109c434b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Syscall interface to knfsd. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 61da177e4SLinus Torvalds */ 71da177e4SLinus Torvalds 85a0e3ad6STejun Heo #include <linux/slab.h> 93f8206d4SAl Viro #include <linux/namei.h> 10b41b66d6SNeilBrown #include <linux/ctype.h> 1196a374a3SDavid Howells #include <linux/fs_context.h> 121da177e4SLinus Torvalds 1380212d59SNeilBrown #include <linux/sunrpc/svcsock.h> 144373ea84SWendy Cheng #include <linux/lockd/lockd.h> 155976687aSJeff Layton #include <linux/sunrpc/addr.h> 16b0b0c0a2SKevin Coffman #include <linux/sunrpc/gss_api.h> 17813fd320SJeff Layton #include <linux/sunrpc/rpc_pipe_fs.h> 18143cb494SPaul Gortmaker #include <linux/module.h> 19e8a79fb1SJ. Bruce Fields #include <linux/fsnotify.h> 201da177e4SLinus Torvalds 212ca72e17SJ. Bruce Fields #include "idmap.h" 229a74af21SBoaz Harrosh #include "nfsd.h" 239a74af21SBoaz Harrosh #include "cache.h" 24f3c7521fSBryan Schumaker #include "state.h" 257ea34ac1SJeff Layton #include "netns.h" 269cf514ccSChristoph Hellwig #include "pnfs.h" 272e6c6e4cSChuck Lever #include "filecache.h" 2839d432fcSChuck Lever #include "trace.h" 2913727f85SLorenzo Bianconi #include "netlink.h" 309a74af21SBoaz Harrosh 311da177e4SLinus Torvalds /* 32b0b0c0a2SKevin Coffman * We have a single directory with several nodes in it. 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds enum { 351da177e4SLinus Torvalds NFSD_Root = 1, 361da177e4SLinus Torvalds NFSD_List, 3720ad856eSAmir Goldstein NFSD_Export_Stats, 38e8e8753fSJ. Bruce Fields NFSD_Export_features, 391da177e4SLinus Torvalds NFSD_Fh, 404373ea84SWendy Cheng NFSD_FO_UnlockIP, 4117efa372SWendy Cheng NFSD_FO_UnlockFS, 421da177e4SLinus Torvalds NFSD_Threads, 43eed2965aSGreg Banks NFSD_Pool_Threads, 4403cf6c9fSGreg Banks NFSD_Pool_Stats, 45a2f999a3SJeff Layton NFSD_Reply_Cache_Stats, 4670c3b76cSNeilBrown NFSD_Versions, 4780212d59SNeilBrown NFSD_Ports, 48596bbe53SNeilBrown NFSD_MaxBlkSize, 495b8db00bSJeff Layton NFSD_MaxConnections, 502e6c6e4cSChuck Lever NFSD_Filecache, 5170c3b76cSNeilBrown /* 5270c3b76cSNeilBrown * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 5370c3b76cSNeilBrown * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 5470c3b76cSNeilBrown */ 5570c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 561da177e4SLinus Torvalds NFSD_Leasetime, 57efc4bb4fSJ. Bruce Fields NFSD_Gracetime, 580964a3d3SNeilBrown NFSD_RecoveryDir, 597f5ef2e9SJeff Layton NFSD_V4EndGrace, 6070c3b76cSNeilBrown #endif 61e8a79fb1SJ. Bruce Fields NFSD_MaxReserved 621da177e4SLinus Torvalds }; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds /* 651da177e4SLinus Torvalds * write() for these nodes. 661da177e4SLinus Torvalds */ 671da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 68b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 69b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 701da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size); 71eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 7270c3b76cSNeilBrown static ssize_t write_versions(struct file *file, char *buf, size_t size); 7380212d59SNeilBrown static ssize_t write_ports(struct file *file, char *buf, size_t size); 74596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 755b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size); 7670c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 771da177e4SLinus Torvalds static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 78efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 7974fd4873SJeff Layton #ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING 800964a3d3SNeilBrown static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 8174fd4873SJeff Layton #endif 827f5ef2e9SJeff Layton static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 8370c3b76cSNeilBrown #endif 841da177e4SLinus Torvalds 85c2cdc2abSEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 861da177e4SLinus Torvalds [NFSD_Fh] = write_filehandle, 87b046ccdcSChuck Lever [NFSD_FO_UnlockIP] = write_unlock_ip, 88b046ccdcSChuck Lever [NFSD_FO_UnlockFS] = write_unlock_fs, 891da177e4SLinus Torvalds [NFSD_Threads] = write_threads, 90eed2965aSGreg Banks [NFSD_Pool_Threads] = write_pool_threads, 9170c3b76cSNeilBrown [NFSD_Versions] = write_versions, 9280212d59SNeilBrown [NFSD_Ports] = write_ports, 93596bbe53SNeilBrown [NFSD_MaxBlkSize] = write_maxblksize, 945b8db00bSJeff Layton [NFSD_MaxConnections] = write_maxconn, 9570c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 961da177e4SLinus Torvalds [NFSD_Leasetime] = write_leasetime, 97efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = write_gracetime, 9874fd4873SJeff Layton #ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING 990964a3d3SNeilBrown [NFSD_RecoveryDir] = write_recoverydir, 10074fd4873SJeff Layton #endif 1017f5ef2e9SJeff Layton [NFSD_V4EndGrace] = write_v4_end_grace, 10270c3b76cSNeilBrown #endif 1031da177e4SLinus Torvalds }; 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 1061da177e4SLinus Torvalds { 107496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 1081da177e4SLinus Torvalds char *data; 1091da177e4SLinus Torvalds ssize_t rv; 1101da177e4SLinus Torvalds 111e8c96f8cSTobias Klauser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 1121da177e4SLinus Torvalds return -EINVAL; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 1151da177e4SLinus Torvalds if (IS_ERR(data)) 1161da177e4SLinus Torvalds return PTR_ERR(data); 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 1193434d7aaSChuck Lever if (rv < 0) 1201da177e4SLinus Torvalds return rv; 1213434d7aaSChuck Lever 1223434d7aaSChuck Lever simple_transaction_set(file, rv); 1233434d7aaSChuck Lever return size; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1267390022dSNeilBrown static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 1277390022dSNeilBrown { 1287390022dSNeilBrown if (! file->private_data) { 1297390022dSNeilBrown /* An attempt to read a transaction file without writing 1307390022dSNeilBrown * causes a 0-byte write so that the file can return 1317390022dSNeilBrown * state information 1327390022dSNeilBrown */ 1337390022dSNeilBrown ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 1347390022dSNeilBrown if (rv < 0) 1357390022dSNeilBrown return rv; 1367390022dSNeilBrown } 1377390022dSNeilBrown return simple_transaction_read(file, buf, size, pos); 1387390022dSNeilBrown } 1397390022dSNeilBrown 1404b6f5d20SArjan van de Ven static const struct file_operations transaction_ops = { 1411da177e4SLinus Torvalds .write = nfsctl_transaction_write, 1427390022dSNeilBrown .read = nfsctl_transaction_read, 1431da177e4SLinus Torvalds .release = simple_transaction_release, 1446038f373SArnd Bergmann .llseek = default_llseek, 1451da177e4SLinus Torvalds }; 1461da177e4SLinus Torvalds 14796d851c4SStanislav Kinsbursky static int exports_net_open(struct net *net, struct file *file) 1481da177e4SLinus Torvalds { 149f2c7ea10SStanislav Kinsbursky int err; 150f2c7ea10SStanislav Kinsbursky struct seq_file *seq; 15196d851c4SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 152f2c7ea10SStanislav Kinsbursky 153f2c7ea10SStanislav Kinsbursky err = seq_open(file, &nfs_exports_op); 154f2c7ea10SStanislav Kinsbursky if (err) 155f2c7ea10SStanislav Kinsbursky return err; 156f2c7ea10SStanislav Kinsbursky 157f2c7ea10SStanislav Kinsbursky seq = file->private_data; 158e5f06f72SStanislav Kinsbursky seq->private = nn->svc_export_cache; 159f2c7ea10SStanislav Kinsbursky return 0; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 16296d851c4SStanislav Kinsbursky static int exports_nfsd_open(struct inode *inode, struct file *file) 16396d851c4SStanislav Kinsbursky { 16496d851c4SStanislav Kinsbursky return exports_net_open(inode->i_sb->s_fs_info, file); 16596d851c4SStanislav Kinsbursky } 16696d851c4SStanislav Kinsbursky 16796d851c4SStanislav Kinsbursky static const struct file_operations exports_nfsd_operations = { 16896d851c4SStanislav Kinsbursky .open = exports_nfsd_open, 1691da177e4SLinus Torvalds .read = seq_read, 1701da177e4SLinus Torvalds .llseek = seq_lseek, 1711da177e4SLinus Torvalds .release = seq_release, 1721da177e4SLinus Torvalds }; 1731da177e4SLinus Torvalds 174e8e8753fSJ. Bruce Fields static int export_features_show(struct seq_file *m, void *v) 175e8e8753fSJ. Bruce Fields { 176e8e8753fSJ. Bruce Fields seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 177e8e8753fSJ. Bruce Fields return 0; 178e8e8753fSJ. Bruce Fields } 179e8e8753fSJ. Bruce Fields 1809beeaab8SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(export_features); 181e8e8753fSJ. Bruce Fields 182828c0950SAlexey Dobriyan static const struct file_operations pool_stats_operations = { 18303cf6c9fSGreg Banks .open = nfsd_pool_stats_open, 18403cf6c9fSGreg Banks .read = seq_read, 18503cf6c9fSGreg Banks .llseek = seq_lseek, 1867b207ccdSNeilBrown .release = seq_release, 18703cf6c9fSGreg Banks }; 18803cf6c9fSGreg Banks 18964776611SChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); 190a2f999a3SJeff Layton 1911342f9ddSChenXiaoSong DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats); 1922e6c6e4cSChuck Lever 1931da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 1941da177e4SLinus Torvalds /* 1951da177e4SLinus Torvalds * payload - write methods 1961da177e4SLinus Torvalds */ 1971da177e4SLinus Torvalds 198244c7d44SAl Viro static inline struct net *netns(struct file *file) 199244c7d44SAl Viro { 200244c7d44SAl Viro return file_inode(file)->i_sb->s_fs_info; 201244c7d44SAl Viro } 2021da177e4SLinus Torvalds 203f2453978SChuck Lever /* 204262a0982SChuck Lever * write_unlock_ip - Release all locks used by a client 205262a0982SChuck Lever * 206262a0982SChuck Lever * Experimental. 207262a0982SChuck Lever * 208262a0982SChuck Lever * Input: 209262a0982SChuck Lever * buf: '\n'-terminated C string containing a 2104116092bSChuck Lever * presentation format IP address 211262a0982SChuck Lever * size: length of C string in @buf 212262a0982SChuck Lever * Output: 213262a0982SChuck Lever * On success: returns zero if all specified locks were released; 214262a0982SChuck Lever * returns one if one or more locks were not released 215262a0982SChuck Lever * On error: return code is negative errno value 216262a0982SChuck Lever */ 217b046ccdcSChuck Lever static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 2184373ea84SWendy Cheng { 2194116092bSChuck Lever struct sockaddr_storage address; 2204116092bSChuck Lever struct sockaddr *sap = (struct sockaddr *)&address; 2214116092bSChuck Lever size_t salen = sizeof(address); 222367c8c7bSChuck Lever char *fo_path; 223244c7d44SAl Viro struct net *net = netns(file); 2244373ea84SWendy Cheng 2254373ea84SWendy Cheng /* sanity check */ 2264373ea84SWendy Cheng if (size == 0) 2274373ea84SWendy Cheng return -EINVAL; 2284373ea84SWendy Cheng 2294373ea84SWendy Cheng if (buf[size-1] != '\n') 2304373ea84SWendy Cheng return -EINVAL; 2314373ea84SWendy Cheng 2324373ea84SWendy Cheng fo_path = buf; 2334373ea84SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 2344373ea84SWendy Cheng return -EINVAL; 2354373ea84SWendy Cheng 23611f77942SStanislav Kinsbursky if (rpc_pton(net, fo_path, size, sap, salen) == 0) 2374373ea84SWendy Cheng return -EINVAL; 2384373ea84SWendy Cheng 23939d432fcSChuck Lever trace_nfsd_ctl_unlock_ip(net, buf); 2404116092bSChuck Lever return nlmsvc_unlock_all_by_ip(sap); 2414373ea84SWendy Cheng } 2424373ea84SWendy Cheng 243f2453978SChuck Lever /* 244262a0982SChuck Lever * write_unlock_fs - Release all locks on a local file system 245262a0982SChuck Lever * 246262a0982SChuck Lever * Experimental. 