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
23 static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
24
nfs42_set_netaddr(struct file * filep,struct nfs42_netaddr * naddr)25 static 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
_nfs42_proc_fallocate(struct rpc_message * msg,struct file * filep,struct nfs_lock_context * lock,loff_t offset,loff_t len)44 static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
45 struct nfs_lock_context *lock, loff_t offset, loff_t len)
46 {
47 struct inode *inode = file_inode(filep);
48 struct nfs_server *server = NFS_SERVER(inode);
49 u32 bitmask[3];
50 struct nfs42_falloc_args args = {
51 .falloc_fh = NFS_FH(inode),
52 .falloc_offset = offset,
53 .falloc_length = len,
54 .falloc_bitmask = bitmask,
55 };
56 struct nfs42_falloc_res res = {
57 .falloc_server = server,
58 };
59 int status;
60
61 msg->rpc_argp = &args;
62 msg->rpc_resp = &res;
63
64 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
65 lock, FMODE_WRITE);
66 if (status) {
67 if (status == -EAGAIN)
68 status = -NFS4ERR_BAD_STATEID;
69 return status;
70 }
71
72 memcpy(bitmask, server->cache_consistency_bitmask, sizeof(bitmask));
73 if (server->attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)
74 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
75
76 res.falloc_fattr = nfs_alloc_fattr();
77 if (!res.falloc_fattr)
78 return -ENOMEM;
79
80 status = nfs4_call_sync(server->client, server, msg,
81 &args.seq_args, &res.seq_res, 0);
82 if (status == 0)
83 status = nfs_post_op_update_inode_force_wcc(inode,
84 res.falloc_fattr);
85
86 kfree(res.falloc_fattr);
87 return status;
88 }
89
nfs42_proc_fallocate(struct rpc_message * msg,struct file * filep,loff_t offset,loff_t len)90 static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
91 loff_t offset, loff_t len)
92 {
93 struct inode *inode = file_inode(filep);
94 struct nfs_server *server = NFS_SERVER(inode);
95 struct nfs4_exception exception = { };
96 struct nfs_lock_context *lock;
97 int err;
98
99 lock = nfs_get_lock_context(nfs_file_open_context(filep));
100 if (IS_ERR(lock))
101 return PTR_ERR(lock);
102
103 exception.inode = inode;
104 exception.state = lock->open_context->state;
105
106 err = nfs_sync_inode(inode);
107 if (err)
108 goto out;
109
110 do {
111 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
112 if (err == -ENOTSUPP) {
113 err = -EOPNOTSUPP;
114 break;
115 }
116 err = nfs4_handle_exception(server, err, &exception);
117 } while (exception.retry);
118 out:
119 nfs_put_lock_context(lock);
120 return err;
121 }
122
nfs42_proc_allocate(struct file * filep,loff_t offset,loff_t len)123 int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
124 {
125 struct rpc_message msg = {
126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
127 };
128 struct inode *inode = file_inode(filep);
129 int err;
130
131 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
132 return -EOPNOTSUPP;
133
134 inode_lock(inode);
135
136 err = nfs42_proc_fallocate(&msg, filep, offset, len);
137 if (err == -EOPNOTSUPP)
138 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
139
140 inode_unlock(inode);
141 return err;
142 }
143
nfs42_proc_deallocate(struct file * filep,loff_t offset,loff_t len)144 int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
145 {
146 struct rpc_message msg = {
147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
148 };
149 struct inode *inode = file_inode(filep);
150 int err;
151
152 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
153 return -EOPNOTSUPP;
154
155 inode_lock(inode);
156
157 err = nfs42_proc_fallocate(&msg, filep, offset, len);
158 if (err == 0)
159 truncate_pagecache_range(inode, offset, (offset + len) -1);
160 if (err == -EOPNOTSUPP)
161 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
162
163 inode_unlock(inode);
164 return err;
165 }
166
handle_async_copy(struct nfs42_copy_res * res,struct nfs_server * dst_server,struct nfs_server * src_server,struct file * src,struct file * dst,nfs4_stateid * src_stateid,bool * restart)167 static int handle_async_copy(struct nfs42_copy_res *res,
168 struct nfs_server *dst_server,
169 struct nfs_server *src_server,
170 struct file *src,
171 struct file *dst,
172 nfs4_stateid *src_stateid,
173 bool *restart)
174 {
175 struct nfs4_copy_state *copy, *tmp_copy;
176 int status = NFS4_OK;
177 bool found_pending = false;
178 struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
179 struct nfs_open_context *src_ctx = nfs_file_open_context(src);
180
181 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
182 if (!copy)
183 return -ENOMEM;
184
185 spin_lock(&dst_server->nfs_client->cl_lock);
186 list_for_each_entry(tmp_copy,
187 &dst_server->nfs_client->pending_cb_stateids,
188 copies) {
