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diff --git a/lib/common/acl.c b/lib/common/acl.c
index 02caa180e1..a6f93d9337 100644
--- a/lib/common/acl.c
+++ b/lib/common/acl.c
@@ -1,819 +1,844 @@
/*
* Copyright 2004-2022 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU Lesser General Public License
* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
*/
#include <crm_internal.h>
#include <stdio.h>
#include <sys/types.h>
#include <pwd.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <libxml/tree.h>
#include <crm/crm.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crm/common/xml_internal.h>
#include "crmcommon_private.h"
#define MAX_XPATH_LEN 4096
typedef struct xml_acl_s {
enum xml_private_flags mode;
char *xpath;
} xml_acl_t;
static void
free_acl(void *data)
{
if (data) {
xml_acl_t *acl = data;
free(acl->xpath);
free(acl);
}
}
void
pcmk__free_acls(GList *acls)
{
g_list_free_full(acls, free_acl);
}
static GList *
create_acl(xmlNode *xml, GList *acls, enum xml_private_flags mode)
{
xml_acl_t *acl = NULL;
const char *tag = crm_element_value(xml, XML_ACL_ATTR_TAG);
const char *ref = crm_element_value(xml, XML_ACL_ATTR_REF);
const char *xpath = crm_element_value(xml, XML_ACL_ATTR_XPATH);
const char *attr = crm_element_value(xml, XML_ACL_ATTR_ATTRIBUTE);
if (tag == NULL) {
// @COMPAT rolling upgrades <=1.1.11
tag = crm_element_value(xml, XML_ACL_ATTR_TAGv1);
}
if (ref == NULL) {
// @COMPAT rolling upgrades <=1.1.11
ref = crm_element_value(xml, XML_ACL_ATTR_REFv1);
}
if ((tag == NULL) && (ref == NULL) && (xpath == NULL)) {
// Schema should prevent this, but to be safe ...
crm_trace("Ignoring ACL <%s> element without selection criteria",
crm_element_name(xml));
return NULL;
}
acl = calloc(1, sizeof (xml_acl_t));
CRM_ASSERT(acl != NULL);
acl->mode = mode;
if (xpath) {
acl->xpath = strdup(xpath);
CRM_ASSERT(acl->xpath != NULL);
crm_trace("Unpacked ACL <%s> element using xpath: %s",
crm_element_name(xml), acl->xpath);
} else {
int offset = 0;
char buffer[MAX_XPATH_LEN];
if (tag) {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
"//%s", tag);
} else {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
"//*");
}
if (ref || attr) {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
"[");
}
if (ref) {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
"@id='%s'", ref);
}
// NOTE: schema currently does not allow this
if (ref && attr) {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
" and ");
}
if (attr) {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
"@%s", attr);
}
if (ref || attr) {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
"]");
}
CRM_LOG_ASSERT(offset > 0);
acl->xpath = strdup(buffer);
CRM_ASSERT(acl->xpath != NULL);
crm_trace("Unpacked ACL <%s> element as xpath: %s",
crm_element_name(xml), acl->xpath);
}
return g_list_append(acls, acl);
}
/*!
* \internal
* \brief Unpack a user, group, or role subtree of the ACLs section
*
* \param[in] acl_top XML of entire ACLs section
* \param[in] acl_entry XML of ACL element being unpacked
* \param[in,out] acls List of ACLs unpacked so far
*
* \return New head of (possibly modified) acls
*
* \note This function is recursive
*/
static GList *
parse_acl_entry(xmlNode *acl_top, xmlNode *acl_entry, GList *acls)
{
xmlNode *child = NULL;
for (child = pcmk__xe_first_child(acl_entry); child;
child = pcmk__xe_next(child)) {
const char *tag = crm_element_name(child);
const char *kind = crm_element_value(child, XML_ACL_ATTR_KIND);
if (strcmp(XML_ACL_TAG_PERMISSION, tag) == 0){
CRM_ASSERT(kind != NULL);
crm_trace("Unpacking ACL <%s> element of kind '%s'", tag, kind);
tag = kind;
} else {
crm_trace("Unpacking ACL <%s> element", tag);
}
if (strcmp(XML_ACL_TAG_ROLE_REF, tag) == 0
|| strcmp(XML_ACL_TAG_ROLE_REFv1, tag) == 0) {
const char *ref_role = crm_element_value(child, XML_ATTR_ID);
if (ref_role) {
xmlNode *role = NULL;
for (role = pcmk__xe_first_child(acl_top); role;
role = pcmk__xe_next(role)) {
if (!strcmp(XML_ACL_TAG_ROLE, (const char *) role->name)) {
const char *role_id = crm_element_value(role,
XML_ATTR_ID);
if (role_id && strcmp(ref_role, role_id) == 0) {
crm_trace("Unpacking referenced role '%s' in ACL <%s> element",
role_id, crm_element_name(acl_entry));
acls = parse_acl_entry(acl_top, role, acls);
break;
}
}
}
}
} else if (strcmp(XML_ACL_TAG_READ, tag) == 0) {
acls = create_acl(child, acls, pcmk__xf_acl_read);
} else if (strcmp(XML_ACL_TAG_WRITE, tag) == 0) {
acls = create_acl(child, acls, pcmk__xf_acl_write);
} else if (strcmp(XML_ACL_TAG_DENY, tag) == 0) {
acls = create_acl(child, acls, pcmk__xf_acl_deny);
} else {
crm_warn("Ignoring unknown ACL %s '%s'",
(kind? "kind" : "element"), tag);
}
}
return acls;
}
/*
<acls>
<acl_target id="l33t-haxor"><role id="auto-l33t-haxor"/></acl_target>
<acl_role id="auto-l33t-haxor">
<acl_permission id="crook-nothing" kind="deny" xpath="/cib"/>
</acl_role>
<acl_target id="niceguy">
<role id="observer"/>
</acl_target>
<acl_role id="observer">
<acl_permission id="observer-read-1" kind="read" xpath="/cib"/>
<acl_permission id="observer-write-1" kind="write" xpath="//nvpair[@name='stonith-enabled']"/>
<acl_permission id="observer-write-2" kind="write" xpath="//nvpair[@name='target-role']"/>
</acl_role>
<acl_target id="badidea"><role id="auto-badidea"/></acl_target>
<acl_role id="auto-badidea">
<acl_permission id="badidea-resources" kind="read" xpath="//meta_attributes"/>
<acl_permission id="badidea-resources-2" kind="deny" reference="dummy-meta_attributes"/>
</acl_role>
</acls>
*/
static const char *
acl_to_text(enum xml_private_flags flags)
{
if (pcmk_is_set(flags, pcmk__xf_acl_deny)) {
return "deny";
} else if (pcmk_any_flags_set(flags, pcmk__xf_acl_write|pcmk__xf_acl_create)) {
return "read/write";
} else if (pcmk_is_set(flags, pcmk__xf_acl_read)) {
return "read";
}
return "none";
}
void
pcmk__apply_acl(xmlNode *xml)
{
GList *aIter = NULL;
xml_private_t *p = xml->doc->_private;
xmlXPathObjectPtr xpathObj = NULL;
if (!xml_acl_enabled(xml)) {
crm_trace("Skipping ACLs for user '%s' because not enabled for this XML",
p->user);
return;
}
for (aIter = p->acls; aIter != NULL; aIter = aIter->next) {
int max = 0, lpc = 0;
xml_acl_t *acl = aIter->data;
xpathObj = xpath_search(xml, acl->xpath);
max = numXpathResults(xpathObj);
for (lpc = 0; lpc < max; lpc++) {
xmlNode *match = getXpathResult(xpathObj, lpc);
char *path = xml_get_path(match);
p = match->_private;
crm_trace("Applying %s ACL to %s matched by %s",
acl_to_text(acl->mode), path, acl->xpath);
pcmk__set_xml_flags(p, acl->mode);
free(path);
}
crm_trace("Applied %s ACL %s (%d match%s)",
acl_to_text(acl->mode), acl->xpath, max,
((max == 1)? "" : "es"));
freeXpathObject(xpathObj);
}
}
/*!
* \internal
* \brief Unpack ACLs for a given user into the
* metadata of the target XML tree
*
* Taking the description of ACLs from the source XML tree and
* marking up the target XML tree with access information for the
* given user by tacking it onto the relevant nodes
*
* \param[in] source XML with ACL definitions
* \param[in,out] target XML that ACLs will be applied to
* \param[in] user Username whose ACLs need to be unpacked
*/
void
pcmk__unpack_acl(xmlNode *source, xmlNode *target, const char *user)
{
xml_private_t *p = NULL;
if ((target == NULL) || (target->doc == NULL)
|| (target->doc->_private == NULL)) {
return;
}
p = target->doc->_private;
if (!pcmk_acl_required(user)) {
crm_trace("Not unpacking ACLs because not required for user '%s'",
user);
} else if (p->acls == NULL) {
xmlNode *acls = get_xpath_object("//" XML_CIB_TAG_ACLS,
source, LOG_NEVER);
pcmk__str_update(&p->user, user);
if (acls) {
xmlNode *child = NULL;
for (child = pcmk__xe_first_child(acls); child;
child = pcmk__xe_next(child)) {
const char *tag = crm_element_name(child);
if (!strcmp(tag, XML_ACL_TAG_USER)
|| !strcmp(tag, XML_ACL_TAG_USERv1)) {
const char *id = crm_element_value(child, XML_ATTR_NAME);
if (id == NULL) {
id = crm_element_value(child, XML_ATTR_ID);
}
if (id && strcmp(id, user) == 0) {
crm_debug("Unpacking ACLs for user '%s'", id);
p->acls = parse_acl_entry(acls, child, p->acls);
}
} else if (!strcmp(tag, XML_ACL_TAG_GROUP)) {
const char *id = crm_element_value(child, XML_ATTR_NAME);
if (id == NULL) {
id = crm_element_value(child, XML_ATTR_ID);
}
if (id && pcmk__is_user_in_group(user,id)) {
crm_debug("Unpacking ACLs for group '%s'", id);
p->acls = parse_acl_entry(acls, child, p->acls);
}
}
}
}
}
}
/*!
* \internal
* \brief Copy source to target and set xf_acl_enabled flag in target
*
* \param[in] acl_source XML with ACL definitions
* \param[in,out] target XML that ACLs will be applied to
* \param[in] user Username whose ACLs need to be set
*/
void
pcmk__enable_acl(xmlNode *acl_source, xmlNode *target, const char *user)
{
pcmk__unpack_acl(acl_source, target, user);
pcmk__set_xml_doc_flag(target, pcmk__xf_acl_enabled);
pcmk__apply_acl(target);
}
static inline bool
test_acl_mode(enum xml_private_flags allowed, enum xml_private_flags requested)
{
if (pcmk_is_set(allowed, pcmk__xf_acl_deny)) {
return false;
} else if (pcmk_all_flags_set(allowed, requested)) {
return true;
} else if (pcmk_is_set(requested, pcmk__xf_acl_read)
&& pcmk_is_set(allowed, pcmk__xf_acl_write)) {
return true;
} else if (pcmk_is_set(requested, pcmk__xf_acl_create)
&& pcmk_any_flags_set(allowed, pcmk__xf_acl_write|pcmk__xf_created)) {
return true;
}
return false;
}
+/*!
