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Commit | Line | Data |
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1c6dcbe5 AS |
1 | /* |
2 | * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> | |
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" | |
1b4a4bd8 PT |
13 | #include "iostat.h" |
14 | #include "pnfs.h" | |
efc6f4aa | 15 | #include "nfs4session.h" |
1b4a4bd8 PT |
16 | #include "internal.h" |
17 | ||
291e1b94 | 18 | #define NFSDBG_FACILITY NFSDBG_PROC |
1c6dcbe5 | 19 | |
f4ac1674 | 20 | static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, |
4bdf87eb | 21 | struct nfs_lock_context *lock, loff_t offset, loff_t len) |
f4ac1674 AS |
22 | { |
23 | struct inode *inode = file_inode(filep); | |
9a51940b | 24 | struct nfs_server *server = NFS_SERVER(inode); |
f4ac1674 AS |
25 | struct nfs42_falloc_args args = { |
26 | .falloc_fh = NFS_FH(inode), | |
27 | .falloc_offset = offset, | |
28 | .falloc_length = len, | |
9a51940b AS |
29 | .falloc_bitmask = server->cache_consistency_bitmask, |
30 | }; | |
31 | struct nfs42_falloc_res res = { | |
32 | .falloc_server = server, | |
f4ac1674 | 33 | }; |
f4ac1674 AS |
34 | int status; |
35 | ||
36 | msg->rpc_argp = &args; | |
37 | msg->rpc_resp = &res; | |
38 | ||
4bdf87eb CH |
39 | status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, |
40 | lock, FMODE_WRITE); | |
f4ac1674 AS |
41 | if (status) |
42 | return status; | |
43 | ||
9a51940b AS |
44 | res.falloc_fattr = nfs_alloc_fattr(); |
45 | if (!res.falloc_fattr) | |
46 | return -ENOMEM; | |
47 | ||
48 | status = nfs4_call_sync(server->client, server, msg, | |
49 | &args.seq_args, &res.seq_res, 0); | |
50 | if (status == 0) | |
51 | status = nfs_post_op_update_inode(inode, res.falloc_fattr); | |
52 | ||
53 | kfree(res.falloc_fattr); | |
54 | return status; | |
f4ac1674 AS |
55 | } |
56 | ||
57 | static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, | |
58 | loff_t offset, loff_t len) | |
59 | { | |
60 | struct nfs_server *server = NFS_SERVER(file_inode(filep)); | |
61 | struct nfs4_exception exception = { }; | |
4bdf87eb | 62 | struct nfs_lock_context *lock; |
f4ac1674 AS |
63 | int err; |
64 | ||
4bdf87eb CH |
65 | lock = nfs_get_lock_context(nfs_file_open_context(filep)); |
66 | if (IS_ERR(lock)) | |
67 | return PTR_ERR(lock); | |
68 | ||
69 | exception.inode = file_inode(filep); | |
70 | exception.state = lock->open_context->state; | |
71 | ||
f4ac1674 | 72 | do { |
4bdf87eb CH |
73 | err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); |
74 | if (err == -ENOTSUPP) { | |
75 | err = -EOPNOTSUPP; | |
76 | break; | |
77 | } | |
f4ac1674 AS |
78 | err = nfs4_handle_exception(server, err, &exception); |
79 | } while (exception.retry); | |
80 | ||
4bdf87eb | 81 | nfs_put_lock_context(lock); |
f4ac1674 AS |
82 | return err; |
83 | } | |
84 | ||
85 | int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) | |
86 | { | |
87 | struct rpc_message msg = { | |
88 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], | |
89 | }; | |
90 | struct inode *inode = file_inode(filep); | |
91 | int err; | |
92 | ||
93 | if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) | |
94 | return -EOPNOTSUPP; | |
95 | ||
5955102c | 96 | inode_lock(inode); |
f830f7dd | 97 | |
f4ac1674 AS |
98 | err = nfs42_proc_fallocate(&msg, filep, offset, len); |
99 | if (err == -EOPNOTSUPP) | |
100 | NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; | |
f830f7dd | 101 | |
5955102c | 102 | inode_unlock(inode); |
f4ac1674 AS |
