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> 124373ea84SWendy Cheng #include <linux/lockd/lockd.h> 134116092bSChuck Lever #include <linux/sunrpc/clnt.h> 14b0b0c0a2SKevin Coffman #include <linux/sunrpc/gss_api.h> 15b084f598SJ. Bruce Fields #include <linux/sunrpc/gss_krb5_enctypes.h> 16143cb494SPaul Gortmaker #include <linux/module.h> 171da177e4SLinus Torvalds 182ca72e17SJ. Bruce Fields #include "idmap.h" 199a74af21SBoaz Harrosh #include "nfsd.h" 209a74af21SBoaz Harrosh #include "cache.h" 219a74af21SBoaz Harrosh 221da177e4SLinus Torvalds /* 23b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 241da177e4SLinus Torvalds */ 251da177e4SLinus Torvalds enum { 261da177e4SLinus Torvalds NFSD_Root = 1, 271da177e4SLinus Torvalds NFSD_List, 28e8e8753fSJ. Bruce Fields NFSD_Export_features, 291da177e4SLinus Torvalds NFSD_Fh, 304373ea84SWendy Cheng NFSD_FO_UnlockIP, 3117efa372SWendy Cheng NFSD_FO_UnlockFS, 321da177e4SLinus Torvalds NFSD_Threads, 33eed2965aSGreg Banks NFSD_Pool_Threads, 3403cf6c9fSGreg Banks NFSD_Pool_Stats, 3570c3b76cSNeilBrown NFSD_Versions, 3680212d59SNeilBrown NFSD_Ports, 37596bbe53SNeilBrown NFSD_MaxBlkSize, 38b0b0c0a2SKevin Coffman NFSD_SupportedEnctypes, 3970c3b76cSNeilBrown /* 4070c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4170c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 4270c3b76cSNeilBrown */ 4370c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 441da177e4SLinus Torvalds NFSD_Leasetime, 45efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 460964a3d3SNeilBrown NFSD_RecoveryDir, 4770c3b76cSNeilBrown #endif 481da177e4SLinus Torvalds }; 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* 511da177e4SLinus Torvalds * write() for these nodes. 521da177e4SLinus Torvalds */ 531da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 54b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 55b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 561da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 57eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 5870c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 5980212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 60596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 6170c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 621da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 63efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 640964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 6570c3b76cSNeilBrown #endif 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 681da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 69b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 70b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 711da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 72eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 7370c3b76cSNeilBrown [NFSD_Versions] = write_versions, 7480212d59SNeilBrown [NFSD_Ports] = write_ports, 75596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 7670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 771da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 78efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 790964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 8070c3b76cSNeilBrown #endif 811da177e4SLinus Torvalds }; 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 841da177e4SLinus Torvalds { 857eaa36e2SJosef "Jeff" Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 861da177e4SLinus Torvalds char *data; 871da177e4SLinus Torvalds ssize_t rv; 881da177e4SLinus Torvalds 89e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 901da177e4SLinus Torvalds return -EINVAL; 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 931da177e4SLinus Torvalds if (IS_ERR(data)) 941da177e4SLinus Torvalds return PTR_ERR(data); 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 978971a101SNeilBrown if (rv >= 0) { 981da177e4SLinus Torvalds simple_transaction_set(file, rv); 991da177e4SLinus Torvalds rv = size; 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds return rv; 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1047390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1057390022dSNeilBrown { 1067390022dSNeilBrown if (! file->private_data) { 1077390022dSNeilBrown /* An attempt to read a transaction file without writing 1087390022dSNeilBrown * causes a 0-byte write so that the file can return 1097390022dSNeilBrown * state information 1107390022dSNeilBrown */ 1117390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1127390022dSNeilBrown if (rv < 0) 1137390022dSNeilBrown return rv; 1147390022dSNeilBrown } 1157390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1167390022dSNeilBrown } 1177390022dSNeilBrown 1184b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1191da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1207390022dSNeilBrown .read = nfsctl_transaction_read, 1211da177e4SLinus Torvalds .release = simple_transaction_release, 1226038f373SArnd Bergmann .llseek = default_llseek, 1231da177e4SLinus Torvalds }; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds static int exports_open(struct inode *inode, struct file *file) 1261da177e4SLinus Torvalds { 1271da177e4SLinus Torvalds return seq_open(file, &nfs_exports_op); 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 1304b6f5d20SArjan van de Ven static const struct file_operations exports_operations = { 1311da177e4SLinus Torvalds .open = exports_open, 1321da177e4SLinus Torvalds .read = seq_read, 1331da177e4SLinus Torvalds .llseek = seq_lseek, 1341da177e4SLinus Torvalds .release = seq_release, 1359ef2db26SDenis V. Lunev .owner = THIS_MODULE, 1361da177e4SLinus Torvalds }; 1371da177e4SLinus Torvalds 138e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 139e8e8753fSJ. Bruce Fields { 140e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 141e8e8753fSJ. Bruce Fields return 0; 142e8e8753fSJ. Bruce Fields } 143e8e8753fSJ. Bruce Fields 144e8e8753fSJ. Bruce Fields static int export_features_open(struct inode *inode, struct file *file) 145e8e8753fSJ. Bruce Fields { 146e8e8753fSJ. Bruce Fields return single_open(file, export_features_show, NULL); 147e8e8753fSJ. Bruce Fields } 148e8e8753fSJ. Bruce Fields 149e8e8753fSJ. Bruce Fields static struct file_operations export_features_operations = { 150e8e8753fSJ. Bruce Fields .open = export_features_open, 151e8e8753fSJ. Bruce Fields .read = seq_read, 152e8e8753fSJ. Bruce Fields .llseek = seq_lseek, 153e8e8753fSJ. Bruce Fields .release = single_release, 154e8e8753fSJ. Bruce