Commit | Line | Data |
---|---|---|
d67ae825 TH |
1 | /* |
2 | * Module for pnfs flexfile layout driver. | |
3 | * | |
4 | * Copyright (c) 2014, Primary Data, Inc. All rights reserved. | |
5 | * | |
6 | * Tao Peng <bergwolf@primarydata.com> | |
7 | */ | |
8 | ||
9 | #include <linux/nfs_fs.h> | |
10 | #include <linux/nfs_page.h> | |
11 | #include <linux/module.h> | |
12 | ||
13 | #include <linux/sunrpc/metrics.h> | |
d67ae825 TH |
14 | |
15 | #include "flexfilelayout.h" | |
16 | #include "../nfs4session.h" | |
40c64c26 | 17 | #include "../nfs4idmap.h" |
d67ae825 TH |
18 | #include "../internal.h" |
19 | #include "../delegation.h" | |
20 | #include "../nfs4trace.h" | |
21 | #include "../iostat.h" | |
22 | #include "../nfs.h" | |
ad4dc53e | 23 | #include "../nfs42.h" |
d67ae825 TH |
24 | |
25 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
26 | ||
27 | #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ) | |
5b9b3c85 TM |
28 | #define FF_LAYOUTRETURN_MAXERR 20 |
29 | ||
d67ae825 | 30 | |
90a0be00 JL |
31 | static struct group_info *ff_zero_group; |
32 | ||
54e4a0df TM |
33 | static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, |
34 | struct nfs_pgio_header *hdr); | |
230bc962 TM |
35 | static int ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo, |
36 | struct nfs42_layoutstat_devinfo *devinfo, | |
37 | int dev_limit); | |
38 | static void ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr, | |
39 | const struct nfs42_layoutstat_devinfo *devinfo, | |
40 | struct nfs4_ff_layout_mirror *mirror); | |
54e4a0df | 41 | |
d67ae825 TH |
42 | static struct pnfs_layout_hdr * |
43 | ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
44 | { | |
45 | struct nfs4_flexfile_layout *ffl; | |
46 | ||
47 | ffl = kzalloc(sizeof(*ffl), gfp_flags); | |
48 | if (ffl) { | |
49 | INIT_LIST_HEAD(&ffl->error_list); | |
266d12d4 | 50 | INIT_LIST_HEAD(&ffl->mirrors); |
1c8d477a | 51 | ffl->last_report_time = ktime_get(); |
d67ae825 TH |
52 | return &ffl->generic_hdr; |
53 | } else | |
54 | return NULL; | |
55 | } | |
56 | ||
57 | static void | |
58 | ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
59 | { | |
60 | struct nfs4_ff_layout_ds_err *err, *n; | |
61 | ||
62 | list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list, | |
63 | list) { | |
64 | list_del(&err->list); | |
65 | kfree(err); | |
66 | } | |
67 | kfree(FF_LAYOUT_FROM_HDR(lo)); | |
68 | } | |
69 | ||
93b717fd | 70 | static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
d67ae825 TH |
71 | { |
72 | __be32 *p; | |
73 | ||
74 | p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE); | |
75 | if (unlikely(p == NULL)) | |
76 | return -ENOBUFS; | |
93b717fd TM |
77 | stateid->type = NFS4_PNFS_DS_STATEID_TYPE; |
78 | memcpy(stateid->data, p, NFS4_STATEID_SIZE); | |
d67ae825 TH |
79 | dprintk("%s: stateid id= [%x%x%x%x]\n", __func__, |
80 | p[0], p[1], p[2], p[3]); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid) | |
85 | { | |
86 | __be32 *p; | |
87 | ||
88 | p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE); | |
89 | if (unlikely(!p)) | |
90 | return -ENOBUFS; | |
91 | memcpy(devid, p, NFS4_DEVICEID4_SIZE); | |
92 | nfs4_print_deviceid(devid); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh) | |
97 | { | |
98 | __be32 *p; | |
99 | ||
100 | p = xdr_inline_decode(xdr, 4); | |
101 | if (unlikely(!p)) | |
102 | return -ENOBUFS; | |
103 | fh->size = be32_to_cpup(p++); | |
104 | if (fh->size > sizeof(struct nfs_fh)) { | |
105 | printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n", | |
106 | fh->size); | |
107 | return -EOVERFLOW; | |
108 | } | |
109 | /* fh.data */ | |
110 | p = xdr_inline_decode(xdr, fh->size); | |
111 | if (unlikely(!p)) | |
112 | return -ENOBUFS; | |
113 | memcpy(&fh->data, p, fh->size); | |
114 | dprintk("%s: fh len %d\n", __func__, fh->size); | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | /* | |
120 | * Currently only stringified uids and gids are accepted. | |
121 | * I.e., kerberos is not supported to the DSes, so no pricipals. | |
122 | * | |
123 | * That means that one common function will suffice, but when | |
124 | * principals are added, this should be split to accomodate | |
125 | * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid(). | |
126 | */ | |
127 | static int | |
128 | decode_name(struct xdr_stream *xdr, u32 *id) | |
129 | { | |
130 | __be32 *p; | |
131 | int len; | |
132 | ||
133 | /* opaque_length(4)*/ | |
134 | p = xdr_inline_decode(xdr, 4); | |
135 | if (unlikely(!p)) | |
136 | return -ENOBUFS; | |
137 | len = be32_to_cpup(p++); | |
138 | if (len < 0) | |
139 | return -EINVAL; | |
140 | ||
141 | dprintk("%s: len %u\n", __func__, len); | |
142 | ||
143 | /* opaque body */ | |
144 | p = xdr_inline_decode(xdr, len); | |
145 | if (unlikely(!p)) | |
146 | return -ENOBUFS; | |
147 | ||
148 | if (!nfs_map_string_to_numeric((char *)p, len, id)) | |
149 | return -EINVAL; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
266d12d4 TM |
154 | static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1, |
155 | const struct nfs4_ff_layout_mirror *m2) | |
156 | { | |
157 | int i, j; | |
158 | ||
159 | if (m1->fh_versions_cnt != m2->fh_versions_cnt) | |
160 | return false; | |
161 | for (i = 0; i < m1->fh_versions_cnt; i++) { | |
162 | bool found_fh = false; | |
86fb449b | 163 | for (j = 0; j < m2->fh_versions_cnt; j++) { |
266d12d4 TM |
164 | if (nfs_compare_fh(&m1->fh_versions[i], |
165 | &m2->fh_versions[j]) == 0) { | |
166 | found_fh = true; | |
167 | break; | |
168 | } | |
169 | } | |
170 | if (!found_fh) | |
171 | return false; | |
172 | } | |
173 | return true; | |
174 | } | |
175 | ||
176 | static struct nfs4_ff_layout_mirror * | |
177 | ff_layout_add_mirror(struct pnfs_layout_hdr *lo, | |
178 | struct nfs4_ff_layout_mirror *mirror) | |
179 | { | |
180 | struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); | |
181 | struct nfs4_ff_layout_mirror *pos; | |
182 | struct inode *inode = lo->plh_inode; | |
183 | ||
184 | spin_lock(&inode->i_lock); | |
185 | list_for_each_entry(pos, &ff_layout->mirrors, mirrors) { | |
65990d1a | 186 | if (memcmp(&mirror->devid, &pos->devid, sizeof(pos->devid)) != 0) |
266d12d4 TM |
187 | continue; |
188 | if (!ff_mirror_match_fh(mirror, pos)) | |
189 | continue; | |
81a090b9 | 190 | if (refcount_inc_not_zero(&pos->ref)) { |
266d12d4 TM |
191 | spin_unlock(&inode->i_lock); |
192 | return pos; | |
193 | } | |
194 | } | |
195 | list_add(&mirror->mirrors, &ff_layout->mirrors); | |
196 | mirror->layout = lo; | |
197 | spin_unlock(&inode->i_lock); | |
198 | return mirror; | |
199 | } | |
200 | ||
e3b1df2d | 201 | static void |
266d12d4 TM |
202 | ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror) |
203 | { | |
204 | struct inode *inode; | |
205 | if (mirror->layout == NULL) | |
206 | return; | |
207 | inode = mirror->layout->plh_inode; | |
208 | spin_lock(&inode->i_lock); | |
209 | list_del(&mirror->mirrors); | |
210 | spin_unlock(&inode->i_lock); | |
211 | mirror->layout = NULL; | |
212 | } | |
213 | ||
28a0d72c TM |
214 | static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags) |
215 | { | |
216 | struct nfs4_ff_layout_mirror *mirror; | |
217 | ||
218 | mirror = kzalloc(sizeof(*mirror), gfp_flags); | |
219 | if (mirror != NULL) { | |
220 | spin_lock_init(&mirror->lock); | |
81a090b9 | 221 | refcount_set(&mirror->ref, 1); |
266d12d4 | 222 | INIT_LIST_HEAD(&mirror->mirrors); |
28a0d72c TM |
223 | } |
224 | return mirror; | |
225 | } | |
226 | ||
227 | static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror) | |
228 | { | |
3064b686 JL |
229 | struct rpc_cred *cred; |
230 | ||
266d12d4 | 231 | ff_layout_remove_mirror(mirror); |
28a0d72c | 232 | kfree(mirror->fh_versions); |
3064b686 JL |
233 | cred = rcu_access_pointer(mirror->ro_cred); |
234 | if (cred) | |
235 | put_rpccred(cred); | |
236 | cred = rcu_access_pointer(mirror->rw_cred); | |
237 | if (cred) | |
238 | put_rpccred(cred); | |
28a0d72c TM |
239 | nfs4_ff_layout_put_deviceid(mirror->mirror_ds); |
240 | kfree(mirror); | |
241 | } | |
242 | ||
243 | static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror) | |
244 | { | |
81a090b9 | 245 | if (mirror != NULL && refcount_dec_and_test(&mirror->ref)) |
28a0d72c TM |
246 | ff_layout_free_mirror(mirror); |
247 | } | |
248 | ||
d67ae825 TH |
249 | static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls) |
250 | { | |
251 | int i; | |
252 | ||
253 | if (fls->mirror_array) { | |
254 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
255 | /* normally mirror_ds is freed in | |
256 | * .free_deviceid_node but we still do it here | |
257 | * for .alloc_lseg error path */ | |
28a0d72c | 258 | ff_layout_put_mirror(fls->mirror_array[i]); |
d67ae825 TH |
259 | } |
260 | kfree(fls->mirror_array); | |
261 | fls->mirror_array = NULL; | |
262 | } | |
263 | } | |
264 | ||
265 | static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr) | |
266 | { | |
267 | int ret = 0; | |
268 | ||
269 | dprintk("--> %s\n", __func__); | |
270 | ||
271 | /* FIXME: remove this check when layout segment support is added */ | |
272 | if (lgr->range.offset != 0 || | |
273 | lgr->range.length != NFS4_MAX_UINT64) { | |
274 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
275 | __func__); | |
276 | ret = -EINVAL; | |
277 | } | |
278 | ||
279 | dprintk("--> %s returns %d\n", __func__, ret); | |
280 | return ret; | |
281 | } | |
282 | ||
283 | static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) | |
284 | { | |
285 | if (fls) { | |
286 | ff_layout_free_mirror_array(fls); | |
287 | kfree(fls); | |
288 | } | |
289 | } | |
290 | ||
0762ed2c TM |
291 | static bool |
292 | ff_lseg_range_is_after(const struct pnfs_layout_range *l1, | |
293 | const struct pnfs_layout_range *l2) | |
294 | { | |
295 | u64 end1, end2; | |
296 | ||
297 | if (l1->iomode != l2->iomode) | |
298 | return l1->iomode != IOMODE_READ; | |
299 | end1 = pnfs_calc_offset_end(l1->offset, l1->length); | |
300 | end2 = pnfs_calc_offset_end(l2->offset, l2->length); | |
301 | if (end1 < l2->offset) | |
302 | return false; | |
303 | if (end2 < l1->offset) | |
304 | return true; | |
305 | return l2->offset <= l1->offset; | |
306 | } | |
307 | ||
308 | static bool | |
309 | ff_lseg_merge(struct pnfs_layout_segment *new, | |
310 | struct pnfs_layout_segment *old) | |
311 | { | |
312 | u64 new_end, old_end; | |
313 | ||
ee26bdd6 JL |
314 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags)) |
315 | return false; | |
0762ed2c TM |
316 | if (new->pls_range.iomode != old->pls_range.iomode) |
317 | return false; | |
318 | old_end = pnfs_calc_offset_end(old->pls_range.offset, | |
319 | old->pls_range.length); | |
320 | if (old_end < new->pls_range.offset) | |
321 | return false; | |
322 | new_end = pnfs_calc_offset_end(new->pls_range.offset, | |
323 | new->pls_range.length); | |
324 | if (new_end < old->pls_range.offset) | |
325 | return false; | |
326 | ||
327 | /* Mergeable: copy info from 'old' to 'new' */ | |
328 | if (new_end < old_end) | |
329 | new_end = old_end; | |
330 | if (new->pls_range.offset < old->pls_range.offset) | |
331 | new->pls_range.offset = old->pls_range.offset; | |
