2 * linux/fs/nfs/nfs3proc.c
4 * Client-side NFSv3 procedures stubs.
6 * Copyright (C) 1997, Olaf Kirch
10 #include <linux/utsname.h>
11 #include <linux/errno.h>
12 #include <linux/string.h>
13 #include <linux/sunrpc/clnt.h>
14 #include <linux/nfs.h>
15 #include <linux/nfs3.h>
16 #include <linux/nfs_fs.h>
17 #include <linux/nfs_page.h>
18 #include <linux/lockd/bind.h>
19 #include <linux/nfs_mount.h>
24 #define NFSDBG_FACILITY NFSDBG_PROC
26 /* A wrapper to handle the EJUKEBOX error message */
28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
32 res = rpc_call_sync(clnt, msg, flags);
35 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
37 } while (!fatal_signal_pending(current));
41 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
44 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
46 if (task->tk_status != -EJUKEBOX)
48 nfs_inc_stats(inode, NFSIOS_DELAY);
50 rpc_restart_call(task);
51 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
56 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
57 struct nfs_fsinfo *info)
59 struct rpc_message msg = {
60 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
66 dprintk("%s: call fsinfo\n", __func__);
67 nfs_fattr_init(info->fattr);
68 status = rpc_call_sync(client, &msg, 0);
69 dprintk("%s: reply fsinfo: %d\n", __func__, status);
70 if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
71 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
72 msg.rpc_resp = info->fattr;
73 status = rpc_call_sync(client, &msg, 0);
74 dprintk("%s: reply getattr: %d\n", __func__, status);
80 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
83 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
84 struct nfs_fsinfo *info)
88 status = do_proc_get_root(server->client, fhandle, info);
89 if (status && server->nfs_client->cl_rpcclient != server->client)
90 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
95 * One function for each procedure in the NFS protocol.
98 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
99 struct nfs_fattr *fattr)
101 struct rpc_message msg = {
102 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
108 dprintk("NFS call getattr\n");
109 nfs_fattr_init(fattr);
110 status = rpc_call_sync(server->client, &msg, 0);
111 dprintk("NFS reply getattr: %d\n", status);
116 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
119 struct inode *inode = dentry->d_inode;
120 struct nfs3_sattrargs arg = {
124 struct rpc_message msg = {
125 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
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 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
142 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
144 struct nfs_fattr dir_attr;
145 struct nfs3_diropargs arg = {
150 struct nfs3_diropres res = {
151 .dir_attr = &dir_attr,
155 struct rpc_message msg = {
156 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
162 dprintk("NFS call lookup %s\n", name->name);
163 nfs_fattr_init(&dir_attr);
164 nfs_fattr_init(fattr);
165 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
166 nfs_refresh_inode(dir, &dir_attr);
167 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
168 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
169 msg.rpc_argp = fhandle;
170 msg.rpc_resp = fattr;
171 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
173 dprintk("NFS reply lookup: %d\n", status);
177 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
179 struct nfs_fattr fattr;
180 struct nfs3_accessargs arg = {
183 struct nfs3_accessres res = {
186 struct rpc_message msg = {
187 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
190 .rpc_cred = entry->cred,
192 int mode = entry->mask;
195 dprintk("NFS call access\n");
198 arg.access |= NFS3_ACCESS_READ;
199 if (S_ISDIR(inode->i_mode)) {
200 if (mode & MAY_WRITE)
201 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
203 arg.access |= NFS3_ACCESS_LOOKUP;
205 if (mode & MAY_WRITE)
206 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
208 arg.access |= NFS3_ACCESS_EXECUTE;
210 nfs_fattr_init(&fattr);
211 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
212 nfs_refresh_inode(inode, &fattr);
215 if (res.access & NFS3_ACCESS_READ)
216 entry->mask |= MAY_READ;
217 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
218 entry->mask |= MAY_WRITE;
219 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
220 entry->mask |= MAY_EXEC;
222 dprintk("NFS reply access: %d\n", status);
226 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
227 unsigned int pgbase, unsigned int pglen)
229 struct nfs_fattr fattr;
230 struct nfs3_readlinkargs args = {
236 struct rpc_message msg = {
237 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
243 dprintk("NFS call readlink\n");
244 nfs_fattr_init(&fattr);
245 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
246 nfs_refresh_inode(inode, &fattr);
247 dprintk("NFS reply readlink: %d\n", status);
251 struct nfs3_createdata {
252 struct rpc_message msg;
254 struct nfs3_createargs create;
255 struct nfs3_mkdirargs mkdir;
256 struct nfs3_symlinkargs symlink;
257 struct nfs3_mknodargs mknod;
259 struct nfs3_diropres res;
261 struct nfs_fattr fattr;
262 struct nfs_fattr dir_attr;
265 static struct nfs3_createdata *nfs3_alloc_createdata(void)
267 struct nfs3_createdata *data;
269 data = kzalloc(sizeof(*data), GFP_KERNEL);
271 data->msg.rpc_argp = &data->arg;
272 data->msg.rpc_resp = &data->res;
273 data->res.fh = &data->fh;
274 data->res.fattr = &data->fattr;
275 data->res.dir_attr = &data->dir_attr;
276 nfs_fattr_init(data->res.fattr);
277 nfs_fattr_init(data->res.dir_attr);
282 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
286 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
287 nfs_post_op_update_inode(dir, data->res.dir_attr);
289 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
293 static void nfs3_free_createdata(struct nfs3_createdata *data)
299 * Create a regular file.
