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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
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[NFS_BITMASK_SZ];
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 nfs4_bitmask_set(bitmask, server->cache_consistency_bitmask, inode,
73 NFS_INO_INVALID_BLOCKS);
74
75 res.falloc_fattr = nfs_alloc_fattr();
76 if (!res.falloc_fattr)
77 return -ENOMEM;
78
79 status = nfs4_call_sync(server->client, server, msg,
80 &args.seq_args, &res.seq_res, 0);
81 if (status == 0) {
82 if (nfs_should_remove_suid(inode)) {
83 spin_lock(&inode->i_lock);
84 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
85 spin_unlock(&inode->i_lock);
86 }
87 status = nfs_post_op_update_inode_force_wcc(inode,
88 res.falloc_fattr);
89 }
90 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE])
91 trace_nfs4_fallocate(inode, &args, status);
92 else
93 trace_nfs4_deallocate(inode, &args, status);
94 kfree(res.falloc_fattr);
95 return status;
96}
97
98static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
99 loff_t offset, loff_t len)
100{
101 struct inode *inode = file_inode(filep);
102 struct nfs_server *server = NFS_SERVER(inode);
103 struct nfs4_exception exception = { };
104 struct nfs_lock_context *lock;
105 int err;
106
107 lock = nfs_get_lock_context(nfs_file_open_context(filep));
108 if (IS_ERR(lock))
109 return PTR_ERR(lock);
110
111 exception.inode = inode;
112 exception.state = lock->open_context->state;
113
114 err = nfs_sync_inode(inode);
115 if (err)
116 goto out;
117
118 do {
119 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
120 if (err == -ENOTSUPP) {
121 err = -EOPNOTSUPP;
122 break;
123 }
124 err = nfs4_handle_exception(server, err, &exception);
125 } while (exception.retry);
126out:
127 nfs_put_lock_context(lock);
128 return err;
129}
130
131int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
132{
133 struct rpc_message msg = {
134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
135 };
136 struct inode *inode = file_inode(filep);
137 int err;
138
139 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
140 return -EOPNOTSUPP;
141
142 inode_lock(inode);
143
144 err = nfs42_proc_fallocate(&msg, filep, offset, len);
145 if (err == -EOPNOTSUPP)
146 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
147
148 inode_unlock(inode);
149 return err;
150}
151
152int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
153{
154 struct rpc_message msg = {
155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
156 };
157 struct inode *inode = file_inode(filep);
158 int err;
159
160 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
161 return -EOPNOTSUPP;
162
163 inode_lock(inode);
164
165 err = nfs42_proc_fallocate(&msg, filep, offset, len);
166 if (err == 0)
167 truncate_pagecache_range(inode, offset, (offset + len) -1);
168 if (err == -EOPNOTSUPP)
169 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
170
171 inode_unlock(inode);
172 return err;
173}
174
175static int handle_async_copy(struct nfs42_copy_res *res,
176 struct nfs_server *dst_server,
177 struct nfs_server *src_server,
178 struct file *src,
179 struct file *dst,
180 nfs4_stateid *src_stateid,
181 bool *restart)
182{
183 struct nfs4_copy_state *copy, *tmp_copy = NULL, *iter;
184 int status = NFS4_OK;
185 struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
186 struct nfs_open_context *src_ctx = nfs_file_open_context(src);
187
188 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_KERNEL);
189 if (!copy)
190 return -ENOMEM;
191
192 spin_lock(&dst_server->nfs_client->cl_lock);
193 list_for_each_entry(iter,
194 &dst_server->nfs_client->pending_cb_stateids,
195 copies) {
196 if (memcmp(&res->write_res.stateid, &iter->stateid,
197 NFS4_STATEID_SIZE))
198 continue;
199 tmp_copy = iter;
200 list_del(&iter->copies);
201 break;
202 }
203 if (tmp_copy) {
204 spin_unlock(&dst_server->nfs_client->cl_lock);
205 kfree(copy);
206 copy = tmp_copy;
207 goto out;
208 }
209
210 memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
211 init_completion(©->completion);
212 copy->parent_dst_state = dst_ctx->state;
213 copy->parent_src_state = src_ctx->state;
214
215 list_add_tail(©->copies, &dst_server->ss_copies);
216 spin_unlock(&dst_server->nfs_client->cl_lock);
217
218 if (dst_server != src_server) {
219 spin_lock(&src_server->nfs_client->cl_lock);
220 list_add_tail(©->src_copies, &src_server->ss_copies);
221 spin_unlock(&src_server->nfs_client->cl_lock);
222 }
223
224 status = wait_for_completion_interruptible(©->completion);
225 spin_lock(&dst_server->nfs_client->cl_lock);
226 list_del_init(©->copies);
227 spin_unlock(&dst_server->nfs_client->cl_lock);
228 if (dst_server != src_server) {
229 spin_lock(&src_server->nfs_client->cl_lock);
230 list_del_init(©->src_copies);
231 spin_unlock(&src_server->nfs_client->cl_lock);
232 }
233 if (status == -ERESTARTSYS) {
234 goto out_cancel;
235 } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
236 status = -EAGAIN;
237 *restart = true;
238 goto out_cancel;
239 }
240out:
241 res->write_res.count = copy->count;
242 memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
243 status = -copy->error;
244
245out_free:
246 kfree(copy);
247 return status;
248out_cancel:
249 nfs42_do_offload_cancel_async(dst, ©->stateid);
250 if (!nfs42_files_from_same_server(src, dst))
251 nfs42_do_offload_cancel_async(src, src_stateid);
252 goto out_free;
253}
254
255static int process_copy_commit(struct file *dst, loff_t pos_dst,
256 struct nfs42_copy_res *res)
257{
258 struct nfs_commitres cres;
259 int status = -ENOMEM;
260
261 cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_KERNEL);
262 if (!cres.verf)
263 goto out;
264
265 status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
266 if (status)
267 goto out_free;
268 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
269 &cres.verf->verifier)) {
270 dprintk("commit verf differs from copy verf\n");
271 status = -EAGAIN;
272 }
273out_free:
274 kfree(cres.verf);
275out:
276 return status;
277}
278
279/**
280 * nfs42_copy_dest_done - perform inode cache updates after clone/copy offload
281 * @inode: pointer to destination inode
282 * @pos: destination offset
283 * @len: copy length
284 *
285 * Punch a hole in the inode page cache, so that the NFS client will
286 * know to retrieve new data.
