Commit | Line | Data |
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7ab672ce DH |
1 | /* |
2 | * Module for the pnfs nfs4 file layout driver. | |
3 | * Defines all I/O and Policy interface operations, plus code | |
4 | * to register itself with the pNFS client. | |
5 | * | |
6 | * Copyright (c) 2002 | |
7 | * The Regents of the University of Michigan | |
8 | * All Rights Reserved | |
9 | * | |
10 | * Dean Hildebrand <dhildebz@umich.edu> | |
11 | * | |
12 | * Permission is granted to use, copy, create derivative works, and | |
13 | * redistribute this software and such derivative works for any purpose, | |
14 | * so long as the name of the University of Michigan is not used in | |
15 | * any advertising or publicity pertaining to the use or distribution | |
16 | * of this software without specific, written prior authorization. If | |
17 | * the above copyright notice or any other identification of the | |
18 | * University of Michigan is included in any copy of any portion of | |
19 | * this software, then the disclaimer below must also be included. | |
20 | * | |
21 | * This software is provided as is, without representation or warranty | |
22 | * of any kind either express or implied, including without limitation | |
23 | * the implied warranties of merchantability, fitness for a particular | |
24 | * purpose, or noninfringement. The Regents of the University of | |
25 | * Michigan shall not be liable for any damages, including special, | |
26 | * indirect, incidental, or consequential damages, with respect to any | |
27 | * claim arising out of or in connection with the use of the software, | |
28 | * even if it has been or is hereafter advised of the possibility of | |
29 | * such damages. | |
30 | */ | |
31 | ||
32 | #include <linux/nfs_fs.h> | |
19345cb2 | 33 | #include <linux/nfs_page.h> |
143cb494 | 34 | #include <linux/module.h> |
16b374ca | 35 | |
0a702195 WAA |
36 | #include <linux/sunrpc/metrics.h> |
37 | ||
16b374ca | 38 | #include "internal.h" |
9cb81968 | 39 | #include "delegation.h" |
16b374ca | 40 | #include "nfs4filelayout.h" |
7ab672ce DH |
41 | |
42 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
43 | ||
44 | MODULE_LICENSE("GPL"); | |
45 | MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>"); | |
46 | MODULE_DESCRIPTION("The NFSv4 file layout driver"); | |
47 | ||
cbdabc7f AA |
48 | #define FILELAYOUT_POLL_RETRY_MAX (15*HZ) |
49 | ||
cfe7f412 FI |
50 | static loff_t |
51 | filelayout_get_dense_offset(struct nfs4_filelayout_segment *flseg, | |
52 | loff_t offset) | |
53 | { | |
54 | u32 stripe_width = flseg->stripe_unit * flseg->dsaddr->stripe_count; | |
3476f114 CM |
55 | u64 stripe_no; |
56 | u32 rem; | |
cfe7f412 FI |
57 | |
58 | offset -= flseg->pattern_offset; | |
3476f114 CM |
59 | stripe_no = div_u64(offset, stripe_width); |
60 | div_u64_rem(offset, flseg->stripe_unit, &rem); | |
cfe7f412 | 61 | |
3476f114 | 62 | return stripe_no * flseg->stripe_unit + rem; |
cfe7f412 FI |
63 | } |
64 | ||
65 | /* This function is used by the layout driver to calculate the | |
66 | * offset of the file on the dserver based on whether the | |
67 | * layout type is STRIPE_DENSE or STRIPE_SPARSE | |
68 | */ | |
69 | static loff_t | |
70 | filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset) | |
71 | { | |
72 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
73 | ||
74 | switch (flseg->stripe_type) { | |
75 | case STRIPE_SPARSE: | |
76 | return offset; | |
77 | ||
78 | case STRIPE_DENSE: | |
79 | return filelayout_get_dense_offset(flseg, offset); | |
80 | } | |
81 | ||
82 | BUG(); | |
83 | } | |
84 | ||
cbdabc7f AA |
85 | static int filelayout_async_handle_error(struct rpc_task *task, |
86 | struct nfs4_state *state, | |
87 | struct nfs_client *clp, | |
88 | int *reset) | |
89 | { | |
9cb81968 AA |
90 | struct nfs_server *mds_server = NFS_SERVER(state->inode); |
91 | struct nfs_client *mds_client = mds_server->nfs_client; | |
92 | ||
cbdabc7f AA |
93 | if (task->tk_status >= 0) |
94 | return 0; | |
cbdabc7f AA |
95 | *reset = 0; |
96 | ||
97 | switch (task->tk_status) { | |
9cb81968 AA |
98 | /* MDS state errors */ |
99 | case -NFS4ERR_DELEG_REVOKED: | |
100 | case -NFS4ERR_ADMIN_REVOKED: | |
101 | case -NFS4ERR_BAD_STATEID: | |
2dc31756 | 102 | nfs_remove_bad_delegation(state->inode); |
9cb81968 | 103 | case -NFS4ERR_OPENMODE: |
9cb81968 AA |
104 | nfs4_schedule_stateid_recovery(mds_server, state); |
105 | goto wait_on_recovery; | |
106 | case -NFS4ERR_EXPIRED: | |
2dc31756 | 107 | nfs4_schedule_stateid_recovery(mds_server, state); |
9cb81968 AA |
108 | nfs4_schedule_lease_recovery(mds_client); |
109 | goto wait_on_recovery; | |
110 | /* DS session errors */ | |
cbdabc7f AA |
111 | case -NFS4ERR_BADSESSION: |
112 | case -NFS4ERR_BADSLOT: | |
113 | case -NFS4ERR_BAD_HIGH_SLOT: | |
114 | case -NFS4ERR_DEADSESSION: | |
115 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
116 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
117 | case -NFS4ERR_SEQ_MISORDERED: | |
118 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
119 | "flags 0x%x\n", __func__, task->tk_status, | |
120 | clp->cl_exchange_flags); | |
121 | nfs4_schedule_session_recovery(clp->cl_session); | |
122 | break; | |
123 | case -NFS4ERR_DELAY: | |
124 | case -NFS4ERR_GRACE: | |
125 | case -EKEYEXPIRED: | |
126 | rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX); | |
127 | break; | |
a8a4ae3a AA |
128 | case -NFS4ERR_RETRY_UNCACHED_REP: |
