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" |
8733408d | 38 | #include "nfs42.h" |
85e174ba RL |
39 | |
40 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 41 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 42 | |
02c35fca FI |
43 | /* Locking: |
44 | * | |
45 | * pnfs_spinlock: | |
46 | * protects pnfs_modules_tbl. | |
47 | */ | |
48 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
49 | ||
50 | /* | |
51 | * pnfs_modules_tbl holds all pnfs modules | |
52 | */ | |
53 | static LIST_HEAD(pnfs_modules_tbl); | |
54 | ||
13c13a6a | 55 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo); |
aa1e0e3a | 56 | |
02c35fca FI |
57 | /* Return the registered pnfs layout driver module matching given id */ |
58 | static struct pnfs_layoutdriver_type * | |
59 | find_pnfs_driver_locked(u32 id) | |
60 | { | |
61 | struct pnfs_layoutdriver_type *local; | |
62 | ||
63 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
64 | if (local->id == id) | |
65 | goto out; | |
66 | local = NULL; | |
67 | out: | |
68 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
69 | return local; | |
70 | } | |
71 | ||
85e174ba RL |
72 | static struct pnfs_layoutdriver_type * |
73 | find_pnfs_driver(u32 id) | |
74 | { | |
02c35fca FI |
75 | struct pnfs_layoutdriver_type *local; |
76 | ||
77 | spin_lock(&pnfs_spinlock); | |
78 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
79 | if (local != NULL && !try_module_get(local->owner)) { |
80 | dprintk("%s: Could not grab reference on module\n", __func__); | |
81 | local = NULL; | |
82 | } | |
02c35fca FI |
83 | spin_unlock(&pnfs_spinlock); |
84 | return local; | |
85e174ba RL |
85 | } |
86 | ||
87 | void | |
88 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
89 | { | |
738fd0f3 BH |
90 | if (nfss->pnfs_curr_ld) { |
91 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
92 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
93 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
94 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
95 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 96 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 97 | } |
85e174ba RL |
98 | nfss->pnfs_curr_ld = NULL; |
99 | } | |
100 | ||
101 | /* | |
102 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
103 | * Currently only one pNFS layout driver per filesystem is supported. | |
104 | * | |
105 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
106 | */ | |
107 | void | |
738fd0f3 BH |
108 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
109 | u32 id) | |
85e174ba RL |
110 | { |
111 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
112 | ||
113 | if (id == 0) | |
114 | goto out_no_driver; | |
115 | if (!(server->nfs_client->cl_exchange_flags & | |
116 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
a030889a WAA |
117 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
118 | __func__, id, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
119 | goto out_no_driver; |
120 | } | |
121 | ld_type = find_pnfs_driver(id); | |
122 | if (!ld_type) { | |
123 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
124 | ld_type = find_pnfs_driver(id); | |
125 | if (!ld_type) { | |
126 | dprintk("%s: No pNFS module found for %u.\n", | |
127 | __func__, id); | |
128 | goto out_no_driver; | |
129 | } | |
130 | } | |
131 | server->pnfs_curr_ld = ld_type; | |
738fd0f3 BH |
132 | if (ld_type->set_layoutdriver |
133 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
134 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
135 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
136 | module_put(ld_type->owner); |
137 | goto out_no_driver; | |
138 | } | |
2a4c8994 TM |
139 | /* Bump the MDS count */ |
140 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 141 | |
85e174ba RL |
142 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
143 | return; | |
144 | ||
145 | out_no_driver: | |
146 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
147 | server->pnfs_curr_ld = NULL; | |
148 | } | |
02c35fca FI |
149 | |
150 | int | |
151 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
152 | { | |
153 | int status = -EINVAL; | |
154 | struct pnfs_layoutdriver_type *tmp; | |
155 | ||
156 | if (ld_type->id == 0) { | |
a030889a | 157 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
158 | return status; |
159 | } | |
b1f69b75 | 160 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 161 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
162 | "alloc_lseg and free_lseg.\n", __func__); |
163 | return status; | |
164 | } | |
02c35fca FI |
165 | |
166 | spin_lock(&pnfs_spinlock); | |
167 | tmp = find_pnfs_driver_locked(ld_type->id); | |
168 | if (!tmp) { | |
169 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
170 | status = 0; | |
171 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
172 | ld_type->name); | |
173 | } else { | |
a030889a | 174 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
175 | __func__, ld_type->id); |
176 | } | |
177 | spin_unlock(&pnfs_spinlock); | |
178 | ||
179 | return status; | |
180 | } | |
181 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
182 | ||
183 | void | |
184 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
185 | { | |
186 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
187 | spin_lock(&pnfs_spinlock); | |
188 | list_del(&ld_type->pnfs_tblid); | |
189 | spin_unlock(&pnfs_spinlock); | |
190 | } | |
191 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 192 | |
b1f69b75 AA |
193 | /* |
194 | * pNFS client layout cache | |
195 | */ | |
196 | ||
cc6e5340 | 197 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 198 | void |
70c3bd2b | 199 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 200 | { |
cc6e5340 | 201 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
202 | } |
203 | ||
636fb9c8 BH |
204 | static struct pnfs_layout_hdr * |
205 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
206 | { | |
207 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 208 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
209 | } |
210 | ||
211 | static void | |
212 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
213 | { | |
9c626381 TM |
214 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
215 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
216 | ||
217 | if (!list_empty(&lo->plh_layouts)) { | |
218 | struct nfs_client *clp = server->nfs_client; | |
219 | ||
220 | spin_lock(&clp->cl_lock); | |
221 | list_del_init(&lo->plh_layouts); | |
222 | spin_unlock(&clp->cl_lock); | |
223 | } | |
9fa40758 | 224 | put_rpccred(lo->plh_lc_cred); |
57934278 | 225 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
226 | } |
227 | ||
e5e94017 | 228 | static void |
6622c3ea | 229 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 230 | { |
bb346f63 | 231 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 232 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
233 | nfsi->layout = NULL; |
234 | /* Reset MDS Threshold I/O counters */ | |
235 | nfsi->write_io = 0; | |
236 | nfsi->read_io = 0; | |
e5e94017 BH |
237 | } |
238 | ||
b1f69b75 | 239 | void |
70c3bd2b | 240 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 241 | { |
cc6e5340 FI |
242 | struct inode *inode = lo->plh_inode; |
243 | ||
13c13a6a TM |
244 | pnfs_layoutreturn_before_put_layout_hdr(lo); |
245 | ||
cc6e5340 | 246 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
566f8737 PT |
247 | if (!list_empty(&lo->plh_segs)) |
248 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 249 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 250 | spin_unlock(&inode->i_lock); |
6622c3ea | 251 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 252 | } |
974cec8c AA |
253 | } |
254 | ||
2454dfea TM |
255 | /* |
256 | * Mark a pnfs_layout_hdr and all associated layout segments as invalid | |
257 | * | |
258 | * In order to continue using the pnfs_layout_hdr, a full recovery | |
259 | * is required. | |
260 | * Note that caller must hold inode->i_lock. | |
261 | */ | |
9fd4b9fc | 262 | static int |
2454dfea TM |
263 | pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, |
264 | struct list_head *lseg_list) | |
265 | { | |
266 | struct pnfs_layout_range range = { | |
267 | .iomode = IOMODE_ANY, | |
268 | .offset = 0, | |
269 | .length = NFS4_MAX_UINT64, | |
270 | }; | |
271 | ||
272 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
9fd4b9fc | 273 | return pnfs_mark_matching_lsegs_invalid(lo, lseg_list, &range); |
2454dfea TM |
274 | } |
275 | ||
b9e028fd TM |
276 | static int |
277 | pnfs_iomode_to_fail_bit(u32 iomode) | |
278 | { | |
279 | return iomode == IOMODE_RW ? | |
280 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
281 | } | |
282 | ||
283 | static void | |
3e621214 | 284 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 285 | { |
25c75333 | 286 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 287 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
288 | atomic_inc(&lo->plh_refcount); |
289 | } | |
290 | ||
291 | static void | |
292 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
293 | { | |
294 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
295 | atomic_dec(&lo->plh_refcount); | |
296 | } | |
297 | ||
298 | static void | |
299 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
300 | { | |
301 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
302 | struct pnfs_layout_range range = { |
303 | .iomode = iomode, | |
304 | .offset = 0, | |
305 | .length = NFS4_MAX_UINT64, | |
306 | }; | |
307 | LIST_HEAD(head); | |
3e621214 TM |
308 | |
309 | spin_lock(&inode->i_lock); | |
310 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 311 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 312 | spin_unlock(&inode->i_lock); |
115ce575 | 313 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
314 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
315 | iomode == IOMODE_RW ? "RW" : "READ"); | |
316 | } | |
317 | ||
318 | static bool | |
319 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
320 | { | |
25c75333 | 321 | unsigned long start, end; |
3e621214 TM |
322 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
323 | ||
324 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
325 | return false; |
326 | end = jiffies; | |
327 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
328 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
329 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 330 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
331 | return false; |
332 | } | |
333 | return true; | |
b9e028fd TM |
334 | } |
335 | ||
974cec8c AA |
336 | static void |
337 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
338 | { | |
566052c5 | 339 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 340 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
341 | atomic_set(&lseg->pls_refcount, 1); |
342 | smp_mb(); | |
343 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 344 | lseg->pls_layout = lo; |
974cec8c AA |
345 | } |
346 | ||
905ca191 | 347 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 348 | { |
b7edfaa1 | 349 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 350 | |
b1f69b75 | 351 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
352 | } |
353 | ||
d684d2ae | 354 | static void |
57036a37 TM |
355 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
356 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 357 | { |
