Merging upstream version 1.32.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 231 insertions, 37 deletions

diff --git a/collectors/cgroups.plugin/cgroup-name.sh.in b/collectors/cgroups.plugin/cgroup-name.sh.in
index 8ef8ab58e..1f31c49a7 100755
--- a/collectors/cgroups.plugin/cgroup-name.sh.in
+++ b/collectors/cgroups.plugin/cgroup-name.sh.in
@@ -118,24 +118,37 @@ function add_lbl_prefix() {
 # pod level cgroup name format: 'pod_<namespace>_<pod_name>'
 # container level cgroup name format: 'cntr_<namespace>_<pod_name>_<container_name>'
 function k8s_get_kubepod_name() {
-  # GKE /sys/fs/cgroup/*/ tree:
+  # GKE /sys/fs/cgroup/*/ (cri=docker, cgroups=v1):
   # |-- kubepods
   # |   |-- burstable
   # |   |   |-- pod98cee708-023b-11eb-933d-42010a800193
   # |   |   |   |-- 922161c98e6ea450bf665226cdc64ca2aa3e889934c2cff0aec4325f8f78ac03
-  # |   |       `-- a5d223eec35e00f5a1c6fa3e3a5faac6148cdc1f03a2e762e873b7efede012d7
   # |   `-- pode314bbac-d577-11ea-a171-42010a80013b
   # |       |-- 7d505356b04507de7b710016d540b2759483ed5f9136bb01a80872b08f771930
-  # |       `-- 88ab4683b99cfa7cc8c5f503adf7987dd93a3faa7c4ce0d17d419962b3220d50
   #
-  # Minikube (v1.8.2) /sys/fs/cgroup/*/ tree:
+  # GKE /sys/fs/cgroup/*/ (cri=containerd, cgroups=v1):
+  # |-- kubepods.slice
+  # |   |-- kubepods-besteffort.slice
+  # |   |   |-- kubepods-besteffort-pode1465238_4518_4c21_832f_fd9f87033dad.slice
+  # |   |   |   |-- cri-containerd-66be9b2efdf4d85288c319b8c1a2f50d2439b5617e36f45d9d0d0be1381113be.scope
+  # |   `-- kubepods-pod91f5b561_369f_4103_8015_66391059996a.slice
+  # |       |-- cri-containerd-24c53b774a586f06abc058619b47f71d9d869ac50c92898adbd199106fd0aaeb.scope
+  #
+  # GKE /sys/fs/cgroup/*/ (cri=crio, cgroups=v1):
+  # |-- kubepods.slice
+  # |   |-- kubepods-besteffort.slice
+  # |   |   |-- kubepods-besteffort-podad412dfe_3589_4056_965a_592356172968.slice
+  # |   |   |   |-- crio-77b019312fd9825828b70214b2c94da69c30621af2a7ee06f8beace4bc9439e5.scope
+  #
+  # Minikube (v1.8.2) /sys/fs/cgroup/*/ (cri=docker, cgroups=v1):
   # |-- kubepods.slice
   # |   |-- kubepods-besteffort.slice
   # |   |   |-- kubepods-besteffort-pod10fb5647_c724_400c_b9cc_0e6eae3110e7.slice
   # |   |   |   |-- docker-36e5eb5056dfdf6dbb75c0c44a1ecf23217fe2c50d606209d8130fcbb19fb5a7.scope
-  # |   |   |   `-- docker-87e18c2323621cf0f635c53c798b926e33e9665c348c60d489eef31ee1bd38d7.scope
   #
-  # NOTE: cgroups plugin uses '_' to join dir names, so it is <parent>_<child>_<child>_...
+  # NOTE: cgroups plugin
+  # - uses '_' to join dir names (so it is <parent>_<child>_<child>_...)
+  # - replaces '.' with '-'
 
