11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Syscall interface to knfsd. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 75a0e3ad6STejun Heo #include <linux/slab.h> 83f8206d4SAl Viro #include <linux/namei.h> 9b41b66d6SNeilBrown #include <linux/ctype.h> 101da177e4SLinus Torvalds 1180212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 121da177e4SLinus Torvalds #include <linux/nfsd/syscall.h> 134373ea84SWendy Cheng #include <linux/lockd/lockd.h> 144116092bSChuck Lever #include <linux/sunrpc/clnt.h> 151da177e4SLinus Torvalds 16*2ca72e17SJ. Bruce Fields #include "idmap.h" 179a74af21SBoaz Harrosh #include "nfsd.h" 189a74af21SBoaz Harrosh #include "cache.h" 199a74af21SBoaz Harrosh 201da177e4SLinus Torvalds /* 211da177e4SLinus Torvalds * We have a single directory with 9 nodes in it. 221da177e4SLinus Torvalds */ 231da177e4SLinus Torvalds enum { 241da177e4SLinus Torvalds NFSD_Root = 1, 251e140567SNeilBrown #ifdef CONFIG_NFSD_DEPRECATED 261da177e4SLinus Torvalds NFSD_Svc, 271da177e4SLinus Torvalds NFSD_Add, 281da177e4SLinus Torvalds NFSD_Del, 291da177e4SLinus Torvalds NFSD_Export, 301da177e4SLinus Torvalds NFSD_Unexport, 311da177e4SLinus Torvalds NFSD_Getfd, 321da177e4SLinus Torvalds NFSD_Getfs, 331e140567SNeilBrown #endif 341da177e4SLinus Torvalds NFSD_List, 35e8e8753fSJ. Bruce Fields NFSD_Export_features, 361da177e4SLinus Torvalds NFSD_Fh, 374373ea84SWendy Cheng NFSD_FO_UnlockIP, 3817efa372SWendy Cheng NFSD_FO_UnlockFS, 391da177e4SLinus Torvalds NFSD_Threads, 40eed2965aSGreg Banks NFSD_Pool_Threads, 4103cf6c9fSGreg Banks NFSD_Pool_Stats, 4270c3b76cSNeilBrown NFSD_Versions, 4380212d59SNeilBrown NFSD_Ports, 44596bbe53SNeilBrown NFSD_MaxBlkSize, 4570c3b76cSNeilBrown /* 4670c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4770c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 4870c3b76cSNeilBrown */ 4970c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 501da177e4SLinus Torvalds NFSD_Leasetime, 51efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 520964a3d3SNeilBrown NFSD_RecoveryDir, 5370c3b76cSNeilBrown #endif 541da177e4SLinus Torvalds }; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds /* 571da177e4SLinus Torvalds * write() for these nodes. 581da177e4SLinus Torvalds */ 591e140567SNeilBrown #ifdef CONFIG_NFSD_DEPRECATED 601da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size); 611da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size); 621da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size); 631da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size); 641da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size); 651da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size); 661da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size); 671e140567SNeilBrown #endif 681da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 69b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 70b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 711da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 72eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 7370c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 7480212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 75596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 7670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 771da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 78efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 790964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 8070c3b76cSNeilBrown #endif 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 831e140567SNeilBrown #ifdef CONFIG_NFSD_DEPRECATED 841da177e4SLinus Torvalds [NFSD_Svc] = write_svc, 851da177e4SLinus Torvalds [NFSD_Add] = write_add, 861da177e4SLinus Torvalds [NFSD_Del] = write_del, 871da177e4SLinus Torvalds [NFSD_Export] = write_export, 881da177e4SLinus Torvalds [NFSD_Unexport] = write_unexport, 891da177e4SLinus Torvalds [NFSD_Getfd] = write_getfd, 901da177e4SLinus Torvalds [NFSD_Getfs] = write_getfs, 911e140567SNeilBrown #endif 921da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 93b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 94b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 951da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 96eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 9770c3b76cSNeilBrown [NFSD_Versions] = write_versions, 9880212d59SNeilBrown [NFSD_Ports] = write_ports, 99596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 10070c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 1011da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 102efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 1030964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 10470c3b76cSNeilBrown #endif 1051da177e4SLinus Torvalds }; 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1081da177e4SLinus Torvalds { 1097eaa36e2SJosef "Jeff" Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 1101da177e4SLinus Torvalds char *data; 1111da177e4SLinus Torvalds ssize_t rv; 1121da177e4SLinus Torvalds 113e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1141da177e4SLinus Torvalds return -EINVAL; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1171da177e4SLinus Torvalds if (IS_ERR(data)) 1181da177e4SLinus Torvalds return PTR_ERR(data); 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1218971a101SNeilBrown if (rv >= 0) { 1221da177e4SLinus Torvalds simple_transaction_set(file, rv); 1231da177e4SLinus Torvalds rv = size; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds return rv; 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds 1287390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1297390022dSNeilBrown { 1305b6a599fSbookjovi@gmail.com #ifdef CONFIG_NFSD_DEPRECATED 131c67874f9SNeilBrown static int warned; 132c67874f9SNeilBrown if (file->f_dentry->d_name.name[0] == '.' && !warned) { 133c67874f9SNeilBrown printk(KERN_INFO 134c67874f9SNeilBrown "Warning: \"%s\" uses deprecated NFSD interface: %s." 135c67874f9SNeilBrown " This will be removed in 2.6.40\n", 136049ef27bSPavel Emelyanov current->comm, file->f_dentry->d_name.name); 137c67874f9SNeilBrown warned = 1; 138c67874f9SNeilBrown } 1395b6a599fSbookjovi@gmail.com #endif 1407390022dSNeilBrown if (! file->private_data) { 1417390022dSNeilBrown /* An attempt to read a transaction file without writing 1427390022dSNeilBrown * causes a 0-byte write so that the file can return 1437390022dSNeilBrown * state information 1447390022dSNeilBrown */ 1457390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1467390022dSNeilBrown if (rv < 0) 1477390022dSNeilBrown return rv; 1487390022dSNeilBrown } 1497390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1507390022dSNeilBrown } 1517390022dSNeilBrown 1524b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1531da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1547390022dSNeilBrown .read = nfsctl_transaction_read, 1551da177e4SLinus Torvalds .release = simple_transaction_release, 1566038f373SArnd Bergmann .llseek = default_llseek, 1571da177e4SLinus Torvalds }; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds static int exports_open(struct inode *inode, struct file *file) 1601da177e4SLinus Torvalds { 1611da177e4SLinus Torvalds return seq_open(file, &nfs_exports_op); 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds 1644b6f5d20SArjan van de Ven static const struct file_operations exports_operations = { 1651da177e4SLinus Torvalds .open = exports_open, 1661da177e4SLinus Torvalds .read = seq_read, 1671da177e4SLinus Torvalds .llseek = seq_lseek, 1681da177e4SLinus Torvalds .release = seq_release, 1699ef2db26SDenis V. Lunev .owner = THIS_MODULE, 1701da177e4SLinus Torvalds }; 1711da177e4SLinus Torvalds 172e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 173e8e8753fSJ. Bruce Fields { 174e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 175e8e8753fSJ. Bruce Fields return 0; 176e8e8753fSJ. Bruce Fields } 177e8e8753fSJ. Bruce Fields 178e8e8753fSJ. Bruce Fields static int export_features_open(struct inode *inode, struct file *file) 179e8e8753fSJ. Bruce Fields { 180e8e8753fSJ. Bruce Fields return single_open(file, export_features_show, NULL); 181e8e8753fSJ. Bruce Fields } 182e8e8753fSJ. Bruce Fields 183e8e8753fSJ. Bruce Fields static struct file_operations export_features_operations = { 184e8e8753fSJ. Bruce Fields .open = export_features_open, 185e8e8753fSJ. Bruce Fields .read = seq_read, 186e8e8753fSJ. Bruce Fields .llseek = seq_lseek, 187e8e8753fSJ. Bruce Fields .release = single_release, 188e8e8753fSJ. Bruce Fields }; 189e8e8753fSJ. Bruce Fields 19003cf6c9fSGreg Banks extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); 191ed2d8aedSRyusei Yamaguchi extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); 19203cf6c9fSGreg Banks 193828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 19403cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 19503cf6c9fSGreg Banks .read = seq_read, 19603cf6c9fSGreg Banks .llseek = seq_lseek, 197ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 19803cf6c9fSGreg Banks .owner = THIS_MODULE, 19903cf6c9fSGreg Banks }; 20003cf6c9fSGreg Banks 2011da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 2021da177e4SLinus Torvalds /* 2031da177e4SLinus Torvalds * payload - write methods 2041da177e4SLinus Torvalds */ 2051da177e4SLinus Torvalds 2061e140567SNeilBrown #ifdef CONFIG_NFSD_DEPRECATED 207262a0982SChuck Lever /** 208262a0982SChuck Lever * write_svc - Start kernel's NFSD server 209262a0982SChuck Lever * 210262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/threads is preferred. 