netdata/collectors/ebpf.plugin/ebpf_vfs.c

// SPDX-License-Identifier: GPL-3.0-or-later

#include <sys/resource.h>

#include "ebpf.h"
#include "ebpf_vfs.h"

static char *vfs_dimension_names[NETDATA_KEY_PUBLISH_VFS_END] = { "delete",  "read",  "write",
                                                                  "fsync", "open", "create" };
static char *vfs_id_names[NETDATA_KEY_PUBLISH_VFS_END] = { "vfs_unlink", "vfs_read", "vfs_write",
                                                           "vfs_fsync", "vfs_open", "vfs_create"};

static netdata_idx_t *vfs_hash_values = NULL;
static netdata_syscall_stat_t vfs_aggregated_data[NETDATA_KEY_PUBLISH_VFS_END];
static netdata_publish_syscall_t vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_END];
netdata_publish_vfs_t **vfs_pid = NULL;
netdata_publish_vfs_t *vfs_vector = NULL;

static ebpf_local_maps_t vfs_maps[] = {{.name = "tbl_vfs_pid", .internal_input = ND_EBPF_DEFAULT_PID_SIZE,
                                        .user_input = 0, .type = NETDATA_EBPF_MAP_RESIZABLE | NETDATA_EBPF_MAP_PID,
                                        .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED},
                                       {.name = "tbl_vfs_stats", .internal_input = NETDATA_VFS_COUNTER,
                                        .user_input = 0, .type = NETDATA_EBPF_MAP_STATIC,
                                        .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED},
                                       {.name = "vfs_ctrl", .internal_input = NETDATA_CONTROLLER_END,
                                        .user_input = 0,
                                        .type = NETDATA_EBPF_MAP_CONTROLLER,
                                        .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED},
                                       {.name = NULL, .internal_input = 0, .user_input = 0}};

struct config vfs_config = { .first_section = NULL,
    .last_section = NULL,
    .mutex = NETDATA_MUTEX_INITIALIZER,
    .index = { .avl_tree = { .root = NULL, .compar = appconfig_section_compare },
    .rwlock = AVL_LOCK_INITIALIZER } };

struct netdata_static_thread vfs_threads = {"VFS KERNEL",
                                            NULL, NULL, 1, NULL,
                                            NULL,  NULL};
static enum ebpf_threads_status ebpf_vfs_exited = NETDATA_THREAD_EBPF_RUNNING;

/*****************************************************************
 *
 *  FUNCTIONS TO CLOSE THE THREAD
 *
 *****************************************************************/
/**
 * Exit
 *
 * Cancel thread and exit.
 *
 * @param ptr thread data.
**/
static void ebpf_vfs_exit(void *ptr)
{
    ebpf_module_t *em = (ebpf_module_t *)ptr;
    if (!em->enabled) {
        em->enabled = NETDATA_MAIN_THREAD_EXITED;
        return;
    }

    ebpf_vfs_exited = NETDATA_THREAD_EBPF_STOPPING;
}

/**
* Clean up the main thread.
*
* @param ptr thread data.
**/
static void ebpf_vfs_cleanup(void *ptr)
{
    ebpf_module_t *em = (ebpf_module_t *)ptr;
    if (ebpf_vfs_exited != NETDATA_THREAD_EBPF_STOPPED)
        return;

    freez(vfs_hash_values);
    freez(vfs_vector);
    freez(vfs_threads.thread);

    vfs_threads.enabled = NETDATA_MAIN_THREAD_EXITED;
    em->enabled = NETDATA_MAIN_THREAD_EXITED;
}

/*****************************************************************
 *
 *  FUNCTIONS WITH THE MAIN LOOP
 *
 *****************************************************************/

/**
 * Send data to Netdata calling auxiliary functions.
 *
 * @param em the structure with thread information
*/
static void ebpf_vfs_send_data(ebpf_module_t *em)
{
    netdata_publish_vfs_common_t pvc;

    pvc.write = (long)vfs_aggregated_data[NETDATA_KEY_PUBLISH_VFS_WRITE].bytes;
    pvc.read = (long)vfs_aggregated_data[NETDATA_KEY_PUBLISH_VFS_READ].bytes;

    write_count_chart(NETDATA_VFS_FILE_CLEAN_COUNT, NETDATA_FILESYSTEM_FAMILY,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_UNLINK], 1);

    write_count_chart(NETDATA_VFS_FILE_IO_COUNT, NETDATA_FILESYSTEM_FAMILY,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ], 2);

    if (em->mode < MODE_ENTRY) {
        write_err_chart(NETDATA_VFS_FILE_ERR_COUNT, NETDATA_FILESYSTEM_FAMILY,
                        &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ], 2);
    }

    write_io_chart(NETDATA_VFS_IO_FILE_BYTES, NETDATA_FILESYSTEM_FAMILY, vfs_id_names[NETDATA_KEY_PUBLISH_VFS_WRITE],
                   (long long)pvc.write, vfs_id_names[NETDATA_KEY_PUBLISH_VFS_READ], (long long)pvc.read);

    write_count_chart(NETDATA_VFS_FSYNC, NETDATA_FILESYSTEM_FAMILY,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC], 1);

    if (em->mode < MODE_ENTRY) {
        write_err_chart(NETDATA_VFS_FSYNC_ERR, NETDATA_FILESYSTEM_FAMILY,
                        &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC], 1);
    }

    write_count_chart(NETDATA_VFS_OPEN, NETDATA_FILESYSTEM_FAMILY,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN], 1);

    if (em->mode < MODE_ENTRY) {
        write_err_chart(NETDATA_VFS_OPEN_ERR, NETDATA_FILESYSTEM_FAMILY,
                        &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN], 1);
    }

    write_count_chart(NETDATA_VFS_CREATE, NETDATA_FILESYSTEM_FAMILY,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE], 1);

    if (em->mode < MODE_ENTRY) {
        write_err_chart(
            NETDATA_VFS_CREATE_ERR,
            NETDATA_FILESYSTEM_FAMILY,
            &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE],
            1);
    }
}

