11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/nfsd/nfsctl.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Syscall interface to knfsd. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 71da177e4SLinus Torvalds */ 81da177e4SLinus Torvalds 93f8206d4SAl Viro #include <linux/namei.h> 10b41b66d6SNeilBrown #include <linux/ctype.h> 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/nfsd_idmap.h> 1380212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 141da177e4SLinus Torvalds #include <linux/nfsd/syscall.h> 154373ea84SWendy Cheng #include <linux/lockd/lockd.h> 164116092bSChuck Lever #include <linux/sunrpc/clnt.h> 171da177e4SLinus Torvalds 189a74af21SBoaz Harrosh #include "nfsd.h" 199a74af21SBoaz Harrosh #include "cache.h" 209a74af21SBoaz Harrosh 211da177e4SLinus Torvalds /* 221da177e4SLinus Torvalds * We have a single directory with 9 nodes in it. 231da177e4SLinus Torvalds */ 241da177e4SLinus Torvalds enum { 251da177e4SLinus Torvalds NFSD_Root = 1, 261da177e4SLinus Torvalds NFSD_Svc, 271da177e4SLinus Torvalds NFSD_Add, 281da177e4SLinus Torvalds NFSD_Del, 291da177e4SLinus Torvalds NFSD_Export, 301da177e4SLinus Torvalds NFSD_Unexport, 311da177e4SLinus Torvalds NFSD_Getfd, 321da177e4SLinus Torvalds NFSD_Getfs, 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, 4170c3b76cSNeilBrown NFSD_Versions, 4280212d59SNeilBrown NFSD_Ports, 43596bbe53SNeilBrown NFSD_MaxBlkSize, 4470c3b76cSNeilBrown /* 4570c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4670c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 4770c3b76cSNeilBrown */ 4870c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 491da177e4SLinus Torvalds NFSD_Leasetime, 500964a3d3SNeilBrown NFSD_RecoveryDir, 5170c3b76cSNeilBrown #endif 521da177e4SLinus Torvalds }; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds /* 551da177e4SLinus Torvalds * write() for these nodes. 561da177e4SLinus Torvalds */ 571da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size); 581da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size); 591da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size); 601da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size); 611da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size); 621da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size); 631da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size); 641da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 65b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 66b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 671da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 68eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 6970c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 7080212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 71596bbe53SNeilBrown static ssize_t write_maxblksize(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); 740964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 7570c3b76cSNeilBrown #endif 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 781da177e4SLinus Torvalds [NFSD_Svc] = write_svc, 791da177e4SLinus Torvalds [NFSD_Add] = write_add, 801da177e4SLinus Torvalds [NFSD_Del] = write_del, 811da177e4SLinus Torvalds [NFSD_Export] = write_export, 821da177e4SLinus Torvalds [NFSD_Unexport] = write_unexport, 831da177e4SLinus Torvalds [NFSD_Getfd] = write_getfd, 841da177e4SLinus Torvalds [NFSD_Getfs] = write_getfs, 851da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 86b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 87b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 881da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 89eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 9070c3b76cSNeilBrown [NFSD_Versions] = write_versions, 9180212d59SNeilBrown [NFSD_Ports] = write_ports, 92596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 9370c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 941da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 950964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 9670c3b76cSNeilBrown #endif 971da177e4SLinus Torvalds }; 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1001da177e4SLinus Torvalds { 1017eaa36e2SJosef "Jeff" Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 1021da177e4SLinus Torvalds char *data; 1031da177e4SLinus Torvalds ssize_t rv; 1041da177e4SLinus Torvalds 105e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1061da177e4SLinus Torvalds return -EINVAL; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1091da177e4SLinus Torvalds if (IS_ERR(data)) 1101da177e4SLinus Torvalds return PTR_ERR(data); 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1138971a101SNeilBrown if (rv >= 0) { 1141da177e4SLinus Torvalds simple_transaction_set(file, rv); 1151da177e4SLinus Torvalds rv = size; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds return rv; 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 1207390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1217390022dSNeilBrown { 1227390022dSNeilBrown if (! file->private_data) { 1237390022dSNeilBrown /* An attempt to read a transaction file without writing 1247390022dSNeilBrown * causes a 0-byte write so that the file can return 1257390022dSNeilBrown * state information 1267390022dSNeilBrown */ 1277390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1287390022dSNeilBrown if (rv < 0) 1297390022dSNeilBrown return rv; 1307390022dSNeilBrown } 1317390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1327390022dSNeilBrown } 1337390022dSNeilBrown 1344b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1351da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1367390022dSNeilBrown .read = nfsctl_transaction_read, 1371da177e4SLinus Torvalds .release = simple_transaction_release, 1381da177e4SLinus Torvalds }; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds static int exports_open(struct inode *inode, struct file *file) 1411da177e4SLinus Torvalds { 1421da177e4SLinus Torvalds return seq_open(file, &nfs_exports_op); 1431da177e4SLinus Torvalds } 1441da177e4SLinus Torvalds 1454b6f5d20SArjan van de Ven static const struct file_operations exports_operations = { 1461da177e4SLinus Torvalds .open = exports_open, 1471da177e4SLinus Torvalds .read = seq_read, 1481da177e4SLinus Torvalds .llseek = seq_lseek, 1491da177e4SLinus Torvalds .release = seq_release, 1509ef2db26SDenis V. Lunev .owner = THIS_MODULE, 1511da177e4SLinus Torvalds }; 1521da177e4SLinus Torvalds 153e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 154e8e8753fSJ. Bruce Fields { 155e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 156e8e8753fSJ. Bruce Fields return 0; 157e8e8753fSJ. Bruce Fields } 158e8e8753fSJ. Bruce Fields 159e8e8753fSJ. Bruce Fields static int export_features_open(struct inode *inode, struct file *file) 160e8e8753fSJ. Bruce Fields { 161e8e8753fSJ. Bruce Fields return single_open(file, export_features_show, NULL); 162e8e8753fSJ. Bruce Fields } 163e8e8753fSJ. Bruce Fields 164e8e8753fSJ. Bruce Fields static struct file_operations export_features_operations = { 165e8e8753fSJ. Bruce Fields .open = export_features_open, 166e8e8753fSJ. Bruce Fields .read = seq_read, 167e8e8753fSJ. Bruce Fields .llseek = seq_lseek, 168e8e8753fSJ. Bruce Fields .release = single_release, 169e8e8753fSJ. Bruce Fields }; 170e8e8753fSJ. Bruce Fields 17103cf6c9fSGreg Banks extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); 172ed2d8aedSRyusei Yamaguchi extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); 17303cf6c9fSGreg Banks 174828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 17503cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 17603cf6c9fSGreg Banks .read = seq_read, 17703cf6c9fSGreg Banks .llseek = seq_lseek, 178ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 17903cf6c9fSGreg Banks .owner = THIS_MODULE, 18003cf6c9fSGreg Banks }; 18103cf6c9fSGreg Banks 1821da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 1831da177e4SLinus Torvalds /* 1841da177e4SLinus Torvalds * payload - write methods 1851da177e4SLinus Torvalds */ 1861da177e4SLinus Torvalds 187262a0982SChuck Lever /** 188262a0982SChuck Lever * write_svc - Start kernel's NFSD server 189262a0982SChuck Lever * 190262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/threads is preferred. 