/* * Copyright (C) 2004 Andrew Beekhof * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if HAVE_BZLIB_H # include #endif #if HAVE_LIBXML2 # include # include # include #endif #if HAVE_LIBXSLT # include # include #endif #define XML_BUFFER_SIZE 4096 #define XML_PARSER_DEBUG 0 #define BEST_EFFORT_STATUS 0 #if LIBQB_LOGGING void xml_log(int priority, const char * fmt, ...) G_GNUC_PRINTF(2,3); void xml_log(int priority, const char * fmt, ...) { va_list ap; va_start(ap, fmt); qb_log_from_external_source_va(__FUNCTION__, __FILE__, fmt, priority, __LINE__, 0, ap); va_end(ap); } #else # define xml_log cl_log #endif typedef struct { xmlRelaxNGPtr rng; xmlRelaxNGValidCtxtPtr valid; xmlRelaxNGParserCtxtPtr parser; } relaxng_ctx_cache_t; struct schema_s { int type; const char *name; const char *location; const char *transform; int after_transform; void *cache; }; struct schema_s known_schemas[] = { /* 0 */ { 0, NULL, NULL, NULL, 1 }, /* 1 */ { 1, "pacemaker-0.6", "crm.dtd", "upgrade06.xsl", 4, NULL }, /* 2 */ { 1, "transitional-0.6", "crm-transitional.dtd", "upgrade06.xsl", 4, NULL }, /* 3 */ { 2, "pacemaker-0.7", "pacemaker-1.0.rng", NULL, 0, NULL }, /* 4 */ { 2, "pacemaker-1.0", "pacemaker-1.0.rng", NULL, 6, NULL }, /* 5 */ { 2, "pacemaker-1.1", "pacemaker-1.1.rng", NULL, 6, NULL }, /* 6 */ { 2, "pacemaker-1.2", "pacemaker-1.2.rng", NULL, 0, NULL }, /* 7 */ { 0, "none", NULL, NULL, 0, NULL }, }; static int all_schemas = DIMOF(known_schemas); static int max_schemas = DIMOF(known_schemas) - 2; /* skip back past 'none' */ typedef struct { int found; const char *string; } filter_t; static filter_t filter[] = { { 0, XML_ATTR_ORIGIN }, { 0, XML_CIB_ATTR_WRITTEN }, { 0, XML_ATTR_UPDATE_ORIG }, { 0, XML_ATTR_UPDATE_CLIENT }, { 0, XML_ATTR_UPDATE_USER }, }; static void add_ha_nocopy(HA_Message *parent, HA_Message *child, const char *field) { int next = parent->nfields; if (parent->nfields >= parent->nalloc && ha_msg_expand(parent) != HA_OK ) { crm_err("Parent expansion failed"); return; } parent->names[next] = crm_strdup(field); parent->nlens[next] = strlen(field); parent->values[next] = child; parent->vlens[next] = sizeof(HA_Message); parent->types[next] = FT_UNCOMPRESS; parent->nfields++; } static char *get_schema_path(const char *file) { static const char *base = NULL; if(base == NULL) { base = getenv("PCMK_schema_directory"); } if(base == NULL || strlen(base) == 0) { base = CRM_DTD_DIRECTORY; } return crm_concat(base, file, '/'); } int print_spaces(char *buffer, int spaces, int max); int get_tag_name(const char *input, size_t offset, size_t max); int get_attr_name(const char *input, size_t offset, size_t max); int get_attr_value(const char *input, size_t offset, size_t max); gboolean can_prune_leaf(xmlNode *xml_node); void diff_filter_context(int context, int upper_bound, int lower_bound, xmlNode *xml_node, xmlNode *parent); int in_upper_context(int depth, int context, xmlNode *xml_node); int write_file(const char *string, const char *filename); xmlNode *subtract_xml_object(xmlNode *parent, xmlNode *left, xmlNode *right, gboolean full, const char *marker); int add_xml_object(xmlNode *parent, xmlNode *target, xmlNode *update, gboolean as_diff); xmlNode * find_xml_node(xmlNode *root, const char * search_path, gboolean must_find) { xmlNode *a_child = NULL; const char *name = "NULL"; if(must_find || root != NULL) { crm_validate_data(root); } if(root != NULL) { name = crm_element_name(root); } if(search_path == NULL) { crm_warn("Will never find "); return NULL; } for(a_child = __xml_first_child(root); a_child != NULL; a_child = __xml_next(a_child)) { if(crm_str_eq((const char *)a_child->name, search_path, TRUE)) { /* crm_trace("returning node (%s).", crm_element_name(a_child)); */ crm_validate_data(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 .", search_path); } return NULL; } xmlNode* find_entity(xmlNode *parent, const char *node_name, const char *id) { xmlNode *a_child = NULL; crm_validate_data(parent); for(a_child = __xml_first_child(parent); a_child != NULL; a_child = __xml_next(a_child)) { /* Uncertain if node_name == NULL check is strictly necessary here */ if(node_name == NULL || crm_str_eq((const char *)a_child->name, node_name, TRUE)) { if(id == NULL || crm_str_eq(id, ID(a_child), TRUE)) { crm_trace("returning node (%s).", crm_element_name(a_child)); return a_child; } } } crm_trace("node <%s id=%s> not found in %s.", node_name, id, crm_element_name(parent)); return NULL; } void copy_in_properties(xmlNode* target, xmlNode *src) { crm_validate_data(src); crm_validate_data(target); if(src == NULL) { crm_warn("No node to copy properties from"); } else if (target == NULL) { crm_err("No node to copy properties into"); } else { xml_prop_iter( src, local_prop_name, local_prop_value, expand_plus_plus(target, local_prop_name, local_prop_value) ); crm_validate_data(target); } return; } void fix_plus_plus_recursive(xmlNode* target) { /* TODO: Remove recursion and use xpath searches for value++ */ xmlNode *child = NULL; xml_prop_iter(target, name, value, expand_plus_plus(target, name, value)); for(child = __xml_first_child(target); child != NULL; child = __xml_next(child)) { fix_plus_plus_recursive(child); } } void expand_plus_plus(xmlNode* target, const char *name, const char *value) { int offset = 1; int name_len = 0; int int_value = 0; int value_len = 0; const char *old_value = NULL; if(value == NULL || name == NULL) { return; } old_value = crm_element_value(target, name); if(old_value == NULL) { /* if no previous value, set unexpanded */ goto set_unexpanded; } else if(strstr(value, name) != value) { goto set_unexpanded; } name_len = strlen(name); value_len = strlen(value); if(value_len < (name_len + 2) || value[name_len] != '+' || (value[name_len+1] != '+' && value[name_len+1] != '=')) { goto set_unexpanded; } /* if we are expanding ourselves, * then no previous value was set and leave int_value as 0 */ if(old_value != value) { int_value = char2score(old_value); } if(value[name_len+1] != '+') { const char *offset_s = value+(name_len+2); offset = char2score(offset_s); } int_value += offset; if(int_value > INFINITY) { int_value = INFINITY; } crm_xml_add_int(target, name, int_value); return; set_unexpanded: if(old_value == value) { /* the old value is already set, nothing to do */ return; } crm_xml_add(target, name, value); return; } xmlDoc *getDocPtr(xmlNode *node) { xmlDoc *doc = NULL; CRM_CHECK(node != NULL, return NULL); doc = node->doc; if(doc == NULL) { doc = xmlNewDoc((const xmlChar*)"1.0"); xmlDocSetRootElement(doc, node); xmlSetTreeDoc(node, doc); } return doc; } xmlNode* add_node_copy(xmlNode *parent, xmlNode *src_node) { xmlNode *child = NULL; xmlDoc *doc = getDocPtr(parent); CRM_CHECK(src_node != NULL, return NULL); child = xmlDocCopyNode(src_node, doc, 1); xmlAddChild(parent, child); return child; } int add_node_nocopy(xmlNode *parent, const char *name, xmlNode *child) { add_node_copy(parent, child); free_xml(child); return HA_OK; } const char * crm_xml_add(xmlNode* node, const char *name, const char *value) { xmlAttr *attr = NULL; CRM_CHECK(node != NULL, return NULL); CRM_CHECK(name != NULL, return NULL); if(value == NULL) { return NULL; } #if XML_PARANOIA_CHECKS { const char *old_value = NULL; old_value = crm_element_value(node, name); /* Could be re-setting the same value */ CRM_CHECK(old_value != value, crm_err("Cannot reset %s with crm_xml_add(%s)", name, value); return value); } #endif attr = xmlSetProp(node, (const xmlChar*)name, (const xmlChar*)value); CRM_CHECK(attr && attr->children && attr->children->content, return NULL); return (char *)attr->children->content; } const char * crm_xml_replace(xmlNode* node, const char *name, const char *value) { xmlAttr *attr = NULL; const char *old_value = NULL; CRM_CHECK(node != NULL, return NULL); CRM_CHECK(name != NULL && name[0] != 0, return NULL); old_value = crm_element_value(node, name); /* Could be re-setting the same value */ CRM_CHECK(old_value != value, return value); if (old_value != NULL && value == NULL) { xml_remove_prop(node, name); return NULL; } else if(value == NULL) { return NULL; } attr = xmlSetProp(node, (const xmlChar*)name, (const xmlChar*)value); CRM_CHECK(attr && attr->children && attr->children->content, return NULL); return (char *)attr->children->content; } const char * crm_xml_add_int(xmlNode* node, const char *name, int value) { char *number = crm_itoa(value); const char *added = crm_xml_add(node, name, number); crm_free(number); return added; } xmlNode* create_xml_node(xmlNode *parent, const char *name) { xmlDoc *doc = NULL; xmlNode *node = NULL; if (name == NULL || name[0] == 0) { return NULL; } if(parent == NULL) { doc = xmlNewDoc((const xmlChar*)"1.0"); node = xmlNewDocRawNode(doc, NULL, (const xmlChar*)name, NULL); xmlDocSetRootElement(doc, node); } else { doc = getDocPtr(parent); node = xmlNewDocRawNode(doc, NULL, (const