int ploop_di_add_image(struct ploop_disk_images_data *di, const char *fname,
const char *guid, const char *parent_guid)
{
int ret;
char *top_guid;
top_guid = strdup(guid);
if (top_guid == NULL)
return SYSEXIT_MALLOC;
ret = ploop_add_image_entry(di, fname, guid);
if (ret) {
free(top_guid);
return ret;
}
ret = ploop_add_snapshot_entry(di, guid, parent_guid, 0);
if (ret) {
free(top_guid);
return ret;
}
ploop_log(3, "Adding snapshot %s", guid);
free(di->top_guid);
di->top_guid = top_guid;
return 0;
}
static int parse_xml(const char *basedir, xmlNode *root_node, struct ploop_disk_images_data *di)
{
xmlNode *cur_node, *node;
char image[PATH_MAX];
const char *data = NULL;
const char *file = NULL;
const char *guid = NULL;
const char *parent_guid = NULL;
__u64 val;
int is_preallocated = 0;
int mode = PLOOP_EXPANDED_MODE;
int n;
cur_node = seek(root_node, "/Disk_Parameters");
ERR(cur_node, "/Disk_Parameters");
node = seek(cur_node, "Disk_size");
if (node != NULL) {
data = get_element_txt(node);
if (parse_ul(data, &val) == 0)
di->size = val;
}
node = seek(cur_node, "Max_delta_size");
if (node != NULL) {
data = get_element_txt(node);
if (parse_ul(data, &val) == 0)
di->max_delta_size = val;
}
node = seek(cur_node, "Cylinders");
if (node != NULL) {
data = get_element_txt(node);
if (parse_ul(data, &val) == 0)
di->cylinders = (unsigned)val;
}
node = seek(cur_node, "Heads");
if (node != NULL) {
data = get_element_txt(node);
if (parse_ul(data, &val) == 0)
di->heads = (unsigned)val;
}
node = seek(cur_node, "Sectors");
if (node != NULL) {
data = get_element_txt(node);
if (parse_ul(data, &val) == 0)
di->sectors= (unsigned)val;
}
cur_node = seek(root_node, "/StorageData/Storage");
ERR(cur_node, "/StorageData/Storage");
for (n = 0; cur_node; cur_node = cur_node->next, n++) {
if (cur_node->type != XML_ELEMENT_NODE)
continue;
if (n > 0) {
ploop_err(0, "Invalid disk descriptor file format:"
" splitted disk is not supported");
return -1;
}
node = seek(cur_node, "Blocksize");
if (node != NULL) {
data = get_element_txt(node);
if (parse_ul(data, &val)) {
ploop_err(0, "Invalid disk descriptor file format:"
" Invalid Blocksize %s", data);
return -1;
}
di->blocksize = (unsigned)val;
}
node = seek(cur_node, "Preallocated");
if (node != NULL) {
data = get_element_txt(node);
if (parse_ul(data, &val) != 0 || val > 1) {
ploop_err(0, "Invalid disk descriptor file format:"
" Invalid Preallocated tag");
return -1;
}
is_preallocated = val;
}
}
cur_node = seek(root_node, "/StorageData/Storage/Image");
ERR(cur_node, "/StorageData/Storage/Image");
for (; cur_node; cur_node = cur_node->next) {
if (cur_node->type != XML_ELEMENT_NODE)
continue;
guid = NULL;
node = seek(cur_node, "GUID");
if (node != NULL) {
guid = get_element_txt(node);
if (guid == NULL)
guid = "";
}
ERR(guid, "GUID");
node = seek(cur_node, "Type");
if (node != NULL) {
data = get_element_txt(node);
if (data != NULL && !strcmp(data, "Plain"))
mode = PLOOP_RAW_MODE;
}
file = NULL;
node = seek(cur_node, "File");
if (node != NULL) {
file = get_element_txt(node);
if (file != NULL) {
if (basedir[0] != 0 && file[0] != '/')
snprintf(image, sizeof(image), "%s%s", basedir, file);
else
snprintf(image, sizeof(image), "%s", file);
}
}
ERR(file, "File");
if (ploop_add_image_entry(di, image, guid))
return -1;
}
if (is_preallocated) {
if (mode == PLOOP_RAW_MODE) {
ploop_err(0, "Invalid disk descriptor file format:"
" Preallocated is not compatible with Plain image");
return -1;
}
di->mode = PLOOP_EXPANDED_PREALLOCATED_MODE;
} else {
di->mode = mode;
}
cur_node = seek(root_node, "/Snapshots");
ERR(cur_node, "/Snapshots");
node = seek(cur_node, "TopGUID");
if (node != NULL) {
data = get_element_txt(node);
ERR(data, "TopGUID");
di->top_guid = strdup(data);
}
cur_node = seek(root_node, "/Snapshots/Shot");
if (cur_node != NULL) {
for (; cur_node; cur_node = cur_node->next) {
int temporary = 0;
if (cur_node->type != XML_ELEMENT_NODE)
continue;
guid = NULL;
node = seek(cur_node, "GUID");
if (node != NULL)
guid = get_element_txt(node);
ERR(guid, "Snapshots GUID");
parent_guid = NULL;
node = seek(cur_node, "ParentGUID");
if (node != NULL)
parent_guid = get_element_txt(node);
ERR(parent_guid, "ParentGUID");
node = seek(cur_node, "Temporary");
if (node != NULL)
temporary = 1;
if (ploop_add_snapshot_entry(di, guid, parent_guid, temporary))
return -1;
}
}
return 0;
}