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 u32 bitmask[3];
50 struct nfs42_falloc_args args = {
51 .falloc_fh = NFS_FH(inode),
52 .falloc_offset = offset,
53 .falloc_length = len,
54 .falloc_bitmask = bitmask,
55 };
56 struct nfs42_falloc_res res = {
57 .falloc_server = server,
58 };
59 int status;
60
61 msg->rpc_argp = &args;
62 msg->rpc_resp = &res;
63
64 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
65 lock, FMODE_WRITE);
66 if (status) {
67 if (status == -EAGAIN)
68 status = -NFS4ERR_BAD_STATEID;
69 return status;
70 }
71
72 memcpy(bitmask, server->cache_consistency_bitmask, sizeof(bitmask));
73 if (server->attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)
74 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
75
76 res.falloc_fattr = nfs_alloc_fattr();
77 if (!res.falloc_fattr)
78 return -ENOMEM;
79
80 status = nfs4_call_sync(server->client, server, msg,
81 &args.seq_args, &res.seq_res, 0);
82 if (status == 0)
83 status = nfs_post_op_update_inode_force_wcc(inode,
84 res.falloc_fattr);
85
86 kfree(res.falloc_fattr);
87 return status;
88}
89
90static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
91 loff_t offset, loff_t len)
92{
93 struct inode *inode = file_inode(filep);
94 struct nfs_server *server = NFS_SERVER(inode);
95 struct nfs4_exception exception = { };
96 struct nfs_lock_context *lock;
97 int err;
98
99 lock = nfs_get_lock_context(nfs_file_open_context(filep));
100 if (IS_ERR(lock))
101 return PTR_ERR(lock);
102
103 exception.inode = inode;
104 exception.state = lock->open_context->state;
105
106 err = nfs_sync_inode(inode);
107 if (err)
108 goto out;
109
110 do {
111 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
112 if (err == -ENOTSUPP) {
113 err = -EOPNOTSUPP;
114 break;
115 }
116 err = nfs4_handle_exception(server, err, &exception);
117 } while (exception.retry);
118out:
119 nfs_put_lock_context(lock);
120 return err;
121}
122
123int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
124{
125 struct rpc_message msg = {
126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
127 };
128 struct inode *inode = file_inode(filep);
129 int err;
130
131 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
132 return -EOPNOTSUPP;
133
134 inode_lock(inode);
135
136 err = nfs42_proc_fallocate(&msg, filep, offset, len);
137 if (err == -EOPNOTSUPP)
138 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
139
140 inode_unlock(inode);
141 return err;
142}
143
144int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
145{
146 struct rpc_message msg = {
147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
148 };
149 struct inode *inode = file_inode(filep);
150 int err;
151
152 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
153 return -EOPNOTSUPP;
154
155 inode_lock(inode);
156
157 err = nfs42_proc_fallocate(&msg, filep, offset, len);
158 if (err == 0)
159 truncate_pagecache_range(inode, offset, (offset + len) -1);
160 if (err == -EOPNOTSUPP)
161 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
162
163 inode_unlock(inode);
164 return err;
165}
166
167static int handle_async_copy(struct nfs42_copy_res *res,
168 struct nfs_server *dst_server,
169 struct nfs_server *src_server,
170 struct file *src,
171 struct file *dst,
172 nfs4_stateid *src_stateid,
173 bool *restart)
174{
175 struct nfs4_copy_state *copy, *tmp_copy;
176 int status = NFS4_OK;
177 bool found_pending = false;
178 struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
179 struct nfs_open_context *src_ctx = nfs_file_open_context(src);
180
181 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
182 if (!copy)
183 return -ENOMEM;
184
185 spin_lock(&dst_server->nfs_client->cl_lock);
186 list_for_each_entry(tmp_copy,
187 &dst_server->nfs_client->pending_cb_stateids,
188 copies) {
189 if (memcmp(&res->write_res.stateid, &tmp_copy->stateid,
190 NFS4_STATEID_SIZE))
191 continue;
192 found_pending = true;
193 list_del(&tmp_copy->copies);
194 break;
195 }
196 if (found_pending) {
197 spin_unlock(&dst_server->nfs_client->cl_lock);
198 kfree(copy);
199 copy = tmp_copy;
200 goto out;
201 }
202
203 memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
204 init_completion(©->completion);
205 copy->parent_dst_state = dst_ctx->state;
206 copy->parent_src_state = src_ctx->state;
207
208 list_add_tail(©->copies, &dst_server->ss_copies);
209 spin_unlock(&dst_server->nfs_client->cl_lock);
210
211 if (dst_server != src_server) {
212 spin_lock(&src_server->nfs_client->cl_lock);
213 list_add_tail(©->src_copies, &src_server->ss_copies);
214 spin_unlock(&src_server->nfs_client->cl_lock);
215 }
216
217 status = wait_for_completion_interruptible(©->completion);
