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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> |
143cb494 | 32 | #include <linux/module.h> |
974cec8c | 33 | #include "internal.h" |
85e174ba | 34 | #include "pnfs.h" |
64419a9b | 35 | #include "iostat.h" |
85e174ba RL |
36 | |
37 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 38 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 39 | |
02c35fca FI |
40 | /* Locking: |
41 | * | |
42 | * pnfs_spinlock: | |
43 | * protects pnfs_modules_tbl. | |
44 | */ | |
45 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
46 | ||
47 | /* | |
48 | * pnfs_modules_tbl holds all pnfs modules | |
49 | */ | |
50 | static LIST_HEAD(pnfs_modules_tbl); | |
51 | ||
52 | /* Return the registered pnfs layout driver module matching given id */ | |
53 | static struct pnfs_layoutdriver_type * | |
54 | find_pnfs_driver_locked(u32 id) | |
55 | { | |
56 | struct pnfs_layoutdriver_type *local; | |
57 | ||
58 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
59 | if (local->id == id) | |
60 | goto out; | |
61 | local = NULL; | |
62 | out: | |
63 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
64 | return local; | |
65 | } | |
66 | ||
85e174ba RL |
67 | static struct pnfs_layoutdriver_type * |
68 | find_pnfs_driver(u32 id) | |
69 | { | |
02c35fca FI |
70 | struct pnfs_layoutdriver_type *local; |
71 | ||
72 | spin_lock(&pnfs_spinlock); | |
73 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
74 | if (local != NULL && !try_module_get(local->owner)) { |
75 | dprintk("%s: Could not grab reference on module\n", __func__); | |
76 | local = NULL; | |
77 | } | |
02c35fca FI |
78 | spin_unlock(&pnfs_spinlock); |
79 | return local; | |
85e174ba RL |
80 | } |
81 | ||
82 | void | |
83 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
84 | { | |
738fd0f3 BH |
85 | if (nfss->pnfs_curr_ld) { |
86 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
87 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
88 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
89 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
90 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 91 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 92 | } |
85e174ba RL |
93 | nfss->pnfs_curr_ld = NULL; |
94 | } | |
95 | ||
96 | /* | |
97 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
98 | * Currently only one pNFS layout driver per filesystem is supported. | |
99 | * | |
100 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
101 | */ | |
102 | void | |
738fd0f3 BH |
103 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
104 | u32 id) | |
85e174ba RL |
105 | { |
106 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
107 | ||
108 | if (id == 0) | |
109 | goto out_no_driver; | |
110 | if (!(server->nfs_client->cl_exchange_flags & | |
111 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
a030889a WAA |
112 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
113 | __func__, id, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
114 | goto out_no_driver; |
115 | } | |
116 | ld_type = find_pnfs_driver(id); | |
117 | if (!ld_type) { | |
118 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
119 | ld_type = find_pnfs_driver(id); | |
120 | if (!ld_type) { | |
121 | dprintk("%s: No pNFS module found for %u.\n", | |
122 | __func__, id); | |
123 | goto out_no_driver; | |
124 | } | |
125 | } | |
126 | server->pnfs_curr_ld = ld_type; | |
738fd0f3 BH |
127 | if (ld_type->set_layoutdriver |
128 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
129 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
130 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
131 | module_put(ld_type->owner); |
132 | goto out_no_driver; | |
133 | } | |
2a4c8994 TM |
134 | /* Bump the MDS count */ |
135 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 136 | |
85e174ba RL |
137 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
138 | return; | |
139 | ||
140 | out_no_driver: | |
141 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
142 | server->pnfs_curr_ld = NULL; | |
143 | } | |
02c35fca FI |
144 | |
145 | int | |
146 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
147 | { | |
148 | int status = -EINVAL; | |
149 | struct pnfs_layoutdriver_type *tmp; | |
150 | ||
151 | if (ld_type->id == 0) { | |
a030889a | 152 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
153 | return status; |
154 | } | |
b1f69b75 | 155 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 156 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
157 | "alloc_lseg and free_lseg.\n", __func__); |
158 | return status; | |
159 | } | |
02c35fca FI |
160 | |
161 | spin_lock(&pnfs_spinlock); | |
162 | tmp = find_pnfs_driver_locked(ld_type->id); | |
163 | if (!tmp) { | |
164 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
165 | status = 0; | |
166 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
167 | ld_type->name); | |
168 | } else { | |
a030889a | 169 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
170 | __func__, ld_type->id); |
171 | } | |
172 | spin_unlock(&pnfs_spinlock); | |
173 | ||
174 | return status; | |
175 | } | |
176 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
177 | ||
178 | void | |
179 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
180 | { | |
181 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
182 | spin_lock(&pnfs_spinlock); | |
183 | list_del(&ld_type->pnfs_tblid); | |
184 | spin_unlock(&pnfs_spinlock); | |
185 | } | |
186 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 187 | |
b1f69b75 AA |
188 | /* |
189 | * pNFS client layout cache | |
190 | */ | |
191 | ||
cc6e5340 | 192 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 193 | void |
70c3bd2b | 194 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 195 | { |
cc6e5340 | 196 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
197 | } |
198 | ||
636fb9c8 BH |
199 | static struct pnfs_layout_hdr * |
200 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
201 | { | |
202 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 203 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
204 | } |
205 | ||
206 | static void | |
207 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
208 | { | |
9c626381 TM |
209 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
210 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
211 | ||
212 | if (!list_empty(&lo->plh_layouts)) { | |
213 | struct nfs_client *clp = server->nfs_client; | |
214 | ||
215 | spin_lock(&clp->cl_lock); | |
216 | list_del_init(&lo->plh_layouts); | |
217 | spin_unlock(&clp->cl_lock); | |
218 | } | |
9fa40758 | 219 | put_rpccred(lo->plh_lc_cred); |
57934278 | 220 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
221 | } |
222 | ||
e5e94017 | 223 | static void |
6622c3ea | 224 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 225 | { |
bb346f63 | 226 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 227 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
228 | nfsi->layout = NULL; |
229 | /* Reset MDS Threshold I/O counters */ | |
230 | nfsi->write_io = 0; | |
231 | nfsi->read_io = 0; | |
e5e94017 BH |
232 | } |
233 | ||
b1f69b75 | 234 | void |
70c3bd2b | 235 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 236 | { |
cc6e5340 FI |
237 | struct inode *inode = lo->plh_inode; |
238 | ||
239 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { | |
6622c3ea | 240 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 241 | spin_unlock(&inode->i_lock); |
6622c3ea | 242 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 243 | } |
974cec8c AA |
244 | } |
245 | ||
b9e028fd TM |
246 | static int |
247 | pnfs_iomode_to_fail_bit(u32 iomode) | |
248 | { | |
249 | return iomode == IOMODE_RW ? | |
250 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
251 | } | |
252 | ||
253 | static void | |
3e621214 | 254 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 255 | { |
25c75333 | 256 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 257 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
258 | atomic_inc(&lo->plh_refcount); |
259 | } | |
260 | ||
261 | static void | |
262 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
263 | { | |
264 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
265 | atomic_dec(&lo->plh_refcount); | |
266 | } | |
267 | ||
268 | static void | |
269 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
270 | { | |
271 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
272 | struct pnfs_layout_range range = { |
273 | .iomode = iomode, | |
274 | .offset = 0, | |
275 | .length = NFS4_MAX_UINT64, | |
276 | }; | |
277 | LIST_HEAD(head); | |
3e621214 TM |
278 | |
279 | spin_lock(&inode->i_lock); | |
280 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 281 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 282 | spin_unlock(&inode->i_lock); |
115ce575 | 283 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
284 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
285 | iomode == IOMODE_RW ? "RW" : "READ"); | |
286 | } | |
287 | ||
288 | static bool | |
289 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