+ * \internal
+ * \brief Rid XML tree of all unreadable nodes and node properties
+ *
+ * \param[in] xml root node to be purged of attributes
+ *
+ * \return true if this node or any of its children are readable
+ * if false is returned, xml will be freed
+ *
+ * \note This function is recursive
+ */
static bool
purge_xml_attributes(xmlNode *xml)
{
xmlNode *child = NULL;
xmlAttr *xIter = NULL;
bool readable_children = false;
xml_private_t *p = xml->_private;
if (test_acl_mode(p->flags, pcmk__xf_acl_read)) {
crm_trace("%s[@id=%s] is readable", crm_element_name(xml), ID(xml));
return true;
}
xIter = xml->properties;
while (xIter != NULL) {
xmlAttr *tmp = xIter;
const char *prop_name = (const char *)xIter->name;
xIter = xIter->next;
if (strcmp(prop_name, XML_ATTR_ID) == 0) {
continue;
}
xmlUnsetProp(xml, tmp->name);
}
child = pcmk__xml_first_child(xml);
while ( child != NULL ) {
xmlNode *tmp = child;
child = pcmk__xml_next(child);
readable_children |= purge_xml_attributes(tmp);
}
if (!readable_children) {
free_xml(xml); /* Nothing readable under here, purge completely */
}
return readable_children;
}
/*!
* \brief Copy ACL-allowed portions of specified XML
*
* \param[in] user Username whose ACLs should be used
* \param[in] acl_source XML containing ACLs
* \param[in] xml XML to be copied
* \param[out] result Copy of XML portions readable via ACLs
*
* \return true if xml exists and ACLs are required for user, false otherwise
* \note If this returns true, caller should use \p result rather than \p xml
*/
bool
xml_acl_filtered_copy(const char *user, xmlNode *acl_source, xmlNode *xml,
xmlNode **result)
{
GList *aIter = NULL;
xmlNode *target = NULL;
xml_private_t *doc = NULL;
*result = NULL;
if ((xml == NULL) || !pcmk_acl_required(user)) {
crm_trace("Not filtering XML because ACLs not required for user '%s'",
user);
return false;
}
crm_trace("Filtering XML copy using user '%s' ACLs", user);
target = copy_xml(xml);
if (target == NULL) {
return true;
}
pcmk__enable_acl(acl_source, target, user);
doc = target->doc->_private;
for(aIter = doc->acls; aIter != NULL && target; aIter = aIter->next) {
int max = 0;
xml_acl_t *acl = aIter->data;
if (acl->mode != pcmk__xf_acl_deny) {
/* Nothing to do */
} else if (acl->xpath) {
int lpc = 0;
xmlXPathObjectPtr xpathObj = xpath_search(target, acl->xpath);
max = numXpathResults(xpathObj);
for(lpc = 0; lpc < max; lpc++) {
xmlNode *match = getXpathResult(xpathObj, lpc);
if (!purge_xml_attributes(match) && (match == target)) {
crm_trace("ACLs deny user '%s' access to entire XML document",
user);
freeXpathObject(xpathObj);
return true;
}
}
crm_trace("ACLs deny user '%s' access to %s (%d %s)",
user, acl->xpath, max,
pcmk__plural_alt(max, "match", "matches"));
freeXpathObject(xpathObj);
}
}
if (!purge_xml_attributes(target)) {
crm_trace("ACLs deny user '%s' access to entire XML document", user);
return true;
}
if (doc->acls) {
g_list_free_full(doc->acls, free_acl);
doc->acls = NULL;
} else {
crm_trace("User '%s' without ACLs denied access to entire XML document",
user);
free_xml(target);
target = NULL;
}
if (target) {
*result = target;
}
return true;
}
/*!
* \internal
* \brief Check whether creation of an XML element is implicitly allowed
*
* Check whether XML is a "scaffolding" element whose creation is implicitly
* allowed regardless of ACLs (that is, it is not in the ACL section and has
* no attributes other than "id").
*
* \param[in] xml XML element to check
*
* \return true if XML element is implicitly allowed, false otherwise
*/
static bool
implicitly_allowed(xmlNode *xml)
{
char *path = NULL;
for (xmlAttr *prop = xml->properties; prop != NULL; prop = prop->next) {
if (strcmp((const char *) prop->name, XML_ATTR_ID) != 0) {
return false;
}
}
path = xml_get_path(xml);
if (strstr(path, "/" XML_CIB_TAG_ACLS "/") != NULL) {
free(path);
return false;
}
free(path);
return true;
}
#define display_id(xml) (ID(xml)? ID(xml) : "<unset>")
/*!
* \internal
* \brief Drop XML nodes created in violation of ACLs
*
* Given an XML element, free all of its descendent nodes created in violation
* of ACLs, with the exception of allowing "scaffolding" elements (i.e. those
* that aren't in the ACL section and don't have any attributes other than
* "id").
*
* \param[in,out] xml XML to check
* \param[in] check_top Whether to apply checks to argument itself
* (if true, xml might get freed)
*
* \note This function is recursive
*/
void
pcmk__apply_creation_acl(xmlNode *xml, bool check_top)
{
xml_private_t *p = xml->_private;
if (pcmk_is_set(p->flags, pcmk__xf_created)) {
if (implicitly_allowed(xml)) {
crm_trace("Creation of <%s> scaffolding with id=\"%s\""
" is implicitly allowed",
crm_element_name(xml), display_id(xml));
} else if (pcmk__check_acl(xml, NULL, pcmk__xf_acl_write)) {
crm_trace("ACLs allow creation of <%s> with id=\"%s\"",
crm_element_name(xml), display_id(xml));
} else if (check_top) {
crm_trace("ACLs disallow creation of <%s> with id=\"%s\"",
crm_element_name(xml), display_id(xml));
pcmk_free_xml_subtree(xml);
return;
} else {
crm_notice("ACLs would disallow creation of %s<%s> with id=\"%s\" ",
((xml == xmlDocGetRootElement(xml->doc))? "root element " : ""),
crm_element_name(xml), display_id(xml));
}
}
for (xmlNode *cIter = pcmk__xml_first_child(xml); cIter != NULL; ) {
xmlNode *child = cIter;
cIter = pcmk__xml_next(cIter); /* In case it is free'd */
pcmk__apply_creation_acl(child, true);
}
}
+/*!
+ * \brief Check whether or not an XML node is ACL-denied
+ *
+ * \param[in] xml node to check
+ *
+ * \return true if XML node exists and is ACL-denied, false otherwise
+ */
bool
xml_acl_denied(xmlNode *xml)
{
if (xml && xml->doc && xml->doc->_private){
xml_private_t *p = xml->doc->_private;
return pcmk_is_set(p->flags, pcmk__xf_acl_denied);
}
return false;
}
void
xml_acl_disable(xmlNode *xml)
{
if (xml_acl_enabled(xml)) {
xml_private_t *p = xml->doc->_private;
/* Catch anything that was created but shouldn't have been */
pcmk__apply_acl(xml);
pcmk__apply_creation_acl(xml, false);
pcmk__clear_xml_flags(p, pcmk__xf_acl_enabled);
}
}
+/*!
+ * \brief Check whether or not an XML node is ACL-enabled
+ *
+ * \param[in] xml node to check
+ *
+ * \return true if XML node exists and is ACL-enabled, false otherwise
+ */
bool
xml_acl_enabled(xmlNode *xml)
{
if (xml && xml->doc && xml->doc->_private){
xml_private_t *p = xml->doc->_private;
return pcmk_is_set(p->flags, pcmk__xf_acl_enabled);
}
return false;
}
bool
pcmk__check_acl(xmlNode *xml, const char *name, enum xml_private_flags mode)
{
CRM_ASSERT(xml);
CRM_ASSERT(xml->doc);
CRM_ASSERT(xml->doc->_private);
if (pcmk__tracking_xml_changes(xml, false) && xml_acl_enabled(xml)) {
int offset = 0;
xmlNode *parent = xml;
char buffer[MAX_XPATH_LEN];
xml_private_t *docp = xml->doc->_private;
offset = pcmk__element_xpath(NULL, xml, buffer, offset,
sizeof(buffer));
if (name) {
offset += snprintf(buffer + offset, MAX_XPATH_LEN - offset,
"[@%s]", name);
}
CRM_LOG_ASSERT(offset > 0);
if (docp->acls == NULL) {
crm_trace("User '%s' without ACLs denied %s access to %s",
docp->user, acl_to_text(mode), buffer);
pcmk__set_xml_doc_flag(xml, pcmk__xf_acl_denied);
return false;
}
/* Walk the tree upwards looking for xml_acl_* flags
* - Creating an attribute requires write permissions for the node
* - Creating a child requires write permissions for the parent
*/
if (name) {
xmlAttr *attr = xmlHasProp(xml, (pcmkXmlStr) name);
if (attr && mode == pcmk__xf_acl_create) {
mode = pcmk__xf_acl_write;
}
}
while (parent && parent->_private) {
xml_private_t *p = parent->_private;
if (test_acl_mode(p->flags, mode)) {
return true;
} else if (pcmk_is_set(p->flags, pcmk__xf_acl_deny)) {
crm_trace("%sACL denies user '%s' %s access to %s",
(parent != xml) ? "Parent " : "", docp->user,
acl_to_text(mode), buffer);
pcmk__set_xml_doc_flag(xml, pcmk__xf_acl_denied);
return false;
}
parent = parent->parent;
}
crm_trace("Default ACL denies user '%s' %s access to %s",
docp->user, acl_to_text(mode), buffer);
pcmk__set_xml_doc_flag(xml, pcmk__xf_acl_denied);
return false;
}
return true;
}
/*!
* \brief Check whether ACLs are required for a given user
*
* \param[in] User name to check
*
* \return true if the user requires ACLs, false otherwise
*/
bool
pcmk_acl_required(const char *user)
{
if (pcmk__str_empty(user)) {
crm_trace("ACLs not required because no user set");
return false;
} else if (!strcmp(user, CRM_DAEMON_USER) || !strcmp(user, "root")) {
crm_trace("ACLs not required for privileged user %s", user);
return false;
}
crm_trace("ACLs required for %s", user);
return true;
}
char *
pcmk__uid2username(uid_t uid)
{
struct passwd *pwent = getpwuid(uid);
if (pwent == NULL) {
crm_perror(LOG_INFO, "Cannot get user details for user ID %d", uid);
return NULL;
}
return strdup(pwent->pw_name);
}
/*!
* \internal
* \brief Set the ACL user field properly on an XML request
*
* Multiple user names are potentially involved in an XML request: the effective
* user of the current process; the user name known from an IPC client
* connection; and the user name obtained from the request itself, whether by
* the current standard XML attribute name or an older legacy attribute name.
* This function chooses the appropriate one that should be used for ACLs, sets
* it in the request (using the standard attribute name, and the legacy name if
* given), and returns it.
*
* \param[in,out] request XML request to update
* \param[in] field Alternate name for ACL user name XML attribute
* \param[in] peer_user User name as known from IPC connection
*
* \return ACL user name actually used
*/
const char *
pcmk__update_acl_user(xmlNode *request, const char *field,
const char *peer_user)
{
static const char *effective_user = NULL;
const char *requested_user = NULL;
const char *user = NULL;
if (effective_user == NULL) {
effective_user = pcmk__uid2username(geteuid());
if (effective_user == NULL) {
effective_user = strdup("#unprivileged");
CRM_CHECK(effective_user != NULL, return NULL);
crm_err("Unable to determine effective user, assuming unprivileged for ACLs");
}
}
requested_user = crm_element_value(request, XML_ACL_TAG_USER);
if (requested_user == NULL) {
/* @COMPAT rolling upgrades <=1.1.11
*
* field is checked for backward compatibility with older versions that
* did not use XML_ACL_TAG_USER.
