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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 | ||
76e697ba | 38 | #include "nfs4session.h" |
16b374ca | 39 | #include "internal.h" |
9cb81968 | 40 | #include "delegation.h" |
16b374ca | 41 | #include "nfs4filelayout.h" |
cc668ab3 | 42 | #include "nfs4trace.h" |
7ab672ce DH |
43 | |
44 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
45 | ||
46 | MODULE_LICENSE("GPL"); | |
47 | MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>"); | |
48 | MODULE_DESCRIPTION("The NFSv4 file layout driver"); | |
49 | ||
cbdabc7f AA |
50 | #define FILELAYOUT_POLL_RETRY_MAX (15*HZ) |
51 | ||
cfe7f412 FI |
52 | static loff_t |
53 | filelayout_get_dense_offset(struct nfs4_filelayout_segment *flseg, | |
54 | loff_t offset) | |
55 | { | |
56 | u32 stripe_width = flseg->stripe_unit * flseg->dsaddr->stripe_count; | |
3476f114 CM |
57 | u64 stripe_no; |
58 | u32 rem; | |
cfe7f412 FI |
59 | |
60 | offset -= flseg->pattern_offset; | |
3476f114 CM |
61 | stripe_no = div_u64(offset, stripe_width); |
62 | div_u64_rem(offset, flseg->stripe_unit, &rem); | |
cfe7f412 | 63 | |
3476f114 | 64 | return stripe_no * flseg->stripe_unit + rem; |
cfe7f412 FI |
65 | } |
66 | ||
67 | /* This function is used by the layout driver to calculate the | |
68 | * offset of the file on the dserver based on whether the | |
69 | * layout type is STRIPE_DENSE or STRIPE_SPARSE | |
70 | */ | |
71 | static loff_t | |
72 | filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset) | |
73 | { | |
74 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
75 | ||
76 | switch (flseg->stripe_type) { | |
77 | case STRIPE_SPARSE: | |
78 | return offset; | |
79 | ||
80 | case STRIPE_DENSE: | |
81 | return filelayout_get_dense_offset(flseg, offset); | |
82 | } | |
83 | ||
84 | BUG(); | |
85 | } | |
86 | ||
e7dd79af AA |
87 | static void filelayout_reset_write(struct nfs_write_data *data) |
88 | { | |
89 | struct nfs_pgio_header *hdr = data->header; | |
e7dd79af AA |
90 | struct rpc_task *task = &data->task; |
91 | ||
92 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
93 | dprintk("%s Reset task %5u for i/o through MDS " | |
1e8968c5 | 94 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
e7dd79af | 95 | data->task.tk_pid, |
497826af | 96 | hdr->inode->i_sb->s_id, |
1e8968c5 | 97 | (unsigned long long)NFS_FILEID(hdr->inode), |
e7dd79af AA |
98 | data->args.count, |
99 | (unsigned long long)data->args.offset); | |
100 | ||
101 | task->tk_status = pnfs_write_done_resend_to_mds(hdr->inode, | |
102 | &hdr->pages, | |
78f33277 BH |
103 | hdr->completion_ops, |
104 | hdr->dreq); | |
e7dd79af AA |
105 | } |
106 | } | |
107 | ||
108 | static void filelayout_reset_read(struct nfs_read_data *data) | |
109 | { | |
110 | struct nfs_pgio_header *hdr = data->header; | |
e7dd79af AA |
111 | struct rpc_task *task = &data->task; |
112 | ||
113 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
114 | dprintk("%s Reset task %5u for i/o through MDS " | |
1e8968c5 | 115 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
e7dd79af | 116 | data->task.tk_pid, |
497826af | 117 | hdr->inode->i_sb->s_id, |
1e8968c5 | 118 | (unsigned long long)NFS_FILEID(hdr->inode), |
e7dd79af AA |
119 | data->args.count, |
120 | (unsigned long long)data->args.offset); | |
121 | ||
122 | task->tk_status = pnfs_read_done_resend_to_mds(hdr->inode, | |
123 | &hdr->pages, | |
78f33277 BH |
124 | hdr->completion_ops, |
125 | hdr->dreq); | |
e7dd79af AA |
126 | } |
127 | } | |
128 | ||
d527e5c1 TM |
129 | static void filelayout_fenceme(struct inode *inode, struct pnfs_layout_hdr *lo) |
130 | { | |
131 | if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
132 | return; | |
d527e5c1 TM |
133 | pnfs_return_layout(inode); |
134 | } | |
135 | ||
cbdabc7f AA |
136 | static int filelayout_async_handle_error(struct rpc_task *task, |
137 | struct nfs4_state *state, | |
138 | struct nfs_client *clp, | |
e7dd79af | 139 | struct pnfs_layout_segment *lseg) |
cbdabc7f | 140 | { |
d527e5c1 TM |
141 | struct pnfs_layout_hdr *lo = lseg->pls_layout; |
142 | struct inode *inode = lo->plh_inode; | |
e7dd79af AA |
143 | struct nfs_server *mds_server = NFS_SERVER(inode); |
144 | struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg); | |
9cb81968 | 145 | struct nfs_client *mds_client = mds_server->nfs_client; |
671fb896 | 146 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; |
9cb81968 | 147 | |
cbdabc7f AA |
148 | if (task->tk_status >= 0) |
149 | return 0; | |
cbdabc7f AA |
150 | |
151 | switch (task->tk_status) { | |
9cb81968 AA |
152 | /* MDS state errors */ |
153 | case -NFS4ERR_DELEG_REVOKED: | |
154 | case -NFS4ERR_ADMIN_REVOKED: | |
155 | case -NFS4ERR_BAD_STATEID: | |
e7dd79af AA |
156 | if (state == NULL) |
157 | break; | |
2dc31756 | 158 | nfs_remove_bad_delegation(state->inode); |
9cb81968 | 159 | case -NFS4ERR_OPENMODE: |
e7dd79af AA |
160 | if (state == NULL) |
161 | break; | |
5d422301 TM |
162 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) |
163 | goto out_bad_stateid; | |
9cb81968 AA |
164 | goto wait_on_recovery; |
165 | case -NFS4ERR_EXPIRED: | |
5d422301 TM |
166 | if (state != NULL) { |
167 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
168 | goto out_bad_stateid; | |
169 | } | |
9cb81968 AA |
170 | nfs4_schedule_lease_recovery(mds_client); |
171 | goto wait_on_recovery; | |
172 | /* DS session errors */ | |
cbdabc7f AA |
173 | case -NFS4ERR_BADSESSION: |
174 | case -NFS4ERR_BADSLOT: | |
175 | case -NFS4ERR_BAD_HIGH_SLOT: | |
176 | case -NFS4ERR_DEADSESSION: | |
177 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
178 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
179 | case -NFS4ERR_SEQ_MISORDERED: | |
180 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
181 | "flags 0x%x\n", __func__, task->tk_status, | |
182 | clp->cl_exchange_flags); | |
9f594791 | 183 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); |
cbdabc7f AA |
184 | break; |
185 | case -NFS4ERR_DELAY: | |
186 | case -NFS4ERR_GRACE: | |
cbdabc7f AA |
187 | rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX); |
188 | break; | |
a8a4ae3a AA |
189 | case -NFS4ERR_RETRY_UNCACHED_REP: |
190 | break; | |
041245c8 AA |
191 | /* Invalidate Layout errors */ |
192 | case -NFS4ERR_PNFS_NO_LAYOUT: | |
193 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
194 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
195 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
196 | case -NFS4ERR_FHEXPIRED: | |
197 | case -NFS4ERR_WRONG_TYPE: | |
198 | dprintk("%s Invalid layout error %d\n", __func__, | |
199 | task->tk_status); | |
200 | /* | |
201 | * Destroy layout so new i/o will get a new layout. | |
