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 91da177e4SLinus Torvalds #include <linux/module.h> 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds #include <linux/linkage.h> 121da177e4SLinus Torvalds #include <linux/time.h> 131da177e4SLinus Torvalds #include <linux/errno.h> 141da177e4SLinus Torvalds #include <linux/fs.h> 153f8206d4SAl Viro #include <linux/namei.h> 161da177e4SLinus Torvalds #include <linux/fcntl.h> 171da177e4SLinus Torvalds #include <linux/net.h> 181da177e4SLinus Torvalds #include <linux/in.h> 191da177e4SLinus Torvalds #include <linux/syscalls.h> 201da177e4SLinus Torvalds #include <linux/unistd.h> 211da177e4SLinus Torvalds #include <linux/slab.h> 221da177e4SLinus Torvalds #include <linux/proc_fs.h> 231da177e4SLinus Torvalds #include <linux/seq_file.h> 241da177e4SLinus Torvalds #include <linux/pagemap.h> 251da177e4SLinus Torvalds #include <linux/init.h> 264373ea84SWendy Cheng #include <linux/inet.h> 2770c3b76cSNeilBrown #include <linux/string.h> 2880212d59SNeilBrown #include <linux/smp_lock.h> 29b41b66d6SNeilBrown #include <linux/ctype.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds #include <linux/nfs.h> 321da177e4SLinus Torvalds #include <linux/nfsd_idmap.h> 33b41b66d6SNeilBrown #include <linux/lockd/bind.h> 341da177e4SLinus Torvalds #include <linux/sunrpc/svc.h> 3580212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 361da177e4SLinus Torvalds #include <linux/nfsd/nfsd.h> 371da177e4SLinus Torvalds #include <linux/nfsd/cache.h> 381da177e4SLinus Torvalds #include <linux/nfsd/xdr.h> 391da177e4SLinus Torvalds #include <linux/nfsd/syscall.h> 404373ea84SWendy Cheng #include <linux/lockd/lockd.h> 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #include <asm/uaccess.h> 43f15364bdSAurélien Charbon #include <net/ipv6.h> 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds /* 461da177e4SLinus Torvalds * We have a single directory with 9 nodes in it. 471da177e4SLinus Torvalds */ 481da177e4SLinus Torvalds enum { 491da177e4SLinus Torvalds NFSD_Root = 1, 501da177e4SLinus Torvalds NFSD_Svc, 511da177e4SLinus Torvalds NFSD_Add, 521da177e4SLinus Torvalds NFSD_Del, 531da177e4SLinus Torvalds NFSD_Export, 541da177e4SLinus Torvalds NFSD_Unexport, 551da177e4SLinus Torvalds NFSD_Getfd, 561da177e4SLinus Torvalds NFSD_Getfs, 571da177e4SLinus Torvalds NFSD_List, 581da177e4SLinus Torvalds NFSD_Fh, 594373ea84SWendy Cheng NFSD_FO_UnlockIP, 6017efa372SWendy Cheng NFSD_FO_UnlockFS, 611da177e4SLinus Torvalds NFSD_Threads, 62eed2965aSGreg Banks NFSD_Pool_Threads, 6303cf6c9fSGreg Banks NFSD_Pool_Stats, 6470c3b76cSNeilBrown NFSD_Versions, 6580212d59SNeilBrown NFSD_Ports, 66596bbe53SNeilBrown NFSD_MaxBlkSize, 6770c3b76cSNeilBrown /* 6870c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 6970c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 7070c3b76cSNeilBrown */ 7170c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 721da177e4SLinus Torvalds NFSD_Leasetime, 730964a3d3SNeilBrown NFSD_RecoveryDir, 7470c3b76cSNeilBrown #endif 751da177e4SLinus Torvalds }; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds /* 781da177e4SLinus Torvalds * write() for these nodes. 791da177e4SLinus Torvalds */ 801da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size); 811da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size); 821da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size); 831da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size); 841da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size); 851da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size); 861da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size); 871da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 88b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 89b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 901da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 91eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 9270c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 9380212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 94596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 9570c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 961da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 970964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 9870c3b76cSNeilBrown #endif 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 1011da177e4SLinus Torvalds [NFSD_Svc] = write_svc, 1021da177e4SLinus Torvalds [NFSD_Add] = write_add, 1031da177e4SLinus Torvalds [NFSD_Del] = write_del, 1041da177e4SLinus Torvalds [NFSD_Export] = write_export, 1051da177e4SLinus Torvalds [NFSD_Unexport] = write_unexport, 1061da177e4SLinus Torvalds [NFSD_Getfd] = write_getfd, 1071da177e4SLinus Torvalds [NFSD_Getfs] = write_getfs, 1081da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 109b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 110b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 1111da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 112eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 11370c3b76cSNeilBrown [NFSD_Versions] = write_versions, 11480212d59SNeilBrown [NFSD_Ports] = write_ports, 115596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 11670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 1171da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 1180964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 11970c3b76cSNeilBrown #endif 1201da177e4SLinus Torvalds }; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1231da177e4SLinus Torvalds { 1247eaa36e2SJosef "Jeff" Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 1251da177e4SLinus Torvalds char *data; 1261da177e4SLinus Torvalds ssize_t rv; 1271da177e4SLinus Torvalds 128e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1291da177e4SLinus Torvalds return -EINVAL; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1321da177e4SLinus Torvalds if (IS_ERR(data)) 1331da177e4SLinus Torvalds return PTR_ERR(data); 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1368971a101SNeilBrown if (rv >= 0) { 1371da177e4SLinus Torvalds simple_transaction_set(file, rv); 1381da177e4SLinus Torvalds rv = size; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds return rv; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1437390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1447390022dSNeilBrown { 1457390022dSNeilBrown if (! file->private_data) { 1467390022dSNeilBrown /* An attempt to read a transaction file without writing 1477390022dSNeilBrown * causes a 0-byte write so that the file can return 1487390022dSNeilBrown * state information 1497390022dSNeilBrown */ 1507390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1517390022dSNeilBrown if (rv < 0) 1527390022dSNeilBrown return rv; 1537390022dSNeilBrown } 1547390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1557390022dSNeilBrown } 1567390022dSNeilBrown 1574b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1581da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1597390022dSNeilBrown .read = nfsctl_transaction_read, 1601da177e4SLinus Torvalds .release = simple_transaction_release, 1611da177e4SLinus Torvalds }; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds static int exports_open(struct inode *inode, struct file *file) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds return seq_open(file, &nfs_exports_op); 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds 1684b6f5d20SArjan van de Ven static const struct file_operations exports_operations = { 1691da177e4SLinus Torvalds .open = exports_open, 1701da177e4SLinus Torvalds .read = seq_read, 1711da177e4SLinus Torvalds .llseek = seq_lseek, 1721da177e4SLinus Torvalds .release = seq_release, 1739ef2db26SDenis V. Lunev .owner = THIS_MODULE, 1741da177e4SLinus Torvalds }; 1751da177e4SLinus Torvalds 17603cf6c9fSGreg Banks extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); 17703cf6c9fSGreg Banks 17803cf6c9fSGreg Banks static struct file_operations pool_stats_operations = { 17903cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 18003cf6c9fSGreg Banks .read = seq_read, 18103cf6c9fSGreg Banks .llseek = seq_lseek, 18203cf6c9fSGreg Banks .release = seq_release, 18303cf6c9fSGreg Banks .owner = THIS_MODULE, 18403cf6c9fSGreg Banks }; 18503cf6c9fSGreg Banks 1861da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 1871da177e4SLinus Torvalds /* 1881da177e4SLinus Torvalds * payload - write methods 1891da177e4SLinus Torvalds */ 1901da177e4SLinus Torvalds 191262a0982SChuck Lever /** 192262a0982SChuck Lever * write_svc - Start kernel's NFSD server 193262a0982SChuck Lever * 194262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/threads is preferred. 