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> 10*96a374a3SDavid Howells #include <linux/fs_context.h> 111da177e4SLinus Torvalds 1280212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 134373ea84SWendy Cheng #include <linux/lockd/lockd.h> 145976687aSJeff Layton #include <linux/sunrpc/addr.h> 15b0b0c0a2SKevin Coffman #include <linux/sunrpc/gss_api.h> 16b084f598SJ. Bruce Fields #include <linux/sunrpc/gss_krb5_enctypes.h> 17813fd320SJeff Layton #include <linux/sunrpc/rpc_pipe_fs.h> 18143cb494SPaul Gortmaker #include <linux/module.h> 191da177e4SLinus Torvalds 202ca72e17SJ. Bruce Fields #include "idmap.h" 219a74af21SBoaz Harrosh #include "nfsd.h" 229a74af21SBoaz Harrosh #include "cache.h" 23f3c7521fSBryan Schumaker #include "state.h" 247ea34ac1SJeff Layton #include "netns.h" 259cf514ccSChristoph Hellwig #include "pnfs.h" 269a74af21SBoaz Harrosh 271da177e4SLinus Torvalds /* 28b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 291da177e4SLinus Torvalds */ 301da177e4SLinus Torvalds enum { 311da177e4SLinus Torvalds NFSD_Root = 1, 321da177e4SLinus Torvalds NFSD_List, 33e8e8753fSJ. Bruce Fields NFSD_Export_features, 341da177e4SLinus Torvalds NFSD_Fh, 354373ea84SWendy Cheng NFSD_FO_UnlockIP, 3617efa372SWendy Cheng NFSD_FO_UnlockFS, 371da177e4SLinus Torvalds NFSD_Threads, 38eed2965aSGreg Banks NFSD_Pool_Threads, 3903cf6c9fSGreg Banks NFSD_Pool_Stats, 40a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 4170c3b76cSNeilBrown NFSD_Versions, 4280212d59SNeilBrown NFSD_Ports, 43596bbe53SNeilBrown NFSD_MaxBlkSize, 445b8db00bSJeff Layton NFSD_MaxConnections, 45b0b0c0a2SKevin Coffman NFSD_SupportedEnctypes, 4670c3b76cSNeilBrown /* 4770c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4870c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 4970c3b76cSNeilBrown */ 5070c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 511da177e4SLinus Torvalds NFSD_Leasetime, 52efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 530964a3d3SNeilBrown NFSD_RecoveryDir, 547f5ef2e9SJeff Layton NFSD_V4EndGrace, 5570c3b76cSNeilBrown #endif 561da177e4SLinus Torvalds }; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* 591da177e4SLinus Torvalds * write() for these nodes. 601da177e4SLinus Torvalds */ 611da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 62b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 63b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 641da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 65eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 6670c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 6780212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 68596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 695b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 7070c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 711da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 72efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 730964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 747f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 7570c3b76cSNeilBrown #endif 761da177e4SLinus Torvalds 77c2cdc2abSEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 781da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 79b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 80b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 811da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 82eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 8370c3b76cSNeilBrown [NFSD_Versions] = write_versions, 8480212d59SNeilBrown [NFSD_Ports] = write_ports, 85596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 865b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 8770c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 881da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 89efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 900964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 917f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 9270c3b76cSNeilBrown #endif 931da177e4SLinus Torvalds }; 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 961da177e4SLinus Torvalds { 97496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 981da177e4SLinus Torvalds char *data; 991da177e4SLinus Torvalds ssize_t rv; 1001da177e4SLinus Torvalds 101e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1021da177e4SLinus Torvalds return -EINVAL; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1051da177e4SLinus Torvalds if (IS_ERR(data)) 1061da177e4SLinus Torvalds return PTR_ERR(data); 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1098971a101SNeilBrown if (rv >= 0) { 1101da177e4SLinus Torvalds simple_transaction_set(file, rv); 1111da177e4SLinus Torvalds rv = size; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds return rv; 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds 1167390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1177390022dSNeilBrown { 1187390022dSNeilBrown if (! file->private_data) { 1197390022dSNeilBrown /* An attempt to read a transaction file without writing 1207390022dSNeilBrown * causes a 0-byte write so that the file can return 1217390022dSNeilBrown * state information 1227390022dSNeilBrown */ 1237390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1247390022dSNeilBrown if (rv < 0) 1257390022dSNeilBrown return rv; 1267390022dSNeilBrown } 1277390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1287390022dSNeilBrown } 1297390022dSNeilBrown 1304b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1311da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1327390022dSNeilBrown .read = nfsctl_transaction_read, 1331da177e4SLinus Torvalds .release = simple_transaction_release, 1346038f373SArnd Bergmann .llseek = default_llseek, 1351da177e4SLinus Torvalds }; 1361da177e4SLinus Torvalds 13796d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1381da177e4SLinus Torvalds { 139f2c7ea10SStanislav Kinsbursky int err; 140f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 14196d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 142f2c7ea10SStanislav Kinsbursky 143f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 144f2c7ea10SStanislav Kinsbursky if (err) 145f2c7ea10SStanislav Kinsbursky return err; 146f2c7ea10SStanislav Kinsbursky 147f2c7ea10SStanislav Kinsbursky seq = file->private_data; 148e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 149f2c7ea10SStanislav Kinsbursky return 0; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 15296d851c4SStanislav Kinsbursky static int exports_proc_open(struct inode *inode, struct file *file) 15396d851c4SStanislav Kinsbursky { 15496d851c4SStanislav Kinsbursky return exports_net_open(current->nsproxy->net_ns, file); 15596d851c4SStanislav Kinsbursky } 15696d851c4SStanislav Kinsbursky 15796d851c4SStanislav Kinsbursky static const struct file_operations exports_proc_operations = { 15896d851c4SStanislav Kinsbursky .open = exports_proc_open, 15996d851c4SStanislav Kinsbursky .read = seq_read, 16096d851c4SStanislav Kinsbursky .llseek = seq_lseek, 16196d851c4SStanislav Kinsbursky .release = seq_release, 16296d851c4SStanislav Kinsbursky }; 16396d851c4SStanislav Kinsbursky 16496d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 16596d851c4SStanislav Kinsbursky { 16696d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 16796d851c4SStanislav Kinsbursky } 16896d851c4SStanislav Kinsbursky 16996d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 17096d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1711da177e4SLinus Torvalds .read = seq_read, 1721da177e4SLinus Torvalds .llseek = seq_lseek, 1731da177e4SLinus Torvalds .release = seq_release, 1741da177e4SLinus Torvalds }; 1751da177e4SLinus Torvalds 176e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 