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__); 640e574af1STrond Myklebust nfs_fattr_init(fattr); 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"); 960e574af1STrond Myklebust nfs_fattr_init(fattr); 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 114cf3fff54STrond Myklebust /* Mask out the non-modebit related stuff from attr->ia_mode */ 115cf3fff54STrond Myklebust sattr->ia_mode &= S_IALLUGO; 116cf3fff54STrond Myklebust 1171da177e4SLinus Torvalds dprintk("NFS call setattr\n"); 1180e574af1STrond Myklebust nfs_fattr_init(fattr); 1191da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0); 12065e4308dSTrond Myklebust if (status == 0) 12165e4308dSTrond Myklebust nfs_setattr_update_inode(inode, sattr); 1221da177e4SLinus Torvalds dprintk("NFS reply setattr: %d\n", status); 1231da177e4SLinus Torvalds return status; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds static int 1271da177e4SLinus Torvalds nfs_proc_lookup(struct inode *dir, struct qstr *name, 1281da177e4SLinus Torvalds struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1291da177e4SLinus Torvalds { 1301da177e4SLinus Torvalds struct nfs_diropargs arg = { 1311da177e4SLinus Torvalds .fh = NFS_FH(dir), 1321da177e4SLinus Torvalds .name = name->name, 1331da177e4SLinus Torvalds .len = name->len 1341da177e4SLinus Torvalds }; 1351da177e4SLinus Torvalds struct nfs_diropok res = { 1361da177e4SLinus Torvalds .fh = fhandle, 1371da177e4SLinus Torvalds .fattr = fattr 1381da177e4SLinus Torvalds }; 1391da177e4SLinus Torvalds int status; 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds dprintk("NFS call lookup %s\n", name->name); 1420e574af1STrond Myklebust nfs_fattr_init(fattr); 1431da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0); 1441da177e4SLinus Torvalds dprintk("NFS reply lookup: %d\n", status); 1451da177e4SLinus Torvalds return status; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds static int nfs_proc_readlink(struct inode *inode, struct page *page, 1491da177e4SLinus Torvalds unsigned int pgbase, unsigned int pglen) 1501da177e4SLinus Torvalds { 1511da177e4SLinus Torvalds struct nfs_readlinkargs args = { 1521da177e4SLinus Torvalds .fh = NFS_FH(inode), 1531da177e4SLinus Torvalds .pgbase = pgbase, 1541da177e4SLinus Torvalds .pglen = pglen, 1551da177e4SLinus Torvalds .pages = &page 1561da177e4SLinus Torvalds }; 1571da177e4SLinus Torvalds int status; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds dprintk("NFS call readlink\n"); 1601da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0); 1611da177e4SLinus Torvalds dprintk("NFS reply readlink: %d\n", status); 1621da177e4SLinus Torvalds return status; 1631da177e4SLinus Torvalds } 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds static int nfs_proc_read(struct nfs_read_data *rdata) 1661da177e4SLinus Torvalds { 1671da177e4SLinus Torvalds int flags = rdata->flags; 1681da177e4SLinus Torvalds struct inode * inode = rdata->inode; 1691da177e4SLinus Torvalds struct nfs_fattr * fattr = rdata->res.fattr; 1701da177e4SLinus Torvalds struct rpc_message msg = { 1711da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READ], 1721da177e4SLinus Torvalds .rpc_argp = &rdata->args, 1731da177e4SLinus Torvalds .rpc_resp = &rdata->res, 1741da177e4SLinus Torvalds .rpc_cred = rdata->cred, 1751da177e4SLinus Torvalds }; 1761da177e4SLinus Torvalds int status; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds dprintk("NFS call read %d @ %Ld\n", rdata->args.count, 1791da177e4SLinus Torvalds (long long) rdata->args.offset); 1800e574af1STrond Myklebust nfs_fattr_init(fattr); 1811da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); 1821da177e4SLinus Torvalds if (status >= 0) { 1831da177e4SLinus Torvalds nfs_refresh_inode(inode, fattr); 1841da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 1851da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 1861da177e4SLinus Torvalds */ 1871da177e4SLinus Torvalds