191262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 192262a0982SChuck Lever * 193262a0982SChuck Lever * Input: 194262a0982SChuck Lever * buf: struct nfsctl_svc 195262a0982SChuck Lever * svc_port: port number of this 196262a0982SChuck Lever * server's listener 197262a0982SChuck Lever * svc_nthreads: number of threads to start 198262a0982SChuck Lever * size: size in bytes of passed in nfsctl_svc 199262a0982SChuck Lever * Output: 200262a0982SChuck Lever * On success: returns zero 201262a0982SChuck Lever * On error: return code is negative errno value 202262a0982SChuck Lever */ 2031da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size) 2041da177e4SLinus Torvalds { 2051da177e4SLinus Torvalds struct nfsctl_svc *data; 20682e12fe9SNeilBrown int err; 2071da177e4SLinus Torvalds if (size < sizeof(*data)) 2081da177e4SLinus Torvalds return -EINVAL; 2091da177e4SLinus Torvalds data = (struct nfsctl_svc*) buf; 21082e12fe9SNeilBrown err = nfsd_svc(data->svc_port, data->svc_nthreads); 21182e12fe9SNeilBrown if (err < 0) 21282e12fe9SNeilBrown return err; 21382e12fe9SNeilBrown return 0; 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds 216262a0982SChuck Lever /** 217262a0982SChuck Lever * write_add - Add or modify client entry in auth unix cache 218262a0982SChuck Lever * 219262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 220262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 221262a0982SChuck Lever * 222262a0982SChuck Lever * Input: 223262a0982SChuck Lever * buf: struct nfsctl_client 224262a0982SChuck Lever * cl_ident: '\0'-terminated C string 225262a0982SChuck Lever * containing domain name 226262a0982SChuck Lever * of client 227262a0982SChuck Lever * cl_naddr: no. of items in cl_addrlist 228262a0982SChuck Lever * cl_addrlist: array of client addresses 229262a0982SChuck Lever * cl_fhkeytype: ignored 230262a0982SChuck Lever * cl_fhkeylen: ignored 231262a0982SChuck Lever * cl_fhkey: ignored 232262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 233262a0982SChuck Lever * Output: 234262a0982SChuck Lever * On success: returns zero 235262a0982SChuck Lever * On error: return code is negative errno value 236262a0982SChuck Lever * 237262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 238262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 239262a0982SChuck Lever */ 2401da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size) 2411da177e4SLinus Torvalds { 2421da177e4SLinus Torvalds struct nfsctl_client *data; 2431da177e4SLinus Torvalds if (size < sizeof(*data)) 2441da177e4SLinus Torvalds return -EINVAL; 2451da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2461da177e4SLinus Torvalds return exp_addclient(data); 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 249262a0982SChuck Lever /** 250262a0982SChuck Lever * write_del - Remove client from auth unix cache 251262a0982SChuck Lever * 252262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 253262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 254262a0982SChuck Lever * 255262a0982SChuck Lever * Input: 256262a0982SChuck Lever * buf: struct nfsctl_client 257262a0982SChuck Lever * cl_ident: '\0'-terminated C string 258262a0982SChuck Lever * containing domain name 259262a0982SChuck Lever * of client 260262a0982SChuck Lever * cl_naddr: ignored 261262a0982SChuck Lever * cl_addrlist: ignored 262262a0982SChuck Lever * cl_fhkeytype: ignored 263262a0982SChuck Lever * cl_fhkeylen: ignored 264262a0982SChuck Lever * cl_fhkey: ignored 265262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 266262a0982SChuck Lever * Output: 267262a0982SChuck Lever * On success: returns zero 268262a0982SChuck Lever * On error: return code is negative errno value 269262a0982SChuck Lever * 270262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 271262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 272262a0982SChuck Lever */ 2731da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size) 2741da177e4SLinus Torvalds { 2751da177e4SLinus Torvalds struct nfsctl_client *data; 2761da177e4SLinus Torvalds if (size < sizeof(*data)) 2771da177e4SLinus Torvalds return -EINVAL; 2781da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2791da177e4SLinus Torvalds return exp_delclient(data); 2801da177e4SLinus Torvalds } 2811da177e4SLinus Torvalds 282262a0982SChuck Lever /** 283262a0982SChuck Lever * write_export - Export part or all of a local file system 284262a0982SChuck Lever * 285262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 286262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 287262a0982SChuck Lever * 288262a0982SChuck Lever * Input: 289262a0982SChuck Lever * buf: struct nfsctl_export 290262a0982SChuck Lever * ex_client: '\0'-terminated C string 291262a0982SChuck Lever * containing domain name 292262a0982SChuck Lever * of client allowed to access 293262a0982SChuck Lever * this export 294262a0982SChuck Lever * ex_path: '\0'-terminated C string 295262a0982SChuck Lever * containing pathname of 296262a0982SChuck Lever * directory in local file system 297262a0982SChuck Lever * ex_dev: fsid to use for this export 298262a0982SChuck Lever * ex_ino: ignored 299262a0982SChuck Lever * ex_flags: export flags for this export 300262a0982SChuck Lever * ex_anon_uid: UID to use for anonymous 301262a0982SChuck Lever * requests 302262a0982SChuck Lever * ex_anon_gid: GID to use for anonymous 303262a0982SChuck Lever * requests 304262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 305262a0982SChuck Lever * Output: 306262a0982SChuck Lever * On success: returns zero 307262a0982SChuck Lever * On error: return code is negative errno value 308262a0982SChuck Lever */ 3091da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size) 3101da177e4SLinus Torvalds { 3111da177e4SLinus Torvalds struct nfsctl_export *data; 3121da177e4SLinus Torvalds if (size < sizeof(*data)) 3131da177e4SLinus Torvalds return -EINVAL; 3141da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3151da177e4SLinus Torvalds return exp_export(data); 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds 318262a0982SChuck Lever /** 319262a0982SChuck Lever * write_unexport - Unexport a previously exported file system 320262a0982SChuck Lever * 321262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 322262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 323262a0982SChuck Lever * 324262a0982SChuck Lever * Input: 325262a0982SChuck Lever * buf: struct nfsctl_export 326262a0982SChuck Lever * ex_client: '\0'-terminated C string 327262a0982SChuck Lever * containing domain name 328262a0982SChuck Lever * of client no longer allowed 329262a0982SChuck Lever * to access this export 330262a0982SChuck Lever * ex_path: '\0'-terminated C string 331262a0982SChuck Lever * containing pathname of 332262a0982SChuck Lever * directory in local file system 333262a0982SChuck Lever * ex_dev: ignored 334262a0982SChuck Lever * ex_ino: ignored 335262a0982SChuck Lever * ex_flags: ignored 336262a0982SChuck Lever * ex_anon_uid: ignored 337262a0982SChuck Lever * ex_anon_gid: ignored 338262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 339262a0982SChuck Lever * Output: 340262a0982SChuck Lever * On success: returns zero 341262a0982SChuck Lever * On error: return code is negative errno value 342262a0982SChuck Lever */ 3431da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size) 3441da177e4SLinus Torvalds { 3451da177e4SLinus Torvalds struct nfsctl_export *data; 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds if (size < sizeof(*data)) 3481da177e4SLinus Torvalds return -EINVAL; 3491da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3501da177e4SLinus Torvalds return exp_unexport(data); 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 353262a0982SChuck Lever /** 354262a0982SChuck Lever * write_getfs - Get a variable-length NFS file handle by path 355262a0982SChuck Lever * 356262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 357262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 358262a0982SChuck Lever * 359262a0982SChuck Lever * Input: 360262a0982SChuck Lever * buf: struct nfsctl_fsparm 361262a0982SChuck Lever * gd_addr: socket address of client 362262a0982SChuck