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> 461da177e4SLinus Torvalds #include <linux/smp_lock.h> 47f7b422b1SDavid Howells #include "internal.h" 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_PROC 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds /* 521da177e4SLinus Torvalds * Bare-bones access to getattr: this is for nfs_read_super. 531da177e4SLinus Torvalds */ 541da177e4SLinus Torvalds static int 551da177e4SLinus Torvalds nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 561da177e4SLinus Torvalds struct nfs_fsinfo *info) 571da177e4SLinus Torvalds { 581da177e4SLinus Torvalds struct nfs_fattr *fattr = info->fattr; 591da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 60dead28daSChuck Lever struct rpc_message msg = { 61dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 62dead28daSChuck Lever .rpc_argp = fhandle, 63dead28daSChuck Lever .rpc_resp = fattr, 64dead28daSChuck Lever }; 651da177e4SLinus Torvalds int status; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds dprintk("%s: call getattr\n", __FUNCTION__); 680e574af1STrond Myklebust nfs_fattr_init(fattr); 695006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 701da177e4SLinus Torvalds dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); 711da177e4SLinus Torvalds if (status) 721da177e4SLinus Torvalds return status; 731da177e4SLinus Torvalds dprintk("%s: call statfs\n", __FUNCTION__); 74dead28daSChuck Lever msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 75dead28daSChuck Lever msg.rpc_resp = &fsinfo; 765006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 771da177e4SLinus Torvalds dprintk("%s: reply statfs: %d\n", __FUNCTION__, status); 781da177e4SLinus Torvalds if (status) 791da177e4SLinus Torvalds return status; 801da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 811da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 821da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 831da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 841da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 851da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 861da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 871da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 881da177e4SLinus Torvalds info->lease_time = 0; 891da177e4SLinus Torvalds return 0; 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds /* 931da177e4SLinus Torvalds * One function for each procedure in the NFS protocol. 941da177e4SLinus Torvalds */ 951da177e4SLinus Torvalds static int 961da177e4SLinus Torvalds nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 971da177e4SLinus Torvalds struct nfs_fattr *fattr) 981da177e4SLinus Torvalds { 99dead28daSChuck Lever struct rpc_message msg = { 100dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 101dead28daSChuck Lever .rpc_argp = fhandle, 102dead28daSChuck Lever .rpc_resp = fattr, 103dead28daSChuck Lever }; 1041da177e4SLinus Torvalds int status; 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds dprintk("NFS call getattr\n"); 1070e574af1STrond Myklebust nfs_fattr_init(fattr); 108dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 1091da177e4SLinus Torvalds dprintk("NFS reply getattr: %d\n", status); 1101da177e4SLinus Torvalds return status; 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds static int 1141da177e4SLinus Torvalds nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 1151da177e4SLinus Torvalds struct iattr *sattr) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 1181da177e4SLinus Torvalds struct nfs_sattrargs arg = { 1191da177e4SLinus Torvalds .fh = NFS_FH(inode), 1201da177e4SLinus Torvalds .sattr = sattr 1211da177e4SLinus Torvalds }; 122dead28daSChuck Lever struct rpc_message msg = { 123dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 124dead28daSChuck Lever .rpc_argp = &arg, 125dead28daSChuck Lever .rpc_resp = fattr, 126dead28daSChuck Lever }; 1271da177e4SLinus Torvalds int status; 1281da177e4SLinus Torvalds 129cf3fff54STrond Myklebust /* Mask out the non-modebit related stuff from