sysdeps/unix/sysv/linux/tst-sync_file_range.c

   1 /* Basic sync_file_range (not specific flag is checked).
   2    Copyright (C) 2016-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /* sync_file_range is only define for LFS.  */
  20 #define _FILE_OFFSET_BITS 64
  21 #include <errno.h>
  22 #include <fcntl.h>
  23 #include <limits.h>
  24 #include <stdint.h>
  25 #include <stdlib.h>
  26 #include <sys/stat.h>
  27
  28 #include <support/temp_file.h>
  29 #include <support/check.h>
  30
  31 #define XSTR(s) STR(S)
  32 #define STR(s)  #s
  33
  34 static char *temp_filename;
  35 static int temp_fd;
  36
  37 static char fifoname[] = "/tmp/tst-posix_fadvise-fifo-XXXXXX";
  38 static int fifofd;
  39
  40 void
  41 do_prepare (int argc, char **argv)
  42 {
  43   temp_fd = create_temp_file ("tst-file_sync_range.", &temp_filename);
  44   if (temp_fd == -1)
  45     FAIL_EXIT1 ("cannot create temporary file: %m");
  46
  47   if (mktemp (fifoname) == NULL)
  48     FAIL_EXIT1 ("cannot generate temp file name: %m");
  49   add_temp_file (fifoname);
  50
  51   if (mkfifo (fifoname, S_IWUSR | S_IRUSR) != 0)
  52     FAIL_EXIT1 ("cannot create fifo: %m");
  53
  54   fifofd = open (fifoname, O_RDONLY | O_NONBLOCK);
  55   if (fifofd == -1)
  56     FAIL_EXIT1 ("cannot open fifo: %m");
  57 }
  58 #define PREPARE do_prepare
  59
  60 static int
  61 do_test (void)
  62 {
  63   int ret;
  64
  65   /* This tests first check for some invalid usage and then check for
  66      a simple usage.  It does not cover for all possible issue since for
  67      EIO/ENOMEM/ENOSPC would require to create very specific scenarios that
  68      are outside the current test coverage (basically correct kernel argument
  69      passing.  */
  70
  71   /* Check for invalid file descriptor.  */
  72   if ((ret = sync_file_range (-1, 0, 0, 0)) != -1)
  73     FAIL_EXIT1 ("sync_file_range did not fail on an invalid descriptor "
  74                 "(returned %d, expected -1)", ret);
  75   if (errno != EBADF)
  76     FAIL_EXIT1 ("sync_file_range on an invalid descriptor did not set errno to "
  77                 "EBADF (%d)", errno);
  78
  79   if ((ret = sync_file_range (fifofd, 0, 0, 0)) != -1)
  80     FAIL_EXIT1 ("sync_file_range did not fail on an invalid descriptor "
  81                 "(returned %d, expected -1)", ret);
  82   if (errno != ESPIPE)
  83     FAIL_EXIT1 ("sync_file_range on an invalid descriptor did not set errno to "
  84                 "EBADF (%d)", errno);
  85
  86   /* Check for invalid flags (it must be
  87      SYNC_FILE_RANGE_{WAIT_BEFORE,WRITE,WAIT_AFTER) or a 'or' combination of
  88      them.  */
  89   if ((ret = sync_file_range (temp_fd, 0, 0, -1)) != -1)
  90     FAIL_EXIT1 ("sync_file_range did not failed with invalid flags "
  91                 "(returned %d, " "expected -1)", ret);
  92   if (errno != EINVAL)
  93     FAIL_EXIT1 ("sync_file_range with invalid flag did not set errno to "
  94                 "EINVAL (%d)", errno);
  95
  96   /* Check for negative offset.  */
  97   if ((ret = sync_file_range (temp_fd, -1, 1, 0)) != -1)
  98     FAIL_EXIT1 ("sync_file_range did not failed with invalid offset "
  99                 "(returned %d, expected -1)", ret);
 100   if (errno != EINVAL)
 101     FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
 102                 "EINVAL (%d)", errno);
 103
 104   /* offset + nbytes must be a positive value.  */
 105   if ((ret = sync_file_range (temp_fd, 1024, -2048, 0)) != -1)
 106     FAIL_EXIT1 ("sync_file_range did not failed with invalid nbytes (returned %d, "
 107           "expected -1)", ret);
 108   if (errno != EINVAL)
 109     FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
 110                 "EINVAL (%d)", errno);
 111
 112   /* offset + nbytes must be larger or equal than offset */
 113   if ((ret = sync_file_range (temp_fd, -1024, 1024, 0)) != -1)
 114     FAIL_EXIT1 ("sync_file_range did not failed with invalid offset "
 115                 "(returned %d, expected -1)", ret);
 116   if (errno != EINVAL)
 117     FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
 118                 "EINVAL (%d)", errno);
 119
 120   /* Check simple successful case.  */
 121   if ((ret = sync_file_range (temp_fd, 0, 1024, 0)) == -1)
 122     FAIL_EXIT1 ("sync_file_range failed (errno = %d)", errno);
 123
 124   /* Finally check also a successful case with a 64-bit offset.  */
 125   off_t large_offset = UINT32_MAX + 2048LL;
 126   if ((ret = sync_file_range (temp_fd, large_offset, 1024, 0)) == -1)
 127     FAIL_EXIT1 ("sync_file_range failed (errno = %d)", errno);
 128
 129   return 0;
 130 }
 131
 132 #include <support/test-driver.c>