11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Syscall interface to knfsd. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 75a0e3ad6STejun Heo #include <linux/slab.h> 83f8206d4SAl Viro #include <linux/namei.h> 9b41b66d6SNeilBrown #include <linux/ctype.h> 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds #include <linux/nfsd_idmap.h> 1280212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 131da177e4SLinus Torvalds #include <linux/nfsd/syscall.h> 144373ea84SWendy Cheng #include <linux/lockd/lockd.h> 154116092bSChuck Lever #include <linux/sunrpc/clnt.h> 161da177e4SLinus Torvalds 179a74af21SBoaz Harrosh #include "nfsd.h" 189a74af21SBoaz Harrosh #include "cache.h" 199a74af21SBoaz Harrosh 201da177e4SLinus Torvalds /* 211da177e4SLinus Torvalds * We have a single directory with 9 nodes in it. 221da177e4SLinus Torvalds */ 231da177e4SLinus Torvalds enum { 241da177e4SLinus Torvalds NFSD_Root = 1, 251da177e4SLinus Torvalds NFSD_Svc, 261da177e4SLinus Torvalds NFSD_Add, 271da177e4SLinus Torvalds NFSD_Del, 281da177e4SLinus Torvalds NFSD_Export, 291da177e4SLinus Torvalds NFSD_Unexport, 301da177e4SLinus Torvalds NFSD_Getfd, 311da177e4SLinus Torvalds NFSD_Getfs, 321da177e4SLinus Torvalds NFSD_List, 33e8e8753fSJ. Bruce Fields NFSD_Export_features, 341da177e4SLinus Torvalds NFSD_Fh, 354373ea84SWendy Cheng NFSD_FO_UnlockIP, 3617efa372SWendy Cheng NFSD_FO_UnlockFS, 371da177e4SLinus Torvalds NFSD_Threads, 38eed2965aSGreg Banks NFSD_Pool_Threads, 3903cf6c9fSGreg Banks NFSD_Pool_Stats, 4070c3b76cSNeilBrown NFSD_Versions, 4180212d59SNeilBrown NFSD_Ports, 42596bbe53SNeilBrown NFSD_MaxBlkSize, 4370c3b76cSNeilBrown /* 4470c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4570c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 4670c3b76cSNeilBrown */ 4770c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 481da177e4SLinus Torvalds NFSD_Leasetime, 49efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 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); 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); 7670c3b76cSNeilBrown #endif 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 791da177e4SLinus Torvalds [NFSD_Svc] = write_svc, 801da177e4SLinus Torvalds [NFSD_Add] = write_add, 811da177e4SLinus Torvalds [NFSD_Del] = write_del, 821da177e4SLinus Torvalds [NFSD_Export] = write_export, 831da177e4SLinus Torvalds [NFSD_Unexport] = write_unexport, 841da177e4SLinus Torvalds [NFSD_Getfd] = write_getfd, 851da177e4SLinus Torvalds [NFSD_Getfs] = write_getfs, 861da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 87b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 88b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 891da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 90eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 9170c3b76cSNeilBrown [NFSD_Versions] = write_versions, 9280212d59SNeilBrown [NFSD_Ports] = write_ports, 93596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 9470c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 951da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 96efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 970964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 9870c3b76cSNeilBrown #endif 991da177e4SLinus Torvalds }; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1021da177e4SLinus Torvalds { 1037eaa36e2SJosef "Jeff" Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 1041da177e4SLinus Torvalds char *data; 1051da177e4SLinus Torvalds ssize_t rv; 1061da177e4SLinus Torvalds 107e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1081da177e4SLinus Torvalds return -EINVAL; 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1111da177e4SLinus Torvalds if (IS_ERR(data)) 1121da177e4SLinus Torvalds return PTR_ERR(data); 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1158971a101SNeilBrown if (rv >= 0) { 1161da177e4SLinus Torvalds simple_transaction_set(file, rv); 1171da177e4SLinus Torvalds rv = size; 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds return rv; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1227390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1237390022dSNeilBrown { 1247390022dSNeilBrown if (! file->private_data) { 1257390022dSNeilBrown /* An attempt to read a transaction file without writing 1267390022dSNeilBrown * causes a 0-byte write so that the file can return 1277390022dSNeilBrown * state information 1287390022dSNeilBrown */ 1297390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1307390022dSNeilBrown if (rv < 0) 1317390022dSNeilBrown return rv; 1327390022dSNeilBrown } 1337390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1347390022dSNeilBrown } 1357390022dSNeilBrown 1364b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1371da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1387390022dSNeilBrown .read = nfsctl_transaction_read, 1391da177e4SLinus Torvalds .release = simple_transaction_release, 1406038f373SArnd Bergmann .llseek = default_llseek, 1411da177e4SLinus Torvalds }; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static int exports_open(struct inode *inode, struct file *file) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds return seq_open(file, &nfs_exports_op); 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1484b6f5d20SArjan van de Ven static const struct file_operations exports_operations = { 1491da177e4SLinus Torvalds .open = exports_open, 1501da177e4SLinus Torvalds .read = seq_read, 1511da177e4SLinus Torvalds .llseek = seq_lseek, 1521da177e4SLinus Torvalds .release = seq_release, 1539ef2db26SDenis V. Lunev .owner = THIS_MODULE, 1541da177e4SLinus Torvalds }; 1551da177e4SLinus Torvalds 156e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 157e8e8753fSJ. Bruce Fields { 158e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 159e8e8753fSJ. Bruce Fields return 0; 160e8e8753fSJ. Bruce Fields } 161e8e8753fSJ. Bruce Fields 162e8e8753fSJ. Bruce Fields static int export_features_open(struct inode *inode, struct file *file) 163e8e8753fSJ. Bruce Fields { 164e8e8753fSJ. Bruce Fields return single_open(file, export_features_show, NULL); 165e8e8753fSJ. Bruce Fields } 166e8e8753fSJ. Bruce Fields 167e8e8753fSJ. Bruce Fields static struct file_operations export_features_operations = { 168e8e8753fSJ. Bruce Fields .open = export_features_open, 169e8e8753fSJ. Bruce Fields .read = seq_read, 170e8e8753fSJ. Bruce Fields .llseek = seq_lseek, 171e8e8753fSJ. Bruce Fields .release = single_release, 172e8e8753fSJ. Bruce Fields }; 173e8e8753fSJ. Bruce Fields 17403cf6c9fSGreg Banks extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); 175ed2d8aedSRyusei Yamaguchi extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); 17603cf6c9fSGreg Banks 177828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 17803cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 17903cf6c9fSGreg Banks .read = seq_read, 18003cf6c9fSGreg Banks .llseek = seq_lseek, 181ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 18203cf6c9fSGreg Banks .owner = THIS_MODULE, 18303cf6c9fSGreg Banks }; 18403cf6c9fSGreg Banks 1851da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 1861da177e4SLinus Torvalds /* 1871da177e4SLinus Torvalds * payload - write methods 1881da177e4SLinus Torvalds */ 1891da177e4SLinus Torvalds 190262a0982SChuck Lever /** 191262a0982SChuck Lever * write_svc - Start kernel's NFSD server 192262a0982SChuck Lever * 193262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/threads is preferred. 