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_proc_open(struct inode *inode, struct file *file) 15796d851c4SStanislav Kinsbursky { 15896d851c4SStanislav Kinsbursky return exports_net_open(current->nsproxy->net_ns, file); 15996d851c4SStanislav Kinsbursky } 16096d851c4SStanislav Kinsbursky 16197a32539SAlexey Dobriyan static const struct proc_ops exports_proc_ops = { 16297a32539SAlexey Dobriyan .proc_open = exports_proc_open, 16397a32539SAlexey Dobriyan .proc_read = seq_read, 16497a32539SAlexey Dobriyan .proc_lseek = seq_lseek, 16597a32539SAlexey Dobriyan .proc_release = seq_release, 16696d851c4SStanislav Kinsbursky }; 16796d851c4SStanislav Kinsbursky 16896d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 16996d851c4SStanislav Kinsbursky { 17096d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 17196d851c4SStanislav Kinsbursky } 17296d851c4SStanislav Kinsbursky 17396d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 17496d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1751da177e4SLinus Torvalds .read = seq_read, 1761da177e4SLinus Torvalds .llseek = seq_lseek, 1771da177e4SLinus Torvalds .release = seq_release, 1781da177e4SLinus Torvalds }; 1791da177e4SLinus Torvalds 180e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 181e8e8753fSJ. Bruce Fields { 182e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 183e8e8753fSJ. Bruce Fields return 0; 184e8e8753fSJ. Bruce Fields } 185e8e8753fSJ. Bruce Fields 1869beeaab8SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(export_features); 187e8e8753fSJ. Bruce Fields 188828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 18903cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 19003cf6c9fSGreg Banks .read = seq_read, 19103cf6c9fSGreg Banks .llseek = seq_lseek, 192ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 19303cf6c9fSGreg Banks }; 19403cf6c9fSGreg Banks 19564776611SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); 196a2f999a3SJeff Layton 1971342f9ddSChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats); 1982e6c6e4cSChuck Lever 1991da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 2001da177e4SLinus Torvalds /* 2011da177e4SLinus Torvalds * payload - write methods 2021da177e4SLinus Torvalds */ 2031da177e4SLinus Torvalds 204244c7d44SAl Viro static inline struct net *netns(struct file *file) 205244c7d44SAl Viro { 206244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 207244c7d44SAl Viro } 2081da177e4SLinus Torvalds 209f2453978SChuck Lever /* 210262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 211262a0982SChuck Lever * 212262a0982SChuck Lever * Experimental. 213262a0982SChuck Lever * 214262a0982SChuck Lever * Input: 215262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2164116092bSChuck Lever * presentation format IP address 217262a0982SChuck Lever * size: length of C string in @buf 218262a0982SChuck Lever * Output: 219262a0982SChuck Lever * On success: returns zero if all specified locks were released; 220262a0982SChuck Lever * returns one if one or more locks were not released 221262a0982SChuck Lever * On error: return code is negative errno value 222262a0982SChuck Lever */ 223b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2244373ea84SWendy Cheng { 2254116092bSChuck Lever struct sockaddr_storage address; 2264116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2274116092bSChuck Lever size_t salen = sizeof(address); 228367c8c7bSChuck Lever char *fo_path; 229244c7d44SAl Viro struct net *net = netns(file); 2304373ea84SWendy Cheng 2314373ea84SWendy Cheng /* sanity check */ 2324373ea84SWendy Cheng if (size == 0) 2334373ea84SWendy Cheng return -EINVAL; 2344373ea84SWendy Cheng 2354373ea84SWendy Cheng if (buf[size-1] != '\n') 2364373ea84SWendy Cheng return -EINVAL; 2374373ea84SWendy Cheng 2384373ea84SWendy Cheng fo_path = buf; 2394373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2404373ea84SWendy Cheng return -EINVAL; 2414373ea84SWendy Cheng 24211f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2434373ea84SWendy Cheng return -EINVAL; 2444373ea84SWendy Cheng 2454116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2464373ea84SWendy Cheng } 2474373ea84SWendy Cheng 248f2453978SChuck Lever /* 249262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 250262a0982SChuck Lever * 251262a0982SChuck Lever * Experimental. 252262a0982SChuck Lever * 253262a0982SChuck Lever * Input: 254262a0982SChuck Lever * buf: '\n'-terminated C string containing the 255262a0982SChuck Lever * absolute pathname of a local file system 256262a0982SChuck Lever * size: length of C string in @buf 257262a0982SChuck Lever * Output: 258262a0982SChuck Lever * On success: returns zero if all specified locks were released; 259262a0982SChuck Lever * returns one if one or more locks were not released 260262a0982SChuck Lever * On error: return code is negative errno value 261262a0982SChuck Lever */ 262b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 26317efa372SWendy Cheng { 264a63bb996SAl Viro struct path path; 26517efa372SWendy Cheng char *fo_path; 26617efa372SWendy Cheng int error; 26717efa372SWendy Cheng 26817efa372SWendy Cheng /* sanity check */ 26917efa372SWendy Cheng if (size == 0) 27017efa372SWendy Cheng return -EINVAL; 27117efa372SWendy Cheng 27217efa372SWendy Cheng if (buf[size-1] != '\n') 27317efa372SWendy Cheng return -EINVAL; 27417efa372SWendy Cheng 27517efa372SWendy Cheng fo_path = buf; 27617efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 27717efa372SWendy Cheng return -EINVAL; 27817efa372SWendy Cheng 279a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 28017efa372SWendy Cheng if (error) 28117efa372SWendy Cheng return error; 28217efa372SWendy Cheng 283262a0982SChuck Lever /* 284262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 285262a0982SChuck Lever * releasing locks on the wrong file system. 