Commit | Line | Data |
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85e174ba RL |
1 | /* |
2 | * pNFS functions to call and manage layout drivers. | |
3 | * | |
4 | * Copyright (c) 2002 [year of first publication] | |
5 | * The Regents of the University of Michigan | |
6 | * All Rights Reserved | |
7 | * | |
8 | * Dean Hildebrand <dhildebz@umich.edu> | |
9 | * | |
10 | * Permission is granted to use, copy, create derivative works, and | |
11 | * redistribute this software and such derivative works for any purpose, | |
12 | * so long as the name of the University of Michigan is not used in | |
13 | * any advertising or publicity pertaining to the use or distribution | |
14 | * of this software without specific, written prior authorization. If | |
15 | * the above copyright notice or any other identification of the | |
16 | * University of Michigan is included in any copy of any portion of | |
17 | * this software, then the disclaimer below must also be included. | |
18 | * | |
19 | * This software is provided as is, without representation or warranty | |
20 | * of any kind either express or implied, including without limitation | |
21 | * the implied warranties of merchantability, fitness for a particular | |
22 | * purpose, or noninfringement. The Regents of the University of | |
23 | * Michigan shall not be liable for any damages, including special, | |
24 | * indirect, incidental, or consequential damages, with respect to any | |
25 | * claim arising out of or in connection with the use of the software, | |
26 | * even if it has been or is hereafter advised of the possibility of | |
27 | * such damages. | |
28 | */ | |
29 | ||
30 | #include <linux/nfs_fs.h> | |
493292dd | 31 | #include <linux/nfs_page.h> |
143cb494 | 32 | #include <linux/module.h> |
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 | ||
4aab9732 TM |
327 | static void |
328 | pnfs_set_plh_return_info(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode, | |
329 | u32 seq) | |
330 | { | |
331 | if (lo->plh_return_iomode != 0 && lo->plh_return_iomode != iomode) | |
332 | iomode = IOMODE_ANY; | |
333 | lo->plh_return_iomode = iomode; | |
334 | set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); | |
335 | if (seq != 0) { | |
336 | WARN_ON_ONCE(lo->plh_return_seq != 0 && lo->plh_return_seq != seq); | |
337 | lo->plh_return_seq = seq; | |
338 | } | |
339 | } | |
340 | ||
ae5a459d TM |
341 | static void |
342 | pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo) | |
343 | { | |
5466d214 | 344 | struct pnfs_layout_segment *lseg; |
ae5a459d TM |
345 | lo->plh_return_iomode = 0; |
346 | lo->plh_return_seq = 0; | |
347 | clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags); | |
5466d214 TM |
348 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
349 | if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
350 | continue; | |
351 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); | |
352 | } | |
ae5a459d TM |
353 | } |
354 | ||
362fb578 TM |
355 | static void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) |
356 | { | |
357 | clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
358 | clear_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags); | |
359 | smp_mb__after_atomic(); | |
360 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
361 | rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); | |
362 | } | |
363 | ||
fe1cf946 TM |
364 | static void |
365 | pnfs_clear_lseg_state(struct pnfs_layout_segment *lseg, | |
366 | struct list_head *free_me) | |
367 | { | |
368 | clear_bit(NFS_LSEG_ROC, &lseg->pls_flags); | |
369 | clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
370 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) | |
371 | pnfs_lseg_dec_and_remove_zero(lseg, free_me); | |
372 | if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
373 | pnfs_lseg_dec_and_remove_zero(lseg, free_me); | |
374 | } | |
375 | ||
7380020e | 376 | /* |
30cb3ee2 TM |
377 | * Update the seqid of a layout stateid after receiving |
378 | * NFS4ERR_OLD_STATEID | |
7380020e | 379 | */ |
30cb3ee2 | 380 | bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, |
ecf84026 TM |
381 | struct pnfs_layout_range *dst_range, |
382 | struct inode *inode) | |
7380020e TM |
383 | { |
384 | struct pnfs_layout_hdr *lo; | |
c16467dc TM |
385 | struct pnfs_layout_range range = { |
386 | .iomode = IOMODE_ANY, | |
387 | .offset = 0, | |
388 | .length = NFS4_MAX_UINT64, | |
389 | }; | |
7380020e | 390 | bool ret = false; |
c16467dc TM |
391 | LIST_HEAD(head); |
392 | int err; | |
7380020e TM |
393 | |
394 | spin_lock(&inode->i_lock); | |
395 | lo = NFS_I(inode)->layout; | |
30cb3ee2 TM |
396 | if (lo && pnfs_layout_is_valid(lo) && |
397 | nfs4_stateid_match_other(dst, &lo->plh_stateid)) { | |
398 | /* Is our call using the most recent seqid? If so, bump it */ | |
399 | if (!nfs4_stateid_is_newer(&lo->plh_stateid, dst)) { | |
400 | nfs4_stateid_seqid_inc(dst); | |
401 | ret = true; | |
402 | goto out; | |
403 | } | |
404 | /* Try to update the seqid to the most recent */ | |
c16467dc TM |
405 | err = pnfs_mark_matching_lsegs_return(lo, &head, &range, 0); |
406 | if (err != -EBUSY) { | |
407 | dst->seqid = lo->plh_stateid.seqid; | |
ecf84026 | 408 | *dst_range = range; |
c16467dc TM |
409 | ret = true; |
410 | } | |
7380020e | 411 | } |
30cb3ee2 | 412 | out: |
7380020e | 413 | spin_unlock(&inode->i_lock); |
c16467dc | 414 | pnfs_free_lseg_list(&head); |
7380020e TM |
415 | return ret; |
416 | } | |
417 | ||
2454dfea TM |
418 | /* |
419 | * Mark a pnfs_layout_hdr and all associated layout segments as invalid | |
420 | * | |
421 | * In order to continue using the pnfs_layout_hdr, a full recovery | |
422 | * is required. | |
423 | * Note that caller must hold inode->i_lock. | |
424 | */ | |
5f46be04 | 425 | int |
2454dfea TM |
426 | pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, |
427 | struct list_head *lseg_list) | |
428 | { | |
429 | struct pnfs_layout_range range = { | |
430 | .iomode = IOMODE_ANY, | |
431 | .offset = 0, | |
432 | .length = NFS4_MAX_UINT64, | |
433 | }; | |
fe1cf946 | 434 | struct pnfs_layout_segment *lseg, *next; |
2454dfea TM |
435 | |
436 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
fe1cf946 TM |
437 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
438 | pnfs_clear_lseg_state(lseg, lseg_list); | |
5466d214 | 439 | pnfs_clear_layoutreturn_info(lo); |
68f74479 | 440 | pnfs_free_returned_lsegs(lo, lseg_list, &range, 0); |
362fb578 TM |
441 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) && |
442 | !test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) | |
443 | pnfs_clear_layoutreturn_waitbit(lo); | |
fe1cf946 | 444 | return !list_empty(&lo->plh_segs); |
2454dfea TM |
445 | } |
446 | ||
b9e028fd TM |
447 | static int |
448 | pnfs_iomode_to_fail_bit(u32 iomode) | |
449 | { | |
450 | return iomode == IOMODE_RW ? | |
451 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; | |
452 | } | |
453 | ||
454 | static void | |
3e621214 | 455 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
b9e028fd | 456 | { |
25c75333 | 457 | lo->plh_retry_timestamp = jiffies; |
39e88fcf | 458 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
2b28a7be | 459 | refcount_inc(&lo->plh_refcount); |
3e621214 TM |
460 | } |
461 | ||
462 | static void | |
463 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) | |
464 | { | |
465 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) | |
2b28a7be | 466 | refcount_dec(&lo->plh_refcount); |
3e621214 TM |
467 | } |
468 | ||
469 | static void | |
470 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
471 | { | |
472 | struct inode *inode = lo->plh_inode; | |
115ce575 TM |
473 | struct pnfs_layout_range range = { |
474 | .iomode = iomode, | |
475 | .offset = 0, | |
476 | .length = NFS4_MAX_UINT64, | |
477 | }; | |
478 | LIST_HEAD(head); | |
3e621214 TM |
479 | |
480 | spin_lock(&inode->i_lock); | |
481 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
6d597e17 | 482 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range, 0); |
3e621214 | 483 | spin_unlock(&inode->i_lock); |
115ce575 | 484 | pnfs_free_lseg_list(&head); |
b9e028fd TM |
485 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
486 | iomode == IOMODE_RW ? "RW" : "READ"); | |
487 | } | |
488 | ||
489 | static bool | |
490 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) | |
491 | { | |
25c75333 | 492 | unsigned long start, end; |
3e621214 TM |
493 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
494 | ||
495 | if (test_bit(fail_bit, &lo->plh_flags) == 0) | |
25c75333 TM |
496 | return false; |
497 | end = jiffies; | |
498 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; | |
499 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { | |
500 | /* It is time to retry the failed layoutgets */ | |
3e621214 | 501 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
25c75333 TM |
502 | return false; |
503 | } | |
504 | return true; | |
b9e028fd TM |
505 | } |
506 | ||
974cec8c | 507 | static void |
119cef97 TM |
508 | pnfs_init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg, |
509 | const struct pnfs_layout_range *range, | |
510 | const nfs4_stateid *stateid) | |
974cec8c | 511 | { |
566052c5 | 512 | INIT_LIST_HEAD(&lseg->pls_list); |
a9bae566 | 513 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
a9901899 | 514 | INIT_LIST_HEAD(&lseg->pls_commits); |
eba6dd69 | 515 | refcount_set(&lseg->pls_refcount, 1); |
4541d16c | 516 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); |
566052c5 | 517 | lseg->pls_layout = lo; |
119cef97 TM |
518 | lseg->pls_range = *range; |
519 | lseg->pls_seq = be32_to_cpu(stateid->seqid); | |
974cec8c AA |
520 | } |
521 | ||
905ca191 | 522 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 523 | { |
68f74479 TM |
524 | if (lseg != NULL) { |
525 | struct inode *inode = lseg->pls_layout->plh_inode; | |
526 | NFS_SERVER(inode)->pnfs_curr_ld->free_lseg(lseg); | |
527 | } | |
974cec8c AA |
528 | } |
529 | ||
d684d2ae | 530 | static void |
57036a37 TM |
531 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
532 | struct pnfs_layout_segment *lseg) | |
d684d2ae | 533 | { |
d20581aa | 534 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
d684d2ae | 535 | list_del_init(&lseg->pls_list); |
8f0d27dc | 536 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
2b28a7be | 537 | refcount_dec(&lo->plh_refcount); |
abb3e1c8 TM |
538 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) |
539 | return; | |
7b650994 TM |
540 | if (list_empty(&lo->plh_segs) && |
541 | !test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) && | |
542 | !test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { | |
334a8f37 TM |
543 | if (atomic_read(&lo->plh_outstanding) == 0) |
544 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
173f77e9 | 545 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
2d148c7e | 546 | } |
d684d2ae FI |
547 | } |
548 | ||
68f74479 TM |
549 | static bool |
550 | pnfs_cache_lseg_for_layoutreturn(struct pnfs_layout_hdr *lo, | |
551 | struct pnfs_layout_segment *lseg) | |
552 | { | |
553 | if (test_and_clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && | |
554 | pnfs_layout_is_valid(lo)) { | |
4aab9732 | 555 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); |
68f74479 TM |
556 | list_move_tail(&lseg->pls_list, &lo->plh_return_segs); |
557 | return true; | |
558 | } | |
559 | return false; | |
560 | } | |
561 | ||
bae724ef | 562 | void |
9369a431 | 563 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
974cec8c | 564 | { |
57036a37 | 565 | struct pnfs_layout_hdr *lo; |
d684d2ae FI |
566 | struct inode *inode; |
567 | ||
568 | if (!lseg) | |
569 | return; | |
570 | ||
4541d16c | 571 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
eba6dd69 | 572 | refcount_read(&lseg->pls_refcount), |
4541d16c | 573 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
4ef2e4f8 | 574 | |
57036a37 TM |
575 | lo = lseg->pls_layout; |
576 | inode = lo->plh_inode; | |
4ef2e4f8 | 577 | |
eba6dd69 | 578 | if (refcount_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
faa4a54f TM |
579 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
580 | spin_unlock(&inode->i_lock); | |
581 | return; | |
582 | } | |
8f0d27dc | 583 | pnfs_get_layout_hdr(lo); |
4ef2e4f8 | 584 | pnfs_layout_remove_lseg(lo, lseg); |
68f74479 TM |
585 | if (pnfs_cache_lseg_for_layoutreturn(lo, lseg)) |
586 | lseg = NULL; | |
4ef2e4f8 TM |
587 | spin_unlock(&inode->i_lock); |
588 | pnfs_free_lseg(lseg); | |
589 | pnfs_put_layout_hdr(lo); | |
4541d16c | 590 | } |
4541d16c | 591 | } |
9369a431 | 592 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
974cec8c | 593 | |
fb3296eb BH |
594 | /* |
595 | * is l2 fully contained in l1? | |
596 | * start1 end1 | |
597 | * [----------------------------------) | |
598 | * start2 end2 | |
599 | * [----------------) | |
600 | */ | |
3cb2df17 | 601 | static bool |
7dc0ac70 | 602 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
3cb2df17 | 603 | const struct pnfs_layout_range *l2) |
fb3296eb BH |
604 | { |
605 | u64 start1 = l1->offset; | |
17822b20 | 606 | u64 end1 = pnfs_end_offset(start1, l1->length); |
fb3296eb | 607 | u64 start2 = l2->offset; |
17822b20 | 608 | u64 end2 = pnfs_end_offset(start2, l2->length); |
fb3296eb BH |
609 | |
610 | return (start1 <= start2) && (end1 >= end2); | |
611 | } | |
612 | ||
24956804 TM |
613 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
614 | struct list_head *tmp_list) | |
615 | { | |
eba6dd69 | 616 | if (!refcount_dec_and_test(&lseg->pls_refcount)) |
24956804 TM |
617 | return false; |
618 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); | |
619 | list_add(&lseg->pls_list, tmp_list); | |
620 | return true; | |
621 | } | |
622 | ||
4541d16c FI |
623 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
624 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, | |
625 | struct list_head *tmp_list) | |
626 | { | |
627 | int rv = 0; | |
628 | ||
629 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { | |
630 | /* Remove the reference keeping the lseg in the | |
631 | * list. It will now be removed when all | |
632 | * outstanding io is finished. | |
633 | */ | |
d684d2ae | 634 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
eba6dd69 | 635 | refcount_read(&lseg->pls_refcount)); |
24956804 | 636 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
d684d2ae | 637 | rv = 1; |
4541d16c FI |
638 | } |
639 | return rv; | |
640 | } | |
641 | ||
6d597e17 JL |
642 | /* |
643 | * Compare 2 layout stateid sequence ids, to see which is newer, | |
644 | * taking into account wraparound issues. | |
645 | */ | |
646 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) | |
647 | { | |
648 | return (s32)(s1 - s2) > 0; | |
649 | } | |
650 | ||
e036f464 TM |
651 | static bool |
652 | pnfs_should_free_range(const struct pnfs_layout_range *lseg_range, | |
653 | const struct pnfs_layout_range *recall_range) | |
654 | { | |
