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[PATCH] delete from_swap_cache BUG_ONs
[linux-ginger.git] / fs / nfs / nfs3proc.c
blob2681485cf2d00f9f9fdd647a8bf1cd9861299104
1 /*
2 * linux/fs/nfs/nfs3proc.c
3 *
4 * Client-side NFSv3 procedures stubs.
5 *
6 * Copyright (C) 1997, Olaf Kirch
7 */
8
9 #include <linux/mm.h>
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/smp_lock.h>
20 #include <linux/nfs_mount.h>
21
22 #define NFSDBG_FACILITY NFSDBG_PROC
23
24 extern struct rpc_procinfo nfs3_procedures[];
25
26 /* A wrapper to handle the EJUKEBOX error message */
27 static int
28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
29 {
30 sigset_t oldset;
31 int res;
32 rpc_clnt_sigmask(clnt, &oldset);
33 do {
34 res = rpc_call_sync(clnt, msg, flags);
35 if (res != -EJUKEBOX)
36 break;
37 set_current_state(TASK_INTERRUPTIBLE);
38 schedule_timeout(NFS_JUKEBOX_RETRY_TIME);
39 res = -ERESTARTSYS;
40 } while (!signalled());
41 rpc_clnt_sigunmask(clnt, &oldset);
42 return res;
43 }
44
45 static inline int
46 nfs3_rpc_call_wrapper(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags)
47 {
48 struct rpc_message msg = {
49 .rpc_proc = &clnt->cl_procinfo[proc],
50 .rpc_argp = argp,
51 .rpc_resp = resp,
52 };
53 return nfs3_rpc_wrapper(clnt, &msg, flags);
54 }
55
56 #define rpc_call(clnt, proc, argp, resp, flags) \
57 nfs3_rpc_call_wrapper(clnt, proc, argp, resp, flags)
58 #define rpc_call_sync(clnt, msg, flags) \
59 nfs3_rpc_wrapper(clnt, msg, flags)
60
61 static int
62 nfs3_async_handle_jukebox(struct rpc_task *task)
63 {
64 if (task->tk_status != -EJUKEBOX)
65 return 0;
66 task->tk_status = 0;
67 rpc_restart_call(task);
68 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
69 return 1;
70 }
71
72 /*
73 * Bare-bones access to getattr: this is for nfs_read_super.
74 */
75 static int
76 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
77 struct nfs_fsinfo *info)
78 {
79 int status;
80
81 dprintk("%s: call fsinfo\n", __FUNCTION__);
82 info->fattr->valid = 0;
83 status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0);
84 dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status);
85 if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
86 status = rpc_call(server->client_sys, NFS3PROC_GETATTR, fhandle, info->fattr, 0);
87 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
88 }
89 return status;
90 }
91
92 /*
93 * One function for each procedure in the NFS protocol.
