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> 17b084f598SJ. Bruce Fields #include <linux/sunrpc/gss_krb5_enctypes.h> 18813fd320SJeff Layton #include <linux/sunrpc/rpc_pipe_fs.h> 19143cb494SPaul Gortmaker #include <linux/module.h> 20e8a79fb1SJ. Bruce Fields #include <linux/fsnotify.h> 211da177e4SLinus Torvalds 222ca72e17SJ. Bruce Fields #include "idmap.h" 239a74af21SBoaz Harrosh #include "nfsd.h" 249a74af21SBoaz Harrosh #include "cache.h" 25f3c7521fSBryan Schumaker #include "state.h" 267ea34ac1SJeff Layton #include "netns.h" 279cf514ccSChristoph Hellwig #include "pnfs.h" 282e6c6e4cSChuck Lever #include "filecache.h" 299a74af21SBoaz Harrosh 301da177e4SLinus Torvalds /* 31b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 321da177e4SLinus Torvalds */ 331da177e4SLinus Torvalds enum { 341da177e4SLinus Torvalds NFSD_Root = 1, 351da177e4SLinus Torvalds NFSD_List, 3620ad856eSAmir Goldstein NFSD_Export_Stats, 37e8e8753fSJ. Bruce Fields NFSD_Export_features, 381da177e4SLinus Torvalds NFSD_Fh, 394373ea84SWendy Cheng NFSD_FO_UnlockIP, 4017efa372SWendy Cheng NFSD_FO_UnlockFS, 411da177e4SLinus Torvalds NFSD_Threads, 42eed2965aSGreg Banks NFSD_Pool_Threads, 4303cf6c9fSGreg Banks NFSD_Pool_Stats, 44a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 4570c3b76cSNeilBrown NFSD_Versions, 4680212d59SNeilBrown NFSD_Ports, 47596bbe53SNeilBrown NFSD_MaxBlkSize, 485b8db00bSJeff Layton NFSD_MaxConnections, 492e6c6e4cSChuck Lever NFSD_Filecache, 50b0b0c0a2SKevin Coffman NFSD_SupportedEnctypes, 5170c3b76cSNeilBrown /* 5270c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 5370c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 5470c3b76cSNeilBrown */ 5570c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 561da177e4SLinus Torvalds NFSD_Leasetime, 57efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 580964a3d3SNeilBrown NFSD_RecoveryDir, 597f5ef2e9SJeff Layton NFSD_V4EndGrace, 6070c3b76cSNeilBrown #endif 61e8a79fb1SJ. Bruce Fields NFSD_MaxReserved 621da177e4SLinus Torvalds }; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds /* 651da177e4SLinus Torvalds * write() for these nodes. 661da177e4SLinus Torvalds */ 671da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 68b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 69b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 701da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 71eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 7270c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 7380212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 74596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 755b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 7670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 771da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 78efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 790964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 807f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 8170c3b76cSNeilBrown #endif 821da177e4SLinus Torvalds 83c2cdc2abSEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 841da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 85b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 86b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 871da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 88eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 8970c3b76cSNeilBrown [NFSD_Versions] = write_versions, 9080212d59SNeilBrown [NFSD_Ports] = write_ports, 91596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 925b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 9370c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 941da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 95efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 960964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 977f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 9870c3b76cSNeilBrown #endif 991da177e4SLinus Torvalds }; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1021da177e4SLinus Torvalds { 103496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 1041da177e4SLinus Torvalds char *data; 1051da177e4SLinus Torvalds ssize_t rv; 1061da177e4SLinus Torvalds 107e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1081da177e4SLinus Torvalds return -EINVAL; 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1111da177e4SLinus Torvalds if (IS_ERR(data)) 1121da177e4SLinus Torvalds return PTR_ERR(data); 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1158971a101SNeilBrown if (rv >= 0) { 1161da177e4SLinus Torvalds simple_transaction_set(file, rv); 1171da177e4SLinus Torvalds rv = size; 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds return rv; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1227390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1237390022dSNeilBrown { 1247390022dSNeilBrown if (! file->private_data) { 1257390022dSNeilBrown /* An attempt to read a transaction file without writing 1267390022dSNeilBrown * causes a 0-byte write so that the file can return 1277390022dSNeilBrown * state information 1287390022dSNeilBrown */ 1297390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1307390022dSNeilBrown if (rv < 0) 1317390022dSNeilBrown return rv; 1327390022dSNeilBrown } 1337390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1347390022dSNeilBrown } 1357390022dSNeilBrown 1364b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1371da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1387390022dSNeilBrown .read = nfsctl_transaction_read, 1391da177e4SLinus Torvalds .release = simple_transaction_release, 1406038f373SArnd Bergmann .llseek = default_llseek, 1411da177e4SLinus Torvalds }; 1421da177e4SLinus Torvalds 14396d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1441da177e4SLinus Torvalds { 145f2c7ea10SStanislav Kinsbursky int err; 146f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 14796d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 148f2c7ea10SStanislav Kinsbursky 149f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 150f2c7ea10SStanislav Kinsbursky if (err) 151f2c7ea10SStanislav Kinsbursky return err; 152f2c7ea10SStanislav Kinsbursky 153f2c7ea10SStanislav Kinsbursky seq = file->private_data; 154e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 155f2c7ea10SStanislav Kinsbursky return 0; 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds 15896d851c4SStanislav Kinsbursky static int exports_proc_open(struct inode *inode, struct file *file) 15996d851c4SStanislav Kinsbursky { 16096d851c4SStanislav Kinsbursky return exports_net_open(current->nsproxy->net_ns, file); 16196d851c4SStanislav Kinsbursky } 16296d851c4SStanislav Kinsbursky 16397a32539SAlexey Dobriyan static const struct proc_ops exports_proc_ops = { 16497a32539SAlexey Dobriyan .proc_open = exports_proc_open, 16597a32539SAlexey Dobriyan .proc_read = seq_read, 16697a32539SAlexey Dobriyan .proc_lseek = seq_lseek, 16797a32539SAlexey Dobriyan .proc_release = seq_release, 16896d851c4SStanislav Kinsbursky }; 16996d851c4SStanislav Kinsbursky 17096d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 17196d851c4SStanislav Kinsbursky { 17296d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 17396d851c4SStanislav Kinsbursky } 17496d851c4SStanislav Kinsbursky 17596d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 17696d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1771da177e4SLinus Torvalds .read = seq_read, 1781da177e4SLinus Torvalds .llseek = seq_lseek, 1791da177e4SLinus Torvalds .release = seq_release, 1801da177e4SLinus Torvalds }; 1811da177e4SLinus Torvalds 182e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 183e8e8753fSJ. Bruce Fields { 184e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 185e8e8753fSJ. Bruce Fields return 0; 186e8e8753fSJ. Bruce Fields } 187e8e8753fSJ. Bruce Fields 1889beeaab8SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(export_features); 189e8e8753fSJ. Bruce Fields 190b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 191b0b0c0a2SKevin Coffman static int supported_enctypes_show(struct seq_file *m, void *v) 192b0b0c0a2SKevin Coffman { 193b084f598SJ. Bruce Fields seq_printf(m, KRB5_SUPPORTED_ENCTYPES); 194b0b0c0a2SKevin Coffman return 0; 195b0b0c0a2SKevin Coffman } 196b0b0c0a2SKevin Coffman 1979beeaab8SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(supported_enctypes); 198b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 199b0b0c0a2SKevin Coffman 200828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 20103cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 20203cf6c9fSGreg Banks .read = seq_read, 20303cf6c9fSGreg Banks .llseek = seq_lseek, 204ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 20503cf6c9fSGreg Banks }; 20603cf6c9fSGreg Banks 207*64776611SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); 208a2f999a3SJeff Layton 2092e6c6e4cSChuck Lever static const struct file_operations filecache_ops = { 2102e6c6e4cSChuck Lever .open = nfsd_file_cache_stats_open, 2112e6c6e4cSChuck Lever .read = seq_read, 2122e6c6e4cSChuck Lever .llseek = seq_lseek, 2132e6c6e4cSChuck Lever .release = single_release, 2142e6c6e4cSChuck Lever }; 2152e6c6e4cSChuck Lever 2161da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 2171da177e4SLinus Torvalds /* 2181da177e4SLinus Torvalds * payload - write methods 2191da177e4SLinus Torvalds */ 2201da177e4SLinus Torvalds 221244c7d44SAl Viro static inline struct net *netns(struct file *file) 222244c7d44SAl Viro { 223244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 224244c7d44SAl Viro } 2251da177e4SLinus Torvalds 226f2453978SChuck Lever /* 227262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 228262a0982SChuck Lever * 229262a0982SChuck Lever * Experimental. 