247262a0982SChuck Lever * 248262a0982SChuck Lever * Input: 249262a0982SChuck Lever * buf: '\n'-terminated C string containing the 250262a0982SChuck Lever * absolute pathname of a local file system 251262a0982SChuck Lever * size: length of C string in @buf 252262a0982SChuck Lever * Output: 253262a0982SChuck Lever * On success: returns zero if all specified locks were released; 254262a0982SChuck Lever * returns one if one or more locks were not released 255262a0982SChuck Lever * On error: return code is negative errno value 256262a0982SChuck Lever */ 257b046ccdcSChuck Lever static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 25817efa372SWendy Cheng { 259a63bb996SAl Viro struct path path; 26017efa372SWendy Cheng char *fo_path; 26117efa372SWendy Cheng int error; 26217efa372SWendy Cheng 26317efa372SWendy Cheng /* sanity check */ 26417efa372SWendy Cheng if (size == 0) 26517efa372SWendy Cheng return -EINVAL; 26617efa372SWendy Cheng 26717efa372SWendy Cheng if (buf[size-1] != '\n') 26817efa372SWendy Cheng return -EINVAL; 26917efa372SWendy Cheng 27017efa372SWendy Cheng fo_path = buf; 27117efa372SWendy Cheng if (qword_get(&buf, fo_path, size) < 0) 27217efa372SWendy Cheng return -EINVAL; 27339d432fcSChuck Lever trace_nfsd_ctl_unlock_fs(netns(file), fo_path); 274a63bb996SAl Viro error = kern_path(fo_path, 0, &path); 27517efa372SWendy Cheng if (error) 27617efa372SWendy Cheng return error; 27717efa372SWendy Cheng 278262a0982SChuck Lever /* 279262a0982SChuck Lever * XXX: Needs better sanity checking. Otherwise we could end up 280262a0982SChuck Lever * releasing locks on the wrong file system. 281262a0982SChuck Lever * 282262a0982SChuck Lever * For example: 283262a0982SChuck Lever * 1. Does the path refer to a directory? 284262a0982SChuck Lever * 2. Is that directory a mount point, or 285262a0982SChuck Lever * 3. Is that directory the root of an exported file system? 286262a0982SChuck Lever */ 287d8c9584eSAl Viro error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 28817efa372SWendy Cheng 289a63bb996SAl Viro path_put(&path); 29017efa372SWendy Cheng return error; 29117efa372SWendy Cheng } 29217efa372SWendy Cheng 293f2453978SChuck Lever /* 294262a0982SChuck Lever * write_filehandle - Get a variable-length NFS file handle by path 295262a0982SChuck Lever * 296262a0982SChuck Lever * On input, the buffer contains a '\n'-terminated C string comprised of 297262a0982SChuck Lever * three alphanumeric words separated by whitespace. The string may 298262a0982SChuck Lever * contain escape sequences. 299262a0982SChuck Lever * 300262a0982SChuck Lever * Input: 301262a0982SChuck Lever * buf: 302262a0982SChuck Lever * domain: client domain name 303262a0982SChuck Lever * path: export pathname 304262a0982SChuck Lever * maxsize: numeric maximum size of 305262a0982SChuck Lever * @buf 306262a0982SChuck Lever * size: length of C string in @buf 307262a0982SChuck Lever * Output: 308262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 309262a0982SChuck Lever * string containing a ASCII hex text version 310262a0982SChuck Lever * of the NFS file handle; 311262a0982SChuck Lever * return code is the size in bytes of the string 312262a0982SChuck Lever * On error: return code is negative errno value 313262a0982SChuck Lever */ 3141da177e4SLinus Torvalds static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds char *dname, *path; 3173f649ab7SKees Cook int maxsize; 3181da177e4SLinus Torvalds char *mesg = buf; 3191da177e4SLinus Torvalds int len; 3201da177e4SLinus Torvalds struct auth_domain *dom; 3211da177e4SLinus Torvalds struct knfsd_fh fh; 3221da177e4SLinus Torvalds 32387d26ea7SJ. Bruce Fields if (size == 0) 32487d26ea7SJ. Bruce Fields return -EINVAL; 32587d26ea7SJ. Bruce Fields 3261da177e4SLinus Torvalds if (buf[size-1] != '\n') 3271da177e4SLinus Torvalds return -EINVAL; 3281da177e4SLinus Torvalds buf[size-1] = 0; 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds dname = mesg; 3311da177e4SLinus Torvalds len = qword_get(&mesg, dname, size); 33254224f04SChuck Lever if (len <= 0) 33354224f04SChuck Lever return -EINVAL; 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds path = dname+len+1; 3361da177e4SLinus Torvalds len = qword_get(&mesg, path, size); 33754224f04SChuck Lever if (len <= 0) 33854224f04SChuck Lever return -EINVAL; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds len = get_int(&mesg, &maxsize); 3411da177e4SLinus Torvalds if (len) 3421da177e4SLinus Torvalds return len; 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds if (maxsize < NFS_FHSIZE) 3451da177e4SLinus Torvalds return -EINVAL; 3463c7aa15dSKinglong Mee maxsize = min(maxsize, NFS3_FHSIZE); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds if (qword_get(&mesg, mesg, size) > 0) 3491da177e4SLinus Torvalds return -EINVAL; 3501da177e4SLinus Torvalds 35139d432fcSChuck Lever trace_nfsd_ctl_filehandle(netns(file), dname, path, maxsize); 35239d432fcSChuck Lever 3531da177e4SLinus Torvalds /* we have all the words, they are in buf.. */ 3541da177e4SLinus Torvalds dom = unix_domain_find(dname); 3551da177e4SLinus Torvalds if (!dom) 3561da177e4SLinus Torvalds return -ENOMEM; 3571da177e4SLinus Torvalds 358244c7d44SAl Viro len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 3591da177e4SLinus Torvalds auth_domain_put(dom); 3601da177e4SLinus Torvalds if (len) 3611da177e4SLinus Torvalds return len; 3621da177e4SLinus Torvalds 36354224f04SChuck Lever mesg = buf; 36454224f04SChuck Lever len = SIMPLE_TRANSACTION_LIMIT; 365d8b26071SNeilBrown qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size); 3661da177e4SLinus Torvalds mesg[-1] = '\n'; 3671da177e4SLinus Torvalds return mesg - buf; 3681da177e4SLinus Torvalds } 3691da177e4SLinus Torvalds 370f2453978SChuck Lever /* 371262a0982SChuck Lever * write_threads - Start NFSD, or report the current number of running threads 372262a0982SChuck Lever * 373262a0982SChuck Lever * Input: 374262a0982SChuck Lever * buf: ignored 375262a0982SChuck Lever * size: zero 376262a0982SChuck Lever * Output: 377262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 378262a0982SChuck Lever * string numeric value representing the number of 379262a0982SChuck Lever * running NFSD threads; 380262a0982SChuck Lever * return code is the size in bytes of the string 381262a0982SChuck Lever * On error: return code is zero 382262a0982SChuck Lever * 383262a0982SChuck Lever * OR 384262a0982SChuck Lever * 385262a0982SChuck Lever * Input: 386262a0982SChuck Lever * buf: C string containing an unsigned 387262a0982SChuck Lever * integer value representing the 388262a0982SChuck Lever * number of NFSD threads to start 389262a0982SChuck Lever * size: non-zero length of C string in @buf 390262a0982SChuck Lever * Output: 391262a0982SChuck Lever * On success: NFS service is started; 392262a0982SChuck Lever * passed-in buffer filled with '\n'-terminated C 393262a0982SChuck Lever * string numeric value representing the number of 394262a0982SChuck Lever * running NFSD threads; 395262a0982SChuck Lever * return code is the size in bytes of the string 396262a0982SChuck Lever * On error: return code is zero or a negative errno value 397262a0982SChuck Lever */ 3981da177e4SLinus Torvalds static ssize_t write_threads(struct file *file, char *buf, size_t size) 3991da177e4SLinus Torvalds { 4001da177e4SLinus Torvalds char *mesg = buf; 4011da177e4SLinus Torvalds int rv; 402244c7d44SAl Viro struct net *net = netns(file); 403d41a9417SStanislav Kinsbursky 4041da177e4SLinus Torvalds if (size > 0) { 4051da177e4SLinus Torvalds int newthreads; 4061da177e4SLinus Torvalds rv = get_int(&mesg, &newthreads); 4071da177e4SLinus Torvalds if (rv) 4081da177e4SLinus Torvalds return rv; 4091da177e4SLinus Torvalds if (newthreads < 0) 4101da177e4SLinus Torvalds return -EINVAL; 41139d432fcSChuck Lever trace_nfsd_ctl_threads(net, newthreads); 4124df493a2STrond Myklebust rv = nfsd_svc(newthreads, net, file->f_cred); 41382e12fe9SNeilBrown if (rv < 0) 4141da177e4SLinus Torvalds return rv; 41582e12fe9SNeilBrown } else 4169dd9845fSStanislav Kinsbursky rv = nfsd_nrthreads(net); 417e06b6405SChuck Lever 41882e12fe9SNeilBrown return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds 421f2453978SChuck Lever /* 422262a0982SChuck Lever * write_pool_threads - Set or report the current number of threads per pool 423262a0982SChuck Lever * 424262a0982SChuck Lever * Input: 425262a0982SChuck Lever * buf: ignored 426262a0982SChuck Lever * size: zero 427262a0982SChuck Lever * 428262a0982SChuck Lever * OR 429262a0982SChuck Lever * 430262a0982SChuck Lever * Input: 431262a0982SChuck Lever * buf: C string containing whitespace- 432262a0982SChuck Lever * separated unsigned integer values 433262a0982SChuck Lever * representing the number of NFSD 434262a0982SChuck Lever * threads to start in each pool 435262a0982SChuck Lever * size: non-zero length of C string in @buf 436262a0982SChuck Lever * Output: 437262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 438262a0982SChuck Lever * string containing integer values representing the 439262a0982SChuck Lever * number of NFSD threads in each pool; 440262a0982SChuck Lever * return code is the size in bytes of the string 441262a0982SChuck Lever * On error: return code is zero or a negative errno value 442262a0982SChuck Lever */ 443eed2965aSGreg Banks static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 444eed2965aSGreg Banks { 445eed2965aSGreg Banks /* if size > 0, look for an array of number of threads per node 446eed2965aSGreg Banks * and apply them then write out number of threads per node as reply 447eed2965aSGreg Banks */ 448eed2965aSGreg Banks char *mesg = buf; 449eed2965aSGreg Banks int i; 450eed2965aSGreg Banks int rv; 451eed2965aSGreg Banks int len; 452bedbdd8bSNeil Brown int npools; 453eed2965aSGreg Banks int *nthreads; 454244c7d44SAl Viro struct net *net = netns(file); 455eed2965aSGreg Banks 456bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 4579dd9845fSStanislav Kinsbursky npools = nfsd_nrpools(net); 458eed2965aSGreg Banks if (npools == 0) { 459eed2965aSGreg Banks /* 460eed2965aSGreg Banks * NFS is shut down. The admin can start it by 461eed2965aSGreg Banks * writing to the threads file but NOT the pool_threads 462eed2965aSGreg Banks * file, sorry. Report zero threads. 