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>
46 #include <linux/smp_lock.h>
48 #define NFSDBG_FACILITY NFSDBG_PROC
50 extern struct rpc_procinfo nfs_procedures[];
53 * Bare-bones access to getattr: this is for nfs_read_super.
56 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
57 struct nfs_fsinfo *info)
59 struct nfs_fattr *fattr = info->fattr;
60 struct nfs2_fsstat fsinfo;
61 struct rpc_message msg = {
62 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
68 dprintk("%s: call getattr\n", __FUNCTION__);
69 nfs_fattr_init(fattr);
70 status = rpc_call_sync(server->client_sys, &msg, 0);
71 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
74 dprintk("%s: call statfs\n", __FUNCTION__);
75 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
76 msg.rpc_resp = &fsinfo;
77 status = rpc_call_sync(server->client_sys, &msg, 0);
78 dprintk("%s: reply statfs: %d\n", __FUNCTION__, status);
81 info->rtmax = NFS_MAXDATA;
82 info->rtpref = fsinfo.tsize;
83 info->rtmult = fsinfo.bsize;
84 info->wtmax = NFS_MAXDATA;
85 info->wtpref = fsinfo.tsize;
86 info->wtmult = fsinfo.bsize;
87 info->dtpref = fsinfo.tsize;
88 info->maxfilesize = 0x7FFFFFFF;
94 * One function for each procedure in the NFS protocol.
97 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
98 struct nfs_fattr *fattr)
100 struct rpc_message msg = {
101 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
107 dprintk("NFS call getattr\n");
108 nfs_fattr_init(fattr);
109 status = rpc_call_sync(server->client, &msg, 0);
110 dprintk("NFS reply getattr: %d\n", status);
115 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
118 struct inode *inode = dentry->d_inode;
119 struct nfs_sattrargs arg = {
123 struct rpc_message msg = {
124 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR],
130 /* Mask out the non-modebit related stuff from attr->ia_mode */
131 sattr->ia_mode &= S_IALLUGO;
133 dprintk("NFS call setattr\n");
134 nfs_fattr_init(fattr);
135 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
137 nfs_setattr_update_inode(inode, sattr);
138 dprintk("NFS reply setattr: %d\n", status);
143 nfs_proc_lookup(struct inode *dir, struct qstr *name,
144 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
146 struct nfs_diropargs arg = {
151 struct nfs_diropok res = {
155 struct rpc_message msg = {
156 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
162 dprintk("NFS call lookup %s\n", name->name);
163 nfs_fattr_init(fattr);
164 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
165 dprintk("NFS reply lookup: %d\n", status);
169 static int nfs_proc_readlink(struct inode *inode, struct page *page,
170 unsigned int pgbase, unsigned int pglen)
172 struct nfs_readlinkargs args = {
178 struct rpc_message msg = {
179 .rpc_proc = &nfs_procedures[NFSPROC_READLINK],
184 dprintk("NFS call readlink\n");
185 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
186 dprintk("NFS reply readlink: %d\n", status);
190 static int nfs_proc_read(struct nfs_read_data *rdata)
192 int flags = rdata->flags;
193 struct inode * inode = rdata->inode;
194 struct nfs_fattr * fattr = rdata->res.fattr;
195 struct rpc_message msg = {
196 .rpc_proc = &nfs_procedures[NFSPROC_READ],
197 .rpc_argp = &rdata->args,
198 .rpc_resp = &rdata->res,
199 .rpc_cred = rdata->cred,
203 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
204 (long long) rdata->args.offset);
205 nfs_fattr_init(fattr);
206 status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
208 nfs_refresh_inode(inode, fattr);
209 /* Emulate the eof flag, which isn't normally needed in NFSv2
210 * as it is guaranteed to always return the file attributes
212 if (rdata->args.offset + rdata->args.count >= fattr->size)
215 dprintk("NFS reply read: %d\n", status);
219 static int nfs_proc_write(struct nfs_write_data *wdata)
221 int flags = wdata->flags;
222 struct inode * inode = wdata->inode;
223 struct nfs_fattr * fattr = wdata->res.fattr;
224 struct rpc_message msg = {
225 .rpc_proc = &nfs_procedures[NFSPROC_WRITE],
226 .rpc_argp = &wdata->args,
227 .rpc_resp = &wdata->res,
228 .rpc_cred = wdata->cred,
232 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
233 (long long) wdata->args.offset);
234 nfs_fattr_init(fattr);
235 status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
237 nfs_post_op_update_inode(inode, fattr);
238 wdata->res.count = wdata->args.count;
239 wdata->verf.committed = NFS_FILE_SYNC;
241 dprintk("NFS reply write: %d\n", status);
242 return status < 0? status : wdata->res.count;
246 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
247 int flags, struct nameidata *nd)
249 struct nfs_fh fhandle;
250 struct nfs_fattr fattr;
251 struct nfs_createargs arg = {
253 .name = dentry->d_name.name,
254 .len = dentry->d_name.len,
257 struct nfs_diropok res = {
261 struct rpc_message msg = {
262 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
268 nfs_fattr_init(&fattr);
269 dprintk("NFS call create %s\n", dentry->d_name.name);
270 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
272 status = nfs_instantiate(dentry, &fhandle, &fattr);
273 dprintk("NFS reply create: %d\n", status);
278 * In NFSv2, mknod is grafted onto the create call.