230262a0982SChuck Lever * 231262a0982SChuck Lever * Input: 232262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2334116092bSChuck Lever * presentation format IP address 234262a0982SChuck Lever * size: length of C string in @buf 235262a0982SChuck Lever * Output: 236262a0982SChuck Lever * On success: returns zero if all specified locks were released; 237262a0982SChuck Lever * returns one if one or more locks were not released 238262a0982SChuck Lever * On error: return code is negative errno value 239262a0982SChuck Lever */ 240b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2414373ea84SWendy Cheng { 2424116092bSChuck Lever struct sockaddr_storage address; 2434116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2444116092bSChuck Lever size_t salen = sizeof(address); 245367c8c7bSChuck Lever char *fo_path; 246244c7d44SAl Viro struct net *net = netns(file); 2474373ea84SWendy Cheng 2484373ea84SWendy Cheng /* sanity check */ 2494373ea84SWendy Cheng if (size == 0) 2504373ea84SWendy Cheng return -EINVAL; 2514373ea84SWendy Cheng 2524373ea84SWendy Cheng if (buf[size-1] != '\n') 2534373ea84SWendy Cheng return -EINVAL; 2544373ea84SWendy Cheng 2554373ea84SWendy Cheng fo_path = buf; 2564373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2574373ea84SWendy Cheng return -EINVAL; 2584373ea84SWendy Cheng 25911f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2604373ea84SWendy Cheng return -EINVAL; 2614373ea84SWendy Cheng 2624116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2634373ea84SWendy Cheng } 2644373ea84SWendy Cheng 265f2453978SChuck Lever /* 266262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 267262a0982SChuck Lever * 268262a0982SChuck Lever * Experimental. 269262a0982SChuck Lever * 270262a0982SChuck Lever * Input: 271262a0982SChuck Lever * buf: '\n'-terminated C string containing the 272262a0982SChuck Lever * absolute pathname of a local file system 273262a0982SChuck Lever * size: length of C string in @buf 274262a0982SChuck Lever * Output: 275262a0982SChuck Lever * On success: returns zero if all specified locks were released; 276262a0982SChuck Lever * returns one if one or more locks were not released 277262a0982SChuck Lever * On error: return code is negative errno value 278262a0982SChuck Lever */ 279b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 28017efa372SWendy Cheng { 281a63bb996SAl Viro struct path path; 28217efa372SWendy Cheng char *fo_path; 28317efa372SWendy Cheng int error; 28417efa372SWendy Cheng 28517efa372SWendy Cheng /* sanity check */ 28617efa372SWendy Cheng if (size == 0) 28717efa372SWendy Cheng return -EINVAL; 28817efa372SWendy Cheng 28917efa372SWendy Cheng if (buf[size-1] != '\n') 29017efa372SWendy Cheng return -EINVAL; 29117efa372SWendy Cheng 29217efa372SWendy Cheng fo_path = buf; 29317efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 29417efa372SWendy Cheng return -EINVAL; 29517efa372SWendy Cheng 296a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 29717efa372SWendy Cheng if (error) 29817efa372SWendy Cheng return error; 29917efa372SWendy Cheng 300262a0982SChuck Lever /* 301262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 302262a0982SChuck Lever * releasing locks on the wrong file system. 303262a0982SChuck Lever * 304262a0982SChuck Lever * For example: 305262a0982SChuck Lever * 1. Does the path refer to a directory? 306262a0982SChuck Lever * 2. Is that directory a mount point, or 307262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 308262a0982SChuck Lever */ 309d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 31017efa372SWendy Cheng 311a63bb996SAl Viro path_put(&path); 31217efa372SWendy Cheng return error; 31317efa372SWendy Cheng } 31417efa372SWendy Cheng 315f2453978SChuck Lever /* 316262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 317262a0982SChuck Lever * 318262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 319262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 320262a0982SChuck Lever * contain escape sequences. 321262a0982SChuck Lever * 322262a0982SChuck Lever * Input: 323262a0982SChuck Lever * buf: 324262a0982SChuck Lever * domain: client domain name 325262a0982SChuck Lever * path: export pathname 326262a0982SChuck Lever * maxsize: numeric maximum size of 327262a0982SChuck Lever * @buf 328262a0982SChuck Lever * size: length of C string in @buf 329262a0982SChuck Lever * Output: 330262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 331262a0982SChuck Lever * string containing a ASCII hex text version 332262a0982SChuck Lever * of the NFS file handle; 333262a0982SChuck Lever * return code is the size in bytes of the string 334262a0982SChuck Lever * On error: return code is negative errno value 335262a0982SChuck Lever */ 3361da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3371da177e4SLinus Torvalds { 3381da177e4SLinus Torvalds char *dname, *path; 3393f649ab7SKees Cook int maxsize; 3401da177e4SLinus Torvalds char *mesg = buf; 3411da177e4SLinus Torvalds int len; 3421da177e4SLinus Torvalds struct auth_domain *dom; 3431da177e4SLinus Torvalds struct knfsd_fh fh; 3441da177e4SLinus Torvalds 34587d26ea7SJ. Bruce Fields if (size == 0) 34687d26ea7SJ. Bruce Fields return -EINVAL; 34787d26ea7SJ. Bruce Fields 3481da177e4SLinus Torvalds if (buf[size-1] != '\n') 3491da177e4SLinus Torvalds return -EINVAL; 3501da177e4SLinus Torvalds buf[size-1] = 0; 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds dname = mesg; 3531da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 35454224f04SChuck Lever if (len <= 0) 35554224f04SChuck Lever return -EINVAL; 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds path = dname+len+1; 3581da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 35954224f04SChuck Lever if (len <= 0) 36054224f04SChuck Lever return -EINVAL; 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3631da177e4SLinus Torvalds if (len) 3641da177e4SLinus Torvalds return len; 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3671da177e4SLinus Torvalds return -EINVAL; 3683c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3711da177e4SLinus Torvalds return -EINVAL; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3741da177e4SLinus Torvalds dom = unix_domain_find(dname); 3751da177e4SLinus Torvalds if (!dom) 3761da177e4SLinus Torvalds return -ENOMEM; 3771da177e4SLinus Torvalds 378244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3791da177e4SLinus Torvalds auth_domain_put(dom); 3801da177e4SLinus Torvalds if (len) 3811da177e4SLinus Torvalds return len; 3821da177e4SLinus Torvalds 38354224f04SChuck Lever mesg = buf; 38454224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 385d8b26071SNeilBrown qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size); 3861da177e4SLinus Torvalds mesg[-1] = '\n'; 3871da177e4SLinus Torvalds return mesg - buf; 3881da177e4SLinus Torvalds } 3891da177e4SLinus Torvalds 390f2453978SChuck Lever /* 391262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 392262a0982SChuck Lever * 393262a0982SChuck Lever * Input: 394262a0982SChuck Lever * buf: ignored 395262a0982SChuck Lever * size: zero 396262a0982SChuck Lever * Output: 397262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 398262a0982SChuck Lever * string numeric value representing the number of 399262a0982SChuck Lever * running NFSD threads; 400262a0982SChuck Lever * return code is the size in bytes of the string 401262a0982SChuck Lever * On error: return code is zero 402262a0982SChuck Lever * 403262a0982SChuck Lever * OR 404262a0982SChuck Lever * 405262a0982SChuck Lever * Input: 406262a0982SChuck Lever * buf: C string containing an unsigned 407262a0982SChuck Lever * integer value representing the 408262a0982SChuck Lever * number of NFSD threads to start 409262a0982SChuck Lever * size: non-zero length of C string in @buf 410262a0982SChuck Lever * Output: 411262a0982SChuck Lever * On success: NFS service is started; 412262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 413262a0982SChuck Lever * string numeric value representing the number of 414262a0982SChuck Lever * running NFSD threads; 415262a0982SChuck Lever * return code is the size in bytes of the string 416262a0982SChuck Lever * On