286262a0982SChuck Lever * 287262a0982SChuck Lever * For example: 288262a0982SChuck Lever * 1. Does the path refer to a directory? 289262a0982SChuck Lever * 2. Is that directory a mount point, or 290262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 291262a0982SChuck Lever */ 292d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 29317efa372SWendy Cheng 294a63bb996SAl Viro path_put(&path); 29517efa372SWendy Cheng return error; 29617efa372SWendy Cheng } 29717efa372SWendy Cheng 298f2453978SChuck Lever /* 299262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 300262a0982SChuck Lever * 301262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 302262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 303262a0982SChuck Lever * contain escape sequences. 304262a0982SChuck Lever * 305262a0982SChuck Lever * Input: 306262a0982SChuck Lever * buf: 307262a0982SChuck Lever * domain: client domain name 308262a0982SChuck Lever * path: export pathname 309262a0982SChuck Lever * maxsize: numeric maximum size of 310262a0982SChuck Lever * @buf 311262a0982SChuck Lever * size: length of C string in @buf 312262a0982SChuck Lever * Output: 313262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 314262a0982SChuck Lever * string containing a ASCII hex text version 315262a0982SChuck Lever * of the NFS file handle; 316262a0982SChuck Lever * return code is the size in bytes of the string 317262a0982SChuck Lever * On error: return code is negative errno value 318262a0982SChuck Lever */ 3191da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3201da177e4SLinus Torvalds { 3211da177e4SLinus Torvalds char *dname, *path; 3223f649ab7SKees Cook int maxsize; 3231da177e4SLinus Torvalds char *mesg = buf; 3241da177e4SLinus Torvalds int len; 3251da177e4SLinus Torvalds struct auth_domain *dom; 3261da177e4SLinus Torvalds struct knfsd_fh fh; 3271da177e4SLinus Torvalds 32887d26ea7SJ. Bruce Fields if (size == 0) 32987d26ea7SJ. Bruce Fields return -EINVAL; 33087d26ea7SJ. Bruce Fields 3311da177e4SLinus Torvalds if (buf[size-1] != '\n') 3321da177e4SLinus Torvalds return -EINVAL; 3331da177e4SLinus Torvalds buf[size-1] = 0; 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds dname = mesg; 3361da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 33754224f04SChuck Lever if (len <= 0) 33854224f04SChuck Lever return -EINVAL; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds path = dname+len+1; 3411da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 34254224f04SChuck Lever if (len <= 0) 34354224f04SChuck Lever return -EINVAL; 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3461da177e4SLinus Torvalds if (len) 3471da177e4SLinus Torvalds return len; 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3501da177e4SLinus Torvalds return -EINVAL; 3513c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3541da177e4SLinus Torvalds return -EINVAL; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3571da177e4SLinus Torvalds dom = unix_domain_find(dname); 3581da177e4SLinus Torvalds if (!dom) 3591da177e4SLinus Torvalds return -ENOMEM; 3601da177e4SLinus Torvalds 361244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3621da177e4SLinus Torvalds auth_domain_put(dom); 3631da177e4SLinus Torvalds if (len) 3641da177e4SLinus Torvalds return len; 3651da177e4SLinus Torvalds 36654224f04SChuck Lever mesg = buf; 36754224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 368d8b26071SNeilBrown qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size); 3691da177e4SLinus Torvalds mesg[-1] = '\n'; 3701da177e4SLinus Torvalds return mesg - buf; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds 373f2453978SChuck Lever /* 374262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 375262a0982SChuck Lever * 376262a0982SChuck Lever * Input: 377262a0982SChuck Lever * buf: ignored 378262a0982SChuck Lever * size: zero 379262a0982SChuck Lever * Output: 380262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 381262a0982SChuck Lever * string numeric value representing the number of 382262a0982SChuck Lever * running NFSD threads; 383262a0982SChuck Lever * return code is the size in bytes of the string 384262a0982SChuck Lever * On error: return code is zero 385262a0982SChuck Lever * 386262a0982SChuck Lever * OR 387262a0982SChuck Lever * 388262a0982SChuck Lever * Input: 389262a0982SChuck Lever * buf: C string containing an unsigned 390262a0982SChuck Lever * integer value representing the 391262a0982SChuck Lever * number of NFSD threads to start 392262a0982SChuck Lever * size: non-zero length of C string in @buf 393262a0982SChuck Lever * Output: 394262a0982SChuck Lever * On success: NFS service is started; 395262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 396262a0982SChuck Lever * string numeric value representing the number of 397262a0982SChuck Lever * running NFSD threads; 398262a0982SChuck Lever * return code is the size in bytes of the string 399262a0982SChuck Lever * On error: return code is zero or a negative errno value 400262a0982SChuck Lever */ 4011da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 4021da177e4SLinus Torvalds { 4031da177e4SLinus Torvalds char *mesg = buf; 4041da177e4SLinus Torvalds int rv; 405244c7d44SAl Viro struct net *net = netns(file); 406d41a9417SStanislav Kinsbursky 4071da177e4SLinus Torvalds if (size > 0) { 4081da177e4SLinus Torvalds int newthreads; 4091da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4101da177e4SLinus Torvalds if (rv) 4111da177e4SLinus Torvalds return rv; 4121da177e4SLinus Torvalds if (newthreads < 0) 4131da177e4SLinus Torvalds return -EINVAL; 4144df493a2STrond Myklebust rv = nfsd_svc(newthreads, net, file->f_cred); 41582e12fe9SNeilBrown if (rv < 0) 4161da177e4SLinus Torvalds return rv; 41782e12fe9SNeilBrown } else 4189dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 