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[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,
85 NFS_INO_REVAL_FORCED | NFS_INO_INVALID_MODE);
86 spin_unlock(&inode->i_lock);
87 }
88 status = nfs_post_op_update_inode_force_wcc(inode,
89 res.falloc_fattr);
90 }
91 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE])
92 trace_nfs4_fallocate(inode, &args, status);
93 else
94 trace_nfs4_deallocate(inode, &args, status);
95 kfree(res.falloc_fattr);
96 return status;
97 }
98
nfs42_proc_fallocate(struct rpc_message * msg,struct file * filep,loff_t offset,loff_t len)99 static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
100 loff_t offset, loff_t len)
101 {
102 struct inode *inode = file_inode(filep);
103 struct nfs_server *server = NFS_SERVER(inode);
104 struct nfs4_exception exception = { };
105 struct nfs_lock_context *lock;
106 int err;
107
108 lock = nfs_get_lock_context(nfs_file_open_context(filep));
109 if (IS_ERR(lock))
110 return PTR_ERR(lock);
111
112 exception.inode = inode;
113 exception.state = lock->open_context->state;
114
115 nfs_file_block_o_direct(NFS_I(inode));
116 err = nfs_sync_inode(inode);
117 if (err)
118 goto out;
119
120 do {
121 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
122 if (err == -ENOTSUPP) {
123 err = -EOPNOTSUPP;
124 break;
125 }
126 err = nfs4_handle_exception(server, err, &exception);
127 } while (exception.retry);
128 out:
129 nfs_put_lock_context(lock);
130 return err;
131 }
132
nfs42_proc_allocate(struct file * filep,loff_t offset,loff_t len)133 int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
134 {
135 struct rpc_message msg = {
136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
137 };
138 struct inode *inode = file_inode(filep);
139 int err;
140
141 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
142 return -EOPNOTSUPP;
143
144 inode_lock(inode);
145
146 err = nfs42_proc_fallocate(&msg, filep, offset, len);
147 if (err == -EOPNOTSUPP)
148 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
149
150 inode_unlock(inode);
151 return err;
152 }
153
nfs42_proc_deallocate(struct file * filep,loff_t offset,loff_t len)154 int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
155 {
156 struct rpc_message msg = {
157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
158 };
159 struct inode *inode = file_inode(filep);
160 int err;
161
162 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
163 return -EOPNOTSUPP;
164
165 inode_lock(inode);
166
167 err = nfs42_proc_fallocate(&msg, filep, offset, len);
168 if (err == 0)
169 truncate_pagecache_range(inode, offset, (offset + len) -1);
170 if (err == -EOPNOTSUPP)
171 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
172
173 inode_unlock(inode);
174 return err;
175 }
176
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)177 static int handle_async_copy(struct nfs42_copy_res *res,
178 struct nfs_server *dst_server,
179 struct nfs_server *src_server,
180 struct file *src,
181 struct file *dst,
182 nfs4_stateid *src_stateid,
183 bool *restart)
184 {
185 struct nfs4_copy_state *copy, *tmp_copy = NULL, *iter;
186 int status = NFS4_OK;
187 struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
188 struct nfs_open_context *src_ctx = nfs_file_open_context(src);
189
190 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_KERNEL);
191 if (!copy)
192 return -ENOMEM;
193
194 spin_lock(&dst_server->nfs_client->cl_lock);
195 list_for_each_entry(iter,
196 &dst_server->nfs_client->pending_cb_stateids,
197 copies) {
198 if (memcmp(&res->write_res.stateid, &iter->stateid,
199 NFS4_STATEID_SIZE))
200 continue;
201 tmp_copy = iter;
202 list_del(&iter->copies);
203 break;
204 }
205 if (tmp_copy) {
206 spin_unlock(&dst_server->nfs_client->cl_lock);
207 kfree(copy);
208 copy = tmp_copy;
209 goto out;
210 }
211
212 memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
213 init_completion(©->completion);
214 copy->parent_dst_state = dst_ctx->state;
215 copy->parent_src_state = src_ctx->state;
216
217 list_add_tail(©->copies, &dst_server->ss_copies);
218 spin_unlock(&dst_server->nfs_client->cl_lock);
219
220 if (dst_server != src_server) {
221 spin_lock(&src_server->nfs_client->cl_lock);
222 list_add_tail(©->src_copies, &src_server->ss_src_copies);
223 spin_unlock(&src_server->nfs_client->cl_lock);
224 }
225
226 status = wait_for_completion_interruptible(©->completion);
227 spin_lock(&dst_server->nfs_client->cl_lock);
228 list_del_init(©->copies);
229 spin_unlock(&dst_server->nfs_client->cl_lock);
230 if (dst_server != src_server) {
231 spin_lock(&src_server->nfs_client->cl_lock);
232 list_del_init(©->src_copies);
233 spin_unlock(&src_server->nfs_client->cl_lock);
234 }
235 if (status == -ERESTARTSYS) {
236 goto out_cancel;
237 } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
238 status = -EAGAIN;
239 *restart = true;
240 goto out_cancel;
241 }
242 out:
243 res->write_res.count = copy->count;
244 memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf));
245 status = -copy->error;
246
247 out_free:
248 kfree(copy);
249 return status;
250 out_cancel:
251 nfs42_do_offload_cancel_async(dst, ©->stateid);
252 if (!nfs42_files_from_same_server(src, dst))
253 nfs42_do_offload_cancel_async(src, src_stateid);
254 goto out_free;
255 }
256
process_copy_commit(struct file * dst,loff_t pos_dst,struct nfs42_copy_res * res)257 static int process_copy_commit(struct file *dst, loff_t pos_dst,
258 struct nfs42_copy_res *res)
259 {
260 struct nfs_commitres cres;
261 int status = -ENOMEM;
262
263 cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_KERNEL);
264 if (!cres.verf)
265 goto out;
266
267 status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
268 if (status)
269 goto out_free;
270 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
271 &cres.verf->verifier)) {
272 dprintk("commit verf differs from copy verf\n");
273 status = -EAGAIN;
274 }
275 out_free:
276 kfree(cres.verf);
277 out:
278 return status;
279 }
280
281 /**
282 * nfs42_copy_dest_done - perform inode cache updates after clone/copy offload
283 * @inode: pointer to destination inode
284 * @pos: destination offset
285 * @len: copy length
286 *
287 * Punch a hole in the inode page cache, so that the NFS client will
288 * know to retrieve new data.
