1
2
3
4
5#include <linux/fs.h>
6#include <linux/sunrpc/addr.h>
7#include <linux/sunrpc/sched.h>
8#include <linux/nfs.h>
9#include <linux/nfs3.h>
10#include <linux/nfs4.h>
11#include <linux/nfs_xdr.h>
12#include <linux/nfs_fs.h>
13#include "nfs4_fs.h"
14#include "nfs42.h"
15#include "iostat.h"
16#include "pnfs.h"
17#include "nfs4session.h"
18#include "internal.h"
19#include "delegation.h"
20#include "nfs4trace.h"
21
22#define NFSDBG_FACILITY NFSDBG_PROC
23static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
24
25static void nfs42_set_netaddr(struct file *filep, struct nfs42_netaddr *naddr)
26{
27 struct nfs_client *clp = (NFS_SERVER(file_inode(filep)))->nfs_client;
28 unsigned short port = 2049;
29
30 rcu_read_lock();
31 naddr->netid_len = scnprintf(naddr->netid,
32 sizeof(naddr->netid), "%s",
33 rpc_peeraddr2str(clp->cl_rpcclient,
34 RPC_DISPLAY_NETID));
35 naddr->addr_len = scnprintf(naddr->addr,
36 sizeof(naddr->addr),
37 "%s.%u.%u",
38 rpc_peeraddr2str(clp->cl_rpcclient,
39 RPC_DISPLAY_ADDR),
40 port >> 8, port & 255);
41 rcu_read_unlock();
42}
43
44static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
45 struct nfs_lock_context *lock, loff_t offset, loff_t len)
46{
47 struct inode *inode = file_inode(filep);
48 struct nfs_server *server = NFS_SERVER(inode);
49 struct nfs42_falloc_args args = {
50 .falloc_fh = NFS_FH(inode),
51 .falloc_offset = offset,
52 .falloc_length = len,
53 .falloc_bitmask = nfs4_fattr_bitmap,
54 };
55 struct nfs42_falloc_res res = {
56 .falloc_server = server,
57 };
58 int status;
59
60 msg->rpc_argp = &args;
61 msg->rpc_resp = &res;
62
63 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
64 lock, FMODE_WRITE);
65 if (status) {
66 if (status == -EAGAIN)
67 status = -NFS4ERR_BAD_STATEID;
68 return status;
69 }
70
71 res.falloc_fattr = nfs_alloc_fattr();
72 if (!res.falloc_fattr)
73 return -ENOMEM;
74
75 status = nfs4_call_sync(server->client, server, msg,
76 &args.seq_args, &res.seq_res, 0);
77 if (status == 0)
78 status = nfs_post_op_update_inode(inode, res.falloc_fattr);
79
80 kfree(res.falloc_fattr);
81 return status;
82}
83
84static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
85 loff_t offset, loff_t len)
86{
87 struct nfs_server *server = NFS_SERVER(file_inode(filep));
88 struct nfs4_exception exception = { };
89 struct nfs_lock_context *lock;
90 int err;
91
92 lock = nfs_get_lock_context(nfs_file_open_context(filep));
93 if (IS_ERR(lock))
94 return PTR_ERR(lock);
95
96 exception.inode = file_inode(filep);
97 exception.state = lock->open_context->state;
98
99 do {
100 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
101 if (err == -ENOTSUPP) {
102 err = -EOPNOTSUPP;
103 break;
104 }
105 err = nfs4_handle_exception(server, err, &exception);
106 } while (exception.retry);
107
108 nfs_put_lock_context(lock);
109 return err;
110}
111
112int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
113{
114 struct rpc_message msg = {
115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
116 };
117 struct inode *inode = file_inode(filep);
118 int err;
119
120 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
121 return -EOPNOTSUPP;
122
123 inode_lock(inode);
124
125 err = nfs42_proc_fallocate(&msg, filep, offset, len);
126 if (err == -EOPNOTSUPP)
127 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
128
129 inode_unlock(inode);
130 return err;
131}
132
133int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
134{
135 struct rpc_message msg = {
136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
137 };
138 struct inode *inode = file_inode(filep);
139 int err;
140
141 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
142 return -EOPNOTSUPP;
143
144 inode_lock(inode);
145 err = nfs_sync_inode(inode);
146 if (err)
147 goto out_unlock;
148
149 err = nfs42_proc_fallocate(&msg, filep, offset, len);
150 if (err == 0)
151 truncate_pagecache_range(inode, offset, (offset + len) -1);
152 if (err == -EOPNOTSUPP)
153 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
154out_unlock:
155 inode_unlock(inode);
156 return err;
157}
158
159static int handle_async_copy(struct nfs42_copy_res *res,
160 struct nfs_server *dst_server,
161 struct nfs_server *src_server,
162 struct file *src,
163 struct file *dst,
164 nfs4_stateid *src_stateid,
165 bool *restart)
166{
167 struct nfs4_copy_state *copy, *tmp_copy;
168 int status = NFS4_OK;
169 bool found_pending = false;
170 struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