57036a37 | 358 | struct inode *inode = lo->plh_inode; |
d684d2ae | 359 | |
d20581aa | 360 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 361 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
362 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
363 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
364 | if (list_empty(&lo->plh_segs)) |
365 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
366 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
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)); | |
4ef2e4f8 | 381 | |
57036a37 TM |
382 | lo = lseg->pls_layout; |
383 | inode = lo->plh_inode; | |
4ef2e4f8 | 384 | |
d684d2ae | 385 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
faa4a54f TM |
386 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
387 | spin_unlock(&inode->i_lock); | |
388 | return; | |
389 | } | |
8f0d27dc | 390 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 TM |
391 | pnfs_layout_remove_lseg(lo, lseg); |
392 | spin_unlock(&inode->i_lock); | |
393 | pnfs_free_lseg(lseg); | |
394 | pnfs_put_layout_hdr(lo); | |
4541d16c | 395 | } |
4541d16c | 396 | } |
9369a431 | 397 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 398 | |
6543f803 | 399 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
400 | { |
401 | struct pnfs_layout_segment *lseg; | |
6543f803 | 402 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
403 | |
404 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 405 | lo = lseg->pls_layout; |
e6cf82d1 | 406 | |
6543f803 TM |
407 | pnfs_free_lseg(lseg); |
408 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
409 | } |
410 | ||
6543f803 | 411 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 412 | { |
6543f803 | 413 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
414 | schedule_work(&lseg->pls_work); |
415 | } | |
6543f803 TM |
416 | |
417 | void | |
418 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
419 | { | |
420 | if (!lseg) | |
421 | return; | |
422 | ||
423 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
424 | ||
425 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
426 | atomic_read(&lseg->pls_refcount), | |
427 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
428 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
429 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
faa4a54f TM |
430 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) |
431 | return; | |
6543f803 TM |
432 | pnfs_get_layout_hdr(lo); |
433 | pnfs_layout_remove_lseg(lo, lseg); | |
434 | pnfs_free_lseg_async(lseg); | |
435 | } | |
436 | } | |
437 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 438 | |
3cb2df17 | 439 | static u64 |
fb3296eb BH |
440 | end_offset(u64 start, u64 len) |
441 | { | |
442 | u64 end; | |
443 | ||
444 | end = start + len; | |
445 | return end >= start ? end : NFS4_MAX_UINT64; | |
446 | } | |
447 | ||
fb3296eb BH |
448 | /* |
449 | * is l2 fully contained in l1? | |
450 | * start1 end1 | |
451 | * [----------------------------------) | |
452 | * start2 end2 | |
453 | * [----------------) | |
454 | */ | |
3cb2df17 | 455 | static bool |
7dc0ac70 | 456 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 457 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
458 | { |
459 | u64 start1 = l1->offset; | |
460 | u64 end1 = end_offset(start1, l1->length); | |
461 | u64 start2 = l2->offset; | |
462 | u64 end2 = end_offset(start2, l2->length); | |
463 | ||
464 | return (start1 <= start2) && (end1 >= end2); | |
465 | } | |
466 | ||
467 | /* | |
468 | * is l1 and l2 intersecting? | |
469 | * start1 end1 | |
470 | * [----------------------------------) | |
471 | * start2 end2 | |
472 | * [----------------) | |
473 | */ | |
3cb2df17 | 474 | static bool |
7dc0ac70 | 475 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 476 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
477 | { |
478 | u64 start1 = l1->offset; | |
479 | u64 end1 = end_offset(start1, l1->length); | |
480 | u64 start2 = l2->offset; | |
481 | u64 end2 = end_offset(start2, l2->length); | |
482 | ||
483 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
484 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
485 | } | |
486 | ||
4541d16c | 487 | static bool |
3cb2df17 TM |
488 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
489 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 490 | { |
778b5502 BH |
491 | return (recall_range->iomode == IOMODE_ANY || |
492 | lseg_range->iomode == recall_range->iomode) && | |
7dc0ac70 | 493 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
974cec8c AA |
494 | } |
495 | ||
24956804 TM |
496 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
497 | struct list_head *tmp_list) | |
498 | { | |
499 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
500 | return false; | |
501 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
502 | list_add(&lseg->pls_list, tmp_list); | |
503 | return true; | |
504 | } | |
505 | ||
4541d16c FI |
506 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
507 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
508 | struct list_head *tmp_list) | |
509 | { | |
510 | int rv = 0; | |
511 | ||
512 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
513 | /* Remove the reference keeping the lseg in the | |
514 | * list. It will now be removed when all | |
515 | * outstanding io is finished. | |
516 | */ | |
d684d2ae FI |
517 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
518 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 519 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 520 | rv = 1; |
4541d16c FI |
521 | } |
522 | return rv; | |
523 | } | |
524 | ||
525 | /* Returns count of number of matching invalid lsegs remaining in list | |
526 | * after call. | |
527 | */ | |
43f1b3da | 528 | int |
49a85061 | 529 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 530 | struct list_head *tmp_list, |
506c0d68 | 531 | const struct pnfs_layout_range *recall_range) |
974cec8c AA |
532 | { |
533 | struct pnfs_layout_segment *lseg, *next; | |
71b39854 | 534 | int remaining = 0; |
974cec8c AA |
535 | |
536 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
537 | ||
8006bfba | 538 | if (list_empty(&lo->plh_segs)) |
38511722 | 539 | return 0; |
4541d16c | 540 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
541 | if (!recall_range || |
542 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
543 | dprintk("%s: freeing lseg %p iomode %d " |
544 | "offset %llu length %llu\n", __func__, | |
545 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
546 | lseg->pls_range.length); | |
71b39854 TM |
547 | if (!mark_lseg_invalid(lseg, tmp_list)) |
548 | remaining++; | |
4541d16c | 549 | } |
71b39854 TM |
550 | dprintk("%s:Return %i\n", __func__, remaining); |
551 | return remaining; | |
974cec8c AA |
552 | } |
553 | ||
f49f9baa | 554 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 555 | void |
4541d16c | 556 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 557 | { |
4541d16c | 558 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
559 | |
560 | if (list_empty(free_me)) | |
561 | return; | |
562 | ||
4541d16c | 563 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 564 | list_del(&lseg->pls_list); |
905ca191 | 565 | pnfs_free_lseg(lseg); |
974cec8c AA |
566 | } |
567 | } | |
568 | ||
e5e94017 BH |
569 | void |
570 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
571 | { | |
572 | struct pnfs_layout_hdr *lo; | |
974cec8c | 573 | LIST_HEAD(tmp_list); |
e5e94017 BH |
574 | |
575 | spin_lock(&nfsi->vfs_inode.i_lock); | |
576 | lo = nfsi->layout; | |
577 | if (lo) { | |
3e621214 | 578 | pnfs_get_layout_hdr(lo); |
2454dfea | 579 | pnfs_mark_layout_stateid_invalid(lo, &tmp_list); |
3e621214 TM |
580 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
581 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
582 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
583 | pnfs_free_lseg_list(&tmp_list); | |
584 | pnfs_put_layout_hdr(lo); | |
585 | } else | |
586 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 587 | } |
041245c8 | 588 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 589 | |
fd9a8d71 TM |
590 | static bool |
591 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
592 | struct list_head *layout_list) | |
974cec8c AA |
593 | { |
594 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 595 | bool ret = false; |
974cec8c | 596 | |
fd9a8d71 TM |
597 | spin_lock(&inode->i_lock); |
598 | lo = NFS_I(inode)->layout; | |
599 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
600 | pnfs_get_layout_hdr(lo); | |
601 | list_add(&lo->plh_bulk_destroy, layout_list); | |
602 | ret = true; | |
603 | } | |
604 | spin_unlock(&inode->i_lock); | |
605 | return ret; | |
606 | } | |
607 | ||
608 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
609 | static int | |
610 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
611 | struct nfs_server *server, | |
612 | struct list_head *layout_list) | |
613 | { | |
614 | struct pnfs_layout_hdr *lo, *next; | |
615 | struct inode *inode; | |
616 | ||
617 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
618 | inode = igrab(lo->plh_inode); | |
619 | if (inode == NULL) | |
620 | continue; | |
621 | list_del_init(&lo->plh_layouts); | |
622 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
623 | continue; | |
624 | rcu_read_unlock(); | |
625 | spin_unlock(&clp->cl_lock); | |
626 | iput(inode); | |
627 | spin_lock(&clp->cl_lock); | |
628 | rcu_read_lock(); | |
629 | return -EAGAIN; | |
630 | } | |
631 | return 0; | |
632 | } | |
633 | ||
634 | static int | |
635 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
636 | bool is_bulk_recall) | |
637 | { | |
638 | struct pnfs_layout_hdr *lo; | |
639 | struct inode *inode; | |
fd9a8d71 TM |
640 | LIST_HEAD(lseg_list); |
641 | int ret = 0; | |
642 | ||
643 | while (!list_empty(layout_list)) { | |
644 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
645 | plh_bulk_destroy); | |
646 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
647 | lo->plh_inode->i_ino); | |
648 | inode = lo->plh_inode; | |
7c5d1875 CH |
649 | |
650 | pnfs_layoutcommit_inode(inode, false); | |
651 | ||
fd9a8d71 TM |
652 | spin_lock(&inode->i_lock); |
653 | list_del_init(&lo->plh_bulk_destroy); | |
9fd4b9fc TM |
654 | if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) { |
655 | if (is_bulk_recall) | |
656 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
fd9a8d71 | 657 | ret = -EAGAIN; |
9fd4b9fc | 658 | } |
fd9a8d71 TM |
659 | spin_unlock(&inode->i_lock); |
660 | pnfs_free_lseg_list(&lseg_list); | |
b20135d0 TM |
661 | /* Free all lsegs that are attached to commit buckets */ |
662 | nfs_commit_inode(inode, 0); | |
fd9a8d71 TM |
663 | pnfs_put_layout_hdr(lo); |
664 | iput(inode); | |
665 | } | |
666 | return ret; | |
667 | } | |
668 | ||
669 | int | |
670 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
671 | struct nfs_fsid *fsid, | |
672 | bool is_recall) | |
673 | { | |
674 | struct nfs_server *server; | |
675 | LIST_HEAD(layout_list); | |
c47abcf8 | 676 | |
974cec8c | 677 | spin_lock(&clp->cl_lock); |
6382a441 | 678 | rcu_read_lock(); |
fd9a8d71 | 679 | restart: |
6382a441 | 680 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
681 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
682 | continue; | |
683 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