129 | break; | |
cbdabc7f AA |
130 | default: |
131 | dprintk("%s DS error. Retry through MDS %d\n", __func__, | |
132 | task->tk_status); | |
133 | *reset = 1; | |
134 | break; | |
135 | } | |
9cb81968 | 136 | out: |
cbdabc7f AA |
137 | task->tk_status = 0; |
138 | return -EAGAIN; | |
9cb81968 AA |
139 | wait_on_recovery: |
140 | rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); | |
141 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) | |
142 | rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); | |
143 | goto out; | |
cbdabc7f AA |
144 | } |
145 | ||
146 | /* NFS_PROTO call done callback routines */ | |
147 | ||
148 | static int filelayout_read_done_cb(struct rpc_task *task, | |
149 | struct nfs_read_data *data) | |
150 | { | |
cbdabc7f AA |
151 | int reset = 0; |
152 | ||
153 | dprintk("%s DS read\n", __func__); | |
154 | ||
155 | if (filelayout_async_handle_error(task, data->args.context->state, | |
156 | data->ds_clp, &reset) == -EAGAIN) { | |
157 | dprintk("%s calling restart ds_clp %p ds_clp->cl_session %p\n", | |
158 | __func__, data->ds_clp, data->ds_clp->cl_session); | |
159 | if (reset) { | |
1b0ae068 | 160 | pnfs_set_lo_fail(data->lseg); |
cbdabc7f | 161 | nfs4_reset_read(task, data); |
cbdabc7f | 162 | } |
d00c5d43 | 163 | rpc_restart_call_prepare(task); |
cbdabc7f AA |
164 | return -EAGAIN; |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
863a3c6c AA |
170 | /* |
171 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
172 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
173 | * rfc5661 is not clear about which credential should be used. | |
174 | */ | |
175 | static void | |
176 | filelayout_set_layoutcommit(struct nfs_write_data *wdata) | |
177 | { | |
178 | if (FILELAYOUT_LSEG(wdata->lseg)->commit_through_mds || | |
179 | wdata->res.verf->committed == NFS_FILE_SYNC) | |
180 | return; | |
181 | ||
182 | pnfs_set_layoutcommit(wdata); | |
183 | dprintk("%s ionde %lu pls_end_pos %lu\n", __func__, wdata->inode->i_ino, | |
acff5880 | 184 | (unsigned long) NFS_I(wdata->inode)->layout->plh_lwb); |
863a3c6c AA |
185 | } |
186 | ||
dc70d7b3 AA |
187 | /* |
188 | * Call ops for the async read/write cases | |
189 | * In the case of dense layouts, the offset needs to be reset to its | |
190 | * original value. | |
191 | */ | |
192 | static void filelayout_read_prepare(struct rpc_task *task, void *data) | |
193 | { | |
194 | struct nfs_read_data *rdata = (struct nfs_read_data *)data; | |
195 | ||
cbdabc7f AA |
196 | rdata->read_done_cb = filelayout_read_done_cb; |
197 | ||
dc70d7b3 AA |
198 | if (nfs41_setup_sequence(rdata->ds_clp->cl_session, |
199 | &rdata->args.seq_args, &rdata->res.seq_res, | |
9d12b216 | 200 | task)) |
dc70d7b3 AA |
201 | return; |
202 | ||
203 | rpc_call_start(task); | |
204 | } | |
205 | ||
206 | static void filelayout_read_call_done(struct rpc_task *task, void *data) | |
207 | { | |
208 | struct nfs_read_data *rdata = (struct nfs_read_data *)data; | |
209 | ||
210 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
211 | ||
212 | /* Note this may cause RPC to be resent */ | |
213 | rdata->mds_ops->rpc_call_done(task, data); | |
214 | } | |
215 | ||
0a702195 WAA |
216 | static void filelayout_read_count_stats(struct rpc_task *task, void *data) |
217 | { | |
218 | struct nfs_read_data *rdata = (struct nfs_read_data *)data; | |
219 | ||
220 | rpc_count_iostats(task, NFS_SERVER(rdata->inode)->client->cl_metrics); | |
221 | } | |
222 | ||
dc70d7b3 AA |
223 | static void filelayout_read_release(void *data) |
224 | { | |
225 | struct nfs_read_data *rdata = (struct nfs_read_data *)data; | |
226 | ||
8dd37758 | 227 | put_lseg(rdata->lseg); |
dc70d7b3 AA |
228 | rdata->mds_ops->rpc_release(data); |
229 | } | |
230 | ||
a69aef14 FI |
231 | static int filelayout_write_done_cb(struct rpc_task *task, |
232 | struct nfs_write_data *data) | |
233 | { | |
234 | int reset = 0; | |
235 | ||
236 | if (filelayout_async_handle_error(task, data->args.context->state, | |
237 | data->ds_clp, &reset) == -EAGAIN) { | |
a69aef14 FI |
238 | dprintk("%s calling restart ds_clp %p ds_clp->cl_session %p\n", |
239 | __func__, data->ds_clp, data->ds_clp->cl_session); | |
240 | if (reset) { | |
1b0ae068 | 241 | pnfs_set_lo_fail(data->lseg); |
a69aef14 | 242 | nfs4_reset_write(task, data); |
d00c5d43 TM |
243 | } |
244 | rpc_restart_call_prepare(task); | |
a69aef14 FI |
245 | return -EAGAIN; |
246 | } | |
247 | ||
863a3c6c | 248 | filelayout_set_layoutcommit(data); |
a69aef14 FI |
249 | return 0; |
250 | } | |
251 | ||
e0c2b380 FI |
252 | /* Fake up some data that will cause nfs_commit_release to retry the writes. */ |
253 | static void prepare_to_resend_writes(struct nfs_write_data *data) | |
254 | { | |
255 | struct nfs_page *first = nfs_list_entry(data->pages.next); | |
256 | ||
257 | data->task.tk_status = 0; | |
258 | memcpy(data->verf.verifier, first->wb_verf.verifier, | |
259 | sizeof(first->wb_verf.verifier)); | |
260 | data->verf.verifier[0]++; /* ensure verifier mismatch */ | |
261 | } | |
262 | ||
263 | static int filelayout_commit_done_cb(struct rpc_task *task, | |
264 | struct nfs_write_data *data) | |
265 | { | |
266 | int reset = 0; | |
267 | ||
268 | if (filelayout_async_handle_error(task, data->args.context->state, | |
269 | data->ds_clp, &reset) == -EAGAIN) { | |
270 | dprintk("%s calling restart ds_clp %p ds_clp->cl_session %p\n", | |
271 | __func__, data->ds_clp, data->ds_clp->cl_session); | |
