diff --git a/lib/common/xml.c b/lib/common/xml.c
index 1f86cebbaf..458ffcdf20 100644
--- a/lib/common/xml.c
+++ b/lib/common/xml.c
@@ -1,4620 +1,4623 @@
/*
* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <crm_internal.h>
#include <sys/param.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <crm/crm.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <libxml/xmlreader.h>
#if HAVE_BZLIB_H
# include <bzlib.h>
#endif
#if HAVE_LIBXML2
# include <libxml/parser.h>
# include <libxml/tree.h>
# include <libxml/relaxng.h>
#endif
#if HAVE_LIBXSLT
# include <libxslt/xslt.h>
# include <libxslt/transform.h>
#endif
#define XML_BUFFER_SIZE 4096
#define XML_PARSER_DEBUG 0
#define BEST_EFFORT_STATUS 0
void
xml_log(int priority, const char *fmt, ...)
G_GNUC_PRINTF(2, 3);
static inline int
__get_prefix(const char *prefix, xmlNode *xml, char *buffer, int offset);
void
xml_log(int priority, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
qb_log_from_external_source_va(__FUNCTION__, __FILE__, fmt, priority, __LINE__, 0, ap);
va_end(ap);
}
typedef struct {
xmlRelaxNGPtr rng;
xmlRelaxNGValidCtxtPtr valid;
xmlRelaxNGParserCtxtPtr parser;
} relaxng_ctx_cache_t;
struct schema_s {
int type;
const char *name;
const char *location;
const char *transform;
int after_transform;
void *cache;
};
typedef struct {
int found;
const char *string;
} filter_t;
enum xml_private_flags {
xpf_none = 0x000,
xpf_dirty = 0x001,
xpf_deleted = 0x002,
xpf_created = 0x004,
xpf_tracking = 0x010,
xpf_processed = 0x020,
};
typedef struct xml_private_s
{
long check;
uint32_t flags;
GListPtr deleted_paths;
} xml_private_t;
/* *INDENT-OFF* */
struct schema_s known_schemas[] = {
/* 0 */ { 0, NULL, NULL, NULL, 1 },
/* 1 */ { 1, "pacemaker-0.6", "crm.dtd", "upgrade06.xsl", 4, NULL },
/* 2 */ { 1, "transitional-0.6", "crm-transitional.dtd", "upgrade06.xsl", 4, NULL },
/* 3 */ { 2, "pacemaker-0.7", "pacemaker-1.0.rng", NULL, 0, NULL },
/* 4 */ { 2, "pacemaker-1.0", "pacemaker-1.0.rng", NULL, 6, NULL },
/* 5 */ { 2, "pacemaker-1.1", "pacemaker-1.1.rng", NULL, 6, NULL },
/* 6 */ { 2, "pacemaker-1.2", "pacemaker-1.2.rng", NULL, 0, NULL },
/* 7 */ { 0, "none", NULL, NULL, 0, NULL },
};
static filter_t filter[] = {
{ 0, XML_ATTR_ORIGIN },
{ 0, XML_CIB_ATTR_WRITTEN },
{ 0, XML_ATTR_UPDATE_ORIG },
{ 0, XML_ATTR_UPDATE_CLIENT },
{ 0, XML_ATTR_UPDATE_USER },
};
/* *INDENT-ON* */
static int all_schemas = DIMOF(known_schemas);
static int max_schemas = DIMOF(known_schemas) - 2; /* skip back past 'none' */
static xmlNode *subtract_xml_comment(xmlNode * parent, xmlNode * left, xmlNode * right, gboolean * changed);
static xmlNode *find_xml_comment(xmlNode * root, xmlNode * search_comment);
static int add_xml_comment(xmlNode * parent, xmlNode * target, xmlNode * update);
static void save_xml_to_file(xmlNode * xml, const char *desc, const char *filename);
#define CHUNK_SIZE 1024
#define TRACKING_CHANGES(xml) xml->doc?is_set(((xml_private_t *)xml->doc->_private)->flags, xpf_tracking):FALSE
#define buffer_print(buffer, max, offset, fmt, args...) do { \
int rc = (max); \
if(buffer) { \
rc = snprintf((buffer) + (offset), (max) - (offset), fmt, ##args); \
} \
if(rc < 0) { \
crm_perror(LOG_ERR, "snprintf failed"); \
(buffer)[(offset)] = 0; \
return; \
} else if(rc >= ((max) - (offset))) { \
(max) = QB_MAX(CHUNK_SIZE, (max) * 2); \
(buffer) = realloc((buffer), (max) + 1); \
} else { \
offset += rc; \
break; \
} \
} while(1);
static void
insert_prefix(int options, char **buffer, int *offset, int *max, int depth)
{
if (options & xml_log_option_formatted) {
size_t spaces = 2 * depth;
if ((*buffer) == NULL || spaces >= ((*max) - (*offset))) {
(*max) = QB_MAX(CHUNK_SIZE, (*max) * 2);
(*buffer) = realloc((*buffer), (*max) + 1);
}
memset((*buffer) + (*offset), ' ', spaces);
(*offset) += spaces;
}
}
static char *
get_schema_path(const char *file)
{
static const char *base = NULL;
if (base == NULL) {
base = getenv("PCMK_schema_directory");
}
if (base == NULL || strlen(base) == 0) {
base = CRM_DTD_DIRECTORY;
}
return crm_concat(base, file, '/');
}
static void
crm_node_dirty(xmlNode *n)
{
xml_private_t *p = NULL;
if(n && n->doc && n->doc->_private){
/* During calls to xmlDocCopyNode(), n->doc may be unset */
p = n->doc->_private;
p->flags |= xpf_dirty;
}
for(; n; n = n->parent) {
p = n->_private;
if(p == NULL) {
/* During calls to xmlDocCopyNode(), _private will be unset for parent nodes */
} else if(p->flags & xpf_dirty) {
/* All parents can be assumed to be dirty */
break;
} else {
p->flags |= xpf_dirty;
}
}
}
static void
crm_node_created(xmlNode *n)
{
xml_private_t *p = n->_private;
if(p && TRACKING_CHANGES(n)) {
crm_node_dirty(n);
p->flags |= xpf_created;
}
}
static void
crm_attr_dirty(xmlAttr *a)
{
xmlNode *parent = a->parent;
xml_private_t *p = NULL;
p = a->_private;
p->flags |= xpf_dirty;
p->flags = (p->flags & ~xpf_deleted);
p = parent->_private;
if(strcmp((const char *)a->name, XML_ATTR_ID) == 0) {
/* Imply node creation when ID is set */
p->flags |= (xpf_dirty|xpf_created);
}
crm_node_dirty(parent);
}
int get_tag_name(const char *input, size_t offset, size_t max);
int get_attr_name(const char *input, size_t offset, size_t max);
int get_attr_value(const char *input, size_t offset, size_t max);
gboolean can_prune_leaf(xmlNode * xml_node);
void diff_filter_context(int context, int upper_bound, int lower_bound,
xmlNode * xml_node, xmlNode * parent);
int in_upper_context(int depth, int context, xmlNode * xml_node);
int add_xml_object(xmlNode * parent, xmlNode * target, xmlNode * update, gboolean as_diff);
static inline const char *
crm_attr_value(xmlAttr * attr)
{
if (attr == NULL || attr->children == NULL) {
return NULL;
}
return (const char *)attr->children->content;
}
static inline xmlAttr *
crm_first_attr(xmlNode * xml)
{
if (xml == NULL) {
return NULL;
}
return xml->properties;
}
static void
pcmkRegisterNode(xmlNodePtr node)
{
xml_private_t *p = NULL;
/* TODO: Comment nodes? */
switch(node->type) {
case XML_ELEMENT_NODE:
case XML_DOCUMENT_NODE:
case XML_ATTRIBUTE_NODE:
p = calloc(1, sizeof(xml_private_t));
p->check = (long) 0x81726354;
node->_private = p;
break;
case XML_TEXT_NODE:
break;
default:
/* Ignore */
crm_trace("Ignoring %p %d", node, node->type);
break;
}
if(p && TRACKING_CHANGES(node)) {
/* XML_ELEMENT_NODE doesn't get picked up here, node->doc is
* not hooked up at the point we are called
*/
xml_private_t *doc = node->doc->_private;
p->flags |= (xpf_dirty|xpf_created);
doc->flags |= xpf_dirty;
crm_node_dirty(node->parent);
}
}
static void
pcmkDeregisterNode(xmlNodePtr node)
{
xml_private_t *p = node->_private;
switch(node->type) {
case XML_ELEMENT_NODE:
case XML_DOCUMENT_NODE:
case XML_ATTRIBUTE_NODE:
CRM_ASSERT(node->_private != NULL);
CRM_ASSERT(p->check == (long) 0x81726354);
free(node->_private);
break;
default:
break;
}
}
void
xml_track_changes(xmlNode * xml)
{
xml_accept_changes(xml);
crm_trace("Tracking changes to %p", xml);
((xml_private_t *)xml->doc->_private)->flags |= xpf_tracking;
}
bool xml_tracking_changes(xmlNode * xml)
{
if(xml == NULL) {
return FALSE;
} else if(is_set(((xml_private_t *)xml->doc->_private)->flags, xpf_tracking)) {
return TRUE;
}
return FALSE;
}
bool xml_document_dirty(xmlNode *xml)
{
if(xml != NULL && xml->doc && xml->doc->_private) {
xml_private_t *doc = xml->doc->_private;
return is_set(doc->flags, xpf_dirty);
}
return FALSE;
}
/*
<diff format="2.0">
<version>
<source admin_epoch="1" epoch="2" num_updates="3"/>
<target admin_epoch="1" epoch="3" num_updates="0"/>
</version>
<change operation="add" xpath="/cib/configuration/nodes">
<node id="node2" uname="node2" description="foo"/>
</change>
<change operation="add" xpath="/cib/configuration/nodes/node[node2]">
<instance_attributes id="nodes-node"><!-- NOTE: can be a full tree -->
<nvpair id="nodes-node2-ram" name="ram" value="1024M"/>
</instance_attributes>
</change>
<change operation="update" xpath="/cib/configuration/nodes[@id='node2']">
<change-list>
<change-attr operation="set" name="type" value="member"/>
<change-attr operation="unset" name="description"/>
</change-list>
<change-result>
<node id="node2" uname="node2" type="member"/><!-- NOTE: not recursive -->
</change-result>
</change>
<change operation="delete" xpath="/cib/configuration/nodes/node[@id='node3'] /">
<change operation="update" xpath="/cib/configuration/resources/group[@id='g1']">
<change-list>
<change-attr operation="set" name="description" value="some grabage here"/>
</change-list>
<change-result>
<group id="g1" description="some grabage here"/><!-- NOTE: not recursive -->
</change-result>
</change>
<change operation="update" xpath="/cib/status/node_state[@id='node2]/lrm[@id='node2']/lrm_resources/lrm_resource[@id='Fence']">
<change-list>
<change-attr operation="set" name="oper" value="member"/>
<change-attr operation="set" name="operation_key" value="Fence_start_0"/>
<change-attr operation="set" name="operation" value="start"/>
<change-attr operation="set" name="transition-key" value="2:-1:0:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"/>
<change-attr operation="set" name="transition-magic" value="0:0;2:-1:0:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"/>
<change-attr operation="set" name="call-id" value="2"/>
<change-attr operation="set" name="rc-code" value="0"/>
</change-list>
<change-result>
<lrm_rsc_op id="Fence_last_0" operation_key="Fence_start_0" operation="start" crm-debug-origin="crm_simulate" transition-key="2:-1:0:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" transition-magic="0:0;2:-1:0:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" call-id="2" rc-code="0" op-status="0" interval="0" exec-time="0" queue-time="0" op-digest="f2317cad3d54cec5d7d7aa7d0bf35cf8"/>
</change-result>
</change>
</diff>
*/
static void
__xml_build_changes(xmlNode * xml, xmlNode *patchset)
{
xmlNode *cIter = NULL;
xmlAttr *pIter = NULL;
xmlNode *change = NULL;
xml_private_t *p = xml->_private;
if(patchset && is_set(p->flags, xpf_created)) {
int offset = 0;
char buffer[XML_BUFFER_SIZE];
if(__get_prefix(NULL, xml->parent, buffer, offset) > 0) {
change = create_xml_node(patchset, XML_DIFF_CHANGE);
crm_xml_add(change, XML_DIFF_OP, "create");
crm_xml_add(change, XML_DIFF_PATH, buffer);
add_node_copy(change, xml);
}
return;
}
for (pIter = crm_first_attr(xml); pIter != NULL; pIter = pIter->next) {
xmlNode *attr = NULL;
p = pIter->_private;
if(is_not_set(p->flags, xpf_deleted) && is_not_set(p->flags, xpf_dirty)) {
continue;
}
if(change == NULL) {
int offset = 0;
char buffer[XML_BUFFER_SIZE];
if(__get_prefix(NULL, xml, buffer, offset) > 0) {
change = create_xml_node(patchset, XML_DIFF_CHANGE);
crm_xml_add(change, XML_DIFF_OP, "modify");
crm_xml_add(change, XML_DIFF_PATH, buffer);
change = create_xml_node(change, XML_DIFF_LIST);
}
}
attr = create_xml_node(change, XML_DIFF_ATTR);
crm_xml_add(attr, XML_NVPAIR_ATTR_NAME, (const char *)pIter->name);
if(p->flags & xpf_deleted) {
crm_xml_add(attr, XML_DIFF_OP, "unset");
} else {
const char *value = crm_element_value(xml, (const char *)pIter->name);
crm_xml_add(attr, XML_DIFF_OP, "set");
crm_xml_add(attr, XML_NVPAIR_ATTR_VALUE, value);
}
}
for (cIter = __xml_first_child(xml); cIter != NULL; cIter = __xml_next(cIter)) {
__xml_build_changes(cIter, patchset);
}
}
static void
__xml_accept_changes(xmlNode * xml)
{
xmlNode *cIter = NULL;
xmlAttr *pIter = NULL;
xml_private_t *p = xml->_private;
p->flags = xpf_none;
for (pIter = crm_first_attr(xml); pIter != NULL; pIter = pIter->next) {
p = pIter->_private;
if(p->flags & xpf_deleted) {
xml_remove_prop(xml, (const char *)pIter->name);
} else {
p->flags = xpf_none;
}
}
for (cIter = __xml_first_child(xml); cIter != NULL; cIter = __xml_next(cIter)) {
__xml_accept_changes(cIter);
}
}
static bool
is_config_change(xmlNode *xml)
{
GListPtr gIter = NULL;
xml_private_t *p = NULL;
xmlNode *config = first_named_child(xml, XML_CIB_TAG_CONFIGURATION);
if(config) {
p = config->_private;
}
if(p && is_set(p->flags, xpf_dirty)) {
return TRUE;
}
if(xml->doc && xml->doc->_private) {
p = xml->doc->_private;
for(gIter = p->deleted_paths; gIter; gIter = gIter->next) {
char *path = gIter->data;
if(strstr(path, "/"XML_TAG_CIB"/"XML_CIB_TAG_CONFIGURATION) != NULL) {
return TRUE;
}
}
}
return FALSE;
}
static void
xml_repair_v1_diff(xmlNode * last, xmlNode * next, xmlNode * local_diff, gboolean changed)
{
+ int lpc = 0;
xmlNode *cib = NULL;
xmlNode *diff_child = NULL;
const char *tag = NULL;
