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> 135976687aSJeff Layton #include <linux/sunrpc/addr.h> 14b0b0c0a2SKevin Coffman #include <linux/sunrpc/gss_api.h> 15b084f598SJ. Bruce Fields #include <linux/sunrpc/gss_krb5_enctypes.h> 16813fd320SJeff Layton #include <linux/sunrpc/rpc_pipe_fs.h> 17143cb494SPaul Gortmaker #include <linux/module.h> 181da177e4SLinus Torvalds 192ca72e17SJ. Bruce Fields #include "idmap.h" 209a74af21SBoaz Harrosh #include "nfsd.h" 219a74af21SBoaz Harrosh #include "cache.h" 22f3c7521fSBryan Schumaker #include "state.h" 237ea34ac1SJeff Layton #include "netns.h" 249cf514ccSChristoph Hellwig #include "pnfs.h" 259a74af21SBoaz Harrosh 261da177e4SLinus Torvalds /* 27b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 281da177e4SLinus Torvalds */ 291da177e4SLinus Torvalds enum { 301da177e4SLinus Torvalds NFSD_Root = 1, 311da177e4SLinus Torvalds NFSD_List, 32e8e8753fSJ. Bruce Fields NFSD_Export_features, 331da177e4SLinus Torvalds NFSD_Fh, 344373ea84SWendy Cheng NFSD_FO_UnlockIP, 3517efa372SWendy Cheng NFSD_FO_UnlockFS, 361da177e4SLinus Torvalds NFSD_Threads, 37eed2965aSGreg Banks NFSD_Pool_Threads, 3803cf6c9fSGreg Banks NFSD_Pool_Stats, 39a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 4070c3b76cSNeilBrown NFSD_Versions, 4180212d59SNeilBrown NFSD_Ports, 42596bbe53SNeilBrown NFSD_MaxBlkSize, 435b8db00bSJeff Layton NFSD_MaxConnections, 44b0b0c0a2SKevin Coffman NFSD_SupportedEnctypes, 4570c3b76cSNeilBrown /* 4670c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4770c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 4870c3b76cSNeilBrown */ 4970c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 501da177e4SLinus Torvalds NFSD_Leasetime, 51efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 520964a3d3SNeilBrown NFSD_RecoveryDir, 537f5ef2e9SJeff Layton NFSD_V4EndGrace, 5470c3b76cSNeilBrown #endif 551da177e4SLinus Torvalds }; 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* 581da177e4SLinus Torvalds * write() for these nodes. 591da177e4SLinus Torvalds */ 601da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 61b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 62b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 631da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 64eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 6570c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 6680212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 67596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 685b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 6970c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 701da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 71efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 720964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 737f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 7470c3b76cSNeilBrown #endif 751da177e4SLinus Torvalds 76c2cdc2abSEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 771da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 78b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 79b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 801da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 81eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 8270c3b76cSNeilBrown [NFSD_Versions] = write_versions, 8380212d59SNeilBrown [NFSD_Ports] = write_ports, 84596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 855b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 8670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 871da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 88efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 890964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 907f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 9170c3b76cSNeilBrown #endif 921da177e4SLinus Torvalds }; 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 951da177e4SLinus Torvalds { 96496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 971da177e4SLinus Torvalds char *data; 981da177e4SLinus Torvalds ssize_t rv; 991da177e4SLinus Torvalds 100e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1011da177e4SLinus Torvalds return -EINVAL; 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1041da177e4SLinus Torvalds if (IS_ERR(data)) 1051da177e4SLinus Torvalds return PTR_ERR(data); 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1088971a101SNeilBrown if (rv >= 0) { 1091da177e4SLinus Torvalds simple_transaction_set(file, rv); 1101da177e4SLinus Torvalds rv = size; 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds return rv; 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds 1157390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1167390022dSNeilBrown { 1177390022dSNeilBrown if (! file->private_data) { 1187390022dSNeilBrown /* An attempt to read a transaction file without writing 1197390022dSNeilBrown * causes a 0-byte write so that the file can return 1207390022dSNeilBrown * state information 1217390022dSNeilBrown */ 1227390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1237390022dSNeilBrown if (rv < 0) 1247390022dSNeilBrown return rv; 1257390022dSNeilBrown } 1267390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1277390022dSNeilBrown } 1287390022dSNeilBrown 1294b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1301da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1317390022dSNeilBrown .read = nfsctl_transaction_read, 1321da177e4SLinus Torvalds .release = simple_transaction_release, 1336038f373SArnd Bergmann .llseek = default_llseek, 1341da177e4SLinus Torvalds }; 1351da177e4SLinus Torvalds 13696d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1371da177e4SLinus Torvalds { 138f2c7ea10SStanislav Kinsbursky int err; 139f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 14096d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 141f2c7ea10SStanislav Kinsbursky 142f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 143f2c7ea10SStanislav Kinsbursky if (err) 144f2c7ea10SStanislav Kinsbursky return err; 145f2c7ea10SStanislav Kinsbursky 146f2c7ea10SStanislav Kinsbursky seq = file->private_data; 147e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 148f2c7ea10SStanislav Kinsbursky return 0; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 15196d851c4SStanislav Kinsbursky static int exports_proc_open(struct inode *inode, struct file *file) 15296d851c4SStanislav Kinsbursky { 15396d851c4SStanislav Kinsbursky return exports_net_open(current->nsproxy->net_ns, file); 15496d851c4SStanislav Kinsbursky } 15596d851c4SStanislav Kinsbursky 15696d851c4SStanislav Kinsbursky static const struct file_operations exports_proc_operations = { 15796d851c4SStanislav Kinsbursky .open = exports_proc_open, 15896d851c4SStanislav Kinsbursky .read = seq_read, 15996d851c4SStanislav Kinsbursky .llseek = seq_lseek, 16096d851c4SStanislav Kinsbursky .release = seq_release, 16196d851c4SStanislav Kinsbursky }; 16296d851c4SStanislav Kinsbursky 16396d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 16496d851c4SStanislav Kinsbursky { 16596d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 16696d851c4SStanislav Kinsbursky } 16796d851c4SStanislav Kinsbursky 16896d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 16996d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1701da177e4SLinus Torvalds .read = seq_read, 1711da177e4SLinus Torvalds .llseek = seq_lseek, 1721da177e4SLinus Torvalds .release = seq_release, 1731da177e4SLinus Torvalds }; 1741da177e4SLinus Torvalds 175e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 176e8e8753fSJ. Bruce Fields { 177e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 