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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/nfs/proc.c
4 *
5 * Copyright (C) 1992, 1993, 1994 Rick Sladkey
6 *
7 * OS-independent nfs remote procedure call functions
8 *
9 * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
10 * so at last we can have decent(ish) throughput off a
11 * Sun server.
12 *
13 * Coding optimized and cleaned up by Florian La Roche.
14 * Note: Error returns are optimized for NFS_OK, which isn't translated via
15 * nfs_stat_to_errno(), but happens to be already the right return code.
16 *
17 * Also, the code currently doesn't check the size of the packet, when
18 * it decodes the packet.
19 *
20 * Feel free to fix it and mail me the diffs if it worries you.
21 *
22 * Completely rewritten to support the new RPC call interface;
23 * rewrote and moved the entire XDR stuff to xdr.c
24 * --Olaf Kirch June 1996
25 *
26 * The code below initializes all auto variables explicitly, otherwise
27 * it will fail to work as a module (gcc generates a memset call for an
28 * incomplete struct).
29 */
30
31#include <linux/types.h>
32#include <linux/param.h>
33#include <linux/time.h>
34#include <linux/mm.h>
35#include <linux/errno.h>
36#include <linux/string.h>
37#include <linux/in.h>
38#include <linux/pagemap.h>
39#include <linux/sunrpc/clnt.h>
40#include <linux/nfs.h>
41#include <linux/nfs2.h>
42#include <linux/nfs_fs.h>
43#include <linux/nfs_page.h>
44#include <linux/lockd/bind.h>
45#include <linux/freezer.h>
46#include "internal.h"
47
48#define NFSDBG_FACILITY NFSDBG_PROC
49
50/*
51 * Bare-bones access to getattr: this is for nfs_read_super.
52 */
53static int
54nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
55 struct nfs_fsinfo *info)
56{
57 struct nfs_fattr *fattr = info->fattr;
58 struct nfs2_fsstat fsinfo;
59 struct rpc_message msg = {
60 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
61 .rpc_argp = fhandle,
62 .rpc_resp = fattr,
63 };
64 int status;
65
66 dprintk("%s: call getattr\n", __func__);
67 nfs_fattr_init(fattr);
68 status = rpc_call_sync(server->client, &msg, 0);
69 /* Retry with default authentication if different */
70 if (status && server->nfs_client->cl_rpcclient != server->client)
71 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
72 dprintk("%s: reply getattr: %d\n", __func__, status);
73 if (status)
74 return status;
75 dprintk("%s: call statfs\n", __func__);
76 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
77 msg.rpc_resp = &fsinfo;
78 status = rpc_call_sync(server->client, &msg, 0);
79 /* Retry with default authentication if different */
80 if (status && server->nfs_client->cl_rpcclient != server->client)
81 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
82 dprintk("%s: reply statfs: %d\n", __func__, status);
83 if (status)
84 return status;
85 info->rtmax = NFS_MAXDATA;
86 info->rtpref = fsinfo.tsize;
87 info->rtmult = fsinfo.bsize;
88 info->wtmax = NFS_MAXDATA;
89 info->wtpref = fsinfo.tsize;
90 info->wtmult = fsinfo.bsize;
91 info->dtpref = fsinfo.tsize;
92 info->maxfilesize = 0x7FFFFFFF;
93 info->lease_time = 0;
94 return 0;
95}
96
97/*
98 * One function for each procedure in the NFS protocol.
