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author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2017-12-07 10:00:43 -0600 |
---|---|---|
committer | Eryu Guan <eguan@redhat.com> | 2017-12-14 12:39:57 +0800 |
commit | 6a2fd57fb82167d33d5d51a783468fd6e5a06186 (patch) | |
tree | 2d4d8b145b80e1e6ed82d7a3937e50a93fb24e4d | |
parent | eef2209b4fdbff96b57b819ab7a808373680c914 (diff) | |
download | xfstests-6a2fd57fb82167d33d5d51a783468fd6e5a06186.tar.gz |
generic: Test RWF_NOWAIT
Tests the RWF_NOWAIT flag so the I/O returns immediately with
-EAGAIN on a new file since it requires block allocation.
It creates a file, syncs it, and overwrites the file with
RWF_NOWAIT. This should succeed.
Finally, read the contents to make sure the overwrite is successful.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
-rwxr-xr-x | tests/generic/471 | 75 | ||||
-rw-r--r-- | tests/generic/471.out | 13 | ||||
-rw-r--r-- | tests/generic/group | 1 |
3 files changed, 89 insertions, 0 deletions
diff --git a/tests/generic/471 b/tests/generic/471 new file mode 100755 index 0000000000..3969a49430 --- /dev/null +++ b/tests/generic/471 @@ -0,0 +1,75 @@ +#! /bin/bash +# FS QA Test No. 471 +# +# write a file with RWF_NOWAIT and it would fail because there are no +# blocks allocated. Create a file with direct I/O and re-write it +# using RWF_NOWAIT. I/O should finish within 50 microsecods since +# block allocations are already performed. +# +#----------------------------------------------------------------------- +# Copyright (c) 2017, SUSE Linux Products. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- + +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! + +# get standard environment, filters and checks +. ./common/rc +. ./common/populate +. ./common/filter +. ./common/attr + +# real QA test starts here +_supported_os Linux +_require_odirect +_require_test +_require_xfs_io_command pwrite -N + +# Remove reminiscence of previously run tests +testdir=$TEST_DIR/$seq +if [ -e $testdir ]; then + rm -Rf $testdir +fi + +mkdir $testdir + +# Create a file with pwrite nowait (will fail with EAGAIN) +$XFS_IO_PROG -f -d -c "pwrite -N -V 1 -b 1M 0 1M" $testdir/f1 + +# Write the file without nowait +$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -W -w -V 1 -b 1M 0 8M" $testdir/f1 | _filter_xfs_io + +time_taken=`$XFS_IO_PROG -d -c "pwrite -S 0xbb -N -V 1 -b 1M 2M 1M" $testdir/f1 | awk '/^1/ {print $5}'` + +# RWF_NOWAIT should finish within a short period of time so we are choosing +# a conservative value of 50 ms. Anything longer means it is waiting +# for something in the kernel which would be a fail. +if (( $(echo "$time_taken < 0.05" | bc -l) )); then + echo "RWF_NOWAIT time is within limits." +else + echo "RWF_NOWAIT took $time_taken seconds" +fi + +$XFS_IO_PROG -c "pread -v 0 8M" $testdir/f1 | _filter_xfs_io_unique + +# success, all done +status=0 +exit diff --git a/tests/generic/471.out b/tests/generic/471.out new file mode 100644 index 0000000000..ab23272eec --- /dev/null +++ b/tests/generic/471.out @@ -0,0 +1,13 @@ +QA output created by 471 +pwrite: Resource temporarily unavailable +wrote 8388608/8388608 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +RWF_NOWAIT time is within limits. +00000000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +* +00200000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ +* +00300000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +* +read 8388608/8388608 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) diff --git a/tests/generic/group b/tests/generic/group index 1e6072225a..f777893e37 100644 --- a/tests/generic/group +++ b/tests/generic/group @@ -473,3 +473,4 @@ 468 shutdown auto quick metadata 469 auto quick 470 auto quick dax +471 auto quick rw |