2020-04-28 16:52:43

by Achilles Gaikwad

[permalink] [raw]
Subject: [PATCH] nfs-utils: add new tool nfsd4-show to parse output from proc files

This tool parses the output from the following files

/proc/fs/nfsd/clients/*/{states,info}

- Tool has the following parameters so far:

~~~
$ /usr/sbin/nfsd4-show -h
usage: nfsd4-show [-h] [-t type] [--clientinfo] [--hostname] [-q]

Parse the nfsd states and clientinfo files.

optional arguments:
-h, --help show this help message and exit
-t type, --type type Input the type that you want to be printed: open,
lock, deleg, layout, all
--clientinfo output clients information, --hostname is implied.
--hostname print hostname of client instead of its ip address.
Longer hostnames are truncated.
-q, --quiet don't print the header information
~~~

- This tool enables the output to have both ip address and filaname[1]

~~~
Inode number | Type | ip address | Filename
33811576 | lock | [::1]:682 | foobar
~~~

- You can also display just the open files

~~~
Inode number | Type | Access | Deny | ip address | Filename
:::
226493407 | open | r- | -- | 10.65.211.137:708 | 999
226493409 | open | r- | -- | 10.65.211.137:708 | ff
226493410 | open | r- | -- | 10.65.211.137:708 | foo
226493413 | open | r- | -- | 10.65.211.137:708 | open_lock.py
33811575 | open | r- | -- | [::1]:682 | file
33811576 | open | rw | -- | [::1]:682 | foobar
:::
~~~

- Handles disconnected dentries from userspace by showing filename as :

~~~
Inode number | Type | Access | Deny | ip address | Filename
:::
226493409 | open | r- | -- | 10.65.211.66:867 | disconnected dentry
226493409 | deleg | r | | 10.65.211.66:867 | disconnected dentry
226493410 | open | r- | -- | 10.65.211.66:867 | disconnected dentry
226493410 | deleg | r | | 10.65.211.66:867 | disconnected dentry
~~~

- Automatically drop the deny column for delegation

~~~
Inode number | Type | Access | ip address | Filename
226726004 | deleg | r | 10.65.211.137:708 | foo
226726013 | deleg | r | 10.65.211.137:708 | bar
~~~

- clientinfo would show the version of nfs that the client has mounted the share with

the client id.

~~~
Inode number | Type | Access | Deny | ip address | Client ID | vers | Filename
226726004 | open | r- | -- | 10.65.211.137:708 | 0xf2924e155ea84ae8 | 4.2 | foo
226726004 | deleg | r | | 10.65.211.137:708 | 0xf2924e155ea84ae8 | 4.2 | foo
~~~

- hostname option would show the hostname instead of ip addresses

~~~
Inode number | Type | Access | Deny | Hostname | Filename
227054876 | open | r- | -- | vm137 | fubar
~~~

If you do not like the header, please use the -q option.

Your feedback and review is highly apprecaited!

You will need the following patch for filename to be displayed:
[1] https://www.spinics.net/lists/linux-nfs/msg77332.html

Signed-off-by: Achilles Gaikwad <[email protected]>
Signed-off-by: Kenneth D'souza <[email protected]>
---
configure.ac | 1 +
tools/Makefile.am | 2 +-
tools/nfsd4-show/Makefile.am | 9 ++
tools/nfsd4-show/nfsd4-show.py | 219 +++++++++++++++++++++++++++++++++
4 files changed, 230 insertions(+), 1 deletion(-)
create mode 100644 tools/nfsd4-show/Makefile.am
create mode 100755 tools/nfsd4-show/nfsd4-show.py

diff --git a/configure.ac b/configure.ac
index 00b32800..366f9b7c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -689,6 +689,7 @@ AC_CONFIG_FILES([
tools/rpcgen/Makefile
tools/mountstats/Makefile
tools/nfs-iostat/Makefile
+ tools/nfsd4-show/Makefile
tools/nfsconf/Makefile
tools/clddb-tool/Makefile
utils/Makefile
diff --git a/tools/Makefile.am b/tools/Makefile.am
index 53e61170..3cebbe95 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -12,6 +12,6 @@ if CONFIG_NFSDCLD
OPTDIRS += clddb-tool
endif

