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" 249a74af21SBoaz Harrosh 251da177e4SLinus Torvalds /* 26b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 271da177e4SLinus Torvalds */ 281da177e4SLinus Torvalds enum { 291da177e4SLinus Torvalds NFSD_Root = 1, 301da177e4SLinus Torvalds NFSD_List, 31e8e8753fSJ. Bruce Fields NFSD_Export_features, 321da177e4SLinus Torvalds NFSD_Fh, 334373ea84SWendy Cheng NFSD_FO_UnlockIP, 3417efa372SWendy Cheng NFSD_FO_UnlockFS, 351da177e4SLinus Torvalds NFSD_Threads, 36eed2965aSGreg Banks NFSD_Pool_Threads, 3703cf6c9fSGreg Banks NFSD_Pool_Stats, 38a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 3970c3b76cSNeilBrown NFSD_Versions, 4080212d59SNeilBrown NFSD_Ports, 41596bbe53SNeilBrown NFSD_MaxBlkSize, 425b8db00bSJeff Layton NFSD_MaxConnections, 43b0b0c0a2SKevin Coffman NFSD_SupportedEnctypes, 4470c3b76cSNeilBrown /* 4570c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 4670c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 4770c3b76cSNeilBrown */ 4870c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 491da177e4SLinus Torvalds NFSD_Leasetime, 50efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 510964a3d3SNeilBrown NFSD_RecoveryDir, 527f5ef2e9SJeff Layton NFSD_V4EndGrace, 5370c3b76cSNeilBrown #endif 541da177e4SLinus Torvalds }; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds /* 571da177e4SLinus Torvalds * write() for these nodes. 581da177e4SLinus Torvalds */ 591da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 60b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 61b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 621da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 63eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 6470c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 6580212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 66596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 675b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 6870c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 691da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 70efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 710964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 727f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 7370c3b76cSNeilBrown #endif 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 761da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 77b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 78b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 791da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 80eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 8170c3b76cSNeilBrown [NFSD_Versions] = write_versions, 8280212d59SNeilBrown [NFSD_Ports] = write_ports, 83596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 845b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 8570c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 861da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 87efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 880964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 897f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 9070c3b76cSNeilBrown #endif 911da177e4SLinus Torvalds }; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 941da177e4SLinus Torvalds { 95496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 961da177e4SLinus Torvalds char *data; 971da177e4SLinus Torvalds ssize_t rv; 981da177e4SLinus Torvalds 99e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1001da177e4SLinus Torvalds return -EINVAL; 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1031da177e4SLinus Torvalds if (IS_ERR(data)) 1041da177e4SLinus Torvalds return PTR_ERR(data); 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1078971a101SNeilBrown if (rv >= 0) { 1081da177e4SLinus Torvalds simple_transaction_set(file, rv); 1091da177e4SLinus Torvalds rv = size; 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds return rv; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds 1147390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1157390022dSNeilBrown { 1167390022dSNeilBrown if (! file->private_data) { 1177390022dSNeilBrown /* An attempt to read a transaction file without writing 1187390022dSNeilBrown * causes a 0-byte write so that the file can return 1197390022dSNeilBrown * state information 1207390022dSNeilBrown */ 1217390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1227390022dSNeilBrown if (rv < 0) 1237390022dSNeilBrown return rv; 1247390022dSNeilBrown } 1257390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1267390022dSNeilBrown } 1277390022dSNeilBrown 1284b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1291da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1307390022dSNeilBrown .read = nfsctl_transaction_read, 1311da177e4SLinus Torvalds .release = simple_transaction_release, 1326038f373SArnd Bergmann .llseek = default_llseek, 1331da177e4SLinus Torvalds }; 1341da177e4SLinus Torvalds 13596d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1361da177e4SLinus Torvalds { 137f2c7ea10SStanislav Kinsbursky int err; 138f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 13996d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 140f2c7ea10SStanislav Kinsbursky 141f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 142f2c7ea10SStanislav Kinsbursky if (err) 143f2c7ea10SStanislav Kinsbursky return err; 144f2c7ea10SStanislav Kinsbursky 145f2c7ea10SStanislav Kinsbursky seq = file->private_data; 146e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 147f2c7ea10SStanislav Kinsbursky return 0; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 15096d851c4SStanislav Kinsbursky static int exports_proc_open(struct inode *inode, struct file *file) 15196d851c4SStanislav Kinsbursky { 15296d851c4SStanislav Kinsbursky return exports_net_open(current->nsproxy->net_ns, file); 15396d851c4SStanislav Kinsbursky } 15496d851c4SStanislav Kinsbursky 15596d851c4SStanislav Kinsbursky static const struct file_operations exports_proc_operations = { 15696d851c4SStanislav Kinsbursky .open = exports_proc_open, 15796d851c4SStanislav Kinsbursky .read = seq_read, 15896d851c4SStanislav Kinsbursky .llseek = seq_lseek, 15996d851c4SStanislav Kinsbursky .release = seq_release, 16096d851c4SStanislav Kinsbursky .owner = THIS_MODULE, 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, 1739ef2db26SDenis V. Lunev .owner = THIS_MODULE, 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 .owner = THIS_MODULE, 22003cf6c9fSGreg Banks }; 22103cf6c9fSGreg Banks 222a2f999a3SJeff Layton static struct file_operations reply_cache_stats_operations = { 223a2f999a3SJeff Layton .open = nfsd_reply_cache_stats_open, 224a2f999a3SJeff Layton .read = seq_read, 225a2f999a3SJeff Layton .llseek = seq_lseek, 226a2f999a3SJeff Layton .release = single_release, 227a2f999a3SJeff Layton }; 228a2f999a3SJeff Layton 2291da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 2301da177e4SLinus Torvalds /* 2311da177e4SLinus Torvalds * payload - write methods 2321da177e4SLinus Torvalds */ 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds 235262a0982SChuck Lever /** 236262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 237262a0982SChuck Lever * 238262a0982SChuck Lever * Experimental. 