463eed2965aSGreg Banks */ 464bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 465eed2965aSGreg Banks strcpy(buf, "0\n"); 466eed2965aSGreg Banks return strlen(buf); 467eed2965aSGreg Banks } 468eed2965aSGreg Banks 469eed2965aSGreg Banks nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 470bedbdd8bSNeil Brown rv = -ENOMEM; 471eed2965aSGreg Banks if (nthreads == NULL) 472bedbdd8bSNeil Brown goto out_free; 473eed2965aSGreg Banks 474eed2965aSGreg Banks if (size > 0) { 475eed2965aSGreg Banks for (i = 0; i < npools; i++) { 476eed2965aSGreg Banks rv = get_int(&mesg, &nthreads[i]); 477eed2965aSGreg Banks if (rv == -ENOENT) 478eed2965aSGreg Banks break; /* fewer numbers than pools */ 479eed2965aSGreg Banks if (rv) 480eed2965aSGreg Banks goto out_free; /* syntax error */ 481eed2965aSGreg Banks rv = -EINVAL; 482eed2965aSGreg Banks if (nthreads[i] < 0) 483eed2965aSGreg Banks goto out_free; 48439d432fcSChuck Lever trace_nfsd_ctl_pool_threads(net, i, nthreads[i]); 485eed2965aSGreg Banks } 4863938a0d5SStanislav Kinsbursky rv = nfsd_set_nrthreads(i, nthreads, net); 487eed2965aSGreg Banks if (rv) 488eed2965aSGreg Banks goto out_free; 489eed2965aSGreg Banks } 490eed2965aSGreg Banks 4919dd9845fSStanislav Kinsbursky rv = nfsd_get_nrthreads(npools, nthreads, net); 492eed2965aSGreg Banks if (rv) 493eed2965aSGreg Banks goto out_free; 494eed2965aSGreg Banks 495eed2965aSGreg Banks mesg = buf; 496eed2965aSGreg Banks size = SIMPLE_TRANSACTION_LIMIT; 497eed2965aSGreg Banks for (i = 0; i < npools && size > 0; i++) { 498eed2965aSGreg Banks snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 499eed2965aSGreg Banks len = strlen(mesg); 500eed2965aSGreg Banks size -= len; 501eed2965aSGreg Banks mesg += len; 502eed2965aSGreg Banks } 503413d63d7SJ. Bruce Fields rv = mesg - buf; 504eed2965aSGreg Banks out_free: 505eed2965aSGreg Banks kfree(nthreads); 506bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 507eed2965aSGreg Banks return rv; 508eed2965aSGreg Banks } 509eed2965aSGreg Banks 510ff7d1179STrond Myklebust static ssize_t 511e333f3bbSTrond Myklebust nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 512e333f3bbSTrond Myklebust const char *sep, unsigned vers, int minor) 513ff7d1179STrond Myklebust { 514abcb4dacSNeilBrown const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 515e333f3bbSTrond Myklebust bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 516ff7d1179STrond Myklebust 517abcb4dacSNeilBrown if (vers == 4 && minor >= 0 && 518e333f3bbSTrond Myklebust !nfsd_minorversion(nn, minor, NFSD_TEST)) 519ff7d1179STrond Myklebust supported = false; 520abcb4dacSNeilBrown if (minor == 0 && supported) 521abcb4dacSNeilBrown /* 522abcb4dacSNeilBrown * special case for backward compatability. 523abcb4dacSNeilBrown * +4.0 is never reported, it is implied by 524abcb4dacSNeilBrown * +4, unless -4.0 is present. 525abcb4dacSNeilBrown */ 526abcb4dacSNeilBrown return 0; 527ff7d1179STrond Myklebust return snprintf(buf, remaining, format, sep, 528ff7d1179STrond Myklebust supported ? '+' : '-', vers, minor); 529ff7d1179STrond Myklebust } 530ff7d1179STrond Myklebust 5313dd98a3bSJeff Layton static ssize_t __write_versions(struct file *file, char *buf, size_t size) 53270c3b76cSNeilBrown { 53370c3b76cSNeilBrown char *mesg = buf; 5348daf220aSBenny Halevy char *vers, *minorp, sign; 535261758b5SChuck Lever int len, num, remaining; 53670c3b76cSNeilBrown ssize_t tlen = 0; 53770c3b76cSNeilBrown char *sep; 538244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 53970c3b76cSNeilBrown 54070c3b76cSNeilBrown if (size > 0) { 5419dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 5426658d3a7SNeilBrown /* Cannot change versions without updating 5439dd9845fSStanislav Kinsbursky * nn->nfsd_serv->sv_xdrsize, and reallocing 5446658d3a7SNeilBrown * rq_argp and rq_resp 5456658d3a7SNeilBrown */ 54670c3b76cSNeilBrown return -EBUSY; 54770c3b76cSNeilBrown if (buf[size-1] != '\n') 54870c3b76cSNeilBrown return -EINVAL; 54970c3b76cSNeilBrown buf[size-1] = 0; 55039d432fcSChuck Lever trace_nfsd_ctl_version(netns(file), buf); 55170c3b76cSNeilBrown 55270c3b76cSNeilBrown vers = mesg; 55370c3b76cSNeilBrown len = qword_get(&mesg, vers, size); 55470c3b76cSNeilBrown if (len <= 0) return -EINVAL; 55570c3b76cSNeilBrown do { 556d3635ff0STrond Myklebust enum vers_op cmd; 557abcb4dacSNeilBrown unsigned minor; 55870c3b76cSNeilBrown sign = *vers; 55970c3b76cSNeilBrown if (sign == '+' || sign == '-') 5608daf220aSBenny Halevy num = simple_strtol((vers+1), &minorp, 0); 56170c3b76cSNeilBrown else 5628daf220aSBenny Halevy num = simple_strtol(vers, &minorp, 0); 5638daf220aSBenny Halevy if (*minorp == '.') { 564ff89be87SJ. Bruce Fields if (num != 4) 5658daf220aSBenny Halevy return -EINVAL; 566e35659f1SNeilBrown if (kstrtouint(minorp+1, 0, &minor) < 0) 5678daf220aSBenny Halevy return -EINVAL; 568abcb4dacSNeilBrown } 569abcb4dacSNeilBrown 570d3635ff0STrond Myklebust cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 57170c3b76cSNeilBrown switch(num) { 5722f3a4b2aSJeff Layton #ifdef CONFIG_NFSD_V2 57370c3b76cSNeilBrown case 2: 5742f3a4b2aSJeff Layton #endif 57570c3b76cSNeilBrown case 3: 576e333f3bbSTrond Myklebust nfsd_vers(nn, num, cmd); 577d3635ff0STrond Myklebust break; 57870c3b76cSNeilBrown case 4: 579abcb4dacSNeilBrown if (*minorp == '.') { 580e333f3bbSTrond Myklebust if (nfsd_minorversion(nn, minor, cmd) < 0) 581abcb4dacSNeilBrown return -EINVAL; 582e333f3bbSTrond Myklebust } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 583abcb4dacSNeilBrown /* 584abcb4dacSNeilBrown * Either we have +4 and no minors are enabled, 585abcb4dacSNeilBrown * or we have -4 and at least one minor is enabled. 586abcb4dacSNeilBrown * In either case, propagate 'cmd' to all minors. 587abcb4dacSNeilBrown */ 588abcb4dacSNeilBrown minor = 0; 589e333f3bbSTrond Myklebust while (nfsd_minorversion(nn, minor, cmd) >= 0) 590abcb4dacSNeilBrown minor++; 591abcb4dacSNeilBrown } 59270c3b76cSNeilBrown break; 59370c3b76cSNeilBrown default: 5948e823bafSJeff Layton /* Ignore requests to disable non-existent versions */ 5958e823bafSJeff Layton if (cmd == NFSD_SET) 59670c3b76cSNeilBrown return -EINVAL; 59770c3b76cSNeilBrown } 59870c3b76cSNeilBrown vers += len + 1; 59970c3b76cSNeilBrown } while ((len = qword_get(&mesg, vers, size)) > 0); 60070c3b76cSNeilBrown /* If all get turned off, turn them back on, as 60170c3b76cSNeilBrown * having no versions is BAD 60270c3b76cSNeilBrown */ 603e333f3bbSTrond Myklebust nfsd_reset_versions(nn); 60470c3b76cSNeilBrown } 605261758b5SChuck Lever 60670c3b76cSNeilBrown /* Now write current state into reply buffer */ 60770c3b76cSNeilBrown sep = ""; 608261758b5SChuck Lever remaining = SIMPLE_TRANSACTION_LIMIT; 609ff7d1179STrond Myklebust for (num=2 ; num <= 4 ; num++) { 610abcb4dacSNeilBrown int minor; 611e333f3bbSTrond Myklebust if (!nfsd_vers(nn, num, NFSD_AVAIL)) 612e35659f1SNeilBrown continue; 613abcb4dacSNeilBrown 614abcb4dacSNeilBrown minor = -1; 615ff7d1179STrond Myklebust do { 616e333f3bbSTrond Myklebust len = nfsd_print_version_support(nn, buf, remaining, 617ff7d1179STrond Myklebust sep, num, minor); 618818f2f57SDan Carpenter if (len >= remaining) 619ff7d1179STrond Myklebust goto out; 620261758b5SChuck Lever remaining -= len; 621261758b5SChuck Lever buf += len; 622261758b5SChuck Lever tlen += len; 623ff7d1179STrond Myklebust minor++; 624abcb4dacSNeilBrown if (len) 625ff7d1179STrond Myklebust sep = " "; 626ff7d1179STrond Myklebust } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 627261758b5SChuck Lever } 628ff7d1179STrond Myklebust out: 629261758b5SChuck Lever len = snprintf(buf, remaining, "\n"); 630818f2f57SDan Carpenter if (len >= remaining) 631261758b5SChuck Lever return -EINVAL; 632261758b5SChuck Lever return tlen + len; 63370c3b76cSNeilBrown } 63470c3b76cSNeilBrown 635f2453978SChuck Lever /* 636262a0982SChuck Lever * write_versions - Set or report the available NFS protocol versions 637262a0982SChuck Lever * 638262a0982SChuck Lever * Input: 639262a0982SChuck Lever * buf: ignored 640262a0982SChuck Lever * size: zero 641262a0982SChuck Lever * Output: 642262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C 643262a0982SChuck Lever * string containing positive or negative integer 644262a0982SChuck Lever * values representing the current status of each 645262a0982SChuck Lever * protocol version; 646262a0982SChuck Lever * return code is the size in bytes of the string 647262a0982SChuck Lever * On error: return code is zero or a negative errno value 648262a0982SChuck Lever * 649262a0982SChuck Lever * OR 650262a0982SChuck Lever * 651262a0982SChuck Lever * Input: 652262a0982SChuck Lever * buf: C string containing whitespace- 653262a0982SChuck Lever * separated positive or negative 654262a0982SChuck Lever * integer values representing NFS 655262a0982SChuck Lever * protocol versions to enable ("+n") 656262a0982SChuck Lever * or disable ("-n") 657262a0982SChuck Lever * size: non-zero length of C string in @buf 658262a0982SChuck Lever * Output: 659262a0982SChuck Lever * On success: status of zero or more protocol versions has 660262a0982SChuck Lever * been updated; passed-in buffer filled with 661262a0982SChuck Lever * '\n'-terminated C string containing positive 662262a0982SChuck Lever * or negative integer values representing the 663262a0982SChuck Lever * current status of each protocol version; 664262a0982SChuck Lever * return code is the size in bytes of the string 665262a0982SChuck Lever * On error: return code is zero or a negative errno value 666262a0982SChuck Lever */ 6673dd98a3bSJeff Layton static ssize_t write_versions(struct file *file, char *buf, size_t size) 6683dd98a3bSJeff Layton { 6693dd98a3bSJeff Layton ssize_t rv; 6703dd98a3bSJeff Layton 6713dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 6723dd98a3bSJeff Layton rv = __write_versions(file, buf, size); 6733dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 6743dd98a3bSJeff Layton return rv; 6753dd98a3bSJeff Layton } 6763dd98a3bSJeff Layton 6774cd5dc75SChuck Lever /* 6780a5372d8SChuck Lever * Zero-length write. Return a list of NFSD's current listener 6790a5372d8SChuck Lever * transports. 