1
2
3
4
5#include <linux/fs.h>
6#include <linux/sunrpc/sched.h>
7#include <linux/nfs.h>
8#include <linux/nfs3.h>
9#include <linux/nfs4.h>
10#include <linux/nfs_xdr.h>
11#include <linux/nfs_fs.h>
12#include "nfs4_fs.h"
13#include "nfs42.h"
14#include "iostat.h"
15#include "pnfs.h"
16#include "nfs4session.h"
17#include "internal.h"
18
19#define NFSDBG_FACILITY NFSDBG_PROC
20
21static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
22 struct nfs_lock_context *lock, loff_t offset, loff_t len)
23{
24 struct inode *inode = file_inode(filep);
25 struct nfs_server *server = NFS_SERVER(inode);
26 struct nfs42_falloc_args args = {
27 .falloc_fh = NFS_FH(inode),
28 .falloc_offset = offset,
29 .falloc_length = len,
30 .falloc_bitmask = server->cache_consistency_bitmask,
31 };
32 struct nfs42_falloc_res res = {
33 .falloc_server = server,
34 };
35 int status;
36
37 msg->rpc_argp = &args;
38 msg->rpc_resp = &res;
39
40 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
41 lock, FMODE_WRITE);
42 if (status)
43 return status;
44
45 res.falloc_fattr = nfs_alloc_fattr();
46 if (!res.falloc_fattr)
47 return -ENOMEM;
48
49 status = nfs4_call_sync(server->client, server, msg,
50 &args.seq_args, &res.seq_res, 0);
51 if (status == 0)
52 status = nfs_post_op_update_inode(inode, res.falloc_fattr);
53
54 kfree(res.falloc_fattr);
55 return status;
56}
57
58static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
59 loff_t offset, loff_t len)
60{
61 struct nfs_server *server = NFS_SERVER(file_inode(filep));
62 struct nfs4_exception exception = { };
63 struct nfs_lock_context *lock;
64 int err;
65
66 lock = nfs_get_lock_context(nfs_file_open_context(filep));
67 if (IS_ERR(lock))
68 return PTR_ERR(lock);
69
70 exception.inode = file_inode(filep);
71 exception.state = lock->open_context->state;
72
73 do {
74 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
75 if (err == -ENOTSUPP) {
76 err = -EOPNOTSUPP;
77 break;
78 }
79 err = nfs4_handle_exception(server, err, &exception);
80 } while (exception.retry);
81
82 nfs_put_lock_context(lock);
83 return err;
84}
85
86int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
87{
88 struct rpc_message msg = {
89 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
90 };
91 struct inode *inode = file_inode(filep);
92 int err;
93
94 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
95 return -EOPNOTSUPP;
96
97 inode_lock(inode);
98
99 err = nfs42_proc_fallocate(&msg, filep, offset, len);
100 if (err == -EOPNOTSUPP)
101 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
102
103 inode_unlock(inode);
104 return err;
105}
106
107int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
108{
109 struct rpc_message msg = {
110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
111 };
112 struct inode *inode = file_inode(filep);
113 int err;
114
115 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
116 return -EOPNOTSUPP;
117
118 inode_lock(inode);
119 err = nfs_sync_inode(inode);
120 if (err)
121 goto out_unlock;
122
123 err = nfs42_proc_fallocate(&msg, filep, offset, len);
124 if (err == 0)
125 truncate_pagecache_range(inode, offset, (offset + len) -1);
126 if (err == -EOPNOTSUPP)
127 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
128out_unlock:
129 inode_unlock(inode);
130 return err;
131}
132
133static ssize_t _nfs42_proc_copy(struct file *src,
134 struct nfs_lock_context *src_lock,
135 struct file *dst,
136 struct nfs_lock_context *dst_lock,
137 struct nfs42_copy_args *args,
138 struct nfs42_copy_res *res)
139{
140 struct rpc_message msg = {
141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
