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85e174ba RL |
1 | /* |
2 | * pNFS functions to call and manage layout drivers. | |
3 | * | |
4 | * Copyright (c) 2002 [year of first publication] | |
5 | * The Regents of the University of Michigan | |
6 | * All Rights Reserved | |
7 | * | |
8 | * Dean Hildebrand <dhildebz@umich.edu> | |
9 | * | |
10 | * Permission is granted to use, copy, create derivative works, and | |
11 | * redistribute this software and such derivative works for any purpose, | |
12 | * so long as the name of the University of Michigan is not used in | |
13 | * any advertising or publicity pertaining to the use or distribution | |
14 | * of this software without specific, written prior authorization. If | |
15 | * the above copyright notice or any other identification of the | |
16 | * University of Michigan is included in any copy of any portion of | |
17 | * this software, then the disclaimer below must also be included. | |
18 | * | |
19 | * This software is provided as is, without representation or warranty | |
20 | * of any kind either express or implied, including without limitation | |
21 | * the implied warranties of merchantability, fitness for a particular | |
22 | * purpose, or noninfringement. The Regents of the University of | |
23 | * Michigan shall not be liable for any damages, including special, | |
24 | * indirect, incidental, or consequential damages, with respect to any | |
25 | * claim arising out of or in connection with the use of the software, | |
26 | * even if it has been or is hereafter advised of the possibility of | |
27 | * such damages. | |
28 | */ | |
29 | ||
30 | #include <linux/nfs_fs.h> | |
493292dd | 31 | #include <linux/nfs_page.h> |
143cb494 | 32 | #include <linux/module.h> |
974cec8c | 33 | #include "internal.h" |
85e174ba | 34 | #include "pnfs.h" |
64419a9b | 35 | #include "iostat.h" |
cc668ab3 | 36 | #include "nfs4trace.h" |
40dd4b7a | 37 | #include "delegation.h" |
8733408d | 38 | #include "nfs42.h" |
85e174ba RL |
39 | |
40 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 41 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 42 | |
02c35fca FI |
43 | /* Locking: |
44 | * | |
45 | * pnfs_spinlock: | |
46 | * protects pnfs_modules_tbl. | |
47 | */ | |
48 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
49 | ||
50 | /* | |
51 | * pnfs_modules_tbl holds all pnfs modules | |
52 | */ | |
53 | static LIST_HEAD(pnfs_modules_tbl); | |
54 | ||
aa1e0e3a | 55 | static int |
ed429d6b | 56 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid, |
6c16605d | 57 | enum pnfs_iomode iomode, bool sync); |
aa1e0e3a | 58 | |
02c35fca FI |
59 | /* Return the registered pnfs layout driver module matching given id */ |
60 | static struct pnfs_layoutdriver_type * | |
61 | find_pnfs_driver_locked(u32 id) | |
62 | { | |
63 | struct pnfs_layoutdriver_type *local; | |
64 | ||
65 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
66 | if (local->id == id) | |
67 | goto out; | |
68 | local = NULL; | |
69 | out: | |
70 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
71 | return local; | |
72 | } | |
73 | ||
85e174ba RL |
74 | static struct pnfs_layoutdriver_type * |
75 | find_pnfs_driver(u32 id) | |
76 | { | |
02c35fca FI |
77 | struct pnfs_layoutdriver_type *local; |
78 | ||
79 | spin_lock(&pnfs_spinlock); | |
80 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
81 | if (local != NULL && !try_module_get(local->owner)) { |
82 | dprintk("%s: Could not grab reference on module\n", __func__); | |
83 | local = NULL; | |
84 | } | |
02c35fca FI |
85 | spin_unlock(&pnfs_spinlock); |
86 | return local; | |
85e174ba RL |
87 | } |
88 | ||
89 | void | |
90 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
91 | { | |
738fd0f3 BH |
92 | if (nfss->pnfs_curr_ld) { |
93 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
94 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
95 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
96 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
97 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 98 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 99 | } |
85e174ba RL |
100 | nfss->pnfs_curr_ld = NULL; |
101 | } | |
102 | ||
103 | /* | |
104 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
105 | * Currently only one pNFS layout driver per filesystem is supported. | |
106 | * | |
107 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. | |
108 | */ | |
109 | void | |
738fd0f3 BH |
110 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
111 | u32 id) | |
85e174ba RL |
112 | { |
113 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
114 | ||
115 | if (id == 0) | |
116 | goto out_no_driver; | |
117 | if (!(server->nfs_client->cl_exchange_flags & | |
118 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
a030889a WAA |
119 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
120 | __func__, id, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
121 | goto out_no_driver; |
122 | } | |
123 | ld_type = find_pnfs_driver(id); | |
124 | if (!ld_type) { | |
125 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); | |
126 | ld_type = find_pnfs_driver(id); | |
127 | if (!ld_type) { | |
128 | dprintk("%s: No pNFS module found for %u.\n", | |
129 | __func__, id); | |
130 | goto out_no_driver; | |
131 | } | |
132 | } | |
133 | server->pnfs_curr_ld = ld_type; | |
738fd0f3 BH |
134 | if (ld_type->set_layoutdriver |
135 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
136 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
137 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
138 | module_put(ld_type->owner); |
139 | goto out_no_driver; | |
140 | } | |
2a4c8994 TM |
141 | /* Bump the MDS count */ |
142 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 143 | |
85e174ba RL |
144 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
145 | return; | |
146 | ||
147 | out_no_driver: | |
148 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
149 | server->pnfs_curr_ld = NULL; | |
150 | } | |
02c35fca FI |
151 | |
152 | int | |
153 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
154 | { | |
155 | int status = -EINVAL; | |
156 | struct pnfs_layoutdriver_type *tmp; | |
157 | ||
158 | if (ld_type->id == 0) { | |
a030889a | 159 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
160 | return status; |
161 | } | |
b1f69b75 | 162 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 163 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
164 | "alloc_lseg and free_lseg.\n", __func__); |
165 | return status; | |
166 | } | |
02c35fca FI |
167 | |
168 | spin_lock(&pnfs_spinlock); | |
169 | tmp = find_pnfs_driver_locked(ld_type->id); | |
170 | if (!tmp) { | |
171 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
172 | status = 0; | |
173 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
174 | ld_type->name); | |
175 | } else { | |
a030889a | 176 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
177 | __func__, ld_type->id); |
178 | } | |
179 | spin_unlock(&pnfs_spinlock); | |
180 | ||
181 | return status; | |
182 | } | |
183 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
184 | ||
185 | void | |
186 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
187 | { | |
188 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
189 | spin_lock(&pnfs_spinlock); | |
190 | list_del(&ld_type->pnfs_tblid); | |
191 | spin_unlock(&pnfs_spinlock); | |
192 | } | |
193 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 194 | |
b1f69b75 AA |
195 | /* |
196 | * pNFS client layout cache | |
197 | */ | |
198 | ||
cc6e5340 | 199 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 200 | void |
70c3bd2b | 201 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 202 | { |
cc6e5340 | 203 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
204 | } |
205 | ||
636fb9c8 BH |
206 | static struct pnfs_layout_hdr * |
207 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
208 | { | |
209 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 210 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
211 | } |
212 | ||
213 | static void | |
214 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
215 | { | |
9c626381 TM |
216 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
217 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
218 | ||
219 | if (!list_empty(&lo->plh_layouts)) { | |
220 | struct nfs_client *clp = server->nfs_client; | |
221 | ||
222 | spin_lock(&clp->cl_lock); | |
223 | list_del_init(&lo->plh_layouts); | |
224 | spin_unlock(&clp->cl_lock); | |
225 | } | |
9fa40758 | 226 | put_rpccred(lo->plh_lc_cred); |
57934278 | 227 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
228 | } |
229 | ||
e5e94017 | 230 | static void |
6622c3ea | 231 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 232 | { |
bb346f63 | 233 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 234 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
235 | nfsi->layout = NULL; |
236 | /* Reset MDS Threshold I/O counters */ | |
237 | nfsi->write_io = 0; | |
238 | nfsi->read_io = 0; | |
e5e94017 BH |
239 | } |
240 | ||
b1f69b75 | 241 | void |
70c3bd2b | 242 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 243 | { |
cc6e5340 FI |
244 | struct inode *inode = lo->plh_inode; |
245 | ||
246 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { | |
566f8737 PT |
247 | if (!list_empty(&lo->plh_segs)) |
248 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 249 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 250 | spin_unlock(&inode->i_lock); |
6622c3ea | 251 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 252 | } |
974cec8c AA |
253 | } |
254 | ||
b9e028fd TM |
255 | static int |
256 | pnfs_iomode_to_fail_bit(u32 iomode) | |
257 | { | |
258 | return iomode == IOMODE_RW ? | |
259 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
260 | } | |
261 | ||
262 | static void | |
3e621214 | 263 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 264 | { |
25c75333 | 265 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 266 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
267 | atomic_inc(&lo->plh_refcount); |
268 | } | |
269 | ||
270 | static void | |
271 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
272 | { | |
273 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
274 | atomic_dec(&lo->plh_refcount); | |
275 | } | |
276 | ||
277 | static void | |
278 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
279 | { | |
280 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
281 | struct pnfs_layout_range range = { |
282 | .iomode = iomode, | |
283 | .offset = 0, | |
284 | .length = NFS4_MAX_UINT64, | |
285 | }; | |
286 | LIST_HEAD(head); | |
3e621214 TM |
287 | |
288 | spin_lock(&inode->i_lock); | |
289 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
115ce575 | 290 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
3e621214 | 291 | spin_unlock(&inode->i_lock); |
115ce575 | 292 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
293 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
294 | iomode == IOMODE_RW ? "RW" : "READ"); | |
295 | } | |
296 | ||
297 | static bool | |
298 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
299 | { | |
25c75333 | 300 | unsigned long start, end; |
3e621214 TM |
301 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
302 | ||
303 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
304 | return false; |
305 | end = jiffies; | |
306 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
307 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
308 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 309 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