218 spin_lock(&dst_server->nfs_client->cl_lock);
219 list_del_init(©->copies);
220 spin_unlock(&dst_server->nfs_client->cl_lock);
221 if (dst_server != src_server) {
222 spin_lock(&src_server->nfs_client->cl_lock);
223 list_del_init(©->src_copies);
224 spin_unlock(&src_server->nfs_client->cl_lock);
225 }
226 if (status == -ERESTARTSYS) {
227 goto out_cancel;
228 } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
229 status = -EAGAIN;
230 *restart = true;
231 goto out_cancel;
232 }
233out:
234 res->write_res.count = copy->count;
235 memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
236 status = -copy->error;
237
238out_free:
239 kfree(copy);
240 return status;
241out_cancel:
242 nfs42_do_offload_cancel_async(dst, ©->stateid);
243 if (!nfs42_files_from_same_server(src, dst))
244 nfs42_do_offload_cancel_async(src, src_stateid);
245 goto out_free;
246}
247
248static int process_copy_commit(struct file *dst, loff_t pos_dst,
249 struct nfs42_copy_res *res)
250{
251 struct nfs_commitres cres;
252 int status = -ENOMEM;
253
254 cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
255 if (!cres.verf)
256 goto out;
257
258 status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
259 if (status)
260 goto out_free;
261 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
262 &cres.verf->verifier)) {
263 dprintk("commit verf differs from copy verf\n");
264 status = -EAGAIN;
265 }
266out_free:
267 kfree(cres.verf);
268out:
269 return status;
270}
271
272
273
274
275
276
277
278
279
280
281
282
283static void nfs42_copy_dest_done(struct inode *inode, loff_t pos, loff_t len)
284{
285 loff_t newsize = pos + len;
286 loff_t end = newsize - 1;
287
288 truncate_pagecache_range(inode, pos, end);
289 spin_lock(&inode->i_lock);
290 if (newsize > i_size_read(inode))
291 i_size_write(inode, newsize);
292 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
293 NFS_INO_INVALID_CTIME |
294 NFS_INO_INVALID_MTIME |
295 NFS_INO_INVALID_BLOCKS);
296 spin_unlock(&inode->i_lock);
297}
298
299static ssize_t _nfs42_proc_copy(struct file *src,
300 struct nfs_lock_context *src_lock,
301 struct file *dst,
302 struct nfs_lock_context *dst_lock,
303 struct nfs42_copy_args *args,
304 struct nfs42_copy_res *res,
305 struct nl4_server *nss,
306 nfs4_stateid *cnr_stateid,
307 bool *restart)
308{
309 struct rpc_message msg = {
310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
311 .rpc_argp = args,
312 .rpc_resp = res,
313 };
314 struct inode *dst_inode = file_inode(dst);
315 struct inode *src_inode = file_inode(src);
316 struct nfs_server *dst_server = NFS_SERVER(dst_inode);
317 struct nfs_server *src_server = NFS_SERVER(src_inode);
318 loff_t pos_src = args->src_pos;
319 loff_t pos_dst = args->dst_pos;
320 size_t count = args->count;
321 ssize_t status;
322
323 if (nss) {
324 args->cp_src = nss;
325 nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
326 } else {
327 status = nfs4_set_rw_stateid(&args->src_stateid,
328 src_lock->open_context, src_lock, FMODE_READ);
329 if (status) {
330 if (status == -EAGAIN)
331 status = -NFS4ERR_BAD_STATEID;
332 return status;
333 }
334 }
335 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
336 pos_src, pos_src + (loff_t)count - 1);
337 if (status)
338 return status;
339
340 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
341 dst_lock, FMODE_WRITE);
342 if (status) {
343 if (status == -EAGAIN)
344 status = -NFS4ERR_BAD_STATEID;
345 return status;
346 }
347
348 status = nfs_sync_inode(dst_inode);
349 if (status)
350 return status;
351
352 res->commit_res.verf = NULL;
353 if (args->sync) {
354 res->commit_res.verf =
355 kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
356 if (!res->commit_res.verf)
357 return -ENOMEM;
358 }
359 set_bit(NFS_CLNT_SRC_SSC_COPY_STATE,
360 &src_lock->open_context->state->flags);
361 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
362 &dst_lock->open_context->state->flags);
363
364 status = nfs4_call_sync(dst_server->client, dst_server, &msg,
365 &args->seq_args, &res->seq_res, 0);
366 if (status == -ENOTSUPP)
367 dst_server->caps &= ~NFS_CAP_COPY;
368 if (status)
369 goto out;
370
371 if (args->sync &&
372 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
373 &res->commit_res.verf->verifier)) {
374 status = -EAGAIN;
375 goto out;
376 }
377
378 if (!res->synchronous) {
379 status = handle_async_copy(res, dst_server, src_server, src,
380 dst, &args->src_stateid, restart);
381 if (status)
382 goto out;
383 }
384
385 if ((!res->synchronous || !args->sync) &&
386 res->write_res.verifier.committed != NFS_FILE_SYNC) {
387 status = process_copy_commit(dst, pos_dst, res);