300 * For now, we don't implement O_EXCL.
303 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
304 int flags, struct nameidata *nd)
306 struct nfs3_createdata *data;
307 mode_t mode = sattr->ia_mode;
308 int status = -ENOMEM;
310 dprintk("NFS call create %s\n", dentry->d_name.name);
312 data = nfs3_alloc_createdata();
316 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
317 data->arg.create.fh = NFS_FH(dir);
318 data->arg.create.name = dentry->d_name.name;
319 data->arg.create.len = dentry->d_name.len;
320 data->arg.create.sattr = sattr;
322 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
323 if (flags & O_EXCL) {
324 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
325 data->arg.create.verifier[0] = jiffies;
326 data->arg.create.verifier[1] = current->pid;
329 sattr->ia_mode &= ~current->fs->umask;
332 status = nfs3_do_create(dir, dentry, data);
334 if (status != -ENOTSUPP)
336 /* If the server doesn't support the exclusive creation
337 * semantics, try again with simple 'guarded' mode. */
338 switch (data->arg.create.createmode) {
339 case NFS3_CREATE_EXCLUSIVE:
340 data->arg.create.createmode = NFS3_CREATE_GUARDED;
343 case NFS3_CREATE_GUARDED:
344 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
347 case NFS3_CREATE_UNCHECKED:
350 nfs_fattr_init(data->res.dir_attr);
351 nfs_fattr_init(data->res.fattr);
357 /* When we created the file with exclusive semantics, make
358 * sure we set the attributes afterwards. */
359 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
360 dprintk("NFS call setattr (post-create)\n");
362 if (!(sattr->ia_valid & ATTR_ATIME_SET))
363 sattr->ia_valid |= ATTR_ATIME;
364 if (!(sattr->ia_valid & ATTR_MTIME_SET))
365 sattr->ia_valid |= ATTR_MTIME;
367 /* Note: we could use a guarded setattr here, but I'm
368 * not sure this buys us anything (and I'd have
369 * to revamp the NFSv3 XDR code) */
370 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
371 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
372 dprintk("NFS reply setattr (post-create): %d\n", status);
376 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
378 nfs3_free_createdata(data);
379 dprintk("NFS reply create: %d\n", status);
384 nfs3_proc_remove(struct inode *dir, struct qstr *name)
386 struct nfs_removeargs arg = {
388 .name.len = name->len,
389 .name.name = name->name,
391 struct nfs_removeres res;
392 struct rpc_message msg = {
393 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
399 dprintk("NFS call remove %s\n", name->name);
400 nfs_fattr_init(&res.dir_attr);
401 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
402 nfs_post_op_update_inode(dir, &res.dir_attr);
403 dprintk("NFS reply remove: %d\n", status);
408 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
410 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
414 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
416 struct nfs_removeres *res;
417 if (nfs3_async_handle_jukebox(task, dir))
419 res = task->tk_msg.rpc_resp;
420 nfs_post_op_update_inode(dir, &res->dir_attr);
425 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
426 struct inode *new_dir, struct qstr *new_name)
428 struct nfs_fattr old_dir_attr, new_dir_attr;
429 struct nfs3_renameargs arg = {
430 .fromfh = NFS_FH(old_dir),
431 .fromname = old_name->name,
432 .fromlen = old_name->len,
433 .tofh = NFS_FH(new_dir),
434 .toname = new_name->name,