attr->ia_mode */ 130cf3fff54STrond Myklebust sattr->ia_mode &= S_IALLUGO; 131cf3fff54STrond Myklebust 1321da177e4SLinus Torvalds dprintk("NFS call setattr\n"); 1330e574af1STrond Myklebust nfs_fattr_init(fattr); 134dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 13565e4308dSTrond Myklebust if (status == 0) 13665e4308dSTrond Myklebust nfs_setattr_update_inode(inode, sattr); 1371da177e4SLinus Torvalds dprintk("NFS reply setattr: %d\n", status); 1381da177e4SLinus Torvalds return status; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds static int 1421da177e4SLinus Torvalds nfs_proc_lookup(struct inode *dir, struct qstr *name, 1431da177e4SLinus Torvalds struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds struct nfs_diropargs arg = { 1461da177e4SLinus Torvalds .fh = NFS_FH(dir), 1471da177e4SLinus Torvalds .name = name->name, 1481da177e4SLinus Torvalds .len = name->len 1491da177e4SLinus Torvalds }; 1501da177e4SLinus Torvalds struct nfs_diropok res = { 1511da177e4SLinus Torvalds .fh = fhandle, 1521da177e4SLinus Torvalds .fattr = fattr 1531da177e4SLinus Torvalds }; 154dead28daSChuck Lever struct rpc_message msg = { 155dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 156dead28daSChuck Lever .rpc_argp = &arg, 157dead28daSChuck Lever .rpc_resp = &res, 158dead28daSChuck Lever }; 1591da177e4SLinus Torvalds int status; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds dprintk("NFS call lookup %s\n", name->name); 1620e574af1STrond Myklebust nfs_fattr_init(fattr); 163dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 1641da177e4SLinus Torvalds dprintk("NFS reply lookup: %d\n", status); 1651da177e4SLinus Torvalds return status; 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds static int nfs_proc_readlink(struct inode *inode, struct page *page, 1691da177e4SLinus Torvalds unsigned int pgbase, unsigned int pglen) 1701da177e4SLinus Torvalds { 1711da177e4SLinus Torvalds struct nfs_readlinkargs args = { 1721da177e4SLinus Torvalds .fh = NFS_FH(inode), 1731da177e4SLinus Torvalds .pgbase = pgbase, 1741da177e4SLinus Torvalds .pglen = pglen, 1751da177e4SLinus Torvalds .pages = &page 1761da177e4SLinus Torvalds }; 177dead28daSChuck Lever struct rpc_message msg = { 178dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 179dead28daSChuck Lever .rpc_argp = &args, 180dead28daSChuck Lever }; 1811da177e4SLinus Torvalds int status; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds dprintk("NFS call readlink\n"); 184dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1851da177e4SLinus Torvalds dprintk("NFS reply readlink: %d\n", status); 1861da177e4SLinus Torvalds return status; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds static int nfs_proc_read(struct nfs_read_data *rdata) 1901da177e4SLinus Torvalds { 1911da177e4SLinus Torvalds int flags = rdata->flags; 1921da177e4SLinus Torvalds struct inode * inode = rdata->inode; 1931da177e4SLinus Torvalds struct nfs_fattr * fattr = rdata->res.fattr; 1941da177e4SLinus Torvalds struct rpc_message msg = { 1951da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READ], 1961da177e4SLinus Torvalds .rpc_argp = &rdata->args, 1971da177e4SLinus Torvalds .rpc_resp = &rdata->res, 1981da177e4SLinus Torvalds .rpc_cred = rdata->cred, 1991da177e4SLinus Torvalds }; 2001da177e4SLinus Torvalds int status; 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds dprintk("NFS call read %d @ %Ld\n", rdata->args.count, 2031da177e4SLinus Torvalds (long long) rdata->args.offset); 2040e574af1STrond Myklebust nfs_fattr_init(fattr); 2051da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); 2061da177e4SLinus Torvalds if (status >= 0) { 2071da177e4SLinus Torvalds nfs_refresh_inode(inode, fattr); 2081da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 2091da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 2101da177e4SLinus Torvalds */ 2111da177e4SLinus Torvalds if (rdata->args.offset + rdata->args.count >= fattr->size) 2121da177e4SLinus Torvalds rdata->res.eof = 1; 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds dprintk("NFS