Lever * gd_path: '\0'-terminated C string 363262a0982SChuck Lever * containing pathname of 364262a0982SChuck Lever * directory in local file system 365262a0982SChuck Lever * gd_maxlen: maximum size of returned file 366262a0982SChuck Lever * handle 367262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fsparm 368262a0982SChuck Lever * Output: 369262a0982SChuck Lever * On success: passed-in buffer filled with a knfsd_fh structure 370262a0982SChuck Lever * (a variable-length raw NFS file handle); 371262a0982SChuck Lever * return code is the size in bytes of the file handle 372262a0982SChuck Lever * On error: return code is negative errno value 373262a0982SChuck Lever * 374262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 375262a0982SChuck Lever * is the same size as a struct sockaddr_in. 376262a0982SChuck Lever */ 3771da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size) 3781da177e4SLinus Torvalds { 3791da177e4SLinus Torvalds struct nfsctl_fsparm *data; 3801da177e4SLinus Torvalds struct sockaddr_in *sin; 3811da177e4SLinus Torvalds struct auth_domain *clp; 3821da177e4SLinus Torvalds int err = 0; 3831da177e4SLinus Torvalds struct knfsd_fh *res; 384f15364bdSAurélien Charbon struct in6_addr in6; 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds if (size < sizeof(*data)) 3871da177e4SLinus Torvalds return -EINVAL; 3881da177e4SLinus Torvalds data = (struct nfsctl_fsparm*)buf; 3891da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 3901da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 3911da177e4SLinus Torvalds goto out; 3921da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 3931da177e4SLinus Torvalds if (data->gd_maxlen > NFS3_FHSIZE) 3941da177e4SLinus Torvalds data->gd_maxlen = NFS3_FHSIZE; 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds res = (struct knfsd_fh*)buf; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds exp_readlock(); 399f15364bdSAurélien Charbon 400f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 401f15364bdSAurélien Charbon 402f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 403f15364bdSAurélien Charbon if (!clp) 4041da177e4SLinus Torvalds err = -EPERM; 4051da177e4SLinus Torvalds else { 4061da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); 4071da177e4SLinus Torvalds auth_domain_put(clp); 4081da177e4SLinus Torvalds } 4091da177e4SLinus Torvalds exp_readunlock(); 4101da177e4SLinus Torvalds if (err == 0) 41112127498SAndrew Morton err = res->fh_size + offsetof(struct knfsd_fh, fh_base); 4121da177e4SLinus Torvalds out: 4131da177e4SLinus Torvalds return err; 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 416262a0982SChuck Lever /** 417262a0982SChuck Lever * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) 418262a0982SChuck Lever * 419262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 420262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 421262a0982SChuck Lever * 422262a0982SChuck Lever * Input: 423262a0982SChuck Lever * buf: struct nfsctl_fdparm 424262a0982SChuck Lever * gd_addr: socket address of client 425262a0982SChuck Lever * gd_path: '\0'-terminated C string 426262a0982SChuck Lever * containing pathname of 427262a0982SChuck Lever * directory in local file system 428262a0982SChuck Lever * gd_version: fdparm structure version 429262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fdparm 430262a0982SChuck Lever * Output: 431262a0982SChuck Lever * On success: passed-in buffer filled with nfsctl_res 432262a0982SChuck Lever * (a fixed-length raw NFS file handle); 433262a0982SChuck Lever * return code is the size in bytes of the file handle 434262a0982SChuck Lever * On error: return code is negative errno value 435262a0982SChuck Lever * 436262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 437262a0982SChuck Lever * is the same size as a struct sockaddr_in. 438262a0982SChuck Lever */ 4391da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size) 4401da177e4SLinus Torvalds { 4411da177e4SLinus Torvalds struct nfsctl_fdparm *data; 4421da177e4SLinus Torvalds struct sockaddr_in *sin; 4431da177e4SLinus Torvalds struct auth_domain *clp; 4441da177e4SLinus Torvalds int err = 0; 4451da177e4SLinus Torvalds struct knfsd_fh fh; 4461da177e4SLinus Torvalds char *res; 447f15364bdSAurélien Charbon struct in6_addr in6; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds if (size < sizeof(*data)) 4501da177e4SLinus Torvalds return -EINVAL; 4511da177e4SLinus Torvalds data = (struct nfsctl_fdparm*)buf; 4521da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 4531da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 4541da177e4SLinus Torvalds goto out; 4551da177e4SLinus Torvalds err = -EINVAL; 4561da177e4SLinus Torvalds if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) 4571da177e4SLinus Torvalds goto out; 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds res = buf; 4601da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 4611da177e4SLinus Torvalds exp_readlock(); 462f15364bdSAurélien Charbon 463f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 464f15364bdSAurélien Charbon 465f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 466f15364bdSAurélien Charbon if (!clp) 4671da177e4SLinus Torvalds err = -EPERM; 4681da177e4SLinus Torvalds else { 4691da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); 4701da177e4SLinus Torvalds auth_domain_put(clp); 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds exp_readunlock(); 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds if (err == 0) { 4751da177e4SLinus Torvalds memset(res,0, NFS_FHSIZE); 4761da177e4SLinus Torvalds memcpy(res, &fh.fh_base, fh.fh_size); 4771da177e4SLinus Torvalds err = NFS_FHSIZE; 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds out: 4801da177e4SLinus Torvalds return err; 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds 483262a0982SChuck Lever /** 484262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 485262a0982SChuck Lever * 486262a0982SChuck Lever * Experimental. 487262a0982SChuck Lever * 488262a0982SChuck Lever * Input: 489262a0982SChuck Lever * buf: '\n'-terminated C string containing a 4904116092bSChuck Lever * presentation format IP address 491262a0982SChuck Lever * size: length of C string in @buf 492262a0982SChuck Lever * Output: 493262a0982SChuck Lever * On success: returns zero if all specified locks were released; 494262a0982SChuck Lever * returns one if one or more locks were not released 495262a0982SChuck Lever * On error: return code is negative errno value 496262a0982SChuck Lever */ 497b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 4984373ea84SWendy Cheng { 4994116092bSChuck Lever struct sockaddr_storage address; 5004116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 5014116092bSChuck Lever size_t salen = sizeof(address); 502367c8c7bSChuck Lever char *fo_path; 5034373ea84SWendy Cheng 5044373ea84SWendy Cheng /* sanity check */ 5054373ea84SWendy Cheng if (size == 0) 5064373ea84SWendy Cheng return -EINVAL; 5074373ea84SWendy Cheng 5084373ea84SWendy Cheng if (buf[size-1] != '\n') 5094373ea84SWendy Cheng return -EINVAL; 5104373ea84SWendy Cheng 5114373ea84SWendy Cheng fo_path = buf; 5124373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 5134373ea84SWendy Cheng return -EINVAL; 5144373ea84SWendy Cheng 5154116092bSChuck Lever if (rpc_pton(fo_path, size, sap, salen) == 0) 5164373ea84SWendy Cheng return -EINVAL; 5174373ea84SWendy Cheng 5184116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 5194373ea84SWendy Cheng } 5204373ea84SWendy Cheng 521262a0982SChuck Lever /** 522262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 523262a0982SChuck Lever * 524262a0982SChuck Lever * Experimental. 