109c434b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Syscall interface to knfsd. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 61da177e4SLinus Torvalds */ 71da177e4SLinus Torvalds 85a0e3ad6STejun Heo #include <linux/slab.h> 93f8206d4SAl Viro #include <linux/namei.h> 10b41b66d6SNeilBrown #include <linux/ctype.h> 1196a374a3SDavid Howells #include <linux/fs_context.h> 121da177e4SLinus Torvalds 1380212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 144373ea84SWendy Cheng #include <linux/lockd/lockd.h> 155976687aSJeff Layton #include <linux/sunrpc/addr.h> 16b0b0c0a2SKevin Coffman #include <linux/sunrpc/gss_api.h> 17813fd320SJeff Layton #include <linux/sunrpc/rpc_pipe_fs.h> 18143cb494SPaul Gortmaker #include <linux/module.h> 19e8a79fb1SJ. Bruce Fields #include <linux/fsnotify.h> 201da177e4SLinus Torvalds 212ca72e17SJ. Bruce Fields #include "idmap.h" 229a74af21SBoaz Harrosh #include "nfsd.h" 239a74af21SBoaz Harrosh #include "cache.h" 24f3c7521fSBryan Schumaker #include "state.h" 257ea34ac1SJeff Layton #include "netns.h" 269cf514ccSChristoph Hellwig #include "pnfs.h" 272e6c6e4cSChuck Lever #include "filecache.h" 2839d432fcSChuck Lever #include "trace.h" 299a74af21SBoaz Harrosh 301da177e4SLinus Torvalds /* 31b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 321da177e4SLinus Torvalds */ 331da177e4SLinus Torvalds enum { 341da177e4SLinus Torvalds NFSD_Root = 1, 351da177e4SLinus Torvalds NFSD_List, 3620ad856eSAmir Goldstein NFSD_Export_Stats, 37e8e8753fSJ. Bruce Fields NFSD_Export_features, 381da177e4SLinus Torvalds NFSD_Fh, 394373ea84SWendy Cheng NFSD_FO_UnlockIP, 4017efa372SWendy Cheng NFSD_FO_UnlockFS, 411da177e4SLinus Torvalds NFSD_Threads, 42eed2965aSGreg Banks NFSD_Pool_Threads, 4303cf6c9fSGreg Banks NFSD_Pool_Stats, 44a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 4570c3b76cSNeilBrown NFSD_Versions, 4680212d59SNeilBrown NFSD_Ports, 47596bbe53SNeilBrown NFSD_MaxBlkSize, 485b8db00bSJeff Layton NFSD_MaxConnections, 492e6c6e4cSChuck Lever NFSD_Filecache, 5070c3b76cSNeilBrown /* 5170c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 5270c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 5370c3b76cSNeilBrown */ 5470c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 551da177e4SLinus Torvalds NFSD_Leasetime, 56efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 570964a3d3SNeilBrown NFSD_RecoveryDir, 587f5ef2e9SJeff Layton NFSD_V4EndGrace, 5970c3b76cSNeilBrown #endif 60e8a79fb1SJ. Bruce Fields NFSD_MaxReserved 611da177e4SLinus Torvalds }; 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds /* 641da177e4SLinus Torvalds * write() for these nodes. 651da177e4SLinus Torvalds */ 661da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 67b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 68b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 691da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 70eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 7170c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 7280212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 73596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 745b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 7570c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 761da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 77efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 780964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 797f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 8070c3b76cSNeilBrown #endif 811da177e4SLinus Torvalds 82c2cdc2abSEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 831da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 84b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 85b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 861da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 87eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 8870c3b76cSNeilBrown [NFSD_Versions] = write_versions, 8980212d59SNeilBrown [NFSD_Ports] = write_ports, 90596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 915b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 9270c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 931da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 94efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 950964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 967f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 9770c3b76cSNeilBrown #endif 981da177e4SLinus Torvalds }; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1011da177e4SLinus Torvalds { 102496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 1031da177e4SLinus Torvalds char *data; 1041da177e4SLinus Torvalds ssize_t rv; 1051da177e4SLinus Torvalds 106e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1071da177e4SLinus Torvalds return -EINVAL; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1101da177e4SLinus Torvalds if (IS_ERR(data)) 1111da177e4SLinus Torvalds return PTR_ERR(data); 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1143434d7aaSChuck Lever if (rv < 0) 1151da177e4SLinus Torvalds return rv; 1163434d7aaSChuck Lever 1173434d7aaSChuck Lever simple_transaction_set(file, rv); 1183434d7aaSChuck Lever return size; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1217390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1227390022dSNeilBrown { 1237390022dSNeilBrown if (! file->private_data) { 1247390022dSNeilBrown /* An attempt to read a transaction file without writing 1257390022dSNeilBrown * causes a 0-byte write so that the file can return 1267390022dSNeilBrown * state information 1277390022dSNeilBrown */ 1287390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1297390022dSNeilBrown if (rv < 0) 1307390022dSNeilBrown return rv; 1317390022dSNeilBrown } 1327390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1337390022dSNeilBrown } 1347390022dSNeilBrown 1354b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1361da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1377390022dSNeilBrown .read = nfsctl_transaction_read, 1381da177e4SLinus Torvalds .release = simple_transaction_release, 1396038f373SArnd Bergmann .llseek = default_llseek, 1401da177e4SLinus Torvalds }; 1411da177e4SLinus Torvalds 14296d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1431da177e4SLinus Torvalds { 144f2c7ea10SStanislav Kinsbursky int err; 145f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 14696d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 147f2c7ea10SStanislav Kinsbursky 148f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 149f2c7ea10SStanislav Kinsbursky if (err) 150f2c7ea10SStanislav Kinsbursky return err; 151f2c7ea10SStanislav Kinsbursky 152f2c7ea10SStanislav Kinsbursky seq = file->private_data; 153e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 154f2c7ea10SStanislav Kinsbursky return 0; 1551da177e4SLinus Torvalds } 1561da177e4SLinus Torvalds 15796d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 15896d851c4SStanislav Kinsbursky { 15996d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 16096d851c4SStanislav Kinsbursky } 16196d851c4SStanislav Kinsbursky 16296d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 16396d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1641da177e4SLinus Torvalds .read = seq_read, 1651da177e4SLinus Torvalds .llseek = seq_lseek, 1661da177e4SLinus Torvalds .release = seq_release, 1671da177e4SLinus Torvalds }; 1681da177e4SLinus Torvalds 169e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 170e8e8753fSJ. Bruce Fields { 171e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 172e8e8753fSJ. Bruce Fields return 0; 173e8e8753fSJ. Bruce Fields } 174e8e8753fSJ. Bruce Fields 1759beeaab8SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(export_features); 176e8e8753fSJ. Bruce Fields 177828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 17803cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 17903cf6c9fSGreg Banks .read = seq_read, 18003cf6c9fSGreg Banks .llseek = seq_lseek, 181ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 18203cf6c9fSGreg Banks }; 18303cf6c9fSGreg Banks 18464776611SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); 185a2f999a3SJeff Layton 1861342f9ddSChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats); 1872e6c6e4cSChuck Lever 1881da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 1891da177e4SLinus Torvalds /* 1901da177e4SLinus Torvalds * payload - write methods 1911da177e4SLinus Torvalds */ 1921da177e4SLinus Torvalds 193244c7d44SAl Viro static inline struct net *netns(struct file *file) 194244c7d44SAl Viro { 195244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 196244c7d44SAl Viro } 1971da177e4SLinus Torvalds 198f2453978SChuck Lever /* 199262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 200262a0982SChuck Lever * 201262a0982SChuck Lever * Experimental. 