289 * Update the file size if necessary, and then mark the inode as having
290 * invalid cached values for change attribute, ctime, mtime and space used.
291 */
nfs42_copy_dest_done(struct inode * inode,loff_t pos,loff_t len)292 static void nfs42_copy_dest_done(struct inode *inode, loff_t pos, loff_t len)
293 {
294 loff_t newsize = pos + len;
295 loff_t end = newsize - 1;
296
297 WARN_ON_ONCE(invalidate_inode_pages2_range(inode->i_mapping,
298 pos >> PAGE_SHIFT, end >> PAGE_SHIFT));
299
300 spin_lock(&inode->i_lock);
301 if (newsize > i_size_read(inode))
302 i_size_write(inode, newsize);
303 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
304 NFS_INO_INVALID_CTIME |
305 NFS_INO_INVALID_MTIME |
306 NFS_INO_INVALID_BLOCKS);
307 spin_unlock(&inode->i_lock);
308 }
309
_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)310 static ssize_t _nfs42_proc_copy(struct file *src,
311 struct nfs_lock_context *src_lock,
312 struct file *dst,
313 struct nfs_lock_context *dst_lock,
314 struct nfs42_copy_args *args,
315 struct nfs42_copy_res *res,
316 struct nl4_server *nss,
317 nfs4_stateid *cnr_stateid,
318 bool *restart)
319 {
320 struct rpc_message msg = {
321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
322 .rpc_argp = args,
323 .rpc_resp = res,
324 };
325 struct inode *dst_inode = file_inode(dst);
326 struct inode *src_inode = file_inode(src);
327 struct nfs_server *dst_server = NFS_SERVER(dst_inode);
328 struct nfs_server *src_server = NFS_SERVER(src_inode);
329 loff_t pos_src = args->src_pos;
330 loff_t pos_dst = args->dst_pos;
331 size_t count = args->count;
332 ssize_t status;
333
334 if (nss) {
335 args->cp_src = nss;
336 nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
337 } else {
338 status = nfs4_set_rw_stateid(&args->src_stateid,
339 src_lock->open_context, src_lock, FMODE_READ);
340 if (status) {
341 if (status == -EAGAIN)
342 status = -NFS4ERR_BAD_STATEID;
343 return status;
344 }
345 }
346 status = nfs_filemap_write_and_wait_range(src->f_mapping,
347 pos_src, pos_src + (loff_t)count - 1);
348 if (status)
349 return status;
350
351 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
352 dst_lock, FMODE_WRITE);
353 if (status) {
354 if (status == -EAGAIN)
355 status = -NFS4ERR_BAD_STATEID;
356 return status;
357 }
358
359 nfs_file_block_o_direct(NFS_I(dst_inode));
360 status = nfs_sync_inode(dst_inode);
361 if (status)
362 return status;
363
364 res->commit_res.verf = NULL;
365 if (args->sync) {
366 res->commit_res.verf =
367 kzalloc(sizeof(struct nfs_writeverf), GFP_KERNEL);
368 if (!res->commit_res.verf)
369 return -ENOMEM;
370 }
371 set_bit(NFS_CLNT_SRC_SSC_COPY_STATE,
372 &src_lock->open_context->state->flags);
373 set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
374 &dst_lock->open_context->state->flags);
375
376 status = nfs4_call_sync(dst_server->client, dst_server, &msg,
377 &args->seq_args, &res->seq_res, 0);
378 trace_nfs4_copy(src_inode, dst_inode, args, res, nss, status);
379 if (status == -ENOTSUPP)
380 dst_server->caps &= ~NFS_CAP_COPY;
381 if (status)
382 goto out;
383
384 if (args->sync &&
385 nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
386 &res->commit_res.verf->verifier)) {
387 status = -EAGAIN;
388 goto out;
389 }
390
391 if (!res->synchronous) {
392 status = handle_async_copy(res, dst_server, src_server, src,
393 dst, &args->src_stateid, restart);
394 if (status)
395 goto out;
396 }
397
398 if ((!res->synchronous || !args->sync) &&
399 res->write_res.verifier.committed != NFS_FILE_SYNC) {
400 status = process_copy_commit(dst, pos_dst, res);
401 if (status)
402 goto out;
403 }
404
405 nfs42_copy_dest_done(dst_inode, pos_dst, res->write_res.count);
406 nfs_invalidate_atime(src_inode);
407 status = res->write_res.count;
408 out:
409 if (args->sync)
410 kfree(res->commit_res.verf);
411 return status;
412 }
413
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)414 ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
415 struct file *dst, loff_t pos_dst, size_t count,
416 struct nl4_server *nss,
417 nfs4_stateid *cnr_stateid, bool sync)
418 {
419 struct nfs_server *server = NFS_SERVER(file_inode(dst));
420 struct nfs_lock_context *src_lock;
421 struct nfs_lock_context *dst_lock;
422 struct nfs42_copy_args args = {
423 .src_fh = NFS_FH(file_inode(src)),
424 .src_pos = pos_src,
425 .dst_fh = NFS_FH(file_inode(dst)),
426 .dst_pos = pos_dst,
427 .count = count,
428 .sync = sync,
429 };
430 struct nfs42_copy_res res;
431 struct nfs4_exception src_exception = {
432 .inode = file_inode(src),
433 .stateid = &args.src_stateid,
434 };
435 struct nfs4_exception dst_exception = {
436 .inode = file_inode(dst),
437 .stateid = &args.dst_stateid,
438 };
439 ssize_t err, err2;
440 bool restart = false;
441
442 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
443 if (IS_ERR(src_lock))
444 return PTR_ERR(src_lock);
445
446 src_exception.state = src_lock->open_context->state;
447
448 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
449 if (IS_ERR(dst_lock)) {
450 err = PTR_ERR(dst_lock);
451 goto out_put_src_lock;
452 }
453
454 dst_exception.state = dst_lock->open_context->state;
455
456 do {
457 inode_lock(file_inode(dst));
458 err = _nfs42_proc_copy(src, src_lock,