195262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 196262a0982SChuck Lever * 197262a0982SChuck Lever * Input: 198262a0982SChuck Lever * buf: struct nfsctl_svc 199262a0982SChuck Lever * svc_port: port number of this 200262a0982SChuck Lever * server's listener 201262a0982SChuck Lever * svc_nthreads: number of threads to start 202262a0982SChuck Lever * size: size in bytes of passed in nfsctl_svc 203262a0982SChuck Lever * Output: 204262a0982SChuck Lever * On success: returns zero 205262a0982SChuck Lever * On error: return code is negative errno value 206262a0982SChuck Lever */ 2071da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size) 2081da177e4SLinus Torvalds { 2091da177e4SLinus Torvalds struct nfsctl_svc *data; 21082e12fe9SNeilBrown int err; 2111da177e4SLinus Torvalds if (size < sizeof(*data)) 2121da177e4SLinus Torvalds return -EINVAL; 2131da177e4SLinus Torvalds data = (struct nfsctl_svc*) buf; 21482e12fe9SNeilBrown err = nfsd_svc(data->svc_port, data->svc_nthreads); 21582e12fe9SNeilBrown if (err < 0) 21682e12fe9SNeilBrown return err; 21782e12fe9SNeilBrown return 0; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 220262a0982SChuck Lever /** 221262a0982SChuck Lever * write_add - Add or modify client entry in auth unix cache 222262a0982SChuck Lever * 223262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 224262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 225262a0982SChuck Lever * 226262a0982SChuck Lever * Input: 227262a0982SChuck Lever * buf: struct nfsctl_client 228262a0982SChuck Lever * cl_ident: '\0'-terminated C string 229262a0982SChuck Lever * containing domain name 230262a0982SChuck Lever * of client 231262a0982SChuck Lever * cl_naddr: no. of items in cl_addrlist 232262a0982SChuck Lever * cl_addrlist: array of client addresses 233262a0982SChuck Lever * cl_fhkeytype: ignored 234262a0982SChuck Lever * cl_fhkeylen: ignored 235262a0982SChuck Lever * cl_fhkey: ignored 236262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 237262a0982SChuck Lever * Output: 238262a0982SChuck Lever * On success: returns zero 239262a0982SChuck Lever * On error: return code is negative errno value 240262a0982SChuck Lever * 241262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 242262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 243262a0982SChuck Lever */ 2441da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size) 2451da177e4SLinus Torvalds { 2461da177e4SLinus Torvalds struct nfsctl_client *data; 2471da177e4SLinus Torvalds if (size < sizeof(*data)) 2481da177e4SLinus Torvalds return -EINVAL; 2491da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2501da177e4SLinus Torvalds return exp_addclient(data); 2511da177e4SLinus Torvalds } 2521da177e4SLinus Torvalds 253262a0982SChuck Lever /** 254262a0982SChuck Lever * write_del - Remove client from auth unix cache 255262a0982SChuck Lever * 256262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 257262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 258262a0982SChuck Lever * 259262a0982SChuck Lever * Input: 260262a0982SChuck Lever * buf: struct nfsctl_client 261262a0982SChuck Lever * cl_ident: '\0'-terminated C string 262262a0982SChuck Lever * containing domain name 263262a0982SChuck Lever * of client 264262a0982SChuck Lever * cl_naddr: ignored 265262a0982SChuck Lever * cl_addrlist: ignored 266262a0982SChuck Lever * cl_fhkeytype: ignored 267262a0982SChuck Lever * cl_fhkeylen: ignored 268262a0982SChuck Lever * cl_fhkey: ignored 269262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 270262a0982SChuck Lever * Output: 271262a0982SChuck Lever * On success: returns zero 272262a0982SChuck Lever * On error: return code is negative errno value 273262a0982SChuck Lever * 274262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 275262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 276262a0982SChuck Lever */ 2771da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size) 2781da177e4SLinus Torvalds { 2791da177e4SLinus Torvalds struct nfsctl_client *data; 2801da177e4SLinus Torvalds if (size < sizeof(*data)) 2811da177e4SLinus Torvalds return -EINVAL; 2821da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2831da177e4SLinus Torvalds return exp_delclient(data); 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds 286262a0982SChuck Lever /** 287262a0982SChuck Lever * write_export - Export part or all of a local file system 288262a0982SChuck Lever * 289262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 290262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 291262a0982SChuck Lever * 292262a0982SChuck Lever * Input: 293262a0982SChuck Lever * buf: struct nfsctl_export 294262a0982SChuck Lever * ex_client: '\0'-terminated C string 295262a0982SChuck Lever * containing domain name 296262a0982SChuck Lever * of client allowed to access 297262a0982SChuck Lever * this export 298262a0982SChuck Lever * ex_path: '\0'-terminated C string 299262a0982SChuck Lever * containing pathname of 300262a0982SChuck Lever * directory in local file system 301262a0982SChuck Lever * ex_dev: fsid to use for this export 302262a0982SChuck Lever * ex_ino: ignored 303262a0982SChuck Lever * ex_flags: export flags for this export 304262a0982SChuck Lever * ex_anon_uid: UID to use for anonymous 305262a0982SChuck Lever * requests 306262a0982SChuck Lever * ex_anon_gid: GID to use for anonymous 307262a0982SChuck Lever * requests 308262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 309262a0982SChuck Lever * Output: 310262a0982SChuck Lever * On success: returns zero 311262a0982SChuck Lever * On error: return code is negative errno value 312262a0982SChuck Lever */ 3131da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size) 3141da177e4SLinus Torvalds { 3151da177e4SLinus Torvalds struct nfsctl_export *data; 3161da177e4SLinus Torvalds if (size < sizeof(*data)) 3171da177e4SLinus Torvalds return -EINVAL; 3181da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3191da177e4SLinus Torvalds return exp_export(data); 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 322262a0982SChuck Lever /** 323262a0982SChuck Lever * write_unexport - Unexport a previously exported file system 324262a0982SChuck Lever * 325262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 326262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 327262a0982SChuck Lever * 328262a0982SChuck Lever * Input: 329262a0982SChuck Lever * buf: struct nfsctl_export 330262a0982SChuck Lever * ex_client: '\0'-terminated C string 331262a0982SChuck Lever * containing domain name 332262a0982SChuck Lever * of client no longer allowed 333262a0982SChuck Lever * to access this export 334262a0982SChuck Lever * ex_path: '\0'-terminated C string 335262a0982SChuck Lever * containing pathname of 336262a0982SChuck Lever * directory in local file system 337262a0982SChuck Lever * ex_dev: ignored 338262a0982SChuck Lever * ex_ino: ignored 339262a0982SChuck Lever * ex_flags: ignored 340262a0982SChuck Lever * ex_anon_uid: ignored 341262a0982SChuck Lever * ex_anon_gid: ignored 342262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 343262a0982SChuck Lever * Output: 344262a0982SChuck Lever * On success: returns zero 345262a0982SChuck Lever * On error: return code is negative errno value 346262a0982SChuck Lever */ 3471da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size) 3481da177e4SLinus Torvalds { 3491da177e4SLinus Torvalds struct nfsctl_export *data; 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds if (size < sizeof(*data)) 3521da177e4SLinus Torvalds return -EINVAL; 3531da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3541da177e4SLinus Torvalds return exp_unexport(data); 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds 357262a0982SChuck Lever /** 358262a0982SChuck Lever * write_getfs - Get a variable-length NFS file handle by path 359262a0982SChuck Lever * 