error: return code is zero or a negative errno value 417262a0982SChuck Lever */ 4181da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 4191da177e4SLinus Torvalds { 4201da177e4SLinus Torvalds char *mesg = buf; 4211da177e4SLinus Torvalds int rv; 422244c7d44SAl Viro struct net *net = netns(file); 423d41a9417SStanislav Kinsbursky 4241da177e4SLinus Torvalds if (size > 0) { 4251da177e4SLinus Torvalds int newthreads; 4261da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4271da177e4SLinus Torvalds if (rv) 4281da177e4SLinus Torvalds return rv; 4291da177e4SLinus Torvalds if (newthreads < 0) 4301da177e4SLinus Torvalds return -EINVAL; 4314df493a2STrond Myklebust rv = nfsd_svc(newthreads, net, file->f_cred); 43282e12fe9SNeilBrown if (rv < 0) 4331da177e4SLinus Torvalds return rv; 43482e12fe9SNeilBrown } else 4359dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 436e06b6405SChuck Lever 43782e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 440f2453978SChuck Lever /* 441262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 442262a0982SChuck Lever * 443262a0982SChuck Lever * Input: 444262a0982SChuck Lever * buf: ignored 445262a0982SChuck Lever * size: zero 446262a0982SChuck Lever * 447262a0982SChuck Lever * OR 448262a0982SChuck Lever * 449262a0982SChuck Lever * Input: 450262a0982SChuck Lever * buf: C string containing whitespace- 451262a0982SChuck Lever * separated unsigned integer values 452262a0982SChuck Lever * representing the number of NFSD 453262a0982SChuck Lever * threads to start in each pool 454262a0982SChuck Lever * size: non-zero length of C string in @buf 455262a0982SChuck Lever * Output: 456262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 457262a0982SChuck Lever * string containing integer values representing the 458262a0982SChuck Lever * number of NFSD threads in each pool; 459262a0982SChuck Lever * return code is the size in bytes of the string 460262a0982SChuck Lever * On error: return code is zero or a negative errno value 461262a0982SChuck Lever */ 462eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 463eed2965aSGreg Banks { 464eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 465eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 466eed2965aSGreg Banks */ 467eed2965aSGreg Banks char *mesg = buf; 468eed2965aSGreg Banks int i; 469eed2965aSGreg Banks int rv; 470eed2965aSGreg Banks int len; 471bedbdd8bSNeil Brown int npools; 472eed2965aSGreg Banks int *nthreads; 473244c7d44SAl Viro struct net *net = netns(file); 474eed2965aSGreg Banks 475bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4769dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 477eed2965aSGreg Banks if (npools == 0) { 478eed2965aSGreg Banks /* 479eed2965aSGreg Banks * NFS is shut down. The admin can start it by 480eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 481eed2965aSGreg Banks * file, sorry. Report zero threads. 482eed2965aSGreg Banks */ 483bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 484eed2965aSGreg Banks strcpy(buf, "0\n"); 485eed2965aSGreg Banks return strlen(buf); 486eed2965aSGreg Banks } 487eed2965aSGreg Banks 488eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 489bedbdd8bSNeil Brown rv = -ENOMEM; 490eed2965aSGreg Banks if (nthreads == NULL) 491bedbdd8bSNeil Brown goto out_free; 492eed2965aSGreg Banks 493eed2965aSGreg Banks if (size > 0) { 494eed2965aSGreg Banks for (i = 0; i < npools; i++) { 495eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 496eed2965aSGreg Banks if (rv == -ENOENT) 497eed2965aSGreg Banks break; /* fewer numbers than pools */ 498eed2965aSGreg Banks if (rv) 499eed2965aSGreg Banks goto out_free; /* syntax error */ 500eed2965aSGreg Banks rv = -EINVAL; 501eed2965aSGreg Banks if (nthreads[i] < 0) 502eed2965aSGreg Banks goto out_free; 503eed2965aSGreg Banks } 5043938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 505eed2965aSGreg Banks if (rv) 506eed2965aSGreg Banks goto out_free; 507eed2965aSGreg Banks } 508eed2965aSGreg Banks 5099dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 510eed2965aSGreg Banks if (rv) 511eed2965aSGreg Banks goto out_free; 512eed2965aSGreg Banks 513eed2965aSGreg Banks mesg = buf; 514eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 515eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 516eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 517eed2965aSGreg Banks len = strlen(mesg); 518eed2965aSGreg Banks size -= len; 519eed2965aSGreg Banks mesg += len; 520eed2965aSGreg Banks } 521413d63d7SJ. Bruce Fields rv = mesg - buf; 522eed2965aSGreg Banks out_free: 523eed2965aSGreg Banks kfree(nthreads); 524bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 525eed2965aSGreg Banks return rv; 526eed2965aSGreg Banks } 527eed2965aSGreg Banks 528ff7d1179STrond Myklebust static ssize_t 529e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 530e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 531ff7d1179STrond Myklebust { 532abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 533e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 534ff7d1179STrond Myklebust 535abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 536e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 537ff7d1179STrond Myklebust supported = false; 538abcb4dacSNeilBrown if (minor == 0 && supported) 539abcb4dacSNeilBrown /* 540abcb4dacSNeilBrown * special case for backward compatability. 541abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 542abcb4dacSNeilBrown * +4, unless -4.0 is present. 543abcb4dacSNeilBrown */ 544abcb4dacSNeilBrown return 0; 545ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 546ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 547ff7d1179STrond Myklebust } 548ff7d1179STrond Myklebust 5493dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 55070c3b76cSNeilBrown { 55170c3b76cSNeilBrown char *mesg = buf; 5528daf220aSBenny Halevy char *vers, *minorp, sign; 553261758b5SChuck Lever int len, num, remaining; 55470c3b76cSNeilBrown ssize_t tlen = 0; 55570c3b76cSNeilBrown char *sep; 556244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 55770c3b76cSNeilBrown 55870c3b76cSNeilBrown if (size>0) { 5599dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5606658d3a7SNeilBrown /* Cannot change versions without updating 5619dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5626658d3a7SNeilBrown * rq_argp and rq_resp 5636658d3a7SNeilBrown */ 56470c3b76cSNeilBrown return -EBUSY; 56570c3b76cSNeilBrown if (buf[size-1] != '\n') 56670c3b76cSNeilBrown return -EINVAL; 56770c3b76cSNeilBrown buf[size-1] = 0; 56870c3b76cSNeilBrown 56970c3b76cSNeilBrown vers = mesg; 57070c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 57170c3b76cSNeilBrown if (len <= 0) return -EINVAL; 57270c3b76cSNeilBrown do { 573d3635ff0STrond Myklebust enum vers_op cmd; 574abcb4dacSNeilBrown unsigned minor; 57570c3b76cSNeilBrown sign = *vers; 57670c3b76cSNeilBrown if (sign == '+' || sign == '-') 5778daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 57870c3b76cSNeilBrown else 5798daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5808daf220aSBenny Halevy if (*minorp == '.') { 581ff89be87SJ. Bruce Fields if (num != 4) 5828daf220aSBenny Halevy return -EINVAL; 583e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5848daf220aSBenny Halevy return -EINVAL; 585abcb4dacSNeilBrown } 586abcb4dacSNeilBrown 587d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 58870c3b76cSNeilBrown switch(num) { 58970c3b76cSNeilBrown case 2: 59070c3b76cSNeilBrown case 3: 591e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 592d3635ff0STrond Myklebust break; 59370c3b76cSNeilBrown case 4: 594abcb4dacSNeilBrown if (*minorp == '.') { 595e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 596abcb4dacSNeilBrown return -EINVAL; 597e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 598abcb4dacSNeilBrown /* 599abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 600abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 601abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 602abcb4dacSNeilBrown */ 603abcb4dacSNeilBrown minor = 0; 604e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 605abcb4dacSNeilBrown minor++; 606abcb4dacSNeilBrown } 60770c3b76cSNeilBrown break; 60870c3b76cSNeilBrown default: 60970c3b76cSNeilBrown return -EINVAL; 61070c3b76cSNeilBrown } 61170c3b76cSNeilBrown vers += len + 1; 61270c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 61370c3b76cSNeilBrown /* If all get turned off, turn them back on, as 61470c3b76cSNeilBrown * having no versions is BAD 61570c3b76cSNeilBrown */ 616e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 61770c3b76cSNeilBrown } 618261758b5SChuck Lever 61970c3b76cSNeilBrown /* Now write current state into reply buffer */ 62070c3b76cSNeilBrown sep = ""; 621261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 622ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 623abcb4dacSNeilBrown int minor; 624e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 