459 dst, dst_lock,
460 &args, &res,
461 nss, cnr_stateid, &restart);
462 inode_unlock(file_inode(dst));
463
464 if (err >= 0)
465 break;
466 if ((err == -ENOTSUPP ||
467 err == -NFS4ERR_OFFLOAD_DENIED) &&
468 nfs42_files_from_same_server(src, dst)) {
469 err = -EOPNOTSUPP;
470 break;
471 } else if (err == -EAGAIN) {
472 if (!restart) {
473 dst_exception.retry = 1;
474 continue;
475 }
476 break;
477 } else if (err == -NFS4ERR_OFFLOAD_NO_REQS &&
478 args.sync != res.synchronous) {
479 args.sync = res.synchronous;
480 dst_exception.retry = 1;
481 continue;
482 } else if ((err == -ESTALE ||
483 err == -NFS4ERR_OFFLOAD_DENIED ||
484 err == -ENOTSUPP) &&
485 !nfs42_files_from_same_server(src, dst)) {
486 nfs42_do_offload_cancel_async(src, &args.src_stateid);
487 err = -EOPNOTSUPP;
488 break;
489 }
490
491 err2 = nfs4_handle_exception(server, err, &src_exception);
492 err = nfs4_handle_exception(server, err, &dst_exception);
493 if (!err)
494 err = err2;
495 } while (src_exception.retry || dst_exception.retry);
496
497 nfs_put_lock_context(dst_lock);
498 out_put_src_lock:
499 nfs_put_lock_context(src_lock);
500 return err;
501 }
502
503 struct nfs42_offloadcancel_data {
504 struct nfs_server *seq_server;
505 struct nfs42_offload_status_args args;
506 struct nfs42_offload_status_res res;
507 };
508
nfs42_offload_cancel_prepare(struct rpc_task * task,void * calldata)509 static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
510 {
511 struct nfs42_offloadcancel_data *data = calldata;
512
513 nfs4_setup_sequence(data->seq_server->nfs_client,
514 &data->args.osa_seq_args,
515 &data->res.osr_seq_res, task);
516 }
517
nfs42_offload_cancel_done(struct rpc_task * task,void * calldata)518 static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
519 {
520 struct nfs42_offloadcancel_data *data = calldata;
521
522 trace_nfs4_offload_cancel(&data->args, task->tk_status);
523 nfs41_sequence_done(task, &data->res.osr_seq_res);
524 if (task->tk_status &&
525 nfs4_async_handle_error(task, data->seq_server, NULL,
526 NULL) == -EAGAIN)
527 rpc_restart_call_prepare(task);
528 }
529
nfs42_free_offloadcancel_data(void * data)530 static void nfs42_free_offloadcancel_data(void *data)
531 {
532 kfree(data);
533 }
534
535 static const struct rpc_call_ops nfs42_offload_cancel_ops = {
536 .rpc_call_prepare = nfs42_offload_cancel_prepare,
537 .rpc_call_done = nfs42_offload_cancel_done,
538 .rpc_release = nfs42_free_offloadcancel_data,
539 };
540
nfs42_do_offload_cancel_async(struct file * dst,nfs4_stateid * stateid)541 static int nfs42_do_offload_cancel_async(struct file *dst,
542 nfs4_stateid *stateid)
543 {
544 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
545 struct nfs42_offloadcancel_data *data = NULL;
546 struct nfs_open_context *ctx = nfs_file_open_context(dst);
547 struct rpc_task *task;
548 struct rpc_message msg = {
549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
550 .rpc_cred = ctx->cred,
551 };
552 struct rpc_task_setup task_setup_data = {
553 .rpc_client = dst_server->client,
554 .rpc_message = &msg,
555 .callback_ops = &nfs42_offload_cancel_ops,
556 .workqueue = nfsiod_workqueue,
557 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE,
558 };
559 int status;
560
561 if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
562 return -EOPNOTSUPP;
563
564 data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_KERNEL);
565 if (data == NULL)
566 return -ENOMEM;
567
568 data->seq_server = dst_server;
569 data->args.osa_src_fh = NFS_FH(file_inode(dst));
570 memcpy(&data->args.osa_stateid, stateid,
571 sizeof(data->args.osa_stateid));
572 msg.rpc_argp = &data->args;
573 msg.rpc_resp = &data->res;
574 task_setup_data.callback_data = data;
575 nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
576 1, 0);
577 task = rpc_run_task(&task_setup_data);
578 if (IS_ERR(task))
579 return PTR_ERR(task);
580 status = rpc_wait_for_completion_task(task);
581 if (status == -ENOTSUPP)
582 dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
583 rpc_put_task(task);
584 return status;
585 }
586
_nfs42_proc_copy_notify(struct file * src,struct file * dst,struct nfs42_copy_notify_args * args,struct nfs42_copy_notify_res * res)587 static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
588 struct nfs42_copy_notify_args *args,
589 struct nfs42_copy_notify_res *res)
590 {
591 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
592 struct rpc_message msg = {
593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
594 .rpc_argp = args,
595 .rpc_resp = res,
596 };
597 int status;
598 struct nfs_open_context *ctx;
599 struct nfs_lock_context *l_ctx;
600
601 ctx = get_nfs_open_context(nfs_file_open_context(src));
602 l_ctx = nfs_get_lock_context(ctx);
603 if (IS_ERR(l_ctx)) {
604 status = PTR_ERR(l_ctx);
605 goto out;
606 }
607
608 status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
609 FMODE_READ);
610 nfs_put_lock_context(l_ctx);
611 if (status) {
612 if (status == -EAGAIN)
613 status = -NFS4ERR_BAD_STATEID;
614 goto out;
615 }
616
617 status = nfs4_call_sync(src_server->client, src_server, &msg,
618 &args->cna_seq_args, &res->cnr_seq_res, 0);
619 trace_nfs4_copy_notify(file_inode(src), args, res, status);
620 if (status == -ENOTSUPP)
