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> 111da177e4SLinus Torvalds 1280212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 134373ea84SWendy Cheng #include <linux/lockd/lockd.h> 145976687aSJeff Layton #include <linux/sunrpc/addr.h> 15b0b0c0a2SKevin Coffman #include <linux/sunrpc/gss_api.h> 16b084f598SJ. Bruce Fields #include <linux/sunrpc/gss_krb5_enctypes.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" 279a74af21SBoaz Harrosh 281da177e4SLinus Torvalds /* 29b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 301da177e4SLinus Torvalds */ 311da177e4SLinus Torvalds enum { 321da177e4SLinus Torvalds NFSD_Root = 1, 331da177e4SLinus Torvalds NFSD_List, 34e8e8753fSJ. Bruce Fields NFSD_Export_features, 351da177e4SLinus Torvalds NFSD_Fh, 364373ea84SWendy Cheng NFSD_FO_UnlockIP, 3717efa372SWendy Cheng NFSD_FO_UnlockFS, 381da177e4SLinus Torvalds NFSD_Threads, 39eed2965aSGreg Banks NFSD_Pool_Threads, 4003cf6c9fSGreg Banks NFSD_Pool_Stats, 41a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 4270c3b76cSNeilBrown NFSD_Versions, 4380212d59SNeilBrown NFSD_Ports, 44596bbe53SNeilBrown NFSD_MaxBlkSize, 455b8db00bSJeff Layton NFSD_MaxConnections, 46b0b0c0a2SKevin Coffman NFSD_SupportedEnctypes, 4770c3b76cSNeilBrown /* 4870c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4970c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 5070c3b76cSNeilBrown */ 5170c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 521da177e4SLinus Torvalds NFSD_Leasetime, 53efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 540964a3d3SNeilBrown NFSD_RecoveryDir, 557f5ef2e9SJeff Layton NFSD_V4EndGrace, 5670c3b76cSNeilBrown #endif 57e8a79fb1SJ. Bruce Fields NFSD_MaxReserved 581da177e4SLinus Torvalds }; 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds /* 611da177e4SLinus Torvalds * write() for these nodes. 621da177e4SLinus Torvalds */ 631da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 64b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 65b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 661da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 67eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 6870c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 6980212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 70596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 715b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 7270c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 731da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 74efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 750964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 767f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 7770c3b76cSNeilBrown #endif 781da177e4SLinus Torvalds 79c2cdc2abSEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 801da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 81b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 82b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 831da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 84eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 8570c3b76cSNeilBrown [NFSD_Versions] = write_versions, 8680212d59SNeilBrown [NFSD_Ports] = write_ports, 87596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 885b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 8970c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 901da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 91efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 920964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 937f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 9470c3b76cSNeilBrown #endif 951da177e4SLinus Torvalds }; 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 981da177e4SLinus Torvalds { 99496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 1001da177e4SLinus Torvalds char *data; 1011da177e4SLinus Torvalds ssize_t rv; 1021da177e4SLinus Torvalds 103e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1041da177e4SLinus Torvalds return -EINVAL; 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1071da177e4SLinus Torvalds if (IS_ERR(data)) 1081da177e4SLinus Torvalds return PTR_ERR(data); 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1118971a101SNeilBrown if (rv >= 0) { 1121da177e4SLinus Torvalds simple_transaction_set(file, rv); 1131da177e4SLinus Torvalds rv = size; 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds return rv; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1187390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1197390022dSNeilBrown { 1207390022dSNeilBrown if (! file->private_data) { 1217390022dSNeilBrown /* An attempt to read a transaction file without writing 1227390022dSNeilBrown * causes a 0-byte write so that the file can return 1237390022dSNeilBrown * state information 1247390022dSNeilBrown */ 1257390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1267390022dSNeilBrown if (rv < 0) 1277390022dSNeilBrown return rv; 1287390022dSNeilBrown } 1297390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1307390022dSNeilBrown } 1317390022dSNeilBrown 1324b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1331da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1347390022dSNeilBrown .read = nfsctl_transaction_read, 1351da177e4SLinus Torvalds .release = simple_transaction_release, 1366038f373SArnd Bergmann .llseek = default_llseek, 1371da177e4SLinus Torvalds }; 1381da177e4SLinus Torvalds 13996d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1401da177e4SLinus Torvalds { 141f2c7ea10SStanislav Kinsbursky int err; 142f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 14396d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 144f2c7ea10SStanislav Kinsbursky 145f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 146f2c7ea10SStanislav Kinsbursky if (err) 147f2c7ea10SStanislav Kinsbursky return err; 148f2c7ea10SStanislav Kinsbursky 149f2c7ea10SStanislav Kinsbursky seq = file->private_data; 150e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 151f2c7ea10SStanislav Kinsbursky return 0; 1521da177e4SLinus Torvalds } 1531da177e4SLinus Torvalds 15496d851c4SStanislav Kinsbursky static int exports_proc_open(struct inode *inode, struct file *file) 15596d851c4SStanislav Kinsbursky { 15696d851c4SStanislav Kinsbursky return exports_net_open(current->nsproxy->net_ns, file); 15796d851c4SStanislav Kinsbursky } 15896d851c4SStanislav Kinsbursky 15996d851c4SStanislav Kinsbursky static const struct file_operations exports_proc_operations = { 16096d851c4SStanislav Kinsbursky .open = exports_proc_open, 16196d851c4SStanislav Kinsbursky .read = seq_read, 16296d851c4SStanislav Kinsbursky .llseek = seq_lseek, 16396d851c4SStanislav Kinsbursky .release = seq_release, 16496d851c4SStanislav Kinsbursky }; 16596d851c4SStanislav Kinsbursky 16696d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 16796d851c4SStanislav Kinsbursky { 16896d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 16996d851c4SStanislav Kinsbursky } 17096d851c4SStanislav Kinsbursky 17196d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 17296d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1731da177e4SLinus Torvalds .read = seq_read, 1741da177e4SLinus Torvalds .llseek = seq_lseek, 1751da177e4SLinus Torvalds .release = seq_release, 1761da177e4SLinus Torvalds }; 1771da177e4SLinus Torvalds 178e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 179e8e8753fSJ. Bruce Fields { 180e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 181e8e8753fSJ. Bruce Fields return 0; 182e8e8753fSJ. Bruce Fields } 183e8e8753fSJ. Bruce Fields 184e8e8753fSJ. Bruce Fields static int export_features_open(struct inode *inode, struct file *file) 185e8e8753fSJ. Bruce Fields { 186e8e8753fSJ. Bruce Fields return single_open(file, export_features_show, NULL); 187e8e8753fSJ. Bruce Fields } 188e8e8753fSJ. Bruce Fields 18975ef9de1SAl Viro static const struct file_operations export_features_operations = { 190e8e8753fSJ. Bruce Fields .open = export_features_open, 191e8e8753fSJ. Bruce Fields .read = seq_read, 192e8e8753fSJ. Bruce Fields .llseek = seq_lseek, 193e8e8753fSJ. Bruce Fields .release = single_release, 194e8e8753fSJ. Bruce Fields }; 195e8e8753fSJ. Bruce Fields 196b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 197b0b0c0a2SKevin Coffman static int supported_enctypes_show(struct seq_file *m, void *v) 198b0b0c0a2SKevin Coffman { 199b084f598SJ. Bruce Fields seq_printf(m, KRB5_SUPPORTED_ENCTYPES); 200b0b0c0a2SKevin Coffman return 0; 201b0b0c0a2SKevin Coffman } 202b0b0c0a2SKevin Coffman 203b0b0c0a2SKevin Coffman static int supported_enctypes_open(struct inode *inode, struct file *file) 204b0b0c0a2SKevin Coffman { 205b0b0c0a2SKevin Coffman return single_open(file, supported_enctypes_show, NULL); 206b0b0c0a2SKevin Coffman } 207b0b0c0a2SKevin Coffman 20875ef9de1SAl Viro static const struct file_operations supported_enctypes_ops = { 209b0b0c0a2SKevin Coffman .open = supported_enctypes_open, 