static int blockpause(void *args)
{
ASYNC_block_pause();
ASYNC_pause_job();
ASYNC_unblock_pause();
ASYNC_pause_job();
return 1;
}
static int wake(void *args)
{
ASYNC_pause_job();
ASYNC_wake(ASYNC_get_current_job());
ASYNC_pause_job();
ASYNC_clear_wake(ASYNC_get_current_job());
return 1;
}
static int save_current(void *args)
{
currjob = ASYNC_get_current_job();
ASYNC_pause_job();
return 1;
}
static int add_two(void *args)
{
ctr++;
ASYNC_pause_job();
ctr++;
return 2;
}
static void dummy_pause_job(void) {
ASYNC_JOB *job;
if ((job = ASYNC_get_current_job()) == NULL)
return;
/*
* In the Dummy async engine we are cheating. We signal that the job
* is complete by waking it before the call to ASYNC_pause_job(). A real
* async engine would only wake when the job was actually complete
*/
ASYNC_wake(job);
/* Ignore errors - we carry on anyway */
ASYNC_pause_job();
ASYNC_clear_wake(job);
}
int qat_pause_job(ASYNC_JOB *job, int notificationNo)
{
/* We will ignore notificationNo for the moment */
ASYNC_WAIT_CTX *waitctx;
OSSL_ASYNC_FD efd;
void *custom = NULL;
uint64_t buf = 0;
int ret = 0;
if (ASYNC_pause_job() == 0)
return ret;
if ((waitctx = ASYNC_get_wait_ctx(job)) == NULL)
return ret;
if ((ret = ASYNC_WAIT_CTX_get_fd(waitctx, engine_qat_id, &efd,
&custom)) > 0) {
read(efd, &buf, sizeof(uint64_t));
}
return ret;
}
static void dummy_pause_job(void) {
ASYNC_JOB *job;
ASYNC_WAIT_CTX *waitctx;
OSSL_ASYNC_FD pipefds[2] = {0, 0};
OSSL_ASYNC_FD *writefd;
#if defined(ASYNC_WIN)
DWORD numwritten, numread;
char buf = DUMMY_CHAR;
#elif defined(ASYNC_POSIX)
char buf = DUMMY_CHAR;
#endif
if ((job = ASYNC_get_current_job()) == NULL)
return;
waitctx = ASYNC_get_wait_ctx(job);
if (ASYNC_WAIT_CTX_get_fd(waitctx, engine_dasync_id, &pipefds[0],
(void **)&writefd)) {
pipefds[1] = *writefd;
} else {
writefd = OPENSSL_malloc(sizeof(*writefd));
if (writefd == NULL)
return;
#if defined(ASYNC_WIN)
if (CreatePipe(&pipefds[0], &pipefds[1], NULL, 256) == 0) {
OPENSSL_free(writefd);
return;
}
#elif defined(ASYNC_POSIX)
if (pipe(pipefds) != 0) {
OPENSSL_free(writefd);
return;
}
#endif
*writefd = pipefds[1];
if(!ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_dasync_id, pipefds[0],
writefd, wait_cleanup)) {
wait_cleanup(waitctx, engine_dasync_id, pipefds[0], writefd);
return;
}
}
/*
* In the Dummy async engine we are cheating. We signal that the job
* is complete by waking it before the call to ASYNC_pause_job(). A real
* async engine would only wake when the job was actually complete
*/
#if defined(ASYNC_WIN)
WriteFile(pipefds[1], &buf, 1, &numwritten, NULL);
#elif defined(ASYNC_POSIX)
if (write(pipefds[1], &buf, 1) < 0)
return;
#endif
/* Ignore errors - we carry on anyway */
ASYNC_pause_job();
/* Clear the wake signal */
#if defined(ASYNC_WIN)
ReadFile(pipefds[0], &buf, 1, &numread, NULL);
#elif defined(ASYNC_POSIX)
if (read(pipefds[0], &buf, 1) < 0)
return;
#endif
}
static int afalg_fin_cipher_aio(afalg_aio *aio, int sfd, unsigned char *buf,
size_t len)
{
int r;
int retry = 0;
unsigned int done = 0;
struct iocb *cb;
struct timespec timeout;
struct io_event events[MAX_INFLIGHTS];
u_int64_t eval = 0;
timeout.tv_sec = 0;
timeout.tv_nsec = 0;
/* if efd has not been initialised yet do it here */
if (aio->mode == MODE_UNINIT) {
r = afalg_setup_async_event_notification(aio);
if (r == 0)
return 0;
}
cb = &(aio->cbt[0 % MAX_INFLIGHTS]);
memset(cb, '\0', sizeof(*cb));
cb->aio_fildes = sfd;
cb->aio_lio_opcode = IOCB_CMD_PREAD;
/*
* The pointer has to be converted to unsigned value first to avoid
* sign extension on cast to 64 bit value in 32-bit builds
*/
cb->aio_buf = (size_t)buf;
cb->aio_offset = 0;
cb->aio_data = 0;
cb->aio_nbytes = len;
cb->aio_flags = IOCB_FLAG_RESFD;
cb->aio_resfd = aio->efd;
/*
* Perform AIO read on AFALG socket, this in turn performs an async
* crypto operation in kernel space
*/
r = io_read(aio->aio_ctx, 1, &cb);
if (r < 0) {
ALG_PWARN("%s: io_read failed : ", __func__);
return 0;
}
do {
/* While AIO read is being performed pause job */
ASYNC_pause_job();
/* Check for completion of AIO read */
r = read(aio->efd, &eval, sizeof(eval));
if (r < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK)
continue;
ALG_PERR("%s: read failed for event fd : ", __func__);
return 0;
} else if (r == 0 || eval <= 0) {
ALG_WARN("%s: eventfd read %d bytes, eval = %lu\n", __func__, r,
eval);
}
if (eval > 0) {
/* Get results of AIO read */
r = io_getevents(aio->aio_ctx, 1, MAX_INFLIGHTS,
events, &timeout);
if (r > 0) {
/*
* events.res indicates the actual status of the operation.
* Handle the error condition first.
*/
if (events[0].res < 0) {
/*
* Underlying operation cannot be completed at the time
* of previous submission. Resubmit for the operation.
*/
if (events[0].res == -EBUSY && retry++ < 3) {
r = io_read(aio->aio_ctx, 1, &cb);
if (r < 0) {
ALG_PERR("%s: retry %d for io_read failed : ",
__func__, retry);
return 0;
}
continue;
} else {
/*
* Retries exceed for -EBUSY or unrecoverable error
* condition for this instance of operation.
*/
ALG_WARN
("%s: Crypto Operation failed with code %lld\n",
__func__, events[0].res);
return 0;
}
}
/* Operation successful. */
done = 1;
} else if (r < 0) {
ALG_PERR("%s: io_getevents failed : ", __func__);
return 0;
} else {
ALG_WARN("%s: io_geteventd read 0 bytes\n", __func__);
}
}
} while (!done);
return 1;
}
static int only_pause(void *args)
{
ASYNC_pause_job();
return 1;
}
