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/time.h> 331da177e4SLinus Torvalds #include <linux/mm.h> 341da177e4SLinus Torvalds #include <linux/errno.h> 351da177e4SLinus Torvalds #include <linux/string.h> 361da177e4SLinus Torvalds #include <linux/in.h> 371da177e4SLinus Torvalds #include <linux/pagemap.h> 381da177e4SLinus Torvalds #include <linux/sunrpc/clnt.h> 391da177e4SLinus Torvalds #include <linux/nfs.h> 401da177e4SLinus Torvalds #include <linux/nfs2.h> 411da177e4SLinus Torvalds #include <linux/nfs_fs.h> 421da177e4SLinus Torvalds #include <linux/nfs_page.h> 431da177e4SLinus Torvalds #include <linux/lockd/bind.h> 44f7b422b1SDavid Howells #include "internal.h" 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #define NFSDBG_FACILITY NFSDBG_PROC 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds /* 4997cefcc6SJeff Layton * wrapper to handle the -EKEYEXPIRED error message. This should generally 5097cefcc6SJeff Layton * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't 5197cefcc6SJeff Layton * support the NFSERR_JUKEBOX error code, but we handle this situation in the 5297cefcc6SJeff Layton * same way that we handle that error with NFSv3. 5397cefcc6SJeff Layton */ 5497cefcc6SJeff Layton static int 5597cefcc6SJeff Layton nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 5697cefcc6SJeff Layton { 5797cefcc6SJeff Layton int res; 5897cefcc6SJeff Layton do { 5997cefcc6SJeff Layton res = rpc_call_sync(clnt, msg, flags); 6097cefcc6SJeff Layton if (res != -EKEYEXPIRED) 6197cefcc6SJeff Layton break; 6297cefcc6SJeff Layton schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); 6397cefcc6SJeff Layton res = -ERESTARTSYS; 6497cefcc6SJeff Layton } while (!fatal_signal_pending(current)); 6597cefcc6SJeff Layton return res; 6697cefcc6SJeff Layton } 6797cefcc6SJeff Layton 6897cefcc6SJeff Layton #define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags) 6997cefcc6SJeff Layton 7097cefcc6SJeff Layton static int 7197cefcc6SJeff Layton nfs_async_handle_expired_key(struct rpc_task *task) 7297cefcc6SJeff Layton { 7397cefcc6SJeff Layton if (task->tk_status != -EKEYEXPIRED) 7497cefcc6SJeff Layton return 0; 7597cefcc6SJeff Layton task->tk_status = 0; 7697cefcc6SJeff Layton rpc_restart_call(task); 7797cefcc6SJeff Layton rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 7897cefcc6SJeff Layton return 1; 7997cefcc6SJeff Layton } 8097cefcc6SJeff Layton 8197cefcc6SJeff Layton /* 821da177e4SLinus Torvalds * Bare-bones access to getattr: this is for nfs_read_super. 831da177e4SLinus Torvalds */ 841da177e4SLinus Torvalds static int 851da177e4SLinus Torvalds nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 861da177e4SLinus Torvalds struct nfs_fsinfo *info) 871da177e4SLinus Torvalds { 881da177e4SLinus Torvalds struct nfs_fattr *fattr = info->fattr; 891da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 90dead28daSChuck Lever struct rpc_message msg = { 91dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 92dead28daSChuck Lever .rpc_argp = fhandle, 93dead28daSChuck Lever .rpc_resp = fattr, 94dead28daSChuck Lever }; 951da177e4SLinus Torvalds int status; 961da177e4SLinus Torvalds 973110ff80SHarvey Harrison dprintk("%s: call getattr\n", __func__); 980e574af1STrond Myklebust nfs_fattr_init(fattr); 9937ca8f5cSEG Keizer status = rpc_call_sync(server->client, &msg, 0); 10037ca8f5cSEG Keizer /* Retry with default authentication if different */ 10137ca8f5cSEG Keizer if (status && server->nfs_client->cl_rpcclient != server->client) 1025006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 1033110ff80SHarvey Harrison dprintk("%s: reply getattr: %d\n", __func__, status); 1041da177e4SLinus Torvalds if (status) 1051da177e4SLinus Torvalds return status; 1063110ff80SHarvey Harrison dprintk("%s: call statfs\n", __func__); 107dead28daSChuck Lever msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 108dead28daSChuck Lever msg.rpc_resp = &fsinfo; 10937ca8f5cSEG Keizer status = rpc_call_sync(server->client, &msg, 0); 11037ca8f5cSEG Keizer /* Retry with default authentication if different */ 11137ca8f5cSEG Keizer if (status && server->nfs_client->cl_rpcclient != server->client) 1125006a76cSDavid Howells