239262a0982SChuck Lever * 240262a0982SChuck Lever * Input: 241262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2424116092bSChuck Lever * presentation format IP address 243262a0982SChuck Lever * size: length of C string in @buf 244262a0982SChuck Lever * Output: 245262a0982SChuck Lever * On success: returns zero if all specified locks were released; 246262a0982SChuck Lever * returns one if one or more locks were not released 247262a0982SChuck Lever * On error: return code is negative errno value 248262a0982SChuck Lever */ 249b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2504373ea84SWendy Cheng { 2514116092bSChuck Lever struct sockaddr_storage address; 2524116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2534116092bSChuck Lever size_t salen = sizeof(address); 254367c8c7bSChuck Lever char *fo_path; 25511f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 2564373ea84SWendy Cheng 2574373ea84SWendy Cheng /* sanity check */ 2584373ea84SWendy Cheng if (size == 0) 2594373ea84SWendy Cheng return -EINVAL; 2604373ea84SWendy Cheng 2614373ea84SWendy Cheng if (buf[size-1] != '\n') 2624373ea84SWendy Cheng return -EINVAL; 2634373ea84SWendy Cheng 2644373ea84SWendy Cheng fo_path = buf; 2654373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2664373ea84SWendy Cheng return -EINVAL; 2674373ea84SWendy Cheng 26811f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2694373ea84SWendy Cheng return -EINVAL; 2704373ea84SWendy Cheng 2714116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2724373ea84SWendy Cheng } 2734373ea84SWendy Cheng 274262a0982SChuck Lever /** 275262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 276262a0982SChuck Lever * 277262a0982SChuck Lever * Experimental. 278262a0982SChuck Lever * 279262a0982SChuck Lever * Input: 280262a0982SChuck Lever * buf: '\n'-terminated C string containing the 281262a0982SChuck Lever * absolute pathname of a local file system 282262a0982SChuck Lever * size: length of C string in @buf 283262a0982SChuck Lever * Output: 284262a0982SChuck Lever * On success: returns zero if all specified locks were released; 285262a0982SChuck Lever * returns one if one or more locks were not released 286262a0982SChuck Lever * On error: return code is negative errno value 287262a0982SChuck Lever */ 288b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 28917efa372SWendy Cheng { 290a63bb996SAl Viro struct path path; 29117efa372SWendy Cheng char *fo_path; 29217efa372SWendy Cheng int error; 29317efa372SWendy Cheng 29417efa372SWendy Cheng /* sanity check */ 29517efa372SWendy Cheng if (size == 0) 29617efa372SWendy Cheng return -EINVAL; 29717efa372SWendy Cheng 29817efa372SWendy Cheng if (buf[size-1] != '\n') 29917efa372SWendy Cheng return -EINVAL; 30017efa372SWendy Cheng 30117efa372SWendy Cheng fo_path = buf; 30217efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 30317efa372SWendy Cheng return -EINVAL; 30417efa372SWendy Cheng 305a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 30617efa372SWendy Cheng if (error) 30717efa372SWendy Cheng return error; 30817efa372SWendy Cheng 309262a0982SChuck Lever /* 310262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 311262a0982SChuck Lever * releasing locks on the wrong file system. 312262a0982SChuck Lever * 313262a0982SChuck Lever * For example: 314262a0982SChuck Lever * 1. Does the path refer to a directory? 315262a0982SChuck Lever * 2. Is that directory a mount point, or 316262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 317262a0982SChuck Lever */ 318d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 31917efa372SWendy Cheng 320a63bb996SAl Viro path_put(&path); 32117efa372SWendy Cheng return error; 32217efa372SWendy Cheng } 32317efa372SWendy Cheng 324262a0982SChuck Lever /** 325262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 326262a0982SChuck Lever * 327262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 328262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 329262a0982SChuck Lever * contain escape sequences. 330262a0982SChuck Lever * 331262a0982SChuck Lever * Input: 332262a0982SChuck Lever * buf: 333262a0982SChuck Lever * domain: client domain name 334262a0982SChuck Lever * path: export pathname 335262a0982SChuck Lever * maxsize: numeric maximum size of 336262a0982SChuck Lever * @buf 337262a0982SChuck Lever * size: length of C string in @buf 338262a0982SChuck Lever * Output: 339262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 340262a0982SChuck Lever * string containing a ASCII hex text version 341262a0982SChuck Lever * of the NFS file handle; 342262a0982SChuck Lever * return code is the size in bytes of the string 343262a0982SChuck Lever * On error: return code is negative errno value 344262a0982SChuck Lever */ 3451da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds char *dname, *path; 348246d95baSAndrew Morton int uninitialized_var(maxsize); 3491da177e4SLinus Torvalds char *mesg = buf; 3501da177e4SLinus Torvalds int len; 3511da177e4SLinus Torvalds struct auth_domain *dom; 3521da177e4SLinus Torvalds struct knfsd_fh fh; 35311f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 3541da177e4SLinus Torvalds 35587d26ea7SJ. Bruce Fields if (size == 0) 35687d26ea7SJ. Bruce Fields return -EINVAL; 35787d26ea7SJ. Bruce Fields 3581da177e4SLinus Torvalds if (buf[size-1] != '\n') 3591da177e4SLinus Torvalds return -EINVAL; 3601da177e4SLinus Torvalds buf[size-1] = 0; 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds dname = mesg; 3631da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 36454224f04SChuck Lever if (len <= 0) 36554224f04SChuck Lever return -EINVAL; 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds path = dname+len+1; 3681da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 36954224f04SChuck Lever if (len <= 0) 37054224f04SChuck Lever return -EINVAL; 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3731da177e4SLinus Torvalds if (len) 3741da177e4SLinus Torvalds return len; 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3771da177e4SLinus Torvalds return -EINVAL; 3783c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size)>0) 3811da177e4SLinus Torvalds return -EINVAL; 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3841da177e4SLinus Torvalds dom = unix_domain_find(dname); 3851da177e4SLinus Torvalds if (!dom) 3861da177e4SLinus Torvalds return -ENOMEM; 3871da177e4SLinus Torvalds 38811f77942SStanislav Kinsbursky len = exp_rootfh(net, dom, path, &fh, maxsize); 3891da177e4SLinus Torvalds auth_domain_put(dom); 3901da177e4SLinus Torvalds if (len) 3911da177e4SLinus Torvalds return len; 3921da177e4SLinus Torvalds 39354224f04SChuck Lever mesg = buf; 39454224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 3951da177e4SLinus Torvalds qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 3961da177e4SLinus Torvalds mesg[-1] = '\n'; 3971da177e4SLinus Torvalds return mesg - buf; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds 400262a0982SChuck Lever /** 