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 | */ | |
5f46be04 | 262 | 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); | |
6d597e17 | 273 | return pnfs_mark_matching_lsegs_invalid(lo, lseg_list, &range, 0); |
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)); | |
6d597e17 | 311 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range, 0); |
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); | |
2d148c7e TM |
364 | if (list_empty(&lo->plh_segs)) { |
365 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
173f77e9 | 366 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
2d148c7e | 367 | } |
d684d2ae FI |
368 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
369 | } | |
370 | ||
bae724ef | 371 | void |
9369a431 | 372 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 373 | { |
57036a37 | 374 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
375 | struct inode *inode; |
376 | ||
377 | if (!lseg) | |
378 | return; | |
379 | ||
4541d16c FI |
380 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
381 | atomic_read(&lseg->pls_refcount), | |
382 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
4ef2e4f8 | 383 | |
57036a37 TM |
384 | lo = lseg->pls_layout; |
385 | inode = lo->plh_inode; | |
4ef2e4f8 | 386 | |
d684d2ae | 387 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
faa4a54f TM |
388 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
389 | spin_unlock(&inode->i_lock); | |
390 | return; | |
391 | } | |
8f0d27dc | 392 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 TM |
393 | pnfs_layout_remove_lseg(lo, lseg); |
394 | spin_unlock(&inode->i_lock); | |
395 | pnfs_free_lseg(lseg); | |
396 | pnfs_put_layout_hdr(lo); | |
4541d16c | 397 | } |
4541d16c | 398 | } |
9369a431 | 399 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 400 | |
6543f803 | 401 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
402 | { |
403 | struct pnfs_layout_segment *lseg; | |
6543f803 | 404 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
405 | |
406 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 407 | lo = lseg->pls_layout; |
e6cf82d1 | 408 | |
6543f803 TM |
409 | pnfs_free_lseg(lseg); |
410 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
411 | } |
412 | ||
6543f803 | 413 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 414 | { |
6543f803 | 415 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
416 | schedule_work(&lseg->pls_work); |
417 | } | |
6543f803 TM |
418 | |
419 | void | |
420 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
421 | { | |
422 | if (!lseg) | |
423 | return; | |
424 | ||
425 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
426 | ||
427 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
428 | atomic_read(&lseg->pls_refcount), | |
429 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
430 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
431 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
faa4a54f TM |
432 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) |
433 | return; | |
6543f803 TM |
434 | pnfs_get_layout_hdr(lo); |
435 | pnfs_layout_remove_lseg(lo, lseg); | |
436 | pnfs_free_lseg_async(lseg); | |
437 | } | |
438 | } | |
439 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 440 | |
3cb2df17 | 441 | static u64 |
fb3296eb BH |
442 | end_offset(u64 start, u64 len) |
443 | { | |
444 | u64 end; | |
445 | ||
446 | end = start + len; | |
447 | return end >= start ? end : NFS4_MAX_UINT64; | |
448 | } | |
449 | ||
fb3296eb BH |
450 | /* |
451 | * is l2 fully contained in l1? | |
452 | * start1 end1 | |
453 | * [----------------------------------) | |
454 | * start2 end2 | |
455 | * [----------------) | |
456 | */ | |
3cb2df17 | 457 | static bool |
7dc0ac70 | 458 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 459 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
460 | { |
461 | u64 start1 = l1->offset; | |
462 | u64 end1 = end_offset(start1, l1->length); | |
463 | u64 start2 = l2->offset; | |
464 | u64 end2 = end_offset(start2, l2->length); | |
465 | ||
466 | return (start1 <= start2) && (end1 >= end2); | |
467 | } | |
468 | ||
469 | /* | |
470 | * is l1 and l2 intersecting? | |
471 | * start1 end1 | |
472 | * [----------------------------------) | |
473 | * start2 end2 | |
474 | * [----------------) | |
475 | */ | |
3cb2df17 | 476 | static bool |
7dc0ac70 | 477 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 478 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
479 | { |
480 | u64 start1 = l1->offset; | |
481 | u64 end1 = end_offset(start1, l1->length); | |
482 | u64 start2 = l2->offset; | |
483 | u64 end2 = end_offset(start2, l2->length); | |
484 | ||
485 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
486 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
487 | } | |
488 | ||
24956804 TM |
489 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
490 | struct list_head *tmp_list) | |
491 | { | |
492 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
493 | return false; | |
494 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
495 | list_add(&lseg->pls_list, tmp_list); | |
496 | return true; | |
497 | } | |
498 | ||
4541d16c FI |
499 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
500 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
501 | struct list_head *tmp_list) | |
502 | { | |
503 | int rv = 0; | |
504 | ||
505 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
506 | /* Remove the reference keeping the lseg in the | |
507 | * list. It will now be removed when all | |
508 | * outstanding io is finished. | |
509 | */ | |
d684d2ae FI |
510 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
511 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 512 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 513 | rv = 1; |
4541d16c FI |
514 | } |
515 | return rv; | |
516 | } | |
517 | ||
6d597e17 JL |
518 | /* |
519 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
520 | * taking into account wraparound issues. | |
521 | */ | |
522 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
523 | { | |
524 | return (s32)(s1 - s2) > 0; | |
525 | } | |
526 | ||
e036f464 TM |
527 | static bool |
528 | pnfs_should_free_range(const struct pnfs_layout_range *lseg_range, | |
529 | const struct pnfs_layout_range *recall_range) | |
530 | { | |
531 | return (recall_range->iomode == IOMODE_ANY || | |
532 | lseg_range->iomode == recall_range->iomode) && | |
533 | pnfs_lseg_range_intersecting(lseg_range, recall_range); | |
534 | } | |
535 | ||
536 | static bool | |
537 | pnfs_match_lseg_recall(const struct pnfs_layout_segment *lseg, | |
538 | const struct pnfs_layout_range *recall_range, | |
539 | u32 seq) | |
540 | { | |
541 | if (seq != 0 && pnfs_seqid_is_newer(lseg->pls_seq, seq)) | |
542 | return false; | |
543 | if (recall_range == NULL) | |
544 | return true; | |
545 | return pnfs_should_free_range(&lseg->pls_range, recall_range); | |
546 | } | |
547 | ||
6d597e17 JL |
548 | /** |
549 | * pnfs_mark_matching_lsegs_invalid - tear down lsegs or mark them for later | |
550 | * @lo: layout header containing the lsegs | |
551 | * @tmp_list: list head where doomed lsegs should go | |
552 | * @recall_range: optional recall range argument to match (may be NULL) | |
553 | * @seq: only invalidate lsegs obtained prior to this sequence (may be 0) | |
554 | * | |
555 | * Walk the list of lsegs in the layout header, and tear down any that should | |
556 | * be destroyed. If "recall_range" is specified then the segment must match | |
557 | * that range. If "seq" is non-zero, then only match segments that were handed | |
558 | * out at or before that sequence. | |
559 | * | |
560 | * Returns number of matching invalid lsegs remaining in list after scanning | |
561 | * it and purging them. | |
4541d16c | 562 | */ |
43f1b3da | 563 | int |
49a85061 | 564 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 565 | struct list_head *tmp_list, |
6d597e17 JL |
566 | const struct pnfs_layout_range *recall_range, |
567 | u32 seq) | |
974cec8c AA |
568 | { |
569 | struct pnfs_layout_segment *lseg, *next; | |
71b39854 | 570 | int remaining = 0; |
974cec8c AA |
571 | |
572 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
573 | ||
8006bfba | 574 | if (list_empty(&lo->plh_segs)) |
38511722 | 575 | return 0; |
4541d16c | 576 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
e036f464 | 577 | if (pnfs_match_lseg_recall(lseg, recall_range, seq)) { |
6d597e17 | 578 | dprintk("%s: freeing lseg %p iomode %d seq %u" |
4541d16c | 579 | "offset %llu length %llu\n", __func__, |
6d597e17 JL |
580 | lseg, lseg->pls_range.iomode, lseg->pls_seq, |
581 | lseg->pls_range.offset, lseg->pls_range.length); | |
71b39854 TM |
582 | if (!mark_lseg_invalid(lseg, tmp_list)) |
583 | remaining++; | |
4541d16c | 584 | } |
71b39854 TM |
585 | dprintk("%s:Return %i\n", __func__, remaining); |
586 | return remaining; | |
974cec8c AA |
587 | } |
588 | ||
f49f9baa | 589 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 590 | void |
4541d16c | 591 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 592 | { |
4541d16c | 593 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
594 | |
595 | if (list_empty(free_me)) | |
596 | return; | |
597 | ||
4541d16c | 598 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 599 | list_del(&lseg->pls_list); |
905ca191 | 600 | pnfs_free_lseg(lseg); |
974cec8c AA |
601 | } |
602 | } | |
603 | ||
e5e94017 BH |
604 | void |
605 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
606 | { | |
607 | struct pnfs_layout_hdr *lo; | |
974cec8c | 608 | LIST_HEAD(tmp_list); |
e5e94017 BH |
609 | |
610 | spin_lock(&nfsi->vfs_inode.i_lock); | |
611 | lo = nfsi->layout; | |
612 | if (lo) { | |
3e621214 | 613 | pnfs_get_layout_hdr(lo); |
2454dfea | 614 | pnfs_mark_layout_stateid_invalid(lo, &tmp_list); |
3e621214 TM |
615 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
616 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
617 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
618 | pnfs_free_lseg_list(&tmp_list); | |
619 | pnfs_put_layout_hdr(lo); | |
620 | } else | |
621 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 622 | } |
041245c8 | 623 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 624 | |
fd9a8d71 TM |
625 | static bool |
626 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
627 | struct list_head *layout_list) | |
974cec8c AA |
628 | { |
629 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 630 | bool ret = false; |
