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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" |
1b146fcf | 40 | #include "nfs4_fs.h" |
85e174ba RL |
41 | |
42 | #define NFSDBG_FACILITY NFSDBG_PNFS | |
25c75333 | 43 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
85e174ba | 44 | |
02c35fca FI |
45 | /* Locking: |
46 | * | |
47 | * pnfs_spinlock: | |
48 | * protects pnfs_modules_tbl. | |
49 | */ | |
50 | static DEFINE_SPINLOCK(pnfs_spinlock); | |
51 | ||
52 | /* | |
53 | * pnfs_modules_tbl holds all pnfs modules | |
54 | */ | |
55 | static LIST_HEAD(pnfs_modules_tbl); | |
56 | ||
13c13a6a | 57 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo); |
68f74479 TM |
58 | static void pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo, |
59 | struct list_head *free_me, | |
60 | const struct pnfs_layout_range *range, | |
61 | u32 seq); | |
fe1cf946 TM |
62 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
63 | struct list_head *tmp_list); | |
aa1e0e3a | 64 | |
02c35fca FI |
65 | /* Return the registered pnfs layout driver module matching given id */ |
66 | static struct pnfs_layoutdriver_type * | |
67 | find_pnfs_driver_locked(u32 id) | |
68 | { | |
69 | struct pnfs_layoutdriver_type *local; | |
70 | ||
71 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) | |
72 | if (local->id == id) | |
73 | goto out; | |
74 | local = NULL; | |
75 | out: | |
76 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); | |
77 | return local; | |
78 | } | |
79 | ||
85e174ba RL |
80 | static struct pnfs_layoutdriver_type * |
81 | find_pnfs_driver(u32 id) | |
82 | { | |
02c35fca FI |
83 | struct pnfs_layoutdriver_type *local; |
84 | ||
85 | spin_lock(&pnfs_spinlock); | |
86 | local = find_pnfs_driver_locked(id); | |
0a9c63fa TM |
87 | if (local != NULL && !try_module_get(local->owner)) { |
88 | dprintk("%s: Could not grab reference on module\n", __func__); | |
89 | local = NULL; | |
90 | } | |
02c35fca FI |
91 | spin_unlock(&pnfs_spinlock); |
92 | return local; | |
85e174ba RL |
93 | } |
94 | ||
95 | void | |
96 | unset_pnfs_layoutdriver(struct nfs_server *nfss) | |
97 | { | |
738fd0f3 BH |
98 | if (nfss->pnfs_curr_ld) { |
99 | if (nfss->pnfs_curr_ld->clear_layoutdriver) | |
100 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); | |
2a4c8994 TM |
101 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
102 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) | |
103 | nfs4_deviceid_purge_client(nfss->nfs_client); | |
02c35fca | 104 | module_put(nfss->pnfs_curr_ld->owner); |
738fd0f3 | 105 | } |
85e174ba RL |
106 | nfss->pnfs_curr_ld = NULL; |
107 | } | |
108 | ||
ca440c38 JL |
109 | /* |
110 | * When the server sends a list of layout types, we choose one in the order | |
111 | * given in the list below. | |
112 | * | |
113 | * FIXME: should this list be configurable in some fashion? module param? | |
114 | * mount option? something else? | |
115 | */ | |
116 | static const u32 ld_prefs[] = { | |
117 | LAYOUT_SCSI, | |
118 | LAYOUT_BLOCK_VOLUME, | |
119 | LAYOUT_OSD2_OBJECTS, | |
120 | LAYOUT_FLEX_FILES, | |
121 | LAYOUT_NFSV4_1_FILES, | |
122 | 0 | |
123 | }; | |
124 | ||
125 | static int | |
126 | ld_cmp(const void *e1, const void *e2) | |
127 | { | |
128 | u32 ld1 = *((u32 *)e1); | |
129 | u32 ld2 = *((u32 *)e2); | |
130 | int i; | |
131 | ||
132 | for (i = 0; ld_prefs[i] != 0; i++) { | |
133 | if (ld1 == ld_prefs[i]) | |
134 | return -1; | |
135 | ||
136 | if (ld2 == ld_prefs[i]) | |
137 | return 1; | |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
85e174ba RL |
142 | /* |
143 | * Try to set the server's pnfs module to the pnfs layout type specified by id. | |
144 | * Currently only one pNFS layout driver per filesystem is supported. | |
145 | * | |
3132e49e | 146 | * @ids array of layout types supported by MDS. |
85e174ba RL |
147 | */ |
148 | void | |
738fd0f3 | 149 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
ca440c38 | 150 | struct nfs_fsinfo *fsinfo) |
85e174ba RL |
151 | { |
152 | struct pnfs_layoutdriver_type *ld_type = NULL; | |
3132e49e | 153 | u32 id; |
ca440c38 | 154 | int i; |
85e174ba | 155 | |
19274716 AS |
156 | if (fsinfo->nlayouttypes == 0) |
157 | goto out_no_driver; | |
85e174ba RL |
158 | if (!(server->nfs_client->cl_exchange_flags & |
159 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { | |
3132e49e JL |
160 | printk(KERN_ERR "NFS: %s: cl_exchange_flags 0x%x\n", |
161 | __func__, server->nfs_client->cl_exchange_flags); | |
85e174ba RL |
162 | goto out_no_driver; |
163 | } | |
3132e49e | 164 | |
ca440c38 JL |
165 | sort(fsinfo->layouttype, fsinfo->nlayouttypes, |
166 | sizeof(*fsinfo->layouttype), ld_cmp, NULL); | |
3132e49e | 167 | |
ca440c38 JL |
168 | for (i = 0; i < fsinfo->nlayouttypes; i++) { |
169 | id = fsinfo->layouttype[i]; | |
85e174ba | 170 | ld_type = find_pnfs_driver(id); |
ca440c38 JL |
171 | if (!ld_type) { |
172 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, | |
173 | id); | |
174 | ld_type = find_pnfs_driver(id); | |
175 | } | |
176 | if (ld_type) | |
177 | break; | |
85e174ba | 178 | } |
3132e49e JL |
179 | |
180 | if (!ld_type) { | |
ca440c38 | 181 | dprintk("%s: No pNFS module found!\n", __func__); |
3132e49e JL |
182 | goto out_no_driver; |
183 | } | |
184 | ||
85e174ba | 185 | server->pnfs_curr_ld = ld_type; |
738fd0f3 BH |
186 | if (ld_type->set_layoutdriver |
187 | && ld_type->set_layoutdriver(server, mntfh)) { | |
a030889a WAA |
188 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
189 | "driver %u.\n", __func__, id); | |
738fd0f3 BH |
190 | module_put(ld_type->owner); |
191 | goto out_no_driver; | |
192 | } | |
2a4c8994 TM |
193 | /* Bump the MDS count */ |
194 | atomic_inc(&server->nfs_client->cl_mds_count); | |
ea8eecdd | 195 | |
85e174ba RL |
196 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
197 | return; | |
198 | ||
199 | out_no_driver: | |
200 | dprintk("%s: Using NFSv4 I/O\n", __func__); | |
201 | server->pnfs_curr_ld = NULL; | |
202 | } | |
02c35fca FI |
203 | |
204 | int | |
205 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
206 | { | |
207 | int status = -EINVAL; | |
208 | struct pnfs_layoutdriver_type *tmp; | |
209 | ||
210 | if (ld_type->id == 0) { | |
a030889a | 211 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
02c35fca FI |
212 | return status; |
213 | } | |
b1f69b75 | 214 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
a030889a | 215 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
b1f69b75 AA |
216 | "alloc_lseg and free_lseg.\n", __func__); |
217 | return status; | |
218 | } | |
02c35fca FI |
219 | |
220 | spin_lock(&pnfs_spinlock); | |
221 | tmp = find_pnfs_driver_locked(ld_type->id); | |
222 | if (!tmp) { | |
223 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); | |
224 | status = 0; | |
225 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, | |
226 | ld_type->name); | |
227 | } else { | |
a030889a | 228 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
02c35fca FI |
229 | __func__, ld_type->id); |
230 | } | |
231 | spin_unlock(&pnfs_spinlock); | |
232 | ||
233 | return status; | |
234 | } | |
235 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); | |
236 | ||
237 | void | |
238 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) | |
239 | { | |
240 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); | |
241 | spin_lock(&pnfs_spinlock); | |
242 | list_del(&ld_type->pnfs_tblid); | |
243 | spin_unlock(&pnfs_spinlock); | |
244 | } | |
245 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); | |
e5e94017 | 246 | |
b1f69b75 AA |
247 | /* |
248 | * pNFS client layout cache | |
249 | */ | |
250 | ||
cc6e5340 | 251 | /* Need to hold i_lock if caller does not already hold reference */ |
43f1b3da | 252 | void |
70c3bd2b | 253 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 254 | { |
2b28a7be | 255 | refcount_inc(&lo->plh_refcount); |
e5e94017 BH |
256 | } |
257 | ||
636fb9c8 BH |
258 | static struct pnfs_layout_hdr * |
259 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) | |
260 | { | |
261 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
57934278 | 262 | return ld->alloc_layout_hdr(ino, gfp_flags); |
636fb9c8 BH |
263 | } |
264 | ||
265 | static void | |
266 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
267 | { | |
9c626381 TM |
268 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
269 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; | |
270 | ||
cf6605d1 | 271 | if (test_and_clear_bit(NFS_LAYOUT_HASHED, &lo->plh_flags)) { |
9c626381 TM |
272 | struct nfs_client *clp = server->nfs_client; |
273 | ||
274 | spin_lock(&clp->cl_lock); | |
cf6605d1 | 275 | list_del_rcu(&lo->plh_layouts); |
9c626381 TM |
276 | spin_unlock(&clp->cl_lock); |
277 | } | |
a52458b4 | 278 | put_cred(lo->plh_lc_cred); |
57934278 | 279 | return ld->free_layout_hdr(lo); |
636fb9c8 BH |
280 | } |
281 | ||
e5e94017 | 282 | static void |
6622c3ea | 283 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
e5e94017 | 284 | { |
bb346f63 | 285 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
cc6e5340 | 286 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
bb346f63 TM |
287 | nfsi->layout = NULL; |
288 | /* Reset MDS Threshold I/O counters */ | |
289 | nfsi->write_io = 0; | |
290 | nfsi->read_io = 0; | |
e5e94017 BH |
291 | } |
292 | ||
b1f69b75 | 293 | void |
70c3bd2b | 294 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
974cec8c | 295 | { |
9c6376eb | 296 | struct inode *inode; |
b6d49ecd | 297 | unsigned long i_state; |
cc6e5340 | 298 | |
9c6376eb TM |
299 | if (!lo) |
300 | return; | |
301 | inode = lo->plh_inode; | |
13c13a6a TM |
302 | pnfs_layoutreturn_before_put_layout_hdr(lo); |
303 | ||
2b28a7be | 304 | if (refcount_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
566f8737 PT |
305 | if (!list_empty(&lo->plh_segs)) |
306 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); | |
6622c3ea | 307 | pnfs_detach_layout_hdr(lo); |
b6d49ecd | 308 | i_state = inode->i_state; |
cc6e5340 | 309 | spin_unlock(&inode->i_lock); |
6622c3ea | 310 | pnfs_free_layout_hdr(lo); |
b6d49ecd TM |
311 | /* Notify pnfs_destroy_layout_final() that we're done */ |
312 | if (i_state & (I_FREEING | I_CLEAR)) | |
313 | wake_up_var(lo); | |
cc6e5340 | 314 | } |
974cec8c AA |
315 | } |
316 | ||
b5fdf841 TM |
317 | static struct inode * |
318 | pnfs_grab_inode_layout_hdr(struct pnfs_layout_hdr *lo) | |
319 | { | |
320 | struct inode *inode = igrab(lo->plh_inode); | |
321 | if (inode) | |
322 | return inode; | |
323 | set_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags); | |
324 | return NULL; | |
325 | } | |
326 | ||
1bcf34fd TM |
327 | /* |
328 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
329 | * taking into account wraparound issues. | |
330 | */ | |
331 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
332 | { | |
333 | return (s32)(s1 - s2) > 0; | |
334 | } | |
335 | ||
336 | static void pnfs_barrier_update(struct pnfs_layout_hdr *lo, u32 newseq) | |
337 | { | |
338 | if (pnfs_seqid_is_newer(newseq, lo->plh_barrier)) | |
339 | lo->plh_barrier = newseq; | |
340 | } | |
341 | ||
4aab9732 TM |
342 | static void |
343 | pnfs_set_plh_return_info(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode, | |
344 | u32 seq) | |
345 | { | |
346 | if (lo->plh_return_iomode != 0 && lo->plh_return_iomode != iomode) | |
347 | iomode = IOMODE_ANY; | |
348 | lo->plh_return_iomode = iomode; | |
349 | set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); | |
350 | if (seq != 0) { | |
351 | WARN_ON_ONCE(lo->plh_return_seq != 0 && lo->plh_return_seq != seq); | |
352 | lo->plh_return_seq = seq; | |
1bcf34fd | 353 | pnfs_barrier_update(lo, seq); |
4aab9732 TM |
354 | } |
355 | } | |
356 | ||
ae5a459d TM |
357 | static void |
358 | pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo) | |
359 | { | |
5466d214 | 360 | struct pnfs_layout_segment *lseg; |
ae5a459d TM |
361 | lo->plh_return_iomode = 0; |
362 | lo->plh_return_seq = 0; | |
363 | clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); | |
5466d214 TM |
364 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
365 | if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
366 | continue; | |
367 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); | |
368 | } | |
ae5a459d TM |
369 | } |
370 | ||
362fb578 TM |
371 | static void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
372 | { | |
373 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
374 | clear_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags); | |
375 | smp_mb__after_atomic(); | |
376 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
377 | rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); | |
378 | } | |
379 | ||
fe1cf946 TM |
380 | static void |
381 | pnfs_clear_lseg_state(struct pnfs_layout_segment *lseg, | |
382 | struct list_head *free_me) | |
383 | { | |
384 | clear_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
385 | clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
386 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) | |
387 | pnfs_lseg_dec_and_remove_zero(lseg, free_me); | |
388 | if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
389 | pnfs_lseg_dec_and_remove_zero(lseg, free_me); | |
390 | } | |
391 | ||
7380020e | 392 | /* |
30cb3ee2 TM |
393 | * Update the seqid of a layout stateid after receiving |
394 | * NFS4ERR_OLD_STATEID | |
7380020e | 395 | */ |
30cb3ee2 | 396 | bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, |
ecf84026 TM |
397 | struct pnfs_layout_range *dst_range, |
398 | struct inode *inode) | |
7380020e TM |
399 | { |
400 | struct pnfs_layout_hdr *lo; | |
c16467dc TM |
401 | struct pnfs_layout_range range = { |
402 | .iomode = IOMODE_ANY, | |
403 | .offset = 0, | |
404 | .length = NFS4_MAX_UINT64, | |
405 | }; | |
7380020e | 406 | bool ret = false; |
c16467dc TM |
407 | LIST_HEAD(head); |
408 | int err; | |
7380020e TM |
409 | |
410 | spin_lock(&inode->i_lock); | |
411 | lo = NFS_I(inode)->layout; | |
30cb3ee2 TM |
412 | if (lo && pnfs_layout_is_valid(lo) && |
413 | nfs4_stateid_match_other(dst, &lo->plh_stateid)) { | |
414 | /* Is our call using the most recent seqid? If so, bump it */ | |
415 | if (!nfs4_stateid_is_newer(&lo->plh_stateid, dst)) { | |
416 | nfs4_stateid_seqid_inc(dst); | |
417 | ret = true; | |
418 | goto out; | |
419 | } | |
420 | /* Try to update the seqid to the most recent */ | |
c16467dc TM |
421 | err = pnfs_mark_matching_lsegs_return(lo, &head, &range, 0); |
422 | if (err != -EBUSY) { | |
423 | dst->seqid = lo->plh_stateid.seqid; | |
ecf84026 | 424 | *dst_range = range; |
c16467dc TM |
425 | ret = true; |
426 | } | |
7380020e | 427 | } |
30cb3ee2 | 428 | out: |
7380020e | 429 | spin_unlock(&inode->i_lock); |
c16467dc | 430 | pnfs_free_lseg_list(&head); |
7380020e TM |
431 | return ret; |
432 | } | |
433 | ||
2454dfea TM |
434 | /* |
435 | * Mark a pnfs_layout_hdr and all associated layout segments as invalid | |
436 | * | |
437 | * In order to continue using the pnfs_layout_hdr, a full recovery | |
438 | * is required. | |
439 | * Note that caller must hold inode->i_lock. | |
440 | */ | |
5f46be04 | 441 | int |
2454dfea TM |
442 | pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, |
443 | struct list_head *lseg_list) | |
444 | { | |
445 | struct pnfs_layout_range range = { | |
446 | .iomode = IOMODE_ANY, | |
447 | .offset = 0, | |
448 | .length = NFS4_MAX_UINT64, | |
449 | }; | |
fe1cf946 | 450 | struct pnfs_layout_segment *lseg, *next; |
2454dfea TM |
451 | |
452 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
fe1cf946 TM |
453 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
454 | pnfs_clear_lseg_state(lseg, lseg_list); | |
5466d214 | 455 | pnfs_clear_layoutreturn_info(lo); |
68f74479 | 456 | pnfs_free_returned_lsegs(lo, lseg_list, &range, 0); |
362fb578 TM |
457 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) && |
458 | !test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) | |
459 | pnfs_clear_layoutreturn_waitbit(lo); | |
fe1cf946 | 460 | return !list_empty(&lo->plh_segs); |