177e8e8753fSJ. Bruce Fields { 178e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 179e8e8753fSJ. Bruce Fields return 0; 180e8e8753fSJ. Bruce Fields } 181e8e8753fSJ. Bruce Fields 182e8e8753fSJ. Bruce Fields static int export_features_open(struct inode *inode, struct file *file) 183e8e8753fSJ. Bruce Fields { 184e8e8753fSJ. Bruce Fields return single_open(file, export_features_show, NULL); 185e8e8753fSJ. Bruce Fields } 186e8e8753fSJ. Bruce Fields 18775ef9de1SAl Viro static const struct file_operations export_features_operations = { 188e8e8753fSJ. Bruce Fields .open = export_features_open, 189e8e8753fSJ. Bruce Fields .read = seq_read, 190e8e8753fSJ. Bruce Fields .llseek = seq_lseek, 191e8e8753fSJ. Bruce Fields .release = single_release, 192e8e8753fSJ. Bruce Fields }; 193e8e8753fSJ. Bruce Fields 194b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 195b0b0c0a2SKevin Coffman static int supported_enctypes_show(struct seq_file *m, void *v) 196b0b0c0a2SKevin Coffman { 197b084f598SJ. Bruce Fields seq_printf(m, KRB5_SUPPORTED_ENCTYPES); 198b0b0c0a2SKevin Coffman return 0; 199b0b0c0a2SKevin Coffman } 200b0b0c0a2SKevin Coffman 201b0b0c0a2SKevin Coffman static int supported_enctypes_open(struct inode *inode, struct file *file) 202b0b0c0a2SKevin Coffman { 203b0b0c0a2SKevin Coffman return single_open(file, supported_enctypes_show, NULL); 204b0b0c0a2SKevin Coffman } 205b0b0c0a2SKevin Coffman 20675ef9de1SAl Viro static const struct file_operations supported_enctypes_ops = { 207b0b0c0a2SKevin Coffman .open = supported_enctypes_open, 208b0b0c0a2SKevin Coffman .read = seq_read, 209b0b0c0a2SKevin Coffman .llseek = seq_lseek, 210b0b0c0a2SKevin Coffman .release = single_release, 211b0b0c0a2SKevin Coffman }; 212b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 213b0b0c0a2SKevin Coffman 214828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 21503cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 21603cf6c9fSGreg Banks .read = seq_read, 21703cf6c9fSGreg Banks .llseek = seq_lseek, 218ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 21903cf6c9fSGreg Banks }; 22003cf6c9fSGreg Banks 2217ba630f5SJulia Lawall static const struct file_operations reply_cache_stats_operations = { 222a2f999a3SJeff Layton .open = nfsd_reply_cache_stats_open, 223a2f999a3SJeff Layton .read = seq_read, 224a2f999a3SJeff Layton .llseek = seq_lseek, 225a2f999a3SJeff Layton .release = single_release, 226a2f999a3SJeff Layton }; 227a2f999a3SJeff Layton 2281da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 2291da177e4SLinus Torvalds /* 2301da177e4SLinus Torvalds * payload - write methods 2311da177e4SLinus Torvalds */ 2321da177e4SLinus Torvalds 233244c7d44SAl Viro static inline struct net *netns(struct file *file) 234244c7d44SAl Viro { 235244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 236244c7d44SAl Viro } 2371da177e4SLinus Torvalds 238262a0982SChuck Lever /** 239262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 240262a0982SChuck Lever * 241262a0982SChuck Lever * Experimental. 242262a0982SChuck Lever * 243262a0982SChuck Lever * Input: 244262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2454116092bSChuck Lever * presentation format IP address 246262a0982SChuck Lever * size: length of C string in @buf 247262a0982SChuck Lever * Output: 248262a0982SChuck Lever * On success: returns zero if all specified locks were released; 249262a0982SChuck Lever * returns one if one or more locks were not released 250262a0982SChuck Lever * On error: return code is negative errno value 251262a0982SChuck Lever */ 252b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2534373ea84SWendy Cheng { 2544116092bSChuck Lever struct sockaddr_storage address; 2554116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2564116092bSChuck Lever size_t salen = sizeof(address); 257367c8c7bSChuck Lever char *fo_path; 258244c7d44SAl Viro struct net *net = netns(file); 2594373ea84SWendy Cheng 2604373ea84SWendy Cheng /* sanity check */ 2614373ea84SWendy Cheng if (size == 0) 2624373ea84SWendy Cheng return -EINVAL; 2634373ea84SWendy Cheng 2644373ea84SWendy Cheng if (buf[size-1] != '\n') 2654373ea84SWendy Cheng return -EINVAL; 2664373ea84SWendy Cheng 2674373ea84SWendy Cheng fo_path = buf; 2684373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2694373ea84SWendy Cheng return -EINVAL; 2704373ea84SWendy Cheng 27111f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2724373ea84SWendy Cheng return -EINVAL; 2734373ea84SWendy Cheng 2744116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2754373ea84SWendy Cheng } 2764373ea84SWendy Cheng 277262a0982SChuck Lever /** 278262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 279262a0982SChuck Lever * 280262a0982SChuck Lever * Experimental. 281262a0982SChuck Lever * 282262a0982SChuck Lever * Input: 283262a0982SChuck Lever * buf: '\n'-terminated C string containing the 284262a0982SChuck Lever * absolute pathname of a local file system 285262a0982SChuck Lever * size: length of C string in @buf 286262a0982SChuck Lever * Output: 287262a0982SChuck Lever * On success: returns zero if all specified locks were released; 288262a0982SChuck Lever * returns one if one or more locks were not released 289262a0982SChuck Lever * On error: return code is negative errno value 290262a0982SChuck Lever */ 291b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 29217efa372SWendy Cheng { 293a63bb996SAl Viro struct path path; 29417efa372SWendy Cheng char *fo_path; 29517efa372SWendy Cheng int error; 29617efa372SWendy Cheng 29717efa372SWendy Cheng /* sanity check */ 29817efa372SWendy Cheng if (size == 0) 29917efa372SWendy Cheng return -EINVAL; 30017efa372SWendy Cheng 30117efa372SWendy Cheng if (buf[size-1] != '\n') 30217efa372SWendy Cheng return -EINVAL; 30317efa372SWendy Cheng 30417efa372SWendy Cheng fo_path = buf; 30517efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 30617efa372SWendy Cheng return -EINVAL; 30717efa372SWendy Cheng 308a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 30917efa372SWendy Cheng if (error) 31017efa372SWendy Cheng return error; 31117efa372SWendy Cheng 312262a0982SChuck Lever /* 313262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 314262a0982SChuck Lever * releasing locks on the wrong file system. 315262a0982SChuck Lever * 316262a0982SChuck Lever * For example: 317262a0982SChuck Lever * 1. Does the path refer to a directory? 318262a0982SChuck Lever * 2. Is that directory a mount point, or 319262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 320262a0982SChuck Lever */ 321d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 32217efa372SWendy Cheng 323a63bb996SAl Viro path_put(&path); 32417efa372SWendy Cheng return error; 32517efa372SWendy Cheng } 32617efa372SWendy Cheng 327262a0982SChuck Lever /** 328262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 329262a0982SChuck Lever * 330262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 331262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 332262a0982SChuck Lever * contain escape sequences. 