625e35659f1SNeilBrown continue; 626abcb4dacSNeilBrown 627abcb4dacSNeilBrown minor = -1; 628ff7d1179STrond Myklebust do { 629e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 630ff7d1179STrond Myklebust sep, num, minor); 631818f2f57SDan Carpenter if (len >= remaining) 632ff7d1179STrond Myklebust goto out; 633261758b5SChuck Lever remaining -= len; 634261758b5SChuck Lever buf += len; 635261758b5SChuck Lever tlen += len; 636ff7d1179STrond Myklebust minor++; 637abcb4dacSNeilBrown if (len) 638ff7d1179STrond Myklebust sep = " "; 639ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 640261758b5SChuck Lever } 641ff7d1179STrond Myklebust out: 642261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 643818f2f57SDan Carpenter if (len >= remaining) 644261758b5SChuck Lever return -EINVAL; 645261758b5SChuck Lever return tlen + len; 64670c3b76cSNeilBrown } 64770c3b76cSNeilBrown 648f2453978SChuck Lever /* 649262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 650262a0982SChuck Lever * 651262a0982SChuck Lever * Input: 652262a0982SChuck Lever * buf: ignored 653262a0982SChuck Lever * size: zero 654262a0982SChuck Lever * Output: 655262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 656262a0982SChuck Lever * string containing positive or negative integer 657262a0982SChuck Lever * values representing the current status of each 658262a0982SChuck Lever * protocol version; 659262a0982SChuck Lever * return code is the size in bytes of the string 660262a0982SChuck Lever * On error: return code is zero or a negative errno value 661262a0982SChuck Lever * 662262a0982SChuck Lever * OR 663262a0982SChuck Lever * 664262a0982SChuck Lever * Input: 665262a0982SChuck Lever * buf: C string containing whitespace- 666262a0982SChuck Lever * separated positive or negative 667262a0982SChuck Lever * integer values representing NFS 668262a0982SChuck Lever * protocol versions to enable ("+n") 669262a0982SChuck Lever * or disable ("-n") 670262a0982SChuck Lever * size: non-zero length of C string in @buf 671262a0982SChuck Lever * Output: 672262a0982SChuck Lever * On success: status of zero or more protocol versions has 673262a0982SChuck Lever * been updated; passed-in buffer filled with 674262a0982SChuck Lever * '\n'-terminated C string containing positive 675262a0982SChuck Lever * or negative integer values representing the 676262a0982SChuck Lever * current status of each protocol version; 677262a0982SChuck Lever * return code is the size in bytes of the string 678262a0982SChuck Lever * On error: return code is zero or a negative errno value 679262a0982SChuck Lever */ 6803dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6813dd98a3bSJeff Layton { 6823dd98a3bSJeff Layton ssize_t rv; 6833dd98a3bSJeff Layton 6843dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6853dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6863dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6873dd98a3bSJeff Layton return rv; 6883dd98a3bSJeff Layton } 6893dd98a3bSJeff Layton 6904cd5dc75SChuck Lever /* 6910a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 6920a5372d8SChuck Lever * transports. 6930a5372d8SChuck Lever */ 6949dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 6950a5372d8SChuck Lever { 6969dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6979dd9845fSStanislav Kinsbursky 6989dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 6990a5372d8SChuck Lever return 0; 7009dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 7010a5372d8SChuck Lever } 7020a5372d8SChuck Lever 7030a5372d8SChuck Lever /* 7040b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 7050b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 7060b7c2f6fSChuck Lever * nfsd listener. 7070b7c2f6fSChuck Lever */ 7084df493a2STrond Myklebust static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 7090b7c2f6fSChuck Lever { 7100b7c2f6fSChuck Lever char *mesg = buf; 7110b7c2f6fSChuck Lever int fd, err; 7129dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7130b7c2f6fSChuck Lever 7140b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 7150b7c2f6fSChuck Lever if (err != 0 || fd < 0) 7160b7c2f6fSChuck Lever return -EINVAL; 7170b7c2f6fSChuck Lever 71830646394SStanislav Kinsbursky if (svc_alien_sock(net, fd)) { 71930646394SStanislav Kinsbursky printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); 72030646394SStanislav Kinsbursky return -EINVAL; 72130646394SStanislav Kinsbursky } 72230646394SStanislav Kinsbursky 7236777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7240b7c2f6fSChuck Lever if (err != 0) 7250b7c2f6fSChuck Lever return err; 7260b7c2f6fSChuck Lever 7274df493a2STrond Myklebust err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 728ea068badSChuck Lever 729ec52361dSNeilBrown if (err >= 0 && 730ec52361dSNeilBrown !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 731ec52361dSNeilBrown svc_get(nn->nfsd_serv); 732ec52361dSNeilBrown 733ec52361dSNeilBrown nfsd_put(net); 734ea068badSChuck Lever return err; 7350b7c2f6fSChuck Lever } 7360b7c2f6fSChuck Lever 7370b7c2f6fSChuck Lever /* 7384eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 7394eb68c26SChuck Lever * a port number. 7404eb68c26SChuck Lever */ 7414df493a2STrond Myklebust static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 7424eb68c26SChuck Lever { 7434eb68c26SChuck Lever char transport[16]; 74437498292SChuck Lever struct svc_xprt *xprt; 7454eb68c26SChuck Lever int port, err; 7469dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7474eb68c26SChuck Lever 748a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7494eb68c26SChuck Lever return -EINVAL; 7504eb68c26SChuck Lever 7514be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7524eb68c26SChuck Lever return -EINVAL; 7534eb68c26SChuck Lever 7546777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7554eb68c26SChuck Lever if (err != 0) 7564eb68c26SChuck Lever return err; 7574eb68c26SChuck Lever 758352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7594df493a2STrond Myklebust PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 76068717908SChuck Lever if (err < 0) 76137498292SChuck Lever goto out_err; 76237498292SChuck Lever 763352ad314SChuck Lever err = svc_xprt_create(nn->nfsd_serv, transport, net, 7644df493a2STrond Myklebust PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 76537498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 76637498292SChuck Lever goto out_close; 7670cd14a06SJeff Layton 768ec52361dSNeilBrown if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 769ec52361dSNeilBrown svc_get(nn->nfsd_serv); 770ec52361dSNeilBrown 771ec52361dSNeilBrown nfsd_put(net); 7724eb68c26SChuck Lever return 0; 77337498292SChuck Lever out_close: 7749dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 77537498292SChuck Lever if (xprt != NULL) { 7764355d767SChuck Lever svc_xprt_close(xprt); 77737498292SChuck Lever svc_xprt_put(xprt); 77837498292SChuck Lever } 77937498292SChuck Lever out_err: 7808c62d127SNeilBrown nfsd_put(net); 78137498292SChuck Lever return err; 7824eb68c26SChuck Lever } 7834eb68c26SChuck Lever 78408160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 78508160352SStanislav Kinsbursky struct net *net) 78680212d59SNeilBrown { 7870a5372d8SChuck Lever if (size == 0) 7889dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 7890b7c2f6fSChuck Lever 7900b7c2f6fSChuck Lever if (isdigit(buf[0])) 7914df493a2STrond Myklebust return __write_ports_addfd(buf, net, file->f_cred); 79282d56591SChuck Lever 7934eb68c26SChuck Lever if (isalpha(buf[0])) 7944df493a2STrond Myklebust return __write_ports_addxprt(buf, net, file->f_cred); 7954cd5dc75SChuck Lever 796b41b66d6SNeilBrown return -EINVAL; 797b41b66d6SNeilBrown } 79880212d59SNeilBrown 799f2453978SChuck Lever /* 800262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 801262a0982SChuck Lever * 802262a0982SChuck Lever * Input: 803262a0982SChuck Lever * buf: ignored 804262a0982SChuck Lever * size: zero 805262a0982SChuck Lever * Output: 806262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 807262a0982SChuck Lever * string containing a whitespace-separated list of 808262a0982SChuck Lever * named NFSD listeners; 809262a0982SChuck Lever * return code is the size in bytes of the string 810262a0982SChuck Lever * On error: return code is zero or a negative errno value 811262a0982SChuck Lever * 812262a0982SChuck Lever * OR 813262a0982SChuck Lever * 814262a0982SChuck Lever * Input: 815262a0982SChuck Lever * buf: C string containing an unsigned 816262a0982SChuck Lever * integer value representing a bound 817262a0982SChuck Lever * but unconnected socket that is to be 818c71206a7SChuck Lever * used as an NFSD listener; listen(3) 819c71206a7SChuck Lever * must be called for a SOCK_STREAM 820c71206a7SChuck Lever * socket, otherwise it is ignored 821262a0982SChuck Lever * size: non-zero length of C string in @buf 822262a0982SChuck Lever * Output: 823262a0982SChuck Lever * On success: NFS service is