290 | { | |
25c75333 | 291 | unsigned long start, end; |
3e621214 TM |
292 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
293 | ||
294 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
295 | return false; |
296 | end = jiffies; | |
297 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
298 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
299 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 300 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
301 | return false; |
302 | } | |
303 | return true; | |
b9e028fd TM |
304 | } |
305 | ||
974cec8c AA |
306 | static void |
307 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
308 | { | |
566052c5 | 309 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 310 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
311 | atomic_set(&lseg->pls_refcount, 1); |
312 | smp_mb(); | |
313 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 314 | lseg->pls_layout = lo; |
974cec8c AA |
315 | } |
316 | ||
905ca191 | 317 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 318 | { |
b7edfaa1 | 319 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 320 | |
b1f69b75 | 321 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
322 | } |
323 | ||
d684d2ae | 324 | static void |
57036a37 TM |
325 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
326 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 327 | { |
57036a37 | 328 | struct inode *inode = lo->plh_inode; |
d684d2ae | 329 | |
d20581aa | 330 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 331 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
332 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
333 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
334 | if (list_empty(&lo->plh_segs)) |
335 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
336 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
337 | } | |
338 | ||
bae724ef | 339 | void |
9369a431 | 340 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 341 | { |
57036a37 | 342 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
343 | struct inode *inode; |
344 | ||
345 | if (!lseg) | |
346 | return; | |
347 | ||
4541d16c FI |
348 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
349 | atomic_read(&lseg->pls_refcount), | |
350 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
57036a37 TM |
351 | lo = lseg->pls_layout; |
352 | inode = lo->plh_inode; | |
d684d2ae | 353 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
8f0d27dc | 354 | pnfs_get_layout_hdr(lo); |
57036a37 | 355 | pnfs_layout_remove_lseg(lo, lseg); |
d684d2ae | 356 | spin_unlock(&inode->i_lock); |
905ca191 | 357 | pnfs_free_lseg(lseg); |
8f0d27dc | 358 | pnfs_put_layout_hdr(lo); |
4541d16c | 359 | } |
4541d16c | 360 | } |
9369a431 | 361 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 362 | |
3cb2df17 | 363 | static u64 |
fb3296eb BH |
364 | end_offset(u64 start, u64 len) |
365 | { | |
366 | u64 end; | |
367 | ||
368 | end = start + len; | |
369 | return end >= start ? end : NFS4_MAX_UINT64; | |
370 | } | |
371 | ||
fb3296eb BH |
372 | /* |
373 | * is l2 fully contained in l1? | |
374 | * start1 end1 | |
375 | * [----------------------------------) | |
376 | * start2 end2 | |
377 | * [----------------) | |
378 | */ | |
3cb2df17 TM |
379 | static bool |
380 | lo_seg_contained(const struct pnfs_layout_range *l1, | |
381 | const struct pnfs_layout_range *l2) | |
fb3296eb BH |
382 | { |
383 | u64 start1 = l1->offset; | |
384 | u64 end1 = end_offset(start1, l1->length); | |
385 | u64 start2 = l2->offset; | |
386 | u64 end2 = end_offset(start2, l2->length); | |
387 | ||
388 | return (start1 <= start2) && (end1 >= end2); | |
389 | } | |
390 | ||
391 | /* | |
392 | * is l1 and l2 intersecting? | |
393 | * start1 end1 | |
394 | * [----------------------------------) | |
395 | * start2 end2 | |
396 | * [----------------) | |
397 | */ | |
3cb2df17 TM |
398 | static bool |
399 | lo_seg_intersecting(const struct pnfs_layout_range *l1, | |
400 | const struct pnfs_layout_range *l2) | |
fb3296eb BH |
401 | { |
402 | u64 start1 = l1->offset; | |
403 | u64 end1 = end_offset(start1, l1->length); | |
404 | u64 start2 = l2->offset; | |
405 | u64 end2 = end_offset(start2, l2->length); | |
406 | ||
407 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
408 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
409 | } | |
410 | ||
4541d16c | 411 | static bool |
3cb2df17 TM |
412 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
413 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 414 | { |
778b5502 BH |
415 | return (recall_range->iomode == IOMODE_ANY || |
416 | lseg_range->iomode == recall_range->iomode) && | |
417 | lo_seg_intersecting(lseg_range, recall_range); | |
974cec8c AA |
418 | } |
419 | ||
24956804 TM |
420 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
421 | struct list_head *tmp_list) | |
422 | { | |
423 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
424 | return false; | |
425 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
426 | list_add(&lseg->pls_list, tmp_list); | |
427 | return true; | |
428 | } | |
429 | ||
4541d16c FI |
430 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
431 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
432 | struct list_head *tmp_list) | |
433 | { | |
434 | int rv = 0; | |
435 | ||
436 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
437 | /* Remove the reference keeping the lseg in the | |
438 | * list. It will now be removed when all | |
439 | * outstanding io is finished. | |
440 | */ | |
d684d2ae FI |
441 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
442 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 443 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 444 | rv = 1; |
4541d16c FI |
445 | } |
446 | return rv; | |
447 | } | |
448 | ||
449 | /* Returns count of number of matching invalid lsegs remaining in list | |
450 | * after call. | |
451 | */ | |
43f1b3da | 452 | int |
49a85061 | 453 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 454 | struct list_head *tmp_list, |
778b5502 | 455 | struct pnfs_layout_range *recall_range) |
974cec8c AA |
456 | { |
457 | struct pnfs_layout_segment *lseg, *next; | |
4541d16c | 458 | int invalid = 0, removed = 0; |
974cec8c AA |
459 | |
460 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
461 | ||
8006bfba | 462 | if (list_empty(&lo->plh_segs)) |
38511722 | 463 | return 0; |
4541d16c | 464 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
465 | if (!recall_range || |
466 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
467 | dprintk("%s: freeing lseg %p iomode %d " |
468 | "offset %llu length %llu\n", __func__, | |
469 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
470 | lseg->pls_range.length); | |
471 | invalid++; | |
472 | removed += mark_lseg_invalid(lseg, tmp_list); | |
473 | } | |
474 | dprintk("%s:Return %i\n", __func__, invalid - removed); | |
475 | return invalid - removed; | |
974cec8c AA |
476 | } |
477 | ||
f49f9baa | 478 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 479 | void |
4541d16c | 480 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 481 | { |
4541d16c | 482 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
483 | |
484 | if (list_empty(free_me)) | |
485 | return; | |
486 | ||
4541d16c | 487 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 488 | list_del(&lseg->pls_list); |
905ca191 | 489 | pnfs_free_lseg(lseg); |
974cec8c AA |
490 | } |
491 | } | |
492 | ||
e5e94017 BH |
493 | void |
494 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
495 | { | |
496 | struct pnfs_layout_hdr *lo; | |
974cec8c | 497 | LIST_HEAD(tmp_list); |
e5e94017 BH |
498 | |
499 | spin_lock(&nfsi->vfs_inode.i_lock); | |
500 | lo = nfsi->layout; | |
501 | if (lo) { | |
38511722 | 502 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
49a85061 | 503 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
3e621214 TM |
504 | pnfs_get_layout_hdr(lo); |
505 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); | |
506 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
507 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
508 | pnfs_free_lseg_list(&tmp_list); | |
509 | pnfs_put_layout_hdr(lo); | |
510 | } else | |
511 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 512 | } |
041245c8 | 513 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 514 | |
fd9a8d71 TM |
515 | static bool |
516 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
517 | struct list_head *layout_list) | |
974cec8c AA |
518 | { |
519 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 520 | bool ret = false; |
974cec8c | 521 | |
fd9a8d71 TM |
522 | spin_lock(&inode->i_lock); |
523 | lo = NFS_I(inode)->layout; | |
524 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
525 | pnfs_get_layout_hdr(lo); | |
526 | list_add(&lo->plh_bulk_destroy, layout_list); | |
527 | ret = true; | |
528 | } | |
529 | spin_unlock(&inode->i_lock); | |
530 | return ret; | |
531 | } | |
532 | ||
533 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
534 | static int | |
535 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