684 | server, | |
685 | &layout_list) != 0) | |
686 | goto restart; | |
6382a441 WAA |
687 | } |
688 | rcu_read_unlock(); | |
974cec8c AA |
689 | spin_unlock(&clp->cl_lock); |
690 | ||
fd9a8d71 TM |
691 | if (list_empty(&layout_list)) |
692 | return 0; | |
693 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
694 | } | |
695 | ||
696 | int | |
697 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
698 | bool is_recall) | |
699 | { | |
700 | struct nfs_server *server; | |
701 | LIST_HEAD(layout_list); | |
702 | ||
703 | spin_lock(&clp->cl_lock); | |
704 | rcu_read_lock(); | |
705 | restart: | |
706 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
707 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
708 | server, | |
709 | &layout_list) != 0) | |
710 | goto restart; | |
974cec8c | 711 | } |
fd9a8d71 TM |
712 | rcu_read_unlock(); |
713 | spin_unlock(&clp->cl_lock); | |
714 | ||
715 | if (list_empty(&layout_list)) | |
716 | return 0; | |
717 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
718 | } | |
719 | ||
720 | /* | |
721 | * Called by the state manger to remove all layouts established under an | |
722 | * expired lease. | |
723 | */ | |
724 | void | |
725 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
726 | { | |
727 | nfs4_deviceid_mark_client_invalid(clp); | |
728 | nfs4_deviceid_purge_client(clp); | |
729 | ||
730 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
731 | } |
732 | ||
5a65503f TM |
733 | /* |
734 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
735 | * taking into account wraparound issues. | |
736 | */ | |
737 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
738 | { | |
2c64c57d | 739 | return (s32)(s1 - s2) > 0; |
5a65503f TM |
740 | } |
741 | ||
fd6002e9 | 742 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
743 | void |
744 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
745 | bool update_barrier) | |
b1f69b75 | 746 | { |
22aaf714 TM |
747 | u32 oldseq, newseq, new_barrier; |
748 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 749 | |
2d2f24ad TM |
750 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
751 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 752 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 753 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 754 | if (update_barrier) { |
22aaf714 | 755 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
756 | } else { |
757 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 758 | * "close" to the current seqids. |
43f1b3da | 759 | */ |
22aaf714 | 760 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 761 | } |
22aaf714 TM |
762 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
763 | lo->plh_barrier = new_barrier; | |
43f1b3da | 764 | } |
b1f69b75 AA |
765 | } |
766 | ||
cf7d63f1 | 767 | static bool |
19c54aba TM |
768 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
769 | const nfs4_stateid *stateid) | |
43f1b3da | 770 | { |
19c54aba | 771 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 772 | |
19c54aba TM |
773 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
774 | } | |
775 | ||
776 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
777 | static bool | |
e1c06f80 | 778 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo) |
19c54aba | 779 | { |
f7e8917a | 780 | return lo->plh_block_lgets || |
e1c06f80 | 781 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
cf7d63f1 FI |
782 | } |
783 | ||
fd6002e9 FI |
784 | int |
785 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
506c0d68 | 786 | const struct pnfs_layout_range *range, |
fd6002e9 | 787 | struct nfs4_state *open_state) |
b1f69b75 | 788 | { |
fd6002e9 | 789 | int status = 0; |
974cec8c | 790 | |
b1f69b75 | 791 | dprintk("--> %s\n", __func__); |
fd6002e9 | 792 | spin_lock(&lo->plh_inode->i_lock); |
e1c06f80 | 793 | if (pnfs_layoutgets_blocked(lo)) { |
cf7d63f1 | 794 | status = -EAGAIN; |
5d422301 TM |
795 | } else if (!nfs4_valid_open_stateid(open_state)) { |
796 | status = -EBADF; | |
47abadef CH |
797 | } else if (list_empty(&lo->plh_segs) || |
798 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { | |
fd6002e9 FI |
799 | int seq; |
800 | ||
801 | do { | |
802 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 803 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
804 | } while (read_seqretry(&open_state->seqlock, seq)); |
805 | } else | |
f597c537 | 806 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 807 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 808 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 809 | return status; |
b1f69b75 AA |
810 | } |
811 | ||
812 | /* | |
813 | * Get layout from server. | |
814 | * for now, assume that whole file layouts are requested. | |
815 | * arg->offset: 0 | |
816 | * arg->length: all ones | |
817 | */ | |
e5e94017 BH |
818 | static struct pnfs_layout_segment * |
819 | send_layoutget(struct pnfs_layout_hdr *lo, | |
820 | struct nfs_open_context *ctx, | |
e144e539 | 821 | const struct pnfs_layout_range *range, |
a75b9df9 | 822 | gfp_t gfp_flags) |
e5e94017 | 823 | { |
b7edfaa1 | 824 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
825 | struct nfs_server *server = NFS_SERVER(ino); |
826 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 827 | struct pnfs_layout_segment *lseg; |
2d89a1d3 | 828 | loff_t i_size; |
b1f69b75 AA |
829 | |
830 | dprintk("--> %s\n", __func__); | |
e5e94017 | 831 | |
4f2e9dce JL |
832 | /* |
833 | * Synchronously retrieve layout information from server and | |
834 | * store in lseg. If we race with a concurrent seqid morphing | |
835 | * op, then re-send the LAYOUTGET. | |
836 | */ | |
837 | do { | |
838 | lgp = kzalloc(sizeof(*lgp), gfp_flags); | |
839 | if (lgp == NULL) | |
840 | return NULL; | |
841 | ||
842 | i_size = i_size_read(ino); | |
843 | ||
844 | lgp->args.minlength = PAGE_CACHE_SIZE; | |
845 | if (lgp->args.minlength > range->length) | |
846 | lgp->args.minlength = range->length; | |
847 | if (range->iomode == IOMODE_READ) { | |
848 | if (range->offset >= i_size) | |
849 | lgp->args.minlength = 0; | |
850 | else if (i_size - range->offset < lgp->args.minlength) | |
851 | lgp->args.minlength = i_size - range->offset; | |
852 | } | |
853 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; | |
e144e539 | 854 | pnfs_copy_range(&lgp->args.range, range); |
4f2e9dce JL |
855 | lgp->args.type = server->pnfs_curr_ld->id; |
856 | lgp->args.inode = ino; | |
857 | lgp->args.ctx = get_nfs_open_context(ctx); | |
858 | lgp->gfp_flags = gfp_flags; | |
859 | lgp->cred = lo->plh_lc_cred; | |
35124a09 | 860 | |
4f2e9dce JL |
861 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
862 | } while (lseg == ERR_PTR(-EAGAIN)); | |
2d89a1d3 | 863 | |
0bcbf039 PT |
864 | if (IS_ERR(lseg) && !nfs_error_is_fatal(PTR_ERR(lseg))) |
865 | lseg = NULL; | |
866 | else | |
d67ae825 TH |
867 | pnfs_layout_clear_fail_bit(lo, |
868 | pnfs_iomode_to_fail_bit(range->iomode)); | |
35124a09 | 869 | |
974cec8c AA |
870 | return lseg; |
871 | } | |
872 | ||
24956804 TM |
873 | static void pnfs_clear_layoutcommit(struct inode *inode, |
874 | struct list_head *head) | |
875 | { | |
876 | struct nfs_inode *nfsi = NFS_I(inode); | |
877 | struct pnfs_layout_segment *lseg, *tmp; | |
878 | ||
879 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
880 | return; | |
881 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
882 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
883 | continue; | |
884 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
885 | } | |
886 | } | |
887 | ||
d67ae825 TH |
888 | void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
889 | { | |
890 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
891 | smp_mb__after_atomic(); | |
892 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
7f27392c | 893 | rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); |
d67ae825 TH |
894 | } |
895 | ||
13c13a6a TM |
896 | static bool |
897 | pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo) | |
898 | { | |
899 | if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
900 | return false; | |
901 | lo->plh_return_iomode = 0; | |
902 | pnfs_get_layout_hdr(lo); | |
2370abda | 903 | clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); |
13c13a6a TM |
904 | return true; |
905 | } | |
906 | ||
f40eb5d0 | 907 | static int |
ed429d6b | 908 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid, |
6c16605d | 909 | enum pnfs_iomode iomode, bool sync) |
f40eb5d0 PT |
910 | { |
911 | struct inode *ino = lo->plh_inode; | |
912 | struct nfs4_layoutreturn *lrp; | |
913 | int status = 0; | |
914 | ||
e4af440a | 915 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
916 | if (unlikely(lrp == NULL)) { |
917 | status = -ENOMEM; | |
918 | spin_lock(&ino->i_lock); | |
d67ae825 | 919 | pnfs_clear_layoutreturn_waitbit(lo); |
f40eb5d0 PT |
920 | spin_unlock(&ino->i_lock); |
921 | pnfs_put_layout_hdr(lo); | |
922 | goto out; | |
923 | } | |
924 | ||
ed429d6b | 925 | nfs4_stateid_copy(&lrp->args.stateid, stateid); |
f40eb5d0 PT |
926 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
927 | lrp->args.inode = ino; | |
15eb67c1 PT |
928 | lrp->args.range.iomode = iomode; |
929 | lrp->args.range.offset = 0; | |
930 | lrp->args.range.length = NFS4_MAX_UINT64; | |
f40eb5d0 PT |
931 | lrp->args.layout = lo; |
932 | lrp->clp = NFS_SERVER(ino)->nfs_client; | |
933 | lrp->cred = lo->plh_lc_cred; | |
934 | ||
6c16605d | 935 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
936 | out: |
937 | dprintk("<-- %s status: %d\n", __func__, status); | |
938 | return status; | |
939 | } | |
940 | ||
13c13a6a TM |
941 | /* Return true if layoutreturn is needed */ |
942 | static bool | |
943 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo) | |
944 | { | |
945 | struct pnfs_layout_segment *s; | |
946 | ||
2370abda | 947 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
948 | return false; |
949 | ||
950 | /* Defer layoutreturn until all lsegs are done */ | |
951 | list_for_each_entry(s, &lo->plh_segs, pls_list) { | |
952 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) | |
953 | return false; | |
954 | } | |
955 | ||
956 | return true; | |
957 | } | |
958 | ||
959 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo) | |
960 | { | |
961 | struct inode *inode= lo->plh_inode; | |
962 | ||
2370abda | 963 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
964 | return; |
965 | spin_lock(&inode->i_lock); | |
966 | if (pnfs_layout_need_return(lo)) { | |
967 | nfs4_stateid stateid; | |
968 | enum pnfs_iomode iomode; | |
969 | bool send; | |
970 | ||
971 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); | |
972 | iomode = lo->plh_return_iomode; | |
973 | send = pnfs_prepare_layoutreturn(lo); | |
974 | spin_unlock(&inode->i_lock); | |
975 | if (send) { | |
976 | /* Send an async layoutreturn so we dont deadlock */ | |
977 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
978 | } | |
979 | } else | |
980 | spin_unlock(&inode->i_lock); | |
981 | } | |
982 | ||
293b3b06 AA |
983 | /* |
984 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
985 | * when the layout segment list is empty. | |
986 | * | |
987 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
988 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
989 | * deviceid is marked invalid. | |
990 | */ | |
cbe82603 BH |
991 | int |
992 | _pnfs_return_layout(struct inode *ino) | |