xmlChar*)name, NULL); xmlAddChild(parent, node); } return node; } void free_xml_from_parent(xmlNode *parent, xmlNode *a_node) { CRM_CHECK(a_node != NULL, return); xmlUnlinkNode(a_node); xmlFreeNode(a_node); } xmlNode* copy_xml(xmlNode *src) { xmlDoc *doc = xmlNewDoc((const xmlChar*)"1.0"); xmlNode *copy = xmlDocCopyNode(src, doc, 1); xmlDocSetRootElement(doc, copy); xmlSetTreeDoc(copy, doc); return copy; } static void crm_xml_err(void * ctx, const char * msg, ...) G_GNUC_PRINTF(2,3); extern size_t strlcat(char * dest, const char *source, size_t len); int write_file(const char *string, const char *filename) { int rc = 0; FILE *file_output_strm = NULL; CRM_CHECK(filename != NULL, return -1); if (string == NULL) { crm_err("Cannot write NULL to %s", filename); return -1; } file_output_strm = fopen(filename, "w"); if(file_output_strm == NULL) { crm_perror(LOG_ERR,"Cannot open %s for writing", filename); return -1; } rc = fprintf(file_output_strm, "%s", string); if(rc < 0) { crm_perror(LOG_ERR,"Cannot write output to %s", filename); } if(fflush(file_output_strm) != 0) { crm_perror(LOG_ERR,"fflush for %s failed:", filename); rc = -1; } if(fsync(fileno(file_output_strm)) < 0) { crm_perror(LOG_ERR,"fsync for %s failed:", filename); rc = -1; } fclose(file_output_strm); return rc; } static void crm_xml_err(void * ctx, const char * msg, ...) { int len = 0; va_list args; char *buf = NULL; static int buffer_len = 0; static char *buffer = NULL; va_start(args, msg); len = vasprintf(&buf, msg, args); if(strchr(buf, '\n')) { buf[len - 1] = 0; if(buffer) { crm_err("XML Error: %s%s", buffer, buf); free(buffer); } else { crm_err("XML Error: %s", buf); } buffer = NULL; buffer_len = 0; } else if(buffer == NULL) { buffer_len = len; buffer = buf; buf = NULL; } else { buffer_len += len; buffer = realloc(buffer, buffer_len); strlcat(buffer, buf, buffer_len); } va_end(args); free(buf); } xmlNode* string2xml(const char *input) { xmlNode *xml = NULL; xmlDocPtr output = NULL; xmlParserCtxtPtr ctxt = NULL; xmlErrorPtr last_error = NULL; if(input == NULL) { crm_err("Can't parse NULL input"); return NULL; } /* create a parser context */ ctxt = xmlNewParserCtxt(); CRM_CHECK(ctxt != NULL, return NULL); /* xmlCtxtUseOptions(ctxt, XML_PARSE_NOBLANKS|XML_PARSE_RECOVER); */ xmlCtxtResetLastError(ctxt); xmlSetGenericErrorFunc(ctxt, crm_xml_err); /* initGenericErrorDefaultFunc(crm_xml_err); */ output = xmlCtxtReadDoc(ctxt, (const xmlChar*)input, NULL, NULL, XML_PARSE_NOBLANKS|XML_PARSE_RECOVER); if(output) { xml = xmlDocGetRootElement(output); } last_error = xmlCtxtGetLastError(ctxt); if(last_error && last_error->code != XML_ERR_OK) { /* crm_abort(__FILE__,__PRETTY_FUNCTION__,__LINE__, "last_error->code != XML_ERR_OK", TRUE, TRUE); */ /* * http://xmlsoft.org/html/libxml-xmlerror.html#xmlErrorLevel * http://xmlsoft.org/html/libxml-xmlerror.html#xmlParserErrors */ crm_warn("Parsing failed (domain=%d, level=%d, code=%d): %s", last_error->domain, last_error->level, last_error->code, last_error->message); if(last_error->code != XML_ERR_DOCUMENT_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); crm_warn("String start: %.50s", input); crm_warn("String start+%d: %s", len-50, input+len-50); crm_abort(__FILE__,__PRETTY_FUNCTION__,__LINE__, "String parsing error", TRUE, TRUE); } } xmlFreeParserCtxt(ctxt); return xml; } xmlNode * stdin2xml(void) { size_t data_length = 0; size_t read_chars = 0; char *xml_buffer = NULL; xmlNode *xml_obj = NULL; do { crm_realloc(xml_buffer, XML_BUFFER_SIZE + data_length + 1); read_chars = fread(xml_buffer + data_length, 1, XML_BUFFER_SIZE, stdin); data_length += read_chars; } while (read_chars > 0); if(data_length == 0) { crm_warn("No XML supplied on stdin"); crm_free(xml_buffer); return NULL; } xml_buffer[data_length] = '\0'; xml_obj = string2xml(xml_buffer); crm_free(xml_buffer); crm_log_xml_trace(xml_obj, "Created fragment"); return xml_obj; } static char * decompress_file(const char *filename) { char *buffer = NULL; #if HAVE_BZLIB_H int rc = 0; size_t length = 0, read_len = 0; BZFILE *bz_file = NULL; FILE *input = fopen(filename, "r"); if(input == NULL) { crm_perror(LOG_ERR,"Could not open %s for reading", filename); return NULL; } bz_file = BZ2_bzReadOpen(&rc, input, 0, 0, NULL, 0); if ( rc != BZ_OK ) { BZ2_bzReadClose ( &rc, bz_file); return NULL; } rc = BZ_OK; while ( rc == BZ_OK ) { crm_realloc(buffer, XML_BUFFER_SIZE + length + 1); read_len = BZ2_bzRead ( &rc, bz_file, buffer + length, XML_BUFFER_SIZE); crm_trace("Read %ld bytes from file: %d", (long)read_len, rc); if ( rc == BZ_OK || rc == BZ_STREAM_END) { length += read_len; } } buffer[length] = '\0'; read_len = length; if ( rc != BZ_STREAM_END ) { crm_err("Couldnt read compressed xml from file"); crm_free(buffer); buffer = NULL; } BZ2_bzReadClose (&rc, bz_file); fclose(input); #else crm_err("Cannot read compressed files:" " bzlib was not available at compile time"); #endif return buffer; } static void strip_text_nodes(xmlNode *xml) { xmlNode *iter = NULL; for(iter = xml->children; iter; iter = iter->next) { switch(iter->type) { case XML_TEXT_NODE: /* Remove it */ xmlUnlinkNode(iter); xmlFreeNode(iter); /* Start again since xml->children will have changed */ strip_text_nodes(xml); return; case XML_ELEMENT_NODE: /* Search it */ strip_text_nodes(iter); break; default: /* Leave it */ break; } } } xmlNode * filename2xml(const char *filename) { xmlNode *xml = NULL; xmlDocPtr output = NULL; const char *match = NULL; xmlParserCtxtPtr ctxt = NULL; xmlErrorPtr last_error = NULL; static int xml_options = XML_PARSE_NOBLANKS|XML_PARSE_RECOVER; /* create a parser context */ ctxt = xmlNewParserCtxt(); CRM_CHECK(ctxt != NULL, return NULL); /* xmlCtxtUseOptions(ctxt, XML_PARSE_NOBLANKS|XML_PARSE_RECOVER); */ xmlCtxtResetLastError(ctxt); xmlSetGenericErrorFunc(ctxt, crm_xml_err); /* initGenericErrorDefaultFunc(crm_xml_err); */ if(filename) { match = strstr(filename, ".bz2"); } if(filename == NULL) { /* STDIN_FILENO == fileno(stdin) */ output = xmlCtxtReadFd(ctxt, STDIN_FILENO, "unknown.xml", NULL, xml_options); } else if(match == NULL || match[4] != 0) { output = xmlCtxtReadFile(ctxt, filename, NULL, xml_options); } else { char *input = decompress_file(filename); output = xmlCtxtReadDoc(ctxt, (const xmlChar*)input, NULL, NULL, xml_options); crm_free(input); } if(output && (xml = xmlDocGetRootElement(output))) { strip_text_nodes(xml); } last_error = xmlCtxtGetLastError(ctxt); if(last_error && last_error->code != XML_ERR_OK) { /* crm_abort(__FILE__,__PRETTY_FUNCTION__,__LINE__, "last_error->code != XML_ERR_OK", TRUE, TRUE); */ /* * http://xmlsoft.org/html/libxml-xmlerror.html#xmlErrorLevel * http://xmlsoft.org/html/libxml-xmlerror.html#xmlParserErrors */ crm_err("Parsing failed (domain=%d, level=%d, code=%d): %s", last_error->domain, last_error->level, last_error->code, last_error->message); if(last_error && last_error->code != XML_ERR_OK) { crm_err("Couldn't%s parse %s", xml?" fully":"", filename); if(xml != NULL) { crm_log_xml_err(xml, "Partial"); } } } xmlFreeParserCtxt(ctxt); return xml; } int write_xml_file(xmlNode *xml_node, const char *filename, gboolean compress) { int res = 0; time_t now; char *buffer = NULL; char *now_str = NULL; unsigned int out = 0; FILE *file_output_strm = NULL; static mode_t cib_mode = S_IRUSR|S_IWUSR; CRM_CHECK(filename != NULL, return -1); crm_trace("Writing XML out to %s", filename); crm_validate_data(xml_node); if (xml_node == NULL) { crm_err("Cannot write NULL to %s", filename); return -1; } file_output_strm = fopen(filename, "w"); if(file_output_strm == NULL) { crm_perror(LOG_ERR,"Cannot open %s for writing", filename); return -1; } /* establish the correct permissions */ fchmod(fileno(file_output_strm), cib_mode); crm_log_xml_trace(xml_node, "Writing out"); now = time(NULL); now_str = ctime(&now); now_str[24] = EOS; /* replace the newline */ crm_xml_add(xml_node, XML_CIB_ATTR_WRITTEN, now_str); crm_validate_data(xml_node); buffer = dump_xml_formatted(xml_node); CRM_CHECK(buffer != NULL && strlen(buffer) > 0, crm_log_xml_warn(xml_node, "dump:failed"); goto bail); if(compress) { #if HAVE_BZLIB_H int rc = BZ_OK; unsigned int in = 0; BZFILE *bz_file = NULL; bz_file = BZ2_bzWriteOpen(&rc, file_output_strm, 5, 0, 30); if(rc != BZ_OK) { crm_err("bzWriteOpen failed: %d", rc); } else { BZ2_bzWrite(&rc,bz_file,buffer,strlen(buffer)); if(rc != BZ_OK) { crm_err("bzWrite() failed: %d", rc); } } if(rc == BZ_OK) { BZ2_bzWriteClose(&rc, bz_file, 0, &in, &out); if(rc != BZ_OK) { crm_err("bzWriteClose() failed: %d",rc); out = -1; } else { crm_trace("%s: In: %d, out: %d", filename, in, out); } } #else crm_err("Cannot write compressed files:" " bzlib was not available at compile time"); #endif } if(out <= 0) { res = fprintf(file_output_strm, "%s", buffer); if(res < 0) { crm_perror(LOG_ERR,"Cannot write output to %s", filename); goto bail; } } bail: if(fflush(file_output_strm) != 0) { crm_perror(LOG_ERR,"fflush for %s failed:", filename); res = -1; } if(fsync(fileno(file_output_strm)) < 0) { crm_perror(LOG_ERR,"fsync for %s failed:", filename); res = -1; } fclose(file_output_strm); crm_trace("Saved %d bytes to the Cib as XML", res); crm_free(buffer); return res; } static HA_Message* convert_xml_message_struct(HA_Message *parent, xmlNode *src_node, const char *field) { xmlNode *child = NULL; xmlNode *__crm_xml_iter = src_node->children; xmlAttrPtr prop_iter = src_node->properties; const char *name = NULL; const char *value = NULL; HA_Message *result = ha_msg_new(3); ha_msg_add(result, F_XML_TAGNAME, (const char *)src_node->name); while(prop_iter != NULL) { name = (const char *)prop_iter->name; value = (const char *)xmlGetProp(src_node, prop_iter->name); prop_iter = prop_iter->next; ha_msg_add(result, name, value); } while(__crm_xml_iter != NULL) { child = __crm_xml_iter; __crm_xml_iter = __crm_xml_iter->next; convert_xml_message_struct(result, child, NULL); } if(parent == NULL) { return result; } if(field) { HA_Message *holder = ha_msg_new(3); CRM_ASSERT(holder != NULL); ha_msg_add(holder, F_XML_TAGNAME, field); add_ha_nocopy(holder, result, (const char*)src_node->name); ha_msg_addstruct_compress(parent, field, holder); ha_msg_del(holder); } else { add_ha_nocopy(parent, result, (const char*)src_node->name); } return result; } static void convert_xml_child(HA_Message *msg, xmlNode *xml) { int orig = 0; int rc = BZ_OK; unsigned int len = 0; char *buffer = NULL; char *compressed = NULL; const char *name = NULL; name = (const char *)xml->name; buffer = dump_xml_unformatted(xml); orig = strlen(buffer); if(orig < CRM_BZ2_THRESHOLD) { ha_msg_add(msg, name, buffer); goto done; } len = (orig * 1.1) + 600; /* recomended size */ crm_malloc(compressed, len); rc = BZ2_bzBuffToBuffCompress(compressed, &len, buffer, orig, CRM_BZ2_BLOCKS, 0, CRM_BZ2_WORK); if(rc != BZ_OK) { crm_err("Compression failed: %d", rc); crm_free(compressed); convert_xml_message_struct(msg, xml, name); goto done; } crm_free(buffer); buffer = compressed; crm_trace("Compression details: %d -> %d", orig, len); ha_msg_addbin(msg, name, buffer, len); done: crm_free(buffer); # if 0 { unsigned int used = orig; char *uncompressed = NULL; crm_debug("Trying to decompress %d bytes", len); crm_malloc0(uncompressed, orig); rc = BZ2_bzBuffToBuffDecompress( uncompressed, &used, compressed, len, 1, 0); CRM_CHECK(rc == BZ_OK, ;); CRM_CHECK(used == orig, ;); crm_debug("rc=%d, used=%d", rc, used); if(rc != BZ_OK) { exit(100); } crm_debug("Original %s, decompressed %s", buffer, uncompressed); crm_free(uncompressed); } # endif } HA_Message* convert_xml_message(xmlNode *xml) { xmlNode *child = NULL; HA_Message *result = NULL; result = ha_msg_new(3); ha_msg_add(result, F_XML_TAGNAME, (const char *)xml->name); xml_prop_iter(xml, name, value, ha_msg_add(result, name, value)); for(child = __xml_first_child(xml); child != NULL; child = __xml_next(child)) { convert_xml_child(result, child); } return result; } static void convert_ha_field(xmlNode *parent, HA_Message *msg, int lpc) { int type = 0; const char *name = NULL; const char *value = NULL; xmlNode *xml = NULL; int rc = BZ_OK; size_t orig_len = 0; unsigned int used = 0; char *uncompressed = NULL; char *compressed = NULL; int size = orig_len * 10; CRM_CHECK(parent != NULL, return); CRM_CHECK(msg != NULL, return); name = msg->names[lpc]; type = cl_get_type(msg, name); switch(type) { case FT_STRUCT: convert_ha_message(parent, msg->values[lpc], name); break; case FT_COMPRESS: case FT_UNCOMPRESS: convert_ha_message(parent, cl_get_struct(msg, name), name); break; case FT_STRING: value = msg->values[lpc]; CRM_CHECK(value != NULL, return); crm_trace("Converting %s/%d/%s", name, type, value[0] == '<' ? "xml":"field"); if( value[0] != '<' ) { crm_xml_add(parent, name, value); break; } /* unpack xml string */ xml = string2xml(value); if(xml == NULL) { crm_err("Conversion of field '%s' failed", name); return; } add_node_nocopy(parent, NULL, xml); break; case FT_BINARY: value = cl_get_binary(msg, name, &orig_len); size = orig_len * 10 + 1; /* +1 because an exact 10x compression factor happens occasionally */ if(orig_len < 3 || value[0] != 'B' || value[1] != 'Z' || value[2] != 'h') { if(strstr(name, "uuid") == NULL) { crm_err("Skipping non-bzip binary field: %s", name); } return; } crm_malloc0(compressed, orig_len); memcpy(compressed, value, orig_len); crm_trace("Trying to decompress %d bytes", (int)orig_len); retry: crm_realloc(uncompressed, size); memset(uncompressed, 0, size); used = size - 1; /* always leave room for a trailing '\0' * BZ2_bzBuffToBuffDecompress wont say anything if * the uncompressed data is exactly 'size' bytes */ rc = BZ2_bzBuffToBuffDecompress( uncompressed, &used, compressed, orig_len, 1, 0); if(rc == BZ_OUTBUFF_FULL) { size = size * 2; /* dont try to allocate more memory than we have */ if(size > 0) { goto retry; } } if(rc != BZ_OK) { crm_err("Decompression of %s (%d bytes) into %d failed: %d", name, (int)orig_len, size, rc); } else if(used >= size) { CRM_ASSERT(used < size); } else { CRM_LOG_ASSERT(uncompressed[used] == 0); uncompressed[used] = 0; xml = string2xml(uncompressed); } if(xml != NULL) { add_node_copy(parent, xml); free_xml(xml); } crm_free(uncompressed); crm_free(compressed); break; } } xmlNode * convert_ha_message(xmlNode *parent, HA_Message *msg, const char *field) { int lpc = 0; xmlNode *child = NULL; const char *tag = NULL; CRM_CHECK(msg != NULL, crm_err("Empty message for %s", field); return parent); tag = cl_get_string(msg, F_XML_TAGNAME); if(tag == NULL) { tag = field; } else if(parent && safe_str_neq(field, tag)) { /* For compatability with 0.6.x */ crm_debug("Creating intermediate parent %s between %s and %s", field, crm_element_name(parent), tag); parent = create_xml_node(parent, field); } if(parent == NULL) { parent = create_xml_node(NULL, tag); child = parent; } else { child = create_xml_node(parent, tag); } for (lpc = 0; lpc < msg->nfields; lpc++) { convert_ha_field(child, msg, lpc); } return parent; } xmlNode *convert_ipc_message(IPC_Message *msg, const char *field) { HA_Message *hmsg = wirefmt2msg((char *)msg->msg_body, msg->msg_len, 0); xmlNode *xml = convert_ha_message(NULL, hmsg, __FUNCTION__); crm_msg_del(hmsg); return xml; } xmlNode * get_message_xml(xmlNode *msg, const char *field) { xmlNode *tmp = first_named_child(msg, field); return __xml_first_child(tmp); } gboolean add_message_xml(xmlNode *msg, const char *field, xmlNode *xml) { xmlNode *holder = create_xml_node(msg, field); add_node_copy(holder, xml); return TRUE; } static char * dump_xml(xmlNode *an_xml_node, gboolean formatted, gboolean for_digest) { int len = 0; char *buffer = NULL; xmlBuffer *xml_buffer = NULL; xmlDoc *doc = getDocPtr(an_xml_node); /* doc will only be NULL if an_xml_node is */ CRM_CHECK(doc != NULL, return NULL); xml_buffer = xmlBufferCreate(); CRM_ASSERT(xml_buffer != NULL); len = xmlNodeDump(xml_buffer, doc, an_xml_node, 0, formatted); if(len > 0) { /* The copying here isn't ideal, but it doesn't even register * in the perf numbers */ if(for_digest) { /* for compatability with the old result which is used for digests */ len += 3; crm_malloc0(buffer, len); snprintf(buffer, len, " %s\n", (char *)xml_buffer->content); } else { buffer = crm_strdup((char *)xml_buffer->content); } } else { crm_err("Conversion failed"); } xmlBufferFree(xml_buffer); return buffer; } char * dump_xml_formatted(xmlNode *an_xml_node) { return dump_xml(an_xml_node, TRUE, FALSE); } char * dump_xml_unformatted(xmlNode *an_xml_node) { return dump_xml(an_xml_node, FALSE, FALSE); } #define update_buffer() do { \ if(printed < 0) { \ crm_perror(LOG_ERR,"snprintf failed"); \ goto print; \ } else if(printed >= (buffer_len - offset)) { \ crm_err("Output truncated: available=%d, needed=%d", buffer_len - offset, printed); \ offset += printed; \ goto print; \ } else if(offset >= buffer_len) { \ crm_err("Buffer exceeded"); \ offset += printed; \ goto print; \ } else { \ offset += printed; \ } \ } while(0) int print_spaces(char *buffer, int depth, int max) { int lpc = 0; int spaces = 2*depth; max--; /* <= so that we always print 1 space - prevents problems with syslog */ for(lpc = 0; lpc <= spaces && lpc < max; lpc++) { if(sprintf(buffer+lpc, "%c", ' ') < 1) { return -1; } } return lpc; } int log_data_element( int log_level, const char *file, const char *function, int line, const char *prefix, xmlNode *data, int depth, gboolean formatted) { xmlNode *a_child = NULL; int child_result = 0; int offset = 0; int printed = 0; char *buffer = NULL; int buffer_len = 1000; const char *name = NULL; const char *hidden = NULL; /* 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 0; } if(prefix == NULL) { prefix = ""; } name = crm_element_name(data); CRM_ASSERT(name != NULL); crm_trace("Dumping %s", name); crm_malloc0(buffer, buffer_len); if(formatted) { offset = print_spaces(buffer, depth, buffer_len - offset); } printed = snprintf(buffer + offset, buffer_len - offset, "<%s", name); update_buffer(); hidden = crm_element_value(data, "hidden"); xml_prop_iter( data, prop_name, prop_value, if(prop_name == NULL || safe_str_eq(F_XML_TAGNAME, prop_name)) { continue; } else if(hidden != NULL && prop_name[0] != 0 && strstr(hidden, prop_name) != NULL) { prop_value = "*****"; } crm_trace("Dumping <%s %s=\"%s\"...", name, prop_name, prop_value); printed = snprintf(buffer + offset, buffer_len - offset, " %s=\"%s\"", prop_name, prop_value); update_buffer(); ); printed = snprintf(buffer + offset, buffer_len - offset, " %s>", xml_has_children(data)?"":"/"); update_buffer(); print: do_crm_log_alias(log_level, file, function, line, "%s%s", prefix, buffer); if(xml_has_children(data) == FALSE) { crm_free(buffer); return 0; } for(a_child = __xml_first_child(data); a_child != NULL; a_child = __xml_next(a_child)) { child_result = log_data_element( log_level, file, function, line, prefix, a_child, depth+1, formatted); } if(formatted) { offset = print_spaces(buffer, depth, buffer_len); } printed = snprintf(buffer + offset, buffer_len - offset, "", name); update_buffer(); do_crm_log_alias(log_level, file, function, line, "%s%s", prefix, buffer); crm_free(buffer); return 1; } gboolean xml_has_children(const xmlNode *xml_root) { if(xml_root != NULL && xml_root->children != NULL) { return TRUE; } return FALSE; } void xml_validate(const xmlNode *xml_root) { CRM_ASSERT(xml_root != NULL); } int crm_element_value_int(xmlNode *data, const char *name, int *dest) { const char *value = crm_element_value(data, name); CRM_CHECK(dest != NULL, return -1); if(value) { *dest = crm_int_helper(value, NULL); return 0; } return -1; } int crm_element_value_const_int(const xmlNode *data, const char *name, int *dest) { return crm_element_value_int((xmlNode*)data, name, dest); } const char * crm_element_value_const(const xmlNode *data, const char *name) { return crm_element_value((xmlNode*)data, name); } char * crm_element_value_copy(xmlNode *data, const char *name) { char *value_copy = NULL; const char *value = crm_element_value(data, name); if(value != NULL) { value_copy = crm_strdup(value); } return value_copy; } void xml_remove_prop(xmlNode *obj, const char *name) { xmlUnsetProp(obj, (const xmlChar*)name); } void log_xml_diff(unsigned int log_level, xmlNode *diff, const char *function) { xmlNode *child = NULL; xmlNode *added = find_xml_node(diff, "diff-added", FALSE); xmlNode *removed = find_xml_node(diff, "diff-removed", FALSE); gboolean is_first = TRUE; if(get_crm_log_level() < log_level) { /* nothing will ever be printed */ return; } for(child = __xml_first_child(removed); child != NULL; child = __xml_next(child)) { log_data_element(log_level, "", function, 0, "-", child, 0, TRUE); if(is_first) { is_first = FALSE; } else { do_crm_log(log_level, " --- "); } } is_first = TRUE; for(child = __xml_first_child(added); child != NULL; child = __xml_next(child)) { log_data_element(log_level, "", function, 0, "+", child, 0, TRUE); if(is_first) { is_first = FALSE; } else { do_crm_log(log_level, " +++ "); } } } void purge_diff_markers(xmlNode *a_node) { xmlNode *child = NULL; CRM_CHECK(a_node != NULL, return); xml_remove_prop(a_node, XML_DIFF_MARKER); for(child = __xml_first_child(a_node); child != NULL; child = __xml_next(child)) { purge_diff_markers(child); } } gboolean apply_xml_diff(xmlNode *old, xmlNode *diff, xmlNode **new) { gboolean result = TRUE; int root_nodes_seen = 0; const char *digest = crm_element_value(diff, XML_ATTR_DIGEST); const char *version = crm_element_value(diff, XML_ATTR_CRM_VERSION); xmlNode *child_diff = NULL; xmlNode *added = find_xml_node(diff, "diff-added", FALSE); xmlNode *removed = find_xml_node(diff, "diff-removed", FALSE); CRM_CHECK(new != NULL, return FALSE); crm_trace("Substraction Phase"); for(child_diff = __xml_first_child(removed); child_diff != NULL; child_diff = __xml_next(child_diff)) { CRM_CHECK(root_nodes_seen == 0, result = FALSE); if(root_nodes_seen == 0) { *new = subtract_xml_object(NULL, old, child_diff, FALSE, NULL); } root_nodes_seen++; } if(root_nodes_seen == 0) { *new = copy_xml(old); } else if(root_nodes_seen > 1) { crm_err("(-) Diffs cannot contain more than one change set..." " saw %d", root_nodes_seen); result = FALSE; } root_nodes_seen = 0; crm_trace("Addition Phase"); if(result) { xmlNode *child_diff = NULL; for(child_diff = __xml_first_child(added); child_diff != NULL; child_diff = __xml_next(child_diff)) { CRM_CHECK(root_nodes_seen == 0, result = FALSE); if(root_nodes_seen == 0) { add_xml_object(NULL, *new, child_diff, TRUE); } root_nodes_seen++; } } if(root_nodes_seen > 1) { crm_err("(+) Diffs cannot contain more than one change set..." " saw %d", root_nodes_seen); result = FALSE; } else if(result && digest) { char *new_digest = NULL; purge_diff_markers(*new); /* Purge now so the diff is ok */ new_digest = calculate_xml_versioned_digest(*new, FALSE, TRUE, version); if(safe_str_neq(new_digest, digest)) { crm_info("Digest mis-match: expected %s, calculated %s", digest, new_digest); crm_log_xml_trace(old, "diff:original"); crm_log_xml_trace(diff, "diff:input"); result = FALSE; } else { crm_trace("Digest matched: expected %s, calculated %s", digest, new_digest); } crm_free(new_digest); #if XML_PARANOIA_CHECKS } else if(result) { int lpc = 0; xmlNode *intermediate = NULL; xmlNode *diff_of_diff = NULL; xmlNode *calc_added = NULL; xmlNode *calc_removed = NULL; const char *value = NULL; const char *name = NULL; const char *version_attrs[] = { XML_ATTR_NUMUPDATES, XML_ATTR_GENERATION, XML_ATTR_GENERATION_ADMIN }; crm_trace("Verification Phase"); intermediate = diff_xml_object(old, *new, FALSE); calc_added = find_xml_node(intermediate, "diff-added", FALSE); calc_removed = find_xml_node(intermediate, "diff-removed", FALSE); /* add any version details to the diff so they match */ for(lpc = 0; lpc < DIMOF(version_attrs); lpc++) { name = version_attrs[lpc]; value = crm_element_value(added, name); crm_xml_add(calc_added, name, value); value = crm_element_value(removed, name); crm_xml_add(calc_removed, name, value); } diff_of_diff = diff_xml_object(intermediate, diff, TRUE); if(diff_of_diff != NULL) { crm_info("Diff application failed!"); crm_log_xml_debug(old, "diff:original"); crm_log_xml_debug(diff, "diff:input"); result = FALSE; } else { purge_diff_markers(*new); } free_xml(diff_of_diff); free_xml(intermediate); diff_of_diff = NULL; intermediate = NULL; #endif } return result; } xmlNode * diff_xml_object(xmlNode *old, xmlNode *new, gboolean suppress) { xmlNode *tmp1 = NULL; xmlNode *diff = create_xml_node(NULL, "diff"); xmlNode *removed = create_xml_node(diff, "diff-removed"); xmlNode *added = create_xml_node(diff, "diff-added"); crm_xml_add(diff, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET); tmp1 = subtract_xml_object(removed, old, new, FALSE, "removed:top"); if(suppress && tmp1 != NULL && can_prune_leaf(tmp1)) { free_xml_from_parent(removed, tmp1); } tmp1 = subtract_xml_object(added, new, old, TRUE, "added:top"); if(suppress && tmp1 != NULL && can_prune_leaf(tmp1)) { free_xml_from_parent(added, tmp1); } if(added->children == NULL && removed->children == NULL) { free_xml(diff); diff = NULL; } return diff; } gboolean can_prune_leaf(xmlNode *xml_node) { xmlNode *child = NULL; gboolean can_prune = TRUE; /* return FALSE; */ xml_prop_name_iter(xml_node, prop_name, if(safe_str_eq(prop_name, XML_ATTR_ID)) { continue; } can_prune = FALSE; ); for(child = __xml_first_child(xml_node); child != NULL; child = __xml_next(child)) { if(can_prune_leaf(child)) { free_xml(child); } else { can_prune = FALSE; } } return can_prune; } void diff_filter_context(int context, int upper_bound, int lower_bound, xmlNode *xml_node, xmlNode *parent) { xmlNode *us = NULL; xmlNode *child = NULL; xmlNode *new_parent = parent; const char *name = crm_element_name(xml_node); CRM_CHECK(xml_node != NULL && name != NULL, return); us = create_xml_node(parent, name); xml_prop_iter(xml_node, prop_name, prop_value, lower_bound = context; crm_xml_add(us, prop_name, prop_value); ); if(lower_bound >= 0 || upper_bound >= 0) { crm_xml_add(us, XML_ATTR_ID, ID(xml_node)); new_parent = us; } else { upper_bound = in_upper_context(0, context, xml_node); if(upper_bound >= 0) { crm_xml_add(us, XML_ATTR_ID, ID(xml_node)); new_parent = us; } else { free_xml(us); us = NULL; } } for(child = __xml_first_child(us); child != NULL; child = __xml_next(child)) { diff_filter_context(context, upper_bound-1, lower_bound-1, child, new_parent); } } int in_upper_context(int depth, int context, xmlNode *xml_node) { gboolean has_attributes = FALSE; if(context == 0) { return 0; } xml_prop_name_iter(xml_node, prop_name, has_attributes = TRUE; break); if(has_attributes) { return depth; } else if(depth < context) { xmlNode *child = NULL; for(child = __xml_first_child(xml_node); child != NULL; child = __xml_next(child)) { if(in_upper_context(depth+1, context, child)) { return depth; } } } return 0; } xmlNode * subtract_xml_object(xmlNode *parent, xmlNode *left, xmlNode *right, gboolean full, const char *marker) { gboolean skip = FALSE; gboolean differences = FALSE; xmlNode *diff = NULL; xmlNode *child_diff = NULL; xmlNode *right_child = NULL; xmlNode *left_child = NULL; const char *id = NULL; const char *name = NULL; const char *value = NULL; const char *right_val = NULL; int lpc = 0; static int filter_len = DIMOF(filter); if(left == NULL) { return NULL; } id = ID(left); if(right == NULL) { xmlNode *deleted = NULL; crm_trace("Processing <%s id=%s> (complete copy)", crm_element_name(left), id); deleted = add_node_copy(parent, left); crm_xml_add(deleted, XML_DIFF_MARKER, marker); return deleted; } name = crm_element_name(left); CRM_CHECK(name != NULL, return NULL); /* Avoiding creating the full heirarchy would save even more work here */ diff = create_xml_node(parent, name); /* Reset filter */ for(lpc = 0; lpc < filter_len; lpc++){ filter[lpc].found = FALSE; } /* changes to child objects */ for(left_child = __xml_first_child(left); left_child != NULL; left_child = __xml_next(left_child)) { right_child = find_entity( right, crm_element_name(left_child), ID(left_child)); child_diff = subtract_xml_object(diff, left_child, right_child, full, marker); if(child_diff != NULL) { differences = TRUE; } } if(differences == FALSE) { /* check for XML_DIFF_MARKER in a child */ for(right_child = __xml_first_child(right); right_child != NULL; right_child = __xml_next(right_child)) { value = crm_element_value(right_child, XML_DIFF_MARKER); if(value != NULL && safe_str_eq(value, "removed:top")) { crm_trace("Found the root of the deletion: %s", name); xml_prop_iter(left, name, value, xmlSetProp(diff, (const xmlChar*)name, (const xmlChar*)value)); differences = TRUE; goto done; } } } else if(full) { xml_prop_iter(left, name, value, xmlSetProp(diff, (const xmlChar*)name, (const xmlChar*)value)); /* We already have everything we need... */ goto done; } else if(id) { xmlSetProp(diff, (const xmlChar*)XML_ATTR_ID, (const xmlChar*)id); } /* changes to name/value pairs */ xml_prop_name_iter( left, prop_name, if(crm_str_eq(prop_name, XML_ATTR_ID, TRUE)) { continue; } skip = FALSE; for(lpc = 0; skip == FALSE && lpc < filter_len; lpc++){ if(filter[lpc].found == FALSE && crm_str_eq(prop_name, filter[lpc].string, TRUE)) { filter[lpc].found = TRUE; skip = TRUE; break; } } if(skip) { continue; } right_val = crm_element_value(right, prop_name); if(right_val == NULL) { /* new */ differences = TRUE; if(full) { xml_prop_iter(left, name, value, xmlSetProp(diff, (const xmlChar*)name, (const xmlChar*)value)); break; } else { const char *left_value = crm_element_value(left, prop_name); xmlSetProp(diff, (const xmlChar*)prop_name, (const xmlChar*)value); crm_xml_add(diff, prop_name, left_value); } } else { /* Only now do we need the left value */ const char *left_value = crm_element_value(left, prop_name); if(strcmp(left_value, right_val) == 0) { /* unchanged */ } else { /* changed */ differences = TRUE; if(full) { xml_prop_iter(left, name, value, xmlSetProp(diff, (const xmlChar*)name, (const xmlChar*)value)); break; } else { crm_xml_add(diff, prop_name, left_value); } } } ); if(differences == FALSE) { free_xml_from_parent(parent, diff); crm_trace("\tNo changes to <%s id=%s>", crm_str(name), id); return NULL; } else if(full == FALSE && id) { crm_xml_add(diff, XML_ATTR_ID, id); } done: return diff; } int add_xml_object(xmlNode *parent, xmlNode *target, xmlNode *update, gboolean as_diff) { xmlNode *a_child = NULL; const char *object_id = NULL; const char *object_name = NULL; #if XML_PARSE_DEBUG crm_log_xml_trace("update:", update); crm_log_xml_trace("target:", target); #endif CRM_CHECK(update != NULL, return 0); object_name = crm_element_name(update); object_id = ID(update); CRM_CHECK(object_name != NULL, return 0); if(target == NULL && object_id == NULL) { /* placeholder object */ target = find_xml_node(parent, object_name, FALSE); } else if(target == NULL) { target = find_entity(parent, object_name, object_id); } if(target == NULL) { target = create_xml_node(parent, object_name); CRM_CHECK(target != NULL, return 0); #if XML_PARSER_DEBUG crm_trace("Added <%s%s%s/>", crm_str(object_name), object_id?" id=":"", object_id?object_id:""); } else { crm_trace("Found node <%s%s%s/> to update", crm_str(object_name), object_id?" id=":"", object_id?object_id:""); #endif } if(as_diff == FALSE) { /* So that expand_plus_plus() gets called */ copy_in_properties(target, update); } else { /* No need for expand_plus_plus(), just raw speed */ xml_prop_iter(update, p_name, p_value, /* Remove it first so the ordering of the update is preserved */ xmlUnsetProp(target, (const xmlChar*)p_name); xmlSetProp(target, (const xmlChar*)p_name, (const xmlChar*)p_value)); } for(a_child = __xml_first_child(update); a_child != NULL; a_child = __xml_next(a_child)) { #if XML_PARSER_DEBUG crm_trace("Updating child <%s id=%s>", crm_element_name(a_child), ID(a_child)); #endif add_xml_object(target, NULL, a_child, as_diff); } #if XML_PARSER_DEBUG crm_trace("Finished with <%s id=%s>", crm_str(object_name), crm_str(object_id)); #endif return 0; } gboolean update_xml_child(xmlNode *child, xmlNode *to_update) { gboolean can_update = TRUE; xmlNode *child_of_child = NULL; CRM_CHECK(child != NULL, return FALSE); CRM_CHECK(to_update != NULL, return FALSE); if(safe_str_neq(crm_element_name(to_update), crm_element_name(child))) { can_update = FALSE; } else if(safe_str_neq(ID(to_update), ID(child))) { can_update = FALSE; } else if(can_update) { #if XML_PARSER_DEBUG crm_log_xml_trace(child, "Update match found..."); #endif add_xml_object(NULL, child, to_update, FALSE); } for(child_of_child = __xml_first_child(child); child_of_child != NULL; child_of_child = __xml_next(child_of_child)) { /* only update the first one */ if(can_update) { break; } can_update = update_xml_child(child_of_child, to_update); } return can_update; } int find_xml_children(xmlNode **children, xmlNode *root, const char *tag, const char *field, const char *value, gboolean search_matches) { int match_found = 0; CRM_CHECK(root != NULL, return FALSE); CRM_CHECK(children != NULL, return FALSE); if(tag != NULL && safe_str_neq(tag, crm_element_name(root))) { } else if(value != NULL && safe_str_neq(value, crm_element_value(root, field))) { } else { if(*children == NULL) { *children = create_xml_node(NULL, __FUNCTION__); } add_node_copy(*children, root); match_found = 1; } if(search_matches || match_found == 0) { xmlNode *child = NULL; for(child = __xml_first_child(root); child != NULL; child = __xml_next(child)) { match_found += find_xml_children( children, child, tag, field, value, search_matches); } } return match_found; } gboolean replace_xml_child(xmlNode *parent, xmlNode *child, xmlNode *update, gboolean delete_only) { gboolean can_delete = FALSE; xmlNode *child_of_child = NULL; const char *up_id = NULL; const char *child_id = NULL; const char *right_val = NULL; CRM_CHECK(child != NULL, return FALSE); CRM_CHECK(update != NULL, return FALSE); up_id = ID(update); child_id = ID(child); if(up_id == NULL || safe_str_eq(child_id, up_id)) { can_delete = TRUE; } if(safe_str_neq(crm_element_name(update), crm_element_name(child))) { can_delete = FALSE; } if(can_delete && delete_only) { xml_prop_iter(update, prop_name, left_value, right_val = crm_element_value(child, prop_name); if(safe_str_neq(left_value, right_val)) { can_delete = FALSE; } ); } if(can_delete && parent != NULL) { crm_log_xml_trace(child, "Delete match found..."); if(delete_only || update == NULL) { free_xml_from_parent(NULL, child); } else { xmlNode *tmp = copy_xml(update); xmlDoc *doc = tmp->doc; xmlNode *old = xmlReplaceNode(child, tmp); free_xml_from_parent(NULL, old); xmlDocSetRootElement(doc, NULL); xmlFreeDoc(doc); } child = NULL; return TRUE; } else if(can_delete) { crm_log_xml_debug(child, "Cannot delete the search root"); can_delete = FALSE; } child_of_child = __xml_first_child(child); while(child_of_child) { xmlNode *next = __xml_next(child_of_child); can_delete = replace_xml_child(child, child_of_child, update, delete_only); /* only delete the first one */ if(can_delete) { child_of_child = NULL; } else { child_of_child = next; } } return can_delete; } void hash2nvpair(gpointer key, gpointer value, gpointer user_data) { const char *name = key; const char *s_value = value; xmlNode *xml_node = user_data; xmlNode *xml_child = create_xml_node(xml_node, XML_CIB_TAG_NVPAIR); crm_xml_add(xml_child, XML_ATTR_ID, name); crm_xml_add(xml_child, XML_NVPAIR_ATTR_NAME, name); crm_xml_add(xml_child, XML_NVPAIR_ATTR_VALUE, s_value); crm_trace("dumped: name=%s value=%s", name, s_value); } void hash2smartfield(gpointer key, gpointer value, gpointer user_data) { const char *name = key; const char *s_value = value; xmlNode *xml_node = user_data; if(isdigit(name[0])) { xmlNode *tmp = create_xml_node(xml_node, XML_TAG_PARAM); crm_xml_add(tmp, XML_NVPAIR_ATTR_NAME, name); crm_xml_add(tmp, XML_NVPAIR_ATTR_VALUE, s_value); } else if(crm_element_value(xml_node, name) == NULL) { crm_xml_add(xml_node, name, s_value); crm_trace("dumped: %s=%s", name, s_value); } else { crm_trace("duplicate: %s=%s", name, s_value); } } void hash2field(gpointer key, gpointer value, gpointer user_data) { const char *name = key; const char *s_value = value; xmlNode *xml_node = user_data; if(crm_element_value(xml_node, name) == NULL) { crm_xml_add(xml_node, name, s_value); crm_trace("dumped: %s=%s", name, s_value); } else { crm_trace("duplicate: %s=%s", name, s_value); } } void hash2metafield(gpointer key, gpointer value, gpointer user_data) { char *crm_name = NULL; if(key == NULL || value == NULL) { return; } else if(((char*)key)[0] == '#') { return; } else if(strstr(key, ":")) { return; } crm_name = crm_meta_name(key); hash2field(crm_name, value, user_data); crm_free(crm_name); } GHashTable * xml2list(xmlNode *parent) { xmlNode *child = NULL; xmlNode *nvpair_list = NULL; GHashTable *nvpair_hash = g_hash_table_new_full( crm_str_hash, g_str_equal, g_hash_destroy_str, g_hash_destroy_str); CRM_CHECK(parent != NULL, return nvpair_hash); nvpair_list = find_xml_node(parent, XML_TAG_ATTRS, FALSE); if(nvpair_list == NULL) { crm_trace("No attributes in %s", crm_element_name(parent)); crm_log_xml_trace( parent,"No attributes for resource op"); } crm_log_xml_trace(nvpair_list, "Unpacking"); xml_prop_iter( nvpair_list, key, value, crm_trace("Added %s=%s", key, value); g_hash_table_insert( nvpair_hash, crm_strdup(key), crm_strdup(value)); ); for(child = __xml_first_child(nvpair_list); child != NULL; child = __xml_next(child)) { if(crm_str_eq((const char *)child->name, XML_TAG_PARAM, TRUE)) { const char *key = crm_element_value(child, XML_NVPAIR_ATTR_NAME); const char *value = crm_element_value(child, XML_NVPAIR_ATTR_VALUE); crm_trace("Added %s=%s", key, value); if(key != NULL && value != NULL) { g_hash_table_insert(nvpair_hash, crm_strdup(key), crm_strdup(value)); } } } return nvpair_hash; } typedef struct name_value_s { const char *name; const void *value; } name_value_t; static gint sort_pairs(gconstpointer a, gconstpointer b) { int rc = 0; const name_value_t *pair_a = a; const name_value_t *pair_b = b; CRM_ASSERT(a != NULL); CRM_ASSERT(pair_a->name != NULL); CRM_ASSERT(b != NULL); CRM_ASSERT(pair_b->name != NULL); rc = strcmp(pair_a->name, pair_b->name); if(rc < 0) { return -1; } else if(rc > 0) { return 1; } return 0; } static void dump_pair(gpointer data, gpointer user_data) { name_value_t *pair = data; xmlNode *parent = user_data; crm_xml_add(parent, pair->name, pair->value); } xmlNode * sorted_xml(xmlNode *input, xmlNode *parent, gboolean recursive) { xmlNode *child = NULL; GListPtr sorted = NULL; GListPtr unsorted = NULL; name_value_t *pair = NULL; xmlNode *result = NULL; const char *name = NULL; CRM_CHECK(input != NULL, return NULL); name = crm_element_name(input); CRM_CHECK(name != NULL, return NULL); result = create_xml_node(parent, name); xml_prop_iter(input, p_name, p_value, crm_malloc0(pair, sizeof(name_value_t)); pair->name = p_name; pair->value = p_value; unsorted = g_list_prepend(unsorted, pair); pair = NULL; ); sorted = g_list_sort(unsorted, sort_pairs); g_list_foreach(sorted, dump_pair, result); slist_basic_destroy(sorted); for(child = __xml_first_child(input); child != NULL; child = __xml_next(child)) { if(recursive) { sorted_xml(child, result, recursive); } else { add_node_copy(result, child); } } return result; } static void filter_xml(xmlNode *data, filter_t *filter, int filter_len, gboolean recursive) { int lpc = 0; xmlNode *child = NULL; for(lpc = 0; lpc < filter_len; lpc++) { xml_remove_prop(data, filter[lpc].string); } if(recursive == FALSE || filter_len == 0) { return; } for(child = __xml_first_child(data); child != NULL; child = __xml_next(child)) { filter_xml(child, filter, filter_len, recursive); } } /* "c048eae664dba840e1d2060f00299e9d" */ static char * calculate_xml_digest_v1(xmlNode *input, gboolean sort, gboolean do_filter) { int i = 0; int digest_len = 16; char *digest = NULL; unsigned char *raw_digest = NULL; xmlNode *copy = NULL; char *buffer = NULL; size_t buffer_len = 0; if(sort || do_filter) { copy = sorted_xml(input, NULL, TRUE); input = copy; } if(do_filter) { filter_xml(input, filter, DIMOF(filter), TRUE); } buffer = dump_xml(input, FALSE, TRUE); buffer_len = strlen(buffer); CRM_CHECK(buffer != NULL && buffer_len > 0, free_xml(copy); crm_free(buffer); return NULL); crm_malloc(digest, (2 * digest_len + 1)); crm_malloc(raw_digest, (digest_len + 1)); MD5((unsigned char *)buffer, buffer_len, raw_digest); for(i = 0; i < digest_len; i++) { sprintf(digest+(2*i), "%02x", raw_digest[i]); } digest[(2*digest_len)] = 0; crm_trace("Digest %s: %s\n", digest, buffer); crm_log_xml_trace(copy, "digest:source"); crm_free(buffer); crm_free(raw_digest); free_xml(copy); return digest; } static char * calculate_xml_digest_v2(xmlNode *input, gboolean do_filter) { int i = 0; int digest_len = 16; char *digest = NULL; size_t buffer_len = 0; int filter_size = DIMOF(filter); unsigned char *raw_digest = NULL; xmlDoc *doc = NULL; xmlNode *copy = NULL; xmlBuffer *xml_buffer = NULL; if(do_filter && BEST_EFFORT_STATUS) { /* Exclude the status calculation from the digest * * This doesn't mean it wont be sync'd, we just wont be paranoid * about it being an _exact_ copy * * We don't need it to be exact, since we throw it away and regenerate * from our peers whenever a new DC is elected anyway * * Importantly, this reduces the amount of XML to copy+export as * well as the amount of data for MD5 needs to operate on */ xmlNode *child = NULL; copy = create_xml_node(NULL, XML_TAG_CIB); xml_prop_iter(input, p_name, p_value, xmlSetProp(copy, (const xmlChar*)p_name, (const xmlChar*)p_value)); xml_remove_prop(copy, XML_ATTR_ORIGIN); xml_remove_prop(copy, XML_CIB_ATTR_WRITTEN); /* We just did all the filtering */ for(child = __xml_first_child(input); child != NULL; child = __xml_next(child)) { if(safe_str_neq(crm_element_name(child), XML_CIB_TAG_STATUS)) { add_node_copy(copy, child); } } } else if(do_filter) { copy = copy_xml(input); filter_xml(copy, filter, filter_size, TRUE); input = copy; } doc = getDocPtr(input); xml_buffer = xmlBufferCreate(); CRM_ASSERT(xml_buffer != NULL); CRM_CHECK(doc != NULL, return NULL); /* doc will only be NULL if an_xml_node is */ buffer_len = xmlNodeDump(xml_buffer, doc, input, 0, FALSE); CRM_CHECK(xml_buffer->content != NULL && buffer_len > 0, goto done); crm_malloc(digest, (2 * digest_len + 1)); crm_malloc(raw_digest, (digest_len + 1)); MD5((unsigned char *)xml_buffer->content, buffer_len, raw_digest); for(i = 0; i < digest_len; i++) { sprintf(digest+(2*i), "%02x", raw_digest[i]); } digest[(2*digest_len)] = 0; crm_trace("Digest %s\n", digest); #if LIBQB_LOGGING { static struct qb_log_callsite *digest_cs = NULL; if(digest_cs == NULL) { qb_log_callsite_get(__func__, __FILE__, "xml-blog", LOG_TRACE, __LINE__, 0); } if (digest_cs && digest_cs->targets) { FILE *st = NULL; char *trace_file = crm_concat("/tmp/cib-digest", digest, '-'); crm_trace("Saving %s.%s.%s to %s", crm_element_value(input, XML_ATTR_GENERATION_ADMIN), crm_element_value(input, XML_ATTR_GENERATION), crm_element_value(input, XML_ATTR_NUMUPDATES), trace_file); st = fopen(trace_file, "w"); if(st) { fprintf(st, "%s", xml_buffer->content); /* fflush(st); */ /* fsync(fileno(st)); */ fclose(st); } crm_free(trace_file); } } #endif done: xmlBufferFree(xml_buffer); crm_free(raw_digest); free_xml(copy); return digest; } char * calculate_on_disk_digest(xmlNode *input) { /* Always use the v1 format for on-disk digests * a) its a compatability nightmare * b) we only use this once at startup, all other * invocations are in a separate child process */ return calculate_xml_digest_v1(input, FALSE, FALSE); } char * calculate_operation_digest(xmlNode *input, const char *version) { /* We still need the sorting for parameter digests */ return calculate_xml_digest_v1(input, TRUE, FALSE); } char * calculate_xml_digest(xmlNode *input, gboolean sort, gboolean do_filter) { return calculate_xml_digest_v1(input, sort, do_filter); } char * calculate_xml_versioned_digest(xmlNode *input, gboolean sort, gboolean do_filter, const char *version) { /* * The sorting associated with v1 digest creation accounted for 23% of * the CIB's CPU usage on the server. v2 drops this. * * The filtering accounts for an additional 2.5% and we may want to * remove it in future. * * v2 also uses the xmlBuffer contents directly to