536 | struct nfs_server *server, | |
537 | struct list_head *layout_list) | |
538 | { | |
539 | struct pnfs_layout_hdr *lo, *next; | |
540 | struct inode *inode; | |
541 | ||
542 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
543 | inode = igrab(lo->plh_inode); | |
544 | if (inode == NULL) | |
545 | continue; | |
546 | list_del_init(&lo->plh_layouts); | |
547 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
548 | continue; | |
549 | rcu_read_unlock(); | |
550 | spin_unlock(&clp->cl_lock); | |
551 | iput(inode); | |
552 | spin_lock(&clp->cl_lock); | |
553 | rcu_read_lock(); | |
554 | return -EAGAIN; | |
555 | } | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static int | |
560 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
561 | bool is_bulk_recall) | |
562 | { | |
563 | struct pnfs_layout_hdr *lo; | |
564 | struct inode *inode; | |
565 | struct pnfs_layout_range range = { | |
566 | .iomode = IOMODE_ANY, | |
567 | .offset = 0, | |
568 | .length = NFS4_MAX_UINT64, | |
569 | }; | |
570 | LIST_HEAD(lseg_list); | |
571 | int ret = 0; | |
572 | ||
573 | while (!list_empty(layout_list)) { | |
574 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
575 | plh_bulk_destroy); | |
576 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
577 | lo->plh_inode->i_ino); | |
578 | inode = lo->plh_inode; | |
579 | spin_lock(&inode->i_lock); | |
580 | list_del_init(&lo->plh_bulk_destroy); | |
581 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ | |
582 | if (is_bulk_recall) | |
583 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
584 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) | |
585 | ret = -EAGAIN; | |
586 | spin_unlock(&inode->i_lock); | |
587 | pnfs_free_lseg_list(&lseg_list); | |
588 | pnfs_put_layout_hdr(lo); | |
589 | iput(inode); | |
590 | } | |
591 | return ret; | |
592 | } | |
593 | ||
594 | int | |
595 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
596 | struct nfs_fsid *fsid, | |
597 | bool is_recall) | |
598 | { | |
599 | struct nfs_server *server; | |
600 | LIST_HEAD(layout_list); | |
c47abcf8 | 601 | |
974cec8c | 602 | spin_lock(&clp->cl_lock); |
6382a441 | 603 | rcu_read_lock(); |
fd9a8d71 | 604 | restart: |
6382a441 | 605 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
606 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
607 | continue; | |
608 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
609 | server, | |
610 | &layout_list) != 0) | |
611 | goto restart; | |
6382a441 WAA |
612 | } |
613 | rcu_read_unlock(); | |
974cec8c AA |
614 | spin_unlock(&clp->cl_lock); |
615 | ||
fd9a8d71 TM |
616 | if (list_empty(&layout_list)) |
617 | return 0; | |
618 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
619 | } | |
620 | ||
621 | int | |
622 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
623 | bool is_recall) | |
624 | { | |
625 | struct nfs_server *server; | |
626 | LIST_HEAD(layout_list); | |
627 | ||
628 | spin_lock(&clp->cl_lock); | |
629 | rcu_read_lock(); | |
630 | restart: | |
631 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
632 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
633 | server, | |
634 | &layout_list) != 0) | |
635 | goto restart; | |
974cec8c | 636 | } |
fd9a8d71 TM |
637 | rcu_read_unlock(); |
638 | spin_unlock(&clp->cl_lock); | |
639 | ||
640 | if (list_empty(&layout_list)) | |
641 | return 0; | |
642 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
643 | } | |
644 | ||
645 | /* | |
646 | * Called by the state manger to remove all layouts established under an | |
647 | * expired lease. | |
648 | */ | |
649 | void | |
650 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
651 | { | |
652 | nfs4_deviceid_mark_client_invalid(clp); | |
653 | nfs4_deviceid_purge_client(clp); | |
654 | ||
655 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
656 | } |
657 | ||
5a65503f TM |
658 | /* |
659 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
660 | * taking into account wraparound issues. | |
661 | */ | |
662 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
663 | { | |
664 | return (s32)s1 - (s32)s2 > 0; | |
665 | } | |
666 | ||
fd6002e9 | 667 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
668 | void |
669 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
670 | bool update_barrier) | |
b1f69b75 | 671 | { |
22aaf714 TM |
672 | u32 oldseq, newseq, new_barrier; |
673 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 674 | |
2d2f24ad TM |
675 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
676 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 677 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 678 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 679 | if (update_barrier) { |
22aaf714 | 680 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
681 | } else { |
682 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 683 | * "close" to the current seqids. |
43f1b3da | 684 | */ |
22aaf714 | 685 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 686 | } |
22aaf714 TM |
687 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
688 | lo->plh_barrier = new_barrier; | |
43f1b3da | 689 | } |
b1f69b75 AA |
690 | } |
691 | ||
cf7d63f1 | 692 | static bool |
19c54aba TM |
693 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
694 | const nfs4_stateid *stateid) | |
43f1b3da | 695 | { |
19c54aba | 696 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 697 | |
19c54aba TM |
698 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
699 | } | |
700 | ||
701 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
702 | static bool | |
703 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, int lget) | |
704 | { | |
f7e8917a FI |
705 | return lo->plh_block_lgets || |
706 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
43f1b3da | 707 | (list_empty(&lo->plh_segs) && |
cf7d63f1 FI |
708 | (atomic_read(&lo->plh_outstanding) > lget)); |
709 | } | |
710 | ||
fd6002e9 FI |
711 | int |
712 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
713 | struct nfs4_state *open_state) | |
b1f69b75 | 714 | { |
fd6002e9 | 715 | int status = 0; |
974cec8c | 716 | |
b1f69b75 | 717 | dprintk("--> %s\n", __func__); |
fd6002e9 | 718 | spin_lock(&lo->plh_inode->i_lock); |
19c54aba | 719 | if (pnfs_layoutgets_blocked(lo, 1)) { |
cf7d63f1 | 720 | status = -EAGAIN; |
5d422301 TM |
721 | } else if (!nfs4_valid_open_stateid(open_state)) { |
722 | status = -EBADF; | |
cf7d63f1 | 723 | } else if (list_empty(&lo->plh_segs)) { |
fd6002e9 FI |
724 | int seq; |
725 | ||
726 | do { | |
727 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 728 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
729 | } while (read_seqretry(&open_state->seqlock, seq)); |
730 | } else | |
f597c537 | 731 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 732 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 733 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 734 | return status; |
b1f69b75 AA |
735 | } |
736 | ||
737 | /* | |
738 | * Get layout from server. | |
739 | * for now, assume that whole file layouts are requested. | |
740 | * arg->offset: 0 | |
741 | * arg->length: all ones | |
742 | */ | |
e5e94017 BH |
743 | static struct pnfs_layout_segment * |
744 | send_layoutget(struct pnfs_layout_hdr *lo, | |
745 | struct nfs_open_context *ctx, | |
fb3296eb | 746 | struct pnfs_layout_range *range, |
a75b9df9 | 747 | gfp_t gfp_flags) |
e5e94017 | 748 | { |
b7edfaa1 | 749 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
750 | struct nfs_server *server = NFS_SERVER(ino); |
751 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 752 | struct pnfs_layout_segment *lseg; |
b1f69b75 AA |
753 | |
754 | dprintk("--> %s\n", __func__); | |
e5e94017 | 755 | |
a75b9df9 | 756 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
cf7d63f1 | 757 | if (lgp == NULL) |
b1f69b75 | 758 | return NULL; |
35124a09 | 759 | |
fb3296eb BH |
760 | lgp->args.minlength = PAGE_CACHE_SIZE; |
761 | if (lgp->args.minlength > range->length) | |
762 | lgp->args.minlength = range->length; | |
b1f69b75 | 763 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
fb3296eb | 764 | lgp->args.range = *range; |
b1f69b75 AA |
765 | lgp->args.type = server->pnfs_curr_ld->id; |
766 | lgp->args.inode = ino; | |
767 | lgp->args.ctx = get_nfs_open_context(ctx); | |
a75b9df9 | 768 | lgp->gfp_flags = gfp_flags; |
6ab59344 | 769 | lgp->cred = lo->plh_lc_cred; |
b1f69b75 AA |
770 | |
771 | /* Synchronously retrieve layout information from server and | |
772 | * store in lseg. | |
773 | */ | |
a0b0a6e3 TM |
774 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
775 | if (IS_ERR(lseg)) { | |
776 | switch (PTR_ERR(lseg)) { | |
777 | case -ENOMEM: | |
778 | case -ERESTARTSYS: | |
779 | break; | |
780 | default: | |
781 | /* remember that LAYOUTGET failed and suspend trying */ | |
b9e028fd | 782 | pnfs_layout_io_set_failed(lo, range->iomode); |
a0b0a6e3 TM |
783 | } |
784 | return NULL; | |
974cec8c | 785 | } |
35124a09 | 786 | |
974cec8c AA |
787 | return lseg; |
788 | } | |
789 | ||
24956804 TM |
790 | static void pnfs_clear_layoutcommit(struct inode *inode, |
791 | struct list_head *head) | |