287 * Update the file size if necessary, and then mark the inode as having
288 * invalid cached values for change attribute, ctime, mtime and space used.
289 */
290static void nfs42_copy_dest_done(struct inode *inode, loff_t pos, loff_t len)
291{
292 loff_t newsize = pos + len;
293 loff_t end = newsize - 1;
294
295 WARN_ON_ONCE(invalidate_inode_pages2_range(inode->i_mapping,
296 pos >> PAGE_SHIFT, end >> PAGE_SHIFT));
297
298 spin_lock(&inode->i_lock);
299 if (newsize > i_size_read(inode))
300 i_size_write(inode, newsize);
301 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
302 NFS_INO_INVALID_CTIME |
303 NFS_INO_INVALID_MTIME |
304 NFS_INO_INVALID_BLOCKS);
305 spin_unlock(&inode->i_lock);
306}
307
308static ssize_t _nfs42_proc_copy(struct file *src,
309 struct nfs_lock_context *src_lock,
310 struct file *dst,
311 struct nfs_lock_context *dst_lock,
312 struct nfs42_copy_args *args,
313 struct nfs42_copy_res *res,
314 struct nl4_server *nss,
315 nfs4_stateid *cnr_stateid,
316 bool *restart)
317{
318 struct rpc_message msg = {
319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
320 .rpc_argp = args,
321 .rpc_resp = res,
322 };
323 struct inode *dst_inode = file_inode(dst);
324 struct inode *src_inode = file_inode(src);
325 struct nfs_server *dst_server = NFS_SERVER(dst_inode);
326 struct nfs_server *src_server = NFS_SERVER(src_inode);
327 loff_t pos_src = args->src_pos;
328 loff_t pos_dst = args->dst_pos;
329 size_t count = args->count;
330 ssize_t status;
331
332 if (nss) {
333 args->cp_src = nss;
334 nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
335 } else {
336 status = nfs4_set_rw_stateid(&args->src_stateid,
337 src_lock->open_context, src_lock, FMODE_READ);
338 if (status) {
339 if (status == -EAGAIN)
340 status = -NFS4ERR_BAD_STATEID;
341 return status;
342 }
343 }
344 status = nfs_filemap_write_and_wait_range(src->f_mapping,
345 pos_src, pos_src + (loff_t)count - 1);
346 if (status)
347 return status;
348
349 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
350 dst_lock, FMODE_WRITE);
351 if (status) {
352 if (status == -EAGAIN)
353 status = -NFS4ERR_BAD_STATEID;
354 return status;
355 }
356
357 status = nfs_sync_inode(dst_inode);
358 if (status)
359 return status;
360
361 res->commit_res.verf = NULL;
362 if (args->sync) {
363 res->commit_res.verf =
364 kzalloc(sizeof(struct nfs_writeverf), GFP_KERNEL);
365 if (!res->commit_res.verf)
366 return -ENOMEM;
367 }
368 set_bit(NFS_CLNT_SRC_SSC_COPY_STATE,
369 &src_lock->open_context->state->flags);
370 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
371 &dst_lock->open_context->state->flags);
372
373 status = nfs4_call_sync(dst_server->client, dst_server, &msg,
374 &args->seq_args, &res->seq_res, 0);
375 trace_nfs4_copy(src_inode, dst_inode, args, res, nss, status);
376 if (status == -ENOTSUPP)
377 dst_server->caps &= ~NFS_CAP_COPY;
378 if (status)
379 goto out;
380
381 if (args->sync &&
382 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
383 &res->commit_res.verf->verifier)) {
384 status = -EAGAIN;
385 goto out;
386 }
387
388 if (!res->synchronous) {
389 status = handle_async_copy(res, dst_server, src_server, src,
390 dst, &args->src_stateid, restart);
391 if (status)
392 goto out;
393 }
394
395 if ((!res->synchronous || !args->sync) &&
396 res->write_res.verifier.committed != NFS_FILE_SYNC) {
397 status = process_copy_commit(dst, pos_dst, res);
398 if (status)
399 goto out;
400 }
401
402 nfs42_copy_dest_done(dst_inode, pos_dst, res->write_res.count);
403 nfs_invalidate_atime(src_inode);
404 status = res->write_res.count;
405out:
406 if (args->sync)
407 kfree(res->commit_res.verf);
408 return status;
409}
410
411ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
412 struct file *dst, loff_t pos_dst, size_t count,
413 struct nl4_server *nss,
414 nfs4_stateid *cnr_stateid, bool sync)
415{
416 struct nfs_server *server = NFS_SERVER(file_inode(dst));
417 struct nfs_lock_context *src_lock;
418 struct nfs_lock_context *dst_lock;
419 struct nfs42_copy_args args = {
420 .src_fh = NFS_FH(file_inode(src)),
421 .src_pos = pos_src,
422 .dst_fh = NFS_FH(file_inode(dst)),
423 .dst_pos = pos_dst,
424 .count = count,
425 .sync = sync,
426 };
427 struct nfs42_copy_res res;
428 struct nfs4_exception src_exception = {
429 .inode = file_inode(src),
430 .stateid = &args.src_stateid,
431 };
432 struct nfs4_exception dst_exception = {
433 .inode = file_inode(dst),
434 .stateid = &args.dst_stateid,
435 };
436 ssize_t err, err2;
437 bool restart = false;
438
439 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
440 if (IS_ERR(src_lock))
441 return PTR_ERR(src_lock);
442
443 src_exception.state = src_lock->open_context->state;
444
445 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
446 if (IS_ERR(dst_lock)) {
447 err = PTR_ERR(dst_lock);
448 goto out_put_src_lock;
449 }
