11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/nfs/proc.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1992, 1993, 1994 Rick Sladkey 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * OS-independent nfs remote procedure call functions 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers 91da177e4SLinus Torvalds * so at last we can have decent(ish) throughput off a 101da177e4SLinus Torvalds * Sun server. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Coding optimized and cleaned up by Florian La Roche. 131da177e4SLinus Torvalds * Note: Error returns are optimized for NFS_OK, which isn't translated via 141da177e4SLinus Torvalds * nfs_stat_to_errno(), but happens to be already the right return code. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * Also, the code currently doesn't check the size of the packet, when 171da177e4SLinus Torvalds * it decodes the packet. 181da177e4SLinus Torvalds * 191da177e4SLinus Torvalds * Feel free to fix it and mail me the diffs if it worries you. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * Completely rewritten to support the new RPC call interface; 221da177e4SLinus Torvalds * rewrote and moved the entire XDR stuff to xdr.c 231da177e4SLinus Torvalds * --Olaf Kirch June 1996 241da177e4SLinus Torvalds * 251da177e4SLinus Torvalds * The code below initializes all auto variables explicitly, otherwise 261da177e4SLinus Torvalds * it will fail to work as a module (gcc generates a memset call for an 271da177e4SLinus Torvalds * incomplete struct). 281da177e4SLinus Torvalds */ 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #include <linux/types.h> 311da177e4SLinus Torvalds #include <linux/param.h> 321da177e4SLinus Torvalds #include <linux/slab.h> 331da177e4SLinus Torvalds #include <linux/time.h> 341da177e4SLinus Torvalds #include <linux/mm.h> 351da177e4SLinus Torvalds #include <linux/utsname.h> 361da177e4SLinus Torvalds #include <linux/errno.h> 371da177e4SLinus Torvalds #include <linux/string.h> 381da177e4SLinus Torvalds #include <linux/in.h> 391da177e4SLinus Torvalds #include <linux/pagemap.h> 401da177e4SLinus Torvalds #include <linux/sunrpc/clnt.h> 411da177e4SLinus Torvalds #include <linux/nfs.h> 421da177e4SLinus Torvalds #include <linux/nfs2.h> 431da177e4SLinus Torvalds #include <linux/nfs_fs.h> 441da177e4SLinus Torvalds #include <linux/nfs_page.h> 451da177e4SLinus Torvalds #include <linux/lockd/bind.h> 46f7b422b1SDavid Howells #include "internal.h" 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_PROC 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* 511da177e4SLinus Torvalds * Bare-bones access to getattr: this is for nfs_read_super. 521da177e4SLinus Torvalds */ 531da177e4SLinus Torvalds static int 541da177e4SLinus Torvalds nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 551da177e4SLinus Torvalds struct nfs_fsinfo *info) 561da177e4SLinus Torvalds { 571da177e4SLinus Torvalds struct nfs_fattr *fattr = info->fattr; 581da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 59dead28daSChuck Lever struct rpc_message msg = { 60dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 61dead28daSChuck Lever .rpc_argp = fhandle, 62dead28daSChuck Lever .rpc_resp = fattr, 63dead28daSChuck Lever }; 641da177e4SLinus Torvalds int status; 651da177e4SLinus Torvalds 663110ff80SHarvey Harrison dprintk("%s: call getattr\n", __func__); 670e574af1STrond Myklebust nfs_fattr_init(fattr); 6837ca8f5cSEG Keizer status = rpc_call_sync(server->client, &msg, 0); 6937ca8f5cSEG Keizer /* Retry with default authentication if different */ 7037ca8f5cSEG Keizer if (status && server->nfs_client->cl_rpcclient != server->client) 715006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 723110ff80SHarvey Harrison dprintk("%s: reply getattr: %d\n", __func__, status); 731da177e4SLinus Torvalds if (status) 741da177e4SLinus Torvalds return status; 753110ff80SHarvey Harrison dprintk("%s: call statfs\n", __func__); 76dead28daSChuck Lever msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 77dead28daSChuck Lever msg.rpc_resp = &fsinfo; 7837ca8f5cSEG Keizer status = rpc_call_sync(server->client, &msg, 0); 7937ca8f5cSEG Keizer /* Retry with default authentication if different */ 8037ca8f5cSEG Keizer if (status && server->nfs_client->cl_rpcclient != server->client) 815006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 823110ff80SHarvey Harrison dprintk("%s: reply statfs: %d\n", __func__, status); 831da177e4SLinus Torvalds if (status) 841da177e4SLinus Torvalds return status; 851da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 861da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 871da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 881da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 891da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 901da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 911da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 921da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 931da177e4SLinus Torvalds info->lease_time = 0; 941da177e4SLinus Torvalds return 0; 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds /* 981da177e4SLinus Torvalds * One function for each procedure in the NFS protocol. 991da177e4SLinus Torvalds */ 1001da177e4SLinus Torvalds static int 1011da177e4SLinus Torvalds nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 1021da177e4SLinus Torvalds struct nfs_fattr *fattr) 1031da177e4SLinus Torvalds { 104dead28daSChuck Lever struct rpc_message msg = { 105dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 106dead28daSChuck Lever .rpc_argp = fhandle, 107dead28daSChuck Lever .rpc_resp = fattr, 108dead28daSChuck Lever }; 1091da177e4SLinus Torvalds int status; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds dprintk("NFS call getattr\n"); 1120e574af1STrond Myklebust nfs_fattr_init(fattr); 113dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 1141da177e4SLinus Torvalds dprintk("NFS reply getattr: %d\n", status); 1151da177e4SLinus Torvalds return status; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static int 1191da177e4SLinus Torvalds nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 1201da177e4SLinus Torvalds struct iattr *sattr) 1211da177e4SLinus Torvalds { 1221da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 1231da177e4SLinus Torvalds struct nfs_sattrargs arg = { 1241da177e4SLinus Torvalds .fh = NFS_FH(inode), 1251da177e4SLinus Torvalds .sattr = sattr 1261da177e4SLinus Torvalds }; 127dead28daSChuck Lever struct rpc_message msg = { 128dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 129dead28daSChuck Lever .rpc_argp = &arg, 130dead28daSChuck Lever .rpc_resp = fattr, 131dead28daSChuck Lever }; 1321da177e4SLinus Torvalds int status; 1331da177e4SLinus Torvalds 134cf3fff54STrond Myklebust /* Mask out the non-modebit related stuff from attr->ia_mode */ 135cf3fff54STrond Myklebust sattr->ia_mode &= S_IALLUGO; 136cf3fff54STrond Myklebust 1371da177e4SLinus Torvalds dprintk("NFS call setattr\n"); 138659bfcd6STrond Myklebust if (sattr->ia_valid & ATTR_FILE) 139659bfcd6STrond Myklebust msg.rpc_cred = nfs_file_cred(sattr->ia_file); 1400e574af1STrond Myklebust nfs_fattr_init(fattr); 141dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 14265e4308dSTrond Myklebust if (status == 0) 14365e4308dSTrond Myklebust nfs_setattr_update_inode(inode, sattr); 1441da177e4SLinus Torvalds dprintk("NFS reply setattr: %d\n", status); 1451da177e4SLinus Torvalds return status; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds static int 1491da177e4SLinus Torvalds nfs_proc_lookup(struct inode *dir, struct qstr *name, 1501da177e4SLinus Torvalds struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds struct nfs_diropargs arg = { 1531da177e4SLinus Torvalds .fh = NFS_FH(dir), 1541da177e4SLinus Torvalds .name = name->name, 1551da177e4SLinus Torvalds .len = name->len 1561da177e4SLinus Torvalds }; 1571da177e4SLinus Torvalds struct nfs_diropok res = { 1581da177e4SLinus