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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux.git] / fs / nfs / nfs42proc.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
1c6dcbe5
AS		 2/*
3 * Copyright (c) 2014 Anna Schumaker <[email protected]>
4 */
5#include <linux/fs.h>
6#include <linux/sunrpc/sched.h>
7#include <linux/nfs.h>
8#include <linux/nfs3.h>
9#include <linux/nfs4.h>
10#include <linux/nfs_xdr.h>
11#include <linux/nfs_fs.h>
12#include "nfs4_fs.h"
13#include "nfs42.h"
1b4a4bd8
PT		 14#include "iostat.h"
15#include "pnfs.h"
efc6f4aa 16#include "nfs4session.h"
1b4a4bd8
PT		 17#include "internal.h"
18
291e1b94 19#define NFSDBG_FACILITY NFSDBG_PROC
c975c209 20static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
1c6dcbe5 21
f4ac1674 22static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
4bdf87eb 23 struct nfs_lock_context *lock, loff_t offset, loff_t len)
f4ac1674
AS		 24{
25 struct inode *inode = file_inode(filep);
9a51940b 26 struct nfs_server *server = NFS_SERVER(inode);
f4ac1674
AS		 27 struct nfs42_falloc_args args = {
28 .falloc_fh = NFS_FH(inode),
29 .falloc_offset = offset,
30 .falloc_length = len,
9a51940b
AS		 31 .falloc_bitmask = server->cache_consistency_bitmask,
32 };
33 struct nfs42_falloc_res res = {
34 .falloc_server = server,
f4ac1674 35 };
f4ac1674
AS		 36 int status;
37
38 msg->rpc_argp = &args;
39 msg->rpc_resp = &res;
40
4bdf87eb
CH		 41 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
42 lock, FMODE_WRITE);
f4ac1674
AS		 43 if (status)
44 return status;
45
9a51940b
AS		 46 res.falloc_fattr = nfs_alloc_fattr();
47 if (!res.falloc_fattr)
48 return -ENOMEM;
49
50 status = nfs4_call_sync(server->client, server, msg,
51 &args.seq_args, &res.seq_res, 0);
52 if (status == 0)
53 status = nfs_post_op_update_inode(inode, res.falloc_fattr);
54
55 kfree(res.falloc_fattr);
56 return status;
f4ac1674
AS		 57}
58
59static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
60 loff_t offset, loff_t len)
61{
62 struct nfs_server *server = NFS_SERVER(file_inode(filep));
63 struct nfs4_exception exception = { };
4bdf87eb 64 struct nfs_lock_context *lock;
f4ac1674
AS		 65 int err;
66
4bdf87eb
CH		 67 lock = nfs_get_lock_context(nfs_file_open_context(filep));
68 if (IS_ERR(lock))
69 return PTR_ERR(lock);
70
71 exception.inode = file_inode(filep);
72 exception.state = lock->open_context->state;
73
f4ac1674 74 do {
4bdf87eb
CH		 75 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
76 if (err == -ENOTSUPP) {
77 err = -EOPNOTSUPP;
78 break;
79 }
f4ac1674
AS		 80 err = nfs4_handle_exception(server, err, &exception);
81 } while (exception.retry);
82
4bdf87eb 83 nfs_put_lock_context(lock);
f4ac1674
AS		 84 return err;
85}
86
87int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
88{
89 struct rpc_message msg = {
90 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
91 };
92 struct inode *inode = file_inode(filep);
93 int err;
94
95 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
96 return -EOPNOTSUPP;
97
5955102c 98 inode_lock(inode);
f830f7dd 99
f4ac1674
AS		 100 err = nfs42_proc_fallocate(&msg, filep, offset, len);
101 if (err == -EOPNOTSUPP)
102 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
f830f7dd 103
5955102c 104 inode_unlock(inode);
f4ac1674
AS		 105 return err;
106}
107
624bd5b7
AS		 108int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
109{
110 struct rpc_message msg = {
111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
112 };
113 struct inode *inode = file_inode(filep);
114 int err;
115
116 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
117 return -EOPNOTSUPP;
118
5955102c 119 inode_lock(inode);
1e564d3d