792 | { | |
793 | struct nfs_inode *nfsi = NFS_I(inode); | |
794 | struct pnfs_layout_segment *lseg, *tmp; | |
795 | ||
796 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
797 | return; | |
798 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
799 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
800 | continue; | |
801 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
802 | } | |
803 | } | |
804 | ||
293b3b06 AA |
805 | /* |
806 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
807 | * when the layout segment list is empty. | |
808 | * | |
809 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
810 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
811 | * deviceid is marked invalid. | |
812 | */ | |
cbe82603 BH |
813 | int |
814 | _pnfs_return_layout(struct inode *ino) | |
815 | { | |
816 | struct pnfs_layout_hdr *lo = NULL; | |
817 | struct nfs_inode *nfsi = NFS_I(ino); | |
818 | LIST_HEAD(tmp_list); | |
819 | struct nfs4_layoutreturn *lrp; | |
820 | nfs4_stateid stateid; | |
293b3b06 | 821 | int status = 0, empty; |
cbe82603 | 822 | |
366d5052 | 823 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
824 | |
825 | spin_lock(&ino->i_lock); | |
826 | lo = nfsi->layout; | |
e5929f3c | 827 | if (!lo) { |
cbe82603 | 828 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
829 | dprintk("NFS: %s no layout to return\n", __func__); |
830 | goto out; | |
cbe82603 BH |
831 | } |
832 | stateid = nfsi->layout->plh_stateid; | |
833 | /* Reference matched in nfs4_layoutreturn_release */ | |
70c3bd2b | 834 | pnfs_get_layout_hdr(lo); |
293b3b06 | 835 | empty = list_empty(&lo->plh_segs); |
24956804 | 836 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 837 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
293b3b06 AA |
838 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
839 | if (empty) { | |
840 | spin_unlock(&ino->i_lock); | |
70c3bd2b | 841 | pnfs_put_layout_hdr(lo); |
293b3b06 AA |
842 | dprintk("NFS: %s no layout segments to return\n", __func__); |
843 | goto out; | |
844 | } | |
ea0ded74 | 845 | lo->plh_block_lgets++; |
cbe82603 BH |
846 | spin_unlock(&ino->i_lock); |
847 | pnfs_free_lseg_list(&tmp_list); | |
848 | ||
cbe82603 BH |
849 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); |
850 | if (unlikely(lrp == NULL)) { | |
851 | status = -ENOMEM; | |
65857d57 TM |
852 | spin_lock(&ino->i_lock); |
853 | lo->plh_block_lgets--; | |
854 | spin_unlock(&ino->i_lock); | |
70c3bd2b | 855 | pnfs_put_layout_hdr(lo); |
cbe82603 BH |
856 | goto out; |
857 | } | |
858 | ||
859 | lrp->args.stateid = stateid; | |
860 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; | |
861 | lrp->args.inode = ino; | |
a56aaa02 | 862 | lrp->args.layout = lo; |
cbe82603 | 863 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
9556000d | 864 | lrp->cred = lo->plh_lc_cred; |
cbe82603 BH |
865 | |
866 | status = nfs4_proc_layoutreturn(lrp); | |
867 | out: | |
868 | dprintk("<-- %s status: %d\n", __func__, status); | |
869 | return status; | |
870 | } | |
0a57cdac | 871 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 872 | |
24028672 TM |
873 | int |
874 | pnfs_commit_and_return_layout(struct inode *inode) | |
875 | { | |
876 | struct pnfs_layout_hdr *lo; | |
877 | int ret; | |
878 | ||
879 | spin_lock(&inode->i_lock); | |
880 | lo = NFS_I(inode)->layout; | |
881 | if (lo == NULL) { | |
882 | spin_unlock(&inode->i_lock); | |
883 | return 0; | |
884 | } | |
885 | pnfs_get_layout_hdr(lo); | |
886 | /* Block new layoutgets and read/write to ds */ | |
887 | lo->plh_block_lgets++; | |
888 | spin_unlock(&inode->i_lock); | |
889 | filemap_fdatawait(inode->i_mapping); | |
890 | ret = pnfs_layoutcommit_inode(inode, true); | |
891 | if (ret == 0) | |
892 | ret = _pnfs_return_layout(inode); | |
893 | spin_lock(&inode->i_lock); | |
894 | lo->plh_block_lgets--; | |
895 | spin_unlock(&inode->i_lock); | |
896 | pnfs_put_layout_hdr(lo); | |
897 | return ret; | |
898 | } | |
899 | ||
f7e8917a FI |
900 | bool pnfs_roc(struct inode *ino) |
901 | { | |
902 | struct pnfs_layout_hdr *lo; | |
903 | struct pnfs_layout_segment *lseg, *tmp; | |
904 | LIST_HEAD(tmp_list); | |
905 | bool found = false; | |
906 | ||
907 | spin_lock(&ino->i_lock); | |
908 | lo = NFS_I(ino)->layout; | |
909 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || | |
910 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) | |
911 | goto out_nolayout; | |
912 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) | |
913 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
914 | mark_lseg_invalid(lseg, &tmp_list); | |
915 | found = true; | |
916 | } | |
917 | if (!found) | |
918 | goto out_nolayout; | |
919 | lo->plh_block_lgets++; | |
70c3bd2b | 920 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
f7e8917a FI |
921 | spin_unlock(&ino->i_lock); |
922 | pnfs_free_lseg_list(&tmp_list); | |
923 | return true; | |
924 | ||
925 | out_nolayout: | |
926 | spin_unlock(&ino->i_lock); | |
927 | return false; | |
928 | } | |
929 | ||
930 | void pnfs_roc_release(struct inode *ino) | |
931 | { | |
932 | struct pnfs_layout_hdr *lo; | |
933 | ||
934 | spin_lock(&ino->i_lock); | |
935 | lo = NFS_I(ino)->layout; | |
936 | lo->plh_block_lgets--; | |
6622c3ea TM |
937 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
938 | pnfs_detach_layout_hdr(lo); | |
939 | spin_unlock(&ino->i_lock); | |
940 | pnfs_free_layout_hdr(lo); | |
941 | } else | |
942 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
943 | } |
944 | ||
945 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
946 | { | |
947 | struct pnfs_layout_hdr *lo; | |
948 | ||
949 | spin_lock(&ino->i_lock); | |
950 | lo = NFS_I(ino)->layout; | |
0f35ad6f | 951 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
952 | lo->plh_barrier = barrier; |
953 | spin_unlock(&ino->i_lock); | |
954 | } | |
955 | ||
7fdab069 | 956 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
f7e8917a FI |
957 | { |
958 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 959 | struct pnfs_layout_hdr *lo; |
f7e8917a | 960 | struct pnfs_layout_segment *lseg; |
7fdab069 | 961 | u32 current_seqid; |
f7e8917a FI |
962 | bool found = false; |
963 | ||
964 | spin_lock(&ino->i_lock); | |
965 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) | |
966 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
7fdab069 | 967 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
f7e8917a | 968 | found = true; |
7fdab069 | 969 | goto out; |
f7e8917a | 970 | } |
7fdab069 TM |
971 | lo = nfsi->layout; |
972 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 973 | |
7fdab069 TM |
974 | /* Since close does not return a layout stateid for use as |
975 | * a barrier, we choose the worst-case barrier. | |
976 | */ | |
977 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
978 | out: | |
f7e8917a FI |
979 | spin_unlock(&ino->i_lock); |
980 | return found; | |
981 | } | |
982 | ||
b1f69b75 AA |
983 | /* |
984 | * Compare two layout segments for sorting into layout cache. | |
985 | * We want to preferentially return RW over RO layouts, so ensure those | |
986 | * are seen first. | |
987 | */ | |
988 | static s64 | |
3cb2df17 TM |
989 | cmp_layout(const struct pnfs_layout_range *l1, |
990 | const struct pnfs_layout_range *l2) | |
b1f69b75 | 991 | { |
fb3296eb BH |
992 | s64 d; |
993 | ||
994 | /* high offset > low offset */ | |
995 | d = l1->offset - l2->offset; | |
996 | if (d) | |
997 | return d; | |
998 | ||
999 | /* short length > long length */ | |
1000 | d = l2->length - l1->length; | |
1001 | if (d) | |
1002 | return d; | |
1003 | ||
b1f69b75 | 1004 | /* read > read/write */ |
fb3296eb | 1005 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1006 | } |
1007 | ||
974cec8c | 1008 | static void |
57036a37 | 1009 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
974cec8c AA |
1010 | struct pnfs_layout_segment *lseg) |
1011 | { | |
b1f69b75 | 1012 | struct pnfs_layout_segment *lp; |
b1f69b75 | 1013 | |
974cec8c AA |
1014 | dprintk("%s:Begin\n", __func__); |
1015 | ||
b7edfaa1 | 1016 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
fb3296eb | 1017 | if (cmp_layout(&lseg->pls_range, &lp->pls_range) > 0) |
b1f69b75 | 1018 | continue; |
566052c5 | 1019 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1020 | dprintk("%s: inserted lseg %p " |
1021 | "iomode %d offset %llu length %llu before " | |
1022 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1023 | __func__, lseg, lseg->pls_range.iomode, |
1024 | lseg->pls_range.offset, lseg->pls_range.length, | |
1025 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1026 | lp->pls_range.length); | |
fb3296eb | 1027 | goto out; |
974cec8c | 1028 | } |
fb3296eb BH |
1029 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1030 | dprintk("%s: inserted lseg %p " | |
1031 | "iomode %d offset %llu length %llu at tail\n", | |
1032 | __func__, lseg, lseg->pls_range.iomode, | |
1033 | lseg->pls_range.offset, lseg->pls_range.length); | |
1034 | out: | |
70c3bd2b | 1035 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1036 | |
1037 | dprintk("%s:Return\n", __func__); | |
e5e94017 BH |
1038 | } |
1039 | ||
