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1/*
2 * linux/fs/nfs/proc.c
3 *
4 * Copyright (C) 1992, 1993, 1994 Rick Sladkey
5 *
6 * OS-independent nfs remote procedure call functions
7 *
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
10 * Sun server.
11 *
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.
15 *
16 * Also, the code currently doesn't check the size of the packet, when
17 * it decodes the packet.
18 *
19 * Feel free to fix it and mail me the diffs if it worries you.
20 *
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
24 *
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
27 * incomplete struct).
28 */
29
30#include <linux/types.h>
31#include <linux/param.h>
32#include <linux/time.h>
33#include <linux/mm.h>
34#include <linux/errno.h>
35#include <linux/string.h>
36#include <linux/in.h>
37#include <linux/pagemap.h>
38#include <linux/sunrpc/clnt.h>
39#include <linux/nfs.h>
40#include <linux/nfs2.h>
41#include <linux/nfs_fs.h>
42#include <linux/nfs_page.h>
43#include <linux/lockd/bind.h>
44#include "internal.h"
45
46#define NFSDBG_FACILITY NFSDBG_PROC
47
48/*
49 * wrapper to handle the -EKEYEXPIRED error message. This should generally
50 * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't
51 * support the NFSERR_JUKEBOX error code, but we handle this situation in the
52 * same way that we handle that error with NFSv3.
53 */
54static int
55nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
56{
57 int res;
58 do {
59 res = rpc_call_sync(clnt, msg, flags);
60 if (res != -EKEYEXPIRED)
61 break;
62 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
63 res = -ERESTARTSYS;
64 } while (!fatal_signal_pending(current));
65 return res;
66}
67
68#define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags)
69
70static int
71nfs_async_handle_expired_key(struct rpc_task *task)
72{
73 if (task->tk_status != -EKEYEXPIRED)
74 return 0;
75 task->tk_status = 0;
76 rpc_restart_call(task);
77 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
78 return 1;
79}
80
81/*
82 * Bare-bones access to getattr: this is for nfs_read_super.
83 */
84static int
85nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
86 struct nfs_fsinfo *info)
87{
88 struct nfs_fattr *fattr = info->fattr;
89 struct nfs2_fsstat fsinfo;
90 struct rpc_message msg = {
91 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
92 .rpc_argp = fhandle,
93 .rpc_resp = fattr,
94 };
95 int status;
96
97 dprintk("%s: call getattr\n", __func__);
98 nfs_fattr_init(fattr);
99 status = rpc_call_sync(server->client, &msg, 0);
100 /* Retry with default authentication if different */
101 if (status && server->nfs_client->cl_rpcclient != server->client)
102 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
103 dprintk("%s: reply getattr: %d\n", __func__, status);
104 if (status)
105 return status;
106 dprintk("%s: call statfs\n", __func__);
107 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
108 msg.rpc_resp = &fsinfo;
109 status = rpc_call_sync(server->client, &msg, 0);
110 /* Retry with default authentication if different */
111 if (status && server->nfs_client->cl_rpcclient != server->client)
112 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
113 dprintk("%s: reply statfs: %d\n", __func__, status);
114 if (status)
115 return status;
116 info->rtmax = NFS_MAXDATA;
117 info->rtpref = fsinfo.tsize;
118 info->rtmult = fsinfo.bsize;
119 info->wtmax = NFS_MAXDATA;
120 info->wtpref = fsinfo.tsize;
121 info->wtmult = fsinfo.bsize;
122 info->dtpref = fsinfo.tsize;
123 info->maxfilesize = 0x7FFFFFFF;
124 info->lease_time = 0;
125 return 0;
126}
127
128/*
129 * One function for each procedure in the NFS protocol.
130 */
131static int
132nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
133 struct nfs_fattr *fattr)
134{
135 struct rpc_message msg = {
136 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
137 .rpc_argp = fhandle,
138 .rpc_resp = fattr,
139 };
140 int status;
141
142 dprintk("NFS call getattr\n");
143 nfs_fattr_init(fattr);
144 status = rpc_call_sync(server->client, &msg, 0);
145 dprintk("NFS reply getattr: %d\n", status);
146 return status;
147}
148
149static int
150nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
151 struct iattr *sattr)
152{
153 struct inode *inode = dentry->d_inode;
154 struct nfs_sattrargs arg = {
155 .fh = NFS_FH(inode),
156 .sattr = sattr
157 };
158 struct rpc_message msg = {
159 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR],
160 .rpc_argp = &arg,
161 .rpc_resp = fattr,
162 };
163 int status;
164
165 /* Mask out the non-modebit related stuff from attr->ia_mode */
166 sattr->ia_mode &= S_IALLUGO;
167
168 dprintk("NFS call setattr\n");
169 if (sattr->ia_valid & ATTR_FILE)
170 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
171 nfs_fattr_init(fattr);
172 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
173 if (status == 0)