210b0b0c0a2SKevin Coffman .read = seq_read, 211b0b0c0a2SKevin Coffman .llseek = seq_lseek, 212b0b0c0a2SKevin Coffman .release = single_release, 213b0b0c0a2SKevin Coffman }; 214b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 215b0b0c0a2SKevin Coffman 216828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 21703cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 21803cf6c9fSGreg Banks .read = seq_read, 21903cf6c9fSGreg Banks .llseek = seq_lseek, 220ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 22103cf6c9fSGreg Banks }; 22203cf6c9fSGreg Banks 2237ba630f5SJulia Lawall static const struct file_operations reply_cache_stats_operations = { 224a2f999a3SJeff Layton .open = nfsd_reply_cache_stats_open, 225a2f999a3SJeff Layton .read = seq_read, 226a2f999a3SJeff Layton .llseek = seq_lseek, 227a2f999a3SJeff Layton .release = single_release, 228a2f999a3SJeff Layton }; 229a2f999a3SJeff Layton 2301da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 2311da177e4SLinus Torvalds /* 2321da177e4SLinus Torvalds * payload - write methods 2331da177e4SLinus Torvalds */ 2341da177e4SLinus Torvalds 235244c7d44SAl Viro static inline struct net *netns(struct file *file) 236244c7d44SAl Viro { 237244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 238244c7d44SAl Viro } 2391da177e4SLinus Torvalds 240262a0982SChuck Lever /** 241262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 242262a0982SChuck Lever * 243262a0982SChuck Lever * Experimental. 244262a0982SChuck Lever * 245262a0982SChuck Lever * Input: 246262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2474116092bSChuck Lever * presentation format IP address 248262a0982SChuck Lever * size: length of C string in @buf 249262a0982SChuck Lever * Output: 250262a0982SChuck Lever * On success: returns zero if all specified locks were released; 251262a0982SChuck Lever * returns one if one or more locks were not released 252262a0982SChuck Lever * On error: return code is negative errno value 253262a0982SChuck Lever */ 254b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2554373ea84SWendy Cheng { 2564116092bSChuck Lever struct sockaddr_storage address; 2574116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2584116092bSChuck Lever size_t salen = sizeof(address); 259367c8c7bSChuck Lever char *fo_path; 260244c7d44SAl Viro struct net *net = netns(file); 2614373ea84SWendy Cheng 2624373ea84SWendy Cheng /* sanity check */ 2634373ea84SWendy Cheng if (size == 0) 2644373ea84SWendy Cheng return -EINVAL; 2654373ea84SWendy Cheng 2664373ea84SWendy Cheng if (buf[size-1] != '\n') 2674373ea84SWendy Cheng return -EINVAL; 2684373ea84SWendy Cheng 2694373ea84SWendy Cheng fo_path = buf; 2704373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2714373ea84SWendy Cheng return -EINVAL; 2724373ea84SWendy Cheng 27311f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2744373ea84SWendy Cheng return -EINVAL; 2754373ea84SWendy Cheng 2764116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2774373ea84SWendy Cheng } 2784373ea84SWendy Cheng 279262a0982SChuck Lever /** 280262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 281262a0982SChuck Lever * 282262a0982SChuck Lever * Experimental. 283262a0982SChuck Lever * 284262a0982SChuck Lever * Input: 285262a0982SChuck Lever * buf: '\n'-terminated C string containing the 286262a0982SChuck Lever * absolute pathname of a local file system 287262a0982SChuck Lever * size: length of C string in @buf 288262a0982SChuck Lever * Output: 289262a0982SChuck Lever * On success: returns zero if all specified locks were released; 290262a0982SChuck Lever * returns one if one or more locks were not released 291262a0982SChuck Lever * On error: return code is negative errno value 292262a0982SChuck Lever */ 293b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 29417efa372SWendy Cheng { 295a63bb996SAl Viro struct path path; 29617efa372SWendy Cheng char *fo_path; 29717efa372SWendy Cheng int error; 29817efa372SWendy Cheng 29917efa372SWendy Cheng /* sanity check */ 30017efa372SWendy Cheng if (size == 0) 30117efa372SWendy Cheng return -EINVAL; 30217efa372SWendy Cheng 30317efa372SWendy Cheng if (buf[size-1] != '\n') 30417efa372SWendy Cheng return -EINVAL; 30517efa372SWendy Cheng 30617efa372SWendy Cheng fo_path = buf; 30717efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 30817efa372SWendy Cheng return -EINVAL; 30917efa372SWendy Cheng 310a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 31117efa372SWendy Cheng if (error) 31217efa372SWendy Cheng return error; 31317efa372SWendy Cheng 314262a0982SChuck Lever /* 315262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 316262a0982SChuck Lever * releasing locks on the wrong file system. 317262a0982SChuck Lever * 318262a0982SChuck Lever * For example: 319262a0982SChuck Lever * 1. Does the path refer to a directory? 320262a0982SChuck Lever * 2. Is that directory a mount point, or 321262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 322262a0982SChuck Lever */ 323d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 32417efa372SWendy Cheng 325a63bb996SAl Viro path_put(&path); 32617efa372SWendy Cheng return error; 32717efa372SWendy Cheng } 32817efa372SWendy Cheng 329262a0982SChuck Lever /** 330262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 331262a0982SChuck Lever * 332262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 333262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 334262a0982SChuck Lever * contain escape sequences. 335262a0982SChuck Lever * 336262a0982SChuck Lever * Input: 337262a0982SChuck Lever * buf: 338262a0982SChuck Lever * domain: client domain name 339262a0982SChuck Lever * path: export pathname 340262a0982SChuck Lever * maxsize: numeric maximum size of 341262a0982SChuck Lever * @buf 342262a0982SChuck Lever * size: length of C string in @buf 343262a0982SChuck Lever * Output: 344262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 345262a0982SChuck Lever * string containing a ASCII hex text version 346262a0982SChuck Lever * of the NFS file handle; 347262a0982SChuck Lever * return code is the size in bytes of the string 348262a0982SChuck Lever * On error: return code is negative errno value 349262a0982SChuck Lever */ 3501da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3511da177e4SLinus Torvalds { 3521da177e4SLinus Torvalds char *dname, *path; 353246d95baSAndrew Morton int uninitialized_var(maxsize); 3541da177e4SLinus Torvalds char *mesg = buf; 3551da177e4SLinus Torvalds int len; 3561da177e4SLinus Torvalds struct auth_domain *dom; 3571da177e4SLinus Torvalds struct knfsd_fh fh; 3581da177e4SLinus Torvalds 35987d26ea7SJ. Bruce Fields if (size == 0) 36087d26ea7SJ. Bruce Fields return -EINVAL; 36187d26ea7SJ. Bruce Fields 3621da177e4SLinus Torvalds if (buf[size-1] != '\n') 3631da177e4SLinus Torvalds return -EINVAL; 3641da177e4SLinus Torvalds buf[size-1] = 0; 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds dname = mesg; 3671da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 36854224f04SChuck Lever if (len <= 0) 36954224f04SChuck Lever return -EINVAL; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds path = dname+len+1; 3721da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 37354224f04SChuck Lever if (len <= 0) 37454224f04SChuck Lever return -EINVAL; 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3771da177e4SLinus Torvalds if (len) 3781da177e4SLinus Torvalds return len; 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3811da177e4SLinus Torvalds return -EINVAL; 3823c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3851da177e4SLinus Torvalds return -EINVAL; 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3881da177e4SLinus Torvalds dom = unix_domain_find(dname); 3891da177e4SLinus Torvalds if (!dom) 3901da177e4SLinus Torvalds return -ENOMEM; 3911da177e4SLinus Torvalds 392244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3931da177e4SLinus Torvalds auth_domain_put(dom); 3941da177e4SLinus Torvalds if (len) 3951da177e4SLinus Torvalds return len; 3961da177e4SLinus Torvalds 39754224f04SChuck Lever mesg = buf; 39854224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 3991da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 4001da177e4SLinus Torvalds mesg[-1] = '\n'; 4011da177e4SLinus Torvalds return mesg - buf; 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 404262a0982SChuck Lever /** 405262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 406262a0982SChuck Lever * 407262a0982SChuck Lever * Input: 408262a0982SChuck Lever * buf: ignored 409262a0982SChuck Lever * size: zero 410262a0982SChuck Lever * Output: 411262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 412262a0982SChuck Lever * string numeric value representing the number of 413262a0982SChuck Lever * running NFSD threads; 414262a0982SChuck Lever * return code is the size in bytes of the string 415262a0982SChuck Lever * On error: return code is zero 416262a0982SChuck Lever * 417262a0982SChuck Lever * OR 418262a0982SChuck