- const char *value = NULL;
+
+ const char *vfields[] = {
+ XML_ATTR_GENERATION_ADMIN,
+ XML_ATTR_GENERATION,
+ XML_ATTR_NUMUPDATES,
+ };
if (local_diff == NULL) {
crm_trace("Nothing to do");
return;
}
tag = "diff-removed";
diff_child = find_xml_node(local_diff, tag, FALSE);
if (diff_child == NULL) {
diff_child = create_xml_node(local_diff, tag);
}
tag = XML_TAG_CIB;
cib = find_xml_node(diff_child, tag, FALSE);
if (cib == NULL) {
cib = create_xml_node(diff_child, tag);
}
- tag = XML_ATTR_GENERATION_ADMIN;
- value = crm_element_value(last, tag);
- crm_xml_add(diff_child, tag, value);
- if (changed) {
- crm_xml_add(cib, tag, value);
- }
+ for(lpc = 0; lpc < DIMOF(vfields); lpc++){
+ const char *value = crm_element_value(last, vfields[lpc]);
- tag = XML_ATTR_GENERATION;
- value = crm_element_value(last, tag);
- crm_xml_add(diff_child, tag, value);
- if (changed) {
- crm_xml_add(cib, tag, value);
+ crm_xml_add(diff_child, vfields[lpc], value);
+ crm_xml_add(cib, vfields[lpc], value);
}
- tag = XML_ATTR_NUMUPDATES;
- value = crm_element_value(last, tag);
- crm_xml_add(cib, tag, value);
- crm_xml_add(diff_child, tag, value);
-
tag = "diff-added";
diff_child = find_xml_node(local_diff, tag, FALSE);
if (diff_child == NULL) {
diff_child = create_xml_node(local_diff, tag);
}
tag = XML_TAG_CIB;
cib = find_xml_node(diff_child, tag, FALSE);
if (cib == NULL) {
cib = create_xml_node(diff_child, tag);
}
if (next) {
xmlAttrPtr xIter = NULL;
+ for(lpc = 0; lpc < DIMOF(vfields); lpc++){
+ const char *value = crm_element_value(next, vfields[lpc]);
+
+ crm_xml_add(diff_child, vfields[lpc], value);
+ }
+
for (xIter = next->properties; xIter; xIter = xIter->next) {
const char *p_name = (const char *)xIter->name;
const char *p_value = crm_element_value(next, p_name);
xmlSetProp(cib, (const xmlChar *)p_name, (const xmlChar *)p_value);
}
}
crm_log_xml_explicit(local_diff, "Repaired-diff");
}
static xmlNode *
xml_create_patchset_v1(xmlNode *source, xmlNode *target, bool config)
{
const char *version = crm_element_value(target, XML_ATTR_CRM_VERSION);
const char *digest = calculate_xml_versioned_digest(target, FALSE, TRUE, version);
xmlNode *patchset = diff_xml_object(source, target, TRUE);
if(patchset) {
CRM_LOG_ASSERT(xml_document_dirty(target));
xml_repair_v1_diff(source, target, patchset, config);
crm_xml_add(patchset, XML_ATTR_DIGEST, digest);
crm_xml_add(patchset, "format", "1");
}
return patchset;
}
static xmlNode *
xml_create_patchset_v2(xmlNode *source, xmlNode *target)
{
int lpc = 0;
GListPtr gIter = NULL;
xml_private_t *doc = NULL;
xmlNode *v = NULL;
xmlNode *version = NULL;
xmlNode *patchset = NULL;
const char *vfields[] = {
XML_ATTR_GENERATION_ADMIN,
XML_ATTR_GENERATION,
XML_ATTR_NUMUPDATES,
};
CRM_ASSERT(target);
CRM_ASSERT(target->doc);
doc = target->doc->_private;
patchset = create_xml_node(NULL, XML_TAG_DIFF);
crm_xml_add_int(patchset, "format", 2);
version = create_xml_node(patchset, XML_DIFF_VERSION);
v = create_xml_node(version, XML_DIFF_VSOURCE);
for(lpc = 0; lpc < DIMOF(vfields); lpc++){
const char *value = crm_element_value(source, vfields[lpc]);
if(value == NULL) {
value = "1";
}
crm_xml_add(v, vfields[lpc], value);
}
v = create_xml_node(version, XML_DIFF_VTARGET);
for(lpc = 0; lpc < DIMOF(vfields); lpc++){
const char *value = crm_element_value(target, vfields[lpc]);
if(value == NULL) {
value = "1";
}
crm_xml_add(v, vfields[lpc], value);
}
for(gIter = doc->deleted_paths; gIter; gIter = gIter->next) {
xmlNode *change = create_xml_node(patchset, XML_DIFF_CHANGE);
crm_xml_add(change, XML_DIFF_OP, "delete");
crm_xml_add(change, XML_DIFF_PATH, gIter->data);
}
__xml_build_changes(target, patchset);
return patchset;
}
xmlNode *
xml_create_patchset(int format, xmlNode *source, xmlNode *target, bool *config_changed, bool manage_version)
{
int counter = 0;
bool config = FALSE;
config = is_config_change(target);
if(config_changed) {
*config_changed = config;
}
if(manage_version && config) {
crm_xml_add(target, XML_ATTR_NUMUPDATES, "0");
crm_element_value_int(target, XML_ATTR_GENERATION, &counter);
crm_xml_add_int(target, XML_ATTR_GENERATION, counter+1);
} else if(manage_version) {
crm_element_value_int(target, XML_ATTR_NUMUPDATES, &counter);
crm_xml_add_int(target, XML_ATTR_NUMUPDATES, counter+1);
}
switch(format) {
case 1:
return xml_create_patchset_v1(source, target, config);
case 2:
return xml_create_patchset_v2(source, target);
default:
crm_err("Unknown patch format: %d", format);
return NULL;
}
}
void
xml_log_changes(int level, xmlNode *xml)
{
GListPtr gIter = NULL;
xml_private_t *doc = NULL;
CRM_ASSERT(xml);
CRM_ASSERT(xml->doc);
doc = xml->doc->_private;
if(is_not_set(doc->flags, xpf_dirty)) {
return;
}
for(gIter = doc->deleted_paths; gIter; gIter = gIter->next) {
do_crm_log(level, "-- %s", gIter->data);
}
log_data_element(level, __FILE__, __FUNCTION__, __LINE__, "- ", xml, 0,
xml_log_option_formatted|xml_log_option_dirty_del);
log_data_element(level, __FILE__, __FUNCTION__, __LINE__, "+ ", xml, 0,
xml_log_option_formatted|xml_log_option_dirty_add);
}
void
xml_accept_changes(xmlNode * xml)
{
xmlNode *top = NULL;
xml_private_t *doc = NULL;
if(xml == NULL) {
return;
}
crm_trace("Accepting changes to %p", xml);
doc = xml->doc->_private;
top = xmlDocGetRootElement(xml->doc);
doc->flags = (doc->flags & ~xpf_tracking);
if(is_not_set(doc->flags, xpf_dirty)) {
return;
}
xml_log_changes(LOG_DEBUG, xml);
__xml_accept_changes(top);
g_list_free_full(doc->deleted_paths, free);
doc->deleted_paths = NULL;
}
/* Simplified version for applying v1-style XML patches */
static void
__subtract_xml_object(xmlNode * target, xmlNode * patch)
{
xmlNode *patch_child = NULL;
xmlNode *target_child = NULL;
xmlAttrPtr xIter = NULL;
const char *id = NULL;
const char *name = NULL;
const char *value = NULL;
if (target == NULL || patch == NULL) {
return;
}
if (target->type == XML_COMMENT_NODE) {
gboolean dummy;
subtract_xml_comment(target->parent, target, patch, &dummy);
}
id = ID(target);
name = crm_element_name(target);
CRM_CHECK(name != NULL, return);
CRM_CHECK(safe_str_eq(crm_element_name(target), crm_element_name(patch)), return);
CRM_CHECK(safe_str_eq(ID(target), ID(patch)), return);
/* check for XML_DIFF_MARKER in a child */
value = crm_element_value(patch, XML_DIFF_MARKER);
if (value != NULL && strcmp(value, "removed:top") == 0) {
crm_trace("We are the root of the deletion: %s.id=%s", name, id);
free_xml(target);
return;
}
for (xIter = crm_first_attr(patch); xIter != NULL; xIter = xIter->next) {
const char *p_name = (const char *)xIter->name;
xml_remove_prop(target, p_name);
}
/* Restore the id field, it is never allowed to change */
crm_xml_add(target, XML_ATTR_ID, id);
/* changes to child objects */
for (target_child = __xml_first_child(target); target_child != NULL;
target_child = __xml_next(target_child)) {
if (target_child->type == XML_COMMENT_NODE) {
patch_child = find_xml_comment(patch, target_child);
} else {
patch_child = find_entity(patch, crm_element_name(target_child), ID(target_child));
}
__subtract_xml_object(target_child, patch_child);
}
}
static void
__add_xml_object(xmlNode * parent, xmlNode * target, xmlNode * patch)
{
xmlNode *patch_child = NULL;
xmlNode *target_child = NULL;
xmlAttrPtr xIter = NULL;
const char *id = NULL;
const char *name = NULL;
const char *value = NULL;
if (patch == NULL) {
return;
} else if (parent == NULL && target == NULL) {
return;
}
if (target->type == XML_COMMENT_NODE) {
add_xml_comment(parent, target, patch);
}
id = ID(target);
name = crm_element_name(target);
CRM_CHECK(name != NULL, return);
CRM_CHECK(safe_str_eq(crm_element_name(target), crm_element_name(patch)), return);
CRM_CHECK(safe_str_eq(ID(target), ID(patch)), return);
/* check for XML_DIFF_MARKER in a child */
value = crm_element_value(patch, XML_DIFF_MARKER);
if (target == NULL
&& value != NULL
&& strcmp(value, "removed:top") == 0) {
id = ID(patch);
name = crm_element_name(patch);
crm_trace("We are the root of the addition: %s.id=%s", name, id);
add_node_copy(parent, patch);
return;
} else if(target == NULL) {
id = ID(patch);
name = crm_element_name(patch);
crm_err("Could not locate: %s.id=%s", name, id);
return;
}
for (xIter = crm_first_attr(patch); xIter != NULL; xIter = xIter->next) {
const char *p_name = (const char *)xIter->name;
const char *p_value = crm_element_value(patch, p_name);
xml_remove_prop(target, p_name); /* Preserve the patch order */
crm_xml_add(target, p_name, p_value);
}
/* changes to child objects */
for (patch_child = __xml_first_child(patch); patch_child != NULL;
patch_child = __xml_next(patch_child)) {
if (patch_child->type == XML_COMMENT_NODE) {
target_child = find_xml_comment(target, patch_child);
} else {
target_child = find_entity(target, crm_element_name(patch_child), ID(patch_child));
}
__add_xml_object(target, target_child, patch_child);
}
}
static int
xml_patch_version_check(xmlNode *xml, xmlNode *patchset, int format)
{
int lpc = 0;
bool changed = FALSE;
int this[] = { 0, 0, 0 };
int add[] = { 0, 0, 0 };
int del[] = { 0, 0, 0 };
const char *vfields[] = {
XML_ATTR_GENERATION_ADMIN,
XML_ATTR_GENERATION,
XML_ATTR_NUMUPDATES,
};
xmlNode *tmp = NULL;
for(lpc = 0; lpc < DIMOF(vfields); lpc++) {
crm_element_value_int(xml, vfields[lpc], &(this[lpc]));
+ crm_trace("Got %d for this[%s]", this[lpc], vfields[lpc]);
if (this[lpc] < 0) {
this[lpc] = 0;
}
}
switch(format) {
case 1:
tmp = find_xml_node(patchset, "diff-removed", FALSE);
tmp = find_xml_node(tmp, XML_TAG_CIB, FALSE);
break;
case 2:
tmp = find_xml_node(patchset, "version", FALSE);
tmp = find_xml_node(tmp, "source", FALSE);
break;
default:
crm_warn("Unknown patch format: %d", format);
return -EINVAL;
}
for(lpc = 0; lpc < DIMOF(vfields); lpc++) {
crm_element_value_int(tmp, vfields[lpc], &(del[lpc]));
+ crm_trace("Got %d for del[%s]", del[lpc], vfields[lpc]);
}
switch(format) {
case 1:
tmp = find_xml_node(patchset, "diff-added", FALSE);
tmp = find_xml_node(tmp, XML_TAG_CIB, FALSE);
break;
case 2:
tmp = find_xml_node(patchset, "version", FALSE);
tmp = find_xml_node(tmp, "target", FALSE);
break;
default:
crm_warn("Unknown patch format: %d", format);
return -EINVAL;
}
for(lpc = 0; lpc < DIMOF(vfields); lpc++) {
crm_element_value_int(tmp, vfields[lpc], &(add[lpc]));
+ crm_trace("Got %d for add[%s]", add[lpc], vfields[lpc]);
}
if(add[0] == -1 && add[1] == -1 && add[2] == -1) {
add[0] = this[0];
add[1] = this[1];
add[2] = this[2] + 1;
for(lpc = 0; lpc < DIMOF(vfields); lpc++) {
del[lpc] = this[lpc];
}
}
for(lpc = 0; lpc < DIMOF(vfields); lpc++) {
if(this[lpc] < del[lpc]) {
crm_info("Current %s is too low (%d < %d)", vfields[lpc], this[lpc], del[lpc]);
return -pcmk_err_diff_resync;
} else if(this[lpc] > del[lpc]) {
crm_notice("Current %s is too high (%d > %d)", vfields[lpc], this[lpc], del[lpc]);
return -pcmk_err_diff_failed;
}
}
for(lpc = 0; lpc < DIMOF(vfields); lpc++) {
if(add[lpc] > del[lpc]) {
changed = TRUE;
}
}
if(changed == FALSE) {
crm_notice("Versions did not change in patch %d.%d.%d", add[0], add[1], add[2]);
return -pcmk_err_diff_failed;
}
crm_info("Applying patch %d.%d.%d to %d.%d.%d",
this[0], this[1], this[2], add[0], add[1], add[2]);
return pcmk_ok;
}
static int
xml_apply_patchset_v1(xmlNode *xml, xmlNode *patchset, bool check_version)
{
int rc = pcmk_ok;
int root_nodes_seen = 0;
static struct qb_log_callsite *digest_cs = NULL;
const char *digest = crm_element_value(patchset, XML_ATTR_DIGEST);
const char *version = crm_element_value(xml, XML_ATTR_CRM_VERSION);
xmlNode *child_diff = NULL;
xmlNode *added = find_xml_node(patchset, "diff-added", FALSE);
xmlNode *removed = find_xml_node(patchset, "diff-removed", FALSE);
xmlNode *old = copy_xml(xml);
if (digest_cs == NULL) {
digest_cs =
qb_log_callsite_get(__func__, __FILE__, "diff-digest", LOG_TRACE, __LINE__,
crm_trace_nonlog);
}
crm_trace("Substraction Phase");
for (child_diff = __xml_first_child(removed); child_diff != NULL;
child_diff = __xml_next(child_diff)) {
CRM_CHECK(root_nodes_seen == 0, rc = FALSE);
if (root_nodes_seen == 0) {
__subtract_xml_object(xml, child_diff);
}
root_nodes_seen++;
}
if (root_nodes_seen > 1) {
crm_err("(-) Diffs cannot contain more than one change set... saw %d", root_nodes_seen);
rc = -ENOTUNIQ;
}
root_nodes_seen = 0;
crm_trace("Addition Phase");
if (rc == pcmk_ok) {
xmlNode *child_diff = NULL;
for (child_diff = __xml_first_child(added); child_diff != NULL;
child_diff = __xml_next(child_diff)) {