174 nfs_setattr_update_inode(inode, sattr);
175 dprintk("NFS reply setattr: %d\n", status);
176 return status;
177}
178
179static int
180nfs_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
181 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
182{
183 struct nfs_diropargs arg = {
184 .fh = NFS_FH(dir),
185 .name = name->name,
186 .len = name->len
187 };
188 struct nfs_diropok res = {
189 .fh = fhandle,
190 .fattr = fattr
191 };
192 struct rpc_message msg = {
193 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
194 .rpc_argp = &arg,
195 .rpc_resp = &res,
196 };
197 int status;
198
199 dprintk("NFS call lookup %s\n", name->name);
200 nfs_fattr_init(fattr);
201 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
202 dprintk("NFS reply lookup: %d\n", status);
203 return status;
204}
205
206static int nfs_proc_readlink(struct inode *inode, struct page *page,
207 unsigned int pgbase, unsigned int pglen)
208{
209 struct nfs_readlinkargs args = {
210 .fh = NFS_FH(inode),
211 .pgbase = pgbase,
212 .pglen = pglen,
213 .pages = &page
214 };
215 struct rpc_message msg = {
216 .rpc_proc = &nfs_procedures[NFSPROC_READLINK],
217 .rpc_argp = &args,
218 };
219 int status;
220
221 dprintk("NFS call readlink\n");
222 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
223 dprintk("NFS reply readlink: %d\n", status);
224 return status;
225}
226
227struct nfs_createdata {
228 struct nfs_createargs arg;
229 struct nfs_diropok res;
230 struct nfs_fh fhandle;
231 struct nfs_fattr fattr;
232};
233
234static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir,
235 struct dentry *dentry, struct iattr *sattr)
236{
237 struct nfs_createdata *data;
238
239 data = kmalloc(sizeof(*data), GFP_KERNEL);
240
241 if (data != NULL) {
242 data->arg.fh = NFS_FH(dir);
243 data->arg.name = dentry->d_name.name;
244 data->arg.len = dentry->d_name.len;
245 data->arg.sattr = sattr;
246 nfs_fattr_init(&data->fattr);
247 data->fhandle.size = 0;
248 data->res.fh = &data->fhandle;
249 data->res.fattr = &data->fattr;
250 }
251 return data;
252};
253
254static void nfs_free_createdata(const struct nfs_createdata *data)
255{
256 kfree(data);
257}
258
259static int
260nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
261 int flags, struct nfs_open_context *ctx)
262{
263 struct nfs_createdata *data;
264 struct rpc_message msg = {
265 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
266 };
267 int status = -ENOMEM;
268
269 dprintk("NFS call create %s\n", dentry->d_name.name);
270 data = nfs_alloc_createdata(dir, dentry, sattr);
271 if (data == NULL)
272 goto out;
273 msg.rpc_argp = &data->arg;
274 msg.rpc_resp = &data->res;
275 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
276 nfs_mark_for_revalidate(dir);
277 if (status == 0)
278 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
279 nfs_free_createdata(data);
280out:
281 dprintk("NFS reply create: %d\n", status);
282 return status;
283}
284
285/*
286 * In NFSv2, mknod is grafted onto the create call.
287 */
288static int
289nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
290 dev_t rdev)
291{
292 struct nfs_createdata *data;
293 struct rpc_message msg = {
294 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
295 };
296 umode_t mode;
297 int status = -ENOMEM;
298
299 dprintk("NFS call mknod %s\n", dentry->d_name.name);
300
301 mode = sattr->ia_mode;
302 if (S_ISFIFO(mode)) {
303 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
304 sattr->ia_valid &= ~ATTR_SIZE;
305 } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
306 sattr->ia_valid |= ATTR_SIZE;
307 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
308 }
309
310 data = nfs_alloc_createdata(dir, dentry, sattr);
311 if (data == NULL)
312 goto out;
313 msg.rpc_argp = &data->arg;
314 msg.rpc_resp = &data->res;
315
316 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
317 nfs_mark_for_revalidate(dir);
318
319 if (status == -EINVAL && S_ISFIFO(mode)) {
320 sattr->ia_mode = mode;
321 nfs_fattr_init(data->res.fattr);
322 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
323 }
324 if (status == 0)
325 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
326 nfs_free_createdata(data);
327out:
328 dprintk("NFS reply mknod: %d\n", status);
329 return status;
330}
331
332static int
333nfs_proc_remove(struct inode *dir, struct qstr *name)
334{
335 struct nfs_removeargs arg = {
336 .fh = NFS_FH(dir),
337 .name.len = name->len,
338 .name.name = name->name,
339 };
340 struct rpc_message msg = {
341 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
342 .rpc_argp = &arg,
343 };
344 int status;
345
346 dprintk("NFS call remove %s\n", name->name);
347 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
348 nfs_mark_for_revalidate(dir);
349
350 dprintk("NFS reply remove: %d\n", status);
351 return status;
352}
353
354static void
355nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
356{