/**
 * Read the hash table and store data to allocated vectors.
 */
static void read_global_table()
{
    uint64_t idx;
    netdata_idx_t res[NETDATA_VFS_COUNTER];

    netdata_idx_t *val = vfs_hash_values;
    int fd = vfs_maps[NETDATA_VFS_ALL].map_fd;
    for (idx = 0; idx < NETDATA_VFS_COUNTER; idx++) {
        uint64_t total = 0;
        if (!bpf_map_lookup_elem(fd, &idx, val)) {
            int i;
            int end = ebpf_nprocs;
            for (i = 0; i < end; i++)
                total += val[i];
        }
        res[idx] = total;
    }

    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_UNLINK].ncall = res[NETDATA_KEY_CALLS_VFS_UNLINK];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ].ncall = res[NETDATA_KEY_CALLS_VFS_READ] +
                                                             res[NETDATA_KEY_CALLS_VFS_READV];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE].ncall = res[NETDATA_KEY_CALLS_VFS_WRITE] +
                                                              res[NETDATA_KEY_CALLS_VFS_WRITEV];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC].ncall = res[NETDATA_KEY_CALLS_VFS_FSYNC];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN].ncall = res[NETDATA_KEY_CALLS_VFS_OPEN];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE].ncall = res[NETDATA_KEY_CALLS_VFS_CREATE];

    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_UNLINK].nerr = res[NETDATA_KEY_ERROR_VFS_UNLINK];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ].nerr = res[NETDATA_KEY_ERROR_VFS_READ] +
                                                                res[NETDATA_KEY_ERROR_VFS_READV];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE].nerr = res[NETDATA_KEY_ERROR_VFS_WRITE] +
                                                                 res[NETDATA_KEY_ERROR_VFS_WRITEV];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC].nerr = res[NETDATA_KEY_ERROR_VFS_FSYNC];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN].nerr = res[NETDATA_KEY_ERROR_VFS_OPEN];
    vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE].nerr = res[NETDATA_KEY_ERROR_VFS_CREATE];

    vfs_aggregated_data[NETDATA_KEY_PUBLISH_VFS_WRITE].bytes = (uint64_t)res[NETDATA_KEY_BYTES_VFS_WRITE] +
                                                               (uint64_t)res[NETDATA_KEY_BYTES_VFS_WRITEV];
    vfs_aggregated_data[NETDATA_KEY_PUBLISH_VFS_READ].bytes = (uint64_t)res[NETDATA_KEY_BYTES_VFS_READ] +
                                                              (uint64_t)res[NETDATA_KEY_BYTES_VFS_READV];
}

/**
 * Sum PIDs
 *
 * Sum values for all targets.
 *
 * @param swap output structure
 * @param root link list with structure to be used
 */
static void ebpf_vfs_sum_pids(netdata_publish_vfs_t *vfs, struct pid_on_target *root)
{
    netdata_publish_vfs_t accumulator;
    memset(&accumulator, 0, sizeof(accumulator));

    while (root) {
        int32_t pid = root->pid;
        netdata_publish_vfs_t *w = vfs_pid[pid];
        if (w) {
            accumulator.write_call += w->write_call;
            accumulator.writev_call += w->writev_call;
            accumulator.read_call += w->read_call;
            accumulator.readv_call += w->readv_call;
            accumulator.unlink_call += w->unlink_call;
            accumulator.fsync_call += w->fsync_call;
            accumulator.open_call += w->open_call;
            accumulator.create_call += w->create_call;

            accumulator.write_bytes += w->write_bytes;
            accumulator.writev_bytes += w->writev_bytes;
            accumulator.read_bytes += w->read_bytes;
            accumulator.readv_bytes += w->readv_bytes;

            accumulator.write_err += w->write_err;
            accumulator.writev_err += w->writev_err;
            accumulator.read_err += w->read_err;
            accumulator.readv_err += w->readv_err;
            accumulator.unlink_err += w->unlink_err;
            accumulator.fsync_err += w->fsync_err;
            accumulator.open_err += w->open_err;
            accumulator.create_err += w->create_err;
        }
        root = root->next;
    }

    // These conditions were added, because we are using incremental algorithm
    vfs->write_call = (accumulator.write_call >= vfs->write_call) ? accumulator.write_call : vfs->write_call;
    vfs->writev_call = (accumulator.writev_call >= vfs->writev_call) ? accumulator.writev_call : vfs->writev_call;
    vfs->read_call = (accumulator.read_call >= vfs->read_call) ? accumulator.read_call : vfs->read_call;
    vfs->readv_call = (accumulator.readv_call >= vfs->readv_call) ? accumulator.readv_call : vfs->readv_call;
    vfs->unlink_call = (accumulator.unlink_call >= vfs->unlink_call) ? accumulator.unlink_call : vfs->unlink_call;
    vfs->fsync_call = (accumulator.fsync_call >= vfs->fsync_call) ? accumulator.fsync_call : vfs->fsync_call;
    vfs->open_call = (accumulator.open_call >= vfs->open_call) ? accumulator.open_call : vfs->open_call;
    vfs->create_call = (accumulator.create_call >= vfs->create_call) ? accumulator.create_call : vfs->create_call;

    vfs->write_bytes = (accumulator.write_bytes >= vfs->write_bytes) ? accumulator.write_bytes : vfs->write_bytes;
    vfs->writev_bytes = (accumulator.writev_bytes >= vfs->writev_bytes) ? accumulator.writev_bytes : vfs->writev_bytes;
    vfs->read_bytes = (accumulator.read_bytes >= vfs->read_bytes) ? accumulator.read_bytes : vfs->read_bytes;
    vfs->readv_bytes = (accumulator.readv_bytes >= vfs->readv_bytes) ? accumulator.readv_bytes : vfs->readv_bytes;

