_counter_publish_aggregated[idx];
+
+ while (move && idx <= end) {
+ if (local_syscalls[idx].enabled)
+ write_chart_dimension(move->name, (long long)sync_hash_values[idx]);
+
+ move = move->next;
+ idx++;
+ }
+
+ ebpf_write_end_chart();
+}
+
+/**
+ * Send data
+ *
+ * Send global charts to Netdata
+ */
+static void sync_send_data()
+{
+ if (local_syscalls[NETDATA_SYNC_FSYNC_IDX].enabled && local_syscalls[NETDATA_SYNC_FDATASYNC_IDX].enabled) {
+ ebpf_send_sync_chart(NETDATA_EBPF_FILE_SYNC_CHART, NETDATA_SYNC_FSYNC_IDX, NETDATA_SYNC_FDATASYNC_IDX);
+ }
+
+ if (local_syscalls[NETDATA_SYNC_MSYNC_IDX].enabled)
+ ebpf_one_dimension_write_charts(NETDATA_EBPF_MEMORY_GROUP, NETDATA_EBPF_MSYNC_CHART,
+ sync_counter_publish_aggregated[NETDATA_SYNC_MSYNC_IDX].dimension,
+ sync_hash_values[NETDATA_SYNC_MSYNC_IDX]);
+
+ if (local_syscalls[NETDATA_SYNC_SYNC_IDX].enabled && local_syscalls[NETDATA_SYNC_SYNCFS_IDX].enabled) {
+ ebpf_send_sync_chart(NETDATA_EBPF_SYNC_CHART, NETDATA_SYNC_SYNC_IDX, NETDATA_SYNC_SYNCFS_IDX);
+ }
+
+ if (local_syscalls[NETDATA_SYNC_SYNC_FILE_RANGE_IDX].enabled)
+ ebpf_one_dimension_write_charts(NETDATA_EBPF_MEMORY_GROUP, NETDATA_EBPF_FILE_SEGMENT_CHART,
+ sync_counter_publish_aggregated[NETDATA_SYNC_SYNC_FILE_RANGE_IDX].dimension,
+ sync_hash_values[NETDATA_SYNC_SYNC_FILE_RANGE_IDX]);
+}
+
+/**
+* Main loop for this collector.
+*/
+static void sync_collector(ebpf_module_t *em)
+{
+ 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;
+ while (!ebpf_plugin_exit && running_time < lifetime) {
+ (void)heartbeat_next(&hb, USEC_PER_SEC);
+ if (ebpf_plugin_exit || ++counter != update_every)
+ continue;
+
+ counter = 0;
+ ebpf_sync_read_global_table(maps_per_core);
+ pthread_mutex_lock(&lock);
+
+ sync_send_data();
+
+ pthread_mutex_unlock(&lock);
+
+ pthread_mutex_lock(&ebpf_exit_cleanup);
+ if (running_time && !em->running_time)
+ running_time = update_every;
+ else
+ running_time += update_every;
+
+ em->running_time = running_time;
+ pthread_mutex_unlock(&ebpf_exit_cleanup);
+ }
+}
+
+
+/*****************************************************************
+ *
+ * MAIN THREAD
+ *
+ *****************************************************************/
+
+/**
+ * Create Sync charts
+ *
+ * Create charts and dimensions according user input.
+ *
+ * @param id chart id
+ * @param title chart title
+ * @param order order number of the specified chart
+ * @param idx the first index with data.
+ * @param end the last index with data.
+ * @param update_every value to overwrite the update frequency set by the server.