357 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
358}
359
360static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
361{
362 if (nfs_async_handle_expired_key(task))
363 return 0;
364 nfs_mark_for_revalidate(dir);
365 return 1;
366}
367
368static void
369nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
370{
371 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME];
372}
373
374static int
375nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
376 struct inode *new_dir)
377{
378 if (nfs_async_handle_expired_key(task))
379 return 0;
380 nfs_mark_for_revalidate(old_dir);
381 nfs_mark_for_revalidate(new_dir);
382 return 1;
383}
384
385static int
386nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
387 struct inode *new_dir, struct qstr *new_name)
388{
389 struct nfs_renameargs arg = {
390 .old_dir = NFS_FH(old_dir),
391 .old_name = old_name,
392 .new_dir = NFS_FH(new_dir),
393 .new_name = new_name,
394 };
395 struct rpc_message msg = {
396 .rpc_proc = &nfs_procedures[NFSPROC_RENAME],
397 .rpc_argp = &arg,
398 };
399 int status;
400
401 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
402 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
403 nfs_mark_for_revalidate(old_dir);
404 nfs_mark_for_revalidate(new_dir);
405 dprintk("NFS reply rename: %d\n", status);
406 return status;
407}
408
409static int
410nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
411{
412 struct nfs_linkargs arg = {
413 .fromfh = NFS_FH(inode),
414 .tofh = NFS_FH(dir),
415 .toname = name->name,
416 .tolen = name->len
417 };
418 struct rpc_message msg = {
419 .rpc_proc = &nfs_procedures[NFSPROC_LINK],
420 .rpc_argp = &arg,
421 };
422 int status;
423
424 dprintk("NFS call link %s\n", name->name);
425 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
426 nfs_mark_for_revalidate(inode);
427 nfs_mark_for_revalidate(dir);
428 dprintk("NFS reply link: %d\n", status);
429 return status;
430}
431
432static int
433nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
434 unsigned int len, struct iattr *sattr)
435{
436 struct nfs_fh *fh;
437 struct nfs_fattr *fattr;
438 struct nfs_symlinkargs arg = {
439 .fromfh = NFS_FH(dir),
440 .fromname = dentry->d_name.name,
441 .fromlen = dentry->d_name.len,
442 .pages = &page,
443 .pathlen = len,
444 .sattr = sattr
445 };
446 struct rpc_message msg = {
447 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
448 .rpc_argp = &arg,
449 };
450 int status = -ENAMETOOLONG;
451
452 dprintk("NFS call symlink %s\n", dentry->d_name.name);
453
454 if (len > NFS2_MAXPATHLEN)
455 goto out;
456
457 fh = nfs_alloc_fhandle();
458 fattr = nfs_alloc_fattr();
459 status = -ENOMEM;
460 if (fh == NULL || fattr == NULL)
461 goto out_free;
462
463 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
464 nfs_mark_for_revalidate(dir);
465
466 /*
467 * V2 SYMLINK requests don't return any attributes. Setting the
468 * filehandle size to zero indicates to nfs_instantiate that it
469 * should fill in the data with a LOOKUP call on the wire.
470 */
471 if (status == 0)
472 status = nfs_instantiate(dentry, fh, fattr);
473
474out_free:
475 nfs_free_fattr(fattr);
476 nfs_free_fhandle(fh);
477out:
478 dprintk("NFS reply symlink: %d\n", status);
479 return status;
480}
481
482static int
483nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
484{
485 struct nfs_createdata *data;
486 struct rpc_message msg = {
487 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
488 };
489 int status = -ENOMEM;
490
491 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
492 data = nfs_alloc_createdata(dir, dentry, sattr);
493 if (data == NULL)
494 goto out;
495 msg.rpc_argp = &data->arg;
496 msg.rpc_resp = &data->res;
497
498 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
499 nfs_mark_for_revalidate(dir);
500 if (status == 0)
501 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
502 nfs_free_createdata(data);
503out:
504 dprintk("NFS reply mkdir: %d\n", status);
505 return status;
506}
507
508static int
509nfs_proc_rmdir(struct inode *dir, struct qstr *name)
510{
511 struct nfs_diropargs arg = {
512 .fh = NFS_FH(dir),
513 .name = name->name,
514 .len = name->len
515 };
516 struct rpc_message msg = {
517 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
518 .rpc_argp = &arg,
519 };
520 int status;
521
522 dprintk("NFS call rmdir %s\n", name->name);
523 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
524 nfs_mark_for_revalidate(dir);
525 dprintk("NFS reply rmdir: %d\n", status);
526 return status;
527}
528
529/*
530 * The READDIR implementation is somewhat hackish - we pass a temporary
531 * buffer to the encode function, which installs it in the receive
532 * the receive iovec. The decode function just parses the reply to make
533 * sure it is syntactically correct; the entries itself are decoded
534 * from nfs_readdir by calling the decode_entry function directly.
