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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> |
ca440c38 | 33 | #include <linux/sort.h> |
974cec8c | 34 | #include "internal.h" |
85e174ba | 35 | #include "pnfs.h" |
64419a9b | 36 | #include "iostat.h" |
cc668ab3 | 37 | #include "nfs4trace.h" |
40dd4b7a | 38 | #include "delegation.h" |
8733408d | 39 | #include "nfs42.h" |
85e174ba RL |
40 | |
41 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 42 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 43 | |
02c35fca FI |
44 | /* Locking: |
45 | * | |
46 | * pnfs_spinlock: | |
47 | * protects pnfs_modules_tbl. | |
48 | */ | |
49 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
50 | ||
51 | /* | |
52 | * pnfs_modules_tbl holds all pnfs modules | |
53 | */ | |
54 | static LIST_HEAD(pnfs_modules_tbl); | |
55 | ||
13c13a6a | 56 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo); |
68f74479 TM |
57 | static void pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo, |
58 | struct list_head *free_me, | |
59 | const struct pnfs_layout_range *range, | |
60 | u32 seq); | |
fe1cf946 TM |
61 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
62 | struct list_head *tmp_list); | |
aa1e0e3a | 63 | |
02c35fca FI |
64 | /* Return the registered pnfs layout driver module matching given id */ |
65 | static struct pnfs_layoutdriver_type * | |
66 | find_pnfs_driver_locked(u32 id) | |
67 | { | |
68 | struct pnfs_layoutdriver_type *local; | |
69 | ||
70 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
71 | if (local->id == id) | |
72 | goto out; | |
73 | local = NULL; | |
74 | out: | |
75 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
76 | return local; | |
77 | } | |
78 | ||
85e174ba RL |
79 | static struct pnfs_layoutdriver_type * |
80 | find_pnfs_driver(u32 id) | |
81 | { | |
02c35fca FI |
82 | struct pnfs_layoutdriver_type *local; |
83 | ||
84 | spin_lock(&pnfs_spinlock); | |
85 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
86 | if (local != NULL && !try_module_get(local->owner)) { |
87 | dprintk("%s: Could not grab reference on module\n", __func__); | |
88 | local = NULL; | |
89 | } | |
02c35fca FI |
90 | spin_unlock(&pnfs_spinlock); |
91 | return local; | |
85e174ba RL |
92 | } |
93 | ||
94 | void | |
95 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
96 | { | |
738fd0f3 BH |
97 | if (nfss->pnfs_curr_ld) { |
98 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
99 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
100 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
101 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
102 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 103 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 104 | } |
85e174ba RL |
105 | nfss->pnfs_curr_ld = NULL; |
106 | } | |
107 | ||
ca440c38 JL |
108 | /* |
109 | * When the server sends a list of layout types, we choose one in the order | |
110 | * given in the list below. | |
111 | * | |
112 | * FIXME: should this list be configurable in some fashion? module param? | |
113 | * mount option? something else? | |
114 | */ | |
115 | static const u32 ld_prefs[] = { | |
116 | LAYOUT_SCSI, | |
117 | LAYOUT_BLOCK_VOLUME, | |
118 | LAYOUT_OSD2_OBJECTS, | |
119 | LAYOUT_FLEX_FILES, | |
120 | LAYOUT_NFSV4_1_FILES, | |
121 | 0 | |
122 | }; | |
123 | ||
124 | static int | |
125 | ld_cmp(const void *e1, const void *e2) | |
126 | { | |
127 | u32 ld1 = *((u32 *)e1); | |
128 | u32 ld2 = *((u32 *)e2); | |
129 | int i; | |
130 | ||
131 | for (i = 0; ld_prefs[i] != 0; i++) { | |
132 | if (ld1 == ld_prefs[i]) | |
133 | return -1; | |
134 | ||
135 | if (ld2 == ld_prefs[i]) | |
136 | return 1; | |
137 | } | |
138 | return 0; | |
139 | } | |
140 | ||
85e174ba RL |
141 | /* |
142 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
143 | * Currently only one pNFS layout driver per filesystem is supported. | |
144 | * | |
3132e49e | 145 | * @ids array of layout types supported by MDS. |
85e174ba RL |
146 | */ |
147 | void | |
738fd0f3 | 148 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
ca440c38 | 149 | struct nfs_fsinfo *fsinfo) |
85e174ba RL |
150 | { |
151 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
3132e49e | 152 | u32 id; |
ca440c38 | 153 | int i; |
85e174ba | 154 | |
19274716 AS |
155 | if (fsinfo->nlayouttypes == 0) |
156 | goto out_no_driver; | |
85e174ba RL |
157 | if (!(server->nfs_client->cl_exchange_flags & |
158 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
3132e49e JL |
159 | printk(KERN_ERR "NFS: %s: cl_exchange_flags 0x%x\n", |
160 | __func__, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
161 | goto out_no_driver; |
162 | } | |
3132e49e | 163 | |
ca440c38 JL |
164 | sort(fsinfo->layouttype, fsinfo->nlayouttypes, |
165 | sizeof(*fsinfo->layouttype), ld_cmp, NULL); | |
3132e49e | 166 | |
ca440c38 JL |
167 | for (i = 0; i < fsinfo->nlayouttypes; i++) { |
168 | id = fsinfo->layouttype[i]; | |
85e174ba | 169 | ld_type = find_pnfs_driver(id); |
ca440c38 JL |
170 | if (!ld_type) { |
171 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, | |
172 | id); | |
173 | ld_type = find_pnfs_driver(id); | |
174 | } | |
175 | if (ld_type) | |
176 | break; | |
85e174ba | 177 | } |
3132e49e JL |
178 | |
179 | if (!ld_type) { | |
ca440c38 | 180 | dprintk("%s: No pNFS module found!\n", __func__); |
3132e49e JL |
181 | goto out_no_driver; |
182 | } | |
183 | ||
85e174ba | 184 | server->pnfs_curr_ld = ld_type; |
738fd0f3 BH |
185 | if (ld_type->set_layoutdriver |
186 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
187 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
188 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
189 | module_put(ld_type->owner); |
190 | goto out_no_driver; | |
191 | } | |
2a4c8994 TM |
192 | /* Bump the MDS count */ |
193 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 194 | |
85e174ba RL |
195 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
196 | return; | |
197 | ||
198 | out_no_driver: | |
199 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
200 | server->pnfs_curr_ld = NULL; | |
201 | } | |
02c35fca FI |
202 | |
203 | int | |
204 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
205 | { | |
206 | int status = -EINVAL; | |
207 | struct pnfs_layoutdriver_type *tmp; | |
208 | ||
209 | if (ld_type->id == 0) { | |
a030889a | 210 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
211 | return status; |
212 | } | |
b1f69b75 | 213 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 214 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
215 | "alloc_lseg and free_lseg.\n", __func__); |
216 | return status; | |
217 | } | |
02c35fca FI |
218 | |
219 | spin_lock(&pnfs_spinlock); | |
220 | tmp = find_pnfs_driver_locked(ld_type->id); | |
221 | if (!tmp) { | |
222 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
223 | status = 0; | |
224 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
225 | ld_type->name); | |
226 | } else { | |
a030889a | 227 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
228 | __func__, ld_type->id); |
229 | } | |
230 | spin_unlock(&pnfs_spinlock); | |
231 | ||
232 | return status; | |
233 | } | |
234 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
235 | ||
236 | void | |
237 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
238 | { | |
239 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
240 | spin_lock(&pnfs_spinlock); | |
241 | list_del(&ld_type->pnfs_tblid); | |
242 | spin_unlock(&pnfs_spinlock); | |
243 | } | |
244 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 245 | |
b1f69b75 AA |
246 | /* |
247 | * pNFS client layout cache | |
248 | */ | |
249 | ||
cc6e5340 | 250 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 251 | void |
70c3bd2b | 252 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 253 | { |
cc6e5340 | 254 | atomic_inc(&lo->plh_refcount); |
e5e94017 BH |
255 | } |
256 | ||
636fb9c8 BH |
257 | static struct pnfs_layout_hdr * |
258 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
259 | { | |
260 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 261 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
262 | } |
263 | ||
264 | static void | |
265 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
266 | { | |
9c626381 TM |
267 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
268 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
269 | ||
270 | if (!list_empty(&lo->plh_layouts)) { | |
271 | struct nfs_client *clp = server->nfs_client; | |
272 | ||
273 | spin_lock(&clp->cl_lock); | |
274 | list_del_init(&lo->plh_layouts); | |
275 | spin_unlock(&clp->cl_lock); | |
276 | } | |
9fa40758 | 277 | put_rpccred(lo->plh_lc_cred); |
57934278 | 278 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
279 | } |
280 | ||
e5e94017 | 281 | static void |
6622c3ea | 282 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 283 | { |
bb346f63 | 284 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 285 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
286 | nfsi->layout = NULL; |
287 | /* Reset MDS Threshold I/O counters */ | |
288 | nfsi->write_io = 0; | |
289 | nfsi->read_io = 0; | |
e5e94017 BH |
290 | } |
291 | ||
b1f69b75 | 292 | void |
70c3bd2b | 293 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 294 | { |
cc6e5340 FI |
295 | struct inode *inode = lo->plh_inode; |
296 | ||
13c13a6a TM |
297 | pnfs_layoutreturn_before_put_layout_hdr(lo); |
298 | ||
cc6e5340 | 299 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
566f8737 PT |
300 | if (!list_empty(&lo->plh_segs)) |
301 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 302 | pnfs_detach_layout_hdr(lo); |
cc6e5340 | 303 | spin_unlock(&inode->i_lock); |
6622c3ea | 304 | pnfs_free_layout_hdr(lo); |
cc6e5340 | 305 | } |
974cec8c AA |
306 | } |
307 | ||
4aab9732 TM |
308 | static void |
309 | pnfs_set_plh_return_info(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode, | |
310 | u32 seq) | |
311 | { | |
312 | if (lo->plh_return_iomode != 0 && lo->plh_return_iomode != iomode) | |
313 | iomode = IOMODE_ANY; | |
314 | lo->plh_return_iomode = iomode; | |
315 | set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); | |
316 | if (seq != 0) { | |
317 | WARN_ON_ONCE(lo->plh_return_seq != 0 && lo->plh_return_seq != seq); | |
318 | lo->plh_return_seq = seq; | |
319 | } | |
320 | } | |
321 | ||
ae5a459d TM |
322 | static void |
323 | pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo) | |
324 | { | |
325 | lo->plh_return_iomode = 0; | |
326 | lo->plh_return_seq = 0; | |
327 | clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); | |
328 | } | |
329 | ||
362fb578 TM |
330 | static void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
331 | { | |
332 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
333 | clear_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags); | |
334 | smp_mb__after_atomic(); | |
335 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
336 | rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); | |
337 | } | |
338 | ||
fe1cf946 TM |
339 | static void |
340 | pnfs_clear_lseg_state(struct pnfs_layout_segment *lseg, | |
341 | struct list_head *free_me) | |
342 | { | |
343 | clear_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
344 | clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
345 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) | |
346 | pnfs_lseg_dec_and_remove_zero(lseg, free_me); | |
347 | if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
348 | pnfs_lseg_dec_and_remove_zero(lseg, free_me); | |
349 | } | |
350 | ||
2454dfea TM |
351 | /* |
352 | * Mark a pnfs_layout_hdr and all associated layout segments as invalid | |
353 | * | |
354 | * In order to continue using the pnfs_layout_hdr, a full recovery | |
355 | * is required. | |
356 | * Note that caller must hold inode->i_lock. | |
357 | */ | |
5f46be04 | 358 | int |
2454dfea TM |
359 | pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, |
360 | struct list_head *lseg_list) | |
361 | { | |
362 | struct pnfs_layout_range range = { | |
363 | .iomode = IOMODE_ANY, | |
364 | .offset = 0, | |
365 | .length = NFS4_MAX_UINT64, | |
366 | }; | |
fe1cf946 | 367 | struct pnfs_layout_segment *lseg, *next; |
2454dfea TM |
368 | |
369 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
ae5a459d | 370 | pnfs_clear_layoutreturn_info(lo); |
fe1cf946 TM |
371 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
372 | pnfs_clear_lseg_state(lseg, lseg_list); | |
68f74479 | 373 | pnfs_free_returned_lsegs(lo, lseg_list, &range, 0); |
362fb578 TM |
374 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) && |
375 | !test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) | |
376 | pnfs_clear_layoutreturn_waitbit(lo); | |
fe1cf946 | 377 | return !list_empty(&lo->plh_segs); |
2454dfea TM |
378 | } |
379 | ||
b9e028fd TM |
380 | static int |
381 | pnfs_iomode_to_fail_bit(u32 iomode) | |
382 | { | |
383 | return iomode == IOMODE_RW ? | |
384 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