310 | return false; |
311 | } | |
312 | return true; | |
b9e028fd TM |
313 | } |
314 | ||
974cec8c AA |
315 | static void |
316 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) | |
317 | { | |
566052c5 | 318 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 319 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c FI |
320 | atomic_set(&lseg->pls_refcount, 1); |
321 | smp_mb(); | |
322 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); | |
566052c5 | 323 | lseg->pls_layout = lo; |
974cec8c AA |
324 | } |
325 | ||
905ca191 | 326 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 327 | { |
b7edfaa1 | 328 | struct inode *ino = lseg->pls_layout->plh_inode; |
974cec8c | 329 | |
b1f69b75 | 330 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
974cec8c AA |
331 | } |
332 | ||
d684d2ae | 333 | static void |
57036a37 TM |
334 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
335 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 336 | { |
57036a37 | 337 | struct inode *inode = lo->plh_inode; |
d684d2ae | 338 | |
d20581aa | 339 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 340 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
341 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
342 | atomic_dec(&lo->plh_refcount); | |
173f77e9 TM |
343 | if (list_empty(&lo->plh_segs)) |
344 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
d684d2ae FI |
345 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
346 | } | |
347 | ||
aa1e0e3a PT |
348 | /* Return true if layoutreturn is needed */ |
349 | static bool | |
350 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo, | |
27b6f539 | 351 | struct pnfs_layout_segment *lseg) |
aa1e0e3a PT |
352 | { |
353 | struct pnfs_layout_segment *s; | |
354 | ||
7f27392c | 355 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) |
aa1e0e3a PT |
356 | return false; |
357 | ||
358 | list_for_each_entry(s, &lo->plh_segs, pls_list) | |
27b6f539 | 359 | if (s != lseg && test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) |
aa1e0e3a PT |
360 | return false; |
361 | ||
aa1e0e3a PT |
362 | return true; |
363 | } | |
364 | ||
7f27392c TM |
365 | static bool |
366 | pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo) | |
367 | { | |
368 | if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
369 | return false; | |
370 | lo->plh_return_iomode = 0; | |
7f27392c TM |
371 | pnfs_get_layout_hdr(lo); |
372 | clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags); | |
373 | return true; | |
374 | } | |
375 | ||
4ef2e4f8 TM |
376 | static void pnfs_layoutreturn_before_put_lseg(struct pnfs_layout_segment *lseg, |
377 | struct pnfs_layout_hdr *lo, struct inode *inode) | |
27b6f539 | 378 | { |
27b6f539 PT |
379 | lo = lseg->pls_layout; |
380 | inode = lo->plh_inode; | |
381 | ||
382 | spin_lock(&inode->i_lock); | |
383 | if (pnfs_layout_need_return(lo, lseg)) { | |
384 | nfs4_stateid stateid; | |
385 | enum pnfs_iomode iomode; | |
7f27392c | 386 | bool send; |
27b6f539 | 387 | |
50f563ef | 388 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
27b6f539 | 389 | iomode = lo->plh_return_iomode; |
7f27392c | 390 | send = pnfs_prepare_layoutreturn(lo); |
27b6f539 | 391 | spin_unlock(&inode->i_lock); |
7f27392c TM |
392 | if (send) { |
393 | /* Send an async layoutreturn so we dont deadlock */ | |
ed429d6b | 394 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); |
7f27392c | 395 | } |
27b6f539 | 396 | } else |
4ef2e4f8 | 397 | spin_unlock(&inode->i_lock); |
27b6f539 PT |
398 | } |
399 | ||
bae724ef | 400 | void |
9369a431 | 401 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 402 | { |
57036a37 | 403 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
404 | struct inode *inode; |
405 | ||
406 | if (!lseg) | |
407 | return; | |
408 | ||
4541d16c FI |
409 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
410 | atomic_read(&lseg->pls_refcount), | |
411 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
4ef2e4f8 TM |
412 | |
413 | /* Handle the case where refcount != 1 */ | |
414 | if (atomic_add_unless(&lseg->pls_refcount, -1, 1)) | |
415 | return; | |
416 | ||
57036a37 TM |
417 | lo = lseg->pls_layout; |
418 | inode = lo->plh_inode; | |
4ef2e4f8 TM |
419 | /* Do we need a layoutreturn? */ |
420 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
421 | pnfs_layoutreturn_before_put_lseg(lseg, lo, inode); | |
422 | ||
d684d2ae | 423 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
faa4a54f TM |
424 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
425 | spin_unlock(&inode->i_lock); | |
426 | return; | |
427 | } | |
8f0d27dc | 428 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 TM |
429 | pnfs_layout_remove_lseg(lo, lseg); |
430 | spin_unlock(&inode->i_lock); | |
431 | pnfs_free_lseg(lseg); | |
432 | pnfs_put_layout_hdr(lo); | |
4541d16c | 433 | } |
4541d16c | 434 | } |
9369a431 | 435 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 436 | |
6543f803 | 437 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
438 | { |
439 | struct pnfs_layout_segment *lseg; | |
6543f803 | 440 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
441 | |
442 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 443 | lo = lseg->pls_layout; |
e6cf82d1 | 444 | |
6543f803 TM |
445 | pnfs_free_lseg(lseg); |
446 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
447 | } |
448 | ||
6543f803 | 449 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 450 | { |
6543f803 | 451 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
452 | schedule_work(&lseg->pls_work); |
453 | } | |
6543f803 TM |
454 | |
455 | void | |
456 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
457 | { | |
458 | if (!lseg) | |
459 | return; | |
460 | ||
461 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
462 | ||
463 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
464 | atomic_read(&lseg->pls_refcount), | |
465 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
466 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
467 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
faa4a54f TM |
468 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) |
469 | return; | |
6543f803 TM |
470 | pnfs_get_layout_hdr(lo); |
471 | pnfs_layout_remove_lseg(lo, lseg); | |
472 | pnfs_free_lseg_async(lseg); | |
473 | } | |
474 | } | |
475 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 476 | |
3cb2df17 | 477 | static u64 |
fb3296eb BH |
478 | end_offset(u64 start, u64 len) |
479 | { | |
480 | u64 end; | |
481 | ||
482 | end = start + len; | |
483 | return end >= start ? end : NFS4_MAX_UINT64; | |
484 | } | |
485 | ||
fb3296eb BH |
486 | /* |
487 | * is l2 fully contained in l1? | |
488 | * start1 end1 | |
489 | * [----------------------------------) | |
490 | * start2 end2 | |
491 | * [----------------) | |
492 | */ | |
3cb2df17 | 493 | static bool |
7dc0ac70 | 494 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 495 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
496 | { |
497 | u64 start1 = l1->offset; | |
498 | u64 end1 = end_offset(start1, l1->length); | |
499 | u64 start2 = l2->offset; | |
500 | u64 end2 = end_offset(start2, l2->length); | |
501 | ||
502 | return (start1 <= start2) && (end1 >= end2); | |
503 | } | |
504 | ||
505 | /* | |
506 | * is l1 and l2 intersecting? | |
507 | * start1 end1 | |
508 | * [----------------------------------) | |
509 | * start2 end2 | |
510 | * [----------------) | |
511 | */ | |
3cb2df17 | 512 | static bool |
7dc0ac70 | 513 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
3cb2df17 | 514 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
515 | { |
516 | u64 start1 = l1->offset; | |
517 | u64 end1 = end_offset(start1, l1->length); | |
518 | u64 start2 = l2->offset; | |
519 | u64 end2 = end_offset(start2, l2->length); | |
520 | ||
521 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && | |
522 | (end2 == NFS4_MAX_UINT64 || end2 > start1); | |
523 | } | |
524 | ||
4541d16c | 525 | static bool |
3cb2df17 TM |
526 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
527 | const struct pnfs_layout_range *recall_range) | |
4541d16c | 528 | { |
778b5502 BH |
529 | return (recall_range->iomode == IOMODE_ANY || |
530 | lseg_range->iomode == recall_range->iomode) && | |
7dc0ac70 | 531 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
974cec8c AA |
532 | } |
533 | ||
24956804 TM |
534 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
535 | struct list_head *tmp_list) | |
536 | { | |
537 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
538 | return false; | |
539 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
540 | list_add(&lseg->pls_list, tmp_list); | |
541 | return true; | |
542 | } | |
543 | ||
4541d16c FI |
544 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
545 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
546 | struct list_head *tmp_list) | |
547 | { | |
548 | int rv = 0; | |
549 | ||
550 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
551 | /* Remove the reference keeping the lseg in the | |
552 | * list. It will now be removed when all | |
553 | * outstanding io is finished. | |
554 | */ | |
d684d2ae FI |
555 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
556 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 557 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 558 | rv = 1; |
4541d16c FI |
559 | } |
560 | return rv; | |
561 | } | |
562 | ||
563 | /* Returns count of number of matching invalid lsegs remaining in list | |
564 | * after call. | |
565 | */ | |
43f1b3da | 566 | int |
49a85061 | 567 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 568 | struct list_head *tmp_list, |
506c0d68 | 569 | const struct pnfs_layout_range *recall_range) |
974cec8c AA |
570 | { |
571 | struct pnfs_layout_segment *lseg, *next; | |
71b39854 | 572 | int remaining = 0; |
974cec8c AA |
573 | |
574 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
575 | ||
8006bfba | 576 | if (list_empty(&lo->plh_segs)) |
38511722 | 577 | return 0; |
4541d16c | 578 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
778b5502 BH |
579 | if (!recall_range || |
580 | should_free_lseg(&lseg->pls_range, recall_range)) { | |
4541d16c FI |
581 | dprintk("%s: freeing lseg %p iomode %d " |
582 | "offset %llu length %llu\n", __func__, | |
583 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, | |
584 | lseg->pls_range.length); | |
71b39854 TM |
585 | if (!mark_lseg_invalid(lseg, tmp_list)) |
586 | remaining++; | |
4541d16c | 587 | } |
71b39854 TM |
588 | dprintk("%s:Return %i\n", __func__, remaining); |
589 | return remaining; | |
974cec8c AA |
590 | } |
591 | ||
f49f9baa | 592 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 593 | void |
4541d16c | 594 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 595 | { |
4541d16c | 596 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
597 | |
598 | if (list_empty(free_me)) | |
599 | return; | |
600 | ||
4541d16c | 601 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 602 | list_del(&lseg->pls_list); |
905ca191 | 603 | pnfs_free_lseg(lseg); |
974cec8c AA |
604 | } |
605 | } | |
606 | ||
e5e94017 BH |
607 | void |
608 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
609 | { | |
610 | struct pnfs_layout_hdr *lo; | |
974cec8c | 611 | LIST_HEAD(tmp_list); |
e5e94017 BH |
612 | |
613 | spin_lock(&nfsi->vfs_inode.i_lock); | |
614 | lo = nfsi->layout; | |
615 | if (lo) { | |
38511722 | 616 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
49a85061 | 617 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
3e621214 TM |
618 | pnfs_get_layout_hdr(lo); |
619 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); | |