281 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
284 struct nfs_fh fhandle;
285 struct nfs_fattr fattr;
286 struct nfs_createargs arg = {
288 .name = dentry->d_name.name,
289 .len = dentry->d_name.len,
292 struct nfs_diropok res = {
296 struct rpc_message msg = {
297 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
303 dprintk("NFS call mknod %s\n", dentry->d_name.name);
305 mode = sattr->ia_mode;
306 if (S_ISFIFO(mode)) {
307 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
308 sattr->ia_valid &= ~ATTR_SIZE;
309 } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
310 sattr->ia_valid |= ATTR_SIZE;
311 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
314 nfs_fattr_init(&fattr);
315 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
316 nfs_mark_for_revalidate(dir);
318 if (status == -EINVAL && S_ISFIFO(mode)) {
319 sattr->ia_mode = mode;
320 nfs_fattr_init(&fattr);
321 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
324 status = nfs_instantiate(dentry, &fhandle, &fattr);
325 dprintk("NFS reply mknod: %d\n", status);
330 nfs_proc_remove(struct inode *dir, struct qstr *name)
332 struct nfs_diropargs arg = {
337 struct rpc_message msg = {
338 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
343 dprintk("NFS call remove %s\n", name->name);
344 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
345 nfs_mark_for_revalidate(dir);
347 dprintk("NFS reply remove: %d\n", status);
352 nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
354 struct nfs_diropargs *arg;
356 arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL);
359 arg->fh = NFS_FH(dir->d_inode);
360 arg->name = name->name;
361 arg->len = name->len;
362 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
368 nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
370 struct rpc_message *msg = &task->tk_msg;
373 nfs_mark_for_revalidate(dir->d_inode);
374 kfree(msg->rpc_argp);
380 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
381 struct inode *new_dir, struct qstr *new_name)
383 struct nfs_renameargs arg = {
384 .fromfh = NFS_FH(old_dir),
385 .fromname = old_name->name,
386 .fromlen = old_name->len,
387 .tofh = NFS_FH(new_dir),
388 .toname = new_name->name,
389 .tolen = new_name->len
391 struct rpc_message msg = {
392 .rpc_proc = &nfs_procedures[NFSPROC_RENAME],
397 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
398 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
399 nfs_mark_for_revalidate(old_dir);
400 nfs_mark_for_revalidate(new_dir);
401 dprintk("NFS reply rename: %d\n", status);
406 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
408 struct nfs_linkargs arg = {
409 .fromfh = NFS_FH(inode),
411 .toname = name->name,
414 struct rpc_message msg = {
415 .rpc_proc = &nfs_procedures[NFSPROC_LINK],
420 dprintk("NFS call link %s\n", name->name);
421 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
422 nfs_mark_for_revalidate(inode);
423 nfs_mark_for_revalidate(dir);
424 dprintk("NFS reply link: %d\n", status);
429 nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
430 struct iattr *sattr, struct nfs_fh *fhandle,
431 struct nfs_fattr *fattr)
433 struct nfs_symlinkargs arg = {
434 .fromfh = NFS_FH(dir),
435 .fromname = name->name,
436 .fromlen = name->len,
437 .topath = path->name,
441 struct rpc_message msg = {
442 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
447 if (path->len > NFS2_MAXPATHLEN)
448 return -ENAMETOOLONG;
449 dprintk("NFS call symlink %s -> %s\n", name->name, path->name);
450 nfs_fattr_init(fattr);
452 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
453 nfs_mark_for_revalidate(dir);
454 dprintk("NFS reply symlink: %d\n", status);
459 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
461 struct nfs_fh fhandle;
462 struct nfs_fattr fattr;
463 struct nfs_createargs arg = {
465 .name = dentry->d_name.name,
466 .len = dentry->d_name.len,
469 struct nfs_diropok res = {
473 struct rpc_message msg = {
474 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
480 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
481 nfs_fattr_init(&fattr);
482 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
483 nfs_mark_for_revalidate(dir);
485 status = nfs_instantiate(dentry, &fhandle, &fattr);
486 dprintk("NFS reply mkdir: %d\n", status);
491 nfs_proc_rmdir(struct inode *dir, struct qstr *name)
493 struct nfs_diropargs arg = {
498 struct rpc_message msg = {
499 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
504 dprintk("NFS call rmdir %s\n", name->name);
505 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
506 nfs_mark_for_revalidate(dir);
507 dprintk("NFS reply rmdir: %d\n", status);
512 * The READDIR implementation is somewhat hackish - we pass a temporary
513 * buffer to the encode function, which installs it in the receive
514 * the receive iovec. The decode function just parses the reply to make
515 * sure it is syntactically correct; the entries itself are decoded
516 * from nfs_readdir by calling the decode_entry function directly.
