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"); 1320e574af1STrond Myklebust nfs_fattr_init(fattr); 133dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 13465e4308dSTrond Myklebust if (status == 0) 13565e4308dSTrond Myklebust nfs_setattr_update_inode(inode, sattr); 1361da177e4SLinus Torvalds dprintk("NFS reply setattr: %d\n", status); 1371da177e4SLinus Torvalds return status; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds static int 1411da177e4SLinus Torvalds nfs_proc_lookup(struct inode *dir, struct qstr *name, 1421da177e4SLinus Torvalds struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1431da177e4SLinus Torvalds { 1441da177e4SLinus Torvalds struct nfs_diropargs arg = { 1451da177e4SLinus Torvalds .fh = NFS_FH(dir), 1461da177e4SLinus Torvalds .name = name->name, 1471da177e4SLinus Torvalds .len = name->len 1481da177e4SLinus Torvalds }; 1491da177e4SLinus Torvalds struct nfs_diropok res = { 1501da177e4SLinus Torvalds .fh = fhandle, 1511da177e4SLinus Torvalds .fattr = fattr 1521da177e4SLinus Torvalds }; 153dead28daSChuck Lever struct rpc_message msg = { 154dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 155dead28daSChuck Lever .rpc_argp = &arg, 156dead28daSChuck Lever .rpc_resp = &res, 157dead28daSChuck Lever }; 1581da177e4SLinus Torvalds int status; 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds dprintk("NFS call lookup %s\n", name->name); 1610e574af1STrond Myklebust nfs_fattr_init(fattr); 162dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 1631da177e4SLinus Torvalds dprintk("NFS reply lookup: %d\n", status); 1641da177e4SLinus Torvalds return status; 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds static int nfs_proc_readlink(struct inode *inode, struct page *page, 1681da177e4SLinus Torvalds unsigned int pgbase, unsigned int pglen) 1691da177e4SLinus Torvalds { 1701da177e4SLinus Torvalds struct nfs_readlinkargs args = { 1711da177e4SLinus Torvalds .fh = NFS_FH(inode), 1721da177e4SLinus Torvalds .pgbase = pgbase, 1731da177e4SLinus Torvalds .pglen = pglen, 1741da177e4SLinus Torvalds .pages = &page 1751da177e4SLinus Torvalds }; 176dead28daSChuck Lever struct rpc_message msg = { 177dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 178dead28daSChuck Lever .rpc_argp = &args, 179dead28daSChuck Lever }; 1801da177e4SLinus Torvalds int status; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds dprintk("NFS call readlink\n"); 183dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1841da177e4SLinus Torvalds dprintk("NFS reply readlink: %d\n", status); 1851da177e4SLinus Torvalds return status; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds static int 1891da177e4SLinus Torvalds nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 19002a913a7STrond Myklebust int flags, struct nameidata *nd) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds struct nfs_fh fhandle; 1931da177e4SLinus Torvalds struct nfs_fattr fattr; 1941da177e4SLinus Torvalds struct nfs_createargs arg = { 1951da177e4SLinus Torvalds .fh = NFS_FH(dir), 1961da177e4SLinus Torvalds .name = dentry->d_name.name, 1971da177e4SLinus Torvalds .len = dentry->d_name.len, 1981da177e4SLinus Torvalds .sattr = sattr 1991da177e4SLinus Torvalds }; 2001da177e4SLinus Torvalds struct nfs_diropok res = { 2011da177e4SLinus Torvalds .fh = &fhandle, 2021da177e4SLinus Torvalds .fattr = &fattr 2031da177e4SLinus Torvalds }; 204dead28daSChuck Lever struct rpc_message msg = { 205dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 206dead28daSChuck Lever .rpc_argp = &arg, 207dead28daSChuck Lever .rpc_resp = &res, 208dead28daSChuck Lever }; 2091da177e4SLinus Torvalds int status; 2101da177e4SLinus Torvalds 2110e574af1STrond Myklebust nfs_fattr_init(&fattr); 2121da177e4SLinus Torvalds dprintk("NFS call create %s\n", dentry->d_name.name); 213dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 214bad2a524STrond Myklebust nfs_mark_for_revalidate(dir); 2151da177e4SLinus Torvalds if (status == 0) 