620 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
621 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
622 | pnfs_free_lseg_list(&tmp_list); | |
623 | pnfs_put_layout_hdr(lo); | |
624 | } else | |
625 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 626 | } |
041245c8 | 627 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 628 | |
fd9a8d71 TM |
629 | static bool |
630 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
631 | struct list_head *layout_list) | |
974cec8c AA |
632 | { |
633 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 634 | bool ret = false; |
974cec8c | 635 | |
fd9a8d71 TM |
636 | spin_lock(&inode->i_lock); |
637 | lo = NFS_I(inode)->layout; | |
638 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
639 | pnfs_get_layout_hdr(lo); | |
640 | list_add(&lo->plh_bulk_destroy, layout_list); | |
641 | ret = true; | |
642 | } | |
643 | spin_unlock(&inode->i_lock); | |
644 | return ret; | |
645 | } | |
646 | ||
647 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
648 | static int | |
649 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
650 | struct nfs_server *server, | |
651 | struct list_head *layout_list) | |
652 | { | |
653 | struct pnfs_layout_hdr *lo, *next; | |
654 | struct inode *inode; | |
655 | ||
656 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
657 | inode = igrab(lo->plh_inode); | |
658 | if (inode == NULL) | |
659 | continue; | |
660 | list_del_init(&lo->plh_layouts); | |
661 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
662 | continue; | |
663 | rcu_read_unlock(); | |
664 | spin_unlock(&clp->cl_lock); | |
665 | iput(inode); | |
666 | spin_lock(&clp->cl_lock); | |
667 | rcu_read_lock(); | |
668 | return -EAGAIN; | |
669 | } | |
670 | return 0; | |
671 | } | |
672 | ||
673 | static int | |
674 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
675 | bool is_bulk_recall) | |
676 | { | |
677 | struct pnfs_layout_hdr *lo; | |
678 | struct inode *inode; | |
679 | struct pnfs_layout_range range = { | |
680 | .iomode = IOMODE_ANY, | |
681 | .offset = 0, | |
682 | .length = NFS4_MAX_UINT64, | |
683 | }; | |
684 | LIST_HEAD(lseg_list); | |
685 | int ret = 0; | |
686 | ||
687 | while (!list_empty(layout_list)) { | |
688 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
689 | plh_bulk_destroy); | |
690 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
691 | lo->plh_inode->i_ino); | |
692 | inode = lo->plh_inode; | |
7c5d1875 CH |
693 | |
694 | pnfs_layoutcommit_inode(inode, false); | |
695 | ||
fd9a8d71 TM |
696 | spin_lock(&inode->i_lock); |
697 | list_del_init(&lo->plh_bulk_destroy); | |
698 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ | |
699 | if (is_bulk_recall) | |
700 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
701 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) | |
702 | ret = -EAGAIN; | |
703 | spin_unlock(&inode->i_lock); | |
704 | pnfs_free_lseg_list(&lseg_list); | |
b20135d0 TM |
705 | /* Free all lsegs that are attached to commit buckets */ |
706 | nfs_commit_inode(inode, 0); | |
fd9a8d71 TM |
707 | pnfs_put_layout_hdr(lo); |
708 | iput(inode); | |
709 | } | |
710 | return ret; | |
711 | } | |
712 | ||
713 | int | |
714 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
715 | struct nfs_fsid *fsid, | |
716 | bool is_recall) | |
717 | { | |
718 | struct nfs_server *server; | |
719 | LIST_HEAD(layout_list); | |
c47abcf8 | 720 | |
974cec8c | 721 | spin_lock(&clp->cl_lock); |
6382a441 | 722 | rcu_read_lock(); |
fd9a8d71 | 723 | restart: |
6382a441 | 724 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
725 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
726 | continue; | |
727 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
728 | server, | |
729 | &layout_list) != 0) | |
730 | goto restart; | |
6382a441 WAA |
731 | } |
732 | rcu_read_unlock(); | |
974cec8c AA |
733 | spin_unlock(&clp->cl_lock); |
734 | ||
fd9a8d71 TM |
735 | if (list_empty(&layout_list)) |
736 | return 0; | |
737 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
738 | } | |
739 | ||
740 | int | |
741 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
742 | bool is_recall) | |
743 | { | |
744 | struct nfs_server *server; | |
745 | LIST_HEAD(layout_list); | |
746 | ||
747 | spin_lock(&clp->cl_lock); | |
748 | rcu_read_lock(); | |
749 | restart: | |
750 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
751 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
752 | server, | |
753 | &layout_list) != 0) | |
754 | goto restart; | |
974cec8c | 755 | } |
fd9a8d71 TM |
756 | rcu_read_unlock(); |
757 | spin_unlock(&clp->cl_lock); | |
758 | ||
759 | if (list_empty(&layout_list)) | |
760 | return 0; | |
761 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
762 | } | |
763 | ||
764 | /* | |
765 | * Called by the state manger to remove all layouts established under an | |
766 | * expired lease. | |
767 | */ | |
768 | void | |
769 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
770 | { | |
771 | nfs4_deviceid_mark_client_invalid(clp); | |
772 | nfs4_deviceid_purge_client(clp); | |
773 | ||
774 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
775 | } |
776 | ||
5a65503f TM |
777 | /* |
778 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
779 | * taking into account wraparound issues. | |
780 | */ | |
781 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
782 | { | |
2c64c57d | 783 | return (s32)(s1 - s2) > 0; |
5a65503f TM |
784 | } |
785 | ||
fd6002e9 | 786 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
787 | void |
788 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
789 | bool update_barrier) | |
b1f69b75 | 790 | { |
22aaf714 TM |
791 | u32 oldseq, newseq, new_barrier; |
792 | int empty = list_empty(&lo->plh_segs); | |
b1f69b75 | 793 | |
2d2f24ad TM |
794 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
795 | newseq = be32_to_cpu(new->seqid); | |
22aaf714 | 796 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
f597c537 | 797 | nfs4_stateid_copy(&lo->plh_stateid, new); |
43f1b3da | 798 | if (update_barrier) { |
22aaf714 | 799 | new_barrier = be32_to_cpu(new->seqid); |
43f1b3da FI |
800 | } else { |
801 | /* Because of wraparound, we want to keep the barrier | |
22aaf714 | 802 | * "close" to the current seqids. |
43f1b3da | 803 | */ |
22aaf714 | 804 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
43f1b3da | 805 | } |
22aaf714 TM |
806 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
807 | lo->plh_barrier = new_barrier; | |
43f1b3da | 808 | } |
b1f69b75 AA |
809 | } |
810 | ||
cf7d63f1 | 811 | static bool |
19c54aba TM |
812 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
813 | const nfs4_stateid *stateid) | |
43f1b3da | 814 | { |
19c54aba | 815 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 816 | |
19c54aba TM |
817 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
818 | } | |
819 | ||
820 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
821 | static bool | |
e1c06f80 | 822 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo) |
19c54aba | 823 | { |
f7e8917a | 824 | return lo->plh_block_lgets || |
e1c06f80 | 825 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
cf7d63f1 FI |
826 | } |
827 | ||
fd6002e9 FI |
828 | int |
829 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, | |
506c0d68 | 830 | const struct pnfs_layout_range *range, |
fd6002e9 | 831 | struct nfs4_state *open_state) |
b1f69b75 | 832 | { |
fd6002e9 | 833 | int status = 0; |
974cec8c | 834 | |
b1f69b75 | 835 | dprintk("--> %s\n", __func__); |
fd6002e9 | 836 | spin_lock(&lo->plh_inode->i_lock); |
e1c06f80 | 837 | if (pnfs_layoutgets_blocked(lo)) { |
cf7d63f1 | 838 | status = -EAGAIN; |
5d422301 TM |
839 | } else if (!nfs4_valid_open_stateid(open_state)) { |
840 | status = -EBADF; | |
47abadef CH |
841 | } else if (list_empty(&lo->plh_segs) || |
842 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { | |
fd6002e9 FI |
843 | int seq; |
844 | ||
845 | do { | |
846 | seq = read_seqbegin(&open_state->seqlock); | |
f597c537 | 847 | nfs4_stateid_copy(dst, &open_state->stateid); |
fd6002e9 FI |
848 | } while (read_seqretry(&open_state->seqlock, seq)); |
849 | } else | |
f597c537 | 850 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
fd6002e9 | 851 | spin_unlock(&lo->plh_inode->i_lock); |
b1f69b75 | 852 | dprintk("<-- %s\n", __func__); |
fd6002e9 | 853 | return status; |
b1f69b75 AA |
854 | } |
855 | ||
856 | /* | |
857 | * Get layout from server. | |
858 | * for now, assume that whole file layouts are requested. | |
859 | * arg->offset: 0 | |
860 | * arg->length: all ones | |
861 | */ | |
e5e94017 BH |
862 | static struct pnfs_layout_segment * |
863 | send_layoutget(struct pnfs_layout_hdr *lo, | |
864 | struct nfs_open_context *ctx, | |
e144e539 | 865 | const struct pnfs_layout_range *range, |
a75b9df9 | 866 | gfp_t gfp_flags) |
e5e94017 | 867 | { |
b7edfaa1 | 868 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
869 | struct nfs_server *server = NFS_SERVER(ino); |
870 | struct nfs4_layoutget *lgp; | |
a0b0a6e3 | 871 | struct pnfs_layout_segment *lseg; |
2d89a1d3 | 872 | loff_t i_size; |
b1f69b75 AA |
873 | |
874 | dprintk("--> %s\n", __func__); | |
e5e94017 | 875 | |
4f2e9dce JL |
876 | /* |
877 | * Synchronously retrieve layout information from server and | |
878 | * store in lseg. If we race with a concurrent seqid morphing | |
879 | * op, then re-send the LAYOUTGET. | |
880 | */ | |
881 | do { | |
882 | lgp = kzalloc(sizeof(*lgp), gfp_flags); | |
883 | if (lgp == NULL) | |
884 | return NULL; | |
885 | ||
886 | i_size = i_size_read(ino); | |
887 | ||
888 | lgp->args.minlength = PAGE_CACHE_SIZE; | |
889 | if (lgp->args.minlength > range->length) | |
890 | lgp->args.minlength = range->length; | |
891 | if (range->iomode == IOMODE_READ) { | |
892 | if (range->offset >= i_size) | |
893 | lgp->args.minlength = 0; | |
894 | else if (i_size - range->offset < lgp->args.minlength) | |
895 | lgp->args.minlength = i_size - range->offset; | |
896 | } | |
897 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; | |
e144e539 | 898 | pnfs_copy_range(&lgp->args.range, range); |
4f2e9dce JL |
899 | lgp->args.type = server->pnfs_curr_ld->id; |
900 | lgp->args.inode = ino; | |
901 | lgp->args.ctx = get_nfs_open_context(ctx); | |
902 | lgp->gfp_flags = gfp_flags; | |
903 | lgp->cred = lo->plh_lc_cred; | |
35124a09 | 904 | |
4f2e9dce JL |
905 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
906 | } while (lseg == ERR_PTR(-EAGAIN)); | |
2d89a1d3 | 907 | |
0bcbf039 PT |
908 | if (IS_ERR(lseg) && !nfs_error_is_fatal(PTR_ERR(lseg))) |
909 | lseg = NULL; | |
910 | else | |
d67ae825 TH |
911 | pnfs_layout_clear_fail_bit(lo, |
912 | pnfs_iomode_to_fail_bit(range->iomode)); | |
35124a09 | 913 | |
974cec8c AA |
914 | return lseg; |
915 | } | |
916 | ||
24956804 TM |
917 | static void pnfs_clear_layoutcommit(struct inode *inode, |
918 | struct list_head *head) | |
919 | { | |
920 | struct nfs_inode *nfsi = NFS_I(inode); | |
921 | struct pnfs_layout_segment *lseg, *tmp; | |
922 | ||
923 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
924 | return; | |
925 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
926 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
927 | continue; | |
928 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
929 | } | |
930 | } | |
931 | ||
d67ae825 TH |
932 | void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
933 | { | |
934 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
935 | smp_mb__after_atomic(); | |
936 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
7f27392c | 937 | rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); |
d67ae825 TH |
