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> 28b41b66d6SNeilBrown #include <linux/ctype.h> 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #include <linux/nfs.h> 311da177e4SLinus Torvalds #include <linux/nfsd_idmap.h> 32b41b66d6SNeilBrown #include <linux/lockd/bind.h> 331da177e4SLinus Torvalds #include <linux/sunrpc/svc.h> 3480212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 351da177e4SLinus Torvalds #include <linux/nfsd/nfsd.h> 361da177e4SLinus Torvalds #include <linux/nfsd/cache.h> 371da177e4SLinus Torvalds #include <linux/nfsd/xdr.h> 381da177e4SLinus Torvalds #include <linux/nfsd/syscall.h> 394373ea84SWendy Cheng #include <linux/lockd/lockd.h> 404116092bSChuck Lever #include <linux/sunrpc/clnt.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); 177ed2d8aedSRyusei Yamaguchi extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); 17803cf6c9fSGreg Banks 179828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 18003cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 18103cf6c9fSGreg Banks .read = seq_read, 18203cf6c9fSGreg Banks .llseek = seq_lseek, 183ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 18403cf6c9fSGreg Banks .owner = THIS_MODULE, 18503cf6c9fSGreg Banks }; 18603cf6c9fSGreg Banks 1871da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 1881da177e4SLinus Torvalds /* 1891da177e4SLinus Torvalds * payload - write methods 1901da177e4SLinus Torvalds */ 1911da177e4SLinus Torvalds 192262a0982SChuck Lever /** 193262a0982SChuck Lever * write_svc - Start kernel's NFSD server 194262a0982SChuck Lever * 195262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/threads is preferred. 196262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 197262a0982SChuck Lever * 198262a0982SChuck Lever * Input: 199262a0982SChuck Lever * buf: struct nfsctl_svc 200262a0982SChuck Lever * svc_port: port number of this 201262a0982SChuck Lever * server's listener 202262a0982SChuck Lever * svc_nthreads: number of threads to start 203262a0982SChuck Lever * size: size in bytes of passed in nfsctl_svc 204262a0982SChuck Lever * Output: 205262a0982SChuck Lever * On success: returns zero 206262a0982SChuck Lever * On error: return code is negative errno value 207262a0982SChuck Lever */ 2081da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size) 2091da177e4SLinus Torvalds { 2101da177e4SLinus Torvalds struct nfsctl_svc *data; 21182e12fe9SNeilBrown int err; 2121da177e4SLinus Torvalds if (size < sizeof(*data)) 2131da177e4SLinus Torvalds return -EINVAL; 2141da177e4SLinus Torvalds data = (struct nfsctl_svc*) buf; 21582e12fe9SNeilBrown err = nfsd_svc(data->svc_port, data->svc_nthreads); 21682e12fe9SNeilBrown if (err < 0) 21782e12fe9SNeilBrown return err; 21882e12fe9SNeilBrown return 0; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds 221262a0982SChuck Lever /** 222262a0982SChuck Lever * write_add - Add or modify client entry in auth unix cache 223262a0982SChuck Lever * 224262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 225262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 226262a0982SChuck Lever * 227262a0982SChuck Lever * Input: 228262a0982SChuck Lever * buf: struct nfsctl_client 229262a0982SChuck Lever * cl_ident: '\0'-terminated C string 230262a0982SChuck Lever * containing domain name 231262a0982SChuck Lever * of client 232262a0982SChuck Lever * cl_naddr: no. of items in cl_addrlist 233262a0982SChuck Lever * cl_addrlist: array of client addresses 234262a0982SChuck Lever * cl_fhkeytype: ignored 235262a0982SChuck Lever * cl_fhkeylen: ignored 236262a0982SChuck Lever * cl_fhkey: ignored 237262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 238262a0982SChuck Lever * Output: 239262a0982SChuck Lever * On success: returns zero 240262a0982SChuck Lever * On error: return code is negative errno value 241262a0982SChuck Lever * 242262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 243262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 244262a0982SChuck Lever */ 2451da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size) 2461da177e4SLinus Torvalds { 2471da177e4SLinus Torvalds struct nfsctl_client *data; 2481da177e4SLinus Torvalds if (size < sizeof(*data)) 2491da177e4SLinus Torvalds return -EINVAL; 2501da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2511da177e4SLinus Torvalds return exp_addclient(data); 2521da177e4SLinus Torvalds } 2531da177e4SLinus Torvalds 254262a0982SChuck Lever /** 255262a0982SChuck Lever * write_del - Remove client from auth unix cache 256262a0982SChuck Lever * 257262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 258262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 259262a0982SChuck Lever * 260262a0982SChuck Lever * Input: 261262a0982SChuck Lever * buf: struct nfsctl_client 262262a0982SChuck Lever * cl_ident: '\0'-terminated C string 263262a0982SChuck Lever * containing domain name 264262a0982SChuck Lever * of client 265262a0982SChuck Lever * cl_naddr: ignored 266262a0982SChuck Lever * cl_addrlist: ignored 267262a0982SChuck Lever * cl_fhkeytype: ignored 268262a0982SChuck Lever * cl_fhkeylen: ignored 269262a0982SChuck Lever * cl_fhkey: ignored 270262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 271262a0982SChuck Lever * Output: 272262a0982SChuck Lever * On success: returns zero 273262a0982SChuck Lever * On error: return code is negative errno value 274262a0982SChuck Lever * 275262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 276262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 277262a0982SChuck Lever */ 2781da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size) 2791da177e4SLinus Torvalds { 2801da177e4SLinus Torvalds struct nfsctl_client *data; 2811da177e4SLinus Torvalds if (size < sizeof(*data)) 2821da177e4SLinus Torvalds return -EINVAL; 2831da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2841da177e4SLinus Torvalds return exp_delclient(data); 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 287262a0982SChuck Lever /** 288262a0982SChuck Lever * write_export - Export part or all of a local file system 289262a0982SChuck Lever * 290262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 291262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 292262a0982SChuck Lever * 293262a0982SChuck Lever * Input: 294262a0982SChuck Lever * buf: struct nfsctl_export 295262a0982SChuck Lever * ex_client: '\0'-terminated C string 296262a0982SChuck Lever * containing domain name 297262a0982SChuck Lever * of client allowed to access 298262a0982SChuck Lever * this export 299262a0982SChuck Lever * ex_path: '\0'-terminated C string 300262a0982SChuck Lever * containing pathname of 301262a0982SChuck Lever * directory in local file system 302262a0982SChuck Lever * ex_dev: fsid to use for this export 303262a0982SChuck Lever * ex_ino: ignored 304262a0982SChuck Lever * ex_flags: export flags for this export 305262a0982SChuck Lever * ex_anon_uid: UID to use for anonymous 306262a0982SChuck Lever * requests 307262a0982SChuck Lever * ex_anon_gid: GID to use for anonymous 308262a0982SChuck Lever * requests 309262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 310262a0982SChuck Lever * Output: 311262a0982SChuck Lever * On success: returns zero 312262a0982SChuck Lever * On error: return code is negative errno value 313262a0982SChuck Lever */ 3141da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size) 