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" 289a74af21SBoaz Harrosh 291da177e4SLinus Torvalds /* 30b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 311da177e4SLinus Torvalds */ 321da177e4SLinus Torvalds enum { 331da177e4SLinus Torvalds NFSD_Root = 1, 341da177e4SLinus Torvalds NFSD_List, 3520ad856eSAmir Goldstein NFSD_Export_Stats, 36e8e8753fSJ. Bruce Fields NFSD_Export_features, 371da177e4SLinus Torvalds NFSD_Fh, 384373ea84SWendy Cheng NFSD_FO_UnlockIP, 3917efa372SWendy Cheng NFSD_FO_UnlockFS, 401da177e4SLinus Torvalds NFSD_Threads, 41eed2965aSGreg Banks NFSD_Pool_Threads, 4203cf6c9fSGreg Banks NFSD_Pool_Stats, 43a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 4470c3b76cSNeilBrown NFSD_Versions, 4580212d59SNeilBrown NFSD_Ports, 46596bbe53SNeilBrown NFSD_MaxBlkSize, 475b8db00bSJeff Layton NFSD_MaxConnections, 482e6c6e4cSChuck Lever NFSD_Filecache, 4970c3b76cSNeilBrown /* 5070c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 5170c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 5270c3b76cSNeilBrown */ 5370c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 541da177e4SLinus Torvalds NFSD_Leasetime, 55efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 560964a3d3SNeilBrown NFSD_RecoveryDir, 577f5ef2e9SJeff Layton NFSD_V4EndGrace, 5870c3b76cSNeilBrown #endif 59e8a79fb1SJ. Bruce Fields NFSD_MaxReserved 601da177e4SLinus Torvalds }; 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds /* 631da177e4SLinus Torvalds * write() for these nodes. 641da177e4SLinus Torvalds */ 651da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 66b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 67b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 681da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 69eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 7070c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 7180212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 72596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 735b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 7470c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 751da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 76efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 770964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 787f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 7970c3b76cSNeilBrown #endif 801da177e4SLinus Torvalds 81c2cdc2abSEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 821da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 83b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 84b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 851da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 86eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 8770c3b76cSNeilBrown [NFSD_Versions] = write_versions, 8880212d59SNeilBrown [NFSD_Ports] = write_ports, 89596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 905b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 9170c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 921da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 93efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 940964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 957f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 9670c3b76cSNeilBrown #endif 971da177e4SLinus Torvalds }; 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1001da177e4SLinus Torvalds { 101496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 1021da177e4SLinus Torvalds char *data; 1031da177e4SLinus Torvalds ssize_t rv; 1041da177e4SLinus Torvalds 105e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1061da177e4SLinus Torvalds return -EINVAL; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1091da177e4SLinus Torvalds if (IS_ERR(data)) 1101da177e4SLinus Torvalds return PTR_ERR(data); 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1138971a101SNeilBrown if (rv >= 0) { 1141da177e4SLinus Torvalds simple_transaction_set(file, rv); 1151da177e4SLinus Torvalds rv = size; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds return rv; 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 1207390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1217390022dSNeilBrown { 1227390022dSNeilBrown if (! file->private_data) { 1237390022dSNeilBrown /* An attempt to read a transaction file without writing 1247390022dSNeilBrown * causes a 0-byte write so that the file can return 1257390022dSNeilBrown * state information 1267390022dSNeilBrown */ 1277390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1287390022dSNeilBrown if (rv < 0) 1297390022dSNeilBrown return rv; 1307390022dSNeilBrown } 1317390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1327390022dSNeilBrown } 1337390022dSNeilBrown 1344b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1351da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1367390022dSNeilBrown .read = nfsctl_transaction_read, 1371da177e4SLinus Torvalds .release = simple_transaction_release, 1386038f373SArnd Bergmann .llseek = default_llseek, 1391da177e4SLinus Torvalds }; 1401da177e4SLinus Torvalds 14196d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1421da177e4SLinus Torvalds { 143f2c7ea10SStanislav Kinsbursky int err; 144f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 14596d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 146f2c7ea10SStanislav Kinsbursky 147f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 148f2c7ea10SStanislav Kinsbursky if (err) 149f2c7ea10SStanislav Kinsbursky return err; 150f2c7ea10SStanislav Kinsbursky 151f2c7ea10SStanislav Kinsbursky seq = file->private_data; 152e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 153f2c7ea10SStanislav Kinsbursky return 0; 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 15696d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 15796d851c4SStanislav Kinsbursky { 15896d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 15996d851c4SStanislav Kinsbursky } 16096d851c4SStanislav Kinsbursky 16196d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 16296d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1631da177e4SLinus Torvalds .read = seq_read, 1641da177e4SLinus Torvalds .llseek = seq_lseek, 1651da177e4SLinus Torvalds .release = seq_release, 1661da177e4SLinus Torvalds }; 1671da177e4SLinus Torvalds 168e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 169e8e8753fSJ. Bruce Fields { 170e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 171e8e8753fSJ. Bruce Fields return 0; 172e8e8753fSJ. Bruce Fields } 173e8e8753fSJ. Bruce Fields 1749beeaab8SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(export_features); 175e8e8753fSJ. Bruce Fields 176828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 17703cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 17803cf6c9fSGreg Banks .read = seq_read, 17903cf6c9fSGreg Banks .llseek = seq_lseek, 180ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 18103cf6c9fSGreg Banks }; 18203cf6c9fSGreg Banks 18364776611SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); 184a2f999a3SJeff Layton 1851342f9ddSChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats); 1862e6c6e4cSChuck Lever 1871da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 1881da177e4SLinus Torvalds /* 1891da177e4SLinus Torvalds * payload - write methods 1901da177e4SLinus Torvalds */ 1911da177e4SLinus Torvalds 192244c7d44SAl Viro static inline struct net *netns(struct file *file) 193244c7d44SAl Viro { 194244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 195244c7d44SAl Viro } 1961da177e4SLinus Torvalds 197f2453978SChuck Lever /* 198262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 199262a0982SChuck Lever * 200262a0982SChuck Lever * Experimental. 201262a0982SChuck Lever * 202262a0982SChuck Lever * Input: 203262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2044116092bSChuck Lever * presentation format IP address 205262a0982SChuck Lever * size: length of C string in @buf 206262a0982SChuck Lever * Output: 207262a0982SChuck Lever * On success: returns zero if all specified locks were released; 208262a0982SChuck Lever * returns one if one or more locks were not released 209262a0982SChuck Lever * On error: return code is negative errno value 210262a0982SChuck Lever */ 211b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2124373ea84SWendy Cheng { 2134116092bSChuck Lever struct sockaddr_storage address; 2144116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2154116092bSChuck Lever size_t salen = sizeof(address); 216367c8c7bSChuck Lever char *fo_path; 217244c7d44SAl Viro struct net *net = netns(file); 2184373ea84SWendy Cheng 2194373ea84SWendy Cheng /* sanity check */ 2204373ea84SWendy Cheng if (size == 0) 2214373ea84SWendy Cheng return -EINVAL; 2224373ea84SWendy Cheng 2234373ea84SWendy Cheng if (buf[size-1] != '\n') 2244373ea84SWendy Cheng return -EINVAL; 2254373ea84SWendy Cheng 2264373ea84SWendy Cheng fo_path = buf; 2274373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2284373ea84SWendy Cheng return -EINVAL; 2294373ea84SWendy Cheng 23011f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2314373ea84SWendy Cheng return -EINVAL; 2324373ea84SWendy Cheng 2334116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2344373ea84SWendy Cheng } 2354373ea84SWendy Cheng 236f2453978SChuck Lever /* 237262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 238262a0982SChuck Lever * 239262a0982SChuck Lever * Experimental. 