   local fn="${FUNCNAME[0]}"
   local id="${1}"
@@ -157,9 +170,9 @@ function k8s_get_kubepod_name() {
     # kubepods_kubepods-<QOS_CLASS>
     name=${clean_id//-/_}
     name=${name/#kubepods_kubepods/kubepods}
-  elif [[ $clean_id =~ .+pod[a-f0-9_-]+_docker-([a-f0-9]+)$ ]]; then
-    # ...pod<POD_UID>_docker-<CONTAINER_ID> (POD_UID w/ "_")
-    cntr_id=${BASH_REMATCH[1]}
+  elif [[ $clean_id =~ .+pod[a-f0-9_-]+_(docker|crio|cri-containerd)-([a-f0-9]+)$ ]]; then
+    # ...pod<POD_UID>_(docker|crio|cri-containerd)-<CONTAINER_ID> (POD_UID w/ "_")
+    cntr_id=${BASH_REMATCH[2]}
   elif [[ $clean_id =~ .+pod[a-f0-9-]+_([a-f0-9]+)$ ]]; then
     # ...pod<POD_UID>_<CONTAINER_ID>
     cntr_id=${BASH_REMATCH[1]}
@@ -252,7 +265,7 @@ function k8s_get_kubepod_name() {
   jq_filter+='container_name=\"\(.name)\",'
   jq_filter+='container_id=\"\(.containerID)\"'
   jq_filter+='") | '
-  jq_filter+='sub("docker://";"")' # containerID: docker://a346da9bc0e3eaba6b295f64ac16e02f2190db2cef570835706a9e7a36e2c722
+  jq_filter+='sub("(docker|cri-o|containerd)://";"")' # containerID: docker://a346da9bc0e3eaba6b295f64ac16e02f2190db2cef570835706a9e7a36e2c722
 
   local containers
   if ! containers=$(jq -r "${jq_filter}" <<< "$pods" 2>&1); then
diff --git a/collectors/cgroups.plugin/cgroup-network-helper.sh b/collectors/cgroups.plugin/cgroup-network-helper.sh
index 1b60f452a..f355480b8 100755
--- a/collectors/cgroups.plugin/cgroup-network-helper.sh
+++ b/collectors/cgroups.plugin/cgroup-network-helper.sh
@@ -76,7 +76,7 @@ debug() {
 
 pid=
 cgroup=
-while [ ! -z "${1}" ]
+while [ -n "${1}" ]
 do
     case "${1}" in
         --cgroup) cgroup="${2}"; shift 1;;
@@ -164,7 +164,7 @@ virsh_find_all_interfaces_for_cgroup() {
     # shellcheck disable=SC2230
     virsh="$(which virsh 2>/dev/null || command -v virsh 2>/dev/null)"
 
-    if [ ! -z "${virsh}" ]
+    if [ -n "${virsh}" ]
     then
         local d
         d="$(virsh_cgroup_to_domain_name "${c}")"
@@ -172,7 +172,7 @@ virsh_find_all_interfaces_for_cgroup() {
         # e.g.: vm01\x2dweb => vm01-web (https://github.com/netdata/netdata/issues/11088#issuecomment-832618149)
         d="$(printf '%b' "${d}")"
 
-        if [ ! -z "${d}" ]
+        if [ -n "${d}" ]
         then
             debug "running: virsh domiflist ${d}; to find the network interfaces"
 
@@ -203,8 +203,11 @@ netnsid_find_all_interfaces_for_pid() {
     local pid="${1}"
     [ -z "${pid}" ] && return 1
 
-    local nsid=$(lsns -t net -p ${pid} -o NETNSID -nr)
-    [ -z "${nsid}" -o "${nsid}" = "unassigned" ] && return 1
+    local nsid
+    nsid=$(lsns -t net -p "${pid}" -o NETNSID -nr 2>/dev/null)
+    if [ -z "${nsid}" ] || [ "${nsid}" = "unassigned" ]; then
+      return 1
+    fi
 
     set_source "netnsid"
     ip link show |\
@@ -234,14 +237,14 @@ netnsid_find_all_interfaces_for_cgroup() {
 find_all_interfaces_of_pid_or_cgroup() {
     local p="${1}" c="${2}" # the pid and the cgroup path
 
-    if [ ! -z "${pid}" ]
+    if [ -n "${pid}" ]
     then
         # we have been called with a pid
 
         proc_pid_fdinfo_iff "${p}"
         netnsid_find_all_interfaces_for_pid "${p}"
 
-    elif [ ! -z "${c}" ]
+    elif [ -n "${c}" ]
     then
         # we have been called with a cgroup
 
diff --git a/collectors/cgroups.plugin/sys_fs_cgroup.c b/collectors/cgroups.plugin/sys_fs_cgroup.c
index eea4d9ae7..92aa22c77 100644
--- a/collectors/cgroups.plugin/sys_fs_cgroup.c
+++ b/collectors/cgroups.plugin/sys_fs_cgroup.c
@@ -94,6 +94,11 @@ static struct cgroups_systemd_config_setting cgroups_systemd_options[] = {
     { .name = NULL,      .setting = SYSTEMD_CGROUP_ERR     },
 };
 