Torvalds .fh = fhandle, 1591da177e4SLinus Torvalds .fattr = fattr 1601da177e4SLinus Torvalds }; 161dead28daSChuck Lever struct rpc_message msg = { 162dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 163dead28daSChuck Lever .rpc_argp = &arg, 164dead28daSChuck Lever .rpc_resp = &res, 165dead28daSChuck Lever }; 1661da177e4SLinus Torvalds int status; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds dprintk("NFS call lookup %s\n", name->name); 1690e574af1STrond Myklebust nfs_fattr_init(fattr); 170dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 1711da177e4SLinus Torvalds dprintk("NFS reply lookup: %d\n", status); 1721da177e4SLinus Torvalds return status; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static int nfs_proc_readlink(struct inode *inode, struct page *page, 1761da177e4SLinus Torvalds unsigned int pgbase, unsigned int pglen) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds struct nfs_readlinkargs args = { 1791da177e4SLinus Torvalds .fh = NFS_FH(inode), 1801da177e4SLinus Torvalds .pgbase = pgbase, 1811da177e4SLinus Torvalds .pglen = pglen, 1821da177e4SLinus Torvalds .pages = &page 1831da177e4SLinus Torvalds }; 184dead28daSChuck Lever struct rpc_message msg = { 185dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 186dead28daSChuck Lever .rpc_argp = &args, 187dead28daSChuck Lever }; 1881da177e4SLinus Torvalds int status; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds dprintk("NFS call readlink\n"); 191dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1921da177e4SLinus Torvalds dprintk("NFS reply readlink: %d\n", status); 1931da177e4SLinus Torvalds return status; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds static int 1971da177e4SLinus Torvalds nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 19802a913a7STrond Myklebust int flags, struct nameidata *nd) 1991da177e4SLinus Torvalds { 2001da177e4SLinus Torvalds struct nfs_fh fhandle; 2011da177e4SLinus Torvalds struct nfs_fattr fattr; 2021da177e4SLinus Torvalds struct nfs_createargs arg = { 2031da177e4SLinus Torvalds .fh = NFS_FH(dir), 2041da177e4SLinus Torvalds .name = dentry->d_name.name, 2051da177e4SLinus Torvalds .len = dentry->d_name.len, 2061da177e4SLinus Torvalds .sattr = sattr 2071da177e4SLinus Torvalds }; 2081da177e4SLinus Torvalds struct nfs_diropok res = { 2091da177e4SLinus Torvalds .fh = &fhandle, 2101da177e4SLinus Torvalds .fattr = &fattr 2111da177e4SLinus Torvalds }; 212dead28daSChuck Lever struct rpc_message msg = { 213dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 214dead28daSChuck Lever .rpc_argp = &arg, 215dead28daSChuck Lever .rpc_resp = &res, 216dead28daSChuck Lever }; 2171da177e4SLinus Torvalds int status; 2181da177e4SLinus Torvalds 2190e574af1STrond Myklebust nfs_fattr_init(&fattr); 2201da177e4SLinus Torvalds dprintk("NFS call create %s\n", dentry->d_name.name); 221dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 222bad2a524STrond Myklebust nfs_mark_for_revalidate(dir); 2231da177e4SLinus Torvalds if (status == 0) 2241da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2251da177e4SLinus Torvalds dprintk("NFS reply create: %d\n", status); 2261da177e4SLinus Torvalds return status; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds /* 2301da177e4SLinus Torvalds * In NFSv2, mknod is grafted onto the create call. 2311da177e4SLinus Torvalds */ 2321da177e4SLinus Torvalds static int 2331da177e4SLinus Torvalds nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2341da177e4SLinus Torvalds dev_t rdev) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds struct nfs_fh fhandle; 2371da177e4SLinus Torvalds struct nfs_fattr fattr; 2381da177e4SLinus Torvalds struct nfs_createargs arg = { 2391da177e4SLinus Torvalds .fh = NFS_FH(dir), 2401da177e4SLinus Torvalds .name = dentry->d_name.name, 2411da177e4SLinus Torvalds .len = dentry->d_name.len, 2421da177e4SLinus Torvalds .sattr = sattr 2431da177e4SLinus Torvalds }; 2441da177e4SLinus Torvalds struct nfs_diropok