6800a5372d8SChuck Lever */ 6819dd9845fSStanislav Kinsbursky static ssize_t __write_ports_names(char *buf, struct net *net) 6820a5372d8SChuck Lever { 6839dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 6849dd9845fSStanislav Kinsbursky 6859dd9845fSStanislav Kinsbursky if (nn->nfsd_serv == NULL) 6860a5372d8SChuck Lever return 0; 6879dd9845fSStanislav Kinsbursky return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 6880a5372d8SChuck Lever } 6890a5372d8SChuck Lever 6900a5372d8SChuck Lever /* 6910b7c2f6fSChuck Lever * A single 'fd' number was written, in which case it must be for 6920b7c2f6fSChuck Lever * a socket of a supported family/protocol, and we use it as an 6930b7c2f6fSChuck Lever * nfsd listener. 6940b7c2f6fSChuck Lever */ 6954df493a2STrond Myklebust static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 6960b7c2f6fSChuck Lever { 6970b7c2f6fSChuck Lever char *mesg = buf; 6980b7c2f6fSChuck Lever int fd, err; 6999dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 70064e63041SJeff Layton struct svc_serv *serv; 7010b7c2f6fSChuck Lever 7020b7c2f6fSChuck Lever err = get_int(&mesg, &fd); 7030b7c2f6fSChuck Lever if (err != 0 || fd < 0) 7040b7c2f6fSChuck Lever return -EINVAL; 70539d432fcSChuck Lever trace_nfsd_ctl_ports_addfd(net, fd); 7060b7c2f6fSChuck Lever 7076777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7080b7c2f6fSChuck Lever if (err != 0) 7090b7c2f6fSChuck Lever return err; 7100b7c2f6fSChuck Lever 71164e63041SJeff Layton serv = nn->nfsd_serv; 71264e63041SJeff Layton err = svc_addsock(serv, net, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 713ea068badSChuck Lever 7141e3577a4SNeilBrown if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) 715*17419aefSNeilBrown nfsd_destroy_serv(net); 716*17419aefSNeilBrown 717ea068badSChuck Lever return err; 7180b7c2f6fSChuck Lever } 7190b7c2f6fSChuck Lever 7200b7c2f6fSChuck Lever /* 721442a6290SChuck Lever * A transport listener is added by writing its transport name and 7224eb68c26SChuck Lever * a port number. 7234eb68c26SChuck Lever */ 7244df493a2STrond Myklebust static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 7254eb68c26SChuck Lever { 7264eb68c26SChuck Lever char transport[16]; 72737498292SChuck Lever struct svc_xprt *xprt; 7284eb68c26SChuck Lever int port, err; 7299dd9845fSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 73064e63041SJeff Layton struct svc_serv *serv; 7314eb68c26SChuck Lever 732a10fded1SJ. Bruce Fields if (sscanf(buf, "%15s %5u", transport, &port) != 2) 7334eb68c26SChuck Lever return -EINVAL; 7344eb68c26SChuck Lever 7354be929beSAlexey Dobriyan if (port < 1 || port > USHRT_MAX) 7364eb68c26SChuck Lever return -EINVAL; 73739d432fcSChuck Lever trace_nfsd_ctl_ports_addxprt(net, transport, port); 7384eb68c26SChuck Lever 7396777436bSStanislav Kinsbursky err = nfsd_create_serv(net); 7404eb68c26SChuck Lever if (err != 0) 7414eb68c26SChuck Lever return err; 7424eb68c26SChuck Lever 74364e63041SJeff Layton serv = nn->nfsd_serv; 74464e63041SJeff Layton err = svc_xprt_create(serv, transport, net, 7454df493a2STrond Myklebust PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 74668717908SChuck Lever if (err < 0) 74737498292SChuck Lever goto out_err; 74837498292SChuck Lever 74964e63041SJeff Layton err = svc_xprt_create(serv, transport, net, 7504df493a2STrond Myklebust PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 75137498292SChuck Lever if (err < 0 && err != -EAFNOSUPPORT) 75237498292SChuck Lever goto out_close; 7530cd14a06SJeff Layton 7544eb68c26SChuck Lever return 0; 75537498292SChuck Lever out_close: 75664e63041SJeff Layton xprt = svc_find_xprt(serv, transport, net, PF_INET, port); 75737498292SChuck Lever if (xprt != NULL) { 7584355d767SChuck Lever svc_xprt_close(xprt); 75937498292SChuck Lever svc_xprt_put(xprt); 76037498292SChuck Lever } 76137498292SChuck Lever out_err: 7621e3577a4SNeilBrown if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) 763*17419aefSNeilBrown nfsd_destroy_serv(net); 7642a501f55SNeilBrown 76537498292SChuck Lever return err; 7664eb68c26SChuck Lever } 7674eb68c26SChuck Lever 76808160352SStanislav Kinsbursky static ssize_t __write_ports(struct file *file, char *buf, size_t size, 76908160352SStanislav Kinsbursky struct net *net) 77080212d59SNeilBrown { 7710a5372d8SChuck Lever if (size == 0) 7729dd9845fSStanislav Kinsbursky return __write_ports_names(buf, net); 7730b7c2f6fSChuck Lever 7740b7c2f6fSChuck Lever if (isdigit(buf[0])) 7754df493a2STrond Myklebust return __write_ports_addfd(buf, net, file->f_cred); 77682d56591SChuck Lever 7774eb68c26SChuck Lever if (isalpha(buf[0])) 7784df493a2STrond Myklebust return __write_ports_addxprt(buf, net, file->f_cred); 7794cd5dc75SChuck Lever 780b41b66d6SNeilBrown return -EINVAL; 781b41b66d6SNeilBrown } 78280212d59SNeilBrown 783f2453978SChuck Lever /* 784262a0982SChuck Lever * write_ports - Pass a socket file descriptor or transport name to listen on 785262a0982SChuck Lever * 786262a0982SChuck Lever * Input: 787262a0982SChuck Lever * buf: ignored 788262a0982SChuck Lever * size: zero 789262a0982SChuck Lever * Output: 790262a0982SChuck Lever * On success: passed-in buffer filled with a '\n'-terminated C 791262a0982SChuck Lever * string containing a whitespace-separated list of 792262a0982SChuck Lever * named NFSD listeners; 793262a0982SChuck Lever * return code is the size in bytes of the string 794262a0982SChuck Lever * On error: return code is zero or a negative errno value 795262a0982SChuck Lever * 796262a0982SChuck Lever * OR 797262a0982SChuck Lever * 798262a0982SChuck Lever * Input: 799262a0982SChuck Lever * buf: C string containing an unsigned 800262a0982SChuck Lever * integer value representing a bound 801262a0982SChuck Lever * but unconnected socket that is to be 802c71206a7SChuck Lever * used as an NFSD listener; listen(3) 803c71206a7SChuck Lever * must be called for a SOCK_STREAM 804c71206a7SChuck Lever * socket, otherwise it is ignored 805262a0982SChuck Lever * size: non-zero length of C string in @buf 806262a0982SChuck Lever * Output: 807262a0982SChuck Lever * On success: NFS service is started; 808262a0982SChuck Lever * passed-in buffer filled with a '\n'-terminated C 809262a0982SChuck Lever * string containing a unique alphanumeric name of 810262a0982SChuck Lever * the listener; 811262a0982SChuck Lever * return code is the size in bytes of the string 812262a0982SChuck Lever * On error: return code is a negative errno value 813262a0982SChuck Lever * 814262a0982SChuck Lever * OR 815262a0982SChuck Lever * 816262a0982SChuck Lever * Input: 817262a0982SChuck Lever * buf: C string containing a transport 818262a0982SChuck Lever * name and an unsigned integer value 819262a0982SChuck Lever * representing the port to listen on, 820262a0982SChuck Lever * separated by whitespace 821262a0982SChuck Lever * size: non-zero length of C string in @buf 822262a0982SChuck Lever * Output: 823262a0982SChuck Lever * On success: returns zero; NFS service is started 824262a0982SChuck Lever * On error: return code is a negative errno value 825262a0982SChuck Lever */ 826bedbdd8bSNeil Brown static ssize_t write_ports(struct file *file, char *buf, size_t size) 827bedbdd8bSNeil Brown { 828bedbdd8bSNeil Brown ssize_t rv; 8293dd98a3bSJeff Layton 830bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 831244c7d44SAl Viro rv = __write_ports(file, buf, size, netns(file)); 832bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 833bedbdd8bSNeil Brown return rv; 834bedbdd8bSNeil Brown } 835bedbdd8bSNeil Brown 836bedbdd8bSNeil Brown 837596bbe53SNeilBrown int nfsd_max_blksize; 838596bbe53SNeilBrown 839f2453978SChuck Lever /* 840262a0982SChuck Lever * write_maxblksize - Set or report the current NFS blksize 841262a0982SChuck Lever * 842262a0982SChuck Lever * Input: 843262a0982SChuck Lever * buf: ignored 844262a0982SChuck Lever * size: zero 845262a0982SChuck Lever * 846262a0982SChuck Lever * OR 847262a0982SChuck Lever * 848262a0982SChuck Lever * Input: 849262a0982SChuck Lever * buf: C string containing an unsigned 850262a0982SChuck Lever * integer value representing the new 851262a0982SChuck Lever * NFS blksize 852262a0982SChuck Lever * size: non-zero length of C string in @buf 853262a0982SChuck Lever * Output: 854262a0982SChuck Lever * On success: passed-in buffer filled with '\n'-terminated C string 855262a0982SChuck Lever * containing numeric value of the current NFS blksize 856262a0982SChuck Lever * setting; 857262a0982SChuck Lever * return code is the size in bytes of the string 858262a0982SChuck Lever * On error: return code is zero or a negative errno value 859262a0982SChuck Lever */ 860596bbe53SNeilBrown static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 861596bbe53SNeilBrown { 862596bbe53SNeilBrown char *mesg = buf; 863244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 8649dd9845fSStanislav Kinsbursky 865596bbe53SNeilBrown if (size > 0) { 866596bbe53SNeilBrown int bsize; 867596bbe53SNeilBrown int rv = get_int(&mesg, &bsize); 868596bbe53SNeilBrown if (rv) 869596bbe53SNeilBrown return rv; 87039d432fcSChuck Lever trace_nfsd_ctl_maxblksize(netns(file), bsize); 87139d432fcSChuck Lever 872596bbe53SNeilBrown /* force bsize into allowed range and 873596bbe53SNeilBrown * required alignment. 