194262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 195262a0982SChuck Lever * 196262a0982SChuck Lever * Input: 197262a0982SChuck Lever * buf: struct nfsctl_svc 198262a0982SChuck Lever * svc_port: port number of this 199262a0982SChuck Lever * server's listener 200262a0982SChuck Lever * svc_nthreads: number of threads to start 201262a0982SChuck Lever * size: size in bytes of passed in nfsctl_svc 202262a0982SChuck Lever * Output: 203262a0982SChuck Lever * On success: returns zero 204262a0982SChuck Lever * On error: return code is negative errno value 205262a0982SChuck Lever */ 2061da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds struct nfsctl_svc *data; 20982e12fe9SNeilBrown int err; 2101da177e4SLinus Torvalds if (size < sizeof(*data)) 2111da177e4SLinus Torvalds return -EINVAL; 2121da177e4SLinus Torvalds data = (struct nfsctl_svc*) buf; 21382e12fe9SNeilBrown err = nfsd_svc(data->svc_port, data->svc_nthreads); 21482e12fe9SNeilBrown if (err < 0) 21582e12fe9SNeilBrown return err; 21682e12fe9SNeilBrown return 0; 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds 219262a0982SChuck Lever /** 220262a0982SChuck Lever * write_add - Add or modify client entry in auth unix cache 221262a0982SChuck Lever * 222262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 223262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 224262a0982SChuck Lever * 225262a0982SChuck Lever * Input: 226262a0982SChuck Lever * buf: struct nfsctl_client 227262a0982SChuck Lever * cl_ident: '\0'-terminated C string 228262a0982SChuck Lever * containing domain name 229262a0982SChuck Lever * of client 230262a0982SChuck Lever * cl_naddr: no. of items in cl_addrlist 231262a0982SChuck Lever * cl_addrlist: array of client addresses 232262a0982SChuck Lever * cl_fhkeytype: ignored 233262a0982SChuck Lever * cl_fhkeylen: ignored 234262a0982SChuck Lever * cl_fhkey: ignored 235262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 236262a0982SChuck Lever * Output: 237262a0982SChuck Lever * On success: returns zero 238262a0982SChuck Lever * On error: return code is negative errno value 239262a0982SChuck Lever * 240262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 241262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 242262a0982SChuck Lever */ 2431da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds struct nfsctl_client *data; 2461da177e4SLinus Torvalds if (size < sizeof(*data)) 2471da177e4SLinus Torvalds return -EINVAL; 2481da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2491da177e4SLinus Torvalds return exp_addclient(data); 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 252262a0982SChuck Lever /** 253262a0982SChuck Lever * write_del - Remove client from auth unix cache 254262a0982SChuck Lever * 255262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 256262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 257262a0982SChuck Lever * 258262a0982SChuck Lever * Input: 259262a0982SChuck Lever * buf: struct nfsctl_client 260262a0982SChuck Lever * cl_ident: '\0'-terminated C string 261262a0982SChuck Lever * containing domain name 262262a0982SChuck Lever * of client 263262a0982SChuck Lever * cl_naddr: ignored 264262a0982SChuck Lever * cl_addrlist: ignored 265262a0982SChuck Lever * cl_fhkeytype: ignored 266262a0982SChuck Lever * cl_fhkeylen: ignored 267262a0982SChuck Lever * cl_fhkey: ignored 268262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 269262a0982SChuck Lever * Output: 270262a0982SChuck Lever * On success: returns zero 271262a0982SChuck Lever * On error: return code is negative errno value 272262a0982SChuck Lever * 273262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 274262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 275262a0982SChuck Lever */ 2761da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size) 2771da177e4SLinus Torvalds { 2781da177e4SLinus Torvalds struct nfsctl_client *data; 2791da177e4SLinus Torvalds if (size < sizeof(*data)) 2801da177e4SLinus Torvalds return -EINVAL; 2811da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2821da177e4SLinus Torvalds return exp_delclient(data); 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 285262a0982SChuck Lever /** 286262a0982SChuck Lever * write_export - Export part or all of a local file system 287262a0982SChuck Lever * 288262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 289262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 290262a0982SChuck Lever * 291262a0982SChuck Lever * Input: 292262a0982SChuck Lever * buf: struct nfsctl_export 293262a0982SChuck Lever * ex_client: '\0'-terminated C string 294262a0982SChuck Lever * containing domain name 295262a0982SChuck Lever * of client allowed to access 296262a0982SChuck Lever * this export 297262a0982SChuck Lever * ex_path: '\0'-terminated C string 298262a0982SChuck Lever * containing pathname of 299262a0982SChuck Lever * directory in local file system 300262a0982SChuck Lever * ex_dev: fsid to use for this export 301262a0982SChuck Lever * ex_ino: ignored 302262a0982SChuck Lever * ex_flags: export flags for this export 303262a0982SChuck Lever * ex_anon_uid: UID to use for anonymous 304262a0982SChuck Lever * requests 305262a0982SChuck Lever * ex_anon_gid: GID to use for anonymous 306262a0982SChuck Lever * requests 307262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 308262a0982SChuck Lever * Output: 309262a0982SChuck Lever * On success: returns zero 310262a0982SChuck Lever * On error: return code is negative errno value 311262a0982SChuck Lever */ 3121da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size) 3131da177e4SLinus Torvalds { 3141da177e4SLinus Torvalds struct nfsctl_export *data; 3151da177e4SLinus Torvalds if (size < sizeof(*data)) 3161da177e4SLinus Torvalds return -EINVAL; 3171da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3181da177e4SLinus Torvalds return exp_export(data); 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds 321262a0982SChuck Lever /** 322262a0982SChuck Lever * write_unexport - Unexport a previously exported file system 323262a0982SChuck Lever * 324262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 325262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 326262a0982SChuck Lever * 327262a0982SChuck Lever * Input: 328262a0982SChuck Lever * buf: struct nfsctl_export 329262a0982SChuck Lever * ex_client: '\0'-terminated C string 330262a0982SChuck Lever * containing domain name 331262a0982SChuck Lever * of client no longer allowed 332262a0982SChuck Lever * to access this export 333262a0982SChuck Lever * ex_path: '\0'-terminated C string 334262a0982SChuck Lever * containing pathname of 335262a0982SChuck Lever * directory in local file system 336262a0982SChuck Lever * ex_dev: ignored 337262a0982SChuck Lever * ex_ino: ignored 338262a0982SChuck Lever * ex_flags: ignored 339262a0982SChuck Lever * ex_anon_uid: ignored 340262a0982SChuck Lever * ex_anon_gid: ignored 341262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 342262a0982SChuck Lever * Output: 343262a0982SChuck Lever * On success: returns zero 344262a0982SChuck Lever * On error: return code is negative errno value 345262a0982SChuck Lever */ 3461da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds struct nfsctl_export *data; 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds if (size < sizeof(*data)) 3511da177e4SLinus Torvalds return -EINVAL; 3521da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3531da177e4SLinus Torvalds return exp_unexport(data); 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 356262a0982SChuck Lever /** 357262a0982SChuck Lever * write_getfs - Get a variable-length NFS file handle by path 358262a0982SChuck Lever * 359262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 360262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 361262a0982SChuck Lever * 362262a0982SChuck Lever * Input: 363262a0982SChuck Lever * buf: struct nfsctl_fsparm 364262a0982SChuck Lever * gd_addr: socket address of client 365262a0982SChuck Lever * gd_path: '\0'-terminated C string 366262a0982SChuck Lever * containing pathname of 367262a0982SChuck Lever * directory in local file system 368262a0982SChuck Lever * gd_maxlen: maximum size of returned file 369262a0982SChuck Lever * handle 370262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fsparm 371262a0982SChuck Lever * Output: 372262a0982SChuck Lever * On success: passed-in buffer filled with a knfsd_fh structure 373262a0982SChuck Lever * (a variable-length raw NFS file handle); 374262a0982SChuck Lever * return code is the size in bytes of the file handle 375262a0982SChuck Lever * On error: return code is negative errno value 376262a0982SChuck Lever * 377262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 378262a0982SChuck Lever * is the same size as a struct sockaddr_in. 379262a0982SChuck Lever */ 3801da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size) 3811da177e4SLinus Torvalds { 3821da177e4SLinus Torvalds struct