360262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 361262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 362262a0982SChuck Lever * 363262a0982SChuck Lever * Input: 364262a0982SChuck Lever * buf: struct nfsctl_fsparm 365262a0982SChuck Lever * gd_addr: socket address of client 366262a0982SChuck Lever * gd_path: '\0'-terminated C string 367262a0982SChuck Lever * containing pathname of 368262a0982SChuck Lever * directory in local file system 369262a0982SChuck Lever * gd_maxlen: maximum size of returned file 370262a0982SChuck Lever * handle 371262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fsparm 372262a0982SChuck Lever * Output: 373262a0982SChuck Lever * On success: passed-in buffer filled with a knfsd_fh structure 374262a0982SChuck Lever * (a variable-length raw NFS file handle); 375262a0982SChuck Lever * return code is the size in bytes of the file handle 376262a0982SChuck Lever * On error: return code is negative errno value 377262a0982SChuck Lever * 378262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 379262a0982SChuck Lever * is the same size as a struct sockaddr_in. 380262a0982SChuck Lever */ 3811da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size) 3821da177e4SLinus Torvalds { 3831da177e4SLinus Torvalds struct nfsctl_fsparm *data; 3841da177e4SLinus Torvalds struct sockaddr_in *sin; 3851da177e4SLinus Torvalds struct auth_domain *clp; 3861da177e4SLinus Torvalds int err = 0; 3871da177e4SLinus Torvalds struct knfsd_fh *res; 388f15364bdSAurélien Charbon struct in6_addr in6; 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds if (size < sizeof(*data)) 3911da177e4SLinus Torvalds return -EINVAL; 3921da177e4SLinus Torvalds data = (struct nfsctl_fsparm*)buf; 3931da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 3941da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 3951da177e4SLinus Torvalds goto out; 3961da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 3971da177e4SLinus Torvalds if (data->gd_maxlen > NFS3_FHSIZE) 3981da177e4SLinus Torvalds data->gd_maxlen = NFS3_FHSIZE; 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds res = (struct knfsd_fh*)buf; 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds exp_readlock(); 403f15364bdSAurélien Charbon 404f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 405f15364bdSAurélien Charbon 406f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 407f15364bdSAurélien Charbon if (!clp) 4081da177e4SLinus Torvalds err = -EPERM; 4091da177e4SLinus Torvalds else { 4101da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); 4111da177e4SLinus Torvalds auth_domain_put(clp); 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds exp_readunlock(); 4141da177e4SLinus Torvalds if (err == 0) 41512127498SAndrew Morton err = res->fh_size + offsetof(struct knfsd_fh, fh_base); 4161da177e4SLinus Torvalds out: 4171da177e4SLinus Torvalds return err; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 420262a0982SChuck Lever /** 421262a0982SChuck Lever * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) 422262a0982SChuck Lever * 423262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 424262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 425262a0982SChuck Lever * 426262a0982SChuck Lever * Input: 427262a0982SChuck Lever * buf: struct nfsctl_fdparm 428262a0982SChuck Lever * gd_addr: socket address of client 429262a0982SChuck Lever * gd_path: '\0'-terminated C string 430262a0982SChuck Lever * containing pathname of 431262a0982SChuck Lever * directory in local file system 432262a0982SChuck Lever * gd_version: fdparm structure version 433262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fdparm 434262a0982SChuck Lever * Output: 435262a0982SChuck Lever * On success: passed-in buffer filled with nfsctl_res 436262a0982SChuck Lever * (a fixed-length raw NFS file handle); 437262a0982SChuck Lever * return code is the size in bytes of the file handle 438262a0982SChuck Lever * On error: return code is negative errno value 439262a0982SChuck Lever * 440262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 441262a0982SChuck Lever * is the same size as a struct sockaddr_in. 442262a0982SChuck Lever */ 4431da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size) 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds struct nfsctl_fdparm *data; 4461da177e4SLinus Torvalds struct sockaddr_in *sin; 4471da177e4SLinus Torvalds struct auth_domain *clp; 4481da177e4SLinus Torvalds int err = 0; 4491da177e4SLinus Torvalds struct knfsd_fh fh; 4501da177e4SLinus Torvalds char *res; 451f15364bdSAurélien Charbon struct in6_addr in6; 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds if (size < sizeof(*data)) 4541da177e4SLinus Torvalds return -EINVAL; 4551da177e4SLinus Torvalds data = (struct nfsctl_fdparm*)buf; 4561da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 4571da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 4581da177e4SLinus Torvalds goto out; 4591da177e4SLinus Torvalds err = -EINVAL; 4601da177e4SLinus Torvalds if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) 4611da177e4SLinus Torvalds goto out; 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds res = buf; 4641da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 4651da177e4SLinus Torvalds exp_readlock(); 466f15364bdSAurélien Charbon 467f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 468f15364bdSAurélien Charbon 469f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 470f15364bdSAurélien Charbon if (!clp) 4711da177e4SLinus Torvalds err = -EPERM; 4721da177e4SLinus Torvalds else { 4731da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); 4741da177e4SLinus Torvalds auth_domain_put(clp); 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds exp_readunlock(); 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds if (err == 0) { 4791da177e4SLinus Torvalds memset(res,0, NFS_FHSIZE); 4801da177e4SLinus Torvalds memcpy(res, &fh.fh_base, fh.fh_size); 4811da177e4SLinus Torvalds err = NFS_FHSIZE; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds out: 4841da177e4SLinus Torvalds return err; 4851da177e4SLinus Torvalds } 4861da177e4SLinus Torvalds 487262a0982SChuck Lever /** 488262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 489262a0982SChuck Lever * 490262a0982SChuck Lever * Experimental. 491262a0982SChuck Lever * 492262a0982SChuck Lever * Input: 493262a0982SChuck Lever * buf: '\n'-terminated C string containing a 494262a0982SChuck Lever * presentation format IPv4 address 495262a0982SChuck Lever * size: length of C string in @buf 496262a0982SChuck Lever * Output: 497262a0982SChuck Lever * On success: returns zero if all specified locks were released; 498262a0982SChuck Lever * returns one if one or more locks were not released 499262a0982SChuck Lever * On error: return code is negative errno value 500262a0982SChuck Lever * 501262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in 502262a0982SChuck Lever */ 503b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 5044373ea84SWendy Cheng { 505367c8c7bSChuck Lever struct sockaddr_in sin = { 506367c8c7bSChuck Lever .sin_family = AF_INET, 507367c8c7bSChuck Lever }; 5084373ea84SWendy Cheng int b1, b2, b3, b4; 509367c8c7bSChuck Lever char c; 510367c8c7bSChuck Lever char *fo_path; 5114373ea84SWendy Cheng 5124373ea84SWendy Cheng /* sanity check */ 5134373ea84SWendy Cheng if (size == 0) 5144373ea84SWendy Cheng return -EINVAL; 5154373ea84SWendy Cheng 5164373ea84SWendy Cheng if (buf[size-1] != '\n') 5174373ea84SWendy Cheng return -EINVAL; 5184373ea84SWendy Cheng 5194373ea84SWendy Cheng fo_path = buf; 5204373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 5214373ea84SWendy Cheng return -EINVAL; 5224373ea84SWendy Cheng 5234373ea84SWendy Cheng /* get ipv4 address */ 524be859405SHarvey Harrison if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) 5254373ea84SWendy Cheng return -EINVAL; 526367c8c7bSChuck Lever if (b1 > 255 || b2 > 255 || b3 > 255 || b4 > 255) 527367c8c7bSChuck Lever return -EINVAL; 528367c8c7bSChuck Lever sin.sin_addr.s_addr = htonl((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); 5294373ea84SWendy Cheng 530367c8c7bSChuck Lever return nlmsvc_unlock_all_by_ip((struct sockaddr *)&sin); 5314373ea84SWendy Cheng } 5324373ea84SWendy Cheng 533262a0982SChuck Lever /** 534262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 535262a0982SChuck Lever * 536262a0982SChuck Lever * Experimental. 