388 if (status)
389 goto out;
390 }
391
392 nfs42_copy_dest_done(dst_inode, pos_dst, res->write_res.count);
393 nfs_invalidate_atime(src_inode);
394 status = res->write_res.count;
395out:
396 if (args->sync)
397 kfree(res->commit_res.verf);
398 return status;
399}
400
401ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
402 struct file *dst, loff_t pos_dst, size_t count,
403 struct nl4_server *nss,
404 nfs4_stateid *cnr_stateid, bool sync)
405{
406 struct nfs_server *server = NFS_SERVER(file_inode(dst));
407 struct nfs_lock_context *src_lock;
408 struct nfs_lock_context *dst_lock;
409 struct nfs42_copy_args args = {
410 .src_fh = NFS_FH(file_inode(src)),
411 .src_pos = pos_src,
412 .dst_fh = NFS_FH(file_inode(dst)),
413 .dst_pos = pos_dst,
414 .count = count,
415 .sync = sync,
416 };
417 struct nfs42_copy_res res;
418 struct nfs4_exception src_exception = {
419 .inode = file_inode(src),
420 .stateid = &args.src_stateid,
421 };
422 struct nfs4_exception dst_exception = {
423 .inode = file_inode(dst),
424 .stateid = &args.dst_stateid,
425 };
426 ssize_t err, err2;
427 bool restart = false;
428
429 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
430 if (IS_ERR(src_lock))
431 return PTR_ERR(src_lock);
432
433 src_exception.state = src_lock->open_context->state;
434
435 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
436 if (IS_ERR(dst_lock)) {
437 err = PTR_ERR(dst_lock);
438 goto out_put_src_lock;
439 }
440
441 dst_exception.state = dst_lock->open_context->state;
442
443 do {
444 inode_lock(file_inode(dst));
445 err = _nfs42_proc_copy(src, src_lock,
446 dst, dst_lock,
447 &args, &res,
448 nss, cnr_stateid, &restart);
449 inode_unlock(file_inode(dst));
450
451 if (err >= 0)
452 break;
453 if (err == -ENOTSUPP &&
454 nfs42_files_from_same_server(src, dst)) {
455 err = -EOPNOTSUPP;
456 break;
457 } else if (err == -EAGAIN) {
458 if (!restart) {
459 dst_exception.retry = 1;
460 continue;
461 }
462 break;
463 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
464 args.sync = true;
465 dst_exception.retry = 1;
466 continue;
467 } else if ((err == -ESTALE ||
468 err == -NFS4ERR_OFFLOAD_DENIED ||
469 err == -ENOTSUPP) &&
470 !nfs42_files_from_same_server(src, dst)) {
471 nfs42_do_offload_cancel_async(src, &args.src_stateid);
472 err = -EOPNOTSUPP;
473 break;
474 }
475
476 err2 = nfs4_handle_exception(server, err, &src_exception);
477 err = nfs4_handle_exception(server, err, &dst_exception);
478 if (!err)
479 err = err2;
480 } while (src_exception.retry || dst_exception.retry);
481
482 nfs_put_lock_context(dst_lock);
483out_put_src_lock:
484 nfs_put_lock_context(src_lock);
485 return err;
486}
487
488struct nfs42_offloadcancel_data {
489 struct nfs_server *seq_server;
490 struct nfs42_offload_status_args args;
491 struct nfs42_offload_status_res res;
492};
493
494static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
495{
496 struct nfs42_offloadcancel_data *data = calldata;
497
498 nfs4_setup_sequence(data->seq_server->nfs_client,
499 &data->args.osa_seq_args,
500 &data->res.osr_seq_res, task);
501}
502
503static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
504{
505 struct nfs42_offloadcancel_data *data = calldata;
506
507 nfs41_sequence_done(task, &data->res.osr_seq_res);
508 if (task->tk_status &&
509 nfs4_async_handle_error(task, data->seq_server, NULL,
510 NULL) == -EAGAIN)
511 rpc_restart_call_prepare(task);
512}
513
514static void nfs42_free_offloadcancel_data(void *data)
515{
516 kfree(data);
517}
518
519static const struct rpc_call_ops nfs42_offload_cancel_ops = {
520 .rpc_call_prepare = nfs42_offload_cancel_prepare,
521 .rpc_call_done = nfs42_offload_cancel_done,
522 .rpc_release = nfs42_free_offloadcancel_data,
523};
524
525static int nfs42_do_offload_cancel_async(struct file *dst,
526 nfs4_stateid *stateid)
527{
528 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
529 struct nfs42_offloadcancel_data *data = NULL;
530 struct nfs_open_context *ctx = nfs_file_open_context(dst);
531 struct rpc_task *task;
532 struct rpc_message msg = {
533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
534 .rpc_cred = ctx->cred,
535 };
536 struct rpc_task_setup task_setup_data = {
537 .rpc_client = dst_server->client,
538 .rpc_message = &msg,
539 .callback_ops = &nfs42_offload_cancel_ops,
540 .workqueue = nfsiod_workqueue,
541 .flags = RPC_TASK_ASYNC,
542 };
543 int status;
544
545 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
546 return -EOPNOTSUPP;
547
548 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
549 if (data == NULL)
550 return -ENOMEM;
551
552 data->seq_server = dst_server;
