1 files changed, 0 insertions, 392 deletions
diff --git a/collectors/ebpf.plugin/ebpf_cgroup.c b/collectors/ebpf.plugin/ebpf_cgroup.c
deleted file mode 100644
index 1aadfbaf..00000000
--- a/collectors/ebpf.plugin/ebpf_cgroup.c
+++ /dev/null
@@ -1,392 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#include <sys/resource.h>
-
-#include "ebpf.h"
-#include "ebpf_cgroup.h"
-
-ebpf_cgroup_target_t *ebpf_cgroup_pids = NULL;
-static void *ebpf_mapped_memory = NULL;
-int send_cgroup_chart = 0;
-
-// --------------------------------------------------------------------------------------------------------------------
-// Map shared memory
-
-/**
- * Map Shared Memory locally
- *
- * Map the shared memory for current process
- *
- * @param fd       file descriptor returned after shm_open was called.
- * @param length   length of the shared memory
- *
- * @return It returns a pointer to the region mapped on success and MAP_FAILED otherwise.
- */
-static inline void *ebpf_cgroup_map_shm_locally(int fd, size_t length)
-{
-    void *value;
-
-    value =  mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-    if (!value) {
-        netdata_log_error("Cannot map shared memory used between eBPF and cgroup, integration between processes won't happen");
-        close(shm_fd_ebpf_cgroup);
-        shm_fd_ebpf_cgroup = -1;
-        shm_unlink(NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME);
-    }
-
-    return value;
-}
-
-/**
- * Unmap Shared Memory
- *
- * Unmap shared memory used to integrate eBPF and cgroup plugin
- */
-void ebpf_unmap_cgroup_shared_memory()
-{
-    munmap(ebpf_mapped_memory, shm_ebpf_cgroup.header->body_length);
-}
-
-/**
- * Map cgroup shared memory
- *
- * Map cgroup shared memory from cgroup to plugin
- */
-void ebpf_map_cgroup_shared_memory()
-{
-    static int limit_try = 0;
-    static time_t next_try = 0;
-
-    if (shm_ebpf_cgroup.header || limit_try > NETDATA_EBPF_CGROUP_MAX_TRIES)
-        return;
-
-    time_t curr_time = time(NULL);
-    if (curr_time < next_try)
-        return;
-
-    limit_try++;
-    next_try = curr_time + NETDATA_EBPF_CGROUP_NEXT_TRY_SEC;
-
-    if (shm_fd_ebpf_cgroup < 0) {
-        shm_fd_ebpf_cgroup = shm_open(NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME, O_RDWR, 0660);
-        if (shm_fd_ebpf_cgroup < 0) {
-            if (limit_try == NETDATA_EBPF_CGROUP_MAX_TRIES)
-                netdata_log_error("Shared memory was not initialized, integration between processes won't happen.");
-
-            return;
-        }
-    }
-
-    // Map only header
-    void *mapped = (netdata_ebpf_cgroup_shm_header_t *) ebpf_cgroup_map_shm_locally(shm_fd_ebpf_cgroup,
-                                                                                   sizeof(netdata_ebpf_cgroup_shm_header_t));
-    if (unlikely(mapped == SEM_FAILED)) {
-        return;
-    }
-    netdata_ebpf_cgroup_shm_header_t *header = mapped;
-
-    size_t length =  header->body_length;
-
-    munmap(header, sizeof(netdata_ebpf_cgroup_shm_header_t));
-
-    if (length <= ((sizeof(netdata_ebpf_cgroup_shm_header_t) + sizeof(netdata_ebpf_cgroup_shm_body_t)))) {
-        return;
-    }
-
-    ebpf_mapped_memory = (void *)ebpf_cgroup_map_shm_locally(shm_fd_ebpf_cgroup, length);
-    if (unlikely(ebpf_mapped_memory == MAP_FAILED)) {
-        return;
-    }
-    shm_ebpf_cgroup.header = ebpf_mapped_memory;
-    shm_ebpf_cgroup.body = ebpf_mapped_memory + sizeof(netdata_ebpf_cgroup_shm_header_t);
-
-    shm_sem_ebpf_cgroup = sem_open(NETDATA_NAMED_SEMAPHORE_EBPF_CGROUP_NAME, O_CREAT, 0660, 1);
-
-    if (shm_sem_ebpf_cgroup == SEM_FAILED) {
-        netdata_log_error("Cannot create semaphore, integration between eBPF and cgroup won't happen");
-        limit_try = NETDATA_EBPF_CGROUP_MAX_TRIES + 1;
-        munmap(ebpf_mapped_memory, length);
-        shm_ebpf_cgroup.header = NULL;
-        shm_ebpf_cgroup.body = NULL;
-        close(shm_fd_ebpf_cgroup);
-        shm_fd_ebpf_cgroup = -1;
-        shm_unlink(NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME);
-    }
-}
-
-// --------------------------------------------------------------------------------------------------------------------
-// Close and Cleanup
-
-/**
- * Clean Specific cgroup pid
- *
- * Clean all PIDs associated with cgroup.