171 struct nfs_open_context *src_ctx = nfs_file_open_context(src);
172
173 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
174 if (!copy)
175 return -ENOMEM;
176
177 spin_lock(&dst_server->nfs_client->cl_lock);
178 list_for_each_entry(tmp_copy,
179 &dst_server->nfs_client->pending_cb_stateids,
180 copies) {
181 if (memcmp(&res->write_res.stateid, &tmp_copy->stateid,
182 NFS4_STATEID_SIZE))
183 continue;
184 found_pending = true;
185 list_del(&tmp_copy->copies);
186 break;
187 }
188 if (found_pending) {
189 spin_unlock(&dst_server->nfs_client->cl_lock);
190 kfree(copy);
191 copy = tmp_copy;
192 goto out;
193 }
194
195 memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
196 init_completion(©->completion);
197 copy->parent_dst_state = dst_ctx->state;
198 copy->parent_src_state = src_ctx->state;
199
200 list_add_tail(©->copies, &dst_server->ss_copies);
201 spin_unlock(&dst_server->nfs_client->cl_lock);
202
203 if (dst_server != src_server) {
204 spin_lock(&src_server->nfs_client->cl_lock);
205 list_add_tail(©->src_copies, &src_server->ss_copies);
206 spin_unlock(&src_server->nfs_client->cl_lock);
207 }
208
209 status = wait_for_completion_interruptible(©->completion);
210 spin_lock(&dst_server->nfs_client->cl_lock);
211 list_del_init(©->copies);
212 spin_unlock(&dst_server->nfs_client->cl_lock);
213 if (dst_server != src_server) {
214 spin_lock(&src_server->nfs_client->cl_lock);
215 list_del_init(©->src_copies);
216 spin_unlock(&src_server->nfs_client->cl_lock);
217 }
218 if (status == -ERESTARTSYS) {
219 goto out_cancel;
220 } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
221 status = -EAGAIN;
222 *restart = true;
223 goto out_cancel;
224 }
225out:
226 res->write_res.count = copy->count;
227 memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
228 status = -copy->error;
229
230out_free:
231 kfree(copy);
232 return status;
233out_cancel:
234 nfs42_do_offload_cancel_async(dst, ©->stateid);
235 if (!nfs42_files_from_same_server(src, dst))
236 nfs42_do_offload_cancel_async(src, src_stateid);
237 goto out_free;
238}
239
240static int process_copy_commit(struct file *dst, loff_t pos_dst,
241 struct nfs42_copy_res *res)
242{
243 struct nfs_commitres cres;
244 int status = -ENOMEM;
245
246 cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
247 if (!cres.verf)
248 goto out;
249
250 status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
251 if (status)
252 goto out_free;
253 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
254 &cres.verf->verifier)) {
255 dprintk("commit verf differs from copy verf\n");
256 status = -EAGAIN;
257 }
258out_free:
259 kfree(cres.verf);
260out:
261 return status;
262}
263
264static ssize_t _nfs42_proc_copy(struct file *src,
265 struct nfs_lock_context *src_lock,
266 struct file *dst,
267 struct nfs_lock_context *dst_lock,
268 struct nfs42_copy_args *args,
269 struct nfs42_copy_res *res,
270 struct nl4_server *nss,
271 nfs4_stateid *cnr_stateid,
272 bool *restart)
273{
274 struct rpc_message msg = {
275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
276 .rpc_argp = args,
277 .rpc_resp = res,
278 };
279 struct inode *dst_inode = file_inode(dst);
280 struct inode *src_inode = file_inode(src);
281 struct nfs_server *dst_server = NFS_SERVER(dst_inode);
282 struct nfs_server *src_server = NFS_SERVER(src_inode);
283 loff_t pos_src = args->src_pos;
284 loff_t pos_dst = args->dst_pos;
285 size_t count = args->count;
286 ssize_t status;
287
288 if (nss) {
289 args->cp_src = nss;
290 nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
291 } else {
292 status = nfs4_set_rw_stateid(&args->src_stateid,
293 src_lock->open_context, src_lock, FMODE_READ);
294 if (status) {
295 if (status == -EAGAIN)
296 status = -NFS4ERR_BAD_STATEID;
297 return status;
298 }
299 }
300 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
301 pos_src, pos_src + (loff_t)count - 1);
302 if (status)
303 return status;
304
305 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
306 dst_lock, FMODE_WRITE);
307 if (status) {
308 if (status == -EAGAIN)
309 status = -NFS4ERR_BAD_STATEID;
310 return status;
311 }
312
313 status = nfs_sync_inode(dst_inode);
314 if (status)
315 return status;
316
317 res->commit_res.verf = NULL;
318 if (args->sync) {
319 res->commit_res.verf =
320 kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
321 if (!res->commit_res.verf)
322 return -ENOMEM;
323 }
324 set_bit(NFS_CLNT_SRC_SSC_COPY_STATE,