537262a0982SChuck Lever * 538262a0982SChuck Lever * Input: 539262a0982SChuck Lever * buf: '\n'-terminated C string containing the 540262a0982SChuck Lever * absolute pathname of a local file system 541262a0982SChuck Lever * size: length of C string in @buf 542262a0982SChuck Lever * Output: 543262a0982SChuck Lever * On success: returns zero if all specified locks were released; 544262a0982SChuck Lever * returns one if one or more locks were not released 545262a0982SChuck Lever * On error: return code is negative errno value 546262a0982SChuck Lever */ 547b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 54817efa372SWendy Cheng { 549a63bb996SAl Viro struct path path; 55017efa372SWendy Cheng char *fo_path; 55117efa372SWendy Cheng int error; 55217efa372SWendy Cheng 55317efa372SWendy Cheng /* sanity check */ 55417efa372SWendy Cheng if (size == 0) 55517efa372SWendy Cheng return -EINVAL; 55617efa372SWendy Cheng 55717efa372SWendy Cheng if (buf[size-1] != '\n') 55817efa372SWendy Cheng return -EINVAL; 55917efa372SWendy Cheng 56017efa372SWendy Cheng fo_path = buf; 56117efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 56217efa372SWendy Cheng return -EINVAL; 56317efa372SWendy Cheng 564a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 56517efa372SWendy Cheng if (error) 56617efa372SWendy Cheng return error; 56717efa372SWendy Cheng 568262a0982SChuck Lever /* 569262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 570262a0982SChuck Lever * releasing locks on the wrong file system. 571262a0982SChuck Lever * 572262a0982SChuck Lever * For example: 573262a0982SChuck Lever * 1. Does the path refer to a directory? 574262a0982SChuck Lever * 2. Is that directory a mount point, or 575262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 576262a0982SChuck Lever */ 577a63bb996SAl Viro error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); 57817efa372SWendy Cheng 579a63bb996SAl Viro path_put(&path); 58017efa372SWendy Cheng return error; 58117efa372SWendy Cheng } 58217efa372SWendy Cheng 583262a0982SChuck Lever /** 584262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 585262a0982SChuck Lever * 586262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 587262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 588262a0982SChuck Lever * contain escape sequences. 589262a0982SChuck Lever * 590262a0982SChuck Lever * Input: 591262a0982SChuck Lever * buf: 592262a0982SChuck Lever * domain: client domain name 593262a0982SChuck Lever * path: export pathname 594262a0982SChuck Lever * maxsize: numeric maximum size of 595262a0982SChuck Lever * @buf 596262a0982SChuck Lever * size: length of C string in @buf 597262a0982SChuck Lever * Output: 598262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 599262a0982SChuck Lever * string containing a ASCII hex text version 600262a0982SChuck Lever * of the NFS file handle; 601262a0982SChuck Lever * return code is the size in bytes of the string 602262a0982SChuck Lever * On error: return code is negative errno value 603262a0982SChuck Lever */ 6041da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 6051da177e4SLinus Torvalds { 6061da177e4SLinus Torvalds char *dname, *path; 607246d95baSAndrew Morton int uninitialized_var(maxsize); 6081da177e4SLinus Torvalds char *mesg = buf; 6091da177e4SLinus Torvalds int len; 6101da177e4SLinus Torvalds struct auth_domain *dom; 6111da177e4SLinus Torvalds struct knfsd_fh fh; 6121da177e4SLinus Torvalds 61387d26ea7SJ. Bruce Fields if (size == 0) 61487d26ea7SJ. Bruce Fields return -EINVAL; 61587d26ea7SJ. Bruce Fields 6161da177e4SLinus Torvalds if (buf[size-1] != '\n') 6171da177e4SLinus Torvalds return -EINVAL; 6181da177e4SLinus Torvalds buf[size-1] = 0; 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds dname = mesg; 6211da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 62254224f04SChuck Lever if (len <= 0) 62354224f04SChuck Lever return -EINVAL; 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds path = dname+len+1; 6261da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 62754224f04SChuck Lever if (len <= 0) 62854224f04SChuck Lever return -EINVAL; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 6311da177e4SLinus Torvalds if (len) 6321da177e4SLinus Torvalds return len; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 6351da177e4SLinus Torvalds return -EINVAL; 6361da177e4SLinus Torvalds if (maxsize > NFS3_FHSIZE) 6371da177e4SLinus Torvalds maxsize = NFS3_FHSIZE; 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 6401da177e4SLinus Torvalds return -EINVAL; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 6431da177e4SLinus Torvalds dom = unix_domain_find(dname); 6441da177e4SLinus Torvalds if (!dom) 6451da177e4SLinus Torvalds return -ENOMEM; 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds len = exp_rootfh(dom, path, &fh, maxsize); 6481da177e4SLinus Torvalds auth_domain_put(dom); 6491da177e4SLinus Torvalds if (len) 6501da177e4SLinus Torvalds return len; 6511da177e4SLinus Torvalds 65254224f04SChuck Lever mesg = buf; 65354224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 6541da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 6551da177e4SLinus Torvalds mesg[-1] = '\n'; 6561da177e4SLinus Torvalds return mesg - buf; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 659262a0982SChuck Lever /** 660262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 661262a0982SChuck Lever * 662262a0982SChuck Lever * Input: 663262a0982SChuck Lever * buf: ignored 664262a0982SChuck Lever * size: zero 665262a0982SChuck Lever * Output: 666262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 667262a0982SChuck Lever * string numeric value representing the number of 668262a0982SChuck Lever * running NFSD threads; 669262a0982SChuck Lever * return code is the size in bytes of the string 670262a0982SChuck Lever * On error: return code is zero 671262a0982SChuck Lever * 672262a0982SChuck Lever * OR 673262a0982SChuck Lever * 674262a0982SChuck Lever * Input: 675262a0982SChuck Lever * buf: C string containing an unsigned 676262a0982SChuck Lever * integer value representing the 677262a0982SChuck Lever * number of NFSD threads to start 678262a0982SChuck Lever * size: non-zero length of C string in @buf 679262a0982SChuck Lever * Output: 680262a0982SChuck Lever * On success: NFS service is started; 681262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 682262a0982SChuck Lever * string numeric value representing the number of 683262a0982SChuck Lever * running NFSD threads; 684262a0982SChuck Lever * return code is the size in bytes of the string 685262a0982SChuck Lever * On error: return code is zero or a negative errno value 686262a0982SChuck Lever */ 6871da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 6881da177e4SLinus Torvalds { 6891da177e4SLinus Torvalds char *mesg = buf; 6901da177e4SLinus Torvalds int rv; 6911da177e4SLinus Torvalds if (size > 0) { 6921da177e4SLinus Torvalds int newthreads; 6931da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 6941da177e4SLinus Torvalds if (rv) 6951da177e4SLinus Torvalds return rv; 6961da177e4SLinus Torvalds if (newthreads < 0) 6971da177e4SLinus Torvalds return -EINVAL; 6989e074856SChuck Lever rv = nfsd_svc(NFS_PORT, newthreads); 69982e12fe9SNeilBrown if (rv < 0) 7001da177e4SLinus Torvalds return rv; 70182e12fe9SNeilBrown } else 70282e12fe9SNeilBrown rv = nfsd_nrthreads(); 703e06b6405SChuck Lever 70482e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 7051da177e4SLinus Torvalds } 7061da177e4SLinus Torvalds 707262a0982SChuck Lever /** 708262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 709262a0982SChuck Lever * 710262a0982SChuck Lever * Input: 711262a0982SChuck Lever * buf: ignored 712262a0982SChuck Lever * size: zero 713262a0982SChuck Lever * 714262a0982SChuck Lever * OR 715262a0982SChuck Lever * 716262a0982SChuck Lever * Input: 717262a0982SChuck Lever * buf: C string containing whitespace- 718262a0982SChuck Lever * separated unsigned integer values 719262a0982SChuck Lever * representing the number of NFSD 720262a0982SChuck Lever * threads to start in each pool 721262a0982SChuck Lever * size: non-zero length of C string in @buf 722262a0982SChuck Lever * Output: 723262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 724262a0982SChuck Lever * string containing integer values representing the 725262a0982SChuck Lever * number of NFSD threads in each pool; 726262a0982SChuck Lever * return code is the size in bytes of the string 727262a0982SChuck Lever * On error: return code is zero or a negative errno value 728262a0982SChuck Lever */ 729eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 730eed2965aSGreg Banks { 731eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 732eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 733eed2965aSGreg Banks */ 734eed2965aSGreg Banks char *mesg = buf; 735eed2965aSGreg Banks int i; 736eed2965aSGreg Banks int rv; 737eed2965aSGreg Banks int len; 738bedbdd8bSNeil Brown int npools; 739eed2965aSGreg Banks int *nthreads; 740eed2965aSGreg Banks 741bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 742bedbdd8bSNeil Brown npools = nfsd_nrpools(); 743eed2965aSGreg Banks if (npools == 0) { 744eed2965aSGreg Banks /* 745eed2965aSGreg Banks * NFS is shut down. The admin can start it by 746eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 747eed2965aSGreg Banks * file, sorry. Report zero threads. 