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); 685006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 693110ff80SHarvey Harrison dprintk("%s: reply getattr: %d\n", __func__, status); 701da177e4SLinus Torvalds if (status) 711da177e4SLinus Torvalds return status; 723110ff80SHarvey Harrison dprintk("%s: call statfs\n", __func__); 73dead28daSChuck Lever msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 74dead28daSChuck Lever msg.rpc_resp = &fsinfo; 755006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 763110ff80SHarvey Harrison dprintk("%s: reply statfs: %d\n", __func__, status); 771da177e4SLinus Torvalds if (status) 781da177e4SLinus Torvalds return status; 791da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 801da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 811da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 821da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 831da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 841da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 851da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 861da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 871da177e4SLinus Torvalds info->lease_time = 0; 881da177e4SLinus Torvalds return 0; 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds /* 921da177e4SLinus Torvalds * One function for each procedure in the NFS protocol. 931da177e4SLinus Torvalds */ 941da177e4SLinus Torvalds static int 951da177e4SLinus Torvalds nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 961da177e4SLinus Torvalds struct nfs_fattr *fattr) 971da177e4SLinus Torvalds { 98dead28daSChuck Lever struct rpc_message msg = { 99dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 100dead28daSChuck Lever .rpc_argp = fhandle, 101dead28daSChuck Lever .rpc_resp = fattr, 102dead28daSChuck Lever }; 1031da177e4SLinus Torvalds int status; 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds dprintk("NFS call getattr\n"); 1060e574af1STrond Myklebust nfs_fattr_init(fattr); 107dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 1081da177e4SLinus Torvalds dprintk("NFS reply getattr: %d\n", status); 1091da177e4SLinus Torvalds return status; 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds static int 1131da177e4SLinus Torvalds nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 1141da177e4SLinus Torvalds struct iattr *sattr) 1151da177e4SLinus Torvalds { 1161da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 1171da177e4SLinus Torvalds struct nfs_sattrargs arg = { 1181da177e4SLinus Torvalds .fh = NFS_FH(inode), 1191da177e4SLinus Torvalds .sattr = sattr 1201da177e4SLinus Torvalds }; 121dead28daSChuck Lever struct rpc_message msg = { 122dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 123dead28daSChuck Lever .rpc_argp = &arg, 124dead28daSChuck Lever .rpc_resp = fattr, 125dead28daSChuck Lever }; 1261da177e4SLinus Torvalds int status; 1271da177e4SLinus Torvalds 128cf3fff54STrond Myklebust /* Mask out the non-modebit related stuff from attr->ia_mode */ 129cf3fff54STrond Myklebust sattr->ia_mode &= S_IALLUGO; 130cf3fff54STrond Myklebust 1311da177e4SLinus Torvalds dprintk("NFS call setattr\n"); 132659bfcd6STrond Myklebust if (sattr->ia_valid & ATTR_FILE) 133659bfcd6STrond Myklebust msg.rpc_cred = nfs_file_cred(sattr->ia_file); 1340e574af1STrond Myklebust nfs_fattr_init(fattr); 135dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 13665e4308dSTrond Myklebust if (status == 0) 13765e4308dSTrond Myklebust nfs_setattr_update_inode(inode, sattr); 1381da177e4SLinus Torvalds dprintk("NFS reply setattr: %d\n", status); 1391da177e4SLinus Torvalds return status; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static int 1431da177e4SLinus Torvalds nfs_proc_lookup(struct inode *dir, struct qstr *name, 1441da177e4SLinus Torvalds struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds struct nfs_diropargs arg = { 1471da177e4SLinus Torvalds .fh = NFS_FH(dir), 1481da177e4SLinus Torvalds .name = name->name, 1491da177e4SLinus Torvalds .len = name->len 