[PATCH 03/16] common: _scratch_mkfs_sized() for tmpfs

Theodore Ts'o
2016-02-13T17:41:16Z

From: Hugh Dickins <hughd@google.com>

Enable _scratch_mkfs_sized() for use with tmpfs, so that tests which
use this helper can now run.

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Junho Ryu <jayr@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
common/rc | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/common/rc b/common/rc
index 2d91b69..9006392 100644
--- a/common/rc
+++ b/common/rc
@@ -783,6 +783,12 @@ _scratch_pool_mkfs()
esac
}

+# Return the amount of free memory available on the system
+_free_memory_bytes()
+{
+ free -b | grep ^Mem | awk '{print $4}'
+}
+
# Create fs of certain size on scratch device
# _scratch_mkfs_sized <size in bytes> [optional blocksize]
_scratch_mkfs_sized()
@@ -813,7 +819,7 @@ _scratch_mkfs_sized()

blocks=`expr $fssize / $blocksize`

- if [ "$HOSTOS" == "Linux" ]; then
+ if [ "$HOSTOS" == "Linux" -a -b "$SCRATCH_DEV" ]; then
devsize=`blockdev --getsize64 $SCRATCH_DEV`
[ "$fssize" -gt "$devsize" ] && _notrun "Scratch device too small"
fi
@@ -849,6 +855,13 @@ _scratch_mkfs_sized()
sector_size=`blockdev --getss $SCRATCH_DEV`
$MKFS_F2FS_PROG $MKFS_OPTIONS $SCRATCH_DEV `expr $fssize / $sector_size`
;;
+ tmpfs)
+ free_mem=`_free_memory_bytes`
+ if [ "$free_mem" -lt "$fssize" ] ; then
+ _notrun "Not enough memory ($free_mem) for tmpfs with $fssize bytes"
+ fi
+ export MOUNT_OPTIONS="-o size=$fssize $TMPFS_MOUNT_OPTIONS"
+ ;;
*)
_notrun "Filesystem $FSTYP not supported in _scratch_mkfs_sized"
;;
--
2.5.0