211262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 212262a0982SChuck Lever * 213262a0982SChuck Lever * Input: 214262a0982SChuck Lever * buf: struct nfsctl_svc 215262a0982SChuck Lever * svc_port: port number of this 216262a0982SChuck Lever * server's listener 217262a0982SChuck Lever * svc_nthreads: number of threads to start 218262a0982SChuck Lever * size: size in bytes of passed in nfsctl_svc 219262a0982SChuck Lever * Output: 220262a0982SChuck Lever * On success: returns zero 221262a0982SChuck Lever * On error: return code is negative errno value 222262a0982SChuck Lever */ 2231da177e4SLinus Torvalds static ssize_t write_svc(struct file *file, char *buf, size_t size) 2241da177e4SLinus Torvalds { 2251da177e4SLinus Torvalds struct nfsctl_svc *data; 22682e12fe9SNeilBrown int err; 2271da177e4SLinus Torvalds if (size < sizeof(*data)) 2281da177e4SLinus Torvalds return -EINVAL; 2291da177e4SLinus Torvalds data = (struct nfsctl_svc*) buf; 23082e12fe9SNeilBrown err = nfsd_svc(data->svc_port, data->svc_nthreads); 23182e12fe9SNeilBrown if (err < 0) 23282e12fe9SNeilBrown return err; 23382e12fe9SNeilBrown return 0; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 236262a0982SChuck Lever /** 237262a0982SChuck Lever * write_add - Add or modify client entry in auth unix cache 238262a0982SChuck Lever * 239262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 240262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 241262a0982SChuck Lever * 242262a0982SChuck Lever * Input: 243262a0982SChuck Lever * buf: struct nfsctl_client 244262a0982SChuck Lever * cl_ident: '\0'-terminated C string 245262a0982SChuck Lever * containing domain name 246262a0982SChuck Lever * of client 247262a0982SChuck Lever * cl_naddr: no. of items in cl_addrlist 248262a0982SChuck Lever * cl_addrlist: array of client addresses 249262a0982SChuck Lever * cl_fhkeytype: ignored 250262a0982SChuck Lever * cl_fhkeylen: ignored 251262a0982SChuck Lever * cl_fhkey: ignored 252262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 253262a0982SChuck Lever * Output: 254262a0982SChuck Lever * On success: returns zero 255262a0982SChuck Lever * On error: return code is negative errno value 256262a0982SChuck Lever * 257262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 258262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 259262a0982SChuck Lever */ 2601da177e4SLinus Torvalds static ssize_t write_add(struct file *file, char *buf, size_t size) 2611da177e4SLinus Torvalds { 2621da177e4SLinus Torvalds struct nfsctl_client *data; 2631da177e4SLinus Torvalds if (size < sizeof(*data)) 2641da177e4SLinus Torvalds return -EINVAL; 2651da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2661da177e4SLinus Torvalds return exp_addclient(data); 2671da177e4SLinus Torvalds } 2681da177e4SLinus Torvalds 269262a0982SChuck Lever /** 270262a0982SChuck Lever * write_del - Remove client from auth unix cache 271262a0982SChuck Lever * 272262a0982SChuck Lever * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 273262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 274262a0982SChuck Lever * 275262a0982SChuck Lever * Input: 276262a0982SChuck Lever * buf: struct nfsctl_client 277262a0982SChuck Lever * cl_ident: '\0'-terminated C string 278262a0982SChuck Lever * containing domain name 279262a0982SChuck Lever * of client 280262a0982SChuck Lever * cl_naddr: ignored 281262a0982SChuck Lever * cl_addrlist: ignored 282262a0982SChuck Lever * cl_fhkeytype: ignored 283262a0982SChuck Lever * cl_fhkeylen: ignored 284262a0982SChuck Lever * cl_fhkey: ignored 285262a0982SChuck Lever * size: size in bytes of passed in nfsctl_client 286262a0982SChuck Lever * Output: 287262a0982SChuck Lever * On success: returns zero 288262a0982SChuck Lever * On error: return code is negative errno value 289262a0982SChuck Lever * 290262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since 291262a0982SChuck Lever * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 292262a0982SChuck Lever */ 2931da177e4SLinus Torvalds static ssize_t write_del(struct file *file, char *buf, size_t size) 2941da177e4SLinus Torvalds { 2951da177e4SLinus Torvalds struct nfsctl_client *data; 2961da177e4SLinus Torvalds if (size < sizeof(*data)) 2971da177e4SLinus Torvalds return -EINVAL; 2981da177e4SLinus Torvalds data = (struct nfsctl_client *)buf; 2991da177e4SLinus Torvalds return exp_delclient(data); 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 302262a0982SChuck Lever /** 303262a0982SChuck Lever * write_export - Export part or all of a local file system 304262a0982SChuck Lever * 305262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 306262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 307262a0982SChuck Lever * 308262a0982SChuck Lever * Input: 309262a0982SChuck Lever * buf: struct nfsctl_export 310262a0982SChuck Lever * ex_client: '\0'-terminated C string 311262a0982SChuck Lever * containing domain name 312262a0982SChuck Lever * of client allowed to access 313262a0982SChuck Lever * this export 314262a0982SChuck Lever * ex_path: '\0'-terminated C string 315262a0982SChuck Lever * containing pathname of 316262a0982SChuck Lever * directory in local file system 317262a0982SChuck Lever * ex_dev: fsid to use for this export 318262a0982SChuck Lever * ex_ino: ignored 319262a0982SChuck Lever * ex_flags: export flags for this export 320262a0982SChuck Lever * ex_anon_uid: UID to use for anonymous 321262a0982SChuck Lever * requests 322262a0982SChuck Lever * ex_anon_gid: GID to use for anonymous 323262a0982SChuck Lever * requests 324262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 325262a0982SChuck Lever * Output: 326262a0982SChuck Lever * On success: returns zero 327262a0982SChuck Lever * On error: return code is negative errno value 328262a0982SChuck Lever */ 3291da177e4SLinus Torvalds static ssize_t write_export(struct file *file, char *buf, size_t size) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds struct nfsctl_export *data; 3321da177e4SLinus Torvalds if (size < sizeof(*data)) 3331da177e4SLinus Torvalds return -EINVAL; 3341da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3351da177e4SLinus Torvalds return exp_export(data); 3361da177e4SLinus Torvalds } 3371da177e4SLinus Torvalds 338262a0982SChuck Lever /** 339262a0982SChuck Lever * write_unexport - Unexport a previously exported file system 340262a0982SChuck Lever * 341262a0982SChuck Lever * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 342262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 343262a0982SChuck Lever * 344262a0982SChuck Lever * Input: 345262a0982SChuck Lever * buf: struct nfsctl_export 346262a0982SChuck Lever * ex_client: '\0'-terminated C string 347262a0982SChuck Lever * containing domain name 348262a0982SChuck Lever * of client no longer allowed 349262a0982SChuck Lever * to access this export 350262a0982SChuck Lever * ex_path: '\0'-terminated C string 351262a0982SChuck Lever * containing pathname of 352262a0982SChuck Lever * directory in local file system 353262a0982SChuck Lever * ex_dev: ignored 354262a0982SChuck Lever * ex_ino: ignored 355262a0982SChuck Lever * ex_flags: ignored 356262a0982SChuck Lever * ex_anon_uid: ignored 357262a0982SChuck Lever * ex_anon_gid: ignored 358262a0982SChuck Lever * size: size in bytes of passed in nfsctl_export 359262a0982SChuck Lever * Output: 360262a0982SChuck Lever * On success: returns zero 361262a0982SChuck Lever * On error: return code is negative errno value 362262a0982SChuck Lever */ 3631da177e4SLinus Torvalds static ssize_t write_unexport(struct file *file, char *buf, size_t size) 3641da177e4SLinus Torvalds { 3651da177e4SLinus Torvalds struct nfsctl_export *data; 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds if (size < sizeof(*data)) 3681da177e4SLinus Torvalds return -EINVAL; 3691da177e4SLinus