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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" |
85e174ba RL |
38 | |
39 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 40 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 41 | |
02c35fca FI |
42 | /* Locking: |
43 | * | |
44 | * pnfs_spinlock: | |
45 | * protects pnfs_modules_tbl. | |
46 | */ | |
47 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
48 | ||
49 | /* | |
50 | * pnfs_modules_tbl holds all pnfs modules | |
51 | */ | |
52 | static LIST_HEAD(pnfs_modules_tbl); | |
53 | ||
aa1e0e3a PT |
54 | static int |
55 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, | |
6c16605d | 56 | enum pnfs_iomode iomode, bool sync); |
aa1e0e3a | 57 | |
02c35fca FI |
58 | /* Return the registered pnfs layout driver module matching given id */ |
59 | static struct pnfs_layoutdriver_type * | |
60 | find_pnfs_driver_locked(u32 id) | |
61 | { | |
62 | struct pnfs_layoutdriver_type *local; | |
63 | ||
64 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
65 | if (local->id == id) | |
66 | goto out; | |
67 | local = NULL; | |
68 | out: | |
69 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
70 | return local; | |
71 | } | |
72 | ||
85e174ba RL |
73 | static struct pnfs_layoutdriver_type * |
74 | find_pnfs_driver(u32 id) | |
75 | { | |
02c35fca FI |
76 | struct pnfs_layoutdriver_type *local; |
77 | ||
78 | spin_lock(&pnfs_spinlock); | |
79 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
80 | if (local != NULL && !try_module_get(local->owner)) { |
81 | dprintk("%s: Could not grab reference on module\n", __func__); | |
82 | local = NULL; | |
83 | } | |
02c35fca FI |
84 | spin_unlock(&pnfs_spinlock); |
85 | return local; | |
85e174ba RL |
86 | } |
87 | ||
88 | void | |
89 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
90 | { | |
738fd0f3 BH |
91 | if (nfss->pnfs_curr_ld) { |
92 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
93 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
94 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
95 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
96 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 97 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 98 | } |
85e174ba RL |
99 | nfss->pnfs_curr_ld = NULL; |
100 | } | |
101 | ||
102 | /* | |
103 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
104 | * Currently only one pNFS layout driver per filesystem is supported. | |
105 | * | |
106 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
107 | */ | |
108 | void | |
738fd0f3 BH |
109 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
110 | u32 id) | |
85e174ba RL |
111 | { |
112 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
113 | ||
114 | if (id == 0) | |
115 | goto out_no_driver; | |
116 | if (!(server->nfs_client->cl_exchange_flags & | |
117 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
a030889a WAA |
118 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
119 | __func__, id, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
120 | goto out_no_driver; |
121 | } | |
122 | ld_type = find_pnfs_driver(id); | |
123 | if (!ld_type) { | |
124 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
125 | ld_type = find_pnfs_driver(id); | |
126 | if (!ld_type) { | |
127 | dprintk("%s: No pNFS module found for %u.\n", | |
128 | __func__, id); | |
129 | goto out_no_driver; | |
130 | } | |
131 | } | |
132 | server->pnfs_curr_ld = ld_type; | |
738fd0f3 BH |
133 | if (ld_type->set_layoutdriver |
134 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
135 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
136 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
137 | module_put(ld_type->owner); |
138 | goto out_no_driver; | |
139 | } | |
2a4c8994 TM |
140 | /* Bump the MDS count */ |
141 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 142 | |
85e174ba RL |
143 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
144 | return; | |
145 | ||
146 | out_no_driver: | |
147 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
148 | server->pnfs_curr_ld = NULL; | |
149 | } | |
02c35fca FI |
150 | |
151 | int | |
152 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
153 | { | |
154 | int status = -EINVAL; | |
155 | struct pnfs_layoutdriver_type *tmp; | |
156 | ||
157 | if (ld_type->id == 0) { | |
a030889a | 158 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
159 | return status; |
160 | } | |
b1f69b75 | 161 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 162 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
163 | "alloc_lseg and free_lseg.\n", __func__); |
164 | return status; | |
165 | } | |
02c35fca FI |
166 | |
167 | spin_lock(&pnfs_spinlock); | |
168 | tmp = find_pnfs_driver_locked(ld_type->id); | |
169 | if (!tmp) { | |
170 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
171 | status = 0; | |
172 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
173 | ld_type->name); | |
174 | } else { | |
a030889a | 175 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
176 | __func__, ld_type->id); |
177 | } | |
178 | spin_unlock(&pnfs_spinlock); | |
179 | ||
180 | return status; | |
181 | } | |
182 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
183 | ||
184 | void | |
185 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
186 | { | |
187 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
188 | spin_lock(&pnfs_spinlock); | |
189 | list_del(&ld_type->pnfs_tblid); | |
190 | spin_unlock(&pnfs_spinlock); | |
191 | } | |
192 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 193 | |
b1f69b75 AA |
194 | /* |
195 | * pNFS client layout cache | |
196 | */ | |
197 | ||
cc6e5340 | 198 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 199 | void |
70c3bd2b | 200 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 201 | { |
cc6e5340 | 202 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
203 | } |
204 | ||
636fb9c8 BH |
205 | static struct pnfs_layout_hdr * |
206 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
207 | { | |
208 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 209 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
210 | } |
211 | ||
212 | static void | |
213 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
214 | { | |
9c626381 TM |
215 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
216 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
217 | ||
218 | if (!list_empty(&lo->plh_layouts)) { | |
219 | struct nfs_client *clp = server->nfs_client; | |
220 | ||
221 | spin_lock(&clp->cl_lock); | |
222 | list_del_init(&lo->plh_layouts); | |
223 | spin_unlock(&clp->cl_lock); | |
224 | } | |
9fa40758 | 225 | put_rpccred(lo->plh_lc_cred); |
57934278 | 226 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
227 | } |
228 | ||
e5e94017 | 229 | static void |
6622c3ea | 230 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 231 | { |
bb346f63 | 232 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 233 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
234 | nfsi->layout = NULL; |
235 | /* Reset MDS Threshold I/O counters */ | |
236 | nfsi->write_io = 0; | |
237 | nfsi->read_io = 0; | |
e5e94017 BH |
238 | } |
239 | ||
b1f69b75 | 240 | void |
70c3bd2b | 241 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 242 | { |
cc6e5340 FI |
243 | struct inode *inode = lo->plh_inode; |
244 | ||
245 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { | |
566f8737 PT |
246 | if (!list_empty(&lo->plh_segs)) |
247 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 248 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 249 | spin_unlock(&inode->i_lock); |
6622c3ea | 250 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 251 | } |
974cec8c AA |
252 | } |
253 | ||
b9e028fd TM |
254 | static int |
255 | pnfs_iomode_to_fail_bit(u32 iomode) | |
256 | { | |
257 | return iomode == IOMODE_RW ? | |
258 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
259 | } | |
260 | ||
261 | static void | |
3e621214 | 262 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 263 | { |
25c75333 | 264 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 265 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
266 | atomic_inc(&lo->plh_refcount); |
267 | } | |
268 | ||
269 | static void | |
270 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
271 | { | |
272 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
273 | atomic_dec(&lo->plh_refcount); | |
274 | } | |
275 | ||
276 | static void | |
277 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
278 | { | |
279 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
280 | struct pnfs_layout_range range = { |
281 | .iomode = iomode, | |
282 | .offset = 0, | |
283 | .length = NFS4_MAX_UINT64, | |
284 | }; | |
285 | LIST_HEAD(head); | |
3e621214 TM |
286 | |
287 | spin_lock(&inode->i_lock); | |
288 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 289 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 290 | spin_unlock(&inode->i_lock); |
115ce575 | 291 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
292 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
293 | iomode == IOMODE_RW ? "RW" : "READ"); | |
294 | } | |
295 | ||
296 | static bool | |
297 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
298 | { | |
25c75333 | 299 | unsigned long start, end; |
3e621214 TM |
300 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
301 | ||
302 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
303 | return false; |
304 | end = jiffies; | |
305 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
306 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
307 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 308 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
309 | return false; |
310 | } | |
311 | return true; | |
b9e028fd TM |
312 | } |
313 | ||
974cec8c AA |
314 | static void |
315 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
316 | { | |
566052c5 | 317 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 318 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
319 | atomic_set(&lseg->pls_refcount, 1); |
320 | smp_mb(); | |
321 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 322 | lseg->pls_layout = lo; |
974cec8c AA |
323 | } |
324 | ||
905ca191 | 325 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 326 | { |
b7edfaa1 | 327 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 328 | |
b1f69b75 | 329 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
330 | } |
331 | ||
d684d2ae | 332 | static void |
57036a37 TM |
333 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
334 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 335 | { |