553 data->args.osa_src_fh = NFS_FH(file_inode(dst));
554 memcpy(&data->args.osa_stateid, stateid,
555 sizeof(data->args.osa_stateid));
556 msg.rpc_argp = &data->args;
557 msg.rpc_resp = &data->res;
558 task_setup_data.callback_data = data;
559 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
560 1, 0);
561 task = rpc_run_task(&task_setup_data);
562 if (IS_ERR(task))
563 return PTR_ERR(task);
564 status = rpc_wait_for_completion_task(task);
565 if (status == -ENOTSUPP)
566 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
567 rpc_put_task(task);
568 return status;
569}
570
571static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
572 struct nfs42_copy_notify_args *args,
573 struct nfs42_copy_notify_res *res)
574{
575 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
576 struct rpc_message msg = {
577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
578 .rpc_argp = args,
579 .rpc_resp = res,
580 };
581 int status;
582 struct nfs_open_context *ctx;
583 struct nfs_lock_context *l_ctx;
584
585 ctx = get_nfs_open_context(nfs_file_open_context(src));
586 l_ctx = nfs_get_lock_context(ctx);
587 if (IS_ERR(l_ctx))
588 return PTR_ERR(l_ctx);
589
590 status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
591 FMODE_READ);
592 nfs_put_lock_context(l_ctx);
593 if (status) {
594 if (status == -EAGAIN)
595 status = -NFS4ERR_BAD_STATEID;
596 return status;
597 }
598
599 status = nfs4_call_sync(src_server->client, src_server, &msg,
600 &args->cna_seq_args, &res->cnr_seq_res, 0);
601 if (status == -ENOTSUPP)
602 src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
603
604 put_nfs_open_context(nfs_file_open_context(src));
605 return status;
606}
607
608int nfs42_proc_copy_notify(struct file *src, struct file *dst,
609 struct nfs42_copy_notify_res *res)
610{
611 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
612 struct nfs42_copy_notify_args *args;
613 struct nfs4_exception exception = {
614 .inode = file_inode(src),
615 };
616 int status;
617
618 if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
619 return -EOPNOTSUPP;
620
621 args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_NOFS);
622 if (args == NULL)
623 return -ENOMEM;
624
625 args->cna_src_fh = NFS_FH(file_inode(src)),
626 args->cna_dst.nl4_type = NL4_NETADDR;
627 nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
628 exception.stateid = &args->cna_src_stateid;
629
630 do {
631 status = _nfs42_proc_copy_notify(src, dst, args, res);
632 if (status == -ENOTSUPP) {
633 status = -EOPNOTSUPP;
634 goto out;
635 }
636 status = nfs4_handle_exception(src_server, status, &exception);
637 } while (exception.retry);
638
639out:
640 kfree(args);
641 return status;
642}
643
644static loff_t _nfs42_proc_llseek(struct file *filep,
645 struct nfs_lock_context *lock, loff_t offset, int whence)
646{
647 struct inode *inode = file_inode(filep);
648 struct nfs42_seek_args args = {
649 .sa_fh = NFS_FH(inode),
650 .sa_offset = offset,
651 .sa_what = (whence == SEEK_HOLE) ?
652 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
653 };
654 struct nfs42_seek_res res;
655 struct rpc_message msg = {
656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
657 .rpc_argp = &args,
658 .rpc_resp = &res,
659 };
660 struct nfs_server *server = NFS_SERVER(inode);
661 int status;
662
663 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
664 return -ENOTSUPP;
665
666 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
667 lock, FMODE_READ);
668 if (status) {
669 if (status == -EAGAIN)
670 status = -NFS4ERR_BAD_STATEID;
671 return status;
672 }
673
674 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
675 offset, LLONG_MAX);
676 if (status)
677 return status;
678
679 status = nfs4_call_sync(server->client, server, &msg,
680 &args.seq_args, &res.seq_res, 0);
681 if (status == -ENOTSUPP)
682 server->caps &= ~NFS_CAP_SEEK;
683 if (status)
684 return status;
685
686 if (whence == SEEK_DATA && res.sr_eof)
687 return -NFS4ERR_NXIO;
688 else
689 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
690}
691
692loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
693{
694 struct nfs_server *server = NFS_SERVER(file_inode(filep));
695 struct nfs4_exception exception = { };
696 struct nfs_lock_context *lock;
697 loff_t err;
698
699 lock = nfs_get_lock_context(nfs_file_open_context(filep));
700 if (IS_ERR(lock))
701 return PTR_ERR(lock);
702
703 exception.inode = file_inode(filep);
704 exception.state = lock->open_context->state;
705
706 do {
707 err = _nfs42_proc_llseek(filep, lock, offset, whence);
708 if (err >= 0)
709 break;
710 if (err == -ENOTSUPP) {
711 err = -EOPNOTSUPP;
712 break;
