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|
/*****************************************************************************
* RRDtool 1.4.7 Copyright by Tobi Oetiker, 1997-2012
*****************************************************************************
* rrd_restore.c Contains logic to parse XML input and create an RRD file
* This file:
* Copyright (C) 2008 Florian octo Forster (original libxml2 code)
* Copyright (C) 2008,2009 Tobias Oetiker
*****************************************************************************
* $Id: rrd_restore.c 2267 2012-01-24 10:08:48Z oetiker $
*************************************************************************** */
#include "rrd_tool.h"
#include "rrd_rpncalc.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libxml/parser.h>
#include <libxml/xmlreader.h>
#include <locale.h>
#ifndef WIN32
# include <unistd.h> /* for off_t */
#else
typedef size_t ssize_t;
typedef long off_t;
#endif
#include <fcntl.h>
#if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
# include <io.h>
# define open _open
# define close _close
#endif
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof ((a)[0]))
static int opt_range_check = 0;
static int opt_force_overwrite = 0;
/*
* Helpers
*/
/* skip all but tags. complain if we do not get the right tag */
/* dept -1 causes depth to be ignored */
static xmlChar* get_xml_element (
xmlTextReaderPtr reader
)
{
while(xmlTextReaderRead(reader)){
int type;
xmlChar *name;
type = xmlTextReaderNodeType(reader);
if (type == XML_READER_TYPE_TEXT){
xmlChar *value;
value = xmlTextReaderValue(reader);
rrd_set_error("line %d: expected element but found text '%s'",
xmlTextReaderGetParserLineNumber(reader),value);
xmlFree(value);
return NULL;
}
/* skip all other non-elements */
if (type != XML_READER_TYPE_ELEMENT && type != XML_READER_TYPE_END_ELEMENT)
continue;
name = xmlTextReaderName(reader);
if (type == XML_READER_TYPE_END_ELEMENT){
xmlChar *temp;
xmlChar *temp2;
temp = (xmlChar*)sprintf_alloc("/%s",name);
temp2 = xmlStrdup(temp);
free(temp);
xmlFree(name);
return temp2;
}
/* all seems well, return the happy news */
return name;
}
rrd_set_error("the xml ended while we were looking for an element");
return NULL;
} /* get_xml_element */
static void local_rrd_free (rrd_t *rrd)
{
free(rrd->live_head);
free(rrd->stat_head);
free(rrd->ds_def);
free(rrd->rra_def);
free(rrd->rra_ptr);
free(rrd->pdp_prep);
free(rrd->cdp_prep);
free(rrd->rrd_value);
free(rrd);
}
static int expect_element (
xmlTextReaderPtr reader,
char *exp_name)
{
xmlChar *name;
name = get_xml_element(reader);
if (!name)
return -1;
if (xmlStrcasecmp(name,(xmlChar *)exp_name) != 0){
rrd_set_error("line %d: expected <%s> element but found <%s>",
xmlTextReaderGetParserLineNumber(reader),name,exp_name);
xmlFree(name);
return -1;
}
xmlFree(name);
return 0;
} /* expect_element */
static int expect_element_end (
xmlTextReaderPtr reader,
char *exp_name)
{
xmlChar *name;
/* maybe we are already on the end element ... lets see */
if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT){
xmlChar *temp;
xmlChar *temp2;
temp = xmlTextReaderName(reader);
temp2 = (xmlChar*)sprintf_alloc("/%s", temp);
name = xmlStrdup(temp2);
xmlFree(temp);
free(temp2);
} else {
name = get_xml_element(reader);
}
if (name == NULL)
return -1;
if (xmlStrcasecmp(name+1,(xmlChar *)exp_name) != 0 || name[0] != '/'){
rrd_set_error("line %d: expected </%s> end element but found <%s>",
xmlTextReaderGetParserLineNumber(reader),exp_name,name);
xmlFree(name);
return -1;
}
xmlFree(name);
return 0;
} /* expect_element_end */
static xmlChar* get_xml_text (
xmlTextReaderPtr reader
)
{
while(xmlTextReaderRead(reader)){
xmlChar *ret;
xmlChar *text;
xmlChar *begin_ptr;
xmlChar *end_ptr;
int type;
type = xmlTextReaderNodeType(reader);
if (type == XML_READER_TYPE_ELEMENT){
xmlChar *name;
name = xmlTextReaderName(reader);