450
451 dst_exception.state = dst_lock->open_context->state;
452
453 do {
454 inode_lock(file_inode(dst));
455 err = _nfs42_proc_copy(src, src_lock,
456 dst, dst_lock,
457 &args, &res,
458 nss, cnr_stateid, &restart);
459 inode_unlock(file_inode(dst));
460
461 if (err >= 0)
462 break;
463 if (err == -ENOTSUPP &&
464 nfs42_files_from_same_server(src, dst)) {
465 err = -EOPNOTSUPP;
466 break;
467 } else if (err == -EAGAIN) {
468 if (!restart) {
469 dst_exception.retry = 1;
470 continue;
471 }
472 break;
473 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
474 args.sync = true;
475 dst_exception.retry = 1;
476 continue;
477 } else if ((err == -ESTALE ||
478 err == -NFS4ERR_OFFLOAD_DENIED ||
479 err == -ENOTSUPP) &&
480 !nfs42_files_from_same_server(src, dst)) {
481 nfs42_do_offload_cancel_async(src, &args.src_stateid);
482 err = -EOPNOTSUPP;
483 break;
484 }
485
486 err2 = nfs4_handle_exception(server, err, &src_exception);
487 err = nfs4_handle_exception(server, err, &dst_exception);
488 if (!err)
489 err = err2;
490 } while (src_exception.retry || dst_exception.retry);
491
492 nfs_put_lock_context(dst_lock);
493out_put_src_lock:
494 nfs_put_lock_context(src_lock);
495 return err;
496}
497
498struct nfs42_offloadcancel_data {
499 struct nfs_server *seq_server;
500 struct nfs42_offload_status_args args;
501 struct nfs42_offload_status_res res;
502};
503
504static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
505{
506 struct nfs42_offloadcancel_data *data = calldata;
507
508 nfs4_setup_sequence(data->seq_server->nfs_client,
509 &data->args.osa_seq_args,
510 &data->res.osr_seq_res, task);
511}
512
513static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
514{
515 struct nfs42_offloadcancel_data *data = calldata;
516
517 trace_nfs4_offload_cancel(&data->args, task->tk_status);
518 nfs41_sequence_done(task, &data->res.osr_seq_res);
519 if (task->tk_status &&
520 nfs4_async_handle_error(task, data->seq_server, NULL,
521 NULL) == -EAGAIN)
522 rpc_restart_call_prepare(task);
523}
524
525static void nfs42_free_offloadcancel_data(void *data)
526{
527 kfree(data);
528}
529
530static const struct rpc_call_ops nfs42_offload_cancel_ops = {
531 .rpc_call_prepare = nfs42_offload_cancel_prepare,
532 .rpc_call_done = nfs42_offload_cancel_done,
533 .rpc_release = nfs42_free_offloadcancel_data,
534};
535
536static int nfs42_do_offload_cancel_async(struct file *dst,
537 nfs4_stateid *stateid)
538{
539 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
540 struct nfs42_offloadcancel_data *data = NULL;
541 struct nfs_open_context *ctx = nfs_file_open_context(dst);
542 struct rpc_task *task;
543 struct rpc_message msg = {
544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
545 .rpc_cred = ctx->cred,
546 };
547 struct rpc_task_setup task_setup_data = {
548 .rpc_client = dst_server->client,
549 .rpc_message = &msg,
550 .callback_ops = &nfs42_offload_cancel_ops,
551 .workqueue = nfsiod_workqueue,
552 .flags = RPC_TASK_ASYNC,
553 };
554 int status;
555
556 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
557 return -EOPNOTSUPP;
558
559 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_KERNEL);
560 if (data == NULL)
561 return -ENOMEM;
562
563 data->seq_server = dst_server;
564 data->args.osa_src_fh = NFS_FH(file_inode(dst));
565 memcpy(&data->args.osa_stateid, stateid,
566 sizeof(data->args.osa_stateid));
567 msg.rpc_argp = &data->args;
568 msg.rpc_resp = &data->res;
569 task_setup_data.callback_data = data;
570 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
571 1, 0);
572 task = rpc_run_task(&task_setup_data);
573 if (IS_ERR(task))
574 return PTR_ERR(task);
575 status = rpc_wait_for_completion_task(task);
576 if (status == -ENOTSUPP)
577 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
578 rpc_put_task(task);
579 return status;
580}
581
582static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
583 struct nfs42_copy_notify_args *args,
584 struct nfs42_copy_notify_res *res)
585{
586 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
587 struct rpc_message msg = {
588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
589 .rpc_argp = args,
590 .rpc_resp = res,
591 };
592 int status;
593 struct nfs_open_context *ctx;
594 struct nfs_lock_context *l_ctx;
595
596 ctx = get_nfs_open_context(nfs_file_open_context(src));
597 l_ctx = nfs_get_lock_context(ctx);
598 if (IS_ERR(l_ctx)) {
599 status = PTR_ERR(l_ctx);
600 goto out;
601 }
602
603 status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
604 FMODE_READ);
605 nfs_put_lock_context(l_ctx);
606 if (status) {
607 if (status == -EAGAIN)
608 status = -NFS4ERR_BAD_STATEID;
609 goto out;
610 }
611
612 status = nfs4_call_sync(src_server->client, src_server, &msg,
613 &args->cna_seq_args, &res->cnr_seq_res, 0);
614 trace_nfs4_copy_notify(file_inode(src), args, res, status);