713 }
714 err = nfs4_handle_exception(server, err, &exception);
715 } while (exception.retry);
716
717 nfs_put_lock_context(lock);
718 return err;
719}
720
721
722static void
723nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
724{
725 struct nfs42_layoutstat_data *data = calldata;
726 struct inode *inode = data->inode;
727 struct nfs_server *server = NFS_SERVER(inode);
728 struct pnfs_layout_hdr *lo;
729
730 spin_lock(&inode->i_lock);
731 lo = NFS_I(inode)->layout;
732 if (!pnfs_layout_is_valid(lo)) {
733 spin_unlock(&inode->i_lock);
734 rpc_exit(task, 0);
735 return;
736 }
737 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
738 spin_unlock(&inode->i_lock);
739 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
740 &data->res.seq_res, task);
741}
742
743static void
744nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
745{
746 struct nfs42_layoutstat_data *data = calldata;
747 struct inode *inode = data->inode;
748 struct pnfs_layout_hdr *lo;
749
750 if (!nfs4_sequence_done(task, &data->res.seq_res))
751 return;
752
753 switch (task->tk_status) {
754 case 0:
755 return;
756 case -NFS4ERR_BADHANDLE:
757 case -ESTALE:
758 pnfs_destroy_layout(NFS_I(inode));
759 break;
760 case -NFS4ERR_EXPIRED:
761 case -NFS4ERR_ADMIN_REVOKED:
762 case -NFS4ERR_DELEG_REVOKED:
763 case -NFS4ERR_STALE_STATEID:
764 case -NFS4ERR_BAD_STATEID:
765 spin_lock(&inode->i_lock);
766 lo = NFS_I(inode)->layout;
767 if (pnfs_layout_is_valid(lo) &&
768 nfs4_stateid_match(&data->args.stateid,
769 &lo->plh_stateid)) {
770 LIST_HEAD(head);
771
772
773
774
775
776 pnfs_mark_layout_stateid_invalid(lo, &head);
777 spin_unlock(&inode->i_lock);
778 pnfs_free_lseg_list(&head);
779 nfs_commit_inode(inode, 0);
780 } else
781 spin_unlock(&inode->i_lock);
782 break;
783 case -NFS4ERR_OLD_STATEID:
784 spin_lock(&inode->i_lock);
785 lo = NFS_I(inode)->layout;
786 if (pnfs_layout_is_valid(lo) &&
787 nfs4_stateid_match_other(&data->args.stateid,
788 &lo->plh_stateid)) {
789
790 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
791 &data->args.stateid))
792 rpc_delay(task, HZ);
793 rpc_restart_call_prepare(task);
794 }
795 spin_unlock(&inode->i_lock);
796 break;
797 case -ENOTSUPP:
798 case -EOPNOTSUPP:
799 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
800 }
801
802 trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
803}
804
805static void
806nfs42_layoutstat_release(void *calldata)
807{
808 struct nfs42_layoutstat_data *data = calldata;
809 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
810 int i;
811
812 for (i = 0; i < data->args.num_dev; i++) {
813 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
814 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
815 }
816
817 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
818 smp_mb__before_atomic();
819 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
820 smp_mb__after_atomic();
821 nfs_iput_and_deactive(data->inode);
822 kfree(data->args.devinfo);
823 kfree(data);
824}
825
826static const struct rpc_call_ops nfs42_layoutstat_ops = {
827 .rpc_call_prepare = nfs42_layoutstat_prepare,
828 .rpc_call_done = nfs42_layoutstat_done,
829 .rpc_release = nfs42_layoutstat_release,
830};
831
832int nfs42_proc_layoutstats_generic(struct nfs_server *server,
833 struct nfs42_layoutstat_data *data)
834{
835 struct rpc_message msg = {
836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
837 .rpc_argp = &data->args,
838 .rpc_resp = &data->res,
839 };
840 struct rpc_task_setup task_setup = {
841 .rpc_client = server->client,
842 .rpc_message = &msg,
843 .callback_ops = &nfs42_layoutstat_ops,
844 .callback_data = data,
845 .flags = RPC_TASK_ASYNC,
846 };
847 struct rpc_task *task;
848
849 data->inode = nfs_igrab_and_active(data->args.inode);
850 if (!data->inode) {
851 nfs42_layoutstat_release(data);
852 return -EAGAIN;
853 }
854 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
855 task = rpc_run_task(&task_setup);
856 if (IS_ERR(task))
857 return PTR_ERR(task);
858 rpc_put_task(task);
859 return 0;
860}
861
862static struct nfs42_layouterror_data *
863nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
864{
865 struct nfs42_layouterror_data *data;
866 struct inode *inode = lseg->pls_layout->plh_inode;
867
868 data = kzalloc(sizeof(*data), gfp_flags);
869 if (data) {
870 data->args.inode = data->inode = nfs_igrab_and_active(inode);
871 if (data->inode) {
872 data->lseg = pnfs_get_lseg(lseg);
873 if (data->lseg)
874 return data;
875 nfs_iput_and_deactive(data->inode);
876 }
877 kfree(data);
878 }
879 return NULL;
880}
881
882static void
883nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
884{