938 | } |
939 | ||
f40eb5d0 | 940 | static int |
ed429d6b | 941 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid, |
6c16605d | 942 | enum pnfs_iomode iomode, bool sync) |
f40eb5d0 PT |
943 | { |
944 | struct inode *ino = lo->plh_inode; | |
945 | struct nfs4_layoutreturn *lrp; | |
946 | int status = 0; | |
947 | ||
e4af440a | 948 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
949 | if (unlikely(lrp == NULL)) { |
950 | status = -ENOMEM; | |
951 | spin_lock(&ino->i_lock); | |
d67ae825 | 952 | pnfs_clear_layoutreturn_waitbit(lo); |
f40eb5d0 PT |
953 | spin_unlock(&ino->i_lock); |
954 | pnfs_put_layout_hdr(lo); | |
955 | goto out; | |
956 | } | |
957 | ||
ed429d6b | 958 | nfs4_stateid_copy(&lrp->args.stateid, stateid); |
f40eb5d0 PT |
959 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
960 | lrp->args.inode = ino; | |
15eb67c1 PT |
961 | lrp->args.range.iomode = iomode; |
962 | lrp->args.range.offset = 0; | |
963 | lrp->args.range.length = NFS4_MAX_UINT64; | |
f40eb5d0 PT |
964 | lrp->args.layout = lo; |
965 | lrp->clp = NFS_SERVER(ino)->nfs_client; | |
966 | lrp->cred = lo->plh_lc_cred; | |
967 | ||
6c16605d | 968 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
969 | out: |
970 | dprintk("<-- %s status: %d\n", __func__, status); | |
971 | return status; | |
972 | } | |
973 | ||
293b3b06 AA |
974 | /* |
975 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
976 | * when the layout segment list is empty. | |
977 | * | |
978 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
979 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
980 | * deviceid is marked invalid. | |
981 | */ | |
cbe82603 BH |
982 | int |
983 | _pnfs_return_layout(struct inode *ino) | |
984 | { | |
985 | struct pnfs_layout_hdr *lo = NULL; | |
986 | struct nfs_inode *nfsi = NFS_I(ino); | |
987 | LIST_HEAD(tmp_list); | |
cbe82603 | 988 | nfs4_stateid stateid; |
293b3b06 | 989 | int status = 0, empty; |
7f27392c | 990 | bool send; |
cbe82603 | 991 | |
366d5052 | 992 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
993 | |
994 | spin_lock(&ino->i_lock); | |
995 | lo = nfsi->layout; | |
e5929f3c | 996 | if (!lo) { |
cbe82603 | 997 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
998 | dprintk("NFS: %s no layout to return\n", __func__); |
999 | goto out; | |
cbe82603 | 1000 | } |
50f563ef | 1001 | nfs4_stateid_copy(&stateid, &nfsi->layout->plh_stateid); |
cbe82603 | 1002 | /* Reference matched in nfs4_layoutreturn_release */ |
70c3bd2b | 1003 | pnfs_get_layout_hdr(lo); |
293b3b06 | 1004 | empty = list_empty(&lo->plh_segs); |
24956804 | 1005 | pnfs_clear_layoutcommit(ino, &tmp_list); |
49a85061 | 1006 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
c88953d8 CH |
1007 | |
1008 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
1009 | struct pnfs_layout_range range = { | |
1010 | .iomode = IOMODE_ANY, | |
1011 | .offset = 0, | |
1012 | .length = NFS4_MAX_UINT64, | |
1013 | }; | |
1014 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1015 | } | |
1016 | ||
293b3b06 AA |
1017 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
1018 | if (empty) { | |
1019 | spin_unlock(&ino->i_lock); | |
293b3b06 | 1020 | dprintk("NFS: %s no layout segments to return\n", __func__); |
7f27392c | 1021 | goto out_put_layout_hdr; |
293b3b06 | 1022 | } |
47abadef CH |
1023 | |
1024 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
7f27392c | 1025 | send = pnfs_prepare_layoutreturn(lo); |
cbe82603 BH |
1026 | spin_unlock(&ino->i_lock); |
1027 | pnfs_free_lseg_list(&tmp_list); | |
7f27392c | 1028 | if (send) |
ed429d6b | 1029 | status = pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
7f27392c TM |
1030 | out_put_layout_hdr: |
1031 | pnfs_put_layout_hdr(lo); | |
cbe82603 BH |
1032 | out: |
1033 | dprintk("<-- %s status: %d\n", __func__, status); | |
1034 | return status; | |
1035 | } | |
0a57cdac | 1036 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 1037 | |
24028672 TM |
1038 | int |
1039 | pnfs_commit_and_return_layout(struct inode *inode) | |
1040 | { | |
1041 | struct pnfs_layout_hdr *lo; | |
1042 | int ret; | |
1043 | ||
1044 | spin_lock(&inode->i_lock); | |
1045 | lo = NFS_I(inode)->layout; | |
1046 | if (lo == NULL) { | |
1047 | spin_unlock(&inode->i_lock); | |
1048 | return 0; | |
1049 | } | |
1050 | pnfs_get_layout_hdr(lo); | |
1051 | /* Block new layoutgets and read/write to ds */ | |
1052 | lo->plh_block_lgets++; | |
1053 | spin_unlock(&inode->i_lock); | |
1054 | filemap_fdatawait(inode->i_mapping); | |
1055 | ret = pnfs_layoutcommit_inode(inode, true); | |
1056 | if (ret == 0) | |
1057 | ret = _pnfs_return_layout(inode); | |
1058 | spin_lock(&inode->i_lock); | |
1059 | lo->plh_block_lgets--; | |
1060 | spin_unlock(&inode->i_lock); | |
1061 | pnfs_put_layout_hdr(lo); | |
1062 | return ret; | |
1063 | } | |
1064 | ||
f7e8917a FI |
1065 | bool pnfs_roc(struct inode *ino) |
1066 | { | |
40dd4b7a TM |
1067 | struct nfs_inode *nfsi = NFS_I(ino); |
1068 | struct nfs_open_context *ctx; | |
1069 | struct nfs4_state *state; | |
f7e8917a FI |
1070 | struct pnfs_layout_hdr *lo; |
1071 | struct pnfs_layout_segment *lseg, *tmp; | |
193e3aa2 | 1072 | nfs4_stateid stateid; |
f7e8917a | 1073 | LIST_HEAD(tmp_list); |
e755d638 | 1074 | bool found = false, layoutreturn = false, roc = false; |
f7e8917a FI |
1075 | |
1076 | spin_lock(&ino->i_lock); | |
40dd4b7a | 1077 | lo = nfsi->layout; |
3976143b | 1078 | if (!lo || test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
40dd4b7a TM |
1079 | goto out_noroc; |
1080 | ||
e755d638 | 1081 | /* no roc if we hold a delegation */ |
40dd4b7a TM |
1082 | if (nfs4_check_delegation(ino, FMODE_READ)) |
1083 | goto out_noroc; | |
1084 | ||
1085 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1086 | state = ctx->state; | |
1087 | /* Don't return layout if there is open file state */ | |
1088 | if (state != NULL && state->state != 0) | |
1089 | goto out_noroc; | |
1090 | } | |
1091 | ||
50f563ef | 1092 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
e755d638 PT |
1093 | /* always send layoutreturn if being marked so */ |
1094 | if (test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, | |
1095 | &lo->plh_flags)) | |
1096 | layoutreturn = pnfs_prepare_layoutreturn(lo); | |
1097 | ||
f7e8917a | 1098 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
e755d638 PT |
1099 | /* If we are sending layoutreturn, invalidate all valid lsegs */ |
1100 | if (layoutreturn || test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { | |
f7e8917a FI |
1101 | mark_lseg_invalid(lseg, &tmp_list); |
1102 | found = true; | |
1103 | } | |
500d701f | 1104 | /* ROC in two conditions: |
e755d638 PT |
1105 | * 1. there are ROC lsegs |
1106 | * 2. we don't send layoutreturn | |
e755d638 | 1107 | */ |
500d701f PT |
1108 | if (found && !layoutreturn) { |
1109 | /* lo ref dropped in pnfs_roc_release() */ | |
1110 | pnfs_get_layout_hdr(lo); | |
e755d638 | 1111 | roc = true; |
500d701f | 1112 | } |
f7e8917a | 1113 | |
40dd4b7a | 1114 | out_noroc: |
f7e8917a | 1115 | spin_unlock(&ino->i_lock); |
e755d638 PT |
1116 | pnfs_free_lseg_list(&tmp_list); |
1117 | pnfs_layoutcommit_inode(ino, true); | |
1118 | if (layoutreturn) | |
ed429d6b | 1119 | pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
e755d638 | 1120 | return roc; |
f7e8917a FI |
1121 | } |
1122 | ||
1123 | void pnfs_roc_release(struct inode *ino) | |
1124 | { | |
1125 | struct pnfs_layout_hdr *lo; | |
1126 | ||
1127 | spin_lock(&ino->i_lock); | |
1128 | lo = NFS_I(ino)->layout; | |
5c4a79fb | 1129 | pnfs_clear_layoutreturn_waitbit(lo); |
6622c3ea TM |
1130 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
1131 | pnfs_detach_layout_hdr(lo); | |
1132 | spin_unlock(&ino->i_lock); | |
1133 | pnfs_free_layout_hdr(lo); | |
1134 | } else | |
1135 | spin_unlock(&ino->i_lock); | |
f7e8917a FI |
1136 | } |
1137 | ||
1138 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
1139 | { | |
1140 | struct pnfs_layout_hdr *lo; | |
1141 | ||
1142 | spin_lock(&ino->i_lock); | |
1143 | lo = NFS_I(ino)->layout; | |
0654cc72 | 1144 | pnfs_mark_layout_returned_if_empty(lo); |
0f35ad6f | 1145 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
f7e8917a FI |
1146 | lo->plh_barrier = barrier; |
1147 | spin_unlock(&ino->i_lock); | |
6a463beb | 1148 | trace_nfs4_layoutreturn_on_close(ino, 0); |
f7e8917a FI |
1149 | } |
1150 | ||
4ff376fe | 1151 | void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier) |
f7e8917a FI |
1152 | { |
1153 | struct nfs_inode *nfsi = NFS_I(ino); | |
7fdab069 | 1154 | struct pnfs_layout_hdr *lo; |
7fdab069 | 1155 | u32 current_seqid; |
f7e8917a FI |
1156 | |
1157 | spin_lock(&ino->i_lock); | |
7fdab069 TM |
1158 | lo = nfsi->layout; |
1159 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); | |
f7e8917a | 1160 | |
7fdab069 TM |
1161 | /* Since close does not return a layout stateid for use as |
1162 | * a barrier, we choose the worst-case barrier. | |
1163 | */ | |
1164 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); | |
f7e8917a | 1165 | spin_unlock(&ino->i_lock); |
f7e8917a FI |
1166 | } |
1167 | ||
500d701f PT |
1168 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
1169 | { | |
1170 | struct nfs_inode *nfsi = NFS_I(ino); | |
1171 | struct pnfs_layout_hdr *lo; | |
1172 | bool sleep = false; | |
1173 | ||
1174 | /* we might not have grabbed lo reference. so need to check under | |
1175 | * i_lock */ | |
1176 | spin_lock(&ino->i_lock); | |
1177 | lo = nfsi->layout; | |
1178 | if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
1179 | sleep = true; | |
1180 | spin_unlock(&ino->i_lock); | |
1181 | ||
1182 | if (sleep) | |
1183 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
1184 | ||
1185 | return sleep; | |
1186 | } | |
1187 | ||
b1f69b75 AA |
1188 | /* |
1189 | * Compare two layout segments for sorting into layout cache. | |
1190 | * We want to preferentially return RW over RO layouts, so ensure those | |
1191 | * are seen first. | |
1192 | */ | |
1193 | static s64 | |
7dc0ac70 | 1194 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1195 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1196 | { |
fb3296eb BH |
1197 | s64 d; |
1198 | ||
1199 | /* high offset > low offset */ | |
1200 | d = l1->offset - l2->offset; | |
1201 | if (d) | |
1202 | return d; | |
1203 | ||
1204 | /* short length > long length */ | |
1205 | d = l2->length - l1->length; | |
1206 | if (d) | |
1207 | return d; | |
1208 | ||
b1f69b75 | 1209 | /* read > read/write */ |
fb3296eb | 1210 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1211 | } |
1212 | ||
03772d2f TM |
1213 | static bool |
1214 | pnfs_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
1215 | const struct pnfs_layout_range *l2) | |
1216 | { | |
1217 | return pnfs_lseg_range_cmp(l1, l2) > 0; | |
1218 | } | |
1219 | ||
1220 | static bool | |
1221 | pnfs_lseg_no_merge(struct pnfs_layout_segment *lseg, | |
1222 | struct pnfs_layout_segment *old) | |
1223 | { | |
1224 | return false; | |
1225 | } | |
1226 | ||
1227 | void | |
1228 | pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1229 | struct pnfs_layout_segment *lseg, | |
1230 | bool (*is_after)(const struct pnfs_layout_range *, | |
1231 | const struct pnfs_layout_range *), | |
1232 | bool (*do_merge)(struct pnfs_layout_segment *, | |
1233 | struct pnfs_layout_segment *), | |
1234 | struct list_head *free_me) | |
974cec8c | 1235 | { |
03772d2f | 1236 | struct pnfs_layout_segment *lp, *tmp; |
b1f69b75 | 1237 | |
974cec8c AA |
1238 | dprintk("%s:Begin\n", __func__); |
1239 | ||
03772d2f TM |
1240 | list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) { |
1241 | if (test_bit(NFS_LSEG_VALID, &lp->pls_flags) == 0) | |