if (rdata->args.offset + rdata->args.count >= fattr->size) 1881da177e4SLinus Torvalds rdata->res.eof = 1; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds dprintk("NFS reply read: %d\n", status); 1911da177e4SLinus Torvalds return status; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds static int nfs_proc_write(struct nfs_write_data *wdata) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds int flags = wdata->flags; 1971da177e4SLinus Torvalds struct inode * inode = wdata->inode; 1981da177e4SLinus Torvalds struct nfs_fattr * fattr = wdata->res.fattr; 1991da177e4SLinus Torvalds struct rpc_message msg = { 2001da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_WRITE], 2011da177e4SLinus Torvalds .rpc_argp = &wdata->args, 2021da177e4SLinus Torvalds .rpc_resp = &wdata->res, 2031da177e4SLinus Torvalds .rpc_cred = wdata->cred, 2041da177e4SLinus Torvalds }; 2051da177e4SLinus Torvalds int status; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds dprintk("NFS call write %d @ %Ld\n", wdata->args.count, 2081da177e4SLinus Torvalds (long long) wdata->args.offset); 2090e574af1STrond Myklebust nfs_fattr_init(fattr); 2101da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); 2111da177e4SLinus Torvalds if (status >= 0) { 212decf491fSTrond Myklebust nfs_post_op_update_inode(inode, fattr); 2131da177e4SLinus Torvalds wdata->res.count = wdata->args.count; 2141da177e4SLinus Torvalds wdata->verf.committed = NFS_FILE_SYNC; 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds dprintk("NFS reply write: %d\n", status); 2171da177e4SLinus Torvalds return status < 0? status : wdata->res.count; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds static int 2211da177e4SLinus Torvalds nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 22202a913a7STrond Myklebust int flags, struct nameidata *nd) 2231da177e4SLinus Torvalds { 2241da177e4SLinus Torvalds struct nfs_fh fhandle; 2251da177e4SLinus Torvalds struct nfs_fattr fattr; 2261da177e4SLinus Torvalds struct nfs_createargs arg = { 2271da177e4SLinus Torvalds .fh = NFS_FH(dir), 2281da177e4SLinus Torvalds .name = dentry->d_name.name, 2291da177e4SLinus Torvalds .len = dentry->d_name.len, 2301da177e4SLinus Torvalds .sattr = sattr 2311da177e4SLinus Torvalds }; 2321da177e4SLinus Torvalds struct nfs_diropok res = { 2331da177e4SLinus Torvalds .fh = &fhandle, 2341da177e4SLinus Torvalds .fattr = &fattr 2351da177e4SLinus Torvalds }; 2361da177e4SLinus Torvalds int status; 2371da177e4SLinus Torvalds 2380e574af1STrond Myklebust nfs_fattr_init(&fattr); 2391da177e4SLinus Torvalds dprintk("NFS call create %s\n", dentry->d_name.name); 2401da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); 2411da177e4SLinus Torvalds if (status == 0) 2421da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2431da177e4SLinus Torvalds dprintk("NFS reply create: %d\n", status); 2441da177e4SLinus Torvalds return status; 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds /* 2481da177e4SLinus Torvalds * In NFSv2, mknod is grafted onto the create call. 2491da177e4SLinus Torvalds */ 2501da177e4SLinus Torvalds static int 2511da177e4SLinus Torvalds nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2521da177e4SLinus Torvalds dev_t rdev) 2531da177e4SLinus Torvalds { 2541da177e4SLinus Torvalds struct nfs_fh fhandle; 2551da177e4SLinus Torvalds struct nfs_fattr fattr; 2561da177e4SLinus Torvalds struct nfs_createargs arg = { 2571da177e4SLinus Torvalds .fh = NFS_FH(dir), 2581da177e4SLinus Torvalds .name = dentry->d_name.name, 2591da177e4SLinus Torvalds .len = dentry->d_name.len, 2601da177e4SLinus Torvalds .sattr = sattr 2611da177e4SLinus Torvalds }; 2621da177e4SLinus Torvalds struct nfs_diropok res = { 2631da177e4SLinus Torvalds .fh = &fhandle, 2641da177e4SLinus Torvalds .fattr = &fattr 2651da177e4SLinus Torvalds }; 2661da177e4SLinus Torvalds int status, mode; 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds dprintk("NFS