202262a0982SChuck Lever * 203262a0982SChuck Lever * Input: 204262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2054116092bSChuck Lever * presentation format IP address 206262a0982SChuck Lever * size: length of C string in @buf 207262a0982SChuck Lever * Output: 208262a0982SChuck Lever * On success: returns zero if all specified locks were released; 209262a0982SChuck Lever * returns one if one or more locks were not released 210262a0982SChuck Lever * On error: return code is negative errno value 211262a0982SChuck Lever */ 212b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2134373ea84SWendy Cheng { 2144116092bSChuck Lever struct sockaddr_storage address; 2154116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2164116092bSChuck Lever size_t salen = sizeof(address); 217367c8c7bSChuck Lever char *fo_path; 218244c7d44SAl Viro struct net *net = netns(file); 2194373ea84SWendy Cheng 2204373ea84SWendy Cheng /* sanity check */ 2214373ea84SWendy Cheng if (size == 0) 2224373ea84SWendy Cheng return -EINVAL; 2234373ea84SWendy Cheng 2244373ea84SWendy Cheng if (buf[size-1] != '\n') 2254373ea84SWendy Cheng return -EINVAL; 2264373ea84SWendy Cheng 2274373ea84SWendy Cheng fo_path = buf; 2284373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2294373ea84SWendy Cheng return -EINVAL; 2304373ea84SWendy Cheng 23111f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2324373ea84SWendy Cheng return -EINVAL; 2334373ea84SWendy Cheng 23439d432fcSChuck Lever trace_nfsd_ctl_unlock_ip(net, buf); 2354116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2364373ea84SWendy Cheng } 2374373ea84SWendy Cheng 238f2453978SChuck Lever /* 239262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 240262a0982SChuck Lever * 241262a0982SChuck Lever * Experimental. 242262a0982SChuck Lever * 243262a0982SChuck Lever * Input: 244262a0982SChuck Lever * buf: '\n'-terminated C string containing the 245262a0982SChuck Lever * absolute pathname of a local file system 246262a0982SChuck Lever * size: length of C string in @buf 247262a0982SChuck Lever * Output: 248262a0982SChuck Lever * On success: returns zero if all specified locks were released; 249262a0982SChuck Lever * returns one if one or more locks were not released 250262a0982SChuck Lever * On error: return code is negative errno value 251262a0982SChuck Lever */ 252b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 25317efa372SWendy Cheng { 254a63bb996SAl Viro struct path path; 25517efa372SWendy Cheng char *fo_path; 25617efa372SWendy Cheng int error; 25717efa372SWendy Cheng 25817efa372SWendy Cheng /* sanity check */ 25917efa372SWendy Cheng if (size == 0) 26017efa372SWendy Cheng return -EINVAL; 26117efa372SWendy Cheng 26217efa372SWendy Cheng if (buf[size-1] != '\n') 26317efa372SWendy Cheng return -EINVAL; 26417efa372SWendy Cheng 26517efa372SWendy Cheng fo_path = buf; 26617efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 26717efa372SWendy Cheng return -EINVAL; 26839d432fcSChuck Lever trace_nfsd_ctl_unlock_fs(netns(file), fo_path); 269a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 27017efa372SWendy Cheng if (error) 27117efa372SWendy Cheng return error; 27217efa372SWendy Cheng 273262a0982SChuck Lever /* 274262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 275262a0982SChuck Lever * releasing locks on the wrong file system. 276262a0982SChuck Lever * 277262a0982SChuck Lever * For example: 278262a0982SChuck Lever * 1. Does the path refer to a directory? 279262a0982SChuck Lever * 2. Is that directory a mount point, or 280262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 281262a0982SChuck Lever */ 282d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 28317efa372SWendy Cheng 284a63bb996SAl Viro path_put(&path); 28517efa372SWendy Cheng return error; 28617efa372SWendy Cheng } 28717efa372SWendy Cheng 288f2453978SChuck Lever /* 289262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 290262a0982SChuck Lever * 291262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 292262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 293262a0982SChuck Lever * contain escape sequences. 294262a0982SChuck Lever * 295262a0982SChuck Lever * Input: 296262a0982SChuck Lever * buf: 297262a0982SChuck Lever * domain: client domain name 298262a0982SChuck Lever * path: export pathname 299262a0982SChuck Lever * maxsize: numeric maximum size of 300262a0982SChuck Lever * @buf 301262a0982SChuck Lever * size: length of C string in @buf 302262a0982SChuck Lever * Output: 303262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 304262a0982SChuck Lever * string containing a ASCII hex text version 305262a0982SChuck Lever * of the NFS file handle; 306262a0982SChuck Lever * return code is the size in bytes of the string 307262a0982SChuck Lever * On error: return code is negative errno value 308262a0982SChuck Lever */ 3091da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3101da177e4SLinus Torvalds { 3111da177e4SLinus Torvalds char *dname, *path; 3123f649ab7SKees Cook int maxsize; 3131da177e4SLinus Torvalds char *mesg = buf; 3141da177e4SLinus Torvalds int len; 3151da177e4SLinus Torvalds struct auth_domain *dom; 3161da177e4SLinus Torvalds struct knfsd_fh fh; 3171da177e4SLinus Torvalds 31887d26ea7SJ. Bruce Fields if (size == 0) 31987d26ea7SJ. Bruce Fields return -EINVAL; 32087d26ea7SJ. Bruce Fields 3211da177e4SLinus Torvalds if (buf[size-1] != '\n') 3221da177e4SLinus Torvalds return -EINVAL; 3231da177e4SLinus Torvalds buf[size-1] = 0; 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds dname = mesg; 3261da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 32754224f04SChuck Lever if (len <= 0) 32854224f04SChuck Lever return -EINVAL; 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds path = dname+len+1; 3311da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 33254224f04SChuck Lever if (len <= 0) 33354224f04SChuck Lever return -EINVAL; 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3361da177e4SLinus Torvalds if (len) 3371da177e4SLinus Torvalds return len; 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3401da177e4SLinus Torvalds return -EINVAL; 3413c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size) > 0) 3441da177e4SLinus Torvalds return -EINVAL; 3451da177e4SLinus Torvalds 34639d432fcSChuck Lever trace_nfsd_ctl_filehandle(netns(file), dname, path, maxsize); 34739d432fcSChuck Lever 3481da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3491da177e4SLinus Torvalds dom = unix_domain_find(dname); 3501da177e4SLinus Torvalds if (!dom) 3511da177e4SLinus Torvalds return -ENOMEM; 3521da177e4SLinus Torvalds 353244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3541da177e4SLinus Torvalds auth_domain_put(dom); 3551da177e4SLinus Torvalds if (len) 3561da177e4SLinus Torvalds return len; 3571da177e4SLinus Torvalds 35854224f04SChuck Lever mesg = buf; 35954224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 360d8b26071SNeilBrown qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size); 3611da177e4SLinus Torvalds mesg[-1] = '\n'; 3621da177e4SLinus Torvalds return mesg - buf; 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 365f2453978SChuck Lever /* 366262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 367262a0982SChuck Lever * 368262a0982SChuck Lever * Input: 369262a0982SChuck Lever * buf: ignored 370262a0982SChuck Lever * size: zero 371262a0982SChuck Lever * Output: 372262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 373262a0982SChuck Lever * string numeric value representing the number of 374262a0982SChuck Lever * running NFSD threads; 375262a0982SChuck Lever * return code is the size in bytes of the string 376262a0982SChuck Lever * On error: return code is zero 377262a0982SChuck Lever * 378262a0982SChuck Lever * OR 379262a0982SChuck Lever * 380262a0982SChuck Lever * Input: 381262a0982SChuck Lever * buf: C string containing an unsigned 382262a0982SChuck Lever * integer value representing the 383262a0982SChuck Lever * number of NFSD threads to start 384262a0982SChuck Lever * size: non-zero length of C string in @buf 385262a0982SChuck Lever * Output: 386262a0982SChuck Lever * On success: NFS service is started; 387262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 388262a0982SChuck Lever * string numeric value representing the number of 389262a0982SChuck Lever * running NFSD threads; 390262a0982SChuck Lever * return code is the size in bytes of the string 391262a0982SChuck Lever * On error: return code is zero or a negative errno value 392262a0982SChuck Lever */ 3931da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 3941da177e4SLinus Torvalds { 3951da177e4SLinus Torvalds char *mesg = buf; 3961da177e4SLinus Torvalds int rv; 397244c7d44SAl Viro struct net *net = netns(file); 398d41a9417SStanislav Kinsbursky 3991da177e4SLinus Torvalds if (size > 0) { 4001da177e4SLinus Torvalds int newthreads; 4011da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4021da177e4SLinus Torvalds if (rv) 4031da177e4SLinus Torvalds return rv; 4041da177e4SLinus Torvalds if (newthreads < 0) 4051da177e4SLinus Torvalds return -EINVAL; 40639d432fcSChuck Lever trace_nfsd_ctl_threads(net, newthreads); 4074df493a2STrond Myklebust rv = nfsd_svc(newthreads, net, file->f_cred); 40882e12fe9SNeilBrown if (rv < 0) 4091da177e4SLinus Torvalds return rv; 41082e12fe9SNeilBrown } else 4119dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 412e06b6405SChuck Lever 41382e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 416f2453978SChuck Lever /* 417262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 418262a0982SChuck Lever * 419262a0982SChuck Lever * Input: 420262a0982SChuck Lever * buf: ignored 421262a0982SChuck Lever * size: zero 422262a0982SChuck Lever * 423262a0982SChuck Lever * OR 424262a0982SChuck