103 | return err; |
104 | } | |
105 | ||
624bd5b7 AS |
106 | int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) |
107 | { | |
108 | struct rpc_message msg = { | |
109 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], | |
110 | }; | |
111 | struct inode *inode = file_inode(filep); | |
112 | int err; | |
113 | ||
114 | if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) | |
115 | return -EOPNOTSUPP; | |
116 | ||
5955102c | 117 | inode_lock(inode); |
1e564d3d TM |
118 | err = nfs_sync_inode(inode); |
119 | if (err) | |
120 | goto out_unlock; | |
f830f7dd | 121 | |
624bd5b7 | 122 | err = nfs42_proc_fallocate(&msg, filep, offset, len); |
9a51940b AS |
123 | if (err == 0) |
124 | truncate_pagecache_range(inode, offset, (offset + len) -1); | |
624bd5b7 AS |
125 | if (err == -EOPNOTSUPP) |
126 | NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; | |
1e564d3d | 127 | out_unlock: |
5955102c | 128 | inode_unlock(inode); |
624bd5b7 AS |
129 | return err; |
130 | } | |
131 | ||
9d8cacbf | 132 | static ssize_t _nfs42_proc_copy(struct file *src, |
2e72448b | 133 | struct nfs_lock_context *src_lock, |
9d8cacbf | 134 | struct file *dst, |
2e72448b | 135 | struct nfs_lock_context *dst_lock, |
9d8cacbf TM |
136 | struct nfs42_copy_args *args, |
137 | struct nfs42_copy_res *res) | |
2e72448b | 138 | { |
2e72448b AS |
139 | struct rpc_message msg = { |
140 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY], | |
9d8cacbf TM |
141 | .rpc_argp = args, |
142 | .rpc_resp = res, | |
2e72448b AS |
143 | }; |
144 | struct inode *dst_inode = file_inode(dst); | |
145 | struct nfs_server *server = NFS_SERVER(dst_inode); | |
9d8cacbf TM |
146 | loff_t pos_src = args->src_pos; |
147 | loff_t pos_dst = args->dst_pos; | |
148 | size_t count = args->count; | |
1ee48bdd | 149 | ssize_t status; |
2e72448b | 150 | |
9d8cacbf | 151 | status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context, |
2e72448b AS |
152 | src_lock, FMODE_READ); |
153 | if (status) | |
154 | return status; | |
155 | ||
837bb1d7 TM |
156 | status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping, |
157 | pos_src, pos_src + (loff_t)count - 1); | |
158 | if (status) | |
159 | return status; | |
160 | ||
9d8cacbf | 161 | status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context, |
2e72448b AS |
162 | dst_lock, FMODE_WRITE); |
163 | if (status) | |
164 | return status; | |
837bb1d7 TM |
165 | |
166 | status = nfs_sync_inode(dst_inode); | |
167 | if (status) | |
168 | return status; | |
2e72448b | 169 | |
e0926934 OK |
170 | res->commit_res.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS); |
171 | if (!res->commit_res.verf) | |
172 | return -ENOMEM; | |
2e72448b | 173 | status = nfs4_call_sync(server->client, server, &msg, |
9d8cacbf | 174 | &args->seq_args, &res->seq_res, 0); |
2e72448b AS |
175 | if (status == -ENOTSUPP) |
176 | server->caps &= ~NFS_CAP_COPY; | |
177 | if (status) | |
e0926934 | 178 | goto out; |
2e72448b | 179 | |
6d3b5d8d | 180 | if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier, |
e0926934 OK |
181 | &res->commit_res.verf->verifier)) { |
182 | status = -EAGAIN; | |
183 | goto out; | |
2e72448b AS |
184 | } |
185 | ||
186 | truncate_pagecache_range(dst_inode, pos_dst, | |
9d8cacbf | 187 | pos_dst + res->write_res.count); |
2e72448b | 188 | |
e0926934 OK |
189 | status = res->write_res.count; |
190 | out: | |
191 | kfree(res->commit_res.verf); | |
192 | return status; | |
2e72448b AS |
193 | } |
194 | ||