+// Shared memory with information from detected cgroups
+netdata_ebpf_cgroup_shm_t shm_cgroup_ebpf = {NULL, NULL};
+static int shm_fd_cgroup_ebpf = -1;
+sem_t *shm_mutex_cgroup_ebpf = SEM_FAILED;
+
 /* on Fed systemd is not in PATH for some reason */
 #define SYSTEMD_CMD_RHEL "/usr/lib/systemd/systemd --version"
 #define SYSTEMD_HIERARCHY_STRING "default-hierarchy="
@@ -168,8 +173,6 @@ static enum cgroups_type cgroups_try_detect_version()
     if (!statfs(filename, &fsinfo)) {
         if (fsinfo.f_type == CGROUP2_SUPER_MAGIC)
             return CGROUPS_V2;
-        if (fsinfo.f_type == CGROUP_SUPER_MAGIC)
-            return CGROUPS_V1;
     }
 #endif
 
@@ -463,6 +466,61 @@ void read_cgroup_plugin_configuration() {
     mountinfo_free_all(root);
 }
 
+void netdata_cgroup_ebpf_set_values(size_t length)
+{
+    sem_wait(shm_mutex_cgroup_ebpf);
+
+    shm_cgroup_ebpf.header->cgroup_max = cgroup_root_max;
+    shm_cgroup_ebpf.header->systemd_enabled = cgroup_enable_systemd_services |
+                                              cgroup_enable_systemd_services_detailed_memory |
+                                              cgroup_used_memory;
+    shm_cgroup_ebpf.header->body_length = length;
+
+    sem_post(shm_mutex_cgroup_ebpf);
+}
+
+void netdata_cgroup_ebpf_initialize_shm()
+{
+    shm_fd_cgroup_ebpf = shm_open(NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME, O_CREAT | O_RDWR, 0660);
+    if (shm_fd_cgroup_ebpf < 0) {
+        error("Cannot initialize shared memory used by cgroup and eBPF, integration won't happen.");
+        return;
+    }
+
+    size_t length = sizeof(netdata_ebpf_cgroup_shm_header_t) + cgroup_root_max * sizeof(netdata_ebpf_cgroup_shm_body_t);
+    if (ftruncate(shm_fd_cgroup_ebpf, length)) {
+        error("Cannot set size for shared memory.");
+        goto end_init_shm;
+    }
+
+    shm_cgroup_ebpf.header = (netdata_ebpf_cgroup_shm_header_t *) mmap(NULL, length,
+                                                                       PROT_READ | PROT_WRITE, MAP_SHARED,
+                                                                       shm_fd_cgroup_ebpf, 0);
+
+    if (!shm_cgroup_ebpf.header) {
+        error("Cannot map shared memory used between cgroup and eBPF, integration won't happen");
+        goto end_init_shm;
+    }
+    shm_cgroup_ebpf.body = (netdata_ebpf_cgroup_shm_body_t *) ((char *)shm_cgroup_ebpf.header +
+                                                              sizeof(netdata_ebpf_cgroup_shm_header_t));
+
+    shm_mutex_cgroup_ebpf = sem_open(NETDATA_NAMED_SEMAPHORE_EBPF_CGROUP_NAME, O_CREAT,
+                                     S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, 1);
+
+    if (shm_mutex_cgroup_ebpf != SEM_FAILED) {
+        netdata_cgroup_ebpf_set_values(length);
+        return;
+    }
+
+    error("Cannot create semaphore, integration between eBPF and cgroup won't happen");
+    munmap(shm_cgroup_ebpf.header, length);
+
+end_init_shm:
+    close(shm_fd_cgroup_ebpf);
+    shm_fd_cgroup_ebpf = -1;
+    shm_unlink(NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME);
+}
+
 // ----------------------------------------------------------------------------
 // cgroup objects
 
@@ -597,10 +655,6 @@ struct cgroup_network_interface {
     struct cgroup_network_interface *next;
 };
 