started; 824262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 825262a0982SChuck Lever * string containing a unique alphanumeric name of 826262a0982SChuck Lever * the listener; 827262a0982SChuck Lever * return code is the size in bytes of the string 828262a0982SChuck Lever * On error: return code is a negative errno value 829262a0982SChuck Lever * 830262a0982SChuck Lever * OR 831262a0982SChuck Lever * 832262a0982SChuck Lever * Input: 833262a0982SChuck Lever * buf: C string containing a transport 834262a0982SChuck Lever * name and an unsigned integer value 835262a0982SChuck Lever * representing the port to listen on, 836262a0982SChuck Lever * separated by whitespace 837262a0982SChuck Lever * size: non-zero length of C string in @buf 838262a0982SChuck Lever * Output: 839262a0982SChuck Lever * On success: returns zero; NFS service is started 840262a0982SChuck Lever * On error: return code is a negative errno value 841262a0982SChuck Lever */ 842bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 843bedbdd8bSNeil Brown { 844bedbdd8bSNeil Brown ssize_t rv; 8453dd98a3bSJeff Layton 846bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 847244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 848bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 849bedbdd8bSNeil Brown return rv; 850bedbdd8bSNeil Brown } 851bedbdd8bSNeil Brown 852bedbdd8bSNeil Brown 853596bbe53SNeilBrown int nfsd_max_blksize; 854596bbe53SNeilBrown 855f2453978SChuck Lever /* 856262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 857262a0982SChuck Lever * 858262a0982SChuck Lever * Input: 859262a0982SChuck Lever * buf: ignored 860262a0982SChuck Lever * size: zero 861262a0982SChuck Lever * 862262a0982SChuck Lever * OR 863262a0982SChuck Lever * 864262a0982SChuck Lever * Input: 865262a0982SChuck Lever * buf: C string containing an unsigned 866262a0982SChuck Lever * integer value representing the new 867262a0982SChuck Lever * NFS blksize 868262a0982SChuck Lever * size: non-zero length of C string in @buf 869262a0982SChuck Lever * Output: 870262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 871262a0982SChuck Lever * containing numeric value of the current NFS blksize 872262a0982SChuck Lever * setting; 873262a0982SChuck Lever * return code is the size in bytes of the string 874262a0982SChuck Lever * On error: return code is zero or a negative errno value 875262a0982SChuck Lever */ 876596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 877596bbe53SNeilBrown { 878596bbe53SNeilBrown char *mesg = buf; 879244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8809dd9845fSStanislav Kinsbursky 881596bbe53SNeilBrown if (size > 0) { 882596bbe53SNeilBrown int bsize; 883596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 884596bbe53SNeilBrown if (rv) 885596bbe53SNeilBrown return rv; 886596bbe53SNeilBrown /* force bsize into allowed range and 887596bbe53SNeilBrown * required alignment. 888596bbe53SNeilBrown */ 8893c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 8903c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 891596bbe53SNeilBrown bsize &= ~(1024-1); 892bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 8939dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 894bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 895596bbe53SNeilBrown return -EBUSY; 896596bbe53SNeilBrown } 897596bbe53SNeilBrown nfsd_max_blksize = bsize; 898bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 899596bbe53SNeilBrown } 900e06b6405SChuck Lever 901e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 902e06b6405SChuck Lever nfsd_max_blksize); 903596bbe53SNeilBrown } 904596bbe53SNeilBrown 905f2453978SChuck Lever /* 9065b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 9075b8db00bSJeff Layton * 9085b8db00bSJeff Layton * Input: 9095b8db00bSJeff Layton * buf: ignored 9105b8db00bSJeff Layton * size: zero 9115b8db00bSJeff Layton * OR 9125b8db00bSJeff Layton * 9135b8db00bSJeff Layton * Input: 9145b8db00bSJeff Layton * buf: C string containing an unsigned 9155b8db00bSJeff Layton * integer value representing the new 9165b8db00bSJeff Layton * number of max connections 9175b8db00bSJeff Layton * size: non-zero length of C string in @buf 9185b8db00bSJeff Layton * Output: 9195b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9205b8db00bSJeff Layton * containing numeric value of max_connections setting 9215b8db00bSJeff Layton * for this net namespace; 9225b8db00bSJeff Layton * return code is the size in bytes of the string 9235b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9245b8db00bSJeff Layton */ 9255b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9265b8db00bSJeff Layton { 9275b8db00bSJeff Layton char *mesg = buf; 928244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9295b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9305b8db00bSJeff Layton 9315b8db00bSJeff Layton if (size > 0) { 9325b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9335b8db00bSJeff Layton 9345b8db00bSJeff Layton if (rv) 9355b8db00bSJeff Layton return rv; 9365b8db00bSJeff Layton nn->max_connections = maxconn; 9375b8db00bSJeff Layton } 9385b8db00bSJeff Layton 9395b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9405b8db00bSJeff Layton } 9415b8db00bSJeff Layton 94270c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9439dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 94420b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 9451da177e4SLinus Torvalds { 9461da177e4SLinus Torvalds char *mesg = buf; 947f0135740SJ. Bruce Fields int rv, i; 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds if (size > 0) { 9509dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9513dd98a3bSJeff Layton return -EBUSY; 952f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9531da177e4SLinus Torvalds if (rv) 9541da177e4SLinus Torvalds return rv; 955e7b184f1SJ. Bruce Fields /* 956e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 957e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 958e7b184f1SJ. Bruce Fields * extremes are: 959e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 960e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 961e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 962e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 963e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 964e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 965e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 966e7b184f1SJ. Bruce Fields */ 967f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9681da177e4SLinus Torvalds return -EINVAL; 969f0135740SJ. Bruce Fields *time = i; 9701da177e4SLinus Torvalds } 971e06b6405SChuck Lever 97220b7d86fSArnd Bergmann return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); 973f0135740SJ. Bruce Fields } 974f0135740SJ. Bruce Fields 9759dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 97620b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 977f0135740SJ. Bruce Fields { 978f0135740SJ. Bruce Fields ssize_t rv; 979f0135740SJ. Bruce Fields 980f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9819dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 982f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 983f0135740SJ. Bruce Fields return rv; 9841da177e4SLinus Torvalds } 9851da177e4SLinus Torvalds 986f2453978SChuck Lever /* 987262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 988262a0982SChuck Lever * 989262a0982SChuck Lever * Input: 990262a0982SChuck Lever * buf: ignored 991262a0982SChuck Lever * size: zero 992262a0982SChuck Lever * 993262a0982SChuck Lever * OR 994262a0982SChuck Lever * 995262a0982SChuck Lever * Input: 996262a0982SChuck Lever * buf: C string containing an unsigned 997262a0982SChuck Lever * integer value representing the new 998262a0982SChuck Lever * NFSv4 lease expiry time 999262a0982SChuck Lever * size: non-zero length of C string in @buf 1000262a0982SChuck Lever * Output: 1001262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1002262a0982SChuck Lever * string containing unsigned integer value of the 1003262a0982SChuck Lever * current lease expiry time; 1004262a0982SChuck Lever * return code is the size in bytes of the string 1005262a0982SChuck Lever * On error: return code is zero or a negative errno value 1006262a0982SChuck Lever */ 10073dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 10083dd98a3bSJeff Layton { 1009244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10109dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 10113dd98a3bSJeff Layton } 10123dd98a3bSJeff Layton 1013f2453978SChuck Lever /* 1014efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1015efc4bb4fSJ. Bruce Fields * 1016efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1017efc4bb4fSJ. Bruce Fields * 1018efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1019efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1020efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1021efc4bb4fSJ. Bruce Fields * anyway.) 