332 | new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset, | |
333 | new_end); | |
334 | if (test_bit(NFS_LSEG_ROC, &old->pls_flags)) | |
335 | set_bit(NFS_LSEG_ROC, &new->pls_flags); | |
0762ed2c TM |
336 | return true; |
337 | } | |
338 | ||
339 | static void | |
340 | ff_layout_add_lseg(struct pnfs_layout_hdr *lo, | |
341 | struct pnfs_layout_segment *lseg, | |
342 | struct list_head *free_me) | |
343 | { | |
344 | pnfs_generic_layout_insert_lseg(lo, lseg, | |
345 | ff_lseg_range_is_after, | |
346 | ff_lseg_merge, | |
347 | free_me); | |
348 | } | |
349 | ||
d67ae825 TH |
350 | static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls) |
351 | { | |
d67ae825 TH |
352 | int i, j; |
353 | ||
354 | for (i = 0; i < fls->mirror_array_cnt - 1; i++) { | |
355 | for (j = i + 1; j < fls->mirror_array_cnt; j++) | |
356 | if (fls->mirror_array[i]->efficiency < | |
455b6ee6 FF |
357 | fls->mirror_array[j]->efficiency) |
358 | swap(fls->mirror_array[i], | |
359 | fls->mirror_array[j]); | |
d67ae825 TH |
360 | } |
361 | } | |
362 | ||
363 | static struct pnfs_layout_segment * | |
364 | ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, | |
365 | struct nfs4_layoutget_res *lgr, | |
366 | gfp_t gfp_flags) | |
367 | { | |
368 | struct pnfs_layout_segment *ret; | |
369 | struct nfs4_ff_layout_segment *fls = NULL; | |
370 | struct xdr_stream stream; | |
371 | struct xdr_buf buf; | |
372 | struct page *scratch; | |
373 | u64 stripe_unit; | |
374 | u32 mirror_array_cnt; | |
375 | __be32 *p; | |
376 | int i, rc; | |
377 | ||
378 | dprintk("--> %s\n", __func__); | |
379 | scratch = alloc_page(gfp_flags); | |
380 | if (!scratch) | |
381 | return ERR_PTR(-ENOMEM); | |
382 | ||
383 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, | |
384 | lgr->layoutp->len); | |
385 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); | |
386 | ||
387 | /* stripe unit and mirror_array_cnt */ | |
388 | rc = -EIO; | |
389 | p = xdr_inline_decode(&stream, 8 + 4); | |
390 | if (!p) | |
391 | goto out_err_free; | |
392 | ||
393 | p = xdr_decode_hyper(p, &stripe_unit); | |
394 | mirror_array_cnt = be32_to_cpup(p++); | |
395 | dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, | |
396 | stripe_unit, mirror_array_cnt); | |
397 | ||
398 | if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || | |
399 | mirror_array_cnt == 0) | |
400 | goto out_err_free; | |
401 | ||
402 | rc = -ENOMEM; | |
403 | fls = kzalloc(sizeof(*fls), gfp_flags); | |
404 | if (!fls) | |
405 | goto out_err_free; | |
406 | ||
407 | fls->mirror_array_cnt = mirror_array_cnt; | |
408 | fls->stripe_unit = stripe_unit; | |
409 | fls->mirror_array = kcalloc(fls->mirror_array_cnt, | |
410 | sizeof(fls->mirror_array[0]), gfp_flags); | |
411 | if (fls->mirror_array == NULL) | |
412 | goto out_err_free; | |
413 | ||
414 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
266d12d4 | 415 | struct nfs4_ff_layout_mirror *mirror; |
90a0be00 | 416 | struct auth_cred acred = { .group_info = ff_zero_group }; |
3064b686 | 417 | struct rpc_cred __rcu *cred; |
90a0be00 | 418 | u32 ds_count, fh_count, id; |
d67ae825 TH |
419 | int j; |
420 | ||
421 | rc = -EIO; | |
422 | p = xdr_inline_decode(&stream, 4); | |
423 | if (!p) | |
424 | goto out_err_free; | |
425 | ds_count = be32_to_cpup(p); | |
426 | ||
427 | /* FIXME: allow for striping? */ | |
428 | if (ds_count != 1) | |
429 | goto out_err_free; | |
430 | ||
28a0d72c | 431 | fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags); |
d67ae825 TH |
432 | if (fls->mirror_array[i] == NULL) { |
433 | rc = -ENOMEM; | |
434 | goto out_err_free; | |
435 | } | |
436 | ||
d67ae825 TH |
437 | fls->mirror_array[i]->ds_count = ds_count; |
438 | ||
439 | /* deviceid */ | |
65990d1a | 440 | rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid); |
d67ae825 TH |
441 | if (rc) |
442 | goto out_err_free; | |
443 | ||
d67ae825 TH |
444 | /* efficiency */ |
445 | rc = -EIO; | |
446 | p = xdr_inline_decode(&stream, 4); | |
447 | if (!p) | |
448 | goto out_err_free; | |
449 | fls->mirror_array[i]->efficiency = be32_to_cpup(p); | |
450 | ||
451 | /* stateid */ | |
93b717fd | 452 | rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid); |
d67ae825 TH |
453 | if (rc) |
454 | goto out_err_free; | |
455 | ||
456 | /* fh */ | |
662f9a10 | 457 | rc = -EIO; |
d67ae825 TH |
458 | p = xdr_inline_decode(&stream, 4); |
459 | if (!p) | |
460 | goto out_err_free; | |
461 | fh_count = be32_to_cpup(p); | |
462 | ||
463 | fls->mirror_array[i]->fh_versions = | |
6396bb22 | 464 | kcalloc(fh_count, sizeof(struct nfs_fh), |
d67ae825 TH |
465 | gfp_flags); |
466 | if (fls->mirror_array[i]->fh_versions == NULL) { | |
467 | rc = -ENOMEM; | |
468 | goto out_err_free; | |
469 | } | |
470 | ||
471 | for (j = 0; j < fh_count; j++) { | |
472 | rc = decode_nfs_fh(&stream, | |
473 | &fls->mirror_array[i]->fh_versions[j]); | |
474 | if (rc) | |
475 | goto out_err_free; | |
476 | } | |
477 | ||
478 | fls->mirror_array[i]->fh_versions_cnt = fh_count; | |
479 | ||
480 | /* user */ | |
90a0be00 | 481 | rc = decode_name(&stream, &id); |
d67ae825 TH |
482 | if (rc) |
483 | goto out_err_free; | |
484 | ||
90a0be00 JL |
485 | acred.uid = make_kuid(&init_user_ns, id); |
486 | ||
d67ae825 | 487 | /* group */ |
90a0be00 | 488 | rc = decode_name(&stream, &id); |
d67ae825 TH |
489 | if (rc) |
490 | goto out_err_free; | |
491 | ||
90a0be00 JL |
492 | acred.gid = make_kgid(&init_user_ns, id); |
493 | ||
494 | /* find the cred for it */ | |
3064b686 | 495 | rcu_assign_pointer(cred, rpc_lookup_generic_cred(&acred, 0, gfp_flags)); |
90a0be00 JL |
496 | if (IS_ERR(cred)) { |
497 | rc = PTR_ERR(cred); | |
498 | goto out_err_free; | |
499 | } | |
500 | ||
3064b686 JL |
501 | if (lgr->range.iomode == IOMODE_READ) |
502 | rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); | |
503 | else | |
504 | rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); | |
90a0be00 | 505 | |
266d12d4 TM |
506 | mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]); |
507 | if (mirror != fls->mirror_array[i]) { | |
90a0be00 | 508 | /* swap cred ptrs so free_mirror will clean up old */ |
3064b686 JL |
509 | if (lgr->range.iomode == IOMODE_READ) { |
510 | cred = xchg(&mirror->ro_cred, cred); | |
511 | rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); | |
512 | } else { | |
513 | cred = xchg(&mirror->rw_cred, cred); | |
514 | rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); | |
515 | } | |
266d12d4 TM |
516 | ff_layout_free_mirror(fls->mirror_array[i]); |
517 | fls->mirror_array[i] = mirror; | |
518 | } | |
519 | ||
3064b686 JL |
520 | dprintk("%s: iomode %s uid %u gid %u\n", __func__, |
521 | lgr->range.iomode == IOMODE_READ ? "READ" : "RW", | |
90a0be00 JL |
522 | from_kuid(&init_user_ns, acred.uid), |
523 | from_kgid(&init_user_ns, acred.gid)); | |
d67ae825 TH |
524 | } |
525 | ||
c0f5f505 | 526 | p = xdr_inline_decode(&stream, 4); |
d0379a5d TM |
527 | if (!p) |
528 | goto out_sort_mirrors; | |
529 | fls->flags = be32_to_cpup(p); | |
530 | ||
531 | p = xdr_inline_decode(&stream, 4); | |
532 | if (!p) | |
533 | goto out_sort_mirrors; | |
534 | for (i=0; i < fls->mirror_array_cnt; i++) | |
535 | fls->mirror_array[i]->report_interval = be32_to_cpup(p); | |
c0f5f505 | 536 | |
d0379a5d | 537 | out_sort_mirrors: |
d67ae825 TH |
538 | ff_layout_sort_mirrors(fls); |
539 | rc = ff_layout_check_layout(lgr); | |
540 | if (rc) | |
541 | goto out_err_free; | |
d67ae825 TH |
542 | ret = &fls->generic_hdr; |
543 | dprintk("<-- %s (success)\n", __func__); | |
544 | out_free_page: | |
545 | __free_page(scratch); | |
546 | return ret; | |
547 | out_err_free: | |
548 | _ff_layout_free_lseg(fls); | |
549 | ret = ERR_PTR(rc); | |
550 | dprintk("<-- %s (%d)\n", __func__, rc); | |
551 | goto out_free_page; | |
552 | } | |
553 | ||
554 | static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout) | |
555 | { | |
556 | struct pnfs_layout_segment *lseg; | |
557 | ||
558 | list_for_each_entry(lseg, &layout->plh_segs, pls_list) | |
559 | if (lseg->pls_range.iomode == IOMODE_RW) | |
560 | return true; | |
561 | ||
562 | return false; | |
563 | } | |
564 | ||
565 | static void | |
566 | ff_layout_free_lseg(struct pnfs_layout_segment *lseg) | |
567 | { | |
568 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
d67ae825 TH |
569 | |
570 | dprintk("--> %s\n", __func__); | |
571 | ||
d67ae825 TH |
572 | if (lseg->pls_range.iomode == IOMODE_RW) { |
573 | struct nfs4_flexfile_layout *ffl; | |
574 | struct inode *inode; | |
575 | ||
576 | ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); | |
577 | inode = ffl->generic_hdr.plh_inode; | |
578 | spin_lock(&inode->i_lock); | |
579 | if (!ff_layout_has_rw_segments(lseg->pls_layout)) { | |
580 | ffl->commit_info.nbuckets = 0; | |
581 | kfree(ffl->commit_info.buckets); | |
582 | ffl->commit_info.buckets = NULL; | |
583 | } | |
584 | spin_unlock(&inode->i_lock); | |
585 | } | |
586 | _ff_layout_free_lseg(fls); | |
587 | } | |
588 | ||
589 | /* Return 1 until we have multiple lsegs support */ | |
590 | static int | |
591 | ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls) | |
592 | { | |
593 | return 1; | |
594 | } | |
595 | ||
abcb7bfc | 596 | static void |
e76d28dd | 597 | nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
abcb7bfc | 598 | { |
9bbd9bb4 PT |
599 | /* first IO request? */ |
600 | if (atomic_inc_return(&timer->n_ops) == 1) { | |
e76d28dd | 601 | timer->start_time = now; |
abcb7bfc TM |
602 | } |
603 | } | |
604 | ||
605 | static ktime_t | |
e76d28dd | 606 | nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
abcb7bfc | 607 | { |
e76d28dd | 608 | ktime_t start; |
abcb7bfc | 609 | |
9bbd9bb4 PT |
610 | if (atomic_dec_return(&timer->n_ops) < 0) |
611 | WARN_ON_ONCE(1); | |
612 | ||
9bbd9bb4 PT |
613 | start = timer->start_time; |
614 | timer->start_time = now; | |
abcb7bfc TM |
615 | return ktime_sub(now, start); |
616 | } | |
617 | ||
97ba375b | 618 | static bool |
d983803d | 619 | nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, |
e76d28dd TM |
620 | struct nfs4_ff_layoutstat *layoutstat, |
621 | ktime_t now) | |
abcb7bfc | 622 | { |
bbf58bf3 | 623 | s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL; |
1c8d477a | 624 | struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout); |
d983803d | 625 | |
e76d28dd | 626 | nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now); |
1f3a8e49 | 627 | if (!mirror->start_time) |
9bbd9bb4 | 628 | mirror->start_time = now; |
d0379a5d TM |
629 | if (mirror->report_interval != 0) |
630 | report_interval = (s64)mirror->report_interval * 1000LL; | |
631 | else if (layoutstats_timer != 0) | |
bbf58bf3 | 632 | report_interval = (s64)layoutstats_timer * 1000LL; |
1c8d477a | 633 | if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >= |
bbf58bf3 | 634 | report_interval) { |
1c8d477a | 635 | ffl->last_report_time = now; |
97ba375b PT |
636 | return true; |
637 | } | |
638 | ||
639 | return false; | |
abcb7bfc TM |
640 | } |
641 | ||
642 | static void | |
643 | nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat, | |
644 | __u64 requested) | |
645 | { | |
646 | struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; | |