rrd_set_error("line %d: expected a value but found a <%s> element",
xmlTextReaderGetParserLineNumber(reader),
name);
xmlFree(name);
return NULL;
}
/* trying to read text from <a></a> we end up here
lets return an empty string insead. This is a tad optimistic
since we do not check if it is actually </a> and not </b>
we got, but first we do not know if we expect </a> and second
we the whole implementation is on the optimistic side. */
if (type == XML_READER_TYPE_END_ELEMENT){
return xmlStrdup(BAD_CAST "");
}
/* skip all other non-text */
if (type != XML_READER_TYPE_TEXT)
continue;
text = xmlTextReaderValue(reader);
begin_ptr = text;
while ((begin_ptr[0] != 0) && (isspace(begin_ptr[0])))
begin_ptr++;
if (begin_ptr[0] == 0) {
xmlFree(text);
return xmlStrdup(BAD_CAST "");
}
end_ptr = begin_ptr;
while ((end_ptr[0] != 0) && (!isspace(end_ptr[0])))
end_ptr++;
end_ptr[0] = 0;
ret = xmlStrdup(begin_ptr);
xmlFree(text);
return ret;
}
rrd_set_error("file ended while looking for text");
return NULL;
} /* get_xml_text */
static int get_xml_string(
xmlTextReaderPtr reader,
char *value,
int max_len)
{
xmlChar *str;
str = get_xml_text(reader);
if (str != NULL){
strncpy(value,(char *)str,max_len);
xmlFree(str);
return 0;
}
else
return -1;
}
static int get_xml_time_t(
xmlTextReaderPtr reader,
time_t *value)
{
xmlChar *text;
time_t temp;
if ((text = get_xml_text(reader)) != NULL){
errno = 0;
#ifdef TIME_T_IS_32BIT
temp = strtol((char *)text,NULL, 0);
#else
#ifdef TIME_T_IS_64BIT
temp = strtoll((char *)text,NULL, 0);
#else
if (sizeof(time_t) == 4){
temp = strtol((char *)text,NULL, 0);
} else {
temp = strtoll((char *)text,NULL, 0);
}
#endif
#endif
if (errno>0){
rrd_set_error("ling %d: get_xml_time_t from '%s' %s",
xmlTextReaderGetParserLineNumber(reader),
text,rrd_strerror(errno));
xmlFree(text);
return -1;
}
xmlFree(text);
*value = temp;
return 0;
}
return -1;
} /* get_xml_time_t */
static int get_xml_ulong(
xmlTextReaderPtr reader,
unsigned long *value)
{
xmlChar *text;
unsigned long temp;
if ((text = get_xml_text(reader)) != NULL){
errno = 0;
temp = strtoul((char *)text,NULL, 0);
if (errno>0){
rrd_set_error("ling %d: get_xml_ulong from '%s' %s",
xmlTextReaderGetParserLineNumber(reader),
text,rrd_strerror(errno));
xmlFree(text);
return -1;
}
xmlFree(text);
*value = temp;
return 0;
}
return -1;
} /* get_xml_ulong */
static int get_xml_double(
xmlTextReaderPtr reader,
double *value)
{
xmlChar *text;
double temp;
if ((text = get_xml_text(reader))!= NULL){
if (xmlStrcasestr(text,(xmlChar *)"nan")){
*value = DNAN;
xmlFree(text);
return 0;
}
else if (xmlStrcasestr(text,(xmlChar *)"-inf")){
*value = -DINF;
xmlFree(text);
return 0;
}
else if (xmlStrcasestr(text,(xmlChar *)"+inf")
|| xmlStrcasestr(text,(xmlChar *)"inf")){
*value = DINF;
xmlFree(text);
return 0;
}
errno = 0;
temp = strtod((char *)text,NULL);
if (errno>0){
rrd_set_error("ling %d: get_xml_double from '%s' %s",
xmlTextReaderGetParserLineNumber(reader),
text,rrd_strerror(errno));
xmlFree(text);
return -1;
}
xmlFree(text);
*value = temp;
return 0;
}
return -1;
} /* get_xml_double */
static int value_check_range(
rrd_value_t *rrd_value,
const ds_def_t *ds_def)
{
double min;
double max;
if (opt_range_check == 0)
return (0);
min = ds_def->par[DS_min_val].u_val;
max = ds_def->par[DS_max_val].u_val;
if (((!isnan(min)) && (*rrd_value < min))
|| ((!isnan(max)) && (*rrd_value > max)))
*rrd_value = DNAN;
return (0);
} /* int value_check_range */
/*
* Parse the <database> block within an RRA definition
*/
static int parse_tag_rra_database_row(
xmlTextReaderPtr reader,
rrd_t *rrd,
rrd_value_t *rrd_value)
{
unsigned int values_count = 0;
int status;
status = 0;
for (values_count = 0;values_count < rrd->stat_head->ds_cnt;values_count++){
if (expect_element(reader,"v") == 0){
status = get_xml_double(reader,rrd_value + values_count);
if (status == 0)
value_check_range(rrd_value + values_count,
rrd->ds_def + values_count);