974cec8c | 631 | |
fd9a8d71 TM |
632 | spin_lock(&inode->i_lock); |
633 | lo = NFS_I(inode)->layout; | |
634 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
635 | pnfs_get_layout_hdr(lo); | |
636 | list_add(&lo->plh_bulk_destroy, layout_list); | |
637 | ret = true; | |
638 | } | |
639 | spin_unlock(&inode->i_lock); | |
640 | return ret; | |
641 | } | |
642 | ||
643 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
644 | static int | |
645 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
646 | struct nfs_server *server, | |
647 | struct list_head *layout_list) | |
648 | { | |
649 | struct pnfs_layout_hdr *lo, *next; | |
650 | struct inode *inode; | |
651 | ||
652 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
653 | inode = igrab(lo->plh_inode); | |
654 | if (inode == NULL) | |
655 | continue; | |
656 | list_del_init(&lo->plh_layouts); | |
657 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
658 | continue; | |
659 | rcu_read_unlock(); | |
660 | spin_unlock(&clp->cl_lock); | |
661 | iput(inode); | |
662 | spin_lock(&clp->cl_lock); | |
663 | rcu_read_lock(); | |
664 | return -EAGAIN; | |
665 | } | |
666 | return 0; | |
667 | } | |
668 | ||
669 | static int | |
670 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
671 | bool is_bulk_recall) | |
672 | { | |
673 | struct pnfs_layout_hdr *lo; | |
674 | struct inode *inode; | |
fd9a8d71 TM |
675 | LIST_HEAD(lseg_list); |
676 | int ret = 0; | |
677 | ||
678 | while (!list_empty(layout_list)) { | |
679 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
680 | plh_bulk_destroy); | |
681 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
682 | lo->plh_inode->i_ino); | |
683 | inode = lo->plh_inode; | |
7c5d1875 CH |
684 | |
685 | pnfs_layoutcommit_inode(inode, false); | |
686 | ||
fd9a8d71 TM |
687 | spin_lock(&inode->i_lock); |
688 | list_del_init(&lo->plh_bulk_destroy); | |
9fd4b9fc TM |
689 | if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) { |
690 | if (is_bulk_recall) | |
691 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
fd9a8d71 | 692 | ret = -EAGAIN; |
9fd4b9fc | 693 | } |
fd9a8d71 TM |
694 | spin_unlock(&inode->i_lock); |
695 | pnfs_free_lseg_list(&lseg_list); | |
b20135d0 TM |
696 | /* Free all lsegs that are attached to commit buckets */ |
697 | nfs_commit_inode(inode, 0); | |
fd9a8d71 TM |
698 | pnfs_put_layout_hdr(lo); |
699 | iput(inode); | |
700 | } | |
701 | return ret; | |
702 | } | |
703 | ||
704 | int | |
705 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
706 | struct nfs_fsid *fsid, | |
707 | bool is_recall) | |
708 | { | |
709 | struct nfs_server *server; | |
710 | LIST_HEAD(layout_list); | |
c47abcf8 | 711 | |
974cec8c | 712 | spin_lock(&clp->cl_lock); |
6382a441 | 713 | rcu_read_lock(); |
fd9a8d71 | 714 | restart: |
6382a441 | 715 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
716 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
717 | continue; | |
718 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
719 | server, | |
720 | &layout_list) != 0) | |
721 | goto restart; | |
6382a441 WAA |
722 | } |
723 | rcu_read_unlock(); | |
974cec8c AA |
724 | spin_unlock(&clp->cl_lock); |
725 | ||
fd9a8d71 TM |
726 | if (list_empty(&layout_list)) |
727 | return 0; | |
728 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
729 | } | |
730 | ||
731 | int | |
732 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
733 | bool is_recall) | |
734 | { | |
735 | struct nfs_server *server; | |
736 | LIST_HEAD(layout_list); | |
737 | ||
738 | spin_lock(&clp->cl_lock); | |
739 | rcu_read_lock(); | |
740 | restart: | |
741 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
742 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
743 | server, | |
744 | &layout_list) != 0) | |
745 | goto restart; | |
974cec8c | 746 | } |
fd9a8d71 TM |
747 | rcu_read_unlock(); |
748 | spin_unlock(&clp->cl_lock); | |
749 | ||
750 | if (list_empty(&layout_list)) | |
751 | return 0; | |
752 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
753 | } | |
754 | ||
755 | /* | |
756 | * Called by the state manger to remove all layouts established under an | |
757 | * expired lease. | |
758 | */ | |
759 | void | |
760 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
761 | { | |
762 | nfs4_deviceid_mark_client_invalid(clp); | |
763 | nfs4_deviceid_purge_client(clp); | |
764 | ||
765 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
766 | } |
767 | ||
fd6002e9 | 768 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
769 | void |
770 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
771 | bool update_barrier) | |
b1f69b75 | 772 | { |
ecebb80b TM |
773 | u32 oldseq, newseq, new_barrier = 0; |
774 | bool invalid = !pnfs_layout_is_valid(lo); | |
b1f69b75 | 775 | |
2d2f24ad TM |
776 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
777 | newseq = be32_to_cpu(new->seqid); | |
ecebb80b | 778 | if (invalid || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 779 | nfs4_stateid_copy(&lo->plh_stateid, new); |
ecebb80b TM |
780 | /* |
781 | * Because of wraparound, we want to keep the barrier | |
782 | * "close" to the current seqids. | |
783 | */ | |
784 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); | |
43f1b3da | 785 | } |
ecebb80b TM |
786 | if (update_barrier) |
787 | new_barrier = be32_to_cpu(new->seqid); | |
788 | else if (new_barrier == 0) | |
789 | return; | |
790 | if (invalid || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) | |
791 | lo->plh_barrier = new_barrier; | |
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 | ||
803 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
804 | static bool | |
e1c06f80 | 805 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo) |
19c54aba | 806 | { |
f7e8917a | 807 | return lo->plh_block_lgets || |
e1c06f80 | 808 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
cf7d63f1 FI |
809 | } |
810 | ||
b1f69b75 | 811 | /* |
183d9e7b JL |
812 | * Get layout from server. |
813 | * for now, assume that whole file layouts are requested. | |
814 | * arg->offset: 0 | |
815 | * arg->length: all ones | |
816 | */ | |
e5e94017 BH |
817 | static struct pnfs_layout_segment * |
818 | send_layoutget(struct pnfs_layout_hdr *lo, | |
819 | struct nfs_open_context *ctx, | |
183d9e7b | 820 | nfs4_stateid *stateid, |
e144e539 | 821 | const struct pnfs_layout_range *range, |
183d9e7b | 822 | long *timeout, 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; | |
2d89a1d3 | 827 | loff_t i_size; |
b1f69b75 AA |
828 | |
829 | dprintk("--> %s\n", __func__); | |
e5e94017 | 830 | |
4f2e9dce JL |
831 | /* |
832 | * Synchronously retrieve layout information from server and | |
833 | * store in lseg. If we race with a concurrent seqid morphing | |
834 | * op, then re-send the LAYOUTGET. | |
835 | */ | |
83026d80 JL |
836 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
837 | if (lgp == NULL) | |
838 | return ERR_PTR(-ENOMEM); | |
839 | ||
840 | i_size = i_size_read(ino); | |
841 | ||
842 | lgp->args.minlength = PAGE_SIZE; | |
843 | if (lgp->args.minlength > range->length) | |
844 | lgp->args.minlength = range->length; | |
845 | if (range->iomode == IOMODE_READ) { | |
846 | if (range->offset >= i_size) | |
847 | lgp->args.minlength = 0; | |
848 | else if (i_size - range->offset < lgp->args.minlength) | |
849 | lgp->args.minlength = i_size - range->offset; | |
d03ab29d | 850 | } |
83026d80 JL |
851 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
852 | pnfs_copy_range(&lgp->args.range, range); | |
853 | lgp->args.type = server->pnfs_curr_ld->id; | |
854 | lgp->args.inode = ino; | |
855 | lgp->args.ctx = get_nfs_open_context(ctx); | |
183d9e7b | 856 | nfs4_stateid_copy(&lgp->args.stateid, stateid); |
83026d80 JL |
857 | lgp->gfp_flags = gfp_flags; |
858 | lgp->cred = lo->plh_lc_cred; | |
35124a09 | 859 | |
183d9e7b | 860 | return nfs4_proc_layoutget(lgp, timeout, gfp_flags); |
974cec8c AA |
861 | } |
862 | ||
24956804 TM |
863 | static void pnfs_clear_layoutcommit(struct inode *inode, |
864 | struct list_head *head) | |
865 | { | |
866 | struct nfs_inode *nfsi = NFS_I(inode); | |
867 | struct pnfs_layout_segment *lseg, *tmp; | |
868 | ||
869 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
870 | return; | |
871 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
872 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
873 | continue; | |
874 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
875 | } | |
876 | } | |
877 | ||
d67ae825 TH |
878 | void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
879 | { | |
880 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
881 | smp_mb__after_atomic(); | |
882 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
7f27392c | 883 | rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); |
d67ae825 TH |
884 | } |
885 | ||
8e0acf90 TM |
886 | static void |
887 | pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo) | |
888 | { | |
889 | lo->plh_return_iomode = 0; | |
890 | lo->plh_return_seq = 0; | |
891 | clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); | |
892 | } | |
893 | ||
13c13a6a | 894 | static bool |
e5fd1904 TM |
895 | pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo, |
896 | nfs4_stateid *stateid, | |
897 | enum pnfs_iomode *iomode) | |
13c13a6a TM |
898 | { |
899 | if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
900 | return false; | |
13c13a6a | 901 | pnfs_get_layout_hdr(lo); |
e5fd1904 TM |
902 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) { |
903 | if (stateid != NULL) { | |
904 | nfs4_stateid_copy(stateid, &lo->plh_stateid); | |
905 | if (lo->plh_return_seq != 0) | |
906 | stateid->seqid = cpu_to_be32(lo->plh_return_seq); | |
907 | } | |
908 | if (iomode != NULL) | |
909 | *iomode = lo->plh_return_iomode; | |
910 | pnfs_clear_layoutreturn_info(lo); | |
911 | return true; | |
912 | } | |
913 | if (stateid != NULL) | |
914 | nfs4_stateid_copy(stateid, &lo->plh_stateid); | |
915 | if (iomode != NULL) | |
916 | *iomode = IOMODE_ANY; | |
13c13a6a TM |
917 | return true; |
918 | } | |
919 | ||
f40eb5d0 | 920 | static int |
ed429d6b | 921 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid, |
6c16605d | 922 | enum pnfs_iomode iomode, bool sync) |
f40eb5d0 PT |
923 | { |
924 | struct inode *ino = lo->plh_inode; | |
925 | struct nfs4_layoutreturn *lrp; | |
926 | int status = 0; | |
927 | ||
e4af440a | 928 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