333262a0982SChuck Lever * 334262a0982SChuck Lever * Input: 335262a0982SChuck Lever * buf: 336262a0982SChuck Lever * domain: client domain name 337262a0982SChuck Lever * path: export pathname 338262a0982SChuck Lever * maxsize: numeric maximum size of 339262a0982SChuck Lever * @buf 340262a0982SChuck Lever * size: length of C string in @buf 341262a0982SChuck Lever * Output: 342262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 343262a0982SChuck Lever * string containing a ASCII hex text version 344262a0982SChuck Lever * of the NFS file handle; 345262a0982SChuck Lever * return code is the size in bytes of the string 346262a0982SChuck Lever * On error: return code is negative errno value 347262a0982SChuck Lever */ 3481da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds char *dname, *path; 351246d95baSAndrew Morton int uninitialized_var(maxsize); 3521da177e4SLinus Torvalds char *mesg = buf; 3531da177e4SLinus Torvalds int len; 3541da177e4SLinus Torvalds struct auth_domain *dom; 3551da177e4SLinus Torvalds struct knfsd_fh fh; 3561da177e4SLinus Torvalds 35787d26ea7SJ. Bruce Fields if (size == 0) 35887d26ea7SJ. Bruce Fields return -EINVAL; 35987d26ea7SJ. Bruce Fields 3601da177e4SLinus Torvalds if (buf[size-1] != '\n') 3611da177e4SLinus Torvalds return -EINVAL; 3621da177e4SLinus Torvalds buf[size-1] = 0; 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds dname = mesg; 3651da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 36654224f04SChuck Lever if (len <= 0) 36754224f04SChuck Lever return -EINVAL; 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds path = dname+len+1; 3701da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 37154224f04SChuck Lever if (len <= 0) 37254224f04SChuck Lever return -EINVAL; 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3751da177e4SLinus Torvalds if (len) 3761da177e4SLinus Torvalds return len; 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3791da177e4SLinus Torvalds return -EINVAL; 3803c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3831da177e4SLinus Torvalds return -EINVAL; 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3861da177e4SLinus Torvalds dom = unix_domain_find(dname); 3871da177e4SLinus Torvalds if (!dom) 3881da177e4SLinus Torvalds return -ENOMEM; 3891da177e4SLinus Torvalds 390244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3911da177e4SLinus Torvalds auth_domain_put(dom); 3921da177e4SLinus Torvalds if (len) 3931da177e4SLinus Torvalds return len; 3941da177e4SLinus Torvalds 39554224f04SChuck Lever mesg = buf; 39654224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 3971da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 3981da177e4SLinus Torvalds mesg[-1] = '\n'; 3991da177e4SLinus Torvalds return mesg - buf; 4001da177e4SLinus Torvalds } 4011da177e4SLinus Torvalds 402262a0982SChuck Lever /** 403262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 404262a0982SChuck Lever * 405262a0982SChuck Lever * Input: 406262a0982SChuck Lever * buf: ignored 407262a0982SChuck Lever * size: zero 408262a0982SChuck Lever * Output: 409262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 410262a0982SChuck Lever * string numeric value representing the number of 411262a0982SChuck Lever * running NFSD threads; 412262a0982SChuck Lever * return code is the size in bytes of the string 413262a0982SChuck Lever * On error: return code is zero 414262a0982SChuck Lever * 415262a0982SChuck Lever * OR 416262a0982SChuck Lever * 417262a0982SChuck Lever * Input: 418262a0982SChuck Lever * buf: C string containing an unsigned 419262a0982SChuck Lever * integer value representing the 420262a0982SChuck Lever * number of NFSD threads to start 421262a0982SChuck Lever * size: non-zero length of C string in @buf 422262a0982SChuck Lever * Output: 423262a0982SChuck Lever * On success: NFS service is started; 424262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 425262a0982SChuck Lever * string numeric value representing the number of 426262a0982SChuck Lever * running NFSD threads; 427262a0982SChuck Lever * return code is the size in bytes of the string 428262a0982SChuck Lever * On error: return code is zero or a negative errno value 429262a0982SChuck Lever */ 4301da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 4311da177e4SLinus Torvalds { 4321da177e4SLinus Torvalds char *mesg = buf; 4331da177e4SLinus Torvalds int rv; 434244c7d44SAl Viro struct net *net = netns(file); 435d41a9417SStanislav Kinsbursky 4361da177e4SLinus Torvalds if (size > 0) { 4371da177e4SLinus Torvalds int newthreads; 4381da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4391da177e4SLinus Torvalds if (rv) 4401da177e4SLinus Torvalds return rv; 4411da177e4SLinus Torvalds if (newthreads < 0) 4421da177e4SLinus Torvalds return -EINVAL; 4434df493a2STrond Myklebust rv = nfsd_svc(newthreads, net, file->f_cred); 44482e12fe9SNeilBrown if (rv < 0) 4451da177e4SLinus Torvalds return rv; 44682e12fe9SNeilBrown } else 4479dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 448e06b6405SChuck Lever 44982e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 452262a0982SChuck Lever /** 453262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 454262a0982SChuck Lever * 455262a0982SChuck Lever * Input: 456262a0982SChuck Lever * buf: ignored 457262a0982SChuck Lever * size: zero 458262a0982SChuck Lever * 459262a0982SChuck Lever * OR 460262a0982SChuck Lever * 461262a0982SChuck Lever * Input: 462262a0982SChuck Lever * buf: C string containing whitespace- 463262a0982SChuck Lever * separated unsigned integer values 464262a0982SChuck Lever * representing the number of NFSD 465262a0982SChuck Lever * threads to start in each pool 466262a0982SChuck Lever * size: non-zero length of C string in @buf 467262a0982SChuck Lever * Output: 468262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 469262a0982SChuck Lever * string containing integer values representing the 470262a0982SChuck Lever * number of NFSD threads in each pool; 471262a0982SChuck Lever * return code is the size in bytes of the string 472262a0982SChuck Lever * On error: return code is zero or a negative errno value 473262a0982SChuck Lever */ 474eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 475eed2965aSGreg Banks { 476eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 477eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 478eed2965aSGreg Banks */ 479eed2965aSGreg Banks char *mesg = buf; 480eed2965aSGreg Banks int i; 481eed2965aSGreg Banks int rv; 482eed2965aSGreg Banks int len; 483bedbdd8bSNeil Brown int npools; 484eed2965aSGreg Banks int *nthreads; 485244c7d44SAl Viro struct net *net = netns(file); 486eed2965aSGreg Banks 487bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4889dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 489eed2965aSGreg Banks if (npools == 0) { 490eed2965aSGreg Banks /* 491eed2965aSGreg Banks * NFS is shut down. The admin can start it by 492eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 493eed2965aSGreg Banks * file, sorry. Report zero threads. 494eed2965aSGreg Banks */ 495bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 496eed2965aSGreg Banks strcpy(buf, "0\n"); 497eed2965aSGreg Banks return strlen(buf); 498eed2965aSGreg Banks } 499eed2965aSGreg Banks 500eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 501bedbdd8bSNeil Brown rv = -ENOMEM; 502eed2965aSGreg Banks if (nthreads == NULL) 503bedbdd8bSNeil Brown goto out_free; 504eed2965aSGreg Banks 505eed2965aSGreg Banks if (size > 0) { 506eed2965aSGreg Banks for (i = 0; i < npools; i++) { 507eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 508eed2965aSGreg Banks if (rv == -ENOENT) 509eed2965aSGreg Banks break; /* fewer numbers than pools */ 510eed2965aSGreg Banks if (rv) 511eed2965aSGreg Banks goto out_free; /* syntax error */ 512eed2965aSGreg Banks rv = -EINVAL; 513eed2965aSGreg Banks if (nthreads[i] < 0) 514eed2965aSGreg Banks goto out_free; 515eed2965aSGreg Banks } 5163938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 517eed2965aSGreg Banks if (rv) 518eed2965aSGreg Banks goto out_free; 519eed2965aSGreg Banks } 520eed2965aSGreg Banks 5219dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 522eed2965aSGreg Banks if (rv) 523eed2965aSGreg Banks goto out_free; 524eed2965aSGreg Banks 525eed2965aSGreg Banks mesg = buf; 526eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 527eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 528eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 529eed2965aSGreg Banks len = strlen(mesg); 530eed2965aSGreg Banks size -= len; 531eed2965aSGreg Banks mesg += len; 532eed2965aSGreg Banks } 533413d63d7SJ. Bruce Fields rv = mesg - buf; 534eed2965aSGreg Banks out_free: 535eed2965aSGreg Banks kfree(nthreads); 536bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 537eed2965aSGreg Banks return rv; 538eed2965aSGreg Banks } 539eed2965aSGreg Banks 540ff7d1179STrond Myklebust static ssize_t 541e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 542e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 543ff7d1179STrond Myklebust { 544abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 545e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 546ff7d1179STrond Myklebust 547abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 548e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 549ff7d1179STrond Myklebust supported = false; 550abcb4dacSNeilBrown if (minor == 0 && supported) 551abcb4dacSNeilBrown /* 552abcb4dacSNeilBrown * special case for backward compatability. 553abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 554abcb4dacSNeilBrown * +4, unless -4.0 is present. 555abcb4dacSNeilBrown */ 556abcb4dacSNeilBrown return 0; 557ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 558ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 559ff7d1179STrond Myklebust } 560ff7d1179STrond Myklebust 5613dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 56270c3b76cSNeilBrown { 56370c3b76cSNeilBrown char *mesg = buf; 5648daf220aSBenny Halevy char *vers, *minorp, sign; 565261758b5SChuck Lever int len, num, remaining; 56670c3b76cSNeilBrown ssize_t tlen = 0; 56770c3b76cSNeilBrown char *sep; 568244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 56970c3b76cSNeilBrown 57070c3b76cSNeilBrown if (size>0) { 5719dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5726658d3a7SNeilBrown /* Cannot change versions without updating 5739dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5746658d3a7SNeilBrown * rq_argp and rq_resp 5756658d3a7SNeilBrown */ 57670c3b76cSNeilBrown return -EBUSY; 57770c3b76cSNeilBrown if (buf[size-1] != '\n') 57870c3b76cSNeilBrown return -EINVAL; 57970c3b76cSNeilBrown buf[size-1] = 0; 58070c3b76cSNeilBrown 58170c3b76cSNeilBrown vers = mesg; 58270c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 58370c3b76cSNeilBrown if (len <= 0) return -EINVAL; 58470c3b76cSNeilBrown do { 585d3635ff0STrond Myklebust enum vers_op cmd; 586abcb4dacSNeilBrown unsigned minor; 58770c3b76cSNeilBrown sign = *vers; 58870c3b76cSNeilBrown if (sign == '+' || sign == '-') 5898daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 59070c3b76cSNeilBrown else 5918daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5928daf220aSBenny Halevy if (*minorp == '.') { 593ff89be87SJ. Bruce Fields if (num != 4) 5948daf220aSBenny Halevy return -EINVAL; 595e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5968daf220aSBenny Halevy return -EINVAL; 597abcb4dacSNeilBrown } 598abcb4dacSNeilBrown 599d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 60070c3b76cSNeilBrown switch(num) { 60170c3b76cSNeilBrown case 2: 60270c3b76cSNeilBrown case 3: 603e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 604d3635ff0STrond Myklebust break; 60570c3b76cSNeilBrown case 4: 606abcb4dacSNeilBrown if (*minorp == '.') { 607e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 608abcb4dacSNeilBrown return -EINVAL; 609e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 610abcb4dacSNeilBrown /* 611abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 612abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 613abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 614abcb4dacSNeilBrown */ 615abcb4dacSNeilBrown minor = 0; 616e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 617abcb4dacSNeilBrown minor++; 618abcb4dacSNeilBrown } 61970c3b76cSNeilBrown break; 62070c3b76cSNeilBrown default: 62170c3b76cSNeilBrown return -EINVAL; 62270c3b76cSNeilBrown } 62370c3b76cSNeilBrown vers += len + 1; 62470c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 62570c3b76cSNeilBrown /* If all get turned off, turn them back on, as 62670c3b76cSNeilBrown * having no versions is BAD 62770c3b76cSNeilBrown */ 628e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 62970c3b76cSNeilBrown } 630261758b5SChuck Lever 63170c3b76cSNeilBrown /* Now write current state into reply buffer */ 63270c3b76cSNeilBrown len = 0; 63370c3b76cSNeilBrown sep = ""; 634261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 635ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 636abcb4dacSNeilBrown int minor; 637e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 638e35659f1SNeilBrown continue; 639abcb4dacSNeilBrown 640abcb4dacSNeilBrown minor = -1; 641ff7d1179STrond Myklebust do { 642e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 643ff7d1179STrond Myklebust sep, num, minor); 644818f2f57SDan Carpenter if (len >= remaining) 645ff7d1179STrond Myklebust goto out; 646261758b5SChuck Lever remaining -= len; 647261758b5SChuck Lever buf += len; 648261758b5SChuck Lever tlen += len; 649ff7d1179STrond Myklebust minor++; 650abcb4dacSNeilBrown if (len) 651ff7d1179STrond Myklebust sep = " "; 652ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 653261758b5SChuck Lever } 654ff7d1179STrond Myklebust out: 655261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 656818f2f57SDan Carpenter if (len >= remaining) 657261758b5SChuck Lever return -EINVAL; 658261758b5SChuck Lever return tlen + len; 65970c3b76cSNeilBrown } 66070c3b76cSNeilBrown 661262a0982SChuck Lever /** 662262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 663262a0982SChuck Lever * 664262a0982SChuck Lever * Input: 665262a0982SChuck Lever * buf: ignored 666262a0982SChuck Lever * size: zero 667262a0982SChuck Lever * Output: 668262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 669262a0982SChuck Lever * string containing positive or negative integer 670262a0982SChuck Lever * values representing the current status of each 671262a0982SChuck Lever * protocol version; 672262a0982SChuck Lever * return code is the size in bytes of the string 673262a0982SChuck Lever * On error: return code is zero or a negative errno value 674262a0982SChuck Lever * 675262a0982SChuck Lever * OR 676262a0982SChuck Lever * 677262a0982SChuck Lever * Input: 678262a0982SChuck Lever * buf: C string containing whitespace- 679262a0982SChuck Lever * separated positive or negative 680262a0982SChuck Lever * integer values representing NFS 681262a0982SChuck Lever * protocol versions to enable ("+n") 682262a0982SChuck Lever * or disable ("-n") 683262a0982SChuck Lever * size: non-zero length of C string in @buf 684262a0982SChuck Lever * Output: 685262a0982SChuck Lever * On success: status of zero or more protocol versions has 686262a0982SChuck Lever * been updated; passed-in buffer filled with 687262a0982SChuck Lever * '\n'-terminated C string containing positive 688262a0982SChuck Lever * or negative integer values representing the 689262a0982SChuck Lever * current status of each protocol version; 690262a0982SChuck Lever * return code is the size in bytes of the string 691262a0982SChuck Lever * On error: return code is zero or a negative errno value 692262a0982SChuck Lever */ 6933dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6943dd98a3bSJeff Layton { 6953dd98a3bSJeff Layton ssize_t rv; 6963dd98a3bSJeff Layton 6973dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6983dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6993dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 7003dd98a3bSJeff Layton return rv; 7013dd98a3bSJeff Layton } 7023dd98a3bSJeff Layton 7034cd5dc75SChuck Lever /* 7040a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 7050a5372d8SChuck Lever * transports. 