1242 | continue; | |
1243 | if (do_merge(lseg, lp)) { | |
1244 | mark_lseg_invalid(lp, free_me); | |
1245 | continue; | |
1246 | } | |
1247 | if (is_after(&lseg->pls_range, &lp->pls_range)) | |
b1f69b75 | 1248 | continue; |
566052c5 | 1249 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1250 | dprintk("%s: inserted lseg %p " |
1251 | "iomode %d offset %llu length %llu before " | |
1252 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1253 | __func__, lseg, lseg->pls_range.iomode, |
1254 | lseg->pls_range.offset, lseg->pls_range.length, | |
1255 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1256 | lp->pls_range.length); | |
fb3296eb | 1257 | goto out; |
974cec8c | 1258 | } |
fb3296eb BH |
1259 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1260 | dprintk("%s: inserted lseg %p " | |
1261 | "iomode %d offset %llu length %llu at tail\n", | |
1262 | __func__, lseg, lseg->pls_range.iomode, | |
1263 | lseg->pls_range.offset, lseg->pls_range.length); | |
1264 | out: | |
70c3bd2b | 1265 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1266 | |
1267 | dprintk("%s:Return\n", __func__); | |
e5e94017 | 1268 | } |
03772d2f TM |
1269 | EXPORT_SYMBOL_GPL(pnfs_generic_layout_insert_lseg); |
1270 | ||
1271 | static void | |
1272 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1273 | struct pnfs_layout_segment *lseg, | |
1274 | struct list_head *free_me) | |
1275 | { | |
1276 | struct inode *inode = lo->plh_inode; | |
1277 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
1278 | ||
1279 | if (ld->add_lseg != NULL) | |
1280 | ld->add_lseg(lo, lseg, free_me); | |
1281 | else | |
1282 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
1283 | pnfs_lseg_range_is_after, | |
1284 | pnfs_lseg_no_merge, | |
1285 | free_me); | |
1286 | } | |
e5e94017 BH |
1287 | |
1288 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1289 | alloc_init_layout_hdr(struct inode *ino, |
1290 | struct nfs_open_context *ctx, | |
1291 | gfp_t gfp_flags) | |
e5e94017 BH |
1292 | { |
1293 | struct pnfs_layout_hdr *lo; | |
1294 | ||
636fb9c8 | 1295 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1296 | if (!lo) |
1297 | return NULL; | |
cc6e5340 | 1298 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1299 | INIT_LIST_HEAD(&lo->plh_layouts); |
1300 | INIT_LIST_HEAD(&lo->plh_segs); | |
fd9a8d71 | 1301 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1302 | lo->plh_inode = ino; |
5cc2216d | 1303 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
e5e94017 BH |
1304 | return lo; |
1305 | } | |
1306 | ||
1307 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1308 | pnfs_find_alloc_layout(struct inode *ino, |
1309 | struct nfs_open_context *ctx, | |
1310 | gfp_t gfp_flags) | |
e5e94017 BH |
1311 | { |
1312 | struct nfs_inode *nfsi = NFS_I(ino); | |
1313 | struct pnfs_layout_hdr *new = NULL; | |
1314 | ||
1315 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1316 | ||
251ec410 TM |
1317 | if (nfsi->layout != NULL) |
1318 | goto out_existing; | |
e5e94017 | 1319 | spin_unlock(&ino->i_lock); |
9fa40758 | 1320 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1321 | spin_lock(&ino->i_lock); |
1322 | ||
251ec410 | 1323 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1324 | nfsi->layout = new; |
251ec410 | 1325 | return new; |
7175fe90 YN |
1326 | } else if (new != NULL) |
1327 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1328 | out_existing: |
1329 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1330 | return nfsi->layout; |
1331 | } | |
1332 | ||
b1f69b75 AA |
1333 | /* |
1334 | * iomode matching rules: | |
1335 | * iomode lseg match | |
1336 | * ----- ----- ----- | |
1337 | * ANY READ true | |
1338 | * ANY RW true | |
1339 | * RW READ false | |
1340 | * RW RW true | |
1341 | * READ READ true | |
1342 | * READ RW true | |
1343 | */ | |
3cb2df17 | 1344 | static bool |
7dc0ac70 | 1345 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
3cb2df17 | 1346 | const struct pnfs_layout_range *range) |
b1f69b75 | 1347 | { |
fb3296eb BH |
1348 | struct pnfs_layout_range range1; |
1349 | ||
1350 | if ((range->iomode == IOMODE_RW && | |
1351 | ls_range->iomode != IOMODE_RW) || | |
7dc0ac70 | 1352 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1353 | return 0; |
1354 | ||
1355 | /* range1 covers only the first byte in the range */ | |
1356 | range1 = *range; | |
1357 | range1.length = 1; | |
7dc0ac70 | 1358 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1359 | } |
1360 | ||
1361 | /* | |
1362 | * lookup range in layout | |
1363 | */ | |
e5e94017 | 1364 | static struct pnfs_layout_segment * |
fb3296eb BH |
1365 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
1366 | struct pnfs_layout_range *range) | |
e5e94017 | 1367 | { |
b1f69b75 AA |
1368 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1369 | ||
1370 | dprintk("%s:Begin\n", __func__); | |
1371 | ||
b7edfaa1 | 1372 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1373 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1374 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
7dc0ac70 | 1375 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
9369a431 | 1376 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1377 | break; |
1378 | } | |
b1f69b75 AA |
1379 | } |
1380 | ||
1381 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1382 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1383 | return ret; |
e5e94017 BH |
1384 | } |
1385 | ||
d23d61c8 AA |
1386 | /* |
1387 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1388 | * to the MDS or over pNFS | |
1389 | * | |
1390 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1391 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1392 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1393 | * WRITE request. | |
1394 | * | |
1395 | * A return of true means use MDS I/O. | |
1396 | * | |
1397 | * From rfc 5661: | |
1398 | * If a file's size is smaller than the file size threshold, data accesses | |
1399 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1400 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1401 | * server. If both file size and I/O size are provided, the client SHOULD | |
1402 | * reach or exceed both thresholds before sending its read or write | |
1403 | * requests to the data server. | |
1404 | */ | |
1405 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1406 | struct inode *ino, int iomode) | |
1407 | { | |
1408 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1409 | struct nfs_inode *nfsi = NFS_I(ino); | |
1410 | loff_t fsize = i_size_read(ino); | |
1411 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1412 | ||
1413 | if (t == NULL) | |
1414 | return ret; | |
1415 | ||
1416 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1417 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1418 | ||
1419 | switch (iomode) { | |
1420 | case IOMODE_READ: | |
1421 | if (t->bm & THRESHOLD_RD) { | |
1422 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1423 | size_set = true; | |
1424 | if (fsize < t->rd_sz) | |
1425 | size = true; | |
1426 | } | |
1427 | if (t->bm & THRESHOLD_RD_IO) { | |
1428 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1429 | nfsi->read_io); | |
1430 | io_set = true; | |
1431 | if (nfsi->read_io < t->rd_io_sz) | |
1432 | io = true; | |
1433 | } | |
1434 | break; | |
1435 | case IOMODE_RW: | |
1436 | if (t->bm & THRESHOLD_WR) { | |
1437 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1438 | size_set = true; | |
1439 | if (fsize < t->wr_sz) | |
1440 | size = true; | |
1441 | } | |
1442 | if (t->bm & THRESHOLD_WR_IO) { | |
1443 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1444 | nfsi->write_io); | |
1445 | io_set = true; | |
1446 | if (nfsi->write_io < t->wr_io_sz) | |
1447 | io = true; | |
1448 | } | |
1449 | break; | |
1450 | } | |
1451 | if (size_set && io_set) { | |
1452 | if (size && io) | |
1453 | ret = true; | |
1454 | } else if (size || io) | |
1455 | ret = true; | |
1456 | ||
1457 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1458 | return ret; | |
1459 | } | |
1460 | ||
aa8a45ee PT |
1461 | static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) |
1462 | { | |
1463 | /* | |
1464 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1465 | * reference | |
1466 | */ | |
1467 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
1468 | return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
2e5b29f0 | 1469 | nfs_wait_bit_killable, |
aa8a45ee PT |
1470 | TASK_UNINTERRUPTIBLE); |
1471 | } | |
1472 | ||
d67ae825 TH |
1473 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1474 | { | |
1475 | unsigned long *bitlock = &lo->plh_flags; | |
1476 | ||
1477 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1478 | smp_mb__after_atomic(); | |
1479 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1480 | } | |
1481 | ||
e5e94017 BH |
1482 | /* |
1483 | * Layout segment is retreived from the server if not cached. | |
1484 | * The appropriate layout segment is referenced and returned to the caller. | |
1485 | */ | |
7c24d948 | 1486 | struct pnfs_layout_segment * |
e5e94017 BH |
1487 | pnfs_update_layout(struct inode *ino, |
1488 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1489 | loff_t pos, |
1490 | u64 count, | |
a75b9df9 TM |
1491 | enum pnfs_iomode iomode, |
1492 | gfp_t gfp_flags) | |
e5e94017 | 1493 | { |
fb3296eb BH |
1494 | struct pnfs_layout_range arg = { |
1495 | .iomode = iomode, | |
1496 | .offset = pos, | |
1497 | .length = count, | |
1498 | }; | |
707ed5fd | 1499 | unsigned pg_offset; |
6382a441 WAA |
1500 | struct nfs_server *server = NFS_SERVER(ino); |
1501 | struct nfs_client *clp = server->nfs_client; | |
e5e94017 BH |
1502 | struct pnfs_layout_hdr *lo; |
1503 | struct pnfs_layout_segment *lseg = NULL; | |
30005121 | 1504 | bool first; |
e5e94017 | 1505 | |
9a4bf31d | 1506 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) { |
f4848303 | 1507 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1508 | PNFS_UPDATE_LAYOUT_NO_PNFS); |
f86bbcf8 | 1509 | goto out; |
9a4bf31d | 1510 | } |
d23d61c8 | 1511 | |
9a4bf31d | 1512 | if (iomode == IOMODE_READ && i_size_read(ino) == 0) { |
f4848303 | 1513 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1514 | PNFS_UPDATE_LAYOUT_RD_ZEROLEN); |
4ae93560 | 1515 | goto out; |
9a4bf31d | 1516 | } |
4ae93560 | 1517 | |
9a4bf31d | 1518 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { |
f4848303 | 1519 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1520 | PNFS_UPDATE_LAYOUT_MDSTHRESH); |
f86bbcf8 | 1521 | goto out; |
9a4bf31d | 1522 | } |
d23d61c8 | 1523 | |
9bf87482 PT |
1524 | lookup_again: |
1525 | first = false; | |
e5e94017 | 1526 | spin_lock(&ino->i_lock); |
9fa40758 | 1527 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1528 | if (lo == NULL) { |
1529 | spin_unlock(&ino->i_lock); | |
f4848303 | 1530 | trace_pnfs_update_layout(ino, pos, count, iomode, NULL, |
9a4bf31d | 1531 | PNFS_UPDATE_LAYOUT_NOMEM); |
830ffb56 TM |
1532 | goto out; |
1533 | } | |
e5e94017 | 1534 | |
43f1b3da | 1535 | /* Do we even need to bother with this? */ |
a59c30ac | 1536 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
f4848303 | 1537 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1538 | PNFS_UPDATE_LAYOUT_BULK_RECALL); |
43f1b3da | 1539 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1540 | goto out_unlock; |
1541 | } | |
1542 | ||
1543 | /* if LAYOUTGET already failed once we don't try again */ | |
2e5b29f0 | 1544 | if (pnfs_layout_io_test_failed(lo, iomode)) { |
f4848303 | 1545 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1546 | PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); |