94 */
95 static int
96 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
97 struct nfs_fattr *fattr)
98 {
99 int status;
100
101 dprintk("NFS call getattr\n");
102 fattr->valid = 0;
103 status = rpc_call(server->client, NFS3PROC_GETATTR,
104 fhandle, fattr, 0);
105 dprintk("NFS reply getattr: %d\n", status);
106 return status;
107 }
108
109 static int
110 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
111 struct iattr *sattr)
112 {
113 struct inode *inode = dentry->d_inode;
114 struct nfs3_sattrargs arg = {
115 .fh = NFS_FH(inode),
116 .sattr = sattr,
117 };
118 int status;
119
120 dprintk("NFS call setattr\n");
121 fattr->valid = 0;
122 status = rpc_call(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, 0);
123 if (status == 0)
124 nfs_setattr_update_inode(inode, sattr);
125 dprintk("NFS reply setattr: %d\n", status);
126 return status;
127 }
128
129 static int
130 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
131 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
132 {
133 struct nfs_fattr dir_attr;
134 struct nfs3_diropargs arg = {
135 .fh = NFS_FH(dir),
136 .name = name->name,
137 .len = name->len
138 };
139 struct nfs3_diropres res = {
140 .dir_attr = &dir_attr,
141 .fh = fhandle,
142 .fattr = fattr
143 };
144 int status;
145
146 dprintk("NFS call lookup %s\n", name->name);
147 dir_attr.valid = 0;
148 fattr->valid = 0;
149 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, 0);
150 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR))
151 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_GETATTR,
152 fhandle, fattr, 0);
153 dprintk("NFS reply lookup: %d\n", status);
154 if (status >= 0)
155 status = nfs_refresh_inode(dir, &dir_attr);
156 return status;
157 }
158
159 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
160 {
161 struct nfs_fattr fattr;
162 struct nfs3_accessargs arg = {
163 .fh = NFS_FH(inode),
164 };
165 struct nfs3_accessres res = {
166 .fattr = &fattr,
167 };
168 struct rpc_message msg = {
169 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
170 .rpc_argp = &arg,
171 .rpc_resp = &res,
172 .rpc_cred = entry->cred
173 };
174 int mode = entry->mask;
175 int status;
176
177 dprintk("NFS call access\n");
178 fattr.valid = 0;
179
180 if (mode & MAY_READ)
181 arg.access |= NFS3_ACCESS_READ;
182 if (S_ISDIR(inode->i_mode)) {
183 if (mode & MAY_WRITE)
184 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
185 if (mode & MAY_EXEC)
186 arg.access |= NFS3_ACCESS_LOOKUP;
187 } else {
188 if (mode & MAY_WRITE)
189 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
190 if (mode & MAY_EXEC)
191 arg.access |= NFS3_ACCESS_EXECUTE;
192 }
193 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
194 nfs_refresh_inode(inode, &fattr);
195 if (status == 0) {
196 entry->mask = 0;
197 if (res.access & NFS3_ACCESS_READ)
198 entry->mask |= MAY_READ;
199 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
200 entry->mask |= MAY_WRITE;
201 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
202 entry->mask |= MAY_EXEC;
203 }
204 dprintk("NFS reply access: %d\n", status);
205 return status;
206 }
207
208 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
209 unsigned int pgbase, unsigned int pglen)
210 {
211 struct nfs_fattr fattr;
212 struct nfs3_readlinkargs args = {
213 .fh = NFS_FH(inode),
214 .pgbase = pgbase,
215 .pglen = pglen,
216 .pages = &page
217 };
218 int status;
219
220 dprintk("NFS call readlink\n");
221 fattr.valid = 0;
222 status = rpc_call(NFS_CLIENT(inode), NFS3PROC_READLINK,
223 &args, &fattr, 0);
224 nfs_refresh_inode(inode, &fattr);
225 dprintk("NFS reply readlink: %d\n", status);
226 return status;
227 }
228
229 static int nfs3_proc_read(struct nfs_read_data *rdata)
230 {
231 int flags = rdata->flags;
232 struct inode * inode = rdata->inode;
233 struct nfs_fattr * fattr = rdata->res.fattr;
234 struct rpc_message msg = {
235 .rpc_proc = &nfs3_procedures[NFS3PROC_READ],
236 .rpc_argp = &rdata->args,
237 .rpc_resp = &rdata->res,
238 .rpc_cred = rdata->cred,
239 };
240 int status;
241
242 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
243 (long long) rdata->args.offset);
244 fattr->valid = 0;
245 status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
246 if (status >= 0)
247 nfs_refresh_inode(inode, fattr);
248 dprintk("NFS reply read: %d\n", status);
249 return status;
250 }
251
252 static int nfs3_proc_write(struct nfs_write_data *wdata)
253 {
254 int rpcflags = wdata->flags;
255 struct inode * inode = wdata->inode;
256 struct nfs_fattr * fattr = wdata->res.fattr;
257 struct rpc_message msg = {
258 .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE],
259 .rpc_argp = &wdata->args,
260 .rpc_resp = &wdata->res,
261 .rpc_cred = wdata->cred,
262 };
263 int status;
264
265 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
266 (long long) wdata->args.offset);
267 fattr->valid = 0;
268 status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags);
269 if (status >= 0)
270 nfs_refresh_inode(inode, fattr);
271 dprintk("NFS reply write: %d\n", status);
272 return status < 0? status : wdata->res.count;
273 }
274
275 static int nfs3_proc_commit(struct nfs_write_data *cdata)
276 {
277 struct inode * inode = cdata->inode;
278 struct nfs_fattr * fattr = cdata->res.fattr;
279 struct rpc_message msg = {
280 .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT],
281 .rpc_argp = &cdata->args,
282 .rpc_resp = &cdata->res,
283 .rpc_cred = cdata->cred,
284 };
285 int status;
286
287 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
288 (long long) cdata->args.offset);
289 fattr->valid = 0;
290 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
291 if (status >= 0)
292 nfs_refresh_inode(inode, fattr);
293 dprintk("NFS reply commit: %d\n", status);
294 return status;
295 }
296
297 /*
298 * Create a regular file.
