summaryrefslogtreecommitdiffstats
path: root/collectors/proc.plugin/ipc.c
diff options
context:
space:
mode:
Diffstat (limited to 'collectors/proc.plugin/ipc.c')
-rw-r--r--collectors/proc.plugin/ipc.c554
1 files changed, 0 insertions, 554 deletions
diff --git a/collectors/proc.plugin/ipc.c b/collectors/proc.plugin/ipc.c
deleted file mode 100644
index 204977bdf..000000000
--- a/collectors/proc.plugin/ipc.c
+++ /dev/null
@@ -1,554 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#include "plugin_proc.h"
-
-#include <sys/sem.h>
-#include <sys/msg.h>
-#include <sys/shm.h>
-
-
-#ifndef SEMVMX
-#define SEMVMX 32767 /* <= 32767 semaphore maximum value */
-#endif
-
-/* Some versions of libc only define IPC_INFO when __USE_GNU is defined. */
-#ifndef IPC_INFO
-#define IPC_INFO 3
-#endif
-
-struct ipc_limits {
- uint64_t shmmni; /* max number of segments */
- uint64_t shmmax; /* max segment size */
- uint64_t shmall; /* max total shared memory */
- uint64_t shmmin; /* min segment size */
-
- int semmni; /* max number of arrays */
- int semmsl; /* max semaphores per array */
- int semmns; /* max semaphores system wide */
- int semopm; /* max ops per semop call */
- unsigned int semvmx; /* semaphore max value (constant) */
-
- int msgmni; /* max queues system wide */
- size_t msgmax; /* max size of message */
- int msgmnb; /* default max size of queue */
-};
-
-struct ipc_status {
- int semusz; /* current number of arrays */
- int semaem; /* current semaphores system wide */
-};
-
-/*
- * The last arg of semctl is a union semun, but where is it defined? X/OPEN
- * tells us to define it ourselves, but until recently Linux include files
- * would also define it.
- */
-#ifndef HAVE_UNION_SEMUN
-/* according to X/OPEN we have to define it ourselves */
-union semun {
- int val;
- struct semid_ds *buf;
- unsigned short int *array;
- struct seminfo *__buf;
-};
-#endif
-
-struct message_queue {
- unsigned long long id;
- int found;
-
- RRDDIM *rd_messages;
- RRDDIM *rd_bytes;
- unsigned long long messages;
- unsigned long long bytes;
-
- struct message_queue * next;
-};
-
-struct shm_stats {
- unsigned long long segments;
- unsigned long long bytes;
-};
-
-static inline int ipc_sem_get_limits(struct ipc_limits *lim) {
- static procfile *ff = NULL;
- static int error_shown = 0;
- static char filename[FILENAME_MAX + 1] = "";
-
- if(unlikely(!filename[0]))
- snprintfz(filename, FILENAME_MAX, "%s/proc/sys/kernel/sem", netdata_configured_host_prefix);
-
- if(unlikely(!ff)) {
- ff = procfile_open(filename, NULL, PROCFILE_FLAG_DEFAULT);
- if(unlikely(!ff)) {
- if(unlikely(!error_shown)) {
- collector_error("IPC: Cannot open file '%s'.", filename);
- error_shown = 1;
- }
- goto ipc;
- }
- }
-
- ff = procfile_readall(ff);
- if(unlikely(!ff)) {
- if(unlikely(!error_shown)) {
- collector_error("IPC: Cannot read file '%s'.", filename);
- error_shown = 1;
- }
- goto ipc;
- }
-
- if(procfile_lines(ff) >= 1 && procfile_linewords(ff, 0) >= 4) {
- lim->semvmx = SEMVMX;
- lim->semmsl = str2i(procfile_lineword(ff, 0, 0));
- lim->semmns = str2i(procfile_lineword(ff, 0, 1));
- lim->semopm = str2i(procfile_lineword(ff, 0, 2));
- lim->semmni = str2i(procfile_lineword(ff, 0, 3));
