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> 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_PROC 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds extern struct rpc_procinfo nfs_procedures[]; 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds /* 531da177e4SLinus Torvalds * Bare-bones access to getattr: this is for nfs_read_super. 541da177e4SLinus Torvalds */ 551da177e4SLinus Torvalds static int 561da177e4SLinus Torvalds nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 571da177e4SLinus Torvalds struct nfs_fsinfo *info) 581da177e4SLinus Torvalds { 591da177e4SLinus Torvalds struct nfs_fattr *fattr = info->fattr; 601da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 611da177e4SLinus Torvalds int status; 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds dprintk("%s: call getattr\n", __FUNCTION__); 641da177e4SLinus Torvalds fattr->valid = 0; 651da177e4SLinus Torvalds status = rpc_call(server->client_sys, NFSPROC_GETATTR, fhandle, fattr, 0); 661da177e4SLinus Torvalds dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); 671da177e4SLinus Torvalds if (status) 681da177e4SLinus Torvalds return status; 691da177e4SLinus Torvalds dprintk("%s: call statfs\n", __FUNCTION__); 701da177e4SLinus Torvalds status = rpc_call(server->client_sys, NFSPROC_STATFS, fhandle, &fsinfo, 0); 711da177e4SLinus Torvalds dprintk("%s: reply statfs: %d\n", __FUNCTION__, status); 721da177e4SLinus Torvalds if (status) 731da177e4SLinus Torvalds return status; 741da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 751da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 761da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 771da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 781da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 791da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 801da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 811da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 821da177e4SLinus Torvalds info->lease_time = 0; 831da177e4SLinus Torvalds return 0; 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds /* 871da177e4SLinus Torvalds * One function for each procedure in the NFS protocol. 881da177e4SLinus Torvalds */ 891da177e4SLinus Torvalds static int 901da177e4SLinus Torvalds nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 911da177e4SLinus Torvalds struct nfs_fattr *fattr) 921da177e4SLinus Torvalds { 931da177e4SLinus Torvalds int status; 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds dprintk("NFS call getattr\n"); 961da177e4SLinus Torvalds fattr->valid = 0; 971da177e4SLinus Torvalds status = rpc_call(server->client, NFSPROC_GETATTR, 981da177e4SLinus Torvalds fhandle, fattr, 0); 991da177e4SLinus Torvalds dprintk("NFS reply getattr: %d\n", status); 1001da177e4SLinus Torvalds return status; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds static int 1041da177e4SLinus Torvalds nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 1051da177e4SLinus Torvalds struct iattr *sattr) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 1081da177e4SLinus Torvalds struct nfs_sattrargs arg = { 1091da177e4SLinus Torvalds .fh = NFS_FH(inode), 1101da177e4SLinus Torvalds .sattr = sattr 1111da177e4SLinus Torvalds }; 1121da177e4SLinus Torvalds int status; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds dprintk("NFS call setattr\n"); 1151da177e4SLinus Torvalds fattr->valid = 0; 1161da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0); 1171da177e4SLinus Torvalds dprintk("NFS reply setattr: %d\n", status); 1181da177e4SLinus Torvalds return status; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static int 1221da177e4SLinus Torvalds nfs_proc_lookup(struct inode *dir, struct qstr *name, 1231da177e4SLinus Torvalds struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds struct nfs_diropargs arg = { 1261da177e4SLinus Torvalds .fh = NFS_FH(dir), 1271da177e4SLinus Torvalds .name = name->name, 1281da177e4SLinus Torvalds .len = name->len 