621 src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
622
623 out:
624 put_nfs_open_context(nfs_file_open_context(src));
625 return status;
626 }
627
nfs42_proc_copy_notify(struct file * src,struct file * dst,struct nfs42_copy_notify_res * res)628 int nfs42_proc_copy_notify(struct file *src, struct file *dst,
629 struct nfs42_copy_notify_res *res)
630 {
631 struct nfs_server *src_server = NFS_SERVER(file_inode(src));
632 struct nfs42_copy_notify_args *args;
633 struct nfs4_exception exception = {
634 .inode = file_inode(src),
635 };
636 int status;
637
638 if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
639 return -EOPNOTSUPP;
640
641 args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_KERNEL);
642 if (args == NULL)
643 return -ENOMEM;
644
645 args->cna_src_fh = NFS_FH(file_inode(src)),
646 args->cna_dst.nl4_type = NL4_NETADDR;
647 nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
648 exception.stateid = &args->cna_src_stateid;
649
650 do {
651 status = _nfs42_proc_copy_notify(src, dst, args, res);
652 if (status == -ENOTSUPP) {
653 status = -EOPNOTSUPP;
654 goto out;
655 }
656 status = nfs4_handle_exception(src_server, status, &exception);
657 } while (exception.retry);
658
659 out:
660 kfree(args);
661 return status;
662 }
663
_nfs42_proc_llseek(struct file * filep,struct nfs_lock_context * lock,loff_t offset,int whence)664 static loff_t _nfs42_proc_llseek(struct file *filep,
665 struct nfs_lock_context *lock, loff_t offset, int whence)
666 {
667 struct inode *inode = file_inode(filep);
668 struct nfs42_seek_args args = {
669 .sa_fh = NFS_FH(inode),
670 .sa_offset = offset,
671 .sa_what = (whence == SEEK_HOLE) ?
672 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
673 };
674 struct nfs42_seek_res res;
675 struct rpc_message msg = {
676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
677 .rpc_argp = &args,
678 .rpc_resp = &res,
679 };
680 struct nfs_server *server = NFS_SERVER(inode);
681 int status;
682
683 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
684 return -ENOTSUPP;
685
686 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
687 lock, FMODE_READ);
688 if (status) {
689 if (status == -EAGAIN)
690 status = -NFS4ERR_BAD_STATEID;
691 return status;
692 }
693
694 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
695 offset, LLONG_MAX);
696 if (status)
697 return status;
698
699 status = nfs4_call_sync(server->client, server, &msg,
700 &args.seq_args, &res.seq_res, 0);
701 trace_nfs4_llseek(inode, &args, &res, status);
702 if (status == -ENOTSUPP)
703 server->caps &= ~NFS_CAP_SEEK;
704 if (status)
705 return status;
706
707 if (whence == SEEK_DATA && res.sr_eof)
708 return -NFS4ERR_NXIO;
709 else
710 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
711 }
712
nfs42_proc_llseek(struct file * filep,loff_t offset,int whence)713 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
714 {
715 struct nfs_server *server = NFS_SERVER(file_inode(filep));
716 struct nfs4_exception exception = { };
717 struct nfs_lock_context *lock;
718 loff_t err;
719
720 lock = nfs_get_lock_context(nfs_file_open_context(filep));
721 if (IS_ERR(lock))
722 return PTR_ERR(lock);
723
724 exception.inode = file_inode(filep);
725 exception.state = lock->open_context->state;
726
727 do {
728 err = _nfs42_proc_llseek(filep, lock, offset, whence);
729 if (err >= 0)
730 break;
731 if (err == -ENOTSUPP) {
732 err = -EOPNOTSUPP;
733 break;
734 }
735 err = nfs4_handle_exception(server, err, &exception);
736 } while (exception.retry);
737
738 nfs_put_lock_context(lock);
739 return err;
740 }
741
742
743 static void
nfs42_layoutstat_prepare(struct rpc_task * task,void * calldata)744 nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
745 {
746 struct nfs42_layoutstat_data *data = calldata;
747 struct inode *inode = data->inode;
748 struct nfs_server *server = NFS_SERVER(inode);
749 struct pnfs_layout_hdr *lo;
750
751 spin_lock(&inode->i_lock);
752 lo = NFS_I(inode)->layout;
753 if (!pnfs_layout_is_valid(lo)) {
754 spin_unlock(&inode->i_lock);
755 rpc_exit(task, 0);
756 return;
757 }
758 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
759 spin_unlock(&inode->i_lock);
760 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
761 &data->res.seq_res, task);
762 }
763
764 static void
nfs42_layoutstat_done(struct rpc_task * task,void * calldata)765 nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
766 {
767 struct nfs42_layoutstat_data *data = calldata;
768 struct inode *inode = data->inode;
769 struct pnfs_layout_hdr *lo;
770
771 if (!nfs4_sequence_done(task, &data->res.seq_res))
772 return;
773
774 switch (task->tk_status) {
775 case 0:
776 return;
777 case -NFS4ERR_BADHANDLE:
778 case -ESTALE:
779 pnfs_destroy_layout(NFS_I(inode));
780 break;
781 case -NFS4ERR_EXPIRED:
782 case -NFS4ERR_ADMIN_REVOKED:
783 case -NFS4ERR_DELEG_REVOKED:
784 case -NFS4ERR_STALE_STATEID:
785 case -NFS4ERR_BAD_STATEID:
786 spin_lock(&inode->i_lock);
787 lo = NFS_I(inode)->layout;
788 if (pnfs_layout_is_valid(lo) &&
789 nfs4_stateid_match(&data->args.stateid,
790 &lo->plh_stateid)) {
791 LIST_HEAD(head);
792
793 /*
794 * Mark the bad layout state as invalid, then retry
795 * with the current stateid.
