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Sender: Anna Schumaker <schumakeranna@gmail.com>
From:   schumaker.anna@gmail.com
To:     steved@redhat.com, linux-nfs@vger.kernel.org
Cc:     Anna.Schumaker@Netapp.com
Subject: [PATCH v3 1/9] nfssysfs: Add a nfssysfs.py tool
Date:   Mon, 30 Aug 2021 11:56:45 -0400
Message-Id: <20210830155653.1386161-2-Anna.Schumaker@Netapp.com>
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From: Anna Schumaker <Anna.Schumaker@Netapp.com>

This will be used to print and manipulate the sunrpc sysfs directory
files. Running without arguments prints both usage information and the
location of the sunrpc sysfs directory.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
v3: Check for type: "sysfs" as the third column in the /proc/mounts file
    Rename from nfs-sysfs.py to nfssysfs.py
---
 .gitignore                 |  2 ++
 tools/nfssysfs/nfssysfs.py | 13 +++++++++++++
 tools/nfssysfs/sysfs.py    | 19 +++++++++++++++++++
 3 files changed, 34 insertions(+)
 create mode 100755 tools/nfssysfs/nfssysfs.py
 create mode 100644 tools/nfssysfs/sysfs.py

diff --git a/.gitignore b/.gitignore
index c89d1cd2583d..a476bd20bc3b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -84,3 +84,5 @@ systemd/rpc-gssd.service
 cscope.*
 # generic editor backup et al
 *~
+# python bytecode
+__pycache__
diff --git a/tools/nfssysfs/nfssysfs.py b/tools/nfssysfs/nfssysfs.py
new file mode 100755
index 000000000000..8ff59ea9e81b
--- /dev/null
+++ b/tools/nfssysfs/nfssysfs.py
@@ -0,0 +1,13 @@
+#!/usr/bin/python
+import argparse
+import sysfs
+
+parser = argparse.ArgumentParser()
+
+def show_small_help(args):
+    parser.print_usage()
+    print("sunrpc dir:", sysfs.SUNRPC)
+parser.set_defaults(func=show_small_help)
+
+args = parser.parse_args()
+args.func(args)
diff --git a/tools/nfssysfs/sysfs.py b/tools/nfssysfs/sysfs.py
new file mode 100644
index 000000000000..c9d477063585
--- /dev/null
+++ b/tools/nfssysfs/sysfs.py
@@ -0,0 +1,19 @@
+import pathlib
+import re
+import sys
+
+MOUNT = None
+with open("/proc/mounts", 'r') as f:
+    for line in f:
+        if re.search("^sys ", line):
+            MOUNT = line.split()[1]
+            break
+
+if MOUNT == None:
+    print("ERROR: sysfs is not mounted")
+    sys.exit(1)
+
+SUNRPC = pathlib.Path(MOUNT) / "kernel" / "sunrpc"
+if not SUNRPC.is_dir():
+    print("ERROR: sysfs does not have sunrpc directory")
+    sys.exit(1)
-- 
2.33.0