189 if (memcmp(&res->write_res.stateid, &tmp_copy->stateid,
190 NFS4_STATEID_SIZE))
191 continue;
192 found_pending = true;
193 list_del(&tmp_copy->copies);
194 break;
195 }
196 if (found_pending) {
197 spin_unlock(&dst_server->nfs_client->cl_lock);
198 kfree(copy);
199 copy = tmp_copy;
200 goto out;
201 }
202
203 memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
204 init_completion(©->completion);
205 copy->parent_dst_state = dst_ctx->state;
206 copy->parent_src_state = src_ctx->state;
207
208 list_add_tail(©->copies, &dst_server->ss_copies);
209 spin_unlock(&dst_server->nfs_client->cl_lock);
210
211 if (dst_server != src_server) {
212 spin_lock(&src_server->nfs_client->cl_lock);
213 list_add_tail(©->src_copies, &src_server->ss_copies);
214 spin_unlock(&src_server->nfs_client->cl_lock);
215 }
216
217 status = wait_for_completion_interruptible(©->completion);
218 spin_lock(&dst_server->nfs_client->cl_lock);
219 list_del_init(©->copies);
220 spin_unlock(&dst_server->nfs_client->cl_lock);
221 if (dst_server != src_server) {
222 spin_lock(&src_server->nfs_client->cl_lock);
223 list_del_init(©->src_copies);
224 spin_unlock(&src_server->nfs_client->cl_lock);
225 }
226 if (status == -ERESTARTSYS) {
227 goto out_cancel;
228 } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
229 status = -EAGAIN;
230 *restart = true;
231 goto out_cancel;
232 }
233 out:
234 res->write_res.count = copy->count;
235 memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
236 status = -copy->error;
237
238 out_free:
239 kfree(copy);
240 return status;
241 out_cancel:
242 nfs42_do_offload_cancel_async(dst, ©->stateid);
243 if (!nfs42_files_from_same_server(src, dst))
244 nfs42_do_offload_cancel_async(src, src_stateid);
245 goto out_free;
246 }
247
process_copy_commit(struct file * dst,loff_t pos_dst,struct nfs42_copy_res * res)248 static int process_copy_commit(struct file *dst, loff_t pos_dst,
249 struct nfs42_copy_res *res)
250 {
251 struct nfs_commitres cres;
252 int status = -ENOMEM;
253
254 cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
255 if (!cres.verf)
256 goto out;
257
258 status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
259 if (status)
260 goto out_free;
261 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
262 &cres.verf->verifier)) {
263 dprintk("commit verf differs from copy verf\n");
264 status = -EAGAIN;
265 }
266 out_free:
267 kfree(cres.verf);
268 out:
269 return status;
270 }
271
_nfs42_proc_copy(struct file * src,struct nfs_lock_context * src_lock,struct file * dst,struct nfs_lock_context * dst_lock,struct nfs42_copy_args * args,struct nfs42_copy_res * res,struct nl4_server * nss,nfs4_stateid * cnr_stateid,bool * restart)272 static ssize_t _nfs42_proc_copy(struct file *src,
273 struct nfs_lock_context *src_lock,
274 struct file *dst,
275 struct nfs_lock_context *dst_lock,
276 struct nfs42_copy_args *args,
277 struct nfs42_copy_res *res,
278 struct nl4_server *nss,
279 nfs4_stateid *cnr_stateid,
280 bool *restart)
281 {
282 struct rpc_message msg = {
283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
284 .rpc_argp = args,
285 .rpc_resp = res,
286 };
287 struct inode *dst_inode = file_inode(dst);
288 struct inode *src_inode = file_inode(src);
289 struct nfs_server *dst_server = NFS_SERVER(dst_inode);
290 struct nfs_server *src_server = NFS_SERVER(src_inode);
291 loff_t pos_src = args->src_pos;
292 loff_t pos_dst = args->dst_pos;
293 size_t count = args->count;
294 ssize_t status;
295
296 if (nss) {
297 args->cp_src = nss;
298 nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
299 } else {
300 status = nfs4_set_rw_stateid(&args->src_stateid,
301 src_lock->open_context, src_lock, FMODE_READ);
302 if (status) {
303 if (status == -EAGAIN)
304 status = -NFS4ERR_BAD_STATEID;
305 return status;
306 }
307 }
308 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
309 pos_src, pos_src + (loff_t)count - 1);
310 if (status)
311 return status;
312
313 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
314 dst_lock, FMODE_WRITE);
315 if (status) {
316 if (status == -EAGAIN)
317 status = -NFS4ERR_BAD_STATEID;
318 return status;
319 }
320
321 status = nfs_sync_inode(dst_inode);
322 if (status)
323 return status;
324
325 res->commit_res.verf = NULL;
326 if (args->sync) {
327 res->commit_res.verf =
328 kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
329 if (!res->commit_res.verf)
330 return -ENOMEM;
331 }
332 set_bit(NFS_CLNT_SRC_SSC_COPY_STATE,
333 &src_lock->open_context->state->flags);
334 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
335 &dst_lock->open_context->state->flags);
336
337 status = nfs4_call_sync(dst_server->client, dst_server, &msg,
338 &args->seq_args, &res->seq_res, 0);
339 if (status == -ENOTSUPP)