385 | } | |
386 | ||
387 | static void | |
3e621214 | 388 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 389 | { |
25c75333 | 390 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 391 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
3e621214 TM |
392 | atomic_inc(&lo->plh_refcount); |
393 | } | |
394 | ||
395 | static void | |
396 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
397 | { | |
398 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
399 | atomic_dec(&lo->plh_refcount); | |
400 | } | |
401 | ||
402 | static void | |
403 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
404 | { | |
405 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
406 | struct pnfs_layout_range range = { |
407 | .iomode = iomode, | |
408 | .offset = 0, | |
409 | .length = NFS4_MAX_UINT64, | |
410 | }; | |
411 | LIST_HEAD(head); | |
3e621214 TM |
412 | |
413 | spin_lock(&inode->i_lock); | |
414 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
6d597e17 | 415 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range, 0); |
3e621214 | 416 | spin_unlock(&inode->i_lock); |
115ce575 | 417 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
418 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
419 | iomode == IOMODE_RW ? "RW" : "READ"); | |
420 | } | |
421 | ||
422 | static bool | |
423 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
424 | { | |
25c75333 | 425 | unsigned long start, end; |
3e621214 TM |
426 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
427 | ||
428 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
429 | return false; |
430 | end = jiffies; | |
431 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
432 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
433 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 434 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
435 | return false; |
436 | } | |
437 | return true; | |
b9e028fd TM |
438 | } |
439 | ||
974cec8c | 440 | static void |
119cef97 TM |
441 | pnfs_init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg, |
442 | const struct pnfs_layout_range *range, | |
443 | const nfs4_stateid *stateid) | |
974cec8c | 444 | { |
566052c5 | 445 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 446 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
4541d16c | 447 | atomic_set(&lseg->pls_refcount, 1); |
4541d16c | 448 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); |
566052c5 | 449 | lseg->pls_layout = lo; |
119cef97 TM |
450 | lseg->pls_range = *range; |
451 | lseg->pls_seq = be32_to_cpu(stateid->seqid); | |
974cec8c AA |
452 | } |
453 | ||
905ca191 | 454 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 455 | { |
68f74479 TM |
456 | if (lseg != NULL) { |
457 | struct inode *inode = lseg->pls_layout->plh_inode; | |
458 | NFS_SERVER(inode)->pnfs_curr_ld->free_lseg(lseg); | |
459 | } | |
974cec8c AA |
460 | } |
461 | ||
d684d2ae | 462 | static void |
57036a37 TM |
463 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
464 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 465 | { |
d20581aa | 466 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 467 | list_del_init(&lseg->pls_list); |
8f0d27dc TM |
468 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
469 | atomic_dec(&lo->plh_refcount); | |
abb3e1c8 TM |
470 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) |
471 | return; | |
7b650994 TM |
472 | if (list_empty(&lo->plh_segs) && |
473 | !test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) && | |
474 | !test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { | |
334a8f37 TM |
475 | if (atomic_read(&lo->plh_outstanding) == 0) |
476 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
173f77e9 | 477 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
2d148c7e | 478 | } |
d684d2ae FI |
479 | } |
480 | ||
68f74479 TM |
481 | static bool |
482 | pnfs_cache_lseg_for_layoutreturn(struct pnfs_layout_hdr *lo, | |
483 | struct pnfs_layout_segment *lseg) | |
484 | { | |
485 | if (test_and_clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && | |
486 | pnfs_layout_is_valid(lo)) { | |
4aab9732 | 487 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); |
68f74479 TM |
488 | list_move_tail(&lseg->pls_list, &lo->plh_return_segs); |
489 | return true; | |
490 | } | |
491 | return false; | |
492 | } | |
493 | ||
bae724ef | 494 | void |
9369a431 | 495 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 496 | { |
57036a37 | 497 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
498 | struct inode *inode; |
499 | ||
500 | if (!lseg) | |
501 | return; | |
502 | ||
4541d16c FI |
503 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
504 | atomic_read(&lseg->pls_refcount), | |
505 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
4ef2e4f8 | 506 | |
57036a37 TM |
507 | lo = lseg->pls_layout; |
508 | inode = lo->plh_inode; | |
4ef2e4f8 | 509 | |
d684d2ae | 510 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
faa4a54f TM |
511 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
512 | spin_unlock(&inode->i_lock); | |
513 | return; | |
514 | } | |
8f0d27dc | 515 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 | 516 | pnfs_layout_remove_lseg(lo, lseg); |
68f74479 TM |
517 | if (pnfs_cache_lseg_for_layoutreturn(lo, lseg)) |
518 | lseg = NULL; | |
4ef2e4f8 TM |
519 | spin_unlock(&inode->i_lock); |
520 | pnfs_free_lseg(lseg); | |
521 | pnfs_put_layout_hdr(lo); | |
4541d16c | 522 | } |
4541d16c | 523 | } |
9369a431 | 524 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 525 | |
6543f803 | 526 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
e6cf82d1 WAA |
527 | { |
528 | struct pnfs_layout_segment *lseg; | |
6543f803 | 529 | struct pnfs_layout_hdr *lo; |
e6cf82d1 WAA |
530 | |
531 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); | |
6543f803 | 532 | lo = lseg->pls_layout; |
e6cf82d1 | 533 | |
6543f803 TM |
534 | pnfs_free_lseg(lseg); |
535 | pnfs_put_layout_hdr(lo); | |
e6cf82d1 WAA |
536 | } |
537 | ||
6543f803 | 538 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
e6cf82d1 | 539 | { |
6543f803 | 540 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
e6cf82d1 WAA |
541 | schedule_work(&lseg->pls_work); |
542 | } | |
6543f803 TM |
543 | |
544 | void | |
545 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) | |
546 | { | |
547 | if (!lseg) | |
548 | return; | |
549 | ||
550 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); | |
551 | ||
552 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, | |
553 | atomic_read(&lseg->pls_refcount), | |
554 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); | |
555 | if (atomic_dec_and_test(&lseg->pls_refcount)) { | |
556 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
faa4a54f TM |
557 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) |
558 | return; | |
6543f803 | 559 | pnfs_layout_remove_lseg(lo, lseg); |
68f74479 TM |
560 | if (!pnfs_cache_lseg_for_layoutreturn(lo, lseg)) { |
561 | pnfs_get_layout_hdr(lo); | |
562 | pnfs_free_lseg_async(lseg); | |
563 | } | |
6543f803 TM |
564 | } |
565 | } | |
566 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); | |
e6cf82d1 | 567 | |
fb3296eb BH |
568 | /* |
569 | * is l2 fully contained in l1? | |
570 | * start1 end1 | |
571 | * [----------------------------------) | |
572 | * start2 end2 | |
573 | * [----------------) | |
574 | */ | |
3cb2df17 | 575 | static bool |
7dc0ac70 | 576 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 577 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
578 | { |
579 | u64 start1 = l1->offset; | |
17822b20 | 580 | u64 end1 = pnfs_end_offset(start1, l1->length); |
fb3296eb | 581 | u64 start2 = l2->offset; |
17822b20 | 582 | u64 end2 = pnfs_end_offset(start2, l2->length); |
fb3296eb BH |
583 | |
584 | return (start1 <= start2) && (end1 >= end2); | |
585 | } | |
586 | ||
24956804 TM |
587 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
588 | struct list_head *tmp_list) | |
589 | { | |
590 | if (!atomic_dec_and_test(&lseg->pls_refcount)) | |
591 | return false; | |
592 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
593 | list_add(&lseg->pls_list, tmp_list); | |
594 | return true; | |
595 | } | |
596 | ||
4541d16c FI |
597 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
598 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
599 | struct list_head *tmp_list) | |
600 | { | |
601 | int rv = 0; | |
602 | ||
603 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
604 | /* Remove the reference keeping the lseg in the | |
605 | * list. It will now be removed when all | |
606 | * outstanding io is finished. | |
607 | */ | |
d684d2ae FI |
608 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
609 | atomic_read(&lseg->pls_refcount)); | |
24956804 | 610 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 611 | rv = 1; |
4541d16c FI |
612 | } |
613 | return rv; | |
614 | } | |
615 | ||
6d597e17 JL |
616 | /* |
617 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
618 | * taking into account wraparound issues. | |
619 | */ | |
620 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
621 | { | |
622 | return (s32)(s1 - s2) > 0; | |
623 | } | |
624 | ||
e036f464 TM |
625 | static bool |
626 | pnfs_should_free_range(const struct pnfs_layout_range *lseg_range, | |
627 | const struct pnfs_layout_range *recall_range) | |
628 | { | |
629 | return (recall_range->iomode == IOMODE_ANY || | |
630 | lseg_range->iomode == recall_range->iomode) && | |
631 | pnfs_lseg_range_intersecting(lseg_range, recall_range); | |
632 | } | |
633 | ||
634 | static bool | |
635 | pnfs_match_lseg_recall(const struct pnfs_layout_segment *lseg, | |
636 | const struct pnfs_layout_range *recall_range, | |
637 | u32 seq) | |
638 | { | |
639 | if (seq != 0 && pnfs_seqid_is_newer(lseg->pls_seq, seq)) | |
640 | return false; | |
641 | if (recall_range == NULL) | |
642 | return true; | |
643 | return pnfs_should_free_range(&lseg->pls_range, recall_range); | |
644 | } | |
645 | ||
6d597e17 JL |
646 | /** |
647 | * pnfs_mark_matching_lsegs_invalid - tear down lsegs or mark them for later | |
648 | * @lo: layout header containing the lsegs | |
649 | * @tmp_list: list head where doomed lsegs should go | |
650 | * @recall_range: optional recall range argument to match (may be NULL) | |
651 | * @seq: only invalidate lsegs obtained prior to this sequence (may be 0) | |
652 | * | |
653 | * Walk the list of lsegs in the layout header, and tear down any that should | |
654 | * be destroyed. If "recall_range" is specified then the segment must match | |
655 | * that range. If "seq" is non-zero, then only match segments that were handed | |
656 | * out at or before that sequence. | |
657 | * | |
658 | * Returns number of matching invalid lsegs remaining in list after scanning | |
659 | * it and purging them. | |
4541d16c | 660 | */ |
43f1b3da | 661 | int |
49a85061 | 662 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 663 | struct list_head *tmp_list, |
6d597e17 JL |
664 | const struct pnfs_layout_range *recall_range, |
665 | u32 seq) | |
974cec8c AA |
666 | { |
667 | struct pnfs_layout_segment *lseg, *next; | |
71b39854 | 668 | int remaining = 0; |
974cec8c AA |
669 | |
670 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
671 | ||
8006bfba | 672 | if (list_empty(&lo->plh_segs)) |
38511722 | 673 | return 0; |
4541d16c | 674 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
e036f464 | 675 | if (pnfs_match_lseg_recall(lseg, recall_range, seq)) { |
6d597e17 | 676 | dprintk("%s: freeing lseg %p iomode %d seq %u" |
4541d16c | 677 | "offset %llu length %llu\n", __func__, |
6d597e17 JL |
678 | lseg, lseg->pls_range.iomode, lseg->pls_seq, |
679 | lseg->pls_range.offset, lseg->pls_range.length); | |
71b39854 TM |
680 | if (!mark_lseg_invalid(lseg, tmp_list)) |
681 | remaining++; | |
4541d16c | 682 | } |
71b39854 TM |
683 | dprintk("%s:Return %i\n", __func__, remaining); |
684 | return remaining; | |
974cec8c AA |
685 | } |
686 | ||
68f74479 TM |
687 | static void |
688 | pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo, | |
689 | struct list_head *free_me, | |
690 | const struct pnfs_layout_range *range, | |
691 | u32 seq) | |
692 | { | |
693 | struct pnfs_layout_segment *lseg, *next; | |
694 | ||
695 | list_for_each_entry_safe(lseg, next, &lo->plh_return_segs, pls_list) { | |
696 | if (pnfs_match_lseg_recall(lseg, range, seq)) | |
697 | list_move_tail(&lseg->pls_list, free_me); | |
698 | } | |
699 | } | |
700 | ||
f49f9baa | 701 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 702 | void |
4541d16c | 703 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 704 | { |
4541d16c | 705 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
706 | |
707 | if (list_empty(free_me)) | |
708 | return; | |
709 | ||
4541d16c | 710 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 711 | list_del(&lseg->pls_list); |
905ca191 | 712 | pnfs_free_lseg(lseg); |
974cec8c AA |
713 | } |
714 | } | |
715 | ||
