Commit | Line | Data |
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85e174ba RL |
1 | /* |
2 | * pNFS functions to call and manage layout drivers. | |
3 | * | |
4 | * Copyright (c) 2002 [year of first publication] | |
5 | * The Regents of the University of Michigan | |
6 | * All Rights Reserved | |
7 | * | |
8 | * Dean Hildebrand <dhildebz@umich.edu> | |
9 | * | |
10 | * Permission is granted to use, copy, create derivative works, and | |
11 | * redistribute this software and such derivative works for any purpose, | |
12 | * so long as the name of the University of Michigan is not used in | |
13 | * any advertising or publicity pertaining to the use or distribution | |
14 | * of this software without specific, written prior authorization. If | |
15 | * the above copyright notice or any other identification of the | |
16 | * University of Michigan is included in any copy of any portion of | |
17 | * this software, then the disclaimer below must also be included. | |
18 | * | |
19 | * This software is provided as is, without representation or warranty | |
20 | * of any kind either express or implied, including without limitation | |
21 | * the implied warranties of merchantability, fitness for a particular | |
22 | * purpose, or noninfringement. The Regents of the University of | |
23 | * Michigan shall not be liable for any damages, including special, | |
24 | * indirect, incidental, or consequential damages, with respect to any | |
25 | * claim arising out of or in connection with the use of the software, | |
26 | * even if it has been or is hereafter advised of the possibility of | |
27 | * such damages. | |
28 | */ | |
29 | ||
30 | #include <linux/nfs_fs.h> | |
493292dd | 31 | #include <linux/nfs_page.h> |
143cb494 | 32 | #include <linux/module.h> |
974cec8c | 33 | #include "internal.h" |
85e174ba | 34 | #include "pnfs.h" |
64419a9b | 35 | #include "iostat.h" |
cc668ab3 | 36 | #include "nfs4trace.h" |
40dd4b7a | 37 | #include "delegation.h" |
8733408d | 38 | #include "nfs42.h" |
85e174ba RL |
39 | |
40 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 41 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 42 | |
02c35fca FI |
43 | /* Locking: |
44 | * | |
45 | * pnfs_spinlock: | |
46 | * protects pnfs_modules_tbl. | |
47 | */ | |
48 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
49 | ||
50 | /* | |
51 | * pnfs_modules_tbl holds all pnfs modules | |
52 | */ | |
53 | static LIST_HEAD(pnfs_modules_tbl); | |
54 | ||
aa1e0e3a PT |
55 | static int |
56 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, | |
6c16605d | 57 | enum pnfs_iomode iomode, bool sync); |
aa1e0e3a | 58 | |
02c35fca FI |
59 | /* Return the registered pnfs layout driver module matching given id */ |
60 | static struct pnfs_layoutdriver_type * | |
61 | find_pnfs_driver_locked(u32 id) | |
62 | { | |
63 | struct pnfs_layoutdriver_type *local; | |
64 | ||
65 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
66 | if (local->id == id) | |
67 | goto out; | |
68 | local = NULL; | |
69 | out: | |
70 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
71 | return local; | |
72 | } | |
73 | ||
85e174ba RL |
74 | static struct pnfs_layoutdriver_type * |
75 | find_pnfs_driver(u32 id) | |
76 | { | |
02c35fca FI |
77 | struct pnfs_layoutdriver_type *local; |
78 | ||
79 | spin_lock(&pnfs_spinlock); | |
80 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
81 | if (local != NULL && !try_module_get(local->owner)) { |
82 | dprintk("%s: Could not grab reference on module\n", __func__); | |
83 | local = NULL; | |
84 | } | |
02c35fca FI |
85 | spin_unlock(&pnfs_spinlock); |
86 | return local; | |
85e174ba RL |
87 | } |
88 | ||
89 | void | |
90 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
91 | { | |
738fd0f3 BH |
92 | if (nfss->pnfs_curr_ld) { |
93 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
94 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
95 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
96 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
97 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 98 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 99 | } |
85e174ba RL |
100 | nfss->pnfs_curr_ld = NULL; |
101 | } | |
102 | ||
103 | /* | |
104 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
105 | * Currently only one pNFS layout driver per filesystem is supported. | |
106 | * | |
107 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
108 | */ | |
109 | void | |
738fd0f3 BH |
110 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
111 | u32 id) | |
85e174ba RL |
112 | { |
113 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
114 | ||
115 | if (id == 0) | |
116 | goto out_no_driver; | |
117 | if (!(server->nfs_client->cl_exchange_flags & | |
118 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
a030889a WAA |
119 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
120 | __func__, id, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
121 | goto out_no_driver; |
122 | } | |
123 | ld_type = find_pnfs_driver(id); | |
124 | if (!ld_type) { | |
125 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
126 | ld_type = find_pnfs_driver(id); | |
127 | if (!ld_type) { | |
128 | dprintk("%s: No pNFS module found for %u.\n", | |
129 | __func__, id); | |
130 | goto out_no_driver; | |
131 | } | |
132 | } | |
133 | server->pnfs_curr_ld = ld_type; | |
738fd0f3 BH |
134 | if (ld_type->set_layoutdriver |
135 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
136 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
137 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
138 | module_put(ld_type->owner); |
139 | goto out_no_driver; | |
140 | } | |
2a4c8994 TM |
141 | /* Bump the MDS count */ |
142 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 143 | |
85e174ba RL |
144 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
145 | return; | |
146 | ||
147 | out_no_driver: | |
148 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
149 | server->pnfs_curr_ld = NULL; | |
150 | } | |
02c35fca FI |
151 | |
152 | int | |
153 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
154 | { | |
155 | int status = -EINVAL; | |
156 | struct pnfs_layoutdriver_type *tmp; | |
157 | ||
158 | if (ld_type->id == 0) { | |
a030889a | 159 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
160 | return status; |
161 | } | |
b1f69b75 | 162 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 163 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
164 | "alloc_lseg and free_lseg.\n", __func__); |
165 | return status; | |
166 | } | |
02c35fca FI |
167 | |
168 | spin_lock(&pnfs_spinlock); | |
169 | tmp = find_pnfs_driver_locked(ld_type->id); | |
170 | if (!tmp) { | |
171 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
172 | status = 0; | |
173 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
174 | ld_type->name); | |
175 | } else { | |
a030889a | 176 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
177 | __func__, ld_type->id); |
178 | } | |
179 | spin_unlock(&pnfs_spinlock); | |
180 | ||
181 | return status; | |
182 | } | |
183 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
184 | ||
185 | void | |
186 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
187 | { | |
188 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
189 | spin_lock(&pnfs_spinlock); | |
190 | list_del(&ld_type->pnfs_tblid); | |
191 | spin_unlock(&pnfs_spinlock); | |
192 | } | |
193 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 194 | |
b1f69b75 AA |
195 | /* |
196 | * pNFS client layout cache | |
197 | */ | |
198 | ||
cc6e5340 | 199 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 200 | void |
70c3bd2b | 201 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 202 | { |
cc6e5340 | 203 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
204 | } |
205 | ||
636fb9c8 BH |
206 | static struct pnfs_layout_hdr * |
207 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
208 | { | |
209 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 210 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
211 | } |
212 | ||
213 | static void | |
214 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
215 | { | |
9c626381 TM |
216 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
217 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
218 | ||
219 | if (!list_empty(&lo->plh_layouts)) { | |
220 | struct nfs_client *clp = server->nfs_client; | |
221 | ||
222 | spin_lock(&clp->cl_lock); | |
223 | list_del_init(&lo->plh_layouts); | |
224 | spin_unlock(&clp->cl_lock); | |
225 | } | |
9fa40758 | 226 | put_rpccred(lo->plh_lc_cred); |
57934278 | 227 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
228 | } |
229 | ||
e5e94017 | 230 | static void |
6622c3ea | 231 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 232 | { |
bb346f63 | 233 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 234 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
235 | nfsi->layout = NULL; |
236 | /* Reset MDS Threshold I/O counters */ | |
237 | nfsi->write_io = 0; | |
238 | nfsi->read_io = 0; | |
e5e94017 BH |
239 | } |
240 | ||
b1f69b75 | 241 | void |
70c3bd2b | 242 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 243 | { |
cc6e5340 FI |
244 | struct inode *inode = lo->plh_inode; |
245 | ||
246 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { | |
566f8737 PT |
247 | if (!list_empty(&lo->plh_segs)) |
248 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 249 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 250 | spin_unlock(&inode->i_lock); |
6622c3ea | 251 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 252 | } |
974cec8c AA |
253 | } |
254 | ||
b9e028fd TM |
255 | static int |
256 | pnfs_iomode_to_fail_bit(u32 iomode) | |
257 | { | |
258 | return iomode == IOMODE_RW ? | |
259 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
260 | } | |
261 | ||
262 | static void | |
3e621214 | 263 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 264 | { |
25c75333 | 265 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 266 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
267 | atomic_inc(&lo->plh_refcount); |
268 | } | |
269 | ||
270 | static void | |
271 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
272 | { | |
273 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
274 | atomic_dec(&lo->plh_refcount); | |
275 | } | |
276 | ||
277 | static void | |
278 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
279 | { | |
280 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
281 | struct pnfs_layout_range range = { |
282 | .iomode = iomode, | |
283 | .offset = 0, | |
284 | .length = NFS4_MAX_UINT64, | |
285 | }; | |
286 | LIST_HEAD(head); | |
3e621214 TM |
287 | |
288 | spin_lock(&inode->i_lock); | |
289 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 290 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 291 | spin_unlock(&inode->i_lock); |
115ce575 | 292 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
