This source file includes following definitions.
- _nfs42_proc_fallocate
- nfs42_proc_fallocate
- nfs42_proc_allocate
- nfs42_proc_deallocate
- handle_async_copy
- process_copy_commit
- _nfs42_proc_copy
- nfs42_proc_copy
- nfs42_offload_cancel_prepare
- nfs42_offload_cancel_done
- nfs42_free_offloadcancel_data
- nfs42_do_offload_cancel_async
- _nfs42_proc_llseek
- nfs42_proc_llseek
- nfs42_layoutstat_prepare
- nfs42_layoutstat_done
- nfs42_layoutstat_release
- nfs42_proc_layoutstats_generic
- nfs42_alloc_layouterror_data
- nfs42_free_layouterror_data
- nfs42_layouterror_prepare
- nfs42_layouterror_done
- nfs42_layouterror_release
- nfs42_proc_layouterror
- _nfs42_proc_clone
- nfs42_proc_clone
1
2
3
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"
14 #include "iostat.h"
15 #include "pnfs.h"
16 #include "nfs4session.h"
17 #include "internal.h"
18
19 #define NFSDBG_FACILITY NFSDBG_PROC
20 static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
21
22 static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
23 struct nfs_lock_context *lock, loff_t offset, loff_t len)
24 {
25 struct inode *inode = file_inode(filep);
26 struct nfs_server *server = NFS_SERVER(inode);
27 struct nfs42_falloc_args args = {
28 .falloc_fh = NFS_FH(inode),
29 .falloc_offset = offset,
30 .falloc_length = len,
31 .falloc_bitmask = server->cache_consistency_bitmask,
32 };
33 struct nfs42_falloc_res res = {
34 .falloc_server = server,
35 };
36 int status;
37
38 msg->rpc_argp = &args;
39 msg->rpc_resp = &res;
40
41 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
42 lock, FMODE_WRITE);
43 if (status)
44 return status;
45
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;
57 }
58
59 static 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 = { };
64 struct nfs_lock_context *lock;
65 int err;
66
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
74 do {
75 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
76 if (err == -ENOTSUPP) {
77 err = -EOPNOTSUPP;
78 break;
79 }
80 err = nfs4_handle_exception(server, err, &exception);
81 } while (exception.retry);
82
83 nfs_put_lock_context(lock);
84 return err;
85 }
86
87 int 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
98 inode_lock(inode);
99
100 err = nfs42_proc_fallocate(&msg, filep, offset, len);
101 if (err == -EOPNOTSUPP)
102 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
103
104 inode_unlock(inode);
105 return err;
106 }
107
108 int 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
119 inode_lock(inode);
120 err = nfs_sync_inode(inode);
121 if (err)
122 goto out_unlock;
123
124 err = nfs42_proc_fallocate(&msg, filep, offset, len);
125 if (err == 0)
126 truncate_pagecache_range(inode, offset, (offset + len) -1);
127 if (err == -EOPNOTSUPP)
128 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
129 out_unlock:
130 inode_unlock(inode);
131 return err;
132 }
133
134 static 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 {
140 struct nfs4_copy_state *copy, *tmp_copy;
141 int status = NFS4_OK;
142 bool found_pending = false;
143 struct nfs_open_context *ctx = nfs_file_open_context(dst);
144
145 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
146 if (!copy)
147 return -ENOMEM;
148
149 spin_lock(&server->nfs_client->cl_lock);
150 list_for_each_entry(tmp_copy, &server->nfs_client->pending_cb_stateids,
151 copies) {
152 if (memcmp(&res->write_res.stateid, &tmp_copy->stateid,
153 NFS4_STATEID_SIZE))
154 continue;
155 found_pending = true;
156 list_del(&tmp_copy->copies);
157 break;
158 }
159 if (found_pending) {
160 spin_unlock(&server->nfs_client->cl_lock);
161 kfree(copy);
162 copy = tmp_copy;
163 goto out;
164 }
165
166 memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
167 init_completion(©->completion);
168 copy->parent_state = ctx->state;
169
170 list_add_tail(©->copies, &server->ss_copies);
171 spin_unlock(&server->nfs_client->cl_lock);
172
173 status = wait_for_completion_interruptible(©->completion);
174 spin_lock(&server->nfs_client->cl_lock);
