Commit | Line | Data |
---|---|---|
85e174ba RL |
1 | /* |
2 | * pNFS functions to call and manage layout drivers. | |
3 | * | |
4 | * Copyright (c) 2002 [year of first publication] | |
5 | * The Regents of the University of Michigan | |
6 | * All Rights Reserved | |
7 | * | |
8 | * Dean Hildebrand <dhildebz@umich.edu> | |
9 | * | |
10 | * Permission is granted to use, copy, create derivative works, and | |
11 | * redistribute this software and such derivative works for any purpose, | |
12 | * so long as the name of the University of Michigan is not used in | |
13 | * any advertising or publicity pertaining to the use or distribution | |
14 | * of this software without specific, written prior authorization. If | |
15 | * the above copyright notice or any other identification of the | |
16 | * University of Michigan is included in any copy of any portion of | |
17 | * this software, then the disclaimer below must also be included. | |
18 | * | |
19 | * This software is provided as is, without representation or warranty | |
20 | * of any kind either express or implied, including without limitation | |
21 | * the implied warranties of merchantability, fitness for a particular | |
22 | * purpose, or noninfringement. The Regents of the University of | |
23 | * Michigan shall not be liable for any damages, including special, | |
24 | * indirect, incidental, or consequential damages, with respect to any | |
25 | * claim arising out of or in connection with the use of the software, | |
26 | * even if it has been or is hereafter advised of the possibility of | |
27 | * such damages. | |
28 | */ | |
29 | ||
30 | #include <linux/nfs_fs.h> | |
493292dd | 31 | #include <linux/nfs_page.h> |
974cec8c | 32 | #include "internal.h" |
85e174ba | 33 | #include "pnfs.h" |
64419a9b | 34 | #include "iostat.h" |
85e174ba RL |
35 | |
36 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
37 | ||
02c35fca FI |
38 | /* Locking: |
39 | * | |
40 | * pnfs_spinlock: | |
41 | * protects pnfs_modules_tbl. | |
42 | */ | |
43 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
44 | ||
45 | /* | |
46 | * pnfs_modules_tbl holds all pnfs modules | |
47 | */ | |
48 | static LIST_HEAD(pnfs_modules_tbl); | |
49 | ||
50 | /* Return the registered pnfs layout driver module matching given id */ | |
51 | static struct pnfs_layoutdriver_type * | |
52 | find_pnfs_driver_locked(u32 id) | |
53 | { | |
54 | struct pnfs_layoutdriver_type *local; | |
55 | ||
56 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
57 | if (local->id == id) | |
58 | goto out; | |
59 | local = NULL; | |
60 | out: | |
61 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
62 | return local; | |
63 | } | |
64 | ||
85e174ba RL |
65 | static struct pnfs_layoutdriver_type * |
66 | find_pnfs_driver(u32 id) | |
67 | { | |
02c35fca FI |
68 | struct pnfs_layoutdriver_type *local; |
69 | ||
70 | spin_lock(&pnfs_spinlock); | |
71 | local = find_pnfs_driver_locked(id); | |
72 | spin_unlock(&pnfs_spinlock); | |
73 | return local; | |
85e174ba RL |
74 | } |
75 | ||
76 | void | |
77 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
78 | { | |
ea8eecdd | 79 | if (nfss->pnfs_curr_ld) |
02c35fca | 80 | module_put(nfss->pnfs_curr_ld->owner); |
85e174ba RL |
81 | nfss->pnfs_curr_ld = NULL; |
82 | } | |
83 | ||
84 | /* | |
85 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
86 | * Currently only one pNFS layout driver per filesystem is supported. | |
87 | * | |
88 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
89 | */ | |
90 | void | |
91 | set_pnfs_layoutdriver(struct nfs_server *server, u32 id) | |
92 | { | |
93 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
94 | ||
95 | if (id == 0) | |
96 | goto out_no_driver; | |
97 | if (!(server->nfs_client->cl_exchange_flags & | |
98 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
99 | printk(KERN_ERR "%s: id %u cl_exchange_flags 0x%x\n", __func__, | |
100 | id, server->nfs_client->cl_exchange_flags); | |
101 | goto out_no_driver; | |
102 | } | |
103 | ld_type = find_pnfs_driver(id); | |
104 | if (!ld_type) { | |
105 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
106 | ld_type = find_pnfs_driver(id); | |
107 | if (!ld_type) { | |
108 | dprintk("%s: No pNFS module found for %u.\n", | |
109 | __func__, id); | |
110 | goto out_no_driver; | |
111 | } | |
112 | } | |
02c35fca FI |
113 | if (!try_module_get(ld_type->owner)) { |
114 | dprintk("%s: Could not grab reference on module\n", __func__); | |
115 | goto out_no_driver; | |
116 | } | |
85e174ba | 117 | server->pnfs_curr_ld = ld_type; |
ea8eecdd | 118 | |
85e174ba RL |
119 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
120 | return; | |
121 | ||
122 | out_no_driver: | |
123 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
124 | server->pnfs_curr_ld = NULL; | |
125 | } | |
02c35fca FI |
126 | |
127 | int | |
128 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
129 | { | |
130 | int status = -EINVAL; | |
131 | struct pnfs_layoutdriver_type *tmp; | |
132 | ||
133 | if (ld_type->id == 0) { | |
134 | printk(KERN_ERR "%s id 0 is reserved\n", __func__); | |
135 | return status; | |
136 | } | |
b1f69b75 AA |
137 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
138 | printk(KERN_ERR "%s Layout driver must provide " | |
139 | "alloc_lseg and free_lseg.\n", __func__); | |
140 | return status; | |
141 | } | |
02c35fca FI |
142 | |
143 | spin_lock(&pnfs_spinlock); | |
144 | tmp = find_pnfs_driver_locked(ld_type->id); | |
145 | if (!tmp) { | |
146 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
147 | status = 0; | |
148 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
149 | ld_type->name); | |
150 | } else { | |
151 | printk(KERN_ERR "%s Module with id %d already loaded!\n", | |
152 | __func__, ld_type->id); | |
153 | } | |
154 | spin_unlock(&pnfs_spinlock); | |
155 | ||
156 | return status; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
159 | ||
160 | void | |
161 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
162 | { | |
163 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
164 | spin_lock(&pnfs_spinlock); | |
165 | list_del(&ld_type->pnfs_tblid); | |
166 | spin_unlock(&pnfs_spinlock); | |
167 | } | |
168 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 169 | |
b1f69b75 AA |
170 | /* |
171 | * pNFS client layout cache | |
172 | */ | |
173 | ||
cc6e5340 | 174 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 175 | void |
cc6e5340 | 176 | get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 177 | { |
cc6e5340 | 178 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
179 | } |
180 | ||
636fb9c8 BH |
181 | static struct pnfs_layout_hdr * |
182 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
183 | { | |
184 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
