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/errno.h>
11 #include <linux/string.h>
12 #include <linux/sunrpc/clnt.h>
13 #include <linux/slab.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>
20 #include <linux/freezer.h>
21
22 #include "iostat.h"
23 #include "internal.h"
24
25 #define NFSDBG_FACILITY NFSDBG_PROC
26
27 /* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */
28 static int
nfs3_rpc_wrapper(struct rpc_clnt * clnt,struct rpc_message * msg,int flags)29 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
30 {
31 int res;
32 do {
33 res = rpc_call_sync(clnt, msg, flags);
34 if (res != -EJUKEBOX && res != -EKEYEXPIRED)
35 break;
36 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
37 res = -ERESTARTSYS;
38 } while (!fatal_signal_pending(current));
39 return res;
40 }
41
42 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
43
44 static int
nfs3_async_handle_jukebox(struct rpc_task * task,struct inode * inode)45 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
46 {
47 if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED)
48 return 0;
49 if (task->tk_status == -EJUKEBOX)
50 nfs_inc_stats(inode, NFSIOS_DELAY);
51 task->tk_status = 0;
52 rpc_restart_call(task);
53 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
54 return 1;
55 }
56
57 static int
do_proc_get_root(struct rpc_clnt * client,struct nfs_fh * fhandle,struct nfs_fsinfo * info)58 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
59 struct nfs_fsinfo *info)
60 {
61 struct rpc_message msg = {
62 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
63 .rpc_argp = fhandle,
64 .rpc_resp = info,
65 };
66 int status;
67
68 dprintk("%s: call fsinfo\n", __func__);
69 nfs_fattr_init(info->fattr);
70 status = rpc_call_sync(client, &msg, 0);
71 dprintk("%s: reply fsinfo: %d\n", __func__, status);
72 if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
73 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
74 msg.rpc_resp = info->fattr;
75 status = rpc_call_sync(client, &msg, 0);
76 dprintk("%s: reply getattr: %d\n", __func__, status);
77 }
78 return status;
79 }
80
81 /*
82 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
83 */
84 static int
nfs3_proc_get_root(struct nfs_server * server,struct nfs_fh * fhandle,struct nfs_fsinfo * info)85 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
86 struct nfs_fsinfo *info)
87 {
88 int status;
89
90 status = do_proc_get_root(server->client, fhandle, info);
91 if (status && server->nfs_client->cl_rpcclient != server->client)
92 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
93 return status;
94 }
95
96 /*
97 * One function for each procedure in the NFS protocol.
98 */
99 static int
nfs3_proc_getattr(struct nfs_server * server,struct nfs_fh * fhandle,struct nfs_fattr * fattr)100 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
101 struct nfs_fattr *fattr)
102 {
103 struct rpc_message msg = {
104 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
105 .rpc_argp = fhandle,
106 .rpc_resp = fattr,
107 };
108 int status;
109
110 dprintk("NFS call getattr\n");
111 nfs_fattr_init(fattr);
112 status = rpc_call_sync(server->client, &msg, 0);
113 dprintk("NFS reply getattr: %d\n", status);
114 return status;
115 }
116
117 static int
nfs3_proc_setattr(struct dentry * dentry,struct nfs_fattr * fattr,struct iattr * sattr)118 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
119 struct iattr *sattr)
120 {
121 struct inode *inode = dentry->d_inode;
122 struct nfs3_sattrargs arg = {
123 .fh = NFS_FH(inode),
124 .sattr = sattr,
125 };
126 struct rpc_message msg = {
127 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
128 .rpc_argp = &arg,
129 .rpc_resp = fattr,
130 };
131 int status;
132
133 dprintk("NFS call setattr\n");
134 if (sattr->ia_valid & ATTR_FILE)
135 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
136 nfs_fattr_init(fattr);
137 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
138 if (status == 0)
139 nfs_setattr_update_inode(inode, sattr);
140 dprintk("NFS reply setattr: %d\n", status);
141 return status;
142 }
143
144 static int
nfs3_proc_lookup(struct rpc_clnt * clnt,struct inode * dir,struct qstr * name,struct nfs_fh * fhandle,struct nfs_fattr * fattr)145 nfs3_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
146 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
147 {
148 struct nfs3_diropargs arg = {
149 .fh = NFS_FH(dir),
150 .name = name->name,
151 .len = name->len
152 };
153 struct nfs3_diropres res = {
154 .fh = fhandle,
155 .fattr = fattr
156 };