748eed2965aSGreg Banks */ 749bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 750eed2965aSGreg Banks strcpy(buf, "0\n"); 751eed2965aSGreg Banks return strlen(buf); 752eed2965aSGreg Banks } 753eed2965aSGreg Banks 754eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 755bedbdd8bSNeil Brown rv = -ENOMEM; 756eed2965aSGreg Banks if (nthreads == NULL) 757bedbdd8bSNeil Brown goto out_free; 758eed2965aSGreg Banks 759eed2965aSGreg Banks if (size > 0) { 760eed2965aSGreg Banks for (i = 0; i < npools; i++) { 761eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 762eed2965aSGreg Banks if (rv == -ENOENT) 763eed2965aSGreg Banks break; /* fewer numbers than pools */ 764eed2965aSGreg Banks if (rv) 765eed2965aSGreg Banks goto out_free; /* syntax error */ 766eed2965aSGreg Banks rv = -EINVAL; 767eed2965aSGreg Banks if (nthreads[i] < 0) 768eed2965aSGreg Banks goto out_free; 769eed2965aSGreg Banks } 770eed2965aSGreg Banks rv = nfsd_set_nrthreads(i, nthreads); 771eed2965aSGreg Banks if (rv) 772eed2965aSGreg Banks goto out_free; 773eed2965aSGreg Banks } 774eed2965aSGreg Banks 775eed2965aSGreg Banks rv = nfsd_get_nrthreads(npools, nthreads); 776eed2965aSGreg Banks if (rv) 777eed2965aSGreg Banks goto out_free; 778eed2965aSGreg Banks 779eed2965aSGreg Banks mesg = buf; 780eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 781eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 782eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 783eed2965aSGreg Banks len = strlen(mesg); 784eed2965aSGreg Banks size -= len; 785eed2965aSGreg Banks mesg += len; 786eed2965aSGreg Banks } 787*413d63d7SJ. Bruce Fields rv = mesg - buf; 788eed2965aSGreg Banks out_free: 789eed2965aSGreg Banks kfree(nthreads); 790bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 791eed2965aSGreg Banks return rv; 792eed2965aSGreg Banks } 793eed2965aSGreg Banks 7943dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 79570c3b76cSNeilBrown { 79670c3b76cSNeilBrown char *mesg = buf; 7978daf220aSBenny Halevy char *vers, *minorp, sign; 798261758b5SChuck Lever int len, num, remaining; 7998daf220aSBenny Halevy unsigned minor; 80070c3b76cSNeilBrown ssize_t tlen = 0; 80170c3b76cSNeilBrown char *sep; 80270c3b76cSNeilBrown 80370c3b76cSNeilBrown if (size>0) { 80470c3b76cSNeilBrown if (nfsd_serv) 8056658d3a7SNeilBrown /* Cannot change versions without updating 8066658d3a7SNeilBrown * nfsd_serv->sv_xdrsize, and reallocing 8076658d3a7SNeilBrown * rq_argp and rq_resp 8086658d3a7SNeilBrown */ 80970c3b76cSNeilBrown return -EBUSY; 81070c3b76cSNeilBrown if (buf[size-1] != '\n') 81170c3b76cSNeilBrown return -EINVAL; 81270c3b76cSNeilBrown buf[size-1] = 0; 81370c3b76cSNeilBrown 81470c3b76cSNeilBrown vers = mesg; 81570c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 81670c3b76cSNeilBrown if (len <= 0) return -EINVAL; 81770c3b76cSNeilBrown do { 81870c3b76cSNeilBrown sign = *vers; 81970c3b76cSNeilBrown if (sign == '+' || sign == '-') 8208daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 82170c3b76cSNeilBrown else 8228daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 8238daf220aSBenny Halevy if (*minorp == '.') { 8248daf220aSBenny Halevy if (num < 4) 8258daf220aSBenny Halevy return -EINVAL; 8268daf220aSBenny Halevy minor = simple_strtoul(minorp+1, NULL, 0); 8278daf220aSBenny Halevy if (minor == 0) 8288daf220aSBenny Halevy return -EINVAL; 8298daf220aSBenny Halevy if (nfsd_minorversion(minor, sign == '-' ? 8308daf220aSBenny Halevy NFSD_CLEAR : NFSD_SET) < 0) 8318daf220aSBenny Halevy return -EINVAL; 8328daf220aSBenny Halevy goto next; 8338daf220aSBenny Halevy } 83470c3b76cSNeilBrown switch(num) { 83570c3b76cSNeilBrown case 2: 83670c3b76cSNeilBrown case 3: 83770c3b76cSNeilBrown case 4: 8386658d3a7SNeilBrown nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 83970c3b76cSNeilBrown break; 84070c3b76cSNeilBrown default: 84170c3b76cSNeilBrown return -EINVAL; 84270c3b76cSNeilBrown } 8438daf220aSBenny Halevy next: 84470c3b76cSNeilBrown vers += len + 1; 84570c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 84670c3b76cSNeilBrown /* If all get turned off, turn them back on, as 84770c3b76cSNeilBrown * having no versions is BAD 84870c3b76cSNeilBrown */ 8496658d3a7SNeilBrown nfsd_reset_versions(); 85070c3b76cSNeilBrown } 851261758b5SChuck Lever 85270c3b76cSNeilBrown /* Now write current state into reply buffer */ 85370c3b76cSNeilBrown len = 0; 85470c3b76cSNeilBrown sep = ""; 855261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 85670c3b76cSNeilBrown for (num=2 ; num <= 4 ; num++) 8576658d3a7SNeilBrown if (nfsd_vers(num, NFSD_AVAIL)) { 858261758b5SChuck Lever len = snprintf(buf, remaining, "%s%c%d", sep, 8596658d3a7SNeilBrown nfsd_vers(num, NFSD_TEST)?'+':'-', 86070c3b76cSNeilBrown num); 86170c3b76cSNeilBrown sep = " "; 862261758b5SChuck Lever 863261758b5SChuck Lever if (len > remaining) 864261758b5SChuck Lever break; 865261758b5SChuck Lever remaining -= len; 866261758b5SChuck Lever buf += len; 867261758b5SChuck Lever tlen += len; 86870c3b76cSNeilBrown } 8698daf220aSBenny Halevy if (nfsd_vers(4, NFSD_AVAIL)) 870261758b5SChuck Lever for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 871261758b5SChuck Lever minor++) { 872261758b5SChuck Lever len = snprintf(buf, remaining, " %c4.%u", 8738daf220aSBenny Halevy (nfsd_vers(4, NFSD_TEST) && 8748daf220aSBenny Halevy nfsd_minorversion(minor, NFSD_TEST)) ? 8758daf220aSBenny Halevy '+' : '-', 8768daf220aSBenny Halevy minor); 877261758b5SChuck Lever 878261758b5SChuck Lever if (len > remaining) 879261758b5SChuck Lever break; 880261758b5SChuck Lever remaining -= len; 881261758b5SChuck Lever buf += len; 882261758b5SChuck Lever tlen += len; 883261758b5SChuck Lever } 884261758b5SChuck Lever 885261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 886261758b5SChuck Lever if (len > remaining) 887261758b5SChuck Lever return -EINVAL; 888261758b5SChuck Lever return tlen + len; 88970c3b76cSNeilBrown } 89070c3b76cSNeilBrown 891262a0982SChuck Lever /** 892262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 893262a0982SChuck Lever * 894262a0982SChuck Lever * Input: 895262a0982SChuck Lever * buf: ignored 896262a0982SChuck Lever * size: zero 897262a0982SChuck Lever * Output: 898262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 899262a0982SChuck Lever * string containing positive or negative integer 900262a0982SChuck Lever * values representing the current status of each 901262a0982SChuck Lever * protocol version; 902262a0982SChuck Lever * return code is the size in bytes of the string 903262a0982SChuck Lever * On error: return code is zero or a negative errno value 904262a0982SChuck Lever * 905262a0982SChuck Lever * OR 906262a0982SChuck Lever * 907262a0982SChuck Lever * Input: 908262a0982SChuck Lever * buf: C string containing whitespace- 909262a0982SChuck Lever * separated positive or negative 910262a0982SChuck Lever * integer values representing NFS 911262a0982SChuck Lever * protocol versions to enable ("+n") 912262a0982SChuck Lever * or disable ("-n") 913262a0982SChuck Lever * size: non-zero length of C string in @buf 914262a0982SChuck Lever * Output: 915262a0982SChuck Lever * On success: status of zero or more protocol versions has 916262a0982SChuck Lever * been updated; passed-in buffer filled with 917262a0982SChuck Lever * '\n'-terminated C string containing positive 918262a0982SChuck Lever * or negative integer values representing the 919262a0982SChuck Lever * current status of each protocol version; 920262a0982SChuck Lever * return code is the size in bytes of the string 921262a0982SChuck Lever * On error: return code is zero or a negative errno value 922262a0982SChuck Lever */ 9233dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 9243dd98a3bSJeff Layton { 9253dd98a3bSJeff Layton ssize_t rv; 9263dd98a3bSJeff Layton 9273dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 9283dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 9293dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 9303dd98a3bSJeff Layton return rv; 9313dd98a3bSJeff Layton } 9323dd98a3bSJeff Layton 9334cd5dc75SChuck Lever /* 9340a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 9350a5372d8SChuck Lever * transports. 