57036a37 | 336 | struct inode *inode = lo->plh_inode; |
d684d2ae | 337 | |
d20581aa | 338 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 339 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
340 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
341 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
342 | if (list_empty(&lo->plh_segs)) |
343 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
344 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
345 | } | |
346 | ||
aa1e0e3a PT |
347 | /* Return true if layoutreturn is needed */ |
348 | static bool | |
349 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo, | |
27b6f539 | 350 | struct pnfs_layout_segment *lseg) |
aa1e0e3a PT |
351 | { |
352 | struct pnfs_layout_segment *s; | |
353 | ||
354 | if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
355 | return false; | |
356 | ||
357 | list_for_each_entry(s, &lo->plh_segs, pls_list) | |
27b6f539 | 358 | if (s != lseg && test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) |
aa1e0e3a PT |
359 | return false; |
360 | ||
aa1e0e3a PT |
361 | return true; |
362 | } | |
363 | ||
27b6f539 PT |
364 | static void pnfs_layoutreturn_free_lseg(struct work_struct *work) |
365 | { | |
366 | struct pnfs_layout_segment *lseg; | |
367 | struct pnfs_layout_hdr *lo; | |
368 | struct inode *inode; | |
369 | ||
370 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
371 | WARN_ON(atomic_read(&lseg->pls_refcount)); | |
372 | lo = lseg->pls_layout; | |
373 | inode = lo->plh_inode; | |
374 | ||
375 | spin_lock(&inode->i_lock); | |
376 | if (pnfs_layout_need_return(lo, lseg)) { | |
377 | nfs4_stateid stateid; | |
378 | enum pnfs_iomode iomode; | |
379 | ||
380 | stateid = lo->plh_stateid; | |
381 | iomode = lo->plh_return_iomode; | |
382 | /* decreased in pnfs_send_layoutreturn() */ | |
383 | lo->plh_block_lgets++; | |
384 | lo->plh_return_iomode = 0; | |
385 | spin_unlock(&inode->i_lock); | |
386 | ||
387 | pnfs_send_layoutreturn(lo, stateid, iomode, true); | |
388 | spin_lock(&inode->i_lock); | |
389 | } else | |
390 | /* match pnfs_get_layout_hdr #2 in pnfs_put_lseg */ | |
391 | pnfs_put_layout_hdr(lo); | |
392 | pnfs_layout_remove_lseg(lo, lseg); | |
393 | spin_unlock(&inode->i_lock); | |
394 | pnfs_free_lseg(lseg); | |
395 | /* match pnfs_get_layout_hdr #1 in pnfs_put_lseg */ | |
396 | pnfs_put_layout_hdr(lo); | |
397 | } | |
398 | ||
399 | static void | |
400 | pnfs_layoutreturn_free_lseg_async(struct pnfs_layout_segment *lseg) | |
401 | { | |
402 | INIT_WORK(&lseg->pls_work, pnfs_layoutreturn_free_lseg); | |
403 | queue_work(nfsiod_workqueue, &lseg->pls_work); | |
404 | } | |
405 | ||
bae724ef | 406 | void |
9369a431 | 407 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 408 | { |
57036a37 | 409 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
410 | struct inode *inode; |
411 | ||
412 | if (!lseg) | |
413 | return; | |
414 | ||
4541d16c FI |
415 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
416 | atomic_read(&lseg->pls_refcount), | |
417 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
57036a37 TM |
418 | lo = lseg->pls_layout; |
419 | inode = lo->plh_inode; | |
d684d2ae | 420 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
8f0d27dc | 421 | pnfs_get_layout_hdr(lo); |
27b6f539 PT |
422 | if (pnfs_layout_need_return(lo, lseg)) { |
423 | spin_unlock(&inode->i_lock); | |
424 | /* hdr reference dropped in nfs4_layoutreturn_release */ | |
425 | pnfs_get_layout_hdr(lo); | |
426 | pnfs_layoutreturn_free_lseg_async(lseg); | |
427 | } else { | |
428 | pnfs_layout_remove_lseg(lo, lseg); | |
429 | spin_unlock(&inode->i_lock); | |
430 | pnfs_free_lseg(lseg); | |
aa1e0e3a | 431 | pnfs_put_layout_hdr(lo); |
27b6f539 | 432 | } |
4541d16c | 433 | } |
4541d16c | 434 | } |
9369a431 | 435 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 436 | |
6543f803 | 437 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
438 | { |
439 | struct pnfs_layout_segment *lseg; | |
6543f803 | 440 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
441 | |
442 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 443 | lo = lseg->pls_layout; |
e6cf82d1 | 444 | |
6543f803 TM |
445 | pnfs_free_lseg(lseg); |
446 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
447 | } |
448 | ||
6543f803 | 449 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 450 | { |
6543f803 | 451 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
452 | schedule_work(&lseg->pls_work); |
453 | } | |
6543f803 TM |
454 | |
455 | void | |
456 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
457 | { | |
458 | if (!lseg) | |
459 | return; | |
460 | ||
461 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
462 | ||
463 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
464 | atomic_read(&lseg->pls_refcount), | |
465 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
466 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
467 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
468 | pnfs_get_layout_hdr(lo); | |
469 | pnfs_layout_remove_lseg(lo, lseg); | |
470 | pnfs_free_lseg_async(lseg); | |
471 | } | |
472 | } | |
473 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 474 | |
3cb2df17 | 475 | static u64 |
fb3296eb BH |
476 | end_offset(u64 start, u64 len) |
477 | { | |
478 | u64 end; | |
479 | ||
480 | end = start + len; | |
481 | return end >= start ? end : NFS4_MAX_UINT64; | |
482 | } | |
483 | ||
fb3296eb BH |
484 | /* |
485 | * is l2 fully contained in l1? | |
486 | * start1 end1 | |
487 | * [----------------------------------) | |
488 | * start2 end2 | |
489 | * [----------------) | |
490 | */ | |
3cb2df17 | 491 | static bool |
7dc0ac70 | 492 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 493 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
494 | { |
495 | u64 start1 = l1->offset; | |
496 | u64 end1 = end_offset(start1, l1->length); | |
497 | u64 start2 = l2->offset; | |
498 | u64 end2 = end_offset(start2, l2->length); | |
499 | ||
500 | return (start1 <= start2) && (end1 >= end2); | |
501 | } | |
502 | ||
503 | /* | |
504 | * is l1 and l2 intersecting? | |
505 | * start1 end1 | |
506 | * [----------------------------------) | |
507 | * start2 end2 | |
508 | * [----------------) | |
509 | */ | |
3cb2df17 | 510 | static bool |
7dc0ac70 | 511 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 512 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
513 | { |
514 | u64 start1 = l1->offset; | |
515 | u64 end1 = end_offset(start1, l1->length); | |
516 | u64 start2 = l2->offset; | |
517 | u64 end2 = end_offset(start2, l2->length); | |
518 | ||
519 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
520 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
521 | } | |
522 | ||
4541d16c | 523 | static bool |
3cb2df17 TM |
524 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
525 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 526 | { |
778b5502 BH |
527 | return (recall_range->iomode == IOMODE_ANY || |
528 | lseg_range->iomode == recall_range->iomode) && | |
7dc0ac70 | 529 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
974cec8c AA |
530 | } |
531 | ||
24956804 TM |
532 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
533 | struct list_head *tmp_list) | |
534 | { | |
535 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
536 | return false; | |
537 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
538 | list_add(&lseg->pls_list, tmp_list); | |
539 | return true; | |
540 | } | |
541 | ||
4541d16c FI |
542 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
543 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
544 | struct list_head *tmp_list) | |
545 | { | |
546 | int rv = 0; | |
547 | ||
548 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
549 | /* Remove the reference keeping the lseg in the | |
550 | * list. It will now be removed when all | |
551 | * outstanding io is finished. | |
552 | */ | |
d684d2ae FI |
553 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
554 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 555 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 556 | rv = 1; |
4541d16c FI |
557 | } |
558 | return rv; | |
559 | } | |
560 | ||
561 | /* Returns count of number of matching invalid lsegs remaining in list | |
562 | * after call. | |
563 | */ | |
43f1b3da | 564 | int |
49a85061 | 565 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 566 | struct list_head *tmp_list, |
778b5502 | 567 | struct pnfs_layout_range *recall_range) |
974cec8c AA |
568 | { |
569 | struct pnfs_layout_segment *lseg, *next; | |
4541d16c | 570 | int invalid = 0, removed = 0; |
974cec8c AA |
571 | |
572 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
573 | ||
8006bfba | 574 | if (list_empty(&lo->plh_segs)) |
38511722 | 575 | return 0; |
4541d16c | 576 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
577 | if (!recall_range || |
578 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
579 | dprintk("%s: freeing lseg %p iomode %d " |
580 | "offset %llu length %llu\n", __func__, | |
581 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
582 | lseg->pls_range.length); | |
583 | invalid++; | |
584 | removed += mark_lseg_invalid(lseg, tmp_list); | |
585 | } | |
586 | dprintk("%s:Return %i\n", __func__, invalid - removed); | |
587 | return invalid - removed; | |
974cec8c AA |
588 | } |
589 | ||
f49f9baa | 590 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 591 | void |
4541d16c | 592 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 593 | { |
4541d16c | 594 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
595 | |
596 | if (list_empty(free_me)) | |
597 | return; | |
598 | ||
4541d16c | 599 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 600 | list_del(&lseg->pls_list); |
905ca191 | 601 | pnfs_free_lseg(lseg); |
974cec8c AA |
602 | } |
603 | } | |
604 | ||
e5e94017 BH |
605 | void |
606 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
607 | { | |
608 | struct pnfs_layout_hdr *lo; | |
974cec8c | 609 | LIST_HEAD(tmp_list); |
e5e94017 BH |
610 | |
611 | spin_lock(&nfsi->vfs_inode.i_lock); | |
612 | lo = nfsi->layout; | |
613 | if (lo) { | |
38511722 | 614 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
49a85061 | 615 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
3e621214 TM |
616 | pnfs_get_layout_hdr(lo); |
617 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); | |
618 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
c829013d | 619 | pnfs_clear_retry_layoutget(lo); |
3e621214 TM |
620 | spin_unlock(&nfsi->vfs_inode.i_lock); |
621 | pnfs_free_lseg_list(&tmp_list); | |
622 | pnfs_put_layout_hdr(lo); | |
623 | } else | |
624 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 625 | } |