99 */
100static int
101nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
102 struct nfs_fattr *fattr, struct nfs4_label *label)
103{
104 struct rpc_message msg = {
105 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
106 .rpc_argp = fhandle,
107 .rpc_resp = fattr,
108 };
109 int status;
110
111 dprintk("NFS call getattr\n");
112 nfs_fattr_init(fattr);
113 status = rpc_call_sync(server->client, &msg, 0);
114 dprintk("NFS reply getattr: %d\n", status);
115 return status;
116}
117
118static int
119nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
120 struct iattr *sattr)
121{
122 struct inode *inode = d_inode(dentry);
123 struct nfs_sattrargs arg = {
124 .fh = NFS_FH(inode),
125 .sattr = sattr
126 };
127 struct rpc_message msg = {
128 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR],
129 .rpc_argp = &arg,
130 .rpc_resp = fattr,
131 };
132 int status;
133
134 /* Mask out the non-modebit related stuff from attr->ia_mode */
135 sattr->ia_mode &= S_IALLUGO;
136
137 dprintk("NFS call setattr\n");
138 if (sattr->ia_valid & ATTR_FILE)
139 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
140 nfs_fattr_init(fattr);
141 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
142 if (status == 0)
143 nfs_setattr_update_inode(inode, sattr, fattr);
144 dprintk("NFS reply setattr: %d\n", status);
145 return status;
146}
147
148static int
149nfs_proc_lookup(struct inode *dir, const struct qstr *name,
150 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
151 struct nfs4_label *label)
152{
153 struct nfs_diropargs arg = {
154 .fh = NFS_FH(dir),
155 .name = name->name,
156 .len = name->len
157 };
158 struct nfs_diropok res = {
159 .fh = fhandle,
160 .fattr = fattr
161 };
162 struct rpc_message msg = {
163 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
164 .rpc_argp = &arg,
165 .rpc_resp = &res,
166 };
167 int status;
168
169 dprintk("NFS call lookup %s\n", name->name);
170 nfs_fattr_init(fattr);
171 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
172 dprintk("NFS reply lookup: %d\n", status);
173 return status;
174}
175
176static int nfs_proc_readlink(struct inode *inode, struct page *page,
177 unsigned int pgbase, unsigned int pglen)
178{
179 struct nfs_readlinkargs args = {
180 .fh = NFS_FH(inode),
181 .pgbase = pgbase,
182 .pglen = pglen,
183 .pages = &page
184 };
185 struct rpc_message msg = {
186 .rpc_proc = &nfs_procedures[NFSPROC_READLINK],
187 .rpc_argp = &args,
188 };
189 int status;
190
191 dprintk("NFS call readlink\n");
192 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
193 dprintk("NFS reply readlink: %d\n", status);
194 return status;
195}
196
197struct nfs_createdata {
198 struct nfs_createargs arg;
199 struct nfs_diropok res;
200 struct nfs_fh fhandle;
201 struct nfs_fattr fattr;
202};
203
204static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir,
205 struct dentry *dentry, struct iattr *sattr)
206{
207 struct nfs_createdata *data;
208
209 data = kmalloc(sizeof(*data), GFP_KERNEL);
210
211 if (data != NULL) {
212 data->arg.fh = NFS_FH(dir);
213 data->arg.name = dentry->d_name.name;
214 data->arg.len = dentry->d_name.len;
215 data->arg.sattr = sattr;
216 nfs_fattr_init(&data->fattr);
217 data->fhandle.size = 0;
218 data->res.fh = &data->fhandle;
219 data->res.fattr = &data->fattr;
220 }
221 return data;
222};
223
224static void nfs_free_createdata(const struct nfs_createdata *data)
225{
226 kfree(data);
227}
228
229static int
230nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
231 int flags)
232{
233 struct nfs_createdata *data;
234 struct rpc_message msg = {
235 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
236 };
237 int status = -ENOMEM;
238
239 dprintk("NFS call create %pd\n", dentry);
240 data = nfs_alloc_createdata(dir, dentry, sattr);
241 if (data == NULL)
242 goto out;
243 msg.rpc_argp = &data->arg;
244 msg.rpc_resp = &data->res;
245 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
246 nfs_mark_for_revalidate(dir);
247 if (status == 0)
248 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
249 nfs_free_createdata(data);
250out:
251 dprintk("NFS reply create: %d\n", status);
252 return status;
253}
254
255/*
256 * In NFSv2, mknod is grafted onto the create call.