reply read: %d\n", status); 2151da177e4SLinus Torvalds return status; 2161da177e4SLinus Torvalds } 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds static int nfs_proc_write(struct nfs_write_data *wdata) 2191da177e4SLinus Torvalds { 2201da177e4SLinus Torvalds int flags = wdata->flags; 2211da177e4SLinus Torvalds struct inode * inode = wdata->inode; 2221da177e4SLinus Torvalds struct nfs_fattr * fattr = wdata->res.fattr; 2231da177e4SLinus Torvalds struct rpc_message msg = { 2241da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_WRITE], 2251da177e4SLinus Torvalds .rpc_argp = &wdata->args, 2261da177e4SLinus Torvalds .rpc_resp = &wdata->res, 2271da177e4SLinus Torvalds .rpc_cred = wdata->cred, 2281da177e4SLinus Torvalds }; 2291da177e4SLinus Torvalds int status; 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds dprintk("NFS call write %d @ %Ld\n", wdata->args.count, 2321da177e4SLinus Torvalds (long long) wdata->args.offset); 2330e574af1STrond Myklebust nfs_fattr_init(fattr); 2341da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); 2351da177e4SLinus Torvalds if (status >= 0) { 236decf491fSTrond Myklebust nfs_post_op_update_inode(inode, fattr); 2371da177e4SLinus Torvalds wdata->res.count = wdata->args.count; 2381da177e4SLinus Torvalds wdata->verf.committed = NFS_FILE_SYNC; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds dprintk("NFS reply write: %d\n", status); 2411da177e4SLinus Torvalds return status < 0? status : wdata->res.count; 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds static int 2451da177e4SLinus Torvalds nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 24602a913a7STrond Myklebust int flags, struct nameidata *nd) 2471da177e4SLinus Torvalds { 2481da177e4SLinus Torvalds struct nfs_fh fhandle; 2491da177e4SLinus Torvalds struct nfs_fattr fattr; 2501da177e4SLinus Torvalds struct nfs_createargs arg = { 2511da177e4SLinus Torvalds .fh = NFS_FH(dir), 2521da177e4SLinus Torvalds .name = dentry->d_name.name, 2531da177e4SLinus Torvalds .len = dentry->d_name.len, 2541da177e4SLinus Torvalds .sattr = sattr 2551da177e4SLinus Torvalds }; 2561da177e4SLinus Torvalds struct nfs_diropok res = { 2571da177e4SLinus Torvalds .fh = &fhandle, 2581da177e4SLinus Torvalds .fattr = &fattr 2591da177e4SLinus Torvalds }; 260dead28daSChuck Lever struct rpc_message msg = { 261dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 262dead28daSChuck Lever .rpc_argp = &arg, 263dead28daSChuck Lever .rpc_resp = &res, 264dead28daSChuck Lever }; 2651da177e4SLinus Torvalds int status; 2661da177e4SLinus Torvalds 2670e574af1STrond Myklebust nfs_fattr_init(&fattr); 2681da177e4SLinus Torvalds dprintk("NFS call create %s\n", dentry->d_name.name); 269dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2701da177e4SLinus Torvalds if (status == 0) 2711da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2721da177e4SLinus Torvalds dprintk("NFS reply create: %d\n", status); 2731da177e4SLinus Torvalds return status; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * In NFSv2, mknod is grafted onto the create call. 2781da177e4SLinus Torvalds */ 2791da177e4SLinus Torvalds static int 2801da177e4SLinus Torvalds nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2811da177e4SLinus Torvalds dev_t rdev) 2821da177e4SLinus Torvalds { 2831da177e4SLinus Torvalds struct nfs_fh fhandle; 2841da177e4SLinus Torvalds struct nfs_fattr fattr; 2851da177e4SLinus Torvalds struct nfs_createargs arg = { 2861da177e4SLinus Torvalds .fh = NFS_FH(dir), 2871da177e4SLinus Torvalds .name = dentry->d_name.name, 2881da177e4SLinus Torvalds .len = dentry->d_name.len, 2891da177e4SLinus Torvalds .sattr = sattr 2901da177e4SLinus Torvalds }; 2911da177e4SLinus Torvalds struct nfs_diropok res = { 2921da177e4SLinus Torvalds .fh = &fhandle, 2931da177e4SLinus Torvalds .fattr = &fattr 2941da177e4SLinus Torvalds }; 295dead28daSChuck Lever struct rpc_message msg = { 296dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 297dead28daSChuck Lever .rpc_argp = &arg, 298dead28daSChuck Lever .rpc_resp = &res, 