340 dst_server->caps &= ~NFS_CAP_COPY;
341 if (status)
342 goto out;
343
344 if (args->sync &&
345 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
346 &res->commit_res.verf->verifier)) {
347 status = -EAGAIN;
348 goto out;
349 }
350
351 if (!res->synchronous) {
352 status = handle_async_copy(res, dst_server, src_server, src,
353 dst, &args->src_stateid, restart);
354 if (status)
355 goto out;
356 }
357
358 if ((!res->synchronous || !args->sync) &&
359 res->write_res.verifier.committed != NFS_FILE_SYNC) {
360 status = process_copy_commit(dst, pos_dst, res);
361 if (status)
362 goto out;
363 }
364
365 WARN_ON_ONCE(invalidate_inode_pages2_range(dst_inode->i_mapping,
366 pos_dst >> PAGE_SHIFT,
367 (pos_dst + res->write_res.count - 1) >> PAGE_SHIFT));
368 spin_lock(&dst_inode->i_lock);
369 NFS_I(dst_inode)->cache_validity |= (NFS_INO_REVAL_PAGECACHE |
370 NFS_INO_REVAL_FORCED | NFS_INO_INVALID_SIZE |
371 NFS_INO_INVALID_ATTR | NFS_INO_INVALID_DATA);
372 spin_unlock(&dst_inode->i_lock);
373 spin_lock(&src_inode->i_lock);
374 NFS_I(src_inode)->cache_validity |= (NFS_INO_REVAL_PAGECACHE |
375 NFS_INO_REVAL_FORCED | NFS_INO_INVALID_ATIME);
376 spin_unlock(&src_inode->i_lock);
377 status = res->write_res.count;
378 out:
379 if (args->sync)
380 kfree(res->commit_res.verf);
381 return status;
382 }
383
nfs42_proc_copy(struct file * src,loff_t pos_src,struct file * dst,loff_t pos_dst,size_t count,struct nl4_server * nss,nfs4_stateid * cnr_stateid,bool sync)384 ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
385 struct file *dst, loff_t pos_dst, size_t count,
386 struct nl4_server *nss,
387 nfs4_stateid *cnr_stateid, bool sync)
388 {
389 struct nfs_server *server = NFS_SERVER(file_inode(dst));
390 struct nfs_lock_context *src_lock;
391 struct nfs_lock_context *dst_lock;
392 struct nfs42_copy_args args = {
393 .src_fh = NFS_FH(file_inode(src)),
394 .src_pos = pos_src,
395 .dst_fh = NFS_FH(file_inode(dst)),
396 .dst_pos = pos_dst,
397 .count = count,
398 .sync = sync,
399 };
400 struct nfs42_copy_res res;
401 struct nfs4_exception src_exception = {
402 .inode = file_inode(src),
403 .stateid = &args.src_stateid,
404 };
405 struct nfs4_exception dst_exception = {
406 .inode = file_inode(dst),
407 .stateid = &args.dst_stateid,
408 };
409 ssize_t err, err2;
410 bool restart = false;
411
412 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
413 if (IS_ERR(src_lock))
414 return PTR_ERR(src_lock);
415
416 src_exception.state = src_lock->open_context->state;
417
418 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
419 if (IS_ERR(dst_lock)) {
420 err = PTR_ERR(dst_lock);
421 goto out_put_src_lock;
422 }
423
424 dst_exception.state = dst_lock->open_context->state;
425
426 do {
427 inode_lock(file_inode(dst));
428 err = _nfs42_proc_copy(src, src_lock,
429 dst, dst_lock,
430 &args, &res,
431 nss, cnr_stateid, &restart);
432 inode_unlock(file_inode(dst));
433
434 if (err >= 0)
435 break;
436 if (err == -ENOTSUPP &&
437 nfs42_files_from_same_server(src, dst)) {
438 err = -EOPNOTSUPP;
439 break;
440 } else if (err == -EAGAIN) {
441 if (!restart) {
442 dst_exception.retry = 1;
443 continue;
444 }
445 break;
446 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS &&
447 args.sync != res.synchronous) {
448 args.sync = res.synchronous;
449 dst_exception.retry = 1;
450 continue;
451 } else if ((err == -ESTALE ||
452 err == -NFS4ERR_OFFLOAD_DENIED ||
453 err == -ENOTSUPP) &&
454 !nfs42_files_from_same_server(src, dst)) {
455 nfs42_do_offload_cancel_async(src, &args.src_stateid);
456 err = -EOPNOTSUPP;
457 break;
458 }
459
460 err2 = nfs4_handle_exception(server, err, &src_exception);
461 err = nfs4_handle_exception(server, err, &dst_exception);
462 if (!err)
463 err = err2;
464 } while (src_exception.retry || dst_exception.retry);
465
466 nfs_put_lock_context(dst_lock);
467 out_put_src_lock:
468 nfs_put_lock_context(src_lock);
469 return err;
470 }
471
472 struct nfs42_offloadcancel_data {
473 struct nfs_server *seq_server;
474 struct nfs42_offload_status_args args;
475 struct nfs42_offload_status_res res;
476 };
477
nfs42_offload_cancel_prepare(struct rpc_task * task,void * calldata)478 static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
479 {
480 struct nfs42_offloadcancel_data *data = calldata;
481
482 nfs4_setup_sequence(data->seq_server->nfs_client,
483 &data->args.osa_seq_args,
484 &data->res.osr_seq_res, task);
485 }
486
nfs42_offload_cancel_done(struct rpc_task * task,void * calldata)487 static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
488 {
489 struct nfs42_offloadcancel_data *data = calldata;
490
491 nfs41_sequence_done(task, &data->res.osr_seq_res);
492 if (task->tk_status &&
493 nfs4_async_handle_error(task, data->seq_server, NULL,