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds struct nfsctl_export *data; 3171da177e4SLinus Torvalds if (size < sizeof(*data)) 3181da177e4SLinus Torvalds return -EINVAL; 3191da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3201da177e4SLinus Torvalds return exp_export(data); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 323262a0982SChuck Lever /** 324262a0982SChuck Lever * write_unexport - Unexport a previously exported file system 325262a0982SChuck Lever * 326262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 327262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 328262a0982SChuck Lever * 329262a0982SChuck Lever * Input: 330262a0982SChuck Lever * buf: struct nfsctl_export 331262a0982SChuck Lever * ex_client: '\0'-terminated C string 332262a0982SChuck Lever * containing domain name 333262a0982SChuck Lever * of client no longer allowed 334262a0982SChuck Lever * to access this export 335262a0982SChuck Lever * ex_path: '\0'-terminated C string 336262a0982SChuck Lever * containing pathname of 337262a0982SChuck Lever * directory in local file system 338262a0982SChuck Lever * ex_dev: ignored 339262a0982SChuck Lever * ex_ino: ignored 340262a0982SChuck Lever * ex_flags: ignored 341262a0982SChuck Lever * ex_anon_uid: ignored 342262a0982SChuck Lever * ex_anon_gid: ignored 343262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 344262a0982SChuck Lever * Output: 345262a0982SChuck Lever * On success: returns zero 346262a0982SChuck Lever * On error: return code is negative errno value 347262a0982SChuck Lever */ 3481da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds struct nfsctl_export *data; 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds if (size < sizeof(*data)) 3531da177e4SLinus Torvalds return -EINVAL; 3541da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3551da177e4SLinus Torvalds return exp_unexport(data); 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 358262a0982SChuck Lever /** 359262a0982SChuck Lever * write_getfs - Get a variable-length NFS file handle by path 360262a0982SChuck Lever * 361262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 362262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 363262a0982SChuck Lever * 364262a0982SChuck Lever * Input: 365262a0982SChuck Lever * buf: struct nfsctl_fsparm 366262a0982SChuck Lever * gd_addr: socket address of client 367262a0982SChuck Lever * gd_path: '\0'-terminated C string 368262a0982SChuck Lever * containing pathname of 369262a0982SChuck Lever * directory in local file system 370262a0982SChuck Lever * gd_maxlen: maximum size of returned file 371262a0982SChuck Lever * handle 372262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fsparm 373262a0982SChuck Lever * Output: 374262a0982SChuck Lever * On success: passed-in buffer filled with a knfsd_fh structure 375262a0982SChuck Lever * (a variable-length raw NFS file handle); 376262a0982SChuck Lever * return code is the size in bytes of the file handle 377262a0982SChuck Lever * On error: return code is negative errno value 378262a0982SChuck Lever * 379262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 380262a0982SChuck Lever * is the same size as a struct sockaddr_in. 381262a0982SChuck Lever */ 3821da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size) 3831da177e4SLinus Torvalds { 3841da177e4SLinus Torvalds struct nfsctl_fsparm *data; 3851da177e4SLinus Torvalds struct sockaddr_in *sin; 3861da177e4SLinus Torvalds struct auth_domain *clp; 3871da177e4SLinus Torvalds int err = 0; 3881da177e4SLinus Torvalds struct knfsd_fh *res; 389f15364bdSAurélien Charbon struct in6_addr in6; 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds if (size < sizeof(*data)) 3921da177e4SLinus Torvalds return -EINVAL; 3931da177e4SLinus Torvalds data = (struct nfsctl_fsparm*)buf; 3941da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 3951da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 3961da177e4SLinus Torvalds goto out; 3971da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 3981da177e4SLinus Torvalds if (data->gd_maxlen > NFS3_FHSIZE) 3991da177e4SLinus Torvalds data->gd_maxlen = NFS3_FHSIZE; 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds res = (struct knfsd_fh*)buf; 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds exp_readlock(); 404f15364bdSAurélien Charbon 405f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 406f15364bdSAurélien Charbon 407f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 408f15364bdSAurélien Charbon if (!clp) 4091da177e4SLinus Torvalds err = -EPERM; 4101da177e4SLinus Torvalds else { 4111da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); 4121da177e4SLinus Torvalds auth_domain_put(clp); 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds exp_readunlock(); 4151da177e4SLinus Torvalds if (err == 0) 41612127498SAndrew Morton err = res->fh_size + offsetof(struct knfsd_fh, fh_base); 4171da177e4SLinus Torvalds out: 4181da177e4SLinus Torvalds return err; 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds 421262a0982SChuck Lever /** 422262a0982SChuck Lever * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) 423262a0982SChuck Lever * 424262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 425262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 426262a0982SChuck Lever * 427262a0982SChuck Lever * Input: 428262a0982SChuck Lever * buf: struct nfsctl_fdparm 429262a0982SChuck Lever * gd_addr: socket address of client 430262a0982SChuck Lever * gd_path: '\0'-terminated C string 431262a0982SChuck Lever * containing pathname of 432262a0982SChuck Lever * directory in local file system 433262a0982SChuck Lever * gd_version: fdparm structure version 434262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fdparm 435262a0982SChuck Lever * Output: 436262a0982SChuck Lever * On success: passed-in buffer filled with nfsctl_res 437262a0982SChuck Lever * (a fixed-length raw NFS file handle); 438262a0982SChuck Lever * return code is the size in bytes of the file handle 439262a0982SChuck Lever * On error: return code is negative errno value 440262a0982SChuck Lever * 441262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 442262a0982SChuck Lever * is the same size as a struct sockaddr_in. 443262a0982SChuck Lever */ 4441da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size) 4451da177e4SLinus Torvalds { 4461da177e4SLinus Torvalds struct nfsctl_fdparm *data; 4471da177e4SLinus Torvalds struct sockaddr_in *sin; 4481da177e4SLinus Torvalds struct auth_domain *clp; 4491da177e4SLinus Torvalds int err = 0; 4501da177e4SLinus Torvalds struct knfsd_fh fh; 4511da177e4SLinus Torvalds char *res; 452f15364bdSAurélien Charbon struct in6_addr in6; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds if (size < sizeof(*data)) 4551da177e4SLinus Torvalds return -EINVAL; 4561da177e4SLinus Torvalds data = (struct nfsctl_fdparm*)buf; 4571da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 4581da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 4591da177e4SLinus Torvalds goto out; 4601da177e4SLinus Torvalds err = -EINVAL; 4611da177e4SLinus Torvalds if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) 4621da177e4SLinus Torvalds goto out; 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds res = buf; 4651da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 4661da177e4SLinus Torvalds exp_readlock(); 467f15364bdSAurélien Charbon 468f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 469f15364bdSAurélien Charbon 470f15364bdSAurélien Charbon clp = auth_unix_lookup(&in6); 471f15364bdSAurélien Charbon if (!clp) 4721da177e4SLinus Torvalds err = -EPERM; 4731da177e4SLinus Torvalds else { 4741da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); 4751da177e4SLinus Torvalds auth_domain_put(clp); 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds exp_readunlock(); 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds if (err == 0) { 4801da177e4SLinus Torvalds memset(res,0, NFS_FHSIZE); 4811da177e4SLinus Torvalds memcpy(res, &fh.fh_base, fh.fh_size); 4821da177e4SLinus Torvalds err = NFS_FHSIZE; 4831da177e4SLinus Torvalds } 4841da177e4SLinus Torvalds out: 4851da177e4SLinus Torvalds return err; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 488262a0982SChuck Lever /** 489262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 490262a0982SChuck Lever * 491262a0982SChuck Lever * Experimental. 