TM		 120 err = nfs_sync_inode(inode);
121 if (err)
122 goto out_unlock;
f830f7dd 123
624bd5b7 124 err = nfs42_proc_fallocate(&msg, filep, offset, len);
9a51940b
AS		 125 if (err == 0)
126 truncate_pagecache_range(inode, offset, (offset + len) -1);
624bd5b7
AS		 127 if (err == -EOPNOTSUPP)
128 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
1e564d3d 129out_unlock:
5955102c 130 inode_unlock(inode);
624bd5b7
AS		 131 return err;
132}
133
62164f31
OK		 134static int handle_async_copy(struct nfs42_copy_res *res,
135 struct nfs_server *server,
136 struct file *src,
137 struct file *dst,
138 nfs4_stateid *src_stateid)
139{
99f2c555 140 struct nfs4_copy_state *copy, *tmp_copy;
62164f31 141 int status = NFS4_OK;
bc0c9079 142 bool found_pending = false;
e4648aa4 143 struct nfs_open_context *ctx = nfs_file_open_context(dst);
bc0c9079 144
99f2c555
OK		 145 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
146 if (!copy)
147 return -ENOMEM;
148
bc0c9079 149 spin_lock(&server->nfs_client->cl_lock);
99f2c555 150 list_for_each_entry(tmp_copy, &server->nfs_client->pending_cb_stateids,
bc0c9079 151 copies) {
99f2c555 152 if (memcmp(&res->write_res.stateid, &tmp_copy->stateid,
bc0c9079
OK		 153 NFS4_STATEID_SIZE))
154 continue;
155 found_pending = true;
99f2c555 156 list_del(&tmp_copy->copies);
bc0c9079
OK		 157 break;
158 }
159 if (found_pending) {
160 spin_unlock(&server->nfs_client->cl_lock);
99f2c555
OK		 161 kfree(copy);
162 copy = tmp_copy;
bc0c9079
OK		 163 goto out;
164 }
62164f31 165
62164f31
OK		 166 memcpy(&copy->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
167 init_completion(&copy->completion);
e4648aa4 168 copy->parent_state = ctx->state;
62164f31 169
62164f31
OK		 170 list_add_tail(&copy->copies, &server->ss_copies);
171 spin_unlock(&server->nfs_client->cl_lock);
172
c975c209 173 status = wait_for_completion_interruptible(&copy->completion);
62164f31
OK		 174 spin_lock(&server->nfs_client->cl_lock);
175 list_del_init(&copy->copies);
176 spin_unlock(&server->nfs_client->cl_lock);
c975c209 177 if (status == -ERESTARTSYS) {
e4648aa4
OK		 178 goto out_cancel;
179 } else if (copy->flags) {
180 status = -EAGAIN;
181 goto out_cancel;
c975c209 182 }
bc0c9079 183out:
62164f31
OK		 184 res->write_res.count = copy->count;
185 memcpy(&res->write_res.verifier, &copy->verf, sizeof(copy->verf));
186 status = -copy->error;
187
e4648aa4
OK		 188 kfree(copy);
189 return status;
190out_cancel:
191 nfs42_do_offload_cancel_async(dst, &copy->stateid);
62164f31
OK		 192 kfree(copy);
193 return status;
194}
195
6b8d84e2
OK		 196static int process_copy_commit(struct file *dst, loff_t pos_dst,
197 struct nfs42_copy_res *res)
198{
199 struct nfs_commitres cres;
200 int status = -ENOMEM;
201
202 cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
203 if (!cres.verf)
204 goto out;
205
206 status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
207 if (status)
208 goto out_free;
209 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
210 &cres.verf->verifier)) {
211 dprintk("commit verf differs from copy verf\n");
212 status = -EAGAIN;
213 }
214out_free:
215 kfree(cres.verf);
216out:
217 return status;
218}
219
9d8cacbf 220static ssize_t _nfs42_proc_copy(struct file *src,
2e72448b 221 struct nfs_lock_context *src_lock,
9d8cacbf 222 struct file *dst,
2e72448b 223 struct nfs_lock_context *dst_lock,
9d8cacbf
TM		 224 struct nfs42_copy_args *args,
225 struct nfs42_copy_res *res)
2e72448b 226{
2e72448b
AS		 227 struct rpc_message msg = {
228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
9d8cacbf
TM		 229 .rpc_argp = args,
230 .rpc_resp = res,
2e72448b
AS		 231 };
232 struct inode *dst_inode = file_inode(dst);