- *
- * @param pt structure pid on target that will have your PRs removed
- */
-static inline void ebpf_clean_specific_cgroup_pids(struct pid_on_target2 *pt)
-{
-    while (pt) {
-        struct pid_on_target2 *next_pid = pt->next;
-
-        freez(pt);
-        pt = next_pid;
-    }
-}
-
-/**
- * Remove Cgroup Update Target Update List
- *
- * Remove from cgroup target and update the link list
- */
-static void ebpf_remove_cgroup_target_update_list()
-{
-    ebpf_cgroup_target_t *next, *ect = ebpf_cgroup_pids;
-    ebpf_cgroup_target_t *prev = ebpf_cgroup_pids;
-    while (ect) {
-        next = ect->next;
-        if (!ect->updated) {
-            if (ect == ebpf_cgroup_pids) {
-                ebpf_cgroup_pids = next;
-                prev = next;
-            } else {
-                prev->next = next;
-            }
-
-            ebpf_clean_specific_cgroup_pids(ect->pids);
-            freez(ect);
-        } else {
-            prev = ect;
-        }
-
-        ect = next;
-    }
-}
-
-// --------------------------------------------------------------------------------------------------------------------
-// Fill variables
-
-/**
- * Set Target Data
- *
- * Set local variable values according shared memory information.
- *
- * @param out local output variable.
- * @param ptr input from shared memory.
- */
-static inline void ebpf_cgroup_set_target_data(ebpf_cgroup_target_t *out, netdata_ebpf_cgroup_shm_body_t *ptr)
-{
-    out->hash = ptr->hash;
-    snprintfz(out->name, 255, "%s", ptr->name);
-    out->systemd = ptr->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE;
-    out->updated = 1;
-}
-
-/**
- * Find or create
- *
- * Find the structure inside the link list or allocate and link when it is not present.
- *
- * @param ptr Input from shared memory.
- *
- * @return It returns a pointer for the structure associated with the input.
- */
-static ebpf_cgroup_target_t * ebpf_cgroup_find_or_create(netdata_ebpf_cgroup_shm_body_t *ptr)
-{
-    ebpf_cgroup_target_t *ect, *prev;
-    for (ect = ebpf_cgroup_pids, prev = ebpf_cgroup_pids; ect; prev = ect, ect = ect->next) {
-        if (ect->hash == ptr->hash && !strcmp(ect->name, ptr->name)) {
-            ect->updated = 1;
-            return ect;
-        }
-    }
-
-    ebpf_cgroup_target_t *new_ect = callocz(1, sizeof(ebpf_cgroup_target_t));
-
-    ebpf_cgroup_set_target_data(new_ect, ptr);
-    if (!ebpf_cgroup_pids) {
-        ebpf_cgroup_pids = new_ect;
-    } else {
-        prev->next = new_ect;
-    }
-
-    return new_ect;
-}
-
-/**
- * Update pid link list
- *
- * Update PIDs list associated with specific cgroup.
- *
- * @param ect  cgroup structure where pids will be stored
- * @param path file with PIDs associated to cgroup.
- */
-static void ebpf_update_pid_link_list(ebpf_cgroup_target_t *ect, char *path)
-{
-    procfile *ff = procfile_open_no_log(path, " \t:", PROCFILE_FLAG_DEFAULT);
-    if (!ff)
-        return;
-
-    ff = procfile_readall(ff);
-    if (!ff)
-        return;
-
-    size_t lines = procfile_lines(ff), l;
-    for (l = 0; l < lines ;l++) {
-        int pid = (int)str2l(procfile_lineword(ff, l, 0));
-        if (pid) {
-            struct pid_on_target2 *pt, *prev;
-            for (pt = ect->pids, prev = ect->pids; pt; prev = pt, pt = pt->next) {
-                if (pt->pid == pid)
-                    break;
-            }
-
-            if (!pt) {
-                struct pid_on_target2 *w = callocz(1, sizeof(struct pid_on_target2));
-                w->pid = pid;
-                if (!ect->pids)
-                    ect->pids = w;
-                else
-                    prev->next = w;
-            }
-        }
-    }
-
-    procfile_close(ff);
-}
-
-/**
- * Set remove var
- *
- * Set variable remove. If this variable is not reset, the structure will be removed from link list.