419e06b6405SChuck Lever 42082e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 423f2453978SChuck Lever /* 424262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 425262a0982SChuck Lever * 426262a0982SChuck Lever * Input: 427262a0982SChuck Lever * buf: ignored 428262a0982SChuck Lever * size: zero 429262a0982SChuck Lever * 430262a0982SChuck Lever * OR 431262a0982SChuck Lever * 432262a0982SChuck Lever * Input: 433262a0982SChuck Lever * buf: C string containing whitespace- 434262a0982SChuck Lever * separated unsigned integer values 435262a0982SChuck Lever * representing the number of NFSD 436262a0982SChuck Lever * threads to start in each pool 437262a0982SChuck Lever * size: non-zero length of C string in @buf 438262a0982SChuck Lever * Output: 439262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 440262a0982SChuck Lever * string containing integer values representing the 441262a0982SChuck Lever * number of NFSD threads in each pool; 442262a0982SChuck Lever * return code is the size in bytes of the string 443262a0982SChuck Lever * On error: return code is zero or a negative errno value 444262a0982SChuck Lever */ 445eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 446eed2965aSGreg Banks { 447eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 448eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 449eed2965aSGreg Banks */ 450eed2965aSGreg Banks char *mesg = buf; 451eed2965aSGreg Banks int i; 452eed2965aSGreg Banks int rv; 453eed2965aSGreg Banks int len; 454bedbdd8bSNeil Brown int npools; 455eed2965aSGreg Banks int *nthreads; 456244c7d44SAl Viro struct net *net = netns(file); 457eed2965aSGreg Banks 458bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4599dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 460eed2965aSGreg Banks if (npools == 0) { 461eed2965aSGreg Banks /* 462eed2965aSGreg Banks * NFS is shut down. The admin can start it by 463eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 464eed2965aSGreg Banks * file, sorry. Report zero threads. 465eed2965aSGreg Banks */ 466bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 467eed2965aSGreg Banks strcpy(buf, "0\n"); 468eed2965aSGreg Banks return strlen(buf); 469eed2965aSGreg Banks } 470eed2965aSGreg Banks 471eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 472bedbdd8bSNeil Brown rv = -ENOMEM; 473eed2965aSGreg Banks if (nthreads == NULL) 474bedbdd8bSNeil Brown goto out_free; 475eed2965aSGreg Banks 476eed2965aSGreg Banks if (size > 0) { 477eed2965aSGreg Banks for (i = 0; i < npools; i++) { 478eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 479eed2965aSGreg Banks if (rv == -ENOENT) 480eed2965aSGreg Banks break; /* fewer numbers than pools */ 481eed2965aSGreg Banks if (rv) 482eed2965aSGreg Banks goto out_free; /* syntax error */ 483eed2965aSGreg Banks rv = -EINVAL; 484eed2965aSGreg Banks if (nthreads[i] < 0) 485eed2965aSGreg Banks goto out_free; 486eed2965aSGreg Banks } 4873938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 488eed2965aSGreg Banks if (rv) 489eed2965aSGreg Banks goto out_free; 490eed2965aSGreg Banks } 491eed2965aSGreg Banks 4929dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 493eed2965aSGreg Banks if (rv) 494eed2965aSGreg Banks goto out_free; 495eed2965aSGreg Banks 496eed2965aSGreg Banks mesg = buf; 497eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 498eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 499eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 500eed2965aSGreg Banks len = strlen(mesg); 501eed2965aSGreg Banks size -= len; 502eed2965aSGreg Banks mesg += len; 503eed2965aSGreg Banks } 504413d63d7SJ. Bruce Fields rv = mesg - buf; 505eed2965aSGreg Banks out_free: 506eed2965aSGreg Banks kfree(nthreads); 507bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 508eed2965aSGreg Banks return rv; 509eed2965aSGreg Banks } 510eed2965aSGreg Banks 511ff7d1179STrond Myklebust static ssize_t 512e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 513e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 514ff7d1179STrond Myklebust { 515abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 516e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 517ff7d1179STrond Myklebust 518abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 519e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 520ff7d1179STrond Myklebust supported = false; 521abcb4dacSNeilBrown if (minor == 0 && supported) 522abcb4dacSNeilBrown /* 523abcb4dacSNeilBrown * special case for backward compatability. 524abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 525abcb4dacSNeilBrown * +4, unless -4.0 is present. 526abcb4dacSNeilBrown */ 527abcb4dacSNeilBrown return 0; 528ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 529ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 530ff7d1179STrond Myklebust } 531ff7d1179STrond Myklebust 5323dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 53370c3b76cSNeilBrown { 53470c3b76cSNeilBrown char *mesg = buf; 5358daf220aSBenny Halevy char *vers, *minorp, sign; 536261758b5SChuck Lever int len, num, remaining; 53770c3b76cSNeilBrown ssize_t tlen = 0; 53870c3b76cSNeilBrown char *sep; 539244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 54070c3b76cSNeilBrown 54170c3b76cSNeilBrown if (size>0) { 5429dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5436658d3a7SNeilBrown /* Cannot change versions without updating 5449dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5456658d3a7SNeilBrown * rq_argp and rq_resp 5466658d3a7SNeilBrown */ 54770c3b76cSNeilBrown return -EBUSY; 54870c3b76cSNeilBrown if (buf[size-1] != '\n') 54970c3b76cSNeilBrown return -EINVAL; 55070c3b76cSNeilBrown buf[size-1] = 0; 55170c3b76cSNeilBrown 55270c3b76cSNeilBrown vers = mesg; 55370c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 