615 if (status == -ENOTSUPP)
616 src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
617
618out:
619 put_nfs_open_context(nfs_file_open_context(src));
620 return status;
621}
622
623int nfs42_proc_copy_notify(struct file *src, struct file *dst,
624 struct nfs42_copy_notify_res *res)
625{
626 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
627 struct nfs42_copy_notify_args *args;
628 struct nfs4_exception exception = {
629 .inode = file_inode(src),
630 };
631 int status;
632
633 if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
634 return -EOPNOTSUPP;
635
636 args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_KERNEL);
637 if (args == NULL)
638 return -ENOMEM;
639
640 args->cna_src_fh = NFS_FH(file_inode(src)),
641 args->cna_dst.nl4_type = NL4_NETADDR;
642 nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
643 exception.stateid = &args->cna_src_stateid;
644
645 do {
646 status = _nfs42_proc_copy_notify(src, dst, args, res);
647 if (status == -ENOTSUPP) {
648 status = -EOPNOTSUPP;
649 goto out;
650 }
651 status = nfs4_handle_exception(src_server, status, &exception);
652 } while (exception.retry);
653
654out:
655 kfree(args);
656 return status;
657}
658
659static loff_t _nfs42_proc_llseek(struct file *filep,
660 struct nfs_lock_context *lock, loff_t offset, int whence)
661{
662 struct inode *inode = file_inode(filep);
663 struct nfs42_seek_args args = {
664 .sa_fh = NFS_FH(inode),
665 .sa_offset = offset,
666 .sa_what = (whence == SEEK_HOLE) ?
667 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
668 };
669 struct nfs42_seek_res res;
670 struct rpc_message msg = {
671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
672 .rpc_argp = &args,
673 .rpc_resp = &res,
674 };
675 struct nfs_server *server = NFS_SERVER(inode);
676 int status;
677
678 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
679 return -ENOTSUPP;
680
681 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
682 lock, FMODE_READ);
683 if (status) {
684 if (status == -EAGAIN)
685 status = -NFS4ERR_BAD_STATEID;
686 return status;
687 }
688
689 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
690 offset, LLONG_MAX);
691 if (status)
692 return status;
693
694 status = nfs4_call_sync(server->client, server, &msg,
695 &args.seq_args, &res.seq_res, 0);
696 trace_nfs4_llseek(inode, &args, &res, status);
697 if (status == -ENOTSUPP)
698 server->caps &= ~NFS_CAP_SEEK;
699 if (status)
700 return status;
701
702 if (whence == SEEK_DATA && res.sr_eof)
703 return -NFS4ERR_NXIO;
704 else
705 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
706}
707
708loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
709{
710 struct nfs_server *server = NFS_SERVER(file_inode(filep));
711 struct nfs4_exception exception = { };
712 struct nfs_lock_context *lock;
713 loff_t err;
714
715 lock = nfs_get_lock_context(nfs_file_open_context(filep));
716 if (IS_ERR(lock))
717 return PTR_ERR(lock);
718
719 exception.inode = file_inode(filep);
720 exception.state = lock->open_context->state;
721
722 do {
723 err = _nfs42_proc_llseek(filep, lock, offset, whence);
724 if (err >= 0)
725 break;
726 if (err == -ENOTSUPP) {
727 err = -EOPNOTSUPP;
728 break;
729 }
730 err = nfs4_handle_exception(server, err, &exception);
731 } while (exception.retry);
732
733 nfs_put_lock_context(lock);
734 return err;
735}
736
737
738static void
739nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
740{
741 struct nfs42_layoutstat_data *data = calldata;
742 struct inode *inode = data->inode;
743 struct nfs_server *server = NFS_SERVER(inode);
744 struct pnfs_layout_hdr *lo;
745
746 spin_lock(&inode->i_lock);
747 lo = NFS_I(inode)->layout;
748 if (!pnfs_layout_is_valid(lo)) {
749 spin_unlock(&inode->i_lock);
750 rpc_exit(task, 0);
751 return;
752 }
753 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
754 spin_unlock(&inode->i_lock);
755 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
756 &data->res.seq_res, task);
757}
758
759static void
760nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
761{
762 struct nfs42_layoutstat_data *data = calldata;
763 struct inode *inode = data->inode;
764 struct pnfs_layout_hdr *lo;
765
766 if (!nfs4_sequence_done(task, &data->res.seq_res))
767 return;
768
769 switch (task->tk_status) {
770 case 0:
771 return;
772 case -NFS4ERR_BADHANDLE:
773 case -ESTALE:
774 pnfs_destroy_layout(NFS_I(inode));
775 break;
776 case -NFS4ERR_EXPIRED:
777 case -NFS4ERR_ADMIN_REVOKED:
778 case -NFS4ERR_DELEG_REVOKED:
779 case -NFS4ERR_STALE_STATEID:
780 case -NFS4ERR_BAD_STATEID:
781 spin_lock(&inode->i_lock);
782 lo = NFS_I(inode)->layout;
783 if (pnfs_layout_is_valid(lo) &&
784 nfs4_stateid_match(&data->args.stateid,
785 &lo->plh_stateid)) {
786 LIST_HEAD(head);
787
788 /*
789 * Mark the bad layout state as invalid, then retry
790 * with the current stateid.