e5e94017 BH |
716 | void |
717 | pnfs_destroy_layout(struct nfs_inode *nfsi) | |
718 | { | |
719 | struct pnfs_layout_hdr *lo; | |
974cec8c | 720 | LIST_HEAD(tmp_list); |
e5e94017 BH |
721 | |
722 | spin_lock(&nfsi->vfs_inode.i_lock); | |
723 | lo = nfsi->layout; | |
724 | if (lo) { | |
3e621214 | 725 | pnfs_get_layout_hdr(lo); |
2454dfea | 726 | pnfs_mark_layout_stateid_invalid(lo, &tmp_list); |
3e621214 TM |
727 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
728 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
729 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
730 | pnfs_free_lseg_list(&tmp_list); | |
731 | pnfs_put_layout_hdr(lo); | |
732 | } else | |
733 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
974cec8c | 734 | } |
041245c8 | 735 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 736 | |
fd9a8d71 TM |
737 | static bool |
738 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
739 | struct list_head *layout_list) | |
974cec8c AA |
740 | { |
741 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 742 | bool ret = false; |
974cec8c | 743 | |
fd9a8d71 TM |
744 | spin_lock(&inode->i_lock); |
745 | lo = NFS_I(inode)->layout; | |
746 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
747 | pnfs_get_layout_hdr(lo); | |
748 | list_add(&lo->plh_bulk_destroy, layout_list); | |
749 | ret = true; | |
750 | } | |
751 | spin_unlock(&inode->i_lock); | |
752 | return ret; | |
753 | } | |
754 | ||
755 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
756 | static int | |
757 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
758 | struct nfs_server *server, | |
759 | struct list_head *layout_list) | |
760 | { | |
761 | struct pnfs_layout_hdr *lo, *next; | |
762 | struct inode *inode; | |
763 | ||
764 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
b85f5620 TM |
765 | if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) |
766 | continue; | |
fd9a8d71 TM |
767 | inode = igrab(lo->plh_inode); |
768 | if (inode == NULL) | |
769 | continue; | |
770 | list_del_init(&lo->plh_layouts); | |
771 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) | |
772 | continue; | |
773 | rcu_read_unlock(); | |
774 | spin_unlock(&clp->cl_lock); | |
775 | iput(inode); | |
776 | spin_lock(&clp->cl_lock); | |
777 | rcu_read_lock(); | |
778 | return -EAGAIN; | |
779 | } | |
780 | return 0; | |
781 | } | |
782 | ||
783 | static int | |
784 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
785 | bool is_bulk_recall) | |
786 | { | |
787 | struct pnfs_layout_hdr *lo; | |
788 | struct inode *inode; | |
fd9a8d71 TM |
789 | LIST_HEAD(lseg_list); |
790 | int ret = 0; | |
791 | ||
792 | while (!list_empty(layout_list)) { | |
793 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
794 | plh_bulk_destroy); | |
795 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
796 | lo->plh_inode->i_ino); | |
797 | inode = lo->plh_inode; | |
7c5d1875 CH |
798 | |
799 | pnfs_layoutcommit_inode(inode, false); | |
800 | ||
fd9a8d71 TM |
801 | spin_lock(&inode->i_lock); |
802 | list_del_init(&lo->plh_bulk_destroy); | |
9fd4b9fc TM |
803 | if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) { |
804 | if (is_bulk_recall) | |
805 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
fd9a8d71 | 806 | ret = -EAGAIN; |
9fd4b9fc | 807 | } |
fd9a8d71 TM |
808 | spin_unlock(&inode->i_lock); |
809 | pnfs_free_lseg_list(&lseg_list); | |
b20135d0 TM |
810 | /* Free all lsegs that are attached to commit buckets */ |
811 | nfs_commit_inode(inode, 0); | |
fd9a8d71 TM |
812 | pnfs_put_layout_hdr(lo); |
813 | iput(inode); | |
814 | } | |
815 | return ret; | |
816 | } | |
817 | ||
818 | int | |
819 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
820 | struct nfs_fsid *fsid, | |
821 | bool is_recall) | |
822 | { | |
823 | struct nfs_server *server; | |
824 | LIST_HEAD(layout_list); | |
c47abcf8 | 825 | |
974cec8c | 826 | spin_lock(&clp->cl_lock); |
6382a441 | 827 | rcu_read_lock(); |
fd9a8d71 | 828 | restart: |
6382a441 | 829 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
830 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
831 | continue; | |
832 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
833 | server, | |
834 | &layout_list) != 0) | |
835 | goto restart; | |
6382a441 WAA |
836 | } |
837 | rcu_read_unlock(); | |
974cec8c AA |
838 | spin_unlock(&clp->cl_lock); |
839 | ||
fd9a8d71 TM |
840 | if (list_empty(&layout_list)) |
841 | return 0; | |
842 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
843 | } | |
844 | ||
845 | int | |
846 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
847 | bool is_recall) | |
848 | { | |
849 | struct nfs_server *server; | |
850 | LIST_HEAD(layout_list); | |
851 | ||
852 | spin_lock(&clp->cl_lock); | |
853 | rcu_read_lock(); | |
854 | restart: | |
855 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
856 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
857 | server, | |
858 | &layout_list) != 0) | |
859 | goto restart; | |
974cec8c | 860 | } |
fd9a8d71 TM |
861 | rcu_read_unlock(); |
862 | spin_unlock(&clp->cl_lock); | |
863 | ||
864 | if (list_empty(&layout_list)) | |
865 | return 0; | |
866 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
867 | } | |
868 | ||
869 | /* | |
870 | * Called by the state manger to remove all layouts established under an | |
871 | * expired lease. | |
872 | */ | |
873 | void | |
874 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
875 | { | |
876 | nfs4_deviceid_mark_client_invalid(clp); | |
877 | nfs4_deviceid_purge_client(clp); | |
878 | ||
879 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
880 | } |
881 | ||
fd6002e9 | 882 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
883 | void |
884 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
885 | bool update_barrier) | |
b1f69b75 | 886 | { |
ecebb80b | 887 | u32 oldseq, newseq, new_barrier = 0; |
b1f69b75 | 888 | |
2d2f24ad TM |
889 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
890 | newseq = be32_to_cpu(new->seqid); | |
2a59a041 TM |
891 | |
892 | if (!pnfs_layout_is_valid(lo)) { | |
893 | nfs4_stateid_copy(&lo->plh_stateid, new); | |
894 | lo->plh_barrier = newseq; | |
895 | pnfs_clear_layoutreturn_info(lo); | |
896 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
897 | return; | |
898 | } | |
899 | if (pnfs_seqid_is_newer(newseq, oldseq)) { | |
f597c537 | 900 | nfs4_stateid_copy(&lo->plh_stateid, new); |
ecebb80b TM |
901 | /* |
902 | * Because of wraparound, we want to keep the barrier | |
903 | * "close" to the current seqids. | |
904 | */ | |
905 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); | |
43f1b3da | 906 | } |
ecebb80b TM |
907 | if (update_barrier) |
908 | new_barrier = be32_to_cpu(new->seqid); | |
909 | else if (new_barrier == 0) | |
910 | return; | |
2a59a041 | 911 | if (pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
ecebb80b | 912 | lo->plh_barrier = new_barrier; |
b1f69b75 AA |
913 | } |
914 | ||
cf7d63f1 | 915 | static bool |
19c54aba TM |
916 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
917 | const nfs4_stateid *stateid) | |
43f1b3da | 918 | { |
19c54aba | 919 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 920 | |
19c54aba TM |
921 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
922 | } | |
923 | ||
924 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
925 | static bool | |
e1c06f80 | 926 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo) |
19c54aba | 927 | { |
f7e8917a | 928 | return lo->plh_block_lgets || |
e1c06f80 | 929 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
cf7d63f1 FI |
930 | } |
931 | ||
b1f69b75 | 932 | /* |
183d9e7b JL |
933 | * Get layout from server. |
934 | * for now, assume that whole file layouts are requested. | |
935 | * arg->offset: 0 | |
936 | * arg->length: all ones | |
937 | */ | |
e5e94017 BH |
938 | static struct pnfs_layout_segment * |
939 | send_layoutget(struct pnfs_layout_hdr *lo, | |
940 | struct nfs_open_context *ctx, | |
183d9e7b | 941 | nfs4_stateid *stateid, |
e144e539 | 942 | const struct pnfs_layout_range *range, |
183d9e7b | 943 | long *timeout, gfp_t gfp_flags) |
e5e94017 | 944 | { |
b7edfaa1 | 945 | struct inode *ino = lo->plh_inode; |
b1f69b75 AA |
946 | struct nfs_server *server = NFS_SERVER(ino); |
947 | struct nfs4_layoutget *lgp; | |
2d89a1d3 | 948 | loff_t i_size; |
b1f69b75 AA |
949 | |
950 | dprintk("--> %s\n", __func__); | |
e5e94017 | 951 | |
4f2e9dce JL |
952 | /* |
953 | * Synchronously retrieve layout information from server and | |
954 | * store in lseg. If we race with a concurrent seqid morphing | |
955 | * op, then re-send the LAYOUTGET. | |
956 | */ | |
83026d80 JL |
957 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
958 | if (lgp == NULL) | |
959 | return ERR_PTR(-ENOMEM); | |
960 | ||
961 | i_size = i_size_read(ino); | |
962 | ||
963 | lgp->args.minlength = PAGE_SIZE; | |
964 | if (lgp->args.minlength > range->length) | |
965 | lgp->args.minlength = range->length; | |
966 | if (range->iomode == IOMODE_READ) { | |
967 | if (range->offset >= i_size) | |
968 | lgp->args.minlength = 0; | |
969 | else if (i_size - range->offset < lgp->args.minlength) | |
970 | lgp->args.minlength = i_size - range->offset; | |
d03ab29d | 971 | } |
83026d80 JL |
972 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
973 | pnfs_copy_range(&lgp->args.range, range); | |
974 | lgp->args.type = server->pnfs_curr_ld->id; | |
975 | lgp->args.inode = ino; | |
976 | lgp->args.ctx = get_nfs_open_context(ctx); | |
183d9e7b | 977 | nfs4_stateid_copy(&lgp->args.stateid, stateid); |
83026d80 JL |
978 | lgp->gfp_flags = gfp_flags; |
979 | lgp->cred = lo->plh_lc_cred; | |
35124a09 | 980 | |
183d9e7b | 981 | return nfs4_proc_layoutget(lgp, timeout, gfp_flags); |
974cec8c AA |
982 | } |
983 | ||
24956804 TM |
984 | static void pnfs_clear_layoutcommit(struct inode *inode, |
985 | struct list_head *head) | |
986 | { | |
987 | struct nfs_inode *nfsi = NFS_I(inode); | |
988 | struct pnfs_layout_segment *lseg, *tmp; | |
989 | ||
990 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
991 | return; | |
992 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
993 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
994 | continue; | |
995 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
996 | } | |
997 | } | |
998 | ||
68f74479 | 999 | void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, |
2a974425 | 1000 | const nfs4_stateid *arg_stateid, |
68f74479 | 1001 | const struct pnfs_layout_range *range, |
68f74479 TM |
1002 | const nfs4_stateid *stateid) |
1003 | { | |
1004 | struct inode *inode = lo->plh_inode; | |
1005 | LIST_HEAD(freeme); | |
1006 | ||
1007 | spin_lock(&inode->i_lock); | |
2a974425 TM |
1008 | if (!pnfs_layout_is_valid(lo) || !arg_stateid || |
1009 | !nfs4_stateid_match_other(&lo->plh_stateid, arg_stateid)) | |
1010 | goto out_unlock; | |
68f74479 | 1011 | if (stateid) { |
2a974425 TM |
1012 | u32 seq = be32_to_cpu(arg_stateid->seqid); |
1013 | ||
68f74479 TM |
1014 | pnfs_mark_matching_lsegs_invalid(lo, &freeme, range, seq); |
1015 | pnfs_free_returned_lsegs(lo, &freeme, range, seq); | |
1016 | pnfs_set_layout_stateid(lo, stateid, true); | |
1017 | } else | |
1018 | pnfs_mark_layout_stateid_invalid(lo, &freeme); | |
2a974425 | 1019 | out_unlock: |
68f74479 TM |
1020 | pnfs_clear_layoutreturn_waitbit(lo); |
1021 | spin_unlock(&inode->i_lock); | |
1022 | pnfs_free_lseg_list(&freeme); | |
1023 | ||
1024 | } | |
1025 | ||
13c13a6a | 1026 | static bool |
e5fd1904 TM |
1027 | pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo, |
1028 | nfs4_stateid *stateid, | |
1029 | enum pnfs_iomode *iomode) | |
13c13a6a | 1030 | { |
bf0291dd TM |
1031 | /* Serialise LAYOUTGET/LAYOUTRETURN */ |
1032 | if (atomic_read(&lo->plh_outstanding) != 0) | |
1033 | return false; | |
6604b203 | 1034 | if (test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) |
13c13a6a | 1035 | return false; |
6604b203 | 1036 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); |
13c13a6a | 1037 | pnfs_get_layout_hdr(lo); |
e5fd1904 TM |
1038 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) { |
1039 | if (stateid != NULL) { | |
1040 | nfs4_stateid_copy(stateid, &lo->plh_stateid); | |
1041 | if (lo->plh_return_seq != 0) | |
1042 | stateid->seqid = cpu_to_be32(lo->plh_return_seq); | |
1043 | } | |
1044 | if (iomode != NULL) | |
1045 | *iomode = lo->plh_return_iomode; | |
1046 | pnfs_clear_layoutreturn_info(lo); | |
1047 | return true; | |
1048 | } | |
1049 | if (stateid != NULL) | |
1050 | nfs4_stateid_copy(stateid, &lo->plh_stateid); | |
1051 | if (iomode != NULL) | |
1052 | *iomode = IOMODE_ANY; | |
13c13a6a TM |
1053 | return true; |
1054 | } | |
1055 | ||
828ed9ec TM |
1056 | static void |
1057 | pnfs_init_layoutreturn_args(struct nfs4_layoutreturn_args *args, | |
1058 | struct pnfs_layout_hdr *lo, | |
1059 | const nfs4_stateid *stateid, | |
1060 | enum pnfs_iomode iomode) | |
1061 | { | |
1062 | struct inode *inode = lo->plh_inode; | |
1063 | ||