Lever * 425262a0982SChuck Lever * Input: 426262a0982SChuck Lever * buf: C string containing whitespace- 427262a0982SChuck Lever * separated unsigned integer values 428262a0982SChuck Lever * representing the number of NFSD 429262a0982SChuck Lever * threads to start in each pool 430262a0982SChuck Lever * size: non-zero length of C string in @buf 431262a0982SChuck Lever * Output: 432262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 433262a0982SChuck Lever * string containing integer values representing the 434262a0982SChuck Lever * number of NFSD threads in each pool; 435262a0982SChuck Lever * return code is the size in bytes of the string 436262a0982SChuck Lever * On error: return code is zero or a negative errno value 437262a0982SChuck Lever */ 438eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 439eed2965aSGreg Banks { 440eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 441eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 442eed2965aSGreg Banks */ 443eed2965aSGreg Banks char *mesg = buf; 444eed2965aSGreg Banks int i; 445eed2965aSGreg Banks int rv; 446eed2965aSGreg Banks int len; 447bedbdd8bSNeil Brown int npools; 448eed2965aSGreg Banks int *nthreads; 449244c7d44SAl Viro struct net *net = netns(file); 450eed2965aSGreg Banks 451bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4529dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 453eed2965aSGreg Banks if (npools == 0) { 454eed2965aSGreg Banks /* 455eed2965aSGreg Banks * NFS is shut down. The admin can start it by 456eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 457eed2965aSGreg Banks * file, sorry. Report zero threads. 458eed2965aSGreg Banks */ 459bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 460eed2965aSGreg Banks strcpy(buf, "0\n"); 461eed2965aSGreg Banks return strlen(buf); 462eed2965aSGreg Banks } 463eed2965aSGreg Banks 464eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 465bedbdd8bSNeil Brown rv = -ENOMEM; 466eed2965aSGreg Banks if (nthreads == NULL) 467bedbdd8bSNeil Brown goto out_free; 468eed2965aSGreg Banks 469eed2965aSGreg Banks if (size > 0) { 470eed2965aSGreg Banks for (i = 0; i < npools; i++) { 471eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 472eed2965aSGreg Banks if (rv == -ENOENT) 473eed2965aSGreg Banks break; /* fewer numbers than pools */ 474eed2965aSGreg Banks if (rv) 475eed2965aSGreg Banks goto out_free; /* syntax error */ 476eed2965aSGreg Banks rv = -EINVAL; 477eed2965aSGreg Banks if (nthreads[i] < 0) 478eed2965aSGreg Banks goto out_free; 47939d432fcSChuck Lever trace_nfsd_ctl_pool_threads(net, i, nthreads[i]); 480eed2965aSGreg Banks } 4813938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 482eed2965aSGreg Banks if (rv) 483eed2965aSGreg Banks goto out_free; 484eed2965aSGreg Banks } 485eed2965aSGreg Banks 4869dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 487eed2965aSGreg Banks if (rv) 488eed2965aSGreg Banks goto out_free; 489eed2965aSGreg Banks 490eed2965aSGreg Banks mesg = buf; 491eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 492eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 493eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 494eed2965aSGreg Banks len = strlen(mesg); 495eed2965aSGreg Banks size -= len; 496eed2965aSGreg Banks mesg += len; 497eed2965aSGreg Banks } 498413d63d7SJ. Bruce Fields rv = mesg - buf; 499eed2965aSGreg Banks out_free: 500eed2965aSGreg Banks kfree(nthreads); 501bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 502eed2965aSGreg Banks return rv; 503eed2965aSGreg Banks } 504eed2965aSGreg Banks 505ff7d1179STrond Myklebust static ssize_t 506e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 507e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 508ff7d1179STrond Myklebust { 509abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 510e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 511ff7d1179STrond Myklebust 512abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 513e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 514ff7d1179STrond Myklebust supported = false; 515abcb4dacSNeilBrown if (minor == 0 && supported) 516abcb4dacSNeilBrown /* 517abcb4dacSNeilBrown * special case for backward compatability. 518abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 519abcb4dacSNeilBrown * +4, unless -4.0 is present. 520abcb4dacSNeilBrown */ 521abcb4dacSNeilBrown return 0; 522ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 523ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 524ff7d1179STrond Myklebust } 525ff7d1179STrond Myklebust 5263dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 52770c3b76cSNeilBrown { 52870c3b76cSNeilBrown char *mesg = buf; 5298daf220aSBenny Halevy char *vers, *minorp, sign; 530261758b5SChuck Lever int len, num, remaining; 53170c3b76cSNeilBrown ssize_t tlen = 0; 53270c3b76cSNeilBrown char *sep; 533244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 53470c3b76cSNeilBrown 53570c3b76cSNeilBrown if (size > 0) { 5369dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5376658d3a7SNeilBrown /* Cannot change versions without updating 5389dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5396658d3a7SNeilBrown * rq_argp and rq_resp 5406658d3a7SNeilBrown */ 54170c3b76cSNeilBrown return -EBUSY; 54270c3b76cSNeilBrown if (buf[size-1] != '\n') 54370c3b76cSNeilBrown return -EINVAL; 54470c3b76cSNeilBrown buf[size-1] = 0; 54539d432fcSChuck Lever trace_nfsd_ctl_version(netns(file), buf); 54670c3b76cSNeilBrown 54770c3b76cSNeilBrown vers = mesg; 54870c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 54970c3b76cSNeilBrown if (len <= 0) return -EINVAL; 55070c3b76cSNeilBrown do { 551d3635ff0STrond Myklebust enum vers_op cmd; 552abcb4dacSNeilBrown unsigned minor; 55370c3b76cSNeilBrown sign = *vers; 55470c3b76cSNeilBrown if (sign == '+' || sign == '-') 5558daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 55670c3b76cSNeilBrown else 5578daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5588daf220aSBenny Halevy if (*minorp == '.') { 559ff89be87SJ. Bruce Fields if (num != 4) 5608daf220aSBenny Halevy return -EINVAL; 561e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5628daf220aSBenny Halevy return -EINVAL; 563abcb4dacSNeilBrown } 564abcb4dacSNeilBrown 565d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 56670c3b76cSNeilBrown switch(num) { 5672f3a4b2aSJeff Layton #ifdef CONFIG_NFSD_V2 56870c3b76cSNeilBrown case 2: 5692f3a4b2aSJeff Layton #endif 57070c3b76cSNeilBrown case 3: 571e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 572d3635ff0STrond Myklebust break; 57370c3b76cSNeilBrown case 4: 574abcb4dacSNeilBrown if (*minorp == '.') { 575e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 576abcb4dacSNeilBrown return -EINVAL; 577e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 578abcb4dacSNeilBrown /* 579abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 580abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 581abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 582abcb4dacSNeilBrown */ 583abcb4dacSNeilBrown minor = 0; 584e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 585abcb4dacSNeilBrown minor++; 586abcb4dacSNeilBrown } 58770c3b76cSNeilBrown break; 58870c3b76cSNeilBrown default: 5898e823bafSJeff Layton /* Ignore requests to disable non-existent versions */ 5908e823bafSJeff Layton if (cmd == NFSD_SET) 59170c3b76cSNeilBrown return -EINVAL; 59270c3b76cSNeilBrown } 59370c3b76cSNeilBrown vers += len + 1; 59470c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 59570c3b76cSNeilBrown /* If all get turned off, turn them back on, as 59670c3b76cSNeilBrown * having no versions is BAD 59770c3b76cSNeilBrown */ 598e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 59970c3b76cSNeilBrown } 600261758b5SChuck Lever 60170c3b76cSNeilBrown /* Now write current state into reply buffer */ 60270c3b76cSNeilBrown sep = ""; 603261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 604ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 605abcb4dacSNeilBrown int minor; 606e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 607e35659f1SNeilBrown continue; 608abcb4dacSNeilBrown 609abcb4dacSNeilBrown minor = -1; 610ff7d1179STrond Myklebust do { 611e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 612ff7d1179STrond Myklebust sep, num, minor); 613818f2f57SDan Carpenter if (len >= remaining) 614ff7d1179STrond Myklebust goto out; 615261758b5SChuck Lever remaining -= len; 616261758b5SChuck Lever buf += len; 617261758b5SChuck Lever tlen += len; 618ff7d1179STrond Myklebust minor++; 619abcb4dacSNeilBrown if (len) 620ff7d1179STrond Myklebust sep = " "; 621ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 622261758b5SChuck Lever } 623ff7d1179STrond Myklebust out: 624261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 625818f2f57SDan Carpenter if (len >= remaining) 626261758b5SChuck Lever return -EINVAL; 627261758b5SChuck Lever return tlen + len; 62870c3b76cSNeilBrown } 62970c3b76cSNeilBrown 630f2453978SChuck Lever /* 631262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 632262a0982SChuck Lever * 633262a0982SChuck Lever * Input: 634262a0982SChuck Lever * buf: ignored 635262a0982SChuck Lever * size: zero 636262a0982SChuck Lever * Output: 637262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 638262a0982SChuck Lever * string