9360a5372d8SChuck Lever */ 9370a5372d8SChuck Lever static ssize_t __write_ports_names(char *buf) 9380a5372d8SChuck Lever { 9390a5372d8SChuck Lever if (nfsd_serv == NULL) 9400a5372d8SChuck Lever return 0; 941335c54bdSChuck Lever return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 9420a5372d8SChuck Lever } 9430a5372d8SChuck Lever 9440a5372d8SChuck Lever /* 9450b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 9460b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 9470b7c2f6fSChuck Lever * nfsd listener. 9480b7c2f6fSChuck Lever */ 9490b7c2f6fSChuck Lever static ssize_t __write_ports_addfd(char *buf) 9500b7c2f6fSChuck Lever { 9510b7c2f6fSChuck Lever char *mesg = buf; 9520b7c2f6fSChuck Lever int fd, err; 9530b7c2f6fSChuck Lever 9540b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 9550b7c2f6fSChuck Lever if (err != 0 || fd < 0) 9560b7c2f6fSChuck Lever return -EINVAL; 9570b7c2f6fSChuck Lever 9580b7c2f6fSChuck Lever err = nfsd_create_serv(); 9590b7c2f6fSChuck Lever if (err != 0) 9600b7c2f6fSChuck Lever return err; 9610b7c2f6fSChuck Lever 9620b7c2f6fSChuck Lever err = lockd_up(); 963ea068badSChuck Lever if (err != 0) 964ea068badSChuck Lever goto out; 9650b7c2f6fSChuck Lever 966bfba9ab4SChuck Lever err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 967ea068badSChuck Lever if (err < 0) 968ea068badSChuck Lever lockd_down(); 969ea068badSChuck Lever 970ea068badSChuck Lever out: 9710b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 9720b7c2f6fSChuck Lever nfsd_serv->sv_nrthreads--; 973ea068badSChuck Lever return err; 9740b7c2f6fSChuck Lever } 9750b7c2f6fSChuck Lever 9760b7c2f6fSChuck Lever /* 97782d56591SChuck Lever * A '-' followed by the 'name' of a socket means we close the socket. 97882d56591SChuck Lever */ 97982d56591SChuck Lever static ssize_t __write_ports_delfd(char *buf) 98082d56591SChuck Lever { 98182d56591SChuck Lever char *toclose; 98282d56591SChuck Lever int len = 0; 98382d56591SChuck Lever 98482d56591SChuck Lever toclose = kstrdup(buf + 1, GFP_KERNEL); 98582d56591SChuck Lever if (toclose == NULL) 98682d56591SChuck Lever return -ENOMEM; 98782d56591SChuck Lever 98882d56591SChuck Lever if (nfsd_serv != NULL) 9898435d34dSChuck Lever len = svc_sock_names(nfsd_serv, buf, 9908435d34dSChuck Lever SIMPLE_TRANSACTION_LIMIT, toclose); 99182d56591SChuck Lever if (len >= 0) 99282d56591SChuck Lever lockd_down(); 99382d56591SChuck Lever 99482d56591SChuck Lever kfree(toclose); 99582d56591SChuck Lever return len; 99682d56591SChuck Lever } 99782d56591SChuck Lever 99882d56591SChuck Lever /* 9994eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 10004eb68c26SChuck Lever * a port number. 10014eb68c26SChuck Lever */ 10024eb68c26SChuck Lever static ssize_t __write_ports_addxprt(char *buf) 10034eb68c26SChuck Lever { 10044eb68c26SChuck Lever char transport[16]; 10054eb68c26SChuck Lever int port, err; 10064eb68c26SChuck Lever 10074eb68c26SChuck Lever if (sscanf(buf, "%15s %4u", transport, &port) != 2) 10084eb68c26SChuck Lever return -EINVAL; 10094eb68c26SChuck Lever 10104eb68c26SChuck Lever if (port < 1 || port > USHORT_MAX) 10114eb68c26SChuck Lever return -EINVAL; 10124eb68c26SChuck Lever 10134eb68c26SChuck Lever err = nfsd_create_serv(); 10144eb68c26SChuck Lever if (err != 0) 10154eb68c26SChuck Lever return err; 10164eb68c26SChuck Lever 10174eb68c26SChuck Lever err = svc_create_xprt(nfsd_serv, transport, 10184eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 10194eb68c26SChuck Lever if (err < 0) { 10204eb68c26SChuck Lever /* Give a reasonable perror msg for bad transport string */ 10214eb68c26SChuck Lever if (err == -ENOENT) 10224eb68c26SChuck Lever err = -EPROTONOSUPPORT; 10234eb68c26SChuck Lever return err; 10244eb68c26SChuck Lever } 10254eb68c26SChuck Lever return 0; 10264eb68c26SChuck Lever } 10274eb68c26SChuck Lever 10284eb68c26SChuck Lever /* 10294cd5dc75SChuck Lever * A transport listener is removed by writing a "-", it's transport 10304cd5dc75SChuck Lever * name, and it's port number. 10314cd5dc75SChuck Lever */ 10324cd5dc75SChuck Lever static ssize_t __write_ports_delxprt(char *buf) 10334cd5dc75SChuck Lever { 10344cd5dc75SChuck Lever struct svc_xprt *xprt; 10354cd5dc75SChuck Lever char transport[16]; 10364cd5dc75SChuck Lever int port; 10374cd5dc75SChuck Lever 10384cd5dc75SChuck Lever if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) 10394cd5dc75SChuck Lever return -EINVAL; 10404cd5dc75SChuck Lever 10414cd5dc75SChuck Lever if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) 10424cd5dc75SChuck Lever return -EINVAL; 10434cd5dc75SChuck Lever 10444cd5dc75SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); 10454cd5dc75SChuck Lever if (xprt == NULL) 10464cd5dc75SChuck Lever return -ENOTCONN; 10474cd5dc75SChuck Lever 10484cd5dc75SChuck Lever svc_close_xprt(xprt); 10494cd5dc75SChuck Lever svc_xprt_put(xprt); 10504cd5dc75SChuck Lever return 0; 10514cd5dc75SChuck Lever } 10524cd5dc75SChuck Lever 1053bedbdd8bSNeil Brown static ssize_t __write_ports(struct file *file, char *buf, size_t size) 105480212d59SNeilBrown { 10550a5372d8SChuck Lever if (size == 0) 10560a5372d8SChuck Lever return __write_ports_names(buf); 10570b7c2f6fSChuck Lever 10580b7c2f6fSChuck Lever if (isdigit(buf[0])) 10590b7c2f6fSChuck Lever return __write_ports_addfd(buf); 106082d56591SChuck Lever 106182d56591SChuck Lever if (buf[0] == '-' && isdigit(buf[1])) 106282d56591SChuck Lever return __write_ports_delfd(buf); 10634eb68c26SChuck Lever 10644eb68c26SChuck Lever if (isalpha(buf[0])) 10654eb68c26SChuck Lever return __write_ports_addxprt(buf); 10664cd5dc75SChuck Lever 10674cd5dc75SChuck Lever if (buf[0] == '-' && isalpha(buf[1])) 10684cd5dc75SChuck Lever return __write_ports_delxprt(buf); 10694cd5dc75SChuck Lever 1070b41b66d6SNeilBrown return -EINVAL; 1071b41b66d6SNeilBrown } 107280212d59SNeilBrown 1073262a0982SChuck Lever /** 1074262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 1075262a0982SChuck Lever * 1076262a0982SChuck Lever * Input: 1077262a0982SChuck Lever * buf: ignored 1078262a0982SChuck Lever * size: zero 1079262a0982SChuck Lever * Output: 1080262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 1081262a0982SChuck Lever * string containing a whitespace-separated list of 1082262a0982SChuck Lever * named NFSD listeners; 1083262a0982SChuck Lever * return code is the size in bytes of the string 1084262a0982SChuck Lever * On error: return code is zero or a negative errno value 1085262a0982SChuck Lever * 1086262a0982SChuck Lever * OR 1087262a0982SChuck Lever * 1088262a0982SChuck Lever * Input: 1089262a0982SChuck Lever * buf: C string containing an unsigned 1090262a0982SChuck Lever * integer value representing a bound 1091262a0982SChuck Lever * but unconnected socket that is to be 1092c71206a7SChuck Lever * used as an NFSD listener; listen(3) 1093c71206a7SChuck Lever * must be called for a SOCK_STREAM 1094c71206a7SChuck Lever * socket, otherwise it is ignored 1095262a0982SChuck Lever * size: non-zero length of C string in @buf 1096262a0982SChuck Lever * Output: 1097262a0982SChuck Lever * On success: NFS service is started; 1098262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1099262a0982SChuck