041245c8 | 626 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 627 | |
fd9a8d71 TM |
628 | static bool |
629 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
630 | struct list_head *layout_list) | |
974cec8c AA |
631 | { |
632 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 633 | bool ret = false; |
974cec8c | 634 | |
fd9a8d71 TM |
635 | spin_lock(&inode->i_lock); |
636 | lo = NFS_I(inode)->layout; | |
637 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
638 | pnfs_get_layout_hdr(lo); | |
639 | list_add(&lo->plh_bulk_destroy, layout_list); | |
640 | ret = true; | |
641 | } | |
642 | spin_unlock(&inode->i_lock); | |
643 | return ret; | |
644 | } | |
645 | ||
646 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
647 | static int | |
648 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
649 | struct nfs_server *server, | |
650 | struct list_head *layout_list) | |
651 | { | |
652 | struct pnfs_layout_hdr *lo, *next; | |
653 | struct inode *inode; | |
654 | ||
655 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
656 | inode = igrab(lo->plh_inode); | |
657 | if (inode == NULL) | |
658 | continue; | |
659 | list_del_init(&lo->plh_layouts); | |
660 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
661 | continue; | |
662 | rcu_read_unlock(); | |
663 | spin_unlock(&clp->cl_lock); | |
664 | iput(inode); | |
665 | spin_lock(&clp->cl_lock); | |
666 | rcu_read_lock(); | |
667 | return -EAGAIN; | |
668 | } | |
669 | return 0; | |
670 | } | |
671 | ||
672 | static int | |
673 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
674 | bool is_bulk_recall) | |
675 | { | |
676 | struct pnfs_layout_hdr *lo; | |
677 | struct inode *inode; | |
678 | struct pnfs_layout_range range = { | |
679 | .iomode = IOMODE_ANY, | |
680 | .offset = 0, | |
681 | .length = NFS4_MAX_UINT64, | |
682 | }; | |
683 | LIST_HEAD(lseg_list); | |
684 | int ret = 0; | |
685 | ||
686 | while (!list_empty(layout_list)) { | |
687 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
688 | plh_bulk_destroy); | |
689 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
690 | lo->plh_inode->i_ino); | |
691 | inode = lo->plh_inode; | |
7c5d1875 CH |
692 | |
693 | pnfs_layoutcommit_inode(inode, false); | |
694 | ||
fd9a8d71 TM |
695 | spin_lock(&inode->i_lock); |
696 | list_del_init(&lo->plh_bulk_destroy); | |
697 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ | |
698 | if (is_bulk_recall) | |
699 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
700 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) | |
701 | ret = -EAGAIN; | |
702 | spin_unlock(&inode->i_lock); | |
703 | pnfs_free_lseg_list(&lseg_list); | |
704 | pnfs_put_layout_hdr(lo); | |
705 | iput(inode); | |
706 | } | |
707 | return ret; | |
708 | } | |
709 | ||
710 | int | |
711 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
712 | struct nfs_fsid *fsid, | |
713 | bool is_recall) | |
714 | { | |
715 | struct nfs_server *server; | |
716 | LIST_HEAD(layout_list); | |
c47abcf8 | 717 | |
974cec8c | 718 | spin_lock(&clp->cl_lock); |
6382a441 | 719 | rcu_read_lock(); |
fd9a8d71 | 720 | restart: |
6382a441 | 721 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
722 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
723 | continue; | |
724 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
725 | server, | |
726 | &layout_list) != 0) | |
727 | goto restart; | |
6382a441 WAA |
728 | } |
729 | rcu_read_unlock(); | |
974cec8c AA |
730 | spin_unlock(&clp->cl_lock); |
731 | ||
fd9a8d71 TM |
732 | if (list_empty(&layout_list)) |
733 | return 0; | |
734 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
735 | } | |
736 | ||
737 | int | |
738 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
739 | bool is_recall) | |
740 | { | |
741 | struct nfs_server *server; | |
742 | LIST_HEAD(layout_list); | |
743 | ||
744 | spin_lock(&clp->cl_lock); | |
745 | rcu_read_lock(); | |
746 | restart: | |
747 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
748 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
749 | server, | |
750 | &layout_list) != 0) | |
751 | goto restart; | |
974cec8c | 752 | } |
fd9a8d71 TM |
753 | rcu_read_unlock(); |
754 | spin_unlock(&clp->cl_lock); | |
755 | ||
756 | if (list_empty(&layout_list)) | |
757 | return 0; | |
758 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
759 | } | |
760 | ||
761 | /* | |
762 | * Called by the state manger to remove all layouts established under an | |
763 | * expired lease. | |
764 | */ | |
765 | void | |
766 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
767 | { | |
768 | nfs4_deviceid_mark_client_invalid(clp); | |
769 | nfs4_deviceid_purge_client(clp); | |
770 | ||
771 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
772 | } |
773 | ||
5a65503f TM |
774 | /* |
775 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
776 | * taking into account wraparound issues. | |
777 | */ | |
778 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
779 | { | |
2c64c57d | 780 | return (s32)(s1 - s2) > 0; |
5a65503f TM |
781 | } |
782 | ||
fd6002e9 | 783 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
784 | void |
785 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
786 | bool update_barrier) | |
b1f69b75 | 787 | { |
22aaf714 TM |
788 | u32 oldseq, newseq, new_barrier; |
789 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 790 | |
2d2f24ad TM |
791 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
792 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 793 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 794 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 795 | if (update_barrier) { |
22aaf714 | 796 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
797 | } else { |
798 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 799 | * "close" to the current seqids. |
43f1b3da | 800 | */ |
22aaf714 | 801 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 802 | } |
22aaf714 TM |
803 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
804 | lo->plh_barrier = new_barrier; | |
43f1b3da | 805 | } |
b1f69b75 AA |
806 | } |
807 | ||
cf7d63f1 | 808 | static bool |
19c54aba TM |
809 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
810 | const nfs4_stateid *stateid) | |
43f1b3da | 811 | { |
19c54aba | 812 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 813 | |
19c54aba TM |
814 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
815 | } | |
816 | ||
ce6ab4f2 PT |
817 | static bool |
818 | pnfs_layout_returning(const struct pnfs_layout_hdr *lo, | |
819 | struct pnfs_layout_range *range) | |
820 | { | |
821 | return test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) && | |
822 | (lo->plh_return_iomode == IOMODE_ANY || | |
823 | lo->plh_return_iomode == range->iomode); | |
824 | } | |
825 | ||
19c54aba TM |
826 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
827 | static bool | |
ce6ab4f2 PT |
828 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, |
829 | struct pnfs_layout_range *range, int lget) | |
19c54aba | 830 | { |
f7e8917a FI |
831 | return lo->plh_block_lgets || |
832 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
43f1b3da | 833 | (list_empty(&lo->plh_segs) && |
ce6ab4f2 PT |
834 | (atomic_read(&lo->plh_outstanding) > lget)) || |
835 | pnfs_layout_returning(lo, range); | |
cf7d63f1 FI |
836 | } |
837 | ||
fd6002e9 FI |
838 | int |
839 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
ce6ab4f2 | 840 | struct pnfs_layout_range *range, |
fd6002e9 | 841 | struct nfs4_state *open_state) |
b1f69b75 | 842 | { |
fd6002e9 | 843 | int status = 0; |
974cec8c | 844 | |
b1f69b75 | 845 | dprintk("--> %s\n", __func__); |
fd6002e9 | 846 | spin_lock(&lo->plh_inode->i_lock); |
ce6ab4f2 | 847 | if (pnfs_layoutgets_blocked(lo, range, 1)) { |
cf7d63f1 | 848 | status = -EAGAIN; |
5d422301 TM |
849 | } else if (!nfs4_valid_open_stateid(open_state)) { |
850 | status = -EBADF; | |
47abadef CH |
851 | } else if (list_empty(&lo->plh_segs) || |
852 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { | |
fd6002e9 FI |
853 | int seq; |
854 | ||
855 | do { | |
856 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 857 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
858 | } while (read_seqretry(&open_state->seqlock, seq)); |
859 | } else | |
f597c537 | 860 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 861 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 862 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 863 | return status; |
b1f69b75 AA |
864 | } |
865 | ||
866 | /* | |
867 | * Get layout from server. | |
868 | * for now, assume that whole file layouts are requested. | |
869 | * arg->offset: 0 | |
870 | * arg->length: all ones | |
871 | */ | |
e5e94017 BH |
872 | static struct pnfs_layout_segment * |
873 | send_layoutget(struct pnfs_layout_hdr *lo, | |
874 | struct nfs_open_context *ctx, | |
fb3296eb | 875 | struct pnfs_layout_range *range, |
a75b9df9 | 876 | gfp_t gfp_flags) |
e5e94017 | 877 | { |
b7edfaa1 | 878 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
879 | struct nfs_server *server = NFS_SERVER(ino); |
880 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 881 | struct pnfs_layout_segment *lseg; |
b1f69b75 AA |
882 | |
883 | dprintk("--> %s\n", __func__); | |
e5e94017 | 884 | |
a75b9df9 | 885 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
cf7d63f1 | 886 | if (lgp == NULL) |
b1f69b75 | 887 | return NULL; |
35124a09 | 888 | |
fb3296eb BH |
889 | lgp->args.minlength = PAGE_CACHE_SIZE; |
890 | if (lgp->args.minlength > range->length) | |
891 | lgp->args.minlength = range->length; | |
b1f69b75 | 892 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
fb3296eb | 893 | lgp->args.range = *range; |
b1f69b75 AA |
894 | lgp->args.type = server->pnfs_curr_ld->id; |
895 | lgp->args.inode = ino; | |
896 | lgp->args.ctx = get_nfs_open_context(ctx); | |
a75b9df9 | 897 | lgp->gfp_flags = gfp_flags; |
6ab59344 | 898 | lgp->cred = lo->plh_lc_cred; |
b1f69b75 AA |
899 | |
900 | /* Synchronously retrieve layout information from server and | |
901 | * store in lseg. | |
902 | */ | |
a0b0a6e3 TM |
903 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
904 | if (IS_ERR(lseg)) { | |
905 | switch (PTR_ERR(lseg)) { | |
906 | case -ENOMEM: | |
907 | case -ERESTARTSYS: | |
908 | break; | |
909 | default: | |
910 | /* remember that LAYOUTGET failed and suspend trying */ | |
b9e028fd | 911 | pnfs_layout_io_set_failed(lo, range->iomode); |
a0b0a6e3 TM |
912 | } |
913 | return NULL; | |
d67ae825 TH |
914 | } else |
915 | pnfs_layout_clear_fail_bit(lo, | |
916 | pnfs_iomode_to_fail_bit(range->iomode)); | |
35124a09 | 917 | |
974cec8c AA |
918 | return lseg; |
