1
2
3
4#include <linux/fs.h>
5#include <linux/sunrpc/sched.h>
6#include <linux/nfs.h>
7#include <linux/nfs3.h>
8#include <linux/nfs4.h>
9#include <linux/nfs_xdr.h>
10#include <linux/nfs_fs.h>
11#include "nfs4_fs.h"
12#include "nfs42.h"
13#include "iostat.h"
14#include "pnfs.h"
15#include "internal.h"
16
17#define NFSDBG_FACILITY NFSDBG_PROC
18
19static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
20 struct nfs_lock_context *lock, loff_t offset, loff_t len)
21{
22 struct inode *inode = file_inode(filep);
23 struct nfs_server *server = NFS_SERVER(inode);
24 struct nfs42_falloc_args args = {
25 .falloc_fh = NFS_FH(inode),
26 .falloc_offset = offset,
27 .falloc_length = len,
28 .falloc_bitmask = server->cache_consistency_bitmask,
29 };
30 struct nfs42_falloc_res res = {
31 .falloc_server = server,
32 };
33 int status;
34
35 msg->rpc_argp = &args;
36 msg->rpc_resp = &res;
37
38 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
39 lock, FMODE_WRITE);
40 if (status)
41 return status;
42
43 res.falloc_fattr = nfs_alloc_fattr();
44 if (!res.falloc_fattr)
45 return -ENOMEM;
46
47 status = nfs4_call_sync(server->client, server, msg,
48 &args.seq_args, &res.seq_res, 0);
49 if (status == 0)
50 status = nfs_post_op_update_inode(inode, res.falloc_fattr);
51
52 kfree(res.falloc_fattr);
53 return status;
54}
55
56static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
57 loff_t offset, loff_t len)
58{
59 struct nfs_server *server = NFS_SERVER(file_inode(filep));
60 struct nfs4_exception exception = { };
61 struct nfs_lock_context *lock;
62 int err;
63
64 lock = nfs_get_lock_context(nfs_file_open_context(filep));
65 if (IS_ERR(lock))
66 return PTR_ERR(lock);
67
68 exception.inode = file_inode(filep);
69 exception.state = lock->open_context->state;
70
71 do {
72 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
73 if (err == -ENOTSUPP) {
74 err = -EOPNOTSUPP;
75 break;
76 }
77 err = nfs4_handle_exception(server, err, &exception);
78 } while (exception.retry);
79
80 nfs_put_lock_context(lock);
81 return err;
82}
83
84int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
85{
86 struct rpc_message msg = {
87 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
88 };
89 struct inode *inode = file_inode(filep);
90 int err;
91
92 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
93 return -EOPNOTSUPP;
94
95 inode_lock(inode);
96
97 err = nfs42_proc_fallocate(&msg, filep, offset, len);
98 if (err == -EOPNOTSUPP)
99 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
100
101 inode_unlock(inode);
102 return err;
103}
104
105int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
106{
107 struct rpc_message msg = {
108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
109 };
110 struct inode *inode = file_inode(filep);
111 int err;
112
113 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
114 return -EOPNOTSUPP;
115
116 inode_lock(inode);
117 err = nfs_sync_inode(inode);
118 if (err)
119 goto out_unlock;
120
121 err = nfs42_proc_fallocate(&msg, filep, offset, len);
122 if (err == 0)
123 truncate_pagecache_range(inode, offset, (offset + len) -1);
124 if (err == -EOPNOTSUPP)
125 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
126out_unlock:
127 inode_unlock(inode);
128 return err;
129}
130
131static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src,
132 struct nfs_lock_context *src_lock,