993 | { | |
994 | struct pnfs_layout_hdr *lo = NULL; | |
995 | struct nfs_inode *nfsi = NFS_I(ino); | |
996 | LIST_HEAD(tmp_list); | |
cbe82603 | 997 | nfs4_stateid stateid; |
293b3b06 | 998 | int status = 0, empty; |
7f27392c | 999 | bool send; |
cbe82603 | 1000 | |
366d5052 | 1001 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
1002 | |
1003 | spin_lock(&ino->i_lock); | |
1004 | lo = nfsi->layout; | |
e5929f3c | 1005 | if (!lo) { |
cbe82603 | 1006 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
1007 | dprintk("NFS: %s no layout to return\n", __func__); |
1008 | goto out; | |
cbe82603 | 1009 | } |
50f563ef | 1010 | nfs4_stateid_copy(&stateid, &nfsi->layout->plh_stateid); |
cbe82603 | 1011 | /* Reference matched in nfs4_layoutreturn_release */ |
70c3bd2b | 1012 | pnfs_get_layout_hdr(lo); |
293b3b06 | 1013 | empty = list_empty(&lo->plh_segs); |
24956804 | 1014 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 1015 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
c88953d8 CH |
1016 | |
1017 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
1018 | struct pnfs_layout_range range = { | |
1019 | .iomode = IOMODE_ANY, | |
1020 | .offset = 0, | |
1021 | .length = NFS4_MAX_UINT64, | |
1022 | }; | |
1023 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1024 | } | |
1025 | ||
293b3b06 AA |
1026 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
1027 | if (empty) { | |
1028 | spin_unlock(&ino->i_lock); | |
293b3b06 | 1029 | dprintk("NFS: %s no layout segments to return\n", __func__); |
7f27392c | 1030 | goto out_put_layout_hdr; |
293b3b06 | 1031 | } |
47abadef CH |
1032 | |
1033 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
7f27392c | 1034 | send = pnfs_prepare_layoutreturn(lo); |
cbe82603 BH |
1035 | spin_unlock(&ino->i_lock); |
1036 | pnfs_free_lseg_list(&tmp_list); | |
7f27392c | 1037 | if (send) |
ed429d6b | 1038 | status = pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
7f27392c TM |
1039 | out_put_layout_hdr: |
1040 | pnfs_put_layout_hdr(lo); | |
cbe82603 BH |
1041 | out: |
1042 | dprintk("<-- %s status: %d\n", __func__, status); | |
1043 | return status; | |
1044 | } | |
0a57cdac | 1045 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 1046 | |
24028672 TM |
1047 | int |
1048 | pnfs_commit_and_return_layout(struct inode *inode) | |
1049 | { | |
1050 | struct pnfs_layout_hdr *lo; | |
1051 | int ret; | |
1052 | ||
1053 | spin_lock(&inode->i_lock); | |
1054 | lo = NFS_I(inode)->layout; | |
1055 | if (lo == NULL) { | |
1056 | spin_unlock(&inode->i_lock); | |
1057 | return 0; | |
1058 | } | |
1059 | pnfs_get_layout_hdr(lo); | |
1060 | /* Block new layoutgets and read/write to ds */ | |
1061 | lo->plh_block_lgets++; | |
1062 | spin_unlock(&inode->i_lock); | |
1063 | filemap_fdatawait(inode->i_mapping); | |
1064 | ret = pnfs_layoutcommit_inode(inode, true); | |
1065 | if (ret == 0) | |
1066 | ret = _pnfs_return_layout(inode); | |
1067 | spin_lock(&inode->i_lock); | |
1068 | lo->plh_block_lgets--; | |
1069 | spin_unlock(&inode->i_lock); | |
1070 | pnfs_put_layout_hdr(lo); | |
1071 | return ret; | |
1072 | } | |
1073 | ||
f7e8917a FI |
1074 | bool pnfs_roc(struct inode *ino) |
1075 | { | |
40dd4b7a TM |
1076 | struct nfs_inode *nfsi = NFS_I(ino); |
1077 | struct nfs_open_context *ctx; | |
1078 | struct nfs4_state *state; | |
f7e8917a FI |
1079 | struct pnfs_layout_hdr *lo; |
1080 | struct pnfs_layout_segment *lseg, *tmp; | |
193e3aa2 | 1081 | nfs4_stateid stateid; |
f7e8917a | 1082 | LIST_HEAD(tmp_list); |
e755d638 | 1083 | bool found = false, layoutreturn = false, roc = false; |
f7e8917a FI |
1084 | |
1085 | spin_lock(&ino->i_lock); | |
40dd4b7a | 1086 | lo = nfsi->layout; |
3976143b | 1087 | if (!lo || test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
40dd4b7a TM |
1088 | goto out_noroc; |
1089 | ||
e755d638 | 1090 | /* no roc if we hold a delegation */ |
40dd4b7a TM |
1091 | if (nfs4_check_delegation(ino, FMODE_READ)) |
1092 | goto out_noroc; | |
1093 | ||
1094 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1095 | state = ctx->state; | |
1096 | /* Don't return layout if there is open file state */ | |
1097 | if (state != NULL && state->state != 0) | |
1098 | goto out_noroc; | |
1099 | } | |
1100 | ||
50f563ef | 1101 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
e755d638 | 1102 | /* always send layoutreturn if being marked so */ |
2370abda | 1103 | if (test_and_clear_bit(NFS_LAYOUT_RETURN_REQUESTED, |
e755d638 PT |
1104 | &lo->plh_flags)) |
1105 | layoutreturn = pnfs_prepare_layoutreturn(lo); | |
1106 | ||
f7e8917a | 1107 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
e755d638 PT |
1108 | /* If we are sending layoutreturn, invalidate all valid lsegs */ |
1109 | if (layoutreturn || test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
f7e8917a FI |
1110 | mark_lseg_invalid(lseg, &tmp_list); |
1111 | found = true; | |
1112 | } | |
500d701f | 1113 | /* ROC in two conditions: |
e755d638 PT |
1114 | * 1. there are ROC lsegs |
1115 | * 2. we don't send layoutreturn | |
e755d638 | 1116 | */ |
500d701f PT |
1117 | if (found && !layoutreturn) { |
1118 | /* lo ref dropped in pnfs_roc_release() */ | |
1119 | pnfs_get_layout_hdr(lo); | |
e755d638 | 1120 | roc = true; |
500d701f | 1121 | } |
f7e8917a | 1122 | |
40dd4b7a | 1123 | out_noroc: |
f7e8917a | 1124 | spin_unlock(&ino->i_lock); |
e755d638 PT |
1125 | pnfs_free_lseg_list(&tmp_list); |
1126 | pnfs_layoutcommit_inode(ino, true); | |
1127 | if (layoutreturn) | |
ed429d6b | 1128 | pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
e755d638 | 1129 | return roc; |
f7e8917a FI |
1130 | } |
1131 | ||
1132 | void pnfs_roc_release(struct inode *ino) | |
1133 | { | |
1134 | struct pnfs_layout_hdr *lo; | |
1135 | ||
1136 | spin_lock(&ino->i_lock); | |
1137 | lo = NFS_I(ino)->layout; | |
5c4a79fb | 1138 | pnfs_clear_layoutreturn_waitbit(lo); |
6622c3ea TM |
1139 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1140 | pnfs_detach_layout_hdr(lo); | |
1141 | spin_unlock(&ino->i_lock); | |
1142 | pnfs_free_layout_hdr(lo); | |
1143 | } else | |
1144 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1145 | } |
1146 | ||
1147 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1148 | { | |
1149 | struct pnfs_layout_hdr *lo; | |
1150 | ||
1151 | spin_lock(&ino->i_lock); | |
1152 | lo = NFS_I(ino)->layout; | |
0654cc72 | 1153 | pnfs_mark_layout_returned_if_empty(lo); |
0f35ad6f | 1154 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1155 | lo->plh_barrier = barrier; |
1156 | spin_unlock(&ino->i_lock); | |
6a463beb | 1157 | trace_nfs4_layoutreturn_on_close(ino, 0); |
f7e8917a FI |
1158 | } |
1159 | ||
4ff376fe | 1160 | void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier) |
f7e8917a FI |
1161 | { |
1162 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1163 | struct pnfs_layout_hdr *lo; |
7fdab069 | 1164 | u32 current_seqid; |
f7e8917a FI |
1165 | |
1166 | spin_lock(&ino->i_lock); | |
7fdab069 TM |
1167 | lo = nfsi->layout; |
1168 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1169 | |
7fdab069 TM |
1170 | /* Since close does not return a layout stateid for use as |
1171 | * a barrier, we choose the worst-case barrier. | |
1172 | */ | |
1173 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
f7e8917a | 1174 | spin_unlock(&ino->i_lock); |
f7e8917a FI |
1175 | } |
1176 | ||
500d701f PT |
1177 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
1178 | { | |
1179 | struct nfs_inode *nfsi = NFS_I(ino); | |
1180 | struct pnfs_layout_hdr *lo; | |
1181 | bool sleep = false; | |
1182 | ||
1183 | /* we might not have grabbed lo reference. so need to check under | |
1184 | * i_lock */ | |
1185 | spin_lock(&ino->i_lock); | |
1186 | lo = nfsi->layout; | |
1187 | if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
1188 | sleep = true; | |
1189 | spin_unlock(&ino->i_lock); | |
1190 | ||
1191 | if (sleep) | |
1192 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
1193 | ||
1194 | return sleep; | |
1195 | } | |
1196 | ||
b1f69b75 AA |
1197 | /* |
1198 | * Compare two layout segments for sorting into layout cache. | |
1199 | * We want to preferentially return RW over RO layouts, so ensure those | |
1200 | * are seen first. | |
1201 | */ | |
1202 | static s64 | |
7dc0ac70 | 1203 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1204 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1205 | { |
fb3296eb BH |
1206 | s64 d; |
1207 | ||
1208 | /* high offset > low offset */ | |
1209 | d = l1->offset - l2->offset; | |
1210 | if (d) | |
1211 | return d; | |
1212 | ||
1213 | /* short length > long length */ | |
1214 | d = l2->length - l1->length; | |
1215 | if (d) | |
1216 | return d; | |
1217 | ||
b1f69b75 | 1218 | /* read > read/write */ |
fb3296eb | 1219 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1220 | } |
1221 | ||
03772d2f TM |
1222 | static bool |
1223 | pnfs_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
1224 | const struct pnfs_layout_range *l2) | |
1225 | { | |
1226 | return pnfs_lseg_range_cmp(l1, l2) > 0; | |
1227 | } | |
1228 | ||
1229 | static bool | |
1230 | pnfs_lseg_no_merge(struct pnfs_layout_segment *lseg, | |
1231 | struct pnfs_layout_segment *old) | |
1232 | { | |
1233 | return false; | |
1234 | } | |
1235 | ||
1236 | void | |
1237 | pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1238 | struct pnfs_layout_segment *lseg, | |
1239 | bool (*is_after)(const struct pnfs_layout_range *, | |
1240 | const struct pnfs_layout_range *), | |
1241 | bool (*do_merge)(struct pnfs_layout_segment *, | |
1242 | struct pnfs_layout_segment *), | |
1243 | struct list_head *free_me) | |
974cec8c | 1244 | { |
03772d2f | 1245 | struct pnfs_layout_segment *lp, *tmp; |
b1f69b75 | 1246 | |
974cec8c AA |
1247 | dprintk("%s:Begin\n", __func__); |
1248 | ||
03772d2f TM |
1249 | list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) { |
1250 | if (test_bit(NFS_LSEG_VALID, &lp->pls_flags) == 0) | |
1251 | continue; | |
1252 | if (do_merge(lseg, lp)) { | |
1253 | mark_lseg_invalid(lp, free_me); | |
1254 | continue; | |
1255 | } | |
1256 | if (is_after(&lseg->pls_range, &lp->pls_range)) | |
b1f69b75 | 1257 | continue; |
566052c5 | 1258 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1259 | dprintk("%s: inserted lseg %p " |
1260 | "iomode %d offset %llu length %llu before " | |
1261 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1262 | __func__, lseg, lseg->pls_range.iomode, |
1263 | lseg->pls_range.offset, lseg->pls_range.length, | |
1264 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1265 | lp->pls_range.length); | |
fb3296eb | 1266 | goto out; |
974cec8c | 1267 | } |
fb3296eb BH |
1268 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1269 | dprintk("%s: inserted lseg %p " | |
1270 | "iomode %d offset %llu length %llu at tail\n", | |
1271 | __func__, lseg, lseg->pls_range.iomode, | |
1272 | lseg->pls_range.offset, lseg->pls_range.length); | |
1273 | out: | |
70c3bd2b | 1274 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1275 | |
1276 | dprintk("%s:Return\n", __func__); | |
e5e94017 | 1277 | } |
03772d2f TM |
1278 | EXPORT_SYMBOL_GPL(pnfs_generic_layout_insert_lseg); |
1279 | ||
1280 | static void | |
1281 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1282 | struct pnfs_layout_segment *lseg, | |
1283 | struct list_head *free_me) | |
1284 | { | |
1285 | struct inode *inode = lo->plh_inode; | |
