Tool function issues: Please validate args errors for '-p' and '--path', in
or following validate_args_path().
Comments of functionality:
- it's confusing when fuzz_testing are all OFF, then user run ' python3
/home/lisa/vmbus_testing -p
/sys/kernel/debug/hyperv/000d3a6e-4548-000d-3a6e-4548000d3a6e delay -d 0 0 -D '
which will enable all delay testing state ('Y' in state files). even I used
"-D", "--dis_all" param.
- if we have subparsers of "disable-all" for the testing tool, then
probably we don't need the mutually_exclusive_group under subparsers of "delay"
- the path argument (-p) could be an argument for subparsers of "delay"
and "view" only.
Regards,
Harry
-Original Message-
From: linux-hyperv-ow...@vger.kernel.org
On Behalf Of Branden Bonaby
Sent: Tuesday, August 20, 2019 4:40 PM
To: KY Srinivasan ; Haiyang Zhang ;
Stephen Hemminger ; sas...@kernel.org
Cc: brandonbonaby94 ; linux-hyp...@vger.kernel.org;
linux-kernel@vger.kernel.org
Subject: [PATCH v3 3/3] tools: hv: add vmbus testing tool
This is a userspace tool to drive the testing. Currently it supports
introducing user specified delay in the host to guest communication path on a
per-channel basis.
Signed-off-by: Branden Bonaby
---
Changes in v3:
- Align python tool to match Linux coding style.
Changes in v2:
- Move testing location to new location in debugfs.
tools/hv/vmbus_testing | 342 +
1 file changed, 342 insertions(+)
create mode 100644 tools/hv/vmbus_testing
diff --git a/tools/hv/vmbus_testing b/tools/hv/vmbus_testing new file mode
100644 index ..0f249f6ee698
--- /dev/null
+++ b/tools/hv/vmbus_testing
@@ -0,0 +1,342 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+#
+# Program to allow users to fuzz test Hyper-V drivers # by interfacing
+with Hyper-V debugfs directories # author: Branden Bonaby
+
+import os
+import cmd
+import argparse
+from collections import defaultdict
+from argparse import RawDescriptionHelpFormatter
+
+# debugfs paths for vmbus must exist (same as in lsvmbus)
+debugfs_sys_path = "/sys/kernel/debug/hyperv"
+if not os.path.isdir(debugfs_sys_path):
+print("{} doesn't exist/check permissions".format(debugfs_sys_path))
+exit(-1)
+# Do not change unless, you change the debugfs attributes # in
+"/sys/kernel/debug/hyperv//". All fuzz testing # attributes will
+start with "fuzz_test".
+pathlen = len(debugfs_sys_path)
+fuzz_state_location = "fuzz_test_state"
+fuzz_states = {
+0 : "Disable",
+1 : "Enable"
+}
+
+fuzz_methods = {
+1 : "Delay_testing"
+}
+
+fuzz_delay_types = {
+1 : "fuzz_test_buffer_interrupt_delay",
+2 : "fuzz_test_message_delay"
+}
+
+def parse_args():
+parser = argparse.ArgumentParser(description = "vmbus_testing "
+"[-s] [0|1] [-q] [-p] \n""vmbus_testing [-s]"
+" [0|1] [-q][-p] delay [-d] [val][val]
[-E|-D]\n"
+"vmbus_testing [-q] disable-all\n"
+"vmbus_testing [-q] view [-v|-V]\n"
+"vmbus_testing --version",
+epilog = "Current testing options {}".format(fuzz_methods),
+prog = 'vmbus_testing',
+formatter_class = RawDescriptionHelpFormatter)
+subparsers = parser.add_subparsers(dest = "action")
+parser.add_argument("--version", action = "version",
+version = '%(prog)s 1.0')
+parser.add_argument("-q","--quiet", action = "store_true",
+help = "silence none important test messages")
+parser.add_argument("-s","--state", metavar = "", type = int,
+choices = range(0, 2),
+help = "Turn testing ON or OFF for a single device."
+" The value (1) will turn testing ON. The value"
+" of (0) will turn testing OFF with the default set"
+" to (0).")
+parser.add_argument("-p","--path", metavar = "",
+help = "Refers to the debugfs path to a vmbus device."
+" If the path is not a valid path to a vmbus device,"
+" the program will exit. The path must be the"
+" absolute path; use the lsvmbus command to find"
+" the path.")
+parser_delay = subparsers.add_parser("delay",
+help = "Delay buffer/message reads in microseconds.",
+description = "vmbus_testing -s [0|1] [-q] -p "
+" delay -d "
+"[buffer-delay-value] [message-delay-value]\n"
+"vmbus_testing [-q] delay [buffer-delay-value] "
+"[message-delay-value] -E\n"
+"vmbus_testing [-q] delay [buffer-delay-value] "
+