929 | if (unlikely(lrp == NULL)) { |
930 | status = -ENOMEM; | |
931 | spin_lock(&ino->i_lock); | |
d67ae825 | 932 | pnfs_clear_layoutreturn_waitbit(lo); |
f40eb5d0 PT |
933 | spin_unlock(&ino->i_lock); |
934 | pnfs_put_layout_hdr(lo); | |
935 | goto out; | |
936 | } | |
937 | ||
ed429d6b | 938 | nfs4_stateid_copy(&lrp->args.stateid, stateid); |
f40eb5d0 PT |
939 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
940 | lrp->args.inode = ino; | |
15eb67c1 PT |
941 | lrp->args.range.iomode = iomode; |
942 | lrp->args.range.offset = 0; | |
943 | lrp->args.range.length = NFS4_MAX_UINT64; | |
f40eb5d0 PT |
944 | lrp->args.layout = lo; |
945 | lrp->clp = NFS_SERVER(ino)->nfs_client; | |
946 | lrp->cred = lo->plh_lc_cred; | |
947 | ||
6c16605d | 948 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
949 | out: |
950 | dprintk("<-- %s status: %d\n", __func__, status); | |
951 | return status; | |
952 | } | |
953 | ||
13c13a6a TM |
954 | /* Return true if layoutreturn is needed */ |
955 | static bool | |
956 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo) | |
957 | { | |
958 | struct pnfs_layout_segment *s; | |
959 | ||
2370abda | 960 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
961 | return false; |
962 | ||
963 | /* Defer layoutreturn until all lsegs are done */ | |
964 | list_for_each_entry(s, &lo->plh_segs, pls_list) { | |
965 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) | |
966 | return false; | |
967 | } | |
968 | ||
969 | return true; | |
970 | } | |
971 | ||
972 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo) | |
973 | { | |
974 | struct inode *inode= lo->plh_inode; | |
975 | ||
2370abda | 976 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
977 | return; |
978 | spin_lock(&inode->i_lock); | |
979 | if (pnfs_layout_need_return(lo)) { | |
980 | nfs4_stateid stateid; | |
981 | enum pnfs_iomode iomode; | |
982 | bool send; | |
983 | ||
e5fd1904 | 984 | send = pnfs_prepare_layoutreturn(lo, &stateid, &iomode); |
13c13a6a TM |
985 | spin_unlock(&inode->i_lock); |
986 | if (send) { | |
987 | /* Send an async layoutreturn so we dont deadlock */ | |
988 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
989 | } | |
990 | } else | |
991 | spin_unlock(&inode->i_lock); | |
992 | } | |
993 | ||
293b3b06 AA |
994 | /* |
995 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
996 | * when the layout segment list is empty. | |
997 | * | |
998 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
999 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
1000 | * deviceid is marked invalid. | |
1001 | */ | |
cbe82603 BH |
1002 | int |
1003 | _pnfs_return_layout(struct inode *ino) | |
1004 | { | |
1005 | struct pnfs_layout_hdr *lo = NULL; | |
1006 | struct nfs_inode *nfsi = NFS_I(ino); | |
1007 | LIST_HEAD(tmp_list); | |
cbe82603 | 1008 | nfs4_stateid stateid; |
293b3b06 | 1009 | int status = 0, empty; |
7f27392c | 1010 | bool send; |
cbe82603 | 1011 | |
366d5052 | 1012 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
1013 | |
1014 | spin_lock(&ino->i_lock); | |
1015 | lo = nfsi->layout; | |
e5929f3c | 1016 | if (!lo) { |
cbe82603 | 1017 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
1018 | dprintk("NFS: %s no layout to return\n", __func__); |
1019 | goto out; | |
cbe82603 | 1020 | } |
cbe82603 | 1021 | /* Reference matched in nfs4_layoutreturn_release */ |
70c3bd2b | 1022 | pnfs_get_layout_hdr(lo); |
293b3b06 | 1023 | empty = list_empty(&lo->plh_segs); |
24956804 | 1024 | pnfs_clear_layoutcommit(ino, &tmp_list); |
6d597e17 | 1025 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL, 0); |
c88953d8 CH |
1026 | |
1027 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
1028 | struct pnfs_layout_range range = { | |
1029 | .iomode = IOMODE_ANY, | |
1030 | .offset = 0, | |
1031 | .length = NFS4_MAX_UINT64, | |
1032 | }; | |
1033 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1034 | } | |
1035 | ||
293b3b06 AA |
1036 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
1037 | if (empty) { | |
1038 | spin_unlock(&ino->i_lock); | |
293b3b06 | 1039 | dprintk("NFS: %s no layout segments to return\n", __func__); |
7f27392c | 1040 | goto out_put_layout_hdr; |
293b3b06 | 1041 | } |
47abadef CH |
1042 | |
1043 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
e5fd1904 | 1044 | send = pnfs_prepare_layoutreturn(lo, &stateid, NULL); |
cbe82603 BH |
1045 | spin_unlock(&ino->i_lock); |
1046 | pnfs_free_lseg_list(&tmp_list); | |
7f27392c | 1047 | if (send) |
ed429d6b | 1048 | status = pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
7f27392c TM |
1049 | out_put_layout_hdr: |
1050 | pnfs_put_layout_hdr(lo); | |
cbe82603 BH |
1051 | out: |
1052 | dprintk("<-- %s status: %d\n", __func__, status); | |
1053 | return status; | |
1054 | } | |
0a57cdac | 1055 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 1056 | |
24028672 TM |
1057 | int |
1058 | pnfs_commit_and_return_layout(struct inode *inode) | |
1059 | { | |
1060 | struct pnfs_layout_hdr *lo; | |
1061 | int ret; | |
1062 | ||
1063 | spin_lock(&inode->i_lock); | |
1064 | lo = NFS_I(inode)->layout; | |
1065 | if (lo == NULL) { | |
1066 | spin_unlock(&inode->i_lock); | |
1067 | return 0; | |
1068 | } | |
1069 | pnfs_get_layout_hdr(lo); | |
1070 | /* Block new layoutgets and read/write to ds */ | |
1071 | lo->plh_block_lgets++; | |
1072 | spin_unlock(&inode->i_lock); | |
1073 | filemap_fdatawait(inode->i_mapping); | |
1074 | ret = pnfs_layoutcommit_inode(inode, true); | |
1075 | if (ret == 0) | |
1076 | ret = _pnfs_return_layout(inode); | |
1077 | spin_lock(&inode->i_lock); | |
1078 | lo->plh_block_lgets--; | |
1079 | spin_unlock(&inode->i_lock); | |
1080 | pnfs_put_layout_hdr(lo); | |
1081 | return ret; | |
1082 | } | |
1083 | ||
f7e8917a FI |
1084 | bool pnfs_roc(struct inode *ino) |
1085 | { | |
40dd4b7a TM |
1086 | struct nfs_inode *nfsi = NFS_I(ino); |
1087 | struct nfs_open_context *ctx; | |
1088 | struct nfs4_state *state; | |
f7e8917a FI |
1089 | struct pnfs_layout_hdr *lo; |
1090 | struct pnfs_layout_segment *lseg, *tmp; | |
193e3aa2 | 1091 | nfs4_stateid stateid; |
f7e8917a | 1092 | LIST_HEAD(tmp_list); |
e755d638 | 1093 | bool found = false, layoutreturn = false, roc = false; |
f7e8917a FI |
1094 | |
1095 | spin_lock(&ino->i_lock); | |
40dd4b7a | 1096 | lo = nfsi->layout; |
3976143b | 1097 | if (!lo || test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
40dd4b7a TM |
1098 | goto out_noroc; |
1099 | ||
e755d638 | 1100 | /* no roc if we hold a delegation */ |
40dd4b7a TM |
1101 | if (nfs4_check_delegation(ino, FMODE_READ)) |
1102 | goto out_noroc; | |
1103 | ||
1104 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1105 | state = ctx->state; | |
1106 | /* Don't return layout if there is open file state */ | |
1107 | if (state != NULL && state->state != 0) | |
1108 | goto out_noroc; | |
1109 | } | |
1110 | ||
e755d638 | 1111 | /* always send layoutreturn if being marked so */ |
e5fd1904 TM |
1112 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
1113 | layoutreturn = pnfs_prepare_layoutreturn(lo, | |
1114 | &stateid, NULL); | |
e755d638 | 1115 | |
f7e8917a | 1116 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
e755d638 PT |
1117 | /* If we are sending layoutreturn, invalidate all valid lsegs */ |
1118 | if (layoutreturn || test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
f7e8917a FI |
1119 | mark_lseg_invalid(lseg, &tmp_list); |
1120 | found = true; | |
1121 | } | |
500d701f | 1122 | /* ROC in two conditions: |
e755d638 PT |
1123 | * 1. there are ROC lsegs |
1124 | * 2. we don't send layoutreturn | |
e755d638 | 1125 | */ |
500d701f PT |
1126 | if (found && !layoutreturn) { |
1127 | /* lo ref dropped in pnfs_roc_release() */ | |
1128 | pnfs_get_layout_hdr(lo); | |
e755d638 | 1129 | roc = true; |
500d701f | 1130 | } |
f7e8917a | 1131 | |
40dd4b7a | 1132 | out_noroc: |
f7e8917a | 1133 | spin_unlock(&ino->i_lock); |
e755d638 PT |
1134 | pnfs_free_lseg_list(&tmp_list); |
1135 | pnfs_layoutcommit_inode(ino, true); | |
1136 | if (layoutreturn) | |
ed429d6b | 1137 | pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
e755d638 | 1138 | return roc; |
f7e8917a FI |
1139 | } |
1140 | ||
1141 | void pnfs_roc_release(struct inode *ino) | |
1142 | { | |
1143 | struct pnfs_layout_hdr *lo; | |
1144 | ||
1145 | spin_lock(&ino->i_lock); | |
1146 | lo = NFS_I(ino)->layout; | |
5c4a79fb | 1147 | pnfs_clear_layoutreturn_waitbit(lo); |
6622c3ea TM |
1148 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1149 | pnfs_detach_layout_hdr(lo); | |
1150 | spin_unlock(&ino->i_lock); | |
1151 | pnfs_free_layout_hdr(lo); | |
1152 | } else | |
1153 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1154 | } |
1155 | ||
1156 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1157 | { | |
1158 | struct pnfs_layout_hdr *lo; | |
1159 | ||
1160 | spin_lock(&ino->i_lock); | |
1161 | lo = NFS_I(ino)->layout; | |
0654cc72 | 1162 | pnfs_mark_layout_returned_if_empty(lo); |
0f35ad6f | 1163 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1164 | lo->plh_barrier = barrier; |
1165 | spin_unlock(&ino->i_lock); | |
6a463beb | 1166 | trace_nfs4_layoutreturn_on_close(ino, 0); |
f7e8917a FI |
1167 | } |
1168 | ||
4ff376fe | 1169 | void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier) |
f7e8917a FI |
1170 | { |
1171 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1172 | struct pnfs_layout_hdr *lo; |
7fdab069 | 1173 | u32 current_seqid; |
f7e8917a FI |
1174 | |
1175 | spin_lock(&ino->i_lock); | |
7fdab069 TM |
1176 | lo = nfsi->layout; |
1177 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1178 | |
7fdab069 TM |
1179 | /* Since close does not return a layout stateid for use as |
1180 | * a barrier, we choose the worst-case barrier. | |
1181 | */ | |
1182 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
f7e8917a | 1183 | spin_unlock(&ino->i_lock); |
f7e8917a FI |
1184 | } |
1185 | ||
500d701f PT |
1186 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
1187 | { | |
1188 | struct nfs_inode *nfsi = NFS_I(ino); | |
1189 | struct pnfs_layout_hdr *lo; | |
1190 | bool sleep = false; | |
1191 | ||
1192 | /* we might not have grabbed lo reference. so need to check under | |
1193 | * i_lock */ | |
1194 | spin_lock(&ino->i_lock); | |
1195 | lo = nfsi->layout; | |
1196 | if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
1197 | sleep = true; | |
1198 | spin_unlock(&ino->i_lock); | |
1199 | ||
1200 | if (sleep) | |
1201 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