call mknod %s\n", dentry->d_name.name); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds mode = sattr->ia_mode; 2711da177e4SLinus Torvalds if (S_ISFIFO(mode)) { 2721da177e4SLinus Torvalds sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 2731da177e4SLinus Torvalds sattr->ia_valid &= ~ATTR_SIZE; 2741da177e4SLinus Torvalds } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 2751da177e4SLinus Torvalds sattr->ia_valid |= ATTR_SIZE; 2761da177e4SLinus Torvalds sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 2771da177e4SLinus Torvalds } 2781da177e4SLinus Torvalds 2790e574af1STrond Myklebust nfs_fattr_init(&fattr); 2801da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); 281decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds if (status == -EINVAL && S_ISFIFO(mode)) { 2841da177e4SLinus Torvalds sattr->ia_mode = mode; 2850e574af1STrond Myklebust nfs_fattr_init(&fattr); 2861da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds if (status == 0) 2891da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 2901da177e4SLinus Torvalds dprintk("NFS reply mknod: %d\n", status); 2911da177e4SLinus Torvalds return status; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds static int 2951da177e4SLinus Torvalds nfs_proc_remove(struct inode *dir, struct qstr *name) 2961da177e4SLinus Torvalds { 2971da177e4SLinus Torvalds struct nfs_diropargs arg = { 2981da177e4SLinus Torvalds .fh = NFS_FH(dir), 2991da177e4SLinus Torvalds .name = name->name, 3001da177e4SLinus Torvalds .len = name->len 3011da177e4SLinus Torvalds }; 3021da177e4SLinus Torvalds struct rpc_message msg = { 3031da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 3041da177e4SLinus Torvalds .rpc_argp = &arg, 3051da177e4SLinus Torvalds .rpc_resp = NULL, 3061da177e4SLinus Torvalds .rpc_cred = NULL 3071da177e4SLinus Torvalds }; 3081da177e4SLinus Torvalds int status; 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds dprintk("NFS call remove %s\n", name->name); 3111da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 312decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds dprintk("NFS reply remove: %d\n", status); 3151da177e4SLinus Torvalds return status; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds static int 3191da177e4SLinus Torvalds nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) 3201da177e4SLinus Torvalds { 3211da177e4SLinus Torvalds struct nfs_diropargs *arg; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL); 3241da177e4SLinus Torvalds if (!arg) 3251da177e4SLinus Torvalds return -ENOMEM; 3261da177e4SLinus Torvalds arg->fh = NFS_FH(dir->d_inode); 3271da177e4SLinus Torvalds arg->name = name->name; 3281da177e4SLinus Torvalds arg->len = name->len; 3291da177e4SLinus Torvalds msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 3301da177e4SLinus Torvalds msg->rpc_argp = arg; 3311da177e4SLinus Torvalds return 0; 3321da177e4SLinus Torvalds } 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds static int 3351da177e4SLinus Torvalds nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task) 3361da177e4SLinus Torvalds { 3371da177e4SLinus Torvalds struct rpc_message *msg = &task->tk_msg; 3381da177e4SLinus Torvalds 339decf491fSTrond Myklebust if (msg->rpc_argp) { 340decf491fSTrond Myklebust nfs_mark_for_revalidate(dir->d_inode); 3411da177e4SLinus Torvalds kfree(msg->rpc_argp); 342decf491fSTrond Myklebust } 3431da177e4SLinus Torvalds return 0; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds static int 3471da177e4SLinus Torvalds nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 3481da177e4SLinus Torvalds struct inode *new_dir, struct qstr *new_name) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds struct nfs_renameargs arg = { 3511da177e4SLinus Torvalds .fromfh = NFS_FH(old_dir), 3521da177e4SLinus Torvalds .fromname = old_name->name, 3531da177e4SLinus Torvalds .fromlen = old_name->len, 3541da177e4SLinus Torvalds .tofh = NFS_FH(new_dir), 3551da177e4SLinus Torvalds .toname = new_name->name, 3561da177e4SLinus Torvalds .tolen = new_name->len 3571da177e4SLinus Torvalds }; 3581da177e4SLinus Torvalds int status; 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 3611da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0); 362decf491fSTrond Myklebust nfs_mark_for_revalidate(old_dir); 363decf491fSTrond Myklebust nfs_mark_for_revalidate(new_dir); 3641da177e4SLinus Torvalds dprintk("NFS reply rename: %d\n", status); 3651da177e4SLinus Torvalds return status; 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds static int 3691da177e4SLinus Torvalds nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3701da177e4SLinus Torvalds { 3711da177e4SLinus Torvalds struct nfs_linkargs arg = { 3721da177e4SLinus Torvalds .fromfh = NFS_FH(inode), 3731da177e4SLinus Torvalds .tofh = NFS_FH(dir), 3741da177e4SLinus Torvalds .toname = name->name, 3751da177e4SLinus Torvalds .tolen = name->len 3761da177e4SLinus Torvalds }; 3771da177e4SLinus Torvalds int status; 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds dprintk("NFS call link %s\n", name->name); 3801da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0); 3815ba7cc48STrond Myklebust nfs_mark_for_revalidate(inode); 382decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3831da177e4SLinus Torvalds dprintk("NFS reply link: %d\n", status); 3841da177e4SLinus Torvalds return status; 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds static int 3881da177e4SLinus Torvalds nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, 3891da177e4SLinus Torvalds struct iattr *sattr, struct nfs_fh *fhandle, 3901da177e4SLinus Torvalds struct nfs_fattr *fattr) 3911da177e4SLinus Torvalds { 3921da177e4SLinus Torvalds struct nfs_symlinkargs arg = { 3931da177e4SLinus Torvalds .fromfh = NFS_FH(dir), 3941da177e4SLinus Torvalds .fromname = name->name, 3951da177e4SLinus Torvalds .fromlen = name->len, 3961da177e4SLinus Torvalds .topath = path->name, 3971da177e4SLinus Torvalds .tolen = path->len, 3981da177e4SLinus Torvalds .sattr = sattr 3991da177e4SLinus Torvalds }; 4001da177e4SLinus Torvalds int status; 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds if (path->len > NFS2_MAXPATHLEN) 4031da177e4SLinus Torvalds return -ENAMETOOLONG; 4041da177e4SLinus Torvalds dprintk("NFS call symlink %s -> %s\n", name->name, path->name); 4050e574af1STrond Myklebust nfs_fattr_init(fattr); 4061da177e4SLinus Torvalds fhandle->size = 0; 4071da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0); 408decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4091da177e4SLinus Torvalds dprintk("NFS reply symlink: %d\n", status); 4101da177e4SLinus Torvalds return status; 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds static int 4141da177e4SLinus Torvalds nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 4151da177e4SLinus Torvalds { 4161da177e4SLinus Torvalds struct nfs_fh fhandle; 4171da177e4SLinus Torvalds struct nfs_fattr fattr; 4181da177e4SLinus Torvalds struct nfs_createargs arg = { 4191da177e4SLinus Torvalds .fh = NFS_FH(dir), 4201da177e4SLinus Torvalds .name = dentry->d_name.name, 4211da177e4SLinus Torvalds .len = dentry->d_name.len, 4221da177e4SLinus Torvalds .sattr = sattr 4231da177e4SLinus Torvalds }; 4241da177e4SLinus Torvalds struct nfs_diropok res = { 4251da177e4SLinus Torvalds .fh = &fhandle, 4261da177e4SLinus Torvalds .fattr = &fattr 4271da177e4SLinus Torvalds }; 4281da177e4SLinus Torvalds int status; 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds dprintk("NFS call mkdir %s\n", dentry->d_name.name); 4310e574af1STrond Myklebust nfs_fattr_init(&fattr); 4321da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0); 433decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4341da177e4SLinus Torvalds if (status == 0) 4351da177e4SLinus Torvalds status = nfs_instantiate(dentry, &fhandle, &fattr); 4361da177e4SLinus Torvalds