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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" |
cc668ab3 | 36 | #include "nfs4trace.h" |
40dd4b7a | 37 | #include "delegation.h" |
8733408d | 38 | #include "nfs42.h" |
85e174ba RL |
39 | |
40 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 41 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 42 | |
02c35fca FI |
43 | /* Locking: |
44 | * | |
45 | * pnfs_spinlock: | |
46 | * protects pnfs_modules_tbl. | |
47 | */ | |
48 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
49 | ||
50 | /* | |
51 | * pnfs_modules_tbl holds all pnfs modules | |
52 | */ | |
53 | static LIST_HEAD(pnfs_modules_tbl); | |
54 | ||
13c13a6a | 55 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo); |
aa1e0e3a | 56 | |
02c35fca FI |
57 | /* Return the registered pnfs layout driver module matching given id */ |
58 | static struct pnfs_layoutdriver_type * | |
59 | find_pnfs_driver_locked(u32 id) | |
60 | { | |
61 | struct pnfs_layoutdriver_type *local; | |
62 | ||
63 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
64 | if (local->id == id) | |
65 | goto out; | |
66 | local = NULL; | |
67 | out: | |
68 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
69 | return local; | |
70 | } | |
71 | ||
85e174ba RL |
72 | static struct pnfs_layoutdriver_type * |
73 | find_pnfs_driver(u32 id) | |
74 | { | |
02c35fca FI |
75 | struct pnfs_layoutdriver_type *local; |
76 | ||
77 | spin_lock(&pnfs_spinlock); | |
78 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
79 | if (local != NULL && !try_module_get(local->owner)) { |
80 | dprintk("%s: Could not grab reference on module\n", __func__); | |
81 | local = NULL; | |
82 | } | |
02c35fca FI |
83 | spin_unlock(&pnfs_spinlock); |
84 | return local; | |
85e174ba RL |
85 | } |
86 | ||
87 | void | |
88 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
89 | { | |
738fd0f3 BH |
90 | if (nfss->pnfs_curr_ld) { |
91 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
92 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
93 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
94 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
95 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 96 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 97 | } |
85e174ba RL |
98 | nfss->pnfs_curr_ld = NULL; |
99 | } | |
100 | ||
101 | /* | |
102 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
103 | * Currently only one pNFS layout driver per filesystem is supported. | |
104 | * | |
105 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
106 | */ | |
107 | void | |
738fd0f3 BH |
108 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
109 | u32 id) | |
85e174ba RL |
110 | { |
111 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
112 | ||
113 | if (id == 0) | |
114 | goto out_no_driver; | |
115 | if (!(server->nfs_client->cl_exchange_flags & | |
116 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
a030889a WAA |
117 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
118 | __func__, id, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
119 | goto out_no_driver; |
120 | } | |
121 | ld_type = find_pnfs_driver(id); | |
122 | if (!ld_type) { | |
123 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
124 | ld_type = find_pnfs_driver(id); | |
125 | if (!ld_type) { | |
126 | dprintk("%s: No pNFS module found for %u.\n", | |
127 | __func__, id); | |
128 | goto out_no_driver; | |
129 | } | |
130 | } | |
131 | server->pnfs_curr_ld = ld_type; | |
738fd0f3 BH |
132 | if (ld_type->set_layoutdriver |
133 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
134 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
135 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
136 | module_put(ld_type->owner); |
137 | goto out_no_driver; | |
138 | } | |
2a4c8994 TM |
139 | /* Bump the MDS count */ |
140 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 141 | |
85e174ba RL |
142 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
143 | return; | |
144 | ||
145 | out_no_driver: | |
146 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
147 | server->pnfs_curr_ld = NULL; | |
148 | } | |
02c35fca FI |
149 | |
150 | int | |
151 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
152 | { | |
153 | int status = -EINVAL; | |
154 | struct pnfs_layoutdriver_type *tmp; | |
155 | ||
156 | if (ld_type->id == 0) { | |
a030889a | 157 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
158 | return status; |
159 | } | |
b1f69b75 | 160 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 161 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
162 | "alloc_lseg and free_lseg.\n", __func__); |
163 | return status; | |
164 | } | |
02c35fca FI |
165 | |
166 | spin_lock(&pnfs_spinlock); | |
167 | tmp = find_pnfs_driver_locked(ld_type->id); | |
168 | if (!tmp) { | |
169 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
170 | status = 0; | |
171 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
172 | ld_type->name); | |
173 | } else { | |
a030889a | 174 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
175 | __func__, ld_type->id); |
176 | } | |
177 | spin_unlock(&pnfs_spinlock); | |
178 | ||
179 | return status; | |
180 | } | |
181 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
182 | ||
183 | void | |
184 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
185 | { | |
186 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
187 | spin_lock(&pnfs_spinlock); | |
188 | list_del(&ld_type->pnfs_tblid); | |
189 | spin_unlock(&pnfs_spinlock); | |
190 | } | |
191 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 192 | |
b1f69b75 AA |
193 | /* |
194 | * pNFS client layout cache | |
195 | */ | |
196 | ||
cc6e5340 | 197 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 198 | void |
70c3bd2b | 199 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 200 | { |
cc6e5340 | 201 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
202 | } |
203 | ||
636fb9c8 BH |
204 | static struct pnfs_layout_hdr * |
205 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
206 | { | |
207 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 208 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
209 | } |
210 | ||
211 | static void | |
212 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
213 | { | |
9c626381 TM |
214 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
215 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
216 | ||
217 | if (!list_empty(&lo->plh_layouts)) { | |
218 | struct nfs_client *clp = server->nfs_client; | |
219 | ||
220 | spin_lock(&clp->cl_lock); | |
221 | list_del_init(&lo->plh_layouts); | |
222 | spin_unlock(&clp->cl_lock); | |
223 | } | |
9fa40758 | 224 | put_rpccred(lo->plh_lc_cred); |
57934278 | 225 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
226 | } |
227 | ||
e5e94017 | 228 | static void |
6622c3ea | 229 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 230 | { |
bb346f63 | 231 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 232 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
233 | nfsi->layout = NULL; |
234 | /* Reset MDS Threshold I/O counters */ | |
235 | nfsi->write_io = 0; | |
236 | nfsi->read_io = 0; | |
e5e94017 BH |
237 | } |
238 | ||
b1f69b75 | 239 | void |
70c3bd2b | 240 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 241 | { |
cc6e5340 FI |
242 | struct inode *inode = lo->plh_inode; |
243 | ||
13c13a6a TM |
244 | pnfs_layoutreturn_before_put_layout_hdr(lo); |
245 | ||
cc6e5340 | 246 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
566f8737 PT |
247 | if (!list_empty(&lo->plh_segs)) |
248 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 249 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 250 | spin_unlock(&inode->i_lock); |
6622c3ea | 251 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 252 | } |
974cec8c AA |
253 | } |
254 | ||
b9e028fd TM |
255 | static int |
256 | pnfs_iomode_to_fail_bit(u32 iomode) | |
257 | { | |
258 | return iomode == IOMODE_RW ? | |
259 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
260 | } | |
261 | ||
262 | static void | |
3e621214 | 263 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 264 | { |
25c75333 | 265 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 266 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
267 | atomic_inc(&lo->plh_refcount); |
268 | } | |
269 | ||
270 | static void | |
271 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
272 | { | |
273 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
274 | atomic_dec(&lo->plh_refcount); | |
275 | } | |
276 | ||
277 | static void | |
278 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
279 | { | |
280 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
281 | struct pnfs_layout_range range = { |
282 | .iomode = iomode, | |
283 | .offset = 0, | |
284 | .length = NFS4_MAX_UINT64, | |
285 | }; | |
286 | LIST_HEAD(head); | |
3e621214 TM |
287 | |
288 | spin_lock(&inode->i_lock); | |
289 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 290 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 291 | spin_unlock(&inode->i_lock); |
115ce575 | 292 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
293 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
294 | iomode == IOMODE_RW ? "RW" : "READ"); | |
295 | } | |
296 | ||
297 | static bool | |
298 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
299 | { | |
25c75333 | 300 | unsigned long start, end; |
3e621214 TM |
301 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
302 | ||
303 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
304 | return false; |
305 | end = jiffies; | |
306 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
307 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
308 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 309 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
310 | return false; |
311 | } | |
312 | return true; | |
b9e028fd TM |
313 | } |
314 | ||
974cec8c AA |
315 | static void |
316 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
317 | { | |
566052c5 | 318 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 319 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
320 | atomic_set(&lseg->pls_refcount, 1); |
321 | smp_mb(); | |
322 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 323 | lseg->pls_layout = lo; |
974cec8c AA |
324 | } |
325 | ||
905ca191 | 326 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 327 | { |
b7edfaa1 | 328 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 329 | |
b1f69b75 | 330 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
331 | } |
332 | ||
d684d2ae | 333 | static void |
57036a37 TM |
334 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
335 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 336 | { |
57036a37 | 337 | struct inode *inode = lo->plh_inode; |
d684d2ae | 338 | |
d20581aa | 339 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 340 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
341 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
342 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
343 | if (list_empty(&lo->plh_segs)) |
344 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
345 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
346 | } | |
347 | ||
bae724ef | 348 | void |
9369a431 | 349 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 350 | { |
