Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1c6dcbe5 AS |
2 | /* |
3 | * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> | |
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" | |
1b4a4bd8 PT |
14 | #include "iostat.h" |
15 | #include "pnfs.h" | |
efc6f4aa | 16 | #include "nfs4session.h" |
1b4a4bd8 PT |
17 | #include "internal.h" |
18 | ||
291e1b94 | 19 | #define NFSDBG_FACILITY NFSDBG_PROC |
1c6dcbe5 | 20 | |
f4ac1674 | 21 | static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, |
4bdf87eb | 22 | struct nfs_lock_context *lock, loff_t offset, loff_t len) |
f4ac1674 AS |
23 | { |
24 | struct inode *inode = file_inode(filep); | |
9a51940b | 25 | struct nfs_server *server = NFS_SERVER(inode); |
f4ac1674 AS |
26 | struct nfs42_falloc_args args = { |
27 | .falloc_fh = NFS_FH(inode), | |
28 | .falloc_offset = offset, | |
29 | .falloc_length = len, | |
9a51940b AS |
30 | .falloc_bitmask = server->cache_consistency_bitmask, |
31 | }; | |
32 | struct nfs42_falloc_res res = { | |
33 | .falloc_server = server, | |
f4ac1674 | 34 | }; |
f4ac1674 AS |
35 | int status; |
36 | ||
37 | msg->rpc_argp = &args; | |
38 | msg->rpc_resp = &res; | |
39 | ||
4bdf87eb CH |
40 | status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, |
41 | lock, FMODE_WRITE); | |
f4ac1674 AS |
42 | if (status) |
43 | return status; | |
44 | ||
9a51940b AS |
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; | |
f4ac1674 AS |
56 | } |
57 | ||
58 | static 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 = { }; | |
4bdf87eb | 63 | struct nfs_lock_context *lock; |
f4ac1674 AS |
64 | int err; |
65 | ||
4bdf87eb CH |
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 | ||
f4ac1674 | 73 | do { |
4bdf87eb CH |
74 | err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); |
75 | if (err == -ENOTSUPP) { | |
76 | err = -EOPNOTSUPP; | |
77 | break; | |
78 | } | |
f4ac1674 AS |
79 | err = nfs4_handle_exception(server, err, &exception); |
80 | } while (exception.retry); | |
81 | ||
4bdf87eb | 82 | nfs_put_lock_context(lock); |
f4ac1674 AS |
83 | return err; |
84 | } | |
85 | ||
86 | int 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 | ||
5955102c | 97 | inode_lock(inode); |
f830f7dd | 98 | |
f4ac1674 AS |
99 | err = nfs42_proc_fallocate(&msg, filep, offset, len); |
100 | if (err == -EOPNOTSUPP) | |
101 | NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; | |
f830f7dd | 102 | |
5955102c | 103 | inode_unlock(inode); |
f4ac1674 AS |
104 | return err; |
105 | } | |
106 | ||
624bd5b7 AS |
107 | int 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 | ||
5955102c | 118 | inode_lock(inode); |
1e564d3d TM |
119 | err = nfs_sync_inode(inode); |
120 | if (err) | |
121 | goto out_unlock; | |
f830f7dd | 122 | |
624bd5b7 | 123 | err = nfs42_proc_fallocate(&msg, filep, offset, len); |
9a51940b AS |
124 | if (err == 0) |
125 | truncate_pagecache_range(inode, offset, (offset + len) -1); | |
624bd5b7 AS |
126 | if (err == -EOPNOTSUPP) |
127 | NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; | |
1e564d3d | 128 | out_unlock: |
5955102c | 129 | inode_unlock(inode); |
624bd5b7 AS |
130 | return err; |
131 | } | |
132 | ||
9d8cacbf | 133 | static ssize_t _nfs42_proc_copy(struct file *src, |
2e72448b | 134 | struct nfs_lock_context *src_lock, |
9d8cacbf | 135 | struct file *dst, |
2e72448b | 136 | struct nfs_lock_context *dst_lock, |
