/* Tests for AIO in librt.

   Copyright (C) 1998-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <aio.h>

#include <errno.h>

#include <error.h>

#include <fcntl.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <sys/stat.h>

/* Prototype for our test function.  */

extern void do_prepare (int argc, char *argv[]);

extern int do_test (int argc, char *argv[]);

/* We have a preparation function.  */

#define PREPARE do_prepare

/* We might need a bit longer timeout.  */

#define TIMEOUT 20 /* sec */

/* This defines the `main' function and some more.  */

#include <test-skeleton.c>

/* These are for the temporary file we generate.  */

char *name;

int fd;

void

do_prepare (int argc, char *argv[])

{

  size_t name_len;

  name_len = strlen (test_dir);

  name = xmalloc (name_len + sizeof ("/aioXXXXXX"));

  mempcpy (mempcpy (name, test_dir, name_len),

	   "/aioXXXXXX", sizeof ("/aioXXXXXX"));

  /* Open our test file.   */

  fd = mkstemp (name);

  if (fd == -1)

    error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);

  add_temp_file (name);

}

static int

test_file (const void *buf, size_t size, int fd, const char *msg)

{

  struct stat st;

  char tmp[size];

  errno = 0;

  if (fstat (fd, &st) < 0)

    {

      error (0, errno, "%s: failed stat", msg);

      return 1;

    }

  if (st.st_size != (off_t) size)

    {

      error (0, errno, "%s: wrong size: %lu, should be %lu",

	     msg, (unsigned long int) st.st_size, (unsigned long int) size);

      return 1;

    }

  if (pread (fd, tmp, size, 0) != (ssize_t) size)

    {

      error (0, errno, "%s: failed pread", msg);

      return 1;

    }

  if (memcmp (buf, tmp, size) != 0)

    {

      error (0, errno, "%s: failed comparison", msg);

      return 1;

    }

  printf ("%s test ok\n", msg);

  return 0;

}

static int

do_wait (struct aiocb **cbp, size_t nent, int allowed_err)

{

  int go_on;

  size_t cnt;

  int result = 0;

  do

    {

      aio_suspend ((const struct aiocb *const *) cbp, nent, NULL);

      go_on = 0;

      for (cnt = 0; cnt < nent; ++cnt)

	if (cbp[cnt] != NULL)

	  {

	    if (aio_error (cbp[cnt]) == EINPROGRESS)

	      go_on = 1;

	    else

	      {

		if (aio_return (cbp[cnt]) == -1

		    && (allowed_err == 0

			|| aio_error (cbp[cnt]) != allowed_err))

		  {

		    error (0, aio_error (cbp[cnt]), "Operation failed\n");

		    result = 1;

		  }

		cbp[cnt] = NULL;

	      }

	  }

    }

  while (go_on);

  return result;

}

int

do_test (int argc, char *argv[])

{

  struct aiocb cbs[10];

  struct aiocb cbs_fsync;

  struct aiocb *cbp[10];

  struct aiocb *cbp_fsync[1];

  char buf[1000];

  size_t cnt;

  int result = 0;

  /* Preparation.  */

  for (cnt = 0; cnt < 10; ++cnt)

    {

      cbs[cnt].aio_fildes = fd;

      cbs[cnt].aio_reqprio = 0;

      cbs[cnt].aio_buf = memset (&buf[cnt * 100], '0' + cnt, 100);

      cbs[cnt].aio_nbytes = 100;

      cbs[cnt].aio_offset = cnt * 100;

      cbs[cnt].aio_sigevent.sigev_notify = SIGEV_NONE;

      cbp[cnt] = &cbs[cnt];

    }

  /* First a simple test.  */

  for (cnt = 10; cnt > 0; )

    if (aio_write (cbp[--cnt]) < 0 && errno == ENOSYS)

      {

	error (0, 0, "no aio support in this configuration");

	return 0;

      }

  /* Wait 'til the results are there.  */

  result |= do_wait (cbp, 10, 0);

  /* Test this.  */

  result |= test_file (buf, sizeof (buf), fd, "aio_write");

  /* Read now as we've written it.  */

  memset (buf, '\0', sizeof (buf));

  /* Issue the commands.  */

  for (cnt = 10; cnt > 0; )

    {

      --cnt;

      cbp[cnt] = &cbs[cnt];

      aio_read (cbp[cnt]);

    }

  /* Wait 'til the results are there.  */

  result |= do_wait (cbp, 10, 0);

  /* Test this.  */

  for (cnt = 0; cnt < 1000; ++cnt)

    if (buf[cnt] != '0' + (cnt / 100))

      {

	result = 1;

	error (0, 0, "comparison failed for aio_read test");

	break;

      }

  if (cnt == 1000)

    puts ("aio_read test ok");

  /* Remove the test file contents.  */

  if (ftruncate (fd, 0) < 0)

    {

      error (0, errno, "ftruncate failed\n");

      result = 1;

    }

  /* Test lio_listio.  */

  for (cnt = 0; cnt < 10; ++cnt)

    {

      cbs[cnt].aio_lio_opcode = LIO_WRITE;

      cbp[cnt] = &cbs[cnt];

    }

  /* Issue the command.  */

  lio_listio (LIO_WAIT, cbp, 10, NULL);

  /* ...and immediately test it since we started it in wait mode.  */

  result |= test_file (buf, sizeof (buf), fd, "lio_listio (write)");

  /* Test aio_fsync.  */

  cbs_fsync.aio_fildes = fd;

  cbs_fsync.aio_sigevent.sigev_notify = SIGEV_NONE;

  cbp_fsync[0] = &cbs_fsync;

  /* Remove the test file contents first.  */

  if (ftruncate (fd, 0) < 0)

    {

      error (0, errno, "ftruncate failed\n");

      result = 1;

    }

  /* Write again.  */

  for (cnt = 10; cnt > 0; )

    aio_write (cbp[--cnt]);

  if (aio_fsync (O_SYNC, &cbs_fsync) < 0)

    {

      error (0, errno, "aio_fsync failed\n");

      result = 1;

    }

  result |= do_wait (cbp_fsync, 1, 0);

  /* ...and test since all data should be on disk now.  */

  result |= test_file (buf, sizeof (buf), fd, "aio_fsync (aio_write)");

  /* Test aio_cancel.  */

  /* Remove the test file contents first.  */

  if (ftruncate (fd, 0) < 0)

    {

      error (0, errno, "ftruncate failed\n");

      result = 1;

    }

  /* Write again.  */

  for (cnt = 10; cnt > 0; )

    aio_write (cbp[--cnt]);

  /* Cancel all requests.  */

  if (aio_cancel (fd, NULL) == -1)

    printf ("aio_cancel (fd, NULL) cannot cancel anything\n");

  result |= do_wait (cbp, 10, ECANCELED);

  /* Another test for aio_cancel.  */

  /* Remove the test file contents first.  */

  if (ftruncate (fd, 0) < 0)

    {

      error (0, errno, "ftruncate failed\n");

      result = 1;

    }

  /* Write again.  */

  for (cnt = 10; cnt > 0; )

    {

      --cnt;

      cbp[cnt] = &cbs[cnt];

      aio_write (cbp[cnt]);

    }

  puts ("finished3");

  /* Cancel all requests.  */

  for (cnt = 10; cnt > 0; )

    if (aio_cancel (fd, cbp[--cnt]) == -1)

      /* This is not an error.  The request can simply be finished.  */

      printf ("aio_cancel (fd, cbp[%Zd]) cannot be canceled\n", cnt);

  puts ("finished2");

  result |= do_wait (cbp, 10, ECANCELED);

  puts ("finished");

  return result;

}