containing positive or negative integer 639262a0982SChuck Lever * values representing the current status of each 640262a0982SChuck Lever * protocol version; 641262a0982SChuck Lever * return code is the size in bytes of the string 642262a0982SChuck Lever * On error: return code is zero or a negative errno value 643262a0982SChuck Lever * 644262a0982SChuck Lever * OR 645262a0982SChuck Lever * 646262a0982SChuck Lever * Input: 647262a0982SChuck Lever * buf: C string containing whitespace- 648262a0982SChuck Lever * separated positive or negative 649262a0982SChuck Lever * integer values representing NFS 650262a0982SChuck Lever * protocol versions to enable ("+n") 651262a0982SChuck Lever * or disable ("-n") 652262a0982SChuck Lever * size: non-zero length of C string in @buf 653262a0982SChuck Lever * Output: 654262a0982SChuck Lever * On success: status of zero or more protocol versions has 655262a0982SChuck Lever * been updated; passed-in buffer filled with 656262a0982SChuck Lever * '\n'-terminated C string containing positive 657262a0982SChuck Lever * or negative integer values representing the 658262a0982SChuck Lever * current status of each protocol version; 659262a0982SChuck Lever * return code is the size in bytes of the string 660262a0982SChuck Lever * On error: return code is zero or a negative errno value 661262a0982SChuck Lever */ 6623dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6633dd98a3bSJeff Layton { 6643dd98a3bSJeff Layton ssize_t rv; 6653dd98a3bSJeff Layton 6663dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6673dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6683dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6693dd98a3bSJeff Layton return rv; 6703dd98a3bSJeff Layton } 6713dd98a3bSJeff Layton 6724cd5dc75SChuck Lever /* 6730a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 6740a5372d8SChuck Lever * transports. 6750a5372d8SChuck Lever */ 6769dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 6770a5372d8SChuck Lever { 6789dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6799dd9845fSStanislav Kinsbursky 6809dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 6810a5372d8SChuck Lever return 0; 6829dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 6830a5372d8SChuck Lever } 6840a5372d8SChuck Lever 6850a5372d8SChuck Lever /* 6860b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 6870b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 6880b7c2f6fSChuck Lever * nfsd listener. 6890b7c2f6fSChuck Lever */ 6904df493a2STrond Myklebust static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 6910b7c2f6fSChuck Lever { 6920b7c2f6fSChuck Lever char *mesg = buf; 6930b7c2f6fSChuck Lever int fd, err; 6949dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6950b7c2f6fSChuck Lever 6960b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 6970b7c2f6fSChuck Lever if (err != 0 || fd < 0) 6980b7c2f6fSChuck Lever return -EINVAL; 69939d432fcSChuck Lever trace_nfsd_ctl_ports_addfd(net, fd); 7000b7c2f6fSChuck Lever 7016777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7020b7c2f6fSChuck Lever if (err != 0) 7030b7c2f6fSChuck Lever return err; 7040b7c2f6fSChuck Lever 705c034203bSDan Carpenter err = svc_addsock(nn->nfsd_serv, net, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 706ea068badSChuck Lever 707ec52361dSNeilBrown if (err >= 0 && 708ec52361dSNeilBrown !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 709ec52361dSNeilBrown svc_get(nn->nfsd_serv); 710ec52361dSNeilBrown 711ec52361dSNeilBrown nfsd_put(net); 712ea068badSChuck Lever return err; 7130b7c2f6fSChuck Lever } 7140b7c2f6fSChuck Lever 7150b7c2f6fSChuck Lever /* 716442a6290SChuck Lever * A transport listener is added by writing its transport name and 7174eb68c26SChuck Lever * a port number. 7184eb68c26SChuck Lever */ 7194df493a2STrond Myklebust static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 7204eb68c26SChuck Lever { 7214eb68c26SChuck Lever char transport[16]; 72237498292SChuck Lever struct svc_xprt *xprt; 7234eb68c26SChuck Lever int port, err; 7249dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7254eb68c26SChuck Lever 726a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7274eb68c26SChuck Lever return -EINVAL; 7284eb68c26SChuck Lever 7294be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7304eb68c26SChuck Lever return -EINVAL; 73139d432fcSChuck Lever trace_nfsd_ctl_ports_addxprt(net, transport, port); 7324eb68c26SChuck Lever 7336777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7344eb68c26SChuck Lever if (err != 0) 7354eb68c26SChuck Lever return err; 7364eb68c26SChuck Lever 737352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7384df493a2STrond Myklebust PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 73968717908SChuck Lever if (err < 0) 74037498292SChuck Lever goto out_err; 74137498292SChuck Lever 742352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7434df493a2STrond Myklebust PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 74437498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 74537498292SChuck Lever goto out_close; 7460cd14a06SJeff Layton 747ec52361dSNeilBrown if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 748ec52361dSNeilBrown svc_get(nn->nfsd_serv); 749ec52361dSNeilBrown 750ec52361dSNeilBrown nfsd_put(net); 7514eb68c26SChuck Lever return 0; 75237498292SChuck Lever out_close: 7539dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 75437498292SChuck Lever if (xprt != NULL) { 7554355d767SChuck Lever svc_xprt_close(xprt); 75637498292SChuck Lever svc_xprt_put(xprt); 75737498292SChuck Lever } 75837498292SChuck Lever out_err: 7598c62d127SNeilBrown nfsd_put(net); 76037498292SChuck Lever return err; 7614eb68c26SChuck Lever } 7624eb68c26SChuck Lever 76308160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 76408160352SStanislav Kinsbursky struct net *net) 76580212d59SNeilBrown { 7660a5372d8SChuck Lever if (size == 0) 7679dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 7680b7c2f6fSChuck Lever 7690b7c2f6fSChuck Lever if (isdigit(buf[0])) 7704df493a2STrond Myklebust return __write_ports_addfd(buf, net, file->f_cred); 77182d56591SChuck Lever 7724eb68c26SChuck Lever if (isalpha(buf[0])) 7734df493a2STrond Myklebust return __write_ports_addxprt(buf, net, file->f_cred); 7744cd5dc75SChuck Lever 775b41b66d6SNeilBrown return -EINVAL; 776b41b66d6SNeilBrown } 77780212d59SNeilBrown 778f2453978SChuck Lever /* 779262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 780262a0982SChuck Lever * 781262a0982SChuck Lever * Input: 782262a0982SChuck Lever * buf: ignored 783262a0982SChuck Lever * size: zero 784262a0982SChuck Lever * Output: 785262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 786262a0982SChuck Lever * string containing a whitespace-separated list of 787262a0982SChuck Lever * named NFSD listeners; 788262a0982SChuck Lever * return code is the size in bytes of the string 789262a0982SChuck Lever * On error: return code is zero or a negative errno value 790262a0982SChuck Lever * 791262a0982SChuck Lever * OR 792262a0982SChuck Lever * 793262a0982SChuck Lever * Input: 794262a0982SChuck Lever * buf: C string containing an unsigned 795262a0982SChuck Lever * integer value representing a bound 796262a0982SChuck Lever * but unconnected socket that is to be 797c71206a7SChuck Lever * used as an NFSD listener; listen(3) 798c71206a7SChuck Lever * must be called for a SOCK_STREAM 799c71206a7SChuck Lever * socket, otherwise it is ignored 800262a0982SChuck Lever * size: non-zero length of C string in @buf 801262a0982SChuck Lever * Output: 802262a0982SChuck Lever * On success: NFS service is started; 803262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 804262a0982SChuck Lever * string containing a unique alphanumeric name of 805262a0982SChuck Lever * the listener; 806262a0982SChuck Lever * return code is the size in bytes of the string 807262a0982SChuck Lever * On error: return code is a negative errno value 808262a0982SChuck Lever * 809262a0982SChuck Lever * OR 810262a0982SChuck Lever * 811262a0982SChuck Lever * Input: 812262a0982SChuck Lever * buf: C string containing a transport 813262a0982SChuck Lever * name and an unsigned integer value 814262a0982SChuck Lever * representing the port to listen on, 815262a0982SChuck Lever * separated by whitespace 816262a0982SChuck Lever * size: non-zero length of C string in @buf 817262a0982SChuck Lever * Output: 818262a0982SChuck Lever * On success: returns zero; NFS service is started 819262a0982SChuck Lever * On error: return code is a negative errno value 820262a0982SChuck Lever */ 821bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 822bedbdd8bSNeil Brown { 823bedbdd8bSNeil Brown ssize_t rv; 8243dd98a3bSJeff Layton 825bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 826244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 827bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 828bedbdd8bSNeil Brown return rv; 829bedbdd8bSNeil Brown } 830bedbdd8bSNeil Brown 831bedbdd8bSNeil Brown 832596bbe53SNeilBrown int nfsd_max_blksize; 833596bbe53SNeilBrown 834f2453978SChuck Lever /* 835262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 836262a0982SChuck Lever * 837262a0982SChuck Lever * Input: 838262a0982SChuck Lever * buf: ignored 839262a0982SChuck Lever * size: zero 840262a0982SChuck Lever * 841262a0982SChuck Lever * OR 842262a0982SChuck Lever * 843262a0982SChuck Lever * Input: 844262a0982SChuck Lever * buf: C string containing an unsigned 845262a0982SChuck Lever * integer value representing the new 846262a0982SChuck Lever * NFS blksize 847262a0982SChuck Lever * size: non-zero length of C string in @buf 848262a0982SChuck Lever * Output: 849262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 850262a0982SChuck Lever * containing numeric value of the current NFS blksize 851262a0982SChuck Lever * setting; 852262a0982SChuck Lever * return code is the size in bytes of the string 853262a0982SChuck Lever * On error: return code is zero or a negative errno value 854262a0982SChuck Lever */ 855596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 856596bbe53SNeilBrown { 857596bbe53SNeilBrown char *mesg = buf; 858244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8599dd9845fSStanislav Kinsbursky 860596bbe53SNeilBrown if (size > 0) { 861596bbe53SNeilBrown int bsize; 862596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 863596bbe53SNeilBrown if (rv) 864596bbe53SNeilBrown return rv; 86539d432fcSChuck Lever trace_nfsd_ctl_maxblksize(netns(file), bsize); 86639d432fcSChuck Lever 867596bbe53SNeilBrown /* force bsize into allowed range and 868596bbe53SNeilBrown * required alignment. 