796 */
797 pnfs_mark_layout_stateid_invalid(lo, &head);
798 spin_unlock(&inode->i_lock);
799 pnfs_free_lseg_list(&head);
800 nfs_commit_inode(inode, 0);
801 } else
802 spin_unlock(&inode->i_lock);
803 break;
804 case -NFS4ERR_OLD_STATEID:
805 spin_lock(&inode->i_lock);
806 lo = NFS_I(inode)->layout;
807 if (pnfs_layout_is_valid(lo) &&
808 nfs4_stateid_match_other(&data->args.stateid,
809 &lo->plh_stateid)) {
810 /* Do we need to delay before resending? */
811 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
812 &data->args.stateid))
813 rpc_delay(task, HZ);
814 rpc_restart_call_prepare(task);
815 }
816 spin_unlock(&inode->i_lock);
817 break;
818 case -ENOTSUPP:
819 case -EOPNOTSUPP:
820 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
821 }
822
823 trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
824 }
825
826 static void
nfs42_layoutstat_release(void * calldata)827 nfs42_layoutstat_release(void *calldata)
828 {
829 struct nfs42_layoutstat_data *data = calldata;
830 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
831 int i;
832
833 for (i = 0; i < data->args.num_dev; i++) {
834 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
835 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
836 }
837
838 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
839 smp_mb__before_atomic();
840 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
841 smp_mb__after_atomic();
842 nfs_iput_and_deactive(data->inode);
843 kfree(data->args.devinfo);
844 kfree(data);
845 }
846
847 static const struct rpc_call_ops nfs42_layoutstat_ops = {
848 .rpc_call_prepare = nfs42_layoutstat_prepare,
849 .rpc_call_done = nfs42_layoutstat_done,
850 .rpc_release = nfs42_layoutstat_release,
851 };
852
nfs42_proc_layoutstats_generic(struct nfs_server * server,struct nfs42_layoutstat_data * data)853 int nfs42_proc_layoutstats_generic(struct nfs_server *server,
854 struct nfs42_layoutstat_data *data)
855 {
856 struct rpc_message msg = {
857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
858 .rpc_argp = &data->args,
859 .rpc_resp = &data->res,
860 };
861 struct rpc_task_setup task_setup = {
862 .rpc_client = server->client,
863 .rpc_message = &msg,
864 .callback_ops = &nfs42_layoutstat_ops,
865 .callback_data = data,
866 .flags = RPC_TASK_ASYNC,
867 };
868 struct rpc_task *task;
869
870 data->inode = nfs_igrab_and_active(data->args.inode);
871 if (!data->inode) {
872 nfs42_layoutstat_release(data);
873 return -EAGAIN;
874 }
875 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
876 task = rpc_run_task(&task_setup);
877 if (IS_ERR(task))
878 return PTR_ERR(task);
879 rpc_put_task(task);
880 return 0;
881 }
882
883 static struct nfs42_layouterror_data *
nfs42_alloc_layouterror_data(struct pnfs_layout_segment * lseg,gfp_t gfp_flags)884 nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
885 {
886 struct nfs42_layouterror_data *data;
887 struct inode *inode = lseg->pls_layout->plh_inode;
888
889 data = kzalloc(sizeof(*data), gfp_flags);
890 if (data) {
891 data->args.inode = data->inode = nfs_igrab_and_active(inode);
892 if (data->inode) {
893 data->lseg = pnfs_get_lseg(lseg);
894 if (data->lseg)
895 return data;
896 nfs_iput_and_deactive(data->inode);
897 }
898 kfree(data);
899 }
900 return NULL;
901 }
902
903 static void
nfs42_free_layouterror_data(struct nfs42_layouterror_data * data)904 nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
905 {
906 pnfs_put_lseg(data->lseg);
907 nfs_iput_and_deactive(data->inode);
908 kfree(data);
909 }
910
911 static void
nfs42_layouterror_prepare(struct rpc_task * task,void * calldata)912 nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
913 {
914 struct nfs42_layouterror_data *data = calldata;
915 struct inode *inode = data->inode;
916 struct nfs_server *server = NFS_SERVER(inode);
917 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
918 unsigned i;
919
920 spin_lock(&inode->i_lock);
921 if (!pnfs_layout_is_valid(lo)) {
922 spin_unlock(&inode->i_lock);
923 rpc_exit(task, 0);
924 return;
925 }
926 for (i = 0; i < data->args.num_errors; i++)
927 nfs4_stateid_copy(&data->args.errors[i].stateid,
928 &lo->plh_stateid);
929 spin_unlock(&inode->i_lock);
930 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
931 &data->res.seq_res, task);
932 }
933
934 static void
nfs42_layouterror_done(struct rpc_task * task,void * calldata)935 nfs42_layouterror_done(struct rpc_task *task, void *calldata)
936 {
937 struct nfs42_layouterror_data *data = calldata;
938 struct inode *inode = data->inode;
939 struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
940
941 if (!nfs4_sequence_done(task, &data->res.seq_res))
942 return;
943
944 switch (task->tk_status) {
945 case 0:
946 return;
947 case -NFS4ERR_BADHANDLE:
948 case -ESTALE:
949 pnfs_destroy_layout(NFS_I(inode));
950 break;
951 case -NFS4ERR_EXPIRED:
952 case -NFS4ERR_ADMIN_REVOKED:
953 case -NFS4ERR_DELEG_REVOKED:
954 case -NFS4ERR_STALE_STATEID:
955 case -NFS4ERR_BAD_STATEID:
956 spin_lock(&inode->i_lock);
957 if (pnfs_layout_is_valid(lo) &&
958 nfs4_stateid_match(&data->args.errors[0].stateid,
959 &lo->plh_stateid)) {
960 LIST_HEAD(head);
961
962 /*
963 * Mark the bad layout state as invalid, then retry
964 * with the current stateid.