494 NULL) == -EAGAIN)
495 rpc_restart_call_prepare(task);
496 }
497
nfs42_free_offloadcancel_data(void * data)498 static void nfs42_free_offloadcancel_data(void *data)
499 {
500 kfree(data);
501 }
502
503 static const struct rpc_call_ops nfs42_offload_cancel_ops = {
504 .rpc_call_prepare = nfs42_offload_cancel_prepare,
505 .rpc_call_done = nfs42_offload_cancel_done,
506 .rpc_release = nfs42_free_offloadcancel_data,
507 };
508
nfs42_do_offload_cancel_async(struct file * dst,nfs4_stateid * stateid)509 static int nfs42_do_offload_cancel_async(struct file *dst,
510 nfs4_stateid *stateid)
511 {
512 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
513 struct nfs42_offloadcancel_data *data = NULL;
514 struct nfs_open_context *ctx = nfs_file_open_context(dst);
515 struct rpc_task *task;
516 struct rpc_message msg = {
517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
518 .rpc_cred = ctx->cred,
519 };
520 struct rpc_task_setup task_setup_data = {
521 .rpc_client = dst_server->client,
522 .rpc_message = &msg,
523 .callback_ops = &nfs42_offload_cancel_ops,
524 .workqueue = nfsiod_workqueue,
525 .flags = RPC_TASK_ASYNC,
526 };
527 int status;
528
529 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
530 return -EOPNOTSUPP;
531
532 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
533 if (data == NULL)
534 return -ENOMEM;
535
536 data->seq_server = dst_server;
537 data->args.osa_src_fh = NFS_FH(file_inode(dst));
538 memcpy(&data->args.osa_stateid, stateid,
539 sizeof(data->args.osa_stateid));
540 msg.rpc_argp = &data->args;
541 msg.rpc_resp = &data->res;
542 task_setup_data.callback_data = data;
543 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
544 1, 0);
545 task = rpc_run_task(&task_setup_data);
546 if (IS_ERR(task))
547 return PTR_ERR(task);
548 status = rpc_wait_for_completion_task(task);
549 if (status == -ENOTSUPP)
550 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
551 rpc_put_task(task);
552 return status;
553 }
554
_nfs42_proc_copy_notify(struct file * src,struct file * dst,struct nfs42_copy_notify_args * args,struct nfs42_copy_notify_res * res)555 static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
556 struct nfs42_copy_notify_args *args,
557 struct nfs42_copy_notify_res *res)
558 {
559 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
560 struct rpc_message msg = {
561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
562 .rpc_argp = args,
563 .rpc_resp = res,
564 };
565 int status;
566 struct nfs_open_context *ctx;
567 struct nfs_lock_context *l_ctx;
568
569 ctx = get_nfs_open_context(nfs_file_open_context(src));
570 l_ctx = nfs_get_lock_context(ctx);
571 if (IS_ERR(l_ctx)) {
572 status = PTR_ERR(l_ctx);
573 goto out;
574 }
575
576 status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
577 FMODE_READ);
578 nfs_put_lock_context(l_ctx);
579 if (status) {
580 if (status == -EAGAIN)
581 status = -NFS4ERR_BAD_STATEID;
582 goto out;
583 }
584
585 status = nfs4_call_sync(src_server->client, src_server, &msg,
586 &args->cna_seq_args, &res->cnr_seq_res, 0);
587 if (status == -ENOTSUPP)
588 src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
589
590 out:
591 put_nfs_open_context(nfs_file_open_context(src));
592 return status;
593 }
594
nfs42_proc_copy_notify(struct file * src,struct file * dst,struct nfs42_copy_notify_res * res)595 int nfs42_proc_copy_notify(struct file *src, struct file *dst,
596 struct nfs42_copy_notify_res *res)
597 {
598 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
599 struct nfs42_copy_notify_args *args;
600 struct nfs4_exception exception = {
601 .inode = file_inode(src),
602 };
603 int status;
604
605 if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
606 return -EOPNOTSUPP;
607
608 args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_NOFS);
609 if (args == NULL)
610 return -ENOMEM;
611
612 args->cna_src_fh = NFS_FH(file_inode(src)),
613 args->cna_dst.nl4_type = NL4_NETADDR;
614 nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
615 exception.stateid = &args->cna_src_stateid;
616
617 do {
618 status = _nfs42_proc_copy_notify(src, dst, args, res);
619 if (status == -ENOTSUPP) {
620 status = -EOPNOTSUPP;
621 goto out;
622 }
623 status = nfs4_handle_exception(src_server, status, &exception);
624 } while (exception.retry);
625
626 out:
627 kfree(args);
628 return status;
629 }
630
_nfs42_proc_llseek(struct file * filep,struct nfs_lock_context * lock,loff_t offset,int whence)631 static loff_t _nfs42_proc_llseek(struct file *filep,
632 struct nfs_lock_context *lock, loff_t offset, int whence)
633 {
634 struct inode *inode = file_inode(filep);
635 struct nfs42_seek_args args = {
636 .sa_fh = NFS_FH(inode),
637 .sa_offset = offset,
638 .sa_what = (whence == SEEK_HOLE) ?