-SUBDIRS = locktest rpcdebug nlmtest mountstats nfs-iostat $(OPTDIRS)
+SUBDIRS = nfsd4-show locktest rpcdebug nlmtest mountstats nfs-iostat $(OPTDIRS)

MAINTAINERCLEANFILES = Makefile.in
diff --git a/tools/nfsd4-show/Makefile.am b/tools/nfsd4-show/Makefile.am
new file mode 100644
index 00000000..1b57cfb2
--- /dev/null
+++ b/tools/nfsd4-show/Makefile.am
@@ -0,0 +1,9 @@
+## Process this file with automake to produce Makefile.in
+PYTHON_FILES = nfsd4-show.py
+
+all-local: $(PYTHON_FILES)
+
+install-data-hook:
+ $(INSTALL) -m 755 nfsd4-show.py $(DESTDIR)$(sbindir)/nfsd4-show
+
+MAINTAINERCLEANFILES=Makefile.in
\ No newline at end of file
diff --git a/tools/nfsd4-show/nfsd4-show.py b/tools/nfsd4-show/nfsd4-show.py
new file mode 100755
index 00000000..52775e66
--- /dev/null
+++ b/tools/nfsd4-show/nfsd4-show.py
@@ -0,0 +1,219 @@
+#!/bin/python3
+# -*- python-mode -*-
+'''
+ Copyright (C) 2020
+ Authors: Achilles Gaikwad <[email protected]>
+ Kenneth D'souza <[email protected]>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+'''
+
+import multiprocessing as mp
+import os
+import signal
+import sys
+
+try:
+ import argparse
+except ImportError:
+ print('%s: Failed to import argparse - make sure argparse is installed!'
+ % sys.argv[0])
+ sys.exit(1)
+try:
+ import yaml
+except ImportError:
+ print('%s: Failed to import yaml - make sure python3-pyyaml is installed!'
+ % sys.argv[0])
+ sys.exit(1)
+
+BBOLD = '\033[1;30;47m' #Bold black text with white background.
+ENDC = '\033[m' #Rest to defaults
+
+def init_worker():
+ signal.signal(signal.SIGINT, signal.SIG_IGN)
+
+# this function converts the info file to a dictionary format, sorta. :)
+def file_to_dict(path):
+ client_info = {}
+ with open(path) as f:
+ for line in f:
+ try:
+ (key, val) = line.split(':')
+ client_info[key] = val
+ # FIXME: There has to be a better way of converting tscrews he info file to a dictionary.
+ except ValueError:
+ try:
+ (key, val) = line.split()
+ client_info[key] = val
+ except:
+ pass
+ return client_info
+
+# this functino gets the paths from /proc/fs/nfsd/clients/
+# returns a list of paths for each client which has nfs-share mounted.
+def getpaths():
+ path = []
+ try:
+ dirs = os.listdir('/proc/fs/nfsd/clients/')
+ except OSError as reason:
+ exit('%s' % reason)
+ if len(dirs) !=0:
+ for i in dirs:
+ path.append('/proc/fs/nfsd/clients/' + i + '/states')
+ return (path)
+ else:
+ exit('Nothing to process')
+
+# A single function to rule them all, in this function we gather all the data
+# from already populated data_list and client_info.
+def printer(data_list, argument):
+ client_info_path = data_list.pop()
+ client_info = file_to_dict(client_info_path)
+ for i in data_list:
+ for key in i:
+ inode = i[key]['superblock'].split(':')[-1]
+ # get the ip address from client_info as 'address:' note the extra
+ # ':' as a suffix to address. If there is a better way to convert
+ # the file to dictionary, please change the following value too.
+ client_ip = client_info['address:']
+ # The ip address is quoted, so we dequote it.
+ client_ip = client_ip[1:-1]
+ try:
+ # if the nfs-server reboots while the nfs-client holds the files open,
+ # the nfs-server would print the filename as '/'. For such instaces we
+ # print the output as disconnected dentry instead of '/'.
+ if(i[key]['filename']=='/'):
+ fname = 'disconnected dentry'
+ else:
+ fname = i[key]['filename'].split('/')[-1]
+ except KeyError:
+ # for older kernels which do not have the fname patch in kernel, they
+ # won't be able to see the fname field. Therefore post it as N/A.
+ fname = "N/A"
+ otype = i[key]['type']
+ try:
+ access = i[key]['access']
+ except:
+ access = ''
+ try:
+ deny = i[key]['deny']
+ except:
+ deny = ''
+ hostname = client_info['name'].split()[-1].split('"')[0]
+ hostname = hostname.split('.')[0]
+ otype = i[key]['type']
+ # if the hostname is too long, it messes up with the output being in columns,
+ # therefore we truncate the hostname followed by two '..' as suffix.
+ if len(hostname) > 20:
+ hostname = hostname[0:20] + '..'
+ clientid = client_info['clientid'].strip()
+ minorversion = client_info['minor version'].rstrip().rsplit()[0]
+ # since some fields do not have deny column, we drop those if -t is either
+ # layout or lock.
+ drop = ['layout', 'lock']
+
+ # Printing the output this way instead of a single string which is concatenated
+ # this makes it better to quickly add more columns in future.
+ if(otype == argument.type or argument.type == 'all'):
+ print('%-13s' %inode, end='| ')
+ print('%-7s' %otype, end='| ')
+ if (argument.type not in drop):
+ print('%-7s' %access, end='| ')
+ if (argument.type not in drop and argument.type !='deleg'):
+ print('%-5s' %deny, end='| ')
+ if (argument.hostname == True):
+ print('%-22s' %hostname, end='| ')
+ else:
+ print('%-22s' %client_ip, end='| ')
+ if (argument.clientinfo == True) :
+ print('%-20s' %clientid, end='| ')
+ print('4.%-3s' %minorversion, end='| ')
+ print(fname)
+
+def opener(path):
+ try:
+ with open(path, 'r') as nfsdata:
+ data = yaml.load(nfsdata, Loader = yaml.BaseLoader)
+ if data is not None:
+ clientinfo = path.rsplit('/', 1)[0] + '/info'
+ data.append(clientinfo)
+ return data
+
+ except OSError as reason:
+ print('%s' % reason)
+
+def print_cols(argument):
+ title_inode = 'Inode number'
+ title_otype = 'Type'
+ title_access = 'Access'
+ title_deny = 'Deny'
+ title_fname = 'Filename'
+ title_clientID = 'Client ID'
+ title_hostname = 'Hostname'
+ title_ip = 'ip address'
+ title_nfsvers = 'vers'
+
+ drop = ['lock', 'layout']
+ print(BBOLD, end='')
+ print('%-13s' %title_inode, end='| ')
+ print('%-7s' %title_otype, end='| ')
+ if (argument.type not in drop):
+ print('%-7s' %title_access, end='| ')
+ if (argument.type not in drop and argument.type !='deleg'):
+ print('%-5s' %title_deny, end='| ')
+ if (argument.hostname == True):
+ print('%-22s' %title_hostname, end='| ')
+ else:
+ print('%-22s' %title_ip, end='| ')
+ if (argument.clientinfo == True):
+ print('%-20s' %title_clientID, end='| ')
+ print('%-5s' %title_nfsvers, end='| ')
+ print(title_fname, end='')
+ print(ENDC)
+
+def nfsd4_show():
+
+ parser = argparse.ArgumentParser(description = 'Parse the nfsd states and clientinfo files.')
+ parser.add_argument('-t', '--type', metavar = 'type', type = str, choices = ['open',
+ 'deleg', 'lock', 'layout', 'all'],
+ default = 'all',
+ help = 'Input the type that you want to be printed: open, lock, deleg, layout, all')
+ parser.add_argument('--clientinfo', action = 'store_true',
+ help = 'output clients information, --hostname is implied.')
+ parser.add_argument('--hostname', action = 'store_true',
+ help = 'print hostname of client instead of its ip address. Longer hostnames are truncated.')
+ parser.add_argument('-q', '--quiet', action = 'store_true',
+ help = 'don\'t print the header information')
+
+ args = parser.parse_args()
+ paths = getpaths()
+ p = mp.Pool(mp.cpu_count(), init_worker)
+ try:
+ result = p.map(opener, paths)
+ p.close()
+ p.join()
+ if len(result) !=0 and not args.quiet and result[0] is not None:
+ print_cols(args)
+
+ for i in result:
+ if i is not None:
+ printer(i, args)
+
+ except KeyboardInterrupt:
+ print('Caught KeyboardInterrupt, terminating workers')
+ p.terminate()
+ p.join()
+
+if __name__ == "__main__":
+ nfsd4_show()
--
2.25.4