257 */
258static int
259nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
260 dev_t rdev)
261{
262 struct nfs_createdata *data;
263 struct rpc_message msg = {
264 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
265 };
266 umode_t mode;
267 int status = -ENOMEM;
268
269 dprintk("NFS call mknod %pd\n", dentry);
270
271 mode = sattr->ia_mode;
272 if (S_ISFIFO(mode)) {
273 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
274 sattr->ia_valid &= ~ATTR_SIZE;
275 } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
276 sattr->ia_valid |= ATTR_SIZE;
277 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
278 }
279
280 data = nfs_alloc_createdata(dir, dentry, sattr);
281 if (data == NULL)
282 goto out;
283 msg.rpc_argp = &data->arg;
284 msg.rpc_resp = &data->res;
285
286 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
287 nfs_mark_for_revalidate(dir);
288
289 if (status == -EINVAL && S_ISFIFO(mode)) {
290 sattr->ia_mode = mode;
291 nfs_fattr_init(data->res.fattr);
292 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
293 }
294 if (status == 0)
295 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
296 nfs_free_createdata(data);
297out:
298 dprintk("NFS reply mknod: %d\n", status);
299 return status;
300}
301
302static int
303nfs_proc_remove(struct inode *dir, struct dentry *dentry)
304{
305 struct nfs_removeargs arg = {
306 .fh = NFS_FH(dir),
307 .name = dentry->d_name,
308 };
309 struct rpc_message msg = {
310 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
311 .rpc_argp = &arg,
312 };
313 int status;
314
315 dprintk("NFS call remove %pd2\n",dentry);
316 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
317 nfs_mark_for_revalidate(dir);
318
319 dprintk("NFS reply remove: %d\n", status);
320 return status;
321}
322
323static void
324nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dentry)
325{
326 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
327}
328
329static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
330{
331 rpc_call_start(task);
332}
333
334static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
335{
336 nfs_mark_for_revalidate(dir);
337 return 1;
338}
339
340static void
341nfs_proc_rename_setup(struct rpc_message *msg,
342 struct dentry *old_dentry,
343 struct dentry *new_dentry)
344{
345 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME];
346}
347
348static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
349{
350 rpc_call_start(task);
351}
352
353static int
354nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
355 struct inode *new_dir)
356{
357 nfs_mark_for_revalidate(old_dir);
358 nfs_mark_for_revalidate(new_dir);
359 return 1;
360}
361
362static int
363nfs_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
364{
365 struct nfs_linkargs arg = {
366 .fromfh = NFS_FH(inode),
367 .tofh = NFS_FH(dir),
368 .toname = name->name,
369 .tolen = name->len
370 };
371 struct rpc_message msg = {
372 .rpc_proc = &nfs_procedures[NFSPROC_LINK],
373 .rpc_argp = &arg,
374 };
375 int status;
376
377 dprintk("NFS call link %s\n", name->name);
378 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
379 nfs_mark_for_revalidate(inode);
380 nfs_mark_for_revalidate(dir);
381 dprintk("NFS reply link: %d\n", status);
382 return status;
383}
384
385static int
386nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
387 unsigned int len, struct iattr *sattr)
388{
389 struct nfs_fh *fh;
390 struct nfs_fattr *fattr;
391 struct nfs_symlinkargs arg = {
392 .fromfh = NFS_FH(dir),
393 .fromname = dentry->d_name.name,
394 .fromlen = dentry->d_name.len,
395 .pages = &page,
396 .pathlen = len,
397 .sattr = sattr
398 };
399 struct rpc_message msg = {
400 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
401 .rpc_argp = &arg,
402 };
403 int status = -ENAMETOOLONG;
404
405 dprintk("NFS call symlink %pd\n", dentry);
406
407 if (len > NFS2_MAXPATHLEN)
408 goto out;
409
410 fh = nfs_alloc_fhandle();
411 fattr = nfs_alloc_fattr();
412 status = -ENOMEM;
413 if (fh == NULL || fattr == NULL)
414 goto out_free;
415
416 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
417 nfs_mark_for_revalidate(dir);
418
419 /*
420 * V2 SYMLINK requests don't return any attributes. Setting the
421 * filehandle size to zero indicates to nfs_instantiate that it
422 * should fill in the data with a LOOKUP call on the wire.