e5e94017 | 1547 | goto out_unlock; |
9a4bf31d | 1548 | } |
e5e94017 | 1549 | |
9bf87482 PT |
1550 | first = list_empty(&lo->plh_segs); |
1551 | if (first) { | |
1552 | /* The first layoutget for the file. Need to serialize per | |
1553 | * RFC 5661 Errata 3208. | |
1554 | */ | |
1555 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1556 | &lo->plh_flags)) { | |
1557 | spin_unlock(&ino->i_lock); | |
1558 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1559 | TASK_UNINTERRUPTIBLE); | |
1560 | pnfs_put_layout_hdr(lo); | |
1561 | goto lookup_again; | |
1562 | } | |
1563 | } else { | |
1564 | /* Check to see if the layout for the given range | |
1565 | * already exists | |
1566 | */ | |
1567 | lseg = pnfs_find_lseg(lo, &arg); | |
9a4bf31d | 1568 | if (lseg) { |
f4848303 | 1569 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1570 | PNFS_UPDATE_LAYOUT_FOUND_CACHED); |
9bf87482 | 1571 | goto out_unlock; |
9a4bf31d | 1572 | } |
9bf87482 | 1573 | } |
568e8c49 | 1574 | |
aa8a45ee PT |
1575 | /* |
1576 | * Because we free lsegs before sending LAYOUTRETURN, we need to wait | |
1577 | * for LAYOUTRETURN even if first is true. | |
1578 | */ | |
8f70f53a | 1579 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
aa8a45ee PT |
1580 | spin_unlock(&ino->i_lock); |
1581 | dprintk("%s wait for layoutreturn\n", __func__); | |
1582 | if (pnfs_prepare_to_retry_layoutget(lo)) { | |
d67ae825 TH |
1583 | if (first) |
1584 | pnfs_clear_first_layoutget(lo); | |
aa8a45ee PT |
1585 | pnfs_put_layout_hdr(lo); |
1586 | dprintk("%s retrying\n", __func__); | |
1587 | goto lookup_again; | |
1588 | } | |
f4848303 | 1589 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1590 | PNFS_UPDATE_LAYOUT_RETURN); |
aa8a45ee PT |
1591 | goto out_put_layout_hdr; |
1592 | } | |
1593 | ||
9a4bf31d | 1594 | if (pnfs_layoutgets_blocked(lo)) { |
f4848303 | 1595 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1596 | PNFS_UPDATE_LAYOUT_BLOCKED); |
cf7d63f1 | 1597 | goto out_unlock; |
9a4bf31d | 1598 | } |
cf7d63f1 | 1599 | atomic_inc(&lo->plh_outstanding); |
f49f9baa | 1600 | spin_unlock(&ino->i_lock); |
30005121 | 1601 | |
abb9a007 | 1602 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1603 | /* The lo must be on the clp list if there is any |
1604 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1605 | */ | |
1606 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1607 | if (list_empty(&lo->plh_layouts)) |
1608 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1609 | spin_unlock(&clp->cl_lock); |
1610 | } | |
e5e94017 | 1611 | |
707ed5fd BH |
1612 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
1613 | if (pg_offset) { | |
1614 | arg.offset -= pg_offset; | |
1615 | arg.length += pg_offset; | |
1616 | } | |
7c24d948 AA |
1617 | if (arg.length != NFS4_MAX_UINT64) |
1618 | arg.length = PAGE_CACHE_ALIGN(arg.length); | |
707ed5fd | 1619 | |
fb3296eb | 1620 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
cf7d63f1 | 1621 | atomic_dec(&lo->plh_outstanding); |
f4848303 | 1622 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
9a4bf31d | 1623 | PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); |
830ffb56 | 1624 | out_put_layout_hdr: |
d67ae825 TH |
1625 | if (first) |
1626 | pnfs_clear_first_layoutget(lo); | |
70c3bd2b | 1627 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1628 | out: |
f86bbcf8 TM |
1629 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1630 | "(%s, offset: %llu, length: %llu)\n", | |
1631 | __func__, ino->i_sb->s_id, | |
1632 | (unsigned long long)NFS_FILEID(ino), | |
d600ad1f | 1633 | IS_ERR_OR_NULL(lseg) ? "not found" : "found", |
f86bbcf8 TM |
1634 | iomode==IOMODE_RW ? "read/write" : "read-only", |
1635 | (unsigned long long)pos, | |
1636 | (unsigned long long)count); | |
e5e94017 BH |
1637 | return lseg; |
1638 | out_unlock: | |
1639 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1640 | goto out_put_layout_hdr; |
e5e94017 | 1641 | } |
7c24d948 | 1642 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1643 | |
540d9864 TM |
1644 | static bool |
1645 | pnfs_sanity_check_layout_range(struct pnfs_layout_range *range) | |
1646 | { | |
1647 | switch (range->iomode) { | |
1648 | case IOMODE_READ: | |
1649 | case IOMODE_RW: | |
1650 | break; | |
1651 | default: | |
1652 | return false; | |
1653 | } | |
1654 | if (range->offset == NFS4_MAX_UINT64) | |
1655 | return false; | |
1656 | if (range->length == 0) | |
1657 | return false; | |
1658 | if (range->length != NFS4_MAX_UINT64 && | |
1659 | range->length > NFS4_MAX_UINT64 - range->offset) | |
1660 | return false; | |
1661 | return true; | |
1662 | } | |
1663 | ||
a0b0a6e3 | 1664 | struct pnfs_layout_segment * |
b1f69b75 AA |
1665 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1666 | { | |
1667 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1668 | struct nfs4_layoutget_res *res = &lgp->res; | |
1669 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1670 | struct inode *ino = lo->plh_inode; |
78096cca | 1671 | LIST_HEAD(free_me); |
540d9864 TM |
1672 | int status = -EINVAL; |
1673 | ||
1674 | if (!pnfs_sanity_check_layout_range(&res->range)) | |
1675 | goto out; | |
b1f69b75 AA |
1676 | |
1677 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1678 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
b1f69b75 AA |
1679 | if (!lseg || IS_ERR(lseg)) { |
1680 | if (!lseg) | |
1681 | status = -ENOMEM; | |
1682 | else | |
1683 | status = PTR_ERR(lseg); | |
1684 | dprintk("%s: Could not allocate layout: error %d\n", | |
1685 | __func__, status); | |
1686 | goto out; | |
1687 | } | |
1688 | ||
1013df61 CH |
1689 | init_lseg(lo, lseg); |
1690 | lseg->pls_range = res->range; | |
1691 | ||
b1f69b75 | 1692 | spin_lock(&ino->i_lock); |
e1c06f80 | 1693 | if (pnfs_layoutgets_blocked(lo)) { |
43f1b3da FI |
1694 | dprintk("%s forget reply due to state\n", __func__); |
1695 | goto out_forget_reply; | |
1696 | } | |
038d6493 | 1697 | |
362f7474 CH |
1698 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
1699 | /* existing state ID, make sure the sequence number matches. */ | |
1700 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1701 | dprintk("%s forget reply due to sequence\n", __func__); | |
4f2e9dce | 1702 | status = -EAGAIN; |
362f7474 CH |
1703 | goto out_forget_reply; |
1704 | } | |
1705 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1706 | } else { | |
1707 | /* | |
1708 | * We got an entirely new state ID. Mark all segments for the | |
1709 | * inode invalid, and don't bother validating the stateid | |
1710 | * sequence number. | |
1711 | */ | |
1712 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); | |
1713 | ||
1714 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); | |
1715 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); | |
1716 | } | |
038d6493 | 1717 | |
47abadef CH |
1718 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
1719 | ||
9369a431 | 1720 | pnfs_get_lseg(lseg); |
03772d2f | 1721 | pnfs_layout_insert_lseg(lo, lseg, &free_me); |
b1f69b75 | 1722 | |
3976143b | 1723 | if (res->return_on_close) |
f7e8917a | 1724 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
f7e8917a | 1725 | |
b1f69b75 | 1726 | spin_unlock(&ino->i_lock); |
78096cca | 1727 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1728 | return lseg; |
b1f69b75 | 1729 | out: |
a0b0a6e3 | 1730 | return ERR_PTR(status); |
43f1b3da FI |
1731 | |
1732 | out_forget_reply: | |
1733 | spin_unlock(&ino->i_lock); | |
1734 | lseg->pls_layout = lo; | |
1735 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1736 | goto out; | |
b1f69b75 AA |
1737 | } |
1738 | ||
016256df | 1739 | static void |
5c97f5de TM |
1740 | pnfs_set_plh_return_iomode(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode) |
1741 | { | |
1742 | if (lo->plh_return_iomode == iomode) | |
1743 | return; | |
1744 | if (lo->plh_return_iomode != 0) | |
1745 | iomode = IOMODE_ANY; | |
1746 | lo->plh_return_iomode = iomode; | |
1747 | } | |
1748 | ||
10335556 | 1749 | int |
016256df PT |
1750 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
1751 | struct list_head *tmp_list, | |
506c0d68 | 1752 | const struct pnfs_layout_range *return_range) |
016256df PT |
1753 | { |
1754 | struct pnfs_layout_segment *lseg, *next; | |
10335556 | 1755 | int remaining = 0; |
016256df PT |
1756 | |
1757 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
1758 | ||
1759 | if (list_empty(&lo->plh_segs)) | |
10335556 | 1760 | return 0; |
016256df | 1761 | |
fc7ff367 | 1762 | assert_spin_locked(&lo->plh_inode->i_lock); |
016256df PT |
1763 | |
1764 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
1765 | if (should_free_lseg(&lseg->pls_range, return_range)) { | |
1766 | dprintk("%s: marking lseg %p iomode %d " | |
1767 | "offset %llu length %llu\n", __func__, | |
1768 | lseg, lseg->pls_range.iomode, | |
1769 | lseg->pls_range.offset, | |
1770 | lseg->pls_range.length); | |
1771 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
5c97f5de | 1772 | pnfs_set_plh_return_iomode(lo, return_range->iomode); |
10335556 TM |
1773 | if (!mark_lseg_invalid(lseg, tmp_list)) |
1774 | remaining++; | |
0bdb8fa6 TM |
1775 | set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, |
1776 | &lo->plh_flags); | |
016256df | 1777 | } |
10335556 | 1778 | return remaining; |
016256df PT |
1779 | } |
1780 | ||
1781 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
1782 | struct pnfs_layout_segment *lseg) | |
1783 | { | |
1784 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
016256df PT |
1785 | struct pnfs_layout_range range = { |
1786 | .iomode = lseg->pls_range.iomode, | |
1787 | .offset = 0, | |
1788 | .length = NFS4_MAX_UINT64, | |
1789 | }; | |
1790 | LIST_HEAD(free_me); | |
10335556 | 1791 | bool return_now = false; |
016256df PT |
1792 | |
1793 | spin_lock(&inode->i_lock); | |
5c97f5de | 1794 | pnfs_set_plh_return_iomode(lo, range.iomode); |
016256df PT |
1795 | /* |
1796 | * mark all matching lsegs so that we are sure to have no live | |
1797 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
1798 | * for how it works. | |
1799 | */ | |
10335556 TM |
1800 | if (!pnfs_mark_matching_lsegs_return(lo, &free_me, &range)) { |
1801 | nfs4_stateid stateid; | |
1802 | enum pnfs_iomode iomode = lo->plh_return_iomode; | |
1803 | ||
1804 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); | |
1805 | return_now = pnfs_prepare_layoutreturn(lo); | |
1806 | spin_unlock(&inode->i_lock); | |
1807 | if (return_now) | |
1808 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
1809 | } else { | |
1810 | spin_unlock(&inode->i_lock); | |
1811 | nfs_commit_inode(inode, 0); | |
1812 | } | |
016256df PT |
1813 | pnfs_free_lseg_list(&free_me); |
1814 | } | |
1815 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
1816 | ||
d8007d4d TM |
1817 | void |
1818 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
1819 | { | |
1fd937bd PT |
1820 | u64 rd_size = req->wb_bytes; |
1821 | ||
cb5d04bc PT |
1822 | if (pgio->pg_lseg == NULL) { |
1823 | if (pgio->pg_dreq == NULL) | |
1824 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
1825 | else | |
1826 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
1827 | ||
1828 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
1829 | req->wb_context, | |
1830 | req_offset(req), | |
1831 | rd_size, | |
1832 | IOMODE_READ, | |
1833 | GFP_KERNEL); | |
d600ad1f PT |
1834 | if (IS_ERR(pgio->pg_lseg)) { |
1835 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1836 | pgio->pg_lseg = NULL; | |
1837 | return; | |
1838 | } | |
cb5d04bc | 1839 | } |
e885de1a TM |
1840 | /* If no lseg, fall back to read through mds */ |
