3 # Copyright (C) 2018 Red Hat Inc.
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions are
9 # * Redistributions of source code must retain the above copyright
10 # notice, this list of conditions and the following disclaimer.
12 # * Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in the
14 # documentation and/or other materials provided with the distribution.
16 # * Neither the name of Red Hat nor the names of its contributors may be
17 # used to endorse or promote products derived from this software without
18 # specific prior written permission.
20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
24 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
27 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
28 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 # Check that this is a Linux-like system supporting /proc/$pid/fd.
39 requires
test -d /proc
/self
/fd
40 requires qemu-io
--version
41 # Need the stat, cut, tr commands from coreutils.
42 requires
$STAT --version
43 requires
$CUT --version
46 sock
=$
(mktemp
-u /tmp
/nbdkit-test-sock.XXXXXX
)
51 cleanup_fn
rm -f $sock
53 # Create a cache directory.
58 # Create an empty base image.
59 $TRUNCATE -s 1G
$d/cache-max-size.img
61 # Run nbdkit with the caching filter and a low size limit to ensure
62 # that the reclaim code is exercised.
63 start_nbdkit
-P $d/cache-max-size.pid
-U $sock \
65 file $d/cache-max-size.img \
66 cache-max-size
=10M cache-on-read
=true
68 # Write > 10M to the plugin.
69 qemu-io
-f raw
"nbd+unix://?socket=$sock" \
76 # We can't use ‘du’ on the cache directory because the cache file is
77 # deleted by the filter, and so is only accessible via /proc/$pid/fd.
78 # Get the /proc link to the cache file, and the size of it in bytes.
79 fddir
="/proc/$( cat $d/cache-max-size.pid )/fd"
80 LANG
=C
ls -ln $fddir ||
:
81 fd
="$fddir/$( LANG=C ls -ln $fddir | grep $TMPDIR/ | head -1 |
82 tr -s ' ' | $CUT -d ' ' -f 9 )"
84 size
=$
(( $
($STAT -L -c '%b * %B' $fd) ))
86 if [ "$size" -gt $
(( 11 * 1024 * 1024 )) ]; then
87 echo "$0: cache size is larger than 10M (actual size: $size bytes)"