    vfs->write_err = (accumulator.write_err >= vfs->write_err) ? accumulator.write_err : vfs->write_err;
    vfs->writev_err = (accumulator.writev_err >= vfs->writev_err) ? accumulator.writev_err : vfs->writev_err;
    vfs->read_err = (accumulator.read_err >= vfs->read_err) ? accumulator.read_err : vfs->read_err;
    vfs->readv_err = (accumulator.readv_err >= vfs->readv_err) ? accumulator.readv_err : vfs->readv_err;
    vfs->unlink_err = (accumulator.unlink_err >= vfs->unlink_err) ? accumulator.unlink_err : vfs->unlink_err;
    vfs->fsync_err = (accumulator.fsync_err >= vfs->fsync_err) ? accumulator.fsync_err : vfs->fsync_err;
    vfs->open_err = (accumulator.open_err >= vfs->open_err) ? accumulator.open_err : vfs->open_err;
    vfs->create_err = (accumulator.create_err >= vfs->create_err) ? accumulator.create_err : vfs->create_err;
}

/**
 * Send data to Netdata calling auxiliary functions.
 *
 * @param em   the structure with thread information
 * @param root the target list.
 */
void ebpf_vfs_send_apps_data(ebpf_module_t *em, struct target *root)
{
    struct target *w;
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            ebpf_vfs_sum_pids(&w->vfs, w->root_pid);
        }
    }

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_FILE_DELETED);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.unlink_call);
        }
    }
    write_end_chart();

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.write_call + w->vfs.writev_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS_ERROR);
        for (w = root; w; w = w->next) {
            if (unlikely(w->exposed && w->processes)) {
                write_chart_dimension(w->name, w->vfs.write_err + w->vfs.writev_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_READ_CALLS);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.read_call + w->vfs.readv_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_READ_CALLS_ERROR);
        for (w = root; w; w = w->next) {
            if (unlikely(w->exposed && w->processes)) {
                write_chart_dimension(w->name, w->vfs.read_err + w->vfs.readv_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_WRITE_BYTES);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.write_bytes + w->vfs.writev_bytes);
        }
    }
    write_end_chart();

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_READ_BYTES);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.read_bytes + w->vfs.readv_bytes);
        }
    }
    write_end_chart();

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_FSYNC);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.fsync_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_FSYNC_CALLS_ERROR);
        for (w = root; w; w = w->next) {
            if (unlikely(w->exposed && w->processes)) {
                write_chart_dimension(w->name, w->vfs.fsync_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_OPEN);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.open_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_OPEN_CALLS_ERROR);
        for (w = root; w; w = w->next) {
            if (unlikely(w->exposed && w->processes)) {
                write_chart_dimension(w->name, w->vfs.open_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_CREATE);
    for (w = root; w; w = w->next) {
        if (unlikely(w->exposed && w->processes)) {
            write_chart_dimension(w->name, w->vfs.create_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_SYSCALL_APPS_VFS_CREATE_CALLS_ERROR);
        for (w = root; w; w = w->next) {
            if (unlikely(w->exposed && w->processes)) {
                write_chart_dimension(w->name, w->vfs.create_err);
            }
        }
        write_end_chart();
    }
}

/**
 * Apps Accumulator
 *
 * Sum all values read from kernel and store in the first address.
 *
 * @param out the vector with read values.
 */
static void vfs_apps_accumulator(netdata_publish_vfs_t *out)
{
    int i, end = (running_on_kernel >= NETDATA_KERNEL_V4_15) ? ebpf_nprocs : 1;
    netdata_publish_vfs_t *total = &out[0];
    for (i = 1; i < end; i++) {
        netdata_publish_vfs_t *w = &out[i];

        total->write_call += w->write_call;
        total->writev_call += w->writev_call;
        total->read_call += w->read_call;
        total->readv_call += w->readv_call;
        total->unlink_call += w->unlink_call;

        total->write_bytes += w->write_bytes;
        total->writev_bytes += w->writev_bytes;
        total->read_bytes += w->read_bytes;
        total->readv_bytes += w->readv_bytes;

        total->write_err += w->write_err;
        total->writev_err += w->writev_err;
        total->read_err += w->read_err;
        total->readv_err += w->readv_err;
        total->unlink_err += w->unlink_err;
    }
}

/**
 * Fill PID
 *
 * Fill PID structures
 *
 * @param current_pid pid that we are collecting data
 * @param out         values read from hash tables;
 */
static void vfs_fill_pid(uint32_t current_pid, netdata_publish_vfs_t *publish)
{
    netdata_publish_vfs_t *curr = vfs_pid[current_pid];
    if (!curr) {
        curr = callocz(1, sizeof(netdata_publish_vfs_t));
        vfs_pid[current_pid] = curr;
    }

    memcpy(curr, &publish[0], sizeof(netdata_publish_vfs_t));
}

/**
 * Read the hash table and store data to allocated vectors.
 */
static void ebpf_vfs_read_apps()
{
    struct pid_stat *pids = root_of_pids;
    netdata_publish_vfs_t *vv = vfs_vector;
    int fd = vfs_maps[NETDATA_VFS_PID].map_fd;
    size_t length = sizeof(netdata_publish_vfs_t) * ebpf_nprocs;
    while (pids) {
        uint32_t key = pids->pid;

        if (bpf_map_lookup_elem(fd, &key, vv)) {
            pids = pids->next;
            continue;
        }

        vfs_apps_accumulator(vv);

        vfs_fill_pid(key, vv);