dprintk("NFS reply mkdir: %d\n", status); 4371da177e4SLinus Torvalds return status; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds static int 4411da177e4SLinus Torvalds nfs_proc_rmdir(struct inode *dir, struct qstr *name) 4421da177e4SLinus Torvalds { 4431da177e4SLinus Torvalds struct nfs_diropargs arg = { 4441da177e4SLinus Torvalds .fh = NFS_FH(dir), 4451da177e4SLinus Torvalds .name = name->name, 4461da177e4SLinus Torvalds .len = name->len 4471da177e4SLinus Torvalds }; 4481da177e4SLinus Torvalds int status; 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds dprintk("NFS call rmdir %s\n", name->name); 4511da177e4SLinus Torvalds status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0); 452decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4531da177e4SLinus Torvalds dprintk("NFS reply rmdir: %d\n", status); 4541da177e4SLinus Torvalds return status; 4551da177e4SLinus Torvalds } 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds /* 4581da177e4SLinus Torvalds * The READDIR implementation is somewhat hackish - we pass a temporary 4591da177e4SLinus Torvalds * buffer to the encode function, which installs it in the receive 4601da177e4SLinus Torvalds * the receive iovec. The decode function just parses the reply to make 4611da177e4SLinus Torvalds * sure it is syntactically correct; the entries itself are decoded 4621da177e4SLinus Torvalds * from nfs_readdir by calling the decode_entry function directly. 4631da177e4SLinus Torvalds */ 4641da177e4SLinus Torvalds static int 4651da177e4SLinus Torvalds nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4661da177e4SLinus Torvalds u64 cookie, struct page *page, unsigned int count, int plus) 4671da177e4SLinus Torvalds { 4681da177e4SLinus Torvalds struct inode *dir = dentry->d_inode; 4691da177e4SLinus Torvalds struct nfs_readdirargs arg = { 4701da177e4SLinus Torvalds .fh = NFS_FH(dir), 4711da177e4SLinus Torvalds .cookie = cookie, 4721da177e4SLinus Torvalds .count = count, 4731da177e4SLinus Torvalds .pages = &page 4741da177e4SLinus Torvalds }; 4751da177e4SLinus Torvalds struct rpc_message msg = { 4761da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 4771da177e4SLinus Torvalds .rpc_argp = &arg, 4781da177e4SLinus Torvalds .rpc_resp = NULL, 4791da177e4SLinus Torvalds .rpc_cred = cred 4801da177e4SLinus Torvalds }; 4811da177e4SLinus Torvalds int status; 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds lock_kernel(); 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds dprintk("NFS call readdir %d\n", (unsigned int)cookie); 4861da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds dprintk("NFS reply readdir: %d\n", status); 4891da177e4SLinus Torvalds unlock_kernel(); 4901da177e4SLinus Torvalds return status; 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds static int 4941da177e4SLinus Torvalds nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4951da177e4SLinus Torvalds struct nfs_fsstat *stat) 4961da177e4SLinus Torvalds { 4971da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 4981da177e4SLinus Torvalds int status; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds dprintk("NFS call statfs\n"); 5010e574af1STrond Myklebust nfs_fattr_init(stat->fattr); 5021da177e4SLinus Torvalds status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); 5031da177e4SLinus Torvalds dprintk("NFS reply statfs: %d\n", status); 5041da177e4SLinus Torvalds if (status) 5051da177e4SLinus Torvalds goto out; 5061da177e4SLinus Torvalds stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 5071da177e4SLinus Torvalds stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 5081da177e4SLinus Torvalds stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 5091da177e4SLinus Torvalds stat->tfiles = 0; 5101da177e4SLinus Torvalds stat->ffiles = 0; 5111da177e4SLinus Torvalds stat->afiles = 0; 5121da177e4SLinus Torvalds out: 5131da177e4SLinus Torvalds return status; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds static int 5171da177e4SLinus Torvalds nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5181da177e4SLinus Torvalds struct nfs_fsinfo *info) 5191da177e4SLinus Torvalds { 5201da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 5211da177e4SLinus Torvalds int status; 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds dprintk("NFS call fsinfo\n"); 5240e574af1STrond Myklebust nfs_fattr_init(info->fattr); 5251da177e4SLinus Torvalds status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); 5261da177e4SLinus Torvalds dprintk("NFS reply fsinfo: %d\n", status); 5271da177e4SLinus Torvalds if (status) 5281da177e4SLinus Torvalds goto out; 5291da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 5301da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 5311da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 5321da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 5331da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 5341da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 5351da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 5361da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 5371da177e4SLinus Torvalds info->lease_time = 0; 5381da177e4SLinus Torvalds out: 5391da177e4SLinus Torvalds return status; 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds static int 5431da177e4SLinus Torvalds nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5441da177e4SLinus Torvalds struct nfs_pathconf *info) 5451da177e4SLinus Torvalds { 5461da177e4SLinus Torvalds info->max_link = 0; 5471da177e4SLinus Torvalds info->max_namelen = NFS2_MAXNAMLEN; 5481da177e4SLinus Torvalds return 0; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); 5521da177e4SLinus Torvalds 553963d8fe5STrond Myklebust static void nfs_read_done(struct rpc_task *task, void *calldata) 5541da177e4SLinus Torvalds { 555963d8fe5STrond Myklebust struct nfs_read_data *data = calldata; 5561da177e4SLinus Torvalds 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 } 565963d8fe5STrond Myklebust nfs_readpage_result(task, calldata); 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds 568963d8fe5STrond Myklebust static const struct rpc_call_ops nfs_read_ops = { 569963d8fe5STrond Myklebust .rpc_call_done = nfs_read_done, 570963d8fe5STrond Myklebust .rpc_release = nfs_readdata_release, 571963d8fe5STrond Myklebust }; 572963d8fe5STrond Myklebust 5731da177e4SLinus Torvalds static void 5741da177e4SLinus Torvalds nfs_proc_read_setup(struct nfs_read_data *data) 5751da177e4SLinus Torvalds { 5761da177e4SLinus Torvalds struct rpc_task *task = &data->task; 5771da177e4SLinus Torvalds struct inode *inode = data->inode; 5781da177e4SLinus Torvalds int flags; 5791da177e4SLinus Torvalds struct rpc_message msg = { 5801da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READ], 5811da177e4SLinus Torvalds .rpc_argp = &data->args, 5821da177e4SLinus Torvalds .rpc_resp = &data->res, 5831da177e4SLinus Torvalds .rpc_cred = data->cred, 5841da177e4SLinus Torvalds }; 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds /* N.B. Do we need to test? Never called for swapfile inode */ 5871da177e4SLinus Torvalds flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds /* Finalize the task. */ 590963d8fe5STrond Myklebust rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_read_ops, data); 5911da177e4SLinus Torvalds rpc_call_setup(task, &msg, 0); 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds 594963d8fe5STrond Myklebust static void nfs_write_done(struct rpc_task *task, void *calldata) 5951da177e4SLinus Torvalds { 596963d8fe5STrond Myklebust struct nfs_write_data *data = calldata; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds if (task->tk_status >= 0) 599decf491fSTrond Myklebust nfs_post_op_update_inode(data->inode, data->res.fattr); 600963d8fe5STrond Myklebust nfs_writeback_done(task, calldata); 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds 603963d8fe5STrond Myklebust static const struct rpc_call_ops nfs_write_ops = { 604963d8fe5STrond Myklebust .rpc_call_done = nfs_write_done, 605963d8fe5STrond Myklebust .rpc_release = nfs_writedata_release, 606963d8fe5STrond Myklebust }; 607963d8fe5STrond Myklebust 6081da177e4SLinus Torvalds static void 6091da177e4SLinus Torvalds nfs_proc_write_setup(struct nfs_write_data *data, int how) 6101da177e4SLinus Torvalds { 6111da177e4SLinus Torvalds struct rpc_task *task = &data->task; 6121da177e4SLinus Torvalds struct inode *inode = data->inode; 6131da177e4SLinus Torvalds int flags; 6141da177e4SLinus Torvalds struct rpc_message msg = { 6151da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_WRITE], 6161da177e4SLinus Torvalds .rpc_argp = &data->args, 6171da177e4SLinus Torvalds .rpc_resp = &data->res, 6181da177e4SLinus Torvalds .rpc_cred = data->cred, 6191da177e4SLinus Torvalds }; 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 6221da177e4SLinus Torvalds data->args.stable = NFS_FILE_SYNC; 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds /* Set the initial flags for the task. */ 6251da177e4SLinus Torvalds flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /* Finalize the task. */ 628963d8fe5STrond Myklebust rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_write_ops, data); 6291da177e4SLinus Torvalds rpc_call_setup(task, &msg, 0); 6301da177e4SLinus Torvalds } 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds static void 6331da177e4SLinus Torvalds nfs_proc_commit_setup(struct nfs_write_data *data, int how) 6341da177e4SLinus Torvalds { 6351da177e4SLinus Torvalds BUG(); 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds static int 6391da177e4SLinus Torvalds nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 6401da177e4SLinus Torvalds { 6411da177e4SLinus Torvalds return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds struct nfs_rpc_ops nfs_v2_clientops = { 6461da177e4SLinus Torvalds .version = 2, /* protocol version */ 6471da177e4SLinus Torvalds .dentry_ops = &nfs_dentry_operations, 6481da177e4SLinus Torvalds .dir_inode_ops = &nfs_dir_inode_operations, 64992cfc62cSJ. Bruce Fields .file_inode_ops = &nfs_file_inode_operations, 6501da177e4SLinus Torvalds .getroot = nfs_proc_get_root, 6511da177e4SLinus Torvalds .getattr = nfs_proc_getattr, 6521da177e4SLinus Torvalds .setattr = nfs_proc_setattr, 6531da177e4SLinus Torvalds .lookup = nfs_proc_lookup, 6541da177e4SLinus Torvalds .access = NULL, /* access */ 6551da177e4SLinus Torvalds .readlink = nfs_proc_readlink, 6561da177e4SLinus Torvalds .read = nfs_proc_read, 6571da177e4SLinus Torvalds .write = nfs_proc_write, 6581da177e4SLinus Torvalds .commit = NULL, /* commit */ 6591da177e4SLinus Torvalds .create = nfs_proc_create, 6601da177e4SLinus Torvalds .remove = nfs_proc_remove, 6611da177e4SLinus Torvalds .unlink_setup = nfs_proc_unlink_setup, 6621da177e4SLinus Torvalds .unlink_done = nfs_proc_unlink_done, 6631da177e4SLinus Torvalds .rename = nfs_proc_rename, 6641da177e4SLinus Torvalds .link = nfs_proc_link, 6651da177e4SLinus Torvalds .symlink = nfs_proc_symlink, 6661da177e4SLinus Torvalds .mkdir = nfs_proc_mkdir, 6671da177e4SLinus Torvalds .rmdir = nfs_proc_rmdir, 6681da177e4SLinus Torvalds .readdir = nfs_proc_readdir, 6691da177e4SLinus Torvalds .mknod = nfs_proc_mknod, 6701da177e4SLinus Torvalds .statfs = nfs_proc_statfs, 6711da177e4SLinus Torvalds .fsinfo = nfs_proc_fsinfo, 6721da177e4SLinus Torvalds .pathconf = nfs_proc_pathconf, 6731da177e4SLinus Torvalds .decode_dirent = nfs_decode_dirent, 6741da177e4SLinus Torvalds .read_setup = nfs_proc_read_setup, 6751da177e4SLinus Torvalds .write_setup = nfs_proc_write_setup, 6761da177e4SLinus Torvalds .commit_setup = nfs_proc_commit_setup, 6771da177e4SLinus Torvalds .file_open = nfs_open, 6781da177e4SLinus Torvalds .file_release = nfs_release, 6791da177e4SLinus Torvalds .lock = nfs_proc_lock, 6801da177e4SLinus Torvalds }; 681