7060a5372d8SChuck Lever */ 7079dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 7080a5372d8SChuck Lever { 7099dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7109dd9845fSStanislav Kinsbursky 7119dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 7120a5372d8SChuck Lever return 0; 7139dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 7140a5372d8SChuck Lever } 7150a5372d8SChuck Lever 7160a5372d8SChuck Lever /* 7170b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 7180b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 7190b7c2f6fSChuck Lever * nfsd listener. 7200b7c2f6fSChuck Lever */ 7214df493a2STrond Myklebust static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 7220b7c2f6fSChuck Lever { 7230b7c2f6fSChuck Lever char *mesg = buf; 7240b7c2f6fSChuck Lever int fd, err; 7259dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7260b7c2f6fSChuck Lever 7270b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 7280b7c2f6fSChuck Lever if (err != 0 || fd < 0) 7290b7c2f6fSChuck Lever return -EINVAL; 7300b7c2f6fSChuck Lever 73130646394SStanislav Kinsbursky if (svc_alien_sock(net, fd)) { 73230646394SStanislav Kinsbursky printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); 73330646394SStanislav Kinsbursky return -EINVAL; 73430646394SStanislav Kinsbursky } 73530646394SStanislav Kinsbursky 7366777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7370b7c2f6fSChuck Lever if (err != 0) 7380b7c2f6fSChuck Lever return err; 7390b7c2f6fSChuck Lever 7404df493a2STrond Myklebust err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 74178a8d7c8SJeff Layton if (err < 0) { 74219f7e2caSStanislav Kinsbursky nfsd_destroy(net); 74378a8d7c8SJeff Layton return err; 74478a8d7c8SJeff Layton } 745ea068badSChuck Lever 7460b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 7479dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 748ea068badSChuck Lever return err; 7490b7c2f6fSChuck Lever } 7500b7c2f6fSChuck Lever 7510b7c2f6fSChuck Lever /* 7524eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 7534eb68c26SChuck Lever * a port number. 7544eb68c26SChuck Lever */ 7554df493a2STrond Myklebust static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 7564eb68c26SChuck Lever { 7574eb68c26SChuck Lever char transport[16]; 75837498292SChuck Lever struct svc_xprt *xprt; 7594eb68c26SChuck Lever int port, err; 7609dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7614eb68c26SChuck Lever 762a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7634eb68c26SChuck Lever return -EINVAL; 7644eb68c26SChuck Lever 7654be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7664eb68c26SChuck Lever return -EINVAL; 7674eb68c26SChuck Lever 7686777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7694eb68c26SChuck Lever if (err != 0) 7704eb68c26SChuck Lever return err; 7714eb68c26SChuck Lever 7729dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 7734df493a2STrond Myklebust PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 77468717908SChuck Lever if (err < 0) 77537498292SChuck Lever goto out_err; 77637498292SChuck Lever 7779dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 7784df493a2STrond Myklebust PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 77937498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 78037498292SChuck Lever goto out_close; 7810cd14a06SJeff Layton 7820cd14a06SJeff Layton /* Decrease the count, but don't shut down the service */ 7839dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 7844eb68c26SChuck Lever return 0; 78537498292SChuck Lever out_close: 7869dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 78737498292SChuck Lever if (xprt != NULL) { 78837498292SChuck Lever svc_close_xprt(xprt); 78937498292SChuck Lever svc_xprt_put(xprt); 79037498292SChuck Lever } 79137498292SChuck Lever out_err: 79219f7e2caSStanislav Kinsbursky nfsd_destroy(net); 79337498292SChuck Lever return err; 7944eb68c26SChuck Lever } 7954eb68c26SChuck Lever 79608160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 79708160352SStanislav Kinsbursky struct net *net) 79880212d59SNeilBrown { 7990a5372d8SChuck Lever if (size == 0) 8009dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 8010b7c2f6fSChuck Lever 8020b7c2f6fSChuck Lever if (isdigit(buf[0])) 8034df493a2STrond Myklebust return __write_ports_addfd(buf, net, file->f_cred); 80482d56591SChuck Lever 8054eb68c26SChuck Lever if (isalpha(buf[0])) 8064df493a2STrond Myklebust return __write_ports_addxprt(buf, net, file->f_cred); 8074cd5dc75SChuck Lever 808b41b66d6SNeilBrown return -EINVAL; 809b41b66d6SNeilBrown } 81080212d59SNeilBrown 811262a0982SChuck Lever /** 812262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 813262a0982SChuck Lever * 814262a0982SChuck Lever * Input: 815262a0982SChuck Lever * buf: ignored 816262a0982SChuck Lever * size: zero 817262a0982SChuck Lever * Output: 818262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 819262a0982SChuck Lever * string containing a whitespace-separated list of 820262a0982SChuck Lever * named NFSD listeners; 821262a0982SChuck Lever * return code is the size in bytes of the string 822262a0982SChuck Lever * On error: return code is zero or a negative errno value 823262a0982SChuck Lever * 824262a0982SChuck Lever * OR 825262a0982SChuck Lever * 826262a0982SChuck Lever * Input: 827262a0982SChuck Lever * buf: C string containing an unsigned 828262a0982SChuck Lever * integer value representing a bound 829262a0982SChuck Lever * but unconnected socket that is to be 830c71206a7SChuck Lever * used as an NFSD listener; listen(3) 831c71206a7SChuck Lever * must be called for a SOCK_STREAM 832c71206a7SChuck Lever * socket, otherwise it is ignored 833262a0982SChuck Lever * size: non-zero length of C string in @buf 834262a0982SChuck Lever * Output: 835262a0982SChuck Lever * On success: NFS service is started; 836262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 837262a0982SChuck Lever * string containing a unique alphanumeric name of 838262a0982SChuck Lever * the listener; 839262a0982SChuck Lever * return code is the size in bytes of the string 840262a0982SChuck Lever * On error: return code is a negative errno value 841262a0982SChuck Lever * 842262a0982SChuck Lever * OR 843262a0982SChuck Lever * 844262a0982SChuck Lever * Input: 845262a0982SChuck Lever * buf: C string containing a transport 846262a0982SChuck Lever * name and an unsigned integer value 847262a0982SChuck Lever * representing the port to listen on, 848262a0982SChuck Lever * separated by whitespace 849262a0982SChuck Lever * size: non-zero length of C string in @buf 850262a0982SChuck Lever * Output: 851262a0982SChuck Lever * On success: returns zero; NFS service is started 852262a0982SChuck Lever * On error: return code is a negative errno value 853262a0982SChuck Lever */ 854bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 855bedbdd8bSNeil Brown { 856bedbdd8bSNeil Brown ssize_t rv; 8573dd98a3bSJeff Layton 858bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 859244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 860bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 861bedbdd8bSNeil Brown return rv; 862bedbdd8bSNeil Brown } 863bedbdd8bSNeil Brown 864bedbdd8bSNeil Brown 865596bbe53SNeilBrown int nfsd_max_blksize; 866596bbe53SNeilBrown 867262a0982SChuck Lever /** 868262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 869262a0982SChuck Lever * 870262a0982SChuck Lever * Input: 871262a0982SChuck Lever * buf: ignored 872262a0982SChuck Lever * size: zero 873262a0982SChuck Lever * 874262a0982SChuck Lever * OR 875262a0982SChuck Lever * 876262a0982SChuck Lever * Input: 877262a0982SChuck Lever * buf: C string containing an unsigned 878262a0982SChuck Lever * integer value representing the new 879262a0982SChuck Lever * NFS blksize 880262a0982SChuck Lever * size: non-zero length of C string in @buf 881262a0982SChuck Lever * Output: 882262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 883262a0982SChuck Lever * containing numeric value of the current NFS blksize 884262a0982SChuck Lever * setting; 885262a0982SChuck Lever * return code is the size in bytes of the string 886262a0982SChuck Lever * On error: return code is zero or a negative errno value 887262a0982SChuck Lever */ 888596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 889596bbe53SNeilBrown { 890596bbe53SNeilBrown char *mesg = buf; 891244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8929dd9845fSStanislav Kinsbursky 893596bbe53SNeilBrown if (size > 0) { 894596bbe53SNeilBrown int bsize; 895596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 896596bbe53SNeilBrown if (rv) 897596bbe53SNeilBrown return rv; 898596bbe53SNeilBrown /* force bsize into allowed range and 899596bbe53SNeilBrown * required alignment. 