965 */
966 pnfs_mark_layout_stateid_invalid(lo, &head);
967 spin_unlock(&inode->i_lock);
968 pnfs_free_lseg_list(&head);
969 nfs_commit_inode(inode, 0);
970 } else
971 spin_unlock(&inode->i_lock);
972 break;
973 case -NFS4ERR_OLD_STATEID:
974 spin_lock(&inode->i_lock);
975 if (pnfs_layout_is_valid(lo) &&
976 nfs4_stateid_match_other(&data->args.errors[0].stateid,
977 &lo->plh_stateid)) {
978 /* Do we need to delay before resending? */
979 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
980 &data->args.errors[0].stateid))
981 rpc_delay(task, HZ);
982 rpc_restart_call_prepare(task);
983 }
984 spin_unlock(&inode->i_lock);
985 break;
986 case -ENOTSUPP:
987 case -EOPNOTSUPP:
988 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
989 }
990
991 trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
992 task->tk_status);
993 }
994
995 static void
nfs42_layouterror_release(void * calldata)996 nfs42_layouterror_release(void *calldata)
997 {
998 struct nfs42_layouterror_data *data = calldata;
999
1000 nfs42_free_layouterror_data(data);
1001 }
1002
1003 static const struct rpc_call_ops nfs42_layouterror_ops = {
1004 .rpc_call_prepare = nfs42_layouterror_prepare,
1005 .rpc_call_done = nfs42_layouterror_done,
1006 .rpc_release = nfs42_layouterror_release,
1007 };
1008
nfs42_proc_layouterror(struct pnfs_layout_segment * lseg,const struct nfs42_layout_error * errors,size_t n)1009 int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
1010 const struct nfs42_layout_error *errors, size_t n)
1011 {
1012 struct inode *inode = lseg->pls_layout->plh_inode;
1013 struct nfs42_layouterror_data *data;
1014 struct rpc_task *task;
1015 struct rpc_message msg = {
1016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
1017 };
1018 struct rpc_task_setup task_setup = {
1019 .rpc_message = &msg,
1020 .callback_ops = &nfs42_layouterror_ops,
1021 .flags = RPC_TASK_ASYNC,
1022 };
1023 unsigned int i;
1024
1025 if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
1026 return -EOPNOTSUPP;
1027 if (n > NFS42_LAYOUTERROR_MAX)
1028 return -EINVAL;
1029 data = nfs42_alloc_layouterror_data(lseg, nfs_io_gfp_mask());
1030 if (!data)
1031 return -ENOMEM;
1032 for (i = 0; i < n; i++) {
1033 data->args.errors[i] = errors[i];
1034 data->args.num_errors++;
1035 data->res.num_errors++;
1036 }
1037 msg.rpc_argp = &data->args;
1038 msg.rpc_resp = &data->res;
1039 task_setup.callback_data = data;
1040 task_setup.rpc_client = NFS_SERVER(inode)->client;
1041 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
1042 task = rpc_run_task(&task_setup);
1043 if (IS_ERR(task))
1044 return PTR_ERR(task);
1045 rpc_put_task(task);
1046 return 0;
1047 }
1048 EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
1049
_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)1050 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
1051 struct file *dst_f, struct nfs_lock_context *src_lock,
1052 struct nfs_lock_context *dst_lock, loff_t src_offset,
1053 loff_t dst_offset, loff_t count)
1054 {
1055 struct inode *src_inode = file_inode(src_f);
1056 struct inode *dst_inode = file_inode(dst_f);
1057 struct nfs_server *server = NFS_SERVER(dst_inode);
1058 __u32 dst_bitmask[NFS_BITMASK_SZ];
1059 struct nfs42_clone_args args = {
1060 .src_fh = NFS_FH(src_inode),
1061 .dst_fh = NFS_FH(dst_inode),
1062 .src_offset = src_offset,
1063 .dst_offset = dst_offset,
1064 .count = count,
1065 .dst_bitmask = dst_bitmask,
1066 };
1067 struct nfs42_clone_res res = {
1068 .server = server,
1069 };
1070 int status;
1071
1072 msg->rpc_argp = &args;
1073 msg->rpc_resp = &res;
1074
1075 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
1076 src_lock, FMODE_READ);
1077 if (status) {
1078 if (status == -EAGAIN)
1079 status = -NFS4ERR_BAD_STATEID;
1080 return status;
1081 }
1082 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
1083 dst_lock, FMODE_WRITE);
1084 if (status) {
1085 if (status == -EAGAIN)
1086 status = -NFS4ERR_BAD_STATEID;
1087 return status;
1088 }
1089
1090 res.dst_fattr = nfs_alloc_fattr();
1091 if (!res.dst_fattr)
1092 return -ENOMEM;
1093
1094 nfs4_bitmask_set(dst_bitmask, server->cache_consistency_bitmask,
1095 dst_inode, NFS_INO_INVALID_BLOCKS);
1096
1097 status = nfs4_call_sync(server->client, server, msg,
1098 &args.seq_args, &res.seq_res, 0);
1099 trace_nfs4_clone(src_inode, dst_inode, &args, status);
1100 if (status == 0) {
1101 /* a zero-length count means clone to EOF in src */
1102 if (count == 0 && res.dst_fattr->valid & NFS_ATTR_FATTR_SIZE)
1103 count = nfs_size_to_loff_t(res.dst_fattr->size) - dst_offset;
1104 nfs42_copy_dest_done(dst_inode, dst_offset, count);
1105 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
1106 }
1107
1108 kfree(res.dst_fattr);
1109 return status;
1110 }
1111
nfs42_proc_clone(struct file * src_f,struct file * dst_f,loff_t src_offset,loff_t dst_offset,loff_t count)1112 int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
1113 loff_t src_offset, loff_t dst_offset, loff_t count)
1114 {
1115 struct rpc_message msg = {
1116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
1117 };
1118 struct inode *inode = file_inode(src_f);