525262a0982SChuck Lever * 526262a0982SChuck Lever * Input: 527262a0982SChuck Lever * buf: '\n'-terminated C string containing the 528262a0982SChuck Lever * absolute pathname of a local file system 529262a0982SChuck Lever * size: length of C string in @buf 530262a0982SChuck Lever * Output: 531262a0982SChuck Lever * On success: returns zero if all specified locks were released; 532262a0982SChuck Lever * returns one if one or more locks were not released 533262a0982SChuck Lever * On error: return code is negative errno value 534262a0982SChuck Lever */ 535b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 53617efa372SWendy Cheng { 537a63bb996SAl Viro struct path path; 53817efa372SWendy Cheng char *fo_path; 53917efa372SWendy Cheng int error; 54017efa372SWendy Cheng 54117efa372SWendy Cheng /* sanity check */ 54217efa372SWendy Cheng if (size == 0) 54317efa372SWendy Cheng return -EINVAL; 54417efa372SWendy Cheng 54517efa372SWendy Cheng if (buf[size-1] != '\n') 54617efa372SWendy Cheng return -EINVAL; 54717efa372SWendy Cheng 54817efa372SWendy Cheng fo_path = buf; 54917efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 55017efa372SWendy Cheng return -EINVAL; 55117efa372SWendy Cheng 552a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 55317efa372SWendy Cheng if (error) 55417efa372SWendy Cheng return error; 55517efa372SWendy Cheng 556262a0982SChuck Lever /* 557262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 558262a0982SChuck Lever * releasing locks on the wrong file system. 559262a0982SChuck Lever * 560262a0982SChuck Lever * For example: 561262a0982SChuck Lever * 1. Does the path refer to a directory? 562262a0982SChuck Lever * 2. Is that directory a mount point, or 563262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 564262a0982SChuck Lever */ 565a63bb996SAl Viro error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); 56617efa372SWendy Cheng 567a63bb996SAl Viro path_put(&path); 56817efa372SWendy Cheng return error; 56917efa372SWendy Cheng } 57017efa372SWendy Cheng 571262a0982SChuck Lever /** 572262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 573262a0982SChuck Lever * 574262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 575262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 576262a0982SChuck Lever * contain escape sequences. 577262a0982SChuck Lever * 578262a0982SChuck Lever * Input: 579262a0982SChuck Lever * buf: 580262a0982SChuck Lever * domain: client domain name 581262a0982SChuck Lever * path: export pathname 582262a0982SChuck Lever * maxsize: numeric maximum size of 583262a0982SChuck Lever * @buf 584262a0982SChuck Lever * size: length of C string in @buf 585262a0982SChuck Lever * Output: 586262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 587262a0982SChuck Lever * string containing a ASCII hex text version 588262a0982SChuck Lever * of the NFS file handle; 589262a0982SChuck Lever * return code is the size in bytes of the string 590262a0982SChuck Lever * On error: return code is negative errno value 591262a0982SChuck Lever */ 5921da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 5931da177e4SLinus Torvalds { 5941da177e4SLinus Torvalds char *dname, *path; 595246d95baSAndrew Morton int uninitialized_var(maxsize); 5961da177e4SLinus Torvalds char *mesg = buf; 5971da177e4SLinus Torvalds int len; 5981da177e4SLinus Torvalds struct auth_domain *dom; 5991da177e4SLinus Torvalds struct knfsd_fh fh; 6001da177e4SLinus Torvalds 60187d26ea7SJ. Bruce Fields if (size == 0) 60287d26ea7SJ. Bruce Fields return -EINVAL; 60387d26ea7SJ. Bruce Fields 6041da177e4SLinus Torvalds if (buf[size-1] != '\n') 6051da177e4SLinus Torvalds return -EINVAL; 6061da177e4SLinus Torvalds buf[size-1] = 0; 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds dname = mesg; 6091da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 61054224f04SChuck Lever if (len <= 0) 61154224f04SChuck Lever return -EINVAL; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds path = dname+len+1; 6141da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 61554224f04SChuck Lever if (len <= 0) 61654224f04SChuck Lever return -EINVAL; 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 6191da177e4SLinus Torvalds if (len) 6201da177e4SLinus Torvalds return len; 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 6231da177e4SLinus Torvalds return -EINVAL; 6241da177e4SLinus Torvalds if (maxsize > NFS3_FHSIZE) 6251da177e4SLinus Torvalds maxsize = NFS3_FHSIZE; 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 6281da177e4SLinus Torvalds return -EINVAL; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 6311da177e4SLinus Torvalds dom = unix_domain_find(dname); 6321da177e4SLinus Torvalds if (!dom) 6331da177e4SLinus Torvalds return -ENOMEM; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds len = exp_rootfh(dom, path, &fh, maxsize); 6361da177e4SLinus Torvalds auth_domain_put(dom); 6371da177e4SLinus Torvalds if (len) 6381da177e4SLinus Torvalds return len; 6391da177e4SLinus Torvalds 64054224f04SChuck Lever mesg = buf; 64154224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 6421da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 6431da177e4SLinus Torvalds mesg[-1] = '\n'; 6441da177e4SLinus Torvalds return mesg - buf; 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds 647262a0982SChuck Lever /** 648262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 649262a0982SChuck Lever * 650262a0982SChuck Lever * Input: 651262a0982SChuck Lever * buf: ignored 652262a0982SChuck Lever * size: zero 653262a0982SChuck Lever * Output: 654262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 655262a0982SChuck Lever * string numeric value representing the number of 656262a0982SChuck Lever * running NFSD threads; 657262a0982SChuck Lever * return code is the size in bytes of the string 658262a0982SChuck Lever * On error: return code is zero 659262a0982SChuck Lever * 660262a0982SChuck Lever * OR 661262a0982SChuck Lever * 662262a0982SChuck Lever * Input: 663262a0982SChuck Lever * buf: C string containing an unsigned 664262a0982SChuck Lever * integer value representing the 665262a0982SChuck Lever * number of NFSD threads to start 666262a0982SChuck Lever * size: non-zero length of C string in @buf 667262a0982SChuck Lever * Output: 668262a0982SChuck Lever * On success: NFS service is started; 669262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 670262a0982SChuck Lever * string numeric value representing the number of 671262a0982SChuck Lever * running NFSD threads; 672262a0982SChuck Lever * return code is the size in bytes of the string 673262a0982SChuck Lever * On error: return code is zero or a negative errno value 674262a0982SChuck Lever */ 6751da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 6761da177e4SLinus Torvalds { 6771da177e4SLinus Torvalds char *mesg = buf; 6781da177e4SLinus Torvalds int rv; 6791da177e4SLinus Torvalds if (size > 0) { 6801da177e4SLinus Torvalds int newthreads; 6811da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 6821da177e4SLinus Torvalds if (rv) 6831da177e4SLinus Torvalds return rv; 6841da177e4SLinus Torvalds if (newthreads < 0) 6851da177e4SLinus Torvalds return -EINVAL; 6869e074856SChuck Lever rv = nfsd_svc(NFS_PORT, newthreads); 68782e12fe9SNeilBrown if (rv < 0) 6881da177e4SLinus Torvalds return rv; 68982e12fe9SNeilBrown } else 69082e12fe9SNeilBrown rv = nfsd_nrthreads(); 691e06b6405SChuck Lever 69282e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds 695262a0982SChuck Lever /** 696262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 697262a0982SChuck Lever * 698262a0982SChuck Lever * Input: 699262a0982SChuck Lever * buf: ignored 700262a0982SChuck Lever * size: zero 701262a0982SChuck Lever * 702262a0982SChuck Lever * OR 703262a0982SChuck Lever * 704262a0982SChuck Lever * Input: 705262a0982SChuck Lever * buf: C string containing whitespace- 706262a0982SChuck Lever * separated unsigned integer values 707262a0982SChuck Lever * representing the number of NFSD 708262a0982SChuck Lever * threads to start in each pool 709262a0982SChuck Lever * size: non-zero length of C string in @buf 710262a0982SChuck Lever * Output: 711262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 712262a0982SChuck Lever * string containing integer values representing the 713262a0982SChuck Lever * number of NFSD threads in each pool; 714262a0982SChuck Lever * return code is the size in bytes of the string 715262a0982SChuck Lever * On error: return code is zero or a negative errno value 716262a0982SChuck Lever */ 717eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 718eed2965aSGreg Banks { 719eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 720eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 721eed2965aSGreg Banks */ 722eed2965aSGreg Banks char *mesg = buf; 723eed2965aSGreg Banks int i; 724eed2965aSGreg Banks int rv; 725eed2965aSGreg Banks int len; 726bedbdd8bSNeil Brown int npools; 727eed2965aSGreg Banks int *nthreads; 728eed2965aSGreg Banks 729bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 730bedbdd8bSNeil Brown npools = nfsd_nrpools(); 731eed2965aSGreg Banks if (npools == 0) { 732eed2965aSGreg Banks /* 733eed2965aSGreg Banks * NFS is shut down. The admin can start it by 734eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 735eed2965aSGreg Banks * file, sorry. Report zero threads. 