157 struct rpc_message msg = {
158 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
159 .rpc_argp = &arg,
160 .rpc_resp = &res,
161 };
162 int status;
163
164 dprintk("NFS call lookup %s\n", name->name);
165 res.dir_attr = nfs_alloc_fattr();
166 if (res.dir_attr == NULL)
167 return -ENOMEM;
168
169 nfs_fattr_init(fattr);
170 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
171 nfs_refresh_inode(dir, res.dir_attr);
172 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
173 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
174 msg.rpc_argp = fhandle;
175 msg.rpc_resp = fattr;
176 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
177 }
178 nfs_free_fattr(res.dir_attr);
179 dprintk("NFS reply lookup: %d\n", status);
180 return status;
181 }
182
nfs3_proc_access(struct inode * inode,struct nfs_access_entry * entry)183 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
184 {
185 struct nfs3_accessargs arg = {
186 .fh = NFS_FH(inode),
187 };
188 struct nfs3_accessres res;
189 struct rpc_message msg = {
190 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
191 .rpc_argp = &arg,
192 .rpc_resp = &res,
193 .rpc_cred = entry->cred,
194 };
195 int mode = entry->mask;
196 int status = -ENOMEM;
197
198 dprintk("NFS call access\n");
199
200 if (mode & MAY_READ)
201 arg.access |= NFS3_ACCESS_READ;
202 if (S_ISDIR(inode->i_mode)) {
203 if (mode & MAY_WRITE)
204 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
205 if (mode & MAY_EXEC)
206 arg.access |= NFS3_ACCESS_LOOKUP;
207 } else {
208 if (mode & MAY_WRITE)
209 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
210 if (mode & MAY_EXEC)
211 arg.access |= NFS3_ACCESS_EXECUTE;
212 }
213
214 res.fattr = nfs_alloc_fattr();
215 if (res.fattr == NULL)
216 goto out;
217
218 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
219 nfs_refresh_inode(inode, res.fattr);
220 if (status == 0) {
221 entry->mask = 0;
222 if (res.access & NFS3_ACCESS_READ)
223 entry->mask |= MAY_READ;
224 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
225 entry->mask |= MAY_WRITE;
226 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
227 entry->mask |= MAY_EXEC;
228 }
229 nfs_free_fattr(res.fattr);
230 out:
231 dprintk("NFS reply access: %d\n", status);
232 return status;
233 }
234
nfs3_proc_readlink(struct inode * inode,struct page * page,unsigned int pgbase,unsigned int pglen)235 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
236 unsigned int pgbase, unsigned int pglen)
237 {
238 struct nfs_fattr *fattr;
239 struct nfs3_readlinkargs args = {
240 .fh = NFS_FH(inode),
241 .pgbase = pgbase,
242 .pglen = pglen,
243 .pages = &page
244 };
245 struct rpc_message msg = {
246 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
247 .rpc_argp = &args,
248 };
249 int status = -ENOMEM;
250
251 dprintk("NFS call readlink\n");
252 fattr = nfs_alloc_fattr();
253 if (fattr == NULL)
254 goto out;
255 msg.rpc_resp = fattr;
256
257 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
258 nfs_refresh_inode(inode, fattr);
259 nfs_free_fattr(fattr);
260 out:
261 dprintk("NFS reply readlink: %d\n", status);
262 return status;
263 }
264
265 struct nfs3_createdata {
266 struct rpc_message msg;
267 union {
268 struct nfs3_createargs create;
269 struct nfs3_mkdirargs mkdir;
270 struct nfs3_symlinkargs symlink;
271 struct nfs3_mknodargs mknod;
272 } arg;
273 struct nfs3_diropres res;
274 struct nfs_fh fh;
275 struct nfs_fattr fattr;
276 struct nfs_fattr dir_attr;
277 };
278
nfs3_alloc_createdata(void)279 static struct nfs3_createdata *nfs3_alloc_createdata(void)
280 {
281 struct nfs3_createdata *data;
282
283 data = kzalloc(sizeof(*data), GFP_KERNEL);
284 if (data != NULL) {
285 data->msg.rpc_argp = &data->arg;
286 data->msg.rpc_resp = &data->res;
287 data->res.fh = &data->fh;
288 data->res.fattr = &data->fattr;
289 data->res.dir_attr = &data->dir_attr;
290 nfs_fattr_init(data->res.fattr);
291 nfs_fattr_init(data->res.dir_attr);
292 }
293 return data;
294 }
295
nfs3_do_create(struct inode * dir,struct dentry * dentry,struct nfs3_createdata * data)296 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
297 {
298 int status;
299
300 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
301 nfs_post_op_update_inode(dir, data->res.dir_attr);
302 if (status == 0)
303 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
304 return status;
305 }
306
nfs3_free_createdata(struct nfs3_createdata * data)307 static void nfs3_free_createdata(struct nfs3_createdata *data)
308 {
309 kfree(data);
310 }
311
312 /*
313 * Create a regular file.
