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- /*-
- * Copyright 2016 Vsevolod Stakhov
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include "config.h"
- #include "rrd.h"
- #include "util.h"
- #include "logger.h"
- #include "unix-std.h"
- #include "cryptobox.h"
- #include <math.h>
-
- #define RSPAMD_RRD_DS_COUNT METRIC_ACTION_MAX
- #define RSPAMD_RRD_OLD_DS_COUNT 4
- #define RSPAMD_RRD_RRA_COUNT 4
-
- #define msg_err_rrd(...) rspamd_default_log_function (G_LOG_LEVEL_CRITICAL, \
- "rrd", file->id, \
- G_STRFUNC, \
- __VA_ARGS__)
- #define msg_warn_rrd(...) rspamd_default_log_function (G_LOG_LEVEL_WARNING, \
- "rrd", file->id, \
- G_STRFUNC, \
- __VA_ARGS__)
- #define msg_info_rrd(...) rspamd_default_log_function (G_LOG_LEVEL_INFO, \
- "rrd", file->id, \
- G_STRFUNC, \
- __VA_ARGS__)
- #define msg_debug_rrd(...) rspamd_conditional_debug_fast (NULL, NULL, \
- rspamd_rrd_log_id, "rrd", file->id, \
- G_STRFUNC, \
- __VA_ARGS__)
-
- INIT_LOG_MODULE(rrd)
-
- static GQuark
- rrd_error_quark (void)
- {
- return g_quark_from_static_string ("rrd-error");
- }
-
- /**
- * Convert rrd dst type from string to numeric value
- */
- enum rrd_dst_type
- rrd_dst_from_string (const gchar *str)
- {
- if (g_ascii_strcasecmp (str, "counter") == 0) {
- return RRD_DST_COUNTER;
- }
- else if (g_ascii_strcasecmp (str, "absolute") == 0) {
- return RRD_DST_ABSOLUTE;
- }
- else if (g_ascii_strcasecmp (str, "gauge") == 0) {
- return RRD_DST_GAUGE;
- }
- else if (g_ascii_strcasecmp (str, "cdef") == 0) {
- return RRD_DST_CDEF;
- }
- else if (g_ascii_strcasecmp (str, "derive") == 0) {
- return RRD_DST_DERIVE;
- }
-
- return RRD_DST_INVALID;
- }
-
- /**
- * Convert numeric presentation of dst to string
- */
- const gchar *
- rrd_dst_to_string (enum rrd_dst_type type)
- {
- switch (type) {
- case RRD_DST_COUNTER:
- return "COUNTER";
- case RRD_DST_ABSOLUTE:
- return "ABSOLUTE";
- case RRD_DST_GAUGE:
- return "GAUGE";
- case RRD_DST_CDEF:
- return "CDEF";
- case RRD_DST_DERIVE:
- return "DERIVE";
- default:
- return "U";
- }
-
- return "U";
- }
-
- /**
- * Convert rrd consolidation function type from string to numeric value
- */
- enum rrd_cf_type
- rrd_cf_from_string (const gchar *str)
- {
- if (g_ascii_strcasecmp (str, "average") == 0) {
- return RRD_CF_AVERAGE;
- }
- else if (g_ascii_strcasecmp (str, "minimum") == 0) {
- return RRD_CF_MINIMUM;
- }
- else if (g_ascii_strcasecmp (str, "maximum") == 0) {
- return RRD_CF_MAXIMUM;
- }
- else if (g_ascii_strcasecmp (str, "last") == 0) {
- return RRD_CF_LAST;
- }
- /* XXX: add other CF functions supported by rrd */
-
- return RRD_CF_INVALID;
- }
-
- /**
- * Convert numeric presentation of cf to string
- */
- const gchar *
- rrd_cf_to_string (enum rrd_cf_type type)
- {
- switch (type) {
- case RRD_CF_AVERAGE:
- return "AVERAGE";
- case RRD_CF_MINIMUM:
- return "MINIMUM";
- case RRD_CF_MAXIMUM:
- return "MAXIMUM";
- case RRD_CF_LAST:
- return "LAST";
- default:
- return "U";
- }
-
- /* XXX: add other CF functions supported by rrd */
-
- return "U";
- }
-
- void
- rrd_make_default_rra (const gchar *cf_name,
- gulong pdp_cnt,
- gulong rows,
- struct rrd_rra_def *rra)
- {
- g_assert (cf_name != NULL);
- g_assert (rrd_cf_from_string (cf_name) != RRD_CF_INVALID);
-
- rra->pdp_cnt = pdp_cnt;
- rra->row_cnt = rows;
- rspamd_strlcpy (rra->cf_nam, cf_name, sizeof (rra->cf_nam));
- memset (rra->par, 0, sizeof (rra->par));
- rra->par[RRA_cdp_xff_val].dv = 0.5;
- }
-
- void
- rrd_make_default_ds (const gchar *name,
- const gchar *type,
- gulong pdp_step,
- struct rrd_ds_def *ds)
- {
- g_assert (name != NULL);
- g_assert (type != NULL);
- g_assert (rrd_dst_from_string (type) != RRD_DST_INVALID);
-
- rspamd_strlcpy (ds->ds_nam, name, sizeof (ds->ds_nam));
- rspamd_strlcpy (ds->dst, type, sizeof (ds->dst));
- memset (ds->par, 0, sizeof (ds->par));
- ds->par[RRD_DS_mrhb_cnt].lv = pdp_step * 2;
- ds->par[RRD_DS_min_val].dv = NAN;
- ds->par[RRD_DS_max_val].dv = NAN;
- }
-
- /**
- * Check rrd file for correctness (size, cookies, etc)
- */
- static gboolean
- rspamd_rrd_check_file (const gchar *filename, gboolean need_data, GError **err)
- {
- gint fd, i;
- struct stat st;
- struct rrd_file_head head;
- struct rrd_rra_def rra;
- gint head_size;
-
- fd = open (filename, O_RDWR);
- if (fd == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd open error: %s", strerror (errno));
- return FALSE;
- }
-
- if (fstat (fd, &st) == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd stat error: %s", strerror (errno));
- close (fd);
- return FALSE;
- }
- if (st.st_size < (goffset)sizeof (struct rrd_file_head)) {
- /* We have trimmed file */