1040 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1041 | alloc_init_layout_hdr(struct inode *ino, |
1042 | struct nfs_open_context *ctx, | |
1043 | gfp_t gfp_flags) | |
e5e94017 BH |
1044 | { |
1045 | struct pnfs_layout_hdr *lo; | |
1046 | ||
636fb9c8 | 1047 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1048 | if (!lo) |
1049 | return NULL; | |
cc6e5340 | 1050 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1051 | INIT_LIST_HEAD(&lo->plh_layouts); |
1052 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1053 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1054 | lo->plh_inode = ino; |
5cc2216d | 1055 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1056 | return lo; |
1057 | } | |
1058 | ||
1059 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1060 | pnfs_find_alloc_layout(struct inode *ino, |
1061 | struct nfs_open_context *ctx, | |
1062 | gfp_t gfp_flags) | |
e5e94017 BH |
1063 | { |
1064 | struct nfs_inode *nfsi = NFS_I(ino); | |
1065 | struct pnfs_layout_hdr *new = NULL; | |
1066 | ||
1067 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1068 | ||
251ec410 TM |
1069 | if (nfsi->layout != NULL) |
1070 | goto out_existing; | |
e5e94017 | 1071 | spin_unlock(&ino->i_lock); |
9fa40758 | 1072 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1073 | spin_lock(&ino->i_lock); |
1074 | ||
251ec410 | 1075 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1076 | nfsi->layout = new; |
251ec410 | 1077 | return new; |
7175fe90 YN |
1078 | } else if (new != NULL) |
1079 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1080 | out_existing: |
1081 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1082 | return nfsi->layout; |
1083 | } | |
1084 | ||
b1f69b75 AA |
1085 | /* |
1086 | * iomode matching rules: | |
1087 | * iomode lseg match | |
1088 | * ----- ----- ----- | |
1089 | * ANY READ true | |
1090 | * ANY RW true | |
1091 | * RW READ false | |
1092 | * RW RW true | |
1093 | * READ READ true | |
1094 | * READ RW true | |
1095 | */ | |
3cb2df17 TM |
1096 | static bool |
1097 | is_matching_lseg(const struct pnfs_layout_range *ls_range, | |
1098 | const struct pnfs_layout_range *range) | |
b1f69b75 | 1099 | { |
fb3296eb BH |
1100 | struct pnfs_layout_range range1; |
1101 | ||
1102 | if ((range->iomode == IOMODE_RW && | |
1103 | ls_range->iomode != IOMODE_RW) || | |
1104 | !lo_seg_intersecting(ls_range, range)) | |
1105 | return 0; | |
1106 | ||
1107 | /* range1 covers only the first byte in the range */ | |
1108 | range1 = *range; | |
1109 | range1.length = 1; | |
1110 | return lo_seg_contained(ls_range, &range1); | |
b1f69b75 AA |
1111 | } |
1112 | ||
1113 | /* | |
1114 | * lookup range in layout | |
1115 | */ | |
e5e94017 | 1116 | static struct pnfs_layout_segment * |
fb3296eb BH |
1117 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1118 | struct pnfs_layout_range *range) | |
e5e94017 | 1119 | { |
b1f69b75 AA |
1120 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1121 | ||
1122 | dprintk("%s:Begin\n", __func__); | |
1123 | ||
b7edfaa1 | 1124 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1125 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
fb3296eb | 1126 | is_matching_lseg(&lseg->pls_range, range)) { |
9369a431 | 1127 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1128 | break; |
1129 | } | |
d771e3a4 | 1130 | if (lseg->pls_range.offset > range->offset) |
b1f69b75 AA |
1131 | break; |
1132 | } | |
1133 | ||
1134 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1135 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1136 | return ret; |
e5e94017 BH |
1137 | } |
1138 | ||
d23d61c8 AA |
1139 | /* |
1140 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1141 | * to the MDS or over pNFS | |
1142 | * | |
1143 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1144 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1145 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1146 | * WRITE request. | |
1147 | * | |
1148 | * A return of true means use MDS I/O. | |
1149 | * | |
1150 | * From rfc 5661: | |
1151 | * If a file's size is smaller than the file size threshold, data accesses | |
1152 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1153 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1154 | * server. If both file size and I/O size are provided, the client SHOULD | |
1155 | * reach or exceed both thresholds before sending its read or write | |
1156 | * requests to the data server. | |
1157 | */ | |
1158 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1159 | struct inode *ino, int iomode) | |
1160 | { | |
1161 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1162 | struct nfs_inode *nfsi = NFS_I(ino); | |
1163 | loff_t fsize = i_size_read(ino); | |
1164 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1165 | ||
1166 | if (t == NULL) | |
1167 | return ret; | |
1168 | ||
1169 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1170 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1171 | ||
1172 | switch (iomode) { | |
1173 | case IOMODE_READ: | |
1174 | if (t->bm & THRESHOLD_RD) { | |
1175 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1176 | size_set = true; | |
1177 | if (fsize < t->rd_sz) | |
1178 | size = true; | |
1179 | } | |
1180 | if (t->bm & THRESHOLD_RD_IO) { | |
1181 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1182 | nfsi->read_io); | |
1183 | io_set = true; | |
1184 | if (nfsi->read_io < t->rd_io_sz) | |
1185 | io = true; | |
1186 | } | |
1187 | break; | |
1188 | case IOMODE_RW: | |
1189 | if (t->bm & THRESHOLD_WR) { | |
1190 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1191 | size_set = true; | |
1192 | if (fsize < t->wr_sz) | |
1193 | size = true; | |
1194 | } | |
1195 | if (t->bm & THRESHOLD_WR_IO) { | |
1196 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1197 | nfsi->write_io); | |
1198 | io_set = true; | |
1199 | if (nfsi->write_io < t->wr_io_sz) | |
1200 | io = true; | |
1201 | } | |
1202 | break; | |
1203 | } | |
1204 | if (size_set && io_set) { | |
1205 | if (size && io) | |
1206 | ret = true; | |
1207 | } else if (size || io) | |
1208 | ret = true; | |
1209 | ||
1210 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1211 | return ret; | |
1212 | } | |
1213 | ||
e5e94017 BH |
1214 | /* |
1215 | * Layout segment is retreived from the server if not cached. | |
1216 | * The appropriate layout segment is referenced and returned to the caller. | |
1217 | */ | |
7c24d948 | 1218 | struct pnfs_layout_segment * |
e5e94017 BH |
1219 | pnfs_update_layout(struct inode *ino, |
1220 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1221 | loff_t pos, |
1222 | u64 count, | |
a75b9df9 TM |
1223 | enum pnfs_iomode iomode, |
1224 | gfp_t gfp_flags) | |
e5e94017 | 1225 | { |
fb3296eb BH |
1226 | struct pnfs_layout_range arg = { |
1227 | .iomode = iomode, | |
1228 | .offset = pos, | |
1229 | .length = count, | |
1230 | }; | |
707ed5fd | 1231 | unsigned pg_offset; |
6382a441 WAA |
1232 | struct nfs_server *server = NFS_SERVER(ino); |
1233 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1234 | struct pnfs_layout_hdr *lo; |
1235 | struct pnfs_layout_segment *lseg = NULL; | |
30005121 | 1236 | bool first; |
e5e94017 BH |
1237 | |
1238 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) | |
f86bbcf8 | 1239 | goto out; |
d23d61c8 AA |
1240 | |
1241 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) | |
f86bbcf8 | 1242 | goto out; |
d23d61c8 | 1243 | |
e5e94017 | 1244 | spin_lock(&ino->i_lock); |
9fa40758 | 1245 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1246 | if (lo == NULL) { |
1247 | spin_unlock(&ino->i_lock); | |
1248 | goto out; | |
1249 | } | |
e5e94017 | 1250 | |
43f1b3da | 1251 | /* Do we even need to bother with this? */ |
a59c30ac | 1252 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da | 1253 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1254 | goto out_unlock; |
1255 | } | |
1256 | ||
1257 | /* if LAYOUTGET already failed once we don't try again */ | |
b9e028fd | 1258 | if (pnfs_layout_io_test_failed(lo, iomode)) |
e5e94017 BH |
1259 | goto out_unlock; |
1260 | ||
568e8c49 | 1261 | /* Check to see if the layout for the given range already exists */ |
fb3296eb | 1262 | lseg = pnfs_find_lseg(lo, &arg); |
568e8c49 AA |
1263 | if (lseg) |
1264 | goto out_unlock; | |
1265 | ||
19c54aba | 1266 | if (pnfs_layoutgets_blocked(lo, 0)) |
cf7d63f1 FI |
1267 | goto out_unlock; |
1268 | atomic_inc(&lo->plh_outstanding); | |
1269 | ||
30005121 | 1270 | first = list_empty(&lo->plh_layouts) ? true : false; |
f49f9baa | 1271 | spin_unlock(&ino->i_lock); |
30005121 | 1272 | |
f49f9baa | 1273 | if (first) { |
2130ff66 FI |
1274 | /* The lo must be on the clp list if there is any |
1275 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1276 | */ | |
1277 | spin_lock(&clp->cl_lock); | |
6382a441 | 1278 | list_add_tail(&lo->plh_layouts, &server->layouts); |
2130ff66 FI |
1279 | spin_unlock(&clp->cl_lock); |
1280 | } | |
e5e94017 | 1281 | |
707ed5fd BH |
1282 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1283 | if (pg_offset) { | |
1284 | arg.offset -= pg_offset; | |