401262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 402262a0982SChuck Lever * 403262a0982SChuck Lever * Input: 404262a0982SChuck Lever * buf: ignored 405262a0982SChuck Lever * size: zero 406262a0982SChuck Lever * Output: 407262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 408262a0982SChuck Lever * string numeric value representing the number of 409262a0982SChuck Lever * running NFSD threads; 410262a0982SChuck Lever * return code is the size in bytes of the string 411262a0982SChuck Lever * On error: return code is zero 412262a0982SChuck Lever * 413262a0982SChuck Lever * OR 414262a0982SChuck Lever * 415262a0982SChuck Lever * Input: 416262a0982SChuck Lever * buf: C string containing an unsigned 417262a0982SChuck Lever * integer value representing the 418262a0982SChuck Lever * number of NFSD threads to start 419262a0982SChuck Lever * size: non-zero length of C string in @buf 420262a0982SChuck Lever * Output: 421262a0982SChuck Lever * On success: NFS service is started; 422262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 423262a0982SChuck Lever * string numeric value representing the number of 424262a0982SChuck Lever * running NFSD threads; 425262a0982SChuck Lever * return code is the size in bytes of the string 426262a0982SChuck Lever * On error: return code is zero or a negative errno value 427262a0982SChuck Lever */ 4281da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 4291da177e4SLinus Torvalds { 4301da177e4SLinus Torvalds char *mesg = buf; 4311da177e4SLinus Torvalds int rv; 43211f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 433d41a9417SStanislav Kinsbursky 4341da177e4SLinus Torvalds if (size > 0) { 4351da177e4SLinus Torvalds int newthreads; 4361da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4371da177e4SLinus Torvalds if (rv) 4381da177e4SLinus Torvalds return rv; 4391da177e4SLinus Torvalds if (newthreads < 0) 4401da177e4SLinus Torvalds return -EINVAL; 441d41a9417SStanislav Kinsbursky rv = nfsd_svc(newthreads, net); 44282e12fe9SNeilBrown if (rv < 0) 4431da177e4SLinus Torvalds return rv; 44482e12fe9SNeilBrown } else 4459dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 446e06b6405SChuck Lever 44782e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 450262a0982SChuck Lever /** 451262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 452262a0982SChuck Lever * 453262a0982SChuck Lever * Input: 454262a0982SChuck Lever * buf: ignored 455262a0982SChuck Lever * size: zero 456262a0982SChuck Lever * 457262a0982SChuck Lever * OR 458262a0982SChuck Lever * 459262a0982SChuck Lever * Input: 460262a0982SChuck Lever * buf: C string containing whitespace- 461262a0982SChuck Lever * separated unsigned integer values 462262a0982SChuck Lever * representing the number of NFSD 463262a0982SChuck Lever * threads to start in each pool 464262a0982SChuck Lever * size: non-zero length of C string in @buf 465262a0982SChuck Lever * Output: 466262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 467262a0982SChuck Lever * string containing integer values representing the 468262a0982SChuck Lever * number of NFSD threads in each pool; 469262a0982SChuck Lever * return code is the size in bytes of the string 470262a0982SChuck Lever * On error: return code is zero or a negative errno value 471262a0982SChuck Lever */ 472eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 473eed2965aSGreg Banks { 474eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 475eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 476eed2965aSGreg Banks */ 477eed2965aSGreg Banks char *mesg = buf; 478eed2965aSGreg Banks int i; 479eed2965aSGreg Banks int rv; 480eed2965aSGreg Banks int len; 481bedbdd8bSNeil Brown int npools; 482eed2965aSGreg Banks int *nthreads; 48311f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 484eed2965aSGreg Banks 485bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4869dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 487eed2965aSGreg Banks if (npools == 0) { 488eed2965aSGreg Banks /* 489eed2965aSGreg Banks * NFS is shut down. The admin can start it by 490eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 491eed2965aSGreg Banks * file, sorry. Report zero threads. 492eed2965aSGreg Banks */ 493bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 494eed2965aSGreg Banks strcpy(buf, "0\n"); 495eed2965aSGreg Banks return strlen(buf); 496eed2965aSGreg Banks } 497eed2965aSGreg Banks 498eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 499bedbdd8bSNeil Brown rv = -ENOMEM; 500eed2965aSGreg Banks if (nthreads == NULL) 501bedbdd8bSNeil Brown goto out_free; 502eed2965aSGreg Banks 503eed2965aSGreg Banks if (size > 0) { 504eed2965aSGreg Banks for (i = 0; i < npools; i++) { 505eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 506eed2965aSGreg Banks if (rv == -ENOENT) 507eed2965aSGreg Banks break; /* fewer numbers than pools */ 508eed2965aSGreg Banks if (rv) 509eed2965aSGreg Banks goto out_free; /* syntax error */ 510eed2965aSGreg Banks rv = -EINVAL; 511eed2965aSGreg Banks if (nthreads[i] < 0) 512eed2965aSGreg Banks goto out_free; 513eed2965aSGreg Banks } 5143938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 515eed2965aSGreg Banks if (rv) 516eed2965aSGreg Banks goto out_free; 517eed2965aSGreg Banks } 518eed2965aSGreg Banks 5199dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 520eed2965aSGreg Banks if (rv) 521eed2965aSGreg Banks goto out_free; 522eed2965aSGreg Banks 523eed2965aSGreg Banks mesg = buf; 524eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 525eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 526eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 527eed2965aSGreg Banks len = strlen(mesg); 528eed2965aSGreg Banks size -= len; 529eed2965aSGreg Banks mesg += len; 530eed2965aSGreg Banks } 531413d63d7SJ. Bruce Fields rv = mesg - buf; 532eed2965aSGreg Banks out_free: 533eed2965aSGreg Banks kfree(nthreads); 534bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 535eed2965aSGreg Banks return rv; 536eed2965aSGreg Banks } 537eed2965aSGreg Banks 5383dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 53970c3b76cSNeilBrown { 54070c3b76cSNeilBrown char *mesg = buf; 5418daf220aSBenny Halevy char *vers, *minorp, sign; 542261758b5SChuck Lever int len, num, remaining; 5438daf220aSBenny Halevy unsigned minor; 54470c3b76cSNeilBrown ssize_t tlen = 0; 54570c3b76cSNeilBrown char *sep; 54611f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 5479dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 54870c3b76cSNeilBrown 54970c3b76cSNeilBrown if (size>0) { 5509dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5516658d3a7SNeilBrown /* Cannot change versions without updating 5529dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5536658d3a7SNeilBrown * rq_argp and rq_resp 5546658d3a7SNeilBrown */ 55570c3b76cSNeilBrown return -EBUSY; 55670c3b76cSNeilBrown if (buf[size-1] != '\n') 55770c3b76cSNeilBrown return -EINVAL; 55870c3b76cSNeilBrown buf[size-1] = 0; 55970c3b76cSNeilBrown 56070c3b76cSNeilBrown vers = mesg; 56170c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 56270c3b76cSNeilBrown if (len <= 0) return -EINVAL; 56370c3b76cSNeilBrown do { 56470c3b76cSNeilBrown sign = *vers; 56570c3b76cSNeilBrown if (sign == '+' || sign == '-') 5668daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 56770c3b76cSNeilBrown else 5688daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5698daf220aSBenny Halevy if (*minorp == '.') { 570ff89be87SJ. Bruce Fields if (num != 4) 5718daf220aSBenny Halevy return -EINVAL; 5728daf220aSBenny Halevy minor = simple_strtoul(minorp+1, NULL, 0); 5738daf220aSBenny Halevy if (minor == 0) 5748daf220aSBenny Halevy return -EINVAL; 5758daf220aSBenny Halevy if (nfsd_minorversion(minor, sign == '-' ? 