919 | } | |
920 | ||
24956804 TM |
921 | static void pnfs_clear_layoutcommit(struct inode *inode, |
922 | struct list_head *head) | |
923 | { | |
924 | struct nfs_inode *nfsi = NFS_I(inode); | |
925 | struct pnfs_layout_segment *lseg, *tmp; | |
926 | ||
927 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
928 | return; | |
929 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
930 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
931 | continue; | |
932 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
933 | } | |
934 | } | |
935 | ||
d67ae825 TH |
936 | void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
937 | { | |
938 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
939 | smp_mb__after_atomic(); | |
940 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
941 | } | |
942 | ||
f40eb5d0 PT |
943 | static int |
944 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, | |
6c16605d | 945 | enum pnfs_iomode iomode, bool sync) |
f40eb5d0 PT |
946 | { |
947 | struct inode *ino = lo->plh_inode; | |
948 | struct nfs4_layoutreturn *lrp; | |
949 | int status = 0; | |
950 | ||
951 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); | |
952 | if (unlikely(lrp == NULL)) { | |
953 | status = -ENOMEM; | |
954 | spin_lock(&ino->i_lock); | |
955 | lo->plh_block_lgets--; | |
d67ae825 | 956 | pnfs_clear_layoutreturn_waitbit(lo); |
193e3aa2 | 957 | rpc_wake_up(&NFS_SERVER(ino)->roc_rpcwaitq); |
f40eb5d0 PT |
958 | spin_unlock(&ino->i_lock); |
959 | pnfs_put_layout_hdr(lo); | |
960 | goto out; | |
961 | } | |
962 | ||
963 | lrp->args.stateid = stateid; | |
964 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; | |
965 | lrp->args.inode = ino; | |
15eb67c1 PT |
966 | lrp->args.range.iomode = iomode; |
967 | lrp->args.range.offset = 0; | |
968 | lrp->args.range.length = NFS4_MAX_UINT64; | |
f40eb5d0 PT |
969 | lrp->args.layout = lo; |
970 | lrp->clp = NFS_SERVER(ino)->nfs_client; | |
971 | lrp->cred = lo->plh_lc_cred; | |
972 | ||
6c16605d | 973 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
974 | out: |
975 | dprintk("<-- %s status: %d\n", __func__, status); | |
976 | return status; | |
977 | } | |
978 | ||
293b3b06 AA |
979 | /* |
980 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
981 | * when the layout segment list is empty. | |
982 | * | |
983 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
984 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
985 | * deviceid is marked invalid. | |
986 | */ | |
cbe82603 BH |
987 | int |
988 | _pnfs_return_layout(struct inode *ino) | |
989 | { | |
990 | struct pnfs_layout_hdr *lo = NULL; | |
991 | struct nfs_inode *nfsi = NFS_I(ino); | |
992 | LIST_HEAD(tmp_list); | |
cbe82603 | 993 | nfs4_stateid stateid; |
293b3b06 | 994 | int status = 0, empty; |
cbe82603 | 995 | |
366d5052 | 996 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
997 | |
998 | spin_lock(&ino->i_lock); | |
999 | lo = nfsi->layout; | |
e5929f3c | 1000 | if (!lo) { |
cbe82603 | 1001 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
1002 | dprintk("NFS: %s no layout to return\n", __func__); |
1003 | goto out; | |
cbe82603 BH |
1004 | } |
1005 | stateid = nfsi->layout->plh_stateid; | |
1006 | /* Reference matched in nfs4_layoutreturn_release */ | |
70c3bd2b | 1007 | pnfs_get_layout_hdr(lo); |
293b3b06 | 1008 | empty = list_empty(&lo->plh_segs); |
24956804 | 1009 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 1010 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
c88953d8 CH |
1011 | |
1012 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
1013 | struct pnfs_layout_range range = { | |
1014 | .iomode = IOMODE_ANY, | |
1015 | .offset = 0, | |
1016 | .length = NFS4_MAX_UINT64, | |
1017 | }; | |
1018 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1019 | } | |
1020 | ||
293b3b06 AA |
1021 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
1022 | if (empty) { | |
1023 | spin_unlock(&ino->i_lock); | |
70c3bd2b | 1024 | pnfs_put_layout_hdr(lo); |
293b3b06 AA |
1025 | dprintk("NFS: %s no layout segments to return\n", __func__); |
1026 | goto out; | |
1027 | } | |
47abadef CH |
1028 | |
1029 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
ea0ded74 | 1030 | lo->plh_block_lgets++; |
cbe82603 BH |
1031 | spin_unlock(&ino->i_lock); |
1032 | pnfs_free_lseg_list(&tmp_list); | |
1033 | ||
6c16605d | 1034 | status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true); |
cbe82603 BH |
1035 | out: |
1036 | dprintk("<-- %s status: %d\n", __func__, status); | |
1037 | return status; | |
1038 | } | |
0a57cdac | 1039 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 1040 | |
24028672 TM |
1041 | int |
1042 | pnfs_commit_and_return_layout(struct inode *inode) | |
1043 | { | |
1044 | struct pnfs_layout_hdr *lo; | |
1045 | int ret; | |
1046 | ||
1047 | spin_lock(&inode->i_lock); | |
1048 | lo = NFS_I(inode)->layout; | |
1049 | if (lo == NULL) { | |
1050 | spin_unlock(&inode->i_lock); | |
1051 | return 0; | |
1052 | } | |
1053 | pnfs_get_layout_hdr(lo); | |
1054 | /* Block new layoutgets and read/write to ds */ | |
1055 | lo->plh_block_lgets++; | |
1056 | spin_unlock(&inode->i_lock); | |
1057 | filemap_fdatawait(inode->i_mapping); | |
1058 | ret = pnfs_layoutcommit_inode(inode, true); | |
1059 | if (ret == 0) | |
1060 | ret = _pnfs_return_layout(inode); | |
1061 | spin_lock(&inode->i_lock); | |
1062 | lo->plh_block_lgets--; | |
1063 | spin_unlock(&inode->i_lock); | |
1064 | pnfs_put_layout_hdr(lo); | |
1065 | return ret; | |
1066 | } | |
1067 | ||
f7e8917a FI |
1068 | bool pnfs_roc(struct inode *ino) |
1069 | { | |
40dd4b7a TM |
1070 | struct nfs_inode *nfsi = NFS_I(ino); |
1071 | struct nfs_open_context *ctx; | |
1072 | struct nfs4_state *state; | |
f7e8917a FI |
1073 | struct pnfs_layout_hdr *lo; |
1074 | struct pnfs_layout_segment *lseg, *tmp; | |
193e3aa2 | 1075 | nfs4_stateid stateid; |
f7e8917a | 1076 | LIST_HEAD(tmp_list); |
193e3aa2 | 1077 | bool found = false, layoutreturn = false; |
f7e8917a FI |
1078 | |
1079 | spin_lock(&ino->i_lock); | |
40dd4b7a | 1080 | lo = nfsi->layout; |
f7e8917a FI |
1081 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || |
1082 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) | |
40dd4b7a TM |
1083 | goto out_noroc; |
1084 | ||
1085 | /* Don't return layout if we hold a delegation */ | |
1086 | if (nfs4_check_delegation(ino, FMODE_READ)) | |
1087 | goto out_noroc; | |
1088 | ||
1089 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1090 | state = ctx->state; | |
1091 | /* Don't return layout if there is open file state */ | |
1092 | if (state != NULL && state->state != 0) | |
1093 | goto out_noroc; | |
1094 | } | |
1095 | ||
e2c63e09 | 1096 | goto out_noroc; |
c829013d | 1097 | pnfs_clear_retry_layoutget(lo); |
f7e8917a FI |
1098 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
1099 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
1100 | mark_lseg_invalid(lseg, &tmp_list); | |
1101 | found = true; | |
1102 | } | |
1103 | if (!found) | |
40dd4b7a | 1104 | goto out_noroc; |
f7e8917a | 1105 | lo->plh_block_lgets++; |
70c3bd2b | 1106 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
f7e8917a FI |
1107 | spin_unlock(&ino->i_lock); |
1108 | pnfs_free_lseg_list(&tmp_list); | |
1109 | return true; | |
1110 | ||
40dd4b7a | 1111 | out_noroc: |
193e3aa2 PT |
1112 | if (lo) { |
1113 | stateid = lo->plh_stateid; | |
1114 | layoutreturn = | |
1115 | test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, | |
1116 | &lo->plh_flags); | |
1117 | if (layoutreturn) { | |
1118 | lo->plh_block_lgets++; | |
1119 | pnfs_get_layout_hdr(lo); | |
1120 | } | |
1121 | } | |
f7e8917a | 1122 | spin_unlock(&ino->i_lock); |
193e3aa2 | 1123 | if (layoutreturn) |
27b6f539 | 1124 | pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true); |
f7e8917a FI |
1125 | return false; |
1126 | } | |
1127 | ||
1128 | void pnfs_roc_release(struct inode *ino) | |
1129 | { | |
1130 | struct pnfs_layout_hdr *lo; | |
1131 | ||
1132 | spin_lock(&ino->i_lock); | |
1133 | lo = NFS_I(ino)->layout; | |
1134 | lo->plh_block_lgets--; | |
6622c3ea TM |
1135 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1136 | pnfs_detach_layout_hdr(lo); | |
1137 | spin_unlock(&ino->i_lock); | |
1138 | pnfs_free_layout_hdr(lo); | |
1139 | } else | |
1140 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1141 | } |
1142 | ||
1143 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1144 | { | |
1145 | struct pnfs_layout_hdr *lo; | |
1146 | ||
1147 | spin_lock(&ino->i_lock); | |
1148 | lo = NFS_I(ino)->layout; | |
0f35ad6f | 1149 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1150 | lo->plh_barrier = barrier; |
1151 | spin_unlock(&ino->i_lock); | |
1152 | } | |
1153 | ||
7fdab069 | 1154 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
f7e8917a FI |
1155 | { |
1156 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1157 | struct pnfs_layout_hdr *lo; |
f7e8917a | 1158 | struct pnfs_layout_segment *lseg; |
193e3aa2 | 1159 | nfs4_stateid stateid; |
7fdab069 | 1160 | u32 current_seqid; |
193e3aa2 | 1161 | bool found = false, layoutreturn = false; |
f7e8917a FI |
1162 | |
1163 | spin_lock(&ino->i_lock); | |
1164 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) | |
1165 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
7fdab069 | 1166 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
f7e8917a | 1167 | found = true; |
7fdab069 | 1168 | goto out; |
f7e8917a | 1169 | } |
7fdab069 TM |
1170 | lo = nfsi->layout; |
1171 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1172 | |
7fdab069 TM |
1173 | /* Since close does not return a layout stateid for use as |
1174 | * a barrier, we choose the worst-case barrier. | |
1175 | */ | |
1176 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
1177 | out: | |
193e3aa2 PT |
1178 | if (!found) { |
1179 | stateid = lo->plh_stateid; | |
1180 | layoutreturn = | |
1181 | test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, | |
1182 | &lo->plh_flags); | |
1183 | if (layoutreturn) { | |
1184 | lo->plh_block_lgets++; | |
1185 | pnfs_get_layout_hdr(lo); | |
1186 | } | |
1187 | } | |
f7e8917a | 1188 | spin_unlock(&ino->i_lock); |
193e3aa2 PT |
1189 | if (layoutreturn) { |
1190 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
27b6f539 | 1191 | pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, false); |
193e3aa2 | 1192 | } |
f7e8917a FI |
1193 | return found; |
1194 | } | |
1195 | ||
b1f69b75 AA |
1196 | /* |
1197 | * Compare two layout segments for sorting into layout cache. | |
1198 | * We want to preferentially return RW over RO layouts, so ensure those | |
1199 | * are seen first. | |
1200 | */ | |
1201 | static s64 | |
