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 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE])
87 trace_nfs4_fallocate(inode, &args, status);
88 else
89 trace_nfs4_deallocate(inode, &args, status);
90 kfree(res.falloc_fattr);
91 return status;
92}
93
94static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
95 loff_t offset, loff_t len)
96{
97 struct inode *inode = file_inode(filep);
98 struct nfs_server *server = NFS_SERVER(inode);
99 struct nfs4_exception exception = { };
100 struct nfs_lock_context *lock;
101 int err;
102
103 lock = nfs_get_lock_context(nfs_file_open_context(filep));
104 if (IS_ERR(lock))
105 return PTR_ERR(lock);
106
107 exception.inode = inode;
108 exception.state = lock->open_context->state;
109
110 err = nfs_sync_inode(inode);
111 if (err)
112 goto out;
113
114 do {
115 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
116 if (err == -ENOTSUPP) {
117 err = -EOPNOTSUPP;
118 break;
119 }
120 err = nfs4_handle_exception(server, err, &exception);
121 } while (exception.retry);
122out:
123 nfs_put_lock_context(lock);
124 return err;
125}
126
127int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
128{
129 struct rpc_message msg = {
130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
131 };
132 struct inode *inode = file_inode(filep);
133 int err;
134
135 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
136 return -EOPNOTSUPP;
137
138 inode_lock(inode);
139
140 err = nfs42_proc_fallocate(&msg, filep, offset, len);
141 if (err == -EOPNOTSUPP)
142 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
143
144 inode_unlock(inode);
145 return err;
146}
147
148int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
149{
150 struct rpc_message msg = {
151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
152 };
153 struct inode *inode = file_inode(filep);
154 int err;
155
156 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
157 return -EOPNOTSUPP;
158
159 inode_lock(inode);
160
161 err = nfs42_proc_fallocate(&msg, filep, offset, len);
162 if (err == 0)
163 truncate_pagecache_range(inode, offset, (offset + len) -1);
164 if (err == -EOPNOTSUPP)
165 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
166
167 inode_unlock(inode);
168 return err;
169}
170
171static int handle_async_copy(struct nfs42_copy_res *res,
172 struct nfs_server *dst_server,
173 struct nfs_server *src_server,
174 struct file *src,
175 struct file *dst,
176 nfs4_stateid *src_stateid,
177 bool *restart)
178{
179 struct nfs4_copy_state *copy, *tmp_copy;
180 int status = NFS4_OK;
181 bool found_pending = false;
182 struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
183 struct nfs_open_context *src_ctx = nfs_file_open_context(src);
184
185 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
186 if (!copy)
187 return -ENOMEM;
188
189 spin_lock(&dst_server->nfs_client->cl_lock);
190 list_for_each_entry(tmp_copy,
191 &dst_server->nfs_client->pending_cb_stateids,
192 copies) {
193 if (memcmp(&res->write_res.stateid, &tmp_copy->stateid,
194 NFS4_STATEID_SIZE))
195 continue;
196 found_pending = true;
197 list_del(&tmp_copy->copies);
198 break;
199 }
200 if (found_pending) {
201 spin_unlock(&dst_server->nfs_client->cl_lock);
202 kfree(copy);
203 copy = tmp_copy;
204 goto out;
205 }
206
207 memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
208 init_completion(©->completion);
209 copy->parent_dst_state = dst_ctx->state;
210 copy->parent_src_state = src_ctx->state;
211
212 list_add_tail(©->copies, &dst_server->ss_copies);
213 spin_unlock(&dst_server->nfs_client->cl_lock);
214
215 if (dst_server != src_server) {
216 spin_lock(&src_server->nfs_client->cl_lock);
217 list_add_tail(©->src_copies, &src_server->ss_copies);
218 spin_unlock(&src_server->nfs_client->cl_lock);
219 }
220
221 status = wait_for_completion_interruptible(©->completion);
222 spin_lock(&dst_server->nfs_client->cl_lock);
223 list_del_init(©->copies);
224 spin_unlock(&dst_server->nfs_client->cl_lock);
225 if (dst_server != src_server) {
226 spin_lock(&src_server->nfs_client->cl_lock);
227 list_del_init(©->src_copies);
228 spin_unlock(&src_server->nfs_client->cl_lock);
229 }
230 if (status == -ERESTARTSYS) {
231 goto out_cancel;
232 } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
233 status = -EAGAIN;
234 *restart = true;
235 goto out_cancel;
236 }
237out:
238 res->write_res.count = copy->count;
239 memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
240 status = -copy->error;
241
242out_free:
243 kfree(copy);
244 return status;
245out_cancel:
246 nfs42_do_offload_cancel_async(dst, ©->stateid);