57036a37 | 351 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
352 | struct inode *inode; |
353 | ||
354 | if (!lseg) | |
355 | return; | |
356 | ||
4541d16c FI |
357 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
358 | atomic_read(&lseg->pls_refcount), | |
359 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
4ef2e4f8 | 360 | |
57036a37 TM |
361 | lo = lseg->pls_layout; |
362 | inode = lo->plh_inode; | |
4ef2e4f8 | 363 | |
d684d2ae | 364 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
faa4a54f TM |
365 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
366 | spin_unlock(&inode->i_lock); | |
367 | return; | |
368 | } | |
8f0d27dc | 369 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 TM |
370 | pnfs_layout_remove_lseg(lo, lseg); |
371 | spin_unlock(&inode->i_lock); | |
372 | pnfs_free_lseg(lseg); | |
373 | pnfs_put_layout_hdr(lo); | |
4541d16c | 374 | } |
4541d16c | 375 | } |
9369a431 | 376 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 377 | |
6543f803 | 378 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
379 | { |
380 | struct pnfs_layout_segment *lseg; | |
6543f803 | 381 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
382 | |
383 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 384 | lo = lseg->pls_layout; |
e6cf82d1 | 385 | |
6543f803 TM |
386 | pnfs_free_lseg(lseg); |
387 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
388 | } |
389 | ||
6543f803 | 390 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 391 | { |
6543f803 | 392 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
393 | schedule_work(&lseg->pls_work); |
394 | } | |
6543f803 TM |
395 | |
396 | void | |
397 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
398 | { | |
399 | if (!lseg) | |
400 | return; | |
401 | ||
402 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
403 | ||
404 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
405 | atomic_read(&lseg->pls_refcount), | |
406 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
407 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
408 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
faa4a54f TM |
409 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) |
410 | return; | |
6543f803 TM |
411 | pnfs_get_layout_hdr(lo); |
412 | pnfs_layout_remove_lseg(lo, lseg); | |
413 | pnfs_free_lseg_async(lseg); | |
414 | } | |
415 | } | |
416 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 417 | |
3cb2df17 | 418 | static u64 |
fb3296eb BH |
419 | end_offset(u64 start, u64 len) |
420 | { | |
421 | u64 end; | |
422 | ||
423 | end = start + len; | |
424 | return end >= start ? end : NFS4_MAX_UINT64; | |
425 | } | |
426 | ||
fb3296eb BH |
427 | /* |
428 | * is l2 fully contained in l1? | |
429 | * start1 end1 | |
430 | * [----------------------------------) | |
431 | * start2 end2 | |
432 | * [----------------) | |
433 | */ | |
3cb2df17 | 434 | static bool |
7dc0ac70 | 435 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 436 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
437 | { |
438 | u64 start1 = l1->offset; | |
439 | u64 end1 = end_offset(start1, l1->length); | |
440 | u64 start2 = l2->offset; | |
441 | u64 end2 = end_offset(start2, l2->length); | |
442 | ||
443 | return (start1 <= start2) && (end1 >= end2); | |
444 | } | |
445 | ||
446 | /* | |
447 | * is l1 and l2 intersecting? | |
448 | * start1 end1 | |
449 | * [----------------------------------) | |
450 | * start2 end2 | |
451 | * [----------------) | |
452 | */ | |
3cb2df17 | 453 | static bool |
7dc0ac70 | 454 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 455 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
456 | { |
457 | u64 start1 = l1->offset; | |
458 | u64 end1 = end_offset(start1, l1->length); | |
459 | u64 start2 = l2->offset; | |
460 | u64 end2 = end_offset(start2, l2->length); | |
461 | ||
462 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
463 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
464 | } | |
465 | ||
4541d16c | 466 | static bool |
3cb2df17 TM |
467 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
468 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 469 | { |
778b5502 BH |
470 | return (recall_range->iomode == IOMODE_ANY || |
471 | lseg_range->iomode == recall_range->iomode) && | |
7dc0ac70 | 472 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
974cec8c AA |
473 | } |
474 | ||
24956804 TM |
475 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
476 | struct list_head *tmp_list) | |
477 | { | |
478 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
479 | return false; | |
480 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
481 | list_add(&lseg->pls_list, tmp_list); | |
482 | return true; | |
483 | } | |
484 | ||
4541d16c FI |
485 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
486 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
487 | struct list_head *tmp_list) | |
488 | { | |
489 | int rv = 0; | |
490 | ||
491 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
492 | /* Remove the reference keeping the lseg in the | |
493 | * list. It will now be removed when all | |
494 | * outstanding io is finished. | |
495 | */ | |
d684d2ae FI |
496 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
497 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 498 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 499 | rv = 1; |
4541d16c FI |
500 | } |
501 | return rv; | |
502 | } | |
503 | ||
504 | /* Returns count of number of matching invalid lsegs remaining in list | |
505 | * after call. | |
506 | */ | |
43f1b3da | 507 | int |
49a85061 | 508 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 509 | struct list_head *tmp_list, |
506c0d68 | 510 | const struct pnfs_layout_range *recall_range) |
974cec8c AA |
511 | { |
512 | struct pnfs_layout_segment *lseg, *next; | |
71b39854 | 513 | int remaining = 0; |
974cec8c AA |
514 | |
515 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
516 | ||
8006bfba | 517 | if (list_empty(&lo->plh_segs)) |
38511722 | 518 | return 0; |
4541d16c | 519 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
520 | if (!recall_range || |
521 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
522 | dprintk("%s: freeing lseg %p iomode %d " |
523 | "offset %llu length %llu\n", __func__, | |
524 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
525 | lseg->pls_range.length); | |
71b39854 TM |
526 | if (!mark_lseg_invalid(lseg, tmp_list)) |
527 | remaining++; | |
4541d16c | 528 | } |
71b39854 TM |
529 | dprintk("%s:Return %i\n", __func__, remaining); |
530 | return remaining; | |
974cec8c AA |
531 | } |
532 | ||
f49f9baa | 533 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 534 | void |
4541d16c | 535 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 536 | { |
4541d16c | 537 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
538 | |
539 | if (list_empty(free_me)) | |
540 | return; | |
541 | ||
4541d16c | 542 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 543 | list_del(&lseg->pls_list); |
905ca191 | 544 | pnfs_free_lseg(lseg); |
974cec8c AA |
545 | } |
546 | } | |
547 | ||
e5e94017 BH |
548 | void |
549 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
550 | { | |
551 | struct pnfs_layout_hdr *lo; | |
974cec8c | 552 | LIST_HEAD(tmp_list); |
e5e94017 BH |
553 | |
554 | spin_lock(&nfsi->vfs_inode.i_lock); | |
555 | lo = nfsi->layout; | |
556 | if (lo) { | |
38511722 | 557 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
49a85061 | 558 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
3e621214 TM |
559 | pnfs_get_layout_hdr(lo); |
560 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); | |
561 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
562 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
563 | pnfs_free_lseg_list(&tmp_list); | |
564 | pnfs_put_layout_hdr(lo); | |
565 | } else | |
566 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 567 | } |
041245c8 | 568 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 569 | |
fd9a8d71 TM |
570 | static bool |
571 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
572 | struct list_head *layout_list) | |
974cec8c AA |
573 | { |
574 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 575 | bool ret = false; |
974cec8c | 576 | |
fd9a8d71 TM |
577 | spin_lock(&inode->i_lock); |
578 | lo = NFS_I(inode)->layout; | |
579 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
580 | pnfs_get_layout_hdr(lo); | |
581 | list_add(&lo->plh_bulk_destroy, layout_list); | |
582 | ret = true; | |
583 | } | |
584 | spin_unlock(&inode->i_lock); | |
585 | return ret; | |
586 | } | |
587 | ||
588 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
589 | static int | |
590 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
591 | struct nfs_server *server, | |
592 | struct list_head *layout_list) | |
593 | { | |
594 | struct pnfs_layout_hdr *lo, *next; | |
595 | struct inode *inode; | |
596 | ||
597 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
598 | inode = igrab(lo->plh_inode); | |
599 | if (inode == NULL) | |
600 | continue; | |
601 | list_del_init(&lo->plh_layouts); | |
602 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
603 | continue; | |
604 | rcu_read_unlock(); | |
605 | spin_unlock(&clp->cl_lock); | |
606 | iput(inode); | |
607 | spin_lock(&clp->cl_lock); | |
608 | rcu_read_lock(); | |
609 | return -EAGAIN; | |
610 | } | |
611 | return 0; | |
612 | } | |
613 | ||
614 | static int | |
615 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
616 | bool is_bulk_recall) | |
617 | { | |
618 | struct pnfs_layout_hdr *lo; | |
619 | struct inode *inode; | |
620 | struct pnfs_layout_range range = { | |
621 | .iomode = IOMODE_ANY, | |
622 | .offset = 0, | |
623 | .length = NFS4_MAX_UINT64, | |
624 | }; | |
625 | LIST_HEAD(lseg_list); | |
626 | int ret = 0; | |
627 | ||
628 | while (!list_empty(layout_list)) { | |
629 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
630 | plh_bulk_destroy); | |
631 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
632 | lo->plh_inode->i_ino); | |
633 | inode = lo->plh_inode; | |
7c5d1875 CH |
634 | |
635 | pnfs_layoutcommit_inode(inode, false); | |
636 | ||
fd9a8d71 TM |
637 | spin_lock(&inode->i_lock); |
638 | list_del_init(&lo->plh_bulk_destroy); | |
639 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ | |
640 | if (is_bulk_recall) | |
641 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
642 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) | |
643 | ret = -EAGAIN; | |
644 | spin_unlock(&inode->i_lock); | |
645 | pnfs_free_lseg_list(&lseg_list); | |
b20135d0 TM |
646 | /* Free all lsegs that are attached to commit buckets */ |
647 | nfs_commit_inode(inode, 0); | |
fd9a8d71 TM |
648 | pnfs_put_layout_hdr(lo); |
649 | iput(inode); | |
650 | } | |
651 | return ret; | |
652 | } | |
653 | ||
654 | int | |
655 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
656 | struct nfs_fsid *fsid, | |
657 | bool is_recall) | |
658 | { | |
659 | struct nfs_server *server; | |
660 | LIST_HEAD(layout_list); | |
c47abcf8 | 661 | |
974cec8c | 662 | spin_lock(&clp->cl_lock); |
6382a441 | 663 | rcu_read_lock(); |
fd9a8d71 | 664 | restart: |
6382a441 | 665 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
666 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
667 | continue; | |
668 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
669 | server, | |
