//!
//! Do a clone of an instance backing store to another location.
//!
//! @param[in] instance pointer to the instance
//! @param[in] filePrefix the
//! @param[in] blockPath the path where we need to clone
//!
//! @return EUCA_OK on success or the following error codes:
//! \li EUCA_IO_ERROR: if we fail to copy the data.
//! \li EUCA_NOT_FOUND_ERROR: if we cannot find the blobstore to clone.
//! \li EUCA_PERMISSION_ERROR: if we fail to create/open the destination blobstore
//!
//! @pre \li The instance parameter must not be NULL.
//! \li The filePrefix and blockPath parameters must not be NULL and should be valid strings.
//!
//! @note
//!
int clone_bundling_backing(ncInstance * instance, const char *filePrefix, char *blockPath)
{
int ret = EUCA_OK;
int found = -1;
char path[EUCA_MAX_PATH] = "";
char work_regex[1024] = "";
char id[BLOBSTORE_MAX_PATH] = "";
char workPath[BLOBSTORE_MAX_PATH] = "";
blockblob *src_blob = NULL;
blockblob *dest_blob = NULL;
blockblob *bb = NULL;
blockblob_meta *bm = NULL;
blockblob_meta *next = NULL;
blockblob_meta *matches = NULL;
set_path(path, sizeof(path), instance, NULL);
set_id2(instance, "/.*", work_regex, sizeof(work_regex));
if ((found = blobstore_search(work_bs, work_regex, &matches) <= 0)) {
LOGERROR("[%s] failed to find blob in %s %d\n", instance->instanceId, path, found);
return (EUCA_NOT_FOUND_ERROR);
}
for (bm = matches; bm; bm = bm->next) {
bb = blockblob_open(work_bs, bm->id, 0, 0, NULL, FIND_TIMEOUT_USEC);
if ((bb != NULL) && (bb->snapshot_type == BLOBSTORE_SNAPSHOT_DM) && (strstr(bb->blocks_path, "emi-") != NULL)) {
// root image contains substr 'emi-'
src_blob = bb;
break;
} else if (bb != NULL) {
blockblob_close(bb);
}
}
if (!src_blob) {
LOGERROR("[%s] couldn't find the blob to clone from", instance->instanceId);
ret = EUCA_NOT_FOUND_ERROR;
goto error;
}
set_id(instance, NULL, workPath, sizeof(workPath));
snprintf(id, sizeof(id), "%s/bundle/%s", workPath, filePrefix);
// open destination blob
dest_blob = blockblob_open(work_bs, id, src_blob->size_bytes, BLOBSTORE_FLAG_CREAT | BLOBSTORE_FLAG_EXCL, NULL, FIND_TIMEOUT_USEC);
if (!dest_blob) {
LOGERROR("[%s] couldn't create the destination blob for bundling (%s)", instance->instanceId, id);
ret = EUCA_PERMISSION_ERROR;
goto error;
}
if (strlen(dest_blob->blocks_path) > 0)
snprintf(blockPath, EUCA_MAX_PATH, "%s", dest_blob->blocks_path);
// copy blob (will 'dd' eventually)
if (blockblob_copy(src_blob, 0, dest_blob, 0, src_blob->size_bytes) != EUCA_OK) {
LOGERROR("[%s] couldn't copy block blob for bundling (%s)", instance->instanceId, id);
ret = EUCA_IO_ERROR;
goto error;
}
error:
// free the search results
for (bm = matches; bm; bm = next) {
next = bm->next;
EUCA_FREE(bm);
}
// Close our blockblobs
BLOCKBLOB_CLOSE(src_blob);
BLOCKBLOB_CLOSE(dest_blob);
return (ret);
}
int clone_bundling_backing (ncInstance *instance, const char* filePrefix, char* blockPath)
{
char path[MAX_PATH];
char work_regex [1024];
char id [BLOBSTORE_MAX_PATH];
char workPath [BLOBSTORE_MAX_PATH];
int ret = OK;
int found=-1;
blockblob *src_blob = NULL, *dest_blob = NULL;
blockblob_meta *matches = NULL;
set_path (path, sizeof (path), instance, NULL);
set_id2 (instance, "/.*", work_regex, sizeof (work_regex));
if( (found=blobstore_search (work_bs, work_regex, &matches) <= 0 ) ) {
logprintfl (EUCAERROR, "[%s] error: failed to find blob in %s %d\n", instance->instanceId, path, found);
return ERROR;
}
for (blockblob_meta * bm = matches; bm; bm=bm->next) {
blockblob * bb = blockblob_open (work_bs, bm->id, 0, 0, NULL, FIND_TIMEOUT_USEC);
if (bb!=NULL && bb->snapshot_type == BLOBSTORE_SNAPSHOT_DM && strstr(bb->blocks_path,"emi-") != NULL) { // root image contains substr 'emi-'
src_blob = bb;
break;
} else if (bb!=NULL) {
blockblob_close(bb);
}
}
if (!src_blob) {
logprintfl (EUCAERROR, "[%s] couldn't find the blob to clone from", instance->instanceId);
goto error;
}
set_id (instance, NULL, workPath, sizeof (workPath));
snprintf (id, sizeof(id), "%s/%s", workPath, filePrefix);
// open destination blob
dest_blob = blockblob_open (work_bs, id, src_blob->size_bytes, BLOBSTORE_FLAG_CREAT | BLOBSTORE_FLAG_EXCL, NULL, FIND_TIMEOUT_USEC);
if (!dest_blob) {
logprintfl (EUCAERROR, "[%s] couldn't create the destination blob for bundling (%s)", instance->instanceId, id);
goto error;
}
if (strlen (dest_blob->blocks_path) > 0)
snprintf (blockPath, MAX_PATH, "%s", dest_blob->blocks_path);
// copy blob (will 'dd' eventually)
if (blockblob_copy (src_blob, 0, dest_blob, 0, src_blob->size_bytes) != OK) {
logprintfl (EUCAERROR, "[%s] couldn't copy block blob for bundling (%s)", instance->instanceId, id);
goto error;
}
goto free;
error:
ret = ERROR;
free:
// free the search results
for (blockblob_meta * bm = matches; bm;) {
blockblob_meta * next = bm->next;
free (bm);
bm = next;
}
if(src_blob)
blockblob_close(src_blob);
if(dest_blob)
blockblob_close(dest_blob);
return ret;
}