325 &src_lock->open_context->state->flags);
326 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
327 &dst_lock->open_context->state->flags);
328
329 status = nfs4_call_sync(dst_server->client, dst_server, &msg,
330 &args->seq_args, &res->seq_res, 0);
331 if (status == -ENOTSUPP)
332 dst_server->caps &= ~NFS_CAP_COPY;
333 if (status)
334 goto out;
335
336 if (args->sync &&
337 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
338 &res->commit_res.verf->verifier)) {
339 status = -EAGAIN;
340 goto out;
341 }
342
343 if (!res->synchronous) {
344 status = handle_async_copy(res, dst_server, src_server, src,
345 dst, &args->src_stateid, restart);
346 if (status)
347 goto out;
348 }
349
350 if ((!res->synchronous || !args->sync) &&
351 res->write_res.verifier.committed != NFS_FILE_SYNC) {
352 status = process_copy_commit(dst, pos_dst, res);
353 if (status)
354 goto out;
355 }
356
357 truncate_pagecache_range(dst_inode, pos_dst,
358 pos_dst + res->write_res.count);
359 spin_lock(&dst_inode->i_lock);
360 NFS_I(dst_inode)->cache_validity |= (NFS_INO_REVAL_PAGECACHE |
361 NFS_INO_REVAL_FORCED | NFS_INO_INVALID_SIZE |
362 NFS_INO_INVALID_ATTR | NFS_INO_INVALID_DATA);
363 spin_unlock(&dst_inode->i_lock);
364 spin_lock(&src_inode->i_lock);
365 NFS_I(src_inode)->cache_validity |= (NFS_INO_REVAL_PAGECACHE |
366 NFS_INO_REVAL_FORCED | NFS_INO_INVALID_ATIME);
367 spin_unlock(&src_inode->i_lock);
368 status = res->write_res.count;
369out:
370 if (args->sync)
371 kfree(res->commit_res.verf);
372 return status;
373}
374
375ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
376 struct file *dst, loff_t pos_dst, size_t count,
377 struct nl4_server *nss,
378 nfs4_stateid *cnr_stateid, bool sync)
379{
380 struct nfs_server *server = NFS_SERVER(file_inode(dst));
381 struct nfs_lock_context *src_lock;
382 struct nfs_lock_context *dst_lock;
383 struct nfs42_copy_args args = {
384 .src_fh = NFS_FH(file_inode(src)),
385 .src_pos = pos_src,
386 .dst_fh = NFS_FH(file_inode(dst)),
387 .dst_pos = pos_dst,
388 .count = count,
389 .sync = sync,
390 };
391 struct nfs42_copy_res res;
392 struct nfs4_exception src_exception = {
393 .inode = file_inode(src),
394 .stateid = &args.src_stateid,
395 };
396 struct nfs4_exception dst_exception = {
397 .inode = file_inode(dst),
398 .stateid = &args.dst_stateid,
399 };
400 ssize_t err, err2;
401 bool restart = false;
402
403 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
404 if (IS_ERR(src_lock))
405 return PTR_ERR(src_lock);
406
407 src_exception.state = src_lock->open_context->state;
408
409 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
410 if (IS_ERR(dst_lock)) {
411 err = PTR_ERR(dst_lock);
412 goto out_put_src_lock;
413 }
414
415 dst_exception.state = dst_lock->open_context->state;
416
417 do {
418 inode_lock(file_inode(dst));
419 err = _nfs42_proc_copy(src, src_lock,
420 dst, dst_lock,
421 &args, &res,
422 nss, cnr_stateid, &restart);
423 inode_unlock(file_inode(dst));
424
425 if (err >= 0)
426 break;
427 if (err == -ENOTSUPP &&
428 nfs42_files_from_same_server(src, dst)) {
429 err = -EOPNOTSUPP;
430 break;
431 } else if (err == -EAGAIN) {
432 if (!restart) {
433 dst_exception.retry = 1;
434 continue;
435 }
436 break;
437 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
438 args.sync = true;
439 dst_exception.retry = 1;
440 continue;
441 } else if ((err == -ESTALE ||
442 err == -NFS4ERR_OFFLOAD_DENIED ||
443 err == -ENOTSUPP) &&
444 !nfs42_files_from_same_server(src, dst)) {
445 nfs42_do_offload_cancel_async(src, &args.src_stateid);
446 err = -EOPNOTSUPP;
447 break;
448 }
449
450 err2 = nfs4_handle_exception(server, err, &src_exception);
451 err = nfs4_handle_exception(server, err, &dst_exception);
452 if (!err)
453 err = err2;
454 } while (src_exception.retry || dst_exception.retry);
455
456 nfs_put_lock_context(dst_lock);
457out_put_src_lock:
458 nfs_put_lock_context(src_lock);
459 return err;
460}
461
462struct nfs42_offloadcancel_data {
463 struct nfs_server *seq_server;
464 struct nfs42_offload_status_args args;
465 struct nfs42_offload_status_res res;
466};
467
468static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
469{
470 struct nfs42_offloadcancel_data *data = calldata;
471
472 nfs4_setup_sequence(data->seq_server->nfs_client,
473 &data->args.osa_seq_args,
474 &data->res.osr_seq_res, task);
475}
476
477static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
478{