655 | return (recall_range->iomode == IOMODE_ANY || | |
656 | lseg_range->iomode == recall_range->iomode) && | |
657 | pnfs_lseg_range_intersecting(lseg_range, recall_range); | |
658 | } | |
659 | ||
660 | static bool | |
661 | pnfs_match_lseg_recall(const struct pnfs_layout_segment *lseg, | |
662 | const struct pnfs_layout_range *recall_range, | |
663 | u32 seq) | |
664 | { | |
665 | if (seq != 0 && pnfs_seqid_is_newer(lseg->pls_seq, seq)) | |
666 | return false; | |
667 | if (recall_range == NULL) | |
668 | return true; | |
669 | return pnfs_should_free_range(&lseg->pls_range, recall_range); | |
670 | } | |
671 | ||
6d597e17 JL |
672 | /** |
673 | * pnfs_mark_matching_lsegs_invalid - tear down lsegs or mark them for later | |
674 | * @lo: layout header containing the lsegs | |
675 | * @tmp_list: list head where doomed lsegs should go | |
676 | * @recall_range: optional recall range argument to match (may be NULL) | |
677 | * @seq: only invalidate lsegs obtained prior to this sequence (may be 0) | |
678 | * | |
679 | * Walk the list of lsegs in the layout header, and tear down any that should | |
680 | * be destroyed. If "recall_range" is specified then the segment must match | |
681 | * that range. If "seq" is non-zero, then only match segments that were handed | |
682 | * out at or before that sequence. | |
683 | * | |
684 | * Returns number of matching invalid lsegs remaining in list after scanning | |
685 | * it and purging them. | |
4541d16c | 686 | */ |
43f1b3da | 687 | int |
49a85061 | 688 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
4541d16c | 689 | struct list_head *tmp_list, |
6d597e17 JL |
690 | const struct pnfs_layout_range *recall_range, |
691 | u32 seq) | |
974cec8c AA |
692 | { |
693 | struct pnfs_layout_segment *lseg, *next; | |
71b39854 | 694 | int remaining = 0; |
974cec8c AA |
695 | |
696 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
697 | ||
8006bfba | 698 | if (list_empty(&lo->plh_segs)) |
38511722 | 699 | return 0; |
4541d16c | 700 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
e036f464 | 701 | if (pnfs_match_lseg_recall(lseg, recall_range, seq)) { |
b3dce6a2 | 702 | dprintk("%s: freeing lseg %p iomode %d seq %u " |
4541d16c | 703 | "offset %llu length %llu\n", __func__, |
6d597e17 JL |
704 | lseg, lseg->pls_range.iomode, lseg->pls_seq, |
705 | lseg->pls_range.offset, lseg->pls_range.length); | |
71b39854 TM |
706 | if (!mark_lseg_invalid(lseg, tmp_list)) |
707 | remaining++; | |
4541d16c | 708 | } |
71b39854 TM |
709 | dprintk("%s:Return %i\n", __func__, remaining); |
710 | return remaining; | |
974cec8c AA |
711 | } |
712 | ||
68f74479 TM |
713 | static void |
714 | pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo, | |
715 | struct list_head *free_me, | |
716 | const struct pnfs_layout_range *range, | |
717 | u32 seq) | |
718 | { | |
719 | struct pnfs_layout_segment *lseg, *next; | |
720 | ||
721 | list_for_each_entry_safe(lseg, next, &lo->plh_return_segs, pls_list) { | |
722 | if (pnfs_match_lseg_recall(lseg, range, seq)) | |
723 | list_move_tail(&lseg->pls_list, free_me); | |
724 | } | |
725 | } | |
726 | ||
f49f9baa | 727 | /* note free_me must contain lsegs from a single layout_hdr */ |
43f1b3da | 728 | void |
4541d16c | 729 | pnfs_free_lseg_list(struct list_head *free_me) |
974cec8c | 730 | { |
4541d16c | 731 | struct pnfs_layout_segment *lseg, *tmp; |
f49f9baa FI |
732 | |
733 | if (list_empty(free_me)) | |
734 | return; | |
735 | ||
4541d16c | 736 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
566052c5 | 737 | list_del(&lseg->pls_list); |
905ca191 | 738 | pnfs_free_lseg(lseg); |
974cec8c AA |
739 | } |
740 | } | |
741 | ||
b6d49ecd | 742 | static struct pnfs_layout_hdr *__pnfs_destroy_layout(struct nfs_inode *nfsi) |
e5e94017 BH |
743 | { |
744 | struct pnfs_layout_hdr *lo; | |
974cec8c | 745 | LIST_HEAD(tmp_list); |
e5e94017 BH |
746 | |
747 | spin_lock(&nfsi->vfs_inode.i_lock); | |
748 | lo = nfsi->layout; | |
749 | if (lo) { | |
3e621214 | 750 | pnfs_get_layout_hdr(lo); |
2454dfea | 751 | pnfs_mark_layout_stateid_invalid(lo, &tmp_list); |
3e621214 TM |
752 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
753 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); | |
754 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
755 | pnfs_free_lseg_list(&tmp_list); | |
1f18b82c | 756 | nfs_commit_inode(&nfsi->vfs_inode, 0); |
3e621214 TM |
757 | pnfs_put_layout_hdr(lo); |
758 | } else | |
759 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
b6d49ecd TM |
760 | return lo; |
761 | } | |
762 | ||
763 | void pnfs_destroy_layout(struct nfs_inode *nfsi) | |
764 | { | |
765 | __pnfs_destroy_layout(nfsi); | |
974cec8c | 766 | } |
041245c8 | 767 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
974cec8c | 768 | |
b6d49ecd TM |
769 | static bool pnfs_layout_removed(struct nfs_inode *nfsi, |
770 | struct pnfs_layout_hdr *lo) | |
771 | { | |
772 | bool ret; | |
773 | ||
774 | spin_lock(&nfsi->vfs_inode.i_lock); | |
775 | ret = nfsi->layout != lo; | |
776 | spin_unlock(&nfsi->vfs_inode.i_lock); | |
777 | return ret; | |
778 | } | |
779 | ||
780 | void pnfs_destroy_layout_final(struct nfs_inode *nfsi) | |
781 | { | |
782 | struct pnfs_layout_hdr *lo = __pnfs_destroy_layout(nfsi); | |
783 | ||
784 | if (lo) | |
785 | wait_var_event(lo, pnfs_layout_removed(nfsi, lo)); | |
786 | } | |
787 | ||
fd9a8d71 TM |
788 | static bool |
789 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, | |
790 | struct list_head *layout_list) | |
974cec8c AA |
791 | { |
792 | struct pnfs_layout_hdr *lo; | |
fd9a8d71 | 793 | bool ret = false; |
974cec8c | 794 | |
fd9a8d71 TM |
795 | spin_lock(&inode->i_lock); |
796 | lo = NFS_I(inode)->layout; | |
797 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { | |
798 | pnfs_get_layout_hdr(lo); | |
799 | list_add(&lo->plh_bulk_destroy, layout_list); | |
800 | ret = true; | |
801 | } | |
802 | spin_unlock(&inode->i_lock); | |
803 | return ret; | |
804 | } | |
805 | ||
806 | /* Caller must hold rcu_read_lock and clp->cl_lock */ | |
807 | static int | |
808 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, | |
809 | struct nfs_server *server, | |
810 | struct list_head *layout_list) | |
5085607d TM |
811 | __must_hold(&clp->cl_lock) |
812 | __must_hold(RCU) | |
fd9a8d71 TM |
813 | { |
814 | struct pnfs_layout_hdr *lo, *next; | |
815 | struct inode *inode; | |
816 | ||
817 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { | |
5085607d TM |
818 | if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || |
819 | test_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags) || | |
820 | !list_empty(&lo->plh_bulk_destroy)) | |
b85f5620 | 821 | continue; |
5085607d TM |
822 | /* If the sb is being destroyed, just bail */ |
823 | if (!nfs_sb_active(server->super)) | |
824 | break; | |
b5fdf841 | 825 | inode = pnfs_grab_inode_layout_hdr(lo); |
5085607d | 826 | if (inode != NULL) { |
cf6605d1 TM |
827 | if (test_and_clear_bit(NFS_LAYOUT_HASHED, &lo->plh_flags)) |
828 | list_del_rcu(&lo->plh_layouts); | |
5085607d TM |
829 | if (pnfs_layout_add_bulk_destroy_list(inode, |
830 | layout_list)) | |
831 | continue; | |
832 | rcu_read_unlock(); | |
833 | spin_unlock(&clp->cl_lock); | |
834 | iput(inode); | |
835 | } else { | |
836 | rcu_read_unlock(); | |
837 | spin_unlock(&clp->cl_lock); | |
5085607d TM |
838 | } |
839 | nfs_sb_deactive(server->super); | |
fd9a8d71 TM |
840 | spin_lock(&clp->cl_lock); |
841 | rcu_read_lock(); | |
842 | return -EAGAIN; | |
843 | } | |
844 | return 0; | |
845 | } | |
846 | ||
847 | static int | |
848 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, | |
849 | bool is_bulk_recall) | |
850 | { | |
851 | struct pnfs_layout_hdr *lo; | |
852 | struct inode *inode; | |
fd9a8d71 TM |
853 | LIST_HEAD(lseg_list); |
854 | int ret = 0; | |
855 | ||
856 | while (!list_empty(layout_list)) { | |
857 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, | |
858 | plh_bulk_destroy); | |
859 | dprintk("%s freeing layout for inode %lu\n", __func__, | |
860 | lo->plh_inode->i_ino); | |
861 | inode = lo->plh_inode; | |
7c5d1875 CH |
862 | |
863 | pnfs_layoutcommit_inode(inode, false); | |
864 | ||
fd9a8d71 TM |
865 | spin_lock(&inode->i_lock); |
866 | list_del_init(&lo->plh_bulk_destroy); | |
9fd4b9fc TM |
867 | if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) { |
868 | if (is_bulk_recall) | |
869 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
fd9a8d71 | 870 | ret = -EAGAIN; |
9fd4b9fc | 871 | } |
fd9a8d71 TM |
872 | spin_unlock(&inode->i_lock); |
873 | pnfs_free_lseg_list(&lseg_list); | |
b20135d0 TM |
874 | /* Free all lsegs that are attached to commit buckets */ |
875 | nfs_commit_inode(inode, 0); | |
fd9a8d71 | 876 | pnfs_put_layout_hdr(lo); |
5085607d | 877 | nfs_iput_and_deactive(inode); |
fd9a8d71 TM |
878 | } |
879 | return ret; | |
880 | } | |
881 | ||
882 | int | |
883 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, | |
884 | struct nfs_fsid *fsid, | |
885 | bool is_recall) | |
886 | { | |
887 | struct nfs_server *server; | |
888 | LIST_HEAD(layout_list); | |
c47abcf8 | 889 | |
974cec8c | 890 | spin_lock(&clp->cl_lock); |
6382a441 | 891 | rcu_read_lock(); |
fd9a8d71 | 892 | restart: |
6382a441 | 893 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
fd9a8d71 TM |
894 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
895 | continue; | |
896 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
897 | server, | |
898 | &layout_list) != 0) | |
899 | goto restart; | |
6382a441 WAA |
900 | } |
901 | rcu_read_unlock(); | |
974cec8c AA |
902 | spin_unlock(&clp->cl_lock); |
903 | ||
fd9a8d71 TM |
904 | if (list_empty(&layout_list)) |
905 | return 0; | |
906 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
907 | } | |
908 | ||
909 | int | |
910 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
911 | bool is_recall) | |
912 | { | |
913 | struct nfs_server *server; | |
914 | LIST_HEAD(layout_list); | |
915 | ||
916 | spin_lock(&clp->cl_lock); | |
917 | rcu_read_lock(); | |
918 | restart: | |
919 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
920 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, | |
921 | server, | |
922 | &layout_list) != 0) | |
923 | goto restart; | |
974cec8c | 924 | } |
fd9a8d71 TM |
925 | rcu_read_unlock(); |
926 | spin_unlock(&clp->cl_lock); | |
927 | ||
928 | if (list_empty(&layout_list)) | |
929 | return 0; | |
930 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); | |
931 | } | |
932 | ||
933 | /* | |
9f266451 | 934 | * Called by the state manager to remove all layouts established under an |
fd9a8d71 TM |
935 | * expired lease. |
936 | */ | |
937 | void | |
938 | pnfs_destroy_all_layouts(struct nfs_client *clp) | |
939 | { | |
940 | nfs4_deviceid_mark_client_invalid(clp); | |
941 | nfs4_deviceid_purge_client(clp); | |
942 | ||
943 | pnfs_destroy_layouts_byclid(clp, false); | |
e5e94017 BH |
944 | } |
945 | ||
59b56394 TM |
946 | static void |
947 | pnfs_set_layout_cred(struct pnfs_layout_hdr *lo, const struct cred *cred) | |
948 | { | |
949 | const struct cred *old; | |
950 | ||
951 | if (cred && cred_fscmp(lo->plh_lc_cred, cred) != 0) { | |
952 | old = xchg(&lo->plh_lc_cred, get_cred(cred)); | |
953 | put_cred(old); | |
954 | } | |
955 | } | |
956 | ||
fd6002e9 | 957 | /* update lo->plh_stateid with new if is more recent */ |
43f1b3da FI |
958 | void |
959 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, | |
59b56394 | 960 | const struct cred *cred, bool update_barrier) |
b1f69b75 | 961 | { |
ecebb80b | 962 | u32 oldseq, newseq, new_barrier = 0; |
b1f69b75 | 963 | |
2d2f24ad TM |
964 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
965 | newseq = be32_to_cpu(new->seqid); | |
2a59a041 TM |
966 | |
967 | if (!pnfs_layout_is_valid(lo)) { | |
59b56394 | 968 | pnfs_set_layout_cred(lo, cred); |
2a59a041 TM |
969 | nfs4_stateid_copy(&lo->plh_stateid, new); |
970 | lo->plh_barrier = newseq; | |
971 | pnfs_clear_layoutreturn_info(lo); | |
972 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); | |
973 | return; | |
974 | } | |
975 | if (pnfs_seqid_is_newer(newseq, oldseq)) { | |
f597c537 | 976 | nfs4_stateid_copy(&lo->plh_stateid, new); |
ecebb80b TM |
977 | /* |
978 | * Because of wraparound, we want to keep the barrier | |
979 | * "close" to the current seqids. | |
980 | */ | |
981 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); | |
43f1b3da | 982 | } |
ecebb80b TM |
983 | if (update_barrier) |
984 | new_barrier = be32_to_cpu(new->seqid); | |
985 | else if (new_barrier == 0) | |
986 | return; | |
2a59a041 | 987 | if (pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
ecebb80b | 988 | lo->plh_barrier = new_barrier; |
b1f69b75 AA |
989 | } |
990 | ||
cf7d63f1 | 991 | static bool |
19c54aba TM |
992 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
993 | const nfs4_stateid *stateid) | |
43f1b3da | 994 | { |
19c54aba | 995 | u32 seqid = be32_to_cpu(stateid->seqid); |
25a1a621 | 996 | |
19c54aba TM |
997 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
998 | } | |
999 | ||
1000 | /* lget is set to 1 if called from inside send_layoutget call chain */ | |
1001 | static bool | |
e1c06f80 | 1002 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo) |
19c54aba | 1003 | { |
f7e8917a | 1004 | return lo->plh_block_lgets || |
e1c06f80 | 1005 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
cf7d63f1 FI |
1006 | } |
1007 | ||
5e36e2a9 FI |
1008 | static struct nfs_server * |
1009 | pnfs_find_server(struct inode *inode, struct nfs_open_context *ctx) | |
1010 | { | |
1011 | struct nfs_server *server; | |
1012 | ||
78746a38 | 1013 | if (inode) { |
5e36e2a9 | 1014 | server = NFS_SERVER(inode); |
78746a38 | 1015 | } else { |
5e36e2a9 FI |
1016 | struct dentry *parent_dir = dget_parent(ctx->dentry); |
1017 | server = NFS_SERVER(parent_dir->d_inode); | |
1018 | dput(parent_dir); | |
1019 | } | |
1020 | return server; | |
1021 | } | |
1022 | ||
29a8bfe5 TM |
1023 | static void nfs4_free_pages(struct page **pages, size_t size) |
1024 | { | |
1025 | int i; | |
1026 | ||
1027 | if (!pages) | |
1028 | return; | |
1029 | ||
1030 | for (i = 0; i < size; i++) { | |
1031 | if (!pages[i]) | |
1032 | break; | |
1033 | __free_page(pages[i]); | |
1034 | } | |
1035 | kfree(pages); | |
1036 | } | |
1037 | ||
1038 | static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) | |
1039 | { | |
1040 | struct page **pages; | |
1041 | int i; | |
1042 | ||
a2791d3a | 1043 | pages = kmalloc_array(size, sizeof(struct page *), gfp_flags); |
29a8bfe5 TM |
1044 | if (!pages) { |
1045 | dprintk("%s: can't alloc array of %zu pages\n", __func__, size); | |
1046 | return NULL; | |
1047 | } | |
1048 | ||
1049 | for (i = 0; i < size; i++) { | |
1050 | pages[i] = alloc_page(gfp_flags); | |
1051 | if (!pages[i]) { | |
1052 | dprintk("%s: failed to allocate page\n", __func__); | |
a2791d3a | 1053 | nfs4_free_pages(pages, i); |
29a8bfe5 TM |
1054 | return NULL; |
1055 | } | |
1056 | } | |
1057 | ||
1058 | return pages; | |
1059 | } | |
1060 | ||