233 struct nfs_server *server = NFS_SERVER(dst_inode);
9d8cacbf
TM		 234 loff_t pos_src = args->src_pos;
235 loff_t pos_dst = args->dst_pos;
236 size_t count = args->count;
1ee48bdd 237 ssize_t status;
2e72448b 238
9d8cacbf 239 status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context,
2e72448b
AS		 240 src_lock, FMODE_READ);
241 if (status)
242 return status;
243
837bb1d7
TM		 244 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
245 pos_src, pos_src + (loff_t)count - 1);
246 if (status)
247 return status;
248
9d8cacbf 249 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
2e72448b
AS		 250 dst_lock, FMODE_WRITE);
251 if (status)
252 return status;
837bb1d7
TM		 253
254 status = nfs_sync_inode(dst_inode);
255 if (status)
256 return status;
2e72448b 257
62164f31
OK		 258 res->commit_res.verf = NULL;
259 if (args->sync) {
260 res->commit_res.verf =
261 kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
262 if (!res->commit_res.verf)
263 return -ENOMEM;
264 }
e4648aa4
OK		 265 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
266 &dst_lock->open_context->state->flags);
267
2e72448b 268 status = nfs4_call_sync(server->client, server, &msg,
9d8cacbf 269 &args->seq_args, &res->seq_res, 0);
2e72448b
AS		 270 if (status == -ENOTSUPP)
271 server->caps &= ~NFS_CAP_COPY;
272 if (status)
e0926934 273 goto out;
2e72448b 274
62164f31
OK		 275 if (args->sync &&
276 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
e0926934
OK		 277 &res->commit_res.verf->verifier)) {
278 status = -EAGAIN;
279 goto out;
2e72448b
AS		 280 }
281
62164f31
OK		 282 if (!res->synchronous) {
283 status = handle_async_copy(res, server, src, dst,
284 &args->src_stateid);
285 if (status)
286 return status;
287 }
288
6b8d84e2
OK		 289 if ((!res->synchronous || !args->sync) &&
290 res->write_res.verifier.committed != NFS_FILE_SYNC) {
291 status = process_copy_commit(dst, pos_dst, res);
292 if (status)
293 return status;
294 }
295
2e72448b 296 truncate_pagecache_range(dst_inode, pos_dst,
9d8cacbf 297 pos_dst + res->write_res.count);
2e72448b 298
e0926934
OK		 299 status = res->write_res.count;
300out:
62164f31
OK		 301 if (args->sync)
302 kfree(res->commit_res.verf);
e0926934 303 return status;
2e72448b
AS		 304}
305
306ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
307 struct file *dst, loff_t pos_dst,
308 size_t count)
309{
310 struct nfs_server *server = NFS_SERVER(file_inode(dst));
311 struct nfs_lock_context *src_lock;
312 struct nfs_lock_context *dst_lock;
9d8cacbf
TM		 313 struct nfs42_copy_args args = {
314 .src_fh = NFS_FH(file_inode(src)),
315 .src_pos = pos_src,
316 .dst_fh = NFS_FH(file_inode(dst)),
317 .dst_pos = pos_dst,
318 .count = count,
62164f31 319 .sync = false,
9d8cacbf
TM		 320 };
321 struct nfs42_copy_res res;
322 struct nfs4_exception src_exception = {
323 .inode = file_inode(src),
324 .stateid = &args.src_stateid,
325 };
326 struct nfs4_exception dst_exception = {
327 .inode = file_inode(dst),
328 .stateid = &args.dst_stateid,
329 };
2e72448b
AS		 330 ssize_t err, err2;
331
332 if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
333 return -EOPNOTSUPP;
334
335 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
336 if (IS_ERR(src_lock))
337 return PTR_ERR(src_lock);
338
2e72448b
AS		 339 src_exception.state = src_lock->open_context->state;
340
341 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
342 if (IS_ERR(dst_lock)) {
343 err = PTR_ERR(dst_lock);
344 goto out_put_src_lock;
345 }
346
2e72448b
AS		 347 dst_exception.state = dst_lock->open_context->state;
348
349 do {
ea8ea737 350 inode_lock(file_inode(dst));
9d8cacbf
TM		 351 err = _nfs42_proc_copy(src, src_lock,
352 dst, dst_lock,