240262a0982SChuck Lever * 241262a0982SChuck Lever * Input: 242262a0982SChuck Lever * buf: '\n'-terminated C string containing the 243262a0982SChuck Lever * absolute pathname of a local file system 244262a0982SChuck Lever * size: length of C string in @buf 245262a0982SChuck Lever * Output: 246262a0982SChuck Lever * On success: returns zero if all specified locks were released; 247262a0982SChuck Lever * returns one if one or more locks were not released 248262a0982SChuck Lever * On error: return code is negative errno value 249262a0982SChuck Lever */ 250b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 25117efa372SWendy Cheng { 252a63bb996SAl Viro struct path path; 25317efa372SWendy Cheng char *fo_path; 25417efa372SWendy Cheng int error; 25517efa372SWendy Cheng 25617efa372SWendy Cheng /* sanity check */ 25717efa372SWendy Cheng if (size == 0) 25817efa372SWendy Cheng return -EINVAL; 25917efa372SWendy Cheng 26017efa372SWendy Cheng if (buf[size-1] != '\n') 26117efa372SWendy Cheng return -EINVAL; 26217efa372SWendy Cheng 26317efa372SWendy Cheng fo_path = buf; 26417efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 26517efa372SWendy Cheng return -EINVAL; 26617efa372SWendy Cheng 267a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 26817efa372SWendy Cheng if (error) 26917efa372SWendy Cheng return error; 27017efa372SWendy Cheng 271262a0982SChuck Lever /* 272262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 273262a0982SChuck Lever * releasing locks on the wrong file system. 274262a0982SChuck Lever * 275262a0982SChuck Lever * For example: 276262a0982SChuck Lever * 1. Does the path refer to a directory? 277262a0982SChuck Lever * 2. Is that directory a mount point, or 278262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 279262a0982SChuck Lever */ 280d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 28117efa372SWendy Cheng 282a63bb996SAl Viro path_put(&path); 28317efa372SWendy Cheng return error; 28417efa372SWendy Cheng } 28517efa372SWendy Cheng 286f2453978SChuck Lever /* 287262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 288262a0982SChuck Lever * 289262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 290262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 291262a0982SChuck Lever * contain escape sequences. 292262a0982SChuck Lever * 293262a0982SChuck Lever * Input: 294262a0982SChuck Lever * buf: 295262a0982SChuck Lever * domain: client domain name 296262a0982SChuck Lever * path: export pathname 297262a0982SChuck Lever * maxsize: numeric maximum size of 298262a0982SChuck Lever * @buf 299262a0982SChuck Lever * size: length of C string in @buf 300262a0982SChuck Lever * Output: 301262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 302262a0982SChuck Lever * string containing a ASCII hex text version 303262a0982SChuck Lever * of the NFS file handle; 304262a0982SChuck Lever * return code is the size in bytes of the string 305262a0982SChuck Lever * On error: return code is negative errno value 306262a0982SChuck Lever */ 3071da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3081da177e4SLinus Torvalds { 3091da177e4SLinus Torvalds char *dname, *path; 3103f649ab7SKees Cook int maxsize; 3111da177e4SLinus Torvalds char *mesg = buf; 3121da177e4SLinus Torvalds int len; 3131da177e4SLinus Torvalds struct auth_domain *dom; 3141da177e4SLinus Torvalds struct knfsd_fh fh; 3151da177e4SLinus Torvalds 31687d26ea7SJ. Bruce Fields if (size == 0) 31787d26ea7SJ. Bruce Fields return -EINVAL; 31887d26ea7SJ. Bruce Fields 3191da177e4SLinus Torvalds if (buf[size-1] != '\n') 3201da177e4SLinus Torvalds return -EINVAL; 3211da177e4SLinus Torvalds buf[size-1] = 0; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds dname = mesg; 3241da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 32554224f04SChuck Lever if (len <= 0) 32654224f04SChuck Lever return -EINVAL; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds path = dname+len+1; 3291da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 33054224f04SChuck Lever if (len <= 0) 33154224f04SChuck Lever return -EINVAL; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3341da177e4SLinus Torvalds if (len) 3351da177e4SLinus Torvalds return len; 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3381da177e4SLinus Torvalds return -EINVAL; 3393c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3421da177e4SLinus Torvalds return -EINVAL; 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3451da177e4SLinus Torvalds dom = unix_domain_find(dname); 3461da177e4SLinus Torvalds if (!dom) 3471da177e4SLinus Torvalds return -ENOMEM; 3481da177e4SLinus Torvalds 349244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3501da177e4SLinus Torvalds auth_domain_put(dom); 3511da177e4SLinus Torvalds if (len) 3521da177e4SLinus Torvalds return len; 3531da177e4SLinus Torvalds 35454224f04SChuck Lever mesg = buf; 35554224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 356d8b26071SNeilBrown qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size); 3571da177e4SLinus Torvalds mesg[-1] = '\n'; 3581da177e4SLinus Torvalds return mesg - buf; 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 361f2453978SChuck Lever /* 362262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 363262a0982SChuck Lever * 364262a0982SChuck Lever * Input: 365262a0982SChuck Lever * buf: ignored 366262a0982SChuck Lever * size: zero 367262a0982SChuck Lever * Output: 368262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 369262a0982SChuck Lever * string numeric value representing the number of 370262a0982SChuck Lever * running NFSD threads; 371262a0982SChuck Lever * return code is the size in bytes of the string 372262a0982SChuck Lever * On error: return code is zero 373262a0982SChuck Lever * 374262a0982SChuck Lever * OR 375262a0982SChuck Lever * 376262a0982SChuck Lever * Input: 377262a0982SChuck Lever * buf: C string containing an unsigned 378262a0982SChuck Lever * integer value representing the 379262a0982SChuck Lever * number of NFSD threads to start 380262a0982SChuck Lever * size: non-zero length of C string in @buf 381262a0982SChuck Lever * Output: 382262a0982SChuck Lever * On success: NFS service is started; 383262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 384262a0982SChuck Lever * string numeric value representing the number of 385262a0982SChuck Lever * running NFSD threads; 386262a0982SChuck Lever * return code is the size in bytes of the string 387262a0982SChuck Lever * On error: return code is zero or a negative errno value 388262a0982SChuck Lever */ 3891da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 3901da177e4SLinus Torvalds { 3911da177e4SLinus Torvalds char *mesg = buf; 3921da177e4SLinus Torvalds int rv; 393244c7d44SAl Viro struct net *net = netns(file); 394d41a9417SStanislav Kinsbursky 3951da177e4SLinus Torvalds if (size > 0) { 3961da177e4SLinus Torvalds int newthreads; 3971da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 3981da177e4SLinus Torvalds if (rv) 3991da177e4SLinus Torvalds return rv; 4001da177e4SLinus Torvalds if (newthreads < 0) 4011da177e4SLinus Torvalds return -EINVAL; 4024df493a2STrond Myklebust rv = nfsd_svc(newthreads, net, file->f_cred); 40382e12fe9SNeilBrown if (rv < 0) 4041da177e4SLinus Torvalds return rv; 40582e12fe9SNeilBrown } else 4069dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 407e06b6405SChuck Lever 40882e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds 411f2453978SChuck Lever /* 412262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 413262a0982SChuck Lever * 414262a0982SChuck Lever * Input: 415262a0982SChuck Lever * buf: ignored 416262a0982SChuck Lever * size: zero 417262a0982SChuck Lever * 418262a0982SChuck Lever * OR 419262a0982SChuck Lever * 420262a0982SChuck Lever * Input: 421262a0982SChuck Lever * buf: C string containing whitespace- 422262a0982SChuck Lever * separated unsigned integer values 423262a0982SChuck Lever * representing the number of NFSD 424262a0982SChuck Lever * threads to start in each pool 425262a0982SChuck Lever * size: non-zero length of C string in @buf 426262a0982SChuck Lever * Output: 427262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 428262a0982SChuck Lever * string containing integer values representing the 429262a0982SChuck Lever * number of NFSD threads in each pool; 430262a0982SChuck Lever * return code is the size in bytes of the string 431262a0982SChuck Lever * On error: return code is zero or a negative errno value 432262a0982SChuck Lever */ 433eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 434eed2965aSGreg Banks { 435eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 436eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 437eed2965aSGreg Banks */ 438eed2965aSGreg Banks char *mesg = buf; 439eed2965aSGreg Banks int i; 440eed2965aSGreg Banks int rv; 441eed2965aSGreg Banks int len; 442bedbdd8bSNeil Brown int npools; 443eed2965aSGreg Banks int *nthreads; 444244c7d44SAl Viro struct net *net = netns(file); 445eed2965aSGreg Banks 446bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4479dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 448eed2965aSGreg Banks if (npools == 0) { 449eed2965aSGreg Banks /* 450eed2965aSGreg Banks * NFS is shut down. The admin can start it by 451eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 452eed2965aSGreg Banks * file, sorry. Report zero threads. 