9d8cacbf TM |
137 | struct nfs42_copy_args *args, |
138 | struct nfs42_copy_res *res) | |
2e72448b | 139 | { |
2e72448b AS |
140 | struct rpc_message msg = { |
141 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY], | |
9d8cacbf TM |
142 | .rpc_argp = args, |
143 | .rpc_resp = res, | |
2e72448b AS |
144 | }; |
145 | struct inode *dst_inode = file_inode(dst); | |
146 | struct nfs_server *server = NFS_SERVER(dst_inode); | |
9d8cacbf TM |
147 | loff_t pos_src = args->src_pos; |
148 | loff_t pos_dst = args->dst_pos; | |
149 | size_t count = args->count; | |
1ee48bdd | 150 | ssize_t status; |
2e72448b | 151 | |
9d8cacbf | 152 | status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context, |
2e72448b AS |
153 | src_lock, FMODE_READ); |
154 | if (status) | |
155 | return status; | |
156 | ||
837bb1d7 TM |
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 | ||
9d8cacbf | 162 | status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context, |
2e72448b AS |
163 | dst_lock, FMODE_WRITE); |
164 | if (status) | |
165 | return status; | |
837bb1d7 TM |
166 | |
167 | status = nfs_sync_inode(dst_inode); | |
168 | if (status) | |
169 | return status; | |
2e72448b | 170 | |
e0926934 OK |
171 | res->commit_res.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS); |
172 | if (!res->commit_res.verf) | |
173 | return -ENOMEM; | |
2e72448b | 174 | status = nfs4_call_sync(server->client, server, &msg, |
9d8cacbf | 175 | &args->seq_args, &res->seq_res, 0); |
2e72448b AS |
176 | if (status == -ENOTSUPP) |
177 | server->caps &= ~NFS_CAP_COPY; | |
178 | if (status) | |
e0926934 | 179 | goto out; |
2e72448b | 180 | |
6d3b5d8d | 181 | if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier, |
e0926934 OK |
182 | &res->commit_res.verf->verifier)) { |
183 | status = -EAGAIN; | |
184 | goto out; | |
2e72448b AS |
185 | } |
186 | ||
187 | truncate_pagecache_range(dst_inode, pos_dst, | |
9d8cacbf | 188 | pos_dst + res->write_res.count); |
2e72448b | 189 | |
e0926934 OK |
190 | status = res->write_res.count; |
191 | out: | |
192 | kfree(res->commit_res.verf); | |
193 | return status; | |
2e72448b AS |
194 | } |
195 | ||
196 | ssize_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; | |
9d8cacbf TM |
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 | }; | |
2e72448b AS |
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 | ||
2e72448b AS |
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 | ||
2e72448b AS |
236 | dst_exception.state = dst_lock->open_context->state; |
237 | ||
238 | do { | |
ea8ea737 | 239 | inode_lock(file_inode(dst)); |
9d8cacbf TM |
240 | err = _nfs42_proc_copy(src, src_lock, |
241 | dst, dst_lock, | |
242 | &args, &res); | |
ea8ea737 | 243 | inode_unlock(file_inode(dst)); |
2e72448b | 244 | |
9d8cacbf TM |
245 | if (err >= 0) |
246 | break; | |
2e72448b AS |
247 | if (err == -ENOTSUPP) { |
248 | err = -EOPNOTSUPP; | |
249 | break; | |
e0926934 OK |
250 | } if (err == -EAGAIN) { |
251 | dst_exception.retry = 1; | |
252 | continue; | |
2e72448b AS |
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); | |
262 | out_put_src_lock: | |
263 | nfs_put_lock_context(src_lock); | |
264 | return err; | |
265 | } | |
266 | ||
4bdf87eb CH |
267 | static loff_t _nfs42_proc_llseek(struct file *filep, |
268 | struct nfs_lock_context *lock, loff_t offset, int whence) | |
1c6dcbe5 AS |