736eed2965aSGreg Banks */ 737bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 738eed2965aSGreg Banks strcpy(buf, "0\n"); 739eed2965aSGreg Banks return strlen(buf); 740eed2965aSGreg Banks } 741eed2965aSGreg Banks 742eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 743bedbdd8bSNeil Brown rv = -ENOMEM; 744eed2965aSGreg Banks if (nthreads == NULL) 745bedbdd8bSNeil Brown goto out_free; 746eed2965aSGreg Banks 747eed2965aSGreg Banks if (size > 0) { 748eed2965aSGreg Banks for (i = 0; i < npools; i++) { 749eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 750eed2965aSGreg Banks if (rv == -ENOENT) 751eed2965aSGreg Banks break; /* fewer numbers than pools */ 752eed2965aSGreg Banks if (rv) 753eed2965aSGreg Banks goto out_free; /* syntax error */ 754eed2965aSGreg Banks rv = -EINVAL; 755eed2965aSGreg Banks if (nthreads[i] < 0) 756eed2965aSGreg Banks goto out_free; 757eed2965aSGreg Banks } 758eed2965aSGreg Banks rv = nfsd_set_nrthreads(i, nthreads); 759eed2965aSGreg Banks if (rv) 760eed2965aSGreg Banks goto out_free; 761eed2965aSGreg Banks } 762eed2965aSGreg Banks 763eed2965aSGreg Banks rv = nfsd_get_nrthreads(npools, nthreads); 764eed2965aSGreg Banks if (rv) 765eed2965aSGreg Banks goto out_free; 766eed2965aSGreg Banks 767eed2965aSGreg Banks mesg = buf; 768eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 769eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 770eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 771eed2965aSGreg Banks len = strlen(mesg); 772eed2965aSGreg Banks size -= len; 773eed2965aSGreg Banks mesg += len; 774eed2965aSGreg Banks } 775413d63d7SJ. Bruce Fields rv = mesg - buf; 776eed2965aSGreg Banks out_free: 777eed2965aSGreg Banks kfree(nthreads); 778bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 779eed2965aSGreg Banks return rv; 780eed2965aSGreg Banks } 781eed2965aSGreg Banks 7823dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 78370c3b76cSNeilBrown { 78470c3b76cSNeilBrown char *mesg = buf; 7858daf220aSBenny Halevy char *vers, *minorp, sign; 786261758b5SChuck Lever int len, num, remaining; 7878daf220aSBenny Halevy unsigned minor; 78870c3b76cSNeilBrown ssize_t tlen = 0; 78970c3b76cSNeilBrown char *sep; 79070c3b76cSNeilBrown 79170c3b76cSNeilBrown if (size>0) { 79270c3b76cSNeilBrown if (nfsd_serv) 7936658d3a7SNeilBrown /* Cannot change versions without updating 7946658d3a7SNeilBrown * nfsd_serv->sv_xdrsize, and reallocing 7956658d3a7SNeilBrown * rq_argp and rq_resp 7966658d3a7SNeilBrown */ 79770c3b76cSNeilBrown return -EBUSY; 79870c3b76cSNeilBrown if (buf[size-1] != '\n') 79970c3b76cSNeilBrown return -EINVAL; 80070c3b76cSNeilBrown buf[size-1] = 0; 80170c3b76cSNeilBrown 80270c3b76cSNeilBrown vers = mesg; 80370c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 80470c3b76cSNeilBrown if (len <= 0) return -EINVAL; 80570c3b76cSNeilBrown do { 80670c3b76cSNeilBrown sign = *vers; 80770c3b76cSNeilBrown if (sign == '+' || sign == '-') 8088daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 80970c3b76cSNeilBrown else 8108daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 8118daf220aSBenny Halevy if (*minorp == '.') { 8128daf220aSBenny Halevy if (num < 4) 8138daf220aSBenny Halevy return -EINVAL; 8148daf220aSBenny Halevy minor = simple_strtoul(minorp+1, NULL, 0); 8158daf220aSBenny Halevy if (minor == 0) 8168daf220aSBenny Halevy return -EINVAL; 8178daf220aSBenny Halevy if (nfsd_minorversion(minor, sign == '-' ? 8188daf220aSBenny Halevy NFSD_CLEAR : NFSD_SET) < 0) 8198daf220aSBenny Halevy return -EINVAL; 8208daf220aSBenny Halevy goto next; 8218daf220aSBenny Halevy } 82270c3b76cSNeilBrown switch(num) { 82370c3b76cSNeilBrown case 2: 82470c3b76cSNeilBrown case 3: 82570c3b76cSNeilBrown case 4: 8266658d3a7SNeilBrown nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 82770c3b76cSNeilBrown break; 82870c3b76cSNeilBrown default: 82970c3b76cSNeilBrown return -EINVAL; 83070c3b76cSNeilBrown } 8318daf220aSBenny Halevy next: 83270c3b76cSNeilBrown vers += len + 1; 83370c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 83470c3b76cSNeilBrown /* If all get turned off, turn them back on, as 83570c3b76cSNeilBrown * having no versions is BAD 83670c3b76cSNeilBrown */ 8376658d3a7SNeilBrown nfsd_reset_versions(); 83870c3b76cSNeilBrown } 839261758b5SChuck Lever 84070c3b76cSNeilBrown /* Now write current state into reply buffer */ 84170c3b76cSNeilBrown len = 0; 84270c3b76cSNeilBrown sep = ""; 843261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 84470c3b76cSNeilBrown for (num=2 ; num <= 4 ; num++) 8456658d3a7SNeilBrown if (nfsd_vers(num, NFSD_AVAIL)) { 846261758b5SChuck Lever len = snprintf(buf, remaining, "%s%c%d", sep, 8476658d3a7SNeilBrown nfsd_vers(num, NFSD_TEST)?'+':'-', 84870c3b76cSNeilBrown num); 84970c3b76cSNeilBrown sep = " "; 850261758b5SChuck Lever 851261758b5SChuck Lever if (len > remaining) 852261758b5SChuck Lever break; 853261758b5SChuck Lever remaining -= len; 854261758b5SChuck Lever buf += len; 855261758b5SChuck Lever tlen += len; 85670c3b76cSNeilBrown } 8578daf220aSBenny Halevy if (nfsd_vers(4, NFSD_AVAIL)) 858261758b5SChuck Lever for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 859261758b5SChuck Lever minor++) { 860261758b5SChuck Lever len = snprintf(buf, remaining, " %c4.%u", 8618daf220aSBenny Halevy (nfsd_vers(4, NFSD_TEST) && 8628daf220aSBenny Halevy nfsd_minorversion(minor, NFSD_TEST)) ? 8638daf220aSBenny Halevy '+' : '-', 8648daf220aSBenny Halevy minor); 865261758b5SChuck Lever 866261758b5SChuck Lever if (len > remaining) 867261758b5SChuck Lever break; 868261758b5SChuck Lever remaining -= len; 869261758b5SChuck Lever buf += len; 870261758b5SChuck Lever tlen += len; 871261758b5SChuck Lever } 872261758b5SChuck Lever 873261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 874261758b5SChuck Lever if (len > remaining) 875261758b5SChuck Lever return -EINVAL; 876261758b5SChuck Lever return tlen + len; 87770c3b76cSNeilBrown } 87870c3b76cSNeilBrown 879262a0982SChuck Lever /** 880262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 881262a0982SChuck Lever * 882262a0982SChuck Lever * Input: 883262a0982SChuck Lever * buf: ignored 884262a0982SChuck Lever * size: zero 885262a0982SChuck Lever * Output: 886262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 887262a0982SChuck Lever * string containing positive or negative integer 888262a0982SChuck Lever * values representing the current status of each 889262a0982SChuck Lever * protocol version; 890262a0982SChuck Lever * return code is the size in bytes of the string 891262a0982SChuck Lever * On error: return code is zero or a negative errno value 892262a0982SChuck Lever * 893262a0982SChuck Lever * OR 894262a0982SChuck Lever * 895262a0982SChuck Lever * Input: 896262a0982SChuck Lever * buf: C string containing whitespace- 897262a0982SChuck Lever * separated positive or negative 898262a0982SChuck Lever * integer values representing NFS 899262a0982SChuck Lever * protocol versions to enable ("+n") 900262a0982SChuck Lever * or disable ("-n") 901262a0982SChuck Lever * size: non-zero length of C string in @buf 902262a0982SChuck Lever * Output: 903262a0982SChuck Lever * On success: status of zero or more protocol versions has 904262a0982SChuck Lever * been updated; passed-in buffer filled with 905262a0982SChuck Lever * '\n'-terminated C string containing positive 906262a0982SChuck Lever * or negative integer values representing the 907262a0982SChuck Lever * current status of each protocol version; 908262a0982SChuck Lever * return code is the size in bytes of the string 909262a0982SChuck Lever * On error: return code is zero or a negative errno value 910262a0982SChuck Lever */ 9113dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 9123dd98a3bSJeff Layton { 9133dd98a3bSJeff Layton ssize_t rv; 9143dd98a3bSJeff Layton 9153dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 9163dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 9173dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 9183dd98a3bSJeff Layton return rv; 9193dd98a3bSJeff Layton } 9203dd98a3bSJeff Layton 9214cd5dc75SChuck Lever /* 9220a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 9230a5372d8SChuck Lever * transports. 