1291da177e4SLinus Torvalds }; 1301da177e4SLinus Torvalds struct nfs_diropok res = { 1311da177e4SLinus Torvalds .fh = fhandle, 1321da177e4SLinus Torvalds .fattr = fattr 1331da177e4SLinus Torvalds }; 1341da177e4SLinus Torvalds int status; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds dprintk("NFS call lookup %s\n", name->name); 1371da177e4SLinus Torvalds fattr->valid = 0; 1381da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0); 1391da177e4SLinus Torvalds dprintk("NFS reply lookup: %d\n", status); 1401da177e4SLinus Torvalds return status; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static int nfs_proc_readlink(struct inode *inode, struct page *page, 1441da177e4SLinus Torvalds unsigned int pgbase, unsigned int pglen) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds struct nfs_readlinkargs args = { 1471da177e4SLinus Torvalds .fh = NFS_FH(inode), 1481da177e4SLinus Torvalds .pgbase = pgbase, 1491da177e4SLinus Torvalds .pglen = pglen, 1501da177e4SLinus Torvalds .pages = &page 1511da177e4SLinus Torvalds }; 1521da177e4SLinus Torvalds int status; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds dprintk("NFS call readlink\n"); 1551da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0); 1561da177e4SLinus Torvalds dprintk("NFS reply readlink: %d\n", status); 1571da177e4SLinus Torvalds return status; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static int nfs_proc_read(struct nfs_read_data *rdata) 1611da177e4SLinus Torvalds { 1621da177e4SLinus Torvalds int flags = rdata->flags; 1631da177e4SLinus Torvalds struct inode * inode = rdata->inode; 1641da177e4SLinus Torvalds struct nfs_fattr * fattr = rdata->res.fattr; 1651da177e4SLinus Torvalds struct rpc_message msg = { 1661da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READ], 1671da177e4SLinus Torvalds .rpc_argp = &rdata->args, 1681da177e4SLinus Torvalds .rpc_resp = &rdata->res, 1691da177e4SLinus Torvalds .rpc_cred = rdata->cred, 1701da177e4SLinus Torvalds }; 1711da177e4SLinus Torvalds int status; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds dprintk("NFS call read %d @ %Ld\n", rdata->args.count, 1741da177e4SLinus Torvalds (long long) rdata->args.offset); 1751da177e4SLinus Torvalds fattr->valid = 0; 1761da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); 1771da177e4SLinus Torvalds if (status >= 0) { 1781da177e4SLinus Torvalds nfs_refresh_inode(inode, fattr); 1791da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 1801da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 1811da177e4SLinus Torvalds */ 1821da177e4SLinus Torvalds if (rdata->args.offset + rdata->args.count >= fattr->size) 1831da177e4SLinus Torvalds rdata->res.eof = 1; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds dprintk("NFS reply read: %d\n", status); 1861da177e4SLinus Torvalds return status; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds static int nfs_proc_write(struct nfs_write_data *wdata) 1901da177e4SLinus Torvalds { 1911da177e4SLinus Torvalds int flags = wdata->flags; 1921da177e4SLinus Torvalds struct inode * inode = wdata->inode; 1931da177e4SLinus Torvalds struct nfs_fattr * fattr = wdata->res.fattr; 1941da177e4SLinus Torvalds struct rpc_message msg = { 1951da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_WRITE], 1961da177e4SLinus Torvalds .rpc_argp = &wdata->args, 1971da177e4SLinus Torvalds .rpc_resp = &wdata->res, 1981da177e4SLinus Torvalds .rpc_cred = wdata->cred, 1991da177e4SLinus Torvalds }; 2001da177e4SLinus Torvalds int status; 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds dprintk("NFS call write %d @ %Ld\n", wdata->args.count, 2031da177e4SLinus Torvalds (long long) wdata->args.offset); 2041da177e4SLinus Torvalds fattr->valid = 0; 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 wdata->res.count = wdata->args.count; 2091da177e4SLinus Torvalds wdata->verf.committed = NFS_FILE_SYNC; 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds dprintk("NFS reply write: %d\n", status); 