535 */
536static int
537nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
538 u64 cookie, struct page **pages, unsigned int count, int plus)
539{
540 struct inode *dir = dentry->d_inode;
541 struct nfs_readdirargs arg = {
542 .fh = NFS_FH(dir),
543 .cookie = cookie,
544 .count = count,
545 .pages = pages,
546 };
547 struct rpc_message msg = {
548 .rpc_proc = &nfs_procedures[NFSPROC_READDIR],
549 .rpc_argp = &arg,
550 .rpc_cred = cred,
551 };
552 int status;
553
554 dprintk("NFS call readdir %d\n", (unsigned int)cookie);
555 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
556
557 nfs_invalidate_atime(dir);
558
559 dprintk("NFS reply readdir: %d\n", status);
560 return status;
561}
562
563static int
564nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
565 struct nfs_fsstat *stat)
566{
567 struct nfs2_fsstat fsinfo;
568 struct rpc_message msg = {
569 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
570 .rpc_argp = fhandle,
571 .rpc_resp = &fsinfo,
572 };
573 int status;
574
575 dprintk("NFS call statfs\n");
576 nfs_fattr_init(stat->fattr);
577 status = rpc_call_sync(server->client, &msg, 0);
578 dprintk("NFS reply statfs: %d\n", status);
579 if (status)
580 goto out;
581 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
582 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
583 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
584 stat->tfiles = 0;
585 stat->ffiles = 0;
586 stat->afiles = 0;
587out:
588 return status;
589}
590
591static int
592nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
593 struct nfs_fsinfo *info)
594{
595 struct nfs2_fsstat fsinfo;
596 struct rpc_message msg = {
597 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
598 .rpc_argp = fhandle,
599 .rpc_resp = &fsinfo,
600 };
601 int status;
602
603 dprintk("NFS call fsinfo\n");
604 nfs_fattr_init(info->fattr);
605 status = rpc_call_sync(server->client, &msg, 0);
606 dprintk("NFS reply fsinfo: %d\n", status);
607 if (status)
608 goto out;
609 info->rtmax = NFS_MAXDATA;
610 info->rtpref = fsinfo.tsize;
611 info->rtmult = fsinfo.bsize;
612 info->wtmax = NFS_MAXDATA;
613 info->wtpref = fsinfo.tsize;
614 info->wtmult = fsinfo.bsize;
615 info->dtpref = fsinfo.tsize;
616 info->maxfilesize = 0x7FFFFFFF;
617 info->lease_time = 0;
618out:
619 return status;
620}
621
622static int
623nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
624 struct nfs_pathconf *info)
625{
626 info->max_link = 0;
627 info->max_namelen = NFS2_MAXNAMLEN;
628 return 0;
629}
630
631static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
632{
633 if (nfs_async_handle_expired_key(task))
634 return -EAGAIN;
635
636 nfs_invalidate_atime(data->inode);
637 if (task->tk_status >= 0) {
638 nfs_refresh_inode(data->inode, data->res.fattr);
639 /* Emulate the eof flag, which isn't normally needed in NFSv2
640 * as it is guaranteed to always return the file attributes
641 */
642 if (data->args.offset + data->args.count >= data->res.fattr->size)
643 data->res.eof = 1;
644 }
645 return 0;
646}
647
648static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
649{
650 msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
651}
652
653static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
654{
655 if (nfs_async_handle_expired_key(task))
656 return -EAGAIN;
657
658 if (task->tk_status >= 0)
659 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
660 return 0;
661}
662
663static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
664{
665 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
666 data->args.stable = NFS_FILE_SYNC;
667 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
668}
669
670static void
671nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
672{
673 BUG();
674}
675
676static int
677nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
678{
679 struct inode *inode = filp->f_path.dentry->d_inode;
680
681 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
682}
683
684/* Helper functions for NFS lock bounds checking */
685#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
686static int nfs_lock_check_bounds(const struct file_lock *fl)
687{
688 __s32 start, end;
689
690 start = (__s32)fl->fl_start;
691 if ((loff_t)start != fl->fl_start)
692 goto out_einval;
693
694 if (fl->fl_end != OFFSET_MAX) {
695 end = (__s32)fl->fl_end;
696 if ((loff_t)end != fl->fl_end)
697 goto out_einval;
698 } else
699 end = NFS_LOCK32_OFFSET_MAX;
700
701 if (start < 0 || start > end)
702 goto out_einval;
703 return 0;
704out_einval:
705 return -EINVAL;
706}
707
708const struct nfs_rpc_ops nfs_v2_clientops = {
709 .version = 2, /* protocol version */
710 .dentry_ops = &nfs_dentry_operations,
711 .dir_inode_ops = &nfs_dir_inode_operations,
712 .file_inode_ops = &nfs_file_inode_operations,
713 .getroot = nfs_proc_get_root,
714 .getattr = nfs_proc_getattr,
715 .setattr = nfs_proc_setattr,
716 .lookup = nfs_proc_lookup,
717 .access = NULL, /* access */
718 .readlink = nfs_proc_readlink,
719 .create = nfs_proc_create,
720 .remove = nfs_proc_remove,
721 .unlink_setup = nfs_proc_unlink_setup,
722 .unlink_done = nfs_proc_unlink_done,
723 .rename = nfs_proc_rename,
724 .rename_setup = nfs_proc_rename_setup,
725 .rename_done = nfs_proc_rename_done,
726 .link = nfs_proc_link,
727 .symlink = nfs_proc_symlink,
728 .mkdir = nfs_proc_mkdir,
729 .rmdir = nfs_proc_rmdir,
730 .readdir = nfs_proc_readdir,
731 .mknod = nfs_proc_mknod,
732 .statfs = nfs_proc_statfs,
733 .fsinfo = nfs_proc_fsinfo,
734 .pathconf = nfs_proc_pathconf,
735 .decode_dirent = nfs2_decode_dirent,
736 .read_setup = nfs_proc_read_setup,
737 .read_done = nfs_read_done,
738 .write_setup = nfs_proc_write_setup,
739 .write_done = nfs_write_done,
740 .commit_setup = nfs_proc_commit_setup,
741 .lock = nfs_proc_lock,
742 .lock_check_bounds = nfs_lock_check_bounds,
743 .close_context = nfs_close_context,
744 .init_client = nfs_init_client,
745};
1/*
2 * linux/fs/nfs/proc.c
3 *
4 * Copyright (C) 1992, 1993, 1994 Rick Sladkey
5 *
6 * OS-independent nfs remote procedure call functions
7 *
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
10 * Sun server.