status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 1133110ff80SHarvey Harrison dprintk("%s: reply statfs: %d\n", __func__, status); 1141da177e4SLinus Torvalds if (status) 1151da177e4SLinus Torvalds return status; 1161da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 1171da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 1181da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 1191da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 1201da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 1211da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 1221da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 1231da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 1241da177e4SLinus Torvalds info->lease_time = 0; 1251da177e4SLinus Torvalds return 0; 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds /* 1291da177e4SLinus Torvalds * One function for each procedure in the NFS protocol. 1301da177e4SLinus Torvalds */ 1311da177e4SLinus Torvalds static int 1321da177e4SLinus Torvalds nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 1331da177e4SLinus Torvalds struct nfs_fattr *fattr) 1341da177e4SLinus Torvalds { 135dead28daSChuck Lever struct rpc_message msg = { 136dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 137dead28daSChuck Lever .rpc_argp = fhandle, 138dead28daSChuck Lever .rpc_resp = fattr, 139dead28daSChuck Lever }; 1401da177e4SLinus Torvalds int status; 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds dprintk("NFS call getattr\n"); 1430e574af1STrond Myklebust nfs_fattr_init(fattr); 144dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 1451da177e4SLinus Torvalds dprintk("NFS reply getattr: %d\n", status); 1461da177e4SLinus Torvalds return status; 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds static int 1501da177e4SLinus Torvalds nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 1511da177e4SLinus Torvalds struct iattr *sattr) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 1541da177e4SLinus Torvalds struct nfs_sattrargs arg = { 1551da177e4SLinus Torvalds .fh = NFS_FH(inode), 1561da177e4SLinus Torvalds .sattr = sattr 1571da177e4SLinus Torvalds }; 158dead28daSChuck Lever struct rpc_message msg = { 159dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 160dead28daSChuck Lever .rpc_argp = &arg, 161dead28daSChuck Lever .rpc_resp = fattr, 162dead28daSChuck Lever }; 1631da177e4SLinus Torvalds int status; 1641da177e4SLinus Torvalds 165cf3fff54STrond Myklebust /* Mask out the non-modebit related stuff from attr->ia_mode */ 166cf3fff54STrond Myklebust sattr->ia_mode &= S_IALLUGO; 167cf3fff54STrond Myklebust 1681da177e4SLinus Torvalds dprintk("NFS call setattr\n"); 169659bfcd6STrond Myklebust if (sattr->ia_valid & ATTR_FILE) 170659bfcd6STrond Myklebust msg.rpc_cred = nfs_file_cred(sattr->ia_file); 1710e574af1STrond Myklebust nfs_fattr_init(fattr); 172dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 17365e4308dSTrond Myklebust if (status == 0) 17465e4308dSTrond Myklebust nfs_setattr_update_inode(inode, sattr); 1751da177e4SLinus Torvalds dprintk("NFS reply setattr: %d\n", status); 1761da177e4SLinus Torvalds return status; 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds static int 1801da177e4SLinus Torvalds nfs_proc_lookup(struct inode *dir, struct qstr *name, 1811da177e4SLinus Torvalds struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1821da177e4SLinus Torvalds { 1831da177e4SLinus Torvalds struct nfs_diropargs arg = { 1841da177e4SLinus Torvalds .fh = NFS_FH(dir), 1851da177e4SLinus Torvalds .name = name->name, 1861da177e4SLinus Torvalds .len = name->len 1871da177e4SLinus Torvalds }; 1881da177e4SLinus Torvalds struct nfs_diropok res = { 1891da177e4SLinus Torvalds .fh = fhandle, 1901da177e4SLinus Torvalds .fattr = fattr 1911da177e4SLinus Torvalds }; 192dead28daSChuck Lever struct rpc_message msg = { 193dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 194dead28daSChuck Lever .rpc_argp = &arg, 195dead28daSChuck Lever .rpc_resp = &res, 196dead28daSChuck Lever }; 1971da177e4SLinus Torvalds int status; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds dprintk("NFS call lookup %s\n", name->name); 2000e574af1STrond Myklebust nfs_fattr_init(fattr); 201dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2021da177e4SLinus Torvalds dprintk("NFS reply lookup: %d\n", status); 2031da177e4SLinus Torvalds return status; 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds static int nfs_proc_readlink(struct inode *inode, struct page *page, 2071da177e4SLinus Torvalds unsigned int pgbase, unsigned int pglen) 2081da177e4SLinus Torvalds { 2091da177e4SLinus Torvalds struct nfs_readlinkargs args = { 2101da177e4SLinus Torvalds .fh = NFS_FH(inode), 2111da177e4SLinus Torvalds .pgbase = pgbase, 2121da177e4SLinus Torvalds .pglen = pglen, 2131da177e4SLinus Torvalds .pages = &page 2141da177e4SLinus Torvalds }; 215dead28daSChuck Lever struct rpc_message msg = { 216dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 217dead28daSChuck Lever .rpc_argp = &args, 218dead28daSChuck Lever }; 2191da177e4SLinus Torvalds int status; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds dprintk("NFS call readlink\n"); 222dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 2231da177e4SLinus Torvalds dprintk("NFS reply readlink: %d\n", status); 2241da177e4SLinus Torvalds return status; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds 227eb872f0cSTrond Myklebust struct nfs_createdata { 228eb872f0cSTrond Myklebust struct nfs_createargs arg; 229eb872f0cSTrond Myklebust struct nfs_diropok res; 230eb872f0cSTrond Myklebust struct nfs_fh fhandle; 231eb872f0cSTrond Myklebust struct nfs_fattr fattr; 232eb872f0cSTrond Myklebust }; 233eb872f0cSTrond Myklebust 234eb872f0cSTrond Myklebust static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir, 235eb872f0cSTrond Myklebust struct dentry *dentry, struct iattr *sattr) 236eb872f0cSTrond Myklebust { 237eb872f0cSTrond Myklebust struct nfs_createdata *data; 238eb872f0cSTrond Myklebust 239eb872f0cSTrond Myklebust data = kmalloc(sizeof(*data), GFP_KERNEL); 240eb872f0cSTrond Myklebust 241eb872f0cSTrond Myklebust if (data != NULL) { 242eb872f0cSTrond Myklebust data->arg.fh = NFS_FH(dir); 243eb872f0cSTrond Myklebust data->arg.name = dentry->d_name.name; 244eb872f0cSTrond Myklebust data->arg.len = dentry->d_name.len; 245eb872f0cSTrond Myklebust data->arg.sattr = sattr; 246eb872f0cSTrond Myklebust nfs_fattr_init(&data->fattr); 247eb872f0cSTrond Myklebust data->fhandle.size = 0; 248eb872f0cSTrond Myklebust data->res.fh = &data->fhandle; 249eb872f0cSTrond Myklebust data->res.fattr = &data->fattr; 250eb872f0cSTrond Myklebust } 251eb872f0cSTrond Myklebust return data; 252eb872f0cSTrond Myklebust }; 253eb872f0cSTrond Myklebust 254eb872f0cSTrond Myklebust static void nfs_free_createdata(const struct nfs_createdata *data) 255eb872f0cSTrond Myklebust { 256eb872f0cSTrond Myklebust kfree(data); 257eb872f0cSTrond Myklebust } 258eb872f0cSTrond Myklebust 2591da177e4SLinus Torvalds static int 2601da177e4SLinus Torvalds nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 26102a913a7STrond Myklebust int flags, struct nameidata *nd) 2621da177e4SLinus Torvalds { 263eb872f0cSTrond Myklebust struct nfs_createdata *data; 264dead28daSChuck Lever struct rpc_message msg = { 265dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 266dead28daSChuck Lever }; 267eb872f0cSTrond Myklebust int status = -ENOMEM; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds dprintk("NFS call create %s\n", dentry->d_name.name); 270eb872f0cSTrond Myklebust data = nfs_alloc_createdata(dir, dentry, sattr); 271eb872f0cSTrond Myklebust if (data == NULL) 272eb872f0cSTrond Myklebust goto out; 273eb872f0cSTrond Myklebust msg.rpc_argp = &data->arg; 274eb872f0cSTrond Myklebust msg.rpc_resp = &data->res; 275dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 276bad2a524STrond Myklebust nfs_mark_for_revalidate(dir); 2771da177e4SLinus Torvalds if (status == 0) 278eb872f0cSTrond Myklebust status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 279eb872f0cSTrond Myklebust nfs_free_createdata(data); 280eb872f0cSTrond Myklebust out: 2811da177e4SLinus Torvalds dprintk("NFS reply create: %d\n", status); 2821da177e4SLinus Torvalds return status; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds /* 2861da177e4SLinus Torvalds * In NFSv2, mknod is grafted onto the create call. 2871da177e4SLinus