Lever * string containing a unique alphanumeric name of 1100262a0982SChuck Lever * the listener; 1101262a0982SChuck Lever * return code is the size in bytes of the string 1102262a0982SChuck Lever * On error: return code is a negative errno value 1103262a0982SChuck Lever * 1104262a0982SChuck Lever * OR 1105262a0982SChuck Lever * 1106262a0982SChuck Lever * Input: 1107262a0982SChuck Lever * buf: C string containing a "-" followed 1108262a0982SChuck Lever * by an integer value representing a 1109262a0982SChuck Lever * previously passed in socket file 1110262a0982SChuck Lever * descriptor 1111262a0982SChuck Lever * size: non-zero length of C string in @buf 1112262a0982SChuck Lever * Output: 1113262a0982SChuck Lever * On success: NFS service no longer listens on that socket; 1114262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1115262a0982SChuck Lever * string containing a unique name of the listener; 1116262a0982SChuck Lever * return code is the size in bytes of the string 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 transport 1123262a0982SChuck Lever * name and an unsigned integer value 1124262a0982SChuck Lever * representing the port to listen on, 1125262a0982SChuck Lever * 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 is started 1129262a0982SChuck Lever * On error: return code is a negative errno value 1130262a0982SChuck Lever * 1131262a0982SChuck Lever * OR 1132262a0982SChuck Lever * 1133262a0982SChuck Lever * Input: 1134262a0982SChuck Lever * buf: C string containing a "-" followed 1135262a0982SChuck Lever * by a transport name and an unsigned 1136262a0982SChuck Lever * integer value representing the port 1137262a0982SChuck Lever * to listen on, separated by whitespace 1138262a0982SChuck Lever * size: non-zero length of C string in @buf 1139262a0982SChuck Lever * Output: 1140262a0982SChuck Lever * On success: returns zero; NFS service no longer listens 1141262a0982SChuck Lever * on that transport 1142262a0982SChuck Lever * On error: return code is a negative errno value 1143262a0982SChuck Lever */ 1144bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 1145bedbdd8bSNeil Brown { 1146bedbdd8bSNeil Brown ssize_t rv; 11473dd98a3bSJeff Layton 1148bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1149bedbdd8bSNeil Brown rv = __write_ports(file, buf, size); 1150bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1151bedbdd8bSNeil Brown return rv; 1152bedbdd8bSNeil Brown } 1153bedbdd8bSNeil Brown 1154bedbdd8bSNeil Brown 1155596bbe53SNeilBrown int nfsd_max_blksize; 1156596bbe53SNeilBrown 1157262a0982SChuck Lever /** 1158262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 1159262a0982SChuck Lever * 1160262a0982SChuck Lever * Input: 1161262a0982SChuck Lever * buf: ignored 1162262a0982SChuck Lever * size: zero 1163262a0982SChuck Lever * 1164262a0982SChuck Lever * OR 1165262a0982SChuck Lever * 1166262a0982SChuck Lever * Input: 1167262a0982SChuck Lever * buf: C string containing an unsigned 1168262a0982SChuck Lever * integer value representing the new 1169262a0982SChuck Lever * NFS blksize 1170262a0982SChuck Lever * size: non-zero length of C string in @buf 1171262a0982SChuck Lever * Output: 1172262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1173262a0982SChuck Lever * containing numeric value of the current NFS blksize 1174262a0982SChuck Lever * setting; 1175262a0982SChuck Lever * return code is the size in bytes of the string 1176262a0982SChuck Lever * On error: return code is zero or a negative errno value 1177262a0982SChuck Lever */ 1178596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 1179596bbe53SNeilBrown { 1180596bbe53SNeilBrown char *mesg = buf; 1181596bbe53SNeilBrown if (size > 0) { 1182596bbe53SNeilBrown int bsize; 1183596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 1184596bbe53SNeilBrown if (rv) 1185596bbe53SNeilBrown return rv; 1186596bbe53SNeilBrown /* force bsize into allowed range and 1187596bbe53SNeilBrown * required alignment. 1188596bbe53SNeilBrown */ 1189596bbe53SNeilBrown if (bsize < 1024) 1190596bbe53SNeilBrown bsize = 1024; 1191596bbe53SNeilBrown if (bsize > NFSSVC_MAXBLKSIZE) 1192596bbe53SNeilBrown bsize = NFSSVC_MAXBLKSIZE; 1193596bbe53SNeilBrown bsize &= ~(1024-1); 1194bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1195596bbe53SNeilBrown if (nfsd_serv && nfsd_serv->sv_nrthreads) { 1196bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1197596bbe53SNeilBrown return -EBUSY; 1198596bbe53SNeilBrown } 1199596bbe53SNeilBrown nfsd_max_blksize = bsize; 1200bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1201596bbe53SNeilBrown } 1202e06b6405SChuck Lever 1203e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 1204e06b6405SChuck Lever nfsd_max_blksize); 1205596bbe53SNeilBrown } 1206596bbe53SNeilBrown 120770c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 12081da177e4SLinus Torvalds extern time_t nfs4_leasetime(void); 12091da177e4SLinus Torvalds 12103dd98a3bSJeff Layton static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) 12111da177e4SLinus Torvalds { 12121da177e4SLinus Torvalds /* if size > 10 seconds, call 12131da177e4SLinus Torvalds * nfs4_reset_lease() then write out the new lease (seconds) as reply 12141da177e4SLinus Torvalds */ 12151da177e4SLinus Torvalds char *mesg = buf; 12163dd98a3bSJeff Layton int rv, lease; 12171da177e4SLinus Torvalds 12181da177e4SLinus Torvalds if (size > 0) { 12193dd98a3bSJeff Layton if (nfsd_serv) 12203dd98a3bSJeff Layton return -EBUSY; 12211da177e4SLinus Torvalds rv = get_int(&mesg, &lease); 12221da177e4SLinus Torvalds if (rv) 12231da177e4SLinus Torvalds return rv; 12241da177e4SLinus Torvalds if (lease < 10 || lease > 3600) 12251da177e4SLinus Torvalds return -EINVAL; 12261da177e4SLinus Torvalds nfs4_reset_lease(lease); 12271da177e4SLinus Torvalds } 1228e06b6405SChuck Lever 1229e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", 1230e06b6405SChuck Lever nfs4_lease_time()); 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds 1233262a0982SChuck Lever /** 1234262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 1235262a0982SChuck Lever * 1236262a0982SChuck Lever * Input: 1237262a0982SChuck Lever * buf: ignored 1238262a0982SChuck Lever * size: zero 1239262a0982SChuck Lever * 1240262a0982SChuck Lever * OR 1241262a0982SChuck Lever * 1242262a0982SChuck Lever * Input: 1243262a0982SChuck Lever * buf: C string containing an unsigned 1244262a0982SChuck Lever * integer value representing the new 1245262a0982SChuck Lever * NFSv4 lease expiry time 1246262a0982SChuck Lever * size: non-zero length of C string in @buf 1247262a0982SChuck Lever * Output: 1248262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1249262a0982SChuck Lever * string containing unsigned integer value of the 1250262a0982SChuck Lever * current lease expiry time; 1251262a0982SChuck Lever * return code is the size in bytes of the string 1252262a0982SChuck Lever * On error: return code is zero or a negative errno value 1253262a0982SChuck Lever */ 12543dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 12553dd98a3bSJeff Layton { 12563dd98a3bSJeff Layton ssize_t rv; 12573dd98a3bSJeff Layton 12583dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 12593dd98a3bSJeff Layton rv = __write_leasetime(file, buf, size); 12603dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 12613dd98a3bSJeff Layton return rv; 12623dd98a3bSJeff Layton } 12633dd98a3bSJeff Layton 12643dd98a3bSJeff Layton extern char *nfs4_recoverydir(void); 12653dd98a3bSJeff Layton 12663dd98a3bSJeff Layton static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) 12670964a3d3SNeilBrown { 12680964a3d3SNeilBrown char *mesg = buf; 12690964a3d3SNeilBrown char *recdir; 12700964a3d3SNeilBrown int len, status; 12710964a3d3SNeilBrown 12723dd98a3bSJeff Layton if (size > 0) { 12733dd98a3bSJeff Layton if (nfsd_serv) 12743dd98a3bSJeff Layton return -EBUSY; 12753dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 12760964a3d3SNeilBrown return -EINVAL; 12770964a3d3SNeilBrown buf[size-1] = 0; 12780964a3d3SNeilBrown 12790964a3d3SNeilBrown recdir = mesg; 12800964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 12810964a3d3SNeilBrown if (len <= 0) 12820964a3d3SNeilBrown return -EINVAL; 12830964a3d3SNeilBrown 