- g_set_error (err, rrd_error_quark (), EINVAL, "rrd size is bad: %ud",
- (guint)st.st_size);
- close (fd);
- return FALSE;
- }
-
- /* Try to read header */
- if (read (fd, &head, sizeof (head)) != sizeof (head)) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd read head error: %s",
- strerror (errno));
- close (fd);
- return FALSE;
- }
- /* Check magic */
- if (memcmp (head.version, RRD_VERSION, sizeof (head.version)) != 0) {
- g_set_error (err,
- rrd_error_quark (), EINVAL, "rrd head error: bad cookie");
- close (fd);
- return FALSE;
- }
- if (head.float_cookie != RRD_FLOAT_COOKIE) {
- g_set_error (err,
- rrd_error_quark (), EINVAL, "rrd head error: another architecture "
- "(file cookie %g != our cookie %g)",
- head.float_cookie, RRD_FLOAT_COOKIE);
- close (fd);
- return FALSE;
- }
- /* Check for other params */
- if (head.ds_cnt <= 0 || head.rra_cnt <= 0) {
- g_set_error (err,
- rrd_error_quark (), EINVAL, "rrd head cookies error: bad rra or ds count");
- close (fd);
- return FALSE;
- }
- /* Now we can calculate the overall size of rrd */
- head_size = sizeof (struct rrd_file_head) +
- sizeof (struct rrd_ds_def) * head.ds_cnt +
- sizeof (struct rrd_rra_def) * head.rra_cnt +
- sizeof (struct rrd_live_head) +
- sizeof (struct rrd_pdp_prep) * head.ds_cnt +
- sizeof (struct rrd_cdp_prep) * head.ds_cnt * head.rra_cnt +
- sizeof (struct rrd_rra_ptr) * head.rra_cnt;
- if (st.st_size < (goffset)head_size) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd file seems to have stripped header: %d",
- head_size);
- close (fd);
- return FALSE;
- }
-
- if (need_data) {
- /* Now check rra */
- if (lseek (fd, sizeof (struct rrd_ds_def) * head.ds_cnt,
- SEEK_CUR) == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd head lseek error: %s",
- strerror (errno));
- close (fd);
- return FALSE;
- }
- for (i = 0; i < (gint)head.rra_cnt; i++) {
- if (read (fd, &rra, sizeof (rra)) != sizeof (rra)) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd read rra error: %s",
- strerror (errno));
- close (fd);
- return FALSE;
- }
- head_size += rra.row_cnt * head.ds_cnt * sizeof (gdouble);
- }
-
- if (st.st_size != head_size) {
- g_set_error (err,
- rrd_error_quark (), EINVAL, "rrd file seems to have incorrect size: %d, must be %d",
- (gint)st.st_size, head_size);
- close (fd);
- return FALSE;
- }
- }
-
- close (fd);
- return TRUE;
- }
-
- /**
- * Adjust pointers in mmapped rrd file
- * @param file
- */
- static void
- rspamd_rrd_adjust_pointers (struct rspamd_rrd_file *file, gboolean completed)
- {
- guint8 *ptr;
-
- ptr = file->map;
- file->stat_head = (struct rrd_file_head *)ptr;
- ptr += sizeof (struct rrd_file_head);
- file->ds_def = (struct rrd_ds_def *)ptr;
- ptr += sizeof (struct rrd_ds_def) * file->stat_head->ds_cnt;
- file->rra_def = (struct rrd_rra_def *)ptr;
- ptr += sizeof (struct rrd_rra_def) * file->stat_head->rra_cnt;
- file->live_head = (struct rrd_live_head *)ptr;
- ptr += sizeof (struct rrd_live_head);
- file->pdp_prep = (struct rrd_pdp_prep *)ptr;
- ptr += sizeof (struct rrd_pdp_prep) * file->stat_head->ds_cnt;
- file->cdp_prep = (struct rrd_cdp_prep *)ptr;
- ptr += sizeof (struct rrd_cdp_prep) * file->stat_head->rra_cnt *
- file->stat_head->ds_cnt;
- file->rra_ptr = (struct rrd_rra_ptr *)ptr;
- if (completed) {
- ptr += sizeof (struct rrd_rra_ptr) * file->stat_head->rra_cnt;
- file->rrd_value = (gdouble *)ptr;
- }
- else {
- file->rrd_value = NULL;
- }
- }
-
- static void
- rspamd_rrd_calculate_checksum (struct rspamd_rrd_file *file)
- {
- guchar sigbuf[rspamd_cryptobox_HASHBYTES];
- struct rrd_ds_def *ds;
- guint i;
- rspamd_cryptobox_hash_state_t st;
-
- if (file->finalized) {
- rspamd_cryptobox_hash_init (&st, NULL, 0);
- rspamd_cryptobox_hash_update (&st, file->filename, strlen (file->filename));
-
- for (i = 0; i < file->stat_head->ds_cnt; i ++) {
- ds = &file->ds_def[i];
- rspamd_cryptobox_hash_update (&st, ds->ds_nam, sizeof (ds->ds_nam));
- }
-
- rspamd_cryptobox_hash_final (&st, sigbuf);
-
- file->id = rspamd_encode_base32 (sigbuf, sizeof (sigbuf));
- }
- }
-
- static int
- rspamd_rrd_open_exclusive (const gchar *filename)
- {
- struct timespec sleep_ts = {
- .tv_sec = 0,
- .tv_nsec = 1000000
- };
- gint fd;
-
- fd = open (filename, O_RDWR);
-
- if (fd == -1) {
- return -1;
- }
-
- for (;;) {
- if (rspamd_file_lock (fd, TRUE) == -1) {
- if (errno == EAGAIN || errno == EWOULDBLOCK) {
- nanosleep (&sleep_ts, NULL);
- continue;
- }
- else {
- close (fd);
- return -1;
- }
- }
- else {
- break;
- }
- }
-
- return fd;
- };
-
- /**
- * Open completed or incompleted rrd file
- * @param filename
- * @param completed
- * @param err
- * @return
- */