1285 | arg.length += pg_offset; | |
1286 | } | |
7c24d948 AA |
1287 | if (arg.length != NFS4_MAX_UINT64) |
1288 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1289 | |
fb3296eb | 1290 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
cf7d63f1 | 1291 | atomic_dec(&lo->plh_outstanding); |
830ffb56 | 1292 | out_put_layout_hdr: |
70c3bd2b | 1293 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1294 | out: |
f86bbcf8 TM |
1295 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1296 | "(%s, offset: %llu, length: %llu)\n", | |
1297 | __func__, ino->i_sb->s_id, | |
1298 | (unsigned long long)NFS_FILEID(ino), | |
1299 | lseg == NULL ? "not found" : "found", | |
1300 | iomode==IOMODE_RW ? "read/write" : "read-only", | |
1301 | (unsigned long long)pos, | |
1302 | (unsigned long long)count); | |
e5e94017 BH |
1303 | return lseg; |
1304 | out_unlock: | |
1305 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1306 | goto out_put_layout_hdr; |
e5e94017 | 1307 | } |
7c24d948 | 1308 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1309 | |
a0b0a6e3 | 1310 | struct pnfs_layout_segment * |
b1f69b75 AA |
1311 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1312 | { | |
1313 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1314 | struct nfs4_layoutget_res *res = &lgp->res; | |
1315 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1316 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
1317 | int status = 0; |
1318 | ||
1319 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1320 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1321 | if (!lseg || IS_ERR(lseg)) { |
1322 | if (!lseg) | |
1323 | status = -ENOMEM; | |
1324 | else | |
1325 | status = PTR_ERR(lseg); | |
1326 | dprintk("%s: Could not allocate layout: error %d\n", | |
1327 | __func__, status); | |
1328 | goto out; | |
1329 | } | |
1330 | ||
1331 | spin_lock(&ino->i_lock); | |
a59c30ac | 1332 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da FI |
1333 | dprintk("%s forget reply due to recall\n", __func__); |
1334 | goto out_forget_reply; | |
1335 | } | |
1336 | ||
19c54aba TM |
1337 | if (pnfs_layoutgets_blocked(lo, 1) || |
1338 | pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
43f1b3da FI |
1339 | dprintk("%s forget reply due to state\n", __func__); |
1340 | goto out_forget_reply; | |
1341 | } | |
038d6493 TM |
1342 | |
1343 | /* Done processing layoutget. Set the layout stateid */ | |
1344 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1345 | ||
b1f69b75 | 1346 | init_lseg(lo, lseg); |
566052c5 | 1347 | lseg->pls_range = res->range; |
9369a431 | 1348 | pnfs_get_lseg(lseg); |
57036a37 | 1349 | pnfs_layout_insert_lseg(lo, lseg); |
b1f69b75 | 1350 | |
f7e8917a FI |
1351 | if (res->return_on_close) { |
1352 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
1353 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); | |
1354 | } | |
1355 | ||
b1f69b75 | 1356 | spin_unlock(&ino->i_lock); |
a0b0a6e3 | 1357 | return lseg; |
b1f69b75 | 1358 | out: |
a0b0a6e3 | 1359 | return ERR_PTR(status); |
43f1b3da FI |
1360 | |
1361 | out_forget_reply: | |
1362 | spin_unlock(&ino->i_lock); | |
1363 | lseg->pls_layout = lo; | |
1364 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1365 | goto out; | |
b1f69b75 AA |
1366 | } |
1367 | ||
d8007d4d TM |
1368 | void |
1369 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1370 | { | |
1fd937bd PT |
1371 | u64 rd_size = req->wb_bytes; |
1372 | ||
bc5a89b3 | 1373 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
d8007d4d | 1374 | |
1825a0d0 FI |
1375 | if (req->wb_offset != req->wb_pgbase) { |
1376 | nfs_pageio_reset_read_mds(pgio); | |
1377 | return; | |
1378 | } | |
1fd937bd PT |
1379 | |
1380 | if (pgio->pg_dreq == NULL) | |
1381 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1382 | else | |
1383 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1384 | ||
d8007d4d TM |
1385 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1386 | req->wb_context, | |
1387 | req_offset(req), | |
1fd937bd | 1388 | rd_size, |
d8007d4d TM |
1389 | IOMODE_READ, |
1390 | GFP_KERNEL); | |
e885de1a TM |
1391 | /* If no lseg, fall back to read through mds */ |
1392 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1393 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1394 | |
d8007d4d TM |
1395 | } |
1396 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1397 | ||
1398 | void | |
6296556f PT |
1399 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1400 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1401 | { |
bc5a89b3 | 1402 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
d8007d4d | 1403 | |
1825a0d0 FI |
1404 | if (req->wb_offset != req->wb_pgbase) { |
1405 | nfs_pageio_reset_write_mds(pgio); | |
1406 | return; | |
1407 | } | |
6296556f | 1408 | |
d8007d4d TM |
1409 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1410 | req->wb_context, | |
1411 | req_offset(req), | |
6296556f | 1412 | wb_size, |
d8007d4d TM |
1413 | IOMODE_RW, |
1414 | GFP_NOFS); | |
e885de1a TM |
1415 | /* If no lseg, fall back to write through mds */ |
1416 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1417 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1418 | } |
1419 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1420 | ||
1abb5088 | 1421 | void |
061ae2ed FI |
1422 | pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode, |
1423 | const struct nfs_pgio_completion_ops *compl_ops) | |
1751c363 TM |
1424 | { |
1425 | struct nfs_server *server = NFS_SERVER(inode); | |
1426 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
1427 | ||
1428 | if (ld == NULL) | |
1abb5088 BS |
1429 | nfs_pageio_init_read(pgio, inode, compl_ops); |
1430 | else | |
1431 | nfs_pageio_init(pgio, inode, ld->pg_read_ops, compl_ops, server->rsize, 0); | |
1751c363 TM |
1432 | } |
1433 | ||
57208fa7 | 1434 | void |
061ae2ed FI |
1435 | pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, |
1436 | int ioflags, | |
1437 | const struct nfs_pgio_completion_ops *compl_ops) | |
1751c363 TM |
1438 | { |
1439 | struct nfs_server *server = NFS_SERVER(inode); | |
1440 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
1441 | ||
1442 | if (ld == NULL) | |
57208fa7 BS |
1443 | nfs_pageio_init_write(pgio, inode, ioflags, compl_ops); |
1444 | else | |
1445 | nfs_pageio_init(pgio, inode, ld->pg_write_ops, compl_ops, server->wsize, ioflags); | |
1751c363 TM |
1446 | } |
1447 | ||
18ad0a9f | 1448 | bool |
dfed206b BH |
1449 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
1450 | struct nfs_page *req) | |
94ad1c80 | 1451 | { |
d8007d4d TM |
1452 | if (pgio->pg_lseg == NULL) |
1453 | return nfs_generic_pg_test(pgio, prev, req); | |
94ad1c80 | 1454 | |
19982ba8 TM |
1455 | /* |
1456 | * Test if a nfs_page is fully contained in the pnfs_layout_range. | |
1457 | * Note that this test makes several assumptions: | |
1458 | * - that the previous nfs_page in the struct nfs_pageio_descriptor | |
1459 | * is known to lie within the range. | |
1460 | * - that the nfs_page being tested is known to be contiguous with the | |
1461 | * previous nfs_page. | |
1462 | * - Layout ranges are page aligned, so we only have to test the | |
1463 | * start offset of the request. | |
1464 | * | |
1465 | * Please also note that 'end_offset' is actually the offset of the | |
1466 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1467 | * | |
1468 | */ | |
1469 | return req_offset(req) < end_offset(pgio->pg_lseg->pls_range.offset, | |
1470 | pgio->pg_lseg->pls_range.length); | |
94ad1c80 | 1471 | } |
89a58e32 | 1472 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1473 | |
e7dd79af | 1474 | int pnfs_write_done_resend_to_mds(struct inode *inode, |
061ae2ed | 1475 | struct list_head *head, |
78f33277 BH |
1476 | const struct nfs_pgio_completion_ops *compl_ops, |
1477 | struct nfs_direct_req *dreq) | |
e2fecb21 TM |
1478 | { |
1479 | struct nfs_pageio_descriptor pgio; | |
1480 | LIST_HEAD(failed); | |
1481 | ||
1482 | /* Resend all requests through the MDS */ | |
57208fa7 | 1483 | nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, compl_ops); |
78f33277 | 1484 | pgio.pg_dreq = dreq; |
e2fecb21 TM |
1485 | while (!list_empty(head)) { |
1486 | struct nfs_page *req = nfs_list_entry(head->next); | |
1487 | ||
1488 | nfs_list_remove_request(req); | |
1489 | if (!nfs_pageio_add_request(&pgio, req)) | |
1490 | nfs_list_add_request(req, &failed); | |
1491 | } | |
1492 | nfs_pageio_complete(&pgio); | |
1493 | ||
1494 | if (!list_empty(&failed)) { | |
1495 | /* For some reason our attempt to resend pages. Mark the | |
1496 | * overall send request as having failed, and let | |
1497 | * nfs_writeback_release_full deal with the error. | |
1498 | */ | |
1499 | list_move(&failed, head); | |
1500 | return -EIO; | |
1501 | } | |
1502 | return 0; | |
1503 | } | |
e7dd79af | 1504 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1505 | |
1acbbb4e FI |
1506 | static void pnfs_ld_handle_write_error(struct nfs_write_data *data) |
1507 | { | |
cd841605 FI |
1508 | struct nfs_pgio_header *hdr = data->header; |
1509 | ||