else
break;
} else
return -1;
if (expect_element(reader,"/v") == -1){
return -1;
}
}
return status;
} /* int parse_tag_rra_database_row */
static int parse_tag_rra_database(
xmlTextReaderPtr reader,
rrd_t *rrd )
{
rra_def_t *cur_rra_def;
unsigned int total_row_cnt;
int status;
int i;
xmlChar *element;
total_row_cnt = 0;
for (i = 0; i < (((int) rrd->stat_head->rra_cnt) - 1); i++)
total_row_cnt += rrd->rra_def[i].row_cnt;
cur_rra_def = rrd->rra_def + i;
status = 0;
while ((element = get_xml_element(reader)) != NULL){
if (xmlStrcasecmp(element,(const xmlChar *)"row") == 0){
rrd_value_t *temp;
rrd_value_t *cur_rrd_value;
unsigned int total_values_count = rrd->stat_head->ds_cnt
* (total_row_cnt + 1);
/* Allocate space for the new values.. */
temp = (rrd_value_t *) realloc(rrd->rrd_value,
sizeof(rrd_value_t) *
total_values_count);
if (temp == NULL) {
rrd_set_error("parse_tag_rra_database: realloc failed.");
status = -1;
break;
}
rrd->rrd_value = temp;
cur_rrd_value = rrd->rrd_value
+ (rrd->stat_head->ds_cnt * total_row_cnt);
memset(cur_rrd_value, '\0',
sizeof(rrd_value_t) * rrd->stat_head->ds_cnt);
total_row_cnt++;
cur_rra_def->row_cnt++;
status =
parse_tag_rra_database_row(reader, rrd, cur_rrd_value);
if (status == 0)
status = expect_element(reader,"/row");
} /* if (xmlStrcasecmp(element,"row")) */
else {
if ( xmlStrcasecmp(element,(const xmlChar *)"/database") == 0){
xmlFree(element);
break;
}
else {
rrd_set_error("line %d: found unexpected tag: %s",
xmlTextReaderGetParserLineNumber(reader),element);
status = -1;
}
}
xmlFree(element);
if (status != 0)
break;
}
return (status);
} /* int parse_tag_rra_database */
/*
* Parse the <cdp_prep> block within an RRA definition
*/
static int parse_tag_rra_cdp_prep_ds_history(
xmlTextReaderPtr reader,
cdp_prep_t *cdp_prep)
{
/* Make `history_buffer' the same size as the scratch area, plus the
* terminating NULL byte. */
xmlChar *history;
char *history_ptr;
int i;
if ((history = get_xml_text(reader)) != NULL){
history_ptr = (char *) (&cdp_prep->scratch[0]);
for (i = 0; history[i] != '\0'; i++)
history_ptr[i] = (history[i] == '1') ? 1 : 0;
xmlFree(history);
return 0;
}
return -1;
} /* int parse_tag_rra_cdp_prep_ds_history */
static int parse_tag_rra_cdp_prep_ds(
xmlTextReaderPtr reader,
rrd_t *rrd,
cdp_prep_t *cdp_prep)
{
int status;
xmlChar *element;
memset(cdp_prep, '\0', sizeof(cdp_prep_t));
status = -1;
if (atoi(rrd->stat_head->version) == 1) {
cdp_prep->scratch[CDP_primary_val].u_val = 0.0;
cdp_prep->scratch[CDP_secondary_val].u_val = 0.0;
}
while ((element = get_xml_element(reader)) != NULL){
if (xmlStrcasecmp(element, (const xmlChar *) "primary_value") == 0)
status =
get_xml_double(reader,&cdp_prep->scratch[CDP_primary_val].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "secondary_value") == 0)
status =
get_xml_double(reader,&cdp_prep->scratch[CDP_secondary_val].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "intercept") == 0)
status = get_xml_double(reader,
&cdp_prep->
scratch[CDP_hw_intercept].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "last_intercept") ==
0)
status =
get_xml_double(reader,
&cdp_prep->
scratch[CDP_hw_last_intercept].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "slope") == 0)
status = get_xml_double(reader,
&cdp_prep->scratch[CDP_hw_slope].
u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "last_slope") == 0)
status = get_xml_double(reader,
&cdp_prep->
scratch[CDP_hw_last_slope].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "nan_count") == 0)
status = get_xml_ulong(reader,
&cdp_prep->
scratch[CDP_null_count].u_cnt);
else if (xmlStrcasecmp(element, (const xmlChar *) "last_nan_count") ==
0)
status =
get_xml_ulong(reader,
&cdp_prep->
scratch[CDP_last_null_count].u_cnt);
else if (xmlStrcasecmp(element, (const xmlChar *) "seasonal") == 0)
status = get_xml_double(reader,
&cdp_prep->scratch[CDP_hw_seasonal].