647 | ||
648 | iostat->ops_requested++; | |
649 | iostat->bytes_requested += requested; | |
650 | } | |
651 | ||
652 | static void | |
653 | nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, | |
654 | __u64 requested, | |
655 | __u64 completed, | |
e76d28dd TM |
656 | ktime_t time_completed, |
657 | ktime_t time_started) | |
abcb7bfc TM |
658 | { |
659 | struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; | |
e76d28dd | 660 | ktime_t completion_time = ktime_sub(time_completed, time_started); |
abcb7bfc TM |
661 | ktime_t timer; |
662 | ||
663 | iostat->ops_completed++; | |
664 | iostat->bytes_completed += completed; | |
665 | iostat->bytes_not_delivered += requested - completed; | |
666 | ||
e76d28dd | 667 | timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed); |
abcb7bfc TM |
668 | iostat->total_busy_time = |
669 | ktime_add(iostat->total_busy_time, timer); | |
670 | iostat->aggregate_completion_time = | |
e76d28dd TM |
671 | ktime_add(iostat->aggregate_completion_time, |
672 | completion_time); | |
abcb7bfc TM |
673 | } |
674 | ||
675 | static void | |
0b7baf94 TM |
676 | nfs4_ff_layout_stat_io_start_read(struct inode *inode, |
677 | struct nfs4_ff_layout_mirror *mirror, | |
e76d28dd | 678 | __u64 requested, ktime_t now) |
abcb7bfc | 679 | { |
97ba375b PT |
680 | bool report; |
681 | ||
abcb7bfc | 682 | spin_lock(&mirror->lock); |
e76d28dd | 683 | report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now); |
abcb7bfc | 684 | nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested); |
06946c6a | 685 | set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
abcb7bfc | 686 | spin_unlock(&mirror->lock); |
97ba375b PT |
687 | |
688 | if (report) | |
0b7baf94 | 689 | pnfs_report_layoutstat(inode, GFP_KERNEL); |
abcb7bfc TM |
690 | } |
691 | ||
692 | static void | |
693 | nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, | |
694 | struct nfs4_ff_layout_mirror *mirror, | |
695 | __u64 requested, | |
696 | __u64 completed) | |
697 | { | |
698 | spin_lock(&mirror->lock); | |
699 | nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat, | |
700 | requested, completed, | |
e76d28dd | 701 | ktime_get(), task->tk_start); |
06946c6a | 702 | set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
abcb7bfc TM |
703 | spin_unlock(&mirror->lock); |
704 | } | |
705 | ||
706 | static void | |
0b7baf94 TM |
707 | nfs4_ff_layout_stat_io_start_write(struct inode *inode, |
708 | struct nfs4_ff_layout_mirror *mirror, | |
e76d28dd | 709 | __u64 requested, ktime_t now) |
abcb7bfc | 710 | { |
97ba375b PT |
711 | bool report; |
712 | ||
abcb7bfc | 713 | spin_lock(&mirror->lock); |
e76d28dd | 714 | report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now); |
abcb7bfc | 715 | nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested); |
06946c6a | 716 | set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
abcb7bfc | 717 | spin_unlock(&mirror->lock); |
97ba375b PT |
718 | |
719 | if (report) | |
0b7baf94 | 720 | pnfs_report_layoutstat(inode, GFP_NOIO); |
abcb7bfc TM |
721 | } |
722 | ||
723 | static void | |
724 | nfs4_ff_layout_stat_io_end_write(struct rpc_task *task, | |
725 | struct nfs4_ff_layout_mirror *mirror, | |
726 | __u64 requested, | |
727 | __u64 completed, | |
728 | enum nfs3_stable_how committed) | |
729 | { | |
730 | if (committed == NFS_UNSTABLE) | |
731 | requested = completed = 0; | |
732 | ||
733 | spin_lock(&mirror->lock); | |
734 | nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat, | |
e76d28dd | 735 | requested, completed, ktime_get(), task->tk_start); |
06946c6a | 736 | set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); |
abcb7bfc TM |
737 | spin_unlock(&mirror->lock); |
738 | } | |
739 | ||
d67ae825 TH |
740 | static int |
741 | ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg, | |
742 | struct nfs_commit_info *cinfo, | |
743 | gfp_t gfp_flags) | |
744 | { | |
745 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
746 | struct pnfs_commit_bucket *buckets; | |
747 | int size; | |
748 | ||
749 | if (cinfo->ds->nbuckets != 0) { | |
750 | /* This assumes there is only one RW lseg per file. | |
751 | * To support multiple lseg per file, we need to | |
752 | * change struct pnfs_commit_bucket to allow dynamic | |
753 | * increasing nbuckets. | |
754 | */ | |
755 | return 0; | |
756 | } | |
757 | ||
758 | size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg); | |
759 | ||
760 | buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), | |
761 | gfp_flags); | |
762 | if (!buckets) | |
763 | return -ENOMEM; | |
764 | else { | |
765 | int i; | |
766 | ||
fe238e60 | 767 | spin_lock(&cinfo->inode->i_lock); |
d67ae825 TH |
768 | if (cinfo->ds->nbuckets != 0) |
769 | kfree(buckets); | |
770 | else { | |
771 | cinfo->ds->buckets = buckets; | |
772 | cinfo->ds->nbuckets = size; | |
773 | for (i = 0; i < size; i++) { | |
774 | INIT_LIST_HEAD(&buckets[i].written); | |
775 | INIT_LIST_HEAD(&buckets[i].committing); | |
776 | /* mark direct verifier as unset */ | |
777 | buckets[i].direct_verf.committed = | |
778 | NFS_INVALID_STABLE_HOW; | |
779 | } | |
780 | } | |
fe238e60 | 781 | spin_unlock(&cinfo->inode->i_lock); |
d67ae825 TH |
782 | return 0; |
783 | } | |
784 | } | |
785 | ||
786 | static struct nfs4_pnfs_ds * | |
13544412 TM |
787 | ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg, |
788 | int start_idx, | |
d67ae825 TH |
789 | int *best_idx) |
790 | { | |
13544412 | 791 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); |
d67ae825 | 792 | struct nfs4_pnfs_ds *ds; |
3dc14735 | 793 | bool fail_return = false; |
d67ae825 TH |
794 | int idx; |
795 | ||
d67ae825 | 796 | /* mirrors are sorted by efficiency */ |
13544412 | 797 | for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) { |
3dc14735 TM |
798 | if (idx+1 == fls->mirror_array_cnt) |
799 | fail_return = true; | |
800 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, fail_return); | |
d67ae825 TH |
801 | if (ds) { |
802 | *best_idx = idx; | |
803 | return ds; | |
804 | } | |
805 | } | |
806 | ||
807 | return NULL; | |
808 | } | |
809 | ||
c7d73af2 TH |
810 | static void |
811 | ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio, | |
812 | struct nfs_page *req, | |
813 | bool strict_iomode) | |
814 | { | |
815 | retry_strict: | |
816 | pnfs_put_lseg(pgio->pg_lseg); | |
817 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
818 | req->wb_context, | |
819 | 0, | |
820 | NFS4_MAX_UINT64, | |
821 | IOMODE_READ, | |
822 | strict_iomode, | |
823 | GFP_KERNEL); | |
824 | if (IS_ERR(pgio->pg_lseg)) { | |
825 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
826 | pgio->pg_lseg = NULL; | |
827 | } | |
828 | ||
829 | /* If we don't have checking, do get a IOMODE_RW | |
830 | * segment, and the server wants to avoid READs | |
831 | * there, then retry! | |
832 | */ | |
833 | if (pgio->pg_lseg && !strict_iomode && | |
834 | ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { | |
835 | strict_iomode = true; | |
836 | goto retry_strict; | |
837 | } | |
838 | } | |
839 | ||
d67ae825 TH |
840 | static void |
841 | ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, | |
842 | struct nfs_page *req) | |
843 | { | |
844 | struct nfs_pgio_mirror *pgm; | |
845 | struct nfs4_ff_layout_mirror *mirror; | |
846 | struct nfs4_pnfs_ds *ds; | |
847 | int ds_idx; | |
848 | ||
3dc14735 | 849 | retry: |
b3230e80 | 850 | pnfs_generic_pg_check_layout(pgio); |
d67ae825 | 851 | /* Use full layout for now */ |
c7d73af2 TH |
852 | if (!pgio->pg_lseg) |
853 | ff_layout_pg_get_read(pgio, req, false); | |
854 | else if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) | |
855 | ff_layout_pg_get_read(pgio, req, true); | |
602c4cd4 | 856 | |
d67ae825 TH |
857 | /* If no lseg, fall back to read through mds */ |
858 | if (pgio->pg_lseg == NULL) | |
859 | goto out_mds; | |
860 | ||
13544412 | 861 | ds = ff_layout_choose_best_ds_for_read(pgio->pg_lseg, 0, &ds_idx); |
446ca219 | 862 | if (!ds) { |
3dc14735 | 863 | if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) |
446ca219 | 864 | goto out_mds; |
3dc14735 TM |
865 | pnfs_put_lseg(pgio->pg_lseg); |
866 | pgio->pg_lseg = NULL; | |
867 | /* Sleep for 1 second before retrying */ | |
868 | ssleep(1); | |
869 | goto retry; | |
446ca219 TH |
870 | } |
871 | ||
d67ae825 TH |
872 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); |
873 | ||
874 | pgio->pg_mirror_idx = ds_idx; | |
875 | ||
876 | /* read always uses only one mirror - idx 0 for pgio layer */ | |
877 | pgm = &pgio->pg_mirrors[0]; | |
878 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; | |
879 | ||
880 | return; | |
881 | out_mds: | |
882 | pnfs_put_lseg(pgio->pg_lseg); | |
883 | pgio->pg_lseg = NULL; | |
884 | nfs_pageio_reset_read_mds(pgio); | |
885 | } | |
886 | ||
887 | static void | |
888 | ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, | |
889 | struct nfs_page *req) | |
890 | { | |
891 | struct nfs4_ff_layout_mirror *mirror; | |
892 | struct nfs_pgio_mirror *pgm; | |
893 | struct nfs_commit_info cinfo; | |
894 | struct nfs4_pnfs_ds *ds; | |
895 | int i; | |
896 | int status; | |
897 | ||
3dc14735 | 898 | retry: |
b3230e80 | 899 | pnfs_generic_pg_check_layout(pgio); |
d600ad1f | 900 | if (!pgio->pg_lseg) { |
d67ae825 TH |
901 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
902 | req->wb_context, | |
903 | 0, | |
904 | NFS4_MAX_UINT64, | |
905 | IOMODE_RW, | |
c7d73af2 | 906 | false, |
d67ae825 | 907 | GFP_NOFS); |
d600ad1f PT |
908 | if (IS_ERR(pgio->pg_lseg)) { |
909 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
910 | pgio->pg_lseg = NULL; | |
911 | return; | |
912 | } | |
913 | } | |
d67ae825 TH |
914 | /* If no lseg, fall back to write through mds */ |
915 | if (pgio->pg_lseg == NULL) | |
916 | goto out_mds; | |
917 | ||
918 | nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); | |
919 | status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); | |
920 | if (status < 0) | |
921 | goto out_mds; | |
922 | ||
923 | /* Use a direct mapping of ds_idx to pgio mirror_idx */ | |
924 | if (WARN_ON_ONCE(pgio->pg_mirror_count != | |
925 | FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))) | |
926 | goto out_mds; | |
927 | ||
928 | for (i = 0; i < pgio->pg_mirror_count; i++) { | |
929 | ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true); | |
446ca219 | 930 | if (!ds) { |
3dc14735 | 931 | if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) |
446ca219 | 932 | goto out_mds; |
3dc14735 TM |
933 | pnfs_put_lseg(pgio->pg_lseg); |
934 | pgio->pg_lseg = NULL; | |
935 | /* Sleep for 1 second before retrying */ | |
936 | ssleep(1); | |
937 | goto retry; | |
446ca219 | 938 | } |
d67ae825 TH |
939 | pgm = &pgio->pg_mirrors[i]; |
940 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); | |
941 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize; | |
942 | } | |
943 | ||
944 | return; | |
945 | ||
946 | out_mds: | |
947 | pnfs_put_lseg(pgio->pg_lseg); | |
948 | pgio->pg_lseg = NULL; | |
949 | nfs_pageio_reset_write_mds(pgio); | |
950 | } | |
951 | ||
952 | static unsigned int | |
953 | ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, | |
