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 && !args.sync) {
447 args.sync = true;
448 dst_exception.retry = 1;
449 continue;
450 } else if ((err == -ESTALE ||
451 err == -NFS4ERR_OFFLOAD_DENIED ||
452 err == -ENOTSUPP) &&
453 !nfs42_files_from_same_server(src, dst)) {
454 nfs42_do_offload_cancel_async(src, &args.src_stateid);
455 err = -EOPNOTSUPP;
456 break;
457 }
458
459 err2 = nfs4_handle_exception(server, err, &src_exception);
460 err = nfs4_handle_exception(server, err, &dst_exception);
461 if (!err)
462 err = err2;
463 } while (src_exception.retry || dst_exception.retry);
464
465 nfs_put_lock_context(dst_lock);
466 out_put_src_lock:
467 nfs_put_lock_context(src_lock);
468 return err;
469 }
470
471 struct nfs42_offloadcancel_data {
472 struct nfs_server *seq_server;
473 struct nfs42_offload_status_args args;
474 struct nfs42_offload_status_res res;
475 };
476
nfs42_offload_cancel_prepare(struct rpc_task * task,void * calldata)477 static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
478 {
479 struct nfs42_offloadcancel_data *data = calldata;
480
481 nfs4_setup_sequence(data->seq_server->nfs_client,
482 &data->args.osa_seq_args,
483 &data->res.osr_seq_res, task);
484 }
485
nfs42_offload_cancel_done(struct rpc_task * task,void * calldata)486 static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
487 {
488 struct nfs42_offloadcancel_data *data = calldata;
489
490 nfs41_sequence_done(task, &data->res.osr_seq_res);
491 if (task->tk_status &&
492 nfs4_async_handle_error(task, data->seq_server, NULL,
493 NULL) == -EAGAIN)
494 rpc_restart_call_prepare(task);
495 }
496
nfs42_free_offloadcancel_data(void * data)497 static void nfs42_free_offloadcancel_data(void *data)
498 {
499 kfree(data);
500 }
501
502 static const struct rpc_call_ops nfs42_offload_cancel_ops = {
503 .rpc_call_prepare = nfs42_offload_cancel_prepare,
504 .rpc_call_done = nfs42_offload_cancel_done,
505 .rpc_release = nfs42_free_offloadcancel_data,
506 };
507
nfs42_do_offload_cancel_async(struct file * dst,nfs4_stateid * stateid)508 static int nfs42_do_offload_cancel_async(struct file *dst,
509 nfs4_stateid *stateid)
510 {
511 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
512 struct nfs42_offloadcancel_data *data = NULL;
513 struct nfs_open_context *ctx = nfs_file_open_context(dst);
514 struct rpc_task *task;
515 struct rpc_message msg = {
516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
517 .rpc_cred = ctx->cred,
518 };
519 struct rpc_task_setup task_setup_data = {
520 .rpc_client = dst_server->client,
521 .rpc_message = &msg,
522 .callback_ops = &nfs42_offload_cancel_ops,
523 .workqueue = nfsiod_workqueue,
524 .flags = RPC_TASK_ASYNC,
525 };
526 int status;
527
528 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
529 return -EOPNOTSUPP;
530
531 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
532 if (data == NULL)
533 return -ENOMEM;
534
535 data->seq_server = dst_server;
536 data->args.osa_src_fh = NFS_FH(file_inode(dst));
537 memcpy(&data->args.osa_stateid, stateid,
538 sizeof(data->args.osa_stateid));
539 msg.rpc_argp = &data->args;
540 msg.rpc_resp = &data->res;