453eed2965aSGreg Banks */ 454bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 455eed2965aSGreg Banks strcpy(buf, "0\n"); 456eed2965aSGreg Banks return strlen(buf); 457eed2965aSGreg Banks } 458eed2965aSGreg Banks 459eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 460bedbdd8bSNeil Brown rv = -ENOMEM; 461eed2965aSGreg Banks if (nthreads == NULL) 462bedbdd8bSNeil Brown goto out_free; 463eed2965aSGreg Banks 464eed2965aSGreg Banks if (size > 0) { 465eed2965aSGreg Banks for (i = 0; i < npools; i++) { 466eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 467eed2965aSGreg Banks if (rv == -ENOENT) 468eed2965aSGreg Banks break; /* fewer numbers than pools */ 469eed2965aSGreg Banks if (rv) 470eed2965aSGreg Banks goto out_free; /* syntax error */ 471eed2965aSGreg Banks rv = -EINVAL; 472eed2965aSGreg Banks if (nthreads[i] < 0) 473eed2965aSGreg Banks goto out_free; 474eed2965aSGreg Banks } 4753938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 476eed2965aSGreg Banks if (rv) 477eed2965aSGreg Banks goto out_free; 478eed2965aSGreg Banks } 479eed2965aSGreg Banks 4809dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 481eed2965aSGreg Banks if (rv) 482eed2965aSGreg Banks goto out_free; 483eed2965aSGreg Banks 484eed2965aSGreg Banks mesg = buf; 485eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 486eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 487eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 488eed2965aSGreg Banks len = strlen(mesg); 489eed2965aSGreg Banks size -= len; 490eed2965aSGreg Banks mesg += len; 491eed2965aSGreg Banks } 492413d63d7SJ. Bruce Fields rv = mesg - buf; 493eed2965aSGreg Banks out_free: 494eed2965aSGreg Banks kfree(nthreads); 495bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 496eed2965aSGreg Banks return rv; 497eed2965aSGreg Banks } 498eed2965aSGreg Banks 499ff7d1179STrond Myklebust static ssize_t 500e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 501e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 502ff7d1179STrond Myklebust { 503abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 504e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 505ff7d1179STrond Myklebust 506abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 507e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 508ff7d1179STrond Myklebust supported = false; 509abcb4dacSNeilBrown if (minor == 0 && supported) 510abcb4dacSNeilBrown /* 511abcb4dacSNeilBrown * special case for backward compatability. 512abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 513abcb4dacSNeilBrown * +4, unless -4.0 is present. 514abcb4dacSNeilBrown */ 515abcb4dacSNeilBrown return 0; 516ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 517ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 518ff7d1179STrond Myklebust } 519ff7d1179STrond Myklebust 5203dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 52170c3b76cSNeilBrown { 52270c3b76cSNeilBrown char *mesg = buf; 5238daf220aSBenny Halevy char *vers, *minorp, sign; 524261758b5SChuck Lever int len, num, remaining; 52570c3b76cSNeilBrown ssize_t tlen = 0; 52670c3b76cSNeilBrown char *sep; 527244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 52870c3b76cSNeilBrown 52970c3b76cSNeilBrown if (size>0) { 5309dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5316658d3a7SNeilBrown /* Cannot change versions without updating 5329dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5336658d3a7SNeilBrown * rq_argp and rq_resp 5346658d3a7SNeilBrown */ 53570c3b76cSNeilBrown return -EBUSY; 53670c3b76cSNeilBrown if (buf[size-1] != '\n') 53770c3b76cSNeilBrown return -EINVAL; 53870c3b76cSNeilBrown buf[size-1] = 0; 53970c3b76cSNeilBrown 54070c3b76cSNeilBrown vers = mesg; 54170c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 54270c3b76cSNeilBrown if (len <= 0) return -EINVAL; 54370c3b76cSNeilBrown do { 544d3635ff0STrond Myklebust enum vers_op cmd; 545abcb4dacSNeilBrown unsigned minor; 54670c3b76cSNeilBrown sign = *vers; 54770c3b76cSNeilBrown if (sign == '+' || sign == '-') 5488daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 54970c3b76cSNeilBrown else 5508daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5518daf220aSBenny Halevy if (*minorp == '.') { 552ff89be87SJ. Bruce Fields if (num != 4) 5538daf220aSBenny Halevy return -EINVAL; 554e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5558daf220aSBenny Halevy return -EINVAL; 556abcb4dacSNeilBrown } 557abcb4dacSNeilBrown 558d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 55970c3b76cSNeilBrown switch(num) { 5602f3a4b2aSJeff Layton #ifdef CONFIG_NFSD_V2 56170c3b76cSNeilBrown case 2: 5622f3a4b2aSJeff Layton #endif 56370c3b76cSNeilBrown case 3: 564e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 565d3635ff0STrond Myklebust break; 56670c3b76cSNeilBrown case 4: 567abcb4dacSNeilBrown if (*minorp == '.') { 568e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 569abcb4dacSNeilBrown return -EINVAL; 570e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 571abcb4dacSNeilBrown /* 572abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 573abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 574abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 575abcb4dacSNeilBrown */ 576abcb4dacSNeilBrown minor = 0; 577e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 578abcb4dacSNeilBrown minor++; 579abcb4dacSNeilBrown } 58070c3b76cSNeilBrown break; 58170c3b76cSNeilBrown default: 5828e823bafSJeff Layton /* Ignore requests to disable non-existent versions */ 5838e823bafSJeff Layton if (cmd == NFSD_SET) 58470c3b76cSNeilBrown return -EINVAL; 58570c3b76cSNeilBrown } 58670c3b76cSNeilBrown vers += len + 1; 58770c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 58870c3b76cSNeilBrown /* If all get turned off, turn them back on, as 58970c3b76cSNeilBrown * having no versions is BAD 59070c3b76cSNeilBrown */ 591e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 59270c3b76cSNeilBrown } 593261758b5SChuck Lever 59470c3b76cSNeilBrown /* Now write current state into reply buffer */ 59570c3b76cSNeilBrown sep = ""; 596261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 597ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 598abcb4dacSNeilBrown int minor; 599e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 600e35659f1SNeilBrown continue; 601abcb4dacSNeilBrown 602abcb4dacSNeilBrown minor = -1; 603ff7d1179STrond Myklebust do { 604e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 605ff7d1179STrond Myklebust sep, num, minor); 606818f2f57SDan Carpenter if (len >= remaining) 607ff7d1179STrond Myklebust goto out; 608261758b5SChuck Lever remaining -= len; 609261758b5SChuck Lever buf += len; 610261758b5SChuck Lever tlen += len; 611ff7d1179STrond Myklebust minor++; 612abcb4dacSNeilBrown if (len) 613ff7d1179STrond Myklebust sep = " "; 614ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 615261758b5SChuck Lever } 616ff7d1179STrond Myklebust out: 617261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 618818f2f57SDan Carpenter if (len >= remaining) 619261758b5SChuck Lever return -EINVAL; 620261758b5SChuck Lever return tlen + len; 62170c3b76cSNeilBrown } 62270c3b76cSNeilBrown 623f2453978SChuck Lever /* 624262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 625262a0982SChuck Lever * 626262a0982SChuck Lever * Input: 627262a0982SChuck Lever * buf: ignored 628262a0982SChuck Lever * size: zero 629262a0982SChuck Lever * Output: 630262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 631262a0982SChuck Lever * string containing positive or negative integer 632262a0982SChuck Lever * values representing the current status of each 633262a0982SChuck Lever * protocol version; 634262a0982SChuck Lever * return code is the size in bytes of the string 635262a0982SChuck Lever * On error: return code is zero or a negative errno value 636262a0982SChuck Lever * 637262a0982SChuck Lever * OR 638262a0982SChuck Lever * 639262a0982SChuck Lever * Input: 640262a0982SChuck Lever * buf: C string containing whitespace- 641262a0982SChuck Lever * separated positive or negative 642262a0982SChuck Lever * integer values representing NFS 643262a0982SChuck Lever * protocol versions to enable ("+n") 644262a0982SChuck Lever * or disable ("-n") 645262a0982SChuck Lever * size: non-zero length of C string in @buf 646262a0982SChuck Lever * Output: 647262a0982SChuck Lever * On success: status of zero or more protocol versions has 648262a0982SChuck Lever * been updated; passed-in buffer filled with 649262a0982SChuck Lever * '\n'-terminated C string containing positive 650262a0982SChuck Lever * or negative integer values representing the 651262a0982SChuck Lever * current status of each protocol version; 652262a0982SChuck Lever * return code is the size in bytes of the string 653262a0982SChuck Lever * On error: return code is zero or a negative errno value 654262a0982SChuck Lever */ 6553dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6563dd98a3bSJeff Layton { 6573dd98a3bSJeff Layton ssize_t rv; 6583dd98a3bSJeff Layton 6593dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6603dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6613dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6623dd98a3bSJeff Layton return rv; 6633dd98a3bSJeff Layton } 6643dd98a3bSJeff Layton 6654cd5dc75SChuck Lever /* 6660a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 6670a5372d8SChuck Lever * transports. 