954 | struct nfs_page *req) | |
955 | { | |
d600ad1f | 956 | if (!pgio->pg_lseg) { |
d67ae825 TH |
957 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
958 | req->wb_context, | |
959 | 0, | |
960 | NFS4_MAX_UINT64, | |
961 | IOMODE_RW, | |
c7d73af2 | 962 | false, |
d67ae825 | 963 | GFP_NOFS); |
d600ad1f PT |
964 | if (IS_ERR(pgio->pg_lseg)) { |
965 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
966 | pgio->pg_lseg = NULL; | |
967 | goto out; | |
968 | } | |
969 | } | |
d67ae825 TH |
970 | if (pgio->pg_lseg) |
971 | return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); | |
972 | ||
973 | /* no lseg means that pnfs is not in use, so no mirroring here */ | |
d67ae825 | 974 | nfs_pageio_reset_write_mds(pgio); |
d600ad1f | 975 | out: |
d67ae825 TH |
976 | return 1; |
977 | } | |
978 | ||
979 | static const struct nfs_pageio_ops ff_layout_pg_read_ops = { | |
980 | .pg_init = ff_layout_pg_init_read, | |
981 | .pg_test = pnfs_generic_pg_test, | |
982 | .pg_doio = pnfs_generic_pg_readpages, | |
983 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
984 | }; | |
985 | ||
986 | static const struct nfs_pageio_ops ff_layout_pg_write_ops = { | |
987 | .pg_init = ff_layout_pg_init_write, | |
988 | .pg_test = pnfs_generic_pg_test, | |
989 | .pg_doio = pnfs_generic_pg_writepages, | |
990 | .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, | |
991 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
992 | }; | |
993 | ||
994 | static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) | |
995 | { | |
996 | struct rpc_task *task = &hdr->task; | |
997 | ||
998 | pnfs_layoutcommit_inode(hdr->inode, false); | |
999 | ||
1000 | if (retry_pnfs) { | |
1001 | dprintk("%s Reset task %5u for i/o through pNFS " | |
1002 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
1003 | hdr->task.tk_pid, | |
1004 | hdr->inode->i_sb->s_id, | |
1005 | (unsigned long long)NFS_FILEID(hdr->inode), | |
1006 | hdr->args.count, | |
1007 | (unsigned long long)hdr->args.offset); | |
1008 | ||
dc602dd7 | 1009 | hdr->completion_ops->reschedule_io(hdr); |
d67ae825 TH |
1010 | return; |
1011 | } | |
1012 | ||
1013 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
1014 | dprintk("%s Reset task %5u for i/o through MDS " | |
1015 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
1016 | hdr->task.tk_pid, | |
1017 | hdr->inode->i_sb->s_id, | |
1018 | (unsigned long long)NFS_FILEID(hdr->inode), | |
1019 | hdr->args.count, | |
1020 | (unsigned long long)hdr->args.offset); | |
1021 | ||
1022 | task->tk_status = pnfs_write_done_resend_to_mds(hdr); | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | static void ff_layout_reset_read(struct nfs_pgio_header *hdr) | |
1027 | { | |
1028 | struct rpc_task *task = &hdr->task; | |
1029 | ||
1030 | pnfs_layoutcommit_inode(hdr->inode, false); | |
1031 | ||
1032 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
1033 | dprintk("%s Reset task %5u for i/o through MDS " | |
1034 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
1035 | hdr->task.tk_pid, | |
1036 | hdr->inode->i_sb->s_id, | |
1037 | (unsigned long long)NFS_FILEID(hdr->inode), | |
1038 | hdr->args.count, | |
1039 | (unsigned long long)hdr->args.offset); | |
1040 | ||
1041 | task->tk_status = pnfs_read_done_resend_to_mds(hdr); | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | static int ff_layout_async_handle_error_v4(struct rpc_task *task, | |
1046 | struct nfs4_state *state, | |
1047 | struct nfs_client *clp, | |
1048 | struct pnfs_layout_segment *lseg, | |
1049 | int idx) | |
1050 | { | |
1051 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
1052 | struct inode *inode = lo->plh_inode; | |
d67ae825 | 1053 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); |
d67ae825 TH |
1054 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; |
1055 | ||
d67ae825 | 1056 | switch (task->tk_status) { |
d67ae825 TH |
1057 | case -NFS4ERR_BADSESSION: |
1058 | case -NFS4ERR_BADSLOT: | |
1059 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1060 | case -NFS4ERR_DEADSESSION: | |
1061 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1062 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1063 | case -NFS4ERR_SEQ_MISORDERED: | |
1064 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
1065 | "flags 0x%x\n", __func__, task->tk_status, | |
1066 | clp->cl_exchange_flags); | |
1067 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); | |
1068 | break; | |
1069 | case -NFS4ERR_DELAY: | |
1070 | case -NFS4ERR_GRACE: | |
1071 | rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); | |
1072 | break; | |
1073 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
1074 | break; | |
1075 | /* Invalidate Layout errors */ | |
1076 | case -NFS4ERR_PNFS_NO_LAYOUT: | |
1077 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
1078 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
1079 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
1080 | case -NFS4ERR_FHEXPIRED: | |
1081 | case -NFS4ERR_WRONG_TYPE: | |
1082 | dprintk("%s Invalid layout error %d\n", __func__, | |
1083 | task->tk_status); | |
1084 | /* | |
1085 | * Destroy layout so new i/o will get a new layout. | |
1086 | * Layout will not be destroyed until all current lseg | |
1087 | * references are put. Mark layout as invalid to resend failed | |
1088 | * i/o and all i/o waiting on the slot table to the MDS until | |
1089 | * layout is destroyed and a new valid layout is obtained. | |
1090 | */ | |
1091 | pnfs_destroy_layout(NFS_I(inode)); | |
1092 | rpc_wake_up(&tbl->slot_tbl_waitq); | |
1093 | goto reset; | |
1094 | /* RPC connection errors */ | |
1095 | case -ECONNREFUSED: | |
1096 | case -EHOSTDOWN: | |
1097 | case -EHOSTUNREACH: | |
1098 | case -ENETUNREACH: | |
1099 | case -EIO: | |
1100 | case -ETIMEDOUT: | |
1101 | case -EPIPE: | |
1102 | dprintk("%s DS connection error %d\n", __func__, | |
1103 | task->tk_status); | |
1c48cee8 WAA |
1104 | nfs4_delete_deviceid(devid->ld, devid->nfs_client, |
1105 | &devid->deviceid); | |
d67ae825 TH |
1106 | rpc_wake_up(&tbl->slot_tbl_waitq); |
1107 | /* fall through */ | |
1108 | default: | |
3b13b4b3 | 1109 | if (ff_layout_avoid_mds_available_ds(lseg)) |
d67ae825 TH |
1110 | return -NFS4ERR_RESET_TO_PNFS; |
1111 | reset: | |
1112 | dprintk("%s Retry through MDS. Error %d\n", __func__, | |
1113 | task->tk_status); | |
1114 | return -NFS4ERR_RESET_TO_MDS; | |
1115 | } | |
d67ae825 TH |
1116 | task->tk_status = 0; |
1117 | return -EAGAIN; | |
d67ae825 TH |
1118 | } |
1119 | ||
1120 | /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ | |
1121 | static int ff_layout_async_handle_error_v3(struct rpc_task *task, | |
1122 | struct pnfs_layout_segment *lseg, | |
1123 | int idx) | |
1124 | { | |
1125 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
1126 | ||
90816d1d TM |
1127 | switch (task->tk_status) { |
1128 | /* File access problems. Don't mark the device as unavailable */ | |
1129 | case -EACCES: | |
1130 | case -ESTALE: | |
1131 | case -EISDIR: | |
1132 | case -EBADHANDLE: | |
1133 | case -ELOOP: | |
1134 | case -ENOSPC: | |
1135 | break; | |
1136 | case -EJUKEBOX: | |
1137 | nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); | |
1138 | goto out_retry; | |
1139 | default: | |
d67ae825 TH |
1140 | dprintk("%s DS connection error %d\n", __func__, |
1141 | task->tk_status); | |
1c48cee8 WAA |
1142 | nfs4_delete_deviceid(devid->ld, devid->nfs_client, |
1143 | &devid->deviceid); | |
d67ae825 | 1144 | } |
90816d1d TM |
1145 | /* FIXME: Need to prevent infinite looping here. */ |
1146 | return -NFS4ERR_RESET_TO_PNFS; | |
1147 | out_retry: | |
d67ae825 | 1148 | task->tk_status = 0; |
7eeea167 | 1149 | rpc_restart_call_prepare(task); |
d67ae825 TH |
1150 | rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
1151 | return -EAGAIN; | |
1152 | } | |
1153 | ||
1154 | static int ff_layout_async_handle_error(struct rpc_task *task, | |
1155 | struct nfs4_state *state, | |
1156 | struct nfs_client *clp, | |
1157 | struct pnfs_layout_segment *lseg, | |
1158 | int idx) | |
1159 | { | |
1160 | int vers = clp->cl_nfs_mod->rpc_vers->number; | |
1161 | ||
df3ab232 TM |
1162 | if (task->tk_status >= 0) |
1163 | return 0; | |
1164 | ||
1165 | /* Handle the case of an invalid layout segment */ | |
1166 | if (!pnfs_is_valid_lseg(lseg)) | |
1167 | return -NFS4ERR_RESET_TO_PNFS; | |
1168 | ||
d67ae825 TH |
1169 | switch (vers) { |
1170 | case 3: | |
1171 | return ff_layout_async_handle_error_v3(task, lseg, idx); | |
1172 | case 4: | |
1173 | return ff_layout_async_handle_error_v4(task, state, clp, | |
1174 | lseg, idx); | |
1175 | default: | |
1176 | /* should never happen */ | |
1177 | WARN_ON_ONCE(1); | |
1178 | return 0; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, | |
1183 | int idx, u64 offset, u64 length, | |
dd52128a | 1184 | u32 status, int opnum, int error) |
d67ae825 TH |
1185 | { |
1186 | struct nfs4_ff_layout_mirror *mirror; | |
1187 | int err; | |
1188 | ||
dd52128a TM |
1189 | if (status == 0) { |
1190 | switch (error) { | |
1191 | case -ETIMEDOUT: | |
1192 | case -EPFNOSUPPORT: | |
1193 | case -EPROTONOSUPPORT: | |
1194 | case -EOPNOTSUPP: | |
1195 | case -ECONNREFUSED: | |
1196 | case -ECONNRESET: | |
1197 | case -EHOSTDOWN: | |
1198 | case -EHOSTUNREACH: | |
1199 | case -ENETUNREACH: | |
1200 | case -EADDRINUSE: | |
1201 | case -ENOBUFS: | |
1202 | case -EPIPE: | |
1203 | case -EPERM: | |
1204 | status = NFS4ERR_NXIO; | |
1205 | break; | |
1206 | case -EACCES: | |
1207 | status = NFS4ERR_ACCESS; | |
1208 | break; | |
1209 | default: | |
1210 | return; | |
1211 | } | |
1212 | } | |
1213 | ||
c22eeb86 PT |
1214 | switch (status) { |
1215 | case NFS4ERR_DELAY: | |
1216 | case NFS4ERR_GRACE: | |
1217 | return; | |
1218 | default: | |
1219 | break; | |
1220 | } | |
1221 | ||
d67ae825 TH |
1222 | mirror = FF_LAYOUT_COMP(lseg, idx); |
1223 | err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), | |
1224 | mirror, offset, length, status, opnum, | |
1225 | GFP_NOIO); | |
f95c03b2 | 1226 | pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, lseg); |
d67ae825 TH |
1227 | dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); |
1228 | } | |
1229 | ||
1230 | /* NFS_PROTO call done callback routines */ | |
d67ae825 TH |
1231 | static int ff_layout_read_done_cb(struct rpc_task *task, |
1232 | struct nfs_pgio_header *hdr) | |
1233 | { | |
d67ae825 TH |
1234 | int err; |
1235 | ||
1236 | trace_nfs4_pnfs_read(hdr, task->tk_status); | |
dd52128a | 1237 | if (task->tk_status < 0) |
d67ae825 TH |
1238 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
1239 | hdr->args.offset, hdr->args.count, | |
dd52128a TM |
1240 | hdr->res.op_status, OP_READ, |
1241 | task->tk_status); | |
d67ae825 TH |
1242 | err = ff_layout_async_handle_error(task, hdr->args.context->state, |
1243 | hdr->ds_clp, hdr->lseg, | |
1244 | hdr->pgio_mirror_idx); | |
1245 | ||
1246 | switch (err) { | |
1247 | case -NFS4ERR_RESET_TO_PNFS: | |
13544412 TM |
1248 | if (ff_layout_choose_best_ds_for_read(hdr->lseg, |
1249 | hdr->pgio_mirror_idx + 1, | |
1250 | &hdr->pgio_mirror_idx)) | |
1251 | goto out_eagain; | |
54e4a0df | 1252 | ff_layout_read_record_layoutstats_done(task, hdr); |