541 task_setup_data.callback_data = data;
542 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
543 1, 0);
544 task = rpc_run_task(&task_setup_data);
545 if (IS_ERR(task))
546 return PTR_ERR(task);
547 status = rpc_wait_for_completion_task(task);
548 if (status == -ENOTSUPP)
549 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
550 rpc_put_task(task);
551 return status;
552 }
553
_nfs42_proc_copy_notify(struct file * src,struct file * dst,struct nfs42_copy_notify_args * args,struct nfs42_copy_notify_res * res)554 static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
555 struct nfs42_copy_notify_args *args,
556 struct nfs42_copy_notify_res *res)
557 {
558 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
559 struct rpc_message msg = {
560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
561 .rpc_argp = args,
562 .rpc_resp = res,
563 };
564 int status;
565 struct nfs_open_context *ctx;
566 struct nfs_lock_context *l_ctx;
567
568 ctx = get_nfs_open_context(nfs_file_open_context(src));
569 l_ctx = nfs_get_lock_context(ctx);
570 if (IS_ERR(l_ctx))
571 return PTR_ERR(l_ctx);
572
573 status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
574 FMODE_READ);
575 nfs_put_lock_context(l_ctx);
576 if (status) {
577 if (status == -EAGAIN)
578 status = -NFS4ERR_BAD_STATEID;
579 return status;
580 }
581
582 status = nfs4_call_sync(src_server->client, src_server, &msg,
583 &args->cna_seq_args, &res->cnr_seq_res, 0);
584 if (status == -ENOTSUPP)
585 src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
586
587 put_nfs_open_context(nfs_file_open_context(src));
588 return status;
589 }
590
nfs42_proc_copy_notify(struct file * src,struct file * dst,struct nfs42_copy_notify_res * res)591 int nfs42_proc_copy_notify(struct file *src, struct file *dst,
592 struct nfs42_copy_notify_res *res)
593 {
594 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
595 struct nfs42_copy_notify_args *args;
596 struct nfs4_exception exception = {
597 .inode = file_inode(src),
598 };
599 int status;
600
601 if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
602 return -EOPNOTSUPP;
603
604 args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_NOFS);
605 if (args == NULL)
606 return -ENOMEM;
607
608 args->cna_src_fh = NFS_FH(file_inode(src)),
609 args->cna_dst.nl4_type = NL4_NETADDR;
610 nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
611 exception.stateid = &args->cna_src_stateid;
612
613 do {
614 status = _nfs42_proc_copy_notify(src, dst, args, res);
615 if (status == -ENOTSUPP) {
616 status = -EOPNOTSUPP;
617 goto out;
618 }
619 status = nfs4_handle_exception(src_server, status, &exception);
620 } while (exception.retry);
621
622 out:
623 kfree(args);
624 return status;
625 }
626
_nfs42_proc_llseek(struct file * filep,struct nfs_lock_context * lock,loff_t offset,int whence)627 static loff_t _nfs42_proc_llseek(struct file *filep,
628 struct nfs_lock_context *lock, loff_t offset, int whence)
629 {
630 struct inode *inode = file_inode(filep);
631 struct nfs42_seek_args args = {
632 .sa_fh = NFS_FH(inode),
633 .sa_offset = offset,
634 .sa_what = (whence == SEEK_HOLE) ?