*/
requested_user = crm_element_value(request, field);
}
if (!pcmk__is_privileged(effective_user)) {
/* We're not running as a privileged user, set or overwrite any existing
* value for $XML_ACL_TAG_USER
*/
user = effective_user;
} else if (peer_user == NULL && requested_user == NULL) {
/* No user known or requested, use 'effective_user' and make sure one is
* set for the request
*/
user = effective_user;
} else if (peer_user == NULL) {
/* No user known, trusting 'requested_user' */
user = requested_user;
} else if (!pcmk__is_privileged(peer_user)) {
/* The peer is not a privileged user, set or overwrite any existing
* value for $XML_ACL_TAG_USER
*/
user = peer_user;
} else if (requested_user == NULL) {
/* Even if we're privileged, make sure there is always a value set */
user = peer_user;
} else {
/* Legal delegation to 'requested_user' */
user = requested_user;
}
// This requires pointer comparison, not string comparison
if (user != crm_element_value(request, XML_ACL_TAG_USER)) {
crm_xml_add(request, XML_ACL_TAG_USER, user);
}
if (field != NULL && user != crm_element_value(request, field)) {
crm_xml_add(request, field, user);
}
return requested_user;
}
diff --git a/lib/common/xml.c b/lib/common/xml.c
index 3b86094751..709da9d43d 100644
--- a/lib/common/xml.c
+++ b/lib/common/xml.c
@@ -1,3000 +1,3017 @@
/*
* Copyright 2004-2022 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU Lesser General Public License
* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
*/
#include <crm_internal.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <bzlib.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xmlIO.h> /* xmlAllocOutputBuffer */
#include <crm/crm.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crm/common/xml_internal.h> // PCMK__XML_LOG_BASE, etc.
#include "crmcommon_private.h"
// Define this as 1 in development to get insanely verbose trace messages
#ifndef XML_PARSER_DEBUG
#define XML_PARSER_DEBUG 0
#endif
/* @TODO XML_PARSE_RECOVER allows some XML errors to be silently worked around
* by libxml2, which is potentially ambiguous and dangerous. We should drop it
* when we can break backward compatibility with configurations that might be
* relying on it (i.e. pacemaker 3.0.0).
*
* It might be a good idea to have a transitional period where we first try
* parsing without XML_PARSE_RECOVER, and if that fails, try parsing again with
* it, logging a warning if it succeeds.
*/
#define PCMK__XML_PARSE_OPTS (XML_PARSE_NOBLANKS | XML_PARSE_RECOVER)
#define CHUNK_SIZE 1024
bool
pcmk__tracking_xml_changes(xmlNode *xml, bool lazy)
{
if(xml == NULL || xml->doc == NULL || xml->doc->_private == NULL) {
return FALSE;
} else if (!pcmk_is_set(((xml_private_t *)xml->doc->_private)->flags,
pcmk__xf_tracking)) {
return FALSE;
} else if (lazy && !pcmk_is_set(((xml_private_t *)xml->doc->_private)->flags,
pcmk__xf_lazy)) {
return FALSE;
}
return TRUE;
}
#define buffer_print(buffer, max, offset, fmt, args...) do { \
int rc = (max); \
if(buffer) { \
rc = snprintf((buffer) + (offset), (max) - (offset), fmt, ##args); \
} \
if(buffer && rc < 0) { \
crm_perror(LOG_ERR, "snprintf failed at offset %d", offset); \
(buffer)[(offset)] = 0; \
break; \
} else if(rc >= ((max) - (offset))) { \
char *tmp = NULL; \
(max) = QB_MAX(CHUNK_SIZE, (max) * 2); \
tmp = pcmk__realloc((buffer), (max)); \
CRM_ASSERT(tmp); \
(buffer) = tmp; \
} 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) = pcmk__realloc((*buffer), (*max));
}
memset((*buffer) + (*offset), ' ', spaces);
(*offset) += spaces;
}
}
static void
set_parent_flag(xmlNode *xml, long flag)
{
for(; xml; xml = xml->parent) {
xml_private_t *p = xml->_private;
if(p == NULL) {
/* During calls to xmlDocCopyNode(), _private will be unset for parent nodes */
} else {
pcmk__set_xml_flags(p, flag);
}
}
}
void
pcmk__set_xml_doc_flag(xmlNode *xml, enum xml_private_flags flag)
{
if(xml && xml->doc && xml->doc->_private){
/* During calls to xmlDocCopyNode(), xml->doc may be unset */
xml_private_t *p = xml->doc->_private;
pcmk__set_xml_flags(p, flag);
}
}
// Mark document, element, and all element's parents as changed
static void
mark_xml_node_dirty(xmlNode *xml)
{
pcmk__set_xml_doc_flag(xml, pcmk__xf_dirty);
set_parent_flag(xml, pcmk__xf_dirty);
}
// Clear flags on XML node and its children
static void
reset_xml_node_flags(xmlNode *xml)
{
xmlNode *cIter = NULL;
xml_private_t *p = xml->_private;
if (p) {
p->flags = 0;
}
for (cIter = pcmk__xml_first_child(xml); cIter != NULL;
cIter = pcmk__xml_next(cIter)) {
reset_xml_node_flags(cIter);
}
}
// Set xpf_created flag on XML node and any children
void
pcmk__mark_xml_created(xmlNode *xml)
{
xmlNode *cIter = NULL;
xml_private_t *p = xml->_private;
if (p && pcmk__tracking_xml_changes(xml, FALSE)) {
if (!pcmk_is_set(p->flags, pcmk__xf_created)) {
pcmk__set_xml_flags(p, pcmk__xf_created);
mark_xml_node_dirty(xml);
}
for (cIter = pcmk__xml_first_child(xml); cIter != NULL;
cIter = pcmk__xml_next(cIter)) {
pcmk__mark_xml_created(cIter);
}
}
}
void
pcmk__mark_xml_attr_dirty(xmlAttr *a)
{
xmlNode *parent = a->parent;
xml_private_t *p = NULL;
p = a->_private;
pcmk__set_xml_flags(p, pcmk__xf_dirty|pcmk__xf_modified);
pcmk__clear_xml_flags(p, pcmk__xf_deleted);
mark_xml_node_dirty(parent);
}
#define XML_PRIVATE_MAGIC (long) 0x81726354
// Free an XML object previously marked as deleted
static void
free_deleted_object(void *data)
{
if(data) {
pcmk__deleted_xml_t *deleted_obj = data;
free(deleted_obj->path);
free(deleted_obj);
}
}
// Free and NULL user, ACLs, and deleted objects in an XML node's private data
static void
reset_xml_private_data(xml_private_t *p)
{
if(p) {
CRM_ASSERT(p->check == XML_PRIVATE_MAGIC);
free(p->user);
p->user = NULL;
if(p->acls) {
pcmk__free_acls(p->acls);
p->acls = NULL;
}
if(p->deleted_objs) {
g_list_free_full(p->deleted_objs, free_deleted_object);
p->deleted_objs = NULL;
}
}
}
// Free all private data associated with an XML node
static void
free_private_data(xmlNode *node)
{
/* need to explicitly avoid our custom _private field cleanup when
called from internal XSLT cleanup (xsltApplyStylesheetInternal
-> xsltFreeTransformContext -> xsltFreeRVTs -> xmlFreeDoc)
onto result tree fragments, represented as standalone documents
with otherwise infeasible space-prefixed name (xsltInternals.h:
XSLT_MARK_RES_TREE_FRAG) and carrying it's own load at _private
field -- later assert on the XML_PRIVATE_MAGIC would explode */
if (node->type != XML_DOCUMENT_NODE || node->name == NULL
|| node->name[0] != ' ') {
reset_xml_private_data(node->_private);
free(node->_private);
}
}
// Allocate and initialize private data for an XML node
static void
new_private_data(xmlNode *node)
{
xml_private_t *p = NULL;
switch(node->type) {
case XML_ELEMENT_NODE:
case XML_DOCUMENT_NODE:
case XML_ATTRIBUTE_NODE:
case XML_COMMENT_NODE:
p = calloc(1, sizeof(xml_private_t));
p->check = XML_PRIVATE_MAGIC;
/* Flags will be reset if necessary when tracking is enabled */
pcmk__set_xml_flags(p, pcmk__xf_dirty|pcmk__xf_created);
node->_private = p;
break;
case XML_TEXT_NODE:
case XML_DTD_NODE:
case XML_CDATA_SECTION_NODE:
break;
default:
/* Ignore */
crm_trace("Ignoring %p %d", node, node->type);
CRM_LOG_ASSERT(node->type == XML_ELEMENT_NODE);
break;
}
if(p && pcmk__tracking_xml_changes(node, FALSE)) {
/* XML_ELEMENT_NODE doesn't get picked up here, node->doc is
* not hooked up at the point we are called
*/
mark_xml_node_dirty(node);
}
}
void
xml_track_changes(xmlNode * xml, const char *user, xmlNode *acl_source, bool enforce_acls)
{
xml_accept_changes(xml);
crm_trace("Tracking changes%s to %p", enforce_acls?" with ACLs":"", xml);
pcmk__set_xml_doc_flag(xml, pcmk__xf_tracking);
if(enforce_acls) {
if(acl_source == NULL) {
acl_source = xml;
}
pcmk__set_xml_doc_flag(xml, pcmk__xf_acl_enabled);
pcmk__unpack_acl(acl_source, xml, user);
pcmk__apply_acl(xml);
}
}
bool xml_tracking_changes(xmlNode * xml)
{
return (xml != NULL) && (xml->doc != NULL) && (xml->doc->_private != NULL)
&& pcmk_is_set(((xml_private_t *)(xml->doc->_private))->flags,
pcmk__xf_tracking);
}
bool xml_document_dirty(xmlNode *xml)
{
return (xml != NULL) && (xml->doc != NULL) && (xml->doc->_private != NULL)
&& pcmk_is_set(((xml_private_t *)(xml->doc->_private))->flags,
pcmk__xf_dirty);
}
/*!
* \internal
* \brief Return ordinal position of an XML node among its siblings
*
* \param[in] xml XML node to check
* \param[in] ignore_if_set Don't count siblings with this flag set
*
* \return Ordinal position of \p xml (starting with 0)
*/
int
pcmk__xml_position(xmlNode *xml, enum xml_private_flags ignore_if_set)
{
int position = 0;
xmlNode *cIter = NULL;
for(cIter = xml; cIter->prev; cIter = cIter->prev) {
xml_private_t *p = ((xmlNode*)cIter->prev)->_private;
if (!pcmk_is_set(p->flags, ignore_if_set)) {
position++;
}
}
return position;
}
// This also clears attribute's flags if not marked as deleted
static bool
marked_as_deleted(xmlAttrPtr a, void *user_data)
{
xml_private_t *p = a->_private;
if (pcmk_is_set(p->flags, pcmk__xf_deleted)) {
return true;
}
p->flags = pcmk__xf_none;
return false;
}
// Remove all attributes marked as deleted from an XML node
static void
accept_attr_deletions(xmlNode *xml)
{
// Clear XML node's flags
((xml_private_t *) xml->_private)->flags = pcmk__xf_none;
// Remove this XML node's attributes that were marked as deleted
pcmk__xe_remove_matching_attrs(xml, marked_as_deleted, NULL);
// Recursively do the same for this XML node's children
for (xmlNodePtr cIter = pcmk__xml_first_child(xml); cIter != NULL;
cIter = pcmk__xml_next(cIter)) {
accept_attr_deletions(cIter);
}
}
/*!