Lever * 419262a0982SChuck Lever * Input: 420262a0982SChuck Lever * buf: C string containing an unsigned 421262a0982SChuck Lever * integer value representing the 422262a0982SChuck Lever * number of NFSD threads to start 423262a0982SChuck Lever * size: non-zero length of C string in @buf 424262a0982SChuck Lever * Output: 425262a0982SChuck Lever * On success: NFS service is started; 426262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 427262a0982SChuck Lever * string numeric value representing the number of 428262a0982SChuck Lever * running NFSD threads; 429262a0982SChuck Lever * return code is the size in bytes of the string 430262a0982SChuck Lever * On error: return code is zero or a negative errno value 431262a0982SChuck Lever */ 4321da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 4331da177e4SLinus Torvalds { 4341da177e4SLinus Torvalds char *mesg = buf; 4351da177e4SLinus Torvalds int rv; 436244c7d44SAl Viro struct net *net = netns(file); 437d41a9417SStanislav Kinsbursky 4381da177e4SLinus Torvalds if (size > 0) { 4391da177e4SLinus Torvalds int newthreads; 4401da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4411da177e4SLinus Torvalds if (rv) 4421da177e4SLinus Torvalds return rv; 4431da177e4SLinus Torvalds if (newthreads < 0) 4441da177e4SLinus Torvalds return -EINVAL; 4454df493a2STrond Myklebust rv = nfsd_svc(newthreads, net, file->f_cred); 44682e12fe9SNeilBrown if (rv < 0) 4471da177e4SLinus Torvalds return rv; 44882e12fe9SNeilBrown } else 4499dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 450e06b6405SChuck Lever 45182e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds 454262a0982SChuck Lever /** 455262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 456262a0982SChuck Lever * 457262a0982SChuck Lever * Input: 458262a0982SChuck Lever * buf: ignored 459262a0982SChuck Lever * size: zero 460262a0982SChuck Lever * 461262a0982SChuck Lever * OR 462262a0982SChuck Lever * 463262a0982SChuck Lever * Input: 464262a0982SChuck Lever * buf: C string containing whitespace- 465262a0982SChuck Lever * separated unsigned integer values 466262a0982SChuck Lever * representing the number of NFSD 467262a0982SChuck Lever * threads to start in each pool 468262a0982SChuck Lever * size: non-zero length of C string in @buf 469262a0982SChuck Lever * Output: 470262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 471262a0982SChuck Lever * string containing integer values representing the 472262a0982SChuck Lever * number of NFSD threads in each pool; 473262a0982SChuck Lever * return code is the size in bytes of the string 474262a0982SChuck Lever * On error: return code is zero or a negative errno value 475262a0982SChuck Lever */ 476eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 477eed2965aSGreg Banks { 478eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 479eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 480eed2965aSGreg Banks */ 481eed2965aSGreg Banks char *mesg = buf; 482eed2965aSGreg Banks int i; 483eed2965aSGreg Banks int rv; 484eed2965aSGreg Banks int len; 485bedbdd8bSNeil Brown int npools; 486eed2965aSGreg Banks int *nthreads; 487244c7d44SAl Viro struct net *net = netns(file); 488eed2965aSGreg Banks 489bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4909dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 491eed2965aSGreg Banks if (npools == 0) { 492eed2965aSGreg Banks /* 493eed2965aSGreg Banks * NFS is shut down. The admin can start it by 494eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 495eed2965aSGreg Banks * file, sorry. Report zero threads. 496eed2965aSGreg Banks */ 497bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 498eed2965aSGreg Banks strcpy(buf, "0\n"); 499eed2965aSGreg Banks return strlen(buf); 500eed2965aSGreg Banks } 501eed2965aSGreg Banks 502eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 503bedbdd8bSNeil Brown rv = -ENOMEM; 504eed2965aSGreg Banks if (nthreads == NULL) 505bedbdd8bSNeil Brown goto out_free; 506eed2965aSGreg Banks 507eed2965aSGreg Banks if (size > 0) { 508eed2965aSGreg Banks for (i = 0; i < npools; i++) { 509eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 510eed2965aSGreg Banks if (rv == -ENOENT) 511eed2965aSGreg Banks break; /* fewer numbers than pools */ 512eed2965aSGreg Banks if (rv) 513eed2965aSGreg Banks goto out_free; /* syntax error */ 514eed2965aSGreg Banks rv = -EINVAL; 515eed2965aSGreg Banks if (nthreads[i] < 0) 516eed2965aSGreg Banks goto out_free; 517eed2965aSGreg Banks } 5183938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 519eed2965aSGreg Banks if (rv) 520eed2965aSGreg Banks goto out_free; 521eed2965aSGreg Banks } 522eed2965aSGreg Banks 5239dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 524eed2965aSGreg Banks if (rv) 525eed2965aSGreg Banks goto out_free; 526eed2965aSGreg Banks 527eed2965aSGreg Banks mesg = buf; 528eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 529eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 530eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 531eed2965aSGreg Banks len = strlen(mesg); 532eed2965aSGreg Banks size -= len; 533eed2965aSGreg Banks mesg += len; 534eed2965aSGreg Banks } 535413d63d7SJ. Bruce Fields rv = mesg - buf; 536eed2965aSGreg Banks out_free: 537eed2965aSGreg Banks kfree(nthreads); 538bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 539eed2965aSGreg Banks return rv; 540eed2965aSGreg Banks } 541eed2965aSGreg Banks 542ff7d1179STrond Myklebust static ssize_t 543e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 544e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 545ff7d1179STrond Myklebust { 546abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 547e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 548ff7d1179STrond Myklebust 549abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 550e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 551ff7d1179STrond Myklebust supported = false; 552abcb4dacSNeilBrown if (minor == 0 && supported) 553abcb4dacSNeilBrown /* 554abcb4dacSNeilBrown * special case for backward compatability. 555abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 556abcb4dacSNeilBrown * +4, unless -4.0 is present. 557abcb4dacSNeilBrown */ 558abcb4dacSNeilBrown return 0; 559ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 560ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 561ff7d1179STrond Myklebust } 562ff7d1179STrond Myklebust 5633dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 56470c3b76cSNeilBrown { 56570c3b76cSNeilBrown char *mesg = buf; 5668daf220aSBenny Halevy char *vers, *minorp, sign; 567261758b5SChuck Lever int len, num, remaining; 56870c3b76cSNeilBrown ssize_t tlen = 0; 56970c3b76cSNeilBrown char *sep; 570244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 57170c3b76cSNeilBrown 57270c3b76cSNeilBrown if (size>0) { 5739dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5746658d3a7SNeilBrown /* Cannot change versions without updating 5759dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5766658d3a7SNeilBrown * rq_argp and rq_resp 5776658d3a7SNeilBrown */ 57870c3b76cSNeilBrown return -EBUSY; 57970c3b76cSNeilBrown if (buf[size-1] != '\n') 58070c3b76cSNeilBrown return -EINVAL; 58170c3b76cSNeilBrown buf[size-1] = 0; 58270c3b76cSNeilBrown 58370c3b76cSNeilBrown vers = mesg; 58470c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 58570c3b76cSNeilBrown if (len <= 0) return -EINVAL; 58670c3b76cSNeilBrown do { 587d3635ff0STrond Myklebust enum vers_op cmd; 588abcb4dacSNeilBrown unsigned minor; 58970c3b76cSNeilBrown sign = *vers; 59070c3b76cSNeilBrown if (sign == '+' || sign == '-') 5918daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 59270c3b76cSNeilBrown else 5938daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5948daf220aSBenny Halevy if (*minorp == '.') { 595ff89be87SJ. Bruce Fields if (num != 4) 5968daf220aSBenny Halevy return -EINVAL; 597e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5988daf220aSBenny Halevy return -EINVAL; 599abcb4dacSNeilBrown } 600abcb4dacSNeilBrown 601d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 60270c3b76cSNeilBrown switch(num) { 60370c3b76cSNeilBrown case 2: 60470c3b76cSNeilBrown case 3: 605e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 606d3635ff0STrond Myklebust break; 60770c3b76cSNeilBrown case 4: 608abcb4dacSNeilBrown if (*minorp == '.') { 609e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 610abcb4dacSNeilBrown return -EINVAL; 611e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 612abcb4dacSNeilBrown /* 613abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 614abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 615abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 616abcb4dacSNeilBrown */ 617abcb4dacSNeilBrown minor = 0; 618e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 619abcb4dacSNeilBrown minor++; 620abcb4dacSNeilBrown } 62170c3b76cSNeilBrown break; 62270c3b76cSNeilBrown default: 62370c3b76cSNeilBrown return -EINVAL; 