u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "last_seasonal") ==
0)
status =
get_xml_double(reader,
&cdp_prep->scratch[CDP_hw_last_seasonal].
u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "init_flag") == 0)
status = get_xml_ulong(reader,
&cdp_prep->
scratch[CDP_init_seasonal].u_cnt);
else if (xmlStrcasecmp(element, (const xmlChar *) "history") == 0)
status = parse_tag_rra_cdp_prep_ds_history(reader, cdp_prep);
else if (xmlStrcasecmp(element, (const xmlChar *) "value") == 0)
status = get_xml_double(reader,
&cdp_prep->scratch[CDP_val].u_val);
else if (xmlStrcasecmp(element,
(const xmlChar *) "unknown_datapoints") == 0)
status = get_xml_ulong(reader,
&cdp_prep->
scratch[CDP_unkn_pdp_cnt].u_cnt);
else if (xmlStrcasecmp(element,
(const xmlChar *) "/ds") == 0){
xmlFree(element);
break;
}
else {
rrd_set_error("parse_tag_rra_cdp_prep: Unknown tag: %s",
element);
status = -1;
xmlFree(element);
break;
}
if (status != 0){
xmlFree(element);
break;
}
status = expect_element_end(reader,(char *)element);
xmlFree(element);
if (status != 0)
break;
}
return (status);
} /* int parse_tag_rra_cdp_prep_ds */
static int parse_tag_rra_cdp_prep(
xmlTextReaderPtr reader,
rrd_t *rrd,
cdp_prep_t *cdp_prep)
{
int status;
unsigned int ds_count;
status = 0;
for ( ds_count = 0; ds_count < rrd->stat_head->ds_cnt;ds_count++){
if (expect_element(reader,"ds") == 0) {
status = parse_tag_rra_cdp_prep_ds(reader, rrd,
cdp_prep + ds_count);
if (status != 0)
break;
} else {
status = -1;
break;
}
}
if (status == 0)
status = expect_element(reader,"/cdp_prep");
return (status);
} /* int parse_tag_rra_cdp_prep */
/*
* Parse the <params> block within an RRA definition
*/
static int parse_tag_rra_params(
xmlTextReaderPtr reader,
rra_def_t *rra_def)
{
xmlChar *element;
int status;
status = -1;
while ((element = get_xml_element(reader)) != NULL){
/*
* Parameters for CF_HWPREDICT
*/
if (xmlStrcasecmp(element, (const xmlChar *) "hw_alpha") == 0)
status = get_xml_double(reader,
&rra_def->par[RRA_hw_alpha].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "hw_beta") == 0)
status = get_xml_double(reader,
&rra_def->par[RRA_hw_beta].u_val);
else if (xmlStrcasecmp(element,
(const xmlChar *) "dependent_rra_idx") == 0)
status = get_xml_ulong(reader,
&rra_def->
par[RRA_dependent_rra_idx].u_cnt);
/*
* Parameters for CF_SEASONAL and CF_DEVSEASONAL
*/
else if (xmlStrcasecmp(element, (const xmlChar *) "seasonal_gamma") ==
0)
status =
get_xml_double(reader,
&rra_def->par[RRA_seasonal_gamma].u_val);
else if (xmlStrcasecmp
(element, (const xmlChar *) "seasonal_smooth_idx") == 0)
status =
get_xml_ulong(reader,
&rra_def->
par[RRA_seasonal_smooth_idx].u_cnt);
else if (xmlStrcasecmp(element, (const xmlChar *) "smoothing_window")
== 0)
status =
get_xml_double(reader,
&rra_def->
par[RRA_seasonal_smoothing_window].
u_val);
/* else if (dependent_rra_idx) ...; */
/*
* Parameters for CF_FAILURES
*/
else if (xmlStrcasecmp(element, (const xmlChar *) "delta_pos") == 0)
status = get_xml_double(reader,
&rra_def->par[RRA_delta_pos].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "delta_neg") == 0)
status = get_xml_double(reader,
&rra_def->par[RRA_delta_neg].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "window_len") == 0)
status = get_xml_ulong(reader,
&rra_def->par[RRA_window_len].
u_cnt);
else if (xmlStrcasecmp(element, (const xmlChar *) "failure_threshold")
== 0)
status =
get_xml_ulong(reader,
&rra_def->
par[RRA_failure_threshold].u_cnt);
/*
* Parameters for CF_AVERAGE, CF_MAXIMUM, CF_MINIMUM, and CF_LAST
*/
else if (xmlStrcasecmp(element, (const xmlChar *) "xff") == 0)
status = get_xml_double(reader,
&rra_def->par[RRA_cdp_xff_val].