- return 0;
- }
- else {
- if(unlikely(!error_shown)) {
- collector_error("IPC: Invalid content in file '%s'.", filename);
- error_shown = 1;
- }
- goto ipc;
- }
-
-ipc:
- // cannot do it from the file
- // query IPC
- {
- struct seminfo seminfo = {.semmni = 0};
- union semun arg = {.array = (ushort *) &seminfo};
-
- if(unlikely(semctl(0, 0, IPC_INFO, arg) < 0)) {
- collector_error("IPC: Failed to read '%s' and request IPC_INFO with semctl().", filename);
- goto error;
- }
-
- lim->semvmx = SEMVMX;
- lim->semmni = seminfo.semmni;
- lim->semmsl = seminfo.semmsl;
- lim->semmns = seminfo.semmns;
- lim->semopm = seminfo.semopm;
- return 0;
- }
-
-error:
- lim->semvmx = 0;
- lim->semmni = 0;
- lim->semmsl = 0;
- lim->semmns = 0;
- lim->semopm = 0;
- return -1;
-}
-
-/*
-printf ("------ Semaphore Limits --------\n");
-printf ("max number of arrays = %d\n", limits.semmni);
-printf ("max semaphores per array = %d\n", limits.semmsl);
-printf ("max semaphores system wide = %d\n", limits.semmns);
-printf ("max ops per semop call = %d\n", limits.semopm);
-printf ("semaphore max value = %u\n", limits.semvmx);
-
-printf ("------ Semaphore Status --------\n");
-printf ("used arrays = %d\n", status.semusz);
-printf ("allocated semaphores = %d\n", status.semaem);
-*/
-
-static inline int ipc_sem_get_status(struct ipc_status *st) {
- struct seminfo seminfo;
- union semun arg;
-
- arg.array = (ushort *) (void *) &seminfo;
-
- if(unlikely(semctl (0, 0, SEM_INFO, arg) < 0)) {
- /* kernel not configured for semaphores */
- static int error_shown = 0;
- if(unlikely(!error_shown)) {
- collector_error("IPC: kernel is not configured for semaphores");
- error_shown = 1;
- }
- st->semusz = 0;
- st->semaem = 0;
- return -1;
- }
-
- st->semusz = seminfo.semusz;
- st->semaem = seminfo.semaem;
- return 0;
-}
-
-int ipc_msq_get_info(char *msg_filename, struct message_queue **message_queue_root) {
- static procfile *ff;
- struct message_queue *msq;
-
- if(unlikely(!ff)) {
- ff = procfile_open(msg_filename, " \t:", PROCFILE_FLAG_DEFAULT);
- if(unlikely(!ff)) return 1;
- }
-
- ff = procfile_readall(ff);
- if(unlikely(!ff)) return 1;
-
- size_t lines = procfile_lines(ff);
- size_t words = 0;
-
- if(unlikely(lines < 2)) {
- collector_error("Cannot read %s. Expected 2 or more lines, read %zu.", procfile_filename(ff), lines);
- return 1;
- }
-
- // loop through all lines except the first and the last ones
- size_t l;
- for(l = 1; l < lines - 1; l++) {
- words = procfile_linewords(ff, l);
- if(unlikely(words < 2)) continue;
- if(unlikely(words < 14)) {
- collector_error("Cannot read %s line. Expected 14 params, read %zu.", procfile_filename(ff), words);
- continue;
- }
-
- // find the id in the linked list or create a new structure
- int found = 0;
-
- unsigned long long id = str2ull(procfile_lineword(ff, l, 1), NULL);
- for(msq = *message_queue_root; msq ; msq = msq->next) {
- if(unlikely(id == msq->id)) {
- found = 1;
- break;
- }
- }
-
- if(unlikely(!found)) {
- msq = callocz(1, sizeof(struct message_queue));
- msq->next = *message_queue_root;
- *message_queue_root = msq;
- msq->id = id;
- }
-
- msq->messages = str2ull(procfile_lineword(ff, l, 4), NULL);