1286 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
1287 | ||
1288 | if (ld->add_lseg != NULL) | |
1289 | ld->add_lseg(lo, lseg, free_me); | |
1290 | else | |
1291 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
1292 | pnfs_lseg_range_is_after, | |
1293 | pnfs_lseg_no_merge, | |
1294 | free_me); | |
1295 | } | |
e5e94017 BH |
1296 | |
1297 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1298 | alloc_init_layout_hdr(struct inode *ino, |
1299 | struct nfs_open_context *ctx, | |
1300 | gfp_t gfp_flags) | |
e5e94017 BH |
1301 | { |
1302 | struct pnfs_layout_hdr *lo; | |
1303 | ||
636fb9c8 | 1304 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1305 | if (!lo) |
1306 | return NULL; | |
cc6e5340 | 1307 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1308 | INIT_LIST_HEAD(&lo->plh_layouts); |
1309 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1310 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1311 | lo->plh_inode = ino; |
5cc2216d | 1312 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1313 | return lo; |
1314 | } | |
1315 | ||
1316 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1317 | pnfs_find_alloc_layout(struct inode *ino, |
1318 | struct nfs_open_context *ctx, | |
1319 | gfp_t gfp_flags) | |
e5e94017 BH |
1320 | { |
1321 | struct nfs_inode *nfsi = NFS_I(ino); | |
1322 | struct pnfs_layout_hdr *new = NULL; | |
1323 | ||
1324 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1325 | ||
251ec410 TM |
1326 | if (nfsi->layout != NULL) |
1327 | goto out_existing; | |
e5e94017 | 1328 | spin_unlock(&ino->i_lock); |
9fa40758 | 1329 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1330 | spin_lock(&ino->i_lock); |
1331 | ||
251ec410 | 1332 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1333 | nfsi->layout = new; |
251ec410 | 1334 | return new; |
7175fe90 YN |
1335 | } else if (new != NULL) |
1336 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1337 | out_existing: |
1338 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1339 | return nfsi->layout; |
1340 | } | |
1341 | ||
b1f69b75 AA |
1342 | /* |
1343 | * iomode matching rules: | |
1344 | * iomode lseg match | |
1345 | * ----- ----- ----- | |
1346 | * ANY READ true | |
1347 | * ANY RW true | |
1348 | * RW READ false | |
1349 | * RW RW true | |
1350 | * READ READ true | |
1351 | * READ RW true | |
1352 | */ | |
3cb2df17 | 1353 | static bool |
7dc0ac70 | 1354 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
3cb2df17 | 1355 | const struct pnfs_layout_range *range) |
b1f69b75 | 1356 | { |
fb3296eb BH |
1357 | struct pnfs_layout_range range1; |
1358 | ||
1359 | if ((range->iomode == IOMODE_RW && | |
1360 | ls_range->iomode != IOMODE_RW) || | |
7dc0ac70 | 1361 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1362 | return 0; |
1363 | ||
1364 | /* range1 covers only the first byte in the range */ | |
1365 | range1 = *range; | |
1366 | range1.length = 1; | |
7dc0ac70 | 1367 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1368 | } |
1369 | ||
1370 | /* | |
1371 | * lookup range in layout | |
1372 | */ | |
e5e94017 | 1373 | static struct pnfs_layout_segment * |
fb3296eb BH |
1374 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1375 | struct pnfs_layout_range *range) | |
e5e94017 | 1376 | { |
b1f69b75 AA |
1377 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1378 | ||
1379 | dprintk("%s:Begin\n", __func__); | |
1380 | ||
b7edfaa1 | 1381 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1382 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1383 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
7dc0ac70 | 1384 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
9369a431 | 1385 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1386 | break; |
1387 | } | |
b1f69b75 AA |
1388 | } |
1389 | ||
1390 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1391 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1392 | return ret; |
e5e94017 BH |
1393 | } |
1394 | ||
d23d61c8 AA |
1395 | /* |
1396 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1397 | * to the MDS or over pNFS | |
1398 | * | |
1399 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1400 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1401 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1402 | * WRITE request. | |
1403 | * | |
1404 | * A return of true means use MDS I/O. | |
1405 | * | |
1406 | * From rfc 5661: | |
1407 | * If a file's size is smaller than the file size threshold, data accesses | |
1408 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1409 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1410 | * server. If both file size and I/O size are provided, the client SHOULD | |
1411 | * reach or exceed both thresholds before sending its read or write | |
1412 | * requests to the data server. | |
1413 | */ | |
1414 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1415 | struct inode *ino, int iomode) | |
1416 | { | |
1417 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1418 | struct nfs_inode *nfsi = NFS_I(ino); | |
1419 | loff_t fsize = i_size_read(ino); | |
1420 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1421 | ||
1422 | if (t == NULL) | |
1423 | return ret; | |
1424 | ||
1425 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1426 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1427 | ||
1428 | switch (iomode) { | |
1429 | case IOMODE_READ: | |
1430 | if (t->bm & THRESHOLD_RD) { | |
1431 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1432 | size_set = true; | |
1433 | if (fsize < t->rd_sz) | |
1434 | size = true; | |
1435 | } | |
1436 | if (t->bm & THRESHOLD_RD_IO) { | |
1437 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1438 | nfsi->read_io); | |
1439 | io_set = true; | |
1440 | if (nfsi->read_io < t->rd_io_sz) | |
1441 | io = true; | |
1442 | } | |
1443 | break; | |
1444 | case IOMODE_RW: | |
1445 | if (t->bm & THRESHOLD_WR) { | |
1446 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1447 | size_set = true; | |
1448 | if (fsize < t->wr_sz) | |
1449 | size = true; | |
1450 | } | |
1451 | if (t->bm & THRESHOLD_WR_IO) { | |
1452 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1453 | nfsi->write_io); | |
1454 | io_set = true; | |
1455 | if (nfsi->write_io < t->wr_io_sz) | |
1456 | io = true; | |
1457 | } | |
1458 | break; | |
1459 | } | |
1460 | if (size_set && io_set) { | |
1461 | if (size && io) | |
1462 | ret = true; | |
1463 | } else if (size || io) | |
1464 | ret = true; | |
1465 | ||
1466 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1467 | return ret; | |
1468 | } | |
1469 | ||
aa8a45ee PT |
1470 | static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) |
1471 | { | |
1472 | /* | |
1473 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1474 | * reference | |
1475 | */ | |
1476 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
1477 | return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
2e5b29f0 | 1478 | nfs_wait_bit_killable, |
aa8a45ee PT |
1479 | TASK_UNINTERRUPTIBLE); |
1480 | } | |
1481 | ||
d67ae825 TH |
1482 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1483 | { | |
1484 | unsigned long *bitlock = &lo->plh_flags; | |
1485 | ||
1486 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1487 | smp_mb__after_atomic(); | |
1488 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1489 | } | |
1490 | ||
e5e94017 BH |
1491 | /* |
1492 | * Layout segment is retreived from the server if not cached. | |
1493 | * The appropriate layout segment is referenced and returned to the caller. | |
1494 | */ | |
7c24d948 | 1495 | struct pnfs_layout_segment * |
e5e94017 BH |
1496 | pnfs_update_layout(struct inode *ino, |
1497 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1498 | loff_t pos, |
1499 | u64 count, | |
a75b9df9 TM |
1500 | enum pnfs_iomode iomode, |
1501 | gfp_t gfp_flags) | |
e5e94017 | 1502 | { |
fb3296eb BH |
1503 | struct pnfs_layout_range arg = { |
1504 | .iomode = iomode, | |
1505 | .offset = pos, | |
1506 | .length = count, | |
1507 | }; | |
707ed5fd | 1508 | unsigned pg_offset; |
6382a441 WAA |
1509 | struct nfs_server *server = NFS_SERVER(ino); |
1510 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1511 | struct pnfs_layout_hdr *lo; |
1512 | struct pnfs_layout_segment *lseg = NULL; | |
30005121 | 1513 | bool first; |
e5e94017 | 1514 | |
9a4bf31d | 1515 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) { |
f4848303 | 1516 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1517 | PNFS_UPDATE_LAYOUT_NO_PNFS); |
f86bbcf8 | 1518 | goto out; |
9a4bf31d | 1519 | } |
d23d61c8 | 1520 | |
9a4bf31d | 1521 | if (iomode == IOMODE_READ && i_size_read(ino) == 0) { |
f4848303 | 1522 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1523 | PNFS_UPDATE_LAYOUT_RD_ZEROLEN); |
4ae93560 | 1524 | goto out; |
9a4bf31d | 1525 | } |
4ae93560 | 1526 | |
9a4bf31d | 1527 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { |
f4848303 | 1528 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1529 | PNFS_UPDATE_LAYOUT_MDSTHRESH); |
f86bbcf8 | 1530 | goto out; |
9a4bf31d | 1531 | } |
d23d61c8 | 1532 | |
9bf87482 PT |
1533 | lookup_again: |
1534 | first = false; | |
e5e94017 | 1535 | spin_lock(&ino->i_lock); |
9fa40758 | 1536 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1537 | if (lo == NULL) { |
1538 | spin_unlock(&ino->i_lock); | |
f4848303 | 1539 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1540 | PNFS_UPDATE_LAYOUT_NOMEM); |
830ffb56 TM |
1541 | goto out; |
1542 | } | |
e5e94017 | 1543 | |
43f1b3da | 1544 | /* Do we even need to bother with this? */ |
a59c30ac | 1545 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
f4848303 | 1546 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1547 | PNFS_UPDATE_LAYOUT_BULK_RECALL); |
43f1b3da | 1548 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1549 | goto out_unlock; |
1550 | } | |
1551 | ||
1552 | /* if LAYOUTGET already failed once we don't try again */ | |
2e5b29f0 | 1553 | if (pnfs_layout_io_test_failed(lo, iomode)) { |
f4848303 | 1554 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1555 | PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); |
e5e94017 | 1556 | goto out_unlock; |
9a4bf31d | 1557 | } |
e5e94017 | 1558 | |
9bf87482 PT |
1559 | first = list_empty(&lo->plh_segs); |
1560 | if (first) { | |
1561 | /* The first layoutget for the file. Need to serialize per | |
1562 | * RFC 5661 Errata 3208. | |
1563 | */ | |
1564 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1565 | &lo->plh_flags)) { | |
1566 | spin_unlock(&ino->i_lock); | |
1567 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1568 | TASK_UNINTERRUPTIBLE); | |
1569 | pnfs_put_layout_hdr(lo); | |
1570 | goto lookup_again; | |
1571 | } | |
1572 | } else { | |
1573 | /* Check to see if the layout for the given range | |
1574 | * already exists | |
1575 | */ | |
1576 | lseg = pnfs_find_lseg(lo, &arg); | |
9a4bf31d | 1577 | if (lseg) { |
f4848303 | 1578 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1579 | PNFS_UPDATE_LAYOUT_FOUND_CACHED); |
9bf87482 | 1580 | goto out_unlock; |
9a4bf31d | 1581 | } |
9bf87482 | 1582 | } |
568e8c49 | 1583 | |
aa8a45ee PT |
1584 | /* |
1585 | * Because we free lsegs before sending LAYOUTRETURN, we need to wait | |
1586 | * for LAYOUTRETURN even if first is true. | |
1587 | */ | |
8f70f53a | 1588 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
aa8a45ee PT |
1589 | spin_unlock(&ino->i_lock); |