2454dfea TM |
461 | } |
462 | ||
b9e028fd TM |
463 | static int |
464 | pnfs_iomode_to_fail_bit(u32 iomode) | |
465 | { | |
466 | return iomode == IOMODE_RW ? | |
467 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
468 | } | |
469 | ||
470 | static void | |
3e621214 | 471 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 472 | { |
25c75333 | 473 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 474 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
2b28a7be | 475 | refcount_inc(&lo->plh_refcount); |
3e621214 TM |
476 | } |
477 | ||
478 | static void | |
479 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
480 | { | |
481 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
2b28a7be | 482 | refcount_dec(&lo->plh_refcount); |
3e621214 TM |
483 | } |
484 | ||
485 | static void | |
486 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
487 | { | |
488 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
489 | struct pnfs_layout_range range = { |
490 | .iomode = iomode, | |
491 | .offset = 0, | |
492 | .length = NFS4_MAX_UINT64, | |
493 | }; | |
494 | LIST_HEAD(head); | |
3e621214 TM |
495 | |
496 | spin_lock(&inode->i_lock); | |
497 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
6d597e17 | 498 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range, 0); |
3e621214 | 499 | spin_unlock(&inode->i_lock); |
115ce575 | 500 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
501 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
502 | iomode == IOMODE_RW ? "RW" : "READ"); | |
503 | } | |
504 | ||
505 | static bool | |
506 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
507 | { | |
25c75333 | 508 | unsigned long start, end; |
3e621214 TM |
509 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
510 | ||
511 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
512 | return false; |
513 | end = jiffies; | |
514 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
515 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
516 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 517 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
518 | return false; |
519 | } | |
520 | return true; | |
b9e028fd TM |
521 | } |
522 | ||
974cec8c | 523 | static void |
119cef97 TM |
524 | pnfs_init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg, |
525 | const struct pnfs_layout_range *range, | |
526 | const nfs4_stateid *stateid) | |
974cec8c | 527 | { |
566052c5 | 528 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 529 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
a9901899 | 530 | INIT_LIST_HEAD(&lseg->pls_commits); |
eba6dd69 | 531 | refcount_set(&lseg->pls_refcount, 1); |
4541d16c | 532 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); |
566052c5 | 533 | lseg->pls_layout = lo; |
119cef97 TM |
534 | lseg->pls_range = *range; |
535 | lseg->pls_seq = be32_to_cpu(stateid->seqid); | |
974cec8c AA |
536 | } |
537 | ||
905ca191 | 538 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 539 | { |
68f74479 TM |
540 | if (lseg != NULL) { |
541 | struct inode *inode = lseg->pls_layout->plh_inode; | |
542 | NFS_SERVER(inode)->pnfs_curr_ld->free_lseg(lseg); | |
543 | } | |
974cec8c AA |
544 | } |
545 | ||
d684d2ae | 546 | static void |
57036a37 TM |
547 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
548 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 549 | { |
d20581aa | 550 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 551 | list_del_init(&lseg->pls_list); |
8f0d27dc | 552 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
2b28a7be | 553 | refcount_dec(&lo->plh_refcount); |
abb3e1c8 TM |
554 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) |
555 | return; | |
7b650994 TM |
556 | if (list_empty(&lo->plh_segs) && |
557 | !test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) && | |
558 | !test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { | |
334a8f37 TM |
559 | if (atomic_read(&lo->plh_outstanding) == 0) |
560 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
173f77e9 | 561 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
2d148c7e | 562 | } |
d684d2ae FI |
563 | } |
564 | ||
68f74479 TM |
565 | static bool |
566 | pnfs_cache_lseg_for_layoutreturn(struct pnfs_layout_hdr *lo, | |
567 | struct pnfs_layout_segment *lseg) | |
568 | { | |
569 | if (test_and_clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && | |
570 | pnfs_layout_is_valid(lo)) { | |
4aab9732 | 571 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); |
68f74479 TM |
572 | list_move_tail(&lseg->pls_list, &lo->plh_return_segs); |
573 | return true; | |
574 | } | |
575 | return false; | |
576 | } | |
577 | ||
bae724ef | 578 | void |
9369a431 | 579 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 580 | { |
57036a37 | 581 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
582 | struct inode *inode; |
583 | ||
584 | if (!lseg) | |
585 | return; | |
586 | ||
4541d16c | 587 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
eba6dd69 | 588 | refcount_read(&lseg->pls_refcount), |
4541d16c | 589 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
4ef2e4f8 | 590 | |
57036a37 TM |
591 | lo = lseg->pls_layout; |
592 | inode = lo->plh_inode; | |
4ef2e4f8 | 593 | |
eba6dd69 | 594 | if (refcount_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
faa4a54f TM |
595 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
596 | spin_unlock(&inode->i_lock); | |
597 | return; | |
598 | } | |
8f0d27dc | 599 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 | 600 | pnfs_layout_remove_lseg(lo, lseg); |
68f74479 TM |
601 | if (pnfs_cache_lseg_for_layoutreturn(lo, lseg)) |
602 | lseg = NULL; | |
4ef2e4f8 TM |
603 | spin_unlock(&inode->i_lock); |
604 | pnfs_free_lseg(lseg); | |
605 | pnfs_put_layout_hdr(lo); | |
4541d16c | 606 | } |
4541d16c | 607 | } |
9369a431 | 608 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 609 | |
fb3296eb BH |
610 | /* |
611 | * is l2 fully contained in l1? | |
612 | * start1 end1 | |
613 | * [----------------------------------) | |
614 | * start2 end2 | |
615 | * [----------------) | |
616 | */ | |
3cb2df17 | 617 | static bool |
7dc0ac70 | 618 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 619 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
620 | { |
621 | u64 start1 = l1->offset; | |
17822b20 | 622 | u64 end1 = pnfs_end_offset(start1, l1->length); |
fb3296eb | 623 | u64 start2 = l2->offset; |
17822b20 | 624 | u64 end2 = pnfs_end_offset(start2, l2->length); |
fb3296eb BH |
625 | |
626 | return (start1 <= start2) && (end1 >= end2); | |
627 | } | |
628 | ||
24956804 TM |
629 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
630 | struct list_head *tmp_list) | |
631 | { | |
eba6dd69 | 632 | if (!refcount_dec_and_test(&lseg->pls_refcount)) |
24956804 TM |
633 | return false; |
634 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
635 | list_add(&lseg->pls_list, tmp_list); | |
636 | return true; | |
637 | } | |
638 | ||
4541d16c FI |
639 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
640 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
641 | struct list_head *tmp_list) | |
642 | { | |
643 | int rv = 0; | |
644 | ||
645 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
646 | /* Remove the reference keeping the lseg in the | |
647 | * list. It will now be removed when all | |
648 | * outstanding io is finished. | |
649 | */ | |
d684d2ae | 650 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
eba6dd69 | 651 | refcount_read(&lseg->pls_refcount)); |
24956804 | 652 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 653 | rv = 1; |
4541d16c FI |
654 | } |
655 | return rv; | |
656 | } | |
657 | ||
e036f464 TM |
658 | static bool |
659 | pnfs_should_free_range(const struct pnfs_layout_range *lseg_range, | |
660 | const struct pnfs_layout_range *recall_range) | |
661 | { | |
662 | return (recall_range->iomode == IOMODE_ANY || | |
663 | lseg_range->iomode == recall_range->iomode) && | |
664 | pnfs_lseg_range_intersecting(lseg_range, recall_range); | |
665 | } | |
666 | ||
667 | static bool | |
668 | pnfs_match_lseg_recall(const struct pnfs_layout_segment *lseg, | |
669 | const struct pnfs_layout_range *recall_range, | |
670 | u32 seq) | |
671 | { | |
672 | if (seq != 0 && pnfs_seqid_is_newer(lseg->pls_seq, seq)) | |
673 | return false; | |
674 | if (recall_range == NULL) | |
675 | return true; | |
676 | return pnfs_should_free_range(&lseg->pls_range, recall_range); | |
677 | } | |
678 | ||
6d597e17 JL |
679 | /** |
680 | * pnfs_mark_matching_lsegs_invalid - tear down lsegs or mark them for later | |
681 | * @lo: layout header containing the lsegs | |
682 | * @tmp_list: list head where doomed lsegs should go | |
683 | * @recall_range: optional recall range argument to match (may be NULL) | |
684 | * @seq: only invalidate lsegs obtained prior to this sequence (may be 0) | |
685 | * | |
686 | * Walk the list of lsegs in the layout header, and tear down any that should | |
687 | * be destroyed. If "recall_range" is specified then the segment must match | |
688 | * that range. If "seq" is non-zero, then only match segments that were handed | |
689 | * out at or before that sequence. | |
690 | * | |
691 | * Returns number of matching invalid lsegs remaining in list after scanning | |
692 | * it and purging them. | |
4541d16c | 693 | */ |
43f1b3da | 694 | int |
49a85061 | 695 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 696 | struct list_head *tmp_list, |
6d597e17 JL |
697 | const struct pnfs_layout_range *recall_range, |
698 | u32 seq) | |
974cec8c AA |
699 | { |
700 | struct pnfs_layout_segment *lseg, *next; | |
71b39854 | 701 | int remaining = 0; |
974cec8c AA |
702 | |
703 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
704 | ||
8006bfba | 705 | if (list_empty(&lo->plh_segs)) |
38511722 | 706 | return 0; |
4541d16c | 707 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
e036f464 | 708 | if (pnfs_match_lseg_recall(lseg, recall_range, seq)) { |
b3dce6a2 | 709 | dprintk("%s: freeing lseg %p iomode %d seq %u " |
4541d16c | 710 | "offset %llu length %llu\n", __func__, |
6d597e17 JL |
711 | lseg, lseg->pls_range.iomode, lseg->pls_seq, |
712 | lseg->pls_range.offset, lseg->pls_range.length); | |
71b39854 TM |
713 | if (!mark_lseg_invalid(lseg, tmp_list)) |
714 | remaining++; | |
4541d16c | 715 | } |
71b39854 TM |
716 | dprintk("%s:Return %i\n", __func__, remaining); |
717 | return remaining; | |
974cec8c AA |
718 | } |
719 | ||
68f74479 TM |
720 | static void |
721 | pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo, | |
722 | struct list_head *free_me, | |
723 | const struct pnfs_layout_range *range, | |
724 | u32 seq) | |
725 | { | |
726 | struct pnfs_layout_segment *lseg, *next; | |
727 | ||
728 | list_for_each_entry_safe(lseg, next, &lo->plh_return_segs, pls_list) { | |
729 | if (pnfs_match_lseg_recall(lseg, range, seq)) | |
730 | list_move_tail(&lseg->pls_list, free_me); | |
731 | } | |
732 | } | |
733 | ||
f49f9baa | 734 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 735 | void |
4541d16c | 736 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 737 | { |
4541d16c | 738 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
739 | |
740 | if (list_empty(free_me)) | |
741 | return; | |
742 | ||
4541d16c | 743 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 744 | list_del(&lseg->pls_list); |
905ca191 | 745 | pnfs_free_lseg(lseg); |
974cec8c AA |
746 | } |
747 | } | |
748 | ||
b6d49ecd | 749 | static struct pnfs_layout_hdr *__pnfs_destroy_layout(struct nfs_inode *nfsi) |
e5e94017 BH |
750 | { |
751 | struct pnfs_layout_hdr *lo; | |
974cec8c | 752 | LIST_HEAD(tmp_list); |
e5e94017 BH |
753 | |
754 | spin_lock(&nfsi->vfs_inode.i_lock); | |
755 | lo = nfsi->layout; | |
756 | if (lo) { | |
3e621214 | 757 | pnfs_get_layout_hdr(lo); |
2454dfea | 758 | pnfs_mark_layout_stateid_invalid(lo, &tmp_list); |
3e621214 TM |
759 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
760 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
761 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
762 | pnfs_free_lseg_list(&tmp_list); | |
1f18b82c | 763 | nfs_commit_inode(&nfsi->vfs_inode, 0); |
3e621214 TM |
764 | pnfs_put_layout_hdr(lo); |
765 | } else | |
766 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
b6d49ecd TM |
767 | return lo; |
768 | } | |
769 | ||
770 | void pnfs_destroy_layout(struct nfs_inode *nfsi) | |
771 | { | |
772 | __pnfs_destroy_layout(nfsi); | |
974cec8c | 773 | } |
041245c8 | 774 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 775 | |
b6d49ecd TM |
776 | static bool pnfs_layout_removed(struct nfs_inode *nfsi, |
777 | struct pnfs_layout_hdr *lo) | |
778 | { | |
779 | bool ret; | |
780 | ||
781 | spin_lock(&nfsi->vfs_inode.i_lock); | |
782 | ret = nfsi->layout != lo; | |
783 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
784 | return ret; | |
785 | } | |
786 | ||
787 | void pnfs_destroy_layout_final(struct nfs_inode *nfsi) | |
788 | { | |
789 | struct pnfs_layout_hdr *lo = __pnfs_destroy_layout(nfsi); | |
790 | ||
791 | if (lo) | |
792 | wait_var_event(lo, pnfs_layout_removed(nfsi, lo)); | |
793 | } | |
794 | ||
fd9a8d71 TM |
795 | static bool |
796 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
797 | struct list_head *layout_list) | |
974cec8c AA |
798 | { |
799 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 800 | bool ret = false; |
974cec8c | 801 | |
fd9a8d71 TM |
802 | spin_lock(&inode->i_lock); |
803 | lo = NFS_I(inode)->layout; | |
804 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
805 | pnfs_get_layout_hdr(lo); | |
806 | list_add(&lo->plh_bulk_destroy, layout_list); | |
807 | ret = true; | |
808 | } | |
809 | spin_unlock(&inode->i_lock); | |
810 | return ret; | |
811 | } | |
812 | ||
813 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
814 | static int | |
815 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
816 | struct nfs_server *server, | |
817 | struct list_head *layout_list) | |
5085607d TM |
818 | __must_hold(&clp->cl_lock) |
819 | __must_hold(RCU) | |
fd9a8d71 TM |
820 | { |
821 | struct pnfs_layout_hdr *lo, *next; | |
822 | struct inode *inode; | |
823 | ||
824 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
5085607d TM |
825 | if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || |
826 | test_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags) || | |
827 | !list_empty(&lo->plh_bulk_destroy)) | |
b85f5620 | 828 | continue; |
5085607d TM |
829 | /* If the sb is being destroyed, just bail */ |
830 | if (!nfs_sb_active(server->super)) | |
831 | break; | |
b5fdf841 | 832 | inode = pnfs_grab_inode_layout_hdr(lo); |
5085607d | 833 | if (inode != NULL) { |
cf6605d1 TM |
834 | if (test_and_clear_bit(NFS_LAYOUT_HASHED, &lo->plh_flags)) |
835 | list_del_rcu(&lo->plh_layouts); | |
5085607d TM |
836 | if (pnfs_layout_add_bulk_destroy_list(inode, |
837 | layout_list)) | |
838 | continue; | |
839 | rcu_read_unlock(); | |
840 | spin_unlock(&clp->cl_lock); | |
841 | iput(inode); | |
842 | } else { | |
843 | rcu_read_unlock(); | |
844 | spin_unlock(&clp->cl_lock); | |
5085607d TM |
845 | } |
846 | nfs_sb_deactive(server->super); | |
fd9a8d71 TM |
847 | spin_lock(&clp->cl_lock); |
848 | rcu_read_lock(); | |
849 | return -EAGAIN; | |
850 | } | |
851 | return 0; | |
852 | } | |
853 | ||
854 | static int | |
855 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
856 | bool is_bulk_recall) | |
857 | { | |
858 | struct pnfs_layout_hdr *lo; | |
859 | struct inode *inode; | |
fd9a8d71 TM |
860 | LIST_HEAD(lseg_list); |
861 | int ret = 0; | |
862 | ||
863 | while (!list_empty(layout_list)) { | |
864 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
865 | plh_bulk_destroy); | |
866 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
867 | lo->plh_inode->i_ino); | |
868 | inode = lo->plh_inode; | |
7c5d1875 CH |
869 | |
870 | pnfs_layoutcommit_inode(inode, false); | |
871 | ||
fd9a8d71 TM |
872 | spin_lock(&inode->i_lock); |
873 | list_del_init(&lo->plh_bulk_destroy); | |
9fd4b9fc TM |