1501da177e4SLinus Torvalds }; 1511da177e4SLinus Torvalds struct nfs_diropok res = { 1521da177e4SLinus Torvalds .fh = fhandle, 1531da177e4SLinus Torvalds .fattr = fattr 1541da177e4SLinus Torvalds }; 155dead28daSChuck Lever struct rpc_message msg = { 156dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 157dead28daSChuck Lever .rpc_argp = &arg, 158dead28daSChuck Lever .rpc_resp = &res, 159dead28daSChuck Lever }; 1601da177e4SLinus Torvalds int status; 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds dprintk("NFS call lookup %s\n", name->name); 1630e574af1STrond Myklebust nfs_fattr_init(fattr); 164dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 1651da177e4SLinus Torvalds dprintk("NFS reply lookup: %d\n", status); 1661da177e4SLinus Torvalds return status; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static int nfs_proc_readlink(struct inode *inode, struct page *page, 1701da177e4SLinus Torvalds unsigned int pgbase, unsigned int pglen) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds struct nfs_readlinkargs args = { 1731da177e4SLinus Torvalds .fh = NFS_FH(inode), 1741da177e4SLinus Torvalds .pgbase = pgbase, 1751da177e4SLinus Torvalds .pglen = pglen, 1761da177e4SLinus Torvalds .pages = &page 1771da177e4SLinus Torvalds }; 178dead28daSChuck Lever struct rpc_message msg = { 179dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 180dead28daSChuck Lever .rpc_argp = &args, 181dead28daSChuck Lever }; 1821da177e4SLinus Torvalds int status; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds dprintk("NFS call readlink\n"); 185dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1861da177e4SLinus Torvalds dprintk("NFS reply readlink: %d\n", status); 1871da177e4SLinus Torvalds return status; 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds static int 1911da177e4SLinus Torvalds nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 19202a913a7STrond Myklebust int flags, struct nameidata *nd) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds struct nfs_fh fhandle; 1951da177e4SLinus Torvalds struct nfs_fattr fattr; 1961da177e4SLinus Torvalds struct nfs_createargs arg = { 1971da177e4SLinus Torvalds .fh = NFS_FH(dir), 1981da177e4SLinus Torvalds .name = dentry->d_name.name, 1991da177e4SLinus Torvalds .len = dentry->d_name.len, 2001da177e4SLinus Torvalds .sattr = sattr 2011da177e4SLinus Torvalds }; 2021da177e4SLinus Torvalds struct nfs_diropok res = { 2031da177e4SLinus Torvalds .fh = &fhandle, 2041da177e4SLinus Torvalds .fattr = &fattr 2051da177e4SLinus Torvalds }; 206dead28daSChuck Lever struct rpc_message msg = { 207dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 208dead28daSChuck Lever .rpc_argp = &arg, 209dead28daSChuck Lever .rpc_resp = &res, 210dead28daSChuck Lever }; 2111da177e4SLinus Torvalds int status; 2121da177e4SLinus Torvalds 2130e574af1STrond Myklebust nfs_fattr_init(&fattr); 2141da177e4SLinus Torvalds dprintk("NFS call create %s\n", dentry->d_name.name); 215dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 216bad2a524STrond Myklebust nfs_mark_for_revalidate(dir); 2171da177e4SLinus Torvalds if (status == 0) 2181da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2191da177e4SLinus Torvalds dprintk("NFS reply create: %d\n", status); 2201da177e4SLinus Torvalds return status; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds /* 2241da177e4SLinus Torvalds * In NFSv2, mknod is grafted onto the create call. 2251da177e4SLinus Torvalds */ 2261da177e4SLinus Torvalds static int 2271da177e4SLinus Torvalds nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2281da177e4SLinus Torvalds dev_t rdev) 2291da177e4SLinus Torvalds { 2301da177e4SLinus Torvalds struct nfs_fh fhandle; 2311da177e4SLinus Torvalds struct nfs_fattr fattr; 2321da177e4SLinus Torvalds struct nfs_createargs arg = { 2331da177e4SLinus Torvalds .fh = NFS_FH(dir), 2341da177e4SLinus Torvalds .name = dentry->d_name.name, 2351da177e4SLinus Torvalds .len = dentry->d_name.len, 2361da177e4SLinus Torvalds .sattr = sattr 2371da177e4SLinus Torvalds }; 2381da177e4SLinus