Torvalds */ 2881da177e4SLinus Torvalds static int 2891da177e4SLinus Torvalds nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2901da177e4SLinus Torvalds dev_t rdev) 2911da177e4SLinus Torvalds { 292eb872f0cSTrond Myklebust struct nfs_createdata *data; 293dead28daSChuck Lever struct rpc_message msg = { 294dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 295dead28daSChuck Lever }; 296eb872f0cSTrond Myklebust umode_t mode; 297eb872f0cSTrond Myklebust int status = -ENOMEM; 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds dprintk("NFS call mknod %s\n", dentry->d_name.name); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds mode = sattr->ia_mode; 3021da177e4SLinus Torvalds if (S_ISFIFO(mode)) { 3031da177e4SLinus Torvalds sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 3041da177e4SLinus Torvalds sattr->ia_valid &= ~ATTR_SIZE; 3051da177e4SLinus Torvalds } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 3061da177e4SLinus Torvalds sattr->ia_valid |= ATTR_SIZE; 3071da177e4SLinus Torvalds sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 310eb872f0cSTrond Myklebust data = nfs_alloc_createdata(dir, dentry, sattr); 311eb872f0cSTrond Myklebust if (data == NULL) 312eb872f0cSTrond Myklebust goto out; 313eb872f0cSTrond Myklebust msg.rpc_argp = &data->arg; 314eb872f0cSTrond Myklebust msg.rpc_resp = &data->res; 315eb872f0cSTrond Myklebust 316dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 317decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds if (status == -EINVAL && S_ISFIFO(mode)) { 3201da177e4SLinus Torvalds sattr->ia_mode = mode; 321eb872f0cSTrond Myklebust nfs_fattr_init(data->res.fattr); 322dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds if (status == 0) 325eb872f0cSTrond Myklebust status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 326eb872f0cSTrond Myklebust nfs_free_createdata(data); 327eb872f0cSTrond Myklebust out: 3281da177e4SLinus Torvalds dprintk("NFS reply mknod: %d\n", status); 3291da177e4SLinus Torvalds return status; 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds static int 3331da177e4SLinus Torvalds nfs_proc_remove(struct inode *dir, struct qstr *name) 3341da177e4SLinus Torvalds { 3354fdc17b2STrond Myklebust struct nfs_removeargs arg = { 3361da177e4SLinus Torvalds .fh = NFS_FH(dir), 3374fdc17b2STrond Myklebust .name.len = name->len, 3384fdc17b2STrond Myklebust .name.name = name->name, 3391da177e4SLinus Torvalds }; 3401da177e4SLinus Torvalds struct rpc_message msg = { 3411da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 3421da177e4SLinus Torvalds .rpc_argp = &arg, 3431da177e4SLinus Torvalds }; 3441da177e4SLinus Torvalds int status; 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds dprintk("NFS call remove %s\n", name->name); 3471da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 348decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds dprintk("NFS reply remove: %d\n", status); 3511da177e4SLinus Torvalds return status; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds 354e4eff1a6STrond Myklebust static void 355e4eff1a6STrond Myklebust nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 3561da177e4SLinus Torvalds { 3571da177e4SLinus Torvalds msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 360e4eff1a6STrond Myklebust static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3611da177e4SLinus Torvalds { 36297cefcc6SJeff Layton if (nfs_async_handle_expired_key(task)) 36397cefcc6SJeff Layton return 0; 364e4eff1a6STrond Myklebust nfs_mark_for_revalidate(dir); 365e4eff1a6STrond Myklebust return 1; 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds static int 3691da177e4SLinus Torvalds nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 3701da177e4SLinus Torvalds struct inode *new_dir, struct qstr *new_name) 3711da177e4SLinus Torvalds { 3721da177e4SLinus Torvalds struct nfs_renameargs arg = { 3731da177e4SLinus Torvalds .fromfh = NFS_FH(old_dir), 3741da177e4SLinus Torvalds .fromname = old_name->name, 3751da177e4SLinus Torvalds .fromlen = old_name->len, 3761da177e4SLinus Torvalds .tofh = NFS_FH(new_dir), 3771da177e4SLinus Torvalds .toname = new_name->name, 3781da177e4SLinus Torvalds .tolen = new_name->len 