6680a5372d8SChuck Lever */ 6699dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 6700a5372d8SChuck Lever { 6719dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6729dd9845fSStanislav Kinsbursky 6739dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 6740a5372d8SChuck Lever return 0; 6759dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 6760a5372d8SChuck Lever } 6770a5372d8SChuck Lever 6780a5372d8SChuck Lever /* 6790b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 6800b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 6810b7c2f6fSChuck Lever * nfsd listener. 6820b7c2f6fSChuck Lever */ 6834df493a2STrond Myklebust static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 6840b7c2f6fSChuck Lever { 6850b7c2f6fSChuck Lever char *mesg = buf; 6860b7c2f6fSChuck Lever int fd, err; 6879dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6880b7c2f6fSChuck Lever 6890b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 6900b7c2f6fSChuck Lever if (err != 0 || fd < 0) 6910b7c2f6fSChuck Lever return -EINVAL; 6920b7c2f6fSChuck Lever 6936777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 6940b7c2f6fSChuck Lever if (err != 0) 6950b7c2f6fSChuck Lever return err; 6960b7c2f6fSChuck Lever 697*c034203bSDan Carpenter err = svc_addsock(nn->nfsd_serv, net, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 698ea068badSChuck Lever 699ec52361dSNeilBrown if (err >= 0 && 700ec52361dSNeilBrown !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 701ec52361dSNeilBrown svc_get(nn->nfsd_serv); 702ec52361dSNeilBrown 703ec52361dSNeilBrown nfsd_put(net); 704ea068badSChuck Lever return err; 7050b7c2f6fSChuck Lever } 7060b7c2f6fSChuck Lever 7070b7c2f6fSChuck Lever /* 7084eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 7094eb68c26SChuck Lever * a port number. 7104eb68c26SChuck Lever */ 7114df493a2STrond Myklebust static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 7124eb68c26SChuck Lever { 7134eb68c26SChuck Lever char transport[16]; 71437498292SChuck Lever struct svc_xprt *xprt; 7154eb68c26SChuck Lever int port, err; 7169dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7174eb68c26SChuck Lever 718a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7194eb68c26SChuck Lever return -EINVAL; 7204eb68c26SChuck Lever 7214be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7224eb68c26SChuck Lever return -EINVAL; 7234eb68c26SChuck Lever 7246777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7254eb68c26SChuck Lever if (err != 0) 7264eb68c26SChuck Lever return err; 7274eb68c26SChuck Lever 728352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7294df493a2STrond Myklebust PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 73068717908SChuck Lever if (err < 0) 73137498292SChuck Lever goto out_err; 73237498292SChuck Lever 733352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7344df493a2STrond Myklebust PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 73537498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 73637498292SChuck Lever goto out_close; 7370cd14a06SJeff Layton 738ec52361dSNeilBrown if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 739ec52361dSNeilBrown svc_get(nn->nfsd_serv); 740ec52361dSNeilBrown 741ec52361dSNeilBrown nfsd_put(net); 7424eb68c26SChuck Lever return 0; 74337498292SChuck Lever out_close: 7449dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 74537498292SChuck Lever if (xprt != NULL) { 7464355d767SChuck Lever svc_xprt_close(xprt); 74737498292SChuck Lever svc_xprt_put(xprt); 74837498292SChuck Lever } 74937498292SChuck Lever out_err: 7508c62d127SNeilBrown nfsd_put(net); 75137498292SChuck Lever return err; 7524eb68c26SChuck Lever } 7534eb68c26SChuck Lever 75408160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 75508160352SStanislav Kinsbursky struct net *net) 75680212d59SNeilBrown { 7570a5372d8SChuck Lever if (size == 0) 7589dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 7590b7c2f6fSChuck Lever 7600b7c2f6fSChuck Lever if (isdigit(buf[0])) 7614df493a2STrond Myklebust return __write_ports_addfd(buf, net, file->f_cred); 76282d56591SChuck Lever 7634eb68c26SChuck Lever if (isalpha(buf[0])) 7644df493a2STrond Myklebust return __write_ports_addxprt(buf, net, file->f_cred); 7654cd5dc75SChuck Lever 766b41b66d6SNeilBrown return -EINVAL; 767b41b66d6SNeilBrown } 76880212d59SNeilBrown 769f2453978SChuck Lever /* 770262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 771262a0982SChuck Lever * 772262a0982SChuck Lever * Input: 773262a0982SChuck Lever * buf: ignored 774262a0982SChuck Lever * size: zero 775262a0982SChuck Lever * Output: 776262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 777262a0982SChuck Lever * string containing a whitespace-separated list of 778262a0982SChuck Lever * named NFSD listeners; 779262a0982SChuck Lever * return code is the size in bytes of the string 780262a0982SChuck Lever * On error: return code is zero or a negative errno value 781262a0982SChuck Lever * 782262a0982SChuck Lever * OR 783262a0982SChuck Lever * 784262a0982SChuck Lever * Input: 785262a0982SChuck Lever * buf: C string containing an unsigned 786262a0982SChuck Lever * integer value representing a bound 787262a0982SChuck Lever * but unconnected socket that is to be 788c71206a7SChuck Lever * used as an NFSD listener; listen(3) 789c71206a7SChuck Lever * must be called for a SOCK_STREAM 790c71206a7SChuck Lever * socket, otherwise it is ignored 791262a0982SChuck Lever * size: non-zero length of C string in @buf 792262a0982SChuck Lever * Output: 793262a0982SChuck Lever * On success: NFS service is started; 794262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 795262a0982SChuck Lever * string containing a unique alphanumeric name of 796262a0982SChuck Lever * the listener; 797262a0982SChuck Lever * return code is the size in bytes of the string 798262a0982SChuck Lever * On error: return code is a negative errno value 799262a0982SChuck Lever * 800262a0982SChuck Lever * OR 801262a0982SChuck Lever * 802262a0982SChuck Lever * Input: 803262a0982SChuck Lever * buf: C string containing a transport 804262a0982SChuck Lever * name and an unsigned integer value 805262a0982SChuck Lever * representing the port to listen on, 806262a0982SChuck Lever * separated by whitespace 807262a0982SChuck Lever * size: non-zero length of C string in @buf 808262a0982SChuck Lever * Output: 809262a0982SChuck Lever * On success: returns zero; NFS service is started 810262a0982SChuck Lever * On error: return code is a negative errno value 811262a0982SChuck Lever */ 812bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 813bedbdd8bSNeil Brown { 814bedbdd8bSNeil Brown ssize_t rv; 8153dd98a3bSJeff Layton 816bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 817244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 818bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 819bedbdd8bSNeil Brown return rv; 820bedbdd8bSNeil Brown } 821bedbdd8bSNeil Brown 822bedbdd8bSNeil Brown 823596bbe53SNeilBrown int nfsd_max_blksize; 824596bbe53SNeilBrown 825f2453978SChuck Lever /* 826262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 827262a0982SChuck Lever * 828262a0982SChuck Lever * Input: 829262a0982SChuck Lever * buf: ignored 830262a0982SChuck Lever * size: zero 831262a0982SChuck Lever * 832262a0982SChuck Lever * OR 833262a0982SChuck Lever * 834262a0982SChuck Lever * Input: 835262a0982SChuck Lever * buf: C string containing an unsigned 836262a0982SChuck Lever * integer value representing the new 837262a0982SChuck Lever * NFS blksize 838262a0982SChuck Lever * size: non-zero length of C string in @buf 839262a0982SChuck Lever * Output: 840262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 841262a0982SChuck Lever * containing numeric value of the current NFS blksize 842262a0982SChuck Lever * setting; 843262a0982SChuck Lever * return code is the size in bytes of the string 844262a0982SChuck Lever * On error: return code is zero or a negative errno value 845262a0982SChuck Lever */ 846596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 847596bbe53SNeilBrown { 848596bbe53SNeilBrown char *mesg = buf; 849244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8509dd9845fSStanislav Kinsbursky 851596bbe53SNeilBrown if (size > 0) { 852596bbe53SNeilBrown int bsize; 853596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 854596bbe53SNeilBrown if (rv) 855596bbe53SNeilBrown return rv; 856596bbe53SNeilBrown /* force bsize into allowed range and 857596bbe53SNeilBrown * required alignment. 