185 | return ld->alloc_layout_hdr ? ld->alloc_layout_hdr(ino, gfp_flags) : | |
186 | kzalloc(sizeof(struct pnfs_layout_hdr), gfp_flags); | |
187 | } | |
188 | ||
189 | static void | |
190 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
191 | { | |
192 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(lo->plh_inode)->pnfs_curr_ld; | |
193 | return ld->alloc_layout_hdr ? ld->free_layout_hdr(lo) : kfree(lo); | |
194 | } | |
195 | ||
e5e94017 | 196 | static void |
cc6e5340 | 197 | destroy_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 198 | { |
cc6e5340 FI |
199 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
200 | BUG_ON(!list_empty(&lo->plh_layouts)); | |
201 | NFS_I(lo->plh_inode)->layout = NULL; | |
636fb9c8 | 202 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 203 | } |
e5e94017 | 204 | |
cc6e5340 FI |
205 | static void |
206 | put_layout_hdr_locked(struct pnfs_layout_hdr *lo) | |
207 | { | |
208 | if (atomic_dec_and_test(&lo->plh_refcount)) | |
209 | destroy_layout_hdr(lo); | |
e5e94017 BH |
210 | } |
211 | ||
b1f69b75 | 212 | void |
cc6e5340 | 213 | put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 214 | { |
cc6e5340 FI |
215 | struct inode *inode = lo->plh_inode; |
216 | ||
217 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { | |
218 | destroy_layout_hdr(lo); | |
219 | spin_unlock(&inode->i_lock); | |
220 | } | |
974cec8c AA |
221 | } |
222 | ||
223 | static void | |
224 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
225 | { | |
566052c5 | 226 | INIT_LIST_HEAD(&lseg->pls_list); |
4541d16c FI |
227 | atomic_set(&lseg->pls_refcount, 1); |
228 | smp_mb(); | |
229 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 230 | lseg->pls_layout = lo; |
974cec8c AA |
231 | } |
232 | ||
4541d16c | 233 | static void free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 234 | { |
b7edfaa1 | 235 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 236 | |
b1f69b75 | 237 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
52fabd73 | 238 | /* Matched by get_layout_hdr in pnfs_insert_layout */ |
cc6e5340 | 239 | put_layout_hdr(NFS_I(ino)->layout); |
974cec8c AA |
240 | } |
241 | ||
d684d2ae FI |
242 | static void |
243 | put_lseg_common(struct pnfs_layout_segment *lseg) | |
244 | { | |
245 | struct inode *inode = lseg->pls_layout->plh_inode; | |
246 | ||
d20581aa | 247 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae FI |
248 | list_del_init(&lseg->pls_list); |
249 | if (list_empty(&lseg->pls_layout->plh_segs)) { | |
250 | set_bit(NFS_LAYOUT_DESTROYED, &lseg->pls_layout->plh_flags); | |
251 | /* Matched by initial refcount set in alloc_init_layout_hdr */ | |
252 | put_layout_hdr_locked(lseg->pls_layout); | |
253 | } | |
254 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); | |
255 | } | |
256 | ||
bae724ef | 257 | void |
d684d2ae | 258 | put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 259 | { |
d684d2ae FI |
260 | struct inode *inode; |
261 | ||
262 | if (!lseg) | |
263 | return; | |
264 | ||
4541d16c FI |
265 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
266 | atomic_read(&lseg->pls_refcount), | |
267 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
d684d2ae FI |
268 | inode = lseg->pls_layout->plh_inode; |
269 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { | |
270 | LIST_HEAD(free_me); | |
4541d16c | 271 | |
d684d2ae FI |
272 | put_lseg_common(lseg); |
273 | list_add(&lseg->pls_list, &free_me); | |
274 | spin_unlock(&inode->i_lock); | |
275 | pnfs_free_lseg_list(&free_me); | |
4541d16c | 276 | } |
4541d16c | 277 | } |
e0c2b380 | 278 | EXPORT_SYMBOL_GPL(put_lseg); |
974cec8c | 279 | |
fb3296eb BH |
280 | static inline u64 |
281 | end_offset(u64 start, u64 len) | |
282 | { | |
283 | u64 end; | |
284 | ||
285 | end = start + len; | |
286 | return end >= start ? end : NFS4_MAX_UINT64; | |
287 | } | |
288 | ||
289 | /* last octet in a range */ | |
290 | static inline u64 | |
291 | last_byte_offset(u64 start, u64 len) | |
292 | { | |
293 | u64 end; | |
294 | ||
295 | BUG_ON(!len); | |
296 | end = start + len; | |
297 | return end > start ? end - 1 : NFS4_MAX_UINT64; | |
298 | } | |
299 | ||
300 | /* | |
301 | * is l2 fully contained in l1? | |
302 | * start1 end1 | |
303 | * [----------------------------------) | |
304 | * start2 end2 | |
305 | * [----------------) | |
306 | */ | |
307 | static inline int | |
308 | lo_seg_contained(struct pnfs_layout_range *l1, | |
309 | struct pnfs_layout_range *l2) | |
310 | { | |
311 | u64 start1 = l1->offset; | |
312 | u64 end1 = end_offset(start1, l1->length); | |
313 | u64 start2 = l2->offset; | |
314 | u64 end2 = end_offset(start2, l2->length); | |
315 | ||
316 | return (start1 <= start2) && (end1 >= end2); | |
317 | } | |
318 | ||
319 | /* | |
320 | * is l1 and l2 intersecting? | |
321 | * start1 end1 | |
322 | * [----------------------------------) | |
323 | * start2 end2 | |
324 | * [----------------) | |
325 | */ | |
326 | static inline int | |
327 | lo_seg_intersecting(struct pnfs_layout_range *l1, | |
328 | struct pnfs_layout_range *l2) | |
329 | { | |
330 | u64 start1 = l1->offset; | |
331 | u64 end1 = end_offset(start1, l1->length); | |
332 | u64 start2 = l2->offset; | |
333 | u64 end2 = end_offset(start2, l2->length); | |
334 | ||
335 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
336 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
337 | } | |
338 | ||
4541d16c | 339 | static bool |
778b5502 BH |
340 | should_free_lseg(struct pnfs_layout_range *lseg_range, |
341 | struct pnfs_layout_range *recall_range) | |
4541d16c | 342 | { |
778b5502 BH |
343 | return (recall_range->iomode == IOMODE_ANY || |
344 | lseg_range->iomode == recall_range->iomode) && | |
345 | lo_seg_intersecting(lseg_range, recall_range); | |
974cec8c AA |
346 | } |
347 | ||
4541d16c FI |
348 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
349 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
350 | struct list_head *tmp_list) | |
351 | { | |
352 | int rv = 0; | |
353 | ||
354 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
355 | /* Remove the reference keeping the lseg in the | |
356 | * list. It will now be removed when all | |
357 | * outstanding io is finished. | |
358 | */ | |
d684d2ae FI |
359 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
360 | atomic_read(&lseg->pls_refcount)); | |
361 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
362 | put_lseg_common(lseg); | |
363 | list_add(&lseg->pls_list, tmp_list); | |
364 | rv = 1; | |
365 | } | |
4541d16c FI |
366 | } |
367 | return rv; | |
368 | } | |
369 | ||
370 | /* Returns count of number of matching invalid lsegs remaining in list | |
371 | * after call. | |
372 | */ | |
43f1b3da | 373 | int |
4541d16c FI |
374 | mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
375 | struct list_head *tmp_list, | |