nfsctl_fsparm *data; 3831da177e4SLinus Torvalds struct sockaddr_in *sin; 3841da177e4SLinus Torvalds struct auth_domain *clp; 3851da177e4SLinus Torvalds int err = 0; 3861da177e4SLinus Torvalds struct knfsd_fh *res; 387f15364bdSAurélien Charbon struct in6_addr in6; 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds if (size < sizeof(*data)) 3901da177e4SLinus Torvalds return -EINVAL; 3911da177e4SLinus Torvalds data = (struct nfsctl_fsparm*)buf; 3921da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 3931da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 3941da177e4SLinus Torvalds goto out; 3951da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 3961da177e4SLinus Torvalds if (data->gd_maxlen > NFS3_FHSIZE) 3971da177e4SLinus Torvalds data->gd_maxlen = NFS3_FHSIZE; 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds res = (struct knfsd_fh*)buf; 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds exp_readlock(); 402f15364bdSAurélien Charbon 403f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 404f15364bdSAurélien Charbon 405f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 406f15364bdSAurélien Charbon if (!clp) 4071da177e4SLinus Torvalds err = -EPERM; 4081da177e4SLinus Torvalds else { 4091da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); 4101da177e4SLinus Torvalds auth_domain_put(clp); 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds exp_readunlock(); 4131da177e4SLinus Torvalds if (err == 0) 41412127498SAndrew Morton err = res->fh_size + offsetof(struct knfsd_fh, fh_base); 4151da177e4SLinus Torvalds out: 4161da177e4SLinus Torvalds return err; 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 419262a0982SChuck Lever /** 420262a0982SChuck Lever * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) 421262a0982SChuck Lever * 422262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 423262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 424262a0982SChuck Lever * 425262a0982SChuck Lever * Input: 426262a0982SChuck Lever * buf: struct nfsctl_fdparm 427262a0982SChuck Lever * gd_addr: socket address of client 428262a0982SChuck Lever * gd_path: '\0'-terminated C string 429262a0982SChuck Lever * containing pathname of 430262a0982SChuck Lever * directory in local file system 431262a0982SChuck Lever * gd_version: fdparm structure version 432262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fdparm 433262a0982SChuck Lever * Output: 434262a0982SChuck Lever * On success: passed-in buffer filled with nfsctl_res 435262a0982SChuck Lever * (a fixed-length raw NFS file handle); 436262a0982SChuck Lever * return code is the size in bytes of the file handle 437262a0982SChuck Lever * On error: return code is negative errno value 438262a0982SChuck Lever * 439262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 440262a0982SChuck Lever * is the same size as a struct sockaddr_in. 441262a0982SChuck Lever */ 4421da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size) 4431da177e4SLinus Torvalds { 4441da177e4SLinus Torvalds struct nfsctl_fdparm *data; 4451da177e4SLinus Torvalds struct sockaddr_in *sin; 4461da177e4SLinus Torvalds struct auth_domain *clp; 4471da177e4SLinus Torvalds int err = 0; 4481da177e4SLinus Torvalds struct knfsd_fh fh; 4491da177e4SLinus Torvalds char *res; 450f15364bdSAurélien Charbon struct in6_addr in6; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds if (size < sizeof(*data)) 4531da177e4SLinus Torvalds return -EINVAL; 4541da177e4SLinus Torvalds data = (struct nfsctl_fdparm*)buf; 4551da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 4561da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 4571da177e4SLinus Torvalds goto out; 4581da177e4SLinus Torvalds err = -EINVAL; 4591da177e4SLinus Torvalds if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) 4601da177e4SLinus Torvalds goto out; 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds res = buf; 4631da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 4641da177e4SLinus Torvalds exp_readlock(); 465f15364bdSAurélien Charbon 466f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 467f15364bdSAurélien Charbon 468f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 469f15364bdSAurélien Charbon if (!clp) 4701da177e4SLinus Torvalds err = -EPERM; 4711da177e4SLinus Torvalds else { 4721da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); 4731da177e4SLinus Torvalds auth_domain_put(clp); 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds exp_readunlock(); 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds if (err == 0) { 4781da177e4SLinus Torvalds memset(res,0, NFS_FHSIZE); 4791da177e4SLinus Torvalds memcpy(res, &fh.fh_base, fh.fh_size); 4801da177e4SLinus Torvalds err = NFS_FHSIZE; 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds out: 4831da177e4SLinus Torvalds return err; 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 486262a0982SChuck Lever /** 487262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 488262a0982SChuck Lever * 489262a0982SChuck Lever * Experimental. 490262a0982SChuck Lever * 491262a0982SChuck Lever * Input: 492262a0982SChuck Lever * buf: '\n'-terminated C string containing a 4934116092bSChuck Lever * presentation format IP address 494262a0982SChuck Lever * size: length of C string in @buf 495262a0982SChuck Lever * Output: 496262a0982SChuck Lever * On success: returns zero if all specified locks were released; 497262a0982SChuck Lever * returns one if one or more locks were not released 498262a0982SChuck Lever * On error: return code is negative errno value 499262a0982SChuck Lever */ 500b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 5014373ea84SWendy Cheng { 5024116092bSChuck Lever struct sockaddr_storage address; 5034116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 5044116092bSChuck Lever size_t salen = sizeof(address); 505367c8c7bSChuck Lever char *fo_path; 5064373ea84SWendy Cheng 5074373ea84SWendy Cheng /* sanity check */ 5084373ea84SWendy Cheng if (size == 0) 5094373ea84SWendy Cheng return -EINVAL; 5104373ea84SWendy Cheng 5114373ea84SWendy Cheng if (buf[size-1] != '\n') 5124373ea84SWendy Cheng return -EINVAL; 5134373ea84SWendy Cheng 5144373ea84SWendy Cheng fo_path = buf; 5154373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 5164373ea84SWendy Cheng return -EINVAL; 5174373ea84SWendy Cheng 5184116092bSChuck Lever if (rpc_pton(fo_path, size, sap, salen) == 0) 5194373ea84SWendy Cheng return -EINVAL; 5204373ea84SWendy Cheng 5214116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 5224373ea84SWendy Cheng } 5234373ea84SWendy Cheng 524262a0982SChuck Lever /** 525262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 526262a0982SChuck Lever * 527262a0982SChuck Lever * Experimental. 528262a0982SChuck Lever * 529262a0982SChuck Lever * Input: 530262a0982SChuck Lever * buf: '\n'-terminated C string containing the 531262a0982SChuck Lever * absolute pathname of a local file system 532262a0982SChuck Lever * size: length of C string in @buf 533262a0982SChuck Lever * Output: 534262a0982SChuck Lever * On success: returns zero if all specified locks were released; 535262a0982SChuck Lever * returns one if one or more locks were not released 536262a0982SChuck Lever * On error: return code is negative errno value 537262a0982SChuck Lever */ 538b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 53917efa372SWendy Cheng { 540a63bb996SAl Viro struct path path; 54117efa372SWendy Cheng char *fo_path; 54217efa372SWendy Cheng int error; 54317efa372SWendy Cheng 54417efa372SWendy Cheng /* sanity check */ 54517efa372SWendy Cheng if (size == 0) 54617efa372SWendy Cheng return -EINVAL; 54717efa372SWendy Cheng 54817efa372SWendy Cheng if (buf[size-1] != '\n') 54917efa372SWendy Cheng return -EINVAL; 55017efa372SWendy Cheng 55117efa372SWendy Cheng fo_path = buf; 55217efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 55317efa372SWendy Cheng return -EINVAL; 55417efa372SWendy Cheng 555a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 55617efa372SWendy Cheng if (error) 55717efa372SWendy Cheng return error; 55817efa372SWendy Cheng 559262a0982SChuck Lever /* 560262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 561262a0982SChuck Lever * releasing locks on the wrong file system. 