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 | ||
878ffa9f | 286 | if (!nfs_server_capable(inode, NFS_CAP_SEEK)) |
1c6dcbe5 AS |
287 | return -ENOTSUPP; |
288 | ||
4bdf87eb CH |
289 | status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, |
290 | lock, FMODE_READ); | |
1c6dcbe5 AS |
291 | if (status) |
292 | return status; | |
293 | ||
e95fc4a0 TM |
294 | status = nfs_filemap_write_and_wait_range(inode->i_mapping, |
295 | offset, LLONG_MAX); | |
296 | if (status) | |
297 | return status; | |
298 | ||
1c6dcbe5 AS |
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 | } | |
be3a5d23 | 308 | |
bdcc2cd1 BF |
309 | loff_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 = { }; | |
4bdf87eb | 313 | struct nfs_lock_context *lock; |
306a5549 | 314 | loff_t err; |
bdcc2cd1 | 315 | |
4bdf87eb CH |
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 | ||
bdcc2cd1 | 323 | do { |
4bdf87eb | 324 | err = _nfs42_proc_llseek(filep, lock, offset, whence); |
306a5549 BF |
325 | if (err >= 0) |
326 | break; | |
4bdf87eb CH |
327 | if (err == -ENOTSUPP) { |
328 | err = -EOPNOTSUPP; | |
329 | break; | |
330 | } | |
bdcc2cd1 BF |
331 | err = nfs4_handle_exception(server, err, &exception); |
332 | } while (exception.retry); | |
333 | ||
4bdf87eb | 334 | nfs_put_lock_context(lock); |
bdcc2cd1 BF |
335 | return err; |
336 | } | |
337 | ||
338 | ||
1b4a4bd8 PT |
339 | static void |
340 | nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) | |
341 | { | |
342 | struct nfs42_layoutstat_data *data = calldata; | |
9a0fe867 TM |
343 | struct inode *inode = data->inode; |
344 | struct nfs_server *server = NFS_SERVER(inode); | |
345 | struct pnfs_layout_hdr *lo; | |
1b4a4bd8 | 346 | |
9a0fe867 TM |
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); | |
6de7e12f AS |
356 | nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, |
357 | &data->res.seq_res, task); | |
1b4a4bd8 PT |
358 | } |
359 | ||
360 | static void | |
361 | nfs42_layoutstat_done(struct rpc_task *task, void *calldata) | |
362 | { | |
363 | struct nfs42_layoutstat_data *data = calldata; | |
68d264cf PT |
364 | struct inode *inode = data->inode; |
365 | struct pnfs_layout_hdr *lo; | |
1b4a4bd8 PT |
366 | |
367 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
368 | return; | |
369 | ||
6c5a0d89 TM |
370 | switch (task->tk_status) { |
371 | case 0: | |
372 | break; | |
68d264cf | 373 | case -NFS4ERR_EXPIRED: |
206b3bb5 TM |
374 | case -NFS4ERR_ADMIN_REVOKED: |
375 | case -NFS4ERR_DELEG_REVOKED: | |
68d264cf | 376 | case -NFS4ERR_STALE_STATEID: |
68d264cf PT |
377 | case -NFS4ERR_BAD_STATEID: |
378 | spin_lock(&inode->i_lock); | |
379 | lo = NFS_I(inode)->layout; | |
9a0fe867 TM |
380 | if (pnfs_layout_is_valid(lo) && |
381 | nfs4_stateid_match(&data->args.stateid, | |
68d264cf PT |
382 | &lo->plh_stateid)) { |
383 | LIST_HEAD(head); | |
384 | ||
385 | /* | |
386 | * Mark the bad layout state as invalid, then retry | |
387 | * with the current stateid. | |
388 | */ | |
5f46be04 | 389 | pnfs_mark_layout_stateid_invalid(lo, &head); |
68d264cf PT |
390 | spin_unlock(&inode->i_lock); |
391 | pnfs_free_lseg_list(&head); | |
1f18b82c | 392 | nfs_commit_inode(inode, 0); |
68d264cf PT |
393 | } else |
394 | spin_unlock(&inode->i_lock); | |
395 | break; | |
9a0fe867 TM |
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 | /* Do we need to delay before resending? */ | |