479 struct nfs42_offloadcancel_data *data = calldata;
480
481 nfs41_sequence_done(task, &data->res.osr_seq_res);
482 if (task->tk_status &&
483 nfs4_async_handle_error(task, data->seq_server, NULL,
484 NULL) == -EAGAIN)
485 rpc_restart_call_prepare(task);
486}
487
488static void nfs42_free_offloadcancel_data(void *data)
489{
490 kfree(data);
491}
492
493static const struct rpc_call_ops nfs42_offload_cancel_ops = {
494 .rpc_call_prepare = nfs42_offload_cancel_prepare,
495 .rpc_call_done = nfs42_offload_cancel_done,
496 .rpc_release = nfs42_free_offloadcancel_data,
497};
498
499static int nfs42_do_offload_cancel_async(struct file *dst,
500 nfs4_stateid *stateid)
501{
502 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
503 struct nfs42_offloadcancel_data *data = NULL;
504 struct nfs_open_context *ctx = nfs_file_open_context(dst);
505 struct rpc_task *task;
506 struct rpc_message msg = {
507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
508 .rpc_cred = ctx->cred,
509 };
510 struct rpc_task_setup task_setup_data = {
511 .rpc_client = dst_server->client,
512 .rpc_message = &msg,
513 .callback_ops = &nfs42_offload_cancel_ops,
514 .workqueue = nfsiod_workqueue,
515 .flags = RPC_TASK_ASYNC,
516 };
517 int status;
518
519 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
520 return -EOPNOTSUPP;
521
522 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
523 if (data == NULL)
524 return -ENOMEM;
525
526 data->seq_server = dst_server;
527 data->args.osa_src_fh = NFS_FH(file_inode(dst));
528 memcpy(&data->args.osa_stateid, stateid,
529 sizeof(data->args.osa_stateid));
530 msg.rpc_argp = &data->args;
531 msg.rpc_resp = &data->res;
532 task_setup_data.callback_data = data;
533 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
534 1, 0);
535 task = rpc_run_task(&task_setup_data);
536 if (IS_ERR(task))
537 return PTR_ERR(task);
538 status = rpc_wait_for_completion_task(task);
539 if (status == -ENOTSUPP)
540 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
541 rpc_put_task(task);
542 return status;
543}
544
545static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
546 struct nfs42_copy_notify_args *args,
547 struct nfs42_copy_notify_res *res)
548{
549 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
550 struct rpc_message msg = {
551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
552 .rpc_argp = args,
553 .rpc_resp = res,
554 };
555 int status;
556 struct nfs_open_context *ctx;
557 struct nfs_lock_context *l_ctx;
558
559 ctx = get_nfs_open_context(nfs_file_open_context(src));
560 l_ctx = nfs_get_lock_context(ctx);
561 if (IS_ERR(l_ctx))
562 return PTR_ERR(l_ctx);
563
564 status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
565 FMODE_READ);
566 nfs_put_lock_context(l_ctx);
567 if (status) {
568 if (status == -EAGAIN)
569 status = -NFS4ERR_BAD_STATEID;
570 return status;
571 }
572
573 status = nfs4_call_sync(src_server->client, src_server, &msg,
574 &args->cna_seq_args, &res->cnr_seq_res, 0);
575 if (status == -ENOTSUPP)
576 src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
577
578 put_nfs_open_context(nfs_file_open_context(src));
579 return status;
580}
581
582int nfs42_proc_copy_notify(struct file *src, struct file *dst,
583 struct nfs42_copy_notify_res *res)
584{
585 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
586 struct nfs42_copy_notify_args *args;
587 struct nfs4_exception exception = {
588 .inode = file_inode(src),
589 };
590 int status;
591
592 if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
593 return -EOPNOTSUPP;
594
595 args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_NOFS);
596 if (args == NULL)
597 return -ENOMEM;
598
599 args->cna_src_fh = NFS_FH(file_inode(src)),
600 args->cna_dst.nl4_type = NL4_NETADDR;
601 nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
602 exception.stateid = &args->cna_src_stateid;
603
604 do {
605 status = _nfs42_proc_copy_notify(src, dst, args, res);
606 if (status == -ENOTSUPP) {
607 status = -EOPNOTSUPP;
608 goto out;
609 }
610 status = nfs4_handle_exception(src_server, status, &exception);
611 } while (exception.retry);
612
613out:
614 kfree(args);
615 return status;
616}
617
618static loff_t _nfs42_proc_llseek(struct file *filep,
619 struct nfs_lock_context *lock, loff_t offset, int whence)
620{
621 struct inode *inode = file_inode(filep);
622 struct nfs42_seek_args args = {
623 .sa_fh = NFS_FH(inode),
624 .sa_offset = offset,
625 .sa_what = (whence == SEEK_HOLE) ?