791 */
792 pnfs_mark_layout_stateid_invalid(lo, &head);
793 spin_unlock(&inode->i_lock);
794 pnfs_free_lseg_list(&head);
795 nfs_commit_inode(inode, 0);
796 } else
797 spin_unlock(&inode->i_lock);
798 break;
799 case -NFS4ERR_OLD_STATEID:
800 spin_lock(&inode->i_lock);
801 lo = NFS_I(inode)->layout;
802 if (pnfs_layout_is_valid(lo) &&
803 nfs4_stateid_match_other(&data->args.stateid,
804 &lo->plh_stateid)) {
805 /* Do we need to delay before resending? */
806 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
807 &data->args.stateid))
808 rpc_delay(task, HZ);
809 rpc_restart_call_prepare(task);
810 }
811 spin_unlock(&inode->i_lock);
812 break;
813 case -ENOTSUPP:
814 case -EOPNOTSUPP:
815 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
816 }
817
818 trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
819}
820
821static void
822nfs42_layoutstat_release(void *calldata)
823{
824 struct nfs42_layoutstat_data *data = calldata;
825 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
826 int i;
827
828 for (i = 0; i < data->args.num_dev; i++) {
829 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
830 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
831 }
832
833 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
834 smp_mb__before_atomic();
835 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
836 smp_mb__after_atomic();
837 nfs_iput_and_deactive(data->inode);
838 kfree(data->args.devinfo);
839 kfree(data);
840}
841
842static const struct rpc_call_ops nfs42_layoutstat_ops = {
843 .rpc_call_prepare = nfs42_layoutstat_prepare,
844 .rpc_call_done = nfs42_layoutstat_done,
845 .rpc_release = nfs42_layoutstat_release,
846};
847
848int nfs42_proc_layoutstats_generic(struct nfs_server *server,
849 struct nfs42_layoutstat_data *data)
850{
851 struct rpc_message msg = {
852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
853 .rpc_argp = &data->args,
854 .rpc_resp = &data->res,
855 };
856 struct rpc_task_setup task_setup = {
857 .rpc_client = server->client,
858 .rpc_message = &msg,
859 .callback_ops = &nfs42_layoutstat_ops,
860 .callback_data = data,
861 .flags = RPC_TASK_ASYNC,
862 };
863 struct rpc_task *task;
864
865 data->inode = nfs_igrab_and_active(data->args.inode);
866 if (!data->inode) {
867 nfs42_layoutstat_release(data);
868 return -EAGAIN;
869 }
870 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
871 task = rpc_run_task(&task_setup);
872 if (IS_ERR(task))
873 return PTR_ERR(task);
874 rpc_put_task(task);
875 return 0;
876}
877
878static struct nfs42_layouterror_data *
879nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
880{
881 struct nfs42_layouterror_data *data;
882 struct inode *inode = lseg->pls_layout->plh_inode;
883
884 data = kzalloc(sizeof(*data), gfp_flags);
885 if (data) {
886 data->args.inode = data->inode = nfs_igrab_and_active(inode);
887 if (data->inode) {
888 data->lseg = pnfs_get_lseg(lseg);
889 if (data->lseg)
890 return data;
891 nfs_iput_and_deactive(data->inode);
892 }
893 kfree(data);
894 }
895 return NULL;
896}
897
898static void
899nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
900{
901 pnfs_put_lseg(data->lseg);
902 nfs_iput_and_deactive(data->inode);
903 kfree(data);
904}
905
906static void
907nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
908{
909 struct nfs42_layouterror_data *data = calldata;
910 struct inode *inode = data->inode;
911 struct nfs_server *server = NFS_SERVER(inode);
912 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
913 unsigned i;
914
915 spin_lock(&inode->i_lock);
916 if (!pnfs_layout_is_valid(lo)) {
917 spin_unlock(&inode->i_lock);
918 rpc_exit(task, 0);
919 return;
920 }
921 for (i = 0; i < data->args.num_errors; i++)
922 nfs4_stateid_copy(&data->args.errors[i].stateid,
923 &lo->plh_stateid);
924 spin_unlock(&inode->i_lock);
925 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
926 &data->res.seq_res, task);
927}
928
929static void
930nfs42_layouterror_done(struct rpc_task *task, void *calldata)
931{
932 struct nfs42_layouterror_data *data = calldata;
933 struct inode *inode = data->inode;
934 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
935
936 if (!nfs4_sequence_done(task, &data->res.seq_res))
937 return;
938
939 switch (task->tk_status) {
940 case 0:
941 return;
942 case -NFS4ERR_BADHANDLE:
943 case -ESTALE:
944 pnfs_destroy_layout(NFS_I(inode));
945 break;
946 case -NFS4ERR_EXPIRED:
947 case -NFS4ERR_ADMIN_REVOKED:
948 case -NFS4ERR_DELEG_REVOKED:
949 case -NFS4ERR_STALE_STATEID:
950 case -NFS4ERR_BAD_STATEID:
951 spin_lock(&inode->i_lock);
952 if (pnfs_layout_is_valid(lo) &&
953 nfs4_stateid_match(&data->args.errors[0].stateid,
954 &lo->plh_stateid)) {
955 LIST_HEAD(head);
956
957 /*
958 * Mark the bad layout state as invalid, then retry
959 * with the current stateid.