293 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
294 | iomode == IOMODE_RW ? "RW" : "READ"); | |
295 | } | |
296 | ||
297 | static bool | |
298 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
299 | { | |
25c75333 | 300 | unsigned long start, end; |
3e621214 TM |
301 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
302 | ||
303 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
304 | return false; |
305 | end = jiffies; | |
306 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
307 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
308 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 309 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
310 | return false; |
311 | } | |
312 | return true; | |
b9e028fd TM |
313 | } |
314 | ||
974cec8c AA |
315 | static void |
316 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
317 | { | |
566052c5 | 318 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 319 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
320 | atomic_set(&lseg->pls_refcount, 1); |
321 | smp_mb(); | |
322 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 323 | lseg->pls_layout = lo; |
974cec8c AA |
324 | } |
325 | ||
905ca191 | 326 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 327 | { |
b7edfaa1 | 328 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 329 | |
b1f69b75 | 330 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
331 | } |
332 | ||
d684d2ae | 333 | static void |
57036a37 TM |
334 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
335 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 336 | { |
57036a37 | 337 | struct inode *inode = lo->plh_inode; |
d684d2ae | 338 | |
d20581aa | 339 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 340 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
341 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
342 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
343 | if (list_empty(&lo->plh_segs)) |
344 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
345 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
346 | } | |
347 | ||
aa1e0e3a PT |
348 | /* Return true if layoutreturn is needed */ |
349 | static bool | |
350 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo, | |
27b6f539 | 351 | struct pnfs_layout_segment *lseg) |
aa1e0e3a PT |
352 | { |
353 | struct pnfs_layout_segment *s; | |
354 | ||
355 | if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
356 | return false; | |
357 | ||
358 | list_for_each_entry(s, &lo->plh_segs, pls_list) | |
27b6f539 | 359 | if (s != lseg && test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) |
aa1e0e3a PT |
360 | return false; |
361 | ||
aa1e0e3a PT |
362 | return true; |
363 | } | |
364 | ||
4ef2e4f8 TM |
365 | static void pnfs_layoutreturn_before_put_lseg(struct pnfs_layout_segment *lseg, |
366 | struct pnfs_layout_hdr *lo, struct inode *inode) | |
27b6f539 | 367 | { |
27b6f539 PT |
368 | lo = lseg->pls_layout; |
369 | inode = lo->plh_inode; | |
370 | ||
371 | spin_lock(&inode->i_lock); | |
372 | if (pnfs_layout_need_return(lo, lseg)) { | |
373 | nfs4_stateid stateid; | |
374 | enum pnfs_iomode iomode; | |
375 | ||
376 | stateid = lo->plh_stateid; | |
377 | iomode = lo->plh_return_iomode; | |
378 | /* decreased in pnfs_send_layoutreturn() */ | |
379 | lo->plh_block_lgets++; | |
380 | lo->plh_return_iomode = 0; | |
381 | spin_unlock(&inode->i_lock); | |
4ef2e4f8 | 382 | pnfs_get_layout_hdr(lo); |
27b6f539 | 383 | |
4ef2e4f8 TM |
384 | /* Send an async layoutreturn so we dont deadlock */ |
385 | pnfs_send_layoutreturn(lo, stateid, iomode, false); | |
27b6f539 | 386 | } else |
4ef2e4f8 | 387 | spin_unlock(&inode->i_lock); |
27b6f539 PT |
388 | } |
389 | ||
bae724ef | 390 | void |
9369a431 | 391 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 392 | { |
57036a37 | 393 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
394 | struct inode *inode; |
395 | ||
396 | if (!lseg) | |
397 | return; | |
398 | ||
4541d16c FI |
399 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
400 | atomic_read(&lseg->pls_refcount), | |
401 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
4ef2e4f8 TM |
402 | |
403 | /* Handle the case where refcount != 1 */ | |
404 | if (atomic_add_unless(&lseg->pls_refcount, -1, 1)) | |
405 | return; | |
406 | ||
57036a37 TM |
407 | lo = lseg->pls_layout; |
408 | inode = lo->plh_inode; | |
4ef2e4f8 TM |
409 | /* Do we need a layoutreturn? */ |
410 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
411 | pnfs_layoutreturn_before_put_lseg(lseg, lo, inode); | |
412 | ||
d684d2ae | 413 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
8f0d27dc | 414 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 TM |
415 | pnfs_layout_remove_lseg(lo, lseg); |
416 | spin_unlock(&inode->i_lock); | |
417 | pnfs_free_lseg(lseg); | |
418 | pnfs_put_layout_hdr(lo); | |
4541d16c | 419 | } |
4541d16c | 420 | } |
9369a431 | 421 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 422 | |
6543f803 | 423 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
424 | { |
425 | struct pnfs_layout_segment *lseg; | |
6543f803 | 426 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
427 | |
428 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 429 | lo = lseg->pls_layout; |
e6cf82d1 | 430 | |
6543f803 TM |
431 | pnfs_free_lseg(lseg); |
432 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
433 | } |
434 | ||
6543f803 | 435 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 436 | { |
6543f803 | 437 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
438 | schedule_work(&lseg->pls_work); |
439 | } | |
6543f803 TM |
440 | |
441 | void | |
442 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
443 | { | |
444 | if (!lseg) | |
445 | return; | |
446 | ||
447 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
448 | ||
449 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
450 | atomic_read(&lseg->pls_refcount), | |
451 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
452 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
453 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
454 | pnfs_get_layout_hdr(lo); | |
455 | pnfs_layout_remove_lseg(lo, lseg); | |
456 | pnfs_free_lseg_async(lseg); | |
457 | } | |
458 | } | |
459 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 460 | |
3cb2df17 | 461 | static u64 |
fb3296eb BH |
462 | end_offset(u64 start, u64 len) |
463 | { | |
464 | u64 end; | |
465 | ||
466 | end = start + len; | |
467 | return end >= start ? end : NFS4_MAX_UINT64; | |
468 | } | |
469 | ||
fb3296eb BH |
470 | /* |
471 | * is l2 fully contained in l1? | |
472 | * start1 end1 | |
473 | * [----------------------------------) | |
474 | * start2 end2 | |
475 | * [----------------) | |
476 | */ | |
3cb2df17 | 477 | static bool |
7dc0ac70 | 478 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 479 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
480 | { |
481 | u64 start1 = l1->offset; | |
482 | u64 end1 = end_offset(start1, l1->length); | |
483 | u64 start2 = l2->offset; | |
484 | u64 end2 = end_offset(start2, l2->length); | |
485 | ||
486 | return (start1 <= start2) && (end1 >= end2); | |
487 | } | |
488 | ||
489 | /* | |
490 | * is l1 and l2 intersecting? | |
491 | * start1 end1 | |
492 | * [----------------------------------) | |
493 | * start2 end2 | |
494 | * [----------------) | |
495 | */ | |
3cb2df17 | 496 | static bool |
7dc0ac70 | 497 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 498 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
499 | { |
500 | u64 start1 = l1->offset; | |
501 | u64 end1 = end_offset(start1, l1->length); | |
502 | u64 start2 = l2->offset; | |
503 | u64 end2 = end_offset(start2, l2->length); | |
504 | ||
505 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
506 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
507 | } | |
508 | ||
4541d16c | 509 | static bool |
3cb2df17 TM |
510 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
511 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 512 | { |
778b5502 BH |
513 | return (recall_range->iomode == IOMODE_ANY || |
514 | lseg_range->iomode == recall_range->iomode) && | |
7dc0ac70 | 515 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
974cec8c AA |
516 | } |
517 | ||
24956804 TM |
518 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
519 | struct list_head *tmp_list) | |
520 | { | |
521 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
522 | return false; | |
523 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
524 | list_add(&lseg->pls_list, tmp_list); | |
525 | return true; | |
526 | } | |
527 | ||
4541d16c FI |
528 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
529 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
530 | struct list_head *tmp_list) | |
531 | { | |
532 | int rv = 0; | |
533 | ||
534 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
535 | /* Remove the reference keeping the lseg in the | |
536 | * list. It will now be removed when all | |
537 | * outstanding io is finished. | |
538 | */ | |
d684d2ae FI |
539 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
540 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 541 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 542 | rv = 1; |
4541d16c FI |
543 | } |
544 | return rv; | |
545 | } | |
546 | ||
547 | /* Returns count of number of matching invalid lsegs remaining in list | |
548 | * after call. | |
549 | */ | |
43f1b3da | 550 | int |
49a85061 | 551 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 552 | struct list_head *tmp_list, |
778b5502 | 553 | struct pnfs_layout_range *recall_range) |
974cec8c AA |
554 | { |
555 | struct pnfs_layout_segment *lseg, *next; | |
4541d16c | 556 | int invalid = 0, removed = 0; |
974cec8c AA |
557 | |
558 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
559 | ||
8006bfba | 560 | if (list_empty(&lo->plh_segs)) |
38511722 | 561 | return 0; |
4541d16c | 562 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
563 | if (!recall_range || |
564 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
565 | dprintk("%s: freeing lseg %p iomode %d " |
566 | "offset %llu length %llu\n", __func__, | |
567 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
568 | lseg->pls_range.length); | |
569 | invalid++; | |
570 | removed += mark_lseg_invalid(lseg, tmp_list); | |
571 | } | |
572 | dprintk("%s:Return %i\n", __func__, invalid - removed); | |
573 | return invalid - removed; | |
974cec8c AA |
574 | } |
575 | ||
f49f9baa | 576 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 577 | void |
4541d16c | 578 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 579 | { |
4541d16c | 580 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
581 | |
582 | if (list_empty(free_me)) | |
583 | return; | |
584 | ||
4541d16c | 585 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 586 | list_del(&lseg->pls_list); |
905ca191 | 587 | pnfs_free_lseg(lseg); |
974cec8c AA |
588 | } |
589 | } | |
590 | ||
e5e94017 BH |
591 | void |