885 pnfs_put_lseg(data->lseg);
886 nfs_iput_and_deactive(data->inode);
887 kfree(data);
888}
889
890static void
891nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
892{
893 struct nfs42_layouterror_data *data = calldata;
894 struct inode *inode = data->inode;
895 struct nfs_server *server = NFS_SERVER(inode);
896 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
897 unsigned i;
898
899 spin_lock(&inode->i_lock);
900 if (!pnfs_layout_is_valid(lo)) {
901 spin_unlock(&inode->i_lock);
902 rpc_exit(task, 0);
903 return;
904 }
905 for (i = 0; i < data->args.num_errors; i++)
906 nfs4_stateid_copy(&data->args.errors[i].stateid,
907 &lo->plh_stateid);
908 spin_unlock(&inode->i_lock);
909 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
910 &data->res.seq_res, task);
911}
912
913static void
914nfs42_layouterror_done(struct rpc_task *task, void *calldata)
915{
916 struct nfs42_layouterror_data *data = calldata;
917 struct inode *inode = data->inode;
918 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
919
920 if (!nfs4_sequence_done(task, &data->res.seq_res))
921 return;
922
923 switch (task->tk_status) {
924 case 0:
925 return;
926 case -NFS4ERR_BADHANDLE:
927 case -ESTALE:
928 pnfs_destroy_layout(NFS_I(inode));
929 break;
930 case -NFS4ERR_EXPIRED:
931 case -NFS4ERR_ADMIN_REVOKED:
932 case -NFS4ERR_DELEG_REVOKED:
933 case -NFS4ERR_STALE_STATEID:
934 case -NFS4ERR_BAD_STATEID:
935 spin_lock(&inode->i_lock);
936 if (pnfs_layout_is_valid(lo) &&
937 nfs4_stateid_match(&data->args.errors[0].stateid,
938 &lo->plh_stateid)) {
939 LIST_HEAD(head);
940
941
942
943
944
945 pnfs_mark_layout_stateid_invalid(lo, &head);
946 spin_unlock(&inode->i_lock);
947 pnfs_free_lseg_list(&head);
948 nfs_commit_inode(inode, 0);
949 } else
950 spin_unlock(&inode->i_lock);
951 break;
952 case -NFS4ERR_OLD_STATEID:
953 spin_lock(&inode->i_lock);
954 if (pnfs_layout_is_valid(lo) &&
955 nfs4_stateid_match_other(&data->args.errors[0].stateid,
956 &lo->plh_stateid)) {
957
958 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
959 &data->args.errors[0].stateid))
960 rpc_delay(task, HZ);
961 rpc_restart_call_prepare(task);
962 }
963 spin_unlock(&inode->i_lock);
964 break;
965 case -ENOTSUPP:
966 case -EOPNOTSUPP:
967 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
968 }
969
970 trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
971 task->tk_status);
972}
973
974static void
975nfs42_layouterror_release(void *calldata)
976{
977 struct nfs42_layouterror_data *data = calldata;
978
979 nfs42_free_layouterror_data(data);
980}
981
982static const struct rpc_call_ops nfs42_layouterror_ops = {
983 .rpc_call_prepare = nfs42_layouterror_prepare,
984 .rpc_call_done = nfs42_layouterror_done,
985 .rpc_release = nfs42_layouterror_release,
986};
987
988int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
989 const struct nfs42_layout_error *errors, size_t n)
990{
991 struct inode *inode = lseg->pls_layout->plh_inode;
992 struct nfs42_layouterror_data *data;
993 struct rpc_task *task;
994 struct rpc_message msg = {
995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
996 };
997 struct rpc_task_setup task_setup = {
998 .rpc_message = &msg,
999 .callback_ops = &nfs42_layouterror_ops,
1000 .flags = RPC_TASK_ASYNC,
1001 };
1002 unsigned int i;
1003
1004 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
1005 return -EOPNOTSUPP;
1006 if (n > NFS42_LAYOUTERROR_MAX)
1007 return -EINVAL;
1008 data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
1009 if (!data)
1010 return -ENOMEM;
1011 for (i = 0; i < n; i++) {
1012 data->args.errors[i] = errors[i];
1013 data->args.num_errors++;
1014 data->res.num_errors++;
1015 }
1016 msg.rpc_argp = &data->args;
1017 msg.rpc_resp = &data->res;
1018 task_setup.callback_data = data;
1019 task_setup.rpc_client = NFS_SERVER(inode)->client;
1020 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
1021 task = rpc_run_task(&task_setup);
1022 if (IS_ERR(task))
1023 return PTR_ERR(task);
1024 rpc_put_task(task);
1025 return 0;
1026}
1027EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
1028
1029static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
1030 struct file *dst_f, struct nfs_lock_context *src_lock,
1031 struct nfs_lock_context *dst_lock, loff_t src_offset,
1032 loff_t dst_offset, loff_t count)
1033{
1034 struct inode *src_inode = file_inode(src_f);
1035 struct inode *dst_inode = file_inode(dst_f);
1036 struct nfs_server *server = NFS_SERVER(dst_inode);
1037 struct nfs42_clone_args args = {
1038 .src_fh = NFS_FH(src_inode),
1039 .dst_fh = NFS_FH(dst_inode),
1040 .src_offset = src_offset,
1041 .dst_offset = dst_offset,