247 if (!nfs42_files_from_same_server(src, dst))
248 nfs42_do_offload_cancel_async(src, src_stateid);
249 goto out_free;
250}
251
252static int process_copy_commit(struct file *dst, loff_t pos_dst,
253 struct nfs42_copy_res *res)
254{
255 struct nfs_commitres cres;
256 int status = -ENOMEM;
257
258 cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
259 if (!cres.verf)
260 goto out;
261
262 status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
263 if (status)
264 goto out_free;
265 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
266 &cres.verf->verifier)) {
267 dprintk("commit verf differs from copy verf\n");
268 status = -EAGAIN;
269 }
270out_free:
271 kfree(cres.verf);
272out:
273 return status;
274}
275
276
277
278
279
280
281
282
283
284
285
286
287static void nfs42_copy_dest_done(struct inode *inode, loff_t pos, loff_t len)
288{
289 loff_t newsize = pos + len;
290 loff_t end = newsize - 1;
291
292 WARN_ON_ONCE(invalidate_inode_pages2_range(inode->i_mapping,
293 pos >> PAGE_SHIFT, end >> PAGE_SHIFT));
294
295 spin_lock(&inode->i_lock);
296 if (newsize > i_size_read(inode))
297 i_size_write(inode, newsize);
298 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
299 NFS_INO_INVALID_CTIME |
300 NFS_INO_INVALID_MTIME |
301 NFS_INO_INVALID_BLOCKS);
302 spin_unlock(&inode->i_lock);
303}
304
305static ssize_t _nfs42_proc_copy(struct file *src,
306 struct nfs_lock_context *src_lock,
307 struct file *dst,
308 struct nfs_lock_context *dst_lock,
309 struct nfs42_copy_args *args,
310 struct nfs42_copy_res *res,
311 struct nl4_server *nss,
312 nfs4_stateid *cnr_stateid,
313 bool *restart)
314{
315 struct rpc_message msg = {
316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
317 .rpc_argp = args,
318 .rpc_resp = res,
319 };
320 struct inode *dst_inode = file_inode(dst);
321 struct inode *src_inode = file_inode(src);
322 struct nfs_server *dst_server = NFS_SERVER(dst_inode);
323 struct nfs_server *src_server = NFS_SERVER(src_inode);
324 loff_t pos_src = args->src_pos;
325 loff_t pos_dst = args->dst_pos;
326 size_t count = args->count;
327 ssize_t status;
328
329 if (nss) {
330 args->cp_src = nss;
331 nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
332 } else {
333 status = nfs4_set_rw_stateid(&args->src_stateid,
334 src_lock->open_context, src_lock, FMODE_READ);
335 if (status) {
336 if (status == -EAGAIN)
337 status = -NFS4ERR_BAD_STATEID;
338 return status;
339 }
340 }
341 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
342 pos_src, pos_src + (loff_t)count - 1);
343 if (status)
344 return status;
345
346 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
347 dst_lock, FMODE_WRITE);
348 if (status) {
349 if (status == -EAGAIN)
350 status = -NFS4ERR_BAD_STATEID;
351 return status;
352 }
353
354 status = nfs_sync_inode(dst_inode);
355 if (status)
356 return status;
357
358 res->commit_res.verf = NULL;
359 if (args->sync) {
360 res->commit_res.verf =
361 kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
362 if (!res->commit_res.verf)
363 return -ENOMEM;
364 }
365 set_bit(NFS_CLNT_SRC_SSC_COPY_STATE,
366 &src_lock->open_context->state->flags);
367 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
368 &dst_lock->open_context->state->flags);
369
370 status = nfs4_call_sync(dst_server->client, dst_server, &msg,
371 &args->seq_args, &res->seq_res, 0);
372 trace_nfs4_copy(src_inode, dst_inode, args, res, nss, status);
373 if (status == -ENOTSUPP)
374 dst_server->caps &= ~NFS_CAP_COPY;
375 if (status)
376 goto out;
377
378 if (args->sync &&
379 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
380 &res->commit_res.verf->verifier)) {
381 status = -EAGAIN;
382 goto out;
383 }
384
385 if (!res->synchronous) {
386 status = handle_async_copy(res, dst_server, src_server, src,
387 dst, &args->src_stateid, restart);
388 if (status)
389 goto out;
390 }
391
392 if ((!res->synchronous || !args->sync) &&
393 res->write_res.verifier.committed != NFS_FILE_SYNC) {
394 status = process_copy_commit(dst, pos_dst, res);
395 if (status)
396 goto out;
397 }
398
399 nfs42_copy_dest_done(dst_inode, pos_dst, res->write_res.count);
400 nfs_invalidate_atime(src_inode);
401 status = res->write_res.count;
402out:
403 if (args->sync)
404 kfree(res->commit_res.verf);
405 return status;
406}
407
408ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
409 struct file *dst, loff_t pos_dst, size_t count,
410 struct nl4_server *nss,
411 nfs4_stateid *cnr_stateid, bool sync)
412{
413 struct nfs_server *server = NFS_SERVER(file_inode(dst));
414 struct nfs_lock_context *src_lock;