635 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
636 };
637 struct nfs42_seek_res res;
638 struct rpc_message msg = {
639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
640 .rpc_argp = &args,
641 .rpc_resp = &res,
642 };
643 struct nfs_server *server = NFS_SERVER(inode);
644 int status;
645
646 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
647 return -ENOTSUPP;
648
649 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
650 lock, FMODE_READ);
651 if (status) {
652 if (status == -EAGAIN)
653 status = -NFS4ERR_BAD_STATEID;
654 return status;
655 }
656
657 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
658 offset, LLONG_MAX);
659 if (status)
660 return status;
661
662 status = nfs4_call_sync(server->client, server, &msg,
663 &args.seq_args, &res.seq_res, 0);
664 if (status == -ENOTSUPP)
665 server->caps &= ~NFS_CAP_SEEK;
666 if (status)
667 return status;
668
669 if (whence == SEEK_DATA && res.sr_eof)
670 return -NFS4ERR_NXIO;
671 else
672 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
673 }
674
nfs42_proc_llseek(struct file * filep,loff_t offset,int whence)675 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
676 {
677 struct nfs_server *server = NFS_SERVER(file_inode(filep));
678 struct nfs4_exception exception = { };
679 struct nfs_lock_context *lock;
680 loff_t err;
681
682 lock = nfs_get_lock_context(nfs_file_open_context(filep));
683 if (IS_ERR(lock))
684 return PTR_ERR(lock);
685
686 exception.inode = file_inode(filep);
687 exception.state = lock->open_context->state;
688
689 do {
690 err = _nfs42_proc_llseek(filep, lock, offset, whence);
691 if (err >= 0)
692 break;
693 if (err == -ENOTSUPP) {
694 err = -EOPNOTSUPP;
695 break;
696 }
697 err = nfs4_handle_exception(server, err, &exception);
698 } while (exception.retry);
699
700 nfs_put_lock_context(lock);
701 return err;
702 }
703
704
705 static void
nfs42_layoutstat_prepare(struct rpc_task * task,void * calldata)706 nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
707 {
708 struct nfs42_layoutstat_data *data = calldata;
709 struct inode *inode = data->inode;
710 struct nfs_server *server = NFS_SERVER(inode);
711 struct pnfs_layout_hdr *lo;
712
713 spin_lock(&inode->i_lock);
714 lo = NFS_I(inode)->layout;
715 if (!pnfs_layout_is_valid(lo)) {
716 spin_unlock(&inode->i_lock);
717 rpc_exit(task, 0);
718 return;
719 }
720 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
721 spin_unlock(&inode->i_lock);
722 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
723 &data->res.seq_res, task);
724 }
725
726 static void
nfs42_layoutstat_done(struct rpc_task * task,void * calldata)727 nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
728 {
729 struct nfs42_layoutstat_data *data = calldata;
730 struct inode *inode = data->inode;
731 struct pnfs_layout_hdr *lo;
732
733 if (!nfs4_sequence_done(task, &data->res.seq_res))
734 return;
735
736 switch (task->tk_status) {
737 case 0:
738 return;
739 case -NFS4ERR_BADHANDLE:
740 case -ESTALE:
741 pnfs_destroy_layout(NFS_I(inode));
742 break;
743 case -NFS4ERR_EXPIRED:
744 case -NFS4ERR_ADMIN_REVOKED:
745 case -NFS4ERR_DELEG_REVOKED:
746 case -NFS4ERR_STALE_STATEID:
747 case -NFS4ERR_BAD_STATEID:
748 spin_lock(&inode->i_lock);
749 lo = NFS_I(inode)->layout;
750 if (pnfs_layout_is_valid(lo) &&
751 nfs4_stateid_match(&data->args.stateid,
752 &lo->plh_stateid)) {
753 LIST_HEAD(head);
754
755 /*
756 * Mark the bad layout state as invalid, then retry
757 * with the current stateid.