res = { 2451da177e4SLinus Torvalds .fh = &fhandle, 2461da177e4SLinus Torvalds .fattr = &fattr 2471da177e4SLinus Torvalds }; 248dead28daSChuck Lever struct rpc_message msg = { 249dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 250dead28daSChuck Lever .rpc_argp = &arg, 251dead28daSChuck Lever .rpc_resp = &res, 252dead28daSChuck Lever }; 2531da177e4SLinus Torvalds int status, mode; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds dprintk("NFS call mknod %s\n", dentry->d_name.name); 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds mode = sattr->ia_mode; 2581da177e4SLinus Torvalds if (S_ISFIFO(mode)) { 2591da177e4SLinus Torvalds sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 2601da177e4SLinus Torvalds sattr->ia_valid &= ~ATTR_SIZE; 2611da177e4SLinus Torvalds } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 2621da177e4SLinus Torvalds sattr->ia_valid |= ATTR_SIZE; 2631da177e4SLinus Torvalds sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2660e574af1STrond Myklebust nfs_fattr_init(&fattr); 267dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 268decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds if (status == -EINVAL && S_ISFIFO(mode)) { 2711da177e4SLinus Torvalds sattr->ia_mode = mode; 2720e574af1STrond Myklebust nfs_fattr_init(&fattr); 273dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds if (status == 0) 2761da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2771da177e4SLinus Torvalds dprintk("NFS reply mknod: %d\n", status); 2781da177e4SLinus Torvalds return status; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds static int 2821da177e4SLinus Torvalds nfs_proc_remove(struct inode *dir, struct qstr *name) 2831da177e4SLinus Torvalds { 2844fdc17b2STrond Myklebust struct nfs_removeargs arg = { 2851da177e4SLinus Torvalds .fh = NFS_FH(dir), 2864fdc17b2STrond Myklebust .name.len = name->len, 2874fdc17b2STrond Myklebust .name.name = name->name, 2881da177e4SLinus Torvalds }; 2891da177e4SLinus Torvalds struct rpc_message msg = { 2901da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 2911da177e4SLinus Torvalds .rpc_argp = &arg, 2921da177e4SLinus Torvalds }; 2931da177e4SLinus Torvalds int status; 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds dprintk("NFS call remove %s\n", name->name); 2961da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 297decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds dprintk("NFS reply remove: %d\n", status); 3001da177e4SLinus Torvalds return status; 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 303e4eff1a6STrond Myklebust static void 304e4eff1a6STrond Myklebust nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 309e4eff1a6STrond Myklebust static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3101da177e4SLinus Torvalds { 311e4eff1a6STrond Myklebust nfs_mark_for_revalidate(dir); 312e4eff1a6STrond Myklebust return 1; 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds static int 3161da177e4SLinus Torvalds nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 3171da177e4SLinus Torvalds struct inode *new_dir, struct qstr *new_name) 3181da177e4SLinus Torvalds { 3191da177e4SLinus Torvalds struct nfs_renameargs arg = { 3201da177e4SLinus Torvalds .fromfh = NFS_FH(old_dir), 3211da177e4SLinus Torvalds .fromname = old_name->name, 3221da177e4SLinus Torvalds .fromlen = old_name->len, 3231da177e4SLinus Torvalds .tofh = NFS_FH(new_dir), 3241da177e4SLinus Torvalds .toname = new_name->name, 3251da177e4SLinus Torvalds .tolen = new_name->len 3261da177e4SLinus Torvalds }; 327dead28daSChuck Lever struct rpc_message msg = { 328dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 329dead28daSChuck Lever .rpc_argp = &arg, 330dead28daSChuck Lever }; 3311da177e4SLinus Torvalds int status; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 334dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 335decf491fSTrond Myklebust nfs_mark_for_revalidate(old_dir); 336decf491fSTrond Myklebust