314 */
315 static int
nfs3_proc_create(struct inode * dir,struct dentry * dentry,struct iattr * sattr,int flags,struct nfs_open_context * ctx)316 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
317 int flags, struct nfs_open_context *ctx)
318 {
319 struct nfs3_createdata *data;
320 umode_t mode = sattr->ia_mode;
321 int status = -ENOMEM;
322
323 dprintk("NFS call create %s\n", dentry->d_name.name);
324
325 data = nfs3_alloc_createdata();
326 if (data == NULL)
327 goto out;
328
329 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
330 data->arg.create.fh = NFS_FH(dir);
331 data->arg.create.name = dentry->d_name.name;
332 data->arg.create.len = dentry->d_name.len;
333 data->arg.create.sattr = sattr;
334
335 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
336 if (flags & O_EXCL) {
337 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
338 data->arg.create.verifier[0] = jiffies;
339 data->arg.create.verifier[1] = current->pid;
340 }
341
342 sattr->ia_mode &= ~current_umask();
343
344 for (;;) {
345 status = nfs3_do_create(dir, dentry, data);
346
347 if (status != -ENOTSUPP)
348 break;
349 /* If the server doesn't support the exclusive creation
350 * semantics, try again with simple 'guarded' mode. */
351 switch (data->arg.create.createmode) {
352 case NFS3_CREATE_EXCLUSIVE:
353 data->arg.create.createmode = NFS3_CREATE_GUARDED;
354 break;
355
356 case NFS3_CREATE_GUARDED:
357 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
358 break;
359
360 case NFS3_CREATE_UNCHECKED:
361 goto out;
362 }
363 nfs_fattr_init(data->res.dir_attr);
364 nfs_fattr_init(data->res.fattr);
365 }
366
367 if (status != 0)
368 goto out;
369
370 /* When we created the file with exclusive semantics, make
371 * sure we set the attributes afterwards. */
372 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
373 dprintk("NFS call setattr (post-create)\n");
374
375 if (!(sattr->ia_valid & ATTR_ATIME_SET))
376 sattr->ia_valid |= ATTR_ATIME;
377 if (!(sattr->ia_valid & ATTR_MTIME_SET))
378 sattr->ia_valid |= ATTR_MTIME;
379
380 /* Note: we could use a guarded setattr here, but I'm
381 * not sure this buys us anything (and I'd have
382 * to revamp the NFSv3 XDR code) */
383 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
384 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
385 dprintk("NFS reply setattr (post-create): %d\n", status);
386 if (status != 0)
387 goto out;
388 }
389 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
390 out:
391 nfs3_free_createdata(data);
392 dprintk("NFS reply create: %d\n", status);
393 return status;
394 }
395
396 static int
nfs3_proc_remove(struct inode * dir,struct qstr * name)397 nfs3_proc_remove(struct inode *dir, struct qstr *name)
398 {
399 struct nfs_removeargs arg = {
400 .fh = NFS_FH(dir),
401 .name.len = name->len,
402 .name.name = name->name,
403 };
404 struct nfs_removeres res;
405 struct rpc_message msg = {
406 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
407 .rpc_argp = &arg,
408 .rpc_resp = &res,
409 };
410 int status = -ENOMEM;
411
412 dprintk("NFS call remove %s\n", name->name);
413 res.dir_attr = nfs_alloc_fattr();
414 if (res.dir_attr == NULL)
415 goto out;
416
417 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
418 nfs_post_op_update_inode(dir, res.dir_attr);
419 nfs_free_fattr(res.dir_attr);
420 out:
421 dprintk("NFS reply remove: %d\n", status);
422 return status;
423 }
424
