New upstream version 1.6.0+dfsgupstream/1.6.0+dfsg

1 files changed, 313 insertions, 0 deletions

diff --git a/src/rrddim.c b/src/rrddim.c
new file mode 100644
index 00000000..54a17522
--- /dev/null
+++ b/src/rrddim.c
@@ -0,0 +1,313 @@
+#define NETDATA_RRD_INTERNALS 1
+#include "common.h"
+
+// ----------------------------------------------------------------------------
+// RRDDIM index
+
+int rrddim_compare(void* a, void* b) {
+    if(((RRDDIM *)a)->hash < ((RRDDIM *)b)->hash) return -1;
+    else if(((RRDDIM *)a)->hash > ((RRDDIM *)b)->hash) return 1;
+    else return strcmp(((RRDDIM *)a)->id, ((RRDDIM *)b)->id);
+}
+
+#define rrddim_index_add(st, rd) (RRDDIM *)avl_insert_lock(&((st)->dimensions_index), (avl *)(rd))
+#define rrddim_index_del(st,rd ) (RRDDIM *)avl_remove_lock(&((st)->dimensions_index), (avl *)(rd))
+
+static inline RRDDIM *rrddim_index_find(RRDSET *st, const char *id, uint32_t hash) {
+    RRDDIM tmp = {
+            .id = id,
+            .hash = (hash)?hash:simple_hash(id)
+    };
+    return (RRDDIM *)avl_search_lock(&(st->dimensions_index), (avl *) &tmp);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDDIM - find a dimension
+
+inline RRDDIM *rrddim_find(RRDSET *st, const char *id) {
+    debug(D_RRD_CALLS, "rrddim_find() for chart %s, dimension %s", st->name, id);
+
+    return rrddim_index_find(st, id, 0);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDDIM rename a dimension
+
+inline void rrddim_set_name(RRDSET *st, RRDDIM *rd, const char *name) {
+    if(unlikely(!strcmp(rd->name, name)))
+        return;
+
+    debug(D_RRD_CALLS, "rrddim_set_name() from %s.%s to %s.%s", st->name, rd->name, st->name, name);
+
+    char varname[CONFIG_MAX_NAME + 1];
+    snprintfz(varname, CONFIG_MAX_NAME, "dim %s name", rd->id);
+    rd->name = config_set_default(st->config_section, varname, name);
+    rd->hash_name = simple_hash(rd->name);
+
+    rrddimvar_rename_all(rd);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDDIM create a dimension
+
+RRDDIM *rrddim_add(RRDSET *st, const char *id, const char *name, collected_number multiplier, collected_number divisor, RRD_ALGORITHM algorithm) {
+    RRDDIM *rd = rrddim_find(st, id);
+    if(unlikely(rd)) {
+        debug(D_RRD_CALLS, "Cannot create rrd dimension '%s/%s', it already exists.", st->id, name?name:"<NONAME>");
+        return rd;
+    }
+
+    char filename[FILENAME_MAX + 1];
+    char fullfilename[FILENAME_MAX + 1];
+
+    char varname[CONFIG_MAX_NAME + 1];
+    unsigned long size = sizeof(RRDDIM) + (st->entries * sizeof(storage_number));
+
+    debug(D_RRD_CALLS, "Adding dimension '%s/%s'.", st->id, id);
+
+    rrdset_strncpyz_name(filename, id, FILENAME_MAX);
+    snprintfz(fullfilename, FILENAME_MAX, "%s/%s.db", st->cache_dir, filename);
+
+    if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
+        rd = (RRDDIM *)mymmap(fullfilename, size, ((st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE), 1);
+        if(likely(rd)) {
+            // we have a file mapped for rd
+
+            memset(&rd->avl, 0, sizeof(avl));
+            rd->id = NULL;
+            rd->name = NULL;
+            rd->cache_filename = NULL;
+            rd->variables = NULL;
+            rd->next = NULL;
+            rd->rrdset = NULL;
+
+            struct timeval now;
+            now_realtime_timeval(&now);
+
+            if(strcmp(rd->magic, RRDDIMENSION_MAGIC) != 0) {
+                errno = 0;
+                info("Initializing file %s.", fullfilename);
+                memset(rd, 0, size);
+            }
+            else if(rd->memsize != size) {
+                errno = 0;
+                error("File %s does not have the desired size. Clearing it.", fullfilename);
+                memset(rd, 0, size);
+            }
+            else if(rd->multiplier != multiplier) {
+                errno = 0;
+                error("File %s does not have the same multiplier. Clearing it.", fullfilename);
+                memset(rd, 0, size);
+            }
+            else if(rd->divisor != divisor) {
+                errno = 0;
+                error("File %s does not have the same divisor. Clearing it.", fullfilename);
+                memset(rd, 0, size);
+            }
+            else if(rd->update_every != st->update_every) {
+                errno = 0;
+                error("File %s does not have the same refresh frequency. Clearing it.", fullfilename);
+                memset(rd, 0, size);
+            }
+            else if(dt_usec(&now, &rd->last_collected_time) > (rd->entries * rd->update_every * USEC_PER_SEC)) {
+                errno = 0;
+                error("File %s is too old. Clearing it.", fullfilename);
+                memset(rd, 0, size);
+            }
+
+            if(rd->algorithm && rd->algorithm != algorithm)
+                error("File %s does not have the expected algorithm (expected %u '%s', found %u '%s'). Previous values may be wrong."