353 &args, &res);
ea8ea737 354 inode_unlock(file_inode(dst));
2e72448b 355
9d8cacbf
TM		 356 if (err >= 0)
357 break;
2e72448b
AS		 358 if (err == -ENOTSUPP) {
359 err = -EOPNOTSUPP;
360 break;
539f57b3
OK		 361 } else if (err == -EAGAIN) {
362 dst_exception.retry = 1;
363 continue;
364 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
365 args.sync = true;
e0926934
OK		 366 dst_exception.retry = 1;
367 continue;
2e72448b
AS		 368 }
369
370 err2 = nfs4_handle_exception(server, err, &src_exception);
371 err = nfs4_handle_exception(server, err, &dst_exception);
372 if (!err)
373 err = err2;
374 } while (src_exception.retry || dst_exception.retry);
375
376 nfs_put_lock_context(dst_lock);
377out_put_src_lock:
378 nfs_put_lock_context(src_lock);
379 return err;
380}
381
c975c209
OK		 382struct nfs42_offloadcancel_data {
383 struct nfs_server *seq_server;
384 struct nfs42_offload_status_args args;
385 struct nfs42_offload_status_res res;
386};
387
388static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
389{
390 struct nfs42_offloadcancel_data *data = calldata;
391
392 nfs4_setup_sequence(data->seq_server->nfs_client,
393 &data->args.osa_seq_args,
394 &data->res.osr_seq_res, task);
395}
396
397static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
398{
399 struct nfs42_offloadcancel_data *data = calldata;
400
401 nfs41_sequence_done(task, &data->res.osr_seq_res);
402 if (task->tk_status &&
403 nfs4_async_handle_error(task, data->seq_server, NULL,
404 NULL) == -EAGAIN)
405 rpc_restart_call_prepare(task);
406}
407
408static void nfs42_free_offloadcancel_data(void *data)
409{
410 kfree(data);
411}
412
413static const struct rpc_call_ops nfs42_offload_cancel_ops = {
414 .rpc_call_prepare = nfs42_offload_cancel_prepare,
415 .rpc_call_done = nfs42_offload_cancel_done,
416 .rpc_release = nfs42_free_offloadcancel_data,
417};
418
419static int nfs42_do_offload_cancel_async(struct file *dst,
420 nfs4_stateid *stateid)
421{
422 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
423 struct nfs42_offloadcancel_data *data = NULL;
424 struct nfs_open_context *ctx = nfs_file_open_context(dst);
425 struct rpc_task *task;
426 struct rpc_message msg = {
427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
428 .rpc_cred = ctx->cred,
429 };
430 struct rpc_task_setup task_setup_data = {
431 .rpc_client = dst_server->client,
432 .rpc_message = &msg,
433 .callback_ops = &nfs42_offload_cancel_ops,
434 .workqueue = nfsiod_workqueue,
435 .flags = RPC_TASK_ASYNC,
436 };
437 int status;
438
439 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
440 return -EOPNOTSUPP;
441
442 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
443 if (data == NULL)
444 return -ENOMEM;
445
446 data->seq_server = dst_server;
447 data->args.osa_src_fh = NFS_FH(file_inode(dst));
448 memcpy(&data->args.osa_stateid, stateid,
449 sizeof(data->args.osa_stateid));
450 msg.rpc_argp = &data->args;
451 msg.rpc_resp = &data->res;
452 task_setup_data.callback_data = data;
453 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
454 1, 0);
455 task = rpc_run_task(&task_setup_data);
456 if (IS_ERR(task))
457 return PTR_ERR(task);
458 status = rpc_wait_for_completion_task(task);
459 if (status == -ENOTSUPP)
460 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
461 rpc_put_task(task);
462 return status;
463}
464
4bdf87eb
CH		 465static loff_t _nfs42_proc_llseek(struct file *filep,
466 struct nfs_lock_context *lock, loff_t offset, int whence)
1c6dcbe5
AS		 467{
468 struct inode *inode = file_inode(filep);
469 struct nfs42_seek_args args = {
470 .sa_fh = NFS_FH(inode),
471 .sa_offset = offset,
472 .sa_what = (whence == SEEK_HOLE) ?
