//!
//! given path=A/B/C and only A existing, create A/B and, unless
//! is_file_path==1, also create A/B/C directory
//!
//! @param[in] path
//! @param[in] is_file_path
//! @param[in] user
//! @param[in] group
//! @param[in] mode
//!
//! @return 0 = path already existed, 1 = created OK, -1 = error
//!
int ensure_directories_exist(const char *path, int is_file_path, const char *user, const char *group, mode_t mode)
{
int ret = 0;
int i = 0;
int len = strlen(path);
int try_dir = 0;
char *path_copy = NULL;
struct stat buf = { 0 };
if (len > 0)
path_copy = strdup(path);
if (path_copy == NULL)
return (-1);
for (i = 0; i < len; i++) {
try_dir = 0;
if ((path[i] == '/') && (i > 0)) {
// dir path, not root
path_copy[i] = '\0';
try_dir = 1;
} else if ((path[i] != '/') && ((i + 1) == len)) {
// last one
if (!is_file_path)
try_dir = 1;
}
if (try_dir) {
if (stat(path_copy, &buf) == -1) {
LOGINFO("creating path %s\n", path_copy);
if (mkdir(path_copy, mode) == -1) {
LOGERROR("failed to create path %s: %s\n", path_copy, strerror(errno));
EUCA_FREE(path_copy);
return (-1);
}
ret = 1; // we created a directory
if (diskutil_ch(path_copy, user, group, mode) != EUCA_OK) {
LOGERROR("failed to change perms on path %s\n", path_copy);
EUCA_FREE(path_copy);
return (-1);
}
}
path_copy[i] = '/'; // restore the slash
}
}
EUCA_FREE(path_copy);
return (ret);
}
//!
//! Handles the console output retrieval request.
//!
//! @param[in] nc a pointer to the NC state structure to initialize
//! @param[in] pMeta a pointer to the node controller (NC) metadata structure
//! @param[in] instanceId the instance identifier string (i-XXXXXXXX)
//! @param[out] consoleOutput a pointer to the unallocated string that will contain the output
//!
//! @return EUCA_OK on success or EUCA_ERROR and EUCA_NOT_FOUND_ERROR on failure.
//!
static int doGetConsoleOutput(struct nc_state_t *nc, ncMetadata * pMeta, char *instanceId, char **consoleOutput)
{
int rc = 0;
int fd = 0;
int ret = EUCA_OK;
int readsize = 0;
char *console_output = NULL;
char *console_append = NULL;
char *console_main = NULL;
char console_file[MAX_PATH] = "";
char userId[48] = "";
ncInstance *instance = NULL;
struct stat statbuf = { 0 };
*consoleOutput = NULL;
readsize = 64 * 1024;
// find the instance record
sem_p(inst_sem);
{
if ((instance = find_instance(&global_instances, instanceId)) != NULL) {
snprintf(console_file, 1024, "%s/console.append.log", instance->instancePath);
snprintf(userId, 48, "%s", instance->userId);
}
}
sem_v(inst_sem);
if (!instance) {
logprintfl(EUCAERROR, "[%s] cannot locate instance\n", instanceId);
return (EUCA_NOT_FOUND_ERROR);
}
// read from console.append.log if it exists into dynamically allocated 4K console_append buffer
if ((rc = stat(console_file, &statbuf)) >= 0) {
if (diskutil_ch(console_file, nc->admin_user_id, nc->admin_user_id, 0) != EUCA_OK) {
logprintfl(EUCAERROR, "[%s] failed to change ownership of %s\n", instanceId, console_file);
return (EUCA_ERROR);
}
if ((fd = open(console_file, O_RDONLY)) >= 0) {
if ((console_append = EUCA_ZALLOC(4096, sizeof(char))) != NULL) {
rc = read(fd, console_append, (4096) - 1);
}
close(fd);
}
}
sem_p(inst_sem);
{
snprintf(console_file, MAX_PATH, "%s/console.log", instance->instancePath);
}
sem_v(inst_sem);
// read the last 64K from console.log or the whole file, if smaller, into dynamically allocated 64K console_main buffer
if ((rc = stat(console_file, &statbuf)) >= 0) {
if (diskutil_ch(console_file, nc->admin_user_id, nc->admin_user_id, 0) != EUCA_OK) {
logprintfl(EUCAERROR, "[%s] failed to change ownership of %s\n", instanceId, console_file);
EUCA_FREE(console_append);
return (EUCA_ERROR);
}
if ((fd = open(console_file, O_RDONLY)) >= 0) {
if ((rc = lseek(fd, (off_t) (-1 * readsize), SEEK_END)) < 0) {