1202 | ||
1203 | return sleep; | |
1204 | } | |
1205 | ||
b1f69b75 AA |
1206 | /* |
1207 | * Compare two layout segments for sorting into layout cache. | |
1208 | * We want to preferentially return RW over RO layouts, so ensure those | |
1209 | * are seen first. | |
1210 | */ | |
1211 | static s64 | |
7dc0ac70 | 1212 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1213 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1214 | { |
fb3296eb BH |
1215 | s64 d; |
1216 | ||
1217 | /* high offset > low offset */ | |
1218 | d = l1->offset - l2->offset; | |
1219 | if (d) | |
1220 | return d; | |
1221 | ||
1222 | /* short length > long length */ | |
1223 | d = l2->length - l1->length; | |
1224 | if (d) | |
1225 | return d; | |
1226 | ||
b1f69b75 | 1227 | /* read > read/write */ |
fb3296eb | 1228 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1229 | } |
1230 | ||
03772d2f TM |
1231 | static bool |
1232 | pnfs_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
1233 | const struct pnfs_layout_range *l2) | |
1234 | { | |
1235 | return pnfs_lseg_range_cmp(l1, l2) > 0; | |
1236 | } | |
1237 | ||
1238 | static bool | |
1239 | pnfs_lseg_no_merge(struct pnfs_layout_segment *lseg, | |
1240 | struct pnfs_layout_segment *old) | |
1241 | { | |
1242 | return false; | |
1243 | } | |
1244 | ||
1245 | void | |
1246 | pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1247 | struct pnfs_layout_segment *lseg, | |
1248 | bool (*is_after)(const struct pnfs_layout_range *, | |
1249 | const struct pnfs_layout_range *), | |
1250 | bool (*do_merge)(struct pnfs_layout_segment *, | |
1251 | struct pnfs_layout_segment *), | |
1252 | struct list_head *free_me) | |
974cec8c | 1253 | { |
03772d2f | 1254 | struct pnfs_layout_segment *lp, *tmp; |
b1f69b75 | 1255 | |
974cec8c AA |
1256 | dprintk("%s:Begin\n", __func__); |
1257 | ||
03772d2f TM |
1258 | list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) { |
1259 | if (test_bit(NFS_LSEG_VALID, &lp->pls_flags) == 0) | |
1260 | continue; | |
1261 | if (do_merge(lseg, lp)) { | |
1262 | mark_lseg_invalid(lp, free_me); | |
1263 | continue; | |
1264 | } | |
1265 | if (is_after(&lseg->pls_range, &lp->pls_range)) | |
b1f69b75 | 1266 | continue; |
566052c5 | 1267 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1268 | dprintk("%s: inserted lseg %p " |
1269 | "iomode %d offset %llu length %llu before " | |
1270 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1271 | __func__, lseg, lseg->pls_range.iomode, |
1272 | lseg->pls_range.offset, lseg->pls_range.length, | |
1273 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1274 | lp->pls_range.length); | |
fb3296eb | 1275 | goto out; |
974cec8c | 1276 | } |
fb3296eb BH |
1277 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1278 | dprintk("%s: inserted lseg %p " | |
1279 | "iomode %d offset %llu length %llu at tail\n", | |
1280 | __func__, lseg, lseg->pls_range.iomode, | |
1281 | lseg->pls_range.offset, lseg->pls_range.length); | |
1282 | out: | |
70c3bd2b | 1283 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1284 | |
1285 | dprintk("%s:Return\n", __func__); | |
e5e94017 | 1286 | } |
03772d2f TM |
1287 | EXPORT_SYMBOL_GPL(pnfs_generic_layout_insert_lseg); |
1288 | ||
1289 | static void | |
1290 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1291 | struct pnfs_layout_segment *lseg, | |
1292 | struct list_head *free_me) | |
1293 | { | |
1294 | struct inode *inode = lo->plh_inode; | |
1295 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
1296 | ||
1297 | if (ld->add_lseg != NULL) | |
1298 | ld->add_lseg(lo, lseg, free_me); | |
1299 | else | |
1300 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
1301 | pnfs_lseg_range_is_after, | |
1302 | pnfs_lseg_no_merge, | |
1303 | free_me); | |
1304 | } | |
e5e94017 BH |
1305 | |
1306 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1307 | alloc_init_layout_hdr(struct inode *ino, |
1308 | struct nfs_open_context *ctx, | |
1309 | gfp_t gfp_flags) | |
e5e94017 BH |
1310 | { |
1311 | struct pnfs_layout_hdr *lo; | |
1312 | ||
636fb9c8 | 1313 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1314 | if (!lo) |
1315 | return NULL; | |
cc6e5340 | 1316 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1317 | INIT_LIST_HEAD(&lo->plh_layouts); |
1318 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1319 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1320 | lo->plh_inode = ino; |
5cc2216d | 1321 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
67a3b721 | 1322 | lo->plh_flags |= 1 << NFS_LAYOUT_INVALID_STID; |
e5e94017 BH |
1323 | return lo; |
1324 | } | |
1325 | ||
1326 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1327 | pnfs_find_alloc_layout(struct inode *ino, |
1328 | struct nfs_open_context *ctx, | |
1329 | gfp_t gfp_flags) | |
e5241e43 TM |
1330 | __releases(&ino->i_lock) |
1331 | __acquires(&ino->i_lock) | |
e5e94017 BH |
1332 | { |
1333 | struct nfs_inode *nfsi = NFS_I(ino); | |
1334 | struct pnfs_layout_hdr *new = NULL; | |
1335 | ||
1336 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1337 | ||
251ec410 TM |
1338 | if (nfsi->layout != NULL) |
1339 | goto out_existing; | |
e5e94017 | 1340 | spin_unlock(&ino->i_lock); |
9fa40758 | 1341 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1342 | spin_lock(&ino->i_lock); |
1343 | ||
251ec410 | 1344 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1345 | nfsi->layout = new; |
251ec410 | 1346 | return new; |
7175fe90 YN |
1347 | } else if (new != NULL) |
1348 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1349 | out_existing: |
1350 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1351 | return nfsi->layout; |
1352 | } | |
1353 | ||
b1f69b75 AA |
1354 | /* |
1355 | * iomode matching rules: | |
c7d73af2 TH |
1356 | * iomode lseg strict match |
1357 | * iomode | |
1358 | * ----- ----- ------ ----- | |
1359 | * ANY READ N/A true | |
1360 | * ANY RW N/A true | |
1361 | * RW READ N/A false | |
1362 | * RW RW N/A true | |
1363 | * READ READ N/A true | |
1364 | * READ RW true false | |
1365 | * READ RW false true | |
b1f69b75 | 1366 | */ |
3cb2df17 | 1367 | static bool |
7dc0ac70 | 1368 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
c7d73af2 TH |
1369 | const struct pnfs_layout_range *range, |
1370 | bool strict_iomode) | |
b1f69b75 | 1371 | { |
fb3296eb BH |
1372 | struct pnfs_layout_range range1; |
1373 | ||
1374 | if ((range->iomode == IOMODE_RW && | |
1375 | ls_range->iomode != IOMODE_RW) || | |
c7d73af2 TH |
1376 | (range->iomode != ls_range->iomode && |
1377 | strict_iomode == true) || | |
7dc0ac70 | 1378 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1379 | return 0; |
1380 | ||
1381 | /* range1 covers only the first byte in the range */ | |
1382 | range1 = *range; | |
1383 | range1.length = 1; | |
7dc0ac70 | 1384 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1385 | } |
1386 | ||
1387 | /* | |
1388 | * lookup range in layout | |
1389 | */ | |
e5e94017 | 1390 | static struct pnfs_layout_segment * |
fb3296eb | 1391 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
c7d73af2 TH |
1392 | struct pnfs_layout_range *range, |
1393 | bool strict_iomode) | |
e5e94017 | 1394 | { |
b1f69b75 AA |
1395 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1396 | ||
1397 | dprintk("%s:Begin\n", __func__); | |
1398 | ||
b7edfaa1 | 1399 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1400 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1401 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
c7d73af2 TH |
1402 | pnfs_lseg_range_match(&lseg->pls_range, range, |
1403 | strict_iomode)) { | |
9369a431 | 1404 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1405 | break; |
1406 | } | |
b1f69b75 AA |
1407 | } |
1408 | ||
1409 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1410 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1411 | return ret; |
e5e94017 BH |
1412 | } |
1413 | ||
d23d61c8 AA |
1414 | /* |
1415 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1416 | * to the MDS or over pNFS | |
1417 | * | |
1418 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1419 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1420 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1421 | * WRITE request. | |
1422 | * | |
1423 | * A return of true means use MDS I/O. | |
1424 | * | |
1425 | * From rfc 5661: | |
1426 | * If a file's size is smaller than the file size threshold, data accesses | |
1427 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1428 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1429 | * server. If both file size and I/O size are provided, the client SHOULD | |
1430 | * reach or exceed both thresholds before sending its read or write | |
1431 | * requests to the data server. | |
1432 | */ | |
1433 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1434 | struct inode *ino, int iomode) | |
1435 | { | |
1436 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1437 | struct nfs_inode *nfsi = NFS_I(ino); | |
1438 | loff_t fsize = i_size_read(ino); | |
1439 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1440 | ||
1441 | if (t == NULL) | |
1442 | return ret; | |
1443 | ||
1444 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1445 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1446 | ||
1447 | switch (iomode) { | |
1448 | case IOMODE_READ: | |
1449 | if (t->bm & THRESHOLD_RD) { | |
1450 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1451 | size_set = true; | |
1452 | if (fsize < t->rd_sz) | |
1453 | size = true; | |
1454 | } | |
1455 | if (t->bm & THRESHOLD_RD_IO) { | |
1456 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1457 | nfsi->read_io); | |
1458 | io_set = true; | |
1459 | if (nfsi->read_io < t->rd_io_sz) | |
1460 | io = true; | |
1461 | } | |
1462 | break; | |
1463 | case IOMODE_RW: | |
1464 | if (t->bm & THRESHOLD_WR) { | |
1465 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1466 | size_set = true; | |
1467 | if (fsize < t->wr_sz) | |
1468 | size = true; | |
1469 | } | |
1470 | if (t->bm & THRESHOLD_WR_IO) { | |
1471 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1472 | nfsi->write_io); | |
1473 | io_set = true; | |
1474 | if (nfsi->write_io < t->wr_io_sz) | |
1475 | io = true; | |
1476 | } | |
1477 | break; | |
1478 | } | |
1479 | if (size_set && io_set) { | |
1480 | if (size && io) | |
1481 | ret = true; | |
1482 | } else if (size || io) | |
1483 | ret = true; | |
1484 | ||