-#define CGROUP_OPTIONS_DISABLED_DUPLICATE   0x00000001
-#define CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE 0x00000002
-#define CGROUP_OPTIONS_IS_UNIFIED           0x00000004
-
 // *** WARNING *** The fields are not thread safe. Take care of safe usage.
 struct cgroup {
     uint32_t options;
@@ -609,6 +663,7 @@ struct cgroup {
     char enabled;        // enabled in the config
 
     char pending_renames;
+    char *intermediate_id; // TODO: remove it when the renaming script is fixed
 
     char *id;
     uint32_t hash;
@@ -1313,13 +1368,16 @@ static inline char *cgroup_chart_id_strdupz(const char *s) {
     char *r = strdupz(s);
     netdata_fix_chart_id(r);
 
+    return r;
+}
+
+// TODO: move the code to cgroup_chart_id_strdupz() when the renaming script is fixed
+static inline void substitute_dots_in_id(char *s) {
     // dots are used to distinguish chart type and id in streaming, so we should replace them
-    for (char *d = r; *d; d++) {
+    for (char *d = s; *d; d++) {
         if (*d == '.')
             *d = '-';
     }
-
-    return r;
 }
 
 char *parse_k8s_data(struct label **labels, char *data)
@@ -1357,7 +1415,8 @@ static inline void cgroup_get_chart_name(struct cgroup *cg) {
     pid_t cgroup_pid;
     char command[CGROUP_CHARTID_LINE_MAX + 1];
 
-    snprintfz(command, CGROUP_CHARTID_LINE_MAX, "exec %s '%s'", cgroups_rename_script, cg->chart_id);
+    // TODO: use cg->id when the renaming script is fixed
+    snprintfz(command, CGROUP_CHARTID_LINE_MAX, "exec %s '%s'", cgroups_rename_script, cg->intermediate_id);
 
     debug(D_CGROUP, "executing command \"%s\" for cgroup '%s'", command, cg->chart_id);
     FILE *fp = mypopen(command, &cgroup_pid);
@@ -1394,6 +1453,7 @@ static inline void cgroup_get_chart_name(struct cgroup *cg) {
 
                     freez(cg->chart_id);
                     cg->chart_id = cgroup_chart_id_strdupz(name);
+                    substitute_dots_in_id(cg->chart_id);
                     cg->hash_chart = simple_hash(cg->chart_id);
                 }
             }
@@ -1420,7 +1480,10 @@ static inline struct cgroup *cgroup_add(const char *id) {
 
     cg->chart_title = cgroup_title_strdupz(id);
 
+    cg->intermediate_id = cgroup_chart_id_strdupz(id);
+
     cg->chart_id = cgroup_chart_id_strdupz(id);
+    substitute_dots_in_id(cg->chart_id);
     cg->hash_chart = simple_hash(cg->chart_id);
 
     if(cgroup_use_unified_cgroups) cg->options |= CGROUP_OPTIONS_IS_UNIFIED;
@@ -1461,10 +1524,6 @@ static inline struct cgroup *cgroup_add(const char *id) {
             strncpy(buffer, cg->id, CGROUP_CHARTID_LINE_MAX);
             char *s = buffer;
 
-            //freez(cg->chart_id);
-            //cg->chart_id = cgroup_chart_id_strdupz(s);
-            //cg->hash_chart = simple_hash(cg->chart_id);
-
             // skip to the last slash
             size_t len = strlen(s);
             while(len--) if(unlikely(s[len] == '/')) break;
@@ -1588,6 +1647,7 @@ static inline void cgroup_free(struct cgroup *cg) {
     free_pressure(&cg->memory_pressure);
 
     freez(cg->id);
+    freez(cg->intermediate_id);
     freez(cg->chart_id);
     freez(cg->chart_title);
 
@@ -2056,6 +2116,69 @@ static inline void copy_discovered_cgroups()
     cgroup_root = discovered_cgroup_root;
 }
 