2020-04-30 14:06:21

by J. Bruce Fields

[permalink] [raw]
Subject: Re: [PATCH] nfs-utils: add new tool nfsd4-show to parse output from proc files

Just one thing that jumped out at me:

On Tue, Apr 28, 2020 at 10:21:42PM +0530, Achilles Gaikwad wrote:
> +# this function converts the info file to a dictionary format, sorta. :)
> +def file_to_dict(path):
> + client_info = {}
> + with open(path) as f:
> + for line in f:
> + try:
> + (key, val) = line.split(':')

A colon could appear in a string and this would give the wrong results.

These files are supposed to be legal json. I think we want to use
python's builtin "json" module rather than try to parse them on our own.

--b.

> + client_info[key] = val
> + # FIXME: There has to be a better way of converting tscrews he info file to a dictionary.
> + except ValueError:
> + try:
> + (key, val) = line.split()
> + client_info[key] = val
> + except:
> + pass
> + return client_info
> +
> +# this functino gets the paths from /proc/fs/nfsd/clients/
> +# returns a list of paths for each client which has nfs-share mounted.
> +def getpaths():
> + path = []
> + try:
> + dirs = os.listdir('/proc/fs/nfsd/clients/')
> + except OSError as reason:
> + exit('%s' % reason)
> + if len(dirs) !=0:
> + for i in dirs:
> + path.append('/proc/fs/nfsd/clients/' + i + '/states')
> + return (path)
> + else:
> + exit('Nothing to process')
> +
> +# A single function to rule them all, in this function we gather all the data
> +# from already populated data_list and client_info.
> +def printer(data_list, argument):
> + client_info_path = data_list.pop()
> + client_info = file_to_dict(client_info_path)
> + for i in data_list:
> + for key in i:
> + inode = i[key]['superblock'].split(':')[-1]
> + # get the ip address from client_info as 'address:' note the extra
> + # ':' as a suffix to address. If there is a better way to convert
> + # the file to dictionary, please change the following value too.
> + client_ip = client_info['address:']
> + # The ip address is quoted, so we dequote it.
> + client_ip = client_ip[1:-1]
> + try:
> + # if the nfs-server reboots while the nfs-client holds the files open,
> + # the nfs-server would print the filename as '/'. For such instaces we
> + # print the output as disconnected dentry instead of '/'.
> + if(i[key]['filename']=='/'):
> + fname = 'disconnected dentry'
> + else:
> + fname = i[key]['filename'].split('/')[-1]
> + except KeyError:
> + # for older kernels which do not have the fname patch in kernel, they
> + # won't be able to see the fname field. Therefore post it as N/A.
> + fname = "N/A"
> + otype = i[key]['type']
> + try:
> + access = i[key]['access']
> + except:
> + access = ''
> + try:
> + deny = i[key]['deny']
> + except:
> + deny = ''
> + hostname = client_info['name'].split()[-1].split('"')[0]
> + hostname = hostname.split('.')[0]
> + otype = i[key]['type']
> + # if the hostname is too long, it messes up with the output being in columns,
> + # therefore we truncate the hostname followed by two '..' as suffix.
> + if len(hostname) > 20:
> + hostname = hostname[0:20] + '..'
> + clientid = client_info['clientid'].strip()
> + minorversion = client_info['minor version'].rstrip().rsplit()[0]
> + # since some fields do not have deny column, we drop those if -t is either
> + # layout or lock.
> + drop = ['layout', 'lock']
> +
> + # Printing the output this way instead of a single string which is concatenated