415 struct nfs_lock_context *dst_lock;
416 struct nfs42_copy_args args = {
417 .src_fh = NFS_FH(file_inode(src)),
418 .src_pos = pos_src,
419 .dst_fh = NFS_FH(file_inode(dst)),
420 .dst_pos = pos_dst,
421 .count = count,
422 .sync = sync,
423 };
424 struct nfs42_copy_res res;
425 struct nfs4_exception src_exception = {
426 .inode = file_inode(src),
427 .stateid = &args.src_stateid,
428 };
429 struct nfs4_exception dst_exception = {
430 .inode = file_inode(dst),
431 .stateid = &args.dst_stateid,
432 };
433 ssize_t err, err2;
434 bool restart = false;
435
436 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
437 if (IS_ERR(src_lock))
438 return PTR_ERR(src_lock);
439
440 src_exception.state = src_lock->open_context->state;
441
442 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
443 if (IS_ERR(dst_lock)) {
444 err = PTR_ERR(dst_lock);
445 goto out_put_src_lock;
446 }
447
448 dst_exception.state = dst_lock->open_context->state;
449
450 do {
451 inode_lock(file_inode(dst));
452 err = _nfs42_proc_copy(src, src_lock,
453 dst, dst_lock,
454 &args, &res,
455 nss, cnr_stateid, &restart);
456 inode_unlock(file_inode(dst));
457
458 if (err >= 0)
459 break;
460 if (err == -ENOTSUPP &&
461 nfs42_files_from_same_server(src, dst)) {
462 err = -EOPNOTSUPP;
463 break;
464 } else if (err == -EAGAIN) {
465 if (!restart) {
466 dst_exception.retry = 1;
467 continue;
468 }
469 break;
470 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
471 args.sync = true;
472 dst_exception.retry = 1;
473 continue;
474 } else if ((err == -ESTALE ||
475 err == -NFS4ERR_OFFLOAD_DENIED ||
476 err == -ENOTSUPP) &&
477 !nfs42_files_from_same_server(src, dst)) {
478 nfs42_do_offload_cancel_async(src, &args.src_stateid);
479 err = -EOPNOTSUPP;
480 break;
481 }
482
483 err2 = nfs4_handle_exception(server, err, &src_exception);
484 err = nfs4_handle_exception(server, err, &dst_exception);
485 if (!err)
486 err = err2;
487 } while (src_exception.retry || dst_exception.retry);
488
489 nfs_put_lock_context(dst_lock);
490out_put_src_lock:
491 nfs_put_lock_context(src_lock);
492 return err;
493}
494
495struct nfs42_offloadcancel_data {
496 struct nfs_server *seq_server;
497 struct nfs42_offload_status_args args;
498 struct nfs42_offload_status_res res;
499};
500
501static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
502{
503 struct nfs42_offloadcancel_data *data = calldata;
504
505 nfs4_setup_sequence(data->seq_server->nfs_client,
506 &data->args.osa_seq_args,
507 &data->res.osr_seq_res, task);
508}
509
510static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
511{
512 struct nfs42_offloadcancel_data *data = calldata;
513
514 trace_nfs4_offload_cancel(&data->args, task->tk_status);
515 nfs41_sequence_done(task, &data->res.osr_seq_res);
516 if (task->tk_status &&
517 nfs4_async_handle_error(task, data->seq_server, NULL,
518 NULL) == -EAGAIN)
519 rpc_restart_call_prepare(task);
520}
521
522static void nfs42_free_offloadcancel_data(void *data)
523{
524 kfree(data);
525}
526
527static const struct rpc_call_ops nfs42_offload_cancel_ops = {
528 .rpc_call_prepare = nfs42_offload_cancel_prepare,
529 .rpc_call_done = nfs42_offload_cancel_done,
530 .rpc_release = nfs42_free_offloadcancel_data,
531};
532
533static int nfs42_do_offload_cancel_async(struct file *dst,
534 nfs4_stateid *stateid)
535{
536 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
537 struct nfs42_offloadcancel_data *data = NULL;
538 struct nfs_open_context *ctx = nfs_file_open_context(dst);
539 struct rpc_task *task;
540 struct rpc_message msg = {
541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
542 .rpc_cred = ctx->cred,
543 };
544 struct rpc_task_setup task_setup_data = {
545 .rpc_client = dst_server->client,
546 .rpc_message = &msg,
547 .callback_ops = &nfs42_offload_cancel_ops,
548 .workqueue = nfsiod_workqueue,
549 .flags = RPC_TASK_ASYNC,
550 };
551 int status;
552
553 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
554 return -EOPNOTSUPP;
555
556 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
557 if (data == NULL)
558 return -ENOMEM;
559
560 data->seq_server = dst_server;
561 data->args.osa_src_fh = NFS_FH(file_inode(dst));
562 memcpy(&data->args.osa_stateid, stateid,
563 sizeof(data->args.osa_stateid));
564 msg.rpc_argp = &data->args;
565 msg.rpc_resp = &data->res;
566 task_setup_data.callback_data = data;
567 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
568 1, 0);
569 task = rpc_run_task(&task_setup_data);
570 if (IS_ERR(task))
571 return PTR_ERR(task);
572 status = rpc_wait_for_completion_task(task);
573 if (status == -ENOTSUPP)