858596bbe53SNeilBrown */ 8593c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 8603c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 861596bbe53SNeilBrown bsize &= ~(1024-1); 862bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 8639dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 864bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 865596bbe53SNeilBrown return -EBUSY; 866596bbe53SNeilBrown } 867596bbe53SNeilBrown nfsd_max_blksize = bsize; 868bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 869596bbe53SNeilBrown } 870e06b6405SChuck Lever 871e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 872e06b6405SChuck Lever nfsd_max_blksize); 873596bbe53SNeilBrown } 874596bbe53SNeilBrown 875f2453978SChuck Lever /* 8765b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 8775b8db00bSJeff Layton * 8785b8db00bSJeff Layton * Input: 8795b8db00bSJeff Layton * buf: ignored 8805b8db00bSJeff Layton * size: zero 8815b8db00bSJeff Layton * OR 8825b8db00bSJeff Layton * 8835b8db00bSJeff Layton * Input: 8845b8db00bSJeff Layton * buf: C string containing an unsigned 8855b8db00bSJeff Layton * integer value representing the new 8865b8db00bSJeff Layton * number of max connections 8875b8db00bSJeff Layton * size: non-zero length of C string in @buf 8885b8db00bSJeff Layton * Output: 8895b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 8905b8db00bSJeff Layton * containing numeric value of max_connections setting 8915b8db00bSJeff Layton * for this net namespace; 8925b8db00bSJeff Layton * return code is the size in bytes of the string 8935b8db00bSJeff Layton * On error: return code is zero or a negative errno value 8945b8db00bSJeff Layton */ 8955b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 8965b8db00bSJeff Layton { 8975b8db00bSJeff Layton char *mesg = buf; 898244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8995b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9005b8db00bSJeff Layton 9015b8db00bSJeff Layton if (size > 0) { 9025b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9035b8db00bSJeff Layton 9045b8db00bSJeff Layton if (rv) 9055b8db00bSJeff Layton return rv; 9065b8db00bSJeff Layton nn->max_connections = maxconn; 9075b8db00bSJeff Layton } 9085b8db00bSJeff Layton 9095b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9105b8db00bSJeff Layton } 9115b8db00bSJeff Layton 91270c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9139dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 91420b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 9151da177e4SLinus Torvalds { 9161da177e4SLinus Torvalds char *mesg = buf; 917f0135740SJ. Bruce Fields int rv, i; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds if (size > 0) { 9209dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9213dd98a3bSJeff Layton return -EBUSY; 922f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9231da177e4SLinus Torvalds if (rv) 9241da177e4SLinus Torvalds return rv; 925e7b184f1SJ. Bruce Fields /* 926e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 927e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 928e7b184f1SJ. Bruce Fields * extremes are: 929e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 930e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 931e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 932e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 933e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 934e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 935e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 936e7b184f1SJ. Bruce Fields */ 937f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9381da177e4SLinus Torvalds return -EINVAL; 939f0135740SJ. Bruce Fields *time = i; 9401da177e4SLinus Torvalds } 941e06b6405SChuck Lever 94220b7d86fSArnd Bergmann return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); 943f0135740SJ. Bruce Fields } 944f0135740SJ. Bruce Fields 9459dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 94620b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 947f0135740SJ. Bruce Fields { 948f0135740SJ. Bruce Fields ssize_t rv; 949f0135740SJ. Bruce Fields 950f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9519dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 952f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 953f0135740SJ. Bruce Fields return rv; 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds 956f2453978SChuck Lever /* 957262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 958262a0982SChuck Lever * 959262a0982SChuck Lever * Input: 960262a0982SChuck Lever * buf: ignored 961262a0982SChuck Lever * size: zero 962262a0982SChuck Lever * 963262a0982SChuck Lever * OR 964262a0982SChuck Lever * 965262a0982SChuck Lever * Input: 966262a0982SChuck Lever * buf: C string containing an unsigned 967262a0982SChuck Lever * integer value representing the new 968262a0982SChuck Lever * NFSv4 lease expiry time 969262a0982SChuck Lever * size: non-zero length of C string in @buf 970262a0982SChuck Lever * Output: 971262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 972262a0982SChuck Lever * string containing unsigned integer value of the 973262a0982SChuck Lever * current lease expiry time; 974262a0982SChuck Lever * return code is the size in bytes of the string 975262a0982SChuck Lever * On error: return code is zero or a negative errno value 976262a0982SChuck Lever */ 9773dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 9783dd98a3bSJeff Layton { 979244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9809dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 9813dd98a3bSJeff Layton } 9823dd98a3bSJeff Layton 983f2453978SChuck Lever /* 984efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 985efc4bb4fSJ. Bruce Fields * 986efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 987efc4bb4fSJ. Bruce Fields * 988efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 989efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 990efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 991efc4bb4fSJ. Bruce Fields * anyway.) 992efc4bb4fSJ. Bruce Fields */ 993efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 994efc4bb4fSJ. Bruce Fields { 995244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9969dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 997efc4bb4fSJ. Bruce Fields } 998efc4bb4fSJ. Bruce Fields 9999dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10009dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10010964a3d3SNeilBrown { 10020964a3d3SNeilBrown char *mesg = buf; 10030964a3d3SNeilBrown char *recdir; 10040964a3d3SNeilBrown int len, status; 10050964a3d3SNeilBrown 10063dd98a3bSJeff Layton if (size > 0) { 10079dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10083dd98a3bSJeff Layton return -EBUSY; 10093dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10100964a3d3SNeilBrown return -EINVAL; 10110964a3d3SNeilBrown buf[size-1] = 0; 10120964a3d3SNeilBrown 10130964a3d3SNeilBrown recdir = mesg; 10140964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10150964a3d3SNeilBrown if (len <= 0) 10160964a3d3SNeilBrown return -EINVAL; 10170964a3d3SNeilBrown 10180964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 101969049961SAndi Kleen if (status) 102069049961SAndi Kleen return status; 10213dd98a3bSJeff Layton } 10223d72ab8fSChuck Lever 10233d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10243d72ab8fSChuck Lever nfs4_recoverydir()); 10250964a3d3SNeilBrown } 10263dd98a3bSJeff Layton 1027f2453978SChuck Lever /* 1028262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1029262a0982SChuck Lever * 1030262a0982SChuck Lever * Input: 1031262a0982SChuck Lever * buf: ignored 1032262a0982SChuck Lever * size: zero 1033262a0982SChuck Lever * 1034262a0982SChuck Lever * OR 1035262a0982SChuck Lever * 1036262a0982SChuck Lever * Input: 1037262a0982SChuck Lever * buf: C string containing the pathname 1038262a0982SChuck Lever * of the directory on a local file 1039262a0982SChuck Lever * system containing permanent NFSv4 1040262a0982SChuck Lever * recovery data 1041262a0982SChuck Lever * size: non-zero length of C string in @buf 1042262a0982SChuck Lever * Output: 