960 */
961 pnfs_mark_layout_stateid_invalid(lo, &head);
962 spin_unlock(&inode->i_lock);
963 pnfs_free_lseg_list(&head);
964 nfs_commit_inode(inode, 0);
965 } else
966 spin_unlock(&inode->i_lock);
967 break;
968 case -NFS4ERR_OLD_STATEID:
969 spin_lock(&inode->i_lock);
970 if (pnfs_layout_is_valid(lo) &&
971 nfs4_stateid_match_other(&data->args.errors[0].stateid,
972 &lo->plh_stateid)) {
973 /* Do we need to delay before resending? */
974 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
975 &data->args.errors[0].stateid))
976 rpc_delay(task, HZ);
977 rpc_restart_call_prepare(task);
978 }
979 spin_unlock(&inode->i_lock);
980 break;
981 case -ENOTSUPP:
982 case -EOPNOTSUPP:
983 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
984 }
985
986 trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
987 task->tk_status);
988}
989
990static void
991nfs42_layouterror_release(void *calldata)
992{
993 struct nfs42_layouterror_data *data = calldata;
994
995 nfs42_free_layouterror_data(data);
996}
997
998static const struct rpc_call_ops nfs42_layouterror_ops = {
999 .rpc_call_prepare = nfs42_layouterror_prepare,
1000 .rpc_call_done = nfs42_layouterror_done,
1001 .rpc_release = nfs42_layouterror_release,
1002};
1003
1004int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
1005 const struct nfs42_layout_error *errors, size_t n)
1006{
1007 struct inode *inode = lseg->pls_layout->plh_inode;
1008 struct nfs42_layouterror_data *data;
1009 struct rpc_task *task;
1010 struct rpc_message msg = {
1011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
1012 };
1013 struct rpc_task_setup task_setup = {
1014 .rpc_message = &msg,
1015 .callback_ops = &nfs42_layouterror_ops,
1016 .flags = RPC_TASK_ASYNC,
1017 };
1018 unsigned int i;
1019
1020 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
1021 return -EOPNOTSUPP;
1022 if (n > NFS42_LAYOUTERROR_MAX)
1023 return -EINVAL;
1024 data = nfs42_alloc_layouterror_data(lseg, nfs_io_gfp_mask());
1025 if (!data)
1026 return -ENOMEM;
1027 for (i = 0; i < n; i++) {
1028 data->args.errors[i] = errors[i];
1029 data->args.num_errors++;
1030 data->res.num_errors++;
1031 }
1032 msg.rpc_argp = &data->args;
1033 msg.rpc_resp = &data->res;
1034 task_setup.callback_data = data;
1035 task_setup.rpc_client = NFS_SERVER(inode)->client;
1036 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
1037 task = rpc_run_task(&task_setup);
1038 if (IS_ERR(task))
1039 return PTR_ERR(task);
1040 rpc_put_task(task);
1041 return 0;
1042}
1043EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
1044
1045static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
1046 struct file *dst_f, struct nfs_lock_context *src_lock,
1047 struct nfs_lock_context *dst_lock, loff_t src_offset,
1048 loff_t dst_offset, loff_t count)
1049{
1050 struct inode *src_inode = file_inode(src_f);
1051 struct inode *dst_inode = file_inode(dst_f);
1052 struct nfs_server *server = NFS_SERVER(dst_inode);
1053 __u32 dst_bitmask[NFS_BITMASK_SZ];
1054 struct nfs42_clone_args args = {
1055 .src_fh = NFS_FH(src_inode),
1056 .dst_fh = NFS_FH(dst_inode),
1057 .src_offset = src_offset,
1058 .dst_offset = dst_offset,
1059 .count = count,
1060 .dst_bitmask = dst_bitmask,
1061 };
1062 struct nfs42_clone_res res = {
1063 .server = server,
1064 };
1065 int status;
1066
1067 msg->rpc_argp = &args;
1068 msg->rpc_resp = &res;
1069
1070 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
1071 src_lock, FMODE_READ);
1072 if (status) {
1073 if (status == -EAGAIN)
1074 status = -NFS4ERR_BAD_STATEID;
1075 return status;
1076 }
1077 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
1078 dst_lock, FMODE_WRITE);
1079 if (status) {
1080 if (status == -EAGAIN)
1081 status = -NFS4ERR_BAD_STATEID;
1082 return status;
1083 }
1084
1085 res.dst_fattr = nfs_alloc_fattr();
1086 if (!res.dst_fattr)
1087 return -ENOMEM;
1088
1089 nfs4_bitmask_set(dst_bitmask, server->cache_consistency_bitmask,
1090 dst_inode, NFS_INO_INVALID_BLOCKS);
1091
1092 status = nfs4_call_sync(server->client, server, msg,
1093 &args.seq_args, &res.seq_res, 0);
1094 trace_nfs4_clone(src_inode, dst_inode, &args, status);
1095 if (status == 0) {
1096 /* a zero-length count means clone to EOF in src */
1097 if (count == 0 && res.dst_fattr->valid & NFS_ATTR_FATTR_SIZE)
1098 count = nfs_size_to_loff_t(res.dst_fattr->size) - dst_offset;
1099 nfs42_copy_dest_done(dst_inode, dst_offset, count);
1100 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
1101 }
1102
1103 kfree(res.dst_fattr);
1104 return status;
1105}
1106
1107int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
1108 loff_t src_offset, loff_t dst_offset, loff_t count)