178e8e8753fSJ. Bruce Fields return 0; 179e8e8753fSJ. Bruce Fields } 180e8e8753fSJ. Bruce Fields 181e8e8753fSJ. Bruce Fields static int export_features_open(struct inode *inode, struct file *file) 182e8e8753fSJ. Bruce Fields { 183e8e8753fSJ. Bruce Fields return single_open(file, export_features_show, NULL); 184e8e8753fSJ. Bruce Fields } 185e8e8753fSJ. Bruce Fields 18675ef9de1SAl Viro static const struct file_operations export_features_operations = { 187e8e8753fSJ. Bruce Fields .open = export_features_open, 188e8e8753fSJ. Bruce Fields .read = seq_read, 189e8e8753fSJ. Bruce Fields .llseek = seq_lseek, 190e8e8753fSJ. Bruce Fields .release = single_release, 191e8e8753fSJ. Bruce Fields }; 192e8e8753fSJ. Bruce Fields 193b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 194b0b0c0a2SKevin Coffman static int supported_enctypes_show(struct seq_file *m, void *v) 195b0b0c0a2SKevin Coffman { 196b084f598SJ. Bruce Fields seq_printf(m, KRB5_SUPPORTED_ENCTYPES); 197b0b0c0a2SKevin Coffman return 0; 198b0b0c0a2SKevin Coffman } 199b0b0c0a2SKevin Coffman 200b0b0c0a2SKevin Coffman static int supported_enctypes_open(struct inode *inode, struct file *file) 201b0b0c0a2SKevin Coffman { 202b0b0c0a2SKevin Coffman return single_open(file, supported_enctypes_show, NULL); 203b0b0c0a2SKevin Coffman } 204b0b0c0a2SKevin Coffman 20575ef9de1SAl Viro static const struct file_operations supported_enctypes_ops = { 206b0b0c0a2SKevin Coffman .open = supported_enctypes_open, 207b0b0c0a2SKevin Coffman .read = seq_read, 208b0b0c0a2SKevin Coffman .llseek = seq_lseek, 209b0b0c0a2SKevin Coffman .release = single_release, 210b0b0c0a2SKevin Coffman }; 211b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 212b0b0c0a2SKevin Coffman 213828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 21403cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 21503cf6c9fSGreg Banks .read = seq_read, 21603cf6c9fSGreg Banks .llseek = seq_lseek, 217ed2d8aedSRyusei Yamaguchi .release = nfsd_pool_stats_release, 21803cf6c9fSGreg Banks }; 21903cf6c9fSGreg Banks 2207ba630f5SJulia Lawall static const struct file_operations reply_cache_stats_operations = { 221a2f999a3SJeff Layton .open = nfsd_reply_cache_stats_open, 222a2f999a3SJeff Layton .read = seq_read, 223a2f999a3SJeff Layton .llseek = seq_lseek, 224a2f999a3SJeff Layton .release = single_release, 225a2f999a3SJeff Layton }; 226a2f999a3SJeff Layton 2271da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 2281da177e4SLinus Torvalds /* 2291da177e4SLinus Torvalds * payload - write methods 2301da177e4SLinus Torvalds */ 2311da177e4SLinus Torvalds 232244c7d44SAl Viro static inline struct net *netns(struct file *file) 233244c7d44SAl Viro { 234244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 235244c7d44SAl Viro } 2361da177e4SLinus Torvalds 237262a0982SChuck Lever /** 238262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 239262a0982SChuck Lever * 240262a0982SChuck Lever * Experimental. 241262a0982SChuck Lever * 242262a0982SChuck Lever * Input: 243262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2444116092bSChuck Lever * presentation format IP address 245262a0982SChuck Lever * size: length of C string in @buf 246262a0982SChuck Lever * Output: 247262a0982SChuck Lever * On success: returns zero if all specified locks were released; 248262a0982SChuck Lever * returns one if one or more locks were not released 249262a0982SChuck Lever * On error: return code is negative errno value 250262a0982SChuck Lever */ 251b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2524373ea84SWendy Cheng { 2534116092bSChuck Lever struct sockaddr_storage address; 2544116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2554116092bSChuck Lever size_t salen = sizeof(address); 256367c8c7bSChuck Lever char *fo_path; 257244c7d44SAl Viro struct net *net = netns(file); 2584373ea84SWendy Cheng 2594373ea84SWendy Cheng /* sanity check */ 2604373ea84SWendy Cheng if (size == 0) 2614373ea84SWendy Cheng return -EINVAL; 2624373ea84SWendy Cheng 2634373ea84SWendy Cheng if (buf[size-1] != '\n') 2644373ea84SWendy Cheng return -EINVAL; 2654373ea84SWendy Cheng 2664373ea84SWendy Cheng fo_path = buf; 2674373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2684373ea84SWendy Cheng return -EINVAL; 2694373ea84SWendy Cheng 27011f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2714373ea84SWendy Cheng return -EINVAL; 2724373ea84SWendy Cheng 2734116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2744373ea84SWendy Cheng } 2754373ea84SWendy Cheng 276262a0982SChuck Lever /** 277262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 278262a0982SChuck Lever * 279262a0982SChuck Lever * Experimental. 280262a0982SChuck Lever * 281262a0982SChuck Lever * Input: 282262a0982SChuck Lever * buf: '\n'-terminated C string containing the 283262a0982SChuck Lever * absolute pathname of a local file system 284262a0982SChuck Lever * size: length of C string in @buf 285262a0982SChuck Lever * Output: 286262a0982SChuck Lever * On success: returns zero if all specified locks were released; 287262a0982SChuck Lever * returns one if one or more locks were not released 288262a0982SChuck Lever * On error: return code is negative errno value 289262a0982SChuck Lever */ 290b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 29117efa372SWendy Cheng { 292a63bb996SAl Viro struct path path; 29317efa372SWendy Cheng char *fo_path; 29417efa372SWendy Cheng int error; 29517efa372SWendy Cheng 29617efa372SWendy Cheng /* sanity check */ 29717efa372SWendy Cheng if (size == 0) 29817efa372SWendy Cheng return -EINVAL; 29917efa372SWendy Cheng 30017efa372SWendy Cheng if (buf[size-1] != '\n') 30117efa372SWendy Cheng return -EINVAL; 30217efa372SWendy Cheng 30317efa372SWendy Cheng fo_path = buf; 30417efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 30517efa372SWendy Cheng return -EINVAL; 30617efa372SWendy Cheng 307a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 30817efa372SWendy Cheng if (error) 30917efa372SWendy Cheng return error; 31017efa372SWendy Cheng 311262a0982SChuck Lever /* 312262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 313262a0982SChuck Lever * releasing locks on the wrong file system. 314262a0982SChuck Lever * 315262a0982SChuck Lever * For example: 316262a0982SChuck Lever * 1. Does the path refer to a directory? 317262a0982SChuck Lever * 2. Is that directory a mount point, or 318262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 319262a0982SChuck Lever */ 320d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 32117efa372SWendy Cheng 322a63bb996SAl Viro path_put(&path); 32317efa372SWendy Cheng return error; 32417efa372SWendy Cheng } 32517efa372SWendy Cheng 326262a0982SChuck Lever /** 327262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 328262a0982SChuck Lever * 329262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 330262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 331262a0982SChuck Lever * contain escape sequences. 