5768daf220aSBenny Halevy NFSD_CLEAR : NFSD_SET) < 0) 5778daf220aSBenny Halevy return -EINVAL; 5788daf220aSBenny Halevy goto next; 5798daf220aSBenny Halevy } 58070c3b76cSNeilBrown switch(num) { 58170c3b76cSNeilBrown case 2: 58270c3b76cSNeilBrown case 3: 58370c3b76cSNeilBrown case 4: 5846658d3a7SNeilBrown nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 58570c3b76cSNeilBrown break; 58670c3b76cSNeilBrown default: 58770c3b76cSNeilBrown return -EINVAL; 58870c3b76cSNeilBrown } 5898daf220aSBenny Halevy next: 59070c3b76cSNeilBrown vers += len + 1; 59170c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 59270c3b76cSNeilBrown /* If all get turned off, turn them back on, as 59370c3b76cSNeilBrown * having no versions is BAD 59470c3b76cSNeilBrown */ 5956658d3a7SNeilBrown nfsd_reset_versions(); 59670c3b76cSNeilBrown } 597261758b5SChuck Lever 59870c3b76cSNeilBrown /* Now write current state into reply buffer */ 59970c3b76cSNeilBrown len = 0; 60070c3b76cSNeilBrown sep = ""; 601261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 60270c3b76cSNeilBrown for (num=2 ; num <= 4 ; num++) 6036658d3a7SNeilBrown if (nfsd_vers(num, NFSD_AVAIL)) { 604261758b5SChuck Lever len = snprintf(buf, remaining, "%s%c%d", sep, 6056658d3a7SNeilBrown nfsd_vers(num, NFSD_TEST)?'+':'-', 60670c3b76cSNeilBrown num); 60770c3b76cSNeilBrown sep = " "; 608261758b5SChuck Lever 609261758b5SChuck Lever if (len > remaining) 610261758b5SChuck Lever break; 611261758b5SChuck Lever remaining -= len; 612261758b5SChuck Lever buf += len; 613261758b5SChuck Lever tlen += len; 61470c3b76cSNeilBrown } 6158daf220aSBenny Halevy if (nfsd_vers(4, NFSD_AVAIL)) 616261758b5SChuck Lever for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 617261758b5SChuck Lever minor++) { 618261758b5SChuck Lever len = snprintf(buf, remaining, " %c4.%u", 6198daf220aSBenny Halevy (nfsd_vers(4, NFSD_TEST) && 6208daf220aSBenny Halevy nfsd_minorversion(minor, NFSD_TEST)) ? 6218daf220aSBenny Halevy '+' : '-', 6228daf220aSBenny Halevy minor); 623261758b5SChuck Lever 624261758b5SChuck Lever if (len > remaining) 625261758b5SChuck Lever break; 626261758b5SChuck Lever remaining -= len; 627261758b5SChuck Lever buf += len; 628261758b5SChuck Lever tlen += len; 629261758b5SChuck Lever } 630261758b5SChuck Lever 631261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 632261758b5SChuck Lever if (len > remaining) 633261758b5SChuck Lever return -EINVAL; 634261758b5SChuck Lever return tlen + len; 63570c3b76cSNeilBrown } 63670c3b76cSNeilBrown 637262a0982SChuck Lever /** 638262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 639262a0982SChuck Lever * 640262a0982SChuck Lever * Input: 641262a0982SChuck Lever * buf: ignored 642262a0982SChuck Lever * size: zero 643262a0982SChuck Lever * Output: 644262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 645262a0982SChuck Lever * string containing positive or negative integer 646262a0982SChuck Lever * values representing the current status of each 647262a0982SChuck Lever * protocol version; 648262a0982SChuck Lever * return code is the size in bytes of the string 649262a0982SChuck Lever * On error: return code is zero or a negative errno value 650262a0982SChuck Lever * 651262a0982SChuck Lever * OR 652262a0982SChuck Lever * 653262a0982SChuck Lever * Input: 654262a0982SChuck Lever * buf: C string containing whitespace- 655262a0982SChuck Lever * separated positive or negative 656262a0982SChuck Lever * integer values representing NFS 657262a0982SChuck Lever * protocol versions to enable ("+n") 658262a0982SChuck Lever * or disable ("-n") 659262a0982SChuck Lever * size: non-zero length of C string in @buf 660262a0982SChuck Lever * Output: 661262a0982SChuck Lever * On success: status of zero or more protocol versions has 662262a0982SChuck Lever * been updated; passed-in buffer filled with 663262a0982SChuck Lever * '\n'-terminated C string containing positive 664262a0982SChuck Lever * or negative integer values representing the 665262a0982SChuck Lever * current status of each protocol version; 666262a0982SChuck Lever * return code is the size in bytes of the string 667262a0982SChuck Lever * On error: return code is zero or a negative errno value 668262a0982SChuck Lever */ 6693dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6703dd98a3bSJeff Layton { 6713dd98a3bSJeff Layton ssize_t rv; 6723dd98a3bSJeff Layton 6733dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6743dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6753dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6763dd98a3bSJeff Layton return rv; 6773dd98a3bSJeff Layton } 6783dd98a3bSJeff Layton 6794cd5dc75SChuck Lever /* 6800a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 6810a5372d8SChuck Lever * transports. 6820a5372d8SChuck Lever */ 6839dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 6840a5372d8SChuck Lever { 6859dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6869dd9845fSStanislav Kinsbursky 6879dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 6880a5372d8SChuck Lever return 0; 6899dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 6900a5372d8SChuck Lever } 6910a5372d8SChuck Lever 6920a5372d8SChuck Lever /* 6930b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 6940b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 6950b7c2f6fSChuck Lever * nfsd listener. 6960b7c2f6fSChuck Lever */ 69708160352SStanislav Kinsbursky static ssize_t __write_ports_addfd(char *buf, struct net *net) 6980b7c2f6fSChuck Lever { 6990b7c2f6fSChuck Lever char *mesg = buf; 7000b7c2f6fSChuck Lever int fd, err; 7019dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7020b7c2f6fSChuck Lever 7030b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 7040b7c2f6fSChuck Lever if (err != 0 || fd < 0) 7050b7c2f6fSChuck Lever return -EINVAL; 7060b7c2f6fSChuck Lever 70730646394SStanislav Kinsbursky if (svc_alien_sock(net, fd)) { 70830646394SStanislav Kinsbursky printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); 70930646394SStanislav Kinsbursky return -EINVAL; 71030646394SStanislav Kinsbursky } 71130646394SStanislav Kinsbursky 7126777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7130b7c2f6fSChuck Lever if (err != 0) 7140b7c2f6fSChuck Lever return err; 7150b7c2f6fSChuck Lever 7169dd9845fSStanislav Kinsbursky err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 71778a8d7c8SJeff Layton if (err < 0) { 71819f7e2caSStanislav Kinsbursky nfsd_destroy(net); 71978a8d7c8SJeff Layton return err; 72078a8d7c8SJeff Layton } 721ea068badSChuck Lever 7220b7c2f6fSChuck Lever /* Decrease the count, but don't shut down the service */ 7239dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 724ea068badSChuck Lever return err; 7250b7c2f6fSChuck Lever } 7260b7c2f6fSChuck Lever 7270b7c2f6fSChuck Lever /* 7284eb68c26SChuck Lever * A transport listener is added by writing it's transport name and 7294eb68c26SChuck Lever * a port number. 