874596bbe53SNeilBrown */ 8753c7aa15dSKinglong Mee bsize = max_t(int, bsize, 1024); 8763c7aa15dSKinglong Mee bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 877596bbe53SNeilBrown bsize &= ~(1024-1); 878bedbdd8bSNeil Brown mutex_lock(&nfsd_mutex); 8799dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) { 880bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 881596bbe53SNeilBrown return -EBUSY; 882596bbe53SNeilBrown } 883596bbe53SNeilBrown nfsd_max_blksize = bsize; 884bedbdd8bSNeil Brown mutex_unlock(&nfsd_mutex); 885596bbe53SNeilBrown } 886e06b6405SChuck Lever 887e06b6405SChuck Lever return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 888e06b6405SChuck Lever nfsd_max_blksize); 889596bbe53SNeilBrown } 890596bbe53SNeilBrown 891f2453978SChuck Lever /* 8925b8db00bSJeff Layton * write_maxconn - Set or report the current max number of connections 8935b8db00bSJeff Layton * 8945b8db00bSJeff Layton * Input: 8955b8db00bSJeff Layton * buf: ignored 8965b8db00bSJeff Layton * size: zero 8975b8db00bSJeff Layton * OR 8985b8db00bSJeff Layton * 8995b8db00bSJeff Layton * Input: 9005b8db00bSJeff Layton * buf: C string containing an unsigned 9015b8db00bSJeff Layton * integer value representing the new 9025b8db00bSJeff Layton * number of max connections 9035b8db00bSJeff Layton * size: non-zero length of C string in @buf 9045b8db00bSJeff Layton * Output: 9055b8db00bSJeff Layton * On success: passed-in buffer filled with '\n'-terminated C string 9065b8db00bSJeff Layton * containing numeric value of max_connections setting 9075b8db00bSJeff Layton * for this net namespace; 9085b8db00bSJeff Layton * return code is the size in bytes of the string 9095b8db00bSJeff Layton * On error: return code is zero or a negative errno value 9105b8db00bSJeff Layton */ 9115b8db00bSJeff Layton static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 9125b8db00bSJeff Layton { 9135b8db00bSJeff Layton char *mesg = buf; 914244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 9155b8db00bSJeff Layton unsigned int maxconn = nn->max_connections; 9165b8db00bSJeff Layton 9175b8db00bSJeff Layton if (size > 0) { 9185b8db00bSJeff Layton int rv = get_uint(&mesg, &maxconn); 9195b8db00bSJeff Layton 9205b8db00bSJeff Layton if (rv) 9215b8db00bSJeff Layton return rv; 92239d432fcSChuck Lever trace_nfsd_ctl_maxconn(netns(file), maxconn); 9235b8db00bSJeff Layton nn->max_connections = maxconn; 9245b8db00bSJeff Layton } 9255b8db00bSJeff Layton 9265b8db00bSJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 9275b8db00bSJeff Layton } 9285b8db00bSJeff Layton 92970c3b76cSNeilBrown #ifdef CONFIG_NFSD_V4 9309dd9845fSStanislav Kinsbursky static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 93120b7d86fSArnd Bergmann time64_t *time, struct nfsd_net *nn) 9321da177e4SLinus Torvalds { 93339d432fcSChuck Lever struct dentry *dentry = file_dentry(file); 9341da177e4SLinus Torvalds char *mesg = buf; 935f0135740SJ. Bruce Fields int rv, i; 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds if (size > 0) { 9389dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 9393dd98a3bSJeff Layton return -EBUSY; 940f0135740SJ. Bruce Fields rv = get_int(&mesg, &i); 9411da177e4SLinus Torvalds if (rv) 9421da177e4SLinus Torvalds return rv; 94339d432fcSChuck Lever trace_nfsd_ctl_time(netns(file), dentry->d_name.name, 94439d432fcSChuck Lever dentry->d_name.len, i); 94539d432fcSChuck Lever 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 96320b7d86fSArnd Bergmann return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); 964f0135740SJ. Bruce Fields } 965f0135740SJ. Bruce Fields 9669dd9845fSStanislav Kinsbursky static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 96720b7d86fSArnd Bergmann time64_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 977f2453978SChuck 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 { 1000244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10019dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 10023dd98a3bSJeff Layton } 10033dd98a3bSJeff Layton 1004f2453978SChuck Lever /* 1005efc4bb4fSJ. Bruce Fields * write_gracetime - Set or report current NFSv4 grace period time 1006efc4bb4fSJ. Bruce Fields * 1007efc4bb4fSJ. Bruce Fields * As above, but sets the time of the NFSv4 grace period. 1008efc4bb4fSJ. Bruce Fields * 1009efc4bb4fSJ. Bruce Fields * Note this should never be set to less than the *previous* 1010efc4bb4fSJ. Bruce Fields * lease-period time, but we don't try to enforce this. (In the common 1011efc4bb4fSJ. Bruce Fields * case (a new boot), we don't know what the previous lease time was 1012efc4bb4fSJ. Bruce Fields * anyway.) 1013efc4bb4fSJ. Bruce Fields */ 1014efc4bb4fSJ. Bruce Fields static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1015efc4bb4fSJ. Bruce Fields { 1016244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10179dd9845fSStanislav Kinsbursky return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1018efc4bb4fSJ. Bruce Fields } 1019efc4bb4fSJ. Bruce Fields 102074fd4873SJeff Layton #ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING 10219dd9845fSStanislav Kinsbursky static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 10229dd9845fSStanislav Kinsbursky struct nfsd_net *nn) 10230964a3d3SNeilBrown { 10240964a3d3SNeilBrown char *mesg = buf; 10250964a3d3SNeilBrown char *recdir; 10260964a3d3SNeilBrown int len, status; 10270964a3d3SNeilBrown 10283dd98a3bSJeff Layton if (size > 0) { 10299dd9845fSStanislav Kinsbursky if (nn->nfsd_serv) 10303dd98a3bSJeff Layton return -EBUSY; 10313dd98a3bSJeff Layton if (size > PATH_MAX || buf[size-1] != '\n') 10320964a3d3SNeilBrown return -EINVAL; 10330964a3d3SNeilBrown buf[size-1] = 0; 10340964a3d3SNeilBrown 10350964a3d3SNeilBrown recdir = mesg; 10360964a3d3SNeilBrown len = qword_get(&mesg, recdir, size); 10370964a3d3SNeilBrown if (len <= 0) 10380964a3d3SNeilBrown return -EINVAL; 103939d432fcSChuck Lever trace_nfsd_ctl_recoverydir(netns(file), recdir); 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 1050f2453978SChuck 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; 1074244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 10753dd98a3bSJeff Layton 10763dd98a3bSJeff Layton mutex_lock(&nfsd_mutex); 10779dd9845fSStanislav Kinsbursky rv = __write_recoverydir(file, buf, size, nn); 10783dd98a3bSJeff Layton mutex_unlock(&nfsd_mutex); 10793dd98a3bSJeff Layton return rv; 10803dd98a3bSJeff Layton } 108174fd4873SJeff Layton #endif 10823dd98a3bSJeff Layton 1083f2453978SChuck Lever /* 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 { 1105244c7d44SAl Viro struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 11067f5ef2e9SJeff Layton 11077f5ef2e9SJeff Layton if (size > 0) { 11087f5ef2e9SJeff Layton switch(buf[0]) { 11097f5ef2e9SJeff Layton case 'Y': 11107f5ef2e9SJeff Layton case 'y': 11117f5ef2e9SJeff Layton case '1': 1112dd838821SYihao Wu if (!nn->nfsd_serv) 111362a063b8SJ. Bruce Fields return -EBUSY; 111439d432fcSChuck Lever trace_nfsd_end_grace(netns(file)); 11158073a98eSChuck Lever nfsd4_end_grace(nn); 11167f5ef2e9SJeff Layton break; 11177f5ef2e9SJeff Layton default: 11187f5ef2e9SJeff Layton return -EINVAL; 11197f5ef2e9SJeff Layton } 11207f5ef2e9SJeff Layton } 11217f5ef2e9SJeff Layton 11227f5ef2e9SJeff Layton return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 11237f5ef2e9SJeff Layton nn->grace_ended ? 'Y' : 'N'); 11247f5ef2e9SJeff Layton } 11257f5ef2e9SJeff Layton 112670c3b76cSNeilBrown #endif 11270964a3d3SNeilBrown 11281da177e4SLinus Torvalds /*----------------------------------------------------------------------------*/ 11291da177e4SLinus Torvalds /* 11301da177e4SLinus Torvalds * populating the filesystem. 11311da177e4SLinus Torvalds */ 11321da177e4SLinus Torvalds 1133e8a79fb1SJ. Bruce Fields /* Basically copying rpc_get_inode. */ 1134e8a79fb1SJ. Bruce Fields static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) 1135e8a79fb1SJ. Bruce Fields { 1136e8a79fb1SJ. Bruce Fields struct inode *inode = new_inode(sb); 1137e8a79fb1SJ. Bruce Fields if (!inode) 1138e8a79fb1SJ. Bruce Fields return NULL; 1139e8a79fb1SJ. Bruce Fields /* Following advice from simple_fill_super documentation: */ 1140e8a79fb1SJ. Bruce Fields inode->i_ino = iunique(sb, NFSD_MaxReserved); 1141e8a79fb1SJ. Bruce Fields inode->i_mode = mode; 114211fec9b9SJeff Layton simple_inode_init_ts(inode); 1143e8a79fb1SJ. Bruce Fields switch (mode & S_IFMT) { 1144e8a79fb1SJ. Bruce Fields case S_IFDIR: 1145e8a79fb1SJ. Bruce Fields inode->i_fop = &simple_dir_operations; 1146e8a79fb1SJ. Bruce Fields inode->i_op = &simple_dir_inode_operations; 1147e8a79fb1SJ. Bruce Fields inc_nlink(inode); 114876c50eb7SGustavo A. R. Silva break; 11494df750c9SChuck Lever case S_IFLNK: 11504df750c9SChuck Lever inode->i_op = &simple_symlink_inode_operations; 11514df750c9SChuck Lever break; 1152e8a79fb1SJ. Bruce Fields default: 1153e8a79fb1SJ. Bruce Fields break; 1154e8a79fb1SJ. Bruce Fields } 1155e8a79fb1SJ. Bruce Fields return inode; 1156e8a79fb1SJ. Bruce Fields } 1157e8a79fb1SJ. Bruce Fields 1158bebd6997SJ. Bruce Fields static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) 1159e8a79fb1SJ. Bruce Fields { 1160e8a79fb1SJ. Bruce Fields struct inode *inode; 1161e8a79fb1SJ. Bruce Fields 1162e8a79fb1SJ. Bruce Fields inode = nfsd_get_inode(dir->i_sb, mode); 1163e8a79fb1SJ. Bruce Fields if (!inode) 1164e8a79fb1SJ. Bruce Fields return -ENOMEM; 1165bebd6997SJ. Bruce Fields if (ncl) { 1166bebd6997SJ. Bruce Fields inode->i_private = ncl; 1167bebd6997SJ. Bruce Fields kref_get(&ncl->cl_ref); 1168bebd6997SJ. Bruce Fields } 1169e8a79fb1SJ. Bruce Fields d_add(dentry, inode); 1170e8a79fb1SJ. Bruce Fields inc_nlink(dir); 1171e8a79fb1SJ. Bruce Fields fsnotify_mkdir(dir, dentry); 1172e8a79fb1SJ. Bruce Fields return 0; 1173e8a79fb1SJ. Bruce Fields } 1174e8a79fb1SJ. Bruce Fields 1175e8a79fb1SJ. Bruce Fields static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) 1176e8a79fb1SJ. Bruce Fields { 1177e8a79fb1SJ. Bruce Fields struct inode *dir = parent->d_inode; 1178e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1179e8a79fb1SJ. Bruce Fields int ret = -ENOMEM; 1180e8a79fb1SJ. Bruce Fields 1181e8a79fb1SJ. Bruce Fields inode_lock(dir); 1182e8a79fb1SJ. Bruce Fields dentry = d_alloc_name(parent, name); 1183e8a79fb1SJ. Bruce Fields if (!dentry) 1184e8a79fb1SJ. Bruce Fields goto out_err; 1185bebd6997SJ. Bruce Fields ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); 1186e8a79fb1SJ. Bruce Fields if (ret) 1187e8a79fb1SJ. Bruce Fields goto out_err; 1188e8a79fb1SJ. Bruce Fields out: 1189e8a79fb1SJ. Bruce Fields inode_unlock(dir); 1190e8a79fb1SJ. Bruce Fields return dentry; 1191e8a79fb1SJ. Bruce Fields out_err: 1192d6846bfbSTetsuo Handa dput(dentry); 1193e8a79fb1SJ. Bruce Fields dentry = ERR_PTR(ret); 1194e8a79fb1SJ. Bruce Fields goto out; 1195e8a79fb1SJ. Bruce Fields } 1196e8a79fb1SJ. Bruce Fields 11974df750c9SChuck Lever #if IS_ENABLED(CONFIG_SUNRPC_GSS) 11984df750c9SChuck Lever static int __nfsd_symlink(struct inode *dir, struct dentry *dentry, 11994df750c9SChuck Lever umode_t mode, const char *content) 12004df750c9SChuck Lever { 12014df750c9SChuck Lever struct inode *inode; 12024df750c9SChuck Lever 12034df750c9SChuck Lever inode = nfsd_get_inode(dir->i_sb, mode); 12044df750c9SChuck Lever if (!inode) 12054df750c9SChuck Lever return -ENOMEM; 12064df750c9SChuck Lever 12074df750c9SChuck Lever inode->i_link = (char *)content; 12084df750c9SChuck Lever inode->i_size = strlen(content); 12094df750c9SChuck Lever 12104df750c9SChuck Lever d_add(dentry, inode); 12114df750c9SChuck Lever inc_nlink(dir); 12124df750c9SChuck Lever fsnotify_create(dir, dentry); 12134df750c9SChuck Lever return 0; 12144df750c9SChuck Lever } 12154df750c9SChuck Lever 12164df750c9SChuck Lever /* 12174df750c9SChuck Lever * @content is assumed to be a NUL-terminated string that lives 12184df750c9SChuck Lever * longer than the symlink itself. 