670 | &layout_list) != 0) | |
671 | goto restart; | |
6382a441 WAA |
672 | } |
673 | rcu_read_unlock(); | |
974cec8c AA |
674 | spin_unlock(&clp->cl_lock); |
675 | ||
fd9a8d71 TM |
676 | if (list_empty(&layout_list)) |
677 | return 0; | |
678 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
679 | } | |
680 | ||
681 | int | |
682 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
683 | bool is_recall) | |
684 | { | |
685 | struct nfs_server *server; | |
686 | LIST_HEAD(layout_list); | |
687 | ||
688 | spin_lock(&clp->cl_lock); | |
689 | rcu_read_lock(); | |
690 | restart: | |
691 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
692 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
693 | server, | |
694 | &layout_list) != 0) | |
695 | goto restart; | |
974cec8c | 696 | } |
fd9a8d71 TM |
697 | rcu_read_unlock(); |
698 | spin_unlock(&clp->cl_lock); | |
699 | ||
700 | if (list_empty(&layout_list)) | |
701 | return 0; | |
702 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
703 | } | |
704 | ||
705 | /* | |
706 | * Called by the state manger to remove all layouts established under an | |
707 | * expired lease. | |
708 | */ | |
709 | void | |
710 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
711 | { | |
712 | nfs4_deviceid_mark_client_invalid(clp); | |
713 | nfs4_deviceid_purge_client(clp); | |
714 | ||
715 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
716 | } |
717 | ||
5a65503f TM |
718 | /* |
719 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
720 | * taking into account wraparound issues. | |
721 | */ | |
722 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
723 | { | |
2c64c57d | 724 | return (s32)(s1 - s2) > 0; |
5a65503f TM |
725 | } |
726 | ||
fd6002e9 | 727 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
728 | void |
729 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
730 | bool update_barrier) | |
b1f69b75 | 731 | { |
22aaf714 TM |
732 | u32 oldseq, newseq, new_barrier; |
733 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 734 | |
2d2f24ad TM |
735 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
736 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 737 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 738 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 739 | if (update_barrier) { |
22aaf714 | 740 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
741 | } else { |
742 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 743 | * "close" to the current seqids. |
43f1b3da | 744 | */ |
22aaf714 | 745 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 746 | } |
22aaf714 TM |
747 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
748 | lo->plh_barrier = new_barrier; | |
43f1b3da | 749 | } |
b1f69b75 AA |
750 | } |
751 | ||
cf7d63f1 | 752 | static bool |
19c54aba TM |
753 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
754 | const nfs4_stateid *stateid) | |
43f1b3da | 755 | { |
19c54aba | 756 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 757 | |
19c54aba TM |
758 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
759 | } | |
760 | ||
761 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
762 | static bool | |
e1c06f80 | 763 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo) |
19c54aba | 764 | { |
f7e8917a | 765 | return lo->plh_block_lgets || |
e1c06f80 | 766 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
cf7d63f1 FI |
767 | } |
768 | ||
fd6002e9 FI |
769 | int |
770 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
506c0d68 | 771 | const struct pnfs_layout_range *range, |
fd6002e9 | 772 | struct nfs4_state *open_state) |
b1f69b75 | 773 | { |
fd6002e9 | 774 | int status = 0; |
974cec8c | 775 | |
b1f69b75 | 776 | dprintk("--> %s\n", __func__); |
fd6002e9 | 777 | spin_lock(&lo->plh_inode->i_lock); |
e1c06f80 | 778 | if (pnfs_layoutgets_blocked(lo)) { |
cf7d63f1 | 779 | status = -EAGAIN; |
5d422301 TM |
780 | } else if (!nfs4_valid_open_stateid(open_state)) { |
781 | status = -EBADF; | |
47abadef CH |
782 | } else if (list_empty(&lo->plh_segs) || |
783 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { | |
fd6002e9 FI |
784 | int seq; |
785 | ||
786 | do { | |
787 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 788 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
789 | } while (read_seqretry(&open_state->seqlock, seq)); |
790 | } else | |
f597c537 | 791 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 792 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 793 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 794 | return status; |
b1f69b75 AA |
795 | } |
796 | ||
797 | /* | |
798 | * Get layout from server. | |
799 | * for now, assume that whole file layouts are requested. | |
800 | * arg->offset: 0 | |
801 | * arg->length: all ones | |
802 | */ | |
e5e94017 BH |
803 | static struct pnfs_layout_segment * |
804 | send_layoutget(struct pnfs_layout_hdr *lo, | |
805 | struct nfs_open_context *ctx, | |
e144e539 | 806 | const struct pnfs_layout_range *range, |
a75b9df9 | 807 | gfp_t gfp_flags) |
e5e94017 | 808 | { |
b7edfaa1 | 809 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
810 | struct nfs_server *server = NFS_SERVER(ino); |
811 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 812 | struct pnfs_layout_segment *lseg; |
2d89a1d3 | 813 | loff_t i_size; |
b1f69b75 AA |
814 | |
815 | dprintk("--> %s\n", __func__); | |
e5e94017 | 816 | |
4f2e9dce JL |
817 | /* |
818 | * Synchronously retrieve layout information from server and | |
819 | * store in lseg. If we race with a concurrent seqid morphing | |
820 | * op, then re-send the LAYOUTGET. | |
821 | */ | |
822 | do { | |
823 | lgp = kzalloc(sizeof(*lgp), gfp_flags); | |
824 | if (lgp == NULL) | |
825 | return NULL; | |
826 | ||
827 | i_size = i_size_read(ino); | |
828 | ||
829 | lgp->args.minlength = PAGE_CACHE_SIZE; | |
830 | if (lgp->args.minlength > range->length) | |
831 | lgp->args.minlength = range->length; | |
832 | if (range->iomode == IOMODE_READ) { | |
833 | if (range->offset >= i_size) | |
834 | lgp->args.minlength = 0; | |
835 | else if (i_size - range->offset < lgp->args.minlength) | |
836 | lgp->args.minlength = i_size - range->offset; | |
837 | } | |
838 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; | |
e144e539 | 839 | pnfs_copy_range(&lgp->args.range, range); |
4f2e9dce JL |
840 | lgp->args.type = server->pnfs_curr_ld->id; |
841 | lgp->args.inode = ino; | |
842 | lgp->args.ctx = get_nfs_open_context(ctx); | |
843 | lgp->gfp_flags = gfp_flags; | |
844 | lgp->cred = lo->plh_lc_cred; | |
35124a09 | 845 | |
4f2e9dce JL |
846 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
847 | } while (lseg == ERR_PTR(-EAGAIN)); | |
2d89a1d3 | 848 | |
0bcbf039 PT |
849 | if (IS_ERR(lseg) && !nfs_error_is_fatal(PTR_ERR(lseg))) |
850 | lseg = NULL; | |
851 | else | |
d67ae825 TH |
852 | pnfs_layout_clear_fail_bit(lo, |
853 | pnfs_iomode_to_fail_bit(range->iomode)); | |
35124a09 | 854 | |
974cec8c AA |
855 | return lseg; |
856 | } | |
857 | ||
24956804 TM |
858 | static void pnfs_clear_layoutcommit(struct inode *inode, |
859 | struct list_head *head) | |
860 | { | |
861 | struct nfs_inode *nfsi = NFS_I(inode); | |
862 | struct pnfs_layout_segment *lseg, *tmp; | |
863 | ||
864 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
865 | return; | |
866 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
867 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
868 | continue; | |
869 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
870 | } | |
871 | } | |
872 | ||
d67ae825 TH |
873 | void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
874 | { | |
875 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
876 | smp_mb__after_atomic(); | |
877 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
7f27392c | 878 | rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); |
d67ae825 TH |
879 | } |
880 | ||
13c13a6a TM |
881 | static bool |
882 | pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo) | |
883 | { | |
884 | if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
885 | return false; | |
886 | lo->plh_return_iomode = 0; | |
887 | pnfs_get_layout_hdr(lo); | |
2370abda | 888 | clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); |
13c13a6a TM |
889 | return true; |
890 | } | |
891 | ||
f40eb5d0 | 892 | static int |
ed429d6b | 893 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid, |
6c16605d | 894 | enum pnfs_iomode iomode, bool sync) |
f40eb5d0 PT |
895 | { |
896 | struct inode *ino = lo->plh_inode; | |
897 | struct nfs4_layoutreturn *lrp; | |
898 | int status = 0; | |
899 | ||
e4af440a | 900 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
901 | if (unlikely(lrp == NULL)) { |
902 | status = -ENOMEM; | |
903 | spin_lock(&ino->i_lock); | |
d67ae825 | 904 | pnfs_clear_layoutreturn_waitbit(lo); |
f40eb5d0 PT |
905 | spin_unlock(&ino->i_lock); |
906 | pnfs_put_layout_hdr(lo); | |
907 | goto out; | |
908 | } | |
909 | ||
ed429d6b | 910 | nfs4_stateid_copy(&lrp->args.stateid, stateid); |
f40eb5d0 PT |
911 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
912 | lrp->args.inode = ino; | |
15eb67c1 PT |
913 | lrp->args.range.iomode = iomode; |
914 | lrp->args.range.offset = 0; | |
915 | lrp->args.range.length = NFS4_MAX_UINT64; | |
f40eb5d0 PT |
916 | lrp->args.layout = lo; |
917 | lrp->clp = NFS_SERVER(ino)->nfs_client; | |
918 | lrp->cred = lo->plh_lc_cred; | |
919 | ||
6c16605d | 920 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
921 | out: |
922 | dprintk("<-- %s status: %d\n", __func__, status); | |
923 | return status; | |
924 | } | |
925 | ||
13c13a6a TM |
926 | /* Return true if layoutreturn is needed */ |
927 | static bool | |
928 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo) | |
929 | { | |
930 | struct pnfs_layout_segment *s; | |
931 | ||
2370abda | 932 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
933 | return false; |
934 | ||
935 | /* Defer layoutreturn until all lsegs are done */ | |
936 | list_for_each_entry(s, &lo->plh_segs, pls_list) { | |
937 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) | |
938 | return false; | |
939 | } | |
940 | ||
941 | return true; | |
942 | } | |
943 | ||
944 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo) | |
945 | { | |
946 | struct inode *inode= lo->plh_inode; | |
947 | ||
2370abda | 948 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
949 | return; |
950 | spin_lock(&inode->i_lock); | |
951 | if (pnfs_layout_need_return(lo)) { | |
952 | nfs4_stateid stateid; | |
953 | enum pnfs_iomode iomode; | |
954 | bool send; | |
955 | ||
956 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); | |
957 | iomode = lo->plh_return_iomode; | |
958 | send = pnfs_prepare_layoutreturn(lo); | |
959 | spin_unlock(&inode->i_lock); | |
960 | if (send) { | |
961 | /* Send an async layoutreturn so we dont deadlock */ | |
962 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
963 | } | |
964 | } else | |
965 | spin_unlock(&inode->i_lock); | |
966 | } | |
967 | ||
293b3b06 AA |
968 | /* |
969 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
970 | * when the layout segment list is empty. | |
971 | * | |
972 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
973 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
974 | * deviceid is marked invalid. | |
975 | */ | |
cbe82603 BH |
976 | int |
977 | _pnfs_return_layout(struct inode *ino) | |
978 | { | |