u_val);
/*
* Compatibility code for 1.0.49
*/
else if (xmlStrcasecmp(element, (const xmlChar *) "value") == 0) { /* {{{ */
unsigned int i = 0;
for (i=0;i<ARRAY_LENGTH(rra_def->par);i++){
if ((i == RRA_dependent_rra_idx)
|| (i == RRA_seasonal_smooth_idx)
|| (i == RRA_failure_threshold))
status = get_xml_ulong(reader,
&rra_def->par[i].
u_cnt);
else
status = get_xml_double(reader,
&rra_def->par[i].u_val);
if (status != 0)
break;
if ( i-1 < ARRAY_LENGTH(rra_def->par)){
status = expect_element(reader,"/value");
if (status == 0){
status = expect_element(reader,"value");
}
}
if (status != 0){
break;
}
}
} /* }}} */
else if (xmlStrcasecmp(element,(const xmlChar *) "/params") == 0){
xmlFree(element);
return status;
} /* }}} */
else {
rrd_set_error("line %d: parse_tag_rra_params: Unknown tag: %s",
xmlTextReaderGetParserLineNumber(reader),element);
status = -1;
}
status = expect_element_end(reader,(char *)element);
xmlFree(element);
if (status != 0)
break;
}
return (status);
} /* int parse_tag_rra_params */
/*
* Parse an RRA definition
*/
static int parse_tag_rra_cf(
xmlTextReaderPtr reader,
rra_def_t *rra_def)
{
int status;
status = get_xml_string(reader,
rra_def->cf_nam, sizeof(rra_def->cf_nam));
if (status != 0)
return status;
status = cf_conv(rra_def->cf_nam);
if (status == -1) {
rrd_set_error("parse_tag_rra_cf: Unknown consolidation function: %s",
rra_def->cf_nam);
return -1;
}
return 0;
} /* int parse_tag_rra_cf */
static int parse_tag_rra(
xmlTextReaderPtr reader,
rrd_t *rrd)
{
int status;
xmlChar *element;
rra_def_t *cur_rra_def;
cdp_prep_t *cur_cdp_prep;
rra_ptr_t *cur_rra_ptr;
/* Allocate more rra_def space for this RRA */
{ /* {{{ */
rra_def_t *temp;
temp = (rra_def_t *) realloc(rrd->rra_def,
sizeof(rra_def_t) *
(rrd->stat_head->rra_cnt + 1));
if (temp == NULL) {
rrd_set_error("parse_tag_rra: realloc failed.");
return (-1);
}
rrd->rra_def = temp;
cur_rra_def = rrd->rra_def + rrd->stat_head->rra_cnt;
memset(cur_rra_def, '\0', sizeof(rra_def_t));
} /* }}} */
/* allocate cdp_prep_t */
{ /* {{{ */
cdp_prep_t *temp;
temp = (cdp_prep_t *) realloc(rrd->cdp_prep, sizeof(cdp_prep_t)
* rrd->stat_head->ds_cnt
* (rrd->stat_head->rra_cnt + 1));
if (temp == NULL) {
rrd_set_error("parse_tag_rra: realloc failed.");
return (-1);
}
rrd->cdp_prep = temp;
cur_cdp_prep = rrd->cdp_prep
+ (rrd->stat_head->ds_cnt * rrd->stat_head->rra_cnt);
memset(cur_cdp_prep, '\0',
sizeof(cdp_prep_t) * rrd->stat_head->ds_cnt);
} /* }}} */
/* allocate rra_ptr_t */
{ /* {{{ */
rra_ptr_t *temp;
temp = (rra_ptr_t *) realloc(rrd->rra_ptr,
sizeof(rra_ptr_t) *
(rrd->stat_head->rra_cnt + 1));
if (temp == NULL) {
rrd_set_error("parse_tag_rra: realloc failed.");
return (-1);
}
rrd->rra_ptr = temp;
cur_rra_ptr = rrd->rra_ptr + rrd->stat_head->rra_cnt;
memset(cur_rra_ptr, '\0', sizeof(rra_ptr_t));
} /* }}} */
/* All space successfully allocated, increment number of RRAs. */
rrd->stat_head->rra_cnt++;
status = 0;
while ((element = get_xml_element(reader)) != NULL){
if (xmlStrcasecmp(element, (const xmlChar *) "cf") == 0)
status = parse_tag_rra_cf(reader, cur_rra_def);
else if (xmlStrcasecmp(element, (const xmlChar *) "pdp_per_row") == 0)
status = get_xml_ulong(reader,
&cur_rra_def->pdp_cnt);
else if (atoi(rrd->stat_head->version) == 1
&& xmlStrcasecmp(element, (const xmlChar *) "xff") == 0)
status = get_xml_double(reader,
(double *) &cur_rra_def->
par[RRA_cdp_xff_val].u_val);
else if (atoi(rrd->stat_head->version) >= 2
&& xmlStrcasecmp(element, (const xmlChar *) "params") == 0){
xmlFree(element);
status = parse_tag_rra_params(reader, cur_rra_def);
if (status == 0)
continue;
else
return status;