778b5502 | 376 | struct pnfs_layout_range *recall_range) |
974cec8c AA |
377 | { |
378 | struct pnfs_layout_segment *lseg, *next; | |
4541d16c | 379 | int invalid = 0, removed = 0; |
974cec8c AA |
380 | |
381 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
382 | ||
38511722 FI |
383 | if (list_empty(&lo->plh_segs)) { |
384 | if (!test_and_set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags)) | |
385 | put_layout_hdr_locked(lo); | |
386 | return 0; | |
387 | } | |
4541d16c | 388 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
389 | if (!recall_range || |
390 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
391 | dprintk("%s: freeing lseg %p iomode %d " |
392 | "offset %llu length %llu\n", __func__, | |
393 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
394 | lseg->pls_range.length); | |
395 | invalid++; | |
396 | removed += mark_lseg_invalid(lseg, tmp_list); | |
397 | } | |
398 | dprintk("%s:Return %i\n", __func__, invalid - removed); | |
399 | return invalid - removed; | |
974cec8c AA |
400 | } |
401 | ||
f49f9baa | 402 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 403 | void |
4541d16c | 404 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 405 | { |
4541d16c | 406 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
407 | struct pnfs_layout_hdr *lo; |
408 | ||
409 | if (list_empty(free_me)) | |
410 | return; | |
411 | ||
412 | lo = list_first_entry(free_me, struct pnfs_layout_segment, | |
413 | pls_list)->pls_layout; | |
974cec8c | 414 | |
f49f9baa FI |
415 | if (test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags)) { |
416 | struct nfs_client *clp; | |
417 | ||
418 | clp = NFS_SERVER(lo->plh_inode)->nfs_client; | |
419 | spin_lock(&clp->cl_lock); | |
420 | list_del_init(&lo->plh_layouts); | |
421 | spin_unlock(&clp->cl_lock); | |
422 | } | |
4541d16c | 423 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 424 | list_del(&lseg->pls_list); |
4541d16c | 425 | free_lseg(lseg); |
974cec8c AA |
426 | } |
427 | } | |
428 | ||
e5e94017 BH |
429 | void |
430 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
431 | { | |
432 | struct pnfs_layout_hdr *lo; | |
974cec8c | 433 | LIST_HEAD(tmp_list); |
e5e94017 BH |
434 | |
435 | spin_lock(&nfsi->vfs_inode.i_lock); | |
436 | lo = nfsi->layout; | |
437 | if (lo) { | |
38511722 | 438 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
778b5502 | 439 | mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
e5e94017 BH |
440 | } |
441 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c AA |
442 | pnfs_free_lseg_list(&tmp_list); |
443 | } | |
444 | ||
445 | /* | |
446 | * Called by the state manger to remove all layouts established under an | |
447 | * expired lease. | |
448 | */ | |
449 | void | |
450 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
451 | { | |
6382a441 | 452 | struct nfs_server *server; |
974cec8c AA |
453 | struct pnfs_layout_hdr *lo; |
454 | LIST_HEAD(tmp_list); | |
455 | ||
c47abcf8 AA |
456 | nfs4_deviceid_mark_client_invalid(clp); |
457 | nfs4_deviceid_purge_client(clp); | |
458 | ||
974cec8c | 459 | spin_lock(&clp->cl_lock); |
6382a441 WAA |
460 | rcu_read_lock(); |
461 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
462 | if (!list_empty(&server->layouts)) | |
463 | list_splice_init(&server->layouts, &tmp_list); | |
464 | } | |
465 | rcu_read_unlock(); | |
974cec8c AA |
466 | spin_unlock(&clp->cl_lock); |
467 | ||
468 | while (!list_empty(&tmp_list)) { | |
469 | lo = list_entry(tmp_list.next, struct pnfs_layout_hdr, | |
b7edfaa1 | 470 | plh_layouts); |
974cec8c | 471 | dprintk("%s freeing layout for inode %lu\n", __func__, |
b7edfaa1 | 472 | lo->plh_inode->i_ino); |
2887fe45 | 473 | list_del_init(&lo->plh_layouts); |
b7edfaa1 | 474 | pnfs_destroy_layout(NFS_I(lo->plh_inode)); |
974cec8c | 475 | } |
e5e94017 BH |
476 | } |
477 | ||
fd6002e9 | 478 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
479 | void |
480 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
481 | bool update_barrier) | |
b1f69b75 | 482 | { |
fd6002e9 | 483 | u32 oldseq, newseq; |
b1f69b75 | 484 | |
fd6002e9 FI |
485 | oldseq = be32_to_cpu(lo->plh_stateid.stateid.seqid); |
486 | newseq = be32_to_cpu(new->stateid.seqid); | |
43f1b3da | 487 | if ((int)(newseq - oldseq) > 0) { |
fd6002e9 | 488 | memcpy(&lo->plh_stateid, &new->stateid, sizeof(new->stateid)); |
43f1b3da FI |
489 | if (update_barrier) { |
490 | u32 new_barrier = be32_to_cpu(new->stateid.seqid); | |
491 | ||
492 | if ((int)(new_barrier - lo->plh_barrier)) | |
493 | lo->plh_barrier = new_barrier; | |
494 | } else { | |
495 | /* Because of wraparound, we want to keep the barrier | |
496 | * "close" to the current seqids. It needs to be | |
497 | * within 2**31 to count as "behind", so if it | |
498 | * gets too near that limit, give us a litle leeway | |
499 | * and bring it to within 2**30. | |
500 | * NOTE - and yes, this is all unsigned arithmetic. | |
501 | */ | |
502 | if (unlikely((newseq - lo->plh_barrier) > (3 << 29))) | |
503 | lo->plh_barrier = newseq - (1 << 30); | |
504 | } | |
505 | } | |
b1f69b75 AA |
506 | } |
507 | ||
cf7d63f1 FI |
508 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
509 | static bool | |
43f1b3da FI |
510 | pnfs_layoutgets_blocked(struct pnfs_layout_hdr *lo, nfs4_stateid *stateid, |
511 | int lget) | |
512 | { | |
513 | if ((stateid) && | |
514 | (int)(lo->plh_barrier - be32_to_cpu(stateid->stateid.seqid)) >= 0) | |
515 | return true; | |
f7e8917a | 516 | return lo->plh_block_lgets || |
38511722 | 517 | test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags) || |
f7e8917a | 518 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || |
43f1b3da | 519 | (list_empty(&lo->plh_segs) && |
cf7d63f1 FI |
520 | (atomic_read(&lo->plh_outstanding) > lget)); |
521 | } | |
522 | ||
fd6002e9 FI |
523 | int |
524 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
525 | struct nfs4_state *open_state) | |
b1f69b75 | 526 | { |
fd6002e9 | 527 | int status = 0; |
974cec8c | 528 | |
b1f69b75 | 529 | dprintk("--> %s\n", __func__); |
fd6002e9 | 530 | spin_lock(&lo->plh_inode->i_lock); |
43f1b3da | 531 | if (pnfs_layoutgets_blocked(lo, NULL, 1)) { |
cf7d63f1 FI |
532 | status = -EAGAIN; |
533 | } else if (list_empty(&lo->plh_segs)) { | |
fd6002e9 FI |
534 | int seq; |
535 | ||
536 | do { | |
537 | seq = read_seqbegin(&open_state->seqlock); | |
538 | memcpy(dst->data, open_state->stateid.data, | |
539 | sizeof(open_state->stateid.data)); | |
540 | } while (read_seqretry(&open_state->seqlock, seq)); | |
541 | } else | |
542 | memcpy(dst->data, lo->plh_stateid.data, sizeof(lo->plh_stateid.data)); | |
543 | spin_unlock(&lo->plh_inode->i_lock); | |
b1f69b75 | 544 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 545 | return status; |
b1f69b75 AA |
546 | } |
547 | ||