> + # this makes it better to quickly add more columns in future.
> + if(otype == argument.type or argument.type == 'all'):
> + print('%-13s' %inode, end='| ')
> + print('%-7s' %otype, end='| ')
> + if (argument.type not in drop):
> + print('%-7s' %access, end='| ')
> + if (argument.type not in drop and argument.type !='deleg'):
> + print('%-5s' %deny, end='| ')
> + if (argument.hostname == True):
> + print('%-22s' %hostname, end='| ')
> + else:
> + print('%-22s' %client_ip, end='| ')
> + if (argument.clientinfo == True) :
> + print('%-20s' %clientid, end='| ')
> + print('4.%-3s' %minorversion, end='| ')
> + print(fname)
> +
> +def opener(path):
> + try:
> + with open(path, 'r') as nfsdata:
> + data = yaml.load(nfsdata, Loader = yaml.BaseLoader)
> + if data is not None:
> + clientinfo = path.rsplit('/', 1)[0] + '/info'
> + data.append(clientinfo)
> + return data
> +
> + except OSError as reason:
> + print('%s' % reason)
> +
> +def print_cols(argument):
> + title_inode = 'Inode number'
> + title_otype = 'Type'
> + title_access = 'Access'
> + title_deny = 'Deny'
> + title_fname = 'Filename'
> + title_clientID = 'Client ID'
> + title_hostname = 'Hostname'
> + title_ip = 'ip address'
> + title_nfsvers = 'vers'
> +
> + drop = ['lock', 'layout']
> + print(BBOLD, end='')
> + print('%-13s' %title_inode, end='| ')
> + print('%-7s' %title_otype, end='| ')
> + if (argument.type not in drop):
> + print('%-7s' %title_access, end='| ')
> + if (argument.type not in drop and argument.type !='deleg'):
> + print('%-5s' %title_deny, end='| ')
> + if (argument.hostname == True):
> + print('%-22s' %title_hostname, end='| ')
> + else:
> + print('%-22s' %title_ip, end='| ')
> + if (argument.clientinfo == True):
> + print('%-20s' %title_clientID, end='| ')
> + print('%-5s' %title_nfsvers, end='| ')
> + print(title_fname, end='')
> + print(ENDC)
> +
> +def nfsd4_show():
> +
> + parser = argparse.ArgumentParser(description = 'Parse the nfsd states and clientinfo files.')
> + parser.add_argument('-t', '--type', metavar = 'type', type = str, choices = ['open',
> + 'deleg', 'lock', 'layout', 'all'],
> + default = 'all',
> + help = 'Input the type that you want to be printed: open, lock, deleg, layout, all')
> + parser.add_argument('--clientinfo', action = 'store_true',
> + help = 'output clients information, --hostname is implied.')
> + parser.add_argument('--hostname', action = 'store_true',
> + help = 'print hostname of client instead of its ip address. Longer hostnames are truncated.')
> + parser.add_argument('-q', '--quiet', action = 'store_true',
> + help = 'don\'t print the header information')
> +
> + args = parser.parse_args()
> + paths = getpaths()
> + p = mp.Pool(mp.cpu_count(), init_worker)
> + try:
> + result = p.map(opener, paths)
> + p.close()
> + p.join()
> + if len(result) !=0 and not args.quiet and result[0] is not None:
> + print_cols(args)
> +
> + for i in result:
> + if i is not None:
> + printer(i, args)
> +
> + except KeyboardInterrupt:
> + print('Caught KeyboardInterrupt, terminating workers')
> + p.terminate()
> + p.join()
> +
> +if __name__ == "__main__":
> + nfsd4_show()
> --
> 2.25.4

2020-04-30 14:49:45

by Achilles Gaikwad

[permalink] [raw]
Subject: Re: [PATCH] nfs-utils: add new tool nfsd4-show to parse output from proc files

Good catch.
Thank you for the review! We'll send a v2 for this.