758 */
759 pnfs_mark_layout_stateid_invalid(lo, &head);
760 spin_unlock(&inode->i_lock);
761 pnfs_free_lseg_list(&head);
762 nfs_commit_inode(inode, 0);
763 } else
764 spin_unlock(&inode->i_lock);
765 break;
766 case -NFS4ERR_OLD_STATEID:
767 spin_lock(&inode->i_lock);
768 lo = NFS_I(inode)->layout;
769 if (pnfs_layout_is_valid(lo) &&
770 nfs4_stateid_match_other(&data->args.stateid,
771 &lo->plh_stateid)) {
772 /* Do we need to delay before resending? */
773 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
774 &data->args.stateid))
775 rpc_delay(task, HZ);
776 rpc_restart_call_prepare(task);
777 }
778 spin_unlock(&inode->i_lock);
779 break;
780 case -ENOTSUPP:
781 case -EOPNOTSUPP:
782 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
783 }
784
785 trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
786 }
787
788 static void
nfs42_layoutstat_release(void * calldata)789 nfs42_layoutstat_release(void *calldata)
790 {
791 struct nfs42_layoutstat_data *data = calldata;
792 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
793 int i;
794
795 for (i = 0; i < data->args.num_dev; i++) {
796 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
797 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
798 }
799
800 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
801 smp_mb__before_atomic();
802 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
803 smp_mb__after_atomic();
804 nfs_iput_and_deactive(data->inode);
805 kfree(data->args.devinfo);
806 kfree(data);
807 }
808
809 static const struct rpc_call_ops nfs42_layoutstat_ops = {
810 .rpc_call_prepare = nfs42_layoutstat_prepare,
811 .rpc_call_done = nfs42_layoutstat_done,
812 .rpc_release = nfs42_layoutstat_release,
813 };
814
nfs42_proc_layoutstats_generic(struct nfs_server * server,struct nfs42_layoutstat_data * data)815 int nfs42_proc_layoutstats_generic(struct nfs_server *server,
816 struct nfs42_layoutstat_data *data)
817 {
818 struct rpc_message msg = {
819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
820 .rpc_argp = &data->args,
821 .rpc_resp = &data->res,
822 };
823 struct rpc_task_setup task_setup = {
824 .rpc_client = server->client,
825 .rpc_message = &msg,
826 .callback_ops = &nfs42_layoutstat_ops,
827 .callback_data = data,
828 .flags = RPC_TASK_ASYNC,
829 };
830 struct rpc_task *task;
831
832 data->inode = nfs_igrab_and_active(data->args.inode);
833 if (!data->inode) {
834 nfs42_layoutstat_release(data);
835 return -EAGAIN;
836 }
837 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
838 task = rpc_run_task(&task_setup);
839 if (IS_ERR(task))
840 return PTR_ERR(task);
841 rpc_put_task(task);
842 return 0;
843 }
844
845 static struct nfs42_layouterror_data *
nfs42_alloc_layouterror_data(struct pnfs_layout_segment * lseg,gfp_t gfp_flags)846 nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
847 {
848 struct nfs42_layouterror_data *data;
849 struct inode *inode = lseg->pls_layout->plh_inode;
850
851 data = kzalloc(sizeof(*data), gfp_flags);
852 if (data) {
853 data->args.inode = data->inode = nfs_igrab_and_active(inode);
854 if (data->inode) {
855 data->lseg = pnfs_get_lseg(lseg);
856 if (data->lseg)
857 return data;
858 nfs_iput_and_deactive(data->inode);
859 }
860 kfree(data);
861 }
862 return NULL;
863 }
864
865 static void
nfs42_free_layouterror_data(struct nfs42_layouterror_data * data)866 nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
867 {
868 pnfs_put_lseg(data->lseg);
869 nfs_iput_and_deactive(data->inode);
870 kfree(data);
871 }
872
873 static void
nfs42_layouterror_prepare(struct rpc_task * task,void * calldata)874 nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
875 {
876 struct nfs42_layouterror_data *data = calldata;
877 struct inode *inode = data->inode;
878 struct nfs_server *server = NFS_SERVER(inode);
879 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
880 unsigned i;
881
882 spin_lock(&inode->i_lock);
883 if (!pnfs_layout_is_valid(lo)) {
884 spin_unlock(&inode->i_lock);
885 rpc_exit(task, 0);
886 return;
887 }
888 for (i = 0; i < data->args.num_errors; i++)
889 nfs4_stateid_copy(&data->args.errors[i].stateid,
890 &lo->plh_stateid);
891 spin_unlock(&inode->i_lock);
892 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
893 &data->res.seq_res, task);
894 }
895
896 static void
nfs42_layouterror_done(struct rpc_task * task,void * calldata)897 nfs42_layouterror_done(struct rpc_task *task, void *calldata)
898 {
899 struct nfs42_layouterror_data *data = calldata;
900 struct inode *inode = data->inode;
901 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
902
903 if (!nfs4_sequence_done(task, &data->res.seq_res))
904 return;
905
906 switch (task->tk_status) {
907 case 0:
908 return;
909 case -NFS4ERR_BADHANDLE:
910 case -ESTALE:
911 pnfs_destroy_layout(NFS_I(inode));
912 break;
913 case -NFS4ERR_EXPIRED:
914 case -NFS4ERR_ADMIN_REVOKED:
915 case -NFS4ERR_DELEG_REVOKED:
916 case -NFS4ERR_STALE_STATEID:
917 case -NFS4ERR_BAD_STATEID:
918 spin_lock(&inode->i_lock);
919 if (pnfs_layout_is_valid(lo) &&
920 nfs4_stateid_match(&data->args.errors[0].stateid,
921 &lo->plh_stateid)) {
922 LIST_HEAD(head);
923
924 /*
925 * Mark the bad layout state as invalid, then retry
926 * with the current stateid.