- static struct rspamd_rrd_file *
- rspamd_rrd_open_common (const gchar *filename, gboolean completed, GError **err)
- {
- struct rspamd_rrd_file *file;
- gint fd;
- struct stat st;
-
- if (!rspamd_rrd_check_file (filename, completed, err)) {
- return NULL;
- }
-
- file = g_malloc0 (sizeof (struct rspamd_rrd_file));
-
- /* Open file */
- fd = rspamd_rrd_open_exclusive (filename);
- if (fd == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd open error: %s", strerror (errno));
- g_free (file);
- return FALSE;
- }
-
- if (fstat (fd, &st) == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd stat error: %s", strerror (errno));
- rspamd_file_unlock (fd, FALSE);
- g_free (file);
- close (fd);
- return FALSE;
- }
- /* Mmap file */
- file->size = st.st_size;
- if ((file->map =
- mmap (NULL, st.st_size, PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, 0)) == MAP_FAILED) {
-
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), ENOMEM, "mmap failed: %s", strerror (errno));
- g_free (file);
- return NULL;
- }
-
- file->fd = fd;
-
- /* Adjust pointers */
- rspamd_rrd_adjust_pointers (file, completed);
-
- /* Mark it as finalized */
- file->finalized = completed;
-
- file->filename = g_strdup (filename);
- rspamd_rrd_calculate_checksum (file);
-
- return file;
- }
-
- /**
- * Open (and mmap) existing RRD file
- * @param filename path
- * @param err error pointer
- * @return rrd file structure
- */
- struct rspamd_rrd_file *
- rspamd_rrd_open (const gchar *filename, GError **err)
- {
- struct rspamd_rrd_file *file;
-
- if ((file = rspamd_rrd_open_common (filename, TRUE, err))) {
- msg_info_rrd ("rrd file opened: %s", filename);
- }
-
- return file;
- }
-
- /**
- * Create basic header for rrd file
- * @param filename file path
- * @param ds_count number of data sources
- * @param rra_count number of round robin archives
- * @param pdp_step step of primary data points
- * @param err error pointer
- * @return TRUE if file has been created
- */
- struct rspamd_rrd_file *
- rspamd_rrd_create (const gchar *filename,
- gulong ds_count,
- gulong rra_count,
- gulong pdp_step,
- gdouble initial_ticks,
- GError **err)
- {
- struct rspamd_rrd_file *new;
- struct rrd_file_head head;
- struct rrd_ds_def ds;
- struct rrd_rra_def rra;
- struct rrd_live_head lh;
- struct rrd_pdp_prep pdp;
- struct rrd_cdp_prep cdp;
- struct rrd_rra_ptr rra_ptr;
- gint fd;
- guint i, j;
-
- /* Open file */
- fd = open (filename, O_RDWR | O_CREAT | O_EXCL, 0644);
- if (fd == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd create error: %s",
- strerror (errno));
- return NULL;
- }
-
- rspamd_file_lock (fd, FALSE);
-
- /* Fill header */
- memset (&head, 0, sizeof (head));
- head.rra_cnt = rra_count;
- head.ds_cnt = ds_count;
- head.pdp_step = pdp_step;
- memcpy (head.cookie, RRD_COOKIE, sizeof (head.cookie));
- memcpy (head.version, RRD_VERSION, sizeof (head.version));
- head.float_cookie = RRD_FLOAT_COOKIE;
-
- if (write (fd, &head, sizeof (head)) != sizeof (head)) {
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s", strerror (errno));
- return NULL;
- }
-
- /* Fill DS section */
- memset (&ds, 0, sizeof (ds));
- memset (&ds.ds_nam, 0, sizeof (ds.ds_nam));
- memcpy (&ds.dst, "COUNTER", sizeof ("COUNTER"));
- memset (&ds.par, 0, sizeof (ds.par));
- for (i = 0; i < ds_count; i++) {
- if (write (fd, &ds, sizeof (ds)) != sizeof (ds)) {
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s",
- strerror (errno));
- return NULL;
- }
- }
-
- /* Fill RRA section */
- memset (&rra, 0, sizeof (rra));
- memcpy (&rra.cf_nam, "AVERAGE", sizeof ("AVERAGE"));
- rra.pdp_cnt = 1;
- memset (&rra.par, 0, sizeof (rra.par));
- for (i = 0; i < rra_count; i++) {
- if (write (fd, &rra, sizeof (rra)) != sizeof (rra)) {
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s",
- strerror (errno));
- return NULL;
- }
- }
-
- /* Fill live header */
- memset (&lh, 0, sizeof (lh));
- lh.last_up = (glong)initial_ticks;
- lh.last_up_usec = (glong)((initial_ticks - lh.last_up) * 1e6f);
-
- if (write (fd, &lh, sizeof (lh)) != sizeof (lh)) {
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s", strerror (errno));
- return NULL;
- }
-
- /* Fill pdp prep */
- memset (&pdp, 0, sizeof (pdp));
- memcpy (&pdp.last_ds, "U", sizeof ("U"));
- memset (&pdp.scratch, 0, sizeof (pdp.scratch));
- pdp.scratch[PDP_val].dv = NAN;
- pdp.scratch[PDP_unkn_sec_cnt].lv = 0;
-
- for (i = 0; i < ds_count; i++) {
- if (write (fd, &pdp, sizeof (pdp)) != sizeof (pdp)) {
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s",
- strerror (errno));
- return NULL;
- }
- }
-
- /* Fill cdp prep */
- memset (&cdp, 0, sizeof (cdp));