548 | /* | |
549 | * Get layout from server. | |
550 | * for now, assume that whole file layouts are requested. | |
551 | * arg->offset: 0 | |
552 | * arg->length: all ones | |
553 | */ | |
e5e94017 BH |
554 | static struct pnfs_layout_segment * |
555 | send_layoutget(struct pnfs_layout_hdr *lo, | |
556 | struct nfs_open_context *ctx, | |
fb3296eb | 557 | struct pnfs_layout_range *range, |
a75b9df9 | 558 | gfp_t gfp_flags) |
e5e94017 | 559 | { |
b7edfaa1 | 560 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
561 | struct nfs_server *server = NFS_SERVER(ino); |
562 | struct nfs4_layoutget *lgp; | |
563 | struct pnfs_layout_segment *lseg = NULL; | |
35124a09 WAA |
564 | struct page **pages = NULL; |
565 | int i; | |
566 | u32 max_resp_sz, max_pages; | |
b1f69b75 AA |
567 | |
568 | dprintk("--> %s\n", __func__); | |
e5e94017 | 569 | |
b1f69b75 | 570 | BUG_ON(ctx == NULL); |
a75b9df9 | 571 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
cf7d63f1 | 572 | if (lgp == NULL) |
b1f69b75 | 573 | return NULL; |
35124a09 WAA |
574 | |
575 | /* allocate pages for xdr post processing */ | |
576 | max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; | |
577 | max_pages = max_resp_sz >> PAGE_SHIFT; | |
578 | ||
a75b9df9 | 579 | pages = kzalloc(max_pages * sizeof(struct page *), gfp_flags); |
35124a09 WAA |
580 | if (!pages) |
581 | goto out_err_free; | |
582 | ||
583 | for (i = 0; i < max_pages; i++) { | |
a75b9df9 | 584 | pages[i] = alloc_page(gfp_flags); |
35124a09 WAA |
585 | if (!pages[i]) |
586 | goto out_err_free; | |
587 | } | |
588 | ||
fb3296eb BH |
589 | lgp->args.minlength = PAGE_CACHE_SIZE; |
590 | if (lgp->args.minlength > range->length) | |
591 | lgp->args.minlength = range->length; | |
b1f69b75 | 592 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
fb3296eb | 593 | lgp->args.range = *range; |
b1f69b75 AA |
594 | lgp->args.type = server->pnfs_curr_ld->id; |
595 | lgp->args.inode = ino; | |
596 | lgp->args.ctx = get_nfs_open_context(ctx); | |
35124a09 WAA |
597 | lgp->args.layout.pages = pages; |
598 | lgp->args.layout.pglen = max_pages * PAGE_SIZE; | |
b1f69b75 | 599 | lgp->lsegpp = &lseg; |
a75b9df9 | 600 | lgp->gfp_flags = gfp_flags; |
b1f69b75 AA |
601 | |
602 | /* Synchronously retrieve layout information from server and | |
603 | * store in lseg. | |
604 | */ | |
605 | nfs4_proc_layoutget(lgp); | |
974cec8c | 606 | if (!lseg) { |
b1f69b75 | 607 | /* remember that LAYOUTGET failed and suspend trying */ |
fb3296eb | 608 | set_bit(lo_fail_bit(range->iomode), &lo->plh_flags); |
974cec8c | 609 | } |
35124a09 WAA |
610 | |
611 | /* free xdr pages */ | |
612 | for (i = 0; i < max_pages; i++) | |
613 | __free_page(pages[i]); | |
614 | kfree(pages); | |
615 | ||
974cec8c | 616 | return lseg; |
35124a09 WAA |
617 | |
618 | out_err_free: | |
619 | /* free any allocated xdr pages, lgp as it's not used */ | |
620 | if (pages) { | |
621 | for (i = 0; i < max_pages; i++) { | |
622 | if (!pages[i]) | |
623 | break; | |
624 | __free_page(pages[i]); | |
625 | } | |
626 | kfree(pages); | |
627 | } | |
628 | kfree(lgp); | |
629 | return NULL; | |
974cec8c AA |
630 | } |
631 | ||
cbe82603 BH |
632 | /* Initiates a LAYOUTRETURN(FILE) */ |
633 | int | |
634 | _pnfs_return_layout(struct inode *ino) | |
635 | { | |
636 | struct pnfs_layout_hdr *lo = NULL; | |
637 | struct nfs_inode *nfsi = NFS_I(ino); | |
638 | LIST_HEAD(tmp_list); | |
639 | struct nfs4_layoutreturn *lrp; | |
640 | nfs4_stateid stateid; | |
641 | int status = 0; | |
642 | ||
643 | dprintk("--> %s\n", __func__); | |
644 | ||
645 | spin_lock(&ino->i_lock); | |
646 | lo = nfsi->layout; | |
a2e1d4f2 | 647 | if (!lo) { |
cbe82603 | 648 | spin_unlock(&ino->i_lock); |
a2e1d4f2 FI |
649 | dprintk("%s: no layout to return\n", __func__); |
650 | return status; | |
cbe82603 BH |
651 | } |
652 | stateid = nfsi->layout->plh_stateid; | |
653 | /* Reference matched in nfs4_layoutreturn_release */ | |
654 | get_layout_hdr(lo); | |
ea0ded74 FI |
655 | mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
656 | lo->plh_block_lgets++; | |
cbe82603 BH |
657 | spin_unlock(&ino->i_lock); |
658 | pnfs_free_lseg_list(&tmp_list); | |
659 | ||
660 | WARN_ON(test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)); | |
661 | ||
662 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); | |
663 | if (unlikely(lrp == NULL)) { | |
664 | status = -ENOMEM; | |
9e2dfdb3 FI |
665 | set_bit(NFS_LAYOUT_RW_FAILED, &lo->plh_flags); |
666 | set_bit(NFS_LAYOUT_RO_FAILED, &lo->plh_flags); | |
1ed3a853 | 667 | put_layout_hdr(lo); |
cbe82603 BH |
668 | goto out; |
669 | } | |
670 | ||
671 | lrp->args.stateid = stateid; | |
672 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; | |
673 | lrp->args.inode = ino; | |
a56aaa02 | 674 | lrp->args.layout = lo; |
cbe82603 BH |
675 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
676 | ||
677 | status = nfs4_proc_layoutreturn(lrp); | |
678 | out: | |
679 | dprintk("<-- %s status: %d\n", __func__, status); | |
680 | return status; | |
681 | } | |
682 | ||
f7e8917a FI |
683 | bool pnfs_roc(struct inode *ino) |
684 | { | |
685 | struct pnfs_layout_hdr *lo; | |
686 | struct pnfs_layout_segment *lseg, *tmp; | |
687 | LIST_HEAD(tmp_list); | |
688 | bool found = false; | |
689 | ||
690 | spin_lock(&ino->i_lock); | |
691 | lo = NFS_I(ino)->layout; | |
692 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || | |
693 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) | |
694 | goto out_nolayout; | |
695 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) | |
696 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
697 | mark_lseg_invalid(lseg, &tmp_list); | |
698 | found = true; | |
699 | } | |
700 | if (!found) | |
701 | goto out_nolayout; | |
702 | lo->plh_block_lgets++; | |
703 | get_layout_hdr(lo); /* matched in pnfs_roc_release */ | |
704 | spin_unlock(&ino->i_lock); | |
705 | pnfs_free_lseg_list(&tmp_list); | |
706 | return true; | |
707 | ||
708 | out_nolayout: | |
709 | spin_unlock(&ino->i_lock); | |
710 | return false; | |
711 | } | |
712 | ||
713 | void pnfs_roc_release(struct inode *ino) | |
714 | { | |
715 | struct pnfs_layout_hdr *lo; | |
716 | ||
717 | spin_lock(&ino->i_lock); | |
718 | lo = NFS_I(ino)->layout; | |
719 | lo->plh_block_lgets--; | |
720 | put_layout_hdr_locked(lo); | |
721 | spin_unlock(&ino->i_lock); | |
722 | } | |
723 | ||
724 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
725 | { | |
726 | struct pnfs_layout_hdr *lo; | |
727 | ||
728 | spin_lock(&ino->i_lock); | |
729 | lo = NFS_I(ino)->layout; | |
730 | if ((int)(barrier - lo->plh_barrier) > 0) | |
731 | lo->plh_barrier = barrier; | |
732 | spin_unlock(&ino->i_lock); | |
733 | } | |
734 | ||
735 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier) | |
736 | { | |
737 | struct nfs_inode *nfsi = NFS_I(ino); | |