425 static void
nfs3_proc_unlink_setup(struct rpc_message * msg,struct inode * dir)426 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
427 {
428 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
429 }
430
nfs3_proc_unlink_rpc_prepare(struct rpc_task * task,struct nfs_unlinkdata * data)431 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
432 {
433 rpc_call_start(task);
434 }
435
436 static int
nfs3_proc_unlink_done(struct rpc_task * task,struct inode * dir)437 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
438 {
439 struct nfs_removeres *res;
440 if (nfs3_async_handle_jukebox(task, dir))
441 return 0;
442 res = task->tk_msg.rpc_resp;
443 nfs_post_op_update_inode(dir, res->dir_attr);
444 return 1;
445 }
446
447 static void
nfs3_proc_rename_setup(struct rpc_message * msg,struct inode * dir)448 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
449 {
450 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
451 }
452
nfs3_proc_rename_rpc_prepare(struct rpc_task * task,struct nfs_renamedata * data)453 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
454 {
455 rpc_call_start(task);
456 }
457
458 static int
nfs3_proc_rename_done(struct rpc_task * task,struct inode * old_dir,struct inode * new_dir)459 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
460 struct inode *new_dir)
461 {
462 struct nfs_renameres *res;
463
464 if (nfs3_async_handle_jukebox(task, old_dir))
465 return 0;
466 res = task->tk_msg.rpc_resp;
467
468 nfs_post_op_update_inode(old_dir, res->old_fattr);
469 nfs_post_op_update_inode(new_dir, res->new_fattr);
470 return 1;
471 }
472
473 static int
nfs3_proc_rename(struct inode * old_dir,struct qstr * old_name,struct inode * new_dir,struct qstr * new_name)474 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
475 struct inode *new_dir, struct qstr *new_name)
476 {
477 struct nfs_renameargs arg = {
478 .old_dir = NFS_FH(old_dir),
479 .old_name = old_name,
480 .new_dir = NFS_FH(new_dir),
481 .new_name = new_name,
482 };
483 struct nfs_renameres res;
484 struct rpc_message msg = {
485 .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME],
486 .rpc_argp = &arg,
487 .rpc_resp = &res,
488 };
489 int status = -ENOMEM;
490
491 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
492
493 res.old_fattr = nfs_alloc_fattr();
494 res.new_fattr = nfs_alloc_fattr();
495 if (res.old_fattr == NULL || res.new_fattr == NULL)
496 goto out;
497
498 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
499 nfs_post_op_update_inode(old_dir, res.old_fattr);
500 nfs_post_op_update_inode(new_dir, res.new_fattr);
501 out:
502 nfs_free_fattr(res.old_fattr);
503 nfs_free_fattr(res.new_fattr);
504 dprintk("NFS reply rename: %d\n", status);
505 return status;
506 }
507
508 static int
nfs3_proc_link(struct inode * inode,struct inode * dir,struct qstr * name)509 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
510 {
511 struct nfs3_linkargs arg = {
512 .fromfh = NFS_FH(inode),
513 .tofh = NFS_FH(dir),
514 .toname = name->name,
515 .tolen = name->len
516 };
517 struct nfs3_linkres res;
518 struct rpc_message msg = {
519 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
520 .rpc_argp = &arg,
521 .rpc_resp = &res,
522 };
523 int status = -ENOMEM;
524
525 dprintk("NFS call link %s\n", name->name);
526 res.fattr = nfs_alloc_fattr();
527 res.dir_attr = nfs_alloc_fattr();
528 if (res.fattr == NULL || res.dir_attr == NULL)
