diff options
| author | Filipe Manana <fdmanana@suse.com> | 2020-06-12 15:06:03 +0100 |
|---|---|---|
| committer | Eryu Guan <guaneryu@gmail.com> | 2020-06-21 22:34:04 +0800 |
| commit | a38e45b19d1e517d2952aaedee07f9cf73444e83 (patch) | |
| tree | a494cdb46b589b22daa261fc7601b70a22e50edc | |
| parent | d6367ec8d2c603f43f5f5dba2d075892e4c3222f (diff) | |
generic/471: adapt test when running on btrfs to avoid failure on RWF_NOWAIT write
This test currently always fails on btrfs:
generic/471 2s ... - output mismatch (see ...results//generic/471.out.bad)
--- tests/generic/471.out 2020-06-10 19:29:03.850519863 +0100
+++ /home/fdmanana/git/hub/xfstests/results//generic/471.out.bad ...
@@ -2,12 +2,10 @@
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.
+pwrite: Resource temporarily unavailable
+(standard_in) 1: syntax error
+RWF_NOWAIT took seconds
This is because btrfs is a COW filesystem and an attempt to write into a
previously written file range allocating a new extent (or multiple).
The only exceptions are when attempting to write to a file range with a
preallocated/unwritten extent or when writing to a NOCOW file that has
extents allocated in the target range already.
The test currently expects that writing into a previously written file
range succeeds, but that is not true on btrfs since we are not dealing
with a NOCOW file. So to make the test pass on btrfs, set the NOCOW bit
on the file when the filesystem is btrfs.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
| -rwxr-xr-x | tests/generic/471 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tests/generic/471 b/tests/generic/471 index 7513f023..e9856b52 100755 --- a/tests/generic/471 +++ b/tests/generic/471 @@ -37,6 +37,17 @@ fi mkdir $testdir +# Btrfs is a COW filesystem, so a RWF_NOWAIT write will always fail with -EAGAIN +# when writing to a file range except if it's a NOCOW file and an extent for the +# range already exists or if it's a COW file and preallocated/unwritten extent +# exists in the target range. So to make sure that the last write succeeds on +# all filesystems, use a NOCOW file on btrfs. +if [ $FSTYP == "btrfs" ]; then + _require_chattr C + touch $testdir/f1 + $CHATTR_PROG +C $testdir/f1 +fi + # 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 |