1064 | args->layout_type = NFS_SERVER(inode)->pnfs_curr_ld->id; | |
1065 | args->inode = inode; | |
1066 | args->range.iomode = iomode; | |
1067 | args->range.offset = 0; | |
1068 | args->range.length = NFS4_MAX_UINT64; | |
1069 | args->layout = lo; | |
1070 | nfs4_stateid_copy(&args->stateid, stateid); | |
1071 | } | |
1072 | ||
f40eb5d0 | 1073 | static int |
ed429d6b | 1074 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid, |
6c16605d | 1075 | enum pnfs_iomode iomode, bool sync) |
f40eb5d0 PT |
1076 | { |
1077 | struct inode *ino = lo->plh_inode; | |
287bd3e9 | 1078 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; |
f40eb5d0 PT |
1079 | struct nfs4_layoutreturn *lrp; |
1080 | int status = 0; | |
1081 | ||
e4af440a | 1082 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
1083 | if (unlikely(lrp == NULL)) { |
1084 | status = -ENOMEM; | |
1085 | spin_lock(&ino->i_lock); | |
d67ae825 | 1086 | pnfs_clear_layoutreturn_waitbit(lo); |
f40eb5d0 PT |
1087 | spin_unlock(&ino->i_lock); |
1088 | pnfs_put_layout_hdr(lo); | |
1089 | goto out; | |
1090 | } | |
1091 | ||
828ed9ec | 1092 | pnfs_init_layoutreturn_args(&lrp->args, lo, stateid, iomode); |
4d796d75 | 1093 | lrp->args.ld_private = &lrp->ld_private; |
f40eb5d0 PT |
1094 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
1095 | lrp->cred = lo->plh_lc_cred; | |
287bd3e9 TM |
1096 | if (ld->prepare_layoutreturn) |
1097 | ld->prepare_layoutreturn(&lrp->args); | |
f40eb5d0 | 1098 | |
6c16605d | 1099 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
1100 | out: |
1101 | dprintk("<-- %s status: %d\n", __func__, status); | |
1102 | return status; | |
1103 | } | |
1104 | ||
13c13a6a TM |
1105 | /* Return true if layoutreturn is needed */ |
1106 | static bool | |
1107 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo) | |
1108 | { | |
1109 | struct pnfs_layout_segment *s; | |
1110 | ||
2370abda | 1111 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
1112 | return false; |
1113 | ||
1114 | /* Defer layoutreturn until all lsegs are done */ | |
1115 | list_for_each_entry(s, &lo->plh_segs, pls_list) { | |
1116 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) | |
1117 | return false; | |
1118 | } | |
1119 | ||
1120 | return true; | |
1121 | } | |
1122 | ||
1123 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo) | |
1124 | { | |
1125 | struct inode *inode= lo->plh_inode; | |
1126 | ||
2370abda | 1127 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
1128 | return; |
1129 | spin_lock(&inode->i_lock); | |
1130 | if (pnfs_layout_need_return(lo)) { | |
1131 | nfs4_stateid stateid; | |
1132 | enum pnfs_iomode iomode; | |
1133 | bool send; | |
1134 | ||
e5fd1904 | 1135 | send = pnfs_prepare_layoutreturn(lo, &stateid, &iomode); |
13c13a6a TM |
1136 | spin_unlock(&inode->i_lock); |
1137 | if (send) { | |
1138 | /* Send an async layoutreturn so we dont deadlock */ | |
1139 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
1140 | } | |
1141 | } else | |
1142 | spin_unlock(&inode->i_lock); | |
1143 | } | |
1144 | ||
293b3b06 AA |
1145 | /* |
1146 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
1147 | * when the layout segment list is empty. | |
1148 | * | |
1149 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
1150 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
1151 | * deviceid is marked invalid. | |
1152 | */ | |
cbe82603 BH |
1153 | int |
1154 | _pnfs_return_layout(struct inode *ino) | |
1155 | { | |
1156 | struct pnfs_layout_hdr *lo = NULL; | |
1157 | struct nfs_inode *nfsi = NFS_I(ino); | |
1158 | LIST_HEAD(tmp_list); | |
cbe82603 | 1159 | nfs4_stateid stateid; |
24408f52 | 1160 | int status = 0; |
7f27392c | 1161 | bool send; |
cbe82603 | 1162 | |
366d5052 | 1163 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
1164 | |
1165 | spin_lock(&ino->i_lock); | |
1166 | lo = nfsi->layout; | |
e5929f3c | 1167 | if (!lo) { |
cbe82603 | 1168 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
1169 | dprintk("NFS: %s no layout to return\n", __func__); |
1170 | goto out; | |
cbe82603 | 1171 | } |
cbe82603 | 1172 | /* Reference matched in nfs4_layoutreturn_release */ |
70c3bd2b | 1173 | pnfs_get_layout_hdr(lo); |
24408f52 TM |
1174 | /* Is there an outstanding layoutreturn ? */ |
1175 | if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) { | |
1176 | spin_unlock(&ino->i_lock); | |
1177 | if (wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
1178 | TASK_UNINTERRUPTIBLE)) | |
1179 | goto out_put_layout_hdr; | |
1180 | spin_lock(&ino->i_lock); | |
1181 | } | |
24956804 | 1182 | pnfs_clear_layoutcommit(ino, &tmp_list); |
6d597e17 | 1183 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL, 0); |
c88953d8 CH |
1184 | |
1185 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
1186 | struct pnfs_layout_range range = { | |
1187 | .iomode = IOMODE_ANY, | |
1188 | .offset = 0, | |
1189 | .length = NFS4_MAX_UINT64, | |
1190 | }; | |
1191 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1192 | } | |
1193 | ||
293b3b06 | 1194 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
24408f52 | 1195 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) { |
293b3b06 | 1196 | spin_unlock(&ino->i_lock); |
293b3b06 | 1197 | dprintk("NFS: %s no layout segments to return\n", __func__); |
7f27392c | 1198 | goto out_put_layout_hdr; |
293b3b06 | 1199 | } |
47abadef | 1200 | |
e5fd1904 | 1201 | send = pnfs_prepare_layoutreturn(lo, &stateid, NULL); |
cbe82603 | 1202 | spin_unlock(&ino->i_lock); |
7f27392c | 1203 | if (send) |
ed429d6b | 1204 | status = pnfs_send_layoutreturn(lo, &stateid, IOMODE_ANY, true); |
7f27392c | 1205 | out_put_layout_hdr: |
ee6625a9 | 1206 | pnfs_free_lseg_list(&tmp_list); |
7f27392c | 1207 | pnfs_put_layout_hdr(lo); |
cbe82603 BH |
1208 | out: |
1209 | dprintk("<-- %s status: %d\n", __func__, status); | |
1210 | return status; | |
1211 | } | |
0a57cdac | 1212 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
cbe82603 | 1213 | |
24028672 TM |
1214 | int |
1215 | pnfs_commit_and_return_layout(struct inode *inode) | |
1216 | { | |
1217 | struct pnfs_layout_hdr *lo; | |
1218 | int ret; | |
1219 | ||
1220 | spin_lock(&inode->i_lock); | |
1221 | lo = NFS_I(inode)->layout; | |
1222 | if (lo == NULL) { | |
1223 | spin_unlock(&inode->i_lock); | |
1224 | return 0; | |
1225 | } | |
1226 | pnfs_get_layout_hdr(lo); | |
1227 | /* Block new layoutgets and read/write to ds */ | |
1228 | lo->plh_block_lgets++; | |
1229 | spin_unlock(&inode->i_lock); | |
1230 | filemap_fdatawait(inode->i_mapping); | |
1231 | ret = pnfs_layoutcommit_inode(inode, true); | |
1232 | if (ret == 0) | |
1233 | ret = _pnfs_return_layout(inode); | |
1234 | spin_lock(&inode->i_lock); | |
1235 | lo->plh_block_lgets--; | |
1236 | spin_unlock(&inode->i_lock); | |
1237 | pnfs_put_layout_hdr(lo); | |
1238 | return ret; | |
1239 | } | |
1240 | ||
1c5bd76d TM |
1241 | bool pnfs_roc(struct inode *ino, |
1242 | struct nfs4_layoutreturn_args *args, | |
1243 | struct nfs4_layoutreturn_res *res, | |
1244 | const struct rpc_cred *cred) | |
f7e8917a | 1245 | { |
40dd4b7a TM |
1246 | struct nfs_inode *nfsi = NFS_I(ino); |
1247 | struct nfs_open_context *ctx; | |
1248 | struct nfs4_state *state; | |
f7e8917a | 1249 | struct pnfs_layout_hdr *lo; |
1c5bd76d | 1250 | struct pnfs_layout_segment *lseg, *next; |
193e3aa2 | 1251 | nfs4_stateid stateid; |
1c5bd76d TM |
1252 | enum pnfs_iomode iomode = 0; |
1253 | bool layoutreturn = false, roc = false; | |
e71708d4 | 1254 | bool skip_read = false; |
f7e8917a | 1255 | |
1c5bd76d TM |
1256 | if (!nfs_have_layout(ino)) |
1257 | return false; | |
29ade5db | 1258 | retry: |
f7e8917a | 1259 | spin_lock(&ino->i_lock); |
40dd4b7a | 1260 | lo = nfsi->layout; |
0cdc329e TM |
1261 | if (!lo || !pnfs_layout_is_valid(lo) || |
1262 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) | |
40dd4b7a | 1263 | goto out_noroc; |
29ade5db TM |
1264 | if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) { |
1265 | pnfs_get_layout_hdr(lo); | |
1266 | spin_unlock(&ino->i_lock); | |
1267 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
1268 | TASK_UNINTERRUPTIBLE); | |
1269 | pnfs_put_layout_hdr(lo); | |
1270 | goto retry; | |
1271 | } | |
40dd4b7a | 1272 | |
e755d638 | 1273 | /* no roc if we hold a delegation */ |
e71708d4 TM |
1274 | if (nfs4_check_delegation(ino, FMODE_READ)) { |
1275 | if (nfs4_check_delegation(ino, FMODE_WRITE)) | |
1276 | goto out_noroc; | |
1277 | skip_read = true; | |
1278 | } | |
40dd4b7a TM |
1279 | |
1280 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1281 | state = ctx->state; | |
e71708d4 TM |
1282 | if (state == NULL) |
1283 | continue; | |
40dd4b7a | 1284 | /* Don't return layout if there is open file state */ |
e71708d4 | 1285 | if (state->state & FMODE_WRITE) |
40dd4b7a | 1286 | goto out_noroc; |
e71708d4 TM |
1287 | if (state->state & FMODE_READ) |
1288 | skip_read = true; | |
40dd4b7a TM |
1289 | } |
1290 | ||
e755d638 | 1291 | |
1c5bd76d | 1292 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) { |
e71708d4 TM |
1293 | if (skip_read && lseg->pls_range.iomode == IOMODE_READ) |
1294 | continue; | |
e755d638 | 1295 | /* If we are sending layoutreturn, invalidate all valid lsegs */ |
1c5bd76d TM |
1296 | if (!test_and_clear_bit(NFS_LSEG_ROC, &lseg->pls_flags)) |
1297 | continue; | |
1298 | /* | |
1299 | * Note: mark lseg for return so pnfs_layout_remove_lseg | |
1300 | * doesn't invalidate the layout for us. | |
1301 | */ | |
1302 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
1303 | if (!mark_lseg_invalid(lseg, &lo->plh_return_segs)) | |
1304 | continue; | |
1305 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); | |
69820d22 TM |
1306 | } |
1307 | ||
1c5bd76d TM |
1308 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
1309 | goto out_noroc; | |
69820d22 | 1310 | |
500d701f | 1311 | /* ROC in two conditions: |
e755d638 PT |
1312 | * 1. there are ROC lsegs |
1313 | * 2. we don't send layoutreturn | |
e755d638 | 1314 | */ |
1c5bd76d TM |
1315 | /* lo ref dropped in pnfs_roc_release() */ |
1316 | layoutreturn = pnfs_prepare_layoutreturn(lo, &stateid, &iomode); | |
1317 | /* If the creds don't match, we can't compound the layoutreturn */ | |
1318 | if (!layoutreturn || cred != lo->plh_lc_cred) | |
1319 | goto out_noroc; | |
1320 | ||
1321 | roc = layoutreturn; | |
1322 | pnfs_init_layoutreturn_args(args, lo, &stateid, iomode); | |
1323 | res->lrs_present = 0; | |
1324 | layoutreturn = false; | |
f7e8917a | 1325 | |
40dd4b7a | 1326 | out_noroc: |
f7e8917a | 1327 | spin_unlock(&ino->i_lock); |
e755d638 | 1328 | pnfs_layoutcommit_inode(ino, true); |
287bd3e9 TM |
1329 | if (roc) { |
1330 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
1331 | if (ld->prepare_layoutreturn) | |
1332 | ld->prepare_layoutreturn(args); | |
1333 | return true; | |
1334 | } | |
e755d638 | 1335 | if (layoutreturn) |
1c5bd76d | 1336 | pnfs_send_layoutreturn(lo, &stateid, iomode, true); |
287bd3e9 | 1337 | return false; |
f7e8917a FI |
1338 | } |
1339 | ||
1c5bd76d TM |
1340 | void pnfs_roc_release(struct nfs4_layoutreturn_args *args, |
1341 | struct nfs4_layoutreturn_res *res, | |
1342 | int ret) | |
f7e8917a | 1343 | { |
1c5bd76d TM |
1344 | struct pnfs_layout_hdr *lo = args->layout; |
1345 | const nfs4_stateid *arg_stateid = NULL; | |
1346 | const nfs4_stateid *res_stateid = NULL; | |
287bd3e9 | 1347 | struct nfs4_xdr_opaque_data *ld_private = args->ld_private; |
f7e8917a | 1348 | |
1c5bd76d TM |
1349 | if (ret == 0) { |
1350 | arg_stateid = &args->stateid; | |
1351 | if (res->lrs_present) | |
1352 | res_stateid = &res->stateid; | |
1353 | } | |
1354 | pnfs_layoutreturn_free_lsegs(lo, arg_stateid, &args->range, | |
1355 | res_stateid); | |
287bd3e9 TM |
1356 | if (ld_private && ld_private->ops && ld_private->ops->free) |
1357 | ld_private->ops->free(ld_private); | |
1c5bd76d TM |
1358 | pnfs_put_layout_hdr(lo); |
1359 | trace_nfs4_layoutreturn_on_close(args->inode, 0); | |
f7e8917a FI |
1360 | } |
1361 | ||
500d701f PT |
1362 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
1363 | { | |
1364 | struct nfs_inode *nfsi = NFS_I(ino); | |
1365 | struct pnfs_layout_hdr *lo; | |
1366 | bool sleep = false; | |
1367 | ||
1368 | /* we might not have grabbed lo reference. so need to check under | |
1369 | * i_lock */ | |
1370 | spin_lock(&ino->i_lock); | |
1371 | lo = nfsi->layout; | |
ee284e35 TM |
1372 | if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
1373 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
500d701f | 1374 | sleep = true; |
ee284e35 | 1375 | } |
500d701f | 1376 | spin_unlock(&ino->i_lock); |
500d701f PT |
1377 | return sleep; |
1378 | } | |
1379 | ||
b1f69b75 AA |
1380 | /* |
1381 | * Compare two layout segments for sorting into layout cache. | |
1382 | * We want to preferentially return RW over RO layouts, so ensure those | |
1383 | * are seen first. | |
1384 | */ | |
1385 | static s64 | |
7dc0ac70 | 1386 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1387 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1388 | { |