d67ae825 TH |
1253 | pnfs_read_resend_pnfs(hdr); |
1254 | return task->tk_status; | |
1255 | case -NFS4ERR_RESET_TO_MDS: | |
d67ae825 TH |
1256 | ff_layout_reset_read(hdr); |
1257 | return task->tk_status; | |
1258 | case -EAGAIN: | |
13544412 | 1259 | goto out_eagain; |
d67ae825 TH |
1260 | } |
1261 | ||
1262 | return 0; | |
13544412 TM |
1263 | out_eagain: |
1264 | rpc_restart_call_prepare(task); | |
1265 | return -EAGAIN; | |
d67ae825 TH |
1266 | } |
1267 | ||
c0f5f505 TM |
1268 | static bool |
1269 | ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg) | |
1270 | { | |
1271 | return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT); | |
1272 | } | |
1273 | ||
d67ae825 TH |
1274 | /* |
1275 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
1276 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
1277 | * rfc5661 is not clear about which credential should be used. | |
1278 | * | |
1279 | * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so | |
1280 | * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 | |
1281 | * we always send layoutcommit after DS writes. | |
1282 | */ | |
1283 | static void | |
bc28e1c2 TM |
1284 | ff_layout_set_layoutcommit(struct inode *inode, |
1285 | struct pnfs_layout_segment *lseg, | |
1286 | loff_t end_offset) | |
d67ae825 | 1287 | { |
bc28e1c2 | 1288 | if (!ff_layout_need_layoutcommit(lseg)) |
c0f5f505 TM |
1289 | return; |
1290 | ||
bc28e1c2 TM |
1291 | pnfs_set_layoutcommit(inode, lseg, end_offset); |
1292 | dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino, | |
1293 | (unsigned long long) NFS_I(inode)->layout->plh_lwb); | |
d67ae825 TH |
1294 | } |
1295 | ||
1296 | static bool | |
75bf47eb | 1297 | ff_layout_device_unavailable(struct pnfs_layout_segment *lseg, int idx) |
d67ae825 TH |
1298 | { |
1299 | /* No mirroring for now */ | |
1300 | struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
1301 | ||
1302 | return ff_layout_test_devid_unavailable(node); | |
1303 | } | |
1304 | ||
37e9ed22 TM |
1305 | static void ff_layout_read_record_layoutstats_start(struct rpc_task *task, |
1306 | struct nfs_pgio_header *hdr) | |
d67ae825 | 1307 | { |
37e9ed22 TM |
1308 | if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) |
1309 | return; | |
0b7baf94 | 1310 | nfs4_ff_layout_stat_io_start_read(hdr->inode, |
abcb7bfc | 1311 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
e76d28dd TM |
1312 | hdr->args.count, |
1313 | task->tk_start); | |
37e9ed22 TM |
1314 | } |
1315 | ||
1316 | static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, | |
1317 | struct nfs_pgio_header *hdr) | |
1318 | { | |
1319 | if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) | |
1320 | return; | |
1321 | nfs4_ff_layout_stat_io_end_read(task, | |
1322 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), | |
1323 | hdr->args.count, | |
1324 | hdr->res.count); | |
1325 | } | |
abcb7bfc | 1326 | |
37e9ed22 TM |
1327 | static int ff_layout_read_prepare_common(struct rpc_task *task, |
1328 | struct nfs_pgio_header *hdr) | |
1329 | { | |
d67ae825 TH |
1330 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
1331 | rpc_exit(task, -EIO); | |
1332 | return -EIO; | |
1333 | } | |
75bf47eb TM |
1334 | if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) { |
1335 | rpc_exit(task, -EHOSTDOWN); | |
d67ae825 TH |
1336 | return -EAGAIN; |
1337 | } | |
d67ae825 | 1338 | |
37e9ed22 | 1339 | ff_layout_read_record_layoutstats_start(task, hdr); |
d67ae825 TH |
1340 | return 0; |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * Call ops for the async read/write cases | |
1345 | * In the case of dense layouts, the offset needs to be reset to its | |
1346 | * original value. | |
1347 | */ | |
1348 | static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) | |
1349 | { | |
1350 | struct nfs_pgio_header *hdr = data; | |
1351 | ||
1352 | if (ff_layout_read_prepare_common(task, hdr)) | |
1353 | return; | |
1354 | ||
1355 | rpc_call_start(task); | |
1356 | } | |
1357 | ||
d67ae825 TH |
1358 | static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) |
1359 | { | |
1360 | struct nfs_pgio_header *hdr = data; | |
1361 | ||
6de7e12f AS |
1362 | if (nfs4_setup_sequence(hdr->ds_clp, |
1363 | &hdr->args.seq_args, | |
1364 | &hdr->res.seq_res, | |
1365 | task)) | |
d67ae825 TH |
1366 | return; |
1367 | ||
abcb7bfc TM |
1368 | if (ff_layout_read_prepare_common(task, hdr)) |
1369 | return; | |
1370 | ||
d67ae825 TH |
1371 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
1372 | hdr->args.lock_context, FMODE_READ) == -EIO) | |
1373 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
1374 | } | |
1375 | ||
1376 | static void ff_layout_read_call_done(struct rpc_task *task, void *data) | |
1377 | { | |
1378 | struct nfs_pgio_header *hdr = data; | |
1379 | ||
1380 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
1381 | ||
1382 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && | |
1383 | task->tk_status == 0) { | |
1384 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
1385 | return; | |
1386 | } | |
1387 | ||
1388 | /* Note this may cause RPC to be resent */ | |
1389 | hdr->mds_ops->rpc_call_done(task, hdr); | |
1390 | } | |
1391 | ||
1392 | static void ff_layout_read_count_stats(struct rpc_task *task, void *data) | |
1393 | { | |
1394 | struct nfs_pgio_header *hdr = data; | |
1395 | ||
37e9ed22 | 1396 | ff_layout_read_record_layoutstats_done(task, hdr); |
d67ae825 TH |
1397 | rpc_count_iostats_metrics(task, |
1398 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); | |
1399 | } | |
1400 | ||
4d0ac221 TM |
1401 | static void ff_layout_read_release(void *data) |
1402 | { | |
1403 | struct nfs_pgio_header *hdr = data; | |
1404 | ||
1405 | ff_layout_read_record_layoutstats_done(&hdr->task, hdr); | |
1406 | pnfs_generic_rw_release(data); | |
1407 | } | |
1408 | ||
1409 | ||
d67ae825 TH |
1410 | static int ff_layout_write_done_cb(struct rpc_task *task, |
1411 | struct nfs_pgio_header *hdr) | |
1412 | { | |
2e18d4d8 | 1413 | loff_t end_offs = 0; |
d67ae825 TH |
1414 | int err; |
1415 | ||
1416 | trace_nfs4_pnfs_write(hdr, task->tk_status); | |
dd52128a | 1417 | if (task->tk_status < 0) |
d67ae825 TH |
1418 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
1419 | hdr->args.offset, hdr->args.count, | |
dd52128a TM |
1420 | hdr->res.op_status, OP_WRITE, |
1421 | task->tk_status); | |
d67ae825 TH |
1422 | err = ff_layout_async_handle_error(task, hdr->args.context->state, |
1423 | hdr->ds_clp, hdr->lseg, | |
1424 | hdr->pgio_mirror_idx); | |
1425 | ||
1426 | switch (err) { | |
1427 | case -NFS4ERR_RESET_TO_PNFS: | |
7cc8c5cd TM |
1428 | ff_layout_reset_write(hdr, true); |
1429 | return task->tk_status; | |
d67ae825 | 1430 | case -NFS4ERR_RESET_TO_MDS: |
7cc8c5cd | 1431 | ff_layout_reset_write(hdr, false); |
d67ae825 TH |
1432 | return task->tk_status; |
1433 | case -EAGAIN: | |
d67ae825 TH |
1434 | return -EAGAIN; |
1435 | } | |
1436 | ||
1437 | if (hdr->res.verf->committed == NFS_FILE_SYNC || | |
1438 | hdr->res.verf->committed == NFS_DATA_SYNC) | |
2e18d4d8 TM |
1439 | end_offs = hdr->mds_offset + (loff_t)hdr->res.count; |
1440 | ||
1441 | /* Note: if the write is unstable, don't set end_offs until commit */ | |
1442 | ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs); | |
d67ae825 | 1443 | |
54204010 PT |
1444 | /* zero out fattr since we don't care DS attr at all */ |
1445 | hdr->fattr.valid = 0; | |
69f230d9 PT |
1446 | if (task->tk_status >= 0) |
1447 | nfs_writeback_update_inode(hdr); | |
1448 | ||
d67ae825 TH |
1449 | return 0; |
1450 | } | |
1451 | ||
1452 | static int ff_layout_commit_done_cb(struct rpc_task *task, | |
1453 | struct nfs_commit_data *data) | |
1454 | { | |
d67ae825 TH |
1455 | int err; |
1456 | ||
1457 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); | |
dd52128a | 1458 | if (task->tk_status < 0) |
d67ae825 TH |
1459 | ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, |
1460 | data->args.offset, data->args.count, | |
dd52128a TM |
1461 | data->res.op_status, OP_COMMIT, |
1462 | task->tk_status); | |
d67ae825 TH |
1463 | err = ff_layout_async_handle_error(task, NULL, data->ds_clp, |
1464 | data->lseg, data->ds_commit_index); | |
1465 | ||
1466 | switch (err) { | |
1467 | case -NFS4ERR_RESET_TO_PNFS: | |
7cc8c5cd TM |
1468 | pnfs_generic_prepare_to_resend_writes(data); |
1469 | return -EAGAIN; | |
d67ae825 | 1470 | case -NFS4ERR_RESET_TO_MDS: |
d67ae825 TH |
1471 | pnfs_generic_prepare_to_resend_writes(data); |
1472 | return -EAGAIN; | |
1473 | case -EAGAIN: | |
1474 | rpc_restart_call_prepare(task); | |
1475 | return -EAGAIN; | |
1476 | } | |
1477 | ||
bc28e1c2 | 1478 | ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb); |
d67ae825 TH |
1479 | |
1480 | return 0; | |
1481 | } | |
1482 | ||
37e9ed22 TM |
1483 | static void ff_layout_write_record_layoutstats_start(struct rpc_task *task, |
1484 | struct nfs_pgio_header *hdr) | |
d67ae825 | 1485 | { |
37e9ed22 TM |
1486 | if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) |
1487 | return; | |
0b7baf94 | 1488 | nfs4_ff_layout_stat_io_start_write(hdr->inode, |
abcb7bfc | 1489 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
e76d28dd TM |
1490 | hdr->args.count, |
1491 | task->tk_start); | |
37e9ed22 TM |
1492 | } |
1493 | ||
1494 | static void ff_layout_write_record_layoutstats_done(struct rpc_task *task, | |
1495 | struct nfs_pgio_header *hdr) | |
1496 | { | |
1497 | if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) | |
1498 | return; | |
1499 | nfs4_ff_layout_stat_io_end_write(task, | |
1500 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), | |
1501 | hdr->args.count, hdr->res.count, | |
1502 | hdr->res.verf->committed); | |
1503 | } | |
abcb7bfc | 1504 | |
37e9ed22 TM |
1505 | static int ff_layout_write_prepare_common(struct rpc_task *task, |
1506 | struct nfs_pgio_header *hdr) | |
1507 | { | |
d67ae825 TH |
1508 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
1509 | rpc_exit(task, -EIO); | |
1510 | return -EIO; | |
1511 | } | |
1512 | ||
75bf47eb TM |
1513 | if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) { |
1514 | rpc_exit(task, -EHOSTDOWN); | |
d67ae825 TH |
1515 | return -EAGAIN; |
1516 | } | |
1517 | ||
37e9ed22 | 1518 | ff_layout_write_record_layoutstats_start(task, hdr); |
d67ae825 TH |
1519 | return 0; |
1520 | } | |
1521 | ||
1522 | static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) | |
1523 | { | |
1524 | struct nfs_pgio_header *hdr = data; | |
1525 | ||
1526 | if (ff_layout_write_prepare_common(task, hdr)) | |
1527 | return; | |
1528 | ||
1529 | rpc_call_start(task); | |
1530 | } | |
1531 | ||
1532 | static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) | |
1533 | { | |
1534 | struct nfs_pgio_header *hdr = data; | |
1535 | ||
6de7e12f AS |
1536 | if (nfs4_setup_sequence(hdr->ds_clp, |
1537 | &hdr->args.seq_args, | |
1538 | &hdr->res.seq_res, | |
1539 | task)) | |
d67ae825 TH |
1540 | return; |
1541 | ||
abcb7bfc TM |
1542 | if (ff_layout_write_prepare_common(task, hdr)) |
1543 | return; | |
1544 | ||
d67ae825 TH |
1545 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