639 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
640 };
641 struct nfs42_seek_res res;
642 struct rpc_message msg = {
643 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
644 .rpc_argp = &args,
645 .rpc_resp = &res,
646 };
647 struct nfs_server *server = NFS_SERVER(inode);
648 int status;
649
650 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
651 return -ENOTSUPP;
652
653 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
654 lock, FMODE_READ);
655 if (status) {
656 if (status == -EAGAIN)
657 status = -NFS4ERR_BAD_STATEID;
658 return status;
659 }
660
661 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
662 offset, LLONG_MAX);
663 if (status)
664 return status;
665
666 status = nfs4_call_sync(server->client, server, &msg,
667 &args.seq_args, &res.seq_res, 0);
668 if (status == -ENOTSUPP)
669 server->caps &= ~NFS_CAP_SEEK;
670 if (status)
671 return status;
672
673 if (whence == SEEK_DATA && res.sr_eof)
674 return -NFS4ERR_NXIO;
675 else
676 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
677 }
678
nfs42_proc_llseek(struct file * filep,loff_t offset,int whence)679 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
680 {
681 struct nfs_server *server = NFS_SERVER(file_inode(filep));
682 struct nfs4_exception exception = { };
683 struct nfs_lock_context *lock;
684 loff_t err;
685
686 lock = nfs_get_lock_context(nfs_file_open_context(filep));
687 if (IS_ERR(lock))
688 return PTR_ERR(lock);
689
690 exception.inode = file_inode(filep);
691 exception.state = lock->open_context->state;
692
693 do {
694 err = _nfs42_proc_llseek(filep, lock, offset, whence);
695 if (err >= 0)
696 break;
697 if (err == -ENOTSUPP) {
698 err = -EOPNOTSUPP;
699 break;
700 }
701 err = nfs4_handle_exception(server, err, &exception);
702 } while (exception.retry);
703
704 nfs_put_lock_context(lock);
705 return err;
706 }
707
708
709 static void
nfs42_layoutstat_prepare(struct rpc_task * task,void * calldata)710 nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
711 {
712 struct nfs42_layoutstat_data *data = calldata;
713 struct inode *inode = data->inode;
714 struct nfs_server *server = NFS_SERVER(inode);
715 struct pnfs_layout_hdr *lo;
716
717 spin_lock(&inode->i_lock);
718 lo = NFS_I(inode)->layout;
719 if (!pnfs_layout_is_valid(lo)) {
720 spin_unlock(&inode->i_lock);
721 rpc_exit(task, 0);
722 return;
723 }
724 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
725 spin_unlock(&inode->i_lock);
726 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
727 &data->res.seq_res, task);
728 }
729
730 static void
nfs42_layoutstat_done(struct rpc_task * task,void * calldata)731 nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
732 {
733 struct nfs42_layoutstat_data *data = calldata;
734 struct inode *inode = data->inode;
735 struct pnfs_layout_hdr *lo;
736
737 if (!nfs4_sequence_done(task, &data->res.seq_res))
738 return;
739
740 switch (task->tk_status) {
741 case 0:
742 return;
743 case -NFS4ERR_BADHANDLE:
744 case -ESTALE:
745 pnfs_destroy_layout(NFS_I(inode));
746 break;
747 case -NFS4ERR_EXPIRED:
748 case -NFS4ERR_ADMIN_REVOKED:
749 case -NFS4ERR_DELEG_REVOKED:
750 case -NFS4ERR_STALE_STATEID:
751 case -NFS4ERR_BAD_STATEID:
752 spin_lock(&inode->i_lock);
753 lo = NFS_I(inode)->layout;
754 if (pnfs_layout_is_valid(lo) &&
755 nfs4_stateid_match(&data->args.stateid,
756 &lo->plh_stateid)) {
757 LIST_HEAD(head);
758
759 /*
760 * Mark the bad layout state as invalid, then retry
761 * with the current stateid.
762 */
763 pnfs_mark_layout_stateid_invalid(lo, &head);
764 spin_unlock(&inode->i_lock);
765 pnfs_free_lseg_list(&head);
766 nfs_commit_inode(inode, 0);
767 } else
768 spin_unlock(&inode->i_lock);
769 break;
770 case -NFS4ERR_OLD_STATEID:
771 spin_lock(&inode->i_lock);
772 lo = NFS_I(inode)->layout;
773 if (pnfs_layout_is_valid(lo) &&
774 nfs4_stateid_match_other(&data->args.stateid,
775 &lo->plh_stateid)) {
776 /* Do we need to delay before resending? */
777 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
778 &data->args.stateid))
779 rpc_delay(task, HZ);
780 rpc_restart_call_prepare(task);
781 }
782 spin_unlock(&inode->i_lock);
783 break;
784 case -ENOTSUPP:
785 case -EOPNOTSUPP:
786 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
787 }
788
789 trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
790 }
791
792 static void
nfs42_layoutstat_release(void * calldata)793 nfs42_layoutstat_release(void *calldata)
794 {
795 struct nfs42_layoutstat_data *data = calldata;
796 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
797 int i;
798
799 for (i = 0; i < data->args.num_dev; i++) {
800 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
801 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
802 }
803
804 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
805 smp_mb__before_atomic();
806 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
807 smp_mb__after_atomic();
808 nfs_iput_and_deactive(data->inode);
809 kfree(data->args.devinfo);
810 kfree(data);
811 }
812
813 static const struct rpc_call_ops nfs42_layoutstat_ops = {
814 .rpc_call_prepare = nfs42_layoutstat_prepare,
815 .rpc_call_done = nfs42_layoutstat_done,
816 .rpc_release = nfs42_layoutstat_release,
817 };
818
nfs42_proc_layoutstats_generic(struct nfs_server * server,struct nfs42_layoutstat_data * data)819 int nfs42_proc_layoutstats_generic(struct nfs_server *server,
820 struct nfs42_layoutstat_data *data)
821 {
822 struct rpc_message msg = {
823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
824 .rpc_argp = &data->args,
825 .rpc_resp = &data->res,
826 };
827 struct rpc_task_setup task_setup = {
828 .rpc_client = server->client,
829 .rpc_message = &msg,
830 .callback_ops = &nfs42_layoutstat_ops,
831 .callback_data = data,
832 .flags = RPC_TASK_ASYNC,
833 };
834 struct rpc_task *task;
835
836 data->inode = nfs_igrab_and_active(data->args.inode);
837 if (!data->inode) {
838 nfs42_layoutstat_release(data);
839 return -EAGAIN;
840 }
841 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