55470c3b76cSNeilBrown if (len <= 0) return -EINVAL; 55570c3b76cSNeilBrown do { 556d3635ff0STrond Myklebust enum vers_op cmd; 557abcb4dacSNeilBrown unsigned minor; 55870c3b76cSNeilBrown sign = *vers; 55970c3b76cSNeilBrown if (sign == '+' || sign == '-') 5608daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 56170c3b76cSNeilBrown else 5628daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5638daf220aSBenny Halevy if (*minorp == '.') { 564ff89be87SJ. Bruce Fields if (num != 4) 5658daf220aSBenny Halevy return -EINVAL; 566e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5678daf220aSBenny Halevy return -EINVAL; 568abcb4dacSNeilBrown } 569abcb4dacSNeilBrown 570d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 57170c3b76cSNeilBrown switch(num) { 5722f3a4b2aSJeff Layton #ifdef CONFIG_NFSD_V2 57370c3b76cSNeilBrown case 2: 5742f3a4b2aSJeff Layton #endif 57570c3b76cSNeilBrown case 3: 576e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 577d3635ff0STrond Myklebust break; 57870c3b76cSNeilBrown case 4: 579abcb4dacSNeilBrown if (*minorp == '.') { 580e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 581abcb4dacSNeilBrown return -EINVAL; 582e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 583abcb4dacSNeilBrown /* 584abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 585abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 586abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 587abcb4dacSNeilBrown */ 588abcb4dacSNeilBrown minor = 0; 589e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 590abcb4dacSNeilBrown minor++; 591abcb4dacSNeilBrown } 59270c3b76cSNeilBrown break; 59370c3b76cSNeilBrown default: 5948e823bafSJeff Layton /* Ignore requests to disable non-existent versions */ 5958e823bafSJeff Layton if (cmd == NFSD_SET) 59670c3b76cSNeilBrown return -EINVAL; 59770c3b76cSNeilBrown } 59870c3b76cSNeilBrown vers += len + 1; 59970c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 60070c3b76cSNeilBrown /* If all get turned off, turn them back on, as 60170c3b76cSNeilBrown * having no versions is BAD 60270c3b76cSNeilBrown */ 603e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 60470c3b76cSNeilBrown } 605261758b5SChuck Lever 60670c3b76cSNeilBrown /* Now write current state into reply buffer */ 60770c3b76cSNeilBrown sep = ""; 608261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 609ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 610abcb4dacSNeilBrown int minor; 611e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 612e35659f1SNeilBrown continue; 613abcb4dacSNeilBrown 614abcb4dacSNeilBrown minor = -1; 615ff7d1179STrond Myklebust do { 616e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 617ff7d1179STrond Myklebust sep, num, minor); 618818f2f57SDan Carpenter if (len >= remaining) 619ff7d1179STrond Myklebust goto out; 620261758b5SChuck Lever remaining -= len; 621261758b5SChuck Lever buf += len; 622261758b5SChuck Lever tlen += len; 623ff7d1179STrond Myklebust minor++; 624abcb4dacSNeilBrown if (len) 625ff7d1179STrond Myklebust sep = " "; 626ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 627261758b5SChuck Lever } 628ff7d1179STrond Myklebust out: 629261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 630818f2f57SDan Carpenter if (len >= remaining) 631261758b5SChuck Lever return -EINVAL; 632261758b5SChuck Lever return tlen + len; 63370c3b76cSNeilBrown } 63470c3b76cSNeilBrown 635f2453978SChuck Lever /* 636262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 637262a0982SChuck Lever * 638262a0982SChuck Lever * Input: 639262a0982SChuck Lever * buf: ignored 640262a0982SChuck Lever * size: zero 641262a0982SChuck Lever * Output: 642262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 643262a0982SChuck Lever * string containing positive or negative integer 644262a0982SChuck Lever * values representing the current status of each 645262a0982SChuck Lever * protocol version; 646262a0982SChuck Lever * return code is the size in bytes of the string 647262a0982SChuck Lever * On error: return code is zero or a negative errno value 648262a0982SChuck Lever * 649262a0982SChuck Lever * OR 650262a0982SChuck Lever * 651262a0982SChuck Lever * Input: 652262a0982SChuck Lever * buf: C string containing whitespace- 653262a0982SChuck Lever * separated positive or negative 654262a0982SChuck Lever * integer values representing NFS 655262a0982SChuck Lever * protocol versions to enable ("+n") 656262a0982SChuck Lever * or disable ("-n") 657262a0982SChuck Lever * size: non-zero length of C string in @buf 658262a0982SChuck Lever * Output: 659262a0982SChuck Lever * On success: status of zero or more protocol versions has 660262a0982SChuck Lever * been updated; passed-in buffer filled with 661262a0982SChuck Lever * '\n'-terminated C string containing positive 662262a0982SChuck Lever * or negative integer values representing the 663262a0982SChuck Lever * current status of each protocol version; 664262a0982SChuck Lever * return code is the size in bytes of the string 665262a0982SChuck Lever * On error: return code is zero or a negative errno value 666262a0982SChuck Lever */ 6673dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6683dd98a3bSJeff Layton { 6693dd98a3bSJeff Layton ssize_t rv; 6703dd98a3bSJeff Layton 6713dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6723dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6733dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6743dd98a3bSJeff Layton return rv; 6753dd98a3bSJeff Layton } 6763dd98a3bSJeff Layton 6774cd5dc75SChuck Lever /* 6780a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 6790a5372d8SChuck Lever * transports. 