142 .rpc_argp = args,
143 .rpc_resp = res,
144 };
145 struct inode *dst_inode = file_inode(dst);
146 struct nfs_server *server = NFS_SERVER(dst_inode);
147 loff_t pos_src = args->src_pos;
148 loff_t pos_dst = args->dst_pos;
149 size_t count = args->count;
150 ssize_t status;
151
152 status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context,
153 src_lock, FMODE_READ);
154 if (status)
155 return status;
156
157 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
158 pos_src, pos_src + (loff_t)count - 1);
159 if (status)
160 return status;
161
162 status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
163 dst_lock, FMODE_WRITE);
164 if (status)
165 return status;
166
167 status = nfs_sync_inode(dst_inode);
168 if (status)
169 return status;
170
171 res->commit_res.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
172 if (!res->commit_res.verf)
173 return -ENOMEM;
174 status = nfs4_call_sync(server->client, server, &msg,
175 &args->seq_args, &res->seq_res, 0);
176 if (status == -ENOTSUPP)
177 server->caps &= ~NFS_CAP_COPY;
178 if (status)
179 goto out;
180
181 if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
182 &res->commit_res.verf->verifier)) {
183 status = -EAGAIN;
184 goto out;
185 }
186
187 truncate_pagecache_range(dst_inode, pos_dst,
188 pos_dst + res->write_res.count);
189
190 status = res->write_res.count;
191out:
192 kfree(res->commit_res.verf);
193 return status;
194}
195
196ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
197 struct file *dst, loff_t pos_dst,
198 size_t count)
199{
200 struct nfs_server *server = NFS_SERVER(file_inode(dst));
201 struct nfs_lock_context *src_lock;
202 struct nfs_lock_context *dst_lock;
203 struct nfs42_copy_args args = {
204 .src_fh = NFS_FH(file_inode(src)),
205 .src_pos = pos_src,
206 .dst_fh = NFS_FH(file_inode(dst)),
207 .dst_pos = pos_dst,
208 .count = count,
209 };
210 struct nfs42_copy_res res;
211 struct nfs4_exception src_exception = {
212 .inode = file_inode(src),
213 .stateid = &args.src_stateid,
214 };
215 struct nfs4_exception dst_exception = {
216 .inode = file_inode(dst),
217 .stateid = &args.dst_stateid,
218 };
219 ssize_t err, err2;
220
221 if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
222 return -EOPNOTSUPP;
223
224 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
225 if (IS_ERR(src_lock))
226 return PTR_ERR(src_lock);
227
228 src_exception.state = src_lock->open_context->state;
229
230 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
231 if (IS_ERR(dst_lock)) {
232 err = PTR_ERR(dst_lock);
233 goto out_put_src_lock;
234 }
235
236 dst_exception.state = dst_lock->open_context->state;
237
238 do {
239 inode_lock(file_inode(dst));
240 err = _nfs42_proc_copy(src, src_lock,
241 dst, dst_lock,
242 &args, &res);
243 inode_unlock(file_inode(dst));
244
245 if (err >= 0)
246 break;
247 if (err == -ENOTSUPP) {
248 err = -EOPNOTSUPP;
249 break;
250 } if (err == -EAGAIN) {
251 dst_exception.retry = 1;
252 continue;
253 }
254
255 err2 = nfs4_handle_exception(server, err, &src_exception);
256 err = nfs4_handle_exception(server, err, &dst_exception);
257 if (!err)
258 err = err2;
259 } while (src_exception.retry || dst_exception.retry);
260
261 nfs_put_lock_context(dst_lock);
262out_put_src_lock:
263 nfs_put_lock_context(src_lock);
264 return err;
265}
266
267static loff_t _nfs42_proc_llseek(struct file *filep,
268 struct nfs_lock_context *lock, loff_t offset, int whence)
269{
270 struct inode *inode = file_inode(filep);
271 struct nfs42_seek_args args = {
272 .sa_fh = NFS_FH(inode),
273 .sa_offset = offset,
274 .sa_what = (whence == SEEK_HOLE) ?
