//!
//! Creator callback for the convert operation
//!
//! @param[in] a
//!
//! @return EUCA_OK on success or EUCA_ERROR on failure or the result of
//! vmdk_convert_local() or vmdk_convert_remote().
//!
//! @see vmdk_convert_local(), vmdk_convert_remote()
//!
static int convert_creator(artifact * a)
{
int ret = EUCA_ERROR;
const char *in_path = NULL;
const char *out_path = NULL;
convert_params *state = NULL;
assert(a);
assert(a->internal);
state = ((convert_params *) a->internal);
art_set_instanceId("convert"); // for logging
// determine paths for input of output
if (a->deps[0]) { // there is a dependent artifact upstream, use it
in_path = blockblob_get_dev(a->deps[0]->bb);
} else { // no dependents, assume that input is the path itself (or '-' for stdin)
assert(strlen(state->in));
in_path = state->in;
}
if (a->id_is_path) {
out_path = a->id;
} else {
assert(a->bb);
out_path = blockblob_get_file(a->bb);
}
assert(out_path);
// do the conversion to create the artifact
LOGINFO("converting from '%s' to '%s'\n", in_path, out_path);
if (state->remote) {
switch(state->in_type) {
case DISK:
ret = vmdk_convert_to_remote(in_path, state->remote, state->start_sector, state->end_sector, state->buf_size_bytes);
break;
case VMDK:
ret = vmdk_convert_from_remote(state->remote, out_path, state->start_sector, state->end_sector, state->buf_size_bytes);
break;
default:
LOGERROR("unexpected input type (%d)\n", state->in_type);
break;
}
} else {
assert(state->in_type==DISK); // currently, only DISK->VMDK conversion is supported
ret = vmdk_convert_local(in_path, out_path, TRUE);
}
if (ret != EUCA_OK) {
LOGERROR("failed to convert '%s' to '%s'\n", in_path, out_path);
}
return ret;
}
//!
//! Main entry point of the application
//!
//! @param[in] argc the number of parameter passed on the command line
//! @param[in] argv the list of arguments
//!
//! @return EUCA_OK on success or EUCA_ERROR on failure.
//!
int main(int argc, char *argv[])
{
int i = 0;
int ret = EUCA_OK;
int nparams = 0;
int ncmds = 0;
char *eq = NULL;
char *key = NULL;
char *val = NULL;
char euca_root[] = "";
char argv_str[4096] = "";
char *cmd_name = NULL;
char pid_file[EUCA_MAX_PATH] = "";
FILE *fp = NULL;
pid_t pid = 0;
artifact *root = NULL;
blobstore *work_bs = NULL;
blobstore *cache_bs = NULL;
imager_param *cmd_params = NULL;
log_fp_set(stderr); // imager logs to stderr so image data can be piped to stdout
set_debug(print_debug);
// initialize globals
artifacts_map = map_create(10);
// use $EUCALYPTUS env var if available
euca_home = getenv(EUCALYPTUS_ENV_VAR_NAME);
if (!euca_home) {
euca_home = euca_root;
}
// save the command line into a buffer so it's easier to rerun it by hand
argv_str[0] = '\0';
for (i = 0; i < argc; i++) {
strncat(argv_str, "\"", sizeof(argv_str) - strlen(argv_str) - 1);
strncat(argv_str, argv[i], sizeof(argv_str) - strlen(argv_str) - 1);
strncat(argv_str, "\" ", sizeof(argv_str) - strlen(argv_str) - 1);
}
// initialize dependencies
if (vmdk_init() == EUCA_OK) {
vddk_available = TRUE;
}
// parse command-line parameters
while (*(++argv)) {
eq = strstr(*argv, "="); // all params have '='s
if (eq == NULL) { // it's a command
// process previous command, if any
if (validate_cmd(ncmds, cmd_name, cmd_params, *argv) != NULL)
ncmds++; // increment only if there was a previous command
if (ncmds + 1 > MAX_REQS)
err("too many commands (max is %d)", MAX_REQS);
cmd_name = *argv;
cmd_params = NULL;
nparams = 0;
} else { // this is a parameter
if (strlen(eq) == 1)
usage("parameters must have non-empty values");
*eq = '\0'; // split key from value
if (strlen(*argv) == 1)
usage("parameters must have non-empty names");
key = *argv;
val = eq + 1;
if (key == NULL || val == NULL)
usage("syntax error in parameters");
if (key[0] == '-')
key++; // skip '-' if any
if (key[0] == '-')
key++; // skip second '-' if any