+                      , fullfilename, algorithm, rrd_algorithm_name(algorithm), rd->algorithm,
+                        rrd_algorithm_name(rd->algorithm));
+
+            // make sure we have the right memory mode
+            // even if we cleared the memory
+            rd->rrd_memory_mode = st->rrd_memory_mode;
+        }
+    }
+
+    if(unlikely(!rd)) {
+        // if we didn't manage to get a mmap'd dimension, just create one
+        rd = callocz(1, size);
+        rd->rrd_memory_mode = (st->rrd_memory_mode == RRD_MEMORY_MODE_NONE) ? RRD_MEMORY_MODE_NONE : RRD_MEMORY_MODE_RAM;
+    }
+
+    rd->memsize = size;
+
+    strcpy(rd->magic, RRDDIMENSION_MAGIC);
+
+    rd->id = strdupz(id);
+    rd->hash = simple_hash(rd->id);
+
+    rd->cache_filename = strdupz(fullfilename);
+
+    snprintfz(varname, CONFIG_MAX_NAME, "dim %s name", rd->id);
+    rd->name = config_get(st->config_section, varname, (name && *name)?name:rd->id);
+    rd->hash_name = simple_hash(rd->name);
+
+    snprintfz(varname, CONFIG_MAX_NAME, "dim %s algorithm", rd->id);
+    rd->algorithm = rrd_algorithm_id(config_get(st->config_section, varname, rrd_algorithm_name(algorithm)));
+
+    snprintfz(varname, CONFIG_MAX_NAME, "dim %s multiplier", rd->id);
+    rd->multiplier = config_get_number(st->config_section, varname, multiplier);
+
+    snprintfz(varname, CONFIG_MAX_NAME, "dim %s divisor", rd->id);
+    rd->divisor = config_get_number(st->config_section, varname, divisor);
+    if(!rd->divisor) rd->divisor = 1;
+
+    rd->entries = st->entries;
+    rd->update_every = st->update_every;
+
+    // prevent incremental calculation spikes
+    rd->collections_counter = 0;
+    rd->updated = 0;
+    rd->flags = 0x00000000;
+
+    rd->calculated_value = 0;
+    rd->last_calculated_value = 0;
+    rd->collected_value = 0;
+    rd->last_collected_value = 0;
+    rd->collected_volume = 0;
+    rd->stored_volume = 0;
+    rd->last_stored_value = 0;
+    rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
+    rd->last_collected_time.tv_sec = 0;
+    rd->last_collected_time.tv_usec = 0;
+    rd->rrdset = st;
+
+    // append this dimension
+    rrdset_wrlock(st);
+    if(!st->dimensions)
+        st->dimensions = rd;
+    else {
+        RRDDIM *td = st->dimensions;
+        for(; td->next; td = td->next) ;
+        td->next = rd;
+    }
+
+    if(st->rrdhost->health_enabled) {
+        rrddimvar_create(rd, RRDVAR_TYPE_CALCULATED, NULL, NULL, &rd->last_stored_value, 0);
+        rrddimvar_create(rd, RRDVAR_TYPE_COLLECTED, NULL, "_raw", &rd->last_collected_value, 0);
+        rrddimvar_create(rd, RRDVAR_TYPE_TIME_T, NULL, "_last_collected_t", &rd->last_collected_time.tv_sec, 0);
+    }
+
+    rrdset_unlock(st);
+
+    if(unlikely(rrddim_index_add(st, rd) != rd))
+        error("RRDDIM: INTERNAL ERROR: attempt to index duplicate dimension '%s' on chart '%s'", rd->id, st->id);
+
+    return(rd);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDDIM remove / free a dimension
+
+void rrddim_free(RRDSET *st, RRDDIM *rd)
+{
+    debug(D_RRD_CALLS, "rrddim_free() %s.%s", st->name, rd->name);
+
+    if(rd == st->dimensions)
+        st->dimensions = rd->next;
+    else {
+        RRDDIM *i;
+        for (i = st->dimensions; i && i->next != rd; i = i->next) ;
+
+        if (i && i->next == rd)