1042 .count = count,
1043 .dst_bitmask = server->cache_consistency_bitmask,
1044 };
1045 struct nfs42_clone_res res = {
1046 .server = server,
1047 };
1048 int status;
1049
1050 msg->rpc_argp = &args;
1051 msg->rpc_resp = &res;
1052
1053 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
1054 src_lock, FMODE_READ);
1055 if (status) {
1056 if (status == -EAGAIN)
1057 status = -NFS4ERR_BAD_STATEID;
1058 return status;
1059 }
1060 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
1061 dst_lock, FMODE_WRITE);
1062 if (status) {
1063 if (status == -EAGAIN)
1064 status = -NFS4ERR_BAD_STATEID;
1065 return status;
1066 }
1067
1068 res.dst_fattr = nfs_alloc_fattr();
1069 if (!res.dst_fattr)
1070 return -ENOMEM;
1071
1072 status = nfs4_call_sync(server->client, server, msg,
1073 &args.seq_args, &res.seq_res, 0);
1074 if (status == 0) {
1075 nfs42_copy_dest_done(dst_inode, dst_offset, count);
1076 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
1077 }
1078
1079 kfree(res.dst_fattr);
1080 return status;
1081}
1082
1083int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
1084 loff_t src_offset, loff_t dst_offset, loff_t count)
1085{
1086 struct rpc_message msg = {
1087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
1088 };
1089 struct inode *inode = file_inode(src_f);
1090 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
1091 struct nfs_lock_context *src_lock;
1092 struct nfs_lock_context *dst_lock;
1093 struct nfs4_exception src_exception = { };
1094 struct nfs4_exception dst_exception = { };
1095 int err, err2;
1096
1097 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
1098 return -EOPNOTSUPP;
1099
1100 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
1101 if (IS_ERR(src_lock))
1102 return PTR_ERR(src_lock);
1103
1104 src_exception.inode = file_inode(src_f);
1105 src_exception.state = src_lock->open_context->state;
1106
1107 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
1108 if (IS_ERR(dst_lock)) {
1109 err = PTR_ERR(dst_lock);
1110 goto out_put_src_lock;
1111 }
1112
1113 dst_exception.inode = file_inode(dst_f);
1114 dst_exception.state = dst_lock->open_context->state;
1115
1116 do {
1117 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
1118 src_offset, dst_offset, count);
1119 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
1120 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
1121 err = -EOPNOTSUPP;
1122 break;
1123 }
1124
1125 err2 = nfs4_handle_exception(server, err, &src_exception);
1126 err = nfs4_handle_exception(server, err, &dst_exception);
1127 if (!err)
1128 err = err2;
1129 } while (src_exception.retry || dst_exception.retry);
1130
1131 nfs_put_lock_context(dst_lock);
1132out_put_src_lock:
1133 nfs_put_lock_context(src_lock);
1134 return err;
1135}
1136
1137#define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
1138
1139static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
1140{
1141 struct nfs_server *server = NFS_SERVER(inode);
1142 struct nfs42_removexattrargs args = {
1143 .fh = NFS_FH(inode),
1144 .xattr_name = name,
1145 };
1146 struct nfs42_removexattrres res;
1147 struct rpc_message msg = {
1148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
1149 .rpc_argp = &args,
1150 .rpc_resp = &res,
1151 };
1152 int ret;
1153 unsigned long timestamp = jiffies;
1154
1155 ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
1156 &res.seq_res, 1);
1157 if (!ret)
1158 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1159
1160 return ret;
1161}
1162
1163static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
1164 const void *buf, size_t buflen, int flags)
1165{
1166 struct nfs_server *server = NFS_SERVER(inode);
1167 struct page *pages[NFS4XATTR_MAXPAGES];
1168 struct nfs42_setxattrargs arg = {
1169 .fh = NFS_FH(inode),
1170 .xattr_pages = pages,
1171 .xattr_len = buflen,
1172 .xattr_name = name,
1173 .xattr_flags = flags,
1174 };
1175 struct nfs42_setxattrres res;
1176 struct rpc_message msg = {
1177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
1178 .rpc_argp = &arg,
1179 .rpc_resp = &res,
1180 };
1181 int ret, np;
1182 unsigned long timestamp = jiffies;
1183
1184 if (buflen > server->sxasize)
1185 return -ERANGE;
1186
1187 if (buflen > 0) {
1188 np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
1189 if (np < 0)
1190 return np;
1191 } else
1192 np = 0;
1193
1194 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1195 &res.seq_res, 1);
1196
1197 for (; np > 0; np--)
1198 put_page(pages[np - 1]);
1199
1200 if (!ret)
1201 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1202
1203 return ret;
1204}
1205
1206static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