11 *
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.
15 *
16 * Also, the code currently doesn't check the size of the packet, when
17 * it decodes the packet.
18 *
19 * Feel free to fix it and mail me the diffs if it worries you.
20 *
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
24 *
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
27 * incomplete struct).
28 */
29
30#include <linux/types.h>
31#include <linux/param.h>
32#include <linux/time.h>
33#include <linux/mm.h>
34#include <linux/errno.h>
35#include <linux/string.h>
36#include <linux/in.h>
37#include <linux/pagemap.h>
38#include <linux/sunrpc/clnt.h>
39#include <linux/nfs.h>
40#include <linux/nfs2.h>
41#include <linux/nfs_fs.h>
42#include <linux/nfs_page.h>
43#include <linux/lockd/bind.h>
44#include <linux/freezer.h>
45#include "internal.h"
46
47#define NFSDBG_FACILITY NFSDBG_PROC
48
49/*
50 * Bare-bones access to getattr: this is for nfs_read_super.
51 */
52static int
53nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54 struct nfs_fsinfo *info)
55{
56 struct nfs_fattr *fattr = info->fattr;
57 struct nfs2_fsstat fsinfo;
58 struct rpc_message msg = {
59 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
60 .rpc_argp = fhandle,
61 .rpc_resp = fattr,
62 };
63 int status;
64
65 dprintk("%s: call getattr\n", __func__);
66 nfs_fattr_init(fattr);
67 status = rpc_call_sync(server->client, &msg, 0);
68 /* Retry with default authentication if different */
69 if (status && server->nfs_client->cl_rpcclient != server->client)
70 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
71 dprintk("%s: reply getattr: %d\n", __func__, status);
72 if (status)
73 return status;
74 dprintk("%s: call statfs\n", __func__);
75 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
76 msg.rpc_resp = &fsinfo;
77 status = rpc_call_sync(server->client, &msg, 0);
78 /* Retry with default authentication if different */
79 if (status && server->nfs_client->cl_rpcclient != server->client)
80 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
81 dprintk("%s: reply statfs: %d\n", __func__, status);
82 if (status)
83 return status;
84 info->rtmax = NFS_MAXDATA;
85 info->rtpref = fsinfo.tsize;
86 info->rtmult = fsinfo.bsize;
87 info->wtmax = NFS_MAXDATA;
88 info->wtpref = fsinfo.tsize;
89 info->wtmult = fsinfo.bsize;
90 info->dtpref = fsinfo.tsize;
91 info->maxfilesize = 0x7FFFFFFF;
92 info->lease_time = 0;
93 return 0;
94}
95
96/*
97 * One function for each procedure in the NFS protocol.
98 */
99static int
100nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
101 struct nfs_fattr *fattr, struct nfs4_label *label)
102{
103 struct rpc_message msg = {
104 .rpc_proc = &nfs_procedures[NFSPROC_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
117static int
118nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
119 struct iattr *sattr)
120{
121 struct inode *inode = d_inode(dentry);
122 struct nfs_sattrargs arg = {
123 .fh = NFS_FH(inode),
124 .sattr = sattr
125 };
126 struct rpc_message msg = {
127 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR],
128 .rpc_argp = &arg,
129 .rpc_resp = fattr,
130 };
131 int status;
132
133 /* Mask out the non-modebit related stuff from attr->ia_mode */
134 sattr->ia_mode &= S_IALLUGO;
135
136 dprintk("NFS call setattr\n");
137 if (sattr->ia_valid & ATTR_FILE)
138 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
139 nfs_fattr_init(fattr);
140 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
141 if (status == 0)
142 nfs_setattr_update_inode(inode, sattr, fattr);
143 dprintk("NFS reply setattr: %d\n", status);
144 return status;
145}
146
147static int
148nfs_proc_lookup(struct inode *dir, const struct qstr *name,
149 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
150 struct nfs4_label *label)
151{
152 struct nfs_diropargs arg = {
153 .fh = NFS_FH(dir),
154 .name = name->name,
155 .len = name->len
156 };
157 struct nfs_diropok res = {
158 .fh = fhandle,
159 .fattr = fattr
160 };
161 struct rpc_message msg = {
162 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
163 .rpc_argp = &arg,
164 .rpc_resp = &res,
165 };
166 int status;
167
168 dprintk("NFS call lookup %s\n", name->name);
169 nfs_fattr_init(fattr);
170 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
171 dprintk("NFS reply lookup: %d\n", status);
172 return status;
173}
174
175static int nfs_proc_readlink(struct inode *inode, struct page *page,
176 unsigned int pgbase, unsigned int pglen)
177{
178 struct nfs_readlinkargs args = {
179 .fh = NFS_FH(inode),
180 .pgbase = pgbase,
181 .pglen = pglen,
182 .pages = &page
183 };
184 struct rpc_message msg = {
185 .rpc_proc = &nfs_procedures[NFSPROC_READLINK],
186 .rpc_argp = &args,
187 };
188 int status;
189
190 dprintk("NFS call readlink\n");
191 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
192 dprintk("NFS reply readlink: %d\n", status);
193 return status;
194}
195
196struct nfs_createdata {
197 struct nfs_createargs arg;
198 struct nfs_diropok res;
199 struct nfs_fh fhandle;
200 struct nfs_fattr fattr;
201};
202
203static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir,
204 struct dentry *dentry, struct iattr *sattr)
205{
206 struct nfs_createdata *data;
207
208 data = kmalloc(sizeof(*data), GFP_KERNEL);
209
210 if (data != NULL) {
211 data->arg.fh = NFS_FH(dir);
212 data->arg.name = dentry->d_name.name;
213 data->arg.len = dentry->d_name.len;