Fields }; 155e8e8753fSJ. Bruce Fields 156b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 157b0b0c0a2SKevin Coffman static int supported_enctypes_show(struct seq_file *m, void *v) 158b0b0c0a2SKevin Coffman { 159b084f598SJ. Bruce Fields seq_printf(m, KRB5_SUPPORTED_ENCTYPES); 160b0b0c0a2SKevin Coffman return 0; 161b0b0c0a2SKevin Coffman } 162b0b0c0a2SKevin Coffman 163b0b0c0a2SKevin Coffman static int supported_enctypes_open(struct inode *inode, struct file *file) 164b0b0c0a2SKevin Coffman { 165b0b0c0a2SKevin Coffman return single_open(file, supported_enctypes_show, NULL); 166b0b0c0a2SKevin Coffman } 167b0b0c0a2SKevin Coffman 168b0b0c0a2SKevin Coffman static struct file_operations supported_enctypes_ops = { 169b0b0c0a2SKevin Coffman .open = supported_enctypes_open, 170b0b0c0a2SKevin Coffman .read = seq_read, 171b0b0c0a2SKevin Coffman .llseek = seq_lseek, 172b0b0c0a2SKevin Coffman .release = single_release, 173b0b0c0a2SKevin Coffman }; 174b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 175b0b0c0a2SKevin Coffman 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 1921da177e4SLinus Torvalds 193262a0982SChuck Lever /** 194262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 195262a0982SChuck Lever * 196262a0982SChuck Lever * Experimental. 197262a0982SChuck Lever * 198262a0982SChuck Lever * Input: 199262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2004116092bSChuck Lever * presentation format IP address 201262a0982SChuck Lever * size: length of C string in @buf 202262a0982SChuck Lever * Output: 203262a0982SChuck Lever * On success: returns zero if all specified locks were released; 204262a0982SChuck Lever * returns one if one or more locks were not released 205262a0982SChuck Lever * On error: return code is negative errno value 206262a0982SChuck Lever */ 207b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2084373ea84SWendy Cheng { 2094116092bSChuck Lever struct sockaddr_storage address; 2104116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2114116092bSChuck Lever size_t salen = sizeof(address); 212367c8c7bSChuck Lever char *fo_path; 2134373ea84SWendy Cheng 2144373ea84SWendy Cheng /* sanity check */ 2154373ea84SWendy Cheng if (size == 0) 2164373ea84SWendy Cheng return -EINVAL; 2174373ea84SWendy Cheng 2184373ea84SWendy Cheng if (buf[size-1] != '\n') 2194373ea84SWendy Cheng return -EINVAL; 2204373ea84SWendy Cheng 2214373ea84SWendy Cheng fo_path = buf; 2224373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2234373ea84SWendy Cheng return -EINVAL; 2244373ea84SWendy Cheng 2254116092bSChuck Lever if (rpc_pton(fo_path, size, sap, salen) == 0) 2264373ea84SWendy Cheng return -EINVAL; 2274373ea84SWendy Cheng 2284116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2294373ea84SWendy Cheng } 2304373ea84SWendy Cheng 231262a0982SChuck Lever /** 232262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 233262a0982SChuck Lever * 234262a0982SChuck Lever * Experimental. 235262a0982SChuck Lever * 236262a0982SChuck Lever * Input: 237262a0982SChuck Lever * buf: '\n'-terminated C string containing the 238262a0982SChuck Lever * absolute pathname of a local file system 239262a0982SChuck Lever * size: length of C string in @buf 240262a0982SChuck Lever * Output: 241262a0982SChuck Lever * On success: returns zero if all specified locks were released; 242262a0982SChuck Lever * returns one if one or more locks were not released 243262a0982SChuck Lever * On error: return code is negative errno value 244262a0982SChuck Lever */ 245b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 24617efa372SWendy Cheng { 247a63bb996SAl Viro struct path path; 24817efa372SWendy Cheng char *fo_path; 24917efa372SWendy Cheng int error; 25017efa372SWendy Cheng 25117efa372SWendy Cheng /* sanity check */ 25217efa372SWendy Cheng if (size == 0) 25317efa372SWendy Cheng return -EINVAL; 25417efa372SWendy Cheng 25517efa372SWendy Cheng if (buf[size-1] != '\n') 25617efa372SWendy Cheng return -EINVAL; 25717efa372SWendy Cheng 25817efa372SWendy Cheng fo_path = buf; 25917efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 26017efa372SWendy Cheng return -EINVAL; 26117efa372SWendy Cheng 262a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 26317efa372SWendy Cheng if (error) 26417efa372SWendy Cheng return error; 26517efa372SWendy Cheng 266262a0982SChuck Lever /* 267262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 268262a0982SChuck Lever * releasing locks on the wrong file system. 269262a0982SChuck Lever * 270262a0982SChuck Lever * For example: 271262a0982SChuck Lever * 1. Does the path refer to a directory? 272262a0982SChuck Lever * 2. Is that directory a mount point, or 273262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 274262a0982SChuck Lever */ 275*d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 27617efa372SWendy Cheng 277a63bb996SAl Viro path_put(&path); 27817efa372SWendy Cheng return error; 27917efa372SWendy Cheng } 28017efa372SWendy Cheng 281262a0982SChuck Lever /** 282262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 283262a0982SChuck Lever * 284262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 285262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 286262a0982SChuck Lever * contain escape sequences. 287262a0982SChuck Lever * 288262a0982SChuck Lever * Input: 289262a0982SChuck Lever * buf: 290262a0982SChuck Lever * domain: client domain name 291262a0982SChuck Lever * path: export pathname 292262a0982SChuck Lever * maxsize: numeric maximum size of 293262a0982SChuck Lever * @buf 294262a0982SChuck Lever * size: length of C string in @buf 295262a0982SChuck Lever * Output: 296262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 297262a0982SChuck Lever * string containing a ASCII hex text version 298262a0982SChuck Lever * of the NFS file handle; 299262a0982SChuck Lever * return code is the size in bytes of the string 300262a0982SChuck Lever * On error: return code is negative errno value 301262a0982SChuck Lever */ 3021da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3031da177e4SLinus Torvalds { 3041da177e4SLinus Torvalds char *dname, *path; 305246d95baSAndrew Morton int uninitialized_var(maxsize); 3061da177e4SLinus Torvalds char *mesg = buf; 3071da177e4SLinus Torvalds int len; 3081da177e4SLinus Torvalds struct auth_domain *dom; 3091da177e4SLinus Torvalds struct knfsd_fh fh; 3101da177e4SLinus Torvalds 31187d26ea7SJ. Bruce Fields if (size == 0) 31287d26ea7SJ. Bruce Fields return -EINVAL; 31387d26ea7SJ. Bruce Fields 3141da177e4SLinus Torvalds if (buf[size-1] != '\n') 3151da177e4SLinus Torvalds return -EINVAL; 3161da177e4SLinus Torvalds buf[size-1] = 0; 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds dname = mesg; 3191da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 32054224f04SChuck Lever if (len <= 0) 32154224f04SChuck Lever return -EINVAL; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds path = dname+len+1; 3241da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 32554224f04SChuck Lever if (len <= 0) 32654224f04SChuck Lever return -EINVAL; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3291da177e4SLinus Torvalds if (len) 3301da177e4SLinus Torvalds return len; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3331da177e4SLinus Torvalds return -EINVAL; 3341da177e4SLinus Torvalds if (maxsize > NFS3_FHSIZE) 3351da177e4SLinus Torvalds maxsize = NFS3_FHSIZE; 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3381da177e4SLinus Torvalds return -EINVAL; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3411da177e4SLinus Torvalds dom = unix_domain_find(dname); 3421da177e4SLinus Torvalds if (!dom) 3431da177e4SLinus Torvalds return -ENOMEM; 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds len = exp_rootfh(dom, path, &fh, maxsize); 3461da177e4SLinus Torvalds auth_domain_put(dom); 3471da177e4SLinus Torvalds if (len) 3481da177e4SLinus Torvalds return len; 3491da177e4SLinus Torvalds 35054224f04SChuck Lever mesg = buf; 35154224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 3521da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 3531da177e4SLinus Torvalds mesg[-1] = '\n'; 3541da177e4SLinus Torvalds return mesg - buf; 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds 357262a0982SChuck Lever /** 358262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 359262a0982SChuck Lever * 360262a0982SChuck Lever * Input: 361262a0982SChuck Lever * buf: ignored 362262a0982SChuck Lever * size: zero 363262a0982SChuck Lever * Output: 364262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 365262a0982SChuck Lever * string numeric value representing the number of 366262a0982SChuck Lever * running NFSD threads; 367262a0982SChuck Lever * return code is the size in bytes of the string 368262a0982SChuck Lever * On error: return code is zero 369262a0982SChuck Lever * 370262a0982SChuck Lever * OR 371262a0982SChuck Lever * 372262a0982SChuck Lever * Input: 373262a0982SChuck Lever * buf: C string containing an unsigned 374262a0982SChuck Lever * integer value representing the 375262a0982SChuck Lever * number of NFSD threads to start 376262a0982SChuck Lever * size: non-zero length of C string in @buf 377262a0982SChuck Lever * Output: 378262a0982SChuck Lever * On success: NFS service is started; 379262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 380262a0982SChuck Lever * string numeric value representing the number of 381262a0982SChuck Lever * running NFSD threads; 382262a0982SChuck Lever * return code is the size in bytes of the string 383262a0982SChuck Lever * On error: return code is zero or a negative errno value 384262a0982SChuck Lever */ 3851da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 3861da177e4SLinus Torvalds { 3871da177e4SLinus Torvalds char *mesg = buf; 3881da177e4SLinus Torvalds int rv; 3891da177e4SLinus Torvalds if (size > 0) { 3901da177e4SLinus Torvalds int newthreads; 3911da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 3921da177e4SLinus Torvalds if (rv) 3931da177e4SLinus Torvalds return rv; 3941da177e4SLinus Torvalds if (newthreads < 0) 3951da177e4SLinus Torvalds return -EINVAL; 3969e074856SChuck Lever rv = nfsd_svc(NFS_PORT, newthreads); 39782e12fe9SNeilBrown if (rv < 0) 3981da177e4SLinus Torvalds return rv; 39982e12fe9SNeilBrown } else 40082e12fe9SNeilBrown rv = nfsd_nrthreads(); 401e06b6405SChuck Lever 40282e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds 405262a0982SChuck Lever /** 406262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 407262a0982SChuck Lever * 408262a0982SChuck Lever * Input: 409262a0982SChuck Lever * buf: ignored 410262a0982SChuck Lever * size: zero 411262a0982SChuck Lever * 412262a0982SChuck Lever * OR 413262a0982SChuck Lever * 414262a0982SChuck Lever * Input: 415262a0982SChuck Lever * buf: C string containing whitespace- 416262a0982SChuck Lever * separated unsigned integer values 417262a0982SChuck Lever * representing the number of NFSD 418262a0982SChuck Lever * threads to start in each pool 419262a0982SChuck Lever * size: non-zero length of C string in @buf 420262a0982SChuck Lever * Output: 421262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 422262a0982SChuck Lever * string containing integer values representing the 423262a0982SChuck Lever * number of NFSD threads in each pool; 424262a0982SChuck Lever * return code is the size in bytes of the string 425262a0982SChuck Lever * On error: return code is zero or a negative errno value 426262a0982SChuck Lever */ 427eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 428eed2965aSGreg Banks { 429eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 430eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 431eed2965aSGreg Banks */ 432eed2965aSGreg Banks char *mesg = buf; 433eed2965aSGreg Banks int i; 434eed2965aSGreg Banks int rv; 435eed2965aSGreg Banks int len; 436bedbdd8bSNeil Brown int npools; 437eed2965aSGreg Banks int *nthreads; 438eed2965aSGreg Banks 439bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 440bedbdd8bSNeil Brown npools = nfsd_nrpools(); 441eed2965aSGreg Banks if (npools == 0) { 442eed2965aSGreg Banks /* 443eed2965aSGreg Banks * NFS is shut down. The admin can start it by 444eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 445eed2965aSGreg Banks * file, sorry. Report zero threads. 