//!
//! Refactored logic for detaching a local iSCSI device and unexporting the volume. To be invoked only by other functions in this file after acquiring the necessary lock.
//!
//! @param[in] sc_url - The URL to reach the cluster's SC at.
//! @param[in] use_ws_sec - boolean to determine use of WS-SEC.
//! @param[in] ws_sec_policy_file - Policy file path for WS-SEC
//! @param[in] vol_data - The ebs_volume_data struct pointer
//! @param[in] connect_string - The connection string to use for local connection
//! @param[in] local_ip - The local host's external IP
//! @param[in] local_iqn - The local host's IQN
//! @param[in] do_rescan - Set to false to indicate no rescan should be done on disconnect, or true to use rescan
//!
//! @return EUCA_OK on success, EUCA_ERROR on failure
//!
//! @pre
//!
//! @post
//!
//! @note should be invoked only by functions in this file that acquired the necessary lock.
//!
static int cleanup_volume_attachment(char *sc_url, int use_ws_sec, char *ws_sec_policy_file, ebs_volume_data * vol_data, char *connect_string, char *local_ip, char *local_iqn,
int do_rescan)
{
int rc = 0;
char *reencrypted_token = NULL;
char *refreshedDev = NULL;
if (vol_data == NULL || connect_string == NULL || local_ip == NULL || local_iqn == NULL) {
LOGERROR("Cannot cleanup volume attachment. Got NULL input parameters.\n");
return EUCA_ERROR;
}
LOGDEBUG("[%s] attempting to disconnect iscsi target\n", vol_data->volumeId);
if (disconnect_iscsi_target(connect_string, do_rescan) != 0) {
LOGERROR("[%s] failed to disconnect iscsi target\n", vol_data->volumeId);
LOGDEBUG("Skipping SC Call due to previous errors\n");
return EUCA_ERROR;
}
if (sc_url == NULL || strlen(sc_url) <= 0) {
LOGERROR("[%s] Cannot invoke SC UnexportVolume, SC URL is invalid\n", vol_data->volumeId);
return EUCA_ERROR;
}
rc = re_encrypt_token(vol_data->token, &reencrypted_token);
if (rc != EUCA_OK || reencrypted_token == NULL || strlen(reencrypted_token) <= 0) {
LOGERROR("Failed on re-encryption of token for call to SC\n");
if (reencrypted_token != NULL) {
EUCA_FREE(reencrypted_token);
}
return EUCA_ERROR;
} else {
LOGTRACE("Re-encrypted token for %s is %s\n", vol_data->volumeId, reencrypted_token);
}
threadCorrelationId* corr_id = get_corrid();
LOGTRACE("Calling scClientCall with url: %s and token %s\n", sc_url, vol_data->token);
if (scClientCall( corr_id == NULL ? NULL : corr_id->correlation_id, NULL, use_ws_sec, ws_sec_policy_file, request_timeout_sec, sc_url, "UnexportVolume", vol_data->volumeId, reencrypted_token, local_ip, local_iqn) !=
EUCA_OK) {
EUCA_FREE(reencrypted_token);
LOGERROR("ERROR unexporting volume %s\n", vol_data->volumeId);
return EUCA_ERROR;
} else {
EUCA_FREE(reencrypted_token);
//Ok, now refresh local session to be sure it's gone.
//Should return error of not found.
refreshedDev = get_iscsi_target(connect_string);
if (refreshedDev) {
//Failure, should have NULL.
return EUCA_ERROR;
} else {
//We're good
return EUCA_OK;
}
}
}
int destroy_instance_backing (ncInstance * instance, int do_destroy_files)
{
int ret = OK;
int total_prereqs = 0;
char path [MAX_PATH];
virtualMachine * vm = &(instance->params);
// find and detach iSCSI targets, if any
for (int i=0; i<EUCA_MAX_VBRS && i<vm->virtualBootRecordLen; i++) {
virtualBootRecord * vbr = &(vm->virtualBootRecord[i]);
if (vbr->locationType==NC_LOCATION_IQN) {
if (disconnect_iscsi_target (vbr->resourceLocation)) {
logprintfl(EUCAERROR, "[%s] error: failed to disconnect iSCSI target attached to %s\n", instance->instanceId, vbr->backingPath);
}
}
}
// see if instance directory is there (sometimes startup fails before it is created)
set_path (path, sizeof (path), instance, NULL);
if (check_path (path))
return ret;
// to ensure that we are able to delete all blobs, we chown files back to 'eucalyptus'
// (e.g., libvirt on KVM on Maverick chowns them to libvirt-qemu while
// VM is running and then chowns them to root after termination)
set_path (path, sizeof (path), instance, "*");
if (diskutil_ch (path, EUCALYPTUS_ADMIN, NULL, BACKING_FILE_PERM)) {
logprintfl (EUCAWARN, "[%s] error: failed to chown files before cleanup\n", instance->instanceId);
}
if (do_destroy_files) {
char work_regex [1024]; // {userId}/{instanceId}/.*
set_id2 (instance, "/.*", work_regex, sizeof (work_regex));
if (blobstore_delete_regex (work_bs, work_regex) == -1) {
logprintfl (EUCAERROR, "[%s] error: failed to remove some artifacts in %s\n", instance->instanceId, path);
}
// remove the known leftover files
unlink (instance->xmlFilePath);
unlink (instance->libvirtFilePath);
unlink (instance->consoleFilePath);
if (strlen (instance->floppyFilePath)) {
unlink (instance->floppyFilePath);
}
set_path (path, sizeof (path), instance, "instance.checkpoint");
unlink (path);
for (int i=0; i < EUCA_MAX_VOLUMES; ++i) {
ncVolume * volume = &instance->volumes[i];
snprintf (path, sizeof (path), EUCALYPTUS_VOLUME_XML_PATH_FORMAT, instance->instancePath, volume->volumeId);
unlink (path);
}
// bundle instance will leave additional files
// let's delete every file in the directory
struct dirent **files;
int n = scandir(instance->instancePath, &files, 0, alphasort);
char toDelete[MAX_PATH];
if (n>0){
while (n--) {
struct dirent *entry = files[n];
if( entry !=NULL && strncmp(entry->d_name, ".",1)!=0 && strncmp(entry->d_name, "..", 2)!=0){
snprintf(toDelete, MAX_PATH, "%s/%s", instance->instancePath, entry->d_name);
unlink(toDelete);
free(entry);
}
}
free(files);
}
}
// Finally try to remove the directory.
// If either the user or our code introduced
// any new files, this last step will fail.
set_path (path, sizeof (path), instance, NULL);
if (rmdir (path) && do_destroy_files) {
logprintfl (EUCAWARN, "[%s] warning: failed to remove backing directory %s\n", instance->instanceId, path);
}
return ret;
}