7304eb68c26SChuck Lever */ 73108160352SStanislav Kinsbursky static ssize_t __write_ports_addxprt(char *buf, struct net *net) 7324eb68c26SChuck Lever { 7334eb68c26SChuck Lever char transport[16]; 73437498292SChuck Lever struct svc_xprt *xprt; 7354eb68c26SChuck Lever int port, err; 7369dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7374eb68c26SChuck Lever 738a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7394eb68c26SChuck Lever return -EINVAL; 7404eb68c26SChuck Lever 7414be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7424eb68c26SChuck Lever return -EINVAL; 7434eb68c26SChuck Lever 7446777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7454eb68c26SChuck Lever if (err != 0) 7464eb68c26SChuck Lever return err; 7474eb68c26SChuck Lever 7489dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 7494eb68c26SChuck Lever PF_INET, port, SVC_SOCK_ANONYMOUS); 75068717908SChuck Lever if (err < 0) 75137498292SChuck Lever goto out_err; 75237498292SChuck Lever 7539dd9845fSStanislav Kinsbursky err = svc_create_xprt(nn->nfsd_serv, transport, net, 75437498292SChuck Lever PF_INET6, port, SVC_SOCK_ANONYMOUS); 75537498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 75637498292SChuck Lever goto out_close; 7570cd14a06SJeff Layton 7580cd14a06SJeff Layton /* Decrease the count, but don't shut down the service */ 7599dd9845fSStanislav Kinsbursky nn->nfsd_serv->sv_nrthreads--; 7604eb68c26SChuck Lever return 0; 76137498292SChuck Lever out_close: 7629dd9845fSStanislav Kinsbursky xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 76337498292SChuck Lever if (xprt != NULL) { 76437498292SChuck Lever svc_close_xprt(xprt); 76537498292SChuck Lever svc_xprt_put(xprt); 76637498292SChuck Lever } 76737498292SChuck Lever out_err: 76819f7e2caSStanislav Kinsbursky nfsd_destroy(net); 76937498292SChuck Lever return err; 7704eb68c26SChuck Lever } 7714eb68c26SChuck Lever 77208160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 77308160352SStanislav Kinsbursky struct net *net) 77480212d59SNeilBrown { 7750a5372d8SChuck Lever if (size == 0) 7769dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 7770b7c2f6fSChuck Lever 7780b7c2f6fSChuck Lever if (isdigit(buf[0])) 77908160352SStanislav Kinsbursky return __write_ports_addfd(buf, net); 78082d56591SChuck Lever 7814eb68c26SChuck Lever if (isalpha(buf[0])) 78208160352SStanislav Kinsbursky return __write_ports_addxprt(buf, net); 7834cd5dc75SChuck Lever 784b41b66d6SNeilBrown return -EINVAL; 785b41b66d6SNeilBrown } 78680212d59SNeilBrown 787262a0982SChuck Lever /** 788262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 789262a0982SChuck Lever * 790262a0982SChuck Lever * Input: 791262a0982SChuck Lever * buf: ignored 792262a0982SChuck Lever * size: zero 793262a0982SChuck Lever * Output: 794262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 795262a0982SChuck Lever * string containing a whitespace-separated list of 796262a0982SChuck Lever * named NFSD listeners; 797262a0982SChuck Lever * return code is the size in bytes of the string 798262a0982SChuck Lever * On error: return code is zero or a negative errno value 799262a0982SChuck Lever * 800262a0982SChuck Lever * OR 801262a0982SChuck Lever * 802262a0982SChuck Lever * Input: 803262a0982SChuck Lever * buf: C string containing an unsigned 804262a0982SChuck Lever * integer value representing a bound 805262a0982SChuck Lever * but unconnected socket that is to be 806c71206a7SChuck Lever * used as an NFSD listener; listen(3) 807c71206a7SChuck Lever * must be called for a SOCK_STREAM 808c71206a7SChuck Lever * socket, otherwise it is ignored 809262a0982SChuck Lever * size: non-zero length of C string in @buf 810262a0982SChuck Lever * Output: 811262a0982SChuck Lever * On success: NFS service is started; 812262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 813262a0982SChuck Lever * string containing a unique alphanumeric name of 814262a0982SChuck Lever * the listener; 815262a0982SChuck Lever * return code is the size in bytes of the string 816262a0982SChuck Lever * On error: return code is a negative errno value 817262a0982SChuck Lever * 818262a0982SChuck Lever * OR 819262a0982SChuck Lever * 820262a0982SChuck Lever * Input: 821262a0982SChuck Lever * buf: C string containing a transport 822262a0982SChuck Lever * name and an unsigned integer value 823262a0982SChuck Lever * representing the port to listen on, 824262a0982SChuck Lever * separated by whitespace 825262a0982SChuck Lever * size: non-zero length of C string in @buf 826262a0982SChuck Lever * Output: 827262a0982SChuck Lever * On success: returns zero; NFS service is started 828262a0982SChuck Lever * On error: return code is a negative errno value 829262a0982SChuck Lever */ 830bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 831bedbdd8bSNeil Brown { 832bedbdd8bSNeil Brown ssize_t rv; 83311f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 8343dd98a3bSJeff Layton 835bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 83608160352SStanislav Kinsbursky rv = __write_ports(file, buf, size, net); 837bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 838bedbdd8bSNeil Brown return rv; 839bedbdd8bSNeil Brown } 840bedbdd8bSNeil Brown 841bedbdd8bSNeil Brown 842596bbe53SNeilBrown int nfsd_max_blksize; 843596bbe53SNeilBrown 844262a0982SChuck Lever /** 845262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 846262a0982SChuck Lever * 847262a0982SChuck Lever * Input: 848262a0982SChuck Lever * buf: ignored 849262a0982SChuck Lever * size: zero 850262a0982SChuck Lever * 851262a0982SChuck Lever * OR 852262a0982SChuck Lever * 853262a0982SChuck Lever * Input: 854262a0982SChuck Lever * buf: C string containing an unsigned 855262a0982SChuck Lever * integer value representing the new 856262a0982SChuck Lever * NFS blksize 857262a0982SChuck Lever * size: non-zero length of C string in @buf 858262a0982SChuck Lever * Output: 859262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 860262a0982SChuck Lever * containing numeric value of the current NFS blksize 861262a0982SChuck Lever * setting; 862262a0982SChuck Lever * return code is the size in bytes of the string 863262a0982SChuck Lever * On error: return code is zero or a negative errno value 864262a0982SChuck Lever */ 865596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 866596bbe53SNeilBrown { 867596bbe53SNeilBrown char *mesg = buf; 86811f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 8699dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 8709dd9845fSStanislav Kinsbursky 871596bbe53SNeilBrown if (size > 0) { 872596bbe53SNeilBrown int bsize; 873596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 874596bbe53SNeilBrown if (rv) 875596bbe53SNeilBrown return rv; 876596bbe53SNeilBrown /* force bsize into allowed range and 877596bbe53SNeilBrown * required alignment. 