446eed2965aSGreg Banks */ 447bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 448eed2965aSGreg Banks strcpy(buf, "0\n"); 449eed2965aSGreg Banks return strlen(buf); 450eed2965aSGreg Banks } 451eed2965aSGreg Banks 452eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 453bedbdd8bSNeil Brown rv = -ENOMEM; 454eed2965aSGreg Banks if (nthreads == NULL) 455bedbdd8bSNeil Brown goto out_free; 456eed2965aSGreg Banks 457eed2965aSGreg Banks if (size > 0) { 458eed2965aSGreg Banks for (i = 0; i < npools; i++) { 459eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 460eed2965aSGreg Banks if (rv == -ENOENT) 461eed2965aSGreg Banks break; /* fewer numbers than pools */ 462eed2965aSGreg Banks if (rv) 463eed2965aSGreg Banks goto out_free; /* syntax error */ 464eed2965aSGreg Banks rv = -EINVAL; 465eed2965aSGreg Banks if (nthreads[i] < 0) 466eed2965aSGreg Banks goto out_free; 467eed2965aSGreg Banks } 468eed2965aSGreg Banks rv = nfsd_set_nrthreads(i, nthreads); 469eed2965aSGreg Banks if (rv) 470eed2965aSGreg Banks goto out_free; 471eed2965aSGreg Banks } 472eed2965aSGreg Banks 473eed2965aSGreg Banks rv = nfsd_get_nrthreads(npools, nthreads); 474eed2965aSGreg Banks if (rv) 475eed2965aSGreg Banks goto out_free; 476eed2965aSGreg Banks 477eed2965aSGreg Banks mesg = buf; 478eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 479eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 480eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 481eed2965aSGreg Banks len = strlen(mesg); 482eed2965aSGreg Banks size -= len; 483eed2965aSGreg Banks mesg += len; 484eed2965aSGreg Banks } 485413d63d7SJ. Bruce Fields rv = mesg - buf; 486eed2965aSGreg Banks out_free: 487eed2965aSGreg Banks kfree(nthreads); 488bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 489eed2965aSGreg Banks return rv; 490eed2965aSGreg Banks } 491eed2965aSGreg Banks 4923dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 49370c3b76cSNeilBrown { 49470c3b76cSNeilBrown char *mesg = buf; 4958daf220aSBenny Halevy char *vers, *minorp, sign; 496261758b5SChuck Lever int len, num, remaining; 4978daf220aSBenny Halevy unsigned minor; 49870c3b76cSNeilBrown ssize_t tlen = 0; 49970c3b76cSNeilBrown char *sep; 50070c3b76cSNeilBrown 50170c3b76cSNeilBrown if (size>0) { 50270c3b76cSNeilBrown if (nfsd_serv) 5036658d3a7SNeilBrown /* Cannot change versions without updating 5046658d3a7SNeilBrown * nfsd_serv->sv_xdrsize, and reallocing 5056658d3a7SNeilBrown * rq_argp and rq_resp 5066658d3a7SNeilBrown */ 50770c3b76cSNeilBrown return -EBUSY; 50870c3b76cSNeilBrown if (buf[size-1] != '\n') 50970c3b76cSNeilBrown return -EINVAL; 51070c3b76cSNeilBrown buf[size-1] = 0; 51170c3b76cSNeilBrown 51270c3b76cSNeilBrown vers = mesg; 51370c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 51470c3b76cSNeilBrown if (len <= 0) return -EINVAL; 51570c3b76cSNeilBrown do { 51670c3b76cSNeilBrown sign = *vers; 51770c3b76cSNeilBrown if (sign == '+' || sign == '-') 5188daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 51970c3b76cSNeilBrown else 5208daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5218daf220aSBenny Halevy if (*minorp == '.') { 5228daf220aSBenny Halevy if (num < 4) 5238daf220aSBenny Halevy return -EINVAL; 5248daf220aSBenny Halevy minor = simple_strtoul(minorp+1, NULL, 0); 5258daf220aSBenny Halevy if (minor == 0) 5268daf220aSBenny Halevy return -EINVAL; 5278daf220aSBenny Halevy if (nfsd_minorversion(minor, sign == '-' ? 5288daf220aSBenny Halevy NFSD_CLEAR : NFSD_SET) < 0) 5298daf220aSBenny Halevy return -EINVAL; 5308daf220aSBenny Halevy goto next; 5318daf220aSBenny Halevy } 53270c3b76cSNeilBrown switch(num) { 53370c3b76cSNeilBrown case 2: 53470c3b76cSNeilBrown case 3: 53570c3b76cSNeilBrown case 4: 5366658d3a7SNeilBrown nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 53770c3b76cSNeilBrown break; 53870c3b76cSNeilBrown default: 53970c3b76cSNeilBrown return -EINVAL; 54070c3b76cSNeilBrown } 5418daf220aSBenny Halevy next: 54270c3b76cSNeilBrown vers += len + 1; 54370c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 54470c3b76cSNeilBrown /* If all get turned off, turn them back on, as 54570c3b76cSNeilBrown * having no versions is BAD 54670c3b76cSNeilBrown */ 5476658d3a7SNeilBrown nfsd_reset_versions(); 54870c3b76cSNeilBrown } 549261758b5SChuck Lever 55070c3b76cSNeilBrown /* Now write current state into reply buffer */ 55170c3b76cSNeilBrown len = 0; 55270c3b76cSNeilBrown sep = ""; 553261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 55470c3b76cSNeilBrown for (num=2 ; num <= 4 ; num++) 5556658d3a7SNeilBrown if (nfsd_vers(num, NFSD_AVAIL)) { 556261758b5SChuck Lever len = snprintf(buf, remaining, "%s%c%d", sep, 5576658d3a7SNeilBrown nfsd_vers(num, NFSD_TEST)?'+':'-', 55870c3b76cSNeilBrown num); 55970c3b76cSNeilBrown sep = " "; 560261758b5SChuck Lever 561261758b5SChuck Lever if (len > remaining) 562261758b5SChuck Lever break; 563261758b5SChuck Lever remaining -= len; 564261758b5SChuck Lever buf += len; 565261758b5SChuck Lever tlen += len; 56670c3b76cSNeilBrown } 5678daf220aSBenny Halevy if (nfsd_vers(4, NFSD_AVAIL)) 568261758b5SChuck Lever for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 569261758b5SChuck Lever minor++) { 570261758b5SChuck Lever len = snprintf(buf, remaining, " %c4.%u", 5718daf220aSBenny Halevy (nfsd_vers(4, NFSD_TEST) && 5728daf220aSBenny Halevy nfsd_minorversion(minor, NFSD_TEST)) ? 5738daf220aSBenny Halevy '+' : '-', 5748daf220aSBenny Halevy minor); 575261758b5SChuck Lever 576261758b5SChuck Lever if (len > remaining) 577261758b5SChuck Lever break; 578261758b5SChuck Lever remaining -= len; 579261758b5SChuck Lever buf += len; 580261758b5SChuck Lever tlen += len; 581261758b5SChuck Lever } 582261758b5SChuck Lever 583261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 584261758b5SChuck Lever if (len > remaining) 585261758b5SChuck Lever return -EINVAL; 586261758b5SChuck Lever return tlen + len; 58770c3b76cSNeilBrown } 58870c3b76cSNeilBrown 589262a0982SChuck Lever /** 590262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 591262a0982SChuck Lever * 592262a0982SChuck Lever * Input: 593262a0982SChuck Lever * buf: ignored 594262a0982SChuck Lever * size: zero 595262a0982SChuck Lever * Output: 596262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 597262a0982SChuck Lever * string containing positive or negative integer 598262a0982SChuck Lever * values representing the current status of each 599262a0982SChuck Lever * protocol version; 600262a0982SChuck Lever * return code is the size in bytes of the string 601262a0982SChuck Lever * On error: return code is zero or a negative errno value 602262a0982SChuck Lever * 603262a0982SChuck Lever * OR 604262a0982SChuck Lever * 605262a0982SChuck Lever * Input: 606262a0982SChuck Lever * buf: C string containing whitespace- 607262a0982SChuck Lever * separated positive or negative 608262a0982SChuck Lever * integer values representing NFS 609262a0982SChuck Lever * protocol versions to enable ("+n") 610262a0982SChuck Lever * or disable ("-n") 611262a0982SChuck Lever * size: non-zero length of C string in @buf 612262a0982SChuck Lever * Output: 613262a0982SChuck Lever * On success: status of zero or more protocol versions has 614262a0982SChuck Lever * been updated; passed-in buffer filled with 615262a0982SChuck Lever * '\n'-terminated C string containing positive 616262a0982SChuck Lever * or negative integer values representing the 617262a0982SChuck Lever * current status of each protocol version; 618262a0982SChuck Lever * return code is the size in bytes of the string 619262a0982SChuck Lever * On error: return code is zero or a negative errno value 620262a0982SChuck Lever */ 6213dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6223dd98a3bSJeff Layton { 6233dd98a3bSJeff Layton ssize_t rv; 6243dd98a3bSJeff Layton 6253dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6263dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6273dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6283dd98a3bSJeff Layton return rv; 6293dd98a3bSJeff Layton } 6303dd98a3bSJeff Layton 6314cd5dc75SChuck Lever /* 6320a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 6330a5372d8SChuck Lever * transports. 