]>
Commit | Line | Data |
---|---|---|
85e174ba RL |
1 | /* |
2 | * pNFS functions to call and manage layout drivers. | |
3 | * | |
4 | * Copyright (c) 2002 [year of first publication] | |
5 | * The Regents of the University of Michigan | |
6 | * All Rights Reserved | |
7 | * | |
8 | * Dean Hildebrand <dhildebz@umich.edu> | |
9 | * | |
10 | * Permission is granted to use, copy, create derivative works, and | |
11 | * redistribute this software and such derivative works for any purpose, | |
12 | * so long as the name of the University of Michigan is not used in | |
13 | * any advertising or publicity pertaining to the use or distribution | |
14 | * of this software without specific, written prior authorization. If | |
15 | * the above copyright notice or any other identification of the | |
16 | * University of Michigan is included in any copy of any portion of | |
17 | * this software, then the disclaimer below must also be included. | |
18 | * | |
19 | * This software is provided as is, without representation or warranty | |
20 | * of any kind either express or implied, including without limitation | |
21 | * the implied warranties of merchantability, fitness for a particular | |
22 | * purpose, or noninfringement. The Regents of the University of | |
23 | * Michigan shall not be liable for any damages, including special, | |
24 | * indirect, incidental, or consequential damages, with respect to any | |
25 | * claim arising out of or in connection with the use of the software, | |
26 | * even if it has been or is hereafter advised of the possibility of | |
27 | * such damages. | |
28 | */ | |
29 | ||
30 | #include <linux/nfs_fs.h> | |
493292dd | 31 | #include <linux/nfs_page.h> |
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" |
85e174ba RL |
37 | |
38 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 39 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 40 | |
02c35fca FI |
41 | /* Locking: |
42 | * | |
43 | * pnfs_spinlock: | |
44 | * protects pnfs_modules_tbl. | |
45 | */ | |
46 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
47 | ||
48 | /* | |
49 | * pnfs_modules_tbl holds all pnfs modules | |
50 | */ | |
51 | static LIST_HEAD(pnfs_modules_tbl); | |
52 | ||
aa1e0e3a PT |
53 | static int |
54 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, | |
55 | enum pnfs_iomode iomode); | |
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 | ||
244 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { | |
566f8737 PT |
245 | if (!list_empty(&lo->plh_segs)) |
246 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 247 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 248 | spin_unlock(&inode->i_lock); |
6622c3ea | 249 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 250 | } |
974cec8c AA |
251 | } |
252 | ||
b9e028fd TM |
253 | static int |
254 | pnfs_iomode_to_fail_bit(u32 iomode) | |
255 | { | |
256 | return iomode == IOMODE_RW ? | |
257 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
258 | } | |
259 | ||
260 | static void | |
3e621214 | 261 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 262 | { |
25c75333 | 263 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 264 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
265 | atomic_inc(&lo->plh_refcount); |
266 | } | |
267 | ||
268 | static void | |
269 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
270 | { | |
271 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
272 | atomic_dec(&lo->plh_refcount); | |
273 | } | |
274 | ||
275 | static void | |
276 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
277 | { | |
278 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
279 | struct pnfs_layout_range range = { |
280 | .iomode = iomode, | |
281 | .offset = 0, | |
282 | .length = NFS4_MAX_UINT64, | |
283 | }; | |
284 | LIST_HEAD(head); | |
3e621214 TM |
285 | |
286 | spin_lock(&inode->i_lock); | |
287 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 288 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 289 | spin_unlock(&inode->i_lock); |
115ce575 | 290 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
291 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
292 | iomode == IOMODE_RW ? "RW" : "READ"); | |
293 | } | |
294 | ||
295 | static bool | |
296 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
297 | { | |
25c75333 | 298 | unsigned long start, end; |
3e621214 TM |
299 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
300 | ||
301 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
302 | return false; |
303 | end = jiffies; | |
304 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
305 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
306 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 307 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
308 | return false; |
309 | } | |
310 | return true; | |
b9e028fd TM |
311 | } |
312 | ||
974cec8c AA |
313 | static void |
314 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
315 | { | |
566052c5 | 316 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 317 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
318 | atomic_set(&lseg->pls_refcount, 1); |
319 | smp_mb(); | |
320 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 321 | lseg->pls_layout = lo; |
974cec8c AA |
322 | } |
323 | ||
905ca191 | 324 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 325 | { |
b7edfaa1 | 326 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 327 | |
b1f69b75 | 328 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
329 | } |
330 | ||
d684d2ae | 331 | static void |
57036a37 TM |
332 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
333 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 334 | { |
57036a37 | 335 | struct inode *inode = lo->plh_inode; |
d684d2ae | 336 | |
d20581aa | 337 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 338 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
339 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
340 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
341 | if (list_empty(&lo->plh_segs)) |
342 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
343 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
344 | } | |
345 | ||
aa1e0e3a PT |
346 | /* Return true if layoutreturn is needed */ |
347 | static bool | |
348 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo, | |
349 | struct pnfs_layout_segment *lseg, | |
350 | nfs4_stateid *stateid, enum pnfs_iomode *iomode) | |
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) | |
358 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
359 | return false; | |
360 | ||
361 | *stateid = lo->plh_stateid; | |
362 | *iomode = lo->plh_return_iomode; | |
363 | /* decreased in pnfs_send_layoutreturn() */ | |
364 | lo->plh_block_lgets++; | |
365 | lo->plh_return_iomode = 0; | |
366 | return true; | |
367 | } | |
368 | ||
bae724ef | 369 | void |
9369a431 | 370 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 371 | { |
57036a37 | 372 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
373 | struct inode *inode; |
374 | ||
375 | if (!lseg) | |
376 | return; | |
377 | ||
4541d16c FI |
378 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
379 | atomic_read(&lseg->pls_refcount), | |
380 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
57036a37 TM |
381 | lo = lseg->pls_layout; |
382 | inode = lo->plh_inode; | |
d684d2ae | 383 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
aa1e0e3a PT |
384 | bool need_return; |
385 | nfs4_stateid stateid; | |
386 | enum pnfs_iomode iomode; | |
387 | ||
8f0d27dc | 388 | pnfs_get_layout_hdr(lo); |
57036a37 | 389 | pnfs_layout_remove_lseg(lo, lseg); |
aa1e0e3a PT |
390 | need_return = pnfs_layout_need_return(lo, lseg, |
391 | &stateid, &iomode); | |
d684d2ae | 392 | spin_unlock(&inode->i_lock); |
905ca191 | 393 | pnfs_free_lseg(lseg); |
aa1e0e3a PT |
394 | if (need_return) |
395 | pnfs_send_layoutreturn(lo, stateid, iomode); | |
396 | else | |
397 | pnfs_put_layout_hdr(lo); | |
4541d16c | 398 | } |
4541d16c | 399 | } |
9369a431 | 400 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 401 | |
6543f803 | 402 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
403 | { |
404 | struct pnfs_layout_segment *lseg; | |
6543f803 | 405 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
406 | |
407 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 408 | lo = lseg->pls_layout; |
e6cf82d1 | 409 | |
6543f803 TM |
410 | pnfs_free_lseg(lseg); |
411 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
412 | } |
413 | ||
6543f803 | 414 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 415 | { |
6543f803 | 416 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
417 | schedule_work(&lseg->pls_work); |
418 | } | |
6543f803 TM |
419 | |
420 | void | |
421 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
422 | { | |
423 | if (!lseg) | |
424 | return; | |
425 | ||
426 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
427 | ||
428 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
429 | atomic_read(&lseg->pls_refcount), | |
430 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
431 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
432 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
433 | pnfs_get_layout_hdr(lo); | |
434 | pnfs_layout_remove_lseg(lo, lseg); | |
435 | pnfs_free_lseg_async(lseg); | |