842 task = rpc_run_task(&task_setup);
843 if (IS_ERR(task))
844 return PTR_ERR(task);
845 rpc_put_task(task);
846 return 0;
847 }
848
849 static struct nfs42_layouterror_data *
nfs42_alloc_layouterror_data(struct pnfs_layout_segment * lseg,gfp_t gfp_flags)850 nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
851 {
852 struct nfs42_layouterror_data *data;
853 struct inode *inode = lseg->pls_layout->plh_inode;
854
855 data = kzalloc(sizeof(*data), gfp_flags);
856 if (data) {
857 data->args.inode = data->inode = nfs_igrab_and_active(inode);
858 if (data->inode) {
859 data->lseg = pnfs_get_lseg(lseg);
860 if (data->lseg)
861 return data;
862 nfs_iput_and_deactive(data->inode);
863 }
864 kfree(data);
865 }
866 return NULL;
867 }
868
869 static void
nfs42_free_layouterror_data(struct nfs42_layouterror_data * data)870 nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
871 {
872 pnfs_put_lseg(data->lseg);
873 nfs_iput_and_deactive(data->inode);
874 kfree(data);
875 }
876
877 static void
nfs42_layouterror_prepare(struct rpc_task * task,void * calldata)878 nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
879 {
880 struct nfs42_layouterror_data *data = calldata;
881 struct inode *inode = data->inode;
882 struct nfs_server *server = NFS_SERVER(inode);
883 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
884 unsigned i;
885
886 spin_lock(&inode->i_lock);
887 if (!pnfs_layout_is_valid(lo)) {
888 spin_unlock(&inode->i_lock);
889 rpc_exit(task, 0);
890 return;
891 }
892 for (i = 0; i < data->args.num_errors; i++)
893 nfs4_stateid_copy(&data->args.errors[i].stateid,
894 &lo->plh_stateid);
895 spin_unlock(&inode->i_lock);
896 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
897 &data->res.seq_res, task);
898 }
899
900 static void
nfs42_layouterror_done(struct rpc_task * task,void * calldata)901 nfs42_layouterror_done(struct rpc_task *task, void *calldata)
902 {
903 struct nfs42_layouterror_data *data = calldata;
904 struct inode *inode = data->inode;
905 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
906
907 if (!nfs4_sequence_done(task, &data->res.seq_res))
908 return;
909
910 switch (task->tk_status) {
911 case 0:
912 return;
913 case -NFS4ERR_BADHANDLE:
914 case -ESTALE:
915 pnfs_destroy_layout(NFS_I(inode));
916 break;
917 case -NFS4ERR_EXPIRED:
918 case -NFS4ERR_ADMIN_REVOKED:
919 case -NFS4ERR_DELEG_REVOKED:
920 case -NFS4ERR_STALE_STATEID:
921 case -NFS4ERR_BAD_STATEID:
922 spin_lock(&inode->i_lock);
923 if (pnfs_layout_is_valid(lo) &&
924 nfs4_stateid_match(&data->args.errors[0].stateid,
925 &lo->plh_stateid)) {
926 LIST_HEAD(head);
927
928 /*
929 * Mark the bad layout state as invalid, then retry
930 * with the current stateid.
931 */
932 pnfs_mark_layout_stateid_invalid(lo, &head);
933 spin_unlock(&inode->i_lock);
934 pnfs_free_lseg_list(&head);
935 nfs_commit_inode(inode, 0);
936 } else
937 spin_unlock(&inode->i_lock);
938 break;
939 case -NFS4ERR_OLD_STATEID:
940 spin_lock(&inode->i_lock);
941 if (pnfs_layout_is_valid(lo) &&
942 nfs4_stateid_match_other(&data->args.errors[0].stateid,
943 &lo->plh_stateid)) {
944 /* Do we need to delay before resending? */
945 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
946 &data->args.errors[0].stateid))
947 rpc_delay(task, HZ);
948 rpc_restart_call_prepare(task);
949 }
950 spin_unlock(&inode->i_lock);
951 break;
952 case -ENOTSUPP:
953 case -EOPNOTSUPP:
954 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
955 }
956
957 trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
958 task->tk_status);
959 }
960
961 static void
nfs42_layouterror_release(void * calldata)962 nfs42_layouterror_release(void *calldata)
963 {
964 struct nfs42_layouterror_data *data = calldata;
965
966 nfs42_free_layouterror_data(data);
967 }
968
969 static const struct rpc_call_ops nfs42_layouterror_ops = {
970 .rpc_call_prepare = nfs42_layouterror_prepare,
971 .rpc_call_done = nfs42_layouterror_done,
972 .rpc_release = nfs42_layouterror_release,
973 };
974
nfs42_proc_layouterror(struct pnfs_layout_segment * lseg,const struct nfs42_layout_error * errors,size_t n)975 int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
976 const struct nfs42_layout_error *errors, size_t n)
977 {
978 struct inode *inode = lseg->pls_layout->plh_inode;
979 struct nfs42_layouterror_data *data;
980 struct rpc_task *task;
981 struct rpc_message msg = {
982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
983 };
984 struct rpc_task_setup task_setup = {
985 .rpc_message = &msg,
986 .callback_ops = &nfs42_layouterror_ops,
987 .flags = RPC_TASK_ASYNC,
988 };
989 unsigned int i;
990
991 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
992 return -EOPNOTSUPP;
993 if (n > NFS42_LAYOUTERROR_MAX)
994 return -EINVAL;
995 data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
996 if (!data)
997 return -ENOMEM;
998 for (i = 0; i < n; i++) {
999 data->args.errors[i] = errors[i];
1000 data->args.num_errors++;
1001 data->res.num_errors++;
1002 }
1003 msg.rpc_argp = &data->args;
1004 msg.rpc_resp = &data->res;
1005 task_setup.callback_data = data;
1006 task_setup.rpc_client = NFS_SERVER(inode)->client;
1007 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
1008 task = rpc_run_task(&task_setup);
1009 if (IS_ERR(task))
1010 return PTR_ERR(task);
1011 rpc_put_task(task);
1012 return 0;
1013 }
1014 EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
1015
_nfs42_proc_clone(struct rpc_message * msg,struct file * src_f,struct file * dst_f,struct nfs_lock_context * src_lock,struct nfs_lock_context * dst_lock,loff_t src_offset,loff_t dst_offset,loff_t count)1016 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
1017 struct file *dst_f, struct nfs_lock_context *src_lock,
1018 struct nfs_lock_context *dst_lock, loff_t src_offset,
1019 loff_t dst_offset, loff_t count)
1020 {
1021 struct inode *src_inode = file_inode(src_f);
1022 struct inode *dst_inode = file_inode(dst_f);
1023 struct nfs_server *server = NFS_SERVER(dst_inode);
1024 struct nfs42_clone_args args = {