3791da177e4SLinus Torvalds }; 380dead28daSChuck Lever struct rpc_message msg = { 381dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 382dead28daSChuck Lever .rpc_argp = &arg, 383dead28daSChuck Lever }; 3841da177e4SLinus Torvalds int status; 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 387dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 388decf491fSTrond Myklebust nfs_mark_for_revalidate(old_dir); 389decf491fSTrond Myklebust nfs_mark_for_revalidate(new_dir); 3901da177e4SLinus Torvalds dprintk("NFS reply rename: %d\n", status); 3911da177e4SLinus Torvalds return status; 3921da177e4SLinus Torvalds } 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds static int 3951da177e4SLinus Torvalds nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3961da177e4SLinus Torvalds { 3971da177e4SLinus Torvalds struct nfs_linkargs arg = { 3981da177e4SLinus Torvalds .fromfh = NFS_FH(inode), 3991da177e4SLinus Torvalds .tofh = NFS_FH(dir), 4001da177e4SLinus Torvalds .toname = name->name, 4011da177e4SLinus Torvalds .tolen = name->len 4021da177e4SLinus Torvalds }; 403dead28daSChuck Lever struct rpc_message msg = { 404dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_LINK], 405dead28daSChuck Lever .rpc_argp = &arg, 406dead28daSChuck Lever }; 4071da177e4SLinus Torvalds int status; 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds dprintk("NFS call link %s\n", name->name); 410dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 4115ba7cc48STrond Myklebust nfs_mark_for_revalidate(inode); 412decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4131da177e4SLinus Torvalds dprintk("NFS reply link: %d\n", status); 4141da177e4SLinus Torvalds return status; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds static int 41894a6d753SChuck Lever nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 41994a6d753SChuck Lever unsigned int len, struct iattr *sattr) 4201da177e4SLinus Torvalds { 4214f390c15SChuck Lever struct nfs_fh fhandle; 4224f390c15SChuck Lever struct nfs_fattr fattr; 4231da177e4SLinus Torvalds struct nfs_symlinkargs arg = { 4241da177e4SLinus Torvalds .fromfh = NFS_FH(dir), 4254f390c15SChuck Lever .fromname = dentry->d_name.name, 4264f390c15SChuck Lever .fromlen = dentry->d_name.len, 42794a6d753SChuck Lever .pages = &page, 42894a6d753SChuck Lever .pathlen = len, 4291da177e4SLinus Torvalds .sattr = sattr 4301da177e4SLinus Torvalds }; 431dead28daSChuck Lever struct rpc_message msg = { 432dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 433dead28daSChuck Lever .rpc_argp = &arg, 434dead28daSChuck Lever }; 4351da177e4SLinus Torvalds int status; 4361da177e4SLinus Torvalds 43794a6d753SChuck Lever if (len > NFS2_MAXPATHLEN) 4381da177e4SLinus Torvalds return -ENAMETOOLONG; 4394f390c15SChuck Lever 44094a6d753SChuck Lever dprintk("NFS call symlink %s\n", dentry->d_name.name); 44194a6d753SChuck Lever 442dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 443decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4444f390c15SChuck Lever 4454f390c15SChuck Lever /* 4464f390c15SChuck Lever * V2 SYMLINK requests don't return any attributes. Setting the 4474f390c15SChuck Lever * filehandle size to zero indicates to nfs_instantiate that it 4484f390c15SChuck Lever * should fill in the data with a LOOKUP call on the wire. 4494f390c15SChuck Lever */ 4504f390c15SChuck Lever if (status == 0) { 4514f390c15SChuck Lever nfs_fattr_init(&fattr); 4524f390c15SChuck Lever fhandle.size = 0; 4534f390c15SChuck Lever status = nfs_instantiate(dentry, &fhandle, &fattr); 4544f390c15SChuck Lever } 4554f390c15SChuck Lever 4561da177e4SLinus Torvalds dprintk("NFS reply symlink: %d\n", status); 4571da177e4SLinus Torvalds return status; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds static int 4611da177e4SLinus Torvalds nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 4621da177e4SLinus Torvalds { 463eb872f0cSTrond Myklebust struct nfs_createdata *data; 464dead28daSChuck Lever struct rpc_message msg = { 465dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 466dead28daSChuck Lever }; 467eb872f0cSTrond Myklebust int status = -ENOMEM; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds dprintk("NFS call mkdir %s\n", dentry->d_name.name); 470eb872f0cSTrond Myklebust data = nfs_alloc_createdata(dir, dentry, sattr); 471eb872f0cSTrond Myklebust if (data == NULL) 472eb872f0cSTrond Myklebust goto out; 473eb872f0cSTrond Myklebust msg.rpc_argp = &data->arg; 474eb872f0cSTrond Myklebust msg.rpc_resp = &data->res; 475eb872f0cSTrond Myklebust 476dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 477decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 4781da177e4SLinus Torvalds if (status == 0) 479eb872f0cSTrond Myklebust status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 480eb872f0cSTrond Myklebust nfs_free_createdata(data); 481eb872f0cSTrond Myklebust out: 4821da177e4SLinus Torvalds dprintk("NFS reply mkdir: %d\n", status); 4831da177e4SLinus Torvalds return status; 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds static int 4871da177e4SLinus Torvalds nfs_proc_rmdir(struct inode *dir, struct qstr *name) 4881da177e4SLinus Torvalds { 4891da177e4SLinus Torvalds struct nfs_diropargs arg = { 4901da177e4SLinus Torvalds .fh = NFS_FH(dir), 4911da177e4SLinus Torvalds .name = name->name, 4921da177e4SLinus Torvalds .len = name->len 4931da177e4SLinus Torvalds }; 494dead28daSChuck Lever struct rpc_message msg = { 495dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 496dead28daSChuck Lever .rpc_argp = &arg, 497dead28daSChuck Lever }; 4981da177e4SLinus Torvalds int status; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds dprintk("NFS call rmdir %s\n", name->name); 501dead28daSChuck Lever status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 502decf491fSTrond Myklebust nfs_mark_for_revalidate(dir); 5031da177e4SLinus Torvalds dprintk("NFS reply rmdir: %d\n", status); 5041da177e4SLinus Torvalds return status; 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds /* 5081da177e4SLinus Torvalds * The READDIR implementation is somewhat hackish - we pass a temporary 5091da177e4SLinus Torvalds * buffer to the encode function, which installs it in the receive 5101da177e4SLinus Torvalds * the receive iovec. The decode function just parses the reply to make 5111da177e4SLinus Torvalds * sure it is syntactically correct; the entries itself are decoded 5121da177e4SLinus Torvalds * from nfs_readdir by calling the decode_entry function directly. 5131da177e4SLinus Torvalds */ 5141da177e4SLinus Torvalds static int 5151da177e4SLinus Torvalds nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 5161da177e4SLinus Torvalds u64 cookie, struct page *page, unsigned int count, int plus) 5171da177e4SLinus Torvalds { 5181da177e4SLinus Torvalds struct inode *dir = dentry->d_inode; 5191da177e4SLinus Torvalds struct nfs_readdirargs arg = { 5201da177e4SLinus Torvalds .fh = NFS_FH(dir), 5211da177e4SLinus Torvalds .cookie = cookie, 5221da177e4SLinus Torvalds .count = count, 523dead28daSChuck Lever .pages = &page, 5241da177e4SLinus Torvalds }; 5251da177e4SLinus Torvalds struct rpc_message msg = { 5261da177e4SLinus Torvalds .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 5271da177e4SLinus Torvalds .rpc_argp = &arg, 528dead28daSChuck Lever .rpc_cred = cred, 5291da177e4SLinus Torvalds }; 5301da177e4SLinus Torvalds int status; 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds dprintk("NFS call readdir %d\n", (unsigned int)cookie); 5331da177e4SLinus Torvalds status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 5341da177e4SLinus Torvalds 535c4812998STrond Myklebust nfs_invalidate_atime(dir); 536c4812998STrond Myklebust 5371da177e4SLinus Torvalds dprintk("NFS reply readdir: %d\n", status); 5381da177e4SLinus Torvalds return status; 5391da177e4SLinus Torvalds } 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds static int 5421da177e4SLinus Torvalds nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5431da177e4SLinus Torvalds struct nfs_fsstat *stat) 5441da177e4SLinus Torvalds { 5451da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 546dead28daSChuck Lever struct rpc_message msg = { 547dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 548dead28daSChuck Lever .rpc_argp = fhandle, 549dead28daSChuck Lever .rpc_resp = &fsinfo, 550dead28daSChuck Lever }; 5511da177e4SLinus Torvalds int status; 