214 data->arg.sattr = sattr;
215 nfs_fattr_init(&data->fattr);
216 data->fhandle.size = 0;
217 data->res.fh = &data->fhandle;
218 data->res.fattr = &data->fattr;
219 }
220 return data;
221};
222
223static void nfs_free_createdata(const struct nfs_createdata *data)
224{
225 kfree(data);
226}
227
228static int
229nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
230 int flags)
231{
232 struct nfs_createdata *data;
233 struct rpc_message msg = {
234 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
235 };
236 int status = -ENOMEM;
237
238 dprintk("NFS call create %pd\n", dentry);
239 data = nfs_alloc_createdata(dir, dentry, sattr);
240 if (data == NULL)
241 goto out;
242 msg.rpc_argp = &data->arg;
243 msg.rpc_resp = &data->res;
244 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
245 nfs_mark_for_revalidate(dir);
246 if (status == 0)
247 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
248 nfs_free_createdata(data);
249out:
250 dprintk("NFS reply create: %d\n", status);
251 return status;
252}
253
254/*
255 * In NFSv2, mknod is grafted onto the create call.
256 */
257static int
258nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
259 dev_t rdev)
260{
261 struct nfs_createdata *data;
262 struct rpc_message msg = {
263 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
264 };
265 umode_t mode;
266 int status = -ENOMEM;
267
268 dprintk("NFS call mknod %pd\n", dentry);
269
270 mode = sattr->ia_mode;
271 if (S_ISFIFO(mode)) {
272 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
273 sattr->ia_valid &= ~ATTR_SIZE;
274 } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
275 sattr->ia_valid |= ATTR_SIZE;
276 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
277 }
278
279 data = nfs_alloc_createdata(dir, dentry, sattr);
280 if (data == NULL)
281 goto out;
282 msg.rpc_argp = &data->arg;
283 msg.rpc_resp = &data->res;
284
285 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
286 nfs_mark_for_revalidate(dir);
287
288 if (status == -EINVAL && S_ISFIFO(mode)) {
289 sattr->ia_mode = mode;
290 nfs_fattr_init(data->res.fattr);
291 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
292 }
293 if (status == 0)
294 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
295 nfs_free_createdata(data);
296out:
297 dprintk("NFS reply mknod: %d\n", status);
298 return status;
299}
300
301static int
302nfs_proc_remove(struct inode *dir, const struct qstr *name)
303{
304 struct nfs_removeargs arg = {
305 .fh = NFS_FH(dir),
306 .name = *name,
307 };
308 struct rpc_message msg = {
309 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
310 .rpc_argp = &arg,
311 };
312 int status;
313
314 dprintk("NFS call remove %s\n", name->name);
315 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
316 nfs_mark_for_revalidate(dir);
317
318 dprintk("NFS reply remove: %d\n", status);
319 return status;
320}
321
322static void
323nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
324{
325 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
326}
327
328static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
329{
330 rpc_call_start(task);
331}
332
333static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
334{
335 nfs_mark_for_revalidate(dir);
336 return 1;
337}
338
339static void
340nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
341{
342 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME];
343}
344
345static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
346{
347 rpc_call_start(task);
348}
349
350static int
351nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
352 struct inode *new_dir)
353{
354 nfs_mark_for_revalidate(old_dir);
355 nfs_mark_for_revalidate(new_dir);
356 return 1;
357}
358
359static int
360nfs_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
361{
362 struct nfs_linkargs arg = {
363 .fromfh = NFS_FH(inode),
364 .tofh = NFS_FH(dir),
365 .toname = name->name,
366 .tolen = name->len
367 };
368 struct rpc_message msg = {
369 .rpc_proc = &nfs_procedures[NFSPROC_LINK],
370 .rpc_argp = &arg,
371 };
372 int status;
373
374 dprintk("NFS call link %s\n", name->name);
375 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
376 nfs_mark_for_revalidate(inode);
377 nfs_mark_for_revalidate(dir);
378 dprintk("NFS reply link: %d\n", status);
379 return status;
380}
381
382static int
383nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
384 unsigned int len, struct iattr *sattr)
385{
386 struct nfs_fh *fh;
387 struct nfs_fattr *fattr;
388 struct nfs_symlinkargs arg = {
389 .fromfh = NFS_FH(dir),
390 .fromname = dentry->d_name.name,
391 .fromlen = dentry->d_name.len,
392 .pages = &page,
393 .pathlen = len,
394 .sattr = sattr
395 };
396 struct rpc_message msg = {
397 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
398 .rpc_argp = &arg,
399 };
400 int status = -ENAMETOOLONG;
401
402 dprintk("NFS call symlink %pd\n", dentry);
403
404 if (len > NFS2_MAXPATHLEN)
405 goto out;
406
407 fh = nfs_alloc_fhandle();
408 fattr = nfs_alloc_fattr();
409 status = -ENOMEM;
410 if (fh == NULL || fattr == NULL)
411 goto out_free;
412
413 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
414 nfs_mark_for_revalidate(dir);
415
416 /*
417 * V2 SYMLINK requests don't return any attributes. Setting the
418 * filehandle size to zero indicates to nfs_instantiate that it
419 * should fill in the data with a LOOKUP call on the wire.