332262a0982SChuck Lever * 333262a0982SChuck Lever * Input: 334262a0982SChuck Lever * buf: 335262a0982SChuck Lever * domain: client domain name 336262a0982SChuck Lever * path: export pathname 337262a0982SChuck Lever * maxsize: numeric maximum size of 338262a0982SChuck Lever * @buf 339262a0982SChuck Lever * size: length of C string in @buf 340262a0982SChuck Lever * Output: 341262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 342262a0982SChuck Lever * string containing a ASCII hex text version 343262a0982SChuck Lever * of the NFS file handle; 344262a0982SChuck Lever * return code is the size in bytes of the string 345262a0982SChuck Lever * On error: return code is negative errno value 346262a0982SChuck Lever */ 3471da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3481da177e4SLinus Torvalds { 3491da177e4SLinus Torvalds char *dname, *path; 350246d95baSAndrew Morton int uninitialized_var(maxsize); 3511da177e4SLinus Torvalds char *mesg = buf; 3521da177e4SLinus Torvalds int len; 3531da177e4SLinus Torvalds struct auth_domain *dom; 3541da177e4SLinus Torvalds struct knfsd_fh fh; 3551da177e4SLinus Torvalds 35687d26ea7SJ. Bruce Fields if (size == 0) 35787d26ea7SJ. Bruce Fields return -EINVAL; 35887d26ea7SJ. Bruce Fields 3591da177e4SLinus Torvalds if (buf[size-1] != '\n') 3601da177e4SLinus Torvalds return -EINVAL; 3611da177e4SLinus Torvalds buf[size-1] = 0; 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds dname = mesg; 3641da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 36554224f04SChuck Lever if (len <= 0) 36654224f04SChuck Lever return -EINVAL; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds path = dname+len+1; 3691da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 37054224f04SChuck Lever if (len <= 0) 37154224f04SChuck Lever return -EINVAL; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3741da177e4SLinus Torvalds if (len) 3751da177e4SLinus Torvalds return len; 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3781da177e4SLinus Torvalds return -EINVAL; 3793c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3821da177e4SLinus Torvalds return -EINVAL; 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3851da177e4SLinus Torvalds dom = unix_domain_find(dname); 3861da177e4SLinus Torvalds if (!dom) 3871da177e4SLinus Torvalds return -ENOMEM; 3881da177e4SLinus Torvalds 389244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3901da177e4SLinus Torvalds auth_domain_put(dom); 3911da177e4SLinus Torvalds if (len) 3921da177e4SLinus Torvalds return len; 3931da177e4SLinus Torvalds 39454224f04SChuck Lever mesg = buf; 39554224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 3961da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 3971da177e4SLinus Torvalds mesg[-1] = '\n'; 3981da177e4SLinus Torvalds return mesg - buf; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 401262a0982SChuck Lever /** 402262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 403262a0982SChuck Lever * 404262a0982SChuck Lever * Input: 405262a0982SChuck Lever * buf: ignored 406262a0982SChuck Lever * size: zero 407262a0982SChuck Lever * Output: 408262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 409262a0982SChuck Lever * string numeric value representing the number of 410262a0982SChuck Lever * running NFSD threads; 411262a0982SChuck Lever * return code is the size in bytes of the string 412262a0982SChuck Lever * On error: return code is zero 413262a0982SChuck Lever * 414262a0982SChuck Lever * OR 415262a0982SChuck Lever * 416262a0982SChuck Lever * Input: 417262a0982SChuck Lever * buf: C string containing an unsigned 418262a0982SChuck Lever * integer value representing the 419262a0982SChuck Lever * number of NFSD threads to start 420262a0982SChuck Lever * size: non-zero length of C string in @buf 421262a0982SChuck Lever * Output: 422262a0982SChuck Lever * On success: NFS service is started; 423262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 424262a0982SChuck Lever * string numeric value representing the number of 425262a0982SChuck Lever * running NFSD threads; 426262a0982SChuck Lever * return code is the size in bytes of the string 427262a0982SChuck Lever * On error: return code is zero or a negative errno value 428262a0982SChuck Lever */ 4291da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 4301da177e4SLinus Torvalds { 4311da177e4SLinus Torvalds char *mesg = buf; 4321da177e4SLinus Torvalds int rv; 433244c7d44SAl Viro struct net *net = netns(file); 434d41a9417SStanislav Kinsbursky 4351da177e4SLinus Torvalds if (size > 0) { 4361da177e4SLinus Torvalds int newthreads; 4371da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4381da177e4SLinus Torvalds if (rv) 4391da177e4SLinus Torvalds return rv; 4401da177e4SLinus Torvalds if (newthreads < 0) 4411da177e4SLinus Torvalds return -EINVAL; 442d41a9417SStanislav Kinsbursky rv = nfsd_svc(newthreads, net); 44382e12fe9SNeilBrown if (rv < 0) 4441da177e4SLinus Torvalds return rv; 44582e12fe9SNeilBrown } else 4469dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 447e06b6405SChuck Lever 44882e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds 451262a0982SChuck Lever /** 452262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 453262a0982SChuck Lever * 454262a0982SChuck Lever * Input: 455262a0982SChuck Lever * buf: ignored 456262a0982SChuck Lever * size: zero 457262a0982SChuck Lever * 458262a0982SChuck Lever * OR 459262a0982SChuck Lever * 460262a0982SChuck Lever * Input: 461262a0982SChuck Lever * buf: C string containing whitespace- 462262a0982SChuck Lever * separated unsigned integer values 463262a0982SChuck Lever * representing the number of NFSD 464262a0982SChuck Lever * threads to start in each pool 465262a0982SChuck Lever * size: non-zero length of C string in @buf 466262a0982SChuck Lever * Output: 467262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 468262a0982SChuck Lever * string containing integer values representing the 469262a0982SChuck Lever * number of NFSD threads in each pool; 470262a0982SChuck Lever * return code is the size in bytes of the string 471262a0982SChuck Lever * On error: return code is zero or a negative errno value 472262a0982SChuck Lever */ 473eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 474eed2965aSGreg Banks { 475eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 476eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 477eed2965aSGreg Banks */ 478eed2965aSGreg Banks char *mesg = buf; 479eed2965aSGreg Banks int i; 480eed2965aSGreg Banks int rv; 481eed2965aSGreg Banks int len; 482bedbdd8bSNeil Brown int npools; 483eed2965aSGreg Banks int *nthreads; 484244c7d44SAl Viro struct net *net = netns(file); 485eed2965aSGreg Banks 486bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4879dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 488eed2965aSGreg Banks if (npools == 0) { 489eed2965aSGreg Banks /* 490eed2965aSGreg Banks * NFS is shut down. The admin can start it by 491eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 492eed2965aSGreg Banks * file, sorry. Report zero threads. 493eed2965aSGreg Banks */ 494bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 495eed2965aSGreg Banks strcpy(buf, "0\n"); 496eed2965aSGreg Banks return strlen(buf); 497eed2965aSGreg Banks } 498eed2965aSGreg Banks 499eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 500bedbdd8bSNeil Brown rv = -ENOMEM; 501eed2965aSGreg Banks if (nthreads == NULL) 502bedbdd8bSNeil Brown goto out_free; 503eed2965aSGreg Banks 504eed2965aSGreg Banks if (size > 0) { 505eed2965aSGreg Banks for (i = 0; i < npools; i++) { 506eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 507eed2965aSGreg Banks if (rv == -ENOENT) 508eed2965aSGreg Banks break; /* fewer numbers than pools */ 509eed2965aSGreg Banks if (rv) 510eed2965aSGreg Banks goto out_free; /* syntax error */ 511eed2965aSGreg Banks rv = -EINVAL; 512eed2965aSGreg Banks if (nthreads[i] < 0) 513eed2965aSGreg Banks goto out_free; 514eed2965aSGreg Banks } 5153938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 516eed2965aSGreg Banks if (rv) 517eed2965aSGreg Banks goto out_free; 518eed2965aSGreg Banks } 519eed2965aSGreg Banks 5209dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 521eed2965aSGreg Banks if (rv) 522eed2965aSGreg Banks goto out_free; 523eed2965aSGreg