1590 | dprintk("%s wait for layoutreturn\n", __func__); | |
1591 | if (pnfs_prepare_to_retry_layoutget(lo)) { | |
d67ae825 TH |
1592 | if (first) |
1593 | pnfs_clear_first_layoutget(lo); | |
aa8a45ee PT |
1594 | pnfs_put_layout_hdr(lo); |
1595 | dprintk("%s retrying\n", __func__); | |
1596 | goto lookup_again; | |
1597 | } | |
f4848303 | 1598 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1599 | PNFS_UPDATE_LAYOUT_RETURN); |
aa8a45ee PT |
1600 | goto out_put_layout_hdr; |
1601 | } | |
1602 | ||
9a4bf31d | 1603 | if (pnfs_layoutgets_blocked(lo)) { |
f4848303 | 1604 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1605 | PNFS_UPDATE_LAYOUT_BLOCKED); |
cf7d63f1 | 1606 | goto out_unlock; |
9a4bf31d | 1607 | } |
cf7d63f1 | 1608 | atomic_inc(&lo->plh_outstanding); |
f49f9baa | 1609 | spin_unlock(&ino->i_lock); |
30005121 | 1610 | |
abb9a007 | 1611 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1612 | /* The lo must be on the clp list if there is any |
1613 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1614 | */ | |
1615 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1616 | if (list_empty(&lo->plh_layouts)) |
1617 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1618 | spin_unlock(&clp->cl_lock); |
1619 | } | |
e5e94017 | 1620 | |
707ed5fd BH |
1621 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1622 | if (pg_offset) { | |
1623 | arg.offset -= pg_offset; | |
1624 | arg.length += pg_offset; | |
1625 | } | |
7c24d948 AA |
1626 | if (arg.length != NFS4_MAX_UINT64) |
1627 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1628 | |
fb3296eb | 1629 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
cf7d63f1 | 1630 | atomic_dec(&lo->plh_outstanding); |
f4848303 | 1631 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1632 | PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); |
830ffb56 | 1633 | out_put_layout_hdr: |
d67ae825 TH |
1634 | if (first) |
1635 | pnfs_clear_first_layoutget(lo); | |
70c3bd2b | 1636 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1637 | out: |
f86bbcf8 TM |
1638 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1639 | "(%s, offset: %llu, length: %llu)\n", | |
1640 | __func__, ino->i_sb->s_id, | |
1641 | (unsigned long long)NFS_FILEID(ino), | |
d600ad1f | 1642 | IS_ERR_OR_NULL(lseg) ? "not found" : "found", |
f86bbcf8 TM |
1643 | iomode==IOMODE_RW ? "read/write" : "read-only", |
1644 | (unsigned long long)pos, | |
1645 | (unsigned long long)count); | |
e5e94017 BH |
1646 | return lseg; |
1647 | out_unlock: | |
1648 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1649 | goto out_put_layout_hdr; |
e5e94017 | 1650 | } |
7c24d948 | 1651 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1652 | |
540d9864 TM |
1653 | static bool |
1654 | pnfs_sanity_check_layout_range(struct pnfs_layout_range *range) | |
1655 | { | |
1656 | switch (range->iomode) { | |
1657 | case IOMODE_READ: | |
1658 | case IOMODE_RW: | |
1659 | break; | |
1660 | default: | |
1661 | return false; | |
1662 | } | |
1663 | if (range->offset == NFS4_MAX_UINT64) | |
1664 | return false; | |
1665 | if (range->length == 0) | |
1666 | return false; | |
1667 | if (range->length != NFS4_MAX_UINT64 && | |
1668 | range->length > NFS4_MAX_UINT64 - range->offset) | |
1669 | return false; | |
1670 | return true; | |
1671 | } | |
1672 | ||
a0b0a6e3 | 1673 | struct pnfs_layout_segment * |
b1f69b75 AA |
1674 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1675 | { | |
1676 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1677 | struct nfs4_layoutget_res *res = &lgp->res; | |
1678 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1679 | struct inode *ino = lo->plh_inode; |
78096cca | 1680 | LIST_HEAD(free_me); |
540d9864 TM |
1681 | int status = -EINVAL; |
1682 | ||
1683 | if (!pnfs_sanity_check_layout_range(&res->range)) | |
1684 | goto out; | |
b1f69b75 AA |
1685 | |
1686 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1687 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1688 | if (!lseg || IS_ERR(lseg)) { |
1689 | if (!lseg) | |
1690 | status = -ENOMEM; | |
1691 | else | |
1692 | status = PTR_ERR(lseg); | |
1693 | dprintk("%s: Could not allocate layout: error %d\n", | |
1694 | __func__, status); | |
1695 | goto out; | |
1696 | } | |
1697 | ||
1013df61 CH |
1698 | init_lseg(lo, lseg); |
1699 | lseg->pls_range = res->range; | |
1700 | ||
b1f69b75 | 1701 | spin_lock(&ino->i_lock); |
e1c06f80 | 1702 | if (pnfs_layoutgets_blocked(lo)) { |
43f1b3da FI |
1703 | dprintk("%s forget reply due to state\n", __func__); |
1704 | goto out_forget_reply; | |
1705 | } | |
038d6493 | 1706 | |
362f7474 CH |
1707 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1708 | /* existing state ID, make sure the sequence number matches. */ | |
1709 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1710 | dprintk("%s forget reply due to sequence\n", __func__); | |
4f2e9dce | 1711 | status = -EAGAIN; |
362f7474 CH |
1712 | goto out_forget_reply; |
1713 | } | |
1714 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1715 | } else { | |
1716 | /* | |
1717 | * We got an entirely new state ID. Mark all segments for the | |
1718 | * inode invalid, and don't bother validating the stateid | |
1719 | * sequence number. | |
1720 | */ | |
1721 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); | |
1722 | ||
1723 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1724 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1725 | } | |
038d6493 | 1726 | |
47abadef CH |
1727 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
1728 | ||
9369a431 | 1729 | pnfs_get_lseg(lseg); |
03772d2f | 1730 | pnfs_layout_insert_lseg(lo, lseg, &free_me); |
b1f69b75 | 1731 | |
3976143b | 1732 | if (res->return_on_close) |
f7e8917a | 1733 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
f7e8917a | 1734 | |
b1f69b75 | 1735 | spin_unlock(&ino->i_lock); |
78096cca | 1736 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1737 | return lseg; |
b1f69b75 | 1738 | out: |
a0b0a6e3 | 1739 | return ERR_PTR(status); |
43f1b3da FI |
1740 | |
1741 | out_forget_reply: | |
1742 | spin_unlock(&ino->i_lock); | |
1743 | lseg->pls_layout = lo; | |
1744 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1745 | goto out; | |
b1f69b75 AA |
1746 | } |
1747 | ||
016256df | 1748 | static void |
5c97f5de TM |
1749 | pnfs_set_plh_return_iomode(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode) |
1750 | { | |
1751 | if (lo->plh_return_iomode == iomode) | |
1752 | return; | |
1753 | if (lo->plh_return_iomode != 0) | |
1754 | iomode = IOMODE_ANY; | |
1755 | lo->plh_return_iomode = iomode; | |
e0fa0d01 | 1756 | set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); |
5c97f5de TM |
1757 | } |
1758 | ||
2f215968 TM |
1759 | /** |
1760 | * pnfs_mark_matching_lsegs_return - Free or return matching layout segments | |
1761 | * @lo: pointer to layout header | |
1762 | * @tmp_list: list header to be used with pnfs_free_lseg_list() | |
1763 | * @return_range: describe layout segment ranges to be returned | |
1764 | * | |
1765 | * This function is mainly intended for use by layoutrecall. It attempts | |
1766 | * to free the layout segment immediately, or else to mark it for return | |
1767 | * as soon as its reference count drops to zero. | |
1768 | */ | |
10335556 | 1769 | int |
016256df PT |
1770 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
1771 | struct list_head *tmp_list, | |
506c0d68 | 1772 | const struct pnfs_layout_range *return_range) |
016256df PT |
1773 | { |
1774 | struct pnfs_layout_segment *lseg, *next; | |
10335556 | 1775 | int remaining = 0; |
016256df PT |
1776 | |
1777 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
1778 | ||
1779 | if (list_empty(&lo->plh_segs)) | |
10335556 | 1780 | return 0; |
016256df | 1781 | |
fc7ff367 | 1782 | assert_spin_locked(&lo->plh_inode->i_lock); |
016256df PT |
1783 | |
1784 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
1785 | if (should_free_lseg(&lseg->pls_range, return_range)) { | |
1786 | dprintk("%s: marking lseg %p iomode %d " | |
1787 | "offset %llu length %llu\n", __func__, | |
1788 | lseg, lseg->pls_range.iomode, | |
1789 | lseg->pls_range.offset, | |
1790 | lseg->pls_range.length); | |
2f215968 TM |
1791 | if (mark_lseg_invalid(lseg, tmp_list)) |
1792 | continue; | |
1793 | remaining++; | |
016256df | 1794 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); |
5c97f5de | 1795 | pnfs_set_plh_return_iomode(lo, return_range->iomode); |
016256df | 1796 | } |
10335556 | 1797 | return remaining; |
016256df PT |
1798 | } |
1799 | ||
1800 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
1801 | struct pnfs_layout_segment *lseg) | |
1802 | { | |
1803 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
016256df PT |
1804 | struct pnfs_layout_range range = { |
1805 | .iomode = lseg->pls_range.iomode, | |
1806 | .offset = 0, | |
1807 | .length = NFS4_MAX_UINT64, | |
1808 | }; | |
1809 | LIST_HEAD(free_me); | |
10335556 | 1810 | bool return_now = false; |
016256df PT |
1811 | |
1812 | spin_lock(&inode->i_lock); | |
5c97f5de | 1813 | pnfs_set_plh_return_iomode(lo, range.iomode); |
016256df PT |
1814 | /* |
1815 | * mark all matching lsegs so that we are sure to have no live | |
1816 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
1817 | * for how it works. | |
1818 | */ | |
10335556 TM |
1819 | if (!pnfs_mark_matching_lsegs_return(lo, &free_me, &range)) { |
1820 | nfs4_stateid stateid; | |
1821 | enum pnfs_iomode iomode = lo->plh_return_iomode; | |
1822 | ||
1823 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); | |
1824 | return_now = pnfs_prepare_layoutreturn(lo); | |
1825 | spin_unlock(&inode->i_lock); | |
1826 | if (return_now) | |
1827 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
1828 | } else { | |
1829 | spin_unlock(&inode->i_lock); | |
1830 | nfs_commit_inode(inode, 0); | |
1831 | } | |
016256df PT |
1832 | pnfs_free_lseg_list(&free_me); |
1833 | } | |
1834 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
1835 | ||
d8007d4d TM |
1836 | void |
1837 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1838 | { | |
1fd937bd PT |
1839 | u64 rd_size = req->wb_bytes; |
1840 | ||
cb5d04bc PT |
1841 | if (pgio->pg_lseg == NULL) { |
1842 | if (pgio->pg_dreq == NULL) | |
1843 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1844 | else | |
1845 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1846 | ||
1847 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1848 | req->wb_context, | |
1849 | req_offset(req), | |
1850 | rd_size, | |
1851 | IOMODE_READ, | |
1852 | GFP_KERNEL); | |
d600ad1f PT |
1853 | if (IS_ERR(pgio->pg_lseg)) { |
1854 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1855 | pgio->pg_lseg = NULL; | |
1856 | return; | |
1857 | } | |
cb5d04bc | 1858 | } |
e885de1a TM |
1859 | /* If no lseg, fall back to read through mds */ |
1860 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1861 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1862 | |
d8007d4d TM |
1863 | } |
1864 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1865 | ||
1866 | void | |
6296556f PT |
1867 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1868 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1869 | { |
d600ad1f | 1870 | if (pgio->pg_lseg == NULL) { |
cb5d04bc PT |
1871 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1872 | req->wb_context, | |
1873 | req_offset(req), | |