- */
-void ebpf_reset_updated_var()
- {
-     ebpf_cgroup_target_t *ect;
-     for (ect = ebpf_cgroup_pids; ect; ect = ect->next) {
-         ect->updated = 0;
-     }
- }
-
-/**
- * Parse cgroup shared memory
- *
- * This function is responsible to copy necessary data from shared memory to local memory.
- */
-void ebpf_parse_cgroup_shm_data()
-{
-    static int previous = 0;
-    if (!shm_ebpf_cgroup.header || shm_sem_ebpf_cgroup == SEM_FAILED)
-        return;
-
-    sem_wait(shm_sem_ebpf_cgroup);
-    int i, end = shm_ebpf_cgroup.header->cgroup_root_count;
-    if (end <= 0) {
-        sem_post(shm_sem_ebpf_cgroup);
-        return;
-    }
-
-    pthread_mutex_lock(&mutex_cgroup_shm);
-    ebpf_remove_cgroup_target_update_list();
-
-    ebpf_reset_updated_var();
-
-    for (i = 0; i < end; i++) {
-        netdata_ebpf_cgroup_shm_body_t *ptr = &shm_ebpf_cgroup.body[i];
-        if (ptr->enabled) {
-            ebpf_cgroup_target_t *ect =  ebpf_cgroup_find_or_create(ptr);
-            ebpf_update_pid_link_list(ect, ptr->path);
-        }
-    }
-    send_cgroup_chart = previous != shm_ebpf_cgroup.header->cgroup_root_count;
-    previous = shm_ebpf_cgroup.header->cgroup_root_count;
-    sem_post(shm_sem_ebpf_cgroup);
-    pthread_mutex_unlock(&mutex_cgroup_shm);
-#ifdef NETDATA_DEV_MODE
-    netdata_log_info("Updating cgroup %d (Previous: %d, Current: %d)",
-         send_cgroup_chart, previous, shm_ebpf_cgroup.header->cgroup_root_count);
-#endif
-
-    sem_post(shm_sem_ebpf_cgroup);
-}
-
-// --------------------------------------------------------------------------------------------------------------------
-// Create charts
-
-/**
- * Create charts on systemd submenu
- *
- * @param id   the chart id
- * @param title  the value displayed on vertical axis.
- * @param units  the value displayed on vertical axis.
- * @param family Submenu that the chart will be attached on dashboard.
- * @param charttype chart type
- * @param order  the chart order
- * @param algorithm the algorithm used by dimension
- * @param context   add context for chart
- * @param module    chart module name, this is the eBPF thread.
- * @param update_every value to overwrite the update frequency set by the server.
- */
-void ebpf_create_charts_on_systemd(char *id, char *title, char *units, char *family, char *charttype, int order,
-                                   char *algorithm, char *context, char *module, int update_every)
-{
-    ebpf_cgroup_target_t *w;
-    ebpf_write_chart_cmd(NETDATA_SERVICE_FAMILY, id, "", title, units, family, charttype, context,
-                         order, update_every, module);
-
-    for (w = ebpf_cgroup_pids; w; w = w->next) {
-        if (unlikely(w->systemd) && unlikely(w->updated))
-            fprintf(stdout, "DIMENSION %s '' %s 1 1\n", w->name, algorithm);
-    }
-}
-
-// --------------------------------------------------------------------------------------------------------------------
-// Cgroup main thread
-
-/**
- * CGROUP exit
- *
- * Clean up the main thread.
- *
- * @param ptr thread data.
- */
-static void ebpf_cgroup_exit(void *ptr)
-{
-    UNUSED(ptr);
-}
-
-/**
- * Cgroup integratin
- *
- * Thread responsible to call functions responsible to sync data between plugins.
- *
- * @param ptr It is a NULL value for this thread.
- *
- * @return It always returns NULL.
- */
-void *ebpf_cgroup_integration(void *ptr)
-{
-    netdata_thread_cleanup_push(ebpf_cgroup_exit, ptr);
-
-    usec_t step = USEC_PER_SEC;
-    int counter = NETDATA_EBPF_CGROUP_UPDATE - 1;
-    heartbeat_t hb;
-    heartbeat_init(&hb);
-    //Plugin will be killed when it receives a signal
-    while (!ebpf_plugin_exit) {
-        (void)heartbeat_next(&hb, step);
-
-        // We are using a small heartbeat time to wake up thread,
-        // but we should not update so frequently the shared memory data
-        if (++counter >=  NETDATA_EBPF_CGROUP_UPDATE) {
-            counter = 0;
-            if (!shm_ebpf_cgroup.header)
-                ebpf_map_cgroup_shared_memory();
-            else
-                ebpf_parse_cgroup_shm_data();
-        }
-    }
-
-    netdata_thread_cleanup_pop(1);
-    return NULL;
-}