4 * Copyright (C) 1992, 1993, 1994 Rick Sladkey
6 * OS-independent nfs remote procedure call functions
8 * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
9 * so at last we can have decent(ish) throughput off a
12 * Coding optimized and cleaned up by Florian La Roche.
13 * Note: Error returns are optimized for NFS_OK, which isn't translated via
14 * nfs_stat_to_errno(), but happens to be already the right return code.
16 * Also, the code currently doesn't check the size of the packet, when
17 * it decodes the packet.
19 * Feel free to fix it and mail me the diffs if it worries you.
21 * Completely rewritten to support the new RPC call interface;
22 * rewrote and moved the entire XDR stuff to xdr.c
23 * --Olaf Kirch June 1996
25 * The code below initializes all auto variables explicitly, otherwise
26 * it will fail to work as a module (gcc generates a memset call for an
30 #include <linux/types.h>
31 #include <linux/param.h>
32 #include <linux/slab.h>
33 #include <linux/time.h>
35 #include <linux/utsname.h>
36 #include <linux/errno.h>
37 #include <linux/string.h>
39 #include <linux/pagemap.h>
40 #include <linux/sunrpc/clnt.h>
41 #include <linux/nfs.h>
42 #include <linux/nfs2.h>
43 #include <linux/nfs_fs.h>
44 #include <linux/nfs_page.h>
45 #include <linux/lockd/bind.h>
48 #define NFSDBG_FACILITY NFSDBG_PROC
51 * Bare-bones access to getattr: this is for nfs_read_super.
54 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
55 struct nfs_fsinfo *info)
57 struct nfs_fattr *fattr = info->fattr;
58 struct nfs2_fsstat fsinfo;
59 struct rpc_message msg = {
60 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
66 dprintk("%s: call getattr\n", __FUNCTION__);
67 nfs_fattr_init(fattr);
68 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
69 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
72 dprintk("%s: call statfs\n", __FUNCTION__);
73 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
74 msg.rpc_resp = &fsinfo;
75 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
76 dprintk("%s: reply statfs: %d\n", __FUNCTION__, status);
79 info->rtmax = NFS_MAXDATA;
80 info->rtpref = fsinfo.tsize;
81 info->rtmult = fsinfo.bsize;
82 info->wtmax = NFS_MAXDATA;
83 info->wtpref = fsinfo.tsize;
84 info->wtmult = fsinfo.bsize;
85 info->dtpref = fsinfo.tsize;
86 info->maxfilesize = 0x7FFFFFFF;
92 * One function for each procedure in the NFS protocol.
95 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
96 struct nfs_fattr *fattr)
98 struct rpc_message msg = {
99 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
105 dprintk("NFS call getattr\n");
106 nfs_fattr_init(fattr);
107 status = rpc_call_sync(server->client, &msg, 0);
108 dprintk("NFS reply getattr: %d\n", status);
113 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
116 struct inode *inode = dentry->d_inode;
117 struct nfs_sattrargs arg = {
121 struct rpc_message msg = {
122 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR],
128 /* Mask out the non-modebit related stuff from attr->ia_mode */
129 sattr->ia_mode &= S_IALLUGO;
131 dprintk("NFS call setattr\n");
132 nfs_fattr_init(fattr);
133 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
135 nfs_setattr_update_inode(inode, sattr);
136 dprintk("NFS reply setattr: %d\n", status);
141 nfs_proc_lookup(struct inode *dir, struct qstr *name,
142 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
144 struct nfs_diropargs arg = {
149 struct nfs_diropok res = {
153 struct rpc_message msg = {
154 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
160 dprintk("NFS call lookup %s\n", name->name);
161 nfs_fattr_init(fattr);
162 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
163 dprintk("NFS reply lookup: %d\n", status);
167 static int nfs_proc_readlink(struct inode *inode, struct page *page,
168 unsigned int pgbase, unsigned int pglen)
170 struct nfs_readlinkargs args = {
176 struct rpc_message msg = {
177 .rpc_proc = &nfs_procedures[NFSPROC_READLINK],
182 dprintk("NFS call readlink\n");
183 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
184 dprintk("NFS reply readlink: %d\n", status);
189 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
190 int flags, struct nameidata *nd)
192 struct nfs_fh fhandle;
193 struct nfs_fattr fattr;
194 struct nfs_createargs arg = {
196 .name = dentry->d_name.name,
197 .len = dentry->d_name.len,
200 struct nfs_diropok res = {
204 struct rpc_message msg = {
205 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
211 nfs_fattr_init(&fattr);
212 dprintk("NFS call create %s\n", dentry->d_name.name);
213 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
214 nfs_mark_for_revalidate(dir);
216 status = nfs_instantiate(dentry, &fhandle, &fattr);
217 dprintk("NFS reply create: %d\n", status);
222 * In NFSv2, mknod is grafted onto the create call.