492262a0982SChuck Lever * 493262a0982SChuck Lever * Input: 494262a0982SChuck Lever * buf: '\n'-terminated C string containing a 4954116092bSChuck Lever * presentation format IP address 496262a0982SChuck Lever * size: length of C string in @buf 497262a0982SChuck Lever * Output: 498262a0982SChuck Lever * On success: returns zero if all specified locks were released; 499262a0982SChuck Lever * returns one if one or more locks were not released 500262a0982SChuck Lever * On error: return code is negative errno value 501262a0982SChuck Lever */ 502b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 5034373ea84SWendy Cheng { 5044116092bSChuck Lever struct sockaddr_storage address; 5054116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 5064116092bSChuck Lever size_t salen = sizeof(address); 507367c8c7bSChuck Lever char *fo_path; 5084373ea84SWendy Cheng 5094373ea84SWendy Cheng /* sanity check */ 5104373ea84SWendy Cheng if (size == 0) 5114373ea84SWendy Cheng return -EINVAL; 5124373ea84SWendy Cheng 5134373ea84SWendy Cheng if (buf[size-1] != '\n') 5144373ea84SWendy Cheng return -EINVAL; 5154373ea84SWendy Cheng 5164373ea84SWendy Cheng fo_path = buf; 5174373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 5184373ea84SWendy Cheng return -EINVAL; 5194373ea84SWendy Cheng 5204116092bSChuck Lever if (rpc_pton(fo_path, size, sap, salen) == 0) 5214373ea84SWendy Cheng return -EINVAL; 5224373ea84SWendy Cheng 5234116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 5244373ea84SWendy Cheng } 5254373ea84SWendy Cheng 526262a0982SChuck Lever /** 527262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 528262a0982SChuck Lever * 529262a0982SChuck Lever * Experimental. 530262a0982SChuck Lever * 531262a0982SChuck Lever * Input: 532262a0982SChuck Lever * buf: '\n'-terminated C string containing the 533262a0982SChuck Lever * absolute pathname of a local file system 534262a0982SChuck Lever * size: length of C string in @buf 535262a0982SChuck Lever * Output: 536262a0982SChuck Lever * On success: returns zero if all specified locks were released; 537262a0982SChuck Lever * returns one if one or more locks were not released 538262a0982SChuck Lever * On error: return code is negative errno value 539262a0982SChuck Lever */ 540b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 54117efa372SWendy Cheng { 542a63bb996SAl Viro struct path path; 54317efa372SWendy Cheng char *fo_path; 54417efa372SWendy Cheng int error; 54517efa372SWendy Cheng 54617efa372SWendy Cheng /* sanity check */ 54717efa372SWendy Cheng if (size == 0) 54817efa372SWendy Cheng return -EINVAL; 54917efa372SWendy Cheng 55017efa372SWendy Cheng if (buf[size-1] != '\n') 55117efa372SWendy Cheng return -EINVAL; 55217efa372SWendy Cheng 55317efa372SWendy Cheng fo_path = buf; 55417efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 55517efa372SWendy Cheng return -EINVAL; 55617efa372SWendy Cheng 557a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 55817efa372SWendy Cheng if (error) 55917efa372SWendy Cheng return error; 56017efa372SWendy Cheng 561262a0982SChuck Lever /* 562262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 563262a0982SChuck Lever * releasing locks on the wrong file system. 564262a0982SChuck Lever * 565262a0982SChuck Lever * For example: 566262a0982SChuck Lever * 1. Does the path refer to a directory? 567262a0982SChuck Lever * 2. Is that directory a mount point, or 568262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 569262a0982SChuck Lever */ 570a63bb996SAl Viro error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); 57117efa372SWendy Cheng 572a63bb996SAl Viro path_put(&path); 57317efa372SWendy Cheng return error; 57417efa372SWendy Cheng } 57517efa372SWendy Cheng 576262a0982SChuck Lever /** 577262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 578262a0982SChuck Lever * 579262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 580262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 581262a0982SChuck Lever * contain escape sequences. 582262a0982SChuck Lever * 583262a0982SChuck Lever * Input: 584262a0982SChuck Lever * buf: 585262a0982SChuck Lever * domain: client domain name 586262a0982SChuck Lever * path: export pathname 587262a0982SChuck Lever * maxsize: numeric maximum size of 588262a0982SChuck Lever * @buf 589262a0982SChuck Lever * size: length of C string in @buf 590262a0982SChuck Lever * Output: 591262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 592262a0982SChuck Lever * string containing a ASCII hex text version 593262a0982SChuck Lever * of the NFS file handle; 594262a0982SChuck Lever * return code is the size in bytes of the string 595262a0982SChuck Lever * On error: return code is negative errno value 596262a0982SChuck Lever */ 5971da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 5981da177e4SLinus Torvalds { 5991da177e4SLinus Torvalds char *dname, *path; 600246d95baSAndrew Morton int uninitialized_var(maxsize); 6011da177e4SLinus Torvalds char *mesg = buf; 6021da177e4SLinus Torvalds int len; 6031da177e4SLinus Torvalds struct auth_domain *dom; 6041da177e4SLinus Torvalds struct knfsd_fh fh; 6051da177e4SLinus Torvalds 60687d26ea7SJ. Bruce Fields if (size == 0) 60787d26ea7SJ. Bruce Fields return -EINVAL; 60887d26ea7SJ. Bruce Fields 6091da177e4SLinus Torvalds if (buf[size-1] != '\n') 6101da177e4SLinus Torvalds return -EINVAL; 6111da177e4SLinus Torvalds buf[size-1] = 0; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds dname = mesg; 6141da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 61554224f04SChuck Lever if (len <= 0) 61654224f04SChuck Lever return -EINVAL; 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds path = dname+len+1; 6191da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 62054224f04SChuck Lever if (len <= 0) 62154224f04SChuck Lever return -EINVAL; 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 6241da177e4SLinus Torvalds if (len) 6251da177e4SLinus Torvalds return len; 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 6281da177e4SLinus Torvalds return -EINVAL; 6291da177e4SLinus Torvalds if (maxsize > NFS3_FHSIZE) 6301da177e4SLinus Torvalds maxsize = NFS3_FHSIZE; 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 6331da177e4SLinus Torvalds return -EINVAL; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 6361da177e4SLinus Torvalds dom = unix_domain_find(dname); 6371da177e4SLinus Torvalds if (!dom) 6381da177e4SLinus Torvalds return -ENOMEM; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds len = exp_rootfh(dom, path, &fh, maxsize); 6411da177e4SLinus Torvalds auth_domain_put(dom); 6421da177e4SLinus Torvalds if (len) 6431da177e4SLinus Torvalds return len; 6441da177e4SLinus Torvalds 64554224f04SChuck Lever mesg = buf; 64654224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 6471da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 6481da177e4SLinus Torvalds mesg[-1] = '\n'; 6491da177e4SLinus Torvalds return mesg - buf; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds 652262a0982SChuck Lever /** 653262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 654262a0982SChuck Lever * 655262a0982SChuck Lever * Input: 656262a0982SChuck Lever * buf: ignored 657262a0982SChuck Lever * size: zero 658262a0982SChuck Lever * Output: 659262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 660262a0982SChuck Lever * string numeric value representing the number of 661262a0982SChuck Lever * running NFSD threads; 662262a0982SChuck Lever * return code is the size in bytes of the string 663262a0982SChuck Lever * On error: return code is zero 664262a0982SChuck Lever * 665262a0982SChuck Lever * OR 666262a0982SChuck Lever * 667262a0982SChuck Lever * Input: 668262a0982SChuck Lever * buf: C string containing an unsigned 669262a0982SChuck Lever * integer value representing the 670262a0982SChuck Lever * number of NFSD threads to start 671262a0982SChuck Lever * size: non-zero length of C string in @buf 672262a0982SChuck Lever * Output: 673262a0982SChuck Lever * On success: NFS service is started; 674262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 675262a0982SChuck Lever * string numeric value representing the number of 676262a0982SChuck Lever * running NFSD threads; 677262a0982SChuck Lever * return code is the size in bytes of the string 678262a0982SChuck Lever * On error: return code is zero or a negative errno value 679262a0982SChuck Lever */ 6801da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds char *mesg = buf; 6831da177e4SLinus Torvalds int rv; 6841da177e4SLinus Torvalds if (size > 0) { 6851da177e4SLinus Torvalds int newthreads; 6861da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 6871da177e4SLinus Torvalds if (rv) 6881da177e4SLinus Torvalds return rv; 6891da177e4SLinus Torvalds if (newthreads < 0) 6901da177e4SLinus Torvalds return -EINVAL; 6919e074856SChuck Lever rv = nfsd_svc(NFS_PORT, newthreads); 69282e12fe9SNeilBrown if (rv < 0) 6931da177e4SLinus Torvalds return rv; 69482e12fe9SNeilBrown } else 69582e12fe9SNeilBrown rv = nfsd_nrthreads(); 696e06b6405SChuck Lever 69782e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 6981da177e4SLinus Torvalds } 6991da177e4SLinus Torvalds 700262a0982SChuck Lever /** 701262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 702262a0982SChuck Lever * 703262a0982SChuck Lever * Input: 704262a0982SChuck Lever * buf: ignored 705262a0982SChuck Lever * size: zero 706262a0982SChuck Lever * 707262a0982SChuck Lever * OR 708262a0982SChuck Lever * 709262a0982SChuck Lever * Input: 710262a0982SChuck Lever * buf: C string containing whitespace- 711262a0982SChuck Lever * separated unsigned integer values 712262a0982SChuck Lever * representing the number of NFSD 713262a0982SChuck Lever * threads to start in each pool 714262a0982SChuck Lever * size: non-zero length of C string in @buf 715262a0982SChuck Lever * Output: 716262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 717262a0982SChuck Lever * string containing integer values representing the 718262a0982SChuck Lever * number of NFSD threads in each pool; 719262a0982SChuck Lever * return code is the size in bytes of the string 720262a0982SChuck Lever * On error: return code is zero or a negative errno value 721262a0982SChuck Lever */ 722eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 723eed2965aSGreg Banks { 724eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 725eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 726eed2965aSGreg Banks */ 727eed2965aSGreg Banks char *mesg = buf; 728eed2965aSGreg Banks int i; 729eed2965aSGreg Banks int rv; 730eed2965aSGreg Banks int len; 731bedbdd8bSNeil Brown int npools; 732eed2965aSGreg Banks int *nthreads; 733eed2965aSGreg Banks 734bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 735bedbdd8bSNeil Brown npools = nfsd_nrpools(); 736eed2965aSGreg Banks if (npools == 0) { 737eed2965aSGreg Banks /* 738eed2965aSGreg Banks * NFS is shut down. The admin can start it by 739eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 740eed2965aSGreg Banks * file, sorry. Report zero threads. 741eed2965aSGreg Banks */ 742bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 743eed2965aSGreg Banks strcpy(buf, "0\n"); 744eed2965aSGreg Banks return strlen(buf); 745eed2965aSGreg Banks } 746eed2965aSGreg Banks 747eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 748bedbdd8bSNeil Brown rv = -ENOMEM; 749eed2965aSGreg Banks if (nthreads == NULL) 750bedbdd8bSNeil Brown goto out_free; 751eed2965aSGreg Banks 752eed2965aSGreg Banks if (size > 0) { 753eed2965aSGreg Banks for (i = 0; i < npools; i++) { 754eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 755eed2965aSGreg Banks if (rv == -ENOENT) 756eed2965aSGreg Banks break; /* fewer numbers than pools */ 757eed2965aSGreg Banks if (rv) 758eed2965aSGreg Banks goto out_free; /* syntax error */ 759eed2965aSGreg Banks rv = -EINVAL; 760eed2965aSGreg Banks if (nthreads[i] < 0) 761eed2965aSGreg Banks goto out_free; 762eed2965aSGreg Banks } 763eed2965aSGreg Banks rv = nfsd_set_nrthreads(i, nthreads); 764eed2965aSGreg Banks if (rv) 765eed2965aSGreg Banks goto out_free; 766eed2965aSGreg Banks } 767eed2965aSGreg Banks 768eed2965aSGreg Banks rv = nfsd_get_nrthreads(npools, nthreads); 769eed2965aSGreg Banks if (rv) 770eed2965aSGreg Banks goto out_free; 771eed2965aSGreg Banks 772eed2965aSGreg Banks mesg = buf; 773eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 774eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 775eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 776eed2965aSGreg Banks len = strlen(mesg); 777eed2965aSGreg Banks size -= len; 778eed2965aSGreg Banks mesg += len; 779eed2965aSGreg Banks } 780413d63d7SJ. Bruce Fields rv = mesg - buf; 781eed2965aSGreg Banks out_free: 782eed2965aSGreg Banks kfree(nthreads); 783bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 784eed2965aSGreg Banks return rv; 785eed2965aSGreg Banks } 786eed2965aSGreg Banks 7873dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 78870c3b76cSNeilBrown { 78970c3b76cSNeilBrown char *mesg = buf; 7908daf220aSBenny Halevy char *vers, *minorp, sign; 791261758b5SChuck Lever int len, num, remaining; 7928daf220aSBenny Halevy unsigned minor; 79370c3b76cSNeilBrown ssize_t tlen = 0; 79470c3b76cSNeilBrown char *sep; 79570c3b76cSNeilBrown 79670c3b76cSNeilBrown if (size>0) { 79770c3b76cSNeilBrown if (nfsd_serv) 7986658d3a7SNeilBrown /* Cannot change versions without updating 7996658d3a7SNeilBrown * nfsd_serv->sv_xdrsize, and reallocing 8006658d3a7SNeilBrown * rq_argp and rq_resp 8016658d3a7SNeilBrown */ 80270c3b76cSNeilBrown return -EBUSY; 80370c3b76cSNeilBrown if (buf[size-1] != '\n') 80470c3b76cSNeilBrown return -EINVAL; 80570c3b76cSNeilBrown buf[size-1] = 0; 80670c3b76cSNeilBrown 80770c3b76cSNeilBrown vers = mesg; 80870c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 80970c3b76cSNeilBrown if (len <= 0) return -EINVAL; 81070c3b76cSNeilBrown do { 81170c3b76cSNeilBrown sign = *vers; 81270c3b76cSNeilBrown if (sign == '+' || sign == '-') 8138daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 81470c3b76cSNeilBrown else 8158daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 8168daf220aSBenny Halevy if (*minorp == '.') { 8178daf220aSBenny Halevy if (num < 4) 8188daf220aSBenny Halevy return -EINVAL; 8198daf220aSBenny Halevy minor = simple_strtoul(minorp+1, NULL, 0); 8208daf220aSBenny Halevy if (minor == 0) 8218daf220aSBenny Halevy return -EINVAL; 8228daf220aSBenny Halevy if (nfsd_minorversion(minor, sign == '-' ? 