529 goto out;
530
531 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
532 nfs_post_op_update_inode(dir, res.dir_attr);
533 nfs_post_op_update_inode(inode, res.fattr);
534 out:
535 nfs_free_fattr(res.dir_attr);
536 nfs_free_fattr(res.fattr);
537 dprintk("NFS reply link: %d\n", status);
538 return status;
539 }
540
541 static int
nfs3_proc_symlink(struct inode * dir,struct dentry * dentry,struct page * page,unsigned int len,struct iattr * sattr)542 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
543 unsigned int len, struct iattr *sattr)
544 {
545 struct nfs3_createdata *data;
546 int status = -ENOMEM;
547
548 if (len > NFS3_MAXPATHLEN)
549 return -ENAMETOOLONG;
550
551 dprintk("NFS call symlink %s\n", dentry->d_name.name);
552
553 data = nfs3_alloc_createdata();
554 if (data == NULL)
555 goto out;
556 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
557 data->arg.symlink.fromfh = NFS_FH(dir);
558 data->arg.symlink.fromname = dentry->d_name.name;
559 data->arg.symlink.fromlen = dentry->d_name.len;
560 data->arg.symlink.pages = &page;
561 data->arg.symlink.pathlen = len;
562 data->arg.symlink.sattr = sattr;
563
564 status = nfs3_do_create(dir, dentry, data);
565
566 nfs3_free_createdata(data);
567 out:
568 dprintk("NFS reply symlink: %d\n", status);
569 return status;
570 }
571
572 static int
nfs3_proc_mkdir(struct inode * dir,struct dentry * dentry,struct iattr * sattr)573 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
574 {
575 struct nfs3_createdata *data;
576 umode_t mode = sattr->ia_mode;
577 int status = -ENOMEM;
578
579 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
580
581 sattr->ia_mode &= ~current_umask();
582
583 data = nfs3_alloc_createdata();
584 if (data == NULL)
585 goto out;
586
587 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
588 data->arg.mkdir.fh = NFS_FH(dir);
589 data->arg.mkdir.name = dentry->d_name.name;
590 data->arg.mkdir.len = dentry->d_name.len;
591 data->arg.mkdir.sattr = sattr;
592
593 status = nfs3_do_create(dir, dentry, data);
594 if (status != 0)
595 goto out;
596
597 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
598 out:
599 nfs3_free_createdata(data);
600 dprintk("NFS reply mkdir: %d\n", status);
601 return status;
602 }
603
604 static int
nfs3_proc_rmdir(struct inode * dir,struct qstr * name)605 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
606 {
607 struct nfs_fattr *dir_attr;
608 struct nfs3_diropargs arg = {
609 .fh = NFS_FH(dir),
610 .name = name->name,
611 .len = name->len
612 };
613 struct rpc_message msg = {
614 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
615 .rpc_argp = &arg,
616 };
617 int status = -ENOMEM;
618
619 dprintk("NFS call rmdir %s\n", name->name);
620 dir_attr = nfs_alloc_fattr();
621 if (dir_attr == NULL)
622 goto out;
623
624 msg.rpc_resp = dir_attr;
625 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
626 nfs_post_op_update_inode(dir, dir_attr);
627 nfs_free_fattr(dir_attr);
628 out:
629 dprintk("NFS reply rmdir: %d\n", status);
630 return status;
631 }
632
633 /*
634 * The READDIR implementation is somewhat hackish - we pass the user buffer
635 * to the encode function, which installs it in the receive iovec.
636 * The decode function itself doesn't perform any decoding, it just makes
637 * sure the reply is syntactically correct.
638 *
639 * Also note that this implementation handles both plain readdir and
640 * readdirplus.