587f03de | 1061 | static struct nfs4_layoutget * |
5e36e2a9 | 1062 | pnfs_alloc_init_layoutget_args(struct inode *ino, |
e5e94017 | 1063 | struct nfs_open_context *ctx, |
2409a976 | 1064 | const nfs4_stateid *stateid, |
e144e539 | 1065 | const struct pnfs_layout_range *range, |
587f03de | 1066 | gfp_t gfp_flags) |
e5e94017 | 1067 | { |
5e36e2a9 | 1068 | struct nfs_server *server = pnfs_find_server(ino, ctx); |
28ced9a8 | 1069 | size_t max_reply_sz = server->pnfs_curr_ld->max_layoutget_response; |
dacb452d | 1070 | size_t max_pages = max_response_pages(server); |
b1f69b75 | 1071 | struct nfs4_layoutget *lgp; |
b1f69b75 AA |
1072 | |
1073 | dprintk("--> %s\n", __func__); | |
e5e94017 | 1074 | |
83026d80 JL |
1075 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
1076 | if (lgp == NULL) | |
587f03de | 1077 | return NULL; |
83026d80 | 1078 | |
28ced9a8 TM |
1079 | if (max_reply_sz) { |
1080 | size_t npages = (max_reply_sz + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
1081 | if (npages < max_pages) | |
1082 | max_pages = npages; | |
1083 | } | |
1084 | ||
dacb452d FI |
1085 | lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); |
1086 | if (!lgp->args.layout.pages) { | |
1087 | kfree(lgp); | |
1088 | return NULL; | |
1089 | } | |
1090 | lgp->args.layout.pglen = max_pages * PAGE_SIZE; | |
1091 | lgp->res.layoutp = &lgp->args.layout; | |
1092 | ||
d49e0d5b TM |
1093 | /* Don't confuse uninitialised result and success */ |
1094 | lgp->res.status = -NFS4ERR_DELAY; | |
83026d80 JL |
1095 | |
1096 | lgp->args.minlength = PAGE_SIZE; | |
1097 | if (lgp->args.minlength > range->length) | |
1098 | lgp->args.minlength = range->length; | |
5e36e2a9 FI |
1099 | if (ino) { |
1100 | loff_t i_size = i_size_read(ino); | |
1101 | ||
1102 | if (range->iomode == IOMODE_READ) { | |
1103 | if (range->offset >= i_size) | |
1104 | lgp->args.minlength = 0; | |
1105 | else if (i_size - range->offset < lgp->args.minlength) | |
1106 | lgp->args.minlength = i_size - range->offset; | |
1107 | } | |
d03ab29d | 1108 | } |
83026d80 JL |
1109 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
1110 | pnfs_copy_range(&lgp->args.range, range); | |
1111 | lgp->args.type = server->pnfs_curr_ld->id; | |
1112 | lgp->args.inode = ino; | |
1113 | lgp->args.ctx = get_nfs_open_context(ctx); | |
183d9e7b | 1114 | nfs4_stateid_copy(&lgp->args.stateid, stateid); |
83026d80 | 1115 | lgp->gfp_flags = gfp_flags; |
63ec2b69 | 1116 | lgp->cred = ctx->cred; |
587f03de | 1117 | return lgp; |
974cec8c AA |
1118 | } |
1119 | ||
29a8bfe5 TM |
1120 | void pnfs_layoutget_free(struct nfs4_layoutget *lgp) |
1121 | { | |
1122 | size_t max_pages = lgp->args.layout.pglen / PAGE_SIZE; | |
1123 | ||
1124 | nfs4_free_pages(lgp->args.layout.pages, max_pages); | |
1125 | if (lgp->args.inode) | |
1126 | pnfs_put_layout_hdr(NFS_I(lgp->args.inode)->layout); | |
29a8bfe5 TM |
1127 | put_nfs_open_context(lgp->args.ctx); |
1128 | kfree(lgp); | |
1129 | } | |
1130 | ||
24956804 TM |
1131 | static void pnfs_clear_layoutcommit(struct inode *inode, |
1132 | struct list_head *head) | |
1133 | { | |
1134 | struct nfs_inode *nfsi = NFS_I(inode); | |
1135 | struct pnfs_layout_segment *lseg, *tmp; | |
1136 | ||
1137 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) | |
1138 | return; | |
1139 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { | |
1140 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) | |
1141 | continue; | |
1142 | pnfs_lseg_dec_and_remove_zero(lseg, head); | |
1143 | } | |
1144 | } | |
1145 | ||
68f74479 | 1146 | void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, |
2a974425 | 1147 | const nfs4_stateid *arg_stateid, |
68f74479 | 1148 | const struct pnfs_layout_range *range, |
68f74479 TM |
1149 | const nfs4_stateid *stateid) |
1150 | { | |
1151 | struct inode *inode = lo->plh_inode; | |
1152 | LIST_HEAD(freeme); | |
1153 | ||
1154 | spin_lock(&inode->i_lock); | |
c18d1e17 | 1155 | if (!pnfs_layout_is_valid(lo) || |
2a974425 TM |
1156 | !nfs4_stateid_match_other(&lo->plh_stateid, arg_stateid)) |
1157 | goto out_unlock; | |
68f74479 | 1158 | if (stateid) { |
2a974425 TM |
1159 | u32 seq = be32_to_cpu(arg_stateid->seqid); |
1160 | ||
68f74479 TM |
1161 | pnfs_mark_matching_lsegs_invalid(lo, &freeme, range, seq); |
1162 | pnfs_free_returned_lsegs(lo, &freeme, range, seq); | |
59b56394 | 1163 | pnfs_set_layout_stateid(lo, stateid, NULL, true); |
68f74479 TM |
1164 | } else |
1165 | pnfs_mark_layout_stateid_invalid(lo, &freeme); | |
2a974425 | 1166 | out_unlock: |
68f74479 TM |
1167 | pnfs_clear_layoutreturn_waitbit(lo); |
1168 | spin_unlock(&inode->i_lock); | |
1169 | pnfs_free_lseg_list(&freeme); | |
1170 | ||
1171 | } | |
1172 | ||
13c13a6a | 1173 | static bool |
e5fd1904 TM |
1174 | pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo, |
1175 | nfs4_stateid *stateid, | |
44ea8dfc | 1176 | const struct cred **cred, |
e5fd1904 | 1177 | enum pnfs_iomode *iomode) |
13c13a6a | 1178 | { |
bf0291dd TM |
1179 | /* Serialise LAYOUTGET/LAYOUTRETURN */ |
1180 | if (atomic_read(&lo->plh_outstanding) != 0) | |
1181 | return false; | |
6604b203 | 1182 | if (test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) |
13c13a6a | 1183 | return false; |
6604b203 | 1184 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); |
13c13a6a | 1185 | pnfs_get_layout_hdr(lo); |
e5fd1904 | 1186 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) { |
44ea8dfc TM |
1187 | nfs4_stateid_copy(stateid, &lo->plh_stateid); |
1188 | *cred = get_cred(lo->plh_lc_cred); | |
1189 | if (lo->plh_return_seq != 0) | |
1190 | stateid->seqid = cpu_to_be32(lo->plh_return_seq); | |
e5fd1904 TM |
1191 | if (iomode != NULL) |
1192 | *iomode = lo->plh_return_iomode; | |
1193 | pnfs_clear_layoutreturn_info(lo); | |
1194 | return true; | |
1195 | } | |
44ea8dfc TM |
1196 | nfs4_stateid_copy(stateid, &lo->plh_stateid); |
1197 | *cred = get_cred(lo->plh_lc_cred); | |
e5fd1904 TM |
1198 | if (iomode != NULL) |
1199 | *iomode = IOMODE_ANY; | |
13c13a6a TM |
1200 | return true; |
1201 | } | |
1202 | ||
828ed9ec TM |
1203 | static void |
1204 | pnfs_init_layoutreturn_args(struct nfs4_layoutreturn_args *args, | |
1205 | struct pnfs_layout_hdr *lo, | |
1206 | const nfs4_stateid *stateid, | |
1207 | enum pnfs_iomode iomode) | |
1208 | { | |
1209 | struct inode *inode = lo->plh_inode; | |
1210 | ||
1211 | args->layout_type = NFS_SERVER(inode)->pnfs_curr_ld->id; | |
1212 | args->inode = inode; | |
1213 | args->range.iomode = iomode; | |
1214 | args->range.offset = 0; | |
1215 | args->range.length = NFS4_MAX_UINT64; | |
1216 | args->layout = lo; | |
1217 | nfs4_stateid_copy(&args->stateid, stateid); | |
1218 | } | |
1219 | ||
f40eb5d0 | 1220 | static int |
44ea8dfc TM |
1221 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, |
1222 | const nfs4_stateid *stateid, | |
1223 | const struct cred **pcred, | |
1224 | enum pnfs_iomode iomode, | |
1225 | bool sync) | |
f40eb5d0 PT |
1226 | { |
1227 | struct inode *ino = lo->plh_inode; | |
287bd3e9 | 1228 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; |
f40eb5d0 | 1229 | struct nfs4_layoutreturn *lrp; |
44ea8dfc | 1230 | const struct cred *cred = *pcred; |
f40eb5d0 PT |
1231 | int status = 0; |
1232 | ||
44ea8dfc | 1233 | *pcred = NULL; |
e4af440a | 1234 | lrp = kzalloc(sizeof(*lrp), GFP_NOFS); |
f40eb5d0 PT |
1235 | if (unlikely(lrp == NULL)) { |
1236 | status = -ENOMEM; | |
1237 | spin_lock(&ino->i_lock); | |
d67ae825 | 1238 | pnfs_clear_layoutreturn_waitbit(lo); |
f40eb5d0 | 1239 | spin_unlock(&ino->i_lock); |
44ea8dfc | 1240 | put_cred(cred); |
f40eb5d0 PT |
1241 | pnfs_put_layout_hdr(lo); |
1242 | goto out; | |
1243 | } | |
1244 | ||
828ed9ec | 1245 | pnfs_init_layoutreturn_args(&lrp->args, lo, stateid, iomode); |
4d796d75 | 1246 | lrp->args.ld_private = &lrp->ld_private; |
f40eb5d0 | 1247 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
44ea8dfc | 1248 | lrp->cred = cred; |
287bd3e9 TM |
1249 | if (ld->prepare_layoutreturn) |
1250 | ld->prepare_layoutreturn(&lrp->args); | |
f40eb5d0 | 1251 | |
6c16605d | 1252 | status = nfs4_proc_layoutreturn(lrp, sync); |
f40eb5d0 PT |
1253 | out: |
1254 | dprintk("<-- %s status: %d\n", __func__, status); | |
1255 | return status; | |
1256 | } | |
1257 | ||
d474f961 TM |
1258 | static bool |
1259 | pnfs_layout_segments_returnable(struct pnfs_layout_hdr *lo, | |
1260 | enum pnfs_iomode iomode, | |
1261 | u32 seq) | |
1262 | { | |
1263 | struct pnfs_layout_range recall_range = { | |
1264 | .length = NFS4_MAX_UINT64, | |
1265 | .iomode = iomode, | |
1266 | }; | |
1267 | return pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs, | |
1268 | &recall_range, seq) != -EBUSY; | |
1269 | } | |
1270 | ||
13c13a6a TM |
1271 | /* Return true if layoutreturn is needed */ |
1272 | static bool | |
1273 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo) | |
1274 | { | |
2370abda | 1275 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a | 1276 | return false; |
d474f961 TM |
1277 | return pnfs_layout_segments_returnable(lo, lo->plh_return_iomode, |
1278 | lo->plh_return_seq); | |
13c13a6a TM |
1279 | } |
1280 | ||
1281 | static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo) | |
1282 | { | |
1283 | struct inode *inode= lo->plh_inode; | |
1284 | ||
2370abda | 1285 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
13c13a6a TM |
1286 | return; |
1287 | spin_lock(&inode->i_lock); | |
1288 | if (pnfs_layout_need_return(lo)) { | |
44ea8dfc | 1289 | const struct cred *cred; |
13c13a6a TM |
1290 | nfs4_stateid stateid; |
1291 | enum pnfs_iomode iomode; | |
1292 | bool send; | |
1293 | ||
44ea8dfc | 1294 | send = pnfs_prepare_layoutreturn(lo, &stateid, &cred, &iomode); |
13c13a6a TM |
1295 | spin_unlock(&inode->i_lock); |
1296 | if (send) { | |
1297 | /* Send an async layoutreturn so we dont deadlock */ | |
44ea8dfc | 1298 | pnfs_send_layoutreturn(lo, &stateid, &cred, iomode, false); |
13c13a6a TM |
1299 | } |
1300 | } else | |
1301 | spin_unlock(&inode->i_lock); | |
1302 | } | |
1303 | ||
293b3b06 AA |
1304 | /* |
1305 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr | |
1306 | * when the layout segment list is empty. | |
1307 | * | |
1308 | * Note that a pnfs_layout_hdr can exist with an empty layout segment | |
1309 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the | |
1310 | * deviceid is marked invalid. | |
1311 | */ | |
cbe82603 BH |
1312 | int |
1313 | _pnfs_return_layout(struct inode *ino) | |
1314 | { | |
1315 | struct pnfs_layout_hdr *lo = NULL; | |
1316 | struct nfs_inode *nfsi = NFS_I(ino); | |
1317 | LIST_HEAD(tmp_list); | |
44ea8dfc | 1318 | const struct cred *cred; |
cbe82603 | 1319 | nfs4_stateid stateid; |
24408f52 | 1320 | int status = 0; |
93b7f7ad | 1321 | bool send, valid_layout; |
cbe82603 | 1322 | |
366d5052 | 1323 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
cbe82603 BH |
1324 | |
1325 | spin_lock(&ino->i_lock); | |
1326 | lo = nfsi->layout; | |
e5929f3c | 1327 | if (!lo) { |
cbe82603 | 1328 | spin_unlock(&ino->i_lock); |
293b3b06 AA |
1329 | dprintk("NFS: %s no layout to return\n", __func__); |
1330 | goto out; | |
cbe82603 | 1331 | } |
cbe82603 | 1332 | /* Reference matched in nfs4_layoutreturn_release */ |
70c3bd2b | 1333 | pnfs_get_layout_hdr(lo); |
24408f52 TM |
1334 | /* Is there an outstanding layoutreturn ? */ |
1335 | if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) { | |
1336 | spin_unlock(&ino->i_lock); | |
1337 | if (wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, | |
1338 | TASK_UNINTERRUPTIBLE)) | |
1339 | goto out_put_layout_hdr; | |
1340 | spin_lock(&ino->i_lock); | |
1341 | } | |
93b7f7ad | 1342 | valid_layout = pnfs_layout_is_valid(lo); |
24956804 | 1343 | pnfs_clear_layoutcommit(ino, &tmp_list); |
6d597e17 | 1344 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL, 0); |
c88953d8 CH |
1345 | |
1346 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
1347 | struct pnfs_layout_range range = { | |
1348 | .iomode = IOMODE_ANY, | |
1349 | .offset = 0, | |
1350 | .length = NFS4_MAX_UINT64, | |
1351 | }; | |
1352 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); | |
1353 | } | |
1354 | ||
293b3b06 | 1355 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
93b7f7ad OK |
1356 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) || |
1357 | !valid_layout) { | |
293b3b06 | 1358 | spin_unlock(&ino->i_lock); |
293b3b06 | 1359 | dprintk("NFS: %s no layout segments to return\n", __func__); |
7bcc1058 | 1360 | goto out_wait_layoutreturn; |
293b3b06 | 1361 | } |
47abadef | 1362 | |
44ea8dfc | 1363 | send = pnfs_prepare_layoutreturn(lo, &stateid, &cred, NULL); |
cbe82603 | 1364 | spin_unlock(&ino->i_lock); |
7f27392c | 1365 | if (send) |
44ea8dfc | 1366 | status = pnfs_send_layoutreturn(lo, &stateid, &cred, IOMODE_ANY, true); |
7bcc1058 TM |
1367 | out_wait_layoutreturn: |
1368 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, TASK_UNINTERRUPTIBLE); | |
7f27392c | 1369 | out_put_layout_hdr: |
ee6625a9 | 1370 | pnfs_free_lseg_list(&tmp_list); |
7f27392c | 1371 | pnfs_put_layout_hdr(lo); |
cbe82603 BH |
1372 | out: |
1373 | dprintk("<-- %s status: %d\n", __func__, status); | |
1374 | return status; | |
1375 | } | |
1376 | ||
24028672 TM |
1377 | int |
1378 | pnfs_commit_and_return_layout(struct inode *inode) | |
1379 | { | |
1380 | struct pnfs_layout_hdr *lo; | |
1381 | int ret; | |
1382 | ||
1383 | spin_lock(&inode->i_lock); | |
1384 | lo = NFS_I(inode)->layout; | |
1385 | if (lo == NULL) { | |
1386 | spin_unlock(&inode->i_lock); | |
1387 | return 0; | |
1388 | } | |
1389 | pnfs_get_layout_hdr(lo); | |
1390 | /* Block new layoutgets and read/write to ds */ | |
1391 | lo->plh_block_lgets++; | |
1392 | spin_unlock(&inode->i_lock); | |
1393 | filemap_fdatawait(inode->i_mapping); | |
1394 | ret = pnfs_layoutcommit_inode(inode, true); | |
1395 | if (ret == 0) | |
1396 | ret = _pnfs_return_layout(inode); | |
1397 | spin_lock(&inode->i_lock); | |
1398 | lo->plh_block_lgets--; | |
1399 | spin_unlock(&inode->i_lock); | |
1400 | pnfs_put_layout_hdr(lo); | |
1401 | return ret; | |
1402 | } | |
1403 | ||
1c5bd76d TM |
1404 | bool pnfs_roc(struct inode *ino, |
1405 | struct nfs4_layoutreturn_args *args, | |
1406 | struct nfs4_layoutreturn_res *res, | |
a52458b4 | 1407 | const struct cred *cred) |
f7e8917a | 1408 | { |
40dd4b7a TM |
1409 | struct nfs_inode *nfsi = NFS_I(ino); |
1410 | struct nfs_open_context *ctx; | |
1411 | struct nfs4_state *state; | |
f7e8917a | 1412 | struct pnfs_layout_hdr *lo; |
1c5bd76d | 1413 | struct pnfs_layout_segment *lseg, *next; |
44ea8dfc | 1414 | const struct cred *lc_cred; |
193e3aa2 | 1415 | nfs4_stateid stateid; |
1c5bd76d TM |
1416 | enum pnfs_iomode iomode = 0; |
1417 | bool layoutreturn = false, roc = false; | |
e71708d4 | 1418 | bool skip_read = false; |
f7e8917a | 1419 | |
1c5bd76d TM |
1420 | if (!nfs_have_layout(ino)) |
1421 | return false; | |
29ade5db | 1422 | retry: |
0de43976 | 1423 | rcu_read_lock(); |
f7e8917a | 1424 | spin_lock(&ino->i_lock); |