fb3296eb BH |
1389 | s64 d; |
1390 | ||
1391 | /* high offset > low offset */ | |
1392 | d = l1->offset - l2->offset; | |
1393 | if (d) | |
1394 | return d; | |
1395 | ||
1396 | /* short length > long length */ | |
1397 | d = l2->length - l1->length; | |
1398 | if (d) | |
1399 | return d; | |
1400 | ||
b1f69b75 | 1401 | /* read > read/write */ |
fb3296eb | 1402 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1403 | } |
1404 | ||
03772d2f TM |
1405 | static bool |
1406 | pnfs_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
1407 | const struct pnfs_layout_range *l2) | |
1408 | { | |
1409 | return pnfs_lseg_range_cmp(l1, l2) > 0; | |
1410 | } | |
1411 | ||
1412 | static bool | |
1413 | pnfs_lseg_no_merge(struct pnfs_layout_segment *lseg, | |
1414 | struct pnfs_layout_segment *old) | |
1415 | { | |
1416 | return false; | |
1417 | } | |
1418 | ||
1419 | void | |
1420 | pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1421 | struct pnfs_layout_segment *lseg, | |
1422 | bool (*is_after)(const struct pnfs_layout_range *, | |
1423 | const struct pnfs_layout_range *), | |
1424 | bool (*do_merge)(struct pnfs_layout_segment *, | |
1425 | struct pnfs_layout_segment *), | |
1426 | struct list_head *free_me) | |
974cec8c | 1427 | { |
03772d2f | 1428 | struct pnfs_layout_segment *lp, *tmp; |
b1f69b75 | 1429 | |
974cec8c AA |
1430 | dprintk("%s:Begin\n", __func__); |
1431 | ||
03772d2f TM |
1432 | list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) { |
1433 | if (test_bit(NFS_LSEG_VALID, &lp->pls_flags) == 0) | |
1434 | continue; | |
1435 | if (do_merge(lseg, lp)) { | |
1436 | mark_lseg_invalid(lp, free_me); | |
1437 | continue; | |
1438 | } | |
1439 | if (is_after(&lseg->pls_range, &lp->pls_range)) | |
b1f69b75 | 1440 | continue; |
566052c5 | 1441 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1442 | dprintk("%s: inserted lseg %p " |
1443 | "iomode %d offset %llu length %llu before " | |
1444 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1445 | __func__, lseg, lseg->pls_range.iomode, |
1446 | lseg->pls_range.offset, lseg->pls_range.length, | |
1447 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1448 | lp->pls_range.length); | |
fb3296eb | 1449 | goto out; |
974cec8c | 1450 | } |
fb3296eb BH |
1451 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1452 | dprintk("%s: inserted lseg %p " | |
1453 | "iomode %d offset %llu length %llu at tail\n", | |
1454 | __func__, lseg, lseg->pls_range.iomode, | |
1455 | lseg->pls_range.offset, lseg->pls_range.length); | |
1456 | out: | |
70c3bd2b | 1457 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1458 | |
1459 | dprintk("%s:Return\n", __func__); | |
e5e94017 | 1460 | } |
03772d2f TM |
1461 | EXPORT_SYMBOL_GPL(pnfs_generic_layout_insert_lseg); |
1462 | ||
1463 | static void | |
1464 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1465 | struct pnfs_layout_segment *lseg, | |
1466 | struct list_head *free_me) | |
1467 | { | |
1468 | struct inode *inode = lo->plh_inode; | |
1469 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
1470 | ||
1471 | if (ld->add_lseg != NULL) | |
1472 | ld->add_lseg(lo, lseg, free_me); | |
1473 | else | |
1474 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
1475 | pnfs_lseg_range_is_after, | |
1476 | pnfs_lseg_no_merge, | |
1477 | free_me); | |
1478 | } | |
e5e94017 BH |
1479 | |
1480 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1481 | alloc_init_layout_hdr(struct inode *ino, |
1482 | struct nfs_open_context *ctx, | |
1483 | gfp_t gfp_flags) | |
e5e94017 BH |
1484 | { |
1485 | struct pnfs_layout_hdr *lo; | |
1486 | ||
636fb9c8 | 1487 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1488 | if (!lo) |
1489 | return NULL; | |
cc6e5340 | 1490 | atomic_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1491 | INIT_LIST_HEAD(&lo->plh_layouts); |
1492 | INIT_LIST_HEAD(&lo->plh_segs); | |
68f74479 | 1493 | INIT_LIST_HEAD(&lo->plh_return_segs); |
fd9a8d71 | 1494 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1495 | lo->plh_inode = ino; |
5cc2216d | 1496 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
67a3b721 | 1497 | lo->plh_flags |= 1 << NFS_LAYOUT_INVALID_STID; |
e5e94017 BH |
1498 | return lo; |
1499 | } | |
1500 | ||
1501 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1502 | pnfs_find_alloc_layout(struct inode *ino, |
1503 | struct nfs_open_context *ctx, | |
1504 | gfp_t gfp_flags) | |
e5241e43 TM |
1505 | __releases(&ino->i_lock) |
1506 | __acquires(&ino->i_lock) | |
e5e94017 BH |
1507 | { |
1508 | struct nfs_inode *nfsi = NFS_I(ino); | |
1509 | struct pnfs_layout_hdr *new = NULL; | |
1510 | ||
1511 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1512 | ||
251ec410 TM |
1513 | if (nfsi->layout != NULL) |
1514 | goto out_existing; | |
e5e94017 | 1515 | spin_unlock(&ino->i_lock); |
9fa40758 | 1516 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1517 | spin_lock(&ino->i_lock); |
1518 | ||
251ec410 | 1519 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1520 | nfsi->layout = new; |
251ec410 | 1521 | return new; |
7175fe90 YN |
1522 | } else if (new != NULL) |
1523 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1524 | out_existing: |
1525 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1526 | return nfsi->layout; |
1527 | } | |
1528 | ||
b1f69b75 AA |
1529 | /* |
1530 | * iomode matching rules: | |
c7d73af2 TH |
1531 | * iomode lseg strict match |
1532 | * iomode | |
1533 | * ----- ----- ------ ----- | |
1534 | * ANY READ N/A true | |
1535 | * ANY RW N/A true | |
1536 | * RW READ N/A false | |
1537 | * RW RW N/A true | |
1538 | * READ READ N/A true | |
1539 | * READ RW true false | |
1540 | * READ RW false true | |
b1f69b75 | 1541 | */ |
3cb2df17 | 1542 | static bool |
7dc0ac70 | 1543 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
c7d73af2 TH |
1544 | const struct pnfs_layout_range *range, |
1545 | bool strict_iomode) | |
b1f69b75 | 1546 | { |
fb3296eb BH |
1547 | struct pnfs_layout_range range1; |
1548 | ||
1549 | if ((range->iomode == IOMODE_RW && | |
1550 | ls_range->iomode != IOMODE_RW) || | |
c7d73af2 TH |
1551 | (range->iomode != ls_range->iomode && |
1552 | strict_iomode == true) || | |
7dc0ac70 | 1553 | !pnfs_lseg_range_intersecting(ls_range, range)) |
fb3296eb BH |
1554 | return 0; |
1555 | ||
1556 | /* range1 covers only the first byte in the range */ | |
1557 | range1 = *range; | |
1558 | range1.length = 1; | |
7dc0ac70 | 1559 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1560 | } |
1561 | ||
1562 | /* | |
1563 | * lookup range in layout | |
1564 | */ | |
e5e94017 | 1565 | static struct pnfs_layout_segment * |
fb3296eb | 1566 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
c7d73af2 TH |
1567 | struct pnfs_layout_range *range, |
1568 | bool strict_iomode) | |
e5e94017 | 1569 | { |
b1f69b75 AA |
1570 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1571 | ||
1572 | dprintk("%s:Begin\n", __func__); | |
1573 | ||
b7edfaa1 | 1574 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1575 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
ce6ab4f2 | 1576 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
c7d73af2 TH |
1577 | pnfs_lseg_range_match(&lseg->pls_range, range, |
1578 | strict_iomode)) { | |
9369a431 | 1579 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1580 | break; |
1581 | } | |
b1f69b75 AA |
1582 | } |
1583 | ||
1584 | dprintk("%s:Return lseg %p ref %d\n", | |
4541d16c | 1585 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1586 | return ret; |
e5e94017 BH |
1587 | } |
1588 | ||
d23d61c8 AA |
1589 | /* |
1590 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1591 | * to the MDS or over pNFS | |
1592 | * | |
1593 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1594 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1595 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1596 | * WRITE request. | |
1597 | * | |
1598 | * A return of true means use MDS I/O. | |
1599 | * | |
1600 | * From rfc 5661: | |
1601 | * If a file's size is smaller than the file size threshold, data accesses | |
1602 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1603 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1604 | * server. If both file size and I/O size are provided, the client SHOULD | |
1605 | * reach or exceed both thresholds before sending its read or write | |
1606 | * requests to the data server. | |
1607 | */ | |
1608 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1609 | struct inode *ino, int iomode) | |
1610 | { | |
1611 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1612 | struct nfs_inode *nfsi = NFS_I(ino); | |
1613 | loff_t fsize = i_size_read(ino); | |
1614 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1615 | ||
1616 | if (t == NULL) | |
1617 | return ret; | |
1618 | ||
1619 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1620 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1621 | ||
1622 | switch (iomode) { | |
1623 | case IOMODE_READ: | |
1624 | if (t->bm & THRESHOLD_RD) { | |
1625 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1626 | size_set = true; | |
1627 | if (fsize < t->rd_sz) | |
1628 | size = true; | |
1629 | } | |
1630 | if (t->bm & THRESHOLD_RD_IO) { | |
1631 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1632 | nfsi->read_io); | |
1633 | io_set = true; | |
1634 | if (nfsi->read_io < t->rd_io_sz) | |
1635 | io = true; | |
1636 | } | |
1637 | break; | |
1638 | case IOMODE_RW: | |
1639 | if (t->bm & THRESHOLD_WR) { | |
1640 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1641 | size_set = true; | |
1642 | if (fsize < t->wr_sz) | |
1643 | size = true; | |
1644 | } | |
1645 | if (t->bm & THRESHOLD_WR_IO) { | |
1646 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1647 | nfsi->write_io); | |
1648 | io_set = true; | |
1649 | if (nfsi->write_io < t->wr_io_sz) | |
1650 | io = true; | |
1651 | } | |
1652 | break; | |
1653 | } | |
1654 | if (size_set && io_set) { | |
1655 | if (size && io) | |
1656 | ret = true; | |
1657 | } else if (size || io) | |
1658 | ret = true; | |
1659 | ||
1660 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1661 | return ret; | |
1662 | } | |
1663 | ||
aa8a45ee PT |
1664 | static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) |
1665 | { | |
1666 | /* | |
1667 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1668 | * reference | |
1669 | */ | |
1670 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
1671 | return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
2e5b29f0 | 1672 | nfs_wait_bit_killable, |
aa8a45ee PT |
1673 | TASK_UNINTERRUPTIBLE); |
1674 | } | |
1675 | ||
d67ae825 TH |
1676 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1677 | { | |
1678 | unsigned long *bitlock = &lo->plh_flags; | |
1679 | ||
1680 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1681 | smp_mb__after_atomic(); | |
1682 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1683 | } | |
1684 | ||
e5e94017 BH |
1685 | /* |
1686 | * Layout segment is retreived from the server if not cached. | |
1687 | * The appropriate layout segment is referenced and returned to the caller. | |
1688 | */ | |
7c24d948 | 1689 | struct pnfs_layout_segment * |
e5e94017 BH |
1690 | pnfs_update_layout(struct inode *ino, |
1691 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1692 | loff_t pos, |
1693 | u64 count, | |
a75b9df9 | 1694 | enum pnfs_iomode iomode, |
c7d73af2 | 1695 | bool strict_iomode, |
a75b9df9 | 1696 | gfp_t gfp_flags) |
e5e94017 | 1697 | { |
fb3296eb BH |
1698 | struct pnfs_layout_range arg = { |
1699 | .iomode = iomode, | |
1700 | .offset = pos, | |
1701 | .length = count, | |
1702 | }; | |
183d9e7b | 1703 | unsigned pg_offset, seq; |
6382a441 WAA |
1704 | struct nfs_server *server = NFS_SERVER(ino); |
1705 | struct nfs_client *clp = server->nfs_client; | |
183d9e7b | 1706 | struct pnfs_layout_hdr *lo = NULL; |
e5e94017 | 1707 | struct pnfs_layout_segment *lseg = NULL; |
183d9e7b JL |
1708 | nfs4_stateid stateid; |
1709 | long timeout = 0; | |
66b53f32 | 1710 | unsigned long giveup = jiffies + (clp->cl_lease_time << 1); |
30005121 | 1711 | bool first; |
e5e94017 | 1712 | |
9a4bf31d | 1713 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) { |
183d9e7b | 1714 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1715 | PNFS_UPDATE_LAYOUT_NO_PNFS); |
f86bbcf8 | 1716 | goto out; |
9a4bf31d | 1717 | } |
d23d61c8 | 1718 | |
9a4bf31d | 1719 | if (iomode == IOMODE_READ && i_size_read(ino) == 0) { |
183d9e7b | 1720 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1721 | PNFS_UPDATE_LAYOUT_RD_ZEROLEN); |
4ae93560 | 1722 | goto out; |
9a4bf31d | 1723 | } |
4ae93560 | 1724 | |
9a4bf31d | 1725 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { |
183d9e7b | 1726 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1727 | PNFS_UPDATE_LAYOUT_MDSTHRESH); |
f86bbcf8 | 1728 | goto out; |
9a4bf31d | 1729 | } |
d23d61c8 | 1730 | |
9bf87482 | 1731 | lookup_again: |