927 */
928 pnfs_mark_layout_stateid_invalid(lo, &head);
929 spin_unlock(&inode->i_lock);
930 pnfs_free_lseg_list(&head);
931 nfs_commit_inode(inode, 0);
932 } else
933 spin_unlock(&inode->i_lock);
934 break;
935 case -NFS4ERR_OLD_STATEID:
936 spin_lock(&inode->i_lock);
937 if (pnfs_layout_is_valid(lo) &&
938 nfs4_stateid_match_other(&data->args.errors[0].stateid,
939 &lo->plh_stateid)) {
940 /* Do we need to delay before resending? */
941 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
942 &data->args.errors[0].stateid))
943 rpc_delay(task, HZ);
944 rpc_restart_call_prepare(task);
945 }
946 spin_unlock(&inode->i_lock);
947 break;
948 case -ENOTSUPP:
949 case -EOPNOTSUPP:
950 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
951 }
952
953 trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
954 task->tk_status);
955 }
956
957 static void
nfs42_layouterror_release(void * calldata)958 nfs42_layouterror_release(void *calldata)
959 {
960 struct nfs42_layouterror_data *data = calldata;
961
962 nfs42_free_layouterror_data(data);
963 }
964
965 static const struct rpc_call_ops nfs42_layouterror_ops = {
966 .rpc_call_prepare = nfs42_layouterror_prepare,
967 .rpc_call_done = nfs42_layouterror_done,
968 .rpc_release = nfs42_layouterror_release,
969 };
970
nfs42_proc_layouterror(struct pnfs_layout_segment * lseg,const struct nfs42_layout_error * errors,size_t n)971 int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
972 const struct nfs42_layout_error *errors, size_t n)
973 {
974 struct inode *inode = lseg->pls_layout->plh_inode;
975 struct nfs42_layouterror_data *data;
976 struct rpc_task *task;
977 struct rpc_message msg = {
978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
979 };
980 struct rpc_task_setup task_setup = {
981 .rpc_message = &msg,
982 .callback_ops = &nfs42_layouterror_ops,
983 .flags = RPC_TASK_ASYNC,
984 };
985 unsigned int i;
986
987 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
988 return -EOPNOTSUPP;
989 if (n > NFS42_LAYOUTERROR_MAX)
990 return -EINVAL;
991 data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
992 if (!data)
993 return -ENOMEM;
994 for (i = 0; i < n; i++) {
995 data->args.errors[i] = errors[i];
996 data->args.num_errors++;
997 data->res.num_errors++;
998 }
999 msg.rpc_argp = &data->args;
1000 msg.rpc_resp = &data->res;
1001 task_setup.callback_data = data;
1002 task_setup.rpc_client = NFS_SERVER(inode)->client;
1003 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
1004 task = rpc_run_task(&task_setup);
1005 if (IS_ERR(task))
1006 return PTR_ERR(task);
1007 rpc_put_task(task);
1008 return 0;
1009 }
1010 EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
1011
_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)1012 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
1013 struct file *dst_f, struct nfs_lock_context *src_lock,
1014 struct nfs_lock_context *dst_lock, loff_t src_offset,
1015 loff_t dst_offset, loff_t count)
1016 {
1017 struct inode *src_inode = file_inode(src_f);
1018 struct inode *dst_inode = file_inode(dst_f);
