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usr/sbin/nfsdclnts 0000755 00000022021 14720426620 0010234 0 ustar 00 #!/usr/libexec/platform-python # -*- 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 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()
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