272 | if (reset) { | |
273 | prepare_to_resend_writes(data); | |
1b0ae068 | 274 | pnfs_set_lo_fail(data->lseg); |
e0c2b380 | 275 | } else |
d00c5d43 | 276 | rpc_restart_call_prepare(task); |
e0c2b380 FI |
277 | return -EAGAIN; |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
a69aef14 FI |
283 | static void filelayout_write_prepare(struct rpc_task *task, void *data) |
284 | { | |
285 | struct nfs_write_data *wdata = (struct nfs_write_data *)data; | |
286 | ||
287 | if (nfs41_setup_sequence(wdata->ds_clp->cl_session, | |
288 | &wdata->args.seq_args, &wdata->res.seq_res, | |
9d12b216 | 289 | task)) |
a69aef14 FI |
290 | return; |
291 | ||
292 | rpc_call_start(task); | |
293 | } | |
294 | ||
295 | static void filelayout_write_call_done(struct rpc_task *task, void *data) | |
296 | { | |
297 | struct nfs_write_data *wdata = (struct nfs_write_data *)data; | |
298 | ||
299 | /* Note this may cause RPC to be resent */ | |
300 | wdata->mds_ops->rpc_call_done(task, data); | |
301 | } | |
302 | ||
0a702195 WAA |
303 | static void filelayout_write_count_stats(struct rpc_task *task, void *data) |
304 | { | |
305 | struct nfs_write_data *wdata = (struct nfs_write_data *)data; | |
306 | ||
307 | rpc_count_iostats(task, NFS_SERVER(wdata->inode)->client->cl_metrics); | |
308 | } | |
309 | ||
a69aef14 FI |
310 | static void filelayout_write_release(void *data) |
311 | { | |
312 | struct nfs_write_data *wdata = (struct nfs_write_data *)data; | |
313 | ||
8dd37758 | 314 | put_lseg(wdata->lseg); |
a69aef14 FI |
315 | wdata->mds_ops->rpc_release(data); |
316 | } | |
317 | ||
e0c2b380 FI |
318 | static void filelayout_commit_release(void *data) |
319 | { | |
320 | struct nfs_write_data *wdata = (struct nfs_write_data *)data; | |
321 | ||
322 | nfs_commit_release_pages(wdata); | |
323 | if (atomic_dec_and_test(&NFS_I(wdata->inode)->commits_outstanding)) | |
324 | nfs_commit_clear_lock(NFS_I(wdata->inode)); | |
8dd37758 | 325 | put_lseg(wdata->lseg); |
e0c2b380 FI |
326 | nfs_commitdata_release(wdata); |
327 | } | |
328 | ||
17280175 | 329 | static const struct rpc_call_ops filelayout_read_call_ops = { |
dc70d7b3 AA |
330 | .rpc_call_prepare = filelayout_read_prepare, |
331 | .rpc_call_done = filelayout_read_call_done, | |
0a702195 | 332 | .rpc_count_stats = filelayout_read_count_stats, |
dc70d7b3 AA |
333 | .rpc_release = filelayout_read_release, |
334 | }; | |
335 | ||
17280175 | 336 | static const struct rpc_call_ops filelayout_write_call_ops = { |
a69aef14 FI |
337 | .rpc_call_prepare = filelayout_write_prepare, |
338 | .rpc_call_done = filelayout_write_call_done, | |
0a702195 | 339 | .rpc_count_stats = filelayout_write_count_stats, |
a69aef14 FI |
340 | .rpc_release = filelayout_write_release, |
341 | }; | |
342 | ||
17280175 | 343 | static const struct rpc_call_ops filelayout_commit_call_ops = { |
e0c2b380 FI |
344 | .rpc_call_prepare = filelayout_write_prepare, |
345 | .rpc_call_done = filelayout_write_call_done, | |
0a702195 | 346 | .rpc_count_stats = filelayout_write_count_stats, |
e0c2b380 FI |
347 | .rpc_release = filelayout_commit_release, |
348 | }; | |
349 | ||
dc70d7b3 AA |
350 | static enum pnfs_try_status |
351 | filelayout_read_pagelist(struct nfs_read_data *data) | |
352 | { | |
353 | struct pnfs_layout_segment *lseg = data->lseg; | |
354 | struct nfs4_pnfs_ds *ds; | |
355 | loff_t offset = data->args.offset; | |
356 | u32 j, idx; | |
357 | struct nfs_fh *fh; | |
358 | int status; | |
359 | ||
360 | dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", | |
361 | __func__, data->inode->i_ino, | |
362 | data->args.pgbase, (size_t)data->args.count, offset); | |
363 | ||
c47abcf8 AA |
364 | if (test_bit(NFS_DEVICEID_INVALID, &FILELAYOUT_DEVID_NODE(lseg)->flags)) |
365 | return PNFS_NOT_ATTEMPTED; | |
366 | ||
dc70d7b3 AA |
367 | /* Retrieve the correct rpc_client for the byte range */ |
368 | j = nfs4_fl_calc_j_index(lseg, offset); | |
369 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
370 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
371 | if (!ds) { | |
568e8c49 AA |
372 | /* Either layout fh index faulty, or ds connect failed */ |
373 | set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags); | |
374 | set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags); | |
dc70d7b3 AA |
375 | return PNFS_NOT_ATTEMPTED; |
376 | } | |
c9895cb6 | 377 | dprintk("%s USE DS: %s\n", __func__, ds->ds_remotestr); |
dc70d7b3 AA |
378 | |
379 | /* No multipath support. Use first DS */ | |
380 | data->ds_clp = ds->ds_clp; | |
381 | fh = nfs4_fl_select_ds_fh(lseg, j); | |
382 | if (fh) | |
383 | data->args.fh = fh; | |
384 | ||
385 | data->args.offset = filelayout_get_dserver_offset(lseg, offset); | |
386 | data->mds_offset = offset; | |
387 | ||
388 | /* Perform an asynchronous read to ds */ | |
389 | status = nfs_initiate_read(data, ds->ds_clp->cl_rpcclient, | |
390 | &filelayout_read_call_ops); | |
391 | BUG_ON(status != 0); | |
392 | return PNFS_ATTEMPTED; | |
393 | } | |
394 | ||
a69aef14 | 395 | /* Perform async writes. */ |
0382b744 AA |
396 | static enum pnfs_try_status |
397 | filelayout_write_pagelist(struct nfs_write_data *data, int sync) | |
398 | { | |
a69aef14 FI |
399 | struct pnfs_layout_segment *lseg = data->lseg; |
400 | struct nfs4_pnfs_ds *ds; | |
401 | loff_t offset = data->args.offset; | |
402 | u32 j, idx; | |
403 | struct nfs_fh *fh; | |
404 | int status; | |
405 | ||
c47abcf8 AA |