436 | } | |
437 | } | |
438 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 439 | |
3cb2df17 | 440 | static u64 |
fb3296eb BH |
441 | end_offset(u64 start, u64 len) |
442 | { | |
443 | u64 end; | |
444 | ||
445 | end = start + len; | |
446 | return end >= start ? end : NFS4_MAX_UINT64; | |
447 | } | |
448 | ||
fb3296eb BH |
449 | /* |
450 | * is l2 fully contained in l1? | |
451 | * start1 end1 | |
452 | * [----------------------------------) | |
453 | * start2 end2 | |
454 | * [----------------) | |
455 | */ | |
3cb2df17 | 456 | static bool |
7dc0ac70 | 457 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 458 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
459 | { |
460 | u64 start1 = l1->offset; | |
461 | u64 end1 = end_offset(start1, l1->length); | |
462 | u64 start2 = l2->offset; | |
463 | u64 end2 = end_offset(start2, l2->length); | |
464 | ||
465 | return (start1 <= start2) && (end1 >= end2); | |
466 | } | |
467 | ||
468 | /* | |
469 | * is l1 and l2 intersecting? | |
470 | * start1 end1 | |
471 | * [----------------------------------) | |
472 | * start2 end2 | |
473 | * [----------------) | |
474 | */ | |
3cb2df17 | 475 | static bool |
7dc0ac70 | 476 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 477 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
478 | { |
479 | u64 start1 = l1->offset; | |
480 | u64 end1 = end_offset(start1, l1->length); | |
481 | u64 start2 = l2->offset; | |
482 | u64 end2 = end_offset(start2, l2->length); | |
483 | ||
484 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
485 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
486 | } | |
487 | ||
4541d16c | 488 | static bool |
3cb2df17 TM |
489 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
490 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 491 | { |
778b5502 BH |
492 | return (recall_range->iomode == IOMODE_ANY || |
493 | lseg_range->iomode == recall_range->iomode) && | |
7dc0ac70 | 494 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
974cec8c AA |
495 | } |
496 | ||
24956804 TM |
497 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
498 | struct list_head *tmp_list) | |
499 | { | |
500 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
501 | return false; | |
502 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
503 | list_add(&lseg->pls_list, tmp_list); | |
504 | return true; | |
505 | } | |
506 | ||
4541d16c FI |
507 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
508 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
509 | struct list_head *tmp_list) | |
510 | { | |
511 | int rv = 0; | |
512 | ||
513 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
514 | /* Remove the reference keeping the lseg in the | |
515 | * list. It will now be removed when all | |
516 | * outstanding io is finished. | |
517 | */ | |
d684d2ae FI |
518 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
519 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 520 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 521 | rv = 1; |
4541d16c FI |
522 | } |
523 | return rv; | |
524 | } | |
525 | ||
526 | /* Returns count of number of matching invalid lsegs remaining in list | |
527 | * after call. | |
528 | */ | |
43f1b3da | 529 | int |
49a85061 | 530 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 531 | struct list_head *tmp_list, |
778b5502 | 532 | struct pnfs_layout_range *recall_range) |
974cec8c AA |
533 | { |
534 | struct pnfs_layout_segment *lseg, *next; | |
4541d16c | 535 | int invalid = 0, removed = 0; |
974cec8c AA |
536 | |
537 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
538 | ||
8006bfba | 539 | if (list_empty(&lo->plh_segs)) |
38511722 | 540 | return 0; |
4541d16c | 541 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
542 | if (!recall_range || |
543 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
544 | dprintk("%s: freeing lseg %p iomode %d " |
545 | "offset %llu length %llu\n", __func__, | |
546 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
547 | lseg->pls_range.length); | |
548 | invalid++; | |
549 | removed += mark_lseg_invalid(lseg, tmp_list); | |
550 | } | |
551 | dprintk("%s:Return %i\n", __func__, invalid - removed); | |
552 | return invalid - removed; | |
974cec8c AA |
553 | } |
554 | ||
f49f9baa | 555 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 556 | void |
4541d16c | 557 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 558 | { |
4541d16c | 559 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
560 | |
561 | if (list_empty(free_me)) | |
562 | return; | |
563 | ||
4541d16c | 564 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 565 | list_del(&lseg->pls_list); |
905ca191 | 566 | pnfs_free_lseg(lseg); |
974cec8c AA |
567 | } |
568 | } | |
569 | ||
e5e94017 BH |
570 | void |
571 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
572 | { | |
573 | struct pnfs_layout_hdr *lo; | |
974cec8c | 574 | LIST_HEAD(tmp_list); |
e5e94017 BH |
575 | |
576 | spin_lock(&nfsi->vfs_inode.i_lock); | |
577 | lo = nfsi->layout; | |
578 | if (lo) { | |
38511722 | 579 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
49a85061 | 580 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
3e621214 TM |
581 | pnfs_get_layout_hdr(lo); |
582 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); | |
583 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
584 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
585 | pnfs_free_lseg_list(&tmp_list); | |
586 | pnfs_put_layout_hdr(lo); | |
587 | } else | |
588 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 589 | } |
041245c8 | 590 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 591 | |
fd9a8d71 TM |
592 | static bool |
593 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
594 | struct list_head *layout_list) | |
974cec8c AA |
595 | { |
596 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 597 | bool ret = false; |
974cec8c | 598 | |
fd9a8d71 TM |
599 | spin_lock(&inode->i_lock); |
600 | lo = NFS_I(inode)->layout; | |
601 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
602 | pnfs_get_layout_hdr(lo); | |
603 | list_add(&lo->plh_bulk_destroy, layout_list); | |
604 | ret = true; | |
605 | } | |
606 | spin_unlock(&inode->i_lock); | |
607 | return ret; | |
608 | } | |
609 | ||
610 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
611 | static int | |
612 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
613 | struct nfs_server *server, | |
614 | struct list_head *layout_list) | |
615 | { | |
616 | struct pnfs_layout_hdr *lo, *next; | |
617 | struct inode *inode; | |
618 | ||
619 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
620 | inode = igrab(lo->plh_inode); | |
621 | if (inode == NULL) | |
622 | continue; | |
623 | list_del_init(&lo->plh_layouts); | |
624 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
625 | continue; | |
626 | rcu_read_unlock(); | |
627 | spin_unlock(&clp->cl_lock); | |
628 | iput(inode); | |
629 | spin_lock(&clp->cl_lock); | |
630 | rcu_read_lock(); | |
631 | return -EAGAIN; | |
632 | } | |
633 | return 0; | |
634 | } | |
635 | ||
636 | static int | |
637 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
638 | bool is_bulk_recall) | |
639 | { | |
640 | struct pnfs_layout_hdr *lo; | |
641 | struct inode *inode; | |
642 | struct pnfs_layout_range range = { | |
643 | .iomode = IOMODE_ANY, | |
644 | .offset = 0, | |
645 | .length = NFS4_MAX_UINT64, | |
646 | }; | |
647 | LIST_HEAD(lseg_list); | |
648 | int ret = 0; | |
649 | ||
650 | while (!list_empty(layout_list)) { | |
651 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
652 | plh_bulk_destroy); | |
653 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
654 | lo->plh_inode->i_ino); | |
655 | inode = lo->plh_inode; | |
7c5d1875 CH |
656 | |
657 | pnfs_layoutcommit_inode(inode, false); | |
658 | ||
fd9a8d71 TM |
659 | spin_lock(&inode->i_lock); |
660 | list_del_init(&lo->plh_bulk_destroy); | |
661 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ | |
662 | if (is_bulk_recall) | |
663 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
664 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) | |
665 | ret = -EAGAIN; | |
666 | spin_unlock(&inode->i_lock); | |
667 | pnfs_free_lseg_list(&lseg_list); | |
668 | pnfs_put_layout_hdr(lo); | |
669 | iput(inode); | |
670 | } | |
671 | return ret; | |
672 | } | |
673 | ||
674 | int | |
675 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
676 | struct nfs_fsid *fsid, | |
677 | bool is_recall) | |
678 | { | |
679 | struct nfs_server *server; | |
680 | LIST_HEAD(layout_list); | |
c47abcf8 | 681 | |
974cec8c | 682 | spin_lock(&clp->cl_lock); |
6382a441 | 683 | rcu_read_lock(); |
fd9a8d71 | 684 | restart: |
6382a441 | 685 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
686 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
687 | continue; | |
688 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
689 | server, | |
690 | &layout_list) != 0) | |
691 | goto restart; | |
6382a441 WAA |
692 | } |
693 | rcu_read_unlock(); | |
974cec8c AA |
694 | spin_unlock(&clp->cl_lock); |
695 | ||
fd9a8d71 TM |
696 | if (list_empty(&layout_list)) |
697 | return 0; | |
698 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
699 | } | |
700 | ||
701 | int | |
702 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
703 | bool is_recall) | |
704 | { | |
