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" |
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 | ||
54 | /* Return the registered pnfs layout driver module matching given id */ | |
55 | static struct pnfs_layoutdriver_type * | |
56 | find_pnfs_driver_locked(u32 id) | |
57 | { | |
58 | struct pnfs_layoutdriver_type *local; | |
59 | ||
60 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
61 | if (local->id == id) | |
62 | goto out; | |
63 | local = NULL; | |
64 | out: | |
65 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
66 | return local; | |
67 | } | |
68 | ||
85e174ba RL |
69 | static struct pnfs_layoutdriver_type * |
70 | find_pnfs_driver(u32 id) | |
71 | { | |
02c35fca FI |
72 | struct pnfs_layoutdriver_type *local; |
73 | ||
74 | spin_lock(&pnfs_spinlock); | |
75 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
76 | if (local != NULL && !try_module_get(local->owner)) { |
77 | dprintk("%s: Could not grab reference on module\n", __func__); | |
78 | local = NULL; | |
79 | } | |
02c35fca FI |
80 | spin_unlock(&pnfs_spinlock); |
81 | return local; | |
85e174ba RL |
82 | } |
83 | ||
84 | void | |
85 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
86 | { | |
738fd0f3 BH |
87 | if (nfss->pnfs_curr_ld) { |
88 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
89 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
90 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
91 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
92 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 93 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 94 | } |
85e174ba RL |
95 | nfss->pnfs_curr_ld = NULL; |
96 | } | |
97 | ||
98 | /* | |
99 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
100 | * Currently only one pNFS layout driver per filesystem is supported. | |
101 | * | |
102 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
103 | */ | |
104 | void | |
738fd0f3 BH |
105 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
106 | u32 id) | |
85e174ba RL |
107 | { |
108 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
109 | ||
110 | if (id == 0) | |
111 | goto out_no_driver; | |
112 | if (!(server->nfs_client->cl_exchange_flags & | |
113 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
a030889a WAA |
114 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
115 | __func__, id, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
116 | goto out_no_driver; |
117 | } | |
118 | ld_type = find_pnfs_driver(id); | |
119 | if (!ld_type) { | |
120 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
121 | ld_type = find_pnfs_driver(id); | |
122 | if (!ld_type) { | |
123 | dprintk("%s: No pNFS module found for %u.\n", | |
124 | __func__, id); | |
125 | goto out_no_driver; | |
126 | } | |
127 | } | |
128 | server->pnfs_curr_ld = ld_type; | |
738fd0f3 BH |
129 | if (ld_type->set_layoutdriver |
130 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
131 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
132 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
133 | module_put(ld_type->owner); |
134 | goto out_no_driver; | |
135 | } | |
2a4c8994 TM |
136 | /* Bump the MDS count */ |
137 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 138 | |
85e174ba RL |
139 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
140 | return; | |
141 | ||
142 | out_no_driver: | |
143 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
144 | server->pnfs_curr_ld = NULL; | |
145 | } | |
02c35fca FI |
146 | |
147 | int | |
148 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
149 | { | |
150 | int status = -EINVAL; | |
151 | struct pnfs_layoutdriver_type *tmp; | |
152 | ||
153 | if (ld_type->id == 0) { | |
a030889a | 154 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
155 | return status; |
156 | } | |
b1f69b75 | 157 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 158 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
159 | "alloc_lseg and free_lseg.\n", __func__); |
160 | return status; | |
161 | } | |
02c35fca FI |
162 | |
163 | spin_lock(&pnfs_spinlock); | |
164 | tmp = find_pnfs_driver_locked(ld_type->id); | |
165 | if (!tmp) { | |
166 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
167 | status = 0; | |
168 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
169 | ld_type->name); | |
170 | } else { | |
a030889a | 171 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
172 | __func__, ld_type->id); |
173 | } | |
174 | spin_unlock(&pnfs_spinlock); | |
175 | ||
176 | return status; | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
179 | ||
180 | void | |
181 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
182 | { | |
183 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
184 | spin_lock(&pnfs_spinlock); | |
185 | list_del(&ld_type->pnfs_tblid); | |
186 | spin_unlock(&pnfs_spinlock); | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 189 | |
b1f69b75 AA |
190 | /* |
191 | * pNFS client layout cache | |
192 | */ | |
193 | ||
cc6e5340 | 194 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 195 | void |
70c3bd2b | 196 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 197 | { |
cc6e5340 | 198 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
199 | } |
200 | ||
636fb9c8 BH |
201 | static struct pnfs_layout_hdr * |
202 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
203 | { | |
204 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 205 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
206 | } |
207 | ||
208 | static void | |
209 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
210 | { | |
9c626381 TM |
211 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
212 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
213 | ||
214 | if (!list_empty(&lo->plh_layouts)) { | |
215 | struct nfs_client *clp = server->nfs_client; | |
216 | ||
217 | spin_lock(&clp->cl_lock); | |
218 | list_del_init(&lo->plh_layouts); | |
219 | spin_unlock(&clp->cl_lock); | |
220 | } | |
9fa40758 | 221 | put_rpccred(lo->plh_lc_cred); |
57934278 | 222 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
223 | } |
224 | ||
e5e94017 | 225 | static void |
6622c3ea | 226 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 227 | { |
bb346f63 | 228 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 229 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
230 | nfsi->layout = NULL; |
231 | /* Reset MDS Threshold I/O counters */ | |
232 | nfsi->write_io = 0; | |
233 | nfsi->read_io = 0; | |
e5e94017 BH |
234 | } |
235 | ||
b1f69b75 | 236 | void |
70c3bd2b | 237 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 238 | { |
cc6e5340 FI |
239 | struct inode *inode = lo->plh_inode; |
240 | ||
241 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { | |
6622c3ea | 242 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 243 | spin_unlock(&inode->i_lock); |
6622c3ea | 244 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 245 | } |
974cec8c AA |
246 | } |
247 | ||
b9e028fd TM |
248 | static int |
249 | pnfs_iomode_to_fail_bit(u32 iomode) | |
250 | { | |
251 | return iomode == IOMODE_RW ? | |
252 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
253 | } | |
254 | ||
255 | static void | |
3e621214 | 256 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 257 | { |
25c75333 | 258 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 259 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
260 | atomic_inc(&lo->plh_refcount); |
261 | } | |
262 | ||
263 | static void | |
264 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
265 | { | |
266 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
267 | atomic_dec(&lo->plh_refcount); | |
268 | } | |
269 | ||
270 | static void | |
271 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
272 | { | |
273 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
274 | struct pnfs_layout_range range = { |
275 | .iomode = iomode, | |
276 | .offset = 0, | |
277 | .length = NFS4_MAX_UINT64, | |
278 | }; | |
279 | LIST_HEAD(head); | |
3e621214 TM |
280 | |
281 | spin_lock(&inode->i_lock); | |
282 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 283 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 284 | spin_unlock(&inode->i_lock); |
115ce575 | 285 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
286 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
287 | iomode == IOMODE_RW ? "RW" : "READ"); | |
288 | } | |
289 | ||
290 | static bool | |
291 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
292 | { | |
25c75333 | 293 | unsigned long start, end; |
3e621214 TM |
294 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
295 | ||
296 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
297 | return false; |
298 | end = jiffies; | |
299 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
300 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
301 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 302 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
303 | return false; |
304 | } | |
305 | return true; | |
b9e028fd TM |
306 | } |
307 | ||
974cec8c AA |
308 | static void |
309 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
310 | { | |