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds dprintk("NFS call statfs\n"); 5540e574af1STrond Myklebust nfs_fattr_init(stat->fattr); 555dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5561da177e4SLinus Torvalds dprintk("NFS reply statfs: %d\n", status); 5571da177e4SLinus Torvalds if (status) 5581da177e4SLinus Torvalds goto out; 5591da177e4SLinus Torvalds stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 5601da177e4SLinus Torvalds stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 5611da177e4SLinus Torvalds stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 5621da177e4SLinus Torvalds stat->tfiles = 0; 5631da177e4SLinus Torvalds stat->ffiles = 0; 5641da177e4SLinus Torvalds stat->afiles = 0; 5651da177e4SLinus Torvalds out: 5661da177e4SLinus Torvalds return status; 5671da177e4SLinus Torvalds } 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds static int 5701da177e4SLinus Torvalds nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5711da177e4SLinus Torvalds struct nfs_fsinfo *info) 5721da177e4SLinus Torvalds { 5731da177e4SLinus Torvalds struct nfs2_fsstat fsinfo; 574dead28daSChuck Lever struct rpc_message msg = { 575dead28daSChuck Lever .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 576dead28daSChuck Lever .rpc_argp = fhandle, 577dead28daSChuck Lever .rpc_resp = &fsinfo, 578dead28daSChuck Lever }; 5791da177e4SLinus Torvalds int status; 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds dprintk("NFS call fsinfo\n"); 5820e574af1STrond Myklebust nfs_fattr_init(info->fattr); 583dead28daSChuck Lever status = rpc_call_sync(server->client, &msg, 0); 5841da177e4SLinus Torvalds dprintk("NFS reply fsinfo: %d\n", status); 5851da177e4SLinus Torvalds if (status) 5861da177e4SLinus Torvalds goto out; 5871da177e4SLinus Torvalds info->rtmax = NFS_MAXDATA; 5881da177e4SLinus Torvalds info->rtpref = fsinfo.tsize; 5891da177e4SLinus Torvalds info->rtmult = fsinfo.bsize; 5901da177e4SLinus Torvalds info->wtmax = NFS_MAXDATA; 5911da177e4SLinus Torvalds info->wtpref = fsinfo.tsize; 5921da177e4SLinus Torvalds info->wtmult = fsinfo.bsize; 5931da177e4SLinus Torvalds info->dtpref = fsinfo.tsize; 5941da177e4SLinus Torvalds info->maxfilesize = 0x7FFFFFFF; 5951da177e4SLinus Torvalds info->lease_time = 0; 5961da177e4SLinus Torvalds out: 5971da177e4SLinus Torvalds return status; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds static int 6011da177e4SLinus Torvalds nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 6021da177e4SLinus Torvalds struct nfs_pathconf *info) 6031da177e4SLinus Torvalds { 6041da177e4SLinus Torvalds info->max_link = 0; 6051da177e4SLinus Torvalds info->max_namelen = NFS2_MAXNAMLEN; 6061da177e4SLinus Torvalds return 0; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 609ec06c096STrond Myklebust static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 6101da177e4SLinus Torvalds { 61197cefcc6SJeff Layton if (nfs_async_handle_expired_key(task)) 61297cefcc6SJeff Layton return -EAGAIN; 61397cefcc6SJeff Layton 6148850df99STrond Myklebust nfs_invalidate_atime(data->inode); 6151da177e4SLinus Torvalds if (task->tk_status >= 0) { 6161da177e4SLinus Torvalds nfs_refresh_inode(data->inode, data->res.fattr); 6171da177e4SLinus Torvalds /* Emulate the eof flag, which isn't normally needed in NFSv2 6181da177e4SLinus Torvalds * as it is guaranteed to always return the file attributes 6191da177e4SLinus Torvalds */ 6201da177e4SLinus Torvalds if (data->args.offset + data->args.count >= data->res.fattr->size) 6211da177e4SLinus Torvalds data->res.eof = 1; 6221da177e4SLinus Torvalds } 623ec06c096STrond Myklebust return 0; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds 626bdc7f021STrond Myklebust static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 6271da177e4SLinus Torvalds { 628bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 631788e7a89STrond Myklebust static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 6321da177e4SLinus Torvalds { 63397cefcc6SJeff Layton if (nfs_async_handle_expired_key(task)) 63497cefcc6SJeff Layton return -EAGAIN; 63597cefcc6SJeff Layton 6361da177e4SLinus Torvalds if (task->tk_status >= 0) 63770ca8852STrond Myklebust nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); 