7dc0ac70 | 1202 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1203 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1204 | { |
fb3296eb BH |
1205 | s64 d; |
1206 | ||
1207 | /* high offset > low offset */ | |
1208 | d = l1->offset - l2->offset; | |
1209 | if (d) | |
1210 | return d; | |
1211 | ||
1212 | /* short length > long length */ | |
1213 | d = l2->length - l1->length; | |
1214 | if (d) | |
1215 | return d; | |
1216 | ||
b1f69b75 | 1217 | /* read > read/write */ |
fb3296eb | 1218 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1219 | } |
1220 | ||
974cec8c | 1221 | static void |
57036a37 | 1222 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
974cec8c AA |
1223 | struct pnfs_layout_segment *lseg) |
1224 | { | |
b1f69b75 | 1225 | struct pnfs_layout_segment *lp; |
b1f69b75 | 1226 | |
974cec8c AA |
1227 | dprintk("%s:Begin\n", __func__); |
1228 | ||
b7edfaa1 | 1229 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
7dc0ac70 | 1230 | if (pnfs_lseg_range_cmp(&lseg->pls_range, &lp->pls_range) > 0) |
b1f69b75 | 1231 | continue; |
566052c5 | 1232 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1233 | dprintk("%s: inserted lseg %p " |
1234 | "iomode %d offset %llu length %llu before " | |
1235 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1236 | __func__, lseg, lseg->pls_range.iomode, |
1237 | lseg->pls_range.offset, lseg->pls_range.length, | |
1238 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1239 | lp->pls_range.length); | |
fb3296eb | 1240 | goto out; |
974cec8c | 1241 | } |
fb3296eb BH |
1242 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1243 | dprintk("%s: inserted lseg %p " | |
1244 | "iomode %d offset %llu length %llu at tail\n", | |
1245 | __func__, lseg, lseg->pls_range.iomode, | |
1246 | lseg->pls_range.offset, lseg->pls_range.length); | |
1247 | out: | |
70c3bd2b | 1248 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1249 | |
1250 | dprintk("%s:Return\n", __func__); | |
e5e94017 BH |
1251 | } |
1252 | ||
1253 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1254 | alloc_init_layout_hdr(struct inode *ino, |
1255 | struct nfs_open_context *ctx, | |
1256 | gfp_t gfp_flags) | |
e5e94017 BH |
1257 | { |
1258 | struct pnfs_layout_hdr *lo; | |
1259 | ||
636fb9c8 | 1260 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1261 | if (!lo) |
1262 | return NULL; | |
cc6e5340 | 1263 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1264 | INIT_LIST_HEAD(&lo->plh_layouts); |
1265 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1266 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1267 | lo->plh_inode = ino; |
5cc2216d | 1268 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1269 | return lo; |
1270 | } | |
1271 | ||
1272 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1273 | pnfs_find_alloc_layout(struct inode *ino, |
1274 | struct nfs_open_context *ctx, | |
1275 | gfp_t gfp_flags) | |
e5e94017 BH |
1276 | { |
1277 | struct nfs_inode *nfsi = NFS_I(ino); | |
1278 | struct pnfs_layout_hdr *new = NULL; | |
1279 | ||
1280 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1281 | ||
251ec410 TM |
1282 | if (nfsi->layout != NULL) |
1283 | goto out_existing; | |
e5e94017 | 1284 | spin_unlock(&ino->i_lock); |
9fa40758 | 1285 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1286 | spin_lock(&ino->i_lock); |
1287 | ||
251ec410 | 1288 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1289 | nfsi->layout = new; |
251ec410 | 1290 | return new; |
7175fe90 YN |
1291 | } else if (new != NULL) |
1292 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1293 | out_existing: |
1294 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1295 | return nfsi->layout; |
1296 | } | |
1297 | ||
b1f69b75 AA |
1298 | /* |
1299 | * iomode matching rules: | |
1300 | * iomode lseg match | |
1301 | * ----- ----- ----- | |
1302 | * ANY READ true | |
1303 | * ANY RW true | |
1304 | * RW READ false | |
1305 | * RW RW true | |
1306 | * READ READ true | |
1307 | * READ RW true | |
1308 | */ | |
3cb2df17 | 1309 | static bool |
7dc0ac70 | 1310 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
3cb2df17 | 1311 | const struct pnfs_layout_range *range) |
b1f69b75 | 1312 | { |
fb3296eb BH |
1313 | struct pnfs_layout_range range1; |
1314 | ||
1315 | if ((range->iomode == IOMODE_RW && | |
1316 | ls_range->iomode != IOMODE_RW) || | |
7dc0ac70 | 1317 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1318 | return 0; |
1319 | ||
1320 | /* range1 covers only the first byte in the range */ | |
1321 | range1 = *range; | |
1322 | range1.length = 1; | |
7dc0ac70 | 1323 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1324 | } |
1325 | ||
1326 | /* | |
1327 | * lookup range in layout | |
1328 | */ | |
e5e94017 | 1329 | static struct pnfs_layout_segment * |
fb3296eb BH |
1330 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1331 | struct pnfs_layout_range *range) | |
e5e94017 | 1332 | { |
b1f69b75 AA |
1333 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1334 | ||
1335 | dprintk("%s:Begin\n", __func__); | |
1336 | ||
b7edfaa1 | 1337 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1338 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1339 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
7dc0ac70 | 1340 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
9369a431 | 1341 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1342 | break; |
1343 | } | |
d771e3a4 | 1344 | if (lseg->pls_range.offset > range->offset) |
b1f69b75 AA |
1345 | break; |
1346 | } | |
1347 | ||
1348 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1349 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1350 | return ret; |
e5e94017 BH |
1351 | } |
1352 | ||
d23d61c8 AA |
1353 | /* |
1354 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1355 | * to the MDS or over pNFS | |
1356 | * | |
1357 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1358 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1359 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1360 | * WRITE request. | |
1361 | * | |
1362 | * A return of true means use MDS I/O. | |
1363 | * | |
1364 | * From rfc 5661: | |
1365 | * If a file's size is smaller than the file size threshold, data accesses | |
1366 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1367 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1368 | * server. If both file size and I/O size are provided, the client SHOULD | |
1369 | * reach or exceed both thresholds before sending its read or write | |
1370 | * requests to the data server. | |
1371 | */ | |
1372 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1373 | struct inode *ino, int iomode) | |
1374 | { | |
1375 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1376 | struct nfs_inode *nfsi = NFS_I(ino); | |
1377 | loff_t fsize = i_size_read(ino); | |
1378 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1379 | ||
1380 | if (t == NULL) | |
1381 | return ret; | |
1382 | ||
1383 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1384 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1385 | ||
1386 | switch (iomode) { | |
1387 | case IOMODE_READ: | |
1388 | if (t->bm & THRESHOLD_RD) { | |
1389 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1390 | size_set = true; | |
1391 | if (fsize < t->rd_sz) | |
1392 | size = true; | |
1393 | } | |
1394 | if (t->bm & THRESHOLD_RD_IO) { | |
1395 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1396 | nfsi->read_io); | |
1397 | io_set = true; | |
1398 | if (nfsi->read_io < t->rd_io_sz) | |
1399 | io = true; | |
1400 | } | |
1401 | break; | |
1402 | case IOMODE_RW: | |
1403 | if (t->bm & THRESHOLD_WR) { | |
1404 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1405 | size_set = true; | |
1406 | if (fsize < t->wr_sz) | |
1407 | size = true; | |
1408 | } | |
1409 | if (t->bm & THRESHOLD_WR_IO) { | |
1410 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1411 | nfsi->write_io); | |
1412 | io_set = true; | |
1413 | if (nfsi->write_io < t->wr_io_sz) | |
1414 | io = true; | |
1415 | } | |
1416 | break; | |
1417 | } | |
1418 | if (size_set && io_set) { | |
1419 | if (size && io) | |
1420 | ret = true; | |
1421 | } else if (size || io) | |
1422 | ret = true; | |
1423 | ||
1424 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1425 | return ret; | |
1426 | } | |
1427 | ||
aa8a45ee PT |
1428 | /* stop waiting if someone clears NFS_LAYOUT_RETRY_LAYOUTGET bit. */ |
1429 | static int pnfs_layoutget_retry_bit_wait(struct wait_bit_key *key) | |
1430 | { | |
1431 | if (!test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, key->flags)) | |
1432 | return 1; | |
1433 | return nfs_wait_bit_killable(key); | |
1434 | } | |
1435 | ||
1436 | static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) | |
1437 | { | |
1438 | /* | |
1439 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1440 | * reference | |
1441 | */ | |
1442 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
1443 | return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
1444 | pnfs_layoutget_retry_bit_wait, | |
1445 | TASK_UNINTERRUPTIBLE); | |
1446 | } | |
1447 | ||
d67ae825 TH |
1448 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1449 | { | |
1450 | unsigned long *bitlock = &lo->plh_flags; | |
1451 | ||
1452 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1453 | smp_mb__after_atomic(); | |
1454 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1455 | } | |
1456 | ||
e5e94017 BH |
1457 | /* |
1458 | * Layout segment is retreived from the server if not cached. | |
1459 | * The appropriate layout segment is referenced and returned to the caller. | |
1460 | */ | |
7c24d948 | 1461 | struct pnfs_layout_segment * |
e5e94017 BH |
1462 | pnfs_update_layout(struct inode *ino, |
1463 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1464 | loff_t pos, |
1465 | u64 count, | |
a75b9df9 TM |
1466 | enum pnfs_iomode iomode, |
1467 | gfp_t gfp_flags) | |
e5e94017 | 1468 | { |
fb3296eb BH |
1469 | struct pnfs_layout_range arg = { |
1470 | .iomode = iomode, | |
1471 | .offset = pos, | |
1472 | .length = count, | |
1473 | }; | |
707ed5fd | 1474 | unsigned pg_offset; |
6382a441 WAA |
1475 | struct nfs_server *server = NFS_SERVER(ino); |
1476 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1477 | struct pnfs_layout_hdr *lo; |
1478 | struct pnfs_layout_segment *lseg = NULL; | |
30005121 | 1479 | bool first; |
e5e94017 BH |
1480 | |
1481 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) | |
f86bbcf8 | 1482 | goto out; |
d23d61c8 AA |
1483 | |
1484 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) | |
f86bbcf8 | 1485 | goto out; |
d23d61c8 | 1486 | |
9bf87482 PT |
1487 | lookup_again: |
1488 | first = false; | |