566052c5 | 311 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 312 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
313 | atomic_set(&lseg->pls_refcount, 1); |
314 | smp_mb(); | |
315 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 316 | lseg->pls_layout = lo; |
974cec8c AA |
317 | } |
318 | ||
905ca191 | 319 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 320 | { |
b7edfaa1 | 321 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 322 | |
b1f69b75 | 323 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
324 | } |
325 | ||
d684d2ae | 326 | static void |
57036a37 TM |
327 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
328 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 329 | { |
57036a37 | 330 | struct inode *inode = lo->plh_inode; |
d684d2ae | 331 | |
d20581aa | 332 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 333 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
334 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
335 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
336 | if (list_empty(&lo->plh_segs)) |
337 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
338 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
339 | } | |
340 | ||
bae724ef | 341 | void |
9369a431 | 342 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 343 | { |
57036a37 | 344 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
345 | struct inode *inode; |
346 | ||
347 | if (!lseg) | |
348 | return; | |
349 | ||
4541d16c FI |
350 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
351 | atomic_read(&lseg->pls_refcount), | |
352 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
57036a37 TM |
353 | lo = lseg->pls_layout; |
354 | inode = lo->plh_inode; | |
d684d2ae | 355 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
8f0d27dc | 356 | pnfs_get_layout_hdr(lo); |
57036a37 | 357 | pnfs_layout_remove_lseg(lo, lseg); |
d684d2ae | 358 | spin_unlock(&inode->i_lock); |
905ca191 | 359 | pnfs_free_lseg(lseg); |
8f0d27dc | 360 | pnfs_put_layout_hdr(lo); |
4541d16c | 361 | } |
4541d16c | 362 | } |
9369a431 | 363 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 364 | |
6543f803 | 365 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
366 | { |
367 | struct pnfs_layout_segment *lseg; | |
6543f803 | 368 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
369 | |
370 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 371 | lo = lseg->pls_layout; |
e6cf82d1 | 372 | |
6543f803 TM |
373 | pnfs_free_lseg(lseg); |
374 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
375 | } |
376 | ||
6543f803 | 377 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 378 | { |
6543f803 | 379 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
380 | schedule_work(&lseg->pls_work); |
381 | } | |
6543f803 TM |
382 | |
383 | void | |
384 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
385 | { | |
386 | if (!lseg) | |
387 | return; | |
388 | ||
389 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
390 | ||
391 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
392 | atomic_read(&lseg->pls_refcount), | |
393 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
394 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
395 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
396 | pnfs_get_layout_hdr(lo); | |
397 | pnfs_layout_remove_lseg(lo, lseg); | |
398 | pnfs_free_lseg_async(lseg); | |
399 | } | |
400 | } | |
401 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 402 | |
3cb2df17 | 403 | static u64 |
fb3296eb BH |
404 | end_offset(u64 start, u64 len) |
405 | { | |
406 | u64 end; | |
407 | ||
408 | end = start + len; | |
409 | return end >= start ? end : NFS4_MAX_UINT64; | |
410 | } | |
411 | ||
fb3296eb BH |
412 | /* |
413 | * is l2 fully contained in l1? | |
414 | * start1 end1 | |
415 | * [----------------------------------) | |
416 | * start2 end2 | |
417 | * [----------------) | |
418 | */ | |
3cb2df17 | 419 | static bool |
7dc0ac70 | 420 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 421 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
422 | { |
423 | u64 start1 = l1->offset; | |
424 | u64 end1 = end_offset(start1, l1->length); | |
425 | u64 start2 = l2->offset; | |
426 | u64 end2 = end_offset(start2, l2->length); | |
427 | ||
428 | return (start1 <= start2) && (end1 >= end2); | |
429 | } | |
430 | ||
431 | /* | |
432 | * is l1 and l2 intersecting? | |
433 | * start1 end1 | |
434 | * [----------------------------------) | |
435 | * start2 end2 | |
436 | * [----------------) | |
437 | */ | |
3cb2df17 | 438 | static bool |
7dc0ac70 | 439 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 440 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
441 | { |
442 | u64 start1 = l1->offset; | |
443 | u64 end1 = end_offset(start1, l1->length); | |
444 | u64 start2 = l2->offset; | |
445 | u64 end2 = end_offset(start2, l2->length); | |
446 | ||
447 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
448 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
449 | } | |
450 | ||
4541d16c | 451 | static bool |
3cb2df17 TM |
452 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
453 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 454 | { |
778b5502 BH |
455 | return (recall_range->iomode == IOMODE_ANY || |
456 | lseg_range->iomode == recall_range->iomode) && | |
7dc0ac70 | 457 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
974cec8c AA |
458 | } |
459 | ||
24956804 TM |
460 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
461 | struct list_head *tmp_list) | |
462 | { | |
463 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
464 | return false; | |
465 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
466 | list_add(&lseg->pls_list, tmp_list); | |
467 | return true; | |
468 | } | |
469 | ||
4541d16c FI |
470 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
471 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
472 | struct list_head *tmp_list) | |
473 | { | |
474 | int rv = 0; | |
475 | ||
476 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
477 | /* Remove the reference keeping the lseg in the | |
478 | * list. It will now be removed when all | |
479 | * outstanding io is finished. | |
480 | */ | |
d684d2ae FI |
481 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
482 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 483 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 484 | rv = 1; |
4541d16c FI |
485 | } |
486 | return rv; | |
487 | } | |
488 | ||
489 | /* Returns count of number of matching invalid lsegs remaining in list | |
490 | * after call. | |
491 | */ | |
43f1b3da | 492 | int |
49a85061 | 493 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 494 | struct list_head *tmp_list, |
778b5502 | 495 | struct pnfs_layout_range *recall_range) |
974cec8c AA |
496 | { |
497 | struct pnfs_layout_segment *lseg, *next; | |
4541d16c | 498 | int invalid = 0, removed = 0; |
974cec8c AA |
499 | |
500 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
501 | ||
8006bfba | 502 | if (list_empty(&lo->plh_segs)) |
38511722 | 503 | return 0; |
4541d16c | 504 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
505 | if (!recall_range || |
506 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
507 | dprintk("%s: freeing lseg %p iomode %d " |
508 | "offset %llu length %llu\n", __func__, | |
509 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
510 | lseg->pls_range.length); | |
511 | invalid++; | |
512 | removed += mark_lseg_invalid(lseg, tmp_list); | |
513 | } | |
514 | dprintk("%s:Return %i\n", __func__, invalid - removed); | |
515 | return invalid - removed; | |
974cec8c AA |
516 | } |
517 | ||
f49f9baa | 518 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 519 | void |
4541d16c | 520 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 521 | { |
4541d16c | 522 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
523 | |
524 | if (list_empty(free_me)) | |
525 | return; | |
526 | ||
4541d16c | 527 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 528 | list_del(&lseg->pls_list); |
905ca191 | 529 | pnfs_free_lseg(lseg); |
974cec8c AA |
530 | } |
531 | } | |
532 | ||
e5e94017 BH |
533 | void |
534 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
535 | { | |
536 | struct pnfs_layout_hdr *lo; | |
974cec8c | 537 | LIST_HEAD(tmp_list); |
e5e94017 BH |
538 | |
539 | spin_lock(&nfsi->vfs_inode.i_lock); | |
540 | lo = nfsi->layout; | |
541 | if (lo) { | |
38511722 | 542 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
49a85061 | 543 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
3e621214 TM |
544 | pnfs_get_layout_hdr(lo); |
545 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); | |
546 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
547 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
548 | pnfs_free_lseg_list(&tmp_list); | |
549 | pnfs_put_layout_hdr(lo); | |
550 | } else | |
551 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 552 | } |
041245c8 | 553 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 554 | |
fd9a8d71 TM |
555 | static bool |
556 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
557 | struct list_head *layout_list) | |
974cec8c AA |
558 | { |
559 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 560 | bool ret = false; |