* \internal
* \brief Find first child XML node matching another given XML node
*
* \param[in] haystack XML whose children should be checked
* \param[in] needle XML to match (comment content or element name and ID)
* \param[in] exact If true and needle is a comment, position must match
*/
xmlNode *
pcmk__xml_match(xmlNode *haystack, xmlNode *needle, bool exact)
{
CRM_CHECK(needle != NULL, return NULL);
if (needle->type == XML_COMMENT_NODE) {
return pcmk__xc_match(haystack, needle, exact);
} else {
const char *id = ID(needle);
const char *attr = (id == NULL)? NULL : XML_ATTR_ID;
return pcmk__xe_match(haystack, crm_element_name(needle), attr, id);
}
}
void
xml_log_changes(uint8_t log_level, const char *function, xmlNode * xml)
{
GList *gIter = NULL;
xml_private_t *doc = NULL;
if (log_level == LOG_NEVER) {
return;
}
CRM_ASSERT(xml);
CRM_ASSERT(xml->doc);
doc = xml->doc->_private;
if (!pcmk_is_set(doc->flags, pcmk__xf_dirty)) {
return;
}
for(gIter = doc->deleted_objs; gIter; gIter = gIter->next) {
pcmk__deleted_xml_t *deleted_obj = gIter->data;
if (deleted_obj->position >= 0) {
do_crm_log_alias(log_level, __FILE__, function, __LINE__, "-- %s (%d)",
deleted_obj->path, deleted_obj->position);
} else {
do_crm_log_alias(log_level, __FILE__, function, __LINE__, "-- %s",
deleted_obj->path);
}
}
log_data_element(log_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);
reset_xml_private_data(xml->doc->_private);
if (!pcmk_is_set(doc->flags, pcmk__xf_dirty)) {
doc->flags = pcmk__xf_none;
return;
}
doc->flags = pcmk__xf_none;
accept_attr_deletions(top);
}
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 = pcmk__xml_first_child(root); a_child != NULL;
a_child = pcmk__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;
}
#define attr_matches(c, n, v) pcmk__str_eq(crm_element_value((c), (n)), \
(v), pcmk__str_none)
/*!
* \internal
* \brief Find first XML child element matching given criteria
*
* \param[in] parent XML element to search
* \param[in] node_name If not NULL, only match children of this type
* \param[in] attr_n If not NULL, only match children with an attribute
* of this name and a value of \p attr_v
* \param[in] attr_v If \p attr_n and this are not NULL, only match children
* with an attribute named \p attr_n and this value
*
* \return Matching XML child element, or NULL if none found
*/
xmlNode *
pcmk__xe_match(xmlNode *parent, const char *node_name,
const char *attr_n, const char *attr_v)
{
/* ensure attr_v specified when attr_n is */
CRM_CHECK(attr_n == NULL || attr_v != NULL, return NULL);
for (xmlNode *child = pcmk__xml_first_child(parent); child != NULL;
child = pcmk__xml_next(child)) {
if (pcmk__str_eq(node_name, (const char *) (child->name),
pcmk__str_null_matches)
&& ((attr_n == NULL) || attr_matches(child, attr_n, attr_v))) {
return child;
}
}
crm_trace("XML child node <%s%s%s%s%s> not found in %s",
(node_name? node_name : "(any)"),
(attr_n? " " : ""),
(attr_n? attr_n : ""),
(attr_n? "=" : ""),
(attr_n? attr_v : ""),
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 {
for (xmlAttrPtr a = pcmk__xe_first_attr(src); a != NULL; a = a->next) {
const char *p_name = (const char *) a->name;
const char *p_value = pcmk__xml_attr_value(a);
expand_plus_plus(target, p_name, p_value);
if (xml_acl_denied(target)) {
crm_trace("Cannot copy %s=%s to %s", p_name, p_value, target->name);
return;
}
}
}
return;
}
+/*!
+ * \brief Parse integer assignment statements on this node and all its child
+ * nodes
+ *
+ * \param[in] target root XML node to be processed
+ *
+ * \note This function is recursive
+ */
void
fix_plus_plus_recursive(xmlNode * target)
{
/* TODO: Remove recursion and use xpath searches for value++ */
xmlNode *child = NULL;
for (xmlAttrPtr a = pcmk__xe_first_attr(target); a != NULL; a = a->next) {
const char *p_name = (const char *) a->name;
const char *p_value = pcmk__xml_attr_value(a);
expand_plus_plus(target, p_name, p_value);
}
for (child = pcmk__xml_first_child(target); child != NULL;
child = pcmk__xml_next(child)) {
fix_plus_plus_recursive(child);
}
}
+/*!
+ * \brief Parse integer assignment statement and update current XML attribute
+ * value
+ *
+ * \param[in] target XML node to be processed
+ * \param[in] name name of the variable to change, e.g. value
+ * \param[in] value assignment statement to apply, e.g. "value++" or
+ * "value+=5"
+ */
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 = (int)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;
}
/*!
* \internal
* \brief Remove an XML element's attributes that match some criteria
*
* \param[in,out] element XML element to modify
* \param[in] match If not NULL, only remove attributes for which
* this function returns true
* \param[in] user_data Data to pass to \p match
*/
void
pcmk__xe_remove_matching_attrs(xmlNode *element,
bool (*match)(xmlAttrPtr, void *),
void *user_data)
{
xmlAttrPtr next = NULL;
for (xmlAttrPtr a = pcmk__xe_first_attr(element); a != NULL; a = next) {
next = a->next; // Grab now because attribute might get removed
if ((match == NULL) || match(a, user_data)) {
if (!pcmk__check_acl(element, NULL, pcmk__xf_acl_write)) {
crm_trace("ACLs prevent removal of attributes (%s and "
"possibly others) from %s element",
(const char *) a->name, (const char *) element->name);
return; // ACLs apply to element, not particular attributes
}
if (pcmk__tracking_xml_changes(element, false)) {
// Leave (marked for removal) until after diff is calculated
set_parent_flag(element, pcmk__xf_dirty);
pcmk__set_xml_flags((xml_private_t *) a->_private,
pcmk__xf_deleted);
} else {
xmlRemoveProp(a);
}
}
}
}
xmlDoc *
getDocPtr(xmlNode * node)
{
xmlDoc *doc = NULL;
CRM_CHECK(node != NULL, return NULL);
doc = node->doc;
if (doc == NULL) {
doc = xmlNewDoc((pcmkXmlStr) "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);
pcmk__mark_xml_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;
}
xmlNode *
create_xml_node(xmlNode * parent, const char *name)
{
xmlDoc *doc = NULL;
xmlNode *node = NULL;
if (pcmk__str_empty(name)) {
CRM_CHECK(name != NULL && name[0] == 0, return NULL);
return NULL;
}
if (parent == NULL) {
doc = xmlNewDoc((pcmkXmlStr) "1.0");
node = xmlNewDocRawNode(doc, NULL, (pcmkXmlStr) name, NULL);
xmlDocSetRootElement(doc, node);
} else {
doc = getDocPtr(parent);
node = xmlNewDocRawNode(doc, NULL, (pcmkXmlStr) name, NULL);
xmlAddChild(parent, node);
}
pcmk__mark_xml_created(node);
return node;
}
xmlNode *
pcmk_create_xml_text_node(xmlNode * parent, const char *name, const char *content)
{
xmlNode *node = create_xml_node(parent, name);
if (node != NULL) {
xmlNodeSetContent(node, (pcmkXmlStr) content);
}
return node;
}
xmlNode *
pcmk_create_html_node(xmlNode * parent, const char *element_name, const char *id,
const char *class_name, const char *text)
{
xmlNode *node = pcmk_create_xml_text_node(parent, element_name, text);
if (class_name != NULL) {
crm_xml_add(node, "class", class_name);
}
if (id != NULL) {
crm_xml_add(node, "id", id);
}
return node;
}
/*!
* Free an XML element and all of its children, removing it from its parent
*
* \param[in] xml XML element to free
*/
void
pcmk_free_xml_subtree(xmlNode *xml)
{
xmlUnlinkNode(xml); // Detaches from parent and siblings
xmlFreeNode(xml); // Frees
}
static void
free_xml_with_position(xmlNode * child, int position)
{
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 (pcmk__check_acl(child, NULL, pcmk__xf_acl_write) == FALSE) {
int offset = 0;
char buffer[PCMK__BUFFER_SIZE];
pcmk__element_xpath(NULL, child, buffer, offset, sizeof(buffer));
crm_trace("Cannot remove %s %x", buffer, p->flags);
return;
} else {
if (doc && pcmk__tracking_xml_changes(child, FALSE)
&& !pcmk_is_set(p->flags, pcmk__xf_created)) {
int offset = 0;
char buffer[PCMK__BUFFER_SIZE];
if (pcmk__element_xpath(NULL, child, buffer, offset,
sizeof(buffer)) > 0) {
pcmk__deleted_xml_t *deleted_obj = NULL;
crm_trace("Deleting %s %p from %p", buffer, child, doc);
deleted_obj = calloc(1, sizeof(pcmk__deleted_xml_t));
deleted_obj->path = strdup(buffer);
deleted_obj->position = -1;
/* Record the "position" only for XML comments for now */
if (child->type == XML_COMMENT_NODE) {
if (position >= 0) {
deleted_obj->position = position;
} else {
deleted_obj->position = pcmk__xml_position(child,
pcmk__xf_skip);
}
}
p = doc->_private;
p->deleted_objs = g_list_append(p->deleted_objs, deleted_obj);
pcmk__set_xml_doc_flag(child, pcmk__xf_dirty);
}
}
pcmk_free_xml_subtree(child);
}
}
}
void
free_xml(xmlNode * child)
{
free_xml_with_position(child, -1);
}
xmlNode *
copy_xml(xmlNode * src)
{
xmlDoc *doc = xmlNewDoc((pcmkXmlStr) "1.0");
xmlNode *copy = xmlDocCopyNode(src, doc, 1);
xmlDocSetRootElement(doc, copy);
xmlSetTreeDoc(copy, doc);
return copy;
}
static void
log_xmllib_err(void *ctx, const char *fmt, ...)
G_GNUC_PRINTF(2, 3);
// Log an XML library error
static void
log_xmllib_err(void *ctx, const char *fmt, ...)
{
va_list ap;
static struct qb_log_callsite *xml_error_cs = NULL;
if (xml_error_cs == NULL) {
xml_error_cs = qb_log_callsite_get(
__func__, __FILE__, "xml library error", LOG_TRACE, __LINE__, crm_trace_nonlog);
}
va_start(ap, fmt);
if (xml_error_cs && xml_error_cs->targets) {
PCMK__XML_LOG_BASE(LOG_ERR, TRUE,
crm_abort(__FILE__, __PRETTY_FUNCTION__, __LINE__, "xml library error",
TRUE, TRUE),
"XML Error: ", fmt, ap);
} else {
PCMK__XML_LOG_BASE(LOG_ERR, TRUE, 0, "XML Error: ", fmt, ap);
}
va_end(ap);
}
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);
xmlCtxtResetLastError(ctxt);
xmlSetGenericErrorFunc(ctxt, log_xmllib_err);
output = xmlCtxtReadDoc(ctxt, (pcmkXmlStr) input, NULL, NULL,
PCMK__XML_PARSE_OPTS);
if (output) {
xml = xmlDocGetRootElement(output);
}
last_error = xmlCtxtGetLastError(ctxt);
if (last_error && last_error->code != XML_ERR_OK) {
/* crm_abort(__FILE__,__func__,__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_LOG_ASSERT("Cannot parse an empty string");
} 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_LOG_ASSERT("String parsing error");
}
}
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 {
xml_buffer = pcmk__realloc(xml_buffer, data_length + PCMK__BUFFER_SIZE);
read_chars = fread(xml_buffer + data_length, 1, PCMK__BUFFER_SIZE,
stdin);
data_length += read_chars;
} while (read_chars == PCMK__BUFFER_SIZE);
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;
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) {
crm_err("Could not prepare to read compressed %s: %s "
CRM_XS " bzerror=%d", filename, bz2_strerror(rc), rc);
BZ2_bzReadClose(&rc, bz_file);
fclose(input);
return NULL;
}
rc = BZ_OK;
// cppcheck seems not to understand the abort-logic in pcmk__realloc
// cppcheck-suppress memleak
while (rc == BZ_OK) {
buffer = pcmk__realloc(buffer, PCMK__BUFFER_SIZE + length + 1);
read_len = BZ2_bzRead(&rc, bz_file, buffer + length, PCMK__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';
if (rc != BZ_STREAM_END) {
crm_err("Could not read compressed %s: %s "
CRM_XS " bzerror=%d", filename, bz2_strerror(rc), rc);
free(buffer);
buffer = NULL;
}
BZ2_bzReadClose(&rc, bz_file);
fclose(input);
return buffer;
}
/*!