40dd4b7a | 1425 | lo = nfsi->layout; |
0cdc329e | 1426 | if (!lo || !pnfs_layout_is_valid(lo) || |
9c6376eb TM |
1427 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
1428 | lo = NULL; | |
40dd4b7a | 1429 | goto out_noroc; |
9c6376eb TM |
1430 | } |
1431 | pnfs_get_layout_hdr(lo); | |
29ade5db | 1432 | if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) { |
29ade5db | 1433 | spin_unlock(&ino->i_lock); |
0de43976 | 1434 | rcu_read_unlock(); |
29ade5db TM |
1435 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, |
1436 | TASK_UNINTERRUPTIBLE); | |
1437 | pnfs_put_layout_hdr(lo); | |
1438 | goto retry; | |
1439 | } | |
40dd4b7a | 1440 | |
e755d638 | 1441 | /* no roc if we hold a delegation */ |
e71708d4 TM |
1442 | if (nfs4_check_delegation(ino, FMODE_READ)) { |
1443 | if (nfs4_check_delegation(ino, FMODE_WRITE)) | |
1444 | goto out_noroc; | |
1445 | skip_read = true; | |
1446 | } | |
40dd4b7a | 1447 | |
0de43976 | 1448 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { |
40dd4b7a | 1449 | state = ctx->state; |
e71708d4 TM |
1450 | if (state == NULL) |
1451 | continue; | |
40dd4b7a | 1452 | /* Don't return layout if there is open file state */ |
e71708d4 | 1453 | if (state->state & FMODE_WRITE) |
40dd4b7a | 1454 | goto out_noroc; |
e71708d4 TM |
1455 | if (state->state & FMODE_READ) |
1456 | skip_read = true; | |
40dd4b7a TM |
1457 | } |
1458 | ||
e755d638 | 1459 | |
1c5bd76d | 1460 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) { |
e71708d4 TM |
1461 | if (skip_read && lseg->pls_range.iomode == IOMODE_READ) |
1462 | continue; | |
e755d638 | 1463 | /* If we are sending layoutreturn, invalidate all valid lsegs */ |
1c5bd76d TM |
1464 | if (!test_and_clear_bit(NFS_LSEG_ROC, &lseg->pls_flags)) |
1465 | continue; | |
1466 | /* | |
1467 | * Note: mark lseg for return so pnfs_layout_remove_lseg | |
1468 | * doesn't invalidate the layout for us. | |
1469 | */ | |
1470 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); | |
1471 | if (!mark_lseg_invalid(lseg, &lo->plh_return_segs)) | |
1472 | continue; | |
1473 | pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0); | |
69820d22 TM |
1474 | } |
1475 | ||
1c5bd76d TM |
1476 | if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) |
1477 | goto out_noroc; | |
69820d22 | 1478 | |
500d701f | 1479 | /* ROC in two conditions: |
e755d638 PT |
1480 | * 1. there are ROC lsegs |
1481 | * 2. we don't send layoutreturn | |
e755d638 | 1482 | */ |
1c5bd76d | 1483 | /* lo ref dropped in pnfs_roc_release() */ |
44ea8dfc | 1484 | layoutreturn = pnfs_prepare_layoutreturn(lo, &stateid, &lc_cred, &iomode); |
1c5bd76d | 1485 | /* If the creds don't match, we can't compound the layoutreturn */ |
4d8948c7 | 1486 | if (!layoutreturn || cred_fscmp(cred, lc_cred) != 0) |
1c5bd76d TM |
1487 | goto out_noroc; |
1488 | ||
1489 | roc = layoutreturn; | |
1490 | pnfs_init_layoutreturn_args(args, lo, &stateid, iomode); | |
1491 | res->lrs_present = 0; | |
1492 | layoutreturn = false; | |
44ea8dfc | 1493 | put_cred(lc_cred); |
4d8948c7 | 1494 | |
40dd4b7a | 1495 | out_noroc: |
f7e8917a | 1496 | spin_unlock(&ino->i_lock); |
0de43976 | 1497 | rcu_read_unlock(); |
e755d638 | 1498 | pnfs_layoutcommit_inode(ino, true); |
287bd3e9 TM |
1499 | if (roc) { |
1500 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; | |
1501 | if (ld->prepare_layoutreturn) | |
1502 | ld->prepare_layoutreturn(args); | |
9c6376eb | 1503 | pnfs_put_layout_hdr(lo); |
287bd3e9 TM |
1504 | return true; |
1505 | } | |
e755d638 | 1506 | if (layoutreturn) |
44ea8dfc | 1507 | pnfs_send_layoutreturn(lo, &stateid, &lc_cred, iomode, true); |
9c6376eb | 1508 | pnfs_put_layout_hdr(lo); |
287bd3e9 | 1509 | return false; |
f7e8917a FI |
1510 | } |
1511 | ||
078000d0 TM |
1512 | int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, |
1513 | struct nfs4_layoutreturn_res **respp, int *ret) | |
287a9c55 TM |
1514 | { |
1515 | struct nfs4_layoutreturn_args *arg = *argpp; | |
1516 | int retval = -EAGAIN; | |
1517 | ||
1518 | if (!arg) | |
1519 | return 0; | |
1520 | /* Handle Layoutreturn errors */ | |
1521 | switch (*ret) { | |
1522 | case 0: | |
1523 | retval = 0; | |
1524 | break; | |
6109bcf7 TM |
1525 | case -NFS4ERR_NOMATCHING_LAYOUT: |
1526 | /* Was there an RPC level error? If not, retry */ | |
1527 | if (task->tk_rpc_status == 0) | |
1528 | break; | |
1529 | /* If the call was not sent, let caller handle it */ | |
1530 | if (!RPC_WAS_SENT(task)) | |
1531 | return 0; | |
1532 | /* | |
1533 | * Otherwise, assume the call succeeded and | |
1534 | * that we need to release the layout | |
1535 | */ | |
1536 | *ret = 0; | |
1537 | (*respp)->lrs_present = 0; | |
1538 | retval = 0; | |
1539 | break; | |
078a432d TM |
1540 | case -NFS4ERR_DELAY: |
1541 | /* Let the caller handle the retry */ | |
1542 | *ret = -NFS4ERR_NOMATCHING_LAYOUT; | |
1543 | return 0; | |
287a9c55 | 1544 | case -NFS4ERR_OLD_STATEID: |
30cb3ee2 | 1545 | if (!nfs4_layout_refresh_old_stateid(&arg->stateid, |
078000d0 | 1546 | &arg->range, arg->inode)) |
287a9c55 TM |
1547 | break; |
1548 | *ret = -NFS4ERR_NOMATCHING_LAYOUT; | |
1549 | return -EAGAIN; | |
1550 | } | |
1551 | *argpp = NULL; | |
1552 | *respp = NULL; | |
1553 | return retval; | |
1554 | } | |
1555 | ||
1c5bd76d TM |
1556 | void pnfs_roc_release(struct nfs4_layoutreturn_args *args, |
1557 | struct nfs4_layoutreturn_res *res, | |
1558 | int ret) | |
f7e8917a | 1559 | { |
1c5bd76d | 1560 | struct pnfs_layout_hdr *lo = args->layout; |
67bbceed | 1561 | struct inode *inode = args->inode; |
1c5bd76d | 1562 | const nfs4_stateid *res_stateid = NULL; |
287bd3e9 | 1563 | struct nfs4_xdr_opaque_data *ld_private = args->ld_private; |
f7e8917a | 1564 | |
9c47b18c TM |
1565 | switch (ret) { |
1566 | case -NFS4ERR_NOMATCHING_LAYOUT: | |
67bbceed TM |
1567 | spin_lock(&inode->i_lock); |
1568 | if (pnfs_layout_is_valid(lo) && | |
1569 | nfs4_stateid_match_other(&args->stateid, &lo->plh_stateid)) | |
1570 | pnfs_set_plh_return_info(lo, args->range.iomode, 0); | |
c18d1e17 | 1571 | pnfs_clear_layoutreturn_waitbit(lo); |
67bbceed | 1572 | spin_unlock(&inode->i_lock); |
9c47b18c TM |
1573 | break; |
1574 | case 0: | |
1c5bd76d TM |
1575 | if (res->lrs_present) |
1576 | res_stateid = &res->stateid; | |
df561f66 | 1577 | fallthrough; |
9c47b18c | 1578 | default: |
c18d1e17 TM |
1579 | pnfs_layoutreturn_free_lsegs(lo, &args->stateid, &args->range, |
1580 | res_stateid); | |
1c5bd76d | 1581 | } |
a19b4785 | 1582 | trace_nfs4_layoutreturn_on_close(args->inode, &args->stateid, ret); |
287bd3e9 TM |
1583 | if (ld_private && ld_private->ops && ld_private->ops->free) |
1584 | ld_private->ops->free(ld_private); | |
1c5bd76d | 1585 | pnfs_put_layout_hdr(lo); |
f7e8917a FI |
1586 | } |
1587 | ||
500d701f PT |
1588 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
1589 | { | |
1590 | struct nfs_inode *nfsi = NFS_I(ino); | |
1591 | struct pnfs_layout_hdr *lo; | |
1592 | bool sleep = false; | |
1593 | ||
1594 | /* we might not have grabbed lo reference. so need to check under | |
1595 | * i_lock */ | |
1596 | spin_lock(&ino->i_lock); | |
1597 | lo = nfsi->layout; | |
ee284e35 TM |
1598 | if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { |
1599 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); | |
500d701f | 1600 | sleep = true; |
ee284e35 | 1601 | } |
500d701f | 1602 | spin_unlock(&ino->i_lock); |
500d701f PT |
1603 | return sleep; |
1604 | } | |
1605 | ||
b1f69b75 AA |
1606 | /* |
1607 | * Compare two layout segments for sorting into layout cache. | |
1608 | * We want to preferentially return RW over RO layouts, so ensure those | |
1609 | * are seen first. | |
1610 | */ | |
1611 | static s64 | |
7dc0ac70 | 1612 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
3cb2df17 | 1613 | const struct pnfs_layout_range *l2) |
b1f69b75 | 1614 | { |
fb3296eb BH |
1615 | s64 d; |
1616 | ||
1617 | /* high offset > low offset */ | |
1618 | d = l1->offset - l2->offset; | |
1619 | if (d) | |
1620 | return d; | |
1621 | ||
1622 | /* short length > long length */ | |
1623 | d = l2->length - l1->length; | |
1624 | if (d) | |
1625 | return d; | |
1626 | ||
b1f69b75 | 1627 | /* read > read/write */ |
fb3296eb | 1628 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
b1f69b75 AA |
1629 | } |
1630 | ||
03772d2f TM |
1631 | static bool |
1632 | pnfs_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
1633 | const struct pnfs_layout_range *l2) | |
1634 | { | |
1635 | return pnfs_lseg_range_cmp(l1, l2) > 0; | |
1636 | } | |
1637 | ||
1638 | static bool | |
1639 | pnfs_lseg_no_merge(struct pnfs_layout_segment *lseg, | |
1640 | struct pnfs_layout_segment *old) | |
1641 | { | |
1642 | return false; | |
1643 | } | |
1644 | ||
1645 | void | |
1646 | pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1647 | struct pnfs_layout_segment *lseg, | |
1648 | bool (*is_after)(const struct pnfs_layout_range *, | |
1649 | const struct pnfs_layout_range *), | |
1650 | bool (*do_merge)(struct pnfs_layout_segment *, | |
1651 | struct pnfs_layout_segment *), | |
1652 | struct list_head *free_me) | |
974cec8c | 1653 | { |
03772d2f | 1654 | struct pnfs_layout_segment *lp, *tmp; |
b1f69b75 | 1655 | |
974cec8c AA |
1656 | dprintk("%s:Begin\n", __func__); |
1657 | ||
03772d2f TM |
1658 | list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) { |
1659 | if (test_bit(NFS_LSEG_VALID, &lp->pls_flags) == 0) | |
1660 | continue; | |
1661 | if (do_merge(lseg, lp)) { | |
1662 | mark_lseg_invalid(lp, free_me); | |
1663 | continue; | |
1664 | } | |
1665 | if (is_after(&lseg->pls_range, &lp->pls_range)) | |
b1f69b75 | 1666 | continue; |
566052c5 | 1667 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
b1f69b75 AA |
1668 | dprintk("%s: inserted lseg %p " |
1669 | "iomode %d offset %llu length %llu before " | |
1670 | "lp %p iomode %d offset %llu length %llu\n", | |
566052c5 FI |
1671 | __func__, lseg, lseg->pls_range.iomode, |
1672 | lseg->pls_range.offset, lseg->pls_range.length, | |
1673 | lp, lp->pls_range.iomode, lp->pls_range.offset, | |
1674 | lp->pls_range.length); | |
fb3296eb | 1675 | goto out; |
974cec8c | 1676 | } |
fb3296eb BH |
1677 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
1678 | dprintk("%s: inserted lseg %p " | |
1679 | "iomode %d offset %llu length %llu at tail\n", | |
1680 | __func__, lseg, lseg->pls_range.iomode, | |
1681 | lseg->pls_range.offset, lseg->pls_range.length); | |
1682 | out: | |
70c3bd2b | 1683 | pnfs_get_layout_hdr(lo); |
974cec8c AA |
1684 | |
1685 | dprintk("%s:Return\n", __func__); | |
e5e94017 | 1686 | } |
03772d2f TM |
1687 | EXPORT_SYMBOL_GPL(pnfs_generic_layout_insert_lseg); |
1688 | ||
1689 | static void | |
1690 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, | |
1691 | struct pnfs_layout_segment *lseg, | |
1692 | struct list_head *free_me) | |
1693 | { | |
1694 | struct inode *inode = lo->plh_inode; | |
1695 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
1696 | ||
1697 | if (ld->add_lseg != NULL) | |
1698 | ld->add_lseg(lo, lseg, free_me); | |
1699 | else | |
1700 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
1701 | pnfs_lseg_range_is_after, | |
1702 | pnfs_lseg_no_merge, | |
1703 | free_me); | |
1704 | } | |
e5e94017 BH |
1705 | |
1706 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1707 | alloc_init_layout_hdr(struct inode *ino, |
1708 | struct nfs_open_context *ctx, | |
1709 | gfp_t gfp_flags) | |
e5e94017 BH |
1710 | { |
1711 | struct pnfs_layout_hdr *lo; | |
1712 | ||
636fb9c8 | 1713 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
e5e94017 BH |
1714 | if (!lo) |
1715 | return NULL; | |
2b28a7be | 1716 | refcount_set(&lo->plh_refcount, 1); |
b7edfaa1 FI |
1717 | INIT_LIST_HEAD(&lo->plh_layouts); |
1718 | INIT_LIST_HEAD(&lo->plh_segs); | |
68f74479 | 1719 | INIT_LIST_HEAD(&lo->plh_return_segs); |
fd9a8d71 | 1720 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
b7edfaa1 | 1721 | lo->plh_inode = ino; |
a52458b4 | 1722 | lo->plh_lc_cred = get_cred(ctx->cred); |
67a3b721 | 1723 | lo->plh_flags |= 1 << NFS_LAYOUT_INVALID_STID; |
e5e94017 BH |
1724 | return lo; |
1725 | } | |
1726 | ||
1727 | static struct pnfs_layout_hdr * | |
9fa40758 PT |
1728 | pnfs_find_alloc_layout(struct inode *ino, |
1729 | struct nfs_open_context *ctx, | |
1730 | gfp_t gfp_flags) | |
e5241e43 TM |
1731 | __releases(&ino->i_lock) |
1732 | __acquires(&ino->i_lock) | |
e5e94017 BH |
1733 | { |
1734 | struct nfs_inode *nfsi = NFS_I(ino); | |
1735 | struct pnfs_layout_hdr *new = NULL; | |
1736 | ||
1737 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); | |
1738 | ||
251ec410 TM |
1739 | if (nfsi->layout != NULL) |
1740 | goto out_existing; | |
e5e94017 | 1741 | spin_unlock(&ino->i_lock); |
9fa40758 | 1742 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
e5e94017 BH |
1743 | spin_lock(&ino->i_lock); |
1744 | ||
251ec410 | 1745 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
e5e94017 | 1746 | nfsi->layout = new; |
251ec410 | 1747 | return new; |
7175fe90 YN |
1748 | } else if (new != NULL) |
1749 | pnfs_free_layout_hdr(new); | |
251ec410 TM |
1750 | out_existing: |
1751 | pnfs_get_layout_hdr(nfsi->layout); | |
e5e94017 BH |
1752 | return nfsi->layout; |
1753 | } | |
1754 | ||
b1f69b75 AA |
1755 | /* |
1756 | * iomode matching rules: | |
c7d73af2 TH |
1757 | * iomode lseg strict match |
1758 | * iomode | |
1759 | * ----- ----- ------ ----- | |
1760 | * ANY READ N/A true | |
1761 | * ANY RW N/A true | |
1762 | * RW READ N/A false | |
1763 | * RW RW N/A true | |
1764 | * READ READ N/A true | |
1765 | * READ RW true false | |
1766 | * READ RW false true | |
b1f69b75 | 1767 | */ |
3cb2df17 | 1768 | static bool |
7dc0ac70 | 1769 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
c7d73af2 TH |
1770 | const struct pnfs_layout_range *range, |
1771 | bool strict_iomode) | |
b1f69b75 | 1772 | { |
fb3296eb BH |
1773 | struct pnfs_layout_range range1; |
1774 | ||
1775 | if ((range->iomode == IOMODE_RW && | |
1776 | ls_range->iomode != IOMODE_RW) || | |
c7d73af2 | 1777 | (range->iomode != ls_range->iomode && |
6089dd0d | 1778 | strict_iomode) || |
7dc0ac70 | 1779 | !pnfs_lseg_range_intersecting(ls_range, range)) |
10db5b7a | 1780 | return false; |
fb3296eb BH |
1781 | |
1782 | /* range1 covers only the first byte in the range */ | |
1783 | range1 = *range; | |
1784 | range1.length = 1; | |
7dc0ac70 | 1785 | return pnfs_lseg_range_contained(ls_range, &range1); |
b1f69b75 AA |
1786 | } |
1787 | ||
1788 | /* | |
1789 | * lookup range in layout | |
1790 | */ | |
e5e94017 | 1791 | static struct pnfs_layout_segment * |
fb3296eb | 1792 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
c7d73af2 TH |
1793 | struct pnfs_layout_range *range, |
1794 | bool strict_iomode) | |
e5e94017 | 1795 | { |
b1f69b75 AA |
1796 | struct pnfs_layout_segment *lseg, *ret = NULL; |
1797 | ||
1798 | dprintk("%s:Begin\n", __func__); | |
1799 | ||
b7edfaa1 | 1800 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
4541d16c | 1801 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
c7d73af2 TH |