- msq->bytes = str2ull(procfile_lineword(ff, l, 3), NULL);
- msq->found = 1;
- }
-
- return 0;
-}
-
-int ipc_shm_get_info(char *shm_filename, struct shm_stats *shm) {
- static procfile *ff;
-
- if(unlikely(!ff)) {
- ff = procfile_open(shm_filename, " \t:", PROCFILE_FLAG_DEFAULT);
- if(unlikely(!ff)) return 1;
- }
-
- ff = procfile_readall(ff);
- if(unlikely(!ff)) return 1;
-
- size_t lines = procfile_lines(ff);
- size_t words = 0;
-
- if(unlikely(lines < 2)) {
- collector_error("Cannot read %s. Expected 2 or more lines, read %zu.", procfile_filename(ff), lines);
- return 1;
- }
-
- shm->segments = 0;
- shm->bytes = 0;
-
- // loop through all lines except the first and the last ones
- size_t l;
- for(l = 1; l < lines - 1; l++) {
- words = procfile_linewords(ff, l);
- if(unlikely(words < 2)) continue;
- if(unlikely(words < 16)) {
- collector_error("Cannot read %s line. Expected 16 params, read %zu.", procfile_filename(ff), words);
- continue;
- }
-
- shm->segments++;
- shm->bytes += str2ull(procfile_lineword(ff, l, 3), NULL);
- }
-
- return 0;
-}
-
-int do_ipc(int update_every, usec_t dt) {
- (void)dt;
-
- static int do_sem = -1, do_msg = -1, do_shm = -1;
- static int read_limits_next = -1;
- static struct ipc_limits limits;
- static struct ipc_status status;
- static const RRDVAR_ACQUIRED *arrays_max = NULL, *semaphores_max = NULL;
- static RRDSET *st_semaphores = NULL, *st_arrays = NULL;
- static RRDDIM *rd_semaphores = NULL, *rd_arrays = NULL;
- static char *msg_filename = NULL;
- static struct message_queue *message_queue_root = NULL;
- static long long dimensions_limit;
- static char *shm_filename = NULL;
-
- if(unlikely(do_sem == -1)) {
- do_msg = config_get_boolean("plugin:proc:ipc", "message queues", CONFIG_BOOLEAN_YES);
- do_sem = config_get_boolean("plugin:proc:ipc", "semaphore totals", CONFIG_BOOLEAN_YES);
- do_shm = config_get_boolean("plugin:proc:ipc", "shared memory totals", CONFIG_BOOLEAN_YES);
-
- char filename[FILENAME_MAX + 1];
-
- snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sysvipc/msg");
- msg_filename = config_get("plugin:proc:ipc", "msg filename to monitor", filename);
-
- snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sysvipc/shm");
- shm_filename = config_get("plugin:proc:ipc", "shm filename to monitor", filename);
-
- dimensions_limit = config_get_number("plugin:proc:ipc", "max dimensions in memory allowed", 50);
-
- // make sure it works
- if(ipc_sem_get_limits(&limits) == -1) {
- collector_error("unable to fetch semaphore limits");
- do_sem = CONFIG_BOOLEAN_NO;
- }
- else if(ipc_sem_get_status(&status) == -1) {
- collector_error("unable to fetch semaphore statistics");
- do_sem = CONFIG_BOOLEAN_NO;
- }
- else {
- // create the charts
- if(unlikely(!st_semaphores)) {
- st_semaphores = rrdset_create_localhost(
- "system"
- , "ipc_semaphores"
- , NULL
- , "ipc semaphores"
- , NULL
- , "IPC Semaphores"
- , "semaphores"
- , PLUGIN_PROC_NAME
- , "ipc"
- , NETDATA_CHART_PRIO_SYSTEM_IPC_SEMAPHORES
- , localhost->rrd_update_every
- , RRDSET_TYPE_AREA
- );
- rd_semaphores = rrddim_add(st_semaphores, "semaphores", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
- }
-