1546 | hdr->args.lock_context, FMODE_WRITE) == -EIO) | |
1547 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
1548 | } | |
1549 | ||
1550 | static void ff_layout_write_call_done(struct rpc_task *task, void *data) | |
1551 | { | |
1552 | struct nfs_pgio_header *hdr = data; | |
1553 | ||
1554 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && | |
1555 | task->tk_status == 0) { | |
1556 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
1557 | return; | |
1558 | } | |
1559 | ||
1560 | /* Note this may cause RPC to be resent */ | |
1561 | hdr->mds_ops->rpc_call_done(task, hdr); | |
1562 | } | |
1563 | ||
1564 | static void ff_layout_write_count_stats(struct rpc_task *task, void *data) | |
1565 | { | |
1566 | struct nfs_pgio_header *hdr = data; | |
1567 | ||
37e9ed22 | 1568 | ff_layout_write_record_layoutstats_done(task, hdr); |
d67ae825 TH |
1569 | rpc_count_iostats_metrics(task, |
1570 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); | |
1571 | } | |
1572 | ||
4d0ac221 TM |
1573 | static void ff_layout_write_release(void *data) |
1574 | { | |
1575 | struct nfs_pgio_header *hdr = data; | |
1576 | ||
1577 | ff_layout_write_record_layoutstats_done(&hdr->task, hdr); | |
1578 | pnfs_generic_rw_release(data); | |
1579 | } | |
1580 | ||
37e9ed22 | 1581 | static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task, |
abcb7bfc TM |
1582 | struct nfs_commit_data *cdata) |
1583 | { | |
37e9ed22 TM |
1584 | if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags)) |
1585 | return; | |
0b7baf94 | 1586 | nfs4_ff_layout_stat_io_start_write(cdata->inode, |
abcb7bfc | 1587 | FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), |
e76d28dd | 1588 | 0, task->tk_start); |
abcb7bfc TM |
1589 | } |
1590 | ||
37e9ed22 TM |
1591 | static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task, |
1592 | struct nfs_commit_data *cdata) | |
1593 | { | |
1594 | struct nfs_page *req; | |
1595 | __u64 count = 0; | |
1596 | ||
1597 | if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags)) | |
1598 | return; | |
1599 | ||
1600 | if (task->tk_status == 0) { | |
1601 | list_for_each_entry(req, &cdata->pages, wb_list) | |
1602 | count += req->wb_bytes; | |
1603 | } | |
1604 | nfs4_ff_layout_stat_io_end_write(task, | |
1605 | FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), | |
1606 | count, count, NFS_FILE_SYNC); | |
1607 | } | |
1608 | ||
1609 | static void ff_layout_commit_prepare_common(struct rpc_task *task, | |
1610 | struct nfs_commit_data *cdata) | |
1611 | { | |
1612 | ff_layout_commit_record_layoutstats_start(task, cdata); | |
1613 | } | |
1614 | ||
d67ae825 TH |
1615 | static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) |
1616 | { | |
abcb7bfc | 1617 | ff_layout_commit_prepare_common(task, data); |
d67ae825 TH |
1618 | rpc_call_start(task); |
1619 | } | |
1620 | ||
1621 | static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) | |
1622 | { | |
1623 | struct nfs_commit_data *wdata = data; | |
1624 | ||
6de7e12f AS |
1625 | if (nfs4_setup_sequence(wdata->ds_clp, |
1626 | &wdata->args.seq_args, | |
1627 | &wdata->res.seq_res, | |
1628 | task)) | |
abcb7bfc TM |
1629 | return; |
1630 | ff_layout_commit_prepare_common(task, data); | |
1631 | } | |
1632 | ||
1633 | static void ff_layout_commit_done(struct rpc_task *task, void *data) | |
141b9b59 PT |
1634 | { |
1635 | pnfs_generic_write_commit_done(task, data); | |
1636 | } | |
1637 | ||
1638 | static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) | |
abcb7bfc TM |
1639 | { |
1640 | struct nfs_commit_data *cdata = data; | |
abcb7bfc | 1641 | |
37e9ed22 | 1642 | ff_layout_commit_record_layoutstats_done(task, cdata); |
d67ae825 TH |
1643 | rpc_count_iostats_metrics(task, |
1644 | &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); | |
1645 | } | |
1646 | ||
4d0ac221 TM |
1647 | static void ff_layout_commit_release(void *data) |
1648 | { | |
1649 | struct nfs_commit_data *cdata = data; | |
1650 | ||
1651 | ff_layout_commit_record_layoutstats_done(&cdata->task, cdata); | |
1652 | pnfs_generic_commit_release(data); | |
1653 | } | |
1654 | ||
d67ae825 TH |
1655 | static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { |
1656 | .rpc_call_prepare = ff_layout_read_prepare_v3, | |
1657 | .rpc_call_done = ff_layout_read_call_done, | |
1658 | .rpc_count_stats = ff_layout_read_count_stats, | |
4d0ac221 | 1659 | .rpc_release = ff_layout_read_release, |
d67ae825 TH |
1660 | }; |
1661 | ||
1662 | static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { | |
1663 | .rpc_call_prepare = ff_layout_read_prepare_v4, | |
1664 | .rpc_call_done = ff_layout_read_call_done, | |
1665 | .rpc_count_stats = ff_layout_read_count_stats, | |
4d0ac221 | 1666 | .rpc_release = ff_layout_read_release, |
d67ae825 TH |
1667 | }; |
1668 | ||
1669 | static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { | |
1670 | .rpc_call_prepare = ff_layout_write_prepare_v3, | |
1671 | .rpc_call_done = ff_layout_write_call_done, | |
1672 | .rpc_count_stats = ff_layout_write_count_stats, | |
4d0ac221 | 1673 | .rpc_release = ff_layout_write_release, |
d67ae825 TH |
1674 | }; |
1675 | ||
1676 | static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { | |
1677 | .rpc_call_prepare = ff_layout_write_prepare_v4, | |
1678 | .rpc_call_done = ff_layout_write_call_done, | |
1679 | .rpc_count_stats = ff_layout_write_count_stats, | |
4d0ac221 | 1680 | .rpc_release = ff_layout_write_release, |
d67ae825 TH |
1681 | }; |
1682 | ||
1683 | static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { | |
1684 | .rpc_call_prepare = ff_layout_commit_prepare_v3, | |
abcb7bfc | 1685 | .rpc_call_done = ff_layout_commit_done, |
d67ae825 | 1686 | .rpc_count_stats = ff_layout_commit_count_stats, |
4d0ac221 | 1687 | .rpc_release = ff_layout_commit_release, |
d67ae825 TH |
1688 | }; |
1689 | ||
1690 | static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { | |
1691 | .rpc_call_prepare = ff_layout_commit_prepare_v4, | |
abcb7bfc | 1692 | .rpc_call_done = ff_layout_commit_done, |
d67ae825 | 1693 | .rpc_count_stats = ff_layout_commit_count_stats, |
4d0ac221 | 1694 | .rpc_release = ff_layout_commit_release, |
d67ae825 TH |
1695 | }; |
1696 | ||
1697 | static enum pnfs_try_status | |
1698 | ff_layout_read_pagelist(struct nfs_pgio_header *hdr) | |
1699 | { | |
1700 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1701 | struct nfs4_pnfs_ds *ds; | |
1702 | struct rpc_clnt *ds_clnt; | |
1703 | struct rpc_cred *ds_cred; | |
1704 | loff_t offset = hdr->args.offset; | |
1705 | u32 idx = hdr->pgio_mirror_idx; | |
1706 | int vers; | |
1707 | struct nfs_fh *fh; | |
1708 | ||
5b5e0928 | 1709 | dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n", |
d67ae825 TH |
1710 | __func__, hdr->inode->i_ino, |
1711 | hdr->args.pgbase, (size_t)hdr->args.count, offset); | |
1712 | ||
1713 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, false); | |
1714 | if (!ds) | |
1715 | goto out_failed; | |
1716 | ||
1717 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1718 | hdr->inode); | |
1719 | if (IS_ERR(ds_clnt)) | |
1720 | goto out_failed; | |
1721 | ||
1722 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
57f3f4c0 | 1723 | if (!ds_cred) |
d67ae825 TH |
1724 | goto out_failed; |
1725 | ||
1726 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1727 | ||
1728 | dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, | |
212bf41d | 1729 | ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers); |
d67ae825 | 1730 | |
75bf47eb | 1731 | hdr->pgio_done_cb = ff_layout_read_done_cb; |
212bf41d | 1732 | refcount_inc(&ds->ds_clp->cl_count); |
d67ae825 TH |
1733 | hdr->ds_clp = ds->ds_clp; |
1734 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1735 | if (fh) | |
1736 | hdr->args.fh = fh; | |
d67ae825 TH |
1737 | /* |
1738 | * Note that if we ever decide to split across DSes, | |
1739 | * then we may need to handle dense-like offsets. | |
1740 | */ | |
1741 | hdr->args.offset = offset; | |
1742 | hdr->mds_offset = offset; | |
1743 | ||
1744 | /* Perform an asynchronous read to ds */ | |
1745 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1746 | vers == 3 ? &ff_layout_read_call_ops_v3 : | |
1747 | &ff_layout_read_call_ops_v4, | |
1748 | 0, RPC_TASK_SOFTCONN); | |
57f3f4c0 | 1749 | put_rpccred(ds_cred); |
d67ae825 TH |
1750 | return PNFS_ATTEMPTED; |
1751 | ||
1752 | out_failed: | |
3b13b4b3 | 1753 | if (ff_layout_avoid_mds_available_ds(lseg)) |
d67ae825 TH |
1754 | return PNFS_TRY_AGAIN; |
1755 | return PNFS_NOT_ATTEMPTED; | |
1756 | } | |
1757 | ||
1758 | /* Perform async writes. */ | |
1759 | static enum pnfs_try_status | |
1760 | ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) | |
1761 | { | |
1762 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1763 | struct nfs4_pnfs_ds *ds; | |
1764 | struct rpc_clnt *ds_clnt; | |
1765 | struct rpc_cred *ds_cred; | |
1766 | loff_t offset = hdr->args.offset; | |
1767 | int vers; | |
1768 | struct nfs_fh *fh; | |
1769 | int idx = hdr->pgio_mirror_idx; | |
1770 | ||
1771 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1772 | if (!ds) | |
37f8aa16 | 1773 | goto out_failed; |
d67ae825 TH |
1774 | |
1775 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1776 | hdr->inode); | |
1777 | if (IS_ERR(ds_clnt)) | |
37f8aa16 | 1778 | goto out_failed; |
d67ae825 TH |
1779 | |
1780 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
57f3f4c0 | 1781 | if (!ds_cred) |
37f8aa16 | 1782 | goto out_failed; |
d67ae825 TH |
1783 | |
1784 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1785 | ||
5b5e0928 | 1786 | dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n", |
d67ae825 | 1787 | __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, |
212bf41d | 1788 | offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), |
d67ae825 TH |
1789 | vers); |
1790 | ||
1791 | hdr->pgio_done_cb = ff_layout_write_done_cb; | |
212bf41d | 1792 | refcount_inc(&ds->ds_clp->cl_count); |
d67ae825 TH |
1793 | hdr->ds_clp = ds->ds_clp; |
1794 | hdr->ds_commit_idx = idx; | |
1795 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1796 | if (fh) | |
1797 | hdr->args.fh = fh; | |
1798 | ||
1799 | /* | |
1800 | * Note that if we ever decide to split across DSes, | |
1801 | * then we may need to handle dense-like offsets. | |
1802 | */ | |
1803 | hdr->args.offset = offset; | |
1804 | ||
1805 | /* Perform an asynchronous write */ | |
1806 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1807 | vers == 3 ? &ff_layout_write_call_ops_v3 : | |
1808 | &ff_layout_write_call_ops_v4, | |
1809 | sync, RPC_TASK_SOFTCONN); | |
57f3f4c0 | 1810 | put_rpccred(ds_cred); |
d67ae825 | 1811 | return PNFS_ATTEMPTED; |
37f8aa16 TM |
1812 | |
1813 | out_failed: | |
1814 | if (ff_layout_avoid_mds_available_ds(lseg)) | |
1815 | return PNFS_TRY_AGAIN; | |
1816 | return PNFS_NOT_ATTEMPTED; | |
d67ae825 TH |
1817 | } |
1818 | ||
d67ae825 TH |
1819 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
1820 | { | |
1821 | return i; | |
1822 | } | |
1823 | ||
1824 | static struct nfs_fh * | |
1825 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
1826 | { | |
1827 | struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); | |
1828 | ||