1022efc4bb4fSJ. Bruce Fields */ 1023efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1024efc4bb4fSJ. Bruce Fields { 1025244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10269dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1027efc4bb4fSJ. Bruce Fields } 1028efc4bb4fSJ. Bruce Fields 10299dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10309dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10310964a3d3SNeilBrown { 10320964a3d3SNeilBrown char *mesg = buf; 10330964a3d3SNeilBrown char *recdir; 10340964a3d3SNeilBrown int len, status; 10350964a3d3SNeilBrown 10363dd98a3bSJeff Layton if (size > 0) { 10379dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10383dd98a3bSJeff Layton return -EBUSY; 10393dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10400964a3d3SNeilBrown return -EINVAL; 10410964a3d3SNeilBrown buf[size-1] = 0; 10420964a3d3SNeilBrown 10430964a3d3SNeilBrown recdir = mesg; 10440964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10450964a3d3SNeilBrown if (len <= 0) 10460964a3d3SNeilBrown return -EINVAL; 10470964a3d3SNeilBrown 10480964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 104969049961SAndi Kleen if (status) 105069049961SAndi Kleen return status; 10513dd98a3bSJeff Layton } 10523d72ab8fSChuck Lever 10533d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10543d72ab8fSChuck Lever nfs4_recoverydir()); 10550964a3d3SNeilBrown } 10563dd98a3bSJeff Layton 1057f2453978SChuck Lever /* 1058262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1059262a0982SChuck Lever * 1060262a0982SChuck Lever * Input: 1061262a0982SChuck Lever * buf: ignored 1062262a0982SChuck Lever * size: zero 1063262a0982SChuck Lever * 1064262a0982SChuck Lever * OR 1065262a0982SChuck Lever * 1066262a0982SChuck Lever * Input: 1067262a0982SChuck Lever * buf: C string containing the pathname 1068262a0982SChuck Lever * of the directory on a local file 1069262a0982SChuck Lever * system containing permanent NFSv4 1070262a0982SChuck Lever * recovery data 1071262a0982SChuck Lever * size: non-zero length of C string in @buf 1072262a0982SChuck Lever * Output: 1073262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1074262a0982SChuck Lever * containing the current recovery pathname setting; 1075262a0982SChuck Lever * return code is the size in bytes of the string 1076262a0982SChuck Lever * On error: return code is zero or a negative errno value 1077262a0982SChuck Lever */ 10783dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10793dd98a3bSJeff Layton { 10803dd98a3bSJeff Layton ssize_t rv; 1081244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10823dd98a3bSJeff Layton 10833dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10849dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10853dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10863dd98a3bSJeff Layton return rv; 10873dd98a3bSJeff Layton } 10883dd98a3bSJeff Layton 1089f2453978SChuck Lever /* 10907f5ef2e9SJeff Layton * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 10917f5ef2e9SJeff Layton * 10927f5ef2e9SJeff Layton * Input: 10937f5ef2e9SJeff Layton * buf: ignored 10947f5ef2e9SJeff Layton * size: zero 10957f5ef2e9SJeff Layton * OR 10967f5ef2e9SJeff Layton * 10977f5ef2e9SJeff Layton * Input: 10987f5ef2e9SJeff Layton * buf: any value 10997f5ef2e9SJeff Layton * size: non-zero length of C string in @buf 11007f5ef2e9SJeff Layton * Output: 11017f5ef2e9SJeff Layton * passed-in buffer filled with "Y" or "N" with a newline 11027f5ef2e9SJeff Layton * and NULL-terminated C string. This indicates whether 11037f5ef2e9SJeff Layton * the grace period has ended in the current net 11047f5ef2e9SJeff Layton * namespace. Return code is the size in bytes of the 11057f5ef2e9SJeff Layton * string. Writing a string that starts with 'Y', 'y', or 11067f5ef2e9SJeff Layton * '1' to the file will end the grace period for nfsd's v4 11077f5ef2e9SJeff Layton * lock manager. 11087f5ef2e9SJeff Layton */ 11097f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 11107f5ef2e9SJeff Layton { 1111244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 11127f5ef2e9SJeff Layton 11137f5ef2e9SJeff Layton if (size > 0) { 11147f5ef2e9SJeff Layton switch(buf[0]) { 11157f5ef2e9SJeff Layton case 'Y': 11167f5ef2e9SJeff Layton case 'y': 11177f5ef2e9SJeff Layton case '1': 1118dd838821SYihao Wu if (!nn->nfsd_serv) 111962a063b8SJ. Bruce Fields return -EBUSY; 11207f5ef2e9SJeff Layton nfsd4_end_grace(nn); 11217f5ef2e9SJeff Layton break; 11227f5ef2e9SJeff Layton default: 11237f5ef2e9SJeff Layton return -EINVAL; 11247f5ef2e9SJeff Layton } 11257f5ef2e9SJeff Layton } 11267f5ef2e9SJeff Layton 11277f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 11287f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 11297f5ef2e9SJeff Layton } 11307f5ef2e9SJeff Layton 113170c3b76cSNeilBrown #endif 11320964a3d3SNeilBrown 11331da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11341da177e4SLinus Torvalds /* 11351da177e4SLinus Torvalds * populating the filesystem. 11361da177e4SLinus Torvalds */ 11371da177e4SLinus Torvalds 1138e8a79fb1SJ. Bruce Fields /* Basically copying rpc_get_inode. */ 1139e8a79fb1SJ. Bruce Fields static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) 1140e8a79fb1SJ. Bruce Fields { 1141e8a79fb1SJ. Bruce Fields struct inode *inode = new_inode(sb); 1142e8a79fb1SJ. Bruce Fields if (!inode) 1143e8a79fb1SJ. Bruce Fields return NULL; 1144e8a79fb1SJ. Bruce Fields /* Following advice from simple_fill_super documentation: */ 1145e8a79fb1SJ. Bruce Fields inode->i_ino = iunique(sb, NFSD_MaxReserved); 1146e8a79fb1SJ. Bruce Fields inode->i_mode = mode; 1147e8a79fb1SJ. Bruce Fields inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 1148e8a79fb1SJ. Bruce Fields switch (mode & S_IFMT) { 1149e8a79fb1SJ. Bruce Fields case S_IFDIR: 1150e8a79fb1SJ. Bruce Fields inode->i_fop = &simple_dir_operations; 1151e8a79fb1SJ. Bruce Fields inode->i_op = &simple_dir_inode_operations; 1152e8a79fb1SJ. Bruce Fields inc_nlink(inode); 115376c50eb7SGustavo A. R. Silva break; 1154e8a79fb1SJ. Bruce Fields default: 1155e8a79fb1SJ. Bruce Fields break; 1156e8a79fb1SJ. Bruce Fields } 1157e8a79fb1SJ. Bruce Fields return inode; 1158e8a79fb1SJ. Bruce Fields } 1159e8a79fb1SJ. Bruce Fields 1160bebd6997SJ. Bruce Fields static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) 1161e8a79fb1SJ. Bruce Fields { 1162e8a79fb1SJ. Bruce Fields struct inode *inode; 1163e8a79fb1SJ. Bruce Fields 1164e8a79fb1SJ. Bruce Fields inode = nfsd_get_inode(dir->i_sb, mode); 1165e8a79fb1SJ. Bruce Fields if (!inode) 1166e8a79fb1SJ. Bruce Fields return -ENOMEM; 1167bebd6997SJ. Bruce Fields if (ncl) { 1168bebd6997SJ. Bruce Fields inode->i_private = ncl; 1169bebd6997SJ. Bruce Fields kref_get(&ncl->cl_ref); 1170bebd6997SJ. Bruce Fields } 1171e8a79fb1SJ. Bruce Fields d_add(dentry, inode); 1172e8a79fb1SJ. Bruce Fields inc_nlink(dir); 1173e8a79fb1SJ. Bruce Fields fsnotify_mkdir(dir, dentry); 1174e8a79fb1SJ. Bruce Fields return 0; 1175e8a79fb1SJ. Bruce Fields } 1176e8a79fb1SJ. Bruce Fields 1177e8a79fb1SJ. Bruce Fields static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) 1178e8a79fb1SJ. Bruce Fields { 1179e8a79fb1SJ. Bruce Fields struct inode *dir = parent->d_inode; 1180e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1181e8a79fb1SJ. Bruce Fields int ret = -ENOMEM; 1182e8a79fb1SJ. Bruce Fields 1183e8a79fb1SJ. Bruce Fields inode_lock(dir); 1184e8a79fb1SJ. Bruce Fields dentry = d_alloc_name(parent, name); 1185e8a79fb1SJ. Bruce Fields if (!dentry) 1186e8a79fb1SJ. Bruce Fields goto out_err; 1187bebd6997SJ. Bruce Fields ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); 1188e8a79fb1SJ. Bruce Fields if (ret) 1189e8a79fb1SJ. Bruce Fields goto out_err; 1190e8a79fb1SJ. Bruce Fields out: 1191e8a79fb1SJ. Bruce Fields inode_unlock(dir); 1192e8a79fb1SJ. Bruce Fields return dentry; 1193e8a79fb1SJ. Bruce Fields out_err: 1194d6846bfbSTetsuo Handa dput(dentry); 1195e8a79fb1SJ. Bruce Fields dentry = ERR_PTR(ret); 1196e8a79fb1SJ. Bruce Fields goto out; 1197e8a79fb1SJ. Bruce Fields } 1198e8a79fb1SJ. Bruce Fields 119997ad4031SJ. Bruce Fields static void clear_ncl(struct inode *inode) 1200e8a79fb1SJ. Bruce Fields { 120197ad4031SJ. Bruce Fields struct nfsdfs_client *ncl = inode->i_private; 120297ad4031SJ. Bruce Fields 120397ad4031SJ. Bruce Fields inode->i_private = NULL; 120497ad4031SJ. Bruce Fields kref_put(&ncl->cl_ref, ncl->cl_release); 120597ad4031SJ. Bruce Fields } 120697ad4031SJ. Bruce Fields 1207b78fa45dSYueHaibing static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) 120897ad4031SJ. Bruce Fields { 120997ad4031SJ. Bruce Fields struct nfsdfs_client *nc = inode->i_private; 121097ad4031SJ. Bruce Fields 121197ad4031SJ. Bruce Fields if (nc) 121297ad4031SJ. Bruce Fields kref_get(&nc->cl_ref); 121397ad4031SJ. Bruce Fields return nc; 121497ad4031SJ. Bruce Fields } 121597ad4031SJ. Bruce Fields 121697ad4031SJ. Bruce Fields struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) 121797ad4031SJ. Bruce