638788e7a89STrond Myklebust return 0; 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds 641bdc7f021STrond Myklebust static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 6421da177e4SLinus Torvalds { 6431da177e4SLinus Torvalds /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 6441da177e4SLinus Torvalds data->args.stable = NFS_FILE_SYNC; 645bdc7f021STrond Myklebust msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds static void 649bdc7f021STrond Myklebust nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 6501da177e4SLinus Torvalds { 6511da177e4SLinus Torvalds BUG(); 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds static int 6551da177e4SLinus Torvalds nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 6561da177e4SLinus Torvalds { 6571093a60eSChuck Lever struct inode *inode = filp->f_path.dentry->d_inode; 6581093a60eSChuck Lever 6591093a60eSChuck Lever return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 6622116271aSTrond Myklebust /* Helper functions for NFS lock bounds checking */ 6632116271aSTrond Myklebust #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 6642116271aSTrond Myklebust static int nfs_lock_check_bounds(const struct file_lock *fl) 6652116271aSTrond Myklebust { 6662116271aSTrond Myklebust __s32 start, end; 6672116271aSTrond Myklebust 6682116271aSTrond Myklebust start = (__s32)fl->fl_start; 6692116271aSTrond Myklebust if ((loff_t)start != fl->fl_start) 6702116271aSTrond Myklebust goto out_einval; 6712116271aSTrond Myklebust 6722116271aSTrond Myklebust if (fl->fl_end != OFFSET_MAX) { 6732116271aSTrond Myklebust end = (__s32)fl->fl_end; 6742116271aSTrond Myklebust if ((loff_t)end != fl->fl_end) 6752116271aSTrond Myklebust goto out_einval; 6762116271aSTrond Myklebust } else 6772116271aSTrond Myklebust end = NFS_LOCK32_OFFSET_MAX; 6782116271aSTrond Myklebust 6792116271aSTrond Myklebust if (start < 0 || start > end) 6802116271aSTrond Myklebust goto out_einval; 6812116271aSTrond Myklebust return 0; 6822116271aSTrond Myklebust out_einval: 6832116271aSTrond Myklebust return -EINVAL; 6842116271aSTrond Myklebust } 6851da177e4SLinus Torvalds 686509de811SDavid Howells const struct nfs_rpc_ops nfs_v2_clientops = { 6871da177e4SLinus Torvalds .version = 2, /* protocol version */ 6881da177e4SLinus Torvalds .dentry_ops = &nfs_dentry_operations, 6891da177e4SLinus Torvalds .dir_inode_ops = &nfs_dir_inode_operations, 69092cfc62cSJ. Bruce Fields .file_inode_ops = &nfs_file_inode_operations, 6911da177e4SLinus Torvalds .getroot = nfs_proc_get_root, 6921da177e4SLinus Torvalds .getattr = nfs_proc_getattr, 6931da177e4SLinus Torvalds .setattr = nfs_proc_setattr, 6941da177e4SLinus Torvalds .lookup = nfs_proc_lookup, 6951da177e4SLinus Torvalds .access = NULL, /* access */ 6961da177e4SLinus Torvalds .readlink = nfs_proc_readlink, 6971da177e4SLinus Torvalds .create = nfs_proc_create, 6981da177e4SLinus Torvalds .remove = nfs_proc_remove, 6991da177e4SLinus Torvalds .unlink_setup = nfs_proc_unlink_setup, 7001da177e4SLinus Torvalds .unlink_done = nfs_proc_unlink_done, 7011da177e4SLinus Torvalds .rename = nfs_proc_rename, 7021da177e4SLinus Torvalds .link = nfs_proc_link, 7031da177e4SLinus Torvalds .symlink = nfs_proc_symlink, 7041da177e4SLinus Torvalds .mkdir = nfs_proc_mkdir, 7051da177e4SLinus Torvalds .rmdir = nfs_proc_rmdir, 7061da177e4SLinus Torvalds .readdir = nfs_proc_readdir, 7071da177e4SLinus Torvalds .mknod = nfs_proc_mknod, 7081da177e4SLinus Torvalds .statfs = nfs_proc_statfs, 7091da177e4SLinus Torvalds .fsinfo = nfs_proc_fsinfo, 7101da177e4SLinus Torvalds .pathconf = nfs_proc_pathconf, 7111da177e4SLinus Torvalds .decode_dirent = nfs_decode_dirent, 7121da177e4SLinus Torvalds .read_setup = nfs_proc_read_setup, 713ec06c096STrond Myklebust .read_done = nfs_read_done, 7141da177e4SLinus Torvalds .write_setup = nfs_proc_write_setup, 715788e7a89STrond Myklebust .write_done = nfs_write_done, 7161da177e4SLinus Torvalds .commit_setup = nfs_proc_commit_setup, 7171da177e4SLinus Torvalds .lock = nfs_proc_lock, 7182116271aSTrond Myklebust .lock_check_bounds = nfs_lock_check_bounds, 7197fe5c398STrond Myklebust .close_context = nfs_close_context, 7201da177e4SLinus Torvalds }; 721