225 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
228 struct nfs_fh fhandle;
229 struct nfs_fattr fattr;
230 struct nfs_createargs arg = {
232 .name = dentry->d_name.name,
233 .len = dentry->d_name.len,
236 struct nfs_diropok res = {
240 struct rpc_message msg = {
241 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
247 dprintk("NFS call mknod %s\n", dentry->d_name.name);
249 mode = sattr->ia_mode;
250 if (S_ISFIFO(mode)) {
251 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
252 sattr->ia_valid &= ~ATTR_SIZE;
253 } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
254 sattr->ia_valid |= ATTR_SIZE;
255 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
258 nfs_fattr_init(&fattr);
259 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
260 nfs_mark_for_revalidate(dir);
262 if (status == -EINVAL && S_ISFIFO(mode)) {
263 sattr->ia_mode = mode;
264 nfs_fattr_init(&fattr);
265 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
268 status = nfs_instantiate(dentry, &fhandle, &fattr);
269 dprintk("NFS reply mknod: %d\n", status);
274 nfs_proc_remove(struct inode *dir, struct qstr *name)
276 struct nfs_removeargs arg = {
278 .name.len = name->len,
279 .name.name = name->name,
281 struct rpc_message msg = {
282 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
287 dprintk("NFS call remove %s\n", name->name);
288 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
289 nfs_mark_for_revalidate(dir);
291 dprintk("NFS reply remove: %d\n", status);
296 nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
298 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
301 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
303 nfs_mark_for_revalidate(dir);
308 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
309 struct inode *new_dir, struct qstr *new_name)
311 struct nfs_renameargs arg = {
312 .fromfh = NFS_FH(old_dir),
313 .fromname = old_name->name,
314 .fromlen = old_name->len,
315 .tofh = NFS_FH(new_dir),
316 .toname = new_name->name,
317 .tolen = new_name->len
319 struct rpc_message msg = {
320 .rpc_proc = &nfs_procedures[NFSPROC_RENAME],
325 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
326 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
327 nfs_mark_for_revalidate(old_dir);
328 nfs_mark_for_revalidate(new_dir);
329 dprintk("NFS reply rename: %d\n", status);
334 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
336 struct nfs_linkargs arg = {
337 .fromfh = NFS_FH(inode),
339 .toname = name->name,
342 struct rpc_message msg = {
343 .rpc_proc = &nfs_procedures[NFSPROC_LINK],
348 dprintk("NFS call link %s\n", name->name);
349 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
350 nfs_mark_for_revalidate(inode);
351 nfs_mark_for_revalidate(dir);
352 dprintk("NFS reply link: %d\n", status);
357 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
358 unsigned int len, struct iattr *sattr)
360 struct nfs_fh fhandle;
361 struct nfs_fattr fattr;
362 struct nfs_symlinkargs arg = {
363 .fromfh = NFS_FH(dir),
364 .fromname = dentry->d_name.name,
365 .fromlen = dentry->d_name.len,
370 struct rpc_message msg = {
371 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
376 if (len > NFS2_MAXPATHLEN)
377 return -ENAMETOOLONG;
379 dprintk("NFS call symlink %s\n", dentry->d_name.name);
381 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
382 nfs_mark_for_revalidate(dir);
385 * V2 SYMLINK requests don't return any attributes. Setting the
386 * filehandle size to zero indicates to nfs_instantiate that it
387 * should fill in the data with a LOOKUP call on the wire.
390 nfs_fattr_init(&fattr);
392 status = nfs_instantiate(dentry, &fhandle, &fattr);
395 dprintk("NFS reply symlink: %d\n", status);
400 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
402 struct nfs_fh fhandle;
403 struct nfs_fattr fattr;
404 struct nfs_createargs arg = {
406 .name = dentry->d_name.name,
407 .len = dentry->d_name.len,
410 struct nfs_diropok res = {
414 struct rpc_message msg = {
415 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
421 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
422 nfs_fattr_init(&fattr);
423 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
424 nfs_mark_for_revalidate(dir);
426 status = nfs_instantiate(dentry, &fhandle, &fattr);
427 dprintk("NFS reply mkdir: %d\n", status);
432 nfs_proc_rmdir(struct inode *dir, struct qstr *name)
434 struct nfs_diropargs arg = {
439 struct rpc_message msg = {
440 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
445 dprintk("NFS call rmdir %s\n", name->name);
446 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
447 nfs_mark_for_revalidate(dir);
448 dprintk("NFS reply rmdir: %d\n", status);
453 * The READDIR implementation is somewhat hackish - we pass a temporary
454 * buffer to the encode function, which installs it in the receive
455 * the receive iovec. The decode function just parses the reply to make
456 * sure it is syntactically correct; the entries itself are decoded
457 * from nfs_readdir by calling the decode_entry function directly.