299 * For now, we don't implement O_EXCL.
300 */
301 static int
302 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
303 int flags)
304 {
305 struct nfs_fh fhandle;
306 struct nfs_fattr fattr;
307 struct nfs_fattr dir_attr;
308 struct nfs3_createargs arg = {
309 .fh = NFS_FH(dir),
310 .name = dentry->d_name.name,
311 .len = dentry->d_name.len,
312 .sattr = sattr,
313 };
314 struct nfs3_diropres res = {
315 .dir_attr = &dir_attr,
316 .fh = &fhandle,
317 .fattr = &fattr
318 };
319 mode_t mode = sattr->ia_mode;
320 int status;
321
322 dprintk("NFS call create %s\n", dentry->d_name.name);
323 arg.createmode = NFS3_CREATE_UNCHECKED;
324 if (flags & O_EXCL) {
325 arg.createmode = NFS3_CREATE_EXCLUSIVE;
326 arg.verifier[0] = jiffies;
327 arg.verifier[1] = current->pid;
328 }
329
330 sattr->ia_mode &= ~current->fs->umask;
331
332 again:
333 dir_attr.valid = 0;
334 fattr.valid = 0;
335 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0);
336 nfs_refresh_inode(dir, &dir_attr);
337
338 /* If the server doesn't support the exclusive creation semantics,
339 * try again with simple 'guarded' mode. */
340 if (status == NFSERR_NOTSUPP) {
341 switch (arg.createmode) {
342 case NFS3_CREATE_EXCLUSIVE:
343 arg.createmode = NFS3_CREATE_GUARDED;
344 break;
345
346 case NFS3_CREATE_GUARDED:
347 arg.createmode = NFS3_CREATE_UNCHECKED;
348 break;
349
350 case NFS3_CREATE_UNCHECKED:
351 goto out;
352 }
353 goto again;
354 }
355
356 if (status == 0)
357 status = nfs_instantiate(dentry, &fhandle, &fattr);
358 if (status != 0)
359 goto out;
360
361 /* When we created the file with exclusive semantics, make
362 * sure we set the attributes afterwards. */
363 if (arg.createmode == NFS3_CREATE_EXCLUSIVE) {
364 dprintk("NFS call setattr (post-create)\n");
365
366 if (!(sattr->ia_valid & ATTR_ATIME_SET))
367 sattr->ia_valid |= ATTR_ATIME;
368 if (!(sattr->ia_valid & ATTR_MTIME_SET))
369 sattr->ia_valid |= ATTR_MTIME;
370
371 /* Note: we could use a guarded setattr here, but I'm
372 * not sure this buys us anything (and I'd have
373 * to revamp the NFSv3 XDR code) */
374 status = nfs3_proc_setattr(dentry, &fattr, sattr);
375 if (status == 0)
376 nfs_setattr_update_inode(dentry->d_inode, sattr);
377 nfs_refresh_inode(dentry->d_inode, &fattr);
378 dprintk("NFS reply setattr (post-create): %d\n", status);
379 }
380 if (status != 0)
381 goto out;
382 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
383 out:
384 dprintk("NFS reply create: %d\n", status);
385 return status;
386 }
387
388 static int
389 nfs3_proc_remove(struct inode *dir, struct qstr *name)
390 {
391 struct nfs_fattr dir_attr;
392 struct nfs3_diropargs arg = {
393 .fh = NFS_FH(dir),
394 .name = name->name,
395 .len = name->len
396 };
397 struct rpc_message msg = {
398 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
399 .rpc_argp = &arg,
400 .rpc_resp = &dir_attr,
401 };
402 int status;
403
404 dprintk("NFS call remove %s\n", name->name);
405 dir_attr.valid = 0;
406 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
407 nfs_refresh_inode(dir, &dir_attr);
408 dprintk("NFS reply remove: %d\n", status);
409 return status;
410 }
411
412 static int
413 nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
414 {
415 struct unlinkxdr {
416 struct nfs3_diropargs arg;