626 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
627 };
628 struct nfs42_seek_res res;
629 struct rpc_message msg = {
630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
631 .rpc_argp = &args,
632 .rpc_resp = &res,
633 };
634 struct nfs_server *server = NFS_SERVER(inode);
635 int status;
636
637 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
638 return -ENOTSUPP;
639
640 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
641 lock, FMODE_READ);
642 if (status) {
643 if (status == -EAGAIN)
644 status = -NFS4ERR_BAD_STATEID;
645 return status;
646 }
647
648 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
649 offset, LLONG_MAX);
650 if (status)
651 return status;
652
653 status = nfs4_call_sync(server->client, server, &msg,
654 &args.seq_args, &res.seq_res, 0);
655 if (status == -ENOTSUPP)
656 server->caps &= ~NFS_CAP_SEEK;
657 if (status)
658 return status;
659
660 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
661}
662
663loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
664{
665 struct nfs_server *server = NFS_SERVER(file_inode(filep));
666 struct nfs4_exception exception = { };
667 struct nfs_lock_context *lock;
668 loff_t err;
669
670 lock = nfs_get_lock_context(nfs_file_open_context(filep));
671 if (IS_ERR(lock))
672 return PTR_ERR(lock);
673
674 exception.inode = file_inode(filep);
675 exception.state = lock->open_context->state;
676
677 do {
678 err = _nfs42_proc_llseek(filep, lock, offset, whence);
679 if (err >= 0)
680 break;
681 if (err == -ENOTSUPP) {
682 err = -EOPNOTSUPP;
683 break;
684 }
685 err = nfs4_handle_exception(server, err, &exception);
686 } while (exception.retry);
687
688 nfs_put_lock_context(lock);
689 return err;
690}
691
692
693static void
694nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
695{
696 struct nfs42_layoutstat_data *data = calldata;
697 struct inode *inode = data->inode;
698 struct nfs_server *server = NFS_SERVER(inode);
699 struct pnfs_layout_hdr *lo;
700
701 spin_lock(&inode->i_lock);
702 lo = NFS_I(inode)->layout;
703 if (!pnfs_layout_is_valid(lo)) {
704 spin_unlock(&inode->i_lock);
705 rpc_exit(task, 0);
706 return;
707 }
708 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
709 spin_unlock(&inode->i_lock);
710 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
711 &data->res.seq_res, task);
712}
713
714static void
715nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
716{
717 struct nfs42_layoutstat_data *data = calldata;
718 struct inode *inode = data->inode;
719 struct pnfs_layout_hdr *lo;
720
721 if (!nfs4_sequence_done(task, &data->res.seq_res))
722 return;
723
724 switch (task->tk_status) {
725 case 0:
726 return;
727 case -NFS4ERR_BADHANDLE:
728 case -ESTALE:
729 pnfs_destroy_layout(NFS_I(inode));
730 break;
731 case -NFS4ERR_EXPIRED:
732 case -NFS4ERR_ADMIN_REVOKED:
733 case -NFS4ERR_DELEG_REVOKED:
734 case -NFS4ERR_STALE_STATEID:
735 case -NFS4ERR_BAD_STATEID:
736 spin_lock(&inode->i_lock);
737 lo = NFS_I(inode)->layout;
738 if (pnfs_layout_is_valid(lo) &&
739 nfs4_stateid_match(&data->args.stateid,
740 &lo->plh_stateid)) {
741 LIST_HEAD(head);
742
743
744
745
746
747 pnfs_mark_layout_stateid_invalid(lo, &head);
748 spin_unlock(&inode->i_lock);
749 pnfs_free_lseg_list(&head);
750 nfs_commit_inode(inode, 0);
751 } else
752 spin_unlock(&inode->i_lock);
753 break;
754 case -NFS4ERR_OLD_STATEID:
755 spin_lock(&inode->i_lock);
756 lo = NFS_I(inode)->layout;
757 if (pnfs_layout_is_valid(lo) &&
758 nfs4_stateid_match_other(&data->args.stateid,
759 &lo->plh_stateid)) {
760
761 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
762 &data->args.stateid))
763 rpc_delay(task, HZ);
764 rpc_restart_call_prepare(task);
765 }
766 spin_unlock(&inode->i_lock);
767 break;
768 case -ENOTSUPP:
769 case -EOPNOTSUPP:
770 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
771 }
772
773 trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
774}
775
776static void
777nfs42_layoutstat_release(void *calldata)
778{
779 struct nfs42_layoutstat_data *data = calldata;
780 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
781 int i;
782
783 for (i = 0; i < data->args.num_dev; i++) {
784 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
785 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
786 }
787
788 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
789 smp_mb__before_atomic();
790 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
791 smp_mb__after_atomic();
792 nfs_iput_and_deactive(data->inode);
793 kfree(data->args.devinfo);
794 kfree(data);
795}
796
797static const struct rpc_call_ops nfs42_layoutstat_ops = {
798 .rpc_call_prepare = nfs42_layoutstat_prepare,
799 .rpc_call_done = nfs42_layoutstat_done,
800 .rpc_release = nfs42_layoutstat_release,
801};
802
803int nfs42_proc_layoutstats_generic(struct nfs_server *server,
804 struct nfs42_layoutstat_data *data)
805{
806 struct rpc_message msg = {
807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
808 .rpc_argp = &data->args,
809 .rpc_resp = &data->res,