Torvalds data = (struct nfsctl_export*)buf; 3701da177e4SLinus Torvalds return exp_unexport(data); 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds 373262a0982SChuck Lever /** 374262a0982SChuck Lever * write_getfs - Get a variable-length NFS file handle by path 375262a0982SChuck Lever * 376262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 377262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 378262a0982SChuck Lever * 379262a0982SChuck Lever * Input: 380262a0982SChuck Lever * buf: struct nfsctl_fsparm 381262a0982SChuck Lever * gd_addr: socket address of client 382262a0982SChuck Lever * gd_path: '\0'-terminated C string 383262a0982SChuck Lever * containing pathname of 384262a0982SChuck Lever * directory in local file system 385262a0982SChuck Lever * gd_maxlen: maximum size of returned file 386262a0982SChuck Lever * handle 387262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fsparm 388262a0982SChuck Lever * Output: 389262a0982SChuck Lever * On success: passed-in buffer filled with a knfsd_fh structure 390262a0982SChuck Lever * (a variable-length raw NFS file handle); 391262a0982SChuck Lever * return code is the size in bytes of the file handle 392262a0982SChuck Lever * On error: return code is negative errno value 393262a0982SChuck Lever * 394262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 395262a0982SChuck Lever * is the same size as a struct sockaddr_in. 396262a0982SChuck Lever */ 3971da177e4SLinus Torvalds static ssize_t write_getfs(struct file *file, char *buf, size_t size) 3981da177e4SLinus Torvalds { 3991da177e4SLinus Torvalds struct nfsctl_fsparm *data; 4001da177e4SLinus Torvalds struct sockaddr_in *sin; 4011da177e4SLinus Torvalds struct auth_domain *clp; 4021da177e4SLinus Torvalds int err = 0; 4031da177e4SLinus Torvalds struct knfsd_fh *res; 404f15364bdSAurélien Charbon struct in6_addr in6; 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds if (size < sizeof(*data)) 4071da177e4SLinus Torvalds return -EINVAL; 4081da177e4SLinus Torvalds data = (struct nfsctl_fsparm*)buf; 4091da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 4101da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 4111da177e4SLinus Torvalds goto out; 4121da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 4131da177e4SLinus Torvalds if (data->gd_maxlen > NFS3_FHSIZE) 4141da177e4SLinus Torvalds data->gd_maxlen = NFS3_FHSIZE; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds res = (struct knfsd_fh*)buf; 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds exp_readlock(); 419f15364bdSAurélien Charbon 420f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 421f15364bdSAurélien Charbon 422352114f3SPavel Emelyanov clp = auth_unix_lookup(&init_net, &in6); 423f15364bdSAurélien Charbon if (!clp) 4241da177e4SLinus Torvalds err = -EPERM; 4251da177e4SLinus Torvalds else { 4261da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); 4271da177e4SLinus Torvalds auth_domain_put(clp); 4281da177e4SLinus Torvalds } 4291da177e4SLinus Torvalds exp_readunlock(); 4301da177e4SLinus Torvalds if (err == 0) 43112127498SAndrew Morton err = res->fh_size + offsetof(struct knfsd_fh, fh_base); 4321da177e4SLinus Torvalds out: 4331da177e4SLinus Torvalds return err; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds 436262a0982SChuck Lever /** 437262a0982SChuck Lever * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) 438262a0982SChuck Lever * 439262a0982SChuck Lever * Deprecated. /proc/fs/nfsd/filehandle is preferred. 440262a0982SChuck Lever * Function remains to support old versions of nfs-utils. 441262a0982SChuck Lever * 442262a0982SChuck Lever * Input: 443262a0982SChuck Lever * buf: struct nfsctl_fdparm 444262a0982SChuck Lever * gd_addr: socket address of client 445262a0982SChuck Lever * gd_path: '\0'-terminated C string 446262a0982SChuck Lever * containing pathname of 447262a0982SChuck Lever * directory in local file system 448262a0982SChuck Lever * gd_version: fdparm structure version 449262a0982SChuck Lever * size: size in bytes of passed in nfsctl_fdparm 450262a0982SChuck Lever * Output: 451262a0982SChuck Lever * On success: passed-in buffer filled with nfsctl_res 452262a0982SChuck Lever * (a fixed-length raw NFS file handle); 453262a0982SChuck Lever * return code is the size in bytes of the file handle 454262a0982SChuck Lever * On error: return code is negative errno value 455262a0982SChuck Lever * 456262a0982SChuck Lever * Note: Only AF_INET client addresses are passed in, since gd_addr 457262a0982SChuck Lever * is the same size as a struct sockaddr_in. 458262a0982SChuck Lever */ 4591da177e4SLinus Torvalds static ssize_t write_getfd(struct file *file, char *buf, size_t size) 4601da177e4SLinus Torvalds { 4611da177e4SLinus Torvalds struct nfsctl_fdparm *data; 4621da177e4SLinus Torvalds struct sockaddr_in *sin; 4631da177e4SLinus Torvalds struct auth_domain *clp; 4641da177e4SLinus Torvalds int err = 0; 4651da177e4SLinus Torvalds struct knfsd_fh fh; 4661da177e4SLinus Torvalds char *res; 467f15364bdSAurélien Charbon struct in6_addr in6; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds if (size < sizeof(*data)) 4701da177e4SLinus Torvalds return -EINVAL; 4711da177e4SLinus Torvalds data = (struct nfsctl_fdparm*)buf; 4721da177e4SLinus Torvalds err = -EPROTONOSUPPORT; 4731da177e4SLinus Torvalds if (data->gd_addr.sa_family != AF_INET) 4741da177e4SLinus Torvalds goto out; 4751da177e4SLinus Torvalds err = -EINVAL; 4761da177e4SLinus Torvalds if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) 4771da177e4SLinus Torvalds goto out; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds res = buf; 4801da177e4SLinus Torvalds sin = (struct sockaddr_in *)&data->gd_addr; 4811da177e4SLinus Torvalds exp_readlock(); 482f15364bdSAurélien Charbon 483f15364bdSAurélien Charbon ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 484f15364bdSAurélien Charbon 485352114f3SPavel Emelyanov clp = auth_unix_lookup(&init_net, &in6); 486f15364bdSAurélien Charbon if (!clp) 4871da177e4SLinus Torvalds err = -EPERM; 4881da177e4SLinus Torvalds else { 4891da177e4SLinus Torvalds err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); 4901da177e4SLinus Torvalds auth_domain_put(clp); 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds exp_readunlock(); 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds if (err == 0) { 4951da177e4SLinus Torvalds memset(res,0, NFS_FHSIZE); 4961da177e4SLinus Torvalds memcpy(res, &fh.fh_base, fh.fh_size); 4971da177e4SLinus Torvalds err = NFS_FHSIZE; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds out: 5001da177e4SLinus Torvalds return err; 5011da177e4SLinus Torvalds } 5021e140567SNeilBrown #endif /* CONFIG_NFSD_DEPRECATED */ 5031da177e4SLinus Torvalds 504262a0982SChuck Lever /** 505262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 506262a0982SChuck Lever * 507262a0982SChuck Lever * Experimental. 508262a0982SChuck Lever * 509262a0982SChuck Lever * Input: 510262a0982SChuck Lever * buf: '\n'-terminated C string containing a 5114116092bSChuck Lever * presentation format IP address 512262a0982SChuck Lever * size: length of C string in @buf 513262a0982SChuck Lever * Output: 514262a0982SChuck Lever * On success: returns zero if all specified locks were released; 515262a0982SChuck Lever * returns one if one or more locks were not released 516262a0982SChuck Lever * On error: return code is negative errno value 517262a0982SChuck Lever */ 518b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 5194373ea84SWendy Cheng { 5204116092bSChuck Lever struct sockaddr_storage address; 5214116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 5224116092bSChuck Lever size_t salen = sizeof(address); 523367c8c7bSChuck Lever char *fo_path; 5244373ea84SWendy Cheng 5254373ea84SWendy Cheng /* sanity check */ 5264373ea84SWendy Cheng if (size == 0) 5274373ea84SWendy Cheng return -EINVAL; 5284373ea84SWendy Cheng 5294373ea84SWendy Cheng if (buf[size-1] != '\n') 5304373ea84SWendy Cheng return -EINVAL; 5314373ea84SWendy Cheng 5324373ea84SWendy Cheng fo_path = buf; 5334373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 5344373ea84SWendy Cheng return -EINVAL; 5354373ea84SWendy Cheng 5364116092bSChuck Lever if (rpc_pton(fo_path, size, sap, salen) == 0) 5374373ea84SWendy Cheng return -EINVAL; 5384373ea84SWendy Cheng 5394116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 5404373ea84SWendy Cheng } 5414373ea84SWendy Cheng 542262a0982SChuck Lever /** 543262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 544262a0982SChuck Lever * 545262a0982SChuck Lever * Experimental. 