417 struct nfs_fattr res;
418 } *ptr;
419
420 ptr = (struct unlinkxdr *)kmalloc(sizeof(*ptr), GFP_KERNEL);
421 if (!ptr)
422 return -ENOMEM;
423 ptr->arg.fh = NFS_FH(dir->d_inode);
424 ptr->arg.name = name->name;
425 ptr->arg.len = name->len;
426 ptr->res.valid = 0;
427 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
428 msg->rpc_argp = &ptr->arg;
429 msg->rpc_resp = &ptr->res;
430 return 0;
431 }
432
433 static int
434 nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
435 {
436 struct rpc_message *msg = &task->tk_msg;
437 struct nfs_fattr *dir_attr;
438
439 if (nfs3_async_handle_jukebox(task))
440 return 1;
441 if (msg->rpc_argp) {
442 dir_attr = (struct nfs_fattr*)msg->rpc_resp;
443 nfs_refresh_inode(dir->d_inode, dir_attr);
444 kfree(msg->rpc_argp);
445 }
446 return 0;
447 }
448
449 static int
450 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
451 struct inode *new_dir, struct qstr *new_name)
452 {
453 struct nfs_fattr old_dir_attr, new_dir_attr;
454 struct nfs3_renameargs arg = {
455 .fromfh = NFS_FH(old_dir),
456 .fromname = old_name->name,
457 .fromlen = old_name->len,
458 .tofh = NFS_FH(new_dir),
459 .toname = new_name->name,
460 .tolen = new_name->len
461 };
462 struct nfs3_renameres res = {
463 .fromattr = &old_dir_attr,
464 .toattr = &new_dir_attr
465 };
466 int status;
467
468 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
469 old_dir_attr.valid = 0;
470 new_dir_attr.valid = 0;
471 status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0);
472 nfs_refresh_inode(old_dir, &old_dir_attr);
473 nfs_refresh_inode(new_dir, &new_dir_attr);
474 dprintk("NFS reply rename: %d\n", status);
475 return status;
476 }
477
478 static int
479 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
480 {
481 struct nfs_fattr dir_attr, fattr;
482 struct nfs3_linkargs arg = {
483 .fromfh = NFS_FH(inode),
484 .tofh = NFS_FH(dir),
485 .toname = name->name,
486 .tolen = name->len
487 };
488 struct nfs3_linkres res = {
489 .dir_attr = &dir_attr,
490 .fattr = &fattr
491 };
492 int status;
493
494 dprintk("NFS call link %s\n", name->name);
495 dir_attr.valid = 0;
496 fattr.valid = 0;
497 status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0);
498 nfs_refresh_inode(dir, &dir_attr);
499 nfs_refresh_inode(inode, &fattr);
500 dprintk("NFS reply link: %d\n", status);
501 return status;
502 }
503
504 static int
505 nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
506 struct iattr *sattr, struct nfs_fh *fhandle,
507 struct nfs_fattr *fattr)
508 {
509 struct nfs_fattr dir_attr;
510 struct nfs3_symlinkargs arg = {
511 .fromfh = NFS_FH(dir),
512 .fromname = name->name,
513 .fromlen = name->len,
514 .topath = path->name,
515 .tolen = path->len,
516 .sattr = sattr
517 };
518 struct nfs3_diropres res = {
519 .dir_attr = &dir_attr,
520 .fh = fhandle,
521 .fattr = fattr
522 };
523 int status;
524
525 if (path->len > NFS3_MAXPATHLEN)
526 return -ENAMETOOLONG;
527 dprintk("NFS call symlink %s -> %s\n", name->name, path->name);
528 dir_attr.valid = 0;
529 fattr->valid = 0;
530 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0);
531 nfs_refresh_inode(dir, &dir_attr);
532 dprintk("NFS reply symlink: %d\n", status);
533 return status;
534 }
535
536 static int
537 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