974cec8c | 561 | |
fd9a8d71 TM |
562 | spin_lock(&inode->i_lock); |
563 | lo = NFS_I(inode)->layout; | |
564 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
565 | pnfs_get_layout_hdr(lo); | |
566 | list_add(&lo->plh_bulk_destroy, layout_list); | |
567 | ret = true; | |
568 | } | |
569 | spin_unlock(&inode->i_lock); | |
570 | return ret; | |
571 | } | |
572 | ||
573 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
574 | static int | |
575 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
576 | struct nfs_server *server, | |
577 | struct list_head *layout_list) | |
578 | { | |
579 | struct pnfs_layout_hdr *lo, *next; | |
580 | struct inode *inode; | |
581 | ||
582 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
583 | inode = igrab(lo->plh_inode); | |
584 | if (inode == NULL) | |
585 | continue; | |
586 | list_del_init(&lo->plh_layouts); | |
587 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
588 | continue; | |
589 | rcu_read_unlock(); | |
590 | spin_unlock(&clp->cl_lock); | |
591 | iput(inode); | |
592 | spin_lock(&clp->cl_lock); | |
593 | rcu_read_lock(); | |
594 | return -EAGAIN; | |
595 | } | |
596 | return 0; | |
597 | } | |
598 | ||
599 | static int | |
600 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
601 | bool is_bulk_recall) | |
602 | { | |
603 | struct pnfs_layout_hdr *lo; | |
604 | struct inode *inode; | |
605 | struct pnfs_layout_range range = { | |
606 | .iomode = IOMODE_ANY, | |
607 | .offset = 0, | |
608 | .length = NFS4_MAX_UINT64, | |
609 | }; | |
610 | LIST_HEAD(lseg_list); | |
611 | int ret = 0; | |
612 | ||
613 | while (!list_empty(layout_list)) { | |
614 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
615 | plh_bulk_destroy); | |
616 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
617 | lo->plh_inode->i_ino); | |
618 | inode = lo->plh_inode; | |
7c5d1875 CH |
619 | |
620 | pnfs_layoutcommit_inode(inode, false); | |
621 | ||
fd9a8d71 TM |
622 | spin_lock(&inode->i_lock); |
623 | list_del_init(&lo->plh_bulk_destroy); | |
624 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ | |
625 | if (is_bulk_recall) | |
626 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
627 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) | |
628 | ret = -EAGAIN; | |
629 | spin_unlock(&inode->i_lock); | |
630 | pnfs_free_lseg_list(&lseg_list); | |
631 | pnfs_put_layout_hdr(lo); | |
632 | iput(inode); | |
633 | } | |
634 | return ret; | |
635 | } | |
636 | ||
637 | int | |
638 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
639 | struct nfs_fsid *fsid, | |
640 | bool is_recall) | |
641 | { | |
642 | struct nfs_server *server; | |
643 | LIST_HEAD(layout_list); | |
c47abcf8 | 644 | |
974cec8c | 645 | spin_lock(&clp->cl_lock); |
6382a441 | 646 | rcu_read_lock(); |
fd9a8d71 | 647 | restart: |
6382a441 | 648 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
649 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
650 | continue; | |
651 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
652 | server, | |
653 | &layout_list) != 0) | |
654 | goto restart; | |
6382a441 WAA |
655 | } |
656 | rcu_read_unlock(); | |
974cec8c AA |
657 | spin_unlock(&clp->cl_lock); |
658 | ||
fd9a8d71 TM |
659 | if (list_empty(&layout_list)) |
660 | return 0; | |
661 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
662 | } | |
663 | ||
664 | int | |
665 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
666 | bool is_recall) | |
667 | { | |
668 | struct nfs_server *server; | |
669 | LIST_HEAD(layout_list); | |
670 | ||
671 | spin_lock(&clp->cl_lock); | |
672 | rcu_read_lock(); | |
673 | restart: | |
674 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
675 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
676 | server, | |
677 | &layout_list) != 0) | |
678 | goto restart; | |
974cec8c | 679 | } |
fd9a8d71 TM |
680 | rcu_read_unlock(); |
681 | spin_unlock(&clp->cl_lock); | |
682 | ||
683 | if (list_empty(&layout_list)) | |
684 | return 0; | |
685 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
686 | } | |
687 | ||
688 | /* | |
689 | * Called by the state manger to remove all layouts established under an | |
690 | * expired lease. | |
691 | */ | |
692 | void | |
693 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
694 | { | |
695 | nfs4_deviceid_mark_client_invalid(clp); | |
696 | nfs4_deviceid_purge_client(clp); | |
697 | ||
698 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
699 | } |
700 | ||
5a65503f TM |
701 | /* |
702 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
703 | * taking into account wraparound issues. | |
704 | */ | |
705 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
706 | { | |
2c64c57d | 707 | return (s32)(s1 - s2) > 0; |
5a65503f TM |
708 | } |
709 | ||
fd6002e9 | 710 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
711 | void |
712 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
713 | bool update_barrier) | |
b1f69b75 | 714 | { |
22aaf714 TM |
715 | u32 oldseq, newseq, new_barrier; |
716 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 717 | |
2d2f24ad TM |
718 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
719 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 720 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 721 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 722 | if (update_barrier) { |
22aaf714 | 723 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
724 | } else { |
725 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 726 | * "close" to the current seqids. |
43f1b3da | 727 | */ |
22aaf714 | 728 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 729 | } |
22aaf714 TM |
730 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
731 | lo->plh_barrier = new_barrier; | |
43f1b3da | 732 | } |
b1f69b75 AA |
733 | } |
734 | ||
cf7d63f1 | 735 | static bool |
19c54aba TM |
736 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
737 | const nfs4_stateid *stateid) | |
43f1b3da | 738 | { |
19c54aba | 739 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 740 | |
19c54aba TM |
741 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
742 | } | |
743 | ||
744 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
745 | static bool | |
746 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, int lget) | |
747 | { | |
f7e8917a FI |
748 | return lo->plh_block_lgets || |
749 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
43f1b3da | 750 | (list_empty(&lo->plh_segs) && |
cf7d63f1 FI |
751 | (atomic_read(&lo->plh_outstanding) > lget)); |
752 | } | |
753 | ||
fd6002e9 FI |
754 | int |
755 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
756 | struct nfs4_state *open_state) | |
b1f69b75 | 757 | { |
fd6002e9 | 758 | int status = 0; |
974cec8c | 759 | |
b1f69b75 | 760 | dprintk("--> %s\n", __func__); |
fd6002e9 | 761 | spin_lock(&lo->plh_inode->i_lock); |
19c54aba | 762 | if (pnfs_layoutgets_blocked(lo, 1)) { |
cf7d63f1 | 763 | status = -EAGAIN; |
5d422301 TM |
764 | } else if (!nfs4_valid_open_stateid(open_state)) { |
765 | status = -EBADF; | |
47abadef CH |
766 | } else if (list_empty(&lo->plh_segs) || |
767 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { | |
fd6002e9 FI |
768 | int seq; |
769 | ||
770 | do { | |
771 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 772 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
773 | } while (read_seqretry(&open_state->seqlock, seq)); |
774 | } else | |
f597c537 | 775 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 776 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 777 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 778 | return status; |
b1f69b75 AA |
779 | } |
780 | ||
781 | /* | |
782 | * Get layout from server. | |
783 | * for now, assume that whole file layouts are requested. | |
784 | * arg->offset: 0 | |
785 | * arg->length: all ones | |
786 | */ | |
e5e94017 BH |
787 | static struct pnfs_layout_segment * |
788 | send_layoutget(struct pnfs_layout_hdr *lo, | |
789 | struct nfs_open_context *ctx, | |
fb3296eb | 790 | struct pnfs_layout_range *range, |
a75b9df9 | 791 | gfp_t gfp_flags) |
e5e94017 | 792 | { |
b7edfaa1 | 793 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
794 | struct nfs_server *server = NFS_SERVER(ino); |
795 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 796 | struct pnfs_layout_segment *lseg; |
b1f69b75 AA |
797 | |
798 | dprintk("--> %s\n", __func__); | |
e5e94017 | 799 | |
a75b9df9 | 800 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
cf7d63f1 | 801 | if (lgp == NULL) |
b1f69b75 | 802 | return NULL; |
35124a09 | 803 | |
fb3296eb BH |
804 | lgp->args.minlength = PAGE_CACHE_SIZE; |
805 | if (lgp->args.minlength > range->length) | |
806 | lgp->args.minlength = range->length; | |
b1f69b75 | 807 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
fb3296eb | 808 | lgp->args.range = *range; |
b1f69b75 AA |
809 | lgp->args.type = server->pnfs_curr_ld->id; |
810 | lgp->args.inode = ino; | |
811 | lgp->args.ctx = get_nfs_open_context(ctx); | |
a75b9df9 | 812 | lgp->gfp_flags = gfp_flags; |
6ab59344 | 813 | lgp->cred = lo->plh_lc_cred; |
b1f69b75 AA |
814 | |
815 | /* Synchronously retrieve layout information from server and | |