202 | * Layout will not be destroyed until all current lseg | |
203 | * references are put. Mark layout as invalid to resend failed | |
204 | * i/o and all i/o waiting on the slot table to the MDS until | |
205 | * layout is destroyed and a new valid layout is obtained. | |
206 | */ | |
d42e7873 | 207 | pnfs_destroy_layout(NFS_I(inode)); |
041245c8 AA |
208 | rpc_wake_up(&tbl->slot_tbl_waitq); |
209 | goto reset; | |
e7dd79af AA |
210 | /* RPC connection errors */ |
211 | case -ECONNREFUSED: | |
212 | case -EHOSTDOWN: | |
213 | case -EHOSTUNREACH: | |
214 | case -ENETUNREACH: | |
215 | case -EIO: | |
216 | case -ETIMEDOUT: | |
217 | case -EPIPE: | |
218 | dprintk("%s DS connection error %d\n", __func__, | |
219 | task->tk_status); | |
1dfed273 | 220 | nfs4_mark_deviceid_unavailable(devid); |
d527e5c1 | 221 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); |
671fb896 | 222 | rpc_wake_up(&tbl->slot_tbl_waitq); |
e7dd79af | 223 | /* fall through */ |
cbdabc7f | 224 | default: |
041245c8 | 225 | reset: |
e7dd79af | 226 | dprintk("%s Retry through MDS. Error %d\n", __func__, |
cbdabc7f | 227 | task->tk_status); |
e7dd79af | 228 | return -NFS4ERR_RESET_TO_MDS; |
cbdabc7f | 229 | } |
9cb81968 | 230 | out: |
cbdabc7f AA |
231 | task->tk_status = 0; |
232 | return -EAGAIN; | |
5d422301 TM |
233 | out_bad_stateid: |
234 | task->tk_status = -EIO; | |
235 | return 0; | |
9cb81968 AA |
236 | wait_on_recovery: |
237 | rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); | |
238 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) | |
239 | rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); | |
240 | goto out; | |
cbdabc7f AA |
241 | } |
242 | ||
243 | /* NFS_PROTO call done callback routines */ | |
244 | ||
245 | static int filelayout_read_done_cb(struct rpc_task *task, | |
246 | struct nfs_read_data *data) | |
247 | { | |
e7dd79af AA |
248 | struct nfs_pgio_header *hdr = data->header; |
249 | int err; | |
cbdabc7f | 250 | |
cc668ab3 | 251 | trace_nfs4_pnfs_read(data, task->tk_status); |
e7dd79af AA |
252 | err = filelayout_async_handle_error(task, data->args.context->state, |
253 | data->ds_clp, hdr->lseg); | |
cbdabc7f | 254 | |
e7dd79af AA |
255 | switch (err) { |
256 | case -NFS4ERR_RESET_TO_MDS: | |
257 | filelayout_reset_read(data); | |
258 | return task->tk_status; | |
259 | case -EAGAIN: | |
d00c5d43 | 260 | rpc_restart_call_prepare(task); |
cbdabc7f AA |
261 | return -EAGAIN; |
262 | } | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
863a3c6c AA |
267 | /* |
268 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
269 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
270 | * rfc5661 is not clear about which credential should be used. | |
271 | */ | |
272 | static void | |
273 | filelayout_set_layoutcommit(struct nfs_write_data *wdata) | |
274 | { | |
cd841605 FI |
275 | struct nfs_pgio_header *hdr = wdata->header; |
276 | ||
277 | if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds || | |
863a3c6c AA |
278 | wdata->res.verf->committed == NFS_FILE_SYNC) |
279 | return; | |
280 | ||
281 | pnfs_set_layoutcommit(wdata); | |
cd841605 FI |
282 | dprintk("%s ionde %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino, |
283 | (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb); | |
863a3c6c AA |
284 | } |
285 | ||
1dfed273 TM |
286 | bool |
287 | filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node) | |
288 | { | |
289 | return filelayout_test_devid_invalid(node) || | |
290 | nfs4_test_deviceid_unavailable(node); | |
291 | } | |
292 | ||
293 | static bool | |
294 | filelayout_reset_to_mds(struct pnfs_layout_segment *lseg) | |
295 | { | |
296 | struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg); | |
297 | ||
8006bfba | 298 | return filelayout_test_devid_unavailable(node); |
1dfed273 TM |
299 | } |
300 | ||
dc70d7b3 AA |
301 | /* |
302 | * Call ops for the async read/write cases | |
303 | * In the case of dense layouts, the offset needs to be reset to its | |
304 | * original value. | |
305 | */ | |
306 | static void filelayout_read_prepare(struct rpc_task *task, void *data) | |
307 | { | |
cd12ae32 | 308 | struct nfs_read_data *rdata = data; |
dc70d7b3 | 309 | |
c58c8441 TM |
310 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &rdata->args.context->flags))) { |
311 | rpc_exit(task, -EIO); | |
312 | return; | |
313 | } | |
041245c8 | 314 | if (filelayout_reset_to_mds(rdata->header->lseg)) { |
0ad2f378 AA |
315 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
316 | filelayout_reset_read(rdata); | |
317 | rpc_exit(task, 0); | |
318 | return; | |
319 | } | |
cbdabc7f AA |
320 | rdata->read_done_cb = filelayout_read_done_cb; |
321 | ||
9b206149 | 322 | if (nfs41_setup_sequence(rdata->ds_clp->cl_session, |
d9afbd1b TM |
323 | &rdata->args.seq_args, |
324 | &rdata->res.seq_res, | |
9b206149 TM |
325 | task)) |
326 | return; | |
327 | nfs4_set_rw_stateid(&rdata->args.stateid, rdata->args.context, | |
328 | rdata->args.lock_context, FMODE_READ); | |
dc70d7b3 AA |
329 | } |
330 | ||
331 | static void filelayout_read_call_done(struct rpc_task *task, void *data) | |
332 | { | |
cd12ae32 | 333 | struct nfs_read_data *rdata = data; |
dc70d7b3 AA |
334 | |
335 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
336 | ||
bd4aeffb | 337 | if (test_bit(NFS_IOHDR_REDO, &rdata->header->flags) && |
f9c96fcc | 338 | task->tk_status == 0) { |
905e7daf | 339 | nfs41_sequence_done(task, &rdata->res.seq_res); |
0ad2f378 | 340 | return; |
f9c96fcc | 341 | } |
0ad2f378 | 342 | |
dc70d7b3 | 343 | /* Note this may cause RPC to be resent */ |
cd841605 | 344 | rdata->header->mds_ops->rpc_call_done(task, data); |
dc70d7b3 AA |
345 | } |
346 | ||
0a702195 WAA |
347 | static void filelayout_read_count_stats(struct rpc_task *task, void *data) |
348 | { | |
cd12ae32 | 349 | struct nfs_read_data *rdata = data; |
0a702195 | 350 | |
cd841605 | 351 | rpc_count_iostats(task, NFS_SERVER(rdata->header->inode)->client->cl_metrics); |
0a702195 WAA |
352 | } |
353 | ||
dc70d7b3 AA |
354 | static void filelayout_read_release(void *data) |
355 | { | |
cd12ae32 | 356 | struct nfs_read_data *rdata = data; |
d527e5c1 | 357 | struct pnfs_layout_hdr *lo = rdata->header->lseg->pls_layout; |
dc70d7b3 | 358 | |
d527e5c1 | 359 | filelayout_fenceme(lo->plh_inode, lo); |
996074cb | 360 | nfs_put_client(rdata->ds_clp); |
cd841605 | 361 | rdata->header->mds_ops->rpc_release(data); |
dc70d7b3 AA |
362 | } |
363 | ||
a69aef14 FI |
364 | static int filelayout_write_done_cb(struct rpc_task *task, |
365 | struct nfs_write_data *data) | |
366 | { | |
e7dd79af AA |
367 | struct nfs_pgio_header *hdr = data->header; |
368 | int err; | |
369 | ||
cc668ab3 | 370 | trace_nfs4_pnfs_write(data, task->tk_status); |