b88fa69e | 1732 | nfs4_client_recover_expired_lease(clp); |
9bf87482 | 1733 | first = false; |
e5e94017 | 1734 | spin_lock(&ino->i_lock); |
9fa40758 | 1735 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1736 | if (lo == NULL) { |
1737 | spin_unlock(&ino->i_lock); | |
183d9e7b | 1738 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1739 | PNFS_UPDATE_LAYOUT_NOMEM); |
830ffb56 TM |
1740 | goto out; |
1741 | } | |
e5e94017 | 1742 | |
43f1b3da | 1743 | /* Do we even need to bother with this? */ |
a59c30ac | 1744 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
183d9e7b | 1745 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1746 | PNFS_UPDATE_LAYOUT_BULK_RECALL); |
43f1b3da | 1747 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1748 | goto out_unlock; |
1749 | } | |
1750 | ||
1751 | /* if LAYOUTGET already failed once we don't try again */ | |
2e5b29f0 | 1752 | if (pnfs_layout_io_test_failed(lo, iomode)) { |
183d9e7b | 1753 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1754 | PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); |
e5e94017 | 1755 | goto out_unlock; |
9a4bf31d | 1756 | } |
e5e94017 | 1757 | |
c7d73af2 | 1758 | lseg = pnfs_find_lseg(lo, &arg, strict_iomode); |
183d9e7b JL |
1759 | if (lseg) { |
1760 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
1761 | PNFS_UPDATE_LAYOUT_FOUND_CACHED); | |
1762 | goto out_unlock; | |
1763 | } | |
1764 | ||
1765 | if (!nfs4_valid_open_stateid(ctx->state)) { | |
1766 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
1767 | PNFS_UPDATE_LAYOUT_INVALID_OPEN); | |
1768 | goto out_unlock; | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | * Choose a stateid for the LAYOUTGET. If we don't have a layout | |
1773 | * stateid, or it has been invalidated, then we must use the open | |
1774 | * stateid. | |
1775 | */ | |
67a3b721 | 1776 | if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { |
183d9e7b JL |
1777 | |
1778 | /* | |
1779 | * The first layoutget for the file. Need to serialize per | |
9bf87482 PT |
1780 | * RFC 5661 Errata 3208. |
1781 | */ | |
1782 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
1783 | &lo->plh_flags)) { | |
1784 | spin_unlock(&ino->i_lock); | |
1785 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, | |
1786 | TASK_UNINTERRUPTIBLE); | |
1787 | pnfs_put_layout_hdr(lo); | |
183d9e7b | 1788 | dprintk("%s retrying\n", __func__); |
9bf87482 PT |
1789 | goto lookup_again; |
1790 | } | |
183d9e7b JL |
1791 | |
1792 | first = true; | |
1793 | do { | |
1794 | seq = read_seqbegin(&ctx->state->seqlock); | |
1795 | nfs4_stateid_copy(&stateid, &ctx->state->stateid); | |
1796 | } while (read_seqretry(&ctx->state->seqlock, seq)); | |
9bf87482 | 1797 | } else { |
183d9e7b | 1798 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
9bf87482 | 1799 | } |
568e8c49 | 1800 | |
aa8a45ee PT |
1801 | /* |
1802 | * Because we free lsegs before sending LAYOUTRETURN, we need to wait | |
1803 | * for LAYOUTRETURN even if first is true. | |
1804 | */ | |
8f70f53a | 1805 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
aa8a45ee PT |
1806 | spin_unlock(&ino->i_lock); |
1807 | dprintk("%s wait for layoutreturn\n", __func__); | |
1808 | if (pnfs_prepare_to_retry_layoutget(lo)) { | |
d67ae825 TH |
1809 | if (first) |
1810 | pnfs_clear_first_layoutget(lo); | |
aa8a45ee PT |
1811 | pnfs_put_layout_hdr(lo); |
1812 | dprintk("%s retrying\n", __func__); | |
183d9e7b JL |
1813 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, |
1814 | lseg, PNFS_UPDATE_LAYOUT_RETRY); | |
aa8a45ee PT |
1815 | goto lookup_again; |
1816 | } | |
183d9e7b | 1817 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1818 | PNFS_UPDATE_LAYOUT_RETURN); |
aa8a45ee PT |
1819 | goto out_put_layout_hdr; |
1820 | } | |
1821 | ||
9a4bf31d | 1822 | if (pnfs_layoutgets_blocked(lo)) { |
183d9e7b | 1823 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1824 | PNFS_UPDATE_LAYOUT_BLOCKED); |
cf7d63f1 | 1825 | goto out_unlock; |
9a4bf31d | 1826 | } |
cf7d63f1 | 1827 | atomic_inc(&lo->plh_outstanding); |
f49f9baa | 1828 | spin_unlock(&ino->i_lock); |
30005121 | 1829 | |
abb9a007 | 1830 | if (list_empty(&lo->plh_layouts)) { |
2130ff66 FI |
1831 | /* The lo must be on the clp list if there is any |
1832 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1833 | */ | |
1834 | spin_lock(&clp->cl_lock); | |
abb9a007 PT |
1835 | if (list_empty(&lo->plh_layouts)) |
1836 | list_add_tail(&lo->plh_layouts, &server->layouts); | |
2130ff66 FI |
1837 | spin_unlock(&clp->cl_lock); |
1838 | } | |
e5e94017 | 1839 | |
09cbfeaf | 1840 | pg_offset = arg.offset & ~PAGE_MASK; |
707ed5fd BH |
1841 | if (pg_offset) { |
1842 | arg.offset -= pg_offset; | |
1843 | arg.length += pg_offset; | |
1844 | } | |
7c24d948 | 1845 | if (arg.length != NFS4_MAX_UINT64) |
09cbfeaf | 1846 | arg.length = PAGE_ALIGN(arg.length); |
707ed5fd | 1847 | |
183d9e7b JL |
1848 | lseg = send_layoutget(lo, ctx, &stateid, &arg, &timeout, gfp_flags); |
1849 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
1850 | PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); | |
56b38a1f | 1851 | atomic_dec(&lo->plh_outstanding); |
83026d80 | 1852 | if (IS_ERR(lseg)) { |
183d9e7b | 1853 | switch(PTR_ERR(lseg)) { |
e85d7ee4 | 1854 | case -EBUSY: |
183d9e7b JL |
1855 | if (time_after(jiffies, giveup)) |
1856 | lseg = NULL; | |
66b53f32 TM |
1857 | break; |
1858 | case -ERECALLCONFLICT: | |
1859 | /* Huh? We hold no layouts, how is there a recall? */ | |
1860 | if (first) { | |
1861 | lseg = NULL; | |
1862 | break; | |
1863 | } | |
1864 | /* Destroy the existing layout and start over */ | |
1865 | if (time_after(jiffies, giveup)) | |
1866 | pnfs_destroy_layout(NFS_I(ino)); | |
183d9e7b JL |
1867 | /* Fallthrough */ |
1868 | case -EAGAIN: | |
56b38a1f | 1869 | break; |
183d9e7b JL |
1870 | default: |
1871 | if (!nfs_error_is_fatal(PTR_ERR(lseg))) { | |
1872 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
1873 | lseg = NULL; | |
1874 | } | |
56b38a1f TM |
1875 | goto out_put_layout_hdr; |
1876 | } | |
1877 | if (lseg) { | |
1878 | if (first) | |
1879 | pnfs_clear_first_layoutget(lo); | |
1880 | trace_pnfs_update_layout(ino, pos, count, | |
1881 | iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY); | |
1882 | pnfs_put_layout_hdr(lo); | |
1883 | goto lookup_again; | |
83026d80 JL |
1884 | } |
1885 | } else { | |
1886 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
1887 | } | |
1888 | ||
830ffb56 | 1889 | out_put_layout_hdr: |
d67ae825 TH |
1890 | if (first) |
1891 | pnfs_clear_first_layoutget(lo); | |
70c3bd2b | 1892 | pnfs_put_layout_hdr(lo); |
e5e94017 | 1893 | out: |
f86bbcf8 TM |
1894 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
1895 | "(%s, offset: %llu, length: %llu)\n", | |
1896 | __func__, ino->i_sb->s_id, | |
1897 | (unsigned long long)NFS_FILEID(ino), | |
d600ad1f | 1898 | IS_ERR_OR_NULL(lseg) ? "not found" : "found", |
f86bbcf8 TM |
1899 | iomode==IOMODE_RW ? "read/write" : "read-only", |
1900 | (unsigned long long)pos, | |
1901 | (unsigned long long)count); | |
e5e94017 BH |
1902 | return lseg; |
1903 | out_unlock: | |
1904 | spin_unlock(&ino->i_lock); | |
830ffb56 | 1905 | goto out_put_layout_hdr; |
e5e94017 | 1906 | } |
7c24d948 | 1907 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 1908 | |
540d9864 TM |
1909 | static bool |
1910 | pnfs_sanity_check_layout_range(struct pnfs_layout_range *range) | |
1911 | { | |
1912 | switch (range->iomode) { | |
1913 | case IOMODE_READ: | |
1914 | case IOMODE_RW: | |
1915 | break; | |
1916 | default: | |
1917 | return false; | |
1918 | } | |
1919 | if (range->offset == NFS4_MAX_UINT64) | |
1920 | return false; | |
1921 | if (range->length == 0) | |
1922 | return false; | |
1923 | if (range->length != NFS4_MAX_UINT64 && | |
1924 | range->length > NFS4_MAX_UINT64 - range->offset) | |
1925 | return false; | |
1926 | return true; | |
1927 | } | |
1928 | ||
a0b0a6e3 | 1929 | struct pnfs_layout_segment * |
b1f69b75 AA |
1930 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
1931 | { | |
1932 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
1933 | struct nfs4_layoutget_res *res = &lgp->res; | |
1934 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 1935 | struct inode *ino = lo->plh_inode; |
78096cca | 1936 | LIST_HEAD(free_me); |
540d9864 TM |
1937 | |
1938 | if (!pnfs_sanity_check_layout_range(&res->range)) | |
1b3c6d07 | 1939 | return ERR_PTR(-EINVAL); |
b1f69b75 AA |
1940 | |
1941 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 1942 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
1b3c6d07 | 1943 | if (IS_ERR_OR_NULL(lseg)) { |
b1f69b75 | 1944 | if (!lseg) |
1b3c6d07 JL |
1945 | lseg = ERR_PTR(-ENOMEM); |
1946 | ||
1947 | dprintk("%s: Could not allocate layout: error %ld\n", | |
1948 | __func__, PTR_ERR(lseg)); | |
1949 | return lseg; | |
b1f69b75 AA |
1950 | } |
1951 | ||
119cef97 | 1952 | pnfs_init_lseg(lo, lseg, &res->range, &res->stateid); |
1013df61 | 1953 | |
b1f69b75 | 1954 | spin_lock(&ino->i_lock); |
e1c06f80 | 1955 | if (pnfs_layoutgets_blocked(lo)) { |
43f1b3da | 1956 | dprintk("%s forget reply due to state\n", __func__); |
1b3c6d07 | 1957 | goto out_forget; |
43f1b3da | 1958 | } |
038d6493 | 1959 | |
9888d837 TM |
1960 | if (!pnfs_layout_is_valid(lo)) { |
1961 | /* We have a completely new layout */ | |
1962 | pnfs_set_layout_stateid(lo, &res->stateid, true); | |
1963 | } else if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { | |
362f7474 CH |
1964 | /* existing state ID, make sure the sequence number matches. */ |
1965 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
1966 | dprintk("%s forget reply due to sequence\n", __func__); | |
1b3c6d07 | 1967 | goto out_forget; |
362f7474 CH |
1968 | } |
1969 | pnfs_set_layout_stateid(lo, &res->stateid, false); | |
1970 | } else { | |
1971 | /* | |
1972 | * We got an entirely new state ID. Mark all segments for the | |
9888d837 | 1973 | * inode invalid, and retry the layoutget |
362f7474 | 1974 | */ |
d9b61708 | 1975 | pnfs_mark_layout_stateid_invalid(lo, &free_me); |
9888d837 | 1976 | goto out_forget; |
362f7474 | 1977 | } |
038d6493 | 1978 | |
9369a431 | 1979 | pnfs_get_lseg(lseg); |
03772d2f | 1980 | pnfs_layout_insert_lseg(lo, lseg, &free_me); |
8e0acf90 | 1981 | |
b1f69b75 | 1982 | |
3976143b | 1983 | if (res->return_on_close) |
f7e8917a | 1984 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
f7e8917a | 1985 | |
b1f69b75 | 1986 | spin_unlock(&ino->i_lock); |
78096cca | 1987 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 1988 | return lseg; |
43f1b3da | 1989 | |
1b3c6d07 | 1990 | out_forget: |
43f1b3da FI |
1991 | spin_unlock(&ino->i_lock); |
1992 | lseg->pls_layout = lo; | |
1993 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1b3c6d07 | 1994 | return ERR_PTR(-EAGAIN); |
b1f69b75 AA |
1995 | } |
1996 | ||
2f215968 TM |
1997 | /** |
1998 | * pnfs_mark_matching_lsegs_return - Free or return matching layout segments | |
1999 | * @lo: pointer to layout header | |
2000 | * @tmp_list: list header to be used with pnfs_free_lseg_list() | |
2001 | * @return_range: describe layout segment ranges to be returned | |
2002 | * | |
2003 | * This function is mainly intended for use by layoutrecall. It attempts | |
2004 | * to free the layout segment immediately, or else to mark it for return | |
2005 | * as soon as its reference count drops to zero. | |
2006 | */ | |
10335556 | 2007 | int |
016256df PT |
2008 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
2009 | struct list_head *tmp_list, | |
6d597e17 JL |
2010 | const struct pnfs_layout_range *return_range, |
2011 | u32 seq) | |
016256df PT |
2012 | { |
2013 | struct pnfs_layout_segment *lseg, *next; | |
10335556 | 2014 | int remaining = 0; |
016256df PT |
2015 | |
2016 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
2017 | ||
2018 | if (list_empty(&lo->plh_segs)) | |
10335556 | 2019 | return 0; |
016256df | 2020 | |
fc7ff367 | 2021 | assert_spin_locked(&lo->plh_inode->i_lock); |
016256df PT |
2022 | |
2023 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
e036f464 | 2024 | if (pnfs_match_lseg_recall(lseg, return_range, seq)) { |
016256df PT |
2025 | dprintk("%s: marking lseg %p iomode %d " |
2026 | "offset %llu length %llu\n", __func__, | |
2027 | lseg, lseg->pls_range.iomode, | |
2028 | lseg->pls_range.offset, | |
2029 | lseg->pls_range.length); | |
2f215968 TM |
2030 | if (mark_lseg_invalid(lseg, tmp_list)) |
2031 | continue; | |
2032 | remaining++; | |
016256df | 2033 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); |
016256df | 2034 | } |
6d597e17 JL |
2035 | |
2036 | if (remaining) | |
2037 | pnfs_set_plh_return_info(lo, return_range->iomode, seq); | |
2038 | ||
10335556 | 2039 | return remaining; |
016256df PT |
2040 | } |
2041 | ||
2042 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
2043 | struct pnfs_layout_segment *lseg) | |
2044 | { | |
2045 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
016256df PT |
2046 | struct pnfs_layout_range range = { |