423 */
424 if (status == 0)
425 status = nfs_instantiate(dentry, fh, fattr, NULL);
426
427out_free:
428 nfs_free_fattr(fattr);
429 nfs_free_fhandle(fh);
430out:
431 dprintk("NFS reply symlink: %d\n", status);
432 return status;
433}
434
435static int
436nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
437{
438 struct nfs_createdata *data;
439 struct rpc_message msg = {
440 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
441 };
442 int status = -ENOMEM;
443
444 dprintk("NFS call mkdir %pd\n", dentry);
445 data = nfs_alloc_createdata(dir, dentry, sattr);
446 if (data == NULL)
447 goto out;
448 msg.rpc_argp = &data->arg;
449 msg.rpc_resp = &data->res;
450
451 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
452 nfs_mark_for_revalidate(dir);
453 if (status == 0)
454 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
455 nfs_free_createdata(data);
456out:
457 dprintk("NFS reply mkdir: %d\n", status);
458 return status;
459}
460
461static int
462nfs_proc_rmdir(struct inode *dir, const struct qstr *name)
463{
464 struct nfs_diropargs arg = {
465 .fh = NFS_FH(dir),
466 .name = name->name,
467 .len = name->len
468 };
469 struct rpc_message msg = {
470 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
471 .rpc_argp = &arg,
472 };
473 int status;
474
475 dprintk("NFS call rmdir %s\n", name->name);
476 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
477 nfs_mark_for_revalidate(dir);
478 dprintk("NFS reply rmdir: %d\n", status);
479 return status;
480}
481
482/*
483 * The READDIR implementation is somewhat hackish - we pass a temporary
484 * buffer to the encode function, which installs it in the receive
485 * the receive iovec. The decode function just parses the reply to make
486 * sure it is syntactically correct; the entries itself are decoded
487 * from nfs_readdir by calling the decode_entry function directly.
488 */
489static int
490nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
491 u64 cookie, struct page **pages, unsigned int count, bool plus)
492{
493 struct inode *dir = d_inode(dentry);
494 struct nfs_readdirargs arg = {
495 .fh = NFS_FH(dir),
496 .cookie = cookie,
497 .count = count,
498 .pages = pages,
499 };
500 struct rpc_message msg = {
501 .rpc_proc = &nfs_procedures[NFSPROC_READDIR],
502 .rpc_argp = &arg,
503 .rpc_cred = cred,
504 };
505 int status;
506
507 dprintk("NFS call readdir %d\n", (unsigned int)cookie);
508 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
509
510 nfs_invalidate_atime(dir);
511
512 dprintk("NFS reply readdir: %d\n", status);
513 return status;
514}
515
516static int
517nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
518 struct nfs_fsstat *stat)
519{
520 struct nfs2_fsstat fsinfo;
521 struct rpc_message msg = {
522 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
523 .rpc_argp = fhandle,
524 .rpc_resp = &fsinfo,
525 };
526 int status;
527
528 dprintk("NFS call statfs\n");
529 nfs_fattr_init(stat->fattr);
530 status = rpc_call_sync(server->client, &msg, 0);
531 dprintk("NFS reply statfs: %d\n", status);
532 if (status)
533 goto out;
534 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
535 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
536 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
537 stat->tfiles = 0;
538 stat->ffiles = 0;
539 stat->afiles = 0;
540out:
541 return status;
542}
543
544static int
545nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
546 struct nfs_fsinfo *info)
547{
548 struct nfs2_fsstat fsinfo;
549 struct rpc_message msg = {
550 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
551 .rpc_argp = fhandle,