9240a5372d8SChuck Lever */ 9250a5372d8SChuck Lever static ssize_t __write_ports_names(char *buf) 9260a5372d8SChuck Lever { 9270a5372d8SChuck Lever if (nfsd_serv == NULL) 9280a5372d8SChuck Lever return 0; 929335c54bdSChuck Lever return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 9300a5372d8SChuck Lever } 9310a5372d8SChuck Lever 9320a5372d8SChuck Lever /* 9330b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 9340b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 9350b7c2f6fSChuck Lever * nfsd listener. 9360b7c2f6fSChuck Lever */ 9370b7c2f6fSChuck Lever static ssize_t __write_ports_addfd(char *buf) 9380b7c2f6fSChuck Lever { 9390b7c2f6fSChuck Lever char *mesg = buf; 9400b7c2f6fSChuck Lever int fd, err; 9410b7c2f6fSChuck Lever 9420b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 9430b7c2f6fSChuck Lever if (err != 0 || fd < 0) 9440b7c2f6fSChuck Lever return -EINVAL; 9450b7c2f6fSChuck Lever 9460b7c2f6fSChuck Lever err = nfsd_create_serv(); 9470b7c2f6fSChuck Lever if (err != 0) 9480b7c2f6fSChuck Lever return err; 9490b7c2f6fSChuck Lever 9500b7c2f6fSChuck Lever err = lockd_up(); 951ea068badSChuck Lever if (err != 0) 952ea068badSChuck Lever goto out; 9530b7c2f6fSChuck Lever 954bfba9ab4SChuck Lever err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 955ea068badSChuck Lever if (err < 0) 956ea068badSChuck Lever lockd_down(); 957ea068badSChuck Lever 958ea068badSChuck Lever out: 9590b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 9600b7c2f6fSChuck Lever nfsd_serv->sv_nrthreads--; 961ea068badSChuck Lever return err; 9620b7c2f6fSChuck Lever } 9630b7c2f6fSChuck Lever 9640b7c2f6fSChuck Lever /* 96582d56591SChuck Lever * A '-' followed by the 'name' of a socket means we close the socket. 96682d56591SChuck Lever */ 96782d56591SChuck Lever static ssize_t __write_ports_delfd(char *buf) 96882d56591SChuck Lever { 96982d56591SChuck Lever char *toclose; 97082d56591SChuck Lever int len = 0; 97182d56591SChuck Lever 97282d56591SChuck Lever toclose = kstrdup(buf + 1, GFP_KERNEL); 97382d56591SChuck Lever if (toclose == NULL) 97482d56591SChuck Lever return -ENOMEM; 97582d56591SChuck Lever 97682d56591SChuck Lever if (nfsd_serv != NULL) 9778435d34dSChuck Lever len = svc_sock_names(nfsd_serv, buf, 9788435d34dSChuck Lever SIMPLE_TRANSACTION_LIMIT, toclose); 97982d56591SChuck Lever if (len >= 0) 98082d56591SChuck Lever lockd_down(); 98182d56591SChuck Lever 98282d56591SChuck Lever kfree(toclose); 98382d56591SChuck Lever return len; 98482d56591SChuck Lever } 98582d56591SChuck Lever 98682d56591SChuck Lever /* 9874eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 9884eb68c26SChuck Lever * a port number. 9894eb68c26SChuck Lever */ 9904eb68c26SChuck Lever static ssize_t __write_ports_addxprt(char *buf) 9914eb68c26SChuck Lever { 9924eb68c26SChuck Lever char transport[16]; 9934eb68c26SChuck Lever int port, err; 9944eb68c26SChuck Lever 9954eb68c26SChuck Lever if (sscanf(buf, "%15s %4u", transport, &port) != 2) 9964eb68c26SChuck Lever return -EINVAL; 9974eb68c26SChuck Lever 9984eb68c26SChuck Lever if (port < 1 || port > USHORT_MAX) 9994eb68c26SChuck Lever return -EINVAL; 10004eb68c26SChuck Lever 10014eb68c26SChuck Lever err = nfsd_create_serv(); 10024eb68c26SChuck Lever if (err != 0) 10034eb68c26SChuck Lever return err; 10044eb68c26SChuck Lever 10054eb68c26SChuck Lever err = svc_create_xprt(nfsd_serv, transport, 10064eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 10074eb68c26SChuck Lever if (err < 0) { 10084eb68c26SChuck Lever /* Give a reasonable perror msg for bad transport string */ 10094eb68c26SChuck Lever if (err == -ENOENT) 10104eb68c26SChuck Lever err = -EPROTONOSUPPORT; 10114eb68c26SChuck Lever return err; 10124eb68c26SChuck Lever } 10134eb68c26SChuck Lever return 0; 10144eb68c26SChuck Lever } 10154eb68c26SChuck Lever 10164eb68c26SChuck Lever /* 10174cd5dc75SChuck Lever * A transport listener is removed by writing a "-", it's transport 10184cd5dc75SChuck Lever * name, and it's port number. 10194cd5dc75SChuck Lever */ 10204cd5dc75SChuck Lever static ssize_t __write_ports_delxprt(char *buf) 10214cd5dc75SChuck Lever { 10224cd5dc75SChuck Lever struct svc_xprt *xprt; 10234cd5dc75SChuck Lever char transport[16]; 10244cd5dc75SChuck Lever int port; 10254cd5dc75SChuck Lever 10264cd5dc75SChuck Lever if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) 10274cd5dc75SChuck Lever return -EINVAL; 10284cd5dc75SChuck Lever 10294cd5dc75SChuck Lever if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) 10304cd5dc75SChuck Lever return -EINVAL; 10314cd5dc75SChuck Lever 10324cd5dc75SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); 10334cd5dc75SChuck Lever if (xprt == NULL) 10344cd5dc75SChuck Lever return -ENOTCONN; 10354cd5dc75SChuck Lever 10364cd5dc75SChuck Lever svc_close_xprt(xprt); 10374cd5dc75SChuck Lever svc_xprt_put(xprt); 10384cd5dc75SChuck Lever return 0; 10394cd5dc75SChuck Lever } 10404cd5dc75SChuck Lever 1041bedbdd8bSNeil Brown static ssize_t __write_ports(struct file *file, char *buf, size_t size) 104280212d59SNeilBrown { 10430a5372d8SChuck Lever if (size == 0) 10440a5372d8SChuck Lever return __write_ports_names(buf); 10450b7c2f6fSChuck Lever 10460b7c2f6fSChuck Lever if (isdigit(buf[0])) 10470b7c2f6fSChuck Lever return __write_ports_addfd(buf); 104882d56591SChuck Lever 104982d56591SChuck Lever if (buf[0] == '-' && isdigit(buf[1])) 105082d56591SChuck Lever return __write_ports_delfd(buf); 10514eb68c26SChuck Lever 10524eb68c26SChuck Lever if (isalpha(buf[0])) 10534eb68c26SChuck Lever return __write_ports_addxprt(buf); 10544cd5dc75SChuck Lever 10554cd5dc75SChuck Lever if (buf[0] == '-' && isalpha(buf[1])) 10564cd5dc75SChuck Lever return __write_ports_delxprt(buf); 10574cd5dc75SChuck Lever 1058b41b66d6SNeilBrown return -EINVAL; 1059b41b66d6SNeilBrown } 106080212d59SNeilBrown 1061262a0982SChuck Lever /** 1062262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 1063262a0982SChuck Lever * 1064262a0982SChuck Lever * Input: 1065262a0982SChuck Lever * buf: ignored 1066262a0982SChuck Lever * size: zero 1067262a0982SChuck Lever * Output: 1068262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 1069262a0982SChuck Lever * string containing a whitespace-separated list of 1070262a0982SChuck Lever * named NFSD listeners; 1071262a0982SChuck Lever * return code is the size in bytes of the string 1072262a0982SChuck Lever * On error: return code is zero or a negative errno value 1073262a0982SChuck Lever * 1074262a0982SChuck Lever * OR 1075262a0982SChuck Lever * 1076262a0982SChuck Lever * Input: 1077262a0982SChuck Lever * buf: C string containing an unsigned 1078262a0982SChuck Lever * integer value representing a bound 1079262a0982SChuck Lever * but unconnected socket that is to be 1080c71206a7SChuck Lever * used as an NFSD listener; listen(3) 1081c71206a7SChuck Lever * must be called for a SOCK_STREAM 1082c71206a7SChuck Lever * socket, otherwise it is ignored 1083262a0982SChuck Lever * size: non-zero length of C string in @buf 1084262a0982SChuck Lever * Output: 1085262a0982SChuck Lever * On success: NFS service is started; 1086262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1087262a0982SChuck Lever * string containing a unique alphanumeric name of 1088262a0982SChuck Lever * the listener; 1089262a0982SChuck Lever * return code is the size in bytes of the string 1090262a0982SChuck Lever * On error: return code is a negative errno value 1091262a0982SChuck Lever * 1092262a0982SChuck Lever * OR 1093262a0982SChuck Lever * 1094262a0982SChuck Lever * Input: 1095262a0982SChuck Lever * buf: C string containing a "-" followed 1096262a0982SChuck Lever * by an integer value representing a 1097262a0982SChuck Lever * previously