diff options
Diffstat (limited to 'tools/nfsdclnts')
| -rw-r--r-- | tools/nfsdclnts/Makefile.am | 13 | ||||
| -rw-r--r-- | tools/nfsdclnts/Makefile.in | 621 | ||||
| -rw-r--r-- | tools/nfsdclnts/nfsdclnts.man | 180 | ||||
| -rwxr-xr-x | tools/nfsdclnts/nfsdclnts.py | 255 |
4 files changed, 1069 insertions, 0 deletions
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+# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/tools/nfsdclnts/nfsdclnts.man b/tools/nfsdclnts/nfsdclnts.man new file mode 100644 index 0000000..c7efbd7 --- /dev/null +++ b/tools/nfsdclnts/nfsdclnts.man @@ -0,0 +1,180 @@ +.\" +.\" nfsdclnts(8) +.\" +.TH "NFSDCLTS" "8" "2020-05-09" "nfsdclnts" "nfsdclnts" +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.ss \n[.ss] 0 +.nh +.ad l +.de URL +\fI\\$2\fP <\\$1>\\$3 +.. +.als MTO URL +.if \n[.g] \{\ +. mso www.tmac +. am URL +. ad l +. . +. am MTO +. ad l +. . +. LINKSTYLE blue R < > +.\} +.SH "NAME" +nfsdclnts \- print various nfs client information for knfsd server. +.SH "SYNOPSIS" +.sp +\fBnfsdclnts\fP [\fI\-h\fP] [\fI\-t type\fP] [\fI\-\-clientinfo\fP] [\fI\-\-hostname\fP] [\fI\-q\fP] +.SH "DESCRIPTION" +.sp +The nfsdclnts(8) command parses the content present in /proc/fs/nfsd/clients/ directories. nfsdclnts(8) displays files which are open, locked, delegated by the nfs\-client. It also prints useful client information such as hostname, clientID, NFS version mounted by the nfs\-client. +.SH "OPTIONS" +.sp +\fB\-t, \-\-type\fP=TYPE +.RS 4 +Specify the type of file to be displayed. Takes only one TYPE at a time. +.sp +\fIopen\fP, \fIlock\fP, \fIdeleg\fP, \fIlayout\fP, or \fIall\fP +.sp +open: displays the open files by nfs\-client(s). +.sp +lock: displays the files locked by nfs\-client(s). +.sp +layout: displays the files for which layout is given. +.sp +deleg: displays delegated files information and delegation type. +.sp +all: prints all the above type. +.RE +.sp +\fB\-\-clientinfo\fP +.RS 4 +displays various nfs\-client info fields such as version of nfs mounted at nfs\-client and clientID. +.RE +.sp +\fB\-\-hostname\fP +.RS 4 +Print hostname of nfs\-client instead of ip-address. +.RE +.sp +\fB\-q, \-\-quiet\fP +.RS 4 +Hide the header information. +.RE +.sp +\fB\-v, \-\-verbose\fP +.RS 4 +Verbose operation, show debug messages. +.RE +.sp +\fB\-f, \-\-file\fP +.RS 4 +Instead of processing all client directories under /proc/fs/nfsd/clients, one can provide a specific +states file to process. One should make sure that info file resides in the same directory as states file. +If the info file is not valid or present the fields would be marked as "N/A". +.RE +.sp +\fB\-h, \-\-help\fP +.RS 4 +Print help explaining the command line options. +.SH "EXAMPLES" +.sp +\fBnfsdclnts \-\-type open\fP +.RS 4 +List all files with open type only. +.RE +.sp +.if n .RS 4 +.nf +Inode number | Type | Access | Deny | ip address | Filename +33823232 | open | r\- | \-\- | [::1]:757 | testfile +.fi +.if n .RE +.sp +\fBnfsdclnts \-\-type deleg\fP +.RS 4 +List all files with deleg type only. +.RE +.sp +.if n .RS 4 +.nf +Inode number | Type | Access | ip address | Filename +33823232 | deleg | r | [::1]:757 | testfile +.fi +.if n .RE +.sp +\fBnfsdclnts \-\-hostname\fP +.RS 4 +Print hostname instead of ip\-address. +.RE +.sp +.if n .RS 4 +.nf +Inode number | Type | Access | Deny | Hostname | Filename +33823232 | open | r\- | \-\- | nfs\-server | testfile +33823232 | deleg | r | | nfs\-server | testfile +.fi +.if n .RE +.sp +\fBnfsdclnts \-\-clientinfo\fP +.RS 4 +Print client information. +.RE +.sp +.if n .RS 4 +.nf +Inode number | Type | Access | Deny | ip address | Client ID | vers | Filename +33823232 | open | r\- | \-\- | [::1]:757 | 0xc79a009f5eb65e84 | 4.2 | testfile +33823232 | deleg | r | | [::1]:757 | 0xc79a009f5eb65e84 | 4.2 | testfile +.fi +.if n .RE +.sp +\fBnfsdclnts \-\-file /proc/fs/nfsd/clients/3/states -t open\fP +.RS 4 +Process specific states file. +.RE +.sp +.if n .RS 4 +.nf +Inode number | Type | Access | Deny | ip address | Client ID | vers | Filename +33823232 | open | r\- | \-\- | [::1]:757 | 0xc79a009f5eb65e84 | 4.2 | testfile +.fi +.if n .RE +.sp +\fBnfsdclnts \-\-quiet \-\-hostname\fP +.RS 4 +Hide the header information. +.RE +.sp +.if n .RS 4 +.nf +33823232 | open | r\- | \-\- | nfs\-server | testfile +33823232 | deleg | r | | nfs\-server | testfile +.fi +.if n .RE +.SH "FILES" +.sp +\fB/proc/fs/nfsd/clients/\fP +.sp +Displays basic information about each NFSv4 client. +.sp +\fB/proc/fs/nfsd/clients/#/info\fP +.sp +Displays information about all the opens held by the given client, including open modes, device numbers, inode numbers, and open owners. +.sp +\fB/proc/fs/nfsd/clients/#/states\fP +.SH "NOTES" +.sp +/proc/fs/nfsd/clients/ support was initially introduced in 5.3 kernel and is only implemented for mount points using NFSv4. +.SH "BUGS" +Please report any BUGs to \c +.MTO "linux\-nfs\(atvger.kernel.org" "" "" +.SH SEE ALSO +.BR nfsd (8), +.BR exportfs (8), +.BR idmapd (8), +.BR statd (8) +.SH "AUTHORS" +Achilles Gaikwad <agaikwad@redhat.com> and +Kenneth D'souza <kdsouza@redhat.com> diff --git a/tools/nfsdclnts/nfsdclnts.py b/tools/nfsdclnts/nfsdclnts.py new file mode 100755 index 0000000..b7280f2 --- /dev/null +++ b/tools/nfsdclnts/nfsdclnts.py @@ -0,0 +1,255 @@ +#!/usr/bin/python3 +# -*- python-mode -*- +''' + Copyright (C) 2020 + Authors: Achilles Gaikwad <agaikwad@redhat.com> + Kenneth D'souza <kdsouza@redhat.com> + + 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 = {} + try: + with open(path) as f: + for line in f: + try: + (key, val) = line.split(':', 1) + client_info[key] = val.strip() + # FIXME: There has to be a better way of converting the info file to a dictionary. + except ValueError as reason: + if verbose: + print('Exception occured, %s' % reason) + + if len(client_info) == 0 and verbose: + print("Provided %s file is not valid" %path) + return client_info + + except OSError as reason: + if verbose: + print('%s' % reason) + +# this function 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] + # The ip address is quoted, so we dequote it. + try: + client_ip = client_info['address'][1:-1] + except: + client_ip = "N/A" + 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 = '' + try: + hostname = client_info['name'].split()[-1].split('"')[0] + hostname = hostname.split('.')[0] + # 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] + '..' + except: + hostname = "N/A" + try: + clientid = client_info['clientid'] + except: + clientid = "N/A" + try: + minorversion = "4." + client_info['minor version'] + except: + minorversion = "N/A" + + otype = i[key]['type'] + # 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('%-5s' %minorversion, end='| ') + print(fname) + +def opener(path): + try: + with open(path, 'r') as nfsdata: + try: + data = yaml.load(nfsdata, Loader = yaml.BaseLoader) + if data is not None: + clientinfo = path.rsplit('/', 1)[0] + '/info' + data.append(clientinfo) + return data + except: + if verbose: + print("Exception occurred, Please make sure %s is a YAML file" %path) + + except OSError as reason: + if verbose: + 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('-v', '--verbose', action = 'store_true', + help = 'Verbose operation, show debug messages.') + parser.add_argument('-f', '--file', nargs='+', type = str, metavar='', + help = 'pass client states file, provided that info file resides in the same directory.') + parser.add_argument('-q', '--quiet', action = 'store_true', + help = 'don\'t print the header information') + + args = parser.parse_args() + + global verbose + verbose = False + signal.signal(signal.SIGPIPE, signal.SIG_DFL) + if args.verbose: + verbose = True + + if args.file: + paths = args.file + else: + paths = getpaths() + + p = mp.Pool(mp.cpu_count(), init_worker) + try: + result = p.map(opener, paths) + ### Drop None entries from list + final_result = list(filter(None, result)) + p.close() + p.join() + + if len(final_result) !=0 and not args.quiet: + print_cols(args) + + for item in final_result: + printer(item, args) + + except KeyboardInterrupt: + print('Caught KeyboardInterrupt, terminating workers') + p.terminate() + p.join() + +if __name__ == "__main__": + nfsd4_show() |