641 */
642 static int
nfs3_proc_readdir(struct dentry * dentry,struct rpc_cred * cred,u64 cookie,struct page ** pages,unsigned int count,int plus)643 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
644 u64 cookie, struct page **pages, unsigned int count, int plus)
645 {
646 struct inode *dir = dentry->d_inode;
647 __be32 *verf = NFS_I(dir)->cookieverf;
648 struct nfs3_readdirargs arg = {
649 .fh = NFS_FH(dir),
650 .cookie = cookie,
651 .verf = {verf[0], verf[1]},
652 .plus = plus,
653 .count = count,
654 .pages = pages
655 };
656 struct nfs3_readdirres res = {
657 .verf = verf,
658 .plus = plus
659 };
660 struct rpc_message msg = {
661 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
662 .rpc_argp = &arg,
663 .rpc_resp = &res,
664 .rpc_cred = cred
665 };
666 int status = -ENOMEM;
667
668 if (plus)
669 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
670
671 dprintk("NFS call readdir%s %d\n",
672 plus? "plus" : "", (unsigned int) cookie);
673
674 res.dir_attr = nfs_alloc_fattr();
675 if (res.dir_attr == NULL)
676 goto out;
677
678 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
679
680 nfs_invalidate_atime(dir);
681 nfs_refresh_inode(dir, res.dir_attr);
682
683 nfs_free_fattr(res.dir_attr);
684 out:
685 dprintk("NFS reply readdir%s: %d\n",
686 plus? "plus" : "", status);
687 return status;
688 }
689
690 static int
nfs3_proc_mknod(struct inode * dir,struct dentry * dentry,struct iattr * sattr,dev_t rdev)691 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
692 dev_t rdev)
693 {
694 struct nfs3_createdata *data;
695 umode_t mode = sattr->ia_mode;
696 int status = -ENOMEM;
697
698 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
699 MAJOR(rdev), MINOR(rdev));
700
701 sattr->ia_mode &= ~current_umask();
702
703 data = nfs3_alloc_createdata();
704 if (data == NULL)
705 goto out;
706
707 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
708 data->arg.mknod.fh = NFS_FH(dir);
709 data->arg.mknod.name = dentry->d_name.name;
710 data->arg.mknod.len = dentry->d_name.len;
711 data->arg.mknod.sattr = sattr;
712 data->arg.mknod.rdev = rdev;
713
714 switch (sattr->ia_mode & S_IFMT) {
715 case S_IFBLK:
716 data->arg.mknod.type = NF3BLK;
717 break;
718 case S_IFCHR:
719 data->arg.mknod.type = NF3CHR;
720 break;
721 case S_IFIFO:
722 data->arg.mknod.type = NF3FIFO;
723 break;
724 case S_IFSOCK:
725 data->arg.mknod.type = NF3SOCK;
726 break;
727 default:
728 status = -EINVAL;
729 goto out;
730 }
731
732 status = nfs3_do_create(dir, dentry, data);
733 if (status != 0)
734 goto out;
735 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
736 out:
737 nfs3_free_createdata(data);
738 dprintk("NFS reply mknod: %d\n", status);
739 return status;
740 }
741
742 static int
nfs3_proc_statfs(struct nfs_server * server,struct nfs_fh * fhandle,struct nfs_fsstat * stat)743 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
744 struct nfs_fsstat *stat)
745 {
746 struct rpc_message msg = {
747 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
748 .rpc_argp = fhandle,
749 .rpc_resp = stat,
750 };
751 int status;
752
753 dprintk("NFS call fsstat\n");
754 nfs_fattr_init(stat->fattr);
755 status = rpc_call_sync(server->client, &msg, 0);
756 dprintk("NFS reply fsstat: %d\n", status);
757 return status;
758 }
759
760 static int
do_proc_fsinfo(struct rpc_clnt * client,struct nfs_fh * fhandle,struct nfs_fsinfo * info)761 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
762 struct nfs_fsinfo *info)
763 {
764 struct rpc_message msg = {
765 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
766 .rpc_argp = fhandle,
767 .rpc_resp = info,
768 };
769 int status;
770
771 dprintk("NFS call fsinfo\n");
772 nfs_fattr_init(info->fattr);
773 status = rpc_call_sync(client, &msg, 0);
774 dprintk("NFS reply fsinfo: %d\n", status);
775 return status;
776 }
777
778 /*
779 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
780 * nfs_create_server
781 */
782 static int
nfs3_proc_fsinfo(struct nfs_server * server,struct nfs_fh * fhandle,struct nfs_fsinfo * info)783 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
784 struct nfs_fsinfo *info)
785 {
786 int status;
787
788 status = do_proc_fsinfo(server->client, fhandle, info);
789 if (status && server->nfs_client->cl_rpcclient != server->client)
790 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
791 return status;
792 }
793
794 static int