2161da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2171da177e4SLinus Torvalds dprintk("NFS reply create: %d\n", status); 2181da177e4SLinus Torvalds return status; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds /* 2221da177e4SLinus Torvalds * In NFSv2, mknod is grafted onto the create call. 2231da177e4SLinus Torvalds */ 2241da177e4SLinus Torvalds static int 2251da177e4SLinus Torvalds nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2261da177e4SLinus Torvalds dev_t rdev) 2271da177e4SLinus Torvalds { 2281da177e4SLinus Torvalds struct nfs_fh fhandle; 2291da177e4SLinus Torvalds struct nfs_fattr fattr; 2301da177e4SLinus Torvalds struct nfs_createargs arg = { 2311da177e4SLinus Torvalds .fh = NFS_FH(dir), 2321da177e4SLinus Torvalds .name = dentry->d_name.name, 2331da177e4SLinus Torvalds .len = dentry->d_name.len, 2341da177e4SLinus Torvalds .sattr = sattr 2351da177e4SLinus Torvalds }; 2361da177e4SLinus Torvalds struct nfs_diropok res = { 2371da177e4SLinus Torvalds .fh = &fhandle, 2381da177e4SLinus Torvalds .fattr = &fattr 2391da177e4SLinus Torvalds }; 240dead28daSChuck Lever struct rpc_message msg = { 241dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 242dead28daSChuck Lever .rpc_argp = &arg, 243dead28daSChuck Lever .rpc_resp = &res, 244dead28daSChuck Lever }; 2451da177e4SLinus Torvalds int status, mode; 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds dprintk("NFS call mknod %s\n", dentry->d_name.name); 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds mode = sattr->ia_mode; 2501da177e4SLinus Torvalds if (S_ISFIFO(mode)) { 2511da177e4SLinus Torvalds sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 2521da177e4SLinus Torvalds sattr->ia_valid &= ~ATTR_SIZE; 2531da177e4SLinus Torvalds } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 2541da177e4SLinus Torvalds sattr->ia_valid |= ATTR_SIZE; 2551da177e4SLinus Torvalds sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds 2580e574af1STrond Myklebust nfs_fattr_init(&fattr); 259dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 260decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds if (status == -EINVAL && S_ISFIFO(mode)) { 2631da177e4SLinus Torvalds sattr->ia_mode = mode; 2640e574af1STrond Myklebust nfs_fattr_init(&fattr); 265dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds if (status == 0) 2681da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2691da177e4SLinus Torvalds dprintk("NFS reply mknod: %d\n", status); 2701da177e4SLinus Torvalds return status; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds static int 2741da177e4SLinus Torvalds nfs_proc_remove(struct inode *dir, struct qstr *name) 2751da177e4SLinus Torvalds { 2764fdc17b2STrond Myklebust struct nfs_removeargs arg = { 2771da177e4SLinus Torvalds .fh = NFS_FH(dir), 2784fdc17b2STrond Myklebust .name.len = name->len, 2794fdc17b2STrond Myklebust .name.name = name->name, 2801da177e4SLinus Torvalds }; 2811da177e4SLinus Torvalds struct rpc_message msg = { 2821da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 2831da177e4SLinus Torvalds .rpc_argp = &arg, 2841da177e4SLinus Torvalds }; 2851da177e4SLinus Torvalds int status; 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds dprintk("NFS call remove %s\n", name->name); 2881da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 289decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds dprintk("NFS reply remove: %d\n", status); 2921da177e4SLinus Torvalds return status; 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds 295e4eff1a6STrond Myklebust static void 296e4eff1a6STrond Myklebust nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 2971da177e4SLinus Torvalds { 2981da177e4SLinus Torvalds msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 301e4eff1a6STrond Myklebust static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3021da177e4SLinus Torvalds { 303e4eff1a6STrond Myklebust nfs_mark_for_revalidate(dir); 304e4eff1a6STrond Myklebust return 1; 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds static int 3081da177e4SLinus Torvalds nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 3091da177e4SLinus Torvalds struct inode *new_dir, struct qstr *new_name) 3101da177e4SLinus Torvalds { 3111da177e4SLinus Torvalds struct nfs_renameargs arg = { 3121da177e4SLinus Torvalds .fromfh = NFS_FH(old_dir), 3131da177e4SLinus Torvalds .fromname = old_name->name, 3141da177e4SLinus Torvalds .fromlen = old_name->len, 3151da177e4SLinus Torvalds .tofh = NFS_FH(new_dir), 3161da177e4SLinus Torvalds .toname = new_name->name, 3171da177e4SLinus Torvalds .tolen = new_name->len 3181da177e4SLinus Torvalds }; 319dead28daSChuck Lever struct rpc_message msg = { 320dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 321dead28daSChuck Lever .rpc_argp = &arg, 322dead28daSChuck Lever }; 3231da177e4SLinus Torvalds int status; 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 326dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 327decf491fSTrond Myklebust nfs_mark_for_revalidate(old_dir); 328decf491fSTrond Myklebust nfs_mark_for_revalidate(new_dir); 3291da177e4SLinus Torvalds dprintk("NFS reply rename: %d\n", status); 3301da177e4SLinus Torvalds return status; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds static int 3341da177e4SLinus Torvalds nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3351da177e4SLinus Torvalds { 3361da177e4SLinus Torvalds struct nfs_linkargs arg = { 3371da177e4SLinus Torvalds .fromfh = NFS_FH(inode), 3381da177e4SLinus Torvalds .tofh = NFS_FH(dir), 3391da177e4SLinus Torvalds .toname = name->name, 3401da177e4SLinus Torvalds .tolen = name->len 3411da177e4SLinus Torvalds }; 342dead28daSChuck Lever struct rpc_message msg = { 343dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LINK], 344dead28daSChuck Lever .rpc_argp = &arg, 345dead28daSChuck Lever }; 3461da177e4SLinus Torvalds int status; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds dprintk("NFS call link %s\n", name->name); 349dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 3505ba7cc48STrond Myklebust nfs_mark_for_revalidate(inode); 351decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3521da177e4SLinus Torvalds dprintk("NFS reply link: %d\n", status); 3531da177e4SLinus Torvalds return status; 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds static int 35794a6d753SChuck Lever nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 35894a6d753SChuck Lever unsigned int len, struct iattr *sattr) 3591da177e4SLinus Torvalds { 3604f390c15SChuck Lever struct nfs_fh fhandle; 3614f390c15SChuck Lever struct nfs_fattr fattr; 3621da177e4SLinus Torvalds struct nfs_symlinkargs arg = { 3631da177e4SLinus Torvalds .fromfh = NFS_FH(dir), 3644f390c15SChuck Lever .fromname = dentry->d_name.name, 3654f390c15SChuck Lever .fromlen = dentry->d_name.len, 36694a6d753SChuck Lever .pages = &page, 36794a6d753SChuck Lever .pathlen = len, 3681da177e4SLinus Torvalds .sattr = sattr 3691da177e4SLinus Torvalds }; 370dead28daSChuck Lever struct rpc_message msg = { 371dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 372dead28daSChuck Lever .rpc_argp = &arg, 373dead28daSChuck Lever }; 3741da177e4SLinus Torvalds int status; 3751da177e4SLinus Torvalds 37694a6d753SChuck Lever if (len > NFS2_MAXPATHLEN) 3771da177e4SLinus Torvalds return -ENAMETOOLONG; 3784f390c15SChuck Lever 37994a6d753SChuck Lever dprintk("NFS call symlink %s\n", dentry->d_name.name); 38094a6d753SChuck Lever 381dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 382decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3834f390c15SChuck Lever 3844f390c15SChuck Lever /* 3854f390c15SChuck Lever * V2 SYMLINK requests don't return any attributes. Setting the 3864f390c15SChuck Lever * filehandle size to zero indicates to nfs_instantiate that it 3874f390c15SChuck Lever * should fill in the data with a LOOKUP call on the wire. 3884f390c15SChuck Lever */ 3894f390c15SChuck Lever if (status == 0) { 3904f390c15SChuck Lever nfs_fattr_init(&fattr); 3914f390c15SChuck Lever fhandle.size = 0; 3924f390c15SChuck