592 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
593 | { | |
594 | struct pnfs_layout_hdr *lo; | |
974cec8c | 595 | LIST_HEAD(tmp_list); |
e5e94017 BH |
596 | |
597 | spin_lock(&nfsi->vfs_inode.i_lock); | |
598 | lo = nfsi->layout; | |
599 | if (lo) { | |
38511722 | 600 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
49a85061 | 601 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
3e621214 TM |
602 | pnfs_get_layout_hdr(lo); |
603 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); | |
604 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
c829013d | 605 | pnfs_clear_retry_layoutget(lo); |
3e621214 TM |
606 | spin_unlock(&nfsi->vfs_inode.i_lock); |
607 | pnfs_free_lseg_list(&tmp_list); | |
608 | pnfs_put_layout_hdr(lo); | |
609 | } else | |
610 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 611 | } |
041245c8 | 612 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 613 | |
fd9a8d71 TM |
614 | static bool |
615 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
616 | struct list_head *layout_list) | |
974cec8c AA |
617 | { |
618 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 619 | bool ret = false; |
974cec8c | 620 | |
fd9a8d71 TM |
621 | spin_lock(&inode->i_lock); |
622 | lo = NFS_I(inode)->layout; | |
623 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
624 | pnfs_get_layout_hdr(lo); | |
625 | list_add(&lo->plh_bulk_destroy, layout_list); | |
626 | ret = true; | |
627 | } | |
628 | spin_unlock(&inode->i_lock); | |
629 | return ret; | |
630 | } | |
631 | ||
632 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
633 | static int | |
634 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
635 | struct nfs_server *server, | |
636 | struct list_head *layout_list) | |
637 | { | |
638 | struct pnfs_layout_hdr *lo, *next; | |
639 | struct inode *inode; | |
640 | ||
641 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
642 | inode = igrab(lo->plh_inode); | |
643 | if (inode == NULL) | |
644 | continue; | |
645 | list_del_init(&lo->plh_layouts); | |
646 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
647 | continue; | |
648 | rcu_read_unlock(); | |
649 | spin_unlock(&clp->cl_lock); | |
650 | iput(inode); | |
651 | spin_lock(&clp->cl_lock); | |
652 | rcu_read_lock(); | |
653 | return -EAGAIN; | |
654 | } | |
655 | return 0; | |
656 | } | |
657 | ||
658 | static int | |
659 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
660 | bool is_bulk_recall) | |
661 | { | |
662 | struct pnfs_layout_hdr *lo; | |
663 | struct inode *inode; | |
664 | struct pnfs_layout_range range = { | |
665 | .iomode = IOMODE_ANY, | |
666 | .offset = 0, | |
667 | .length = NFS4_MAX_UINT64, | |
668 | }; | |
669 | LIST_HEAD(lseg_list); | |
670 | int ret = 0; | |
671 | ||
672 | while (!list_empty(layout_list)) { | |
673 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
674 | plh_bulk_destroy); | |
675 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
676 | lo->plh_inode->i_ino); | |
677 | inode = lo->plh_inode; | |
7c5d1875 CH |
678 | |
679 | pnfs_layoutcommit_inode(inode, false); | |
680 | ||
fd9a8d71 TM |
681 | spin_lock(&inode->i_lock); |
682 | list_del_init(&lo->plh_bulk_destroy); | |
683 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ | |
684 | if (is_bulk_recall) | |
685 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
686 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) | |
687 | ret = -EAGAIN; | |
688 | spin_unlock(&inode->i_lock); | |
689 | pnfs_free_lseg_list(&lseg_list); | |
690 | pnfs_put_layout_hdr(lo); | |
691 | iput(inode); | |
692 | } | |
693 | return ret; | |
694 | } | |
695 | ||
696 | int | |
697 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
698 | struct nfs_fsid *fsid, | |
699 | bool is_recall) | |
700 | { | |
701 | struct nfs_server *server; | |
702 | LIST_HEAD(layout_list); | |
c47abcf8 | 703 | |
974cec8c | 704 | spin_lock(&clp->cl_lock); |
6382a441 | 705 | rcu_read_lock(); |
fd9a8d71 | 706 | restart: |
6382a441 | 707 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
708 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
709 | continue; | |
710 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
711 | server, | |
712 | &layout_list) != 0) | |
713 | goto restart; | |
6382a441 WAA |
714 | } |
715 | rcu_read_unlock(); | |
974cec8c AA |
716 | spin_unlock(&clp->cl_lock); |
717 | ||
fd9a8d71 TM |
718 | if (list_empty(&layout_list)) |
719 | return 0; | |
720 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
721 | } | |
722 | ||
723 | int | |
724 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
725 | bool is_recall) | |
726 | { | |
727 | struct nfs_server *server; | |
728 | LIST_HEAD(layout_list); | |
729 | ||
730 | spin_lock(&clp->cl_lock); | |
731 | rcu_read_lock(); | |
732 | restart: | |
733 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
734 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
735 | server, | |
736 | &layout_list) != 0) | |
737 | goto restart; | |
974cec8c | 738 | } |
fd9a8d71 TM |
739 | rcu_read_unlock(); |
740 | spin_unlock(&clp->cl_lock); | |
741 | ||
742 | if (list_empty(&layout_list)) | |
743 | return 0; | |
744 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
745 | } | |
746 | ||
747 | /* | |
748 | * Called by the state manger to remove all layouts established under an | |
749 | * expired lease. | |
750 | */ | |
751 | void | |
752 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
753 | { | |
754 | nfs4_deviceid_mark_client_invalid(clp); | |
755 | nfs4_deviceid_purge_client(clp); | |
756 | ||
757 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
758 | } |
759 | ||
5a65503f TM |
760 | /* |
761 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
762 | * taking into account wraparound issues. | |
763 | */ | |
764 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
765 | { | |
2c64c57d | 766 | return (s32)(s1 - s2) > 0; |
5a65503f TM |
767 | } |
768 | ||
fd6002e9 | 769 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
770 | void |
771 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
772 | bool update_barrier) | |
b1f69b75 | 773 | { |
22aaf714 TM |
774 | u32 oldseq, newseq, new_barrier; |
775 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 776 | |
2d2f24ad TM |
777 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
778 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 779 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 780 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 781 | if (update_barrier) { |
22aaf714 | 782 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
783 | } else { |
784 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 785 | * "close" to the current seqids. |
43f1b3da | 786 | */ |
22aaf714 | 787 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 788 | } |
22aaf714 TM |
789 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
790 | lo->plh_barrier = new_barrier; | |
43f1b3da | 791 | } |
b1f69b75 AA |
792 | } |
793 | ||
cf7d63f1 | 794 | static bool |
19c54aba TM |
795 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
796 | const nfs4_stateid *stateid) | |
43f1b3da | 797 | { |
19c54aba | 798 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 799 | |
19c54aba TM |
800 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
801 | } | |
802 | ||
ce6ab4f2 PT |
803 | static bool |
804 | pnfs_layout_returning(const struct pnfs_layout_hdr *lo, | |
805 | struct pnfs_layout_range *range) | |
806 | { | |
807 | return test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) && | |
808 | (lo->plh_return_iomode == IOMODE_ANY || | |
809 | lo->plh_return_iomode == range->iomode); | |
810 | } | |
811 | ||
19c54aba TM |
812 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
813 | static bool | |
ce6ab4f2 PT |
814 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, |
815 | struct pnfs_layout_range *range, int lget) | |
19c54aba | 816 | { |
f7e8917a FI |
817 | return lo->plh_block_lgets || |
818 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
43f1b3da | 819 | (list_empty(&lo->plh_segs) && |
ce6ab4f2 PT |
820 | (atomic_read(&lo->plh_outstanding) > lget)) || |
821 | pnfs_layout_returning(lo, range); | |
cf7d63f1 FI |
822 | } |
823 | ||
fd6002e9 FI |
824 | int |
825 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
ce6ab4f2 | 826 | struct pnfs_layout_range *range, |
fd6002e9 | 827 | struct nfs4_state *open_state) |
b1f69b75 | 828 | { |
fd6002e9 | 829 | int status = 0; |
974cec8c | 830 | |
b1f69b75 | 831 | dprintk("--> %s\n", __func__); |
fd6002e9 | 832 | spin_lock(&lo->plh_inode->i_lock); |
ce6ab4f2 | 833 | if (pnfs_layoutgets_blocked(lo, range, 1)) { |
cf7d63f1 | 834 | status = -EAGAIN; |
5d422301 TM |
835 | } else if (!nfs4_valid_open_stateid(open_state)) { |
836 | status = -EBADF; | |
47abadef CH |
837 | } else if (list_empty(&lo->plh_segs) || |
838 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { | |
fd6002e9 FI |
839 | int seq; |
840 | ||
841 | do { | |
842 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 843 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
844 | } while (read_seqretry(&open_state->seqlock, seq)); |
845 | } else | |
f597c537 | 846 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 847 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 848 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 849 | return status; |
b1f69b75 AA |
850 | } |
851 | ||
852 | /* | |
853 | * Get layout from server. | |
854 | * for now, assume that whole file layouts are requested. | |
855 | * arg->offset: 0 | |
856 | * arg->length: all ones | |
857 | */ | |
e5e94017 BH |
858 | static struct pnfs_layout_segment * |
859 | send_layoutget(struct pnfs_layout_hdr *lo, | |
860 | struct nfs_open_context *ctx, | |
fb3296eb | 861 | struct pnfs_layout_range *range, |
a75b9df9 | 862 | gfp_t gfp_flags) |
e5e94017 | 863 | { |
b7edfaa1 | 864 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
865 | struct nfs_server *server = NFS_SERVER(ino); |
866 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 867 | struct pnfs_layout_segment *lseg; |
b1f69b75 AA |
868 | |
869 | dprintk("--> %s\n", __func__); | |
e5e94017 | 870 | |
a75b9df9 | 871 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
cf7d63f1 | 872 | if (lgp == NULL) |
b1f69b75 | 873 | return NULL; |
35124a09 | 874 | |
fb3296eb BH |
875 | lgp->args.minlength = PAGE_CACHE_SIZE; |
876 | if (lgp->args.minlength > range->length) | |
877 | lgp->args.minlength = range->length; | |
b1f69b75 | 878 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
fb3296eb | 879 | lgp->args.range = *range; |
b1f69b75 AA |
880 | lgp->args.type = server->pnfs_curr_ld->id; |
881 | lgp->args.inode = ino; | |
882 | lgp->args.ctx = get_nfs_open_context(ctx); | |
a75b9df9 | 883 | lgp->gfp_flags = gfp_flags; |
6ab59344 | 884 | lgp->cred = lo->plh_lc_cred; |
b1f69b75 AA |
885 | |
886 | /* Synchronously retrieve layout information from server and | |
887 | * store in lseg. | |
888 | */ | |
a0b0a6e3 TM |
889 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