552 .rpc_resp = &fsinfo,
553 };
554 int status;
555
556 dprintk("NFS call fsinfo\n");
557 nfs_fattr_init(info->fattr);
558 status = rpc_call_sync(server->client, &msg, 0);
559 dprintk("NFS reply fsinfo: %d\n", status);
560 if (status)
561 goto out;
562 info->rtmax = NFS_MAXDATA;
563 info->rtpref = fsinfo.tsize;
564 info->rtmult = fsinfo.bsize;
565 info->wtmax = NFS_MAXDATA;
566 info->wtpref = fsinfo.tsize;
567 info->wtmult = fsinfo.bsize;
568 info->dtpref = fsinfo.tsize;
569 info->maxfilesize = 0x7FFFFFFF;
570 info->lease_time = 0;
571out:
572 return status;
573}
574
575static int
576nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
577 struct nfs_pathconf *info)
578{
579 info->max_link = 0;
580 info->max_namelen = NFS2_MAXNAMLEN;
581 return 0;
582}
583
584static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
585{
586 struct inode *inode = hdr->inode;
587
588 nfs_invalidate_atime(inode);
589 if (task->tk_status >= 0) {
590 nfs_refresh_inode(inode, hdr->res.fattr);
591 /* Emulate the eof flag, which isn't normally needed in NFSv2
592 * as it is guaranteed to always return the file attributes
593 */
594 if (hdr->args.offset + hdr->res.count >= hdr->res.fattr->size)
595 hdr->res.eof = 1;
596 }
597 return 0;
598}
599
600static void nfs_proc_read_setup(struct nfs_pgio_header *hdr,
601 struct rpc_message *msg)
602{
603 msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
604}
605
606static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task,
607 struct nfs_pgio_header *hdr)
608{
609 rpc_call_start(task);
610 return 0;
611}
612
613static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
614{
615 if (task->tk_status >= 0)
616 nfs_writeback_update_inode(hdr);
617 return 0;
618}
619
620static void nfs_proc_write_setup(struct nfs_pgio_header *hdr,
621 struct rpc_message *msg)
622{
623 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
624 hdr->args.stable = NFS_FILE_SYNC;
625 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
626}
627
628static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
629{
630 BUG();
631}
632
633static void
634nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
635{
636 BUG();
637}
638
639static int
640nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
641{
642 struct inode *inode = file_inode(filp);
643
644 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, NULL);
645}
646
647/* Helper functions for NFS lock bounds checking */
648#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
649static int nfs_lock_check_bounds(const struct file_lock *fl)
650{
651 __s32 start, end;
652
653 start = (__s32)fl->fl_start;
654 if ((loff_t)start != fl->fl_start)
655 goto out_einval;
656
657 if (fl->fl_end != OFFSET_MAX) {
658 end = (__s32)fl->fl_end;
659 if ((loff_t)end != fl->fl_end)
660 goto out_einval;
661 } else
662 end = NFS_LOCK32_OFFSET_MAX;
663
664 if (start < 0 || start > end)
665 goto out_einval;
666 return 0;
667out_einval:
668 return -EINVAL;
669}
670
671static int nfs_have_delegation(struct inode *inode, fmode_t flags)
672{
673 return 0;
674}
675
676static const struct inode_operations nfs_dir_inode_operations = {
677 .create = nfs_create,
678 .lookup = nfs_lookup,
679 .link = nfs_link,
680 .unlink = nfs_unlink,
681 .symlink = nfs_symlink,
682 .mkdir = nfs_mkdir,
683 .rmdir = nfs_rmdir,
684 .mknod = nfs_mknod,
685 .rename = nfs_rename,
686 .permission = nfs_permission,
687 .getattr = nfs_getattr,
688 .setattr = nfs_setattr,
689};
690
691static const struct inode_operations nfs_file_inode_operations = {
692 .permission = nfs_permission,
693 .getattr = nfs_getattr,
