Helper that creates files of specified size using falloc if supported,
otherwise pwrite is used.
Signed-off-by: Pavel Reichl <preichl@xxxxxxxxxx>
---
common/rc | 22 ++++++++++++++++++++++
tests/generic/694 | 8 +++++++-
2 files changed, 29 insertions(+), 1 deletion(-)
diff --git a/common/rc b/common/rc
index a25cbcd0..3d4587b7 100644
--- a/common/rc
+++ b/common/rc
@@ -4925,6 +4925,28 @@ hexdump()
_fail "Use _hexdump(), please!"
}
+# Try to create a file with inode->i_blocks = $length. There may be some small
+# overhead, e.g. ext2 filesystem allocates a substantial number of blocks
+# to store block mappings. Those are accounted to i_blocks.
+_create_file_sized()
+{
+ local length=$1
+ local file=$2
+ local tmp=`mktemp -u`
+ local ret=0
+
+ $XFS_IO_PROG -ft -c "falloc 0 $length" $file >$tmp.out 2>&1
+ ret=$?
+ if (grep -Eq "Operation not supported|command .* not found" $tmp.out);then
+ # fallocate isn't supported, fallback to general buffer write
+ $XFS_IO_PROG -ft -c "pwrite 0 $length" $file >$tmp.out 2>&1
+ ret=$?
+ fi
+ [ $ret -ne 0 ] && cat $tmp.out
+ rm -f $tmp.out
+ return $ret
+}
+
init_rc
################################################################################
diff --git a/tests/generic/694 b/tests/generic/694
index dfd988df..09fb9e71 100755
--- a/tests/generic/694
+++ b/tests/generic/694
@@ -21,6 +21,9 @@ _cleanup()
}
_supported_fs generic
+_fixed_by_kernel_commit 0c336d6e33f4 \
+ "exfat: fix incorrect loading of i_blocks for large file"
+
_require_test
_require_fs_space $TEST_DIR $((4 * 1024 * 1024)) #kB
@@ -30,7 +33,10 @@ junk_dir=$TEST_DIR/$seq
junk_file=$junk_dir/junk
mkdir -p $junk_dir
-$XFS_IO_PROG -f -c "pwrite -W 0 4G" $junk_file > /dev/null
+_create_file_sized 4G $junk_file
+if [ $? -ne 0 ]; then
+ echo "_create_file_sized failed"
+fi
iblocks=`stat -c '%b' $junk_file`
--
2.37.3
