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);
215 status = nfs_instantiate(dentry, &fhandle, &fattr);
216 dprintk("NFS reply create: %d\n", status);
221 * In NFSv2, mknod is grafted onto the create call.
224 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
227 struct nfs_fh fhandle;
228 struct nfs_fattr fattr;
229 struct nfs_createargs arg = {
231 .name = dentry->d_name.name,
232 .len = dentry->d_name.len,
235 struct nfs_diropok res = {
239 struct rpc_message msg = {
240 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
246 dprintk("NFS call mknod %s\n", dentry->d_name.name);
248 mode = sattr->ia_mode;
249 if (S_ISFIFO(mode)) {
250 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
251 sattr->ia_valid &= ~ATTR_SIZE;
252 } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
253 sattr->ia_valid |= ATTR_SIZE;
254 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
257 nfs_fattr_init(&fattr);
258 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
259 nfs_mark_for_revalidate(dir);
261 if (status == -EINVAL && S_ISFIFO(mode)) {
262 sattr->ia_mode = mode;
263 nfs_fattr_init(&fattr);
264 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
267 status = nfs_instantiate(dentry, &fhandle, &fattr);
268 dprintk("NFS reply mknod: %d\n", status);
273 nfs_proc_remove(struct inode *dir, struct qstr *name)
275 struct nfs_diropargs arg = {
280 struct rpc_message msg = {
281 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
286 dprintk("NFS call remove %s\n", name->name);
287 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
288 nfs_mark_for_revalidate(dir);
290 dprintk("NFS reply remove: %d\n", status);
295 nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
297 struct nfs_diropargs *arg;
299 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
302 arg->fh = NFS_FH(dir->d_inode);
303 arg->name = name->name;
304 arg->len = name->len;
305 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
311 nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
313 struct rpc_message *msg = &task->tk_msg;
316 nfs_mark_for_revalidate(dir->d_inode);
317 kfree(msg->rpc_argp);
323 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
324 struct inode *new_dir, struct qstr *new_name)
326 struct nfs_renameargs arg = {
327 .fromfh = NFS_FH(old_dir),
328 .fromname = old_name->name,
329 .fromlen = old_name->len,
330 .tofh = NFS_FH(new_dir),
331 .toname = new_name->name,
332 .tolen = new_name->len
334 struct rpc_message msg = {
335 .rpc_proc = &nfs_procedures[NFSPROC_RENAME],
340 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
341 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
342 nfs_mark_for_revalidate(old_dir);
343 nfs_mark_for_revalidate(new_dir);
344 dprintk("NFS reply rename: %d\n", status);
349 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
351 struct nfs_linkargs arg = {
352 .fromfh = NFS_FH(inode),
354 .toname = name->name,
357 struct rpc_message msg = {
358 .rpc_proc = &nfs_procedures[NFSPROC_LINK],
363 dprintk("NFS call link %s\n", name->name);
364 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
365 nfs_mark_for_revalidate(inode);
366 nfs_mark_for_revalidate(dir);
367 dprintk("NFS reply link: %d\n", status);
372 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
373 unsigned int len, struct iattr *sattr)
375 struct nfs_fh fhandle;
376 struct nfs_fattr fattr;
377 struct nfs_symlinkargs arg = {
378 .fromfh = NFS_FH(dir),
379 .fromname = dentry->d_name.name,
380 .fromlen = dentry->d_name.len,
385 struct rpc_message msg = {
386 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
391 if (len > NFS2_MAXPATHLEN)
392 return -ENAMETOOLONG;
394 dprintk("NFS call symlink %s\n", dentry->d_name.name);
396 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
397 nfs_mark_for_revalidate(dir);
400 * V2 SYMLINK requests don't return any attributes. Setting the
401 * filehandle size to zero indicates to nfs_instantiate that it
402 * should fill in the data with a LOOKUP call on the wire.
405 nfs_fattr_init(&fattr);
407 status = nfs_instantiate(dentry, &fhandle, &fattr);
410 dprintk("NFS reply symlink: %d\n", status);
415 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
417 struct nfs_fh fhandle;
418 struct nfs_fattr fattr;
419 struct nfs_createargs arg = {
421 .name = dentry->d_name.name,
422 .len = dentry->d_name.len,
425 struct nfs_diropok res = {
429 struct rpc_message msg = {
430 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
436 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
437 nfs_fattr_init(&fattr);
438 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
439 nfs_mark_for_revalidate(dir);
441 status = nfs_instantiate(dentry, &fhandle, &fattr);
442 dprintk("NFS reply mkdir: %d\n", status);
447 nfs_proc_rmdir(struct inode *dir, struct qstr *name)
449 struct nfs_diropargs arg = {
454 struct rpc_message msg = {
455 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
460 dprintk("NFS call rmdir %s\n", name->name);
461 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
462 nfs_mark_for_revalidate(dir);
463 dprintk("NFS reply rmdir: %d\n", status);
468 * The READDIR implementation is somewhat hackish - we pass a temporary
469 * buffer to the encode function, which installs it in the receive
470 * the receive iovec. The decode function just parses the reply to make
471 * sure it is syntactically correct; the entries itself are decoded
472 * from nfs_readdir by calling the decode_entry function directly.