562262a0982SChuck Lever * 563262a0982SChuck Lever * For example: 564262a0982SChuck Lever * 1. Does the path refer to a directory? 565262a0982SChuck Lever * 2. Is that directory a mount point, or 566262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 567262a0982SChuck Lever */ 568a63bb996SAl Viro error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); 56917efa372SWendy Cheng 570a63bb996SAl Viro path_put(&path); 57117efa372SWendy Cheng return error; 57217efa372SWendy Cheng } 57317efa372SWendy Cheng 574262a0982SChuck Lever /** 575262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 576262a0982SChuck Lever * 577262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 578262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 579262a0982SChuck Lever * contain escape sequences. 580262a0982SChuck Lever * 581262a0982SChuck Lever * Input: 582262a0982SChuck Lever * buf: 583262a0982SChuck Lever * domain: client domain name 584262a0982SChuck Lever * path: export pathname 585262a0982SChuck Lever * maxsize: numeric maximum size of 586262a0982SChuck Lever * @buf 587262a0982SChuck Lever * size: length of C string in @buf 588262a0982SChuck Lever * Output: 589262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 590262a0982SChuck Lever * string containing a ASCII hex text version 591262a0982SChuck Lever * of the NFS file handle; 592262a0982SChuck Lever * return code is the size in bytes of the string 593262a0982SChuck Lever * On error: return code is negative errno value 594262a0982SChuck Lever */ 5951da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds char *dname, *path; 598246d95baSAndrew Morton int uninitialized_var(maxsize); 5991da177e4SLinus Torvalds char *mesg = buf; 6001da177e4SLinus Torvalds int len; 6011da177e4SLinus Torvalds struct auth_domain *dom; 6021da177e4SLinus Torvalds struct knfsd_fh fh; 6031da177e4SLinus Torvalds 60487d26ea7SJ. Bruce Fields if (size == 0) 60587d26ea7SJ. Bruce Fields return -EINVAL; 60687d26ea7SJ. Bruce Fields 6071da177e4SLinus Torvalds if (buf[size-1] != '\n') 6081da177e4SLinus Torvalds return -EINVAL; 6091da177e4SLinus Torvalds buf[size-1] = 0; 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds dname = mesg; 6121da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 61354224f04SChuck Lever if (len <= 0) 61454224f04SChuck Lever return -EINVAL; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds path = dname+len+1; 6171da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 61854224f04SChuck Lever if (len <= 0) 61954224f04SChuck Lever return -EINVAL; 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 6221da177e4SLinus Torvalds if (len) 6231da177e4SLinus Torvalds return len; 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 6261da177e4SLinus Torvalds return -EINVAL; 6271da177e4SLinus Torvalds if (maxsize > NFS3_FHSIZE) 6281da177e4SLinus Torvalds maxsize = NFS3_FHSIZE; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 6311da177e4SLinus Torvalds return -EINVAL; 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 6341da177e4SLinus Torvalds dom = unix_domain_find(dname); 6351da177e4SLinus Torvalds if (!dom) 6361da177e4SLinus Torvalds return -ENOMEM; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds len = exp_rootfh(dom, path, &fh, maxsize); 6391da177e4SLinus Torvalds auth_domain_put(dom); 6401da177e4SLinus Torvalds if (len) 6411da177e4SLinus Torvalds return len; 6421da177e4SLinus Torvalds 64354224f04SChuck Lever mesg = buf; 64454224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 6451da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 6461da177e4SLinus Torvalds mesg[-1] = '\n'; 6471da177e4SLinus Torvalds return mesg - buf; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds 650262a0982SChuck Lever /** 651262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 652262a0982SChuck Lever * 653262a0982SChuck Lever * Input: 654262a0982SChuck Lever * buf: ignored 655262a0982SChuck Lever * size: zero 656262a0982SChuck Lever * Output: 657262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 658262a0982SChuck Lever * string numeric value representing the number of 659262a0982SChuck Lever * running NFSD threads; 660262a0982SChuck Lever * return code is the size in bytes of the string 661262a0982SChuck Lever * On error: return code is zero 662262a0982SChuck Lever * 663262a0982SChuck Lever * OR 664262a0982SChuck Lever * 665262a0982SChuck Lever * Input: 666262a0982SChuck Lever * buf: C string containing an unsigned 667262a0982SChuck Lever * integer value representing the 668262a0982SChuck Lever * number of NFSD threads to start 669262a0982SChuck Lever * size: non-zero length of C string in @buf 670262a0982SChuck Lever * Output: 671262a0982SChuck Lever * On success: NFS service is started; 672262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 673262a0982SChuck Lever * string numeric value representing the number of 674262a0982SChuck Lever * running NFSD threads; 675262a0982SChuck Lever * return code is the size in bytes of the string 676262a0982SChuck Lever * On error: return code is zero or a negative errno value 677262a0982SChuck Lever */ 6781da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 6791da177e4SLinus Torvalds { 6801da177e4SLinus Torvalds char *mesg = buf; 6811da177e4SLinus Torvalds int rv; 6821da177e4SLinus Torvalds if (size > 0) { 6831da177e4SLinus Torvalds int newthreads; 6841da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 6851da177e4SLinus Torvalds if (rv) 6861da177e4SLinus Torvalds return rv; 6871da177e4SLinus Torvalds if (newthreads < 0) 6881da177e4SLinus Torvalds return -EINVAL; 6899e074856SChuck Lever rv = nfsd_svc(NFS_PORT, newthreads); 69082e12fe9SNeilBrown if (rv < 0) 6911da177e4SLinus Torvalds return rv; 69282e12fe9SNeilBrown } else 69382e12fe9SNeilBrown rv = nfsd_nrthreads(); 694e06b6405SChuck Lever 69582e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds 698262a0982SChuck Lever /** 699262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 700262a0982SChuck Lever * 701262a0982SChuck Lever * Input: 702262a0982SChuck Lever * buf: ignored 703262a0982SChuck Lever * size: zero 704262a0982SChuck Lever * 705262a0982SChuck Lever * OR 706262a0982SChuck Lever * 707262a0982SChuck Lever * Input: 708262a0982SChuck Lever * buf: C string containing whitespace- 709262a0982SChuck Lever * separated unsigned integer values 710262a0982SChuck Lever * representing the number of NFSD 711262a0982SChuck Lever * threads to start in each pool 712262a0982SChuck Lever * size: non-zero length of C string in @buf 713262a0982SChuck Lever * Output: 714262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 715262a0982SChuck Lever * string containing integer values representing the 716262a0982SChuck Lever * number of NFSD threads in each pool; 717262a0982SChuck Lever * return code is the size in bytes of the string 718262a0982SChuck Lever * On error: return code is zero or a negative errno value 719262a0982SChuck Lever */ 720eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 721eed2965aSGreg Banks { 722eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 723eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 724eed2965aSGreg Banks */ 725eed2965aSGreg Banks char *mesg = buf; 726eed2965aSGreg Banks int i; 727eed2965aSGreg Banks int rv; 728eed2965aSGreg Banks int len; 729bedbdd8bSNeil Brown int npools; 730eed2965aSGreg Banks int *nthreads; 731eed2965aSGreg Banks 732bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 733bedbdd8bSNeil Brown npools = nfsd_nrpools(); 734eed2965aSGreg Banks if (npools == 0) { 735eed2965aSGreg Banks /* 736eed2965aSGreg Banks * NFS is shut down. The admin can start it by 737eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 738eed2965aSGreg Banks * file, sorry. Report zero threads. 