299dead28daSChuck Lever }; 3001da177e4SLinus Torvalds int status, mode; 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds dprintk("NFS call mknod %s\n", dentry->d_name.name); 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds mode = sattr->ia_mode; 3051da177e4SLinus Torvalds if (S_ISFIFO(mode)) { 3061da177e4SLinus Torvalds sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 3071da177e4SLinus Torvalds sattr->ia_valid &= ~ATTR_SIZE; 3081da177e4SLinus Torvalds } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 3091da177e4SLinus Torvalds sattr->ia_valid |= ATTR_SIZE; 3101da177e4SLinus Torvalds sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 3130e574af1STrond Myklebust nfs_fattr_init(&fattr); 314dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 315decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds if (status == -EINVAL && S_ISFIFO(mode)) { 3181da177e4SLinus Torvalds sattr->ia_mode = mode; 3190e574af1STrond Myklebust nfs_fattr_init(&fattr); 320dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds if (status == 0) 3231da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 3241da177e4SLinus Torvalds dprintk("NFS reply mknod: %d\n", status); 3251da177e4SLinus Torvalds return status; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds static int 3291da177e4SLinus Torvalds nfs_proc_remove(struct inode *dir, struct qstr *name) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds struct nfs_diropargs arg = { 3321da177e4SLinus Torvalds .fh = NFS_FH(dir), 3331da177e4SLinus Torvalds .name = name->name, 3341da177e4SLinus Torvalds .len = name->len 3351da177e4SLinus Torvalds }; 3361da177e4SLinus Torvalds struct rpc_message msg = { 3371da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 3381da177e4SLinus Torvalds .rpc_argp = &arg, 3391da177e4SLinus Torvalds }; 3401da177e4SLinus Torvalds int status; 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds dprintk("NFS call remove %s\n", name->name); 3431da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 344decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds dprintk("NFS reply remove: %d\n", status); 3471da177e4SLinus Torvalds return status; 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds static int 3511da177e4SLinus Torvalds nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) 3521da177e4SLinus Torvalds { 3531da177e4SLinus Torvalds struct nfs_diropargs *arg; 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL); 3561da177e4SLinus Torvalds if (!arg) 3571da177e4SLinus Torvalds return -ENOMEM; 3581da177e4SLinus Torvalds arg->fh = NFS_FH(dir->d_inode); 3591da177e4SLinus Torvalds arg->name = name->name; 3601da177e4SLinus Torvalds arg->len = name->len; 3611da177e4SLinus Torvalds msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 3621da177e4SLinus Torvalds msg->rpc_argp = arg; 3631da177e4SLinus Torvalds return 0; 3641da177e4SLinus Torvalds } 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds static int 3671da177e4SLinus Torvalds nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task) 3681da177e4SLinus Torvalds { 3691da177e4SLinus Torvalds struct rpc_message *msg = &task->tk_msg; 3701da177e4SLinus Torvalds 371decf491fSTrond Myklebust if (msg->rpc_argp) { 372decf491fSTrond Myklebust nfs_mark_for_revalidate(dir->d_inode); 3731da177e4SLinus Torvalds kfree(msg->rpc_argp); 374decf491fSTrond Myklebust } 3751da177e4SLinus Torvalds return 0; 3761da177e4SLinus Torvalds } 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds static int 3791da177e4SLinus Torvalds nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 3801da177e4SLinus Torvalds struct inode *new_dir, struct qstr *new_name) 3811da177e4SLinus Torvalds { 3821da177e4SLinus Torvalds struct nfs_renameargs arg = { 3831da177e4SLinus Torvalds .fromfh = NFS_FH(old_dir), 3841da177e4SLinus Torvalds .fromname = old_name->name, 3851da177e4SLinus Torvalds .fromlen = old_name->len, 3861da177e4SLinus Torvalds .tofh = NFS_FH(new_dir), 3871da177e4SLinus Torvalds .toname = new_name->name, 3881da177e4SLinus Torvalds .tolen = new_name->len 3891da177e4SLinus Torvalds }; 390dead28daSChuck Lever struct rpc_message msg = { 391dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 392dead28daSChuck Lever .rpc_argp = &arg, 393dead28daSChuck Lever }; 3941da177e4SLinus Torvalds int status; 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 397dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 398decf491fSTrond Myklebust nfs_mark_for_revalidate(old_dir); 399decf491fSTrond Myklebust nfs_mark_for_revalidate(new_dir); 4001da177e4SLinus Torvalds dprintk("NFS reply rename: %d\n", status); 4011da177e4SLinus Torvalds return status; 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds static int 4051da177e4SLinus Torvalds nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 4061da177e4SLinus Torvalds { 4071da177e4SLinus Torvalds struct nfs_linkargs arg = { 4081da177e4SLinus Torvalds .fromfh = NFS_FH(inode), 4091da177e4SLinus Torvalds .tofh = NFS_FH(dir), 4101da177e4SLinus Torvalds .toname = name->name, 4111da177e4SLinus Torvalds .tolen = name->len 4121da177e4SLinus Torvalds }; 413dead28daSChuck Lever struct rpc_message msg = { 414dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LINK], 415dead28daSChuck Lever .rpc_argp = &arg, 416dead28daSChuck Lever }; 4171da177e4SLinus Torvalds int status; 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds dprintk("NFS call link %s\n", name->name); 420dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 4215ba7cc48STrond Myklebust nfs_mark_for_revalidate(inode); 422decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4231da177e4SLinus Torvalds dprintk("NFS reply link: %d\n", status); 4241da177e4SLinus Torvalds return status; 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds static int 4284f390c15SChuck Lever nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct qstr *path, 4294f390c15SChuck Lever struct iattr *sattr) 4301da177e4SLinus Torvalds { 4314f390c15SChuck Lever struct nfs_fh fhandle; 4324f390c15SChuck Lever struct nfs_fattr fattr; 4331da177e4SLinus Torvalds struct nfs_symlinkargs arg = { 4341da177e4SLinus Torvalds .fromfh = NFS_FH(dir), 4354f390c15SChuck Lever .fromname = dentry->d_name.name, 4364f390c15SChuck Lever .fromlen = dentry->d_name.len, 4371da177e4SLinus Torvalds .topath = path->name, 4381da177e4SLinus Torvalds .tolen = path->len, 4391da177e4SLinus Torvalds .sattr = sattr 4401da177e4SLinus Torvalds }; 441dead28daSChuck Lever struct rpc_message msg = { 442dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 443dead28daSChuck Lever .rpc_argp = &arg, 444dead28daSChuck Lever }; 4451da177e4SLinus Torvalds int status; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds if (path->len > NFS2_MAXPATHLEN) 4481da177e4SLinus Torvalds return -ENAMETOOLONG; 4494f390c15SChuck Lever 4504f390c15SChuck Lever dprintk("NFS call symlink %s -> %s\n", dentry->d_name.name, 4514f390c15SChuck Lever path->name); 452dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 453decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4544f390c15SChuck Lever 4554f390c15SChuck Lever /* 4564f390c15SChuck Lever * V2 SYMLINK requests don't return any attributes. Setting the 4574f390c15SChuck Lever * filehandle size to zero indicates to nfs_instantiate that it 4584f390c15SChuck Lever * should fill in the data with a LOOKUP call on the wire. 4594f390c15SChuck Lever */ 4604f390c15SChuck Lever if (status == 0) { 4614f390c15SChuck Lever nfs_fattr_init(&fattr); 4624f390c15SChuck Lever fhandle.size = 0; 4634f390c15SChuck Lever status = nfs_instantiate(dentry, &fhandle, &fattr); 4644f390c15SChuck Lever } 4654f390c15SChuck Lever 4661da177e4SLinus Torvalds dprintk("NFS reply symlink: %d\n", status); 4671da177e4SLinus Torvalds return status; 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds static int 4711da177e4SLinus Torvalds nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 4721da177e4SLinus Torvalds { 4731da177e4SLinus Torvalds struct nfs_fh fhandle; 4741da177e4SLinus Torvalds struct nfs_fattr fattr; 4751da177e4SLinus Torvalds struct nfs_createargs arg = { 4761da177e4SLinus Torvalds .fh = NFS_FH(dir), 4771da177e4SLinus Torvalds .name = dentry->d_name.name, 4781da177e4SLinus Torvalds .len = dentry->d_name.len, 4791da177e4SLinus Torvalds .sattr = sattr 4801da177e4SLinus Torvalds }; 4811da177e4SLinus Torvalds struct nfs_diropok res = { 4821da177e4SLinus Torvalds .fh = &fhandle, 4831da177e4SLinus Torvalds .fattr = &fattr 4841da177e4SLinus Torvalds }; 485dead28daSChuck Lever struct rpc_message msg = { 486dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 487dead28daSChuck Lever .rpc_argp = &arg, 488dead28daSChuck Lever .rpc_resp = &res, 489dead28daSChuck Lever }; 4901da177e4SLinus Torvalds int status; 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds dprintk("NFS call mkdir %s\n", dentry->d_name.name); 4930e574af1STrond Myklebust nfs_fattr_init(&fattr); 494dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 495decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4961da177e4SLinus Torvalds if (status == 0) 4971da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 4981da177e4SLinus Torvalds dprintk("NFS reply mkdir: %d\n", status); 4991da177e4SLinus Torvalds return status; 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds static int 5031da177e4SLinus Torvalds nfs_proc_rmdir(struct inode *dir, struct qstr *name) 5041da177e4SLinus Torvalds { 5051da177e4SLinus Torvalds struct nfs_diropargs arg = { 5061da177e4SLinus Torvalds .fh = NFS_FH(dir), 5071da177e4SLinus Torvalds .name = name->name, 5081da177e4SLinus Torvalds .len = name->len 5091da177e4SLinus Torvalds }; 510dead28daSChuck Lever struct rpc_message msg = { 511dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 512dead28daSChuck Lever .rpc_argp = &arg, 513dead28daSChuck Lever }; 5141da177e4SLinus Torvalds int status; 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds dprintk("NFS call rmdir %s\n", name->name); 517dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 518decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 5191da177e4SLinus Torvalds dprintk("NFS reply rmdir: %d\n", status); 5201da177e4SLinus Torvalds return status; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds /* 5241da177e4SLinus Torvalds * The READDIR implementation is somewhat hackish - we pass a temporary 5251da177e4SLinus Torvalds * buffer to the encode function, which installs it in the receive 5261da177e4SLinus Torvalds * the receive iovec. The decode function just parses the reply to make 5271da177e4SLinus Torvalds * sure it is syntactically correct; the entries itself are decoded 5281da177e4SLinus Torvalds * from nfs_readdir by calling the decode_entry function directly. 5291da177e4SLinus Torvalds */ 5301da177e4SLinus Torvalds static int 5311da177e4SLinus Torvalds nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 5321da177e4SLinus Torvalds u64 cookie, struct page *page, unsigned int count, int plus) 5331da177e4SLinus Torvalds { 5341da177e4SLinus Torvalds struct inode *dir = dentry->d_inode; 5351da177e4SLinus Torvalds struct nfs_readdirargs arg = { 5361da177e4SLinus Torvalds .fh = NFS_FH(dir), 5371da177e4SLinus Torvalds .cookie = cookie, 5381da177e4SLinus Torvalds .count = count, 539dead28daSChuck Lever .pages = &page, 5401da177e4SLinus Torvalds }; 5411da177e4SLinus Torvalds struct rpc_message msg = { 5421da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 5431da177e4SLinus Torvalds .rpc_argp = &arg, 544dead28daSChuck Lever .rpc_cred = cred, 5451da177e4SLinus Torvalds }; 5461da177e4SLinus Torvalds int status; 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds lock_kernel(); 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds dprintk("NFS call readdir %d\n", (unsigned int)cookie); 5511da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds dprintk("NFS reply readdir: %d\n", status); 5541da177e4SLinus Torvalds unlock_kernel(); 5551da177e4SLinus Torvalds return status; 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds static int 5591da177e4SLinus Torvalds nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5601da177e4SLinus