900596bbe53SNeilBrown */ 9013c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 9023c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 903596bbe53SNeilBrown bsize &= ~(1024-1); 904bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 9059dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 906bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 907596bbe53SNeilBrown return -EBUSY; 908596bbe53SNeilBrown } 909596bbe53SNeilBrown nfsd_max_blksize = bsize; 910bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 911596bbe53SNeilBrown } 912e06b6405SChuck Lever 913e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 914e06b6405SChuck Lever nfsd_max_blksize); 915596bbe53SNeilBrown } 916596bbe53SNeilBrown 9175b8db00bSJeff Layton /** 9185b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 9195b8db00bSJeff Layton * 9205b8db00bSJeff Layton * Input: 9215b8db00bSJeff Layton * buf: ignored 9225b8db00bSJeff Layton * size: zero 9235b8db00bSJeff Layton * OR 9245b8db00bSJeff Layton * 9255b8db00bSJeff Layton * Input: 9265b8db00bSJeff Layton * buf: C string containing an unsigned 9275b8db00bSJeff Layton * integer value representing the new 9285b8db00bSJeff Layton * number of max connections 9295b8db00bSJeff Layton * size: non-zero length of C string in @buf 9305b8db00bSJeff Layton * Output: 9315b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9325b8db00bSJeff Layton * containing numeric value of max_connections setting 9335b8db00bSJeff Layton * for this net namespace; 9345b8db00bSJeff Layton * return code is the size in bytes of the string 9355b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9365b8db00bSJeff Layton */ 9375b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9385b8db00bSJeff Layton { 9395b8db00bSJeff Layton char *mesg = buf; 940244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9415b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9425b8db00bSJeff Layton 9435b8db00bSJeff Layton if (size > 0) { 9445b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9455b8db00bSJeff Layton 9465b8db00bSJeff Layton if (rv) 9475b8db00bSJeff Layton return rv; 9485b8db00bSJeff Layton nn->max_connections = maxconn; 9495b8db00bSJeff Layton } 9505b8db00bSJeff Layton 9515b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9525b8db00bSJeff Layton } 9535b8db00bSJeff Layton 95470c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9559dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 9569dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 9571da177e4SLinus Torvalds { 9581da177e4SLinus Torvalds char *mesg = buf; 959f0135740SJ. Bruce Fields int rv, i; 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds if (size > 0) { 9629dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9633dd98a3bSJeff Layton return -EBUSY; 964f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9651da177e4SLinus Torvalds if (rv) 9661da177e4SLinus Torvalds return rv; 967e7b184f1SJ. Bruce Fields /* 968e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 969e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 970e7b184f1SJ. Bruce Fields * extremes are: 971e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 972e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 973e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 974e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 975e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 976e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 977e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 978e7b184f1SJ. Bruce Fields */ 979f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9801da177e4SLinus Torvalds return -EINVAL; 981f0135740SJ. Bruce Fields *time = i; 9821da177e4SLinus Torvalds } 983e06b6405SChuck Lever 984f0135740SJ. Bruce Fields return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 985f0135740SJ. Bruce Fields } 986f0135740SJ. Bruce Fields 9879dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 9889dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 989f0135740SJ. Bruce Fields { 990f0135740SJ. Bruce Fields ssize_t rv; 991f0135740SJ. Bruce Fields 992f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9939dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 994f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 995f0135740SJ. Bruce Fields return rv; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds 998262a0982SChuck Lever /** 999262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 1000262a0982SChuck Lever * 1001262a0982SChuck Lever * Input: 1002262a0982SChuck Lever * buf: ignored 1003262a0982SChuck Lever * size: zero 1004262a0982SChuck Lever * 1005262a0982SChuck Lever * OR 1006262a0982SChuck Lever * 1007262a0982SChuck Lever * Input: 1008262a0982SChuck Lever * buf: C string containing an unsigned 1009262a0982SChuck Lever * integer value representing the new 1010262a0982SChuck Lever * NFSv4 lease expiry time 1011262a0982SChuck Lever * size: non-zero length of C string in @buf 1012262a0982SChuck Lever * Output: 1013262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1014262a0982SChuck Lever * string containing unsigned integer value of the 1015262a0982SChuck Lever * current lease expiry time; 1016262a0982SChuck Lever * return code is the size in bytes of the string 1017262a0982SChuck Lever * On error: return code is zero or a negative errno value 1018262a0982SChuck Lever */ 10193dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 10203dd98a3bSJeff Layton { 1021244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10229dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 10233dd98a3bSJeff Layton } 10243dd98a3bSJeff Layton 1025efc4bb4fSJ. Bruce Fields /** 1026efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1027efc4bb4fSJ. Bruce Fields * 1028efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1029efc4bb4fSJ. Bruce Fields * 1030efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1031efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1032efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1033efc4bb4fSJ. Bruce Fields * anyway.) 