12194df750c9SChuck Lever */ 122039d432fcSChuck Lever static void _nfsd_symlink(struct dentry *parent, const char *name, 12214df750c9SChuck Lever const char *content) 12224df750c9SChuck Lever { 12234df750c9SChuck Lever struct inode *dir = parent->d_inode; 12244df750c9SChuck Lever struct dentry *dentry; 12254b471a8bSChuck Lever int ret; 12264df750c9SChuck Lever 12274df750c9SChuck Lever inode_lock(dir); 12284df750c9SChuck Lever dentry = d_alloc_name(parent, name); 12294df750c9SChuck Lever if (!dentry) 12304b471a8bSChuck Lever goto out; 12314df750c9SChuck Lever ret = __nfsd_symlink(d_inode(parent), dentry, S_IFLNK | 0777, content); 12324df750c9SChuck Lever if (ret) 12334b471a8bSChuck Lever dput(dentry); 12344df750c9SChuck Lever out: 12354df750c9SChuck Lever inode_unlock(dir); 12364df750c9SChuck Lever } 12374df750c9SChuck Lever #else 123839d432fcSChuck Lever static inline void _nfsd_symlink(struct dentry *parent, const char *name, 12394df750c9SChuck Lever const char *content) 12404df750c9SChuck Lever { 12414df750c9SChuck Lever } 12424df750c9SChuck Lever 12434df750c9SChuck Lever #endif 12444df750c9SChuck Lever 124597ad4031SJ. Bruce Fields static void clear_ncl(struct inode *inode) 1246e8a79fb1SJ. Bruce Fields { 124797ad4031SJ. Bruce Fields struct nfsdfs_client *ncl = inode->i_private; 124897ad4031SJ. Bruce Fields 124997ad4031SJ. Bruce Fields inode->i_private = NULL; 125097ad4031SJ. Bruce Fields kref_put(&ncl->cl_ref, ncl->cl_release); 125197ad4031SJ. Bruce Fields } 125297ad4031SJ. Bruce Fields 1253b78fa45dSYueHaibing static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) 125497ad4031SJ. Bruce Fields { 125597ad4031SJ. Bruce Fields struct nfsdfs_client *nc = inode->i_private; 125697ad4031SJ. Bruce Fields 125797ad4031SJ. Bruce Fields if (nc) 125897ad4031SJ. Bruce Fields kref_get(&nc->cl_ref); 125997ad4031SJ. Bruce Fields return nc; 126097ad4031SJ. Bruce Fields } 126197ad4031SJ. Bruce Fields 126297ad4031SJ. Bruce Fields struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) 126397ad4031SJ. Bruce Fields { 126497ad4031SJ. Bruce Fields struct nfsdfs_client *nc; 126597ad4031SJ. Bruce Fields 1266dc46bba7SJ. Bruce Fields inode_lock_shared(inode); 126797ad4031SJ. Bruce Fields nc = __get_nfsdfs_client(inode); 1268dc46bba7SJ. Bruce Fields inode_unlock_shared(inode); 126997ad4031SJ. Bruce Fields return nc; 127097ad4031SJ. Bruce Fields } 127197ad4031SJ. Bruce Fields /* from __rpc_unlink */ 127297ad4031SJ. Bruce Fields static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) 127397ad4031SJ. Bruce Fields { 127497ad4031SJ. Bruce Fields int ret; 127597ad4031SJ. Bruce Fields 127697ad4031SJ. Bruce Fields clear_ncl(d_inode(dentry)); 127797ad4031SJ. Bruce Fields dget(dentry); 127897ad4031SJ. Bruce Fields ret = simple_unlink(dir, dentry); 127929044daeSAmir Goldstein d_drop(dentry); 128029044daeSAmir Goldstein fsnotify_unlink(dir, dentry); 128197ad4031SJ. Bruce Fields dput(dentry); 128297ad4031SJ. Bruce Fields WARN_ON_ONCE(ret); 128397ad4031SJ. Bruce Fields } 128497ad4031SJ. Bruce Fields 128597ad4031SJ. Bruce Fields static void nfsdfs_remove_files(struct dentry *root) 128697ad4031SJ. Bruce Fields { 128797ad4031SJ. Bruce Fields struct dentry *dentry, *tmp; 128897ad4031SJ. Bruce Fields 128997ad4031SJ. Bruce Fields list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { 129097ad4031SJ. Bruce Fields if (!simple_positive(dentry)) { 129197ad4031SJ. Bruce Fields WARN_ON_ONCE(1); /* I think this can't happen? */ 129297ad4031SJ. Bruce Fields continue; 129397ad4031SJ. Bruce Fields } 129497ad4031SJ. Bruce Fields nfsdfs_remove_file(d_inode(root), dentry); 129597ad4031SJ. Bruce Fields } 129697ad4031SJ. Bruce Fields } 129797ad4031SJ. Bruce Fields 129897ad4031SJ. Bruce Fields /* XXX: cut'n'paste from simple_fill_super; figure out if we could share 129997ad4031SJ. Bruce Fields * code instead. */ 130097ad4031SJ. Bruce Fields static int nfsdfs_create_files(struct dentry *root, 1301472d155aSNeilBrown const struct tree_descr *files, 1302472d155aSNeilBrown struct dentry **fdentries) 130397ad4031SJ. Bruce Fields { 130497ad4031SJ. Bruce Fields struct inode *dir = d_inode(root); 130597ad4031SJ. Bruce Fields struct inode *inode; 130697ad4031SJ. Bruce Fields struct dentry *dentry; 130797ad4031SJ. Bruce Fields int i; 130897ad4031SJ. Bruce Fields 130997ad4031SJ. Bruce Fields inode_lock(dir); 131097ad4031SJ. Bruce Fields for (i = 0; files->name && files->name[0]; i++, files++) { 131197ad4031SJ. Bruce Fields dentry = d_alloc_name(root, files->name); 131297ad4031SJ. Bruce Fields if (!dentry) 131397ad4031SJ. Bruce Fields goto out; 131497ad4031SJ. Bruce Fields inode = nfsd_get_inode(d_inode(root)->i_sb, 131597ad4031SJ. Bruce Fields S_IFREG | files->mode); 131697ad4031SJ. Bruce Fields if (!inode) { 131797ad4031SJ. Bruce Fields dput(dentry); 131897ad4031SJ. Bruce Fields goto out; 131997ad4031SJ. Bruce Fields } 132097ad4031SJ. Bruce Fields inode->i_fop = files->ops; 132197ad4031SJ. Bruce Fields inode->i_private = __get_nfsdfs_client(dir); 132297ad4031SJ. Bruce Fields d_add(dentry, inode); 132397ad4031SJ. Bruce Fields fsnotify_create(dir, dentry); 1324472d155aSNeilBrown if (fdentries) 1325472d155aSNeilBrown fdentries[i] = dentry; 132697ad4031SJ. Bruce Fields } 132797ad4031SJ. Bruce Fields inode_unlock(dir); 132897ad4031SJ. Bruce Fields return 0; 132997ad4031SJ. Bruce Fields out: 133097ad4031SJ. Bruce Fields nfsdfs_remove_files(root); 133197ad4031SJ. Bruce Fields inode_unlock(dir); 133297ad4031SJ. Bruce Fields return -ENOMEM; 133397ad4031SJ. Bruce Fields } 133497ad4031SJ. Bruce Fields 133597ad4031SJ. Bruce Fields /* on success, returns positive number unique to that client. */ 133697ad4031SJ. Bruce Fields struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 133797ad4031SJ. Bruce Fields struct nfsdfs_client *ncl, u32 id, 1338472d155aSNeilBrown const struct tree_descr *files, 1339472d155aSNeilBrown struct dentry **fdentries) 134097ad4031SJ. Bruce Fields { 134197ad4031SJ. Bruce Fields struct dentry *dentry; 1342e8a79fb1SJ. Bruce Fields char name[11]; 134397ad4031SJ. Bruce Fields int ret; 1344e8a79fb1SJ. Bruce Fields 1345bf5ed3e3SJ. Bruce Fields sprintf(name, "%u", id); 1346e8a79fb1SJ. Bruce Fields 134797ad4031SJ. Bruce Fields dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); 134897ad4031SJ. Bruce Fields if (IS_ERR(dentry)) /* XXX: tossing errors? */ 134997ad4031SJ. Bruce Fields return NULL; 1350472d155aSNeilBrown ret = nfsdfs_create_files(dentry, files, fdentries); 135197ad4031SJ. Bruce Fields if (ret) { 135297ad4031SJ. Bruce Fields nfsd_client_rmdir(dentry); 135397ad4031SJ. Bruce Fields return NULL; 135497ad4031SJ. Bruce Fields } 135597ad4031SJ. Bruce Fields return dentry; 1356e8a79fb1SJ. Bruce Fields } 1357e8a79fb1SJ. Bruce Fields 1358e8a79fb1SJ. Bruce Fields /* Taken from __rpc_rmdir: */ 1359e8a79fb1SJ. Bruce Fields void nfsd_client_rmdir(struct dentry *dentry) 1360e8a79fb1SJ. Bruce Fields { 1361e8a79fb1SJ. Bruce Fields struct inode *dir = d_inode(dentry->d_parent); 1362e8a79fb1SJ. Bruce Fields struct inode *inode = d_inode(dentry); 1363e8a79fb1SJ. Bruce Fields int ret; 1364e8a79fb1SJ. Bruce Fields 136597ad4031SJ. Bruce Fields inode_lock(dir); 136697ad4031SJ. Bruce Fields nfsdfs_remove_files(dentry); 136797ad4031SJ. Bruce Fields clear_ncl(inode); 1368e8a79fb1SJ. Bruce Fields dget(dentry); 1369e8a79fb1SJ. Bruce Fields ret = simple_rmdir(dir, dentry); 1370e8a79fb1SJ. Bruce Fields WARN_ON_ONCE(ret); 137129044daeSAmir Goldstein d_drop(dentry); 137269afd267SJ. Bruce Fields fsnotify_rmdir(dir, dentry); 1373bf265401SJ. Bruce Fields dput(dentry); 137497ad4031SJ. Bruce Fields inode_unlock(dir); 1375e8a79fb1SJ. Bruce Fields } 1376e8a79fb1SJ. Bruce Fields 137796a374a3SDavid Howells static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) 13781da177e4SLinus Torvalds { 1379e8a79fb1SJ. Bruce Fields struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 1380e8a79fb1SJ. Bruce Fields nfsd_net_id); 1381e8a79fb1SJ. Bruce Fields struct dentry *dentry; 1382e8a79fb1SJ. Bruce Fields int ret; 1383e8a79fb1SJ. Bruce Fields 1384cda37124SEric Biggers static const struct tree_descr nfsd_files[] = { 138596d851c4SStanislav Kinsbursky [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 138620ad856eSAmir Goldstein /* Per-export io stats use same ops as exports file */ 138720ad856eSAmir Goldstein [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO}, 1388e8e8753fSJ. Bruce Fields [NFSD_Export_features] = {"export_features", 13899beeaab8SChenXiaoSong &export_features_fops, S_IRUGO}, 13904373ea84SWendy Cheng [NFSD_FO_UnlockIP] = {"unlock_ip", 13914373ea84SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 139217efa372SWendy Cheng [NFSD_FO_UnlockFS] = {"unlock_filesystem", 139317efa372SWendy Cheng &transaction_ops, S_IWUSR|S_IRUSR}, 13941da177e4SLinus Torvalds [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 13951da177e4SLinus Torvalds [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1396eed2965aSGreg Banks [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 139703cf6c9fSGreg Banks [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 139864776611SChenXiaoSong [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", 139964776611SChenXiaoSong &nfsd_reply_cache_stats_fops, S_IRUGO}, 140070c3b76cSNeilBrown [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 140180212d59SNeilBrown [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1402596bbe53SNeilBrown [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 14035b8db00bSJeff Layton [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 14041342f9ddSChenXiaoSong [NFSD_Filecache] = {"filecache", &nfsd_file_cache_stats_fops, S_IRUGO}, 14051da177e4SLinus Torvalds #ifdef CONFIG_NFSD_V4 14061da177e4SLinus Torvalds [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1407efc4bb4fSJ. Bruce Fields [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 14080964a3d3SNeilBrown [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 14097f5ef2e9SJeff Layton [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 14101da177e4SLinus Torvalds #endif 14111da177e4SLinus Torvalds /* last one */ {""} 14121da177e4SLinus Torvalds }; 141396a374a3SDavid Howells 1414e8a79fb1SJ. Bruce Fields ret = simple_fill_super(sb, 0x6e667364, nfsd_files); 1415e8a79fb1SJ. Bruce Fields if (ret) 1416e8a79fb1SJ. Bruce Fields return ret; 141739d432fcSChuck Lever _nfsd_symlink(sb->s_root, "supported_krb5_enctypes", 14184df750c9SChuck Lever "/proc/net/rpc/gss_krb5_enctypes"); 1419e8a79fb1SJ. Bruce Fields dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); 1420e8a79fb1SJ. Bruce Fields if (IS_ERR(dentry)) 1421e8a79fb1SJ. Bruce Fields return PTR_ERR(dentry); 1422e8a79fb1SJ. Bruce Fields nn->nfsd_client_dir = dentry; 1423e8a79fb1SJ. Bruce Fields return 0; 14241da177e4SLinus Torvalds } 14251da177e4SLinus Torvalds 142696a374a3SDavid Howells static int nfsd_fs_get_tree(struct fs_context *fc) 14271da177e4SLinus Torvalds { 1428533770ccSAl Viro return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); 142996a374a3SDavid