979 | struct pnfs_layout_hdr *lo = NULL; | |
980 | struct nfs_inode *nfsi = NFS_I(ino); | |
981 | LIST_HEAD(tmp_list); | |
cbe82603 | 982 | nfs4_stateid stateid; |
293b3b06 | 983 | int status = 0, empty; |
7f27392c | 984 | bool send; |
cbe82603 | 985 | |
366d5052 | 986 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
987 | |
988 | spin_lock(&ino->i_lock); | |
989 | lo = nfsi->layout; | |
e5929f3c | 990 | if (!lo) { |
cbe82603 | 991 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
992 | dprintk("NFS: %s no layout to return\n", __func__); |
993 | goto out; | |
cbe82603 | 994 | } |
50f563ef | 995 | nfs4_stateid_copy(&stateid, &nfsi->layout->plh_stateid); |
cbe82603 | 996 | /* Reference matched in nfs4_layoutreturn_release */ |
70c3bd2b | 997 | pnfs_get_layout_hdr(lo); |
293b3b06 | 998 | empty = list_empty(&lo->plh_segs); |
24956804 | 999 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 1000 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
c88953d8 CH |
1001 | |
1002 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
1003 | struct pnfs_layout_range range = { | |
1004 | .iomode = IOMODE_ANY, | |
1005 | .offset = 0, | |
1006 | .length = NFS4_MAX_UINT64, | |
1007 | }; | |
1008 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1009 | } | |
1010 | ||
293b3b06 AA |
1011 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
1012 | if (empty) { | |
1013 | spin_unlock(&ino->i_lock); | |
293b3b06 | 1014 | dprintk("NFS: %s no layout segments to return\n", __func__); |
7f27392c | 1015 | goto out_put_layout_hdr; |
293b3b06 | 1016 | } |
47abadef CH |
1017 | |
1018 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
7f27392c | 1019 | send = pnfs_prepare_layoutreturn(lo); |
cbe82603 BH |
1020 | spin_unlock(&ino->i_lock); |
1021 | pnfs_free_lseg_list(&tmp_list); | |
7f27392c | 1022 | if (send) |
ed429d6b | 1023 | status = pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
7f27392c TM |
1024 | out_put_layout_hdr: |
1025 | pnfs_put_layout_hdr(lo); | |
cbe82603 BH |
1026 | out: |
1027 | dprintk("<-- %s status: %d\n", __func__, status); | |
1028 | return status; | |
1029 | } | |
0a57cdac | 1030 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 1031 | |
24028672 TM |
1032 | int |
1033 | pnfs_commit_and_return_layout(struct inode *inode) | |
1034 | { | |
1035 | struct pnfs_layout_hdr *lo; | |
1036 | int ret; | |
1037 | ||
1038 | spin_lock(&inode->i_lock); | |
1039 | lo = NFS_I(inode)->layout; | |
1040 | if (lo == NULL) { | |
1041 | spin_unlock(&inode->i_lock); | |
1042 | return 0; | |
1043 | } | |
1044 | pnfs_get_layout_hdr(lo); | |
1045 | /* Block new layoutgets and read/write to ds */ | |
1046 | lo->plh_block_lgets++; | |
1047 | spin_unlock(&inode->i_lock); | |
1048 | filemap_fdatawait(inode->i_mapping); | |
1049 | ret = pnfs_layoutcommit_inode(inode, true); | |
1050 | if (ret == 0) | |
1051 | ret = _pnfs_return_layout(inode); | |
1052 | spin_lock(&inode->i_lock); | |
1053 | lo->plh_block_lgets--; | |
1054 | spin_unlock(&inode->i_lock); | |
1055 | pnfs_put_layout_hdr(lo); | |
1056 | return ret; | |
1057 | } | |
1058 | ||
f7e8917a FI |
1059 | bool pnfs_roc(struct inode *ino) |
1060 | { | |
40dd4b7a TM |
1061 | struct nfs_inode *nfsi = NFS_I(ino); |
1062 | struct nfs_open_context *ctx; | |
1063 | struct nfs4_state *state; | |
f7e8917a FI |
1064 | struct pnfs_layout_hdr *lo; |
1065 | struct pnfs_layout_segment *lseg, *tmp; | |
193e3aa2 | 1066 | nfs4_stateid stateid; |
f7e8917a | 1067 | LIST_HEAD(tmp_list); |
e755d638 | 1068 | bool found = false, layoutreturn = false, roc = false; |
f7e8917a FI |
1069 | |
1070 | spin_lock(&ino->i_lock); | |
40dd4b7a | 1071 | lo = nfsi->layout; |
3976143b | 1072 | if (!lo || test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
40dd4b7a TM |
1073 | goto out_noroc; |
1074 | ||
e755d638 | 1075 | /* no roc if we hold a delegation */ |
40dd4b7a TM |
1076 | if (nfs4_check_delegation(ino, FMODE_READ)) |
1077 | goto out_noroc; | |
1078 | ||
1079 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1080 | state = ctx->state; | |
1081 | /* Don't return layout if there is open file state */ | |
1082 | if (state != NULL && state->state != 0) | |
1083 | goto out_noroc; | |
1084 | } | |
1085 | ||
50f563ef | 1086 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
e755d638 | 1087 | /* always send layoutreturn if being marked so */ |
2370abda | 1088 | if (test_and_clear_bit(NFS_LAYOUT_RETURN_REQUESTED, |
e755d638 PT |
1089 | &lo->plh_flags)) |
1090 | layoutreturn = pnfs_prepare_layoutreturn(lo); | |
1091 | ||
f7e8917a | 1092 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
e755d638 PT |
1093 | /* If we are sending layoutreturn, invalidate all valid lsegs */ |
1094 | if (layoutreturn || test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
f7e8917a FI |
1095 | mark_lseg_invalid(lseg, &tmp_list); |
1096 | found = true; | |
1097 | } | |
500d701f | 1098 | /* ROC in two conditions: |
e755d638 PT |
1099 | * 1. there are ROC lsegs |
1100 | * 2. we don't send layoutreturn | |
e755d638 | 1101 | */ |
500d701f PT |
1102 | if (found && !layoutreturn) { |
1103 | /* lo ref dropped in pnfs_roc_release() */ | |
1104 | pnfs_get_layout_hdr(lo); | |
e755d638 | 1105 | roc = true; |
500d701f | 1106 | } |
f7e8917a | 1107 | |
40dd4b7a | 1108 | out_noroc: |
f7e8917a | 1109 | spin_unlock(&ino->i_lock); |
e755d638 PT |
1110 | pnfs_free_lseg_list(&tmp_list); |
1111 | pnfs_layoutcommit_inode(ino, true); | |
1112 | if (layoutreturn) | |
ed429d6b | 1113 | pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
e755d638 | 1114 | return roc; |
f7e8917a FI |
1115 | } |
1116 | ||
1117 | void pnfs_roc_release(struct inode *ino) | |
1118 | { | |
1119 | struct pnfs_layout_hdr *lo; | |
1120 | ||
1121 | spin_lock(&ino->i_lock); | |
1122 | lo = NFS_I(ino)->layout; | |
5c4a79fb | 1123 | pnfs_clear_layoutreturn_waitbit(lo); |
6622c3ea TM |
1124 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1125 | pnfs_detach_layout_hdr(lo); | |
1126 | spin_unlock(&ino->i_lock); | |
1127 | pnfs_free_layout_hdr(lo); | |
1128 | } else | |
1129 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1130 | } |
1131 | ||
1132 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1133 | { | |
1134 | struct pnfs_layout_hdr *lo; | |
1135 | ||
1136 | spin_lock(&ino->i_lock); | |
1137 | lo = NFS_I(ino)->layout; | |
0654cc72 | 1138 | pnfs_mark_layout_returned_if_empty(lo); |
0f35ad6f | 1139 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1140 | lo->plh_barrier = barrier; |
1141 | spin_unlock(&ino->i_lock); | |
6a463beb | 1142 | trace_nfs4_layoutreturn_on_close(ino, 0); |
f7e8917a FI |
1143 | } |
1144 | ||
4ff376fe | 1145 | void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier) |
f7e8917a FI |
1146 | { |
1147 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1148 | struct pnfs_layout_hdr *lo; |
7fdab069 | 1149 | u32 current_seqid; |
f7e8917a FI |
1150 | |
1151 | spin_lock(&ino->i_lock); | |
7fdab069 TM |
1152 | lo = nfsi->layout; |
1153 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1154 | |
7fdab069 TM |
1155 | /* Since close does not return a layout stateid for use as |
1156 | * a barrier, we choose the worst-case barrier. | |
1157 | */ | |
1158 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
f7e8917a | 1159 | spin_unlock(&ino->i_lock); |
f7e8917a FI |
1160 | } |
1161 | ||
500d701f PT |
1162 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
1163 | { | |
1164 | struct nfs_inode *nfsi = NFS_I(ino); | |
1165 | struct pnfs_layout_hdr *lo; | |
1166 | bool sleep = false; | |
1167 | ||
1168 | /* we might not have grabbed lo reference. so need to check under | |
1169 | * i_lock */ | |
1170 | spin_lock(&ino->i_lock); | |
1171 | lo = nfsi->layout; | |
1172 | if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
1173 | sleep = true; | |
1174 | spin_unlock(&ino->i_lock); | |
1175 | ||
1176 | if (sleep) | |
1177 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
1178 | ||
1179 | return sleep; | |
1180 | } | |
1181 | ||
b1f69b75 AA |
1182 | /* |
1183 | * Compare two layout segments for sorting into layout cache. | |
1184 | * We want to preferentially return RW over RO layouts, so ensure those | |
1185 | * are seen first. | |
1186 | */ | |
1187 | static s64 | |
7dc0ac70 | 1188 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1189 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1190 | { |
fb3296eb BH |
1191 | s64 d; |
1192 | ||
1193 | /* high offset > low offset */ | |
1194 | d = l1->offset - l2->offset; | |
1195 | if (d) | |
1196 | return d; | |
1197 | ||
1198 | /* short length > long length */ | |
1199 | d = l2->length - l1->length; | |
1200 | if (d) | |
1201 | return d; | |
1202 | ||
b1f69b75 | 1203 | /* read > read/write */ |
fb3296eb | 1204 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1205 | } |
1206 | ||
03772d2f TM |
1207 | static bool |
1208 | pnfs_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
1209 | const struct pnfs_layout_range *l2) | |
1210 | { | |
1211 | return pnfs_lseg_range_cmp(l1, l2) > 0; | |
1212 | } | |
1213 | ||
1214 | static bool | |
1215 | pnfs_lseg_no_merge(struct pnfs_layout_segment *lseg, | |
1216 | struct pnfs_layout_segment *old) | |
1217 | { | |
1218 | return false; | |
1219 | } | |
1220 | ||
1221 | void | |
1222 | pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1223 | struct pnfs_layout_segment *lseg, | |
1224 | bool (*is_after)(const struct pnfs_layout_range *, | |
1225 | const struct pnfs_layout_range *), | |
1226 | bool (*do_merge)(struct pnfs_layout_segment *, | |
1227 | struct pnfs_layout_segment *), | |
1228 | struct list_head *free_me) | |
974cec8c | 1229 | { |
03772d2f | 1230 | struct pnfs_layout_segment *lp, *tmp; |
b1f69b75 | 1231 | |
974cec8c AA |
1232 | dprintk("%s:Begin\n", __func__); |
1233 | ||
03772d2f TM |
1234 | list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) { |
1235 | if (test_bit(NFS_LSEG_VALID, &lp->pls_flags) == 0) | |
1236 | continue; | |
1237 | if (do_merge(lseg, lp)) { | |
1238 | mark_lseg_invalid(lp, free_me); | |
1239 | continue; | |
1240 | } | |
1241 | if (is_after(&lseg->pls_range, &lp->pls_range)) | |
b1f69b75 | 1242 | continue; |
566052c5 | 1243 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1244 | dprintk("%s: inserted lseg %p " |
1245 | "iomode %d offset %llu length %llu before " | |
1246 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1247 | __func__, lseg, lseg->pls_range.iomode, |
1248 | lseg->pls_range.offset, lseg->pls_range.length, | |
1249 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1250 | lp->pls_range.length); | |
fb3296eb | 1251 | goto out; |
974cec8c | 1252 | } |
fb3296eb BH |
1253 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1254 | dprintk("%s: inserted lseg %p " | |
1255 | "iomode %d offset %llu length %llu at tail\n", | |
1256 | __func__, lseg, lseg->pls_range.iomode, | |
1257 | lseg->pls_range.offset, lseg->pls_range.length); | |
1258 | out: | |
70c3bd2b | 1259 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1260 | |
1261 | dprintk("%s:Return\n", __func__); | |
e5e94017 | 1262 | } |
03772d2f TM |
1263 | EXPORT_SYMBOL_GPL(pnfs_generic_layout_insert_lseg); |
1264 | ||
1265 | static void | |
1266 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1267 | struct pnfs_layout_segment *lseg, | |
1268 | struct list_head *free_me) | |
1269 | { | |
1270 | struct inode *inode = lo->plh_inode; | |
1271 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