if ((rc = lseek(fd, (off_t) 0, SEEK_SET)) < 0) {
logprintfl(EUCAERROR, "[%s] cannot seek to beginning of file\n", instanceId);
if (console_append)
EUCA_FREE(console_append);
close(fd);
return (EUCA_ERROR);
}
}
if ((console_main = EUCA_ZALLOC(readsize, sizeof(char))) != NULL) {
rc = read(fd, console_main, (readsize) - 1);
}
close(fd);
} else {
logprintfl(EUCAERROR, "[%s] cannot open '%s' read-only\n", instanceId, console_file);
}
} else {
logprintfl(EUCAERROR, "[%s] cannot stat console_output file '%s'\n", instanceId, console_file);
}
// concatenate console_append with console_main, base64-encode this, and put into dynamically allocated buffer consoleOutput
ret = EUCA_ERROR;
if ((console_output = EUCA_ZALLOC((readsize) + 4096, sizeof(char))) != NULL) {
if (console_append) {
strncat(console_output, console_append, 4096);
}
if (console_main) {
strncat(console_output, console_main, readsize);
}
*consoleOutput = base64_enc((unsigned char *)console_output, strlen(console_output));
ret = EUCA_OK;
}
EUCA_FREE(console_append);
EUCA_FREE(console_main);
EUCA_FREE(console_output);
return (ret);
}
//!
//! Destroy the backing store for a given instance
//!
//! @param[in] instance the instance identifier for which we will destroy the backing store
//! @param[in] do_destroy_files set to TRUE if we need to destroy the content otherwise set to FALSE.
//!
//! @return EUCA_OK on success
//!
//! @pre The instance parameter must not be NULL and do_destroy_files must be a valid boolean.
//!
//! @note
//!
int destroy_instance_backing(ncInstance * instance, boolean do_destroy_files)
{
int i = 0;
int ret = EUCA_OK;
char path[EUCA_MAX_PATH] = "";
char work_regex[1024] = ""; // {userId}/{instanceId}/.*
char scURL[512] = "";
ncVolume *volume = NULL;
virtualMachine *vm = &(instance->params);
virtualBootRecord *vbr = NULL;
if (get_localhost_sc_url(scURL) != EUCA_OK || strlen(scURL) == 0) {
LOGWARN("[%s] could not obtain SC URL (is SC enabled?)\n", instance->instanceId);
scURL[0] = '\0';
}
// find and detach iSCSI targets, if any
for (i = 0; ((i < EUCA_MAX_VBRS) && (i < vm->virtualBootRecordLen)); i++) {
vbr = &(vm->virtualBootRecord[i]);
if (vbr->locationType == NC_LOCATION_SC) {
if (disconnect_ebs_volume
(scURL, localhost_config.use_ws_sec, localhost_config.ws_sec_policy_file, vbr->resourceLocation, vbr->preparedResourceLocation, localhost_config.ip,
localhost_config.iqn) != 0) {
LOGERROR("[%s] failed to disconnect volume attached to '%s'\n", instance->instanceId, vbr->backingPath);
}
}
}
// there may be iSCSI targets for volumes if instance disappeared or was migrated
for (i = 0; i < EUCA_MAX_VOLUMES; ++i) {
ncVolume *volume = &instance->volumes[i];
if (!is_volume_used(volume))
continue;
if (disconnect_ebs_volume
(scURL, localhost_config.use_ws_sec, localhost_config.ws_sec_policy_file, volume->attachmentToken, volume->connectionString, localhost_config.ip,
localhost_config.iqn) != 0) {
LOGERROR("[%s][%s] failed to disconnect volume\n", instance->instanceId, volume->volumeId);
}
}
// 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)
{
DIR *dir = NULL;
if ((dir = opendir(path)) == NULL) {
return (-1);
}
struct dirent *dir_entry;
while ((dir_entry = readdir(dir)) != NULL) {
char *entry_name = dir_entry->d_name;
if (!strcmp(".", entry_name) || !strcmp("..", entry_name))
continue;
// get the path of the directory item
char entry_path[BLOBSTORE_MAX_PATH];
snprintf(entry_path, sizeof(entry_path), "%s/%s", path, entry_name);
if (diskutil_ch(entry_path, EUCALYPTUS_ADMIN, NULL, BACKING_FILE_PERM)) {
LOGWARN("[%s] failed to chown files before cleanup\n", instance->instanceId);
}
}
closedir(dir);
}
if (do_destroy_files) {
set_id2(instance, "/.*", work_regex, sizeof(work_regex));
if (blobstore_delete_regex(work_bs, work_regex) == -1) {