574 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
575 rpc_put_task(task);
576 return status;
577}
578
579static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
580 struct nfs42_copy_notify_args *args,
581 struct nfs42_copy_notify_res *res)
582{
583 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
584 struct rpc_message msg = {
585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
586 .rpc_argp = args,
587 .rpc_resp = res,
588 };
589 int status;
590 struct nfs_open_context *ctx;
591 struct nfs_lock_context *l_ctx;
592
593 ctx = get_nfs_open_context(nfs_file_open_context(src));
594 l_ctx = nfs_get_lock_context(ctx);
595 if (IS_ERR(l_ctx))
596 return PTR_ERR(l_ctx);
597
598 status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
599 FMODE_READ);
600 nfs_put_lock_context(l_ctx);
601 if (status) {
602 if (status == -EAGAIN)
603 status = -NFS4ERR_BAD_STATEID;
604 return status;
605 }
606
607 status = nfs4_call_sync(src_server->client, src_server, &msg,
608 &args->cna_seq_args, &res->cnr_seq_res, 0);
609 trace_nfs4_copy_notify(file_inode(src), args, res, status);
610 if (status == -ENOTSUPP)
611 src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
612
613 put_nfs_open_context(nfs_file_open_context(src));
614 return status;
615}
616
617int nfs42_proc_copy_notify(struct file *src, struct file *dst,
618 struct nfs42_copy_notify_res *res)
619{
620 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
621 struct nfs42_copy_notify_args *args;
622 struct nfs4_exception exception = {
623 .inode = file_inode(src),
624 };
625 int status;
626
627 if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
628 return -EOPNOTSUPP;
629
630 args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_NOFS);
631 if (args == NULL)
632 return -ENOMEM;
633
634 args->cna_src_fh = NFS_FH(file_inode(src)),
635 args->cna_dst.nl4_type = NL4_NETADDR;
636 nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
637 exception.stateid = &args->cna_src_stateid;
638
639 do {
640 status = _nfs42_proc_copy_notify(src, dst, args, res);
641 if (status == -ENOTSUPP) {
642 status = -EOPNOTSUPP;
643 goto out;
644 }
645 status = nfs4_handle_exception(src_server, status, &exception);
646 } while (exception.retry);
647
648out:
649 kfree(args);
650 return status;
651}
652
653static loff_t _nfs42_proc_llseek(struct file *filep,
654 struct nfs_lock_context *lock, loff_t offset, int whence)
655{
656 struct inode *inode = file_inode(filep);
657 struct nfs42_seek_args args = {
658 .sa_fh = NFS_FH(inode),
659 .sa_offset = offset,
660 .sa_what = (whence == SEEK_HOLE) ?
661 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
662 };
663 struct nfs42_seek_res res;
664 struct rpc_message msg = {
665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
666 .rpc_argp = &args,
667 .rpc_resp = &res,
668 };
669 struct nfs_server *server = NFS_SERVER(inode);
670 int status;
671
672 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
673 return -ENOTSUPP;
674
675 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
676 lock, FMODE_READ);
677 if (status) {
678 if (status == -EAGAIN)
679 status = -NFS4ERR_BAD_STATEID;
680 return status;
681 }
682
683 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
684 offset, LLONG_MAX);
685 if (status)
686 return status;
687
688 status = nfs4_call_sync(server->client, server, &msg,
689 &args.seq_args, &res.seq_res, 0);
690 trace_nfs4_llseek(inode, &args, &res, status);
691 if (status == -ENOTSUPP)
692 server->caps &= ~NFS_CAP_SEEK;
693 if (status)
694 return status;
695
696 if (whence == SEEK_DATA && res.sr_eof)
697 return -NFS4ERR_NXIO;
698 else
699 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
700}
701
702loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
703{
704 struct nfs_server *server = NFS_SERVER(file_inode(filep));
705 struct nfs4_exception exception = { };
706 struct nfs_lock_context *lock;
707 loff_t err;
708
709 lock = nfs_get_lock_context(nfs_file_open_context(filep));
710 if (IS_ERR(lock))
711 return PTR_ERR(lock);
712
713 exception.inode = file_inode(filep);
714 exception.state = lock->open_context->state;
715
716 do {
717 err = _nfs42_proc_llseek(filep, lock, offset, whence);
718 if (err >= 0)
719 break;
720 if (err == -ENOTSUPP) {
721 err = -EOPNOTSUPP;
722 break;
723 }
724 err = nfs4_handle_exception(server, err, &exception);
725 } while (exception.retry);
726
727 nfs_put_lock_context(lock);
728 return err;
729}
730
731
732static void
733nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
734{
735 struct nfs42_layoutstat_data *data = calldata;