+            i->next = rd->next;
+        else
+            error("Request to free dimension '%s.%s' but it is not linked.", st->id, rd->name);
+    }
+    rd->next = NULL;
+
+    while(rd->variables)
+        rrddimvar_free(rd->variables);
+
+    if(unlikely(rrddim_index_del(st, rd) != rd))
+        error("RRDDIM: INTERNAL ERROR: attempt to remove from index dimension '%s' on chart '%s', removed a different dimension.", rd->id, st->id);
+
+    // free(rd->annotations);
+
+    switch(rd->rrd_memory_mode) {
+        case RRD_MEMORY_MODE_SAVE:
+            debug(D_RRD_CALLS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename);
+            savememory(rd->cache_filename, rd, rd->memsize);
+            // continue to map mode - no break;
+
+        case RRD_MEMORY_MODE_MAP:
+            debug(D_RRD_CALLS, "Unmapping dimension '%s'.", rd->name);
+            freez((void *)rd->id);
+            freez(rd->cache_filename);
+            munmap(rd, rd->memsize);
+            break;
+
+        case RRD_MEMORY_MODE_NONE:
+        case RRD_MEMORY_MODE_RAM:
+            debug(D_RRD_CALLS, "Removing dimension '%s'.", rd->name);
+            freez((void *)rd->id);
+            freez(rd->cache_filename);
+            freez(rd);
+            break;
+    }
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDDIM - set dimension options
+
+int rrddim_hide(RRDSET *st, const char *id) {
+    debug(D_RRD_CALLS, "rrddim_hide() for chart %s, dimension %s", st->name, id);
+
+    RRDDIM *rd = rrddim_find(st, id);
+    if(unlikely(!rd)) {
+        error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id);
+        return 1;
+    }
+
+    rrddim_flag_set(rd, RRDDIM_FLAG_HIDDEN);
+    return 0;
+}
+
+int rrddim_unhide(RRDSET *st, const char *id) {
+    debug(D_RRD_CALLS, "rrddim_unhide() for chart %s, dimension %s", st->name, id);
+
+    RRDDIM *rd = rrddim_find(st, id);
+    if(unlikely(!rd)) {
+        error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id);
+        return 1;
+    }
+
+    rrddim_flag_clear(rd, RRDDIM_FLAG_HIDDEN);
+    return 0;
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDDIM - collect values for a dimension
+
+inline collected_number rrddim_set_by_pointer(RRDSET *st, RRDDIM *rd, collected_number value) {
+    debug(D_RRD_CALLS, "rrddim_set_by_pointer() for chart %s, dimension %s, value " COLLECTED_NUMBER_FORMAT, st->name, rd->name, value);
+
+    now_realtime_timeval(&rd->last_collected_time);
+    rd->collected_value = value;
+    rd->updated = 1;
+
+    rd->collections_counter++;
+
+    // fprintf(stderr, "%s.%s %llu " COLLECTED_NUMBER_FORMAT " dt %0.6f" " rate " CALCULATED_NUMBER_FORMAT "\n", st->name, rd->name, st->usec_since_last_update, value, (float)((double)st->usec_since_last_update / (double)1000000), (calculated_number)((value - rd->last_collected_value) * (calculated_number)rd->multiplier / (calculated_number)rd->divisor * 1000000.0 / (calculated_number)st->usec_since_last_update));
+
+    return rd->last_collected_value;
+}
+
+collected_number rrddim_set(RRDSET *st, const char *id, collected_number value) {
+    RRDDIM *rd = rrddim_find(st, id);
+    if(unlikely(!rd)) {
+        error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id);
+        return 0;
+    }
+
+    return rrddim_set_by_pointer(st, rd, value);
+}