- memset (&cdp.scratch, 0, sizeof (cdp.scratch));
- cdp.scratch[CDP_val].dv = NAN;
- cdp.scratch[CDP_unkn_pdp_cnt].lv = 0;
-
- for (i = 0; i < rra_count; i++) {
- for (j = 0; j < ds_count; j++) {
- if (write (fd, &cdp, sizeof (cdp)) != sizeof (cdp)) {
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s",
- strerror (errno));
- return NULL;
- }
- }
- }
-
- /* Set row pointers */
- memset (&rra_ptr, 0, sizeof (rra_ptr));
- for (i = 0; i < rra_count; i++) {
- if (write (fd, &rra_ptr, sizeof (rra_ptr)) != sizeof (rra_ptr)) {
- rspamd_file_unlock (fd, FALSE);
- close (fd);
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s",
- strerror (errno));
- return NULL;
- }
- }
-
- rspamd_file_unlock (fd, FALSE);
- close (fd);
-
- new = rspamd_rrd_open_common (filename, FALSE, err);
-
- return new;
- }
-
- /**
- * Add data sources to rrd file
- * @param filename path to file
- * @param ds array of struct rrd_ds_def
- * @param err error pointer
- * @return TRUE if data sources were added
- */
- gboolean
- rspamd_rrd_add_ds (struct rspamd_rrd_file *file, GArray *ds, GError **err)
- {
-
- if (file == NULL || file->stat_head->ds_cnt * sizeof (struct rrd_ds_def) !=
- ds->len) {
- g_set_error (err,
- rrd_error_quark (), EINVAL, "rrd add ds failed: wrong arguments");
- return FALSE;
- }
-
- /* Straightforward memcpy */
- memcpy (file->ds_def, ds->data, ds->len);
-
- return TRUE;
- }
-
- /**
- * Add round robin archives to rrd file
- * @param filename path to file
- * @param ds array of struct rrd_rra_def
- * @param err error pointer
- * @return TRUE if archives were added
- */
- gboolean
- rspamd_rrd_add_rra (struct rspamd_rrd_file *file, GArray *rra, GError **err)
- {
- if (file == NULL || file->stat_head->rra_cnt *
- sizeof (struct rrd_rra_def) != rra->len) {
- g_set_error (err,
- rrd_error_quark (), EINVAL, "rrd add rra failed: wrong arguments");
- return FALSE;
- }
-
- /* Straightforward memcpy */
- memcpy (file->rra_def, rra->data, rra->len);
-
- return TRUE;
- }
-
- /**
- * Finalize rrd file header and initialize all RRA in the file
- * @param filename file path
- * @param err error pointer
- * @return TRUE if rrd file is ready for use
- */
- gboolean
- rspamd_rrd_finalize (struct rspamd_rrd_file *file, GError **err)
- {
- gint fd;
- guint i;
- gint count = 0;
- gdouble vbuf[1024];
- struct stat st;
-
- if (file == NULL || file->filename == NULL || file->fd == -1) {
- g_set_error (err,
- rrd_error_quark (), EINVAL, "rrd add rra failed: wrong arguments");
- return FALSE;
- }
-
- fd = file->fd;
-
- if (lseek (fd, 0, SEEK_END) == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd seek error: %s", strerror (errno));
- close (fd);
- return FALSE;
- }
-
- /* Adjust CDP */
- for (i = 0; i < file->stat_head->rra_cnt; i++) {
- file->cdp_prep->scratch[CDP_unkn_pdp_cnt].lv = 0;
- /* Randomize row pointer (disabled) */
- /* file->rra_ptr->cur_row = g_random_int () % file->rra_def[i].row_cnt; */
- file->rra_ptr->cur_row = file->rra_def[i].row_cnt - 1;
- /* Calculate values count */
- count += file->rra_def[i].row_cnt * file->stat_head->ds_cnt;
- }
-
- munmap (file->map, file->size);
- /* Write values */
- for (i = 0; i < G_N_ELEMENTS (vbuf); i++) {
- vbuf[i] = NAN;
- }
-
- while (count > 0) {
- /* Write values in buffered matter */
- if (write (fd, vbuf,
- MIN ((gint)G_N_ELEMENTS (vbuf), count) * sizeof (gdouble)) == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd write error: %s",
- strerror (errno));
- close (fd);
- return FALSE;
- }
- count -= G_N_ELEMENTS (vbuf);
- }
-
- if (fstat (fd, &st) == -1) {
- g_set_error (err,
- rrd_error_quark (), errno, "rrd stat error: %s", strerror (errno));
- close (fd);
- return FALSE;
- }
-
- /* Mmap again */
- file->size = st.st_size;
- if ((file->map =
- mmap (NULL, st.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd,
- 0)) == MAP_FAILED) {
- close (fd);
- g_set_error (err,
- rrd_error_quark (), ENOMEM, "mmap failed: %s", strerror (errno));
- g_free (file);
- return FALSE;
- }
-
- /* Adjust pointers */
- rspamd_rrd_adjust_pointers (file, TRUE);
-
- file->finalized = TRUE;
- rspamd_rrd_calculate_checksum (file);
- msg_info_rrd ("rrd file created: %s", file->filename);
-
- return TRUE;
- }
-
- /**
- * Update pdp_prep data
- * @param file rrd file
- * @param vals new values
- * @param pdp_new new pdp array
- * @param interval time elapsed from the last update
- * @return
- */
- static gboolean
- rspamd_rrd_update_pdp_prep (struct rspamd_rrd_file *file,
- gdouble *vals,
- gdouble *pdp_new,
- gdouble interval)
- {
- guint i;
- enum rrd_dst_type type;
-
- for (i = 0; i < file->stat_head->ds_cnt; i++) {