816 | * store in lseg. | |
817 | */ | |
a0b0a6e3 TM |
818 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
819 | if (IS_ERR(lseg)) { | |
820 | switch (PTR_ERR(lseg)) { | |
821 | case -ENOMEM: | |
822 | case -ERESTARTSYS: | |
823 | break; | |
824 | default: | |
825 | /* remember that LAYOUTGET failed and suspend trying */ | |
b9e028fd | 826 | pnfs_layout_io_set_failed(lo, range->iomode); |
a0b0a6e3 TM |
827 | } |
828 | return NULL; | |
974cec8c | 829 | } |
35124a09 | 830 | |
974cec8c AA |
831 | return lseg; |
832 | } | |
833 | ||
24956804 TM |
834 | static void pnfs_clear_layoutcommit(struct inode *inode, |
835 | struct list_head *head) | |
836 | { | |
837 | struct nfs_inode *nfsi = NFS_I(inode); | |
838 | struct pnfs_layout_segment *lseg, *tmp; | |
839 | ||
840 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
841 | return; | |
842 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
843 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
844 | continue; | |
845 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
846 | } | |
847 | } | |
848 | ||
293b3b06 AA |
849 | /* |
850 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
851 | * when the layout segment list is empty. | |
852 | * | |
853 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
854 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
855 | * deviceid is marked invalid. | |
856 | */ | |
cbe82603 BH |
857 | int |
858 | _pnfs_return_layout(struct inode *ino) | |
859 | { | |
860 | struct pnfs_layout_hdr *lo = NULL; | |
861 | struct nfs_inode *nfsi = NFS_I(ino); | |
862 | LIST_HEAD(tmp_list); | |
863 | struct nfs4_layoutreturn *lrp; | |
864 | nfs4_stateid stateid; | |
293b3b06 | 865 | int status = 0, empty; |
cbe82603 | 866 | |
366d5052 | 867 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
868 | |
869 | spin_lock(&ino->i_lock); | |
870 | lo = nfsi->layout; | |
e5929f3c | 871 | if (!lo) { |
cbe82603 | 872 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
873 | dprintk("NFS: %s no layout to return\n", __func__); |
874 | goto out; | |
cbe82603 BH |
875 | } |
876 | stateid = nfsi->layout->plh_stateid; | |
877 | /* Reference matched in nfs4_layoutreturn_release */ | |
70c3bd2b | 878 | pnfs_get_layout_hdr(lo); |
293b3b06 | 879 | empty = list_empty(&lo->plh_segs); |
24956804 | 880 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 881 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
c88953d8 CH |
882 | |
883 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
884 | struct pnfs_layout_range range = { | |
885 | .iomode = IOMODE_ANY, | |
886 | .offset = 0, | |
887 | .length = NFS4_MAX_UINT64, | |
888 | }; | |
889 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
890 | } | |
891 | ||
293b3b06 AA |
892 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
893 | if (empty) { | |
894 | spin_unlock(&ino->i_lock); | |
70c3bd2b | 895 | pnfs_put_layout_hdr(lo); |
293b3b06 AA |
896 | dprintk("NFS: %s no layout segments to return\n", __func__); |
897 | goto out; | |
898 | } | |
47abadef CH |
899 | |
900 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
ea0ded74 | 901 | lo->plh_block_lgets++; |
cbe82603 BH |
902 | spin_unlock(&ino->i_lock); |
903 | pnfs_free_lseg_list(&tmp_list); | |
904 | ||
cbe82603 BH |
905 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); |
906 | if (unlikely(lrp == NULL)) { | |
907 | status = -ENOMEM; | |
65857d57 TM |
908 | spin_lock(&ino->i_lock); |
909 | lo->plh_block_lgets--; | |
910 | spin_unlock(&ino->i_lock); | |
70c3bd2b | 911 | pnfs_put_layout_hdr(lo); |
cbe82603 BH |
912 | goto out; |
913 | } | |
914 | ||
915 | lrp->args.stateid = stateid; | |
916 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; | |
917 | lrp->args.inode = ino; | |
a56aaa02 | 918 | lrp->args.layout = lo; |
cbe82603 | 919 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
9556000d | 920 | lrp->cred = lo->plh_lc_cred; |
cbe82603 BH |
921 | |
922 | status = nfs4_proc_layoutreturn(lrp); | |
923 | out: | |
924 | dprintk("<-- %s status: %d\n", __func__, status); | |
925 | return status; | |
926 | } | |
0a57cdac | 927 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 928 | |
24028672 TM |
929 | int |
930 | pnfs_commit_and_return_layout(struct inode *inode) | |
931 | { | |
932 | struct pnfs_layout_hdr *lo; | |
933 | int ret; | |
934 | ||
935 | spin_lock(&inode->i_lock); | |
936 | lo = NFS_I(inode)->layout; | |
937 | if (lo == NULL) { | |
938 | spin_unlock(&inode->i_lock); | |
939 | return 0; | |
940 | } | |
941 | pnfs_get_layout_hdr(lo); | |
942 | /* Block new layoutgets and read/write to ds */ | |
943 | lo->plh_block_lgets++; | |
944 | spin_unlock(&inode->i_lock); | |
945 | filemap_fdatawait(inode->i_mapping); | |
946 | ret = pnfs_layoutcommit_inode(inode, true); | |
947 | if (ret == 0) | |
948 | ret = _pnfs_return_layout(inode); | |
949 | spin_lock(&inode->i_lock); | |
950 | lo->plh_block_lgets--; | |
951 | spin_unlock(&inode->i_lock); | |
952 | pnfs_put_layout_hdr(lo); | |
953 | return ret; | |
954 | } | |
955 | ||
f7e8917a FI |
956 | bool pnfs_roc(struct inode *ino) |
957 | { | |
40dd4b7a TM |
958 | struct nfs_inode *nfsi = NFS_I(ino); |
959 | struct nfs_open_context *ctx; | |
960 | struct nfs4_state *state; | |
f7e8917a FI |
961 | struct pnfs_layout_hdr *lo; |
962 | struct pnfs_layout_segment *lseg, *tmp; | |
963 | LIST_HEAD(tmp_list); | |
964 | bool found = false; | |
965 | ||
966 | spin_lock(&ino->i_lock); | |
40dd4b7a | 967 | lo = nfsi->layout; |
f7e8917a FI |
968 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || |
969 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) | |
40dd4b7a TM |
970 | goto out_noroc; |
971 | ||
972 | /* Don't return layout if we hold a delegation */ | |
973 | if (nfs4_check_delegation(ino, FMODE_READ)) | |
974 | goto out_noroc; | |
975 | ||
976 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
977 | state = ctx->state; | |
978 | /* Don't return layout if there is open file state */ | |
979 | if (state != NULL && state->state != 0) | |
980 | goto out_noroc; | |
981 | } | |
982 | ||
f7e8917a FI |
983 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
984 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
985 | mark_lseg_invalid(lseg, &tmp_list); | |
986 | found = true; | |
987 | } | |
988 | if (!found) | |
40dd4b7a | 989 | goto out_noroc; |
f7e8917a | 990 | lo->plh_block_lgets++; |
70c3bd2b | 991 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
f7e8917a FI |
992 | spin_unlock(&ino->i_lock); |
993 | pnfs_free_lseg_list(&tmp_list); | |
994 | return true; | |
995 | ||
40dd4b7a | 996 | out_noroc: |
f7e8917a FI |
997 | spin_unlock(&ino->i_lock); |
998 | return false; | |
999 | } | |
1000 | ||
1001 | void pnfs_roc_release(struct inode *ino) | |
1002 | { | |
1003 | struct pnfs_layout_hdr *lo; | |
1004 | ||
1005 | spin_lock(&ino->i_lock); | |
1006 | lo = NFS_I(ino)->layout; | |
1007 | lo->plh_block_lgets--; | |
6622c3ea TM |
1008 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1009 | pnfs_detach_layout_hdr(lo); | |
1010 | spin_unlock(&ino->i_lock); | |
1011 | pnfs_free_layout_hdr(lo); | |
1012 | } else | |
1013 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1014 | } |
1015 | ||
1016 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1017 | { | |
1018 | struct pnfs_layout_hdr *lo; | |
1019 | ||
1020 | spin_lock(&ino->i_lock); | |
1021 | lo = NFS_I(ino)->layout; | |
0f35ad6f | 1022 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1023 | lo->plh_barrier = barrier; |
1024 | spin_unlock(&ino->i_lock); | |
1025 | } | |
1026 | ||
7fdab069 | 1027 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
f7e8917a FI |
1028 | { |
1029 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1030 | struct pnfs_layout_hdr *lo; |
f7e8917a | 1031 | struct pnfs_layout_segment *lseg; |
7fdab069 | 1032 | u32 current_seqid; |
f7e8917a FI |
1033 | bool found = false; |
1034 | ||
1035 | spin_lock(&ino->i_lock); | |
1036 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) | |
1037 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
7fdab069 | 1038 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
f7e8917a | 1039 | found = true; |
7fdab069 | 1040 | goto out; |
f7e8917a | 1041 | } |
7fdab069 TM |
1042 | lo = nfsi->layout; |
1043 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1044 | |
7fdab069 TM |
1045 | /* Since close does not return a layout stateid for use as |
1046 | * a barrier, we choose the worst-case barrier. | |
1047 | */ | |
1048 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
1049 | out: | |
f7e8917a FI |
1050 | spin_unlock(&ino->i_lock); |
1051 | return found; | |
1052 | } | |
1053 | ||
b1f69b75 AA |
1054 | /* |
1055 | * Compare two layout segments for sorting into layout cache. | |
1056 | * We want to preferentially return RW over RO layouts, so ensure those | |
1057 | * are seen first. | |
1058 | */ | |
1059 | static s64 | |
7dc0ac70 | 1060 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1061 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1062 | { |
fb3296eb BH |
1063 | s64 d; |
1064 | ||
1065 | /* high offset > low offset */ | |
1066 | d = l1->offset - l2->offset; | |
1067 | if (d) | |
1068 | return d; | |
1069 | ||
1070 | /* short length > long length */ | |