420 */
421 if (status == 0)
422 status = nfs_instantiate(dentry, fh, fattr, NULL);
423
424out_free:
425 nfs_free_fattr(fattr);
426 nfs_free_fhandle(fh);
427out:
428 dprintk("NFS reply symlink: %d\n", status);
429 return status;
430}
431
432static int
433nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
434{
435 struct nfs_createdata *data;
436 struct rpc_message msg = {
437 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
438 };
439 int status = -ENOMEM;
440
441 dprintk("NFS call mkdir %pd\n", dentry);
442 data = nfs_alloc_createdata(dir, dentry, sattr);
443 if (data == NULL)
444 goto out;
445 msg.rpc_argp = &data->arg;
446 msg.rpc_resp = &data->res;
447
448 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
449 nfs_mark_for_revalidate(dir);
450 if (status == 0)
451 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
452 nfs_free_createdata(data);
453out:
454 dprintk("NFS reply mkdir: %d\n", status);
455 return status;
456}
457
458static int
459nfs_proc_rmdir(struct inode *dir, const struct qstr *name)
460{
461 struct nfs_diropargs arg = {
462 .fh = NFS_FH(dir),
463 .name = name->name,
464 .len = name->len
465 };
466 struct rpc_message msg = {
467 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
468 .rpc_argp = &arg,
469 };
470 int status;
471
472 dprintk("NFS call rmdir %s\n", name->name);
473 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
474 nfs_mark_for_revalidate(dir);
475 dprintk("NFS reply rmdir: %d\n", status);
476 return status;
477}
478
479/*
480 * The READDIR implementation is somewhat hackish - we pass a temporary
481 * buffer to the encode function, which installs it in the receive
482 * the receive iovec. The decode function just parses the reply to make
483 * sure it is syntactically correct; the entries itself are decoded
484 * from nfs_readdir by calling the decode_entry function directly.
485 */
486static int
487nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
488 u64 cookie, struct page **pages, unsigned int count, int plus)
489{
490 struct inode *dir = d_inode(dentry);
491 struct nfs_readdirargs arg = {
492 .fh = NFS_FH(dir),
493 .cookie = cookie,
494 .count = count,
495 .pages = pages,
496 };
497 struct rpc_message msg = {
498 .rpc_proc = &nfs_procedures[NFSPROC_READDIR],
499 .rpc_argp = &arg,
500 .rpc_cred = cred,
501 };
502 int status;
503
504 dprintk("NFS call readdir %d\n", (unsigned int)cookie);
505 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
506
507 nfs_invalidate_atime(dir);
508
509 dprintk("NFS reply readdir: %d\n", status);
510 return status;
511}
512
513static int
514nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
515 struct nfs_fsstat *stat)
516{
517 struct nfs2_fsstat fsinfo;
518 struct rpc_message msg = {
519 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
520 .rpc_argp = fhandle,
521 .rpc_resp = &fsinfo,
522 };
523 int status;
524
525 dprintk("NFS call statfs\n");
526 nfs_fattr_init(stat->fattr);
527 status = rpc_call_sync(server->client, &msg, 0);
528 dprintk("NFS reply statfs: %d\n", status);
529 if (status)
530 goto out;
531 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
532 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
533 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
534 stat->tfiles = 0;
535 stat->ffiles = 0;
536 stat->afiles = 0;
537out:
538 return status;
539}
540
541static int
542nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
543 struct nfs_fsinfo *info)
544{
545 struct nfs2_fsstat fsinfo;
546 struct rpc_message msg = {
547 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
548 .rpc_argp = fhandle,
549 .rpc_resp = &fsinfo,
550 };
551 int status;
552
553 dprintk("NFS call fsinfo\n");
554 nfs_fattr_init(info->fattr);
555 status = rpc_call_sync(server->client, &msg, 0);
556 dprintk("NFS reply fsinfo: %d\n", status);
557 if (status)
558 goto out;
559 info->rtmax = NFS_MAXDATA;
560 info->rtpref = fsinfo.tsize;
561 info->rtmult = fsinfo.bsize;
562 info->wtmax = NFS_MAXDATA;
563 info->wtpref = fsinfo.tsize;
564 info->wtmult = fsinfo.bsize;
565 info->dtpref = fsinfo.tsize;
566 info->maxfilesize = 0x7FFFFFFF;
567 info->lease_time = 0;
568out:
569 return status;
570}
571
572static int
573nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
574 struct nfs_pathconf *info)
575{
576 info->max_link = 0;
577 info->max_namelen = NFS2_MAXNAMLEN;
578 return 0;
579}
580
581static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
582{
583 struct inode *inode = hdr->inode;
584
585 nfs_invalidate_atime(inode);
586 if (task->tk_status >= 0) {
587 nfs_refresh_inode(inode, hdr->res.fattr);