nfs3_proc_pathconf(struct nfs_server * server,struct nfs_fh * fhandle,struct nfs_pathconf * info)795 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
796 struct nfs_pathconf *info)
797 {
798 struct rpc_message msg = {
799 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
800 .rpc_argp = fhandle,
801 .rpc_resp = info,
802 };
803 int status;
804
805 dprintk("NFS call pathconf\n");
806 nfs_fattr_init(info->fattr);
807 status = rpc_call_sync(server->client, &msg, 0);
808 dprintk("NFS reply pathconf: %d\n", status);
809 return status;
810 }
811
nfs3_read_done(struct rpc_task * task,struct nfs_read_data * data)812 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
813 {
814 if (nfs3_async_handle_jukebox(task, data->inode))
815 return -EAGAIN;
816
817 nfs_invalidate_atime(data->inode);
818 nfs_refresh_inode(data->inode, &data->fattr);
819 return 0;
820 }
821
nfs3_proc_read_setup(struct nfs_read_data * data,struct rpc_message * msg)822 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
823 {
824 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
825 }
826
nfs3_proc_read_rpc_prepare(struct rpc_task * task,struct nfs_read_data * data)827 static void nfs3_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
828 {
829 rpc_call_start(task);
830 }
831
nfs3_write_done(struct rpc_task * task,struct nfs_write_data * data)832 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
833 {
834 if (nfs3_async_handle_jukebox(task, data->inode))
835 return -EAGAIN;
836 if (task->tk_status >= 0)
837 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
838 return 0;
839 }
840
nfs3_proc_write_setup(struct nfs_write_data * data,struct rpc_message * msg)841 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
842 {
843 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
844 }
845
nfs3_proc_write_rpc_prepare(struct rpc_task * task,struct nfs_write_data * data)846 static void nfs3_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
847 {
848 rpc_call_start(task);
849 }
850
nfs3_commit_done(struct rpc_task * task,struct nfs_write_data * data)851 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
852 {
853 if (nfs3_async_handle_jukebox(task, data->inode))
854 return -EAGAIN;
855 nfs_refresh_inode(data->inode, data->res.fattr);
856 return 0;
857 }
858
nfs3_proc_commit_setup(struct nfs_write_data * data,struct rpc_message * msg)859 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
860 {
861 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
862 }
863
864 static int
nfs3_proc_lock(struct file * filp,int cmd,struct file_lock * fl)865 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
866 {
867 struct inode *inode = filp->f_path.dentry->d_inode;
868
869 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
870 }
871
872 const struct nfs_rpc_ops nfs_v3_clientops = {
873 .version = 3, /* protocol version */
874 .dentry_ops = &nfs_dentry_operations,
875 .dir_inode_ops = &nfs3_dir_inode_operations,
876 .file_inode_ops = &nfs3_file_inode_operations,
877 .file_ops = &nfs_file_operations,
878 .getroot = nfs3_proc_get_root,
879 .getattr = nfs3_proc_getattr,
880 .setattr = nfs3_proc_setattr,
881 .lookup = nfs3_proc_lookup,
882 .access = nfs3_proc_access,
883 .readlink = nfs3_proc_readlink,
884 .create = nfs3_proc_create,
885 .remove = nfs3_proc_remove,
886 .unlink_setup = nfs3_proc_unlink_setup,
887 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
888 .unlink_done = nfs3_proc_unlink_done,
889 .rename = nfs3_proc_rename,
890 .rename_setup = nfs3_proc_rename_setup,
891 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
892 .rename_done = nfs3_proc_rename_done,
893 .link = nfs3_proc_link,
894 .symlink = nfs3_proc_symlink,
895 .mkdir = nfs3_proc_mkdir,
896 .rmdir = nfs3_proc_rmdir,
897 .readdir = nfs3_proc_readdir,
898 .mknod = nfs3_proc_mknod,
899 .statfs = nfs3_proc_statfs,
900 .fsinfo = nfs3_proc_fsinfo,
901 .pathconf = nfs3_proc_pathconf,
902 .decode_dirent = nfs3_decode_dirent,
903 .read_setup = nfs3_proc_read_setup,
904 .read_rpc_prepare = nfs3_proc_read_rpc_prepare,
905 .read_done = nfs3_read_done,
906 .write_setup = nfs3_proc_write_setup,
907 .write_rpc_prepare = nfs3_proc_write_rpc_prepare,
908 .write_done = nfs3_write_done,
909 .commit_setup = nfs3_proc_commit_setup,
910 .commit_done = nfs3_commit_done,
911 .lock = nfs3_proc_lock,
912 .clear_acl_cache = nfs3_forget_cached_acls,
913 .close_context = nfs_close_context,
914 .init_client = nfs_init_client,
915 };
916