1071 | d = l2->length - l1->length; | |
1072 | if (d) | |
1073 | return d; | |
1074 | ||
b1f69b75 | 1075 | /* read > read/write */ |
fb3296eb | 1076 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1077 | } |
1078 | ||
974cec8c | 1079 | static void |
57036a37 | 1080 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
974cec8c AA |
1081 | struct pnfs_layout_segment *lseg) |
1082 | { | |
b1f69b75 | 1083 | struct pnfs_layout_segment *lp; |
b1f69b75 | 1084 | |
974cec8c AA |
1085 | dprintk("%s:Begin\n", __func__); |
1086 | ||
b7edfaa1 | 1087 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
7dc0ac70 | 1088 | if (pnfs_lseg_range_cmp(&lseg->pls_range, &lp->pls_range) > 0) |
b1f69b75 | 1089 | continue; |
566052c5 | 1090 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1091 | dprintk("%s: inserted lseg %p " |
1092 | "iomode %d offset %llu length %llu before " | |
1093 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1094 | __func__, lseg, lseg->pls_range.iomode, |
1095 | lseg->pls_range.offset, lseg->pls_range.length, | |
1096 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1097 | lp->pls_range.length); | |
fb3296eb | 1098 | goto out; |
974cec8c | 1099 | } |
fb3296eb BH |
1100 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1101 | dprintk("%s: inserted lseg %p " | |
1102 | "iomode %d offset %llu length %llu at tail\n", | |
1103 | __func__, lseg, lseg->pls_range.iomode, | |
1104 | lseg->pls_range.offset, lseg->pls_range.length); | |
1105 | out: | |
70c3bd2b | 1106 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1107 | |
1108 | dprintk("%s:Return\n", __func__); | |
e5e94017 BH |
1109 | } |
1110 | ||
1111 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1112 | alloc_init_layout_hdr(struct inode *ino, |
1113 | struct nfs_open_context *ctx, | |
1114 | gfp_t gfp_flags) | |
e5e94017 BH |
1115 | { |
1116 | struct pnfs_layout_hdr *lo; | |
1117 | ||
636fb9c8 | 1118 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1119 | if (!lo) |
1120 | return NULL; | |
cc6e5340 | 1121 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1122 | INIT_LIST_HEAD(&lo->plh_layouts); |
1123 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1124 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1125 | lo->plh_inode = ino; |
5cc2216d | 1126 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1127 | return lo; |
1128 | } | |
1129 | ||
1130 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1131 | pnfs_find_alloc_layout(struct inode *ino, |
1132 | struct nfs_open_context *ctx, | |
1133 | gfp_t gfp_flags) | |
e5e94017 BH |
1134 | { |
1135 | struct nfs_inode *nfsi = NFS_I(ino); | |
1136 | struct pnfs_layout_hdr *new = NULL; | |
1137 | ||
1138 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1139 | ||
251ec410 TM |
1140 | if (nfsi->layout != NULL) |
1141 | goto out_existing; | |
e5e94017 | 1142 | spin_unlock(&ino->i_lock); |
9fa40758 | 1143 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1144 | spin_lock(&ino->i_lock); |
1145 | ||
251ec410 | 1146 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1147 | nfsi->layout = new; |
251ec410 | 1148 | return new; |
7175fe90 YN |
1149 | } else if (new != NULL) |
1150 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1151 | out_existing: |
1152 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1153 | return nfsi->layout; |
1154 | } | |
1155 | ||
b1f69b75 AA |
1156 | /* |
1157 | * iomode matching rules: | |
1158 | * iomode lseg match | |
1159 | * ----- ----- ----- | |
1160 | * ANY READ true | |
1161 | * ANY RW true | |
1162 | * RW READ false | |
1163 | * RW RW true | |
1164 | * READ READ true | |
1165 | * READ RW true | |
1166 | */ | |
3cb2df17 | 1167 | static bool |
7dc0ac70 | 1168 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
3cb2df17 | 1169 | const struct pnfs_layout_range *range) |
b1f69b75 | 1170 | { |
fb3296eb BH |
1171 | struct pnfs_layout_range range1; |
1172 | ||
1173 | if ((range->iomode == IOMODE_RW && | |
1174 | ls_range->iomode != IOMODE_RW) || | |
7dc0ac70 | 1175 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1176 | return 0; |
1177 | ||
1178 | /* range1 covers only the first byte in the range */ | |
1179 | range1 = *range; | |
1180 | range1.length = 1; | |
7dc0ac70 | 1181 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1182 | } |
1183 | ||
1184 | /* | |
1185 | * lookup range in layout | |
1186 | */ | |
e5e94017 | 1187 | static struct pnfs_layout_segment * |
fb3296eb BH |
1188 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1189 | struct pnfs_layout_range *range) | |
e5e94017 | 1190 | { |
b1f69b75 AA |
1191 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1192 | ||
1193 | dprintk("%s:Begin\n", __func__); | |
1194 | ||
b7edfaa1 | 1195 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1196 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
7dc0ac70 | 1197 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
9369a431 | 1198 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1199 | break; |
1200 | } | |
d771e3a4 | 1201 | if (lseg->pls_range.offset > range->offset) |
b1f69b75 AA |
1202 | break; |
1203 | } | |
1204 | ||
1205 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1206 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1207 | return ret; |
e5e94017 BH |
1208 | } |
1209 | ||
d23d61c8 AA |
1210 | /* |
1211 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1212 | * to the MDS or over pNFS | |
1213 | * | |
1214 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1215 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1216 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1217 | * WRITE request. | |
1218 | * | |
1219 | * A return of true means use MDS I/O. | |
1220 | * | |
1221 | * From rfc 5661: | |
1222 | * If a file's size is smaller than the file size threshold, data accesses | |
1223 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1224 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1225 | * server. If both file size and I/O size are provided, the client SHOULD | |
1226 | * reach or exceed both thresholds before sending its read or write | |
1227 | * requests to the data server. | |
1228 | */ | |
1229 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1230 | struct inode *ino, int iomode) | |
1231 | { | |
1232 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1233 | struct nfs_inode *nfsi = NFS_I(ino); | |
1234 | loff_t fsize = i_size_read(ino); | |
1235 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1236 | ||
1237 | if (t == NULL) | |
1238 | return ret; | |
1239 | ||
1240 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1241 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1242 | ||
1243 | switch (iomode) { | |
1244 | case IOMODE_READ: | |
1245 | if (t->bm & THRESHOLD_RD) { | |
1246 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1247 | size_set = true; | |
1248 | if (fsize < t->rd_sz) | |
1249 | size = true; | |
1250 | } | |
1251 | if (t->bm & THRESHOLD_RD_IO) { | |
1252 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1253 | nfsi->read_io); | |
1254 | io_set = true; | |
1255 | if (nfsi->read_io < t->rd_io_sz) | |
1256 | io = true; | |
1257 | } | |
1258 | break; | |
1259 | case IOMODE_RW: | |
1260 | if (t->bm & THRESHOLD_WR) { | |
1261 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1262 | size_set = true; | |
1263 | if (fsize < t->wr_sz) | |
1264 | size = true; | |
1265 | } | |
1266 | if (t->bm & THRESHOLD_WR_IO) { | |
1267 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1268 | nfsi->write_io); | |
1269 | io_set = true; | |
1270 | if (nfsi->write_io < t->wr_io_sz) | |
1271 | io = true; | |
1272 | } | |
1273 | break; | |
1274 | } | |
1275 | if (size_set && io_set) { | |
1276 | if (size && io) | |
1277 | ret = true; | |
1278 | } else if (size || io) | |
1279 | ret = true; | |
1280 | ||
1281 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1282 | return ret; | |
1283 | } | |
1284 | ||
e5e94017 BH |
1285 | /* |
1286 | * Layout segment is retreived from the server if not cached. | |
1287 | * The appropriate layout segment is referenced and returned to the caller. | |
1288 | */ | |
7c24d948 | 1289 | struct pnfs_layout_segment * |
e5e94017 BH |
1290 | pnfs_update_layout(struct inode *ino, |
1291 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1292 | loff_t pos, |
1293 | u64 count, | |
a75b9df9 TM |
1294 | enum pnfs_iomode iomode, |
1295 | gfp_t gfp_flags) | |
e5e94017 | 1296 | { |
fb3296eb BH |
1297 | struct pnfs_layout_range arg = { |
1298 | .iomode = iomode, | |
1299 | .offset = pos, | |
1300 | .length = count, | |
1301 | }; | |
707ed5fd | 1302 | unsigned pg_offset; |
6382a441 WAA |
1303 | struct nfs_server *server = NFS_SERVER(ino); |
1304 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1305 | struct pnfs_layout_hdr *lo; |
1306 | struct pnfs_layout_segment *lseg = NULL; | |
30005121 | 1307 | bool first; |
e5e94017 BH |
1308 | |
1309 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) | |
f86bbcf8 | 1310 | goto out; |
d23d61c8 AA |
1311 | |
1312 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) | |
f86bbcf8 | 1313 | goto out; |
d23d61c8 | 1314 | |
e5e94017 | 1315 | spin_lock(&ino->i_lock); |