CRM_CHECK(root_nodes_seen == 0, rc = FALSE);
if (root_nodes_seen == 0) {
__add_xml_object(NULL, xml, child_diff);
}
root_nodes_seen++;
}
}
CRM_LOG_ASSERT(digest);
if (root_nodes_seen > 1) {
crm_err("(+) Diffs cannot contain more than one change set... saw %d", root_nodes_seen);
rc = -ENOTUNIQ;
} else if (rc == pcmk_ok && digest) {
char *new_digest = NULL;
purge_diff_markers(xml); /* Purge now so the diff is ok */
new_digest = calculate_xml_versioned_digest(xml, FALSE, TRUE, version);
if (safe_str_neq(new_digest, digest)) {
crm_info("Digest mis-match: expected %s, calculated %s", digest, new_digest);
rc = -pcmk_err_diff_failed;
crm_trace("%p %0.6x", digest_cs, digest_cs ? digest_cs->targets : 0);
if (digest_cs && digest_cs->targets) {
save_xml_to_file(old, "diff:original", NULL);
save_xml_to_file(patchset, "diff:input", NULL);
save_xml_to_file(xml, "diff:new", NULL);
}
} else {
crm_trace("Digest matched: expected %s, calculated %s", digest, new_digest);
}
free(new_digest);
} else if (rc == pcmk_ok) {
purge_diff_markers(xml); /* Purge now so the diff is ok */
}
free_xml(old);
return rc;
}
static int
xml_apply_patchset_v2(xmlNode *xml, xmlNode *patchset, bool check_version)
{
int rc = pcmk_ok;
xmlNode *change = NULL;
for (change = __xml_first_child(patchset); change != NULL; change = __xml_next(change)) {
xmlNode *match = NULL;
const char *op = crm_element_value(change, XML_DIFF_OP);
const char *xpath = crm_element_value(change, XML_DIFF_PATH);
crm_trace("Processing %s %s", change->name, op);
if(op == NULL) {
continue;
}
match = get_xpath_object(xpath, xml, LOG_TRACE);
crm_trace("Performing %s on %s with %p", op, xpath, match);
if(match == NULL && strcmp(op, "delete") == 0) {
crm_debug("No %s match for %s in %p", op, xpath, xml->doc);
continue;
} else if(match == NULL) {
crm_err("No %s match for %s in %p", op, xpath, xml->doc);
rc = -pcmk_err_diff_failed;
continue;
} else if(strcmp(op, "create") == 0) {
add_node_copy(match, change->children);
} else if(strcmp(op, "delete") == 0) {
free_xml(match);
} else if(strcmp(op, "modify") == 0) {
xmlNode *attr = NULL;
for (attr = __xml_first_child(change->children); attr != NULL; attr = __xml_next(attr)) {
const char *name = crm_element_value(attr, XML_NVPAIR_ATTR_NAME);
op = crm_element_value(attr, XML_DIFF_OP);
if(strcmp(op, "set") == 0) {
const char *value = crm_element_value(attr, XML_NVPAIR_ATTR_VALUE);
crm_xml_add(match, name, value);
} else if(strcmp(op, "unset") == 0) {
xml_remove_prop(match, name);
}
}
} else {
crm_err("Unknown operation: %s", op);
}
}
return rc;
}
int
xml_apply_patchset(xmlNode *xml, xmlNode *patchset, bool check_version)
{
int format = 1;
int rc = pcmk_ok;
crm_element_value_int(patchset, "format", &format);
if(check_version) {
rc = xml_patch_version_check(xml, patchset, format);
}
if(rc == pcmk_ok) {
switch(format) {
case 1:
return xml_apply_patchset_v1(xml, patchset, check_version);
case 2:
return xml_apply_patchset_v2(xml, patchset, check_version);
default:
crm_err("Unknown patch format: %d", format);
return -EINVAL;
}
}
return rc;
}
xmlNode *
find_xml_node(xmlNode * root, const char *search_path, gboolean must_find)
{
xmlNode *a_child = NULL;
const char *name = "NULL";
if (root != NULL) {
name = crm_element_name(root);
}
if (search_path == NULL) {
crm_warn("Will never find <NULL>");
return NULL;
}
for (a_child = __xml_first_child(root); a_child != NULL; a_child = __xml_next(a_child)) {
if (strcmp((const char *)a_child->name, search_path) == 0) {
/* crm_trace("returning node (%s).", crm_element_name(a_child)); */
return a_child;
}
}
if (must_find) {
crm_warn("Could not find %s in %s.", search_path, name);
} else if (root != NULL) {
crm_trace("Could not find %s in %s.", search_path, name);
} else {
crm_trace("Could not find %s in <NULL>.", search_path);
}
return NULL;
}
xmlNode *
find_entity(xmlNode * parent, const char *node_name, const char *id)
{
xmlNode *a_child = NULL;
for (a_child = __xml_first_child(parent); a_child != NULL; a_child = __xml_next(a_child)) {
/* Uncertain if node_name == NULL check is strictly necessary here */
if (node_name == NULL || strcmp((const char *)a_child->name, node_name) == 0) {
if (id == NULL || strcmp(id, ID(a_child)) == 0) {
return a_child;
}
}
}
crm_trace("node <%s id=%s> not found in %s.", node_name, id, crm_element_name(parent));
return NULL;
}
void
copy_in_properties(xmlNode * target, xmlNode * src)
{
if (src == NULL) {
crm_warn("No node to copy properties from");
} else if (target == NULL) {
crm_err("No node to copy properties into");
} else {
xmlAttrPtr pIter = NULL;
for (pIter = crm_first_attr(src); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
expand_plus_plus(target, p_name, p_value);
}
}
return;
}
void
fix_plus_plus_recursive(xmlNode * target)
{
/* TODO: Remove recursion and use xpath searches for value++ */
xmlNode *child = NULL;
xmlAttrPtr pIter = NULL;
for (pIter = crm_first_attr(target); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
expand_plus_plus(target, p_name, p_value);
}
for (child = __xml_first_child(target); child != NULL; child = __xml_next(child)) {
fix_plus_plus_recursive(child);
}
}
void
expand_plus_plus(xmlNode * target, const char *name, const char *value)
{
int offset = 1;
int name_len = 0;
int int_value = 0;
int value_len = 0;
const char *old_value = NULL;
if (value == NULL || name == NULL) {
return;
}
old_value = crm_element_value(target, name);
if (old_value == NULL) {
/* if no previous value, set unexpanded */
goto set_unexpanded;
} else if (strstr(value, name) != value) {
goto set_unexpanded;
}
name_len = strlen(name);
value_len = strlen(value);
if (value_len < (name_len + 2)
|| value[name_len] != '+' || (value[name_len + 1] != '+' && value[name_len + 1] != '=')) {
goto set_unexpanded;
}
/* if we are expanding ourselves,
* then no previous value was set and leave int_value as 0
*/
if (old_value != value) {
int_value = char2score(old_value);
}
if (value[name_len + 1] != '+') {
const char *offset_s = value + (name_len + 2);
offset = char2score(offset_s);
}
int_value += offset;
if (int_value > INFINITY) {
int_value = INFINITY;
}
crm_xml_add_int(target, name, int_value);
return;
set_unexpanded:
if (old_value == value) {
/* the old value is already set, nothing to do */
return;
}
crm_xml_add(target, name, value);
return;
}
xmlDoc *
getDocPtr(xmlNode * node)
{
xmlDoc *doc = NULL;
CRM_CHECK(node != NULL, return NULL);
doc = node->doc;
if (doc == NULL) {
doc = xmlNewDoc((const xmlChar *)"1.0");
xmlDocSetRootElement(doc, node);
xmlSetTreeDoc(node, doc);
}
return doc;
}
xmlNode *
add_node_copy(xmlNode * parent, xmlNode * src_node)
{
xmlNode *child = NULL;
xmlDoc *doc = getDocPtr(parent);
CRM_CHECK(src_node != NULL, return NULL);
child = xmlDocCopyNode(src_node, doc, 1);
xmlAddChild(parent, child);
crm_node_created(child);
return child;
}
int
add_node_nocopy(xmlNode * parent, const char *name, xmlNode * child)
{
add_node_copy(parent, child);
free_xml(child);
return 1;
}
const char *
crm_xml_add(xmlNode * node, const char *name, const char *value)
{
bool dirty = FALSE;
xmlAttr *attr = NULL;
CRM_CHECK(node != NULL, return NULL);
CRM_CHECK(name != NULL, return NULL);
if (value == NULL) {
return NULL;
}
#if XML_PARANOIA_CHECKS
{
const char *old_value = NULL;
old_value = crm_element_value(node, name);
/* Could be re-setting the same value */
CRM_CHECK(old_value != value, crm_err("Cannot reset %s with crm_xml_add(%s)", name, value);
return value);
}
#endif
if(TRACKING_CHANGES(node)) {
const char *old = crm_element_value(node, name);
if(old == NULL || value == NULL || strcmp(old, value) != 0) {
dirty = TRUE;
}
}
attr = xmlSetProp(node, (const xmlChar *)name, (const xmlChar *)value);
if(dirty) {
crm_attr_dirty(attr);
}
CRM_CHECK(attr && attr->children && attr->children->content, return NULL);
return (char *)attr->children->content;
}
const char *
crm_xml_replace(xmlNode * node, const char *name, const char *value)
{
bool dirty = FALSE;
xmlAttr *attr = NULL;
const char *old_value = NULL;
CRM_CHECK(node != NULL, return NULL);
CRM_CHECK(name != NULL && name[0] != 0, return NULL);
old_value = crm_element_value(node, name);
/* Could be re-setting the same value */
CRM_CHECK(old_value != value, return value);
if (old_value != NULL && value == NULL) {
xml_remove_prop(node, name);
return NULL;
} else if (value == NULL) {
return NULL;
}
if(TRACKING_CHANGES(node)) {
if(old_value == NULL || value == NULL || strcmp(old_value, value) != 0) {
dirty = TRUE;
}
}
attr = xmlSetProp(node, (const xmlChar *)name, (const xmlChar *)value);
if(dirty) {
crm_attr_dirty(attr);
}
CRM_CHECK(attr && attr->children && attr->children->content, return NULL);
return (char *)attr->children->content;
}
const char *
crm_xml_add_int(xmlNode * node, const char *name, int value)
{
char *number = crm_itoa(value);
const char *added = crm_xml_add(node, name, number);
free(number);
return added;
}
xmlNode *
create_xml_node(xmlNode * parent, const char *name)
{
xmlDoc *doc = NULL;
xmlNode *node = NULL;
if (name == NULL || name[0] == 0) {
return NULL;
}
if (parent == NULL) {
doc = xmlNewDoc((const xmlChar *)"1.0");
node = xmlNewDocRawNode(doc, NULL, (const xmlChar *)name, NULL);
xmlDocSetRootElement(doc, node);
} else {
doc = getDocPtr(parent);
node = xmlNewDocRawNode(doc, NULL, (const xmlChar *)name, NULL);
xmlAddChild(parent, node);
}
crm_node_created(node);
return node;
}
static inline int
__get_prefix(const char *prefix, xmlNode *xml, char *buffer, int offset)
{
const char *id = ID(xml);
if(offset == 0 && prefix == NULL && xml->parent) {
offset = __get_prefix(NULL, xml->parent, buffer, offset);
}
if(id) {
offset += snprintf(buffer + offset, XML_BUFFER_SIZE - offset, "/%s[@id='%s']", (const char *)xml->name, id);
} else if(xml->name) {
offset += snprintf(buffer + offset, XML_BUFFER_SIZE - offset, "/%s", (const char *)xml->name);
}
return offset;
}
static xmlNode *
__first_xml_child_match(xmlNode *parent, const char *name, const char *id)
{
xmlNode *cIter = NULL;
for (cIter = __xml_first_child(parent); cIter != NULL; cIter = __xml_next(cIter)) {
if(strcmp((const char *)cIter->name, name) != 0) {
continue;
} else if(id) {
const char *cid = ID(cIter);
if(cid == NULL || strcmp(cid, id) != 0) {
continue;
}
}
return cIter;
}
return NULL;
}
void
__xml_free_path(xmlNode *top, const char *key);
void
__xml_free_path(xmlNode *top, const char *key)
{
xmlNode *target = top;
char *id = malloc(XML_BUFFER_SIZE);
char *tag = malloc(XML_BUFFER_SIZE);
char *section = malloc(XML_BUFFER_SIZE);
char *current = strdup(key);
char *remainder = malloc(XML_BUFFER_SIZE);
int rc = 0;
while(current) {
rc = sscanf (current, "/%[^/]%s", section, remainder);
if(rc <= 0) {
crm_trace("Done");
break;
} else if(rc > 2) {
crm_trace("Aborting on %s", current);
target = NULL;
break;
} else {
int f = sscanf (section, "%[^[][%s]", tag, id);
switch(f) {
case 1:
target = __first_xml_child_match(target, tag, NULL);
break;
case 2:
target = __first_xml_child_match(target, tag, id);
break;
default:
crm_trace("Aborting on %s", section);
target = NULL;
break;
}
if(rc == 1 || target == NULL) {
crm_trace("Done");
break;
} else {
char *tmp = current;
current = remainder;
remainder = tmp;
}
}
}
if(target) {
char *path = (char *)xmlGetNodePath(target);
crm_trace("Destroying %s for %s", path, key);
free_xml(target);
free(path);
}
free(remainder);
free(current);
free(tag);
}
void
free_xml(xmlNode * child)
{
if (child != NULL) {
xmlNode *top = NULL;
xmlDoc *doc = child->doc;
xml_private_t *p = child->_private;
if (doc != NULL) {
top = xmlDocGetRootElement(doc);
}
if (doc != NULL && top == child) {
/* Free everything */
xmlFreeDoc(doc);
} else {
if(TRACKING_CHANGES(child) && is_not_set(p->flags, xpf_created)) {
int offset = 0;
char buffer[XML_BUFFER_SIZE];
p = doc->_private;
if(__get_prefix(NULL, child, buffer, offset) > 0) {
crm_notice("Deleting %s %p from %p", buffer, child, doc);
p->deleted_paths = g_list_append(p->deleted_paths, strdup(buffer));
p->flags |= xpf_dirty;
}
}
/* Free this particular subtree
* Make sure to unlink it from the parent first
*/
xmlUnlinkNode(child);
xmlFreeNode(child);
}
}
}
xmlNode *
copy_xml(xmlNode * src)
{
xmlDoc *doc = xmlNewDoc((const xmlChar *)"1.0");
xmlNode *copy = xmlDocCopyNode(src, doc, 1);
xmlDocSetRootElement(doc, copy);
xmlSetTreeDoc(copy, doc);
return copy;
}
static void
crm_xml_err(void *ctx, const char *msg, ...)
G_GNUC_PRINTF(2, 3);
static void
crm_xml_err(void *ctx, const char *msg, ...)