546262a0982SChuck Lever * 547262a0982SChuck Lever * Input: 548262a0982SChuck Lever * buf: '\n'-terminated C string containing the 549262a0982SChuck Lever * absolute pathname of a local file system 550262a0982SChuck Lever * size: length of C string in @buf 551262a0982SChuck Lever * Output: 552262a0982SChuck Lever * On success: returns zero if all specified locks were released; 553262a0982SChuck Lever * returns one if one or more locks were not released 554262a0982SChuck Lever * On error: return code is negative errno value 555262a0982SChuck Lever */ 556b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 55717efa372SWendy Cheng { 558a63bb996SAl Viro struct path path; 55917efa372SWendy Cheng char *fo_path; 56017efa372SWendy Cheng int error; 56117efa372SWendy Cheng 56217efa372SWendy Cheng /* sanity check */ 56317efa372SWendy Cheng if (size == 0) 56417efa372SWendy Cheng return -EINVAL; 56517efa372SWendy Cheng 56617efa372SWendy Cheng if (buf[size-1] != '\n') 56717efa372SWendy Cheng return -EINVAL; 56817efa372SWendy Cheng 56917efa372SWendy Cheng fo_path = buf; 57017efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 57117efa372SWendy Cheng return -EINVAL; 57217efa372SWendy Cheng 573a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 57417efa372SWendy Cheng if (error) 57517efa372SWendy Cheng return error; 57617efa372SWendy Cheng 577262a0982SChuck Lever /* 578262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 579262a0982SChuck Lever * releasing locks on the wrong file system. 580262a0982SChuck Lever * 581262a0982SChuck Lever * For example: 582262a0982SChuck Lever * 1. Does the path refer to a directory? 583262a0982SChuck Lever * 2. Is that directory a mount point, or 584262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 585262a0982SChuck Lever */ 586a63bb996SAl Viro error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); 58717efa372SWendy Cheng 588a63bb996SAl Viro path_put(&path); 58917efa372SWendy Cheng return error; 59017efa372SWendy Cheng } 59117efa372SWendy Cheng 592262a0982SChuck Lever /** 593262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 594262a0982SChuck Lever * 595262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 596262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 597262a0982SChuck Lever * contain escape sequences. 598262a0982SChuck Lever * 599262a0982SChuck Lever * Input: 600262a0982SChuck Lever * buf: 601262a0982SChuck Lever * domain: client domain name 602262a0982SChuck Lever * path: export pathname 603262a0982SChuck Lever * maxsize: numeric maximum size of 604262a0982SChuck Lever * @buf 605262a0982SChuck Lever * size: length of C string in @buf 606262a0982SChuck Lever * Output: 607262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 608262a0982SChuck Lever * string containing a ASCII hex text version 609262a0982SChuck Lever * of the NFS file handle; 610262a0982SChuck Lever * return code is the size in bytes of the string 611262a0982SChuck Lever * On error: return code is negative errno value 612262a0982SChuck Lever */ 6131da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 6141da177e4SLinus Torvalds { 6151da177e4SLinus Torvalds char *dname, *path; 616246d95baSAndrew Morton int uninitialized_var(maxsize); 6171da177e4SLinus Torvalds char *mesg = buf; 6181da177e4SLinus Torvalds int len; 6191da177e4SLinus Torvalds struct auth_domain *dom; 6201da177e4SLinus Torvalds struct knfsd_fh fh; 6211da177e4SLinus Torvalds 62287d26ea7SJ. Bruce Fields if (size == 0) 62387d26ea7SJ. Bruce Fields return -EINVAL; 62487d26ea7SJ. Bruce Fields 6251da177e4SLinus Torvalds if (buf[size-1] != '\n') 6261da177e4SLinus Torvalds return -EINVAL; 6271da177e4SLinus Torvalds buf[size-1] = 0; 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds dname = mesg; 6301da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 63154224f04SChuck Lever if (len <= 0) 63254224f04SChuck Lever return -EINVAL; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds path = dname+len+1; 6351da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 63654224f04SChuck Lever if (len <= 0) 63754224f04SChuck Lever return -EINVAL; 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 6401da177e4SLinus Torvalds if (len) 6411da177e4SLinus Torvalds return len; 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 6441da177e4SLinus Torvalds return -EINVAL; 6451da177e4SLinus Torvalds if (maxsize > NFS3_FHSIZE) 6461da177e4SLinus Torvalds maxsize = NFS3_FHSIZE; 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 6491da177e4SLinus Torvalds return -EINVAL; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 6521da177e4SLinus Torvalds dom = unix_domain_find(dname); 6531da177e4SLinus Torvalds if (!dom) 6541da177e4SLinus Torvalds return -ENOMEM; 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds len = exp_rootfh(dom, path, &fh, maxsize); 6571da177e4SLinus Torvalds auth_domain_put(dom); 6581da177e4SLinus Torvalds if (len) 6591da177e4SLinus Torvalds return len; 6601da177e4SLinus Torvalds 66154224f04SChuck Lever mesg = buf; 66254224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 6631da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 6641da177e4SLinus Torvalds mesg[-1] = '\n'; 6651da177e4SLinus Torvalds return mesg - buf; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds 668262a0982SChuck Lever /** 669262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 670262a0982SChuck Lever * 671262a0982SChuck Lever * Input: 672262a0982SChuck Lever * buf: ignored 673262a0982SChuck Lever * size: zero 674262a0982SChuck Lever * Output: 675262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 676262a0982SChuck Lever * string numeric value representing the number of 677262a0982SChuck Lever * running NFSD threads; 678262a0982SChuck Lever * return code is the size in bytes of the string 679262a0982SChuck Lever * On error: return code is zero 680262a0982SChuck Lever * 681262a0982SChuck Lever * OR 682262a0982SChuck Lever * 683262a0982SChuck Lever * Input: 684262a0982SChuck Lever * buf: C string containing an unsigned 685262a0982SChuck Lever * integer value representing the 686262a0982SChuck Lever * number of NFSD threads to start 687262a0982SChuck Lever * size: non-zero length of C string in @buf 688262a0982SChuck Lever * Output: 689262a0982SChuck Lever * On success: NFS service is started; 690262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 691262a0982SChuck Lever * string numeric value representing the number of 692262a0982SChuck Lever * running NFSD threads; 693262a0982SChuck Lever * return code is the size in bytes of the string 694262a0982SChuck Lever * On error: return code is zero or a negative errno value 695262a0982SChuck Lever */ 6961da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 6971da177e4SLinus Torvalds { 6981da177e4SLinus Torvalds char *mesg = buf; 6991da177e4SLinus Torvalds int rv; 7001da177e4SLinus Torvalds if (size > 0) { 7011da177e4SLinus Torvalds int newthreads; 7021da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 7031da177e4SLinus Torvalds if (rv) 7041da177e4SLinus Torvalds return rv; 7051da177e4SLinus Torvalds if (newthreads < 0) 7061da177e4SLinus Torvalds return -EINVAL; 7079e074856SChuck Lever rv = nfsd_svc(NFS_PORT, newthreads); 70882e12fe9SNeilBrown if (rv < 0) 7091da177e4SLinus Torvalds return rv; 71082e12fe9SNeilBrown } else 71182e12fe9SNeilBrown rv = nfsd_nrthreads(); 712e06b6405SChuck Lever 71382e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds 716262a0982SChuck Lever /** 717262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 718262a0982SChuck Lever * 719262a0982SChuck Lever * Input: 720262a0982SChuck Lever * buf: ignored 721262a0982SChuck Lever * size: zero 722262a0982SChuck Lever * 723262a0982SChuck Lever * OR 724262a0982SChuck Lever * 725262a0982SChuck Lever * Input: 726262a0982SChuck Lever * buf: C string containing whitespace- 727262a0982SChuck Lever * separated unsigned integer values 728262a0982SChuck Lever * representing the number of NFSD 729262a0982SChuck Lever * threads to start in each pool 730262a0982SChuck Lever * size: non-zero length of C string in @buf 731262a0982SChuck Lever * Output: 732262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 733262a0982SChuck Lever * string containing integer values representing the 734262a0982SChuck Lever * number of NFSD threads in each pool; 735262a0982SChuck Lever * return code is the size in bytes of the string 736262a0982SChuck Lever * On error: return code is zero or a negative errno value 737262a0982SChuck Lever */ 738eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 739eed2965aSGreg Banks { 740eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 741eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 742eed2965aSGreg Banks */ 743eed2965aSGreg Banks char *mesg = buf; 744eed2965aSGreg Banks int i; 745eed2965aSGreg Banks int rv; 746eed2965aSGreg Banks int len; 747bedbdd8bSNeil Brown int npools; 748eed2965aSGreg Banks int *nthreads; 749eed2965aSGreg Banks 750bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 751bedbdd8bSNeil Brown npools = nfsd_nrpools(); 752eed2965aSGreg Banks if (npools == 0) { 753eed2965aSGreg Banks /* 754eed2965aSGreg Banks * NFS is shut down. The admin can start it by 755eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 756eed2965aSGreg Banks * file, sorry. Report zero threads. 