195 | ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, | |
196 | struct file *dst, loff_t pos_dst, | |
197 | size_t count) | |
198 | { | |
199 | struct nfs_server *server = NFS_SERVER(file_inode(dst)); | |
200 | struct nfs_lock_context *src_lock; | |
201 | struct nfs_lock_context *dst_lock; | |
9d8cacbf TM |
202 | struct nfs42_copy_args args = { |
203 | .src_fh = NFS_FH(file_inode(src)), | |
204 | .src_pos = pos_src, | |
205 | .dst_fh = NFS_FH(file_inode(dst)), | |
206 | .dst_pos = pos_dst, | |
207 | .count = count, | |
208 | }; | |
209 | struct nfs42_copy_res res; | |
210 | struct nfs4_exception src_exception = { | |
211 | .inode = file_inode(src), | |
212 | .stateid = &args.src_stateid, | |
213 | }; | |
214 | struct nfs4_exception dst_exception = { | |
215 | .inode = file_inode(dst), | |
216 | .stateid = &args.dst_stateid, | |
217 | }; | |
2e72448b AS |
218 | ssize_t err, err2; |
219 | ||
220 | if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY)) | |
221 | return -EOPNOTSUPP; | |
222 | ||
223 | src_lock = nfs_get_lock_context(nfs_file_open_context(src)); | |
224 | if (IS_ERR(src_lock)) | |
225 | return PTR_ERR(src_lock); | |
226 | ||
2e72448b AS |
227 | src_exception.state = src_lock->open_context->state; |
228 | ||
229 | dst_lock = nfs_get_lock_context(nfs_file_open_context(dst)); | |
230 | if (IS_ERR(dst_lock)) { | |
231 | err = PTR_ERR(dst_lock); | |
232 | goto out_put_src_lock; | |
233 | } | |
234 | ||
2e72448b AS |
235 | dst_exception.state = dst_lock->open_context->state; |
236 | ||
237 | do { | |
ea8ea737 | 238 | inode_lock(file_inode(dst)); |
9d8cacbf TM |
239 | err = _nfs42_proc_copy(src, src_lock, |
240 | dst, dst_lock, | |
241 | &args, &res); | |
ea8ea737 | 242 | inode_unlock(file_inode(dst)); |
2e72448b | 243 | |
9d8cacbf TM |
244 | if (err >= 0) |
245 | break; | |
2e72448b AS |
246 | if (err == -ENOTSUPP) { |
247 | err = -EOPNOTSUPP; | |
248 | break; | |
e0926934 OK |
249 | } if (err == -EAGAIN) { |
250 | dst_exception.retry = 1; | |
251 | continue; | |
2e72448b AS |
252 | } |
253 | ||
254 | err2 = nfs4_handle_exception(server, err, &src_exception); | |
255 | err = nfs4_handle_exception(server, err, &dst_exception); | |
256 | if (!err) | |
257 | err = err2; | |
258 | } while (src_exception.retry || dst_exception.retry); | |
259 | ||
260 | nfs_put_lock_context(dst_lock); | |
261 | out_put_src_lock: | |
262 | nfs_put_lock_context(src_lock); | |
263 | return err; | |
264 | } | |
265 | ||
4bdf87eb CH |
266 | static loff_t _nfs42_proc_llseek(struct file *filep, |
267 | struct nfs_lock_context *lock, loff_t offset, int whence) | |
1c6dcbe5 AS |
268 | { |
269 | struct inode *inode = file_inode(filep); | |
270 | struct nfs42_seek_args args = { | |
271 | .sa_fh = NFS_FH(inode), | |
272 | .sa_offset = offset, | |
273 | .sa_what = (whence == SEEK_HOLE) ? | |
274 | NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, | |
275 | }; | |
276 | struct nfs42_seek_res res; | |
277 | struct rpc_message msg = { | |
278 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], | |
279 | .rpc_argp = &args, | |
280 | .rpc_resp = &res, | |
281 | }; | |
282 | struct nfs_server *server = NFS_SERVER(inode); | |
283 | int status; | |
284 | ||
878ffa9f | 285 | if (!nfs_server_capable(inode, NFS_CAP_SEEK)) |
1c6dcbe5 AS |
286 | return -ENOTSUPP; |
287 | ||
4bdf87eb CH |
288 | status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, |
289 | lock, FMODE_READ); | |
1c6dcbe5 AS |
290 | if (status) |
291 | return status; | |
292 | ||
e95fc4a0 TM |