        // We are cleaning to avoid passing data read from one process to other.
        memset(vv, 0, length);

        pids = pids->next;
    }
}

/**
 * Update cgroup
 *
 * Update cgroup data based in
 */
static void read_update_vfs_cgroup()
{
    ebpf_cgroup_target_t *ect ;
    netdata_publish_vfs_t *vv = vfs_vector;
    int fd = vfs_maps[NETDATA_VFS_PID].map_fd;
    size_t length = sizeof(netdata_publish_vfs_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_publish_vfs_t *out = &pids->vfs;
            if (likely(vfs_pid) && vfs_pid[pid]) {
                netdata_publish_vfs_t *in = vfs_pid[pid];

                memcpy(out, in, sizeof(netdata_publish_vfs_t));
            } else {
                memset(vv, 0, length);
                if (!bpf_map_lookup_elem(fd, &pid, vv)) {
                    vfs_apps_accumulator(vv);

                    memcpy(out, vv, sizeof(netdata_publish_vfs_t));
                }
            }
        }
    }
    pthread_mutex_unlock(&mutex_cgroup_shm);
}

/**
 * VFS read hash
 *
 * This is the thread callback.
 * This thread is necessary, because we cannot freeze the whole plugin to read the data.
 *
 * @param ptr It is a NULL value for this thread.
 *
 * @return It always returns NULL.
 */
void *ebpf_vfs_read_hash(void *ptr)
{
    netdata_thread_cleanup_push(ebpf_vfs_cleanup, ptr);
    heartbeat_t hb;
    heartbeat_init(&hb);

    ebpf_module_t *em = (ebpf_module_t *)ptr;

    usec_t step = NETDATA_LATENCY_VFS_SLEEP_MS * em->update_every;
    //This will be cancelled by its parent
    while (ebpf_vfs_exited == NETDATA_THREAD_EBPF_RUNNING) {
        usec_t dt = heartbeat_next(&hb, step);
        (void)dt;
        if (ebpf_vfs_exited == NETDATA_THREAD_EBPF_STOPPING)
            break;

        read_global_table();
    }

    ebpf_vfs_exited = NETDATA_THREAD_EBPF_STOPPED;

    netdata_thread_cleanup_pop(1);
    return NULL;
}

/**
 * Sum PIDs
 *
 * Sum values for all targets.
 *
 * @param vfs  structure used to store data
 * @param pids input data
 */
static void ebpf_vfs_sum_cgroup_pids(netdata_publish_vfs_t *vfs, struct pid_on_target2 *pids)
    {
    netdata_publish_vfs_t accumulator;
    memset(&accumulator, 0, sizeof(accumulator));

    while (pids) {
        netdata_publish_vfs_t *w = &pids->vfs;

        accumulator.write_call += w->write_call;
        accumulator.writev_call += w->writev_call;
        accumulator.read_call += w->read_call;
        accumulator.readv_call += w->readv_call;
        accumulator.unlink_call += w->unlink_call;
        accumulator.fsync_call += w->fsync_call;
        accumulator.open_call += w->open_call;
        accumulator.create_call += w->create_call;

        accumulator.write_bytes += w->write_bytes;
        accumulator.writev_bytes += w->writev_bytes;
        accumulator.read_bytes += w->read_bytes;
        accumulator.readv_bytes += w->readv_bytes;

        accumulator.write_err += w->write_err;
        accumulator.writev_err += w->writev_err;
        accumulator.read_err += w->read_err;
        accumulator.readv_err += w->readv_err;
        accumulator.unlink_err += w->unlink_err;
        accumulator.fsync_err += w->fsync_err;
        accumulator.open_err += w->open_err;
        accumulator.create_err += w->create_err;

        pids = pids->next;
    }

    // These conditions were added, because we are using incremental algorithm
    vfs->write_call = (accumulator.write_call >= vfs->write_call) ? accumulator.write_call : vfs->write_call;
    vfs->writev_call = (accumulator.writev_call >= vfs->writev_call) ? accumulator.writev_call : vfs->writev_call;
    vfs->read_call = (accumulator.read_call >= vfs->read_call) ? accumulator.read_call : vfs->read_call;
    vfs->readv_call = (accumulator.readv_call >= vfs->readv_call) ? accumulator.readv_call : vfs->readv_call;
    vfs->unlink_call = (accumulator.unlink_call >= vfs->unlink_call) ? accumulator.unlink_call : vfs->unlink_call;
    vfs->fsync_call = (accumulator.fsync_call >= vfs->fsync_call) ? accumulator.fsync_call : vfs->fsync_call;
    vfs->open_call = (accumulator.open_call >= vfs->open_call) ? accumulator.open_call : vfs->open_call;
    vfs->create_call = (accumulator.create_call >= vfs->create_call) ? accumulator.create_call : vfs->create_call;

    vfs->write_bytes = (accumulator.write_bytes >= vfs->write_bytes) ? accumulator.write_bytes : vfs->write_bytes;
    vfs->writev_bytes = (accumulator.writev_bytes >= vfs->writev_bytes) ? accumulator.writev_bytes : vfs->writev_bytes;
    vfs->read_bytes = (accumulator.read_bytes >= vfs->read_bytes) ? accumulator.read_bytes : vfs->read_bytes;
    vfs->readv_bytes = (accumulator.readv_bytes >= vfs->readv_bytes) ? accumulator.readv_bytes : vfs->readv_bytes;

    vfs->write_err = (accumulator.write_err >= vfs->write_err) ? accumulator.write_err : vfs->write_err;
    vfs->writev_err = (accumulator.writev_err >= vfs->writev_err) ? accumulator.writev_err : vfs->writev_err;
    vfs->read_err = (accumulator.read_err >= vfs->read_err) ? accumulator.read_err : vfs->read_err;
    vfs->readv_err = (accumulator.readv_err >= vfs->readv_err) ? accumulator.readv_err : vfs->readv_err;
    vfs->unlink_err = (accumulator.unlink_err >= vfs->unlink_err) ? accumulator.unlink_err : vfs->unlink_err;
    vfs->fsync_err = (accumulator.fsync_err >= vfs->fsync_err) ? accumulator.fsync_err : vfs->fsync_err;
    vfs->open_err = (accumulator.open_err >= vfs->open_err) ? accumulator.open_err : vfs->open_err;
    vfs->create_err = (accumulator.create_err >= vfs->create_err) ? accumulator.create_err : vfs->create_err;
}