874 | if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) { |
875 | if (is_bulk_recall) | |
876 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
fd9a8d71 | 877 | ret = -EAGAIN; |
9fd4b9fc | 878 | } |
fd9a8d71 TM |
879 | spin_unlock(&inode->i_lock); |
880 | pnfs_free_lseg_list(&lseg_list); | |
b20135d0 TM |
881 | /* Free all lsegs that are attached to commit buckets */ |
882 | nfs_commit_inode(inode, 0); | |
fd9a8d71 | 883 | pnfs_put_layout_hdr(lo); |
5085607d | 884 | nfs_iput_and_deactive(inode); |
fd9a8d71 TM |
885 | } |
886 | return ret; | |
887 | } | |
888 | ||
889 | int | |
890 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
891 | struct nfs_fsid *fsid, | |
892 | bool is_recall) | |
893 | { | |
894 | struct nfs_server *server; | |
895 | LIST_HEAD(layout_list); | |
c47abcf8 | 896 | |
974cec8c | 897 | spin_lock(&clp->cl_lock); |
6382a441 | 898 | rcu_read_lock(); |
fd9a8d71 | 899 | restart: |
6382a441 | 900 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
901 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
902 | continue; | |
903 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
904 | server, | |
905 | &layout_list) != 0) | |
906 | goto restart; | |
6382a441 WAA |
907 | } |
908 | rcu_read_unlock(); | |
974cec8c AA |
909 | spin_unlock(&clp->cl_lock); |
910 | ||
fd9a8d71 TM |
911 | if (list_empty(&layout_list)) |
912 | return 0; | |
913 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
914 | } | |
915 | ||
916 | int | |
917 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
918 | bool is_recall) | |
919 | { | |
920 | struct nfs_server *server; | |
921 | LIST_HEAD(layout_list); | |
922 | ||
923 | spin_lock(&clp->cl_lock); | |
924 | rcu_read_lock(); | |
925 | restart: | |
926 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
927 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
928 | server, | |
929 | &layout_list) != 0) | |
930 | goto restart; | |
974cec8c | 931 | } |
fd9a8d71 TM |
932 | rcu_read_unlock(); |
933 | spin_unlock(&clp->cl_lock); | |
934 | ||
935 | if (list_empty(&layout_list)) | |
936 | return 0; | |
937 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
938 | } | |
939 | ||
940 | /* | |
9f266451 | 941 | * Called by the state manager to remove all layouts established under an |
fd9a8d71 TM |
942 | * expired lease. |
943 | */ | |
944 | void | |
945 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
946 | { | |
947 | nfs4_deviceid_mark_client_invalid(clp); | |
948 | nfs4_deviceid_purge_client(clp); | |
949 | ||
950 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
951 | } |
952 | ||
59b56394 TM |
953 | static void |
954 | pnfs_set_layout_cred(struct pnfs_layout_hdr *lo, const struct cred *cred) | |
955 | { | |
956 | const struct cred *old; | |
957 | ||
958 | if (cred && cred_fscmp(lo->plh_lc_cred, cred) != 0) { | |
959 | old = xchg(&lo->plh_lc_cred, get_cred(cred)); | |
960 | put_cred(old); | |
961 | } | |
962 | } | |
963 | ||
fd6002e9 | 964 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
965 | void |
966 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
59b56394 | 967 | const struct cred *cred, bool update_barrier) |
b1f69b75 | 968 | { |
aa95edf3 TM |
969 | u32 oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
970 | u32 newseq = be32_to_cpu(new->seqid); | |
2a59a041 TM |
971 | |
972 | if (!pnfs_layout_is_valid(lo)) { | |
59b56394 | 973 | pnfs_set_layout_cred(lo, cred); |
2a59a041 TM |
974 | nfs4_stateid_copy(&lo->plh_stateid, new); |
975 | lo->plh_barrier = newseq; | |
976 | pnfs_clear_layoutreturn_info(lo); | |
977 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
978 | return; | |
979 | } | |
aa95edf3 TM |
980 | |
981 | if (pnfs_seqid_is_newer(newseq, oldseq)) | |
f597c537 | 982 | nfs4_stateid_copy(&lo->plh_stateid, new); |
aa95edf3 TM |
983 | |
984 | if (update_barrier) { | |
985 | pnfs_barrier_update(lo, newseq); | |
ecebb80b | 986 | return; |
aa95edf3 TM |
987 | } |
988 | /* | |
989 | * Because of wraparound, we want to keep the barrier | |
990 | * "close" to the current seqids. We really only want to | |
991 | * get here from a layoutget call. | |
992 | */ | |
993 | if (atomic_read(&lo->plh_outstanding) == 1) | |
994 | pnfs_barrier_update(lo, be32_to_cpu(lo->plh_stateid.seqid)); | |
b1f69b75 AA |
995 | } |
996 | ||
cf7d63f1 | 997 | static bool |
19c54aba TM |
998 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
999 | const nfs4_stateid *stateid) | |
43f1b3da | 1000 | { |
19c54aba | 1001 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 1002 | |
d29b468d | 1003 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier) && lo->plh_barrier; |
19c54aba TM |
1004 | } |
1005 | ||
1006 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
1007 | static bool | |
e1c06f80 | 1008 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo) |
19c54aba | 1009 | { |
f7e8917a | 1010 | return lo->plh_block_lgets || |
e1c06f80 | 1011 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
cf7d63f1 FI |
1012 | } |
1013 | ||
5e36e2a9 FI |
1014 | static struct nfs_server * |
1015 | pnfs_find_server(struct inode *inode, struct nfs_open_context *ctx) | |
1016 | { | |
1017 | struct nfs_server *server; | |
1018 | ||
78746a38 | 1019 | if (inode) { |
5e36e2a9 | 1020 | server = NFS_SERVER(inode); |
78746a38 | 1021 | } else { |
5e36e2a9 FI |
1022 | struct dentry *parent_dir = dget_parent(ctx->dentry); |
1023 | server = NFS_SERVER(parent_dir->d_inode); | |
1024 | dput(parent_dir); | |
1025 | } | |
1026 | return server; | |
1027 | } | |
1028 | ||
29a8bfe5 TM |
1029 | static void nfs4_free_pages(struct page **pages, size_t size) |
1030 | { | |
1031 | int i; | |
1032 | ||
1033 | if (!pages) | |
1034 | return; | |
1035 | ||
1036 | for (i = 0; i < size; i++) { | |
1037 | if (!pages[i]) | |
1038 | break; | |
1039 | __free_page(pages[i]); | |
1040 | } | |
1041 | kfree(pages); | |
1042 | } | |
1043 | ||
1044 | static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) | |
1045 | { | |
1046 | struct page **pages; | |
1047 | int i; | |
1048 | ||
a2791d3a | 1049 | pages = kmalloc_array(size, sizeof(struct page *), gfp_flags); |
29a8bfe5 TM |
1050 | if (!pages) { |
1051 | dprintk("%s: can't alloc array of %zu pages\n", __func__, size); | |
1052 | return NULL; | |
1053 | } | |
1054 | ||
1055 | for (i = 0; i < size; i++) { | |
1056 | pages[i] = alloc_page(gfp_flags); | |
1057 | if (!pages[i]) { | |
1058 | dprintk("%s: failed to allocate page\n", __func__); | |
a2791d3a | 1059 | nfs4_free_pages(pages, i); |
29a8bfe5 TM |
1060 | return NULL; |
1061 | } | |
1062 | } | |
1063 | ||
1064 | return pages; | |
1065 | } | |
1066 | ||
587f03de | 1067 | static struct nfs4_layoutget * |
5e36e2a9 | 1068 | pnfs_alloc_init_layoutget_args(struct inode *ino, |
e5e94017 | 1069 | struct nfs_open_context *ctx, |
2409a976 | 1070 | const nfs4_stateid *stateid, |
e144e539 | 1071 | const struct pnfs_layout_range *range, |
587f03de | 1072 | gfp_t gfp_flags) |
e5e94017 | 1073 | { |
5e36e2a9 | 1074 | struct nfs_server *server = pnfs_find_server(ino, ctx); |
28ced9a8 | 1075 | size_t max_reply_sz = server->pnfs_curr_ld->max_layoutget_response; |
dacb452d | 1076 | size_t max_pages = max_response_pages(server); |
b1f69b75 | 1077 | struct nfs4_layoutget *lgp; |
b1f69b75 AA |
1078 | |
1079 | dprintk("--> %s\n", __func__); | |
e5e94017 | 1080 | |
83026d80 JL |
1081 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
1082 | if (lgp == NULL) | |
587f03de | 1083 | return NULL; |
83026d80 | 1084 | |
28ced9a8 TM |
1085 | if (max_reply_sz) { |
1086 | size_t npages = (max_reply_sz + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1087 | if (npages < max_pages) | |
1088 | max_pages = npages; | |
1089 | } | |
1090 | ||
dacb452d FI |
1091 | lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); |
1092 | if (!lgp->args.layout.pages) { | |
1093 | kfree(lgp); | |
1094 | return NULL; | |
1095 | } | |
1096 | lgp->args.layout.pglen = max_pages * PAGE_SIZE; | |
1097 | lgp->res.layoutp = &lgp->args.layout; | |
1098 | ||
d49e0d5b TM |
1099 | /* Don't confuse uninitialised result and success */ |
1100 | lgp->res.status = -NFS4ERR_DELAY; | |
83026d80 JL |
1101 | |
1102 | lgp->args.minlength = PAGE_SIZE; | |
1103 | if (lgp->args.minlength > range->length) | |
1104 | lgp->args.minlength = range->length; | |
5e36e2a9 FI |
1105 | if (ino) { |
1106 | loff_t i_size = i_size_read(ino); | |
1107 | ||
1108 | if (range->iomode == IOMODE_READ) { | |
1109 | if (range->offset >= i_size) | |
1110 | lgp->args.minlength = 0; | |
1111 | else if (i_size - range->offset < lgp->args.minlength) | |
1112 | lgp->args.minlength = i_size - range->offset; | |
1113 | } | |
d03ab29d | 1114 | } |
83026d80 JL |
1115 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
1116 | pnfs_copy_range(&lgp->args.range, range); | |
1117 | lgp->args.type = server->pnfs_curr_ld->id; | |
1118 | lgp->args.inode = ino; | |
1119 | lgp->args.ctx = get_nfs_open_context(ctx); | |
183d9e7b | 1120 | nfs4_stateid_copy(&lgp->args.stateid, stateid); |
83026d80 | 1121 | lgp->gfp_flags = gfp_flags; |
63ec2b69 | 1122 | lgp->cred = ctx->cred; |
587f03de | 1123 | return lgp; |
974cec8c AA |
1124 | } |
1125 | ||
29a8bfe5 TM |
1126 | void pnfs_layoutget_free(struct nfs4_layoutget *lgp) |
1127 | { | |
1128 | size_t max_pages = lgp->args.layout.pglen / PAGE_SIZE; | |
1129 | ||
1130 | nfs4_free_pages(lgp->args.layout.pages, max_pages); | |
b4e89bcb | 1131 | pnfs_put_layout_hdr(lgp->lo); |
29a8bfe5 TM |
1132 | put_nfs_open_context(lgp->args.ctx); |
1133 | kfree(lgp); | |
1134 | } | |
1135 | ||
24956804 TM |
1136 | static void pnfs_clear_layoutcommit(struct inode *inode, |
1137 | struct list_head *head) | |
1138 | { | |
1139 | struct nfs_inode *nfsi = NFS_I(inode); | |
1140 | struct pnfs_layout_segment *lseg, *tmp; | |
1141 | ||
1142 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
1143 | return; | |
1144 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
1145 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
1146 | continue; | |
1147 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
1148 | } | |
1149 | } | |
1150 | ||
68f74479 | 1151 | void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, |
2a974425 | 1152 | const nfs4_stateid *arg_stateid, |
68f74479 | 1153 | const struct pnfs_layout_range *range, |
68f74479 TM |
1154 | const nfs4_stateid *stateid) |
1155 | { | |
1156 | struct inode *inode = lo->plh_inode; | |
1157 | LIST_HEAD(freeme); | |
1158 | ||
1159 | spin_lock(&inode->i_lock); | |
c18d1e17 | 1160 | if (!pnfs_layout_is_valid(lo) || |
2a974425 TM |
1161 | !nfs4_stateid_match_other(&lo->plh_stateid, arg_stateid)) |
1162 | goto out_unlock; | |
68f74479 | 1163 | if (stateid) { |
2a974425 TM |
1164 | u32 seq = be32_to_cpu(arg_stateid->seqid); |
1165 | ||
68f74479 TM |
1166 | pnfs_mark_matching_lsegs_invalid(lo, &freeme, range, seq); |
1167 | pnfs_free_returned_lsegs(lo, &freeme, range, seq); | |
59b56394 | 1168 | pnfs_set_layout_stateid(lo, stateid, NULL, true); |
68f74479 TM |
1169 | } else |
1170 | pnfs_mark_layout_stateid_invalid(lo, &freeme); | |
2a974425 | 1171 | out_unlock: |
68f74479 TM |
1172 | pnfs_clear_layoutreturn_waitbit(lo); |
1173 | spin_unlock(&inode->i_lock); | |
1174 | pnfs_free_lseg_list(&freeme); | |
1175 | ||
1176 | } | |
1177 | ||
13c13a6a | 1178 | static bool |
e5fd1904 TM |
1179 | pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo, |
1180 | nfs4_stateid *stateid, | |
44ea8dfc | 1181 | const struct cred **cred, |
e5fd1904 | 1182 | enum pnfs_iomode *iomode) |
13c13a6a | 1183 | { |
bf0291dd TM |
1184 | /* Serialise LAYOUTGET/LAYOUTRETURN */ |
1185 | if (atomic_read(&lo->plh_outstanding) != 0) | |
1186 | return false; | |
6604b203 | 1187 | if (test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) |
13c13a6a | 1188 | return false; |
6604b203 | 1189 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); |
13c13a6a | 1190 | pnfs_get_layout_hdr(lo); |
1bcf34fd TM |
1191 | nfs4_stateid_copy(stateid, &lo->plh_stateid); |
1192 | *cred = get_cred(lo->plh_lc_cred); | |
e5fd1904 | 1193 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) { |
44ea8dfc TM |
1194 | if (lo->plh_return_seq != 0) |
1195 | stateid->seqid = cpu_to_be32(lo->plh_return_seq); | |
e5fd1904 TM |
1196 | if (iomode != NULL) |
1197 | *iomode = lo->plh_return_iomode; | |
1198 | pnfs_clear_layoutreturn_info(lo); | |
1bcf34fd | 1199 | } else if (iomode != NULL) |
e5fd1904 | 1200 | *iomode = IOMODE_ANY; |
1bcf34fd | 1201 | pnfs_barrier_update(lo, be32_to_cpu(stateid->seqid)); |
13c13a6a TM |
1202 | return true; |
1203 | } | |
1204 | ||
828ed9ec TM |
1205 | static void |
1206 | pnfs_init_layoutreturn_args(struct nfs4_layoutreturn_args *args, | |
1207 | struct pnfs_layout_hdr *lo, | |
1208 | const nfs4_stateid *stateid, | |
1209 | enum pnfs_iomode iomode) | |
1210 | { | |
1211 | struct inode *inode = lo->plh_inode; | |
1212 | ||
1213 | args->layout_type = NFS_SERVER(inode)->pnfs_curr_ld->id; | |
1214 | args->inode = inode; | |
1215 | args->range.iomode = iomode; | |
1216 | args->range.offset = 0; | |
1217 | args->range.length = NFS4_MAX_UINT64; | |
1218 | args->layout = lo; | |
1219 | nfs4_stateid_copy(&args->stateid, stateid); | |
1220 | } | |
1221 | ||
f40eb5d0 | 1222 | static int |
44ea8dfc TM |
1223 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, |
1224 | const nfs4_stateid *stateid, | |
1225 | const struct cred **pcred, | |
1226 | enum pnfs_iomode iomode, | |
1227 | bool sync) | |
f40eb5d0 PT |
1228 | { |
1229 | struct inode *ino = lo->plh_inode; | |
287bd3e9 | 1230 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; |
f40eb5d0 | 1231 | struct nfs4_layoutreturn *lrp; |
44ea8dfc | 1232 | const struct cred *cred = *pcred; |
f40eb5d0 PT |
1233 | int status = 0; |
1234 | ||
44ea8dfc | 1235 | *pcred = NULL; |
e4af440a | 1236 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
1237 | if (unlikely(lrp == NULL)) { |
1238 | status = -ENOMEM; | |
1239 | spin_lock(&ino->i_lock); | |
d67ae825 | 1240 | pnfs_clear_layoutreturn_waitbit(lo); |
f40eb5d0 | 1241 | spin_unlock(&ino->i_lock); |
44ea8dfc | 1242 | put_cred(cred); |
f40eb5d0 PT |
1243 | pnfs_put_layout_hdr(lo); |
1244 | goto out; | |
1245 | } | |
1246 | ||
828ed9ec | 1247 | pnfs_init_layoutreturn_args(&lrp->args, lo, stateid, iomode); |
4d796d75 | 1248 | lrp->args.ld_private = &lrp->ld_private; |
f40eb5d0 | 1249 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
44ea8dfc | 1250 | lrp->cred = cred; |
287bd3e9 TM |
1251 | if (ld->prepare_layoutreturn) |
1252 | ld->prepare_layoutreturn(&lrp->args); | |
f40eb5d0 | 1253 | |
6c16605d | 1254 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
1255 | out: |
1256 | dprintk("<-- %s status: %d\n", __func__, status); | |
1257 | return status; | |
1258 | } | |
1259 | ||
d474f961 TM |
1260 | static bool |
1261 | pnfs_layout_segments_returnable(struct pnfs_layout_hdr *lo, | |
1262 | enum pnfs_iomode iomode, | |
1263 | u32 seq) | |
1264 | { | |
1265 | struct pnfs_layout_range recall_range = { | |
1266 | .length = NFS4_MAX_UINT64, | |
1267 | .iomode = iomode, | |
1268 | }; | |
1269 | return pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs, | |
1270 | &recall_range, seq) != -EBUSY; | |
1271 | } | |
1272 | ||
13c13a6a TM |
1273 | /* Return true if layoutreturn is needed */ |
1274 | static bool | |
1275 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo) | |
1276 | { | |
2370abda | 1277 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a | 1278 | return false; |
d474f961 TM |
1279 | return pnfs_layout_segments_returnable(lo, lo->plh_return_iomode, |
1280 | lo->plh_return_seq); | |
13c13a6a TM |
1281 | } |
1282 | ||
1283 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo) | |
1284 | { | |
1285 | struct inode *inode= lo->plh_inode; | |
1286 | ||
2370abda | 1287 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
1288 | return; |
1289 | spin_lock(&inode->i_lock); | |
1290 | if (pnfs_layout_need_return(lo)) { | |
44ea8dfc | 1291 | const struct cred *cred; |
13c13a6a TM |
1292 | nfs4_stateid stateid; |
1293 | enum pnfs_iomode iomode; | |