133 struct file *dst, loff_t pos_dst,
134 struct nfs_lock_context *dst_lock,
135 size_t count)
136{
137 struct nfs42_copy_args args = {
138 .src_fh = NFS_FH(file_inode(src)),
139 .src_pos = pos_src,
140 .dst_fh = NFS_FH(file_inode(dst)),
141 .dst_pos = pos_dst,
142 .count = count,
143 };
144 struct nfs42_copy_res res;
145 struct rpc_message msg = {
146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
147 .rpc_argp = &args,
148 .rpc_resp = &res,
149 };
150 struct inode *dst_inode = file_inode(dst);
151 struct nfs_server *server = NFS_SERVER(dst_inode);
152 int status;
153
154 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
155 src_lock, FMODE_READ);
156 if (status)
157 return status;
158
159 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
160 pos_src, pos_src + (loff_t)count - 1);
161 if (status)
162 return status;
163
164 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
165 dst_lock, FMODE_WRITE);
166 if (status)
167 return status;
168
169 status = nfs_sync_inode(dst_inode);
170 if (status)
171 return status;
172
173 status = nfs4_call_sync(server->client, server, &msg,
174 &args.seq_args, &res.seq_res, 0);
175 if (status == -ENOTSUPP)
176 server->caps &= ~NFS_CAP_COPY;
177 if (status)
178 return status;
179
180 if (res.write_res.verifier.committed != NFS_FILE_SYNC) {
181 status = nfs_commit_file(dst, &res.write_res.verifier.verifier);
182 if (status)
183 return status;
184 }
185
186 truncate_pagecache_range(dst_inode, pos_dst,
187 pos_dst + res.write_res.count);
188
189 return res.write_res.count;
190}
191
192ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
193 struct file *dst, loff_t pos_dst,
194 size_t count)
195{
196 struct nfs_server *server = NFS_SERVER(file_inode(dst));
197 struct nfs_lock_context *src_lock;
198 struct nfs_lock_context *dst_lock;
199 struct nfs4_exception src_exception = { };
200 struct nfs4_exception dst_exception = { };
201 ssize_t err, err2;
202
203 if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
204 return -EOPNOTSUPP;
205
206 src_lock = nfs_get_lock_context(nfs_file_open_context(src));
207 if (IS_ERR(src_lock))
208 return PTR_ERR(src_lock);
209
210 src_exception.inode = file_inode(src);
211 src_exception.state = src_lock->open_context->state;
212
213 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
214 if (IS_ERR(dst_lock)) {
215 err = PTR_ERR(dst_lock);
216 goto out_put_src_lock;
217 }
218
219 dst_exception.inode = file_inode(dst);
220 dst_exception.state = dst_lock->open_context->state;
221
222 do {
223 inode_lock(file_inode(dst));
224 err = _nfs42_proc_copy(src, pos_src, src_lock,
225 dst, pos_dst, dst_lock, count);
226 inode_unlock(file_inode(dst));
227
228 if (err == -ENOTSUPP) {
229 err = -EOPNOTSUPP;
230 break;
231 }
232
233 err2 = nfs4_handle_exception(server, err, &src_exception);
234 err = nfs4_handle_exception(server, err, &dst_exception);
235 if (!err)
236 err = err2;
237 } while (src_exception.retry || dst_exception.retry);
238
239 nfs_put_lock_context(dst_lock);
240out_put_src_lock:
241 nfs_put_lock_context(src_lock);
242 return err;
243}
244
245static loff_t _nfs42_proc_llseek(struct file *filep,
246 struct nfs_lock_context *lock, loff_t offset, int whence)
247{
248 struct inode *inode = file_inode(filep);
249 struct nfs42_seek_args args = {
250 .sa_fh = NFS_FH(inode),
251 .sa_offset = offset,
252 .sa_what = (whence == SEEK_HOLE) ?