- if(unlikely(!st_arrays)) {
- st_arrays = rrdset_create_localhost(
- "system"
- , "ipc_semaphore_arrays"
- , NULL
- , "ipc semaphores"
- , NULL
- , "IPC Semaphore Arrays"
- , "arrays"
- , PLUGIN_PROC_NAME
- , "ipc"
- , NETDATA_CHART_PRIO_SYSTEM_IPC_SEM_ARRAYS
- , localhost->rrd_update_every
- , RRDSET_TYPE_AREA
- );
- rd_arrays = rrddim_add(st_arrays, "arrays", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
- }
-
- // variables
- semaphores_max = rrdvar_custom_host_variable_add_and_acquire(localhost, "ipc_semaphores_max");
- arrays_max = rrdvar_custom_host_variable_add_and_acquire(localhost, "ipc_semaphores_arrays_max");
- }
-
- struct stat stbuf;
- if (stat(msg_filename, &stbuf)) {
- do_msg = CONFIG_BOOLEAN_NO;
- }
-
- if(unlikely(do_sem == CONFIG_BOOLEAN_NO && do_msg == CONFIG_BOOLEAN_NO)) {
- collector_error("ipc module disabled");
- return 1;
- }
- }
-
- if(likely(do_sem != CONFIG_BOOLEAN_NO)) {
- if(unlikely(read_limits_next < 0)) {
- if(unlikely(ipc_sem_get_limits(&limits) == -1)) {
- collector_error("Unable to fetch semaphore limits.");
- }
- else {
- if(semaphores_max) rrdvar_custom_host_variable_set(localhost, semaphores_max, limits.semmns);
- if(arrays_max) rrdvar_custom_host_variable_set(localhost, arrays_max, limits.semmni);
-
- st_arrays->red = limits.semmni;
- st_semaphores->red = limits.semmns;
-
- read_limits_next = 60 / update_every;
- }
- }
- else
- read_limits_next--;
-
- if(unlikely(ipc_sem_get_status(&status) == -1)) {
- collector_error("Unable to get semaphore statistics");
- return 0;
- }
-
- rrddim_set_by_pointer(st_semaphores, rd_semaphores, status.semaem);
- rrdset_done(st_semaphores);
-
- rrddim_set_by_pointer(st_arrays, rd_arrays, status.semusz);
- rrdset_done(st_arrays);
- }
-
- if(likely(do_msg != CONFIG_BOOLEAN_NO)) {
- static RRDSET *st_msq_messages = NULL, *st_msq_bytes = NULL;
-
- int ret = ipc_msq_get_info(msg_filename, &message_queue_root);
-
- if(!ret && message_queue_root) {
- if(unlikely(!st_msq_messages))
- st_msq_messages = rrdset_create_localhost(
- "system"
- , "message_queue_messages"
- , NULL
- , "ipc message queues"
- , NULL
- , "IPC Message Queue Number of Messages"
- , "messages"
- , PLUGIN_PROC_NAME
- , "ipc"
- , NETDATA_CHART_PRIO_SYSTEM_IPC_MSQ_MESSAGES
- , update_every
- , RRDSET_TYPE_STACKED
- );
-
- if(unlikely(!st_msq_bytes))
- st_msq_bytes = rrdset_create_localhost(
- "system"
- , "message_queue_bytes"
- , NULL
- , "ipc message queues"
- , NULL
- , "IPC Message Queue Used Bytes"
- , "bytes"
- , PLUGIN_PROC_NAME
- , "ipc"
- , NETDATA_CHART_PRIO_SYSTEM_IPC_MSQ_SIZE
- , update_every
- , RRDSET_TYPE_STACKED
- );
-
- struct message_queue *msq = message_queue_root, *msq_prev = NULL;
- while(likely(msq)){
- if(likely(msq->found)) {
- if(unlikely(!msq->rd_messages || !msq->rd_bytes)) {
- char id[RRD_ID_LENGTH_MAX + 1];
- snprintfz(id, RRD_ID_LENGTH_MAX, "%llu", msq->id);
- if(likely(!msq->rd_messages)) msq->rd_messages = rrddim_add(st_msq_messages, id, NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
- if(likely(!msq->rd_bytes)) msq->rd_bytes = rrddim_add(st_msq_bytes, id, NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
- }
-
- rrddim_set_by_pointer(st_msq_messages, msq->rd_messages, msq->messages);