175 list_del_init(©->copies);
176 spin_unlock(&server->nfs_client->cl_lock);
177 if (status == -ERESTARTSYS) {
178 goto out_cancel;
179 } else if (copy->flags) {
180 status = -EAGAIN;
181 goto out_cancel;
182 }
183 out:
184 res->write_res.count = copy->count;
185 memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
186 status = -copy->error;
187
188 kfree(copy);
189 return status;
190 out_cancel:
191 nfs42_do_offload_cancel_async(dst, ©->stateid);
192 kfree(copy);
193 return status;
194 }
195
196 static 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 }
214 out_free:
215 kfree(cres.verf);
216 out:
217 return status;
218 }
219
220 static ssize_t _nfs42_proc_copy(struct file *src,
221 struct nfs_lock_context *src_lock,
222 struct file *dst,
223 struct nfs_lock_context *dst_lock,
224 struct nfs42_copy_args *args,
225 struct nfs42_copy_res *res)
226 {
227 struct rpc_message msg = {
228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
229 .rpc_argp = args,
230 .rpc_resp = res,
231 };
232 struct inode *dst_inode = file_inode(dst);
233 struct nfs_server *server = NFS_SERVER(dst_inode);
234 loff_t pos_src = args->src_pos;
235 loff_t pos_dst = args->dst_pos;
236 size_t count = args->count;
237 ssize_t status;
238
239 status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context,
240 src_lock, FMODE_READ);
241 if (status)
242 return status;
243
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
249 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
250 dst_lock, FMODE_WRITE);
251 if (status)
252 return status;
253
254 status = nfs_sync_inode(dst_inode);
255 if (status)
256 return status;
257
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 }
265 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
266 &dst_lock->open_context->state->flags);
267
268 status = nfs4_call_sync(server->client, server, &msg,
269 &args->seq_args, &res->seq_res, 0);
270 if (status == -ENOTSUPP)
271 server->caps &= ~NFS_CAP_COPY;
272 if (status)
273 goto out;
274
275 if (args->sync &&
276 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
277 &res->commit_res.verf->verifier)) {
278 status = -EAGAIN;
279 goto out;
280 }
281
282 if (!res->synchronous) {
283 status = handle_async_copy(res, server, src, dst,
284 &args->src_stateid);
285 if (status)
286 goto out;
287 }
288
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 goto out;
294 }
295
296 truncate_pagecache_range(dst_inode, pos_dst,
297 pos_dst + res->write_res.count);
298
299 status = res->write_res.count;
300 out:
301 if (args->sync)
302 kfree(res->commit_res.verf);
303 return status;
304 }
305
306 ssize_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;
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,
319 .sync = false,
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 };
330 ssize_t err, err2;
331
332 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
333 if (IS_ERR(src_lock))
334 return PTR_ERR(src_lock);
335
336 src_exception.state = src_lock->open_context->state;
337
338 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
339 if (IS_ERR(dst_lock)) {
340 err = PTR_ERR(dst_lock);
341 goto out_put_src_lock;
342 }
343
344 dst_exception.state = dst_lock->open_context->state;
345
346 do {
347 inode_lock(file_inode(dst));
348 err = _nfs42_proc_copy(src, src_lock,
349 dst, dst_lock,
350 &args, &res);
351 inode_unlock(file_inode(dst));
352
353 if (err >= 0)
354 break;
355 if (err == -ENOTSUPP) {
356 err = -EOPNOTSUPP;
357 break;
358 } else if (err == -EAGAIN) {
359 dst_exception.retry = 1;
360 continue;
361 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
362 args.sync = true;
363 dst_exception.retry = 1;
364 continue;
365 }
366
367 err2 = nfs4_handle_exception(server, err, &src_exception);
368 err = nfs4_handle_exception(server, err, &dst_exception);
369 if (!err)
370 err = err2;
371 } while (src_exception.retry || dst_exception.retry);
372
373 nfs_put_lock_context(dst_lock);
374 out_put_src_lock:
375 nfs_put_lock_context(src_lock);