253 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
254 };
255 struct nfs42_seek_res res;
256 struct rpc_message msg = {
257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
258 .rpc_argp = &args,
259 .rpc_resp = &res,
260 };
261 struct nfs_server *server = NFS_SERVER(inode);
262 int status;
263
264 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
265 return -ENOTSUPP;
266
267 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
268 lock, FMODE_READ);
269 if (status)
270 return status;
271
272 status = nfs_filemap_write_and_wait_range(inode->i_mapping,
273 offset, LLONG_MAX);
274 if (status)
275 return status;
276
277 status = nfs4_call_sync(server->client, server, &msg,
278 &args.seq_args, &res.seq_res, 0);
279 if (status == -ENOTSUPP)
280 server->caps &= ~NFS_CAP_SEEK;
281 if (status)
282 return status;
283
284 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
285}
286
287loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
288{
289 struct nfs_server *server = NFS_SERVER(file_inode(filep));
290 struct nfs4_exception exception = { };
291 struct nfs_lock_context *lock;
292 loff_t err;
293
294 lock = nfs_get_lock_context(nfs_file_open_context(filep));
295 if (IS_ERR(lock))
296 return PTR_ERR(lock);
297
298 exception.inode = file_inode(filep);
299 exception.state = lock->open_context->state;
300
301 do {
302 err = _nfs42_proc_llseek(filep, lock, offset, whence);
303 if (err >= 0)
304 break;
305 if (err == -ENOTSUPP) {
306 err = -EOPNOTSUPP;
307 break;
308 }
309 err = nfs4_handle_exception(server, err, &exception);
310 } while (exception.retry);
311
312 nfs_put_lock_context(lock);
313 return err;
314}
315
316
317static void
318nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
319{
320 struct nfs42_layoutstat_data *data = calldata;
321 struct inode *inode = data->inode;
322 struct nfs_server *server = NFS_SERVER(inode);
323 struct pnfs_layout_hdr *lo;
324
325 spin_lock(&inode->i_lock);
326 lo = NFS_I(inode)->layout;
327 if (!pnfs_layout_is_valid(lo)) {
328 spin_unlock(&inode->i_lock);
329 rpc_exit(task, 0);
330 return;
331 }
332 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
333 spin_unlock(&inode->i_lock);
334 nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
335 &data->res.seq_res, task);
336
337}
338
339static void
340nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
341{
342 struct nfs42_layoutstat_data *data = calldata;
343 struct inode *inode = data->inode;
344 struct pnfs_layout_hdr *lo;
345
346 if (!nfs4_sequence_done(task, &data->res.seq_res))
347 return;
348
349 switch (task->tk_status) {
350 case 0:
351 break;
352 case -NFS4ERR_EXPIRED:
353 case -NFS4ERR_ADMIN_REVOKED:
354 case -NFS4ERR_DELEG_REVOKED:
355 case -NFS4ERR_STALE_STATEID:
356 case -NFS4ERR_BAD_STATEID:
357 spin_lock(&inode->i_lock);
358 lo = NFS_I(inode)->layout;
359 if (pnfs_layout_is_valid(lo) &&
360 nfs4_stateid_match(&data->args.stateid,
361 &lo->plh_stateid)) {
362 LIST_HEAD(head);
363
364
365
366
367
368 pnfs_mark_layout_stateid_invalid(lo, &head);
369 spin_unlock(&inode->i_lock);
370 pnfs_free_lseg_list(&head);
371 } else
372 spin_unlock(&inode->i_lock);
373 break;
374 case -NFS4ERR_OLD_STATEID:
375 spin_lock(&inode->i_lock);
376 lo = NFS_I(inode)->layout;
377 if (pnfs_layout_is_valid(lo) &&
378 nfs4_stateid_match_other(&data->args.stateid,
379 &lo->plh_stateid)) {
380
381 if (!nfs4_stateid_is_newer(&lo->plh_stateid,
382 &data->args.stateid))
383 rpc_delay(task, HZ);
384 rpc_restart_call_prepare(task);
385 }
386 spin_unlock(&inode->i_lock);
387 break;
388 case -ENOTSUPP:
389 case -EOPNOTSUPP:
390 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
391 }
392
393 dprintk("%s server returns %d\n", __func__, task->tk_status);
394}
395
396static void
397nfs42_layoutstat_release(void *calldata)
398{
399 struct nfs42_layoutstat_data *data = calldata;
400 struct nfs_server *nfss = NFS_SERVER(data->args.inode);
401
402 if (nfss->pnfs_curr_ld->cleanup_layoutstats)
403 nfss->pnfs_curr_ld->cleanup_layoutstats(data);
404
405 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
406 smp_mb__before_atomic();
407 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