739eed2965aSGreg Banks */ 740bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 741eed2965aSGreg Banks strcpy(buf, "0\n"); 742eed2965aSGreg Banks return strlen(buf); 743eed2965aSGreg Banks } 744eed2965aSGreg Banks 745eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 746bedbdd8bSNeil Brown rv = -ENOMEM; 747eed2965aSGreg Banks if (nthreads == NULL) 748bedbdd8bSNeil Brown goto out_free; 749eed2965aSGreg Banks 750eed2965aSGreg Banks if (size > 0) { 751eed2965aSGreg Banks for (i = 0; i < npools; i++) { 752eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 753eed2965aSGreg Banks if (rv == -ENOENT) 754eed2965aSGreg Banks break; /* fewer numbers than pools */ 755eed2965aSGreg Banks if (rv) 756eed2965aSGreg Banks goto out_free; /* syntax error */ 757eed2965aSGreg Banks rv = -EINVAL; 758eed2965aSGreg Banks if (nthreads[i] < 0) 759eed2965aSGreg Banks goto out_free; 760eed2965aSGreg Banks } 761eed2965aSGreg Banks rv = nfsd_set_nrthreads(i, nthreads); 762eed2965aSGreg Banks if (rv) 763eed2965aSGreg Banks goto out_free; 764eed2965aSGreg Banks } 765eed2965aSGreg Banks 766eed2965aSGreg Banks rv = nfsd_get_nrthreads(npools, nthreads); 767eed2965aSGreg Banks if (rv) 768eed2965aSGreg Banks goto out_free; 769eed2965aSGreg Banks 770eed2965aSGreg Banks mesg = buf; 771eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 772eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 773eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 774eed2965aSGreg Banks len = strlen(mesg); 775eed2965aSGreg Banks size -= len; 776eed2965aSGreg Banks mesg += len; 777eed2965aSGreg Banks } 778413d63d7SJ. Bruce Fields rv = mesg - buf; 779eed2965aSGreg Banks out_free: 780eed2965aSGreg Banks kfree(nthreads); 781bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 782eed2965aSGreg Banks return rv; 783eed2965aSGreg Banks } 784eed2965aSGreg Banks 7853dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 78670c3b76cSNeilBrown { 78770c3b76cSNeilBrown char *mesg = buf; 7888daf220aSBenny Halevy char *vers, *minorp, sign; 789261758b5SChuck Lever int len, num, remaining; 7908daf220aSBenny Halevy unsigned minor; 79170c3b76cSNeilBrown ssize_t tlen = 0; 79270c3b76cSNeilBrown char *sep; 79370c3b76cSNeilBrown 79470c3b76cSNeilBrown if (size>0) { 79570c3b76cSNeilBrown if (nfsd_serv) 7966658d3a7SNeilBrown /* Cannot change versions without updating 7976658d3a7SNeilBrown * nfsd_serv->sv_xdrsize, and reallocing 7986658d3a7SNeilBrown * rq_argp and rq_resp 7996658d3a7SNeilBrown */ 80070c3b76cSNeilBrown return -EBUSY; 80170c3b76cSNeilBrown if (buf[size-1] != '\n') 80270c3b76cSNeilBrown return -EINVAL; 80370c3b76cSNeilBrown buf[size-1] = 0; 80470c3b76cSNeilBrown 80570c3b76cSNeilBrown vers = mesg; 80670c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 80770c3b76cSNeilBrown if (len <= 0) return -EINVAL; 80870c3b76cSNeilBrown do { 80970c3b76cSNeilBrown sign = *vers; 81070c3b76cSNeilBrown if (sign == '+' || sign == '-') 8118daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 81270c3b76cSNeilBrown else 8138daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 8148daf220aSBenny Halevy if (*minorp == '.') { 8158daf220aSBenny Halevy if (num < 4) 8168daf220aSBenny Halevy return -EINVAL; 8178daf220aSBenny Halevy minor = simple_strtoul(minorp+1, NULL, 0); 8188daf220aSBenny Halevy if (minor == 0) 8198daf220aSBenny Halevy return -EINVAL; 8208daf220aSBenny Halevy if (nfsd_minorversion(minor, sign == '-' ? 8218daf220aSBenny Halevy NFSD_CLEAR : NFSD_SET) < 0) 8228daf220aSBenny Halevy return -EINVAL; 8238daf220aSBenny Halevy goto next; 8248daf220aSBenny Halevy } 82570c3b76cSNeilBrown switch(num) { 82670c3b76cSNeilBrown case 2: 82770c3b76cSNeilBrown case 3: 82870c3b76cSNeilBrown case 4: 8296658d3a7SNeilBrown nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 83070c3b76cSNeilBrown break; 83170c3b76cSNeilBrown default: 83270c3b76cSNeilBrown return -EINVAL; 83370c3b76cSNeilBrown } 8348daf220aSBenny Halevy next: 83570c3b76cSNeilBrown vers += len + 1; 83670c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 83770c3b76cSNeilBrown /* If all get turned off, turn them back on, as 83870c3b76cSNeilBrown * having no versions is BAD 83970c3b76cSNeilBrown */ 8406658d3a7SNeilBrown nfsd_reset_versions(); 84170c3b76cSNeilBrown } 842261758b5SChuck Lever 84370c3b76cSNeilBrown /* Now write current state into reply buffer */ 84470c3b76cSNeilBrown len = 0; 84570c3b76cSNeilBrown sep = ""; 846261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 84770c3b76cSNeilBrown for (num=2 ; num <= 4 ; num++) 8486658d3a7SNeilBrown if (nfsd_vers(num, NFSD_AVAIL)) { 849261758b5SChuck Lever len = snprintf(buf, remaining, "%s%c%d", sep, 8506658d3a7SNeilBrown nfsd_vers(num, NFSD_TEST)?'+':'-', 85170c3b76cSNeilBrown num); 85270c3b76cSNeilBrown sep = " "; 853261758b5SChuck Lever 854261758b5SChuck Lever if (len > remaining) 855261758b5SChuck Lever break; 856261758b5SChuck Lever remaining -= len; 857261758b5SChuck Lever buf += len; 858261758b5SChuck Lever tlen += len; 85970c3b76cSNeilBrown } 8608daf220aSBenny Halevy if (nfsd_vers(4, NFSD_AVAIL)) 861261758b5SChuck Lever for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 862261758b5SChuck Lever minor++) { 863261758b5SChuck Lever len = snprintf(buf, remaining, " %c4.%u", 8648daf220aSBenny Halevy (nfsd_vers(4, NFSD_TEST) && 8658daf220aSBenny Halevy nfsd_minorversion(minor, NFSD_TEST)) ? 8668daf220aSBenny Halevy '+' : '-', 8678daf220aSBenny Halevy minor); 868261758b5SChuck Lever 869261758b5SChuck Lever if (len > remaining) 870261758b5SChuck Lever break; 871261758b5SChuck Lever remaining -= len; 872261758b5SChuck Lever buf += len; 873261758b5SChuck Lever tlen += len; 874261758b5SChuck Lever } 875261758b5SChuck Lever 876261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 877261758b5SChuck Lever if (len > remaining) 878261758b5SChuck Lever return -EINVAL; 879261758b5SChuck Lever return tlen + len; 88070c3b76cSNeilBrown } 88170c3b76cSNeilBrown 882262a0982SChuck Lever /** 883262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 884262a0982SChuck Lever * 885262a0982SChuck Lever * Input: 886262a0982SChuck Lever * buf: ignored 887262a0982SChuck Lever * size: zero 888262a0982SChuck Lever * Output: 889262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 890262a0982SChuck Lever * string containing positive or negative integer 891262a0982SChuck Lever * values representing the current status of each 892262a0982SChuck Lever * protocol version; 893262a0982SChuck Lever * return code is the size in bytes of the string 894262a0982SChuck Lever * On error: return code is zero or a negative errno value 895262a0982SChuck Lever * 896262a0982SChuck Lever * OR 897262a0982SChuck Lever * 898262a0982SChuck Lever * Input: 899262a0982SChuck Lever * buf: C string containing whitespace- 900262a0982SChuck Lever * separated positive or negative 901262a0982SChuck Lever * integer values representing NFS 902262a0982SChuck Lever * protocol versions to enable ("+n") 903262a0982SChuck Lever * or disable ("-n") 904262a0982SChuck Lever * size: non-zero length of C string in @buf 905262a0982SChuck Lever * Output: 906262a0982SChuck Lever * On success: status of zero or more protocol versions has 907262a0982SChuck Lever * been updated; passed-in buffer filled with 908262a0982SChuck Lever * '\n'-terminated C string containing positive 909262a0982SChuck Lever * or negative integer values representing the 910262a0982SChuck Lever * current status of each protocol version; 911262a0982SChuck Lever * return code is the size in bytes of the string 912262a0982SChuck Lever * On error: return code is zero or a negative errno value 913262a0982SChuck Lever */ 9143dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 9153dd98a3bSJeff Layton { 9163dd98a3bSJeff Layton ssize_t rv; 9173dd98a3bSJeff Layton 9183dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 9193dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 9203dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 9213dd98a3bSJeff Layton return rv; 9223dd98a3bSJeff Layton } 9233dd98a3bSJeff Layton 9244cd5dc75SChuck Lever /* 9250a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 9260a5372d8SChuck Lever * transports. 9270a5372d8SChuck Lever */ 9280a5372d8SChuck Lever static ssize_t __write_ports_names(char *buf) 9290a5372d8SChuck Lever { 9300a5372d8SChuck Lever if (nfsd_serv == NULL) 9310a5372d8SChuck Lever return 0; 932335c54bdSChuck Lever return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 9330a5372d8SChuck Lever } 9340a5372d8SChuck Lever 9350a5372d8SChuck Lever /* 9360b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 9370b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 9380b7c2f6fSChuck Lever * nfsd listener. 