1294 | bool send; | |
1295 | ||
44ea8dfc | 1296 | send = pnfs_prepare_layoutreturn(lo, &stateid, &cred, &iomode); |
13c13a6a TM |
1297 | spin_unlock(&inode->i_lock); |
1298 | if (send) { | |
1299 | /* Send an async layoutreturn so we dont deadlock */ | |
44ea8dfc | 1300 | pnfs_send_layoutreturn(lo, &stateid, &cred, iomode, false); |
13c13a6a TM |
1301 | } |
1302 | } else | |
1303 | spin_unlock(&inode->i_lock); | |
1304 | } | |
1305 | ||
293b3b06 AA |
1306 | /* |
1307 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
1308 | * when the layout segment list is empty. | |
1309 | * | |
1310 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
1311 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
1312 | * deviceid is marked invalid. | |
1313 | */ | |
cbe82603 BH |
1314 | int |
1315 | _pnfs_return_layout(struct inode *ino) | |
1316 | { | |
1317 | struct pnfs_layout_hdr *lo = NULL; | |
1318 | struct nfs_inode *nfsi = NFS_I(ino); | |
a421d218 AS |
1319 | struct pnfs_layout_range range = { |
1320 | .iomode = IOMODE_ANY, | |
1321 | .offset = 0, | |
1322 | .length = NFS4_MAX_UINT64, | |
1323 | }; | |
cbe82603 | 1324 | LIST_HEAD(tmp_list); |
44ea8dfc | 1325 | const struct cred *cred; |
cbe82603 | 1326 | nfs4_stateid stateid; |
24408f52 | 1327 | int status = 0; |
93b7f7ad | 1328 | bool send, valid_layout; |
cbe82603 | 1329 | |
366d5052 | 1330 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
1331 | |
1332 | spin_lock(&ino->i_lock); | |
1333 | lo = nfsi->layout; | |
e5929f3c | 1334 | if (!lo) { |
cbe82603 | 1335 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
1336 | dprintk("NFS: %s no layout to return\n", __func__); |
1337 | goto out; | |
cbe82603 | 1338 | } |
cbe82603 | 1339 | /* Reference matched in nfs4_layoutreturn_release */ |
70c3bd2b | 1340 | pnfs_get_layout_hdr(lo); |
24408f52 TM |
1341 | /* Is there an outstanding layoutreturn ? */ |
1342 | if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) { | |
1343 | spin_unlock(&ino->i_lock); | |
1344 | if (wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
1345 | TASK_UNINTERRUPTIBLE)) | |
1346 | goto out_put_layout_hdr; | |
1347 | spin_lock(&ino->i_lock); | |
1348 | } | |
93b7f7ad | 1349 | valid_layout = pnfs_layout_is_valid(lo); |
24956804 | 1350 | pnfs_clear_layoutcommit(ino, &tmp_list); |
a421d218 AS |
1351 | pnfs_mark_matching_lsegs_return(lo, &tmp_list, &range, 0); |
1352 | ||
1353 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) | |
c88953d8 | 1354 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); |
c88953d8 | 1355 | |
293b3b06 | 1356 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
93b7f7ad OK |
1357 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) || |
1358 | !valid_layout) { | |
293b3b06 | 1359 | spin_unlock(&ino->i_lock); |
293b3b06 | 1360 | dprintk("NFS: %s no layout segments to return\n", __func__); |
7bcc1058 | 1361 | goto out_wait_layoutreturn; |
293b3b06 | 1362 | } |
47abadef | 1363 | |
44ea8dfc | 1364 | send = pnfs_prepare_layoutreturn(lo, &stateid, &cred, NULL); |
cbe82603 | 1365 | spin_unlock(&ino->i_lock); |
7f27392c | 1366 | if (send) |
44ea8dfc | 1367 | status = pnfs_send_layoutreturn(lo, &stateid, &cred, IOMODE_ANY, true); |
7bcc1058 TM |
1368 | out_wait_layoutreturn: |
1369 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, TASK_UNINTERRUPTIBLE); | |
7f27392c | 1370 | out_put_layout_hdr: |
ee6625a9 | 1371 | pnfs_free_lseg_list(&tmp_list); |
7f27392c | 1372 | pnfs_put_layout_hdr(lo); |
cbe82603 BH |
1373 | out: |
1374 | dprintk("<-- %s status: %d\n", __func__, status); | |
1375 | return status; | |
1376 | } | |
1377 | ||
24028672 TM |
1378 | int |
1379 | pnfs_commit_and_return_layout(struct inode *inode) | |
1380 | { | |
1381 | struct pnfs_layout_hdr *lo; | |
1382 | int ret; | |
1383 | ||
1384 | spin_lock(&inode->i_lock); | |
1385 | lo = NFS_I(inode)->layout; | |
1386 | if (lo == NULL) { | |
1387 | spin_unlock(&inode->i_lock); | |
1388 | return 0; | |
1389 | } | |
1390 | pnfs_get_layout_hdr(lo); | |
1391 | /* Block new layoutgets and read/write to ds */ | |
1392 | lo->plh_block_lgets++; | |
1393 | spin_unlock(&inode->i_lock); | |
1394 | filemap_fdatawait(inode->i_mapping); | |
1395 | ret = pnfs_layoutcommit_inode(inode, true); | |
1396 | if (ret == 0) | |
1397 | ret = _pnfs_return_layout(inode); | |
1398 | spin_lock(&inode->i_lock); | |
1399 | lo->plh_block_lgets--; | |
1400 | spin_unlock(&inode->i_lock); | |
1401 | pnfs_put_layout_hdr(lo); | |
1402 | return ret; | |
1403 | } | |
1404 | ||
1c5bd76d TM |
1405 | bool pnfs_roc(struct inode *ino, |
1406 | struct nfs4_layoutreturn_args *args, | |
1407 | struct nfs4_layoutreturn_res *res, | |
a52458b4 | 1408 | const struct cred *cred) |
f7e8917a | 1409 | { |
40dd4b7a TM |
1410 | struct nfs_inode *nfsi = NFS_I(ino); |
1411 | struct nfs_open_context *ctx; | |
1412 | struct nfs4_state *state; | |
f7e8917a | 1413 | struct pnfs_layout_hdr *lo; |
1c5bd76d | 1414 | struct pnfs_layout_segment *lseg, *next; |
44ea8dfc | 1415 | const struct cred *lc_cred; |
193e3aa2 | 1416 | nfs4_stateid stateid; |
1c5bd76d TM |
1417 | enum pnfs_iomode iomode = 0; |
1418 | bool layoutreturn = false, roc = false; | |
e71708d4 | 1419 | bool skip_read = false; |
f7e8917a | 1420 | |
1c5bd76d TM |
1421 | if (!nfs_have_layout(ino)) |
1422 | return false; | |
29ade5db | 1423 | retry: |
0de43976 | 1424 | rcu_read_lock(); |
f7e8917a | 1425 | spin_lock(&ino->i_lock); |
40dd4b7a | 1426 | lo = nfsi->layout; |
0cdc329e | 1427 | if (!lo || !pnfs_layout_is_valid(lo) || |
9c6376eb TM |
1428 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
1429 | lo = NULL; | |
40dd4b7a | 1430 | goto out_noroc; |
9c6376eb TM |
1431 | } |
1432 | pnfs_get_layout_hdr(lo); | |
29ade5db | 1433 | if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) { |
29ade5db | 1434 | spin_unlock(&ino->i_lock); |
0de43976 | 1435 | rcu_read_unlock(); |
29ade5db TM |
1436 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, |
1437 | TASK_UNINTERRUPTIBLE); | |
1438 | pnfs_put_layout_hdr(lo); | |
1439 | goto retry; | |
1440 | } | |
40dd4b7a | 1441 | |
e755d638 | 1442 | /* no roc if we hold a delegation */ |
e71708d4 TM |
1443 | if (nfs4_check_delegation(ino, FMODE_READ)) { |
1444 | if (nfs4_check_delegation(ino, FMODE_WRITE)) | |
1445 | goto out_noroc; | |
1446 | skip_read = true; | |
1447 | } | |
40dd4b7a | 1448 | |
0de43976 | 1449 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { |
40dd4b7a | 1450 | state = ctx->state; |
e71708d4 TM |
1451 | if (state == NULL) |
1452 | continue; | |
40dd4b7a | 1453 | /* Don't return layout if there is open file state */ |
e71708d4 | 1454 | if (state->state & FMODE_WRITE) |
40dd4b7a | 1455 | goto out_noroc; |
e71708d4 TM |
1456 | if (state->state & FMODE_READ) |
1457 | skip_read = true; | |
40dd4b7a TM |
1458 | } |
1459 | ||
e755d638 | 1460 | |
1c5bd76d | 1461 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) { |
e71708d4 TM |
1462 | if (skip_read && lseg->pls_range.iomode == IOMODE_READ) |
1463 | continue; | |
e755d638 | 1464 | /* If we are sending layoutreturn, invalidate all valid lsegs */ |
1c5bd76d TM |
1465 | if (!test_and_clear_bit(NFS_LSEG_ROC, &lseg->pls_flags)) |
1466 | continue; | |
1467 | /* | |
1468 | * Note: mark lseg for return so pnfs_layout_remove_lseg | |
1469 | * doesn't invalidate the layout for us. | |
1470 | */ | |
1471 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
1472 | if (!mark_lseg_invalid(lseg, &lo->plh_return_segs)) | |
1473 | continue; | |
1474 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); | |
69820d22 TM |
1475 | } |
1476 | ||
1c5bd76d TM |
1477 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
1478 | goto out_noroc; | |
69820d22 | 1479 | |
500d701f | 1480 | /* ROC in two conditions: |
e755d638 PT |
1481 | * 1. there are ROC lsegs |
1482 | * 2. we don't send layoutreturn | |
e755d638 | 1483 | */ |
1c5bd76d | 1484 | /* lo ref dropped in pnfs_roc_release() */ |
44ea8dfc | 1485 | layoutreturn = pnfs_prepare_layoutreturn(lo, &stateid, &lc_cred, &iomode); |
1c5bd76d | 1486 | /* If the creds don't match, we can't compound the layoutreturn */ |
4d8948c7 | 1487 | if (!layoutreturn || cred_fscmp(cred, lc_cred) != 0) |
1c5bd76d TM |
1488 | goto out_noroc; |
1489 | ||
1490 | roc = layoutreturn; | |
1491 | pnfs_init_layoutreturn_args(args, lo, &stateid, iomode); | |
1492 | res->lrs_present = 0; | |
1493 | layoutreturn = false; | |
44ea8dfc | 1494 | put_cred(lc_cred); |
4d8948c7 | 1495 | |
40dd4b7a | 1496 | out_noroc: |
f7e8917a | 1497 | spin_unlock(&ino->i_lock); |
0de43976 | 1498 | rcu_read_unlock(); |
e755d638 | 1499 | pnfs_layoutcommit_inode(ino, true); |
287bd3e9 TM |
1500 | if (roc) { |
1501 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
1502 | if (ld->prepare_layoutreturn) | |
1503 | ld->prepare_layoutreturn(args); | |
9c6376eb | 1504 | pnfs_put_layout_hdr(lo); |
287bd3e9 TM |
1505 | return true; |
1506 | } | |
e755d638 | 1507 | if (layoutreturn) |
44ea8dfc | 1508 | pnfs_send_layoutreturn(lo, &stateid, &lc_cred, iomode, true); |
9c6376eb | 1509 | pnfs_put_layout_hdr(lo); |
287bd3e9 | 1510 | return false; |
f7e8917a FI |
1511 | } |
1512 | ||
078000d0 TM |
1513 | int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, |
1514 | struct nfs4_layoutreturn_res **respp, int *ret) | |
287a9c55 TM |
1515 | { |
1516 | struct nfs4_layoutreturn_args *arg = *argpp; | |
1517 | int retval = -EAGAIN; | |
1518 | ||
1519 | if (!arg) | |
1520 | return 0; | |
1521 | /* Handle Layoutreturn errors */ | |
1522 | switch (*ret) { | |
1523 | case 0: | |
1524 | retval = 0; | |
1525 | break; | |
6109bcf7 TM |
1526 | case -NFS4ERR_NOMATCHING_LAYOUT: |
1527 | /* Was there an RPC level error? If not, retry */ | |
1528 | if (task->tk_rpc_status == 0) | |
1529 | break; | |
1530 | /* If the call was not sent, let caller handle it */ | |
1531 | if (!RPC_WAS_SENT(task)) | |
1532 | return 0; | |
1533 | /* | |
1534 | * Otherwise, assume the call succeeded and | |
1535 | * that we need to release the layout | |
1536 | */ | |
1537 | *ret = 0; | |
1538 | (*respp)->lrs_present = 0; | |
1539 | retval = 0; | |
1540 | break; | |
078a432d TM |
1541 | case -NFS4ERR_DELAY: |
1542 | /* Let the caller handle the retry */ | |
1543 | *ret = -NFS4ERR_NOMATCHING_LAYOUT; | |
1544 | return 0; | |
287a9c55 | 1545 | case -NFS4ERR_OLD_STATEID: |
30cb3ee2 | 1546 | if (!nfs4_layout_refresh_old_stateid(&arg->stateid, |
078000d0 | 1547 | &arg->range, arg->inode)) |
287a9c55 TM |
1548 | break; |
1549 | *ret = -NFS4ERR_NOMATCHING_LAYOUT; | |
1550 | return -EAGAIN; | |
1551 | } | |
1552 | *argpp = NULL; | |
1553 | *respp = NULL; | |
1554 | return retval; | |
1555 | } | |
1556 | ||
1c5bd76d TM |
1557 | void pnfs_roc_release(struct nfs4_layoutreturn_args *args, |
1558 | struct nfs4_layoutreturn_res *res, | |
1559 | int ret) | |
f7e8917a | 1560 | { |
1c5bd76d | 1561 | struct pnfs_layout_hdr *lo = args->layout; |
67bbceed | 1562 | struct inode *inode = args->inode; |
1c5bd76d | 1563 | const nfs4_stateid *res_stateid = NULL; |
287bd3e9 | 1564 | struct nfs4_xdr_opaque_data *ld_private = args->ld_private; |
f7e8917a | 1565 | |
9c47b18c TM |
1566 | switch (ret) { |
1567 | case -NFS4ERR_NOMATCHING_LAYOUT: | |
67bbceed TM |
1568 | spin_lock(&inode->i_lock); |
1569 | if (pnfs_layout_is_valid(lo) && | |
1570 | nfs4_stateid_match_other(&args->stateid, &lo->plh_stateid)) | |
1571 | pnfs_set_plh_return_info(lo, args->range.iomode, 0); | |
c18d1e17 | 1572 | pnfs_clear_layoutreturn_waitbit(lo); |
67bbceed | 1573 | spin_unlock(&inode->i_lock); |
9c47b18c TM |
1574 | break; |
1575 | case 0: | |
1c5bd76d TM |
1576 | if (res->lrs_present) |
1577 | res_stateid = &res->stateid; | |
df561f66 | 1578 | fallthrough; |
9c47b18c | 1579 | default: |
c18d1e17 TM |
1580 | pnfs_layoutreturn_free_lsegs(lo, &args->stateid, &args->range, |
1581 | res_stateid); | |
1c5bd76d | 1582 | } |
a19b4785 | 1583 | trace_nfs4_layoutreturn_on_close(args->inode, &args->stateid, ret); |
287bd3e9 TM |
1584 | if (ld_private && ld_private->ops && ld_private->ops->free) |
1585 | ld_private->ops->free(ld_private); | |
1c5bd76d | 1586 | pnfs_put_layout_hdr(lo); |
f7e8917a FI |
1587 | } |
1588 | ||
500d701f PT |
1589 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
1590 | { | |
1591 | struct nfs_inode *nfsi = NFS_I(ino); | |
1592 | struct pnfs_layout_hdr *lo; | |
1593 | bool sleep = false; | |
1594 | ||
1595 | /* we might not have grabbed lo reference. so need to check under | |
1596 | * i_lock */ | |
1597 | spin_lock(&ino->i_lock); | |
1598 | lo = nfsi->layout; | |
ee284e35 TM |
1599 | if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
1600 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
500d701f | 1601 | sleep = true; |
ee284e35 | 1602 | } |
500d701f | 1603 | spin_unlock(&ino->i_lock); |
500d701f PT |
1604 | return sleep; |
1605 | } | |
1606 | ||
b1f69b75 AA |
1607 | /* |
1608 | * Compare two layout segments for sorting into layout cache. | |
1609 | * We want to preferentially return RW over RO layouts, so ensure those | |
1610 | * are seen first. | |
1611 | */ | |
1612 | static s64 | |
7dc0ac70 | 1613 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1614 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1615 | { |
fb3296eb BH |
1616 | s64 d; |
1617 | ||
1618 | /* high offset > low offset */ | |
1619 | d = l1->offset - l2->offset; | |
1620 | if (d) | |
1621 | return d; | |
1622 | ||
1623 | /* short length > long length */ | |
1624 | d = l2->length - l1->length; | |
1625 | if (d) | |
1626 | return d; | |
1627 | ||
b1f69b75 | 1628 | /* read > read/write */ |
fb3296eb | 1629 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1630 | } |
1631 | ||
03772d2f TM |
1632 | static bool |
1633 | pnfs_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
1634 | const struct pnfs_layout_range *l2) | |
1635 | { | |
1636 | return pnfs_lseg_range_cmp(l1, l2) > 0; | |
1637 | } | |
1638 | ||
1639 | static bool | |
1640 | pnfs_lseg_no_merge(struct pnfs_layout_segment *lseg, | |
1641 | struct pnfs_layout_segment *old) | |
1642 | { | |
1643 | return false; | |
1644 | } | |
1645 | ||
1646 | void | |
1647 | pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1648 | struct pnfs_layout_segment *lseg, | |
1649 | bool (*is_after)(const struct pnfs_layout_range *, | |
1650 | const struct pnfs_layout_range *), | |
1651 | bool (*do_merge)(struct pnfs_layout_segment *, | |
1652 | struct pnfs_layout_segment *), | |
1653 | struct list_head *free_me) | |
974cec8c | 1654 | { |
03772d2f | 1655 | struct pnfs_layout_segment *lp, *tmp; |
b1f69b75 | 1656 | |
974cec8c AA |
1657 | dprintk("%s:Begin\n", __func__); |
1658 | ||
03772d2f TM |
1659 | list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) { |
1660 | if (test_bit(NFS_LSEG_VALID, &lp->pls_flags) == 0) | |
1661 | continue; | |
1662 | if (do_merge(lseg, lp)) { | |
1663 | mark_lseg_invalid(lp, free_me); | |
1664 | continue; | |
1665 | } | |
1666 | if (is_after(&lseg->pls_range, &lp->pls_range)) | |
b1f69b75 | 1667 | continue; |
566052c5 | 1668 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1669 | dprintk("%s: inserted lseg %p " |
1670 | "iomode %d offset %llu length %llu before " | |
1671 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1672 | __func__, lseg, lseg->pls_range.iomode, |
1673 | lseg->pls_range.offset, lseg->pls_range.length, | |
1674 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1675 | lp->pls_range.length); | |
fb3296eb | 1676 | goto out; |
974cec8c | 1677 | } |
fb3296eb BH |
1678 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1679 | dprintk("%s: inserted lseg %p " | |
1680 | "iomode %d offset %llu length %llu at tail\n", | |
1681 | __func__, lseg, lseg->pls_range.iomode, | |
1682 | lseg->pls_range.offset, lseg->pls_range.length); | |
1683 | out: | |
70c3bd2b | 1684 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1685 | |
1686 | dprintk("%s:Return\n", __func__); | |
e5e94017 | 1687 | } |
03772d2f TM |
1688 | EXPORT_SYMBOL_GPL(pnfs_generic_layout_insert_lseg); |
1689 | ||
1690 | static void | |
1691 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1692 | struct pnfs_layout_segment *lseg, | |