1109{
1110 struct rpc_message msg = {
1111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
1112 };
1113 struct inode *inode = file_inode(src_f);
1114 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
1115 struct nfs_lock_context *src_lock;
1116 struct nfs_lock_context *dst_lock;
1117 struct nfs4_exception src_exception = { };
1118 struct nfs4_exception dst_exception = { };
1119 int err, err2;
1120
1121 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
1122 return -EOPNOTSUPP;
1123
1124 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
1125 if (IS_ERR(src_lock))
1126 return PTR_ERR(src_lock);
1127
1128 src_exception.inode = file_inode(src_f);
1129 src_exception.state = src_lock->open_context->state;
1130
1131 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
1132 if (IS_ERR(dst_lock)) {
1133 err = PTR_ERR(dst_lock);
1134 goto out_put_src_lock;
1135 }
1136
1137 dst_exception.inode = file_inode(dst_f);
1138 dst_exception.state = dst_lock->open_context->state;
1139
1140 do {
1141 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
1142 src_offset, dst_offset, count);
1143 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
1144 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
1145 err = -EOPNOTSUPP;
1146 break;
1147 }
1148
1149 err2 = nfs4_handle_exception(server, err, &src_exception);
1150 err = nfs4_handle_exception(server, err, &dst_exception);
1151 if (!err)
1152 err = err2;
1153 } while (src_exception.retry || dst_exception.retry);
1154
1155 nfs_put_lock_context(dst_lock);
1156out_put_src_lock:
1157 nfs_put_lock_context(src_lock);
1158 return err;
1159}
1160
1161#define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
1162
1163static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
1164{
1165 struct nfs_server *server = NFS_SERVER(inode);
1166 struct nfs42_removexattrargs args = {
1167 .fh = NFS_FH(inode),
1168 .xattr_name = name,
1169 };
1170 struct nfs42_removexattrres res;
1171 struct rpc_message msg = {
1172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
1173 .rpc_argp = &args,
1174 .rpc_resp = &res,
1175 };
1176 int ret;
1177 unsigned long timestamp = jiffies;
1178
1179 ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
1180 &res.seq_res, 1);
1181 trace_nfs4_removexattr(inode, name, ret);
1182 if (!ret)
1183 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1184
1185 return ret;
1186}
1187
1188static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
1189 const void *buf, size_t buflen, int flags)
1190{
1191 struct nfs_server *server = NFS_SERVER(inode);
1192 struct page *pages[NFS4XATTR_MAXPAGES];
1193 struct nfs42_setxattrargs arg = {
1194 .fh = NFS_FH(inode),
1195 .xattr_pages = pages,
1196 .xattr_len = buflen,
1197 .xattr_name = name,
1198 .xattr_flags = flags,
1199 };
1200 struct nfs42_setxattrres res;
1201 struct rpc_message msg = {
1202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
1203 .rpc_argp = &arg,
1204 .rpc_resp = &res,
1205 };
1206 int ret, np;
1207 unsigned long timestamp = jiffies;
1208
1209 if (buflen > server->sxasize)
1210 return -ERANGE;
1211
1212 if (buflen > 0) {
1213 np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
1214 if (np < 0)
1215 return np;
1216 } else
1217 np = 0;
1218
1219 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1220 &res.seq_res, 1);
1221 trace_nfs4_setxattr(inode, name, ret);
1222
1223 for (; np > 0; np--)
1224 put_page(pages[np - 1]);
1225
1226 if (!ret)
1227 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1228
1229 return ret;
1230}
1231
1232static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
1233 void *buf, size_t buflen, struct page **pages,
1234 size_t plen)
1235{
1236 struct nfs_server *server = NFS_SERVER(inode);
1237 struct nfs42_getxattrargs arg = {
1238 .fh = NFS_FH(inode),
1239 .xattr_name = name,
1240 };
1241 struct nfs42_getxattrres res;
1242 struct rpc_message msg = {
1243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
1244 .rpc_argp = &arg,
1245 .rpc_resp = &res,
1246 };
1247 ssize_t ret;
1248
1249 arg.xattr_len = plen;
1250 arg.xattr_pages = pages;
1251
1252 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1253 &res.seq_res, 0);
1254 trace_nfs4_getxattr(inode, name, ret);
1255 if (ret < 0)
1256 return ret;
1257
1258 /*
1259 * Normally, the caching is done one layer up, but for successful
1260 * RPCS, always cache the result here, even if the caller was
1261 * just querying the length, or if the reply was too big for
1262 * the caller. This avoids a second RPC in the case of the
1263 * common query-alloc-retrieve cycle for xattrs.
1264 *
1265 * Note that xattr_len is always capped to XATTR_SIZE_MAX.