705 | struct nfs_server *server; | |
706 | LIST_HEAD(layout_list); | |
707 | ||
708 | spin_lock(&clp->cl_lock); | |
709 | rcu_read_lock(); | |
710 | restart: | |
711 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
712 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
713 | server, | |
714 | &layout_list) != 0) | |
715 | goto restart; | |
974cec8c | 716 | } |
fd9a8d71 TM |
717 | rcu_read_unlock(); |
718 | spin_unlock(&clp->cl_lock); | |
719 | ||
720 | if (list_empty(&layout_list)) | |
721 | return 0; | |
722 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
723 | } | |
724 | ||
725 | /* | |
726 | * Called by the state manger to remove all layouts established under an | |
727 | * expired lease. | |
728 | */ | |
729 | void | |
730 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
731 | { | |
732 | nfs4_deviceid_mark_client_invalid(clp); | |
733 | nfs4_deviceid_purge_client(clp); | |
734 | ||
735 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
736 | } |
737 | ||
5a65503f TM |
738 | /* |
739 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
740 | * taking into account wraparound issues. | |
741 | */ | |
742 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
743 | { | |
2c64c57d | 744 | return (s32)(s1 - s2) > 0; |
5a65503f TM |
745 | } |
746 | ||
fd6002e9 | 747 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
748 | void |
749 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
750 | bool update_barrier) | |
b1f69b75 | 751 | { |
22aaf714 TM |
752 | u32 oldseq, newseq, new_barrier; |
753 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 754 | |
2d2f24ad TM |
755 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
756 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 757 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 758 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 759 | if (update_barrier) { |
22aaf714 | 760 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
761 | } else { |
762 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 763 | * "close" to the current seqids. |
43f1b3da | 764 | */ |
22aaf714 | 765 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 766 | } |
22aaf714 TM |
767 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
768 | lo->plh_barrier = new_barrier; | |
43f1b3da | 769 | } |
b1f69b75 AA |
770 | } |
771 | ||
cf7d63f1 | 772 | static bool |
19c54aba TM |
773 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
774 | const nfs4_stateid *stateid) | |
43f1b3da | 775 | { |
19c54aba | 776 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 777 | |
19c54aba TM |
778 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
779 | } | |
780 | ||
ce6ab4f2 PT |
781 | static bool |
782 | pnfs_layout_returning(const struct pnfs_layout_hdr *lo, | |
783 | struct pnfs_layout_range *range) | |
784 | { | |
785 | return test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) && | |
786 | (lo->plh_return_iomode == IOMODE_ANY || | |
787 | lo->plh_return_iomode == range->iomode); | |
788 | } | |
789 | ||
19c54aba TM |
790 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
791 | static bool | |
ce6ab4f2 PT |
792 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, |
793 | struct pnfs_layout_range *range, int lget) | |
19c54aba | 794 | { |
f7e8917a FI |
795 | return lo->plh_block_lgets || |
796 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
43f1b3da | 797 | (list_empty(&lo->plh_segs) && |
ce6ab4f2 PT |
798 | (atomic_read(&lo->plh_outstanding) > lget)) || |
799 | pnfs_layout_returning(lo, range); | |
cf7d63f1 FI |
800 | } |
801 | ||
fd6002e9 FI |
802 | int |
803 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
ce6ab4f2 | 804 | struct pnfs_layout_range *range, |
fd6002e9 | 805 | struct nfs4_state *open_state) |
b1f69b75 | 806 | { |
fd6002e9 | 807 | int status = 0; |
974cec8c | 808 | |
b1f69b75 | 809 | dprintk("--> %s\n", __func__); |
fd6002e9 | 810 | spin_lock(&lo->plh_inode->i_lock); |
ce6ab4f2 | 811 | if (pnfs_layoutgets_blocked(lo, range, 1)) { |
cf7d63f1 | 812 | status = -EAGAIN; |
5d422301 TM |
813 | } else if (!nfs4_valid_open_stateid(open_state)) { |
814 | status = -EBADF; | |
47abadef CH |
815 | } else if (list_empty(&lo->plh_segs) || |
816 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { | |
fd6002e9 FI |
817 | int seq; |
818 | ||
819 | do { | |
820 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 821 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
822 | } while (read_seqretry(&open_state->seqlock, seq)); |
823 | } else | |
f597c537 | 824 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 825 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 826 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 827 | return status; |
b1f69b75 AA |
828 | } |
829 | ||
830 | /* | |
831 | * Get layout from server. | |
832 | * for now, assume that whole file layouts are requested. | |
833 | * arg->offset: 0 | |
834 | * arg->length: all ones | |
835 | */ | |
e5e94017 BH |
836 | static struct pnfs_layout_segment * |
837 | send_layoutget(struct pnfs_layout_hdr *lo, | |
838 | struct nfs_open_context *ctx, | |
fb3296eb | 839 | struct pnfs_layout_range *range, |
a75b9df9 | 840 | gfp_t gfp_flags) |
e5e94017 | 841 | { |
b7edfaa1 | 842 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
843 | struct nfs_server *server = NFS_SERVER(ino); |
844 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 845 | struct pnfs_layout_segment *lseg; |
b1f69b75 AA |
846 | |
847 | dprintk("--> %s\n", __func__); | |
e5e94017 | 848 | |
a75b9df9 | 849 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
cf7d63f1 | 850 | if (lgp == NULL) |
b1f69b75 | 851 | return NULL; |
35124a09 | 852 | |
fb3296eb BH |
853 | lgp->args.minlength = PAGE_CACHE_SIZE; |
854 | if (lgp->args.minlength > range->length) | |
855 | lgp->args.minlength = range->length; | |
b1f69b75 | 856 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
fb3296eb | 857 | lgp->args.range = *range; |
b1f69b75 AA |
858 | lgp->args.type = server->pnfs_curr_ld->id; |
859 | lgp->args.inode = ino; | |
860 | lgp->args.ctx = get_nfs_open_context(ctx); | |
a75b9df9 | 861 | lgp->gfp_flags = gfp_flags; |
6ab59344 | 862 | lgp->cred = lo->plh_lc_cred; |
b1f69b75 AA |
863 | |
864 | /* Synchronously retrieve layout information from server and | |
865 | * store in lseg. | |
866 | */ | |
a0b0a6e3 TM |
867 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
868 | if (IS_ERR(lseg)) { | |
869 | switch (PTR_ERR(lseg)) { | |
870 | case -ENOMEM: | |
871 | case -ERESTARTSYS: | |
872 | break; | |
873 | default: | |
874 | /* remember that LAYOUTGET failed and suspend trying */ | |
b9e028fd | 875 | pnfs_layout_io_set_failed(lo, range->iomode); |
a0b0a6e3 TM |
876 | } |
877 | return NULL; | |
974cec8c | 878 | } |
35124a09 | 879 | |
974cec8c AA |
880 | return lseg; |
881 | } | |
882 | ||
24956804 TM |
883 | static void pnfs_clear_layoutcommit(struct inode *inode, |
884 | struct list_head *head) | |
885 | { | |
886 | struct nfs_inode *nfsi = NFS_I(inode); | |
887 | struct pnfs_layout_segment *lseg, *tmp; | |
888 | ||
889 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
890 | return; | |
891 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
892 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
893 | continue; | |
894 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
895 | } | |
896 | } | |
897 | ||
f40eb5d0 PT |
898 | static int |
899 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, | |
900 | enum pnfs_iomode iomode) | |
901 | { | |
902 | struct inode *ino = lo->plh_inode; | |
903 | struct nfs4_layoutreturn *lrp; | |
904 | int status = 0; | |
905 | ||
906 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); | |
907 | if (unlikely(lrp == NULL)) { | |
908 | status = -ENOMEM; | |
909 | spin_lock(&ino->i_lock); | |
910 | lo->plh_block_lgets--; | |
911 | spin_unlock(&ino->i_lock); | |
912 | pnfs_put_layout_hdr(lo); | |
913 | goto out; | |
914 | } | |
915 | ||
916 | lrp->args.stateid = stateid; | |
917 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; | |
918 | lrp->args.inode = ino; | |
919 | lrp->args.iomode = iomode; | |
920 | lrp->args.layout = lo; | |
921 | lrp->clp = NFS_SERVER(ino)->nfs_client; | |
922 | lrp->cred = lo->plh_lc_cred; | |
923 | ||
924 | status = nfs4_proc_layoutreturn(lrp); | |
925 | out: | |
e736a5b9 PT |
926 | if (status) { |
927 | spin_lock(&ino->i_lock); | |
928 | clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
929 | spin_unlock(&ino->i_lock); | |
930 | } | |
f40eb5d0 PT |
931 | dprintk("<-- %s status: %d\n", __func__, status); |
932 | return status; | |
933 | } | |
934 | ||
293b3b06 AA |
935 | /* |
936 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
937 | * when the layout segment list is empty. | |
938 | * | |
939 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
940 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
941 | * deviceid is marked invalid. | |
942 | */ | |
cbe82603 BH |
943 | int |
944 | _pnfs_return_layout(struct inode *ino) | |
945 | { | |
946 | struct pnfs_layout_hdr *lo = NULL; | |
947 | struct nfs_inode *nfsi = NFS_I(ino); | |
948 | LIST_HEAD(tmp_list); | |
cbe82603 | 949 | nfs4_stateid stateid; |
293b3b06 | 950 | int status = 0, empty; |
cbe82603 | 951 | |
366d5052 | 952 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
953 | |
954 | spin_lock(&ino->i_lock); | |