293 | status = nfs_filemap_write_and_wait_range(inode->i_mapping, |
294 | offset, LLONG_MAX); | |
295 | if (status) | |
296 | return status; | |
297 | ||
1c6dcbe5 AS |
298 | status = nfs4_call_sync(server->client, server, &msg, |
299 | &args.seq_args, &res.seq_res, 0); | |
300 | if (status == -ENOTSUPP) | |
301 | server->caps &= ~NFS_CAP_SEEK; | |
302 | if (status) | |
303 | return status; | |
304 | ||
305 | return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); | |
306 | } | |
be3a5d23 | 307 | |
bdcc2cd1 BF |
308 | loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) |
309 | { | |
310 | struct nfs_server *server = NFS_SERVER(file_inode(filep)); | |
311 | struct nfs4_exception exception = { }; | |
4bdf87eb | 312 | struct nfs_lock_context *lock; |
306a5549 | 313 | loff_t err; |
bdcc2cd1 | 314 | |
4bdf87eb CH |
315 | lock = nfs_get_lock_context(nfs_file_open_context(filep)); |
316 | if (IS_ERR(lock)) | |
317 | return PTR_ERR(lock); | |
318 | ||
319 | exception.inode = file_inode(filep); | |
320 | exception.state = lock->open_context->state; | |
321 | ||
bdcc2cd1 | 322 | do { |
4bdf87eb | 323 | err = _nfs42_proc_llseek(filep, lock, offset, whence); |
306a5549 BF |
324 | if (err >= 0) |
325 | break; | |
4bdf87eb CH |
326 | if (err == -ENOTSUPP) { |
327 | err = -EOPNOTSUPP; | |
328 | break; | |
329 | } | |
bdcc2cd1 BF |
330 | err = nfs4_handle_exception(server, err, &exception); |
331 | } while (exception.retry); | |
332 | ||
4bdf87eb | 333 | nfs_put_lock_context(lock); |
bdcc2cd1 BF |
334 | return err; |
335 | } | |
336 | ||
337 | ||
1b4a4bd8 PT |
338 | static void |
339 | nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) | |
340 | { | |
341 | struct nfs42_layoutstat_data *data = calldata; | |
9a0fe867 TM |
342 | struct inode *inode = data->inode; |
343 | struct nfs_server *server = NFS_SERVER(inode); | |
344 | struct pnfs_layout_hdr *lo; | |
1b4a4bd8 | 345 | |
9a0fe867 TM |
346 | spin_lock(&inode->i_lock); |
347 | lo = NFS_I(inode)->layout; | |
348 | if (!pnfs_layout_is_valid(lo)) { | |
349 | spin_unlock(&inode->i_lock); | |
350 | rpc_exit(task, 0); | |
351 | return; | |
352 | } | |
353 | nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid); | |
354 | spin_unlock(&inode->i_lock); | |
6de7e12f AS |
355 | nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, |
356 | &data->res.seq_res, task); | |
1b4a4bd8 PT |
357 | } |
358 | ||
359 | static void | |
360 | nfs42_layoutstat_done(struct rpc_task *task, void *calldata) | |
361 | { | |
362 | struct nfs42_layoutstat_data *data = calldata; | |
68d264cf PT |
363 | struct inode *inode = data->inode; |
364 | struct pnfs_layout_hdr *lo; | |
1b4a4bd8 PT |
365 | |
366 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
367 | return; | |
368 | ||
6c5a0d89 TM |
369 | switch (task->tk_status) { |
370 | case 0: | |
371 | break; | |
68d264cf | 372 | case -NFS4ERR_EXPIRED: |
206b3bb5 TM |
373 | case -NFS4ERR_ADMIN_REVOKED: |
374 | case -NFS4ERR_DELEG_REVOKED: | |
68d264cf | 375 | case -NFS4ERR_STALE_STATEID: |
68d264cf PT |
376 | case -NFS4ERR_BAD_STATEID: |
377 | spin_lock(&inode->i_lock); | |
378 | lo = NFS_I(inode)->layout; | |
9a0fe867 TM |
379 | if (pnfs_layout_is_valid(lo) && |
380 | nfs4_stateid_match(&data->args.stateid, | |
68d264cf PT |
381 | &lo->plh_stateid)) { |
382 | LIST_HEAD(head); | |
383 | ||
384 | /* | |
385 | * Mark the bad layout state as invalid, then retry | |
386 | * with the current stateid. | |
387 | */ | |
5f46be04 | 388 | pnfs_mark_layout_stateid_invalid(lo, &head); |
68d264cf PT |