376 return err;
377 }
378
379 struct nfs42_offloadcancel_data {
380 struct nfs_server *seq_server;
381 struct nfs42_offload_status_args args;
382 struct nfs42_offload_status_res res;
383 };
384
385 static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
386 {
387 struct nfs42_offloadcancel_data *data = calldata;
388
389 nfs4_setup_sequence(data->seq_server->nfs_client,
390 &data->args.osa_seq_args,
391 &data->res.osr_seq_res, task);
392 }
393
394 static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
395 {
396 struct nfs42_offloadcancel_data *data = calldata;
397
398 nfs41_sequence_done(task, &data->res.osr_seq_res);
399 if (task->tk_status &&
400 nfs4_async_handle_error(task, data->seq_server, NULL,
401 NULL) == -EAGAIN)
402 rpc_restart_call_prepare(task);
403 }
404
405 static void nfs42_free_offloadcancel_data(void *data)
406 {
407 kfree(data);
408 }
409
410 static const struct rpc_call_ops nfs42_offload_cancel_ops = {
411 .rpc_call_prepare = nfs42_offload_cancel_prepare,
412 .rpc_call_done = nfs42_offload_cancel_done,
413 .rpc_release = nfs42_free_offloadcancel_data,
414 };
415
416 static int nfs42_do_offload_cancel_async(struct file *dst,
417 nfs4_stateid *stateid)
418 {
419 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
420 struct nfs42_offloadcancel_data *data = NULL;
421 struct nfs_open_context *ctx = nfs_file_open_context(dst);
422 struct rpc_task *task;
423 struct rpc_message msg = {
424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
425 .rpc_cred = ctx->cred,
426 };
427 struct rpc_task_setup task_setup_data = {
428 .rpc_client = dst_server->client,
429 .rpc_message = &msg,
430 .callback_ops = &nfs42_offload_cancel_ops,
431 .workqueue = nfsiod_workqueue,
432 .flags = RPC_TASK_ASYNC,
433 };
434 int status;
435
436 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
437 return -EOPNOTSUPP;
438
439 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
440 if (data == NULL)
441 return -ENOMEM;
442
443 data->seq_server = dst_server;
444 data->args.osa_src_fh = NFS_FH(file_inode(dst));
445 memcpy(&data->args.osa_stateid, stateid,
446 sizeof(data->args.osa_stateid));
447 msg.rpc_argp = &data->args;
448 msg.rpc_resp = &data->res;
449 task_setup_data.callback_data = data;
450 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
451 1, 0);
452 task = rpc_run_task(&task_setup_data);
453 if (IS_ERR(task))
454 return PTR_ERR(task);
455 status = rpc_wait_for_completion_task(task);
456 if (status == -ENOTSUPP)
457 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
458 rpc_put_task(task);
459 return status;
460 }
461
462 static loff_t _nfs42_proc_llseek(struct file *filep,
463 struct nfs_lock_context *lock, loff_t offset, int whence)
464 {
465 struct inode *inode = file_inode(filep);
466 struct nfs42_seek_args args = {
467 .sa_fh = NFS_FH(inode),
468 .sa_offset = offset,
469 .sa_what = (whence == SEEK_HOLE) ?
470 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
471 };
472 struct nfs42_seek_res res;
473 struct rpc_message msg = {
474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
475 .rpc_argp = &args,
476 .rpc_resp = &res,
477 };
478 struct nfs_server *server = NFS_SERVER(inode);
479 int status;
480
481 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
482 return -ENOTSUPP;
483
484 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
485 lock, FMODE_READ);
486 if (status)
487 return status;
488
489 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
490 offset, LLONG_MAX);
491 if (status)
492 return status;
493
494 status = nfs4_call_sync(server->client, server, &msg,
495 &args.seq_args, &res.seq_res, 0);
496 if (status == -ENOTSUPP)
497 server->caps &= ~NFS_CAP_SEEK;
498 if (status)
499 return status;
500
501 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
502 }
503
504 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
505 {
506 struct nfs_server *server = NFS_SERVER(file_inode(filep));
507 struct nfs4_exception exception = { };
508 struct nfs_lock_context *lock;