1119 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
1120 struct nfs_lock_context *src_lock;
1121 struct nfs_lock_context *dst_lock;
1122 struct nfs4_exception src_exception = { };
1123 struct nfs4_exception dst_exception = { };
1124 int err, err2;
1125
1126 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
1127 return -EOPNOTSUPP;
1128
1129 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
1130 if (IS_ERR(src_lock))
1131 return PTR_ERR(src_lock);
1132
1133 src_exception.inode = file_inode(src_f);
1134 src_exception.state = src_lock->open_context->state;
1135
1136 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
1137 if (IS_ERR(dst_lock)) {
1138 err = PTR_ERR(dst_lock);
1139 goto out_put_src_lock;
1140 }
1141
1142 dst_exception.inode = file_inode(dst_f);
1143 dst_exception.state = dst_lock->open_context->state;
1144
1145 do {
1146 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
1147 src_offset, dst_offset, count);
1148 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
1149 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
1150 err = -EOPNOTSUPP;
1151 break;
1152 }
1153
1154 err2 = nfs4_handle_exception(server, err, &src_exception);
1155 err = nfs4_handle_exception(server, err, &dst_exception);
1156 if (!err)
1157 err = err2;
1158 } while (src_exception.retry || dst_exception.retry);
1159
1160 nfs_put_lock_context(dst_lock);
1161 out_put_src_lock:
1162 nfs_put_lock_context(src_lock);
1163 return err;
1164 }
1165
1166 #define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
1167
_nfs42_proc_removexattr(struct inode * inode,const char * name)1168 static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
1169 {
1170 struct nfs_server *server = NFS_SERVER(inode);
1171 struct nfs42_removexattrargs args = {
1172 .fh = NFS_FH(inode),
1173 .xattr_name = name,
1174 };
1175 struct nfs42_removexattrres res;
1176 struct rpc_message msg = {
1177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
1178 .rpc_argp = &args,
1179 .rpc_resp = &res,
1180 };
1181 int ret;
1182 unsigned long timestamp = jiffies;
1183
1184 ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
1185 &res.seq_res, 1);
1186 trace_nfs4_removexattr(inode, name, ret);
1187 if (!ret)
1188 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1189
1190 return ret;
1191 }
1192
_nfs42_proc_setxattr(struct inode * inode,const char * name,const void * buf,size_t buflen,int flags)1193 static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
1194 const void *buf, size_t buflen, int flags)
1195 {
1196 struct nfs_server *server = NFS_SERVER(inode);
1197 __u32 bitmask[NFS_BITMASK_SZ];
1198 struct page *pages[NFS4XATTR_MAXPAGES];
1199 struct nfs42_setxattrargs arg = {
1200 .fh = NFS_FH(inode),
1201 .bitmask = bitmask,
1202 .xattr_pages = pages,
1203 .xattr_len = buflen,
1204 .xattr_name = name,
1205 .xattr_flags = flags,
1206 };
1207 struct nfs42_setxattrres res = {
1208 .server = server,
1209 };
1210 struct rpc_message msg = {
1211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
1212 .rpc_argp = &arg,
1213 .rpc_resp = &res,
1214 };
1215 int ret, np;
1216 unsigned long timestamp = jiffies;
1217
1218 if (buflen > server->sxasize)
1219 return -ERANGE;
1220
1221 res.fattr = nfs_alloc_fattr();
1222 if (!res.fattr)
1223 return -ENOMEM;
1224
1225 if (buflen > 0) {
1226 np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
1227 if (np < 0) {
1228 ret = np;
1229 goto out;
1230 }
1231 } else
1232 np = 0;
1233
1234 nfs4_bitmask_set(bitmask, server->cache_consistency_bitmask,
1235 inode, NFS_INO_INVALID_CHANGE);
1236
1237 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1238 &res.seq_res, 1);
1239 trace_nfs4_setxattr(inode, name, ret);
1240
1241 for (; np > 0; np--)
1242 put_page(pages[np - 1]);
1243
1244 if (!ret) {
1245 nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
1246 ret = nfs_post_op_update_inode(inode, res.fattr);
1247 }
1248
1249 out:
1250 kfree(res.fattr);
1251 return ret;
1252 }
1253
_nfs42_proc_getxattr(struct inode * inode,const char * name,void * buf,size_t buflen,struct page ** pages,size_t plen)1254 static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
1255 void *buf, size_t buflen, struct page **pages,
1256 size_t plen)
1257 {
1258 struct nfs_server *server = NFS_SERVER(inode);
1259 struct nfs42_getxattrargs arg = {
1260 .fh = NFS_FH(inode),
1261 .xattr_name = name,
1262 };
1263 struct nfs42_getxattrres res;
1264 struct rpc_message msg = {
1265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
1266 .rpc_argp = &arg,
1267 .rpc_resp = &res,
1268 };
1269 ssize_t ret;
1270
1271 arg.xattr_len = plen;
1272 arg.xattr_pages = pages;
1273
1274 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1275 &res.seq_res, 0);
1276 trace_nfs4_getxattr(inode, name, ret);
1277 if (ret < 0)
1278 return ret;
1279
1280 /*
1281 * Normally, the caching is done one layer up, but for successful
1282 * RPCS, always cache the result here, even if the caller was
1283 * just querying the length, or if the reply was too big for
1284 * the caller. This avoids a second RPC in the case of the
1285 * common query-alloc-retrieve cycle for xattrs.