736 struct inode *inode = data->inode;
737 struct nfs_server *server = NFS_SERVER(inode);
738 struct pnfs_layout_hdr *lo;
739
740 spin_lock(&inode->i_lock);
741 lo = NFS_I(inode)->layout;
742 if (!pnfs_layout_is_valid(lo)) {
743 spin_unlock(&inode->i_lock);
744 rpc_exit(task, 0);
745 return;
746 }
747 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
748 spin_unlock(&inode->i_lock);
749 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
750 &data->res.seq_res, task);
751}
752
753static void
754nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
755{
756 struct nfs42_layoutstat_data *data = calldata;
757 struct inode *inode = data->inode;
758 struct pnfs_layout_hdr *lo;
759
760 if (!nfs4_sequence_done(task, &data->res.seq_res))
761 return;
762
763 switch (task->tk_status) {
764 case 0:
765 return;
766 case -NFS4ERR_BADHANDLE:
767 case -ESTALE:
768 pnfs_destroy_layout(NFS_I(inode));
769 break;
770 case -NFS4ERR_EXPIRED:
771 case -NFS4ERR_ADMIN_REVOKED:
772 case -NFS4ERR_DELEG_REVOKED:
773 case -NFS4ERR_STALE_STATEID:
774 case -NFS4ERR_BAD_STATEID:
775 spin_lock(&inode->i_lock);
776 lo = NFS_I(inode)->layout;
777 if (pnfs_layout_is_valid(lo) &&
778 nfs4_stateid_match(&data->args.stateid,
779 &lo->plh_stateid)) {
780 LIST_HEAD(head);
781
782
783
784
785
786 pnfs_mark_layout_stateid_invalid(lo, &head);
787 spin_unlock(&inode->i_lock);
788 pnfs_free_lseg_list(&head);
789 nfs_commit_inode(inode, 0);
790 } else
791 spin_unlock(&inode->i_lock);
792 break;
793 case -NFS4ERR_OLD_STATEID:
794 spin_lock(&inode->i_lock);
795 lo = NFS_I(inode)->layout;
796 if (pnfs_layout_is_valid(lo) &&
797 nfs4_stateid_match_other(&data->args.stateid,
798 &lo->plh_stateid)) {
799
800 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
801 &data->args.stateid))
802 rpc_delay(task, HZ);
803 rpc_restart_call_prepare(task);
804 }
805 spin_unlock(&inode->i_lock);
806 break;
807 case -ENOTSUPP:
808 case -EOPNOTSUPP:
809 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
810 }
811
812 trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
813}
814
815static void
816nfs42_layoutstat_release(void *calldata)
817{
818 struct nfs42_layoutstat_data *data = calldata;
819 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
820 int i;
821
822 for (i = 0; i < data->args.num_dev; i++) {
823 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
824 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
825 }
826
827 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
828 smp_mb__before_atomic();
829 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
830 smp_mb__after_atomic();
831 nfs_iput_and_deactive(data->inode);
832 kfree(data->args.devinfo);
833 kfree(data);
834}
835
836static const struct rpc_call_ops nfs42_layoutstat_ops = {
837 .rpc_call_prepare = nfs42_layoutstat_prepare,
838 .rpc_call_done = nfs42_layoutstat_done,
839 .rpc_release = nfs42_layoutstat_release,
840};
841
842int nfs42_proc_layoutstats_generic(struct nfs_server *server,
843 struct nfs42_layoutstat_data *data)
844{
845 struct rpc_message msg = {
846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
847 .rpc_argp = &data->args,
848 .rpc_resp = &data->res,
849 };
850 struct rpc_task_setup task_setup = {
851 .rpc_client = server->client,
852 .rpc_message = &msg,
853 .callback_ops = &nfs42_layoutstat_ops,
854 .callback_data = data,
855 .flags = RPC_TASK_ASYNC,
856 };
857 struct rpc_task *task;
858
859 data->inode = nfs_igrab_and_active(data->args.inode);
860 if (!data->inode) {
861 nfs42_layoutstat_release(data);
862 return -EAGAIN;
863 }
864 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
865 task = rpc_run_task(&task_setup);
866 if (IS_ERR(task))
867 return PTR_ERR(task);
868 rpc_put_task(task);
869 return 0;
870}
871
872static struct nfs42_layouterror_data *
873nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
874{
875 struct nfs42_layouterror_data *data;
876 struct inode *inode = lseg->pls_layout->plh_inode;
877
878 data = kzalloc(sizeof(*data), gfp_flags);
879 if (data) {
880 data->args.inode = data->inode = nfs_igrab_and_active(inode);
881 if (data->inode) {
882 data->lseg = pnfs_get_lseg(lseg);
883 if (data->lseg)
884 return data;
885 nfs_iput_and_deactive(data->inode);
886 }
887 kfree(data);
888 }
889 return NULL;
890}
891
892static void
893nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
894{
895 pnfs_put_lseg(data->lseg);
896 nfs_iput_and_deactive(data->inode);
897 kfree(data);
898}
899
900static void
901nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
902{
903 struct nfs42_layouterror_data *data = calldata;