Howells } 143096a374a3SDavid Howells 143196a374a3SDavid Howells static void nfsd_fs_free_fc(struct fs_context *fc) 143296a374a3SDavid Howells { 143396a374a3SDavid Howells if (fc->s_fs_info) 143496a374a3SDavid Howells put_net(fc->s_fs_info); 143596a374a3SDavid Howells } 143696a374a3SDavid Howells 143796a374a3SDavid Howells static const struct fs_context_operations nfsd_fs_context_ops = { 143896a374a3SDavid Howells .free = nfsd_fs_free_fc, 143996a374a3SDavid Howells .get_tree = nfsd_fs_get_tree, 144096a374a3SDavid Howells }; 144196a374a3SDavid Howells 144296a374a3SDavid Howells static int nfsd_init_fs_context(struct fs_context *fc) 144396a374a3SDavid Howells { 144496a374a3SDavid Howells put_user_ns(fc->user_ns); 144596a374a3SDavid Howells fc->user_ns = get_user_ns(fc->net_ns->user_ns); 144696a374a3SDavid Howells fc->ops = &nfsd_fs_context_ops; 144796a374a3SDavid Howells return 0; 144811f77942SStanislav Kinsbursky } 144911f77942SStanislav Kinsbursky 145011f77942SStanislav Kinsbursky static void nfsd_umount(struct super_block *sb) 145111f77942SStanislav Kinsbursky { 145211f77942SStanislav Kinsbursky struct net *net = sb->s_fs_info; 145311f77942SStanislav Kinsbursky 1454c6c7f2a8STrond Myklebust nfsd_shutdown_threads(net); 1455c6c7f2a8STrond Myklebust 145611f77942SStanislav Kinsbursky kill_litter_super(sb); 145711f77942SStanislav Kinsbursky put_net(net); 14581da177e4SLinus Torvalds } 14591da177e4SLinus Torvalds 14601da177e4SLinus Torvalds static struct file_system_type nfsd_fs_type = { 14611da177e4SLinus Torvalds .owner = THIS_MODULE, 14621da177e4SLinus Torvalds .name = "nfsd", 146396a374a3SDavid Howells .init_fs_context = nfsd_init_fs_context, 146411f77942SStanislav Kinsbursky .kill_sb = nfsd_umount, 14651da177e4SLinus Torvalds }; 14667f78e035SEric W. Biederman MODULE_ALIAS_FS("nfsd"); 14671da177e4SLinus Torvalds 1468e331f606SJ. Bruce Fields #ifdef CONFIG_PROC_FS 1469340086daSTom Rix 1470340086daSTom Rix static int exports_proc_open(struct inode *inode, struct file *file) 1471340086daSTom Rix { 1472340086daSTom Rix return exports_net_open(current->nsproxy->net_ns, file); 1473340086daSTom Rix } 1474340086daSTom Rix 1475340086daSTom Rix static const struct proc_ops exports_proc_ops = { 1476340086daSTom Rix .proc_open = exports_proc_open, 1477340086daSTom Rix .proc_read = seq_read, 1478340086daSTom Rix .proc_lseek = seq_lseek, 1479340086daSTom Rix .proc_release = seq_release, 1480340086daSTom Rix }; 1481340086daSTom Rix 1482e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1483e331f606SJ. Bruce Fields { 1484e331f606SJ. Bruce Fields struct proc_dir_entry *entry; 1485e331f606SJ. Bruce Fields 1486e331f606SJ. Bruce Fields entry = proc_mkdir("fs/nfs", NULL); 1487e331f606SJ. Bruce Fields if (!entry) 1488e331f606SJ. Bruce Fields return -ENOMEM; 148997a32539SAlexey Dobriyan entry = proc_create("exports", 0, entry, &exports_proc_ops); 1490ff7c4b36Sfanchaoting if (!entry) { 1491ff7c4b36Sfanchaoting remove_proc_entry("fs/nfs", NULL); 1492e331f606SJ. Bruce Fields return -ENOMEM; 1493ff7c4b36Sfanchaoting } 1494e331f606SJ. Bruce Fields return 0; 1495e331f606SJ. Bruce Fields } 1496e331f606SJ. Bruce Fields #else /* CONFIG_PROC_FS */ 1497e331f606SJ. Bruce Fields static int create_proc_exports_entry(void) 1498e331f606SJ. Bruce Fields { 1499e331f606SJ. Bruce Fields return 0; 1500e331f606SJ. Bruce Fields } 1501e331f606SJ. Bruce Fields #endif 1502e331f606SJ. Bruce Fields 1503c7d03a00SAlexey Dobriyan unsigned int nfsd_net_id; 15045717e012SStanislav Kinsbursky 15055e092be7SChuck Lever /** 1506bd9d6a3eSLorenzo Bianconi * nfsd_nl_rpc_status_get_start - Prepare rpc_status_get dumpit 1507bd9d6a3eSLorenzo Bianconi * @cb: netlink metadata and command arguments 1508bd9d6a3eSLorenzo Bianconi * 1509bd9d6a3eSLorenzo Bianconi * Return values: 1510bd9d6a3eSLorenzo Bianconi * %0: The rpc_status_get command may proceed 1511bd9d6a3eSLorenzo Bianconi * %-ENODEV: There is no NFSD running in this namespace 1512bd9d6a3eSLorenzo Bianconi */ 151313727f85SLorenzo Bianconi int nfsd_nl_rpc_status_get_start(struct netlink_callback *cb) 151413727f85SLorenzo Bianconi { 1515bd9d6a3eSLorenzo Bianconi struct nfsd_net *nn = net_generic(sock_net(cb->skb->sk), nfsd_net_id); 1516bd9d6a3eSLorenzo Bianconi int ret = -ENODEV; 1517bd9d6a3eSLorenzo Bianconi 1518bd9d6a3eSLorenzo Bianconi mutex_lock(&nfsd_mutex); 15191bd773b4SNeilBrown if (nn->nfsd_serv) 1520bd9d6a3eSLorenzo Bianconi ret = 0; 15211bd773b4SNeilBrown else 1522bd9d6a3eSLorenzo Bianconi mutex_unlock(&nfsd_mutex); 1523bd9d6a3eSLorenzo Bianconi 1524bd9d6a3eSLorenzo Bianconi return ret; 1525bd9d6a3eSLorenzo Bianconi } 1526bd9d6a3eSLorenzo Bianconi 1527bd9d6a3eSLorenzo Bianconi static int nfsd_genl_rpc_status_compose_msg(struct sk_buff *skb, 1528bd9d6a3eSLorenzo Bianconi struct netlink_callback *cb, 1529bd9d6a3eSLorenzo Bianconi struct nfsd_genl_rqstp *rqstp) 1530bd9d6a3eSLorenzo Bianconi { 1531bd9d6a3eSLorenzo Bianconi void *hdr; 1532bd9d6a3eSLorenzo Bianconi u32 i; 1533bd9d6a3eSLorenzo Bianconi 1534bd9d6a3eSLorenzo Bianconi hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1535bd9d6a3eSLorenzo Bianconi &nfsd_nl_family, 0, NFSD_CMD_RPC_STATUS_GET); 1536bd9d6a3eSLorenzo Bianconi if (!hdr) 1537bd9d6a3eSLorenzo Bianconi return -ENOBUFS; 1538bd9d6a3eSLorenzo Bianconi 1539bd9d6a3eSLorenzo Bianconi if (nla_put_be32(skb, NFSD_A_RPC_STATUS_XID, rqstp->rq_xid) || 1540bd9d6a3eSLorenzo Bianconi nla_put_u32(skb, NFSD_A_RPC_STATUS_FLAGS, rqstp->rq_flags) || 1541bd9d6a3eSLorenzo Bianconi nla_put_u32(skb, NFSD_A_RPC_STATUS_PROG, rqstp->rq_prog) || 1542bd9d6a3eSLorenzo Bianconi nla_put_u32(skb, NFSD_A_RPC_STATUS_PROC, rqstp->rq_proc) || 1543bd9d6a3eSLorenzo Bianconi nla_put_u8(skb, NFSD_A_RPC_STATUS_VERSION, rqstp->rq_vers) || 1544bd9d6a3eSLorenzo Bianconi nla_put_s64(skb, NFSD_A_RPC_STATUS_SERVICE_TIME, 1545bd9d6a3eSLorenzo Bianconi ktime_to_us(rqstp->rq_stime), 1546bd9d6a3eSLorenzo Bianconi NFSD_A_RPC_STATUS_PAD)) 1547bd9d6a3eSLorenzo Bianconi return -ENOBUFS; 1548bd9d6a3eSLorenzo Bianconi 1549bd9d6a3eSLorenzo Bianconi switch (rqstp->rq_saddr.sa_family) { 1550bd9d6a3eSLorenzo Bianconi case AF_INET: { 1551bd9d6a3eSLorenzo Bianconi const struct sockaddr_in *s_in, *d_in; 1552bd9d6a3eSLorenzo Bianconi 1553bd9d6a3eSLorenzo Bianconi s_in = (const struct sockaddr_in *)&rqstp->rq_saddr; 1554bd9d6a3eSLorenzo Bianconi d_in = (const struct sockaddr_in *)&rqstp->rq_daddr; 1555bd9d6a3eSLorenzo Bianconi if (nla_put_in_addr(skb, NFSD_A_RPC_STATUS_SADDR4, 1556bd9d6a3eSLorenzo Bianconi s_in->sin_addr.s_addr) || 1557bd9d6a3eSLorenzo Bianconi nla_put_in_addr(skb, NFSD_A_RPC_STATUS_DADDR4, 1558bd9d6a3eSLorenzo Bianconi d_in->sin_addr.s_addr) || 1559bd9d6a3eSLorenzo Bianconi nla_put_be16(skb, NFSD_A_RPC_STATUS_SPORT, 1560bd9d6a3eSLorenzo Bianconi s_in->sin_port) || 1561bd9d6a3eSLorenzo Bianconi nla_put_be16(skb, NFSD_A_RPC_STATUS_DPORT, 1562bd9d6a3eSLorenzo Bianconi d_in->sin_port)) 1563bd9d6a3eSLorenzo Bianconi return -ENOBUFS; 1564bd9d6a3eSLorenzo Bianconi break; 1565bd9d6a3eSLorenzo Bianconi } 1566bd9d6a3eSLorenzo Bianconi case AF_INET6: { 1567bd9d6a3eSLorenzo Bianconi const struct sockaddr_in6 *s_in, *d_in; 1568bd9d6a3eSLorenzo Bianconi 1569bd9d6a3eSLorenzo Bianconi s_in = (const struct sockaddr_in6 *)&rqstp->rq_saddr; 1570bd9d6a3eSLorenzo Bianconi d_in = (const struct sockaddr_in6 *)&rqstp->rq_daddr; 1571bd9d6a3eSLorenzo Bianconi if (nla_put_in6_addr(skb, NFSD_A_RPC_STATUS_SADDR6, 1572bd9d6a3eSLorenzo Bianconi &s_in->sin6_addr) || 1573bd9d6a3eSLorenzo Bianconi nla_put_in6_addr(skb, NFSD_A_RPC_STATUS_DADDR6, 1574bd9d6a3eSLorenzo Bianconi &d_in->sin6_addr) || 1575bd9d6a3eSLorenzo Bianconi nla_put_be16(skb, NFSD_A_RPC_STATUS_SPORT, 1576bd9d6a3eSLorenzo Bianconi s_in->sin6_port) || 1577bd9d6a3eSLorenzo Bianconi nla_put_be16(skb, NFSD_A_RPC_STATUS_DPORT, 1578bd9d6a3eSLorenzo Bianconi d_in->sin6_port)) 1579bd9d6a3eSLorenzo Bianconi return -ENOBUFS; 1580bd9d6a3eSLorenzo Bianconi break; 1581bd9d6a3eSLorenzo Bianconi } 1582bd9d6a3eSLorenzo Bianconi } 1583bd9d6a3eSLorenzo Bianconi 1584bd9d6a3eSLorenzo Bianconi for (i = 0; i < rqstp->rq_opcnt; i++) 1585bd9d6a3eSLorenzo Bianconi if (nla_put_u32(skb, NFSD_A_RPC_STATUS_COMPOUND_OPS, 1586bd9d6a3eSLorenzo Bianconi rqstp->rq_opnum[i])) 1587bd9d6a3eSLorenzo Bianconi return -ENOBUFS; 1588bd9d6a3eSLorenzo Bianconi 1589bd9d6a3eSLorenzo Bianconi genlmsg_end(skb, hdr); 159013727f85SLorenzo Bianconi return 0; 159113727f85SLorenzo Bianconi } 159213727f85SLorenzo Bianconi 1593bd9d6a3eSLorenzo Bianconi /** 1594bd9d6a3eSLorenzo Bianconi * nfsd_nl_rpc_status_get_dumpit - Handle rpc_status_get dumpit 1595bd9d6a3eSLorenzo Bianconi * @skb: reply buffer 1596bd9d6a3eSLorenzo Bianconi * @cb: netlink metadata and command arguments 1597bd9d6a3eSLorenzo Bianconi * 1598bd9d6a3eSLorenzo Bianconi * Returns the size of the reply or a negative errno. 1599bd9d6a3eSLorenzo Bianconi */ 160013727f85SLorenzo Bianconi int nfsd_nl_rpc_status_get_dumpit(struct sk_buff *skb, 160113727f85SLorenzo Bianconi struct netlink_callback *cb) 160213727f85SLorenzo Bianconi { 1603bd9d6a3eSLorenzo Bianconi struct nfsd_net *nn = net_generic(sock_net(skb->sk), nfsd_net_id); 1604bd9d6a3eSLorenzo Bianconi int i, ret, rqstp_index = 0; 1605bd9d6a3eSLorenzo Bianconi 1606bd9d6a3eSLorenzo Bianconi rcu_read_lock(); 1607bd9d6a3eSLorenzo Bianconi 1608bd9d6a3eSLorenzo Bianconi for (i = 0; i < nn->nfsd_serv->sv_nrpools; i++) { 1609bd9d6a3eSLorenzo Bianconi struct svc_rqst *rqstp; 1610bd9d6a3eSLorenzo Bianconi 1611bd9d6a3eSLorenzo Bianconi if (i < cb->args[0]) /* already consumed */ 1612bd9d6a3eSLorenzo Bianconi continue; 1613bd9d6a3eSLorenzo Bianconi 1614bd9d6a3eSLorenzo Bianconi rqstp_index = 0; 1615bd9d6a3eSLorenzo Bianconi list_for_each_entry_rcu(rqstp, 1616bd9d6a3eSLorenzo Bianconi &nn->nfsd_serv->sv_pools[i].sp_all_threads, 1617bd9d6a3eSLorenzo Bianconi rq_all) { 1618bd9d6a3eSLorenzo Bianconi struct nfsd_genl_rqstp genl_rqstp; 1619bd9d6a3eSLorenzo Bianconi unsigned int status_counter; 1620bd9d6a3eSLorenzo Bianconi 1621bd9d6a3eSLorenzo Bianconi if (rqstp_index++ < cb->args[1]) /* already consumed */ 1622bd9d6a3eSLorenzo Bianconi continue; 1623bd9d6a3eSLorenzo Bianconi /* 1624bd9d6a3eSLorenzo Bianconi * Acquire rq_status_counter before parsing the rqst 1625bd9d6a3eSLorenzo Bianconi * fields. rq_status_counter is set to an odd value in 1626bd9d6a3eSLorenzo Bianconi * order to notify the consumers the rqstp fields are 1627bd9d6a3eSLorenzo Bianconi * meaningful. 1628bd9d6a3eSLorenzo Bianconi */ 1629bd9d6a3eSLorenzo Bianconi status_counter = 1630bd9d6a3eSLorenzo Bianconi smp_load_acquire(&rqstp->rq_status_counter); 1631bd9d6a3eSLorenzo Bianconi if (!