1043262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1044262a0982SChuck Lever * containing the current recovery pathname setting; 1045262a0982SChuck Lever * return code is the size in bytes of the string 1046262a0982SChuck Lever * On error: return code is zero or a negative errno value 1047262a0982SChuck Lever */ 10483dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10493dd98a3bSJeff Layton { 10503dd98a3bSJeff Layton ssize_t rv; 1051244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10523dd98a3bSJeff Layton 10533dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10549dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10553dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10563dd98a3bSJeff Layton return rv; 10573dd98a3bSJeff Layton } 10583dd98a3bSJeff Layton 1059f2453978SChuck Lever /* 10607f5ef2e9SJeff Layton * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 10617f5ef2e9SJeff Layton * 10627f5ef2e9SJeff Layton * Input: 10637f5ef2e9SJeff Layton * buf: ignored 10647f5ef2e9SJeff Layton * size: zero 10657f5ef2e9SJeff Layton * OR 10667f5ef2e9SJeff Layton * 10677f5ef2e9SJeff Layton * Input: 10687f5ef2e9SJeff Layton * buf: any value 10697f5ef2e9SJeff Layton * size: non-zero length of C string in @buf 10707f5ef2e9SJeff Layton * Output: 10717f5ef2e9SJeff Layton * passed-in buffer filled with "Y" or "N" with a newline 10727f5ef2e9SJeff Layton * and NULL-terminated C string. This indicates whether 10737f5ef2e9SJeff Layton * the grace period has ended in the current net 10747f5ef2e9SJeff Layton * namespace. Return code is the size in bytes of the 10757f5ef2e9SJeff Layton * string. Writing a string that starts with 'Y', 'y', or 10767f5ef2e9SJeff Layton * '1' to the file will end the grace period for nfsd's v4 10777f5ef2e9SJeff Layton * lock manager. 10787f5ef2e9SJeff Layton */ 10797f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 10807f5ef2e9SJeff Layton { 1081244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10827f5ef2e9SJeff Layton 10837f5ef2e9SJeff Layton if (size > 0) { 10847f5ef2e9SJeff Layton switch(buf[0]) { 10857f5ef2e9SJeff Layton case 'Y': 10867f5ef2e9SJeff Layton case 'y': 10877f5ef2e9SJeff Layton case '1': 1088dd838821SYihao Wu if (!nn->nfsd_serv) 108962a063b8SJ. Bruce Fields return -EBUSY; 10907f5ef2e9SJeff Layton nfsd4_end_grace(nn); 10917f5ef2e9SJeff Layton break; 10927f5ef2e9SJeff Layton default: 10937f5ef2e9SJeff Layton return -EINVAL; 10947f5ef2e9SJeff Layton } 10957f5ef2e9SJeff Layton } 10967f5ef2e9SJeff Layton 10977f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 10987f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 10997f5ef2e9SJeff Layton } 11007f5ef2e9SJeff Layton 110170c3b76cSNeilBrown #endif 11020964a3d3SNeilBrown 11031da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11041da177e4SLinus Torvalds /* 11051da177e4SLinus Torvalds * populating the filesystem. 11061da177e4SLinus Torvalds */ 11071da177e4SLinus Torvalds 1108e8a79fb1SJ. Bruce Fields /* Basically copying rpc_get_inode. */ 1109e8a79fb1SJ. Bruce Fields static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) 1110e8a79fb1SJ. Bruce Fields { 1111e8a79fb1SJ. Bruce Fields struct inode *inode = new_inode(sb); 1112e8a79fb1SJ. Bruce Fields if (!inode) 1113e8a79fb1SJ. Bruce Fields return NULL; 1114e8a79fb1SJ. Bruce Fields /* Following advice from simple_fill_super documentation: */ 1115e8a79fb1SJ. Bruce Fields inode->i_ino = iunique(sb, NFSD_MaxReserved); 1116e8a79fb1SJ. Bruce Fields inode->i_mode = mode; 1117e8a79fb1SJ. Bruce Fields inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 1118e8a79fb1SJ. Bruce Fields switch (mode & S_IFMT) { 1119e8a79fb1SJ. Bruce Fields case S_IFDIR: 1120e8a79fb1SJ. Bruce Fields inode->i_fop = &simple_dir_operations; 1121e8a79fb1SJ. Bruce Fields inode->i_op = &simple_dir_inode_operations; 1122e8a79fb1SJ. Bruce Fields inc_nlink(inode); 112376c50eb7SGustavo A. R. Silva break; 11244df750c9SChuck Lever case S_IFLNK: 11254df750c9SChuck Lever inode->i_op = &simple_symlink_inode_operations; 11264df750c9SChuck Lever break; 1127e8a79fb1SJ. Bruce Fields default: 1128e8a79fb1SJ. Bruce Fields break; 1129e8a79fb1SJ. Bruce Fields } 1130e8a79fb1SJ. Bruce Fields return inode; 1131e8a79fb1SJ. Bruce Fields } 1132e8a79fb1SJ. Bruce Fields 1133bebd6997SJ. Bruce Fields static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) 1134e8a79fb1SJ. Bruce Fields { 1135e8a79fb1SJ. Bruce Fields struct inode *inode; 1136e8a79fb1SJ. Bruce Fields 1137e8a79fb1SJ. Bruce Fields inode = nfsd_get_inode(dir->i_sb, mode); 1138e8a79fb1SJ. Bruce Fields if (!inode) 1139e8a79fb1SJ. Bruce Fields return -ENOMEM; 1140bebd6997SJ. Bruce Fields if (ncl) { 1141bebd6997SJ. Bruce Fields inode->i_private = ncl; 1142bebd6997SJ. Bruce Fields kref_get(&ncl->cl_ref); 1143bebd6997SJ. Bruce Fields } 1144e8a79fb1SJ. Bruce Fields d_add(dentry, inode); 1145e8a79fb1SJ. Bruce Fields inc_nlink(dir); 1146e8a79fb1SJ. Bruce Fields fsnotify_mkdir(dir, dentry); 1147e8a79fb1SJ. Bruce Fields return 0; 1148e8a79fb1SJ. Bruce Fields } 1149e8a79fb1SJ. Bruce Fields 1150e8a79fb1SJ. Bruce Fields static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) 1151e8a79fb1SJ. Bruce Fields { 1152e8a79fb1SJ. Bruce Fields struct inode *dir = parent->d_inode; 1153e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1154e8a79fb1SJ. Bruce Fields int ret = -ENOMEM; 1155e8a79fb1SJ. Bruce Fields 1156e8a79fb1SJ. Bruce Fields inode_lock(dir); 1157e8a79fb1SJ. Bruce Fields dentry = d_alloc_name(parent, name); 1158e8a79fb1SJ. Bruce Fields if (!dentry) 1159e8a79fb1SJ. Bruce Fields goto out_err; 1160bebd6997SJ. Bruce Fields ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); 1161e8a79fb1SJ. Bruce Fields if (ret) 1162e8a79fb1SJ. Bruce Fields goto out_err; 1163e8a79fb1SJ. Bruce Fields out: 1164e8a79fb1SJ. Bruce Fields inode_unlock(dir); 1165e8a79fb1SJ. Bruce Fields return dentry; 1166e8a79fb1SJ. Bruce Fields out_err: 1167d6846bfbSTetsuo Handa dput(dentry); 1168e8a79fb1SJ. Bruce Fields dentry = ERR_PTR(ret); 1169e8a79fb1SJ. Bruce Fields goto out; 1170e8a79fb1SJ. Bruce Fields } 1171e8a79fb1SJ. Bruce Fields 11724df750c9SChuck Lever #if IS_ENABLED(CONFIG_SUNRPC_GSS) 11734df750c9SChuck Lever static int __nfsd_symlink(struct inode *dir, struct dentry *dentry, 11744df750c9SChuck Lever umode_t mode, const char *content) 11754df750c9SChuck Lever { 11764df750c9SChuck Lever struct inode *inode; 11774df750c9SChuck Lever 11784df750c9SChuck Lever inode = nfsd_get_inode(dir->i_sb, mode); 11794df750c9SChuck Lever if (!inode) 11804df750c9SChuck Lever return -ENOMEM; 11814df750c9SChuck Lever 11824df750c9SChuck Lever inode->i_link = (char *)content; 11834df750c9SChuck Lever inode->i_size = strlen(content); 11844df750c9SChuck Lever 11854df750c9SChuck Lever d_add(dentry, inode); 11864df750c9SChuck Lever inc_nlink(dir); 11874df750c9SChuck Lever fsnotify_create(dir, dentry); 11884df750c9SChuck Lever return 0; 11894df750c9SChuck Lever } 11904df750c9SChuck Lever 11914df750c9SChuck Lever /* 11924df750c9SChuck Lever * @content is assumed to be a NUL-terminated string that lives 11934df750c9SChuck Lever * longer than the symlink itself. 11944df750c9SChuck Lever */ 11954df750c9SChuck Lever static void nfsd_symlink(struct dentry *parent, const char *name, 11964df750c9SChuck Lever const char *content) 11974df750c9SChuck Lever { 11984df750c9SChuck Lever struct inode *dir = parent->d_inode; 11994df750c9SChuck Lever struct dentry *dentry; 12004b471a8bSChuck Lever int ret; 12014df750c9SChuck Lever 12024df750c9SChuck Lever inode_lock(dir); 12034df750c9SChuck Lever dentry = d_alloc_name(parent, name); 12044df750c9SChuck Lever if (!dentry) 12054b471a8bSChuck Lever goto out; 12064df750c9SChuck Lever ret = __nfsd_symlink(d_inode(parent), dentry, S_IFLNK | 0777, content); 12074df750c9SChuck Lever if (ret) 12084b471a8bSChuck Lever dput(dentry); 12094df750c9SChuck Lever out: 12104df750c9SChuck Lever inode_unlock(dir); 12114df750c9SChuck Lever } 12124df750c9SChuck Lever #else 12134df750c9SChuck Lever static inline void nfsd_symlink(struct dentry *parent, const char *name, 12144df750c9SChuck Lever const char *content) 12154df750c9SChuck Lever { 12164df750c9SChuck Lever } 12174df750c9SChuck Lever 12184df750c9SChuck Lever #endif 12194df750c9SChuck Lever 122097ad4031SJ. Bruce Fields static void clear_ncl(struct inode *inode) 1221e8a79fb1SJ. Bruce Fields { 122297ad4031SJ. Bruce Fields struct nfsdfs_client *ncl = inode->i_private; 122397ad4031SJ. Bruce Fields 122497ad4031SJ. Bruce Fields inode->i_private = NULL; 122597ad4031SJ. Bruce Fields kref_put(&ncl->cl_ref, ncl->cl_release); 122697ad4031SJ. Bruce Fields } 122797ad4031SJ. Bruce Fields 1228b78fa45dSYueHaibing static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) 122997ad4031SJ. Bruce Fields { 123097ad4031SJ. Bruce Fields struct nfsdfs_client *nc = inode->i_private; 123197ad4031SJ. Bruce Fields 123297ad4031SJ. Bruce Fields if (nc) 123397ad4031SJ. Bruce Fields kref_get(&nc->cl_ref); 123497ad4031SJ. Bruce Fields return nc; 123597ad4031SJ. Bruce