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 $seqres.full before test
40 # real QA test starts here
42 _require_scratch_verity
43 _require_command "$KILLALL_PROG" killall
44 _disable_fsverity_signatures
46 _scratch_mkfs_verity &>> $seqres.full
49 fsv_file_size=10000000
50 nproc_enabler=$((4 * LOAD_FACTOR))
51 nproc_reader=$((6 * LOAD_FACTOR))
52 nproc_stress=$((3 * LOAD_FACTOR))
53 runtime=$((20 * TIME_FACTOR))
55 # Create the test files and start the fs-verity enabler processes.
56 for ((proc = 0; proc < nproc_enabler; proc++)); do
57 orig_file=$SCRATCH_MNT/orig$proc
58 fsv_file=$SCRATCH_MNT/fsv$proc
59 head -c $fsv_file_size /dev/urandom > $orig_file
61 while [ ! -e $tmp.done ]; do
63 cp $orig_file $fsv_file
65 # Give the readers some time to read from the file.
66 sleep 0.$((RANDOM % 100))
71 # Start the reader processes.
72 for ((proc = 0; proc < nproc_reader; proc++)); do
74 while [ ! -e $tmp.done ]; do
75 # Choose a random file for each iteration, so that
76 # sometimes multiple processes read from the same file.
77 i=$((RANDOM % nproc_enabler))
78 orig_file=$SCRATCH_MNT/orig$i
79 fsv_file=$SCRATCH_MNT/fsv$i
81 # After the copy from $orig_file to $fsv_file has
82 # completed, the contents of these two files should
83 # match, regardless of whether verity has been enabled
84 # or not yet (or is currently being enabled).
85 cmp $orig_file $fsv_file |& _filter_scratch | \
86 grep -v "SCRATCH_MNT/fsv$i: No such file or directory" | \
87 grep -v "EOF on SCRATCH_MNT/fsv$i"
89 _fsv_measure $fsv_file 2>&1 >/dev/null | \
90 grep -v "No such file or directory" | \
91 grep -v "No data available"
96 # Start a process that occasionally runs 'sync && drop_caches'. This makes more
97 # reads go through fs-verity for real, rather than just returning pagecache.
99 while [ ! -e $tmp.done ]; do
100 sleep 2.$((RANDOM % 100))
101 sync && echo 3 > /proc/sys/vm/drop_caches
105 # Start the fsstress processes.
106 $FSSTRESS_PROG $FSSTRESS_AVOID -p $nproc_stress -l 0 -d $SCRATCH_MNT/stressdir \
107 >> $seqres.full 2>&1 &
112 echo "Silence is golden"