509 loff_t err;
510
511 lock = nfs_get_lock_context(nfs_file_open_context(filep));
512 if (IS_ERR(lock))
513 return PTR_ERR(lock);
514
515 exception.inode = file_inode(filep);
516 exception.state = lock->open_context->state;
517
518 do {
519 err = _nfs42_proc_llseek(filep, lock, offset, whence);
520 if (err >= 0)
521 break;
522 if (err == -ENOTSUPP) {
523 err = -EOPNOTSUPP;
524 break;
525 }
526 err = nfs4_handle_exception(server, err, &exception);
527 } while (exception.retry);
528
529 nfs_put_lock_context(lock);
530 return err;
531 }
532
533
534 static void
535 nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
536 {
537 struct nfs42_layoutstat_data *data = calldata;
538 struct inode *inode = data->inode;
539 struct nfs_server *server = NFS_SERVER(inode);
540 struct pnfs_layout_hdr *lo;
541
542 spin_lock(&inode->i_lock);
543 lo = NFS_I(inode)->layout;
544 if (!pnfs_layout_is_valid(lo)) {
545 spin_unlock(&inode->i_lock);
546 rpc_exit(task, 0);
547 return;
548 }
549 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
550 spin_unlock(&inode->i_lock);
551 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
552 &data->res.seq_res, task);
553 }
554
555 static void
556 nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
557 {
558 struct nfs42_layoutstat_data *data = calldata;
559 struct inode *inode = data->inode;
560 struct pnfs_layout_hdr *lo;
561
562 if (!nfs4_sequence_done(task, &data->res.seq_res))
563 return;
564
565 switch (task->tk_status) {
566 case 0:
567 break;
568 case -NFS4ERR_BADHANDLE:
569 case -ESTALE:
570 pnfs_destroy_layout(NFS_I(inode));
571 break;
572 case -NFS4ERR_EXPIRED:
573 case -NFS4ERR_ADMIN_REVOKED:
574 case -NFS4ERR_DELEG_REVOKED:
575 case -NFS4ERR_STALE_STATEID:
576 case -NFS4ERR_BAD_STATEID:
577 spin_lock(&inode->i_lock);
578 lo = NFS_I(inode)->layout;
579 if (pnfs_layout_is_valid(lo) &&
580 nfs4_stateid_match(&data->args.stateid,
581 &lo->plh_stateid)) {
582 LIST_HEAD(head);
583
584
585
586
587
588 pnfs_mark_layout_stateid_invalid(lo, &head);
589 spin_unlock(&inode->i_lock);
590 pnfs_free_lseg_list(&head);
591 nfs_commit_inode(inode, 0);
592 } else
593 spin_unlock(&inode->i_lock);
594 break;
595 case -NFS4ERR_OLD_STATEID:
596 spin_lock(&inode->i_lock);
597 lo = NFS_I(inode)->layout;
598 if (pnfs_layout_is_valid(lo) &&
599 nfs4_stateid_match_other(&data->args.stateid,
600 &lo->plh_stateid)) {
601
602 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
603 &data->args.stateid))
604 rpc_delay(task, HZ);
605 rpc_restart_call_prepare(task);
606 }
607 spin_unlock(&inode->i_lock);
608 break;
609 case -ENOTSUPP:
610 case -EOPNOTSUPP:
611 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
612 }
613 }
614
615 static void
616 nfs42_layoutstat_release(void *calldata)
617 {
618 struct nfs42_layoutstat_data *data = calldata;
619 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
620 int i;
621
622 for (i = 0; i < data->args.num_dev; i++) {
623 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
624 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
625 }
626
627 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
628 smp_mb__before_atomic();
629 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
630 smp_mb__after_atomic();
631 nfs_iput_and_deactive(data->inode);
632 kfree(data->args.devinfo);
633 kfree(data);
634 }
635
636 static const struct rpc_call_ops nfs42_layoutstat_ops = {
637 .rpc_call_prepare = nfs42_layoutstat_prepare,
638 .rpc_call_done = nfs42_layoutstat_done,
639 .rpc_release = nfs42_layoutstat_release,
640 };
641
642 int nfs42_proc_layoutstats_generic(struct nfs_server *server,
643 struct nfs42_layoutstat_data *data)
644 {
645 struct rpc_message msg = {
646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
647 .rpc_argp = &data->args,
648 .rpc_resp = &data->res,
649 };
650 struct rpc_task_setup task_setup = {
651 .rpc_client = server->client,
652 .rpc_message = &msg,
653 .callback_ops = &nfs42_layoutstat_ops,
654 .callback_data = data,
655 .flags = RPC_TASK_ASYNC,