694 .setattr = nfs_setattr,
695};
696
697const struct nfs_rpc_ops nfs_v2_clientops = {
698 .version = 2, /* protocol version */
699 .dentry_ops = &nfs_dentry_operations,
700 .dir_inode_ops = &nfs_dir_inode_operations,
701 .file_inode_ops = &nfs_file_inode_operations,
702 .file_ops = &nfs_file_operations,
703 .getroot = nfs_proc_get_root,
704 .submount = nfs_submount,
705 .try_mount = nfs_try_mount,
706 .getattr = nfs_proc_getattr,
707 .setattr = nfs_proc_setattr,
708 .lookup = nfs_proc_lookup,
709 .access = NULL, /* access */
710 .readlink = nfs_proc_readlink,
711 .create = nfs_proc_create,
712 .remove = nfs_proc_remove,
713 .unlink_setup = nfs_proc_unlink_setup,
714 .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare,
715 .unlink_done = nfs_proc_unlink_done,
716 .rename_setup = nfs_proc_rename_setup,
717 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare,
718 .rename_done = nfs_proc_rename_done,
719 .link = nfs_proc_link,
720 .symlink = nfs_proc_symlink,
721 .mkdir = nfs_proc_mkdir,
722 .rmdir = nfs_proc_rmdir,
723 .readdir = nfs_proc_readdir,
724 .mknod = nfs_proc_mknod,
725 .statfs = nfs_proc_statfs,
726 .fsinfo = nfs_proc_fsinfo,
727 .pathconf = nfs_proc_pathconf,
728 .decode_dirent = nfs2_decode_dirent,
729 .pgio_rpc_prepare = nfs_proc_pgio_rpc_prepare,
730 .read_setup = nfs_proc_read_setup,
731 .read_done = nfs_read_done,
732 .write_setup = nfs_proc_write_setup,
733 .write_done = nfs_write_done,
734 .commit_setup = nfs_proc_commit_setup,
735 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare,
736 .lock = nfs_proc_lock,
737 .lock_check_bounds = nfs_lock_check_bounds,
738 .close_context = nfs_close_context,
739 .have_delegation = nfs_have_delegation,
740 .alloc_client = nfs_alloc_client,
741 .init_client = nfs_init_client,
742 .free_client = nfs_free_client,
743 .create_server = nfs_create_server,
744 .clone_server = nfs_clone_server,
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 = dentry->d_inode;
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);
143 dprintk("NFS reply setattr: %d\n", status);
144 return status;
145}
146
147static int
148nfs_proc_lookup(struct inode *dir, 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, 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, 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, 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 = dentry->d_inode;
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_read_data *data)
582{
583 struct inode *inode = data->header->inode;
584
585 nfs_invalidate_atime(inode);
586 if (task->tk_status >= 0) {
587 nfs_refresh_inode(inode, data->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 (data->args.offset + data->res.count >= data->res.fattr->size)
592 data->res.eof = 1;
593 }
594 return 0;
595}
596
597static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
598{
599 msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
600}
601
602static int nfs_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
603{
604 rpc_call_start(task);
605 return 0;
606}
607
608static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
609{
610 struct inode *inode = data->header->inode;
611
612 if (task->tk_status >= 0)
613 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
614 return 0;
615}
616
617static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
618{
619 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
620 data->args.stable = NFS_FILE_SYNC;
621 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
622}
623
624static int nfs_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
625{