1829 | /* FIXME: Assume that there is only one NFS version available | |
1830 | * for the DS. | |
1831 | */ | |
1832 | return &flseg->mirror_array[i]->fh_versions[0]; | |
1833 | } | |
1834 | ||
1835 | static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) | |
1836 | { | |
1837 | struct pnfs_layout_segment *lseg = data->lseg; | |
1838 | struct nfs4_pnfs_ds *ds; | |
1839 | struct rpc_clnt *ds_clnt; | |
1840 | struct rpc_cred *ds_cred; | |
1841 | u32 idx; | |
57f3f4c0 | 1842 | int vers, ret; |
d67ae825 TH |
1843 | struct nfs_fh *fh; |
1844 | ||
4b75053e TM |
1845 | if (!lseg || !(pnfs_is_valid_lseg(lseg) || |
1846 | test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))) | |
1847 | goto out_err; | |
1848 | ||
d67ae825 TH |
1849 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); |
1850 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1851 | if (!ds) | |
1852 | goto out_err; | |
1853 | ||
1854 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1855 | data->inode); | |
1856 | if (IS_ERR(ds_clnt)) | |
1857 | goto out_err; | |
1858 | ||
1859 | ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred); | |
57f3f4c0 | 1860 | if (!ds_cred) |
d67ae825 TH |
1861 | goto out_err; |
1862 | ||
1863 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1864 | ||
1865 | dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__, | |
212bf41d | 1866 | data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count), |
d67ae825 TH |
1867 | vers); |
1868 | data->commit_done_cb = ff_layout_commit_done_cb; | |
1869 | data->cred = ds_cred; | |
212bf41d | 1870 | refcount_inc(&ds->ds_clp->cl_count); |
d67ae825 TH |
1871 | data->ds_clp = ds->ds_clp; |
1872 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1873 | if (fh) | |
1874 | data->args.fh = fh; | |
abcb7bfc | 1875 | |
57f3f4c0 | 1876 | ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, |
d67ae825 TH |
1877 | vers == 3 ? &ff_layout_commit_call_ops_v3 : |
1878 | &ff_layout_commit_call_ops_v4, | |
1879 | how, RPC_TASK_SOFTCONN); | |
57f3f4c0 JL |
1880 | put_rpccred(ds_cred); |
1881 | return ret; | |
d67ae825 TH |
1882 | out_err: |
1883 | pnfs_generic_prepare_to_resend_writes(data); | |
1884 | pnfs_generic_commit_release(data); | |
1885 | return -EAGAIN; | |
1886 | } | |
1887 | ||
1888 | static int | |
1889 | ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
1890 | int how, struct nfs_commit_info *cinfo) | |
1891 | { | |
1892 | return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, | |
1893 | ff_layout_initiate_commit); | |
1894 | } | |
1895 | ||
1896 | static struct pnfs_ds_commit_info * | |
1897 | ff_layout_get_ds_info(struct inode *inode) | |
1898 | { | |
1899 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; | |
1900 | ||
1901 | if (layout == NULL) | |
1902 | return NULL; | |
1903 | ||
1904 | return &FF_LAYOUT_FROM_HDR(layout)->commit_info; | |
1905 | } | |
1906 | ||
1907 | static void | |
fc87701b | 1908 | ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) |
d67ae825 TH |
1909 | { |
1910 | nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, | |
1911 | id_node)); | |
1912 | } | |
1913 | ||
5ba6a09e | 1914 | static int ff_layout_encode_ioerr(struct xdr_stream *xdr, |
5b9b3c85 TM |
1915 | const struct nfs4_layoutreturn_args *args, |
1916 | const struct nfs4_flexfile_layoutreturn_args *ff_args) | |
d67ae825 | 1917 | { |
d67ae825 | 1918 | __be32 *start; |
d67ae825 TH |
1919 | |
1920 | start = xdr_reserve_space(xdr, 4); | |
1921 | if (unlikely(!start)) | |
1922 | return -E2BIG; | |
1923 | ||
5b9b3c85 | 1924 | *start = cpu_to_be32(ff_args->num_errors); |
d67ae825 | 1925 | /* This assume we always return _ALL_ layouts */ |
5b9b3c85 | 1926 | return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors); |
d67ae825 TH |
1927 | } |
1928 | ||
230bc962 TM |
1929 | static void |
1930 | encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len) | |
1931 | { | |
ab6e9aaf | 1932 | WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0); |
230bc962 TM |
1933 | } |
1934 | ||
1935 | static void | |
1936 | ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr, | |
1937 | const nfs4_stateid *stateid, | |
1938 | const struct nfs42_layoutstat_devinfo *devinfo) | |
1939 | { | |
1940 | __be32 *p; | |
1941 | ||
1942 | p = xdr_reserve_space(xdr, 8 + 8); | |
1943 | p = xdr_encode_hyper(p, devinfo->offset); | |
1944 | p = xdr_encode_hyper(p, devinfo->length); | |
1945 | encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE); | |
1946 | p = xdr_reserve_space(xdr, 4*8); | |
1947 | p = xdr_encode_hyper(p, devinfo->read_count); | |
1948 | p = xdr_encode_hyper(p, devinfo->read_bytes); | |
1949 | p = xdr_encode_hyper(p, devinfo->write_count); | |
1950 | p = xdr_encode_hyper(p, devinfo->write_bytes); | |
1951 | encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE); | |
1952 | } | |
1953 | ||
1954 | static void | |
1955 | ff_layout_encode_ff_iostat(struct xdr_stream *xdr, | |
1956 | const nfs4_stateid *stateid, | |
1957 | const struct nfs42_layoutstat_devinfo *devinfo) | |
1958 | { | |
1959 | ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo); | |
1960 | ff_layout_encode_ff_layoutupdate(xdr, devinfo, | |
1961 | devinfo->ld_private.data); | |
1962 | } | |
1963 | ||
d67ae825 | 1964 | /* report nothing for now */ |
230bc962 TM |
1965 | static void ff_layout_encode_iostats_array(struct xdr_stream *xdr, |
1966 | const struct nfs4_layoutreturn_args *args, | |
1967 | struct nfs4_flexfile_layoutreturn_args *ff_args) | |
d67ae825 TH |
1968 | { |
1969 | __be32 *p; | |
230bc962 | 1970 | int i; |
d67ae825 TH |
1971 | |
1972 | p = xdr_reserve_space(xdr, 4); | |
230bc962 TM |
1973 | *p = cpu_to_be32(ff_args->num_dev); |
1974 | for (i = 0; i < ff_args->num_dev; i++) | |
1975 | ff_layout_encode_ff_iostat(xdr, | |
1976 | &args->layout->plh_stateid, | |
1977 | &ff_args->devinfo[i]); | |
1978 | } | |
1979 | ||
1980 | static void | |
1981 | ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo, | |
1982 | unsigned int num_entries) | |
1983 | { | |
1984 | unsigned int i; | |
1985 | ||
1986 | for (i = 0; i < num_entries; i++) { | |
1987 | if (!devinfo[i].ld_private.ops) | |
1988 | continue; | |
1989 | if (!devinfo[i].ld_private.ops->free) | |
1990 | continue; | |
1991 | devinfo[i].ld_private.ops->free(&devinfo[i].ld_private); | |
1992 | } | |
d67ae825 TH |
1993 | } |
1994 | ||
1995 | static struct nfs4_deviceid_node * | |
1996 | ff_layout_alloc_deviceid_node(struct nfs_server *server, | |
1997 | struct pnfs_device *pdev, gfp_t gfp_flags) | |
1998 | { | |
1999 | struct nfs4_ff_layout_ds *dsaddr; | |
2000 | ||
2001 | dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); | |
2002 | if (!dsaddr) | |
2003 | return NULL; | |
2004 | return &dsaddr->id_node; | |
2005 | } | |
2006 | ||
2007 | static void | |
94e5c571 | 2008 | ff_layout_encode_layoutreturn(struct xdr_stream *xdr, |
5b9b3c85 TM |
2009 | const void *voidargs, |
2010 | const struct nfs4_xdr_opaque_data *ff_opaque) | |
d67ae825 | 2011 | { |
5b9b3c85 | 2012 | const struct nfs4_layoutreturn_args *args = voidargs; |
5ba6a09e | 2013 | struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data; |
d9152114 TM |
2014 | struct xdr_buf tmp_buf = { |
2015 | .head = { | |
2016 | [0] = { | |
2017 | .iov_base = page_address(ff_args->pages[0]), | |
2018 | }, | |
2019 | }, | |
2020 | .buflen = PAGE_SIZE, | |
2021 | }; | |
2022 | struct xdr_stream tmp_xdr; | |
d67ae825 TH |
2023 | __be32 *start; |
2024 | ||
2025 | dprintk("%s: Begin\n", __func__); | |
d67ae825 | 2026 | |
d9152114 TM |
2027 | xdr_init_encode(&tmp_xdr, &tmp_buf, NULL); |
2028 | ||
2029 | ff_layout_encode_ioerr(&tmp_xdr, args, ff_args); | |
2030 | ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args); | |
2031 | ||
2032 | start = xdr_reserve_space(xdr, 4); | |
2033 | *start = cpu_to_be32(tmp_buf.len); | |
2034 | xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len); | |
082fa37d | 2035 | |
d67ae825 TH |
2036 | dprintk("%s: Return\n", __func__); |
2037 | } | |
2038 | ||
5b9b3c85 TM |
2039 | static void |
2040 | ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args) | |
2041 | { | |
2042 | struct nfs4_flexfile_layoutreturn_args *ff_args; | |
2043 | ||
2044 | if (!args->data) | |
2045 | return; | |
2046 | ff_args = args->data; | |
2047 | args->data = NULL; | |
2048 | ||
2049 | ff_layout_free_ds_ioerr(&ff_args->errors); | |
230bc962 | 2050 | ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev); |
5b9b3c85 | 2051 | |
d9152114 | 2052 | put_page(ff_args->pages[0]); |
5b9b3c85 TM |
2053 | kfree(ff_args); |
2054 | } | |
2055 | ||
2e54b9b1 | 2056 | static const struct nfs4_xdr_opaque_ops layoutreturn_ops = { |
5b9b3c85 TM |
2057 | .encode = ff_layout_encode_layoutreturn, |
2058 | .free = ff_layout_free_layoutreturn, | |
2059 | }; | |
2060 | ||
2061 | static int | |
2062 | ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args) | |
2063 | { | |
2064 | struct nfs4_flexfile_layoutreturn_args *ff_args; | |
230bc962 | 2065 | struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout); |
5b9b3c85 TM |
2066 | |
2067 | ff_args = kmalloc(sizeof(*ff_args), GFP_KERNEL); | |
2068 | if (!ff_args) | |
d9152114 TM |
2069 | goto out_nomem; |
2070 | ff_args->pages[0] = alloc_page(GFP_KERNEL); | |
2071 | if (!ff_args->pages[0]) | |
2072 | goto out_nomem_free; | |
5b9b3c85 TM |
2073 | |
2074 | INIT_LIST_HEAD(&ff_args->errors); | |
2075 | ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout, | |
2076 | &args->range, &ff_args->errors, | |
2077 | FF_LAYOUTRETURN_MAXERR); | |
2078 | ||
230bc962 TM |
2079 | spin_lock(&args->inode->i_lock); |
2080 | ff_args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr, | |
2081 | &ff_args->devinfo[0], ARRAY_SIZE(ff_args->devinfo)); | |
2082 | spin_unlock(&args->inode->i_lock); | |
2083 | ||
5b9b3c85 TM |
2084 | args->ld_private->ops = &layoutreturn_ops; |
2085 | args->ld_private->data = ff_args; | |
2086 | return 0; | |
d9152114 TM |
2087 | out_nomem_free: |
2088 | kfree(ff_args); | |
2089 | out_nomem: | |
2090 | return -ENOMEM; | |
5b9b3c85 TM |
2091 | } |
2092 | ||
27c43064 PT |
2093 | static int |
2094 | ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen) | |
2095 | { | |
2096 | const struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
2097 | ||
2098 | return snprintf(buf, buflen, "%pI4", &sin->sin_addr); | |
2099 | } | |
2100 | ||
2101 | static size_t | |
2102 | ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf, | |
2103 | const int buflen) | |
2104 | { | |
2105 | const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
2106 | const struct in6_addr *addr = &sin6->sin6_addr; | |
2107 | ||
2108 | /* | |
2109 | * RFC 4291, Section 2.2.2 | |
2110 | * | |
2111 | * Shorthanded ANY address | |
2112 | */ | |
2113 | if (ipv6_addr_any(addr)) | |
2114 | return snprintf(buf, buflen, "::"); | |
2115 | ||
2116 | /* | |
2117 | * RFC 4291, Section 2.2.2 | |
2118 | * | |
2119 | * Shorthanded loopback address | |
2120 | */ | |
2121 | if (ipv6_addr_loopback(addr)) | |
2122 | return snprintf(buf, buflen, "::1"); | |
2123 | ||
2124 | /* | |
2125 | * RFC 4291, Section 2.2.3 | |
2126 | * | |
2127 | * Special presentation address format for mapped v4 | |