406 | if (test_bit(NFS_DEVICEID_INVALID, &FILELAYOUT_DEVID_NODE(lseg)->flags)) |
407 | return PNFS_NOT_ATTEMPTED; | |
408 | ||
a69aef14 FI |
409 | /* Retrieve the correct rpc_client for the byte range */ |
410 | j = nfs4_fl_calc_j_index(lseg, offset); | |
411 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
412 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
413 | if (!ds) { | |
a030889a WAA |
414 | printk(KERN_ERR "NFS: %s: prepare_ds failed, use MDS\n", |
415 | __func__); | |
a69aef14 FI |
416 | set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags); |
417 | set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags); | |
418 | return PNFS_NOT_ATTEMPTED; | |
419 | } | |
c9895cb6 | 420 | dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s\n", __func__, |
a69aef14 | 421 | data->inode->i_ino, sync, (size_t) data->args.count, offset, |
c9895cb6 | 422 | ds->ds_remotestr); |
a69aef14 | 423 | |
a69aef14 FI |
424 | data->write_done_cb = filelayout_write_done_cb; |
425 | data->ds_clp = ds->ds_clp; | |
426 | fh = nfs4_fl_select_ds_fh(lseg, j); | |
427 | if (fh) | |
428 | data->args.fh = fh; | |
429 | /* | |
430 | * Get the file offset on the dserver. Set the write offset to | |
431 | * this offset and save the original offset. | |
432 | */ | |
433 | data->args.offset = filelayout_get_dserver_offset(lseg, offset); | |
a69aef14 FI |
434 | |
435 | /* Perform an asynchronous write */ | |
436 | status = nfs_initiate_write(data, ds->ds_clp->cl_rpcclient, | |
437 | &filelayout_write_call_ops, sync); | |
438 | BUG_ON(status != 0); | |
439 | return PNFS_ATTEMPTED; | |
0382b744 AA |
440 | } |
441 | ||
16b374ca AA |
442 | /* |
443 | * filelayout_check_layout() | |
444 | * | |
445 | * Make sure layout segment parameters are sane WRT the device. | |
446 | * At this point no generic layer initialization of the lseg has occurred, | |
447 | * and nothing has been added to the layout_hdr cache. | |
448 | * | |
449 | */ | |
450 | static int | |
451 | filelayout_check_layout(struct pnfs_layout_hdr *lo, | |
452 | struct nfs4_filelayout_segment *fl, | |
453 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
454 | struct nfs4_deviceid *id, |
455 | gfp_t gfp_flags) | |
16b374ca | 456 | { |
a1eaecbc | 457 | struct nfs4_deviceid_node *d; |
16b374ca AA |
458 | struct nfs4_file_layout_dsaddr *dsaddr; |
459 | int status = -EINVAL; | |
b7edfaa1 | 460 | struct nfs_server *nfss = NFS_SERVER(lo->plh_inode); |
16b374ca AA |
461 | |
462 | dprintk("--> %s\n", __func__); | |
463 | ||
7c24d948 AA |
464 | /* FIXME: remove this check when layout segment support is added */ |
465 | if (lgr->range.offset != 0 || | |
466 | lgr->range.length != NFS4_MAX_UINT64) { | |
467 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
468 | __func__); | |
469 | goto out; | |
470 | } | |
471 | ||
16b374ca | 472 | if (fl->pattern_offset > lgr->range.offset) { |
3b6445a6 | 473 | dprintk("%s pattern_offset %lld too large\n", |
16b374ca AA |
474 | __func__, fl->pattern_offset); |
475 | goto out; | |
476 | } | |
477 | ||
75247aff BH |
478 | if (!fl->stripe_unit || fl->stripe_unit % PAGE_SIZE) { |
479 | dprintk("%s Invalid stripe unit (%u)\n", | |
16b374ca AA |
480 | __func__, fl->stripe_unit); |
481 | goto out; | |
482 | } | |
483 | ||
484 | /* find and reference the deviceid */ | |
35c8bb54 BH |
485 | d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode)->pnfs_curr_ld, |
486 | NFS_SERVER(lo->plh_inode)->nfs_client, id); | |
a1eaecbc | 487 | if (d == NULL) { |
a75b9df9 | 488 | dsaddr = get_device_info(lo->plh_inode, id, gfp_flags); |
16b374ca AA |
489 | if (dsaddr == NULL) |
490 | goto out; | |
a1eaecbc BH |
491 | } else |
492 | dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node); | |
c47abcf8 AA |
493 | /* Found deviceid is being reaped */ |
494 | if (test_bit(NFS_DEVICEID_INVALID, &dsaddr->id_node.flags)) | |
495 | goto out_put; | |
496 | ||
16b374ca AA |
497 | fl->dsaddr = dsaddr; |
498 | ||
e414966b CL |
499 | if (fl->first_stripe_index >= dsaddr->stripe_count) { |
500 | dprintk("%s Bad first_stripe_index %u\n", | |
16b374ca AA |
501 | __func__, fl->first_stripe_index); |
502 | goto out_put; | |
503 | } | |
504 | ||
505 | if ((fl->stripe_type == STRIPE_SPARSE && | |
506 | fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) || | |
507 | (fl->stripe_type == STRIPE_DENSE && | |
508 | fl->num_fh != dsaddr->stripe_count)) { | |
509 | dprintk("%s num_fh %u not valid for given packing\n", | |
510 | __func__, fl->num_fh); | |
511 | goto out_put; | |
512 | } | |
513 | ||
514 | if (fl->stripe_unit % nfss->rsize || fl->stripe_unit % nfss->wsize) { | |
515 | dprintk("%s Stripe unit (%u) not aligned with rsize %u " | |
516 | "wsize %u\n", __func__, fl->stripe_unit, nfss->rsize, | |
517 | nfss->wsize); | |
518 | } | |
519 | ||
520 | status = 0; | |
521 | out: | |
522 | dprintk("--> %s returns %d\n", __func__, status); | |
523 | return status; | |
524 | out_put: | |
ea8eecdd | 525 | nfs4_fl_put_deviceid(dsaddr); |
16b374ca AA |
526 | goto out; |
527 | } | |
528 | ||
529 | static void filelayout_free_fh_array(struct nfs4_filelayout_segment *fl) | |
530 | { | |
531 | int i; | |
532 | ||
533 | for (i = 0; i < fl->num_fh; i++) { | |
534 | if (!fl->fh_array[i]) | |
535 | break; | |
536 | kfree(fl->fh_array[i]); | |
537 | } | |
538 | kfree(fl->fh_array); | |
539 | fl->fh_array = NULL; | |
540 | } | |
541 | ||
542 | static void | |
543 | _filelayout_free_lseg(struct nfs4_filelayout_segment *fl) | |