62470c3b76cSNeilBrown } 62570c3b76cSNeilBrown vers += len + 1; 62670c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 62770c3b76cSNeilBrown /* If all get turned off, turn them back on, as 62870c3b76cSNeilBrown * having no versions is BAD 62970c3b76cSNeilBrown */ 630e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 63170c3b76cSNeilBrown } 632261758b5SChuck Lever 63370c3b76cSNeilBrown /* Now write current state into reply buffer */ 63470c3b76cSNeilBrown len = 0; 63570c3b76cSNeilBrown sep = ""; 636261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 637ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 638abcb4dacSNeilBrown int minor; 639e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 640e35659f1SNeilBrown continue; 641abcb4dacSNeilBrown 642abcb4dacSNeilBrown minor = -1; 643ff7d1179STrond Myklebust do { 644e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 645ff7d1179STrond Myklebust sep, num, minor); 646818f2f57SDan Carpenter if (len >= remaining) 647ff7d1179STrond Myklebust goto out; 648261758b5SChuck Lever remaining -= len; 649261758b5SChuck Lever buf += len; 650261758b5SChuck Lever tlen += len; 651ff7d1179STrond Myklebust minor++; 652abcb4dacSNeilBrown if (len) 653ff7d1179STrond Myklebust sep = " "; 654ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 655261758b5SChuck Lever } 656ff7d1179STrond Myklebust out: 657261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 658818f2f57SDan Carpenter if (len >= remaining) 659261758b5SChuck Lever return -EINVAL; 660261758b5SChuck Lever return tlen + len; 66170c3b76cSNeilBrown } 66270c3b76cSNeilBrown 663262a0982SChuck Lever /** 664262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 665262a0982SChuck Lever * 666262a0982SChuck Lever * Input: 667262a0982SChuck Lever * buf: ignored 668262a0982SChuck Lever * size: zero 669262a0982SChuck Lever * Output: 670262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 671262a0982SChuck Lever * string containing positive or negative integer 672262a0982SChuck Lever * values representing the current status of each 673262a0982SChuck Lever * protocol version; 674262a0982SChuck Lever * return code is the size in bytes of the string 675262a0982SChuck Lever * On error: return code is zero or a negative errno value 676262a0982SChuck Lever * 677262a0982SChuck Lever * OR 678262a0982SChuck Lever * 679262a0982SChuck Lever * Input: 680262a0982SChuck Lever * buf: C string containing whitespace- 681262a0982SChuck Lever * separated positive or negative 682262a0982SChuck Lever * integer values representing NFS 683262a0982SChuck Lever * protocol versions to enable ("+n") 684262a0982SChuck Lever * or disable ("-n") 685262a0982SChuck Lever * size: non-zero length of C string in @buf 686262a0982SChuck Lever * Output: 687262a0982SChuck Lever * On success: status of zero or more protocol versions has 688262a0982SChuck Lever * been updated; passed-in buffer filled with 689262a0982SChuck Lever * '\n'-terminated C string containing positive 690262a0982SChuck Lever * or negative integer values representing the 691262a0982SChuck Lever * current status of each protocol version; 692262a0982SChuck Lever * return code is the size in bytes of the string 693262a0982SChuck Lever * On error: return code is zero or a negative errno value 694262a0982SChuck Lever */ 6953dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6963dd98a3bSJeff Layton { 6973dd98a3bSJeff Layton ssize_t rv; 6983dd98a3bSJeff Layton 6993dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 7003dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 7013dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 7023dd98a3bSJeff Layton return rv; 7033dd98a3bSJeff Layton } 7043dd98a3bSJeff Layton 7054cd5dc75SChuck Lever /* 7060a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 7070a5372d8SChuck Lever * transports. 7080a5372d8SChuck Lever */ 7099dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 7100a5372d8SChuck Lever { 7119dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7129dd9845fSStanislav Kinsbursky 7139dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 7140a5372d8SChuck Lever return 0; 7159dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 7160a5372d8SChuck Lever } 7170a5372d8SChuck Lever 7180a5372d8SChuck Lever /* 7190b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 7200b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 7210b7c2f6fSChuck Lever * nfsd listener. 7220b7c2f6fSChuck Lever */ 7234df493a2STrond Myklebust static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 7240b7c2f6fSChuck Lever { 7250b7c2f6fSChuck Lever char *mesg = buf; 7260b7c2f6fSChuck Lever int fd, err; 7279dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7280b7c2f6fSChuck Lever 7290b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 7300b7c2f6fSChuck Lever if (err != 0 || fd < 0) 7310b7c2f6fSChuck Lever return -EINVAL; 7320b7c2f6fSChuck Lever 73330646394SStanislav Kinsbursky if (svc_alien_sock(net, fd)) { 73430646394SStanislav Kinsbursky printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); 73530646394SStanislav Kinsbursky return -EINVAL; 73630646394SStanislav Kinsbursky } 73730646394SStanislav Kinsbursky 7386777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7390b7c2f6fSChuck Lever if (err != 0) 7400b7c2f6fSChuck Lever return err; 7410b7c2f6fSChuck Lever 7424df493a2STrond Myklebust err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 74378a8d7c8SJeff Layton if (err < 0) { 74419f7e2caSStanislav Kinsbursky nfsd_destroy(net); 74578a8d7c8SJeff Layton return err; 74678a8d7c8SJeff Layton } 747ea068badSChuck Lever 7480b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 7499dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 750ea068badSChuck Lever return err; 7510b7c2f6fSChuck Lever } 7520b7c2f6fSChuck Lever 7530b7c2f6fSChuck Lever /* 7544eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 7554eb68c26SChuck Lever * a port number. 7564eb68c26SChuck Lever */ 7574df493a2STrond Myklebust static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 7584eb68c26SChuck Lever { 7594eb68c26SChuck Lever char transport[16]; 76037498292SChuck Lever struct svc_xprt *xprt; 7614eb68c26SChuck Lever int port, err; 7629dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7634eb68c26SChuck Lever 764a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7654eb68c26SChuck Lever return -EINVAL; 7664eb68c26SChuck Lever 7674be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7684eb68c26SChuck Lever return -EINVAL; 7694eb68c26SChuck Lever 7706777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7714eb68c26SChuck Lever if (err != 0) 7724eb68c26SChuck Lever return err; 7734eb68c26SChuck Lever 7749dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 7754df493a2STrond Myklebust PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 77668717908SChuck Lever if (err < 0) 77737498292SChuck Lever goto out_err; 77837498292SChuck Lever 7799dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 7804df493a2STrond Myklebust PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 78137498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 78237498292SChuck Lever goto out_close; 7830cd14a06SJeff Layton 7840cd14a06SJeff Layton /* Decrease the count, but don't shut down the service */ 7859dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 7864eb68c26SChuck Lever return 0; 78737498292SChuck Lever out_close: 7889dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 78937498292SChuck Lever if (xprt != NULL) { 79037498292SChuck Lever svc_close_xprt(xprt); 79137498292SChuck Lever svc_xprt_put(xprt); 79237498292SChuck Lever } 79337498292SChuck Lever out_err: 79419f7e2caSStanislav Kinsbursky nfsd_destroy(net); 79537498292SChuck Lever return err; 7964eb68c26SChuck Lever } 7974eb68c26SChuck Lever 79808160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 79908160352SStanislav Kinsbursky struct net *net) 80080212d59SNeilBrown { 8010a5372d8SChuck Lever if (size == 0) 8029dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 8030b7c2f6fSChuck Lever 8040b7c2f6fSChuck Lever if (isdigit(buf[0])) 8054df493a2STrond Myklebust return __write_ports_addfd(buf, net, file->f_cred); 80682d56591SChuck Lever 8074eb68c26SChuck Lever if (isalpha(buf[0])) 8084df493a2STrond Myklebust return __write_ports_addxprt(buf, net, file->f_cred); 8094cd5dc75SChuck Lever 810b41b66d6SNeilBrown return -EINVAL; 811b41b66d6SNeilBrown } 81280212d59SNeilBrown 813262a0982SChuck Lever /** 814262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 815262a0982SChuck Lever * 816262a0982SChuck Lever * Input: 817262a0982SChuck Lever * buf: ignored 818262a0982SChuck Lever * size: zero 819262a0982SChuck Lever * Output: 820262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 821262a0982SChuck Lever * string containing a whitespace-separated list of 822262a0982SChuck Lever * named NFSD listeners; 823262a0982SChuck Lever * return code is the size in bytes of the string 