890 | if (IS_ERR(lseg)) { | |
891 | switch (PTR_ERR(lseg)) { | |
892 | case -ENOMEM: | |
893 | case -ERESTARTSYS: | |
894 | break; | |
895 | default: | |
896 | /* remember that LAYOUTGET failed and suspend trying */ | |
b9e028fd | 897 | pnfs_layout_io_set_failed(lo, range->iomode); |
a0b0a6e3 TM |
898 | } |
899 | return NULL; | |
d67ae825 TH |
900 | } else |
901 | pnfs_layout_clear_fail_bit(lo, | |
902 | pnfs_iomode_to_fail_bit(range->iomode)); | |
35124a09 | 903 | |
974cec8c AA |
904 | return lseg; |
905 | } | |
906 | ||
24956804 TM |
907 | static void pnfs_clear_layoutcommit(struct inode *inode, |
908 | struct list_head *head) | |
909 | { | |
910 | struct nfs_inode *nfsi = NFS_I(inode); | |
911 | struct pnfs_layout_segment *lseg, *tmp; | |
912 | ||
913 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
914 | return; | |
915 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
916 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
917 | continue; | |
918 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
919 | } | |
920 | } | |
921 | ||
d67ae825 TH |
922 | void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
923 | { | |
924 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
925 | smp_mb__after_atomic(); | |
926 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
927 | } | |
928 | ||
f40eb5d0 PT |
929 | static int |
930 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, | |
6c16605d | 931 | enum pnfs_iomode iomode, bool sync) |
f40eb5d0 PT |
932 | { |
933 | struct inode *ino = lo->plh_inode; | |
934 | struct nfs4_layoutreturn *lrp; | |
935 | int status = 0; | |
936 | ||
e4af440a | 937 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
938 | if (unlikely(lrp == NULL)) { |
939 | status = -ENOMEM; | |
940 | spin_lock(&ino->i_lock); | |
941 | lo->plh_block_lgets--; | |
d67ae825 | 942 | pnfs_clear_layoutreturn_waitbit(lo); |
193e3aa2 | 943 | rpc_wake_up(&NFS_SERVER(ino)->roc_rpcwaitq); |
f40eb5d0 PT |
944 | spin_unlock(&ino->i_lock); |
945 | pnfs_put_layout_hdr(lo); | |
946 | goto out; | |
947 | } | |
948 | ||
949 | lrp->args.stateid = stateid; | |
950 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; | |
951 | lrp->args.inode = ino; | |
15eb67c1 PT |
952 | lrp->args.range.iomode = iomode; |
953 | lrp->args.range.offset = 0; | |
954 | lrp->args.range.length = NFS4_MAX_UINT64; | |
f40eb5d0 PT |
955 | lrp->args.layout = lo; |
956 | lrp->clp = NFS_SERVER(ino)->nfs_client; | |
957 | lrp->cred = lo->plh_lc_cred; | |
958 | ||
6c16605d | 959 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
960 | out: |
961 | dprintk("<-- %s status: %d\n", __func__, status); | |
962 | return status; | |
963 | } | |
964 | ||
293b3b06 AA |
965 | /* |
966 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
967 | * when the layout segment list is empty. | |
968 | * | |
969 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
970 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
971 | * deviceid is marked invalid. | |
972 | */ | |
cbe82603 BH |
973 | int |
974 | _pnfs_return_layout(struct inode *ino) | |
975 | { | |
976 | struct pnfs_layout_hdr *lo = NULL; | |
977 | struct nfs_inode *nfsi = NFS_I(ino); | |
978 | LIST_HEAD(tmp_list); | |
cbe82603 | 979 | nfs4_stateid stateid; |
293b3b06 | 980 | int status = 0, empty; |
cbe82603 | 981 | |
366d5052 | 982 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
983 | |
984 | spin_lock(&ino->i_lock); | |
985 | lo = nfsi->layout; | |
e5929f3c | 986 | if (!lo) { |
cbe82603 | 987 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
988 | dprintk("NFS: %s no layout to return\n", __func__); |
989 | goto out; | |
cbe82603 BH |
990 | } |
991 | stateid = nfsi->layout->plh_stateid; | |
992 | /* Reference matched in nfs4_layoutreturn_release */ | |
70c3bd2b | 993 | pnfs_get_layout_hdr(lo); |
293b3b06 | 994 | empty = list_empty(&lo->plh_segs); |
24956804 | 995 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 996 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
c88953d8 CH |
997 | |
998 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
999 | struct pnfs_layout_range range = { | |
1000 | .iomode = IOMODE_ANY, | |
1001 | .offset = 0, | |
1002 | .length = NFS4_MAX_UINT64, | |
1003 | }; | |
1004 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1005 | } | |
1006 | ||
293b3b06 AA |
1007 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
1008 | if (empty) { | |
1009 | spin_unlock(&ino->i_lock); | |
70c3bd2b | 1010 | pnfs_put_layout_hdr(lo); |
293b3b06 AA |
1011 | dprintk("NFS: %s no layout segments to return\n", __func__); |
1012 | goto out; | |
1013 | } | |
47abadef CH |
1014 | |
1015 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
ea0ded74 | 1016 | lo->plh_block_lgets++; |
cbe82603 BH |
1017 | spin_unlock(&ino->i_lock); |
1018 | pnfs_free_lseg_list(&tmp_list); | |
1019 | ||
6c16605d | 1020 | status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true); |
cbe82603 BH |
1021 | out: |
1022 | dprintk("<-- %s status: %d\n", __func__, status); | |
1023 | return status; | |
1024 | } | |
0a57cdac | 1025 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 1026 | |
24028672 TM |
1027 | int |
1028 | pnfs_commit_and_return_layout(struct inode *inode) | |
1029 | { | |
1030 | struct pnfs_layout_hdr *lo; | |
1031 | int ret; | |
1032 | ||
1033 | spin_lock(&inode->i_lock); | |
1034 | lo = NFS_I(inode)->layout; | |
1035 | if (lo == NULL) { | |
1036 | spin_unlock(&inode->i_lock); | |
1037 | return 0; | |
1038 | } | |
1039 | pnfs_get_layout_hdr(lo); | |
1040 | /* Block new layoutgets and read/write to ds */ | |
1041 | lo->plh_block_lgets++; | |
1042 | spin_unlock(&inode->i_lock); | |
1043 | filemap_fdatawait(inode->i_mapping); | |
1044 | ret = pnfs_layoutcommit_inode(inode, true); | |
1045 | if (ret == 0) | |
1046 | ret = _pnfs_return_layout(inode); | |
1047 | spin_lock(&inode->i_lock); | |
1048 | lo->plh_block_lgets--; | |
1049 | spin_unlock(&inode->i_lock); | |
1050 | pnfs_put_layout_hdr(lo); | |
1051 | return ret; | |
1052 | } | |
1053 | ||
f7e8917a FI |
1054 | bool pnfs_roc(struct inode *ino) |
1055 | { | |
40dd4b7a TM |
1056 | struct nfs_inode *nfsi = NFS_I(ino); |
1057 | struct nfs_open_context *ctx; | |
1058 | struct nfs4_state *state; | |
f7e8917a FI |
1059 | struct pnfs_layout_hdr *lo; |
1060 | struct pnfs_layout_segment *lseg, *tmp; | |
193e3aa2 | 1061 | nfs4_stateid stateid; |
f7e8917a | 1062 | LIST_HEAD(tmp_list); |
193e3aa2 | 1063 | bool found = false, layoutreturn = false; |
f7e8917a FI |
1064 | |
1065 | spin_lock(&ino->i_lock); | |
40dd4b7a | 1066 | lo = nfsi->layout; |
f7e8917a FI |
1067 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || |
1068 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) | |
40dd4b7a TM |
1069 | goto out_noroc; |
1070 | ||
1071 | /* Don't return layout if we hold a delegation */ | |
1072 | if (nfs4_check_delegation(ino, FMODE_READ)) | |
1073 | goto out_noroc; | |
1074 | ||
1075 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1076 | state = ctx->state; | |
1077 | /* Don't return layout if there is open file state */ | |
1078 | if (state != NULL && state->state != 0) | |
1079 | goto out_noroc; | |
1080 | } | |
1081 | ||
c829013d | 1082 | pnfs_clear_retry_layoutget(lo); |
f7e8917a FI |
1083 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
1084 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
1085 | mark_lseg_invalid(lseg, &tmp_list); | |
1086 | found = true; | |
1087 | } | |
1088 | if (!found) | |
40dd4b7a | 1089 | goto out_noroc; |
f7e8917a | 1090 | lo->plh_block_lgets++; |
70c3bd2b | 1091 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
f7e8917a FI |
1092 | spin_unlock(&ino->i_lock); |
1093 | pnfs_free_lseg_list(&tmp_list); | |
7140171e | 1094 | pnfs_layoutcommit_inode(ino, true); |
f7e8917a FI |
1095 | return true; |
1096 | ||
40dd4b7a | 1097 | out_noroc: |
193e3aa2 PT |
1098 | if (lo) { |
1099 | stateid = lo->plh_stateid; | |
1100 | layoutreturn = | |
1101 | test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, | |
1102 | &lo->plh_flags); | |
1103 | if (layoutreturn) { | |
1104 | lo->plh_block_lgets++; | |
1105 | pnfs_get_layout_hdr(lo); | |
1106 | } | |
1107 | } | |
f7e8917a | 1108 | spin_unlock(&ino->i_lock); |
7140171e TM |
1109 | if (layoutreturn) { |
1110 | pnfs_layoutcommit_inode(ino, true); | |
27b6f539 | 1111 | pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true); |
7140171e | 1112 | } |
f7e8917a FI |
1113 | return false; |
1114 | } | |
1115 | ||
1116 | void pnfs_roc_release(struct inode *ino) | |
1117 | { | |
1118 | struct pnfs_layout_hdr *lo; | |
1119 | ||
1120 | spin_lock(&ino->i_lock); | |
1121 | lo = NFS_I(ino)->layout; | |
1122 | lo->plh_block_lgets--; | |
6622c3ea TM |
1123 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1124 | pnfs_detach_layout_hdr(lo); | |
1125 | spin_unlock(&ino->i_lock); | |
1126 | pnfs_free_layout_hdr(lo); | |
1127 | } else | |
1128 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1129 | } |
1130 | ||
1131 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1132 | { | |
1133 | struct pnfs_layout_hdr *lo; | |
1134 | ||
1135 | spin_lock(&ino->i_lock); | |
1136 | lo = NFS_I(ino)->layout; | |
0f35ad6f | 1137 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1138 | lo->plh_barrier = barrier; |
1139 | spin_unlock(&ino->i_lock); | |
1140 | } | |
1141 | ||
7fdab069 | 1142 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
f7e8917a FI |
1143 | { |
1144 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1145 | struct pnfs_layout_hdr *lo; |
f7e8917a | 1146 | struct pnfs_layout_segment *lseg; |
193e3aa2 | 1147 | nfs4_stateid stateid; |
7fdab069 | 1148 | u32 current_seqid; |
193e3aa2 | 1149 | bool found = false, layoutreturn = false; |
f7e8917a FI |
1150 | |
1151 | spin_lock(&ino->i_lock); | |
1152 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) | |
1153 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
7fdab069 | 1154 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
f7e8917a | 1155 | found = true; |
7fdab069 | 1156 | goto out; |
f7e8917a | 1157 | } |
7fdab069 TM |
1158 | lo = nfsi->layout; |
1159 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1160 | |
7fdab069 TM |
1161 | /* Since close does not return a layout stateid for use as |
1162 | * a barrier, we choose the worst-case barrier. | |
1163 | */ | |
1164 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
1165 | out: | |
193e3aa2 PT |
1166 | if (!found) { |
1167 | stateid = lo->plh_stateid; | |
1168 | layoutreturn = | |
1169 | test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, | |
1170 | &lo->plh_flags); | |
1171 | if (layoutreturn) { | |
1172 | lo->plh_block_lgets++; | |
1173 | pnfs_get_layout_hdr(lo); | |
1174 | } | |
1175 | } | |
f7e8917a | 1176 | spin_unlock(&ino->i_lock); |
193e3aa2 PT |
1177 | if (layoutreturn) { |
1178 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
27b6f539 | 1179 | pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, false); |
193e3aa2 | 1180 | } |
f7e8917a FI |
1181 | return found; |
1182 | } | |