avoid additional copying */ if(version == NULL || compare_version("3.0.5", version) > 0) { crm_trace("Using v1 digest algorithm for %s", crm_str(version)); return calculate_xml_digest_v1(input, sort, do_filter); } crm_trace("Using v2 digest algorithm for %s", crm_str(version)); return calculate_xml_digest_v2(input, do_filter); } static gboolean validate_with_dtd( xmlDocPtr doc, gboolean to_logs, const char *dtd_file) { gboolean valid = TRUE; xmlDtdPtr dtd = NULL; xmlValidCtxtPtr cvp = NULL; CRM_CHECK(doc != NULL, return FALSE); CRM_CHECK(dtd_file != NULL, return FALSE); dtd = xmlParseDTD(NULL, (const xmlChar *)dtd_file); CRM_CHECK(dtd != NULL, crm_err("Could not find/parse %s", dtd_file); goto cleanup); cvp = xmlNewValidCtxt(); CRM_CHECK(cvp != NULL, goto cleanup); if(to_logs) { cvp->userData = (void *) LOG_ERR; cvp->error = (xmlValidityErrorFunc) xml_log; cvp->warning = (xmlValidityWarningFunc) xml_log; } else { cvp->userData = (void *) stderr; cvp->error = (xmlValidityErrorFunc) fprintf; cvp->warning = (xmlValidityWarningFunc) fprintf; } if (!xmlValidateDtd(cvp, doc, dtd)) { valid = FALSE; } cleanup: if(cvp) { xmlFreeValidCtxt(cvp); } if(dtd) { xmlFreeDtd(dtd); } return valid; } xmlNode *first_named_child(xmlNode *parent, const char *name) { xmlNode *match = NULL; for(match = __xml_first_child(parent); match != NULL; match = __xml_next(match)) { /* * name == NULL gives first child regardless of name; this is * semantically incorrect in this funciton, but may be necessary * due to prior use of xml_child_iter_filter */ if(name == NULL || crm_str_eq((const char*)match->name, name, TRUE)) { return match; } } return NULL; } #if 0 static void relaxng_invalid_stderr(void * userData, xmlErrorPtr error) { /* Structure xmlError struct _xmlError { int domain : What part of the library raised this er int code : The error code, e.g. an xmlParserError char * message : human-readable informative error messag xmlErrorLevel level : how consequent is the error char * file : the filename int line : the line number if available char * str1 : extra string information char * str2 : extra string information char * str3 : extra string information int int1 : extra number information int int2 : column number of the error or 0 if N/A void * ctxt : the parser context if available void * node : the node in the tree } */ crm_err("Structured error: line=%d, level=%d %s", error->line, error->level, error->message); } #endif static gboolean validate_with_relaxng( xmlDocPtr doc, gboolean to_logs, const char *relaxng_file, relaxng_ctx_cache_t **cached_ctx) { int rc = 0; gboolean valid = TRUE; relaxng_ctx_cache_t *ctx = NULL; CRM_CHECK(doc != NULL, return FALSE); CRM_CHECK(relaxng_file != NULL, return FALSE); if(cached_ctx && *cached_ctx) { ctx = *cached_ctx; } else { crm_info("Creating RNG parser context"); crm_malloc0(ctx, sizeof(relaxng_ctx_cache_t)); xmlLoadExtDtdDefaultValue = 1; ctx->parser = xmlRelaxNGNewParserCtxt(relaxng_file); CRM_CHECK(ctx->parser != NULL, goto cleanup); if(to_logs) { xmlRelaxNGSetParserErrors(ctx->parser, (xmlRelaxNGValidityErrorFunc) xml_log, (xmlRelaxNGValidityWarningFunc) xml_log, GUINT_TO_POINTER(LOG_ERR)); } else { xmlRelaxNGSetParserErrors(ctx->parser, (xmlRelaxNGValidityErrorFunc) fprintf, (xmlRelaxNGValidityWarningFunc) fprintf, stderr); } ctx->rng = xmlRelaxNGParse(ctx->parser); CRM_CHECK(ctx->rng != NULL, crm_err("Could not find/parse %s", relaxng_file); goto cleanup); ctx->valid = xmlRelaxNGNewValidCtxt(ctx->rng); CRM_CHECK(ctx->valid != NULL, goto cleanup); if(to_logs) { xmlRelaxNGSetValidErrors(ctx->valid, (xmlRelaxNGValidityErrorFunc) xml_log, (xmlRelaxNGValidityWarningFunc) xml_log, GUINT_TO_POINTER(LOG_ERR)); } else { xmlRelaxNGSetValidErrors(ctx->valid, (xmlRelaxNGValidityErrorFunc) fprintf, (xmlRelaxNGValidityWarningFunc) fprintf, stderr); } } /* xmlRelaxNGSetValidStructuredErrors( */ /* valid, relaxng_invalid_stderr, valid); */ xmlLineNumbersDefault(1); rc = xmlRelaxNGValidateDoc(ctx->valid, doc); if (rc > 0) { valid = FALSE; } else if (rc < 0) { crm_err("Internal libxml error during validation\n"); } cleanup: if(cached_ctx) { *cached_ctx = ctx; } else { if(ctx->parser != NULL) { xmlRelaxNGFreeParserCtxt(ctx->parser); } if(ctx->valid != NULL) { xmlRelaxNGFreeValidCtxt(ctx->valid); } if (ctx->rng != NULL) { xmlRelaxNGFree(ctx->rng); } crm_free(ctx); } return valid; } void crm_xml_cleanup(void) { int lpc = 0; relaxng_ctx_cache_t *ctx = NULL; crm_info("Cleaning up memory from libxml2"); for(; lpc < all_schemas; lpc++) { switch(known_schemas[lpc].type) { case 0: /* None */ break; case 1: /* DTD - Not cached */ break; case 2: /* RNG - Cached */ ctx = (relaxng_ctx_cache_t *)known_schemas[lpc].cache; if(ctx == NULL) { break; } if(ctx->parser != NULL) { xmlRelaxNGFreeParserCtxt(ctx->parser); } if(ctx->valid != NULL) { xmlRelaxNGFreeValidCtxt(ctx->valid); } if (ctx->rng != NULL) { xmlRelaxNGFree(ctx->rng); } crm_free(ctx); known_schemas[lpc].cache = NULL; break; default: break; } } xmlCleanupParser(); } static gboolean validate_with(xmlNode *xml, int method, gboolean to_logs) { xmlDocPtr doc = NULL; gboolean valid = FALSE; int type = known_schemas[method].type; char *file = NULL; CRM_CHECK(xml != NULL, return FALSE); doc = getDocPtr(xml); file = get_schema_path(known_schemas[method].location); crm_trace("Validating with: %s (type=%d)", crm_str(file), type); switch(type) { case 0: valid = TRUE; break; case 1: valid = validate_with_dtd(doc, to_logs, file); break; case 2: valid = validate_with_relaxng(doc, to_logs, file, (relaxng_ctx_cache_t**)&(known_schemas[method].cache)); break; default: crm_err("Unknown validator type: %d", type); break; } crm_free(file); return valid; } #include static void dump_file(const char *filename) { FILE *fp = NULL; int ch, line = 0; CRM_CHECK(filename != NULL, return); fp = fopen(filename, "r"); CRM_CHECK(fp != NULL, return); fprintf(stderr, "%4d ", ++line); do { ch = getc(fp); if(ch == EOF) { putc('\n', stderr); break; } else if(ch == '\n') { fprintf(stderr, "\n%4d ", ++line); } else { putc(ch, stderr); } } while(1); fclose(fp); } gboolean validate_xml_verbose(xmlNode *xml_blob) { xmlDoc *doc = NULL; xmlNode *xml = NULL; gboolean rc = FALSE; char *filename = NULL; static char *template = NULL; if(template == NULL) { template = crm_strdup(CRM_STATE_DIR"/cib-invalid.XXXXXX"); } filename = mktemp(template); write_xml_file(xml_blob, filename, FALSE); dump_file(filename); doc = xmlParseFile(filename); xml = xmlDocGetRootElement(doc); rc = validate_xml(xml, NULL, FALSE); free_xml(xml); return rc; } gboolean validate_xml(xmlNode *xml_blob, const char *validation, gboolean to_logs) { int lpc = 0; if(validation == NULL) { validation = crm_element_value(xml_blob, XML_ATTR_VALIDATION); } if(validation == NULL) { validation = crm_element_value(xml_blob, "ignore-dtd"); if(crm_is_true(validation)) { validation = "none"; } else { validation = "pacemaker-1.0"; } } if(safe_str_eq(validation, "none")) { return TRUE; } for(; lpc < all_schemas; lpc++) { if(safe_str_eq(validation, known_schemas[lpc].name)) { return validate_with(xml_blob, lpc, to_logs); } } crm_err("Unknown validator: %s", validation); return FALSE; } #if HAVE_LIBXSLT static xmlNode *apply_transformation(xmlNode *xml, const char *transform) { char *xform = NULL; xmlNode *out = NULL; xmlDocPtr res = NULL; xmlDocPtr doc = NULL; xsltStylesheet *xslt = NULL; CRM_CHECK(xml != NULL, return FALSE); doc = getDocPtr(xml); xform = get_schema_path(transform); xmlLoadExtDtdDefaultValue = 1; xmlSubstituteEntitiesDefault(1); xslt = xsltParseStylesheetFile((const xmlChar *)xform); CRM_CHECK(xslt != NULL, goto cleanup); res = xsltApplyStylesheet(xslt, doc, NULL); CRM_CHECK(res != NULL, goto cleanup); out = xmlDocGetRootElement(res); cleanup: if(xslt) { xsltFreeStylesheet(xslt); } xsltCleanupGlobals(); xmlCleanupParser(); crm_free(xform); return out; } #endif const char *get_schema_name(int version) { if(version < 0 || version >= all_schemas) { return "unknown"; } return known_schemas[version].name; } int get_schema_version(const char *name) { int lpc = 0; for(; lpc < all_schemas; lpc++) { if(safe_str_eq(name, known_schemas[lpc].name)) { return lpc; } } return -1; } /* set which validation to use */ #include int update_validation( xmlNode **xml_blob, int *best, gboolean transform, gboolean to_logs) { xmlNode *xml = NULL; char *value = NULL; int lpc = 0, match = -1, rc = cib_ok; CRM_CHECK(best != NULL, return cib_invalid_argument); CRM_CHECK(xml_blob != NULL, return cib_invalid_argument); CRM_CHECK(*xml_blob != NULL, return cib_invalid_argument); *best = 0; xml = *xml_blob; value = crm_element_value_copy(xml, XML_ATTR_VALIDATION); if(value != NULL) { match = get_schema_version(value); lpc = match; if(lpc >= 0 && transform == FALSE) { lpc++; } else if(lpc < 0) { crm_debug("Unknown validation type"); lpc = 0; } } if(match >= max_schemas) { /* nothing