e7dd79af AA |
371 | err = filelayout_async_handle_error(task, data->args.context->state, |
372 | data->ds_clp, hdr->lseg); | |
373 | ||
374 | switch (err) { | |
375 | case -NFS4ERR_RESET_TO_MDS: | |
376 | filelayout_reset_write(data); | |
377 | return task->tk_status; | |
378 | case -EAGAIN: | |
d00c5d43 | 379 | rpc_restart_call_prepare(task); |
a69aef14 FI |
380 | return -EAGAIN; |
381 | } | |
382 | ||
863a3c6c | 383 | filelayout_set_layoutcommit(data); |
a69aef14 FI |
384 | return 0; |
385 | } | |
386 | ||
e0c2b380 | 387 | /* Fake up some data that will cause nfs_commit_release to retry the writes. */ |
0b7c0153 | 388 | static void prepare_to_resend_writes(struct nfs_commit_data *data) |
e0c2b380 FI |
389 | { |
390 | struct nfs_page *first = nfs_list_entry(data->pages.next); | |
391 | ||
392 | data->task.tk_status = 0; | |
2f2c63bc TM |
393 | memcpy(&data->verf.verifier, &first->wb_verf, |
394 | sizeof(data->verf.verifier)); | |
395 | data->verf.verifier.data[0]++; /* ensure verifier mismatch */ | |
e0c2b380 FI |
396 | } |
397 | ||
398 | static int filelayout_commit_done_cb(struct rpc_task *task, | |
0b7c0153 | 399 | struct nfs_commit_data *data) |
e0c2b380 | 400 | { |
e7dd79af AA |
401 | int err; |
402 | ||
cc668ab3 | 403 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); |
e7dd79af AA |
404 | err = filelayout_async_handle_error(task, NULL, data->ds_clp, |
405 | data->lseg); | |
406 | ||
407 | switch (err) { | |
408 | case -NFS4ERR_RESET_TO_MDS: | |
409 | prepare_to_resend_writes(data); | |
410 | return -EAGAIN; | |
411 | case -EAGAIN: | |
412 | rpc_restart_call_prepare(task); | |
e0c2b380 FI |
413 | return -EAGAIN; |
414 | } | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
a69aef14 FI |
419 | static void filelayout_write_prepare(struct rpc_task *task, void *data) |
420 | { | |
cd12ae32 | 421 | struct nfs_write_data *wdata = data; |
a69aef14 | 422 | |
c58c8441 TM |
423 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &wdata->args.context->flags))) { |
424 | rpc_exit(task, -EIO); | |
425 | return; | |
426 | } | |
041245c8 | 427 | if (filelayout_reset_to_mds(wdata->header->lseg)) { |
0ad2f378 AA |
428 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
429 | filelayout_reset_write(wdata); | |
430 | rpc_exit(task, 0); | |
431 | return; | |
432 | } | |
9b206149 | 433 | if (nfs41_setup_sequence(wdata->ds_clp->cl_session, |
d9afbd1b TM |
434 | &wdata->args.seq_args, |
435 | &wdata->res.seq_res, | |
9b206149 TM |
436 | task)) |
437 | return; | |
438 | nfs4_set_rw_stateid(&wdata->args.stateid, wdata->args.context, | |
439 | wdata->args.lock_context, FMODE_WRITE); | |
a69aef14 FI |
440 | } |
441 | ||
442 | static void filelayout_write_call_done(struct rpc_task *task, void *data) | |
443 | { | |
cd12ae32 | 444 | struct nfs_write_data *wdata = data; |
a69aef14 | 445 | |
bd4aeffb | 446 | if (test_bit(NFS_IOHDR_REDO, &wdata->header->flags) && |
f9c96fcc | 447 | task->tk_status == 0) { |
905e7daf | 448 | nfs41_sequence_done(task, &wdata->res.seq_res); |
0ad2f378 | 449 | return; |
f9c96fcc | 450 | } |
0ad2f378 | 451 | |
a69aef14 | 452 | /* Note this may cause RPC to be resent */ |
cd841605 | 453 | wdata->header->mds_ops->rpc_call_done(task, data); |
a69aef14 FI |
454 | } |
455 | ||
0a702195 WAA |
456 | static void filelayout_write_count_stats(struct rpc_task *task, void *data) |
457 | { | |
cd12ae32 | 458 | struct nfs_write_data *wdata = data; |
0a702195 | 459 | |
cd841605 | 460 | rpc_count_iostats(task, NFS_SERVER(wdata->header->inode)->client->cl_metrics); |
0a702195 WAA |
461 | } |
462 | ||
a69aef14 FI |
463 | static void filelayout_write_release(void *data) |
464 | { | |
cd12ae32 | 465 | struct nfs_write_data *wdata = data; |
d527e5c1 | 466 | struct pnfs_layout_hdr *lo = wdata->header->lseg->pls_layout; |
a69aef14 | 467 | |
d527e5c1 | 468 | filelayout_fenceme(lo->plh_inode, lo); |
996074cb | 469 | nfs_put_client(wdata->ds_clp); |
cd841605 | 470 | wdata->header->mds_ops->rpc_release(data); |
a69aef14 FI |
471 | } |
472 | ||
0b7c0153 | 473 | static void filelayout_commit_prepare(struct rpc_task *task, void *data) |
e0c2b380 | 474 | { |
0b7c0153 | 475 | struct nfs_commit_data *wdata = data; |
e0c2b380 | 476 | |
d9afbd1b TM |
477 | nfs41_setup_sequence(wdata->ds_clp->cl_session, |
478 | &wdata->args.seq_args, | |
479 | &wdata->res.seq_res, | |
480 | task); | |
0b7c0153 FI |
481 | } |
482 | ||
483 | static void filelayout_write_commit_done(struct rpc_task *task, void *data) | |
484 | { | |
485 | struct nfs_commit_data *wdata = data; | |
486 | ||
487 | /* Note this may cause RPC to be resent */ | |
488 | wdata->mds_ops->rpc_call_done(task, data); | |
489 | } | |
490 | ||
491 | static void filelayout_commit_count_stats(struct rpc_task *task, void *data) | |
492 | { | |
493 | struct nfs_commit_data *cdata = data; | |
494 | ||
495 | rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics); | |
496 | } | |
497 | ||
498 | static void filelayout_commit_release(void *calldata) | |
499 | { | |
500 | struct nfs_commit_data *data = calldata; | |
501 | ||
f453a54a | 502 | data->completion_ops->completion(data); |
9369a431 | 503 | pnfs_put_lseg(data->lseg); |
3a7936c3 | 504 | nfs_put_client(data->ds_clp); |
0b7c0153 | 505 | nfs_commitdata_release(data); |
e0c2b380 FI |
506 | } |
507 | ||
17280175 | 508 | static const struct rpc_call_ops filelayout_read_call_ops = { |
dc70d7b3 AA |
509 | .rpc_call_prepare = filelayout_read_prepare, |
510 | .rpc_call_done = filelayout_read_call_done, | |
0a702195 | 511 | .rpc_count_stats = filelayout_read_count_stats, |
dc70d7b3 AA |
512 | .rpc_release = filelayout_read_release, |
513 | }; | |
514 | ||
17280175 | 515 | static const struct rpc_call_ops filelayout_write_call_ops = { |
a69aef14 FI |
516 | .rpc_call_prepare = filelayout_write_prepare, |
517 | .rpc_call_done = filelayout_write_call_done, | |
0a702195 | 518 | .rpc_count_stats = filelayout_write_count_stats, |
a69aef14 FI |
519 | .rpc_release = filelayout_write_release, |
520 | }; | |
521 | ||
17280175 | 522 | static const struct rpc_call_ops filelayout_commit_call_ops = { |
0b7c0153 FI |
523 | .rpc_call_prepare = filelayout_commit_prepare, |
524 | .rpc_call_done = filelayout_write_commit_done, | |
525 | .rpc_count_stats = filelayout_commit_count_stats, | |
e0c2b380 FI |
526 | .rpc_release = filelayout_commit_release, |
527 | }; | |
528 | ||
dc70d7b3 AA |
529 | static enum pnfs_try_status |
530 | filelayout_read_pagelist(struct nfs_read_data *data) | |
531 | { | |
cd841605 FI |
532 | struct nfs_pgio_header *hdr = data->header; |
533 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
dc70d7b3 | 534 | struct nfs4_pnfs_ds *ds; |
0e20162e | 535 | struct rpc_clnt *ds_clnt; |
dc70d7b3 AA |