1693 | struct list_head *free_me) | |
1694 | { | |
1695 | struct inode *inode = lo->plh_inode; | |
1696 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
1697 | ||
1698 | if (ld->add_lseg != NULL) | |
1699 | ld->add_lseg(lo, lseg, free_me); | |
1700 | else | |
1701 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
1702 | pnfs_lseg_range_is_after, | |
1703 | pnfs_lseg_no_merge, | |
1704 | free_me); | |
1705 | } | |
e5e94017 BH |
1706 | |
1707 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1708 | alloc_init_layout_hdr(struct inode *ino, |
1709 | struct nfs_open_context *ctx, | |
1710 | gfp_t gfp_flags) | |
e5e94017 BH |
1711 | { |
1712 | struct pnfs_layout_hdr *lo; | |
1713 | ||
636fb9c8 | 1714 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1715 | if (!lo) |
1716 | return NULL; | |
2b28a7be | 1717 | refcount_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1718 | INIT_LIST_HEAD(&lo->plh_layouts); |
1719 | INIT_LIST_HEAD(&lo->plh_segs); | |
68f74479 | 1720 | INIT_LIST_HEAD(&lo->plh_return_segs); |
fd9a8d71 | 1721 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1722 | lo->plh_inode = ino; |
a52458b4 | 1723 | lo->plh_lc_cred = get_cred(ctx->cred); |
67a3b721 | 1724 | lo->plh_flags |= 1 << NFS_LAYOUT_INVALID_STID; |
e5e94017 BH |
1725 | return lo; |
1726 | } | |
1727 | ||
1728 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1729 | pnfs_find_alloc_layout(struct inode *ino, |
1730 | struct nfs_open_context *ctx, | |
1731 | gfp_t gfp_flags) | |
e5241e43 TM |
1732 | __releases(&ino->i_lock) |
1733 | __acquires(&ino->i_lock) | |
e5e94017 BH |
1734 | { |
1735 | struct nfs_inode *nfsi = NFS_I(ino); | |
1736 | struct pnfs_layout_hdr *new = NULL; | |
1737 | ||
1738 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1739 | ||
251ec410 TM |
1740 | if (nfsi->layout != NULL) |
1741 | goto out_existing; | |
e5e94017 | 1742 | spin_unlock(&ino->i_lock); |
9fa40758 | 1743 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1744 | spin_lock(&ino->i_lock); |
1745 | ||
251ec410 | 1746 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1747 | nfsi->layout = new; |
251ec410 | 1748 | return new; |
7175fe90 YN |
1749 | } else if (new != NULL) |
1750 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1751 | out_existing: |
1752 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1753 | return nfsi->layout; |
1754 | } | |
1755 | ||
b1f69b75 AA |
1756 | /* |
1757 | * iomode matching rules: | |
c7d73af2 TH |
1758 | * iomode lseg strict match |
1759 | * iomode | |
1760 | * ----- ----- ------ ----- | |
1761 | * ANY READ N/A true | |
1762 | * ANY RW N/A true | |
1763 | * RW READ N/A false | |
1764 | * RW RW N/A true | |
1765 | * READ READ N/A true | |
1766 | * READ RW true false | |
1767 | * READ RW false true | |
b1f69b75 | 1768 | */ |
3cb2df17 | 1769 | static bool |
7dc0ac70 | 1770 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
c7d73af2 TH |
1771 | const struct pnfs_layout_range *range, |
1772 | bool strict_iomode) | |
b1f69b75 | 1773 | { |
fb3296eb BH |
1774 | struct pnfs_layout_range range1; |
1775 | ||
1776 | if ((range->iomode == IOMODE_RW && | |
1777 | ls_range->iomode != IOMODE_RW) || | |
c7d73af2 | 1778 | (range->iomode != ls_range->iomode && |
6089dd0d | 1779 | strict_iomode) || |
7dc0ac70 | 1780 | !pnfs_lseg_range_intersecting(ls_range, range)) |
10db5b7a | 1781 | return false; |
fb3296eb BH |
1782 | |
1783 | /* range1 covers only the first byte in the range */ | |
1784 | range1 = *range; | |
1785 | range1.length = 1; | |
7dc0ac70 | 1786 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1787 | } |
1788 | ||
1789 | /* | |
1790 | * lookup range in layout | |
1791 | */ | |
e5e94017 | 1792 | static struct pnfs_layout_segment * |
fb3296eb | 1793 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
c7d73af2 TH |
1794 | struct pnfs_layout_range *range, |
1795 | bool strict_iomode) | |
e5e94017 | 1796 | { |
b1f69b75 AA |
1797 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1798 | ||
1799 | dprintk("%s:Begin\n", __func__); | |
1800 | ||
b7edfaa1 | 1801 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1802 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
c7d73af2 TH |
1803 | pnfs_lseg_range_match(&lseg->pls_range, range, |
1804 | strict_iomode)) { | |
9369a431 | 1805 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1806 | break; |
1807 | } | |
b1f69b75 AA |
1808 | } |
1809 | ||
1810 | dprintk("%s:Return lseg %p ref %d\n", | |
eba6dd69 | 1811 | __func__, ret, ret ? refcount_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1812 | return ret; |
e5e94017 BH |
1813 | } |
1814 | ||
d23d61c8 AA |
1815 | /* |
1816 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1817 | * to the MDS or over pNFS | |
1818 | * | |
1819 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1820 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1821 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1822 | * WRITE request. | |
1823 | * | |
1824 | * A return of true means use MDS I/O. | |
1825 | * | |
1826 | * From rfc 5661: | |
1827 | * If a file's size is smaller than the file size threshold, data accesses | |
1828 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1829 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1830 | * server. If both file size and I/O size are provided, the client SHOULD | |
1831 | * reach or exceed both thresholds before sending its read or write | |
1832 | * requests to the data server. | |
1833 | */ | |
1834 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1835 | struct inode *ino, int iomode) | |
1836 | { | |
1837 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1838 | struct nfs_inode *nfsi = NFS_I(ino); | |
1839 | loff_t fsize = i_size_read(ino); | |
1840 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1841 | ||
1842 | if (t == NULL) | |
1843 | return ret; | |
1844 | ||
1845 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1846 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1847 | ||
1848 | switch (iomode) { | |
1849 | case IOMODE_READ: | |
1850 | if (t->bm & THRESHOLD_RD) { | |
1851 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1852 | size_set = true; | |
1853 | if (fsize < t->rd_sz) | |
1854 | size = true; | |
1855 | } | |
1856 | if (t->bm & THRESHOLD_RD_IO) { | |
1857 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1858 | nfsi->read_io); | |
1859 | io_set = true; | |
1860 | if (nfsi->read_io < t->rd_io_sz) | |
1861 | io = true; | |
1862 | } | |
1863 | break; | |
1864 | case IOMODE_RW: | |
1865 | if (t->bm & THRESHOLD_WR) { | |
1866 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1867 | size_set = true; | |
1868 | if (fsize < t->wr_sz) | |
1869 | size = true; | |
1870 | } | |
1871 | if (t->bm & THRESHOLD_WR_IO) { | |
1872 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1873 | nfsi->write_io); | |
1874 | io_set = true; | |
1875 | if (nfsi->write_io < t->wr_io_sz) | |
1876 | io = true; | |
1877 | } | |
1878 | break; | |
1879 | } | |
1880 | if (size_set && io_set) { | |
1881 | if (size && io) | |
1882 | ret = true; | |
1883 | } else if (size || io) | |
1884 | ret = true; | |
1885 | ||
1886 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1887 | return ret; | |
1888 | } | |
1889 | ||
d03360aa | 1890 | static int pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) |
aa8a45ee PT |
1891 | { |
1892 | /* | |
1893 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1894 | * reference | |
1895 | */ | |
1896 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
d03360aa | 1897 | return wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, |
2e5b29f0 | 1898 | nfs_wait_bit_killable, |
d03360aa | 1899 | TASK_KILLABLE); |
aa8a45ee PT |
1900 | } |
1901 | ||
411ae722 TM |
1902 | static void nfs_layoutget_begin(struct pnfs_layout_hdr *lo) |
1903 | { | |
1904 | atomic_inc(&lo->plh_outstanding); | |
1905 | } | |
1906 | ||
1907 | static void nfs_layoutget_end(struct pnfs_layout_hdr *lo) | |
1908 | { | |
1909 | if (atomic_dec_and_test(&lo->plh_outstanding)) | |
1910 | wake_up_var(&lo->plh_outstanding); | |
1911 | } | |
1912 | ||
d29b468d TM |
1913 | static bool pnfs_is_first_layoutget(struct pnfs_layout_hdr *lo) |
1914 | { | |
1915 | return test_bit(NFS_LAYOUT_FIRST_LAYOUTGET, &lo->plh_flags); | |
1916 | } | |
1917 | ||
d67ae825 TH |
1918 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1919 | { | |
1920 | unsigned long *bitlock = &lo->plh_flags; | |
1921 | ||
1922 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1923 | smp_mb__after_atomic(); | |
1924 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1925 | } | |
1926 | ||
78746a38 FI |
1927 | static void _add_to_server_list(struct pnfs_layout_hdr *lo, |
1928 | struct nfs_server *server) | |
1929 | { | |
cf6605d1 | 1930 | if (!test_and_set_bit(NFS_LAYOUT_HASHED, &lo->plh_flags)) { |
78746a38 FI |
1931 | struct nfs_client *clp = server->nfs_client; |
1932 | ||
1933 | /* The lo must be on the clp list if there is any | |
1934 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1935 | */ | |
1936 | spin_lock(&clp->cl_lock); | |
cf6605d1 | 1937 | list_add_tail_rcu(&lo->plh_layouts, &server->layouts); |
78746a38 FI |
1938 | spin_unlock(&clp->cl_lock); |
1939 | } | |
1940 | } | |
1941 | ||
e5e94017 BH |
1942 | /* |
1943 | * Layout segment is retreived from the server if not cached. | |
1944 | * The appropriate layout segment is referenced and returned to the caller. | |
1945 | */ | |
7c24d948 | 1946 | struct pnfs_layout_segment * |
e5e94017 BH |
1947 | pnfs_update_layout(struct inode *ino, |
1948 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1949 | loff_t pos, |
1950 | u64 count, | |
a75b9df9 | 1951 | enum pnfs_iomode iomode, |
c7d73af2 | 1952 | bool strict_iomode, |
a75b9df9 | 1953 | gfp_t gfp_flags) |
e5e94017 | 1954 | { |
fb3296eb BH |
1955 | struct pnfs_layout_range arg = { |
1956 | .iomode = iomode, | |
1957 | .offset = pos, | |
1958 | .length = count, | |
1959 | }; | |
70d2f7b1 | 1960 | unsigned pg_offset; |
6382a441 WAA |
1961 | struct nfs_server *server = NFS_SERVER(ino); |
1962 | struct nfs_client *clp = server->nfs_client; | |
183d9e7b | 1963 | struct pnfs_layout_hdr *lo = NULL; |
e5e94017 | 1964 | struct pnfs_layout_segment *lseg = NULL; |
587f03de | 1965 | struct nfs4_layoutget *lgp; |
183d9e7b JL |
1966 | nfs4_stateid stateid; |
1967 | long timeout = 0; | |
66b53f32 | 1968 | unsigned long giveup = jiffies + (clp->cl_lease_time << 1); |
30005121 | 1969 | bool first; |
e5e94017 | 1970 | |
9a4bf31d | 1971 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) { |
183d9e7b | 1972 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1973 | PNFS_UPDATE_LAYOUT_NO_PNFS); |
f86bbcf8 | 1974 | goto out; |
9a4bf31d | 1975 | } |
d23d61c8 | 1976 | |
9a4bf31d | 1977 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { |
183d9e7b | 1978 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1979 | PNFS_UPDATE_LAYOUT_MDSTHRESH); |
f86bbcf8 | 1980 | goto out; |
9a4bf31d | 1981 | } |
d23d61c8 | 1982 | |
9bf87482 | 1983 | lookup_again: |
d03360aa TM |
1984 | lseg = ERR_PTR(nfs4_client_recover_expired_lease(clp)); |
1985 | if (IS_ERR(lseg)) | |
1986 | goto out; | |
9bf87482 | 1987 | first = false; |
e5e94017 | 1988 | spin_lock(&ino->i_lock); |
9fa40758 | 1989 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1990 | if (lo == NULL) { |
1991 | spin_unlock(&ino->i_lock); | |
183d9e7b | 1992 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1993 | PNFS_UPDATE_LAYOUT_NOMEM); |
830ffb56 TM |
1994 | goto out; |
1995 | } | |
e5e94017 | 1996 | |
43f1b3da | 1997 | /* Do we even need to bother with this? */ |
a59c30ac | 1998 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
183d9e7b | 1999 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 2000 | PNFS_UPDATE_LAYOUT_BULK_RECALL); |
43f1b3da | 2001 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
2002 | goto out_unlock; |
2003 | } | |
2004 | ||
2005 | /* if LAYOUTGET already failed once we don't try again */ | |
2e5b29f0 | 2006 | if (pnfs_layout_io_test_failed(lo, iomode)) { |
183d9e7b | 2007 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 2008 | PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); |
e5e94017 | 2009 | goto out_unlock; |
9a4bf31d | 2010 | } |
e5e94017 | 2011 | |
411ae722 TM |
2012 | /* |
2013 | * If the layout segment list is empty, but there are outstanding | |
2014 | * layoutget calls, then they might be subject to a layoutrecall. | |
2015 | */ | |
0b77f97a | 2016 | if ((list_empty(&lo->plh_segs) || !pnfs_layout_is_valid(lo)) && |
411ae722 TM |
2017 | atomic_read(&lo->plh_outstanding) != 0) { |
2018 | spin_unlock(&ino->i_lock); | |
d03360aa | 2019 | lseg = ERR_PTR(wait_var_event_killable(&lo->plh_outstanding, |
400417b0 | 2020 | !atomic_read(&lo->plh_outstanding))); |
58bbeab4 | 2021 | if (IS_ERR(lseg)) |
411ae722 TM |
2022 | goto out_put_layout_hdr; |
2023 | pnfs_put_layout_hdr(lo); | |
2024 | goto lookup_again; | |
2025 | } | |
2026 | ||
2c8d5fc3 TM |
2027 | /* |
2028 | * Because we free lsegs when sending LAYOUTRETURN, we need to wait | |
2029 | * for LAYOUTRETURN. | |
2030 | */ | |
2031 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { | |
2032 | spin_unlock(&ino->i_lock); | |
2033 | dprintk("%s wait for layoutreturn\n", __func__); | |
2034 | lseg = ERR_PTR(pnfs_prepare_to_retry_layoutget(lo)); | |
2035 | if (!IS_ERR(lseg)) { | |
2036 | pnfs_put_layout_hdr(lo); | |
2037 | dprintk("%s retrying\n", __func__); | |
2038 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, | |
2039 | lseg, | |
2040 | PNFS_UPDATE_LAYOUT_RETRY); | |
2041 | goto lookup_again; | |
2042 | } | |
2043 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
2044 | PNFS_UPDATE_LAYOUT_RETURN); | |
2045 | goto out_put_layout_hdr; | |
2046 | } | |
2047 | ||
c7d73af2 | 2048 | lseg = pnfs_find_lseg(lo, &arg, strict_iomode); |
183d9e7b JL |
2049 | if (lseg) { |
2050 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
2051 | PNFS_UPDATE_LAYOUT_FOUND_CACHED); | |
2052 | goto out_unlock; | |
2053 | } | |
2054 | ||
183d9e7b JL |
2055 | /* |
2056 | * Choose a stateid for the LAYOUTGET. If we don't have a layout | |
2057 | * stateid, or it has been invalidated, then we must use the open | |
2058 | * stateid. | |
2059 | */ | |
67a3b721 | 2060 | if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { |
d9aba2b4 | 2061 | int status; |
183d9e7b JL |
2062 | |
2063 | /* | |
2064 | * The first layoutget for the file. Need to serialize per | |
9bf87482 PT |
2065 | * RFC 5661 Errata 3208. |
2066 | */ | |
2067 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
2068 | &lo->plh_flags)) { | |
2069 | spin_unlock(&ino->i_lock); | |
d03360aa TM |
2070 | lseg = ERR_PTR(wait_on_bit(&lo->plh_flags, |
2071 | NFS_LAYOUT_FIRST_LAYOUTGET, | |
2072 | TASK_KILLABLE)); | |
2073 | if (IS_ERR(lseg)) | |
2074 | goto out_put_layout_hdr; | |
9bf87482 | 2075 | pnfs_put_layout_hdr(lo); |
183d9e7b | 2076 | dprintk("%s retrying\n", __func__); |
9bf87482 PT |
2077 | goto lookup_again; |
2078 | } | |
183d9e7b | 2079 | |
fbf4bcc9 | 2080 | spin_unlock(&ino->i_lock); |
183d9e7b | 2081 | first = true; |
d9aba2b4 | 2082 | status = nfs4_select_rw_stateid(ctx->state, |
70d2f7b1 | 2083 | iomode == IOMODE_RW ? FMODE_WRITE : FMODE_READ, |
d9aba2b4 TM |
2084 | NULL, &stateid, NULL); |
2085 | if (status != 0) { | |
731c74dd | 2086 | lseg = ERR_PTR(status); |
70d2f7b1 TM |
2087 | trace_pnfs_update_layout(ino, pos, count, |
2088 | iomode, lo, lseg, | |
2089 | PNFS_UPDATE_LAYOUT_INVALID_OPEN); | |
d9aba2b4 TM |
2090 | nfs4_schedule_stateid_recovery(server, ctx->state); |
2091 | pnfs_clear_first_layoutget(lo); | |
2092 | pnfs_put_layout_hdr(lo); | |
2093 | goto lookup_again; | |
70d2f7b1 | 2094 | } |
fbf4bcc9 | 2095 | spin_lock(&ino->i_lock); |
9bf87482 | 2096 | } else { |
183d9e7b | 2097 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
9bf87482 | 2098 | } |
568e8c49 | 2099 | |
9a4bf31d | 2100 | if (pnfs_layoutgets_blocked(lo)) { |
183d9e7b | 2101 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 2102 | PNFS_UPDATE_LAYOUT_BLOCKED); |