e5e94017 | 1489 | spin_lock(&ino->i_lock); |
9fa40758 | 1490 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1491 | if (lo == NULL) { |
1492 | spin_unlock(&ino->i_lock); | |
1493 | goto out; | |
1494 | } | |
e5e94017 | 1495 | |
43f1b3da | 1496 | /* Do we even need to bother with this? */ |
a59c30ac | 1497 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da | 1498 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1499 | goto out_unlock; |
1500 | } | |
1501 | ||
1502 | /* if LAYOUTGET already failed once we don't try again */ | |
aa8a45ee PT |
1503 | if (pnfs_layout_io_test_failed(lo, iomode) && |
1504 | !pnfs_should_retry_layoutget(lo)) | |
e5e94017 BH |
1505 | goto out_unlock; |
1506 | ||
9bf87482 PT |
1507 | first = list_empty(&lo->plh_segs); |
1508 | if (first) { | |
1509 | /* The first layoutget for the file. Need to serialize per | |
1510 | * RFC 5661 Errata 3208. | |
1511 | */ | |
1512 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1513 | &lo->plh_flags)) { | |
1514 | spin_unlock(&ino->i_lock); | |
1515 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1516 | TASK_UNINTERRUPTIBLE); | |
1517 | pnfs_put_layout_hdr(lo); | |
1518 | goto lookup_again; | |
1519 | } | |
1520 | } else { | |
1521 | /* Check to see if the layout for the given range | |
1522 | * already exists | |
1523 | */ | |
1524 | lseg = pnfs_find_lseg(lo, &arg); | |
1525 | if (lseg) | |
1526 | goto out_unlock; | |
1527 | } | |
568e8c49 | 1528 | |
aa8a45ee PT |
1529 | /* |
1530 | * Because we free lsegs before sending LAYOUTRETURN, we need to wait | |
1531 | * for LAYOUTRETURN even if first is true. | |
1532 | */ | |
1533 | if (!lseg && pnfs_should_retry_layoutget(lo) && | |
1534 | test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { | |
1535 | spin_unlock(&ino->i_lock); | |
1536 | dprintk("%s wait for layoutreturn\n", __func__); | |
1537 | if (pnfs_prepare_to_retry_layoutget(lo)) { | |
d67ae825 TH |
1538 | if (first) |
1539 | pnfs_clear_first_layoutget(lo); | |
aa8a45ee PT |
1540 | pnfs_put_layout_hdr(lo); |
1541 | dprintk("%s retrying\n", __func__); | |
1542 | goto lookup_again; | |
1543 | } | |
1544 | goto out_put_layout_hdr; | |
1545 | } | |
1546 | ||
ce6ab4f2 | 1547 | if (pnfs_layoutgets_blocked(lo, &arg, 0)) |
cf7d63f1 FI |
1548 | goto out_unlock; |
1549 | atomic_inc(&lo->plh_outstanding); | |
f49f9baa | 1550 | spin_unlock(&ino->i_lock); |
30005121 | 1551 | |
abb9a007 | 1552 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1553 | /* The lo must be on the clp list if there is any |
1554 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1555 | */ | |
1556 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1557 | if (list_empty(&lo->plh_layouts)) |
1558 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1559 | spin_unlock(&clp->cl_lock); |
1560 | } | |
e5e94017 | 1561 | |
707ed5fd BH |
1562 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1563 | if (pg_offset) { | |
1564 | arg.offset -= pg_offset; | |
1565 | arg.length += pg_offset; | |
1566 | } | |
7c24d948 AA |
1567 | if (arg.length != NFS4_MAX_UINT64) |
1568 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1569 | |
fb3296eb | 1570 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
c829013d | 1571 | pnfs_clear_retry_layoutget(lo); |
cf7d63f1 | 1572 | atomic_dec(&lo->plh_outstanding); |
830ffb56 | 1573 | out_put_layout_hdr: |
d67ae825 TH |
1574 | if (first) |
1575 | pnfs_clear_first_layoutget(lo); | |
70c3bd2b | 1576 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1577 | out: |
f86bbcf8 TM |
1578 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1579 | "(%s, offset: %llu, length: %llu)\n", | |
1580 | __func__, ino->i_sb->s_id, | |
1581 | (unsigned long long)NFS_FILEID(ino), | |
1582 | lseg == NULL ? "not found" : "found", | |
1583 | iomode==IOMODE_RW ? "read/write" : "read-only", | |
1584 | (unsigned long long)pos, | |
1585 | (unsigned long long)count); | |
e5e94017 BH |
1586 | return lseg; |
1587 | out_unlock: | |
1588 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1589 | goto out_put_layout_hdr; |
e5e94017 | 1590 | } |
7c24d948 | 1591 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1592 | |
a0b0a6e3 | 1593 | struct pnfs_layout_segment * |
b1f69b75 AA |
1594 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1595 | { | |
1596 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1597 | struct nfs4_layoutget_res *res = &lgp->res; | |
1598 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1599 | struct inode *ino = lo->plh_inode; |
78096cca | 1600 | LIST_HEAD(free_me); |
b1f69b75 AA |
1601 | int status = 0; |
1602 | ||
1603 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1604 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1605 | if (!lseg || IS_ERR(lseg)) { |
1606 | if (!lseg) | |
1607 | status = -ENOMEM; | |
1608 | else | |
1609 | status = PTR_ERR(lseg); | |
1610 | dprintk("%s: Could not allocate layout: error %d\n", | |
1611 | __func__, status); | |
1612 | goto out; | |
1613 | } | |
1614 | ||
1013df61 CH |
1615 | init_lseg(lo, lseg); |
1616 | lseg->pls_range = res->range; | |
1617 | ||
b1f69b75 | 1618 | spin_lock(&ino->i_lock); |
a59c30ac | 1619 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da FI |
1620 | dprintk("%s forget reply due to recall\n", __func__); |
1621 | goto out_forget_reply; | |
1622 | } | |
1623 | ||
ce6ab4f2 | 1624 | if (pnfs_layoutgets_blocked(lo, &lgp->args.range, 1)) { |
43f1b3da FI |
1625 | dprintk("%s forget reply due to state\n", __func__); |
1626 | goto out_forget_reply; | |
1627 | } | |
038d6493 | 1628 | |
362f7474 CH |
1629 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1630 | /* existing state ID, make sure the sequence number matches. */ | |
1631 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1632 | dprintk("%s forget reply due to sequence\n", __func__); | |
1633 | goto out_forget_reply; | |
1634 | } | |
1635 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1636 | } else { | |
1637 | /* | |
1638 | * We got an entirely new state ID. Mark all segments for the | |
1639 | * inode invalid, and don't bother validating the stateid | |
1640 | * sequence number. | |
1641 | */ | |
1642 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); | |
1643 | ||
1644 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1645 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1646 | } | |
038d6493 | 1647 | |
47abadef CH |
1648 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
1649 | ||
9369a431 | 1650 | pnfs_get_lseg(lseg); |
57036a37 | 1651 | pnfs_layout_insert_lseg(lo, lseg); |
b1f69b75 | 1652 | |
f7e8917a FI |
1653 | if (res->return_on_close) { |
1654 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
1655 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); | |
1656 | } | |
1657 | ||
b1f69b75 | 1658 | spin_unlock(&ino->i_lock); |
78096cca | 1659 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1660 | return lseg; |
b1f69b75 | 1661 | out: |
a0b0a6e3 | 1662 | return ERR_PTR(status); |
43f1b3da FI |
1663 | |
1664 | out_forget_reply: | |
1665 | spin_unlock(&ino->i_lock); | |
1666 | lseg->pls_layout = lo; | |
1667 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1668 | goto out; | |
b1f69b75 AA |
1669 | } |
1670 | ||
016256df PT |
1671 | static void |
1672 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, | |
1673 | struct list_head *tmp_list, | |
1674 | struct pnfs_layout_range *return_range) | |
1675 | { | |
1676 | struct pnfs_layout_segment *lseg, *next; | |
1677 | ||
1678 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
1679 | ||
1680 | if (list_empty(&lo->plh_segs)) | |
1681 | return; | |
1682 | ||
1683 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
1684 | if (should_free_lseg(&lseg->pls_range, return_range)) { | |
1685 | dprintk("%s: marking lseg %p iomode %d " | |
1686 | "offset %llu length %llu\n", __func__, | |
1687 | lseg, lseg->pls_range.iomode, | |
1688 | lseg->pls_range.offset, | |
1689 | lseg->pls_range.length); | |
1690 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
1691 | mark_lseg_invalid(lseg, tmp_list); | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
1696 | struct pnfs_layout_segment *lseg) | |
1697 | { | |
1698 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
1699 | int iomode = pnfs_iomode_to_fail_bit(lseg->pls_range.iomode); | |
1700 | struct pnfs_layout_range range = { | |
1701 | .iomode = lseg->pls_range.iomode, | |
1702 | .offset = 0, | |
1703 | .length = NFS4_MAX_UINT64, | |
1704 | }; | |
1705 | LIST_HEAD(free_me); | |
1706 | ||
1707 | spin_lock(&inode->i_lock); | |
1708 | /* set failure bit so that pnfs path will be retried later */ | |
1709 | pnfs_layout_set_fail_bit(lo, iomode); | |
1710 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
1711 | if (lo->plh_return_iomode == 0) | |
1712 | lo->plh_return_iomode = range.iomode; | |
1713 | else if (lo->plh_return_iomode != range.iomode) | |
1714 | lo->plh_return_iomode = IOMODE_ANY; | |
1715 | /* | |
1716 | * mark all matching lsegs so that we are sure to have no live | |
1717 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
1718 | * for how it works. | |
1719 | */ | |
1720 | pnfs_mark_matching_lsegs_return(lo, &free_me, &range); | |
1721 | spin_unlock(&inode->i_lock); | |
1722 | pnfs_free_lseg_list(&free_me); | |
1723 | } | |
1724 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
1725 | ||
d8007d4d TM |
1726 | void |
1727 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1728 | { | |
1fd937bd PT |
1729 | u64 rd_size = req->wb_bytes; |
1730 | ||
cb5d04bc PT |
1731 | if (pgio->pg_lseg == NULL) { |
1732 | if (pgio->pg_dreq == NULL) | |
1733 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1734 | else | |
1735 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1736 | ||
1737 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1738 | req->wb_context, | |
1739 | req_offset(req), | |
1740 | rd_size, | |
1741 | IOMODE_READ, | |
1742 | GFP_KERNEL); | |
1743 | } | |
e885de1a TM |
1744 | /* If no lseg, fall back to read through mds */ |
1745 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1746 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1747 | |
d8007d4d TM |
1748 | } |
1749 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1750 | ||
1751 | void | |
6296556f PT |
1752 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1753 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1754 | { |
cb5d04bc PT |
1755 | if (pgio->pg_lseg == NULL) |
1756 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1757 | req->wb_context, | |
1758 | req_offset(req), | |
1759 | wb_size, | |
1760 | IOMODE_RW, | |
1761 | GFP_NOFS); | |
e885de1a TM |
1762 | /* If no lseg, fall back to write through mds */ |