6340a5372d8SChuck Lever */ 6350a5372d8SChuck Lever static ssize_t __write_ports_names(char *buf) 6360a5372d8SChuck Lever { 6370a5372d8SChuck Lever if (nfsd_serv == NULL) 6380a5372d8SChuck Lever return 0; 639335c54bdSChuck Lever return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 6400a5372d8SChuck Lever } 6410a5372d8SChuck Lever 6420a5372d8SChuck Lever /* 6430b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 6440b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 6450b7c2f6fSChuck Lever * nfsd listener. 6460b7c2f6fSChuck Lever */ 6470b7c2f6fSChuck Lever static ssize_t __write_ports_addfd(char *buf) 6480b7c2f6fSChuck Lever { 6490b7c2f6fSChuck Lever char *mesg = buf; 6500b7c2f6fSChuck Lever int fd, err; 6510b7c2f6fSChuck Lever 6520b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 6530b7c2f6fSChuck Lever if (err != 0 || fd < 0) 6540b7c2f6fSChuck Lever return -EINVAL; 6550b7c2f6fSChuck Lever 6560b7c2f6fSChuck Lever err = nfsd_create_serv(); 6570b7c2f6fSChuck Lever if (err != 0) 6580b7c2f6fSChuck Lever return err; 6590b7c2f6fSChuck Lever 660bfba9ab4SChuck Lever err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 66178a8d7c8SJeff Layton if (err < 0) { 66278a8d7c8SJeff Layton svc_destroy(nfsd_serv); 66378a8d7c8SJeff Layton return err; 66478a8d7c8SJeff Layton } 665ea068badSChuck Lever 6660b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 6670b7c2f6fSChuck Lever nfsd_serv->sv_nrthreads--; 668ea068badSChuck Lever return err; 6690b7c2f6fSChuck Lever } 6700b7c2f6fSChuck Lever 6710b7c2f6fSChuck Lever /* 67282d56591SChuck Lever * A '-' followed by the 'name' of a socket means we close the socket. 67382d56591SChuck Lever */ 67482d56591SChuck Lever static ssize_t __write_ports_delfd(char *buf) 67582d56591SChuck Lever { 67682d56591SChuck Lever char *toclose; 67782d56591SChuck Lever int len = 0; 67882d56591SChuck Lever 67982d56591SChuck Lever toclose = kstrdup(buf + 1, GFP_KERNEL); 68082d56591SChuck Lever if (toclose == NULL) 68182d56591SChuck Lever return -ENOMEM; 68282d56591SChuck Lever 68382d56591SChuck Lever if (nfsd_serv != NULL) 6848435d34dSChuck Lever len = svc_sock_names(nfsd_serv, buf, 6858435d34dSChuck Lever SIMPLE_TRANSACTION_LIMIT, toclose); 68682d56591SChuck Lever kfree(toclose); 68782d56591SChuck Lever return len; 68882d56591SChuck Lever } 68982d56591SChuck Lever 69082d56591SChuck Lever /* 6914eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 6924eb68c26SChuck Lever * a port number. 6934eb68c26SChuck Lever */ 6944eb68c26SChuck Lever static ssize_t __write_ports_addxprt(char *buf) 6954eb68c26SChuck Lever { 6964eb68c26SChuck Lever char transport[16]; 69737498292SChuck Lever struct svc_xprt *xprt; 6984eb68c26SChuck Lever int port, err; 6994eb68c26SChuck Lever 7004eb68c26SChuck Lever if (sscanf(buf, "%15s %4u", transport, &port) != 2) 7014eb68c26SChuck Lever return -EINVAL; 7024eb68c26SChuck Lever 7034be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7044eb68c26SChuck Lever return -EINVAL; 7054eb68c26SChuck Lever 7064eb68c26SChuck Lever err = nfsd_create_serv(); 7074eb68c26SChuck Lever if (err != 0) 7084eb68c26SChuck Lever return err; 7094eb68c26SChuck Lever 710fc5d00b0SPavel Emelyanov err = svc_create_xprt(nfsd_serv, transport, &init_net, 7114eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 71268717908SChuck Lever if (err < 0) 71337498292SChuck Lever goto out_err; 71437498292SChuck Lever 715fc5d00b0SPavel Emelyanov err = svc_create_xprt(nfsd_serv, transport, &init_net, 71637498292SChuck Lever PF_INET6, port, SVC_SOCK_ANONYMOUS); 71737498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 71837498292SChuck Lever goto out_close; 7190cd14a06SJeff Layton 7200cd14a06SJeff Layton /* Decrease the count, but don't shut down the service */ 7210cd14a06SJeff Layton nfsd_serv->sv_nrthreads--; 7224eb68c26SChuck Lever return 0; 72337498292SChuck Lever out_close: 72437498292SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); 72537498292SChuck Lever if (xprt != NULL) { 72637498292SChuck Lever svc_close_xprt(xprt); 72737498292SChuck Lever svc_xprt_put(xprt); 72837498292SChuck Lever } 72937498292SChuck Lever out_err: 7300cd14a06SJeff Layton svc_destroy(nfsd_serv); 73137498292SChuck Lever return err; 7324eb68c26SChuck Lever } 7334eb68c26SChuck Lever 7344eb68c26SChuck Lever /* 7354cd5dc75SChuck Lever * A transport listener is removed by writing a "-", it's transport 7364cd5dc75SChuck Lever * name, and it's port number. 7374cd5dc75SChuck Lever */ 7384cd5dc75SChuck Lever static ssize_t __write_ports_delxprt(char *buf) 7394cd5dc75SChuck Lever { 7404cd5dc75SChuck Lever struct svc_xprt *xprt; 7414cd5dc75SChuck Lever char transport[16]; 7424cd5dc75SChuck Lever int port; 7434cd5dc75SChuck Lever 7444cd5dc75SChuck Lever if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) 7454cd5dc75SChuck Lever return -EINVAL; 7464cd5dc75SChuck Lever 7474be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) 7484cd5dc75SChuck Lever return -EINVAL; 7494cd5dc75SChuck Lever 7504cd5dc75SChuck Lever xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); 7514cd5dc75SChuck Lever if (xprt == NULL) 7524cd5dc75SChuck Lever return -ENOTCONN; 7534cd5dc75SChuck Lever 7544cd5dc75SChuck Lever svc_close_xprt(xprt); 7554cd5dc75SChuck Lever svc_xprt_put(xprt); 7564cd5dc75SChuck Lever return 0; 7574cd5dc75SChuck Lever } 7584cd5dc75SChuck Lever 759bedbdd8bSNeil Brown static ssize_t __write_ports(struct file *file, char *buf, size_t size) 76080212d59SNeilBrown { 7610a5372d8SChuck Lever if (size == 0) 7620a5372d8SChuck Lever return __write_ports_names(buf); 7630b7c2f6fSChuck Lever 7640b7c2f6fSChuck Lever if (isdigit(buf[0])) 7650b7c2f6fSChuck Lever