2121da177e4SLinus Torvalds return status < 0? status : wdata->res.count; 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds static int 2161da177e4SLinus Torvalds nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2171da177e4SLinus Torvalds int flags) 2181da177e4SLinus Torvalds { 2191da177e4SLinus Torvalds struct nfs_fh fhandle; 2201da177e4SLinus Torvalds struct nfs_fattr fattr; 2211da177e4SLinus Torvalds struct nfs_createargs arg = { 2221da177e4SLinus Torvalds .fh = NFS_FH(dir), 2231da177e4SLinus Torvalds .name = dentry->d_name.name, 2241da177e4SLinus Torvalds .len = dentry->d_name.len, 2251da177e4SLinus Torvalds .sattr = sattr 2261da177e4SLinus Torvalds }; 2271da177e4SLinus Torvalds struct nfs_diropok res = { 2281da177e4SLinus Torvalds .fh = &fhandle, 2291da177e4SLinus Torvalds .fattr = &fattr 2301da177e4SLinus Torvalds }; 2311da177e4SLinus Torvalds int status; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds fattr.valid = 0; 2341da177e4SLinus Torvalds dprintk("NFS call create %s\n", dentry->d_name.name); 2351da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); 2361da177e4SLinus Torvalds if (status == 0) 2371da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2381da177e4SLinus Torvalds dprintk("NFS reply create: %d\n", status); 2391da177e4SLinus Torvalds return status; 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds /* 2431da177e4SLinus Torvalds * In NFSv2, mknod is grafted onto the create call. 2441da177e4SLinus Torvalds */ 2451da177e4SLinus Torvalds static int 2461da177e4SLinus Torvalds nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2471da177e4SLinus Torvalds dev_t rdev) 2481da177e4SLinus Torvalds { 2491da177e4SLinus Torvalds struct nfs_fh fhandle; 2501da177e4SLinus Torvalds struct nfs_fattr fattr; 2511da177e4SLinus Torvalds struct nfs_createargs arg = { 2521da177e4SLinus Torvalds .fh = NFS_FH(dir), 2531da177e4SLinus Torvalds .name = dentry->d_name.name, 2541da177e4SLinus Torvalds .len = dentry->d_name.len, 2551da177e4SLinus Torvalds .sattr = sattr 2561da177e4SLinus Torvalds }; 2571da177e4SLinus Torvalds struct nfs_diropok res = { 2581da177e4SLinus Torvalds .fh = &fhandle, 2591da177e4SLinus Torvalds .fattr = &fattr 2601da177e4SLinus Torvalds }; 2611da177e4SLinus Torvalds int status, mode; 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds dprintk("NFS call mknod %s\n", dentry->d_name.name); 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds mode = sattr->ia_mode; 2661da177e4SLinus Torvalds if (S_ISFIFO(mode)) { 2671da177e4SLinus Torvalds sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 2681da177e4SLinus Torvalds sattr->ia_valid &= ~ATTR_SIZE; 2691da177e4SLinus Torvalds } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 2701da177e4SLinus Torvalds sattr->ia_valid |= ATTR_SIZE; 2711da177e4SLinus Torvalds sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds fattr.valid = 0; 2751da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds if (status == -EINVAL && S_ISFIFO(mode)) { 2781da177e4SLinus Torvalds sattr->ia_mode = mode; 2791da177e4SLinus Torvalds fattr.valid = 0; 2801da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds if (status == 0) 2831da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2841da177e4SLinus Torvalds dprintk("NFS reply mknod: %d\n", status); 2851da177e4SLinus Torvalds return status; 2861da177e4SLinus Torvalds } 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds static int 2891da177e4SLinus Torvalds nfs_proc_remove(struct inode *dir, struct qstr *name) 2901da177e4SLinus Torvalds { 2911da177e4SLinus Torvalds struct nfs_diropargs arg = { 2921da177e4SLinus Torvalds .fh = NFS_FH(dir), 2931da177e4SLinus Torvalds .name = name->name, 2941da177e4SLinus Torvalds .len = name->len 2951da177e4SLinus Torvalds }; 2961da177e4SLinus Torvalds struct rpc_message msg = { 2971da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 2981da177e4SLinus Torvalds .rpc_argp = &arg, 2991da177e4SLinus Torvalds .rpc_resp = NULL, 3001da177e4SLinus Torvalds .rpc_cred = NULL 3011da177e4SLinus Torvalds }; 3021da177e4SLinus Torvalds int status; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds dprintk("NFS call remove %s\n", name->name); 3051da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds dprintk("NFS reply remove: %d\n", status); 3081da177e4SLinus Torvalds return status; 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds static int 3121da177e4SLinus Torvalds nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) 3131da177e4SLinus Torvalds { 3141da177e4SLinus Torvalds struct nfs_diropargs *arg; 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL); 3171da177e4SLinus Torvalds if (!arg) 3181da177e4SLinus Torvalds return -ENOMEM; 3191da177e4SLinus Torvalds arg->fh = NFS_FH(dir->d_inode); 3201da177e4SLinus Torvalds arg->name = name->name; 3211da177e4SLinus Torvalds arg->len = name->len; 3221da177e4SLinus Torvalds msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 3231da177e4SLinus Torvalds msg->rpc_argp = arg; 3241da177e4SLinus Torvalds return 0; 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds static int 3281da177e4SLinus Torvalds nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task) 3291da177e4SLinus Torvalds { 3301da177e4SLinus Torvalds struct rpc_message *msg = &task->tk_msg; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds if (msg->rpc_argp) 3331da177e4SLinus Torvalds kfree(msg->rpc_argp); 3341da177e4SLinus Torvalds return 0; 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds static int 3381da177e4SLinus Torvalds nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 3391da177e4SLinus Torvalds struct inode *new_dir, struct qstr *new_name) 3401da177e4SLinus Torvalds { 3411da177e4SLinus Torvalds struct nfs_renameargs arg = { 3421da177e4SLinus Torvalds .fromfh = NFS_FH(old_dir), 3431da177e4SLinus Torvalds .fromname = old_name->name, 3441da177e4SLinus Torvalds .fromlen = old_name->len, 3451da177e4SLinus Torvalds .tofh = NFS_FH(new_dir), 3461da177e4SLinus Torvalds .toname = new_name->name, 3471da177e4SLinus Torvalds .tolen = new_name->len 3481da177e4SLinus Torvalds }; 3491da177e4SLinus Torvalds int status; 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 3521da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0); 3531da177e4SLinus Torvalds dprintk("NFS reply rename: %d\n", status); 3541da177e4SLinus Torvalds return status; 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds static int 3581da177e4SLinus Torvalds nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3591da177e4SLinus Torvalds { 3601da177e4SLinus Torvalds struct nfs_linkargs arg = { 3611da177e4SLinus Torvalds .fromfh = NFS_FH(inode), 3621da177e4SLinus Torvalds .tofh = NFS_FH(dir), 3631da177e4SLinus Torvalds .toname = name->name, 3641da177e4SLinus Torvalds .tolen = name->len 3651da177e4SLinus Torvalds }; 3661da177e4SLinus Torvalds int status; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds dprintk("NFS call link %s\n", name->name); 3691da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0); 3701da177e4SLinus Torvalds dprintk("NFS reply link: %d\n", status); 3711da177e4SLinus Torvalds return status; 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds static int 3751da177e4SLinus Torvalds nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, 3761da177e4SLinus Torvalds struct iattr *sattr, struct nfs_fh *fhandle, 3771da177e4SLinus Torvalds struct nfs_fattr *fattr) 3781da177e4SLinus Torvalds { 3791da177e4SLinus Torvalds struct nfs_symlinkargs arg = { 3801da177e4SLinus Torvalds .fromfh = NFS_FH(dir), 3811da177e4SLinus Torvalds .fromname = name->name, 3821da177e4SLinus Torvalds .fromlen = name->len, 3831da177e4SLinus Torvalds .topath = path->name, 3841da177e4SLinus Torvalds .tolen = path->len, 3851da177e4SLinus Torvalds .sattr = sattr 3861da177e4SLinus Torvalds }; 3871da177e4SLinus Torvalds int status; 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds if (path->len > NFS2_MAXPATHLEN) 3901da177e4SLinus Torvalds return -ENAMETOOLONG; 3911da177e4SLinus Torvalds dprintk("NFS call symlink %s -> %s\n", name->name, path->name); 3921da177e4SLinus Torvalds fattr->valid = 0; 3931da177e4SLinus Torvalds fhandle->size = 0; 3941da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0); 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 }; 4141da177e4SLinus Torvalds int status; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds dprintk("NFS call mkdir %s\n", dentry->d_name.name); 4171da177e4SLinus Torvalds fattr.valid = 0; 4181da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0); 4191da177e4SLinus Torvalds if (status == 0) 4201da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 4211da177e4SLinus Torvalds dprintk("NFS reply mkdir: %d\n", status); 4221da177e4SLinus Torvalds return status; 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds static int 4261da177e4SLinus Torvalds nfs_proc_rmdir(struct inode *dir, struct qstr *name) 4271da177e4SLinus Torvalds { 4281da177e4SLinus Torvalds struct nfs_diropargs arg = { 4291da177e4SLinus Torvalds .fh = NFS_FH(dir), 4301da177e4SLinus Torvalds .name = name->name, 4311da177e4SLinus Torvalds .len = name->len 4321da177e4SLinus Torvalds }; 4331da177e4SLinus Torvalds int status; 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds dprintk("NFS call rmdir %s\n", name->name); 4361da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0); 4371da177e4SLinus Torvalds dprintk("NFS reply rmdir: %d\n", status); 4381da177e4SLinus Torvalds return status; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds * The READDIR implementation is somewhat hackish - we pass a temporary 4431da177e4SLinus Torvalds * buffer to the encode function, which installs it in the receive 4441da177e4SLinus Torvalds * the receive iovec. The decode function just parses the reply to make 4451da177e4SLinus Torvalds * sure it is syntactically correct; the entries itself are decoded 4461da177e4SLinus Torvalds * from nfs_readdir by calling the decode_entry function directly. 4471da177e4SLinus Torvalds */ 4481da177e4SLinus Torvalds static int 4491da177e4SLinus Torvalds nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4501da177e4SLinus Torvalds u64 cookie, struct page *page, unsigned int count, int plus) 4511da177e4SLinus Torvalds { 4521da177e4SLinus Torvalds struct inode *dir = dentry->d_inode; 4531da177e4SLinus Torvalds struct nfs_readdirargs arg = { 4541da177e4SLinus Torvalds .fh = NFS_FH(dir), 4551da177e4SLinus Torvalds .cookie = cookie, 4561da177e4SLinus Torvalds .count = count, 4571da177e4SLinus Torvalds .pages = &page 4581da177e4SLinus Torvalds }; 4591da177e4SLinus Torvalds struct rpc_message msg = { 4601da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 4611da177e4SLinus Torvalds .rpc_argp = &arg, 4621da177e4SLinus Torvalds .rpc_resp = NULL, 4631da177e4SLinus Torvalds .rpc_cred = cred 4641da177e4SLinus Torvalds }; 4651da177e4SLinus Torvalds int status; 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds lock_kernel(); 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds dprintk("NFS call readdir %d\n", (unsigned int)cookie); 4701da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds dprintk("NFS reply readdir: %d\n", status); 4731da177e4SLinus Torvalds unlock_kernel(); 4741da177e4SLinus Torvalds return status; 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds static int 4781da177e4SLinus Torvalds nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4791da177e4SLinus Torvalds struct nfs_fsstat *stat) 4801da177e4SLinus Torvalds { 4811da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 4821da177e4SLinus Torvalds int status; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds dprintk("NFS call statfs\n"); 4851da177e4SLinus Torvalds stat->fattr->valid = 0; 4861da177e4SLinus Torvalds status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); 4871da177e4SLinus Torvalds dprintk("NFS reply statfs: %d\n", status); 4881da177e4SLinus Torvalds if (status) 4891da177e4SLinus Torvalds goto out; 