1272 | ||
1273 | if (ld->add_lseg != NULL) | |
1274 | ld->add_lseg(lo, lseg, free_me); | |
1275 | else | |
1276 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
1277 | pnfs_lseg_range_is_after, | |
1278 | pnfs_lseg_no_merge, | |
1279 | free_me); | |
1280 | } | |
e5e94017 BH |
1281 | |
1282 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1283 | alloc_init_layout_hdr(struct inode *ino, |
1284 | struct nfs_open_context *ctx, | |
1285 | gfp_t gfp_flags) | |
e5e94017 BH |
1286 | { |
1287 | struct pnfs_layout_hdr *lo; | |
1288 | ||
636fb9c8 | 1289 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1290 | if (!lo) |
1291 | return NULL; | |
cc6e5340 | 1292 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1293 | INIT_LIST_HEAD(&lo->plh_layouts); |
1294 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1295 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1296 | lo->plh_inode = ino; |
5cc2216d | 1297 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1298 | return lo; |
1299 | } | |
1300 | ||
1301 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1302 | pnfs_find_alloc_layout(struct inode *ino, |
1303 | struct nfs_open_context *ctx, | |
1304 | gfp_t gfp_flags) | |
e5e94017 BH |
1305 | { |
1306 | struct nfs_inode *nfsi = NFS_I(ino); | |
1307 | struct pnfs_layout_hdr *new = NULL; | |
1308 | ||
1309 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1310 | ||
251ec410 TM |
1311 | if (nfsi->layout != NULL) |
1312 | goto out_existing; | |
e5e94017 | 1313 | spin_unlock(&ino->i_lock); |
9fa40758 | 1314 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1315 | spin_lock(&ino->i_lock); |
1316 | ||
251ec410 | 1317 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1318 | nfsi->layout = new; |
251ec410 | 1319 | return new; |
7175fe90 YN |
1320 | } else if (new != NULL) |
1321 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1322 | out_existing: |
1323 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1324 | return nfsi->layout; |
1325 | } | |
1326 | ||
b1f69b75 AA |
1327 | /* |
1328 | * iomode matching rules: | |
1329 | * iomode lseg match | |
1330 | * ----- ----- ----- | |
1331 | * ANY READ true | |
1332 | * ANY RW true | |
1333 | * RW READ false | |
1334 | * RW RW true | |
1335 | * READ READ true | |
1336 | * READ RW true | |
1337 | */ | |
3cb2df17 | 1338 | static bool |
7dc0ac70 | 1339 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
3cb2df17 | 1340 | const struct pnfs_layout_range *range) |
b1f69b75 | 1341 | { |
fb3296eb BH |
1342 | struct pnfs_layout_range range1; |
1343 | ||
1344 | if ((range->iomode == IOMODE_RW && | |
1345 | ls_range->iomode != IOMODE_RW) || | |
7dc0ac70 | 1346 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1347 | return 0; |
1348 | ||
1349 | /* range1 covers only the first byte in the range */ | |
1350 | range1 = *range; | |
1351 | range1.length = 1; | |
7dc0ac70 | 1352 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1353 | } |
1354 | ||
1355 | /* | |
1356 | * lookup range in layout | |
1357 | */ | |
e5e94017 | 1358 | static struct pnfs_layout_segment * |
fb3296eb BH |
1359 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1360 | struct pnfs_layout_range *range) | |
e5e94017 | 1361 | { |
b1f69b75 AA |
1362 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1363 | ||
1364 | dprintk("%s:Begin\n", __func__); | |
1365 | ||
b7edfaa1 | 1366 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1367 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1368 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
7dc0ac70 | 1369 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
9369a431 | 1370 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1371 | break; |
1372 | } | |
b1f69b75 AA |
1373 | } |
1374 | ||
1375 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1376 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1377 | return ret; |
e5e94017 BH |
1378 | } |
1379 | ||
d23d61c8 AA |
1380 | /* |
1381 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1382 | * to the MDS or over pNFS | |
1383 | * | |
1384 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1385 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1386 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1387 | * WRITE request. | |
1388 | * | |
1389 | * A return of true means use MDS I/O. | |
1390 | * | |
1391 | * From rfc 5661: | |
1392 | * If a file's size is smaller than the file size threshold, data accesses | |
1393 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1394 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1395 | * server. If both file size and I/O size are provided, the client SHOULD | |
1396 | * reach or exceed both thresholds before sending its read or write | |
1397 | * requests to the data server. | |
1398 | */ | |
1399 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1400 | struct inode *ino, int iomode) | |
1401 | { | |
1402 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1403 | struct nfs_inode *nfsi = NFS_I(ino); | |
1404 | loff_t fsize = i_size_read(ino); | |
1405 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1406 | ||
1407 | if (t == NULL) | |
1408 | return ret; | |
1409 | ||
1410 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1411 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1412 | ||
1413 | switch (iomode) { | |
1414 | case IOMODE_READ: | |
1415 | if (t->bm & THRESHOLD_RD) { | |
1416 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1417 | size_set = true; | |
1418 | if (fsize < t->rd_sz) | |
1419 | size = true; | |
1420 | } | |
1421 | if (t->bm & THRESHOLD_RD_IO) { | |
1422 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1423 | nfsi->read_io); | |
1424 | io_set = true; | |
1425 | if (nfsi->read_io < t->rd_io_sz) | |
1426 | io = true; | |
1427 | } | |
1428 | break; | |
1429 | case IOMODE_RW: | |
1430 | if (t->bm & THRESHOLD_WR) { | |
1431 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1432 | size_set = true; | |
1433 | if (fsize < t->wr_sz) | |
1434 | size = true; | |
1435 | } | |
1436 | if (t->bm & THRESHOLD_WR_IO) { | |
1437 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1438 | nfsi->write_io); | |
1439 | io_set = true; | |
1440 | if (nfsi->write_io < t->wr_io_sz) | |
1441 | io = true; | |
1442 | } | |
1443 | break; | |
1444 | } | |
1445 | if (size_set && io_set) { | |
1446 | if (size && io) | |
1447 | ret = true; | |
1448 | } else if (size || io) | |
1449 | ret = true; | |
1450 | ||
1451 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1452 | return ret; | |
1453 | } | |
1454 | ||
aa8a45ee PT |
1455 | static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) |
1456 | { | |
1457 | /* | |
1458 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1459 | * reference | |
1460 | */ | |
1461 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
1462 | return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
2e5b29f0 | 1463 | nfs_wait_bit_killable, |
aa8a45ee PT |
1464 | TASK_UNINTERRUPTIBLE); |
1465 | } | |
1466 | ||
d67ae825 TH |
1467 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1468 | { | |
1469 | unsigned long *bitlock = &lo->plh_flags; | |
1470 | ||
1471 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1472 | smp_mb__after_atomic(); | |
1473 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1474 | } | |
1475 | ||
e5e94017 BH |
1476 | /* |
1477 | * Layout segment is retreived from the server if not cached. | |
1478 | * The appropriate layout segment is referenced and returned to the caller. | |
1479 | */ | |
7c24d948 | 1480 | struct pnfs_layout_segment * |
e5e94017 BH |
1481 | pnfs_update_layout(struct inode *ino, |
1482 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1483 | loff_t pos, |
1484 | u64 count, | |
a75b9df9 TM |
1485 | enum pnfs_iomode iomode, |
1486 | gfp_t gfp_flags) | |
e5e94017 | 1487 | { |
fb3296eb BH |
1488 | struct pnfs_layout_range arg = { |
1489 | .iomode = iomode, | |
1490 | .offset = pos, | |
1491 | .length = count, | |
1492 | }; | |
707ed5fd | 1493 | unsigned pg_offset; |
6382a441 WAA |
1494 | struct nfs_server *server = NFS_SERVER(ino); |
1495 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1496 | struct pnfs_layout_hdr *lo; |
1497 | struct pnfs_layout_segment *lseg = NULL; | |
30005121 | 1498 | bool first; |
e5e94017 | 1499 | |
9a4bf31d | 1500 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) { |
f4848303 | 1501 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1502 | PNFS_UPDATE_LAYOUT_NO_PNFS); |
f86bbcf8 | 1503 | goto out; |
9a4bf31d | 1504 | } |
d23d61c8 | 1505 | |
9a4bf31d | 1506 | if (iomode == IOMODE_READ && i_size_read(ino) == 0) { |
f4848303 | 1507 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1508 | PNFS_UPDATE_LAYOUT_RD_ZEROLEN); |
4ae93560 | 1509 | goto out; |
9a4bf31d | 1510 | } |
4ae93560 | 1511 | |
9a4bf31d | 1512 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { |
f4848303 | 1513 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1514 | PNFS_UPDATE_LAYOUT_MDSTHRESH); |
f86bbcf8 | 1515 | goto out; |
9a4bf31d | 1516 | } |
d23d61c8 | 1517 | |
9bf87482 PT |
1518 | lookup_again: |
1519 | first = false; | |
e5e94017 | 1520 | spin_lock(&ino->i_lock); |
9fa40758 | 1521 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1522 | if (lo == NULL) { |
1523 | spin_unlock(&ino->i_lock); | |
f4848303 | 1524 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1525 | PNFS_UPDATE_LAYOUT_NOMEM); |
830ffb56 TM |
1526 | goto out; |
1527 | } | |
e5e94017 | 1528 | |
43f1b3da | 1529 | /* Do we even need to bother with this? */ |
a59c30ac | 1530 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
f4848303 | 1531 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1532 | PNFS_UPDATE_LAYOUT_BULK_RECALL); |
43f1b3da | 1533 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1534 | goto out_unlock; |
1535 | } | |
1536 | ||
1537 | /* if LAYOUTGET already failed once we don't try again */ | |
2e5b29f0 | 1538 | if (pnfs_layout_io_test_failed(lo, iomode)) { |
f4848303 | 1539 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1540 | PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); |
e5e94017 | 1541 | goto out_unlock; |
9a4bf31d | 1542 | } |
e5e94017 | 1543 | |
9bf87482 PT |
1544 | first = list_empty(&lo->plh_segs); |
1545 | if (first) { | |
1546 | /* The first layoutget for the file. Need to serialize per | |
1547 | * RFC 5661 Errata 3208. | |
1548 | */ | |
1549 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1550 | &lo->plh_flags)) { | |
1551 | spin_unlock(&ino->i_lock); | |
1552 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1553 | TASK_UNINTERRUPTIBLE); | |
1554 | pnfs_put_layout_hdr(lo); | |
1555 | goto lookup_again; | |
1556 | } | |
1557 | } else { | |
1558 | /* Check to see if the layout for the given range | |
1559 | * already exists | |
1560 | */ | |
1561 | lseg = pnfs_find_lseg(lo, &arg); | |
9a4bf31d | 1562 | if (lseg) { |
f4848303 | 1563 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1564 | PNFS_UPDATE_LAYOUT_FOUND_CACHED); |
9bf87482 | 1565 | goto out_unlock; |
9a4bf31d | 1566 | } |
9bf87482 | 1567 | } |
568e8c49 | 1568 | |
aa8a45ee PT |
1569 | /* |
1570 | * Because we free lsegs before sending LAYOUTRETURN, we need to wait | |
1571 | * for LAYOUTRETURN even if first is true. | |
1572 | */ | |
8f70f53a | 1573 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
aa8a45ee PT |
1574 | spin_unlock(&ino->i_lock); |