(status_counter & 1)) 1632bd9d6a3eSLorenzo Bianconi continue; 1633bd9d6a3eSLorenzo Bianconi 1634bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_xid = rqstp->rq_xid; 1635bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_flags = rqstp->rq_flags; 1636bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_vers = rqstp->rq_vers; 1637bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_prog = rqstp->rq_prog; 1638bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_proc = rqstp->rq_proc; 1639bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_stime = rqstp->rq_stime; 1640bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_opcnt = 0; 1641bd9d6a3eSLorenzo Bianconi memcpy(&genl_rqstp.rq_daddr, svc_daddr(rqstp), 1642bd9d6a3eSLorenzo Bianconi sizeof(struct sockaddr)); 1643bd9d6a3eSLorenzo Bianconi memcpy(&genl_rqstp.rq_saddr, svc_addr(rqstp), 1644bd9d6a3eSLorenzo Bianconi sizeof(struct sockaddr)); 1645bd9d6a3eSLorenzo Bianconi 1646bd9d6a3eSLorenzo Bianconi #ifdef CONFIG_NFSD_V4 1647bd9d6a3eSLorenzo Bianconi if (rqstp->rq_vers == NFS4_VERSION && 1648bd9d6a3eSLorenzo Bianconi rqstp->rq_proc == NFSPROC4_COMPOUND) { 1649bd9d6a3eSLorenzo Bianconi /* NFSv4 compound */ 1650bd9d6a3eSLorenzo Bianconi struct nfsd4_compoundargs *args; 1651bd9d6a3eSLorenzo Bianconi int j; 1652bd9d6a3eSLorenzo Bianconi 1653bd9d6a3eSLorenzo Bianconi args = rqstp->rq_argp; 1654bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_opcnt = args->opcnt; 1655bd9d6a3eSLorenzo Bianconi for (j = 0; j < genl_rqstp.rq_opcnt; j++) 1656bd9d6a3eSLorenzo Bianconi genl_rqstp.rq_opnum[j] = 1657bd9d6a3eSLorenzo Bianconi args->ops[j].opnum; 1658bd9d6a3eSLorenzo Bianconi } 1659bd9d6a3eSLorenzo Bianconi #endif /* CONFIG_NFSD_V4 */ 1660bd9d6a3eSLorenzo Bianconi 1661bd9d6a3eSLorenzo Bianconi /* 1662bd9d6a3eSLorenzo Bianconi * Acquire rq_status_counter before reporting the rqst 1663bd9d6a3eSLorenzo Bianconi * fields to the user. 1664bd9d6a3eSLorenzo Bianconi */ 1665bd9d6a3eSLorenzo Bianconi if (smp_load_acquire(&rqstp->rq_status_counter) != 1666bd9d6a3eSLorenzo Bianconi status_counter) 1667bd9d6a3eSLorenzo Bianconi continue; 1668bd9d6a3eSLorenzo Bianconi 1669bd9d6a3eSLorenzo Bianconi ret = nfsd_genl_rpc_status_compose_msg(skb, cb, 1670bd9d6a3eSLorenzo Bianconi &genl_rqstp); 1671bd9d6a3eSLorenzo Bianconi if (ret) 1672bd9d6a3eSLorenzo Bianconi goto out; 1673bd9d6a3eSLorenzo Bianconi } 167413727f85SLorenzo Bianconi } 167513727f85SLorenzo Bianconi 1676bd9d6a3eSLorenzo Bianconi cb->args[0] = i; 1677bd9d6a3eSLorenzo Bianconi cb->args[1] = rqstp_index; 1678bd9d6a3eSLorenzo Bianconi ret = skb->len; 1679bd9d6a3eSLorenzo Bianconi out: 1680bd9d6a3eSLorenzo Bianconi rcu_read_unlock(); 1681bd9d6a3eSLorenzo Bianconi 1682bd9d6a3eSLorenzo Bianconi return ret; 1683bd9d6a3eSLorenzo Bianconi } 1684bd9d6a3eSLorenzo Bianconi 1685bd9d6a3eSLorenzo Bianconi /** 1686bd9d6a3eSLorenzo Bianconi * nfsd_nl_rpc_status_get_done - rpc_status_get dumpit post-processing 1687bd9d6a3eSLorenzo Bianconi * @cb: netlink metadata and command arguments 1688bd9d6a3eSLorenzo Bianconi * 1689bd9d6a3eSLorenzo Bianconi * Return values: 1690bd9d6a3eSLorenzo Bianconi * %0: Success 1691bd9d6a3eSLorenzo Bianconi */ 169213727f85SLorenzo Bianconi int nfsd_nl_rpc_status_get_done(struct netlink_callback *cb) 169313727f85SLorenzo Bianconi { 1694bd9d6a3eSLorenzo Bianconi mutex_unlock(&nfsd_mutex); 1695bd9d6a3eSLorenzo Bianconi 169613727f85SLorenzo Bianconi return 0; 169713727f85SLorenzo Bianconi } 169813727f85SLorenzo Bianconi 16995e092be7SChuck Lever /** 17005e092be7SChuck Lever * nfsd_net_init - Prepare the nfsd_net portion of a new net namespace 17015e092be7SChuck Lever * @net: a freshly-created network namespace 17025e092be7SChuck Lever * 17035e092be7SChuck Lever * This information stays around as long as the network namespace is 17045e092be7SChuck Lever * alive whether or not there is an NFSD instance running in the 17055e092be7SChuck Lever * namespace. 17065e092be7SChuck Lever * 17075e092be7SChuck Lever * Returns zero on success, or a negative errno otherwise. 17085e092be7SChuck Lever */ 17095e092be7SChuck Lever static __net_init int nfsd_net_init(struct net *net) 17105717e012SStanislav Kinsbursky { 17115717e012SStanislav Kinsbursky int retval; 17123d733711SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 17135717e012SStanislav Kinsbursky 17145717e012SStanislav Kinsbursky retval = nfsd_export_init(net); 17155717e012SStanislav Kinsbursky if (retval) 17165717e012SStanislav Kinsbursky goto out_export_error; 1717f69adb2fSStanislav Kinsbursky retval = nfsd_idmap_init(net); 1718f69adb2fSStanislav Kinsbursky if (retval) 1719f69adb2fSStanislav Kinsbursky goto out_idmap_error; 1720ed9ab734SJeff Layton retval = nfsd_net_reply_cache_init(nn); 1721ed9ab734SJeff Layton if (retval) 1722ed9ab734SJeff Layton goto out_repcache_error; 1723e333f3bbSTrond Myklebust nn->nfsd_versions = NULL; 1724e333f3bbSTrond Myklebust nn->nfsd4_minorversions = NULL; 1725f385f7d2SDai Ngo nfsd4_init_leases_net(nn); 172691d2e9b5SChuck Lever get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); 172791d2e9b5SChuck Lever seqlock_init(&nn->writeverf_lock); 17282c830dd7SJ. Bruce Fields 17295717e012SStanislav Kinsbursky return 0; 17305717e012SStanislav Kinsbursky 1731ed9ab734SJeff Layton out_repcache_error: 1732ed9ab734SJeff Layton nfsd_idmap_shutdown(net); 1733f69adb2fSStanislav Kinsbursky out_idmap_error: 1734f69adb2fSStanislav Kinsbursky nfsd_export_shutdown(net); 17355717e012SStanislav Kinsbursky out_export_error: 17365717e012SStanislav Kinsbursky return retval; 17375717e012SStanislav Kinsbursky } 17385717e012SStanislav Kinsbursky 17395e092be7SChuck Lever /** 17405e092be7SChuck Lever * nfsd_net_exit - Release the nfsd_net portion of a net namespace 17415e092be7SChuck Lever * @net: a network namespace that is about to be destroyed 17425e092be7SChuck Lever * 17435e092be7SChuck Lever */ 17445e092be7SChuck Lever static __net_exit void nfsd_net_exit(struct net *net) 17455717e012SStanislav Kinsbursky { 1746ed9ab734SJeff Layton struct nfsd_net *nn = net_generic(net, nfsd_net_id); 1747ed9ab734SJeff Layton 1748ed9ab734SJeff Layton nfsd_net_reply_cache_destroy(nn); 1749f69adb2fSStanislav Kinsbursky nfsd_idmap_shutdown(net); 17505717e012SStanislav Kinsbursky nfsd_export_shutdown(net); 1751ed9ab734SJeff Layton nfsd_netns_free_versions(nn); 17525717e012SStanislav Kinsbursky } 17535717e012SStanislav Kinsbursky 17547ea34ac1SJeff Layton static struct pernet_operations nfsd_net_ops = { 17555e092be7SChuck Lever .init = nfsd_net_init, 17565e092be7SChuck Lever .exit = nfsd_net_exit, 17577ea34ac1SJeff Layton .id = &nfsd_net_id, 17587ea34ac1SJeff Layton .size = sizeof(struct nfsd_net), 17597ea34ac1SJeff Layton }; 17607ea34ac1SJeff Layton 17611da177e4SLinus Torvalds static int __init init_nfsd(void) 17621da177e4SLinus Torvalds { 17631da177e4SLinus Torvalds int retval; 17641da177e4SLinus Torvalds 1765bb7ffbf2SGiuseppe Cantavenera retval = nfsd4_init_slabs(); 1766bb7ffbf2SGiuseppe Cantavenera if (retval) 1767b10252c7SAlexander Sverdlin return retval; 17689cf514ccSChristoph Hellwig retval = nfsd4_init_pnfs(); 176965178db4SBryan Schumaker if (retval) 177065178db4SBryan Schumaker goto out_free_slabs; 1771e567b98cSAmir Goldstein retval = nfsd_stat_init(); /* Statistics */ 1772e567b98cSAmir Goldstein if (retval) 1773e567b98cSAmir Goldstein goto out_free_pnfs; 1774027690c7SJ. Bruce Fields retval = nfsd_drc_slab_create(); 1775027690c7SJ. Bruce Fields if (retval) 1776027690c7SJ. Bruce Fields goto out_free_stat; 17771da177e4SLinus Torvalds nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1778e331f606SJ. Bruce Fields retval = create_proc_exports_entry(); 1779e331f606SJ. Bruce Fields if (retval) 1780f69adb2fSStanislav Kinsbursky goto out_free_lockd; 1781bd5ae928SJ. Bruce Fields retval = register_pernet_subsys(&nfsd_net_ops); 1782bd5ae928SJ. Bruce Fields if (retval < 0) 17836f6f84aaSZhang Xiaoxu goto out_free_exports; 1784b10252c7SAlexander Sverdlin retval = register_cld_notifier(); 1785b10252c7SAlexander Sverdlin if (retval) 178662fdb65eSZhang Xiaoxu goto out_free_subsys; 1787d76cc46bSDai Ngo retval = nfsd4_create_laundry_wq(); 1788d76cc46bSDai Ngo if (retval) 17896f6f84aaSZhang Xiaoxu goto out_free_cld; 17906f6f84aaSZhang Xiaoxu retval = register_filesystem(&nfsd_fs_type); 17916f6f84aaSZhang Xiaoxu if (retval) 1792d76cc46bSDai Ngo goto out_free_all; 1793bd9d6a3eSLorenzo Bianconi retval = genl_register_family(&nfsd_nl_family); 1794bd9d6a3eSLorenzo Bianconi if (retval) 1795bd9d6a3eSLorenzo Bianconi goto out_free_all; 1796bd9d6a3eSLorenzo Bianconi 179726808d3fSJ. Bruce Fields return 0; 179826808d3fSJ. Bruce Fields out_free_all: 17996f6f84aaSZhang Xiaoxu nfsd4_destroy_laundry_wq(); 18006f6f84aaSZhang Xiaoxu out_free_cld: 180162fdb65eSZhang Xiaoxu unregister_cld_notifier(); 180262fdb65eSZhang Xiaoxu out_free_subsys: 1803b10252c7SAlexander Sverdlin unregister_pernet_subsys(&nfsd_net_ops); 1804bd5ae928SJ. Bruce Fields out_free_exports: 18051da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 18061da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 1807dbf847ecSJ. Bruce Fields out_free_lockd: 18081da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1809027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 1810027690c7SJ. Bruce Fields out_free_stat: 1811d5c3428bSJ. Bruce Fields nfsd_stat_shutdown(); 1812e567b98cSAmir Goldstein out_free_pnfs: 18139cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 181465178db4SBryan Schumaker out_free_slabs: 181546b25895SJ. Bruce Fields nfsd4_free_slabs(); 18161da177e4SLinus Torvalds return retval; 18171da177e4SLinus Torvalds } 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds static void __exit exit_nfsd(void) 18201da177e4SLinus Torvalds { 1821bd9d6a3eSLorenzo Bianconi genl_unregister_family(&nfsd_nl_family); 18226f6f84aaSZhang Xiaoxu unregister_filesystem(&nfsd_fs_type); 1823d76cc46bSDai Ngo nfsd4_destroy_laundry_wq(); 1824b10252c7SAlexander Sverdlin unregister_cld_notifier(); 1825bd5ae928SJ. Bruce Fields unregister_pernet_subsys(&nfsd_net_ops); 1826027690c7SJ. Bruce Fields nfsd_drc_slab_free(); 18271da177e4SLinus Torvalds remove_proc_entry("fs/nfs/exports", NULL); 18281da177e4SLinus Torvalds remove_proc_entry("fs/nfs", NULL); 18291da177e4SLinus Torvalds nfsd_stat_shutdown(); 18301da177e4SLinus Torvalds nfsd_lockd_shutdown(); 1831e8ff2a84SJ. Bruce Fields nfsd4_free_slabs(); 18329cf514ccSChristoph Hellwig nfsd4_exit_pnfs(); 18331da177e4SLinus Torvalds } 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 18365865bafaSJeff Layton MODULE_DESCRIPTION("In-kernel NFS server"); 18371da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 18381da177e4SLinus Torvalds module_init(init_nfsd) 18391da177e4SLinus Torvalds module_exit(exit_nfsd) 1840