Banks 524eed2965aSGreg Banks mesg = buf; 525eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 526eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 527eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 528eed2965aSGreg Banks len = strlen(mesg); 529eed2965aSGreg Banks size -= len; 530eed2965aSGreg Banks mesg += len; 531eed2965aSGreg Banks } 532413d63d7SJ. Bruce Fields rv = mesg - buf; 533eed2965aSGreg Banks out_free: 534eed2965aSGreg Banks kfree(nthreads); 535bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 536eed2965aSGreg Banks return rv; 537eed2965aSGreg Banks } 538eed2965aSGreg Banks 539ff7d1179STrond Myklebust static ssize_t 540*e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 541*e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 542ff7d1179STrond Myklebust { 543abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 544*e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 545ff7d1179STrond Myklebust 546abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 547*e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 548ff7d1179STrond Myklebust supported = false; 549abcb4dacSNeilBrown if (minor == 0 && supported) 550abcb4dacSNeilBrown /* 551abcb4dacSNeilBrown * special case for backward compatability. 552abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 553abcb4dacSNeilBrown * +4, unless -4.0 is present. 554abcb4dacSNeilBrown */ 555abcb4dacSNeilBrown return 0; 556ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 557ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 558ff7d1179STrond Myklebust } 559ff7d1179STrond Myklebust 5603dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 56170c3b76cSNeilBrown { 56270c3b76cSNeilBrown char *mesg = buf; 5638daf220aSBenny Halevy char *vers, *minorp, sign; 564261758b5SChuck Lever int len, num, remaining; 56570c3b76cSNeilBrown ssize_t tlen = 0; 56670c3b76cSNeilBrown char *sep; 567244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 56870c3b76cSNeilBrown 56970c3b76cSNeilBrown if (size>0) { 5709dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5716658d3a7SNeilBrown /* Cannot change versions without updating 5729dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5736658d3a7SNeilBrown * rq_argp and rq_resp 5746658d3a7SNeilBrown */ 57570c3b76cSNeilBrown return -EBUSY; 57670c3b76cSNeilBrown if (buf[size-1] != '\n') 57770c3b76cSNeilBrown return -EINVAL; 57870c3b76cSNeilBrown buf[size-1] = 0; 57970c3b76cSNeilBrown 58070c3b76cSNeilBrown vers = mesg; 58170c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 58270c3b76cSNeilBrown if (len <= 0) return -EINVAL; 58370c3b76cSNeilBrown do { 584d3635ff0STrond Myklebust enum vers_op cmd; 585abcb4dacSNeilBrown unsigned minor; 58670c3b76cSNeilBrown sign = *vers; 58770c3b76cSNeilBrown if (sign == '+' || sign == '-') 5888daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 58970c3b76cSNeilBrown else 5908daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5918daf220aSBenny Halevy if (*minorp == '.') { 592ff89be87SJ. Bruce Fields if (num != 4) 5938daf220aSBenny Halevy return -EINVAL; 594e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5958daf220aSBenny Halevy return -EINVAL; 596abcb4dacSNeilBrown } 597abcb4dacSNeilBrown 598d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 59970c3b76cSNeilBrown switch(num) { 60070c3b76cSNeilBrown case 2: 60170c3b76cSNeilBrown case 3: 602*e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 603d3635ff0STrond Myklebust break; 60470c3b76cSNeilBrown case 4: 605abcb4dacSNeilBrown if (*minorp == '.') { 606*e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 607abcb4dacSNeilBrown return -EINVAL; 608*e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 609abcb4dacSNeilBrown /* 610abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 611abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 612abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 613abcb4dacSNeilBrown */ 614abcb4dacSNeilBrown minor = 0; 615*e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 616abcb4dacSNeilBrown minor++; 617abcb4dacSNeilBrown } 61870c3b76cSNeilBrown break; 61970c3b76cSNeilBrown default: 62070c3b76cSNeilBrown return -EINVAL; 62170c3b76cSNeilBrown } 62270c3b76cSNeilBrown vers += len + 1; 62370c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 62470c3b76cSNeilBrown /* If all get turned off, turn them back on, as 62570c3b76cSNeilBrown * having no versions is BAD 62670c3b76cSNeilBrown */ 627*e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 62870c3b76cSNeilBrown } 629261758b5SChuck Lever 63070c3b76cSNeilBrown /* Now write current state into reply buffer */ 63170c3b76cSNeilBrown len = 0; 63270c3b76cSNeilBrown sep = ""; 633261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 634ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 635abcb4dacSNeilBrown int minor; 636*e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 637e35659f1SNeilBrown continue; 638abcb4dacSNeilBrown 639abcb4dacSNeilBrown minor = -1; 640ff7d1179STrond Myklebust do { 641*e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 642ff7d1179STrond Myklebust sep, num, minor); 643818f2f57SDan Carpenter if (len >= remaining) 644ff7d1179STrond Myklebust goto out; 645261758b5SChuck Lever remaining -= len; 646261758b5SChuck Lever buf += len; 647261758b5SChuck Lever tlen += len; 648ff7d1179STrond Myklebust minor++; 649abcb4dacSNeilBrown if (len) 650ff7d1179STrond Myklebust sep = " "; 651ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 652261758b5SChuck Lever } 653ff7d1179STrond Myklebust out: 654261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 655818f2f57SDan Carpenter if (len >= remaining) 656261758b5SChuck Lever return -EINVAL; 657261758b5SChuck Lever return tlen + len; 65870c3b76cSNeilBrown } 65970c3b76cSNeilBrown 660262a0982SChuck Lever /** 661262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 662262a0982SChuck Lever * 663262a0982SChuck Lever * Input: 664262a0982SChuck Lever * buf: ignored 665262a0982SChuck Lever * size: zero 666262a0982SChuck Lever * Output: 667262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 668262a0982SChuck Lever * string containing positive or negative integer 669262a0982SChuck Lever * values representing the current status of each 670262a0982SChuck Lever * protocol version; 671262a0982SChuck Lever * return code is the size in bytes of the string 672262a0982SChuck Lever * On error: return code is zero or a negative errno value 673262a0982SChuck Lever * 674262a0982SChuck Lever * OR 675262a0982SChuck Lever * 676262a0982SChuck Lever * Input: 677262a0982SChuck Lever * buf: C string containing whitespace- 678262a0982SChuck Lever * separated positive or negative 679262a0982SChuck Lever * integer values representing NFS 680262a0982SChuck Lever * protocol versions to enable ("+n") 681262a0982SChuck Lever * or disable ("-n") 682262a0982SChuck Lever * size: non-zero length of C string in @buf 683262a0982SChuck Lever * Output: 684262a0982SChuck Lever * On success: status of zero or more protocol versions has 685262a0982SChuck Lever * been updated; passed-in buffer filled with 686262a0982SChuck Lever * '\n'-terminated C string containing positive 687262a0982SChuck Lever * or negative integer values representing the 688262a0982SChuck Lever * current status of each protocol version; 689262a0982SChuck Lever * return code is the size in bytes of the string 690262a0982SChuck Lever * On error: return code is zero or a negative errno value 691262a0982SChuck Lever */ 6923dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6933dd98a3bSJeff Layton { 6943dd98a3bSJeff Layton ssize_t rv; 6953dd98a3bSJeff Layton 6963dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6973dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6983dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6993dd98a3bSJeff Layton return rv; 7003dd98a3bSJeff Layton } 7013dd98a3bSJeff Layton 7024cd5dc75SChuck Lever /* 7030a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 7040a5372d8SChuck Lever * transports. 