nfs_mark_for_revalidate(new_dir); 3371da177e4SLinus Torvalds dprintk("NFS reply rename: %d\n", status); 3381da177e4SLinus Torvalds return status; 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds static int 3421da177e4SLinus Torvalds nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds struct nfs_linkargs arg = { 3451da177e4SLinus Torvalds .fromfh = NFS_FH(inode), 3461da177e4SLinus Torvalds .tofh = NFS_FH(dir), 3471da177e4SLinus Torvalds .toname = name->name, 3481da177e4SLinus Torvalds .tolen = name->len 3491da177e4SLinus Torvalds }; 350dead28daSChuck Lever struct rpc_message msg = { 351dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LINK], 352dead28daSChuck Lever .rpc_argp = &arg, 353dead28daSChuck Lever }; 3541da177e4SLinus Torvalds int status; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds dprintk("NFS call link %s\n", name->name); 357dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 3585ba7cc48STrond Myklebust nfs_mark_for_revalidate(inode); 359decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3601da177e4SLinus Torvalds dprintk("NFS reply link: %d\n", status); 3611da177e4SLinus Torvalds return status; 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds static int 36594a6d753SChuck Lever nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 36694a6d753SChuck Lever unsigned int len, struct iattr *sattr) 3671da177e4SLinus Torvalds { 3684f390c15SChuck Lever struct nfs_fh fhandle; 3694f390c15SChuck Lever struct nfs_fattr fattr; 3701da177e4SLinus Torvalds struct nfs_symlinkargs arg = { 3711da177e4SLinus Torvalds .fromfh = NFS_FH(dir), 3724f390c15SChuck Lever .fromname = dentry->d_name.name, 3734f390c15SChuck Lever .fromlen = dentry->d_name.len, 37494a6d753SChuck Lever .pages = &page, 37594a6d753SChuck Lever .pathlen = len, 3761da177e4SLinus Torvalds .sattr = sattr 3771da177e4SLinus Torvalds }; 378dead28daSChuck Lever struct rpc_message msg = { 379dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 380dead28daSChuck Lever .rpc_argp = &arg, 381dead28daSChuck Lever }; 3821da177e4SLinus Torvalds int status; 3831da177e4SLinus Torvalds 38494a6d753SChuck Lever if (len > NFS2_MAXPATHLEN) 3851da177e4SLinus Torvalds return -ENAMETOOLONG; 3864f390c15SChuck Lever 38794a6d753SChuck Lever dprintk("NFS call symlink %s\n", dentry->d_name.name); 38894a6d753SChuck Lever 389dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 390decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3914f390c15SChuck Lever 3924f390c15SChuck Lever /* 3934f390c15SChuck Lever * V2 SYMLINK requests don't return any attributes. Setting the 3944f390c15SChuck Lever * filehandle size to zero indicates to nfs_instantiate that it 3954f390c15SChuck Lever * should fill in the data with a LOOKUP call on the wire. 3964f390c15SChuck Lever */ 3974f390c15SChuck Lever if (status == 0) { 3984f390c15SChuck Lever nfs_fattr_init(&fattr); 3994f390c15SChuck Lever fhandle.size = 0; 4004f390c15SChuck Lever status = nfs_instantiate(dentry, &fhandle, &fattr); 4014f390c15SChuck Lever } 4024f390c15SChuck Lever 4031da177e4SLinus Torvalds dprintk("NFS reply symlink: %d\n", status); 4041da177e4SLinus Torvalds return status; 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds static int 4081da177e4SLinus Torvalds nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 4091da177e4SLinus Torvalds { 4101da177e4SLinus Torvalds struct nfs_fh fhandle; 4111da177e4SLinus Torvalds struct nfs_fattr fattr; 4121da177e4SLinus Torvalds struct nfs_createargs arg = { 4131da177e4SLinus Torvalds .fh = NFS_FH(dir), 4141da177e4SLinus Torvalds .name = dentry->d_name.name, 4151da177e4SLinus Torvalds .len = dentry->d_name.len, 4161da177e4SLinus Torvalds .sattr = sattr 4171da177e4SLinus Torvalds }; 4181da177e4SLinus Torvalds struct nfs_diropok res = { 4191da177e4SLinus Torvalds .fh = &fhandle, 4201da177e4SLinus Torvalds .fattr = &fattr 4211da177e4SLinus Torvalds }; 422dead28daSChuck Lever struct rpc_message msg = { 423dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 