* \internal
* \brief Remove XML text nodes from specified XML and all its children
*
* \param[in,out] xml XML to strip text from
*/
void
pcmk__strip_xml_text(xmlNode *xml)
{
xmlNode *iter = xml->children;
while (iter) {
xmlNode *next = iter->next;
switch (iter->type) {
case XML_TEXT_NODE:
/* Remove it */
pcmk_free_xml_subtree(iter);
break;
case XML_ELEMENT_NODE:
/* Search it */
pcmk__strip_xml_text(iter);
break;
default:
/* Leave it */
break;
}
iter = next;
}
}
xmlNode *
filename2xml(const char *filename)
{
xmlNode *xml = NULL;
xmlDocPtr output = NULL;
bool uncompressed = true;
xmlParserCtxtPtr ctxt = NULL;
xmlErrorPtr last_error = NULL;
/* create a parser context */
ctxt = xmlNewParserCtxt();
CRM_CHECK(ctxt != NULL, return NULL);
xmlCtxtResetLastError(ctxt);
xmlSetGenericErrorFunc(ctxt, log_xmllib_err);
if (filename) {
uncompressed = !pcmk__ends_with_ext(filename, ".bz2");
}
if (pcmk__str_eq(filename, "-", pcmk__str_null_matches)) {
/* STDIN_FILENO == fileno(stdin) */
output = xmlCtxtReadFd(ctxt, STDIN_FILENO, "unknown.xml", NULL,
PCMK__XML_PARSE_OPTS);
} else if (uncompressed) {
output = xmlCtxtReadFile(ctxt, filename, NULL, PCMK__XML_PARSE_OPTS);
} else {
char *input = decompress_file(filename);
output = xmlCtxtReadDoc(ctxt, (pcmkXmlStr) input, NULL, NULL,
PCMK__XML_PARSE_OPTS);
free(input);
}
if (output && (xml = xmlDocGetRootElement(output))) {
pcmk__strip_xml_text(xml);
}
last_error = xmlCtxtGetLastError(ctxt);
if (last_error && last_error->code != XML_ERR_OK) {
/* crm_abort(__FILE__,__func__,__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;
}
/*!
* \internal
* \brief Add a "last written" attribute to an XML element, set to current time
*
* \param[in] xe XML element to add attribute to
*
* \return Value that was set, or NULL on error
*/
const char *
pcmk__xe_add_last_written(xmlNode *xe)
{
const char *now_str = pcmk__epoch2str(NULL);
return crm_xml_add(xe, XML_CIB_ATTR_WRITTEN,
now_str ? now_str : "Could not determine current time");
}
/*!
* \brief Sanitize a string so it is usable as an XML ID
*
* \param[in,out] id String to sanitize
*/
void
crm_xml_sanitize_id(char *id)
{
char *c;
for (c = id; *c; ++c) {
/* @TODO Sanitize more comprehensively */
switch (*c) {
case ':':
case '#':
*c = '.';
}
}
}
/*!
* \brief Set the ID of an XML element using a format
*
* \param[in,out] xml XML element
* \param[in] fmt printf-style format
* \param[in] ... any arguments required by format
*/
void
crm_xml_set_id(xmlNode *xml, const char *format, ...)
{
va_list ap;
int len = 0;
char *id = NULL;
/* equivalent to crm_strdup_printf() */
va_start(ap, format);
len = vasprintf(&id, format, ap);
va_end(ap);
CRM_ASSERT(len > 0);
crm_xml_sanitize_id(id);
crm_xml_add(xml, XML_ATTR_ID, id);
free(id);
}
/*!
* \internal
* \brief Write XML to a file stream
*
* \param[in] xml_node XML to write
* \param[in] filename Name of file being written (for logging only)
* \param[in] stream Open file stream corresponding to filename
* \param[in] compress Whether to compress XML before writing
* \param[out] nbytes Number of bytes written
*
* \return Standard Pacemaker return code
*/
static int
write_xml_stream(xmlNode *xml_node, const char *filename, FILE *stream,
bool compress, unsigned int *nbytes)
{
int rc = pcmk_rc_ok;
char *buffer = NULL;
*nbytes = 0;
crm_log_xml_trace(xml_node, "writing");
buffer = dump_xml_formatted(xml_node);
CRM_CHECK(buffer && strlen(buffer),
crm_log_xml_warn(xml_node, "formatting failed");
rc = pcmk_rc_error;
goto bail);
if (compress) {
unsigned int in = 0;
BZFILE *bz_file = NULL;
rc = BZ_OK;
bz_file = BZ2_bzWriteOpen(&rc, stream, 5, 0, 30);
if (rc != BZ_OK) {
crm_warn("Not compressing %s: could not prepare file stream: %s "
CRM_XS " bzerror=%d", filename, bz2_strerror(rc), rc);
} else {
BZ2_bzWrite(&rc, bz_file, buffer, strlen(buffer));
if (rc != BZ_OK) {
crm_warn("Not compressing %s: could not compress data: %s "
CRM_XS " bzerror=%d errno=%d",
filename, bz2_strerror(rc), rc, errno);
}
}
if (rc == BZ_OK) {
BZ2_bzWriteClose(&rc, bz_file, 0, &in, nbytes);
if (rc != BZ_OK) {
crm_warn("Not compressing %s: could not write compressed data: %s "
CRM_XS " bzerror=%d errno=%d",
filename, bz2_strerror(rc), rc, errno);
*nbytes = 0; // retry without compression
} else {
crm_trace("Compressed XML for %s from %u bytes to %u",
filename, in, *nbytes);
}
}
rc = pcmk_rc_ok; // Either true, or we'll retry without compression
}
if (*nbytes == 0) {
rc = fprintf(stream, "%s", buffer);
if (rc < 0) {
rc = errno;
crm_perror(LOG_ERR, "writing %s", filename);
} else {
*nbytes = (unsigned int) rc;
rc = pcmk_rc_ok;
}
}
bail:
if (fflush(stream) != 0) {
rc = errno;
crm_perror(LOG_ERR, "flushing %s", filename);
}
/* Don't report error if the file does not support synchronization */
if (fsync(fileno(stream)) < 0 && errno != EROFS && errno != EINVAL) {
rc = errno;
crm_perror(LOG_ERR, "synchronizing %s", filename);
}
fclose(stream);
crm_trace("Saved %d bytes to %s as XML", *nbytes, filename);
free(buffer);
return rc;
}
/*!
* \brief Write XML to a file descriptor
*
* \param[in] xml_node XML to write
* \param[in] filename Name of file being written (for logging only)
* \param[in] fd Open file descriptor corresponding to filename
* \param[in] compress Whether to compress XML before writing
*
* \return Number of bytes written on success, -errno otherwise
*/
int
write_xml_fd(xmlNode * xml_node, const char *filename, int fd, gboolean compress)
{
FILE *stream = NULL;
unsigned int nbytes = 0;
int rc = pcmk_rc_ok;
CRM_CHECK(xml_node && (fd > 0), return -EINVAL);
stream = fdopen(fd, "w");
if (stream == NULL) {
return -errno;
}
rc = write_xml_stream(xml_node, filename, stream, compress, &nbytes);
if (rc != pcmk_rc_ok) {
return pcmk_rc2legacy(rc);
}
return (int) nbytes;
}
/*!
* \brief Write XML to a file
*
* \param[in] xml_node XML to write
* \param[in] filename Name of file to write
* \param[in] compress Whether to compress XML before writing
*
* \return Number of bytes written on success, -errno otherwise
*/
int
write_xml_file(xmlNode * xml_node, const char *filename, gboolean compress)
{
FILE *stream = NULL;
unsigned int nbytes = 0;
int rc = pcmk_rc_ok;
CRM_CHECK(xml_node && filename, return -EINVAL);
stream = fopen(filename, "w");
if (stream == NULL) {
return -errno;
}
rc = write_xml_stream(xml_node, filename, stream, compress, &nbytes);
if (rc != pcmk_rc_ok) {
return pcmk_rc2legacy(rc);
}
return (int) nbytes;
}
// Replace a portion of a dynamically allocated string (reallocating memory)
static char *
replace_text(char *text, int start, size_t *length, const char *replace)
{
size_t offset = strlen(replace) - 1; // We have space for 1 char already
*length += offset;
text = pcmk__realloc(text, *length);
for (size_t lpc = (*length) - 1; lpc > (start + offset); lpc--) {
text[lpc] = text[lpc - offset];
}
memcpy(text + start, replace, offset + 1);
return text;
}
/*!
* \brief Replace special characters with their XML escape sequences
*
* \param[in] text Text to escape
*
* \return Newly allocated string equivalent to \p text but with special
* characters replaced with XML escape sequences (or NULL if \p text
* is NULL)
*/
char *
crm_xml_escape(const char *text)
{
size_t length;
char *copy;
/*
* When xmlCtxtReadDoc() parses &lt; 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 escaping in our custom
* version so that the result can be re-parsed by xmlCtxtReadDoc()
* when necessary.