{
int len = 0;
va_list args;
char *buf = NULL;
static int buffer_len = 0;
static char *buffer = NULL;
va_start(args, msg);
len = vasprintf(&buf, msg, args);
if (strchr(buf, '\n')) {
buf[len - 1] = 0;
if (buffer) {
crm_err("XML Error: %s%s", buffer, buf);
free(buffer);
} else {
crm_err("XML Error: %s", buf);
}
buffer = NULL;
buffer_len = 0;
} else if (buffer == NULL) {
buffer_len = len;
buffer = buf;
buf = NULL;
} else {
buffer = realloc(buffer, 1 + buffer_len + len);
memcpy(buffer + buffer_len, buf, len);
buffer_len += len;
buffer[buffer_len] = 0;
}
va_end(args);
free(buf);
}
xmlNode *
string2xml(const char *input)
{
xmlNode *xml = NULL;
xmlDocPtr output = NULL;
xmlParserCtxtPtr ctxt = NULL;
xmlErrorPtr last_error = NULL;
if (input == NULL) {
crm_err("Can't parse NULL input");
return NULL;
}
/* create a parser context */
ctxt = xmlNewParserCtxt();
CRM_CHECK(ctxt != NULL, return NULL);
/* xmlCtxtUseOptions(ctxt, XML_PARSE_NOBLANKS|XML_PARSE_RECOVER); */
xmlCtxtResetLastError(ctxt);
xmlSetGenericErrorFunc(ctxt, crm_xml_err);
/* initGenericErrorDefaultFunc(crm_xml_err); */
output =
xmlCtxtReadDoc(ctxt, (const xmlChar *)input, NULL, NULL,
XML_PARSE_NOBLANKS | XML_PARSE_RECOVER);
if (output) {
xml = xmlDocGetRootElement(output);
}
last_error = xmlCtxtGetLastError(ctxt);
if (last_error && last_error->code != XML_ERR_OK) {
/* crm_abort(__FILE__,__PRETTY_FUNCTION__,__LINE__, "last_error->code != XML_ERR_OK", TRUE, TRUE); */
/*
* http://xmlsoft.org/html/libxml-xmlerror.html#xmlErrorLevel
* http://xmlsoft.org/html/libxml-xmlerror.html#xmlParserErrors
*/
crm_warn("Parsing failed (domain=%d, level=%d, code=%d): %s",
last_error->domain, last_error->level, last_error->code, last_error->message);
if (last_error->code == XML_ERR_DOCUMENT_EMPTY) {
crm_abort(__FILE__, __PRETTY_FUNCTION__, __LINE__, "Cannot parse an empty string", TRUE,
TRUE);
} else if (last_error->code != XML_ERR_DOCUMENT_END) {
crm_err("Couldn't%s parse %d chars: %s", xml ? " fully" : "", (int)strlen(input),
input);
if (xml != NULL) {
crm_log_xml_err(xml, "Partial");
}
} else {
int len = strlen(input);
int lpc = 0;
while(lpc < len) {
crm_warn("Parse error[+%.3d]: %.80s", lpc, input+lpc);
lpc += 80;
}
crm_abort(__FILE__, __PRETTY_FUNCTION__, __LINE__, "String parsing error", TRUE, TRUE);
}
}
xmlFreeParserCtxt(ctxt);
return xml;
}
xmlNode *
stdin2xml(void)
{
size_t data_length = 0;
size_t read_chars = 0;
char *xml_buffer = NULL;
xmlNode *xml_obj = NULL;
do {
size_t next = XML_BUFFER_SIZE + data_length + 1;
if(next <= 0) {
crm_err("Buffer size exceeded at: %l + %d", data_length, XML_BUFFER_SIZE);
break;
}
xml_buffer = realloc(xml_buffer, next);
read_chars = fread(xml_buffer + data_length, 1, XML_BUFFER_SIZE, stdin);
data_length += read_chars;
} while (read_chars > 0);
if (data_length == 0) {
crm_warn("No XML supplied on stdin");
free(xml_buffer);
return NULL;
}
xml_buffer[data_length] = '\0';
xml_obj = string2xml(xml_buffer);
free(xml_buffer);
crm_log_xml_trace(xml_obj, "Created fragment");
return xml_obj;
}
static char *
decompress_file(const char *filename)
{
char *buffer = NULL;
#if HAVE_BZLIB_H
int rc = 0;
size_t length = 0, read_len = 0;
BZFILE *bz_file = NULL;
FILE *input = fopen(filename, "r");
if (input == NULL) {
crm_perror(LOG_ERR, "Could not open %s for reading", filename);
return NULL;
}
bz_file = BZ2_bzReadOpen(&rc, input, 0, 0, NULL, 0);
if (rc != BZ_OK) {
BZ2_bzReadClose(&rc, bz_file);
return NULL;
}
rc = BZ_OK;
while (rc == BZ_OK) {
buffer = realloc(buffer, XML_BUFFER_SIZE + length + 1);
read_len = BZ2_bzRead(&rc, bz_file, buffer + length, XML_BUFFER_SIZE);
crm_trace("Read %ld bytes from file: %d", (long)read_len, rc);
if (rc == BZ_OK || rc == BZ_STREAM_END) {
length += read_len;
}
}
buffer[length] = '\0';
read_len = length;
if (rc != BZ_STREAM_END) {
crm_err("Couldnt read compressed xml from file");
free(buffer);
buffer = NULL;
}
BZ2_bzReadClose(&rc, bz_file);
fclose(input);
#else
crm_err("Cannot read compressed files:" " bzlib was not available at compile time");
#endif
return buffer;
}
void
strip_text_nodes(xmlNode * xml)
{
xmlNode *iter = xml->children;
while (iter) {
xmlNode *next = iter->next;
switch (iter->type) {
case XML_TEXT_NODE:
/* Remove it */
xmlUnlinkNode(iter);
xmlFreeNode(iter);
break;
case XML_ELEMENT_NODE:
/* Search it */
strip_text_nodes(iter);
break;
default:
/* Leave it */
break;
}
iter = next;
}
}
xmlNode *
filename2xml(const char *filename)
{
xmlNode *xml = NULL;
xmlDocPtr output = NULL;
const char *match = NULL;
xmlParserCtxtPtr ctxt = NULL;
xmlErrorPtr last_error = NULL;
static int xml_options = XML_PARSE_NOBLANKS | XML_PARSE_RECOVER;
/* create a parser context */
ctxt = xmlNewParserCtxt();
CRM_CHECK(ctxt != NULL, return NULL);
/* xmlCtxtUseOptions(ctxt, XML_PARSE_NOBLANKS|XML_PARSE_RECOVER); */
xmlCtxtResetLastError(ctxt);
xmlSetGenericErrorFunc(ctxt, crm_xml_err);
/* initGenericErrorDefaultFunc(crm_xml_err); */
if (filename) {
match = strstr(filename, ".bz2");
}
if (filename == NULL) {
/* STDIN_FILENO == fileno(stdin) */
output = xmlCtxtReadFd(ctxt, STDIN_FILENO, "unknown.xml", NULL, xml_options);
} else if (match == NULL || match[4] != 0) {
output = xmlCtxtReadFile(ctxt, filename, NULL, xml_options);
} else {
char *input = decompress_file(filename);
output = xmlCtxtReadDoc(ctxt, (const xmlChar *)input, NULL, NULL, xml_options);
free(input);
}
if (output && (xml = xmlDocGetRootElement(output))) {
strip_text_nodes(xml);
}
last_error = xmlCtxtGetLastError(ctxt);
if (last_error && last_error->code != XML_ERR_OK) {
/* crm_abort(__FILE__,__PRETTY_FUNCTION__,__LINE__, "last_error->code != XML_ERR_OK", TRUE, TRUE); */
/*
* http://xmlsoft.org/html/libxml-xmlerror.html#xmlErrorLevel
* http://xmlsoft.org/html/libxml-xmlerror.html#xmlParserErrors
*/
crm_err("Parsing failed (domain=%d, level=%d, code=%d): %s",
last_error->domain, last_error->level, last_error->code, last_error->message);
if (last_error && last_error->code != XML_ERR_OK) {
crm_err("Couldn't%s parse %s", xml ? " fully" : "", filename);
if (xml != NULL) {
crm_log_xml_err(xml, "Partial");
}
}
}
xmlFreeParserCtxt(ctxt);
return xml;
}
static int
write_xml_stream(xmlNode * xml_node, const char *filename, FILE * stream, gboolean compress)
{
int res = 0;
char *buffer = NULL;
unsigned int out = 0;
static mode_t cib_mode = S_IRUSR | S_IWUSR;
CRM_CHECK(stream != NULL, return -1);
crm_trace("Writing XML out to %s", filename);
if (xml_node == NULL) {
crm_err("Cannot write NULL to %s", filename);
fclose(stream);
return -1;
}
crm_log_xml_trace(xml_node, "Writing out");
if(strstr(filename, "cib") != NULL) {
/* Only CIB's need this field written */
time_t now = time(NULL);
char *now_str = ctime(&now);
now_str[24] = EOS; /* replace the newline */
crm_xml_add(xml_node, XML_CIB_ATTR_WRITTEN, now_str);
/* establish the correct permissions */
fchmod(fileno(stream), cib_mode);
}
buffer = dump_xml_formatted(xml_node);
CRM_CHECK(buffer != NULL && strlen(buffer) > 0, crm_log_xml_warn(xml_node, "dump:failed");
goto bail);
if (compress) {
#if HAVE_BZLIB_H
int rc = BZ_OK;
unsigned int in = 0;
BZFILE *bz_file = NULL;
bz_file = BZ2_bzWriteOpen(&rc, stream, 5, 0, 30);
if (rc != BZ_OK) {
crm_err("bzWriteOpen failed: %d", rc);
} else {
BZ2_bzWrite(&rc, bz_file, buffer, strlen(buffer));
if (rc != BZ_OK) {
crm_err("bzWrite() failed: %d", rc);
}
}
if (rc == BZ_OK) {
BZ2_bzWriteClose(&rc, bz_file, 0, &in, &out);
if (rc != BZ_OK) {
crm_err("bzWriteClose() failed: %d", rc);
out = -1;
} else {
crm_trace("%s: In: %d, out: %d", filename, in, out);
}
}
#else
crm_err("Cannot write compressed files:" " bzlib was not available at compile time");
#endif
}
if (out <= 0) {
res = fprintf(stream, "%s", buffer);
if (res < 0) {
crm_perror(LOG_ERR, "Cannot write output to %s", filename);
goto bail;
}
}
bail:
if (fflush(stream) != 0) {
crm_perror(LOG_ERR, "fflush for %s failed:", filename);
res = -1;
}
if (fsync(fileno(stream)) < 0) {
crm_perror(LOG_ERR, "fsync for %s failed:", filename);
res = -1;
}
fclose(stream);
crm_trace("Saved %d bytes to the Cib as XML", res);
free(buffer);
return res;
}
int
write_xml_fd(xmlNode * xml_node, const char *filename, int fd, gboolean compress)
{
FILE *stream = NULL;
CRM_CHECK(fd > 0, return -1);
stream = fdopen(fd, "w");
return write_xml_stream(xml_node, filename, stream, compress);
}
int
write_xml_file(xmlNode * xml_node, const char *filename, gboolean compress)
{
FILE *stream = NULL;
stream = fopen(filename, "w");
return write_xml_stream(xml_node, filename, stream, compress);
}
xmlNode *
get_message_xml(xmlNode * msg, const char *field)
{
xmlNode *tmp = first_named_child(msg, field);
return __xml_first_child(tmp);
}
gboolean
add_message_xml(xmlNode * msg, const char *field, xmlNode * xml)
{
xmlNode *holder = create_xml_node(msg, field);
add_node_copy(holder, xml);
return TRUE;
}
static char *
crm_xml_escape_shuffle(char *text, int start, int *length, const char *replace)
{
int lpc;
int offset = strlen(replace) - 1; /* We have space for 1 char already */
*length += offset;
text = realloc(text, *length);
for (lpc = (*length) - 1; lpc > (start + offset); lpc--) {
text[lpc] = text[lpc - offset];
}
memcpy(text + start, replace, offset + 1);
return text;
}
static char *
crm_xml_escape(const char *text)
{
int index;
int changes = 0;
int length = 1 + strlen(text);
char *copy = strdup(text);
/*
* When xmlCtxtReadDoc() parses < and friends in a
* value, it converts them to their human readable
* form.
*
* If one uses xmlNodeDump() to convert it back to a
* string, all is well, because special characters are
* converted back to their escape sequences.
*
* However xmlNodeDump() is randomly dog slow, even with the same
* input. So we need to replicate the escapeing in our custom
* version so that the result can be re-parsed by xmlCtxtReadDoc()
* when necessary.
*/
for (index = 0; index < length; index++) {
switch (copy[index]) {
case 0:
break;
case '<':
copy = crm_xml_escape_shuffle(copy, index, &length, "<");
changes++;
break;
case '>':
copy = crm_xml_escape_shuffle(copy, index, &length, ">");
changes++;
break;
case '"':
copy = crm_xml_escape_shuffle(copy, index, &length, """);
changes++;
break;
case '\'':
copy = crm_xml_escape_shuffle(copy, index, &length, "'");
changes++;
break;
case '&':
copy = crm_xml_escape_shuffle(copy, index, &length, "&");
changes++;
break;
case '\t':
/* Might as well just expand to a few spaces... */
copy = crm_xml_escape_shuffle(copy, index, &length, " ");
changes++;
break;
case '\n':
/* crm_trace("Convert: \\%.3o", copy[index]); */
copy = crm_xml_escape_shuffle(copy, index, &length, "\\n");
changes++;
break;
case '\r':
copy = crm_xml_escape_shuffle(copy, index, &length, "\\r");
changes++;
break;
/* For debugging...
case '\\':
crm_trace("Passthrough: \\%c", copy[index+1]);
break;
*/
default:
/* Check for and replace non-printing characters with their octal equivalent */
if(copy[index] < ' ' || copy[index] > '~') {
char *replace = g_strdup_printf("\\%.3o", copy[index]);
/* crm_trace("Convert to octal: \\%.3o", copy[index]); */
copy = crm_xml_escape_shuffle(copy, index, &length, replace);
free(replace);
changes++;
}
}
}
if (changes) {
crm_trace("Dumped '%s'", copy);
}
return copy;
}
static inline void
dump_xml_attr(xmlAttrPtr attr, int options, char **buffer, int *offset, int *max)
{
char *p_value = NULL;
const char *p_name = NULL;
if (attr == NULL || attr->children == NULL) {
return;
}
p_name = (const char *)attr->name;
p_value = crm_xml_escape((const char *)attr->children->content);
buffer_print(*buffer, *max, *offset, " %s=\"%s\"", p_name, p_value);
free(p_value);
}
void
log_data_element(int log_level, const char *file, const char *function, int line,
const char *prefix, xmlNode * data, int depth, int options)
{
xmlNode *a_child = NULL;
int max = 0;
int offset = 0;
char *buffer = NULL;
char *prefix_m = NULL;
xmlAttrPtr pIter = NULL;
const char *name = NULL;
const char *hidden = NULL;
if (prefix == NULL) {
prefix = "";
}
/* Since we use the same file and line, to avoid confusing libqb, we need to use the same format strings */
if (data == NULL) {
do_crm_log_alias(log_level, file, function, line, "%s: %s", prefix,
"No data to dump as XML");
return;
}
name = crm_element_name(data);
if(is_set(options, xml_log_option_dirty_add)) {
xml_private_t *p = data->_private;
if(is_set(p->flags, xpf_dirty) && is_set(p->flags, xpf_created)) {
/* Continue and log full subtree */
prefix_m = strdup(prefix);
prefix_m[1] = '+';
prefix = prefix_m;
goto dolog;
} else if(is_set(p->flags, xpf_dirty)) {
char *spaces = calloc(80, 1);
int s_count = 0, s_max = 80;
insert_prefix(options, &spaces, &s_count, &s_max, depth);
prefix_m = strdup(prefix);
prefix_m[1] = '+';
for (pIter = crm_first_attr(data); pIter != NULL; pIter = pIter->next) {
p = pIter->_private;
if(is_set(p->flags, xpf_dirty)) {
const char *aname = (const char*)pIter->name;
const char *value = crm_element_value(data, aname);
if(is_set(p->flags, xpf_created)) {
do_crm_log_alias(log_level, file, function, line,
"%s %s@%s=%s", prefix_m, spaces, aname, value);
} else {
do_crm_log_alias(log_level, file, function, line,
"%s %s@%s=%s", prefix, spaces, aname, value);
}
}
}
free(spaces);
free(prefix_m);
prefix_m = NULL;
goto dolog;
} else {
for (a_child = __xml_first_child(data); a_child != NULL; a_child = __xml_next(a_child)) {
log_data_element(log_level, file, function, line, prefix, a_child, depth + 1, options);
}
return;
}
} else if(is_set(options, xml_log_option_dirty_del)) {
xml_private_t *p = data->_private;
if(is_set(p->flags, xpf_dirty)) {
char *spaces = calloc(80, 1);
int s_count = 0, s_max = 80;
insert_prefix(options, &spaces, &s_count, &s_max, depth);
prefix_m = strdup(prefix);
prefix_m[1] = '-';
for (pIter = crm_first_attr(data); pIter != NULL; pIter = pIter->next) {