Torvalds struct nfs_diropok res = { 2391da177e4SLinus Torvalds .fh = &fhandle, 2401da177e4SLinus Torvalds .fattr = &fattr 2411da177e4SLinus Torvalds }; 242dead28daSChuck Lever struct rpc_message msg = { 243dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 244dead28daSChuck Lever .rpc_argp = &arg, 245dead28daSChuck Lever .rpc_resp = &res, 246dead28daSChuck Lever }; 2471da177e4SLinus Torvalds int status, mode; 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds dprintk("NFS call mknod %s\n", dentry->d_name.name); 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds mode = sattr->ia_mode; 2521da177e4SLinus Torvalds if (S_ISFIFO(mode)) { 2531da177e4SLinus Torvalds sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 2541da177e4SLinus Torvalds sattr->ia_valid &= ~ATTR_SIZE; 2551da177e4SLinus Torvalds } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 2561da177e4SLinus Torvalds sattr->ia_valid |= ATTR_SIZE; 2571da177e4SLinus Torvalds sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 2600e574af1STrond Myklebust nfs_fattr_init(&fattr); 261dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 262decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds if (status == -EINVAL && S_ISFIFO(mode)) { 2651da177e4SLinus Torvalds sattr->ia_mode = mode; 2660e574af1STrond Myklebust nfs_fattr_init(&fattr); 267dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2681da177e4SLinus Torvalds } 2691da177e4SLinus Torvalds if (status == 0) 2701da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2711da177e4SLinus Torvalds dprintk("NFS reply mknod: %d\n", status); 2721da177e4SLinus Torvalds return status; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds static int 2761da177e4SLinus Torvalds nfs_proc_remove(struct inode *dir, struct qstr *name) 2771da177e4SLinus Torvalds { 2784fdc17b2STrond Myklebust struct nfs_removeargs arg = { 2791da177e4SLinus Torvalds .fh = NFS_FH(dir), 2804fdc17b2STrond Myklebust .name.len = name->len, 2814fdc17b2STrond Myklebust .name.name = name->name, 2821da177e4SLinus Torvalds }; 2831da177e4SLinus Torvalds struct rpc_message msg = { 2841da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 2851da177e4SLinus Torvalds .rpc_argp = &arg, 2861da177e4SLinus Torvalds }; 2871da177e4SLinus Torvalds int status; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds dprintk("NFS call remove %s\n", name->name); 2901da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 291decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds dprintk("NFS reply remove: %d\n", status); 2941da177e4SLinus Torvalds return status; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds 297e4eff1a6STrond Myklebust static void 298e4eff1a6STrond Myklebust nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 303e4eff1a6STrond Myklebust static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3041da177e4SLinus Torvalds { 305e4eff1a6STrond Myklebust nfs_mark_for_revalidate(dir); 306e4eff1a6STrond Myklebust return 1; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds static int 3101da177e4SLinus Torvalds nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 3111da177e4SLinus Torvalds struct inode *new_dir, struct qstr *new_name) 3121da177e4SLinus Torvalds { 3131da177e4SLinus Torvalds struct nfs_renameargs arg = { 3141da177e4SLinus Torvalds .fromfh = NFS_FH(old_dir), 3151da177e4SLinus Torvalds .fromname = old_name->name, 3161da177e4SLinus Torvalds .fromlen = old_name->len, 3171da177e4SLinus Torvalds .tofh = NFS_FH(new_dir), 3181da177e4SLinus Torvalds .toname = new_name->name, 3191da177e4SLinus Torvalds .tolen = new_name->len 3201da177e4SLinus Torvalds }; 321dead28daSChuck Lever struct rpc_message msg = { 322dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 323dead28daSChuck Lever .rpc_argp = &arg, 324dead28daSChuck Lever }; 3251da177e4SLinus Torvalds int status; 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 328dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 329decf491fSTrond Myklebust nfs_mark_for_revalidate(old_dir); 330decf491fSTrond