538 {
539 struct nfs_fh fhandle;
540 struct nfs_fattr fattr, dir_attr;
541 struct nfs3_mkdirargs arg = {
542 .fh = NFS_FH(dir),
543 .name = dentry->d_name.name,
544 .len = dentry->d_name.len,
545 .sattr = sattr
546 };
547 struct nfs3_diropres res = {
548 .dir_attr = &dir_attr,
549 .fh = &fhandle,
550 .fattr = &fattr
551 };
552 int mode = sattr->ia_mode;
553 int status;
554
555 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
556 dir_attr.valid = 0;
557 fattr.valid = 0;
558
559 sattr->ia_mode &= ~current->fs->umask;
560
561 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0);
562 nfs_refresh_inode(dir, &dir_attr);
563 if (status != 0)
564 goto out;
565 status = nfs_instantiate(dentry, &fhandle, &fattr);
566 if (status != 0)
567 goto out;
568 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
569 out:
570 dprintk("NFS reply mkdir: %d\n", status);
571 return status;
572 }
573
574 static int
575 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
576 {
577 struct nfs_fattr dir_attr;
578 struct nfs3_diropargs arg = {
579 .fh = NFS_FH(dir),
580 .name = name->name,
581 .len = name->len
582 };
583 int status;
584
585 dprintk("NFS call rmdir %s\n", name->name);
586 dir_attr.valid = 0;
587 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0);
588 nfs_refresh_inode(dir, &dir_attr);
589 dprintk("NFS reply rmdir: %d\n", status);
590 return status;
591 }
592
593 /*
594 * The READDIR implementation is somewhat hackish - we pass the user buffer
595 * to the encode function, which installs it in the receive iovec.
596 * The decode function itself doesn't perform any decoding, it just makes
597 * sure the reply is syntactically correct.
598 *
599 * Also note that this implementation handles both plain readdir and
600 * readdirplus.
601 */
602 static int
603 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
604 u64 cookie, struct page *page, unsigned int count, int plus)
605 {
606 struct inode *dir = dentry->d_inode;
607 struct nfs_fattr dir_attr;
608 u32 *verf = NFS_COOKIEVERF(dir);
609 struct nfs3_readdirargs arg = {
610 .fh = NFS_FH(dir),
611 .cookie = cookie,
612 .verf = {verf[0], verf[1]},
613 .plus = plus,
614 .count = count,
615 .pages = &page
616 };
617 struct nfs3_readdirres res = {
618 .dir_attr = &dir_attr,
619 .verf = verf,
620 .plus = plus
621 };
622 struct rpc_message msg = {
623 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
624 .rpc_argp = &arg,
625 .rpc_resp = &res,
626 .rpc_cred = cred
627 };
628 int status;
629
630 lock_kernel();
631
632 if (plus)
633 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
634
635 dprintk("NFS call readdir%s %d\n",
636 plus? "plus" : "", (unsigned int) cookie);
637
638 dir_attr.valid = 0;
639 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
640 nfs_refresh_inode(dir, &dir_attr);
641 dprintk("NFS reply readdir: %d\n", status);
642 unlock_kernel();
643 return status;
644 }
645
646 static int
647 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
648 dev_t rdev)
649 {
650 struct nfs_fh fh;
651 struct nfs_fattr fattr, dir_attr;
652 struct nfs3_mknodargs arg = {
653 .fh = NFS_FH(dir),
654 .name = dentry->d_name.name,
655 .len = dentry->d_name.len,
656 .sattr = sattr,
657 .rdev = rdev
658 };
659 struct nfs3_diropres res = {
660 .dir_attr = &dir_attr,