757eed2965aSGreg Banks */ 758bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 759eed2965aSGreg Banks strcpy(buf, "0\n"); 760eed2965aSGreg Banks return strlen(buf); 761eed2965aSGreg Banks } 762eed2965aSGreg Banks 763eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 764bedbdd8bSNeil Brown rv = -ENOMEM; 765eed2965aSGreg Banks if (nthreads == NULL) 766bedbdd8bSNeil Brown goto out_free; 767eed2965aSGreg Banks 768eed2965aSGreg Banks if (size > 0) { 769eed2965aSGreg Banks for (i = 0; i < npools; i++) { 770eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 771eed2965aSGreg Banks if (rv == -ENOENT) 772eed2965aSGreg Banks break; /* fewer numbers than pools */ 773eed2965aSGreg Banks if (rv) 774eed2965aSGreg Banks goto out_free; /* syntax error */ 775eed2965aSGreg Banks rv = -EINVAL; 776eed2965aSGreg Banks if (nthreads[i] < 0) 777eed2965aSGreg Banks goto out_free; 778eed2965aSGreg Banks } 779eed2965aSGreg Banks rv = nfsd_set_nrthreads(i, nthreads); 780eed2965aSGreg Banks if (rv) 781eed2965aSGreg Banks goto out_free; 782eed2965aSGreg Banks } 783eed2965aSGreg Banks 784eed2965aSGreg Banks rv = nfsd_get_nrthreads(npools, nthreads); 785eed2965aSGreg Banks if (rv) 786eed2965aSGreg Banks goto out_free; 787eed2965aSGreg Banks 788eed2965aSGreg Banks mesg = buf; 789eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 790eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 791eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 792eed2965aSGreg Banks len = strlen(mesg); 793eed2965aSGreg Banks size -= len; 794eed2965aSGreg Banks mesg += len; 795eed2965aSGreg Banks } 796413d63d7SJ. Bruce Fields rv = mesg - buf; 797eed2965aSGreg Banks out_free: 798eed2965aSGreg Banks kfree(nthreads); 799bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 800eed2965aSGreg Banks return rv; 801eed2965aSGreg Banks } 802eed2965aSGreg Banks 8033dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 80470c3b76cSNeilBrown { 80570c3b76cSNeilBrown char *mesg = buf; 8068daf220aSBenny Halevy char *vers, *minorp, sign; 807261758b5SChuck Lever int len, num, remaining; 8088daf220aSBenny Halevy unsigned minor; 80970c3b76cSNeilBrown ssize_t tlen = 0; 81070c3b76cSNeilBrown char *sep; 81170c3b76cSNeilBrown 81270c3b76cSNeilBrown if (size>0) { 81370c3b76cSNeilBrown if (nfsd_serv) 8146658d3a7SNeilBrown /* Cannot change versions without updating 8156658d3a7SNeilBrown * nfsd_serv->sv_xdrsize, and reallocing 8166658d3a7SNeilBrown * rq_argp and rq_resp 8176658d3a7SNeilBrown */ 81870c3b76cSNeilBrown return -EBUSY; 81970c3b76cSNeilBrown if (buf[size-1] != '\n') 82070c3b76cSNeilBrown return -EINVAL; 82170c3b76cSNeilBrown buf[size-1] = 0; 82270c3b76cSNeilBrown 82370c3b76cSNeilBrown vers = mesg; 82470c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 82570c3b76cSNeilBrown if (len <= 0) return -EINVAL; 82670c3b76cSNeilBrown do { 82770c3b76cSNeilBrown sign = *vers; 82870c3b76cSNeilBrown if (sign == '+' || sign == '-') 8298daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 83070c3b76cSNeilBrown else 8318daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 8328daf220aSBenny Halevy if (*minorp == '.') { 8338daf220aSBenny Halevy if (num < 4) 8348daf220aSBenny Halevy return -EINVAL; 8358daf220aSBenny Halevy minor = simple_strtoul(minorp+1, NULL, 0); 8368daf220aSBenny Halevy if (minor == 0) 8378daf220aSBenny Halevy return -EINVAL; 8388daf220aSBenny Halevy if (nfsd_minorversion(minor, sign == '-' ? 8398daf220aSBenny Halevy NFSD_CLEAR : NFSD_SET) < 0) 8408daf220aSBenny Halevy return -EINVAL; 8418daf220aSBenny Halevy goto next; 8428daf220aSBenny Halevy } 84370c3b76cSNeilBrown switch(num) { 84470c3b76cSNeilBrown case 2: 84570c3b76cSNeilBrown case 3: 84670c3b76cSNeilBrown case 4: 8476658d3a7SNeilBrown nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 84870c3b76cSNeilBrown break; 84970c3b76cSNeilBrown default: 85070c3b76cSNeilBrown return -EINVAL; 85170c3b76cSNeilBrown } 8528daf220aSBenny Halevy next: 85370c3b76cSNeilBrown vers += len + 1; 85470c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 85570c3b76cSNeilBrown /* If all get turned off, turn them back on, as 85670c3b76cSNeilBrown * having no versions is BAD 85770c3b76cSNeilBrown */ 8586658d3a7SNeilBrown nfsd_reset_versions(); 85970c3b76cSNeilBrown } 860261758b5SChuck Lever 86170c3b76cSNeilBrown /* Now write current state into reply buffer */ 86270c3b76cSNeilBrown len = 0; 86370c3b76cSNeilBrown sep = ""; 864261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 86570c3b76cSNeilBrown for (num=2 ; num <= 4 ; num++) 8666658d3a7SNeilBrown if (nfsd_vers(num, NFSD_AVAIL)) { 867261758b5SChuck Lever len = snprintf(buf, remaining, "%s%c%d", sep, 8686658d3a7SNeilBrown nfsd_vers(num, NFSD_TEST)?'+':'-', 86970c3b76cSNeilBrown num); 87070c3b76cSNeilBrown sep = " "; 871261758b5SChuck Lever 872261758b5SChuck Lever if (len > remaining) 873261758b5SChuck Lever break; 874261758b5SChuck Lever remaining -= len; 875261758b5SChuck Lever buf += len; 876261758b5SChuck Lever tlen += len; 87770c3b76cSNeilBrown } 8788daf220aSBenny Halevy if (nfsd_vers(4, NFSD_AVAIL)) 879261758b5SChuck Lever for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 880261758b5SChuck Lever minor++) { 881261758b5SChuck Lever len = snprintf(buf, remaining, " %c4.%u", 8828daf220aSBenny Halevy (nfsd_vers(4, NFSD_TEST) && 8838daf220aSBenny Halevy nfsd_minorversion(minor, NFSD_TEST)) ? 8848daf220aSBenny Halevy '+' : '-', 8858daf220aSBenny Halevy minor); 886261758b5SChuck Lever 887261758b5SChuck Lever if (len > remaining) 888261758b5SChuck Lever break; 889261758b5SChuck Lever remaining -= len; 890261758b5SChuck Lever buf += len; 891261758b5SChuck Lever tlen += len; 892261758b5SChuck Lever } 893261758b5SChuck Lever 894261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 895261758b5SChuck Lever if (len > remaining) 896261758b5SChuck Lever return -EINVAL; 897261758b5SChuck Lever return tlen + len; 89870c3b76cSNeilBrown } 89970c3b76cSNeilBrown 900262a0982SChuck Lever /** 901262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 902262a0982SChuck Lever * 903262a0982SChuck Lever * Input: 904262a0982SChuck Lever * buf: ignored 905262a0982SChuck Lever * size: zero 906262a0982SChuck Lever * Output: 907262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 908262a0982SChuck Lever * string containing positive or negative integer 909262a0982SChuck Lever * values representing the current status of each 910262a0982SChuck Lever * protocol version; 911262a0982SChuck Lever * return code is the size in bytes of the string 912262a0982SChuck Lever * On error: return code is zero or a negative errno value 913262a0982SChuck Lever * 914262a0982SChuck Lever * OR 915262a0982SChuck Lever * 916262a0982SChuck Lever * Input: 917262a0982SChuck Lever * buf: C string containing whitespace- 918262a0982SChuck Lever * separated positive or negative 919262a0982SChuck Lever * integer values representing NFS 920262a0982SChuck Lever * protocol versions to enable ("+n") 921262a0982SChuck Lever * or disable ("-n") 922262a0982SChuck Lever * size: non-zero length of C string in @buf 923262a0982SChuck Lever * Output: 924262a0982SChuck Lever * On success: status of zero or more protocol versions has 925262a0982SChuck Lever * been updated; passed-in buffer filled with 926262a0982SChuck Lever * '\n'-terminated C string containing positive 927262a0982SChuck Lever * or negative integer values representing the 928262a0982SChuck Lever * current status of each protocol version; 929262a0982SChuck Lever * return code is the size in bytes of the string 930262a0982SChuck Lever * On error: return code is zero or a negative errno value 931262a0982SChuck Lever */ 9323dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 9333dd98a3bSJeff Layton { 9343dd98a3bSJeff Layton ssize_t rv; 9353dd98a3bSJeff Layton 9363dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 9373dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 9383dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 9393dd98a3bSJeff Layton return rv; 9403dd98a3bSJeff Layton } 9413dd98a3bSJeff Layton 9424cd5dc75SChuck Lever /* 9430a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 9440a5372d8SChuck Lever * transports. 