cf7d63f1 | 2103 | goto out_unlock; |
9a4bf31d | 2104 | } |
411ae722 | 2105 | nfs_layoutget_begin(lo); |
f49f9baa | 2106 | spin_unlock(&ino->i_lock); |
30005121 | 2107 | |
78746a38 | 2108 | _add_to_server_list(lo, server); |
e5e94017 | 2109 | |
09cbfeaf | 2110 | pg_offset = arg.offset & ~PAGE_MASK; |
707ed5fd BH |
2111 | if (pg_offset) { |
2112 | arg.offset -= pg_offset; | |
2113 | arg.length += pg_offset; | |
2114 | } | |
7c24d948 | 2115 | if (arg.length != NFS4_MAX_UINT64) |
09cbfeaf | 2116 | arg.length = PAGE_ALIGN(arg.length); |
707ed5fd | 2117 | |
5e36e2a9 | 2118 | lgp = pnfs_alloc_init_layoutget_args(ino, ctx, &stateid, &arg, gfp_flags); |
587f03de FI |
2119 | if (!lgp) { |
2120 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, NULL, | |
2121 | PNFS_UPDATE_LAYOUT_NOMEM); | |
411ae722 | 2122 | nfs_layoutget_end(lo); |
587f03de FI |
2123 | goto out_put_layout_hdr; |
2124 | } | |
2125 | ||
b4e89bcb TM |
2126 | lgp->lo = lo; |
2127 | pnfs_get_layout_hdr(lo); | |
2128 | ||
dacb452d | 2129 | lseg = nfs4_proc_layoutget(lgp, &timeout); |
183d9e7b JL |
2130 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
2131 | PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); | |
411ae722 | 2132 | nfs_layoutget_end(lo); |
83026d80 | 2133 | if (IS_ERR(lseg)) { |
183d9e7b | 2134 | switch(PTR_ERR(lseg)) { |
e85d7ee4 | 2135 | case -EBUSY: |
183d9e7b JL |
2136 | if (time_after(jiffies, giveup)) |
2137 | lseg = NULL; | |
66b53f32 TM |
2138 | break; |
2139 | case -ERECALLCONFLICT: | |
183d9e7b | 2140 | case -EAGAIN: |
56b38a1f | 2141 | break; |
183d9e7b JL |
2142 | default: |
2143 | if (!nfs_error_is_fatal(PTR_ERR(lseg))) { | |
2144 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
2145 | lseg = NULL; | |
2146 | } | |
56b38a1f TM |
2147 | goto out_put_layout_hdr; |
2148 | } | |
2149 | if (lseg) { | |
2150 | if (first) | |
2151 | pnfs_clear_first_layoutget(lo); | |
2152 | trace_pnfs_update_layout(ino, pos, count, | |
2153 | iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY); | |
2154 | pnfs_put_layout_hdr(lo); | |
2155 | goto lookup_again; | |
83026d80 JL |
2156 | } |
2157 | } else { | |
2158 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
2159 | } | |
2160 | ||
830ffb56 | 2161 | out_put_layout_hdr: |
d67ae825 TH |
2162 | if (first) |
2163 | pnfs_clear_first_layoutget(lo); | |
d5b9216f TM |
2164 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
2165 | PNFS_UPDATE_LAYOUT_EXIT); | |
70c3bd2b | 2166 | pnfs_put_layout_hdr(lo); |
e5e94017 | 2167 | out: |
f86bbcf8 TM |
2168 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
2169 | "(%s, offset: %llu, length: %llu)\n", | |
2170 | __func__, ino->i_sb->s_id, | |
2171 | (unsigned long long)NFS_FILEID(ino), | |
d600ad1f | 2172 | IS_ERR_OR_NULL(lseg) ? "not found" : "found", |
f86bbcf8 TM |
2173 | iomode==IOMODE_RW ? "read/write" : "read-only", |
2174 | (unsigned long long)pos, | |
2175 | (unsigned long long)count); | |
e5e94017 BH |
2176 | return lseg; |
2177 | out_unlock: | |
2178 | spin_unlock(&ino->i_lock); | |
830ffb56 | 2179 | goto out_put_layout_hdr; |
e5e94017 | 2180 | } |
7c24d948 | 2181 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 2182 | |
540d9864 TM |
2183 | static bool |
2184 | pnfs_sanity_check_layout_range(struct pnfs_layout_range *range) | |
2185 | { | |
2186 | switch (range->iomode) { | |
2187 | case IOMODE_READ: | |
2188 | case IOMODE_RW: | |
2189 | break; | |
2190 | default: | |
2191 | return false; | |
2192 | } | |
2193 | if (range->offset == NFS4_MAX_UINT64) | |
2194 | return false; | |
2195 | if (range->length == 0) | |
2196 | return false; | |
2197 | if (range->length != NFS4_MAX_UINT64 && | |
2198 | range->length > NFS4_MAX_UINT64 - range->offset) | |
2199 | return false; | |
2200 | return true; | |
2201 | } | |
2202 | ||
78746a38 FI |
2203 | static struct pnfs_layout_hdr * |
2204 | _pnfs_grab_empty_layout(struct inode *ino, struct nfs_open_context *ctx) | |
2205 | { | |
2206 | struct pnfs_layout_hdr *lo; | |
2207 | ||
2208 | spin_lock(&ino->i_lock); | |
2209 | lo = pnfs_find_alloc_layout(ino, ctx, GFP_KERNEL); | |
2210 | if (!lo) | |
2211 | goto out_unlock; | |
2212 | if (!test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) | |
2213 | goto out_unlock; | |
2214 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
2215 | goto out_unlock; | |
2216 | if (pnfs_layoutgets_blocked(lo)) | |
2217 | goto out_unlock; | |
2218 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, &lo->plh_flags)) | |
2219 | goto out_unlock; | |
411ae722 | 2220 | nfs_layoutget_begin(lo); |
78746a38 FI |
2221 | spin_unlock(&ino->i_lock); |
2222 | _add_to_server_list(lo, NFS_SERVER(ino)); | |
2223 | return lo; | |
2224 | ||
2225 | out_unlock: | |
2226 | spin_unlock(&ino->i_lock); | |
2227 | pnfs_put_layout_hdr(lo); | |
2228 | return NULL; | |
2229 | } | |
2230 | ||
2409a976 FI |
2231 | static void _lgopen_prepare_attached(struct nfs4_opendata *data, |
2232 | struct nfs_open_context *ctx) | |
2233 | { | |
78746a38 FI |
2234 | struct inode *ino = data->dentry->d_inode; |
2235 | struct pnfs_layout_range rng = { | |
2236 | .iomode = (data->o_arg.fmode & FMODE_WRITE) ? | |
2237 | IOMODE_RW: IOMODE_READ, | |
2238 | .offset = 0, | |
2239 | .length = NFS4_MAX_UINT64, | |
2240 | }; | |
2241 | struct nfs4_layoutget *lgp; | |
2242 | struct pnfs_layout_hdr *lo; | |
2243 | ||
64294b08 TM |
2244 | /* Heuristic: don't send layoutget if we have cached data */ |
2245 | if (rng.iomode == IOMODE_READ && | |
2246 | (i_size_read(ino) == 0 || ino->i_mapping->nrpages != 0)) | |
2247 | return; | |
2248 | ||
78746a38 FI |
2249 | lo = _pnfs_grab_empty_layout(ino, ctx); |
2250 | if (!lo) | |
2251 | return; | |
2252 | lgp = pnfs_alloc_init_layoutget_args(ino, ctx, ¤t_stateid, | |
2253 | &rng, GFP_KERNEL); | |
2254 | if (!lgp) { | |
2255 | pnfs_clear_first_layoutget(lo); | |
cb2856c5 | 2256 | nfs_layoutget_end(lo); |
78746a38 FI |
2257 | pnfs_put_layout_hdr(lo); |
2258 | return; | |
2259 | } | |
b4e89bcb | 2260 | lgp->lo = lo; |
78746a38 FI |
2261 | data->lgp = lgp; |
2262 | data->o_arg.lg_args = &lgp->args; | |
2263 | data->o_res.lg_res = &lgp->res; | |
2409a976 FI |
2264 | } |
2265 | ||
2266 | static void _lgopen_prepare_floating(struct nfs4_opendata *data, | |
2267 | struct nfs_open_context *ctx) | |
2268 | { | |
b4e89bcb | 2269 | struct inode *ino = data->dentry->d_inode; |
2409a976 FI |
2270 | struct pnfs_layout_range rng = { |
2271 | .iomode = (data->o_arg.fmode & FMODE_WRITE) ? | |
2272 | IOMODE_RW: IOMODE_READ, | |
2273 | .offset = 0, | |
2274 | .length = NFS4_MAX_UINT64, | |
2275 | }; | |
2276 | struct nfs4_layoutget *lgp; | |
2277 | ||
b4e89bcb | 2278 | lgp = pnfs_alloc_init_layoutget_args(ino, ctx, ¤t_stateid, |
2409a976 FI |
2279 | &rng, GFP_KERNEL); |
2280 | if (!lgp) | |
2281 | return; | |
2282 | data->lgp = lgp; | |
2283 | data->o_arg.lg_args = &lgp->args; | |
2284 | data->o_res.lg_res = &lgp->res; | |
2285 | } | |
2286 | ||
2287 | void pnfs_lgopen_prepare(struct nfs4_opendata *data, | |
2288 | struct nfs_open_context *ctx) | |
2289 | { | |
2290 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
2291 | ||
2292 | if (!(pnfs_enabled_sb(server) && | |
2293 | server->pnfs_curr_ld->flags & PNFS_LAYOUTGET_ON_OPEN)) | |
2294 | return; | |
2295 | /* Could check on max_ops, but currently hardcoded high enough */ | |
6e01260c FI |
2296 | if (!nfs_server_capable(data->dir->d_inode, NFS_CAP_LGOPEN)) |
2297 | return; | |
b4e89bcb TM |
2298 | if (data->lgp) |
2299 | return; | |
2409a976 FI |
2300 | if (data->state) |
2301 | _lgopen_prepare_attached(data, ctx); | |
2302 | else | |
2303 | _lgopen_prepare_floating(data, ctx); | |
2304 | } | |
2305 | ||
2306 | void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, | |
2307 | struct nfs_open_context *ctx) | |
2308 | { | |
2309 | struct pnfs_layout_hdr *lo; | |
2310 | struct pnfs_layout_segment *lseg; | |
c49b5209 | 2311 | struct nfs_server *srv = NFS_SERVER(ino); |
2409a976 FI |
2312 | u32 iomode; |
2313 | ||
6e01260c | 2314 | if (!lgp) |
2409a976 | 2315 | return; |
6e01260c FI |
2316 | dprintk("%s: entered with status %i\n", __func__, lgp->res.status); |
2317 | if (lgp->res.status) { | |
2318 | switch (lgp->res.status) { | |
6e01260c | 2319 | default: |
8dc96566 TM |
2320 | break; |
2321 | /* | |
2322 | * Halt lgopen attempts if the server doesn't recognise | |
2323 | * the "current stateid" value, the layout type, or the | |
2324 | * layoutget operation as being valid. | |
2325 | * Also if it complains about too many ops in the compound | |
2326 | * or of the request/reply being too big. | |
2327 | */ | |
2328 | case -NFS4ERR_BAD_STATEID: | |
2329 | case -NFS4ERR_NOTSUPP: | |
2330 | case -NFS4ERR_REP_TOO_BIG: | |
2331 | case -NFS4ERR_REP_TOO_BIG_TO_CACHE: | |
2332 | case -NFS4ERR_REQ_TOO_BIG: | |
2333 | case -NFS4ERR_TOO_MANY_OPS: | |
2334 | case -NFS4ERR_UNKNOWN_LAYOUTTYPE: | |
c49b5209 | 2335 | srv->caps &= ~NFS_CAP_LGOPEN; |
6e01260c FI |
2336 | } |
2337 | return; | |
2338 | } | |
b4e89bcb | 2339 | if (!lgp->lo) { |
78746a38 FI |
2340 | lo = _pnfs_grab_empty_layout(ino, ctx); |
2341 | if (!lo) | |
2342 | return; | |
b4e89bcb | 2343 | lgp->lo = lo; |
2409a976 | 2344 | } else |
b4e89bcb | 2345 | lo = lgp->lo; |
2409a976 FI |
2346 | |
2347 | lseg = pnfs_layout_process(lgp); | |
32f1c28f | 2348 | if (!IS_ERR(lseg)) { |
2409a976 FI |
2349 | iomode = lgp->args.range.iomode; |
2350 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
2351 | pnfs_put_lseg(lseg); | |
2352 | } | |
30ae2412 FI |
2353 | } |
2354 | ||
2355 | void nfs4_lgopen_release(struct nfs4_layoutget *lgp) | |
2356 | { | |
2357 | if (lgp != NULL) { | |
b4e89bcb TM |
2358 | if (lgp->lo) { |
2359 | pnfs_clear_first_layoutget(lgp->lo); | |
2360 | nfs_layoutget_end(lgp->lo); | |
30ae2412 FI |
2361 | } |
2362 | pnfs_layoutget_free(lgp); | |
2363 | } | |
2409a976 FI |
2364 | } |
2365 | ||
a0b0a6e3 | 2366 | struct pnfs_layout_segment * |
b1f69b75 AA |
2367 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
2368 | { | |
b4e89bcb | 2369 | struct pnfs_layout_hdr *lo = lgp->lo; |
b1f69b75 AA |
2370 | struct nfs4_layoutget_res *res = &lgp->res; |
2371 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 2372 | struct inode *ino = lo->plh_inode; |
78096cca | 2373 | LIST_HEAD(free_me); |
540d9864 TM |
2374 | |
2375 | if (!pnfs_sanity_check_layout_range(&res->range)) | |
1b3c6d07 | 2376 | return ERR_PTR(-EINVAL); |
b1f69b75 AA |
2377 | |
2378 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 2379 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
1b3c6d07 | 2380 | if (IS_ERR_OR_NULL(lseg)) { |
b1f69b75 | 2381 | if (!lseg) |
1b3c6d07 JL |
2382 | lseg = ERR_PTR(-ENOMEM); |
2383 | ||
2384 | dprintk("%s: Could not allocate layout: error %ld\n", | |
2385 | __func__, PTR_ERR(lseg)); | |
2386 | return lseg; | |
b1f69b75 AA |
2387 | } |
2388 | ||
119cef97 | 2389 | pnfs_init_lseg(lo, lseg, &res->range, &res->stateid); |
1013df61 | 2390 | |
b1f69b75 | 2391 | spin_lock(&ino->i_lock); |
e1c06f80 | 2392 | if (pnfs_layoutgets_blocked(lo)) { |
43f1b3da | 2393 | dprintk("%s forget reply due to state\n", __func__); |
1b3c6d07 | 2394 | goto out_forget; |
43f1b3da | 2395 | } |
038d6493 | 2396 | |
0b77f97a TM |
2397 | if (!pnfs_layout_is_valid(lo) && !pnfs_is_first_layoutget(lo)) |
2398 | goto out_forget; | |
2399 | ||
d29b468d | 2400 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
362f7474 CH |
2401 | /* existing state ID, make sure the sequence number matches. */ |
2402 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
0b77f97a | 2403 | if (!pnfs_layout_is_valid(lo)) |
d29b468d | 2404 | lo->plh_barrier = 0; |
362f7474 | 2405 | dprintk("%s forget reply due to sequence\n", __func__); |
1b3c6d07 | 2406 | goto out_forget; |
362f7474 | 2407 | } |
59b56394 | 2408 | pnfs_set_layout_stateid(lo, &res->stateid, lgp->cred, false); |
d29b468d | 2409 | } else if (pnfs_layout_is_valid(lo)) { |
362f7474 CH |
2410 | /* |
2411 | * We got an entirely new state ID. Mark all segments for the | |
9888d837 | 2412 | * inode invalid, and retry the layoutget |
362f7474 | 2413 | */ |
08bd8dbe TM |
2414 | struct pnfs_layout_range range = { |
2415 | .iomode = IOMODE_ANY, | |
2416 | .length = NFS4_MAX_UINT64, | |
2417 | }; | |
fb700ef0 | 2418 | pnfs_mark_matching_lsegs_return(lo, &free_me, &range, 0); |
9888d837 | 2419 | goto out_forget; |
d29b468d TM |
2420 | } else { |
2421 | /* We have a completely new layout */ | |
d29b468d | 2422 | pnfs_set_layout_stateid(lo, &res->stateid, lgp->cred, true); |
362f7474 | 2423 | } |
038d6493 | 2424 | |
9369a431 | 2425 | pnfs_get_lseg(lseg); |
03772d2f | 2426 | pnfs_layout_insert_lseg(lo, lseg, &free_me); |
8e0acf90 | 2427 | |
b1f69b75 | 2428 | |
3976143b | 2429 | if (res->return_on_close) |
f7e8917a | 2430 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
f7e8917a | 2431 | |
b1f69b75 | 2432 | spin_unlock(&ino->i_lock); |
78096cca | 2433 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 2434 | return lseg; |
43f1b3da | 2435 | |
1b3c6d07 | 2436 | out_forget: |
43f1b3da FI |
2437 | spin_unlock(&ino->i_lock); |
2438 | lseg->pls_layout = lo; | |
2439 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1b3c6d07 | 2440 | return ERR_PTR(-EAGAIN); |
b1f69b75 AA |
2441 | } |
2442 | ||
2f215968 TM |
2443 | /** |
2444 | * pnfs_mark_matching_lsegs_return - Free or return matching layout segments | |
2445 | * @lo: pointer to layout header | |
2446 | * @tmp_list: list header to be used with pnfs_free_lseg_list() | |
2447 | * @return_range: describe layout segment ranges to be returned | |
e0b7d420 | 2448 | * @seq: stateid seqid to match |
2f215968 TM |
2449 | * |
2450 | * This function is mainly intended for use by layoutrecall. It attempts | |
2451 | * to free the layout segment immediately, or else to mark it for return | |
2452 | * as soon as its reference count drops to zero. | |
e0b7d420 TM |
2453 | * |
2454 | * Returns | |
2455 | * - 0: a layoutreturn needs to be scheduled. | |
2456 | * - EBUSY: there are layout segment that are still in use. | |
2457 | * - ENOENT: there are no layout segments that need to be returned. | |
2f215968 | 2458 | */ |
10335556 | 2459 | int |
016256df PT |
2460 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
2461 | struct list_head *tmp_list, | |
6d597e17 JL |
2462 | const struct pnfs_layout_range *return_range, |
2463 | u32 seq) | |
016256df PT |
2464 | { |
2465 | struct pnfs_layout_segment *lseg, *next; | |
10335556 | 2466 | int remaining = 0; |
016256df PT |
2467 | |
2468 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
2469 | ||
fc7ff367 | 2470 | assert_spin_locked(&lo->plh_inode->i_lock); |
016256df | 2471 | |
39fd0186 TM |
2472 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
2473 | tmp_list = &lo->plh_return_segs; | |
2474 | ||
016256df | 2475 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
e036f464 | 2476 | if (pnfs_match_lseg_recall(lseg, return_range, seq)) { |
016256df PT |
2477 | dprintk("%s: marking lseg %p iomode %d " |
2478 | "offset %llu length %llu\n", __func__, | |
2479 | lseg, lseg->pls_range.iomode, | |
2480 | lseg->pls_range.offset, | |
2481 | lseg->pls_range.length); | |
39fd0186 TM |
2482 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) |
2483 | tmp_list = &lo->plh_return_segs; | |
ff041727 | 2484 | if (mark_lseg_invalid(lseg, tmp_list)) |
2f215968 TM |
2485 | continue; |
2486 | remaining++; | |
016256df | 2487 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); |
016256df | 2488 | } |
6d597e17 | 2489 | |
e0b7d420 | 2490 | if (remaining) { |
6d597e17 | 2491 | pnfs_set_plh_return_info(lo, return_range->iomode, seq); |
e0b7d420 TM |
2492 | return -EBUSY; |
2493 | } | |
6d597e17 | 2494 | |
e0b7d420 TM |
2495 | if (!list_empty(&lo->plh_return_segs)) { |
2496 | pnfs_set_plh_return_info(lo, return_range->iomode, seq); | |
2497 | return 0; | |
2498 | } | |
2499 | ||
2500 | return -ENOENT; | |
016256df PT |
2501 | } |
2502 | ||
b5fdf841 TM |
2503 | static void |
2504 | pnfs_mark_layout_for_return(struct inode *inode, | |
2505 | const struct pnfs_layout_range *range) | |