1019 struct nfs_server *server = NFS_SERVER(dst_inode);
1020 struct nfs42_clone_args args = {
1021 .src_fh = NFS_FH(src_inode),
1022 .dst_fh = NFS_FH(dst_inode),
1023 .src_offset = src_offset,
1024 .dst_offset = dst_offset,
1025 .count = count,
1026 .dst_bitmask = server->cache_consistency_bitmask,
1027 };
1028 struct nfs42_clone_res res = {
1029 .server = server,
1030 };
1031 int status;
1032
1033 msg->rpc_argp = &args;
1034 msg->rpc_resp = &res;
1035
1036 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
1037 src_lock, FMODE_READ);
1038 if (status) {
1039 if (status == -EAGAIN)
1040 status = -NFS4ERR_BAD_STATEID;
1041 return status;
1042 }
1043 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
1044 dst_lock, FMODE_WRITE);
1045 if (status) {
1046 if (status == -EAGAIN)
1047 status = -NFS4ERR_BAD_STATEID;
1048 return status;
1049 }
1050
1051 res.dst_fattr = nfs_alloc_fattr();
1052 if (!res.dst_fattr)
1053 return -ENOMEM;
1054
1055 status = nfs4_call_sync(server->client, server, msg,
1056 &args.seq_args, &res.seq_res, 0);
1057 if (status == 0)
1058 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
1059
1060 kfree(res.dst_fattr);
1061 return status;
1062 }
1063
nfs42_proc_clone(struct file * src_f,struct file * dst_f,loff_t src_offset,loff_t dst_offset,loff_t count)1064 int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
1065 loff_t src_offset, loff_t dst_offset, loff_t count)
1066 {
1067 struct rpc_message msg = {
1068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
1069 };
1070 struct inode *inode = file_inode(src_f);
1071 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
1072 struct nfs_lock_context *src_lock;
1073 struct nfs_lock_context *dst_lock;
1074 struct nfs4_exception src_exception = { };
1075 struct nfs4_exception dst_exception = { };
1076 int err, err2;
1077
1078 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
1079 return -EOPNOTSUPP;
1080
1081 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
1082 if (IS_ERR(src_lock))
1083 return PTR_ERR(src_lock);
1084
1085 src_exception.inode = file_inode(src_f);
1086 src_exception.state = src_lock->open_context->state;
1087
1088 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
1089 if (IS_ERR(dst_lock)) {
1090 err = PTR_ERR(dst_lock);
1091 goto out_put_src_lock;
1092 }
1093
1094 dst_exception.inode = file_inode(dst_f);
1095 dst_exception.state = dst_lock->open_context->state;
1096
1097 do {
1098 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
1099 src_offset, dst_offset, count);
1100 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
1101 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
1102 err = -EOPNOTSUPP;
1103 break;
1104 }
1105
1106 err2 = nfs4_handle_exception(server, err, &src_exception);
1107 err = nfs4_handle_exception(server, err, &dst_exception);
1108 if (!err)
1109 err = err2;
1110 } while (src_exception.retry || dst_exception.retry);
1111
1112 nfs_put_lock_context(dst_lock);
1113 out_put_src_lock:
1114 nfs_put_lock_context(src_lock);
1115 return err;
1116 }
1117
1118 #define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
1119