+ */
+static void ebpf_create_sync_chart(char *id,
+ char *title,
+ int order,
+ int idx,
+ int end,
+ int update_every)
+{
+ ebpf_write_chart_cmd(NETDATA_EBPF_MEMORY_GROUP, id, "", title, EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_EBPF_SYNC_SUBMENU, NETDATA_EBPF_CHART_TYPE_LINE, NULL, order,
+ update_every,
+ NETDATA_EBPF_MODULE_NAME_SYNC);
+
+ netdata_publish_syscall_t *move = &sync_counter_publish_aggregated[idx];
+
+ while (move && idx <= end) {
+ if (local_syscalls[idx].enabled)
+ ebpf_write_global_dimension(move->name, move->dimension, move->algorithm);
+
+ move = move->next;
+ idx++;
+ }
+}
+
+/**
+ * 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_sync_charts(int update_every)
+{
+ if (local_syscalls[NETDATA_SYNC_FSYNC_IDX].enabled && local_syscalls[NETDATA_SYNC_FDATASYNC_IDX].enabled)
+ ebpf_create_sync_chart(NETDATA_EBPF_FILE_SYNC_CHART,
+ "Monitor calls to fsync(2) and fdatasync(2).", 21300,
+ NETDATA_SYNC_FSYNC_IDX, NETDATA_SYNC_FDATASYNC_IDX, update_every);
+
+ if (local_syscalls[NETDATA_SYNC_MSYNC_IDX].enabled)
+ ebpf_create_sync_chart(NETDATA_EBPF_MSYNC_CHART,
+ "Monitor calls to msync(2).", 21301,
+ NETDATA_SYNC_MSYNC_IDX, NETDATA_SYNC_MSYNC_IDX, update_every);
+
+ if (local_syscalls[NETDATA_SYNC_SYNC_IDX].enabled && local_syscalls[NETDATA_SYNC_SYNCFS_IDX].enabled)
+ ebpf_create_sync_chart(NETDATA_EBPF_SYNC_CHART,
+ "Monitor calls to sync(2) and syncfs(2).", 21302,
+ NETDATA_SYNC_SYNC_IDX, NETDATA_SYNC_SYNCFS_IDX, update_every);
+
+ if (local_syscalls[NETDATA_SYNC_SYNC_FILE_RANGE_IDX].enabled)
+ ebpf_create_sync_chart(NETDATA_EBPF_FILE_SEGMENT_CHART,
+ "Monitor calls to sync_file_range(2).", 21303,
+ NETDATA_SYNC_SYNC_FILE_RANGE_IDX, NETDATA_SYNC_SYNC_FILE_RANGE_IDX, update_every);
+
+ fflush(stdout);
+}
+
+/**
+ * Parse Syscalls
+ *
+ * Parse syscall options available inside ebpf.d/sync.conf
+ */
+static void ebpf_sync_parse_syscalls()
+{
+ int i;
+ for (i = 0; local_syscalls[i].syscall; i++) {
+ local_syscalls[i].enabled = appconfig_get_boolean(&sync_config, NETDATA_SYNC_CONFIG_NAME,
+ local_syscalls[i].syscall, CONFIG_BOOLEAN_YES);
+ }
+}
+
+/**
+ * Set sync maps
+ *
+ * When thread is initialized the variable sync_maps is set as null,
+ * this function fills the variable before to use.
+ */
+static void ebpf_set_sync_maps()
+{
+ local_syscalls[NETDATA_SYNC_SYNC_IDX].sync_maps = sync_maps;
+ local_syscalls[NETDATA_SYNC_SYNCFS_IDX].sync_maps = syncfs_maps;
+ local_syscalls[NETDATA_SYNC_MSYNC_IDX].sync_maps = msync_maps;
+ local_syscalls[NETDATA_SYNC_FSYNC_IDX].sync_maps = fsync_maps;
+ local_syscalls[NETDATA_SYNC_FDATASYNC_IDX].sync_maps = fdatasync_maps;
+ local_syscalls[NETDATA_SYNC_SYNC_FILE_RANGE_IDX].sync_maps = sync_file_range_maps;
+}
+
+/**
+ * Sync thread
+ *
+ * Thread used to make sync thread
+ *
+ * @param ptr a pointer to `struct ebpf_module`
+ *
+ * @return It always return NULL
+ */
+void *ebpf_sync_thread(void *ptr)
+{
+ netdata_thread_cleanup_push(ebpf_sync_exit, ptr);
+
+ ebpf_module_t *em = (ebpf_module_t *)ptr;
+
+ ebpf_set_sync_maps();
+ ebpf_sync_parse_syscalls();
+
+#ifdef LIBBPF_MAJOR_VERSION
+ ebpf_adjust_thread_load(em, default_btf);
+#endif
+ if (ebpf_sync_initialize_syscall(em)) {
+ goto endsync;
+ }
+
+ int algorithms[NETDATA_SYNC_IDX_END] = { NETDATA_EBPF_INCREMENTAL_IDX, NETDATA_EBPF_INCREMENTAL_IDX,
+ NETDATA_EBPF_INCREMENTAL_IDX, NETDATA_EBPF_INCREMENTAL_IDX,
+ NETDATA_EBPF_INCREMENTAL_IDX, NETDATA_EBPF_INCREMENTAL_IDX };
+ ebpf_global_labels(sync_counter_aggregated_data, sync_counter_publish_aggregated,
+ sync_counter_dimension_name, sync_counter_dimension_name,
+ algorithms, NETDATA_SYNC_IDX_END);
+
+ pthread_mutex_lock(&lock);
+ ebpf_create_sync_charts(em->update_every);
+ ebpf_update_stats(&plugin_statistics, em);
+ pthread_mutex_unlock(&lock);
+
+ sync_collector(em);
+
+endsync:
+ ebpf_update_disabled_plugin_stats(em);
+
+ netdata_thread_cleanup_pop(1);
+ return NULL;
+}