810 };
811 struct rpc_task_setup task_setup = {
812 .rpc_client = server->client,
813 .rpc_message = &msg,
814 .callback_ops = &nfs42_layoutstat_ops,
815 .callback_data = data,
816 .flags = RPC_TASK_ASYNC,
817 };
818 struct rpc_task *task;
819
820 data->inode = nfs_igrab_and_active(data->args.inode);
821 if (!data->inode) {
822 nfs42_layoutstat_release(data);
823 return -EAGAIN;
824 }
825 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
826 task = rpc_run_task(&task_setup);
827 if (IS_ERR(task))
828 return PTR_ERR(task);
829 rpc_put_task(task);
830 return 0;
831}
832
833static struct nfs42_layouterror_data *
834nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
835{
836 struct nfs42_layouterror_data *data;
837 struct inode *inode = lseg->pls_layout->plh_inode;
838
839 data = kzalloc(sizeof(*data), gfp_flags);
840 if (data) {
841 data->args.inode = data->inode = nfs_igrab_and_active(inode);
842 if (data->inode) {
843 data->lseg = pnfs_get_lseg(lseg);
844 if (data->lseg)
845 return data;
846 nfs_iput_and_deactive(data->inode);
847 }
848 kfree(data);
849 }
850 return NULL;
851}
852
853static void
854nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
855{
856 pnfs_put_lseg(data->lseg);
857 nfs_iput_and_deactive(data->inode);
858 kfree(data);
859}
860
861static void
862nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
863{
864 struct nfs42_layouterror_data *data = calldata;
865 struct inode *inode = data->inode;
866 struct nfs_server *server = NFS_SERVER(inode);
867 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
868 unsigned i;
869
870 spin_lock(&inode->i_lock);
871 if (!pnfs_layout_is_valid(lo)) {
872 spin_unlock(&inode->i_lock);
873 rpc_exit(task, 0);
874 return;
875 }
876 for (i = 0; i < data->args.num_errors; i++)
877 nfs4_stateid_copy(&data->args.errors[i].stateid,
878 &lo->plh_stateid);
879 spin_unlock(&inode->i_lock);
880 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
881 &data->res.seq_res, task);
882}
883
884static void
885nfs42_layouterror_done(struct rpc_task *task, void *calldata)
886{
887 struct nfs42_layouterror_data *data = calldata;
888 struct inode *inode = data->inode;
889 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
890
891 if (!nfs4_sequence_done(task, &data->res.seq_res))
892 return;
893
894 switch (task->tk_status) {
895 case 0:
896 return;
897 case -NFS4ERR_BADHANDLE:
898 case -ESTALE:
899 pnfs_destroy_layout(NFS_I(inode));
900 break;
901 case -NFS4ERR_EXPIRED:
902 case -NFS4ERR_ADMIN_REVOKED:
903 case -NFS4ERR_DELEG_REVOKED:
904 case -NFS4ERR_STALE_STATEID:
905 case -NFS4ERR_BAD_STATEID:
906 spin_lock(&inode->i_lock);
907 if (pnfs_layout_is_valid(lo) &&
908 nfs4_stateid_match(&data->args.errors[0].stateid,
909 &lo->plh_stateid)) {
910 LIST_HEAD(head);
911
912
913
914
915
916 pnfs_mark_layout_stateid_invalid(lo, &head);
917 spin_unlock(&inode->i_lock);
918 pnfs_free_lseg_list(&head);
919 nfs_commit_inode(inode, 0);
920 } else
921 spin_unlock(&inode->i_lock);
922 break;
923 case -NFS4ERR_OLD_STATEID:
924 spin_lock(&inode->i_lock);
925 if (pnfs_layout_is_valid(lo) &&
926 nfs4_stateid_match_other(&data->args.errors[0].stateid,
927 &lo->plh_stateid)) {
928
929 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
930 &data->args.errors[0].stateid))
931 rpc_delay(task, HZ);
932 rpc_restart_call_prepare(task);
933 }
934 spin_unlock(&inode->i_lock);
935 break;
936 case -ENOTSUPP:
937 case -EOPNOTSUPP:
938 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
939 }
940
941 trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
942 task->tk_status);
943}
944
945static void
946nfs42_layouterror_release(void *calldata)
947{
948 struct nfs42_layouterror_data *data = calldata;
949
950 nfs42_free_layouterror_data(data);
951}
952
953static const struct rpc_call_ops nfs42_layouterror_ops = {
954 .rpc_call_prepare = nfs42_layouterror_prepare,
955 .rpc_call_done = nfs42_layouterror_done,
956 .rpc_release = nfs42_layouterror_release,
957};
958
959int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
960 const struct nfs42_layout_error *errors, size_t n)
961{
962 struct inode *inode = lseg->pls_layout->plh_inode;
963 struct nfs42_layouterror_data *data;
964 struct rpc_task *task;
965 struct rpc_message msg = {
966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
967 };
968 struct rpc_task_setup task_setup = {
969 .rpc_message = &msg,
970 .callback_ops = &nfs42_layouterror_ops,
971 .flags = RPC_TASK_ASYNC,
972 };
973 unsigned int i;
974
975 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
976 return -EOPNOTSUPP;
977 if (n > NFS42_LAYOUTERROR_MAX)
978 return -EINVAL;
979 data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
980 if (!data)
981 return -ENOMEM;
982 for (i = 0; i < n; i++) {
983 data->args.errors[i] = errors[i];
984 data->args.num_errors++;
985 data->res.num_errors++;
986 }
987 msg.rpc_argp = &data->args;
988 msg.rpc_resp = &data->res;
989 task_setup.callback_data = data;
990 task_setup.rpc_client = NFS_SERVER(inode)->client;