1034efc4bb4fSJ. Bruce Fields */ 1035efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1036efc4bb4fSJ. Bruce Fields { 1037244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10389dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1039efc4bb4fSJ. Bruce Fields } 1040efc4bb4fSJ. Bruce Fields 10419dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10429dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10430964a3d3SNeilBrown { 10440964a3d3SNeilBrown char *mesg = buf; 10450964a3d3SNeilBrown char *recdir; 10460964a3d3SNeilBrown int len, status; 10470964a3d3SNeilBrown 10483dd98a3bSJeff Layton if (size > 0) { 10499dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10503dd98a3bSJeff Layton return -EBUSY; 10513dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10520964a3d3SNeilBrown return -EINVAL; 10530964a3d3SNeilBrown buf[size-1] = 0; 10540964a3d3SNeilBrown 10550964a3d3SNeilBrown recdir = mesg; 10560964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10570964a3d3SNeilBrown if (len <= 0) 10580964a3d3SNeilBrown return -EINVAL; 10590964a3d3SNeilBrown 10600964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 106169049961SAndi Kleen if (status) 106269049961SAndi Kleen return status; 10633dd98a3bSJeff Layton } 10643d72ab8fSChuck Lever 10653d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10663d72ab8fSChuck Lever nfs4_recoverydir()); 10670964a3d3SNeilBrown } 10683dd98a3bSJeff Layton 1069262a0982SChuck Lever /** 1070262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1071262a0982SChuck Lever * 1072262a0982SChuck Lever * Input: 1073262a0982SChuck Lever * buf: ignored 1074262a0982SChuck Lever * size: zero 1075262a0982SChuck Lever * 1076262a0982SChuck Lever * OR 1077262a0982SChuck Lever * 1078262a0982SChuck Lever * Input: 1079262a0982SChuck Lever * buf: C string containing the pathname 1080262a0982SChuck Lever * of the directory on a local file 1081262a0982SChuck Lever * system containing permanent NFSv4 1082262a0982SChuck Lever * recovery data 1083262a0982SChuck Lever * size: non-zero length of C string in @buf 1084262a0982SChuck Lever * Output: 1085262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1086262a0982SChuck Lever * containing the current recovery pathname setting; 1087262a0982SChuck Lever * return code is the size in bytes of the string 1088262a0982SChuck Lever * On error: return code is zero or a negative errno value 1089262a0982SChuck Lever */ 10903dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10913dd98a3bSJeff Layton { 10923dd98a3bSJeff Layton ssize_t rv; 1093244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10943dd98a3bSJeff Layton 10953dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10969dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10973dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10983dd98a3bSJeff Layton return rv; 10993dd98a3bSJeff Layton } 11003dd98a3bSJeff Layton 11017f5ef2e9SJeff Layton /** 11027f5ef2e9SJeff Layton * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 11037f5ef2e9SJeff Layton * 11047f5ef2e9SJeff Layton * Input: 11057f5ef2e9SJeff Layton * buf: ignored 11067f5ef2e9SJeff Layton * size: zero 11077f5ef2e9SJeff Layton * OR 11087f5ef2e9SJeff Layton * 11097f5ef2e9SJeff Layton * Input: 11107f5ef2e9SJeff Layton * buf: any value 11117f5ef2e9SJeff Layton * size: non-zero length of C string in @buf 11127f5ef2e9SJeff Layton * Output: 11137f5ef2e9SJeff Layton * passed-in buffer filled with "Y" or "N" with a newline 11147f5ef2e9SJeff Layton * and NULL-terminated C string. This indicates whether 11157f5ef2e9SJeff Layton * the grace period has ended in the current net 11167f5ef2e9SJeff Layton * namespace. Return code is the size in bytes of the 11177f5ef2e9SJeff Layton * string. Writing a string that starts with 'Y', 'y', or 11187f5ef2e9SJeff Layton * '1' to the file will end the grace period for nfsd's v4 11197f5ef2e9SJeff Layton * lock manager. 11207f5ef2e9SJeff Layton */ 11217f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 11227f5ef2e9SJeff Layton { 1123244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 11247f5ef2e9SJeff Layton 11257f5ef2e9SJeff Layton if (size > 0) { 11267f5ef2e9SJeff Layton switch(buf[0]) { 11277f5ef2e9SJeff Layton case 'Y': 11287f5ef2e9SJeff Layton case 'y': 11297f5ef2e9SJeff Layton case '1': 1130dd838821SYihao Wu if (!nn->nfsd_serv) 113162a063b8SJ. Bruce Fields return -EBUSY; 11327f5ef2e9SJeff Layton nfsd4_end_grace(nn); 11337f5ef2e9SJeff Layton break; 11347f5ef2e9SJeff Layton default: 11357f5ef2e9SJeff Layton return -EINVAL; 11367f5ef2e9SJeff Layton } 11377f5ef2e9SJeff Layton } 11387f5ef2e9SJeff Layton 11397f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 11407f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 11417f5ef2e9SJeff Layton } 11427f5ef2e9SJeff Layton 114370c3b76cSNeilBrown #endif 11440964a3d3SNeilBrown 11451da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11461da177e4SLinus Torvalds /* 11471da177e4SLinus Torvalds * populating the filesystem. 11481da177e4SLinus Torvalds */ 11491da177e4SLinus Torvalds 1150*96a374a3SDavid Howells static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) 11511da177e4SLinus Torvalds { 1152cda37124SEric Biggers static const struct tree_descr nfsd_files[] = { 115396d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 1154e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1155e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 11564373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 11574373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 115817efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 115917efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 11601da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 11611da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1162eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 116303cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 1164a2f999a3SJeff Layton [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, 116570c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 116680212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1167596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 11685b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 1169b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 1170b0b0c0a2SKevin Coffman [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, 1171b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 11721da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 11731da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1174efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 11750964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 11767f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 11771da177e4SLinus Torvalds #endif 11781da177e4SLinus Torvalds /* last one */ {""} 11791da177e4SLinus Torvalds }; 1180*96a374a3SDavid Howells 1181d91ee87dSEric W. Biederman return simple_fill_super(sb, 0x6e667364, nfsd_files); 11821da177e4SLinus Torvalds } 11831da177e4SLinus Torvalds 1184*96a374a3SDavid Howells static int nfsd_fs_get_tree(struct fs_context *fc) 11851da177e4SLinus Torvalds { 1186*96a374a3SDavid Howells fc->s_fs_info = get_net(fc->net_ns); 1187*96a374a3SDavid Howells return vfs_get_super(fc, vfs_get_keyed_super, nfsd_fill_super); 1188*96a374a3SDavid Howells } 1189*96a374a3SDavid Howells 1190*96a374a3SDavid Howells static void nfsd_fs_free_fc(struct fs_context *fc) 1191*96a374a3SDavid Howells { 1192*96a374a3SDavid Howells if (fc->s_fs_info) 1193*96a374a3SDavid Howells put_net(fc->s_fs_info); 1194*96a374a3SDavid Howells } 1195*96a374a3SDavid Howells 1196*96a374a3SDavid Howells static const struct fs_context_operations nfsd_fs_context_ops = { 1197*96a374a3SDavid Howells .free = nfsd_fs_free_fc, 1198*96a374a3SDavid Howells .get_tree = nfsd_fs_get_tree, 1199*96a374a3SDavid Howells }; 1200*96a374a3SDavid Howells 1201*96a374a3SDavid Howells static int nfsd_init_fs_context(struct fs_context *fc) 1202*96a374a3SDavid Howells { 1203*96a374a3SDavid Howells put_user_ns(fc->user_ns); 1204*96a374a3SDavid Howells fc->user_ns = get_user_ns(fc->net_ns->user_ns); 1205*96a374a3SDavid Howells fc->ops = &nfsd_fs_context_ops; 1206*96a374a3SDavid Howells return 0; 120711f77942SStanislav Kinsbursky } 120811f77942SStanislav Kinsbursky 120911f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 121011f77942SStanislav Kinsbursky { 121111f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 121211f77942SStanislav