824262a0982SChuck Lever * On error: return code is zero or a negative errno value 825262a0982SChuck Lever * 826262a0982SChuck Lever * OR 827262a0982SChuck Lever * 828262a0982SChuck Lever * Input: 829262a0982SChuck Lever * buf: C string containing an unsigned 830262a0982SChuck Lever * integer value representing a bound 831262a0982SChuck Lever * but unconnected socket that is to be 832c71206a7SChuck Lever * used as an NFSD listener; listen(3) 833c71206a7SChuck Lever * must be called for a SOCK_STREAM 834c71206a7SChuck Lever * socket, otherwise it is ignored 835262a0982SChuck Lever * size: non-zero length of C string in @buf 836262a0982SChuck Lever * Output: 837262a0982SChuck Lever * On success: NFS service is started; 838262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 839262a0982SChuck Lever * string containing a unique alphanumeric name of 840262a0982SChuck Lever * the listener; 841262a0982SChuck Lever * return code is the size in bytes of the string 842262a0982SChuck Lever * On error: return code is a negative errno value 843262a0982SChuck Lever * 844262a0982SChuck Lever * OR 845262a0982SChuck Lever * 846262a0982SChuck Lever * Input: 847262a0982SChuck Lever * buf: C string containing a transport 848262a0982SChuck Lever * name and an unsigned integer value 849262a0982SChuck Lever * representing the port to listen on, 850262a0982SChuck Lever * separated by whitespace 851262a0982SChuck Lever * size: non-zero length of C string in @buf 852262a0982SChuck Lever * Output: 853262a0982SChuck Lever * On success: returns zero; NFS service is started 854262a0982SChuck Lever * On error: return code is a negative errno value 855262a0982SChuck Lever */ 856bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 857bedbdd8bSNeil Brown { 858bedbdd8bSNeil Brown ssize_t rv; 8593dd98a3bSJeff Layton 860bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 861244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 862bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 863bedbdd8bSNeil Brown return rv; 864bedbdd8bSNeil Brown } 865bedbdd8bSNeil Brown 866bedbdd8bSNeil Brown 867596bbe53SNeilBrown int nfsd_max_blksize; 868596bbe53SNeilBrown 869262a0982SChuck Lever /** 870262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 871262a0982SChuck Lever * 872262a0982SChuck Lever * Input: 873262a0982SChuck Lever * buf: ignored 874262a0982SChuck Lever * size: zero 875262a0982SChuck Lever * 876262a0982SChuck Lever * OR 877262a0982SChuck Lever * 878262a0982SChuck Lever * Input: 879262a0982SChuck Lever * buf: C string containing an unsigned 880262a0982SChuck Lever * integer value representing the new 881262a0982SChuck Lever * NFS blksize 882262a0982SChuck Lever * size: non-zero length of C string in @buf 883262a0982SChuck Lever * Output: 884262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 885262a0982SChuck Lever * containing numeric value of the current NFS blksize 886262a0982SChuck Lever * setting; 887262a0982SChuck Lever * return code is the size in bytes of the string 888262a0982SChuck Lever * On error: return code is zero or a negative errno value 889262a0982SChuck Lever */ 890596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 891596bbe53SNeilBrown { 892596bbe53SNeilBrown char *mesg = buf; 893244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8949dd9845fSStanislav Kinsbursky 895596bbe53SNeilBrown if (size > 0) { 896596bbe53SNeilBrown int bsize; 897596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 898596bbe53SNeilBrown if (rv) 899596bbe53SNeilBrown return rv; 900596bbe53SNeilBrown /* force bsize into allowed range and 901596bbe53SNeilBrown * required alignment. 902596bbe53SNeilBrown */ 9033c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 9043c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 905596bbe53SNeilBrown bsize &= ~(1024-1); 906bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 9079dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 908bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 909596bbe53SNeilBrown return -EBUSY; 910596bbe53SNeilBrown } 911596bbe53SNeilBrown nfsd_max_blksize = bsize; 912bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 913596bbe53SNeilBrown } 914e06b6405SChuck Lever 915e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 916e06b6405SChuck Lever nfsd_max_blksize); 917596bbe53SNeilBrown } 918596bbe53SNeilBrown 9195b8db00bSJeff Layton /** 9205b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 9215b8db00bSJeff Layton * 9225b8db00bSJeff Layton * Input: 9235b8db00bSJeff Layton * buf: ignored 9245b8db00bSJeff Layton * size: zero 9255b8db00bSJeff Layton * OR 9265b8db00bSJeff Layton * 9275b8db00bSJeff Layton * Input: 9285b8db00bSJeff Layton * buf: C string containing an unsigned 9295b8db00bSJeff Layton * integer value representing the new 9305b8db00bSJeff Layton * number of max connections 9315b8db00bSJeff Layton * size: non-zero length of C string in @buf 9325b8db00bSJeff Layton * Output: 9335b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9345b8db00bSJeff Layton * containing numeric value of max_connections setting 9355b8db00bSJeff Layton * for this net namespace; 9365b8db00bSJeff Layton * return code is the size in bytes of the string 9375b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9385b8db00bSJeff Layton */ 9395b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9405b8db00bSJeff Layton { 9415b8db00bSJeff Layton char *mesg = buf; 942244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9435b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9445b8db00bSJeff Layton 9455b8db00bSJeff Layton if (size > 0) { 9465b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9475b8db00bSJeff Layton 9485b8db00bSJeff Layton if (rv) 9495b8db00bSJeff Layton return rv; 9505b8db00bSJeff Layton nn->max_connections = maxconn; 9515b8db00bSJeff Layton } 9525b8db00bSJeff Layton 9535b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9545b8db00bSJeff Layton } 9555b8db00bSJeff Layton 95670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9579dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 9589dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 9591da177e4SLinus Torvalds { 9601da177e4SLinus Torvalds char *mesg = buf; 961f0135740SJ. Bruce Fields int rv, i; 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds if (size > 0) { 9649dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9653dd98a3bSJeff Layton return -EBUSY; 966f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9671da177e4SLinus Torvalds if (rv) 9681da177e4SLinus Torvalds return rv; 969e7b184f1SJ. Bruce Fields /* 970e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 971e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 972e7b184f1SJ. Bruce Fields * extremes are: 973e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 974e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 975e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 976e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 977e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 978e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 979e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 980e7b184f1SJ. Bruce Fields */ 981f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9821da177e4SLinus Torvalds return -EINVAL; 983f0135740SJ. Bruce Fields *time = i; 9841da177e4SLinus Torvalds } 985e06b6405SChuck Lever 986f0135740SJ. Bruce Fields return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 987f0135740SJ. Bruce Fields } 988f0135740SJ. Bruce Fields 9899dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 9909dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 991f0135740SJ. Bruce Fields { 992f0135740SJ. Bruce Fields ssize_t rv; 993f0135740SJ. Bruce Fields 994f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9959dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 996f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 997f0135740SJ. Bruce Fields return rv; 9981da177e4SLinus Torvalds } 9991da177e4SLinus Torvalds 1000262a0982SChuck Lever /** 1001262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 1002262a0982SChuck Lever * 1003262a0982SChuck Lever * Input: 1004262a0982SChuck Lever * buf: ignored 1005262a0982SChuck Lever * size: zero 1006262a0982SChuck Lever * 1007262a0982SChuck Lever * OR 1008262a0982SChuck Lever * 1009262a0982SChuck Lever * Input: 1010262a0982SChuck Lever * buf: C string containing an unsigned 1011262a0982SChuck Lever * integer value representing the new 1012262a0982SChuck Lever * NFSv4 lease expiry time 1013262a0982SChuck Lever * size: non-zero length of C string in @buf 1014262a0982SChuck Lever * Output: 1015262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1016262a0982SChuck Lever * string containing unsigned integer value of the 1017262a0982SChuck Lever * current lease expiry time; 1018262a0982SChuck Lever * return code is the size in bytes of the string 1019262a0982SChuck Lever * On error: return code is zero or a negative errno value 1020262a0982SChuck Lever */ 10213dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 10223dd98a3bSJeff Layton { 1023244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10249dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 10253dd98a3bSJeff Layton } 10263dd98a3bSJeff Layton 1027efc4bb4fSJ. Bruce Fields /** 1028efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1029efc4bb4fSJ. Bruce Fields * 1030efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1031efc4bb4fSJ. Bruce Fields * 1032efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1033efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1034efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1035efc4bb4fSJ. Bruce Fields * anyway.) 