869596bbe53SNeilBrown */ 8703c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 8713c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 872596bbe53SNeilBrown bsize &= ~(1024-1); 873bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 8749dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 875bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 876596bbe53SNeilBrown return -EBUSY; 877596bbe53SNeilBrown } 878596bbe53SNeilBrown nfsd_max_blksize = bsize; 879bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 880596bbe53SNeilBrown } 881e06b6405SChuck Lever 882e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 883e06b6405SChuck Lever nfsd_max_blksize); 884596bbe53SNeilBrown } 885596bbe53SNeilBrown 886f2453978SChuck Lever /* 8875b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 8885b8db00bSJeff Layton * 8895b8db00bSJeff Layton * Input: 8905b8db00bSJeff Layton * buf: ignored 8915b8db00bSJeff Layton * size: zero 8925b8db00bSJeff Layton * OR 8935b8db00bSJeff Layton * 8945b8db00bSJeff Layton * Input: 8955b8db00bSJeff Layton * buf: C string containing an unsigned 8965b8db00bSJeff Layton * integer value representing the new 8975b8db00bSJeff Layton * number of max connections 8985b8db00bSJeff Layton * size: non-zero length of C string in @buf 8995b8db00bSJeff Layton * Output: 9005b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9015b8db00bSJeff Layton * containing numeric value of max_connections setting 9025b8db00bSJeff Layton * for this net namespace; 9035b8db00bSJeff Layton * return code is the size in bytes of the string 9045b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9055b8db00bSJeff Layton */ 9065b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9075b8db00bSJeff Layton { 9085b8db00bSJeff Layton char *mesg = buf; 909244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9105b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9115b8db00bSJeff Layton 9125b8db00bSJeff Layton if (size > 0) { 9135b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9145b8db00bSJeff Layton 9155b8db00bSJeff Layton if (rv) 9165b8db00bSJeff Layton return rv; 91739d432fcSChuck Lever trace_nfsd_ctl_maxconn(netns(file), maxconn); 9185b8db00bSJeff Layton nn->max_connections = maxconn; 9195b8db00bSJeff Layton } 9205b8db00bSJeff Layton 9215b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9225b8db00bSJeff Layton } 9235b8db00bSJeff Layton 92470c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9259dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 92620b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 9271da177e4SLinus Torvalds { 92839d432fcSChuck Lever struct dentry *dentry = file_dentry(file); 9291da177e4SLinus Torvalds char *mesg = buf; 930f0135740SJ. Bruce Fields int rv, i; 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds if (size > 0) { 9339dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9343dd98a3bSJeff Layton return -EBUSY; 935f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9361da177e4SLinus Torvalds if (rv) 9371da177e4SLinus Torvalds return rv; 93839d432fcSChuck Lever trace_nfsd_ctl_time(netns(file), dentry->d_name.name, 93939d432fcSChuck Lever dentry->d_name.len, i); 94039d432fcSChuck Lever 941e7b184f1SJ. Bruce Fields /* 942e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 943e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 944e7b184f1SJ. Bruce Fields * extremes are: 945e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 946e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 947e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 948e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 949e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 950e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 951e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 952e7b184f1SJ. Bruce Fields */ 953f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9541da177e4SLinus Torvalds return -EINVAL; 955f0135740SJ. Bruce Fields *time = i; 9561da177e4SLinus Torvalds } 957e06b6405SChuck Lever 95820b7d86fSArnd Bergmann return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); 959f0135740SJ. Bruce Fields } 960f0135740SJ. Bruce Fields 9619dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 96220b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 963f0135740SJ. Bruce Fields { 964f0135740SJ. Bruce Fields ssize_t rv; 965f0135740SJ. Bruce Fields 966f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9679dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 968f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 969f0135740SJ. Bruce Fields return rv; 9701da177e4SLinus Torvalds } 9711da177e4SLinus Torvalds 972f2453978SChuck Lever /* 973262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 974262a0982SChuck Lever * 975262a0982SChuck Lever * Input: 976262a0982SChuck Lever * buf: ignored 977262a0982SChuck Lever * size: zero 978262a0982SChuck Lever * 979262a0982SChuck Lever * OR 980262a0982SChuck Lever * 981262a0982SChuck Lever * Input: 982262a0982SChuck Lever * buf: C string containing an unsigned 983262a0982SChuck Lever * integer value representing the new 984262a0982SChuck Lever * NFSv4 lease expiry time 985262a0982SChuck Lever * size: non-zero length of C string in @buf 986262a0982SChuck Lever * Output: 987262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 988262a0982SChuck Lever * string containing unsigned integer value of the 989262a0982SChuck Lever * current lease expiry time; 990262a0982SChuck Lever * return code is the size in bytes of the string 991262a0982SChuck Lever * On error: return code is zero or a negative errno value 992262a0982SChuck Lever */ 9933dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 9943dd98a3bSJeff Layton { 995244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9969dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 9973dd98a3bSJeff Layton } 9983dd98a3bSJeff Layton 999f2453978SChuck Lever /* 1000efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1001efc4bb4fSJ. Bruce Fields * 1002efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1003efc4bb4fSJ. Bruce Fields * 1004efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1005efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1006efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1007efc4bb4fSJ. Bruce Fields * anyway.) 1008efc4bb4fSJ. Bruce Fields */ 1009efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1010efc4bb4fSJ. Bruce Fields { 1011244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10129dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1013efc4bb4fSJ. Bruce Fields } 1014efc4bb4fSJ. Bruce Fields 10159dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10169dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10170964a3d3SNeilBrown { 10180964a3d3SNeilBrown char *mesg = buf; 10190964a3d3SNeilBrown char *recdir; 10200964a3d3SNeilBrown int len, status; 10210964a3d3SNeilBrown 10223dd98a3bSJeff Layton if (size > 0) { 10239dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10243dd98a3bSJeff Layton return -EBUSY; 10253dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10260964a3d3SNeilBrown return -EINVAL; 10270964a3d3SNeilBrown buf[size-1] = 0; 10280964a3d3SNeilBrown 10290964a3d3SNeilBrown recdir = mesg; 10300964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10310964a3d3SNeilBrown if (len <= 0) 10320964a3d3SNeilBrown return -EINVAL; 103339d432fcSChuck Lever trace_nfsd_ctl_recoverydir(netns(file), recdir); 10340964a3d3SNeilBrown 10350964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 103669049961SAndi Kleen if (status) 103769049961SAndi Kleen return status; 10383dd98a3bSJeff Layton } 10393d72ab8fSChuck Lever 10403d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10413d72ab8fSChuck Lever nfs4_recoverydir()); 10420964a3d3SNeilBrown } 10433dd98a3bSJeff Layton 1044f2453978SChuck Lever /* 1045262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1046262a0982SChuck Lever * 1047262a0982SChuck Lever * Input: 