275 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
276 };
277 struct nfs42_seek_res res;
278 struct rpc_message msg = {
279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
280 .rpc_argp = &args,
281 .rpc_resp = &res,
282 };
283 struct nfs_server *server = NFS_SERVER(inode);
284 int status;
285
286 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
287 return -ENOTSUPP;
288
289 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
290 lock, FMODE_READ);
291 if (status)
292 return status;
293
294 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
295 offset, LLONG_MAX);
296 if (status)
297 return status;
298
299 status = nfs4_call_sync(server->client, server, &msg,
300 &args.seq_args, &res.seq_res, 0);
301 if (status == -ENOTSUPP)
302 server->caps &= ~NFS_CAP_SEEK;
303 if (status)
304 return status;
305
306 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
307}
308
309loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
310{
311 struct nfs_server *server = NFS_SERVER(file_inode(filep));
312 struct nfs4_exception exception = { };
313 struct nfs_lock_context *lock;
314 loff_t err;
315
316 lock = nfs_get_lock_context(nfs_file_open_context(filep));
317 if (IS_ERR(lock))
318 return PTR_ERR(lock);
319
320 exception.inode = file_inode(filep);
321 exception.state = lock->open_context->state;
322
323 do {
324 err = _nfs42_proc_llseek(filep, lock, offset, whence);
325 if (err >= 0)
326 break;
327 if (err == -ENOTSUPP) {
328 err = -EOPNOTSUPP;
329 break;
330 }
331 err = nfs4_handle_exception(server, err, &exception);
332 } while (exception.retry);
333
334 nfs_put_lock_context(lock);
335 return err;
336}
337
338
339static void
340nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
341{
342 struct nfs42_layoutstat_data *data = calldata;
343 struct inode *inode = data->inode;
344 struct nfs_server *server = NFS_SERVER(inode);
345 struct pnfs_layout_hdr *lo;
346
347 spin_lock(&inode->i_lock);
348 lo = NFS_I(inode)->layout;
349 if (!pnfs_layout_is_valid(lo)) {
350 spin_unlock(&inode->i_lock);
351 rpc_exit(task, 0);
352 return;
353 }
354 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
355 spin_unlock(&inode->i_lock);
356 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
357 &data->res.seq_res, task);
358}
359
360static void
361nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
362{
363 struct nfs42_layoutstat_data *data = calldata;
364 struct inode *inode = data->inode;
365 struct pnfs_layout_hdr *lo;
366
367 if (!nfs4_sequence_done(task, &data->res.seq_res))
368 return;
369
370 switch (task->tk_status) {
371 case 0:
372 break;
373 case -NFS4ERR_EXPIRED:
374 case -NFS4ERR_ADMIN_REVOKED:
375 case -NFS4ERR_DELEG_REVOKED:
376 case -NFS4ERR_STALE_STATEID:
377 case -NFS4ERR_BAD_STATEID:
378 spin_lock(&inode->i_lock);
379 lo = NFS_I(inode)->layout;
380 if (pnfs_layout_is_valid(lo) &&
381 nfs4_stateid_match(&data->args.stateid,
382 &lo->plh_stateid)) {
383 LIST_HEAD(head);
384
385
386
387
388
389 pnfs_mark_layout_stateid_invalid(lo, &head);
390 spin_unlock(&inode->i_lock);
391 pnfs_free_lseg_list(&head);
392 nfs_commit_inode(inode, 0);
393 } else
394 spin_unlock(&inode->i_lock);
395 break;
396 case -NFS4ERR_OLD_STATEID:
397 spin_lock(&inode->i_lock);
398 lo = NFS_I(inode)->layout;
399 if (pnfs_layout_is_valid(lo) &&
400 nfs4_stateid_match_other(&data->args.stateid,
401 &lo->plh_stateid)) {
402
403 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
404 &data->args.stateid))
405 rpc_delay(task, HZ);
406 rpc_restart_call_prepare(task);
407 }
408 spin_unlock(&inode->i_lock);
409 break;
410 case -ENOTSUPP:
411 case -EOPNOTSUPP:
412 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
413 }
414}
415
416static void
417nfs42_layoutstat_release(void *calldata)
418{
419 struct nfs42_layoutstat_data *data = calldata;
420 struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
421 int i;
422
423 for (i = 0; i < data->args.num_dev; i++) {
424 if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
425 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
426 }
427
428 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
429 smp_mb__before_atomic();
430 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