656 };
657 struct rpc_task *task;
658
659 data->inode = nfs_igrab_and_active(data->args.inode);
660 if (!data->inode) {
661 nfs42_layoutstat_release(data);
662 return -EAGAIN;
663 }
664 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
665 task = rpc_run_task(&task_setup);
666 if (IS_ERR(task))
667 return PTR_ERR(task);
668 rpc_put_task(task);
669 return 0;
670 }
671
672 static struct nfs42_layouterror_data *
673 nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
674 {
675 struct nfs42_layouterror_data *data;
676 struct inode *inode = lseg->pls_layout->plh_inode;
677
678 data = kzalloc(sizeof(*data), gfp_flags);
679 if (data) {
680 data->args.inode = data->inode = nfs_igrab_and_active(inode);
681 if (data->inode) {
682 data->lseg = pnfs_get_lseg(lseg);
683 if (data->lseg)
684 return data;
685 nfs_iput_and_deactive(data->inode);
686 }
687 kfree(data);
688 }
689 return NULL;
690 }
691
692 static void
693 nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
694 {
695 pnfs_put_lseg(data->lseg);
696 nfs_iput_and_deactive(data->inode);
697 kfree(data);
698 }
699
700 static void
701 nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
702 {
703 struct nfs42_layouterror_data *data = calldata;
704 struct inode *inode = data->inode;
705 struct nfs_server *server = NFS_SERVER(inode);
706 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
707 unsigned i;
708
709 spin_lock(&inode->i_lock);
710 if (!pnfs_layout_is_valid(lo)) {
711 spin_unlock(&inode->i_lock);
712 rpc_exit(task, 0);
713 return;
714 }
715 for (i = 0; i < data->args.num_errors; i++)
716 nfs4_stateid_copy(&data->args.errors[i].stateid,
717 &lo->plh_stateid);
718 spin_unlock(&inode->i_lock);
719 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
720 &data->res.seq_res, task);
721 }
722
723 static void
724 nfs42_layouterror_done(struct rpc_task *task, void *calldata)
725 {
726 struct nfs42_layouterror_data *data = calldata;
727 struct inode *inode = data->inode;
728 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
729
730 if (!nfs4_sequence_done(task, &data->res.seq_res))
731 return;
732
733 switch (task->tk_status) {
734 case 0:
735 break;
736 case -NFS4ERR_BADHANDLE:
737 case -ESTALE:
738 pnfs_destroy_layout(NFS_I(inode));
739 break;
740 case -NFS4ERR_EXPIRED:
741 case -NFS4ERR_ADMIN_REVOKED:
742 case -NFS4ERR_DELEG_REVOKED:
743 case -NFS4ERR_STALE_STATEID:
744 case -NFS4ERR_BAD_STATEID:
745 spin_lock(&inode->i_lock);
746 if (pnfs_layout_is_valid(lo) &&
747 nfs4_stateid_match(&data->args.errors[0].stateid,
748 &lo->plh_stateid)) {
749 LIST_HEAD(head);
750
751
752
753
754
755 pnfs_mark_layout_stateid_invalid(lo, &head);
756 spin_unlock(&inode->i_lock);
757 pnfs_free_lseg_list(&head);
758 nfs_commit_inode(inode, 0);
759 } else
760 spin_unlock(&inode->i_lock);
761 break;
762 case -NFS4ERR_OLD_STATEID:
763 spin_lock(&inode->i_lock);
764 if (pnfs_layout_is_valid(lo) &&
765 nfs4_stateid_match_other(&data->args.errors[0].stateid,
766 &lo->plh_stateid)) {
767
768 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
769 &data->args.errors[0].stateid))
770 rpc_delay(task, HZ);
771 rpc_restart_call_prepare(task);
772 }
773 spin_unlock(&inode->i_lock);
774 break;
775 case -ENOTSUPP:
776 case -EOPNOTSUPP:
777 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
778 }
779 }
780
781 static void
782 nfs42_layouterror_release(void *calldata)
783 {
784 struct nfs42_layouterror_data *data = calldata;
785
786 nfs42_free_layouterror_data(data);
787 }
788
789 static const struct rpc_call_ops nfs42_layouterror_ops = {
790 .rpc_call_prepare = nfs42_layouterror_prepare,
791 .rpc_call_done = nfs42_layouterror_done,
792 .rpc_release = nfs42_layouterror_release,
793 };
794
795 int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
796 const struct nfs42_layout_error *errors, size_t n)
797 {
798 struct inode *inode = lseg->pls_layout->plh_inode;
799 struct nfs42_layouterror_data *data;
800 struct rpc_task *task;
801 struct rpc_message msg = {