955 | lo = nfsi->layout; | |
e5929f3c | 956 | if (!lo) { |
cbe82603 | 957 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
958 | dprintk("NFS: %s no layout to return\n", __func__); |
959 | goto out; | |
cbe82603 BH |
960 | } |
961 | stateid = nfsi->layout->plh_stateid; | |
962 | /* Reference matched in nfs4_layoutreturn_release */ | |
70c3bd2b | 963 | pnfs_get_layout_hdr(lo); |
293b3b06 | 964 | empty = list_empty(&lo->plh_segs); |
24956804 | 965 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 966 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
c88953d8 CH |
967 | |
968 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
969 | struct pnfs_layout_range range = { | |
970 | .iomode = IOMODE_ANY, | |
971 | .offset = 0, | |
972 | .length = NFS4_MAX_UINT64, | |
973 | }; | |
974 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
975 | } | |
976 | ||
293b3b06 AA |
977 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
978 | if (empty) { | |
979 | spin_unlock(&ino->i_lock); | |
70c3bd2b | 980 | pnfs_put_layout_hdr(lo); |
293b3b06 AA |
981 | dprintk("NFS: %s no layout segments to return\n", __func__); |
982 | goto out; | |
983 | } | |
47abadef CH |
984 | |
985 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
ea0ded74 | 986 | lo->plh_block_lgets++; |
cbe82603 BH |
987 | spin_unlock(&ino->i_lock); |
988 | pnfs_free_lseg_list(&tmp_list); | |
989 | ||
f40eb5d0 | 990 | status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY); |
cbe82603 BH |
991 | out: |
992 | dprintk("<-- %s status: %d\n", __func__, status); | |
993 | return status; | |
994 | } | |
0a57cdac | 995 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 996 | |
24028672 TM |
997 | int |
998 | pnfs_commit_and_return_layout(struct inode *inode) | |
999 | { | |
1000 | struct pnfs_layout_hdr *lo; | |
1001 | int ret; | |
1002 | ||
1003 | spin_lock(&inode->i_lock); | |
1004 | lo = NFS_I(inode)->layout; | |
1005 | if (lo == NULL) { | |
1006 | spin_unlock(&inode->i_lock); | |
1007 | return 0; | |
1008 | } | |
1009 | pnfs_get_layout_hdr(lo); | |
1010 | /* Block new layoutgets and read/write to ds */ | |
1011 | lo->plh_block_lgets++; | |
1012 | spin_unlock(&inode->i_lock); | |
1013 | filemap_fdatawait(inode->i_mapping); | |
1014 | ret = pnfs_layoutcommit_inode(inode, true); | |
1015 | if (ret == 0) | |
1016 | ret = _pnfs_return_layout(inode); | |
1017 | spin_lock(&inode->i_lock); | |
1018 | lo->plh_block_lgets--; | |
1019 | spin_unlock(&inode->i_lock); | |
1020 | pnfs_put_layout_hdr(lo); | |
1021 | return ret; | |
1022 | } | |
1023 | ||
f7e8917a FI |
1024 | bool pnfs_roc(struct inode *ino) |
1025 | { | |
1026 | struct pnfs_layout_hdr *lo; | |
1027 | struct pnfs_layout_segment *lseg, *tmp; | |
1028 | LIST_HEAD(tmp_list); | |
1029 | bool found = false; | |
1030 | ||
1031 | spin_lock(&ino->i_lock); | |
1032 | lo = NFS_I(ino)->layout; | |
1033 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || | |
1034 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) | |
1035 | goto out_nolayout; | |
1036 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) | |
1037 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
1038 | mark_lseg_invalid(lseg, &tmp_list); | |
1039 | found = true; | |
1040 | } | |
1041 | if (!found) | |
1042 | goto out_nolayout; | |
1043 | lo->plh_block_lgets++; | |
70c3bd2b | 1044 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
f7e8917a FI |
1045 | spin_unlock(&ino->i_lock); |
1046 | pnfs_free_lseg_list(&tmp_list); | |
1047 | return true; | |
1048 | ||
1049 | out_nolayout: | |
1050 | spin_unlock(&ino->i_lock); | |
1051 | return false; | |
1052 | } | |
1053 | ||
1054 | void pnfs_roc_release(struct inode *ino) | |
1055 | { | |
1056 | struct pnfs_layout_hdr *lo; | |
1057 | ||
1058 | spin_lock(&ino->i_lock); | |
1059 | lo = NFS_I(ino)->layout; | |
1060 | lo->plh_block_lgets--; | |
6622c3ea TM |
1061 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1062 | pnfs_detach_layout_hdr(lo); | |
1063 | spin_unlock(&ino->i_lock); | |
1064 | pnfs_free_layout_hdr(lo); | |
1065 | } else | |
1066 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1067 | } |
1068 | ||
1069 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1070 | { | |
1071 | struct pnfs_layout_hdr *lo; | |
1072 | ||
1073 | spin_lock(&ino->i_lock); | |
1074 | lo = NFS_I(ino)->layout; | |
0f35ad6f | 1075 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1076 | lo->plh_barrier = barrier; |
1077 | spin_unlock(&ino->i_lock); | |
1078 | } | |
1079 | ||
7fdab069 | 1080 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
f7e8917a FI |
1081 | { |
1082 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1083 | struct pnfs_layout_hdr *lo; |
f7e8917a | 1084 | struct pnfs_layout_segment *lseg; |
7fdab069 | 1085 | u32 current_seqid; |
f7e8917a FI |
1086 | bool found = false; |
1087 | ||
1088 | spin_lock(&ino->i_lock); | |
1089 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) | |
1090 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
7fdab069 | 1091 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
f7e8917a | 1092 | found = true; |
7fdab069 | 1093 | goto out; |
f7e8917a | 1094 | } |
7fdab069 TM |
1095 | lo = nfsi->layout; |
1096 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1097 | |
7fdab069 TM |
1098 | /* Since close does not return a layout stateid for use as |
1099 | * a barrier, we choose the worst-case barrier. | |
1100 | */ | |
1101 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
1102 | out: | |
f7e8917a FI |
1103 | spin_unlock(&ino->i_lock); |
1104 | return found; | |
1105 | } | |
1106 | ||
b1f69b75 AA |
1107 | /* |
1108 | * Compare two layout segments for sorting into layout cache. | |
1109 | * We want to preferentially return RW over RO layouts, so ensure those | |
1110 | * are seen first. | |
1111 | */ | |
1112 | static s64 | |
7dc0ac70 | 1113 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1114 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1115 | { |
fb3296eb BH |
1116 | s64 d; |
1117 | ||
1118 | /* high offset > low offset */ | |
1119 | d = l1->offset - l2->offset; | |
1120 | if (d) | |
1121 | return d; | |
1122 | ||
1123 | /* short length > long length */ | |
1124 | d = l2->length - l1->length; | |
1125 | if (d) | |
1126 | return d; | |
1127 | ||
b1f69b75 | 1128 | /* read > read/write */ |
fb3296eb | 1129 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1130 | } |
1131 | ||
974cec8c | 1132 | static void |
57036a37 | 1133 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
974cec8c AA |
1134 | struct pnfs_layout_segment *lseg) |
1135 | { | |
b1f69b75 | 1136 | struct pnfs_layout_segment *lp; |
b1f69b75 | 1137 | |
974cec8c AA |
1138 | dprintk("%s:Begin\n", __func__); |
1139 | ||
b7edfaa1 | 1140 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
7dc0ac70 | 1141 | if (pnfs_lseg_range_cmp(&lseg->pls_range, &lp->pls_range) > 0) |
b1f69b75 | 1142 | continue; |
566052c5 | 1143 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1144 | dprintk("%s: inserted lseg %p " |
1145 | "iomode %d offset %llu length %llu before " | |
1146 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1147 | __func__, lseg, lseg->pls_range.iomode, |
1148 | lseg->pls_range.offset, lseg->pls_range.length, | |
1149 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1150 | lp->pls_range.length); | |
fb3296eb | 1151 | goto out; |
974cec8c | 1152 | } |
fb3296eb BH |
1153 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1154 | dprintk("%s: inserted lseg %p " | |
1155 | "iomode %d offset %llu length %llu at tail\n", | |
1156 | __func__, lseg, lseg->pls_range.iomode, | |
1157 | lseg->pls_range.offset, lseg->pls_range.length); | |
1158 | out: | |
70c3bd2b | 1159 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1160 | |
1161 | dprintk("%s:Return\n", __func__); | |
e5e94017 BH |
1162 | } |
1163 | ||
1164 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1165 | alloc_init_layout_hdr(struct inode *ino, |
1166 | struct nfs_open_context *ctx, | |
1167 | gfp_t gfp_flags) | |
e5e94017 BH |
1168 | { |
1169 | struct pnfs_layout_hdr *lo; | |
1170 | ||
636fb9c8 | 1171 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1172 | if (!lo) |
1173 | return NULL; | |
cc6e5340 | 1174 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1175 | INIT_LIST_HEAD(&lo->plh_layouts); |
1176 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1177 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1178 | lo->plh_inode = ino; |
5cc2216d | 1179 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1180 | return lo; |
1181 | } | |
1182 | ||
1183 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1184 | pnfs_find_alloc_layout(struct inode *ino, |
1185 | struct nfs_open_context *ctx, | |
1186 | gfp_t gfp_flags) | |
e5e94017 BH |
1187 | { |
1188 | struct nfs_inode *nfsi = NFS_I(ino); | |
1189 | struct pnfs_layout_hdr *new = NULL; | |
1190 | ||
1191 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1192 | ||
251ec410 TM |
1193 | if (nfsi->layout != NULL) |
1194 | goto out_existing; | |
e5e94017 | 1195 | spin_unlock(&ino->i_lock); |
9fa40758 | 1196 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1197 | spin_lock(&ino->i_lock); |
1198 | ||
251ec410 | 1199 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1200 | nfsi->layout = new; |
251ec410 | 1201 | return new; |
7175fe90 YN |
1202 | } else if (new != NULL) |