544 | { | |
545 | filelayout_free_fh_array(fl); | |
546 | kfree(fl); | |
547 | } | |
548 | ||
549 | static int | |
550 | filelayout_decode_layout(struct pnfs_layout_hdr *flo, | |
551 | struct nfs4_filelayout_segment *fl, | |
552 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
553 | struct nfs4_deviceid *id, |
554 | gfp_t gfp_flags) | |
16b374ca | 555 | { |
35124a09 | 556 | struct xdr_stream stream; |
f7da7a12 | 557 | struct xdr_buf buf; |
35124a09 WAA |
558 | struct page *scratch; |
559 | __be32 *p; | |
16b374ca AA |
560 | uint32_t nfl_util; |
561 | int i; | |
562 | ||
563 | dprintk("%s: set_layout_map Begin\n", __func__); | |
564 | ||
a75b9df9 | 565 | scratch = alloc_page(gfp_flags); |
35124a09 WAA |
566 | if (!scratch) |
567 | return -ENOMEM; | |
568 | ||
f7da7a12 | 569 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); |
35124a09 WAA |
570 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); |
571 | ||
572 | /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8), | |
573 | * num_fh (4) */ | |
574 | p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20); | |
575 | if (unlikely(!p)) | |
576 | goto out_err; | |
577 | ||
16b374ca AA |
578 | memcpy(id, p, sizeof(*id)); |
579 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
a1eaecbc | 580 | nfs4_print_deviceid(id); |
16b374ca AA |
581 | |
582 | nfl_util = be32_to_cpup(p++); | |
583 | if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS) | |
584 | fl->commit_through_mds = 1; | |
585 | if (nfl_util & NFL4_UFLG_DENSE) | |
586 | fl->stripe_type = STRIPE_DENSE; | |
587 | else | |
588 | fl->stripe_type = STRIPE_SPARSE; | |
589 | fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK; | |
590 | ||
591 | fl->first_stripe_index = be32_to_cpup(p++); | |
592 | p = xdr_decode_hyper(p, &fl->pattern_offset); | |
593 | fl->num_fh = be32_to_cpup(p++); | |
594 | ||
595 | dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n", | |
596 | __func__, nfl_util, fl->num_fh, fl->first_stripe_index, | |
597 | fl->pattern_offset); | |
598 | ||
cec765cf AA |
599 | /* Note that a zero value for num_fh is legal for STRIPE_SPARSE. |
600 | * Futher checking is done in filelayout_check_layout */ | |
e414966b | 601 | if (fl->num_fh > |
cec765cf | 602 | max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT)) |
35124a09 WAA |
603 | goto out_err; |
604 | ||
cec765cf AA |
605 | if (fl->num_fh > 0) { |
606 | fl->fh_array = kzalloc(fl->num_fh * sizeof(struct nfs_fh *), | |
607 | gfp_flags); | |
608 | if (!fl->fh_array) | |
609 | goto out_err; | |
610 | } | |
16b374ca AA |
611 | |
612 | for (i = 0; i < fl->num_fh; i++) { | |
613 | /* Do we want to use a mempool here? */ | |
a75b9df9 | 614 | fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags); |
35124a09 WAA |
615 | if (!fl->fh_array[i]) |
616 | goto out_err_free; | |
617 | ||
618 | p = xdr_inline_decode(&stream, 4); | |
619 | if (unlikely(!p)) | |
620 | goto out_err_free; | |
16b374ca AA |
621 | fl->fh_array[i]->size = be32_to_cpup(p++); |
622 | if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) { | |
f9fd2d9c | 623 | printk(KERN_ERR "NFS: Too big fh %d received %d\n", |
16b374ca | 624 | i, fl->fh_array[i]->size); |
35124a09 | 625 | goto out_err_free; |
16b374ca | 626 | } |
35124a09 WAA |
627 | |
628 | p = xdr_inline_decode(&stream, fl->fh_array[i]->size); | |
629 | if (unlikely(!p)) | |
630 | goto out_err_free; | |
16b374ca | 631 | memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size); |
16b374ca AA |
632 | dprintk("DEBUG: %s: fh len %d\n", __func__, |
633 | fl->fh_array[i]->size); | |
634 | } | |
635 | ||
35124a09 | 636 | __free_page(scratch); |
16b374ca | 637 | return 0; |
35124a09 WAA |
638 | |
639 | out_err_free: | |
640 | filelayout_free_fh_array(fl); | |
641 | out_err: | |
642 | __free_page(scratch); | |
643 | return -EIO; | |
16b374ca AA |
644 | } |
645 | ||
c879513e FI |
646 | static void |
647 | filelayout_free_lseg(struct pnfs_layout_segment *lseg) | |
648 | { | |
649 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
650 | ||
651 | dprintk("--> %s\n", __func__); | |
652 | nfs4_fl_put_deviceid(fl->dsaddr); | |
425eb736 | 653 | kfree(fl->commit_buckets); |
c879513e FI |
654 | _filelayout_free_lseg(fl); |
655 | } | |
656 | ||
16b374ca AA |
657 | static struct pnfs_layout_segment * |
658 | filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, | |
a75b9df9 TM |
659 | struct nfs4_layoutget_res *lgr, |
660 | gfp_t gfp_flags) | |
16b374ca AA |
661 | { |
662 | struct nfs4_filelayout_segment *fl; | |
663 | int rc; | |
664 | struct nfs4_deviceid id; | |
665 | ||
666 | dprintk("--> %s\n", __func__); | |
a75b9df9 | 667 | fl = kzalloc(sizeof(*fl), gfp_flags); |
16b374ca AA |
668 | if (!fl) |
669 | return NULL; | |
670 | ||
a75b9df9 TM |
671 | rc = filelayout_decode_layout(layoutid, fl, lgr, &id, gfp_flags); |
672 | if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id, gfp_flags)) { | |
16b374ca AA |
673 | _filelayout_free_lseg(fl); |
674 | return NULL; | |
675 | } | |
425eb736 FI |
676 | |
677 | /* This assumes there is only one IOMODE_RW lseg. What | |
678 | * we really want to do is have a layout_hdr level | |
679 | * dictionary of <multipath_list4, fh> keys, each | |
680 | * associated with a struct list_head, populated by calls | |
681 | * to filelayout_write_pagelist(). | |
682 | * */ | |
683 | if ((!fl->commit_through_mds) && (lgr->range.iomode == IOMODE_RW)) { | |
684 | int i; | |