904 struct inode *inode = data->inode;
905 struct nfs_server *server = NFS_SERVER(inode);
906 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
907 unsigned i;
908
909 spin_lock(&inode->i_lock);
910 if (!pnfs_layout_is_valid(lo)) {
911 spin_unlock(&inode->i_lock);
912 rpc_exit(task, 0);
913 return;
914 }
915 for (i = 0; i < data->args.num_errors; i++)
916 nfs4_stateid_copy(&data->args.errors[i].stateid,
917 &lo->plh_stateid);
918 spin_unlock(&inode->i_lock);
919 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
920 &data->res.seq_res, task);
921}
922
923static void
924nfs42_layouterror_done(struct rpc_task *task, void *calldata)
925{
926 struct nfs42_layouterror_data *data = calldata;
927 struct inode *inode = data->inode;
928 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
929
930 if (!nfs4_sequence_done(task, &data->res.seq_res))
931 return;
932
933 switch (task->tk_status) {
934 case 0:
935 return;
936 case -NFS4ERR_BADHANDLE:
937 case -ESTALE:
938 pnfs_destroy_layout(NFS_I(inode));
939 break;
940 case -NFS4ERR_EXPIRED:
941 case -NFS4ERR_ADMIN_REVOKED:
942 case -NFS4ERR_DELEG_REVOKED:
943 case -NFS4ERR_STALE_STATEID:
944 case -NFS4ERR_BAD_STATEID:
945 spin_lock(&inode->i_lock);
946 if (pnfs_layout_is_valid(lo) &&
947 nfs4_stateid_match(&data->args.errors[0].stateid,
948 &lo->plh_stateid)) {
949 LIST_HEAD(head);
950
951
952
953
954
955 pnfs_mark_layout_stateid_invalid(lo, &head);
956 spin_unlock(&inode->i_lock);
957 pnfs_free_lseg_list(&head);
958 nfs_commit_inode(inode, 0);
959 } else
960 spin_unlock(&inode->i_lock);
961 break;
962 case -NFS4ERR_OLD_STATEID:
963 spin_lock(&inode->i_lock);
964 if (pnfs_layout_is_valid(lo) &&
965 nfs4_stateid_match_other(&data->args.errors[0].stateid,
966 &lo->plh_stateid)) {
967
968 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
969 &data->args.errors[0].stateid))
970 rpc_delay(task, HZ);
971 rpc_restart_call_prepare(task);
972 }
973 spin_unlock(&inode->i_lock);
974 break;
975 case -ENOTSUPP:
976 case -EOPNOTSUPP:
977 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
978 }
979
980 trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
981 task->tk_status);
982}
983
984static void
985nfs42_layouterror_release(void *calldata)
986{
987 struct nfs42_layouterror_data *data = calldata;
988
989 nfs42_free_layouterror_data(data);
990}
991
992static const struct rpc_call_ops nfs42_layouterror_ops = {
993 .rpc_call_prepare = nfs42_layouterror_prepare,
994 .rpc_call_done = nfs42_layouterror_done,
995 .rpc_release = nfs42_layouterror_release,
996};
997
998int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
999 const struct nfs42_layout_error *errors, size_t n)
1000{
1001 struct inode *inode = lseg->pls_layout->plh_inode;
1002 struct nfs42_layouterror_data *data;
1003 struct rpc_task *task;
1004 struct rpc_message msg = {
1005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
1006 };
1007 struct rpc_task_setup task_setup = {
1008 .rpc_message = &msg,
1009 .callback_ops = &nfs42_layouterror_ops,
1010 .flags = RPC_TASK_ASYNC,
1011 };
1012 unsigned int i;
1013
1014 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
1015 return -EOPNOTSUPP;
1016 if (n > NFS42_LAYOUTERROR_MAX)
1017 return -EINVAL;
1018 data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
1019 if (!data)
1020 return -ENOMEM;
1021 for (i = 0; i < n; i++) {
1022 data->args.errors[i] = errors[i];
1023 data->args.num_errors++;
1024 data->res.num_errors++;
1025 }
1026 msg.rpc_argp = &data->args;
1027 msg.rpc_resp = &data->res;
1028 task_setup.callback_data = data;
1029 task_setup.rpc_client = NFS_SERVER(inode)->client;
1030 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
1031 task = rpc_run_task(&task_setup);
1032 if (IS_ERR(task))
1033 return PTR_ERR(task);
1034 rpc_put_task(task);
1035 return 0;
1036}
1037EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
1038
1039static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
1040 struct file *dst_f, struct nfs_lock_context *src_lock,
1041 struct nfs_lock_context *dst_lock, loff_t src_offset,
1042 loff_t dst_offset, loff_t count)
1043{
1044 struct inode *src_inode = file_inode(src_f);
1045 struct inode *dst_inode = file_inode(dst_f);
1046 struct nfs_server *server = NFS_SERVER(dst_inode);
1047 struct nfs42_clone_args args = {
1048 .src_fh = NFS_FH(src_inode),
1049 .dst_fh = NFS_FH(dst_inode),
1050 .src_offset = src_offset,
1051 .dst_offset = dst_offset,
1052 .count = count,
1053 .dst_bitmask = server->cache_consistency_bitmask,
1054 };
1055 struct nfs42_clone_res res = {
1056 .server = server,
1057 };
1058 int status;