431 smp_mb__after_atomic();
432 nfs_iput_and_deactive(data->inode);
433 kfree(data->args.devinfo);
434 kfree(data);
435}
436
437static const struct rpc_call_ops nfs42_layoutstat_ops = {
438 .rpc_call_prepare = nfs42_layoutstat_prepare,
439 .rpc_call_done = nfs42_layoutstat_done,
440 .rpc_release = nfs42_layoutstat_release,
441};
442
443int nfs42_proc_layoutstats_generic(struct nfs_server *server,
444 struct nfs42_layoutstat_data *data)
445{
446 struct rpc_message msg = {
447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
448 .rpc_argp = &data->args,
449 .rpc_resp = &data->res,
450 };
451 struct rpc_task_setup task_setup = {
452 .rpc_client = server->client,
453 .rpc_message = &msg,
454 .callback_ops = &nfs42_layoutstat_ops,
455 .callback_data = data,
456 .flags = RPC_TASK_ASYNC,
457 };
458 struct rpc_task *task;
459
460 data->inode = nfs_igrab_and_active(data->args.inode);
461 if (!data->inode) {
462 nfs42_layoutstat_release(data);
463 return -EAGAIN;
464 }
465 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
466 task = rpc_run_task(&task_setup);
467 if (IS_ERR(task))
468 return PTR_ERR(task);
469 rpc_put_task(task);
470 return 0;
471}
472
473static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
474 struct file *dst_f, struct nfs_lock_context *src_lock,
475 struct nfs_lock_context *dst_lock, loff_t src_offset,
476 loff_t dst_offset, loff_t count)
477{
478 struct inode *src_inode = file_inode(src_f);
479 struct inode *dst_inode = file_inode(dst_f);
480 struct nfs_server *server = NFS_SERVER(dst_inode);
481 struct nfs42_clone_args args = {
482 .src_fh = NFS_FH(src_inode),
483 .dst_fh = NFS_FH(dst_inode),
484 .src_offset = src_offset,
485 .dst_offset = dst_offset,
486 .count = count,
487 .dst_bitmask = server->cache_consistency_bitmask,
488 };
489 struct nfs42_clone_res res = {
490 .server = server,
491 };
492 int status;
493
494 msg->rpc_argp = &args;
495 msg->rpc_resp = &res;
496
497 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
498 src_lock, FMODE_READ);
499 if (status)
500 return status;
501
502 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
503 dst_lock, FMODE_WRITE);
504 if (status)
505 return status;
506
507 res.dst_fattr = nfs_alloc_fattr();
508 if (!res.dst_fattr)
509 return -ENOMEM;
510
511 status = nfs4_call_sync(server->client, server, msg,
512 &args.seq_args, &res.seq_res, 0);
513 if (status == 0)
514 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
515
516 kfree(res.dst_fattr);
517 return status;
518}
519
520int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
521 loff_t src_offset, loff_t dst_offset, loff_t count)
522{
523 struct rpc_message msg = {
524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
525 };
526 struct inode *inode = file_inode(src_f);
527 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
528 struct nfs_lock_context *src_lock;
529 struct nfs_lock_context *dst_lock;
530 struct nfs4_exception src_exception = { };
531 struct nfs4_exception dst_exception = { };
532 int err, err2;
533
534 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
535 return -EOPNOTSUPP;
536
537 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
538 if (IS_ERR(src_lock))
539 return PTR_ERR(src_lock);
540
541 src_exception.inode = file_inode(src_f);
542 src_exception.state = src_lock->open_context->state;
543
544 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
545 if (IS_ERR(dst_lock)) {
546 err = PTR_ERR(dst_lock);
547 goto out_put_src_lock;
548 }
549
550 dst_exception.inode = file_inode(dst_f);
551 dst_exception.state = dst_lock->open_context->state;
552
553 do {
554 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
555 src_offset, dst_offset, count);
556 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
557 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
558 err = -EOPNOTSUPP;
559 break;
560 }
561
562 err2 = nfs4_handle_exception(server, err, &src_exception);
563 err = nfs4_handle_exception(server, err, &dst_exception);
564 if (!err)
565 err = err2;
566 } while (src_exception.retry || dst_exception.retry);
567
568 nfs_put_lock_context(dst_lock);
569out_put_src_lock:
570 nfs_put_lock_context(src_lock);
571 return err;
572}
573