/**
 * Create specific VFS charts
 *
 * Create charts for cgroup/application.
 *
 * @param type the chart type.
 * @param em   the main thread structure.
 */
static void ebpf_create_specific_vfs_charts(char *type, ebpf_module_t *em)
{
    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_FILE_DELETED,"Files deleted",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_UNLINK_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5500,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_UNLINK],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS, "Write to disk",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_WRITE_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5501,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS_ERROR, "Fails to write",
                          EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_WRITE_ERROR_CONTEXT,
                          NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5502,
                          ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);
    }

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_READ_CALLS, "Read from disk",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_READ_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5503,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_READ_CALLS_ERROR, "Fails to read",
                          EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_READ_ERROR_CONTEXT,
                          NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5504,
                          ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);
    }

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_WRITE_BYTES, "Bytes written on disk",
                      EBPF_COMMON_DIMENSION_BYTES, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_WRITE_BYTES_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5505,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_READ_BYTES, "Bytes read from disk",
                      EBPF_COMMON_DIMENSION_BYTES, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_READ_BYTES_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5506,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_FSYNC, "Calls for <code>vfs_fsync</code>",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_FSYNC_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5507,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_FSYNC_CALLS_ERROR, "Sync error",
                          EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_FSYNC_ERROR_CONTEXT,
                          NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5508,
                          ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);
    }

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_OPEN, "Calls for <code>vfs_open</code>",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_OPEN_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5509,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_OPEN_CALLS_ERROR, "Open error",
                          EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_OPEN_ERROR_CONTEXT,
                          NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5510,
                          ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);
    }

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_CREATE, "Calls for <code>vfs_create</code>",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_CREATE_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5511,
                      ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(type, NETDATA_SYSCALL_APPS_VFS_CREATE_CALLS_ERROR, "Create error",
                          EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP, NETDATA_CGROUP_VFS_CREATE_ERROR_CONTEXT,
                          NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5512,
                          ebpf_create_global_dimension, &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_SWAP);
    }
}

/**
 * Obsolete specific VFS charts
 *
 * Obsolete charts for cgroup/application.
 *
 * @param type the chart type.
 * @param em   the main thread structure.
 */
static void ebpf_obsolete_specific_vfs_charts(char *type, ebpf_module_t *em)
{
    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_FILE_DELETED, "Files deleted",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_UNLINK_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5500, em->update_every);

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS, "Write to disk",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_WRITE_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5501, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS_ERROR, "Fails to write",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_WRITE_ERROR_CONTEXT,
                                  NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5502, em->update_every);
    }

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_READ_CALLS, "Read from disk",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_READ_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5503, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_READ_CALLS_ERROR, "Fails to read",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_READ_ERROR_CONTEXT,
                                  NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5504, em->update_every);
    }

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_WRITE_BYTES, "Bytes written on disk",
                              EBPF_COMMON_DIMENSION_BYTES, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_WRITE_BYTES_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5505, em->update_every);

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_READ_BYTES, "Bytes read from disk",
                              EBPF_COMMON_DIMENSION_BYTES, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_READ_BYTES_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5506, em->update_every);

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_FSYNC, "Calls for <code>vfs_fsync</code>",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_FSYNC_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5507, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_FSYNC_CALLS_ERROR, "Sync error",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_FSYNC_ERROR_CONTEXT,
                                  NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5508, em->update_every);
    }

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_OPEN, "Calls for <code>vfs_open</code>",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_OPEN_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5509, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_OPEN_CALLS_ERROR, "Open error",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_OPEN_ERROR_CONTEXT,
                                  NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5510, em->update_every);
    }

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_CREATE, "Calls for <code>vfs_create</code>",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_CREATE_CONTEXT,
                              NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5511, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_VFS_CREATE_CALLS_ERROR, "Create error",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_VFS_CREATE_ERROR_CONTEXT,
                                  NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5512, em->update_every);
    }
}

/*
 * Send specific VFS 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_vfs_data(char *type, netdata_publish_vfs_t *values, ebpf_module_t *em)
{
    write_begin_chart(type, NETDATA_SYSCALL_APPS_FILE_DELETED);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_UNLINK].name, (long long)values->unlink_call);
    write_end_chart();

    write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE].name,
                          (long long)values->write_call + (long long)values->writev_call);
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS_ERROR);
        write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE].name,
                              (long long)values->write_err + (long long)values->writev_err);
        write_end_chart();
    }

    write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_READ_CALLS);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ].name,
                          (long long)values->read_call + (long long)values->readv_call);
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_READ_CALLS_ERROR);
        write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ].name,
                              (long long)values->read_err + (long long)values->readv_err);
        write_end_chart();
    }

    write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_WRITE_BYTES);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_WRITE].name,
                          (long long)values->write_bytes + (long long)values->writev_bytes);
    write_end_chart();

    write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_READ_BYTES);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ].name,
                          (long long)values->read_bytes + (long long)values->readv_bytes);
    write_end_chart();

    write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_FSYNC);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC].name,
                          (long long)values->fsync_call);
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_FSYNC_CALLS_ERROR);
        write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC].name,
                              (long long)values->fsync_err);
        write_end_chart();
    }

    write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_OPEN);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN].name,
                          (long long)values->open_call);
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_OPEN_CALLS_ERROR);
        write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN].name,
                              (long long)values->open_err);
        write_end_chart();
    }

    write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_CREATE);
    write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE].name,
                          (long long)values->create_call);
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(type, NETDATA_SYSCALL_APPS_VFS_CREATE_CALLS_ERROR);
        write_chart_dimension(vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE].name,
                              (long long)values->create_err);
        write_end_chart();
    }
}