p = pIter->_private;
if(is_set(p->flags, xpf_deleted)) {
char *path = (char *)xmlGetNodePath(data);
const char *aname = (const char*)pIter->name;
const char *value = crm_element_value(data, aname);
do_crm_log_alias(log_level, file, function, line,
"%s %s@%s=%s", prefix_m, spaces, aname, value);
free(path);
}
}
for (a_child = __xml_first_child(data); a_child != NULL; a_child = __xml_next(a_child)) {
log_data_element(log_level, file, function, line, prefix, a_child, depth + 1, options);
}
free(prefix_m);
free(spaces);
return;
} else {
for (a_child = __xml_first_child(data); a_child != NULL; a_child = __xml_next(a_child)) {
log_data_element(log_level, file, function, line, prefix, a_child, depth + 1, options);
}
return;
}
}
if (is_set(options, xml_log_option_formatted)) {
if (is_set(options, xml_log_option_diff_plus)
&& (data->children == NULL || crm_element_value(data, XML_DIFF_MARKER))) {
options |= xml_log_option_diff_all;
prefix_m = strdup(prefix);
prefix_m[1] = '+';
prefix = prefix_m;
} else if (is_set(options, xml_log_option_diff_minus)
&& (data->children == NULL || crm_element_value(data, XML_DIFF_MARKER))) {
options |= xml_log_option_diff_all;
prefix_m = strdup(prefix);
prefix_m[1] = '-';
prefix = prefix_m;
}
}
if (is_set(options, xml_log_option_diff_short)
&& is_not_set(options, xml_log_option_diff_all)) {
/* Still searching for the actual change */
for (a_child = __xml_first_child(data); a_child != NULL; a_child = __xml_next(a_child)) {
log_data_element(log_level, file, function, line, prefix, a_child, depth + 1, options);
}
return;
}
dolog:
insert_prefix(options, &buffer, &offset, &max, depth);
if(data->type == XML_COMMENT_NODE) {
buffer_print(buffer, max, offset, "<!--");
buffer_print(buffer, max, offset, "%s", data->content);
buffer_print(buffer, max, offset, "-->");
} else {
buffer_print(buffer, max, offset, "<%s", name);
}
hidden = crm_element_value(data, "hidden");
for (pIter = crm_first_attr(data); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
char *p_copy = NULL;
if ((is_set(options, xml_log_option_diff_plus)
|| is_set(options, xml_log_option_diff_minus))
&& strcmp(XML_DIFF_MARKER, p_name) == 0) {
continue;
} else if (hidden != NULL && p_name[0] != 0 && strstr(hidden, p_name) != NULL) {
p_copy = strdup("*****");
} else {
p_copy = crm_xml_escape(p_value);
}
buffer_print(buffer, max, offset, " %s=\"%s\"", p_name, p_copy);
free(p_copy);
}
if (xml_has_children(data)) {
buffer_print(buffer, max, offset, ">");
} else {
buffer_print(buffer, max, offset, "/>");
}
do_crm_log_alias(log_level, file, function, line, "%s %s", prefix, buffer);
if (data->children && data->type != XML_COMMENT_NODE) {
offset = 0;
max = 0;
free(buffer);
buffer = NULL;
for (a_child = __xml_first_child(data); a_child != NULL; a_child = __xml_next(a_child)) {
log_data_element(log_level, file, function, line, prefix, a_child, depth + 1, options);
}
insert_prefix(options, &buffer, &offset, &max, depth);
buffer_print(buffer, max, offset, "</%s>", name);
do_crm_log_alias(log_level, file, function, line, "%s %s", prefix, buffer);
}
free(prefix_m);
free(buffer);
}
static void
dump_filtered_xml(xmlNode * data, int options, char **buffer, int *offset, int *max)
{
int lpc;
xmlAttrPtr xIter = NULL;
static int filter_len = DIMOF(filter);
for (lpc = 0; options && lpc < filter_len; lpc++) {
filter[lpc].found = FALSE;
}
for (xIter = crm_first_attr(data); xIter != NULL; xIter = xIter->next) {
bool skip = FALSE;
const char *p_name = (const char *)xIter->name;
for (lpc = 0; skip == FALSE && lpc < filter_len; lpc++) {
if (filter[lpc].found == FALSE && strcmp(p_name, filter[lpc].string) == 0) {
filter[lpc].found = TRUE;
skip = TRUE;
break;
}
}
if (skip == FALSE) {
dump_xml_attr(xIter, options, buffer, offset, max);
}
}
}
static void
dump_xml(xmlNode * data, int options, char **buffer, int *offset, int *max, int depth);
static void
dump_xml_element(xmlNode * data, int options, char **buffer, int *offset, int *max, int depth)
{
const char *name = NULL;
CRM_ASSERT(max != NULL);
CRM_ASSERT(offset != NULL);
CRM_ASSERT(buffer != NULL);
if (data == NULL) {
crm_trace("Nothing to dump");
return;
}
if (*buffer == NULL) {
*offset = 0;
*max = 0;
}
name = crm_element_name(data);
CRM_ASSERT(name != NULL);
insert_prefix(options, buffer, offset, max, depth);
buffer_print(*buffer, *max, *offset, "<%s", name);
if (options & xml_log_option_filtered) {
dump_filtered_xml(data, options, buffer, offset, max);
} else {
xmlAttrPtr xIter = NULL;
for (xIter = crm_first_attr(data); xIter != NULL; xIter = xIter->next) {
dump_xml_attr(xIter, options, buffer, offset, max);
}
}
if (data->children == NULL) {
buffer_print(*buffer, *max, *offset, "/>");
} else {
buffer_print(*buffer, *max, *offset, ">");
}
if (options & xml_log_option_formatted) {
buffer_print(*buffer, *max, *offset, "\n");
}
if (data->children) {
xmlNode *xChild = NULL;
for (xChild = __xml_first_child(data); xChild != NULL; xChild = __xml_next(xChild)) {
dump_xml(xChild, options, buffer, offset, max, depth + 1);
}
insert_prefix(options, buffer, offset, max, depth);
buffer_print(*buffer, *max, *offset, "</%s>", name);
if (options & xml_log_option_formatted) {
buffer_print(*buffer, *max, *offset, "\n");
}
}
}
static void
dump_xml_comment(xmlNode * data, int options, char **buffer, int *offset, int *max, int depth)
{
CRM_ASSERT(max != NULL);
CRM_ASSERT(offset != NULL);
CRM_ASSERT(buffer != NULL);
if (data == NULL) {
crm_trace("Nothing to dump");
return;
}
if (*buffer == NULL) {
*offset = 0;
*max = 0;
}
insert_prefix(options, buffer, offset, max, depth);
buffer_print(*buffer, *max, *offset, "<!--");
buffer_print(*buffer, *max, *offset, "%s", data->content);
buffer_print(*buffer, *max, *offset, "-->");
if (options & xml_log_option_formatted) {
buffer_print(*buffer, *max, *offset, "\n");
}
}
static void
dump_xml(xmlNode * data, int options, char **buffer, int *offset, int *max, int depth)
{
#if 0
if (is_not_set(options, xml_log_option_filtered)) {
/* Turning this code on also changes the PE tests for some reason
* (not just newlines). Figure out why before considering to
* enable this permanently.
*
* It exists to help debug slowness in xmlNodeDump() and
* potentially if we ever want to go back to it.
*
* In theory its a good idea (reuse) but our custom version does
* better for the filtered case and avoids the final strdup() for
* everything
*/
time_t now, next;
xmlDoc *doc = NULL;
xmlBuffer *xml_buffer = NULL;
*buffer = NULL;
doc = getDocPtr(data);
/* doc will only be NULL if data is */
CRM_CHECK(doc != NULL, return);
now = time(NULL);
xml_buffer = xmlBufferCreate();
CRM_ASSERT(xml_buffer != NULL);
/* The default allocator XML_BUFFER_ALLOC_EXACT does far too many
* realloc()s and it can take upwards of 18 seconds (yes, seconds)
* to dump a 28kb tree which XML_BUFFER_ALLOC_DOUBLEIT can do in
* less than 1 second.
*
* We could also use xmlBufferCreateSize() to start with a
* sane-ish initial size and avoid the first few doubles.
*/
xmlBufferSetAllocationScheme(xml_buffer, XML_BUFFER_ALLOC_DOUBLEIT);
*max = xmlNodeDump(xml_buffer, doc, data, 0, (options & xml_log_option_formatted));
if (*max > 0) {
*buffer = strdup((char *)xml_buffer->content);
}
next = time(NULL);
if ((now + 1) < next) {
crm_log_xml_trace(data, "Long time");
crm_err("xmlNodeDump() -> %dbytes took %ds", *max, next - now);
}
xmlBufferFree(xml_buffer);
return;
}
#endif
switch(data->type) {
case XML_ELEMENT_NODE:
/* Handle below */
dump_xml_element(data, options, buffer, offset, max, depth);
break;
case XML_TEXT_NODE:
/* Ignore */
return;
case XML_COMMENT_NODE:
dump_xml_comment(data, options, buffer, offset, max, depth);
break;
default:
crm_warn("Unhandled type: %d", data->type);
return;
/*
XML_ATTRIBUTE_NODE = 2
XML_CDATA_SECTION_NODE = 4
XML_ENTITY_REF_NODE = 5
XML_ENTITY_NODE = 6
XML_PI_NODE = 7
XML_DOCUMENT_NODE = 9
XML_DOCUMENT_TYPE_NODE = 10
XML_DOCUMENT_FRAG_NODE = 11
XML_NOTATION_NODE = 12
XML_HTML_DOCUMENT_NODE = 13
XML_DTD_NODE = 14
XML_ELEMENT_DECL = 15
XML_ATTRIBUTE_DECL = 16
XML_ENTITY_DECL = 17
XML_NAMESPACE_DECL = 18
XML_XINCLUDE_START = 19
XML_XINCLUDE_END = 20
XML_DOCB_DOCUMENT_NODE = 21
*/
}
}
static void
fix_digest_buffer(char **buffer, int *offset, int *max, char c)
{
buffer_print(*buffer, *max, *offset, "%c", c);
}
static char *
dump_xml_for_digest(xmlNode * an_xml_node)
{
char *buffer = NULL;
int offset = 0, max = 0;
/* for compatability with the old result which is used for v1 digests */
fix_digest_buffer(&buffer, &offset, &max, ' ');
dump_xml(an_xml_node, 0, &buffer, &offset, &max, 0);
fix_digest_buffer(&buffer, &offset, &max, '\n');
return buffer;
}
char *
dump_xml_formatted(xmlNode * an_xml_node)
{
char *buffer = NULL;
int offset = 0, max = 0;
dump_xml(an_xml_node, xml_log_option_formatted, &buffer, &offset, &max, 0);
return buffer;
}
char *
dump_xml_unformatted(xmlNode * an_xml_node)
{
char *buffer = NULL;
int offset = 0, max = 0;
dump_xml(an_xml_node, 0, &buffer, &offset, &max, 0);
return buffer;
}
gboolean
xml_has_children(const xmlNode * xml_root)
{
if (xml_root != NULL && xml_root->children != NULL) {
return TRUE;
}
return FALSE;
}
int
crm_element_value_int(xmlNode * data, const char *name, int *dest)
{
const char *value = crm_element_value(data, name);
CRM_CHECK(dest != NULL, return -1);
if (value) {
*dest = crm_int_helper(value, NULL);
return 0;
}
return -1;
}
int
crm_element_value_const_int(const xmlNode * data, const char *name, int *dest)
{
return crm_element_value_int((xmlNode *) data, name, dest);
}
const char *
crm_element_value_const(const xmlNode * data, const char *name)
{
return crm_element_value((xmlNode *) data, name);
}
char *
crm_element_value_copy(xmlNode * data, const char *name)
{
char *value_copy = NULL;
const char *value = crm_element_value(data, name);
if (value != NULL) {
value_copy = strdup(value);
}
return value_copy;
}
void
xml_remove_prop(xmlNode * obj, const char *name)
{
if(TRACKING_CHANGES(obj)) {
/* Leave in place (marked for removal) until after the diff is calculated */
xml_private_t *p = obj->_private;
p->flags |= xpf_dirty;
} else {
xmlUnsetProp(obj, (const xmlChar *)name);
}
}
void
log_xml_diff(uint8_t log_level, xmlNode * diff, const char *function)
{
xmlNode *child = NULL;
xmlNode *added = find_xml_node(diff, "diff-added", FALSE);
xmlNode *removed = find_xml_node(diff, "diff-removed", FALSE);
gboolean is_first = TRUE;
int options = xml_log_option_formatted;
static struct qb_log_callsite *diff_cs = NULL;
if (diff_cs == NULL) {
diff_cs = qb_log_callsite_get(function, __FILE__, "xml-diff", log_level, __LINE__, 0);
}
if (crm_is_callsite_active(diff_cs, log_level, 0) == FALSE) {
return;
}
if (log_level < LOG_DEBUG || function == NULL) {
options |= xml_log_option_diff_short;
}
for (child = __xml_first_child(removed); child != NULL; child = __xml_next(child)) {
log_data_element(log_level, __FILE__, function, __LINE__, "- ", child, 0,
options | xml_log_option_diff_minus);
if (is_first) {
is_first = FALSE;
} else {
do_crm_log(log_level, " --- ");
}
}
is_first = TRUE;
for (child = __xml_first_child(added); child != NULL; child = __xml_next(child)) {
log_data_element(log_level, __FILE__, function, __LINE__, "+ ", child, 0,
options | xml_log_option_diff_plus);
if (is_first) {
is_first = FALSE;
} else {
do_crm_log(log_level, " +++ ");
}
}
}
void
purge_diff_markers(xmlNode * a_node)
{
xmlNode *child = NULL;
CRM_CHECK(a_node != NULL, return);
xml_remove_prop(a_node, XML_DIFF_MARKER);
for (child = __xml_first_child(a_node); child != NULL; child = __xml_next(child)) {
purge_diff_markers(child);
}
}
static void
save_xml_to_file(xmlNode * xml, const char *desc, const char *filename)
{
char *f = NULL;
if (filename == NULL) {
char *uuid = crm_generate_uuid();
f = g_strdup_printf("/tmp/%s", uuid);
filename = f;
free(uuid);
}
crm_info("Saving %s to %s", desc, filename);
write_xml_file(xml, filename, FALSE);
g_free(f);
}
gboolean
apply_xml_diff(xmlNode * old, xmlNode * diff, xmlNode ** new)
{
gboolean result = TRUE;
int root_nodes_seen = 0;
static struct qb_log_callsite *digest_cs = NULL;
const char *digest = crm_element_value(diff, XML_ATTR_DIGEST);
const char *version = crm_element_value(diff, XML_ATTR_CRM_VERSION);
xmlNode *child_diff = NULL;
xmlNode *added = find_xml_node(diff, "diff-added", FALSE);
xmlNode *removed = find_xml_node(diff, "diff-removed", FALSE);
CRM_CHECK(new != NULL, return FALSE);
if (digest_cs == NULL) {
digest_cs =
qb_log_callsite_get(__func__, __FILE__, "diff-digest", LOG_TRACE, __LINE__,
crm_trace_nonlog);
}
crm_trace("Substraction Phase");
for (child_diff = __xml_first_child(removed); child_diff != NULL;
child_diff = __xml_next(child_diff)) {
CRM_CHECK(root_nodes_seen == 0, result = FALSE);
if (root_nodes_seen == 0) {
*new = subtract_xml_object(NULL, old, child_diff, FALSE, NULL, NULL);
}
root_nodes_seen++;
}
if (root_nodes_seen == 0) {
*new = copy_xml(old);
} else if (root_nodes_seen > 1) {
crm_err("(-) Diffs cannot contain more than one change set..." " saw %d", root_nodes_seen);
result = FALSE;
}
root_nodes_seen = 0;
crm_trace("Addition Phase");
if (result) {
xmlNode *child_diff = NULL;
for (child_diff = __xml_first_child(added); child_diff != NULL;
child_diff = __xml_next(child_diff)) {
CRM_CHECK(root_nodes_seen == 0, result = FALSE);
if (root_nodes_seen == 0) {
add_xml_object(NULL, *new, child_diff, TRUE);
}
root_nodes_seen++;
}
}
if (root_nodes_seen > 1) {
crm_err("(+) Diffs cannot contain more than one change set..." " saw %d", root_nodes_seen);
result = FALSE;
} else if (result && digest) {
char *new_digest = NULL;
purge_diff_markers(*new); /* Purge now so the diff is ok */
new_digest = calculate_xml_versioned_digest(*new, FALSE, TRUE, version);