- type = rrd_dst_from_string (file->ds_def[i].dst);
-
- if (file->ds_def[i].par[RRD_DS_mrhb_cnt].lv < interval) {
- rspamd_strlcpy (file->pdp_prep[i].last_ds, "U",
- sizeof (file->pdp_prep[i].last_ds));
- pdp_new[i] = NAN;
- msg_debug_rrd ("adding unknown point interval %.3f is less than heartbeat %l",
- interval, file->ds_def[i].par[RRD_DS_mrhb_cnt].lv);
- }
- else {
- switch (type) {
- case RRD_DST_COUNTER:
- case RRD_DST_DERIVE:
- if (file->pdp_prep[i].last_ds[0] == 'U') {
- pdp_new[i] = NAN;
- msg_debug_rrd ("last point is NaN for point %ud", i);
- }
- else {
- pdp_new[i] = vals[i] - strtod (file->pdp_prep[i].last_ds,
- NULL);
- msg_debug_rrd ("new PDP %ud, %.3f", i, pdp_new[i]);
- }
- break;
- case RRD_DST_GAUGE:
- pdp_new[i] = vals[i] * interval;
- msg_debug_rrd ("new PDP %ud, %.3f", i, pdp_new[i]);
- break;
- case RRD_DST_ABSOLUTE:
- pdp_new[i] = vals[i];
- msg_debug_rrd ("new PDP %ud, %.3f", i, pdp_new[i]);
- break;
- default:
- return FALSE;
- }
- }
-
- /* Copy value to the last_ds */
- if (!isnan (vals[i])) {
- rspamd_snprintf (file->pdp_prep[i].last_ds,
- sizeof (file->pdp_prep[i].last_ds), "%.4f", vals[i]);
- }
- else {
- file->pdp_prep[i].last_ds[0] = 'U';
- file->pdp_prep[i].last_ds[1] = '\0';
- }
- }
-
-
- return TRUE;
- }
-
- /**
- * Update step for this pdp
- * @param file
- * @param pdp_new new pdp array
- * @param pdp_temp temp pdp array
- * @param interval time till last update
- * @param pre_int pre interval
- * @param post_int post intervall
- * @param pdp_diff time till last pdp update
- */
- static void
- rspamd_rrd_update_pdp_step (struct rspamd_rrd_file *file,
- gdouble *pdp_new,
- gdouble *pdp_temp,
- gdouble interval,
- gulong pdp_diff)
- {
- guint i;
- rrd_value_t *scratch;
- gulong heartbeat;
-
-
- for (i = 0; i < file->stat_head->ds_cnt; i++) {
- scratch = file->pdp_prep[i].scratch;
- heartbeat = file->ds_def[i].par[RRD_DS_mrhb_cnt].lv;
-
- if (!isnan (pdp_new[i])) {
- if (isnan (scratch[PDP_val].dv)) {
- scratch[PDP_val].dv = 0;
- }
- }
-
- /* Check interval value for heartbeat for this DS */
- if ((interval > heartbeat) ||
- (file->stat_head->pdp_step / 2.0 < scratch[PDP_unkn_sec_cnt].lv)) {
- pdp_temp[i] = NAN;
- }
- else {
- pdp_temp[i] = scratch[PDP_val].dv /
- ((double) (pdp_diff - scratch[PDP_unkn_sec_cnt].lv));
- }
-
- if (isnan (pdp_new[i])) {
- scratch[PDP_unkn_sec_cnt].lv = interval;
- scratch[PDP_val].dv = NAN;
- } else {
- scratch[PDP_unkn_sec_cnt].lv = 0;
- scratch[PDP_val].dv = pdp_new[i] / interval;
- }
-
- msg_debug_rrd ("new temp PDP %ud, %.3f -> %.3f, scratch: %3f",
- i, pdp_new[i], pdp_temp[i],
- scratch[PDP_val].dv);
- }
- }
-
- /**
- * Update CDP for this rra
- * @param file rrd file
- * @param pdp_steps how much pdp steps elapsed from the last update
- * @param pdp_offset offset from pdp
- * @param rra_steps how much steps must be updated for this rra
- * @param rra_index index of desired rra
- * @param pdp_temp temporary pdp points
- */
- static void
- rspamd_rrd_update_cdp (struct rspamd_rrd_file *file,
- gdouble pdp_steps,
- gdouble pdp_offset,
- gulong *rra_steps,
- gulong rra_index,
- gdouble *pdp_temp)
- {
- guint i;
- struct rrd_rra_def *rra;
- rrd_value_t *scratch;
- enum rrd_cf_type cf;
- gdouble last_cdp = INFINITY, cur_cdp = INFINITY;
- gulong pdp_in_cdp;
-
- rra = &file->rra_def[rra_index];
- cf = rrd_cf_from_string (rra->cf_nam);
-
- /* Iterate over all DS for this RRA */
- for (i = 0; i < file->stat_head->ds_cnt; i++) {
- /* Get CDP for this RRA and DS */
- scratch =
- file->cdp_prep[rra_index * file->stat_head->ds_cnt + i].scratch;
- if (rra->pdp_cnt > 1) {
- /* Do we have any CDP to update for this rra ? */
- if (rra_steps[rra_index] > 0) {
-
- if (isnan (pdp_temp[i])) {
- /* New pdp is nan */
- /* Increment unknown points count */
- scratch[CDP_unkn_pdp_cnt].lv += pdp_offset;
- /* Reset secondary value */
- scratch[CDP_secondary_val].dv = NAN;
- }
- else {
- scratch[CDP_secondary_val].dv = pdp_temp[i];
- }
-
- /* Check XFF for this rra */
- if (scratch[CDP_unkn_pdp_cnt].lv > rra->pdp_cnt *
- rra->par[RRA_cdp_xff_val].lv) {
- /* XFF is reached */
- scratch[CDP_primary_val].dv = NAN;
- }
- else {
- /* Need to initialize CDP using specified consolidation */
- switch (cf) {
- case RRD_CF_AVERAGE:
- last_cdp =
- isnan (scratch[CDP_val].dv) ? 0.0 : scratch[CDP_val]
- .dv;
- cur_cdp = isnan (pdp_temp[i]) ? 0.0 : pdp_temp[i];
- scratch[CDP_primary_val].dv =
- (last_cdp + cur_cdp *
- pdp_offset) /
- (rra->pdp_cnt - scratch[CDP_unkn_pdp_cnt].lv);
- break;
- case RRD_CF_MAXIMUM:
- last_cdp =
- isnan (scratch[CDP_val].dv) ? -INFINITY : scratch[
- CDP_val].dv;
- cur_cdp = isnan (pdp_temp[i]) ? -INFINITY : pdp_temp[i];