1575 | dprintk("%s wait for layoutreturn\n", __func__); | |
1576 | if (pnfs_prepare_to_retry_layoutget(lo)) { | |
d67ae825 TH |
1577 | if (first) |
1578 | pnfs_clear_first_layoutget(lo); | |
aa8a45ee PT |
1579 | pnfs_put_layout_hdr(lo); |
1580 | dprintk("%s retrying\n", __func__); | |
1581 | goto lookup_again; | |
1582 | } | |
f4848303 | 1583 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1584 | PNFS_UPDATE_LAYOUT_RETURN); |
aa8a45ee PT |
1585 | goto out_put_layout_hdr; |
1586 | } | |
1587 | ||
9a4bf31d | 1588 | if (pnfs_layoutgets_blocked(lo)) { |
f4848303 | 1589 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1590 | PNFS_UPDATE_LAYOUT_BLOCKED); |
cf7d63f1 | 1591 | goto out_unlock; |
9a4bf31d | 1592 | } |
cf7d63f1 | 1593 | atomic_inc(&lo->plh_outstanding); |
f49f9baa | 1594 | spin_unlock(&ino->i_lock); |
30005121 | 1595 | |
abb9a007 | 1596 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1597 | /* The lo must be on the clp list if there is any |
1598 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1599 | */ | |
1600 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1601 | if (list_empty(&lo->plh_layouts)) |
1602 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1603 | spin_unlock(&clp->cl_lock); |
1604 | } | |
e5e94017 | 1605 | |
707ed5fd BH |
1606 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1607 | if (pg_offset) { | |
1608 | arg.offset -= pg_offset; | |
1609 | arg.length += pg_offset; | |
1610 | } | |
7c24d948 AA |
1611 | if (arg.length != NFS4_MAX_UINT64) |
1612 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1613 | |
fb3296eb | 1614 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
cf7d63f1 | 1615 | atomic_dec(&lo->plh_outstanding); |
f4848303 | 1616 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1617 | PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); |
830ffb56 | 1618 | out_put_layout_hdr: |
d67ae825 TH |
1619 | if (first) |
1620 | pnfs_clear_first_layoutget(lo); | |
70c3bd2b | 1621 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1622 | out: |
f86bbcf8 TM |
1623 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1624 | "(%s, offset: %llu, length: %llu)\n", | |
1625 | __func__, ino->i_sb->s_id, | |
1626 | (unsigned long long)NFS_FILEID(ino), | |
d600ad1f | 1627 | IS_ERR_OR_NULL(lseg) ? "not found" : "found", |
f86bbcf8 TM |
1628 | iomode==IOMODE_RW ? "read/write" : "read-only", |
1629 | (unsigned long long)pos, | |
1630 | (unsigned long long)count); | |
e5e94017 BH |
1631 | return lseg; |
1632 | out_unlock: | |
1633 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1634 | goto out_put_layout_hdr; |
e5e94017 | 1635 | } |
7c24d948 | 1636 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1637 | |
540d9864 TM |
1638 | static bool |
1639 | pnfs_sanity_check_layout_range(struct pnfs_layout_range *range) | |
1640 | { | |
1641 | switch (range->iomode) { | |
1642 | case IOMODE_READ: | |
1643 | case IOMODE_RW: | |
1644 | break; | |
1645 | default: | |
1646 | return false; | |
1647 | } | |
1648 | if (range->offset == NFS4_MAX_UINT64) | |
1649 | return false; | |
1650 | if (range->length == 0) | |
1651 | return false; | |
1652 | if (range->length != NFS4_MAX_UINT64 && | |
1653 | range->length > NFS4_MAX_UINT64 - range->offset) | |
1654 | return false; | |
1655 | return true; | |
1656 | } | |
1657 | ||
a0b0a6e3 | 1658 | struct pnfs_layout_segment * |
b1f69b75 AA |
1659 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1660 | { | |
1661 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1662 | struct nfs4_layoutget_res *res = &lgp->res; | |
1663 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1664 | struct inode *ino = lo->plh_inode; |
78096cca | 1665 | LIST_HEAD(free_me); |
540d9864 TM |
1666 | int status = -EINVAL; |
1667 | ||
1668 | if (!pnfs_sanity_check_layout_range(&res->range)) | |
1669 | goto out; | |
b1f69b75 AA |
1670 | |
1671 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1672 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1673 | if (!lseg || IS_ERR(lseg)) { |
1674 | if (!lseg) | |
1675 | status = -ENOMEM; | |
1676 | else | |
1677 | status = PTR_ERR(lseg); | |
1678 | dprintk("%s: Could not allocate layout: error %d\n", | |
1679 | __func__, status); | |
1680 | goto out; | |
1681 | } | |
1682 | ||
1013df61 CH |
1683 | init_lseg(lo, lseg); |
1684 | lseg->pls_range = res->range; | |
1685 | ||
b1f69b75 | 1686 | spin_lock(&ino->i_lock); |
e1c06f80 | 1687 | if (pnfs_layoutgets_blocked(lo)) { |
43f1b3da FI |
1688 | dprintk("%s forget reply due to state\n", __func__); |
1689 | goto out_forget_reply; | |
1690 | } | |
038d6493 | 1691 | |
362f7474 CH |
1692 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1693 | /* existing state ID, make sure the sequence number matches. */ | |
1694 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1695 | dprintk("%s forget reply due to sequence\n", __func__); | |
4f2e9dce | 1696 | status = -EAGAIN; |
362f7474 CH |
1697 | goto out_forget_reply; |
1698 | } | |
1699 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1700 | } else { | |
1701 | /* | |
1702 | * We got an entirely new state ID. Mark all segments for the | |
1703 | * inode invalid, and don't bother validating the stateid | |
1704 | * sequence number. | |
1705 | */ | |
1706 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); | |
1707 | ||
1708 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1709 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1710 | } | |
038d6493 | 1711 | |
47abadef CH |
1712 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
1713 | ||
9369a431 | 1714 | pnfs_get_lseg(lseg); |
03772d2f | 1715 | pnfs_layout_insert_lseg(lo, lseg, &free_me); |
b1f69b75 | 1716 | |
3976143b | 1717 | if (res->return_on_close) |
f7e8917a | 1718 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
f7e8917a | 1719 | |
b1f69b75 | 1720 | spin_unlock(&ino->i_lock); |
78096cca | 1721 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1722 | return lseg; |
b1f69b75 | 1723 | out: |
a0b0a6e3 | 1724 | return ERR_PTR(status); |
43f1b3da FI |
1725 | |
1726 | out_forget_reply: | |
1727 | spin_unlock(&ino->i_lock); | |
1728 | lseg->pls_layout = lo; | |
1729 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1730 | goto out; | |
b1f69b75 AA |
1731 | } |
1732 | ||
016256df | 1733 | static void |
5c97f5de TM |
1734 | pnfs_set_plh_return_iomode(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode) |
1735 | { | |
1736 | if (lo->plh_return_iomode == iomode) | |
1737 | return; | |
1738 | if (lo->plh_return_iomode != 0) | |
1739 | iomode = IOMODE_ANY; | |
1740 | lo->plh_return_iomode = iomode; | |
e0fa0d01 | 1741 | set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); |
5c97f5de TM |
1742 | } |
1743 | ||
2f215968 TM |
1744 | /** |
1745 | * pnfs_mark_matching_lsegs_return - Free or return matching layout segments | |
1746 | * @lo: pointer to layout header | |
1747 | * @tmp_list: list header to be used with pnfs_free_lseg_list() | |
1748 | * @return_range: describe layout segment ranges to be returned | |
1749 | * | |
1750 | * This function is mainly intended for use by layoutrecall. It attempts | |
1751 | * to free the layout segment immediately, or else to mark it for return | |
1752 | * as soon as its reference count drops to zero. | |
1753 | */ | |
10335556 | 1754 | int |
016256df PT |
1755 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
1756 | struct list_head *tmp_list, | |
506c0d68 | 1757 | const struct pnfs_layout_range *return_range) |
016256df PT |
1758 | { |
1759 | struct pnfs_layout_segment *lseg, *next; | |
10335556 | 1760 | int remaining = 0; |
016256df PT |
1761 | |
1762 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
1763 | ||
1764 | if (list_empty(&lo->plh_segs)) | |
10335556 | 1765 | return 0; |
016256df | 1766 | |
fc7ff367 | 1767 | assert_spin_locked(&lo->plh_inode->i_lock); |
016256df PT |
1768 | |
1769 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
1770 | if (should_free_lseg(&lseg->pls_range, return_range)) { | |
1771 | dprintk("%s: marking lseg %p iomode %d " | |
1772 | "offset %llu length %llu\n", __func__, | |
1773 | lseg, lseg->pls_range.iomode, | |
1774 | lseg->pls_range.offset, | |
1775 | lseg->pls_range.length); | |
2f215968 TM |
1776 | if (mark_lseg_invalid(lseg, tmp_list)) |
1777 | continue; | |
1778 | remaining++; | |
016256df | 1779 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); |
5c97f5de | 1780 | pnfs_set_plh_return_iomode(lo, return_range->iomode); |
016256df | 1781 | } |
10335556 | 1782 | return remaining; |
016256df PT |
1783 | } |
1784 | ||
1785 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
1786 | struct pnfs_layout_segment *lseg) | |
1787 | { | |
1788 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
016256df PT |
1789 | struct pnfs_layout_range range = { |
1790 | .iomode = lseg->pls_range.iomode, | |
1791 | .offset = 0, | |
1792 | .length = NFS4_MAX_UINT64, | |
1793 | }; | |
1794 | LIST_HEAD(free_me); | |
10335556 | 1795 | bool return_now = false; |
016256df PT |
1796 | |
1797 | spin_lock(&inode->i_lock); | |
5c97f5de | 1798 | pnfs_set_plh_return_iomode(lo, range.iomode); |
016256df PT |
1799 | /* |
1800 | * mark all matching lsegs so that we are sure to have no live | |
1801 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
1802 | * for how it works. | |
1803 | */ | |
10335556 TM |
1804 | if (!pnfs_mark_matching_lsegs_return(lo, &free_me, &range)) { |
1805 | nfs4_stateid stateid; | |
1806 | enum pnfs_iomode iomode = lo->plh_return_iomode; | |
1807 | ||
1808 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); | |
1809 | return_now = pnfs_prepare_layoutreturn(lo); | |
1810 | spin_unlock(&inode->i_lock); | |
1811 | if (return_now) | |
1812 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
1813 | } else { | |
1814 | spin_unlock(&inode->i_lock); | |
1815 | nfs_commit_inode(inode, 0); | |
1816 | } | |
016256df PT |
1817 | pnfs_free_lseg_list(&free_me); |
1818 | } | |
1819 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
1820 | ||
d8007d4d TM |
1821 | void |
1822 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1823 | { | |
1fd937bd PT |
1824 | u64 rd_size = req->wb_bytes; |
1825 | ||
cb5d04bc PT |
1826 | if (pgio->pg_lseg == NULL) { |
1827 | if (pgio->pg_dreq == NULL) | |
1828 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1829 | else | |
1830 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1831 | ||
1832 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1833 | req->wb_context, | |
1834 | req_offset(req), | |
1835 | rd_size, | |
1836 | IOMODE_READ, | |
1837 | GFP_KERNEL); | |
d600ad1f PT |
1838 | if (IS_ERR(pgio->pg_lseg)) { |
1839 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1840 | pgio->pg_lseg = NULL; | |
1841 | return; | |
1842 | } | |
cb5d04bc | 1843 | } |
e885de1a TM |
1844 | /* If no lseg, fall back to read through mds */ |
1845 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1846 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1847 | |
d8007d4d TM |
1848 | } |
1849 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1850 | ||
1851 | void | |
6296556f PT |
1852 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1853 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1854 | { |
d600ad1f | 1855 | if (pgio->pg_lseg == NULL) { |
cb5d04bc PT |
1856 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1857 | req->wb_context, | |
1858 | req_offset(req), | |
1859 | wb_size, | |