1059
1060 msg->rpc_argp = &args;
1061 msg->rpc_resp = &res;
1062
1063 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
1064 src_lock, FMODE_READ);
1065 if (status) {
1066 if (status == -EAGAIN)
1067 status = -NFS4ERR_BAD_STATEID;
1068 return status;
1069 }
1070 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
1071 dst_lock, FMODE_WRITE);
1072 if (status) {
1073 if (status == -EAGAIN)
1074 status = -NFS4ERR_BAD_STATEID;
1075 return status;
1076 }
1077
1078 res.dst_fattr = nfs_alloc_fattr();
1079 if (!res.dst_fattr)
1080 return -ENOMEM;
1081
1082 status = nfs4_call_sync(server->client, server, msg,
1083 &args.seq_args, &res.seq_res, 0);
1084 trace_nfs4_clone(src_inode, dst_inode, &args, status);
1085 if (status == 0) {
1086 nfs42_copy_dest_done(dst_inode, dst_offset, count);
1087 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
1088 }
1089
1090 kfree(res.dst_fattr);
1091 return status;
1092}
1093
1094int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
1095 loff_t src_offset, loff_t dst_offset, loff_t count)
1096{
1097 struct rpc_message msg = {
1098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
1099 };
1100 struct inode *inode = file_inode(src_f);
1101 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
1102 struct nfs_lock_context *src_lock;
1103 struct nfs_lock_context *dst_lock;
1104 struct nfs4_exception src_exception = { };
1105 struct nfs4_exception dst_exception = { };
1106 int err, err2;
1107
1108 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
1109 return -EOPNOTSUPP;
1110
1111 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
1112 if (IS_ERR(src_lock))
1113 return PTR_ERR(src_lock);
1114
1115 src_exception.inode = file_inode(src_f);
1116 src_exception.state = src_lock->open_context->state;
1117
1118 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
1119 if (IS_ERR(dst_lock)) {
1120 err = PTR_ERR(dst_lock);
1121 goto out_put_src_lock;
1122 }
1123
1124 dst_exception.inode = file_inode(dst_f);
1125 dst_exception.state = dst_lock->open_context->state;
1126
1127 do {
1128 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
1129 src_offset, dst_offset, count);
1130 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
1131 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
1132 err = -EOPNOTSUPP;
1133 break;
1134 }
1135
1136 err2 = nfs4_handle_exception(server, err, &src_exception);
1137 err = nfs4_handle_exception(server, err, &dst_exception);
1138 if (!err)
1139 err = err2;
1140 } while (src_exception.retry || dst_exception.retry);
1141
1142 nfs_put_lock_context(dst_lock);
1143out_put_src_lock:
1144 nfs_put_lock_context(src_lock);
1145 return err;
1146}
1147
1148#define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
1149
1150static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
1151{
1152 struct nfs_server *server = NFS_SERVER(inode);
1153 struct nfs42_removexattrargs args = {
1154 .fh = NFS_FH(inode),
1155 .xattr_name = name,
1156 };
1157 struct nfs42_removexattrres res;
1158 struct rpc_message msg = {
1159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
1160 .rpc_argp = &args,
1161 .rpc_resp = &res,
1162 };
1163 int ret;
1164 unsigned long timestamp = jiffies;
1165
1166 ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
1167 &res.seq_res, 1);
1168 if (!ret)
1169 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1170
1171 return ret;
1172}
1173
1174static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
1175 const void *buf, size_t buflen, int flags)
1176{
1177 struct nfs_server *server = NFS_SERVER(inode);
1178 struct page *pages[NFS4XATTR_MAXPAGES];
1179 struct nfs42_setxattrargs arg = {
1180 .fh = NFS_FH(inode),
1181 .xattr_pages = pages,
1182 .xattr_len = buflen,
1183 .xattr_name = name,
1184 .xattr_flags = flags,
1185 };
1186 struct nfs42_setxattrres res;
1187 struct rpc_message msg = {
1188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
1189 .rpc_argp = &arg,
1190 .rpc_resp = &res,
1191 };
1192 int ret, np;
1193 unsigned long timestamp = jiffies;
1194
1195 if (buflen > server->sxasize)
1196 return -ERANGE;
1197
1198 if (buflen > 0) {
1199 np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
1200 if (np < 0)
1201 return np;
1202 } else
1203 np = 0;
1204
1205 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1206 &res.seq_res, 1);
1207
1208 for (; np > 0; np--)
1209 put_page(pages[np - 1]);
1210
1211 if (!ret)
1212 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1213
1214 return ret;
1215}
1216
1217static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
1218 void *buf, size_t buflen, struct page **pages,