475 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
476 u64 cookie, struct page *page, unsigned int count, int plus)
478 struct inode *dir = dentry->d_inode;
479 struct nfs_readdirargs arg = {
485 struct rpc_message msg = {
486 .rpc_proc = &nfs_procedures[NFSPROC_READDIR],
492 dprintk("NFS call readdir %d\n", (unsigned int)cookie);
493 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
495 dprintk("NFS reply readdir: %d\n", status);
500 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
501 struct nfs_fsstat *stat)
503 struct nfs2_fsstat fsinfo;
504 struct rpc_message msg = {
505 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
511 dprintk("NFS call statfs\n");
512 nfs_fattr_init(stat->fattr);
513 status = rpc_call_sync(server->client, &msg, 0);
514 dprintk("NFS reply statfs: %d\n", status);
517 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
518 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
519 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
528 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
529 struct nfs_fsinfo *info)
531 struct nfs2_fsstat fsinfo;
532 struct rpc_message msg = {
533 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
539 dprintk("NFS call fsinfo\n");
540 nfs_fattr_init(info->fattr);
541 status = rpc_call_sync(server->client, &msg, 0);
542 dprintk("NFS reply fsinfo: %d\n", status);
545 info->rtmax = NFS_MAXDATA;
546 info->rtpref = fsinfo.tsize;
547 info->rtmult = fsinfo.bsize;
548 info->wtmax = NFS_MAXDATA;
549 info->wtpref = fsinfo.tsize;
550 info->wtmult = fsinfo.bsize;
551 info->dtpref = fsinfo.tsize;
552 info->maxfilesize = 0x7FFFFFFF;
553 info->lease_time = 0;
559 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
560 struct nfs_pathconf *info)
563 info->max_namelen = NFS2_MAXNAMLEN;
567 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
569 if (task->tk_status >= 0) {
570 nfs_refresh_inode(data->inode, data->res.fattr);
571 /* Emulate the eof flag, which isn't normally needed in NFSv2
572 * as it is guaranteed to always return the file attributes
574 if (data->args.offset + data->args.count >= data->res.fattr->size)
580 static void nfs_proc_read_setup(struct nfs_read_data *data)
582 struct rpc_message msg = {
583 .rpc_proc = &nfs_procedures[NFSPROC_READ],
584 .rpc_argp = &data->args,
585 .rpc_resp = &data->res,
586 .rpc_cred = data->cred,
589 rpc_call_setup(&data->task, &msg, 0);
592 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
594 if (task->tk_status >= 0)
595 nfs_post_op_update_inode(data->inode, data->res.fattr);
599 static void nfs_proc_write_setup(struct nfs_write_data *data, int how)
601 struct rpc_message msg = {
602 .rpc_proc = &nfs_procedures[NFSPROC_WRITE],
603 .rpc_argp = &data->args,
604 .rpc_resp = &data->res,
605 .rpc_cred = data->cred,
608 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
609 data->args.stable = NFS_FILE_SYNC;
611 /* Finalize the task. */
612 rpc_call_setup(&data->task, &msg, 0);
616 nfs_proc_commit_setup(struct nfs_write_data *data, int how)
622 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
624 return nlmclnt_proc(filp->f_path.dentry->d_inode, cmd, fl);
628 const struct nfs_rpc_ops nfs_v2_clientops = {
629 .version = 2, /* protocol version */
630 .dentry_ops = &nfs_dentry_operations,
631 .dir_inode_ops = &nfs_dir_inode_operations,
632 .file_inode_ops = &nfs_file_inode_operations,
633 .getroot = nfs_proc_get_root,
634 .getattr = nfs_proc_getattr,
635 .setattr = nfs_proc_setattr,
636 .lookup = nfs_proc_lookup,
637 .access = NULL, /* access */
638 .readlink = nfs_proc_readlink,
639 .create = nfs_proc_create,
640 .remove = nfs_proc_remove,
641 .unlink_setup = nfs_proc_unlink_setup,
642 .unlink_done = nfs_proc_unlink_done,
643 .rename = nfs_proc_rename,
644 .link = nfs_proc_link,
645 .symlink = nfs_proc_symlink,
646 .mkdir = nfs_proc_mkdir,
647 .rmdir = nfs_proc_rmdir,
648 .readdir = nfs_proc_readdir,
649 .mknod = nfs_proc_mknod,
650 .statfs = nfs_proc_statfs,
651 .fsinfo = nfs_proc_fsinfo,
652 .pathconf = nfs_proc_pathconf,
653 .decode_dirent = nfs_decode_dirent,
654 .read_setup = nfs_proc_read_setup,
655 .read_done = nfs_read_done,
656 .write_setup = nfs_proc_write_setup,
657 .write_done = nfs_write_done,
658 .commit_setup = nfs_proc_commit_setup,
659 .file_open = nfs_open,
660 .file_release = nfs_release,
661 .lock = nfs_proc_lock,