1841 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1842 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 1843 | |
d8007d4d TM |
1844 | } |
1845 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
1846 | ||
1847 | void | |
6296556f PT |
1848 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
1849 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 1850 | { |
d600ad1f | 1851 | if (pgio->pg_lseg == NULL) { |
cb5d04bc PT |
1852 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
1853 | req->wb_context, | |
1854 | req_offset(req), | |
1855 | wb_size, | |
1856 | IOMODE_RW, | |
1857 | GFP_NOFS); | |
d600ad1f PT |
1858 | if (IS_ERR(pgio->pg_lseg)) { |
1859 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
1860 | pgio->pg_lseg = NULL; | |
1861 | return; | |
1862 | } | |
1863 | } | |
e885de1a TM |
1864 | /* If no lseg, fall back to write through mds */ |
1865 | if (pgio->pg_lseg == NULL) | |
1f945357 | 1866 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
1867 | } |
1868 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
1869 | ||
180bb5ec WAA |
1870 | void |
1871 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
1872 | { | |
1873 | if (desc->pg_lseg) { | |
1874 | pnfs_put_lseg(desc->pg_lseg); | |
1875 | desc->pg_lseg = NULL; | |
1876 | } | |
1877 | } | |
1878 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
1879 | ||
b4fdac1a WAA |
1880 | /* |
1881 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
1882 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
1883 | */ | |
1884 | size_t | |
a7d42ddb WAA |
1885 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
1886 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 1887 | { |
0f9c429e | 1888 | unsigned int size; |
c5e20cb7 | 1889 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
1890 | |
1891 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
1892 | if (!size) |
1893 | return 0; | |
94ad1c80 | 1894 | |
19982ba8 | 1895 | /* |
c5e20cb7 WAA |
1896 | * 'size' contains the number of bytes left in the current page (up |
1897 | * to the original size asked for in @req->wb_bytes). | |
1898 | * | |
1899 | * Calculate how many bytes are left in the layout segment | |
1900 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
1901 | * |
1902 | * Please also note that 'end_offset' is actually the offset of the | |
1903 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
1904 | * | |
1905 | */ | |
19b54848 | 1906 | if (pgio->pg_lseg) { |
c5e20cb7 WAA |
1907 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
1908 | pgio->pg_lseg->pls_range.length); | |
1909 | req_start = req_offset(req); | |
7c13789e | 1910 | WARN_ON_ONCE(req_start >= seg_end); |
c5e20cb7 | 1911 | /* start of request is past the last byte of this segment */ |
7c13789e WAA |
1912 | if (req_start >= seg_end) { |
1913 | /* reference the new lseg */ | |
1914 | if (pgio->pg_ops->pg_cleanup) | |
1915 | pgio->pg_ops->pg_cleanup(pgio); | |
1916 | if (pgio->pg_ops->pg_init) | |
1917 | pgio->pg_ops->pg_init(pgio, req); | |
19b54848 | 1918 | return 0; |
7c13789e | 1919 | } |
c5e20cb7 WAA |
1920 | |
1921 | /* adjust 'size' iff there are fewer bytes left in the | |
1922 | * segment than what nfs_generic_pg_test returned */ | |
1923 | seg_left = seg_end - req_start; | |
1924 | if (seg_left < size) | |
1925 | size = (unsigned int)seg_left; | |
19b54848 | 1926 | } |
0f9c429e | 1927 | |
19b54848 | 1928 | return size; |
94ad1c80 | 1929 | } |
89a58e32 | 1930 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 1931 | |
53113ad3 | 1932 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
1933 | { |
1934 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
1935 | |
1936 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
1937 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
1938 | hdr->completion_ops); | |
c7070113 | 1939 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 1940 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 1941 | } |
e7dd79af | 1942 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 1943 | |
d45f60c6 | 1944 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 1945 | { |
cd841605 FI |
1946 | |
1947 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
1948 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 1949 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 1950 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 1951 | } |
6c75dc0d | 1952 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 1953 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
1954 | } |
1955 | ||
d20581aa BH |
1956 | /* |
1957 | * Called by non rpc-based layout drivers | |
1958 | */ | |
d45f60c6 | 1959 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 1960 | { |
f8417b48 | 1961 | if (likely(!hdr->pnfs_error)) { |
67af7611 TM |
1962 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
1963 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 1964 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
1965 | } |
1966 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); | |
1967 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
1968 | pnfs_ld_handle_write_error(hdr); |
1969 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 1970 | } |
d20581aa | 1971 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 1972 | |
dce81290 TM |
1973 | static void |
1974 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 1975 | struct nfs_pgio_header *hdr) |
dce81290 | 1976 | { |
48d635f1 | 1977 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 1978 | |
6c75dc0d | 1979 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 1980 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 1981 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 1982 | mirror->pg_recoalesce = 1; |
6c75dc0d | 1983 | } |
d45f60c6 | 1984 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 1985 | hdr->release(hdr); |
dce81290 TM |
1986 | } |
1987 | ||
1988 | static enum pnfs_try_status | |
d45f60c6 | 1989 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
1990 | const struct rpc_call_ops *call_ops, |
1991 | struct pnfs_layout_segment *lseg, | |
1992 | int how) | |
0382b744 | 1993 | { |
cd841605 | 1994 | struct inode *inode = hdr->inode; |
0382b744 AA |
1995 | enum pnfs_try_status trypnfs; |
1996 | struct nfs_server *nfss = NFS_SERVER(inode); | |
1997 | ||
cd841605 | 1998 | hdr->mds_ops = call_ops; |
0382b744 AA |
1999 | |
2000 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
2001 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
2002 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 2003 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 2004 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
2005 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2006 | return trypnfs; | |
2007 | } | |
2008 | ||
dce81290 | 2009 | static void |
7f714720 WAA |
2010 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
2011 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 2012 | { |
dce81290 TM |
2013 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2014 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2015 | enum pnfs_try_status trypnfs; |
dce81290 | 2016 | |
d45f60c6 | 2017 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 2018 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 2019 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
2020 | } |
2021 | ||
6c75dc0d FI |
2022 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
2023 | { | |
9369a431 | 2024 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2025 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
2026 | } |
2027 | ||
dce81290 TM |
2028 | int |
2029 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
2030 | { | |
6c75dc0d | 2031 | struct nfs_pgio_header *hdr; |
dce81290 TM |
2032 | int ret; |
2033 | ||
1e7f3a48 WAA |
2034 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2035 | if (!hdr) { | |
2bff2288 PT |
2036 | desc->pg_error = -ENOMEM; |
2037 | return desc->pg_error; | |
dce81290 | 2038 | } |
6c75dc0d | 2039 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 2040 | |
9369a431 | 2041 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2042 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2043 | if (!ret) |
7f714720 | 2044 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 2045 | |
6c75dc0d | 2046 | return ret; |
dce81290 TM |
2047 | } |
2048 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
2049 | ||
53113ad3 | 2050 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
2051 | { |
2052 | struct nfs_pageio_descriptor pgio; | |
2053 | ||
1acbbb4e | 2054 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
2055 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
2056 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 2057 | } |
e7dd79af | 2058 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 2059 | |
d45f60c6 | 2060 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2061 | { |
cd841605 FI |
2062 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
2063 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2064 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2065 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2066 | } |
4db6e0b7 | 2067 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2068 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
2069 | } |
2070 | ||
d20581aa BH |
2071 | /* |
2072 | * Called by non rpc-based layout drivers | |
2073 | */ | |
d45f60c6 | 2074 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 2075 | { |
cd841605 | 2076 | if (likely(!hdr->pnfs_error)) { |
d45f60c6 WAA |
2077 | __nfs4_read_done_cb(hdr); |
2078 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); | |
f8417b48 KM |
2079 | } |
2080 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); | |
2081 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2082 | pnfs_ld_handle_read_error(hdr); |
2083 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
2084 | } |
2085 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
2086 | ||
493292dd TM |
2087 | static void |
2088 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2089 | struct nfs_pgio_header *hdr) |
493292dd | 2090 | { |
48d635f1 | 2091 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2092 | |
4db6e0b7 | 2093 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2094 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 2095 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 2096 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 2097 | } |
d45f60c6 | 2098 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2099 | hdr->release(hdr); |
493292dd TM |
2100 | } |
2101 | ||
64419a9b AA |
2102 | /* |
2103 | * Call the appropriate parallel I/O subsystem read function. | |
2104 | */ | |
493292dd | 2105 | static enum pnfs_try_status |
d45f60c6 | 2106 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2107 | const struct rpc_call_ops *call_ops, |
2108 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2109 | { |
cd841605 | 2110 | struct inode *inode = hdr->inode; |
64419a9b AA |
2111 | struct nfs_server *nfss = NFS_SERVER(inode); |
2112 | enum pnfs_try_status trypnfs; | |
2113 | ||
cd841605 | 2114 | hdr->mds_ops = call_ops; |
64419a9b AA |
2115 | |
2116 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2117 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2118 | |
d45f60c6 | 2119 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2120 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2121 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2122 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2123 | return trypnfs; | |
2124 | } | |
863a3c6c | 2125 | |
ceb11e13 PT |
2126 | /* Resend all requests through pnfs. */ |