to do */ crm_free(value); *best = match; return cib_ok; } for(; lpc < max_schemas; lpc++) { gboolean valid = TRUE; crm_debug("Testing '%s' validation", known_schemas[lpc].name?known_schemas[lpc].name:""); valid = validate_with(xml, lpc, to_logs); if(valid) { *best = lpc; } if(valid && transform) { xmlNode *upgrade = NULL; int next = known_schemas[lpc].after_transform; if(next <= 0) { next = lpc+1; } crm_notice("Upgrading %s-style configuration to %s with %s", known_schemas[lpc].name, known_schemas[next].name, known_schemas[lpc].transform?known_schemas[lpc].transform:"no-op"); if(known_schemas[lpc].transform == NULL) { if(validate_with(xml, next, to_logs)) { crm_debug("Configuration valid for schema: %s", known_schemas[next].name); lpc = next; *best = next; rc = cib_ok; } else { crm_info("Configuration not valid for schema: %s", known_schemas[next].name); } } else { #if HAVE_LIBXSLT upgrade = apply_transformation(xml, known_schemas[lpc].transform); #endif if(upgrade == NULL) { crm_err("Transformation %s failed", known_schemas[lpc].transform); rc = cib_transform_failed; } else if(validate_with(upgrade, next, to_logs)) { crm_info("Transformation %s successful", known_schemas[lpc].transform); lpc = next; *best = next; free_xml(xml); xml = upgrade; rc = cib_ok; } else { crm_err("Transformation %s did not produce a valid configuration", known_schemas[lpc].transform); crm_log_xml_info(upgrade, "transform:bad"); free_xml(upgrade); rc = cib_dtd_validation; } } } } if(*best > match) { crm_notice("Upgraded from %s to %s validation", value?value:"", known_schemas[*best].name); crm_xml_add(xml, XML_ATTR_VALIDATION, known_schemas[*best].name); } *xml_blob = xml; crm_free(value); return rc; } xmlNode * getXpathResult(xmlXPathObjectPtr xpathObj, int index) { xmlNode *match = NULL; CRM_CHECK(index >= 0, return NULL); CRM_CHECK(xpathObj != NULL, return NULL); if(index >= xpathObj->nodesetval->nodeNr) { crm_err("Requested index %d of only %d items", index, xpathObj->nodesetval->nodeNr); return NULL; } match = xpathObj->nodesetval->nodeTab[index]; CRM_CHECK(match != NULL, return NULL); /* * From xpath2.c * * All the elements returned by an XPath query are pointers to * elements from the tree *except* namespace nodes where the XPath * semantic is different from the implementation in libxml2 tree. * As a result when a returned node set is freed when * xmlXPathFreeObject() is called, that routine must check the * element type. But node from the returned set may have been removed * by xmlNodeSetContent() resulting in access to freed data. * This can be exercised by running * valgrind xpath2 test3.xml '//discarded' discarded * There is 2 ways around it: * - make a copy of the pointers to the nodes from the result set * then call xmlXPathFreeObject() and then modify the nodes * or * - remove the reference to the modified nodes from the node set * as they are processed, if they are not namespace nodes. */ if (xpathObj->nodesetval->nodeTab[index]->type != XML_NAMESPACE_DECL) { xpathObj->nodesetval->nodeTab[index] = NULL; } if(match->type == XML_DOCUMENT_NODE) { /* Will happen if section = '/' */ match = match->children; } else if(match->type != XML_ELEMENT_NODE && match->parent && match->parent->type == XML_ELEMENT_NODE) { /* reurning the parent instead */ match = match->parent; } else if(match->type != XML_ELEMENT_NODE) { /* We only support searching nodes */ crm_err("We only support %d not %d", XML_ELEMENT_NODE, match->type); match = NULL; } return match; } /* the caller needs to check if the result contains a xmlDocPtr or xmlNodePtr */ xmlXPathObjectPtr xpath_search(xmlNode *xml_top, const char *path) { xmlDocPtr doc = NULL; xmlXPathObjectPtr xpathObj = NULL; xmlXPathContextPtr xpathCtx = NULL; const xmlChar *xpathExpr = (const xmlChar *)path; CRM_CHECK(path != NULL, return NULL); CRM_CHECK(xml_top != NULL, return NULL); CRM_CHECK(strlen(path) > 0, return NULL); doc = getDocPtr(xml_top); crm_trace("Evaluating: %s", path); xpathCtx = xmlXPathNewContext(doc); CRM_ASSERT(xpathCtx != NULL); xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx); xmlXPathFreeContext(xpathCtx); return xpathObj; } gboolean cli_config_update(xmlNode **xml, int *best_version, gboolean to_logs) { gboolean rc = TRUE; static int min_version = -1; static int max_version = -1; const char *value = crm_element_value(*xml, XML_ATTR_VALIDATION); int version = get_schema_version(value); if(min_version < 0) { min_version = get_schema_version(MINIMUM_SCHEMA_VERSION); } if(max_version < 0) { max_version = get_schema_version(LATEST_SCHEMA_VERSION); } if(version < min_version) { xmlNode *converted = NULL; converted = copy_xml(*xml); update_validation(&converted, &version, TRUE, to_logs); value = crm_element_value(converted, XML_ATTR_VALIDATION); if(version < min_version) { if(to_logs) { crm_config_err("Your current configuration could only be upgraded to %s... " "the minimum requirement is %s.\n", crm_str(value), MINIMUM_SCHEMA_VERSION); } else { fprintf(stderr, "Your current configuration could only be upgraded to %s... " "the minimum requirement is %s.\n", crm_str(value), MINIMUM_SCHEMA_VERSION); } free_xml(converted); converted = NULL; rc = FALSE; } else { free_xml(*xml); *xml = converted; if(version < max_version) { crm_config_warn("Your configuration was internally updated to %s... " "which is acceptable but not the most recent", get_schema_name(version)); } else if(to_logs){ crm_info("Your configuration was internally updated to the latest version (%s)", get_schema_name(version)); } } } else if(version > max_version) { if(to_logs){ crm_config_warn("Configuration validation is currently disabled." " It is highly encouraged and prevents many common cluster issues."); } else { fprintf(stderr, "Configuration validation is currently disabled." " It is highly encouraged and prevents many common cluster issues.\n"); } } if(best_version) { *best_version = version; } return rc; } xmlNode *expand_idref(xmlNode *input, xmlNode *top) { const char *tag = NULL; const char *ref = NULL; xmlNode *result = input; char *xpath_string = NULL; if(result == NULL) { return NULL; } else if(top == NULL) { top = input; } tag = crm_element_name(result); ref = crm_element_value(result, XML_ATTR_IDREF); if(ref != NULL) { int xpath_max = 512, offset = 0; crm_malloc0(xpath_string, xpath_max); offset += snprintf(xpath_string + offset, xpath_max - offset, "//%s[@id='%s']", tag, ref); result = get_xpath_object(xpath_string, top, LOG_ERR); if(result == NULL) { char *nodePath = (char *)xmlGetNodePath(top); crm_err("No match for %s found in %s: Invalid configuration", xpath_string, crm_str(nodePath)); crm_free(nodePath); } } crm_free(xpath_string); return result; } xmlNode* get_xpath_object_relative(const char *xpath, xmlNode *xml_obj, int error_level) { int len = 0; xmlNode *result = NULL; char *xpath_full = NULL; char *xpath_prefix = NULL; if(xml_obj == NULL || xpath == NULL) { return NULL; } xpath_prefix = (char *)xmlGetNodePath(xml_obj); len += strlen(xpath_prefix); len += strlen(xpath); xpath_full = crm_strdup(xpath_prefix); crm_realloc(xpath_full, len+1); strncat(xpath_full, xpath, len); result = get_xpath_object(xpath_full, xml_obj, error_level); crm_free(xpath_prefix); crm_free(xpath_full); return result; } xmlNode* get_xpath_object(const char *xpath, xmlNode *xml_obj, int error_level) { xmlNode *result = NULL; xmlXPathObjectPtr xpathObj = NULL; char *nodePath = NULL; char *matchNodePath = NULL; if(xpath == NULL) { return xml_obj; /* or return NULL? */ } xpathObj = xpath_search(xml_obj, xpath); nodePath = (char *)xmlGetNodePath(xml_obj); if(xpathObj == NULL || xpathObj->nodesetval == NULL || xpathObj->nodesetval->nodeNr < 1) { do_crm_log(error_level, "No match for %s in %s", xpath, crm_str(nodePath)); crm_log_xml_trace(xml_obj, "Unexpected Input"); } else if(xpathObj->nodesetval->nodeNr > 1) { int lpc = 0, max = xpathObj->nodesetval->nodeNr; do_crm_log(error_level, "Too many matches for %s in %s", xpath, crm_str(nodePath)); for(lpc = 0; lpc < max; lpc++) { xmlNode *match = getXpathResult(xpathObj, lpc); CRM_CHECK(match != NULL, continue); matchNodePath = (char *)xmlGetNodePath(match); do_crm_log(error_level, "%s[%d] = %s", xpath, lpc, crm_str(matchNodePath)); crm_free(matchNodePath); } crm_log_xml_trace(xml_obj, "Bad Input"); } else { result = getXpathResult(xpathObj, 0); } if(xpathObj) { xmlXPathFreeObject(xpathObj); } crm_free(nodePath); return result; } const char * crm_element_value(xmlNode *data, const char *name) { xmlAttr *attr = NULL; if(data == NULL) { crm_err("Couldn't find %s in NULL", name?name:""); return NULL; } else if(name == NULL) { crm_err("Couldn't find NULL in %s", crm_element_name(data)); return NULL; } attr = xmlHasProp(data, (const xmlChar*)name); if(attr == NULL || attr->children == NULL) { return NULL; } return (const char*)attr->children->content; }