016256df | 2506 | { |
b5fdf841 | 2507 | struct pnfs_layout_hdr *lo; |
10335556 | 2508 | bool return_now = false; |
016256df PT |
2509 | |
2510 | spin_lock(&inode->i_lock); | |
b5fdf841 | 2511 | lo = NFS_I(inode)->layout; |
bdebfccd TM |
2512 | if (!pnfs_layout_is_valid(lo)) { |
2513 | spin_unlock(&inode->i_lock); | |
2514 | return; | |
2515 | } | |
b5fdf841 | 2516 | pnfs_set_plh_return_info(lo, range->iomode, 0); |
016256df PT |
2517 | /* |
2518 | * mark all matching lsegs so that we are sure to have no live | |
2519 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
2520 | * for how it works. | |
2521 | */ | |
b5fdf841 | 2522 | if (pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs, range, 0) != -EBUSY) { |
44ea8dfc | 2523 | const struct cred *cred; |
10335556 | 2524 | nfs4_stateid stateid; |
e5fd1904 | 2525 | enum pnfs_iomode iomode; |
10335556 | 2526 | |
44ea8dfc | 2527 | return_now = pnfs_prepare_layoutreturn(lo, &stateid, &cred, &iomode); |
10335556 TM |
2528 | spin_unlock(&inode->i_lock); |
2529 | if (return_now) | |
44ea8dfc | 2530 | pnfs_send_layoutreturn(lo, &stateid, &cred, iomode, false); |
10335556 TM |
2531 | } else { |
2532 | spin_unlock(&inode->i_lock); | |
2533 | nfs_commit_inode(inode, 0); | |
2534 | } | |
016256df | 2535 | } |
b5fdf841 TM |
2536 | |
2537 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
2538 | struct pnfs_layout_segment *lseg) | |
2539 | { | |
2540 | struct pnfs_layout_range range = { | |
2541 | .iomode = lseg->pls_range.iomode, | |
2542 | .offset = 0, | |
2543 | .length = NFS4_MAX_UINT64, | |
2544 | }; | |
2545 | ||
2546 | pnfs_mark_layout_for_return(inode, &range); | |
2547 | } | |
016256df PT |
2548 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); |
2549 | ||
b5fdf841 TM |
2550 | static bool |
2551 | pnfs_layout_can_be_returned(struct pnfs_layout_hdr *lo) | |
2552 | { | |
2553 | return pnfs_layout_is_valid(lo) && | |
2554 | !test_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags) && | |
2555 | !test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
2556 | } | |
2557 | ||
2558 | static struct pnfs_layout_segment * | |
2559 | pnfs_find_first_lseg(struct pnfs_layout_hdr *lo, | |
2560 | const struct pnfs_layout_range *range, | |
2561 | enum pnfs_iomode iomode) | |
2562 | { | |
2563 | struct pnfs_layout_segment *lseg; | |
2564 | ||
2565 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { | |
2566 | if (!test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) | |
2567 | continue; | |
2568 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
2569 | continue; | |
2570 | if (lseg->pls_range.iomode != iomode && iomode != IOMODE_ANY) | |
2571 | continue; | |
2572 | if (pnfs_lseg_range_intersecting(&lseg->pls_range, range)) | |
2573 | return lseg; | |
2574 | } | |
2575 | return NULL; | |
2576 | } | |
2577 | ||
2578 | /* Find open file states whose mode matches that of the range */ | |
2579 | static bool | |
2580 | pnfs_should_return_unused_layout(struct pnfs_layout_hdr *lo, | |
2581 | const struct pnfs_layout_range *range) | |
2582 | { | |
2583 | struct list_head *head; | |
2584 | struct nfs_open_context *ctx; | |
2585 | fmode_t mode = 0; | |
2586 | ||
2587 | if (!pnfs_layout_can_be_returned(lo) || | |
2588 | !pnfs_find_first_lseg(lo, range, range->iomode)) | |
2589 | return false; | |
2590 | ||
2591 | head = &NFS_I(lo->plh_inode)->open_files; | |
2592 | list_for_each_entry_rcu(ctx, head, list) { | |
2593 | if (ctx->state) | |
2594 | mode |= ctx->state->state & (FMODE_READ|FMODE_WRITE); | |
2595 | } | |
2596 | ||
2597 | switch (range->iomode) { | |
2598 | default: | |
2599 | break; | |
2600 | case IOMODE_READ: | |
2601 | mode &= ~FMODE_WRITE; | |
2602 | break; | |
2603 | case IOMODE_RW: | |
2604 | if (pnfs_find_first_lseg(lo, range, IOMODE_READ)) | |
2605 | mode &= ~FMODE_READ; | |
2606 | } | |
2607 | return mode == 0; | |
2608 | } | |
2609 | ||
2610 | static int | |
2611 | pnfs_layout_return_unused_byserver(struct nfs_server *server, void *data) | |
2612 | { | |
2613 | const struct pnfs_layout_range *range = data; | |
2614 | struct pnfs_layout_hdr *lo; | |
2615 | struct inode *inode; | |
2616 | restart: | |
2617 | rcu_read_lock(); | |
2618 | list_for_each_entry_rcu(lo, &server->layouts, plh_layouts) { | |
2619 | if (!pnfs_layout_can_be_returned(lo) || | |
2620 | test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) | |
2621 | continue; | |
2622 | inode = lo->plh_inode; | |
2623 | spin_lock(&inode->i_lock); | |
2624 | if (!pnfs_should_return_unused_layout(lo, range)) { | |
2625 | spin_unlock(&inode->i_lock); | |
2626 | continue; | |
2627 | } | |
2628 | spin_unlock(&inode->i_lock); | |
2629 | inode = pnfs_grab_inode_layout_hdr(lo); | |
2630 | if (!inode) | |
2631 | continue; | |
2632 | rcu_read_unlock(); | |
2633 | pnfs_mark_layout_for_return(inode, range); | |
2634 | iput(inode); | |
2635 | cond_resched(); | |
2636 | goto restart; | |
2637 | } | |
2638 | rcu_read_unlock(); | |
2639 | return 0; | |
2640 | } | |
2641 | ||
2642 | void | |
2643 | pnfs_layout_return_unused_byclid(struct nfs_client *clp, | |
2644 | enum pnfs_iomode iomode) | |
2645 | { | |
2646 | struct pnfs_layout_range range = { | |
2647 | .iomode = iomode, | |
2648 | .offset = 0, | |
2649 | .length = NFS4_MAX_UINT64, | |
2650 | }; | |
2651 | ||
2652 | nfs_client_for_each_server(clp, pnfs_layout_return_unused_byserver, | |
2653 | &range); | |
2654 | } | |
2655 | ||
b3230e80 TM |
2656 | void |
2657 | pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio) | |
2658 | { | |
2659 | if (pgio->pg_lseg == NULL || | |
2660 | test_bit(NFS_LSEG_VALID, &pgio->pg_lseg->pls_flags)) | |
2661 | return; | |
2662 | pnfs_put_lseg(pgio->pg_lseg); | |
2663 | pgio->pg_lseg = NULL; | |
2664 | } | |
2665 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_check_layout); | |
2666 | ||
08cb5b0f BC |
2667 | /* |
2668 | * Check for any intersection between the request and the pgio->pg_lseg, | |
2669 | * and if none, put this pgio->pg_lseg away. | |
2670 | */ | |
e1e54ab7 | 2671 | void |
08cb5b0f BC |
2672 | pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
2673 | { | |
2674 | if (pgio->pg_lseg && !pnfs_lseg_request_intersecting(pgio->pg_lseg, req)) { | |
2675 | pnfs_put_lseg(pgio->pg_lseg); | |
2676 | pgio->pg_lseg = NULL; | |
2677 | } | |
2678 | } | |
e1e54ab7 | 2679 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_check_range); |
08cb5b0f | 2680 | |
d8007d4d TM |
2681 | void |
2682 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
2683 | { | |
d1d97395 | 2684 | u64 rd_size; |
1fd937bd | 2685 | |
b3230e80 | 2686 | pnfs_generic_pg_check_layout(pgio); |
08cb5b0f | 2687 | pnfs_generic_pg_check_range(pgio, req); |
cb5d04bc PT |
2688 | if (pgio->pg_lseg == NULL) { |
2689 | if (pgio->pg_dreq == NULL) | |
2690 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
2691 | else | |
2692 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
2693 | ||
2694 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
9fcd5960 | 2695 | nfs_req_openctx(req), |
cb5d04bc PT |
2696 | req_offset(req), |
2697 | rd_size, | |
2698 | IOMODE_READ, | |
c7d73af2 | 2699 | false, |
cb5d04bc | 2700 | GFP_KERNEL); |
d600ad1f PT |
2701 | if (IS_ERR(pgio->pg_lseg)) { |
2702 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
2703 | pgio->pg_lseg = NULL; | |
2704 | return; | |
2705 | } | |
cb5d04bc | 2706 | } |
e885de1a TM |
2707 | /* If no lseg, fall back to read through mds */ |
2708 | if (pgio->pg_lseg == NULL) | |
1f945357 | 2709 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 2710 | |
d8007d4d TM |
2711 | } |
2712 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
2713 | ||
2714 | void | |
6296556f PT |
2715 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
2716 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 2717 | { |
b3230e80 | 2718 | pnfs_generic_pg_check_layout(pgio); |
08cb5b0f | 2719 | pnfs_generic_pg_check_range(pgio, req); |
d600ad1f | 2720 | if (pgio->pg_lseg == NULL) { |
cb5d04bc | 2721 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
9fcd5960 | 2722 | nfs_req_openctx(req), |
cb5d04bc PT |
2723 | req_offset(req), |
2724 | wb_size, | |
2725 | IOMODE_RW, | |
c7d73af2 | 2726 | false, |
2b17d725 | 2727 | GFP_KERNEL); |
d600ad1f PT |
2728 | if (IS_ERR(pgio->pg_lseg)) { |
2729 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
2730 | pgio->pg_lseg = NULL; | |
2731 | return; | |
2732 | } | |
2733 | } | |
e885de1a TM |
2734 | /* If no lseg, fall back to write through mds */ |
2735 | if (pgio->pg_lseg == NULL) | |
1f945357 | 2736 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
2737 | } |
2738 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
2739 | ||
180bb5ec WAA |
2740 | void |
2741 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
2742 | { | |
2743 | if (desc->pg_lseg) { | |
2744 | pnfs_put_lseg(desc->pg_lseg); | |
2745 | desc->pg_lseg = NULL; | |
2746 | } | |
2747 | } | |
2748 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
2749 | ||
b4fdac1a WAA |
2750 | /* |
2751 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
2752 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
2753 | */ | |
2754 | size_t | |
a7d42ddb WAA |
2755 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
2756 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 2757 | { |
0f9c429e | 2758 | unsigned int size; |
c5e20cb7 | 2759 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
2760 | |
2761 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
2762 | if (!size) |
2763 | return 0; | |
94ad1c80 | 2764 | |
19982ba8 | 2765 | /* |
c5e20cb7 WAA |
2766 | * 'size' contains the number of bytes left in the current page (up |
2767 | * to the original size asked for in @req->wb_bytes). | |
2768 | * | |
2769 | * Calculate how many bytes are left in the layout segment | |
2770 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
2771 | * |
2772 | * Please also note that 'end_offset' is actually the offset of the | |
2773 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
2774 | * | |
2775 | */ | |
19b54848 | 2776 | if (pgio->pg_lseg) { |
17822b20 | 2777 | seg_end = pnfs_end_offset(pgio->pg_lseg->pls_range.offset, |
c5e20cb7 WAA |
2778 | pgio->pg_lseg->pls_range.length); |
2779 | req_start = req_offset(req); | |
08cb5b0f | 2780 | |
c5e20cb7 | 2781 | /* start of request is past the last byte of this segment */ |
08cb5b0f | 2782 | if (req_start >= seg_end) |
19b54848 | 2783 | return 0; |
c5e20cb7 WAA |
2784 | |
2785 | /* adjust 'size' iff there are fewer bytes left in the | |
2786 | * segment than what nfs_generic_pg_test returned */ | |
2787 | seg_left = seg_end - req_start; | |
2788 | if (seg_left < size) | |
2789 | size = (unsigned int)seg_left; | |
19b54848 | 2790 | } |
0f9c429e | 2791 | |
19b54848 | 2792 | return size; |
94ad1c80 | 2793 | } |
89a58e32 | 2794 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 2795 | |
53113ad3 | 2796 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
2797 | { |
2798 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
2799 | |
2800 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
2801 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
2802 | hdr->completion_ops); | |
c7070113 | 2803 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 2804 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 2805 | } |
e7dd79af | 2806 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 2807 | |
d45f60c6 | 2808 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2809 | { |
cd841605 FI |
2810 | |
2811 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
2812 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2813 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2814 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2815 | } |
6c75dc0d | 2816 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2817 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
2818 | } |
2819 | ||
d20581aa BH |
2820 | /* |
2821 | * Called by non rpc-based layout drivers | |
2822 | */ | |
d45f60c6 | 2823 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 2824 | { |
f8417b48 | 2825 | if (likely(!hdr->pnfs_error)) { |
67af7611 TM |
2826 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
2827 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 2828 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
2829 | } |
2830 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); | |
2831 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2832 | pnfs_ld_handle_write_error(hdr); |
2833 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 2834 | } |
d20581aa | 2835 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 2836 | |
dce81290 TM |
2837 | static void |
2838 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2839 | struct nfs_pgio_header *hdr) |
dce81290 | 2840 | { |
48d635f1 | 2841 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2842 | |
6c75dc0d | 2843 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2844 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 2845 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 2846 | mirror->pg_recoalesce = 1; |
6c75dc0d | 2847 | } |
ba4a76f7 | 2848 | hdr->completion_ops->completion(hdr); |
dce81290 TM |
2849 | } |
2850 | ||
2851 | static enum pnfs_try_status | |
d45f60c6 | 2852 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
2853 | const struct rpc_call_ops *call_ops, |
2854 | struct pnfs_layout_segment *lseg, | |
2855 | int how) | |
0382b744 | 2856 | { |
cd841605 | 2857 | struct inode *inode = hdr->inode; |
0382b744 AA |
2858 | enum pnfs_try_status trypnfs; |
2859 | struct nfs_server *nfss = NFS_SERVER(inode); | |
2860 | ||
cd841605 | 2861 | hdr->mds_ops = call_ops; |
0382b744 AA |
2862 | |
2863 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
2864 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
2865 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 2866 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 2867 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
2868 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2869 | return trypnfs; | |
2870 | } | |
2871 | ||
dce81290 | 2872 | static void |
7f714720 WAA |
2873 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
2874 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 2875 | { |
dce81290 TM |
2876 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2877 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2878 | enum pnfs_try_status trypnfs; |
dce81290 | 2879 | |
d45f60c6 | 2880 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
37f8aa16 TM |
2881 | switch (trypnfs) { |
2882 | case PNFS_NOT_ATTEMPTED: | |
d45f60c6 | 2883 | pnfs_write_through_mds(desc, hdr); |
ffb81717 | 2884 | break; |
37f8aa16 TM |
2885 | case PNFS_ATTEMPTED: |
2886 | break; | |
2887 | case PNFS_TRY_AGAIN: | |
2888 | /* cleanup hdr and prepare to redo pnfs */ | |
2889 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
2890 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); | |
2891 | list_splice_init(&hdr->pages, &mirror->pg_list); | |
2892 | mirror->pg_recoalesce = 1; | |
2893 | } | |
2894 | hdr->mds_ops->rpc_release(hdr); | |
2895 | } | |
dce81290 TM |
2896 | } |
2897 | ||
6c75dc0d FI |
2898 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
2899 | { | |
9369a431 | 2900 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2901 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
2902 | } |
2903 | ||
dce81290 TM |
2904 | int |
2905 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
2906 | { | |
6c75dc0d | 2907 | struct nfs_pgio_header *hdr; |
dce81290 TM |
2908 | int ret; |
2909 | ||
1e7f3a48 WAA |
2910 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2911 | if (!hdr) { | |
2bff2288 PT |
2912 | desc->pg_error = -ENOMEM; |
2913 | return desc->pg_error; | |
dce81290 | 2914 | } |
6c75dc0d | 2915 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 2916 | |
9369a431 | 2917 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2918 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2919 | if (!ret) |