1036efc4bb4fSJ. Bruce Fields */ 1037efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1038efc4bb4fSJ. Bruce Fields { 1039244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10409dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1041efc4bb4fSJ. Bruce Fields } 1042efc4bb4fSJ. Bruce Fields 10439dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10449dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10450964a3d3SNeilBrown { 10460964a3d3SNeilBrown char *mesg = buf; 10470964a3d3SNeilBrown char *recdir; 10480964a3d3SNeilBrown int len, status; 10490964a3d3SNeilBrown 10503dd98a3bSJeff Layton if (size > 0) { 10519dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10523dd98a3bSJeff Layton return -EBUSY; 10533dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10540964a3d3SNeilBrown return -EINVAL; 10550964a3d3SNeilBrown buf[size-1] = 0; 10560964a3d3SNeilBrown 10570964a3d3SNeilBrown recdir = mesg; 10580964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10590964a3d3SNeilBrown if (len <= 0) 10600964a3d3SNeilBrown return -EINVAL; 10610964a3d3SNeilBrown 10620964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 106369049961SAndi Kleen if (status) 106469049961SAndi Kleen return status; 10653dd98a3bSJeff Layton } 10663d72ab8fSChuck Lever 10673d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10683d72ab8fSChuck Lever nfs4_recoverydir()); 10690964a3d3SNeilBrown } 10703dd98a3bSJeff Layton 1071262a0982SChuck Lever /** 1072262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1073262a0982SChuck Lever * 1074262a0982SChuck Lever * Input: 1075262a0982SChuck Lever * buf: ignored 1076262a0982SChuck Lever * size: zero 1077262a0982SChuck Lever * 1078262a0982SChuck Lever * OR 1079262a0982SChuck Lever * 1080262a0982SChuck Lever * Input: 1081262a0982SChuck Lever * buf: C string containing the pathname 1082262a0982SChuck Lever * of the directory on a local file 1083262a0982SChuck Lever * system containing permanent NFSv4 1084262a0982SChuck Lever * recovery data 1085262a0982SChuck Lever * size: non-zero length of C string in @buf 1086262a0982SChuck Lever * Output: 1087262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1088262a0982SChuck Lever * containing the current recovery pathname setting; 1089262a0982SChuck Lever * return code is the size in bytes of the string 1090262a0982SChuck Lever * On error: return code is zero or a negative errno value 1091262a0982SChuck Lever */ 10923dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10933dd98a3bSJeff Layton { 10943dd98a3bSJeff Layton ssize_t rv; 1095244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10963dd98a3bSJeff Layton 10973dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10989dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10993dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 11003dd98a3bSJeff Layton return rv; 11013dd98a3bSJeff Layton } 11023dd98a3bSJeff Layton 11037f5ef2e9SJeff Layton /** 11047f5ef2e9SJeff Layton * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 11057f5ef2e9SJeff Layton * 11067f5ef2e9SJeff Layton * Input: 11077f5ef2e9SJeff Layton * buf: ignored 11087f5ef2e9SJeff Layton * size: zero 11097f5ef2e9SJeff Layton * OR 11107f5ef2e9SJeff Layton * 11117f5ef2e9SJeff Layton * Input: 11127f5ef2e9SJeff Layton * buf: any value 11137f5ef2e9SJeff Layton * size: non-zero length of C string in @buf 11147f5ef2e9SJeff Layton * Output: 11157f5ef2e9SJeff Layton * passed-in buffer filled with "Y" or "N" with a newline 11167f5ef2e9SJeff Layton * and NULL-terminated C string. This indicates whether 11177f5ef2e9SJeff Layton * the grace period has ended in the current net 11187f5ef2e9SJeff Layton * namespace. Return code is the size in bytes of the 11197f5ef2e9SJeff Layton * string. Writing a string that starts with 'Y', 'y', or 11207f5ef2e9SJeff Layton * '1' to the file will end the grace period for nfsd's v4 11217f5ef2e9SJeff Layton * lock manager. 11227f5ef2e9SJeff Layton */ 11237f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 11247f5ef2e9SJeff Layton { 1125244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 11267f5ef2e9SJeff Layton 11277f5ef2e9SJeff Layton if (size > 0) { 11287f5ef2e9SJeff Layton switch(buf[0]) { 11297f5ef2e9SJeff Layton case 'Y': 11307f5ef2e9SJeff Layton case 'y': 11317f5ef2e9SJeff Layton case '1': 1132dd838821SYihao Wu if (!nn->nfsd_serv) 113362a063b8SJ. Bruce Fields return -EBUSY; 11347f5ef2e9SJeff Layton nfsd4_end_grace(nn); 11357f5ef2e9SJeff Layton break; 11367f5ef2e9SJeff Layton default: 11377f5ef2e9SJeff Layton return -EINVAL; 11387f5ef2e9SJeff Layton } 11397f5ef2e9SJeff Layton } 11407f5ef2e9SJeff Layton 11417f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 11427f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 11437f5ef2e9SJeff Layton } 11447f5ef2e9SJeff Layton 114570c3b76cSNeilBrown #endif 11460964a3d3SNeilBrown 11471da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11481da177e4SLinus Torvalds /* 11491da177e4SLinus Torvalds * populating the filesystem. 11501da177e4SLinus Torvalds */ 11511da177e4SLinus Torvalds 1152e8a79fb1SJ. Bruce Fields /* Basically copying rpc_get_inode. */ 1153e8a79fb1SJ. Bruce Fields static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) 1154e8a79fb1SJ. Bruce Fields { 1155e8a79fb1SJ. Bruce Fields struct inode *inode = new_inode(sb); 1156e8a79fb1SJ. Bruce Fields if (!inode) 1157e8a79fb1SJ. Bruce Fields return NULL; 1158e8a79fb1SJ. Bruce Fields /* Following advice from simple_fill_super documentation: */ 1159e8a79fb1SJ. Bruce Fields inode->i_ino = iunique(sb, NFSD_MaxReserved); 1160e8a79fb1SJ. Bruce Fields inode->i_mode = mode; 1161e8a79fb1SJ. Bruce Fields inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 1162e8a79fb1SJ. Bruce Fields switch (mode & S_IFMT) { 1163e8a79fb1SJ. Bruce Fields case S_IFDIR: 1164e8a79fb1SJ. Bruce Fields inode->i_fop = &simple_dir_operations; 1165e8a79fb1SJ. Bruce Fields inode->i_op = &simple_dir_inode_operations; 1166e8a79fb1SJ. Bruce Fields inc_nlink(inode); 1167e8a79fb1SJ. Bruce Fields default: 1168e8a79fb1SJ. Bruce Fields break; 1169e8a79fb1SJ. Bruce Fields } 1170e8a79fb1SJ. Bruce Fields return inode; 1171e8a79fb1SJ. Bruce Fields } 1172e8a79fb1SJ. Bruce Fields 1173e8a79fb1SJ. Bruce Fields static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1174e8a79fb1SJ. Bruce Fields { 1175e8a79fb1SJ. Bruce Fields struct inode *inode; 1176e8a79fb1SJ. Bruce Fields 1177e8a79fb1SJ. Bruce Fields inode = nfsd_get_inode(dir->i_sb, mode); 1178e8a79fb1SJ. Bruce Fields if (!inode) 1179e8a79fb1SJ. Bruce Fields return -ENOMEM; 1180e8a79fb1SJ. Bruce Fields d_add(dentry, inode); 1181e8a79fb1SJ. Bruce Fields inc_nlink(dir); 1182e8a79fb1SJ. Bruce Fields fsnotify_mkdir(dir, dentry); 1183e8a79fb1SJ. Bruce Fields return 0; 1184e8a79fb1SJ. Bruce Fields } 1185e8a79fb1SJ. Bruce Fields 1186e8a79fb1SJ. Bruce Fields static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) 1187e8a79fb1SJ. Bruce Fields { 1188e8a79fb1SJ. Bruce Fields struct inode *dir = parent->d_inode; 1189e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1190e8a79fb1SJ. Bruce Fields int ret = -ENOMEM; 1191e8a79fb1SJ. Bruce Fields 1192e8a79fb1SJ. Bruce Fields inode_lock(dir); 1193e8a79fb1SJ. Bruce Fields dentry = d_alloc_name(parent, name); 1194e8a79fb1SJ. Bruce Fields if (!dentry) 1195e8a79fb1SJ. Bruce Fields goto out_err; 1196e8a79fb1SJ. Bruce Fields ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600); 1197e8a79fb1SJ. Bruce Fields if (ret) 1198e8a79fb1SJ. Bruce Fields goto out_err; 1199e8a79fb1SJ. Bruce Fields if (ncl) { 1200e8a79fb1SJ. Bruce Fields d_inode(dentry)->i_private = ncl; 1201e8a79fb1SJ. Bruce Fields kref_get(&ncl->cl_ref); 1202e8a79fb1SJ. Bruce Fields } 1203e8a79fb1SJ. Bruce Fields out: 1204e8a79fb1SJ. Bruce Fields inode_unlock(dir); 1205e8a79fb1SJ. Bruce Fields return dentry; 1206e8a79fb1SJ. Bruce Fields out_err: 1207e8a79fb1SJ. Bruce Fields dentry = ERR_PTR(ret); 1208e8a79fb1SJ. Bruce Fields goto out; 1209e8a79fb1SJ. Bruce Fields } 1210e8a79fb1SJ. Bruce Fields 1211*97ad4031SJ. Bruce Fields static void clear_ncl(struct inode *inode) 1212e8a79fb1SJ. Bruce Fields { 1213*97ad4031SJ. Bruce Fields struct nfsdfs_client *ncl = inode->i_private; 1214*97ad4031SJ. Bruce Fields 1215*97ad4031SJ. Bruce