473 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
474 };
475 struct nfs42_seek_res res;
476 struct rpc_message msg = {
477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
478 .rpc_argp = &args,
479 .rpc_resp = &res,
480 };
481 struct nfs_server *server = NFS_SERVER(inode);
482 int status;
483
878ffa9f 484 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
1c6dcbe5
AS		 485 return -ENOTSUPP;
486
4bdf87eb
CH		 487 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
488 lock, FMODE_READ);
1c6dcbe5
AS		 489 if (status)
490 return status;
491
e95fc4a0
TM		 492 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
493 offset, LLONG_MAX);
494 if (status)
495 return status;
496
1c6dcbe5
AS		 497 status = nfs4_call_sync(server->client, server, &msg,
498 &args.seq_args, &res.seq_res, 0);
499 if (status == -ENOTSUPP)
500 server->caps &= ~NFS_CAP_SEEK;
501 if (status)
502 return status;
503
504 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
505}
be3a5d23 506
bdcc2cd1
BF		 507loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
508{
509 struct nfs_server *server = NFS_SERVER(file_inode(filep));
510 struct nfs4_exception exception = { };
4bdf87eb 511 struct nfs_lock_context *lock;
306a5549 512 loff_t err;
bdcc2cd1 513
4bdf87eb
CH		 514 lock = nfs_get_lock_context(nfs_file_open_context(filep));
515 if (IS_ERR(lock))
516 return PTR_ERR(lock);
517
518 exception.inode = file_inode(filep);
519 exception.state = lock->open_context->state;
520
bdcc2cd1 521 do {
4bdf87eb 522 err = _nfs42_proc_llseek(filep, lock, offset, whence);
306a5549
BF		 523 if (err >= 0)
524 break;
4bdf87eb
CH		 525 if (err == -ENOTSUPP) {
526 err = -EOPNOTSUPP;
527 break;
528 }
bdcc2cd1
BF		 529 err = nfs4_handle_exception(server, err, &exception);
530 } while (exception.retry);
531
4bdf87eb 532 nfs_put_lock_context(lock);
bdcc2cd1
BF		 533 return err;
534}
535
536
1b4a4bd8
PT		 537static void
538nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
539{
540 struct nfs42_layoutstat_data *data = calldata;
9a0fe867
TM		 541 struct inode *inode = data->inode;
542 struct nfs_server *server = NFS_SERVER(inode);
543 struct pnfs_layout_hdr *lo;
1b4a4bd8 544
9a0fe867
TM		 545 spin_lock(&inode->i_lock);
546 lo = NFS_I(inode)->layout;
547 if (!pnfs_layout_is_valid(lo)) {
548 spin_unlock(&inode->i_lock);
549 rpc_exit(task, 0);
550 return;
551 }
552 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
553 spin_unlock(&inode->i_lock);
6de7e12f
AS		 554 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
555 &data->res.seq_res, task);
1b4a4bd8
PT		 556}
557
558static void
559nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
560{
561 struct nfs42_layoutstat_data *data = calldata;
68d264cf
PT		 562 struct inode *inode = data->inode;
563 struct pnfs_layout_hdr *lo;
1b4a4bd8
PT		 564
565 if (!nfs4_sequence_done(task, &data->res.seq_res))
566 return;
567
6c5a0d89
TM		 568 switch (task->tk_status) {
569 case 0:
570 break;
cf61eb26
TM		 571 case -NFS4ERR_BADHANDLE:
572 case -ESTALE:
573 pnfs_destroy_layout(NFS_I(inode));
574 break;
68d264cf 575 case -NFS4ERR_EXPIRED:
206b3bb5
TM		 576 case -NFS4ERR_ADMIN_REVOKED:
577 case -NFS4ERR_DELEG_REVOKED:
68d264cf 578 case -NFS4ERR_STALE_STATEID:
68d264cf
PT		 579 case -NFS4ERR_BAD_STATEID:
580 spin_lock(&inode->i_lock);
581 lo = NFS_I(inode)->layout;
9a0fe867
TM		 582 if (pnfs_layout_is_valid(lo) &&
583 nfs4_stateid_match(&data->args.stateid,
68d264cf
PT		 584 &lo->plh_stateid)) {
585 LIST_HEAD(head);
586
587 /*
588 * Mark the bad layout state as invalid, then retry
589 * with the current stateid.
590 */
5f46be04 591 pnfs_mark_layout_stateid_invalid(lo, &head);
68d264cf
PT		 592 spin_unlock(&inode->i_lock);
593 pnfs_free_lseg_list(&head);
1f18b82c 594 nfs_commit_inode(inode, 0);
68d264cf
PT		 595 } else
596 spin_unlock(&inode->i_lock);
597 break;
9a0fe867
TM		 598 case -NFS4ERR_OLD_STATEID:
599 spin_lock(&inode->i_lock);
600 lo = NFS_I(inode)->layout;
601 if (pnfs_layout_is_valid(lo) &&
602 nfs4_stateid_match_other(&data->args.stateid,
603 &lo->plh_stateid)) {
604 /* Do we need to delay before resending? */
605 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
606 &data->args.stateid))
607 rpc_delay(task, HZ);
608 rpc_restart_call_prepare(task);
609 }
610 spin_unlock(&inode->i_lock);
611 break;
6c5a0d89
TM		 612 case -ENOTSUPP:
613 case -EOPNOTSUPP:
68d264cf 614 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
6c5a0d89 615 }
1b4a4bd8
PT		 616}
617
618static void
619nfs42_layoutstat_release(void *calldata)
620{
621 struct nfs42_layoutstat_data *data = calldata;
422c93c8
TM		 622 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
623 int i;
8733408d 624
422c93c8
TM		 625 for (i = 0; i < data->args.num_dev; i++) {
626 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
627 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
628 }
1b4a4bd8
PT		 629
630 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
1bfe3b25
PT		 631 smp_mb__before_atomic();
632 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
633 smp_mb__after_atomic();
1b4a4bd8
PT		 634 nfs_iput_and_deactive(data->inode);
635 kfree(data->args.devinfo);
636 kfree(data);
637}
638
be3a5d23 639static const struct rpc_call_ops nfs42_layoutstat_ops = {
1b4a4bd8
PT		 640 .rpc_call_prepare = nfs42_layoutstat_prepare,
641 .rpc_call_done = nfs42_layoutstat_done,
642 .rpc_release = nfs42_layoutstat_release,
be3a5d23
TM		 643};
644
645int nfs42_proc_layoutstats_generic(struct nfs_server *server,
646 struct nfs42_layoutstat_data *data)
647{
648 struct rpc_message msg = {
649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
650 .rpc_argp = &data->args,
651 .rpc_resp = &data->res,
652 };
653 struct rpc_task_setup task_setup = {
654 .rpc_client = server->client,
655 .rpc_message = &msg,
656 .callback_ops = &nfs42_layoutstat_ops,
657 .callback_data = data,
658 .flags = RPC_TASK_ASYNC,
659 };
660 struct rpc_task *task;
661
1b4a4bd8
PT		 662 data->inode = nfs_igrab_and_active(data->args.inode);
663 if (!data->inode) {
664 nfs42_layoutstat_release(data);
665 return -EAGAIN;
666 }
fba83f34 667 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
be3a5d23
TM		 668 task = rpc_run_task(&task_setup);
669 if (IS_ERR(task))
670 return PTR_ERR(task);
3f807e5a 671 rpc_put_task(task);
be3a5d23
TM		 672 return 0;
673}
e5341f3a
PT		 674
675static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
4bdf87eb
CH		 676 struct file *dst_f, struct nfs_lock_context *src_lock,