}
else if (xmlStrcasecmp(element, (const xmlChar *) "cdp_prep") == 0){
xmlFree(element);
status = parse_tag_rra_cdp_prep(reader, rrd, cur_cdp_prep);
if (status == 0)
continue;
else
return status;
}
else if (xmlStrcasecmp(element, (const xmlChar *) "database") == 0){
xmlFree(element);
status = parse_tag_rra_database(reader, rrd);
if (status == 0)
continue;
else
return status;
}
else if (xmlStrcasecmp(element,(const xmlChar *) "/rra") == 0){
xmlFree(element);
return status;
} /* }}} */
else {
rrd_set_error("line %d: parse_tag_rra: Unknown tag: %s",
xmlTextReaderGetParserLineNumber(reader), element);
status = -1;
}
if (status != 0) {
xmlFree(element);
return status;
}
status = expect_element_end(reader,(char *)element);
xmlFree(element);
if (status != 0) {
return status;
}
}
/* Set the RRA pointer to a random location */
cur_rra_ptr->cur_row = rrd_random() % cur_rra_def->row_cnt;
return (status);
} /* int parse_tag_rra */
/*
* Parse a DS definition
*/
static int parse_tag_ds_cdef(
xmlTextReaderPtr reader,
rrd_t *rrd)
{
xmlChar *cdef;
cdef = get_xml_text(reader);
if (cdef != NULL){
/* We're always working on the last DS that has been added to the structure
* when we get here */
parseCDEF_DS((char *)cdef, rrd, rrd->stat_head->ds_cnt - 1);
xmlFree(cdef);
if (rrd_test_error())
return -1;
else
return 0;
}
return -1;
} /* int parse_tag_ds_cdef */
static int parse_tag_ds_type(
xmlTextReaderPtr reader,
ds_def_t *ds_def)
{
char *dst;
dst = (char *)get_xml_text(reader);
if (dst != NULL){
int status;
status = dst_conv(dst);
if (status == -1) {
rrd_set_error("parse_tag_ds_type: Unknown data source type: %s",
dst);
return -1;
}
strncpy(ds_def->dst,dst,sizeof(ds_def->dst)-1);
ds_def->dst[sizeof(ds_def->dst)-1] = '\0';
xmlFree(dst);
return 0;
}
return -1;
} /* int parse_tag_ds_type */
static int parse_tag_ds(
xmlTextReaderPtr reader,
rrd_t *rrd)
{
int status;
xmlChar *element;
ds_def_t *cur_ds_def;
pdp_prep_t *cur_pdp_prep;
/*
* If there are DS definitions after RRA definitions the number of values,
* cdp_prep areas and so on will be calculated wrong. Thus, enforce a
* specific order in this case.
*/
if (rrd->stat_head->rra_cnt > 0) {
rrd_set_error("parse_tag_ds: All data source definitions MUST "
"precede the RRA definitions!");
return (-1);
}
/* Allocate space for the new DS definition */
{ /* {{{ */
ds_def_t *temp;
temp = (ds_def_t *) realloc(rrd->ds_def,
sizeof(ds_def_t) *
(rrd->stat_head->ds_cnt + 1));
if (temp == NULL) {
rrd_set_error("parse_tag_ds: malloc failed.");
return (-1);
}
rrd->ds_def = temp;
cur_ds_def = rrd->ds_def + rrd->stat_head->ds_cnt;
memset(cur_ds_def, '\0', sizeof(ds_def_t));
} /* }}} */
/* Allocate pdp_prep space for the new DS definition */
{ /* {{{ */
pdp_prep_t *temp;
temp = (pdp_prep_t *) realloc(rrd->pdp_prep,
sizeof(pdp_prep_t) *
(rrd->stat_head->ds_cnt + 1));
if (temp == NULL) {
rrd_set_error("parse_tag_ds: malloc failed.");
return (-1);
}
rrd->pdp_prep = temp;
cur_pdp_prep = rrd->pdp_prep + rrd->stat_head->ds_cnt;
memset(cur_pdp_prep, '\0', sizeof(pdp_prep_t));
} /* }}} */
/* All allocations successful, let's increment the number of DSes. */
rrd->stat_head->ds_cnt++;
status = 0;
while ((element = get_xml_element(reader)) != NULL){
if (xmlStrcasecmp(element, (const xmlChar *) "name") == 0){
status = get_xml_string(reader,cur_ds_def->ds_nam,sizeof(cur_ds_def->ds_nam));
}
else if (xmlStrcasecmp(element, (const xmlChar *) "type") == 0)
status = parse_tag_ds_type(reader, cur_ds_def);
else if (xmlStrcasecmp(element,
(const xmlChar *) "minimal_heartbeat") == 0)
status = get_xml_ulong(reader,
&cur_ds_def->par[DS_mrhb_cnt].