802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
803 };
804 struct rpc_task_setup task_setup = {
805 .rpc_message = &msg,
806 .callback_ops = &nfs42_layouterror_ops,
807 .flags = RPC_TASK_ASYNC,
808 };
809 unsigned int i;
810
811 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
812 return -EOPNOTSUPP;
813 if (n > NFS42_LAYOUTERROR_MAX)
814 return -EINVAL;
815 data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
816 if (!data)
817 return -ENOMEM;
818 for (i = 0; i < n; i++) {
819 data->args.errors[i] = errors[i];
820 data->args.num_errors++;
821 data->res.num_errors++;
822 }
823 msg.rpc_argp = &data->args;
824 msg.rpc_resp = &data->res;
825 task_setup.callback_data = data;
826 task_setup.rpc_client = NFS_SERVER(inode)->client;
827 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
828 task = rpc_run_task(&task_setup);
829 if (IS_ERR(task))
830 return PTR_ERR(task);
831 rpc_put_task(task);
832 return 0;
833 }
834 EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
835
836 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
837 struct file *dst_f, struct nfs_lock_context *src_lock,
838 struct nfs_lock_context *dst_lock, loff_t src_offset,
839 loff_t dst_offset, loff_t count)
840 {
841 struct inode *src_inode = file_inode(src_f);
842 struct inode *dst_inode = file_inode(dst_f);
843 struct nfs_server *server = NFS_SERVER(dst_inode);
844 struct nfs42_clone_args args = {
845 .src_fh = NFS_FH(src_inode),
846 .dst_fh = NFS_FH(dst_inode),
847 .src_offset = src_offset,
848 .dst_offset = dst_offset,
849 .count = count,
850 .dst_bitmask = server->cache_consistency_bitmask,
851 };
852 struct nfs42_clone_res res = {
853 .server = server,
854 };
855 int status;
856
857 msg->rpc_argp = &args;
858 msg->rpc_resp = &res;
859
860 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
861 src_lock, FMODE_READ);
862 if (status)
863 return status;
864
865 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
866 dst_lock, FMODE_WRITE);
867 if (status)
868 return status;
869
870 res.dst_fattr = nfs_alloc_fattr();
871 if (!res.dst_fattr)
872 return -ENOMEM;
873
874 status = nfs4_call_sync(server->client, server, msg,
875 &args.seq_args, &res.seq_res, 0);
876 if (status == 0)
877 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
878
879 kfree(res.dst_fattr);
880 return status;
881 }
882
883 int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
884 loff_t src_offset, loff_t dst_offset, loff_t count)
885 {
886 struct rpc_message msg = {
887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
888 };
889 struct inode *inode = file_inode(src_f);
890 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
891 struct nfs_lock_context *src_lock;
892 struct nfs_lock_context *dst_lock;
893 struct nfs4_exception src_exception = { };
894 struct nfs4_exception dst_exception = { };
895 int err, err2;
896
897 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
898 return -EOPNOTSUPP;
899
900 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
901 if (IS_ERR(src_lock))
902 return PTR_ERR(src_lock);
903
904 src_exception.inode = file_inode(src_f);
905 src_exception.state = src_lock->open_context->state;
906
907 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
908 if (IS_ERR(dst_lock)) {
909 err = PTR_ERR(dst_lock);
910 goto out_put_src_lock;
911 }
912
913 dst_exception.inode = file_inode(dst_f);
914 dst_exception.state = dst_lock->open_context->state;
915
916 do {
917 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
918 src_offset, dst_offset, count);
919 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
920 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
921 err = -EOPNOTSUPP;
922 break;
923 }
924
925 err2 = nfs4_handle_exception(server, err, &src_exception);
926 err = nfs4_handle_exception(server, err, &dst_exception);
927 if (!err)
928 err = err2;
929 } while (src_exception.retry || dst_exception.retry);
930
931 nfs_put_lock_context(dst_lock);
932 out_put_src_lock:
933 nfs_put_lock_context(src_lock);
934 return err;
935 }