Kinsbursky 121311f77942SStanislav Kinsbursky kill_litter_super(sb); 121411f77942SStanislav Kinsbursky put_net(net); 12151da177e4SLinus Torvalds } 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 12181da177e4SLinus Torvalds .owner = THIS_MODULE, 12191da177e4SLinus Torvalds .name = "nfsd", 1220*96a374a3SDavid Howells .init_fs_context = nfsd_init_fs_context, 122111f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 12221da177e4SLinus Torvalds }; 12237f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 12241da177e4SLinus Torvalds 1225e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1226e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1227e331f606SJ. Bruce Fields { 1228e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1229e331f606SJ. Bruce Fields 1230e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1231e331f606SJ. Bruce Fields if (!entry) 1232e331f606SJ. Bruce Fields return -ENOMEM; 123396d851c4SStanislav Kinsbursky entry = proc_create("exports", 0, entry, 123496d851c4SStanislav Kinsbursky &exports_proc_operations); 1235ff7c4b36Sfanchaoting if (!entry) { 1236ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1237e331f606SJ. Bruce Fields return -ENOMEM; 1238ff7c4b36Sfanchaoting } 1239e331f606SJ. Bruce Fields return 0; 1240e331f606SJ. Bruce Fields } 1241e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1242e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1243e331f606SJ. Bruce Fields { 1244e331f606SJ. Bruce Fields return 0; 1245e331f606SJ. Bruce Fields } 1246e331f606SJ. Bruce Fields #endif 1247e331f606SJ. Bruce Fields 1248c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 12495717e012SStanislav Kinsbursky 12505717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 12515717e012SStanislav Kinsbursky { 12525717e012SStanislav Kinsbursky int retval; 12533d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 12545717e012SStanislav Kinsbursky 12555717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 12565717e012SStanislav Kinsbursky if (retval) 12575717e012SStanislav Kinsbursky goto out_export_error; 1258f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1259f69adb2fSStanislav Kinsbursky if (retval) 1260f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1261e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1262e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 12633bf6b57eSJ. Bruce Fields nn->nfsd4_lease = 90; /* default lease time */ 12643bf6b57eSJ. Bruce Fields nn->nfsd4_grace = 90; 126503f318caSJ. Bruce Fields nn->somebody_reclaimed = false; 1266362063a5SScott Mayhew nn->track_reclaim_completes = false; 1267ebd7c72cSJ. Bruce Fields nn->clverifier_counter = prandom_u32(); 1268ebd7c72cSJ. Bruce Fields nn->clientid_counter = prandom_u32(); 1269e0639dc5SOlga Kornievskaia nn->s2s_cp_cl_id = nn->clientid_counter++; 12702317dc55SVasily Averin 12712317dc55SVasily Averin atomic_set(&nn->ntf_refcnt, 0); 12722317dc55SVasily Averin init_waitqueue_head(&nn->ntf_wq); 12735717e012SStanislav Kinsbursky return 0; 12745717e012SStanislav Kinsbursky 1275f69adb2fSStanislav Kinsbursky out_idmap_error: 1276f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 12775717e012SStanislav Kinsbursky out_export_error: 12785717e012SStanislav Kinsbursky return retval; 12795717e012SStanislav Kinsbursky } 12805717e012SStanislav Kinsbursky 12815717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 12825717e012SStanislav Kinsbursky { 1283f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 12845717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1285e333f3bbSTrond Myklebust nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); 12865717e012SStanislav Kinsbursky } 12875717e012SStanislav Kinsbursky 12887ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 12895717e012SStanislav Kinsbursky .init = nfsd_init_net, 12905717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 12917ea34ac1SJeff Layton .id = &nfsd_net_id, 12927ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 12937ea34ac1SJeff Layton }; 12947ea34ac1SJeff Layton 12951da177e4SLinus Torvalds static int __init init_nfsd(void) 12961da177e4SLinus Torvalds { 12971da177e4SLinus Torvalds int retval; 12981da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 12991da177e4SLinus Torvalds 13007ea34ac1SJeff Layton retval = register_pernet_subsys(&nfsd_net_ops); 13017ea34ac1SJeff Layton if (retval < 0) 1302bb7ffbf2SGiuseppe Cantavenera return retval; 1303bb7ffbf2SGiuseppe Cantavenera retval = register_cld_notifier(); 1304e8ff2a84SJ. Bruce Fields if (retval) 13057ea34ac1SJeff Layton goto out_unregister_pernet; 1306bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1307bb7ffbf2SGiuseppe Cantavenera if (retval) 1308bb7ffbf2SGiuseppe Cantavenera goto out_unregister_notifier; 13099cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 131065178db4SBryan Schumaker if (retval) 131165178db4SBryan Schumaker goto out_free_slabs; 13129cf514ccSChristoph Hellwig retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ 13139cf514ccSChristoph Hellwig if (retval) 13149cf514ccSChristoph Hellwig goto out_exit_pnfs; 13151da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1316d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1317d5c3428bSJ. Bruce Fields if (retval) 1318d5c3428bSJ. Bruce Fields goto out_free_stat; 13191da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1320e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1321e331f606SJ. Bruce Fields if (retval) 1322f69adb2fSStanislav Kinsbursky goto out_free_lockd; 13231da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 132426808d3fSJ. Bruce Fields if (retval) 132526808d3fSJ. Bruce Fields goto out_free_all; 132626808d3fSJ. Bruce Fields return 0; 132726808d3fSJ. Bruce Fields out_free_all: 13281da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 13291da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1330dbf847ecSJ. Bruce Fields out_free_lockd: 13311da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1332e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1333d5c3428bSJ. Bruce Fields out_free_stat: 1334d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 133565178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 13369cf514ccSChristoph Hellwig out_exit_pnfs: 13379cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 133865178db4SBryan Schumaker out_free_slabs: 133946b25895SJ. Bruce Fields nfsd4_free_slabs(); 1340813fd320SJeff Layton out_unregister_notifier: 1341797a9d79SJeff Layton unregister_cld_notifier(); 1342bb7ffbf2SGiuseppe Cantavenera out_unregister_pernet: 1343bb7ffbf2SGiuseppe Cantavenera unregister_pernet_subsys(&nfsd_net_ops); 13441da177e4SLinus Torvalds return retval; 13451da177e4SLinus Torvalds } 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds static void __exit exit_nfsd(void) 13481da177e4SLinus Torvalds { 1349d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 13501da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 13511da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 13521da177e4SLinus Torvalds nfsd_stat_shutdown(); 13531da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1354e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 13559cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 135665178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 13571da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 1358797a9d79SJeff Layton unregister_cld_notifier(); 1359bb7ffbf2SGiuseppe Cantavenera unregister_pernet_subsys(&nfsd_net_ops); 13601da177e4SLinus Torvalds } 13611da177e4SLinus Torvalds 13621da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 13631da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 13641da177e4SLinus Torvalds module_init(init_nfsd) 13651da177e4SLinus Torvalds module_exit(exit_nfsd) 1366