878596bbe53SNeilBrown */ 8793c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 8803c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 881596bbe53SNeilBrown bsize &= ~(1024-1); 882bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 8839dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 884bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 885596bbe53SNeilBrown return -EBUSY; 886596bbe53SNeilBrown } 887596bbe53SNeilBrown nfsd_max_blksize = bsize; 888bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 889596bbe53SNeilBrown } 890e06b6405SChuck Lever 891e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 892e06b6405SChuck Lever nfsd_max_blksize); 893596bbe53SNeilBrown } 894596bbe53SNeilBrown 8955b8db00bSJeff Layton /** 8965b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 8975b8db00bSJeff Layton * 8985b8db00bSJeff Layton * Input: 8995b8db00bSJeff Layton * buf: ignored 9005b8db00bSJeff Layton * size: zero 9015b8db00bSJeff Layton * OR 9025b8db00bSJeff Layton * 9035b8db00bSJeff Layton * Input: 9045b8db00bSJeff Layton * buf: C string containing an unsigned 9055b8db00bSJeff Layton * integer value representing the new 9065b8db00bSJeff Layton * number of max connections 9075b8db00bSJeff Layton * size: non-zero length of C string in @buf 9085b8db00bSJeff Layton * Output: 9095b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9105b8db00bSJeff Layton * containing numeric value of max_connections setting 9115b8db00bSJeff Layton * for this net namespace; 9125b8db00bSJeff Layton * return code is the size in bytes of the string 9135b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9145b8db00bSJeff Layton */ 9155b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9165b8db00bSJeff Layton { 9175b8db00bSJeff Layton char *mesg = buf; 9185b8db00bSJeff Layton struct net *net = file->f_dentry->d_sb->s_fs_info; 9195b8db00bSJeff Layton struct nfsd_net *nn = net_generic(net, nfsd_net_id); 9205b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9215b8db00bSJeff Layton 9225b8db00bSJeff Layton if (size > 0) { 9235b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9245b8db00bSJeff Layton 9255b8db00bSJeff Layton if (rv) 9265b8db00bSJeff Layton return rv; 9275b8db00bSJeff Layton nn->max_connections = maxconn; 9285b8db00bSJeff Layton } 9295b8db00bSJeff Layton 9305b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9315b8db00bSJeff Layton } 9325b8db00bSJeff Layton 93370c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9349dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 9359dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 9361da177e4SLinus Torvalds { 9371da177e4SLinus Torvalds char *mesg = buf; 938f0135740SJ. Bruce Fields int rv, i; 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds if (size > 0) { 9419dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9423dd98a3bSJeff Layton return -EBUSY; 943f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9441da177e4SLinus Torvalds if (rv) 9451da177e4SLinus Torvalds return rv; 946e7b184f1SJ. Bruce Fields /* 947e7b184f1SJ. Bruce Fields * Some sanity checking. We don't have a reason for 948e7b184f1SJ. Bruce Fields * these particular numbers, but problems with the 949e7b184f1SJ. Bruce Fields * extremes are: 950e7b184f1SJ. Bruce Fields * - Too short: the briefest network outage may 951e7b184f1SJ. Bruce Fields * cause clients to lose all their locks. Also, 952e7b184f1SJ. Bruce Fields * the frequent polling may be wasteful. 953e7b184f1SJ. Bruce Fields * - Too long: do you really want reboot recovery 954e7b184f1SJ. Bruce Fields * to take more than an hour? Or to make other 955e7b184f1SJ. Bruce Fields * clients wait an hour before being able to 956e7b184f1SJ. Bruce Fields * revoke a dead client's locks? 957e7b184f1SJ. Bruce Fields */ 958f0135740SJ. Bruce Fields if (i < 10 || i > 3600) 9591da177e4SLinus Torvalds return -EINVAL; 960f0135740SJ. Bruce Fields *time = i; 9611da177e4SLinus Torvalds } 962e06b6405SChuck Lever 963f0135740SJ. Bruce Fields return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 964f0135740SJ. Bruce Fields } 965f0135740SJ. Bruce Fields 9669dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 9679dd9845fSStanislav Kinsbursky time_t *time, struct nfsd_net *nn) 968f0135740SJ. Bruce Fields { 969f0135740SJ. Bruce Fields ssize_t rv; 970f0135740SJ. Bruce Fields 971f0135740SJ. Bruce Fields mutex_lock(&nfsd_mutex); 9729dd9845fSStanislav Kinsbursky rv = __nfsd4_write_time(file, buf, size, time, nn); 973f0135740SJ. Bruce Fields mutex_unlock(&nfsd_mutex); 974f0135740SJ. Bruce Fields return rv; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 977262a0982SChuck Lever /** 978262a0982SChuck Lever * write_leasetime - Set or report the current NFSv4 lease time 979262a0982SChuck Lever * 980262a0982SChuck Lever * Input: 981262a0982SChuck Lever * buf: ignored 982262a0982SChuck Lever * size: zero 983262a0982SChuck Lever * 984262a0982SChuck Lever * OR 985262a0982SChuck Lever * 986262a0982SChuck Lever * Input: 987262a0982SChuck Lever * buf: C string containing an unsigned 988262a0982SChuck Lever * integer value representing the new 989262a0982SChuck Lever * NFSv4 lease expiry time 990262a0982SChuck Lever * size: non-zero length of C string in @buf 991262a0982SChuck Lever * Output: 992262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 993262a0982SChuck Lever * string containing unsigned integer value of the 994262a0982SChuck Lever * current lease expiry time; 995262a0982SChuck Lever * return code is the size in bytes of the string 996262a0982SChuck Lever * On error: return code is zero or a negative errno value 997262a0982SChuck Lever */ 9983dd98a3bSJeff Layton static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 9993dd98a3bSJeff Layton { 100011f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 100111f77942SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 10029dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 10033dd98a3bSJeff Layton } 10043dd98a3bSJeff Layton 1005efc4bb4fSJ. Bruce Fields /** 1006efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1007efc4bb4fSJ. Bruce Fields * 1008efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1009efc4bb4fSJ. Bruce Fields * 1010efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1011efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1012efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1013efc4bb4fSJ. Bruce Fields * anyway.) 