8238daf220aSBenny Halevy NFSD_CLEAR : NFSD_SET) < 0) 8248daf220aSBenny Halevy return -EINVAL; 8258daf220aSBenny Halevy goto next; 8268daf220aSBenny Halevy } 82770c3b76cSNeilBrown switch(num) { 82870c3b76cSNeilBrown case 2: 82970c3b76cSNeilBrown case 3: 83070c3b76cSNeilBrown case 4: 8316658d3a7SNeilBrown nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 83270c3b76cSNeilBrown break; 83370c3b76cSNeilBrown default: 83470c3b76cSNeilBrown return -EINVAL; 83570c3b76cSNeilBrown } 8368daf220aSBenny Halevy next: 83770c3b76cSNeilBrown vers += len + 1; 83870c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 83970c3b76cSNeilBrown /* If all get turned off, turn them back on, as 84070c3b76cSNeilBrown * having no versions is BAD 84170c3b76cSNeilBrown */ 8426658d3a7SNeilBrown nfsd_reset_versions(); 84370c3b76cSNeilBrown } 844261758b5SChuck Lever 84570c3b76cSNeilBrown /* Now write current state into reply buffer */ 84670c3b76cSNeilBrown len = 0; 84770c3b76cSNeilBrown sep = ""; 848261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 84970c3b76cSNeilBrown for (num=2 ; num <= 4 ; num++) 8506658d3a7SNeilBrown if (nfsd_vers(num, NFSD_AVAIL)) { 851261758b5SChuck Lever len = snprintf(buf, remaining, "%s%c%d", sep, 8526658d3a7SNeilBrown nfsd_vers(num, NFSD_TEST)?'+':'-', 85370c3b76cSNeilBrown num); 85470c3b76cSNeilBrown sep = " "; 855261758b5SChuck Lever 856261758b5SChuck Lever if (len > remaining) 857261758b5SChuck Lever break; 858261758b5SChuck Lever remaining -= len; 859261758b5SChuck Lever buf += len; 860261758b5SChuck Lever tlen += len; 86170c3b76cSNeilBrown } 8628daf220aSBenny Halevy if (nfsd_vers(4, NFSD_AVAIL)) 863261758b5SChuck Lever for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 864261758b5SChuck Lever minor++) { 865261758b5SChuck Lever len = snprintf(buf, remaining, " %c4.%u", 8668daf220aSBenny Halevy (nfsd_vers(4, NFSD_TEST) && 8678daf220aSBenny Halevy nfsd_minorversion(minor, NFSD_TEST)) ? 8688daf220aSBenny Halevy '+' : '-', 8698daf220aSBenny Halevy minor); 870261758b5SChuck Lever 871261758b5SChuck Lever if (len > remaining) 872261758b5SChuck Lever break; 873261758b5SChuck Lever remaining -= len; 874261758b5SChuck Lever buf += len; 875261758b5SChuck Lever tlen += len; 876261758b5SChuck Lever } 877261758b5SChuck Lever 878261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 879261758b5SChuck Lever if (len > remaining) 880261758b5SChuck Lever return -EINVAL; 881261758b5SChuck Lever return tlen + len; 88270c3b76cSNeilBrown } 88370c3b76cSNeilBrown 884262a0982SChuck Lever /** 885262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 886262a0982SChuck Lever * 887262a0982SChuck Lever * Input: 888262a0982SChuck Lever * buf: ignored 889262a0982SChuck Lever * size: zero 890262a0982SChuck Lever * Output: 891262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 892262a0982SChuck Lever * string containing positive or negative integer 893262a0982SChuck Lever * values representing the current status of each 894262a0982SChuck Lever * protocol version; 895262a0982SChuck Lever * return code is the size in bytes of the string 896262a0982SChuck Lever * On error: return code is zero or a negative errno value 897262a0982SChuck Lever * 898262a0982SChuck Lever * OR 899262a0982SChuck Lever * 900262a0982SChuck Lever * Input: 901262a0982SChuck Lever * buf: C string containing whitespace- 902262a0982SChuck Lever * separated positive or negative 903262a0982SChuck Lever * integer values representing NFS 904262a0982SChuck Lever * protocol versions to enable ("+n") 905262a0982SChuck Lever * or disable ("-n") 906262a0982SChuck Lever * size: non-zero length of C string in @buf 907262a0982SChuck Lever * Output: 908262a0982SChuck Lever * On success: status of zero or more protocol versions has 909262a0982SChuck Lever * been updated; passed-in buffer filled with 910262a0982SChuck Lever * '\n'-terminated C string containing positive 911262a0982SChuck Lever * or negative integer values representing the 912262a0982SChuck Lever * current status of each protocol version; 913262a0982SChuck Lever * return code is the size in bytes of the string 914262a0982SChuck Lever * On error: return code is zero or a negative errno value 915262a0982SChuck Lever */ 9163dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 9173dd98a3bSJeff Layton { 9183dd98a3bSJeff Layton ssize_t rv; 9193dd98a3bSJeff Layton 9203dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 9213dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 9223dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 9233dd98a3bSJeff Layton return rv; 9243dd98a3bSJeff Layton } 9253dd98a3bSJeff Layton 9264cd5dc75SChuck Lever /* 9270a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 9280a5372d8SChuck Lever * transports. 9290a5372d8SChuck Lever */ 9300a5372d8SChuck Lever static ssize_t __write_ports_names(char *buf) 9310a5372d8SChuck Lever { 9320a5372d8SChuck Lever if (nfsd_serv == NULL) 9330a5372d8SChuck Lever return 0; 934335c54bdSChuck Lever return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 9350a5372d8SChuck Lever } 9360a5372d8SChuck Lever 9370a5372d8SChuck Lever /* 9380b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 9390b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 9400b7c2f6fSChuck Lever * nfsd listener. 9410b7c2f6fSChuck Lever */ 9420b7c2f6fSChuck Lever static ssize_t __write_ports_addfd(char *buf) 9430b7c2f6fSChuck Lever { 9440b7c2f6fSChuck Lever char *mesg = buf; 9450b7c2f6fSChuck Lever int fd, err; 9460b7c2f6fSChuck Lever 9470b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 9480b7c2f6fSChuck Lever if (err != 0 || fd < 0) 9490b7c2f6fSChuck Lever return -EINVAL; 9500b7c2f6fSChuck Lever 9510b7c2f6fSChuck Lever err = nfsd_create_serv(); 9520b7c2f6fSChuck Lever if (err != 0) 9530b7c2f6fSChuck Lever return err; 9540b7c2f6fSChuck Lever 9550b7c2f6fSChuck Lever err = lockd_up(); 956ea068badSChuck Lever if (err != 0) 957ea068badSChuck Lever goto out; 9580b7c2f6fSChuck Lever 959bfba9ab4SChuck Lever err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 960ea068badSChuck Lever if (err < 0) 961ea068badSChuck Lever lockd_down(); 962ea068badSChuck Lever 963ea068badSChuck Lever out: 9640b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 9650b7c2f6fSChuck Lever nfsd_serv->sv_nrthreads--; 966ea068badSChuck Lever return err; 9670b7c2f6fSChuck Lever } 9680b7c2f6fSChuck Lever 9690b7c2f6fSChuck Lever /* 97082d56591SChuck Lever * A '-' followed by the 'name' of a socket means we close the socket. 