7050a5372d8SChuck Lever */ 7069dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 7070a5372d8SChuck Lever { 7089dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7099dd9845fSStanislav Kinsbursky 7109dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 7110a5372d8SChuck Lever return 0; 7129dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 7130a5372d8SChuck Lever } 7140a5372d8SChuck Lever 7150a5372d8SChuck Lever /* 7160b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 7170b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 7180b7c2f6fSChuck Lever * nfsd listener. 7190b7c2f6fSChuck Lever */ 72008160352SStanislav Kinsbursky static ssize_t __write_ports_addfd(char *buf, struct net *net) 7210b7c2f6fSChuck Lever { 7220b7c2f6fSChuck Lever char *mesg = buf; 7230b7c2f6fSChuck Lever int fd, err; 7249dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7250b7c2f6fSChuck Lever 7260b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 7270b7c2f6fSChuck Lever if (err != 0 || fd < 0) 7280b7c2f6fSChuck Lever return -EINVAL; 7290b7c2f6fSChuck Lever 73030646394SStanislav Kinsbursky if (svc_alien_sock(net, fd)) { 73130646394SStanislav Kinsbursky printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); 73230646394SStanislav Kinsbursky return -EINVAL; 73330646394SStanislav Kinsbursky } 73430646394SStanislav Kinsbursky 7356777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7360b7c2f6fSChuck Lever if (err != 0) 7370b7c2f6fSChuck Lever return err; 7380b7c2f6fSChuck Lever 7399dd9845fSStanislav Kinsbursky err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 74078a8d7c8SJeff Layton if (err < 0) { 74119f7e2caSStanislav Kinsbursky nfsd_destroy(net); 74278a8d7c8SJeff Layton return err; 74378a8d7c8SJeff Layton } 744ea068badSChuck Lever 7450b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 7469dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 747ea068badSChuck Lever return err; 7480b7c2f6fSChuck Lever } 7490b7c2f6fSChuck Lever 7500b7c2f6fSChuck Lever /* 7514eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 7524eb68c26SChuck Lever * a port number. 7534eb68c26SChuck Lever */ 75408160352SStanislav Kinsbursky static ssize_t __write_ports_addxprt(char *buf, struct net *net) 7554eb68c26SChuck Lever { 7564eb68c26SChuck Lever char transport[16]; 75737498292SChuck Lever struct svc_xprt *xprt; 7584eb68c26SChuck Lever int port, err; 7599dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7604eb68c26SChuck Lever 761a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7624eb68c26SChuck Lever return -EINVAL; 7634eb68c26SChuck Lever 7644be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7654eb68c26SChuck Lever return -EINVAL; 7664eb68c26SChuck Lever 7676777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7684eb68c26SChuck Lever if (err != 0) 7694eb68c26SChuck Lever return err; 7704eb68c26SChuck Lever 7719dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 7724eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 77368717908SChuck Lever if (err < 0) 77437498292SChuck Lever goto out_err; 77537498292SChuck Lever 7769dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 77737498292SChuck Lever PF_INET6, port, SVC_SOCK_ANONYMOUS); 77837498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 77937498292SChuck Lever goto out_close; 7800cd14a06SJeff Layton 7810cd14a06SJeff Layton /* Decrease the count, but don't shut down the service */ 7829dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 7834eb68c26SChuck Lever return 0; 78437498292SChuck Lever out_close: 7859dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 78637498292SChuck Lever if (xprt != NULL) { 78737498292SChuck Lever svc_close_xprt(xprt); 78837498292SChuck Lever svc_xprt_put(xprt); 78937498292SChuck Lever } 79037498292SChuck Lever out_err: 79119f7e2caSStanislav Kinsbursky nfsd_destroy(net); 79237498292SChuck Lever return err; 7934eb68c26SChuck Lever } 7944eb68c26SChuck Lever 79508160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 79608160352SStanislav Kinsbursky struct net *net) 79780212d59SNeilBrown { 7980a5372d8SChuck Lever if (size == 0) 7999dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 8000b7c2f6fSChuck Lever 8010b7c2f6fSChuck Lever if (isdigit(buf[0])) 80208160352SStanislav Kinsbursky return __write_ports_addfd(buf, net); 80382d56591SChuck Lever 8044eb68c26SChuck Lever if (isalpha(buf[0])) 80508160352SStanislav Kinsbursky return __write_ports_addxprt(buf, net); 8064cd5dc75SChuck Lever 807b41b66d6SNeilBrown return -EINVAL; 808b41b66d6SNeilBrown } 80980212d59SNeilBrown 810262a0982SChuck Lever /** 811262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 812262a0982SChuck Lever * 813262a0982SChuck Lever * Input: 814262a0982SChuck Lever * buf: ignored 815262a0982SChuck Lever * size: zero 816262a0982SChuck Lever * Output: 817262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 818262a0982SChuck Lever * string containing a whitespace-separated list of 819262a0982SChuck Lever * named NFSD listeners; 820262a0982SChuck Lever * return code is the size in bytes of the string 821262a0982SChuck Lever * On error: return code is zero or a negative errno value 822262a0982SChuck Lever * 823262a0982SChuck Lever * OR 824262a0982SChuck Lever * 825262a0982SChuck Lever * Input: 826262a0982SChuck Lever * buf: C string containing an unsigned 827262a0982SChuck Lever * integer value representing a bound 828262a0982SChuck Lever * but unconnected socket that is to be 829c71206a7SChuck Lever * used as an NFSD listener; listen(3) 830c71206a7SChuck Lever * must be called for a SOCK_STREAM 831c71206a7SChuck Lever * socket, otherwise it is ignored 832262a0982SChuck Lever * size: non-zero length of C string in @buf 833262a0982SChuck Lever * Output: 834262a0982SChuck Lever * On success: NFS service is started; 835262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 836262a0982SChuck Lever * string containing a unique alphanumeric name of 837262a0982SChuck Lever * the listener; 838262a0982SChuck Lever * return code is the size in bytes of the string 839262a0982SChuck Lever * On error: return code is a negative errno value 840262a0982SChuck Lever * 841262a0982SChuck Lever * OR 842262a0982SChuck Lever * 843262a0982SChuck Lever * Input: 844262a0982SChuck Lever * buf: C string containing a transport 845262a0982SChuck Lever * name and an unsigned integer value 846262a0982SChuck Lever * representing the port to listen on, 847262a0982SChuck Lever * separated by whitespace 848262a0982SChuck Lever * size: non-zero length of C string in @buf 849262a0982SChuck Lever * Output: 850262a0982SChuck Lever * On success: returns zero; NFS service is started 851262a0982SChuck Lever * On error: return code is a negative errno value 852262a0982SChuck Lever */ 853bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 854bedbdd8bSNeil Brown { 855bedbdd8bSNeil Brown ssize_t rv; 8563dd98a3bSJeff Layton 857bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 858244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 859bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 860bedbdd8bSNeil Brown return rv; 861bedbdd8bSNeil Brown } 862bedbdd8bSNeil Brown 863bedbdd8bSNeil Brown 864596bbe53SNeilBrown int nfsd_max_blksize; 865596bbe53SNeilBrown 