/**
 *  Create Systemd Socket Charts
 *
 *  Create charts when systemd is enabled
 *
 *  @param em the main collector structure
 **/
static void ebpf_create_systemd_vfs_charts(ebpf_module_t *em)
{
    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_FILE_DELETED, "Files deleted",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20065,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_UNLINK_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS, "Write to disk",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20066,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_WRITE_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS_ERROR, "Fails to write",
                                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                      NETDATA_EBPF_CHART_TYPE_STACKED, 20067,
                                      ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                                      NETDATA_SYSTEMD_VFS_WRITE_ERROR_CONTEXT,
                                      NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);
    }

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_READ_CALLS, "Read from disk",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20068,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_READ_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_READ_CALLS_ERROR, "Fails to read",
                                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                      NETDATA_EBPF_CHART_TYPE_STACKED, 20069,
                                      ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                                      NETDATA_SYSTEMD_VFS_READ_ERROR_CONTEXT,
                                      NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);
    }

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_WRITE_BYTES, "Bytes written on disk",
                                  EBPF_COMMON_DIMENSION_BYTES, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20070,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_WRITE_BYTES_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_READ_BYTES, "Bytes read from disk",
                                  EBPF_COMMON_DIMENSION_BYTES, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20071,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_READ_BYTES_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_FSYNC, "Calls to <code>vfs_fsync</code>",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20072,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_FSYNC_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_FSYNC_CALLS_ERROR, "Sync error",
                                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                      NETDATA_EBPF_CHART_TYPE_STACKED, 20073,
                                      ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_FSYNC_ERROR_CONTEXT,
                                      NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);
    }
    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_OPEN, "Calls to <code>vfs_open</code>",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20074,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_OPEN_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_OPEN_CALLS_ERROR, "Open error",
                                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                      NETDATA_EBPF_CHART_TYPE_STACKED, 20075,
                                      ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_OPEN_ERROR_CONTEXT,
                                      NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);
    }

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_CREATE, "Calls to <code>vfs_create</code>",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20076,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_CREATE_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_VFS_CREATE_CALLS_ERROR, "Create error",
                                      EBPF_COMMON_DIMENSION_CALL, NETDATA_VFS_CGROUP_GROUP,
                                      NETDATA_EBPF_CHART_TYPE_STACKED, 20077,
                                      ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_VFS_CREATE_ERROR_CONTEXT,
                                      NETDATA_EBPF_MODULE_NAME_VFS, em->update_every);
    }
}

/**
 * Send Systemd charts
 *
 * Send collected data to Netdata.
 *
 *  @param em the main collector structure
 *
 *  @return It returns the status for chart creation, if it is necessary to remove a specific dimension, zero is returned
 *          otherwise function returns 1 to avoid chart recreation
 */
static int ebpf_send_systemd_vfs_charts(ebpf_module_t *em)
{
    int ret = 1;
    ebpf_cgroup_target_t *ect;
    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_FILE_DELETED);
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_vfs.unlink_call);
        } else if (unlikely(ect->systemd))
            ret = 0;
    }
    write_end_chart();

    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS);
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_vfs.write_call +
            ect->publish_systemd_vfs.writev_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS_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_vfs.write_err +
                ect->publish_systemd_vfs.writev_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_READ_CALLS);
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_vfs.read_call +
            ect->publish_systemd_vfs.readv_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_READ_CALLS_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_vfs.read_err +
                ect->publish_systemd_vfs.readv_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_WRITE_BYTES);
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_vfs.write_bytes +
            ect->publish_systemd_vfs.writev_bytes);
        }
    }
    write_end_chart();


    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_READ_BYTES);
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_vfs.read_bytes +
            ect->publish_systemd_vfs.readv_bytes);
        }
    }
    write_end_chart();

    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_FSYNC);
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_vfs.fsync_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_FSYNC_CALLS_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_vfs.fsync_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_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_vfs.open_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_OPEN_CALLS_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_vfs.open_err);
            }
        }
        write_end_chart();
    }

    write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_CREATE);
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_vfs.create_call);
        }
    }
    write_end_chart();

    if (em->mode < MODE_ENTRY) {
        write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_VFS_CREATE_CALLS_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_vfs.create_err);
            }
        }
        write_end_chart();
    }

    return ret;
}

/**
 * Send data to Netdata calling auxiliary functions.
 *
 * @param em the main collector structure
*/
static void ebpf_vfs_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_vfs_sum_cgroup_pids(&ect->publish_systemd_vfs, ect->pids);
    }

    int has_systemd = shm_ebpf_cgroup.header->systemd_enabled;
    if (has_systemd) {
        static int systemd_charts = 0;
        if (!systemd_charts) {
            ebpf_create_systemd_vfs_charts(em);
            systemd_charts = 1;
        }

        systemd_charts = ebpf_send_systemd_vfs_charts(em);
    }

    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (ect->systemd)
            continue;

        if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_VFS_CHART) && ect->updated) {
            ebpf_create_specific_vfs_charts(ect->name, em);
            ect->flags |= NETDATA_EBPF_CGROUP_HAS_VFS_CHART;
        }

        if (ect->flags & NETDATA_EBPF_CGROUP_HAS_VFS_CHART) {
            if (ect->updated) {
                ebpf_send_specific_vfs_data(ect->name, &ect->publish_systemd_vfs, em);
            } else {
                ebpf_obsolete_specific_vfs_charts(ect->name, em);
                ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_VFS_CHART;
            }
        }
    }

    pthread_mutex_unlock(&mutex_cgroup_shm);
}

/**
 * Main loop for this collector.
 *
 * @param step the number of microseconds used with heart beat
 * @param em   the structure with thread information
 */
static void vfs_collector(ebpf_module_t *em)
{
    vfs_threads.thread = mallocz(sizeof(netdata_thread_t));
    vfs_threads.start_routine = ebpf_vfs_read_hash;

    netdata_thread_create(vfs_threads.thread, vfs_threads.name, NETDATA_THREAD_OPTION_DEFAULT,
                          ebpf_vfs_read_hash, em);