- scratch[CDP_primary_val].dv = MAX (last_cdp, cur_cdp);
- break;
- case RRD_CF_MINIMUM:
- last_cdp =
- isnan (scratch[CDP_val].dv) ? INFINITY : scratch[
- CDP_val].dv;
- cur_cdp = isnan (pdp_temp[i]) ? INFINITY : pdp_temp[i];
- scratch[CDP_primary_val].dv = MIN (last_cdp, cur_cdp);
- break;
- case RRD_CF_LAST:
- default:
- scratch[CDP_primary_val].dv = pdp_temp[i];
- last_cdp = INFINITY;
- break;
- }
- }
-
- /* Init carry of this CDP */
- pdp_in_cdp = (pdp_steps - pdp_offset) / rra->pdp_cnt;
- if (pdp_in_cdp == 0 || isnan (pdp_temp[i])) {
- /* Set overflow */
- switch (cf) {
- case RRD_CF_AVERAGE:
- scratch[CDP_val].dv = 0;
- break;
- case RRD_CF_MAXIMUM:
- scratch[CDP_val].dv = -INFINITY;
- break;
- case RRD_CF_MINIMUM:
- scratch[CDP_val].dv = INFINITY;
- break;
- default:
- scratch[CDP_val].dv = NAN;
- break;
- }
- }
- else {
- /* Special carry for average */
- if (cf == RRD_CF_AVERAGE) {
- scratch[CDP_val].dv = pdp_temp[i] * pdp_in_cdp;
- }
- else {
- scratch[CDP_val].dv = pdp_temp[i];
- }
- }
-
- scratch[CDP_unkn_pdp_cnt].lv = 0;
-
- msg_debug_rrd ("update cdp for DS %d with value %.3f, "
- "stored value: %.3f, carry: %.3f",
- i, last_cdp,
- scratch[CDP_primary_val].dv, scratch[CDP_val].dv);
- }
- /* In this case we just need to update cdp_prep for this RRA */
- else {
- if (isnan (pdp_temp[i])) {
- /* Just increase undefined zone */
- scratch[CDP_unkn_pdp_cnt].lv += pdp_steps;
- }
- else {
- /* Calculate cdp value */
- last_cdp = scratch[CDP_val].dv;
- switch (cf) {
- case RRD_CF_AVERAGE:
- if (isnan (last_cdp)) {
- scratch[CDP_val].dv = pdp_temp[i] * pdp_steps;
- }
- else {
- scratch[CDP_val].dv = last_cdp + pdp_temp[i] *
- pdp_steps;
- }
- break;
- case RRD_CF_MAXIMUM:
- scratch[CDP_val].dv = MAX (last_cdp, pdp_temp[i]);
- break;
- case RRD_CF_MINIMUM:
- scratch[CDP_val].dv = MIN (last_cdp, pdp_temp[i]);
- break;
- case RRD_CF_LAST:
- scratch[CDP_val].dv = pdp_temp[i];
- break;
- default:
- scratch[CDP_val].dv = NAN;
- break;
- }
- }
-
- msg_debug_rrd ("aggregate cdp %d with pdp %.3f, "
- "stored value: %.3f",
- i, pdp_temp[i], scratch[CDP_val].dv);
- }
- }
- else {
- /* We have nothing to consolidate, but we may miss some pdp */
- if (pdp_steps > 2) {
- /* Just write PDP value */
- scratch[CDP_primary_val].dv = pdp_temp[i];
- scratch[CDP_secondary_val].dv = pdp_temp[i];
- }
- }
- }
- }
-
- /**
- * Update RRA in a file
- * @param file rrd file
- * @param rra_steps steps for each rra
- * @param now current time
- */
- void
- rspamd_rrd_write_rra (struct rspamd_rrd_file *file, gulong *rra_steps)
- {
- guint i, j, ds_cnt;
- struct rrd_rra_def *rra;
- struct rrd_cdp_prep *cdp;
- gdouble *rra_row = file->rrd_value, *cur_row;
-
-
- ds_cnt = file->stat_head->ds_cnt;
- /* Iterate over all RRA */
- for (i = 0; i < file->stat_head->rra_cnt; i++) {
- rra = &file->rra_def[i];
-
- if (rra_steps[i] > 0) {
-
- /* Move row ptr */
- if (++file->rra_ptr[i].cur_row >= rra->row_cnt) {
- file->rra_ptr[i].cur_row = 0;
- }
- /* Calculate seek */
- cdp = &file->cdp_prep[ds_cnt * i];
- cur_row = rra_row + ds_cnt * file->rra_ptr[i].cur_row;
- /* Iterate over DS */
- for (j = 0; j < ds_cnt; j++) {
- cur_row[j] = cdp[j].scratch[CDP_primary_val].dv;
- msg_debug_rrd ("write cdp %d: %.3f", j, cur_row[j]);
- }
- }
-
- rra_row += rra->row_cnt * ds_cnt;
- }
- }
-
- /**
- * Add record to rrd file
- * @param file rrd file object
- * @param points points (must be row suitable for this RRA, depending on ds count)
- * @param err error pointer
- * @return TRUE if a row has been added
- */
- gboolean
- rspamd_rrd_add_record (struct rspamd_rrd_file *file,
- GArray *points,
- gdouble ticks,
- GError **err)
- {
- gdouble interval, *pdp_new, *pdp_temp;
- guint i;
- glong seconds, microseconds;
- gulong pdp_steps, cur_pdp_count, prev_pdp_step, cur_pdp_step,
- prev_pdp_age, cur_pdp_age, *rra_steps, pdp_offset;
-
- if (file == NULL || file->stat_head->ds_cnt * sizeof (gdouble) !=
- points->len) {
- g_set_error (err,
- rrd_error_quark (), EINVAL,
- "rrd add points failed: wrong arguments");
- return FALSE;
- }
-
- /* Get interval */
- seconds = (glong)ticks;
- microseconds = (glong)((ticks - seconds) * 1000000.);
- interval = ticks - ((gdouble)file->live_head->last_up +
- file->live_head->last_up_usec / 1000000.);
-
- msg_debug_rrd ("update rrd record after %.3f seconds", interval);
-
- /* Update PDP preparation values */
- pdp_new = g_malloc0 (sizeof (gdouble) * file->stat_head->ds_cnt);
- pdp_temp = g_malloc0 (sizeof (gdouble) * file->stat_head->ds_cnt);
- /* How much steps need to be updated in each RRA */
- rra_steps = g_malloc0 (sizeof (gulong) * file->stat_head->rra_cnt);