Fields { 121897ad4031SJ. Bruce Fields struct nfsdfs_client *nc; 121997ad4031SJ. Bruce Fields 1220dc46bba7SJ. Bruce Fields inode_lock_shared(inode); 122197ad4031SJ. Bruce Fields nc = __get_nfsdfs_client(inode); 1222dc46bba7SJ. Bruce Fields inode_unlock_shared(inode); 122397ad4031SJ. Bruce Fields return nc; 122497ad4031SJ. Bruce Fields } 122597ad4031SJ. Bruce Fields /* from __rpc_unlink */ 122697ad4031SJ. Bruce Fields static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) 122797ad4031SJ. Bruce Fields { 122897ad4031SJ. Bruce Fields int ret; 122997ad4031SJ. Bruce Fields 123097ad4031SJ. Bruce Fields clear_ncl(d_inode(dentry)); 123197ad4031SJ. Bruce Fields dget(dentry); 123297ad4031SJ. Bruce Fields ret = simple_unlink(dir, dentry); 123329044daeSAmir Goldstein d_drop(dentry); 123429044daeSAmir Goldstein fsnotify_unlink(dir, dentry); 123597ad4031SJ. Bruce Fields dput(dentry); 123697ad4031SJ. Bruce Fields WARN_ON_ONCE(ret); 123797ad4031SJ. Bruce Fields } 123897ad4031SJ. Bruce Fields 123997ad4031SJ. Bruce Fields static void nfsdfs_remove_files(struct dentry *root) 124097ad4031SJ. Bruce Fields { 124197ad4031SJ. Bruce Fields struct dentry *dentry, *tmp; 124297ad4031SJ. Bruce Fields 124397ad4031SJ. Bruce Fields list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { 124497ad4031SJ. Bruce Fields if (!simple_positive(dentry)) { 124597ad4031SJ. Bruce Fields WARN_ON_ONCE(1); /* I think this can't happen? */ 124697ad4031SJ. Bruce Fields continue; 124797ad4031SJ. Bruce Fields } 124897ad4031SJ. Bruce Fields nfsdfs_remove_file(d_inode(root), dentry); 124997ad4031SJ. Bruce Fields } 125097ad4031SJ. Bruce Fields } 125197ad4031SJ. Bruce Fields 125297ad4031SJ. Bruce Fields /* XXX: cut'n'paste from simple_fill_super; figure out if we could share 125397ad4031SJ. Bruce Fields * code instead. */ 125497ad4031SJ. Bruce Fields static int nfsdfs_create_files(struct dentry *root, 1255472d155aSNeilBrown const struct tree_descr *files, 1256472d155aSNeilBrown struct dentry **fdentries) 125797ad4031SJ. Bruce Fields { 125897ad4031SJ. Bruce Fields struct inode *dir = d_inode(root); 125997ad4031SJ. Bruce Fields struct inode *inode; 126097ad4031SJ. Bruce Fields struct dentry *dentry; 126197ad4031SJ. Bruce Fields int i; 126297ad4031SJ. Bruce Fields 126397ad4031SJ. Bruce Fields inode_lock(dir); 126497ad4031SJ. Bruce Fields for (i = 0; files->name && files->name[0]; i++, files++) { 126597ad4031SJ. Bruce Fields dentry = d_alloc_name(root, files->name); 126697ad4031SJ. Bruce Fields if (!dentry) 126797ad4031SJ. Bruce Fields goto out; 126897ad4031SJ. Bruce Fields inode = nfsd_get_inode(d_inode(root)->i_sb, 126997ad4031SJ. Bruce Fields S_IFREG | files->mode); 127097ad4031SJ. Bruce Fields if (!inode) { 127197ad4031SJ. Bruce Fields dput(dentry); 127297ad4031SJ. Bruce Fields goto out; 127397ad4031SJ. Bruce Fields } 127497ad4031SJ. Bruce Fields inode->i_fop = files->ops; 127597ad4031SJ. Bruce Fields inode->i_private = __get_nfsdfs_client(dir); 127697ad4031SJ. Bruce Fields d_add(dentry, inode); 127797ad4031SJ. Bruce Fields fsnotify_create(dir, dentry); 1278472d155aSNeilBrown if (fdentries) 1279472d155aSNeilBrown fdentries[i] = dentry; 128097ad4031SJ. Bruce Fields } 128197ad4031SJ. Bruce Fields inode_unlock(dir); 128297ad4031SJ. Bruce Fields return 0; 128397ad4031SJ. Bruce Fields out: 128497ad4031SJ. Bruce Fields nfsdfs_remove_files(root); 128597ad4031SJ. Bruce Fields inode_unlock(dir); 128697ad4031SJ. Bruce Fields return -ENOMEM; 128797ad4031SJ. Bruce Fields } 128897ad4031SJ. Bruce Fields 128997ad4031SJ. Bruce Fields /* on success, returns positive number unique to that client. */ 129097ad4031SJ. Bruce Fields struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 129197ad4031SJ. Bruce Fields struct nfsdfs_client *ncl, u32 id, 1292472d155aSNeilBrown const struct tree_descr *files, 1293472d155aSNeilBrown struct dentry **fdentries) 129497ad4031SJ. Bruce Fields { 129597ad4031SJ. Bruce Fields struct dentry *dentry; 1296e8a79fb1SJ. Bruce Fields char name[11]; 129797ad4031SJ. Bruce Fields int ret; 1298e8a79fb1SJ. Bruce Fields 1299bf5ed3e3SJ. Bruce Fields sprintf(name, "%u", id); 1300e8a79fb1SJ. Bruce Fields 130197ad4031SJ. Bruce Fields dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); 130297ad4031SJ. Bruce Fields if (IS_ERR(dentry)) /* XXX: tossing errors? */ 130397ad4031SJ. Bruce Fields return NULL; 1304472d155aSNeilBrown ret = nfsdfs_create_files(dentry, files, fdentries); 130597ad4031SJ. Bruce Fields if (ret) { 130697ad4031SJ. Bruce Fields nfsd_client_rmdir(dentry); 130797ad4031SJ. Bruce Fields return NULL; 130897ad4031SJ. Bruce Fields } 130997ad4031SJ. Bruce Fields return dentry; 1310e8a79fb1SJ. Bruce Fields } 1311e8a79fb1SJ. Bruce Fields 1312e8a79fb1SJ. Bruce Fields /* Taken from __rpc_rmdir: */ 1313e8a79fb1SJ. Bruce Fields void nfsd_client_rmdir(struct dentry *dentry) 1314e8a79fb1SJ. Bruce Fields { 1315e8a79fb1SJ. Bruce Fields struct inode *dir = d_inode(dentry->d_parent); 1316e8a79fb1SJ. Bruce Fields struct inode *inode = d_inode(dentry); 1317e8a79fb1SJ. Bruce Fields int ret; 1318e8a79fb1SJ. Bruce Fields 131997ad4031SJ. Bruce Fields inode_lock(dir); 132097ad4031SJ. Bruce Fields nfsdfs_remove_files(dentry); 132197ad4031SJ. Bruce Fields clear_ncl(inode); 1322e8a79fb1SJ. Bruce Fields dget(dentry); 1323e8a79fb1SJ. Bruce Fields ret = simple_rmdir(dir, dentry); 1324e8a79fb1SJ. Bruce Fields WARN_ON_ONCE(ret); 132529044daeSAmir Goldstein d_drop(dentry); 132669afd267SJ. Bruce Fields fsnotify_rmdir(dir, dentry); 1327bf265401SJ. Bruce Fields dput(dentry); 132897ad4031SJ. Bruce Fields inode_unlock(dir); 1329e8a79fb1SJ. Bruce Fields } 1330e8a79fb1SJ. Bruce Fields 133196a374a3SDavid Howells static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) 13321da177e4SLinus Torvalds { 1333e8a79fb1SJ. Bruce Fields struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 1334e8a79fb1SJ. Bruce Fields nfsd_net_id); 1335e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1336e8a79fb1SJ. Bruce Fields int ret; 1337e8a79fb1SJ. Bruce Fields 1338cda37124SEric Biggers static const struct tree_descr nfsd_files[] = { 133996d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 134020ad856eSAmir Goldstein /* Per-export io stats use same ops as exports file */ 134120ad856eSAmir Goldstein [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO}, 1342e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 13439beeaab8SChenXiaoSong &export_features_fops, S_IRUGO}, 13444373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13454373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 134617efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 134717efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13481da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13491da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1350eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 135103cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 1352*64776611SChenXiaoSong [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", 1353*64776611SChenXiaoSong &nfsd_reply_cache_stats_fops, S_IRUGO}, 135470c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 135580212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1356596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13575b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 13582e6c6e4cSChuck Lever [NFSD_Filecache] = {"filecache", &filecache_ops, S_IRUGO}, 1359b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 13609beeaab8SChenXiaoSong [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", 13619beeaab8SChenXiaoSong &supported_enctypes_fops, S_IRUGO}, 1362b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 13631da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13641da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1365efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 13660964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 13677f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 13681da177e4SLinus Torvalds #endif 13691da177e4SLinus Torvalds /* last one */ {""} 13701da177e4SLinus Torvalds }; 137196a374a3SDavid Howells 1372e8a79fb1SJ. Bruce Fields ret = simple_fill_super(sb, 0x6e667364, nfsd_files); 1373e8a79fb1SJ. Bruce Fields if (ret) 1374e8a79fb1SJ. Bruce Fields return ret; 1375e8a79fb1SJ. Bruce Fields dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); 1376e8a79fb1SJ. Bruce Fields if (IS_ERR(dentry)) 1377e8a79fb1SJ. Bruce Fields return PTR_ERR(dentry); 1378e8a79fb1SJ. Bruce Fields nn->nfsd_client_dir = dentry; 1379e8a79fb1SJ. Bruce Fields return 0; 13801da177e4SLinus Torvalds } 13811da177e4SLinus Torvalds 138296a374a3SDavid Howells static int nfsd_fs_get_tree(struct fs_context *fc) 13831da177e4SLinus Torvalds { 1384533770ccSAl Viro return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); 138596a374a3SDavid Howells } 138696a374a3SDavid Howells 138796a374a3SDavid Howells static void nfsd_fs_free_fc(struct fs_context *fc) 138896a374a3SDavid Howells { 