return __write_ports_addfd(buf); 76682d56591SChuck Lever 76782d56591SChuck Lever if (buf[0] == '-' && isdigit(buf[1])) 76882d56591SChuck Lever return __write_ports_delfd(buf); 7694eb68c26SChuck Lever 7704eb68c26SChuck Lever if (isalpha(buf[0])) 7714eb68c26SChuck Lever return __write_ports_addxprt(buf); 7724cd5dc75SChuck Lever 7734cd5dc75SChuck Lever if (buf[0] == '-' && isalpha(buf[1])) 7744cd5dc75SChuck Lever return __write_ports_delxprt(buf); 7754cd5dc75SChuck Lever 776b41b66d6SNeilBrown return -EINVAL; 777b41b66d6SNeilBrown } 77880212d59SNeilBrown 779262a0982SChuck Lever /** 780262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 781262a0982SChuck Lever * 782262a0982SChuck Lever * Input: 783262a0982SChuck Lever * buf: ignored 784262a0982SChuck Lever * size: zero 785262a0982SChuck Lever * Output: 786262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 787262a0982SChuck Lever * string containing a whitespace-separated list of 788262a0982SChuck Lever * named NFSD listeners; 789262a0982SChuck Lever * return code is the size in bytes of the string 790262a0982SChuck Lever * On error: return code is zero or a negative errno value 791262a0982SChuck Lever * 792262a0982SChuck Lever * OR 793262a0982SChuck Lever * 794262a0982SChuck Lever * Input: 795262a0982SChuck Lever * buf: C string containing an unsigned 796262a0982SChuck Lever * integer value representing a bound 797262a0982SChuck Lever * but unconnected socket that is to be 798c71206a7SChuck Lever * used as an NFSD listener; listen(3) 799c71206a7SChuck Lever * must be called for a SOCK_STREAM 800c71206a7SChuck Lever * socket, otherwise it is ignored 801262a0982SChuck Lever * size: non-zero length of C string in @buf 802262a0982SChuck Lever * Output: 803262a0982SChuck Lever * On success: NFS service is started; 804262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 805262a0982SChuck Lever * string containing a unique alphanumeric name of 806262a0982SChuck Lever * the listener; 807262a0982SChuck Lever * return code is the size in bytes of the string 808262a0982SChuck Lever * On error: return code is a negative errno value 809262a0982SChuck Lever * 810262a0982SChuck Lever * OR 811262a0982SChuck Lever * 812262a0982SChuck Lever * Input: 813262a0982SChuck Lever * buf: C string containing a "-" followed 814262a0982SChuck Lever * by an integer value representing a 815262a0982SChuck Lever * previously passed in socket file 816262a0982SChuck Lever * descriptor 817262a0982SChuck Lever * size: non-zero length of C string in @buf 818262a0982SChuck Lever * Output: 819262a0982SChuck Lever * On success: NFS service no longer listens on that socket; 820262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 821262a0982SChuck Lever * string containing a unique name of the listener; 822262a0982SChuck Lever * return code is the size in bytes of the string 823262a0982SChuck Lever * On error: return code is a negative errno value 824262a0982SChuck Lever * 825262a0982SChuck Lever * OR 826262a0982SChuck Lever * 827262a0982SChuck Lever * Input: 828262a0982SChuck Lever * buf: C string containing a transport 829262a0982SChuck Lever * name and an unsigned integer value 830262a0982SChuck Lever * representing the port to listen on, 831262a0982SChuck Lever * separated by whitespace 832262a0982SChuck Lever * size: non-zero length of C string in @buf 833262a0982SChuck Lever * Output: 834262a0982SChuck Lever * On success: returns zero; NFS service is started 835262a0982SChuck Lever * On error: return code is a negative errno value 836262a0982SChuck Lever * 837262a0982SChuck Lever * OR 838262a0982SChuck Lever * 839262a0982SChuck Lever * Input: 840262a0982SChuck Lever * buf: C string containing a "-" followed 841262a0982SChuck Lever * by a transport name and an unsigned 842262a0982SChuck Lever * integer value representing the port 843262a0982SChuck Lever * to listen on, separated by whitespace 844262a0982SChuck Lever * size: non-zero length of C string in @buf 845262a0982SChuck Lever * Output: 846262a0982SChuck Lever * On success: returns zero; NFS service no longer listens 847262a0982SChuck Lever * on that transport 848262a0982SChuck Lever * On error: return code is a negative errno value 849262a0982SChuck Lever */ 850bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 851bedbdd8bSNeil Brown { 852bedbdd8bSNeil Brown ssize_t rv; 8533dd98a3bSJeff Layton 854bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 855bedbdd8bSNeil Brown rv = __write_ports(file, buf, size); 856bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 857bedbdd8bSNeil Brown return rv; 858bedbdd8bSNeil Brown } 859bedbdd8bSNeil Brown 860bedbdd8bSNeil Brown 861596bbe53SNeilBrown int nfsd_max_blksize; 862596bbe53SNeilBrown 863262a0982SChuck Lever /** 864262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 865262a0982SChuck Lever * 866262a0982SChuck Lever * Input: 867262a0982SChuck Lever * buf: ignored 868262a0982SChuck Lever * size: zero 869262a0982SChuck Lever * 870262a0982SChuck Lever * OR 871262a0982SChuck Lever * 872262a0982SChuck Lever * Input: 873262a0982SChuck Lever * buf: C string containing an unsigned 874262a0982SChuck Lever * integer value representing the new 875262a0982SChuck Lever * NFS blksize 876262a0982SChuck Lever * size: non-zero length of C string in @buf 877262a0982SChuck Lever * Output: 878262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 879262a0982SChuck Lever * containing numeric value of the current NFS blksize 880262a0982SChuck Lever * setting; 881262a0982SChuck Lever * return code is the size in bytes of the string 882262a0982SChuck Lever * On error: return code is zero or a negative errno value 883262a0982SChuck Lever */ 884596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 885596bbe53SNeilBrown { 886596bbe53SNeilBrown char *mesg = buf; 887596bbe53SNeilBrown if (size > 0) { 888596bbe53SNeilBrown int bsize; 889596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 890596bbe53SNeilBrown if (rv) 891596bbe53SNeilBrown return rv; 892596bbe53SNeilBrown /* force bsize into allowed range and 893596bbe53SNeilBrown * required alignment. 