9450a5372d8SChuck Lever */ 9460a5372d8SChuck Lever static ssize_t __write_ports_names(char *buf) 9470a5372d8SChuck Lever { 9480a5372d8SChuck Lever if (nfsd_serv == NULL) 9490a5372d8SChuck Lever return 0; 950335c54bdSChuck Lever return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 9510a5372d8SChuck Lever } 9520a5372d8SChuck Lever 9530a5372d8SChuck Lever /* 9540b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 9550b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 9560b7c2f6fSChuck Lever * nfsd listener. 9570b7c2f6fSChuck Lever */ 9580b7c2f6fSChuck Lever static ssize_t __write_ports_addfd(char *buf) 9590b7c2f6fSChuck Lever { 9600b7c2f6fSChuck Lever char *mesg = buf; 9610b7c2f6fSChuck Lever int fd, err; 9620b7c2f6fSChuck Lever 9630b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 9640b7c2f6fSChuck Lever if (err != 0 || fd < 0) 9650b7c2f6fSChuck Lever return -EINVAL; 9660b7c2f6fSChuck Lever 9670b7c2f6fSChuck Lever err = nfsd_create_serv(); 9680b7c2f6fSChuck Lever if (err != 0) 9690b7c2f6fSChuck Lever return err; 9700b7c2f6fSChuck Lever 971bfba9ab4SChuck Lever err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 97278a8d7c8SJeff Layton if (err < 0) { 97378a8d7c8SJeff Layton svc_destroy(nfsd_serv); 97478a8d7c8SJeff Layton return err; 97578a8d7c8SJeff Layton } 976ea068badSChuck Lever 9770b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 9780b7c2f6fSChuck Lever nfsd_serv->sv_nrthreads--; 979ea068badSChuck Lever return err; 9800b7c2f6fSChuck Lever } 9810b7c2f6fSChuck Lever 9820b7c2f6fSChuck Lever /* 98382d56591SChuck Lever * A '-' followed by the 'name' of a socket means we close the socket. 98482d56591SChuck Lever */ 98582d56591SChuck Lever static ssize_t __write_ports_delfd(char *buf) 98682d56591SChuck Lever { 98782d56591SChuck Lever char *toclose; 98882d56591SChuck Lever int len = 0; 98982d56591SChuck Lever 99082d56591SChuck Lever toclose = kstrdup(buf + 1, GFP_KERNEL); 99182d56591SChuck Lever if (toclose == NULL) 99282d56591SChuck Lever return -ENOMEM; 99382d56591SChuck Lever 99482d56591SChuck Lever if (nfsd_serv != NULL) 9958435d34dSChuck Lever len = svc_sock_names(nfsd_serv, buf, 9968435d34dSChuck Lever SIMPLE_TRANSACTION_LIMIT, toclose); 99782d56591SChuck Lever kfree(toclose); 99882d56591SChuck Lever return len; 99982d56591SChuck Lever } 100082d56591SChuck Lever 100182d56591SChuck Lever /* 10024eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 10034eb68c26SChuck Lever * a port number. 10044eb68c26SChuck Lever */ 10054eb68c26SChuck Lever static ssize_t __write_ports_addxprt(char *buf) 10064eb68c26SChuck Lever { 10074eb68c26SChuck Lever char transport[16]; 100837498292SChuck Lever struct svc_xprt *xprt; 10094eb68c26SChuck Lever int port, err; 10104eb68c26SChuck Lever 10114eb68c26SChuck Lever if (sscanf(buf, "%15s %4u", transport, &port) != 2) 10124eb68c26SChuck Lever return -EINVAL; 10134eb68c26SChuck Lever 10144be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 10154eb68c26SChuck Lever return -EINVAL; 10164eb68c26SChuck Lever 10174eb68c26SChuck Lever err = nfsd_create_serv(); 10184eb68c26SChuck Lever if (err != 0) 10194eb68c26SChuck Lever return err; 10204eb68c26SChuck Lever 1021fc5d00b0SPavel Emelyanov err = svc_create_xprt(nfsd_serv, transport, &init_net, 10224eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 102368717908SChuck Lever if (err < 0) 102437498292SChuck Lever goto out_err; 102537498292SChuck Lever 1026fc5d00b0SPavel Emelyanov err = svc_create_xprt(nfsd_serv, transport, &init_net, 102737498292SChuck Lever PF_INET6, port, SVC_SOCK_ANONYMOUS); 102837498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 102937498292SChuck Lever goto out_close; 10300cd14a06SJeff Layton 10310cd14a06SJeff Layton /* Decrease the count, but don't shut down the service */ 10320cd14a06SJeff Layton nfsd_serv->sv_nrthreads--; 10334eb68c26SChuck Lever return 0; 103437498292SChuck Lever out_close: 103537498292SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); 103637498292SChuck Lever if (xprt != NULL) { 103737498292SChuck Lever svc_close_xprt(xprt); 103837498292SChuck Lever svc_xprt_put(xprt); 103937498292SChuck Lever } 104037498292SChuck Lever out_err: 10410cd14a06SJeff Layton svc_destroy(nfsd_serv); 104237498292SChuck Lever return err; 10434eb68c26SChuck Lever } 10444eb68c26SChuck Lever 10454eb68c26SChuck Lever /* 10464cd5dc75SChuck Lever * A transport listener is removed by writing a "-", it's transport 10474cd5dc75SChuck Lever * name, and it's port number. 10484cd5dc75SChuck Lever */ 10494cd5dc75SChuck Lever static ssize_t __write_ports_delxprt(char *buf) 10504cd5dc75SChuck Lever { 10514cd5dc75SChuck Lever struct svc_xprt *xprt; 10524cd5dc75SChuck Lever char transport[16]; 10534cd5dc75SChuck Lever int port; 10544cd5dc75SChuck Lever 10554cd5dc75SChuck Lever if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) 10564cd5dc75SChuck Lever return -EINVAL; 10574cd5dc75SChuck Lever 10584be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) 10594cd5dc75SChuck Lever return -EINVAL; 10604cd5dc75SChuck Lever 10614cd5dc75SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); 10624cd5dc75SChuck Lever if (xprt == NULL) 10634cd5dc75SChuck Lever return -ENOTCONN; 10644cd5dc75SChuck Lever 10654cd5dc75SChuck Lever svc_close_xprt(xprt); 10664cd5dc75SChuck Lever svc_xprt_put(xprt); 10674cd5dc75SChuck Lever return 0; 10684cd5dc75SChuck Lever } 10694cd5dc75SChuck Lever 1070bedbdd8bSNeil Brown static ssize_t __write_ports(struct file *file, char *buf, size_t size) 107180212d59SNeilBrown { 10720a5372d8SChuck Lever if (size == 0) 10730a5372d8SChuck Lever return __write_ports_names(buf); 10740b7c2f6fSChuck Lever 10750b7c2f6fSChuck Lever if (isdigit(buf[0])) 10760b7c2f6fSChuck Lever return __write_ports_addfd(buf); 107782d56591SChuck Lever 107882d56591SChuck Lever if (buf[0] == '-' && isdigit(buf[1])) 107982d56591SChuck Lever return __write_ports_delfd(buf); 10804eb68c26SChuck Lever 10814eb68c26SChuck Lever if (isalpha(buf[0])) 10824eb68c26SChuck Lever return __write_ports_addxprt(buf); 10834cd5dc75SChuck Lever 10844cd5dc75SChuck Lever if (buf[0] == '-' && isalpha(buf[1])) 10854cd5dc75SChuck Lever return __write_ports_delxprt(buf); 10864cd5dc75SChuck Lever 1087b41b66d6SNeilBrown return -EINVAL; 1088b41b66d6SNeilBrown } 108980212d59SNeilBrown 1090262a0982SChuck Lever /** 1091262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 1092262a0982SChuck Lever * 1093262a0982SChuck Lever * Input: 1094262a0982SChuck Lever * buf: ignored 1095262a0982SChuck Lever * size: zero 1096262a0982SChuck Lever * Output: 1097262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 1098262a0982SChuck Lever * string containing a whitespace-separated list of 1099262a0982SChuck Lever * named NFSD listeners; 1100262a0982SChuck Lever * return code is the size in bytes of the string 1101262a0982SChuck Lever * On error: return code is zero or a negative errno value 1102262a0982SChuck Lever * 1103262a0982SChuck Lever * OR 1104262a0982SChuck Lever * 1105262a0982SChuck Lever * Input: 1106262a0982SChuck Lever * buf: C string containing an unsigned 1107262a0982SChuck Lever * integer value representing a bound 1108262a0982SChuck Lever * but unconnected socket that is to be 1109c71206a7SChuck Lever * used as an NFSD listener; listen(3) 1110c71206a7SChuck Lever * must be called for a SOCK_STREAM 1111c71206a7SChuck Lever * socket, otherwise it is ignored 1112262a0982SChuck Lever * size: non-zero length of C string in @buf 1113262a0982SChuck Lever * Output: 1114262a0982SChuck Lever * On success: NFS service is started; 1115262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1116262a0982SChuck Lever * string containing a unique alphanumeric name of 1117262a0982SChuck Lever * the listener; 1118262a0982SChuck Lever * return code is the size in bytes of the string 1119262a0982SChuck Lever * On error: return code is a negative errno value 1120262a0982SChuck Lever * 1121262a0982SChuck Lever * OR 1122262a0982SChuck Lever * 1123262a0982SChuck Lever * Input: 1124262a0982SChuck Lever * buf: C string containing a "-" followed 1125262a0982SChuck Lever * by an integer value representing a 1126262a0982SChuck Lever * previously passed in socket file 1127262a0982SChuck Lever * descriptor 1128262a0982SChuck Lever * size: non-zero length of C string in @buf 1129262a0982SChuck Lever * Output: 1130262a0982SChuck Lever * On success: NFS service no longer listens on that socket; 1131262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 1132262a0982SChuck Lever * string containing a unique name of the listener; 1133262a0982SChuck Lever * return code is the size in bytes of the string 1134262a0982SChuck Lever * On error: return code is a negative errno value 1135262a0982SChuck Lever * 