9fa40758 | 1316 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1317 | if (lo == NULL) { |
1318 | spin_unlock(&ino->i_lock); | |
1319 | goto out; | |
1320 | } | |
e5e94017 | 1321 | |
43f1b3da | 1322 | /* Do we even need to bother with this? */ |
a59c30ac | 1323 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da | 1324 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1325 | goto out_unlock; |
1326 | } | |
1327 | ||
1328 | /* if LAYOUTGET already failed once we don't try again */ | |
b9e028fd | 1329 | if (pnfs_layout_io_test_failed(lo, iomode)) |
e5e94017 BH |
1330 | goto out_unlock; |
1331 | ||
568e8c49 | 1332 | /* Check to see if the layout for the given range already exists */ |
fb3296eb | 1333 | lseg = pnfs_find_lseg(lo, &arg); |
568e8c49 AA |
1334 | if (lseg) |
1335 | goto out_unlock; | |
1336 | ||
19c54aba | 1337 | if (pnfs_layoutgets_blocked(lo, 0)) |
cf7d63f1 FI |
1338 | goto out_unlock; |
1339 | atomic_inc(&lo->plh_outstanding); | |
1340 | ||
30005121 | 1341 | first = list_empty(&lo->plh_layouts) ? true : false; |
f49f9baa | 1342 | spin_unlock(&ino->i_lock); |
30005121 | 1343 | |
f49f9baa | 1344 | if (first) { |
2130ff66 FI |
1345 | /* The lo must be on the clp list if there is any |
1346 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1347 | */ | |
1348 | spin_lock(&clp->cl_lock); | |
6382a441 | 1349 | list_add_tail(&lo->plh_layouts, &server->layouts); |
2130ff66 FI |
1350 | spin_unlock(&clp->cl_lock); |
1351 | } | |
e5e94017 | 1352 | |
707ed5fd BH |
1353 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1354 | if (pg_offset) { | |
1355 | arg.offset -= pg_offset; | |
1356 | arg.length += pg_offset; | |
1357 | } | |
7c24d948 AA |
1358 | if (arg.length != NFS4_MAX_UINT64) |
1359 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1360 | |
fb3296eb | 1361 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
cf7d63f1 | 1362 | atomic_dec(&lo->plh_outstanding); |
830ffb56 | 1363 | out_put_layout_hdr: |
70c3bd2b | 1364 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1365 | out: |
f86bbcf8 TM |
1366 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1367 | "(%s, offset: %llu, length: %llu)\n", | |
1368 | __func__, ino->i_sb->s_id, | |
1369 | (unsigned long long)NFS_FILEID(ino), | |
1370 | lseg == NULL ? "not found" : "found", | |
1371 | iomode==IOMODE_RW ? "read/write" : "read-only", | |
1372 | (unsigned long long)pos, | |
1373 | (unsigned long long)count); | |
e5e94017 BH |
1374 | return lseg; |
1375 | out_unlock: | |
1376 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1377 | goto out_put_layout_hdr; |
e5e94017 | 1378 | } |
7c24d948 | 1379 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1380 | |
a0b0a6e3 | 1381 | struct pnfs_layout_segment * |
b1f69b75 AA |
1382 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1383 | { | |
1384 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1385 | struct nfs4_layoutget_res *res = &lgp->res; | |
1386 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1387 | struct inode *ino = lo->plh_inode; |
78096cca | 1388 | LIST_HEAD(free_me); |
b1f69b75 AA |
1389 | int status = 0; |
1390 | ||
1391 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1392 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1393 | if (!lseg || IS_ERR(lseg)) { |
1394 | if (!lseg) | |
1395 | status = -ENOMEM; | |
1396 | else | |
1397 | status = PTR_ERR(lseg); | |
1398 | dprintk("%s: Could not allocate layout: error %d\n", | |
1399 | __func__, status); | |
1400 | goto out; | |
1401 | } | |
1402 | ||
1013df61 CH |
1403 | init_lseg(lo, lseg); |
1404 | lseg->pls_range = res->range; | |
1405 | ||
b1f69b75 | 1406 | spin_lock(&ino->i_lock); |
a59c30ac | 1407 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da FI |
1408 | dprintk("%s forget reply due to recall\n", __func__); |
1409 | goto out_forget_reply; | |
1410 | } | |
1411 | ||
362f7474 | 1412 | if (pnfs_layoutgets_blocked(lo, 1)) { |
43f1b3da FI |
1413 | dprintk("%s forget reply due to state\n", __func__); |
1414 | goto out_forget_reply; | |
1415 | } | |
038d6493 | 1416 | |
362f7474 CH |
1417 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1418 | /* existing state ID, make sure the sequence number matches. */ | |
1419 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1420 | dprintk("%s forget reply due to sequence\n", __func__); | |
1421 | goto out_forget_reply; | |
1422 | } | |
1423 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1424 | } else { | |
1425 | /* | |
1426 | * We got an entirely new state ID. Mark all segments for the | |
1427 | * inode invalid, and don't bother validating the stateid | |
1428 | * sequence number. | |
1429 | */ | |
1430 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); | |
1431 | ||
1432 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1433 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1434 | } | |
038d6493 | 1435 | |
47abadef CH |
1436 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
1437 | ||
9369a431 | 1438 | pnfs_get_lseg(lseg); |
57036a37 | 1439 | pnfs_layout_insert_lseg(lo, lseg); |
b1f69b75 | 1440 | |
f7e8917a FI |
1441 | if (res->return_on_close) { |
1442 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
1443 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); | |
1444 | } | |
1445 | ||
b1f69b75 | 1446 | spin_unlock(&ino->i_lock); |
78096cca | 1447 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1448 | return lseg; |
b1f69b75 | 1449 | out: |
a0b0a6e3 | 1450 | return ERR_PTR(status); |
43f1b3da FI |
1451 | |
1452 | out_forget_reply: | |
1453 | spin_unlock(&ino->i_lock); | |
1454 | lseg->pls_layout = lo; | |
1455 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1456 | goto out; | |
b1f69b75 AA |
1457 | } |
1458 | ||
d8007d4d TM |
1459 | void |
1460 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1461 | { | |
1fd937bd PT |
1462 | u64 rd_size = req->wb_bytes; |
1463 | ||
bc5a89b3 | 1464 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
d8007d4d | 1465 | |
1fd937bd PT |
1466 | if (pgio->pg_dreq == NULL) |
1467 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1468 | else | |
1469 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1470 | ||
d8007d4d TM |
1471 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1472 | req->wb_context, | |
1473 | req_offset(req), | |
1fd937bd | 1474 | rd_size, |
d8007d4d TM |
1475 | IOMODE_READ, |
1476 | GFP_KERNEL); | |
e885de1a TM |
1477 | /* If no lseg, fall back to read through mds */ |
1478 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1479 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1480 | |
d8007d4d TM |
1481 | } |
1482 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1483 | ||
1484 | void | |
6296556f PT |
1485 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1486 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1487 | { |
bc5a89b3 | 1488 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
d8007d4d TM |
1489 | |
1490 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1491 | req->wb_context, | |
1492 | req_offset(req), | |
6296556f | 1493 | wb_size, |
d8007d4d TM |
1494 | IOMODE_RW, |
1495 | GFP_NOFS); | |
e885de1a TM |
1496 | /* If no lseg, fall back to write through mds */ |
1497 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1498 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1499 | } |
1500 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1501 | ||
b4fdac1a WAA |
1502 | /* |
1503 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1504 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1505 | */ | |
1506 | size_t | |
dfed206b BH |
1507 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
1508 | struct nfs_page *req) | |
94ad1c80 | 1509 | { |
0f9c429e | 1510 | unsigned int size; |
c5e20cb7 | 1511 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1512 | |
1513 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1514 | if (!size) |
1515 | return 0; | |
94ad1c80 | 1516 | |
19982ba8 | 1517 | /* |
c5e20cb7 WAA |
1518 | * 'size' contains the number of bytes left in the current page (up |
1519 | * to the original size asked for in @req->wb_bytes). | |
1520 | * | |
1521 | * Calculate how many bytes are left in the layout segment | |
1522 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1523 | * |
1524 | * Please also note that 'end_offset' is actually the offset of the | |
1525 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1526 | * | |
1527 | */ | |
19b54848 | 1528 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
1529 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
1530 | pgio->pg_lseg->pls_range.length); | |
1531 | req_start = req_offset(req); | |
1532 | WARN_ON_ONCE(req_start > seg_end); | |
1533 | /* start of request is past the last byte of this segment */ | |
1534 | if (req_start >= seg_end) | |
19b54848 | 1535 | return 0; |
c5e20cb7 WAA |
1536 | |
1537 | /* adjust 'size' iff there are fewer bytes left in the | |
1538 | * segment than what nfs_generic_pg_test returned */ | |
1539 | seg_left = seg_end - req_start; | |
1540 | if (seg_left < size) | |
1541 | size = (unsigned int)seg_left; | |
19b54848 | 1542 | } |
0f9c429e | 1543 | |
19b54848 | 1544 | return size; |
94ad1c80 | 1545 | } |
89a58e32 | 1546 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1547 | |