435 .tolen = new_name->len
437 struct nfs3_renameres res = {
438 .fromattr = &old_dir_attr,
439 .toattr = &new_dir_attr
441 struct rpc_message msg = {
442 .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME],
448 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
449 nfs_fattr_init(&old_dir_attr);
450 nfs_fattr_init(&new_dir_attr);
451 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
452 nfs_post_op_update_inode(old_dir, &old_dir_attr);
453 nfs_post_op_update_inode(new_dir, &new_dir_attr);
454 dprintk("NFS reply rename: %d\n", status);
459 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
461 struct nfs_fattr dir_attr, fattr;
462 struct nfs3_linkargs arg = {
463 .fromfh = NFS_FH(inode),
465 .toname = name->name,
468 struct nfs3_linkres res = {
469 .dir_attr = &dir_attr,
472 struct rpc_message msg = {
473 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
479 dprintk("NFS call link %s\n", name->name);
480 nfs_fattr_init(&dir_attr);
481 nfs_fattr_init(&fattr);
482 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
483 nfs_post_op_update_inode(dir, &dir_attr);
484 nfs_post_op_update_inode(inode, &fattr);
485 dprintk("NFS reply link: %d\n", status);
490 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
491 unsigned int len, struct iattr *sattr)
493 struct nfs3_createdata *data;
494 int status = -ENOMEM;
496 if (len > NFS3_MAXPATHLEN)
497 return -ENAMETOOLONG;
499 dprintk("NFS call symlink %s\n", dentry->d_name.name);
501 data = nfs3_alloc_createdata();
504 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
505 data->arg.symlink.fromfh = NFS_FH(dir);
506 data->arg.symlink.fromname = dentry->d_name.name;
507 data->arg.symlink.fromlen = dentry->d_name.len;
508 data->arg.symlink.pages = &page;
509 data->arg.symlink.pathlen = len;
510 data->arg.symlink.sattr = sattr;
512 status = nfs3_do_create(dir, dentry, data);
514 nfs3_free_createdata(data);
516 dprintk("NFS reply symlink: %d\n", status);
521 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
523 struct nfs3_createdata *data;
524 int mode = sattr->ia_mode;
525 int status = -ENOMEM;
527 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
529 sattr->ia_mode &= ~current->fs->umask;
531 data = nfs3_alloc_createdata();
535 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
536 data->arg.mkdir.fh = NFS_FH(dir);
537 data->arg.mkdir.name = dentry->d_name.name;
538 data->arg.mkdir.len = dentry->d_name.len;
539 data->arg.mkdir.sattr = sattr;
541 status = nfs3_do_create(dir, dentry, data);
545 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
547 nfs3_free_createdata(data);
548 dprintk("NFS reply mkdir: %d\n", status);
553 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
555 struct nfs_fattr dir_attr;
556 struct nfs3_diropargs arg = {
561 struct rpc_message msg = {
562 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
564 .rpc_resp = &dir_attr,
568 dprintk("NFS call rmdir %s\n", name->name);
569 nfs_fattr_init(&dir_attr);
570 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
571 nfs_post_op_update_inode(dir, &dir_attr);
572 dprintk("NFS reply rmdir: %d\n", status);
577 * The READDIR implementation is somewhat hackish - we pass the user buffer
578 * to the encode function, which installs it in the receive iovec.
579 * The decode function itself doesn't perform any decoding, it just makes
580 * sure the reply is syntactically correct.