*/
if (text == NULL) {
return NULL;
}
length = 1 + strlen(text);
copy = strdup(text);
CRM_ASSERT(copy != NULL);
for (size_t index = 0; index < length; index++) {
if(copy[index] & 0x80 && copy[index+1] & 0x80){
index++;
break;
}
switch (copy[index]) {
case 0:
break;
case '<':
copy = replace_text(copy, index, &length, "&lt;");
break;
case '>':
copy = replace_text(copy, index, &length, "&gt;");
break;
case '"':
copy = replace_text(copy, index, &length, "&quot;");
break;
case '\'':
copy = replace_text(copy, index, &length, "&apos;");
break;
case '&':
copy = replace_text(copy, index, &length, "&amp;");
break;
case '\t':
/* Might as well just expand to a few spaces... */
copy = replace_text(copy, index, &length, " ");
break;
case '\n':
copy = replace_text(copy, index, &length, "\\n");
break;
case '\r':
copy = replace_text(copy, index, &length, "\\r");
break;
default:
/* Check for and replace non-printing characters with their octal equivalent */
if(copy[index] < ' ' || copy[index] > '~') {
char *replace = crm_strdup_printf("\\%.3o", copy[index]);
copy = replace_text(copy, index, &length, replace);
free(replace);
}
}
}
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;
xml_private_t *p = NULL;
CRM_ASSERT(buffer != NULL);
if (attr == NULL || attr->children == NULL) {
return;
}
p = attr->_private;
if (p && pcmk_is_set(p->flags, pcmk__xf_deleted)) {
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, pcmk__s(p_value, "<null>"));
free(p_value);
}
// Log an XML element (and any children) in a formatted way
void
pcmk__xe_log(int log_level, const char *file, const char *function, int line,
const char *prefix, xmlNode *data, int depth, int options)
{
int max = 0;
int offset = 0;
const char *name = NULL;
const char *hidden = NULL;
xmlNode *child = NULL;
if ((data == NULL) || (log_level == LOG_NEVER)) {
return;
}
name = crm_element_name(data);
if (pcmk_is_set(options, xml_log_option_open)) {
char *buffer = NULL;
insert_prefix(options, &buffer, &offset, &max, depth);
if (data->type == XML_COMMENT_NODE) {
buffer_print(buffer, max, offset, "<!--%s-->", data->content);
} else {
buffer_print(buffer, max, offset, "<%s", name);
hidden = crm_element_value(data, "hidden");
for (xmlAttrPtr a = pcmk__xe_first_attr(data); a != NULL;
a = a->next) {
xml_private_t *p = a->_private;
const char *p_name = (const char *) a->name;
const char *p_value = pcmk__xml_attr_value(a);
char *p_copy = NULL;
if (pcmk_is_set(p->flags, pcmk__xf_deleted)) {
continue;
} else if (pcmk_any_flags_set(options,
xml_log_option_diff_plus
|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, pcmk__s(p_copy, "<null>"));
free(p_copy);
}
if(xml_has_children(data) == FALSE) {
buffer_print(buffer, max, offset, "/>");
} else if (pcmk_is_set(options, xml_log_option_children)) {
buffer_print(buffer, max, offset, ">");
} else {
buffer_print(buffer, max, offset, "/>");
}
}
do_crm_log_alias(log_level, file, function, line, "%s %s", prefix, buffer);
free(buffer);
}
if(data->type == XML_COMMENT_NODE) {
return;
} else if(xml_has_children(data) == FALSE) {
return;
} else if (pcmk_is_set(options, xml_log_option_children)) {
offset = 0;
max = 0;
for (child = pcmk__xml_first_child(data); child != NULL;
child = pcmk__xml_next(child)) {
pcmk__xe_log(log_level, file, function, line, prefix, child,
depth + 1,
options|xml_log_option_open|xml_log_option_close);
}
}
if (pcmk_is_set(options, xml_log_option_close)) {
char *buffer = NULL;
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(buffer);
}
}
// Log XML portions that have been marked as changed
static void
log_xml_changes(int log_level, const char *file, const char *function, int line,
const char *prefix, xmlNode *data, int depth, int options)
{
xml_private_t *p;
char *prefix_m = NULL;
xmlNode *child = NULL;
if ((data == NULL) || (log_level == LOG_NEVER)) {
return;
}
p = data->_private;
prefix_m = strdup(prefix);
prefix_m[1] = '+';
if (pcmk_all_flags_set(p->flags, pcmk__xf_dirty|pcmk__xf_created)) {
/* Continue and log full subtree */
pcmk__xe_log(log_level, file, function, line, prefix_m, data, depth,
options|xml_log_option_open|xml_log_option_close
|xml_log_option_children);
} else if (pcmk_is_set(p->flags, pcmk__xf_dirty)) {
char *spaces = calloc(80, 1);
int s_count = 0, s_max = 80;
char *prefix_del = NULL;
char *prefix_moved = NULL;
const char *flags = prefix;
insert_prefix(options, &spaces, &s_count, &s_max, depth);
prefix_del = strdup(prefix);
prefix_del[0] = '-';
prefix_del[1] = '-';
prefix_moved = strdup(prefix);
prefix_moved[1] = '~';
if (pcmk_is_set(p->flags, pcmk__xf_moved)) {
flags = prefix_moved;
} else {
flags = prefix;
}
pcmk__xe_log(log_level, file, function, line, flags, data, depth,
options|xml_log_option_open);
for (xmlAttrPtr a = pcmk__xe_first_attr(data); a != NULL; a = a->next) {
const char *aname = (const char*) a->name;
p = a->_private;
if (pcmk_is_set(p->flags, pcmk__xf_deleted)) {
const char *value = crm_element_value(data, aname);
flags = prefix_del;
do_crm_log_alias(log_level, file, function, line,
"%s %s @%s=%s", flags, spaces, aname, value);
} else if (pcmk_is_set(p->flags, pcmk__xf_dirty)) {
const char *value = crm_element_value(data, aname);
if (pcmk_is_set(p->flags, pcmk__xf_created)) {
flags = prefix_m;
} else if (pcmk_is_set(p->flags, pcmk__xf_modified)) {
flags = prefix;
} else if (pcmk_is_set(p->flags, pcmk__xf_moved)) {
flags = prefix_moved;
} else {
flags = prefix;
}
do_crm_log_alias(log_level, file, function, line,
"%s %s @%s=%s", flags, spaces, aname, value);
}
}
free(prefix_moved);
free(prefix_del);
free(spaces);
for (child = pcmk__xml_first_child(data); child != NULL;
child = pcmk__xml_next(child)) {
log_xml_changes(log_level, file, function, line, prefix, child,
depth + 1, options);
}
pcmk__xe_log(log_level, file, function, line, prefix, data, depth,
options|xml_log_option_close);
} else {
for (child = pcmk__xml_first_child(data); child != NULL;
child = pcmk__xml_next(child)) {
log_xml_changes(log_level, file, function, line, prefix, child,
depth + 1, options);
}
}
free(prefix_m);
}
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;
char *prefix_m = NULL;
if (log_level == LOG_NEVER) {
return;
}
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;
}
if (pcmk_is_set(options, xml_log_option_dirty_add)) {
log_xml_changes(log_level, file, function, line, prefix, data, depth,
options);
return;
}
if (pcmk_is_set(options, xml_log_option_formatted)) {
if (pcmk_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 (pcmk_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 (pcmk_is_set(options, xml_log_option_diff_short)
&& !pcmk_is_set(options, xml_log_option_diff_all)) {
/* Still searching for the actual change */
for (a_child = pcmk__xml_first_child(data); a_child != NULL;
a_child = pcmk__xml_next(a_child)) {
log_data_element(log_level, file, function, line, prefix, a_child, depth + 1, options);
}
} else {
pcmk__xe_log(log_level, file, function, line, prefix, data, depth,
options|xml_log_option_open|xml_log_option_close
|xml_log_option_children);
}
free(prefix_m);
}
static void
dump_filtered_xml(xmlNode * data, int options, char **buffer, int *offset, int *max)
{
for (xmlAttrPtr a = pcmk__xe_first_attr(data); a != NULL; a = a->next) {
if (!pcmk__xa_filterable((const char *) (a->name))) {
dump_xml_attr(a, options, buffer, offset, max);
}
}
}
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 {
for (xmlAttrPtr a = pcmk__xe_first_attr(data); a != NULL; a = a->next) {
dump_xml_attr(a, 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 = data->children; xChild != NULL; xChild = xChild->next) {
pcmk__xml2text(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_text(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, "%s", data->content);
if (options & xml_log_option_formatted) {
buffer_print(*buffer, *max, *offset, "\n");
}
}
static void
dump_xml_cdata(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, "<![CDATA[");
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_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");
}
}
#define PCMK__XMLDUMP_STATS 0
/*!
* \internal
* \brief Create a text representation of an XML object
*
* \param[in] data XML to convert
* \param[in] options Group of enum xml_log_options flags
* \param[in,out] buffer Buffer to store text in (may be reallocated)
* \param[in,out] offset Current position of null terminator within \p buffer
* \param[in,out] max Current size of \p buffer in bytes
* \param[in] depth Current indentation level
*/
void
pcmk__xml2text(xmlNode *data, int options, char **buffer, int *offset,
int *max, int depth)
{
if(data == NULL) {
*offset = 0;
*max = 0;
return;
}
if (!pcmk_is_set(options, xml_log_option_filtered)
&& pcmk_is_set(options, xml_log_option_full_fledged)) {
/* libxml's serialization reuse is a good idea, sadly we cannot
apply it for the filtered cases (preceding filtering pass
would preclude further reuse of such in-situ modified XML
in generic context and is likely not a win performance-wise),
and there's also a historically unstable throughput argument
(likely stemming from memory allocation overhead, eventhough
that shall be minimized with defaults preset in crm_xml_init) */
#if (PCMK__XMLDUMP_STATS - 0)
time_t next, new = time(NULL);
#endif
xmlDoc *doc;
xmlOutputBuffer *xml_buffer;
doc = getDocPtr(data);
/* doc will only be NULL if data is */
CRM_CHECK(doc != NULL, return);
xml_buffer = xmlAllocOutputBuffer(NULL);
CRM_ASSERT(xml_buffer != NULL);
/* XXX we could setup custom allocation scheme for the particular
buffer, but it's subsumed with crm_xml_init that needs to
be invoked prior to entering this function as such, since
its other branch vitally depends on it -- what can be done
about this all is to have a facade parsing functions that
would 100% mark entering libxml code for us, since we don't
do anything as crazy as swapping out the binary form of the
parsed tree (but those would need to be strictly used as
opposed to libxml's raw functions) */
xmlNodeDumpOutput(xml_buffer, doc, data, 0,
(options & xml_log_option_formatted), NULL);
/* attempt adding final NL - failing shouldn't be fatal here */
(void) xmlOutputBufferWrite(xml_buffer, sizeof("\n") - 1, "\n");
if (xml_buffer->buffer != NULL) {
buffer_print(*buffer, *max, *offset, "%s",
(char *) xmlBufContent(xml_buffer->buffer));
}
#if (PCMK__XMLDUMP_STATS - 0)
next = time(NULL);
if ((now + 1) < next) {
crm_log_xml_trace(data, "Long time");
crm_err("xmlNodeDump() -> %dbytes took %ds", *max, next - now);
}
#endif
/* asserted allocation before so there should be something to remove */
(void) xmlOutputBufferClose(xml_buffer);
return;
}
switch(data->type) {
case XML_ELEMENT_NODE:
/* Handle below */
dump_xml_element(data, options, buffer, offset, max, depth);
break;
case XML_TEXT_NODE:
/* if option xml_log_option_text is enabled, then dump XML_TEXT_NODE */
if (options & xml_log_option_text) {
dump_xml_text(data, options, buffer, offset, max, depth);
}
return;
case XML_COMMENT_NODE:
dump_xml_comment(data, options, buffer, offset, max, depth);
break;
case XML_CDATA_SECTION_NODE:
dump_xml_cdata(data, options, buffer, offset, max, depth);
break;
default:
crm_warn("Unhandled type: %d", data->type);
return;
/*
XML_ATTRIBUTE_NODE = 2
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
*/
}
}
/*!
* \internal
* \brief Add a single character to a dynamically allocated buffer
*
* \param[in,out] buffer Buffer to store text in (may be reallocated)
* \param[in,out] offset Current position of null terminator within \p buffer
* \param[in,out] max Current size of \p buffer in bytes
* \param[in] c Character to add to \p buffer
*/
void
pcmk__buffer_add_char(char **buffer, int *offset, int *max, char c)
{
buffer_print(*buffer, *max, *offset, "%c", c);
}
char *
dump_xml_formatted_with_text(xmlNode * an_xml_node)
{
char *buffer = NULL;
int offset = 0, max = 0;
pcmk__xml2text(an_xml_node,
xml_log_option_formatted|xml_log_option_full_fledged,
&buffer, &offset, &max, 0);
return buffer;
}
char *
dump_xml_formatted(xmlNode * an_xml_node)
{
char *buffer = NULL;
int offset = 0, max = 0;
pcmk__xml2text(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;
pcmk__xml2text(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;
}
void
xml_remove_prop(xmlNode * obj, const char *name)
{
if (pcmk__check_acl(obj, NULL, pcmk__xf_acl_write) == FALSE) {
crm_trace("Cannot remove %s from %s", name, obj->name);
} else if (pcmk__tracking_xml_changes(obj, FALSE)) {
/* Leave in place (marked for removal) until after the diff is calculated */
xml_private_t *p = NULL;
xmlAttr *attr = xmlHasProp(obj, (pcmkXmlStr) name);
p = attr->_private;
set_parent_flag(obj, pcmk__xf_dirty);
pcmk__set_xml_flags(p, pcmk__xf_deleted);
} else {
xmlUnsetProp(obj, (pcmkXmlStr) name);
}
}
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 = crm_strdup_printf("%s/%s", pcmk__get_tmpdir(), uuid);
filename = f;
free(uuid);
}
crm_info("Saving %s to %s", desc, filename);
write_xml_file(xml, filename, FALSE);
free(f);
}
/*!
* \internal
* \brief Set a flag on all attributes of an XML element
*
* \param[in,out] xml XML node to set flags on
* \param[in] flag XML private flag to set
*/
static void
set_attrs_flag(xmlNode *xml, enum xml_private_flags flag)
{
for (xmlAttr *attr = pcmk__xe_first_attr(xml); attr; attr = attr->next) {
pcmk__set_xml_flags((xml_private_t *) (attr->_private), flag);
}
}
/*!