588 /* Emulate the eof flag, which isn't normally needed in NFSv2
589 * as it is guaranteed to always return the file attributes
590 */
591 if (hdr->args.offset + hdr->res.count >= hdr->res.fattr->size)
592 hdr->res.eof = 1;
593 }
594 return 0;
595}
596
597static void nfs_proc_read_setup(struct nfs_pgio_header *hdr,
598 struct rpc_message *msg)
599{
600 msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
601}
602
603static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task,
604 struct nfs_pgio_header *hdr)
605{
606 rpc_call_start(task);
607 return 0;
608}
609
610static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
611{
612 if (task->tk_status >= 0)
613 nfs_writeback_update_inode(hdr);
614 return 0;
615}
616
617static void nfs_proc_write_setup(struct nfs_pgio_header *hdr,
618 struct rpc_message *msg)
619{
620 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
621 hdr->args.stable = NFS_FILE_SYNC;
622 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
623}
624
625static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
626{
627 BUG();
628}
629
630static void
631nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
632{
633 BUG();
634}
635
636static int
637nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
638{
639 struct inode *inode = file_inode(filp);
640
641 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
642}
643
644/* Helper functions for NFS lock bounds checking */
645#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
646static int nfs_lock_check_bounds(const struct file_lock *fl)
647{
648 __s32 start, end;
649
650 start = (__s32)fl->fl_start;
651 if ((loff_t)start != fl->fl_start)
652 goto out_einval;
653
654 if (fl->fl_end != OFFSET_MAX) {
655 end = (__s32)fl->fl_end;
656 if ((loff_t)end != fl->fl_end)
657 goto out_einval;
658 } else
659 end = NFS_LOCK32_OFFSET_MAX;
660
661 if (start < 0 || start > end)
662 goto out_einval;
663 return 0;
664out_einval:
665 return -EINVAL;
666}
667
668static int nfs_have_delegation(struct inode *inode, fmode_t flags)
669{
670 return 0;
671}
672
673static int nfs_return_delegation(struct inode *inode)
674{
675 nfs_wb_all(inode);
676 return 0;
677}
678
679static const struct inode_operations nfs_dir_inode_operations = {
680 .create = nfs_create,
681 .lookup = nfs_lookup,
682 .link = nfs_link,
683 .unlink = nfs_unlink,
684 .symlink = nfs_symlink,
685 .mkdir = nfs_mkdir,
686 .rmdir = nfs_rmdir,
687 .mknod = nfs_mknod,
688 .rename = nfs_rename,
689 .permission = nfs_permission,
690 .getattr = nfs_getattr,
691 .setattr = nfs_setattr,
692};
693
694static const struct inode_operations nfs_file_inode_operations = {
695 .permission = nfs_permission,
696 .getattr = nfs_getattr,
697 .setattr = nfs_setattr,
698};
699
700const struct nfs_rpc_ops nfs_v2_clientops = {
701 .version = 2, /* protocol version */
702 .dentry_ops = &nfs_dentry_operations,
703 .dir_inode_ops = &nfs_dir_inode_operations,
704 .file_inode_ops = &nfs_file_inode_operations,
705 .file_ops = &nfs_file_operations,
706 .getroot = nfs_proc_get_root,
707 .submount = nfs_submount,
708 .try_mount = nfs_try_mount,
709 .getattr = nfs_proc_getattr,
710 .setattr = nfs_proc_setattr,
711 .lookup = nfs_proc_lookup,
712 .access = NULL, /* access */
713 .readlink = nfs_proc_readlink,
714 .create = nfs_proc_create,
715 .remove = nfs_proc_remove,
716 .unlink_setup = nfs_proc_unlink_setup,
717 .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare,
718 .unlink_done = nfs_proc_unlink_done,
719 .rename_setup = nfs_proc_rename_setup,
720 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare,
721 .rename_done = nfs_proc_rename_done,
722 .link = nfs_proc_link,
723 .symlink = nfs_proc_symlink,
724 .mkdir = nfs_proc_mkdir,
725 .rmdir = nfs_proc_rmdir,
726 .readdir = nfs_proc_readdir,
727 .mknod = nfs_proc_mknod,
728 .statfs = nfs_proc_statfs,
729 .fsinfo = nfs_proc_fsinfo,
730 .pathconf = nfs_proc_pathconf,
731 .decode_dirent = nfs2_decode_dirent,
732 .pgio_rpc_prepare = nfs_proc_pgio_rpc_prepare,
733 .read_setup = nfs_proc_read_setup,
734 .read_done = nfs_read_done,
735 .write_setup = nfs_proc_write_setup,
736 .write_done = nfs_write_done,
737 .commit_setup = nfs_proc_commit_setup,
738 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare,
739 .lock = nfs_proc_lock,
740 .lock_check_bounds = nfs_lock_check_bounds,
741 .close_context = nfs_close_context,
742 .have_delegation = nfs_have_delegation,
743 .return_delegation = nfs_return_delegation,
744 .alloc_client = nfs_alloc_client,
745 .init_client = nfs_init_client,
746 .free_client = nfs_free_client,
747 .create_server = nfs_create_server,
748 .clone_server = nfs_clone_server,
749};