9390b7c2f6fSChuck Lever */ 9400b7c2f6fSChuck Lever static ssize_t __write_ports_addfd(char *buf) 9410b7c2f6fSChuck Lever { 9420b7c2f6fSChuck Lever char *mesg = buf; 9430b7c2f6fSChuck Lever int fd, err; 9440b7c2f6fSChuck Lever 9450b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 9460b7c2f6fSChuck Lever if (err != 0 || fd < 0) 9470b7c2f6fSChuck Lever return -EINVAL; 9480b7c2f6fSChuck Lever 9490b7c2f6fSChuck Lever err = nfsd_create_serv(); 9500b7c2f6fSChuck Lever if (err != 0) 9510b7c2f6fSChuck Lever return err; 9520b7c2f6fSChuck Lever 953bfba9ab4SChuck Lever err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 95478a8d7c8SJeff Layton if (err < 0) { 95578a8d7c8SJeff Layton svc_destroy(nfsd_serv); 95678a8d7c8SJeff Layton return err; 95778a8d7c8SJeff Layton } 958ea068badSChuck Lever 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 kfree(toclose); 98082d56591SChuck Lever return len; 98182d56591SChuck Lever } 98282d56591SChuck Lever 98382d56591SChuck Lever /* 9844eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 9854eb68c26SChuck Lever * a port number. 9864eb68c26SChuck Lever */ 9874eb68c26SChuck Lever static ssize_t __write_ports_addxprt(char *buf) 9884eb68c26SChuck Lever { 9894eb68c26SChuck Lever char transport[16]; 99037498292SChuck Lever struct svc_xprt *xprt; 9914eb68c26SChuck Lever int port, err; 9924eb68c26SChuck Lever 9934eb68c26SChuck Lever if (sscanf(buf, "%15s %4u", transport, &port) != 2) 9944eb68c26SChuck Lever return -EINVAL; 9954eb68c26SChuck Lever 9964be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 9974eb68c26SChuck Lever return -EINVAL; 9984eb68c26SChuck Lever 9994eb68c26SChuck Lever err = nfsd_create_serv(); 10004eb68c26SChuck Lever if (err != 0) 10014eb68c26SChuck Lever return err; 10024eb68c26SChuck Lever 10034eb68c26SChuck Lever err = svc_create_xprt(nfsd_serv, transport, 10044eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 100568717908SChuck Lever if (err < 0) 100637498292SChuck Lever goto out_err; 100737498292SChuck Lever 100837498292SChuck Lever err = svc_create_xprt(nfsd_serv, transport, 100937498292SChuck Lever PF_INET6, port, SVC_SOCK_ANONYMOUS); 101037498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 101137498292SChuck Lever goto out_close; 10120cd14a06SJeff Layton 10130cd14a06SJeff Layton /* Decrease the count, but don't shut down the service */ 10140cd14a06SJeff Layton nfsd_serv->sv_nrthreads--; 10154eb68c26SChuck Lever return 0; 101637498292SChuck Lever out_close: 101737498292SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); 101837498292SChuck Lever if (xprt != NULL) { 101937498292SChuck Lever svc_close_xprt(xprt); 102037498292SChuck Lever svc_xprt_put(xprt); 102137498292SChuck Lever } 102237498292SChuck Lever out_err: 10230cd14a06SJeff Layton svc_destroy(nfsd_serv); 102437498292SChuck Lever return err; 10254eb68c26SChuck Lever } 10264eb68c26SChuck Lever 10274eb68c26SChuck Lever /* 10284cd5dc75SChuck Lever * A transport listener is removed by writing a "-", it's transport 10294cd5dc75SChuck Lever * name, and it's port number. 10304cd5dc75SChuck Lever */ 10314cd5dc75SChuck Lever static ssize_t __write_ports_delxprt(char *buf) 10324cd5dc75SChuck Lever { 10334cd5dc75SChuck Lever struct svc_xprt *xprt; 10344cd5dc75SChuck Lever char transport[16]; 10354cd5dc75SChuck Lever int port; 10364cd5dc75SChuck Lever 10374cd5dc75SChuck Lever if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) 10384cd5dc75SChuck Lever return -EINVAL; 10394cd5dc75SChuck Lever 10404be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) 10414cd5dc75SChuck Lever return -EINVAL; 10424cd5dc75SChuck Lever 10434cd5dc75SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); 10444cd5dc75SChuck Lever if (xprt == NULL) 10454cd5dc75SChuck Lever return -ENOTCONN; 10464cd5dc75SChuck Lever 10474cd5dc75SChuck Lever svc_close_xprt(xprt); 10484cd5dc75SChuck Lever svc_xprt_put(xprt); 10494cd5dc75SChuck Lever return 0; 10504cd5dc75SChuck Lever } 10514cd5dc75SChuck Lever 1052bedbdd8bSNeil Brown static ssize_t __write_ports(struct file *file, char *buf, size_t size) 105380212d59SNeilBrown { 10540a5372d8SChuck Lever if (size == 0) 10550a5372d8SChuck Lever return __write_ports_names(buf); 10560b7c2f6fSChuck Lever 10570b7c2f6fSChuck Lever if (isdigit(buf[0])) 10580b7c2f6fSChuck Lever return __write_ports_addfd(buf); 105982d56591SChuck Lever 106082d56591SChuck Lever if (buf[0] == '-' && isdigit(buf[1])) 106182d56591SChuck Lever return __write_ports_delfd(buf); 10624eb68c26SChuck Lever 10634eb68c26SChuck Lever if (isalpha(buf[0])) 10644eb68c26SChuck Lever return __write_ports_addxprt(buf); 10654cd5dc75SChuck Lever 10664cd5dc75SChuck Lever if (buf[0] == '-' && isalpha(buf[1])) 10674cd5dc75SChuck Lever return __write_ports_delxprt(buf); 10684cd5dc75SChuck Lever 1069b41b66d6SNeilBrown return -EINVAL; 1070b41b66d6SNeilBrown } 107180212d59SNeilBrown 1072262a0982SChuck Lever /** 1073262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 1074262a0982SChuck Lever * 1075262a0982SChuck Lever * Input: 1076262a0982SChuck Lever * buf: ignored 1077262a0982SChuck Lever * size: zero 1078262a0982SChuck Lever * Output: 1079262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 1080262a0982SChuck Lever * string containing a whitespace-separated list of 1081262a0982SChuck Lever * named NFSD listeners; 1082262a0982SChuck Lever * return code is the size in bytes of the string 1083262a0982SChuck Lever * On error: return code is zero or a negative errno value 1084262a0982SChuck Lever * 1085262a0982SChuck Lever * OR 1086262a0982SChuck Lever * 1087262a0982SChuck Lever * Input: 1088262a0982SChuck Lever * buf: C string containing an unsigned 1089262a0982SChuck Lever * integer value representing a bound 1090262a0982SChuck Lever * but unconnected socket that is to be 1091c71206a7SChuck Lever * used as an NFSD listener; listen(3) 1092c71206a7SChuck Lever * must be called for a SOCK_STREAM 1093c71206a7SChuck Lever * socket, otherwise it is ignored 1094262a0982SChuck Lever * size: non-zero length of C string in @buf 1095262a0982SChuck Lever * Output: 1096262a0982SChuck Lever * On success: NFS service is started; 1097262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1098262a0982SChuck Lever * string containing a unique alphanumeric name of 1099262a0982SChuck Lever * the listener; 1100262a0982SChuck Lever * return code is the size in bytes of the string 1101262a0982SChuck Lever * On error: return code is a negative errno value 1102262a0982SChuck Lever * 1103262a0982SChuck Lever * OR 1104262a0982SChuck Lever * 1105262a0982SChuck Lever * Input: 1106262a0982SChuck Lever * buf: C string containing a "-" followed 1107262a0982SChuck Lever * by an integer value representing a 1108262a0982SChuck Lever * previously passed in socket file 1109262a0982SChuck Lever * descriptor 1110262a0982SChuck Lever * size: non-zero length of C string in @buf 1111262a0982SChuck Lever * Output: 1112262a0982SChuck Lever * On success: NFS service no longer listens on that socket; 1113262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1114262a0982SChuck Lever * string containing a unique name of the listener; 1115262a0982SChuck Lever * return code is the size in bytes of the string 1116262a0982SChuck Lever * On error: return code is a negative errno value 1117262a0982SChuck Lever * 1118262a0982SChuck Lever * OR 1119262a0982SChuck Lever * 1120262a0982SChuck Lever * Input: 1121262a0982SChuck Lever * buf: C string containing a transport 1122262a0982SChuck Lever * name and an unsigned integer value 1123262a0982SChuck Lever * representing the port to listen on, 1124262a0982SChuck Lever * separated by whitespace 1125262a0982SChuck Lever * size: non-zero length of C string in @buf 1126262a0982SChuck Lever * Output: 1127262a0982SChuck Lever * On success: returns zero; NFS service is started 1128262a0982SChuck Lever * On error: return code is a negative errno value 1129262a0982SChuck Lever * 1130262a0982SChuck Lever * OR 1131262a0982SChuck Lever * 1132262a0982SChuck Lever * Input: 1133262a0982SChuck Lever * buf: C string containing a "-" followed 1134262a0982SChuck Lever * by a transport name and an unsigned 1135262a0982SChuck Lever * integer value representing the