685 | int size = (fl->stripe_type == STRIPE_SPARSE) ? | |
686 | fl->dsaddr->ds_num : fl->dsaddr->stripe_count; | |
687 | ||
d6d6dc7c | 688 | fl->commit_buckets = kcalloc(size, sizeof(struct nfs4_fl_commit_bucket), gfp_flags); |
425eb736 FI |
689 | if (!fl->commit_buckets) { |
690 | filelayout_free_lseg(&fl->generic_hdr); | |
691 | return NULL; | |
692 | } | |
693 | fl->number_of_buckets = size; | |
d6d6dc7c FI |
694 | for (i = 0; i < size; i++) { |
695 | INIT_LIST_HEAD(&fl->commit_buckets[i].written); | |
696 | INIT_LIST_HEAD(&fl->commit_buckets[i].committing); | |
697 | } | |
425eb736 | 698 | } |
16b374ca AA |
699 | return &fl->generic_hdr; |
700 | } | |
701 | ||
94ad1c80 FI |
702 | /* |
703 | * filelayout_pg_test(). Called by nfs_can_coalesce_requests() | |
704 | * | |
18ad0a9f BH |
705 | * return true : coalesce page |
706 | * return false : don't coalesce page | |
94ad1c80 | 707 | */ |
1751c363 | 708 | static bool |
94ad1c80 FI |
709 | filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
710 | struct nfs_page *req) | |
711 | { | |
712 | u64 p_stripe, r_stripe; | |
713 | u32 stripe_unit; | |
714 | ||
19345cb2 BH |
715 | if (!pnfs_generic_pg_test(pgio, prev, req) || |
716 | !nfs_generic_pg_test(pgio, prev, req)) | |
717 | return false; | |
89a58e32 | 718 | |
94ad1c80 FI |
719 | p_stripe = (u64)prev->wb_index << PAGE_CACHE_SHIFT; |
720 | r_stripe = (u64)req->wb_index << PAGE_CACHE_SHIFT; | |
721 | stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit; | |
722 | ||
723 | do_div(p_stripe, stripe_unit); | |
724 | do_div(r_stripe, stripe_unit); | |
725 | ||
726 | return (p_stripe == r_stripe); | |
727 | } | |
728 | ||
17280175 | 729 | static void |
7c24d948 AA |
730 | filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, |
731 | struct nfs_page *req) | |
732 | { | |
733 | BUG_ON(pgio->pg_lseg != NULL); | |
734 | ||
735 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
736 | req->wb_context, | |
737 | 0, | |
738 | NFS4_MAX_UINT64, | |
739 | IOMODE_READ, | |
740 | GFP_KERNEL); | |
741 | /* If no lseg, fall back to read through mds */ | |
742 | if (pgio->pg_lseg == NULL) | |
1f945357 | 743 | nfs_pageio_reset_read_mds(pgio); |
7c24d948 AA |
744 | } |
745 | ||
17280175 | 746 | static void |
7c24d948 AA |
747 | filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, |
748 | struct nfs_page *req) | |
749 | { | |
750 | BUG_ON(pgio->pg_lseg != NULL); | |
751 | ||
752 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
753 | req->wb_context, | |
754 | 0, | |
755 | NFS4_MAX_UINT64, | |
756 | IOMODE_RW, | |
757 | GFP_NOFS); | |
758 | /* If no lseg, fall back to write through mds */ | |
759 | if (pgio->pg_lseg == NULL) | |
1f945357 | 760 | nfs_pageio_reset_write_mds(pgio); |
7c24d948 AA |
761 | } |
762 | ||
1751c363 | 763 | static const struct nfs_pageio_ops filelayout_pg_read_ops = { |
7c24d948 | 764 | .pg_init = filelayout_pg_init_read, |
1751c363 | 765 | .pg_test = filelayout_pg_test, |
493292dd | 766 | .pg_doio = pnfs_generic_pg_readpages, |
1751c363 TM |
767 | }; |
768 | ||
769 | static const struct nfs_pageio_ops filelayout_pg_write_ops = { | |
7c24d948 | 770 | .pg_init = filelayout_pg_init_write, |
1751c363 | 771 | .pg_test = filelayout_pg_test, |
dce81290 | 772 | .pg_doio = pnfs_generic_pg_writepages, |
1751c363 TM |
773 | }; |
774 | ||
e0c2b380 FI |
775 | static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j) |
776 | { | |
777 | if (fl->stripe_type == STRIPE_SPARSE) | |
778 | return nfs4_fl_calc_ds_index(&fl->generic_hdr, j); | |
779 | else | |
780 | return j; | |
781 | } | |
782 | ||
d6d6dc7c FI |
783 | /* The generic layer is about to remove the req from the commit list. |
784 | * If this will make the bucket empty, it will need to put the lseg reference. | |
d6d6dc7c | 785 | */ |
8dd37758 TM |
786 | static void |
787 | filelayout_clear_request_commit(struct nfs_page *req) | |
d6d6dc7c | 788 | { |
8dd37758 TM |
789 | struct pnfs_layout_segment *freeme = NULL; |
790 | struct inode *inode = req->wb_context->dentry->d_inode; | |
791 | ||
792 | spin_lock(&inode->i_lock); | |
793 | if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags)) | |
794 | goto out; | |
d6d6dc7c | 795 | if (list_is_singular(&req->wb_list)) { |
d6d6dc7c FI |
796 | struct pnfs_layout_segment *lseg; |
797 | ||
798 | /* From here we can find the bucket, but for the moment, | |
799 | * since there is only one relevant lseg... | |
800 | */ | |
801 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { | |
8dd37758 TM |
802 | if (lseg->pls_range.iomode == IOMODE_RW) { |
803 | freeme = lseg; | |
804 | break; | |
805 | } | |
d6d6dc7c FI |
806 | } |
807 | } | |
8dd37758 TM |
808 | out: |
809 | nfs_request_remove_commit_list(req); | |
810 | spin_unlock(&inode->i_lock); | |
811 | put_lseg(freeme); | |
d6d6dc7c FI |
812 | } |
813 | ||
814 | static struct list_head * | |
815 | filelayout_choose_commit_list(struct nfs_page *req, | |
816 | struct pnfs_layout_segment *lseg) | |
e0c2b380 | 817 | { |
e0c2b380 FI |
818 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); |
819 | u32 i, j; | |
820 | struct list_head *list; | |
821 | ||
d6d6dc7c FI |
822 | if (fl->commit_through_mds) |
823 | return &NFS_I(req->wb_context->dentry->d_inode)->commit_list; | |
824 | ||
e0c2b380 FI |
825 | /* Note that we are calling nfs4_fl_calc_j_index on each page |
826 | * that ends up being committed to a data server. An attractive | |
827 | * alternative is to add a field to nfs_write_data and nfs_page | |