389 | spin_unlock(&inode->i_lock); |
390 | pnfs_free_lseg_list(&head); | |
1f18b82c | 391 | nfs_commit_inode(inode, 0); |
68d264cf PT |
392 | } else |
393 | spin_unlock(&inode->i_lock); | |
394 | break; | |
9a0fe867 TM |
395 | case -NFS4ERR_OLD_STATEID: |
396 | spin_lock(&inode->i_lock); | |
397 | lo = NFS_I(inode)->layout; | |
398 | if (pnfs_layout_is_valid(lo) && | |
399 | nfs4_stateid_match_other(&data->args.stateid, | |
400 | &lo->plh_stateid)) { | |
401 | /* Do we need to delay before resending? */ | |
402 | if (!nfs4_stateid_is_newer(&lo->plh_stateid, | |
403 | &data->args.stateid)) | |
404 | rpc_delay(task, HZ); | |
405 | rpc_restart_call_prepare(task); | |
406 | } | |
407 | spin_unlock(&inode->i_lock); | |
408 | break; | |
6c5a0d89 TM |
409 | case -ENOTSUPP: |
410 | case -EOPNOTSUPP: | |
68d264cf | 411 | NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; |
6c5a0d89 | 412 | } |
1b4a4bd8 PT |
413 | } |
414 | ||
415 | static void | |
416 | nfs42_layoutstat_release(void *calldata) | |
417 | { | |
418 | struct nfs42_layoutstat_data *data = calldata; | |
422c93c8 TM |
419 | struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo; |
420 | int i; | |
8733408d | 421 | |
422c93c8 TM |
422 | for (i = 0; i < data->args.num_dev; i++) { |
423 | if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free) | |
424 | devinfo[i].ld_private.ops->free(&devinfo[i].ld_private); | |
425 | } | |
1b4a4bd8 PT |
426 | |
427 | pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); | |
1bfe3b25 PT |
428 | smp_mb__before_atomic(); |
429 | clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); | |
430 | smp_mb__after_atomic(); | |
1b4a4bd8 PT |
431 | nfs_iput_and_deactive(data->inode); |
432 | kfree(data->args.devinfo); | |
433 | kfree(data); | |
434 | } | |
435 | ||
be3a5d23 | 436 | static const struct rpc_call_ops nfs42_layoutstat_ops = { |
1b4a4bd8 PT |
437 | .rpc_call_prepare = nfs42_layoutstat_prepare, |
438 | .rpc_call_done = nfs42_layoutstat_done, | |
439 | .rpc_release = nfs42_layoutstat_release, | |
be3a5d23 TM |
440 | }; |
441 | ||
442 | int nfs42_proc_layoutstats_generic(struct nfs_server *server, | |
443 | struct nfs42_layoutstat_data *data) | |
444 | { | |
445 | struct rpc_message msg = { | |
446 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], | |
447 | .rpc_argp = &data->args, | |
448 | .rpc_resp = &data->res, | |
449 | }; | |
450 | struct rpc_task_setup task_setup = { | |
451 | .rpc_client = server->client, | |
452 | .rpc_message = &msg, | |
453 | .callback_ops = &nfs42_layoutstat_ops, | |
454 | .callback_data = data, | |
455 | .flags = RPC_TASK_ASYNC, | |
456 | }; | |
457 | struct rpc_task *task; | |
458 | ||
1b4a4bd8 PT |
459 | data->inode = nfs_igrab_and_active(data->args.inode); |
460 | if (!data->inode) { | |
461 | nfs42_layoutstat_release(data); | |
462 | return -EAGAIN; | |
463 | } | |
be3a5d23 TM |
464 | nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); |
465 | task = rpc_run_task(&task_setup); | |
466 | if (IS_ERR(task)) | |
467 | return PTR_ERR(task); | |
3f807e5a | 468 | rpc_put_task(task); |
be3a5d23 TM |
469 | return 0; |
470 | } | |
e5341f3a PT |
471 | |
472 | static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, | |
4bdf87eb CH |
473 | struct file *dst_f, struct nfs_lock_context *src_lock, |
474 | struct nfs_lock_context *dst_lock, loff_t src_offset, | |
475 | loff_t dst_offset, loff_t count) | |
e5341f3a PT |
476 | { |
477 | struct inode *src_inode = file_inode(src_f); | |