138996a374a3SDavid Howells if (fc->s_fs_info) 139096a374a3SDavid Howells put_net(fc->s_fs_info); 139196a374a3SDavid Howells } 139296a374a3SDavid Howells 139396a374a3SDavid Howells static const struct fs_context_operations nfsd_fs_context_ops = { 139496a374a3SDavid Howells .free = nfsd_fs_free_fc, 139596a374a3SDavid Howells .get_tree = nfsd_fs_get_tree, 139696a374a3SDavid Howells }; 139796a374a3SDavid Howells 139896a374a3SDavid Howells static int nfsd_init_fs_context(struct fs_context *fc) 139996a374a3SDavid Howells { 140096a374a3SDavid Howells put_user_ns(fc->user_ns); 140196a374a3SDavid Howells fc->user_ns = get_user_ns(fc->net_ns->user_ns); 140296a374a3SDavid Howells fc->ops = &nfsd_fs_context_ops; 140396a374a3SDavid Howells return 0; 140411f77942SStanislav Kinsbursky } 140511f77942SStanislav Kinsbursky 140611f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 140711f77942SStanislav Kinsbursky { 140811f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 140911f77942SStanislav Kinsbursky 1410c6c7f2a8STrond Myklebust nfsd_shutdown_threads(net); 1411c6c7f2a8STrond Myklebust 141211f77942SStanislav Kinsbursky kill_litter_super(sb); 141311f77942SStanislav Kinsbursky put_net(net); 14141da177e4SLinus Torvalds } 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 14171da177e4SLinus Torvalds .owner = THIS_MODULE, 14181da177e4SLinus Torvalds .name = "nfsd", 141996a374a3SDavid Howells .init_fs_context = nfsd_init_fs_context, 142011f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 14211da177e4SLinus Torvalds }; 14227f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 14231da177e4SLinus Torvalds 1424e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1425e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1426e331f606SJ. Bruce Fields { 1427e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1428e331f606SJ. Bruce Fields 1429e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1430e331f606SJ. Bruce Fields if (!entry) 1431e331f606SJ. Bruce Fields return -ENOMEM; 143297a32539SAlexey Dobriyan entry = proc_create("exports", 0, entry, &exports_proc_ops); 1433ff7c4b36Sfanchaoting if (!entry) { 1434ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1435e331f606SJ. Bruce Fields return -ENOMEM; 1436ff7c4b36Sfanchaoting } 1437e331f606SJ. Bruce Fields return 0; 1438e331f606SJ. Bruce Fields } 1439e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1440e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1441e331f606SJ. Bruce Fields { 1442e331f606SJ. Bruce Fields return 0; 1443e331f606SJ. Bruce Fields } 1444e331f606SJ. Bruce Fields #endif 1445e331f606SJ. Bruce Fields 1446c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 14475717e012SStanislav Kinsbursky 14485717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 14495717e012SStanislav Kinsbursky { 14505717e012SStanislav Kinsbursky int retval; 14513d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 14525717e012SStanislav Kinsbursky 14535717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 14545717e012SStanislav Kinsbursky if (retval) 14555717e012SStanislav Kinsbursky goto out_export_error; 1456f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1457f69adb2fSStanislav Kinsbursky if (retval) 1458f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1459e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1460e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 14617746b32fSDai Ngo retval = nfsd4_init_leases_net(nn); 14627746b32fSDai Ngo if (retval) 14637746b32fSDai Ngo goto out_drc_error; 14643ba75830SJ. Bruce Fields retval = nfsd_reply_cache_init(nn); 14653ba75830SJ. Bruce Fields if (retval) 14663ba75830SJ. Bruce Fields goto out_drc_error; 146791d2e9b5SChuck Lever get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); 146891d2e9b5SChuck Lever seqlock_init(&nn->writeverf_lock); 14692c830dd7SJ. Bruce Fields 14705717e012SStanislav Kinsbursky return 0; 14715717e012SStanislav Kinsbursky 14723ba75830SJ. Bruce Fields out_drc_error: 14733ba75830SJ. Bruce Fields nfsd_idmap_shutdown(net); 1474f69adb2fSStanislav Kinsbursky out_idmap_error: 1475f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 14765717e012SStanislav Kinsbursky out_export_error: 14775717e012SStanislav Kinsbursky return retval; 14785717e012SStanislav Kinsbursky } 14795717e012SStanislav Kinsbursky 14805717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 14815717e012SStanislav Kinsbursky { 14823ba75830SJ. Bruce Fields struct nfsd_net *nn = net_generic(net, nfsd_net_id); 14833ba75830SJ. Bruce Fields 14843ba75830SJ. Bruce Fields nfsd_reply_cache_shutdown(nn); 1485f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 14865717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1487e333f3bbSTrond Myklebust nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); 14887746b32fSDai Ngo nfsd4_leases_net_shutdown(nn); 14895717e012SStanislav Kinsbursky } 14905717e012SStanislav Kinsbursky 14917ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 14925717e012SStanislav Kinsbursky .init = nfsd_init_net, 14935717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 14947ea34ac1SJeff Layton .id = &nfsd_net_id, 14957ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 14967ea34ac1SJeff Layton }; 14977ea34ac1SJeff Layton 14981da177e4SLinus Torvalds static int __init init_nfsd(void) 14991da177e4SLinus Torvalds { 15001da177e4SLinus Torvalds int retval; 15011da177e4SLinus Torvalds 1502bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1503bb7ffbf2SGiuseppe Cantavenera if (retval) 1504b10252c7SAlexander Sverdlin return retval; 15059cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 150665178db4SBryan Schumaker if (retval) 150765178db4SBryan Schumaker goto out_free_slabs; 1508e567b98cSAmir Goldstein retval = nfsd_stat_init(); /* Statistics */ 1509e567b98cSAmir Goldstein if (retval) 1510e567b98cSAmir Goldstein goto out_free_pnfs; 1511027690c7SJ. Bruce Fields retval = nfsd_drc_slab_create(); 1512027690c7SJ. Bruce Fields if (retval) 1513027690c7SJ. Bruce Fields goto out_free_stat; 15141da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1515e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1516e331f606SJ. Bruce Fields if (retval) 1517f69adb2fSStanislav Kinsbursky goto out_free_lockd; 1518bd5ae928SJ. Bruce Fields retval = register_pernet_subsys(&nfsd_net_ops); 1519bd5ae928SJ. Bruce Fields if (retval < 0) 15206f6f84aaSZhang Xiaoxu goto out_free_exports; 1521b10252c7SAlexander Sverdlin retval = register_cld_notifier(); 1522b10252c7SAlexander Sverdlin if (retval) 152362fdb65eSZhang Xiaoxu goto out_free_subsys; 1524d76cc46bSDai Ngo retval = nfsd4_create_laundry_wq(); 1525d76cc46bSDai Ngo if (retval) 15266f6f84aaSZhang Xiaoxu goto out_free_cld; 15276f6f84aaSZhang Xiaoxu retval = register_filesystem(&nfsd_fs_type); 15286f6f84aaSZhang Xiaoxu if (retval) 1529d76cc46bSDai Ngo goto out_free_all; 153026808d3fSJ. Bruce Fields return 0; 153126808d3fSJ. Bruce Fields out_free_all: 15326f6f84aaSZhang Xiaoxu nfsd4_destroy_laundry_wq(); 15336f6f84aaSZhang Xiaoxu out_free_cld: 153462fdb65eSZhang Xiaoxu unregister_cld_notifier(); 153562fdb65eSZhang Xiaoxu out_free_subsys: 1536b10252c7SAlexander Sverdlin unregister_pernet_subsys(&nfsd_net_ops); 1537bd5ae928SJ. Bruce Fields out_free_exports: 15381da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15391da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1540dbf847ecSJ. Bruce Fields out_free_lockd: 15411da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1542027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 1543027690c7SJ. Bruce Fields out_free_stat: 1544d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 1545e567b98cSAmir Goldstein out_free_pnfs: 15469cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 154765178db4SBryan Schumaker out_free_slabs: 154846b25895SJ. Bruce Fields nfsd4_free_slabs(); 15491da177e4SLinus Torvalds return retval; 15501da177e4SLinus Torvalds } 15511da177e4SLinus Torvalds 15521da177e4SLinus Torvalds static void __exit exit_nfsd(void) 15531da177e4SLinus Torvalds { 15546f6f84aaSZhang Xiaoxu unregister_filesystem(&nfsd_fs_type); 1555d76cc46bSDai Ngo nfsd4_destroy_laundry_wq(); 1556b10252c7SAlexander Sverdlin unregister_cld_notifier(); 1557bd5ae928SJ. Bruce Fields unregister_pernet_subsys(&nfsd_net_ops); 1558027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 15591da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15601da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 15611da177e4SLinus Torvalds nfsd_stat_shutdown(); 15621da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1563e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 15649cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 15651da177e4SLinus Torvalds } 15661da177e4SLinus Torvalds 15671da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 15681da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 15691da177e4SLinus Torvalds module_init(init_nfsd) 15701da177e4SLinus Torvalds module_exit(exit_nfsd) 1571