661 .fh = &fh,
662 .fattr = &fattr
663 };
664 mode_t mode = sattr->ia_mode;
665 int status;
666
667 switch (sattr->ia_mode & S_IFMT) {
668 case S_IFBLK: arg.type = NF3BLK; break;
669 case S_IFCHR: arg.type = NF3CHR; break;
670 case S_IFIFO: arg.type = NF3FIFO; break;
671 case S_IFSOCK: arg.type = NF3SOCK; break;
672 default: return -EINVAL;
673 }
674
675 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
676 MAJOR(rdev), MINOR(rdev));
677
678 sattr->ia_mode &= ~current->fs->umask;
679
680 dir_attr.valid = 0;
681 fattr.valid = 0;
682 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0);
683 nfs_refresh_inode(dir, &dir_attr);
684 if (status != 0)
685 goto out;
686 status = nfs_instantiate(dentry, &fh, &fattr);
687 if (status != 0)
688 goto out;
689 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
690 out:
691 dprintk("NFS reply mknod: %d\n", status);
692 return status;
693 }
694
695 static int
696 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
697 struct nfs_fsstat *stat)
698 {
699 int status;
700
701 dprintk("NFS call fsstat\n");
702 stat->fattr->valid = 0;
703 status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, stat, 0);
704 dprintk("NFS reply statfs: %d\n", status);
705 return status;
706 }
707
708 static int
709 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
710 struct nfs_fsinfo *info)
711 {
712 int status;
713
714 dprintk("NFS call fsinfo\n");
715 info->fattr->valid = 0;
716 status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0);
717 dprintk("NFS reply fsinfo: %d\n", status);
718 return status;
719 }
720
721 static int
722 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
723 struct nfs_pathconf *info)
724 {
725 int status;
726
727 dprintk("NFS call pathconf\n");
728 info->fattr->valid = 0;
729 status = rpc_call(server->client, NFS3PROC_PATHCONF, fhandle, info, 0);
730 dprintk("NFS reply pathconf: %d\n", status);
731 return status;
732 }
733
734 extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
735
736 static void
737 nfs3_read_done(struct rpc_task *task)
738 {
739 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
740
741 if (nfs3_async_handle_jukebox(task))
742 return;
743 /* Call back common NFS readpage processing */
744 if (task->tk_status >= 0)
745 nfs_refresh_inode(data->inode, &data->fattr);
746 nfs_readpage_result(task);
747 }
748
749 static void
750 nfs3_proc_read_setup(struct nfs_read_data *data)
751 {
752 struct rpc_task *task = &data->task;
753 struct inode *inode = data->inode;
754 int flags;
755 struct rpc_message msg = {
756 .rpc_proc = &nfs3_procedures[NFS3PROC_READ],
757 .rpc_argp = &data->args,
758 .rpc_resp = &data->res,
759 .rpc_cred = data->cred,
760 };
761
762 /* N.B. Do we need to test? Never called for swapfile inode */
763 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
764
765 /* Finalize the task. */
766 rpc_init_task(task, NFS_CLIENT(inode), nfs3_read_done, flags);
767 rpc_call_setup(task, &msg, 0);
768 }
769
770 static void
771 nfs3_write_done(struct rpc_task *task)
772 {
773 struct nfs_write_data *data;
774
775 if (nfs3_async_handle_jukebox(task))
776 return;
777 data = (struct nfs_write_data *)task->tk_calldata;
778 if (task->tk_status >= 0)
779 nfs_refresh_inode(data->inode, data->res.fattr);
780 nfs_writeback_done(task);