port 1136262a0982SChuck Lever * to listen on, separated by whitespace 1137262a0982SChuck Lever * size: non-zero length of C string in @buf 1138262a0982SChuck Lever * Output: 1139262a0982SChuck Lever * On success: returns zero; NFS service no longer listens 1140262a0982SChuck Lever * on that transport 1141262a0982SChuck Lever * On error: return code is a negative errno value 1142262a0982SChuck Lever */ 1143bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 1144bedbdd8bSNeil Brown { 1145bedbdd8bSNeil Brown ssize_t rv; 11463dd98a3bSJeff Layton 1147bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1148bedbdd8bSNeil Brown rv = __write_ports(file, buf, size); 1149bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1150bedbdd8bSNeil Brown return rv; 1151bedbdd8bSNeil Brown } 1152bedbdd8bSNeil Brown 1153bedbdd8bSNeil Brown 1154596bbe53SNeilBrown int nfsd_max_blksize; 1155596bbe53SNeilBrown 1156262a0982SChuck Lever /** 1157262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 1158262a0982SChuck Lever * 1159262a0982SChuck Lever * Input: 1160262a0982SChuck Lever * buf: ignored 1161262a0982SChuck Lever * size: zero 1162262a0982SChuck Lever * 1163262a0982SChuck Lever * OR 1164262a0982SChuck Lever * 1165262a0982SChuck Lever * Input: 1166262a0982SChuck Lever * buf: C string containing an unsigned 1167262a0982SChuck Lever * integer value representing the new 1168262a0982SChuck Lever * NFS blksize 1169262a0982SChuck Lever * size: non-zero length of C string in @buf 1170262a0982SChuck Lever * Output: 1171262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1172262a0982SChuck Lever * containing numeric value of the current NFS blksize 1173262a0982SChuck Lever * setting; 1174262a0982SChuck Lever * return code is the size in bytes of the string 1175262a0982SChuck Lever * On error: return code is zero or a negative errno value 1176262a0982SChuck Lever */ 1177596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 1178596bbe53SNeilBrown { 1179596bbe53SNeilBrown char *mesg = buf; 1180596bbe53SNeilBrown if (size > 0) { 1181596bbe53SNeilBrown int bsize; 1182596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 1183596bbe53SNeilBrown if (rv) 1184596bbe53SNeilBrown return rv; 1185596bbe53SNeilBrown /* force bsize into allowed range and 1186596bbe53SNeilBrown * required alignment. 1187596bbe53SNeilBrown */ 1188596bbe53SNeilBrown if (bsize < 1024) 1189596bbe53SNeilBrown bsize = 1024; 1190596bbe53SNeilBrown if (bsize > NFSSVC_MAXBLKSIZE) 1191596bbe53SNeilBrown bsize = NFSSVC_MAXBLKSIZE; 1192596bbe53SNeilBrown bsize &= ~(1024-1); 1193bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 11947fa53cc8SJ. Bruce Fields if (nfsd_serv) { 1195bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1196596bbe53SNeilBrown return -EBUSY; 1197596bbe53SNeilBrown } 1198596bbe53SNeilBrown nfsd_max_blksize = bsize; 1199bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1200596bbe53SNeilBrown } 1201e06b6405SChuck Lever 1202e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 1203e06b6405SChuck Lever nfsd_max_blksize); 1204596bbe53SNeilBrown } 1205596bbe53SNeilBrown 120670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 1207f0135740SJ. Bruce Fields static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 12081da177e4SLinus Torvalds { 12091da177e4SLinus Torvalds char *mesg = buf; 1210f0135740SJ. Bruce Fields int rv, i; 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds if (size > 0) { 12133dd98a3bSJeff Layton if (nfsd_serv) 12143dd98a3bSJeff Layton return -EBUSY; 1215f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 12161da177e4SLinus Torvalds if (rv) 12171da177e4SLinus Torvalds return rv; 1218e7b184f1SJ. Bruce Fields /* 1219e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 1220e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 1221e7b184f1SJ. Bruce Fields * extremes are: 1222e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 1223e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 1224e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 1225e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 1226e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 1227e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 1228e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 1229e7b184f1SJ. Bruce Fields */ 1230f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 12311da177e4SLinus Torvalds return -EINVAL; 1232f0135740SJ. Bruce Fields *time = i; 12331da177e4SLinus Torvalds } 1234e06b6405SChuck Lever 1235f0135740SJ. Bruce Fields return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 1236f0135740SJ. Bruce Fields } 1237f0135740SJ. Bruce Fields 1238f0135740SJ. Bruce Fields static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 1239f0135740SJ. Bruce Fields { 1240f0135740SJ. Bruce Fields ssize_t rv; 1241f0135740SJ. Bruce Fields 1242f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 1243f0135740SJ. Bruce Fields rv = __nfsd4_write_time(file, buf, size, time); 1244f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 1245f0135740SJ. Bruce Fields return rv; 12461da177e4SLinus Torvalds } 12471da177e4SLinus Torvalds 1248262a0982SChuck Lever /** 1249262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 1250262a0982SChuck Lever * 1251262a0982SChuck Lever * Input: 1252262a0982SChuck Lever * buf: ignored 1253262a0982SChuck Lever * size: zero 1254262a0982SChuck Lever * 1255262a0982SChuck Lever * OR 1256262a0982SChuck Lever * 1257262a0982SChuck Lever * Input: 1258262a0982SChuck Lever * buf: C string containing an unsigned 1259262a0982SChuck Lever * integer value representing the new 1260262a0982SChuck Lever * NFSv4 lease expiry time 1261262a0982SChuck Lever * size: non-zero length of C string in @buf 1262262a0982SChuck Lever * Output: 1263262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1264262a0982SChuck Lever * string containing unsigned integer value of the 1265262a0982SChuck Lever * current lease expiry time; 1266262a0982SChuck Lever * return code is the size in bytes of the string 1267262a0982SChuck Lever * On error: return code is zero or a negative errno value 1268262a0982SChuck Lever */ 12693dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 12703dd98a3bSJeff Layton { 1271f0135740SJ. Bruce Fields return nfsd4_write_time(file, buf, size, &nfsd4_lease); 12723dd98a3bSJeff Layton } 12733dd98a3bSJeff Layton 1274efc4bb4fSJ. Bruce Fields /** 1275efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1276efc4bb4fSJ. Bruce Fields * 1277efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1278efc4bb4fSJ. Bruce Fields * 1279efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1280efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1281efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1282efc4bb4fSJ. Bruce Fields * anyway.) 1283efc4bb4fSJ. Bruce Fields */ 1284efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1285efc4bb4fSJ. Bruce Fields { 1286efc4bb4fSJ. Bruce Fields return nfsd4_write_time(file, buf, size, &nfsd4_grace); 1287efc4bb4fSJ. Bruce Fields } 1288efc4bb4fSJ. Bruce Fields 12893dd98a3bSJeff Layton extern char *nfs4_recoverydir(void); 12903dd98a3bSJeff Layton 12913dd98a3bSJeff Layton static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) 12920964a3d3SNeilBrown { 12930964a3d3SNeilBrown char *mesg = buf; 12940964a3d3SNeilBrown char *recdir; 12950964a3d3SNeilBrown int len, status; 12960964a3d3SNeilBrown 12973dd98a3bSJeff Layton if (size > 0) { 12983dd98a3bSJeff Layton if (nfsd_serv) 12993dd98a3bSJeff Layton return -EBUSY; 13003dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 13010964a3d3SNeilBrown return -EINVAL; 13020964a3d3SNeilBrown buf[size-1] = 0; 13030964a3d3SNeilBrown 13040964a3d3SNeilBrown recdir = mesg; 13050964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 13060964a3d3SNeilBrown if (len <= 0) 13070964a3d3SNeilBrown return -EINVAL; 13080964a3d3SNeilBrown 13090964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 131069049961SAndi Kleen if (status) 131169049961SAndi Kleen return status; 13123dd98a3bSJeff Layton } 13133d72ab8fSChuck Lever 13143d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 13153d72ab8fSChuck Lever nfs4_recoverydir()); 13160964a3d3SNeilBrown } 13173dd98a3bSJeff