1048262a0982SChuck Lever * buf: ignored 1049262a0982SChuck Lever * size: zero 1050262a0982SChuck Lever * 1051262a0982SChuck Lever * OR 1052262a0982SChuck Lever * 1053262a0982SChuck Lever * Input: 1054262a0982SChuck Lever * buf: C string containing the pathname 1055262a0982SChuck Lever * of the directory on a local file 1056262a0982SChuck Lever * system containing permanent NFSv4 1057262a0982SChuck Lever * recovery data 1058262a0982SChuck Lever * size: non-zero length of C string in @buf 1059262a0982SChuck Lever * Output: 1060262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1061262a0982SChuck Lever * containing the current recovery pathname setting; 1062262a0982SChuck Lever * return code is the size in bytes of the string 1063262a0982SChuck Lever * On error: return code is zero or a negative errno value 1064262a0982SChuck Lever */ 10653dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10663dd98a3bSJeff Layton { 10673dd98a3bSJeff Layton ssize_t rv; 1068244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10693dd98a3bSJeff Layton 10703dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10719dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10723dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10733dd98a3bSJeff Layton return rv; 10743dd98a3bSJeff Layton } 10753dd98a3bSJeff Layton 1076f2453978SChuck Lever /* 10777f5ef2e9SJeff Layton * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 10787f5ef2e9SJeff Layton * 10797f5ef2e9SJeff Layton * Input: 10807f5ef2e9SJeff Layton * buf: ignored 10817f5ef2e9SJeff Layton * size: zero 10827f5ef2e9SJeff Layton * OR 10837f5ef2e9SJeff Layton * 10847f5ef2e9SJeff Layton * Input: 10857f5ef2e9SJeff Layton * buf: any value 10867f5ef2e9SJeff Layton * size: non-zero length of C string in @buf 10877f5ef2e9SJeff Layton * Output: 10887f5ef2e9SJeff Layton * passed-in buffer filled with "Y" or "N" with a newline 10897f5ef2e9SJeff Layton * and NULL-terminated C string. This indicates whether 10907f5ef2e9SJeff Layton * the grace period has ended in the current net 10917f5ef2e9SJeff Layton * namespace. Return code is the size in bytes of the 10927f5ef2e9SJeff Layton * string. Writing a string that starts with 'Y', 'y', or 10937f5ef2e9SJeff Layton * '1' to the file will end the grace period for nfsd's v4 10947f5ef2e9SJeff Layton * lock manager. 10957f5ef2e9SJeff Layton */ 10967f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 10977f5ef2e9SJeff Layton { 1098244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10997f5ef2e9SJeff Layton 11007f5ef2e9SJeff Layton if (size > 0) { 11017f5ef2e9SJeff Layton switch(buf[0]) { 11027f5ef2e9SJeff Layton case 'Y': 11037f5ef2e9SJeff Layton case 'y': 11047f5ef2e9SJeff Layton case '1': 1105dd838821SYihao Wu if (!nn->nfsd_serv) 110662a063b8SJ. Bruce Fields return -EBUSY; 110739d432fcSChuck Lever trace_nfsd_end_grace(netns(file)); 11087f5ef2e9SJeff Layton break; 11097f5ef2e9SJeff Layton default: 11107f5ef2e9SJeff Layton return -EINVAL; 11117f5ef2e9SJeff Layton } 11127f5ef2e9SJeff Layton } 11137f5ef2e9SJeff Layton 11147f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 11157f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 11167f5ef2e9SJeff Layton } 11177f5ef2e9SJeff Layton 111870c3b76cSNeilBrown #endif 11190964a3d3SNeilBrown 11201da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11211da177e4SLinus Torvalds /* 11221da177e4SLinus Torvalds * populating the filesystem. 11231da177e4SLinus Torvalds */ 11241da177e4SLinus Torvalds 1125e8a79fb1SJ. Bruce Fields /* Basically copying rpc_get_inode. */ 1126e8a79fb1SJ. Bruce Fields static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) 1127e8a79fb1SJ. Bruce Fields { 1128e8a79fb1SJ. Bruce Fields struct inode *inode = new_inode(sb); 1129e8a79fb1SJ. Bruce Fields if (!inode) 1130e8a79fb1SJ. Bruce Fields return NULL; 1131e8a79fb1SJ. Bruce Fields /* Following advice from simple_fill_super documentation: */ 1132e8a79fb1SJ. Bruce Fields inode->i_ino = iunique(sb, NFSD_MaxReserved); 1133e8a79fb1SJ. Bruce Fields inode->i_mode = mode; 1134e8a79fb1SJ. Bruce Fields inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 1135e8a79fb1SJ. Bruce Fields switch (mode & S_IFMT) { 1136e8a79fb1SJ. Bruce Fields case S_IFDIR: 1137e8a79fb1SJ. Bruce Fields inode->i_fop = &simple_dir_operations; 1138e8a79fb1SJ. Bruce Fields inode->i_op = &simple_dir_inode_operations; 1139e8a79fb1SJ. Bruce Fields inc_nlink(inode); 114076c50eb7SGustavo A. R. Silva break; 11414df750c9SChuck Lever case S_IFLNK: 11424df750c9SChuck Lever inode->i_op = &simple_symlink_inode_operations; 11434df750c9SChuck Lever break; 1144e8a79fb1SJ. Bruce Fields default: 1145e8a79fb1SJ. Bruce Fields break; 1146e8a79fb1SJ. Bruce Fields } 1147e8a79fb1SJ. Bruce Fields return inode; 1148e8a79fb1SJ. Bruce Fields } 1149e8a79fb1SJ. Bruce Fields 1150bebd6997SJ. Bruce Fields static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) 1151e8a79fb1SJ. Bruce Fields { 1152e8a79fb1SJ. Bruce Fields struct inode *inode; 1153e8a79fb1SJ. Bruce Fields 1154e8a79fb1SJ. Bruce Fields inode = nfsd_get_inode(dir->i_sb, mode); 1155e8a79fb1SJ. Bruce Fields if (!inode) 1156e8a79fb1SJ. Bruce Fields return -ENOMEM; 1157bebd6997SJ. Bruce Fields if (ncl) { 1158bebd6997SJ. Bruce Fields inode->i_private = ncl; 1159bebd6997SJ. Bruce Fields kref_get(&ncl->cl_ref); 1160bebd6997SJ. Bruce Fields } 1161e8a79fb1SJ. Bruce Fields d_add(dentry, inode); 1162e8a79fb1SJ. Bruce Fields inc_nlink(dir); 1163e8a79fb1SJ. Bruce Fields fsnotify_mkdir(dir, dentry); 1164e8a79fb1SJ. Bruce Fields return 0; 1165e8a79fb1SJ. Bruce Fields } 1166e8a79fb1SJ. Bruce Fields 1167e8a79fb1SJ. Bruce Fields static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) 1168e8a79fb1SJ. Bruce Fields { 1169e8a79fb1SJ. Bruce Fields struct inode *dir = parent->d_inode; 1170e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1171e8a79fb1SJ. Bruce Fields int ret = -ENOMEM; 1172e8a79fb1SJ. Bruce Fields 1173e8a79fb1SJ. Bruce Fields inode_lock(dir); 1174e8a79fb1SJ. Bruce Fields dentry = d_alloc_name(parent, name); 1175e8a79fb1SJ. Bruce Fields if (!dentry) 1176e8a79fb1SJ. Bruce Fields goto out_err; 1177bebd6997SJ. Bruce Fields ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); 1178e8a79fb1SJ. Bruce Fields if (ret) 1179e8a79fb1SJ. Bruce Fields goto out_err; 1180e8a79fb1SJ. Bruce Fields out: 1181e8a79fb1SJ. Bruce Fields inode_unlock(dir); 1182e8a79fb1SJ. Bruce Fields return dentry; 1183e8a79fb1SJ. Bruce Fields out_err: 1184d6846bfbSTetsuo Handa dput(dentry); 1185e8a79fb1SJ. Bruce Fields dentry = ERR_PTR(ret); 1186e8a79fb1SJ. Bruce Fields goto out; 1187e8a79fb1SJ. Bruce Fields } 1188e8a79fb1SJ. Bruce Fields 11894df750c9SChuck Lever #if IS_ENABLED(CONFIG_SUNRPC_GSS) 11904df750c9SChuck Lever static int __nfsd_symlink(struct inode *dir, struct dentry *dentry, 11914df750c9SChuck Lever umode_t mode, const char *content) 11924df750c9SChuck Lever { 11934df750c9SChuck Lever struct inode *inode; 11944df750c9SChuck Lever 11954df750c9SChuck Lever inode = nfsd_get_inode(dir->i_sb, mode); 11964df750c9SChuck Lever if (!inode) 11974df750c9SChuck Lever return -ENOMEM; 11984df750c9SChuck Lever 11994df750c9SChuck Lever inode->i_link = (char *)content; 12004df750c9SChuck Lever inode->i_size = strlen(content); 12014df750c9SChuck Lever 12024df750c9SChuck Lever d_add(dentry, inode); 12034df750c9SChuck Lever inc_nlink(dir); 12044df750c9SChuck Lever fsnotify_create(dir, dentry); 12054df750c9SChuck Lever return 0; 12064df750c9SChuck Lever } 12074df750c9SChuck Lever 12084df750c9SChuck Lever /* 12094df750c9SChuck Lever * @content is assumed to be a NUL-terminated string that lives 12104df750c9SChuck Lever * longer than the symlink itself. 12114df750c9SChuck Lever */ 121239d432fcSChuck Lever static void _nfsd_symlink(struct dentry *parent, const char *name, 12134df750c9SChuck Lever const char *content) 12144df750c9SChuck Lever { 12154df750c9SChuck Lever struct inode *dir = parent->d_inode; 12164df750c9SChuck Lever struct dentry *dentry; 12174b471a8bSChuck Lever int ret; 12184df750c9SChuck Lever 12194df750c9SChuck Lever inode_lock(dir); 12204df750c9SChuck Lever dentry = d_alloc_name(parent, name); 12214df750c9SChuck Lever if (!dentry) 12224b471a8bSChuck Lever goto out; 12234df750c9SChuck Lever ret = __nfsd_symlink(d_inode(parent), dentry, S_IFLNK | 0777, content); 12244df750c9SChuck Lever if (ret) 12254b471a8bSChuck Lever dput(dentry); 12264df750c9SChuck Lever out: 12274df750c9SChuck Lever inode_unlock(dir); 12284df750c9SChuck Lever } 12294df750c9SChuck Lever #else 123039d432fcSChuck Lever static inline void _nfsd_symlink(struct dentry *parent, const char *name, 12314df750c9SChuck Lever const char *content) 12324df750c9SChuck Lever { 12334df750c9SChuck Lever } 12344df750c9SChuck Lever 12354df750c9SChuck Lever #endif 12364df750c9SChuck Lever 123797ad4031SJ. Bruce Fields static void clear_ncl(struct inode *inode) 1238e8a79fb1SJ. Bruce Fields { 123997ad4031SJ. Bruce Fields struct nfsdfs_client *ncl = inode->i_private; 124097ad4031SJ. Bruce Fields 124197ad4031SJ. Bruce Fields inode->i_private = NULL; 124297ad4031SJ. Bruce Fields kref_put(&ncl->cl_ref, ncl->cl_release); 124397ad4031SJ. Bruce Fields } 124497ad4031SJ. Bruce Fields 1245b78fa45dSYueHaibing static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) 124697ad4031SJ. Bruce Fields { 