1183 | ||
b1f69b75 AA |
1184 | /* |
1185 | * Compare two layout segments for sorting into layout cache. | |
1186 | * We want to preferentially return RW over RO layouts, so ensure those | |
1187 | * are seen first. | |
1188 | */ | |
1189 | static s64 | |
7dc0ac70 | 1190 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1191 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1192 | { |
fb3296eb BH |
1193 | s64 d; |
1194 | ||
1195 | /* high offset > low offset */ | |
1196 | d = l1->offset - l2->offset; | |
1197 | if (d) | |
1198 | return d; | |
1199 | ||
1200 | /* short length > long length */ | |
1201 | d = l2->length - l1->length; | |
1202 | if (d) | |
1203 | return d; | |
1204 | ||
b1f69b75 | 1205 | /* read > read/write */ |
fb3296eb | 1206 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1207 | } |
1208 | ||
974cec8c | 1209 | static void |
57036a37 | 1210 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
974cec8c AA |
1211 | struct pnfs_layout_segment *lseg) |
1212 | { | |
b1f69b75 | 1213 | struct pnfs_layout_segment *lp; |
b1f69b75 | 1214 | |
974cec8c AA |
1215 | dprintk("%s:Begin\n", __func__); |
1216 | ||
b7edfaa1 | 1217 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
7dc0ac70 | 1218 | if (pnfs_lseg_range_cmp(&lseg->pls_range, &lp->pls_range) > 0) |
b1f69b75 | 1219 | continue; |
566052c5 | 1220 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1221 | dprintk("%s: inserted lseg %p " |
1222 | "iomode %d offset %llu length %llu before " | |
1223 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1224 | __func__, lseg, lseg->pls_range.iomode, |
1225 | lseg->pls_range.offset, lseg->pls_range.length, | |
1226 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1227 | lp->pls_range.length); | |
fb3296eb | 1228 | goto out; |
974cec8c | 1229 | } |
fb3296eb BH |
1230 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1231 | dprintk("%s: inserted lseg %p " | |
1232 | "iomode %d offset %llu length %llu at tail\n", | |
1233 | __func__, lseg, lseg->pls_range.iomode, | |
1234 | lseg->pls_range.offset, lseg->pls_range.length); | |
1235 | out: | |
70c3bd2b | 1236 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1237 | |
1238 | dprintk("%s:Return\n", __func__); | |
e5e94017 BH |
1239 | } |
1240 | ||
1241 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1242 | alloc_init_layout_hdr(struct inode *ino, |
1243 | struct nfs_open_context *ctx, | |
1244 | gfp_t gfp_flags) | |
e5e94017 BH |
1245 | { |
1246 | struct pnfs_layout_hdr *lo; | |
1247 | ||
636fb9c8 | 1248 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1249 | if (!lo) |
1250 | return NULL; | |
cc6e5340 | 1251 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1252 | INIT_LIST_HEAD(&lo->plh_layouts); |
1253 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1254 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1255 | lo->plh_inode = ino; |
5cc2216d | 1256 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1257 | return lo; |
1258 | } | |
1259 | ||
1260 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1261 | pnfs_find_alloc_layout(struct inode *ino, |
1262 | struct nfs_open_context *ctx, | |
1263 | gfp_t gfp_flags) | |
e5e94017 BH |
1264 | { |
1265 | struct nfs_inode *nfsi = NFS_I(ino); | |
1266 | struct pnfs_layout_hdr *new = NULL; | |
1267 | ||
1268 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1269 | ||
251ec410 TM |
1270 | if (nfsi->layout != NULL) |
1271 | goto out_existing; | |
e5e94017 | 1272 | spin_unlock(&ino->i_lock); |
9fa40758 | 1273 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1274 | spin_lock(&ino->i_lock); |
1275 | ||
251ec410 | 1276 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1277 | nfsi->layout = new; |
251ec410 | 1278 | return new; |
7175fe90 YN |
1279 | } else if (new != NULL) |
1280 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1281 | out_existing: |
1282 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1283 | return nfsi->layout; |
1284 | } | |
1285 | ||
b1f69b75 AA |
1286 | /* |
1287 | * iomode matching rules: | |
1288 | * iomode lseg match | |
1289 | * ----- ----- ----- | |
1290 | * ANY READ true | |
1291 | * ANY RW true | |
1292 | * RW READ false | |
1293 | * RW RW true | |
1294 | * READ READ true | |
1295 | * READ RW true | |
1296 | */ | |
3cb2df17 | 1297 | static bool |
7dc0ac70 | 1298 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
3cb2df17 | 1299 | const struct pnfs_layout_range *range) |
b1f69b75 | 1300 | { |
fb3296eb BH |
1301 | struct pnfs_layout_range range1; |
1302 | ||
1303 | if ((range->iomode == IOMODE_RW && | |
1304 | ls_range->iomode != IOMODE_RW) || | |
7dc0ac70 | 1305 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1306 | return 0; |
1307 | ||
1308 | /* range1 covers only the first byte in the range */ | |
1309 | range1 = *range; | |
1310 | range1.length = 1; | |
7dc0ac70 | 1311 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1312 | } |
1313 | ||
1314 | /* | |
1315 | * lookup range in layout | |
1316 | */ | |
e5e94017 | 1317 | static struct pnfs_layout_segment * |
fb3296eb BH |
1318 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1319 | struct pnfs_layout_range *range) | |
e5e94017 | 1320 | { |
b1f69b75 AA |
1321 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1322 | ||
1323 | dprintk("%s:Begin\n", __func__); | |
1324 | ||
b7edfaa1 | 1325 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1326 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1327 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
7dc0ac70 | 1328 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
9369a431 | 1329 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1330 | break; |
1331 | } | |
d771e3a4 | 1332 | if (lseg->pls_range.offset > range->offset) |
b1f69b75 AA |
1333 | break; |
1334 | } | |
1335 | ||
1336 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1337 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1338 | return ret; |
e5e94017 BH |
1339 | } |
1340 | ||
d23d61c8 AA |
1341 | /* |
1342 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1343 | * to the MDS or over pNFS | |
1344 | * | |
1345 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1346 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1347 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1348 | * WRITE request. | |
1349 | * | |
1350 | * A return of true means use MDS I/O. | |
1351 | * | |
1352 | * From rfc 5661: | |
1353 | * If a file's size is smaller than the file size threshold, data accesses | |
1354 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1355 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1356 | * server. If both file size and I/O size are provided, the client SHOULD | |
1357 | * reach or exceed both thresholds before sending its read or write | |
1358 | * requests to the data server. | |
1359 | */ | |
1360 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1361 | struct inode *ino, int iomode) | |
1362 | { | |
1363 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1364 | struct nfs_inode *nfsi = NFS_I(ino); | |
1365 | loff_t fsize = i_size_read(ino); | |
1366 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1367 | ||
1368 | if (t == NULL) | |
1369 | return ret; | |
1370 | ||
1371 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1372 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1373 | ||
1374 | switch (iomode) { | |
1375 | case IOMODE_READ: | |
1376 | if (t->bm & THRESHOLD_RD) { | |
1377 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1378 | size_set = true; | |
1379 | if (fsize < t->rd_sz) | |
1380 | size = true; | |
1381 | } | |
1382 | if (t->bm & THRESHOLD_RD_IO) { | |
1383 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1384 | nfsi->read_io); | |
1385 | io_set = true; | |
1386 | if (nfsi->read_io < t->rd_io_sz) | |
1387 | io = true; | |
1388 | } | |
1389 | break; | |
1390 | case IOMODE_RW: | |
1391 | if (t->bm & THRESHOLD_WR) { | |
1392 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1393 | size_set = true; | |
1394 | if (fsize < t->wr_sz) | |
1395 | size = true; | |
1396 | } | |
1397 | if (t->bm & THRESHOLD_WR_IO) { | |
1398 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1399 | nfsi->write_io); | |
1400 | io_set = true; | |
1401 | if (nfsi->write_io < t->wr_io_sz) | |
1402 | io = true; | |
1403 | } | |
1404 | break; | |
1405 | } | |
1406 | if (size_set && io_set) { | |
1407 | if (size && io) | |
1408 | ret = true; | |
1409 | } else if (size || io) | |
1410 | ret = true; | |
1411 | ||
1412 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1413 | return ret; | |
1414 | } | |
1415 | ||
aa8a45ee PT |
1416 | /* stop waiting if someone clears NFS_LAYOUT_RETRY_LAYOUTGET bit. */ |
1417 | static int pnfs_layoutget_retry_bit_wait(struct wait_bit_key *key) | |
1418 | { | |
1419 | if (!test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, key->flags)) | |
1420 | return 1; | |
1421 | return nfs_wait_bit_killable(key); | |
1422 | } | |
1423 | ||
1424 | static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) | |
1425 | { | |
1426 | /* | |
1427 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1428 | * reference | |
1429 | */ | |
1430 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
1431 | return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
1432 | pnfs_layoutget_retry_bit_wait, | |
1433 | TASK_UNINTERRUPTIBLE); | |
1434 | } | |
1435 | ||
d67ae825 TH |
1436 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1437 | { | |
1438 | unsigned long *bitlock = &lo->plh_flags; | |
1439 | ||
1440 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1441 | smp_mb__after_atomic(); | |
1442 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1443 | } | |
1444 | ||
e5e94017 BH |
1445 | /* |
1446 | * Layout segment is retreived from the server if not cached. | |
1447 | * The appropriate layout segment is referenced and returned to the caller. | |
1448 | */ | |
7c24d948 | 1449 | struct pnfs_layout_segment * |
e5e94017 BH |
1450 | pnfs_update_layout(struct inode *ino, |
1451 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1452 | loff_t pos, |
1453 | u64 count, | |
a75b9df9 TM |
1454 | enum pnfs_iomode iomode, |
1455 | gfp_t gfp_flags) | |
e5e94017 | 1456 | { |
fb3296eb BH |
1457 | struct pnfs_layout_range arg = { |
1458 | .iomode = iomode, | |
1459 | .offset = pos, | |
1460 | .length = count, | |
1461 | }; | |
707ed5fd | 1462 | unsigned pg_offset; |
6382a441 WAA |
1463 | struct nfs_server *server = NFS_SERVER(ino); |
1464 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1465 | struct pnfs_layout_hdr *lo; |
1466 | struct pnfs_layout_segment *lseg = NULL; | |
30005121 | 1467 | bool first; |
e5e94017 BH |
1468 | |
1469 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) | |
f86bbcf8 | 1470 | goto out; |
d23d61c8 AA |
1471 | |
1472 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) | |
f86bbcf8 | 1473 | goto out; |
d23d61c8 | 1474 | |
9bf87482 PT |
1475 | lookup_again: |
1476 | first = false; | |
e5e94017 | 1477 | spin_lock(&ino->i_lock); |