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; | |
6c5a0d89 TM |
410 | case -ENOTSUPP: |
411 | case -EOPNOTSUPP: | |
68d264cf | 412 | NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; |
6c5a0d89 | 413 | } |
1b4a4bd8 PT |
414 | } |
415 | ||
416 | static void | |
417 | nfs42_layoutstat_release(void *calldata) | |
418 | { | |
419 | struct nfs42_layoutstat_data *data = calldata; | |
422c93c8 TM |
420 | struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo; |
421 | int i; | |
8733408d | 422 | |
422c93c8 TM |
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 | } | |
1b4a4bd8 PT |
427 | |
428 | pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); | |
1bfe3b25 PT |
429 | smp_mb__before_atomic(); |
430 | clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); | |
431 | smp_mb__after_atomic(); | |
1b4a4bd8 PT |
432 | nfs_iput_and_deactive(data->inode); |
433 | kfree(data->args.devinfo); | |
434 | kfree(data); | |
435 | } | |
436 | ||
be3a5d23 | 437 | static const struct rpc_call_ops nfs42_layoutstat_ops = { |
1b4a4bd8 PT |
438 | .rpc_call_prepare = nfs42_layoutstat_prepare, |
439 | .rpc_call_done = nfs42_layoutstat_done, | |
440 | .rpc_release = nfs42_layoutstat_release, | |
be3a5d23 TM |
441 | }; |
442 | ||
443 | int 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 | ||
1b4a4bd8 PT |
460 | data->inode = nfs_igrab_and_active(data->args.inode); |
461 | if (!data->inode) { | |
462 | nfs42_layoutstat_release(data); | |
463 | return -EAGAIN; | |
464 | } | |
be3a5d23 TM |
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); | |
3f807e5a | 469 | rpc_put_task(task); |
be3a5d23 TM |
470 | return 0; |
471 | } | |
e5341f3a PT |
472 | |
473 | static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, | |
4bdf87eb CH |
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) | |
e5341f3a PT |
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, | |
9494b2ce | 486 | .count = count, |
e5341f3a PT |
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 | ||
4bdf87eb CH |
497 | status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, |
498 | src_lock, FMODE_READ); | |
e5341f3a PT |
499 | if (status) |
500 | return status; | |
501 | ||
4bdf87eb CH |
502 | status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, |
503 | dst_lock, FMODE_WRITE); | |
e5341f3a PT |
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 | ||
520 | int 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)); | |
4bdf87eb CH |
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; | |
e5341f3a PT |
533 | |
534 | if (!nfs_server_capable(inode, NFS_CAP_CLONE)) | |
535 | return -EOPNOTSUPP; | |
536 | ||
4bdf87eb CH |
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 | ||
e5341f3a | 553 | do { |
4bdf87eb CH |
554 | err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, |
555 | src_offset, dst_offset, count); | |
e5341f3a PT |
556 | if (err == -ENOTSUPP || err == -EOPNOTSUPP) { |
557 | NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; | |
4bdf87eb CH |
558 | err = -EOPNOTSUPP; |
559 | break; | |
e5341f3a | 560 | } |
e5341f3a | 561 | |
4bdf87eb CH |
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); | |
e5341f3a | 567 | |
4bdf87eb CH |
568 | nfs_put_lock_context(dst_lock); |
569 | out_put_src_lock: | |
570 | nfs_put_lock_context(src_lock); | |
571 | return err; | |
e5341f3a | 572 | } |