1136262a0982SChuck Lever * OR 1137262a0982SChuck Lever * 1138262a0982SChuck Lever * Input: 1139262a0982SChuck Lever * buf: C string containing a transport 1140262a0982SChuck Lever * name and an unsigned integer value 1141262a0982SChuck Lever * representing the port to listen on, 1142262a0982SChuck Lever * separated by whitespace 1143262a0982SChuck Lever * size: non-zero length of C string in @buf 1144262a0982SChuck Lever * Output: 1145262a0982SChuck Lever * On success: returns zero; NFS service is started 1146262a0982SChuck Lever * On error: return code is a negative errno value 1147262a0982SChuck Lever * 1148262a0982SChuck Lever * OR 1149262a0982SChuck Lever * 1150262a0982SChuck Lever * Input: 1151262a0982SChuck Lever * buf: C string containing a "-" followed 1152262a0982SChuck Lever * by a transport name and an unsigned 1153262a0982SChuck Lever * integer value representing the port 1154262a0982SChuck Lever * to listen on, separated by whitespace 1155262a0982SChuck Lever * size: non-zero length of C string in @buf 1156262a0982SChuck Lever * Output: 1157262a0982SChuck Lever * On success: returns zero; NFS service no longer listens 1158262a0982SChuck Lever * on that transport 1159262a0982SChuck Lever * On error: return code is a negative errno value 1160262a0982SChuck Lever */ 1161bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 1162bedbdd8bSNeil Brown { 1163bedbdd8bSNeil Brown ssize_t rv; 11643dd98a3bSJeff Layton 1165bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 1166bedbdd8bSNeil Brown rv = __write_ports(file, buf, size); 1167bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1168bedbdd8bSNeil Brown return rv; 1169bedbdd8bSNeil Brown } 1170bedbdd8bSNeil Brown 1171bedbdd8bSNeil Brown 1172596bbe53SNeilBrown int nfsd_max_blksize; 1173596bbe53SNeilBrown 1174262a0982SChuck Lever /** 1175262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 1176262a0982SChuck Lever * 1177262a0982SChuck Lever * Input: 1178262a0982SChuck Lever * buf: ignored 1179262a0982SChuck Lever * size: zero 1180262a0982SChuck Lever * 1181262a0982SChuck Lever * OR 1182262a0982SChuck Lever * 1183262a0982SChuck Lever * Input: 1184262a0982SChuck Lever * buf: C string containing an unsigned 1185262a0982SChuck Lever * integer value representing the new 1186262a0982SChuck Lever * NFS blksize 1187262a0982SChuck Lever * size: non-zero length of C string in @buf 1188262a0982SChuck Lever * Output: 1189262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1190262a0982SChuck Lever * containing numeric value of the current NFS blksize 1191262a0982SChuck Lever * setting; 1192262a0982SChuck Lever * return code is the size in bytes of the string 1193262a0982SChuck Lever * On error: return code is zero or a negative errno value 1194262a0982SChuck Lever */ 1195596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 1196596bbe53SNeilBrown { 1197596bbe53SNeilBrown char *mesg = buf; 1198596bbe53SNeilBrown if (size > 0) { 1199596bbe53SNeilBrown int bsize; 1200596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 1201596bbe53SNeilBrown if (rv) 1202596bbe53SNeilBrown return rv; 1203596bbe53SNeilBrown /* force bsize into allowed range and 1204596bbe53SNeilBrown * required alignment. 1205596bbe53SNeilBrown */ 1206596bbe53SNeilBrown if (bsize < 1024) 1207596bbe53SNeilBrown bsize = 1024; 1208596bbe53SNeilBrown if (bsize > NFSSVC_MAXBLKSIZE) 1209596bbe53SNeilBrown bsize = NFSSVC_MAXBLKSIZE; 1210596bbe53SNeilBrown bsize &= ~(1024-1); 1211bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 12127fa53cc8SJ. Bruce Fields if (nfsd_serv) { 1213bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1214596bbe53SNeilBrown return -EBUSY; 1215596bbe53SNeilBrown } 1216596bbe53SNeilBrown nfsd_max_blksize = bsize; 1217bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 1218596bbe53SNeilBrown } 1219e06b6405SChuck Lever 1220e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 1221e06b6405SChuck Lever nfsd_max_blksize); 1222596bbe53SNeilBrown } 1223596bbe53SNeilBrown 122470c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 1225f0135740SJ. Bruce Fields static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 12261da177e4SLinus Torvalds { 12271da177e4SLinus Torvalds char *mesg = buf; 1228f0135740SJ. Bruce Fields int rv, i; 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds if (size > 0) { 12313dd98a3bSJeff Layton if (nfsd_serv) 12323dd98a3bSJeff Layton return -EBUSY; 1233f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 12341da177e4SLinus Torvalds if (rv) 12351da177e4SLinus Torvalds return rv; 1236e7b184f1SJ. Bruce Fields /* 1237e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 1238e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 1239e7b184f1SJ. Bruce Fields * extremes are: 1240e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 1241e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 1242e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 1243e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 1244e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 1245e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 1246e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 1247e7b184f1SJ. Bruce Fields */ 1248f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 12491da177e4SLinus Torvalds return -EINVAL; 1250f0135740SJ. Bruce Fields *time = i; 12511da177e4SLinus Torvalds } 1252e06b6405SChuck Lever 1253f0135740SJ. Bruce Fields return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 1254f0135740SJ. Bruce Fields } 1255f0135740SJ. Bruce Fields 1256f0135740SJ. Bruce Fields static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 1257f0135740SJ. Bruce Fields { 1258f0135740SJ. Bruce Fields ssize_t rv; 1259f0135740SJ. Bruce Fields 1260f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 1261f0135740SJ. Bruce Fields rv = __nfsd4_write_time(file, buf, size, time); 1262f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 1263f0135740SJ. Bruce Fields return rv; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds 1266262a0982SChuck Lever /** 1267262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 1268262a0982SChuck Lever * 1269262a0982SChuck Lever * Input: 1270262a0982SChuck Lever * buf: ignored 1271262a0982SChuck Lever * size: zero 1272262a0982SChuck Lever * 1273262a0982SChuck Lever * OR 1274262a0982SChuck Lever * 1275262a0982SChuck Lever * Input: 1276262a0982SChuck Lever * buf: C string containing an unsigned 1277262a0982SChuck Lever * integer value representing the new 1278262a0982SChuck Lever * NFSv4 lease expiry time 1279262a0982SChuck Lever * size: non-zero length of C string in @buf 1280262a0982SChuck Lever * Output: 1281262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1282262a0982SChuck Lever * string containing unsigned integer value of the 1283262a0982SChuck Lever * current lease expiry time; 1284262a0982SChuck Lever * return code is the size in bytes of the string 1285262a0982SChuck Lever * On error: return code is zero or a negative errno value 1286262a0982SChuck Lever */ 12873dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 12883dd98a3bSJeff Layton { 1289f0135740SJ. Bruce Fields return nfsd4_write_time(file, buf, size, &nfsd4_lease); 12903dd98a3bSJeff Layton } 12913dd98a3bSJeff Layton 1292efc4bb4fSJ. Bruce Fields /** 1293efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1294efc4bb4fSJ. Bruce Fields * 1295efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1296efc4bb4fSJ. Bruce Fields * 1297efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1298efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1299efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1300efc4bb4fSJ. Bruce Fields * anyway.) 