53113ad3 | 1548 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
1549 | { |
1550 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
1551 | |
1552 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
1553 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
1554 | hdr->completion_ops); | |
1555 | return nfs_pageio_resend(&pgio, hdr); | |
e2fecb21 | 1556 | } |
e7dd79af | 1557 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1558 | |
d45f60c6 | 1559 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1560 | { |
cd841605 FI |
1561 | |
1562 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1563 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1564 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1565 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1566 | } |
6c75dc0d | 1567 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1568 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
1569 | } |
1570 | ||
d20581aa BH |
1571 | /* |
1572 | * Called by non rpc-based layout drivers | |
1573 | */ | |
d45f60c6 | 1574 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 1575 | { |
d45f60c6 | 1576 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); |
cd841605 | 1577 | if (!hdr->pnfs_error) { |
d45f60c6 WAA |
1578 | pnfs_set_layoutcommit(hdr); |
1579 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
1acbbb4e | 1580 | } else |
d45f60c6 WAA |
1581 | pnfs_ld_handle_write_error(hdr); |
1582 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 1583 | } |
d20581aa | 1584 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1585 | |
dce81290 TM |
1586 | static void |
1587 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1588 | struct nfs_pgio_header *hdr) |
dce81290 | 1589 | { |
6c75dc0d FI |
1590 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
1591 | list_splice_tail_init(&hdr->pages, &desc->pg_list); | |
1592 | nfs_pageio_reset_write_mds(desc); | |
1593 | desc->pg_recoalesce = 1; | |
1594 | } | |
d45f60c6 | 1595 | nfs_pgio_data_destroy(hdr); |
dce81290 TM |
1596 | } |
1597 | ||
1598 | static enum pnfs_try_status | |
d45f60c6 | 1599 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
1600 | const struct rpc_call_ops *call_ops, |
1601 | struct pnfs_layout_segment *lseg, | |
1602 | int how) | |
0382b744 | 1603 | { |
cd841605 | 1604 | struct inode *inode = hdr->inode; |
0382b744 AA |
1605 | enum pnfs_try_status trypnfs; |
1606 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1607 | ||
cd841605 | 1608 | hdr->mds_ops = call_ops; |
0382b744 AA |
1609 | |
1610 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
1611 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
1612 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 1613 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 1614 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
1615 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1616 | return trypnfs; | |
1617 | } | |
1618 | ||
dce81290 | 1619 | static void |
7f714720 WAA |
1620 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
1621 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 1622 | { |
dce81290 TM |
1623 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
1624 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 1625 | enum pnfs_try_status trypnfs; |
dce81290 TM |
1626 | |
1627 | desc->pg_lseg = NULL; | |
d45f60c6 | 1628 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 1629 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 1630 | pnfs_write_through_mds(desc, hdr); |
9369a431 | 1631 | pnfs_put_lseg(lseg); |
dce81290 TM |
1632 | } |
1633 | ||
6c75dc0d FI |
1634 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
1635 | { | |
9369a431 | 1636 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 1637 | nfs_pgio_header_free(hdr); |
6c75dc0d | 1638 | } |
89d77c8f | 1639 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
6c75dc0d | 1640 | |
dce81290 TM |
1641 | int |
1642 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
1643 | { | |
6c75dc0d | 1644 | struct nfs_pgio_header *hdr; |
dce81290 TM |
1645 | int ret; |
1646 | ||
1e7f3a48 WAA |
1647 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
1648 | if (!hdr) { | |
9b5415b5 | 1649 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
9369a431 | 1650 | pnfs_put_lseg(desc->pg_lseg); |
dce81290 | 1651 | desc->pg_lseg = NULL; |
6c75dc0d | 1652 | return -ENOMEM; |
dce81290 | 1653 | } |
6c75dc0d | 1654 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
9369a431 | 1655 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 1656 | ret = nfs_generic_pgio(desc, hdr); |
6c75dc0d | 1657 | if (ret != 0) { |
9369a431 | 1658 | pnfs_put_lseg(desc->pg_lseg); |
6c75dc0d | 1659 | desc->pg_lseg = NULL; |
6c75dc0d | 1660 | } else |
7f714720 | 1661 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
6c75dc0d | 1662 | return ret; |
dce81290 TM |
1663 | } |
1664 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
1665 | ||
53113ad3 | 1666 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
1667 | { |
1668 | struct nfs_pageio_descriptor pgio; | |
1669 | ||
1acbbb4e | 1670 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
1671 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
1672 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 1673 | } |
e7dd79af | 1674 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 1675 | |
d45f60c6 | 1676 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1677 | { |
cd841605 FI |
1678 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
1679 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1680 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1681 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1682 | } |
4db6e0b7 | 1683 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1684 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
1685 | } |
1686 | ||
d20581aa BH |
1687 | /* |
1688 | * Called by non rpc-based layout drivers | |
1689 | */ | |
d45f60c6 | 1690 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 1691 | { |
d45f60c6 | 1692 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
cd841605 | 1693 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
1694 | __nfs4_read_done_cb(hdr); |
1695 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
62e4a769 | 1696 | } else |
d45f60c6 WAA |
1697 | pnfs_ld_handle_read_error(hdr); |
1698 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
1699 | } |
1700 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
1701 | ||
493292dd TM |
1702 | static void |
1703 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1704 | struct nfs_pgio_header *hdr) |
493292dd | 1705 | { |
4db6e0b7 FI |
1706 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
1707 | list_splice_tail_init(&hdr->pages, &desc->pg_list); | |
1708 | nfs_pageio_reset_read_mds(desc); | |
1709 | desc->pg_recoalesce = 1; | |
1710 | } | |
d45f60c6 | 1711 | nfs_pgio_data_destroy(hdr); |
493292dd TM |
1712 | } |
1713 | ||
64419a9b AA |
1714 | /* |
1715 | * Call the appropriate parallel I/O subsystem read function. | |
1716 | */ | |
493292dd | 1717 | static enum pnfs_try_status |
d45f60c6 | 1718 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
1719 | const struct rpc_call_ops *call_ops, |
1720 | struct pnfs_layout_segment *lseg) | |
64419a9b | 1721 | { |
cd841605 | 1722 | struct inode *inode = hdr->inode; |
64419a9b AA |
1723 | struct nfs_server *nfss = NFS_SERVER(inode); |
1724 | enum pnfs_try_status trypnfs; | |
1725 | ||
cd841605 | 1726 | hdr->mds_ops = call_ops; |
64419a9b AA |
1727 | |
1728 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 1729 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 1730 | |
d45f60c6 | 1731 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 1732 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 1733 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
1734 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1735 | return trypnfs; | |
1736 | } | |
863a3c6c | 1737 | |
493292dd | 1738 | static void |
7f714720 | 1739 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 1740 | { |
493292dd TM |
1741 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
1742 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 1743 | enum pnfs_try_status trypnfs; |
493292dd TM |
1744 | |
1745 | desc->pg_lseg = NULL; | |
d45f60c6 | 1746 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
7f714720 | 1747 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 1748 | pnfs_read_through_mds(desc, hdr); |
9369a431 | 1749 | pnfs_put_lseg(lseg); |
493292dd TM |
1750 | } |
1751 | ||
4db6e0b7 FI |
1752 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
1753 | { | |
9369a431 | 1754 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 1755 | nfs_pgio_header_free(hdr); |
4db6e0b7 | 1756 | } |
89d77c8f | 1757 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
4db6e0b7 | 1758 | |
493292dd TM |
1759 | int |
1760 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
1761 | { | |
4db6e0b7 | 1762 | struct nfs_pgio_header *hdr; |
493292dd TM |
1763 | int ret; |
1764 | ||
1e7f3a48 WAA |
1765 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
1766 | if (!hdr) { | |
061ae2ed | 1767 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