9fa40758 | 1478 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1479 | if (lo == NULL) { |
1480 | spin_unlock(&ino->i_lock); | |
1481 | goto out; | |
1482 | } | |
e5e94017 | 1483 | |
43f1b3da | 1484 | /* Do we even need to bother with this? */ |
a59c30ac | 1485 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da | 1486 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1487 | goto out_unlock; |
1488 | } | |
1489 | ||
1490 | /* if LAYOUTGET already failed once we don't try again */ | |
aa8a45ee PT |
1491 | if (pnfs_layout_io_test_failed(lo, iomode) && |
1492 | !pnfs_should_retry_layoutget(lo)) | |
e5e94017 BH |
1493 | goto out_unlock; |
1494 | ||
9bf87482 PT |
1495 | first = list_empty(&lo->plh_segs); |
1496 | if (first) { | |
1497 | /* The first layoutget for the file. Need to serialize per | |
1498 | * RFC 5661 Errata 3208. | |
1499 | */ | |
1500 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1501 | &lo->plh_flags)) { | |
1502 | spin_unlock(&ino->i_lock); | |
1503 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1504 | TASK_UNINTERRUPTIBLE); | |
1505 | pnfs_put_layout_hdr(lo); | |
1506 | goto lookup_again; | |
1507 | } | |
1508 | } else { | |
1509 | /* Check to see if the layout for the given range | |
1510 | * already exists | |
1511 | */ | |
1512 | lseg = pnfs_find_lseg(lo, &arg); | |
1513 | if (lseg) | |
1514 | goto out_unlock; | |
1515 | } | |
568e8c49 | 1516 | |
aa8a45ee PT |
1517 | /* |
1518 | * Because we free lsegs before sending LAYOUTRETURN, we need to wait | |
1519 | * for LAYOUTRETURN even if first is true. | |
1520 | */ | |
1521 | if (!lseg && pnfs_should_retry_layoutget(lo) && | |
1522 | test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { | |
1523 | spin_unlock(&ino->i_lock); | |
1524 | dprintk("%s wait for layoutreturn\n", __func__); | |
1525 | if (pnfs_prepare_to_retry_layoutget(lo)) { | |
d67ae825 TH |
1526 | if (first) |
1527 | pnfs_clear_first_layoutget(lo); | |
aa8a45ee PT |
1528 | pnfs_put_layout_hdr(lo); |
1529 | dprintk("%s retrying\n", __func__); | |
1530 | goto lookup_again; | |
1531 | } | |
1532 | goto out_put_layout_hdr; | |
1533 | } | |
1534 | ||
ce6ab4f2 | 1535 | if (pnfs_layoutgets_blocked(lo, &arg, 0)) |
cf7d63f1 FI |
1536 | goto out_unlock; |
1537 | atomic_inc(&lo->plh_outstanding); | |
f49f9baa | 1538 | spin_unlock(&ino->i_lock); |
30005121 | 1539 | |
abb9a007 | 1540 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1541 | /* The lo must be on the clp list if there is any |
1542 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1543 | */ | |
1544 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1545 | if (list_empty(&lo->plh_layouts)) |
1546 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1547 | spin_unlock(&clp->cl_lock); |
1548 | } | |
e5e94017 | 1549 | |
707ed5fd BH |
1550 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1551 | if (pg_offset) { | |
1552 | arg.offset -= pg_offset; | |
1553 | arg.length += pg_offset; | |
1554 | } | |
7c24d948 AA |
1555 | if (arg.length != NFS4_MAX_UINT64) |
1556 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1557 | |
fb3296eb | 1558 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
c829013d | 1559 | pnfs_clear_retry_layoutget(lo); |
cf7d63f1 | 1560 | atomic_dec(&lo->plh_outstanding); |
830ffb56 | 1561 | out_put_layout_hdr: |
d67ae825 TH |
1562 | if (first) |
1563 | pnfs_clear_first_layoutget(lo); | |
70c3bd2b | 1564 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1565 | out: |
f86bbcf8 TM |
1566 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1567 | "(%s, offset: %llu, length: %llu)\n", | |
1568 | __func__, ino->i_sb->s_id, | |
1569 | (unsigned long long)NFS_FILEID(ino), | |
1570 | lseg == NULL ? "not found" : "found", | |
1571 | iomode==IOMODE_RW ? "read/write" : "read-only", | |
1572 | (unsigned long long)pos, | |
1573 | (unsigned long long)count); | |
e5e94017 BH |
1574 | return lseg; |
1575 | out_unlock: | |
1576 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1577 | goto out_put_layout_hdr; |
e5e94017 | 1578 | } |
7c24d948 | 1579 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1580 | |
a0b0a6e3 | 1581 | struct pnfs_layout_segment * |
b1f69b75 AA |
1582 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1583 | { | |
1584 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1585 | struct nfs4_layoutget_res *res = &lgp->res; | |
1586 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1587 | struct inode *ino = lo->plh_inode; |
78096cca | 1588 | LIST_HEAD(free_me); |
b1f69b75 AA |
1589 | int status = 0; |
1590 | ||
1591 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1592 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1593 | if (!lseg || IS_ERR(lseg)) { |
1594 | if (!lseg) | |
1595 | status = -ENOMEM; | |
1596 | else | |
1597 | status = PTR_ERR(lseg); | |
1598 | dprintk("%s: Could not allocate layout: error %d\n", | |
1599 | __func__, status); | |
1600 | goto out; | |
1601 | } | |
1602 | ||
1013df61 CH |
1603 | init_lseg(lo, lseg); |
1604 | lseg->pls_range = res->range; | |
1605 | ||
b1f69b75 | 1606 | spin_lock(&ino->i_lock); |
a59c30ac | 1607 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
43f1b3da FI |
1608 | dprintk("%s forget reply due to recall\n", __func__); |
1609 | goto out_forget_reply; | |
1610 | } | |
1611 | ||
ce6ab4f2 | 1612 | if (pnfs_layoutgets_blocked(lo, &lgp->args.range, 1)) { |
43f1b3da FI |
1613 | dprintk("%s forget reply due to state\n", __func__); |
1614 | goto out_forget_reply; | |
1615 | } | |
038d6493 | 1616 | |
362f7474 CH |
1617 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1618 | /* existing state ID, make sure the sequence number matches. */ | |
1619 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1620 | dprintk("%s forget reply due to sequence\n", __func__); | |
1621 | goto out_forget_reply; | |
1622 | } | |
1623 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1624 | } else { | |
1625 | /* | |
1626 | * We got an entirely new state ID. Mark all segments for the | |
1627 | * inode invalid, and don't bother validating the stateid | |
1628 | * sequence number. | |
1629 | */ | |
1630 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); | |
1631 | ||
1632 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1633 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1634 | } | |
038d6493 | 1635 | |
47abadef CH |
1636 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
1637 | ||
9369a431 | 1638 | pnfs_get_lseg(lseg); |
57036a37 | 1639 | pnfs_layout_insert_lseg(lo, lseg); |
b1f69b75 | 1640 | |
f7e8917a FI |
1641 | if (res->return_on_close) { |
1642 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
1643 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); | |
1644 | } | |
1645 | ||
b1f69b75 | 1646 | spin_unlock(&ino->i_lock); |
78096cca | 1647 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1648 | return lseg; |
b1f69b75 | 1649 | out: |
a0b0a6e3 | 1650 | return ERR_PTR(status); |
43f1b3da FI |
1651 | |
1652 | out_forget_reply: | |
1653 | spin_unlock(&ino->i_lock); | |
1654 | lseg->pls_layout = lo; | |
1655 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1656 | goto out; | |
b1f69b75 AA |
1657 | } |
1658 | ||
016256df PT |
1659 | static void |
1660 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, | |
1661 | struct list_head *tmp_list, | |
1662 | struct pnfs_layout_range *return_range) | |
1663 | { | |
1664 | struct pnfs_layout_segment *lseg, *next; | |
1665 | ||
1666 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
1667 | ||
1668 | if (list_empty(&lo->plh_segs)) | |
1669 | return; | |
1670 | ||
1671 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
1672 | if (should_free_lseg(&lseg->pls_range, return_range)) { | |
1673 | dprintk("%s: marking lseg %p iomode %d " | |
1674 | "offset %llu length %llu\n", __func__, | |
1675 | lseg, lseg->pls_range.iomode, | |
1676 | lseg->pls_range.offset, | |
1677 | lseg->pls_range.length); | |
1678 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
1679 | mark_lseg_invalid(lseg, tmp_list); | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
1684 | struct pnfs_layout_segment *lseg) | |
1685 | { | |
1686 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
1687 | int iomode = pnfs_iomode_to_fail_bit(lseg->pls_range.iomode); | |
1688 | struct pnfs_layout_range range = { | |
1689 | .iomode = lseg->pls_range.iomode, | |
1690 | .offset = 0, | |
1691 | .length = NFS4_MAX_UINT64, | |
1692 | }; | |
1693 | LIST_HEAD(free_me); | |
1694 | ||
1695 | spin_lock(&inode->i_lock); | |
1696 | /* set failure bit so that pnfs path will be retried later */ | |
1697 | pnfs_layout_set_fail_bit(lo, iomode); | |
1698 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
1699 | if (lo->plh_return_iomode == 0) | |
1700 | lo->plh_return_iomode = range.iomode; | |
1701 | else if (lo->plh_return_iomode != range.iomode) | |
1702 | lo->plh_return_iomode = IOMODE_ANY; | |
1703 | /* | |
1704 | * mark all matching lsegs so that we are sure to have no live | |
1705 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
1706 | * for how it works. | |
1707 | */ | |
1708 | pnfs_mark_matching_lsegs_return(lo, &free_me, &range); | |
1709 | spin_unlock(&inode->i_lock); | |
1710 | pnfs_free_lseg_list(&free_me); | |
1711 | } | |
1712 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
1713 | ||
d8007d4d TM |
1714 | void |
1715 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1716 | { | |
1fd937bd PT |
1717 | u64 rd_size = req->wb_bytes; |
1718 | ||
cb5d04bc PT |
1719 | if (pgio->pg_lseg == NULL) { |
1720 | if (pgio->pg_dreq == NULL) | |
1721 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1722 | else | |
1723 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1724 | ||
1725 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1726 | req->wb_context, | |
1727 | req_offset(req), | |
1728 | rd_size, | |
1729 | IOMODE_READ, | |
1730 | GFP_KERNEL); | |
1731 | } | |
e885de1a TM |
1732 | /* If no lseg, fall back to read through mds */ |
1733 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1734 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1735 | |
d8007d4d TM |
1736 | } |
1737 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1738 | ||
1739 | void | |
6296556f PT |
1740 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1741 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1742 | { |
cb5d04bc PT |
1743 | if (pgio->pg_lseg == NULL) |
1744 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1745 | req->wb_context, | |
1746 | req_offset(req), | |
1747 | wb_size, | |
1748 | IOMODE_RW, | |
1749 | GFP_NOFS); | |
e885de1a TM |
1750 | /* If no lseg, fall back to write through mds */ |
1751 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1752 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1753 | } |
1754 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1755 | ||
180bb5ec WAA |
1756 | void |
1757 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
1758 | { | |
1759 | if (desc->pg_lseg) { | |
1760 | pnfs_put_lseg(desc->pg_lseg); | |