1025 .src_fh = NFS_FH(src_inode),
1026 .dst_fh = NFS_FH(dst_inode),
1027 .src_offset = src_offset,
1028 .dst_offset = dst_offset,
1029 .count = count,
1030 .dst_bitmask = server->cache_consistency_bitmask,
1031 };
1032 struct nfs42_clone_res res = {
1033 .server = server,
1034 };
1035 int status;
1036
1037 msg->rpc_argp = &args;
1038 msg->rpc_resp = &res;
1039
1040 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
1041 src_lock, FMODE_READ);
1042 if (status) {
1043 if (status == -EAGAIN)
1044 status = -NFS4ERR_BAD_STATEID;
1045 return status;
1046 }
1047 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
1048 dst_lock, FMODE_WRITE);
1049 if (status) {
1050 if (status == -EAGAIN)
1051 status = -NFS4ERR_BAD_STATEID;
1052 return status;
1053 }
1054
1055 res.dst_fattr = nfs_alloc_fattr();
1056 if (!res.dst_fattr)
1057 return -ENOMEM;
1058
1059 status = nfs4_call_sync(server->client, server, msg,
1060 &args.seq_args, &res.seq_res, 0);
1061 if (status == 0)
1062 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
1063
1064 kfree(res.dst_fattr);
1065 return status;
1066 }
1067
nfs42_proc_clone(struct file * src_f,struct file * dst_f,loff_t src_offset,loff_t dst_offset,loff_t count)1068 int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
1069 loff_t src_offset, loff_t dst_offset, loff_t count)
1070 {
1071 struct rpc_message msg = {
1072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
1073 };
1074 struct inode *inode = file_inode(src_f);
1075 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
1076 struct nfs_lock_context *src_lock;
1077 struct nfs_lock_context *dst_lock;
1078 struct nfs4_exception src_exception = { };
1079 struct nfs4_exception dst_exception = { };
1080 int err, err2;
1081
1082 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
1083 return -EOPNOTSUPP;
1084
1085 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
1086 if (IS_ERR(src_lock))
1087 return PTR_ERR(src_lock);
1088
1089 src_exception.inode = file_inode(src_f);
1090 src_exception.state = src_lock->open_context->state;
1091
1092 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
1093 if (IS_ERR(dst_lock)) {
1094 err = PTR_ERR(dst_lock);
1095 goto out_put_src_lock;
1096 }
1097
1098 dst_exception.inode = file_inode(dst_f);
1099 dst_exception.state = dst_lock->open_context->state;
1100
1101 do {
1102 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
1103 src_offset, dst_offset, count);
1104 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
1105 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
1106 err = -EOPNOTSUPP;
1107 break;
1108 }
1109
1110 err2 = nfs4_handle_exception(server, err, &src_exception);
1111 err = nfs4_handle_exception(server, err, &dst_exception);
1112 if (!err)
1113 err = err2;
1114 } while (src_exception.retry || dst_exception.retry);
1115
1116 nfs_put_lock_context(dst_lock);
1117 out_put_src_lock:
1118 nfs_put_lock_context(src_lock);
1119 return err;
1120 }
1121
1122 #define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
1123
_nfs42_proc_removexattr(struct inode * inode,const char * name)1124 static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
1125 {
1126 struct nfs_server *server = NFS_SERVER(inode);
1127 struct nfs42_removexattrargs args = {
1128 .fh = NFS_FH(inode),
1129 .xattr_name = name,
1130 };
1131 struct nfs42_removexattrres res;
1132 struct rpc_message msg = {
1133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
1134 .rpc_argp = &args,
1135 .rpc_resp = &res,
1136 };
1137 int ret;
1138 unsigned long timestamp = jiffies;
1139
1140 ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
1141 &res.seq_res, 1);
1142 if (!ret)
1143 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1144
1145 return ret;
1146 }
1147
_nfs42_proc_setxattr(struct inode * inode,const char * name,const void * buf,size_t buflen,int flags)1148 static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
1149 const void *buf, size_t buflen, int flags)
1150 {
1151 struct nfs_server *server = NFS_SERVER(inode);
1152 struct page *pages[NFS4XATTR_MAXPAGES];
1153 struct nfs42_setxattrargs arg = {
1154 .fh = NFS_FH(inode),
1155 .xattr_pages = pages,
1156 .xattr_len = buflen,
1157 .xattr_name = name,
1158 .xattr_flags = flags,
1159 };
1160 struct nfs42_setxattrres res;
1161 struct rpc_message msg = {
1162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
1163 .rpc_argp = &arg,
1164 .rpc_resp = &res,
1165 };
1166 int ret, np;
1167 unsigned long timestamp = jiffies;
1168
1169 if (buflen > server->sxasize)
1170 return -ERANGE;
1171
1172 if (buflen > 0) {
1173 np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
1174 if (np < 0)
1175 return np;
1176 } else
1177 np = 0;
1178
1179 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1180 &res.seq_res, 1);
1181
1182 for (; np > 0; np--)
1183 put_page(pages[np - 1]);
1184
1185 if (!ret)
1186 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1187
1188 return ret;
1189 }
1190
_nfs42_proc_getxattr(struct inode * inode,const char * name,void * buf,size_t buflen)1191 static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
1192 void *buf, size_t buflen)
1193 {
1194 struct nfs_server *server = NFS_SERVER(inode);
1195 struct page *pages[NFS4XATTR_MAXPAGES] = {};
1196 struct nfs42_getxattrargs arg = {
1197 .fh = NFS_FH(inode),
1198 .xattr_pages = pages,
1199 .xattr_len = buflen,
1200 .xattr_name = name,
1201 };
1202 struct nfs42_getxattrres res;
1203 struct rpc_message msg = {
1204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
1205 .rpc_argp = &arg,
1206 .rpc_resp = &res,
1207 };
1208 int ret, np;
1209
1210 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1211 &res.seq_res, 0);
1212 if (ret < 0)
1213 return ret;
1214
1215 /*
1216 * Normally, the caching is done one layer up, but for successful
1217 * RPCS, always cache the result here, even if the caller was
1218 * just querying the length, or if the reply was too big for
1219 * the caller. This avoids a second RPC in the case of the
1220 * common query-alloc-retrieve cycle for xattrs.