738 | struct pnfs_layout_segment *lseg; | |
739 | bool found = false; | |
740 | ||
741 | spin_lock(&ino->i_lock); | |
742 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) | |
743 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
744 | found = true; | |
745 | break; | |
746 | } | |
747 | if (!found) { | |
748 | struct pnfs_layout_hdr *lo = nfsi->layout; | |
749 | u32 current_seqid = be32_to_cpu(lo->plh_stateid.stateid.seqid); | |
750 | ||
751 | /* Since close does not return a layout stateid for use as | |
752 | * a barrier, we choose the worst-case barrier. | |
753 | */ | |
754 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
755 | } | |
756 | spin_unlock(&ino->i_lock); | |
757 | return found; | |
758 | } | |
759 | ||
b1f69b75 AA |
760 | /* |
761 | * Compare two layout segments for sorting into layout cache. | |
762 | * We want to preferentially return RW over RO layouts, so ensure those | |
763 | * are seen first. | |
764 | */ | |
765 | static s64 | |
fb3296eb BH |
766 | cmp_layout(struct pnfs_layout_range *l1, |
767 | struct pnfs_layout_range *l2) | |
b1f69b75 | 768 | { |
fb3296eb BH |
769 | s64 d; |
770 | ||
771 | /* high offset > low offset */ | |
772 | d = l1->offset - l2->offset; | |
773 | if (d) | |
774 | return d; | |
775 | ||
776 | /* short length > long length */ | |
777 | d = l2->length - l1->length; | |
778 | if (d) | |
779 | return d; | |
780 | ||
b1f69b75 | 781 | /* read > read/write */ |
fb3296eb | 782 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
783 | } |
784 | ||
974cec8c AA |
785 | static void |
786 | pnfs_insert_layout(struct pnfs_layout_hdr *lo, | |
787 | struct pnfs_layout_segment *lseg) | |
788 | { | |
b1f69b75 | 789 | struct pnfs_layout_segment *lp; |
b1f69b75 | 790 | |
974cec8c AA |
791 | dprintk("%s:Begin\n", __func__); |
792 | ||
b7edfaa1 | 793 | assert_spin_locked(&lo->plh_inode->i_lock); |
b7edfaa1 | 794 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
fb3296eb | 795 | if (cmp_layout(&lseg->pls_range, &lp->pls_range) > 0) |
b1f69b75 | 796 | continue; |
566052c5 | 797 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
798 | dprintk("%s: inserted lseg %p " |
799 | "iomode %d offset %llu length %llu before " | |
800 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
801 | __func__, lseg, lseg->pls_range.iomode, |
802 | lseg->pls_range.offset, lseg->pls_range.length, | |
803 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
804 | lp->pls_range.length); | |
fb3296eb | 805 | goto out; |
974cec8c | 806 | } |
fb3296eb BH |
807 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
808 | dprintk("%s: inserted lseg %p " | |
809 | "iomode %d offset %llu length %llu at tail\n", | |
810 | __func__, lseg, lseg->pls_range.iomode, | |
811 | lseg->pls_range.offset, lseg->pls_range.length); | |
812 | out: | |
cc6e5340 | 813 | get_layout_hdr(lo); |
974cec8c AA |
814 | |
815 | dprintk("%s:Return\n", __func__); | |
e5e94017 BH |
816 | } |
817 | ||
818 | static struct pnfs_layout_hdr * | |
a75b9df9 | 819 | alloc_init_layout_hdr(struct inode *ino, gfp_t gfp_flags) |
e5e94017 BH |
820 | { |
821 | struct pnfs_layout_hdr *lo; | |
822 | ||
636fb9c8 | 823 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
824 | if (!lo) |
825 | return NULL; | |
cc6e5340 | 826 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
827 | INIT_LIST_HEAD(&lo->plh_layouts); |
828 | INIT_LIST_HEAD(&lo->plh_segs); | |
43f1b3da | 829 | INIT_LIST_HEAD(&lo->plh_bulk_recall); |
b7edfaa1 | 830 | lo->plh_inode = ino; |
e5e94017 BH |
831 | return lo; |
832 | } | |
833 | ||
834 | static struct pnfs_layout_hdr * | |
a75b9df9 | 835 | pnfs_find_alloc_layout(struct inode *ino, gfp_t gfp_flags) |
e5e94017 BH |
836 | { |
837 | struct nfs_inode *nfsi = NFS_I(ino); | |
838 | struct pnfs_layout_hdr *new = NULL; | |
839 | ||
840 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
841 | ||
842 | assert_spin_locked(&ino->i_lock); | |
4541d16c FI |
843 | if (nfsi->layout) { |
844 | if (test_bit(NFS_LAYOUT_DESTROYED, &nfsi->layout->plh_flags)) | |
845 | return NULL; | |
846 | else | |
847 | return nfsi->layout; | |
848 | } | |
e5e94017 | 849 | spin_unlock(&ino->i_lock); |
a75b9df9 | 850 | new = alloc_init_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
851 | spin_lock(&ino->i_lock); |
852 | ||
853 | if (likely(nfsi->layout == NULL)) /* Won the race? */ | |
854 | nfsi->layout = new; | |
855 | else | |
636fb9c8 | 856 | pnfs_free_layout_hdr(new); |
e5e94017 BH |
857 | return nfsi->layout; |
858 | } | |
859 | ||
b1f69b75 AA |
860 | /* |
861 | * iomode matching rules: | |
862 | * iomode lseg match | |
863 | * ----- ----- ----- | |
864 | * ANY READ true | |
865 | * ANY RW true | |
866 | * RW READ false | |
867 | * RW RW true | |
868 | * READ READ true | |
869 | * READ RW true | |
870 | */ | |
871 | static int | |
fb3296eb BH |
872 | is_matching_lseg(struct pnfs_layout_range *ls_range, |
873 | struct pnfs_layout_range *range) | |
b1f69b75 | 874 | { |
fb3296eb BH |
875 | struct pnfs_layout_range range1; |
876 | ||
877 | if ((range->iomode == IOMODE_RW && | |
878 | ls_range->iomode != IOMODE_RW) || | |
879 | !lo_seg_intersecting(ls_range, range)) | |
880 | return 0; | |
881 | ||
882 | /* range1 covers only the first byte in the range */ | |
883 | range1 = *range; | |
884 | range1.length = 1; | |
885 | return lo_seg_contained(ls_range, &range1); | |
b1f69b75 AA |
886 | } |
887 | ||
888 | /* | |
889 | * lookup range in layout | |
890 | */ | |
e5e94017 | 891 | static struct pnfs_layout_segment * |
fb3296eb BH |
892 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
893 | struct pnfs_layout_range *range) | |
e5e94017 | 894 | { |
b1f69b75 AA |
895 | struct pnfs_layout_segment *lseg, *ret = NULL; |
896 | ||
897 | dprintk("%s:Begin\n", __func__); | |
898 | ||
b7edfaa1 FI |
899 | assert_spin_locked(&lo->plh_inode->i_lock); |
900 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { | |
4541d16c | 901 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
fb3296eb | 902 | is_matching_lseg(&lseg->pls_range, range)) { |
d684d2ae | 903 | ret = get_lseg(lseg); |
b1f69b75 AA |
904 | break; |
905 | } | |
d771e3a4 | 906 | if (lseg->pls_range.offset > range->offset) |
b1f69b75 AA |
907 | break; |
908 | } | |
909 | ||
910 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 911 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 912 | return ret; |
e5e94017 BH |
913 | } |
914 | ||
915 | /* | |
916 | * Layout segment is retreived from the server if not cached. | |
917 | * The appropriate layout segment is referenced and returned to the caller. | |
918 | */ | |
7c24d948 | 919 | struct pnfs_layout_segment * |
e5e94017 BH |
920 | pnfs_update_layout(struct inode *ino, |
921 | struct nfs_open_context *ctx, | |
fb3296eb BH |
922 | loff_t pos, |
923 | u64 count, | |
a75b9df9 TM |