1485 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1486 | return ret; | |
1487 | } | |
1488 | ||
aa8a45ee PT |
1489 | static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) |
1490 | { | |
1491 | /* | |
1492 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1493 | * reference | |
1494 | */ | |
1495 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
1496 | return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
2e5b29f0 | 1497 | nfs_wait_bit_killable, |
aa8a45ee PT |
1498 | TASK_UNINTERRUPTIBLE); |
1499 | } | |
1500 | ||
d67ae825 TH |
1501 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1502 | { | |
1503 | unsigned long *bitlock = &lo->plh_flags; | |
1504 | ||
1505 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1506 | smp_mb__after_atomic(); | |
1507 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1508 | } | |
1509 | ||
e5e94017 BH |
1510 | /* |
1511 | * Layout segment is retreived from the server if not cached. | |
1512 | * The appropriate layout segment is referenced and returned to the caller. | |
1513 | */ | |
7c24d948 | 1514 | struct pnfs_layout_segment * |
e5e94017 BH |
1515 | pnfs_update_layout(struct inode *ino, |
1516 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1517 | loff_t pos, |
1518 | u64 count, | |
a75b9df9 | 1519 | enum pnfs_iomode iomode, |
c7d73af2 | 1520 | bool strict_iomode, |
a75b9df9 | 1521 | gfp_t gfp_flags) |
e5e94017 | 1522 | { |
fb3296eb BH |
1523 | struct pnfs_layout_range arg = { |
1524 | .iomode = iomode, | |
1525 | .offset = pos, | |
1526 | .length = count, | |
1527 | }; | |
183d9e7b | 1528 | unsigned pg_offset, seq; |
6382a441 WAA |
1529 | struct nfs_server *server = NFS_SERVER(ino); |
1530 | struct nfs_client *clp = server->nfs_client; | |
183d9e7b | 1531 | struct pnfs_layout_hdr *lo = NULL; |
e5e94017 | 1532 | struct pnfs_layout_segment *lseg = NULL; |
183d9e7b JL |
1533 | nfs4_stateid stateid; |
1534 | long timeout = 0; | |
1535 | unsigned long giveup = jiffies + rpc_get_timeout(server->client); | |
30005121 | 1536 | bool first; |
e5e94017 | 1537 | |
9a4bf31d | 1538 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) { |
183d9e7b | 1539 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1540 | PNFS_UPDATE_LAYOUT_NO_PNFS); |
f86bbcf8 | 1541 | goto out; |
9a4bf31d | 1542 | } |
d23d61c8 | 1543 | |
9a4bf31d | 1544 | if (iomode == IOMODE_READ && i_size_read(ino) == 0) { |
183d9e7b | 1545 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1546 | PNFS_UPDATE_LAYOUT_RD_ZEROLEN); |
4ae93560 | 1547 | goto out; |
9a4bf31d | 1548 | } |
4ae93560 | 1549 | |
9a4bf31d | 1550 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { |
183d9e7b | 1551 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1552 | PNFS_UPDATE_LAYOUT_MDSTHRESH); |
f86bbcf8 | 1553 | goto out; |
9a4bf31d | 1554 | } |
d23d61c8 | 1555 | |
9bf87482 PT |
1556 | lookup_again: |
1557 | first = false; | |
e5e94017 | 1558 | spin_lock(&ino->i_lock); |
9fa40758 | 1559 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1560 | if (lo == NULL) { |
1561 | spin_unlock(&ino->i_lock); | |
183d9e7b | 1562 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1563 | PNFS_UPDATE_LAYOUT_NOMEM); |
830ffb56 TM |
1564 | goto out; |
1565 | } | |
e5e94017 | 1566 | |
43f1b3da | 1567 | /* Do we even need to bother with this? */ |
a59c30ac | 1568 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
183d9e7b | 1569 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1570 | PNFS_UPDATE_LAYOUT_BULK_RECALL); |
43f1b3da | 1571 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1572 | goto out_unlock; |
1573 | } | |
1574 | ||
1575 | /* if LAYOUTGET already failed once we don't try again */ | |
2e5b29f0 | 1576 | if (pnfs_layout_io_test_failed(lo, iomode)) { |
183d9e7b | 1577 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1578 | PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); |
e5e94017 | 1579 | goto out_unlock; |
9a4bf31d | 1580 | } |
e5e94017 | 1581 | |
c7d73af2 | 1582 | lseg = pnfs_find_lseg(lo, &arg, strict_iomode); |
183d9e7b JL |
1583 | if (lseg) { |
1584 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
1585 | PNFS_UPDATE_LAYOUT_FOUND_CACHED); | |
1586 | goto out_unlock; | |
1587 | } | |
1588 | ||
1589 | if (!nfs4_valid_open_stateid(ctx->state)) { | |
1590 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
1591 | PNFS_UPDATE_LAYOUT_INVALID_OPEN); | |
1592 | goto out_unlock; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * Choose a stateid for the LAYOUTGET. If we don't have a layout | |
1597 | * stateid, or it has been invalidated, then we must use the open | |
1598 | * stateid. | |
1599 | */ | |
67a3b721 | 1600 | if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { |
183d9e7b JL |
1601 | |
1602 | /* | |
1603 | * The first layoutget for the file. Need to serialize per | |
9bf87482 PT |
1604 | * RFC 5661 Errata 3208. |
1605 | */ | |
1606 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1607 | &lo->plh_flags)) { | |
1608 | spin_unlock(&ino->i_lock); | |
1609 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1610 | TASK_UNINTERRUPTIBLE); | |
1611 | pnfs_put_layout_hdr(lo); | |
183d9e7b | 1612 | dprintk("%s retrying\n", __func__); |
9bf87482 PT |
1613 | goto lookup_again; |
1614 | } | |
183d9e7b JL |
1615 | |
1616 | first = true; | |
1617 | do { | |
1618 | seq = read_seqbegin(&ctx->state->seqlock); | |
1619 | nfs4_stateid_copy(&stateid, &ctx->state->stateid); | |
1620 | } while (read_seqretry(&ctx->state->seqlock, seq)); | |
9bf87482 | 1621 | } else { |
183d9e7b | 1622 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
9bf87482 | 1623 | } |
568e8c49 | 1624 | |
aa8a45ee PT |
1625 | /* |
1626 | * Because we free lsegs before sending LAYOUTRETURN, we need to wait | |
1627 | * for LAYOUTRETURN even if first is true. | |
1628 | */ | |
8f70f53a | 1629 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
aa8a45ee PT |
1630 | spin_unlock(&ino->i_lock); |
1631 | dprintk("%s wait for layoutreturn\n", __func__); | |
1632 | if (pnfs_prepare_to_retry_layoutget(lo)) { | |
d67ae825 TH |
1633 | if (first) |
1634 | pnfs_clear_first_layoutget(lo); | |
aa8a45ee PT |
1635 | pnfs_put_layout_hdr(lo); |
1636 | dprintk("%s retrying\n", __func__); | |
183d9e7b JL |
1637 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
1638 | lseg, PNFS_UPDATE_LAYOUT_RETRY); | |
aa8a45ee PT |
1639 | goto lookup_again; |
1640 | } | |
183d9e7b | 1641 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1642 | PNFS_UPDATE_LAYOUT_RETURN); |
aa8a45ee PT |
1643 | goto out_put_layout_hdr; |
1644 | } | |
1645 | ||
9a4bf31d | 1646 | if (pnfs_layoutgets_blocked(lo)) { |
183d9e7b | 1647 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1648 | PNFS_UPDATE_LAYOUT_BLOCKED); |
cf7d63f1 | 1649 | goto out_unlock; |
9a4bf31d | 1650 | } |
cf7d63f1 | 1651 | atomic_inc(&lo->plh_outstanding); |
f49f9baa | 1652 | spin_unlock(&ino->i_lock); |
30005121 | 1653 | |
abb9a007 | 1654 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1655 | /* The lo must be on the clp list if there is any |
1656 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1657 | */ | |
1658 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1659 | if (list_empty(&lo->plh_layouts)) |
1660 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1661 | spin_unlock(&clp->cl_lock); |
1662 | } | |
e5e94017 | 1663 | |
09cbfeaf | 1664 | pg_offset = arg.offset & ~PAGE_MASK; |
707ed5fd BH |
1665 | if (pg_offset) { |
1666 | arg.offset -= pg_offset; | |
1667 | arg.length += pg_offset; | |
1668 | } | |
7c24d948 | 1669 | if (arg.length != NFS4_MAX_UINT64) |
09cbfeaf | 1670 | arg.length = PAGE_ALIGN(arg.length); |
707ed5fd | 1671 | |
183d9e7b JL |
1672 | lseg = send_layoutget(lo, ctx, &stateid, &arg, &timeout, gfp_flags); |
1673 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
1674 | PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); | |
83026d80 | 1675 | if (IS_ERR(lseg)) { |
183d9e7b JL |
1676 | switch(PTR_ERR(lseg)) { |
1677 | case -ERECALLCONFLICT: | |
1678 | if (time_after(jiffies, giveup)) | |
1679 | lseg = NULL; | |
1680 | /* Fallthrough */ | |
1681 | case -EAGAIN: | |
1682 | pnfs_put_layout_hdr(lo); | |
83026d80 JL |
1683 | if (first) |
1684 | pnfs_clear_first_layoutget(lo); | |
183d9e7b JL |
1685 | if (lseg) { |
1686 | trace_pnfs_update_layout(ino, pos, count, | |
1687 | iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY); | |
1688 | goto lookup_again; | |
1689 | } | |
1690 | /* Fallthrough */ | |
1691 | default: | |
1692 | if (!nfs_error_is_fatal(PTR_ERR(lseg))) { | |
1693 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
1694 | lseg = NULL; | |
1695 | } | |
83026d80 JL |
1696 | } |
1697 | } else { | |
1698 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
1699 | } | |
1700 | ||
cf7d63f1 | 1701 | atomic_dec(&lo->plh_outstanding); |
830ffb56 | 1702 | out_put_layout_hdr: |
d67ae825 TH |
1703 | if (first) |
1704 | pnfs_clear_first_layoutget(lo); | |
70c3bd2b | 1705 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1706 | out: |
f86bbcf8 TM |
1707 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1708 | "(%s, offset: %llu, length: %llu)\n", | |
1709 | __func__, ino->i_sb->s_id, | |
1710 | (unsigned long long)NFS_FILEID(ino), | |
d600ad1f | 1711 | IS_ERR_OR_NULL(lseg) ? "not found" : "found", |
f86bbcf8 TM |
1712 | iomode==IOMODE_RW ? "read/write" : "read-only", |
1713 | (unsigned long long)pos, | |
1714 | (unsigned long long)count); | |
e5e94017 BH |
1715 | return lseg; |
1716 | out_unlock: | |
1717 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1718 | goto out_put_layout_hdr; |
e5e94017 | 1719 | } |
7c24d948 | 1720 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1721 | |
540d9864 TM |
1722 | static bool |
1723 | pnfs_sanity_check_layout_range(struct pnfs_layout_range *range) | |
1724 | { | |
1725 | switch (range->iomode) { | |
1726 | case IOMODE_READ: | |
1727 | case IOMODE_RW: | |
1728 | break; | |
1729 | default: | |
1730 | return false; | |
1731 | } | |
1732 | if (range->offset == NFS4_MAX_UINT64) | |
1733 | return false; | |
1734 | if (range->length == 0) | |
1735 | return false; | |
1736 | if (range->length != NFS4_MAX_UINT64 && | |
1737 | range->length > NFS4_MAX_UINT64 - range->offset) | |
1738 | return false; | |
1739 | return true; | |
1740 | } | |
1741 | ||
a0b0a6e3 | 1742 | struct pnfs_layout_segment * |
b1f69b75 AA |
1743 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1744 | { | |
1745 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1746 | struct nfs4_layoutget_res *res = &lgp->res; | |