2127 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) | |
2128 | { | |
2129 | struct nfs_pageio_descriptor pgio; | |
2130 | ||
2131 | nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); | |
2132 | return nfs_pageio_resend(&pgio, hdr); | |
2133 | } | |
2134 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2135 | ||
493292dd | 2136 | static void |
7f714720 | 2137 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2138 | { |
493292dd TM |
2139 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2140 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2141 | enum pnfs_try_status trypnfs; |
ceb11e13 | 2142 | int err = 0; |
493292dd | 2143 | |
d45f60c6 | 2144 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 PT |
2145 | if (trypnfs == PNFS_TRY_AGAIN) |
2146 | err = pnfs_read_resend_pnfs(hdr); | |
2147 | if (trypnfs == PNFS_NOT_ATTEMPTED || err) | |
d45f60c6 | 2148 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
2149 | } |
2150 | ||
4db6e0b7 FI |
2151 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
2152 | { | |
9369a431 | 2153 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2154 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
2155 | } |
2156 | ||
493292dd TM |
2157 | int |
2158 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
2159 | { | |
4db6e0b7 | 2160 | struct nfs_pgio_header *hdr; |
493292dd TM |
2161 | int ret; |
2162 | ||
1e7f3a48 WAA |
2163 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2164 | if (!hdr) { | |
2bff2288 PT |
2165 | desc->pg_error = -ENOMEM; |
2166 | return desc->pg_error; | |
493292dd | 2167 | } |
4db6e0b7 | 2168 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 2169 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2170 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2171 | if (!ret) |
7f714720 | 2172 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 2173 | return ret; |
493292dd TM |
2174 | } |
2175 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
2176 | ||
71244d9b TM |
2177 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
2178 | { | |
2179 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
2180 | ||
2181 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 2182 | smp_mb__after_atomic(); |
71244d9b TM |
2183 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
2184 | } | |
2185 | ||
863a3c6c | 2186 | /* |
a9bae566 | 2187 | * There can be multiple RW segments. |
863a3c6c | 2188 | */ |
a9bae566 | 2189 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 2190 | { |
a9bae566 | 2191 | struct pnfs_layout_segment *lseg; |
863a3c6c | 2192 | |
a9bae566 PT |
2193 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
2194 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 2195 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
2196 | list_add(&lseg->pls_lc_list, listp); |
2197 | } | |
863a3c6c AA |
2198 | } |
2199 | ||
a073dbff TM |
2200 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
2201 | { | |
2202 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
2203 | |
2204 | /* Matched by references in pnfs_set_layoutcommit */ | |
2205 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
2206 | list_del_init(&lseg->pls_lc_list); | |
2207 | pnfs_put_lseg(lseg); | |
2208 | } | |
2209 | ||
71244d9b | 2210 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
2211 | } |
2212 | ||
1b0ae068 PT |
2213 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
2214 | { | |
b9e028fd | 2215 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
2216 | } |
2217 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
2218 | ||
863a3c6c | 2219 | void |
67af7611 TM |
2220 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
2221 | loff_t end_pos) | |
863a3c6c | 2222 | { |
cd841605 | 2223 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 2224 | bool mark_as_dirty = false; |
863a3c6c | 2225 | |
cd841605 | 2226 | spin_lock(&inode->i_lock); |
863a3c6c | 2227 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 2228 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 2229 | mark_as_dirty = true; |
863a3c6c | 2230 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 2231 | __func__, inode->i_ino); |
29559b11 TM |
2232 | } else if (end_pos > nfsi->layout->plh_lwb) |
2233 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 2234 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 2235 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 2236 | pnfs_get_lseg(lseg); |
a9bae566 | 2237 | } |
cd841605 | 2238 | spin_unlock(&inode->i_lock); |
acff5880 | 2239 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 2240 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2241 | |
2242 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2243 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2244 | if (mark_as_dirty) | |
cd841605 | 2245 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2246 | } |
2247 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2248 | ||
db29c089 AA |
2249 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2250 | { | |
2251 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2252 | ||
2253 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2254 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2255 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2256 | } |
2257 | ||
de4b15c7 AA |
2258 | /* |
2259 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2260 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2261 | * data to disk to allow the server to recover the data if it crashes. | |
2262 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2263 | * is off, and a COMMIT is sent to a data server, or | |
2264 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2265 | */ | |
863a3c6c | 2266 | int |
ef311537 | 2267 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2268 | { |
5f919c9f | 2269 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2270 | struct nfs4_layoutcommit_data *data; |
2271 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2272 | loff_t end_pos; |
71244d9b | 2273 | int status; |
863a3c6c | 2274 | |
71244d9b | 2275 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2276 | return 0; |
2277 | ||
71244d9b | 2278 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2279 | |
71244d9b | 2280 | status = -EAGAIN; |
92407e75 | 2281 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2282 | if (!sync) |
2283 | goto out; | |
74316201 | 2284 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2285 | NFS_INO_LAYOUTCOMMITTING, |
2286 | nfs_wait_bit_killable, | |
2287 | TASK_KILLABLE); | |
92407e75 | 2288 | if (status) |
71244d9b | 2289 | goto out; |
92407e75 PT |
2290 | } |
2291 | ||
71244d9b TM |
2292 | status = -ENOMEM; |
2293 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2294 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2295 | if (!data) | |
2296 | goto clear_layoutcommitting; | |
2297 | ||
2298 | status = 0; | |
de4b15c7 | 2299 | spin_lock(&inode->i_lock); |
71244d9b TM |
2300 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2301 | goto out_unlock; | |
a9bae566 | 2302 | |
71244d9b | 2303 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2304 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2305 | |
acff5880 | 2306 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 2307 | |
f597c537 | 2308 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2309 | spin_unlock(&inode->i_lock); |
2310 | ||
2311 | data->args.inode = inode; | |
9fa40758 | 2312 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2313 | nfs_fattr_init(&data->fattr); |
2314 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2315 | data->res.fattr = &data->fattr; | |
2316 | data->args.lastbytewritten = end_pos - 1; | |
2317 | data->res.server = NFS_SERVER(inode); | |
2318 | ||
5f919c9f CH |
2319 | if (ld->prepare_layoutcommit) { |
2320 | status = ld->prepare_layoutcommit(&data->args); | |
2321 | if (status) { | |
3471648a | 2322 | put_rpccred(data->cred); |
5f919c9f | 2323 | spin_lock(&inode->i_lock); |
29559b11 TM |
2324 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
2325 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f | 2326 | nfsi->layout->plh_lwb = end_pos; |
3471648a | 2327 | goto out_unlock; |
5f919c9f CH |
2328 | } |
2329 | } | |
2330 | ||
2331 | ||
863a3c6c AA |
2332 | status = nfs4_proc_layoutcommit(data, sync); |
2333 | out: | |
92407e75 PT |
2334 | if (status) |
2335 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2336 | dprintk("<-- %s status %d\n", __func__, status); |
2337 | return status; | |
71244d9b TM |
2338 | out_unlock: |
2339 | spin_unlock(&inode->i_lock); | |
92407e75 | 2340 | kfree(data); |
71244d9b TM |
2341 | clear_layoutcommitting: |
2342 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2343 | goto out; |
863a3c6c | 2344 | } |
72cff449 | 2345 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 2346 | |
5bb89b47 TM |
2347 | int |
2348 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
2349 | { | |
2350 | return pnfs_layoutcommit_inode(inode, true); | |
2351 | } | |
2352 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
2353 | ||
82be417a AA |
2354 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
2355 | { | |
2356 | struct nfs4_threshold *thp; | |
2357 | ||
2358 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2359 | if (!thp) { | |
2360 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2361 | return NULL; | |
2362 | } | |
2363 | return thp; | |
2364 | } | |
8733408d | 2365 | |
865a7ecb | 2366 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d | 2367 | int |
c8ad8894 | 2368 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
8733408d PT |
2369 | { |
2370 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
2371 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 2372 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
2373 | struct nfs42_layoutstat_data *data; |
2374 | struct pnfs_layout_hdr *hdr; | |
2375 | int status = 0; | |
2376 | ||
2377 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
2378 | goto out; | |
2379 | ||
6c5a0d89 TM |
2380 | if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS)) |
2381 | goto out; | |
2382 | ||
1bfe3b25 PT |
2383 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
2384 | goto out; | |
2385 | ||
8733408d PT |
2386 | spin_lock(&inode->i_lock); |
2387 | if (!NFS_I(inode)->layout) { | |
2388 | spin_unlock(&inode->i_lock); | |
2389 | goto out; | |
2390 | } | |
2391 | hdr = NFS_I(inode)->layout; | |
2392 | pnfs_get_layout_hdr(hdr); | |
2393 | spin_unlock(&inode->i_lock); | |
2394 | ||
c8ad8894 | 2395 | data = kzalloc(sizeof(*data), gfp_flags); |
8733408d PT |
2396 | if (!data) { |
2397 | status = -ENOMEM; | |
2398 | goto out_put; | |
2399 | } | |
2400 | ||
2401 | data->args.fh = NFS_FH(inode); | |
2402 | data->args.inode = inode; | |
2403 | nfs4_stateid_copy(&data->args.stateid, &hdr->plh_stateid); | |
2404 | status = ld->prepare_layoutstats(&data->args); | |
2405 | if (status) | |
2406 | goto out_free; | |
2407 | ||
2408 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
2409 | ||
2410 | out: | |
2411 | dprintk("%s returns %d\n", __func__, status); | |
2412 | return status; | |
2413 | ||
2414 | out_free: | |
2415 | kfree(data); | |
2416 | out_put: | |
2417 | pnfs_put_layout_hdr(hdr); | |
1bfe3b25 PT |
2418 | smp_mb__before_atomic(); |
2419 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
2420 | smp_mb__after_atomic(); | |
8733408d PT |
2421 | goto out; |
2422 | } | |
2423 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 2424 | #endif |
bbf58bf3 TM |
2425 | |
2426 | unsigned int layoutstats_timer; | |
2427 | module_param(layoutstats_timer, uint, 0644); | |
2428 | EXPORT_SYMBOL_GPL(layoutstats_timer); |