2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright 2019 Google LLC
5 # FS QA Test generic/579
7 # Stress test for fs-verity. This tests enabling fs-verity on multiple files
8 # concurrently with concurrent readers on those files (with reads occurring
9 # before, during, and after the fs-verity enablement), while fsstress is also
10 # running on the same filesystem.
13 seqres=$RESULT_DIR/$seq
14 echo "QA output created by $seq"
18 status=1 # failure is the default!
19 trap "_cleanup; exit \$status" 0 1 2 3 15
23 # Stop all subprocesses.
24 $KILLALL_PROG -q $FSSTRESS_PROG
28 _restore_fsverity_signatures
32 # get standard environment, filters and checks
37 # remove previous $seqres.full before test
40 # real QA test starts here
43 _require_scratch_verity
44 _require_command "$KILLALL_PROG" killall
45 _disable_fsverity_signatures
47 _scratch_mkfs_verity &>> $seqres.full
50 fsv_file_size=10000000
51 nproc_enabler=$((4 * LOAD_FACTOR))
52 nproc_reader=$((6 * LOAD_FACTOR))
53 nproc_stress=$((3 * LOAD_FACTOR))
54 runtime=$((20 * TIME_FACTOR))
56 # Create the test files and start the fs-verity enabler processes.
57 for ((proc = 0; proc < nproc_enabler; proc++)); do
58 orig_file=$SCRATCH_MNT/orig$proc
59 fsv_file=$SCRATCH_MNT/fsv$proc
60 head -c $fsv_file_size /dev/urandom > $orig_file
62 while [ ! -e $tmp.done ]; do
64 cp $orig_file $fsv_file
66 # Give the readers some time to read from the file.
67 sleep 0.$((RANDOM % 100))
72 # Start the reader processes.
73 for ((proc = 0; proc < nproc_reader; proc++)); do
75 while [ ! -e $tmp.done ]; do
76 # Choose a random file for each iteration, so that
77 # sometimes multiple processes read from the same file.
78 i=$((RANDOM % nproc_enabler))
79 orig_file=$SCRATCH_MNT/orig$i
80 fsv_file=$SCRATCH_MNT/fsv$i
82 # After the copy from $orig_file to $fsv_file has
83 # completed, the contents of these two files should
84 # match, regardless of whether verity has been enabled
85 # or not yet (or is currently being enabled).
86 cmp $orig_file $fsv_file |& _filter_scratch | \
87 grep -v "SCRATCH_MNT/fsv$i: No such file or directory" | \
88 grep -v "EOF on SCRATCH_MNT/fsv$i"
90 _fsv_measure $fsv_file 2>&1 >/dev/null | \
91 grep -v "No such file or directory" | \
92 grep -v "No data available"
97 # Start a process that occasionally runs 'sync && drop_caches'. This makes more
98 # reads go through fs-verity for real, rather than just returning pagecache.
100 while [ ! -e $tmp.done ]; do
101 sleep 2.$((RANDOM % 100))
102 sync && echo 3 > /proc/sys/vm/drop_caches
106 # Start the fsstress processes.
107 $FSSTRESS_PROG $FSSTRESS_AVOID -p $nproc_stress -l 0 -d $SCRATCH_MNT/stressdir \
108 >> $seqres.full 2>&1 &
113 echo "Silence is golden"