+static void is_there_cgroup_procs(netdata_ebpf_cgroup_shm_body_t *out, char *id)
+{
+    struct stat buf;
+
+    snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_cpuset_base, id);
+    if (likely(stat(out->path, &buf) == 0)) {
+        return;
+    }
+
+    snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_blkio_base, id);
+    if (likely(stat(out->path, &buf) == 0)) {
+        return;
+    }
+
+    snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_memory_base, id);
+    if (likely(stat(out->path, &buf) == 0)) {
+        return;
+    }
+
+    snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_devices_base, id);
+    if (likely(stat(out->path, &buf) == 0)) {
+        return;
+    }
+
+    out->path[0] = '\0';
+    out->enabled = 0;
+}
+
+static inline void share_cgroups()
+{
+    struct cgroup *cg;
+    int count;
+    struct stat buf;
+
+    if (shm_mutex_cgroup_ebpf == SEM_FAILED) {
+        return;
+    }
+    sem_wait(shm_mutex_cgroup_ebpf);
+
+    for (cg = cgroup_root, count = 0; cg ; cg = cg->next, count++) {
+        netdata_ebpf_cgroup_shm_body_t *ptr = &shm_cgroup_ebpf.body[count];
+        char *prefix = (cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE) ? "" : "cgroup_";
+        snprintfz(ptr->name, CGROUP_EBPF_NAME_SHARED_LENGTH - 1, "%s%s", prefix, cg->chart_title);
+        ptr->hash = simple_hash(ptr->name);
+        ptr->options = cg->options;
+        ptr->enabled = cg->enabled;
+        if (cgroup_use_unified_cgroups) {
+            snprintfz(ptr->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_unified_base, cg->id);
+            if (likely(stat(ptr->path, &buf) == -1)) {
+                ptr->path[0] = '\0';
+                ptr->enabled = 0;
+            }
+        } else {
+            is_there_cgroup_procs(ptr, cg->id);
+        }
+
+        debug(D_CGROUP, "cgroup shared: NAME=%s, ENABLED=%d", ptr->name, ptr->enabled);
+    }
+
+    shm_cgroup_ebpf.header->cgroup_root_count = count;
+    sem_post(shm_mutex_cgroup_ebpf);
+}
+
 static inline void find_all_cgroups() {
     debug(D_CGROUP, "searching for cgroups");
 
@@ -2112,6 +2235,8 @@ static inline void find_all_cgroups() {
     copy_discovered_cgroups();
     uv_mutex_unlock(&cgroup_root_mutex);
 
+    share_cgroups();
+
     debug(D_CGROUP, "done searching for cgroups");
 }
 
@@ -2743,7 +2868,7 @@ void update_systemd_services_charts(
             if(unlikely(!cg->rd_mem_detailed_rss))
                 cg->rd_mem_detailed_rss = rrddim_add(st_mem_detailed_rss, cg->chart_id, cg->chart_title, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
 
-            rrddim_set_by_pointer(st_mem_detailed_rss, cg->rd_mem_detailed_rss, cg->memory.total_rss + cg->memory.total_rss_huge);
+            rrddim_set_by_pointer(st_mem_detailed_rss, cg->rd_mem_detailed_rss, cg->memory.total_rss);
 
             if(unlikely(!cg->rd_mem_detailed_mapped))
                 cg->rd_mem_detailed_mapped = rrddim_add(st_mem_detailed_mapped, cg->chart_id, cg->chart_title, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
@@ -2792,7 +2917,15 @@ void update_systemd_services_charts(
             if(unlikely(!cg->rd_swap_usage))
                 cg->rd_swap_usage = rrddim_add(st_swap_usage, cg->chart_id, cg->chart_title, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
 
-            rrddim_set_by_pointer(st_swap_usage, cg->rd_swap_usage, cg->memory.msw_usage_in_bytes);
+            if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
+                rrddim_set_by_pointer(
+                    st_swap_usage,
+                    cg->rd_swap_usage,
+                    cg->memory.msw_usage_in_bytes > (cg->memory.usage_in_bytes + cg->memory.total_inactive_file) ?
+                        cg->memory.msw_usage_in_bytes - (cg->memory.usage_in_bytes + cg->memory.total_inactive_file) : 0);
+            } else {
+                rrddim_set_by_pointer(st_swap_usage, cg->rd_swap_usage, cg->memory.msw_usage_in_bytes);
+            }
         }
 
         if(likely(do_io && cg->io_service_bytes.updated)) {
@@ -3482,8 +3615,8 @@ void update_cgroup_charts(int update_every) {
                 rrddim_set(
                     cg->st_mem_usage,
                     "swap",
-                    (cg->memory.msw_usage_in_bytes > cg->memory.usage_in_bytes) ?
-                        cg->memory.msw_usage_in_bytes - cg->memory.usage_in_bytes : 0);
+                    cg->memory.msw_usage_in_bytes > (cg->memory.usage_in_bytes + cg->memory.total_inactive_file) ?
+                        cg->memory.msw_usage_in_bytes - (cg->memory.usage_in_bytes + cg->memory.total_inactive_file) : 0);
             } else {
                 rrddim_set(cg->st_mem_usage, "swap", cg->memory.msw_usage_in_bytes);
             }
@@ -4022,6 +4155,18 @@ static void cgroup_main_cleanup(void *ptr) {
         sleep_usec(step);
     }
 