1221 *
1222 * Note that xattr_len is always capped to XATTR_SIZE_MAX.
1223 */
1224
1225 nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
1226
1227 if (buflen) {
1228 if (res.xattr_len > buflen)
1229 return -ERANGE;
1230 _copy_from_pages(buf, pages, 0, res.xattr_len);
1231 }
1232
1233 np = DIV_ROUND_UP(res.xattr_len, PAGE_SIZE);
1234 while (--np >= 0)
1235 __free_page(pages[np]);
1236
1237 return res.xattr_len;
1238 }
1239
_nfs42_proc_listxattrs(struct inode * inode,void * buf,size_t buflen,u64 * cookiep,bool * eofp)1240 static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
1241 size_t buflen, u64 *cookiep, bool *eofp)
1242 {
1243 struct nfs_server *server = NFS_SERVER(inode);
1244 struct page **pages;
1245 struct nfs42_listxattrsargs arg = {
1246 .fh = NFS_FH(inode),
1247 .cookie = *cookiep,
1248 };
1249 struct nfs42_listxattrsres res = {
1250 .eof = false,
1251 .xattr_buf = buf,
1252 .xattr_len = buflen,
1253 };
1254 struct rpc_message msg = {
1255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
1256 .rpc_argp = &arg,
1257 .rpc_resp = &res,
1258 };
1259 u32 xdrlen;
1260 int ret, np, i;
1261
1262
1263 ret = -ENOMEM;
1264 res.scratch = alloc_page(GFP_KERNEL);
1265 if (!res.scratch)
1266 goto out;
1267
1268 xdrlen = nfs42_listxattr_xdrsize(buflen);
1269 if (xdrlen > server->lxasize)
1270 xdrlen = server->lxasize;
1271 np = xdrlen / PAGE_SIZE + 1;
1272
1273 pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
1274 if (!pages)
1275 goto out_free_scratch;
1276 for (i = 0; i < np; i++) {
1277 pages[i] = alloc_page(GFP_KERNEL);
1278 if (!pages[i])
1279 goto out_free_pages;
1280 }
1281
1282 arg.xattr_pages = pages;
1283 arg.count = xdrlen;
1284
1285 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1286 &res.seq_res, 0);
1287
1288 if (ret >= 0) {
1289 ret = res.copied;
1290 *cookiep = res.cookie;
1291 *eofp = res.eof;
1292 }
1293
1294 out_free_pages:
1295 while (--np >= 0) {
1296 if (pages[np])
1297 __free_page(pages[np]);
1298 }
1299 kfree(pages);
1300 out_free_scratch:
1301 __free_page(res.scratch);
1302 out:
1303 return ret;
1304
1305 }
1306
nfs42_proc_getxattr(struct inode * inode,const char * name,void * buf,size_t buflen)1307 ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
1308 void *buf, size_t buflen)
1309 {
1310 struct nfs4_exception exception = { };
1311 ssize_t err;
1312
1313 do {
1314 err = _nfs42_proc_getxattr(inode, name, buf, buflen);
1315 if (err >= 0)
1316 break;
1317 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1318 &exception);
1319 } while (exception.retry);
1320
1321 return err;
1322 }
1323
nfs42_proc_setxattr(struct inode * inode,const char * name,const void * buf,size_t buflen,int flags)1324 int nfs42_proc_setxattr(struct inode *inode, const char *name,
1325 const void *buf, size_t buflen, int flags)
1326 {
1327 struct nfs4_exception exception = { };
1328 int err;
1329
1330 do {
1331 err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
1332 if (!err)
1333 break;
1334 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1335 &exception);
1336 } while (exception.retry);
1337
1338 return err;
1339 }
1340
nfs42_proc_listxattrs(struct inode * inode,void * buf,size_t buflen,u64 * cookiep,bool * eofp)1341 ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
1342 size_t buflen, u64 *cookiep, bool *eofp)
1343 {
1344 struct nfs4_exception exception = { };
1345 ssize_t err;
1346
1347 do {
1348 err = _nfs42_proc_listxattrs(inode, buf, buflen,
1349 cookiep, eofp);
1350 if (err >= 0)
1351 break;
1352 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1353 &exception);
1354 } while (exception.retry);
1355
1356 return err;
1357 }
1358
nfs42_proc_removexattr(struct inode * inode,const char * name)1359 int nfs42_proc_removexattr(struct inode *inode, const char *name)
1360 {
1361 struct nfs4_exception exception = { };
1362 int err;
1363
1364 do {
1365 err = _nfs42_proc_removexattr(inode, name);
1366 if (!err)
1367 break;
1368 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1369 &exception);
1370 } while (exception.retry);
1371
1372 return err;
1373 }
1374