1510 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1511 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1512 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1513 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1514 | } |
6c75dc0d FI |
1515 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
1516 | data->task.tk_status = pnfs_write_done_resend_to_mds(hdr->inode, | |
061ae2ed | 1517 | &hdr->pages, |
78f33277 BH |
1518 | hdr->completion_ops, |
1519 | hdr->dreq); | |
1acbbb4e FI |
1520 | } |
1521 | ||
d20581aa BH |
1522 | /* |
1523 | * Called by non rpc-based layout drivers | |
1524 | */ | |
8ce160c5 | 1525 | void pnfs_ld_write_done(struct nfs_write_data *data) |
44b83799 | 1526 | { |
cd841605 FI |
1527 | struct nfs_pgio_header *hdr = data->header; |
1528 | ||
1529 | if (!hdr->pnfs_error) { | |
d20581aa | 1530 | pnfs_set_layoutcommit(data); |
cd841605 | 1531 | hdr->mds_ops->rpc_call_done(&data->task, data); |
1acbbb4e FI |
1532 | } else |
1533 | pnfs_ld_handle_write_error(data); | |
cd841605 | 1534 | hdr->mds_ops->rpc_release(data); |
44b83799 | 1535 | } |
d20581aa | 1536 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1537 | |
dce81290 TM |
1538 | static void |
1539 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
1540 | struct nfs_write_data *data) | |
1541 | { | |
cd841605 FI |
1542 | struct nfs_pgio_header *hdr = data->header; |
1543 | ||
6c75dc0d FI |
1544 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
1545 | list_splice_tail_init(&hdr->pages, &desc->pg_list); | |
1546 | nfs_pageio_reset_write_mds(desc); | |
1547 | desc->pg_recoalesce = 1; | |
1548 | } | |
dce81290 TM |
1549 | nfs_writedata_release(data); |
1550 | } | |
1551 | ||
1552 | static enum pnfs_try_status | |
0382b744 | 1553 | pnfs_try_to_write_data(struct nfs_write_data *wdata, |
dce81290 TM |
1554 | const struct rpc_call_ops *call_ops, |
1555 | struct pnfs_layout_segment *lseg, | |
1556 | int how) | |
0382b744 | 1557 | { |
cd841605 FI |
1558 | struct nfs_pgio_header *hdr = wdata->header; |
1559 | struct inode *inode = hdr->inode; | |
0382b744 AA |
1560 | enum pnfs_try_status trypnfs; |
1561 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1562 | ||
cd841605 | 1563 | hdr->mds_ops = call_ops; |
0382b744 AA |
1564 | |
1565 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
1566 | inode->i_ino, wdata->args.count, wdata->args.offset, how); | |
0382b744 | 1567 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how); |
6c75dc0d | 1568 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 1569 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
1570 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1571 | return trypnfs; | |
1572 | } | |
1573 | ||
dce81290 TM |
1574 | static void |
1575 | pnfs_do_multiple_writes(struct nfs_pageio_descriptor *desc, struct list_head *head, int how) | |
1576 | { | |
1577 | struct nfs_write_data *data; | |
1578 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; | |
1579 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
1580 | ||
1581 | desc->pg_lseg = NULL; | |
1582 | while (!list_empty(head)) { | |
1583 | enum pnfs_try_status trypnfs; | |
1584 | ||
6c75dc0d | 1585 | data = list_first_entry(head, struct nfs_write_data, list); |
dce81290 TM |
1586 | list_del_init(&data->list); |
1587 | ||
1588 | trypnfs = pnfs_try_to_write_data(data, call_ops, lseg, how); | |
1589 | if (trypnfs == PNFS_NOT_ATTEMPTED) | |
1590 | pnfs_write_through_mds(desc, data); | |
1591 | } | |
9369a431 | 1592 | pnfs_put_lseg(lseg); |
dce81290 TM |
1593 | } |
1594 | ||
6c75dc0d FI |
1595 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
1596 | { | |
9369a431 | 1597 | pnfs_put_lseg(hdr->lseg); |
6c75dc0d FI |
1598 | nfs_writehdr_free(hdr); |
1599 | } | |
89d77c8f | 1600 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
6c75dc0d | 1601 | |
dce81290 TM |
1602 | int |
1603 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
1604 | { | |
6c75dc0d FI |
1605 | struct nfs_write_header *whdr; |
1606 | struct nfs_pgio_header *hdr; | |
dce81290 TM |
1607 | int ret; |
1608 | ||
6c75dc0d FI |
1609 | whdr = nfs_writehdr_alloc(); |
1610 | if (!whdr) { | |
9b5415b5 | 1611 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
9369a431 | 1612 | pnfs_put_lseg(desc->pg_lseg); |
dce81290 | 1613 | desc->pg_lseg = NULL; |
6c75dc0d | 1614 | return -ENOMEM; |
dce81290 | 1615 | } |
6c75dc0d FI |
1616 | hdr = &whdr->header; |
1617 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); | |
9369a431 | 1618 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
6c75dc0d FI |
1619 | atomic_inc(&hdr->refcnt); |
1620 | ret = nfs_generic_flush(desc, hdr); | |
1621 | if (ret != 0) { | |
9369a431 | 1622 | pnfs_put_lseg(desc->pg_lseg); |
6c75dc0d | 1623 | desc->pg_lseg = NULL; |
6c75dc0d FI |
1624 | } else |
1625 | pnfs_do_multiple_writes(desc, &hdr->rpc_list, desc->pg_ioflags); | |
1626 | if (atomic_dec_and_test(&hdr->refcnt)) | |
061ae2ed | 1627 | hdr->completion_ops->completion(hdr); |
6c75dc0d | 1628 | return ret; |
dce81290 TM |
1629 | } |
1630 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
1631 | ||
e7dd79af | 1632 | int pnfs_read_done_resend_to_mds(struct inode *inode, |
061ae2ed | 1633 | struct list_head *head, |
78f33277 BH |
1634 | const struct nfs_pgio_completion_ops *compl_ops, |
1635 | struct nfs_direct_req *dreq) | |
62e4a769 TM |
1636 | { |
1637 | struct nfs_pageio_descriptor pgio; | |
1acbbb4e | 1638 | LIST_HEAD(failed); |
62e4a769 | 1639 | |
1acbbb4e | 1640 | /* Resend all requests through the MDS */ |
1abb5088 | 1641 | nfs_pageio_init_read(&pgio, inode, compl_ops); |
78f33277 | 1642 | pgio.pg_dreq = dreq; |
1acbbb4e FI |
1643 | while (!list_empty(head)) { |
1644 | struct nfs_page *req = nfs_list_entry(head->next); | |
62e4a769 TM |
1645 | |
1646 | nfs_list_remove_request(req); | |
1acbbb4e FI |
1647 | if (!nfs_pageio_add_request(&pgio, req)) |
1648 | nfs_list_add_request(req, &failed); | |
62e4a769 TM |
1649 | } |
1650 | nfs_pageio_complete(&pgio); | |
1acbbb4e FI |
1651 | |
1652 | if (!list_empty(&failed)) { | |
1653 | list_move(&failed, head); | |
1654 | return -EIO; | |
1655 | } | |
1656 | return 0; | |
1657 | } | |
e7dd79af | 1658 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e FI |
1659 | |
1660 | static void pnfs_ld_handle_read_error(struct nfs_read_data *data) | |
1661 | { | |
cd841605 FI |
1662 | struct nfs_pgio_header *hdr = data->header; |
1663 | ||
1664 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); | |
1665 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1666 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1667 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1668 | } |
4db6e0b7 FI |
1669 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
1670 | data->task.tk_status = pnfs_read_done_resend_to_mds(hdr->inode, | |
061ae2ed | 1671 | &hdr->pages, |
78f33277 BH |
1672 | hdr->completion_ops, |
1673 | hdr->dreq); | |
62e4a769 TM |
1674 | } |
1675 | ||
d20581aa BH |
1676 | /* |
1677 | * Called by non rpc-based layout drivers | |
1678 | */ | |
9b7eecdc | 1679 | void pnfs_ld_read_done(struct nfs_read_data *data) |
d20581aa | 1680 | { |
cd841605 FI |
1681 | struct nfs_pgio_header *hdr = data->header; |
1682 | ||
1683 | if (likely(!hdr->pnfs_error)) { | |
d20581aa | 1684 | __nfs4_read_done_cb(data); |
cd841605 | 1685 | hdr->mds_ops->rpc_call_done(&data->task, data); |
62e4a769 TM |
1686 | } else |
1687 | pnfs_ld_handle_read_error(data); | |
cd841605 | 1688 | hdr->mds_ops->rpc_release(data); |
d20581aa BH |
1689 | } |
1690 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
1691 | ||
493292dd TM |
1692 | static void |
1693 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
1694 | struct nfs_read_data *data) | |
1695 | { | |
cd841605 FI |
1696 | struct nfs_pgio_header *hdr = data->header; |
1697 | ||
4db6e0b7 FI |
1698 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
1699 | list_splice_tail_init(&hdr->pages, &desc->pg_list); | |
1700 | nfs_pageio_reset_read_mds(desc); | |
1701 | desc->pg_recoalesce = 1; | |
1702 | } | |
493292dd TM |
1703 | nfs_readdata_release(data); |
1704 | } | |
1705 | ||
64419a9b AA |
1706 | /* |
1707 | * Call the appropriate parallel I/O subsystem read function. | |
1708 | */ | |
493292dd | 1709 | static enum pnfs_try_status |
64419a9b | 1710 | pnfs_try_to_read_data(struct nfs_read_data *rdata, |
493292dd TM |
1711 | const struct rpc_call_ops *call_ops, |
1712 | struct pnfs_layout_segment *lseg) | |
64419a9b | 1713 | { |
cd841605 FI |
1714 | struct nfs_pgio_header *hdr = rdata->header; |
1715 | struct inode *inode = hdr->inode; | |
64419a9b AA |
1716 | struct nfs_server *nfss = NFS_SERVER(inode); |
1717 | enum pnfs_try_status trypnfs; | |
1718 | ||
cd841605 | 1719 | hdr->mds_ops = call_ops; |
64419a9b AA |
1720 | |
1721 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
1722 | __func__, inode->i_ino, rdata->args.count, rdata->args.offset); | |
1723 | ||
1724 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata); | |
4db6e0b7 | 1725 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 1726 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
1727 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1728 | return trypnfs; | |
1729 | } | |