866262a0982SChuck Lever /** 867262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 868262a0982SChuck Lever * 869262a0982SChuck Lever * Input: 870262a0982SChuck Lever * buf: ignored 871262a0982SChuck Lever * size: zero 872262a0982SChuck Lever * 873262a0982SChuck Lever * OR 874262a0982SChuck Lever * 875262a0982SChuck Lever * Input: 876262a0982SChuck Lever * buf: C string containing an unsigned 877262a0982SChuck Lever * integer value representing the new 878262a0982SChuck Lever * NFS blksize 879262a0982SChuck Lever * size: non-zero length of C string in @buf 880262a0982SChuck Lever * Output: 881262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 882262a0982SChuck Lever * containing numeric value of the current NFS blksize 883262a0982SChuck Lever * setting; 884262a0982SChuck Lever * return code is the size in bytes of the string 885262a0982SChuck Lever * On error: return code is zero or a negative errno value 886262a0982SChuck Lever */ 887596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 888596bbe53SNeilBrown { 889596bbe53SNeilBrown char *mesg = buf; 890244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8919dd9845fSStanislav Kinsbursky 892596bbe53SNeilBrown if (size > 0) { 893596bbe53SNeilBrown int bsize; 894596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 895596bbe53SNeilBrown if (rv) 896596bbe53SNeilBrown return rv; 897596bbe53SNeilBrown /* force bsize into allowed range and 898596bbe53SNeilBrown * required alignment. 899596bbe53SNeilBrown */ 9003c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 9013c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 902596bbe53SNeilBrown bsize &= ~(1024-1); 903bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 9049dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 905bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 906596bbe53SNeilBrown return -EBUSY; 907596bbe53SNeilBrown } 908596bbe53SNeilBrown nfsd_max_blksize = bsize; 909bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 910596bbe53SNeilBrown } 911e06b6405SChuck Lever 912e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 913e06b6405SChuck Lever nfsd_max_blksize); 914596bbe53SNeilBrown } 915596bbe53SNeilBrown 9165b8db00bSJeff Layton /** 9175b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 9185b8db00bSJeff Layton * 9195b8db00bSJeff Layton * Input: 9205b8db00bSJeff Layton * buf: ignored 9215b8db00bSJeff Layton * size: zero 9225b8db00bSJeff Layton * OR 9235b8db00bSJeff Layton * 9245b8db00bSJeff Layton * Input: 9255b8db00bSJeff Layton * buf: C string containing an unsigned 9265b8db00bSJeff Layton * integer value representing the new 9275b8db00bSJeff Layton * number of max connections 9285b8db00bSJeff Layton * size: non-zero length of C string in @buf 9295b8db00bSJeff Layton * Output: 9305b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9315b8db00bSJeff Layton * containing numeric value of max_connections setting 9325b8db00bSJeff Layton * for this net namespace; 9335b8db00bSJeff Layton * return code is the size in bytes of the string 9345b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9355b8db00bSJeff Layton */ 9365b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9375b8db00bSJeff Layton { 9385b8db00bSJeff Layton char *mesg = buf; 939244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9405b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9415b8db00bSJeff Layton 9425b8db00bSJeff Layton if (size > 0) { 9435b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9445b8db00bSJeff Layton 9455b8db00bSJeff Layton if (rv) 9465b8db00bSJeff Layton return rv; 9475b8db00bSJeff Layton nn->max_connections = maxconn; 9485b8db00bSJeff Layton } 9495b8db00bSJeff Layton 9505b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9515b8db00bSJeff Layton } 9525b8db00bSJeff Layton 95370c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9549dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 9559dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 9561da177e4SLinus Torvalds { 9571da177e4SLinus Torvalds char *mesg = buf; 958f0135740SJ. Bruce Fields int rv, i; 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds if (size > 0) { 9619dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9623dd98a3bSJeff Layton return -EBUSY; 963f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9641da177e4SLinus Torvalds if (rv) 9651da177e4SLinus Torvalds return rv; 966e7b184f1SJ. Bruce Fields /* 967e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 968e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 969e7b184f1SJ. Bruce Fields * extremes are: 970e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 971e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 972e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 973e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 974e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 975e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 976e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 977e7b184f1SJ. Bruce Fields */ 978f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9791da177e4SLinus Torvalds return -EINVAL; 980f0135740SJ. Bruce Fields *time = i; 9811da177e4SLinus Torvalds } 982e06b6405SChuck Lever 983f0135740SJ. Bruce Fields return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 984f0135740SJ. Bruce Fields } 985f0135740SJ. Bruce Fields 9869dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 9879dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 988f0135740SJ. Bruce Fields { 989f0135740SJ. Bruce Fields ssize_t rv; 990f0135740SJ. Bruce Fields 991f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9929dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 993f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 994f0135740SJ. Bruce Fields return rv; 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 997262a0982SChuck Lever /** 998262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 999262a0982SChuck Lever * 1000262a0982SChuck Lever * Input: 1001262a0982SChuck Lever * buf: ignored 1002262a0982SChuck Lever * size: zero 1003262a0982SChuck Lever * 1004262a0982SChuck Lever * OR 1005262a0982SChuck Lever * 1006262a0982SChuck Lever * Input: 1007262a0982SChuck Lever * buf: C string containing an unsigned 1008262a0982SChuck Lever * integer value representing the new 1009262a0982SChuck Lever * NFSv4 lease expiry time 1010262a0982SChuck Lever * size: non-zero length of C string in @buf 1011262a0982SChuck Lever * Output: 1012262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 1013262a0982SChuck Lever * string containing unsigned integer value of the 1014262a0982SChuck Lever * current lease expiry time; 1015262a0982SChuck Lever * return code is the size in bytes of the string 1016262a0982SChuck Lever * On error: return code is zero or a negative errno value 1017262a0982SChuck Lever */ 10183dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 10193dd98a3bSJeff Layton { 1020244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10219dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 10223dd98a3bSJeff Layton } 10233dd98a3bSJeff Layton 1024efc4bb4fSJ. Bruce Fields /** 1025efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1026efc4bb4fSJ. Bruce Fields * 1027efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1028efc4bb4fSJ. Bruce Fields * 1029efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1030efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1031efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1032efc4bb4fSJ. Bruce Fields * anyway.) 