if (safe_str_neq(new_digest, digest)) {
crm_info("Digest mis-match: expected %s, calculated %s", digest, new_digest);
result = FALSE;
crm_trace("%p %0.6x", digest_cs, digest_cs ? digest_cs->targets : 0);
if (digest_cs && digest_cs->targets) {
save_xml_to_file(old, "diff:original", NULL);
save_xml_to_file(diff, "diff:input", NULL);
save_xml_to_file(*new, "diff:new", NULL);
}
} else {
crm_trace("Digest matched: expected %s, calculated %s", digest, new_digest);
}
free(new_digest);
} else if (result) {
purge_diff_markers(*new); /* Purge now so the diff is ok */
}
return result;
}
static void
__xml_diff_object(xmlNode * old, xmlNode * new)
{
xmlNode *cIter = NULL;
xmlAttr *pIter = NULL;
if(old == NULL) {
crm_node_created(new);
return;
} else if(new == NULL) {
int offset = 0;
char buffer[XML_BUFFER_SIZE];
xml_private_t *p = new->doc->_private;
if(__get_prefix(NULL, old, buffer, offset) > 0) {
p->deleted_paths = g_list_append(p->deleted_paths, strdup(buffer));
p->flags |= xpf_dirty;
}
return;
} else {
xml_private_t *p = new->_private;
if(p->flags & xpf_processed) {
/* Avoid re-comparing nodes */
return;
}
p->flags |= xpf_processed;
}
for (pIter = crm_first_attr(new); pIter != NULL; pIter = pIter->next) {
xml_private_t *p = pIter->_private;
p->flags |= xpf_created;
}
for (pIter = crm_first_attr(old); pIter != NULL; pIter = pIter->next) {
const char *name = (const char *)pIter->name;
const char *value = crm_element_value(old, name);
xmlAttr *exists = xmlHasProp(new, pIter->name);
crm_xml_add(new, name, value);
if(exists == NULL) {
xml_remove_prop(new, name);
} else {
xml_private_t *p = exists->_private;
clear_bit(p->flags, xpf_created);
}
}
for (pIter = crm_first_attr(new); pIter != NULL; pIter = pIter->next) {
xml_private_t *p = pIter->_private;
if(is_set(p->flags, xpf_dirty)) {
break;
} else if(is_set(p->flags, xpf_created)) {
crm_node_dirty(new);
break;
}
}
for (cIter = __xml_first_child(new); cIter != NULL; cIter = __xml_next(cIter)) {
xmlNode *old_child = find_entity(old, crm_element_name(cIter), ID(cIter));
__xml_diff_object(old_child, cIter);
}
for (cIter = __xml_first_child(old); cIter != NULL; cIter = __xml_next(cIter)) {
xmlNode *new_child = find_entity(new, crm_element_name(cIter), ID(cIter));
__xml_diff_object(cIter, new_child);
}
}
void
xml_calculate_changes(xmlNode * old, xmlNode * new)
{
CRM_CHECK(safe_str_eq(crm_element_name(old), crm_element_name(new)), return);
CRM_CHECK(safe_str_eq(ID(old), ID(new)), return);
xml_track_changes(new);
__xml_diff_object(old, new);
}
xmlNode *
diff_xml_object(xmlNode * old, xmlNode * new, gboolean suppress)
{
xmlNode *tmp1 = NULL;
xmlNode *diff = create_xml_node(NULL, "diff");
xmlNode *removed = create_xml_node(diff, "diff-removed");
xmlNode *added = create_xml_node(diff, "diff-added");
crm_xml_add(diff, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET);
tmp1 = subtract_xml_object(removed, old, new, FALSE, NULL, "removed:top");
if (suppress && tmp1 != NULL && can_prune_leaf(tmp1)) {
free_xml(tmp1);
}
tmp1 = subtract_xml_object(added, new, old, TRUE, NULL, "added:top");
if (suppress && tmp1 != NULL && can_prune_leaf(tmp1)) {
free_xml(tmp1);
}
if (added->children == NULL && removed->children == NULL) {
free_xml(diff);
diff = NULL;
}
return diff;
}
gboolean
can_prune_leaf(xmlNode * xml_node)
{
xmlNode *child = NULL;
xmlAttrPtr pIter = NULL;
gboolean can_prune = TRUE;
for (pIter = crm_first_attr(xml_node); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
if (strcmp(p_name, XML_ATTR_ID) == 0) {
continue;
}
can_prune = FALSE;
}
for (child = __xml_first_child(xml_node); child != NULL; child = __xml_next(child)) {
if (can_prune_leaf(child)) {
free_xml(child);
} else {
can_prune = FALSE;
}
}
return can_prune;
}
void
diff_filter_context(int context, int upper_bound, int lower_bound,
xmlNode * xml_node, xmlNode * parent)
{
xmlNode *us = NULL;
xmlNode *child = NULL;
xmlAttrPtr pIter = NULL;
xmlNode *new_parent = parent;
const char *name = crm_element_name(xml_node);
CRM_CHECK(xml_node != NULL && name != NULL, return);
us = create_xml_node(parent, name);
for (pIter = crm_first_attr(xml_node); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
lower_bound = context;
crm_xml_add(us, p_name, p_value);
}
if (lower_bound >= 0 || upper_bound >= 0) {
crm_xml_add(us, XML_ATTR_ID, ID(xml_node));
new_parent = us;
} else {
upper_bound = in_upper_context(0, context, xml_node);
if (upper_bound >= 0) {
crm_xml_add(us, XML_ATTR_ID, ID(xml_node));
new_parent = us;
} else {
free_xml(us);
us = NULL;
}
}
for (child = __xml_first_child(us); child != NULL; child = __xml_next(child)) {
diff_filter_context(context, upper_bound - 1, lower_bound - 1, child, new_parent);
}
}
int
in_upper_context(int depth, int context, xmlNode * xml_node)
{
if (context == 0) {
return 0;
}
if (xml_node->properties) {
return depth;
} else if (depth < context) {
xmlNode *child = NULL;
for (child = __xml_first_child(xml_node); child != NULL; child = __xml_next(child)) {
if (in_upper_context(depth + 1, context, child)) {
return depth;
}
}
}
return 0;
}
static xmlNode *
find_xml_comment(xmlNode * root, xmlNode * search_comment)
{
xmlNode *a_child = NULL;
CRM_CHECK(search_comment->type == XML_COMMENT_NODE, return NULL);
for (a_child = __xml_first_child(root); a_child != NULL; a_child = __xml_next(a_child)) {
if (a_child->type != XML_COMMENT_NODE) {
continue;
}
if (safe_str_eq((const char *)a_child->content, (const char *)search_comment->content)) {
return a_child;
}
}
return NULL;
}
static xmlNode *
subtract_xml_comment(xmlNode * parent, xmlNode * left, xmlNode * right,
gboolean * changed)
{
CRM_CHECK(left != NULL, return NULL);
CRM_CHECK(left->type == XML_COMMENT_NODE, return NULL);
if (right == NULL
|| safe_str_neq((const char *)left->content, (const char *)right->content)) {
xmlNode *deleted = NULL;
deleted = add_node_copy(parent, left);
*changed = TRUE;
return deleted;
}
return NULL;
}
xmlNode *
subtract_xml_object(xmlNode * parent, xmlNode * left, xmlNode * right,
gboolean full, gboolean * changed, const char *marker)
{
gboolean dummy = FALSE;
gboolean skip = FALSE;
xmlNode *diff = NULL;
xmlNode *right_child = NULL;
xmlNode *left_child = NULL;
xmlAttrPtr xIter = NULL;
const char *id = NULL;
const char *name = NULL;
const char *value = NULL;
const char *right_val = NULL;
int lpc = 0;
static int filter_len = DIMOF(filter);
if (changed == NULL) {
changed = &dummy;
}
if (left == NULL) {
return NULL;
}
if (left->type == XML_COMMENT_NODE) {
return subtract_xml_comment(parent, left, right, changed);
}
id = ID(left);
if (right == NULL) {
xmlNode *deleted = NULL;
crm_trace("Processing <%s id=%s> (complete copy)", crm_element_name(left), id);
deleted = add_node_copy(parent, left);
crm_xml_add(deleted, XML_DIFF_MARKER, marker);
*changed = TRUE;
return deleted;
}
name = crm_element_name(left);
CRM_CHECK(name != NULL, return NULL);
/* check for XML_DIFF_MARKER in a child */
value = crm_element_value(right, XML_DIFF_MARKER);
if (value != NULL && strcmp(value, "removed:top") == 0) {
crm_trace("We are the root of the deletion: %s.id=%s", name, id);
*changed = TRUE;
return NULL;
}
/* Avoiding creating the full heirarchy would save even more work here */
diff = create_xml_node(parent, name);
/* Reset filter */
for (lpc = 0; lpc < filter_len; lpc++) {
filter[lpc].found = FALSE;
}
/* changes to child objects */
for (left_child = __xml_first_child(left); left_child != NULL;
left_child = __xml_next(left_child)) {
gboolean child_changed = FALSE;
if (left_child->type == XML_COMMENT_NODE) {
right_child = find_xml_comment(right, left_child);
} else {
right_child = find_entity(right, crm_element_name(left_child), ID(left_child));
}
subtract_xml_object(diff, left_child, right_child, full, &child_changed, marker);
if (child_changed) {
*changed = TRUE;
}
}
if (*changed == FALSE) {
/* Nothing to do */
} else if (full) {
xmlAttrPtr pIter = NULL;
for (pIter = crm_first_attr(left); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
xmlSetProp(diff, (const xmlChar *)p_name, (const xmlChar *)p_value);
}
/* We already have everything we need... */
goto done;
} else if (id) {
xmlSetProp(diff, (const xmlChar *)XML_ATTR_ID, (const xmlChar *)id);
}
/* changes to name/value pairs */
for (xIter = crm_first_attr(left); xIter != NULL; xIter = xIter->next) {
const char *prop_name = (const char *)xIter->name;
if (strcmp(prop_name, XML_ATTR_ID) == 0) {
continue;
}
skip = FALSE;
for (lpc = 0; skip == FALSE && lpc < filter_len; lpc++) {
if (filter[lpc].found == FALSE && strcmp(prop_name, filter[lpc].string) == 0) {
filter[lpc].found = TRUE;
skip = TRUE;
break;
}
}
if (skip) {
continue;
}
right_val = crm_element_value(right, prop_name);
if (right_val == NULL) {
/* new */
*changed = TRUE;
if (full) {
xmlAttrPtr pIter = NULL;
for (pIter = crm_first_attr(left); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
xmlSetProp(diff, (const xmlChar *)p_name, (const xmlChar *)p_value);
}
break;
} else {
const char *left_value = crm_element_value(left, prop_name);
xmlSetProp(diff, (const xmlChar *)prop_name, (const xmlChar *)value);
crm_xml_add(diff, prop_name, left_value);
}
} else {
/* Only now do we need the left value */
const char *left_value = crm_element_value(left, prop_name);
if (strcmp(left_value, right_val) == 0) {
/* unchanged */
} else {
*changed = TRUE;
if (full) {
xmlAttrPtr pIter = NULL;
crm_trace("Changes detected to %s in <%s id=%s>", prop_name,
crm_element_name(left), id);
for (pIter = crm_first_attr(left); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
xmlSetProp(diff, (const xmlChar *)p_name, (const xmlChar *)p_value);
}
break;
} else {
crm_trace("Changes detected to %s (%s -> %s) in <%s id=%s>",
prop_name, left_value, right_val, crm_element_name(left), id);
crm_xml_add(diff, prop_name, left_value);
}
}
}
}
if (*changed == FALSE) {
free_xml(diff);
return NULL;
} else if (full == FALSE && id) {
crm_xml_add(diff, XML_ATTR_ID, id);
}
done:
return diff;
}
static int
add_xml_comment(xmlNode * parent, xmlNode * target, xmlNode * update)
{
CRM_CHECK(update != NULL, return 0);
CRM_CHECK(update->type == XML_COMMENT_NODE, return 0);
if (target == NULL) {
target = find_xml_comment(parent, update);
}
if (target == NULL) {
add_node_copy(parent, update);
/* We wont reach here currently */
} else if (safe_str_neq((const char *)target->content, (const char *)update->content)) {
xmlFree(target->content);
target->content = xmlStrdup(update->content);
}
return 0;
}
int
add_xml_object(xmlNode * parent, xmlNode * target, xmlNode * update, gboolean as_diff)
{
xmlNode *a_child = NULL;
const char *object_id = NULL;
const char *object_name = NULL;
#if XML_PARSE_DEBUG
crm_log_xml_trace("update:", update);
crm_log_xml_trace("target:", target);
#endif
CRM_CHECK(update != NULL, return 0);
if (update->type == XML_COMMENT_NODE) {
return add_xml_comment(parent, target, update);
}
object_name = crm_element_name(update);
object_id = ID(update);
CRM_CHECK(object_name != NULL, return 0);
if (target == NULL && object_id == NULL) {
/* placeholder object */
target = find_xml_node(parent, object_name, FALSE);
} else if (target == NULL) {
target = find_entity(parent, object_name, object_id);
}
if (target == NULL) {
target = create_xml_node(parent, object_name);
CRM_CHECK(target != NULL, return 0);
#if XML_PARSER_DEBUG
crm_trace("Added <%s%s%s/>", crm_str(object_name),
object_id ? " id=" : "", object_id ? object_id : "");
} else {
crm_trace("Found node <%s%s%s/> to update",
crm_str(object_name), object_id ? " id=" : "", object_id ? object_id : "");
#endif
}
if (as_diff == FALSE) {
/* So that expand_plus_plus() gets called */
copy_in_properties(target, update);
} else {
/* No need for expand_plus_plus(), just raw speed */
xmlAttrPtr pIter = NULL;
for (pIter = crm_first_attr(update); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
/* Remove it first so the ordering of the update is preserved */
xmlUnsetProp(target, (const xmlChar *)p_name);
xmlSetProp(target, (const xmlChar *)p_name, (const xmlChar *)p_value);
}
}
for (a_child = __xml_first_child(update); a_child != NULL; a_child = __xml_next(a_child)) {
#if XML_PARSER_DEBUG
crm_trace("Updating child <%s id=%s>", crm_element_name(a_child), ID(a_child));
#endif
add_xml_object(target, NULL, a_child, as_diff);
}
#if XML_PARSER_DEBUG
crm_trace("Finished with <%s id=%s>", crm_str(object_name), crm_str(object_id));
#endif
return 0;
}
gboolean
update_xml_child(xmlNode * child, xmlNode * to_update)
{
gboolean can_update = TRUE;
xmlNode *child_of_child = NULL;
CRM_CHECK(child != NULL, return FALSE);
CRM_CHECK(to_update != NULL, return FALSE);
if (safe_str_neq(crm_element_name(to_update), crm_element_name(child))) {
can_update = FALSE;
} else if (safe_str_neq(ID(to_update), ID(child))) {
can_update = FALSE;
} else if (can_update) {
#if XML_PARSER_DEBUG
crm_log_xml_trace(child, "Update match found...");
#endif
add_xml_object(NULL, child, to_update, FALSE);
}
for (child_of_child = __xml_first_child(child); child_of_child != NULL;
child_of_child = __xml_next(child_of_child)) {
/* only update the first one */
if (can_update) {
break;
}
can_update = update_xml_child(child_of_child, to_update);
}
return can_update;
}
int
find_xml_children(xmlNode ** children, xmlNode * root,
const char *tag, const char *field, const char *value, gboolean search_matches)
{
int match_found = 0;
CRM_CHECK(root != NULL, return FALSE);
CRM_CHECK(children != NULL, return FALSE);
if (tag != NULL && safe_str_neq(tag, crm_element_name(root))) {
} else if (value != NULL && safe_str_neq(value, crm_element_value(root, field))) {
} else {
if (*children == NULL) {
*children = create_xml_node(NULL, __FUNCTION__);
}
add_node_copy(*children, root);
match_found = 1;
}