-
- if (!rspamd_rrd_update_pdp_prep (file, (gdouble *)points->data, pdp_new,
- interval)) {
- g_set_error (err,
- rrd_error_quark (), EINVAL,
- "rrd update pdp failed: wrong arguments");
- g_free (pdp_new);
- g_free (pdp_temp);
- g_free (rra_steps);
- return FALSE;
- }
-
- /* Calculate elapsed steps */
- /* Age in seconds for previous pdp store */
- prev_pdp_age = file->live_head->last_up % file->stat_head->pdp_step;
- /* Time in seconds for last pdp update */
- prev_pdp_step = file->live_head->last_up - prev_pdp_age;
- /* Age in seconds from current time to required pdp time */
- cur_pdp_age = seconds % file->stat_head->pdp_step;
- /* Time of desired pdp step */
- cur_pdp_step = seconds - cur_pdp_age;
- cur_pdp_count = cur_pdp_step / file->stat_head->pdp_step;
- pdp_steps = (cur_pdp_step - prev_pdp_step) / file->stat_head->pdp_step;
-
-
- if (pdp_steps == 0) {
- /* Simple update of pdp prep */
- for (i = 0; i < file->stat_head->ds_cnt; i++) {
- if (isnan (pdp_new[i])) {
- /* Increment unknown period */
- file->pdp_prep[i].scratch[PDP_unkn_sec_cnt].lv += floor (
- interval);
- }
- else {
- if (isnan (file->pdp_prep[i].scratch[PDP_val].dv)) {
- /* Reset pdp to the current value */
- file->pdp_prep[i].scratch[PDP_val].dv = pdp_new[i];
- }
- else {
- /* Increment pdp value */
- file->pdp_prep[i].scratch[PDP_val].dv += pdp_new[i];
- }
- }
- }
- }
- else {
- /* Complex update of PDP, CDP and RRA */
-
- /* Update PDP for this step */
- rspamd_rrd_update_pdp_step (file,
- pdp_new,
- pdp_temp,
- interval,
- pdp_steps * file->stat_head->pdp_step);
-
-
- /* Update CDP points for each RRA*/
- for (i = 0; i < file->stat_head->rra_cnt; i++) {
- /* Calculate pdp offset for this RRA */
- pdp_offset = file->rra_def[i].pdp_cnt - cur_pdp_count %
- file->rra_def[i].pdp_cnt;
- /* How much steps we got for this RRA */
- if (pdp_offset <= pdp_steps) {
- rra_steps[i] =
- (pdp_steps - pdp_offset) / file->rra_def[i].pdp_cnt + 1;
- }
- else {
- /* This rra have not passed enough pdp steps */
- rra_steps[i] = 0;
- }
-
- msg_debug_rrd ("cdp: %ud, rra steps: %ul(%ul), pdp steps: %ul",
- i, rra_steps[i], pdp_offset, pdp_steps);
-
- /* Update this specific CDP */
- rspamd_rrd_update_cdp (file,
- pdp_steps,
- pdp_offset,
- rra_steps,
- i,
- pdp_temp);
-
- }
-
- /* Write RRA */
- rspamd_rrd_write_rra (file, rra_steps);
- }
- file->live_head->last_up = seconds;
- file->live_head->last_up_usec = microseconds;
-
- /* Sync and invalidate */
- msync (file->map, file->size, MS_ASYNC | MS_INVALIDATE);
-
- g_free (pdp_new);
- g_free (pdp_temp);
- g_free (rra_steps);
-
- return TRUE;
- }
-
- /**
- * Close rrd file
- * @param file
- * @return
- */
- gint
- rspamd_rrd_close (struct rspamd_rrd_file * file)
- {
- if (file == NULL) {
- errno = EINVAL;
- return -1;
- }
-
- munmap (file->map, file->size);
- close (file->fd);
- g_free (file->filename);
- g_free (file->id);
-
- g_free (file);
-
- return 0;
- }
-
- static struct rspamd_rrd_file *
- rspamd_rrd_create_file (const gchar *path, gboolean finalize, GError **err)
- {
- struct rspamd_rrd_file *file;
- struct rrd_ds_def ds[RSPAMD_RRD_DS_COUNT];
- struct rrd_rra_def rra[RSPAMD_RRD_RRA_COUNT];
- gint i;
- GArray ar;
-
- /* Try to create new rrd file */
-
- file = rspamd_rrd_create (path, RSPAMD_RRD_DS_COUNT, RSPAMD_RRD_RRA_COUNT,
- 1, rspamd_get_calendar_ticks (), err);
-
- if (file == NULL) {
- return NULL;
- }
-
- /* Create DS and RRA */
-
- for (i = METRIC_ACTION_REJECT; i < METRIC_ACTION_MAX; i ++) {
- rrd_make_default_ds (rspamd_action_to_str (i),
- rrd_dst_to_string (RRD_DST_COUNTER), 1, &ds[i]);
- }
-
- ar.data = (gchar *)ds;
- ar.len = sizeof (ds);
-
- if (!rspamd_rrd_add_ds (file, &ar, err)) {
- rspamd_rrd_close (file);
- return NULL;
- }
-
- /* Once per minute for 1 day */
- rrd_make_default_rra (rrd_cf_to_string (RRD_CF_AVERAGE),
- 60, 24 * 60, &rra[0]);
- /* Once per 5 minutes for 1 week */
- rrd_make_default_rra (rrd_cf_to_string (RRD_CF_AVERAGE),
- 5 * 60, 7 * 24 * 60 / 5, &rra[1]);
- /* Once per 10 mins for 1 month */
- rrd_make_default_rra (rrd_cf_to_string (RRD_CF_AVERAGE),
- 60 * 10, 30 * 24 * 6, &rra[2]);
- /* Once per hour for 1 year */
- rrd_make_default_rra (rrd_cf_to_string (RRD_CF_AVERAGE),
- 60 * 60, 365 * 24, &rra[3]);
- ar.data = (gchar *)rra;
- ar.len = sizeof (rra);
-
- if (!rspamd_rrd_add_rra (file, &ar, err)) {
- rspamd_rrd_close (file);
- return NULL;
- }
-
- if (finalize && !rspamd_rrd_finalize (file, err)) {
- rspamd_rrd_close (file);
- return NULL;
- }
-
- return file;
- }
-
- static void
- rspamd_rrd_convert_ds (struct rspamd_rrd_file *old,
- struct rspamd_rrd_file *cur, gint idx_old, gint idx_new)