Fields } 123697ad4031SJ. Bruce Fields 123797ad4031SJ. Bruce Fields struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) 123897ad4031SJ. Bruce Fields { 123997ad4031SJ. Bruce Fields struct nfsdfs_client *nc; 124097ad4031SJ. Bruce Fields 1241dc46bba7SJ. Bruce Fields inode_lock_shared(inode); 124297ad4031SJ. Bruce Fields nc = __get_nfsdfs_client(inode); 1243dc46bba7SJ. Bruce Fields inode_unlock_shared(inode); 124497ad4031SJ. Bruce Fields return nc; 124597ad4031SJ. Bruce Fields } 124697ad4031SJ. Bruce Fields /* from __rpc_unlink */ 124797ad4031SJ. Bruce Fields static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) 124897ad4031SJ. Bruce Fields { 124997ad4031SJ. Bruce Fields int ret; 125097ad4031SJ. Bruce Fields 125197ad4031SJ. Bruce Fields clear_ncl(d_inode(dentry)); 125297ad4031SJ. Bruce Fields dget(dentry); 125397ad4031SJ. Bruce Fields ret = simple_unlink(dir, dentry); 125429044daeSAmir Goldstein d_drop(dentry); 125529044daeSAmir Goldstein fsnotify_unlink(dir, dentry); 125697ad4031SJ. Bruce Fields dput(dentry); 125797ad4031SJ. Bruce Fields WARN_ON_ONCE(ret); 125897ad4031SJ. Bruce Fields } 125997ad4031SJ. Bruce Fields 126097ad4031SJ. Bruce Fields static void nfsdfs_remove_files(struct dentry *root) 126197ad4031SJ. Bruce Fields { 126297ad4031SJ. Bruce Fields struct dentry *dentry, *tmp; 126397ad4031SJ. Bruce Fields 126497ad4031SJ. Bruce Fields list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { 126597ad4031SJ. Bruce Fields if (!simple_positive(dentry)) { 126697ad4031SJ. Bruce Fields WARN_ON_ONCE(1); /* I think this can't happen? */ 126797ad4031SJ. Bruce Fields continue; 126897ad4031SJ. Bruce Fields } 126997ad4031SJ. Bruce Fields nfsdfs_remove_file(d_inode(root), dentry); 127097ad4031SJ. Bruce Fields } 127197ad4031SJ. Bruce Fields } 127297ad4031SJ. Bruce Fields 127397ad4031SJ. Bruce Fields /* XXX: cut'n'paste from simple_fill_super; figure out if we could share 127497ad4031SJ. Bruce Fields * code instead. */ 127597ad4031SJ. Bruce Fields static int nfsdfs_create_files(struct dentry *root, 1276472d155aSNeilBrown const struct tree_descr *files, 1277472d155aSNeilBrown struct dentry **fdentries) 127897ad4031SJ. Bruce Fields { 127997ad4031SJ. Bruce Fields struct inode *dir = d_inode(root); 128097ad4031SJ. Bruce Fields struct inode *inode; 128197ad4031SJ. Bruce Fields struct dentry *dentry; 128297ad4031SJ. Bruce Fields int i; 128397ad4031SJ. Bruce Fields 128497ad4031SJ. Bruce Fields inode_lock(dir); 128597ad4031SJ. Bruce Fields for (i = 0; files->name && files->name[0]; i++, files++) { 128697ad4031SJ. Bruce Fields dentry = d_alloc_name(root, files->name); 128797ad4031SJ. Bruce Fields if (!dentry) 128897ad4031SJ. Bruce Fields goto out; 128997ad4031SJ. Bruce Fields inode = nfsd_get_inode(d_inode(root)->i_sb, 129097ad4031SJ. Bruce Fields S_IFREG | files->mode); 129197ad4031SJ. Bruce Fields if (!inode) { 129297ad4031SJ. Bruce Fields dput(dentry); 129397ad4031SJ. Bruce Fields goto out; 129497ad4031SJ. Bruce Fields } 129597ad4031SJ. Bruce Fields inode->i_fop = files->ops; 129697ad4031SJ. Bruce Fields inode->i_private = __get_nfsdfs_client(dir); 129797ad4031SJ. Bruce Fields d_add(dentry, inode); 129897ad4031SJ. Bruce Fields fsnotify_create(dir, dentry); 1299472d155aSNeilBrown if (fdentries) 1300472d155aSNeilBrown fdentries[i] = dentry; 130197ad4031SJ. Bruce Fields } 130297ad4031SJ. Bruce Fields inode_unlock(dir); 130397ad4031SJ. Bruce Fields return 0; 130497ad4031SJ. Bruce Fields out: 130597ad4031SJ. Bruce Fields nfsdfs_remove_files(root); 130697ad4031SJ. Bruce Fields inode_unlock(dir); 130797ad4031SJ. Bruce Fields return -ENOMEM; 130897ad4031SJ. Bruce Fields } 130997ad4031SJ. Bruce Fields 131097ad4031SJ. Bruce Fields /* on success, returns positive number unique to that client. */ 131197ad4031SJ. Bruce Fields struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 131297ad4031SJ. Bruce Fields struct nfsdfs_client *ncl, u32 id, 1313472d155aSNeilBrown const struct tree_descr *files, 1314472d155aSNeilBrown struct dentry **fdentries) 131597ad4031SJ. Bruce Fields { 131697ad4031SJ. Bruce Fields struct dentry *dentry; 1317e8a79fb1SJ. Bruce Fields char name[11]; 131897ad4031SJ. Bruce Fields int ret; 1319e8a79fb1SJ. Bruce Fields 1320bf5ed3e3SJ. Bruce Fields sprintf(name, "%u", id); 1321e8a79fb1SJ. Bruce Fields 132297ad4031SJ. Bruce Fields dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); 132397ad4031SJ. Bruce Fields if (IS_ERR(dentry)) /* XXX: tossing errors? */ 132497ad4031SJ. Bruce Fields return NULL; 1325472d155aSNeilBrown ret = nfsdfs_create_files(dentry, files, fdentries); 132697ad4031SJ. Bruce Fields if (ret) { 132797ad4031SJ. Bruce Fields nfsd_client_rmdir(dentry); 132897ad4031SJ. Bruce Fields return NULL; 132997ad4031SJ. Bruce Fields } 133097ad4031SJ. Bruce Fields return dentry; 1331e8a79fb1SJ. Bruce Fields } 1332e8a79fb1SJ. Bruce Fields 1333e8a79fb1SJ. Bruce Fields /* Taken from __rpc_rmdir: */ 1334e8a79fb1SJ. Bruce Fields void nfsd_client_rmdir(struct dentry *dentry) 1335e8a79fb1SJ. Bruce Fields { 1336e8a79fb1SJ. Bruce Fields struct inode *dir = d_inode(dentry->d_parent); 1337e8a79fb1SJ. Bruce Fields struct inode *inode = d_inode(dentry); 1338e8a79fb1SJ. Bruce Fields int ret; 1339e8a79fb1SJ. Bruce Fields 134097ad4031SJ. Bruce Fields inode_lock(dir); 134197ad4031SJ. Bruce Fields nfsdfs_remove_files(dentry); 134297ad4031SJ. Bruce Fields clear_ncl(inode); 1343e8a79fb1SJ. Bruce Fields dget(dentry); 1344e8a79fb1SJ. Bruce Fields ret = simple_rmdir(dir, dentry); 1345e8a79fb1SJ. Bruce Fields WARN_ON_ONCE(ret); 134629044daeSAmir Goldstein d_drop(dentry); 134769afd267SJ. Bruce Fields fsnotify_rmdir(dir, dentry); 1348bf265401SJ. Bruce Fields dput(dentry); 134997ad4031SJ. Bruce Fields inode_unlock(dir); 1350e8a79fb1SJ. Bruce Fields } 1351e8a79fb1SJ. Bruce Fields 135296a374a3SDavid Howells static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) 13531da177e4SLinus Torvalds { 1354e8a79fb1SJ. Bruce Fields struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 1355e8a79fb1SJ. Bruce Fields nfsd_net_id); 1356e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1357e8a79fb1SJ. Bruce Fields int ret; 1358e8a79fb1SJ. Bruce Fields 1359cda37124SEric Biggers static const struct tree_descr nfsd_files[] = { 136096d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 136120ad856eSAmir Goldstein /* Per-export io stats use same ops as exports file */ 136220ad856eSAmir Goldstein [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO}, 1363e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 13649beeaab8SChenXiaoSong &export_features_fops, S_IRUGO}, 13654373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13664373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 136717efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 136817efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13691da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13701da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1371eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 137203cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 137364776611SChenXiaoSong [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", 137464776611SChenXiaoSong &nfsd_reply_cache_stats_fops, S_IRUGO}, 137570c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 137680212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1377596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13785b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 13791342f9ddSChenXiaoSong [NFSD_Filecache] = {"filecache", &nfsd_file_cache_stats_fops, S_IRUGO}, 13801da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13811da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1382efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 13830964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 13847f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 13851da177e4SLinus Torvalds #endif 13861da177e4SLinus Torvalds /* last one */ {""} 13871da177e4SLinus Torvalds }; 138896a374a3SDavid Howells 1389e8a79fb1SJ. Bruce Fields ret = simple_fill_super(sb, 0x6e667364, nfsd_files); 1390e8a79fb1SJ. Bruce Fields if (ret) 1391e8a79fb1SJ. Bruce Fields return ret; 13924df750c9SChuck Lever nfsd_symlink(sb->s_root, "supported_krb5_enctypes", 13934df750c9SChuck Lever "/proc/net/rpc/gss_krb5_enctypes"); 1394e8a79fb1SJ. Bruce Fields dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); 1395e8a79fb1SJ. Bruce Fields if (IS_ERR(dentry)) 1396e8a79fb1SJ. Bruce Fields return PTR_ERR(dentry); 1397e8a79fb1SJ. Bruce Fields nn->nfsd_client_dir = dentry; 1398e8a79fb1SJ. Bruce Fields return 0; 13991da177e4SLinus Torvalds } 14001da177e4SLinus Torvalds 140196a374a3SDavid Howells static int nfsd_fs_get_tree(struct fs_context *fc) 14021da177e4SLinus Torvalds { 1403533770ccSAl Viro return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); 140496a374a3SDavid Howells } 140596a374a3SDavid Howells 140696a374a3SDavid Howells static void nfsd_fs_free_fc(struct fs_context *fc) 