536 | loff_t offset = data->args.offset; |
537 | u32 j, idx; | |
538 | struct nfs_fh *fh; | |
dc70d7b3 AA |
539 | |
540 | dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", | |
cd841605 | 541 | __func__, hdr->inode->i_ino, |
dc70d7b3 AA |
542 | data->args.pgbase, (size_t)data->args.count, offset); |
543 | ||
544 | /* Retrieve the correct rpc_client for the byte range */ | |
545 | j = nfs4_fl_calc_j_index(lseg, offset); | |
546 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
547 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 548 | if (!ds) |
dc70d7b3 | 549 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
550 | |
551 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
552 | if (IS_ERR(ds_clnt)) | |
553 | return PNFS_NOT_ATTEMPTED; | |
554 | ||
3a7936c3 AA |
555 | dprintk("%s USE DS: %s cl_count %d\n", __func__, |
556 | ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); | |
dc70d7b3 AA |
557 | |
558 | /* No multipath support. Use first DS */ | |
3a7936c3 | 559 | atomic_inc(&ds->ds_clp->cl_count); |
dc70d7b3 AA |
560 | data->ds_clp = ds->ds_clp; |
561 | fh = nfs4_fl_select_ds_fh(lseg, j); | |
562 | if (fh) | |
563 | data->args.fh = fh; | |
564 | ||
565 | data->args.offset = filelayout_get_dserver_offset(lseg, offset); | |
566 | data->mds_offset = offset; | |
567 | ||
568 | /* Perform an asynchronous read to ds */ | |
0e20162e | 569 | nfs_initiate_read(ds_clnt, data, |
9f0ec176 | 570 | &filelayout_read_call_ops, RPC_TASK_SOFTCONN); |
dc70d7b3 AA |
571 | return PNFS_ATTEMPTED; |
572 | } | |
573 | ||
a69aef14 | 574 | /* Perform async writes. */ |
0382b744 AA |
575 | static enum pnfs_try_status |
576 | filelayout_write_pagelist(struct nfs_write_data *data, int sync) | |
577 | { | |
cd841605 FI |
578 | struct nfs_pgio_header *hdr = data->header; |
579 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
a69aef14 | 580 | struct nfs4_pnfs_ds *ds; |
0e20162e | 581 | struct rpc_clnt *ds_clnt; |
a69aef14 FI |
582 | loff_t offset = data->args.offset; |
583 | u32 j, idx; | |
584 | struct nfs_fh *fh; | |
a69aef14 FI |
585 | |
586 | /* Retrieve the correct rpc_client for the byte range */ | |
587 | j = nfs4_fl_calc_j_index(lseg, offset); | |
588 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
589 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 590 | if (!ds) |
a69aef14 | 591 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
592 | |
593 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
594 | if (IS_ERR(ds_clnt)) | |
595 | return PNFS_NOT_ATTEMPTED; | |
596 | ||
3a7936c3 AA |
597 | dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d\n", |
598 | __func__, hdr->inode->i_ino, sync, (size_t) data->args.count, | |
599 | offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); | |
a69aef14 | 600 | |
a69aef14 | 601 | data->write_done_cb = filelayout_write_done_cb; |
3a7936c3 | 602 | atomic_inc(&ds->ds_clp->cl_count); |
a69aef14 FI |
603 | data->ds_clp = ds->ds_clp; |
604 | fh = nfs4_fl_select_ds_fh(lseg, j); | |
605 | if (fh) | |
606 | data->args.fh = fh; | |
607 | /* | |
608 | * Get the file offset on the dserver. Set the write offset to | |
609 | * this offset and save the original offset. | |
610 | */ | |
611 | data->args.offset = filelayout_get_dserver_offset(lseg, offset); | |
a69aef14 FI |
612 | |
613 | /* Perform an asynchronous write */ | |
0e20162e | 614 | nfs_initiate_write(ds_clnt, data, |
9f0ec176 AA |
615 | &filelayout_write_call_ops, sync, |
616 | RPC_TASK_SOFTCONN); | |
a69aef14 | 617 | return PNFS_ATTEMPTED; |
0382b744 AA |
618 | } |
619 | ||
16b374ca AA |
620 | /* |
621 | * filelayout_check_layout() | |
622 | * | |
623 | * Make sure layout segment parameters are sane WRT the device. | |
624 | * At this point no generic layer initialization of the lseg has occurred, | |
625 | * and nothing has been added to the layout_hdr cache. | |
626 | * | |
627 | */ | |
628 | static int | |
629 | filelayout_check_layout(struct pnfs_layout_hdr *lo, | |
630 | struct nfs4_filelayout_segment *fl, | |
631 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
632 | struct nfs4_deviceid *id, |
633 | gfp_t gfp_flags) | |
16b374ca | 634 | { |
a1eaecbc | 635 | struct nfs4_deviceid_node *d; |
16b374ca AA |
636 | struct nfs4_file_layout_dsaddr *dsaddr; |
637 | int status = -EINVAL; | |
b7edfaa1 | 638 | struct nfs_server *nfss = NFS_SERVER(lo->plh_inode); |
16b374ca AA |
639 | |
640 | dprintk("--> %s\n", __func__); | |
641 | ||
7c24d948 AA |
642 | /* FIXME: remove this check when layout segment support is added */ |
643 | if (lgr->range.offset != 0 || | |
644 | lgr->range.length != NFS4_MAX_UINT64) { | |
645 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
646 | __func__); | |
647 | goto out; | |
648 | } | |
649 | ||
16b374ca | 650 | if (fl->pattern_offset > lgr->range.offset) { |
3b6445a6 | 651 | dprintk("%s pattern_offset %lld too large\n", |
16b374ca AA |
652 | __func__, fl->pattern_offset); |
653 | goto out; | |
654 | } | |
655 | ||
75247aff BH |
656 | if (!fl->stripe_unit || fl->stripe_unit % PAGE_SIZE) { |
657 | dprintk("%s Invalid stripe unit (%u)\n", | |
16b374ca AA |
658 | __func__, fl->stripe_unit); |
659 | goto out; | |
660 | } | |
661 | ||
662 | /* find and reference the deviceid */ | |
35c8bb54 BH |
663 | d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode)->pnfs_curr_ld, |
664 | NFS_SERVER(lo->plh_inode)->nfs_client, id); | |
a1eaecbc | 665 | if (d == NULL) { |
cd5875fe TM |
666 | dsaddr = filelayout_get_device_info(lo->plh_inode, id, |
667 | lo->plh_lc_cred, gfp_flags); | |
16b374ca AA |
668 | if (dsaddr == NULL) |
669 | goto out; | |
a1eaecbc BH |
670 | } else |
671 | dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node); | |
1dfed273 TM |
672 | /* Found deviceid is unavailable */ |
673 | if (filelayout_test_devid_unavailable(&dsaddr->id_node)) | |
c47abcf8 AA |
674 | goto out_put; |
675 | ||
16b374ca AA |
676 | fl->dsaddr = dsaddr; |
677 | ||
e414966b CL |
678 | if (fl->first_stripe_index >= dsaddr->stripe_count) { |
679 | dprintk("%s Bad first_stripe_index %u\n", | |
16b374ca AA |
680 | __func__, fl->first_stripe_index); |
681 | goto out_put; | |
682 | } | |
683 | ||
684 | if ((fl->stripe_type == STRIPE_SPARSE && | |
685 | fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) || | |
686 | (fl->stripe_type == STRIPE_DENSE && | |
687 | fl->num_fh != dsaddr->stripe_count)) { | |
688 | dprintk("%s num_fh %u not valid for given packing\n", | |
689 | __func__, fl->num_fh); | |
690 | goto out_put; | |
691 | } | |
692 | ||
693 | if (fl->stripe_unit % nfss->rsize || fl->stripe_unit % nfss->wsize) { | |
694 | dprintk("%s Stripe unit (%u) not aligned with rsize %u " | |
695 | "wsize %u\n", __func__, fl->stripe_unit, nfss->rsize, | |