1033efc4bb4fSJ. Bruce Fields */ 1034efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1035efc4bb4fSJ. Bruce Fields { 1036244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10379dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1038efc4bb4fSJ. Bruce Fields } 1039efc4bb4fSJ. Bruce Fields 10409dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10419dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10420964a3d3SNeilBrown { 10430964a3d3SNeilBrown char *mesg = buf; 10440964a3d3SNeilBrown char *recdir; 10450964a3d3SNeilBrown int len, status; 10460964a3d3SNeilBrown 10473dd98a3bSJeff Layton if (size > 0) { 10489dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10493dd98a3bSJeff Layton return -EBUSY; 10503dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10510964a3d3SNeilBrown return -EINVAL; 10520964a3d3SNeilBrown buf[size-1] = 0; 10530964a3d3SNeilBrown 10540964a3d3SNeilBrown recdir = mesg; 10550964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10560964a3d3SNeilBrown if (len <= 0) 10570964a3d3SNeilBrown return -EINVAL; 10580964a3d3SNeilBrown 10590964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 106069049961SAndi Kleen if (status) 106169049961SAndi Kleen return status; 10623dd98a3bSJeff Layton } 10633d72ab8fSChuck Lever 10643d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10653d72ab8fSChuck Lever nfs4_recoverydir()); 10660964a3d3SNeilBrown } 10673dd98a3bSJeff Layton 1068262a0982SChuck Lever /** 1069262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1070262a0982SChuck Lever * 1071262a0982SChuck Lever * Input: 1072262a0982SChuck Lever * buf: ignored 1073262a0982SChuck Lever * size: zero 1074262a0982SChuck Lever * 1075262a0982SChuck Lever * OR 1076262a0982SChuck Lever * 1077262a0982SChuck Lever * Input: 1078262a0982SChuck Lever * buf: C string containing the pathname 1079262a0982SChuck Lever * of the directory on a local file 1080262a0982SChuck Lever * system containing permanent NFSv4 1081262a0982SChuck Lever * recovery data 1082262a0982SChuck Lever * size: non-zero length of C string in @buf 1083262a0982SChuck Lever * Output: 1084262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1085262a0982SChuck Lever * containing the current recovery pathname setting; 1086262a0982SChuck Lever * return code is the size in bytes of the string 1087262a0982SChuck Lever * On error: return code is zero or a negative errno value 1088262a0982SChuck Lever */ 10893dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10903dd98a3bSJeff Layton { 10913dd98a3bSJeff Layton ssize_t rv; 1092244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10933dd98a3bSJeff Layton 10943dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10959dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10963dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10973dd98a3bSJeff Layton return rv; 10983dd98a3bSJeff Layton } 10993dd98a3bSJeff Layton 11007f5ef2e9SJeff Layton /** 11017f5ef2e9SJeff Layton * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 11027f5ef2e9SJeff Layton * 11037f5ef2e9SJeff Layton * Input: 11047f5ef2e9SJeff Layton * buf: ignored 11057f5ef2e9SJeff Layton * size: zero 11067f5ef2e9SJeff Layton * OR 11077f5ef2e9SJeff Layton * 11087f5ef2e9SJeff Layton * Input: 11097f5ef2e9SJeff Layton * buf: any value 11107f5ef2e9SJeff Layton * size: non-zero length of C string in @buf 11117f5ef2e9SJeff Layton * Output: 11127f5ef2e9SJeff Layton * passed-in buffer filled with "Y" or "N" with a newline 11137f5ef2e9SJeff Layton * and NULL-terminated C string. This indicates whether 11147f5ef2e9SJeff Layton * the grace period has ended in the current net 11157f5ef2e9SJeff Layton * namespace. Return code is the size in bytes of the 11167f5ef2e9SJeff Layton * string. Writing a string that starts with 'Y', 'y', or 11177f5ef2e9SJeff Layton * '1' to the file will end the grace period for nfsd's v4 11187f5ef2e9SJeff Layton * lock manager. 11197f5ef2e9SJeff Layton */ 11207f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 11217f5ef2e9SJeff Layton { 1122244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 11237f5ef2e9SJeff Layton 11247f5ef2e9SJeff Layton if (size > 0) { 11257f5ef2e9SJeff Layton switch(buf[0]) { 11267f5ef2e9SJeff Layton case 'Y': 11277f5ef2e9SJeff Layton case 'y': 11287f5ef2e9SJeff Layton case '1': 1129dd838821SYihao Wu if (!nn->nfsd_serv) 113062a063b8SJ. Bruce Fields return -EBUSY; 11317f5ef2e9SJeff Layton nfsd4_end_grace(nn); 11327f5ef2e9SJeff Layton break; 11337f5ef2e9SJeff Layton default: 11347f5ef2e9SJeff Layton return -EINVAL; 11357f5ef2e9SJeff Layton } 11367f5ef2e9SJeff Layton } 11377f5ef2e9SJeff Layton 11387f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 11397f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 11407f5ef2e9SJeff Layton } 11417f5ef2e9SJeff Layton 114270c3b76cSNeilBrown #endif 11430964a3d3SNeilBrown 11441da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11451da177e4SLinus Torvalds /* 11461da177e4SLinus Torvalds * populating the filesystem. 11471da177e4SLinus Torvalds */ 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 11501da177e4SLinus Torvalds { 1151cda37124SEric Biggers static const struct tree_descr nfsd_files[] = { 115296d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 1153e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1154e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 11554373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 11564373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 115717efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 115817efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 11591da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 11601da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1161eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 116203cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 1163a2f999a3SJeff Layton [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, 116470c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 116580212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1166596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 11675b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 1168b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 1169b0b0c0a2SKevin Coffman [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, 1170b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 11711da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 11721da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1173efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 11740964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 11757f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 11761da177e4SLinus Torvalds #endif 11771da177e4SLinus Torvalds /* last one */ {""} 11781da177e4SLinus Torvalds }; 1179d91ee87dSEric W. Biederman get_net(sb->s_fs_info); 1180d91ee87dSEric W. Biederman return simple_fill_super(sb, 0x6e667364, nfsd_files); 11811da177e4SLinus Torvalds } 11821da177e4SLinus Torvalds 1183fc14f2feSAl Viro static struct dentry *nfsd_mount(struct file_system_type *fs_type, 1184fc14f2feSAl Viro int flags, const char *dev_name, void *data) 11851da177e4SLinus Torvalds { 1186d91ee87dSEric W. Biederman struct net *net = current->nsproxy->net_ns; 1187d91ee87dSEric W. Biederman return mount_ns(fs_type, flags, data, net, net->user_ns, nfsd_fill_super); 118811f77942SStanislav Kinsbursky } 118911f77942SStanislav Kinsbursky 119011f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 119111f77942SStanislav Kinsbursky { 119211f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 119311f77942SStanislav Kinsbursky 119411f77942SStanislav Kinsbursky kill_litter_super(sb); 119511f77942SStanislav Kinsbursky put_net(net); 