- rrddim_set_by_pointer(st_msq_bytes, msq->rd_bytes, msq->bytes);
-
- msq->found = 0;
- }
- else {
- rrddim_is_obsolete___safe_from_collector_thread(st_msq_messages, msq->rd_messages);
- rrddim_is_obsolete___safe_from_collector_thread(st_msq_bytes, msq->rd_bytes);
-
- // remove message queue from the linked list
- if(!msq_prev)
- message_queue_root = msq->next;
- else
- msq_prev->next = msq->next;
- freez(msq);
- msq = NULL;
- }
- if(likely(msq)) {
- msq_prev = msq;
- msq = msq->next;
- }
- else if(!msq_prev)
- msq = message_queue_root;
- else
- msq = msq_prev->next;
- }
-
- rrdset_done(st_msq_messages);
- rrdset_done(st_msq_bytes);
-
- long long dimensions_num = rrdset_number_of_dimensions(st_msq_messages);
-
- if(unlikely(dimensions_num > dimensions_limit)) {
- collector_info("Message queue statistics has been disabled");
- collector_info("There are %lld dimensions in memory but limit was set to %lld", dimensions_num, dimensions_limit);
- rrdset_is_obsolete___safe_from_collector_thread(st_msq_messages);
- rrdset_is_obsolete___safe_from_collector_thread(st_msq_bytes);
- st_msq_messages = NULL;
- st_msq_bytes = NULL;
- do_msg = CONFIG_BOOLEAN_NO;
- }
- else if(unlikely(!message_queue_root)) {
- collector_info("Making chart %s (%s) obsolete since it does not have any dimensions", rrdset_name(st_msq_messages), rrdset_id(st_msq_messages));
- rrdset_is_obsolete___safe_from_collector_thread(st_msq_messages);
- st_msq_messages = NULL;
-
- collector_info("Making chart %s (%s) obsolete since it does not have any dimensions", rrdset_name(st_msq_bytes), rrdset_id(st_msq_bytes));
- rrdset_is_obsolete___safe_from_collector_thread(st_msq_bytes);
- st_msq_bytes = NULL;
- }
- }
- }
-
- if(likely(do_shm != CONFIG_BOOLEAN_NO)) {
- static RRDSET *st_shm_segments = NULL, *st_shm_bytes = NULL;
- static RRDDIM *rd_shm_segments = NULL, *rd_shm_bytes = NULL;
- struct shm_stats shm;
-
- if(!ipc_shm_get_info(shm_filename, &shm)) {
- if(unlikely(!st_shm_segments)) {
- st_shm_segments = rrdset_create_localhost(
- "system"
- , "shared_memory_segments"
- , NULL
- , "ipc shared memory"
- , NULL
- , "IPC Shared Memory Number of Segments"
- , "segments"
- , PLUGIN_PROC_NAME
- , "ipc"
- , NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_SEGS
- , update_every
- , RRDSET_TYPE_STACKED
- );
-
- rd_shm_segments = rrddim_add(st_shm_segments, "segments", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
- }
-
- rrddim_set_by_pointer(st_shm_segments, rd_shm_segments, shm.segments);
- rrdset_done(st_shm_segments);
-
- if(unlikely(!st_shm_bytes)) {
- st_shm_bytes = rrdset_create_localhost(
- "system"
- , "shared_memory_bytes"
- , NULL
- , "ipc shared memory"
- , NULL
- , "IPC Shared Memory Used Bytes"
- , "bytes"
- , PLUGIN_PROC_NAME
- , "ipc"
- , NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_SIZE
- , update_every
- , RRDSET_TYPE_STACKED
- );
-
- rd_shm_bytes = rrddim_add(st_shm_bytes, "bytes", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
- }
-
- rrddim_set_by_pointer(st_shm_bytes, rd_shm_bytes, shm.bytes);
- rrdset_done(st_shm_bytes);
- }
- }
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 08:23:54 +0000