696 | nfss->wsize); | |
697 | } | |
698 | ||
699 | status = 0; | |
700 | out: | |
701 | dprintk("--> %s returns %d\n", __func__, status); | |
702 | return status; | |
703 | out_put: | |
ea8eecdd | 704 | nfs4_fl_put_deviceid(dsaddr); |
16b374ca AA |
705 | goto out; |
706 | } | |
707 | ||
708 | static void filelayout_free_fh_array(struct nfs4_filelayout_segment *fl) | |
709 | { | |
710 | int i; | |
711 | ||
712 | for (i = 0; i < fl->num_fh; i++) { | |
713 | if (!fl->fh_array[i]) | |
714 | break; | |
715 | kfree(fl->fh_array[i]); | |
716 | } | |
717 | kfree(fl->fh_array); | |
718 | fl->fh_array = NULL; | |
719 | } | |
720 | ||
721 | static void | |
722 | _filelayout_free_lseg(struct nfs4_filelayout_segment *fl) | |
723 | { | |
724 | filelayout_free_fh_array(fl); | |
725 | kfree(fl); | |
726 | } | |
727 | ||
728 | static int | |
729 | filelayout_decode_layout(struct pnfs_layout_hdr *flo, | |
730 | struct nfs4_filelayout_segment *fl, | |
731 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
732 | struct nfs4_deviceid *id, |
733 | gfp_t gfp_flags) | |
16b374ca | 734 | { |
35124a09 | 735 | struct xdr_stream stream; |
f7da7a12 | 736 | struct xdr_buf buf; |
35124a09 WAA |
737 | struct page *scratch; |
738 | __be32 *p; | |
16b374ca AA |
739 | uint32_t nfl_util; |
740 | int i; | |
741 | ||
742 | dprintk("%s: set_layout_map Begin\n", __func__); | |
743 | ||
a75b9df9 | 744 | scratch = alloc_page(gfp_flags); |
35124a09 WAA |
745 | if (!scratch) |
746 | return -ENOMEM; | |
747 | ||
f7da7a12 | 748 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); |
35124a09 WAA |
749 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); |
750 | ||
751 | /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8), | |
752 | * num_fh (4) */ | |
753 | p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20); | |
754 | if (unlikely(!p)) | |
755 | goto out_err; | |
756 | ||
16b374ca AA |
757 | memcpy(id, p, sizeof(*id)); |
758 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
a1eaecbc | 759 | nfs4_print_deviceid(id); |
16b374ca AA |
760 | |
761 | nfl_util = be32_to_cpup(p++); | |
762 | if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS) | |
763 | fl->commit_through_mds = 1; | |
764 | if (nfl_util & NFL4_UFLG_DENSE) | |
765 | fl->stripe_type = STRIPE_DENSE; | |
766 | else | |
767 | fl->stripe_type = STRIPE_SPARSE; | |
768 | fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK; | |
769 | ||
770 | fl->first_stripe_index = be32_to_cpup(p++); | |
771 | p = xdr_decode_hyper(p, &fl->pattern_offset); | |
772 | fl->num_fh = be32_to_cpup(p++); | |
773 | ||
774 | dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n", | |
775 | __func__, nfl_util, fl->num_fh, fl->first_stripe_index, | |
776 | fl->pattern_offset); | |
777 | ||
cec765cf AA |
778 | /* Note that a zero value for num_fh is legal for STRIPE_SPARSE. |
779 | * Futher checking is done in filelayout_check_layout */ | |
e414966b | 780 | if (fl->num_fh > |
cec765cf | 781 | max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT)) |
35124a09 WAA |
782 | goto out_err; |
783 | ||
cec765cf | 784 | if (fl->num_fh > 0) { |
1813badd | 785 | fl->fh_array = kcalloc(fl->num_fh, sizeof(fl->fh_array[0]), |
cec765cf AA |
786 | gfp_flags); |
787 | if (!fl->fh_array) | |
788 | goto out_err; | |
789 | } | |
16b374ca AA |
790 | |
791 | for (i = 0; i < fl->num_fh; i++) { | |
792 | /* Do we want to use a mempool here? */ | |
a75b9df9 | 793 | fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags); |
35124a09 WAA |
794 | if (!fl->fh_array[i]) |
795 | goto out_err_free; | |
796 | ||
797 | p = xdr_inline_decode(&stream, 4); | |
798 | if (unlikely(!p)) | |
799 | goto out_err_free; | |
16b374ca AA |
800 | fl->fh_array[i]->size = be32_to_cpup(p++); |
801 | if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) { | |
f9fd2d9c | 802 | printk(KERN_ERR "NFS: Too big fh %d received %d\n", |
16b374ca | 803 | i, fl->fh_array[i]->size); |
35124a09 | 804 | goto out_err_free; |
16b374ca | 805 | } |
35124a09 WAA |
806 | |
807 | p = xdr_inline_decode(&stream, fl->fh_array[i]->size); | |
808 | if (unlikely(!p)) | |
809 | goto out_err_free; | |
16b374ca | 810 | memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size); |
16b374ca AA |
811 | dprintk("DEBUG: %s: fh len %d\n", __func__, |
812 | fl->fh_array[i]->size); | |
813 | } | |
814 | ||
35124a09 | 815 | __free_page(scratch); |
16b374ca | 816 | return 0; |
35124a09 WAA |
817 | |
818 | out_err_free: | |
819 | filelayout_free_fh_array(fl); | |
820 | out_err: | |
821 | __free_page(scratch); | |
822 | return -EIO; | |
16b374ca AA |
823 | } |
824 | ||
c879513e FI |
825 | static void |
826 | filelayout_free_lseg(struct pnfs_layout_segment *lseg) | |
827 | { | |
828 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
829 | ||
830 | dprintk("--> %s\n", __func__); | |
831 | nfs4_fl_put_deviceid(fl->dsaddr); | |
799ba8d5 FI |
832 | /* This assumes a single RW lseg */ |
833 | if (lseg->pls_range.iomode == IOMODE_RW) { | |
834 | struct nfs4_filelayout *flo; | |
835 | ||
836 | flo = FILELAYOUT_FROM_HDR(lseg->pls_layout); | |
837 | flo->commit_info.nbuckets = 0; | |
838 | kfree(flo->commit_info.buckets); | |
839 | flo->commit_info.buckets = NULL; | |
840 | } | |
c879513e FI |
841 | _filelayout_free_lseg(fl); |
842 | } | |
843 | ||
799ba8d5 FI |
844 | static int |
845 | filelayout_alloc_commit_info(struct pnfs_layout_segment *lseg, | |
ea2cf228 | 846 | struct nfs_commit_info *cinfo, |
799ba8d5 FI |
847 | gfp_t gfp_flags) |
848 | { | |
849 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
ea2cf228 | 850 | struct pnfs_commit_bucket *buckets; |
799ba8d5 FI |
851 | int size; |
852 | ||
853 | if (fl->commit_through_mds) | |
854 | return 0; | |
ea2cf228 | 855 | if (cinfo->ds->nbuckets != 0) { |
799ba8d5 FI |
856 | /* This assumes there is only one IOMODE_RW lseg. What |
857 | * we really want to do is have a layout_hdr level | |
858 | * dictionary of <multipath_list4, fh> keys, each | |
859 | * associated with a struct list_head, populated by calls | |
860 | * to filelayout_write_pagelist(). | |
861 | * */ | |
862 | return 0; | |
863 | } | |
864 | ||
865 | size = (fl->stripe_type == STRIPE_SPARSE) ? | |
866 | fl->dsaddr->ds_num : fl->dsaddr->stripe_count; | |
867 | ||
ea2cf228 | 868 | buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), |
799ba8d5 FI |
869 | gfp_flags); |
870 | if (!buckets) | |
871 | return -ENOMEM; | |
872 | else { | |
873 | int i; | |
874 | ||
ea2cf228 FI |
875 | spin_lock(cinfo->lock); |
876 | if (cinfo->ds->nbuckets != 0) | |
799ba8d5 FI |
877 | kfree(buckets); |
878 | else { | |
ea2cf228 FI |
879 | cinfo->ds->buckets = buckets; |
880 | cinfo->ds->nbuckets = size; | |
799ba8d5 FI |
881 | for (i = 0; i < size; i++) { |