if (search_matches || match_found == 0) {
xmlNode *child = NULL;
for (child = __xml_first_child(root); child != NULL; child = __xml_next(child)) {
match_found += find_xml_children(children, child, tag, field, value, search_matches);
}
}
return match_found;
}
gboolean
replace_xml_child(xmlNode * parent, xmlNode * child, xmlNode * update, gboolean delete_only)
{
gboolean can_delete = FALSE;
xmlNode *child_of_child = NULL;
const char *up_id = NULL;
const char *child_id = NULL;
const char *right_val = NULL;
CRM_CHECK(child != NULL, return FALSE);
CRM_CHECK(update != NULL, return FALSE);
up_id = ID(update);
child_id = ID(child);
if (up_id == NULL || (child_id && strcmp(child_id, up_id) == 0)) {
can_delete = TRUE;
}
if (safe_str_neq(crm_element_name(update), crm_element_name(child))) {
can_delete = FALSE;
}
if (can_delete && delete_only) {
xmlAttrPtr pIter = NULL;
for (pIter = crm_first_attr(update); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
right_val = crm_element_value(child, p_name);
if (safe_str_neq(p_value, right_val)) {
can_delete = FALSE;
}
}
}
if (can_delete && parent != NULL) {
crm_log_xml_trace(child, "Delete match found...");
if (delete_only || update == NULL) {
free_xml(child);
} else {
xmlNode *tmp = copy_xml(update);
xmlDoc *doc = tmp->doc;
xmlNode *old = xmlReplaceNode(child, tmp);
free_xml(old);
xmlDocSetRootElement(doc, NULL);
xmlFreeDoc(doc);
}
child = NULL;
return TRUE;
} else if (can_delete) {
crm_log_xml_debug(child, "Cannot delete the search root");
can_delete = FALSE;
}
child_of_child = __xml_first_child(child);
while (child_of_child) {
xmlNode *next = __xml_next(child_of_child);
can_delete = replace_xml_child(child, child_of_child, update, delete_only);
/* only delete the first one */
if (can_delete) {
child_of_child = NULL;
} else {
child_of_child = next;
}
}
return can_delete;
}
void
hash2nvpair(gpointer key, gpointer value, gpointer user_data)
{
const char *name = key;
const char *s_value = value;
xmlNode *xml_node = user_data;
xmlNode *xml_child = create_xml_node(xml_node, XML_CIB_TAG_NVPAIR);
crm_xml_add(xml_child, XML_ATTR_ID, name);
crm_xml_add(xml_child, XML_NVPAIR_ATTR_NAME, name);
crm_xml_add(xml_child, XML_NVPAIR_ATTR_VALUE, s_value);
crm_trace("dumped: name=%s value=%s", name, s_value);
}
void
hash2smartfield(gpointer key, gpointer value, gpointer user_data)
{
const char *name = key;
const char *s_value = value;
xmlNode *xml_node = user_data;
if (isdigit(name[0])) {
xmlNode *tmp = create_xml_node(xml_node, XML_TAG_PARAM);
crm_xml_add(tmp, XML_NVPAIR_ATTR_NAME, name);
crm_xml_add(tmp, XML_NVPAIR_ATTR_VALUE, s_value);
} else if (crm_element_value(xml_node, name) == NULL) {
crm_xml_add(xml_node, name, s_value);
crm_trace("dumped: %s=%s", name, s_value);
} else {
crm_trace("duplicate: %s=%s", name, s_value);
}
}
void
hash2field(gpointer key, gpointer value, gpointer user_data)
{
const char *name = key;
const char *s_value = value;
xmlNode *xml_node = user_data;
if (crm_element_value(xml_node, name) == NULL) {
crm_xml_add(xml_node, name, s_value);
} else {
crm_trace("duplicate: %s=%s", name, s_value);
}
}
void
hash2metafield(gpointer key, gpointer value, gpointer user_data)
{
char *crm_name = NULL;
if (key == NULL || value == NULL) {
return;
} else if (((char *)key)[0] == '#') {
return;
} else if (strstr(key, ":")) {
return;
}
crm_name = crm_meta_name(key);
hash2field(crm_name, value, user_data);
free(crm_name);
}
GHashTable *
xml2list(xmlNode * parent)
{
xmlNode *child = NULL;
xmlAttrPtr pIter = NULL;
xmlNode *nvpair_list = NULL;
GHashTable *nvpair_hash = g_hash_table_new_full(crm_str_hash, g_str_equal,
g_hash_destroy_str, g_hash_destroy_str);
CRM_CHECK(parent != NULL, return nvpair_hash);
nvpair_list = find_xml_node(parent, XML_TAG_ATTRS, FALSE);
if (nvpair_list == NULL) {
crm_trace("No attributes in %s", crm_element_name(parent));
crm_log_xml_trace(parent, "No attributes for resource op");
}
crm_log_xml_trace(nvpair_list, "Unpacking");
for (pIter = crm_first_attr(nvpair_list); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
crm_trace("Added %s=%s", p_name, p_value);
g_hash_table_insert(nvpair_hash, strdup(p_name), strdup(p_value));
}
for (child = __xml_first_child(nvpair_list); child != NULL; child = __xml_next(child)) {
if (strcmp((const char *)child->name, XML_TAG_PARAM) == 0) {
const char *key = crm_element_value(child, XML_NVPAIR_ATTR_NAME);
const char *value = crm_element_value(child, XML_NVPAIR_ATTR_VALUE);
crm_trace("Added %s=%s", key, value);
if (key != NULL && value != NULL) {
g_hash_table_insert(nvpair_hash, strdup(key), strdup(value));
}
}
}
return nvpair_hash;
}
typedef struct name_value_s {
const char *name;
const void *value;
} name_value_t;
static gint
sort_pairs(gconstpointer a, gconstpointer b)
{
int rc = 0;
const name_value_t *pair_a = a;
const name_value_t *pair_b = b;
CRM_ASSERT(a != NULL);
CRM_ASSERT(pair_a->name != NULL);
CRM_ASSERT(b != NULL);
CRM_ASSERT(pair_b->name != NULL);
rc = strcmp(pair_a->name, pair_b->name);
if (rc < 0) {
return -1;
} else if (rc > 0) {
return 1;
}
return 0;
}
static void
dump_pair(gpointer data, gpointer user_data)
{
name_value_t *pair = data;
xmlNode *parent = user_data;
crm_xml_add(parent, pair->name, pair->value);
}
xmlNode *
sorted_xml(xmlNode * input, xmlNode * parent, gboolean recursive)
{
xmlNode *child = NULL;
GListPtr sorted = NULL;
GListPtr unsorted = NULL;
name_value_t *pair = NULL;
xmlNode *result = NULL;
const char *name = NULL;
xmlAttrPtr pIter = NULL;
CRM_CHECK(input != NULL, return NULL);
name = crm_element_name(input);
CRM_CHECK(name != NULL, return NULL);
result = create_xml_node(parent, name);
for (pIter = crm_first_attr(input); pIter != NULL; pIter = pIter->next) {
const char *p_name = (const char *)pIter->name;
const char *p_value = crm_attr_value(pIter);
pair = calloc(1, sizeof(name_value_t));
pair->name = p_name;
pair->value = p_value;
unsorted = g_list_prepend(unsorted, pair);
pair = NULL;
}
sorted = g_list_sort(unsorted, sort_pairs);
g_list_foreach(sorted, dump_pair, result);
g_list_free_full(sorted, free);
for (child = __xml_first_child(input); child != NULL; child = __xml_next(child)) {
if (recursive) {
sorted_xml(child, result, recursive);
} else {
add_node_copy(result, child);
}
}
return result;
}
/* "c048eae664dba840e1d2060f00299e9d" */
static char *
calculate_xml_digest_v1(xmlNode * input, gboolean sort, gboolean ignored)
{
char *digest = NULL;
char *buffer = NULL;
xmlNode *copy = NULL;
if (sort) {
crm_trace("Sorting xml...");
copy = sorted_xml(input, NULL, TRUE);
crm_trace("Done");
input = copy;
}
buffer = dump_xml_for_digest(input);
CRM_CHECK(buffer != NULL && strlen(buffer) > 0, free_xml(copy);
free(buffer);
return NULL);
digest = crm_md5sum(buffer);
crm_log_xml_trace(input, "digest:source");
free(buffer);
free_xml(copy);
return digest;
}
static char *
calculate_xml_digest_v2(xmlNode * source, gboolean do_filter)
{
char *digest = NULL;
char *buffer = NULL;
int offset, max;
static struct qb_log_callsite *digest_cs = NULL;
crm_trace("Begin digest %s", do_filter?"filtered":"");
if (do_filter && BEST_EFFORT_STATUS) {
/* Exclude the status calculation from the digest
*
* This doesn't mean it wont be sync'd, we just wont be paranoid
* about it being an _exact_ copy
*
* We don't need it to be exact, since we throw it away and regenerate
* from our peers whenever a new DC is elected anyway
*
* Importantly, this reduces the amount of XML to copy+export as
* well as the amount of data for MD5 needs to operate on
*/
} else {
dump_xml(source, do_filter ? xml_log_option_filtered : 0, &buffer, &offset, &max, 0);
}
CRM_ASSERT(buffer != NULL);
digest = crm_md5sum(buffer);
if (digest_cs == NULL) {
digest_cs = qb_log_callsite_get(__func__, __FILE__, "cib-digest", LOG_TRACE, __LINE__,
crm_trace_nonlog);
}
if (digest_cs && digest_cs->targets) {
char *trace_file = crm_concat("/tmp/cib-digest", digest, '-');
crm_trace("Saving %s.%s.%s to %s",
crm_element_value(source, XML_ATTR_GENERATION_ADMIN),
crm_element_value(source, XML_ATTR_GENERATION),
crm_element_value(source, XML_ATTR_NUMUPDATES), trace_file);
save_xml_to_file(source, "digest input", trace_file);
free(trace_file);
}
free(buffer);
crm_trace("End digest");
return digest;
}
char *
calculate_on_disk_digest(xmlNode * input)
{
/* Always use the v1 format for on-disk digests
* a) its a compatability nightmare
* b) we only use this once at startup, all other
* invocations are in a separate child process
*/
return calculate_xml_digest_v1(input, FALSE, FALSE);
}
char *
calculate_operation_digest(xmlNode * input, const char *version)
{
/* We still need the sorting for parameter digests */
return calculate_xml_digest_v1(input, TRUE, FALSE);
}
char *
calculate_xml_versioned_digest(xmlNode * input, gboolean sort, gboolean do_filter,
const char *version)
{
/*
* The sorting associated with v1 digest creation accounted for 23% of
* the CIB's CPU usage on the server. v2 drops this.
*
* The filtering accounts for an additional 2.5% and we may want to
* remove it in future.
*
* v2 also uses the xmlBuffer contents directly to avoid additional copying
*/
if (version == NULL || compare_version("3.0.5", version) > 0) {
crm_trace("Using v1 digest algorithm for %s", crm_str(version));
return calculate_xml_digest_v1(input, sort, do_filter);
}
crm_trace("Using v2 digest algorithm for %s", crm_str(version));
return calculate_xml_digest_v2(input, do_filter);
}
static gboolean
validate_with_dtd(xmlDocPtr doc, gboolean to_logs, const char *dtd_file)
{
gboolean valid = TRUE;
xmlDtdPtr dtd = NULL;
xmlValidCtxtPtr cvp = NULL;
CRM_CHECK(doc != NULL, return FALSE);
CRM_CHECK(dtd_file != NULL, return FALSE);
dtd = xmlParseDTD(NULL, (const xmlChar *)dtd_file);
if(dtd == NULL) {
crm_err("Could not locate/parse DTD: %s", dtd_file);
return TRUE;
}
cvp = xmlNewValidCtxt();
if(cvp) {
if (to_logs) {
cvp->userData = (void *)LOG_ERR;
cvp->error = (xmlValidityErrorFunc) xml_log;
cvp->warning = (xmlValidityWarningFunc) xml_log;
} else {
cvp->userData = (void *)stderr;
cvp->error = (xmlValidityErrorFunc) fprintf;
cvp->warning = (xmlValidityWarningFunc) fprintf;
}
if (!xmlValidateDtd(cvp, doc, dtd)) {
valid = FALSE;
}
xmlFreeValidCtxt(cvp);
} else {
crm_err("Internal error: No valid context");
}
xmlFreeDtd(dtd);
return valid;
}
xmlNode *
first_named_child(xmlNode * parent, const char *name)
{
xmlNode *match = NULL;
for (match = __xml_first_child(parent); match != NULL; match = __xml_next(match)) {
/*
* name == NULL gives first child regardless of name; this is
* semantically incorrect in this funciton, but may be necessary
* due to prior use of xml_child_iter_filter
*/
if (name == NULL || strcmp((const char *)match->name, name) == 0) {
return match;
}
}
return NULL;
}
#if 0
static void
relaxng_invalid_stderr(void *userData, xmlErrorPtr error)
{
/*
Structure xmlError
struct _xmlError {
int domain : What part of the library raised this er
int code : The error code, e.g. an xmlParserError
char * message : human-readable informative error messag
xmlErrorLevel level : how consequent is the error
char * file : the filename
int line : the line number if available
char * str1 : extra string information
char * str2 : extra string information
char * str3 : extra string information
int int1 : extra number information
int int2 : column number of the error or 0 if N/A
void * ctxt : the parser context if available
void * node : the node in the tree
}
*/
crm_err("Structured error: line=%d, level=%d %s", error->line, error->level, error->message);
}
#endif
static gboolean
validate_with_relaxng(xmlDocPtr doc, gboolean to_logs, const char *relaxng_file,
relaxng_ctx_cache_t ** cached_ctx)
{
int rc = 0;
gboolean valid = TRUE;
relaxng_ctx_cache_t *ctx = NULL;
CRM_CHECK(doc != NULL, return FALSE);
CRM_CHECK(relaxng_file != NULL, return FALSE);
if (cached_ctx && *cached_ctx) {
ctx = *cached_ctx;
} else {
crm_info("Creating RNG parser context");
ctx = calloc(1, sizeof(relaxng_ctx_cache_t));
xmlLoadExtDtdDefaultValue = 1;
ctx->parser = xmlRelaxNGNewParserCtxt(relaxng_file);
CRM_CHECK(ctx->parser != NULL, goto cleanup);
if (to_logs) {
xmlRelaxNGSetParserErrors(ctx->parser,
(xmlRelaxNGValidityErrorFunc) xml_log,
(xmlRelaxNGValidityWarningFunc) xml_log,
GUINT_TO_POINTER(LOG_ERR));
} else {
xmlRelaxNGSetParserErrors(ctx->parser,
(xmlRelaxNGValidityErrorFunc) fprintf,
(xmlRelaxNGValidityWarningFunc) fprintf, stderr);
}
ctx->rng = xmlRelaxNGParse(ctx->parser);
CRM_CHECK(ctx->rng != NULL, crm_err("Could not find/parse %s", relaxng_file);
goto cleanup);
ctx->valid = xmlRelaxNGNewValidCtxt(ctx->rng);
CRM_CHECK(ctx->valid != NULL, goto cleanup);
if (to_logs) {
xmlRelaxNGSetValidErrors(ctx->valid,
(xmlRelaxNGValidityErrorFunc) xml_log,
(xmlRelaxNGValidityWarningFunc) xml_log,
GUINT_TO_POINTER(LOG_ERR));
} else {
xmlRelaxNGSetValidErrors(ctx->valid,
(xmlRelaxNGValidityErrorFunc) fprintf,
(xmlRelaxNGValidityWarningFunc) fprintf, stderr);
}
}
/* xmlRelaxNGSetValidStructuredErrors( */
/* valid, relaxng_invalid_stderr, valid); */
xmlLineNumbersDefault(1);
rc = xmlRelaxNGValidateDoc(ctx->valid, doc);
if (rc > 0) {
valid = FALSE;
} else if (rc < 0) {
crm_err("Internal libxml error during validation\n");
}
cleanup:
if (cached_ctx) {
*cached_ctx = ctx;
} else {
if (ctx->parser != NULL) {
xmlRelaxNGFreeParserCtxt(ctx->parser);
}
if (ctx->valid != NULL) {
xmlRelaxNGFreeValidCtxt(ctx->valid);
}
if (ctx->rng != NULL) {
xmlRelaxNGFree(ctx->rng);
}
free(ctx);
}
return valid;
}
void
crm_xml_init(void)
{
static bool init = TRUE;
if(init) {
init = FALSE;
/* The default allocator XML_BUFFER_ALLOC_EXACT does far too many
* realloc()s and it can take upwards of 18 seconds (yes, seconds)
* to dump a 28kb tree which XML_BUFFER_ALLOC_DOUBLEIT can do in
* less than 1 second.