6800a5372d8SChuck Lever */ 6819dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 6820a5372d8SChuck Lever { 6839dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6849dd9845fSStanislav Kinsbursky 6859dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 6860a5372d8SChuck Lever return 0; 6879dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 6880a5372d8SChuck Lever } 6890a5372d8SChuck Lever 6900a5372d8SChuck Lever /* 6910b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 6920b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 6930b7c2f6fSChuck Lever * nfsd listener. 6940b7c2f6fSChuck Lever */ 6954df493a2STrond Myklebust static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 6960b7c2f6fSChuck Lever { 6970b7c2f6fSChuck Lever char *mesg = buf; 6980b7c2f6fSChuck Lever int fd, err; 6999dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7000b7c2f6fSChuck Lever 7010b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 7020b7c2f6fSChuck Lever if (err != 0 || fd < 0) 7030b7c2f6fSChuck Lever return -EINVAL; 7040b7c2f6fSChuck Lever 70530646394SStanislav Kinsbursky if (svc_alien_sock(net, fd)) { 70630646394SStanislav Kinsbursky printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); 70730646394SStanislav Kinsbursky return -EINVAL; 70830646394SStanislav Kinsbursky } 70930646394SStanislav Kinsbursky 7106777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7110b7c2f6fSChuck Lever if (err != 0) 7120b7c2f6fSChuck Lever return err; 7130b7c2f6fSChuck Lever 7144df493a2STrond Myklebust err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 715ea068badSChuck Lever 716ec52361dSNeilBrown if (err >= 0 && 717ec52361dSNeilBrown !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 718ec52361dSNeilBrown svc_get(nn->nfsd_serv); 719ec52361dSNeilBrown 720ec52361dSNeilBrown nfsd_put(net); 721ea068badSChuck Lever return err; 7220b7c2f6fSChuck Lever } 7230b7c2f6fSChuck Lever 7240b7c2f6fSChuck Lever /* 7254eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 7264eb68c26SChuck Lever * a port number. 7274eb68c26SChuck Lever */ 7284df493a2STrond Myklebust static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 7294eb68c26SChuck Lever { 7304eb68c26SChuck Lever char transport[16]; 73137498292SChuck Lever struct svc_xprt *xprt; 7324eb68c26SChuck Lever int port, err; 7339dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7344eb68c26SChuck Lever 735a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7364eb68c26SChuck Lever return -EINVAL; 7374eb68c26SChuck Lever 7384be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7394eb68c26SChuck Lever return -EINVAL; 7404eb68c26SChuck Lever 7416777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7424eb68c26SChuck Lever if (err != 0) 7434eb68c26SChuck Lever return err; 7444eb68c26SChuck Lever 745352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7464df493a2STrond Myklebust PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 74768717908SChuck Lever if (err < 0) 74837498292SChuck Lever goto out_err; 74937498292SChuck Lever 750352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7514df493a2STrond Myklebust PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 75237498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 75337498292SChuck Lever goto out_close; 7540cd14a06SJeff Layton 755ec52361dSNeilBrown if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 756ec52361dSNeilBrown svc_get(nn->nfsd_serv); 757ec52361dSNeilBrown 758ec52361dSNeilBrown nfsd_put(net); 7594eb68c26SChuck Lever return 0; 76037498292SChuck Lever out_close: 7619dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 76237498292SChuck Lever if (xprt != NULL) { 7634355d767SChuck Lever svc_xprt_close(xprt); 76437498292SChuck Lever svc_xprt_put(xprt); 76537498292SChuck Lever } 76637498292SChuck Lever out_err: 7678c62d127SNeilBrown nfsd_put(net); 76837498292SChuck Lever return err; 7694eb68c26SChuck Lever } 7704eb68c26SChuck Lever 77108160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 77208160352SStanislav Kinsbursky struct net *net) 77380212d59SNeilBrown { 7740a5372d8SChuck Lever if (size == 0) 7759dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 7760b7c2f6fSChuck Lever 7770b7c2f6fSChuck Lever if (isdigit(buf[0])) 7784df493a2STrond Myklebust return __write_ports_addfd(buf, net, file->f_cred); 77982d56591SChuck Lever 7804eb68c26SChuck Lever if (isalpha(buf[0])) 7814df493a2STrond Myklebust return __write_ports_addxprt(buf, net, file->f_cred); 7824cd5dc75SChuck Lever 783b41b66d6SNeilBrown return -EINVAL; 784b41b66d6SNeilBrown } 78580212d59SNeilBrown 786f2453978SChuck Lever /* 787262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 788262a0982SChuck Lever * 789262a0982SChuck Lever * Input: 790262a0982SChuck Lever * buf: ignored 791262a0982SChuck Lever * size: zero 792262a0982SChuck Lever * Output: 793262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 794262a0982SChuck Lever * string containing a whitespace-separated list of 795262a0982SChuck Lever * named NFSD listeners; 796262a0982SChuck Lever * return code is the size in bytes of the string 797262a0982SChuck Lever * On error: return code is zero or a negative errno value 798262a0982SChuck Lever * 799262a0982SChuck Lever * OR 800262a0982SChuck Lever * 801262a0982SChuck Lever * Input: 802262a0982SChuck Lever * buf: C string containing an unsigned 803262a0982SChuck Lever * integer value representing a bound 804262a0982SChuck Lever * but unconnected socket that is to be 805c71206a7SChuck Lever * used as an NFSD listener; listen(3) 806c71206a7SChuck Lever * must be called for a SOCK_STREAM 807c71206a7SChuck Lever * socket, otherwise it is ignored 808262a0982SChuck Lever * size: non-zero length of C string in @buf 809262a0982SChuck Lever * Output: 810262a0982SChuck Lever * On success: NFS service is started; 811262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 812262a0982SChuck Lever * string containing a unique alphanumeric name of 813262a0982SChuck Lever * the listener; 814262a0982SChuck