882 | INIT_LIST_HEAD(&buckets[i].written); | |
883 | INIT_LIST_HEAD(&buckets[i].committing); | |
884 | } | |
885 | } | |
ea2cf228 | 886 | spin_unlock(cinfo->lock); |
799ba8d5 FI |
887 | return 0; |
888 | } | |
889 | } | |
890 | ||
16b374ca AA |
891 | static struct pnfs_layout_segment * |
892 | filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, | |
a75b9df9 TM |
893 | struct nfs4_layoutget_res *lgr, |
894 | gfp_t gfp_flags) | |
16b374ca AA |
895 | { |
896 | struct nfs4_filelayout_segment *fl; | |
897 | int rc; | |
898 | struct nfs4_deviceid id; | |
899 | ||
900 | dprintk("--> %s\n", __func__); | |
a75b9df9 | 901 | fl = kzalloc(sizeof(*fl), gfp_flags); |
16b374ca AA |
902 | if (!fl) |
903 | return NULL; | |
904 | ||
a75b9df9 TM |
905 | rc = filelayout_decode_layout(layoutid, fl, lgr, &id, gfp_flags); |
906 | if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id, gfp_flags)) { | |
16b374ca AA |
907 | _filelayout_free_lseg(fl); |
908 | return NULL; | |
909 | } | |
910 | return &fl->generic_hdr; | |
911 | } | |
912 | ||
94ad1c80 FI |
913 | /* |
914 | * filelayout_pg_test(). Called by nfs_can_coalesce_requests() | |
915 | * | |
18ad0a9f BH |
916 | * return true : coalesce page |
917 | * return false : don't coalesce page | |
94ad1c80 | 918 | */ |
1751c363 | 919 | static bool |
94ad1c80 FI |
920 | filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
921 | struct nfs_page *req) | |
922 | { | |
923 | u64 p_stripe, r_stripe; | |
924 | u32 stripe_unit; | |
925 | ||
19345cb2 BH |
926 | if (!pnfs_generic_pg_test(pgio, prev, req) || |
927 | !nfs_generic_pg_test(pgio, prev, req)) | |
928 | return false; | |
89a58e32 | 929 | |
b5542849 FI |
930 | p_stripe = (u64)req_offset(prev); |
931 | r_stripe = (u64)req_offset(req); | |
94ad1c80 FI |
932 | stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit; |
933 | ||
934 | do_div(p_stripe, stripe_unit); | |
935 | do_div(r_stripe, stripe_unit); | |
936 | ||
937 | return (p_stripe == r_stripe); | |
938 | } | |
939 | ||
17280175 | 940 | static void |
7c24d948 AA |
941 | filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, |
942 | struct nfs_page *req) | |
943 | { | |
bc5a89b3 | 944 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
7c24d948 | 945 | |
1825a0d0 FI |
946 | if (req->wb_offset != req->wb_pgbase) { |
947 | /* | |
948 | * Handling unaligned pages is difficult, because have to | |
949 | * somehow split a req in two in certain cases in the | |
950 | * pg.test code. Avoid this by just not using pnfs | |
951 | * in this case. | |
952 | */ | |
953 | nfs_pageio_reset_read_mds(pgio); | |
954 | return; | |
955 | } | |
7c24d948 AA |
956 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
957 | req->wb_context, | |
958 | 0, | |
959 | NFS4_MAX_UINT64, | |
960 | IOMODE_READ, | |
961 | GFP_KERNEL); | |
962 | /* If no lseg, fall back to read through mds */ | |
963 | if (pgio->pg_lseg == NULL) | |
1f945357 | 964 | nfs_pageio_reset_read_mds(pgio); |
7c24d948 AA |
965 | } |
966 | ||
17280175 | 967 | static void |
7c24d948 AA |
968 | filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, |
969 | struct nfs_page *req) | |
970 | { | |
ea2cf228 | 971 | struct nfs_commit_info cinfo; |
799ba8d5 FI |
972 | int status; |
973 | ||
bc5a89b3 | 974 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
7c24d948 | 975 | |
1825a0d0 FI |
976 | if (req->wb_offset != req->wb_pgbase) |
977 | goto out_mds; | |
7c24d948 AA |
978 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
979 | req->wb_context, | |
980 | 0, | |
981 | NFS4_MAX_UINT64, | |
982 | IOMODE_RW, | |
983 | GFP_NOFS); | |
984 | /* If no lseg, fall back to write through mds */ | |
985 | if (pgio->pg_lseg == NULL) | |
799ba8d5 | 986 | goto out_mds; |
ea2cf228 FI |
987 | nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); |
988 | status = filelayout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); | |
799ba8d5 | 989 | if (status < 0) { |
9369a431 | 990 | pnfs_put_lseg(pgio->pg_lseg); |
799ba8d5 FI |
991 | pgio->pg_lseg = NULL; |
992 | goto out_mds; | |
993 | } | |
994 | return; | |
995 | out_mds: | |
996 | nfs_pageio_reset_write_mds(pgio); | |
7c24d948 AA |
997 | } |
998 | ||
1751c363 | 999 | static const struct nfs_pageio_ops filelayout_pg_read_ops = { |
7c24d948 | 1000 | .pg_init = filelayout_pg_init_read, |
1751c363 | 1001 | .pg_test = filelayout_pg_test, |
493292dd | 1002 | .pg_doio = pnfs_generic_pg_readpages, |
1751c363 TM |
1003 | }; |
1004 | ||
1005 | static const struct nfs_pageio_ops filelayout_pg_write_ops = { | |
7c24d948 | 1006 | .pg_init = filelayout_pg_init_write, |
1751c363 | 1007 | .pg_test = filelayout_pg_test, |
dce81290 | 1008 | .pg_doio = pnfs_generic_pg_writepages, |
1751c363 TM |
1009 | }; |
1010 | ||
e0c2b380 FI |
1011 | static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j) |
1012 | { | |
1013 | if (fl->stripe_type == STRIPE_SPARSE) | |
1014 | return nfs4_fl_calc_ds_index(&fl->generic_hdr, j); | |
1015 | else | |
1016 | return j; | |
1017 | } | |
1018 | ||
d6d6dc7c FI |
1019 | /* The generic layer is about to remove the req from the commit list. |
1020 | * If this will make the bucket empty, it will need to put the lseg reference. | |
d6d6dc7c | 1021 | */ |
8dd37758 | 1022 | static void |
ea2cf228 FI |
1023 | filelayout_clear_request_commit(struct nfs_page *req, |
1024 | struct nfs_commit_info *cinfo) | |
d6d6dc7c | 1025 | { |
8dd37758 | 1026 | struct pnfs_layout_segment *freeme = NULL; |
8dd37758 | 1027 | |
ea2cf228 | 1028 | spin_lock(cinfo->lock); |
8dd37758 TM |
1029 | if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags)) |
1030 | goto out; | |
ea2cf228 | 1031 | cinfo->ds->nwritten--; |
d6d6dc7c | 1032 | if (list_is_singular(&req->wb_list)) { |
ea2cf228 | 1033 | struct pnfs_commit_bucket *bucket; |
d6d6dc7c | 1034 | |
799ba8d5 | 1035 | bucket = list_first_entry(&req->wb_list, |
ea2cf228 | 1036 | struct pnfs_commit_bucket, |
799ba8d5 FI |
1037 | written); |
1038 | freeme = bucket->wlseg; | |
1039 | bucket->wlseg = NULL; | |
d6d6dc7c | 1040 | } |
8dd37758 | 1041 | out: |
ea2cf228 FI |
1042 | nfs_request_remove_commit_list(req, cinfo); |
1043 | spin_unlock(cinfo->lock); | |
9369a431 | 1044 | pnfs_put_lseg(freeme); |
d6d6dc7c FI |
1045 | } |
1046 | ||
1047 | static struct list_head * | |
1048 | filelayout_choose_commit_list(struct nfs_page *req, | |
ea2cf228 FI |
1049 | struct pnfs_layout_segment *lseg, |
1050 | struct nfs_commit_info *cinfo) | |
e0c2b380 | 1051 | { |
e0c2b380 FI |
1052 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); |
1053 | u32 i, j; | |
1054 | struct list_head *list; | |
ea2cf228 | 1055 | struct pnfs_commit_bucket *buckets; |
e0c2b380 | 1056 | |
d6d6dc7c | 1057 | if (fl->commit_through_mds) |