1219 size_t plen)
1220{
1221 struct nfs_server *server = NFS_SERVER(inode);
1222 struct nfs42_getxattrargs arg = {
1223 .fh = NFS_FH(inode),
1224 .xattr_name = name,
1225 };
1226 struct nfs42_getxattrres res;
1227 struct rpc_message msg = {
1228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
1229 .rpc_argp = &arg,
1230 .rpc_resp = &res,
1231 };
1232 ssize_t ret;
1233
1234 arg.xattr_len = plen;
1235 arg.xattr_pages = pages;
1236
1237 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1238 &res.seq_res, 0);
1239 if (ret < 0)
1240 return ret;
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252 nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
1253
1254 if (buflen) {
1255 if (res.xattr_len > buflen)
1256 return -ERANGE;
1257 _copy_from_pages(buf, pages, 0, res.xattr_len);
1258 }
1259
1260 return res.xattr_len;
1261}
1262
1263static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
1264 size_t buflen, u64 *cookiep, bool *eofp)
1265{
1266 struct nfs_server *server = NFS_SERVER(inode);
1267 struct page **pages;
1268 struct nfs42_listxattrsargs arg = {
1269 .fh = NFS_FH(inode),
1270 .cookie = *cookiep,
1271 };
1272 struct nfs42_listxattrsres res = {
1273 .eof = false,
1274 .xattr_buf = buf,
1275 .xattr_len = buflen,
1276 };
1277 struct rpc_message msg = {
1278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
1279 .rpc_argp = &arg,
1280 .rpc_resp = &res,
1281 };
1282 u32 xdrlen;
1283 int ret, np, i;
1284
1285
1286 ret = -ENOMEM;
1287 res.scratch = alloc_page(GFP_KERNEL);
1288 if (!res.scratch)
1289 goto out;
1290
1291 xdrlen = nfs42_listxattr_xdrsize(buflen);
1292 if (xdrlen > server->lxasize)
1293 xdrlen = server->lxasize;
1294 np = xdrlen / PAGE_SIZE + 1;
1295
1296 pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
1297 if (!pages)
1298 goto out_free_scratch;
1299 for (i = 0; i < np; i++) {
1300 pages[i] = alloc_page(GFP_KERNEL);
1301 if (!pages[i])
1302 goto out_free_pages;
1303 }
1304
1305 arg.xattr_pages = pages;
1306 arg.count = xdrlen;
1307
1308 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1309 &res.seq_res, 0);
1310
1311 if (ret >= 0) {
1312 ret = res.copied;
1313 *cookiep = res.cookie;
1314 *eofp = res.eof;
1315 }
1316
1317out_free_pages:
1318 while (--np >= 0) {
1319 if (pages[np])
1320 __free_page(pages[np]);
1321 }
1322 kfree(pages);
1323out_free_scratch:
1324 __free_page(res.scratch);
1325out:
1326 return ret;
1327
1328}
1329
1330ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
1331 void *buf, size_t buflen)
1332{
1333 struct nfs4_exception exception = { };
1334 ssize_t err, np, i;
1335 struct page **pages;
1336
1337 np = nfs_page_array_len(0, buflen ?: XATTR_SIZE_MAX);
1338 pages = kmalloc_array(np, sizeof(*pages), GFP_KERNEL);
1339 if (!pages)
1340 return -ENOMEM;
1341
1342 for (i = 0; i < np; i++) {
1343 pages[i] = alloc_page(GFP_KERNEL);
1344 if (!pages[i]) {
1345 np = i + 1;
1346 err = -ENOMEM;
1347 goto out;
1348 }
1349 }
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359 do {
1360 err = _nfs42_proc_getxattr(inode, name, buf, buflen,
1361 pages, np * PAGE_SIZE);
1362 if (err >= 0)
1363 break;
1364 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1365 &exception);
1366 } while (exception.retry);
1367
1368out:
1369 while (--np >= 0)
1370 __free_page(pages[np]);
1371 kfree(pages);
1372
1373 return err;
1374}
1375
1376int nfs42_proc_setxattr(struct inode *inode, const char *name,
1377 const void *buf, size_t buflen, int flags)
1378{
1379 struct nfs4_exception exception = { };
1380 int err;
1381
1382 do {
1383 err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
1384 if (!err)
1385 break;
1386 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1387 &exception);
1388 } while (exception.retry);
1389
1390 return err;
1391}
1392
1393ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
1394 size_t buflen, u64 *cookiep, bool *eofp)
1395{
1396 struct nfs4_exception exception = { };
1397 ssize_t err;
1398
1399 do {
1400 err = _nfs42_proc_listxattrs(inode, buf, buflen,
1401 cookiep, eofp);
1402 if (err >= 0)
1403 break;
1404 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1405 &exception);
1406 } while (exception.retry);
1407
1408 return err;
1409}
1410
1411int nfs42_proc_removexattr(struct inode *inode, const char *name)
1412{
1413 struct nfs4_exception exception = { };
1414 int err;
1415
1416 do {
1417 err = _nfs42_proc_removexattr(inode, name);
1418 if (!err)
1419 break;
1420 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1421 &exception);
1422 } while (exception.retry);
1423
1424 return err;
1425}
1426