Layton 1318262a0982SChuck Lever /** 1319262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1320262a0982SChuck Lever * 1321262a0982SChuck Lever * Input: 1322262a0982SChuck Lever * buf: ignored 1323262a0982SChuck Lever * size: zero 1324262a0982SChuck Lever * 1325262a0982SChuck Lever * OR 1326262a0982SChuck Lever * 1327262a0982SChuck Lever * Input: 1328262a0982SChuck Lever * buf: C string containing the pathname 1329262a0982SChuck Lever * of the directory on a local file 1330262a0982SChuck Lever * system containing permanent NFSv4 1331262a0982SChuck Lever * recovery data 1332262a0982SChuck Lever * size: non-zero length of C string in @buf 1333262a0982SChuck Lever * Output: 1334262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1335262a0982SChuck Lever * containing the current recovery pathname setting; 1336262a0982SChuck Lever * return code is the size in bytes of the string 1337262a0982SChuck Lever * On error: return code is zero or a negative errno value 1338262a0982SChuck Lever */ 13393dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 13403dd98a3bSJeff Layton { 13413dd98a3bSJeff Layton ssize_t rv; 13423dd98a3bSJeff Layton 13433dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 13443dd98a3bSJeff Layton rv = __write_recoverydir(file, buf, size); 13453dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 13463dd98a3bSJeff Layton return rv; 13473dd98a3bSJeff Layton } 13483dd98a3bSJeff Layton 134970c3b76cSNeilBrown #endif 13500964a3d3SNeilBrown 13511da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 13521da177e4SLinus Torvalds /* 13531da177e4SLinus Torvalds * populating the filesystem. 13541da177e4SLinus Torvalds */ 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 13571da177e4SLinus Torvalds { 13581da177e4SLinus Torvalds static struct tree_descr nfsd_files[] = { 13591da177e4SLinus Torvalds [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 13601da177e4SLinus Torvalds [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 13611da177e4SLinus Torvalds [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 13621da177e4SLinus Torvalds [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 13631da177e4SLinus Torvalds [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 13641da177e4SLinus Torvalds [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 13651da177e4SLinus Torvalds [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 13661da177e4SLinus Torvalds [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 1367e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1368e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 13694373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13704373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 137117efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 137217efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13731da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13741da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1375eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 137603cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 137770c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 137880212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1379596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13801da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13811da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1382efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 13830964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 13841da177e4SLinus Torvalds #endif 13851da177e4SLinus Torvalds /* last one */ {""} 13861da177e4SLinus Torvalds }; 13871da177e4SLinus Torvalds return simple_fill_super(sb, 0x6e667364, nfsd_files); 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds 1390454e2398SDavid Howells static int nfsd_get_sb(struct file_system_type *fs_type, 1391454e2398SDavid Howells int flags, const char *dev_name, void *data, struct vfsmount *mnt) 13921da177e4SLinus Torvalds { 1393454e2398SDavid Howells return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds 13961da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 13971da177e4SLinus Torvalds .owner = THIS_MODULE, 13981da177e4SLinus Torvalds .name = "nfsd", 13991da177e4SLinus Torvalds .get_sb = nfsd_get_sb, 14001da177e4SLinus Torvalds .kill_sb = kill_litter_super, 14011da177e4SLinus Torvalds }; 14021da177e4SLinus Torvalds 1403e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1404e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1405e331f606SJ. Bruce Fields { 1406e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1407e331f606SJ. Bruce Fields 1408e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1409e331f606SJ. Bruce Fields if (!entry) 1410e331f606SJ. Bruce Fields return -ENOMEM; 14119ef2db26SDenis V. Lunev entry = proc_create("exports", 0, entry, &exports_operations); 1412e331f606SJ. Bruce Fields if (!entry) 1413e331f606SJ. Bruce Fields return -ENOMEM; 1414e331f606SJ. Bruce Fields return 0; 1415e331f606SJ. Bruce Fields } 1416e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1417e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1418e331f606SJ. Bruce Fields { 1419e331f606SJ. Bruce Fields return 0; 1420e331f606SJ. Bruce Fields } 1421e331f606SJ. Bruce Fields #endif 1422e331f606SJ. Bruce Fields 14231da177e4SLinus Torvalds static int __init init_nfsd(void) 14241da177e4SLinus Torvalds { 14251da177e4SLinus Torvalds int retval; 14261da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 14271da177e4SLinus Torvalds 1428e8ff2a84SJ. Bruce Fields retval = nfs4_state_init(); /* nfs4 locking state */ 1429e8ff2a84SJ. Bruce Fields if (retval) 1430e8ff2a84SJ. Bruce Fields return retval; 14311da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1432d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1433d5c3428bSJ. Bruce Fields if (retval) 1434d5c3428bSJ. Bruce Fields goto out_free_stat; 1435dbf847ecSJ. Bruce Fields retval = nfsd_export_init(); 1436dbf847ecSJ. Bruce Fields if (retval) 1437dbf847ecSJ. Bruce Fields goto out_free_cache; 14381da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1439dbf847ecSJ. Bruce Fields retval = nfsd_idmap_init(); 1440dbf847ecSJ. Bruce Fields if (retval) 1441dbf847ecSJ. Bruce Fields goto out_free_lockd; 1442e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1443e331f606SJ. Bruce Fields if (retval) 1444e331f606SJ. Bruce Fields goto out_free_idmap; 14451da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 144626808d3fSJ. Bruce Fields if (retval) 144726808d3fSJ. Bruce Fields goto out_free_all; 144826808d3fSJ. Bruce Fields return 0; 144926808d3fSJ. Bruce Fields out_free_all: 14501da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14511da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1452e331f606SJ. Bruce Fields out_free_idmap: 1453dbf847ecSJ. Bruce Fields nfsd_idmap_shutdown(); 1454dbf847ecSJ. Bruce Fields out_free_lockd: 14551da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1456e331f606SJ. Bruce Fields nfsd_export_shutdown(); 1457dbf847ecSJ. Bruce Fields out_free_cache: 1458e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1459d5c3428bSJ. Bruce Fields out_free_stat: 1460d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 146146b25895SJ. Bruce Fields nfsd4_free_slabs(); 14621da177e4SLinus Torvalds return retval; 14631da177e4SLinus Torvalds } 14641da177e4SLinus Torvalds 14651da177e4SLinus Torvalds static void __exit exit_nfsd(void) 14661da177e4SLinus Torvalds { 14671da177e4SLinus Torvalds nfsd_export_shutdown(); 1468d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 14691da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14701da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 14711da177e4SLinus Torvalds nfsd_stat_shutdown(); 14721da177e4SLinus Torvalds nfsd_lockd_shutdown(); 14731da177e4SLinus Torvalds nfsd_idmap_shutdown(); 1474e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 14751da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 14761da177e4SLinus Torvalds } 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 14791da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 14801da177e4SLinus Torvalds module_init(init_nfsd) 14811da177e4SLinus Torvalds module_exit(exit_nfsd) 1482