+    if (shm_mutex_cgroup_ebpf != SEM_FAILED) {
+        sem_close(shm_mutex_cgroup_ebpf);
+    }
+
+    if (shm_cgroup_ebpf.header) {
+        munmap(shm_cgroup_ebpf.header, shm_cgroup_ebpf.header->body_length);
+    }
+
+    if (shm_fd_cgroup_ebpf > 0) {
+        close(shm_fd_cgroup_ebpf);
+    }
+
     static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
 }
 
@@ -4034,6 +4179,7 @@ void *cgroups_main(void *ptr) {
     int vdo_cpu_netdata = config_get_boolean("plugin:cgroups", "cgroups plugin resource charts", 1);
 
     read_cgroup_plugin_configuration();
+    netdata_cgroup_ebpf_initialize_shm();
 
     RRDSET *stcpu_thread = NULL;
 
@@ -4057,7 +4203,7 @@ void *cgroups_main(void *ptr) {
 
     int error = uv_thread_create(&discovery_thread.thread, cgroup_discovery_worker, NULL);
     if (error) {
-        error("CGROUP: cannot create tread worker. uv_thread_create(): %s", uv_strerror(error));
+        error("CGROUP: cannot create thread worker. uv_thread_create(): %s", uv_strerror(error));
         goto exit;
     }
     uv_thread_set_name_np(discovery_thread.thread, "PLUGIN[cgroups]");
diff --git a/collectors/cgroups.plugin/sys_fs_cgroup.h b/collectors/cgroups.plugin/sys_fs_cgroup.h
index 155330ff1..017aa8fb5 100644
--- a/collectors/cgroups.plugin/sys_fs_cgroup.h
+++ b/collectors/cgroups.plugin/sys_fs_cgroup.h
@@ -3,7 +3,7 @@
 #ifndef NETDATA_SYS_FS_CGROUP_H
 #define NETDATA_SYS_FS_CGROUP_H 1
 
-#include "../../daemon/common.h"
+#include "daemon/common.h"
 
 #if (TARGET_OS == OS_LINUX)
 
@@ -20,6 +20,38 @@
 
 extern void *cgroups_main(void *ptr);
 
+#define CGROUP_OPTIONS_DISABLED_DUPLICATE   0x00000001
+#define CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE 0x00000002
+#define CGROUP_OPTIONS_IS_UNIFIED           0x00000004
+
+typedef struct netdata_ebpf_cgroup_shm_header {
+    int cgroup_root_count;
+    int cgroup_max;
+    int systemd_enabled;
+    int __pad;
+    size_t body_length;
+} netdata_ebpf_cgroup_shm_header_t;
+
+#define CGROUP_EBPF_NAME_SHARED_LENGTH 256
+
+typedef struct netdata_ebpf_cgroup_shm_body {
+    // Considering what is exposed in this link https://en.wikipedia.org/wiki/Comparison_of_file_systems#Limits
+    // this length is enough to store what we want.
+    char name[CGROUP_EBPF_NAME_SHARED_LENGTH];
+    uint32_t hash;
+    uint32_t options;
+    int enabled;
+    char path[FILENAME_MAX + 1];
+} netdata_ebpf_cgroup_shm_body_t;
+
+typedef struct netdata_ebpf_cgroup_shm {
+    netdata_ebpf_cgroup_shm_header_t *header;
+    netdata_ebpf_cgroup_shm_body_t *body;
+} netdata_ebpf_cgroup_shm_t;
+
+#define NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME "netdata_shm_cgroup_ebpf"
+#define NETDATA_NAMED_SEMAPHORE_EBPF_CGROUP_NAME "/netdata_sem_cgroup_ebpf"
+
 #include "../proc.plugin/plugin_proc.h"
 
 #else // (TARGET_OS == OS_LINUX)