u_cnt);
else if (xmlStrcasecmp(element, (const xmlChar *) "min") == 0)
status = get_xml_double(reader,
&cur_ds_def->par[DS_min_val].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "max") == 0)
status = get_xml_double(reader,
&cur_ds_def->par[DS_max_val].u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "cdef") == 0)
status = parse_tag_ds_cdef(reader, rrd);
else if (xmlStrcasecmp(element, (const xmlChar *) "last_ds") == 0)
status = get_xml_string(reader,
cur_pdp_prep->last_ds,
sizeof(cur_pdp_prep->last_ds));
else if (xmlStrcasecmp(element, (const xmlChar *) "value") == 0)
status = get_xml_double(reader,
&cur_pdp_prep->scratch[PDP_val].
u_val);
else if (xmlStrcasecmp(element, (const xmlChar *) "unknown_sec") == 0)
status = get_xml_ulong(reader,
&cur_pdp_prep->
scratch[PDP_unkn_sec_cnt].u_cnt);
else if (xmlStrcasecmp(element, (const xmlChar *) "/ds") == 0) {
xmlFree(element);
break;
}
else {
rrd_set_error("parse_tag_ds: Unknown tag: %s", element);
status = -1;
}
if (status != 0) {
xmlFree(element);
break;
}
status = expect_element_end(reader,(char *)element);
xmlFree(element);
if (status != 0)
break;
}
return (status);
} /* int parse_tag_ds */
/*
* Parse root nodes
*/
static int parse_tag_rrd(
xmlTextReaderPtr reader,
rrd_t *rrd)
{
int status;
xmlChar *element;
status = 0;
while ((element = get_xml_element(reader)) != NULL ){
if (xmlStrcasecmp(element, (const xmlChar *) "version") == 0)
status = get_xml_string(reader,
rrd->stat_head->version,
sizeof(rrd->stat_head->version));
else if (xmlStrcasecmp(element, (const xmlChar *) "step") == 0)
status = get_xml_ulong(reader,
&rrd->stat_head->pdp_step);
else if (xmlStrcasecmp(element, (const xmlChar *) "lastupdate") == 0) {
status = get_xml_time_t(reader, &rrd->live_head->last_up);
}
else if (xmlStrcasecmp(element, (const xmlChar *) "ds") == 0){
xmlFree(element);
status = parse_tag_ds(reader, rrd);
/* as we come back the </ds> tag is already gone */
if (status == 0)
continue;
else
return status;
}
else if (xmlStrcasecmp(element, (const xmlChar *) "rra") == 0){
xmlFree(element);
status = parse_tag_rra(reader, rrd);
if (status == 0)
continue;
else
return status;
}
else if (xmlStrcasecmp(element, (const xmlChar *) "/rrd") == 0) {
xmlFree(element);
return status;
}
else {
rrd_set_error("parse_tag_rrd: Unknown tag: %s", element);
status = -1;
}
if (status != 0){
xmlFree(element);
break;
}
status = expect_element_end(reader,(char *)element);
xmlFree(element);
if (status != 0)
break;
}
return (status);
} /* int parse_tag_rrd */
static rrd_t *parse_file(
const char *filename)
{
xmlTextReaderPtr reader;
int status;
rrd_t *rrd;
reader = xmlNewTextReaderFilename(filename);
if (reader == NULL) {
rrd_set_error("Could not create xml reader for: %s",filename);
return (NULL);
}
if (expect_element(reader,"rrd") != 0) {
xmlFreeTextReader(reader);
return (NULL);
}
rrd = (rrd_t *) malloc(sizeof(rrd_t));
if (rrd == NULL) {
rrd_set_error("parse_file: malloc failed.");
xmlFreeTextReader(reader);
return (NULL);
}
memset(rrd, '\0', sizeof(rrd_t));
rrd->stat_head = (stat_head_t *) malloc(sizeof(stat_head_t));
if (rrd->stat_head == NULL) {
rrd_set_error("parse_tag_rrd: malloc failed.");
xmlFreeTextReader(reader);
free(rrd);
return (NULL);
}
memset(rrd->stat_head, '\0', sizeof(stat_head_t));
strncpy(rrd->stat_head->cookie, "RRD", sizeof(rrd->stat_head->cookie));
rrd->stat_head->float_cookie = FLOAT_COOKIE;
rrd->live_head = (live_head_t *) malloc(sizeof(live_head_t));
if (rrd->live_head == NULL) {