* \internal
* \brief Add an XML attribute to a node, marked as deleted
*
* When calculating XML changes, we need to know when an attribute has been
* deleted. Add the attribute back to the new XML, so that we can check the
* removal against ACLs, and mark it as deleted for later removal after
* differences have been calculated.
*/
static void
mark_attr_deleted(xmlNode *new_xml, const char *element, const char *attr_name,
const char *old_value)
{
xml_private_t *p = new_xml->doc->_private;
xmlAttr *attr = NULL;
// Prevent the dirty flag being set recursively upwards
pcmk__clear_xml_flags(p, pcmk__xf_tracking);
// Restore the old value (and the tracking flag)
attr = xmlSetProp(new_xml, (pcmkXmlStr) attr_name, (pcmkXmlStr) old_value);
pcmk__set_xml_flags(p, pcmk__xf_tracking);
// Reset flags (so the attribute doesn't appear as newly created)
p = attr->_private;
p->flags = 0;
// Check ACLs and mark restored value for later removal
xml_remove_prop(new_xml, attr_name);
crm_trace("XML attribute %s=%s was removed from %s",
attr_name, old_value, element);
}
/*
* \internal
* \brief Check ACLs for a changed XML attribute
*/
static void
mark_attr_changed(xmlNode *new_xml, const char *element, const char *attr_name,
const char *old_value)
{
char *vcopy = crm_element_value_copy(new_xml, attr_name);
crm_trace("XML attribute %s was changed from '%s' to '%s' in %s",
attr_name, old_value, vcopy, element);
// Restore the original value
xmlSetProp(new_xml, (pcmkXmlStr) attr_name, (pcmkXmlStr) old_value);
// Change it back to the new value, to check ACLs
crm_xml_add(new_xml, attr_name, vcopy);
free(vcopy);
}
/*!
* \internal
* \brief Mark an XML attribute as having changed position
*/
static void
mark_attr_moved(xmlNode *new_xml, const char *element, xmlAttr *old_attr,
xmlAttr *new_attr, int p_old, int p_new)
{
xml_private_t *p = new_attr->_private;
crm_trace("XML attribute %s moved from position %d to %d in %s",
old_attr->name, p_old, p_new, element);
// Mark document, element, and all element's parents as changed
mark_xml_node_dirty(new_xml);
// Mark attribute as changed
pcmk__set_xml_flags(p, pcmk__xf_dirty|pcmk__xf_moved);
p = (p_old > p_new)? old_attr->_private : new_attr->_private;
pcmk__set_xml_flags(p, pcmk__xf_skip);
}
/*!
* \internal
* \brief Calculate differences in all previously existing XML attributes
*/
static void
xml_diff_old_attrs(xmlNode *old_xml, xmlNode *new_xml)
{
xmlAttr *attr_iter = pcmk__xe_first_attr(old_xml);
while (attr_iter != NULL) {
xmlAttr *old_attr = attr_iter;
xmlAttr *new_attr = xmlHasProp(new_xml, attr_iter->name);
const char *name = (const char *) attr_iter->name;
const char *old_value = crm_element_value(old_xml, name);
attr_iter = attr_iter->next;
if (new_attr == NULL) {
mark_attr_deleted(new_xml, (const char *) old_xml->name, name,
old_value);
} else {
xml_private_t *p = new_attr->_private;
int new_pos = pcmk__xml_position((xmlNode*) new_attr,
pcmk__xf_skip);
int old_pos = pcmk__xml_position((xmlNode*) old_attr,
pcmk__xf_skip);
const char *new_value = crm_element_value(new_xml, name);
// This attribute isn't new
pcmk__clear_xml_flags(p, pcmk__xf_created);
if (strcmp(new_value, old_value) != 0) {
mark_attr_changed(new_xml, (const char *) old_xml->name, name,
old_value);
} else if ((old_pos != new_pos)
&& !pcmk__tracking_xml_changes(new_xml, TRUE)) {
mark_attr_moved(new_xml, (const char *) old_xml->name,
old_attr, new_attr, old_pos, new_pos);
}
}
}
}
/*!
* \internal
* \brief Check all attributes in new XML for creation
*/
static void
mark_created_attrs(xmlNode *new_xml)
{
xmlAttr *attr_iter = pcmk__xe_first_attr(new_xml);
while (attr_iter != NULL) {
xmlAttr *new_attr = attr_iter;
xml_private_t *p = attr_iter->_private;
attr_iter = attr_iter->next;
if (pcmk_is_set(p->flags, pcmk__xf_created)) {
const char *attr_name = (const char *) new_attr->name;
crm_trace("Created new attribute %s=%s in %s",
attr_name, crm_element_value(new_xml, attr_name),
new_xml->name);
/* Check ACLs (we can't use the remove-then-create trick because it
* would modify the attribute position).
*/
if (pcmk__check_acl(new_xml, attr_name, pcmk__xf_acl_write)) {
pcmk__mark_xml_attr_dirty(new_attr);
} else {
// Creation was not allowed, so remove the attribute
xmlUnsetProp(new_xml, new_attr->name);
}
}
}
}
/*!
* \internal
* \brief Calculate differences in attributes between two XML nodes
*/
static void
xml_diff_attrs(xmlNode *old_xml, xmlNode *new_xml)
{
set_attrs_flag(new_xml, pcmk__xf_created); // cleared later if not really new
xml_diff_old_attrs(old_xml, new_xml);
mark_created_attrs(new_xml);
}
/*!
* \internal
* \brief Add an XML child element to a node, marked as deleted
*
* When calculating XML changes, we need to know when a child element has been
* deleted. Add the child back to the new XML, so that we can check the removal
* against ACLs, and mark it as deleted for later removal after differences have
* been calculated.
*/
static void
mark_child_deleted(xmlNode *old_child, xmlNode *new_parent)
{
// Re-create the child element so we can check ACLs
xmlNode *candidate = add_node_copy(new_parent, old_child);
// Clear flags on new child and its children
reset_xml_node_flags(candidate);
// Check whether ACLs allow the deletion
pcmk__apply_acl(xmlDocGetRootElement(candidate->doc));
// Remove the child again (which will track it in document's deleted_objs)
free_xml_with_position(candidate,
pcmk__xml_position(old_child, pcmk__xf_skip));
if (pcmk__xml_match(new_parent, old_child, true) == NULL) {
pcmk__set_xml_flags((xml_private_t *) (old_child->_private),
pcmk__xf_skip);
}
}
static void
mark_child_moved(xmlNode *old_child, xmlNode *new_parent, xmlNode *new_child,
int p_old, int p_new)
{
xml_private_t *p = new_child->_private;
crm_trace("Child element %s with id='%s' moved from position %d to %d under %s",
new_child->name, (ID(new_child)? ID(new_child) : "<no id>"),
p_old, p_new, new_parent->name);
mark_xml_node_dirty(new_parent);
pcmk__set_xml_flags(p, pcmk__xf_moved);
if (p_old > p_new) {
p = old_child->_private;
} else {
p = new_child->_private;
}
pcmk__set_xml_flags(p, pcmk__xf_skip);
}
// Given original and new XML, mark new XML portions that have changed
static void
mark_xml_changes(xmlNode *old_xml, xmlNode *new_xml, bool check_top)
{
xmlNode *cIter = NULL;
xml_private_t *p = NULL;
CRM_CHECK(new_xml != NULL, return);
if (old_xml == NULL) {
pcmk__mark_xml_created(new_xml);
pcmk__apply_creation_acl(new_xml, check_top);
return;
}
p = new_xml->_private;
CRM_CHECK(p != NULL, return);
if(p->flags & pcmk__xf_processed) {
/* Avoid re-comparing nodes */
return;
}
pcmk__set_xml_flags(p, pcmk__xf_processed);
xml_diff_attrs(old_xml, new_xml);
// Check for differences in the original children
for (cIter = pcmk__xml_first_child(old_xml); cIter != NULL; ) {
xmlNode *old_child = cIter;
xmlNode *new_child = pcmk__xml_match(new_xml, cIter, true);
cIter = pcmk__xml_next(cIter);
if(new_child) {
mark_xml_changes(old_child, new_child, TRUE);
} else {
mark_child_deleted(old_child, new_xml);
}
}
// Check for moved or created children
for (cIter = pcmk__xml_first_child(new_xml); cIter != NULL; ) {
xmlNode *new_child = cIter;
xmlNode *old_child = pcmk__xml_match(old_xml, cIter, true);
cIter = pcmk__xml_next(cIter);
if(old_child == NULL) {
// This is a newly created child
p = new_child->_private;
pcmk__set_xml_flags(p, pcmk__xf_skip);
mark_xml_changes(old_child, new_child, TRUE);
} else {
/* Check for movement, we already checked for differences */
int p_new = pcmk__xml_position(new_child, pcmk__xf_skip);
int p_old = pcmk__xml_position(old_child, pcmk__xf_skip);
if(p_old != p_new) {
mark_child_moved(old_child, new_xml, new_child, p_old, p_new);
}
}
}
}
void
xml_calculate_significant_changes(xmlNode *old_xml, xmlNode *new_xml)
{
pcmk__set_xml_doc_flag(new_xml, pcmk__xf_lazy);
xml_calculate_changes(old_xml, new_xml);
}
void
xml_calculate_changes(xmlNode *old_xml, xmlNode *new_xml)
{
CRM_CHECK(pcmk__str_eq(crm_element_name(old_xml), crm_element_name(new_xml), pcmk__str_casei),
return);
CRM_CHECK(pcmk__str_eq(ID(old_xml), ID(new_xml), pcmk__str_casei), return);
if(xml_tracking_changes(new_xml) == FALSE) {
xml_track_changes(new_xml, NULL, NULL, FALSE);
}
mark_xml_changes(old_xml, new_xml, FALSE);
}
gboolean
can_prune_leaf(xmlNode * xml_node)
{
xmlNode *cIter = NULL;
gboolean can_prune = TRUE;
const char *name = crm_element_name(xml_node);
if (pcmk__strcase_any_of(name, XML_TAG_RESOURCE_REF, XML_CIB_TAG_OBJ_REF,
XML_ACL_TAG_ROLE_REF, XML_ACL_TAG_ROLE_REFv1, NULL)) {
return FALSE;
}
for (xmlAttrPtr a = pcmk__xe_first_attr(xml_node); a != NULL; a = a->next) {
const char *p_name = (const char *) a->name;
if (strcmp(p_name, XML_ATTR_ID) == 0) {
continue;
}
can_prune = FALSE;
}
cIter = pcmk__xml_first_child(xml_node);
while (cIter) {
xmlNode *child = cIter;
cIter = pcmk__xml_next(cIter);
if (can_prune_leaf(child)) {
free_xml(child);
} else {
can_prune = FALSE;
}
}
return can_prune;
}
/*!
* \internal
* \brief Find a comment with matching content in specified XML
*
* \param[in] root XML to search
* \param[in] search_comment Comment whose content should be searched for
* \param[in] exact If true, comment must also be at same position
*/
xmlNode *
pcmk__xc_match(xmlNode *root, xmlNode *search_comment, bool exact)
{
xmlNode *a_child = NULL;
int search_offset = pcmk__xml_position(search_comment, pcmk__xf_skip);
CRM_CHECK(search_comment->type == XML_COMMENT_NODE, return NULL);
for (a_child = pcmk__xml_first_child(root); a_child != NULL;
a_child = pcmk__xml_next(a_child)) {
if (exact) {
int offset = pcmk__xml_position(a_child, pcmk__xf_skip);
xml_private_t *p = a_child->_private;
if (offset < search_offset) {
continue;
} else if (offset > search_offset) {
return NULL;
}
if (pcmk_is_set(p->flags, pcmk__xf_skip)) {
continue;
}
}
if (a_child->type == XML_COMMENT_NODE
&& pcmk__str_eq((const char *)a_child->content, (const char *)search_comment->content, pcmk__str_casei)) {
return a_child;
} else if (exact) {
return NULL;
}
}
return NULL;
}
/*!