1203 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1204 | out_existing: |
1205 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1206 | return nfsi->layout; |
1207 | } | |
1208 | ||
b1f69b75 AA |
1209 | /* |
1210 | * iomode matching rules: | |
1211 | * iomode lseg match | |
1212 | * ----- ----- ----- | |
1213 | * ANY READ true | |
1214 | * ANY RW true | |
1215 | * RW READ false | |
1216 | * RW RW true | |
1217 | * READ READ true | |
1218 | * READ RW true | |
1219 | */ | |
3cb2df17 | 1220 | static bool |
7dc0ac70 | 1221 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
3cb2df17 | 1222 | const struct pnfs_layout_range *range) |
b1f69b75 | 1223 | { |
fb3296eb BH |
1224 | struct pnfs_layout_range range1; |
1225 | ||
1226 | if ((range->iomode == IOMODE_RW && | |
1227 | ls_range->iomode != IOMODE_RW) || | |
7dc0ac70 | 1228 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1229 | return 0; |
1230 | ||
1231 | /* range1 covers only the first byte in the range */ | |
1232 | range1 = *range; | |
1233 | range1.length = 1; | |
7dc0ac70 | 1234 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1235 | } |
1236 | ||
1237 | /* | |
1238 | * lookup range in layout | |
1239 | */ | |
e5e94017 | 1240 | static struct pnfs_layout_segment * |
fb3296eb BH |
1241 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1242 | struct pnfs_layout_range *range) | |
e5e94017 | 1243 | { |
b1f69b75 AA |
1244 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1245 | ||
1246 | dprintk("%s:Begin\n", __func__); | |
1247 | ||
b7edfaa1 | 1248 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1249 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1250 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
7dc0ac70 | 1251 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
9369a431 | 1252 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1253 | break; |
1254 | } | |
d771e3a4 | 1255 | if (lseg->pls_range.offset > range->offset) |
b1f69b75 AA |
1256 | break; |
1257 | } | |
1258 | ||
1259 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1260 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1261 | return ret; |
e5e94017 BH |
1262 | } |
1263 | ||
d23d61c8 AA |
1264 | /* |
1265 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1266 | * to the MDS or over pNFS | |
1267 | * | |
1268 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1269 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1270 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1271 | * WRITE request. | |
1272 | * | |
1273 | * A return of true means use MDS I/O. | |
1274 | * | |
1275 | * From rfc 5661: | |
1276 | * If a file's size is smaller than the file size threshold, data accesses | |
1277 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1278 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1279 | * server. If both file size and I/O size are provided, the client SHOULD | |
1280 | * reach or exceed both thresholds before sending its read or write | |
1281 | * requests to the data server. | |
1282 | */ | |
1283 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1284 | struct inode *ino, int iomode) | |
1285 | { | |
1286 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1287 | struct nfs_inode *nfsi = NFS_I(ino); | |
1288 | loff_t fsize = i_size_read(ino); | |
1289 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1290 | ||
1291 | if (t == NULL) | |
1292 | return ret; | |
1293 | ||
1294 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1295 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1296 | ||
1297 | switch (iomode) { | |
1298 | case IOMODE_READ: | |
1299 | if (t->bm & THRESHOLD_RD) { | |
1300 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1301 | size_set = true; | |
1302 | if (fsize < t->rd_sz) | |
1303 | size = true; | |
1304 | } | |
1305 | if (t->bm & THRESHOLD_RD_IO) { | |
1306 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1307 | nfsi->read_io); | |
1308 | io_set = true; | |
1309 | if (nfsi->read_io < t->rd_io_sz) | |
1310 | io = true; | |
1311 | } | |
1312 | break; | |
1313 | case IOMODE_RW: | |
1314 | if (t->bm & THRESHOLD_WR) { | |
1315 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1316 | size_set = true; | |
1317 | if (fsize < t->wr_sz) | |
1318 | size = true; | |
1319 | } | |
1320 | if (t->bm & THRESHOLD_WR_IO) { | |
1321 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1322 | nfsi->write_io); | |
1323 | io_set = true; | |
1324 | if (nfsi->write_io < t->wr_io_sz) | |
1325 | io = true; | |
1326 | } | |
1327 | break; | |
1328 | } | |
1329 | if (size_set && io_set) { | |
1330 | if (size && io) | |
1331 | ret = true; | |
1332 | } else if (size || io) | |
1333 | ret = true; | |
1334 | ||
1335 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1336 | return ret; | |
1337 | } | |
1338 | ||
e5e94017 BH |
1339 | /* |
1340 | * Layout segment is retreived from the server if not cached. | |
1341 | * The appropriate layout segment is referenced and returned to the caller. | |
1342 | */ | |
7c24d948 | 1343 | struct pnfs_layout_segment * |
e5e94017 BH |
1344 | pnfs_update_layout(struct inode *ino, |
1345 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1346 | loff_t pos, |
1347 | u64 count, | |
a75b9df9 TM |
1348 | enum pnfs_iomode iomode, |
1349 | gfp_t gfp_flags) | |
e5e94017 | 1350 | { |
fb3296eb BH |
1351 | struct pnfs_layout_range arg = { |
1352 | .iomode = iomode, | |
1353 | .offset = pos, | |
1354 | .length = count, | |
1355 | }; | |
707ed5fd | 1356 | unsigned pg_offset; |
6382a441 WAA |
1357 | struct nfs_server *server = NFS_SERVER(ino); |
1358 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1359 | struct pnfs_layout_hdr *lo; |
1360 | struct pnfs_layout_segment *lseg = NULL; | |
9bf87482 | 1361 | bool first; |
e5e94017 BH |
1362 | |
1363 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) | |
f86bbcf8 | 1364 | goto out; |
d23d61c8 AA |
1365 | |
1366 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) | |
f86bbcf8 | 1367 | goto out; |
d23d61c8 | 1368 | |
9bf87482 PT |
1369 | lookup_again: |
1370 | first = false; | |
e5e94017 | 1371 | spin_lock(&ino->i_lock); |
9fa40758 | 1372 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1373 | if (lo == NULL) { |
1374 | spin_unlock(&ino->i_lock); | |
1375 | goto out; | |
1376 | } | |
e5e94017 | 1377 | |
43f1b3da | 1378 | /* Do we even need to bother with this? */ |
a59c30ac | 1379 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da | 1380 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1381 | goto out_unlock; |
1382 | } | |
1383 | ||
1384 | /* if LAYOUTGET already failed once we don't try again */ | |
b9e028fd | 1385 | if (pnfs_layout_io_test_failed(lo, iomode)) |
e5e94017 BH |
1386 | goto out_unlock; |
1387 | ||
9bf87482 PT |
1388 | first = list_empty(&lo->plh_segs); |
1389 | if (first) { | |
1390 | /* The first layoutget for the file. Need to serialize per | |
1391 | * RFC 5661 Errata 3208. | |
1392 | */ | |
1393 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1394 | &lo->plh_flags)) { | |
1395 | spin_unlock(&ino->i_lock); | |
1396 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1397 | TASK_UNINTERRUPTIBLE); | |
1398 | pnfs_put_layout_hdr(lo); | |
1399 | goto lookup_again; | |
1400 | } | |
1401 | } else { | |
1402 | /* Check to see if the layout for the given range | |
1403 | * already exists | |
1404 | */ | |
1405 | lseg = pnfs_find_lseg(lo, &arg); | |
1406 | if (lseg) | |
1407 | goto out_unlock; | |
1408 | } | |
568e8c49 | 1409 | |
ce6ab4f2 | 1410 | if (pnfs_layoutgets_blocked(lo, &arg, 0)) |
cf7d63f1 FI |
1411 | goto out_unlock; |
1412 | atomic_inc(&lo->plh_outstanding); | |
f49f9baa | 1413 | spin_unlock(&ino->i_lock); |
30005121 | 1414 | |
abb9a007 | 1415 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1416 | /* The lo must be on the clp list if there is any |
1417 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1418 | */ | |
1419 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1420 | if (list_empty(&lo->plh_layouts)) |
1421 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1422 | spin_unlock(&clp->cl_lock); |
1423 | } | |
e5e94017 | 1424 | |
707ed5fd BH |
1425 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1426 | if (pg_offset) { | |
1427 | arg.offset -= pg_offset; | |
1428 | arg.length += pg_offset; | |
1429 | } | |
7c24d948 AA |
1430 | if (arg.length != NFS4_MAX_UINT64) |
1431 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1432 | |
fb3296eb | 1433 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
cf7d63f1 | 1434 | atomic_dec(&lo->plh_outstanding); |
830ffb56 | 1435 | out_put_layout_hdr: |
9bf87482 PT |
1436 | if (first) { |
1437 | unsigned long *bitlock = &lo->plh_flags; | |
1438 | ||
1439 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1440 | smp_mb__after_atomic(); | |
1441 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1442 | } | |
70c3bd2b | 1443 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1444 | out: |
f86bbcf8 TM |
1445 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1446 | "(%s, offset: %llu, length: %llu)\n", | |
1447 | __func__, ino->i_sb->s_id, | |
1448 | (unsigned long long)NFS_FILEID(ino), | |
1449 | lseg == NULL ? "not found" : "found", | |
1450 | iomode==IOMODE_RW ? "read/write" : "read-only", | |
1451 | (unsigned long long)pos, | |
1452 | (unsigned long long)count); | |
e5e94017 BH |
1453 | return lseg; |