1874 | wb_size, | |
1875 | IOMODE_RW, | |
1876 | GFP_NOFS); | |
d600ad1f PT |
1877 | if (IS_ERR(pgio->pg_lseg)) { |
1878 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1879 | pgio->pg_lseg = NULL; | |
1880 | return; | |
1881 | } | |
1882 | } | |
e885de1a TM |
1883 | /* If no lseg, fall back to write through mds */ |
1884 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1885 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1886 | } |
1887 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1888 | ||
180bb5ec WAA |
1889 | void |
1890 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
1891 | { | |
1892 | if (desc->pg_lseg) { | |
1893 | pnfs_put_lseg(desc->pg_lseg); | |
1894 | desc->pg_lseg = NULL; | |
1895 | } | |
1896 | } | |
1897 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
1898 | ||
b4fdac1a WAA |
1899 | /* |
1900 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1901 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1902 | */ | |
1903 | size_t | |
a7d42ddb WAA |
1904 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
1905 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 1906 | { |
0f9c429e | 1907 | unsigned int size; |
c5e20cb7 | 1908 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1909 | |
1910 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1911 | if (!size) |
1912 | return 0; | |
94ad1c80 | 1913 | |
19982ba8 | 1914 | /* |
c5e20cb7 WAA |
1915 | * 'size' contains the number of bytes left in the current page (up |
1916 | * to the original size asked for in @req->wb_bytes). | |
1917 | * | |
1918 | * Calculate how many bytes are left in the layout segment | |
1919 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1920 | * |
1921 | * Please also note that 'end_offset' is actually the offset of the | |
1922 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1923 | * | |
1924 | */ | |
19b54848 | 1925 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
1926 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
1927 | pgio->pg_lseg->pls_range.length); | |
1928 | req_start = req_offset(req); | |
7c13789e | 1929 | WARN_ON_ONCE(req_start >= seg_end); |
c5e20cb7 | 1930 | /* start of request is past the last byte of this segment */ |
7c13789e WAA |
1931 | if (req_start >= seg_end) { |
1932 | /* reference the new lseg */ | |
1933 | if (pgio->pg_ops->pg_cleanup) | |
1934 | pgio->pg_ops->pg_cleanup(pgio); | |
1935 | if (pgio->pg_ops->pg_init) | |
1936 | pgio->pg_ops->pg_init(pgio, req); | |
19b54848 | 1937 | return 0; |
7c13789e | 1938 | } |
c5e20cb7 WAA |
1939 | |
1940 | /* adjust 'size' iff there are fewer bytes left in the | |
1941 | * segment than what nfs_generic_pg_test returned */ | |
1942 | seg_left = seg_end - req_start; | |
1943 | if (seg_left < size) | |
1944 | size = (unsigned int)seg_left; | |
19b54848 | 1945 | } |
0f9c429e | 1946 | |
19b54848 | 1947 | return size; |
94ad1c80 | 1948 | } |
89a58e32 | 1949 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1950 | |
53113ad3 | 1951 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
1952 | { |
1953 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
1954 | |
1955 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
1956 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
1957 | hdr->completion_ops); | |
c7070113 | 1958 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 1959 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 1960 | } |
e7dd79af | 1961 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1962 | |
d45f60c6 | 1963 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1964 | { |
cd841605 FI |
1965 | |
1966 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1967 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1968 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1969 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1970 | } |
6c75dc0d | 1971 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1972 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
1973 | } |
1974 | ||
d20581aa BH |
1975 | /* |
1976 | * Called by non rpc-based layout drivers | |
1977 | */ | |
d45f60c6 | 1978 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 1979 | { |
f8417b48 | 1980 | if (likely(!hdr->pnfs_error)) { |
67af7611 TM |
1981 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
1982 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 1983 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
1984 | } |
1985 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); | |
1986 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
1987 | pnfs_ld_handle_write_error(hdr); |
1988 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 1989 | } |
d20581aa | 1990 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1991 | |
dce81290 TM |
1992 | static void |
1993 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1994 | struct nfs_pgio_header *hdr) |
dce81290 | 1995 | { |
48d635f1 | 1996 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1997 | |
6c75dc0d | 1998 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1999 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 2000 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 2001 | mirror->pg_recoalesce = 1; |
6c75dc0d | 2002 | } |
d45f60c6 | 2003 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2004 | hdr->release(hdr); |
dce81290 TM |
2005 | } |
2006 | ||
2007 | static enum pnfs_try_status | |
d45f60c6 | 2008 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
2009 | const struct rpc_call_ops *call_ops, |
2010 | struct pnfs_layout_segment *lseg, | |
2011 | int how) | |
0382b744 | 2012 | { |
cd841605 | 2013 | struct inode *inode = hdr->inode; |
0382b744 AA |
2014 | enum pnfs_try_status trypnfs; |
2015 | struct nfs_server *nfss = NFS_SERVER(inode); | |
2016 | ||
cd841605 | 2017 | hdr->mds_ops = call_ops; |
0382b744 AA |
2018 | |
2019 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
2020 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
2021 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 2022 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 2023 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
2024 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2025 | return trypnfs; | |
2026 | } | |
2027 | ||
dce81290 | 2028 | static void |
7f714720 WAA |
2029 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
2030 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 2031 | { |
dce81290 TM |
2032 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2033 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2034 | enum pnfs_try_status trypnfs; |
dce81290 | 2035 | |
d45f60c6 | 2036 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 2037 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 2038 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
2039 | } |
2040 | ||
6c75dc0d FI |
2041 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
2042 | { | |
9369a431 | 2043 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2044 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
2045 | } |
2046 | ||
dce81290 TM |
2047 | int |
2048 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
2049 | { | |
6c75dc0d | 2050 | struct nfs_pgio_header *hdr; |
dce81290 TM |
2051 | int ret; |
2052 | ||
1e7f3a48 WAA |
2053 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2054 | if (!hdr) { | |
2bff2288 PT |
2055 | desc->pg_error = -ENOMEM; |
2056 | return desc->pg_error; | |
dce81290 | 2057 | } |
6c75dc0d | 2058 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 2059 | |
9369a431 | 2060 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2061 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2062 | if (!ret) |
7f714720 | 2063 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 2064 | |
6c75dc0d | 2065 | return ret; |
dce81290 TM |
2066 | } |
2067 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
2068 | ||
53113ad3 | 2069 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
2070 | { |
2071 | struct nfs_pageio_descriptor pgio; | |
2072 | ||
1acbbb4e | 2073 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
2074 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
2075 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 2076 | } |
e7dd79af | 2077 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 2078 | |
d45f60c6 | 2079 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2080 | { |
cd841605 FI |
2081 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
2082 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2083 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2084 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2085 | } |
4db6e0b7 | 2086 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2087 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
2088 | } |
2089 | ||
d20581aa BH |
2090 | /* |
2091 | * Called by non rpc-based layout drivers | |
2092 | */ | |
d45f60c6 | 2093 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 2094 | { |
cd841605 | 2095 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
2096 | __nfs4_read_done_cb(hdr); |
2097 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
f8417b48 KM |
2098 | } |
2099 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); | |
2100 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2101 | pnfs_ld_handle_read_error(hdr); |
2102 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
2103 | } |
2104 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
2105 | ||
493292dd TM |
2106 | static void |
2107 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2108 | struct nfs_pgio_header *hdr) |
493292dd | 2109 | { |
48d635f1 | 2110 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2111 | |
4db6e0b7 | 2112 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2113 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 2114 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 2115 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 2116 | } |
d45f60c6 | 2117 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2118 | hdr->release(hdr); |
493292dd TM |
2119 | } |
2120 | ||
64419a9b AA |
2121 | /* |
2122 | * Call the appropriate parallel I/O subsystem read function. | |
2123 | */ | |
493292dd | 2124 | static enum pnfs_try_status |
d45f60c6 | 2125 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2126 | const struct rpc_call_ops *call_ops, |
2127 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2128 | { |
cd841605 | 2129 | struct inode *inode = hdr->inode; |
64419a9b AA |
2130 | struct nfs_server *nfss = NFS_SERVER(inode); |
2131 | enum pnfs_try_status trypnfs; | |
2132 | ||
cd841605 | 2133 | hdr->mds_ops = call_ops; |
64419a9b AA |
2134 | |
2135 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2136 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2137 | |
d45f60c6 | 2138 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2139 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2140 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2141 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2142 | return trypnfs; | |
2143 | } | |
863a3c6c | 2144 | |
ceb11e13 PT |
2145 | /* Resend all requests through pnfs. */ |
2146 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) | |
2147 | { | |
2148 | struct nfs_pageio_descriptor pgio; | |
2149 | ||
2150 | nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); | |
2151 | return nfs_pageio_resend(&pgio, hdr); | |
2152 | } | |