    int cgroups = em->cgroup_charts;
    heartbeat_t hb;
    heartbeat_init(&hb);
    usec_t step = em->update_every * USEC_PER_SEC;
    while (!ebpf_exit_plugin) {
        (void)heartbeat_next(&hb, step);
        if (ebpf_exit_plugin)
            break;

        netdata_apps_integration_flags_t apps = em->apps_charts;
        pthread_mutex_lock(&collect_data_mutex);
        if (apps)
            ebpf_vfs_read_apps();

        if (cgroups)
            read_update_vfs_cgroup();

        pthread_mutex_lock(&lock);

        ebpf_vfs_send_data(em);
        fflush(stdout);

        if (apps & NETDATA_EBPF_APPS_FLAG_CHART_CREATED)
            ebpf_vfs_send_apps_data(em, apps_groups_root_target);

        if (cgroups)
            ebpf_vfs_send_cgroup_data(em);

        pthread_mutex_unlock(&lock);
        pthread_mutex_unlock(&collect_data_mutex);
    }
}

/*****************************************************************
 *
 *  FUNCTIONS TO CREATE CHARTS
 *
 *****************************************************************/

/**
 * Create IO chart
 *
 * @param family the chart family
 * @param name   the chart name
 * @param axis   the axis label
 * @param web    the group name used to attach the chart on dashboard
 * @param order  the order number of the specified chart
 * @param algorithm the algorithm used to make the charts.
 * @param update_every value to overwrite the update frequency set by the server.
 */
static void ebpf_create_io_chart(char *family, char *name, char *axis, char *web,
                                 int order, int algorithm, int update_every)
{
    printf("CHART %s.%s '' 'Bytes written and read' '%s' '%s' '' line %d %d '' 'ebpf.plugin' 'filesystem'\n",
           family,
           name,
           axis,
           web,
           order,
           update_every);

    printf("DIMENSION %s %s %s 1 1\n",
           vfs_id_names[NETDATA_KEY_PUBLISH_VFS_READ],
           vfs_dimension_names[NETDATA_KEY_PUBLISH_VFS_READ],
           ebpf_algorithms[algorithm]);
    printf("DIMENSION %s %s %s -1 1\n",
           vfs_id_names[NETDATA_KEY_PUBLISH_VFS_WRITE],
           vfs_dimension_names[NETDATA_KEY_PUBLISH_VFS_WRITE],
           ebpf_algorithms[algorithm]);
}

/**
 * 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_global_charts(ebpf_module_t *em)
{
    ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                      NETDATA_VFS_FILE_CLEAN_COUNT,
                      "Remove files",
                      EBPF_COMMON_DIMENSION_CALL,
                      NETDATA_VFS_GROUP,
                      NULL,
                      NETDATA_EBPF_CHART_TYPE_LINE,
                      NETDATA_CHART_PRIO_FILESYSTEM_VFS_CLEAN,
                      ebpf_create_global_dimension,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_UNLINK],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                      NETDATA_VFS_FILE_IO_COUNT,
                      "Calls to IO",
                      EBPF_COMMON_DIMENSION_CALL,
                      NETDATA_VFS_GROUP,
                      NULL,
                      NETDATA_EBPF_CHART_TYPE_LINE,
                      NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_COUNT,
                      ebpf_create_global_dimension,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ],
                      2, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    ebpf_create_io_chart(NETDATA_FILESYSTEM_FAMILY,
                         NETDATA_VFS_IO_FILE_BYTES, EBPF_COMMON_DIMENSION_BYTES,
                         NETDATA_VFS_GROUP,
                         NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_BYTES,
                         NETDATA_EBPF_INCREMENTAL_IDX, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                          NETDATA_VFS_FILE_ERR_COUNT,
                          "Fails to write or read",
                          EBPF_COMMON_DIMENSION_CALL,
                          NETDATA_VFS_GROUP,
                          NULL,
                          NETDATA_EBPF_CHART_TYPE_LINE,
                          NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_EBYTES,
                          ebpf_create_global_dimension,
                          &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_READ],
                          2, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                      NETDATA_VFS_FSYNC,
                      "Calls for <code>vfs_fsync</code>",
                      EBPF_COMMON_DIMENSION_CALL,
                      NETDATA_VFS_GROUP,
                      NULL,
                      NETDATA_EBPF_CHART_TYPE_LINE,
                      NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_FSYNC,
                      ebpf_create_global_dimension,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                          NETDATA_VFS_FSYNC_ERR,
                          "Fails to synchronize",
                          EBPF_COMMON_DIMENSION_CALL,
                          NETDATA_VFS_GROUP,
                          NULL,
                          NETDATA_EBPF_CHART_TYPE_LINE,
                          NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_EFSYNC,
                          ebpf_create_global_dimension,
                          &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_FSYNC],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                      NETDATA_VFS_OPEN,
                      "Calls for <code>vfs_open</code>",
                      EBPF_COMMON_DIMENSION_CALL,
                      NETDATA_VFS_GROUP,
                      NULL,
                      NETDATA_EBPF_CHART_TYPE_LINE,
                      NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_OPEN,
                      ebpf_create_global_dimension,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                          NETDATA_VFS_OPEN_ERR,
                          "Fails to open a file",
                          EBPF_COMMON_DIMENSION_CALL,
                          NETDATA_VFS_GROUP,
                          NULL,
                          NETDATA_EBPF_CHART_TYPE_LINE,
                          NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_EOPEN,
                          ebpf_create_global_dimension,
                          &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_OPEN],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                      NETDATA_VFS_CREATE,
                      "Calls for <code>vfs_create</code>",
                      EBPF_COMMON_DIMENSION_CALL,
                      NETDATA_VFS_GROUP,
                      NULL,
                      NETDATA_EBPF_CHART_TYPE_LINE,
                      NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_CREATE,
                      ebpf_create_global_dimension,
                      &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(NETDATA_FILESYSTEM_FAMILY,
                          NETDATA_VFS_CREATE_ERR,
                          "Fails to create a file.",
                          EBPF_COMMON_DIMENSION_CALL,
                          NETDATA_VFS_GROUP,
                          NULL,
                          NETDATA_EBPF_CHART_TYPE_LINE,
                          NETDATA_CHART_PRIO_FILESYSTEM_VFS_IO_ECREATE,
                          ebpf_create_global_dimension,
                          &vfs_publish_aggregated[NETDATA_KEY_PUBLISH_VFS_CREATE],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }
}