1301efc4bb4fSJ. Bruce Fields */ 1302efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1303efc4bb4fSJ. Bruce Fields { 1304efc4bb4fSJ. Bruce Fields return nfsd4_write_time(file, buf, size, &nfsd4_grace); 1305efc4bb4fSJ. Bruce Fields } 1306efc4bb4fSJ. Bruce Fields 13073dd98a3bSJeff Layton extern char *nfs4_recoverydir(void); 13083dd98a3bSJeff Layton 13093dd98a3bSJeff Layton static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) 13100964a3d3SNeilBrown { 13110964a3d3SNeilBrown char *mesg = buf; 13120964a3d3SNeilBrown char *recdir; 13130964a3d3SNeilBrown int len, status; 13140964a3d3SNeilBrown 13153dd98a3bSJeff Layton if (size > 0) { 13163dd98a3bSJeff Layton if (nfsd_serv) 13173dd98a3bSJeff Layton return -EBUSY; 13183dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 13190964a3d3SNeilBrown return -EINVAL; 13200964a3d3SNeilBrown buf[size-1] = 0; 13210964a3d3SNeilBrown 13220964a3d3SNeilBrown recdir = mesg; 13230964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 13240964a3d3SNeilBrown if (len <= 0) 13250964a3d3SNeilBrown return -EINVAL; 13260964a3d3SNeilBrown 13270964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 132869049961SAndi Kleen if (status) 132969049961SAndi Kleen return status; 13303dd98a3bSJeff Layton } 13313d72ab8fSChuck Lever 13323d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 13333d72ab8fSChuck Lever nfs4_recoverydir()); 13340964a3d3SNeilBrown } 13353dd98a3bSJeff Layton 1336262a0982SChuck Lever /** 1337262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1338262a0982SChuck Lever * 1339262a0982SChuck Lever * Input: 1340262a0982SChuck Lever * buf: ignored 1341262a0982SChuck Lever * size: zero 1342262a0982SChuck Lever * 1343262a0982SChuck Lever * OR 1344262a0982SChuck Lever * 1345262a0982SChuck Lever * Input: 1346262a0982SChuck Lever * buf: C string containing the pathname 1347262a0982SChuck Lever * of the directory on a local file 1348262a0982SChuck Lever * system containing permanent NFSv4 1349262a0982SChuck Lever * recovery data 1350262a0982SChuck Lever * size: non-zero length of C string in @buf 1351262a0982SChuck Lever * Output: 1352262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1353262a0982SChuck Lever * containing the current recovery pathname setting; 1354262a0982SChuck Lever * return code is the size in bytes of the string 1355262a0982SChuck Lever * On error: return code is zero or a negative errno value 1356262a0982SChuck Lever */ 13573dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 13583dd98a3bSJeff Layton { 13593dd98a3bSJeff Layton ssize_t rv; 13603dd98a3bSJeff Layton 13613dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 13623dd98a3bSJeff Layton rv = __write_recoverydir(file, buf, size); 13633dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 13643dd98a3bSJeff Layton return rv; 13653dd98a3bSJeff Layton } 13663dd98a3bSJeff Layton 136770c3b76cSNeilBrown #endif 13680964a3d3SNeilBrown 13691da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 13701da177e4SLinus Torvalds /* 13711da177e4SLinus Torvalds * populating the filesystem. 13721da177e4SLinus Torvalds */ 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 13751da177e4SLinus Torvalds { 13761da177e4SLinus Torvalds static struct tree_descr nfsd_files[] = { 13771e140567SNeilBrown #ifdef CONFIG_NFSD_DEPRECATED 13781da177e4SLinus Torvalds [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 13791da177e4SLinus Torvalds [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 13801da177e4SLinus Torvalds [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 13811da177e4SLinus Torvalds [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 13821da177e4SLinus Torvalds [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 13831da177e4SLinus Torvalds [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 13841da177e4SLinus Torvalds [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 13851e140567SNeilBrown #endif 13861da177e4SLinus Torvalds [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 1387e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1388e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 13894373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13904373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 139117efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 139217efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13931da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13941da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1395eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 139603cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 139770c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 139880212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1399596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 14001da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 14011da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1402efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 14030964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 14041da177e4SLinus Torvalds #endif 14051da177e4SLinus Torvalds /* last one */ {""} 14061da177e4SLinus Torvalds }; 14071da177e4SLinus Torvalds return simple_fill_super(sb, 0x6e667364, nfsd_files); 14081da177e4SLinus Torvalds } 14091da177e4SLinus Torvalds 1410fc14f2feSAl Viro static struct dentry *nfsd_mount(struct file_system_type *fs_type, 1411fc14f2feSAl Viro int flags, const char *dev_name, void *data) 14121da177e4SLinus Torvalds { 1413fc14f2feSAl Viro return mount_single(fs_type, flags, data, nfsd_fill_super); 14141da177e4SLinus Torvalds } 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 14171da177e4SLinus Torvalds .owner = THIS_MODULE, 14181da177e4SLinus Torvalds .name = "nfsd", 1419fc14f2feSAl Viro .mount = nfsd_mount, 14201da177e4SLinus Torvalds .kill_sb = kill_litter_super, 14211da177e4SLinus Torvalds }; 14221da177e4SLinus Torvalds 1423e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1424e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1425e331f606SJ. Bruce Fields { 1426e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1427e331f606SJ. Bruce Fields 1428e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1429e331f606SJ. Bruce Fields if (!entry) 1430e331f606SJ. Bruce Fields return -ENOMEM; 14319ef2db26SDenis V. Lunev entry = proc_create("exports", 0, entry, &exports_operations); 1432e331f606SJ. Bruce Fields if (!entry) 1433e331f606SJ. Bruce Fields return -ENOMEM; 1434e331f606SJ. Bruce Fields return 0; 1435e331f606SJ. Bruce Fields } 1436e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1437e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1438e331f606SJ. Bruce Fields { 1439e331f606SJ. Bruce Fields return 0; 1440e331f606SJ. Bruce Fields } 1441e331f606SJ. Bruce Fields #endif 1442e331f606SJ. Bruce Fields 14431da177e4SLinus Torvalds static int __init init_nfsd(void) 14441da177e4SLinus Torvalds { 14451da177e4SLinus Torvalds int retval; 14461da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 14471da177e4SLinus Torvalds 1448e8ff2a84SJ. Bruce Fields retval = nfs4_state_init(); /* nfs4 locking state */ 1449e8ff2a84SJ. Bruce Fields if (retval) 1450e8ff2a84SJ. Bruce Fields return retval; 14511da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1452d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1453d5c3428bSJ. Bruce Fields if (retval) 1454d5c3428bSJ. Bruce Fields goto out_free_stat; 1455dbf847ecSJ. Bruce Fields retval = nfsd_export_init(); 1456dbf847ecSJ. Bruce Fields if (retval) 1457dbf847ecSJ. Bruce Fields goto out_free_cache; 14581da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1459dbf847ecSJ. Bruce Fields retval = nfsd_idmap_init(); 1460dbf847ecSJ. Bruce Fields if (retval) 1461dbf847ecSJ. Bruce Fields goto out_free_lockd; 1462e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1463e331f606SJ. Bruce Fields if (retval) 1464e331f606SJ. Bruce Fields goto out_free_idmap; 14651da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 146626808d3fSJ. Bruce Fields if (retval) 146726808d3fSJ. Bruce Fields goto out_free_all; 146826808d3fSJ. Bruce Fields return 0; 146926808d3fSJ. Bruce Fields out_free_all: 14701da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14711da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1472e331f606SJ. Bruce Fields out_free_idmap: 1473dbf847ecSJ. Bruce Fields nfsd_idmap_shutdown(); 1474dbf847ecSJ. Bruce Fields out_free_lockd: 14751da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1476e331f606SJ. Bruce Fields nfsd_export_shutdown(); 1477dbf847ecSJ. Bruce Fields out_free_cache: 1478e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1479d5c3428bSJ. Bruce Fields out_free_stat: 1480d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 148146b25895SJ. Bruce Fields nfsd4_free_slabs(); 14821da177e4SLinus Torvalds return retval; 14831da177e4SLinus Torvalds } 14841da177e4SLinus Torvalds 14851da177e4SLinus Torvalds static void __exit exit_nfsd(void) 14861da177e4SLinus Torvalds { 14871da177e4SLinus Torvalds nfsd_export_shutdown(); 1488d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 14891da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 14901da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 14911da177e4SLinus Torvalds nfsd_stat_shutdown(); 14921da177e4SLinus Torvalds nfsd_lockd_shutdown(); 14931da177e4SLinus Torvalds nfsd_idmap_shutdown(); 1494e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 14951da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 14961da177e4SLinus Torvalds } 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 14991da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 15001da177e4SLinus Torvalds module_init(init_nfsd) 15011da177e4SLinus Torvalds module_exit(exit_nfsd) 1502