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common: new function to get real device path name and basename

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If TEST_DEV or SCRATCH_DEV is symlink(mostly a lvm lv), a simple
basename is not enough, symlink should be followed.

This task is common enough, so introduce new helper functions and
replace all readlink calls in

ext4/305
generic/009
generic/019
generic/285
generic/312

Signed-off-by: Eryu Guan <eguan@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Eryu Guan
2014-05-13 09:05:43 +10:00
committed by Dave Chinner
parent 9f3515572c
commit ec08236ff7
6 changed files with 21 additions and 7 deletions
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tests/generic/009
+1 -1
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@@ -50,7 +50,7 @@ testfile=$TEST_DIR/009.$$
# Disable extent zeroing for ext4 as that change where holes are created
if [ "$FSTYP" = "ext4" ]; then
DEV=`basename $TEST_DEV`
DEV=`_short_dev $TEST_DEV`
echo 0 >/sys/fs/ext4/$DEV/extent_max_zeroout_kb
fi