rrd_set_error("parse_tag_rrd: malloc failed.");
xmlFreeTextReader(reader);
free(rrd->stat_head);
free(rrd);
return (NULL);
}
memset(rrd->live_head, '\0', sizeof(live_head_t));
status = parse_tag_rrd(reader, rrd);
xmlFreeTextReader(reader);
if (status != 0) {
local_rrd_free(rrd);
rrd = NULL;
}
return (rrd);
} /* rrd_t *parse_file */
static int write_file(
const char *file_name,
rrd_t *rrd)
{
FILE *fh;
unsigned int i;
unsigned int rra_offset;
if (strcmp("-", file_name) == 0)
fh = stdout;
else {
int fd_flags = O_WRONLY | O_CREAT;
int fd;
#if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
fd_flags |= O_BINARY;
#endif
if (opt_force_overwrite == 0)
fd_flags |= O_EXCL;
fd = open(file_name, fd_flags, 0666);
if (fd == -1) {
rrd_set_error("creating '%s': %s", file_name,
rrd_strerror(errno));
return (-1);
}
fh = fdopen(fd, "wb");
if (fh == NULL) {
rrd_set_error("fdopen failed: %s", rrd_strerror(errno));
close(fd);
return (-1);
}
}
if (atoi(rrd->stat_head->version) < 3) {
/* we output 3 or higher */
strcpy(rrd->stat_head->version, "0003");
}
fwrite(rrd->stat_head, sizeof(stat_head_t), 1, fh);
fwrite(rrd->ds_def, sizeof(ds_def_t), rrd->stat_head->ds_cnt, fh);
fwrite(rrd->rra_def, sizeof(rra_def_t), rrd->stat_head->rra_cnt, fh);
fwrite(rrd->live_head, sizeof(live_head_t), 1, fh);
fwrite(rrd->pdp_prep, sizeof(pdp_prep_t), rrd->stat_head->ds_cnt, fh);
fwrite(rrd->cdp_prep, sizeof(cdp_prep_t),
rrd->stat_head->rra_cnt * rrd->stat_head->ds_cnt, fh);
fwrite(rrd->rra_ptr, sizeof(rra_ptr_t), rrd->stat_head->rra_cnt, fh);
/* calculate the number of rrd_values to dump */
rra_offset = 0;
for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
unsigned long num_rows = rrd->rra_def[i].row_cnt;
unsigned long cur_row = rrd->rra_ptr[i].cur_row;
unsigned long ds_cnt = rrd->stat_head->ds_cnt;
if (num_rows > 0){
fwrite(rrd->rrd_value +
(rra_offset + num_rows - 1 - cur_row) * ds_cnt,
sizeof(rrd_value_t), (cur_row + 1) * ds_cnt, fh);
fwrite(rrd->rrd_value + rra_offset * ds_cnt,
sizeof(rrd_value_t), (num_rows - 1 - cur_row) * ds_cnt, fh);
rra_offset += num_rows;
}
}
/* lets see if we had an error */
if (ferror(fh)) {
rrd_set_error("a file error occurred while creating '%s'", file_name);
fclose(fh);
return (-1);
}
fclose(fh);
return (0);
} /* int write_file */
int rrd_restore(
int argc,
char **argv)
{
rrd_t *rrd;
char *old_locale;
/* init rrd clean */
optind = 0;
opterr = 0; /* initialize getopt */
while (42) {
int opt;
int option_index = 0;
static struct option long_options[] = {
{"range-check", no_argument, 0, 'r'},
{"force-overwrite", no_argument, 0, 'f'},
{0, 0, 0, 0}
};
opt = getopt_long(argc, argv, "rf", long_options, &option_index);
if (opt == EOF)
break;
switch (opt) {
case 'r':
opt_range_check = 1;
break;
case 'f':
opt_force_overwrite = 1;
break;
default:
rrd_set_error("usage rrdtool %s [--range-check|-r] "
"[--force-overwrite/-f] file.xml file.rrd",
argv[0]);
return (-1);
break;
}
} /* while (42) */
if ((argc - optind) != 2) {
rrd_set_error("usage rrdtool %s [--range-check/-r] "
"[--force-overwrite/-f] file.xml file.rrd", argv[0]);
return (-1);
}
old_locale = setlocale(LC_NUMERIC, "C");
rrd = parse_file(argv[optind]);
setlocale(LC_NUMERIC, old_locale);
if (rrd == NULL)
return (-1);
if (write_file(argv[optind + 1], rrd) != 0) {
local_rrd_free(rrd);
return (-1);
}
local_rrd_free(rrd);
return (0);
} /* int rrd_restore */
/* vim: set sw=2 sts=2 ts=8 et fdm=marker : */
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