1454 | out_unlock: | |
1455 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1456 | goto out_put_layout_hdr; |
e5e94017 | 1457 | } |
7c24d948 | 1458 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1459 | |
a0b0a6e3 | 1460 | struct pnfs_layout_segment * |
b1f69b75 AA |
1461 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1462 | { | |
1463 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1464 | struct nfs4_layoutget_res *res = &lgp->res; | |
1465 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1466 | struct inode *ino = lo->plh_inode; |
78096cca | 1467 | LIST_HEAD(free_me); |
b1f69b75 AA |
1468 | int status = 0; |
1469 | ||
1470 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1471 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1472 | if (!lseg || IS_ERR(lseg)) { |
1473 | if (!lseg) | |
1474 | status = -ENOMEM; | |
1475 | else | |
1476 | status = PTR_ERR(lseg); | |
1477 | dprintk("%s: Could not allocate layout: error %d\n", | |
1478 | __func__, status); | |
1479 | goto out; | |
1480 | } | |
1481 | ||
1013df61 CH |
1482 | init_lseg(lo, lseg); |
1483 | lseg->pls_range = res->range; | |
1484 | ||
b1f69b75 | 1485 | spin_lock(&ino->i_lock); |
a59c30ac | 1486 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da FI |
1487 | dprintk("%s forget reply due to recall\n", __func__); |
1488 | goto out_forget_reply; | |
1489 | } | |
1490 | ||
ce6ab4f2 | 1491 | if (pnfs_layoutgets_blocked(lo, &lgp->args.range, 1)) { |
43f1b3da FI |
1492 | dprintk("%s forget reply due to state\n", __func__); |
1493 | goto out_forget_reply; | |
1494 | } | |
038d6493 | 1495 | |
362f7474 CH |
1496 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1497 | /* existing state ID, make sure the sequence number matches. */ | |
1498 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1499 | dprintk("%s forget reply due to sequence\n", __func__); | |
1500 | goto out_forget_reply; | |
1501 | } | |
1502 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1503 | } else { | |
1504 | /* | |
1505 | * We got an entirely new state ID. Mark all segments for the | |
1506 | * inode invalid, and don't bother validating the stateid | |
1507 | * sequence number. | |
1508 | */ | |
1509 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); | |
1510 | ||
1511 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1512 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1513 | } | |
038d6493 | 1514 | |
47abadef CH |
1515 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
1516 | ||
9369a431 | 1517 | pnfs_get_lseg(lseg); |
57036a37 | 1518 | pnfs_layout_insert_lseg(lo, lseg); |
b1f69b75 | 1519 | |
f7e8917a FI |
1520 | if (res->return_on_close) { |
1521 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
1522 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); | |
1523 | } | |
1524 | ||
b1f69b75 | 1525 | spin_unlock(&ino->i_lock); |
78096cca | 1526 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1527 | return lseg; |
b1f69b75 | 1528 | out: |
a0b0a6e3 | 1529 | return ERR_PTR(status); |
43f1b3da FI |
1530 | |
1531 | out_forget_reply: | |
1532 | spin_unlock(&ino->i_lock); | |
1533 | lseg->pls_layout = lo; | |
1534 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1535 | goto out; | |
b1f69b75 AA |
1536 | } |
1537 | ||
016256df PT |
1538 | static void |
1539 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, | |
1540 | struct list_head *tmp_list, | |
1541 | struct pnfs_layout_range *return_range) | |
1542 | { | |
1543 | struct pnfs_layout_segment *lseg, *next; | |
1544 | ||
1545 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
1546 | ||
1547 | if (list_empty(&lo->plh_segs)) | |
1548 | return; | |
1549 | ||
1550 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
1551 | if (should_free_lseg(&lseg->pls_range, return_range)) { | |
1552 | dprintk("%s: marking lseg %p iomode %d " | |
1553 | "offset %llu length %llu\n", __func__, | |
1554 | lseg, lseg->pls_range.iomode, | |
1555 | lseg->pls_range.offset, | |
1556 | lseg->pls_range.length); | |
1557 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
1558 | mark_lseg_invalid(lseg, tmp_list); | |
1559 | } | |
1560 | } | |
1561 | ||
1562 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
1563 | struct pnfs_layout_segment *lseg) | |
1564 | { | |
1565 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
1566 | int iomode = pnfs_iomode_to_fail_bit(lseg->pls_range.iomode); | |
1567 | struct pnfs_layout_range range = { | |
1568 | .iomode = lseg->pls_range.iomode, | |
1569 | .offset = 0, | |
1570 | .length = NFS4_MAX_UINT64, | |
1571 | }; | |
1572 | LIST_HEAD(free_me); | |
1573 | ||
1574 | spin_lock(&inode->i_lock); | |
1575 | /* set failure bit so that pnfs path will be retried later */ | |
1576 | pnfs_layout_set_fail_bit(lo, iomode); | |
1577 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
1578 | if (lo->plh_return_iomode == 0) | |
1579 | lo->plh_return_iomode = range.iomode; | |
1580 | else if (lo->plh_return_iomode != range.iomode) | |
1581 | lo->plh_return_iomode = IOMODE_ANY; | |
1582 | /* | |
1583 | * mark all matching lsegs so that we are sure to have no live | |
1584 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
1585 | * for how it works. | |
1586 | */ | |
1587 | pnfs_mark_matching_lsegs_return(lo, &free_me, &range); | |
1588 | spin_unlock(&inode->i_lock); | |
1589 | pnfs_free_lseg_list(&free_me); | |
1590 | } | |
1591 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
1592 | ||
d8007d4d TM |
1593 | void |
1594 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1595 | { | |
1fd937bd PT |
1596 | u64 rd_size = req->wb_bytes; |
1597 | ||
bc5a89b3 | 1598 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
d8007d4d | 1599 | |
1fd937bd PT |
1600 | if (pgio->pg_dreq == NULL) |
1601 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1602 | else | |
1603 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1604 | ||
d8007d4d TM |
1605 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1606 | req->wb_context, | |
1607 | req_offset(req), | |
1fd937bd | 1608 | rd_size, |
d8007d4d TM |
1609 | IOMODE_READ, |
1610 | GFP_KERNEL); | |
e885de1a TM |
1611 | /* If no lseg, fall back to read through mds */ |
1612 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1613 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1614 | |
d8007d4d TM |
1615 | } |
1616 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1617 | ||
1618 | void | |
6296556f PT |
1619 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1620 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1621 | { |
bc5a89b3 | 1622 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
d8007d4d TM |
1623 | |
1624 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1625 | req->wb_context, | |
1626 | req_offset(req), | |
6296556f | 1627 | wb_size, |
d8007d4d TM |
1628 | IOMODE_RW, |
1629 | GFP_NOFS); | |
e885de1a TM |
1630 | /* If no lseg, fall back to write through mds */ |
1631 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1632 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1633 | } |
1634 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1635 | ||
180bb5ec WAA |
1636 | void |
1637 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
1638 | { | |
1639 | if (desc->pg_lseg) { | |
1640 | pnfs_put_lseg(desc->pg_lseg); | |
1641 | desc->pg_lseg = NULL; | |
1642 | } | |
1643 | } | |
1644 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
1645 | ||
b4fdac1a WAA |
1646 | /* |
1647 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1648 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1649 | */ | |
1650 | size_t | |
a7d42ddb WAA |
1651 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
1652 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 1653 | { |
0f9c429e | 1654 | unsigned int size; |
c5e20cb7 | 1655 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1656 | |
1657 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1658 | if (!size) |
1659 | return 0; | |
94ad1c80 | 1660 | |
19982ba8 | 1661 | /* |
c5e20cb7 WAA |
1662 | * 'size' contains the number of bytes left in the current page (up |
1663 | * to the original size asked for in @req->wb_bytes). | |
1664 | * | |
1665 | * Calculate how many bytes are left in the layout segment | |
1666 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1667 | * |
1668 | * Please also note that 'end_offset' is actually the offset of the | |
1669 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1670 | * | |
1671 | */ | |
19b54848 | 1672 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
1673 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
1674 | pgio->pg_lseg->pls_range.length); | |
1675 | req_start = req_offset(req); | |
1676 | WARN_ON_ONCE(req_start > seg_end); | |
1677 | /* start of request is past the last byte of this segment */ | |
1678 | if (req_start >= seg_end) | |
19b54848 | 1679 | return 0; |
c5e20cb7 WAA |
1680 | |
1681 | /* adjust 'size' iff there are fewer bytes left in the | |
1682 | * segment than what nfs_generic_pg_test returned */ | |
1683 | seg_left = seg_end - req_start; | |
1684 | if (seg_left < size) | |
1685 | size = (unsigned int)seg_left; | |
19b54848 | 1686 | } |
0f9c429e | 1687 | |
19b54848 | 1688 | return size; |
94ad1c80 | 1689 | } |
89a58e32 | 1690 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1691 | |