_nfs42_proc_removexattr(struct inode * inode,const char * name)1120 static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
1121 {
1122 struct nfs_server *server = NFS_SERVER(inode);
1123 struct nfs42_removexattrargs args = {
1124 .fh = NFS_FH(inode),
1125 .xattr_name = name,
1126 };
1127 struct nfs42_removexattrres res;
1128 struct rpc_message msg = {
1129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
1130 .rpc_argp = &args,
1131 .rpc_resp = &res,
1132 };
1133 int ret;
1134 unsigned long timestamp = jiffies;
1135
1136 ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
1137 &res.seq_res, 1);
1138 if (!ret)
1139 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1140
1141 return ret;
1142 }
1143
_nfs42_proc_setxattr(struct inode * inode,const char * name,const void * buf,size_t buflen,int flags)1144 static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
1145 const void *buf, size_t buflen, int flags)
1146 {
1147 struct nfs_server *server = NFS_SERVER(inode);
1148 struct page *pages[NFS4XATTR_MAXPAGES];
1149 struct nfs42_setxattrargs arg = {
1150 .fh = NFS_FH(inode),
1151 .xattr_pages = pages,
1152 .xattr_len = buflen,
1153 .xattr_name = name,
1154 .xattr_flags = flags,
1155 };
1156 struct nfs42_setxattrres res;
1157 struct rpc_message msg = {
1158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
1159 .rpc_argp = &arg,
1160 .rpc_resp = &res,
1161 };
1162 int ret, np;
1163 unsigned long timestamp = jiffies;
1164
1165 if (buflen > server->sxasize)
1166 return -ERANGE;
1167
1168 if (buflen > 0) {
1169 np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
1170 if (np < 0)
1171 return np;
1172 } else
1173 np = 0;
1174
1175 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1176 &res.seq_res, 1);
1177
1178 for (; np > 0; np--)
1179 put_page(pages[np - 1]);
1180
1181 if (!ret)
1182 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1183
1184 return ret;
1185 }
1186
_nfs42_proc_getxattr(struct inode * inode,const char * name,void * buf,size_t buflen)1187 static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
1188 void *buf, size_t buflen)
1189 {
1190 struct nfs_server *server = NFS_SERVER(inode);
1191 struct page *pages[NFS4XATTR_MAXPAGES] = {};
1192 struct nfs42_getxattrargs arg = {
1193 .fh = NFS_FH(inode),
1194 .xattr_pages = pages,
1195 .xattr_len = buflen,
1196 .xattr_name = name,
1197 };
1198 struct nfs42_getxattrres res;
1199 struct rpc_message msg = {
1200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
1201 .rpc_argp = &arg,
1202 .rpc_resp = &res,
1203 };
1204 int ret, np;
1205
1206 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1207 &res.seq_res, 0);
1208 if (ret < 0)
1209 return ret;
1210
1211 /*
1212 * Normally, the caching is done one layer up, but for successful
1213 * RPCS, always cache the result here, even if the caller was
1214 * just querying the length, or if the reply was too big for
1215 * the caller. This avoids a second RPC in the case of the
1216 * common query-alloc-retrieve cycle for xattrs.
1217 *
1218 * Note that xattr_len is always capped to XATTR_SIZE_MAX.