424dead28daSChuck Lever .rpc_argp = &arg, 425dead28daSChuck Lever .rpc_resp = &res, 426dead28daSChuck Lever }; 4271da177e4SLinus Torvalds int status; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds dprintk("NFS call mkdir %s\n", dentry->d_name.name); 4300e574af1STrond Myklebust nfs_fattr_init(&fattr); 431dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 432decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4331da177e4SLinus Torvalds if (status == 0) 4341da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 4351da177e4SLinus Torvalds dprintk("NFS reply mkdir: %d\n", status); 4361da177e4SLinus Torvalds return status; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds static int 4401da177e4SLinus Torvalds nfs_proc_rmdir(struct inode *dir, struct qstr *name) 4411da177e4SLinus Torvalds { 4421da177e4SLinus Torvalds struct nfs_diropargs arg = { 4431da177e4SLinus Torvalds .fh = NFS_FH(dir), 4441da177e4SLinus Torvalds .name = name->name, 4451da177e4SLinus Torvalds .len = name->len 4461da177e4SLinus Torvalds }; 447dead28daSChuck Lever struct rpc_message msg = { 448dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 449dead28daSChuck Lever .rpc_argp = &arg, 450dead28daSChuck Lever }; 4511da177e4SLinus Torvalds int status; 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds dprintk("NFS call rmdir %s\n", name->name); 454dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 455decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4561da177e4SLinus Torvalds dprintk("NFS reply rmdir: %d\n", status); 4571da177e4SLinus Torvalds return status; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds /* 4611da177e4SLinus Torvalds * The READDIR implementation is somewhat hackish - we pass a temporary 4621da177e4SLinus Torvalds * buffer to the encode function, which installs it in the receive 4631da177e4SLinus Torvalds * the receive iovec. The decode function just parses the reply to make 4641da177e4SLinus Torvalds * sure it is syntactically correct; the entries itself are decoded 4651da177e4SLinus Torvalds * from nfs_readdir by calling the decode_entry function directly. 4661da177e4SLinus Torvalds */ 4671da177e4SLinus Torvalds static int 4681da177e4SLinus Torvalds nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4691da177e4SLinus Torvalds u64 cookie, struct page *page, unsigned int count, int plus) 4701da177e4SLinus Torvalds { 4711da177e4SLinus Torvalds struct inode *dir = dentry->d_inode; 4721da177e4SLinus Torvalds struct nfs_readdirargs arg = { 4731da177e4SLinus Torvalds .fh = NFS_FH(dir), 4741da177e4SLinus Torvalds .cookie = cookie, 4751da177e4SLinus Torvalds .count = count, 476dead28daSChuck Lever .pages = &page, 4771da177e4SLinus Torvalds }; 4781da177e4SLinus Torvalds struct rpc_message msg = { 4791da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 4801da177e4SLinus Torvalds .rpc_argp = &arg, 481dead28daSChuck Lever .rpc_cred = cred, 4821da177e4SLinus Torvalds }; 4831da177e4SLinus Torvalds int status; 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds dprintk("NFS call readdir %d\n", (unsigned int)cookie); 4861da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 4871da177e4SLinus Torvalds 488c4812998STrond Myklebust nfs_invalidate_atime(dir); 489c4812998STrond Myklebust 4901da177e4SLinus Torvalds dprintk("NFS reply readdir: %d\n", status); 4911da177e4SLinus Torvalds return status; 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds static int 4951da177e4SLinus Torvalds nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4961da177e4SLinus Torvalds struct nfs_fsstat *stat) 4971da177e4SLinus Torvalds { 4981da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 499dead28daSChuck Lever struct rpc_message msg = { 500dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 501dead28daSChuck Lever .rpc_argp = fhandle, 502dead28daSChuck Lever .rpc_resp = &fsinfo, 503dead28daSChuck Lever }; 5041da177e4SLinus Torvalds int status; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds dprintk("NFS call statfs\n"); 5070e574af1STrond Myklebust nfs_fattr_init(stat->fattr); 508dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5091da177e4SLinus Torvalds dprintk("NFS reply statfs: %d\n", status); 5101da177e4SLinus Torvalds if (status) 5111da177e4SLinus Torvalds goto out; 5121da177e4SLinus Torvalds stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 5131da177e4SLinus Torvalds stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 5141da177e4SLinus Torvalds stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 5151da177e4SLinus Torvalds stat->tfiles = 0; 5161da177e4SLinus Torvalds stat->ffiles = 0; 5171da177e4SLinus Torvalds stat->afiles = 0; 5181da177e4SLinus Torvalds out: 5191da177e4SLinus Torvalds return status; 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds static int 5231da177e4SLinus Torvalds nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5241da177e4SLinus Torvalds struct nfs_fsinfo *info) 5251da177e4SLinus Torvalds { 5261da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 527dead28daSChuck Lever struct rpc_message msg = { 528dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 529dead28daSChuck Lever .rpc_argp = fhandle, 530dead28daSChuck Lever .rpc_resp = &fsinfo, 531dead28daSChuck Lever }; 5321da177e4SLinus Torvalds int status; 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds dprintk("NFS call fsinfo\n"); 5350e574af1STrond Myklebust nfs_fattr_init(info->fattr); 536dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5371da177e4SLinus Torvalds dprintk("NFS reply fsinfo: %d\n", status); 5381da177e4SLinus Torvalds if (status) 5391da177e4SLinus Torvalds goto out; 5401da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 5411da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 5421da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 5431da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 5441da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 5451da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 5461da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 5471da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 5481da177e4SLinus Torvalds info->lease_time = 0; 5491da177e4SLinus Torvalds out: 5501da177e4SLinus Torvalds return status; 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds static int 5541da177e4SLinus Torvalds nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5551da177e4SLinus Torvalds struct nfs_pathconf *info) 5561da177e4SLinus Torvalds { 5571da177e4SLinus Torvalds info->max_link = 0; 5581da177e4SLinus Torvalds info->max_namelen = NFS2_MAXNAMLEN; 5591da177e4SLinus Torvalds return 0; 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds 562ec06c096STrond Myklebust static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 5631da177e4SLinus Torvalds { 5648850df99STrond Myklebust nfs_invalidate_atime(data->inode); 5651da177e4SLinus Torvalds if (task->tk_status >= 0) { 5661da177e4SLinus Torvalds nfs_refresh_inode(data->inode, data->res.fattr); 5671da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 5681da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 5691da177e4SLinus Torvalds */ 5701da177e4SLinus Torvalds if (data->args.offset + data->args.count >= data->res.fattr->size) 5711da177e4SLinus Torvalds data->res.eof = 1; 5721da177e4SLinus Torvalds } 573ec06c096STrond Myklebust return 0; 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds 576bdc7f021STrond Myklebust static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 5771da177e4SLinus Torvalds { 578bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds 581788e7a89STrond Myklebust static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 5821da177e4SLinus Torvalds { 5831da177e4SLinus Torvalds if (task->tk_status >= 0) 58470ca8852STrond Myklebust nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); 585788e7a89STrond Myklebust return 0; 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds 588bdc7f021STrond