53113ad3 | 1692 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
1693 | { |
1694 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
1695 | |
1696 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
1697 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
1698 | hdr->completion_ops); | |
1699 | return nfs_pageio_resend(&pgio, hdr); | |
e2fecb21 | 1700 | } |
e7dd79af | 1701 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1702 | |
d45f60c6 | 1703 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1704 | { |
cd841605 FI |
1705 | |
1706 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1707 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1708 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1709 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1710 | } |
6c75dc0d | 1711 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1712 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
1713 | } |
1714 | ||
d20581aa BH |
1715 | /* |
1716 | * Called by non rpc-based layout drivers | |
1717 | */ | |
d45f60c6 | 1718 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 1719 | { |
d45f60c6 | 1720 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); |
cd841605 | 1721 | if (!hdr->pnfs_error) { |
d45f60c6 WAA |
1722 | pnfs_set_layoutcommit(hdr); |
1723 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
1acbbb4e | 1724 | } else |
d45f60c6 WAA |
1725 | pnfs_ld_handle_write_error(hdr); |
1726 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 1727 | } |
d20581aa | 1728 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1729 | |
dce81290 TM |
1730 | static void |
1731 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1732 | struct nfs_pgio_header *hdr) |
dce81290 | 1733 | { |
48d635f1 | 1734 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1735 | |
6c75dc0d | 1736 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1737 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 1738 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 1739 | mirror->pg_recoalesce = 1; |
6c75dc0d | 1740 | } |
d45f60c6 | 1741 | nfs_pgio_data_destroy(hdr); |
dce81290 TM |
1742 | } |
1743 | ||
1744 | static enum pnfs_try_status | |
d45f60c6 | 1745 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
1746 | const struct rpc_call_ops *call_ops, |
1747 | struct pnfs_layout_segment *lseg, | |
1748 | int how) | |
0382b744 | 1749 | { |
cd841605 | 1750 | struct inode *inode = hdr->inode; |
0382b744 AA |
1751 | enum pnfs_try_status trypnfs; |
1752 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1753 | ||
cd841605 | 1754 | hdr->mds_ops = call_ops; |
0382b744 AA |
1755 | |
1756 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
1757 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
1758 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 1759 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 1760 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
1761 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1762 | return trypnfs; | |
1763 | } | |
1764 | ||
dce81290 | 1765 | static void |
7f714720 WAA |
1766 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
1767 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 1768 | { |
dce81290 TM |
1769 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
1770 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 1771 | enum pnfs_try_status trypnfs; |
dce81290 | 1772 | |
d45f60c6 | 1773 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 1774 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 1775 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
1776 | } |
1777 | ||
6c75dc0d FI |
1778 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
1779 | { | |
9369a431 | 1780 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 1781 | nfs_pgio_header_free(hdr); |
6c75dc0d | 1782 | } |
89d77c8f | 1783 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
6c75dc0d | 1784 | |
dce81290 TM |
1785 | int |
1786 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
1787 | { | |
48d635f1 | 1788 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1789 | |
6c75dc0d | 1790 | struct nfs_pgio_header *hdr; |
dce81290 TM |
1791 | int ret; |
1792 | ||
1e7f3a48 WAA |
1793 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
1794 | if (!hdr) { | |
a7d42ddb | 1795 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
6c75dc0d | 1796 | return -ENOMEM; |
dce81290 | 1797 | } |
6c75dc0d | 1798 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 1799 | |
9369a431 | 1800 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 1801 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 1802 | if (!ret) |
7f714720 | 1803 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 1804 | |
6c75dc0d | 1805 | return ret; |
dce81290 TM |
1806 | } |
1807 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
1808 | ||
53113ad3 | 1809 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
1810 | { |
1811 | struct nfs_pageio_descriptor pgio; | |
1812 | ||
1acbbb4e | 1813 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
1814 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
1815 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 1816 | } |
e7dd79af | 1817 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 1818 | |
d45f60c6 | 1819 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1820 | { |
cd841605 FI |
1821 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
1822 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1823 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1824 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1825 | } |
4db6e0b7 | 1826 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1827 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
1828 | } |
1829 | ||
d20581aa BH |
1830 | /* |
1831 | * Called by non rpc-based layout drivers | |
1832 | */ | |
d45f60c6 | 1833 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 1834 | { |
d45f60c6 | 1835 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
cd841605 | 1836 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
1837 | __nfs4_read_done_cb(hdr); |
1838 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
62e4a769 | 1839 | } else |
d45f60c6 WAA |
1840 | pnfs_ld_handle_read_error(hdr); |
1841 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
1842 | } |
1843 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
1844 | ||
493292dd TM |
1845 | static void |
1846 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1847 | struct nfs_pgio_header *hdr) |
493292dd | 1848 | { |
48d635f1 | 1849 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1850 | |
4db6e0b7 | 1851 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1852 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 1853 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 1854 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 1855 | } |
d45f60c6 | 1856 | nfs_pgio_data_destroy(hdr); |
493292dd TM |
1857 | } |
1858 | ||
64419a9b AA |
1859 | /* |
1860 | * Call the appropriate parallel I/O subsystem read function. | |
1861 | */ | |
493292dd | 1862 | static enum pnfs_try_status |
d45f60c6 | 1863 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
1864 | const struct rpc_call_ops *call_ops, |
1865 | struct pnfs_layout_segment *lseg) | |
64419a9b | 1866 | { |
cd841605 | 1867 | struct inode *inode = hdr->inode; |
64419a9b AA |
1868 | struct nfs_server *nfss = NFS_SERVER(inode); |
1869 | enum pnfs_try_status trypnfs; | |
1870 | ||
cd841605 | 1871 | hdr->mds_ops = call_ops; |
64419a9b AA |
1872 | |
1873 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 1874 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 1875 | |
d45f60c6 | 1876 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 1877 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 1878 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
1879 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1880 | return trypnfs; | |
1881 | } | |
863a3c6c | 1882 | |
ceb11e13 PT |
1883 | /* Resend all requests through pnfs. */ |
1884 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) | |
1885 | { | |
1886 | struct nfs_pageio_descriptor pgio; | |
1887 | ||
1888 | nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); | |
1889 | return nfs_pageio_resend(&pgio, hdr); | |
1890 | } | |
1891 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
1892 | ||
493292dd | 1893 | static void |
7f714720 | 1894 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 1895 | { |
493292dd TM |
1896 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
1897 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 1898 | enum pnfs_try_status trypnfs; |
ceb11e13 | 1899 | int err = 0; |
493292dd | 1900 | |
d45f60c6 | 1901 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 PT |
1902 | if (trypnfs == PNFS_TRY_AGAIN) |
1903 | err = pnfs_read_resend_pnfs(hdr); | |
1904 | if (trypnfs == PNFS_NOT_ATTEMPTED || err) | |
d45f60c6 | 1905 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
1906 | } |
1907 | ||
4db6e0b7 FI |
1908 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
1909 | { | |
9369a431 | 1910 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 1911 | nfs_pgio_header_free(hdr); |
4db6e0b7 | 1912 | } |
89d77c8f | 1913 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
4db6e0b7 | 1914 | |
493292dd TM |
1915 | int |
1916 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
