*/
#include "includes.h"
+#include "smbd/globals.h"
#if defined(WITH_AIO)
static int handle_aio_read_complete(struct aio_extra *aio_ex);
static int handle_aio_write_complete(struct aio_extra *aio_ex);
-static struct aio_extra *aio_list_head;
-
static int aio_extra_destructor(struct aio_extra *aio_ex)
{
DLIST_REMOVE(aio_list_head, aio_ex);
We can have these many aio buffers in flight.
*****************************************************************************/
-static int aio_pending_size;
-static sig_atomic_t signals_received;
-static int outstanding_aio_calls;
-static uint16 *aio_pending_array;
-
-/****************************************************************************
- Signal handler when an aio request completes.
-*****************************************************************************/
-
-void aio_request_done(uint16_t mid)
-{
- if (signals_received < aio_pending_size) {
- aio_pending_array[signals_received] = mid;
- signals_received++;
- }
- /* Else signal is lost. */
-}
-
-static void signal_handler(int sig, siginfo_t *info, void *unused)
-{
- aio_request_done(info->si_value.sival_int);
- sys_select_signal(RT_SIGNAL_AIO);
-}
-
-/****************************************************************************
- Is there a signal waiting ?
-*****************************************************************************/
-
-bool aio_finished(void)
-{
- return (signals_received != 0);
-}
-
-/****************************************************************************
- Initialize the signal handler for aio read/write.
-*****************************************************************************/
-
-void initialize_async_io_handler(void)
-{
- struct sigaction act;
-
- aio_pending_size = lp_maxmux();
- aio_pending_array = SMB_MALLOC_ARRAY(uint16, aio_pending_size);
- SMB_ASSERT(aio_pending_array != NULL);
-
- ZERO_STRUCT(act);
- act.sa_sigaction = signal_handler;
- act.sa_flags = SA_SIGINFO;
- sigemptyset( &act.sa_mask );
- if (sigaction(RT_SIGNAL_AIO, &act, NULL) != 0) {
- DEBUG(0,("Failed to setup RT_SIGNAL_AIO handler\n"));
- }
-
- /* the signal can start off blocked due to a bug in bash */
- BlockSignals(False, RT_SIGNAL_AIO);
-}
-
/****************************************************************************
Set up an aio request from a SMBreadX call.
*****************************************************************************/
Returns non-zero errno if fail or zero if all ok.
*****************************************************************************/
-int process_aio_queue(void)
+void smbd_aio_complete_mid(unsigned int mid)
{
- int i;
+ files_struct *fsp = NULL;
+ struct aio_extra *aio_ex = find_aio_ex(mid);
int ret = 0;
- BlockSignals(True, RT_SIGNAL_AIO);
-
- DEBUG(10,("process_aio_queue: signals_received = %d\n",
- (int)signals_received));
- DEBUG(10,("process_aio_queue: outstanding_aio_calls = %d\n",
- outstanding_aio_calls));
+ DEBUG(10,("smbd_aio_complete_mid: mid[%u]\n", mid));
- if (!signals_received) {
- BlockSignals(False, RT_SIGNAL_AIO);
- return 0;
+ if (!aio_ex) {
+ DEBUG(3,("smbd_aio_complete_mid: Can't find record to "
+ "match mid %u.\n", mid));
+ srv_cancel_sign_response(mid);
+ return;
}
- /* Drain all the complete aio_reads. */
- for (i = 0; i < signals_received; i++) {
- uint16 mid = aio_pending_array[i];
- files_struct *fsp = NULL;
- struct aio_extra *aio_ex = find_aio_ex(mid);
-
- if (!aio_ex) {
- DEBUG(3,("process_aio_queue: Can't find record to "
- "match mid %u.\n", (unsigned int)mid));
- srv_cancel_sign_response(mid);
- continue;
- }
+ fsp = aio_ex->fsp;
+ if (fsp == NULL) {
+ /* file was closed whilst I/O was outstanding. Just
+ * ignore. */
+ DEBUG( 3,( "smbd_aio_complete_mid: file closed whilst "
+ "aio outstanding (mid[%u]).\n", mid));
+ srv_cancel_sign_response(mid);
+ return;
+ }
- fsp = aio_ex->fsp;
- if (fsp == NULL) {
- /* file was closed whilst I/O was outstanding. Just
- * ignore. */
- DEBUG( 3,( "process_aio_queue: file closed whilst "
- "aio outstanding.\n"));
- srv_cancel_sign_response(mid);
- continue;
- }
+ if (!handle_aio_completed(aio_ex, &ret)) {
+ return;
+ }
- if (!handle_aio_completed(aio_ex, &ret)) {
- continue;
- }
+ TALLOC_FREE(aio_ex);
+}
- TALLOC_FREE(aio_ex);
- }
+static void smbd_aio_signal_handler(struct tevent_context *ev_ctx,
+ struct tevent_signal *se,
+ int signum, int count,
+ void *_info, void *private_data)
+{
+ siginfo_t *info = (siginfo_t *)_info;
+ unsigned int mid = (unsigned int)info->si_value.sival_int;
- outstanding_aio_calls -= signals_received;
- signals_received = 0;
- BlockSignals(False, RT_SIGNAL_AIO);
- return ret;
+ smbd_aio_complete_mid(mid);
}
/****************************************************************************
}
}
-#else
-bool aio_finished(void)
-{
- return False;
-}
+/****************************************************************************
+ Initialize the signal handler for aio read/write.
+*****************************************************************************/
void initialize_async_io_handler(void)
{
+ aio_signal_event = tevent_add_signal(smbd_event_context(),
+ smbd_event_context(),
+ RT_SIGNAL_AIO, SA_SIGINFO,
+ smbd_aio_signal_handler,
+ NULL);
+ if (!aio_signal_event) {
+ exit_server("Failed to setup RT_SIGNAL_AIO handler");
+ }
+
+ /* tevent supports 100 signal with SA_SIGINFO */
+ aio_pending_size = 100;
}
-int process_aio_queue(void)
+#else
+void initialize_async_io_handler(void)
{
- return False;
}
bool schedule_aio_read_and_X(connection_struct *conn,
{
return ENOSYS;
}
+
+void smbd_aio_complete_mid(unsigned int mid);
+
#endif
git.samba.org / metze / samba / wip.git / blobdiff