Myklebust static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 5891da177e4SLinus Torvalds { 5901da177e4SLinus Torvalds /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 5911da177e4SLinus Torvalds data->args.stable = NFS_FILE_SYNC; 592bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static void 596bdc7f021STrond Myklebust nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 5971da177e4SLinus Torvalds { 5981da177e4SLinus Torvalds BUG(); 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds static int 6021da177e4SLinus Torvalds nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 6031da177e4SLinus Torvalds { 6041093a60eSChuck Lever struct inode *inode = filp->f_path.dentry->d_inode; 6051093a60eSChuck Lever 6061093a60eSChuck Lever return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 6092116271aSTrond Myklebust /* Helper functions for NFS lock bounds checking */ 6102116271aSTrond Myklebust #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 6112116271aSTrond Myklebust static int nfs_lock_check_bounds(const struct file_lock *fl) 6122116271aSTrond Myklebust { 6132116271aSTrond Myklebust __s32 start, end; 6142116271aSTrond Myklebust 6152116271aSTrond Myklebust start = (__s32)fl->fl_start; 6162116271aSTrond Myklebust if ((loff_t)start != fl->fl_start) 6172116271aSTrond Myklebust goto out_einval; 6182116271aSTrond Myklebust 6192116271aSTrond Myklebust if (fl->fl_end != OFFSET_MAX) { 6202116271aSTrond Myklebust end = (__s32)fl->fl_end; 6212116271aSTrond Myklebust if ((loff_t)end != fl->fl_end) 6222116271aSTrond Myklebust goto out_einval; 6232116271aSTrond Myklebust } else 6242116271aSTrond Myklebust end = NFS_LOCK32_OFFSET_MAX; 6252116271aSTrond Myklebust 6262116271aSTrond Myklebust if (start < 0 || start > end) 6272116271aSTrond Myklebust goto out_einval; 6282116271aSTrond Myklebust return 0; 6292116271aSTrond Myklebust out_einval: 6302116271aSTrond Myklebust return -EINVAL; 6312116271aSTrond Myklebust } 6321da177e4SLinus Torvalds 633509de811SDavid Howells const struct nfs_rpc_ops nfs_v2_clientops = { 6341da177e4SLinus Torvalds .version = 2, /* protocol version */ 6351da177e4SLinus Torvalds .dentry_ops = &nfs_dentry_operations, 6361da177e4SLinus Torvalds .dir_inode_ops = &nfs_dir_inode_operations, 63792cfc62cSJ. Bruce Fields .file_inode_ops = &nfs_file_inode_operations, 6381da177e4SLinus Torvalds .getroot = nfs_proc_get_root, 6391da177e4SLinus Torvalds .getattr = nfs_proc_getattr, 6401da177e4SLinus Torvalds .setattr = nfs_proc_setattr, 6411da177e4SLinus Torvalds .lookup = nfs_proc_lookup, 6421da177e4SLinus Torvalds .access = NULL, /* access */ 6431da177e4SLinus Torvalds .readlink = nfs_proc_readlink, 6441da177e4SLinus Torvalds .create = nfs_proc_create, 6451da177e4SLinus Torvalds .remove = nfs_proc_remove, 6461da177e4SLinus Torvalds .unlink_setup = nfs_proc_unlink_setup, 6471da177e4SLinus Torvalds .unlink_done = nfs_proc_unlink_done, 6481da177e4SLinus Torvalds .rename = nfs_proc_rename, 6491da177e4SLinus Torvalds .link = nfs_proc_link, 6501da177e4SLinus Torvalds .symlink = nfs_proc_symlink, 6511da177e4SLinus Torvalds .mkdir = nfs_proc_mkdir, 6521da177e4SLinus Torvalds .rmdir = nfs_proc_rmdir, 6531da177e4SLinus Torvalds .readdir = nfs_proc_readdir, 6541da177e4SLinus Torvalds .mknod = nfs_proc_mknod, 6551da177e4SLinus Torvalds .statfs = nfs_proc_statfs, 6561da177e4SLinus Torvalds .fsinfo = nfs_proc_fsinfo, 6571da177e4SLinus Torvalds .pathconf = nfs_proc_pathconf, 6581da177e4SLinus Torvalds .decode_dirent = nfs_decode_dirent, 6591da177e4SLinus Torvalds .read_setup = nfs_proc_read_setup, 660ec06c096STrond Myklebust .read_done = nfs_read_done, 6611da177e4SLinus Torvalds .write_setup = nfs_proc_write_setup, 662788e7a89STrond Myklebust .write_done = nfs_write_done, 6631da177e4SLinus Torvalds .commit_setup = nfs_proc_commit_setup, 6641da177e4SLinus Torvalds .lock = nfs_proc_lock, 6652116271aSTrond Myklebust .lock_check_bounds = nfs_lock_check_bounds, 6661da177e4SLinus Torvalds }; 667