Torvalds struct nfs_fsstat *stat) 5611da177e4SLinus Torvalds { 5621da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 563dead28daSChuck Lever struct rpc_message msg = { 564dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 565dead28daSChuck Lever .rpc_argp = fhandle, 566dead28daSChuck Lever .rpc_resp = &fsinfo, 567dead28daSChuck Lever }; 5681da177e4SLinus Torvalds int status; 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds dprintk("NFS call statfs\n"); 5710e574af1STrond Myklebust nfs_fattr_init(stat->fattr); 572dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5731da177e4SLinus Torvalds dprintk("NFS reply statfs: %d\n", status); 5741da177e4SLinus Torvalds if (status) 5751da177e4SLinus Torvalds goto out; 5761da177e4SLinus Torvalds stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 5771da177e4SLinus Torvalds stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 5781da177e4SLinus Torvalds stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 5791da177e4SLinus Torvalds stat->tfiles = 0; 5801da177e4SLinus Torvalds stat->ffiles = 0; 5811da177e4SLinus Torvalds stat->afiles = 0; 5821da177e4SLinus Torvalds out: 5831da177e4SLinus Torvalds return status; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds static int 5871da177e4SLinus Torvalds nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5881da177e4SLinus Torvalds struct nfs_fsinfo *info) 5891da177e4SLinus Torvalds { 5901da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 591dead28daSChuck Lever struct rpc_message msg = { 592dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 593dead28daSChuck Lever .rpc_argp = fhandle, 594dead28daSChuck Lever .rpc_resp = &fsinfo, 595dead28daSChuck Lever }; 5961da177e4SLinus Torvalds int status; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds dprintk("NFS call fsinfo\n"); 5990e574af1STrond Myklebust nfs_fattr_init(info->fattr); 600dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 6011da177e4SLinus Torvalds dprintk("NFS reply fsinfo: %d\n", status); 6021da177e4SLinus Torvalds if (status) 6031da177e4SLinus Torvalds goto out; 6041da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 6051da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 6061da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 6071da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 6081da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 6091da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 6101da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 6111da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 6121da177e4SLinus Torvalds info->lease_time = 0; 6131da177e4SLinus Torvalds out: 6141da177e4SLinus Torvalds return status; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds static int 6181da177e4SLinus Torvalds nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 6191da177e4SLinus Torvalds struct nfs_pathconf *info) 6201da177e4SLinus Torvalds { 6211da177e4SLinus Torvalds info->max_link = 0; 6221da177e4SLinus Torvalds info->max_namelen = NFS2_MAXNAMLEN; 6231da177e4SLinus Torvalds return 0; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds 626ec06c096STrond Myklebust static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 6271da177e4SLinus Torvalds { 6281da177e4SLinus Torvalds if (task->tk_status >= 0) { 6291da177e4SLinus Torvalds nfs_refresh_inode(data->inode, data->res.fattr); 6301da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 6311da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 6321da177e4SLinus Torvalds */ 6331da177e4SLinus Torvalds if (data->args.offset + data->args.count >= data->res.fattr->size) 6341da177e4SLinus Torvalds data->res.eof = 1; 6351da177e4SLinus Torvalds } 636ec06c096STrond Myklebust return 0; 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds 639ec06c096STrond Myklebust static void nfs_proc_read_setup(struct nfs_read_data *data) 6401da177e4SLinus Torvalds { 6411da177e4SLinus Torvalds struct rpc_message msg = { 6421da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READ], 6431da177e4SLinus