*/
xmlSetBufferAllocationScheme(XML_BUFFER_ALLOC_DOUBLEIT);
/* Populate and free the _private field when nodes are created and destroyed */
xmlDeregisterNodeDefault(pcmkDeregisterNode);
xmlRegisterNodeDefault(pcmkRegisterNode);
}
}
void
crm_xml_cleanup(void)
{
int lpc = 0;
relaxng_ctx_cache_t *ctx = NULL;
crm_info("Cleaning up memory from libxml2");
for (; lpc < all_schemas; lpc++) {
switch (known_schemas[lpc].type) {
case 0:
/* None */
break;
case 1:
/* DTD - Not cached */
break;
case 2:
/* RNG - Cached */
ctx = (relaxng_ctx_cache_t *) known_schemas[lpc].cache;
if (ctx == NULL) {
break;
}
if (ctx->parser != NULL) {
xmlRelaxNGFreeParserCtxt(ctx->parser);
}
if (ctx->valid != NULL) {
xmlRelaxNGFreeValidCtxt(ctx->valid);
}
if (ctx->rng != NULL) {
xmlRelaxNGFree(ctx->rng);
}
free(ctx);
known_schemas[lpc].cache = NULL;
break;
default:
break;
}
}
xsltCleanupGlobals();
xmlCleanupParser();
}
static gboolean
validate_with(xmlNode * xml, int method, gboolean to_logs)
{
xmlDocPtr doc = NULL;
gboolean valid = FALSE;
int type = known_schemas[method].type;
char *file = NULL;
CRM_CHECK(xml != NULL, return FALSE);
doc = getDocPtr(xml);
file = get_schema_path(known_schemas[method].location);
crm_trace("Validating with: %s (type=%d)", crm_str(file), type);
switch (type) {
case 0:
valid = TRUE;
break;
case 1:
valid = validate_with_dtd(doc, to_logs, file);
break;
case 2:
valid =
validate_with_relaxng(doc, to_logs, file,
(relaxng_ctx_cache_t **) & (known_schemas[method].cache));
break;
default:
crm_err("Unknown validator type: %d", type);
break;
}
free(file);
return valid;
}
#include <stdio.h>
static void
dump_file(const char *filename)
{
FILE *fp = NULL;
int ch, line = 0;
CRM_CHECK(filename != NULL, return);
fp = fopen(filename, "r");
CRM_CHECK(fp != NULL, return);
fprintf(stderr, "%4d ", ++line);
do {
ch = getc(fp);
if (ch == EOF) {
putc('\n', stderr);
break;
} else if (ch == '\n') {
fprintf(stderr, "\n%4d ", ++line);
} else {
putc(ch, stderr);
}
} while (1);
fclose(fp);
}
gboolean
validate_xml_verbose(xmlNode * xml_blob)
{
int fd = 0;
xmlDoc *doc = NULL;
xmlNode *xml = NULL;
gboolean rc = FALSE;
char *filename = strdup(CRM_STATE_DIR "/cib-invalid.XXXXXX");
umask(S_IWGRP | S_IWOTH | S_IROTH);
fd = mkstemp(filename);
write_xml_fd(xml_blob, filename, fd, FALSE);
dump_file(filename);
doc = xmlParseFile(filename);
xml = xmlDocGetRootElement(doc);
rc = validate_xml(xml, NULL, FALSE);
free_xml(xml);
unlink(filename);
return rc;
}
gboolean
validate_xml(xmlNode * xml_blob, const char *validation, gboolean to_logs)
{
int lpc = 0;
if (validation == NULL) {
validation = crm_element_value(xml_blob, XML_ATTR_VALIDATION);
}
if (validation == NULL) {
validation = crm_element_value(xml_blob, "ignore-dtd");
if (crm_is_true(validation)) {
validation = "none";
} else {
validation = "pacemaker-1.0";
}
}
if (strcmp(validation, "none") == 0) {
return TRUE;
}
for (; lpc < all_schemas; lpc++) {
if (known_schemas[lpc].name && strcmp(validation, known_schemas[lpc].name) == 0) {
return validate_with(xml_blob, lpc, to_logs);
}
}
crm_err("Unknown validator: %s", validation);
return FALSE;
}
#if HAVE_LIBXSLT
static xmlNode *
apply_transformation(xmlNode * xml, const char *transform)
{
char *xform = NULL;
xmlNode *out = NULL;
xmlDocPtr res = NULL;
xmlDocPtr doc = NULL;
xsltStylesheet *xslt = NULL;
CRM_CHECK(xml != NULL, return FALSE);
doc = getDocPtr(xml);
xform = get_schema_path(transform);
xmlLoadExtDtdDefaultValue = 1;
xmlSubstituteEntitiesDefault(1);
xslt = xsltParseStylesheetFile((const xmlChar *)xform);
CRM_CHECK(xslt != NULL, goto cleanup);
res = xsltApplyStylesheet(xslt, doc, NULL);
CRM_CHECK(res != NULL, goto cleanup);
out = xmlDocGetRootElement(res);
cleanup:
if (xslt) {
xsltFreeStylesheet(xslt);
}
free(xform);
return out;
}
#endif
const char *
get_schema_name(int version)
{
if (version < 0 || version >= all_schemas) {
return "unknown";
}
return known_schemas[version].name;
}
int
get_schema_version(const char *name)
{
int lpc = 0;
for (; lpc < all_schemas; lpc++) {
if (safe_str_eq(name, known_schemas[lpc].name)) {
return lpc;
}
}
return -1;
}
/* set which validation to use */
#include <crm/cib.h>
int
update_validation(xmlNode ** xml_blob, int *best, gboolean transform, gboolean to_logs)
{
xmlNode *xml = NULL;
char *value = NULL;
int lpc = 0, match = -1, rc = pcmk_ok;
CRM_CHECK(best != NULL, return -EINVAL);
CRM_CHECK(xml_blob != NULL, return -EINVAL);
CRM_CHECK(*xml_blob != NULL, return -EINVAL);
*best = 0;
xml = *xml_blob;
value = crm_element_value_copy(xml, XML_ATTR_VALIDATION);
if (value != NULL) {
match = get_schema_version(value);
lpc = match;
if (lpc >= 0 && transform == FALSE) {
lpc++;
} else if (lpc < 0) {
crm_debug("Unknown validation type");
lpc = 0;
}
}
if (match >= max_schemas) {
/* nothing to do */
free(value);
*best = match;
return pcmk_ok;
}
for (; lpc < max_schemas; lpc++) {
gboolean valid = TRUE;
crm_debug("Testing '%s' validation",
known_schemas[lpc].name ? known_schemas[lpc].name : "<unset>");
valid = validate_with(xml, lpc, to_logs);
if (valid) {
*best = lpc;
}
if (valid && transform) {
xmlNode *upgrade = NULL;
int next = known_schemas[lpc].after_transform;
if (next <= 0) {
next = lpc + 1;
}
crm_notice("Upgrading %s-style configuration to %s with %s",
known_schemas[lpc].name, known_schemas[next].name,
known_schemas[lpc].transform ? known_schemas[lpc].transform : "no-op");
if (known_schemas[lpc].transform == NULL) {
if (validate_with(xml, next, to_logs)) {
crm_debug("Configuration valid for schema: %s", known_schemas[next].name);
lpc = next;
*best = next;
rc = pcmk_ok;
} else {
crm_info("Configuration not valid for schema: %s", known_schemas[next].name);
}
} else {
#if HAVE_LIBXSLT
upgrade = apply_transformation(xml, known_schemas[lpc].transform);
#endif
if (upgrade == NULL) {
crm_err("Transformation %s failed", known_schemas[lpc].transform);
rc = -pcmk_err_transform_failed;
} else if (validate_with(upgrade, next, to_logs)) {
crm_info("Transformation %s successful", known_schemas[lpc].transform);
lpc = next;
*best = next;
free_xml(xml);
xml = upgrade;
rc = pcmk_ok;
} else {
crm_err("Transformation %s did not produce a valid configuration",
known_schemas[lpc].transform);
crm_log_xml_info(upgrade, "transform:bad");
free_xml(upgrade);
rc = -pcmk_err_dtd_validation;
}
}
}
}
if (*best > match) {
crm_notice("Upgraded from %s to %s validation", value ? value : "<none>",
known_schemas[*best].name);
crm_xml_add(xml, XML_ATTR_VALIDATION, known_schemas[*best].name);
}
*xml_blob = xml;
free(value);
return rc;
}
/*
* From xpath2.c
*
* All the elements returned by an XPath query are pointers to
* elements from the tree *except* namespace nodes where the XPath
* semantic is different from the implementation in libxml2 tree.
* As a result when a returned node set is freed when
* xmlXPathFreeObject() is called, that routine must check the
* element type. But node from the returned set may have been removed
* by xmlNodeSetContent() resulting in access to freed data.
*
* This can be exercised by running
* valgrind xpath2 test3.xml '//discarded' discarded
*
* There is 2 ways around it:
* - make a copy of the pointers to the nodes from the result set
* then call xmlXPathFreeObject() and then modify the nodes
* or
* - remove the references from the node set, if they are not
namespace nodes, before calling xmlXPathFreeObject().
*/
void
freeXpathObject(xmlXPathObjectPtr xpathObj)
{
int lpc, max = numXpathResults(xpathObj);
if(xpathObj == NULL) {
return;
}
for(lpc = 0; lpc < max; lpc++) {
if (xpathObj->nodesetval->nodeTab[lpc] && xpathObj->nodesetval->nodeTab[lpc]->type != XML_NAMESPACE_DECL) {
xpathObj->nodesetval->nodeTab[lpc] = NULL;
}
}
/* _Now_ its safe to free it */
xmlXPathFreeObject(xpathObj);
}
xmlNode *
getXpathResult(xmlXPathObjectPtr xpathObj, int index)
{
xmlNode *match = NULL;
int max = numXpathResults(xpathObj);
CRM_CHECK(index >= 0, return NULL);
CRM_CHECK(xpathObj != NULL, return NULL);
if (index >= max) {
crm_err("Requested index %d of only %d items", index, max);
return NULL;
} else if(xpathObj->nodesetval->nodeTab[index] == NULL) {
/* Previously requested */
return NULL;
}
match = xpathObj->nodesetval->nodeTab[index];
CRM_CHECK(match != NULL, return NULL);
if (xpathObj->nodesetval->nodeTab[index]->type != XML_NAMESPACE_DECL) {
/* See the comment for freeXpathObject() */
xpathObj->nodesetval->nodeTab[index] = NULL;
}
if (match->type == XML_DOCUMENT_NODE) {
/* Will happen if section = '/' */
match = match->children;
} else if (match->type != XML_ELEMENT_NODE
&& match->parent && match->parent->type == XML_ELEMENT_NODE) {
/* reurning the parent instead */
match = match->parent;
} else if (match->type != XML_ELEMENT_NODE) {
/* We only support searching nodes */
crm_err("We only support %d not %d", XML_ELEMENT_NODE, match->type);
match = NULL;
}
return match;
}
/* the caller needs to check if the result contains a xmlDocPtr or xmlNodePtr */
xmlXPathObjectPtr
xpath_search(xmlNode * xml_top, const char *path)
{
xmlDocPtr doc = NULL;
xmlXPathObjectPtr xpathObj = NULL;
xmlXPathContextPtr xpathCtx = NULL;
const xmlChar *xpathExpr = (const xmlChar *)path;
CRM_CHECK(path != NULL, return NULL);
CRM_CHECK(xml_top != NULL, return NULL);
CRM_CHECK(strlen(path) > 0, return NULL);
doc = getDocPtr(xml_top);
xpathCtx = xmlXPathNewContext(doc);
CRM_ASSERT(xpathCtx != NULL);
xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx);
xmlXPathFreeContext(xpathCtx);
return xpathObj;
}
gboolean
cli_config_update(xmlNode ** xml, int *best_version, gboolean to_logs)
{
gboolean rc = TRUE;
static int min_version = -1;
static int max_version = -1;
const char *value = crm_element_value(*xml, XML_ATTR_VALIDATION);
int version = get_schema_version(value);
if (min_version < 0) {
min_version = get_schema_version(MINIMUM_SCHEMA_VERSION);
}
if (max_version < 0) {
max_version = get_schema_version(LATEST_SCHEMA_VERSION);
}
if (version < min_version) {
xmlNode *converted = NULL;
converted = copy_xml(*xml);
update_validation(&converted, &version, TRUE, to_logs);
value = crm_element_value(converted, XML_ATTR_VALIDATION);
if (version < min_version) {
if (to_logs) {
crm_config_err("Your current configuration could only be upgraded to %s... "
"the minimum requirement is %s.\n", crm_str(value),
MINIMUM_SCHEMA_VERSION);
} else {
fprintf(stderr, "Your current configuration could only be upgraded to %s... "
"the minimum requirement is %s.\n", crm_str(value), MINIMUM_SCHEMA_VERSION);
}
free_xml(converted);
converted = NULL;
rc = FALSE;
} else {
free_xml(*xml);
*xml = converted;
if (version < max_version) {
crm_config_warn("Your configuration was internally updated to %s... "
"which is acceptable but not the most recent",
get_schema_name(version));
} else if (to_logs) {
crm_info("Your configuration was internally updated to the latest version (%s)",
get_schema_name(version));
}
}
} else if (version > max_version) {
if (to_logs) {
crm_config_warn("Configuration validation is currently disabled."
" It is highly encouraged and prevents many common cluster issues.");
} else {
fprintf(stderr, "Configuration validation is currently disabled."
" It is highly encouraged and prevents many common cluster issues.\n");
}
}
if (best_version) {
*best_version = version;
}
return rc;
}
xmlNode *
expand_idref(xmlNode * input, xmlNode * top)
{
const char *tag = NULL;
const char *ref = NULL;
xmlNode *result = input;
char *xpath_string = NULL;
if (result == NULL) {
return NULL;
} else if (top == NULL) {
top = input;
}
tag = crm_element_name(result);
ref = crm_element_value(result, XML_ATTR_IDREF);
if (ref != NULL) {
int xpath_max = 512, offset = 0;
xpath_string = calloc(1, xpath_max);
offset += snprintf(xpath_string + offset, xpath_max - offset, "//%s[@id='%s']", tag, ref);
result = get_xpath_object(xpath_string, top, LOG_ERR);
if (result == NULL) {
char *nodePath = (char *)xmlGetNodePath(top);
crm_err("No match for %s found in %s: Invalid configuration", xpath_string,
crm_str(nodePath));
free(nodePath);
}
}
free(xpath_string);
return result;
}
xmlNode *
get_xpath_object_relative(const char *xpath, xmlNode * xml_obj, int error_level)
{
int len = 0;
xmlNode *result = NULL;
char *xpath_full = NULL;
char *xpath_prefix = NULL;
if (xml_obj == NULL || xpath == NULL) {
return NULL;
}
xpath_prefix = (char *)xmlGetNodePath(xml_obj);
len += strlen(xpath_prefix);
len += strlen(xpath);
xpath_full = strdup(xpath_prefix);
xpath_full = realloc(xpath_full, len + 1);
strncat(xpath_full, xpath, len);
result = get_xpath_object(xpath_full, xml_obj, error_level);
free(xpath_prefix);
free(xpath_full);
return result;
}
xmlNode *
get_xpath_object(const char *xpath, xmlNode * xml_obj, int error_level)
{
int max;
xmlNode *result = NULL;
xmlXPathObjectPtr xpathObj = NULL;
char *nodePath = NULL;
char *matchNodePath = NULL;
if (xpath == NULL) {
return xml_obj; /* or return NULL? */
}
xpathObj = xpath_search(xml_obj, xpath);
nodePath = (char *)xmlGetNodePath(xml_obj);
max = numXpathResults(xpathObj);
if (max < 1) {
do_crm_log(error_level, "No match for %s in %s", xpath, crm_str(nodePath));
crm_log_xml_explicit(xml_obj, "Unexpected Input");
} else if (max > 1) {
int lpc = 0;
do_crm_log(error_level, "Too many matches for %s in %s", xpath, crm_str(nodePath));
for (lpc = 0; lpc < max; lpc++) {
xmlNode *match = getXpathResult(xpathObj, lpc);
CRM_CHECK(match != NULL, continue);
matchNodePath = (char *)xmlGetNodePath(match);
do_crm_log(error_level, "%s[%d] = %s", xpath, lpc, crm_str(matchNodePath));
free(matchNodePath);
}
crm_log_xml_explicit(xml_obj, "Bad Input");
} else {
result = getXpathResult(xpathObj, 0);
}
freeXpathObject(xpathObj);
free(nodePath);
return result;
}
const char *
crm_element_value(xmlNode * data, const char *name)
{
xmlAttr *attr = NULL;
if (data == NULL) {
crm_err("Couldn't find %s in NULL", name ? name : "<null>");
CRM_LOG_ASSERT(data != NULL);
return NULL;
} else if (name == NULL) {
crm_err("Couldn't find NULL in %s", crm_element_name(data));
return NULL;
}
attr = xmlHasProp(data, (const xmlChar *)name);
if (attr == NULL || attr->children == NULL) {
return NULL;
}
return (const char *)attr->children->content;
}