2128 | * addresses. | |
2129 | */ | |
2130 | if (ipv6_addr_v4mapped(addr)) | |
2131 | return snprintf(buf, buflen, "::ffff:%pI4", | |
2132 | &addr->s6_addr32[3]); | |
2133 | ||
2134 | /* | |
2135 | * RFC 4291, Section 2.2.1 | |
2136 | */ | |
2137 | return snprintf(buf, buflen, "%pI6c", addr); | |
2138 | } | |
2139 | ||
2140 | /* Derived from rpc_sockaddr2uaddr */ | |
2141 | static void | |
2142 | ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da) | |
2143 | { | |
2144 | struct sockaddr *sap = (struct sockaddr *)&da->da_addr; | |
2145 | char portbuf[RPCBIND_MAXUADDRPLEN]; | |
2146 | char addrbuf[RPCBIND_MAXUADDRLEN]; | |
2147 | char *netid; | |
2148 | unsigned short port; | |
2149 | int len, netid_len; | |
2150 | __be32 *p; | |
2151 | ||
2152 | switch (sap->sa_family) { | |
2153 | case AF_INET: | |
2154 | if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0) | |
2155 | return; | |
2156 | port = ntohs(((struct sockaddr_in *)sap)->sin_port); | |
2157 | netid = "tcp"; | |
2158 | netid_len = 3; | |
2159 | break; | |
2160 | case AF_INET6: | |
2161 | if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) | |
2162 | return; | |
2163 | port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); | |
2164 | netid = "tcp6"; | |
2165 | netid_len = 4; | |
2166 | break; | |
2167 | default: | |
2168 | /* we only support tcp and tcp6 */ | |
2169 | WARN_ON_ONCE(1); | |
2170 | return; | |
2171 | } | |
2172 | ||
2173 | snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); | |
2174 | len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); | |
2175 | ||
2176 | p = xdr_reserve_space(xdr, 4 + netid_len); | |
2177 | xdr_encode_opaque(p, netid, netid_len); | |
2178 | ||
2179 | p = xdr_reserve_space(xdr, 4 + len); | |
2180 | xdr_encode_opaque(p, addrbuf, len); | |
2181 | } | |
2182 | ||
2183 | static void | |
2184 | ff_layout_encode_nfstime(struct xdr_stream *xdr, | |
2185 | ktime_t t) | |
2186 | { | |
2187 | struct timespec64 ts; | |
2188 | __be32 *p; | |
2189 | ||
2190 | p = xdr_reserve_space(xdr, 12); | |
2191 | ts = ktime_to_timespec64(t); | |
2192 | p = xdr_encode_hyper(p, ts.tv_sec); | |
2193 | *p++ = cpu_to_be32(ts.tv_nsec); | |
2194 | } | |
2195 | ||
2196 | static void | |
2197 | ff_layout_encode_io_latency(struct xdr_stream *xdr, | |
2198 | struct nfs4_ff_io_stat *stat) | |
2199 | { | |
2200 | __be32 *p; | |
2201 | ||
2202 | p = xdr_reserve_space(xdr, 5 * 8); | |
2203 | p = xdr_encode_hyper(p, stat->ops_requested); | |
2204 | p = xdr_encode_hyper(p, stat->bytes_requested); | |
2205 | p = xdr_encode_hyper(p, stat->ops_completed); | |
2206 | p = xdr_encode_hyper(p, stat->bytes_completed); | |
2207 | p = xdr_encode_hyper(p, stat->bytes_not_delivered); | |
2208 | ff_layout_encode_nfstime(xdr, stat->total_busy_time); | |
2209 | ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time); | |
2210 | } | |
2211 | ||
2212 | static void | |
422c93c8 TM |
2213 | ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr, |
2214 | const struct nfs42_layoutstat_devinfo *devinfo, | |
2215 | struct nfs4_ff_layout_mirror *mirror) | |
27c43064 | 2216 | { |
27c43064 PT |
2217 | struct nfs4_pnfs_ds_addr *da; |
2218 | struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds; | |
2219 | struct nfs_fh *fh = &mirror->fh_versions[0]; | |
422c93c8 | 2220 | __be32 *p; |
27c43064 PT |
2221 | |
2222 | da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node); | |
2223 | dprintk("%s: DS %s: encoding address %s\n", | |
2224 | __func__, ds->ds_remotestr, da->da_remotestr); | |
27c43064 PT |
2225 | /* netaddr4 */ |
2226 | ff_layout_encode_netaddr(xdr, da); | |
2227 | /* nfs_fh4 */ | |
2228 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
2229 | xdr_encode_opaque(p, fh->data, fh->size); | |
2230 | /* ff_io_latency4 read */ | |
2231 | spin_lock(&mirror->lock); | |
2232 | ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat); | |
2233 | /* ff_io_latency4 write */ | |
2234 | ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat); | |
2235 | spin_unlock(&mirror->lock); | |
2236 | /* nfstime4 */ | |
2237 | ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time)); | |
2238 | /* bool */ | |
2239 | p = xdr_reserve_space(xdr, 4); | |
2240 | *p = cpu_to_be32(false); | |
422c93c8 TM |
2241 | } |
2242 | ||
2243 | static void | |
2244 | ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args, | |
2245 | const struct nfs4_xdr_opaque_data *opaque) | |
2246 | { | |
2247 | struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque, | |
2248 | struct nfs42_layoutstat_devinfo, ld_private); | |
2249 | __be32 *start; | |
2250 | ||
2251 | /* layoutupdate length */ | |
2252 | start = xdr_reserve_space(xdr, 4); | |
2253 | ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data); | |
27c43064 PT |
2254 | |
2255 | *start = cpu_to_be32((xdr->p - start - 1) * 4); | |
2256 | } | |
2257 | ||
422c93c8 TM |
2258 | static void |
2259 | ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque) | |
2260 | { | |
2261 | struct nfs4_ff_layout_mirror *mirror = opaque->data; | |
2262 | ||
2263 | ff_layout_put_mirror(mirror); | |
2264 | } | |
2265 | ||
2266 | static const struct nfs4_xdr_opaque_ops layoutstat_ops = { | |
2267 | .encode = ff_layout_encode_layoutstats, | |
2268 | .free = ff_layout_free_layoutstats, | |
2269 | }; | |
2270 | ||
266d12d4 | 2271 | static int |
08e2e5bc TM |
2272 | ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo, |
2273 | struct nfs42_layoutstat_devinfo *devinfo, | |
266d12d4 | 2274 | int dev_limit) |
ad4dc53e | 2275 | { |
266d12d4 | 2276 | struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); |
ad4dc53e PT |
2277 | struct nfs4_ff_layout_mirror *mirror; |
2278 | struct nfs4_deviceid_node *dev; | |
266d12d4 | 2279 | int i = 0; |
ad4dc53e | 2280 | |
266d12d4 TM |
2281 | list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { |
2282 | if (i >= dev_limit) | |
ad4dc53e | 2283 | break; |
65990d1a | 2284 | if (IS_ERR_OR_NULL(mirror->mirror_ds)) |
27c43064 | 2285 | continue; |
06946c6a TM |
2286 | if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags)) |
2287 | continue; | |
266d12d4 | 2288 | /* mirror refcount put in cleanup_layoutstats */ |
81a090b9 | 2289 | if (!refcount_inc_not_zero(&mirror->ref)) |
266d12d4 TM |
2290 | continue; |
2291 | dev = &mirror->mirror_ds->id_node; | |
ad4dc53e | 2292 | memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE); |
266d12d4 TM |
2293 | devinfo->offset = 0; |
2294 | devinfo->length = NFS4_MAX_UINT64; | |
2f8220c1 | 2295 | spin_lock(&mirror->lock); |
d099d7b8 | 2296 | devinfo->read_count = mirror->read_stat.io_stat.ops_completed; |
ad4dc53e | 2297 | devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed; |
d099d7b8 | 2298 | devinfo->write_count = mirror->write_stat.io_stat.ops_completed; |
ad4dc53e | 2299 | devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed; |
2f8220c1 | 2300 | spin_unlock(&mirror->lock); |
ad4dc53e | 2301 | devinfo->layout_type = LAYOUT_FLEX_FILES; |
422c93c8 TM |
2302 | devinfo->ld_private.ops = &layoutstat_ops; |
2303 | devinfo->ld_private.data = mirror; | |
ad4dc53e | 2304 | |
08e2e5bc | 2305 | devinfo++; |
266d12d4 | 2306 | i++; |
ad4dc53e | 2307 | } |
266d12d4 | 2308 | return i; |
ad4dc53e PT |
2309 | } |
2310 | ||
2311 | static int | |
2312 | ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args) | |
2313 | { | |
266d12d4 | 2314 | struct nfs4_flexfile_layout *ff_layout; |
08e2e5bc | 2315 | const int dev_count = PNFS_LAYOUTSTATS_MAXDEV; |
ad4dc53e | 2316 | |
ad4dc53e | 2317 | /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */ |
266d12d4 | 2318 | args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO); |
ad4dc53e PT |
2319 | if (!args->devinfo) |
2320 | return -ENOMEM; | |
2321 | ||
ad4dc53e | 2322 | spin_lock(&args->inode->i_lock); |
08e2e5bc TM |
2323 | ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout); |
2324 | args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr, | |
2325 | &args->devinfo[0], dev_count); | |
ad4dc53e | 2326 | spin_unlock(&args->inode->i_lock); |
46c98c6d TM |
2327 | if (!args->num_dev) { |
2328 | kfree(args->devinfo); | |
2329 | args->devinfo = NULL; | |
2330 | return -ENOENT; | |
2331 | } | |
ad4dc53e PT |
2332 | |
2333 | return 0; | |
2334 | } | |
2335 | ||
76b2a303 TM |
2336 | static int |
2337 | ff_layout_set_layoutdriver(struct nfs_server *server, | |
2338 | const struct nfs_fh *dummy) | |
2339 | { | |
2340 | #if IS_ENABLED(CONFIG_NFS_V4_2) | |
2341 | server->caps |= NFS_CAP_LAYOUTSTATS; | |
2342 | #endif | |
2343 | return 0; | |
2344 | } | |
2345 | ||
d67ae825 TH |
2346 | static struct pnfs_layoutdriver_type flexfilelayout_type = { |
2347 | .id = LAYOUT_FLEX_FILES, | |
2348 | .name = "LAYOUT_FLEX_FILES", | |
2349 | .owner = THIS_MODULE, | |
76b2a303 | 2350 | .set_layoutdriver = ff_layout_set_layoutdriver, |
d67ae825 TH |
2351 | .alloc_layout_hdr = ff_layout_alloc_layout_hdr, |
2352 | .free_layout_hdr = ff_layout_free_layout_hdr, | |
2353 | .alloc_lseg = ff_layout_alloc_lseg, | |
2354 | .free_lseg = ff_layout_free_lseg, | |
0762ed2c | 2355 | .add_lseg = ff_layout_add_lseg, |
d67ae825 TH |
2356 | .pg_read_ops = &ff_layout_pg_read_ops, |
2357 | .pg_write_ops = &ff_layout_pg_write_ops, | |
2358 | .get_ds_info = ff_layout_get_ds_info, | |
fc87701b | 2359 | .free_deviceid_node = ff_layout_free_deviceid_node, |
338d00cf | 2360 | .mark_request_commit = pnfs_layout_mark_request_commit, |
d67ae825 TH |
2361 | .clear_request_commit = pnfs_generic_clear_request_commit, |
2362 | .scan_commit_lists = pnfs_generic_scan_commit_lists, | |
2363 | .recover_commit_reqs = pnfs_generic_recover_commit_reqs, | |
2364 | .commit_pagelist = ff_layout_commit_pagelist, | |
2365 | .read_pagelist = ff_layout_read_pagelist, | |
2366 | .write_pagelist = ff_layout_write_pagelist, | |
2367 | .alloc_deviceid_node = ff_layout_alloc_deviceid_node, | |
5b9b3c85 | 2368 | .prepare_layoutreturn = ff_layout_prepare_layoutreturn, |
5bb89b47 | 2369 | .sync = pnfs_nfs_generic_sync, |
ad4dc53e | 2370 | .prepare_layoutstats = ff_layout_prepare_layoutstats, |
d67ae825 TH |
2371 | }; |
2372 | ||
2373 | static int __init nfs4flexfilelayout_init(void) | |
2374 | { | |
2375 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", | |
2376 | __func__); | |
90a0be00 JL |
2377 | if (!ff_zero_group) { |
2378 | ff_zero_group = groups_alloc(0); | |
2379 | if (!ff_zero_group) | |
2380 | return -ENOMEM; | |
2381 | } | |
d67ae825 TH |
2382 | return pnfs_register_layoutdriver(&flexfilelayout_type); |
2383 | } | |
2384 | ||
2385 | static void __exit nfs4flexfilelayout_exit(void) | |
2386 | { | |
2387 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", | |
2388 | __func__); | |
2389 | pnfs_unregister_layoutdriver(&flexfilelayout_type); | |
90a0be00 JL |
2390 | if (ff_zero_group) { |
2391 | put_group_info(ff_zero_group); | |
2392 | ff_zero_group = NULL; | |
2393 | } | |
d67ae825 TH |
2394 | } |
2395 | ||
2396 | MODULE_ALIAS("nfs-layouttype4-4"); | |
2397 | ||
2398 | MODULE_LICENSE("GPL"); | |
2399 | MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); | |
2400 | ||
2401 | module_init(nfs4flexfilelayout_init); | |
2402 | module_exit(nfs4flexfilelayout_exit); |