1747 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1748 | struct inode *ino = lo->plh_inode; |
78096cca | 1749 | LIST_HEAD(free_me); |
540d9864 TM |
1750 | |
1751 | if (!pnfs_sanity_check_layout_range(&res->range)) | |
1b3c6d07 | 1752 | return ERR_PTR(-EINVAL); |
b1f69b75 AA |
1753 | |
1754 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1755 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
1b3c6d07 | 1756 | if (IS_ERR_OR_NULL(lseg)) { |
b1f69b75 | 1757 | if (!lseg) |
1b3c6d07 JL |
1758 | lseg = ERR_PTR(-ENOMEM); |
1759 | ||
1760 | dprintk("%s: Could not allocate layout: error %ld\n", | |
1761 | __func__, PTR_ERR(lseg)); | |
1762 | return lseg; | |
b1f69b75 AA |
1763 | } |
1764 | ||
1013df61 CH |
1765 | init_lseg(lo, lseg); |
1766 | lseg->pls_range = res->range; | |
66755283 | 1767 | lseg->pls_seq = be32_to_cpu(res->stateid.seqid); |
1013df61 | 1768 | |
b1f69b75 | 1769 | spin_lock(&ino->i_lock); |
e1c06f80 | 1770 | if (pnfs_layoutgets_blocked(lo)) { |
43f1b3da | 1771 | dprintk("%s forget reply due to state\n", __func__); |
1b3c6d07 | 1772 | goto out_forget; |
43f1b3da | 1773 | } |
038d6493 | 1774 | |
362f7474 CH |
1775 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1776 | /* existing state ID, make sure the sequence number matches. */ | |
1777 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1778 | dprintk("%s forget reply due to sequence\n", __func__); | |
1b3c6d07 | 1779 | goto out_forget; |
362f7474 CH |
1780 | } |
1781 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1782 | } else { | |
1783 | /* | |
1784 | * We got an entirely new state ID. Mark all segments for the | |
1785 | * inode invalid, and don't bother validating the stateid | |
1786 | * sequence number. | |
1787 | */ | |
6d597e17 | 1788 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL, 0); |
362f7474 CH |
1789 | |
1790 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1791 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1792 | } | |
038d6493 | 1793 | |
9369a431 | 1794 | pnfs_get_lseg(lseg); |
03772d2f | 1795 | pnfs_layout_insert_lseg(lo, lseg, &free_me); |
8e0acf90 TM |
1796 | if (!pnfs_layout_is_valid(lo)) { |
1797 | pnfs_clear_layoutreturn_info(lo); | |
1798 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
1799 | } | |
1800 | ||
b1f69b75 | 1801 | |
3976143b | 1802 | if (res->return_on_close) |
f7e8917a | 1803 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
f7e8917a | 1804 | |
b1f69b75 | 1805 | spin_unlock(&ino->i_lock); |
78096cca | 1806 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1807 | return lseg; |
43f1b3da | 1808 | |
1b3c6d07 | 1809 | out_forget: |
43f1b3da FI |
1810 | spin_unlock(&ino->i_lock); |
1811 | lseg->pls_layout = lo; | |
1812 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1b3c6d07 | 1813 | return ERR_PTR(-EAGAIN); |
b1f69b75 AA |
1814 | } |
1815 | ||
016256df | 1816 | static void |
3982a6a2 JL |
1817 | pnfs_set_plh_return_info(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode, |
1818 | u32 seq) | |
5c97f5de | 1819 | { |
2d6cf5ab | 1820 | if (lo->plh_return_iomode != 0 && lo->plh_return_iomode != iomode) |
5c97f5de TM |
1821 | iomode = IOMODE_ANY; |
1822 | lo->plh_return_iomode = iomode; | |
e0fa0d01 | 1823 | set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); |
2d6cf5ab TM |
1824 | if (seq != 0) { |
1825 | WARN_ON_ONCE(lo->plh_return_seq != 0 && lo->plh_return_seq != seq); | |
3982a6a2 | 1826 | lo->plh_return_seq = seq; |
2d6cf5ab | 1827 | } |
5c97f5de TM |
1828 | } |
1829 | ||
2f215968 TM |
1830 | /** |
1831 | * pnfs_mark_matching_lsegs_return - Free or return matching layout segments | |
1832 | * @lo: pointer to layout header | |
1833 | * @tmp_list: list header to be used with pnfs_free_lseg_list() | |
1834 | * @return_range: describe layout segment ranges to be returned | |
1835 | * | |
1836 | * This function is mainly intended for use by layoutrecall. It attempts | |
1837 | * to free the layout segment immediately, or else to mark it for return | |
1838 | * as soon as its reference count drops to zero. | |
1839 | */ | |
10335556 | 1840 | int |
016256df PT |
1841 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
1842 | struct list_head *tmp_list, | |
6d597e17 JL |
1843 | const struct pnfs_layout_range *return_range, |
1844 | u32 seq) | |
016256df PT |
1845 | { |
1846 | struct pnfs_layout_segment *lseg, *next; | |
10335556 | 1847 | int remaining = 0; |
016256df PT |
1848 | |
1849 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
1850 | ||
1851 | if (list_empty(&lo->plh_segs)) | |
10335556 | 1852 | return 0; |
016256df | 1853 | |
fc7ff367 | 1854 | assert_spin_locked(&lo->plh_inode->i_lock); |
016256df PT |
1855 | |
1856 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
e036f464 | 1857 | if (pnfs_match_lseg_recall(lseg, return_range, seq)) { |
016256df PT |
1858 | dprintk("%s: marking lseg %p iomode %d " |
1859 | "offset %llu length %llu\n", __func__, | |
1860 | lseg, lseg->pls_range.iomode, | |
1861 | lseg->pls_range.offset, | |
1862 | lseg->pls_range.length); | |
2f215968 TM |
1863 | if (mark_lseg_invalid(lseg, tmp_list)) |
1864 | continue; | |
1865 | remaining++; | |
016256df | 1866 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); |
016256df | 1867 | } |
6d597e17 JL |
1868 | |
1869 | if (remaining) | |
1870 | pnfs_set_plh_return_info(lo, return_range->iomode, seq); | |
1871 | ||
10335556 | 1872 | return remaining; |
016256df PT |
1873 | } |
1874 | ||
1875 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
1876 | struct pnfs_layout_segment *lseg) | |
1877 | { | |
1878 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
016256df PT |
1879 | struct pnfs_layout_range range = { |
1880 | .iomode = lseg->pls_range.iomode, | |
1881 | .offset = 0, | |
1882 | .length = NFS4_MAX_UINT64, | |
1883 | }; | |
1884 | LIST_HEAD(free_me); | |
10335556 | 1885 | bool return_now = false; |
016256df PT |
1886 | |
1887 | spin_lock(&inode->i_lock); | |
2d6cf5ab | 1888 | pnfs_set_plh_return_info(lo, range.iomode, 0); |
016256df PT |
1889 | /* |
1890 | * mark all matching lsegs so that we are sure to have no live | |
1891 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
1892 | * for how it works. | |
1893 | */ | |
2d6cf5ab | 1894 | if (!pnfs_mark_matching_lsegs_return(lo, &free_me, &range, 0)) { |
10335556 | 1895 | nfs4_stateid stateid; |
e5fd1904 | 1896 | enum pnfs_iomode iomode; |
10335556 | 1897 | |
e5fd1904 | 1898 | return_now = pnfs_prepare_layoutreturn(lo, &stateid, &iomode); |
10335556 TM |
1899 | spin_unlock(&inode->i_lock); |
1900 | if (return_now) | |
1901 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
1902 | } else { | |
1903 | spin_unlock(&inode->i_lock); | |
1904 | nfs_commit_inode(inode, 0); | |
1905 | } | |
016256df PT |
1906 | pnfs_free_lseg_list(&free_me); |
1907 | } | |
1908 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
1909 | ||
d8007d4d TM |
1910 | void |
1911 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1912 | { | |
1fd937bd PT |
1913 | u64 rd_size = req->wb_bytes; |
1914 | ||
cb5d04bc PT |
1915 | if (pgio->pg_lseg == NULL) { |
1916 | if (pgio->pg_dreq == NULL) | |
1917 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1918 | else | |
1919 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1920 | ||
1921 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1922 | req->wb_context, | |
1923 | req_offset(req), | |
1924 | rd_size, | |
1925 | IOMODE_READ, | |
c7d73af2 | 1926 | false, |
cb5d04bc | 1927 | GFP_KERNEL); |
d600ad1f PT |
1928 | if (IS_ERR(pgio->pg_lseg)) { |
1929 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1930 | pgio->pg_lseg = NULL; | |
1931 | return; | |
1932 | } | |
cb5d04bc | 1933 | } |
e885de1a TM |
1934 | /* If no lseg, fall back to read through mds */ |
1935 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1936 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1937 | |
d8007d4d TM |
1938 | } |
1939 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1940 | ||
1941 | void | |
6296556f PT |
1942 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1943 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1944 | { |
d600ad1f | 1945 | if (pgio->pg_lseg == NULL) { |
cb5d04bc PT |
1946 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1947 | req->wb_context, | |
1948 | req_offset(req), | |
1949 | wb_size, | |
1950 | IOMODE_RW, | |
c7d73af2 | 1951 | false, |
cb5d04bc | 1952 | GFP_NOFS); |
d600ad1f PT |
1953 | if (IS_ERR(pgio->pg_lseg)) { |
1954 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1955 | pgio->pg_lseg = NULL; | |
1956 | return; | |
1957 | } | |
1958 | } | |
e885de1a TM |
1959 | /* If no lseg, fall back to write through mds */ |
1960 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1961 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1962 | } |
1963 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1964 | ||
180bb5ec WAA |
1965 | void |
1966 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
1967 | { | |
1968 | if (desc->pg_lseg) { | |
1969 | pnfs_put_lseg(desc->pg_lseg); | |
1970 | desc->pg_lseg = NULL; | |
1971 | } | |
1972 | } | |
1973 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
1974 | ||
b4fdac1a WAA |
1975 | /* |
1976 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1977 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1978 | */ | |
1979 | size_t | |
a7d42ddb WAA |
1980 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
1981 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 1982 | { |
0f9c429e | 1983 | unsigned int size; |
c5e20cb7 | 1984 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1985 | |
1986 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1987 | if (!size) |
1988 | return 0; | |
94ad1c80 | 1989 | |
19982ba8 | 1990 | /* |
c5e20cb7 WAA |
1991 | * 'size' contains the number of bytes left in the current page (up |
1992 | * to the original size asked for in @req->wb_bytes). | |
1993 | * | |
1994 | * Calculate how many bytes are left in the layout segment | |
1995 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1996 | * |
1997 | * Please also note that 'end_offset' is actually the offset of the | |
1998 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1999 | * | |
2000 | */ | |
19b54848 | 2001 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
2002 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
2003 | pgio->pg_lseg->pls_range.length); | |
2004 | req_start = req_offset(req); | |
7c13789e | 2005 | WARN_ON_ONCE(req_start >= seg_end); |
