[PATCH 2/5] xfs/123: fix remote symlink block size calculation

["Darrick J. Wong" <darrick.wong@oracle.com>]

From: Darrick J. Wong <darrick.wong@oracle.com>

In this test we try to create a remote symlink block by creating a
symlink target buffer large enough to exceed the size of an inode.
Unfortunately we don't use the correct block size or symlink header
size, which on a 1k block filesystem causes there to be two remote
blocks.  This causes crc verification errors in xfs_db (because it's too
dumb to load both blocks as one like the kernel does) which we don't
care about because we're about to corrupt the block anyway.

So, fix the block size calculation so that we end up with one block.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 tests/xfs/123 |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)


diff --git a/tests/xfs/123 b/tests/xfs/123
index 8a494ef9..f45e94bf 100755
--- a/tests/xfs/123
+++ b/tests/xfs/123
@@ -46,11 +46,12 @@ _scratch_mkfs_xfs > /dev/null
 
 echo "+ mount fs image"
 _scratch_mount
-blksz=1000
+blksz=1024
 
 echo "+ make some files"
 echo "file contents: moo" > "${SCRATCH_MNT}/x"
-str="$(perl -e "print './' x $(( (blksz / 2) - 16));")x"
+reps=$(( (blksz - (56 + 1)) / 2 ))
+str="$(perl -e "print './' x $reps;")x"
 (cd $SCRATCH_MNT; ln -s "${str}" "long_symlink")
 cat "${SCRATCH_MNT}/long_symlink"
 inode="$(stat -c '%i' "${SCRATCH_MNT}/long_symlink")"
@@ -60,7 +61,7 @@ echo "+ check fs"
 _scratch_xfs_repair -n >> $seqres.full 2>&1 || _fail "xfs_repair should not fail"
 
 echo "+ corrupt image"
-_scratch_xfs_db -x -c "inode ${inode}" -c "dblock 0" -c "stack" -c "blocktrash -x 32 -o 256 -y $((blksz * 8)) -z ${FUZZ_ARGS}" >> $seqres.full
+_scratch_xfs_db -x -c "inode ${inode}" -c "dblock 0" -c "stack" -c "blocktrash -x 32 -o 256 -y $((blksz * 4)) -z ${FUZZ_ARGS}" >> $seqres.full
 
 echo "+ mount image"
 if _try_scratch_mount >> $seqres.full 2>&1; then