924 | enum pnfs_iomode iomode, |
925 | gfp_t gfp_flags) | |
e5e94017 | 926 | { |
fb3296eb BH |
927 | struct pnfs_layout_range arg = { |
928 | .iomode = iomode, | |
929 | .offset = pos, | |
930 | .length = count, | |
931 | }; | |
707ed5fd | 932 | unsigned pg_offset; |
e5e94017 | 933 | struct nfs_inode *nfsi = NFS_I(ino); |
6382a441 WAA |
934 | struct nfs_server *server = NFS_SERVER(ino); |
935 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
936 | struct pnfs_layout_hdr *lo; |
937 | struct pnfs_layout_segment *lseg = NULL; | |
f49f9baa | 938 | bool first = false; |
e5e94017 BH |
939 | |
940 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) | |
941 | return NULL; | |
942 | spin_lock(&ino->i_lock); | |
a75b9df9 | 943 | lo = pnfs_find_alloc_layout(ino, gfp_flags); |
e5e94017 BH |
944 | if (lo == NULL) { |
945 | dprintk("%s ERROR: can't get pnfs_layout_hdr\n", __func__); | |
946 | goto out_unlock; | |
947 | } | |
948 | ||
43f1b3da FI |
949 | /* Do we even need to bother with this? */ |
950 | if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) || | |
951 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { | |
952 | dprintk("%s matches recall, use MDS\n", __func__); | |
e5e94017 BH |
953 | goto out_unlock; |
954 | } | |
955 | ||
956 | /* if LAYOUTGET already failed once we don't try again */ | |
566052c5 | 957 | if (test_bit(lo_fail_bit(iomode), &nfsi->layout->plh_flags)) |
e5e94017 BH |
958 | goto out_unlock; |
959 | ||
568e8c49 | 960 | /* Check to see if the layout for the given range already exists */ |
fb3296eb | 961 | lseg = pnfs_find_lseg(lo, &arg); |
568e8c49 AA |
962 | if (lseg) |
963 | goto out_unlock; | |
964 | ||
43f1b3da | 965 | if (pnfs_layoutgets_blocked(lo, NULL, 0)) |
cf7d63f1 FI |
966 | goto out_unlock; |
967 | atomic_inc(&lo->plh_outstanding); | |
968 | ||
cc6e5340 | 969 | get_layout_hdr(lo); |
f49f9baa FI |
970 | if (list_empty(&lo->plh_segs)) |
971 | first = true; | |
972 | spin_unlock(&ino->i_lock); | |
973 | if (first) { | |
2130ff66 FI |
974 | /* The lo must be on the clp list if there is any |
975 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
976 | */ | |
977 | spin_lock(&clp->cl_lock); | |
978 | BUG_ON(!list_empty(&lo->plh_layouts)); | |
6382a441 | 979 | list_add_tail(&lo->plh_layouts, &server->layouts); |
2130ff66 FI |
980 | spin_unlock(&clp->cl_lock); |
981 | } | |
e5e94017 | 982 | |
707ed5fd BH |
983 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
984 | if (pg_offset) { | |
985 | arg.offset -= pg_offset; | |
986 | arg.length += pg_offset; | |
987 | } | |
7c24d948 AA |
988 | if (arg.length != NFS4_MAX_UINT64) |
989 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 990 | |
fb3296eb | 991 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
f49f9baa FI |
992 | if (!lseg && first) { |
993 | spin_lock(&clp->cl_lock); | |
994 | list_del_init(&lo->plh_layouts); | |
995 | spin_unlock(&clp->cl_lock); | |
2130ff66 | 996 | } |
cf7d63f1 | 997 | atomic_dec(&lo->plh_outstanding); |
cc6e5340 | 998 | put_layout_hdr(lo); |
e5e94017 BH |
999 | out: |
1000 | dprintk("%s end, state 0x%lx lseg %p\n", __func__, | |
bf9c1387 | 1001 | nfsi->layout ? nfsi->layout->plh_flags : -1, lseg); |
e5e94017 BH |
1002 | return lseg; |
1003 | out_unlock: | |
1004 | spin_unlock(&ino->i_lock); | |
1005 | goto out; | |
1006 | } | |
7c24d948 | 1007 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 AA |
1008 | |
1009 | int | |
1010 | pnfs_layout_process(struct nfs4_layoutget *lgp) | |
1011 | { | |
1012 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1013 | struct nfs4_layoutget_res *res = &lgp->res; | |
1014 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1015 | struct inode *ino = lo->plh_inode; |
43f1b3da | 1016 | struct nfs_client *clp = NFS_SERVER(ino)->nfs_client; |
b1f69b75 AA |
1017 | int status = 0; |
1018 | ||
1019 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1020 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1021 | if (!lseg || IS_ERR(lseg)) { |
1022 | if (!lseg) | |
1023 | status = -ENOMEM; | |
1024 | else | |
1025 | status = PTR_ERR(lseg); | |
1026 | dprintk("%s: Could not allocate layout: error %d\n", | |
1027 | __func__, status); | |
1028 | goto out; | |
1029 | } | |
1030 | ||
1031 | spin_lock(&ino->i_lock); | |
43f1b3da FI |
1032 | if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) || |
1033 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { | |
1034 | dprintk("%s forget reply due to recall\n", __func__); | |
1035 | goto out_forget_reply; | |
1036 | } | |
1037 | ||
1038 | if (pnfs_layoutgets_blocked(lo, &res->stateid, 1)) { | |
1039 | dprintk("%s forget reply due to state\n", __func__); | |
1040 | goto out_forget_reply; | |
1041 | } | |
b1f69b75 | 1042 | init_lseg(lo, lseg); |
566052c5 | 1043 | lseg->pls_range = res->range; |
d684d2ae | 1044 | *lgp->lsegpp = get_lseg(lseg); |
b1f69b75 AA |
1045 | pnfs_insert_layout(lo, lseg); |
1046 | ||
f7e8917a FI |
1047 | if (res->return_on_close) { |
1048 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
1049 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); | |
1050 | } | |
1051 | ||
b1f69b75 | 1052 | /* Done processing layoutget. Set the layout stateid */ |
43f1b3da | 1053 | pnfs_set_layout_stateid(lo, &res->stateid, false); |
b1f69b75 AA |
1054 | spin_unlock(&ino->i_lock); |
1055 | out: | |
1056 | return status; | |
43f1b3da FI |
1057 | |
1058 | out_forget_reply: | |
1059 | spin_unlock(&ino->i_lock); | |
1060 | lseg->pls_layout = lo; | |
1061 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1062 | goto out; | |
b1f69b75 AA |
1063 | } |
1064 | ||
d8007d4d TM |
1065 | void |
1066 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1067 | { | |
1068 | BUG_ON(pgio->pg_lseg != NULL); | |
1069 | ||
1070 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1071 | req->wb_context, | |
1072 | req_offset(req), | |
1073 | req->wb_bytes, | |
1074 | IOMODE_READ, | |
1075 | GFP_KERNEL); | |
e885de1a TM |
1076 | /* If no lseg, fall back to read through mds */ |
1077 | if (pgio->pg_lseg == NULL) | |
1078 | nfs_pageio_init_read_mds(pgio, pgio->pg_inode); | |
1079 | ||
d8007d4d TM |
1080 | } |
1081 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1082 | ||
1083 | void | |
1084 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1085 | { | |
1086 | BUG_ON(pgio->pg_lseg != NULL); | |
1087 | ||
1088 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1089 | req->wb_context, | |
1090 | req_offset(req), | |
1091 | req->wb_bytes, | |
1092 | IOMODE_RW, | |
1093 | GFP_NOFS); | |
e885de1a TM |
1094 | /* If no lseg, fall back to write through mds */ |
1095 | if (pgio->pg_lseg == NULL) | |
1096 | nfs_pageio_init_write_mds(pgio, pgio->pg_inode, pgio->pg_ioflags); | |
d8007d4d TM |
1097 | } |
1098 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1099 | ||
1751c363 TM |