828 | * to store the value calculated in filelayout_write_pagelist | |
829 | * and just use that here. | |
830 | */ | |
831 | j = nfs4_fl_calc_j_index(lseg, | |
832 | (loff_t)req->wb_index << PAGE_CACHE_SHIFT); | |
833 | i = select_bucket_index(fl, j); | |
d6d6dc7c | 834 | list = &fl->commit_buckets[i].written; |
e0c2b380 | 835 | if (list_empty(list)) { |
d6d6dc7c FI |
836 | /* Non-empty buckets hold a reference on the lseg. That ref |
837 | * is normally transferred to the COMMIT call and released | |
838 | * there. It could also be released if the last req is pulled | |
839 | * off due to a rewrite, in which case it will be done in | |
840 | * filelayout_remove_commit_req | |
841 | */ | |
e0c2b380 FI |
842 | get_lseg(lseg); |
843 | } | |
8dd37758 | 844 | set_bit(PG_COMMIT_TO_DS, &req->wb_flags); |
e0c2b380 FI |
845 | return list; |
846 | } | |
847 | ||
8dd37758 TM |
848 | static void |
849 | filelayout_mark_request_commit(struct nfs_page *req, | |
850 | struct pnfs_layout_segment *lseg) | |
851 | { | |
852 | struct list_head *list; | |
853 | ||
854 | list = filelayout_choose_commit_list(req, lseg); | |
855 | nfs_request_add_commit_list(req, list); | |
856 | } | |
857 | ||
e0c2b380 FI |
858 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
859 | { | |
860 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
861 | ||
862 | if (flseg->stripe_type == STRIPE_SPARSE) | |
863 | return i; | |
864 | else | |
865 | return nfs4_fl_calc_ds_index(lseg, i); | |
866 | } | |
867 | ||
868 | static struct nfs_fh * | |
869 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
870 | { | |
871 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
872 | ||
873 | if (flseg->stripe_type == STRIPE_SPARSE) { | |
874 | if (flseg->num_fh == 1) | |
875 | i = 0; | |
876 | else if (flseg->num_fh == 0) | |
877 | /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ | |
878 | return NULL; | |
879 | } | |
880 | return flseg->fh_array[i]; | |
881 | } | |
882 | ||
883 | static int filelayout_initiate_commit(struct nfs_write_data *data, int how) | |
884 | { | |
885 | struct pnfs_layout_segment *lseg = data->lseg; | |
886 | struct nfs4_pnfs_ds *ds; | |
887 | u32 idx; | |
888 | struct nfs_fh *fh; | |
889 | ||
890 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
891 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
892 | if (!ds) { | |
a030889a WAA |
893 | printk(KERN_ERR "NFS: %s: prepare_ds failed, use MDS\n", |
894 | __func__); | |
e0c2b380 FI |
895 | set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags); |
896 | set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags); | |
897 | prepare_to_resend_writes(data); | |
8dd37758 | 898 | filelayout_commit_release(data); |
e0c2b380 FI |
899 | return -EAGAIN; |
900 | } | |
901 | dprintk("%s ino %lu, how %d\n", __func__, data->inode->i_ino, how); | |
902 | data->write_done_cb = filelayout_commit_done_cb; | |
903 | data->ds_clp = ds->ds_clp; | |
904 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
905 | if (fh) | |
906 | data->args.fh = fh; | |
907 | return nfs_initiate_commit(data, ds->ds_clp->cl_rpcclient, | |
908 | &filelayout_commit_call_ops, how); | |
909 | } | |
910 | ||
911 | /* | |
912 | * This is only useful while we are using whole file layouts. | |
913 | */ | |
d6d6dc7c FI |
914 | static struct pnfs_layout_segment * |
915 | find_only_write_lseg_locked(struct inode *inode) | |
e0c2b380 | 916 | { |
d6d6dc7c | 917 | struct pnfs_layout_segment *lseg; |
e0c2b380 | 918 | |
e0c2b380 FI |
919 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) |
920 | if (lseg->pls_range.iomode == IOMODE_RW) | |
8dd37758 | 921 | return lseg; |
d6d6dc7c FI |
922 | return NULL; |
923 | } | |
924 | ||
925 | static struct pnfs_layout_segment *find_only_write_lseg(struct inode *inode) | |
926 | { | |
927 | struct pnfs_layout_segment *rv; | |
928 | ||
929 | spin_lock(&inode->i_lock); | |
930 | rv = find_only_write_lseg_locked(inode); | |
8dd37758 TM |
931 | if (rv) |
932 | get_lseg(rv); | |
e0c2b380 FI |
933 | spin_unlock(&inode->i_lock); |
934 | return rv; | |
935 | } | |
936 | ||
8dd37758 | 937 | static int |
3b3be88d TM |
938 | filelayout_scan_ds_commit_list(struct nfs4_fl_commit_bucket *bucket, int max, |
939 | spinlock_t *lock) | |
8dd37758 TM |
940 | { |
941 | struct list_head *src = &bucket->written; | |
942 | struct list_head *dst = &bucket->committing; | |
943 | struct nfs_page *req, *tmp; | |
944 | int ret = 0; | |
945 | ||
946 | list_for_each_entry_safe(req, tmp, src, wb_list) { | |
947 | if (!nfs_lock_request(req)) | |
948 | continue; | |
3b3be88d TM |
949 | if (cond_resched_lock(lock)) |
950 | list_safe_reset_next(req, tmp, wb_list); | |
8dd37758 TM |
951 | nfs_request_remove_commit_list(req); |
952 | clear_bit(PG_COMMIT_TO_DS, &req->wb_flags); | |
953 | nfs_list_add_request(req, dst); | |
954 | ret++; | |
955 | if (ret == max) | |
956 | break; | |
957 | } | |
958 | return ret; | |
959 | } | |
960 | ||
d6d6dc7c FI |
961 | /* Move reqs from written to committing lists, returning count of number moved. |
962 | * Note called with i_lock held. | |
963 | */ | |
3b3be88d TM |
964 | static int filelayout_scan_commit_lists(struct inode *inode, int max, |
965 | spinlock_t *lock) | |
d6d6dc7c FI |
966 | { |
967 | struct pnfs_layout_segment *lseg; | |
968 | struct nfs4_filelayout_segment *fl; | |
969 | int i, rv = 0, cnt; | |
970 | ||
971 | lseg = find_only_write_lseg_locked(inode); | |