Best,
- Achilles
---

On Thu, Apr 30, 2020 at 7:35 PM J. Bruce Fields <[email protected]> wrote:
>
> Just one thing that jumped out at me:
>
> On Tue, Apr 28, 2020 at 10:21:42PM +0530, Achilles Gaikwad wrote:
> > +# this function converts the info file to a dictionary format, sorta. :)
> > +def file_to_dict(path):
> > + client_info = {}
> > + with open(path) as f:
> > + for line in f:
> > + try:
> > + (key, val) = line.split(':')
>
> A colon could appear in a string and this would give the wrong results.
>
> These files are supposed to be legal json. I think we want to use
> python's builtin "json" module rather than try to parse them on our own.
>
> --b.
>
> > + client_info[key] = val
> > + # FIXME: There has to be a better way of converting tscrews he info file to a dictionary.
> > + except ValueError:
> > + try:
> > + (key, val) = line.split()
> > + client_info[key] = val
> > + except:
> > + pass
> > + return client_info
> > +
> > +# this functino gets the paths from /proc/fs/nfsd/clients/
> > +# returns a list of paths for each client which has nfs-share mounted.
> > +def getpaths():
> > + path = []
> > + try:
> > + dirs = os.listdir('/proc/fs/nfsd/clients/')
> > + except OSError as reason:
> > + exit('%s' % reason)
> > + if len(dirs) !=0:
> > + for i in dirs:
> > + path.append('/proc/fs/nfsd/clients/' + i + '/states')
> > + return (path)
> > + else:
> > + exit('Nothing to process')
> > +
> > +# A single function to rule them all, in this function we gather all the data
> > +# from already populated data_list and client_info.
> > +def printer(data_list, argument):
> > + client_info_path = data_list.pop()
> > + client_info = file_to_dict(client_info_path)
> > + for i in data_list:
> > + for key in i:
> > + inode = i[key]['superblock'].split(':')[-1]
> > + # get the ip address from client_info as 'address:' note the extra
> > + # ':' as a suffix to address. If there is a better way to convert
> > + # the file to dictionary, please change the following value too.
> > + client_ip = client_info['address:']
> > + # The ip address is quoted, so we dequote it.
> > + client_ip = client_ip[1:-1]
> > + try:
> > + # if the nfs-server reboots while the nfs-client holds the files open,
> > + # the nfs-server would print the filename as '/'. For such instaces we
> > + # print the output as disconnected dentry instead of '/'.
> > + if(i[key]['filename']=='/'):
> > + fname = 'disconnected dentry'
> > + else:
> > + fname = i[key]['filename'].split('/')[-1]
> > + except KeyError:
> > + # for older kernels which do not have the fname patch in kernel, they
> > + # won't be able to see the fname field. Therefore post it as N/A.
> > + fname = "N/A"
> > + otype = i[key]['type']
> > + try:
> > + access = i[key]['access']
> > + except:
> > + access = ''
> > + try:
> > + deny = i[key]['deny']
> > + except:
> > + deny = ''
> > + hostname = client_info['name'].split()[-1].split('"')[0]
> > + hostname = hostname.split('.')[0]
> > + otype = i[key]['type']
> > + # if the hostname is too long, it messes up with the output being in columns,
> > + # therefore we truncate the hostname followed by two '..' as suffix.
> > + if len(hostname) > 20:
> > + hostname = hostname[0:20] + '..'
> > + clientid = client_info['clientid'].strip()
> > + minorversion = client_info['minor version'].rstrip().rsplit()[0]
> > + # since some fields do not have deny column, we drop those if -t is either
> > + # layout or lock.