1100 | bool |
1101 | pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode) | |
1102 | { | |
1103 | struct nfs_server *server = NFS_SERVER(inode); | |
1104 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
1105 | ||
1106 | if (ld == NULL) | |
1107 | return false; | |
1108 | nfs_pageio_init(pgio, inode, ld->pg_read_ops, server->rsize, 0); | |
1109 | return true; | |
1110 | } | |
1111 | ||
1112 | bool | |
1113 | pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags) | |
1114 | { | |
1115 | struct nfs_server *server = NFS_SERVER(inode); | |
1116 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
1117 | ||
1118 | if (ld == NULL) | |
1119 | return false; | |
1120 | nfs_pageio_init(pgio, inode, ld->pg_write_ops, server->wsize, ioflags); | |
1121 | return true; | |
1122 | } | |
1123 | ||
18ad0a9f | 1124 | bool |
dfed206b BH |
1125 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
1126 | struct nfs_page *req) | |
94ad1c80 | 1127 | { |
d8007d4d TM |
1128 | if (pgio->pg_lseg == NULL) |
1129 | return nfs_generic_pg_test(pgio, prev, req); | |
94ad1c80 | 1130 | |
19982ba8 TM |
1131 | /* |
1132 | * Test if a nfs_page is fully contained in the pnfs_layout_range. | |
1133 | * Note that this test makes several assumptions: | |
1134 | * - that the previous nfs_page in the struct nfs_pageio_descriptor | |
1135 | * is known to lie within the range. | |
1136 | * - that the nfs_page being tested is known to be contiguous with the | |
1137 | * previous nfs_page. | |
1138 | * - Layout ranges are page aligned, so we only have to test the | |
1139 | * start offset of the request. | |
1140 | * | |
1141 | * Please also note that 'end_offset' is actually the offset of the | |
1142 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1143 | * | |
1144 | */ | |
1145 | return req_offset(req) < end_offset(pgio->pg_lseg->pls_range.offset, | |
1146 | pgio->pg_lseg->pls_range.length); | |
94ad1c80 | 1147 | } |
89a58e32 | 1148 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1149 | |
d20581aa BH |
1150 | /* |
1151 | * Called by non rpc-based layout drivers | |
1152 | */ | |
1153 | int | |
1154 | pnfs_ld_write_done(struct nfs_write_data *data) | |
44b83799 | 1155 | { |
d20581aa | 1156 | int status; |
44b83799 | 1157 | |
d20581aa BH |
1158 | if (!data->pnfs_error) { |
1159 | pnfs_set_layoutcommit(data); | |
1160 | data->mds_ops->rpc_call_done(&data->task, data); | |
1161 | data->mds_ops->rpc_release(data); | |
1162 | return 0; | |
1163 | } | |
44b83799 | 1164 | |
d20581aa BH |
1165 | dprintk("%s: pnfs_error=%d, retry via MDS\n", __func__, |
1166 | data->pnfs_error); | |
1167 | status = nfs_initiate_write(data, NFS_CLIENT(data->inode), | |
1168 | data->mds_ops, NFS_FILE_SYNC); | |
1169 | return status ? : -EAGAIN; | |
44b83799 | 1170 | } |
d20581aa | 1171 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1172 | |
dce81290 TM |
1173 | static void |
1174 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
1175 | struct nfs_write_data *data) | |
1176 | { | |
1177 | list_splice_tail_init(&data->pages, &desc->pg_list); | |
1178 | if (data->req && list_empty(&data->req->wb_list)) | |
1179 | nfs_list_add_request(data->req, &desc->pg_list); | |
1180 | nfs_pageio_reset_write_mds(desc); | |
1181 | desc->pg_recoalesce = 1; | |
1182 | nfs_writedata_release(data); | |
1183 | } | |
1184 | ||
1185 | static enum pnfs_try_status | |
0382b744 | 1186 | pnfs_try_to_write_data(struct nfs_write_data *wdata, |
dce81290 TM |
1187 | const struct rpc_call_ops *call_ops, |
1188 | struct pnfs_layout_segment *lseg, | |
1189 | int how) | |
0382b744 AA |
1190 | { |
1191 | struct inode *inode = wdata->inode; | |
1192 | enum pnfs_try_status trypnfs; | |
1193 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1194 | ||
1195 | wdata->mds_ops = call_ops; | |
dce81290 | 1196 | wdata->lseg = get_lseg(lseg); |
0382b744 AA |
1197 | |
1198 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
1199 | inode->i_ino, wdata->args.count, wdata->args.offset, how); | |
1200 | ||
1201 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how); | |
1202 | if (trypnfs == PNFS_NOT_ATTEMPTED) { | |
1203 | put_lseg(wdata->lseg); | |
1204 | wdata->lseg = NULL; | |
1205 | } else | |
1206 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); | |
1207 | ||
1208 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); | |
1209 | return trypnfs; | |
1210 | } | |
1211 | ||
dce81290 TM |
1212 | static void |
1213 | pnfs_do_multiple_writes(struct nfs_pageio_descriptor *desc, struct list_head *head, int how) | |
1214 | { | |
1215 | struct nfs_write_data *data; | |
1216 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; | |
1217 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
1218 | ||
1219 | desc->pg_lseg = NULL; | |
1220 | while (!list_empty(head)) { | |
1221 | enum pnfs_try_status trypnfs; | |
1222 | ||
1223 | data = list_entry(head->next, struct nfs_write_data, list); | |
1224 | list_del_init(&data->list); | |
1225 | ||
1226 | trypnfs = pnfs_try_to_write_data(data, call_ops, lseg, how); | |
1227 | if (trypnfs == PNFS_NOT_ATTEMPTED) | |
1228 | pnfs_write_through_mds(desc, data); | |
1229 | } | |
1230 | put_lseg(lseg); | |
1231 | } | |
1232 | ||
1233 | int | |
1234 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
1235 | { | |
1236 | LIST_HEAD(head); | |
1237 | int ret; | |
1238 | ||
1239 | ret = nfs_generic_flush(desc, &head); | |
1240 | if (ret != 0) { | |
1241 | put_lseg(desc->pg_lseg); | |
1242 | desc->pg_lseg = NULL; | |
1243 | return ret; | |
1244 | } | |
1245 | pnfs_do_multiple_writes(desc, &head, desc->pg_ioflags); | |
1246 | return 0; | |
1247 | } | |
1248 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
1249 | ||
d20581aa BH |
1250 | /* |
1251 | * Called by non rpc-based layout drivers | |
1252 | */ | |
1253 | int | |
1254 | pnfs_ld_read_done(struct nfs_read_data *data) | |
1255 | { | |
1256 | int status; | |
1257 | ||
1258 | if (!data->pnfs_error) { | |
1259 | __nfs4_read_done_cb(data); | |
1260 | data->mds_ops->rpc_call_done(&data->task, data); | |
1261 | data->mds_ops->rpc_release(data); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | dprintk("%s: pnfs_error=%d, retry via MDS\n", __func__, | |
1266 | data->pnfs_error); | |
1267 | status = nfs_initiate_read(data, NFS_CLIENT(data->inode), | |
1268 | data->mds_ops); | |
1269 | return status ? : -EAGAIN; | |
1270 | } | |
1271 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
1272 | ||
493292dd TM |
1273 | static void |
1274 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
1275 | struct nfs_read_data *data) | |
1276 | { | |
1277 | list_splice_tail_init(&data->pages, &desc->pg_list); | |
1278 | if (data->req && list_empty(&data->req->wb_list)) | |
1279 | nfs_list_add_request(data->req, &desc->pg_list); | |
1280 | nfs_pageio_reset_read_mds(desc); | |