124797ad4031SJ. Bruce Fields struct nfsdfs_client *nc = inode->i_private; 124897ad4031SJ. Bruce Fields 124997ad4031SJ. Bruce Fields if (nc) 125097ad4031SJ. Bruce Fields kref_get(&nc->cl_ref); 125197ad4031SJ. Bruce Fields return nc; 125297ad4031SJ. Bruce Fields } 125397ad4031SJ. Bruce Fields 125497ad4031SJ. Bruce Fields struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) 125597ad4031SJ. Bruce Fields { 125697ad4031SJ. Bruce Fields struct nfsdfs_client *nc; 125797ad4031SJ. Bruce Fields 1258dc46bba7SJ. Bruce Fields inode_lock_shared(inode); 125997ad4031SJ. Bruce Fields nc = __get_nfsdfs_client(inode); 1260dc46bba7SJ. Bruce Fields inode_unlock_shared(inode); 126197ad4031SJ. Bruce Fields return nc; 126297ad4031SJ. Bruce Fields } 126397ad4031SJ. Bruce Fields /* from __rpc_unlink */ 126497ad4031SJ. Bruce Fields static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) 126597ad4031SJ. Bruce Fields { 126697ad4031SJ. Bruce Fields int ret; 126797ad4031SJ. Bruce Fields 126897ad4031SJ. Bruce Fields clear_ncl(d_inode(dentry)); 126997ad4031SJ. Bruce Fields dget(dentry); 127097ad4031SJ. Bruce Fields ret = simple_unlink(dir, dentry); 127129044daeSAmir Goldstein d_drop(dentry); 127229044daeSAmir Goldstein fsnotify_unlink(dir, dentry); 127397ad4031SJ. Bruce Fields dput(dentry); 127497ad4031SJ. Bruce Fields WARN_ON_ONCE(ret); 127597ad4031SJ. Bruce Fields } 127697ad4031SJ. Bruce Fields 127797ad4031SJ. Bruce Fields static void nfsdfs_remove_files(struct dentry *root) 127897ad4031SJ. Bruce Fields { 127997ad4031SJ. Bruce Fields struct dentry *dentry, *tmp; 128097ad4031SJ. Bruce Fields 128197ad4031SJ. Bruce Fields list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { 128297ad4031SJ. Bruce Fields if (!simple_positive(dentry)) { 128397ad4031SJ. Bruce Fields WARN_ON_ONCE(1); /* I think this can't happen? */ 128497ad4031SJ. Bruce Fields continue; 128597ad4031SJ. Bruce Fields } 128697ad4031SJ. Bruce Fields nfsdfs_remove_file(d_inode(root), dentry); 128797ad4031SJ. Bruce Fields } 128897ad4031SJ. Bruce Fields } 128997ad4031SJ. Bruce Fields 129097ad4031SJ. Bruce Fields /* XXX: cut'n'paste from simple_fill_super; figure out if we could share 129197ad4031SJ. Bruce Fields * code instead. */ 129297ad4031SJ. Bruce Fields static int nfsdfs_create_files(struct dentry *root, 1293472d155aSNeilBrown const struct tree_descr *files, 1294472d155aSNeilBrown struct dentry **fdentries) 129597ad4031SJ. Bruce Fields { 129697ad4031SJ. Bruce Fields struct inode *dir = d_inode(root); 129797ad4031SJ. Bruce Fields struct inode *inode; 129897ad4031SJ. Bruce Fields struct dentry *dentry; 129997ad4031SJ. Bruce Fields int i; 130097ad4031SJ. Bruce Fields 130197ad4031SJ. Bruce Fields inode_lock(dir); 130297ad4031SJ. Bruce Fields for (i = 0; files->name && files->name[0]; i++, files++) { 130397ad4031SJ. Bruce Fields dentry = d_alloc_name(root, files->name); 130497ad4031SJ. Bruce Fields if (!dentry) 130597ad4031SJ. Bruce Fields goto out; 130697ad4031SJ. Bruce Fields inode = nfsd_get_inode(d_inode(root)->i_sb, 130797ad4031SJ. Bruce Fields S_IFREG | files->mode); 130897ad4031SJ. Bruce Fields if (!inode) { 130997ad4031SJ. Bruce Fields dput(dentry); 131097ad4031SJ. Bruce Fields goto out; 131197ad4031SJ. Bruce Fields } 131297ad4031SJ. Bruce Fields inode->i_fop = files->ops; 131397ad4031SJ. Bruce Fields inode->i_private = __get_nfsdfs_client(dir); 131497ad4031SJ. Bruce Fields d_add(dentry, inode); 131597ad4031SJ. Bruce Fields fsnotify_create(dir, dentry); 1316472d155aSNeilBrown if (fdentries) 1317472d155aSNeilBrown fdentries[i] = dentry; 131897ad4031SJ. Bruce Fields } 131997ad4031SJ. Bruce Fields inode_unlock(dir); 132097ad4031SJ. Bruce Fields return 0; 132197ad4031SJ. Bruce Fields out: 132297ad4031SJ. Bruce Fields nfsdfs_remove_files(root); 132397ad4031SJ. Bruce Fields inode_unlock(dir); 132497ad4031SJ. Bruce Fields return -ENOMEM; 132597ad4031SJ. Bruce Fields } 132697ad4031SJ. Bruce Fields 132797ad4031SJ. Bruce Fields /* on success, returns positive number unique to that client. */ 132897ad4031SJ. Bruce Fields struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 132997ad4031SJ. Bruce Fields struct nfsdfs_client *ncl, u32 id, 1330472d155aSNeilBrown const struct tree_descr *files, 1331472d155aSNeilBrown struct dentry **fdentries) 133297ad4031SJ. Bruce Fields { 133397ad4031SJ. Bruce Fields struct dentry *dentry; 1334e8a79fb1SJ. Bruce Fields char name[11]; 133597ad4031SJ. Bruce Fields int ret; 1336e8a79fb1SJ. Bruce Fields 1337bf5ed3e3SJ. Bruce Fields sprintf(name, "%u", id); 1338e8a79fb1SJ. Bruce Fields 133997ad4031SJ. Bruce Fields dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); 134097ad4031SJ. Bruce Fields if (IS_ERR(dentry)) /* XXX: tossing errors? */ 134197ad4031SJ. Bruce Fields return NULL; 1342472d155aSNeilBrown ret = nfsdfs_create_files(dentry, files, fdentries); 134397ad4031SJ. Bruce Fields if (ret) { 134497ad4031SJ. Bruce Fields nfsd_client_rmdir(dentry); 134597ad4031SJ. Bruce Fields return NULL; 134697ad4031SJ. Bruce Fields } 134797ad4031SJ. Bruce Fields return dentry; 1348e8a79fb1SJ. Bruce Fields } 1349e8a79fb1SJ. Bruce Fields 1350e8a79fb1SJ. Bruce Fields /* Taken from __rpc_rmdir: */ 1351e8a79fb1SJ. Bruce Fields void nfsd_client_rmdir(struct dentry *dentry) 1352e8a79fb1SJ. Bruce Fields { 1353e8a79fb1SJ. Bruce Fields struct inode *dir = d_inode(dentry->d_parent); 1354e8a79fb1SJ. Bruce Fields struct inode *inode = d_inode(dentry); 1355e8a79fb1SJ. Bruce Fields int ret; 1356e8a79fb1SJ. Bruce Fields 135797ad4031SJ. Bruce Fields inode_lock(dir); 135897ad4031SJ. Bruce Fields nfsdfs_remove_files(dentry); 135997ad4031SJ. Bruce Fields clear_ncl(inode); 1360e8a79fb1SJ. Bruce Fields dget(dentry); 1361e8a79fb1SJ. Bruce Fields ret = simple_rmdir(dir, dentry); 1362e8a79fb1SJ. Bruce Fields WARN_ON_ONCE(ret); 136329044daeSAmir Goldstein d_drop(dentry); 136469afd267SJ. Bruce Fields fsnotify_rmdir(dir, dentry); 1365bf265401SJ. Bruce Fields dput(dentry); 136697ad4031SJ. Bruce Fields inode_unlock(dir); 1367e8a79fb1SJ. Bruce Fields } 1368e8a79fb1SJ. Bruce Fields 136996a374a3SDavid Howells static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) 13701da177e4SLinus Torvalds { 1371e8a79fb1SJ. Bruce Fields struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 1372e8a79fb1SJ. Bruce Fields nfsd_net_id); 1373e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1374e8a79fb1SJ. Bruce Fields int ret; 1375e8a79fb1SJ. Bruce Fields 1376cda37124SEric Biggers static const struct tree_descr nfsd_files[] = { 137796d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 137820ad856eSAmir Goldstein /* Per-export io stats use same ops as exports file */ 137920ad856eSAmir Goldstein [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO}, 1380e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 13819beeaab8SChenXiaoSong &export_features_fops, S_IRUGO}, 13824373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13834373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 138417efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 138517efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13861da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13871da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1388eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 138903cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 139064776611SChenXiaoSong [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", 139164776611SChenXiaoSong &nfsd_reply_cache_stats_fops, S_IRUGO}, 139270c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 139380212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1394596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13955b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 13961342f9ddSChenXiaoSong [NFSD_Filecache] = {"filecache", &nfsd_file_cache_stats_fops, S_IRUGO}, 13971da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13981da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1399efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 14000964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 14017f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 14021da177e4SLinus Torvalds #endif 14031da177e4SLinus Torvalds /* last one */ {""} 14041da177e4SLinus Torvalds }; 140596a374a3SDavid Howells 1406e8a79fb1SJ. Bruce Fields ret = simple_fill_super(sb, 0x6e667364, nfsd_files); 1407e8a79fb1SJ. Bruce Fields if (ret) 1408e8a79fb1SJ. Bruce Fields return ret; 140939d432fcSChuck Lever _nfsd_symlink(sb->s_root, "supported_krb5_enctypes", 14104df750c9SChuck Lever "/proc/net/rpc/gss_krb5_enctypes"); 1411e8a79fb1SJ. Bruce Fields dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); 1412e8a79fb1SJ. Bruce Fields if (IS_ERR(dentry)) 1413e8a79fb1SJ. Bruce Fields return PTR_ERR(dentry); 1414e8a79fb1SJ. Bruce Fields nn->nfsd_client_dir = dentry; 1415e8a79fb1SJ. Bruce Fields return 0; 14161da177e4SLinus Torvalds } 14171da177e4SLinus Torvalds 141896a374a3SDavid Howells static int nfsd_fs_get_tree(struct fs_context *fc) 14191da177e4SLinus Torvalds { 1420533770ccSAl Viro return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); 142196a374a3SDavid Howells } 142296a374a3SDavid Howells 142396a374a3SDavid Howells static void nfsd_fs_free_fc(struct fs_context *fc) 142496a374a3SDavid Howells { 142596a374a3SDavid Howells if (fc->s_fs_info) 142696a374a3SDavid