408 smp_mb__after_atomic();
409 nfs_iput_and_deactive(data->inode);
410 kfree(data->args.devinfo);
411 kfree(data);
412}
413
414static const struct rpc_call_ops nfs42_layoutstat_ops = {
415 .rpc_call_prepare = nfs42_layoutstat_prepare,
416 .rpc_call_done = nfs42_layoutstat_done,
417 .rpc_release = nfs42_layoutstat_release,
418};
419
420int nfs42_proc_layoutstats_generic(struct nfs_server *server,
421 struct nfs42_layoutstat_data *data)
422{
423 struct rpc_message msg = {
424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
425 .rpc_argp = &data->args,
426 .rpc_resp = &data->res,
427 };
428 struct rpc_task_setup task_setup = {
429 .rpc_client = server->client,
430 .rpc_message = &msg,
431 .callback_ops = &nfs42_layoutstat_ops,
432 .callback_data = data,
433 .flags = RPC_TASK_ASYNC,
434 };
435 struct rpc_task *task;
436
437 data->inode = nfs_igrab_and_active(data->args.inode);
438 if (!data->inode) {
439 nfs42_layoutstat_release(data);
440 return -EAGAIN;
441 }
442 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
443 task = rpc_run_task(&task_setup);
444 if (IS_ERR(task))
445 return PTR_ERR(task);
446 rpc_put_task(task);
447 return 0;
448}
449
450static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
451 struct file *dst_f, struct nfs_lock_context *src_lock,
452 struct nfs_lock_context *dst_lock, loff_t src_offset,
453 loff_t dst_offset, loff_t count)
454{
455 struct inode *src_inode = file_inode(src_f);
456 struct inode *dst_inode = file_inode(dst_f);
457 struct nfs_server *server = NFS_SERVER(dst_inode);
458 struct nfs42_clone_args args = {
459 .src_fh = NFS_FH(src_inode),
460 .dst_fh = NFS_FH(dst_inode),
461 .src_offset = src_offset,
462 .dst_offset = dst_offset,
463 .count = count,
464 .dst_bitmask = server->cache_consistency_bitmask,
465 };
466 struct nfs42_clone_res res = {
467 .server = server,
468 };
469 int status;
470
471 msg->rpc_argp = &args;
472 msg->rpc_resp = &res;
473
474 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
475 src_lock, FMODE_READ);
476 if (status)
477 return status;
478
479 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
480 dst_lock, FMODE_WRITE);
481 if (status)
482 return status;
483
484 res.dst_fattr = nfs_alloc_fattr();
485 if (!res.dst_fattr)
486 return -ENOMEM;
487
488 status = nfs4_call_sync(server->client, server, msg,
489 &args.seq_args, &res.seq_res, 0);
490 if (status == 0)
491 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
492
493 kfree(res.dst_fattr);
494 return status;
495}
496
497int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
498 loff_t src_offset, loff_t dst_offset, loff_t count)
499{
500 struct rpc_message msg = {
501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
502 };
503 struct inode *inode = file_inode(src_f);
504 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
505 struct nfs_lock_context *src_lock;
506 struct nfs_lock_context *dst_lock;
507 struct nfs4_exception src_exception = { };
508 struct nfs4_exception dst_exception = { };
509 int err, err2;
510
511 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
512 return -EOPNOTSUPP;
513
514 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
515 if (IS_ERR(src_lock))
516 return PTR_ERR(src_lock);
517
518 src_exception.inode = file_inode(src_f);
519 src_exception.state = src_lock->open_context->state;
520
521 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
522 if (IS_ERR(dst_lock)) {
523 err = PTR_ERR(dst_lock);
524 goto out_put_src_lock;
525 }
526
527 dst_exception.inode = file_inode(dst_f);
528 dst_exception.state = dst_lock->open_context->state;
529
530 do {
531 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
532 src_offset, dst_offset, count);
533 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
534 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
535 err = -EOPNOTSUPP;
536 break;
537 }
538
539 err2 = nfs4_handle_exception(server, err, &src_exception);
540 err = nfs4_handle_exception(server, err, &dst_exception);
541 if (!err)
542 err = err2;
543 } while (src_exception.retry || dst_exception.retry);
544
545 nfs_put_lock_context(dst_lock);
546out_put_src_lock:
547 nfs_put_lock_context(src_lock);
548 return err;
549}
550