478 | struct inode *dst_inode = file_inode(dst_f); | |
479 | struct nfs_server *server = NFS_SERVER(dst_inode); | |
480 | struct nfs42_clone_args args = { | |
481 | .src_fh = NFS_FH(src_inode), | |
482 | .dst_fh = NFS_FH(dst_inode), | |
483 | .src_offset = src_offset, | |
484 | .dst_offset = dst_offset, | |
9494b2ce | 485 | .count = count, |
e5341f3a PT |
486 | .dst_bitmask = server->cache_consistency_bitmask, |
487 | }; | |
488 | struct nfs42_clone_res res = { | |
489 | .server = server, | |
490 | }; | |
491 | int status; | |
492 | ||
493 | msg->rpc_argp = &args; | |
494 | msg->rpc_resp = &res; | |
495 | ||
4bdf87eb CH |
496 | status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, |
497 | src_lock, FMODE_READ); | |
e5341f3a PT |
498 | if (status) |
499 | return status; | |
500 | ||
4bdf87eb CH |
501 | status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, |
502 | dst_lock, FMODE_WRITE); | |
e5341f3a PT |
503 | if (status) |
504 | return status; | |
505 | ||
506 | res.dst_fattr = nfs_alloc_fattr(); | |
507 | if (!res.dst_fattr) | |
508 | return -ENOMEM; | |
509 | ||
510 | status = nfs4_call_sync(server->client, server, msg, | |
511 | &args.seq_args, &res.seq_res, 0); | |
512 | if (status == 0) | |
513 | status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); | |
514 | ||
515 | kfree(res.dst_fattr); | |
516 | return status; | |
517 | } | |
518 | ||
519 | int nfs42_proc_clone(struct file *src_f, struct file *dst_f, | |
520 | loff_t src_offset, loff_t dst_offset, loff_t count) | |
521 | { | |
522 | struct rpc_message msg = { | |
523 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], | |
524 | }; | |
525 | struct inode *inode = file_inode(src_f); | |
526 | struct nfs_server *server = NFS_SERVER(file_inode(src_f)); | |
4bdf87eb CH |
527 | struct nfs_lock_context *src_lock; |
528 | struct nfs_lock_context *dst_lock; | |
529 | struct nfs4_exception src_exception = { }; | |
530 | struct nfs4_exception dst_exception = { }; | |
531 | int err, err2; | |
e5341f3a PT |
532 | |
533 | if (!nfs_server_capable(inode, NFS_CAP_CLONE)) | |
534 | return -EOPNOTSUPP; | |
535 | ||
4bdf87eb CH |
536 | src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); |
537 | if (IS_ERR(src_lock)) | |
538 | return PTR_ERR(src_lock); | |
539 | ||
540 | src_exception.inode = file_inode(src_f); | |
541 | src_exception.state = src_lock->open_context->state; | |
542 | ||
543 | dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); | |
544 | if (IS_ERR(dst_lock)) { | |
545 | err = PTR_ERR(dst_lock); | |
546 | goto out_put_src_lock; | |
547 | } | |
548 | ||
549 | dst_exception.inode = file_inode(dst_f); | |
550 | dst_exception.state = dst_lock->open_context->state; | |
551 | ||
e5341f3a | 552 | do { |
4bdf87eb CH |
553 | err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, |
554 | src_offset, dst_offset, count); | |
e5341f3a PT |
555 | if (err == -ENOTSUPP || err == -EOPNOTSUPP) { |
556 | NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; | |
4bdf87eb CH |
557 | err = -EOPNOTSUPP; |
558 | break; | |
e5341f3a | 559 | } |
e5341f3a | 560 | |
4bdf87eb CH |
561 | err2 = nfs4_handle_exception(server, err, &src_exception); |
562 | err = nfs4_handle_exception(server, err, &dst_exception); | |
563 | if (!err) | |
564 | err = err2; | |
565 | } while (src_exception.retry || dst_exception.retry); | |
e5341f3a | 566 | |
4bdf87eb CH |
567 | nfs_put_lock_context(dst_lock); |
568 | out_put_src_lock: | |
569 | nfs_put_lock_context(src_lock); | |
570 | return err; | |
e5341f3a | 571 | } |