97182d56591SChuck Lever */ 97282d56591SChuck Lever static ssize_t __write_ports_delfd(char *buf) 97382d56591SChuck Lever { 97482d56591SChuck Lever char *toclose; 97582d56591SChuck Lever int len = 0; 97682d56591SChuck Lever 97782d56591SChuck Lever toclose = kstrdup(buf + 1, GFP_KERNEL); 97882d56591SChuck Lever if (toclose == NULL) 97982d56591SChuck Lever return -ENOMEM; 98082d56591SChuck Lever 98182d56591SChuck Lever if (nfsd_serv != NULL) 9828435d34dSChuck Lever len = svc_sock_names(nfsd_serv, buf, 9838435d34dSChuck Lever SIMPLE_TRANSACTION_LIMIT, toclose); 98482d56591SChuck Lever if (len >= 0) 98582d56591SChuck Lever lockd_down(); 98682d56591SChuck Lever 98782d56591SChuck Lever kfree(toclose); 98882d56591SChuck Lever return len; 98982d56591SChuck Lever } 99082d56591SChuck Lever 99182d56591SChuck Lever /* 9924eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 9934eb68c26SChuck Lever * a port number. 9944eb68c26SChuck Lever */ 9954eb68c26SChuck Lever static ssize_t __write_ports_addxprt(char *buf) 9964eb68c26SChuck Lever { 9974eb68c26SChuck Lever char transport[16]; 9984eb68c26SChuck Lever int port, err; 9994eb68c26SChuck Lever 10004eb68c26SChuck Lever if (sscanf(buf, "%15s %4u", transport, &port) != 2) 10014eb68c26SChuck Lever return -EINVAL; 10024eb68c26SChuck Lever 10034eb68c26SChuck Lever if (port < 1 || port > USHORT_MAX) 10044eb68c26SChuck Lever return -EINVAL; 10054eb68c26SChuck Lever 10064eb68c26SChuck Lever err = nfsd_create_serv(); 10074eb68c26SChuck Lever if (err != 0) 10084eb68c26SChuck Lever return err; 10094eb68c26SChuck Lever 10104eb68c26SChuck Lever err = svc_create_xprt(nfsd_serv, transport, 10114eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 10124eb68c26SChuck Lever if (err < 0) { 10134eb68c26SChuck Lever /* Give a reasonable perror msg for bad transport string */ 10144eb68c26SChuck Lever if (err == -ENOENT) 10154eb68c26SChuck Lever err = -EPROTONOSUPPORT; 10164eb68c26SChuck Lever return err; 10174eb68c26SChuck Lever } 10184eb68c26SChuck Lever return 0; 10194eb68c26SChuck Lever } 10204eb68c26SChuck Lever 10214eb68c26SChuck Lever /* 10224cd5dc75SChuck Lever * A transport listener is removed by writing a "-", it's transport 10234cd5dc75SChuck Lever * name, and it's port number. 10244cd5dc75SChuck Lever */ 10254cd5dc75SChuck Lever static ssize_t __write_ports_delxprt(char *buf) 10264cd5dc75SChuck Lever { 10274cd5dc75SChuck Lever struct svc_xprt *xprt; 10284cd5dc75SChuck Lever char transport[16]; 10294cd5dc75SChuck Lever int port; 10304cd5dc75SChuck Lever 10314cd5dc75SChuck Lever if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) 10324cd5dc75SChuck Lever return -EINVAL; 10334cd5dc75SChuck Lever 10344cd5dc75SChuck Lever if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) 10354cd5dc75SChuck Lever return -EINVAL; 10364cd5dc75SChuck Lever 10374cd5dc75SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); 10384cd5dc75SChuck Lever if (xprt == NULL) 10394cd5dc75SChuck Lever return -ENOTCONN; 10404cd5dc75SChuck Lever 10414cd5dc75SChuck Lever svc_close_xprt(xprt); 10424cd5dc75SChuck Lever svc_xprt_put(xprt); 10434cd5dc75SChuck Lever return 0; 10444cd5dc75SChuck Lever } 10454cd5dc75SChuck Lever 1046bedbdd8bSNeil Brown static ssize_t __write_ports(struct file *file, char *buf, size_t size) 104780212d59SNeilBrown { 10480a5372d8SChuck Lever if (size == 0) 10490a5372d8SChuck Lever return __write_ports_names(buf); 10500b7c2f6fSChuck Lever 10510b7c2f6fSChuck Lever if (isdigit(buf[0])) 10520b7c2f6fSChuck Lever return __write_ports_addfd(buf); 105382d56591SChuck Lever 105482d56591SChuck Lever if (buf[0] == '-' && isdigit(buf[1])) 105582d56591SChuck Lever return __write_ports_delfd(buf); 10564eb68c26SChuck Lever 10574eb68c26SChuck Lever if (isalpha(buf[0])) 10584eb68c26SChuck Lever return __write_ports_addxprt(buf); 10594cd5dc75SChuck Lever 10604cd5dc75SChuck Lever if (buf[0] == '-' && isalpha(buf[1])) 10614cd5dc75SChuck Lever return __write_ports_delxprt(buf); 10624cd5dc75SChuck Lever 1063b41b66d6SNeilBrown return -EINVAL; 1064b41b66d6SNeilBrown } 106580212d59SNeilBrown 1066262a0982SChuck Lever /** 1067262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 1068262a0982SChuck Lever * 1069262a0982SChuck Lever * Input: 1070262a0982SChuck Lever * buf: ignored 1071262a0982SChuck Lever * size: zero 1072262a0982SChuck Lever * Output: 1073262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 1074262a0982SChuck Lever * string containing a whitespace-separated list of 1075262a0982SChuck Lever * named NFSD listeners; 1076262a0982SChuck Lever * return code is the size in bytes of the string 1077262a0982SChuck Lever * On error: return code is zero or a negative errno value 1078262a0982SChuck Lever * 1079262a0982SChuck Lever * OR 1080262a0982SChuck Lever * 1081262a0982SChuck Lever * Input: 1082262a0982SChuck Lever * buf: C string containing an unsigned 1083262a0982SChuck Lever * integer value representing a bound 1084262a0982SChuck Lever * but unconnected socket that is to be 1085c71206a7SChuck Lever * used as an NFSD listener; listen(3) 1086c71206a7SChuck Lever * must be called for a SOCK_STREAM 1087c71206a7SChuck Lever * socket, otherwise it is ignored 1088262a0982SChuck Lever * size: non-zero length of C string in @buf 1089262a0982SChuck Lever * Output: 1090262a0982SChuck Lever * On success: NFS service is started; 1091262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1092262a0982SChuck Lever * string containing a unique alphanumeric name of 1093262a0982SChuck Lever * the listener; 1094262a0982SChuck Lever * return code is the size in bytes of the string 1095262a0982SChuck Lever * On error: return code is a negative errno value 1096262a0982SChuck Lever * 1097262a0982SChuck Lever * OR 1098262a0982SChuck Lever * 1099262a0982SChuck Lever * Input: 1100262a0982SChuck Lever * buf: C string containing a "-" followed 1101262a0982SChuck Lever * by an integer value representing a 1102262a0982SChuck Lever * previously passed in socket file 1103262a0982SChuck Lever * descriptor 1104262a0982SChuck Lever * size: non-zero length of C string in @buf 1105262a0982SChuck Lever * Output: 1106262a0982SChuck Lever * On success: NFS service no longer listens on that socket; 1107262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1108262a0982SChuck Lever * string containing a unique name of the listener; 1109262a0982SChuck Lever * return code is the size in bytes of the string 1110262a0982SChuck Lever * On error: return code is a negative errno value 1111262a0982SChuck Lever * 1112262a0982SChuck Lever * OR 1113262a0982SChuck Lever * 1114262a0982SChuck Lever * Input: 1115262a0982SChuck Lever * buf: C string containing a transport 1116262a0982SChuck Lever * name and an unsigned integer value 1117262a0982SChuck Lever * representing the port to listen on, 1118262a0982SChuck Lever * separated by whitespace 1119262a0982SChuck Lever * size: non-zero length of C string in @buf 1120262a0982SChuck Lever * Output: 1121262a0982SChuck Lever * On success: returns zero; NFS service is started 1122262a0982SChuck Lever * On error: return code is a negative errno value 1123262a0982SChuck Lever * 1124262a0982SChuck Lever * OR 1125262a0982SChuck Lever * 1126262a0982SChuck Lever * Input: 1127262a0982SChuck Lever * buf: C string containing a "-" followed 1128262a0982SChuck Lever * by a transport name and an unsigned 1129262a0982SChuck Lever * integer value representing the port 1130262a0982SChuck Lever * to listen on, separated by whitespace 1131262a0982SChuck Lever * size: non-zero length of C string in @buf 1132262a0982SChuck Lever * Output: 1133262a0982SChuck Lever * On success: returns zero; NFS service no longer listens 1134262a0982SChuck Lever * on that transport 1135262a0982SChuck Lever * On error: return code is a negative errno value 1136262a0982SChuck Lever */ 1137bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 1138bedbdd8bSNeil Brown { 1139bedbdd8bSNeil Brown ssize_t rv; 11403dd98a3bSJeff Layton 1141bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1142bedbdd8bSNeil Brown rv = __write_ports(file, buf, size); 1143bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1144bedbdd8bSNeil Brown return rv; 1145bedbdd8bSNeil Brown } 1146bedbdd8bSNeil Brown 1147bedbdd8bSNeil Brown 1148596bbe53SNeilBrown int nfsd_max_blksize; 1149596bbe53SNeilBrown 1150262a0982SChuck Lever /** 1151262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 1152262a0982SChuck Lever * 1153262a0982SChuck Lever * Input: 1154262a0982SChuck Lever * buf: ignored 1155262a0982SChuck Lever * size: zero 1156262a0982SChuck Lever * 1157262a0982SChuck Lever * OR 1158262a0982SChuck Lever * 1159262a0982SChuck Lever * Input: 1160262a0982SChuck Lever * buf: C string containing an unsigned 1161262a0982SChuck Lever * integer value representing the new 1162262a0982SChuck Lever * NFS blksize 1163262a0982SChuck Lever * size: non-zero length of C string in @buf 1164262a0982SChuck Lever * Output: 1165262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1166262a0982SChuck Lever * containing numeric value of the current NFS blksize 1167262a0982SChuck Lever * setting; 1168262a0982SChuck Lever * return code is the size in bytes of the string 1169262a0982SChuck Lever * On error: return code is zero or a negative errno value 1170262a0982SChuck Lever */ 1171596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 1172596bbe53SNeilBrown { 1173596bbe53SNeilBrown char *mesg = buf; 1174596bbe53SNeilBrown if (size > 0) { 1175596bbe53SNeilBrown int bsize; 1176596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 1177596bbe53SNeilBrown if (rv) 1178596bbe53SNeilBrown return rv; 1179596bbe53SNeilBrown /* force bsize into allowed range and 1180596bbe53SNeilBrown * required alignment. 1181596bbe53SNeilBrown */ 1182596bbe53SNeilBrown if (bsize < 1024) 1183596bbe53SNeilBrown bsize = 1024; 1184596bbe53SNeilBrown if (bsize > NFSSVC_MAXBLKSIZE) 1185596bbe53SNeilBrown bsize = NFSSVC_MAXBLKSIZE; 1186596bbe53SNeilBrown bsize &= ~(1024-1); 1187bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1188596bbe53SNeilBrown if (nfsd_serv && nfsd_serv->sv_nrthreads) { 1189bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1190596bbe53SNeilBrown return -EBUSY; 1191596bbe53SNeilBrown } 1192596bbe53SNeilBrown nfsd_max_blksize = bsize; 1193bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1194596bbe53SNeilBrown } 1195e06b6405SChuck Lever 1196e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 1197e06b6405SChuck Lever nfsd_max_blksize); 1198596bbe53SNeilBrown } 1199596bbe53SNeilBrown 120070c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 12011da177e4SLinus Torvalds extern time_t nfs4_leasetime(void); 12021da177e4SLinus Torvalds 12033dd98a3bSJeff Layton static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) 12041da177e4SLinus Torvalds { 12051da177e4SLinus Torvalds /* if size > 10 seconds, call 12061da177e4SLinus Torvalds * nfs4_reset_lease() then write out the new lease (seconds) as reply 12071da177e4SLinus Torvalds */ 12081da177e4SLinus Torvalds char *mesg = buf; 12093dd98a3bSJeff Layton int rv, lease; 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds if (size > 0) { 12123dd98a3bSJeff Layton if (nfsd_serv) 12133dd98a3bSJeff Layton return -EBUSY; 12141da177e4SLinus Torvalds rv = get_int(&mesg, &lease); 12151da177e4SLinus Torvalds if (rv) 12161da177e4SLinus Torvalds return rv; 12171da177e4SLinus Torvalds if (lease < 10 || lease > 3600) 12181da177e4SLinus Torvalds return -EINVAL; 12191da177e4SLinus Torvalds nfs4_reset_lease(lease); 12201da177e4SLinus Torvalds } 1221e06b6405SChuck Lever 1222e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", 1223e06b6405SChuck Lever nfs4_lease_time()); 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds 1226262a0982SChuck Lever /** 1227262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 1228262a0982SChuck Lever * 1229262a0982SChuck Lever * Input: 1230262a0982SChuck Lever * buf: ignored 1231262a0982SChuck Lever * size: zero 1232262a0982SChuck Lever * 1233262a0982SChuck Lever * OR 1234262a0982SChuck Lever * 1235262a0982SChuck Lever * Input: 1236262a0982SChuck Lever * buf: C string containing an unsigned 1237262a0982SChuck Lever * integer value representing the new 1238262a0982SChuck Lever * NFSv4 lease expiry time 1239262a0982SChuck Lever * size: non-zero length of C string in @buf 1240262a0982SChuck Lever * Output: 1241262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1242262a0982SChuck Lever * string containing unsigned integer value of the 1243262a0982SChuck Lever * current lease expiry time; 1244262a0982SChuck Lever * return code is the size in bytes of the string 1245262a0982SChuck Lever * On error: return code is zero or a negative errno value 1246262a0982SChuck Lever */ 12473dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 12483dd98a3bSJeff Layton { 12493dd98a3bSJeff Layton ssize_t rv; 12503dd98a3bSJeff Layton 12513dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 12523dd98a3bSJeff Layton rv = __write_leasetime(file, buf, size); 12533dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 12543dd98a3bSJeff Layton return rv; 12553dd98a3bSJeff Layton } 12563dd98a3bSJeff Layton 12573dd98a3bSJeff Layton extern char *nfs4_recoverydir(void); 12583dd98a3bSJeff Layton 12593dd98a3bSJeff Layton static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) 12600964a3d3SNeilBrown { 12610964a3d3SNeilBrown char *mesg = buf; 12620964a3d3SNeilBrown char *recdir; 12630964a3d3SNeilBrown int len, status; 12640964a3d3SNeilBrown 12653dd98a3bSJeff Layton if (size > 0) { 12663dd98a3bSJeff Layton if (nfsd_serv) 12673dd98a3bSJeff Layton return -EBUSY; 12683dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 12690964a3d3SNeilBrown return -EINVAL; 12700964a3d3SNeilBrown buf[size-1] = 0; 12710964a3d3SNeilBrown 12720964a3d3SNeilBrown recdir = mesg; 12730964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 12740964a3d3SNeilBrown if (len <= 0) 12750964a3d3SNeilBrown return -EINVAL; 12760964a3d3SNeilBrown 12770964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 12783dd98a3bSJeff Layton } 12793d72ab8fSChuck Lever 12803d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 12813d72ab8fSChuck Lever nfs4_recoverydir()); 12820964a3d3SNeilBrown } 12833dd98a3bSJeff Layton 1284262a0982SChuck Lever /** 1285262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1286262a0982SChuck Lever * 1287262a0982SChuck Lever * Input: 1288262a0982SChuck Lever * buf: ignored 1289262a0982SChuck Lever * size: zero 1290262a0982SChuck Lever * 1291262a0982SChuck Lever * OR 1292262a0982SChuck Lever * 1293262a0982SChuck Lever * Input: 1294262a0982SChuck Lever * buf: C string containing the pathname 1295262a0982SChuck Lever * of the directory on a local file 1296262a0982SChuck Lever * system containing permanent NFSv4 1297262a0982SChuck Lever * recovery data 1298262a0982SChuck Lever * size: non-zero length of C string in @buf 1299262a0982SChuck Lever * Output: 1300262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1301262a0982SChuck Lever * containing the current recovery pathname setting; 1302262a0982SChuck Lever * return code is the size in bytes of the string 1303262a0982SChuck Lever * On error: return code is zero or a negative errno value 1304262a0982SChuck Lever */ 13053dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 13063dd98a3bSJeff Layton { 13073dd98a3bSJeff Layton ssize_t rv; 13083dd98a3bSJeff Layton 13093dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 13103dd98a3bSJeff Layton rv = __write_recoverydir(file, buf, size); 13113dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 13123dd98a3bSJeff Layton return rv; 13133dd98a3bSJeff Layton } 13143dd98a3bSJeff Layton 131570c3b76cSNeilBrown #endif 13160964a3d3SNeilBrown 13171da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 13181da177e4SLinus Torvalds /* 13191da177e4SLinus Torvalds * populating the filesystem. 