2047 | .iomode = lseg->pls_range.iomode, | |
2048 | .offset = 0, | |
2049 | .length = NFS4_MAX_UINT64, | |
2050 | }; | |
10335556 | 2051 | bool return_now = false; |
016256df PT |
2052 | |
2053 | spin_lock(&inode->i_lock); | |
2d6cf5ab | 2054 | pnfs_set_plh_return_info(lo, range.iomode, 0); |
6604b203 TM |
2055 | /* Block LAYOUTGET */ |
2056 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
016256df PT |
2057 | /* |
2058 | * mark all matching lsegs so that we are sure to have no live | |
2059 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
2060 | * for how it works. | |
2061 | */ | |
68f74479 | 2062 | if (!pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs, &range, 0)) { |
10335556 | 2063 | nfs4_stateid stateid; |
e5fd1904 | 2064 | enum pnfs_iomode iomode; |
10335556 | 2065 | |
e5fd1904 | 2066 | return_now = pnfs_prepare_layoutreturn(lo, &stateid, &iomode); |
10335556 TM |
2067 | spin_unlock(&inode->i_lock); |
2068 | if (return_now) | |
2069 | pnfs_send_layoutreturn(lo, &stateid, iomode, false); | |
2070 | } else { | |
2071 | spin_unlock(&inode->i_lock); | |
2072 | nfs_commit_inode(inode, 0); | |
2073 | } | |
016256df PT |
2074 | } |
2075 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); | |
2076 | ||
d8007d4d TM |
2077 | void |
2078 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
2079 | { | |
1fd937bd PT |
2080 | u64 rd_size = req->wb_bytes; |
2081 | ||
cb5d04bc PT |
2082 | if (pgio->pg_lseg == NULL) { |
2083 | if (pgio->pg_dreq == NULL) | |
2084 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
2085 | else | |
2086 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
2087 | ||
2088 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
2089 | req->wb_context, | |
2090 | req_offset(req), | |
2091 | rd_size, | |
2092 | IOMODE_READ, | |
c7d73af2 | 2093 | false, |
cb5d04bc | 2094 | GFP_KERNEL); |
d600ad1f PT |
2095 | if (IS_ERR(pgio->pg_lseg)) { |
2096 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
2097 | pgio->pg_lseg = NULL; | |
2098 | return; | |
2099 | } | |
cb5d04bc | 2100 | } |
e885de1a TM |
2101 | /* If no lseg, fall back to read through mds */ |
2102 | if (pgio->pg_lseg == NULL) | |
1f945357 | 2103 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 2104 | |
d8007d4d TM |
2105 | } |
2106 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
2107 | ||
2108 | void | |
6296556f PT |
2109 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
2110 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 2111 | { |
d600ad1f | 2112 | if (pgio->pg_lseg == NULL) { |
cb5d04bc PT |
2113 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
2114 | req->wb_context, | |
2115 | req_offset(req), | |
2116 | wb_size, | |
2117 | IOMODE_RW, | |
c7d73af2 | 2118 | false, |
cb5d04bc | 2119 | GFP_NOFS); |
d600ad1f PT |
2120 | if (IS_ERR(pgio->pg_lseg)) { |
2121 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
2122 | pgio->pg_lseg = NULL; | |
2123 | return; | |
2124 | } | |
2125 | } | |
e885de1a TM |
2126 | /* If no lseg, fall back to write through mds */ |
2127 | if (pgio->pg_lseg == NULL) | |
1f945357 | 2128 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
2129 | } |
2130 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
2131 | ||
180bb5ec WAA |
2132 | void |
2133 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
2134 | { | |
2135 | if (desc->pg_lseg) { | |
2136 | pnfs_put_lseg(desc->pg_lseg); | |
2137 | desc->pg_lseg = NULL; | |
2138 | } | |
2139 | } | |
2140 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
2141 | ||
b4fdac1a WAA |
2142 | /* |
2143 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
2144 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
2145 | */ | |
2146 | size_t | |
a7d42ddb WAA |
2147 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
2148 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 2149 | { |
0f9c429e | 2150 | unsigned int size; |
c5e20cb7 | 2151 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
2152 | |
2153 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
2154 | if (!size) |
2155 | return 0; | |
94ad1c80 | 2156 | |
19982ba8 | 2157 | /* |
c5e20cb7 WAA |
2158 | * 'size' contains the number of bytes left in the current page (up |
2159 | * to the original size asked for in @req->wb_bytes). | |
2160 | * | |
2161 | * Calculate how many bytes are left in the layout segment | |
2162 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
2163 | * |
2164 | * Please also note that 'end_offset' is actually the offset of the | |
2165 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
2166 | * | |
2167 | */ | |
19b54848 | 2168 | if (pgio->pg_lseg) { |
17822b20 | 2169 | seg_end = pnfs_end_offset(pgio->pg_lseg->pls_range.offset, |
c5e20cb7 WAA |
2170 | pgio->pg_lseg->pls_range.length); |
2171 | req_start = req_offset(req); | |
7c13789e | 2172 | WARN_ON_ONCE(req_start >= seg_end); |
c5e20cb7 | 2173 | /* start of request is past the last byte of this segment */ |
7c13789e WAA |
2174 | if (req_start >= seg_end) { |
2175 | /* reference the new lseg */ | |
2176 | if (pgio->pg_ops->pg_cleanup) | |
2177 | pgio->pg_ops->pg_cleanup(pgio); | |
2178 | if (pgio->pg_ops->pg_init) | |
2179 | pgio->pg_ops->pg_init(pgio, req); | |
19b54848 | 2180 | return 0; |
7c13789e | 2181 | } |
c5e20cb7 WAA |
2182 | |
2183 | /* adjust 'size' iff there are fewer bytes left in the | |
2184 | * segment than what nfs_generic_pg_test returned */ | |
2185 | seg_left = seg_end - req_start; | |
2186 | if (seg_left < size) | |
2187 | size = (unsigned int)seg_left; | |
19b54848 | 2188 | } |
0f9c429e | 2189 | |
19b54848 | 2190 | return size; |
94ad1c80 | 2191 | } |
89a58e32 | 2192 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 2193 | |
53113ad3 | 2194 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
2195 | { |
2196 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
2197 | |
2198 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
2199 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
2200 | hdr->completion_ops); | |
c7070113 | 2201 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 2202 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 2203 | } |
e7dd79af | 2204 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 2205 | |
d45f60c6 | 2206 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2207 | { |
cd841605 FI |
2208 | |
2209 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
2210 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2211 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2212 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2213 | } |
6c75dc0d | 2214 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2215 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
2216 | } |
2217 | ||
d20581aa BH |
2218 | /* |
2219 | * Called by non rpc-based layout drivers | |
2220 | */ | |
d45f60c6 | 2221 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 2222 | { |
f8417b48 | 2223 | if (likely(!hdr->pnfs_error)) { |
67af7611 TM |
2224 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
2225 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 2226 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
2227 | } |
2228 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); | |
2229 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2230 | pnfs_ld_handle_write_error(hdr); |
2231 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 2232 | } |
d20581aa | 2233 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 2234 | |
dce81290 TM |
2235 | static void |
2236 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2237 | struct nfs_pgio_header *hdr) |
dce81290 | 2238 | { |
48d635f1 | 2239 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2240 | |
6c75dc0d | 2241 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2242 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 2243 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 2244 | mirror->pg_recoalesce = 1; |
6c75dc0d | 2245 | } |
d45f60c6 | 2246 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2247 | hdr->release(hdr); |
dce81290 TM |
2248 | } |
2249 | ||
2250 | static enum pnfs_try_status | |
d45f60c6 | 2251 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
2252 | const struct rpc_call_ops *call_ops, |
2253 | struct pnfs_layout_segment *lseg, | |
2254 | int how) | |
0382b744 | 2255 | { |
cd841605 | 2256 | struct inode *inode = hdr->inode; |
0382b744 AA |
2257 | enum pnfs_try_status trypnfs; |
2258 | struct nfs_server *nfss = NFS_SERVER(inode); | |
2259 | ||
cd841605 | 2260 | hdr->mds_ops = call_ops; |
0382b744 AA |
2261 | |
2262 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
2263 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
2264 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 2265 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 2266 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
2267 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2268 | return trypnfs; | |
2269 | } | |
2270 | ||
dce81290 | 2271 | static void |
7f714720 WAA |
2272 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
2273 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 2274 | { |
dce81290 TM |
2275 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2276 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2277 | enum pnfs_try_status trypnfs; |
dce81290 | 2278 | |
d45f60c6 | 2279 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
7f714720 | 2280 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
d45f60c6 | 2281 | pnfs_write_through_mds(desc, hdr); |
dce81290 TM |
2282 | } |
2283 | ||
6c75dc0d FI |
2284 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
2285 | { | |
9369a431 | 2286 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2287 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
2288 | } |
2289 | ||
dce81290 TM |
2290 | int |
2291 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
2292 | { | |
6c75dc0d | 2293 | struct nfs_pgio_header *hdr; |
dce81290 TM |
2294 | int ret; |
2295 | ||
1e7f3a48 WAA |
2296 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2297 | if (!hdr) { | |
2bff2288 PT |
2298 | desc->pg_error = -ENOMEM; |
2299 | return desc->pg_error; | |
dce81290 | 2300 | } |
6c75dc0d | 2301 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 2302 | |
9369a431 | 2303 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2304 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2305 | if (!ret) |
7f714720 | 2306 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 2307 | |
6c75dc0d | 2308 | return ret; |
dce81290 TM |
2309 | } |
2310 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
2311 | ||
53113ad3 | 2312 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
2313 | { |
2314 | struct nfs_pageio_descriptor pgio; | |
2315 | ||
1acbbb4e | 2316 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
2317 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
2318 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 2319 | } |
e7dd79af | 2320 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 2321 | |
d45f60c6 | 2322 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2323 | { |
cd841605 FI |
2324 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
2325 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2326 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2327 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2328 | } |
4db6e0b7 | 2329 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2330 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
2331 | } |
2332 | ||
d20581aa BH |
2333 | /* |
2334 | * Called by non rpc-based layout drivers | |
2335 | */ | |
d45f60c6 | 2336 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 2337 | { |
bfc505de | 2338 | if (likely(!hdr->pnfs_error)) |
d45f60c6 | 2339 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
2340 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
2341 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2342 | pnfs_ld_handle_read_error(hdr); |
2343 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
2344 | } |
2345 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
2346 | ||
493292dd TM |
2347 | static void |
2348 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2349 | struct nfs_pgio_header *hdr) |
493292dd | 2350 | { |
48d635f1 | 2351 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2352 | |
4db6e0b7 | 2353 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2354 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 2355 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 2356 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 2357 | } |
d45f60c6 | 2358 | nfs_pgio_data_destroy(hdr); |
1ca018d2 | 2359 | hdr->release(hdr); |
493292dd TM |
2360 | } |
2361 | ||
64419a9b AA |
2362 | /* |
2363 | * Call the appropriate parallel I/O subsystem read function. | |
2364 | */ | |
493292dd | 2365 | static enum pnfs_try_status |
d45f60c6 | 2366 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2367 | const struct rpc_call_ops *call_ops, |