991 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
992 task = rpc_run_task(&task_setup);
993 if (IS_ERR(task))
994 return PTR_ERR(task);
995 rpc_put_task(task);
996 return 0;
997}
998EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
999
1000static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
1001 struct file *dst_f, struct nfs_lock_context *src_lock,
1002 struct nfs_lock_context *dst_lock, loff_t src_offset,
1003 loff_t dst_offset, loff_t count)
1004{
1005 struct inode *src_inode = file_inode(src_f);
1006 struct inode *dst_inode = file_inode(dst_f);
1007 struct nfs_server *server = NFS_SERVER(dst_inode);
1008 struct nfs42_clone_args args = {
1009 .src_fh = NFS_FH(src_inode),
1010 .dst_fh = NFS_FH(dst_inode),
1011 .src_offset = src_offset,
1012 .dst_offset = dst_offset,
1013 .count = count,
1014 .dst_bitmask = server->cache_consistency_bitmask,
1015 };
1016 struct nfs42_clone_res res = {
1017 .server = server,
1018 };
1019 int status;
1020
1021 msg->rpc_argp = &args;
1022 msg->rpc_resp = &res;
1023
1024 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
1025 src_lock, FMODE_READ);
1026 if (status) {
1027 if (status == -EAGAIN)
1028 status = -NFS4ERR_BAD_STATEID;
1029 return status;
1030 }
1031 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
1032 dst_lock, FMODE_WRITE);
1033 if (status) {
1034 if (status == -EAGAIN)
1035 status = -NFS4ERR_BAD_STATEID;
1036 return status;
1037 }
1038
1039 res.dst_fattr = nfs_alloc_fattr();
1040 if (!res.dst_fattr)
1041 return -ENOMEM;
1042
1043 status = nfs4_call_sync(server->client, server, msg,
1044 &args.seq_args, &res.seq_res, 0);
1045 if (status == 0)
1046 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
1047
1048 kfree(res.dst_fattr);
1049 return status;
1050}
1051
1052int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
1053 loff_t src_offset, loff_t dst_offset, loff_t count)
1054{
1055 struct rpc_message msg = {
1056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
1057 };
1058 struct inode *inode = file_inode(src_f);
1059 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
1060 struct nfs_lock_context *src_lock;
1061 struct nfs_lock_context *dst_lock;
1062 struct nfs4_exception src_exception = { };
1063 struct nfs4_exception dst_exception = { };
1064 int err, err2;
1065
1066 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
1067 return -EOPNOTSUPP;
1068
1069 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
1070 if (IS_ERR(src_lock))
1071 return PTR_ERR(src_lock);
1072
1073 src_exception.inode = file_inode(src_f);
1074 src_exception.state = src_lock->open_context->state;
1075
1076 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
1077 if (IS_ERR(dst_lock)) {
1078 err = PTR_ERR(dst_lock);
1079 goto out_put_src_lock;
1080 }
1081
1082 dst_exception.inode = file_inode(dst_f);
1083 dst_exception.state = dst_lock->open_context->state;
1084
1085 do {
1086 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
1087 src_offset, dst_offset, count);
1088 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
1089 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
1090 err = -EOPNOTSUPP;
1091 break;
1092 }
1093
1094 err2 = nfs4_handle_exception(server, err, &src_exception);
1095 err = nfs4_handle_exception(server, err, &dst_exception);
1096 if (!err)
1097 err = err2;
1098 } while (src_exception.retry || dst_exception.retry);
1099
1100 nfs_put_lock_context(dst_lock);
1101out_put_src_lock:
1102 nfs_put_lock_context(src_lock);
1103 return err;
1104}
1105
1106#define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
1107
1108static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
1109{
1110 struct nfs_server *server = NFS_SERVER(inode);
1111 struct nfs42_removexattrargs args = {
1112 .fh = NFS_FH(inode),
1113 .xattr_name = name,
1114 };
1115 struct nfs42_removexattrres res;
1116 struct rpc_message msg = {
1117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
1118 .rpc_argp = &args,
1119 .rpc_resp = &res,
1120 };
1121 int ret;
1122 unsigned long timestamp = jiffies;
1123
1124 ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
1125 &res.seq_res, 1);
1126 if (!ret)
1127 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1128
1129 return ret;
1130}
1131
1132static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
1133 const void *buf, size_t buflen, int flags)
1134{
1135 struct nfs_server *server = NFS_SERVER(inode);
1136 struct page *pages[NFS4XATTR_MAXPAGES];
1137 struct nfs42_setxattrargs arg = {
1138 .fh = NFS_FH(inode),
1139 .xattr_pages = pages,
1140 .xattr_len = buflen,
1141 .xattr_name = name,
1142 .xattr_flags = flags,
1143 };
1144 struct nfs42_setxattrres res;
1145 struct rpc_message msg = {
1146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
1147 .rpc_argp = &arg,
1148 .rpc_resp = &res,
1149 };
1150 int ret, np;
1151 unsigned long timestamp = jiffies;
1152
1153 if (buflen > server->sxasize)
1154 return -ERANGE;
1155
1156 if (buflen > 0) {
1157 np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