Torvalds .rpc_argp = &data->args, 6441da177e4SLinus Torvalds .rpc_resp = &data->res, 6451da177e4SLinus Torvalds .rpc_cred = data->cred, 6461da177e4SLinus Torvalds }; 6471da177e4SLinus Torvalds 648ec06c096STrond Myklebust rpc_call_setup(&data->task, &msg, 0); 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds 651788e7a89STrond Myklebust static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 6521da177e4SLinus Torvalds { 6531da177e4SLinus Torvalds if (task->tk_status >= 0) 654decf491fSTrond Myklebust nfs_post_op_update_inode(data->inode, data->res.fattr); 655788e7a89STrond Myklebust return 0; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds 658788e7a89STrond Myklebust static void nfs_proc_write_setup(struct nfs_write_data *data, int how) 6591da177e4SLinus Torvalds { 6601da177e4SLinus Torvalds struct rpc_message msg = { 6611da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_WRITE], 6621da177e4SLinus Torvalds .rpc_argp = &data->args, 6631da177e4SLinus Torvalds .rpc_resp = &data->res, 6641da177e4SLinus Torvalds .rpc_cred = data->cred, 6651da177e4SLinus Torvalds }; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 6681da177e4SLinus Torvalds data->args.stable = NFS_FILE_SYNC; 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds /* Finalize the task. */ 671788e7a89STrond Myklebust rpc_call_setup(&data->task, &msg, 0); 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds static void 6751da177e4SLinus Torvalds nfs_proc_commit_setup(struct nfs_write_data *data, int how) 6761da177e4SLinus Torvalds { 6771da177e4SLinus Torvalds BUG(); 6781da177e4SLinus Torvalds } 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds static int 6811da177e4SLinus Torvalds nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 6821da177e4SLinus Torvalds { 6831da177e4SLinus Torvalds return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds 687509de811SDavid Howells const struct nfs_rpc_ops nfs_v2_clientops = { 6881da177e4SLinus Torvalds .version = 2, /* protocol version */ 6891da177e4SLinus Torvalds .dentry_ops = &nfs_dentry_operations, 6901da177e4SLinus Torvalds .dir_inode_ops = &nfs_dir_inode_operations, 69192cfc62cSJ. Bruce Fields .file_inode_ops = &nfs_file_inode_operations, 6921da177e4SLinus Torvalds .getroot = nfs_proc_get_root, 6931da177e4SLinus Torvalds .getattr = nfs_proc_getattr, 6941da177e4SLinus Torvalds .setattr = nfs_proc_setattr, 6951da177e4SLinus Torvalds .lookup = nfs_proc_lookup, 6961da177e4SLinus Torvalds .access = NULL, /* access */ 6971da177e4SLinus Torvalds .readlink = nfs_proc_readlink, 6981da177e4SLinus Torvalds .read = nfs_proc_read, 6991da177e4SLinus Torvalds .write = nfs_proc_write, 7001da177e4SLinus Torvalds .commit = NULL, /* commit */ 7011da177e4SLinus Torvalds .create = nfs_proc_create, 7021da177e4SLinus Torvalds .remove = nfs_proc_remove, 7031da177e4SLinus Torvalds .unlink_setup = nfs_proc_unlink_setup, 7041da177e4SLinus Torvalds .unlink_done = nfs_proc_unlink_done, 7051da177e4SLinus Torvalds .rename = nfs_proc_rename, 7061da177e4SLinus Torvalds .link = nfs_proc_link, 7071da177e4SLinus Torvalds .symlink = nfs_proc_symlink, 7081da177e4SLinus Torvalds .mkdir = nfs_proc_mkdir, 7091da177e4SLinus Torvalds .rmdir = nfs_proc_rmdir, 7101da177e4SLinus Torvalds .readdir = nfs_proc_readdir, 7111da177e4SLinus Torvalds .mknod = nfs_proc_mknod, 7121da177e4SLinus Torvalds .statfs = nfs_proc_statfs, 7131da177e4SLinus Torvalds .fsinfo = nfs_proc_fsinfo, 7141da177e4SLinus Torvalds .pathconf = nfs_proc_pathconf, 7151da177e4SLinus Torvalds .decode_dirent = nfs_decode_dirent, 7161da177e4SLinus Torvalds .read_setup = nfs_proc_read_setup, 717ec06c096STrond Myklebust .read_done = nfs_read_done, 7181da177e4SLinus Torvalds .write_setup = nfs_proc_write_setup, 719788e7a89STrond Myklebust .write_done = nfs_write_done, 7201da177e4SLinus Torvalds .commit_setup = nfs_proc_commit_setup, 7211da177e4SLinus Torvalds .file_open = nfs_open, 7221da177e4SLinus Torvalds .file_release = nfs_release, 7231da177e4SLinus Torvalds .lock = nfs_proc_lock, 7241da177e4SLinus Torvalds }; 725