1802 | pnfs_lseg_range_match(&lseg->pls_range, range, |
1803 | strict_iomode)) { | |
9369a431 | 1804 | ret = pnfs_get_lseg(lseg); |
b1f69b75 AA |
1805 | break; |
1806 | } | |
b1f69b75 AA |
1807 | } |
1808 | ||
1809 | dprintk("%s:Return lseg %p ref %d\n", | |
eba6dd69 | 1810 | __func__, ret, ret ? refcount_read(&ret->pls_refcount) : 0); |
b1f69b75 | 1811 | return ret; |
e5e94017 BH |
1812 | } |
1813 | ||
d23d61c8 AA |
1814 | /* |
1815 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go | |
1816 | * to the MDS or over pNFS | |
1817 | * | |
1818 | * The nfs_inode read_io and write_io fields are cumulative counters reset | |
1819 | * when there are no layout segments. Note that in pnfs_update_layout iomode | |
1820 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a | |
1821 | * WRITE request. | |
1822 | * | |
1823 | * A return of true means use MDS I/O. | |
1824 | * | |
1825 | * From rfc 5661: | |
1826 | * If a file's size is smaller than the file size threshold, data accesses | |
1827 | * SHOULD be sent to the metadata server. If an I/O request has a length that | |
1828 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata | |
1829 | * server. If both file size and I/O size are provided, the client SHOULD | |
1830 | * reach or exceed both thresholds before sending its read or write | |
1831 | * requests to the data server. | |
1832 | */ | |
1833 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, | |
1834 | struct inode *ino, int iomode) | |
1835 | { | |
1836 | struct nfs4_threshold *t = ctx->mdsthreshold; | |
1837 | struct nfs_inode *nfsi = NFS_I(ino); | |
1838 | loff_t fsize = i_size_read(ino); | |
1839 | bool size = false, size_set = false, io = false, io_set = false, ret = false; | |
1840 | ||
1841 | if (t == NULL) | |
1842 | return ret; | |
1843 | ||
1844 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", | |
1845 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); | |
1846 | ||
1847 | switch (iomode) { | |
1848 | case IOMODE_READ: | |
1849 | if (t->bm & THRESHOLD_RD) { | |
1850 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1851 | size_set = true; | |
1852 | if (fsize < t->rd_sz) | |
1853 | size = true; | |
1854 | } | |
1855 | if (t->bm & THRESHOLD_RD_IO) { | |
1856 | dprintk("%s nfsi->read_io %llu\n", __func__, | |
1857 | nfsi->read_io); | |
1858 | io_set = true; | |
1859 | if (nfsi->read_io < t->rd_io_sz) | |
1860 | io = true; | |
1861 | } | |
1862 | break; | |
1863 | case IOMODE_RW: | |
1864 | if (t->bm & THRESHOLD_WR) { | |
1865 | dprintk("%s fsize %llu\n", __func__, fsize); | |
1866 | size_set = true; | |
1867 | if (fsize < t->wr_sz) | |
1868 | size = true; | |
1869 | } | |
1870 | if (t->bm & THRESHOLD_WR_IO) { | |
1871 | dprintk("%s nfsi->write_io %llu\n", __func__, | |
1872 | nfsi->write_io); | |
1873 | io_set = true; | |
1874 | if (nfsi->write_io < t->wr_io_sz) | |
1875 | io = true; | |
1876 | } | |
1877 | break; | |
1878 | } | |
1879 | if (size_set && io_set) { | |
1880 | if (size && io) | |
1881 | ret = true; | |
1882 | } else if (size || io) | |
1883 | ret = true; | |
1884 | ||
1885 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); | |
1886 | return ret; | |
1887 | } | |
1888 | ||
d03360aa | 1889 | static int pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) |
aa8a45ee PT |
1890 | { |
1891 | /* | |
1892 | * send layoutcommit as it can hold up layoutreturn due to lseg | |
1893 | * reference | |
1894 | */ | |
1895 | pnfs_layoutcommit_inode(lo->plh_inode, false); | |
d03360aa | 1896 | return wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN, |
2e5b29f0 | 1897 | nfs_wait_bit_killable, |
d03360aa | 1898 | TASK_KILLABLE); |
aa8a45ee PT |
1899 | } |
1900 | ||
411ae722 TM |
1901 | static void nfs_layoutget_begin(struct pnfs_layout_hdr *lo) |
1902 | { | |
1903 | atomic_inc(&lo->plh_outstanding); | |
1904 | } | |
1905 | ||
1906 | static void nfs_layoutget_end(struct pnfs_layout_hdr *lo) | |
1907 | { | |
1908 | if (atomic_dec_and_test(&lo->plh_outstanding)) | |
1909 | wake_up_var(&lo->plh_outstanding); | |
1910 | } | |
1911 | ||
d67ae825 TH |
1912 | static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) |
1913 | { | |
1914 | unsigned long *bitlock = &lo->plh_flags; | |
1915 | ||
1916 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); | |
1917 | smp_mb__after_atomic(); | |
1918 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); | |
1919 | } | |
1920 | ||
78746a38 FI |
1921 | static void _add_to_server_list(struct pnfs_layout_hdr *lo, |
1922 | struct nfs_server *server) | |
1923 | { | |
cf6605d1 | 1924 | if (!test_and_set_bit(NFS_LAYOUT_HASHED, &lo->plh_flags)) { |
78746a38 FI |
1925 | struct nfs_client *clp = server->nfs_client; |
1926 | ||
1927 | /* The lo must be on the clp list if there is any | |
1928 | * chance of a CB_LAYOUTRECALL(FILE) coming in. | |
1929 | */ | |
1930 | spin_lock(&clp->cl_lock); | |
cf6605d1 | 1931 | list_add_tail_rcu(&lo->plh_layouts, &server->layouts); |
78746a38 FI |
1932 | spin_unlock(&clp->cl_lock); |
1933 | } | |
1934 | } | |
1935 | ||
e5e94017 BH |
1936 | /* |
1937 | * Layout segment is retreived from the server if not cached. | |
1938 | * The appropriate layout segment is referenced and returned to the caller. | |
1939 | */ | |
7c24d948 | 1940 | struct pnfs_layout_segment * |
e5e94017 BH |
1941 | pnfs_update_layout(struct inode *ino, |
1942 | struct nfs_open_context *ctx, | |
fb3296eb BH |
1943 | loff_t pos, |
1944 | u64 count, | |
a75b9df9 | 1945 | enum pnfs_iomode iomode, |
c7d73af2 | 1946 | bool strict_iomode, |
a75b9df9 | 1947 | gfp_t gfp_flags) |
e5e94017 | 1948 | { |
fb3296eb BH |
1949 | struct pnfs_layout_range arg = { |
1950 | .iomode = iomode, | |
1951 | .offset = pos, | |
1952 | .length = count, | |
1953 | }; | |
70d2f7b1 | 1954 | unsigned pg_offset; |
6382a441 WAA |
1955 | struct nfs_server *server = NFS_SERVER(ino); |
1956 | struct nfs_client *clp = server->nfs_client; | |
183d9e7b | 1957 | struct pnfs_layout_hdr *lo = NULL; |
e5e94017 | 1958 | struct pnfs_layout_segment *lseg = NULL; |
587f03de | 1959 | struct nfs4_layoutget *lgp; |
183d9e7b JL |
1960 | nfs4_stateid stateid; |
1961 | long timeout = 0; | |
66b53f32 | 1962 | unsigned long giveup = jiffies + (clp->cl_lease_time << 1); |
30005121 | 1963 | bool first; |
e5e94017 | 1964 | |
9a4bf31d | 1965 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) { |
183d9e7b | 1966 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1967 | PNFS_UPDATE_LAYOUT_NO_PNFS); |
f86bbcf8 | 1968 | goto out; |
9a4bf31d | 1969 | } |
d23d61c8 | 1970 | |
9a4bf31d | 1971 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { |
183d9e7b | 1972 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1973 | PNFS_UPDATE_LAYOUT_MDSTHRESH); |
f86bbcf8 | 1974 | goto out; |
9a4bf31d | 1975 | } |
d23d61c8 | 1976 | |
9bf87482 | 1977 | lookup_again: |
d03360aa TM |
1978 | lseg = ERR_PTR(nfs4_client_recover_expired_lease(clp)); |
1979 | if (IS_ERR(lseg)) | |
1980 | goto out; | |
9bf87482 | 1981 | first = false; |
e5e94017 | 1982 | spin_lock(&ino->i_lock); |
9fa40758 | 1983 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
830ffb56 TM |
1984 | if (lo == NULL) { |
1985 | spin_unlock(&ino->i_lock); | |
183d9e7b | 1986 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1987 | PNFS_UPDATE_LAYOUT_NOMEM); |
830ffb56 TM |
1988 | goto out; |
1989 | } | |
e5e94017 | 1990 | |
43f1b3da | 1991 | /* Do we even need to bother with this? */ |
a59c30ac | 1992 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
183d9e7b | 1993 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 1994 | PNFS_UPDATE_LAYOUT_BULK_RECALL); |
43f1b3da | 1995 | dprintk("%s matches recall, use MDS\n", __func__); |
e5e94017 BH |
1996 | goto out_unlock; |
1997 | } | |
1998 | ||
1999 | /* if LAYOUTGET already failed once we don't try again */ | |
2e5b29f0 | 2000 | if (pnfs_layout_io_test_failed(lo, iomode)) { |
183d9e7b | 2001 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 2002 | PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); |
e5e94017 | 2003 | goto out_unlock; |
9a4bf31d | 2004 | } |
e5e94017 | 2005 | |
411ae722 TM |
2006 | /* |
2007 | * If the layout segment list is empty, but there are outstanding | |
2008 | * layoutget calls, then they might be subject to a layoutrecall. | |
2009 | */ | |
2010 | if (list_empty(&lo->plh_segs) && | |
2011 | atomic_read(&lo->plh_outstanding) != 0) { | |
2012 | spin_unlock(&ino->i_lock); | |
d03360aa | 2013 | lseg = ERR_PTR(wait_var_event_killable(&lo->plh_outstanding, |
400417b0 | 2014 | !atomic_read(&lo->plh_outstanding))); |
58bbeab4 | 2015 | if (IS_ERR(lseg)) |
411ae722 TM |
2016 | goto out_put_layout_hdr; |
2017 | pnfs_put_layout_hdr(lo); | |
2018 | goto lookup_again; | |
2019 | } | |
2020 | ||
2c8d5fc3 TM |
2021 | /* |
2022 | * Because we free lsegs when sending LAYOUTRETURN, we need to wait | |
2023 | * for LAYOUTRETURN. | |
2024 | */ | |
2025 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) { | |
2026 | spin_unlock(&ino->i_lock); | |
2027 | dprintk("%s wait for layoutreturn\n", __func__); | |
2028 | lseg = ERR_PTR(pnfs_prepare_to_retry_layoutget(lo)); | |
2029 | if (!IS_ERR(lseg)) { | |
2030 | pnfs_put_layout_hdr(lo); | |
2031 | dprintk("%s retrying\n", __func__); | |
2032 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, | |
2033 | lseg, | |
2034 | PNFS_UPDATE_LAYOUT_RETRY); | |
2035 | goto lookup_again; | |
2036 | } | |
2037 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
2038 | PNFS_UPDATE_LAYOUT_RETURN); | |
2039 | goto out_put_layout_hdr; | |
2040 | } | |
2041 | ||
c7d73af2 | 2042 | lseg = pnfs_find_lseg(lo, &arg, strict_iomode); |
183d9e7b JL |
2043 | if (lseg) { |
2044 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, | |
2045 | PNFS_UPDATE_LAYOUT_FOUND_CACHED); | |
2046 | goto out_unlock; | |
2047 | } | |
2048 | ||
183d9e7b JL |
2049 | /* |
2050 | * Choose a stateid for the LAYOUTGET. If we don't have a layout | |
2051 | * stateid, or it has been invalidated, then we must use the open | |
2052 | * stateid. | |
2053 | */ | |
67a3b721 | 2054 | if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { |
d9aba2b4 | 2055 | int status; |
183d9e7b JL |
2056 | |
2057 | /* | |
2058 | * The first layoutget for the file. Need to serialize per | |
9bf87482 PT |
2059 | * RFC 5661 Errata 3208. |
2060 | */ | |
2061 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, | |
2062 | &lo->plh_flags)) { | |
2063 | spin_unlock(&ino->i_lock); | |
d03360aa TM |
2064 | lseg = ERR_PTR(wait_on_bit(&lo->plh_flags, |
2065 | NFS_LAYOUT_FIRST_LAYOUTGET, | |
2066 | TASK_KILLABLE)); | |
2067 | if (IS_ERR(lseg)) | |
2068 | goto out_put_layout_hdr; | |
9bf87482 | 2069 | pnfs_put_layout_hdr(lo); |
183d9e7b | 2070 | dprintk("%s retrying\n", __func__); |
9bf87482 PT |
2071 | goto lookup_again; |
2072 | } | |
183d9e7b | 2073 | |
fbf4bcc9 | 2074 | spin_unlock(&ino->i_lock); |
183d9e7b | 2075 | first = true; |
d9aba2b4 | 2076 | status = nfs4_select_rw_stateid(ctx->state, |
70d2f7b1 | 2077 | iomode == IOMODE_RW ? FMODE_WRITE : FMODE_READ, |
d9aba2b4 TM |
2078 | NULL, &stateid, NULL); |
2079 | if (status != 0) { | |
731c74dd | 2080 | lseg = ERR_PTR(status); |
70d2f7b1 TM |
2081 | trace_pnfs_update_layout(ino, pos, count, |
2082 | iomode, lo, lseg, | |
2083 | PNFS_UPDATE_LAYOUT_INVALID_OPEN); | |
d9aba2b4 TM |
2084 | nfs4_schedule_stateid_recovery(server, ctx->state); |
2085 | pnfs_clear_first_layoutget(lo); | |
2086 | pnfs_put_layout_hdr(lo); | |
2087 | goto lookup_again; | |
70d2f7b1 | 2088 | } |
fbf4bcc9 | 2089 | spin_lock(&ino->i_lock); |
9bf87482 | 2090 | } else { |
183d9e7b | 2091 | nfs4_stateid_copy(&stateid, &lo->plh_stateid); |
9bf87482 | 2092 | } |
568e8c49 | 2093 | |
9a4bf31d | 2094 | if (pnfs_layoutgets_blocked(lo)) { |
183d9e7b | 2095 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
9a4bf31d | 2096 | PNFS_UPDATE_LAYOUT_BLOCKED); |
cf7d63f1 | 2097 | goto out_unlock; |
9a4bf31d | 2098 | } |
411ae722 | 2099 | nfs_layoutget_begin(lo); |
f49f9baa | 2100 | spin_unlock(&ino->i_lock); |
30005121 | 2101 | |
78746a38 | 2102 | _add_to_server_list(lo, server); |
e5e94017 | 2103 | |
09cbfeaf | 2104 | pg_offset = arg.offset & ~PAGE_MASK; |
707ed5fd BH |
2105 | if (pg_offset) { |
2106 | arg.offset -= pg_offset; | |
2107 | arg.length += pg_offset; | |
2108 | } | |
7c24d948 | 2109 | if (arg.length != NFS4_MAX_UINT64) |
09cbfeaf | 2110 | arg.length = PAGE_ALIGN(arg.length); |
707ed5fd | 2111 | |
5e36e2a9 | 2112 | lgp = pnfs_alloc_init_layoutget_args(ino, ctx, &stateid, &arg, gfp_flags); |
587f03de FI |
2113 | if (!lgp) { |
2114 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, NULL, | |
2115 | PNFS_UPDATE_LAYOUT_NOMEM); | |
411ae722 | 2116 | nfs_layoutget_end(lo); |
587f03de FI |
2117 | goto out_put_layout_hdr; |
2118 | } | |
2119 | ||
dacb452d | 2120 | lseg = nfs4_proc_layoutget(lgp, &timeout); |
183d9e7b JL |
2121 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
2122 | PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); | |
411ae722 | 2123 | nfs_layoutget_end(lo); |
83026d80 | 2124 | if (IS_ERR(lseg)) { |
183d9e7b | 2125 | switch(PTR_ERR(lseg)) { |
e85d7ee4 | 2126 | case -EBUSY: |
183d9e7b JL |
2127 | if (time_after(jiffies, giveup)) |
2128 | lseg = NULL; | |
66b53f32 TM |
2129 | break; |
2130 | case -ERECALLCONFLICT: | |
183d9e7b | 2131 | case -EAGAIN: |
56b38a1f | 2132 | break; |
183d9e7b JL |
2133 | default: |
2134 | if (!nfs_error_is_fatal(PTR_ERR(lseg))) { | |
2135 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
2136 | lseg = NULL; | |
2137 | } | |
56b38a1f TM |
2138 | goto out_put_layout_hdr; |
2139 | } | |
2140 | if (lseg) { | |
2141 | if (first) | |
2142 | pnfs_clear_first_layoutget(lo); | |
2143 | trace_pnfs_update_layout(ino, pos, count, | |
2144 | iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY); | |
2145 | pnfs_put_layout_hdr(lo); | |
2146 | goto lookup_again; | |
83026d80 JL |
2147 | } |
2148 | } else { | |
2149 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
2150 | } | |
2151 | ||
830ffb56 | 2152 | out_put_layout_hdr: |
d67ae825 TH |
2153 | if (first) |
2154 | pnfs_clear_first_layoutget(lo); | |
d5b9216f TM |
2155 | trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, |
2156 | PNFS_UPDATE_LAYOUT_EXIT); | |
70c3bd2b | 2157 | pnfs_put_layout_hdr(lo); |
e5e94017 | 2158 | out: |
f86bbcf8 TM |
2159 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
2160 | "(%s, offset: %llu, length: %llu)\n", | |
2161 | __func__, ino->i_sb->s_id, | |
2162 | (unsigned long long)NFS_FILEID(ino), | |
d600ad1f | 2163 | IS_ERR_OR_NULL(lseg) ? "not found" : "found", |
f86bbcf8 TM |
2164 | iomode==IOMODE_RW ? "read/write" : "read-only", |
2165 | (unsigned long long)pos, | |
2166 | (unsigned long long)count); | |
e5e94017 BH |
2167 | return lseg; |
2168 | out_unlock: | |
2169 | spin_unlock(&ino->i_lock); | |
830ffb56 | 2170 | goto out_put_layout_hdr; |
e5e94017 | 2171 | } |
7c24d948 | 2172 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
b1f69b75 | 2173 | |
540d9864 TM |
2174 | static bool |
