[PATCH v6 4/9] rpcctl: Add a command for printing rpc client information

[schumaker.anna@gmail.com]

From: Anna Schumaker <Anna.Schumaker@Netapp.com>

It's mostly the same information as with xprt-switches, except with
rpc-client id prepended to the first line.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
v6: Squash into a single file
---
 tools/rpcctl/rpcctl.py | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/tools/rpcctl/rpcctl.py b/tools/rpcctl/rpcctl.py
index ae338e06f802..169a2a3c0ef9 100755
--- a/tools/rpcctl/rpcctl.py
+++ b/tools/rpcctl/rpcctl.py
@@ -87,10 +87,11 @@ class Xprt:
 
 
 class XprtSwitch:
-    def __init__(self, path):
+    def __init__(self, path, sep=":"):
         self.path = path
         self.id = int(path.stem.split("-")[1])
         self.info = read_info_file(path / "xprt_switch_info")
+        self.sep = sep
 
         self.xprts = [ Xprt(p) for p in self.path.iterdir() if p.is_dir() ]
         self.xprts.sort()
@@ -99,7 +100,7 @@ class XprtSwitch:
         return self.id < rhs.id
 
     def __str__(self):
-        switch =  f"switch {self.id}: " \
+        switch =  f"switch {self.id}{self.sep} " \
                   f"xprts {self.info['num_xprts']}, " \
                   f"active {self.info['num_active']}, " \
                   f"queue {self.info['queue_len']}"
@@ -119,6 +120,32 @@ class XprtSwitch:
                 print(xs)
 
 
+class RpcClient:
+    def __init__(self, path):
+        self.path = path
+        self.id = int(path.stem.split("-")[1])
+        self.switch = XprtSwitch(path / (path / "switch").readlink(), sep=",")
+
+    def __lt__(self, rhs):
+        return self.id < rhs.id
+
+    def __str__(self):
+        return f"client {self.id}: {self.switch}"
+
+    def add_command(subparser):
+        parser = subparser.add_parser("client", help="Commands for rpc clients")
+        parser.add_argument("--id", metavar="ID", nargs=1, type=int, help="Id of a specific client to show")
+        parser.set_defaults(func=RpcClient.list_all)
+
+    def list_all(args):
+        clients = [ RpcClient(f) for f in (sunrpc / "rpc-clients").iterdir() ]
+        clients.sort()
+        for client in clients:
+            if args.id == None or client.id == args.id[0]:
+                print(client)
+
+
+
 parser = argparse.ArgumentParser()
 
 def show_small_help(args):
@@ -127,6 +154,7 @@ def show_small_help(args):
 parser.set_defaults(func=show_small_help)
 
 subparser = parser.add_subparsers(title="commands")
+RpcClient.add_command(subparser)
 XprtSwitch.add_command(subparser)
 Xprt.add_command(subparser)
 
-- 
2.34.1