1763 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1764 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1765 | } |
1766 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1767 | ||
180bb5ec WAA |
1768 | void |
1769 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
1770 | { | |
1771 | if (desc->pg_lseg) { | |
1772 | pnfs_put_lseg(desc->pg_lseg); | |
1773 | desc->pg_lseg = NULL; | |
1774 | } | |
1775 | } | |
1776 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
1777 | ||
b4fdac1a WAA |
1778 | /* |
1779 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1780 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1781 | */ | |
1782 | size_t | |
a7d42ddb WAA |
1783 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
1784 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 1785 | { |
0f9c429e | 1786 | unsigned int size; |
c5e20cb7 | 1787 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1788 | |
1789 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1790 | if (!size) |
1791 | return 0; | |
94ad1c80 | 1792 | |
19982ba8 | 1793 | /* |
c5e20cb7 WAA |
1794 | * 'size' contains the number of bytes left in the current page (up |
1795 | * to the original size asked for in @req->wb_bytes). | |
1796 | * | |
1797 | * Calculate how many bytes are left in the layout segment | |
1798 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1799 | * |
1800 | * Please also note that 'end_offset' is actually the offset of the | |
1801 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1802 | * | |
1803 | */ | |
19b54848 | 1804 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
1805 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
1806 | pgio->pg_lseg->pls_range.length); | |
1807 | req_start = req_offset(req); | |
7c13789e | 1808 | WARN_ON_ONCE(req_start >= seg_end); |
c5e20cb7 | 1809 | /* start of request is past the last byte of this segment */ |
7c13789e WAA |
1810 | if (req_start >= seg_end) { |
1811 | /* reference the new lseg */ | |
1812 | if (pgio->pg_ops->pg_cleanup) | |
1813 | pgio->pg_ops->pg_cleanup(pgio); | |
1814 | if (pgio->pg_ops->pg_init) | |
1815 | pgio->pg_ops->pg_init(pgio, req); | |
19b54848 | 1816 | return 0; |
7c13789e | 1817 | } |
c5e20cb7 WAA |
1818 | |
1819 | /* adjust 'size' iff there are fewer bytes left in the | |
1820 | * segment than what nfs_generic_pg_test returned */ | |
1821 | seg_left = seg_end - req_start; | |
1822 | if (seg_left < size) | |
1823 | size = (unsigned int)seg_left; | |
19b54848 | 1824 | } |
0f9c429e | 1825 | |
19b54848 | 1826 | return size; |
94ad1c80 | 1827 | } |
89a58e32 | 1828 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1829 | |
53113ad3 | 1830 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
1831 | { |
1832 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
1833 | |
1834 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
1835 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
1836 | hdr->completion_ops); | |
1837 | return nfs_pageio_resend(&pgio, hdr); | |
e2fecb21 | 1838 | } |
e7dd79af | 1839 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1840 | |
d45f60c6 | 1841 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1842 | { |
cd841605 FI |
1843 | |
1844 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1845 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1846 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1847 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1848 | } |
6c75dc0d | 1849 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1850 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
1851 | } |
1852 | ||
d20581aa BH |
1853 | /* |
1854 | * Called by non rpc-based layout drivers | |
1855 | */ | |
d45f60c6 | 1856 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 1857 | { |
d45f60c6 | 1858 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); |
cd841605 | 1859 | if (!hdr->pnfs_error) { |
d45f60c6 WAA |
1860 | pnfs_set_layoutcommit(hdr); |
1861 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
1acbbb4e | 1862 | } else |
d45f60c6 WAA |
1863 | pnfs_ld_handle_write_error(hdr); |
1864 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 1865 | } |
d20581aa | 1866 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1867 | |
dce81290 TM |
1868 | static void |
1869 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1870 | struct nfs_pgio_header *hdr) |
dce81290 | 1871 | { |
48d635f1 | 1872 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1873 | |
6c75dc0d | 1874 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1875 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 1876 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 1877 | mirror->pg_recoalesce = 1; |
6c75dc0d | 1878 | } |
d45f60c6 | 1879 | nfs_pgio_data_destroy(hdr); |
dce81290 TM |
1880 | } |
1881 | ||
1882 | static enum pnfs_try_status | |
d45f60c6 | 1883 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
1884 | const struct rpc_call_ops *call_ops, |
1885 | struct pnfs_layout_segment *lseg, | |
1886 | int how) | |
0382b744 | 1887 | { |
cd841605 | 1888 | struct inode *inode = hdr->inode; |
0382b744 AA |
1889 | enum pnfs_try_status trypnfs; |
1890 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1891 | ||
cd841605 | 1892 | hdr->mds_ops = call_ops; |
0382b744 AA |
1893 | |
1894 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
1895 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
1896 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 1897 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 1898 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
1899 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1900 | return trypnfs; | |
1901 | } | |
1902 | ||
dce81290 | 1903 | static void |
7f714720 WAA |
1904 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
1905 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 1906 | { |
dce81290 TM |
1907 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
1908 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 1909 | enum pnfs_try_status trypnfs; |
dce81290 | 1910 | |
d45f60c6 | 1911 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 1912 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 1913 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
1914 | } |
1915 | ||
6c75dc0d FI |
1916 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
1917 | { | |
9369a431 | 1918 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 1919 | nfs_pgio_header_free(hdr); |
6c75dc0d | 1920 | } |
89d77c8f | 1921 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
6c75dc0d | 1922 | |
dce81290 TM |
1923 | int |
1924 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
1925 | { | |
48d635f1 | 1926 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1927 | |
6c75dc0d | 1928 | struct nfs_pgio_header *hdr; |
dce81290 TM |
1929 | int ret; |
1930 | ||
1e7f3a48 WAA |
1931 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
1932 | if (!hdr) { | |
a7d42ddb | 1933 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
6c75dc0d | 1934 | return -ENOMEM; |
dce81290 | 1935 | } |
6c75dc0d | 1936 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 1937 | |
9369a431 | 1938 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 1939 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 1940 | if (!ret) |
7f714720 | 1941 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 1942 | |
6c75dc0d | 1943 | return ret; |
dce81290 TM |
1944 | } |
1945 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
1946 | ||
53113ad3 | 1947 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
1948 | { |
1949 | struct nfs_pageio_descriptor pgio; | |
1950 | ||
1acbbb4e | 1951 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
1952 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
1953 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 1954 | } |
e7dd79af | 1955 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 1956 | |
d45f60c6 | 1957 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1958 | { |
cd841605 FI |
1959 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
1960 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1961 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1962 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1963 | } |
4db6e0b7 | 1964 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1965 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
1966 | } |
1967 | ||
d20581aa BH |
1968 | /* |
1969 | * Called by non rpc-based layout drivers | |
1970 | */ | |
d45f60c6 | 1971 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 1972 | { |
d45f60c6 | 1973 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
cd841605 | 1974 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
1975 | __nfs4_read_done_cb(hdr); |
1976 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
62e4a769 | 1977 | } else |
d45f60c6 WAA |
1978 | pnfs_ld_handle_read_error(hdr); |
1979 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
1980 | } |
1981 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
1982 | ||
493292dd TM |
1983 | static void |
1984 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1985 | struct nfs_pgio_header *hdr) |
493292dd | 1986 | { |
48d635f1 | 1987 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1988 | |
4db6e0b7 | 1989 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1990 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 1991 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 1992 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 1993 | } |
d45f60c6 | 1994 | nfs_pgio_data_destroy(hdr); |
493292dd TM |
1995 | } |
1996 | ||
64419a9b AA |
1997 | /* |
1998 | * Call the appropriate parallel I/O subsystem read function. | |
1999 | */ | |
493292dd | 2000 | static enum pnfs_try_status |
d45f60c6 | 2001 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2002 | const struct rpc_call_ops *call_ops, |
2003 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2004 | { |
cd841605 | 2005 | struct inode *inode = hdr->inode; |
64419a9b AA |
2006 | struct nfs_server *nfss = NFS_SERVER(inode); |
2007 | enum pnfs_try_status trypnfs; | |
2008 | ||
cd841605 | 2009 | hdr->mds_ops = call_ops; |
64419a9b AA |
2010 | |
2011 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2012 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2013 | |
d45f60c6 | 2014 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2015 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2016 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2017 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2018 | return trypnfs; | |
2019 | } | |
863a3c6c | 2020 | |
ceb11e13 PT |
2021 | /* Resend all requests through pnfs. */ |