2175 | pnfs_sanity_check_layout_range(struct pnfs_layout_range *range) | |
2176 | { | |
2177 | switch (range->iomode) { | |
2178 | case IOMODE_READ: | |
2179 | case IOMODE_RW: | |
2180 | break; | |
2181 | default: | |
2182 | return false; | |
2183 | } | |
2184 | if (range->offset == NFS4_MAX_UINT64) | |
2185 | return false; | |
2186 | if (range->length == 0) | |
2187 | return false; | |
2188 | if (range->length != NFS4_MAX_UINT64 && | |
2189 | range->length > NFS4_MAX_UINT64 - range->offset) | |
2190 | return false; | |
2191 | return true; | |
2192 | } | |
2193 | ||
78746a38 FI |
2194 | static struct pnfs_layout_hdr * |
2195 | _pnfs_grab_empty_layout(struct inode *ino, struct nfs_open_context *ctx) | |
2196 | { | |
2197 | struct pnfs_layout_hdr *lo; | |
2198 | ||
2199 | spin_lock(&ino->i_lock); | |
2200 | lo = pnfs_find_alloc_layout(ino, ctx, GFP_KERNEL); | |
2201 | if (!lo) | |
2202 | goto out_unlock; | |
2203 | if (!test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) | |
2204 | goto out_unlock; | |
2205 | if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
2206 | goto out_unlock; | |
2207 | if (pnfs_layoutgets_blocked(lo)) | |
2208 | goto out_unlock; | |
2209 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, &lo->plh_flags)) | |
2210 | goto out_unlock; | |
411ae722 | 2211 | nfs_layoutget_begin(lo); |
78746a38 FI |
2212 | spin_unlock(&ino->i_lock); |
2213 | _add_to_server_list(lo, NFS_SERVER(ino)); | |
2214 | return lo; | |
2215 | ||
2216 | out_unlock: | |
2217 | spin_unlock(&ino->i_lock); | |
2218 | pnfs_put_layout_hdr(lo); | |
2219 | return NULL; | |
2220 | } | |
2221 | ||
2409a976 FI |
2222 | static void _lgopen_prepare_attached(struct nfs4_opendata *data, |
2223 | struct nfs_open_context *ctx) | |
2224 | { | |
78746a38 FI |
2225 | struct inode *ino = data->dentry->d_inode; |
2226 | struct pnfs_layout_range rng = { | |
2227 | .iomode = (data->o_arg.fmode & FMODE_WRITE) ? | |
2228 | IOMODE_RW: IOMODE_READ, | |
2229 | .offset = 0, | |
2230 | .length = NFS4_MAX_UINT64, | |
2231 | }; | |
2232 | struct nfs4_layoutget *lgp; | |
2233 | struct pnfs_layout_hdr *lo; | |
2234 | ||
64294b08 TM |
2235 | /* Heuristic: don't send layoutget if we have cached data */ |
2236 | if (rng.iomode == IOMODE_READ && | |
2237 | (i_size_read(ino) == 0 || ino->i_mapping->nrpages != 0)) | |
2238 | return; | |
2239 | ||
78746a38 FI |
2240 | lo = _pnfs_grab_empty_layout(ino, ctx); |
2241 | if (!lo) | |
2242 | return; | |
2243 | lgp = pnfs_alloc_init_layoutget_args(ino, ctx, ¤t_stateid, | |
2244 | &rng, GFP_KERNEL); | |
2245 | if (!lgp) { | |
2246 | pnfs_clear_first_layoutget(lo); | |
2247 | pnfs_put_layout_hdr(lo); | |
2248 | return; | |
2249 | } | |
2250 | data->lgp = lgp; | |
2251 | data->o_arg.lg_args = &lgp->args; | |
2252 | data->o_res.lg_res = &lgp->res; | |
2409a976 FI |
2253 | } |
2254 | ||
2255 | static void _lgopen_prepare_floating(struct nfs4_opendata *data, | |
2256 | struct nfs_open_context *ctx) | |
2257 | { | |
2258 | struct pnfs_layout_range rng = { | |
2259 | .iomode = (data->o_arg.fmode & FMODE_WRITE) ? | |
2260 | IOMODE_RW: IOMODE_READ, | |
2261 | .offset = 0, | |
2262 | .length = NFS4_MAX_UINT64, | |
2263 | }; | |
2264 | struct nfs4_layoutget *lgp; | |
2265 | ||
2266 | lgp = pnfs_alloc_init_layoutget_args(NULL, ctx, ¤t_stateid, | |
2267 | &rng, GFP_KERNEL); | |
2268 | if (!lgp) | |
2269 | return; | |
2270 | data->lgp = lgp; | |
2271 | data->o_arg.lg_args = &lgp->args; | |
2272 | data->o_res.lg_res = &lgp->res; | |
2273 | } | |
2274 | ||
2275 | void pnfs_lgopen_prepare(struct nfs4_opendata *data, | |
2276 | struct nfs_open_context *ctx) | |
2277 | { | |
2278 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
2279 | ||
2280 | if (!(pnfs_enabled_sb(server) && | |
2281 | server->pnfs_curr_ld->flags & PNFS_LAYOUTGET_ON_OPEN)) | |
2282 | return; | |
2283 | /* Could check on max_ops, but currently hardcoded high enough */ | |
6e01260c FI |
2284 | if (!nfs_server_capable(data->dir->d_inode, NFS_CAP_LGOPEN)) |
2285 | return; | |
2409a976 FI |
2286 | if (data->state) |
2287 | _lgopen_prepare_attached(data, ctx); | |
2288 | else | |
2289 | _lgopen_prepare_floating(data, ctx); | |
2290 | } | |
2291 | ||
2292 | void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, | |
2293 | struct nfs_open_context *ctx) | |
2294 | { | |
2295 | struct pnfs_layout_hdr *lo; | |
2296 | struct pnfs_layout_segment *lseg; | |
c49b5209 | 2297 | struct nfs_server *srv = NFS_SERVER(ino); |
2409a976 FI |
2298 | u32 iomode; |
2299 | ||
6e01260c | 2300 | if (!lgp) |
2409a976 | 2301 | return; |
6e01260c FI |
2302 | dprintk("%s: entered with status %i\n", __func__, lgp->res.status); |
2303 | if (lgp->res.status) { | |
2304 | switch (lgp->res.status) { | |
6e01260c | 2305 | default: |
8dc96566 TM |
2306 | break; |
2307 | /* | |
2308 | * Halt lgopen attempts if the server doesn't recognise | |
2309 | * the "current stateid" value, the layout type, or the | |
2310 | * layoutget operation as being valid. | |
2311 | * Also if it complains about too many ops in the compound | |
2312 | * or of the request/reply being too big. | |
2313 | */ | |
2314 | case -NFS4ERR_BAD_STATEID: | |
2315 | case -NFS4ERR_NOTSUPP: | |
2316 | case -NFS4ERR_REP_TOO_BIG: | |
2317 | case -NFS4ERR_REP_TOO_BIG_TO_CACHE: | |
2318 | case -NFS4ERR_REQ_TOO_BIG: | |
2319 | case -NFS4ERR_TOO_MANY_OPS: | |
2320 | case -NFS4ERR_UNKNOWN_LAYOUTTYPE: | |
c49b5209 | 2321 | srv->caps &= ~NFS_CAP_LGOPEN; |
6e01260c FI |
2322 | } |
2323 | return; | |
2324 | } | |
2409a976 | 2325 | if (!lgp->args.inode) { |
78746a38 FI |
2326 | lo = _pnfs_grab_empty_layout(ino, ctx); |
2327 | if (!lo) | |
2328 | return; | |
2409a976 FI |
2329 | lgp->args.inode = ino; |
2330 | } else | |
2331 | lo = NFS_I(lgp->args.inode)->layout; | |
2409a976 FI |
2332 | |
2333 | lseg = pnfs_layout_process(lgp); | |
32f1c28f | 2334 | if (!IS_ERR(lseg)) { |
2409a976 FI |
2335 | iomode = lgp->args.range.iomode; |
2336 | pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); | |
2337 | pnfs_put_lseg(lseg); | |
2338 | } | |
30ae2412 FI |
2339 | } |
2340 | ||
2341 | void nfs4_lgopen_release(struct nfs4_layoutget *lgp) | |
2342 | { | |
2343 | if (lgp != NULL) { | |
2344 | struct inode *inode = lgp->args.inode; | |
2345 | if (inode) { | |
2346 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; | |
30ae2412 | 2347 | pnfs_clear_first_layoutget(lo); |
411ae722 | 2348 | nfs_layoutget_end(lo); |
30ae2412 FI |
2349 | } |
2350 | pnfs_layoutget_free(lgp); | |
2351 | } | |
2409a976 FI |
2352 | } |
2353 | ||
a0b0a6e3 | 2354 | struct pnfs_layout_segment * |
b1f69b75 AA |
2355 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
2356 | { | |
2357 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; | |
2358 | struct nfs4_layoutget_res *res = &lgp->res; | |
2359 | struct pnfs_layout_segment *lseg; | |
b7edfaa1 | 2360 | struct inode *ino = lo->plh_inode; |
78096cca | 2361 | LIST_HEAD(free_me); |
540d9864 TM |
2362 | |
2363 | if (!pnfs_sanity_check_layout_range(&res->range)) | |
1b3c6d07 | 2364 | return ERR_PTR(-EINVAL); |
b1f69b75 AA |
2365 | |
2366 | /* Inject layout blob into I/O device driver */ | |
a75b9df9 | 2367 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
1b3c6d07 | 2368 | if (IS_ERR_OR_NULL(lseg)) { |
b1f69b75 | 2369 | if (!lseg) |
1b3c6d07 JL |
2370 | lseg = ERR_PTR(-ENOMEM); |
2371 | ||
2372 | dprintk("%s: Could not allocate layout: error %ld\n", | |
2373 | __func__, PTR_ERR(lseg)); | |
2374 | return lseg; | |
b1f69b75 AA |
2375 | } |
2376 | ||
119cef97 | 2377 | pnfs_init_lseg(lo, lseg, &res->range, &res->stateid); |
1013df61 | 2378 | |
b1f69b75 | 2379 | spin_lock(&ino->i_lock); |
e1c06f80 | 2380 | if (pnfs_layoutgets_blocked(lo)) { |
43f1b3da | 2381 | dprintk("%s forget reply due to state\n", __func__); |
1b3c6d07 | 2382 | goto out_forget; |
43f1b3da | 2383 | } |
038d6493 | 2384 | |
9888d837 TM |
2385 | if (!pnfs_layout_is_valid(lo)) { |
2386 | /* We have a completely new layout */ | |
59b56394 | 2387 | pnfs_set_layout_stateid(lo, &res->stateid, lgp->cred, true); |
9888d837 | 2388 | } else if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
362f7474 CH |
2389 | /* existing state ID, make sure the sequence number matches. */ |
2390 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { | |
2391 | dprintk("%s forget reply due to sequence\n", __func__); | |
1b3c6d07 | 2392 | goto out_forget; |
362f7474 | 2393 | } |
59b56394 | 2394 | pnfs_set_layout_stateid(lo, &res->stateid, lgp->cred, false); |
362f7474 CH |
2395 | } else { |
2396 | /* | |
2397 | * We got an entirely new state ID. Mark all segments for the | |
9888d837 | 2398 | * inode invalid, and retry the layoutget |
362f7474 | 2399 | */ |
d9b61708 | 2400 | pnfs_mark_layout_stateid_invalid(lo, &free_me); |
9888d837 | 2401 | goto out_forget; |
362f7474 | 2402 | } |
038d6493 | 2403 | |
9369a431 | 2404 | pnfs_get_lseg(lseg); |
03772d2f | 2405 | pnfs_layout_insert_lseg(lo, lseg, &free_me); |
8e0acf90 | 2406 | |
b1f69b75 | 2407 | |
3976143b | 2408 | if (res->return_on_close) |
f7e8917a | 2409 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
f7e8917a | 2410 | |
b1f69b75 | 2411 | spin_unlock(&ino->i_lock); |
78096cca | 2412 | pnfs_free_lseg_list(&free_me); |
a0b0a6e3 | 2413 | return lseg; |
43f1b3da | 2414 | |
1b3c6d07 | 2415 | out_forget: |
43f1b3da FI |
2416 | spin_unlock(&ino->i_lock); |
2417 | lseg->pls_layout = lo; | |
2418 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); | |
1b3c6d07 | 2419 | return ERR_PTR(-EAGAIN); |
b1f69b75 AA |
2420 | } |
2421 | ||
2f215968 TM |
2422 | /** |
2423 | * pnfs_mark_matching_lsegs_return - Free or return matching layout segments | |
2424 | * @lo: pointer to layout header | |
2425 | * @tmp_list: list header to be used with pnfs_free_lseg_list() | |
2426 | * @return_range: describe layout segment ranges to be returned | |
e0b7d420 | 2427 | * @seq: stateid seqid to match |
2f215968 TM |
2428 | * |
2429 | * This function is mainly intended for use by layoutrecall. It attempts | |
2430 | * to free the layout segment immediately, or else to mark it for return | |
2431 | * as soon as its reference count drops to zero. | |
e0b7d420 TM |
2432 | * |
2433 | * Returns | |
2434 | * - 0: a layoutreturn needs to be scheduled. | |
2435 | * - EBUSY: there are layout segment that are still in use. | |
2436 | * - ENOENT: there are no layout segments that need to be returned. | |
2f215968 | 2437 | */ |
10335556 | 2438 | int |
016256df PT |
2439 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
2440 | struct list_head *tmp_list, | |
6d597e17 JL |
2441 | const struct pnfs_layout_range *return_range, |
2442 | u32 seq) | |
016256df PT |
2443 | { |
2444 | struct pnfs_layout_segment *lseg, *next; | |
10335556 | 2445 | int remaining = 0; |
016256df PT |
2446 | |
2447 | dprintk("%s:Begin lo %p\n", __func__, lo); | |
2448 | ||
fc7ff367 | 2449 | assert_spin_locked(&lo->plh_inode->i_lock); |
016256df PT |
2450 | |
2451 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) | |
e036f464 | 2452 | if (pnfs_match_lseg_recall(lseg, return_range, seq)) { |
016256df PT |
2453 | dprintk("%s: marking lseg %p iomode %d " |
2454 | "offset %llu length %llu\n", __func__, | |
2455 | lseg, lseg->pls_range.iomode, | |
2456 | lseg->pls_range.offset, | |
2457 | lseg->pls_range.length); | |
ff041727 | 2458 | if (mark_lseg_invalid(lseg, tmp_list)) |
2f215968 TM |
2459 | continue; |
2460 | remaining++; | |
016256df | 2461 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); |
016256df | 2462 | } |
6d597e17 | 2463 | |
e0b7d420 | 2464 | if (remaining) { |
6d597e17 | 2465 | pnfs_set_plh_return_info(lo, return_range->iomode, seq); |
e0b7d420 TM |
2466 | return -EBUSY; |
2467 | } | |
6d597e17 | 2468 | |
e0b7d420 TM |
2469 | if (!list_empty(&lo->plh_return_segs)) { |
2470 | pnfs_set_plh_return_info(lo, return_range->iomode, seq); | |
2471 | return 0; | |
2472 | } | |
2473 | ||
2474 | return -ENOENT; | |
016256df PT |
2475 | } |
2476 | ||
b5fdf841 TM |
2477 | static void |
2478 | pnfs_mark_layout_for_return(struct inode *inode, | |
2479 | const struct pnfs_layout_range *range) | |
016256df | 2480 | { |
b5fdf841 | 2481 | struct pnfs_layout_hdr *lo; |
10335556 | 2482 | bool return_now = false; |
016256df PT |
2483 | |
2484 | spin_lock(&inode->i_lock); | |
b5fdf841 | 2485 | lo = NFS_I(inode)->layout; |
bdebfccd TM |
2486 | if (!pnfs_layout_is_valid(lo)) { |
2487 | spin_unlock(&inode->i_lock); | |
2488 | return; | |
2489 | } | |
b5fdf841 | 2490 | pnfs_set_plh_return_info(lo, range->iomode, 0); |
016256df PT |
2491 | /* |
2492 | * mark all matching lsegs so that we are sure to have no live | |
2493 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() | |
2494 | * for how it works. | |
2495 | */ | |
b5fdf841 | 2496 | if (pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs, range, 0) != -EBUSY) { |
44ea8dfc | 2497 | const struct cred *cred; |
10335556 | 2498 | nfs4_stateid stateid; |
e5fd1904 | 2499 | enum pnfs_iomode iomode; |
10335556 | 2500 | |
44ea8dfc | 2501 | return_now = pnfs_prepare_layoutreturn(lo, &stateid, &cred, &iomode); |
10335556 TM |
2502 | spin_unlock(&inode->i_lock); |
2503 | if (return_now) | |
44ea8dfc | 2504 | pnfs_send_layoutreturn(lo, &stateid, &cred, iomode, false); |
10335556 TM |
2505 | } else { |
2506 | spin_unlock(&inode->i_lock); | |
2507 | nfs_commit_inode(inode, 0); | |
2508 | } | |
016256df | 2509 | } |
b5fdf841 TM |
2510 | |
2511 | void pnfs_error_mark_layout_for_return(struct inode *inode, | |
2512 | struct pnfs_layout_segment *lseg) | |
2513 | { | |
2514 | struct pnfs_layout_range range = { | |
2515 | .iomode = lseg->pls_range.iomode, | |
2516 | .offset = 0, | |
2517 | .length = NFS4_MAX_UINT64, | |
2518 | }; | |
2519 | ||
2520 | pnfs_mark_layout_for_return(inode, &range); | |
2521 | } | |
016256df PT |
2522 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); |
2523 | ||
b5fdf841 TM |
2524 | static bool |
2525 | pnfs_layout_can_be_returned(struct pnfs_layout_hdr *lo) | |
2526 | { | |
2527 | return pnfs_layout_is_valid(lo) && | |
2528 | !test_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags) && | |
2529 | !test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); | |
2530 | } | |
2531 | ||
2532 | static struct pnfs_layout_segment * | |
2533 | pnfs_find_first_lseg(struct pnfs_layout_hdr *lo, | |
2534 | const struct pnfs_layout_range *range, | |
2535 | enum pnfs_iomode iomode) | |
2536 | { | |
2537 | struct pnfs_layout_segment *lseg; | |
2538 | ||
2539 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { | |
2540 | if (!test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) | |
2541 | continue; | |
2542 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) | |
2543 | continue; | |
2544 | if (lseg->pls_range.iomode != iomode && iomode != IOMODE_ANY) | |
2545 | continue; | |
2546 | if (pnfs_lseg_range_intersecting(&lseg->pls_range, range)) | |
2547 | return lseg; | |
2548 | } | |
2549 | return NULL; | |
2550 | } | |
2551 | ||
2552 | /* Find open file states whose mode matches that of the range */ | |
2553 | static bool | |