LOGERROR("[%s] failed to remove some artifacts in %s\n", instance->instanceId, path);
}
for (i = 0; i < EUCA_MAX_VOLUMES; ++i) {
volume = &instance->volumes[i];
snprintf(path, sizeof(path), EUCALYPTUS_VOLUME_XML_PATH_FORMAT, instance->instancePath, volume->volumeId);
unlink(path);
}
// delete all non-blob files in the directory
if (blobstore_delete_nonblobs(work_bs, instance->instancePath) < 0) {
LOGWARN("[%s] failed to delete some non-blob files under %s\n", instance->instanceId, instance->instancePath);
}
}
// 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) {
LOGWARN("[%s] failed to remove backing directory %s\n", instance->instanceId, path);
}
return (ret);
}
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;
}
static int
doGetConsoleOutput( struct nc_state_t *nc,
ncMetadata *meta,
char *instanceId,
char **consoleOutput) {
char *console_output=NULL, *console_append=NULL, *console_main=NULL;
char console_file[MAX_PATH], userId[48];
int rc, fd, ret, readsize;
struct stat statbuf;
ncInstance *instance=NULL;
*consoleOutput = NULL;
readsize = 64 * 1024;
// find the instance record
sem_p (inst_sem);
instance = find_instance(&global_instances, instanceId);
if (instance) {
snprintf(console_file, 1024, "%s/console.append.log", instance->instancePath);
snprintf(userId, 48, "%s", instance->userId);
}
sem_v (inst_sem);
if (!instance) {
logprintfl(EUCAERROR, "doGetConsoleOutput(): cannot locate instance with instanceId=%s\n", instanceId);
return(1);
}
// read from console.append.log if it exists into dynamically allocated 4K console_append buffer
rc = stat(console_file, &statbuf);
if (rc >= 0) {
if (diskutil_ch (console_file, nc->admin_user_id, nc->admin_user_id, 0) != OK) {
logprintfl (EUCAERROR, "doGetConsoleOutput(): failed to change ownership of %s\n", console_file);
return (1);
}
fd = open(console_file, O_RDONLY);
if (fd >= 0) {
console_append = malloc(4096);
if (console_append) {
bzero(console_append, 4096);
rc = read(fd, console_append, (4096)-1);
close(fd);
}
}
}
sem_p (inst_sem);
snprintf(console_file, MAX_PATH, "%s/console.log", instance->instancePath);
sem_v (inst_sem);
// read the last 64K from console.log or the whole file, if smaller, into dynamically allocated 64K console_main buffer
rc = stat(console_file, &statbuf);
if (rc >= 0) {
if (diskutil_ch (console_file, nc->admin_user_id, nc->admin_user_id, 0) != OK) {
logprintfl (EUCAERROR, "doGetConsoleOutput(): failed to change ownership of %s\n", console_file);
if (console_append)
free(console_append);
return (1);
}
fd = open(console_file, O_RDONLY);
if (fd >= 0) {
rc = lseek(fd, (off_t)(-1 * readsize), SEEK_END);
if (rc < 0) {
rc = lseek(fd, (off_t)0, SEEK_SET);
if (rc < 0) {
logprintfl(EUCAERROR, "cannot seek to beginning of file\n");
if (console_append) free(console_append);
close(fd);
return(1);
}
}
console_main = malloc(readsize);
if (console_main) {
bzero(console_main, readsize);
rc = read(fd, console_main, (readsize)-1);
close(fd);
}
} else {
logprintfl(EUCAERROR, "cannot open '%s' read-only\n", console_file);
}
} else {
logprintfl(EUCAERROR, "cannot stat console_output file '%s'\n", console_file);
}
// concatenate console_append with console_main, base64-encode this, and put into dynamically allocated buffer consoleOutput
ret = 1;
console_output = malloc( (readsize) + 4096 );
if (console_output) {
bzero(console_output, (readsize) + 4096 );
if (console_append) {
strncat(console_output, console_append, 4096);
}
if (console_main) {
strncat(console_output, console_main, readsize);
}
*consoleOutput = base64_enc((unsigned char *)console_output, strlen(console_output));
ret = 0;
}
if (console_append) free(console_append);
if (console_main) free(console_main);
if (console_output) free(console_output);
return(ret);
}