626 rpc_call_start(task);
627 return 0;
628}
629
630static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
631{
632 BUG();
633}
634
635static void
636nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
637{
638 BUG();
639}
640
641static int
642nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
643{
644 struct inode *inode = file_inode(filp);
645
646 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
647}
648
649/* Helper functions for NFS lock bounds checking */
650#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
651static int nfs_lock_check_bounds(const struct file_lock *fl)
652{
653 __s32 start, end;
654
655 start = (__s32)fl->fl_start;
656 if ((loff_t)start != fl->fl_start)
657 goto out_einval;
658
659 if (fl->fl_end != OFFSET_MAX) {
660 end = (__s32)fl->fl_end;
661 if ((loff_t)end != fl->fl_end)
662 goto out_einval;
663 } else
664 end = NFS_LOCK32_OFFSET_MAX;
665
666 if (start < 0 || start > end)
667 goto out_einval;
668 return 0;
669out_einval:
670 return -EINVAL;
671}
672
673static int nfs_have_delegation(struct inode *inode, fmode_t flags)
674{
675 return 0;
676}
677
678static int nfs_return_delegation(struct inode *inode)
679{
680 nfs_wb_all(inode);
681 return 0;
682}
683
684static const struct inode_operations nfs_dir_inode_operations = {
685 .create = nfs_create,
686 .lookup = nfs_lookup,
687 .link = nfs_link,
688 .unlink = nfs_unlink,
689 .symlink = nfs_symlink,
690 .mkdir = nfs_mkdir,
691 .rmdir = nfs_rmdir,
692 .mknod = nfs_mknod,
693 .rename = nfs_rename,
694 .permission = nfs_permission,
695 .getattr = nfs_getattr,
696 .setattr = nfs_setattr,
697};
698
699static const struct inode_operations nfs_file_inode_operations = {
700 .permission = nfs_permission,
701 .getattr = nfs_getattr,
702 .setattr = nfs_setattr,
703};
704
705const struct nfs_rpc_ops nfs_v2_clientops = {
706 .version = 2, /* protocol version */
707 .dentry_ops = &nfs_dentry_operations,
708 .dir_inode_ops = &nfs_dir_inode_operations,
709 .file_inode_ops = &nfs_file_inode_operations,
710 .file_ops = &nfs_file_operations,
711 .getroot = nfs_proc_get_root,
712 .submount = nfs_submount,
713 .try_mount = nfs_try_mount,
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_rpc_prepare = nfs_proc_unlink_rpc_prepare,
723 .unlink_done = nfs_proc_unlink_done,
724 .rename_setup = nfs_proc_rename_setup,
725 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare,
726 .rename_done = nfs_proc_rename_done,
727 .link = nfs_proc_link,
728 .symlink = nfs_proc_symlink,
729 .mkdir = nfs_proc_mkdir,
730 .rmdir = nfs_proc_rmdir,
731 .readdir = nfs_proc_readdir,
732 .mknod = nfs_proc_mknod,
733 .statfs = nfs_proc_statfs,
734 .fsinfo = nfs_proc_fsinfo,
735 .pathconf = nfs_proc_pathconf,
736 .decode_dirent = nfs2_decode_dirent,
737 .read_setup = nfs_proc_read_setup,
738 .read_pageio_init = nfs_pageio_init_read,
739 .read_rpc_prepare = nfs_proc_read_rpc_prepare,
740 .read_done = nfs_read_done,
741 .write_setup = nfs_proc_write_setup,
742 .write_pageio_init = nfs_pageio_init_write,
743 .write_rpc_prepare = nfs_proc_write_rpc_prepare,
744 .write_done = nfs_write_done,
745 .commit_setup = nfs_proc_commit_setup,
746 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare,
747 .lock = nfs_proc_lock,
748 .lock_check_bounds = nfs_lock_check_bounds,
749 .close_context = nfs_close_context,
750 .have_delegation = nfs_have_delegation,
751 .return_delegation = nfs_return_delegation,
752 .alloc_client = nfs_alloc_client,
753 .init_client = nfs_init_client,
754 .free_client = nfs_free_client,
755 .create_server = nfs_create_server,
756 .clone_server = nfs_clone_server,
757};