Lever status = nfs_instantiate(dentry, &fhandle, &fattr); 3934f390c15SChuck Lever } 3944f390c15SChuck Lever 3951da177e4SLinus Torvalds dprintk("NFS reply symlink: %d\n", status); 3961da177e4SLinus Torvalds return status; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds static int 4001da177e4SLinus Torvalds nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 4011da177e4SLinus Torvalds { 4021da177e4SLinus Torvalds struct nfs_fh fhandle; 4031da177e4SLinus Torvalds struct nfs_fattr fattr; 4041da177e4SLinus Torvalds struct nfs_createargs arg = { 4051da177e4SLinus Torvalds .fh = NFS_FH(dir), 4061da177e4SLinus Torvalds .name = dentry->d_name.name, 4071da177e4SLinus Torvalds .len = dentry->d_name.len, 4081da177e4SLinus Torvalds .sattr = sattr 4091da177e4SLinus Torvalds }; 4101da177e4SLinus Torvalds struct nfs_diropok res = { 4111da177e4SLinus Torvalds .fh = &fhandle, 4121da177e4SLinus Torvalds .fattr = &fattr 4131da177e4SLinus Torvalds }; 414dead28daSChuck Lever struct rpc_message msg = { 415dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 416dead28daSChuck Lever .rpc_argp = &arg, 417dead28daSChuck Lever .rpc_resp = &res, 418dead28daSChuck Lever }; 4191da177e4SLinus Torvalds int status; 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds dprintk("NFS call mkdir %s\n", dentry->d_name.name); 4220e574af1STrond Myklebust nfs_fattr_init(&fattr); 423dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 424decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4251da177e4SLinus Torvalds if (status == 0) 4261da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 4271da177e4SLinus Torvalds dprintk("NFS reply mkdir: %d\n", status); 4281da177e4SLinus Torvalds return status; 4291da177e4SLinus Torvalds } 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds static int 4321da177e4SLinus Torvalds nfs_proc_rmdir(struct inode *dir, struct qstr *name) 4331da177e4SLinus Torvalds { 4341da177e4SLinus Torvalds struct nfs_diropargs arg = { 4351da177e4SLinus Torvalds .fh = NFS_FH(dir), 4361da177e4SLinus Torvalds .name = name->name, 4371da177e4SLinus Torvalds .len = name->len 4381da177e4SLinus Torvalds }; 439dead28daSChuck Lever struct rpc_message msg = { 440dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 441dead28daSChuck Lever .rpc_argp = &arg, 442dead28daSChuck Lever }; 4431da177e4SLinus Torvalds int status; 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds dprintk("NFS call rmdir %s\n", name->name); 446dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 447decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4481da177e4SLinus Torvalds dprintk("NFS reply rmdir: %d\n", status); 4491da177e4SLinus Torvalds return status; 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* 4531da177e4SLinus Torvalds * The READDIR implementation is somewhat hackish - we pass a temporary 4541da177e4SLinus Torvalds * buffer to the encode function, which installs it in the receive 4551da177e4SLinus Torvalds * the receive iovec. The decode function just parses the reply to make 4561da177e4SLinus Torvalds * sure it is syntactically correct; the entries itself are decoded 4571da177e4SLinus Torvalds * from nfs_readdir by calling the decode_entry function directly. 4581da177e4SLinus Torvalds */ 4591da177e4SLinus Torvalds static int 4601da177e4SLinus Torvalds nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4611da177e4SLinus Torvalds u64 cookie, struct page *page, unsigned int count, int plus) 4621da177e4SLinus Torvalds { 4631da177e4SLinus Torvalds struct inode *dir = dentry->d_inode; 4641da177e4SLinus Torvalds struct nfs_readdirargs arg = { 4651da177e4SLinus Torvalds .fh = NFS_FH(dir), 4661da177e4SLinus Torvalds .cookie = cookie, 4671da177e4SLinus Torvalds .count = count, 468dead28daSChuck Lever .pages = &page, 4691da177e4SLinus Torvalds }; 4701da177e4SLinus Torvalds struct rpc_message msg = { 4711da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 4721da177e4SLinus Torvalds .rpc_argp = &arg, 473dead28daSChuck Lever .rpc_cred = cred, 4741da177e4SLinus Torvalds }; 4751da177e4SLinus Torvalds int status; 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds dprintk("NFS call readdir %d\n", (unsigned int)cookie); 4781da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 4791da177e4SLinus Torvalds 480c4812998STrond Myklebust nfs_invalidate_atime(dir); 481c4812998STrond Myklebust 4821da177e4SLinus Torvalds dprintk("NFS reply readdir: %d\n", status); 4831da177e4SLinus Torvalds return status; 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds static int 4871da177e4SLinus Torvalds nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4881da177e4SLinus Torvalds struct nfs_fsstat *stat) 4891da177e4SLinus Torvalds { 4901da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 491dead28daSChuck Lever struct rpc_message msg = { 492dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 493dead28daSChuck Lever .rpc_argp = fhandle, 494dead28daSChuck Lever .rpc_resp = &fsinfo, 495dead28daSChuck Lever }; 4961da177e4SLinus Torvalds int status; 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds dprintk("NFS call statfs\n"); 4990e574af1STrond Myklebust nfs_fattr_init(stat->fattr); 500dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5011da177e4SLinus Torvalds dprintk("NFS reply statfs: %d\n", status); 5021da177e4SLinus Torvalds if (status) 5031da177e4SLinus Torvalds goto out; 5041da177e4SLinus Torvalds stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 5051da177e4SLinus Torvalds stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 5061da177e4SLinus Torvalds stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 5071da177e4SLinus Torvalds stat->tfiles = 0; 5081da177e4SLinus Torvalds stat->ffiles = 0; 5091da177e4SLinus Torvalds stat->afiles = 0; 5101da177e4SLinus Torvalds out: 5111da177e4SLinus Torvalds return status; 5121da177e4SLinus Torvalds } 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds static int 5151da177e4SLinus Torvalds nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5161da177e4SLinus Torvalds struct nfs_fsinfo *info) 5171da177e4SLinus Torvalds { 5181da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 519dead28daSChuck Lever struct rpc_message msg = { 520dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 521dead28daSChuck Lever .rpc_argp = fhandle, 522dead28daSChuck Lever .rpc_resp = &fsinfo, 523dead28daSChuck Lever }; 5241da177e4SLinus Torvalds int status; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds dprintk("NFS call fsinfo\n"); 5270e574af1STrond Myklebust nfs_fattr_init(info->fattr); 528dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5291da177e4SLinus Torvalds dprintk("NFS reply fsinfo: %d\n", status); 5301da177e4SLinus Torvalds if (status) 5311da177e4SLinus Torvalds goto out; 5321da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 5331da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 5341da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 5351da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 5361da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 5371da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 5381da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 5391da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 5401da177e4SLinus Torvalds info->lease_time = 0; 5411da177e4SLinus Torvalds out: 5421da177e4SLinus Torvalds return status; 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds static int 5461da177e4SLinus Torvalds nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5471da177e4SLinus Torvalds struct nfs_pathconf *info) 5481da177e4SLinus Torvalds { 5491da177e4SLinus Torvalds info->max_link = 0; 5501da177e4SLinus Torvalds info->max_namelen = NFS2_MAXNAMLEN; 5511da177e4SLinus Torvalds return 0; 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds 554ec06c096STrond Myklebust static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 5551da177e4SLinus Torvalds { 5568850df99STrond Myklebust nfs_invalidate_atime(data->inode); 5571da177e4SLinus