677 struct nfs_lock_context *dst_lock, loff_t src_offset,
678 loff_t dst_offset, loff_t count)
e5341f3a
PT		 679{
680 struct inode *src_inode = file_inode(src_f);
681 struct inode *dst_inode = file_inode(dst_f);
682 struct nfs_server *server = NFS_SERVER(dst_inode);
683 struct nfs42_clone_args args = {
684 .src_fh = NFS_FH(src_inode),
685 .dst_fh = NFS_FH(dst_inode),
686 .src_offset = src_offset,
687 .dst_offset = dst_offset,
9494b2ce 688 .count = count,
e5341f3a
PT		 689 .dst_bitmask = server->cache_consistency_bitmask,
690 };
691 struct nfs42_clone_res res = {
692 .server = server,
693 };
694 int status;
695
696 msg->rpc_argp = &args;
697 msg->rpc_resp = &res;
698
4bdf87eb
CH		 699 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
700 src_lock, FMODE_READ);
e5341f3a
PT		 701 if (status)
702 return status;
703
4bdf87eb
CH		 704 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
705 dst_lock, FMODE_WRITE);
e5341f3a
PT		 706 if (status)
707 return status;
708
709 res.dst_fattr = nfs_alloc_fattr();
710 if (!res.dst_fattr)
711 return -ENOMEM;
712
713 status = nfs4_call_sync(server->client, server, msg,
714 &args.seq_args, &res.seq_res, 0);
715 if (status == 0)
716 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
717
718 kfree(res.dst_fattr);
719 return status;
720}
721
722int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
723 loff_t src_offset, loff_t dst_offset, loff_t count)
724{
725 struct rpc_message msg = {
726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
727 };
728 struct inode *inode = file_inode(src_f);
729 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
4bdf87eb
CH		 730 struct nfs_lock_context *src_lock;
731 struct nfs_lock_context *dst_lock;
732 struct nfs4_exception src_exception = { };
733 struct nfs4_exception dst_exception = { };
734 int err, err2;
e5341f3a
PT		 735
736 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
737 return -EOPNOTSUPP;
738
4bdf87eb
CH		 739 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
740 if (IS_ERR(src_lock))
741 return PTR_ERR(src_lock);
742
743 src_exception.inode = file_inode(src_f);
744 src_exception.state = src_lock->open_context->state;
745
746 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
747 if (IS_ERR(dst_lock)) {
748 err = PTR_ERR(dst_lock);
749 goto out_put_src_lock;
750 }
751
752 dst_exception.inode = file_inode(dst_f);
753 dst_exception.state = dst_lock->open_context->state;
754
e5341f3a 755 do {
4bdf87eb
CH		 756 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
757 src_offset, dst_offset, count);
e5341f3a
PT		 758 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
759 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
4bdf87eb
CH		 760 err = -EOPNOTSUPP;
761 break;
e5341f3a 762 }
e5341f3a 763
4bdf87eb
CH		 764 err2 = nfs4_handle_exception(server, err, &src_exception);
765 err = nfs4_handle_exception(server, err, &dst_exception);
766 if (!err)
767 err = err2;
768 } while (src_exception.retry || dst_exception.retry);
e5341f3a 769
4bdf87eb
CH		 770 nfs_put_lock_context(dst_lock);
771out_put_src_lock:
772 nfs_put_lock_context(src_lock);
773 return err;
e5341f3a 774}
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