1158 if (np < 0)
1159 return np;
1160 } else
1161 np = 0;
1162
1163 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1164 &res.seq_res, 1);
1165
1166 for (; np > 0; np--)
1167 put_page(pages[np - 1]);
1168
1169 if (!ret)
1170 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1171
1172 return ret;
1173}
1174
1175static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
1176 void *buf, size_t buflen, struct page **pages,
1177 size_t plen)
1178{
1179 struct nfs_server *server = NFS_SERVER(inode);
1180 struct nfs42_getxattrargs arg = {
1181 .fh = NFS_FH(inode),
1182 .xattr_name = name,
1183 };
1184 struct nfs42_getxattrres res;
1185 struct rpc_message msg = {
1186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
1187 .rpc_argp = &arg,
1188 .rpc_resp = &res,
1189 };
1190 ssize_t ret;
1191
1192 arg.xattr_len = plen;
1193 arg.xattr_pages = pages;
1194
1195 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1196 &res.seq_res, 0);
1197 if (ret < 0)
1198 return ret;
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210 nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
1211
1212 if (buflen) {
1213 if (res.xattr_len > buflen)
1214 return -ERANGE;
1215 _copy_from_pages(buf, pages, 0, res.xattr_len);
1216 }
1217
1218 return res.xattr_len;
1219}
1220
1221static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
1222 size_t buflen, u64 *cookiep, bool *eofp)
1223{
1224 struct nfs_server *server = NFS_SERVER(inode);
1225 struct page **pages;
1226 struct nfs42_listxattrsargs arg = {
1227 .fh = NFS_FH(inode),
1228 .cookie = *cookiep,
1229 };
1230 struct nfs42_listxattrsres res = {
1231 .eof = false,
1232 .xattr_buf = buf,
1233 .xattr_len = buflen,
1234 };
1235 struct rpc_message msg = {
1236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
1237 .rpc_argp = &arg,
1238 .rpc_resp = &res,
1239 };
1240 u32 xdrlen;
1241 int ret, np, i;
1242
1243
1244 ret = -ENOMEM;
1245 res.scratch = alloc_page(GFP_KERNEL);
1246 if (!res.scratch)
1247 goto out;
1248
1249 xdrlen = nfs42_listxattr_xdrsize(buflen);
1250 if (xdrlen > server->lxasize)
1251 xdrlen = server->lxasize;
1252 np = xdrlen / PAGE_SIZE + 1;
1253
1254 pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
1255 if (!pages)
1256 goto out_free_scratch;
1257 for (i = 0; i < np; i++) {
1258 pages[i] = alloc_page(GFP_KERNEL);
1259 if (!pages[i])
1260 goto out_free_pages;
1261 }
1262
1263 arg.xattr_pages = pages;
1264 arg.count = xdrlen;
1265
1266 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1267 &res.seq_res, 0);
1268
1269 if (ret >= 0) {
1270 ret = res.copied;
1271 *cookiep = res.cookie;
1272 *eofp = res.eof;
1273 }
1274
1275out_free_pages:
1276 while (--np >= 0) {
1277 if (pages[np])
1278 __free_page(pages[np]);
1279 }
1280 kfree(pages);
1281out_free_scratch:
1282 __free_page(res.scratch);
1283out:
1284 return ret;
1285
1286}
1287
1288ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
1289 void *buf, size_t buflen)
1290{
1291 struct nfs4_exception exception = { };
1292 ssize_t err, np, i;
1293 struct page **pages;
1294
1295 np = nfs_page_array_len(0, buflen ?: XATTR_SIZE_MAX);
1296 pages = kmalloc_array(np, sizeof(*pages), GFP_KERNEL);
1297 if (!pages)
1298 return -ENOMEM;
1299
1300 for (i = 0; i < np; i++) {
1301 pages[i] = alloc_page(GFP_KERNEL);
1302 if (!pages[i]) {
1303 np = i + 1;
1304 err = -ENOMEM;
1305 goto out;
1306 }
1307 }
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317 do {
1318 err = _nfs42_proc_getxattr(inode, name, buf, buflen,
1319 pages, np * PAGE_SIZE);
1320 if (err >= 0)
1321 break;
1322 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1323 &exception);
1324 } while (exception.retry);
1325
1326out:
1327 while (--np >= 0)
1328 __free_page(pages[np]);
1329 kfree(pages);
1330
1331 return err;
1332}
1333
1334int nfs42_proc_setxattr(struct inode *inode, const char *name,
1335 const void *buf, size_t buflen, int flags)
1336{
1337 struct nfs4_exception exception = { };
1338 int err;
1339
1340 do {
1341 err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
1342 if (!err)
1343 break;
1344 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1345 &exception);
1346 } while (exception.retry);
1347
1348 return err;
1349}
1350
1351ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
1352 size_t buflen, u64 *cookiep, bool *eofp)
1353{
1354 struct nfs4_exception exception = { };
1355 ssize_t err;
1356
1357 do {
1358 err = _nfs42_proc_listxattrs(inode, buf, buflen,
1359 cookiep, eofp);
1360 if (err >= 0)
1361 break;
1362 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1363 &exception);
1364 } while (exception.retry);
1365
1366 return err;
1367}
1368
1369int nfs42_proc_removexattr(struct inode *inode, const char *name)
1370{
1371 struct nfs4_exception exception = { };
1372 int err;
1373
1374 do {
1375 err = _nfs42_proc_removexattr(inode, name);
1376 if (!err)
1377 break;
1378 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1379 &exception);
1380 } while (exception.retry);
1381
1382 return err;
1383}
1384