1014efc4bb4fSJ. Bruce Fields */ 1015efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1016efc4bb4fSJ. Bruce Fields { 101711f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 101811f77942SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 10199dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1020efc4bb4fSJ. Bruce Fields } 1021efc4bb4fSJ. Bruce Fields 10229dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10239dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10240964a3d3SNeilBrown { 10250964a3d3SNeilBrown char *mesg = buf; 10260964a3d3SNeilBrown char *recdir; 10270964a3d3SNeilBrown int len, status; 10280964a3d3SNeilBrown 10293dd98a3bSJeff Layton if (size > 0) { 10309dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10313dd98a3bSJeff Layton return -EBUSY; 10323dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10330964a3d3SNeilBrown return -EINVAL; 10340964a3d3SNeilBrown buf[size-1] = 0; 10350964a3d3SNeilBrown 10360964a3d3SNeilBrown recdir = mesg; 10370964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10380964a3d3SNeilBrown if (len <= 0) 10390964a3d3SNeilBrown return -EINVAL; 10400964a3d3SNeilBrown 10410964a3d3SNeilBrown status = nfs4_reset_recoverydir(recdir); 104269049961SAndi Kleen if (status) 104369049961SAndi Kleen return status; 10443dd98a3bSJeff Layton } 10453d72ab8fSChuck Lever 10463d72ab8fSChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 10473d72ab8fSChuck Lever nfs4_recoverydir()); 10480964a3d3SNeilBrown } 10493dd98a3bSJeff Layton 1050262a0982SChuck Lever /** 1051262a0982SChuck Lever * write_recoverydir - Set or report the pathname of the recovery directory 1052262a0982SChuck Lever * 1053262a0982SChuck Lever * Input: 1054262a0982SChuck Lever * buf: ignored 1055262a0982SChuck Lever * size: zero 1056262a0982SChuck Lever * 1057262a0982SChuck Lever * OR 1058262a0982SChuck Lever * 1059262a0982SChuck Lever * Input: 1060262a0982SChuck Lever * buf: C string containing the pathname 1061262a0982SChuck Lever * of the directory on a local file 1062262a0982SChuck Lever * system containing permanent NFSv4 1063262a0982SChuck Lever * recovery data 1064262a0982SChuck Lever * size: non-zero length of C string in @buf 1065262a0982SChuck Lever * Output: 1066262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 1067262a0982SChuck Lever * containing the current recovery pathname setting; 1068262a0982SChuck Lever * return code is the size in bytes of the string 1069262a0982SChuck Lever * On error: return code is zero or a negative errno value 1070262a0982SChuck Lever */ 10713dd98a3bSJeff Layton static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 10723dd98a3bSJeff Layton { 10733dd98a3bSJeff Layton ssize_t rv; 107411f77942SStanislav Kinsbursky struct net *net = file->f_dentry->d_sb->s_fs_info; 107511f77942SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 10763dd98a3bSJeff Layton 10773dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10789dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10793dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10803dd98a3bSJeff Layton return rv; 10813dd98a3bSJeff Layton } 10823dd98a3bSJeff Layton 10837f5ef2e9SJeff Layton /** 10847f5ef2e9SJeff Layton * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 10857f5ef2e9SJeff Layton * 10867f5ef2e9SJeff Layton * Input: 10877f5ef2e9SJeff Layton * buf: ignored 10887f5ef2e9SJeff Layton * size: zero 10897f5ef2e9SJeff Layton * OR 10907f5ef2e9SJeff Layton * 10917f5ef2e9SJeff Layton * Input: 10927f5ef2e9SJeff Layton * buf: any value 10937f5ef2e9SJeff Layton * size: non-zero length of C string in @buf 10947f5ef2e9SJeff Layton * Output: 10957f5ef2e9SJeff Layton * passed-in buffer filled with "Y" or "N" with a newline 10967f5ef2e9SJeff Layton * and NULL-terminated C string. This indicates whether 10977f5ef2e9SJeff Layton * the grace period has ended in the current net 10987f5ef2e9SJeff Layton * namespace. Return code is the size in bytes of the 10997f5ef2e9SJeff Layton * string. Writing a string that starts with 'Y', 'y', or 11007f5ef2e9SJeff Layton * '1' to the file will end the grace period for nfsd's v4 11017f5ef2e9SJeff Layton * lock manager. 11027f5ef2e9SJeff Layton */ 11037f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 11047f5ef2e9SJeff Layton { 11057f5ef2e9SJeff Layton struct net *net = file->f_dentry->d_sb->s_fs_info; 11067f5ef2e9SJeff Layton struct nfsd_net *nn = net_generic(net, nfsd_net_id); 11077f5ef2e9SJeff Layton 11087f5ef2e9SJeff Layton if (size > 0) { 11097f5ef2e9SJeff Layton switch(buf[0]) { 11107f5ef2e9SJeff Layton case 'Y': 11117f5ef2e9SJeff Layton case 'y': 11127f5ef2e9SJeff Layton case '1': 11137f5ef2e9SJeff Layton nfsd4_end_grace(nn); 11147f5ef2e9SJeff Layton break; 11157f5ef2e9SJeff Layton default: 11167f5ef2e9SJeff Layton return -EINVAL; 11177f5ef2e9SJeff Layton } 11187f5ef2e9SJeff Layton } 11197f5ef2e9SJeff Layton 11207f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 11217f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 11227f5ef2e9SJeff Layton } 11237f5ef2e9SJeff Layton 112470c3b76cSNeilBrown #endif 11250964a3d3SNeilBrown 11261da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11271da177e4SLinus Torvalds /* 11281da177e4SLinus Torvalds * populating the filesystem. 11291da177e4SLinus Torvalds */ 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 11321da177e4SLinus Torvalds { 11331da177e4SLinus Torvalds static struct tree_descr nfsd_files[] = { 113496d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 1135e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 1136e8e8753fSJ. Bruce Fields &export_features_operations, S_IRUGO}, 11374373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 11384373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 113917efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 114017efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 11411da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 11421da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1143eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 114403cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 1145a2f999a3SJeff Layton [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, 114670c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 114780212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1148596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 11495b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 1150b084f598SJ. Bruce Fields #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 1151b0b0c0a2SKevin Coffman [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, 1152b084f598SJ. Bruce Fields #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 11531da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 11541da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1155efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 11560964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 11577f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 11581da177e4SLinus Torvalds #endif 11591da177e4SLinus Torvalds /* last one */ {""} 11601da177e4SLinus Torvalds }; 116111f77942SStanislav Kinsbursky struct net *net = data; 116211f77942SStanislav Kinsbursky int ret; 116311f77942SStanislav Kinsbursky 116411f77942SStanislav Kinsbursky ret = simple_fill_super(sb, 0x6e667364, nfsd_files); 116511f77942SStanislav Kinsbursky if (ret) 116611f77942SStanislav Kinsbursky return ret; 116711f77942SStanislav Kinsbursky sb->s_fs_info = get_net(net); 116811f77942SStanislav Kinsbursky return 0; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 1171fc14f2feSAl Viro static struct dentry *nfsd_mount(struct file_system_type *fs_type, 1172fc14f2feSAl Viro int flags, const char *dev_name, void *data) 