passed in socket file 1098262a0982SChuck Lever * descriptor 1099262a0982SChuck Lever * size: non-zero length of C string in @buf 1100262a0982SChuck Lever * Output: 1101262a0982SChuck Lever * On success: NFS service no longer listens on that socket; 1102262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1103262a0982SChuck Lever * string containing a unique name of the listener; 1104262a0982SChuck Lever * return code is the size in bytes of the string 1105262a0982SChuck Lever * On error: return code is a negative errno value 1106262a0982SChuck Lever * 1107262a0982SChuck Lever * OR 1108262a0982SChuck Lever * 1109262a0982SChuck Lever * Input: 1110262a0982SChuck Lever * buf: C string containing a transport 1111262a0982SChuck Lever * name and an unsigned integer value 1112262a0982SChuck Lever * representing the port to listen on, 1113262a0982SChuck Lever * separated by whitespace 1114262a0982SChuck Lever * size: non-zero length of C string in @buf 1115262a0982SChuck Lever * Output: 1116262a0982SChuck Lever * On success: returns zero; NFS service is started 1117262a0982SChuck Lever * On error: return code is a negative errno value 1118262a0982SChuck Lever * 1119262a0982SChuck Lever * OR 1120262a0982SChuck Lever * 1121262a0982SChuck Lever * Input: 1122262a0982SChuck Lever * buf: C string containing a "-" followed 1123262a0982SChuck Lever * by a transport name and an unsigned 1124262a0982SChuck Lever * integer value representing the port 1125262a0982SChuck Lever * to listen on, separated by whitespace 1126262a0982SChuck Lever * size: non-zero length of C string in @buf 1127262a0982SChuck Lever * Output: 1128262a0982SChuck Lever * On success: returns zero; NFS service no longer listens 1129262a0982SChuck Lever * on that transport 1130262a0982SChuck Lever * On error: return code is a negative errno value 1131262a0982SChuck Lever */ 1132bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 1133bedbdd8bSNeil Brown { 1134bedbdd8bSNeil Brown ssize_t rv; 11353dd98a3bSJeff Layton 1136bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1137bedbdd8bSNeil Brown rv = __write_ports(file, buf, size); 1138bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1139bedbdd8bSNeil Brown return rv; 1140bedbdd8bSNeil Brown } 1141bedbdd8bSNeil Brown 1142bedbdd8bSNeil Brown 1143596bbe53SNeilBrown int nfsd_max_blksize; 1144596bbe53SNeilBrown 1145262a0982SChuck Lever /** 1146262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 1147262a0982SChuck Lever * 1148262a0982SChuck Lever * Input: 1149262a0982SChuck Lever * buf: ignored 1150262a0982SChuck Lever * size: zero 1151262a0982SChuck Lever * 1152262a0982SChuck Lever * OR 1153262a0982SChuck Lever * 1154262a0982SChuck Lever * Input: 1155262a0982SChuck Lever * buf: C string containing an unsigned 1156262a0982SChuck Lever * integer value representing the new 1157262a0982SChuck Lever * NFS blksize 1158262a0982SChuck Lever * size: non-zero length of C string in @buf 1159262a0982SChuck Lever * Output: 1160262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1161262a0982SChuck Lever * containing numeric value of the current NFS blksize 1162262a0982SChuck Lever * setting; 1163262a0982SChuck Lever * return code is the size in bytes of the string 1164262a0982SChuck Lever * On error: return code is zero or a negative errno value 1165262a0982SChuck Lever */ 1166596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 1167596bbe53SNeilBrown { 1168596bbe53SNeilBrown char *mesg = buf; 1169596bbe53SNeilBrown if (size > 0) { 1170596bbe53SNeilBrown int bsize; 1171596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 1172596bbe53SNeilBrown if (rv) 1173596bbe53SNeilBrown return rv; 1174596bbe53SNeilBrown /* force bsize into allowed range and 1175596bbe53SNeilBrown * required alignment. 1176596bbe53SNeilBrown */ 1177596bbe53SNeilBrown if (bsize < 1024) 1178596bbe53SNeilBrown bsize = 1024; 1179596bbe53SNeilBrown if (bsize > NFSSVC_MAXBLKSIZE) 1180596bbe53SNeilBrown bsize = NFSSVC_MAXBLKSIZE; 1181596bbe53SNeilBrown bsize &= ~(1024-1); 1182bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1183596bbe53SNeilBrown if (nfsd_serv && nfsd_serv->sv_nrthreads) { 1184bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1185596bbe53SNeilBrown return -EBUSY; 1186596bbe53SNeilBrown } 1187596bbe53SNeilBrown nfsd_max_blksize = bsize; 1188bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1189596bbe53SNeilBrown } 1190e06b6405SChuck Lever 1191e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 1192e06b6405SChuck Lever nfsd_max_blksize); 1193596bbe53SNeilBrown } 1194596bbe53SNeilBrown 119570c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 11961da177e4SLinus Torvalds extern time_t nfs4_leasetime(void); 11971da177e4SLinus Torvalds 11983dd98a3bSJeff Layton static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) 11991da177e4SLinus Torvalds { 12001da177e4SLinus Torvalds /* if size > 10 seconds, call 12011da177e4SLinus Torvalds * nfs4_reset_lease() then write out the new lease (seconds) as reply 12021da177e4SLinus Torvalds */ 12031da177e4SLinus Torvalds char *mesg = buf; 12043dd98a3bSJeff Layton int rv, lease; 12051da177e4SLinus Torvalds 12061da177e4SLinus Torvalds if (size > 0) { 12073dd98a3bSJeff Layton if (nfsd_serv) 12083dd98a3bSJeff Layton return -EBUSY; 12091da177e4SLinus Torvalds rv = get_int(&mesg, &lease); 12101da177e4SLinus Torvalds if (rv) 12111da177e4SLinus Torvalds return rv; 12121da177e4SLinus Torvalds if (lease < 10 || lease > 3600) 12131da177e4SLinus Torvalds return -EINVAL; 12141da177e4SLinus Torvalds nfs4_reset_lease(lease); 12151da177e4SLinus Torvalds } 1216e06b6405SChuck Lever 1217e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", 1218e06b6405SChuck Lever nfs4_lease_time()); 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds 1221262a0982SChuck Lever /** 1222262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 1223262a0982SChuck Lever * 1224262a0982SChuck Lever * Input: 1225262a0982SChuck Lever * buf: ignored 1226262a0982SChuck Lever * size: zero 1227262a0982SChuck Lever * 1228262a0982SChuck Lever * OR 1229262a0982SChuck Lever * 1230262a0982SChuck Lever * Input: 1231262a0982SChuck Lever * buf: C string containing an unsigned 1232262a0982SChuck Lever * integer value representing the new 1233262a0982SChuck Lever * NFSv4 lease expiry time 1234262a0982SChuck Lever * size: non-zero length of C string in @buf 1235262a0982SChuck Lever * Output: 1236262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1237262a0982SChuck Lever * string containing unsigned integer value of the 1238262a0982SChuck Lever * current lease expiry time; 1239262a0982SChuck Lever * return code is the size in bytes of the string 1240262a0982SChuck Lever * On error: return code is zero or a negative errno value 1241262a0982SChuck Lever */ 12423dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 12433dd98a3bSJeff Layton { 12443dd98a3bSJeff Layton ssize_t rv; 12453dd98a3bSJeff Layton 12463dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 12473dd98a3bSJeff Layton rv = __write_leasetime(file, buf, size); 12483dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 12493dd98a3bSJeff Layton return rv; 12503dd98a3bSJeff Layton } 12513dd98a3bSJeff Layton 12523dd98a3bSJeff Layton extern char *nfs4_recoverydir(void); 12533dd98a3bSJeff Layton 12543dd98a3bSJeff Layton static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) 12550964a3d3SNeilBrown { 12560964a3d3SNeilBrown char *mesg = buf; 12570964a3d3SNeilBrown char *recdir; 12580964a3d3SNeilBrown int len, status; 12590964a3d3SNeilBrown 12603dd98a3bSJeff Layton if (size > 0) { 12613dd98a3bSJeff Layton if (nfsd_serv) 12623dd98a3bSJeff Layton return -EBUSY; 12633dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 12640964a3d3SNeilBrown return -EINVAL; 12650964a3d3SNeilBrown buf[size-1] = 0; 12660964a3d3SNeilBrown 12670964a3d3SNeilBrown recdir = mesg; 12680964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 12690964a3d3SNeilBrown if (len <= 0) 12700964a3d3SNeilBrown return -EINVAL; 12710964a3d3SNeilBrown 12720964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 12733dd98a3bSJeff Layton } 12743d72ab8fSChuck Lever 12753d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 