13201da177e4SLinus Torvalds */ 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 13231da177e4SLinus Torvalds { 13241da177e4SLinus Torvalds static struct tree_descr nfsd_files[] = { 13251da177e4SLinus Torvalds [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 13261da177e4SLinus Torvalds [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 13271da177e4SLinus Torvalds [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 13281da177e4SLinus Torvalds [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 13291da177e4SLinus Torvalds [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 13301da177e4SLinus Torvalds [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 13311da177e4SLinus Torvalds [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 13321da177e4SLinus Torvalds [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 13334373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13344373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 133517efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 133617efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13371da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13381da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1339eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 134003cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 134170c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 134280212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1343596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 13441da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 13451da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 13460964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 13471da177e4SLinus Torvalds #endif 13481da177e4SLinus Torvalds /* last one */ {""} 13491da177e4SLinus Torvalds }; 13501da177e4SLinus Torvalds return simple_fill_super(sb, 0x6e667364, nfsd_files); 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds 1353454e2398SDavid Howells static int nfsd_get_sb(struct file_system_type *fs_type, 1354454e2398SDavid Howells int flags, const char *dev_name, void *data, struct vfsmount *mnt) 13551da177e4SLinus Torvalds { 1356454e2398SDavid Howells return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); 13571da177e4SLinus Torvalds } 13581da177e4SLinus Torvalds 13591da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 13601da177e4SLinus Torvalds .owner = THIS_MODULE, 13611da177e4SLinus Torvalds .name = "nfsd", 13621da177e4SLinus Torvalds .get_sb = nfsd_get_sb, 13631da177e4SLinus Torvalds .kill_sb = kill_litter_super, 13641da177e4SLinus Torvalds }; 13651da177e4SLinus Torvalds 1366e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1367e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1368e331f606SJ. Bruce Fields { 1369e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1370e331f606SJ. Bruce Fields 1371e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1372e331f606SJ. Bruce Fields if (!entry) 1373e331f606SJ. Bruce Fields return -ENOMEM; 13749ef2db26SDenis V. Lunev entry = proc_create("exports", 0, entry, &exports_operations); 1375e331f606SJ. Bruce Fields if (!entry) 1376e331f606SJ. Bruce Fields return -ENOMEM; 1377e331f606SJ. Bruce Fields return 0; 1378e331f606SJ. Bruce Fields } 1379e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1380e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1381e331f606SJ. Bruce Fields { 1382e331f606SJ. Bruce Fields return 0; 1383e331f606SJ. Bruce Fields } 1384e331f606SJ. Bruce Fields #endif 1385e331f606SJ. Bruce Fields 13861da177e4SLinus Torvalds static int __init init_nfsd(void) 13871da177e4SLinus Torvalds { 13881da177e4SLinus Torvalds int retval; 13891da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 13901da177e4SLinus Torvalds 1391e8ff2a84SJ. Bruce Fields retval = nfs4_state_init(); /* nfs4 locking state */ 1392e8ff2a84SJ. Bruce Fields if (retval) 1393e8ff2a84SJ. Bruce Fields return retval; 13941da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1395d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1396d5c3428bSJ. Bruce Fields if (retval) 1397d5c3428bSJ. Bruce Fields goto out_free_stat; 1398dbf847ecSJ. Bruce Fields retval = nfsd_export_init(); 1399dbf847ecSJ. Bruce Fields if (retval) 1400dbf847ecSJ. Bruce Fields goto out_free_cache; 14011da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1402dbf847ecSJ. Bruce Fields retval = nfsd_idmap_init(); 1403dbf847ecSJ. Bruce Fields if (retval) 1404dbf847ecSJ. Bruce Fields goto out_free_lockd; 1405e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1406e331f606SJ. Bruce Fields if (retval) 1407e331f606SJ. Bruce Fields goto out_free_idmap; 14081da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 140926808d3fSJ. Bruce Fields if (retval) 141026808d3fSJ. Bruce Fields goto out_free_all; 141126808d3fSJ. Bruce Fields return 0; 141226808d3fSJ. Bruce Fields out_free_all: 14131da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14141da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1415e331f606SJ. Bruce Fields out_free_idmap: 1416dbf847ecSJ. Bruce Fields nfsd_idmap_shutdown(); 1417dbf847ecSJ. Bruce Fields out_free_lockd: 14181da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1419e331f606SJ. Bruce Fields nfsd_export_shutdown(); 1420dbf847ecSJ. Bruce Fields out_free_cache: 1421e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1422d5c3428bSJ. Bruce Fields out_free_stat: 1423d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 142446b25895SJ. Bruce Fields nfsd4_free_slabs(); 14251da177e4SLinus Torvalds return retval; 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds static void __exit exit_nfsd(void) 14291da177e4SLinus Torvalds { 14301da177e4SLinus Torvalds nfsd_export_shutdown(); 1431d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 14321da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14331da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 14341da177e4SLinus Torvalds nfsd_stat_shutdown(); 14351da177e4SLinus Torvalds nfsd_lockd_shutdown(); 14361da177e4SLinus Torvalds nfsd_idmap_shutdown(); 1437e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 14381da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 14391da177e4SLinus Torvalds } 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 14421da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 14431da177e4SLinus Torvalds module_init(init_nfsd) 14441da177e4SLinus Torvalds module_exit(exit_nfsd) 1445