/**
 * Create process apps charts
 *
 * Call ebpf_create_chart to create the charts on apps submenu.
 *
 * @param em   a pointer to the structure with the default values.
 * @param ptr  a pointer for the targets.
 **/
void ebpf_vfs_create_apps_charts(struct ebpf_module *em, void *ptr)
{
    struct target *root = ptr;

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_FILE_DELETED,
                               "Files deleted",
                               EBPF_COMMON_DIMENSION_CALL,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20065,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS,
                               "Write to disk",
                               EBPF_COMMON_DIMENSION_CALL,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20066,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_WRITE_CALLS_ERROR,
                                   "Fails to write",
                                   EBPF_COMMON_DIMENSION_CALL,
                                   NETDATA_VFS_GROUP,
                                   NETDATA_EBPF_CHART_TYPE_STACKED,
                                   20067,
                                   ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                                   root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_READ_CALLS,
                               "Read from disk",
                               EBPF_COMMON_DIMENSION_CALL,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20068,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_READ_CALLS_ERROR,
                                   "Fails to read",
                                   EBPF_COMMON_DIMENSION_CALL,
                                   NETDATA_VFS_GROUP,
                                   NETDATA_EBPF_CHART_TYPE_STACKED,
                                   20069,
                                   ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                                   root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_WRITE_BYTES,
                               "Bytes written on disk", EBPF_COMMON_DIMENSION_BYTES,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20070,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_READ_BYTES,
                               "Bytes read from disk", EBPF_COMMON_DIMENSION_BYTES,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20071,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_FSYNC,
                               "Calls for <code>vfs_fsync</code>", EBPF_COMMON_DIMENSION_CALL,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20072,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_FSYNC_CALLS_ERROR,
                                   "Sync error",
                                   EBPF_COMMON_DIMENSION_CALL,
                                   NETDATA_VFS_GROUP,
                                   NETDATA_EBPF_CHART_TYPE_STACKED,
                                   20073,
                                   ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                                   root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_OPEN,
                               "Calls for <code>vfs_open</code>", EBPF_COMMON_DIMENSION_CALL,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20074,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_OPEN_CALLS_ERROR,
                                   "Open error",
                                   EBPF_COMMON_DIMENSION_CALL,
                                   NETDATA_VFS_GROUP,
                                   NETDATA_EBPF_CHART_TYPE_STACKED,
                                   20075,
                                   ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                                   root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_CREATE,
                               "Calls for <code>vfs_create</code>", EBPF_COMMON_DIMENSION_CALL,
                               NETDATA_VFS_GROUP,
                               NETDATA_EBPF_CHART_TYPE_STACKED,
                               20076,
                               ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                               root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_apps(NETDATA_SYSCALL_APPS_VFS_CREATE_CALLS_ERROR,
                                   "Create error",
                                   EBPF_COMMON_DIMENSION_CALL,
                                   NETDATA_VFS_GROUP,
                                   NETDATA_EBPF_CHART_TYPE_STACKED,
                                   20077,
                                   ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
                                   root, em->update_every, NETDATA_EBPF_MODULE_NAME_VFS);
    }

    em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED;
}

/*****************************************************************
 *
 *  FUNCTIONS TO START 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_vfs_allocate_global_vectors(int apps)
{
    memset(vfs_aggregated_data, 0, sizeof(vfs_aggregated_data));
    memset(vfs_publish_aggregated, 0, sizeof(vfs_publish_aggregated));

    vfs_hash_values = callocz(ebpf_nprocs, sizeof(netdata_idx_t));
    vfs_vector = callocz(ebpf_nprocs, sizeof(netdata_publish_vfs_t));

    if (apps)
        vfs_pid = callocz((size_t)pid_max, sizeof(netdata_publish_vfs_t *));
}

/*****************************************************************
 *
 *  EBPF VFS THREAD
 *
 *****************************************************************/

/**
 * Process thread
 *
 * Thread used to generate process charts.
 *
 * @param ptr a pointer to `struct ebpf_module`
 *
 * @return It always return NULL
 */
void *ebpf_vfs_thread(void *ptr)
{
    netdata_thread_cleanup_push(ebpf_vfs_exit, ptr);

    ebpf_module_t *em = (ebpf_module_t *)ptr;
    em->maps = vfs_maps;

    ebpf_update_pid_table(&vfs_maps[NETDATA_VFS_PID], em);

    ebpf_vfs_allocate_global_vectors(em->apps_charts);

    if (!em->enabled)
        goto endvfs;

    em->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &em->objects);
    if (!em->probe_links) {
        em->enabled = CONFIG_BOOLEAN_NO;
        goto endvfs;
    }

    int algorithms[NETDATA_KEY_PUBLISH_VFS_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(vfs_aggregated_data, vfs_publish_aggregated, vfs_dimension_names,
                       vfs_id_names, algorithms, NETDATA_KEY_PUBLISH_VFS_END);

    pthread_mutex_lock(&lock);
    ebpf_create_global_charts(em);
    ebpf_update_stats(&plugin_statistics, em);
    pthread_mutex_unlock(&lock);

    vfs_collector(em);

endvfs:
    if (!em->enabled)
        ebpf_update_disabled_plugin_stats(em);

    netdata_thread_cleanup_pop(1);
    return NULL;
}