12763d72ab8fSChuck Lever nfs4_recoverydir()); 12770964a3d3SNeilBrown } 12783dd98a3bSJeff Layton 1279262a0982SChuck Lever /** 1280262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1281262a0982SChuck Lever * 1282262a0982SChuck Lever * Input: 1283262a0982SChuck Lever * buf: ignored 1284262a0982SChuck Lever * size: zero 1285262a0982SChuck Lever * 1286262a0982SChuck Lever * OR 1287262a0982SChuck Lever * 1288262a0982SChuck Lever * Input: 1289262a0982SChuck Lever * buf: C string containing the pathname 1290262a0982SChuck Lever * of the directory on a local file 1291262a0982SChuck Lever * system containing permanent NFSv4 1292262a0982SChuck Lever * recovery data 1293262a0982SChuck Lever * size: non-zero length of C string in @buf 1294262a0982SChuck Lever * Output: 1295262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1296262a0982SChuck Lever * containing the current recovery pathname setting; 1297262a0982SChuck Lever * return code is the size in bytes of the string 1298262a0982SChuck Lever * On error: return code is zero or a negative errno value 1299262a0982SChuck Lever */ 13003dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 13013dd98a3bSJeff Layton { 13023dd98a3bSJeff Layton ssize_t rv; 13033dd98a3bSJeff Layton 13043dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 13053dd98a3bSJeff Layton rv = __write_recoverydir(file, buf, size); 13063dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 13073dd98a3bSJeff Layton return rv; 13083dd98a3bSJeff Layton } 13093dd98a3bSJeff Layton 131070c3b76cSNeilBrown #endif 13110964a3d3SNeilBrown 13121da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 13131da177e4SLinus Torvalds /* 13141da177e4SLinus Torvalds * populating the filesystem. 13151da177e4SLinus Torvalds */ 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 13181da177e4SLinus Torvalds { 13191da177e4SLinus Torvalds static struct tree_descr nfsd_files[] = { 13201da177e4SLinus Torvalds [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 13211da177e4SLinus Torvalds [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 13221da177e4SLinus Torvalds [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 13231da177e4SLinus Torvalds [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 13241da177e4SLinus Torvalds [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 13251da177e4SLinus Torvalds [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 13261da177e4SLinus Torvalds [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 13271da177e4SLinus Torvalds [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 1328e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1329e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 13304373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13314373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 133217efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 133317efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13341da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13351da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1336eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 133703cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 133870c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 133980212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1340596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13411da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13421da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 13430964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 13441da177e4SLinus Torvalds #endif 13451da177e4SLinus Torvalds /* last one */ {""} 13461da177e4SLinus Torvalds }; 13471da177e4SLinus Torvalds return simple_fill_super(sb, 0x6e667364, nfsd_files); 13481da177e4SLinus Torvalds } 13491da177e4SLinus Torvalds 1350454e2398SDavid Howells static int nfsd_get_sb(struct file_system_type *fs_type, 1351454e2398SDavid Howells int flags, const char *dev_name, void *data, struct vfsmount *mnt) 13521da177e4SLinus Torvalds { 1353454e2398SDavid Howells return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); 13541da177e4SLinus Torvalds } 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 13571da177e4SLinus Torvalds .owner = THIS_MODULE, 13581da177e4SLinus Torvalds .name = "nfsd", 13591da177e4SLinus Torvalds .get_sb = nfsd_get_sb, 13601da177e4SLinus Torvalds .kill_sb = kill_litter_super, 13611da177e4SLinus Torvalds }; 13621da177e4SLinus Torvalds 1363e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1364e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1365e331f606SJ. Bruce Fields { 1366e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1367e331f606SJ. Bruce Fields 1368e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1369e331f606SJ. Bruce Fields if (!entry) 1370e331f606SJ. Bruce Fields return -ENOMEM; 13719ef2db26SDenis V. Lunev entry = proc_create("exports", 0, entry, &exports_operations); 1372e331f606SJ. Bruce Fields if (!entry) 1373e331f606SJ. Bruce Fields return -ENOMEM; 1374e331f606SJ. Bruce Fields return 0; 1375e331f606SJ. Bruce Fields } 1376e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1377e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1378e331f606SJ. Bruce Fields { 1379e331f606SJ. Bruce Fields return 0; 1380e331f606SJ. Bruce Fields } 1381e331f606SJ. Bruce Fields #endif 1382e331f606SJ. Bruce Fields 13831da177e4SLinus Torvalds static int __init init_nfsd(void) 13841da177e4SLinus Torvalds { 13851da177e4SLinus Torvalds int retval; 13861da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 13871da177e4SLinus Torvalds 1388e8ff2a84SJ. Bruce Fields retval = nfs4_state_init(); /* nfs4 locking state */ 1389e8ff2a84SJ. Bruce Fields if (retval) 1390e8ff2a84SJ. Bruce Fields return retval; 13911da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1392d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1393d5c3428bSJ. Bruce Fields if (retval) 1394d5c3428bSJ. Bruce Fields goto out_free_stat; 1395dbf847ecSJ. Bruce Fields retval = nfsd_export_init(); 1396dbf847ecSJ. Bruce Fields if (retval) 1397dbf847ecSJ. Bruce Fields goto out_free_cache; 13981da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1399dbf847ecSJ. Bruce Fields retval = nfsd_idmap_init(); 1400dbf847ecSJ. Bruce Fields if (retval) 1401dbf847ecSJ. Bruce Fields goto out_free_lockd; 1402e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1403e331f606SJ. Bruce Fields if (retval) 1404e331f606SJ. Bruce Fields goto out_free_idmap; 14051da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 140626808d3fSJ. Bruce Fields if (retval) 140726808d3fSJ. Bruce Fields goto out_free_all; 140826808d3fSJ. Bruce Fields return 0; 140926808d3fSJ. Bruce Fields out_free_all: 14101da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14111da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1412e331f606SJ. Bruce Fields out_free_idmap: 1413dbf847ecSJ. Bruce Fields nfsd_idmap_shutdown(); 1414dbf847ecSJ. Bruce Fields out_free_lockd: 14151da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1416e331f606SJ. Bruce Fields nfsd_export_shutdown(); 1417dbf847ecSJ. Bruce Fields out_free_cache: 1418e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1419d5c3428bSJ. Bruce Fields out_free_stat: 1420d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 142146b25895SJ. Bruce Fields nfsd4_free_slabs(); 14221da177e4SLinus Torvalds return retval; 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds static void __exit exit_nfsd(void) 14261da177e4SLinus Torvalds { 14271da177e4SLinus Torvalds nfsd_export_shutdown(); 1428d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 14291da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14301da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 14311da177e4SLinus Torvalds nfsd_stat_shutdown(); 14321da177e4SLinus Torvalds nfsd_lockd_shutdown(); 14331da177e4SLinus Torvalds nfsd_idmap_shutdown(); 1434e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 14351da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds 14381da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 14391da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 14401da177e4SLinus Torvalds module_init(init_nfsd) 14411da177e4SLinus Torvalds module_exit(exit_nfsd) 1442