12840964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 12853dd98a3bSJeff Layton } 12863d72ab8fSChuck Lever 12873d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 12883d72ab8fSChuck Lever nfs4_recoverydir()); 12890964a3d3SNeilBrown } 12903dd98a3bSJeff Layton 1291262a0982SChuck Lever /** 1292262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1293262a0982SChuck Lever * 1294262a0982SChuck Lever * Input: 1295262a0982SChuck Lever * buf: ignored 1296262a0982SChuck Lever * size: zero 1297262a0982SChuck Lever * 1298262a0982SChuck Lever * OR 1299262a0982SChuck Lever * 1300262a0982SChuck Lever * Input: 1301262a0982SChuck Lever * buf: C string containing the pathname 1302262a0982SChuck Lever * of the directory on a local file 1303262a0982SChuck Lever * system containing permanent NFSv4 1304262a0982SChuck Lever * recovery data 1305262a0982SChuck Lever * size: non-zero length of C string in @buf 1306262a0982SChuck Lever * Output: 1307262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1308262a0982SChuck Lever * containing the current recovery pathname setting; 1309262a0982SChuck Lever * return code is the size in bytes of the string 1310262a0982SChuck Lever * On error: return code is zero or a negative errno value 1311262a0982SChuck Lever */ 13123dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 13133dd98a3bSJeff Layton { 13143dd98a3bSJeff Layton ssize_t rv; 13153dd98a3bSJeff Layton 13163dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 13173dd98a3bSJeff Layton rv = __write_recoverydir(file, buf, size); 13183dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 13193dd98a3bSJeff Layton return rv; 13203dd98a3bSJeff Layton } 13213dd98a3bSJeff Layton 132270c3b76cSNeilBrown #endif 13230964a3d3SNeilBrown 13241da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 13251da177e4SLinus Torvalds /* 13261da177e4SLinus Torvalds * populating the filesystem. 13271da177e4SLinus Torvalds */ 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 13301da177e4SLinus Torvalds { 13311da177e4SLinus Torvalds static struct tree_descr nfsd_files[] = { 13321da177e4SLinus Torvalds [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 13331da177e4SLinus Torvalds [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 13341da177e4SLinus Torvalds [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 13351da177e4SLinus Torvalds [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 13361da177e4SLinus Torvalds [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 13371da177e4SLinus Torvalds [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 13381da177e4SLinus Torvalds [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 13391da177e4SLinus Torvalds [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 13404373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13414373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 134217efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 134317efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13441da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13451da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1346eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 134703cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 134870c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 134980212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1350596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13511da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13521da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 13530964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 13541da177e4SLinus Torvalds #endif 13551da177e4SLinus Torvalds /* last one */ {""} 13561da177e4SLinus Torvalds }; 13571da177e4SLinus Torvalds return simple_fill_super(sb, 0x6e667364, nfsd_files); 13581da177e4SLinus Torvalds } 13591da177e4SLinus Torvalds 1360454e2398SDavid Howells static int nfsd_get_sb(struct file_system_type *fs_type, 1361454e2398SDavid Howells int flags, const char *dev_name, void *data, struct vfsmount *mnt) 13621da177e4SLinus Torvalds { 1363454e2398SDavid Howells return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); 13641da177e4SLinus Torvalds } 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 13671da177e4SLinus Torvalds .owner = THIS_MODULE, 13681da177e4SLinus Torvalds .name = "nfsd", 13691da177e4SLinus Torvalds .get_sb = nfsd_get_sb, 13701da177e4SLinus Torvalds .kill_sb = kill_litter_super, 13711da177e4SLinus Torvalds }; 13721da177e4SLinus Torvalds 1373e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1374e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1375e331f606SJ. Bruce Fields { 1376e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1377e331f606SJ. Bruce Fields 1378e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1379e331f606SJ. Bruce Fields if (!entry) 1380e331f606SJ. Bruce Fields return -ENOMEM; 13819ef2db26SDenis V. Lunev entry = proc_create("exports", 0, entry, &exports_operations); 1382e331f606SJ. Bruce Fields if (!entry) 1383e331f606SJ. Bruce Fields return -ENOMEM; 1384e331f606SJ. Bruce Fields return 0; 1385e331f606SJ. Bruce Fields } 1386e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1387e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1388e331f606SJ. Bruce Fields { 1389e331f606SJ. Bruce Fields return 0; 1390e331f606SJ. Bruce Fields } 1391e331f606SJ. Bruce Fields #endif 1392e331f606SJ. Bruce Fields 13931da177e4SLinus Torvalds static int __init init_nfsd(void) 13941da177e4SLinus Torvalds { 13951da177e4SLinus Torvalds int retval; 13961da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 13971da177e4SLinus Torvalds 1398e8ff2a84SJ. Bruce Fields retval = nfs4_state_init(); /* nfs4 locking state */ 1399e8ff2a84SJ. Bruce Fields if (retval) 1400e8ff2a84SJ. Bruce Fields return retval; 14011da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1402d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1403d5c3428bSJ. Bruce Fields if (retval) 1404d5c3428bSJ. Bruce Fields goto out_free_stat; 1405dbf847ecSJ. Bruce Fields retval = nfsd_export_init(); 1406dbf847ecSJ. Bruce Fields if (retval) 1407dbf847ecSJ. Bruce Fields goto out_free_cache; 14081da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1409dbf847ecSJ. Bruce Fields retval = nfsd_idmap_init(); 1410dbf847ecSJ. Bruce Fields if (retval) 1411dbf847ecSJ. Bruce Fields goto out_free_lockd; 1412e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1413e331f606SJ. Bruce Fields if (retval) 1414e331f606SJ. Bruce Fields goto out_free_idmap; 14151da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 141626808d3fSJ. Bruce Fields if (retval) 141726808d3fSJ. Bruce Fields goto out_free_all; 141826808d3fSJ. Bruce Fields return 0; 141926808d3fSJ. Bruce Fields out_free_all: 14201da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14211da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1422e331f606SJ. Bruce Fields out_free_idmap: 1423dbf847ecSJ. Bruce Fields nfsd_idmap_shutdown(); 1424dbf847ecSJ. Bruce Fields out_free_lockd: 14251da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1426e331f606SJ. Bruce Fields nfsd_export_shutdown(); 1427dbf847ecSJ. Bruce Fields out_free_cache: 1428e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1429d5c3428bSJ. Bruce Fields out_free_stat: 1430d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 143146b25895SJ. Bruce Fields nfsd4_free_slabs(); 14321da177e4SLinus Torvalds return retval; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds static void __exit exit_nfsd(void) 14361da177e4SLinus Torvalds { 14371da177e4SLinus Torvalds nfsd_export_shutdown(); 1438d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 14391da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14401da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 14411da177e4SLinus Torvalds nfsd_stat_shutdown(); 14421da177e4SLinus Torvalds nfsd_lockd_shutdown(); 14431da177e4SLinus Torvalds nfsd_idmap_shutdown(); 1444e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 14451da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 14461da177e4SLinus Torvalds } 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 14491da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 14501da177e4SLinus Torvalds module_init(init_nfsd) 14511da177e4SLinus Torvalds module_exit(exit_nfsd) 1452