7f714720 | 2920 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 2921 | |
6c75dc0d | 2922 | return ret; |
dce81290 TM |
2923 | } |
2924 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
2925 | ||
53113ad3 | 2926 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
2927 | { |
2928 | struct nfs_pageio_descriptor pgio; | |
2929 | ||
1acbbb4e | 2930 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
2931 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
2932 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 2933 | } |
e7dd79af | 2934 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 2935 | |
d45f60c6 | 2936 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2937 | { |
cd841605 FI |
2938 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
2939 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2940 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2941 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2942 | } |
4db6e0b7 | 2943 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2944 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
2945 | } |
2946 | ||
d20581aa BH |
2947 | /* |
2948 | * Called by non rpc-based layout drivers | |
2949 | */ | |
d45f60c6 | 2950 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 2951 | { |
bfc505de | 2952 | if (likely(!hdr->pnfs_error)) |
d45f60c6 | 2953 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
2954 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
2955 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2956 | pnfs_ld_handle_read_error(hdr); |
2957 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
2958 | } |
2959 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
2960 | ||
493292dd TM |
2961 | static void |
2962 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2963 | struct nfs_pgio_header *hdr) |
493292dd | 2964 | { |
48d635f1 | 2965 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2966 | |
4db6e0b7 | 2967 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2968 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 2969 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 2970 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 2971 | } |
ba4a76f7 | 2972 | hdr->completion_ops->completion(hdr); |
493292dd TM |
2973 | } |
2974 | ||
64419a9b AA |
2975 | /* |
2976 | * Call the appropriate parallel I/O subsystem read function. | |
2977 | */ | |
493292dd | 2978 | static enum pnfs_try_status |
d45f60c6 | 2979 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2980 | const struct rpc_call_ops *call_ops, |
2981 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2982 | { |
cd841605 | 2983 | struct inode *inode = hdr->inode; |
64419a9b AA |
2984 | struct nfs_server *nfss = NFS_SERVER(inode); |
2985 | enum pnfs_try_status trypnfs; | |
2986 | ||
cd841605 | 2987 | hdr->mds_ops = call_ops; |
64419a9b AA |
2988 | |
2989 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2990 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2991 | |
d45f60c6 | 2992 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2993 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2994 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2995 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2996 | return trypnfs; | |
2997 | } | |
863a3c6c | 2998 | |
ceb11e13 | 2999 | /* Resend all requests through pnfs. */ |
563c53e7 TM |
3000 | void pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr, |
3001 | unsigned int mirror_idx) | |
ceb11e13 PT |
3002 | { |
3003 | struct nfs_pageio_descriptor pgio; | |
3004 | ||
1b1bc66b | 3005 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
54e4a0df TM |
3006 | /* Prevent deadlocks with layoutreturn! */ |
3007 | pnfs_put_lseg(hdr->lseg); | |
3008 | hdr->lseg = NULL; | |
3009 | ||
1b1bc66b WAA |
3010 | nfs_pageio_init_read(&pgio, hdr->inode, false, |
3011 | hdr->completion_ops); | |
563c53e7 | 3012 | pgio.pg_mirror_idx = mirror_idx; |
1b1bc66b WAA |
3013 | hdr->task.tk_status = nfs_pageio_resend(&pgio, hdr); |
3014 | } | |
ceb11e13 PT |
3015 | } |
3016 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
3017 | ||
493292dd | 3018 | static void |
7f714720 | 3019 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 3020 | { |
493292dd TM |
3021 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
3022 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 3023 | enum pnfs_try_status trypnfs; |
493292dd | 3024 | |
d45f60c6 | 3025 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
6aeafd05 TM |
3026 | switch (trypnfs) { |
3027 | case PNFS_NOT_ATTEMPTED: | |
d45f60c6 | 3028 | pnfs_read_through_mds(desc, hdr); |
ffb81717 | 3029 | break; |
6aeafd05 TM |
3030 | case PNFS_ATTEMPTED: |
3031 | break; | |
3032 | case PNFS_TRY_AGAIN: | |
3033 | /* cleanup hdr and prepare to redo pnfs */ | |
3034 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
3035 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); | |
3036 | list_splice_init(&hdr->pages, &mirror->pg_list); | |
3037 | mirror->pg_recoalesce = 1; | |
3038 | } | |
3039 | hdr->mds_ops->rpc_release(hdr); | |
3040 | } | |
493292dd TM |
3041 | } |
3042 | ||
4db6e0b7 FI |
3043 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
3044 | { | |
9369a431 | 3045 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 3046 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
3047 | } |
3048 | ||
493292dd TM |
3049 | int |
3050 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
3051 | { | |
4db6e0b7 | 3052 | struct nfs_pgio_header *hdr; |
493292dd TM |
3053 | int ret; |
3054 | ||
1e7f3a48 WAA |
3055 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
3056 | if (!hdr) { | |
2bff2288 PT |
3057 | desc->pg_error = -ENOMEM; |
3058 | return desc->pg_error; | |
493292dd | 3059 | } |
4db6e0b7 | 3060 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 3061 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 3062 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 3063 | if (!ret) |
7f714720 | 3064 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 3065 | return ret; |
493292dd TM |
3066 | } |
3067 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
3068 | ||
71244d9b TM |
3069 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
3070 | { | |
3071 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
3072 | ||
3073 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 3074 | smp_mb__after_atomic(); |
71244d9b TM |
3075 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
3076 | } | |
3077 | ||
863a3c6c | 3078 | /* |
a9bae566 | 3079 | * There can be multiple RW segments. |
863a3c6c | 3080 | */ |
a9bae566 | 3081 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 3082 | { |
a9bae566 | 3083 | struct pnfs_layout_segment *lseg; |
863a3c6c | 3084 | |
a9bae566 PT |
3085 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
3086 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 3087 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
3088 | list_add(&lseg->pls_lc_list, listp); |
3089 | } | |
863a3c6c AA |
3090 | } |
3091 | ||
a073dbff TM |
3092 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
3093 | { | |
3094 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
3095 | |
3096 | /* Matched by references in pnfs_set_layoutcommit */ | |
3097 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
3098 | list_del_init(&lseg->pls_lc_list); | |
3099 | pnfs_put_lseg(lseg); | |
3100 | } | |
3101 | ||
71244d9b | 3102 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
3103 | } |
3104 | ||
1b0ae068 PT |
3105 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
3106 | { | |
b9e028fd | 3107 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
3108 | } |
3109 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
3110 | ||
863a3c6c | 3111 | void |
67af7611 TM |
3112 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
3113 | loff_t end_pos) | |
863a3c6c | 3114 | { |
cd841605 | 3115 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 3116 | bool mark_as_dirty = false; |
863a3c6c | 3117 | |
cd841605 | 3118 | spin_lock(&inode->i_lock); |
863a3c6c | 3119 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 3120 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 3121 | mark_as_dirty = true; |
863a3c6c | 3122 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 3123 | __func__, inode->i_ino); |
29559b11 TM |
3124 | } else if (end_pos > nfsi->layout->plh_lwb) |
3125 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 3126 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 3127 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 3128 | pnfs_get_lseg(lseg); |
a9bae566 | 3129 | } |
cd841605 | 3130 | spin_unlock(&inode->i_lock); |
acff5880 | 3131 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 3132 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
3133 | |
3134 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
3135 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
3136 | if (mark_as_dirty) | |
cd841605 | 3137 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
3138 | } |
3139 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
3140 | ||
db29c089 AA |
3141 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
3142 | { | |
3143 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
3144 | ||
3145 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
3146 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 3147 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
3148 | } |
3149 | ||
de4b15c7 AA |
3150 | /* |
3151 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
3152 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
3153 | * data to disk to allow the server to recover the data if it crashes. | |
3154 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
3155 | * is off, and a COMMIT is sent to a data server, or | |
3156 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
3157 | */ | |
863a3c6c | 3158 | int |
ef311537 | 3159 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 3160 | { |
5f919c9f | 3161 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
3162 | struct nfs4_layoutcommit_data *data; |
3163 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 3164 | loff_t end_pos; |
71244d9b | 3165 | int status; |
863a3c6c | 3166 | |
71244d9b | 3167 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
3168 | return 0; |
3169 | ||
71244d9b | 3170 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 3171 | |
71244d9b | 3172 | status = -EAGAIN; |
92407e75 | 3173 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
3174 | if (!sync) |
3175 | goto out; | |
74316201 | 3176 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
3177 | NFS_INO_LAYOUTCOMMITTING, |
3178 | nfs_wait_bit_killable, | |
3179 | TASK_KILLABLE); | |
92407e75 | 3180 | if (status) |
71244d9b | 3181 | goto out; |
92407e75 PT |
3182 | } |
3183 | ||
71244d9b TM |
3184 | status = -ENOMEM; |
3185 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
3186 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
3187 | if (!data) | |
3188 | goto clear_layoutcommitting; | |
3189 | ||
3190 | status = 0; | |
de4b15c7 | 3191 | spin_lock(&inode->i_lock); |
71244d9b TM |
3192 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
3193 | goto out_unlock; | |
a9bae566 | 3194 | |
71244d9b | 3195 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 3196 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 3197 | |
acff5880 | 3198 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 3199 | |
f597c537 | 3200 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
97a728f5 | 3201 | data->cred = get_cred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
3202 | spin_unlock(&inode->i_lock); |
3203 | ||
3204 | data->args.inode = inode; | |
863a3c6c AA |
3205 | nfs_fattr_init(&data->fattr); |
3206 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
3207 | data->res.fattr = &data->fattr; | |
2e18d4d8 TM |
3208 | if (end_pos != 0) |
3209 | data->args.lastbytewritten = end_pos - 1; | |
3210 | else | |
3211 | data->args.lastbytewritten = U64_MAX; | |
863a3c6c AA |
3212 | data->res.server = NFS_SERVER(inode); |
3213 | ||
5f919c9f CH |
3214 | if (ld->prepare_layoutcommit) { |
3215 | status = ld->prepare_layoutcommit(&data->args); | |
3216 | if (status) { | |
a52458b4 | 3217 | put_cred(data->cred); |
5f919c9f | 3218 | spin_lock(&inode->i_lock); |
29559b11 TM |
3219 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
3220 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f | 3221 | nfsi->layout->plh_lwb = end_pos; |
3471648a | 3222 | goto out_unlock; |
5f919c9f CH |
3223 | } |
3224 | } | |
3225 | ||
3226 | ||
863a3c6c AA |
3227 | status = nfs4_proc_layoutcommit(data, sync); |
3228 | out: | |
92407e75 PT |
3229 | if (status) |
3230 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
3231 | dprintk("<-- %s status %d\n", __func__, status); |
3232 | return status; | |
71244d9b TM |
3233 | out_unlock: |
3234 | spin_unlock(&inode->i_lock); | |
92407e75 | 3235 | kfree(data); |
71244d9b TM |
3236 | clear_layoutcommitting: |
3237 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 3238 | goto out; |
863a3c6c | 3239 | } |
72cff449 | 3240 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 3241 | |
5bb89b47 TM |
3242 | int |
3243 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
3244 | { | |
3245 | return pnfs_layoutcommit_inode(inode, true); | |
3246 | } | |
3247 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
3248 | ||
82be417a AA |
3249 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
3250 | { | |
3251 | struct nfs4_threshold *thp; | |
3252 | ||
3253 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
3254 | if (!thp) { | |
3255 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
3256 | return NULL; | |
3257 | } | |
3258 | return thp; | |
3259 | } | |
8733408d | 3260 | |
865a7ecb | 3261 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d | 3262 | int |
c8ad8894 | 3263 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
8733408d PT |
3264 | { |
3265 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
3266 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 3267 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
3268 | struct nfs42_layoutstat_data *data; |
3269 | struct pnfs_layout_hdr *hdr; | |
3270 | int status = 0; | |
3271 | ||
3272 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
3273 | goto out; | |
3274 | ||
6c5a0d89 TM |
3275 | if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS)) |
3276 | goto out; | |
3277 | ||
1bfe3b25 PT |
3278 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
3279 | goto out; | |
3280 | ||
8733408d PT |
3281 | spin_lock(&inode->i_lock); |
3282 | if (!NFS_I(inode)->layout) { | |
3283 | spin_unlock(&inode->i_lock); | |
f538d0ba | 3284 | goto out_clear_layoutstats; |
8733408d PT |
3285 | } |
3286 | hdr = NFS_I(inode)->layout; | |
3287 | pnfs_get_layout_hdr(hdr); | |
3288 | spin_unlock(&inode->i_lock); | |
3289 | ||
c8ad8894 | 3290 | data = kzalloc(sizeof(*data), gfp_flags); |
8733408d PT |
3291 | if (!data) { |
3292 | status = -ENOMEM; | |
3293 | goto out_put; | |
3294 | } | |
3295 | ||
3296 | data->args.fh = NFS_FH(inode); | |
3297 | data->args.inode = inode; | |
8733408d PT |
3298 | status = ld->prepare_layoutstats(&data->args); |
3299 | if (status) | |
3300 | goto out_free; | |
3301 | ||
3302 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
3303 | ||
3304 | out: | |
3305 | dprintk("%s returns %d\n", __func__, status); | |
3306 | return status; | |
3307 | ||
3308 | out_free: | |
3309 | kfree(data); | |
3310 | out_put: | |
3311 | pnfs_put_layout_hdr(hdr); | |
f538d0ba | 3312 | out_clear_layoutstats: |
1bfe3b25 PT |
3313 | smp_mb__before_atomic(); |
3314 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
3315 | smp_mb__after_atomic(); | |
8733408d PT |
3316 | goto out; |
3317 | } | |
3318 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 3319 | #endif |
bbf58bf3 TM |
3320 | |
3321 | unsigned int layoutstats_timer; | |
3322 | module_param(layoutstats_timer, uint, 0644); | |
3323 | EXPORT_SYMBOL_GPL(layoutstats_timer); |