Fields inode->i_private = NULL; 1216*97ad4031SJ. Bruce Fields synchronize_rcu(); 1217*97ad4031SJ. Bruce Fields kref_put(&ncl->cl_ref, ncl->cl_release); 1218*97ad4031SJ. Bruce Fields } 1219*97ad4031SJ. Bruce Fields 1220*97ad4031SJ. Bruce Fields 1221*97ad4031SJ. Bruce Fields struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) 1222*97ad4031SJ. Bruce Fields { 1223*97ad4031SJ. Bruce Fields struct nfsdfs_client *nc = inode->i_private; 1224*97ad4031SJ. Bruce Fields 1225*97ad4031SJ. Bruce Fields if (nc) 1226*97ad4031SJ. Bruce Fields kref_get(&nc->cl_ref); 1227*97ad4031SJ. Bruce Fields return nc; 1228*97ad4031SJ. Bruce Fields } 1229*97ad4031SJ. Bruce Fields 1230*97ad4031SJ. Bruce Fields struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) 1231*97ad4031SJ. Bruce Fields { 1232*97ad4031SJ. Bruce Fields struct nfsdfs_client *nc; 1233*97ad4031SJ. Bruce Fields 1234*97ad4031SJ. Bruce Fields rcu_read_lock(); 1235*97ad4031SJ. Bruce Fields nc = __get_nfsdfs_client(inode); 1236*97ad4031SJ. Bruce Fields rcu_read_unlock(); 1237*97ad4031SJ. Bruce Fields return nc; 1238*97ad4031SJ. Bruce Fields } 1239*97ad4031SJ. Bruce Fields /* from __rpc_unlink */ 1240*97ad4031SJ. Bruce Fields static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) 1241*97ad4031SJ. Bruce Fields { 1242*97ad4031SJ. Bruce Fields int ret; 1243*97ad4031SJ. Bruce Fields 1244*97ad4031SJ. Bruce Fields clear_ncl(d_inode(dentry)); 1245*97ad4031SJ. Bruce Fields dget(dentry); 1246*97ad4031SJ. Bruce Fields ret = simple_unlink(dir, dentry); 1247*97ad4031SJ. Bruce Fields d_delete(dentry); 1248*97ad4031SJ. Bruce Fields dput(dentry); 1249*97ad4031SJ. Bruce Fields WARN_ON_ONCE(ret); 1250*97ad4031SJ. Bruce Fields } 1251*97ad4031SJ. Bruce Fields 1252*97ad4031SJ. Bruce Fields static void nfsdfs_remove_files(struct dentry *root) 1253*97ad4031SJ. Bruce Fields { 1254*97ad4031SJ. Bruce Fields struct dentry *dentry, *tmp; 1255*97ad4031SJ. Bruce Fields 1256*97ad4031SJ. Bruce Fields list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { 1257*97ad4031SJ. Bruce Fields if (!simple_positive(dentry)) { 1258*97ad4031SJ. Bruce Fields WARN_ON_ONCE(1); /* I think this can't happen? */ 1259*97ad4031SJ. Bruce Fields continue; 1260*97ad4031SJ. Bruce Fields } 1261*97ad4031SJ. Bruce Fields nfsdfs_remove_file(d_inode(root), dentry); 1262*97ad4031SJ. Bruce Fields } 1263*97ad4031SJ. Bruce Fields } 1264*97ad4031SJ. Bruce Fields 1265*97ad4031SJ. Bruce Fields /* XXX: cut'n'paste from simple_fill_super; figure out if we could share 1266*97ad4031SJ. Bruce Fields * code instead. */ 1267*97ad4031SJ. Bruce Fields static int nfsdfs_create_files(struct dentry *root, 1268*97ad4031SJ. Bruce Fields const struct tree_descr *files) 1269*97ad4031SJ. Bruce Fields { 1270*97ad4031SJ. Bruce Fields struct inode *dir = d_inode(root); 1271*97ad4031SJ. Bruce Fields struct inode *inode; 1272*97ad4031SJ. Bruce Fields struct dentry *dentry; 1273*97ad4031SJ. Bruce Fields int i; 1274*97ad4031SJ. Bruce Fields 1275*97ad4031SJ. Bruce Fields inode_lock(dir); 1276*97ad4031SJ. Bruce Fields for (i = 0; files->name && files->name[0]; i++, files++) { 1277*97ad4031SJ. Bruce Fields if (!files->name) 1278*97ad4031SJ. Bruce Fields continue; 1279*97ad4031SJ. Bruce Fields dentry = d_alloc_name(root, files->name); 1280*97ad4031SJ. Bruce Fields if (!dentry) 1281*97ad4031SJ. Bruce Fields goto out; 1282*97ad4031SJ. Bruce Fields inode = nfsd_get_inode(d_inode(root)->i_sb, 1283*97ad4031SJ. Bruce Fields S_IFREG | files->mode); 1284*97ad4031SJ. Bruce Fields if (!inode) { 1285*97ad4031SJ. Bruce Fields dput(dentry); 1286*97ad4031SJ. Bruce Fields goto out; 1287*97ad4031SJ. Bruce Fields } 1288*97ad4031SJ. Bruce Fields inode->i_fop = files->ops; 1289*97ad4031SJ. Bruce Fields inode->i_private = __get_nfsdfs_client(dir); 1290*97ad4031SJ. Bruce Fields d_add(dentry, inode); 1291*97ad4031SJ. Bruce Fields fsnotify_create(dir, dentry); 1292*97ad4031SJ. Bruce Fields } 1293*97ad4031SJ. Bruce Fields inode_unlock(dir); 1294*97ad4031SJ. Bruce Fields return 0; 1295*97ad4031SJ. Bruce Fields out: 1296*97ad4031SJ. Bruce Fields nfsdfs_remove_files(root); 1297*97ad4031SJ. Bruce Fields inode_unlock(dir); 1298*97ad4031SJ. Bruce Fields return -ENOMEM; 1299*97ad4031SJ. Bruce Fields } 1300*97ad4031SJ. Bruce Fields 1301*97ad4031SJ. Bruce Fields /* on success, returns positive number unique to that client. */ 1302*97ad4031SJ. Bruce Fields struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 1303*97ad4031SJ. Bruce Fields struct nfsdfs_client *ncl, u32 id, 1304*97ad4031SJ. Bruce Fields const struct tree_descr *files) 1305*97ad4031SJ. Bruce Fields { 1306*97ad4031SJ. Bruce Fields struct dentry *dentry; 1307e8a79fb1SJ. Bruce Fields char name[11]; 1308*97ad4031SJ. Bruce Fields int ret; 1309e8a79fb1SJ. Bruce Fields 1310bf5ed3e3SJ. Bruce Fields sprintf(name, "%u", id); 1311e8a79fb1SJ. Bruce Fields 1312*97ad4031SJ. Bruce Fields dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); 1313*97ad4031SJ. Bruce Fields if (IS_ERR(dentry)) /* XXX: tossing errors? */ 1314*97ad4031SJ. Bruce Fields return NULL; 1315*97ad4031SJ. Bruce Fields ret = nfsdfs_create_files(dentry, files); 1316*97ad4031SJ. Bruce Fields if (ret) { 1317*97ad4031SJ. Bruce Fields nfsd_client_rmdir(dentry); 1318*97ad4031SJ. Bruce Fields return NULL; 1319*97ad4031SJ. Bruce Fields } 1320*97ad4031SJ. Bruce Fields return dentry; 1321e8a79fb1SJ. Bruce Fields } 1322e8a79fb1SJ. Bruce Fields 1323e8a79fb1SJ. Bruce Fields /* Taken from __rpc_rmdir: */ 1324e8a79fb1SJ. Bruce Fields void nfsd_client_rmdir(struct dentry *dentry) 1325e8a79fb1SJ. Bruce Fields { 1326e8a79fb1SJ. Bruce Fields struct inode *dir = d_inode(dentry->d_parent); 1327e8a79fb1SJ. Bruce Fields struct inode *inode = d_inode(dentry); 1328e8a79fb1SJ. Bruce Fields int ret; 1329e8a79fb1SJ. Bruce Fields 1330*97ad4031SJ. Bruce Fields inode_lock(dir); 1331*97ad4031SJ. Bruce Fields nfsdfs_remove_files(dentry); 1332*97ad4031SJ. Bruce Fields clear_ncl(inode); 1333e8a79fb1SJ. Bruce Fields dget(dentry); 1334e8a79fb1SJ. Bruce Fields ret = simple_rmdir(dir, dentry); 1335e8a79fb1SJ. Bruce Fields WARN_ON_ONCE(ret); 1336e8a79fb1SJ. Bruce Fields d_delete(dentry); 1337*97ad4031SJ. Bruce Fields inode_unlock(dir); 1338e8a79fb1SJ. Bruce Fields } 1339e8a79fb1SJ. Bruce Fields 13401da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 13411da177e4SLinus Torvalds { 1342e8a79fb1SJ. Bruce Fields struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 1343e8a79fb1SJ. Bruce Fields nfsd_net_id); 1344e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1345e8a79fb1SJ. Bruce Fields int ret; 1346e8a79fb1SJ. Bruce Fields 1347cda37124SEric Biggers static const struct tree_descr nfsd_files[] = { 134896d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 1349e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1350e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 13514373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13524373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 135317efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 135417efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13551da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13561da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1357eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 135803cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 1359a2f999a3SJeff Layton [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, 136070c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 136180212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1362596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13635b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 1364b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 1365b0b0c0a2SKevin Coffman [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, 1366b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 13671da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13681da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1369efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 13700964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 13717f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 13721da177e4SLinus Torvalds #endif 13731da177e4SLinus Torvalds /* last one */ {""} 13741da177e4SLinus Torvalds }; 1375d91ee87dSEric W. Biederman get_net(sb->s_fs_info); 1376e8a79fb1SJ. Bruce Fields ret = simple_fill_super(sb, 0x6e667364, nfsd_files); 1377e8a79fb1SJ. Bruce Fields if (ret) 1378e8a79fb1SJ. Bruce Fields return ret; 1379e8a79fb1SJ. Bruce Fields dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); 1380e8a79fb1SJ. Bruce Fields if (IS_ERR(dentry)) 1381e8a79fb1SJ. Bruce Fields return PTR_ERR(dentry); 1382e8a79fb1SJ. Bruce Fields nn->nfsd_client_dir = dentry; 1383e8a79fb1SJ. Bruce Fields return 0; 1384e8a79fb1SJ. Bruce Fields 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds 1387fc14f2feSAl Viro static struct dentry *nfsd_mount(struct file_system_type *fs_type, 1388fc14f2feSAl Viro