2368 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2369 | { |
cd841605 | 2370 | struct inode *inode = hdr->inode; |
64419a9b AA |
2371 | struct nfs_server *nfss = NFS_SERVER(inode); |
2372 | enum pnfs_try_status trypnfs; | |
2373 | ||
cd841605 | 2374 | hdr->mds_ops = call_ops; |
64419a9b AA |
2375 | |
2376 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2377 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2378 | |
d45f60c6 | 2379 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2380 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2381 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2382 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2383 | return trypnfs; | |
2384 | } | |
863a3c6c | 2385 | |
ceb11e13 | 2386 | /* Resend all requests through pnfs. */ |
1b1bc66b | 2387 | void pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) |
ceb11e13 PT |
2388 | { |
2389 | struct nfs_pageio_descriptor pgio; | |
2390 | ||
1b1bc66b | 2391 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
54e4a0df TM |
2392 | /* Prevent deadlocks with layoutreturn! */ |
2393 | pnfs_put_lseg(hdr->lseg); | |
2394 | hdr->lseg = NULL; | |
2395 | ||
1b1bc66b WAA |
2396 | nfs_pageio_init_read(&pgio, hdr->inode, false, |
2397 | hdr->completion_ops); | |
2398 | hdr->task.tk_status = nfs_pageio_resend(&pgio, hdr); | |
2399 | } | |
ceb11e13 PT |
2400 | } |
2401 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2402 | ||
493292dd | 2403 | static void |
7f714720 | 2404 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2405 | { |
493292dd TM |
2406 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2407 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2408 | enum pnfs_try_status trypnfs; |
493292dd | 2409 | |
d45f60c6 | 2410 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
ceb11e13 | 2411 | if (trypnfs == PNFS_TRY_AGAIN) |
1b1bc66b WAA |
2412 | pnfs_read_resend_pnfs(hdr); |
2413 | if (trypnfs == PNFS_NOT_ATTEMPTED || hdr->task.tk_status) | |
d45f60c6 | 2414 | pnfs_read_through_mds(desc, hdr); |
493292dd TM |
2415 | } |
2416 | ||
4db6e0b7 FI |
2417 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
2418 | { | |
9369a431 | 2419 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2420 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
2421 | } |
2422 | ||
493292dd TM |
2423 | int |
2424 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
2425 | { | |
4db6e0b7 | 2426 | struct nfs_pgio_header *hdr; |
493292dd TM |
2427 | int ret; |
2428 | ||
1e7f3a48 WAA |
2429 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2430 | if (!hdr) { | |
2bff2288 PT |
2431 | desc->pg_error = -ENOMEM; |
2432 | return desc->pg_error; | |
493292dd | 2433 | } |
4db6e0b7 | 2434 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 2435 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2436 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2437 | if (!ret) |
7f714720 | 2438 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 2439 | return ret; |
493292dd TM |
2440 | } |
2441 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
2442 | ||
71244d9b TM |
2443 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
2444 | { | |
2445 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
2446 | ||
2447 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 2448 | smp_mb__after_atomic(); |
71244d9b TM |
2449 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
2450 | } | |
2451 | ||
863a3c6c | 2452 | /* |
a9bae566 | 2453 | * There can be multiple RW segments. |
863a3c6c | 2454 | */ |
a9bae566 | 2455 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 2456 | { |
a9bae566 | 2457 | struct pnfs_layout_segment *lseg; |
863a3c6c | 2458 | |
a9bae566 PT |
2459 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
2460 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 2461 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
2462 | list_add(&lseg->pls_lc_list, listp); |
2463 | } | |
863a3c6c AA |
2464 | } |
2465 | ||
a073dbff TM |
2466 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
2467 | { | |
2468 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
2469 | |
2470 | /* Matched by references in pnfs_set_layoutcommit */ | |
2471 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
2472 | list_del_init(&lseg->pls_lc_list); | |
2473 | pnfs_put_lseg(lseg); | |
2474 | } | |
2475 | ||
71244d9b | 2476 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
2477 | } |
2478 | ||
1b0ae068 PT |
2479 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
2480 | { | |
b9e028fd | 2481 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
2482 | } |
2483 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
2484 | ||
863a3c6c | 2485 | void |
67af7611 TM |
2486 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
2487 | loff_t end_pos) | |
863a3c6c | 2488 | { |
cd841605 | 2489 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 2490 | bool mark_as_dirty = false; |
863a3c6c | 2491 | |
cd841605 | 2492 | spin_lock(&inode->i_lock); |
863a3c6c | 2493 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 2494 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 2495 | mark_as_dirty = true; |
863a3c6c | 2496 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 2497 | __func__, inode->i_ino); |
29559b11 TM |
2498 | } else if (end_pos > nfsi->layout->plh_lwb) |
2499 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 2500 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 2501 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 2502 | pnfs_get_lseg(lseg); |
a9bae566 | 2503 | } |
cd841605 | 2504 | spin_unlock(&inode->i_lock); |
acff5880 | 2505 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 2506 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
2507 | |
2508 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
2509 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
2510 | if (mark_as_dirty) | |
cd841605 | 2511 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
2512 | } |
2513 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
2514 | ||
db29c089 AA |
2515 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
2516 | { | |
2517 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
2518 | ||
2519 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
2520 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 2521 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
2522 | } |
2523 | ||
de4b15c7 AA |
2524 | /* |
2525 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
2526 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
2527 | * data to disk to allow the server to recover the data if it crashes. | |
2528 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
2529 | * is off, and a COMMIT is sent to a data server, or | |
2530 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
2531 | */ | |
863a3c6c | 2532 | int |
ef311537 | 2533 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 2534 | { |
5f919c9f | 2535 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
2536 | struct nfs4_layoutcommit_data *data; |
2537 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 2538 | loff_t end_pos; |
71244d9b | 2539 | int status; |
863a3c6c | 2540 | |
71244d9b | 2541 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
2542 | return 0; |
2543 | ||
71244d9b | 2544 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 2545 | |
71244d9b | 2546 | status = -EAGAIN; |
92407e75 | 2547 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
2548 | if (!sync) |
2549 | goto out; | |
74316201 | 2550 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
2551 | NFS_INO_LAYOUTCOMMITTING, |
2552 | nfs_wait_bit_killable, | |
2553 | TASK_KILLABLE); | |
92407e75 | 2554 | if (status) |
71244d9b | 2555 | goto out; |
92407e75 PT |
2556 | } |
2557 | ||
71244d9b TM |
2558 | status = -ENOMEM; |
2559 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
2560 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
2561 | if (!data) | |
2562 | goto clear_layoutcommitting; | |
2563 | ||
2564 | status = 0; | |
de4b15c7 | 2565 | spin_lock(&inode->i_lock); |
71244d9b TM |
2566 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
2567 | goto out_unlock; | |
a9bae566 | 2568 | |
71244d9b | 2569 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 2570 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 2571 | |
acff5880 | 2572 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 2573 | |
f597c537 | 2574 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
863a3c6c AA |
2575 | spin_unlock(&inode->i_lock); |
2576 | ||
2577 | data->args.inode = inode; | |
9fa40758 | 2578 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
2579 | nfs_fattr_init(&data->fattr); |
2580 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
2581 | data->res.fattr = &data->fattr; | |
2e18d4d8 TM |
2582 | if (end_pos != 0) |
2583 | data->args.lastbytewritten = end_pos - 1; | |
2584 | else | |
2585 | data->args.lastbytewritten = U64_MAX; | |
863a3c6c AA |
2586 | data->res.server = NFS_SERVER(inode); |
2587 | ||
5f919c9f CH |
2588 | if (ld->prepare_layoutcommit) { |
2589 | status = ld->prepare_layoutcommit(&data->args); | |
2590 | if (status) { | |
3471648a | 2591 | put_rpccred(data->cred); |
5f919c9f | 2592 | spin_lock(&inode->i_lock); |
29559b11 TM |
2593 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
2594 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f | 2595 | nfsi->layout->plh_lwb = end_pos; |
3471648a | 2596 | goto out_unlock; |
5f919c9f CH |
2597 | } |
2598 | } | |
2599 | ||
2600 | ||
863a3c6c AA |
2601 | status = nfs4_proc_layoutcommit(data, sync); |
2602 | out: | |
92407e75 PT |
2603 | if (status) |
2604 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
2605 | dprintk("<-- %s status %d\n", __func__, status); |
2606 | return status; | |
71244d9b TM |
2607 | out_unlock: |
2608 | spin_unlock(&inode->i_lock); | |
92407e75 | 2609 | kfree(data); |
71244d9b TM |
2610 | clear_layoutcommitting: |
2611 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 2612 | goto out; |
863a3c6c | 2613 | } |
72cff449 | 2614 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 2615 | |
5bb89b47 TM |
2616 | int |
2617 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
2618 | { | |
2619 | return pnfs_layoutcommit_inode(inode, true); | |
2620 | } | |
2621 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
2622 | ||
82be417a AA |
2623 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
2624 | { | |
2625 | struct nfs4_threshold *thp; | |
2626 | ||
2627 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
2628 | if (!thp) { | |
2629 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
2630 | return NULL; | |
2631 | } | |
2632 | return thp; | |
2633 | } | |
8733408d | 2634 | |
865a7ecb | 2635 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d | 2636 | int |
c8ad8894 | 2637 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
8733408d PT |
2638 | { |
2639 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
2640 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 2641 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
2642 | struct nfs42_layoutstat_data *data; |
2643 | struct pnfs_layout_hdr *hdr; | |
2644 | int status = 0; | |
2645 | ||
2646 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
2647 | goto out; | |
2648 | ||
6c5a0d89 TM |
2649 | if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS)) |
2650 | goto out; | |
2651 | ||
1bfe3b25 PT |
2652 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
2653 | goto out; | |
2654 | ||
8733408d PT |
2655 | spin_lock(&inode->i_lock); |
2656 | if (!NFS_I(inode)->layout) { | |
2657 | spin_unlock(&inode->i_lock); | |
f538d0ba | 2658 | goto out_clear_layoutstats; |
8733408d PT |
2659 | } |
2660 | hdr = NFS_I(inode)->layout; | |
2661 | pnfs_get_layout_hdr(hdr); | |
2662 | spin_unlock(&inode->i_lock); | |
2663 | ||
c8ad8894 | 2664 | data = kzalloc(sizeof(*data), gfp_flags); |
8733408d PT |
2665 | if (!data) { |
2666 | status = -ENOMEM; | |
2667 | goto out_put; | |
2668 | } | |
2669 | ||
2670 | data->args.fh = NFS_FH(inode); | |
2671 | data->args.inode = inode; | |
8733408d PT |
2672 | status = ld->prepare_layoutstats(&data->args); |
2673 | if (status) | |
2674 | goto out_free; | |
2675 | ||
2676 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
2677 | ||
2678 | out: | |
2679 | dprintk("%s returns %d\n", __func__, status); | |
2680 | return status; | |
2681 | ||
2682 | out_free: | |
2683 | kfree(data); | |
2684 | out_put: | |
2685 | pnfs_put_layout_hdr(hdr); | |
f538d0ba | 2686 | out_clear_layoutstats: |
1bfe3b25 PT |
2687 | smp_mb__before_atomic(); |
2688 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
2689 | smp_mb__after_atomic(); | |
8733408d PT |
2690 | goto out; |
2691 | } | |
2692 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 2693 | #endif |
bbf58bf3 TM |
2694 | |
2695 | unsigned int layoutstats_timer; | |
2696 | module_param(layoutstats_timer, uint, 0644); | |
2697 | EXPORT_SYMBOL_GPL(layoutstats_timer); |