4db6e0b7 | 1768 | ret = -ENOMEM; |
9369a431 | 1769 | pnfs_put_lseg(desc->pg_lseg); |
493292dd TM |
1770 | desc->pg_lseg = NULL; |
1771 | return ret; | |
1772 | } | |
4db6e0b7 | 1773 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 1774 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 1775 | ret = nfs_generic_pgio(desc, hdr); |
4db6e0b7 | 1776 | if (ret != 0) { |
9369a431 | 1777 | pnfs_put_lseg(desc->pg_lseg); |
4db6e0b7 | 1778 | desc->pg_lseg = NULL; |
4db6e0b7 | 1779 | } else |
7f714720 | 1780 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 1781 | return ret; |
493292dd TM |
1782 | } |
1783 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
1784 | ||
71244d9b TM |
1785 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
1786 | { | |
1787 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
1788 | ||
1789 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 1790 | smp_mb__after_atomic(); |
71244d9b TM |
1791 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
1792 | } | |
1793 | ||
863a3c6c | 1794 | /* |
a9bae566 | 1795 | * There can be multiple RW segments. |
863a3c6c | 1796 | */ |
a9bae566 | 1797 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 1798 | { |
a9bae566 | 1799 | struct pnfs_layout_segment *lseg; |
863a3c6c | 1800 | |
a9bae566 PT |
1801 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
1802 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 1803 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
1804 | list_add(&lseg->pls_lc_list, listp); |
1805 | } | |
863a3c6c AA |
1806 | } |
1807 | ||
a073dbff TM |
1808 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
1809 | { | |
1810 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
1811 | |
1812 | /* Matched by references in pnfs_set_layoutcommit */ | |
1813 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
1814 | list_del_init(&lseg->pls_lc_list); | |
1815 | pnfs_put_lseg(lseg); | |
1816 | } | |
1817 | ||
71244d9b | 1818 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
1819 | } |
1820 | ||
1b0ae068 PT |
1821 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
1822 | { | |
b9e028fd | 1823 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
1824 | } |
1825 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
1826 | ||
863a3c6c | 1827 | void |
d45f60c6 | 1828 | pnfs_set_layoutcommit(struct nfs_pgio_header *hdr) |
863a3c6c | 1829 | { |
cd841605 FI |
1830 | struct inode *inode = hdr->inode; |
1831 | struct nfs_inode *nfsi = NFS_I(inode); | |
d45f60c6 | 1832 | loff_t end_pos = hdr->mds_offset + hdr->res.count; |
79a48a1f | 1833 | bool mark_as_dirty = false; |
863a3c6c | 1834 | |
cd841605 | 1835 | spin_lock(&inode->i_lock); |
863a3c6c | 1836 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
79a48a1f | 1837 | mark_as_dirty = true; |
863a3c6c | 1838 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 1839 | __func__, inode->i_ino); |
863a3c6c | 1840 | } |
cd841605 | 1841 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
a9bae566 | 1842 | /* references matched in nfs4_layoutcommit_release */ |
9369a431 | 1843 | pnfs_get_lseg(hdr->lseg); |
a9bae566 | 1844 | } |
acff5880 PT |
1845 | if (end_pos > nfsi->layout->plh_lwb) |
1846 | nfsi->layout->plh_lwb = end_pos; | |
cd841605 | 1847 | spin_unlock(&inode->i_lock); |
acff5880 | 1848 | dprintk("%s: lseg %p end_pos %llu\n", |
cd841605 | 1849 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
1850 | |
1851 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
1852 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
1853 | if (mark_as_dirty) | |
cd841605 | 1854 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
1855 | } |
1856 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
1857 | ||
378520b8 PT |
1858 | void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data) |
1859 | { | |
1860 | struct inode *inode = data->inode; | |
1861 | struct nfs_inode *nfsi = NFS_I(inode); | |
1862 | bool mark_as_dirty = false; | |
1863 | ||
1864 | spin_lock(&inode->i_lock); | |
1865 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { | |
1866 | mark_as_dirty = true; | |
1867 | dprintk("%s: Set layoutcommit for inode %lu ", | |
1868 | __func__, inode->i_ino); | |
1869 | } | |
1870 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &data->lseg->pls_flags)) { | |
1871 | /* references matched in nfs4_layoutcommit_release */ | |
1872 | pnfs_get_lseg(data->lseg); | |
1873 | } | |
1874 | if (data->lwb > nfsi->layout->plh_lwb) | |
1875 | nfsi->layout->plh_lwb = data->lwb; | |
1876 | spin_unlock(&inode->i_lock); | |
1877 | dprintk("%s: lseg %p end_pos %llu\n", | |
1878 | __func__, data->lseg, nfsi->layout->plh_lwb); | |
1879 | ||
1880 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
1881 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
1882 | if (mark_as_dirty) | |
1883 | mark_inode_dirty_sync(inode); | |
1884 | } | |
1885 | EXPORT_SYMBOL_GPL(pnfs_commit_set_layoutcommit); | |
1886 | ||
db29c089 AA |
1887 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
1888 | { | |
1889 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
1890 | ||
1891 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
1892 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 1893 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
1894 | } |
1895 | ||
de4b15c7 AA |
1896 | /* |
1897 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
1898 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
1899 | * data to disk to allow the server to recover the data if it crashes. | |
1900 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
1901 | * is off, and a COMMIT is sent to a data server, or | |
1902 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
1903 | */ | |
863a3c6c | 1904 | int |
ef311537 | 1905 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 1906 | { |
5f919c9f | 1907 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
1908 | struct nfs4_layoutcommit_data *data; |
1909 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 1910 | loff_t end_pos; |
71244d9b | 1911 | int status; |
863a3c6c | 1912 | |
71244d9b | 1913 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
1914 | return 0; |
1915 | ||
71244d9b | 1916 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 1917 | |
71244d9b | 1918 | status = -EAGAIN; |
92407e75 | 1919 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
1920 | if (!sync) |
1921 | goto out; | |
74316201 | 1922 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
1923 | NFS_INO_LAYOUTCOMMITTING, |
1924 | nfs_wait_bit_killable, | |
1925 | TASK_KILLABLE); | |
92407e75 | 1926 | if (status) |
71244d9b | 1927 | goto out; |
92407e75 PT |
1928 | } |
1929 | ||
71244d9b TM |
1930 | status = -ENOMEM; |
1931 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
1932 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
1933 | if (!data) | |
1934 | goto clear_layoutcommitting; | |
1935 | ||
1936 | status = 0; | |
de4b15c7 | 1937 | spin_lock(&inode->i_lock); |
71244d9b TM |
1938 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
1939 | goto out_unlock; | |
a9bae566 | 1940 | |
71244d9b | 1941 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 1942 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 1943 | |
acff5880 | 1944 | end_pos = nfsi->layout->plh_lwb; |
acff5880 | 1945 | nfsi->layout->plh_lwb = 0; |
863a3c6c | 1946 | |
f597c537 | 1947 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
1948 | spin_unlock(&inode->i_lock); |
1949 | ||
1950 | data->args.inode = inode; | |
9fa40758 | 1951 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
1952 | nfs_fattr_init(&data->fattr); |
1953 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
1954 | data->res.fattr = &data->fattr; | |
1955 | data->args.lastbytewritten = end_pos - 1; | |
1956 | data->res.server = NFS_SERVER(inode); | |
1957 | ||
5f919c9f CH |
1958 | if (ld->prepare_layoutcommit) { |
1959 | status = ld->prepare_layoutcommit(&data->args); | |
1960 | if (status) { | |
1961 | spin_lock(&inode->i_lock); | |
1962 | if (end_pos < nfsi->layout->plh_lwb) | |
1963 | nfsi->layout->plh_lwb = end_pos; | |
1964 | spin_unlock(&inode->i_lock); | |
1965 | put_rpccred(data->cred); | |
1966 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); | |
1967 | goto clear_layoutcommitting; | |
1968 | } | |
1969 | } | |
1970 | ||
1971 | ||
863a3c6c AA |
1972 | status = nfs4_proc_layoutcommit(data, sync); |
1973 | out: | |
92407e75 PT |
1974 | if (status) |
1975 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
1976 | dprintk("<-- %s status %d\n", __func__, status); |
1977 | return status; | |
71244d9b TM |
1978 | out_unlock: |
1979 | spin_unlock(&inode->i_lock); | |
92407e75 | 1980 | kfree(data); |
71244d9b TM |
1981 | clear_layoutcommitting: |
1982 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 1983 | goto out; |
863a3c6c | 1984 | } |
82be417a AA |
1985 | |
1986 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) | |
1987 | { | |
1988 | struct nfs4_threshold *thp; | |
1989 | ||
1990 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
1991 | if (!thp) { | |
1992 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
1993 | return NULL; | |
1994 | } | |
1995 | return thp; | |
1996 | } |