1860 | IOMODE_RW, | |
1861 | GFP_NOFS); | |
d600ad1f PT |
1862 | if (IS_ERR(pgio->pg_lseg)) { |
1863 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1864 | pgio->pg_lseg = NULL; | |
1865 | return; | |
1866 | } | |
1867 | } | |
e885de1a TM |
1868 | /* If no lseg, fall back to write through mds */ |
1869 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1870 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1871 | } |
1872 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1873 | ||
180bb5ec WAA |
1874 | void |
1875 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
1876 | { | |
1877 | if (desc->pg_lseg) { | |
1878 | pnfs_put_lseg(desc->pg_lseg); | |
1879 | desc->pg_lseg = NULL; | |
1880 | } | |
1881 | } | |
1882 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
1883 | ||
b4fdac1a WAA |
1884 | /* |
1885 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1886 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1887 | */ | |
1888 | size_t | |
a7d42ddb WAA |
1889 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
1890 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 1891 | { |
0f9c429e | 1892 | unsigned int size; |
c5e20cb7 | 1893 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1894 | |
1895 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1896 | if (!size) |
1897 | return 0; | |
94ad1c80 | 1898 | |
19982ba8 | 1899 | /* |
c5e20cb7 WAA |
1900 | * 'size' contains the number of bytes left in the current page (up |
1901 | * to the original size asked for in @req->wb_bytes). | |
1902 | * | |
1903 | * Calculate how many bytes are left in the layout segment | |
1904 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1905 | * |
1906 | * Please also note that 'end_offset' is actually the offset of the | |
1907 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1908 | * | |
1909 | */ | |
19b54848 | 1910 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
1911 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
1912 | pgio->pg_lseg->pls_range.length); | |
1913 | req_start = req_offset(req); | |
7c13789e | 1914 | WARN_ON_ONCE(req_start >= seg_end); |
c5e20cb7 | 1915 | /* start of request is past the last byte of this segment */ |
7c13789e WAA |
1916 | if (req_start >= seg_end) { |
1917 | /* reference the new lseg */ | |
1918 | if (pgio->pg_ops->pg_cleanup) | |
1919 | pgio->pg_ops->pg_cleanup(pgio); | |
1920 | if (pgio->pg_ops->pg_init) | |
1921 | pgio->pg_ops->pg_init(pgio, req); | |
19b54848 | 1922 | return 0; |
7c13789e | 1923 | } |
c5e20cb7 WAA |
1924 | |
1925 | /* adjust 'size' iff there are fewer bytes left in the | |
1926 | * segment than what nfs_generic_pg_test returned */ | |
1927 | seg_left = seg_end - req_start; | |
1928 | if (seg_left < size) | |
1929 | size = (unsigned int)seg_left; | |
19b54848 | 1930 | } |
0f9c429e | 1931 | |
19b54848 | 1932 | return size; |
94ad1c80 | 1933 | } |
89a58e32 | 1934 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1935 | |
53113ad3 | 1936 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
1937 | { |
1938 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
1939 | |
1940 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
1941 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
1942 | hdr->completion_ops); | |
c7070113 | 1943 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 1944 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 1945 | } |
e7dd79af | 1946 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1947 | |
d45f60c6 | 1948 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1949 | { |
cd841605 FI |
1950 | |
1951 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1952 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1953 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1954 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1955 | } |
6c75dc0d | 1956 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1957 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
1958 | } |
1959 | ||
d20581aa BH |
1960 | /* |
1961 | * Called by non rpc-based layout drivers | |
1962 | */ | |
d45f60c6 | 1963 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 1964 | { |
f8417b48 | 1965 | if (likely(!hdr->pnfs_error)) { |
67af7611 TM |
1966 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
1967 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 1968 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
1969 | } |
1970 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); | |
1971 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
1972 | pnfs_ld_handle_write_error(hdr); |
1973 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 1974 | } |
d20581aa | 1975 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1976 | |
dce81290 TM |
1977 | static void |
1978 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1979 | struct nfs_pgio_header *hdr) |
dce81290 | 1980 | { |
48d635f1 | 1981 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1982 | |
6c75dc0d | 1983 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1984 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 1985 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 1986 | mirror->pg_recoalesce = 1; |
6c75dc0d | 1987 | } |
d45f60c6 | 1988 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 1989 | hdr->release(hdr); |
dce81290 TM |
1990 | } |
1991 | ||
1992 | static enum pnfs_try_status | |
d45f60c6 | 1993 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
1994 | const struct rpc_call_ops *call_ops, |
1995 | struct pnfs_layout_segment *lseg, | |
1996 | int how) | |
0382b744 | 1997 | { |
cd841605 | 1998 | struct inode *inode = hdr->inode; |
0382b744 AA |
1999 | enum pnfs_try_status trypnfs; |
2000 | struct nfs_server *nfss = NFS_SERVER(inode); | |
2001 | ||
cd841605 | 2002 | hdr->mds_ops = call_ops; |
0382b744 AA |
2003 | |
2004 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
2005 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
2006 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 2007 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 2008 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
2009 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2010 | return trypnfs; | |
2011 | } | |
2012 | ||
dce81290 | 2013 | static void |
7f714720 WAA |
2014 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
2015 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 2016 | { |
dce81290 TM |
2017 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2018 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2019 | enum pnfs_try_status trypnfs; |
dce81290 | 2020 | |
d45f60c6 | 2021 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 2022 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 2023 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
2024 | } |
2025 | ||
6c75dc0d FI |
2026 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
2027 | { | |
9369a431 | 2028 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2029 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
2030 | } |
2031 | ||
dce81290 TM |
2032 | int |
2033 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
2034 | { | |
6c75dc0d | 2035 | struct nfs_pgio_header *hdr; |
dce81290 TM |
2036 | int ret; |
2037 | ||
1e7f3a48 WAA |
2038 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2039 | if (!hdr) { | |
2bff2288 PT |
2040 | desc->pg_error = -ENOMEM; |
2041 | return desc->pg_error; | |
dce81290 | 2042 | } |
6c75dc0d | 2043 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 2044 | |
9369a431 | 2045 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2046 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2047 | if (!ret) |
7f714720 | 2048 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 2049 | |
6c75dc0d | 2050 | return ret; |
dce81290 TM |
2051 | } |
2052 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
2053 | ||
53113ad3 | 2054 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
2055 | { |
2056 | struct nfs_pageio_descriptor pgio; | |
2057 | ||
1acbbb4e | 2058 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
2059 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
2060 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 2061 | } |
e7dd79af | 2062 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 2063 | |
d45f60c6 | 2064 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2065 | { |
cd841605 FI |
2066 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
2067 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2068 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2069 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2070 | } |
4db6e0b7 | 2071 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2072 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
2073 | } |
2074 | ||
d20581aa BH |
2075 | /* |
2076 | * Called by non rpc-based layout drivers | |
2077 | */ | |
d45f60c6 | 2078 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 2079 | { |
cd841605 | 2080 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
2081 | __nfs4_read_done_cb(hdr); |
2082 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
f8417b48 KM |
2083 | } |
2084 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); | |
2085 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2086 | pnfs_ld_handle_read_error(hdr); |
2087 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
2088 | } |
2089 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
2090 | ||
493292dd TM |
2091 | static void |
2092 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2093 | struct nfs_pgio_header *hdr) |
493292dd | 2094 | { |
48d635f1 | 2095 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2096 | |
4db6e0b7 | 2097 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2098 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 2099 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 2100 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 2101 | } |
d45f60c6 | 2102 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2103 | hdr->release(hdr); |
493292dd TM |
2104 | } |
2105 | ||
64419a9b AA |
2106 | /* |
2107 | * Call the appropriate parallel I/O subsystem read function. | |
2108 | */ | |
493292dd | 2109 | static enum pnfs_try_status |
d45f60c6 | 2110 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2111 | const struct rpc_call_ops *call_ops, |
2112 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2113 | { |
cd841605 | 2114 | struct inode *inode = hdr->inode; |
64419a9b AA |
2115 | struct nfs_server *nfss = NFS_SERVER(inode); |
2116 | enum pnfs_try_status trypnfs; | |
2117 | ||
cd841605 | 2118 | hdr->mds_ops = call_ops; |
64419a9b AA |
2119 | |
2120 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2121 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2122 | |
d45f60c6 | 2123 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2124 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2125 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2126 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2127 | return trypnfs; | |
2128 | } | |
863a3c6c | 2129 | |
ceb11e13 PT |
2130 | /* Resend all requests through pnfs. */ |
2131 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) | |
2132 | { | |
2133 | struct nfs_pageio_descriptor pgio; | |
2134 | ||
2135 | nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); | |
2136 | return nfs_pageio_resend(&pgio, hdr); | |
2137 | } | |