1207 void *buf, size_t buflen, struct page **pages,
1208 size_t plen)
1209{
1210 struct nfs_server *server = NFS_SERVER(inode);
1211 struct nfs42_getxattrargs arg = {
1212 .fh = NFS_FH(inode),
1213 .xattr_name = name,
1214 };
1215 struct nfs42_getxattrres res;
1216 struct rpc_message msg = {
1217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
1218 .rpc_argp = &arg,
1219 .rpc_resp = &res,
1220 };
1221 ssize_t ret;
1222
1223 arg.xattr_len = plen;
1224 arg.xattr_pages = pages;
1225
1226 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1227 &res.seq_res, 0);
1228 if (ret < 0)
1229 return ret;
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241 nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
1242
1243 if (buflen) {
1244 if (res.xattr_len > buflen)
1245 return -ERANGE;
1246 _copy_from_pages(buf, pages, 0, res.xattr_len);
1247 }
1248
1249 return res.xattr_len;
1250}
1251
1252static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
1253 size_t buflen, u64 *cookiep, bool *eofp)
1254{
1255 struct nfs_server *server = NFS_SERVER(inode);
1256 struct page **pages;
1257 struct nfs42_listxattrsargs arg = {
1258 .fh = NFS_FH(inode),
1259 .cookie = *cookiep,
1260 };
1261 struct nfs42_listxattrsres res = {
1262 .eof = false,
1263 .xattr_buf = buf,
1264 .xattr_len = buflen,
1265 };
1266 struct rpc_message msg = {
1267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
1268 .rpc_argp = &arg,
1269 .rpc_resp = &res,
1270 };
1271 u32 xdrlen;
1272 int ret, np, i;
1273
1274
1275 ret = -ENOMEM;
1276 res.scratch = alloc_page(GFP_KERNEL);
1277 if (!res.scratch)
1278 goto out;
1279
1280 xdrlen = nfs42_listxattr_xdrsize(buflen);
1281 if (xdrlen > server->lxasize)
1282 xdrlen = server->lxasize;
1283 np = xdrlen / PAGE_SIZE + 1;
1284
1285 pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
1286 if (!pages)
1287 goto out_free_scratch;
1288 for (i = 0; i < np; i++) {
1289 pages[i] = alloc_page(GFP_KERNEL);
1290 if (!pages[i])
1291 goto out_free_pages;
1292 }
1293
1294 arg.xattr_pages = pages;
1295 arg.count = xdrlen;
1296
1297 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1298 &res.seq_res, 0);
1299
1300 if (ret >= 0) {
1301 ret = res.copied;
1302 *cookiep = res.cookie;
1303 *eofp = res.eof;
1304 }
1305
1306out_free_pages:
1307 while (--np >= 0) {
1308 if (pages[np])
1309 __free_page(pages[np]);
1310 }
1311 kfree(pages);
1312out_free_scratch:
1313 __free_page(res.scratch);
1314out:
1315 return ret;
1316
1317}
1318
1319ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
1320 void *buf, size_t buflen)
1321{
1322 struct nfs4_exception exception = { };
1323 ssize_t err, np, i;
1324 struct page **pages;
1325
1326 np = nfs_page_array_len(0, buflen ?: XATTR_SIZE_MAX);
1327 pages = kmalloc_array(np, sizeof(*pages), GFP_KERNEL);
1328 if (!pages)
1329 return -ENOMEM;
1330
1331 for (i = 0; i < np; i++) {
1332 pages[i] = alloc_page(GFP_KERNEL);
1333 if (!pages[i]) {
1334 np = i + 1;
1335 err = -ENOMEM;
1336 goto out;
1337 }
1338 }
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348 do {
1349 err = _nfs42_proc_getxattr(inode, name, buf, buflen,
1350 pages, np * PAGE_SIZE);
1351 if (err >= 0)
1352 break;
1353 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1354 &exception);
1355 } while (exception.retry);
1356
1357out:
1358 while (--np >= 0)
1359 __free_page(pages[np]);
1360 kfree(pages);
1361
1362 return err;
1363}
1364
1365int nfs42_proc_setxattr(struct inode *inode, const char *name,
1366 const void *buf, size_t buflen, int flags)
1367{
1368 struct nfs4_exception exception = { };
1369 int err;
1370
1371 do {
1372 err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
1373 if (!err)
1374 break;
1375 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1376 &exception);
1377 } while (exception.retry);
1378
1379 return err;
1380}
1381
1382ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
1383 size_t buflen, u64 *cookiep, bool *eofp)
1384{
1385 struct nfs4_exception exception = { };
1386 ssize_t err;
1387
1388 do {
1389 err = _nfs42_proc_listxattrs(inode, buf, buflen,
1390 cookiep, eofp);
1391 if (err >= 0)
1392 break;
1393 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1394 &exception);
1395 } while (exception.retry);
1396
1397 return err;
1398}
1399
1400int nfs42_proc_removexattr(struct inode *inode, const char *name)
1401{
1402 struct nfs4_exception exception = { };
1403 int err;
1404
1405 do {
1406 err = _nfs42_proc_removexattr(inode, name);
1407 if (!err)
1408 break;
1409 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1410 &exception);
1411 } while (exception.retry);
1412
1413 return err;
1414}
1415