ea2cf228 | 1058 | return &cinfo->mds->list; |
d6d6dc7c | 1059 | |
e0c2b380 FI |
1060 | /* Note that we are calling nfs4_fl_calc_j_index on each page |
1061 | * that ends up being committed to a data server. An attractive | |
1062 | * alternative is to add a field to nfs_write_data and nfs_page | |
1063 | * to store the value calculated in filelayout_write_pagelist | |
1064 | * and just use that here. | |
1065 | */ | |
b5542849 | 1066 | j = nfs4_fl_calc_j_index(lseg, req_offset(req)); |
e0c2b380 | 1067 | i = select_bucket_index(fl, j); |
ea2cf228 | 1068 | buckets = cinfo->ds->buckets; |
799ba8d5 | 1069 | list = &buckets[i].written; |
e0c2b380 | 1070 | if (list_empty(list)) { |
d6d6dc7c FI |
1071 | /* Non-empty buckets hold a reference on the lseg. That ref |
1072 | * is normally transferred to the COMMIT call and released | |
1073 | * there. It could also be released if the last req is pulled | |
1074 | * off due to a rewrite, in which case it will be done in | |
799ba8d5 | 1075 | * filelayout_clear_request_commit |
d6d6dc7c | 1076 | */ |
9369a431 | 1077 | buckets[i].wlseg = pnfs_get_lseg(lseg); |
e0c2b380 | 1078 | } |
8dd37758 | 1079 | set_bit(PG_COMMIT_TO_DS, &req->wb_flags); |
ea2cf228 | 1080 | cinfo->ds->nwritten++; |
e0c2b380 FI |
1081 | return list; |
1082 | } | |
1083 | ||
8dd37758 TM |
1084 | static void |
1085 | filelayout_mark_request_commit(struct nfs_page *req, | |
ea2cf228 FI |
1086 | struct pnfs_layout_segment *lseg, |
1087 | struct nfs_commit_info *cinfo) | |
8dd37758 TM |
1088 | { |
1089 | struct list_head *list; | |
1090 | ||
ea2cf228 FI |
1091 | list = filelayout_choose_commit_list(req, lseg, cinfo); |
1092 | nfs_request_add_commit_list(req, list, cinfo); | |
8dd37758 TM |
1093 | } |
1094 | ||
e0c2b380 FI |
1095 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
1096 | { | |
1097 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
1098 | ||
1099 | if (flseg->stripe_type == STRIPE_SPARSE) | |
1100 | return i; | |
1101 | else | |
1102 | return nfs4_fl_calc_ds_index(lseg, i); | |
1103 | } | |
1104 | ||
1105 | static struct nfs_fh * | |
1106 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
1107 | { | |
1108 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
1109 | ||
1110 | if (flseg->stripe_type == STRIPE_SPARSE) { | |
1111 | if (flseg->num_fh == 1) | |
1112 | i = 0; | |
1113 | else if (flseg->num_fh == 0) | |
1114 | /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ | |
1115 | return NULL; | |
1116 | } | |
1117 | return flseg->fh_array[i]; | |
1118 | } | |
1119 | ||
0b7c0153 | 1120 | static int filelayout_initiate_commit(struct nfs_commit_data *data, int how) |
e0c2b380 FI |
1121 | { |
1122 | struct pnfs_layout_segment *lseg = data->lseg; | |
1123 | struct nfs4_pnfs_ds *ds; | |
0e20162e | 1124 | struct rpc_clnt *ds_clnt; |
e0c2b380 FI |
1125 | u32 idx; |
1126 | struct nfs_fh *fh; | |
1127 | ||
1128 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
1129 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
0e20162e AA |
1130 | if (!ds) |
1131 | goto out_err; | |
1132 | ||
1133 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, data->inode); | |
1134 | if (IS_ERR(ds_clnt)) | |
1135 | goto out_err; | |
1136 | ||
3a7936c3 AA |
1137 | dprintk("%s ino %lu, how %d cl_count %d\n", __func__, |
1138 | data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count)); | |
0b7c0153 | 1139 | data->commit_done_cb = filelayout_commit_done_cb; |
3a7936c3 | 1140 | atomic_inc(&ds->ds_clp->cl_count); |
e0c2b380 FI |
1141 | data->ds_clp = ds->ds_clp; |
1142 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1143 | if (fh) | |
1144 | data->args.fh = fh; | |
0e20162e | 1145 | return nfs_initiate_commit(ds_clnt, data, |
9f0ec176 AA |
1146 | &filelayout_commit_call_ops, how, |
1147 | RPC_TASK_SOFTCONN); | |
0e20162e AA |
1148 | out_err: |
1149 | prepare_to_resend_writes(data); | |
1150 | filelayout_commit_release(data); | |
1151 | return -EAGAIN; | |
e0c2b380 FI |
1152 | } |
1153 | ||
8dd37758 | 1154 | static int |
1763da12 FI |
1155 | transfer_commit_list(struct list_head *src, struct list_head *dst, |
1156 | struct nfs_commit_info *cinfo, int max) | |
8dd37758 | 1157 | { |
8dd37758 TM |
1158 | struct nfs_page *req, *tmp; |
1159 | int ret = 0; | |
1160 | ||
1161 | list_for_each_entry_safe(req, tmp, src, wb_list) { | |
1162 | if (!nfs_lock_request(req)) | |
1163 | continue; | |
53b8ee34 | 1164 | kref_get(&req->wb_kref); |
ea2cf228 | 1165 | if (cond_resched_lock(cinfo->lock)) |
3b3be88d | 1166 | list_safe_reset_next(req, tmp, wb_list); |
ea2cf228 | 1167 | nfs_request_remove_commit_list(req, cinfo); |
8dd37758 TM |
1168 | clear_bit(PG_COMMIT_TO_DS, &req->wb_flags); |
1169 | nfs_list_add_request(req, dst); | |
1170 | ret++; | |
1763da12 | 1171 | if ((ret == max) && !cinfo->dreq) |
8dd37758 TM |
1172 | break; |
1173 | } | |
1763da12 FI |
1174 | return ret; |
1175 | } | |
1176 | ||
1177 | static int | |
1178 | filelayout_scan_ds_commit_list(struct pnfs_commit_bucket *bucket, | |
1179 | struct nfs_commit_info *cinfo, | |
1180 | int max) | |
1181 | { | |
1182 | struct list_head *src = &bucket->written; | |
1183 | struct list_head *dst = &bucket->committing; | |
1184 | int ret; | |
1185 | ||
1186 | ret = transfer_commit_list(src, dst, cinfo, max); | |
799ba8d5 | 1187 | if (ret) { |
ea2cf228 FI |
1188 | cinfo->ds->nwritten -= ret; |
1189 | cinfo->ds->ncommitting += ret; | |
799ba8d5 FI |
1190 | bucket->clseg = bucket->wlseg; |
1191 | if (list_empty(src)) | |
1192 | bucket->wlseg = NULL; | |
1193 | else | |
9369a431 | 1194 | pnfs_get_lseg(bucket->clseg); |
799ba8d5 | 1195 | } |
8dd37758 TM |
1196 | return ret; |
1197 | } | |
1198 | ||
d6d6dc7c | 1199 | /* Move reqs from written to committing lists, returning count of number moved. |
ea2cf228 | 1200 | * Note called with cinfo->lock held. |
d6d6dc7c | 1201 | */ |
ea2cf228 FI |
1202 | static int filelayout_scan_commit_lists(struct nfs_commit_info *cinfo, |
1203 | int max) | |
d6d6dc7c | 1204 | { |
d6d6dc7c FI |
1205 | int i, rv = 0, cnt; |
1206 | ||
ea2cf228 FI |
1207 | for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) { |
1208 | cnt = filelayout_scan_ds_commit_list(&cinfo->ds->buckets[i], | |
1209 | cinfo, max); | |
d6d6dc7c FI |
1210 | max -= cnt; |
1211 | rv += cnt; | |
1212 | } | |
d6d6dc7c FI |
1213 | return rv; |
1214 | } | |
1215 | ||
1763da12 FI |
1216 | /* Pull everything off the committing lists and dump into @dst */ |
1217 | static void filelayout_recover_commit_reqs(struct list_head *dst, | |
1218 | struct nfs_commit_info *cinfo) | |
1219 | { | |
1220 | struct pnfs_commit_bucket *b; | |
1221 | int i; | |
1222 | ||
471252cd | 1223 | spin_lock(cinfo->lock); |
1763da12 FI |
1224 | for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) { |
