On Mon, Mar 21, 2016 at 11:39:14AM -0300, Christian Robottom Reis wrote:
> indeed does not return any information pertaining NFS client locks, and
> I'm not clear whether /proc/locks (on the server side obviously) does or
> not.
Somewhat OT, but I find it a PITA that /proc/locks gives inode numbers
that then need to be looked up individually. I have often been surprised
no tool exists to parse that and give you back a report of filenames, so
I just put together a small tool that just offloads the work to debugfs.
I've attached it in case others might find it useful.
(Interestingly, in a network of Ubuntu desktops, the long-term remote lock
holders are basically Spotify, Firefox and Zeitgeist, of which the
latter two are essentially sqlite.)
--
Christian Robottom Reis | [+55 16] 3376 0125 | http://async.com.br/~kiko
| [+55 16] 991 126 430 | http://launchpad.net/~kiko
#!/usr/bin/env python3
import os
import sys
import subprocess
import io
locksdb = open("/proc/locks")
device_inodes = {}
for lockline in locksdb:
lock_inode_raw = lockline.split()[5]
lock_inode = lock_inode_raw.split(":")
if len(lock_inode) < 3:
#print("Ignoring %s" % lock_inode)
continue
device = tuple(map(int,lock_inode[0:2]))
try:
target_device = os.readlink("/sys/dev/block/%s:%s" % device)
target_device = target_device.split("/")[-1]
except OSError:
#print("Device %s:%s not found" % device)
continue
inode = lock_inode[2]
if not device_inodes.get(target_device):
device_inodes[target_device] = []
device_inodes[target_device].append(inode)
for device in device_inodes:
print("-> Inodes on %s" % device)
inode_input = []
for inode in device_inodes[device]:
inode_input.append("ncheck %s" % inode)
debugfs = subprocess.Popen(['debugfs', '/dev/%s' % device],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
debugfs_input = "\n".join(inode_input)
out, err = debugfs.communicate(input=debugfs_input.encode())
debugfs_output = out.decode()
for line in debugfs_output.split("\n"):
if line.startswith("debugfs:"):
continue
if line.startswith("Inode"):
continue
print(line)