1281 | desc->pg_recoalesce = 1; | |
1282 | nfs_readdata_release(data); | |
1283 | } | |
1284 | ||
64419a9b AA |
1285 | /* |
1286 | * Call the appropriate parallel I/O subsystem read function. | |
1287 | */ | |
493292dd | 1288 | static enum pnfs_try_status |
64419a9b | 1289 | pnfs_try_to_read_data(struct nfs_read_data *rdata, |
493292dd TM |
1290 | const struct rpc_call_ops *call_ops, |
1291 | struct pnfs_layout_segment *lseg) | |
64419a9b AA |
1292 | { |
1293 | struct inode *inode = rdata->inode; | |
1294 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1295 | enum pnfs_try_status trypnfs; | |
1296 | ||
1297 | rdata->mds_ops = call_ops; | |
493292dd | 1298 | rdata->lseg = get_lseg(lseg); |
64419a9b AA |
1299 | |
1300 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
1301 | __func__, inode->i_ino, rdata->args.count, rdata->args.offset); | |
1302 | ||
1303 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata); | |
1304 | if (trypnfs == PNFS_NOT_ATTEMPTED) { | |
1305 | put_lseg(rdata->lseg); | |
1306 | rdata->lseg = NULL; | |
1307 | } else { | |
1308 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); | |
1309 | } | |
1310 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); | |
1311 | return trypnfs; | |
1312 | } | |
863a3c6c | 1313 | |
493292dd TM |
1314 | static void |
1315 | pnfs_do_multiple_reads(struct nfs_pageio_descriptor *desc, struct list_head *head) | |
1316 | { | |
1317 | struct nfs_read_data *data; | |
1318 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; | |
1319 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
1320 | ||
1321 | desc->pg_lseg = NULL; | |
1322 | while (!list_empty(head)) { | |
1323 | enum pnfs_try_status trypnfs; | |
1324 | ||
1325 | data = list_entry(head->next, struct nfs_read_data, list); | |
1326 | list_del_init(&data->list); | |
1327 | ||
1328 | trypnfs = pnfs_try_to_read_data(data, call_ops, lseg); | |
1329 | if (trypnfs == PNFS_NOT_ATTEMPTED) | |
1330 | pnfs_read_through_mds(desc, data); | |
1331 | } | |
1332 | put_lseg(lseg); | |
1333 | } | |
1334 | ||
1335 | int | |
1336 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
1337 | { | |
1338 | LIST_HEAD(head); | |
1339 | int ret; | |
1340 | ||
1341 | ret = nfs_generic_pagein(desc, &head); | |
1342 | if (ret != 0) { | |
1343 | put_lseg(desc->pg_lseg); | |
1344 | desc->pg_lseg = NULL; | |
1345 | return ret; | |
1346 | } | |
1347 | pnfs_do_multiple_reads(desc, &head); | |
1348 | return 0; | |
1349 | } | |
1350 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
1351 | ||
863a3c6c AA |
1352 | /* |
1353 | * Currently there is only one (whole file) write lseg. | |
1354 | */ | |
1355 | static struct pnfs_layout_segment *pnfs_list_write_lseg(struct inode *inode) | |
1356 | { | |
1357 | struct pnfs_layout_segment *lseg, *rv = NULL; | |
1358 | ||
1359 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) | |
1360 | if (lseg->pls_range.iomode == IOMODE_RW) | |
1361 | rv = lseg; | |
1362 | return rv; | |
1363 | } | |
1364 | ||
1365 | void | |
1366 | pnfs_set_layoutcommit(struct nfs_write_data *wdata) | |
1367 | { | |
1368 | struct nfs_inode *nfsi = NFS_I(wdata->inode); | |
4b8ee2b8 | 1369 | loff_t end_pos = wdata->mds_offset + wdata->res.count; |
79a48a1f | 1370 | bool mark_as_dirty = false; |
863a3c6c AA |
1371 | |
1372 | spin_lock(&nfsi->vfs_inode.i_lock); | |
1373 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { | |
1374 | /* references matched in nfs4_layoutcommit_release */ | |
1375 | get_lseg(wdata->lseg); | |
1376 | wdata->lseg->pls_lc_cred = | |
1377 | get_rpccred(wdata->args.context->state->owner->so_cred); | |
79a48a1f | 1378 | mark_as_dirty = true; |
863a3c6c AA |
1379 | dprintk("%s: Set layoutcommit for inode %lu ", |
1380 | __func__, wdata->inode->i_ino); | |
1381 | } | |
1382 | if (end_pos > wdata->lseg->pls_end_pos) | |
1383 | wdata->lseg->pls_end_pos = end_pos; | |
1384 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
79a48a1f WAA |
1385 | |
1386 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
1387 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
1388 | if (mark_as_dirty) | |
1389 | mark_inode_dirty_sync(wdata->inode); | |
863a3c6c AA |
1390 | } |
1391 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
1392 | ||
de4b15c7 AA |
1393 | /* |
1394 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
1395 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
1396 | * data to disk to allow the server to recover the data if it crashes. | |
1397 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
1398 | * is off, and a COMMIT is sent to a data server, or | |
1399 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
1400 | */ | |
863a3c6c | 1401 | int |
ef311537 | 1402 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c AA |
1403 | { |
1404 | struct nfs4_layoutcommit_data *data; | |
1405 | struct nfs_inode *nfsi = NFS_I(inode); | |
1406 | struct pnfs_layout_segment *lseg; | |
1407 | struct rpc_cred *cred; | |
1408 | loff_t end_pos; | |
1409 | int status = 0; | |
1410 | ||
1411 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); | |
1412 | ||
de4b15c7 AA |
1413 | if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
1414 | return 0; | |
1415 | ||
863a3c6c AA |
1416 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ |
1417 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
de4b15c7 AA |
1418 | if (!data) { |
1419 | mark_inode_dirty_sync(inode); | |
1420 | status = -ENOMEM; | |
1421 | goto out; | |
1422 | } | |
863a3c6c | 1423 | |
de4b15c7 | 1424 | spin_lock(&inode->i_lock); |
863a3c6c AA |
1425 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
1426 | spin_unlock(&inode->i_lock); | |
1427 | kfree(data); | |
1428 | goto out; | |
1429 | } | |
1430 | /* | |
1431 | * Currently only one (whole file) write lseg which is referenced | |
1432 | * in pnfs_set_layoutcommit and will be found. | |
1433 | */ | |
1434 | lseg = pnfs_list_write_lseg(inode); | |
1435 | ||
1436 | end_pos = lseg->pls_end_pos; | |
1437 | cred = lseg->pls_lc_cred; | |
1438 | lseg->pls_end_pos = 0; | |
1439 | lseg->pls_lc_cred = NULL; | |
1440 | ||
de4b15c7 AA |
1441 | memcpy(&data->args.stateid.data, nfsi->layout->plh_stateid.data, |
1442 | sizeof(nfsi->layout->plh_stateid.data)); | |
863a3c6c AA |
1443 | spin_unlock(&inode->i_lock); |
1444 | ||
1445 | data->args.inode = inode; | |
1446 | data->lseg = lseg; | |
1447 | data->cred = cred; | |
1448 | nfs_fattr_init(&data->fattr); | |
1449 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
1450 | data->res.fattr = &data->fattr; | |
1451 | data->args.lastbytewritten = end_pos - 1; | |
1452 | data->res.server = NFS_SERVER(inode); | |
1453 | ||
1454 | status = nfs4_proc_layoutcommit(data, sync); | |
1455 | out: | |
1456 | dprintk("<-- %s status %d\n", __func__, status); | |
1457 | return status; | |
1458 | } |