- {
- struct rrd_pdp_prep *pdp_prep_old, *pdp_prep_new;
- struct rrd_cdp_prep *cdp_prep_old, *cdp_prep_new;
- gdouble *val_old, *val_new;
- gulong rra_cnt, i, j, points_cnt, old_ds, new_ds;
-
- rra_cnt = old->stat_head->rra_cnt;
- pdp_prep_old = &old->pdp_prep[idx_old];
- pdp_prep_new = &cur->pdp_prep[idx_new];
- memcpy (pdp_prep_new, pdp_prep_old, sizeof (*pdp_prep_new));
- val_old = old->rrd_value;
- val_new = cur->rrd_value;
- old_ds = old->stat_head->ds_cnt;
- new_ds = cur->stat_head->ds_cnt;
-
- for (i = 0; i < rra_cnt; i++) {
- cdp_prep_old = &old->cdp_prep[i * old_ds] + idx_old;
- cdp_prep_new = &cur->cdp_prep[i * new_ds] + idx_new;
- memcpy (cdp_prep_new, cdp_prep_old, sizeof (*cdp_prep_new));
- points_cnt = old->rra_def[i].row_cnt;
-
- for (j = 0; j < points_cnt; j ++) {
- val_new[j * new_ds + idx_new] = val_old[j * old_ds + idx_old];
- }
-
- val_new += points_cnt * new_ds;
- val_old += points_cnt * old_ds;
- }
- }
-
- static struct rspamd_rrd_file *
- rspamd_rrd_convert (const gchar *path, struct rspamd_rrd_file *old,
- GError **err)
- {
- struct rspamd_rrd_file *rrd;
- gchar tpath[PATH_MAX];
-
- g_assert (old != NULL);
-
- rspamd_snprintf (tpath, sizeof (tpath), "%s.new", path);
- rrd = rspamd_rrd_create_file (tpath, TRUE, err);
-
- if (rrd) {
- /* Copy old data */
- memcpy (rrd->live_head, old->live_head, sizeof (*rrd->live_head));
- memcpy (rrd->rra_ptr, old->rra_ptr,
- sizeof (*old->rra_ptr) * rrd->stat_head->rra_cnt);
-
- /*
- * Old DSes:
- * 0 - spam -> reject
- * 1 - probable spam -> add header
- * 2 - greylist -> greylist
- * 3 - ham -> ham
- */
- rspamd_rrd_convert_ds (old, rrd, 0, METRIC_ACTION_REJECT);
- rspamd_rrd_convert_ds (old, rrd, 1, METRIC_ACTION_ADD_HEADER);
- rspamd_rrd_convert_ds (old, rrd, 2, METRIC_ACTION_GREYLIST);
- rspamd_rrd_convert_ds (old, rrd, 3, METRIC_ACTION_NOACTION);
-
- if (unlink (path) == -1) {
- g_set_error (err, rrd_error_quark (), errno, "cannot unlink old rrd file %s: %s",
- path, strerror (errno));
- unlink (tpath);
- rspamd_rrd_close (rrd);
-
- return NULL;
- }
-
- if (rename (tpath, path) == -1) {
- g_set_error (err, rrd_error_quark (), errno, "cannot rename old rrd file %s: %s",
- path, strerror (errno));
- unlink (tpath);
- rspamd_rrd_close (rrd);
-
- return NULL;
- }
- }
-
- return rrd;
- }
-
- struct rspamd_rrd_file *
- rspamd_rrd_file_default (const gchar *path,
- GError **err)
- {
- struct rspamd_rrd_file *file, *nf;
-
- g_assert (path != NULL);
-
- if (access (path, R_OK) != -1) {
- /* We can open rrd file */
- file = rspamd_rrd_open (path, err);
-
- if (file == NULL) {
- return NULL;
- }
-
-
- if (file->stat_head->rra_cnt != RSPAMD_RRD_RRA_COUNT) {
- msg_err_rrd ("rrd file is not suitable for rspamd: it has "
- "%ul ds and %ul rra", file->stat_head->ds_cnt,
- file->stat_head->rra_cnt);
- g_set_error (err, rrd_error_quark (), EINVAL, "bad rrd file");
- rspamd_rrd_close (file);
-
- return NULL;
- }
- else if (file->stat_head->ds_cnt == RSPAMD_RRD_OLD_DS_COUNT) {
- /* Old rrd, need to convert */
- msg_info_rrd ("rrd file %s is not suitable for rspamd, convert it",
- path);
-
- nf = rspamd_rrd_convert (path, file, err);
- rspamd_rrd_close (file);
-
- return nf;
- }
- else if (file->stat_head->ds_cnt == RSPAMD_RRD_DS_COUNT) {
- return file;
- }
- else {
- msg_err_rrd ("rrd file is not suitable for rspamd: it has "
- "%ul ds and %ul rra", file->stat_head->ds_cnt,
- file->stat_head->rra_cnt);
- g_set_error (err, rrd_error_quark (), EINVAL, "bad rrd file");
- rspamd_rrd_close (file);
-
- return NULL;
- }
- }
-
- file = rspamd_rrd_create_file (path, TRUE, err);
-
- return file;
- }
-
- struct rspamd_rrd_query_result *
- rspamd_rrd_query (struct rspamd_rrd_file *file,
- gulong rra_num)
- {
- struct rspamd_rrd_query_result *res;
- struct rrd_rra_def *rra;
- const gdouble *rra_offset = NULL;
- guint i;
-
- g_assert (file != NULL);
-
-
- if (rra_num > file->stat_head->rra_cnt) {
- msg_err_rrd ("requested unexisting rra: %l", rra_num);
-
- return NULL;
- }
-
- res = g_malloc0 (sizeof (*res));
- res->ds_count = file->stat_head->ds_cnt;
- res->last_update = (gdouble)file->live_head->last_up +
- ((gdouble)file->live_head->last_up_usec / 1e6f);
- res->pdp_per_cdp = file->rra_def[rra_num].pdp_cnt;
- res->rra_rows = file->rra_def[rra_num].row_cnt;
- rra_offset = file->rrd_value;
-
- for (i = 0; i < file->stat_head->rra_cnt; i++) {
- rra = &file->rra_def[i];
-
- if (i == rra_num) {
- res->cur_row = file->rra_ptr[i].cur_row % rra->row_cnt;
- break;
- }
-
- rra_offset += rra->row_cnt * res->ds_count;
- }
-
- res->data = rra_offset;
-
- return res;
- }
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