Myklebust nfs_mark_for_revalidate(new_dir); 3311da177e4SLinus Torvalds dprintk("NFS reply rename: %d\n", status); 3321da177e4SLinus Torvalds return status; 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds static int 3361da177e4SLinus Torvalds nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3371da177e4SLinus Torvalds { 3381da177e4SLinus Torvalds struct nfs_linkargs arg = { 3391da177e4SLinus Torvalds .fromfh = NFS_FH(inode), 3401da177e4SLinus Torvalds .tofh = NFS_FH(dir), 3411da177e4SLinus Torvalds .toname = name->name, 3421da177e4SLinus Torvalds .tolen = name->len 3431da177e4SLinus Torvalds }; 344dead28daSChuck Lever struct rpc_message msg = { 345dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LINK], 346dead28daSChuck Lever .rpc_argp = &arg, 347dead28daSChuck Lever }; 3481da177e4SLinus Torvalds int status; 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds dprintk("NFS call link %s\n", name->name); 351dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 3525ba7cc48STrond Myklebust nfs_mark_for_revalidate(inode); 353decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3541da177e4SLinus Torvalds dprintk("NFS reply link: %d\n", status); 3551da177e4SLinus Torvalds return status; 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds static int 35994a6d753SChuck Lever nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 36094a6d753SChuck Lever unsigned int len, struct iattr *sattr) 3611da177e4SLinus Torvalds { 3624f390c15SChuck Lever struct nfs_fh fhandle; 3634f390c15SChuck Lever struct nfs_fattr fattr; 3641da177e4SLinus Torvalds struct nfs_symlinkargs arg = { 3651da177e4SLinus Torvalds .fromfh = NFS_FH(dir), 3664f390c15SChuck Lever .fromname = dentry->d_name.name, 3674f390c15SChuck Lever .fromlen = dentry->d_name.len, 36894a6d753SChuck Lever .pages = &page, 36994a6d753SChuck Lever .pathlen = len, 3701da177e4SLinus Torvalds .sattr = sattr 3711da177e4SLinus Torvalds }; 372dead28daSChuck Lever struct rpc_message msg = { 373dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 374dead28daSChuck Lever .rpc_argp = &arg, 375dead28daSChuck Lever }; 3761da177e4SLinus Torvalds int status; 3771da177e4SLinus Torvalds 37894a6d753SChuck Lever if (len > NFS2_MAXPATHLEN) 3791da177e4SLinus Torvalds return -ENAMETOOLONG; 3804f390c15SChuck Lever 38194a6d753SChuck Lever dprintk("NFS call symlink %s\n", dentry->d_name.name); 38294a6d753SChuck Lever 383dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 384decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3854f390c15SChuck Lever 3864f390c15SChuck Lever /* 3874f390c15SChuck Lever * V2 SYMLINK requests don't return any attributes. Setting the 3884f390c15SChuck Lever * filehandle size to zero indicates to nfs_instantiate that it 3894f390c15SChuck Lever * should fill in the data with a LOOKUP call on the wire. 3904f390c15SChuck Lever */ 3914f390c15SChuck Lever if (status == 0) { 3924f390c15SChuck Lever nfs_fattr_init(&fattr); 3934f390c15SChuck Lever fhandle.size = 0; 3944f390c15SChuck Lever status = nfs_instantiate(dentry, &fhandle, &fattr); 3954f390c15SChuck Lever } 3964f390c15SChuck Lever 3971da177e4SLinus Torvalds dprintk("NFS reply symlink: %d\n", status); 3981da177e4SLinus Torvalds return status; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds static int 4021da177e4SLinus Torvalds nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 4031da177e4SLinus Torvalds { 4041da177e4SLinus Torvalds struct nfs_fh fhandle; 4051da177e4SLinus Torvalds struct nfs_fattr fattr; 4061da177e4SLinus Torvalds struct nfs_createargs arg = { 4071da177e4SLinus Torvalds .fh = NFS_FH(dir), 4081da177e4SLinus Torvalds .name = dentry->d_name.name, 4091da177e4SLinus Torvalds .len = dentry->d_name.len, 4101da177e4SLinus Torvalds .sattr = sattr 4111da177e4SLinus Torvalds }; 4121da177e4SLinus Torvalds struct nfs_diropok res = { 4131da177e4SLinus Torvalds .fh = &fhandle, 4141da177e4SLinus Torvalds .fattr = &fattr 4151da177e4SLinus Torvalds }; 416dead28daSChuck Lever struct rpc_message msg = { 417dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 418dead28daSChuck Lever .rpc_argp = &arg, 419dead28daSChuck Lever .rpc_resp = &res, 420dead28daSChuck Lever }; 4211da177e4SLinus Torvalds int status; 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds dprintk("NFS call mkdir %s\n", dentry->d_name.name); 4240e574af1STrond Myklebust nfs_fattr_init(&fattr); 425dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 426decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4271da177e4SLinus Torvalds if (status == 0) 4281da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 4291da177e4SLinus Torvalds dprintk("NFS reply mkdir: %d\n", status); 4301da177e4SLinus Torvalds return status; 4311da177e4SLinus Torvalds } 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds static int 4341da177e4SLinus Torvalds nfs_proc_rmdir(struct inode *dir, struct qstr *name) 4351da177e4SLinus Torvalds { 4361da177e4SLinus Torvalds struct nfs_diropargs arg = { 4371da177e4SLinus Torvalds .fh = NFS_FH(dir), 4381da177e4SLinus Torvalds .name = name->name, 4391da177e4SLinus Torvalds .len = name->len 4401da177e4SLinus Torvalds }; 441dead28daSChuck Lever struct rpc_message msg = { 442dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 443dead28daSChuck Lever .rpc_argp = &arg, 444dead28daSChuck Lever }; 4451da177e4SLinus Torvalds int status; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds dprintk("NFS call rmdir %s\n", name->name); 448dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 449decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4501da177e4SLinus Torvalds dprintk("NFS reply rmdir: %d\n", status); 4511da177e4SLinus Torvalds return status; 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds /* 4551da177e4SLinus Torvalds * The READDIR implementation is somewhat hackish - we pass a temporary 4561da177e4SLinus Torvalds * buffer to the encode function, which installs it in the receive 4571da177e4SLinus Torvalds * the receive iovec. The decode function just parses the reply to make 4581da177e4SLinus Torvalds * sure it is syntactically correct; the entries itself are decoded 4591da177e4SLinus Torvalds * from nfs_readdir by calling the decode_entry function directly. 4601da177e4SLinus Torvalds */ 4611da177e4SLinus Torvalds static int 4621da177e4SLinus Torvalds nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4631da177e4SLinus Torvalds u64 cookie, struct page *page, unsigned int count, int plus) 4641da177e4SLinus Torvalds { 4651da177e4SLinus Torvalds struct inode *dir = dentry->d_inode; 4661da177e4SLinus Torvalds struct nfs_readdirargs arg = { 4671da177e4SLinus Torvalds .fh = NFS_FH(dir), 4681da177e4SLinus Torvalds .cookie = cookie, 4691da177e4SLinus Torvalds .count = count, 470dead28daSChuck Lever .pages = &page, 4711da177e4SLinus Torvalds }; 4721da177e4SLinus Torvalds struct rpc_message msg = { 4731da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 4741da177e4SLinus Torvalds .rpc_argp = &arg, 475dead28daSChuck Lever .rpc_cred = cred, 4761da177e4SLinus Torvalds }; 4771da177e4SLinus Torvalds int status; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds dprintk("NFS call readdir %d\n", (unsigned int)cookie); 4801da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 4811da177e4SLinus Torvalds 482c4812998STrond Myklebust nfs_invalidate_atime(dir); 483c4812998STrond Myklebust 4841da177e4SLinus Torvalds dprintk("NFS reply readdir: %d\n", status); 4851da177e4SLinus Torvalds return status; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds static int 4891da177e4SLinus Torvalds nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4901da177e4SLinus Torvalds struct nfs_fsstat *stat) 4911da177e4SLinus Torvalds { 4921da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 493dead28daSChuck Lever struct rpc_message msg = { 494dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 495dead28daSChuck Lever .rpc_argp = fhandle, 496dead28daSChuck Lever .rpc_resp = &fsinfo, 497dead28daSChuck Lever }; 4981da177e4SLinus Torvalds int status; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds dprintk("NFS call statfs\n"); 5010e574af1STrond Myklebust nfs_fattr_init(stat->fattr); 502dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5031da177e4SLinus Torvalds dprintk("NFS reply statfs: %d\n", status); 5041da177e4SLinus Torvalds if (status) 5051da177e4SLinus Torvalds goto out; 5061da177e4SLinus Torvalds stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 5071da177e4SLinus Torvalds stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 5081da177e4SLinus Torvalds stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 5091da177e4SLinus Torvalds stat->tfiles = 0; 5101da177e4SLinus Torvalds stat->ffiles = 0; 5111da177e4SLinus Torvalds stat->afiles = 0; 5121da177e4SLinus Torvalds out: 5131da177e4SLinus Torvalds return status; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds static int 5171da177e4SLinus Torvalds nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5181da177e4SLinus Torvalds struct nfs_fsinfo *info) 5191da177e4SLinus Torvalds { 5201da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 521dead28daSChuck Lever struct rpc_message msg = { 522dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 523dead28daSChuck Lever .rpc_argp = fhandle, 524dead28daSChuck Lever .rpc_resp = &fsinfo, 525dead28daSChuck Lever }; 5261da177e4SLinus Torvalds int status; 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds dprintk("NFS call fsinfo\n"); 5290e574af1STrond Myklebust nfs_fattr_init(info->fattr); 530dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5311da177e4SLinus Torvalds dprintk("NFS reply fsinfo: %d\n", status); 5321da177e4SLinus Torvalds if (status) 5331da177e4SLinus Torvalds goto out; 5341da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 5351da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 5361da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 5371da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 5381da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 5391da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 5401da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 5411da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 5421da177e4SLinus Torvalds info->lease_time = 0; 5431da177e4SLinus Torvalds out: 5441da177e4SLinus Torvalds return status; 5451da177e4SLinus Torvalds } 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds static int 5481da177e4SLinus Torvalds nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5491da177e4SLinus Torvalds struct nfs_pathconf *info) 5501da177e4SLinus Torvalds { 5511da177e4SLinus Torvalds info->max_link = 0; 5521da177e4SLinus Torvalds info->max_namelen = NFS2_MAXNAMLEN; 5531da177e4SLinus Torvalds return 0; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 556ec06c096STrond Myklebust static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 5571da177e4SLinus Torvalds { 5588850df99STrond Myklebust nfs_invalidate_atime(data->inode); 5591da177e4SLinus Torvalds if (task->tk_status >= 0) { 5601da177e4SLinus Torvalds nfs_refresh_inode(data->inode, data->res.fattr); 5611da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 5621da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 5631da177e4SLinus Torvalds */ 5641da177e4SLinus Torvalds if (data->args.offset + data->args.count >= data->res.fattr->size) 5651da177e4SLinus Torvalds data->res.eof = 1; 5661da177e4SLinus Torvalds } 567ec06c096STrond Myklebust return 0; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds 570bdc7f021STrond Myklebust static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 5711da177e4SLinus Torvalds { 572bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds 575788e7a89STrond Myklebust static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 5761da177e4SLinus Torvalds { 5771da177e4SLinus Torvalds if (task->tk_status >= 0) 57870ca8852STrond Myklebust nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); 579788e7a89STrond Myklebust return 0; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 582bdc7f021STrond Myklebust static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 