2022 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) | |
2023 | { | |
2024 | struct nfs_pageio_descriptor pgio; | |
2025 | ||
2026 | nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); | |
2027 | return nfs_pageio_resend(&pgio, hdr); | |
2028 | } | |
2029 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2030 | ||
493292dd | 2031 | static void |
7f714720 | 2032 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2033 | { |
493292dd TM |
2034 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2035 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2036 | enum pnfs_try_status trypnfs; |
ceb11e13 | 2037 | int err = 0; |
493292dd | 2038 | |
d45f60c6 | 2039 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 PT |
2040 | if (trypnfs == PNFS_TRY_AGAIN) |
2041 | err = pnfs_read_resend_pnfs(hdr); | |
2042 | if (trypnfs == PNFS_NOT_ATTEMPTED || err) | |
d45f60c6 | 2043 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
2044 | } |
2045 | ||
4db6e0b7 FI |
2046 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
2047 | { | |
9369a431 | 2048 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2049 | nfs_pgio_header_free(hdr); |
4db6e0b7 | 2050 | } |
89d77c8f | 2051 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
4db6e0b7 | 2052 | |
493292dd TM |
2053 | int |
2054 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
2055 | { | |
48d635f1 | 2056 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2057 | |
4db6e0b7 | 2058 | struct nfs_pgio_header *hdr; |
493292dd TM |
2059 | int ret; |
2060 | ||
1e7f3a48 WAA |
2061 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2062 | if (!hdr) { | |
a7d42ddb | 2063 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
180bb5ec | 2064 | return -ENOMEM; |
493292dd | 2065 | } |
4db6e0b7 | 2066 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 2067 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2068 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2069 | if (!ret) |
7f714720 | 2070 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 2071 | return ret; |
493292dd TM |
2072 | } |
2073 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
2074 | ||
71244d9b TM |
2075 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
2076 | { | |
2077 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
2078 | ||
2079 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 2080 | smp_mb__after_atomic(); |
71244d9b TM |
2081 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
2082 | } | |
2083 | ||
863a3c6c | 2084 | /* |
a9bae566 | 2085 | * There can be multiple RW segments. |
863a3c6c | 2086 | */ |
a9bae566 | 2087 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 2088 | { |
a9bae566 | 2089 | struct pnfs_layout_segment *lseg; |
863a3c6c | 2090 | |
a9bae566 PT |
2091 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
2092 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 2093 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
2094 | list_add(&lseg->pls_lc_list, listp); |
2095 | } | |
863a3c6c AA |
2096 | } |
2097 | ||
a073dbff TM |
2098 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
2099 | { | |
2100 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
2101 | |
2102 | /* Matched by references in pnfs_set_layoutcommit */ | |
2103 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
2104 | list_del_init(&lseg->pls_lc_list); | |
2105 | pnfs_put_lseg(lseg); | |
2106 | } | |
2107 | ||
71244d9b | 2108 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
2109 | } |
2110 | ||
1b0ae068 PT |
2111 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
2112 | { | |
b9e028fd | 2113 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
2114 | } |
2115 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
2116 | ||
863a3c6c | 2117 | void |
d45f60c6 | 2118 | pnfs_set_layoutcommit(struct nfs_pgio_header *hdr) |
863a3c6c | 2119 | { |
cd841605 FI |
2120 | struct inode *inode = hdr->inode; |
2121 | struct nfs_inode *nfsi = NFS_I(inode); | |
d45f60c6 | 2122 | loff_t end_pos = hdr->mds_offset + hdr->res.count; |
79a48a1f | 2123 | bool mark_as_dirty = false; |
863a3c6c | 2124 | |
cd841605 | 2125 | spin_lock(&inode->i_lock); |
863a3c6c | 2126 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
79a48a1f | 2127 | mark_as_dirty = true; |
863a3c6c | 2128 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 2129 | __func__, inode->i_ino); |
863a3c6c | 2130 | } |
cd841605 | 2131 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
a9bae566 | 2132 | /* references matched in nfs4_layoutcommit_release */ |
9369a431 | 2133 | pnfs_get_lseg(hdr->lseg); |
a9bae566 | 2134 | } |
acff5880 PT |
2135 | if (end_pos > nfsi->layout->plh_lwb) |
2136 | nfsi->layout->plh_lwb = end_pos; | |
cd841605 | 2137 | spin_unlock(&inode->i_lock); |
acff5880 | 2138 | dprintk("%s: lseg %p end_pos %llu\n", |
cd841605 | 2139 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2140 | |
2141 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2142 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2143 | if (mark_as_dirty) | |
cd841605 | 2144 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2145 | } |
2146 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2147 | ||
378520b8 PT |
2148 | void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data) |
2149 | { | |
2150 | struct inode *inode = data->inode; | |
2151 | struct nfs_inode *nfsi = NFS_I(inode); | |
2152 | bool mark_as_dirty = false; | |
2153 | ||
2154 | spin_lock(&inode->i_lock); | |
2155 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { | |
2156 | mark_as_dirty = true; | |
2157 | dprintk("%s: Set layoutcommit for inode %lu ", | |
2158 | __func__, inode->i_ino); | |
2159 | } | |
2160 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &data->lseg->pls_flags)) { | |
2161 | /* references matched in nfs4_layoutcommit_release */ | |
2162 | pnfs_get_lseg(data->lseg); | |
2163 | } | |
2164 | if (data->lwb > nfsi->layout->plh_lwb) | |
2165 | nfsi->layout->plh_lwb = data->lwb; | |
2166 | spin_unlock(&inode->i_lock); | |
2167 | dprintk("%s: lseg %p end_pos %llu\n", | |
2168 | __func__, data->lseg, nfsi->layout->plh_lwb); | |
2169 | ||
2170 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2171 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2172 | if (mark_as_dirty) | |
2173 | mark_inode_dirty_sync(inode); | |
2174 | } | |
2175 | EXPORT_SYMBOL_GPL(pnfs_commit_set_layoutcommit); | |
2176 | ||
db29c089 AA |
2177 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2178 | { | |
2179 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2180 | ||
2181 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2182 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2183 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2184 | } |
2185 | ||
de4b15c7 AA |
2186 | /* |
2187 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2188 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2189 | * data to disk to allow the server to recover the data if it crashes. | |
2190 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2191 | * is off, and a COMMIT is sent to a data server, or | |
2192 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2193 | */ | |
863a3c6c | 2194 | int |
ef311537 | 2195 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2196 | { |
5f919c9f | 2197 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2198 | struct nfs4_layoutcommit_data *data; |
2199 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2200 | loff_t end_pos; |
71244d9b | 2201 | int status; |
863a3c6c | 2202 | |
71244d9b | 2203 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2204 | return 0; |
2205 | ||
71244d9b | 2206 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2207 | |
71244d9b | 2208 | status = -EAGAIN; |
92407e75 | 2209 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2210 | if (!sync) |
2211 | goto out; | |
74316201 | 2212 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2213 | NFS_INO_LAYOUTCOMMITTING, |
2214 | nfs_wait_bit_killable, | |
2215 | TASK_KILLABLE); | |
92407e75 | 2216 | if (status) |
71244d9b | 2217 | goto out; |
92407e75 PT |
2218 | } |
2219 | ||
71244d9b TM |
2220 | status = -ENOMEM; |
2221 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2222 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2223 | if (!data) | |
2224 | goto clear_layoutcommitting; | |
2225 | ||
2226 | status = 0; | |
de4b15c7 | 2227 | spin_lock(&inode->i_lock); |
71244d9b TM |
2228 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2229 | goto out_unlock; | |
a9bae566 | 2230 | |
71244d9b | 2231 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2232 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2233 | |
acff5880 | 2234 | end_pos = nfsi->layout->plh_lwb; |
acff5880 | 2235 | nfsi->layout->plh_lwb = 0; |
863a3c6c | 2236 | |
f597c537 | 2237 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2238 | spin_unlock(&inode->i_lock); |
2239 | ||
2240 | data->args.inode = inode; | |
9fa40758 | 2241 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2242 | nfs_fattr_init(&data->fattr); |
2243 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2244 | data->res.fattr = &data->fattr; | |
2245 | data->args.lastbytewritten = end_pos - 1; | |
2246 | data->res.server = NFS_SERVER(inode); | |
2247 | ||
5f919c9f CH |
2248 | if (ld->prepare_layoutcommit) { |
2249 | status = ld->prepare_layoutcommit(&data->args); | |
2250 | if (status) { | |
2251 | spin_lock(&inode->i_lock); | |
2252 | if (end_pos < nfsi->layout->plh_lwb) | |
2253 | nfsi->layout->plh_lwb = end_pos; | |
2254 | spin_unlock(&inode->i_lock); | |
2255 | put_rpccred(data->cred); | |
2256 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); | |
2257 | goto clear_layoutcommitting; | |
2258 | } | |
2259 | } | |
2260 | ||
2261 | ||
863a3c6c AA |
2262 | status = nfs4_proc_layoutcommit(data, sync); |
2263 | out: | |
92407e75 PT |
2264 | if (status) |
2265 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2266 | dprintk("<-- %s status %d\n", __func__, status); |
2267 | return status; | |
71244d9b TM |
2268 | out_unlock: |
2269 | spin_unlock(&inode->i_lock); | |
92407e75 | 2270 | kfree(data); |
71244d9b TM |
2271 | clear_layoutcommitting: |
2272 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2273 | goto out; |
863a3c6c | 2274 | } |
72cff449 | 2275 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a AA |
2276 | |
2277 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) | |
2278 | { | |
2279 | struct nfs4_threshold *thp; | |
2280 | ||
2281 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2282 | if (!thp) { | |
2283 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2284 | return NULL; | |
2285 | } | |
2286 | return thp; | |
2287 | } |