1225 | if (transfer_commit_list(&b->written, dst, cinfo, 0)) { | |
471252cd | 1226 | spin_unlock(cinfo->lock); |
9369a431 | 1227 | pnfs_put_lseg(b->wlseg); |
1763da12 | 1228 | b->wlseg = NULL; |
471252cd | 1229 | spin_lock(cinfo->lock); |
1763da12 FI |
1230 | } |
1231 | } | |
1232 | cinfo->ds->nwritten = 0; | |
471252cd | 1233 | spin_unlock(cinfo->lock); |
1763da12 FI |
1234 | } |
1235 | ||
9390f425 | 1236 | static unsigned int |
ea2cf228 | 1237 | alloc_ds_commits(struct nfs_commit_info *cinfo, struct list_head *list) |
e0c2b380 | 1238 | { |
ea2cf228 FI |
1239 | struct pnfs_ds_commit_info *fl_cinfo; |
1240 | struct pnfs_commit_bucket *bucket; | |
0b7c0153 | 1241 | struct nfs_commit_data *data; |
e0c2b380 | 1242 | int i, j; |
9390f425 | 1243 | unsigned int nreq = 0; |
e0c2b380 | 1244 | |
ea2cf228 | 1245 | fl_cinfo = cinfo->ds; |
799ba8d5 FI |
1246 | bucket = fl_cinfo->buckets; |
1247 | for (i = 0; i < fl_cinfo->nbuckets; i++, bucket++) { | |
1248 | if (list_empty(&bucket->committing)) | |
e0c2b380 FI |
1249 | continue; |
1250 | data = nfs_commitdata_alloc(); | |
1251 | if (!data) | |
9390f425 | 1252 | break; |
e0c2b380 | 1253 | data->ds_commit_index = i; |
799ba8d5 FI |
1254 | data->lseg = bucket->clseg; |
1255 | bucket->clseg = NULL; | |
e0c2b380 | 1256 | list_add(&data->pages, list); |
9390f425 | 1257 | nreq++; |
e0c2b380 | 1258 | } |
e0c2b380 | 1259 | |
9390f425 | 1260 | /* Clean up on error */ |
799ba8d5 FI |
1261 | for (j = i; j < fl_cinfo->nbuckets; j++, bucket++) { |
1262 | if (list_empty(&bucket->committing)) | |
e0c2b380 | 1263 | continue; |
ea2cf228 | 1264 | nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo); |
9369a431 | 1265 | pnfs_put_lseg(bucket->clseg); |
799ba8d5 | 1266 | bucket->clseg = NULL; |
e0c2b380 | 1267 | } |
e0c2b380 | 1268 | /* Caller will clean up entries put on list */ |
9390f425 | 1269 | return nreq; |
e0c2b380 FI |
1270 | } |
1271 | ||
1272 | /* This follows nfs_commit_list pretty closely */ | |
1273 | static int | |
1274 | filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
ea2cf228 | 1275 | int how, struct nfs_commit_info *cinfo) |
e0c2b380 | 1276 | { |
0b7c0153 | 1277 | struct nfs_commit_data *data, *tmp; |
e0c2b380 | 1278 | LIST_HEAD(list); |
9390f425 | 1279 | unsigned int nreq = 0; |
e0c2b380 FI |
1280 | |
1281 | if (!list_empty(mds_pages)) { | |
1282 | data = nfs_commitdata_alloc(); | |
9390f425 TM |
1283 | if (data != NULL) { |
1284 | data->lseg = NULL; | |
1285 | list_add(&data->pages, &list); | |
1286 | nreq++; | |
1287 | } else | |
ea2cf228 | 1288 | nfs_retry_commit(mds_pages, NULL, cinfo); |
e0c2b380 FI |
1289 | } |
1290 | ||
ea2cf228 | 1291 | nreq += alloc_ds_commits(cinfo, &list); |
9390f425 TM |
1292 | |
1293 | if (nreq == 0) { | |
f453a54a | 1294 | cinfo->completion_ops->error_cleanup(NFS_I(inode)); |
9390f425 TM |
1295 | goto out; |
1296 | } | |
1297 | ||
ea2cf228 | 1298 | atomic_add(nreq, &cinfo->mds->rpcs_out); |
e0c2b380 FI |
1299 | |
1300 | list_for_each_entry_safe(data, tmp, &list, pages) { | |
1301 | list_del_init(&data->pages); | |
e0c2b380 | 1302 | if (!data->lseg) { |
f453a54a | 1303 | nfs_init_commit(data, mds_pages, NULL, cinfo); |
0b7c0153 | 1304 | nfs_initiate_commit(NFS_CLIENT(inode), data, |
9f0ec176 | 1305 | data->mds_ops, how, 0); |
e0c2b380 | 1306 | } else { |
ea2cf228 | 1307 | struct pnfs_commit_bucket *buckets; |
799ba8d5 | 1308 | |
ea2cf228 | 1309 | buckets = cinfo->ds->buckets; |
f453a54a | 1310 | nfs_init_commit(data, &buckets[data->ds_commit_index].committing, data->lseg, cinfo); |
e0c2b380 FI |
1311 | filelayout_initiate_commit(data, how); |
1312 | } | |
1313 | } | |
9390f425 | 1314 | out: |
ea2cf228 | 1315 | cinfo->ds->ncommitting = 0; |
9390f425 | 1316 | return PNFS_ATTEMPTED; |
e0c2b380 FI |
1317 | } |
1318 | ||
1775bc34 BH |
1319 | static void |
1320 | filelayout_free_deveiceid_node(struct nfs4_deviceid_node *d) | |
1321 | { | |
1322 | nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node)); | |
1323 | } | |
1324 | ||
799ba8d5 FI |
1325 | static struct pnfs_layout_hdr * |
1326 | filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
1327 | { | |
1328 | struct nfs4_filelayout *flo; | |
1329 | ||
1330 | flo = kzalloc(sizeof(*flo), gfp_flags); | |
1331 | return &flo->generic_hdr; | |
1332 | } | |
1333 | ||
1334 | static void | |
1335 | filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
1336 | { | |
1337 | kfree(FILELAYOUT_FROM_HDR(lo)); | |
1338 | } | |
1339 | ||
ea2cf228 FI |
1340 | static struct pnfs_ds_commit_info * |
1341 | filelayout_get_ds_info(struct inode *inode) | |
1342 | { | |
df011748 FI |
1343 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; |
1344 | ||
1345 | if (layout == NULL) | |
1346 | return NULL; | |
1347 | else | |
1348 | return &FILELAYOUT_FROM_HDR(layout)->commit_info; | |
ea2cf228 FI |
1349 | } |
1350 | ||
7ab672ce | 1351 | static struct pnfs_layoutdriver_type filelayout_type = { |
ea8eecdd CH |
1352 | .id = LAYOUT_NFSV4_1_FILES, |
1353 | .name = "LAYOUT_NFSV4_1_FILES", | |
1354 | .owner = THIS_MODULE, | |
799ba8d5 FI |
1355 | .alloc_layout_hdr = filelayout_alloc_layout_hdr, |
1356 | .free_layout_hdr = filelayout_free_layout_hdr, | |
ea8eecdd CH |
1357 | .alloc_lseg = filelayout_alloc_lseg, |
1358 | .free_lseg = filelayout_free_lseg, | |
1751c363 TM |
1359 | .pg_read_ops = &filelayout_pg_read_ops, |
1360 | .pg_write_ops = &filelayout_pg_write_ops, | |
ea2cf228 | 1361 | .get_ds_info = &filelayout_get_ds_info, |
8dd37758 TM |
1362 | .mark_request_commit = filelayout_mark_request_commit, |
1363 | .clear_request_commit = filelayout_clear_request_commit, | |
d6d6dc7c | 1364 | .scan_commit_lists = filelayout_scan_commit_lists, |
1763da12 | 1365 | .recover_commit_reqs = filelayout_recover_commit_reqs, |
e0c2b380 | 1366 | .commit_pagelist = filelayout_commit_pagelist, |
dc70d7b3 | 1367 | .read_pagelist = filelayout_read_pagelist, |
0382b744 | 1368 | .write_pagelist = filelayout_write_pagelist, |
1775bc34 | 1369 | .free_deviceid_node = filelayout_free_deveiceid_node, |
7ab672ce DH |
1370 | }; |
1371 | ||
1372 | static int __init nfs4filelayout_init(void) | |
1373 | { | |
1374 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n", | |
1375 | __func__); | |
1376 | return pnfs_register_layoutdriver(&filelayout_type); | |
1377 | } | |
1378 | ||
1379 | static void __exit nfs4filelayout_exit(void) | |
1380 | { | |
1381 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n", | |
1382 | __func__); | |
1383 | pnfs_unregister_layoutdriver(&filelayout_type); | |
1384 | } | |
1385 | ||
f85ef69c BF |
1386 | MODULE_ALIAS("nfs-layouttype4-1"); |
1387 | ||
7ab672ce DH |
1388 | module_init(nfs4filelayout_init); |
1389 | module_exit(nfs4filelayout_exit); |