460 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
461 u64 cookie, struct page *page, unsigned int count, int plus)
463 struct inode *dir = dentry->d_inode;
464 struct nfs_readdirargs arg = {
470 struct rpc_message msg = {
471 .rpc_proc = &nfs_procedures[NFSPROC_READDIR],
477 dprintk("NFS call readdir %d\n", (unsigned int)cookie);
478 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
480 nfs_invalidate_atime(dir);
482 dprintk("NFS reply readdir: %d\n", status);
487 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
488 struct nfs_fsstat *stat)
490 struct nfs2_fsstat fsinfo;
491 struct rpc_message msg = {
492 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
498 dprintk("NFS call statfs\n");
499 nfs_fattr_init(stat->fattr);
500 status = rpc_call_sync(server->client, &msg, 0);
501 dprintk("NFS reply statfs: %d\n", status);
504 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
505 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
506 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
515 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
516 struct nfs_fsinfo *info)
518 struct nfs2_fsstat fsinfo;
519 struct rpc_message msg = {
520 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
526 dprintk("NFS call fsinfo\n");
527 nfs_fattr_init(info->fattr);
528 status = rpc_call_sync(server->client, &msg, 0);
529 dprintk("NFS reply fsinfo: %d\n", status);
532 info->rtmax = NFS_MAXDATA;
533 info->rtpref = fsinfo.tsize;
534 info->rtmult = fsinfo.bsize;
535 info->wtmax = NFS_MAXDATA;
536 info->wtpref = fsinfo.tsize;
537 info->wtmult = fsinfo.bsize;
538 info->dtpref = fsinfo.tsize;
539 info->maxfilesize = 0x7FFFFFFF;
540 info->lease_time = 0;
546 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
547 struct nfs_pathconf *info)
550 info->max_namelen = NFS2_MAXNAMLEN;
554 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
556 nfs_invalidate_atime(data->inode);
557 if (task->tk_status >= 0) {
558 nfs_refresh_inode(data->inode, data->res.fattr);
559 /* Emulate the eof flag, which isn't normally needed in NFSv2
560 * as it is guaranteed to always return the file attributes
562 if (data->args.offset + data->args.count >= data->res.fattr->size)
568 static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
570 msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
573 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
575 if (task->tk_status >= 0)
576 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
580 static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
582 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
583 data->args.stable = NFS_FILE_SYNC;
584 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
588 nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
594 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
596 struct inode *inode = filp->f_path.dentry->d_inode;
598 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
602 const struct nfs_rpc_ops nfs_v2_clientops = {
603 .version = 2, /* protocol version */
604 .dentry_ops = &nfs_dentry_operations,
605 .dir_inode_ops = &nfs_dir_inode_operations,
606 .file_inode_ops = &nfs_file_inode_operations,
607 .getroot = nfs_proc_get_root,
608 .getattr = nfs_proc_getattr,
609 .setattr = nfs_proc_setattr,
610 .lookup = nfs_proc_lookup,
611 .access = NULL, /* access */
612 .readlink = nfs_proc_readlink,
613 .create = nfs_proc_create,
614 .remove = nfs_proc_remove,
615 .unlink_setup = nfs_proc_unlink_setup,
616 .unlink_done = nfs_proc_unlink_done,
617 .rename = nfs_proc_rename,
618 .link = nfs_proc_link,
619 .symlink = nfs_proc_symlink,
620 .mkdir = nfs_proc_mkdir,
621 .rmdir = nfs_proc_rmdir,
622 .readdir = nfs_proc_readdir,
623 .mknod = nfs_proc_mknod,
624 .statfs = nfs_proc_statfs,
625 .fsinfo = nfs_proc_fsinfo,
626 .pathconf = nfs_proc_pathconf,
627 .decode_dirent = nfs_decode_dirent,
628 .read_setup = nfs_proc_read_setup,
629 .read_done = nfs_read_done,
630 .write_setup = nfs_proc_write_setup,
631 .write_done = nfs_write_done,
632 .commit_setup = nfs_proc_commit_setup,
633 .file_open = nfs_open,
634 .file_release = nfs_release,
635 .lock = nfs_proc_lock,