781 }
782
783 static void
784 nfs3_proc_write_setup(struct nfs_write_data *data, int how)
785 {
786 struct rpc_task *task = &data->task;
787 struct inode *inode = data->inode;
788 int stable;
789 int flags;
790 struct rpc_message msg = {
791 .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE],
792 .rpc_argp = &data->args,
793 .rpc_resp = &data->res,
794 .rpc_cred = data->cred,
795 };
796
797 if (how & FLUSH_STABLE) {
798 if (!NFS_I(inode)->ncommit)
799 stable = NFS_FILE_SYNC;
800 else
801 stable = NFS_DATA_SYNC;
802 } else
803 stable = NFS_UNSTABLE;
804 data->args.stable = stable;
805
806 /* Set the initial flags for the task. */
807 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
808
809 /* Finalize the task. */
810 rpc_init_task(task, NFS_CLIENT(inode), nfs3_write_done, flags);
811 rpc_call_setup(task, &msg, 0);
812 }
813
814 static void
815 nfs3_commit_done(struct rpc_task *task)
816 {
817 struct nfs_write_data *data;
818
819 if (nfs3_async_handle_jukebox(task))
820 return;
821 data = (struct nfs_write_data *)task->tk_calldata;
822 if (task->tk_status >= 0)
823 nfs_refresh_inode(data->inode, data->res.fattr);
824 nfs_commit_done(task);
825 }
826
827 static void
828 nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
829 {
830 struct rpc_task *task = &data->task;
831 struct inode *inode = data->inode;
832 int flags;
833 struct rpc_message msg = {
834 .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT],
835 .rpc_argp = &data->args,
836 .rpc_resp = &data->res,
837 .rpc_cred = data->cred,
838 };
839
840 /* Set the initial flags for the task. */
841 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
842
843 /* Finalize the task. */
844 rpc_init_task(task, NFS_CLIENT(inode), nfs3_commit_done, flags);
845 rpc_call_setup(task, &msg, 0);
846 }
847
848 static int
849 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
850 {
851 return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
852 }
853
854 struct nfs_rpc_ops nfs_v3_clientops = {
855 .version = 3, /* protocol version */
856 .dentry_ops = &nfs_dentry_operations,
857 .dir_inode_ops = &nfs3_dir_inode_operations,
858 .file_inode_ops = &nfs3_file_inode_operations,
859 .getroot = nfs3_proc_get_root,
860 .getattr = nfs3_proc_getattr,
861 .setattr = nfs3_proc_setattr,
862 .lookup = nfs3_proc_lookup,
863 .access = nfs3_proc_access,
864 .readlink = nfs3_proc_readlink,
865 .read = nfs3_proc_read,
866 .write = nfs3_proc_write,
867 .commit = nfs3_proc_commit,
868 .create = nfs3_proc_create,
869 .remove = nfs3_proc_remove,
870 .unlink_setup = nfs3_proc_unlink_setup,
871 .unlink_done = nfs3_proc_unlink_done,
872 .rename = nfs3_proc_rename,
873 .link = nfs3_proc_link,
874 .symlink = nfs3_proc_symlink,
875 .mkdir = nfs3_proc_mkdir,
876 .rmdir = nfs3_proc_rmdir,
877 .readdir = nfs3_proc_readdir,
878 .mknod = nfs3_proc_mknod,
879 .statfs = nfs3_proc_statfs,
880 .fsinfo = nfs3_proc_fsinfo,
881 .pathconf = nfs3_proc_pathconf,
882 .decode_dirent = nfs3_decode_dirent,
883 .read_setup = nfs3_proc_read_setup,
884 .write_setup = nfs3_proc_write_setup,
885 .commit_setup = nfs3_proc_commit_setup,
886 .file_open = nfs_open,
887 .file_release = nfs_release,
888 .lock = nfs3_proc_lock,
889 .clear_acl_cache = nfs3_forget_cached_acls,
890 };
Linux for Ginger Game Console