c5e20cb7 | 2006 | /* start of request is past the last byte of this segment */ |
7c13789e WAA |
2007 | if (req_start >= seg_end) { |
2008 | /* reference the new lseg */ | |
2009 | if (pgio->pg_ops->pg_cleanup) | |
2010 | pgio->pg_ops->pg_cleanup(pgio); | |
2011 | if (pgio->pg_ops->pg_init) | |
2012 | pgio->pg_ops->pg_init(pgio, req); | |
19b54848 | 2013 | return 0; |
7c13789e | 2014 | } |
c5e20cb7 WAA |
2015 | |
2016 | /* adjust 'size' iff there are fewer bytes left in the | |
2017 | * segment than what nfs_generic_pg_test returned */ | |
2018 | seg_left = seg_end - req_start; | |
2019 | if (seg_left < size) | |
2020 | size = (unsigned int)seg_left; | |
19b54848 | 2021 | } |
0f9c429e | 2022 | |
19b54848 | 2023 | return size; |
94ad1c80 | 2024 | } |
89a58e32 | 2025 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 2026 | |
53113ad3 | 2027 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
2028 | { |
2029 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
2030 | |
2031 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
2032 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
2033 | hdr->completion_ops); | |
c7070113 | 2034 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 2035 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 2036 | } |
e7dd79af | 2037 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 2038 | |
d45f60c6 | 2039 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2040 | { |
cd841605 FI |
2041 | |
2042 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
2043 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2044 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2045 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2046 | } |
6c75dc0d | 2047 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2048 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
2049 | } |
2050 | ||
d20581aa BH |
2051 | /* |
2052 | * Called by non rpc-based layout drivers | |
2053 | */ | |
d45f60c6 | 2054 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 2055 | { |
f8417b48 | 2056 | if (likely(!hdr->pnfs_error)) { |
67af7611 TM |
2057 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
2058 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 2059 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
2060 | } |
2061 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); | |
2062 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2063 | pnfs_ld_handle_write_error(hdr); |
2064 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 2065 | } |
d20581aa | 2066 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 2067 | |
dce81290 TM |
2068 | static void |
2069 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2070 | struct nfs_pgio_header *hdr) |
dce81290 | 2071 | { |
48d635f1 | 2072 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2073 | |
6c75dc0d | 2074 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2075 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 2076 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 2077 | mirror->pg_recoalesce = 1; |
6c75dc0d | 2078 | } |
d45f60c6 | 2079 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2080 | hdr->release(hdr); |
dce81290 TM |
2081 | } |
2082 | ||
2083 | static enum pnfs_try_status | |
d45f60c6 | 2084 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
2085 | const struct rpc_call_ops *call_ops, |
2086 | struct pnfs_layout_segment *lseg, | |
2087 | int how) | |
0382b744 | 2088 | { |
cd841605 | 2089 | struct inode *inode = hdr->inode; |
0382b744 AA |
2090 | enum pnfs_try_status trypnfs; |
2091 | struct nfs_server *nfss = NFS_SERVER(inode); | |
2092 | ||
cd841605 | 2093 | hdr->mds_ops = call_ops; |
0382b744 AA |
2094 | |
2095 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
2096 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
2097 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 2098 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 2099 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
2100 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2101 | return trypnfs; | |
2102 | } | |
2103 | ||
dce81290 | 2104 | static void |
7f714720 WAA |
2105 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
2106 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 2107 | { |
dce81290 TM |
2108 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2109 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2110 | enum pnfs_try_status trypnfs; |
dce81290 | 2111 | |
d45f60c6 | 2112 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 2113 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 2114 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
2115 | } |
2116 | ||
6c75dc0d FI |
2117 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
2118 | { | |
9369a431 | 2119 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2120 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
2121 | } |
2122 | ||
dce81290 TM |
2123 | int |
2124 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
2125 | { | |
6c75dc0d | 2126 | struct nfs_pgio_header *hdr; |
dce81290 TM |
2127 | int ret; |
2128 | ||
1e7f3a48 WAA |
2129 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2130 | if (!hdr) { | |
2bff2288 PT |
2131 | desc->pg_error = -ENOMEM; |
2132 | return desc->pg_error; | |
dce81290 | 2133 | } |
6c75dc0d | 2134 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 2135 | |
9369a431 | 2136 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2137 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2138 | if (!ret) |
7f714720 | 2139 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 2140 | |
6c75dc0d | 2141 | return ret; |
dce81290 TM |
2142 | } |
2143 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
2144 | ||
53113ad3 | 2145 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
2146 | { |
2147 | struct nfs_pageio_descriptor pgio; | |
2148 | ||
1acbbb4e | 2149 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
2150 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
2151 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 2152 | } |
e7dd79af | 2153 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 2154 | |
d45f60c6 | 2155 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2156 | { |
cd841605 FI |
2157 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
2158 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2159 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2160 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2161 | } |
4db6e0b7 | 2162 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2163 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
2164 | } |
2165 | ||
d20581aa BH |
2166 | /* |
2167 | * Called by non rpc-based layout drivers | |
2168 | */ | |
d45f60c6 | 2169 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 2170 | { |
cd841605 | 2171 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
2172 | __nfs4_read_done_cb(hdr); |
2173 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
f8417b48 KM |
2174 | } |
2175 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); | |
2176 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2177 | pnfs_ld_handle_read_error(hdr); |
2178 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
2179 | } |
2180 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
2181 | ||
493292dd TM |
2182 | static void |
2183 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2184 | struct nfs_pgio_header *hdr) |
493292dd | 2185 | { |
48d635f1 | 2186 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2187 | |
4db6e0b7 | 2188 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2189 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 2190 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 2191 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 2192 | } |
d45f60c6 | 2193 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2194 | hdr->release(hdr); |
493292dd TM |
2195 | } |
2196 | ||
64419a9b AA |
2197 | /* |
2198 | * Call the appropriate parallel I/O subsystem read function. | |
2199 | */ | |
493292dd | 2200 | static enum pnfs_try_status |
d45f60c6 | 2201 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2202 | const struct rpc_call_ops *call_ops, |
2203 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2204 | { |
cd841605 | 2205 | struct inode *inode = hdr->inode; |
64419a9b AA |
2206 | struct nfs_server *nfss = NFS_SERVER(inode); |
2207 | enum pnfs_try_status trypnfs; | |
2208 | ||
cd841605 | 2209 | hdr->mds_ops = call_ops; |
64419a9b AA |
2210 | |
2211 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2212 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2213 | |
d45f60c6 | 2214 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2215 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2216 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2217 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2218 | return trypnfs; | |
2219 | } | |
863a3c6c | 2220 | |
ceb11e13 | 2221 | /* Resend all requests through pnfs. */ |
1b1bc66b | 2222 | void pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) |
ceb11e13 PT |
2223 | { |
2224 | struct nfs_pageio_descriptor pgio; | |
2225 | ||
1b1bc66b WAA |
2226 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
2227 | nfs_pageio_init_read(&pgio, hdr->inode, false, | |
2228 | hdr->completion_ops); | |
2229 | hdr->task.tk_status = nfs_pageio_resend(&pgio, hdr); | |
2230 | } | |
ceb11e13 PT |
2231 | } |
2232 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2233 | ||
493292dd | 2234 | static void |
7f714720 | 2235 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2236 | { |
493292dd TM |
2237 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2238 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2239 | enum pnfs_try_status trypnfs; |
493292dd | 2240 | |
d45f60c6 | 2241 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 | 2242 | if (trypnfs == PNFS_TRY_AGAIN) |
1b1bc66b WAA |
2243 | pnfs_read_resend_pnfs(hdr); |
2244 | if (trypnfs == PNFS_NOT_ATTEMPTED || hdr->task.tk_status) | |
d45f60c6 | 2245 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
2246 | } |
2247 | ||
4db6e0b7 FI |
2248 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
2249 | { | |
9369a431 | 2250 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2251 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
2252 | } |
2253 | ||
493292dd TM |
2254 | int |
2255 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
2256 | { | |