894596bbe53SNeilBrown */ 895596bbe53SNeilBrown if (bsize < 1024) 896596bbe53SNeilBrown bsize = 1024; 897596bbe53SNeilBrown if (bsize > NFSSVC_MAXBLKSIZE) 898596bbe53SNeilBrown bsize = NFSSVC_MAXBLKSIZE; 899596bbe53SNeilBrown bsize &= ~(1024-1); 900bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 9017fa53cc8SJ. Bruce Fields if (nfsd_serv) { 902bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 903596bbe53SNeilBrown return -EBUSY; 904596bbe53SNeilBrown } 905596bbe53SNeilBrown nfsd_max_blksize = bsize; 906bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 907596bbe53SNeilBrown } 908e06b6405SChuck Lever 909e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 910e06b6405SChuck Lever nfsd_max_blksize); 911596bbe53SNeilBrown } 912596bbe53SNeilBrown 91370c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 914f0135740SJ. Bruce Fields static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 9151da177e4SLinus Torvalds { 9161da177e4SLinus Torvalds char *mesg = buf; 917f0135740SJ. Bruce Fields int rv, i; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds if (size > 0) { 9203dd98a3bSJeff Layton if (nfsd_serv) 9213dd98a3bSJeff Layton return -EBUSY; 922f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9231da177e4SLinus Torvalds if (rv) 9241da177e4SLinus Torvalds return rv; 925e7b184f1SJ. Bruce Fields /* 926e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 927e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 928e7b184f1SJ. Bruce Fields * extremes are: 929e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 930e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 931e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 932e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 933e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 934e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 935e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 936e7b184f1SJ. Bruce Fields */ 937f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9381da177e4SLinus Torvalds return -EINVAL; 939f0135740SJ. Bruce Fields *time = i; 9401da177e4SLinus Torvalds } 941e06b6405SChuck Lever 942f0135740SJ. Bruce Fields return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 943f0135740SJ. Bruce Fields } 944f0135740SJ. Bruce Fields 945f0135740SJ. Bruce Fields static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 946f0135740SJ. Bruce Fields { 947f0135740SJ. Bruce Fields ssize_t rv; 948f0135740SJ. Bruce Fields 949f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 950f0135740SJ. Bruce Fields rv = __nfsd4_write_time(file, buf, size, time); 951f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 952f0135740SJ. Bruce Fields return rv; 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 955262a0982SChuck Lever /** 956262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 957262a0982SChuck Lever * 958262a0982SChuck Lever * Input: 959262a0982SChuck Lever * buf: ignored 960262a0982SChuck Lever * size: zero 961262a0982SChuck Lever * 962262a0982SChuck Lever * OR 963262a0982SChuck Lever * 964262a0982SChuck Lever * Input: 965262a0982SChuck Lever * buf: C string containing an unsigned 966262a0982SChuck Lever * integer value representing the new 967262a0982SChuck Lever * NFSv4 lease expiry time 968262a0982SChuck Lever * size: non-zero length of C string in @buf 969262a0982SChuck Lever * Output: 970262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 971262a0982SChuck Lever * string containing unsigned integer value of the 972262a0982SChuck Lever * current lease expiry time; 973262a0982SChuck Lever * return code is the size in bytes of the string 974262a0982SChuck Lever * On error: return code is zero or a negative errno value 975262a0982SChuck Lever */ 9763dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 9773dd98a3bSJeff Layton { 978f0135740SJ. Bruce Fields return nfsd4_write_time(file, buf, size, &nfsd4_lease); 9793dd98a3bSJeff Layton } 9803dd98a3bSJeff Layton 981efc4bb4fSJ. Bruce Fields /** 982efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 983efc4bb4fSJ. Bruce Fields * 984efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 985efc4bb4fSJ. Bruce Fields * 986efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 987efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 988efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 989efc4bb4fSJ. Bruce Fields * anyway.) 990efc4bb4fSJ. Bruce Fields */ 991efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 992efc4bb4fSJ. Bruce Fields { 993efc4bb4fSJ. Bruce Fields return nfsd4_write_time(file, buf, size, &nfsd4_grace); 994efc4bb4fSJ. Bruce Fields } 995efc4bb4fSJ. Bruce Fields 9963dd98a3bSJeff Layton extern char *nfs4_recoverydir(void); 9973dd98a3bSJeff Layton 9983dd98a3bSJeff Layton static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) 9990964a3d3SNeilBrown { 10000964a3d3SNeilBrown char *mesg = buf; 10010964a3d3SNeilBrown char *recdir; 10020964a3d3SNeilBrown int len, status; 10030964a3d3SNeilBrown 10043dd98a3bSJeff Layton if (size > 0) { 10053dd98a3bSJeff Layton if (nfsd_serv) 10063dd98a3bSJeff Layton return -EBUSY; 10073dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10080964a3d3SNeilBrown return -EINVAL; 10090964a3d3SNeilBrown buf[size-1] = 0; 10100964a3d3SNeilBrown 10110964a3d3SNeilBrown recdir = mesg; 10120964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10130964a3d3SNeilBrown if (len <= 0) 10140964a3d3SNeilBrown return -EINVAL; 10150964a3d3SNeilBrown 10160964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 101769049961SAndi Kleen if (status) 101869049961SAndi Kleen return status; 10193dd98a3bSJeff Layton } 10203d72ab8fSChuck Lever 10213d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10223d72ab8fSChuck Lever nfs4_recoverydir()); 10230964a3d3SNeilBrown } 10243dd98a3bSJeff Layton 1025262a0982SChuck Lever /** 1026262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1027262a0982SChuck Lever * 1028262a0982SChuck Lever * Input: 1029262a0982SChuck Lever * buf: ignored 1030262a0982SChuck Lever * size: zero 1031262a0982SChuck Lever * 1032262a0982SChuck Lever * OR 1033262a0982SChuck Lever * 1034262a0982SChuck Lever * Input: 1035262a0982SChuck Lever * buf: C string containing the pathname 1036262a0982SChuck Lever * of the directory on a local file 1037262a0982SChuck Lever * system containing permanent NFSv4 1038262a0982SChuck Lever * recovery data 1039262a0982SChuck Lever * size: non-zero length of C string in @buf 1040262a0982SChuck Lever * Output: 1041262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1042262a0982SChuck Lever * containing the current recovery pathname setting; 1043262a0982SChuck Lever * return code is the size in bytes of the string 1044262a0982SChuck Lever * On error: return code is zero or a negative errno value 1045262a0982SChuck Lever */ 10463dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10473dd98a3bSJeff Layton { 10483dd98a3bSJeff Layton ssize_t rv; 10493dd98a3bSJeff Layton 10503dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10513dd98a3bSJeff Layton rv = __write_recoverydir(file, buf, size); 10523dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10533dd98a3bSJeff Layton return rv; 10543dd98a3bSJeff Layton } 10553dd98a3bSJeff Layton 105670c3b76cSNeilBrown #endif 10570964a3d3SNeilBrown 10581da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 10591da177e4SLinus Torvalds /* 10601da177e4SLinus Torvalds * populating the filesystem. 