1761 | desc->pg_lseg = NULL; | |
1762 | } | |
1763 | } | |
1764 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
1765 | ||
b4fdac1a WAA |
1766 | /* |
1767 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1768 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1769 | */ | |
1770 | size_t | |
a7d42ddb WAA |
1771 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
1772 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 1773 | { |
0f9c429e | 1774 | unsigned int size; |
c5e20cb7 | 1775 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1776 | |
1777 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1778 | if (!size) |
1779 | return 0; | |
94ad1c80 | 1780 | |
19982ba8 | 1781 | /* |
c5e20cb7 WAA |
1782 | * 'size' contains the number of bytes left in the current page (up |
1783 | * to the original size asked for in @req->wb_bytes). | |
1784 | * | |
1785 | * Calculate how many bytes are left in the layout segment | |
1786 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1787 | * |
1788 | * Please also note that 'end_offset' is actually the offset of the | |
1789 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1790 | * | |
1791 | */ | |
19b54848 | 1792 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
1793 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
1794 | pgio->pg_lseg->pls_range.length); | |
1795 | req_start = req_offset(req); | |
7c13789e | 1796 | WARN_ON_ONCE(req_start >= seg_end); |
c5e20cb7 | 1797 | /* start of request is past the last byte of this segment */ |
7c13789e WAA |
1798 | if (req_start >= seg_end) { |
1799 | /* reference the new lseg */ | |
1800 | if (pgio->pg_ops->pg_cleanup) | |
1801 | pgio->pg_ops->pg_cleanup(pgio); | |
1802 | if (pgio->pg_ops->pg_init) | |
1803 | pgio->pg_ops->pg_init(pgio, req); | |
19b54848 | 1804 | return 0; |
7c13789e | 1805 | } |
c5e20cb7 WAA |
1806 | |
1807 | /* adjust 'size' iff there are fewer bytes left in the | |
1808 | * segment than what nfs_generic_pg_test returned */ | |
1809 | seg_left = seg_end - req_start; | |
1810 | if (seg_left < size) | |
1811 | size = (unsigned int)seg_left; | |
19b54848 | 1812 | } |
0f9c429e | 1813 | |
19b54848 | 1814 | return size; |
94ad1c80 | 1815 | } |
89a58e32 | 1816 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1817 | |
53113ad3 | 1818 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
1819 | { |
1820 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
1821 | |
1822 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
1823 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
1824 | hdr->completion_ops); | |
c7070113 | 1825 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 1826 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 1827 | } |
e7dd79af | 1828 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1829 | |
d45f60c6 | 1830 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1831 | { |
cd841605 FI |
1832 | |
1833 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1834 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1835 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1836 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1837 | } |
6c75dc0d | 1838 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1839 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
1840 | } |
1841 | ||
d20581aa BH |
1842 | /* |
1843 | * Called by non rpc-based layout drivers | |
1844 | */ | |
d45f60c6 | 1845 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 1846 | { |
d45f60c6 | 1847 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); |
cd841605 | 1848 | if (!hdr->pnfs_error) { |
67af7611 TM |
1849 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
1850 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 1851 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
1acbbb4e | 1852 | } else |
d45f60c6 WAA |
1853 | pnfs_ld_handle_write_error(hdr); |
1854 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 1855 | } |
d20581aa | 1856 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1857 | |
dce81290 TM |
1858 | static void |
1859 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1860 | struct nfs_pgio_header *hdr) |
dce81290 | 1861 | { |
48d635f1 | 1862 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1863 | |
6c75dc0d | 1864 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1865 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 1866 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 1867 | mirror->pg_recoalesce = 1; |
6c75dc0d | 1868 | } |
d45f60c6 | 1869 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 1870 | hdr->release(hdr); |
dce81290 TM |
1871 | } |
1872 | ||
1873 | static enum pnfs_try_status | |
d45f60c6 | 1874 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
1875 | const struct rpc_call_ops *call_ops, |
1876 | struct pnfs_layout_segment *lseg, | |
1877 | int how) | |
0382b744 | 1878 | { |
cd841605 | 1879 | struct inode *inode = hdr->inode; |
0382b744 AA |
1880 | enum pnfs_try_status trypnfs; |
1881 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1882 | ||
cd841605 | 1883 | hdr->mds_ops = call_ops; |
0382b744 AA |
1884 | |
1885 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
1886 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
1887 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 1888 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 1889 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
1890 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
1891 | return trypnfs; | |
1892 | } | |
1893 | ||
dce81290 | 1894 | static void |
7f714720 WAA |
1895 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
1896 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 1897 | { |
dce81290 TM |
1898 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
1899 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 1900 | enum pnfs_try_status trypnfs; |
dce81290 | 1901 | |
d45f60c6 | 1902 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 1903 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 1904 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
1905 | } |
1906 | ||
6c75dc0d FI |
1907 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
1908 | { | |
9369a431 | 1909 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 1910 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
1911 | } |
1912 | ||
dce81290 TM |
1913 | int |
1914 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
1915 | { | |
48d635f1 | 1916 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1917 | |
6c75dc0d | 1918 | struct nfs_pgio_header *hdr; |
dce81290 TM |
1919 | int ret; |
1920 | ||
1e7f3a48 WAA |
1921 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
1922 | if (!hdr) { | |
a7d42ddb | 1923 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
6c75dc0d | 1924 | return -ENOMEM; |
dce81290 | 1925 | } |
6c75dc0d | 1926 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 1927 | |
9369a431 | 1928 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 1929 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 1930 | if (!ret) |
7f714720 | 1931 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 1932 | |
6c75dc0d | 1933 | return ret; |
dce81290 TM |
1934 | } |
1935 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
1936 | ||
53113ad3 | 1937 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
1938 | { |
1939 | struct nfs_pageio_descriptor pgio; | |
1940 | ||
1acbbb4e | 1941 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
1942 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
1943 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 1944 | } |
e7dd79af | 1945 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 1946 | |
d45f60c6 | 1947 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1948 | { |
cd841605 FI |
1949 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
1950 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1951 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1952 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1953 | } |
4db6e0b7 | 1954 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1955 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
1956 | } |
1957 | ||
d20581aa BH |
1958 | /* |
1959 | * Called by non rpc-based layout drivers | |
1960 | */ | |
d45f60c6 | 1961 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 1962 | { |
d45f60c6 | 1963 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
cd841605 | 1964 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
1965 | __nfs4_read_done_cb(hdr); |
1966 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
62e4a769 | 1967 | } else |
d45f60c6 WAA |
1968 | pnfs_ld_handle_read_error(hdr); |
1969 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
1970 | } |
1971 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
1972 | ||
493292dd TM |
1973 | static void |
1974 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1975 | struct nfs_pgio_header *hdr) |
493292dd | 1976 | { |
48d635f1 | 1977 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1978 | |
4db6e0b7 | 1979 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1980 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 1981 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 1982 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 1983 | } |
d45f60c6 | 1984 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 1985 | hdr->release(hdr); |
493292dd TM |
1986 | } |
1987 | ||
64419a9b AA |
1988 | /* |
1989 | * Call the appropriate parallel I/O subsystem read function. | |
1990 | */ | |
493292dd | 1991 | static enum pnfs_try_status |
d45f60c6 | 1992 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
1993 | const struct rpc_call_ops *call_ops, |
1994 | struct pnfs_layout_segment *lseg) | |
64419a9b | 1995 | { |
cd841605 | 1996 | struct inode *inode = hdr->inode; |
64419a9b AA |
1997 | struct nfs_server *nfss = NFS_SERVER(inode); |
1998 | enum pnfs_try_status trypnfs; | |
1999 | ||
cd841605 | 2000 | hdr->mds_ops = call_ops; |
64419a9b AA |
2001 | |
2002 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2003 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2004 | |
d45f60c6 | 2005 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2006 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2007 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2008 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2009 | return trypnfs; | |
2010 | } | |
863a3c6c | 2011 | |
ceb11e13 PT |
2012 | /* Resend all requests through pnfs. */ |
2013 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) | |
2014 | { | |
2015 | struct nfs_pageio_descriptor pgio; | |
2016 | ||
2017 | nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); | |
2018 | return nfs_pageio_resend(&pgio, hdr); | |
2019 | } | |
2020 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2021 | ||
493292dd | 2022 | static void |
7f714720 | 2023 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2024 | { |
493292dd TM |