2554 | pnfs_should_return_unused_layout(struct pnfs_layout_hdr *lo, | |
2555 | const struct pnfs_layout_range *range) | |
2556 | { | |
2557 | struct list_head *head; | |
2558 | struct nfs_open_context *ctx; | |
2559 | fmode_t mode = 0; | |
2560 | ||
2561 | if (!pnfs_layout_can_be_returned(lo) || | |
2562 | !pnfs_find_first_lseg(lo, range, range->iomode)) | |
2563 | return false; | |
2564 | ||
2565 | head = &NFS_I(lo->plh_inode)->open_files; | |
2566 | list_for_each_entry_rcu(ctx, head, list) { | |
2567 | if (ctx->state) | |
2568 | mode |= ctx->state->state & (FMODE_READ|FMODE_WRITE); | |
2569 | } | |
2570 | ||
2571 | switch (range->iomode) { | |
2572 | default: | |
2573 | break; | |
2574 | case IOMODE_READ: | |
2575 | mode &= ~FMODE_WRITE; | |
2576 | break; | |
2577 | case IOMODE_RW: | |
2578 | if (pnfs_find_first_lseg(lo, range, IOMODE_READ)) | |
2579 | mode &= ~FMODE_READ; | |
2580 | } | |
2581 | return mode == 0; | |
2582 | } | |
2583 | ||
2584 | static int | |
2585 | pnfs_layout_return_unused_byserver(struct nfs_server *server, void *data) | |
2586 | { | |
2587 | const struct pnfs_layout_range *range = data; | |
2588 | struct pnfs_layout_hdr *lo; | |
2589 | struct inode *inode; | |
2590 | restart: | |
2591 | rcu_read_lock(); | |
2592 | list_for_each_entry_rcu(lo, &server->layouts, plh_layouts) { | |
2593 | if (!pnfs_layout_can_be_returned(lo) || | |
2594 | test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) | |
2595 | continue; | |
2596 | inode = lo->plh_inode; | |
2597 | spin_lock(&inode->i_lock); | |
2598 | if (!pnfs_should_return_unused_layout(lo, range)) { | |
2599 | spin_unlock(&inode->i_lock); | |
2600 | continue; | |
2601 | } | |
2602 | spin_unlock(&inode->i_lock); | |
2603 | inode = pnfs_grab_inode_layout_hdr(lo); | |
2604 | if (!inode) | |
2605 | continue; | |
2606 | rcu_read_unlock(); | |
2607 | pnfs_mark_layout_for_return(inode, range); | |
2608 | iput(inode); | |
2609 | cond_resched(); | |
2610 | goto restart; | |
2611 | } | |
2612 | rcu_read_unlock(); | |
2613 | return 0; | |
2614 | } | |
2615 | ||
2616 | void | |
2617 | pnfs_layout_return_unused_byclid(struct nfs_client *clp, | |
2618 | enum pnfs_iomode iomode) | |
2619 | { | |
2620 | struct pnfs_layout_range range = { | |
2621 | .iomode = iomode, | |
2622 | .offset = 0, | |
2623 | .length = NFS4_MAX_UINT64, | |
2624 | }; | |
2625 | ||
2626 | nfs_client_for_each_server(clp, pnfs_layout_return_unused_byserver, | |
2627 | &range); | |
2628 | } | |
2629 | ||
b3230e80 TM |
2630 | void |
2631 | pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio) | |
2632 | { | |
2633 | if (pgio->pg_lseg == NULL || | |
2634 | test_bit(NFS_LSEG_VALID, &pgio->pg_lseg->pls_flags)) | |
2635 | return; | |
2636 | pnfs_put_lseg(pgio->pg_lseg); | |
2637 | pgio->pg_lseg = NULL; | |
2638 | } | |
2639 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_check_layout); | |
2640 | ||
08cb5b0f BC |
2641 | /* |
2642 | * Check for any intersection between the request and the pgio->pg_lseg, | |
2643 | * and if none, put this pgio->pg_lseg away. | |
2644 | */ | |
e1e54ab7 | 2645 | void |
08cb5b0f BC |
2646 | pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
2647 | { | |
2648 | if (pgio->pg_lseg && !pnfs_lseg_request_intersecting(pgio->pg_lseg, req)) { | |
2649 | pnfs_put_lseg(pgio->pg_lseg); | |
2650 | pgio->pg_lseg = NULL; | |
2651 | } | |
2652 | } | |
e1e54ab7 | 2653 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_check_range); |
08cb5b0f | 2654 | |
d8007d4d TM |
2655 | void |
2656 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) | |
2657 | { | |
1fd937bd PT |
2658 | u64 rd_size = req->wb_bytes; |
2659 | ||
b3230e80 | 2660 | pnfs_generic_pg_check_layout(pgio); |
08cb5b0f | 2661 | pnfs_generic_pg_check_range(pgio, req); |
cb5d04bc PT |
2662 | if (pgio->pg_lseg == NULL) { |
2663 | if (pgio->pg_dreq == NULL) | |
2664 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); | |
2665 | else | |
2666 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); | |
2667 | ||
2668 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
9fcd5960 | 2669 | nfs_req_openctx(req), |
cb5d04bc PT |
2670 | req_offset(req), |
2671 | rd_size, | |
2672 | IOMODE_READ, | |
c7d73af2 | 2673 | false, |
cb5d04bc | 2674 | GFP_KERNEL); |
d600ad1f PT |
2675 | if (IS_ERR(pgio->pg_lseg)) { |
2676 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
2677 | pgio->pg_lseg = NULL; | |
2678 | return; | |
2679 | } | |
cb5d04bc | 2680 | } |
e885de1a TM |
2681 | /* If no lseg, fall back to read through mds */ |
2682 | if (pgio->pg_lseg == NULL) | |
1f945357 | 2683 | nfs_pageio_reset_read_mds(pgio); |
e885de1a | 2684 | |
d8007d4d TM |
2685 | } |
2686 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); | |
2687 | ||
2688 | void | |
6296556f PT |
2689 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
2690 | struct nfs_page *req, u64 wb_size) | |
d8007d4d | 2691 | { |
b3230e80 | 2692 | pnfs_generic_pg_check_layout(pgio); |
08cb5b0f | 2693 | pnfs_generic_pg_check_range(pgio, req); |
d600ad1f | 2694 | if (pgio->pg_lseg == NULL) { |
cb5d04bc | 2695 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
9fcd5960 | 2696 | nfs_req_openctx(req), |
cb5d04bc PT |
2697 | req_offset(req), |
2698 | wb_size, | |
2699 | IOMODE_RW, | |
c7d73af2 | 2700 | false, |
2b17d725 | 2701 | GFP_KERNEL); |
d600ad1f PT |
2702 | if (IS_ERR(pgio->pg_lseg)) { |
2703 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
2704 | pgio->pg_lseg = NULL; | |
2705 | return; | |
2706 | } | |
2707 | } | |
e885de1a TM |
2708 | /* If no lseg, fall back to write through mds */ |
2709 | if (pgio->pg_lseg == NULL) | |
1f945357 | 2710 | nfs_pageio_reset_write_mds(pgio); |
d8007d4d TM |
2711 | } |
2712 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); | |
2713 | ||
180bb5ec WAA |
2714 | void |
2715 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) | |
2716 | { | |
2717 | if (desc->pg_lseg) { | |
2718 | pnfs_put_lseg(desc->pg_lseg); | |
2719 | desc->pg_lseg = NULL; | |
2720 | } | |
2721 | } | |
2722 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); | |
2723 | ||
b4fdac1a WAA |
2724 | /* |
2725 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number | |
2726 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
2727 | */ | |
2728 | size_t | |
a7d42ddb WAA |
2729 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
2730 | struct nfs_page *prev, struct nfs_page *req) | |
94ad1c80 | 2731 | { |
0f9c429e | 2732 | unsigned int size; |
c5e20cb7 | 2733 | u64 seg_end, req_start, seg_left; |
0f9c429e WAA |
2734 | |
2735 | size = nfs_generic_pg_test(pgio, prev, req); | |
0f9c429e WAA |
2736 | if (!size) |
2737 | return 0; | |
94ad1c80 | 2738 | |
19982ba8 | 2739 | /* |
c5e20cb7 WAA |
2740 | * 'size' contains the number of bytes left in the current page (up |
2741 | * to the original size asked for in @req->wb_bytes). | |
2742 | * | |
2743 | * Calculate how many bytes are left in the layout segment | |
2744 | * and if there are less bytes than 'size', return that instead. | |
19982ba8 TM |
2745 | * |
2746 | * Please also note that 'end_offset' is actually the offset of the | |
2747 | * first byte that lies outside the pnfs_layout_range. FIXME? | |
2748 | * | |
2749 | */ | |
19b54848 | 2750 | if (pgio->pg_lseg) { |
17822b20 | 2751 | seg_end = pnfs_end_offset(pgio->pg_lseg->pls_range.offset, |
c5e20cb7 WAA |
2752 | pgio->pg_lseg->pls_range.length); |
2753 | req_start = req_offset(req); | |
08cb5b0f | 2754 | |
c5e20cb7 | 2755 | /* start of request is past the last byte of this segment */ |
08cb5b0f | 2756 | if (req_start >= seg_end) |
19b54848 | 2757 | return 0; |
c5e20cb7 WAA |
2758 | |
2759 | /* adjust 'size' iff there are fewer bytes left in the | |
2760 | * segment than what nfs_generic_pg_test returned */ | |
2761 | seg_left = seg_end - req_start; | |
2762 | if (seg_left < size) | |
2763 | size = (unsigned int)seg_left; | |
19b54848 | 2764 | } |
0f9c429e | 2765 | |
19b54848 | 2766 | return size; |
94ad1c80 | 2767 | } |
89a58e32 | 2768 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
94ad1c80 | 2769 | |
53113ad3 | 2770 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
e2fecb21 TM |
2771 | { |
2772 | struct nfs_pageio_descriptor pgio; | |
e2fecb21 TM |
2773 | |
2774 | /* Resend all requests through the MDS */ | |
53113ad3 WAA |
2775 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
2776 | hdr->completion_ops); | |
c7070113 | 2777 | set_bit(NFS_CONTEXT_RESEND_WRITES, &hdr->args.context->flags); |
53113ad3 | 2778 | return nfs_pageio_resend(&pgio, hdr); |
e2fecb21 | 2779 | } |
e7dd79af | 2780 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
e2fecb21 | 2781 | |
d45f60c6 | 2782 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2783 | { |
cd841605 FI |
2784 | |
2785 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); | |
2786 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2787 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2788 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2789 | } |
6c75dc0d | 2790 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2791 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
1acbbb4e FI |
2792 | } |
2793 | ||
d20581aa BH |
2794 | /* |
2795 | * Called by non rpc-based layout drivers | |
2796 | */ | |
d45f60c6 | 2797 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
44b83799 | 2798 | { |
f8417b48 | 2799 | if (likely(!hdr->pnfs_error)) { |
67af7611 TM |
2800 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
2801 | hdr->mds_offset + hdr->res.count); | |
d45f60c6 | 2802 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
2803 | } |
2804 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); | |
2805 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2806 | pnfs_ld_handle_write_error(hdr); |
2807 | hdr->mds_ops->rpc_release(hdr); | |
44b83799 | 2808 | } |
d20581aa | 2809 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
44b83799 | 2810 | |
dce81290 TM |
2811 | static void |
2812 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2813 | struct nfs_pgio_header *hdr) |
dce81290 | 2814 | { |
48d635f1 | 2815 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2816 | |
6c75dc0d | 2817 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2818 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
6c75dc0d | 2819 | nfs_pageio_reset_write_mds(desc); |
a7d42ddb | 2820 | mirror->pg_recoalesce = 1; |
6c75dc0d | 2821 | } |
ba4a76f7 | 2822 | hdr->completion_ops->completion(hdr); |
dce81290 TM |
2823 | } |
2824 | ||
2825 | static enum pnfs_try_status | |
d45f60c6 | 2826 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
dce81290 TM |
2827 | const struct rpc_call_ops *call_ops, |
2828 | struct pnfs_layout_segment *lseg, | |
2829 | int how) | |
0382b744 | 2830 | { |
cd841605 | 2831 | struct inode *inode = hdr->inode; |
0382b744 AA |
2832 | enum pnfs_try_status trypnfs; |
2833 | struct nfs_server *nfss = NFS_SERVER(inode); | |
2834 | ||
cd841605 | 2835 | hdr->mds_ops = call_ops; |
0382b744 AA |
2836 | |
2837 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, | |
d45f60c6 WAA |
2838 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
2839 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); | |
6c75dc0d | 2840 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
0382b744 | 2841 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
0382b744 AA |
2842 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2843 | return trypnfs; | |
2844 | } | |
2845 | ||
dce81290 | 2846 | static void |
7f714720 WAA |
2847 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
2848 | struct nfs_pgio_header *hdr, int how) | |
dce81290 | 2849 | { |
dce81290 TM |
2850 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2851 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2852 | enum pnfs_try_status trypnfs; |
dce81290 | 2853 | |
d45f60c6 | 2854 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
37f8aa16 TM |
2855 | switch (trypnfs) { |
2856 | case PNFS_NOT_ATTEMPTED: | |
d45f60c6 | 2857 | pnfs_write_through_mds(desc, hdr); |
37f8aa16 TM |
2858 | case PNFS_ATTEMPTED: |
2859 | break; | |
2860 | case PNFS_TRY_AGAIN: | |
2861 | /* cleanup hdr and prepare to redo pnfs */ | |
2862 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
2863 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); | |
2864 | list_splice_init(&hdr->pages, &mirror->pg_list); | |
2865 | mirror->pg_recoalesce = 1; | |
2866 | } | |
2867 | hdr->mds_ops->rpc_release(hdr); | |
2868 | } | |
dce81290 TM |
2869 | } |
2870 | ||
6c75dc0d FI |
2871 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
2872 | { | |
9369a431 | 2873 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 2874 | nfs_pgio_header_free(hdr); |
6c75dc0d FI |
2875 | } |
2876 | ||
dce81290 TM |
2877 | int |
2878 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
2879 | { | |
6c75dc0d | 2880 | struct nfs_pgio_header *hdr; |
dce81290 TM |
2881 | int ret; |
2882 | ||
1e7f3a48 WAA |
2883 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
2884 | if (!hdr) { | |
2bff2288 PT |
2885 | desc->pg_error = -ENOMEM; |
2886 | return desc->pg_error; | |
dce81290 | 2887 | } |
6c75dc0d | 2888 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
180bb5ec | 2889 | |
9369a431 | 2890 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 2891 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 2892 | if (!ret) |
7f714720 | 2893 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
a7d42ddb | 2894 | |
6c75dc0d | 2895 | return ret; |
dce81290 TM |
2896 | } |
2897 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); | |
2898 | ||
53113ad3 | 2899 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
62e4a769 TM |
2900 | { |
2901 | struct nfs_pageio_descriptor pgio; | |
2902 | ||
1acbbb4e | 2903 | /* Resend all requests through the MDS */ |
53113ad3 WAA |
2904 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
2905 | return nfs_pageio_resend(&pgio, hdr); | |
1acbbb4e | 2906 | } |
e7dd79af | 2907 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
1acbbb4e | 2908 | |
d45f60c6 | 2909 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
1acbbb4e | 2910 | { |
cd841605 FI |
2911 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
2912 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & | |
1acbbb4e | 2913 | PNFS_LAYOUTRET_ON_ERROR) { |
cd841605 | 2914 | pnfs_return_layout(hdr->inode); |
1acbbb4e | 2915 | } |
4db6e0b7 | 2916 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
53113ad3 | 2917 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
62e4a769 TM |
2918 | } |
2919 | ||
d20581aa BH |
2920 | /* |
2921 | * Called by non rpc-based layout drivers | |
2922 | */ | |
d45f60c6 | 2923 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
d20581aa | 2924 | { |
bfc505de | 2925 | if (likely(!hdr->pnfs_error)) |
d45f60c6 | 2926 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
f8417b48 KM |
2927 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
2928 | if (unlikely(hdr->pnfs_error)) | |
d45f60c6 WAA |