519 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
520 u64 cookie, struct page *page, unsigned int count, int plus)
522 struct inode *dir = dentry->d_inode;
523 struct nfs_readdirargs arg = {
529 struct rpc_message msg = {
530 .rpc_proc = &nfs_procedures[NFSPROC_READDIR],
538 dprintk("NFS call readdir %d\n", (unsigned int)cookie);
539 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
541 dprintk("NFS reply readdir: %d\n", status);
547 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
548 struct nfs_fsstat *stat)
550 struct nfs2_fsstat fsinfo;
551 struct rpc_message msg = {
552 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
558 dprintk("NFS call statfs\n");
559 nfs_fattr_init(stat->fattr);
560 status = rpc_call_sync(server->client, &msg, 0);
561 dprintk("NFS reply statfs: %d\n", status);
564 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
565 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
566 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
575 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
576 struct nfs_fsinfo *info)
578 struct nfs2_fsstat fsinfo;
579 struct rpc_message msg = {
580 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
586 dprintk("NFS call fsinfo\n");
587 nfs_fattr_init(info->fattr);
588 status = rpc_call_sync(server->client, &msg, 0);
589 dprintk("NFS reply fsinfo: %d\n", status);
592 info->rtmax = NFS_MAXDATA;
593 info->rtpref = fsinfo.tsize;
594 info->rtmult = fsinfo.bsize;
595 info->wtmax = NFS_MAXDATA;
596 info->wtpref = fsinfo.tsize;
597 info->wtmult = fsinfo.bsize;
598 info->dtpref = fsinfo.tsize;
599 info->maxfilesize = 0x7FFFFFFF;
600 info->lease_time = 0;
606 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
607 struct nfs_pathconf *info)
610 info->max_namelen = NFS2_MAXNAMLEN;
614 extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
616 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
618 if (task->tk_status >= 0) {
619 nfs_refresh_inode(data->inode, data->res.fattr);
620 /* Emulate the eof flag, which isn't normally needed in NFSv2
621 * as it is guaranteed to always return the file attributes
623 if (data->args.offset + data->args.count >= data->res.fattr->size)
629 static void nfs_proc_read_setup(struct nfs_read_data *data)
631 struct rpc_message msg = {
632 .rpc_proc = &nfs_procedures[NFSPROC_READ],
633 .rpc_argp = &data->args,
634 .rpc_resp = &data->res,
635 .rpc_cred = data->cred,
638 rpc_call_setup(&data->task, &msg, 0);
641 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
643 if (task->tk_status >= 0)
644 nfs_post_op_update_inode(data->inode, data->res.fattr);
648 static void nfs_proc_write_setup(struct nfs_write_data *data, int how)
650 struct rpc_message msg = {
651 .rpc_proc = &nfs_procedures[NFSPROC_WRITE],
652 .rpc_argp = &data->args,
653 .rpc_resp = &data->res,
654 .rpc_cred = data->cred,
657 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
658 data->args.stable = NFS_FILE_SYNC;
660 /* Finalize the task. */
661 rpc_call_setup(&data->task, &msg, 0);
665 nfs_proc_commit_setup(struct nfs_write_data *data, int how)
671 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
673 return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
677 struct nfs_rpc_ops nfs_v2_clientops = {
678 .version = 2, /* protocol version */
679 .dentry_ops = &nfs_dentry_operations,
680 .dir_inode_ops = &nfs_dir_inode_operations,
681 .file_inode_ops = &nfs_file_inode_operations,
682 .getroot = nfs_proc_get_root,
683 .getattr = nfs_proc_getattr,
684 .setattr = nfs_proc_setattr,
685 .lookup = nfs_proc_lookup,
686 .access = NULL, /* access */
687 .readlink = nfs_proc_readlink,
688 .read = nfs_proc_read,
689 .write = nfs_proc_write,
690 .commit = NULL, /* commit */
691 .create = nfs_proc_create,
692 .remove = nfs_proc_remove,
693 .unlink_setup = nfs_proc_unlink_setup,
694 .unlink_done = nfs_proc_unlink_done,
695 .rename = nfs_proc_rename,
696 .link = nfs_proc_link,
697 .symlink = nfs_proc_symlink,
698 .mkdir = nfs_proc_mkdir,
699 .rmdir = nfs_proc_rmdir,
700 .readdir = nfs_proc_readdir,
701 .mknod = nfs_proc_mknod,
702 .statfs = nfs_proc_statfs,
703 .fsinfo = nfs_proc_fsinfo,
704 .pathconf = nfs_proc_pathconf,
705 .decode_dirent = nfs_decode_dirent,
706 .read_setup = nfs_proc_read_setup,
707 .read_done = nfs_read_done,
708 .write_setup = nfs_proc_write_setup,
709 .write_done = nfs_write_done,
710 .commit_setup = nfs_proc_commit_setup,
711 .file_open = nfs_open,
712 .file_release = nfs_release,
713 .lock = nfs_proc_lock,