> > + drop = ['layout', 'lock']
> > +
> > + # Printing the output this way instead of a single string which is concatenated
> > + # this makes it better to quickly add more columns in future.
> > + if(otype == argument.type or argument.type == 'all'):
> > + print('%-13s' %inode, end='| ')
> > + print('%-7s' %otype, end='| ')
> > + if (argument.type not in drop):
> > + print('%-7s' %access, end='| ')
> > + if (argument.type not in drop and argument.type !='deleg'):
> > + print('%-5s' %deny, end='| ')
> > + if (argument.hostname == True):
> > + print('%-22s' %hostname, end='| ')
> > + else:
> > + print('%-22s' %client_ip, end='| ')
> > + if (argument.clientinfo == True) :
> > + print('%-20s' %clientid, end='| ')
> > + print('4.%-3s' %minorversion, end='| ')
> > + print(fname)
> > +
> > +def opener(path):
> > + try:
> > + with open(path, 'r') as nfsdata:
> > + data = yaml.load(nfsdata, Loader = yaml.BaseLoader)
> > + if data is not None:
> > + clientinfo = path.rsplit('/', 1)[0] + '/info'
> > + data.append(clientinfo)
> > + return data
> > +
> > + except OSError as reason:
> > + print('%s' % reason)
> > +
> > +def print_cols(argument):
> > + title_inode = 'Inode number'
> > + title_otype = 'Type'
> > + title_access = 'Access'
> > + title_deny = 'Deny'
> > + title_fname = 'Filename'
> > + title_clientID = 'Client ID'
> > + title_hostname = 'Hostname'
> > + title_ip = 'ip address'
> > + title_nfsvers = 'vers'
> > +
> > + drop = ['lock', 'layout']
> > + print(BBOLD, end='')
> > + print('%-13s' %title_inode, end='| ')
> > + print('%-7s' %title_otype, end='| ')
> > + if (argument.type not in drop):
> > + print('%-7s' %title_access, end='| ')
> > + if (argument.type not in drop and argument.type !='deleg'):
> > + print('%-5s' %title_deny, end='| ')
> > + if (argument.hostname == True):
> > + print('%-22s' %title_hostname, end='| ')
> > + else:
> > + print('%-22s' %title_ip, end='| ')
> > + if (argument.clientinfo == True):
> > + print('%-20s' %title_clientID, end='| ')
> > + print('%-5s' %title_nfsvers, end='| ')
> > + print(title_fname, end='')
> > + print(ENDC)
> > +
> > +def nfsd4_show():
> > +
> > + parser = argparse.ArgumentParser(description = 'Parse the nfsd states and clientinfo files.')
> > + parser.add_argument('-t', '--type', metavar = 'type', type = str, choices = ['open',
> > + 'deleg', 'lock', 'layout', 'all'],
> > + default = 'all',
> > + help = 'Input the type that you want to be printed: open, lock, deleg, layout, all')
> > + parser.add_argument('--clientinfo', action = 'store_true',
> > + help = 'output clients information, --hostname is implied.')
> > + parser.add_argument('--hostname', action = 'store_true',
> > + help = 'print hostname of client instead of its ip address. Longer hostnames are truncated.')
> > + parser.add_argument('-q', '--quiet', action = 'store_true',
> > + help = 'don\'t print the header information')
> > +
> > + args = parser.parse_args()
> > + paths = getpaths()
> > + p = mp.Pool(mp.cpu_count(), init_worker)
> > + try:
> > + result = p.map(opener, paths)
> > + p.close()
> > + p.join()
> > + if len(result) !=0 and not args.quiet and result[0] is not None:
> > + print_cols(args)
> > +
> > + for i in result:
> > + if i is not None:
> > + printer(i, args)
> > +
> > + except KeyboardInterrupt:
> > + print('Caught KeyboardInterrupt, terminating workers')
> > + p.terminate()
> > + p.join()
> > +
> > +if __name__ == "__main__":
> > + nfsd4_show()
> > --
> > 2.25.4
>