2929 | pnfs_ld_handle_read_error(hdr); |
2930 | hdr->mds_ops->rpc_release(hdr); | |
d20581aa BH |
2931 | } |
2932 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); | |
2933 | ||
493292dd TM |
2934 | static void |
2935 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, | |
d45f60c6 | 2936 | struct nfs_pgio_header *hdr) |
493292dd | 2937 | { |
48d635f1 | 2938 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
a7d42ddb | 2939 | |
4db6e0b7 | 2940 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
a7d42ddb | 2941 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
4db6e0b7 | 2942 | nfs_pageio_reset_read_mds(desc); |
a7d42ddb | 2943 | mirror->pg_recoalesce = 1; |
4db6e0b7 | 2944 | } |
ba4a76f7 | 2945 | hdr->completion_ops->completion(hdr); |
493292dd TM |
2946 | } |
2947 | ||
64419a9b AA |
2948 | /* |
2949 | * Call the appropriate parallel I/O subsystem read function. | |
2950 | */ | |
493292dd | 2951 | static enum pnfs_try_status |
d45f60c6 | 2952 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
493292dd TM |
2953 | const struct rpc_call_ops *call_ops, |
2954 | struct pnfs_layout_segment *lseg) | |
64419a9b | 2955 | { |
cd841605 | 2956 | struct inode *inode = hdr->inode; |
64419a9b AA |
2957 | struct nfs_server *nfss = NFS_SERVER(inode); |
2958 | enum pnfs_try_status trypnfs; | |
2959 | ||
cd841605 | 2960 | hdr->mds_ops = call_ops; |
64419a9b AA |
2961 | |
2962 | dprintk("%s: Reading ino:%lu %u@%llu\n", | |
d45f60c6 | 2963 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
64419a9b | 2964 | |
d45f60c6 | 2965 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
4db6e0b7 | 2966 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
64419a9b | 2967 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
64419a9b AA |
2968 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
2969 | return trypnfs; | |
2970 | } | |
863a3c6c | 2971 | |
ceb11e13 | 2972 | /* Resend all requests through pnfs. */ |
563c53e7 TM |
2973 | void pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr, |
2974 | unsigned int mirror_idx) | |
ceb11e13 PT |
2975 | { |
2976 | struct nfs_pageio_descriptor pgio; | |
2977 | ||
1b1bc66b | 2978 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
54e4a0df TM |
2979 | /* Prevent deadlocks with layoutreturn! */ |
2980 | pnfs_put_lseg(hdr->lseg); | |
2981 | hdr->lseg = NULL; | |
2982 | ||
1b1bc66b WAA |
2983 | nfs_pageio_init_read(&pgio, hdr->inode, false, |
2984 | hdr->completion_ops); | |
563c53e7 | 2985 | pgio.pg_mirror_idx = mirror_idx; |
1b1bc66b WAA |
2986 | hdr->task.tk_status = nfs_pageio_resend(&pgio, hdr); |
2987 | } | |
ceb11e13 PT |
2988 | } |
2989 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); | |
2990 | ||
493292dd | 2991 | static void |
7f714720 | 2992 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
493292dd | 2993 | { |
493292dd TM |
2994 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
2995 | struct pnfs_layout_segment *lseg = desc->pg_lseg; | |
7f714720 | 2996 | enum pnfs_try_status trypnfs; |
493292dd | 2997 | |
d45f60c6 | 2998 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
6aeafd05 TM |
2999 | switch (trypnfs) { |
3000 | case PNFS_NOT_ATTEMPTED: | |
d45f60c6 | 3001 | pnfs_read_through_mds(desc, hdr); |
6aeafd05 TM |
3002 | case PNFS_ATTEMPTED: |
3003 | break; | |
3004 | case PNFS_TRY_AGAIN: | |
3005 | /* cleanup hdr and prepare to redo pnfs */ | |
3006 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
3007 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); | |
3008 | list_splice_init(&hdr->pages, &mirror->pg_list); | |
3009 | mirror->pg_recoalesce = 1; | |
3010 | } | |
3011 | hdr->mds_ops->rpc_release(hdr); | |
3012 | } | |
493292dd TM |
3013 | } |
3014 | ||
4db6e0b7 FI |
3015 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
3016 | { | |
9369a431 | 3017 | pnfs_put_lseg(hdr->lseg); |
1e7f3a48 | 3018 | nfs_pgio_header_free(hdr); |
4db6e0b7 FI |
3019 | } |
3020 | ||
493292dd TM |
3021 | int |
3022 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) | |
3023 | { | |
4db6e0b7 | 3024 | struct nfs_pgio_header *hdr; |
493292dd TM |
3025 | int ret; |
3026 | ||
1e7f3a48 WAA |
3027 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
3028 | if (!hdr) { | |
2bff2288 PT |
3029 | desc->pg_error = -ENOMEM; |
3030 | return desc->pg_error; | |
493292dd | 3031 | } |
4db6e0b7 | 3032 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
9369a431 | 3033 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
ef2c488c | 3034 | ret = nfs_generic_pgio(desc, hdr); |
180bb5ec | 3035 | if (!ret) |
7f714720 | 3036 | pnfs_do_read(desc, hdr); |
4db6e0b7 | 3037 | return ret; |
493292dd TM |
3038 | } |
3039 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); | |
3040 | ||
71244d9b TM |
3041 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
3042 | { | |
3043 | unsigned long *bitlock = &NFS_I(inode)->flags; | |
3044 | ||
3045 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
4e857c58 | 3046 | smp_mb__after_atomic(); |
71244d9b TM |
3047 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
3048 | } | |
3049 | ||
863a3c6c | 3050 | /* |
a9bae566 | 3051 | * There can be multiple RW segments. |
863a3c6c | 3052 | */ |
a9bae566 | 3053 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
863a3c6c | 3054 | { |
a9bae566 | 3055 | struct pnfs_layout_segment *lseg; |
863a3c6c | 3056 | |
a9bae566 PT |
3057 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
3058 | if (lseg->pls_range.iomode == IOMODE_RW && | |
a073dbff | 3059 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
a9bae566 PT |
3060 | list_add(&lseg->pls_lc_list, listp); |
3061 | } | |
863a3c6c AA |
3062 | } |
3063 | ||
a073dbff TM |
3064 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
3065 | { | |
3066 | struct pnfs_layout_segment *lseg, *tmp; | |
a073dbff TM |
3067 | |
3068 | /* Matched by references in pnfs_set_layoutcommit */ | |
3069 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { | |
3070 | list_del_init(&lseg->pls_lc_list); | |
3071 | pnfs_put_lseg(lseg); | |
3072 | } | |
3073 | ||
71244d9b | 3074 | pnfs_clear_layoutcommitting(inode); |
a073dbff TM |
3075 | } |
3076 | ||
1b0ae068 PT |
3077 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
3078 | { | |
b9e028fd | 3079 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
1b0ae068 PT |
3080 | } |
3081 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); | |
3082 | ||
863a3c6c | 3083 | void |
67af7611 TM |
3084 | pnfs_set_layoutcommit(struct inode *inode, struct pnfs_layout_segment *lseg, |
3085 | loff_t end_pos) | |
863a3c6c | 3086 | { |
cd841605 | 3087 | struct nfs_inode *nfsi = NFS_I(inode); |
79a48a1f | 3088 | bool mark_as_dirty = false; |
863a3c6c | 3089 | |
cd841605 | 3090 | spin_lock(&inode->i_lock); |
863a3c6c | 3091 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
29559b11 | 3092 | nfsi->layout->plh_lwb = end_pos; |
79a48a1f | 3093 | mark_as_dirty = true; |
863a3c6c | 3094 | dprintk("%s: Set layoutcommit for inode %lu ", |
cd841605 | 3095 | __func__, inode->i_ino); |
29559b11 TM |
3096 | } else if (end_pos > nfsi->layout->plh_lwb) |
3097 | nfsi->layout->plh_lwb = end_pos; | |
67af7611 | 3098 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) { |
a9bae566 | 3099 | /* references matched in nfs4_layoutcommit_release */ |
67af7611 | 3100 | pnfs_get_lseg(lseg); |
a9bae566 | 3101 | } |
cd841605 | 3102 | spin_unlock(&inode->i_lock); |
acff5880 | 3103 | dprintk("%s: lseg %p end_pos %llu\n", |
67af7611 | 3104 | __func__, lseg, nfsi->layout->plh_lwb); |
79a48a1f WAA |
3105 | |
3106 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one | |
3107 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ | |
3108 | if (mark_as_dirty) | |
cd841605 | 3109 | mark_inode_dirty_sync(inode); |
863a3c6c AA |
3110 | } |
3111 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); | |
3112 | ||
db29c089 AA |
3113 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
3114 | { | |
3115 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); | |
3116 | ||
3117 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) | |
3118 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); | |
a073dbff | 3119 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
db29c089 AA |
3120 | } |
3121 | ||
de4b15c7 AA |
3122 | /* |
3123 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and | |
3124 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough | |
3125 | * data to disk to allow the server to recover the data if it crashes. | |
3126 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag | |
3127 | * is off, and a COMMIT is sent to a data server, or | |
3128 | * if WRITEs to a data server return NFS_DATA_SYNC. | |
3129 | */ | |
863a3c6c | 3130 | int |
ef311537 | 3131 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c | 3132 | { |
5f919c9f | 3133 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
863a3c6c AA |
3134 | struct nfs4_layoutcommit_data *data; |
3135 | struct nfs_inode *nfsi = NFS_I(inode); | |
863a3c6c | 3136 | loff_t end_pos; |
71244d9b | 3137 | int status; |
863a3c6c | 3138 | |
71244d9b | 3139 | if (!pnfs_layoutcommit_outstanding(inode)) |
de4b15c7 AA |
3140 | return 0; |
3141 | ||
71244d9b | 3142 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
92407e75 | 3143 | |
71244d9b | 3144 | status = -EAGAIN; |
92407e75 | 3145 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
71244d9b TM |
3146 | if (!sync) |
3147 | goto out; | |
74316201 | 3148 | status = wait_on_bit_lock_action(&nfsi->flags, |
71244d9b TM |
3149 | NFS_INO_LAYOUTCOMMITTING, |
3150 | nfs_wait_bit_killable, | |
3151 | TASK_KILLABLE); | |
92407e75 | 3152 | if (status) |
71244d9b | 3153 | goto out; |
92407e75 PT |
3154 | } |
3155 | ||
71244d9b TM |
3156 | status = -ENOMEM; |
3157 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ | |
3158 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
3159 | if (!data) | |
3160 | goto clear_layoutcommitting; | |
3161 | ||
3162 | status = 0; | |
de4b15c7 | 3163 | spin_lock(&inode->i_lock); |
71244d9b TM |
3164 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
3165 | goto out_unlock; | |
a9bae566 | 3166 | |
71244d9b | 3167 | INIT_LIST_HEAD(&data->lseg_list); |
a9bae566 | 3168 | pnfs_list_write_lseg(inode, &data->lseg_list); |
863a3c6c | 3169 | |
acff5880 | 3170 | end_pos = nfsi->layout->plh_lwb; |
863a3c6c | 3171 | |
f597c537 | 3172 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
97a728f5 | 3173 | data->cred = get_cred(nfsi->layout->plh_lc_cred); |
863a3c6c AA |
3174 | spin_unlock(&inode->i_lock); |
3175 | ||
3176 | data->args.inode = inode; | |
863a3c6c AA |
3177 | nfs_fattr_init(&data->fattr); |
3178 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; | |
3179 | data->res.fattr = &data->fattr; | |
2e18d4d8 TM |
3180 | if (end_pos != 0) |
3181 | data->args.lastbytewritten = end_pos - 1; | |
3182 | else | |
3183 | data->args.lastbytewritten = U64_MAX; | |
863a3c6c AA |
3184 | data->res.server = NFS_SERVER(inode); |
3185 | ||
5f919c9f CH |
3186 | if (ld->prepare_layoutcommit) { |
3187 | status = ld->prepare_layoutcommit(&data->args); | |
3188 | if (status) { | |
a52458b4 | 3189 | put_cred(data->cred); |
5f919c9f | 3190 | spin_lock(&inode->i_lock); |
29559b11 TM |
3191 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
3192 | if (end_pos > nfsi->layout->plh_lwb) | |
5f919c9f | 3193 | nfsi->layout->plh_lwb = end_pos; |
3471648a | 3194 | goto out_unlock; |
5f919c9f CH |
3195 | } |
3196 | } | |
3197 | ||
3198 | ||
863a3c6c AA |
3199 | status = nfs4_proc_layoutcommit(data, sync); |
3200 | out: | |
92407e75 PT |
3201 | if (status) |
3202 | mark_inode_dirty_sync(inode); | |
863a3c6c AA |
3203 | dprintk("<-- %s status %d\n", __func__, status); |
3204 | return status; | |
71244d9b TM |
3205 | out_unlock: |
3206 | spin_unlock(&inode->i_lock); | |
92407e75 | 3207 | kfree(data); |
71244d9b TM |
3208 | clear_layoutcommitting: |
3209 | pnfs_clear_layoutcommitting(inode); | |
92407e75 | 3210 | goto out; |
863a3c6c | 3211 | } |
72cff449 | 3212 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
82be417a | 3213 | |
5bb89b47 TM |
3214 | int |
3215 | pnfs_generic_sync(struct inode *inode, bool datasync) | |
3216 | { | |
3217 | return pnfs_layoutcommit_inode(inode, true); | |
3218 | } | |
3219 | EXPORT_SYMBOL_GPL(pnfs_generic_sync); | |
3220 | ||
82be417a AA |
3221 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
3222 | { | |
3223 | struct nfs4_threshold *thp; | |
3224 | ||
3225 | thp = kzalloc(sizeof(*thp), GFP_NOFS); | |
3226 | if (!thp) { | |
3227 | dprintk("%s mdsthreshold allocation failed\n", __func__); | |
3228 | return NULL; | |
3229 | } | |
3230 | return thp; | |
3231 | } | |
8733408d | 3232 | |
865a7ecb | 3233 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
8733408d | 3234 | int |
c8ad8894 | 3235 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
8733408d PT |
3236 | { |
3237 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
3238 | struct nfs_server *server = NFS_SERVER(inode); | |
1bfe3b25 | 3239 | struct nfs_inode *nfsi = NFS_I(inode); |
8733408d PT |
3240 | struct nfs42_layoutstat_data *data; |
3241 | struct pnfs_layout_hdr *hdr; | |
3242 | int status = 0; | |
3243 | ||
3244 | if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats) | |
3245 | goto out; | |
3246 | ||
6c5a0d89 TM |
3247 | if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS)) |
3248 | goto out; | |
3249 | ||
1bfe3b25 PT |
3250 | if (test_and_set_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags)) |
3251 | goto out; | |
3252 | ||
8733408d PT |
3253 | spin_lock(&inode->i_lock); |
3254 | if (!NFS_I(inode)->layout) { | |
3255 | spin_unlock(&inode->i_lock); | |
f538d0ba | 3256 | goto out_clear_layoutstats; |
8733408d PT |
3257 | } |
3258 | hdr = NFS_I(inode)->layout; | |
3259 | pnfs_get_layout_hdr(hdr); | |
3260 | spin_unlock(&inode->i_lock); | |
3261 | ||
c8ad8894 | 3262 | data = kzalloc(sizeof(*data), gfp_flags); |
8733408d PT |
3263 | if (!data) { |
3264 | status = -ENOMEM; | |
3265 | goto out_put; | |
3266 | } | |
3267 | ||
3268 | data->args.fh = NFS_FH(inode); | |
3269 | data->args.inode = inode; | |
8733408d PT |
3270 | status = ld->prepare_layoutstats(&data->args); |
3271 | if (status) | |
3272 | goto out_free; | |
3273 | ||
3274 | status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data); | |
3275 | ||
3276 | out: | |
3277 | dprintk("%s returns %d\n", __func__, status); | |
3278 | return status; | |
3279 | ||
3280 | out_free: | |
3281 | kfree(data); | |
3282 | out_put: | |
3283 | pnfs_put_layout_hdr(hdr); | |
f538d0ba | 3284 | out_clear_layoutstats: |
1bfe3b25 PT |
3285 | smp_mb__before_atomic(); |
3286 | clear_bit(NFS_INO_LAYOUTSTATS, &nfsi->flags); | |
3287 | smp_mb__after_atomic(); | |
8733408d PT |
3288 | goto out; |
3289 | } | |
3290 | EXPORT_SYMBOL_GPL(pnfs_report_layoutstat); | |
865a7ecb | 3291 | #endif |
bbf58bf3 TM |
3292 | |
3293 | unsigned int layoutstats_timer; | |
3294 | module_param(layoutstats_timer, uint, 0644); | |
3295 | EXPORT_SYMBOL_GPL(layoutstats_timer); |