5831da177e4SLinus Torvalds { 5841da177e4SLinus Torvalds /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 5851da177e4SLinus Torvalds data->args.stable = NFS_FILE_SYNC; 586bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds static void 590bdc7f021STrond Myklebust nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 5911da177e4SLinus Torvalds { 5921da177e4SLinus Torvalds BUG(); 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static int 5961da177e4SLinus Torvalds nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 5971da177e4SLinus Torvalds { 5981093a60eSChuck Lever struct inode *inode = filp->f_path.dentry->d_inode; 5991093a60eSChuck Lever 6001093a60eSChuck Lever return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds 6032116271aSTrond Myklebust /* Helper functions for NFS lock bounds checking */ 6042116271aSTrond Myklebust #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 6052116271aSTrond Myklebust static int nfs_lock_check_bounds(const struct file_lock *fl) 6062116271aSTrond Myklebust { 6072116271aSTrond Myklebust __s32 start, end; 6082116271aSTrond Myklebust 6092116271aSTrond Myklebust start = (__s32)fl->fl_start; 6102116271aSTrond Myklebust if ((loff_t)start != fl->fl_start) 6112116271aSTrond Myklebust goto out_einval; 6122116271aSTrond Myklebust 6132116271aSTrond Myklebust if (fl->fl_end != OFFSET_MAX) { 6142116271aSTrond Myklebust end = (__s32)fl->fl_end; 6152116271aSTrond Myklebust if ((loff_t)end != fl->fl_end) 6162116271aSTrond Myklebust goto out_einval; 6172116271aSTrond Myklebust } else 6182116271aSTrond Myklebust end = NFS_LOCK32_OFFSET_MAX; 6192116271aSTrond Myklebust 6202116271aSTrond Myklebust if (start < 0 || start > end) 6212116271aSTrond Myklebust goto out_einval; 6222116271aSTrond Myklebust return 0; 6232116271aSTrond Myklebust out_einval: 6242116271aSTrond Myklebust return -EINVAL; 6252116271aSTrond Myklebust } 6261da177e4SLinus Torvalds 627509de811SDavid Howells const struct nfs_rpc_ops nfs_v2_clientops = { 6281da177e4SLinus Torvalds .version = 2, /* protocol version */ 6291da177e4SLinus Torvalds .dentry_ops = &nfs_dentry_operations, 6301da177e4SLinus Torvalds .dir_inode_ops = &nfs_dir_inode_operations, 63192cfc62cSJ. Bruce Fields .file_inode_ops = &nfs_file_inode_operations, 6321da177e4SLinus Torvalds .getroot = nfs_proc_get_root, 6331da177e4SLinus Torvalds .getattr = nfs_proc_getattr, 6341da177e4SLinus Torvalds .setattr = nfs_proc_setattr, 6351da177e4SLinus Torvalds .lookup = nfs_proc_lookup, 6361da177e4SLinus Torvalds .access = NULL, /* access */ 6371da177e4SLinus Torvalds .readlink = nfs_proc_readlink, 6381da177e4SLinus Torvalds .create = nfs_proc_create, 6391da177e4SLinus Torvalds .remove = nfs_proc_remove, 6401da177e4SLinus Torvalds .unlink_setup = nfs_proc_unlink_setup, 6411da177e4SLinus Torvalds .unlink_done = nfs_proc_unlink_done, 6421da177e4SLinus Torvalds .rename = nfs_proc_rename, 6431da177e4SLinus Torvalds .link = nfs_proc_link, 6441da177e4SLinus Torvalds .symlink = nfs_proc_symlink, 6451da177e4SLinus Torvalds .mkdir = nfs_proc_mkdir, 6461da177e4SLinus Torvalds .rmdir = nfs_proc_rmdir, 6471da177e4SLinus Torvalds .readdir = nfs_proc_readdir, 6481da177e4SLinus Torvalds .mknod = nfs_proc_mknod, 6491da177e4SLinus Torvalds .statfs = nfs_proc_statfs, 6501da177e4SLinus Torvalds .fsinfo = nfs_proc_fsinfo, 6511da177e4SLinus Torvalds .pathconf = nfs_proc_pathconf, 6521da177e4SLinus Torvalds .decode_dirent = nfs_decode_dirent, 6531da177e4SLinus Torvalds .read_setup = nfs_proc_read_setup, 654ec06c096STrond Myklebust .read_done = nfs_read_done, 6551da177e4SLinus Torvalds .write_setup = nfs_proc_write_setup, 656788e7a89STrond Myklebust .write_done = nfs_write_done, 6571da177e4SLinus Torvalds .commit_setup = nfs_proc_commit_setup, 6581da177e4SLinus Torvalds .file_open = nfs_open, 6591da177e4SLinus Torvalds .file_release = nfs_release, 6601da177e4SLinus Torvalds .lock = nfs_proc_lock, 6612116271aSTrond Myklebust .lock_check_bounds = nfs_lock_check_bounds, 6621da177e4SLinus Torvalds }; 663