if (cmd_name == NULL) { // without a preceding command => global parameter
set_global_parameter(key, val);
continue;
}
if (cmd_params == NULL) {
cmd_params = calloc(MAX_PARAMS + 1, sizeof(imager_param)); // +1 for terminating NULL
if (!cmd_params)
err("calloc failed");
}
if (nparams + 1 > MAX_PARAMS)
err("too many parameters (max is %d)", MAX_PARAMS);
cmd_params[nparams].key = key;
cmd_params[nparams].val = val;
nparams++;
}
}
if (validate_cmd(ncmds, cmd_name, cmd_params, *argv) != NULL) // validate last command
ncmds++;
LOGINFO("verified all parameters for %d command(s)\n", ncmds);
if (print_argv) {
LOGDEBUG("argv[]: %s\n", argv_str);
}
// record PID, which may be used by VB to kill the imager process (e.g., in cancelBundling)
pid = getpid();
sprintf(pid_file, "%s/imager.pid", get_work_dir());
if ((fp = fopen(pid_file, "w")) == NULL) {
err("could not create pid file");
} else {
fprintf(fp, "%d", pid);
fclose(fp);
}
// invoke the requirements checkers in the same order as on command line,
// constructing the artifact tree originating at 'root'
for (i = 0; i < ncmds; i++) {
if (reqs[i].cmd->requirements != NULL) {
art_set_instanceId(reqs[i].cmd->name); // for logging
if ((root = reqs[i].cmd->requirements(&reqs[i], root)) == NULL) // pass results of earlier checkers to later checkers
err("failed while verifying requirements");
}
}
// it is OK for root to be NULL at this point
// see if work blobstore will be needed at any stage
// and open or create the work blobstore
if (root && tree_uses_blobstore(root)) {
// set the function that will catch blobstore errors
blobstore_set_error_function(&bs_errors);
if (ensure_directories_exist(get_work_dir(), 0, NULL, NULL, BLOBSTORE_DIRECTORY_PERM) == -1)
err("failed to open or create work directory %s", get_work_dir());
work_bs = blobstore_open(get_work_dir(), get_work_limit() / 512, BLOBSTORE_FLAG_CREAT, BLOBSTORE_FORMAT_FILES, BLOBSTORE_REVOCATION_NONE, BLOBSTORE_SNAPSHOT_ANY);
if (work_bs == NULL) {
err("failed to open work blobstore: %s", blobstore_get_error_str(blobstore_get_error()));
}
// no point in fscking the work blobstore as it was just created
}
// see if cache blobstore will be needed at any stage
if (root && tree_uses_cache(root)) {
if (ensure_directories_exist(get_cache_dir(), 0, NULL, NULL, BLOBSTORE_DIRECTORY_PERM) == -1)
err("failed to open or create cache directory %s", get_cache_dir());
cache_bs = blobstore_open(get_cache_dir(), get_cache_limit() / 512, BLOBSTORE_FLAG_CREAT, BLOBSTORE_FORMAT_DIRECTORY, BLOBSTORE_REVOCATION_LRU, BLOBSTORE_SNAPSHOT_ANY);
if (cache_bs == NULL) {
blobstore_close(work_bs);
err("failed to open cache blobstore: %s\n", blobstore_get_error_str(blobstore_get_error()));
}
if (blobstore_fsck(cache_bs, NULL)) //! @TODO: verify checksums?
err("cache blobstore failed integrity check: %s", blobstore_get_error_str(blobstore_get_error()));
if (stat_blobstore(get_cache_dir(), cache_bs))
err("blobstore is unreadable");
}
// implement the artifact tree
ret = EUCA_OK;
if (root) {
art_set_instanceId("imager"); // for logging
ret = art_implement_tree(root, work_bs, cache_bs, NULL, INSTANCE_PREP_TIMEOUT_USEC); // do all the work!
}
// invoke the cleaners for each command to tidy up disk space and memory allocations
for (i = 0; i < ncmds; i++) {
if (reqs[i].cmd->cleanup != NULL) {
art_set_instanceId(reqs[i].cmd->name); // for logging
reqs[i].cmd->cleanup(&reqs[i], (i == (ncmds - 1)) ? (TRUE) : (FALSE));
}
}
// free the artifact tree
if (root) {
if (tree_uses_blobstore(root)) {
if (blobstore_fsck(work_bs, stale_blob_examiner)) { // will remove all blobs
LOGWARN("failed to clean up work space: %s\n", blobstore_get_error_str(blobstore_get_error()));
}
}
art_free(root);
}
clean_work_dir(work_bs);
// indicate completion
LOGINFO("imager done (exit code=%d)\n", ret);
exit(ret);
}