* \internal
* \brief Make one XML comment match another (in content)
*
* \param[in,out] parent If \p target is NULL and this is not, add or update
* comment child of this XML node that matches \p update
* \param[in,out] target If not NULL, update this XML comment node
* \param[in] update Make comment content match this (must not be NULL)
*
* \note At least one of \parent and \target must be non-NULL
*/
void
pcmk__xc_update(xmlNode *parent, xmlNode *target, xmlNode *update)
{
CRM_CHECK(update != NULL, return);
CRM_CHECK(update->type == XML_COMMENT_NODE, return);
if (target == NULL) {
target = pcmk__xc_match(parent, update, false);
}
if (target == NULL) {
add_node_copy(parent, update);
} else if (!pcmk__str_eq((const char *)target->content, (const char *)update->content, pcmk__str_casei)) {
xmlFree(target->content);
target->content = xmlStrdup(update->content);
}
}
/*!
* \internal
* \brief Make one XML tree match another (in children and attributes)
*
* \param[in,out] parent If \p target is NULL and this is not, add or update
* child of this XML node that matches \p update
* \param[in,out] target If not NULL, update this XML
* \param[in] update Make the desired XML match this (must not be NULL)
* \param[in] as_diff If false, expand "++" when making attributes match
*
* \note At least one of \parent and \target must be non-NULL
*/
void
pcmk__xml_update(xmlNode *parent, xmlNode *target, xmlNode *update,
bool as_diff)
{
xmlNode *a_child = NULL;
const char *object_name = NULL,
*object_href = NULL,
*object_href_val = NULL;
#if XML_PARSER_DEBUG
crm_log_xml_trace(update, "update:");
crm_log_xml_trace(target, "target:");
#endif
CRM_CHECK(update != NULL, return);
if (update->type == XML_COMMENT_NODE) {
pcmk__xc_update(parent, target, update);
return;
}
object_name = crm_element_name(update);
object_href_val = ID(update);
if (object_href_val != NULL) {
object_href = XML_ATTR_ID;
} else {
object_href_val = crm_element_value(update, XML_ATTR_IDREF);
object_href = (object_href_val == NULL) ? NULL : XML_ATTR_IDREF;
}
CRM_CHECK(object_name != NULL, return);
CRM_CHECK(target != NULL || parent != NULL, return);
if (target == NULL) {
target = pcmk__xe_match(parent, object_name,
object_href, object_href_val);
}
if (target == NULL) {
target = create_xml_node(parent, object_name);
CRM_CHECK(target != NULL, return);
#if XML_PARSER_DEBUG
crm_trace("Added <%s%s%s%s%s/>", pcmk__s(object_name, "<null>"),
object_href ? " " : "",
object_href ? object_href : "",
object_href ? "=" : "",
object_href ? object_href_val : "");
} else {
crm_trace("Found node <%s%s%s%s%s/> to update",
pcmk__s(object_name, "<null>"),
object_href ? " " : "",
object_href ? object_href : "",
object_href ? "=" : "",
object_href ? object_href_val : "");
#endif
}
CRM_CHECK(pcmk__str_eq(crm_element_name(target), crm_element_name(update),
pcmk__str_casei),
return);
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 */
for (xmlAttrPtr a = pcmk__xe_first_attr(update); a != NULL;
a = a->next) {
const char *p_value = pcmk__xml_attr_value(a);
/* Remove it first so the ordering of the update is preserved */
xmlUnsetProp(target, a->name);
xmlSetProp(target, a->name, (pcmkXmlStr) p_value);
}
}
for (a_child = pcmk__xml_first_child(update); a_child != NULL;
a_child = pcmk__xml_next(a_child)) {
#if XML_PARSER_DEBUG
crm_trace("Updating child <%s%s%s%s%s/>",
pcmk__s(object_name, "<null>"),
object_href ? " " : "",
object_href ? object_href : "",
object_href ? "=" : "",
object_href ? object_href_val : "");
#endif
pcmk__xml_update(target, NULL, a_child, as_diff);
}
#if XML_PARSER_DEBUG
crm_trace("Finished with <%s%s%s%s%s/>", pcmk__s(object_name, "<null>"),
object_href ? " " : "",
object_href ? object_href : "",
object_href ? "=" : "",
object_href ? object_href_val : "");
#endif
}
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 (!pcmk__str_eq(crm_element_name(to_update), crm_element_name(child), pcmk__str_none)) {
can_update = FALSE;
} else if (!pcmk__str_eq(ID(to_update), ID(child), pcmk__str_none)) {
can_update = FALSE;
} else if (can_update) {
#if XML_PARSER_DEBUG
crm_log_xml_trace(child, "Update match found...");
#endif
pcmk__xml_update(NULL, child, to_update, false);
}
for (child_of_child = pcmk__xml_first_child(child); child_of_child != NULL;
child_of_child = pcmk__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 && !pcmk__str_eq(tag, crm_element_name(root), pcmk__str_casei)) {
} else if (value != NULL && !pcmk__str_eq(value, crm_element_value(root, field), pcmk__str_casei)) {
} else {
if (*children == NULL) {
*children = create_xml_node(NULL, __func__);
}
add_node_copy(*children, root);
match_found = 1;
}
if (search_matches || match_found == 0) {
xmlNode *child = NULL;
for (child = pcmk__xml_first_child(root); child != NULL;
child = pcmk__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 (!pcmk__str_eq(crm_element_name(update), crm_element_name(child), pcmk__str_casei)) {
can_delete = FALSE;
}
if (can_delete && delete_only) {
for (xmlAttrPtr a = pcmk__xe_first_attr(update); a != NULL;
a = a->next) {
const char *p_name = (const char *) a->name;
const char *p_value = pcmk__xml_attr_value(a);
right_val = crm_element_value(child, p_name);
if (!pcmk__str_eq(p_value, right_val, pcmk__str_casei)) {
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 = NULL;
xml_accept_changes(tmp);
old = xmlReplaceNode(child, tmp);
if(xml_tracking_changes(tmp)) {
/* Replaced sections may have included relevant ACLs */
pcmk__apply_acl(tmp);
}
xml_calculate_changes(old, tmp);
xmlDocSetRootElement(doc, old);
free_xml(old);
}
child = NULL;
return TRUE;
} else if (can_delete) {
crm_log_xml_debug(child, "Cannot delete the search root");
can_delete = FALSE;
}
child_of_child = pcmk__xml_first_child(child);
while (child_of_child) {
xmlNode *next = pcmk__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;
}
xmlNode *
sorted_xml(xmlNode *input, xmlNode *parent, gboolean recursive)
{
xmlNode *child = NULL;
GSList *nvpairs = NULL;
xmlNode *result = NULL;
const char *name = NULL;
CRM_CHECK(input != NULL, return NULL);
name = crm_element_name(input);
CRM_CHECK(name != NULL, return NULL);
result = create_xml_node(parent, name);
nvpairs = pcmk_xml_attrs2nvpairs(input);
nvpairs = pcmk_sort_nvpairs(nvpairs);
pcmk_nvpairs2xml_attrs(nvpairs, result);
pcmk_free_nvpairs(nvpairs);
for (child = pcmk__xml_first_child(input); child != NULL;
child = pcmk__xml_next(child)) {
if (recursive) {
sorted_xml(child, result, recursive);
} else {
add_node_copy(result, child);
}
}
return result;
}
xmlNode *
first_named_child(const xmlNode *parent, const char *name)
{
xmlNode *match = NULL;
for (match = pcmk__xe_first_child(parent); match != NULL;
match = pcmk__xe_next(match)) {
/*
* name == NULL gives first child regardless of name; this is
* semantically incorrect in this function, but may be necessary
* due to prior use of xml_child_iter_filter
*/
if (pcmk__str_eq(name, (const char *)match->name, pcmk__str_null_matches)) {
return match;
}
}
return NULL;
}
/*!
* \brief Get next instance of same XML tag
*
* \param[in] sibling XML tag to start from
*
* \return Next sibling XML tag with same name
*/
xmlNode *
crm_next_same_xml(const xmlNode *sibling)
{
xmlNode *match = pcmk__xe_next(sibling);
const char *name = crm_element_name(sibling);
while (match != NULL) {
if (!strcmp(crm_element_name(match), name)) {
return match;
}
match = pcmk__xe_next(match);
}
return NULL;
}
void
crm_xml_init(void)
{
static bool init = true;
if(init) {
init = false;
/* The default allocator XML_BUFFER_ALLOC_EXACT does far too many
* pcmk__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(free_private_data);
xmlRegisterNodeDefault(new_private_data);
crm_schema_init();
}
}
void
crm_xml_cleanup(void)
{
crm_schema_cleanup();
xmlCleanupParser();
}
#define XPATH_MAX 512
xmlNode *
expand_idref(xmlNode * input, xmlNode * top)
{
const char *tag = NULL;
const char *ref = NULL;
xmlNode *result = input;
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) {
char *xpath_string = crm_strdup_printf("//%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, pcmk__s(nodePath, "unrecognizable path"));
free(nodePath);
}
free(xpath_string);
}
return result;
}
void
crm_destroy_xml(gpointer data)
{
free_xml(data);
}
char *
pcmk__xml_artefact_root(enum pcmk__xml_artefact_ns ns)
{
static const char *base = NULL;
char *ret = NULL;
if (base == NULL) {
base = getenv("PCMK_schema_directory");
}
if (pcmk__str_empty(base)) {
base = CRM_SCHEMA_DIRECTORY;
}
switch (ns) {
case pcmk__xml_artefact_ns_legacy_rng:
case pcmk__xml_artefact_ns_legacy_xslt:
ret = strdup(base);
break;
case pcmk__xml_artefact_ns_base_rng:
case pcmk__xml_artefact_ns_base_xslt:
ret = crm_strdup_printf("%s/base", base);
break;
default:
crm_err("XML artefact family specified as %u not recognized", ns);
}
return ret;
}
char *
pcmk__xml_artefact_path(enum pcmk__xml_artefact_ns ns, const char *filespec)
{
char *base = pcmk__xml_artefact_root(ns), *ret = NULL;
switch (ns) {
case pcmk__xml_artefact_ns_legacy_rng:
case pcmk__xml_artefact_ns_base_rng:
ret = crm_strdup_printf("%s/%s.rng", base, filespec);
break;
case pcmk__xml_artefact_ns_legacy_xslt:
case pcmk__xml_artefact_ns_base_xslt:
ret = crm_strdup_printf("%s/%s.xsl", base, filespec);
break;
default:
crm_err("XML artefact family specified as %u not recognized", ns);
}
free(base);
return ret;
}
void
pcmk__xe_set_propv(xmlNodePtr node, va_list pairs)
{
while (true) {
const char *name, *value;
name = va_arg(pairs, const char *);
if (name == NULL) {
return;
}
value = va_arg(pairs, const char *);
if (value != NULL) {
crm_xml_add(node, name, value);
}
}
}
void
pcmk__xe_set_props(xmlNodePtr node, ...)
{
va_list pairs;
va_start(pairs, node);
pcmk__xe_set_propv(node, pairs);
va_end(pairs);
}
// Deprecated functions kept only for backward API compatibility
// LCOV_EXCL_START
#include <crm/common/xml_compat.h>
xmlNode *
find_entity(xmlNode *parent, const char *node_name, const char *id)
{
return pcmk__xe_match(parent, node_name,
((id == NULL)? id : XML_ATTR_ID), id);
}
// LCOV_EXCL_STOP
// End deprecated API

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