2025 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2026 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2027 | enum pnfs_try_status trypnfs; |
ceb11e13 | 2028 | int err = 0; |
493292dd | 2029 | |
d45f60c6 | 2030 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 PT |
2031 | if (trypnfs == PNFS_TRY_AGAIN) |
2032 | err = pnfs_read_resend_pnfs(hdr); | |
2033 | if (trypnfs == PNFS_NOT_ATTEMPTED || err) | |
d45f60c6 | 2034 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
2035 | } |
2036 | ||
4db6e0b7 FI |
2037 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
2038 | { | |
9369a431 | 2039 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2040 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
2041 | } |
2042 | ||
493292dd TM |
2043 | int |
2044 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
2045 | { | |
48d635f1 | 2046 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2047 | |
4db6e0b7 | 2048 | struct nfs_pgio_header *hdr; |
493292dd TM |
2049 | int ret; |
2050 | ||
1e7f3a48 WAA |
2051 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2052 | if (!hdr) { | |
a7d42ddb | 2053 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
180bb5ec | 2054 | return -ENOMEM; |
493292dd | 2055 | } |
4db6e0b7 | 2056 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 2057 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2058 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2059 | if (!ret) |
7f714720 | 2060 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 2061 | return ret; |
493292dd TM |
2062 | } |
2063 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
2064 | ||
71244d9b TM |
2065 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
2066 | { | |
2067 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
2068 | ||
2069 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 2070 | smp_mb__after_atomic(); |
71244d9b TM |
2071 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
2072 | } | |
2073 | ||
863a3c6c | 2074 | /* |
a9bae566 | 2075 | * There can be multiple RW segments. |
863a3c6c | 2076 | */ |
a9bae566 | 2077 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 2078 | { |
a9bae566 | 2079 | struct pnfs_layout_segment *lseg; |
863a3c6c | 2080 | |
a9bae566 PT |
2081 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
2082 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 2083 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
2084 | list_add(&lseg->pls_lc_list, listp); |
2085 | } | |
863a3c6c AA |
2086 | } |
2087 | ||
a073dbff TM |
2088 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
2089 | { | |
2090 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
2091 | |
2092 | /* Matched by references in pnfs_set_layoutcommit */ | |
2093 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
2094 | list_del_init(&lseg->pls_lc_list); | |
2095 | pnfs_put_lseg(lseg); | |
2096 | } | |
2097 | ||
71244d9b | 2098 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
2099 | } |
2100 | ||
1b0ae068 PT |
2101 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
2102 | { | |
b9e028fd | 2103 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
2104 | } |
2105 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
2106 | ||
863a3c6c | 2107 | void |
67af7611 TM |
2108 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
2109 | loff_t end_pos) | |
863a3c6c | 2110 | { |
cd841605 | 2111 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 2112 | bool mark_as_dirty = false; |
863a3c6c | 2113 | |
cd841605 | 2114 | spin_lock(&inode->i_lock); |
863a3c6c | 2115 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 2116 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 2117 | mark_as_dirty = true; |
863a3c6c | 2118 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 2119 | __func__, inode->i_ino); |
29559b11 TM |
2120 | } else if (end_pos > nfsi->layout->plh_lwb) |
2121 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 2122 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 2123 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 2124 | pnfs_get_lseg(lseg); |
a9bae566 | 2125 | } |
cd841605 | 2126 | spin_unlock(&inode->i_lock); |
acff5880 | 2127 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 2128 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2129 | |
2130 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2131 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2132 | if (mark_as_dirty) | |
cd841605 | 2133 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2134 | } |
2135 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2136 | ||
db29c089 AA |
2137 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2138 | { | |
2139 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2140 | ||
2141 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2142 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2143 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2144 | } |
2145 | ||
de4b15c7 AA |
2146 | /* |
2147 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2148 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2149 | * data to disk to allow the server to recover the data if it crashes. | |
2150 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2151 | * is off, and a COMMIT is sent to a data server, or | |
2152 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2153 | */ | |
863a3c6c | 2154 | int |
ef311537 | 2155 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2156 | { |
5f919c9f | 2157 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2158 | struct nfs4_layoutcommit_data *data; |
2159 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2160 | loff_t end_pos; |
71244d9b | 2161 | int status; |
863a3c6c | 2162 | |
71244d9b | 2163 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2164 | return 0; |
2165 | ||
71244d9b | 2166 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2167 | |
71244d9b | 2168 | status = -EAGAIN; |
92407e75 | 2169 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2170 | if (!sync) |
2171 | goto out; | |
74316201 | 2172 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2173 | NFS_INO_LAYOUTCOMMITTING, |
2174 | nfs_wait_bit_killable, | |
2175 | TASK_KILLABLE); | |
92407e75 | 2176 | if (status) |
71244d9b | 2177 | goto out; |
92407e75 PT |
2178 | } |
2179 | ||
71244d9b TM |
2180 | status = -ENOMEM; |
2181 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2182 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2183 | if (!data) | |
2184 | goto clear_layoutcommitting; | |
2185 | ||
2186 | status = 0; | |
de4b15c7 | 2187 | spin_lock(&inode->i_lock); |
71244d9b TM |
2188 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2189 | goto out_unlock; | |
a9bae566 | 2190 | |
71244d9b | 2191 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2192 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2193 | |
acff5880 | 2194 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 2195 | |
f597c537 | 2196 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2197 | spin_unlock(&inode->i_lock); |
2198 | ||
2199 | data->args.inode = inode; | |
9fa40758 | 2200 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2201 | nfs_fattr_init(&data->fattr); |
2202 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2203 | data->res.fattr = &data->fattr; | |
2204 | data->args.lastbytewritten = end_pos - 1; | |
2205 | data->res.server = NFS_SERVER(inode); | |
2206 | ||
5f919c9f CH |
2207 | if (ld->prepare_layoutcommit) { |
2208 | status = ld->prepare_layoutcommit(&data->args); | |
2209 | if (status) { | |
2210 | spin_lock(&inode->i_lock); | |
29559b11 TM |
2211 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
2212 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f CH |
2213 | nfsi->layout->plh_lwb = end_pos; |
2214 | spin_unlock(&inode->i_lock); | |
2215 | put_rpccred(data->cred); | |
5f919c9f CH |
2216 | goto clear_layoutcommitting; |
2217 | } | |
2218 | } | |
2219 | ||
2220 | ||
863a3c6c AA |
2221 | status = nfs4_proc_layoutcommit(data, sync); |
2222 | out: | |
92407e75 PT |
2223 | if (status) |
2224 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2225 | dprintk("<-- %s status %d\n", __func__, status); |
2226 | return status; | |
71244d9b TM |
2227 | out_unlock: |
2228 | spin_unlock(&inode->i_lock); | |
92407e75 | 2229 | kfree(data); |
71244d9b TM |
2230 | clear_layoutcommitting: |
2231 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2232 | goto out; |
863a3c6c | 2233 | } |
72cff449 | 2234 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 2235 | |
5bb89b47 TM |
2236 | int |
2237 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
2238 | { | |
2239 | return pnfs_layoutcommit_inode(inode, true); | |
2240 | } | |
2241 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
2242 | ||
82be417a AA |
2243 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
2244 | { | |
2245 | struct nfs4_threshold *thp; | |
2246 | ||
2247 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2248 | if (!thp) { | |
2249 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2250 | return NULL; | |
2251 | } | |
2252 | return thp; | |
2253 | } | |
8733408d | 2254 | |
865a7ecb | 2255 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d PT |
2256 | int |
2257 | pnfs_report_layoutstat(struct inode *inode) | |
2258 | { | |
2259 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
2260 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 2261 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
2262 | struct nfs42_layoutstat_data *data; |
2263 | struct pnfs_layout_hdr *hdr; | |
2264 | int status = 0; | |
2265 | ||
2266 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
2267 | goto out; | |
2268 | ||
1bfe3b25 PT |
2269 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
2270 | goto out; | |
2271 | ||
8733408d PT |
2272 | spin_lock(&inode->i_lock); |
2273 | if (!NFS_I(inode)->layout) { | |
2274 | spin_unlock(&inode->i_lock); | |
2275 | goto out; | |
2276 | } | |
2277 | hdr = NFS_I(inode)->layout; | |
2278 | pnfs_get_layout_hdr(hdr); | |
2279 | spin_unlock(&inode->i_lock); | |
2280 | ||
2281 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2282 | if (!data) { | |
2283 | status = -ENOMEM; | |
2284 | goto out_put; | |
2285 | } | |
2286 | ||
2287 | data->args.fh = NFS_FH(inode); | |
2288 | data->args.inode = inode; | |
2289 | nfs4_stateid_copy(&data->args.stateid, &hdr->plh_stateid); | |
2290 | status = ld->prepare_layoutstats(&data->args); | |
2291 | if (status) | |
2292 | goto out_free; | |
2293 | ||
2294 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
2295 | ||
2296 | out: | |
2297 | dprintk("%s returns %d\n", __func__, status); | |
2298 | return status; | |
2299 | ||
2300 | out_free: | |
2301 | kfree(data); | |
2302 | out_put: | |
2303 | pnfs_put_layout_hdr(hdr); | |
1bfe3b25 PT |
2304 | smp_mb__before_atomic(); |
2305 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
2306 | smp_mb__after_atomic(); | |
8733408d PT |
2307 | goto out; |
2308 | } | |
2309 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 2310 | #endif |