2153 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2154 | ||
493292dd | 2155 | static void |
7f714720 | 2156 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2157 | { |
493292dd TM |
2158 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2159 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2160 | enum pnfs_try_status trypnfs; |
ceb11e13 | 2161 | int err = 0; |
493292dd | 2162 | |
d45f60c6 | 2163 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 PT |
2164 | if (trypnfs == PNFS_TRY_AGAIN) |
2165 | err = pnfs_read_resend_pnfs(hdr); | |
2166 | if (trypnfs == PNFS_NOT_ATTEMPTED || err) | |
d45f60c6 | 2167 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
2168 | } |
2169 | ||
4db6e0b7 FI |
2170 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
2171 | { | |
9369a431 | 2172 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2173 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
2174 | } |
2175 | ||
493292dd TM |
2176 | int |
2177 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
2178 | { | |
4db6e0b7 | 2179 | struct nfs_pgio_header *hdr; |
493292dd TM |
2180 | int ret; |
2181 | ||
1e7f3a48 WAA |
2182 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2183 | if (!hdr) { | |
2bff2288 PT |
2184 | desc->pg_error = -ENOMEM; |
2185 | return desc->pg_error; | |
493292dd | 2186 | } |
4db6e0b7 | 2187 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 2188 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2189 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2190 | if (!ret) |
7f714720 | 2191 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 2192 | return ret; |
493292dd TM |
2193 | } |
2194 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
2195 | ||
71244d9b TM |
2196 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
2197 | { | |
2198 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
2199 | ||
2200 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 2201 | smp_mb__after_atomic(); |
71244d9b TM |
2202 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
2203 | } | |
2204 | ||
863a3c6c | 2205 | /* |
a9bae566 | 2206 | * There can be multiple RW segments. |
863a3c6c | 2207 | */ |
a9bae566 | 2208 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 2209 | { |
a9bae566 | 2210 | struct pnfs_layout_segment *lseg; |
863a3c6c | 2211 | |
a9bae566 PT |
2212 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
2213 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 2214 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
2215 | list_add(&lseg->pls_lc_list, listp); |
2216 | } | |
863a3c6c AA |
2217 | } |
2218 | ||
a073dbff TM |
2219 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
2220 | { | |
2221 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
2222 | |
2223 | /* Matched by references in pnfs_set_layoutcommit */ | |
2224 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
2225 | list_del_init(&lseg->pls_lc_list); | |
2226 | pnfs_put_lseg(lseg); | |
2227 | } | |
2228 | ||
71244d9b | 2229 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
2230 | } |
2231 | ||
1b0ae068 PT |
2232 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
2233 | { | |
b9e028fd | 2234 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
2235 | } |
2236 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
2237 | ||
863a3c6c | 2238 | void |
67af7611 TM |
2239 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
2240 | loff_t end_pos) | |
863a3c6c | 2241 | { |
cd841605 | 2242 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 2243 | bool mark_as_dirty = false; |
863a3c6c | 2244 | |
cd841605 | 2245 | spin_lock(&inode->i_lock); |
863a3c6c | 2246 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 2247 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 2248 | mark_as_dirty = true; |
863a3c6c | 2249 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 2250 | __func__, inode->i_ino); |
29559b11 TM |
2251 | } else if (end_pos > nfsi->layout->plh_lwb) |
2252 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 2253 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 2254 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 2255 | pnfs_get_lseg(lseg); |
a9bae566 | 2256 | } |
cd841605 | 2257 | spin_unlock(&inode->i_lock); |
acff5880 | 2258 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 2259 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2260 | |
2261 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2262 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2263 | if (mark_as_dirty) | |
cd841605 | 2264 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2265 | } |
2266 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2267 | ||
db29c089 AA |
2268 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2269 | { | |
2270 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2271 | ||
2272 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2273 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2274 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2275 | } |
2276 | ||
de4b15c7 AA |
2277 | /* |
2278 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2279 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2280 | * data to disk to allow the server to recover the data if it crashes. | |
2281 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2282 | * is off, and a COMMIT is sent to a data server, or | |
2283 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2284 | */ | |
863a3c6c | 2285 | int |
ef311537 | 2286 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2287 | { |
5f919c9f | 2288 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2289 | struct nfs4_layoutcommit_data *data; |
2290 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2291 | loff_t end_pos; |
71244d9b | 2292 | int status; |
863a3c6c | 2293 | |
71244d9b | 2294 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2295 | return 0; |
2296 | ||
71244d9b | 2297 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2298 | |
71244d9b | 2299 | status = -EAGAIN; |
92407e75 | 2300 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2301 | if (!sync) |
2302 | goto out; | |
74316201 | 2303 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2304 | NFS_INO_LAYOUTCOMMITTING, |
2305 | nfs_wait_bit_killable, | |
2306 | TASK_KILLABLE); | |
92407e75 | 2307 | if (status) |
71244d9b | 2308 | goto out; |
92407e75 PT |
2309 | } |
2310 | ||
71244d9b TM |
2311 | status = -ENOMEM; |
2312 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2313 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2314 | if (!data) | |
2315 | goto clear_layoutcommitting; | |
2316 | ||
2317 | status = 0; | |
de4b15c7 | 2318 | spin_lock(&inode->i_lock); |
71244d9b TM |
2319 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2320 | goto out_unlock; | |
a9bae566 | 2321 | |
71244d9b | 2322 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2323 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2324 | |
acff5880 | 2325 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 2326 | |
f597c537 | 2327 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2328 | spin_unlock(&inode->i_lock); |
2329 | ||
2330 | data->args.inode = inode; | |
9fa40758 | 2331 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2332 | nfs_fattr_init(&data->fattr); |
2333 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2334 | data->res.fattr = &data->fattr; | |
2335 | data->args.lastbytewritten = end_pos - 1; | |
2336 | data->res.server = NFS_SERVER(inode); | |
2337 | ||
5f919c9f CH |
2338 | if (ld->prepare_layoutcommit) { |
2339 | status = ld->prepare_layoutcommit(&data->args); | |
2340 | if (status) { | |
3471648a | 2341 | put_rpccred(data->cred); |
5f919c9f | 2342 | spin_lock(&inode->i_lock); |
29559b11 TM |
2343 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
2344 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f | 2345 | nfsi->layout->plh_lwb = end_pos; |
3471648a | 2346 | goto out_unlock; |
5f919c9f CH |
2347 | } |
2348 | } | |
2349 | ||
2350 | ||
863a3c6c AA |
2351 | status = nfs4_proc_layoutcommit(data, sync); |
2352 | out: | |
92407e75 PT |
2353 | if (status) |
2354 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2355 | dprintk("<-- %s status %d\n", __func__, status); |
2356 | return status; | |
71244d9b TM |
2357 | out_unlock: |
2358 | spin_unlock(&inode->i_lock); | |
92407e75 | 2359 | kfree(data); |
71244d9b TM |
2360 | clear_layoutcommitting: |
2361 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2362 | goto out; |
863a3c6c | 2363 | } |
72cff449 | 2364 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 2365 | |
5bb89b47 TM |
2366 | int |
2367 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
2368 | { | |
2369 | return pnfs_layoutcommit_inode(inode, true); | |
2370 | } | |
2371 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
2372 | ||
82be417a AA |
2373 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
2374 | { | |
2375 | struct nfs4_threshold *thp; | |
2376 | ||
2377 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2378 | if (!thp) { | |
2379 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2380 | return NULL; | |
2381 | } | |
2382 | return thp; | |
2383 | } | |
8733408d | 2384 | |
865a7ecb | 2385 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d | 2386 | int |
c8ad8894 | 2387 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
8733408d PT |
2388 | { |
2389 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
2390 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 2391 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
2392 | struct nfs42_layoutstat_data *data; |
2393 | struct pnfs_layout_hdr *hdr; | |
2394 | int status = 0; | |
2395 | ||
2396 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
2397 | goto out; | |
2398 | ||
6c5a0d89 TM |
2399 | if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS)) |
2400 | goto out; | |
2401 | ||
1bfe3b25 PT |
2402 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
2403 | goto out; | |
2404 | ||
8733408d PT |
2405 | spin_lock(&inode->i_lock); |
2406 | if (!NFS_I(inode)->layout) { | |
2407 | spin_unlock(&inode->i_lock); | |
2408 | goto out; | |
2409 | } | |
2410 | hdr = NFS_I(inode)->layout; | |
2411 | pnfs_get_layout_hdr(hdr); | |
2412 | spin_unlock(&inode->i_lock); | |
2413 | ||
c8ad8894 | 2414 | data = kzalloc(sizeof(*data), gfp_flags); |
8733408d PT |
2415 | if (!data) { |
2416 | status = -ENOMEM; | |
2417 | goto out_put; | |
2418 | } | |
2419 | ||
2420 | data->args.fh = NFS_FH(inode); | |
2421 | data->args.inode = inode; | |
2422 | nfs4_stateid_copy(&data->args.stateid, &hdr->plh_stateid); | |
2423 | status = ld->prepare_layoutstats(&data->args); | |
2424 | if (status) | |
2425 | goto out_free; | |
2426 | ||
2427 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
2428 | ||
2429 | out: | |
2430 | dprintk("%s returns %d\n", __func__, status); | |
2431 | return status; | |
2432 | ||
2433 | out_free: | |
2434 | kfree(data); | |
2435 | out_put: | |
2436 | pnfs_put_layout_hdr(hdr); | |
1bfe3b25 PT |
2437 | smp_mb__before_atomic(); |
2438 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
2439 | smp_mb__after_atomic(); | |
8733408d PT |
2440 | goto out; |
2441 | } | |
2442 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 2443 | #endif |
bbf58bf3 TM |
2444 | |
2445 | unsigned int layoutstats_timer; | |
2446 | module_param(layoutstats_timer, uint, 0644); | |
2447 | EXPORT_SYMBOL_GPL(layoutstats_timer); |