Lever * return code is the size in bytes of the string 815262a0982SChuck Lever * On error: return code is a negative errno value 816262a0982SChuck Lever * 817262a0982SChuck Lever * OR 818262a0982SChuck Lever * 819262a0982SChuck Lever * Input: 820262a0982SChuck Lever * buf: C string containing a transport 821262a0982SChuck Lever * name and an unsigned integer value 822262a0982SChuck Lever * representing the port to listen on, 823262a0982SChuck Lever * separated by whitespace 824262a0982SChuck Lever * size: non-zero length of C string in @buf 825262a0982SChuck Lever * Output: 826262a0982SChuck Lever * On success: returns zero; NFS service is started 827262a0982SChuck Lever * On error: return code is a negative errno value 828262a0982SChuck Lever */ 829bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 830bedbdd8bSNeil Brown { 831bedbdd8bSNeil Brown ssize_t rv; 8323dd98a3bSJeff Layton 833bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 834244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 835bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 836bedbdd8bSNeil Brown return rv; 837bedbdd8bSNeil Brown } 838bedbdd8bSNeil Brown 839bedbdd8bSNeil Brown 840596bbe53SNeilBrown int nfsd_max_blksize; 841596bbe53SNeilBrown 842f2453978SChuck Lever /* 843262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 844262a0982SChuck Lever * 845262a0982SChuck Lever * Input: 846262a0982SChuck Lever * buf: ignored 847262a0982SChuck Lever * size: zero 848262a0982SChuck Lever * 849262a0982SChuck Lever * OR 850262a0982SChuck Lever * 851262a0982SChuck Lever * Input: 852262a0982SChuck Lever * buf: C string containing an unsigned 853262a0982SChuck Lever * integer value representing the new 854262a0982SChuck Lever * NFS blksize 855262a0982SChuck Lever * size: non-zero length of C string in @buf 856262a0982SChuck Lever * Output: 857262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 858262a0982SChuck Lever * containing numeric value of the current NFS blksize 859262a0982SChuck Lever * setting; 860262a0982SChuck Lever * return code is the size in bytes of the string 861262a0982SChuck Lever * On error: return code is zero or a negative errno value 862262a0982SChuck Lever */ 863596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 864596bbe53SNeilBrown { 865596bbe53SNeilBrown char *mesg = buf; 866244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8679dd9845fSStanislav Kinsbursky 868596bbe53SNeilBrown if (size > 0) { 869596bbe53SNeilBrown int bsize; 870596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 871596bbe53SNeilBrown if (rv) 872596bbe53SNeilBrown return rv; 873596bbe53SNeilBrown /* force bsize into allowed range and 874596bbe53SNeilBrown * required alignment. 875596bbe53SNeilBrown */ 8763c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 8773c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 878596bbe53SNeilBrown bsize &= ~(1024-1); 879bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 8809dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 881bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 882596bbe53SNeilBrown return -EBUSY; 883596bbe53SNeilBrown } 884596bbe53SNeilBrown nfsd_max_blksize = bsize; 885bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 886596bbe53SNeilBrown } 887e06b6405SChuck Lever 888e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 889e06b6405SChuck Lever nfsd_max_blksize); 890596bbe53SNeilBrown } 891596bbe53SNeilBrown 892f2453978SChuck Lever /* 8935b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 8945b8db00bSJeff Layton * 8955b8db00bSJeff Layton * Input: 8965b8db00bSJeff Layton * buf: ignored 8975b8db00bSJeff Layton * size: zero 8985b8db00bSJeff Layton * OR 8995b8db00bSJeff Layton * 9005b8db00bSJeff Layton * Input: 9015b8db00bSJeff Layton * buf: C string containing an unsigned 9025b8db00bSJeff Layton * integer value representing the new 9035b8db00bSJeff Layton * number of max connections 9045b8db00bSJeff Layton * size: non-zero length of C string in @buf 9055b8db00bSJeff Layton * Output: 9065b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9075b8db00bSJeff Layton * containing numeric value of max_connections setting 9085b8db00bSJeff Layton * for this net namespace; 9095b8db00bSJeff Layton * return code is the size in bytes of the string 9105b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9115b8db00bSJeff Layton */ 9125b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9135b8db00bSJeff Layton { 9145b8db00bSJeff Layton char *mesg = buf; 915244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9165b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9175b8db00bSJeff Layton 9185b8db00bSJeff Layton if (size > 0) { 9195b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9205b8db00bSJeff Layton 9215b8db00bSJeff Layton if (rv) 9225b8db00bSJeff Layton return rv; 9235b8db00bSJeff Layton nn->max_connections = maxconn; 9245b8db00bSJeff Layton } 9255b8db00bSJeff Layton 9265b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9275b8db00bSJeff Layton } 9285b8db00bSJeff Layton 92970c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9309dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 93120b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 9321da177e4SLinus Torvalds { 9331da177e4SLinus Torvalds char *mesg = buf; 934f0135740SJ. Bruce Fields int rv, i; 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds if (size > 0) { 9379dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9383dd98a3bSJeff Layton return -EBUSY; 939f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9401da177e4SLinus Torvalds if (rv) 9411da177e4SLinus Torvalds return rv; 942e7b184f1SJ. Bruce Fields /* 943e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 944e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 945e7b184f1SJ. Bruce Fields * extremes are: 946e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 947e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 948e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 949e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 950e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 951e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 952e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 953e7b184f1SJ. Bruce Fields */ 954f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9551da177e4SLinus Torvalds return -EINVAL; 956f0135740SJ. Bruce Fields *time = i; 9571da177e4SLinus Torvalds } 958e06b6405SChuck Lever 95920b7d86fSArnd Bergmann return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); 960f0135740SJ. Bruce Fields } 961f0135740SJ. Bruce Fields 9629dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 96320b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 964f0135740SJ. Bruce Fields { 965f0135740SJ. Bruce Fields ssize_t rv; 966f0135740SJ. Bruce Fields 967f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9689dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 969f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 970f0135740SJ. Bruce Fields return rv; 9711da177e4SLinus Torvalds } 9721da177e4SLinus Torvalds 973f2453978SChuck Lever /* 974262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 975262a0982SChuck Lever * 976262a0982SChuck Lever * Input: 977262a0982SChuck Lever * buf: ignored 978262a0982SChuck Lever * size: zero 979262a0982SChuck Lever * 980262a0982SChuck Lever * OR 981262a0982SChuck Lever * 982262a0982SChuck Lever * Input: 983262a0982SChuck Lever * buf: C string containing an unsigned 984262a0982SChuck Lever * integer value representing the new 985262a0982SChuck Lever * NFSv4 lease expiry time 986262a0982SChuck Lever * size: non-zero length of C string in @buf 987262a0982SChuck Lever * Output: 988262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 989262a0982SChuck Lever * string containing unsigned integer value of the 990262a0982SChuck Lever * current lease expiry time; 991262a0982SChuck Lever * return code is the size in bytes of the string 992262a0982SChuck Lever * On error: return code is zero or a negative errno value 993262a0982SChuck Lever */ 9943dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 9953dd98a3bSJeff Layton { 996244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9979dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 9983dd98a3bSJeff Layton } 9993dd98a3bSJeff Layton 1000f2453978SChuck Lever /* 1001efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1002efc4bb4fSJ. Bruce Fields * 1003efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1004efc4bb4fSJ. Bruce Fields * 1005efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1006efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1007efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1008efc4bb4fSJ. Bruce Fields * anyway.) 1009efc4bb4fSJ. Bruce Fields */ 1010efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1011efc4bb4fSJ. Bruce Fields { 1012244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10139dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1014efc4bb4fSJ. Bruce Fields } 1015efc4bb4fSJ. Bruce Fields 10169dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10179dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10180964a3d3SNeilBrown { 10190964a3d3SNeilBrown char *mesg = buf; 10200964a3d3SNeilBrown char *recdir; 10210964a3d3SNeilBrown int len, status; 10220964a3d3SNeilBrown 10233dd98a3bSJeff Layton if (size > 0) { 10249dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10253dd98a3bSJeff Layton return -EBUSY; 10263dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10270964a3d3SNeilBrown return -EINVAL; 10280964a3d3SNeilBrown buf[size-1] = 0; 10290964a3d3SNeilBrown 10300964a3d3SNeilBrown recdir = mesg; 10310964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10320964a3d3SNeilBrown if (len <= 0) 10330964a3d3SNeilBrown return -EINVAL; 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; 11077f5ef2e9SJeff Layton nfsd4_end_grace(nn); 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 */ 12124df750c9SChuck 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; 1217*4b471a8bSChuck Lever int ret; 12184df750c9SChuck Lever 12194df750c9SChuck Lever inode_lock(dir); 12204df750c9SChuck Lever dentry = d_alloc_name(parent, name); 12214df750c9SChuck Lever if (!dentry) 1222*4b471a8bSChuck Lever goto out; 12234df750c9SChuck Lever ret = __nfsd_symlink(d_inode(parent), dentry, S_IFLNK | 0777, content); 12244df750c9SChuck Lever if (ret) 1225*4b471a8bSChuck Lever dput(dentry); 12264df750c9SChuck Lever out: 12274df750c9SChuck Lever inode_unlock(dir); 12284df750c9SChuck Lever } 12294df750c9SChuck Lever #else 12304df750c9SChuck 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; 14094df750c9SChuck 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 1461e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1462e331f606SJ. Bruce Fields { 1463e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1464e331f606SJ. Bruce Fields 1465e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1466e331f606SJ. Bruce Fields if (!entry) 1467e331f606SJ. Bruce Fields return -ENOMEM; 146897a32539SAlexey Dobriyan entry = proc_create("exports", 0, entry, &exports_proc_ops); 1469ff7c4b36Sfanchaoting if (!entry) { 1470ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1471e331f606SJ. Bruce Fields return -ENOMEM; 1472ff7c4b36Sfanchaoting } 1473e331f606SJ. Bruce Fields return 0; 1474e331f606SJ. Bruce Fields } 1475e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1476e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1477e331f606SJ. Bruce Fields { 1478e331f606SJ. Bruce Fields return 0; 1479e331f606SJ. Bruce Fields } 1480e331f606SJ. Bruce Fields #endif 1481e331f606SJ. Bruce Fields 1482c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 14835717e012SStanislav Kinsbursky 14845717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 14855717e012SStanislav Kinsbursky { 14865717e012SStanislav Kinsbursky int retval; 14873d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 14885717e012SStanislav Kinsbursky 14895717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 14905717e012SStanislav Kinsbursky if (retval) 14915717e012SStanislav Kinsbursky goto out_export_error; 1492f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1493f69adb2fSStanislav Kinsbursky if (retval) 1494f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1495e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1496e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 1497f385f7d2SDai Ngo nfsd4_init_leases_net(nn); 149891d2e9b5SChuck Lever get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); 149991d2e9b5SChuck Lever seqlock_init(&nn->writeverf_lock); 15002c830dd7SJ. Bruce Fields 15015717e012SStanislav Kinsbursky return 0; 15025717e012SStanislav Kinsbursky 1503f69adb2fSStanislav Kinsbursky out_idmap_error: 1504f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 15055717e012SStanislav Kinsbursky out_export_error: 15065717e012SStanislav Kinsbursky return retval; 15075717e012SStanislav Kinsbursky } 15085717e012SStanislav Kinsbursky 15095717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 15105717e012SStanislav Kinsbursky { 1511f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 15125717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1513e333f3bbSTrond Myklebust nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); 15145717e012SStanislav Kinsbursky } 15155717e012SStanislav Kinsbursky 15167ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 15175717e012SStanislav Kinsbursky .init = nfsd_init_net, 15185717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 15197ea34ac1SJeff Layton .id = &nfsd_net_id, 15207ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 15217ea34ac1SJeff Layton }; 15227ea34ac1SJeff Layton 15231da177e4SLinus Torvalds static int __init init_nfsd(void) 15241da177e4SLinus Torvalds { 15251da177e4SLinus Torvalds int retval; 15261da177e4SLinus Torvalds 1527bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1528bb7ffbf2SGiuseppe Cantavenera if (retval) 1529b10252c7SAlexander Sverdlin return retval; 15309cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 153165178db4SBryan Schumaker if (retval) 153265178db4SBryan Schumaker goto out_free_slabs; 1533e567b98cSAmir Goldstein retval = nfsd_stat_init(); /* Statistics */ 1534e567b98cSAmir Goldstein if (retval) 1535e567b98cSAmir Goldstein goto out_free_pnfs; 1536027690c7SJ. Bruce Fields retval = nfsd_drc_slab_create(); 1537027690c7SJ. Bruce Fields if (retval) 1538027690c7SJ. Bruce Fields goto out_free_stat; 15391da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1540e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1541e331f606SJ. Bruce Fields if (retval) 1542f69adb2fSStanislav Kinsbursky goto out_free_lockd; 1543bd5ae928SJ. Bruce Fields retval = register_pernet_subsys(&nfsd_net_ops); 1544bd5ae928SJ. Bruce Fields if (retval < 0) 15456f6f84aaSZhang Xiaoxu goto out_free_exports; 1546b10252c7SAlexander Sverdlin retval = register_cld_notifier(); 1547b10252c7SAlexander Sverdlin if (retval) 154862fdb65eSZhang Xiaoxu goto out_free_subsys; 1549d76cc46bSDai Ngo retval = nfsd4_create_laundry_wq(); 1550d76cc46bSDai Ngo if (retval) 15516f6f84aaSZhang Xiaoxu goto out_free_cld; 15526f6f84aaSZhang Xiaoxu retval = register_filesystem(&nfsd_fs_type); 15536f6f84aaSZhang Xiaoxu if (retval) 1554d76cc46bSDai Ngo goto out_free_all; 155526808d3fSJ. Bruce Fields return 0; 155626808d3fSJ. Bruce Fields out_free_all: 15576f6f84aaSZhang Xiaoxu nfsd4_destroy_laundry_wq(); 15586f6f84aaSZhang Xiaoxu out_free_cld: 155962fdb65eSZhang Xiaoxu unregister_cld_notifier(); 156062fdb65eSZhang Xiaoxu out_free_subsys: 1561b10252c7SAlexander Sverdlin unregister_pernet_subsys(&nfsd_net_ops); 1562bd5ae928SJ. Bruce Fields out_free_exports: 15631da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15641da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1565dbf847ecSJ. Bruce Fields out_free_lockd: 15661da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1567027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 1568027690c7SJ. Bruce Fields out_free_stat: 1569d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 1570e567b98cSAmir Goldstein out_free_pnfs: 15719cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 157265178db4SBryan Schumaker out_free_slabs: 157346b25895SJ. Bruce Fields nfsd4_free_slabs(); 15741da177e4SLinus Torvalds return retval; 15751da177e4SLinus Torvalds } 15761da177e4SLinus Torvalds 15771da177e4SLinus Torvalds static void __exit exit_nfsd(void) 15781da177e4SLinus Torvalds { 15796f6f84aaSZhang Xiaoxu unregister_filesystem(&nfsd_fs_type); 1580d76cc46bSDai Ngo nfsd4_destroy_laundry_wq(); 1581b10252c7SAlexander Sverdlin unregister_cld_notifier(); 1582bd5ae928SJ. Bruce Fields unregister_pernet_subsys(&nfsd_net_ops); 1583027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 15841da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15851da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 15861da177e4SLinus Torvalds nfsd_stat_shutdown(); 15871da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1588e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 15899cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 15901da177e4SLinus Torvalds } 15911da177e4SLinus Torvalds 15921da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 15931da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 15941da177e4SLinus Torvalds module_init(init_nfsd) 15951da177e4SLinus Torvalds module_exit(exit_nfsd) 1596