1917 | { | |
48d635f1 | 1918 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1919 | |
4db6e0b7 | 1920 | struct nfs_pgio_header *hdr; |
493292dd TM |
1921 | int ret; |
1922 | ||
1e7f3a48 WAA |
1923 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
1924 | if (!hdr) { | |
a7d42ddb | 1925 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
180bb5ec | 1926 | return -ENOMEM; |
493292dd | 1927 | } |
4db6e0b7 | 1928 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 1929 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 1930 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 1931 | if (!ret) |
7f714720 | 1932 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 1933 | return ret; |
493292dd TM |
1934 | } |
1935 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
1936 | ||
71244d9b TM |
1937 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
1938 | { | |
1939 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
1940 | ||
1941 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 1942 | smp_mb__after_atomic(); |
71244d9b TM |
1943 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
1944 | } | |
1945 | ||
863a3c6c | 1946 | /* |
a9bae566 | 1947 | * There can be multiple RW segments. |
863a3c6c | 1948 | */ |
a9bae566 | 1949 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 1950 | { |
a9bae566 | 1951 | struct pnfs_layout_segment *lseg; |
863a3c6c | 1952 | |
a9bae566 PT |
1953 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
1954 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 1955 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
1956 | list_add(&lseg->pls_lc_list, listp); |
1957 | } | |
863a3c6c AA |
1958 | } |
1959 | ||
a073dbff TM |
1960 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
1961 | { | |
1962 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
1963 | |
1964 | /* Matched by references in pnfs_set_layoutcommit */ | |
1965 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
1966 | list_del_init(&lseg->pls_lc_list); | |
1967 | pnfs_put_lseg(lseg); | |
1968 | } | |
1969 | ||
71244d9b | 1970 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
1971 | } |
1972 | ||
1b0ae068 PT |
1973 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
1974 | { | |
b9e028fd | 1975 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
1976 | } |
1977 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
1978 | ||
863a3c6c | 1979 | void |
d45f60c6 | 1980 | pnfs_set_layoutcommit(struct nfs_pgio_header *hdr) |
863a3c6c | 1981 | { |
cd841605 FI |
1982 | struct inode *inode = hdr->inode; |
1983 | struct nfs_inode *nfsi = NFS_I(inode); | |
d45f60c6 | 1984 | loff_t end_pos = hdr->mds_offset + hdr->res.count; |
79a48a1f | 1985 | bool mark_as_dirty = false; |
863a3c6c | 1986 | |
cd841605 | 1987 | spin_lock(&inode->i_lock); |
863a3c6c | 1988 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
79a48a1f | 1989 | mark_as_dirty = true; |
863a3c6c | 1990 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 1991 | __func__, inode->i_ino); |
863a3c6c | 1992 | } |
cd841605 | 1993 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
a9bae566 | 1994 | /* references matched in nfs4_layoutcommit_release */ |
9369a431 | 1995 | pnfs_get_lseg(hdr->lseg); |
a9bae566 | 1996 | } |
acff5880 PT |
1997 | if (end_pos > nfsi->layout->plh_lwb) |
1998 | nfsi->layout->plh_lwb = end_pos; | |
cd841605 | 1999 | spin_unlock(&inode->i_lock); |
acff5880 | 2000 | dprintk("%s: lseg %p end_pos %llu\n", |
cd841605 | 2001 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2002 | |
2003 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2004 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2005 | if (mark_as_dirty) | |
cd841605 | 2006 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2007 | } |
2008 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2009 | ||
378520b8 PT |
2010 | void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data) |
2011 | { | |
2012 | struct inode *inode = data->inode; | |
2013 | struct nfs_inode *nfsi = NFS_I(inode); | |
2014 | bool mark_as_dirty = false; | |
2015 | ||
2016 | spin_lock(&inode->i_lock); | |
2017 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { | |
2018 | mark_as_dirty = true; | |
2019 | dprintk("%s: Set layoutcommit for inode %lu ", | |
2020 | __func__, inode->i_ino); | |
2021 | } | |
2022 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &data->lseg->pls_flags)) { | |
2023 | /* references matched in nfs4_layoutcommit_release */ | |
2024 | pnfs_get_lseg(data->lseg); | |
2025 | } | |
2026 | if (data->lwb > nfsi->layout->plh_lwb) | |
2027 | nfsi->layout->plh_lwb = data->lwb; | |
2028 | spin_unlock(&inode->i_lock); | |
2029 | dprintk("%s: lseg %p end_pos %llu\n", | |
2030 | __func__, data->lseg, nfsi->layout->plh_lwb); | |
2031 | ||
2032 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2033 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2034 | if (mark_as_dirty) | |
2035 | mark_inode_dirty_sync(inode); | |
2036 | } | |
2037 | EXPORT_SYMBOL_GPL(pnfs_commit_set_layoutcommit); | |
2038 | ||
db29c089 AA |
2039 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2040 | { | |
2041 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2042 | ||
2043 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2044 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2045 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2046 | } |
2047 | ||
de4b15c7 AA |
2048 | /* |
2049 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2050 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2051 | * data to disk to allow the server to recover the data if it crashes. | |
2052 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2053 | * is off, and a COMMIT is sent to a data server, or | |
2054 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2055 | */ | |
863a3c6c | 2056 | int |
ef311537 | 2057 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2058 | { |
5f919c9f | 2059 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2060 | struct nfs4_layoutcommit_data *data; |
2061 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2062 | loff_t end_pos; |
71244d9b | 2063 | int status; |
863a3c6c | 2064 | |
71244d9b | 2065 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2066 | return 0; |
2067 | ||
71244d9b | 2068 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2069 | |
71244d9b | 2070 | status = -EAGAIN; |
92407e75 | 2071 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2072 | if (!sync) |
2073 | goto out; | |
74316201 | 2074 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2075 | NFS_INO_LAYOUTCOMMITTING, |
2076 | nfs_wait_bit_killable, | |
2077 | TASK_KILLABLE); | |
92407e75 | 2078 | if (status) |
71244d9b | 2079 | goto out; |
92407e75 PT |
2080 | } |
2081 | ||
71244d9b TM |
2082 | status = -ENOMEM; |
2083 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2084 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2085 | if (!data) | |
2086 | goto clear_layoutcommitting; | |
2087 | ||
2088 | status = 0; | |
de4b15c7 | 2089 | spin_lock(&inode->i_lock); |
71244d9b TM |
2090 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2091 | goto out_unlock; | |
a9bae566 | 2092 | |
71244d9b | 2093 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2094 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2095 | |
acff5880 | 2096 | end_pos = nfsi->layout->plh_lwb; |
acff5880 | 2097 | nfsi->layout->plh_lwb = 0; |
863a3c6c | 2098 | |
f597c537 | 2099 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2100 | spin_unlock(&inode->i_lock); |
2101 | ||
2102 | data->args.inode = inode; | |
9fa40758 | 2103 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2104 | nfs_fattr_init(&data->fattr); |
2105 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2106 | data->res.fattr = &data->fattr; | |
2107 | data->args.lastbytewritten = end_pos - 1; | |
2108 | data->res.server = NFS_SERVER(inode); | |
2109 | ||
5f919c9f CH |
2110 | if (ld->prepare_layoutcommit) { |
2111 | status = ld->prepare_layoutcommit(&data->args); | |
2112 | if (status) { | |
2113 | spin_lock(&inode->i_lock); | |
2114 | if (end_pos < nfsi->layout->plh_lwb) | |
2115 | nfsi->layout->plh_lwb = end_pos; | |
2116 | spin_unlock(&inode->i_lock); | |
2117 | put_rpccred(data->cred); | |
2118 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); | |
2119 | goto clear_layoutcommitting; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | ||
863a3c6c AA |
2124 | status = nfs4_proc_layoutcommit(data, sync); |
2125 | out: | |
92407e75 PT |
2126 | if (status) |
2127 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2128 | dprintk("<-- %s status %d\n", __func__, status); |
2129 | return status; | |
71244d9b TM |
2130 | out_unlock: |
2131 | spin_unlock(&inode->i_lock); | |
92407e75 | 2132 | kfree(data); |
71244d9b TM |
2133 | clear_layoutcommitting: |
2134 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2135 | goto out; |
863a3c6c | 2136 | } |
72cff449 | 2137 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a AA |
2138 | |
2139 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) | |
2140 | { | |
2141 | struct nfs4_threshold *thp; | |
2142 | ||
2143 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2144 | if (!thp) { | |
2145 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2146 | return NULL; | |
2147 | } | |
2148 | return thp; | |
2149 | } |