972 | if (!lseg) | |
8dd37758 | 973 | goto out_done; |
d6d6dc7c FI |
974 | fl = FILELAYOUT_LSEG(lseg); |
975 | if (fl->commit_through_mds) | |
8dd37758 TM |
976 | goto out_done; |
977 | for (i = 0; i < fl->number_of_buckets && max != 0; i++) { | |
3b3be88d TM |
978 | cnt = filelayout_scan_ds_commit_list(&fl->commit_buckets[i], |
979 | max, lock); | |
d6d6dc7c FI |
980 | max -= cnt; |
981 | rv += cnt; | |
982 | } | |
8dd37758 | 983 | out_done: |
d6d6dc7c FI |
984 | return rv; |
985 | } | |
986 | ||
9390f425 TM |
987 | static unsigned int |
988 | alloc_ds_commits(struct inode *inode, struct list_head *list) | |
e0c2b380 FI |
989 | { |
990 | struct pnfs_layout_segment *lseg; | |
991 | struct nfs4_filelayout_segment *fl; | |
992 | struct nfs_write_data *data; | |
993 | int i, j; | |
9390f425 | 994 | unsigned int nreq = 0; |
e0c2b380 FI |
995 | |
996 | /* Won't need this when non-whole file layout segments are supported | |
997 | * instead we will use a pnfs_layout_hdr structure */ | |
998 | lseg = find_only_write_lseg(inode); | |
999 | if (!lseg) | |
1000 | return 0; | |
1001 | fl = FILELAYOUT_LSEG(lseg); | |
1002 | for (i = 0; i < fl->number_of_buckets; i++) { | |
d6d6dc7c | 1003 | if (list_empty(&fl->commit_buckets[i].committing)) |
e0c2b380 FI |
1004 | continue; |
1005 | data = nfs_commitdata_alloc(); | |
1006 | if (!data) | |
9390f425 | 1007 | break; |
e0c2b380 FI |
1008 | data->ds_commit_index = i; |
1009 | data->lseg = lseg; | |
1010 | list_add(&data->pages, list); | |
9390f425 | 1011 | nreq++; |
e0c2b380 | 1012 | } |
e0c2b380 | 1013 | |
9390f425 | 1014 | /* Clean up on error */ |
e0c2b380 | 1015 | for (j = i; j < fl->number_of_buckets; j++) { |
d6d6dc7c | 1016 | if (list_empty(&fl->commit_buckets[i].committing)) |
e0c2b380 | 1017 | continue; |
d6d6dc7c | 1018 | nfs_retry_commit(&fl->commit_buckets[i].committing, lseg); |
e0c2b380 FI |
1019 | put_lseg(lseg); /* associated with emptying bucket */ |
1020 | } | |
1021 | put_lseg(lseg); | |
1022 | /* Caller will clean up entries put on list */ | |
9390f425 | 1023 | return nreq; |
e0c2b380 FI |
1024 | } |
1025 | ||
1026 | /* This follows nfs_commit_list pretty closely */ | |
1027 | static int | |
1028 | filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
1029 | int how) | |
1030 | { | |
1031 | struct nfs_write_data *data, *tmp; | |
1032 | LIST_HEAD(list); | |
9390f425 | 1033 | unsigned int nreq = 0; |
e0c2b380 FI |
1034 | |
1035 | if (!list_empty(mds_pages)) { | |
1036 | data = nfs_commitdata_alloc(); | |
9390f425 TM |
1037 | if (data != NULL) { |
1038 | data->lseg = NULL; | |
1039 | list_add(&data->pages, &list); | |
1040 | nreq++; | |
1041 | } else | |
1042 | nfs_retry_commit(mds_pages, NULL); | |
e0c2b380 FI |
1043 | } |
1044 | ||
9390f425 TM |
1045 | nreq += alloc_ds_commits(inode, &list); |
1046 | ||
1047 | if (nreq == 0) { | |
1048 | nfs_commit_clear_lock(NFS_I(inode)); | |
1049 | goto out; | |
1050 | } | |
1051 | ||
1052 | atomic_add(nreq, &NFS_I(inode)->commits_outstanding); | |
e0c2b380 FI |
1053 | |
1054 | list_for_each_entry_safe(data, tmp, &list, pages) { | |
1055 | list_del_init(&data->pages); | |
e0c2b380 FI |
1056 | if (!data->lseg) { |
1057 | nfs_init_commit(data, mds_pages, NULL); | |
1058 | nfs_initiate_commit(data, NFS_CLIENT(inode), | |
1059 | data->mds_ops, how); | |
1060 | } else { | |
d6d6dc7c | 1061 | nfs_init_commit(data, &FILELAYOUT_LSEG(data->lseg)->commit_buckets[data->ds_commit_index].committing, data->lseg); |
e0c2b380 FI |
1062 | filelayout_initiate_commit(data, how); |
1063 | } | |
1064 | } | |
9390f425 TM |
1065 | out: |
1066 | return PNFS_ATTEMPTED; | |
e0c2b380 FI |
1067 | } |
1068 | ||
1775bc34 BH |
1069 | static void |
1070 | filelayout_free_deveiceid_node(struct nfs4_deviceid_node *d) | |
1071 | { | |
1072 | nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node)); | |
1073 | } | |
1074 | ||
7ab672ce | 1075 | static struct pnfs_layoutdriver_type filelayout_type = { |
ea8eecdd CH |
1076 | .id = LAYOUT_NFSV4_1_FILES, |
1077 | .name = "LAYOUT_NFSV4_1_FILES", | |
1078 | .owner = THIS_MODULE, | |
1079 | .alloc_lseg = filelayout_alloc_lseg, | |
1080 | .free_lseg = filelayout_free_lseg, | |
1751c363 TM |
1081 | .pg_read_ops = &filelayout_pg_read_ops, |
1082 | .pg_write_ops = &filelayout_pg_write_ops, | |
8dd37758 TM |
1083 | .mark_request_commit = filelayout_mark_request_commit, |
1084 | .clear_request_commit = filelayout_clear_request_commit, | |
d6d6dc7c | 1085 | .scan_commit_lists = filelayout_scan_commit_lists, |
e0c2b380 | 1086 | .commit_pagelist = filelayout_commit_pagelist, |
dc70d7b3 | 1087 | .read_pagelist = filelayout_read_pagelist, |
0382b744 | 1088 | .write_pagelist = filelayout_write_pagelist, |
1775bc34 | 1089 | .free_deviceid_node = filelayout_free_deveiceid_node, |
7ab672ce DH |
1090 | }; |
1091 | ||
1092 | static int __init nfs4filelayout_init(void) | |
1093 | { | |
1094 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n", | |
1095 | __func__); | |
1096 | return pnfs_register_layoutdriver(&filelayout_type); | |
1097 | } | |
1098 | ||
1099 | static void __exit nfs4filelayout_exit(void) | |
1100 | { | |
1101 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n", | |
1102 | __func__); | |
1103 | pnfs_unregister_layoutdriver(&filelayout_type); | |
1104 | } | |
1105 | ||
f85ef69c BF |
1106 | MODULE_ALIAS("nfs-layouttype4-1"); |
1107 | ||
7ab672ce DH |
1108 | module_init(nfs4filelayout_init); |
1109 | module_exit(nfs4filelayout_exit); |