863a3c6c | 1730 | |
493292dd TM |
1731 | static void |
1732 | pnfs_do_multiple_reads(struct nfs_pageio_descriptor *desc, struct list_head *head) | |
1733 | { | |
1734 | struct nfs_read_data *data; | |
1735 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; | |
1736 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
1737 | ||
1738 | desc->pg_lseg = NULL; | |
1739 | while (!list_empty(head)) { | |
1740 | enum pnfs_try_status trypnfs; | |
1741 | ||
4db6e0b7 | 1742 | data = list_first_entry(head, struct nfs_read_data, list); |
493292dd TM |
1743 | list_del_init(&data->list); |
1744 | ||
1745 | trypnfs = pnfs_try_to_read_data(data, call_ops, lseg); | |
1746 | if (trypnfs == PNFS_NOT_ATTEMPTED) | |
1747 | pnfs_read_through_mds(desc, data); | |
1748 | } | |
9369a431 | 1749 | pnfs_put_lseg(lseg); |
493292dd TM |
1750 | } |
1751 | ||
4db6e0b7 FI |
1752 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
1753 | { | |
9369a431 | 1754 | pnfs_put_lseg(hdr->lseg); |
4db6e0b7 FI |
1755 | nfs_readhdr_free(hdr); |
1756 | } | |
89d77c8f | 1757 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
4db6e0b7 | 1758 | |
493292dd TM |
1759 | int |
1760 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
1761 | { | |
4db6e0b7 FI |
1762 | struct nfs_read_header *rhdr; |
1763 | struct nfs_pgio_header *hdr; | |
493292dd TM |
1764 | int ret; |
1765 | ||
4db6e0b7 FI |
1766 | rhdr = nfs_readhdr_alloc(); |
1767 | if (!rhdr) { | |
061ae2ed | 1768 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
4db6e0b7 | 1769 | ret = -ENOMEM; |
9369a431 | 1770 | pnfs_put_lseg(desc->pg_lseg); |
493292dd TM |
1771 | desc->pg_lseg = NULL; |
1772 | return ret; | |
1773 | } | |
4db6e0b7 FI |
1774 | hdr = &rhdr->header; |
1775 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); | |
9369a431 | 1776 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
4db6e0b7 FI |
1777 | atomic_inc(&hdr->refcnt); |
1778 | ret = nfs_generic_pagein(desc, hdr); | |
1779 | if (ret != 0) { | |
9369a431 | 1780 | pnfs_put_lseg(desc->pg_lseg); |
4db6e0b7 | 1781 | desc->pg_lseg = NULL; |
4db6e0b7 FI |
1782 | } else |
1783 | pnfs_do_multiple_reads(desc, &hdr->rpc_list); | |
1784 | if (atomic_dec_and_test(&hdr->refcnt)) | |
061ae2ed | 1785 | hdr->completion_ops->completion(hdr); |
4db6e0b7 | 1786 | return ret; |
493292dd TM |
1787 | } |
1788 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
1789 | ||
863a3c6c | 1790 | /* |
a9bae566 | 1791 | * There can be multiple RW segments. |
863a3c6c | 1792 | */ |
a9bae566 | 1793 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 1794 | { |
a9bae566 | 1795 | struct pnfs_layout_segment *lseg; |
863a3c6c | 1796 | |
a9bae566 PT |
1797 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
1798 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 1799 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
1800 | list_add(&lseg->pls_lc_list, listp); |
1801 | } | |
863a3c6c AA |
1802 | } |
1803 | ||
a073dbff TM |
1804 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
1805 | { | |
1806 | struct pnfs_layout_segment *lseg, *tmp; | |
1807 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
1808 | ||
1809 | /* Matched by references in pnfs_set_layoutcommit */ | |
1810 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
1811 | list_del_init(&lseg->pls_lc_list); | |
1812 | pnfs_put_lseg(lseg); | |
1813 | } | |
1814 | ||
1815 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
1816 | smp_mb__after_clear_bit(); | |
1817 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); | |
1818 | } | |
1819 | ||
1b0ae068 PT |
1820 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
1821 | { | |
b9e028fd | 1822 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
1823 | } |
1824 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
1825 | ||
863a3c6c AA |
1826 | void |
1827 | pnfs_set_layoutcommit(struct nfs_write_data *wdata) | |
1828 | { | |
cd841605 FI |
1829 | struct nfs_pgio_header *hdr = wdata->header; |
1830 | struct inode *inode = hdr->inode; | |
1831 | struct nfs_inode *nfsi = NFS_I(inode); | |
4b8ee2b8 | 1832 | loff_t end_pos = wdata->mds_offset + wdata->res.count; |
79a48a1f | 1833 | bool mark_as_dirty = false; |
863a3c6c | 1834 | |
cd841605 | 1835 | spin_lock(&inode->i_lock); |
863a3c6c | 1836 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
79a48a1f | 1837 | mark_as_dirty = true; |
863a3c6c | 1838 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 1839 | __func__, inode->i_ino); |
863a3c6c | 1840 | } |
cd841605 | 1841 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
a9bae566 | 1842 | /* references matched in nfs4_layoutcommit_release */ |
9369a431 | 1843 | pnfs_get_lseg(hdr->lseg); |
a9bae566 | 1844 | } |
acff5880 PT |
1845 | if (end_pos > nfsi->layout->plh_lwb) |
1846 | nfsi->layout->plh_lwb = end_pos; | |
cd841605 | 1847 | spin_unlock(&inode->i_lock); |
acff5880 | 1848 | dprintk("%s: lseg %p end_pos %llu\n", |
cd841605 | 1849 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
1850 | |
1851 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
1852 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
1853 | if (mark_as_dirty) | |
cd841605 | 1854 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
1855 | } |
1856 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
1857 | ||
db29c089 AA |
1858 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
1859 | { | |
1860 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
1861 | ||
1862 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
1863 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 1864 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
1865 | } |
1866 | ||
de4b15c7 AA |
1867 | /* |
1868 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
1869 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
1870 | * data to disk to allow the server to recover the data if it crashes. | |
1871 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
1872 | * is off, and a COMMIT is sent to a data server, or | |
1873 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
1874 | */ | |
863a3c6c | 1875 | int |
ef311537 | 1876 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c AA |
1877 | { |
1878 | struct nfs4_layoutcommit_data *data; | |
1879 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c AA |
1880 | loff_t end_pos; |
1881 | int status = 0; | |
1882 | ||
1883 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); | |
1884 | ||
de4b15c7 AA |
1885 | if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
1886 | return 0; | |
1887 | ||
863a3c6c AA |
1888 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ |
1889 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
de4b15c7 | 1890 | if (!data) { |
de4b15c7 AA |
1891 | status = -ENOMEM; |
1892 | goto out; | |
1893 | } | |
863a3c6c | 1894 | |
92407e75 PT |
1895 | if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
1896 | goto out_free; | |
1897 | ||
1898 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { | |
1899 | if (!sync) { | |
1900 | status = -EAGAIN; | |
1901 | goto out_free; | |
1902 | } | |
1903 | status = wait_on_bit_lock(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING, | |
1904 | nfs_wait_bit_killable, TASK_KILLABLE); | |
1905 | if (status) | |
1906 | goto out_free; | |
1907 | } | |
1908 | ||
a9bae566 | 1909 | INIT_LIST_HEAD(&data->lseg_list); |
de4b15c7 | 1910 | spin_lock(&inode->i_lock); |
863a3c6c | 1911 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
92407e75 | 1912 | clear_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags); |
863a3c6c | 1913 | spin_unlock(&inode->i_lock); |
92407e75 PT |
1914 | wake_up_bit(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING); |
1915 | goto out_free; | |
863a3c6c | 1916 | } |
a9bae566 PT |
1917 | |
1918 | pnfs_list_write_lseg(inode, &data->lseg_list); | |
863a3c6c | 1919 | |
acff5880 | 1920 | end_pos = nfsi->layout->plh_lwb; |
acff5880 | 1921 | nfsi->layout->plh_lwb = 0; |
863a3c6c | 1922 | |
f597c537 | 1923 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
1924 | spin_unlock(&inode->i_lock); |
1925 | ||
1926 | data->args.inode = inode; | |
9fa40758 | 1927 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
1928 | nfs_fattr_init(&data->fattr); |
1929 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
1930 | data->res.fattr = &data->fattr; | |
1931 | data->args.lastbytewritten = end_pos - 1; | |
1932 | data->res.server = NFS_SERVER(inode); | |
1933 | ||
1934 | status = nfs4_proc_layoutcommit(data, sync); | |
1935 | out: | |
92407e75 PT |
1936 | if (status) |
1937 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
1938 | dprintk("<-- %s status %d\n", __func__, status); |
1939 | return status; | |
92407e75 PT |
1940 | out_free: |
1941 | kfree(data); | |
1942 | goto out; | |
863a3c6c | 1943 | } |
82be417a AA |
1944 | |
1945 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) | |
1946 | { | |
1947 | struct nfs4_threshold *thp; | |
1948 | ||
1949 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
1950 | if (!thp) { | |
1951 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
1952 | return NULL; | |
1953 | } | |
1954 | return thp; | |
1955 | } |