Howells put_net(fc->s_fs_info); 142796a374a3SDavid Howells } 142896a374a3SDavid Howells 142996a374a3SDavid Howells static const struct fs_context_operations nfsd_fs_context_ops = { 143096a374a3SDavid Howells .free = nfsd_fs_free_fc, 143196a374a3SDavid Howells .get_tree = nfsd_fs_get_tree, 143296a374a3SDavid Howells }; 143396a374a3SDavid Howells 143496a374a3SDavid Howells static int nfsd_init_fs_context(struct fs_context *fc) 143596a374a3SDavid Howells { 143696a374a3SDavid Howells put_user_ns(fc->user_ns); 143796a374a3SDavid Howells fc->user_ns = get_user_ns(fc->net_ns->user_ns); 143896a374a3SDavid Howells fc->ops = &nfsd_fs_context_ops; 143996a374a3SDavid Howells return 0; 144011f77942SStanislav Kinsbursky } 144111f77942SStanislav Kinsbursky 144211f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 144311f77942SStanislav Kinsbursky { 144411f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 144511f77942SStanislav Kinsbursky 1446c6c7f2a8STrond Myklebust nfsd_shutdown_threads(net); 1447c6c7f2a8STrond Myklebust 144811f77942SStanislav Kinsbursky kill_litter_super(sb); 144911f77942SStanislav Kinsbursky put_net(net); 14501da177e4SLinus Torvalds } 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 14531da177e4SLinus Torvalds .owner = THIS_MODULE, 14541da177e4SLinus Torvalds .name = "nfsd", 145596a374a3SDavid Howells .init_fs_context = nfsd_init_fs_context, 145611f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 14571da177e4SLinus Torvalds }; 14587f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 14591da177e4SLinus Torvalds 1460e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1461340086daSTom Rix 1462340086daSTom Rix static int exports_proc_open(struct inode *inode, struct file *file) 1463340086daSTom Rix { 1464340086daSTom Rix return exports_net_open(current->nsproxy->net_ns, file); 1465340086daSTom Rix } 1466340086daSTom Rix 1467340086daSTom Rix static const struct proc_ops exports_proc_ops = { 1468340086daSTom Rix .proc_open = exports_proc_open, 1469340086daSTom Rix .proc_read = seq_read, 1470340086daSTom Rix .proc_lseek = seq_lseek, 1471340086daSTom Rix .proc_release = seq_release, 1472340086daSTom Rix }; 1473340086daSTom Rix 1474e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1475e331f606SJ. Bruce Fields { 1476e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1477e331f606SJ. Bruce Fields 1478e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1479e331f606SJ. Bruce Fields if (!entry) 1480e331f606SJ. Bruce Fields return -ENOMEM; 148197a32539SAlexey Dobriyan entry = proc_create("exports", 0, entry, &exports_proc_ops); 1482ff7c4b36Sfanchaoting if (!entry) { 1483ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1484e331f606SJ. Bruce Fields return -ENOMEM; 1485ff7c4b36Sfanchaoting } 1486e331f606SJ. Bruce Fields return 0; 1487e331f606SJ. Bruce Fields } 1488e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1489e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1490e331f606SJ. Bruce Fields { 1491e331f606SJ. Bruce Fields return 0; 1492e331f606SJ. Bruce Fields } 1493e331f606SJ. Bruce Fields #endif 1494e331f606SJ. Bruce Fields 1495c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 14965717e012SStanislav Kinsbursky 14975717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 14985717e012SStanislav Kinsbursky { 14995717e012SStanislav Kinsbursky int retval; 15003d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 15015717e012SStanislav Kinsbursky 15025717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 15035717e012SStanislav Kinsbursky if (retval) 15045717e012SStanislav Kinsbursky goto out_export_error; 1505f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1506f69adb2fSStanislav Kinsbursky if (retval) 1507f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1508*ed9ab734SJeff Layton retval = nfsd_net_reply_cache_init(nn); 1509*ed9ab734SJeff Layton if (retval) 1510*ed9ab734SJeff Layton goto out_repcache_error; 1511e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1512e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 1513f385f7d2SDai Ngo nfsd4_init_leases_net(nn); 151491d2e9b5SChuck Lever get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); 151591d2e9b5SChuck Lever seqlock_init(&nn->writeverf_lock); 15162c830dd7SJ. Bruce Fields 15175717e012SStanislav Kinsbursky return 0; 15185717e012SStanislav Kinsbursky 1519*ed9ab734SJeff Layton out_repcache_error: 1520*ed9ab734SJeff Layton nfsd_idmap_shutdown(net); 1521f69adb2fSStanislav Kinsbursky out_idmap_error: 1522f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 15235717e012SStanislav Kinsbursky out_export_error: 15245717e012SStanislav Kinsbursky return retval; 15255717e012SStanislav Kinsbursky } 15265717e012SStanislav Kinsbursky 15275717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 15285717e012SStanislav Kinsbursky { 1529*ed9ab734SJeff Layton struct nfsd_net *nn = net_generic(net, nfsd_net_id); 1530*ed9ab734SJeff Layton 1531*ed9ab734SJeff Layton nfsd_net_reply_cache_destroy(nn); 1532f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 15335717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1534*ed9ab734SJeff Layton nfsd_netns_free_versions(nn); 15355717e012SStanislav Kinsbursky } 15365717e012SStanislav Kinsbursky 15377ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 15385717e012SStanislav Kinsbursky .init = nfsd_init_net, 15395717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 15407ea34ac1SJeff Layton .id = &nfsd_net_id, 15417ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 15427ea34ac1SJeff Layton }; 15437ea34ac1SJeff Layton 15441da177e4SLinus Torvalds static int __init init_nfsd(void) 15451da177e4SLinus Torvalds { 15461da177e4SLinus Torvalds int retval; 15471da177e4SLinus Torvalds 1548bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1549bb7ffbf2SGiuseppe Cantavenera if (retval) 1550b10252c7SAlexander Sverdlin return retval; 15519cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 155265178db4SBryan Schumaker if (retval) 155365178db4SBryan Schumaker goto out_free_slabs; 1554e567b98cSAmir Goldstein retval = nfsd_stat_init(); /* Statistics */ 1555e567b98cSAmir Goldstein if (retval) 1556e567b98cSAmir Goldstein goto out_free_pnfs; 1557027690c7SJ. Bruce Fields retval = nfsd_drc_slab_create(); 1558027690c7SJ. Bruce Fields if (retval) 1559027690c7SJ. Bruce Fields goto out_free_stat; 15601da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1561e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1562e331f606SJ. Bruce Fields if (retval) 1563f69adb2fSStanislav Kinsbursky goto out_free_lockd; 1564bd5ae928SJ. Bruce Fields retval = register_pernet_subsys(&nfsd_net_ops); 1565bd5ae928SJ. Bruce Fields if (retval < 0) 15666f6f84aaSZhang Xiaoxu goto out_free_exports; 1567b10252c7SAlexander Sverdlin retval = register_cld_notifier(); 1568b10252c7SAlexander Sverdlin if (retval) 156962fdb65eSZhang Xiaoxu goto out_free_subsys; 1570d76cc46bSDai Ngo retval = nfsd4_create_laundry_wq(); 1571d76cc46bSDai Ngo if (retval) 15726f6f84aaSZhang Xiaoxu goto out_free_cld; 15736f6f84aaSZhang Xiaoxu retval = register_filesystem(&nfsd_fs_type); 15746f6f84aaSZhang Xiaoxu if (retval) 1575d76cc46bSDai Ngo goto out_free_all; 157626808d3fSJ. Bruce Fields return 0; 157726808d3fSJ. Bruce Fields out_free_all: 15786f6f84aaSZhang Xiaoxu nfsd4_destroy_laundry_wq(); 15796f6f84aaSZhang Xiaoxu out_free_cld: 158062fdb65eSZhang Xiaoxu unregister_cld_notifier(); 158162fdb65eSZhang Xiaoxu out_free_subsys: 1582b10252c7SAlexander Sverdlin unregister_pernet_subsys(&nfsd_net_ops); 1583bd5ae928SJ. Bruce Fields out_free_exports: 15841da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15851da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1586dbf847ecSJ. Bruce Fields out_free_lockd: 15871da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1588027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 1589027690c7SJ. Bruce Fields out_free_stat: 1590d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 1591e567b98cSAmir Goldstein out_free_pnfs: 15929cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 159365178db4SBryan Schumaker out_free_slabs: 159446b25895SJ. Bruce Fields nfsd4_free_slabs(); 15951da177e4SLinus Torvalds return retval; 15961da177e4SLinus Torvalds } 15971da177e4SLinus Torvalds 15981da177e4SLinus Torvalds static void __exit exit_nfsd(void) 15991da177e4SLinus Torvalds { 16006f6f84aaSZhang Xiaoxu unregister_filesystem(&nfsd_fs_type); 1601d76cc46bSDai Ngo nfsd4_destroy_laundry_wq(); 1602b10252c7SAlexander Sverdlin unregister_cld_notifier(); 1603bd5ae928SJ. Bruce Fields unregister_pernet_subsys(&nfsd_net_ops); 1604027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 16051da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 16061da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 16071da177e4SLinus Torvalds nfsd_stat_shutdown(); 16081da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1609e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 16109cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 16111da177e4SLinus Torvalds } 16121da177e4SLinus Torvalds 16131da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 16141da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 16151da177e4SLinus Torvalds module_init(init_nfsd) 16161da177e4SLinus Torvalds module_exit(exit_nfsd) 1617