1286 *
1287 * Note that xattr_len is always capped to XATTR_SIZE_MAX.
1288 */
1289
1290 nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
1291
1292 if (buflen) {
1293 if (res.xattr_len > buflen)
1294 return -ERANGE;
1295 _copy_from_pages(buf, pages, 0, res.xattr_len);
1296 }
1297
1298 return res.xattr_len;
1299 }
1300
_nfs42_proc_listxattrs(struct inode * inode,void * buf,size_t buflen,u64 * cookiep,bool * eofp)1301 static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
1302 size_t buflen, u64 *cookiep, bool *eofp)
1303 {
1304 struct nfs_server *server = NFS_SERVER(inode);
1305 struct page **pages;
1306 struct nfs42_listxattrsargs arg = {
1307 .fh = NFS_FH(inode),
1308 .cookie = *cookiep,
1309 };
1310 struct nfs42_listxattrsres res = {
1311 .eof = false,
1312 .xattr_buf = buf,
1313 .xattr_len = buflen,
1314 };
1315 struct rpc_message msg = {
1316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
1317 .rpc_argp = &arg,
1318 .rpc_resp = &res,
1319 };
1320 u32 xdrlen;
1321 int ret, np, i;
1322
1323
1324 ret = -ENOMEM;
1325 res.scratch = alloc_page(GFP_KERNEL);
1326 if (!res.scratch)
1327 goto out;
1328
1329 xdrlen = nfs42_listxattr_xdrsize(buflen);
1330 if (xdrlen > server->lxasize)
1331 xdrlen = server->lxasize;
1332 np = xdrlen / PAGE_SIZE + 1;
1333
1334 pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
1335 if (!pages)
1336 goto out_free_scratch;
1337 for (i = 0; i < np; i++) {
1338 pages[i] = alloc_page(GFP_KERNEL);
1339 if (!pages[i])
1340 goto out_free_pages;
1341 }
1342
1343 arg.xattr_pages = pages;
1344 arg.count = xdrlen;
1345
1346 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
1347 &res.seq_res, 0);
1348 trace_nfs4_listxattr(inode, ret);
1349
1350 if (ret >= 0) {
1351 ret = res.copied;
1352 *cookiep = res.cookie;
1353 *eofp = res.eof;
1354 }
1355
1356 out_free_pages:
1357 while (--np >= 0) {
1358 if (pages[np])
1359 __free_page(pages[np]);
1360 }
1361 kfree(pages);
1362 out_free_scratch:
1363 __free_page(res.scratch);
1364 out:
1365 return ret;
1366
1367 }
1368
nfs42_proc_getxattr(struct inode * inode,const char * name,void * buf,size_t buflen)1369 ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
1370 void *buf, size_t buflen)
1371 {
1372 struct nfs4_exception exception = { };
1373 ssize_t err, np, i;
1374 struct page **pages;
1375
1376 np = nfs_page_array_len(0, buflen ?: XATTR_SIZE_MAX);
1377 pages = kmalloc_array(np, sizeof(*pages), GFP_KERNEL);
1378 if (!pages)
1379 return -ENOMEM;
1380
1381 for (i = 0; i < np; i++) {
1382 pages[i] = alloc_page(GFP_KERNEL);
1383 if (!pages[i]) {
1384 err = -ENOMEM;
1385 goto out;
1386 }
1387 }
1388
1389 /*
1390 * The GETXATTR op has no length field in the call, and the
1391 * xattr data is at the end of the reply.
1392 *
1393 * There is no downside in using the page-aligned length. It will
1394 * allow receiving and caching xattrs that are too large for the
1395 * caller but still fit in the page-rounded value.
1396 */
1397 do {
1398 err = _nfs42_proc_getxattr(inode, name, buf, buflen,
1399 pages, np * PAGE_SIZE);
1400 if (err >= 0)
1401 break;
1402 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1403 &exception);
1404 } while (exception.retry);
1405
1406 out:
1407 while (--i >= 0)
1408 __free_page(pages[i]);
1409 kfree(pages);
1410
1411 return err;
1412 }
1413
nfs42_proc_setxattr(struct inode * inode,const char * name,const void * buf,size_t buflen,int flags)1414 int nfs42_proc_setxattr(struct inode *inode, const char *name,
1415 const void *buf, size_t buflen, int flags)
1416 {
1417 struct nfs4_exception exception = { };
1418 int err;
1419
1420 do {
1421 err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
1422 if (!err)
1423 break;
1424 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1425 &exception);
1426 } while (exception.retry);
1427
1428 return err;
1429 }
1430
nfs42_proc_listxattrs(struct inode * inode,void * buf,size_t buflen,u64 * cookiep,bool * eofp)1431 ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
1432 size_t buflen, u64 *cookiep, bool *eofp)
1433 {
1434 struct nfs4_exception exception = { };
1435 ssize_t err;
1436
1437 do {
1438 err = _nfs42_proc_listxattrs(inode, buf, buflen,
1439 cookiep, eofp);
1440 if (err >= 0)
1441 break;
1442 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1443 &exception);
1444 } while (exception.retry);
1445
1446 return err;
1447 }
1448
nfs42_proc_removexattr(struct inode * inode,const char * name)1449 int nfs42_proc_removexattr(struct inode *inode, const char *name)
1450 {
1451 struct nfs4_exception exception = { };
1452 int err;
1453
1454 do {
1455 err = _nfs42_proc_removexattr(inode, name);
1456 if (!err)
1457 break;
1458 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1459 &exception);
1460 } while (exception.retry);
1461
1462 return err;
1463 }
1464