This changes quite a few things about 274 to make it more robust
and useful.
* More comments
* Use xfs_io for falloc (not all systems have /usr/bin/fallocate)
* use _require_xfs_io_falloc to be sure system & fs support preallocation
* Do not remove all of the files in $SCRATCH_MNT/ post-mkfs
* Do not remove all of the files in $SCRATCH_MNT/ on completion
(this breaks e2fsck when lost+found/ goes missing)
* Don't cd into $SCRATCH_MNT
* Try harder to completely fill the fs
* Use a larger preallocated space, and write into all of it (hopefully
avoid just accidentally succeeding by writing into fs reserved
space that may be there)
* Save more output in $seq.full instead of /dev/null
* Fill preallocated space diabolically
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
---
V2: Several fixes suggested by Dave.
Also fills prealloc space diabolically. This fails on ext4.
diff --git a/274 b/274
index b658004..bba5eb4 100755
--- a/274
+++ b/274
@@ -1,7 +1,9 @@
#! /bin/bash
# FS QA Test No. 274
#
-# preallocation test
+# preallocation test:
+# Preallocate space to a file, and fill the rest of the fs to 100%.
+# Then test a write into that preallocated space, which should succeed.
#
#-----------------------------------------------------------------------
# Copyright (c) 2011-2012 Fujitsu, Inc. All Rights Reserved.
@@ -35,7 +37,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
_cleanup()
{
cd /
- rm -f $SCRATCH_MNT/* $tmp.*
+ rm -f $tmp.*
_scratch_unmount
}
@@ -46,6 +48,7 @@ _cleanup()
_supported_fs generic
_supported_os IRIX Linux
_require_scratch
+_require_xfs_io_falloc
echo "------------------------------"
echo "preallocation test"
@@ -57,35 +60,42 @@ umount $SCRATCH_DEV 2>/dev/null
_scratch_mkfs_sized $((1 * 1024 * 1024 * 1024)) >>$seq.full 2>&1
_scratch_mount
-rm -rf $SCRATCH_MNT/*
-cd $SCRATCH_MNT
-dd if=/dev/zero of=test bs=4K count=1 >/dev/null 2>&1
-if [ $? -ne 0 ]
-then
- echo "create file err"
- status=1
- exit
-fi
+# Create a 4k file and Allocate 4M past EOF on that file
+xfs_io -F -f -c "pwrite 0 4k" -c "falloc -k 4k 4m" $SCRATCH_MNT/test \
+ >>$seq.full 2>&1 || _fail "failed to create test file"
-fallocate -n -o 4K -l 1M test >/dev/null 2>&1
-if [ $? -ne 0 ]
-then
- echo "fallocate file err"
- status=1
- exit
-fi
-
-dd if=/dev/zero of=tmp1 bs=1M >/dev/null 2>&1
-dd if=/dev/zero of=tmp2 bs=4K >/dev/null 2>&1
+# Fill the rest of the fs completely
+# Note, this will show ENOSPC errors in $seq.full, that's ok.
+echo "Fill fs with 1M IOs; EIO expected" >> $seq.full
+dd if=/dev/zero of=$SCRATCH_MNT/tmp1 bs=1M >>$seq.full 2>&1
+echo "Fill fs with 4K IOs; EIO expected" >> $seq.full
+dd if=/dev/zero of=$SCRATCH_MNT/tmp2 bs=4K >>$seq.full 2>&1
sync
+# Last effort, use O_SYNC
+echo "Fill fs with 4K DIOs; EIO expected" >> $seq.full
+dd if=/dev/zero of=$SCRATCH_MNT/tmp3 bs=4K oflag=sync >>$seq.full 2>&1
+# Save space usage info
+echo "Post-fill space:" >> $seq.full
+df $SCRATCH_MNT >>$seq.full 2>&1
-dd if=/dev/zero of=test seek=1 bs=4K count=2 conv=notrunc >/dev/null 2>&1
-if [ $? -ne 0 ]
-then
- echo "fill prealloc range err"
- status=1
- exit
-fi
+# Now attempt a write into all of the preallocated space -
+# in a very nasty way, badly fragmenting it and then filling it in.
+echo "Fill in prealloc space; fragment at offsets:" >> $seq.full
+for i in `seq 1 2 1023`; do
+ echo -n "$i " >> $seq.full
+ dd if=/dev/zero of=$SCRATCH_MNT/test seek=$i bs=4K count=1 conv=notrunc \
+ >>$seq.full 2>/dev/null || _fail "failed to write to test file"
+done
+sync
+echo >> $seq.full
+echo "Fill in prealloc space; fill holes at offsets:" >> $seq.full
+for i in `seq 2 2 1023`; do
+ echo -n "$i " >> $seq.full
+ dd if=/dev/zero of=$SCRATCH_MNT/test seek=$i bs=4K count=1 conv=notrunc \
+ >>$seq.full 2>/dev/null || _fail "failed to fill test file"
+done
+sync
+echo >> $seq.full
echo "done"
exit
--
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