1219 */
1220
1221 nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
1222
1223 if (buflen) {
1224 if (res.xattr_len > buflen)
1225 return -ERANGE;
1226 _copy_from_pages(buf, pages, 0, res.xattr_len);
1227 }
1228
1229 np = DIV_ROUND_UP(res.xattr_len, PAGE_SIZE);
1230 while (--np >= 0)
1231 __free_page(pages[np]);
1232
1233 return res.xattr_len;
1234 }
1235
_nfs42_proc_listxattrs(struct inode * inode,void * buf,size_t buflen,u64 * cookiep,bool * eofp)1236 static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
1237 size_t buflen, u64 *cookiep, bool *eofp)
1238 {
1239 struct nfs_server *server = NFS_SERVER(inode);
1240 struct page **pages;
1241 struct nfs42_listxattrsargs arg = {
1242 .fh = NFS_FH(inode),
1243 .cookie = *cookiep,
1244 };
1245 struct nfs42_listxattrsres res = {
1246 .eof = false,
1247 .xattr_buf = buf,
1248 .xattr_len = buflen,
1249 };
1250 struct rpc_message msg = {
1251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
1252 .rpc_argp = &arg,
1253 .rpc_resp = &res,
1254 };
1255 u32 xdrlen;
1256 int ret, np, i;
1257
1258
1259 ret = -ENOMEM;
1260 res.scratch = alloc_page(GFP_KERNEL);
1261 if (!res.scratch)
1262 goto out;
1263
1264 xdrlen = nfs42_listxattr_xdrsize(buflen);
1265 if (xdrlen > server->lxasize)
1266 xdrlen = server->lxasize;
1267 np = xdrlen / PAGE_SIZE + 1;
1268
1269 pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
1270 if (!pages)
1271 goto out_free_scratch;
1272 for (i = 0; i < np; i++) {
1273 pages[i] = alloc_page(GFP_KERNEL);
1274 if (!pages[i])
1275 goto out_free_pages;
1276 }
1277
1278 arg.xattr_pages = pages;
1279 arg.count = xdrlen;
1280
1281 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1282 &res.seq_res, 0);
1283
1284 if (ret >= 0) {
1285 ret = res.copied;
1286 *cookiep = res.cookie;
1287 *eofp = res.eof;
1288 }
1289
1290 out_free_pages:
1291 while (--np >= 0) {
1292 if (pages[np])
1293 __free_page(pages[np]);
1294 }
1295 kfree(pages);
1296 out_free_scratch:
1297 __free_page(res.scratch);
1298 out:
1299 return ret;
1300
1301 }
1302
nfs42_proc_getxattr(struct inode * inode,const char * name,void * buf,size_t buflen)1303 ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
1304 void *buf, size_t buflen)
1305 {
1306 struct nfs4_exception exception = { };
1307 ssize_t err;
1308
1309 do {
1310 err = _nfs42_proc_getxattr(inode, name, buf, buflen);
1311 if (err >= 0)
1312 break;
1313 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1314 &exception);
1315 } while (exception.retry);
1316
1317 return err;
1318 }
1319
nfs42_proc_setxattr(struct inode * inode,const char * name,const void * buf,size_t buflen,int flags)1320 int nfs42_proc_setxattr(struct inode *inode, const char *name,
1321 const void *buf, size_t buflen, int flags)
1322 {
1323 struct nfs4_exception exception = { };
1324 int err;
1325
1326 do {
1327 err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
1328 if (!err)
1329 break;
1330 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1331 &exception);
1332 } while (exception.retry);
1333
1334 return err;
1335 }
1336
nfs42_proc_listxattrs(struct inode * inode,void * buf,size_t buflen,u64 * cookiep,bool * eofp)1337 ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
1338 size_t buflen, u64 *cookiep, bool *eofp)
1339 {
1340 struct nfs4_exception exception = { };
1341 ssize_t err;
1342
1343 do {
1344 err = _nfs42_proc_listxattrs(inode, buf, buflen,
1345 cookiep, eofp);
1346 if (err >= 0)
1347 break;
1348 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1349 &exception);
1350 } while (exception.retry);
1351
1352 return err;
1353 }
1354
nfs42_proc_removexattr(struct inode * inode,const char * name)1355 int nfs42_proc_removexattr(struct inode *inode, const char *name)
1356 {
1357 struct nfs4_exception exception = { };
1358 int err;
1359
1360 do {
1361 err = _nfs42_proc_removexattr(inode, name);
1362 if (!err)
1363 break;
1364 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1365 &exception);
1366 } while (exception.retry);
1367
1368 return err;
1369 }
1370