140796a374a3SDavid Howells { 140896a374a3SDavid Howells if (fc->s_fs_info) 140996a374a3SDavid Howells put_net(fc->s_fs_info); 141096a374a3SDavid Howells } 141196a374a3SDavid Howells 141296a374a3SDavid Howells static const struct fs_context_operations nfsd_fs_context_ops = { 141396a374a3SDavid Howells .free = nfsd_fs_free_fc, 141496a374a3SDavid Howells .get_tree = nfsd_fs_get_tree, 141596a374a3SDavid Howells }; 141696a374a3SDavid Howells 141796a374a3SDavid Howells static int nfsd_init_fs_context(struct fs_context *fc) 141896a374a3SDavid Howells { 141996a374a3SDavid Howells put_user_ns(fc->user_ns); 142096a374a3SDavid Howells fc->user_ns = get_user_ns(fc->net_ns->user_ns); 142196a374a3SDavid Howells fc->ops = &nfsd_fs_context_ops; 142296a374a3SDavid Howells return 0; 142311f77942SStanislav Kinsbursky } 142411f77942SStanislav Kinsbursky 142511f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 142611f77942SStanislav Kinsbursky { 142711f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 142811f77942SStanislav Kinsbursky 1429c6c7f2a8STrond Myklebust nfsd_shutdown_threads(net); 1430c6c7f2a8STrond Myklebust 143111f77942SStanislav Kinsbursky kill_litter_super(sb); 143211f77942SStanislav Kinsbursky put_net(net); 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 14361da177e4SLinus Torvalds .owner = THIS_MODULE, 14371da177e4SLinus Torvalds .name = "nfsd", 143896a374a3SDavid Howells .init_fs_context = nfsd_init_fs_context, 143911f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 14401da177e4SLinus Torvalds }; 14417f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 14421da177e4SLinus Torvalds 1443e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1444340086daSTom Rix 1445340086daSTom Rix static int exports_proc_open(struct inode *inode, struct file *file) 1446340086daSTom Rix { 1447340086daSTom Rix return exports_net_open(current->nsproxy->net_ns, file); 1448340086daSTom Rix } 1449340086daSTom Rix 1450340086daSTom Rix static const struct proc_ops exports_proc_ops = { 1451340086daSTom Rix .proc_open = exports_proc_open, 1452340086daSTom Rix .proc_read = seq_read, 1453340086daSTom Rix .proc_lseek = seq_lseek, 1454340086daSTom Rix .proc_release = seq_release, 1455340086daSTom Rix }; 1456340086daSTom Rix 1457e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1458e331f606SJ. Bruce Fields { 1459e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1460e331f606SJ. Bruce Fields 1461e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1462e331f606SJ. Bruce Fields if (!entry) 1463e331f606SJ. Bruce Fields return -ENOMEM; 146497a32539SAlexey Dobriyan entry = proc_create("exports", 0, entry, &exports_proc_ops); 1465ff7c4b36Sfanchaoting if (!entry) { 1466ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1467e331f606SJ. Bruce Fields return -ENOMEM; 1468ff7c4b36Sfanchaoting } 1469e331f606SJ. Bruce Fields return 0; 1470e331f606SJ. Bruce Fields } 1471e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1472e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1473e331f606SJ. Bruce Fields { 1474e331f606SJ. Bruce Fields return 0; 1475e331f606SJ. Bruce Fields } 1476e331f606SJ. Bruce Fields #endif 1477e331f606SJ. Bruce Fields 1478c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 14795717e012SStanislav Kinsbursky 14805717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 14815717e012SStanislav Kinsbursky { 14825717e012SStanislav Kinsbursky int retval; 14833d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 14845717e012SStanislav Kinsbursky 14855717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 14865717e012SStanislav Kinsbursky if (retval) 14875717e012SStanislav Kinsbursky goto out_export_error; 1488f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1489f69adb2fSStanislav Kinsbursky if (retval) 1490f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1491e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1492e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 1493f385f7d2SDai Ngo nfsd4_init_leases_net(nn); 149491d2e9b5SChuck Lever get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); 149591d2e9b5SChuck Lever seqlock_init(&nn->writeverf_lock); 14962c830dd7SJ. Bruce Fields 14975717e012SStanislav Kinsbursky return 0; 14985717e012SStanislav Kinsbursky 1499f69adb2fSStanislav Kinsbursky out_idmap_error: 1500f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 15015717e012SStanislav Kinsbursky out_export_error: 15025717e012SStanislav Kinsbursky return retval; 15035717e012SStanislav Kinsbursky } 15045717e012SStanislav Kinsbursky 15055717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 15065717e012SStanislav Kinsbursky { 1507f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 15085717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1509e333f3bbSTrond Myklebust nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); 15105717e012SStanislav Kinsbursky } 15115717e012SStanislav Kinsbursky 15127ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 15135717e012SStanislav Kinsbursky .init = nfsd_init_net, 15145717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 15157ea34ac1SJeff Layton .id = &nfsd_net_id, 15167ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 15177ea34ac1SJeff Layton }; 15187ea34ac1SJeff Layton 15191da177e4SLinus Torvalds static int __init init_nfsd(void) 15201da177e4SLinus Torvalds { 15211da177e4SLinus Torvalds int retval; 15221da177e4SLinus Torvalds 1523bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1524bb7ffbf2SGiuseppe Cantavenera if (retval) 1525b10252c7SAlexander Sverdlin return retval; 15269cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 152765178db4SBryan Schumaker if (retval) 152865178db4SBryan Schumaker goto out_free_slabs; 1529e567b98cSAmir Goldstein retval = nfsd_stat_init(); /* Statistics */ 1530e567b98cSAmir Goldstein if (retval) 1531e567b98cSAmir Goldstein goto out_free_pnfs; 1532027690c7SJ. Bruce Fields retval = nfsd_drc_slab_create(); 1533027690c7SJ. Bruce Fields if (retval) 1534027690c7SJ. Bruce Fields goto out_free_stat; 15351da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1536e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1537e331f606SJ. Bruce Fields if (retval) 1538f69adb2fSStanislav Kinsbursky goto out_free_lockd; 1539bd5ae928SJ. Bruce Fields retval = register_pernet_subsys(&nfsd_net_ops); 1540bd5ae928SJ. Bruce Fields if (retval < 0) 15416f6f84aaSZhang Xiaoxu goto out_free_exports; 1542b10252c7SAlexander Sverdlin retval = register_cld_notifier(); 1543b10252c7SAlexander Sverdlin if (retval) 154462fdb65eSZhang Xiaoxu goto out_free_subsys; 1545d76cc46bSDai Ngo retval = nfsd4_create_laundry_wq(); 1546d76cc46bSDai Ngo if (retval) 15476f6f84aaSZhang Xiaoxu goto out_free_cld; 15486f6f84aaSZhang Xiaoxu retval = register_filesystem(&nfsd_fs_type); 15496f6f84aaSZhang Xiaoxu if (retval) 1550d76cc46bSDai Ngo goto out_free_all; 155126808d3fSJ. Bruce Fields return 0; 155226808d3fSJ. Bruce Fields out_free_all: 15536f6f84aaSZhang Xiaoxu nfsd4_destroy_laundry_wq(); 15546f6f84aaSZhang Xiaoxu out_free_cld: 155562fdb65eSZhang Xiaoxu unregister_cld_notifier(); 155662fdb65eSZhang Xiaoxu out_free_subsys: 1557b10252c7SAlexander Sverdlin unregister_pernet_subsys(&nfsd_net_ops); 1558bd5ae928SJ. Bruce Fields out_free_exports: 15591da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15601da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1561dbf847ecSJ. Bruce Fields out_free_lockd: 15621da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1563027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 1564027690c7SJ. Bruce Fields out_free_stat: 1565d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 1566e567b98cSAmir Goldstein out_free_pnfs: 15679cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 156865178db4SBryan Schumaker out_free_slabs: 156946b25895SJ. Bruce Fields nfsd4_free_slabs(); 15701da177e4SLinus Torvalds return retval; 15711da177e4SLinus Torvalds } 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds static void __exit exit_nfsd(void) 15741da177e4SLinus Torvalds { 15756f6f84aaSZhang Xiaoxu unregister_filesystem(&nfsd_fs_type); 1576d76cc46bSDai Ngo nfsd4_destroy_laundry_wq(); 1577b10252c7SAlexander Sverdlin unregister_cld_notifier(); 1578bd5ae928SJ. Bruce Fields unregister_pernet_subsys(&nfsd_net_ops); 1579027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 15801da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15811da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 15821da177e4SLinus Torvalds nfsd_stat_shutdown(); 15831da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1584e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 15859cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 15861da177e4SLinus Torvalds } 15871da177e4SLinus Torvalds 15881da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 15891da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 15901da177e4SLinus Torvalds module_init(init_nfsd) 15911da177e4SLinus Torvalds module_exit(exit_nfsd) 1592