2138 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2139 | ||
493292dd | 2140 | static void |
7f714720 | 2141 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2142 | { |
493292dd TM |
2143 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2144 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2145 | enum pnfs_try_status trypnfs; |
ceb11e13 | 2146 | int err = 0; |
493292dd | 2147 | |
d45f60c6 | 2148 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 PT |
2149 | if (trypnfs == PNFS_TRY_AGAIN) |
2150 | err = pnfs_read_resend_pnfs(hdr); | |
2151 | if (trypnfs == PNFS_NOT_ATTEMPTED || err) | |
d45f60c6 | 2152 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
2153 | } |
2154 | ||
4db6e0b7 FI |
2155 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
2156 | { | |
9369a431 | 2157 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2158 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
2159 | } |
2160 | ||
493292dd TM |
2161 | int |
2162 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
2163 | { | |
4db6e0b7 | 2164 | struct nfs_pgio_header *hdr; |
493292dd TM |
2165 | int ret; |
2166 | ||
1e7f3a48 WAA |
2167 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2168 | if (!hdr) { | |
2bff2288 PT |
2169 | desc->pg_error = -ENOMEM; |
2170 | return desc->pg_error; | |
493292dd | 2171 | } |
4db6e0b7 | 2172 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 2173 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2174 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2175 | if (!ret) |
7f714720 | 2176 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 2177 | return ret; |
493292dd TM |
2178 | } |
2179 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
2180 | ||
71244d9b TM |
2181 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
2182 | { | |
2183 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
2184 | ||
2185 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 2186 | smp_mb__after_atomic(); |
71244d9b TM |
2187 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
2188 | } | |
2189 | ||
863a3c6c | 2190 | /* |
a9bae566 | 2191 | * There can be multiple RW segments. |
863a3c6c | 2192 | */ |
a9bae566 | 2193 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 2194 | { |
a9bae566 | 2195 | struct pnfs_layout_segment *lseg; |
863a3c6c | 2196 | |
a9bae566 PT |
2197 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
2198 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 2199 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
2200 | list_add(&lseg->pls_lc_list, listp); |
2201 | } | |
863a3c6c AA |
2202 | } |
2203 | ||
a073dbff TM |
2204 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
2205 | { | |
2206 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
2207 | |
2208 | /* Matched by references in pnfs_set_layoutcommit */ | |
2209 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
2210 | list_del_init(&lseg->pls_lc_list); | |
2211 | pnfs_put_lseg(lseg); | |
2212 | } | |
2213 | ||
71244d9b | 2214 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
2215 | } |
2216 | ||
1b0ae068 PT |
2217 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
2218 | { | |
b9e028fd | 2219 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
2220 | } |
2221 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
2222 | ||
863a3c6c | 2223 | void |
67af7611 TM |
2224 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
2225 | loff_t end_pos) | |
863a3c6c | 2226 | { |
cd841605 | 2227 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 2228 | bool mark_as_dirty = false; |
863a3c6c | 2229 | |
cd841605 | 2230 | spin_lock(&inode->i_lock); |
863a3c6c | 2231 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 2232 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 2233 | mark_as_dirty = true; |
863a3c6c | 2234 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 2235 | __func__, inode->i_ino); |
29559b11 TM |
2236 | } else if (end_pos > nfsi->layout->plh_lwb) |
2237 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 2238 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 2239 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 2240 | pnfs_get_lseg(lseg); |
a9bae566 | 2241 | } |
cd841605 | 2242 | spin_unlock(&inode->i_lock); |
acff5880 | 2243 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 2244 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2245 | |
2246 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2247 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2248 | if (mark_as_dirty) | |
cd841605 | 2249 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2250 | } |
2251 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2252 | ||
db29c089 AA |
2253 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2254 | { | |
2255 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2256 | ||
2257 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2258 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2259 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2260 | } |
2261 | ||
de4b15c7 AA |
2262 | /* |
2263 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2264 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2265 | * data to disk to allow the server to recover the data if it crashes. | |
2266 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2267 | * is off, and a COMMIT is sent to a data server, or | |
2268 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2269 | */ | |
863a3c6c | 2270 | int |
ef311537 | 2271 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2272 | { |
5f919c9f | 2273 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2274 | struct nfs4_layoutcommit_data *data; |
2275 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2276 | loff_t end_pos; |
71244d9b | 2277 | int status; |
863a3c6c | 2278 | |
71244d9b | 2279 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2280 | return 0; |
2281 | ||
71244d9b | 2282 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2283 | |
71244d9b | 2284 | status = -EAGAIN; |
92407e75 | 2285 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2286 | if (!sync) |
2287 | goto out; | |
74316201 | 2288 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2289 | NFS_INO_LAYOUTCOMMITTING, |
2290 | nfs_wait_bit_killable, | |
2291 | TASK_KILLABLE); | |
92407e75 | 2292 | if (status) |
71244d9b | 2293 | goto out; |
92407e75 PT |
2294 | } |
2295 | ||
71244d9b TM |
2296 | status = -ENOMEM; |
2297 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2298 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2299 | if (!data) | |
2300 | goto clear_layoutcommitting; | |
2301 | ||
2302 | status = 0; | |
de4b15c7 | 2303 | spin_lock(&inode->i_lock); |
71244d9b TM |
2304 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2305 | goto out_unlock; | |
a9bae566 | 2306 | |
71244d9b | 2307 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2308 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2309 | |
acff5880 | 2310 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 2311 | |
f597c537 | 2312 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2313 | spin_unlock(&inode->i_lock); |
2314 | ||
2315 | data->args.inode = inode; | |
9fa40758 | 2316 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2317 | nfs_fattr_init(&data->fattr); |
2318 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2319 | data->res.fattr = &data->fattr; | |
2320 | data->args.lastbytewritten = end_pos - 1; | |
2321 | data->res.server = NFS_SERVER(inode); | |
2322 | ||
5f919c9f CH |
2323 | if (ld->prepare_layoutcommit) { |
2324 | status = ld->prepare_layoutcommit(&data->args); | |
2325 | if (status) { | |
3471648a | 2326 | put_rpccred(data->cred); |
5f919c9f | 2327 | spin_lock(&inode->i_lock); |
29559b11 TM |
2328 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
2329 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f | 2330 | nfsi->layout->plh_lwb = end_pos; |
3471648a | 2331 | goto out_unlock; |
5f919c9f CH |
2332 | } |
2333 | } | |
2334 | ||
2335 | ||
863a3c6c AA |
2336 | status = nfs4_proc_layoutcommit(data, sync); |
2337 | out: | |
92407e75 PT |
2338 | if (status) |
2339 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2340 | dprintk("<-- %s status %d\n", __func__, status); |
2341 | return status; | |
71244d9b TM |
2342 | out_unlock: |
2343 | spin_unlock(&inode->i_lock); | |
92407e75 | 2344 | kfree(data); |
71244d9b TM |
2345 | clear_layoutcommitting: |
2346 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2347 | goto out; |
863a3c6c | 2348 | } |
72cff449 | 2349 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 2350 | |
5bb89b47 TM |
2351 | int |
2352 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
2353 | { | |
2354 | return pnfs_layoutcommit_inode(inode, true); | |
2355 | } | |
2356 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
2357 | ||
82be417a AA |
2358 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
2359 | { | |
2360 | struct nfs4_threshold *thp; | |
2361 | ||
2362 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2363 | if (!thp) { | |
2364 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2365 | return NULL; | |
2366 | } | |
2367 | return thp; | |
2368 | } | |
8733408d | 2369 | |
865a7ecb | 2370 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d | 2371 | int |
c8ad8894 | 2372 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
8733408d PT |
2373 | { |
2374 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
2375 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 2376 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
2377 | struct nfs42_layoutstat_data *data; |
2378 | struct pnfs_layout_hdr *hdr; | |
2379 | int status = 0; | |
2380 | ||
2381 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
2382 | goto out; | |
2383 | ||
6c5a0d89 TM |
2384 | if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS)) |
2385 | goto out; | |
2386 | ||
1bfe3b25 PT |
2387 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
2388 | goto out; | |
2389 | ||
8733408d PT |
2390 | spin_lock(&inode->i_lock); |
2391 | if (!NFS_I(inode)->layout) { | |
2392 | spin_unlock(&inode->i_lock); | |
2393 | goto out; | |
2394 | } | |
2395 | hdr = NFS_I(inode)->layout; | |
2396 | pnfs_get_layout_hdr(hdr); | |
2397 | spin_unlock(&inode->i_lock); | |
2398 | ||
c8ad8894 | 2399 | data = kzalloc(sizeof(*data), gfp_flags); |
8733408d PT |
2400 | if (!data) { |
2401 | status = -ENOMEM; | |
2402 | goto out_put; | |
2403 | } | |
2404 | ||
2405 | data->args.fh = NFS_FH(inode); | |
2406 | data->args.inode = inode; | |
2407 | nfs4_stateid_copy(&data->args.stateid, &hdr->plh_stateid); | |
2408 | status = ld->prepare_layoutstats(&data->args); | |
2409 | if (status) | |
2410 | goto out_free; | |
2411 | ||
2412 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
2413 | ||
2414 | out: | |
2415 | dprintk("%s returns %d\n", __func__, status); | |
2416 | return status; | |
2417 | ||
2418 | out_free: | |
2419 | kfree(data); | |
2420 | out_put: | |
2421 | pnfs_put_layout_hdr(hdr); | |
1bfe3b25 PT |
2422 | smp_mb__before_atomic(); |
2423 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
2424 | smp_mb__after_atomic(); | |
8733408d PT |
2425 | goto out; |
2426 | } | |
2427 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 2428 | #endif |
bbf58bf3 TM |
2429 | |
2430 | unsigned int layoutstats_timer; | |
2431 | module_param(layoutstats_timer, uint, 0644); | |
2432 | EXPORT_SYMBOL_GPL(layoutstats_timer); |