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds 11981da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 11991da177e4SLinus Torvalds .owner = THIS_MODULE, 12001da177e4SLinus Torvalds .name = "nfsd", 1201fc14f2feSAl Viro .mount = nfsd_mount, 120211f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 12031da177e4SLinus Torvalds }; 12047f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 12051da177e4SLinus Torvalds 1206e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1207e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1208e331f606SJ. Bruce Fields { 1209e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1210e331f606SJ. Bruce Fields 1211e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1212e331f606SJ. Bruce Fields if (!entry) 1213e331f606SJ. Bruce Fields return -ENOMEM; 121496d851c4SStanislav Kinsbursky entry = proc_create("exports", 0, entry, 121596d851c4SStanislav Kinsbursky &exports_proc_operations); 1216ff7c4b36Sfanchaoting if (!entry) { 1217ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1218e331f606SJ. Bruce Fields return -ENOMEM; 1219ff7c4b36Sfanchaoting } 1220e331f606SJ. Bruce Fields return 0; 1221e331f606SJ. Bruce Fields } 1222e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1223e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1224e331f606SJ. Bruce Fields { 1225e331f606SJ. Bruce Fields return 0; 1226e331f606SJ. Bruce Fields } 1227e331f606SJ. Bruce Fields #endif 1228e331f606SJ. Bruce Fields 1229c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 12305717e012SStanislav Kinsbursky 12315717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 12325717e012SStanislav Kinsbursky { 12335717e012SStanislav Kinsbursky int retval; 12343d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 12355717e012SStanislav Kinsbursky 12365717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 12375717e012SStanislav Kinsbursky if (retval) 12385717e012SStanislav Kinsbursky goto out_export_error; 1239f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1240f69adb2fSStanislav Kinsbursky if (retval) 1241f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1242*e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1243*e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 12443bf6b57eSJ. Bruce Fields nn->nfsd4_lease = 90; /* default lease time */ 12453bf6b57eSJ. Bruce Fields nn->nfsd4_grace = 90; 124603f318caSJ. Bruce Fields nn->somebody_reclaimed = false; 1247362063a5SScott Mayhew nn->track_reclaim_completes = false; 1248ebd7c72cSJ. Bruce Fields nn->clverifier_counter = prandom_u32(); 1249ebd7c72cSJ. Bruce Fields nn->clientid_counter = prandom_u32(); 1250e0639dc5SOlga Kornievskaia nn->s2s_cp_cl_id = nn->clientid_counter++; 12512317dc55SVasily Averin 12522317dc55SVasily Averin atomic_set(&nn->ntf_refcnt, 0); 12532317dc55SVasily Averin init_waitqueue_head(&nn->ntf_wq); 12545717e012SStanislav Kinsbursky return 0; 12555717e012SStanislav Kinsbursky 1256f69adb2fSStanislav Kinsbursky out_idmap_error: 1257f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 12585717e012SStanislav Kinsbursky out_export_error: 12595717e012SStanislav Kinsbursky return retval; 12605717e012SStanislav Kinsbursky } 12615717e012SStanislav Kinsbursky 12625717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 12635717e012SStanislav Kinsbursky { 1264f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 12655717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1266*e333f3bbSTrond Myklebust nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); 12675717e012SStanislav Kinsbursky } 12685717e012SStanislav Kinsbursky 12697ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 12705717e012SStanislav Kinsbursky .init = nfsd_init_net, 12715717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 12727ea34ac1SJeff Layton .id = &nfsd_net_id, 12737ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 12747ea34ac1SJeff Layton }; 12757ea34ac1SJeff Layton 12761da177e4SLinus Torvalds static int __init init_nfsd(void) 12771da177e4SLinus Torvalds { 12781da177e4SLinus Torvalds int retval; 12791da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 12801da177e4SLinus Torvalds 12817ea34ac1SJeff Layton retval = register_pernet_subsys(&nfsd_net_ops); 12827ea34ac1SJeff Layton if (retval < 0) 1283bb7ffbf2SGiuseppe Cantavenera return retval; 1284bb7ffbf2SGiuseppe Cantavenera retval = register_cld_notifier(); 1285e8ff2a84SJ. Bruce Fields if (retval) 12867ea34ac1SJeff Layton goto out_unregister_pernet; 1287bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1288bb7ffbf2SGiuseppe Cantavenera if (retval) 1289bb7ffbf2SGiuseppe Cantavenera goto out_unregister_notifier; 12909cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 129165178db4SBryan Schumaker if (retval) 129265178db4SBryan Schumaker goto out_free_slabs; 12939cf514ccSChristoph Hellwig retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ 12949cf514ccSChristoph Hellwig if (retval) 12959cf514ccSChristoph Hellwig goto out_exit_pnfs; 12961da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1297d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1298d5c3428bSJ. Bruce Fields if (retval) 1299d5c3428bSJ. Bruce Fields goto out_free_stat; 13001da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1301e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1302e331f606SJ. Bruce Fields if (retval) 1303f69adb2fSStanislav Kinsbursky goto out_free_lockd; 13041da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 130526808d3fSJ. Bruce Fields if (retval) 130626808d3fSJ. Bruce Fields goto out_free_all; 130726808d3fSJ. Bruce Fields return 0; 130826808d3fSJ. Bruce Fields out_free_all: 13091da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 13101da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1311dbf847ecSJ. Bruce Fields out_free_lockd: 13121da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1313e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1314d5c3428bSJ. Bruce Fields out_free_stat: 1315d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 131665178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 13179cf514ccSChristoph Hellwig out_exit_pnfs: 13189cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 131965178db4SBryan Schumaker out_free_slabs: 132046b25895SJ. Bruce Fields nfsd4_free_slabs(); 1321813fd320SJeff Layton out_unregister_notifier: 1322797a9d79SJeff Layton unregister_cld_notifier(); 1323bb7ffbf2SGiuseppe Cantavenera out_unregister_pernet: 1324bb7ffbf2SGiuseppe Cantavenera unregister_pernet_subsys(&nfsd_net_ops); 13251da177e4SLinus Torvalds return retval; 13261da177e4SLinus Torvalds } 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds static void __exit exit_nfsd(void) 13291da177e4SLinus Torvalds { 1330d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 13311da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 13321da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 13331da177e4SLinus Torvalds nfsd_stat_shutdown(); 13341da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1335e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 13369cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 133765178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 13381da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 1339797a9d79SJeff Layton unregister_cld_notifier(); 1340bb7ffbf2SGiuseppe Cantavenera unregister_pernet_subsys(&nfsd_net_ops); 13411da177e4SLinus Torvalds } 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 13441da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 13451da177e4SLinus Torvalds module_init(init_nfsd) 13461da177e4SLinus Torvalds module_exit(exit_nfsd) 1347