Torvalds if (task->tk_status >= 0) { 5581da177e4SLinus Torvalds nfs_refresh_inode(data->inode, data->res.fattr); 5591da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 5601da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 5611da177e4SLinus Torvalds */ 5621da177e4SLinus Torvalds if (data->args.offset + data->args.count >= data->res.fattr->size) 5631da177e4SLinus Torvalds data->res.eof = 1; 5641da177e4SLinus Torvalds } 565ec06c096STrond Myklebust return 0; 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds 568bdc7f021STrond Myklebust static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 5691da177e4SLinus Torvalds { 570bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 573788e7a89STrond Myklebust static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 5741da177e4SLinus Torvalds { 5751da177e4SLinus Torvalds if (task->tk_status >= 0) 57670ca8852STrond Myklebust nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); 577788e7a89STrond Myklebust return 0; 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds 580bdc7f021STrond Myklebust static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 5811da177e4SLinus Torvalds { 5821da177e4SLinus Torvalds /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 5831da177e4SLinus Torvalds data->args.stable = NFS_FILE_SYNC; 584bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 5851da177e4SLinus Torvalds } 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds static void 588bdc7f021STrond Myklebust nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 5891da177e4SLinus Torvalds { 5901da177e4SLinus Torvalds BUG(); 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds static int 5941da177e4SLinus Torvalds nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 5951da177e4SLinus Torvalds { 5961093a60eSChuck Lever struct inode *inode = filp->f_path.dentry->d_inode; 5971093a60eSChuck Lever 5981093a60eSChuck Lever return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds 602509de811SDavid Howells const struct nfs_rpc_ops nfs_v2_clientops = { 6031da177e4SLinus Torvalds .version = 2, /* protocol version */ 6041da177e4SLinus Torvalds .dentry_ops = &nfs_dentry_operations, 6051da177e4SLinus Torvalds .dir_inode_ops = &nfs_dir_inode_operations, 60692cfc62cSJ. Bruce Fields .file_inode_ops = &nfs_file_inode_operations, 6071da177e4SLinus Torvalds .getroot = nfs_proc_get_root, 6081da177e4SLinus Torvalds .getattr = nfs_proc_getattr, 6091da177e4SLinus Torvalds .setattr = nfs_proc_setattr, 6101da177e4SLinus Torvalds .lookup = nfs_proc_lookup, 6111da177e4SLinus Torvalds .access = NULL, /* access */ 6121da177e4SLinus Torvalds .readlink = nfs_proc_readlink, 6131da177e4SLinus Torvalds .create = nfs_proc_create, 6141da177e4SLinus Torvalds .remove = nfs_proc_remove, 6151da177e4SLinus Torvalds .unlink_setup = nfs_proc_unlink_setup, 6161da177e4SLinus Torvalds .unlink_done = nfs_proc_unlink_done, 6171da177e4SLinus Torvalds .rename = nfs_proc_rename, 6181da177e4SLinus Torvalds .link = nfs_proc_link, 6191da177e4SLinus Torvalds .symlink = nfs_proc_symlink, 6201da177e4SLinus Torvalds .mkdir = nfs_proc_mkdir, 6211da177e4SLinus Torvalds .rmdir = nfs_proc_rmdir, 6221da177e4SLinus Torvalds .readdir = nfs_proc_readdir, 6231da177e4SLinus Torvalds .mknod = nfs_proc_mknod, 6241da177e4SLinus Torvalds .statfs = nfs_proc_statfs, 6251da177e4SLinus Torvalds .fsinfo = nfs_proc_fsinfo, 6261da177e4SLinus Torvalds .pathconf = nfs_proc_pathconf, 6271da177e4SLinus Torvalds .decode_dirent = nfs_decode_dirent, 6281da177e4SLinus Torvalds .read_setup = nfs_proc_read_setup, 629ec06c096STrond Myklebust .read_done = nfs_read_done, 6301da177e4SLinus Torvalds .write_setup = nfs_proc_write_setup, 631788e7a89STrond Myklebust .write_done = nfs_write_done, 6321da177e4SLinus Torvalds .commit_setup = nfs_proc_commit_setup, 6331da177e4SLinus Torvalds .file_open = nfs_open, 6341da177e4SLinus Torvalds .file_release = nfs_release, 6351da177e4SLinus Torvalds .lock = nfs_proc_lock, 6361da177e4SLinus Torvalds }; 637