582 * Also note that this implementation handles both plain readdir and
586 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
587 u64 cookie, struct page *page, unsigned int count, int plus)
589 struct inode *dir = dentry->d_inode;
590 struct nfs_fattr dir_attr;
591 __be32 *verf = NFS_COOKIEVERF(dir);
592 struct nfs3_readdirargs arg = {
595 .verf = {verf[0], verf[1]},
600 struct nfs3_readdirres res = {
601 .dir_attr = &dir_attr,
605 struct rpc_message msg = {
606 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
614 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
616 dprintk("NFS call readdir%s %d\n",
617 plus? "plus" : "", (unsigned int) cookie);
619 nfs_fattr_init(&dir_attr);
620 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
622 nfs_invalidate_atime(dir);
624 nfs_refresh_inode(dir, &dir_attr);
625 dprintk("NFS reply readdir: %d\n", status);
630 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
633 struct nfs3_createdata *data;
634 mode_t mode = sattr->ia_mode;
635 int status = -ENOMEM;
637 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
638 MAJOR(rdev), MINOR(rdev));
640 sattr->ia_mode &= ~current->fs->umask;
642 data = nfs3_alloc_createdata();
646 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
647 data->arg.mknod.fh = NFS_FH(dir);
648 data->arg.mknod.name = dentry->d_name.name;
649 data->arg.mknod.len = dentry->d_name.len;
650 data->arg.mknod.sattr = sattr;
651 data->arg.mknod.rdev = rdev;
653 switch (sattr->ia_mode & S_IFMT) {
655 data->arg.mknod.type = NF3BLK;
658 data->arg.mknod.type = NF3CHR;
661 data->arg.mknod.type = NF3FIFO;
664 data->arg.mknod.type = NF3SOCK;
671 status = nfs3_do_create(dir, dentry, data);
674 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
676 nfs3_free_createdata(data);
677 dprintk("NFS reply mknod: %d\n", status);
682 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
683 struct nfs_fsstat *stat)
685 struct rpc_message msg = {
686 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
692 dprintk("NFS call fsstat\n");
693 nfs_fattr_init(stat->fattr);
694 status = rpc_call_sync(server->client, &msg, 0);
695 dprintk("NFS reply statfs: %d\n", status);
700 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
701 struct nfs_fsinfo *info)
703 struct rpc_message msg = {
704 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
710 dprintk("NFS call fsinfo\n");
711 nfs_fattr_init(info->fattr);
712 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
713 dprintk("NFS reply fsinfo: %d\n", status);
718 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
719 struct nfs_pathconf *info)
721 struct rpc_message msg = {
722 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
728 dprintk("NFS call pathconf\n");
729 nfs_fattr_init(info->fattr);
730 status = rpc_call_sync(server->client, &msg, 0);
731 dprintk("NFS reply pathconf: %d\n", status);
735 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
737 if (nfs3_async_handle_jukebox(task, data->inode))
740 nfs_invalidate_atime(data->inode);
741 nfs_refresh_inode(data->inode, &data->fattr);
745 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
747 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
750 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
752 if (nfs3_async_handle_jukebox(task, data->inode))
754 if (task->tk_status >= 0)
755 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
759 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
761 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
764 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
766 if (nfs3_async_handle_jukebox(task, data->inode))
768 nfs_refresh_inode(data->inode, data->res.fattr);
772 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
774 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
778 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
780 struct inode *inode = filp->f_path.dentry->d_inode;
782 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
785 const struct nfs_rpc_ops nfs_v3_clientops = {
786 .version = 3, /* protocol version */
787 .dentry_ops = &nfs_dentry_operations,
788 .dir_inode_ops = &nfs3_dir_inode_operations,
789 .file_inode_ops = &nfs3_file_inode_operations,
790 .getroot = nfs3_proc_get_root,
791 .getattr = nfs3_proc_getattr,
792 .setattr = nfs3_proc_setattr,
793 .lookup = nfs3_proc_lookup,
794 .access = nfs3_proc_access,
795 .readlink = nfs3_proc_readlink,
796 .create = nfs3_proc_create,
797 .remove = nfs3_proc_remove,
798 .unlink_setup = nfs3_proc_unlink_setup,
799 .unlink_done = nfs3_proc_unlink_done,
800 .rename = nfs3_proc_rename,
801 .link = nfs3_proc_link,
802 .symlink = nfs3_proc_symlink,
803 .mkdir = nfs3_proc_mkdir,
804 .rmdir = nfs3_proc_rmdir,
805 .readdir = nfs3_proc_readdir,
806 .mknod = nfs3_proc_mknod,
807 .statfs = nfs3_proc_statfs,
808 .fsinfo = nfs3_proc_fsinfo,
809 .pathconf = nfs3_proc_pathconf,
810 .decode_dirent = nfs3_decode_dirent,
811 .read_setup = nfs3_proc_read_setup,
812 .read_done = nfs3_read_done,
813 .write_setup = nfs3_proc_write_setup,
814 .write_done = nfs3_write_done,
815 .commit_setup = nfs3_proc_commit_setup,
816 .commit_done = nfs3_commit_done,
817 .file_open = nfs_open,
818 .file_release = nfs_release,
819 .lock = nfs3_proc_lock,
820 .clear_acl_cache = nfs3_forget_cached_acls,