4901da177e4SLinus Torvalds stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 4911da177e4SLinus Torvalds stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 4921da177e4SLinus Torvalds stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 4931da177e4SLinus Torvalds stat->tfiles = 0; 4941da177e4SLinus Torvalds stat->ffiles = 0; 4951da177e4SLinus Torvalds stat->afiles = 0; 4961da177e4SLinus Torvalds out: 4971da177e4SLinus Torvalds return status; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds static int 5011da177e4SLinus Torvalds nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5021da177e4SLinus Torvalds struct nfs_fsinfo *info) 5031da177e4SLinus Torvalds { 5041da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 5051da177e4SLinus Torvalds int status; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds dprintk("NFS call fsinfo\n"); 5081da177e4SLinus Torvalds info->fattr->valid = 0; 5091da177e4SLinus Torvalds status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); 5101da177e4SLinus Torvalds dprintk("NFS reply fsinfo: %d\n", status); 5111da177e4SLinus Torvalds if (status) 5121da177e4SLinus Torvalds goto out; 5131da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 5141da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 5151da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 5161da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 5171da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 5181da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 5191da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 5201da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 5211da177e4SLinus Torvalds info->lease_time = 0; 5221da177e4SLinus Torvalds out: 5231da177e4SLinus Torvalds return status; 5241da177e4SLinus Torvalds } 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds static int 5271da177e4SLinus Torvalds nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5281da177e4SLinus Torvalds struct nfs_pathconf *info) 5291da177e4SLinus Torvalds { 5301da177e4SLinus Torvalds info->max_link = 0; 5311da177e4SLinus Torvalds info->max_namelen = NFS2_MAXNAMLEN; 5321da177e4SLinus Torvalds return 0; 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds static void 5381da177e4SLinus Torvalds nfs_read_done(struct rpc_task *task) 5391da177e4SLinus Torvalds { 5401da177e4SLinus Torvalds struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata; 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds if (task->tk_status >= 0) { 5431da177e4SLinus Torvalds nfs_refresh_inode(data->inode, data->res.fattr); 5441da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 5451da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 5461da177e4SLinus Torvalds */ 5471da177e4SLinus Torvalds if (data->args.offset + data->args.count >= data->res.fattr->size) 5481da177e4SLinus Torvalds data->res.eof = 1; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds nfs_readpage_result(task); 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds static void 5541da177e4SLinus Torvalds nfs_proc_read_setup(struct nfs_read_data *data) 5551da177e4SLinus Torvalds { 5561da177e4SLinus Torvalds struct rpc_task *task = &data->task; 5571da177e4SLinus Torvalds struct inode *inode = data->inode; 5581da177e4SLinus Torvalds int flags; 5591da177e4SLinus Torvalds struct rpc_message msg = { 5601da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READ], 5611da177e4SLinus Torvalds .rpc_argp = &data->args, 5621da177e4SLinus Torvalds .rpc_resp = &data->res, 5631da177e4SLinus Torvalds .rpc_cred = data->cred, 5641da177e4SLinus Torvalds }; 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds /* N.B. Do we need to test? Never called for swapfile inode */ 5671da177e4SLinus Torvalds flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds /* Finalize the task. */ 5701da177e4SLinus Torvalds rpc_init_task(task, NFS_CLIENT(inode), nfs_read_done, flags); 5711da177e4SLinus Torvalds rpc_call_setup(task, &msg, 0); 