10611da177e4SLinus Torvalds */ 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds static struct tree_descr nfsd_files[] = { 10661da177e4SLinus Torvalds [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 1067e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1068e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 10694373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 10704373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 107117efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 107217efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 10731da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 10741da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1075eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 107603cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 107770c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 107880212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1079596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 1080b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 1081b0b0c0a2SKevin Coffman [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, 1082b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 10831da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 10841da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1085efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 10860964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 10871da177e4SLinus Torvalds #endif 10881da177e4SLinus Torvalds /* last one */ {""} 10891da177e4SLinus Torvalds }; 10901da177e4SLinus Torvalds return simple_fill_super(sb, 0x6e667364, nfsd_files); 10911da177e4SLinus Torvalds } 10921da177e4SLinus Torvalds 1093fc14f2feSAl Viro static struct dentry *nfsd_mount(struct file_system_type *fs_type, 1094fc14f2feSAl Viro int flags, const char *dev_name, void *data) 10951da177e4SLinus Torvalds { 1096fc14f2feSAl Viro return mount_single(fs_type, flags, data, nfsd_fill_super); 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 11001da177e4SLinus Torvalds .owner = THIS_MODULE, 11011da177e4SLinus Torvalds .name = "nfsd", 1102fc14f2feSAl Viro .mount = nfsd_mount, 11031da177e4SLinus Torvalds .kill_sb = kill_litter_super, 11041da177e4SLinus Torvalds }; 11051da177e4SLinus Torvalds 1106e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1107e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1108e331f606SJ. Bruce Fields { 1109e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1110e331f606SJ. Bruce Fields 1111e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1112e331f606SJ. Bruce Fields if (!entry) 1113e331f606SJ. Bruce Fields return -ENOMEM; 11149ef2db26SDenis V. Lunev entry = proc_create("exports", 0, entry, &exports_operations); 1115e331f606SJ. Bruce Fields if (!entry) 1116e331f606SJ. Bruce Fields return -ENOMEM; 1117e331f606SJ. Bruce Fields return 0; 1118e331f606SJ. Bruce Fields } 1119e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1120e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1121e331f606SJ. Bruce Fields { 1122e331f606SJ. Bruce Fields return 0; 1123e331f606SJ. Bruce Fields } 1124e331f606SJ. Bruce Fields #endif 1125e331f606SJ. Bruce Fields 11261da177e4SLinus Torvalds static int __init init_nfsd(void) 11271da177e4SLinus Torvalds { 11281da177e4SLinus Torvalds int retval; 11291da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 11301da177e4SLinus Torvalds 1131e8ff2a84SJ. Bruce Fields retval = nfs4_state_init(); /* nfs4 locking state */ 1132e8ff2a84SJ. Bruce Fields if (retval) 1133e8ff2a84SJ. Bruce Fields return retval; 11341da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1135d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1136d5c3428bSJ. Bruce Fields if (retval) 1137d5c3428bSJ. Bruce Fields goto out_free_stat; 1138dbf847ecSJ. Bruce Fields retval = nfsd_export_init(); 1139dbf847ecSJ. Bruce Fields if (retval) 1140dbf847ecSJ. Bruce Fields goto out_free_cache; 11411da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1142dbf847ecSJ. Bruce Fields retval = nfsd_idmap_init(); 1143dbf847ecSJ. Bruce Fields if (retval) 1144dbf847ecSJ. Bruce Fields goto out_free_lockd; 1145e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1146e331f606SJ. Bruce Fields if (retval) 1147e331f606SJ. Bruce Fields goto out_free_idmap; 11481da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 114926808d3fSJ. Bruce Fields if (retval) 115026808d3fSJ. Bruce Fields goto out_free_all; 115126808d3fSJ. Bruce Fields return 0; 115226808d3fSJ. Bruce Fields out_free_all: 11531da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 11541da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1155e331f606SJ. Bruce Fields out_free_idmap: 1156dbf847ecSJ. Bruce Fields nfsd_idmap_shutdown(); 1157dbf847ecSJ. Bruce Fields out_free_lockd: 11581da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1159e331f606SJ. Bruce Fields nfsd_export_shutdown(); 1160dbf847ecSJ. Bruce Fields out_free_cache: 1161e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1162d5c3428bSJ. Bruce Fields out_free_stat: 1163d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 116446b25895SJ. Bruce Fields nfsd4_free_slabs(); 11651da177e4SLinus Torvalds return retval; 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds 11681da177e4SLinus Torvalds static void __exit exit_nfsd(void) 11691da177e4SLinus Torvalds { 11701da177e4SLinus Torvalds nfsd_export_shutdown(); 1171d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 11721da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 11731da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 11741da177e4SLinus Torvalds nfsd_stat_shutdown(); 11751da177e4SLinus Torvalds nfsd_lockd_shutdown(); 11761da177e4SLinus Torvalds nfsd_idmap_shutdown(); 1177e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 11781da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 11821da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 11831da177e4SLinus Torvalds module_init(init_nfsd) 11841da177e4SLinus Torvalds module_exit(exit_nfsd) 1185