11731da177e4SLinus Torvalds { 117411f77942SStanislav Kinsbursky return mount_ns(fs_type, flags, current->nsproxy->net_ns, nfsd_fill_super); 117511f77942SStanislav Kinsbursky } 117611f77942SStanislav Kinsbursky 117711f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 117811f77942SStanislav Kinsbursky { 117911f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 118011f77942SStanislav Kinsbursky 118111f77942SStanislav Kinsbursky kill_litter_super(sb); 118211f77942SStanislav Kinsbursky put_net(net); 11831da177e4SLinus Torvalds } 11841da177e4SLinus Torvalds 11851da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 11861da177e4SLinus Torvalds .owner = THIS_MODULE, 11871da177e4SLinus Torvalds .name = "nfsd", 1188fc14f2feSAl Viro .mount = nfsd_mount, 118911f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 11901da177e4SLinus Torvalds }; 11917f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 11921da177e4SLinus Torvalds 1193e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1194e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1195e331f606SJ. Bruce Fields { 1196e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1197e331f606SJ. Bruce Fields 1198e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1199e331f606SJ. Bruce Fields if (!entry) 1200e331f606SJ. Bruce Fields return -ENOMEM; 120196d851c4SStanislav Kinsbursky entry = proc_create("exports", 0, entry, 120296d851c4SStanislav Kinsbursky &exports_proc_operations); 1203ff7c4b36Sfanchaoting if (!entry) { 1204ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1205e331f606SJ. Bruce Fields return -ENOMEM; 1206ff7c4b36Sfanchaoting } 1207e331f606SJ. Bruce Fields return 0; 1208e331f606SJ. Bruce Fields } 1209e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1210e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1211e331f606SJ. Bruce Fields { 1212e331f606SJ. Bruce Fields return 0; 1213e331f606SJ. Bruce Fields } 1214e331f606SJ. Bruce Fields #endif 1215e331f606SJ. Bruce Fields 12167ea34ac1SJeff Layton int nfsd_net_id; 12175717e012SStanislav Kinsbursky 12185717e012SStanislav Kinsbursky static __net_init int nfsd_init_net(struct net *net) 12195717e012SStanislav Kinsbursky { 12205717e012SStanislav Kinsbursky int retval; 12213d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 12225717e012SStanislav Kinsbursky 12235717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 12245717e012SStanislav Kinsbursky if (retval) 12255717e012SStanislav Kinsbursky goto out_export_error; 1226f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1227f69adb2fSStanislav Kinsbursky if (retval) 1228f69adb2fSStanislav Kinsbursky goto out_idmap_error; 12293d733711SStanislav Kinsbursky nn->nfsd4_lease = 90; /* default lease time */ 12305284b44eSStanislav Kinsbursky nn->nfsd4_grace = 90; 12315717e012SStanislav Kinsbursky return 0; 12325717e012SStanislav Kinsbursky 1233f69adb2fSStanislav Kinsbursky out_idmap_error: 1234f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 12355717e012SStanislav Kinsbursky out_export_error: 12365717e012SStanislav Kinsbursky return retval; 12375717e012SStanislav Kinsbursky } 12385717e012SStanislav Kinsbursky 12395717e012SStanislav Kinsbursky static __net_exit void nfsd_exit_net(struct net *net) 12405717e012SStanislav Kinsbursky { 1241f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 12425717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 12435717e012SStanislav Kinsbursky } 12445717e012SStanislav Kinsbursky 12457ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 12465717e012SStanislav Kinsbursky .init = nfsd_init_net, 12475717e012SStanislav Kinsbursky .exit = nfsd_exit_net, 12487ea34ac1SJeff Layton .id = &nfsd_net_id, 12497ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 12507ea34ac1SJeff Layton }; 12517ea34ac1SJeff Layton 12521da177e4SLinus Torvalds static int __init init_nfsd(void) 12531da177e4SLinus Torvalds { 12541da177e4SLinus Torvalds int retval; 12551da177e4SLinus Torvalds printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 12561da177e4SLinus Torvalds 1257797a9d79SJeff Layton retval = register_cld_notifier(); 1258813fd320SJeff Layton if (retval) 1259813fd320SJeff Layton return retval; 12607ea34ac1SJeff Layton retval = register_pernet_subsys(&nfsd_net_ops); 12617ea34ac1SJeff Layton if (retval < 0) 1262813fd320SJeff Layton goto out_unregister_notifier; 126372083396SBryan Schumaker retval = nfsd4_init_slabs(); 1264e8ff2a84SJ. Bruce Fields if (retval) 12657ea34ac1SJeff Layton goto out_unregister_pernet; 126665178db4SBryan Schumaker retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ 126765178db4SBryan Schumaker if (retval) 126865178db4SBryan Schumaker goto out_free_slabs; 12691da177e4SLinus Torvalds nfsd_stat_init(); /* Statistics */ 1270d5c3428bSJ. Bruce Fields retval = nfsd_reply_cache_init(); 1271d5c3428bSJ. Bruce Fields if (retval) 1272d5c3428bSJ. Bruce Fields goto out_free_stat; 12731da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1274e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1275e331f606SJ. Bruce Fields if (retval) 1276f69adb2fSStanislav Kinsbursky goto out_free_lockd; 12771da177e4SLinus Torvalds retval = register_filesystem(&nfsd_fs_type); 127826808d3fSJ. Bruce Fields if (retval) 127926808d3fSJ. Bruce Fields goto out_free_all; 128026808d3fSJ. Bruce Fields return 0; 128126808d3fSJ. Bruce Fields out_free_all: 12821da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 12831da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1284dbf847ecSJ. Bruce Fields out_free_lockd: 12851da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1286e331f606SJ. Bruce Fields nfsd_reply_cache_shutdown(); 1287d5c3428bSJ. Bruce Fields out_free_stat: 1288d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 128965178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 129065178db4SBryan Schumaker out_free_slabs: 129146b25895SJ. Bruce Fields nfsd4_free_slabs(); 12927ea34ac1SJeff Layton out_unregister_pernet: 12937ea34ac1SJeff Layton unregister_pernet_subsys(&nfsd_net_ops); 1294813fd320SJeff Layton out_unregister_notifier: 1295797a9d79SJeff Layton unregister_cld_notifier(); 12961da177e4SLinus Torvalds return retval; 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds static void __exit exit_nfsd(void) 13001da177e4SLinus Torvalds { 1301d5c3428bSJ. Bruce Fields nfsd_reply_cache_shutdown(); 13021da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 13031da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 13041da177e4SLinus Torvalds nfsd_stat_shutdown(); 13051da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1306e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 130765178db4SBryan Schumaker nfsd_fault_inject_cleanup(); 13081da177e4SLinus Torvalds unregister_filesystem(&nfsd_fs_type); 13097ea34ac1SJeff Layton unregister_pernet_subsys(&nfsd_net_ops); 1310797a9d79SJeff Layton unregister_cld_notifier(); 13111da177e4SLinus Torvalds } 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 13141da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 13151da177e4SLinus Torvalds module_init(init_nfsd) 13161da177e4SLinus Torvalds module_exit(exit_nfsd) 1317