int flags, const char *dev_name, void *data) 13891da177e4SLinus Torvalds { 1390d91ee87dSEric W. Biederman struct net *net = current->nsproxy->net_ns; 1391d91ee87dSEric W. Biederman return mount_ns(fs_type, flags, data, net, net->user_ns, nfsd_fill_super); 139211f77942SStanislav Kinsbursky } 139311f77942SStanislav Kinsbursky 139411f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 139511f77942SStanislav Kinsbursky { 139611f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 139711f77942SStanislav Kinsbursky 139811f77942SStanislav Kinsbursky kill_litter_super(sb); 139911f77942SStanislav Kinsbursky put_net(net); 14001da177e4SLinus Torvalds } 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 14031da177e4SLinus Torvalds .owner = THIS_MODULE, 14041da177e4SLinus Torvalds .name = "nfsd", 1405fc14f2feSAl Viro .mount = nfsd_mount, 140611f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 14071da177e4SLinus Torvalds }; 14087f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 14091da177e4SLinus Torvalds 1410e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1411e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1412e331f606SJ. Bruce Fields { 1413e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1414e331f606SJ. Bruce Fields 1415e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1416e331f606SJ. Bruce Fields if (!entry) 1417e331f606SJ. Bruce Fields return -ENOMEM; 141896d851c4SStanislav Kinsbursky entry = proc_create("exports", 0, entry, 141996d851c4SStanislav Kinsbursky &exports_proc_operations); 1420ff7c4b36Sfanchaoting if (!entry) { 1421ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1422e331f606SJ. Bruce Fields return -ENOMEM; 1423ff7c4b36Sfanchaoting } 1424e331f606SJ. Bruce Fields return 0; 1425e331f606SJ. Bruce Fields } 1426e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1427e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1428e331f606SJ. Bruce Fields { 1429e331f606SJ. Bruce Fields return 0; 1430e331f606SJ. Bruce Fields } 1431e331f606SJ. Bruce Fields #endif 1432e331f606SJ. Bruce Fields 1433c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 14345717e012SStanislav Kinsbursky 14355717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 14365717e012SStanislav Kinsbursky { 14375717e012SStanislav Kinsbursky int retval; 14382c830dd7SJ. Bruce Fields struct vfsmount *mnt; 14393d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 14405717e012SStanislav Kinsbursky 14415717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 14425717e012SStanislav Kinsbursky if (retval) 14435717e012SStanislav Kinsbursky goto out_export_error; 1444f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1445f69adb2fSStanislav Kinsbursky if (retval) 1446f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1447e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1448e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 14493ba75830SJ. Bruce Fields retval = nfsd_reply_cache_init(nn); 14503ba75830SJ. Bruce Fields if (retval) 14513ba75830SJ. Bruce Fields goto out_drc_error; 14523bf6b57eSJ. Bruce Fields nn->nfsd4_lease = 90; /* default lease time */ 14533bf6b57eSJ. Bruce Fields nn->nfsd4_grace = 90; 145403f318caSJ. Bruce Fields nn->somebody_reclaimed = false; 1455362063a5SScott Mayhew nn->track_reclaim_completes = false; 1456ebd7c72cSJ. Bruce Fields nn->clverifier_counter = prandom_u32(); 1457bf5ed3e3SJ. Bruce Fields nn->clientid_base = prandom_u32(); 1458bf5ed3e3SJ. Bruce Fields nn->clientid_counter = nn->clientid_base + 1; 1459e0639dc5SOlga Kornievskaia nn->s2s_cp_cl_id = nn->clientid_counter++; 14602317dc55SVasily Averin 14612317dc55SVasily Averin atomic_set(&nn->ntf_refcnt, 0); 14622317dc55SVasily Averin init_waitqueue_head(&nn->ntf_wq); 14632c830dd7SJ. Bruce Fields 14642c830dd7SJ. Bruce Fields mnt = vfs_kern_mount(&nfsd_fs_type, SB_KERNMOUNT, "nfsd", NULL); 14652c830dd7SJ. Bruce Fields if (IS_ERR(mnt)) { 14662c830dd7SJ. Bruce Fields retval = PTR_ERR(mnt); 14672c830dd7SJ. Bruce Fields goto out_mount_err; 14682c830dd7SJ. Bruce Fields } 14692c830dd7SJ. Bruce Fields nn->nfsd_mnt = mnt; 14705717e012SStanislav Kinsbursky return 0; 14715717e012SStanislav Kinsbursky 14722c830dd7SJ. Bruce Fields out_mount_err: 14732c830dd7SJ. Bruce Fields nfsd_reply_cache_shutdown(nn); 14743ba75830SJ. Bruce Fields out_drc_error: 14753ba75830SJ. Bruce Fields nfsd_idmap_shutdown(net); 1476f69adb2fSStanislav Kinsbursky out_idmap_error: 1477f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 14785717e012SStanislav Kinsbursky out_export_error: 14795717e012SStanislav Kinsbursky return retval; 14805717e012SStanislav Kinsbursky } 14815717e012SStanislav Kinsbursky 14825717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 14835717e012SStanislav Kinsbursky { 14843ba75830SJ. Bruce Fields struct nfsd_net *nn = net_generic(net, nfsd_net_id); 14853ba75830SJ. Bruce Fields 14862c830dd7SJ. Bruce Fields mntput(nn->nfsd_mnt); 14873ba75830SJ. Bruce Fields nfsd_reply_cache_shutdown(nn); 1488f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 14895717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1490e333f3bbSTrond Myklebust nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); 14915717e012SStanislav Kinsbursky } 14925717e012SStanislav Kinsbursky 14937ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 14945717e012SStanislav Kinsbursky .init = nfsd_init_net, 14955717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 14967ea34ac1SJeff Layton .id = &nfsd_net_id, 14977ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 14987ea34ac1SJeff Layton }; 14997ea34ac1SJeff Layton 15001da177e4SLinus Torvalds static int __init init_nfsd(void) 15011da177e4SLinus Torvalds { 15021da177e4SLinus Torvalds int retval; 15031da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 15041da177e4SLinus Torvalds 15057ea34ac1SJeff Layton retval = register_pernet_subsys(&nfsd_net_ops); 15067ea34ac1SJeff Layton if (retval < 0) 1507bb7ffbf2SGiuseppe Cantavenera return retval; 1508bb7ffbf2SGiuseppe Cantavenera retval = register_cld_notifier(); 1509e8ff2a84SJ. Bruce Fields if (retval) 15107ea34ac1SJeff Layton goto out_unregister_pernet; 1511bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1512bb7ffbf2SGiuseppe Cantavenera if (retval) 1513bb7ffbf2SGiuseppe Cantavenera goto out_unregister_notifier; 15149cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 151565178db4SBryan Schumaker if (retval) 151665178db4SBryan Schumaker goto out_free_slabs; 15179cf514ccSChristoph Hellwig retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ 15189cf514ccSChristoph Hellwig if (retval) 15199cf514ccSChristoph Hellwig goto out_exit_pnfs; 15201da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 15211da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1522e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1523e331f606SJ. Bruce Fields if (retval) 1524f69adb2fSStanislav Kinsbursky goto out_free_lockd; 15251da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 152626808d3fSJ. Bruce Fields if (retval) 152726808d3fSJ. Bruce Fields goto out_free_all; 152826808d3fSJ. Bruce Fields return 0; 152926808d3fSJ. Bruce Fields out_free_all: 15301da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15311da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1532dbf847ecSJ. Bruce Fields out_free_lockd: 15331da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1534d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 153565178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 15369cf514ccSChristoph Hellwig out_exit_pnfs: 15379cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 153865178db4SBryan Schumaker out_free_slabs: 153946b25895SJ. Bruce Fields nfsd4_free_slabs(); 1540813fd320SJeff Layton out_unregister_notifier: 1541797a9d79SJeff Layton unregister_cld_notifier(); 1542bb7ffbf2SGiuseppe Cantavenera out_unregister_pernet: 1543bb7ffbf2SGiuseppe Cantavenera unregister_pernet_subsys(&nfsd_net_ops); 15441da177e4SLinus Torvalds return retval; 15451da177e4SLinus Torvalds } 15461da177e4SLinus Torvalds 15471da177e4SLinus Torvalds static void __exit exit_nfsd(void) 15481da177e4SLinus Torvalds { 15491da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 15501da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 15511da177e4SLinus Torvalds nfsd_stat_shutdown(); 15521da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1553e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 15549cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 155565178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 15561da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 1557797a9d79SJeff Layton unregister_cld_notifier(); 1558bb7ffbf2SGiuseppe Cantavenera unregister_pernet_subsys(&nfsd_net_ops); 15591da177e4SLinus Torvalds } 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 15621da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 15631da177e4SLinus Torvalds module_init(init_nfsd) 15641da177e4SLinus Torvalds module_exit(exit_nfsd) 1565