4db6e0b7 | 2257 | struct nfs_pgio_header *hdr; |
493292dd TM |
2258 | int ret; |
2259 | ||
1e7f3a48 WAA |
2260 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2261 | if (!hdr) { | |
2bff2288 PT |
2262 | desc->pg_error = -ENOMEM; |
2263 | return desc->pg_error; | |
493292dd | 2264 | } |
4db6e0b7 | 2265 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 2266 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2267 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2268 | if (!ret) |
7f714720 | 2269 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 2270 | return ret; |
493292dd TM |
2271 | } |
2272 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
2273 | ||
71244d9b TM |
2274 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
2275 | { | |
2276 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
2277 | ||
2278 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 2279 | smp_mb__after_atomic(); |
71244d9b TM |
2280 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
2281 | } | |
2282 | ||
863a3c6c | 2283 | /* |
a9bae566 | 2284 | * There can be multiple RW segments. |
863a3c6c | 2285 | */ |
a9bae566 | 2286 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 2287 | { |
a9bae566 | 2288 | struct pnfs_layout_segment *lseg; |
863a3c6c | 2289 | |
a9bae566 PT |
2290 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
2291 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 2292 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
2293 | list_add(&lseg->pls_lc_list, listp); |
2294 | } | |
863a3c6c AA |
2295 | } |
2296 | ||
a073dbff TM |
2297 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
2298 | { | |
2299 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
2300 | |
2301 | /* Matched by references in pnfs_set_layoutcommit */ | |
2302 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
2303 | list_del_init(&lseg->pls_lc_list); | |
2304 | pnfs_put_lseg(lseg); | |
2305 | } | |
2306 | ||
71244d9b | 2307 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
2308 | } |
2309 | ||
1b0ae068 PT |
2310 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
2311 | { | |
b9e028fd | 2312 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
2313 | } |
2314 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
2315 | ||
863a3c6c | 2316 | void |
67af7611 TM |
2317 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
2318 | loff_t end_pos) | |
863a3c6c | 2319 | { |
cd841605 | 2320 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 2321 | bool mark_as_dirty = false; |
863a3c6c | 2322 | |
cd841605 | 2323 | spin_lock(&inode->i_lock); |
863a3c6c | 2324 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 2325 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 2326 | mark_as_dirty = true; |
863a3c6c | 2327 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 2328 | __func__, inode->i_ino); |
29559b11 TM |
2329 | } else if (end_pos > nfsi->layout->plh_lwb) |
2330 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 2331 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 2332 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 2333 | pnfs_get_lseg(lseg); |
a9bae566 | 2334 | } |
cd841605 | 2335 | spin_unlock(&inode->i_lock); |
acff5880 | 2336 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 2337 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2338 | |
2339 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2340 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2341 | if (mark_as_dirty) | |
cd841605 | 2342 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2343 | } |
2344 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2345 | ||
db29c089 AA |
2346 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2347 | { | |
2348 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2349 | ||
2350 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2351 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2352 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2353 | } |
2354 | ||
de4b15c7 AA |
2355 | /* |
2356 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2357 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2358 | * data to disk to allow the server to recover the data if it crashes. | |
2359 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2360 | * is off, and a COMMIT is sent to a data server, or | |
2361 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2362 | */ | |
863a3c6c | 2363 | int |
ef311537 | 2364 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2365 | { |
5f919c9f | 2366 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2367 | struct nfs4_layoutcommit_data *data; |
2368 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2369 | loff_t end_pos; |
71244d9b | 2370 | int status; |
863a3c6c | 2371 | |
71244d9b | 2372 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2373 | return 0; |
2374 | ||
71244d9b | 2375 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2376 | |
71244d9b | 2377 | status = -EAGAIN; |
92407e75 | 2378 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2379 | if (!sync) |
2380 | goto out; | |
74316201 | 2381 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2382 | NFS_INO_LAYOUTCOMMITTING, |
2383 | nfs_wait_bit_killable, | |
2384 | TASK_KILLABLE); | |
92407e75 | 2385 | if (status) |
71244d9b | 2386 | goto out; |
92407e75 PT |
2387 | } |
2388 | ||
71244d9b TM |
2389 | status = -ENOMEM; |
2390 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2391 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2392 | if (!data) | |
2393 | goto clear_layoutcommitting; | |
2394 | ||
2395 | status = 0; | |
de4b15c7 | 2396 | spin_lock(&inode->i_lock); |
71244d9b TM |
2397 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2398 | goto out_unlock; | |
a9bae566 | 2399 | |
71244d9b | 2400 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2401 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2402 | |
acff5880 | 2403 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 2404 | |
f597c537 | 2405 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2406 | spin_unlock(&inode->i_lock); |
2407 | ||
2408 | data->args.inode = inode; | |
9fa40758 | 2409 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2410 | nfs_fattr_init(&data->fattr); |
2411 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2412 | data->res.fattr = &data->fattr; | |
2413 | data->args.lastbytewritten = end_pos - 1; | |
2414 | data->res.server = NFS_SERVER(inode); | |
2415 | ||
5f919c9f CH |
2416 | if (ld->prepare_layoutcommit) { |
2417 | status = ld->prepare_layoutcommit(&data->args); | |
2418 | if (status) { | |
3471648a | 2419 | put_rpccred(data->cred); |
5f919c9f | 2420 | spin_lock(&inode->i_lock); |
29559b11 TM |
2421 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
2422 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f | 2423 | nfsi->layout->plh_lwb = end_pos; |
3471648a | 2424 | goto out_unlock; |
5f919c9f CH |
2425 | } |
2426 | } | |
2427 | ||
2428 | ||
863a3c6c AA |
2429 | status = nfs4_proc_layoutcommit(data, sync); |
2430 | out: | |
92407e75 PT |
2431 | if (status) |
2432 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2433 | dprintk("<-- %s status %d\n", __func__, status); |
2434 | return status; | |
71244d9b TM |
2435 | out_unlock: |
2436 | spin_unlock(&inode->i_lock); | |
92407e75 | 2437 | kfree(data); |
71244d9b TM |
2438 | clear_layoutcommitting: |
2439 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2440 | goto out; |
863a3c6c | 2441 | } |
72cff449 | 2442 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 2443 | |
5bb89b47 TM |
2444 | int |
2445 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
2446 | { | |
2447 | return pnfs_layoutcommit_inode(inode, true); | |
2448 | } | |
2449 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
2450 | ||
82be417a AA |
2451 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
2452 | { | |
2453 | struct nfs4_threshold *thp; | |
2454 | ||
2455 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2456 | if (!thp) { | |
2457 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2458 | return NULL; | |
2459 | } | |
2460 | return thp; | |
2461 | } | |
8733408d | 2462 | |
865a7ecb | 2463 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d | 2464 | int |
c8ad8894 | 2465 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
8733408d PT |
2466 | { |
2467 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
2468 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 2469 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
2470 | struct nfs42_layoutstat_data *data; |
2471 | struct pnfs_layout_hdr *hdr; | |
2472 | int status = 0; | |
2473 | ||
2474 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
2475 | goto out; | |
2476 | ||
6c5a0d89 TM |
2477 | if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS)) |
2478 | goto out; | |
2479 | ||
1bfe3b25 PT |
2480 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
2481 | goto out; | |
2482 | ||
8733408d PT |
2483 | spin_lock(&inode->i_lock); |
2484 | if (!NFS_I(inode)->layout) { | |
2485 | spin_unlock(&inode->i_lock); | |
f538d0ba | 2486 | goto out_clear_layoutstats; |
8733408d PT |
2487 | } |
2488 | hdr = NFS_I(inode)->layout; | |
2489 | pnfs_get_layout_hdr(hdr); | |
2490 | spin_unlock(&inode->i_lock); | |
2491 | ||
c8ad8894 | 2492 | data = kzalloc(sizeof(*data), gfp_flags); |
8733408d PT |
2493 | if (!data) { |
2494 | status = -ENOMEM; | |
2495 | goto out_put; | |
2496 | } | |
2497 | ||
2498 | data->args.fh = NFS_FH(inode); | |
2499 | data->args.inode = inode; | |
2500 | nfs4_stateid_copy(&data->args.stateid, &hdr->plh_stateid); | |
2501 | status = ld->prepare_layoutstats(&data->args); | |
2502 | if (status) | |
2503 | goto out_free; | |
2504 | ||
2505 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
2506 | ||
2507 | out: | |
2508 | dprintk("%s returns %d\n", __func__, status); | |
2509 | return status; | |
2510 | ||
2511 | out_free: | |
2512 | kfree(data); | |
2513 | out_put: | |
2514 | pnfs_put_layout_hdr(hdr); | |
f538d0ba | 2515 | out_clear_layoutstats: |
1bfe3b25 PT |
2516 | smp_mb__before_atomic(); |
2517 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
2518 | smp_mb__after_atomic(); | |
8733408d PT |
2519 | goto out; |
2520 | } | |
2521 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 2522 | #endif |
bbf58bf3 TM |
2523 | |
2524 | unsigned int layoutstats_timer; | |
2525 | module_param(layoutstats_timer, uint, 0644); | |
2526 | EXPORT_SYMBOL_GPL(layoutstats_timer); |