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds static void 5751da177e4SLinus Torvalds nfs_write_done(struct rpc_task *task) 5761da177e4SLinus Torvalds { 5771da177e4SLinus Torvalds struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds if (task->tk_status >= 0) 5801da177e4SLinus Torvalds nfs_refresh_inode(data->inode, data->res.fattr); 5811da177e4SLinus Torvalds nfs_writeback_done(task); 5821da177e4SLinus Torvalds } 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds static void 5851da177e4SLinus Torvalds nfs_proc_write_setup(struct nfs_write_data *data, int how) 5861da177e4SLinus Torvalds { 5871da177e4SLinus Torvalds struct rpc_task *task = &data->task; 5881da177e4SLinus Torvalds struct inode *inode = data->inode; 5891da177e4SLinus Torvalds int flags; 5901da177e4SLinus Torvalds struct rpc_message msg = { 5911da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_WRITE], 5921da177e4SLinus Torvalds .rpc_argp = &data->args, 5931da177e4SLinus Torvalds .rpc_resp = &data->res, 5941da177e4SLinus Torvalds .rpc_cred = data->cred, 5951da177e4SLinus Torvalds }; 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 5981da177e4SLinus Torvalds data->args.stable = NFS_FILE_SYNC; 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds /* Set the initial flags for the task. */ 6011da177e4SLinus Torvalds flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds /* Finalize the task. */ 6041da177e4SLinus Torvalds rpc_init_task(task, NFS_CLIENT(inode), nfs_write_done, flags); 6051da177e4SLinus Torvalds rpc_call_setup(task, &msg, 0); 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds static void 6091da177e4SLinus Torvalds nfs_proc_commit_setup(struct nfs_write_data *data, int how) 6101da177e4SLinus Torvalds { 6111da177e4SLinus Torvalds BUG(); 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds static int 6151da177e4SLinus Torvalds nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 6161da177e4SLinus Torvalds { 6171da177e4SLinus Torvalds return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds struct nfs_rpc_ops nfs_v2_clientops = { 6221da177e4SLinus Torvalds .version = 2, /* protocol version */ 6231da177e4SLinus Torvalds .dentry_ops = &nfs_dentry_operations, 6241da177e4SLinus Torvalds .dir_inode_ops = &nfs_dir_inode_operations, 6251da177e4SLinus Torvalds .getroot = nfs_proc_get_root, 6261da177e4SLinus Torvalds .getattr = nfs_proc_getattr, 6271da177e4SLinus Torvalds .setattr = nfs_proc_setattr, 6281da177e4SLinus Torvalds .lookup = nfs_proc_lookup, 6291da177e4SLinus Torvalds .access = NULL, /* access */ 6301da177e4SLinus Torvalds .readlink = nfs_proc_readlink, 6311da177e4SLinus Torvalds .read = nfs_proc_read, 6321da177e4SLinus Torvalds .write = nfs_proc_write, 6331da177e4SLinus Torvalds .commit = NULL, /* commit */ 6341da177e4SLinus Torvalds .create = nfs_proc_create, 6351da177e4SLinus Torvalds .remove = nfs_proc_remove, 6361da177e4SLinus Torvalds .unlink_setup = nfs_proc_unlink_setup, 6371da177e4SLinus Torvalds .unlink_done = nfs_proc_unlink_done, 6381da177e4SLinus Torvalds .rename = nfs_proc_rename, 6391da177e4SLinus Torvalds .link = nfs_proc_link, 6401da177e4SLinus Torvalds .symlink = nfs_proc_symlink, 6411da177e4SLinus Torvalds .mkdir = nfs_proc_mkdir, 6421da177e4SLinus Torvalds .rmdir = nfs_proc_rmdir, 6431da177e4SLinus Torvalds .readdir = nfs_proc_readdir, 6441da177e4SLinus Torvalds .mknod = nfs_proc_mknod, 6451da177e4SLinus Torvalds .statfs = nfs_proc_statfs, 6461da177e4SLinus Torvalds .fsinfo = nfs_proc_fsinfo, 6471da177e4SLinus Torvalds .pathconf = nfs_proc_pathconf, 6481da177e4SLinus Torvalds .decode_dirent = nfs_decode_dirent, 6491da177e4SLinus Torvalds .read_setup = nfs_proc_read_setup, 6501da177e4SLinus Torvalds .write_setup = nfs_proc_write_setup, 6511da177e4SLinus Torvalds .commit_setup = nfs_proc_commit_setup, 6521da177e4SLinus Torvalds .file_open = nfs_open, 6531da177e4SLinus Torvalds .file_release = nfs_release, 6541da177e4SLinus Torvalds .lock = nfs_proc_lock, 6551da177e4SLinus Torvalds }; 656