1266 */
1267
1268 nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
1269
1270 if (buflen) {
1271 if (res.xattr_len > buflen)
1272 return -ERANGE;
1273 _copy_from_pages(buf, pages, 0, res.xattr_len);
1274 }
1275
1276 return res.xattr_len;
1277}
1278
1279static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
1280 size_t buflen, u64 *cookiep, bool *eofp)
1281{
1282 struct nfs_server *server = NFS_SERVER(inode);
1283 struct page **pages;
1284 struct nfs42_listxattrsargs arg = {
1285 .fh = NFS_FH(inode),
1286 .cookie = *cookiep,
1287 };
1288 struct nfs42_listxattrsres res = {
1289 .eof = false,
1290 .xattr_buf = buf,
1291 .xattr_len = buflen,
1292 };
1293 struct rpc_message msg = {
1294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
1295 .rpc_argp = &arg,
1296 .rpc_resp = &res,
1297 };
1298 u32 xdrlen;
1299 int ret, np, i;
1300
1301
1302 ret = -ENOMEM;
1303 res.scratch = alloc_page(GFP_KERNEL);
1304 if (!res.scratch)
1305 goto out;
1306
1307 xdrlen = nfs42_listxattr_xdrsize(buflen);
1308 if (xdrlen > server->lxasize)
1309 xdrlen = server->lxasize;
1310 np = xdrlen / PAGE_SIZE + 1;
1311
1312 pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
1313 if (!pages)
1314 goto out_free_scratch;
1315 for (i = 0; i < np; i++) {
1316 pages[i] = alloc_page(GFP_KERNEL);
1317 if (!pages[i])
1318 goto out_free_pages;
1319 }
1320
1321 arg.xattr_pages = pages;
1322 arg.count = xdrlen;
1323
1324 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1325 &res.seq_res, 0);
1326 trace_nfs4_listxattr(inode, ret);
1327
1328 if (ret >= 0) {
1329 ret = res.copied;
1330 *cookiep = res.cookie;
1331 *eofp = res.eof;
1332 }
1333
1334out_free_pages:
1335 while (--np >= 0) {
1336 if (pages[np])
1337 __free_page(pages[np]);
1338 }
1339 kfree(pages);
1340out_free_scratch:
1341 __free_page(res.scratch);
1342out:
1343 return ret;
1344
1345}
1346
1347ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
1348 void *buf, size_t buflen)
1349{
1350 struct nfs4_exception exception = { };
1351 ssize_t err, np, i;
1352 struct page **pages;
1353
1354 np = nfs_page_array_len(0, buflen ?: XATTR_SIZE_MAX);
1355 pages = kmalloc_array(np, sizeof(*pages), GFP_KERNEL);
1356 if (!pages)
1357 return -ENOMEM;
1358
1359 for (i = 0; i < np; i++) {
1360 pages[i] = alloc_page(GFP_KERNEL);
1361 if (!pages[i]) {
1362 np = i + 1;
1363 err = -ENOMEM;
1364 goto out;
1365 }
1366 }
1367
1368 /*
1369 * The GETXATTR op has no length field in the call, and the
1370 * xattr data is at the end of the reply.
1371 *
1372 * There is no downside in using the page-aligned length. It will
1373 * allow receiving and caching xattrs that are too large for the
1374 * caller but still fit in the page-rounded value.
1375 */
1376 do {
1377 err = _nfs42_proc_getxattr(inode, name, buf, buflen,
1378 pages, np * PAGE_SIZE);
1379 if (err >= 0)
1380 break;
1381 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1382 &exception);
1383 } while (exception.retry);
1384
1385out:
1386 while (--np >= 0)
1387 __free_page(pages[np]);
1388 kfree(pages);
1389
1390 return err;
1391}
1392
1393int nfs42_proc_setxattr(struct inode *inode, const char *name,
1394 const void *buf, size_t buflen, int flags)
1395{
1396 struct nfs4_exception exception = { };
1397 int err;
1398
1399 do {
1400 err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
1401 if (!err)
1402 break;
1403 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1404 &exception);
1405 } while (exception.retry);
1406
1407 return err;
1408}
1409
1410ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
1411 size_t buflen, u64 *cookiep, bool *eofp)
1412{
1413 struct nfs4_exception exception = { };
1414 ssize_t err;
1415
1416 do {
1417 err = _nfs42_proc_listxattrs(inode, buf, buflen,
1418 cookiep, eofp);
1419 if (err >= 0)
1420 break;
1421 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1422 &exception);
1423 } while (exception.retry);
1424
1425 return err;
1426}
1427
1428int nfs42_proc_removexattr(struct inode *inode, const char *name)
1429{
1430 struct nfs4_exception exception = { };
1431 int err;
1432
1433 do {
1434 err = _nfs42_proc_removexattr(inode, name);
1435 if (!err)
1436 break;
1437 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1438 &exception);
1439 } while (exception.retry);
1440
1441 return err;
1442}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
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
20static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
21
22static 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
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 = { };
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
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
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
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
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;
129out_unlock:
130 inode_unlock(inode);
131 return err;
132}
133
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{
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 }
183out:
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;
190out_cancel:
191 nfs42_do_offload_cancel_async(dst, ©->stateid);
192 kfree(copy);
193 return status;
194}
195
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
220static 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 return status;
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 return status;
294 }
295
296 truncate_pagecache_range(dst_inode, pos_dst,
297 pos_dst + res->write_res.count);
298
299 status = res->write_res.count;
300out:
301 if (args->sync)
302 kfree(res->commit_res.verf);
303 return status;
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;
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);
374out_put_src_lock:
375 nfs_put_lock_context(src_lock);
376 return err;
377}
378
379struct 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
385static 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
394static 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
405static void nfs42_free_offloadcancel_data(void *data)
406{
407 kfree(data);
408}
409
410static 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
416static 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
462static 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
504loff_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
534static void
535nfs42_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
555static void
556nfs42_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 * Mark the bad layout state as invalid, then retry
586 * with the current stateid.
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 /* Do we need to delay before resending? */
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
615static void
616nfs42_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
636static 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
642int 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
672static struct nfs42_layouterror_data *
673nfs42_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
692static void
693nfs42_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
700static void
701nfs42_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
723static void
724nfs42_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 * Mark the bad layout state as invalid, then retry
753 * with the current stateid.
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 /* Do we need to delay before resending? */
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
781static void
782nfs42_layouterror_release(void *calldata)
783{
784 struct nfs42_layouterror_data *data = calldata;
785
786 nfs42_free_layouterror_data(data);
787}
788
789static 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
795int 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}
834EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
835
836static 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
883int 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);
932out_put_src_lock:
933 nfs_put_lock_context(src_lock);
934 return err;
935}